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2024 is an important node in the development of our company. The past 13 years have also witnessed our growth and progress. In order to celebrate the SCZY's 13th anniversary, bring the team closer, and enhance employees' understanding and cooperation with each other, we carefully planned a unique group activity so that everyone can feel the power of unity, cooperation, and joint creation of the future. Unite and cooperate to create a better future SCZY member cycling activities Enjoy delicious food in the lakeside This group activity aims to shorten the distance between team members, enhance team cohesion, stimulate creative potential, and jointly explore the direction of future development. Amidst the laughter, our every employee actively participating and enjoying this special moment that belongs to us. The SCZY's 13th anniversary group event is a moment full of joy, touching and relaxing. Let us witness the company's growth together and welcome a better future together! #unitedcooperation #createthefuture #SCZY's13thanniversary Thanks to all our partners and everyone for their support and dedication, let us move towards a more brilliant tomorrow together! Thanks a Bunch!

The surface detachment of investment casting parts is caused by insufficient adhesive strength on the surface or damage by external forces. Let's take a look at two key factors: insufficient self adhesive strength and external force damage. So what factors are strongly related to these two factors, specifically as follows: 1. In terms of coating viscosity for castings, the coating is used to bond sand particles, while achieving the adhesion of two coatings and sand particles. The low viscosity of the coating results in insufficient strength of the thin coating and high maintenance viscosity of the coating, resulting in poor strength due to drying or hardening after the coating. The coating temperature is too low, causing the previous layer of coating to cool and cause coating cracks to fall off. 2. In terms of coating performance for investment castings, the unqualified powder, binder, and additives themselves cause strength failure; The coating preparation time is too short and not fully recovered; Failure to standardize maintenance of coatings resulting in coating failure or uneven coating; Poor flowability of coatings; Adding a lot of foreign substances to strengthen or improve other issues in the coating, resulting in poor stability of the coating; Coating additives can accelerate the deterioration of coatings by feeling that the addition is not quantified or standardized; The preparation of coatings is not standardized according to specifications, which is very arbitrary, and the performance of coatings such as powder to liquid ratio is not up to standard. In fact, the preparation of coatings is also meticulous; The changes in coating environment have a significant impact on coating performance. 3. In terms of adhesive and sand application, the coating is too thin due to prolonged slurry control time; Short slurry control time, poor coating accumulation and drying; Poor sanding and insufficient coating strength. 4. In terms of metal casting parts drying, the drying time is too long, too dry, or too short; Inappropriate drying wind speed and temperature. 5. In terms of sand material, the sand material has a high powder content, and during the sanding process, the dust first adheres to the coating, making it too dry and poor for sanding; The improper particle size of the sand material results in inadequate adhesive strength of the coating. 6. In terms of casting process design, poor dewaxing causes deformation of the dewaxing mold shell due to expansion and stress, which can lead to cracking and detachment in severe cases; The tree string process is not suitable, and the eccentric force during the shell making process causes the mold shell to crack and the coating to fall off. 7. In terms of investment casting component structure, the product structure is flat, and the coating separates from the wax mold surface, causing coating bulging or cracking, leading to severe detachment. 8. After the casting is dewaxed, there is too much residual water in the mold shell, which is directly baked in the furnace, causing rapid vaporization of water and damaging the coating; Generally, after dewaxing, the mold shell needs to be stored for a period of time before being baked and poured. 9. The baking of the mold shell of the casting should avoid rapid heating to prevent the mold shell from rapidly expanding and causing deformation of the coating, which can lead to cracking and detachment in severe cases. 10. Is there any force on the coating during the shell making process. Drying, vibration, collision, and other factors such as sanding machines and floating sand buckets can cause coating detachment. Investment casting ( As well as known precision casting and lost wax casting) is a very complex engineering project with many influencing factors, involving various professional fields. We are a manufacturer providing investment casting services. We hope that the internal surface detachment of the mold shell we share will be helpful to investment casting practitioners. If you have any problems, please email us. We will respond with ideas, analysis, or solutions based on our work experience. Email: boah@sczyltd.com

SCZY National Day Holiday Notice Bright moon and stars twinkling and shining, wishing you and your family full of bliss and happiness. Happy Mid-Autumn Festival.

