Plastic mold, electronic products, injection mold about the classification of what
The general classification of injection moulds for electronic products covers a wide range of shapes and classification methods. According to the equipment of injection molding machine, it can be divided into mobile mold (only vertical injection machine) and fixed injection mold. According to the type of needle syringe used, can be divided into horizontal or vertical needle syringe injection mold and angle needle syringe injection mold. In addition, according to the different characteristics of the mold, the mold cavity can be divided into the number of single cavity cavity and multi-cavity injection mold. According to the size of molding products can be divided into large, medium and small injection mold. According to the overall structural characteristics of the injection mold, it can be divided into a single parting surface injection mold, also known as two (double) plate injection mold, is a common standard structural mode, in which the component part of the cavity is located in the dynamic mold, the rest is inside the mould. A single parting surface injection mold used in horizontal or vertical injection machines usually has a main runner on one side of the mold and a runner on the parting surface where the product and runner are held together, turn over and leave on the side of the mold. A ejection device is arranged on the die for ejecting the product and the flow channel condensate. The die has simple structure and reliable operation, and is especially suitable for the production of large box and shell products
The injection mould for electronic products with double parting face is to separate the casting system from the product through different parting face (also called three-plate injection mould) . Compared with the single parting face mold, the double parting face mold has the movable center plate (also called gate plate) . The die consists of a fixed runner plate, which comprises a runner or a cavity position arranged on the center plate and a moving template with a component such as an ejector element and a core. When a plastic mold manufacturer begins production, the center plate is separated from the fixed and moving plates, and the cooling material for the product and feed system is removed from both sides of the center plate. Therefore, the injection mould has two parallel parting surfaces. If the product has a side hole or a side recess, the active die will have a side core pulling mechanism, such as a diagonal bar or diagonal slider. When the mould starts, the side core is moved sideways by the opening force to separate the side core from the product. In addition, a cylinder or a cylinder can be installed on the die to drive the side core through the lateral core pulling
Injection mold is widely used in the production of plastic products because it can form many plastic parts with complex structure, precise size and good internal quality. However, the design and manufacture process of injection mold is very complex, and there are many factors affected. In the production of plastic mold manufacturers, concrete component mold, section bridge shoulder plate mold, well grate mold is also a common type. The gating system is an important part in the structure design of injection mold, and it is also the channel for the plastic melt to enter the mold cavity. The design of the geometry and structure size of the gating system directly affects the rheological behavior and filling effect of the polymer melt in the mold channel, and finally affects the molding quality of the plastic parts. The production practice shows that many defects, such as jet flow, warpage, Weld line and under-injection, are closely related to the design of gating system.