Injection molding is a relatively common manufacturing method of industrial products in machining processing. This processing technology obtains the required shape by processing rubber and plastic. There are many types of injection mold processing. In the process of processing, the processing technology should be selected according to the requirements of the injection product.
1. Single parting surface injection mold
When the mold is opened, the movable mold and the fixed mold are separated, so that the plastic part is taken out, which is called a single parting surface mold. This processing method is the simplest of the plastic injection mold and molding. It can be divided into single-cavity injection molds or multi-cavity injection molds according to the design. It is widely used in today's production.
2. Double parting surface injection mold
Double parting surface injection molding has two parting surfaces. Compared with single parting surface injection molds, double parting surface injection molds have a movable intermediate plate in the fixed mold part, so this type of injection mold is called three-plate injection mold. It is most commonly used for single-cavity or multi-cavity molds with point gate feeding.
3. Injection mold with lateral parting and core pulling mechanism
When the plastic part has a side hole or a side depression, it needs to be formed with a core or slider that can move laterally. After injection molding, the movable mold will move down for a certain distance, and then the inclined surface of the bending pin fixed on the fixed template forces the slider to move outwards. At this time, the push rod of the ejection mechanism pushes the plastic part to take off from the core.
4. Injection mold with movable forming parts
Due to some special structures of plastic parts, injection molding will be required to be set into movable molding parts, such as movable punches, dies, movable inserts, movable threaded cores or shaped rings. During demolding, it can be moved out of the mold together with the plastic part and separated from the plastic part.
5. Automatic thread unloading injection mold
For plastic parts with threads, when automatic demolding is required, a freely rotatable thread core or ring can be set on the mold, and the mold opening action or the rotation mechanism of the injection molding machine can be used to drive the thread core or the threaded ring rotates and the plastic part comes out.
6. 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 there is no condensate in the pouring system when the mold is opened and the plastic part is taken out.
7. The injection mold of the demoulding mechanism on the fixed mold
In the injection mold, the demolding device is installed on the side of the movable mold, which is of great help to the ejector device in the opening and closing system of the injection molding machine. In actual production, because of the shape limitation of some plastic parts, leaving the plastic parts on the side of the fixed mold is more helpful for forming.