What Are The Classifications Of Plastic Injection Molds?

When the one-piece plastic injection mold is opened, the movable mold and the fixed mold are separated, and then the plastic parts are taken out, which is called a one-piece mold, also known as a double-plate mold. It is a very simple and basic plastic injection mold. It can be designed as a single-cavity injection mold or a multi-cavity injection mold according to requirements. It is a widely used injection mold. Double-split plastic injection mold The double-split surface injection mold has two parting surfaces. Compared with the single-piece external injection mold, the double-split injection mold adds a partially movable center plate (also called an automatic gate plate, which is equipped with gates, slides and other components and fixed mold parts) to the fixed mold parts. Therefore, it is also called a three-plate (moving template, center plate, fixed template) injection mold, which is often used for spotting. When the mold is opened for single cavity or multi-cavity injection mold, the center plate is in the fixed column guide column The upper part is separated from the fixed plate by a certain distance, and then the pouring system aggregate is taken out between the two formworks. The two-component molding die has a complex structure, high manufacturing cost, and difficult parts processing. It is generally not used for molding large or extra-large plastic products.

Injection Molding with Lateral Partitioning and Core Pulling Mechanisms When a plastic part has side holes or undercuts, it is necessary to form a core or slide that can move laterally. After injection molding, the movable mold is first moved down for a certain distance, and then the skewed part of the curved pin fixed on the fixed template forces the slider to move outward, and the push rod of the demoulding organization pushes the push plate to make the plastic part self-molding and take off the core . Injection molding with active molded parts requires movable mold parts such as movable punches, movable molds, movable inserts, movable thread cores or rings due to some special structures of plastic parts. When demoulding, the mold can be combined with the plastic part and then separated from the plastic part. Plastic injection mold for automatic unloading of threaded plastic parts. When automatic demoulding is required, a rotatable threaded core or ring can be placed on the mold using the mold opening action or the rotary mechanism of the injection molding machine, or a special transmission can be set to drive the threaded core or threaded ring to rotate and release the plastic part.

The non-motion injection molding method refers to the method of adiabatic heating by using a pair of moving channels, and the plastic between the cavities of the nozzles of the injection molding machine remains in a molten state, and then the mold is taken out when the mold is not dumped. The former is called adiabatic runner injection mold, and the latter is called hot runner injection mold. Right Angle Plastic Injection Molds Right Angle Injection Molds are only suitable for view point injection molding machines. Unlike other injection molds, the feeding direction is perpendicular to the direction of mold opening and closing. His main flow path is located on both sides of the parting surface of the moving and fixed molds, and its cross-sectional area is usually constant, which is different from the molds used in other injection molding machines. The end of the mainstream road is to avoid injection molding machines. The inlet ports of the nozzles and stem flow path are worn and deformed, and replacement active channel inserts can be supplied. The injection mold of the demoulding mechanism on the fixed mold In most injection molds, the demoulding device is installed on the side of the movable mold, which is conducive to the operation of the pop-up device in the opening and closing mold system. injection molding machine. In actual production, because some plastic parts are limited by the shape, it is better to place the plastic parts on the side of the fixed mold so that the plastic parts can be taken out of the mold, and it is necessary to provide a demoulding mechanism on one side of the fixed mold.

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