Foam molding machine with negative pressure drainage system

Abstract

The invention discloses a foam plastic forming machine with a negative pressure drainage system. The foam plastic forming machine comprises a machine frame and a forming mechanism. The forming mechanism comprises a mold and a steam boiler. The mold comprises a fixed mold body, a movable mold body and a mold cavity located between the fixed mold body and the movable mold body. The negative pressure drainage system further comprises a vacuum air exhauster, a fixed mold cooling chamber formed in the fixed mold body, a movable mold cooling chamber formed in the movable mold body, a steam inlet communicated with the mold cavity, a steam outlet communicated with the mold cavity, a vacuum tank and a spray pipe. The vacuum tank is provided with a tank steam inlet, a tank vacuum air opening, a tank atmosphere opening and a tank draining opening; the spray pipe extends into the vacuum tank, and the tank steam inlet is communicated with the steam outlet through a pipe; and a steam inlet control valve is arranged at the tank steam inlet, a steam boiler air outlet is communicated with the steam inlet, and the vacuum air exhauster is communicated with the steam boiler. According to the foam plastic forming machine, water in the mold cavity is rapidly discharged through negative pressure, the water content on the surface of a product is greatly reduced, and the effects of energy saving and emission reduction are achieved. The invention further discloses a negative-pressure draining technology.

Description

technical field [0001] The invention relates to a foam molding machine, in particular to a foam molding machine with a negative pressure drainage system. Background technique [0002] The foam molding machine is mainly used for the compression molding of foam plastic materials, often using the method of heating and plasticizing. The existing foam molding machine includes a frame, and a feeding mechanism and a molding mechanism installed on the frame. A hydraulic cylinder that presses or distances the formwork. After the movable template and the fixed template are molded together, a mold cavity will be formed between the two, and the mold cavity will be filled with foam plastic through the feeding mechanism, and then the raw material particles will be expanded and formed in the mold cavity by high-temperature steam. After molding, demoulding is required. Since the product is prepared in a high-temperature steam environment, the temperature of the product is very high, whic...

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Problems solved by technology

[0003] The traditional cooling method is to pour cooling water into the mold cavity, which often leads to too long cooling time and affects production efficiency

Moreover, although the cooling efficiency is improved by cooling water, a large amount of moisture will remain on the product, resulting in an excessively high moisture content of the product, which requires subsequent dehydration work, which increases the production process, prolongs the production cycle, and reduces production. efficiency

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