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Recently, the precision casting industry has experienced a major breakthrough. With the application of 3D printing technology, the casting process can be further optimized, bringing a more efficient and precise production method to the manufacturing industry. The traditional precision casting process requires multiple steps such as mold making, melting casting materials, injection into the mold, cooling and solidification, etc., and requires a lot of manual operations. This process is not only time-consuming and labor-intensive, but also prone to problems such as mold wear and casting deformation, which affects product quality. The application of 3D printing technology can solve these problems. Through 3D printing technology, the precision casting industry can directly transform design drawings into physical products without making molds. This not only greatly shortens the production cycle, but also reduces production costs. At the same time, 3D printing technology can realize the manufacturing of castings with complex structures, improving the accuracy and quality of products. In addition to improving production efficiency and product quality, 3D printing technology also brings more innovative possibilities to the precision casting industry. The traditional casting process is limited by the production and design of molds, making it difficult to manufacture products with complex shapes and structures. 3D printing technology can realize free-shape design and manufacturing, providing more possibilities for product innovation. In addition, 3D printing technology can also achieve small batch and personalized production. The traditional casting process requires the production of a large number of molds and is suitable for mass production. 3D printing technology can be customized according to customer needs to meet the needs of different customers. This new breakthrough in the precision casting industry has attracted widespread attention. Experts said that the application of 3D printing technology will further promote the development of the precision casting industry and improve the competitiveness of the industry. At the same time, this will also bring more innovation and development opportunities to the manufacturing industry. All in all, the precision casting industry has ushered in a major breakthrough with the application of 3D printing technology. The application of this technology not only improves production efficiency and product quality, but also brings more innovation possibilities to the industry. With the continuous development and improvement of technology, I believe that the precision casting industry will usher in a better future.

Jiangsu Dingtian Stainless Steel Products Co., Ltd. recently announced that it has become a leader in the stainless steel industry with its superior product quality and excellent customer service. The company has extensive experience in the design, production and sales of stainless steel products and continuously introduces innovative products to meet market demand. As a manufacturer specializing in stainless steel products, Jiangsu Dingtian Stainless Steel Products Co., Ltd. is known for its strict quality control and efficient production processes. The company has an experienced design team that is able to provide customized product solutions based on customer needs. At the same time, the company has also introduced advanced production equipment and technology to ensure product quality and delivery time. The product lines of Jiangsu Dingtian Stainless Steel Products Co., Ltd. include stainless steel pipes, stainless steel pipe fittings, stainless steel plates and other series. These products are widely used in petrochemical, food and beverage, pharmaceutical, construction and other industries, and have been well received by customers. The company's products are not only of excellent quality, but also reasonably priced, providing customers with excellent cost performance. In the fierce market competition environment, Jiangsu Dingtian Stainless Steel Products Co., Ltd. has won the trust and support of our customers through continuous innovation and improvement of product quality. The company actively participates in domestic and foreign industry exhibitions and exchange activities, cooperates and communicates with companies in the same industry, and continuously improves its competitiveness. The success of Jiangsu Dingtian Stainless Steel Products Co., Ltd. is inseparable from the hard work and teamwork spirit of all employees. The company attaches great importance to employee training and development, provides employees with a good working environment and welfare benefits, and stimulates employees' work enthusiasm and creativity. Looking to the future, Jiangsu Dingtian Stainless Steel Products Co., Ltd. will continue to be committed to providing high-quality stainless steel products to meet customer needs. The company will continue to increase investment in research and development, continuously launch new products, and expand market share. At the same time, the company will also strengthen communication and cooperation with customers to continuously improve customer satisfaction. I believe that in the near future, Jiangsu Dingtian Stainless Steel Products Co., Ltd. will achieve greater achievements in the stainless steel industry.

