Injection Mold Tooling Classification for Injection Molding Machine

2022-03-09


Single parting surface injection mold tooling

When the mold is opened, the movable mold tooling and the fixed mold tooling are separated to get the plastic product, which is called a single parting surface plastic molding, also called a double-plate plastic molding. It is the simplest and most basic form of plastic injection molding. It can be designed as a single-cavity plastic injection molding or a multi-cavity plastic injection molding as need. It is the most widely used is plastic injection molding machine.

Double parting surface plastic injection molding

The double parting surface plastic injection molding has two parting surfaces. Compared with the single parting surface plastic injection molding, the double parting surface plastic mold injection of injection molding machine adds an intermediate plate (also called movable gate plate, which is equipped with gates, runners and other components required by the fixed mold tooling), so it is also called a three-plate (moving plate, intermediate plate, fixed plate) plastic mold injection, which is often used for single-type point gate feeding for plastic mold injection with single cavity or multiple cavities. When the tooling mold in injection molding machine is opened, the intermediate plate is separated at a fixed distance from the fixed template on the guide post, so that the casting system condensate can be taken out between the two templates. The double parting surface plastic mold injection of injection molding machine has complex structure, high manufacturing cost, and difficult parts processing. Generally, it is not used for the molding of large or super large plastic products.

Lateral parting and core pulling mechanism plastic mold injection

 When the plastic part has side holes or undercuts, it is necessary to use a laterally movable core or slider in injection molding machine. After injection plastic molding, the movable mold of injection molding machine first moves down for a certain distance, and then the inclined section of the bending pin fixes on the fixed template forcing the slider to move outward, and at the same time, the push rod of the demolding mechanism pushes the pusher plate to make the plastic part self-demolding off the core.

Movable parts molded injection plastic molding

Due to the special structure of plastic parts, the injection mold in injection molding machine is required to be equipped with movable forming parts, such as movable convex molds, movable concave molds, movable inserts, movable thread cores or rings, etc., which can be combined with the plastic parts during demolding, moving out of the mold together, and then separating from the plastic part.

Automatic thread unloading injection plastic molding

For plastic parts with threads, if automatic demolding is required from injection molding machine, a rotatable thread core or ring can be set on the China mold, so that the mold opening action or the rotation mechanism of the injection molding machine will be used, or a special transmission device will be set to drive the thread. The core or the threaded ring rotates, thereby releasing the plastic part.

Runnerless injection plastic molding

Runnerless injection plastic molding for injection molding machine refers to the method of adiabatic heating of the runner to keep the plastic between the nozzle and the cavity of the injection molding machine in a molten state, so that there is no condensate in the pouring system when the mold is opened and the plastic part is taken out. The former is called adiabatic runner China plastic injection mold, and the latter is called hot runner injection plastic molding.

Right-angle injection plastic molding

Right-angle injection plastic molding are only suitable for angle injection molding machines. The difference from other China plastic injection mold is that the feeding direction of mold type is perpendicular to the opening and closing direction of the mold and tooling during China plastic injection molding. His main channel is opened on both sides of the parting surface of the moving and fixed molds, and its cross-sectional area is usually constant. This is different from the molds used in other injection molding machines. For preventing the worn and deformation of the nozzle from China plastic injection mold machine and the main runner inlet end can be replaced with runner inserts.

 

Injection mold of fixed mold demolding mechanism

In most China plastic injection molds for injection molding machine region, the demolding device is installed on the side of the movable mold from injection molding machine, which facilitates the operation of the eject device in the opening and closing system of injection molding machine. In actual production, because some plastic injection mold parts are limited by the shape, it is better to leave the plastic part on the side of the fixed mold and tooling for molding. This makes the plastic part be demolded necessary to set a release on the side of the fixed mold and tooling.

 

 

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