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Different kinds of plastic injection molds

1. Injection mold with single parting surface
When opening the mold, the moving mold and the fixed mold are separated to take out the plastic parts, which is called single parting surface mold, also known as double plate mold. It is the simplest and most basic form of injection mold. It can be designed into single cavity injection mold or multi cavity injection mold according to needs. It is the most widely used injection mold.

2. Double parting surface injection mold
The double parting surface injection mold has two parting surfaces. Compared with the single parting surface injection mold, the double parting surface injection mold adds a locally movable intermediate plate (also known as movable gate plate, which is equipped with gate, flow channel and other parts and components required by the fixed mold), so it is also called three plate (moving template, intermediate plate and fixed template) injection mold;
It is commonly used in single cavity or multi cavity injection mold fed by point gate. During mold opening, the intermediate plate is separated from the fixed template at a fixed distance on the guide column of the fixed template, so as to take out the condensate of the gating system between the two templates. The double parting surface injection mold has complex structure, high manufacturing cost and difficult parts processing. It is generally not used for the molding of large or extra large plastic products.

3. Injection mold with lateral parting and core pulling mechanism
When the plastic part has a side hole or side recess, it needs to be formed with a laterally movable core or slider. After injection molding, the moving die first moves downward for a certain distance, and then the inclined section of the bending pin fixed on the fixed template forces the slider to move outward. At the same time, the push rod of the demoulding mechanism pushes the push plate to make the plastic part take off from the core.

4. Injection mold with movable forming parts
Due to some special structures of plastic parts, the injection mold is required to set movable forming parts, such as movable punch, movable female die, movable insert, movable thread core or ring, which can be removed from the mold together with the plastic parts during demoulding, and then separated from the plastic parts.

5. Automatic thread unloading injection mold
For plastic parts with threads, when automatic demoulding is required, a rotatable thread core or ring can be set on the mold, and the thread core or ring can be driven to rotate by using the mold opening action or the rotating mechanism of the injection molding machine, or a special transmission device can be set to drive the thread core or ring to rotate, so as to get rid of the plastic parts.

6. Injection mold without runner
The non runner injection mold refers to the method of adiabatic heating through the convection channel to keep the plastic between the nozzle and the mold cavity of the injection molding machine in a molten state, so that there is no solidification of the gating system when the plastic parts are taken out. The former is called adiabatic channel injection mold, and the latter is called hot channel injection mold.

7. Right angle injection mold
The right angle injection mold is only applicable to the angle injection molding machine. Different from other injection molds, the feeding direction of this kind of mold is perpendicular to the opening and closing direction.
Its main channel is set on both sides of the parting surface of the moving and fixed mold, and its cross-sectional area is usually unchanged, which is different from the molds used in other injection molding machines. At the end of the main channel, in order to prevent the wear and deformation of the nozzle of the injection molding machine and the inlet end of the main channel, replaceable channel inserts can be set.


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