Precision casting is a kind of casting with less cutting or no cutting, which has the characteristics of beautiful surface, good overall precision and high quality. Many buyers are also purchasing for these characteristics of precision castings. Among them, the demand for stainless steel precision castings is the strongest. Compared with investment castings of other materials, stainless steel investment castings have a longer service life. Many people think that this is related to the fact that stainless steel materials will not rust. Is this popular assumption really correct? In fact, stainless steel materials are not really rust-free. If the production process is not handled properly, the surface of stainless steel investment castings will still rust. In order to prevent rusting of precision castings, what do precision casting factories generally do? Usually, in order to reduce the rusting factors of investment castings, investment casting manufacturers will consider carefully from multiple angles to minimize the chance of rust. 1. In terms of structural design, precision casting manufacturers will carry out the production and modeling design that are conducive to the model and core box. When selecting the mold core, the precision casting factory will ensure the air permeability of the mold, which can stably discharge a large amount of gas generated when the stainless steel molten metal is poured; the structure of the precision casting should be able to make it gather as much as possible without any obstruction when cooling and solidifying 2. In terms of external casting, the shape of precision castings should be simple and easy to cast. The flatness of each plane of the castings must be fully guaranteed to prevent dust or certain chemical components from hiding in the holes due to uneven castings, causing Chemical corrosion of castings.

Matters needing attention in the machining process of CNC machine tools The operating data, setting data and processing programs of the CNC system are generally stored in the RAM memory. When the system is powered, it is maintained by a backup battery or a lithium battery. As a result, downtime is longer, and unplugging power or memory may result in loss of data and inoperability of the system. At the same time, since CNC equipment uses three-phase AC 380V power supply, the safety of CNC equipment installation is an important part of the preliminary work. Based on the above reasons, the use of CNC equipment power supply has the following requirements: First, the power grid voltage fluctuation should be controlled between +10%-15%, while China's power supply fluctuates greatly, the quality is poor, and there are hidden disturbances such as high-frequency pulses, plus human factors (such as sudden switch off electricity, etc.). During peak hours, such as an hour before or about an hour before get off work during the day, and at night, the allowable range is often exceeded by ±20%. So that the machine can not alarm and work normally, and cause damage to the power system of the machine. It will even lead to the loss of related parameter data. This phenomenon has occurred on machine tools such as CNC machining centers or turning centers, and the frequency of occurrence is high, which should be paid attention to. It is recommended to configure an AC voltage regulation power supply system with automatic compensation adjustment function in the CNC machine tool centralized workshop. A single CNC machine tool can be configured with an AC voltage stabilizer. Second, it is recommended to connect electromechanical devices to a single power source. If other parts of electrical equipment (eg electronic circuits, electromagnetic clutches) need to be supplied from other sources, these sources should be obtained as far as possible from components (eg transformers, transducers, etc.) that form part of the electromechanical equipment. For large, complex machinery, including many machines that work together and take up more space, more than one inductive power supply may be required, depending on the configuration of the field power supply. Unless the plug/socket of the electromechanical device is directly connected to the power supply, it is recommended to connect the power cord directly to the power terminal of the power cut-off switch. If this is not done, a separate power strip should be provided for the power cord. The power cut-off switch handle should be easily accessible and should be installed between 0.6M - 1.9M in an easy-to-operate position. The maximum recommended value is 1.7M. This will allow for rapid power outages in an emergency, reducing losses and casualties. Third, the requirements of CNC machine tools for compressed air supply system CNC machine tools generally use a large number of pneumatic components, so the workshop should be connected to a clean and dry compressed air supply system network. Flow and pressure should meet the requirements. Install the compressed air machine away from the CNC machine. According to the layout and gas consumption of the workshop, consideration should be given to the installation of refrigerated air in coal, air filters, gas storage tanks, safety valves and other equipment for the compressed air supply system network. Interested in our CNC Machining Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

Advantages and disadvantages of silica sol precision casting The biggest advantage of silica sol precision casting in the production process is that the investment casting has very high dimensional accuracy, and the surface finish of the product is very high. The use of silica sol precision casting can reduce its mechanical processing to a certain extent. Work. Silica sol precision casting can leave a little machining allowance on the parts with high requirements. In the process of processing and even some castings, only polishing allowance and grinding are left, and they can be used without machining. The processing technology of silica sol precision casting is relatively complex and uncontrollable, and it consumes a lot of materials in the processing process, so this processing method is very suitable for processing small parts with high precision requirements, complex shapes and difficult to process. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

