会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明专利
    • APPARATUS AND PROCESS FOR THERMOFORMING PLASTIC MATERIALS
    • CA1311341C
    • 1992-12-15
    • CA585058
    • 1988-12-06
    • WENDT MICHAEL L
    • WENDT MICHAEL L
    • B29C51/04B29C51/42B29C51/10
    • An apparatus and method for thermoforming articles out of a sheet plastic material utilizes a female mold having one or more cavities and a male mold including corresponding plug assists. Each cavity of the female mold communicates with a first passageway connected to a switched vacuum source. Each plug assist is provided with at least one inlet extending through the plug assist and at least one second passageway, each of which communicate with a respective cavity when the mold is closed. A switched first heated air source communicates with the inlet supplies heated air through the inlet into the cavity under pressure. A second switched heated air source communicates with each second passageway supplies air through the second passageways into a cavity when the mold is in the closed position. third switched air source communicates with the inlet supplies air through the inlet into the cavity at a third pressure and temperature. Pressure of the first air source is suitably adjusted to create a cushion between the plug assist and the production sheet to prevent contact as the mold is closing. Pressures, temperatures and flows are controlled to enhance rapid, uniform crystallization of a plastic substrate being molded.