Apparatus having a vacuum chamber for producing moldings

Plastic article or earthenware shaping or treating: apparatus – Including ventilating type hood or chamber encasing a...

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425 85, 425190, 425215, 4254051, 425546, 425589, 425DIG60, 264102, B28B 700, B29C 4564

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active

055405762

ABSTRACT:
An apparatus having a vacuum chamber or chamber, wherein the changing manner of the mold can be improved, the sealing structure of the vacuum chamber or an injection nozzle is simple, and the cost of the apparatus is reduced and preservation of the apparatus is improved. The apparatus has a vacuum chamber for surrounding a mold into an airtight situation. The vacuum chamber includes an upper casing and a lower casing, and they are being divided by a parting line defined by mating peripheral edge surfaces which incline upwardly from an operator-side to an opposite-side. An O-ring as a sealing member of the vacuum chamber is positioned between the peripheral edge surfaces.

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patent: 4790510 (1988-12-01), Takamatsu et al.
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patent: 4988271 (1991-01-01), Kumasaka
patent: 5112207 (1992-05-01), Pinsonneault
patent: 5238387 (1993-08-01), Hama et al.

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