Plastic mold can be divided into three types according to different gating system

1. Hot runner mold: the structure of this kind of mold is basically the same as that of the fine nozzle. The great difference is that the runner is located in one or more thermostatic hot runner plates and hot pumps, and there is no cold material demoulding. The runner and gate are directly on the product, so the runner does not need demoulding. This system is also known as the no nozzle system, which can save raw materials and is suitable for the production of expensive raw materials In the case of high requirements for products, it is difficult to design and process, and the cost of mould is high.

2. Big water mouth mold: the runner and gate are on the parting line, demoulding together with the product when the mold is opened. The design is quite simple, easy to process and low cost. So many people use the big water mouth system to work.

3. Fine nozzle mold: the runner and gate are not on the parting line, generally directly on the product, so it is more complex to design more sets of nozzle parting line, and the processing is more difficult. Generally, the fine nozzle system should be selected according to the product requirements.