What is the process flow of silica sol precision casting? Silica sol precision casting mainly produces high-end precision castings, mainly made of stainless steel 304 and 316, and the unit weight of the product is the main supply market. When we all use silica sol precision casting, how do we generally operate this casting? Silica sol precision casting belongs to investment casting. The general process of silica sol precision casting is as follows: First, make wax molds (fired molds) with fusible paraffin and stearic acid. And then coat the wax molds with silica sol zircon sands and refractory powder to make mud molds. Dry the mud molds out and put them into hot water to melt the wax molds inside. When the wax molds inside are completely melted, take them out, fire them into ceramic molds and silica sol investment molds are manufactured. When the ceramic molds are fired, a sprue gate must be reserved to allow molten metal flow in. Cool the molten metal down and castings are produced. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

Silica Sol Investment Casting for Precision Casting Silica sol investment casting, as its name implies, is a casting technique that adopts silica sol investment molds for casting manufacturing. Silica sol investment mold is a kind of casting mold that takes silica sol zircon sand as molding materials. Features This technique is mainly used to produce carbon steel and stainless steel castings. These castings generally have the following features: Excellent corrosion resistance performance and great dimensional accuracy. Better surface finish and smaller geometric dimension deviation. Widely used as auto parts, pipe parts, valve parts, pump parts, ship hardware furniture decorative parts, etc. Technical Data Linear tolerance: ±0.1 mm. Surface finish: Ra 6.3 Weight: 0.01–50 kg. Minimum hole diameter: 2 mm. Minimum round corner radius: 0.1 mm. Minimum thickness: 0.7 mm. Casting tolerance: 5–6. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

Multi-axis CNC machining CNC milling involves removing material using rotating tools. Either the workpiece remains stationary and the tool moves onto the workpiece, or the workpiece enters the machine at a predetermined angle. The more axes of motion a machine has, the more complex and faster its forming process becomes. 3-axis CNC machining Three-axis CNC milling remains one of the most popular and widely used machining processes. In 3-axis machining, the workpiece remains stationary and the rotating tool cuts along the x, y, and z axes. This is a relatively simple form of CNC machining that produces products with simple structures. It is not suitable for machining complex geometries or products with complex components. Since only three axes can be cut, machining can also be slower than with four or five-axis CNC, as the workpiece may need to be manually repositioned to obtain the desired shape. 4-axis CNC machining In four-axis CNC milling, a fourth axis is added to the motion of the cutting tool, allowing rotation around the x-axis. There are now four axes - x-axis, y-axis, z-axis and a-axis (rotation around the x-axis). Most 4-axis CNC machines also allow the workpiece to rotate, which is called the b-axis, so that the machine can function as both a milling machine and a lathe. 4-axis CNC machining is the way to go if you need to drill holes on the side of a part or on the surface of a cylinder. It greatly speeds up the machining process and has high machining accuracy. 5-axis CNC machining Five-axis CNC milling has an additional axis of rotation compared to four-axis CNC. The fifth axis is the rotation around the y-axis, also known as the b-axis. The workpiece can also be rotated on some machines, sometimes called the b-axis or c-axis. Due to the high versatility of 5-axis CNC machining, it is used to manufacture complex precision parts. Such as medical parts for artificial limbs or bones, aerospace parts, titanium parts, oil and gas machinery parts, military products, etc. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

CNC machining is the manufacture and processing of parts and products under computer control. CNC machining involves the use of computer numerical control (CNC) machines to shape and resize a piece of material, or workpiece, by automatically removing material. Typically, the material used is plastic or metal, and when removal is complete, the finished product or product has been produced. This process is also known as subtractive manufacturing. For CNC machining, a computer application is used to control the movement of the machine tool. Types of common CNC machine tools CNC machining processes include the most common milling and turning, followed by grinding, electrical discharge machining, etc. Milling Milling is the application of a rotary tool to the workpiece surface, moving along 3, 4 or 5 axes. Milling is basically the cutting or trimming of workpieces, allowing complex geometries and precision parts to be quickly machined from metals or thermoplastics. Turing Turning is the use of a lathe to manufacture parts containing cylindrical features. The workpiece rotates on a shaft and contacts a precision turning tool to form rounded edges, radial and axial holes, grooves and grooves. Advantages of CNC machining Compared to traditional manual machining, CNC machining is much faster. As long as the computer code is correct and conforms to the design, the finished product has high dimensional accuracy and small errors. CNC manufacturing is an ideal rapid prototyping manufacturing method. It can also be used to manufacture end-use products and components, but is usually only cost-effective in low-volume, short-run production runs. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