Solid Solution Heat Treatment of Austenitic Stainless Steel Castings The main function of heat treatment of austenitic stainless steel is to make the carbides precipitated in the as-cast state dissolve into the austenite matrix of the steel and improve the corrosion resistance of the stainless steel casting parts. For austenitic stainless steel castings that are prone to intergranular corrosion and pitting corrosion, correct solution treatment is very important. Solid Solution treatment has no effect on the mechanical properties of stainless steel casting parts, but the heat treatment temperature of stainless steel castings is too high or the holding time is too long, especially at the thin-walled parts of small stainless steel casting, which may cause coarse grains and reduce the mechanical properties. Solid Solution Heat Treatment Process Parameters of Austenitic Stainless Steel Castings as Following; Any Stainless Steel Castings Knowledge need to know please contact us. Contact Person: Boah Zhou Mobile:+86 189 2921 9550 (WhatsApp) Email: boah@sczyltd.com

Shenzhen SCZY Technology Co., Ltd is a leading manufacturer of high-quality CNC machining services. Our company specializes in providing precision machining solutions for a wide range of industries, including automotive, aerospace, medical, marine and electronics, and so on. Our CNC machining services are designed to meet the most demanding requirements of our clients. We use state-of-the-art equipment and advanced software to ensure that our products meet the highest standards of quality and accuracy. Our team of highly skilled technicians and engineers has extensive experience in CNC machining and is committed to delivering exceptional results. We offer a wide range of CNC machining services, including milling, turning, drilling, and grinding. Our CNC machines are capable of producing complex parts with tight tolerances and intricate geometries. We work with a variety of materials, including aluminum, brass, stainless steel, titanium, and plastics, among others. At Shenzhen SCZY Technology Co., Ltd, we understand the importance of timely delivery and cost-effective solutions. We work closely with our clients to understand their specific needs and provide customized solutions that meet their requirements. Our commitment to quality, reliability, and customer satisfaction has earned us a reputation as a trusted partner in the CNC machining industry. In summary, Shenzhen SCZY Technology Co., Ltd is a leading provider of CNC machining services. We offer a wide range of precision machining solutions for various industries and materials. Our commitment to quality and customer satisfaction has made us a trusted partner in the CNC machining industry.

The development of the casting field is obvious to all, and the casting methods have become diversified. Among the many casting methods, there is a low pressure casting, which is more important and has more advantages. Low pressure casting includes investment casting, precision casting, lost wax cating and sand casting. But each has its own characteristics. It is difficult for one method to be perfect, so low-pressure casting also has defects in some aspects. Shenzhen SCZY Technology Co., Ltd will introduce some advantages and disadvantages of low-pressure casting, which is also helpful to promote the improvement of products. 1. Advantages of low pressure casting It can be seen through practice that the use of low-pressure casting to produce metal castings has a very high utilization rate of raw materials. Mainly because of its technology, there will be no runners and risers. In this way, the processing time will be greatly shortened, and the overall work efficiency will be greatly improved. Again, low-pressure casting is very suitable for some High air tightness, high-precision products, sand holes and pores of the product that cannot be improved by other casting processes, low-pressure casting is no problem. It is also because of the production process that metal castings can form a directional solidification, which reduces the possibility of internal defects. Because of the above points, even if the operator's skills are not very good, it is still possible to cast products with excellent quality and performance. 2. Disadvantages of low pressure casting In the low-pressure casting process, although the problems of the sprue and the riser are saved, the gate is still an obvious problem and is somewhat restricted. Moreover, low-pressure casting is not suitable for mass processing, because the productivity of this casting process is relatively poor, and its entire production cycle will be relatively long. In addition, the high control requirements for various data make low-pressure casting difficult in some aspects. Applications are restricted.

