English
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русский1) There is a problem with the material of the main working parts of the mold, and the material is not properly selected. The material has poor properties and is not wear-resistant; the die steel is unrefined and has a large number of smelting defects; the convex and concave dies, the forging billet and the forging process are not perfect, and there are still hidden dangers in heat treatment.
UPVC drainage pipe fitting mould
UPVC drainage pipe fitting mould2) There is a problem with the design of the mold structure, and the structure of the die is unreasonable. The slender punch is not designed with a reinforcement device, the discharge port is not smooth and there is accumulation, and the unloading force is too large, so that the punch is subjected to alternating loads and so on.
3) The molding process is not perfect, mainly manifested in the poor internal quality of the convex and concave die forging billets, and the problem of heat treatment technology and process, resulting in impermeable hardening of the convex and concave dies, soft spots and uneven hardness. Sometimes microcracks or even cracks occur, the grinding and polishing are not in place, and the surface roughness value is too large.
4) No lubrication or lubrication but the effect is not good
