In the plastic processing industry, injection molding molds are tools that are used in conjunction with plastic molding machines to give plastic products a complete configuration and precise dimensions. It can be classified into different types of molds based on the various molding methods. Plastic particles are liquefied at high temperatures and filled into the mold cavity by coordinating various systems or auxiliary mechanisms in the mold to produce tools for industrial parts with specific shapes, sizes, functions, and quality. Plastic injection mold and molding are commonly classified into the following categories:
Ⅰ. Single parting surface injection molding mold
When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic part, which is called a single parting surface mold, also called a double-plate mold. It is the simplest and most basic form of injection molding molds. It can be designed as a single-cavity injection molding mold or a multi-cavity injection molding mold according to needs. It is the most widely used plastic injection mold and molding.
Ⅱ. Double parting surface injection molding mold
The plastic injection mold and molding with a double parting surface have two parting surfaces. When compared to a single parting surface injection molding mold, a double parting surface injection molding mold adds an intermediate plate (also known as a movable gate plate, it is equipped with gates, runners, and other parts and components required by the fixed mold), so it is also known as a three-plate (moving plate, intermediate plate, fixed plate) injection molding mold, which is frequently used for single-type point gate feeding. When the mold is opened for injection molding molds with multiple cavities or multiple cavities, the intermediate plate is separated from the fixed template at a fixed distance on the guidepost of the fixed mold, allowing the casting system to condensate to be taken out between the two templates.
The double parting surface plastic injection mold and molding have a complex structure, high manufacturing cost, and difficult parts processing. Generally, it is not used for the molding of large or super large plastic products.
Ⅲ. Injection molding mold with lateral parting and core pulling mechanism
When the plastic part has side holes or undercuts, it is necessary to use a core or slider that can move laterally. After injection molding mold, the movable mold first moves down for a certain distance, and then the inclined section of the bending pin fixed on the fixed template forces 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-molding Take off the core.
Ⅳ. Injection molding mold with movable forming parts
Due to the special structure of plastic parts, the injection mold is required to be equipped with movable molding parts, such as movable punches, movable concave molds, movable inserts, movable thread cores, or rings, etc., which can be combined with the plastic parts during demolding. Move out of the mold together, and then separate from the plastic part.
Ⅴ. Automatic thread unloading injection molding mold
When automatic demolding is required for plastic parts with threads, a rotatable thread core or ring can be set on the injection mold and driven by the mold opening action or the rotation mechanism of the injection molding machine. The threaded core or threaded ring rotates, causing the plastic part to be extracted.
When automatic demolding of plastic parts with threads is required, a rotatable thread core or ring can be set on the injection mold and driven by the mold opening action or the injection molding machine's rotation mechanism. The plastic part is extracted when the threaded core or threaded ring rotates.
Ⅵ. Injection molding mold with no runner
The term "runnerless injection molding mold" refers to the method of adiabatic heating of the runner to keep the plastic between the nozzle and the cavity of the plastic injection mold and molding machine molten, resulting in no condensate in the pouring system when the mold is opened and the plastic part is removed. The former is an adiabatic runner injection mold, while the latter is known as a hot runner injection mold.
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