公开(公告)号：US5498381A

公开(公告)日：1996-03-12

申请号：US360377

申请日：1994-12-21

申请人： James R. Lorbiecki ,  Susan J. Lutz

发明人： James R. Lorbiecki ,  Susan J. Lutz

IPC分类号： B26D7/27 ,  B26F1/02 ,  B29C51/08 ,  B29C51/32 ,  B60N2/00 ,  B60N2/58 ,  B29C65/56

CPC分类号： B29C51/32 ,  B26D7/27 ,  B26F1/02 ,  B60N2/00 ,  B60N2/58 ,  B29C51/082 ,  Y10S264/67 ,  Y10T29/481 ,  Y10T29/49876

摘要： Methods for forming a strip of thermoplastic material by punch clamping are described. One method includes providing a clamping mold with i) a surface having at least one die space and ii) at least one clamp having at least one punch tip located in a punch body; providing a strip of thermoplastic material having a softening temperature and a melting temperature; heating the strip of thermoplastic material to a working temperature higher than the softening temperature and lower than the melting temperature; placing the strip of thermoplastic material in the clamping mold and against the surface and over the at least one die space; forming the strip of thermoplastic material by closing the at least one clamp so as to a) form the strip of thermoplastic material with the at least one clamp and b) pierce the strip of thermoplastic material with the at least one punch tip, in one step; cooling the strip of thermoplastic material to a removal temperature lower than the softening temperature; opening the at least one clamp; and removing the strip of thermoplastic material from the clamping mold. The methods provide advantages in that the time required to form the strip of thermoplastic material is reduced, the need for expensive injection molding equipment is obviated and the configuration of the resultant rings can be quickly modified to permit flexible manufacturing by simply changing the configuration of the clamping mold.

摘要翻译： 描述了通过冲压夹紧形成热塑性材料带的方法。 一种方法包括提供夹紧模具，i）具有至少一个模具空间的表面，以及ii）至少一个夹具，其具有位于冲头本体中的至少一个冲头顶端; 提供具有软化温度和熔化温度的热塑性材料条; 将热塑性材料条加热至高于软化温度并低于熔融温度的工作温度; 将所述热塑性材料带放置在所述夹紧模具中并抵靠所述表面并且在所述至少一个模具空间上; 通过关闭所述至少一个夹具来形成所述热塑性材料条，以便a）用所述至少一个夹具形成所述热塑性材料条带，以及b）在一个步骤中用所述至少一个冲头顶部刺穿所述热塑性材料带 ; 将热塑性材料条冷却到低于软化温度的去除温度; 打开所述至少一个夹具; 以及从夹紧模具中取出热塑性材料条。 该方法提供的优点在于，形成热塑性材料带所需的时间减少，避免了昂贵的注射成型设备的需要，并且可以快速地修改所得到的环的构造以允许通过简单地改变 夹紧模具。