The injection mold is mainly composed of a pouring sy […]
The injection mold is mainly composed of a pouring system, a temperature control system, molding parts and structural parts. The injection mold is composed of an active mode and a fixed mode.
The movable pattern is installed on the movable template of the injection molding machine, and the fixed pattern is installed on the fixed template of the injection molding machine.
During the injection molding process, the movable mold and the fixed mold are closed to form a gating system and a cavity. When opening the mold, separate the movable mold and the fixed mold to take out the plastic product.
1. Pouring system
The gating system is also called the runner system. It is a set of feed channels that can guide the plastic melt from the nozzle of the injection machine to the cavity. It is usually composed of main runner, runner, gate and cold material cavity. It is directly related to the molding quality and production efficiency of plastic products.
2. Temperature control system
In order to meet the mold temperature requirements during the injection molding process, a temperature adjustment system is needed to adjust the mold temperature. For injection molds used for thermoplastics, a cooling system is mainly designed to cool the molds.
The common method of mold cooling is to open the cooling water channel in the mold and use the circulating cooling water to take away the heat in the mold. The heating of the mold can use hot water or steam in the cooling water channel, or a heating element can be installed around the mold.
3. Molded parts
The molded part consists of a core and a cavity mold. The core forms the inner surface of the product, and the concave mold forms the outer surface shape of the product. After closing the mold, the core and cavity constitute the cavity of the mold. According to process and manufacturing requirements, sometimes the core and mold are divided into several parts, sometimes they are manufactured as a whole, and the insert is only used for parts that are easily damaged and difficult to process.
4. Structural parts
It refers to the various parts that constitute the mold structure, including: various parts for guiding, demolding, core pulling and separation. Such as A and B plates, support plates, ejector guide pins, discharge plates and return pins.