Hot pressing die with low thermal conductivity coefficient layer on surface

Abstract

The invention discloses a hot pressing die with the low thermal conductivity coefficient layer on the surface, and belongs to the hot pressing die with the temperature of a die steel main body being higher than the temperature of the die contact surface of the pressed material in all or some local areas. The whole contact surface of a die steel upper die or a die steel lower die is provided with alow heat conductivity coefficient surface layer which is lower than the die steel body, and the low temperature surface layer which is lower than the temperature of the die steel body is arranged onall contact surfaces of the die steel upper die or the die steel lower die. The coefficient of thermal conductivity of the low thermal conductivity surface layer was 0.150-0.300 / W / m DEG C. The hot pressing die has the advantages that the hardness of the surface of the die steel can be changed, the working efficiency of die steel energy storage can be increased, the surface smoothness machining difficulty is reduced, the appearance diversity effect of the product is improved, the surface smoothness machining difficulty is reduced, demolding is easy, the original flat and smooth surface of the part of the machined plate is kept, and the other parts can be rapidly heated and pressed into the required concave-convex pattern.

Description

technical field [0001] The invention belongs to the technical field of molds for hot-molding forming plates, and in particular relates to the contact surface of an upper mold and a lower mold with a low thermal conductivity layer on the surface of the mold whose thermal conductivity is lower than that of the rigid main body steel of the mold. Some local surfaces are subjected to mold temperature adjustment technology that is lower than the temperature of the mold steel. Background technique [0002] Most of the current hot-pressing molds use the mold steel to directly contact the processed plate. The hot-pressing forming process has two heating methods: heating the mold and heating the pressed plate. [0003] The method of heating the mold: that is, use the hot mold to press the cold plate to form the plate, the mold steel directly transfers the heat to the pressed plate, and the temperature required for the pressed plate to be formed is directly determined by the temperatur...

AI Technical Summary

Problems solved by technology

The pressed plate needs to be hot-pressed by the mold, and it needs to be heated to quickly deform into the shape specified by the mold. When the pressed plate is heated by the mold, the pressed plate itself will also be deformed. If the formed product of the pressed plate has a large area without patterns, and When it is a large-area plane, the deformation of the pressed plate itself will cause the large-area plane area of ​​the formed product to have an uneven and unsightly effect

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