1. POM, also known as polyoxymethylene or Delrin, is one of the easiest and most commonly used plastic materials for plastic precision machining. Although it is easier to process than ABS, high-strength engineering plastics are slightly more expensive as raw materials, which affects its overall processing cost. POM is known for its excellent wear resistance, low friction, strength and dimensional stability. These material properties lead to the use of POM in various end-use plastic machining applications such as the production of palstic machining parts of gear bearings, automotive parts, consumer electronics, plumbing components, etc. 2. ABS is a widely used machined plastic that meets the needs of many industries due to its material properties and affordable cost. ABS is one of the best processable plastics with low raw material cost. Both of these factors lead to the material being used in many prototype applications as well as some end-use applications. In terms of performance, ABS has excellent impact resistance, as well as good temperature and chemical resistance. The high machinability of ABS results in parts with a high-quality surface finish. Machined ABS parts can also undergo a number of post-processing treatments, including surface metallization, plating, bonding and more. 3. PMMA also known as acrylic, is a transparent precision machined plastic material with good strength and stiffness properties. This plastic has good processability and low raw material costs, making it an ideal choice for many manufacturers. As one of the most commonly used plastics, you can see PMMA almost everywhere. Due to its transparency, machinists often use it as an alternative to glass in the fields of architecture, interior design and chemistry. Mechanics use this weather-resistant material when making billboards and other signs. 4. PA also known as Nylon, is a versatile synthetic polymer with properties such as good mechanical strength, shock absorption, and abrasion resistance. While the cost of PA raw material is relatively low, the material's moderate machining rate can affect the cost of some projects, especially those requiring tight tolerances and fine features. It is widely used in the production of various structural components and as a cheaper alternative to metal components. The material's good electrical insulation and chemical resistance also make it attractive to plastics processors in many industries. 5. PC or polycarbonate is a transparent thermoplastic material with high strength and stiffness. The most popular material property of PC is usually its excellent impact resistance. PC also has good machinability – meaning that the material is relatively inexpensive to machine. However, the cost of raw PC (rod or plate) is the highest among precision machined plastics. In terms of application, PC has a wide range of applications in plastic cnc machining in the automotive industry. They use it to produce various automotive parts such as dashboards, pumps and valves. Among other areas, they use the plastic material to produce protective gear, internal mechanical parts, medical equipment and more.

Now I think we have talked quite a lot of the procedures of investment casting parts produciton. Today we want to talk about the pouring methods commonly used in investment casting production. Do you know about it? 1) There are the following methods for hot gravity pouring. This is the most widely used form of casting, that is, after the shell is taken out of the roasting furnace, it is poured at high temperature. At this time, the metal cools slowly in the mold shell and can fill the mold with high fluidity, so the casting can well replicate the shape of the cavity and improve the precision of the casting. However, the slow cooling of the casting in the hot mold will make the grain coarse, which reduces the mechanical properties of the casting. When casting carbon steel castings, the surface of the casting that cools slowly is also prone to oxidation and decarburization, thereby reducing the surface hardness, smoothness and dimensional accuracy of the casting. 2) Vacuum suction pouring Put the shell in the vacuum pouring box, absorb the gas in the cavity through the tiny pores in the shell, so that the liquid metal can better fill the cavity, copy the shape of the cavity, improve the precision of the casting, prevent air holes, pouring Insufficient defects. This law has been applied abroad. 3) Crystallization under pressure Put the shell in the pressure tank for pouring. After the completion, close the pressure tank immediately, and pass high-pressure air or inert gas into the tank to solidify the casting under pressure to increase the density of the casting. The maximum pressure abroad has reached 150atm. 4) Directional crystallization (directional solidification) Some investment castings, such as turbine blades, magnetic steel, etc., if their crystal structure is columnar crystals arranged in a certain direction, their working performance can be improved a lot, so investment casting directional crystallization technology is developing rapidly. SCZY LTD is one of the professional leader in this industry, welcome you to come to us if any project need us for help at any time.

