培训体系搭建专利名称：Formation of connecting sleeve on a pipe of thermoplastic material
发明人：Christof Baumgartel
申请号：US05/630008蟹粉豆腐>董永公园
申请日：19751107
公开号：US04079110A
6是2的几倍公开日：学前教育研究
19780314
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专利内容由知识产权出版社提供
摘要：In order to provide the end of a pipe of thermoplastic material with a connecting sleeve prenting an outwardly projecting annular bulge, the pipe end is heated to the deformation temperature of the plastic material, is then introduced into the annular gap formed between a sleeve mandrel and an outer mold formed to have an annular recess prenting a free bulge space in a widening and compressing device, the surface of the mandrel being formed to have a constriction opposite the annular recess in the mold, the pipe end is widened in the sleeve region by the mandrel and is simultaneously compresd in the axial direction until it fills the annular gap, then the axial advancing force required to push the heated pipe end and to compressively deform it is incread while there is simultaneously applied a supporting pressure to the pipe in the region of the free bulge space and in the direction from the sleeve mandrel toward the outside until the pipe wall material, under the influence of the advancing force and the supporting pressure, bulges into the free bulge space, and finally, while maintaining the incread advancing force, the supporting pressure in the region of the free bulge space is incread to a compression pressure value which press the bulged pipe wall material against the peripheral outline of the recess in the outer mold.
申请人：REHAU PLASTIKS GMBH 代理机构：Spencer & Kaye
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