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Introduction to the basic concepts of plastic molds

Update:16-11-2021
Summary:

The various tools and products used in our daily produc […]

The various tools and products used in our daily production and life, ranging from the base of the machine tool, the body shell, to a small screw, button and the shell of various household appliances, are all closely related to the mold. The shape of the mold determines the appearance of these products, and the processing quality and precision of the mold also determines the quality of these products. Because of the different materials, appearance, specifications and uses of various products, molds are divided into non-plastic molds such as casting molds, forging molds, die-casting molds, and stamping molds, as well as plastic molds.
In recent years, with the rapid development of the plastics industry and the continuous improvement of the strength and precision of general and engineering plastics, the application range of plastic products is also expanding, such as: household appliances, instrumentation, construction equipment, automobile industry, Japan In many fields such as hardware, the proportion of plastic products is increasing rapidly. A reasonably designed plastic part can often replace multiple traditional metal parts. The trend of plasticization of industrial products and daily-use products is on the rise.
General definition of plastic 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 required shape through pressure. Such special tools are collectively called molds.
Description of injection molding process:
A mold is a tool for producing plastic products. It is composed of several groups of parts, and there is a molding cavity in this combination. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, cooled and shaped in the cavity, and then the upper and lower molds are separated, and the product is ejected from the cavity and out of the mold through the ejection system, and finally the mold is closed again For the next injection, the entire injection molding process is carried out cyclically.
General classification of molds: can be divided into plastic molds and non-plastic molds:
(1) Non-plastic molds include: casting molds, forging molds, stamping molds, die-casting molds, etc.
A. One tap and pig iron platform for casting mold;
B. Forging die a car body;
C. Stamping die-computer panel;
D. A super alloy die-casting mold, cylinder block;
(2) Plastic molds are divided into different production processes and products:
A. Injection molding mold-TV shell, keyboard button (the most common application);
B. Blow mold a beverage bottle;
C. Compression molding mold, bakelite switch, scientific porcelain dishes
D. Transfer molding mold-integrated circuit product;
E. Extrusion mould-glue hose and plastic bag;
F. Thermoforming mould a transparent moulded packaging shell;
G. Rotational mould a soft rubber doll toy;
Injection molding is the most commonly used method in plastic processing:
This method is suitable for all thermoplastics and some thermosetting plastics. The number of plastic products produced is beyond the reach of other molding methods. As one of the main tools of injection molding processing, the injection mold is in terms of quality accuracy, manufacturing cycle and injection molding process. The level of production efficiency, etc. directly affects the quality, output, cost and product update of the product, and also determines the ability and speed of the company’s response in market competition.