Classification of injection molds

-Single parting surface of injection mold.

When the mold is opened, the movable mold is separated from the fixed mold, and the plastic part can be taken out. It is called a single parting surface mold, also called a double plate type. The injection mold is a simple and basic form of injection molds. It can be designed as a single-cavity injection mold or a multi-cavity injection mold as required. It is a widely used injection mold.

-Double parting surface injection mold.

The two parting surface injection mold has two parting surfaces. Compared with the single parting surface injection mold, the double parting surface injection mold adds a partially movable intermediate plate in the fixed mold part (also known as the movable gate plate). It is equipped with gates, runners and other parts and components required by the fixed mold), so it is also called three-plate (moving plate, intermediate plate, fixed plate) injection mold, which is often used for single cavity with point gate feeding Or multi-cavity injection mold.

The two-part injection mold has a complex structure, high manufacturing cost, and difficult parts processing. Generally, large or super large plastic products are not formed.

-The injection mold has a horizontal parting and core pulling mechanism.

If the plastic part has side holes or undercuts, it is necessary to use a laterally movable core or slider for molding. After injection molding , the movable mold first moves down for a certain distance, and then is fixed to the inclined surface of the bending pin on the fixed template, forcing the slider to move outward, and the push rod of the demolding mechanism pushes and pulls the plastic part to move down from the core.

-Injection molds with movable molded parts.

Because of the special structure of plastic products, they can be moved out of the mold together with the plastic part and separated from the plastic part when demolding, such as: movable punch, movable die, movable insert, movable thread core, etc.

-Automatic unloading of injection molds.

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 thread can be driven by the mold opening action or the rotation mechanism of the injection molding machine, or a special transmission device The molding ring rotates to make the plastic part come out.

-No fluid injection mold.

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

-Right angle injection mold.

Bevel injection moulds are only suitable for angle injection moulding machines. Different from other injection moulding machines, the feeding direction of this kind of mould is perpendicular to the opening and closing direction of the mould during forming. The main flow guide channel is set on both sides of the moving and fixed molds, and its cross-sectional area is generally constant. This is different from the molds used in other injection molding machines. Deformed, replaceable runner inserts can be set.

-The injection mold of the demolding mechanism on the forming mold.

The demolding devices of most injection molds are installed on the side of the movable mold, which facilitates the work of the ejector device of the mold opening system of the injection molding machine. In practice, because some plastic parts are limited by the shape, the plastic parts are left on the side of the fixed mold, which slightly improves the molding effect, so that the plastic parts are separated from the mold. A demolding mechanism should be set on the side of the fixed mold.