发明授权
US4035455A Method for blow molding a hollow plastic article having a concave base
失效
用于吹塑具有凹形基底的中空塑料制品的方法
- 专利标题: Method for blow molding a hollow plastic article having a concave base
- 专利标题(中): 用于吹塑具有凹形基底的中空塑料制品的方法
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申请号: US614058申请日: 1975-09-16
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公开(公告)号: US4035455A公开(公告)日: 1977-07-12
- 发明人: Otto Rosenkranz , Karl-Heinrich Seifert
- 申请人: Otto Rosenkranz , Karl-Heinrich Seifert
- 申请人地址: DT
- 专利权人: Heindenreich & Harbeck
- 当前专利权人: Heindenreich & Harbeck
- 当前专利权人地址: DT
- 优先权: DT2222535 19720508
- 主分类号: B29C33/10
- IPC分类号: B29C33/10 ; B29C49/06 ; B29C49/54 ; B29C67/00 ; B29C17/07
摘要:
In a blow-moulding process, the base of a hollow plastics body is formed initially of convex configuration and then a portion of the base is deformed inwardly to provide a concave area surrounded by an annular support surface. Deformation of the base is controlled in response to an increase of pressure in the mold cavity after termination of venting thereof.
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