Our SCZY LTD is one of the leading manufactuers of investment casting parts also we call it lost wax casting parts in China. Today we want to share the housing making process of the lost wax casting processing. Let's discuss it more. The main procedures and processes in the housing making process are: 1) Degreasing and degreasing of modules When using wax-based molding materials to make investment patterns, in order to improve the ability of the paint to wet the surface of the module, the oil on the surface of the module needs to be removed. 2) Apply paint and sand on the module Before applying the paint, the paint should be stirred evenly to reduce the precipitation of refractory materials in the paint bucket as much as possible, and adjust the viscosity or specific gravity of the paint so that the paint can well fill and wet the investment mold. The module is soaked in the paint and shakes up and down so that the paint can wet the investment mold well and cover the surface of the module evenly. After the paint is applied, it can be sanded. 3) Shell drying and hardening After each layer of shell is coated, it must be dried and hardened, so that the binder in the coating changes from sol to jelly and gel, and the refractory materials are connected together. 4) Melt and lose the mold from the housing shell After the mold shell is completely hardened, the module needs to be melted from the mold shell. Because the mold module is usually made of wax-based molding material, this process is also called dewaxing. According to the different heating methods, there are many, the dewaxing method, the hot water method and the same pressure steam method are used more. 5) Roasted shell If molding (sand filling) casting is required, before firing, bury the demoulded shell in the sand in the box, and then load it into the furnace for firing. If the high-temperature strength of the mold shell is high and no casting is required, the molded shell after demolding can be directly sent to the furnace for roasting. When firing, gradually increase the furnace temperature, heat the shell to 800-1000°C, keep it warm for a period of time, and then pour it.

We SCZY LTD has made quite a lot of Custom precision turning compound processing parts. Today we are going to talk something about this five-axis turning and milling compound machining center. Different opinions and inquiry about these kinds of precision CNC machining parts , just feel free to contact with us : sandy@sczyltd.com. The five-axis turning-milling compound machining center has a history of nearly 20 years since its creation. The technology has matured and has been accepted and recognized by users at home and abroad. From the trend point of view, it mainly develops in the following directions: 1. Higher process range: By adding special function modules, more process integration can be realized. For example, the gear processing, internal and external grinding processing, deep hole processing, cavity processing, laser quenching, online measurement and other functions are integrated into the turning and milling center to truly complete the complete processing of all complex parts. 2. Higher efficiency: By configuring functions such as dual power heads, dual spindles, and dual turrets, it can realize multi-tool simultaneous processing and improve processing efficiency. 3. Large-scale: Since large parts are usually parts with complex structures, many parts and processes that require processing, and time-consuming installation and positioning, one of the main advantages of turning and milling composite processing is to reduce the number of parts in the process of multi-process and multi-process processing. Multiple reinstallation adjustments and clamping times, so it is advantageous to use a turn-mill center for combined machining. Therefore, the current five-axis turning and milling compound machining center is developing towards large-scale. For example, the HTM125 series five-axis turning and milling center of Shenyang Machine Tool has a rotary diameter of 1250mm and a processing length of 10000mm, which is very suitable for turning and milling of large marine diesel engine crankshafts. 4. Structural modularization and functions can be quickly reorganized: The rapid reorganization of the functions of the five-axis turning and milling center is an important condition for it to quickly respond to market demand and seize the market, and the structural modularity is the basis for the rapid reorganization of the functions of the five-axis turning and milling center. Many products of some technologically advanced manufacturers have achieved structural modular design, and are working hard on how to realize rapid function reorganization. OK, so much for today's sharing.

