JPS6458533A - Preparation of expansion joint - Google Patents
Preparation of expansion jointInfo
- Publication number
- JPS6458533A JPS6458533A JP62217698A JP21769887A JPS6458533A JP S6458533 A JPS6458533 A JP S6458533A JP 62217698 A JP62217698 A JP 62217698A JP 21769887 A JP21769887 A JP 21769887A JP S6458533 A JPS6458533 A JP S6458533A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- bladder
- mandrel
- diameter
- outer peripheral
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Joints Allowing Movement (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
PURPOSE:To reduce the stress applied to a steel pipe and to facilitate manufacturing, by arranging a bladder to the outer peripheral surface of a mandrel having a diameter small than the inner diameter of a joint body to again insert the same in a primarily molded main body and expanding said bladder to expand the central part of the main body to perform secondary vulcanization. CONSTITUTION:An inner surface rubber 12, a reinforcing cord 13, an end part reinforcing member 14 and outer surface rubber 15 are successively wound around the outer peripheral surface of a mandrel 11 having an outer diameter almost same to the caliber of a steel pipe and primary vulcanization is performed to perform the primary molding of an expansion joint main body 10. Next, the mandrel 11 is pulled out from the main body 10 and a bladder 16 is arranged to the outer peripheral surface of a mandrel having a diameter smaller than the inner diameter of the main body 10 to be again inserted in the primarily molded main body 10. From this state, the bladder 16 is again expanded by a vulcanization apparatus to expand the central part 10a of the main body 10 and secondary vulcanization is performed in this state to mold the expansion joint main body 10 whose central part expands.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217698A JPS6458533A (en) | 1987-08-31 | 1987-08-31 | Preparation of expansion joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217698A JPS6458533A (en) | 1987-08-31 | 1987-08-31 | Preparation of expansion joint |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6458533A true JPS6458533A (en) | 1989-03-06 |
Family
ID=16708322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62217698A Pending JPS6458533A (en) | 1987-08-31 | 1987-08-31 | Preparation of expansion joint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6458533A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9834733B2 (en) | 2012-12-27 | 2017-12-05 | Mitsubishi Heavy Industries, Ltd. | Char removal pipe |
-
1987
- 1987-08-31 JP JP62217698A patent/JPS6458533A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9834733B2 (en) | 2012-12-27 | 2017-12-05 | Mitsubishi Heavy Industries, Ltd. | Char removal pipe |
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