1、Runnerless injection mold
Runnerless injection mold 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 when the mold is opened and the plastic part is removed, there is no condensation of the pouring system. The former is called adiabatic runner injection mold, and the latter is called hot runner injection mold.
2、Injection mold with movable molding parts
Due to the special structure of the plastic moulding supplies, the injection mold is required to set movable molding parts, such as movable convex mold, movable concave mold, movable insert, movable threaded core or ring, etc., which can be moved out of the mold together with the plastic parts during demolding, and then separated from the plastic parts.
3、Automatic unloading of threaded injection mold
For plastic parts with threads, when automatic unmolding is required, a threaded core or ring that can be rotated can be set on the mold, and the mold opening action or the rotating mechanism of the injection molding machine, or a special transmission device can be set to drive the threaded core or ring to rotate, so as to unmold the plastic parts.
4、Right-angle injection mold
The right angle type injection mold is only applicable to the angle type injection molding machine, which is very different from other injection molds in that the direction of feeding material is perpendicular to the opening and closing direction. The main flow channel is opened 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 other molds for injection molding machines.
5、Injection mold with the release mechanism on the fixed mold
In most of the injection molding supplies, the release mechanism is installed on the dynamic side of the mold, which is conducive to the work of the ejector device in the injection molding machine opening and closing system. In the actual production, some parts are restricted by the shape, so it is better to leave the parts on the fixed side of the mold, and in order to release the parts from the mold, the release mechanism must be installed on the fixed side of the mold.
6、Single parting surface injection mold
When the mold is opened, the movable mold and the fixed mold are separated, so as to take out the plastic parts, which is called single parting surface mold, also called double plate mold. It is the simplest and most basic form of injection mold, which can be designed as single cavity injection mold or multi-cavity injection mold according to the need, and it is the most widely used injection mold.
7、Double parting surface injection mold
Compared with single parting surface injection mold, double shot moulding has an intermediate plate that can be partially moved in the fixed part of the mold, so it is also called three-plate injection mold, which is often used for single-cavity or multi-cavity injection mold with point gate feeding. The mold can be opened with the intermediate plate on the guide column of the fixed mold at a fixed distance from the fixed mold plate, so that the casting material can be taken out between the two plates. Double parting surface injection mold structure is complicated, manufacturing cost is high, parts processing is difficult, generally not used for large or very large plastic products molding.
8、Injection mold with lateral parting and core extraction mechanism
When the plastic part has side holes or side concave, it needs to use the core or slider that can be moved laterally. After injection molding, the moving mold first moves downward for a distance, and then the beveled section of the bent pin fixed on the fixed mold plate forces the slider to move outward, while the push rod of the mold release mechanism pushes the pushing plate to make the molded part come off from the core.