Dear friends, Christmas is coming soon, we would like to extend to you our sincere holiday greetings and best wishes in this special Christmas season. Wish you a happy New Year. May all of you be blessed with happiness and health. Thank you very much for your trust and support to us. We are always ready to help you for any suitable projects. By the way, our CNY holiday will be also coming soon next month which will be started from Jan.17 to Jan.31, so we would like to remind you that if you have any urgent project , pls help to inform us in advance in case any delay for production. SCZY LTD is specialized in non-standard parts customization by die casting parts, CNC machining parts as well as lost wax casting parts.

Steel casting parts often have various casting defects such as blisters, pores, cracks, shrinkage porosity, shrinkage cavities and inclusions, and production control is difficult, especially for sand-cast alloy steel castings. The melting point of cast steel is high, the molten steel is easy to oxidize, the fluidity of molten steel is poor, and the shrinkage is large. The volume shrinkage rate is 10-14%, and the linear shrinkage rate is 1.8-2.5%. In order to prevent defects such as undercasting, cold shut, shrinkage cavity and shrinkage porosity, cracks and sand sticking in steel castings, more complicated technological measures must be taken. 1. Due to the poor fluidity of molten steel, in order to prevent cold shut and insufficient pouring of steel castings, the wall thickness of steel castings should not be less than 8mm; the structure of the pouring system should be as simple as possible; dry casting or hot casting should be used; The temperature is generally 1520 ° ~ 1600 ° C, because the pouring temperature is high, the superheat of the molten steel is large, and the time to maintain the liquid state is long, and the fluidity can be improved. However, if the pouring temperature is too high, it will cause defects such as coarse grains, hot cracks, pores and sand sticking. So for general small, thin-walled and complexly shaped casting, its pouring temperature is about the melting point of steel + 150 ℃; for large, thick-walled casting, its pouring temperature should be about 100 ℃ higher than its melting point. 2. Due to the large shrinkage of casting steel, in order to prevent shrinkage cavities and shrinkage defects in castings, measures such as risers, chillers and subsidies are mostly used in the casting process to achieve sequential solidification. 3. In order to prevent shrinkage cavity, shrinkage porosity, porosity and crack defects in steel castings, the wall thickness should be uniform, sharp corners and right-angle structures should be avoided, sawdust should be added to the casting sand, coke should be added to the core, and Use hollow cores and oil sand cores to improve the concession and air permeability of sand molds or cores. 4. The melting point of casting steel is high, and the pouring temperature is correspondingly high. The molten steel interacts with the mold material at high temperature, and it is very easy to produce sticky sand defects. Therefore, artificial quartz sand with high refractoriness should be used as the casting mold, and the coating made of quartz powder or zirconium sand powder should be brushed on the surface of the casting mold. In order to reduce the source of gas, improve the fluidity of molten steel and the strength of the mold, most steel casting are cast in dry or quick-drying molds, such as water glass quartz sand cast molds hardened by CO2.

The following steps are what we follow to produce investment parts with complex geometries and intricate details. 1. Create wax pattern: A pattern that replicates the finished part geometry is made using one of two primary methods: A. Build a wax injection die B. 3D print pattern I. If a wax injection die will be used, the first step involves designing and building a metal die from Aluminum. This die creates a wax replica of the desired part by injecting melted wax under high pressure into the cavity. The die can be made as a simple one cavity manual tool or a complex multi-cavity automatic tool depending on volume requirements. II. If a 3D printed pattern will be used, a CAD model which contains the part geometry is sent to a printer and the part is printed. 2. Wax Assembly: Next, the wax patterns are assembled onto runners and into a finished tree which is ready to be dipped. 3. Slurry Coating: The assembly is then dipped into a high-grade ceramic slurry to build a ceramic shell around the wax tree. 4. Stuccoing: After the slurry coating is done, particles of sand are dropped onto the surface of the wet tree assembly. This helps to thicken and strengthen the layer of coating on the wax assembly surface. 5. Repeat Steps 5 and 6: Repeat steps 5 and 6 until the assembly achieves the desired shell thickness. The assembly is then allowed to set and dry. 6. Dewaxing: The wax inside the newly built shell is now removed. Dewaxing is done using a steam-dewaxing autoclave or flash fire furnace. 7. Casting: Now the desired molten metal is poured into the pre-heated mold cavity. 8. Cooling: The mold then sits to allow the molten metal to cool and solidify which then becomes the final casting. 9. Shell Removal: The shell material is then removed through processes hammer knockout, vibration, and steel grit blasting. 10. Cut Off: The finished parts are then cut free from the gating and runner system. 11. Finishing: Various finishing techniques are then employed including grinding, sand blasting and coating to achieve the final surface needed. 12. Testing: Once the finishing operations are done, the parts are inspected for surface and sub-surface defects. Visual and fluorescent penetrant inspection is done for surfaces and X-ray is employed for sub-surface defect identification.

