Hot-pressing process and equipment for foamed product with hole-shaped structure

Abstract

The invention discloses a hot-pressing process and equipment for a foamed product with a hole-shaped structure. The process comprises the following steps: (1) forming a through hole in a correspondingposition of a foam material through milling machining; (2) producing a hole core rod with a corresponding diameter, mounting the hole core rod between an upper pressure mold and a lower pressure moldof a hot-pressing mold, and connecting the hole core rod with the upper pressure mold through a spring; (3) putting the foam material between the upper pressure mold and the lower pressure mold, andinserting the hole core rod into the through hole formed in the foam material; and (4) heating the mold to a preset temperature, maintaining the press-fit pressures and temperatures of the upper pressure mold and the lower pressure mold, and carrying out thermal treatment on the foam material on the hole wall of the through hole at the temperature equal to the press-fit temperature by virtue of the hole core rod. The hot-pressing process has the beneficial effects that the neat and attractive hole characteristic is increased for a high-elasticity product or a product produced from a soft material, so that the problems that the surface is broken in the subsequent machining process and the like are avoided.

Description

technical field [0001] The invention belongs to the technical field of hot-pressing of foamed products, and in particular relates to a hot-pressing process and hot-pressing equipment for foamed products with a porous structure. Background technique [0002] The existing products formed by cold pressing or hot pressing of molds cannot directly make small holes or through holes, and can only be processed through subsequent machining, or the diameter of the enlarged hole is pressed through the mold core, and milling and drilling are used after pressing. The process will cause the internal material of the product to be powdered, which is too different from the appearance of the external material, which is not beautiful and not resistant to dirt. Moreover, due to the elasticity of the material, the size of the drilled hole is seriously deformed and the size is different; for holes with relatively large diameters , such as a through hole with a diameter > 5cm, there is no suita...

AI Technical Summary

Problems solved by technology

[0002] The existing products formed by cold pressing or hot pressing of molds cannot directly make similar small holes or through holes, but can only be processed through subsequent machining, or the diameter of the enlarged hole is pressed through the mold core, and milling and drilling are used after pressing. The process will cause the internal material of the product to be powdered, which is too different from the appearance of the external material, which is not beautiful, not resistant to dirt, and due to the elasticity of the material, the drilled hole diameter and other dimensions are seriously deformed and the size is different; for holes with relatively large diameters , such as a through hole with a diameter > 5cm, there is no suitable large-diameter tool to process

It can only be pressed through the core of the mold, but due to the elasticity of the material, defects such as brittleness, uneven density or adhesion will occur at the corner of the core, and the inner surface of the hole will also be damaged when the mold is released.

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