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Basic composition of injection mold structure

 Tuesday, 31 August 2021

The structure of the mold is different from that of plastic products, and its structural design will be varied, but the basic structure is the same. 

The basic structure of injection mold is divided into seven parts according to its function:

1.Formed parts refer to the parts constituting the mold cavity, mainly including punch, concave die, core, forming rod, forming ring, insert and other parts.
2.Gating system, which refers to the plastic flow channel in the mold from the nozzle of the injection molding machine to the cavity. The common gating system is composed of main runner, shunt runner, gate, cold material cavity, etc.
3.Guiding mechanism, in the plastic mold, mainly has the functions of positioning, guiding and bearing a certain side pressure to ensure the accurate clamping of moving and fixed mold. The clamping guide mechanism is composed of guide post, guide sleeve or guide hole (directly opened on the template), positioning cone, etc.
4.The ejector device is mainly used to eject the parts from the mold. It is composed of ejector rod or pipe jacking or push plate, ejector plate, ejector rod fixing plate, reset rod and pull rod.
5.Lateral parting and core pulling mechanism, which is used to disengage the lateral punch or pull out the lateral core, usually including inclined guide column, bending pin, inclined guide groove, wedge block, inclined slider, inclined groove, gear rack and other parts.
6.Cooling and heating system, whose function is to adjust the mold process temperature, is composed of cooling system (cooling water hole, cooling water tank, copper pipe) or heating system.
7.The function of exhaust system is to exhaust the gas in the cavity, which is mainly composed of exhaust slot, matching gap, etc.

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