SCZY LTD is specialized in lost wax casting for different materials, normally we do Stainless Steel Casting, carbon steel casting, brass casting, as well as other special alloy casting, etc . For lost wax casting, we also call it investment casting, which is a production process in ancient China. In modern times, it is still the method used to bring out the finest details in metalwork. Such products are often difficult to manufacture due to their cumbersome design. The lost wax method enables any metal to completely and faithfully reproduce its wax pattern. Therefore, this method is still widely used in fields such as sculpture, jewelry processing, dentistry and industrial restoration. The biggest advantage of investment casting precision casting is that due to the high dimensional accuracy and surface finish of investment castings, machining work can be reduced, and only a small amount of machining allowance can be left on parts with higher requirements, and even some castings Only the grinding and polishing allowance is left, and it can be used without machining. It can be seen that the investment casting method can save a lot of machine tool equipment and processing man-hours, and can greatly save metal raw materials. Another advantage of the investment casting method is that it can precision cast complex castings of various alloys, especially high-temperature alloy castings. For example, the blades of jet engines, whose streamlined outline and inner cavity for cooling, can hardly be formed by mechanical processing technology. Production by investment casting technology can not only achieve mass production, but also ensure the consistency of castings, and avoid the stress concentration of residual knife lines after machining. Our country began to apply investment casting to industrial production in the 1950s and 1960s. Since then, this advanced precision casting technology has been greatly developed, and has been widely used in manufacturing industries such as aviation, automobiles, machine tools, ships, internal combustion engines, gas turbines, telecommunication instruments, weapons, medical equipment, and knives as well as some arts and crafts.

Stainless steel precision casting mainly includes the wall thickness, shape and weight of castings. Do you know what are the process methods of stainless steel precision casting? 1. The characteristics of sand precision casting, due to the favorable conditions such as internal sand core, loose block pattern, gasification mold and other special molding techniques, it can produce castings with complex structural shapes. 2. The characteristics of investment precision casting can cast metal castings with extremely complex shapes, and its complexity is difficult to achieve by any other method. Although the shape of the investment mold that can be produced by a pressing type is relatively simple. 3. The characteristics of pressure precision casting. Since the molten metal is filled into the mold under high speed and high pressure in pressure casting, castings with complex shapes and thin walls can be cast. Many castings that cannot be produced by gravity (sand, metal) casting, most can be die-cast. 4. The characteristics of metal mold precision casting, the weight range of metal mold casting castings is generally 0.1-135kg, and some can reach 225kg. Since the cavity of the metal mold is made by machining, the structural shape of the casting cannot be very complicated, and the possibility of taking the casting out of the mold should be considered. When all of us are stainless steel precision casting, we can operate according to the above process methods. The correct way to use stainless steel precision casting is what we all need.

