What is the definition and production process of plasti […]
What is the definition and production process of plastic molds
A mold is a tool for producing plastic products. It is composed of several groups of parts, and there is a molding cavity in this combination. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is crate injection mould injected into the molding cavity, cooled and shaped in the cavity, and then the upper and lower molds are separated, and the product is ejected from the cavity and out of the mold through the ejection system, and finally the mold is closed For the next injection, the entire injection molding process is carried out cyclically.
The mold line is demolded together with the product when the mold is opened. The design is the simplest, easy to process, and low in cost, so more people use the large nozzle system to work.
Nozzle mold: runners and gates are not on the parting line, usually directly on the product, so it is necessary to design a group of nozzle parting lines, the design is more complicated, and the processing is more difficult. Generally, the nozzle system should be selected according to the product requirements. .
Hot runner mold: The structure of this type of mold is roughly the same as the nozzle. The biggest difference is that the runner is in one or more hot runner plates and hot nozzles with constant temperature. There is no cold material demoulding, and the runner and gate are directly in In terms of products, the runner does not need to be demolded. This system is also called a nozzleless system, which can save raw materials and is suitable for situations where raw materials are more expensive and products require higher requirements. Design and processing are difficult, and mold costs are higher.