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Why are injection molds so expensive?

TIME:2021-01-11 Share

Injection molds are various molds and tools used in industrial production to obtain desired products by injection molding, blow molding, extrusion, die-casting or forging molding, smelting, and stamping.

In short, an injection mold is a tool used by an injection molding machine to mold objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article by changing the physical state of the formed material. Known as the "Mother of Industry". Under the action of external force, the blank becomes a tool with a specific shape and size. It is widely used in punching, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics and other products.

injection mold

The injection mold has a specific contour or cavity shape, and the contour shape with the cutting edge can be used to separate the blank according to the contour shape (punching). The application of the cavity shape can make the blank obtain the corresponding three-dimensional shape. The mold generally includes two parts: a movable mold and a fixed mold (or a convex mold and a concave mold), which can be separated or combined. The parts are taken out when separated, and the blanks are injected into the mold cavity to form when closed. The mold is a precision tool with a complex shape and can withstand the expansion force of the blank. It has high requirements for structural strength, rigidity, surface hardness, surface roughness and processing accuracy. The development level of mold production is one of the important signs of the level of injection molding machinery manufacturing. .

Due to the complicated manufacturing process of the injection mold, the price of the materials used is also high, and the labor cost is also high. Therefore, the production cost of the mold is very high.

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