发明名称 |
Process for preparing double-wall blow-molded articles having a high stretching ratio and products so obtained. |
摘要 |
<p>A process for preparing double-wall blow-molded articles having a high stretching ratio, which comprises: a) extruding a tubular body (1) made of a thermoplastic polymer through an essentially annular extruder; b) positioning the tubular body (1) into an open blow-molding mold composed of a first concave half-mold (2), which partially reproduces the shape of the article to be produced, and of a second half-mold (3), which comprises a movable piston (4) supporting a template (5) capable of conforming to the concavities of the first half-mold (2); and c) closing the mold, molding by means of the blow-molding technique the tubular body (1) while it is still in a softened state, and simultaneously, or almost simultaneously introducing the movable piston (4) of the second half-mold (3) into the concavities of the first half-mold (2). <IMAGE></p> |
申请公布号 |
EP0480457(A1) |
申请公布日期 |
1992.04.15 |
申请号 |
EP19910117379 |
申请日期 |
1991.10.11 |
申请人 |
CENTRO SVILUPPO SETTORI IMPIEGO S.R.L. |
发明人 |
ADDEO, ANTONIO;BISCOTTI, AURELIO;COCCA, VINCENZO;PINETTI, LUCIO |
分类号 |
B29C49/30;B29C49/00;B29C49/04;B29C49/22;B29C49/48;B29L24/00 |
主分类号 |
B29C49/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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