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How is the mold made?

update:20-12-2019
abstract:

The requirements for mold design and production are: ac […]

The requirements for mold design and production are: accurate size, smooth surface; reasonable structure, high production efficiency, easy to automate; easy manufacturing, high life, low cost; design meets the needs of the process, economic and reasonable.

Mould structure design and parameter selection must consider factors such as rigidity, guidance, unloading mechanism, positioning method, gap size, etc. The wearing parts on the mold should be easily replaced. For plastic molds and die-casting molds, it is also necessary to consider a reasonable pouring system, the flow state of molten plastic or metal, and the location and direction of entering the cavity. In order to improve productivity and reduce pouring loss of the runner, a multi-cavity mold can be used, and multiple identical or different products can be completed in one mold at the same time. High-efficiency, high-precision, long-life molds should be used in mass production.

The stamping die should use a multi-stage progressive die, and a carbide insert progressive die can be used to improve the service life. In small batch production and trial production of new products, simple molds with simple structure, fast manufacturing, and low cost should be used, such as combination punches, sheet metal punches, polyurethane rubber molds, low melting point alloy molds, zinc alloy molds, and superplastic alloy molds. Molds have begun to use computer-aided design (CAD), which is to optimize the design of molds through a computer-centric system. This is the development direction of mold design.