发明名称 Gypsum board perforation method for e.g. acoustic construction/decoration elements in building construction field, involves moving punch at advancement speed of specific value, perforating gypsum board using punch, and withdrawing punch
摘要 <p>The method involves placing a punch on a side of a gypsum board presenting a decorative covering at 90 degrees with respect to the gypsum board. A die is placed on a side of the gypsum board not presenting the decorative covering. The punch is moved at advancement speed ranging between 6 to 10 meters per minute. The gypsum board is perforated using the punch, and the punch is withdrawn.</p>
申请公布号 FR2939352(A1) 申请公布日期 2010.06.11
申请号 FR20080006886 申请日期 2008.12.09
申请人 LAFARGE PLATRES 发明人 SAINTAGNE FREDERIC;VALENTI EMMANUEL
分类号 B28D1/14;B44C5/04;E04C2/04 主分类号 B28D1/14
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