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Structural elements of plastic moulds
- Jun 14, 2017 -

Shan-type surface, that is, the contact surface of concave die and convex die when die is closed. Its position and form of selection, affected by the shape and appearance of products, wall thickness, molding methods, post-processing technology, mold type and structure, demoulding methods and molding machine structure and other factors.

Shan structural parts, namely the slippery block of the complex mould, the slanting top, the straight top block and so on. The design of the structure is very important, which relates to the life of the die, the processing cycle, the cost, the product quality, so the design of the complex die core structure has higher requirements for the designer's comprehensive ability, and pursues the simpler, more durable and economical design plan as far as possible.

Shan die precision, that is, avoiding cards, fine positioning, guide pillars, positioning pins and so on. Positioning system is related to product appearance quality, mold quality and life, according to different mold structure, choose different positioning mode, positioning accuracy control mainly rely on processing, the internal mold positioning is the designer to fully consider, design a more reasonable and easy to adjust positioning mode.

Shan pouring system, that is, from the injection molding machine nozzle to the feed channel between the cavity, including the main road, Distributary Channel, gate and cold hole. In particular, the selection of the gate position should be beneficial to the molten plastic filled with a cavity in a good flow state, and the solid-state runner and the pouring cold material attached to the product are easy to be removed from the mold when opening the die (except for the hot Runner mold).

Shan the shrinkage of plastics and the factors that affect the dimension precision of the products, such as mold manufacture and assembly error, die wear, etc. In addition, in the design of molding die and injection mold, the process and structural parameters of the molding machine should also be considered. In the plastic mold design has been widely used in computer-aided design technology.