A Leader Our Mold Making Techology Our Mold Making Techology has expanded and diversified into all areas of investment casting. From specialized precision casting through to advanced machining and heat treatment, we produce custom parts and deliver quality outcomes across industry sectors. With years of experience and serious infrastructure investment, Dingtian is a leader in casting and mold making. Our Mold Making Capabilities Equipment: Daxie, Demaggi, Fanuc, Hongquing, Li Chi, Mazak, Brothers, Doosan, Oil Machine, Oil Xin, Key, Jinshang Materials: Carbon steel, alloy steel, stainless steel, aluminum, copper Industries Served: Arms Industry, Automotive, Aviation, Electrical, Hardware, Industrial, Rail/Train Industry What is Mold Making? Mold making is a metal casting process that shares similarities to die casting. Metal Mold making (i.e. casting), like die casting, uses a metal mold that can be reused for several thousand cycles. Since the molten metal is poured and not forcibly injected, mold casting is often referred to as gravity die casting. Once the molten metal is poured into the mold, it is clamped shut. After the metal cools and solidifies into the desired part shape, the mold is opened and trimmed. Custom Mold Making All custom mold making projects begin with a consultation, with our design department reviewing all product specifications and available information. Communication and attention to detail are integral to our approach, with our professional team highly competent and approachable at all times. We follow specific requests and instructions carefully and apply advanced solutions based on the specific needs of each project. Gravity Die Casting Also known as mold casting, gravity die casting is well suited for medium to high-volume products. Gravity die casting offers faster production times, consistent product quality, and lower tooling set up costs. Advantages of Mold Making with Dingtian Our approach to mold making leaves nothing to chance. Along with investing heavily in advanced machinery and expert staff, we continue to focus on client support and communication. From design and prototyping through to production, our expert team is there to advise you from start to finish. With decades of experience in the industry, we know how to create consistent solutions. We have our own dedicated mold shop (no out-sourcing) and access to the best equipment in the business. If you`re looking for a comprehensive, one-stop mold making or casting service, Dingtian is the right solution. Interested in our Mold Making Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

Dingtian Stainless Steel specializes in advanced and custom stainless steel castings for demanding industries. Our stainless steel precision casting process is superior; we offer state-of-the-art CNC machining and deliver industry-leading dimensional accuracy and tolerances across sectors and stainless steel alloys. Our metal casting foundry has the ability to work with a variety of stainless steel investment casts, delivering high strength and corrosion resistant parts. Our stainless steel investment casting services have been used for transportation, firearms, electrical, tool industry projects, and more. We`ve been perfecting our methods for decades, and we are one of the most trusted stainless steel precision casting foundries in the industry. At Dingtian Stainless Steel, we will deliver accurate cost and time estimates for your stainless steel project. Our expert team will help you outline project goals, design specs, and take care of all of the manufacturing logistics to give you accurate lead times and the highest quality product. Our in-house heat treatment and machining services are available to deliver parts for superior performance-specific applications. If your project requires corrosion resistance, heat resistance, or falls outside the scope of common stainless steels, we are your go-to foundry. Interested in our Steel Casting Services? Request a Quote Jiangsu Dingtian Stainless Steel Products Co., Ltd. Add: Chenqi Village, Dainan Town, Xinghua City, Taizhou, Jiangsu, China. Postal Code: 225721 Phone: 0086-18921721675 Whatsapp: +86 18921721675 Wechat: 18921721675 Website: www.dingtiancasting.com

At present, there are many mature technologies and processes in stainless steel precision casting. Silica sol shell process. The silica sol shell-making process is widely used in the more advanced foundry industry of internal combustion engine parts. The coating used in this method has good stability, does not require a chemical hardening process, is resistant to high temperature, and has better resistance to deformation. However, the disadvantage of this technology is that the wettability of the wax mold is poor. Although it can be improved by adding surfactants, it will increase the investment to a certain extent. Water glass shell process. The water glass shell process was invented very early, and my country also introduced this technology from the Soviet Union in the 1950s and 1960s. The technology has low cost, relatively simple operation, and low requirements on raw materials, so it is widely used in stainless steel precision casting. However, the biggest problem of this technology compared to the silica sol shell making process is that the surface quality of the resulting castings is general and the dimensional accuracy is low. However, due to its cost advantage, my country still uses this technology in some civilian or low-precision internal combustion engines. Since the introduction of this technology, Chinese researchers have made great improvements to it, mainly in the aspects of improving shell coatings, optimizing hardeners, and using composite shells.