1. Stainless steel castings have good wear resistance and shock absorption function, because graphite in cast iron is good for lubrication and oil storage, so it has good wear resistance. Also due to the presence of graphite, gray cast iron has better damping properties than steel.SCZY company introduced that stainless steel castings have good process performance. Because gray cast iron has high carbon content and is close to eutectic composition, it has relatively low melting point, good fluidity and small shrinkage rate, so it is suitable for casting complex structure or thin-walled castings. 2. Since graphite makes it easy to form chips during cutting, the machinability of gray cast iron is better than that of steel. Precision casting is a process in which metals are smelted into liquids that meet certain requirements and poured into molds, cooled and solidified, and cleaned to obtain castings with predetermined shapes, sizes and properties. 3. After forging, stainless steel forging parts can improve its structure and mechanical properties. After the casting structure is thermally processed and deformed by forging, due to the deformation and recrystallization of stainless steel, the original coarse dendrites and columnar grains become equiaxed recrystallization structures with fine grains and uniform sizes, so that the original ingots in the steel ingot Segregation, porosity, pores, slag inclusions, etc. are compacted and welded, and the structure becomes tighter, which improves the plasticity and mechanical properties of the metal. 4. The mechanical properties of stainless steel castings are lower than those of forgings of the same material. However, the forging process can ensure the continuity of the metal fiber structure, so that the fiber structure of the forging is consistent with the shape of the forging, which can ensure that the parts have good mechanical properties and prolong the service life. Precision die forging, cold extrusion, warm extrusion and other processes are used. The forgings produced are unmatched by castings. 5. Precision casting is a relatively economical blank forming method, and it can show its economical efficiency for parts with complex shapes. Such as cylinder blocks and cylinder heads of automobile engines, ship propellers, and exquisite artworks. Some difficult-to-cut parts, such as nickel-based alloy parts of gas turbines, cannot be formed without casting. In addition, the size and weight of cast parts have a wide range of adaptation, and the metal types are almost unlimited; while the parts have general mechanical properties, they also have comprehensive properties such as wear resistance, corrosion resistance, and shock absorption. Rolling, welding, punching, etc. cannot be done. Because the casting blank is almost formed, the purpose of free machining or a small amount of machining reduces the cost and reduces the time to a certain extent. Casting is one of the basic processes of modern manufacturing industry.

Pores are a common phenomenon in the production process of aluminum casting parts, especially in the manufacturing process of die casting parts and powder metallurgy, due to the residual pores, crystal shrinkage and other reasons, a large number of micropores, sand holes, cracks, etc. are inevitably formed, and microporous penetration Leakage will bring hidden dangers to the use of machinery and equipment. Even if it is used for applications without pressure requirements, the electroplating, painting and surface treatment electroplating solution, acid solution, etc. may enter the interior of the casting, causing internal corrosion and shortening the service life of the parts. Due to the existence of micropores, the surface is sprayed and electroplated. Bubbles or bumps. However, the scrapping of aluminum alloy castings through impregnation is almost zero, which greatly saves costs and makes full use of limited resources, and the manufactured products are more in line with standards. The purpose and function of impregnating aluminum casting parts are obvious. On the one hand, through such treatment, aluminum castings can be endowed with pressure resistance, sealing, and corrosion resistance. Or non-communicating micropores, which can prevent internal corrosion. On the other hand, it can be used as a pretreatment for synthetic treatment, filling the recessed seam, preventing discoloration, corrosion, peeling and expansion; improving cutting performance, and the impregnating liquid filled inside the metal can act as a lubricant to extend the life of the tool Extended and reduce machining costs. At the same time, it also helps to improve the physical strength and insulation of aluminum alloy investment castings. The impregnating liquid fills and blocks the internal gaps of the micropores, reduces the physical strength, and can make the product design thinner; plugging the internal cavity can improve protection. The effective resistance value.

