Vacuum seal structure of plastics suction mould

Abstract

The invention discloses a vacuum seal structure of a plastics suction mould, and relates to the technical field of plastic forming or connection. The structure comprises a plastics suction mold, a connecting part and a plastics suction machine vacuum pipe; the plastics suction mould is arranged at the upper end of the connecting part, the plastics suction machine vacuum pipe is arranged at the lower end of the connecting part, the plastics suction mould comprises a mould body, a bottom plate and at least two supports. Through connection of the supports and the bottom plate and meanwhile abut connection of the mould connecting part and the bottom plate, only the supports need to be loosened when the mould is replaced, the mould and the bottom plate are moved away, operation of detaching thewhole connecting part is avoided, and replacement of the plastics suction mould is facilitated; when the mould is replaced, the bottom plate matched with the mould only needs to be replaced, replacement of the whole vacuum box is avoided, and material waste is reduced.

Description

technical field [0001] The invention relates to the technical field of forming or connecting plastics, in particular to a vacuum sealing structure of a plastic-absorbing mould. Background technique [0002] The current vacuum forming process on the market relies on vacuuming between the mold and the plastic absorbing material, and the resulting negative pressure makes the material adsorb on the surface of the material. The existing vacuum structure is to set a vacuum under the mold that is larger in length and width than the mold. Place the vacuum box on the mold base, and lead out the mold vacuum interface from one side of the vacuum box, and connect it to the vacuum tube of the plastic machine through the mold vacuum interface, so that a negative pressure can be formed in the vacuum box, and then through the vacuum box and the mold The holes between the molds can also achieve negative pressure at the mold, so as to realize the vacuum operation of the blister. [0003] How...

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Problems solved by technology

[0003] However, in the actual operation of this vacuum generation method at this stage, the place where the vacuum box and the mold are in contact needs to be sealed with sealant. In addition, when the mold is replaced, because the size of the mold is different, the vacuum box and the mold are at the same time. It must be replaced, so a lot of vacuum box materials are wasted. At the same time, because of the replacement of the vacuum box, the vacuum tube of the blister machine must be disassembled and separated from the vacuum interface of the mold every time, so that the sealing of the vacuum interface of the mold and the vacuum tube of the blister machine is reduced. , thus reducing the efficiency of forming a negative pressure

[0004] Not only that, usually the plastic softening heat source is above the mold. Commonly used plastic materials are ABS, PP, PC, etc., and the material of the vacuum tube of the plastic machine is also a PP material. The heat resistance value of the vacuum tube of the plastic machine and the plastic material The difference is not big. Using the traditional vacuum forming method, after a long time of work, the vacuum tube of the blister machine will be softened and deformed, which will further reduce the sealing performance and reduce the efficiency of forming negative pressure.

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