The stainless steel precision casting industry is different from the traditional casting industry. Although my country is a big casting country, precision casting is still in the development stage, and there is still a big gap with developed countries. In recent years, my country has vigorously promoted industrialization, and the level of science and technology has been continuously improved. There are already some relatively mature technical means in precision casting. At the same time, my country's demand for precision casting products is also increasing. Therefore, precision casting (especially stainless steel precision casting) will have a broad space for development in my country. Stainless steel investment casting is also called investment casting. This process minimizes or does not cut at all in the casting process. It is a casting process with little or no cutting, and is an excellent process technology in the casting industry. Its application range is very wide, not only suitable for casting of various types and alloys, but also produces castings with higher dimensional accuracy and surface quality than other casting methods. At the same time, investment casting can be used for castings that are resistant to high temperatures and are not easy to process. Since this casting method is not in an ultra-high temperature state during the casting process, it is more suitable for casting components of high-precision industries such as aerospace and national defense.

The main contents of investment casting cleaning are: (1) remove the shell from the casting; (2) remove the casting from the self-pouring system; (3) remove the shell refractory material adhered to the casting; (4) the casting Cleaning after heat treatment, such as descaling, edge and cutting gate residues, etc. Investment casting process design Like general casting process design, the tasks of investment casting process design are: (1) Analyze the manufacturability of the casting structure; (2) Select a reasonable process plan, determine the relevant casting process parameters, and draw the casting diagram on the basis of the above; (3) Design the pouring system and determine the module structure. When considering the above three aspects, the main basis is still the basic principles of the general casting process, especially when determining the process plan and process parameters (such as casting fillet, draft angle, machining allowance, process ribs, etc.), Except the specific data is slightly different due to the technological characteristics of investment casting, the design principle is exactly the same as that of sand casting.

With the continuous development and improvement of my country's economic level, the market of the precision casting industry has also been more and more advanced, and the technical level has also been continuously improved. Gradually open up foreign markets, so that my country's precision casting industry occupies a certain position in the world. In order to make my country's precision casting industry more quickly integrate into the world trade integration, and effectively improve the design and manufacturing level of casting molds, it is a necessary condition for integration into international integration. Which aspects should be improved, mainly include the following three points: 1. Continuously improve the technical level of designing and manufacturing large, precise, complex and long-life molds; 2. Continuously improve the integration level of process and tooling design; 3. Continuously improve surface treatment technology, develop high-speed processing technology, improve the standardization level of casting molds and expand the scope of use of standard parts.

Investment casting refers to a fusible model made of fusible materials, coated with several layers of special refractory coatings, dried and hardened to form an integral shell, and then steam or hot water is used to remove the mold from the shell. Melt out the model, then put the mold shell in the sand box, fill it with dry sand molding around it, and finally put the mold into the roasting furnace for high temperature roasting, after the casting mold or shell is roasted, pour molten metal in it Get castings. The products obtained by investment casting are precise and complex, close to the final shape of the parts, and can be used directly without processing or with little processing. The application is very wide. It is not only suitable for casting of various types and alloys, but also produces castings with higher dimensional accuracy and surface quality than other casting methods, and even complex, high temperature resistant and difficult to process castings that are difficult to be cast by other casting methods. All can be cast by investment casting. From the analysis of the development situation, the application of investment casting technology is very extensive, and its future development prospects are expected to be broad.

In general, the dimensional accuracy of precision castings is affected by many factors such as casting structure, casting material, mold making, shell making, roasting, pouring, etc. Any one of the link settings and unreasonable operation will change the shrinkage rate of the casting. Lead to the deviation of casting dimensional accuracy and requirements. The following are factors that can cause dimensional accuracy defects in precision castings: (1) The influence of the structure of the casting: a. The wall thickness of the casting has a large shrinkage rate, and the casting wall is thin and the shrinkage rate is small. b. The free shrinkage rate is large, and the hindered shrinkage rate is small. (2) Influence of shell-making materials: The use of zircon sand, zircon powder, Shangdian sand, and Shangdian powder has a small expansion coefficient of only 4.6×10-6/℃, so it can be ignored. (3) Influence of shell roasting: Due to the small expansion coefficient of the shell, when the shell temperature is 1150 °C, it is only 0.053%, so it can also be ignored. (4) Effect of casting temperature: The higher the casting temperature, the greater the shrinkage rate, the lower the casting temperature, the smaller the shrinkage rate, so the casting temperature should be appropriate.

