The nozzle of a plastic mold can also be called a gate, which refers to the joint between the frame and the part formed when the factory casts the model. It can be divided into a large nozzle and a small nozzle.
Plastic molds are divided into large nozzle molds, fine nozzle molds, and hot runner molds.
1）Large nozzle mold: The runner and gate are on the parting line, and the product is demolded together with the product when the mold is opened. The design is the simplest, easy to process, and low cost, so more people use the large nozzle system to work.
2）Fine nozzle mold: runners and gates are not on the parting line, generally 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 thinner should be selected according to the product requirements. Nozzle system.
3） Hot runner mold: The structure of this type of mold is roughly the same as that of 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, runners and gates. It is directly on the product, so 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 are demanding. Design and processing are difficult, and mold costs are high.
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