The position of the metal casting in the mold during pouring affects the quality, dimensional accuracy and difficulty of the molding process. Selection principle of pouring position for precision castings: 1. The important processing surface or main processing surface of the precision casting is facing down or on the side: when pouring, the gas, slag and sand in the casting mold will float up in the molten metal, which may cause pores, slag inclusions, etc. to appear in the upper part of the casting. Defects such as trachoma, and the possibility of defects in the lower part of the casting, the structure is denser. The pouring position of the machine bed should face down the guide rail to ensure the quality of the important working surface. The quality requirements of the circumferential surface are relatively high, and the vertical pouring scheme can make the circumferential surface on the side, and the quality is uniform. 2. The large plane of the precise cast is poured downward or inclined: due to the strong thermal radiation of the hot metal liquid to the upper part of the mold during pouring, the top sand mold will expand and arch or even crack, causing sand inclusions, sand holes, etc. on the large plane. defect. The production casting defects of the large plane can be avoided by the method of casting the large plane downward or adopting the inclined pouring method. 3. The thin-walled part of the precision casting faces downwards, stands sideways or is inclined: in order to prevent the thin-walled parts of the castings from being cold and unable to be poured, the thin-walled part with a larger area should be placed at the lower part of the casting, or placed on the side wall or tilted position. 4. The thick part of the precision casting should be placed on the top or on the side of the parting surface. The main purpose is to facilitate the placement of the riser in the thick part for feeding. Above method are suitable use in the precsion metal investment casting parts, such as the Stainless Steel Precision Casting, Carbon Steel Precison Casting Parts and Brass Lost Wax Casting Parts etc.

In the process of manufacturing aluminum casting parts, it is necessary to effectively prevent the generation of pores. In the process of manufacturing, it is necessary to take effective measures to reduce the moisture of its raw materials as much as possible. In the process of processing aluminum castings, it is necessary to choose a reasonable investment casting process. Effectively strengthen its smelting quality management. All the raw materials used in aluminum alloy castings and the tools needed for smelting need to be carefully removed from the surface of the oil and rust, and the quality of the alloy in the product and the return material also needs to be controlled in time, and the quality is poor. The returned material has broken metal scraps and so on. In general, the metal surface not only condenses its water, but also effectively interacts with the metal oxide film to form its crystal water, and then bakes at a low temperature at a certain temperature, so that its dissolved water and partial condensation can be effectively removed. of water. Aluminum investment casting can easily remove most of their crystals at 500 degrees. In the process of operation, it is necessary to shorten the smelting time as much as possible, so as to effectively reduce the amount of inhalation of its aluminum alloy, and the smelting of its products. The temperature must not be too high. Because the higher the temperature is, the larger the suction volume will be, so in general, the temperature will not exceed 800 degrees. During the smelting process, it must be controlled by a temperature measuring device, and it needs to be effective in the process of use. Control its deterioration time, the longer the deterioration time, the higher the deterioration temperature. The liquid surface of the aluminum alloy investment castings is protected by an oxide film, which can effectively prevent the molten metal from directly reacting with the moisture in the atmospheric water. In this way, the damage and deterioration of the oxide film should be avoided as much as possible during the smelting and casting process.

1. Sheet metal machining Sheet metal mold making is fast and cheap, with very short lead times. Sheet metal can be a good alternative to plastic injection mold for internal structural components, as it provides greater flexibility early in the design process, when changes may still occur or the forecast for the product is unclear. 2. CNC Machining CNC is a cost-effective solution for machining parts with complex shapes and tight tolerances. Cnc precision machining can machine almost any shape, as long as the rotating cutting tool can access the material. 3. Cnc turning Cnc turning processes include cutting, facing, threading, forming, drilling, knurling and boring. For surface machining of hardware parts, turning is usually a good choice if you want to have precision bearing surfaces in complex machines. 4. EDM Wire-discharge machining (EDM) is a high-precision technology that can cut virtually any conductive material. A thin, charged EDM wire mounted between two mechanical rails forms one electrode, while the material being cut forms the other. The electrical discharge between the two electrodes (wire and workpiece) creates sparks that cut the material. Because the live wire never touches the workpiece during EDM machining, the process can be used to make very small and Precision Machined parts that require a level of precision and complexity that cannot be achieved with conventional machining.