In order to promote the development of the foundry industry, the scale of precision casting enterprises should be within a reasonable range. It is proposed in the "Twelfth Five-Year" Development Plan of my country's Precision Casting Industry that by 2015, the number of precision casting enterprises will be reduced from 30,000 to about 20,000, and by 2020 to about 10,000. Foundry energy consumption, 30% of the enterprises have reached the level of developed industrialized countries; the waste and exhaust gas emissions of foundry enterprises have reached the national or local standards; on the basis of the "Eleventh Five-Year Plan", the energy saving and emission reduction targets have reached a 10% reduction in energy consumption and a 15% reduction in pollutant emissions. %, implement the "Access Conditions for my country's Precision Casting Industry", and close down enterprises that waste resources, pollute the environment and do not have the conditions for safe production. Compared with developed countries, my country's precision casting technology has many factories, many employees and large output. Compared with developed countries, there are gaps in quality, efficiency, energy and material consumption, labor conditions and environmental protection. It is reported that the development of precision casting technology in industrialized countries in the world can be summarized into four goals. my country's precision casting industry should also approach these four aspects: 1. Improve the quality and reliability of castings, and produce high-quality near-net shape Castings; 2. Shorten the delivery time; 3. Protect the environment, reduce or even eliminate pollution; 4. Reduce production costs. my country's precision casting has not been able to achieve these goals. To make my country's precision casting industry reach the world's advanced level, we must proceed from the reality of our country to promote the development of the precision casting industry as soon as possible.

Precision casting is the leader of the world's foundry industry. As a representative of the foundry industry in the high-tech field, precision casting must play its exemplary role and leading role. However, the premise of precision casting to play these two roles is to strengthen itself. Therefore, my country's Precision casting should be developed first, and development requires established policies and development goals. The development goals of the precision casting industry are as follows: First, complete the transformation from labor- and resource-intensive to technology-capital-intensive, and from extensive pollution to green-intensive growth mode. The quality, variety, and quantity of products are comparable to the world's advanced level, and the proportion of high-quality materials is rapid. With the increase, the production efficiency and economic benefits of the entire precision casting factory have doubled; environmental pollution has been effectively controlled, and a Chinese foundry material industry system that is in harmony with the environment has been initially established. Second, to form some R&D and education training bases with reasonable structure and high overall level that combine production, education and research, which can continuously deliver professional talents to enterprises, and continuously develop new varieties of high-quality and high-grade casting materials to meet the growing demand for casting materials. At the same time, gradually increase the intensity of technology export. Third, to complete the adjustment of the industrial structure, eliminate a number of small precision casting factories with low technical level, poor product quality, serious pollution and poor economic benefits, and form relatively concentrated "small giants" and "star enterprises" to achieve "professional" large-scale production. In particular, one or two backbone enterprises that can compete with world-renowned enterprises should emerge. They have high technical level, sophisticated technology and equipment, abundant capital and advanced management level, and can continuously provide high-end and high-quality casting materials to the market. high rate. If the precision casting industry can achieve the above development goals and strengthen itself, then the precision casting industry will be able to play its pioneering model and leading role in the foundry industry and drive the development of the foundry industry.

Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the part, and can be used directly without processing or with little processing. Therefore, investment casting is an advanced process with near-net shape. Ancient my country: Prince Wuding, Bronze Ban, Bronze Lion, etc. are all masterpieces of investment casting. Since investment casting was used in industrial production in the 1940s, it has been developing at a rapid rate for half a century. In particular, European and American countries are developing rapidly. Investment casting is used in almost all industrial sectors, especially in electronics, petroleum, chemical, energy, transportation, light industry, textiles, pharmaceuticals, medical equipment, pumps and valves. In recent years, my country has developed rapidly. The development of investment technology enables investment casting to produce not only small castings, but also larger castings. The outline size of the largest investment casting is nearly 2m, while the minimum wall thickness is less than 2mm. At the same time, investment castings are also becoming more precise. In addition to linear tolerances, parts can also achieve higher geometric tolerances. The surface roughness of investment castings is also getting smaller and smaller, which can reach Ra0.4μm.