The utility model relates to a combined plastic mold for pressing, extruding, injection molding, blow molding and low foaming molding, which mainly comprises a die with a variable cavity composed of a die combination base plate, a die component and a die combination card, and a die with a variable core composed of a die combination base plate, a die component, a die combination card, a cavity cutting component and a side cutting combination plate. Coordinate change of punch, die and auxiliary forming system. It can process series plastic parts of different shapes and sizes. Plastic processing industry and plastic molding machine matching, giving plastic products with complete configuration and accurate size tools. Because there are many kinds of plastics and processing methods, and the structures of plastic molding machines and plastic products are different, the types and structures of plastic molds are also diverse.
With the rapid development of plastic industry and the continuous improvement of the strength of general and engineering plastics, the application scope of plastic products is also expanding, and the amount of plastic products is also increasing.
Plastic mold is a tool for producing plastic products. It consists of several groups of parts, which have a molding cavity. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, cooled and shaped in the cavity, then the upper and lower molds are separated, the products are ejected from the mold cavity through the ejection system, and finally the mold is closed for the next injection, the whole injection process is cyclic.
Generally, the plastic mold consists of two parts: the moving mold and the 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 the injection molding, the movable mold and the fixed mold are closed to form the pouring system and the mold cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic products.
Although the structure of the mold may vary greatly due to the variety and performance of the plastic, the shape and structure of the plastic products and the type of the injection machine, the basic structure is the same. The mold is mainly composed of pouring system, temperature regulating system, forming parts and structural parts. The pouring system and molding parts are the parts which are in direct contact with the plastics and change with the plastics and products. They are the most complex and changeable parts in the plastic mold, which require the highest processing finish and precision.
The pouring system refers to the part of the flow channel before the plastic enters the cavity from the nozzle, including the main flow channel, the cold material hole, the shunt channel and the gate, etc. Forming parts refer to all kinds of parts forming the shape of products, including moving die, fixed die and cavity, core, forming rod and exhaust port.
Driven by high technology and the demand for application of pillar industries, China's plastic molds have formed a huge industrial chain. From the upstream raw and auxiliary materials industry and processing and testing equipment to the downstream machinery, automobiles, motorcycles, home appliances, electronic communications, building materials and other application industries, the development of plastic molds is full of vitality.
