Title:
METHOD FOR MOLDING PLASTIC PIPE WITH SOCKET
Document Type and Number:
Japanese Patent JP3136027
Kind Code:
B2
Abstract:
PURPOSE: To form a socket at the end of a pipe and embed a heater in the inside of the pipe by heating the end of the pipe close to its softening point, heating a core pin with the heater attached on its outside at the melting point of the pipe or higher, and inserting the core pin to the end of the pipe.
CONSTITUTION: A core pin 20 is made of iron or aluminum. A guide part 28 the outer diameter of which is almost equal to the inner diameter of a pipe 12 is molded at one end of a molding part 24 through a taper part 26. At the other end is molded a stopper part 30 which contacts the end face of the pipe 12. A cartridge heater 32 and the passage 34 of cooling water are installed inside the core pin 20. As a means for heating the core pin 20, a method in which high temperature steam, oil and others are passed through a passage formed in the core pin, a method for heating with a far infrared heater, and other method are applicable.
Inventors:
Masayuki Sakaguchi
Hideki Double
Taku Tago
Hideki Double
Taku Tago
Application Number:
JP13552593A
Publication Date:
February 19, 2001
Filing Date:
June 07, 1993
Export Citation:
Assignee:
Kubota Corporation
International Classes:
B29C57/04; F16L47/00; (IPC1-7): B29C57/04
Domestic Patent References:
| JP6281079A | ||||
| JP63272535A | ||||
| JP58201610A | ||||
| JP5340080A | ||||
| JP2194925A | ||||
| JP5542821A | ||||
| JP3118624U |
Attorney, Agent or Firm:
Yoshito Yamada