Basic knowledge and application of injection molding plastic hanger mold

Basic knowledge and application of injection molding plastic hanger mold:

All kinds of tools and products we use in our daily production and life, ranging from the base of the machine tool, the shell of the machine body, to the shell of a blank head screw, button and various household appliances, are all closely related to the mold.

The shape of the mold determines the shape of these products, and the processing quality and precision of the mold also determine the quality of these products. Due to the different materials, appearance, specifications and uses of various products, the molds are divided into non-plastic molds such as casting molds, forging molds, die-casting molds, stamping molds, etc., and plastic molds (plastic molds are injection molds, mainly producing some plastic hooks, , supermarket hooks, etc., the application range is wide)

1. In recent years, with the rapid development of the plastics industry and the continuous improvement of the strength and precision of general-purpose and engineering plastics, the application scope of plastic products is also expanding, such as: household appliances, instrumentation, construction equipment, automobile industry , daily hardware and many other fields, the proportion of plastic products is increasing rapidly. A well-designed plastic part can often replace multiple traditional metal parts.

The trend of plasticization of industrial and daily products is on the rise.

2. General definition of mold: In industrial production, various presses and special tools installed on the press are used to make metal or non-metallic materials into parts or products of the desired shape through pressure. Such special tools are collectively referred to as molds. .

3. Description of the injection molding process: The mold is a tool for producing plastic products. It consists of several sets of component parts, which have forming cavities within this set. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, and cooled and shaped in the cavity, and then the upper and lower molds are separated, and the product is ejected from the cavity through the ejection system to leave the mold, and finally the mold is closed again. For the next injection, the entire injection process is cyclic.

4. (1) On the mold line, the mold is released together with the product when the mold is opened. The design is the simplest, it is easy to process, and the cost is low. Therefore, many people use the large nozzle system for operation.

(2) Small nozzle mold: The runner and gate are not on the parting line, and are generally directly on the product. Therefore, it is necessary to design more than one set of nozzle parting lines. The design is more complicated and the processing is more difficult. Generally, it should be selected according to the requirements of the product. Fine nozzle system.

(3) Hot runner mold:

The structure of this type of mold is roughly the same as that of the fine nozzle. The biggest difference is that the runner is located in one or more hot runner plates and hot nozzles with constant temperature. There is no cold material demoulding, and the runner and gate are directly on the product, so The runner does not need to be demolded. This system is also called a nozzleless system, which can save raw materials. It is suitable for the situation where the raw materials are expensive and the product requirements are high, the design and processing are difficult, and the mold cost is high.