Cemented carbide dies are a kind of hard alloy with high hardness, corrosion resistance, high temperature resistance and small expansion coefficient.

Common cemented carbide molds are: cold heading die, cold punching die, wire drawing die, hexagonal die, spiral die and so on.

Compared with traditional metal molds, cemented carbide molds have the advantages of high production efficiency, good workpiece quality and long mold life.

(1) Conducive to mold release: the general mold release mechanism is in the moving mold, so the selection of parting surface should be as far as possible to make the product stay in the moving mold after opening the mold. Therefore, for some places that may stick to the fixed mold, we often add the fixed mold auxiliary mold release mechanism.

(2) Consider the lateral mold opening distance: the general lateral mechanical mold opening distance is relatively small. Therefore, when selecting the parting surface should be the core of the long distance from the direction of the front and back of the mold opening and closing of the direction of the short direction to do for the lateral parting.

(3) Mold parts easy to process: choose the parting surface, the mold should be divided into easy to process parts, reduce the difficulty of machining.

(4) Favorable to exhaust: When the parting surface is used as the main exhaust, the parting surface should be designed at the end of the plastic flow to facilitate the exhaust.

(5) R parting: for mold design parting many products, parting surface at the R corner of a whole circle, the parting of this time has to take into account the R best parting, can not appear on the side of the tip.

(6) Clamping force considerations: the mold's lateral clamping force is relatively small, so for large products with a large projection area, the direction of the projection area should be placed in the direction of the front and rear mold opening and closing direction, and the side of the side of the projected area of the smaller as the lateral parting.

(7) In line with the product release requirements: the parting surface is also for the product can be taken out of the mold smoothly. Therefore, the location of the parting surface should be selected in the largest part of the product section size, which is a basic principle.

(8) The shape of the parting surface: general products, often using a perpendicular to the injection molding machine and the direction of the opening movement of the parting surface, in special circumstances before the use of other shapes of the parting surface. The shape of the parting surface to facilitate processing and demolding as a principle. Like a curved product, molding according to the curvature of its curvature to.

(9) To ensure the appearance and quality of the product: the parting surface should not be selected in the smooth surface of the product. The appearance of the surface in general is not allowed to have a line of clips and other lines affecting the appearance of the emergence; some of the concentricity requirements of the product, the concentricity requirements have to be placed on the same side of all the parts, so as to ensure its concentricity.

(10) Orientation determination: in deciding the orientation of the product inside the mold, the selection of the parting surface should try to prevent the formation of side holes or side buckle bit, should avoid the use of complex mold structure.

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