Injection mold is a tool for producing plastic products; It is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of complex shaped components. Specifically, it refers to injecting the melted plastic into the mold cavity under high pressure from an injection molding machine, cooling and solidifying it to obtain the formed product.
Although the structure of the mold may vary greatly due to differences in plastic varieties and properties, the shape and structure of plastic products, and the type of injection machine, the basic structure is consistent. The mold mainly consists of a pouring system, a temperature regulating system, formed parts, and structural parts. The pouring system and molding parts are the parts that come into direct contact with plastic and change with plastic and products. They are the most complex and variable parts in plastic molds, requiring the highest processing smoothness and accuracy.
The injection mold consists of two parts: a moving mold and a fixed mold. The moving mold is installed on the moving template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable and fixed molds are closed to form a pouring system and cavity. During mold opening, the movable and fixed molds are separated to facilitate the removal of plastic products. In order to reduce the heavy workload of mold design and manufacturing, injection molds mostly use standard mold bases.
Injection mold is an important process equipment for producing various industrial products. With the rapid development of the plastic industry and the promotion and application of plastic products in industries such as aviation, aerospace, electronics, machinery, shipbuilding, and automobiles, the requirements for molds in products are becoming increasingly high. Traditional mold design methods can no longer meet today's requirements Compared with traditional mold design, computer-aided engineering (CAE) technology has great advantages in improving productivity, ensuring product quality, and reducing costs and labor intensity.
In the processing of injection molds, various CNC machining methods are useful, with the most commonly used being CNC milling and machining centers. CNC wire cutting and CNC electric discharge machining are also widely used in mold CNC machining. Wire cutting is mainly used in various straight wall mold processing, such as concave and convex molds in stamping, inserts and sliders in injection molds, and electrodes for electric discharge machining. For mold parts with high hardness, machining methods cannot be used, and most of them use electric discharge machining. In addition, electric discharge machining is also used for sharp corners, deep cavity parts, narrow grooves, etc. of the mold cavity. CNC lathes are mainly used for processing standard parts such as mold rods, as well as mold cavities or cores of rotating bodies, such as injection molds for bottle bodies and pots, and forging molds for shaft and disc parts. In mold processing, the application of CNC drilling machines can also play a role in improving machining accuracy and shortening machining cycles.
Moulds are widely used, and in modern manufacturing, the forming and processing of product components almost all require the use of molds to complete. Therefore, the mold industry is an important component of the national high-tech industry and an important and valuable technological resource. Optimize the structural design of the mold system and the CAD/CAE/CAM of the mold, and make it more intelligent, improve the forming and processing technology of the mold and the standardization level of the mold, improve the precision and quality of the mold manufacturing, reduce the amount of surface grinding and polishing operations and manufacturing cycle of the mold; Research and apply high-performance, easy to cut specialized materials for various types of mold parts to improve the performance of the mold; In order to adapt to market diversification and new product trial production, the application of rapid prototyping manufacturing technology and rapid molding technology to rapidly manufacture stamping molds, plastic injection molds, or die-casting molds should be the development trend of mold production technology in the next 5-20 years
