Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Plastics Inc
Osaka Gas Co Ltd
Kyosei Corp
Original Assignee
Mitsubishi Plastics Inc
Osaka Gas Co Ltd
Kyosei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics Inc, Osaka Gas Co Ltd, Kyosei CorpfiledCriticalMitsubishi Plastics Inc
Priority to JP9443180ApriorityCriticalpatent/JPS5720327A/en
Publication of JPS5720327ApublicationCriticalpatent/JPS5720327A/en
PURPOSE: To obtain a corrosion-proof pipe joint having a long use endurance, by holding a metal pipe in a metal mold, and injecting a molten thermoplastic resin onto the periphery of the metal pipe to firmly adhere the synthetic resin layer onto the metal pipe en bloc.
CONSTITUTION: A metal pipe 1 is hold inside a metal mold 3 with use of a core member 2. A support rod 22 is carried along the direction shown as the arrow to expand a core ring to its maximum diameter. A molten thermoplastic resin is injected through a cade hole 32 into a cavity 31 inside the metal mold 3, to form a synthetic resin layer on each periphery of the metal pipe 1 and the core ring 21. After the synthetic resin layer is cooled and solidified, the metal mold 3 is opened and the core ring 21 is separated.
COPYRIGHT: (C)1982,JPO&Japio
JP9443180A1980-07-101980-07-10Production of corrosion-proof pipe joint
PendingJPS5720327A
(en)