公开(公告)号：US4120521A

公开(公告)日：1978-10-17

申请号：US760958

申请日：1977-01-21

Applicant: Gunnar Parmann

Inventor： Gunnar Parmann

IPC: B29C57/02 ,  F16L47/10 ,  F16L55/00

CPC classification number: B29C57/025 ,  F16L47/10 ,  Y10S425/044 ,  Y10S425/218

Abstract: Combined mould element and sealing ring suitable for sealing off a joint between a socket end and an insert end of two cooperating pipes formed from thermoplastic material and for being used as a portion of a body of a mould for both fabricating the socket end of the one pipe and simultaneously inserting the ring in an internal groove in the socket end produced thereby. The main bulk of the sealing ring is composed of elastically yielding material having within its contour at least one zone composed of relatively non-elastic material capable of rendering the zone stable as regards its shape compared with the remainder of the ring. Conveniently, such zones are formed by stiffening rings permanently connected to the main bulk of the sealing ring.

Abstract translation: 组合的模具元件和密封环适用于密封由热塑性材料形成的两个配合管的插座端和插入端之间的接头，并且用作模具的主体的一部分，用于制造一个的插座端 并且同时将环插入由其制造的插座端部中的内部凹槽中。 密封环的主要部分由弹性屈服材料组成，其弹性屈服材料在其轮廓内具有至少一个由相对非弹性材料组成的区域，该区域能够使区域与环的其余部分相比形状稳定。 方便地，这样的区域由永久连接到密封环的主体的加强环形成。

公开(公告)号：US4061459A

公开(公告)日：1977-12-06

申请号：US766516

申请日：1977-02-07

Applicant: Gunnar Parmann

Inventor： Gunnar Parmann

IPC: B29C57/02 ,  F16L47/10 ,  B29C17/02

CPC classification number: B29C57/025 ,  F16L47/10 ,  Y10S425/044 ,  Y10S425/218

Abstract: The combined mold element and sealing ring is formed of an elastically yieldable body and a rigid reinforcing non-elastic member within the body on a side spaced away from the leading edge of the body. The unit may be generally drop-shape, or otherwise, and is formed with minimal bulk.Positioning of the reinforcing member close to the outer radial portion of the elastic body reduces the manufacturing costs of the combined element as the bulk of the element may be reduced and the positioning of the rigid member in the rubber molds is facilitated. The reduced bulk also facilitates the molding of a thermoplastic pipe end over the unit to form a socket by reduced stretching of the pipe.The positioning of the rigid ring member also facilitates the anchoring effect of the combined element when used in a pipeline with internal pressure.

Abstract translation: 组合的模具元件和密封环由主体内的可弹性屈服的本体和刚性的加强非弹性构件形成在与主体前缘间隔开的一侧内。 该单元可以是大体上的液滴形状，或者以其它方式形成，并以最小的体积形成。