What are the differences between casting molds and plastic part molds?
Source:本站 Time:2019/6/19 11:11:13 frequency:
Casting refers to the manufacturing of molds, including casting, cooling, grinding, and forging. casting mold It refers to the process of using other easily moldable materials to create the structural shape of a component in advance, and then placing it into a mold in a sand mold. This creates a cavity in the sand mold that is the same size as the component structure, and then pouring a flowing liquid into the cavity. After the liquid cools and solidifies, it can form a component with the same shape and structure as the mold. Plastic mold is one of the types of plastic products, including blow molding (used plastic bags), extrusion (plates, strips), etc. Casting molds pre manufacture the structural shape of parts using other easily formable materials, and then place the mold into a sand mold to obtain the structural shape of the parts, thereby forming a cavity of the same size in the sand mold and pouring liquid into the hole. After cooling and solidification, the liquid can form zero, with a shape and structure identical to the mold. That's it. Casting molds refer to metal models, such as aluminum and iron models, typically used to obtain qualified part models, such as common manual models, wood models, plastic models, and mechanical models. Wax models for precision casting and polystyrene models for EPC. Casting molds pre manufacture the structural shape of parts using other easily formable materials, and then place the mold into a sand mold to obtain the structural shape of the parts, thereby forming a cavity of the same size in the sand mold and pouring liquid into the hole. After cooling and solidification, the liquid can form zero, with a shape and structure identical to the mold. That's it. The casting mold is driven by the pressure nozzle of the hydraulic cylinder, which presses liquid metal into the mold cavity at high speed. Due to high pressure and oil pressure, it is commonly known as casting mold technology. Plastic molds are a type of tool used in the plastic processing industry and plastic molding machines. It provides plastic products with a complete structure and accurate dimensions. Due to the different types and processing methods of plastics, as well as the different structures of plastic machines and plastic products, the types and structures of plastic machines are also different. According to different molding methods, plastic processing molds can be divided into different types, including injection molds, extrusion molds, plastic molds, high expansion polystyrene molds, etc. Plastic injection mold It is a mold widely used in the production of thermoplastic parts. The processing equipment for injection molds is injection molding machines. The plastic is first heated and melted in the heating bathtub at the bottom of the injection mold. Then, driven by the screws or plungers of the injection mold, the injection mold is cooled and hardened through the injection nozzle and injection mold casting system. This product is obtained through degreasing. The structure usually consists of molded parts, pouring system, guide rod, push rod mechanism, temperature control system, exhaust system, bracket components, etc. Plastic mold steel modules are commonly used for manufacturing materials. Common materials include carbon structural steel, carbon tool steel, alloy tool steel, high-speed steel, etc. The injection molding process is usually only applicable to the production of thermoplastic products. The plastic products produced by injection molding process are very extensive. Injection molding ranges from daily necessities to various complex mechanical, electrical, and transportation components. It is the most widely used processing method in the production of plastic products. 2. Plastic molds It includes compression and injection molding. They are mainly used to form thermosetting plastic molds, and the corresponding equipment is a pressure molding machine. According to the characteristics of plastic, the mold is heated to the molding temperature (usually 103-108 degrees). Then place the measured powder into the mold chamber and loading chamber to close the mold. Under high temperature and pressure, plastics have the characteristics of softening and viscous flow. After a period of time, the mold solidifies and becomes the ideal shape of the product. Unlike compression molding, injection molding has a separate feeding chamber. Before molding, the mold is closed and the plastic is preheated in a viscous flow state in the feeding chamber. Under pressure, adjust to the extrusion chamber and harden. Compression molds are also used to form special thermoplastics, such as thermoplastics (such as polyvinyl fluoride) blank (cold press), high optical resin lens and slightly foamed nitrocellulose steering wheel. The mold is mainly composed of a cavity, a supply cavity, a guiding mechanism, a pushing component, a heating system, etc. Injection molds are widely used in the packaging of electrical components. The manufacturing materials of compression molds are basically the same as those of injection molds.
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