Title:
METHOD AND APPARATUS FOR PORTABLE HEATING FOR BENDING THERMOPLASTIC TUBE
Document Type and Number:
Japanese Patent JP3134199
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make it possible to safely execute the tube bending operation without impairing the quality of a tube by so expanding a pressurizing bag as to be smaller than the diameter of the thermoplastic tube, winding the outer periphery with a heating sheet, then inserting it to the part desired to be bent in the tube, further expanding the bag, and heating the sheet.
SOLUTION: A pressurizing bag 1 is coupled to a coupling tube 2, and the bag l is expanded by an air pump 3. In this case, the diameter of the bag 1 is reduced smaller than the inner diameter of the thermoplastic tube, and the bag 1 becomes cylindrical even through it is slender. Its outer periphery is loosely wound at the side that the heat insulator of a heating sheet 4 is disposed as the inside. Then, it is inserted to the part desired to be bent in the tube. In this case, when the bag 1 has a mandrel and a locking plate, if it is intruded by using an inserting rod, it is facilitated. Thereafter, the bag 1 is further expanded until the sheet 4 is brought into contact with the inner periphery 5 of the tube. After the close contact, the sheet 4 is heated.
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| JPH01193558 | GAS-BURNING HOT AIR HEATER |
Inventors:
Yoshihiko Kobayashi
Application Number:
JP29187195A
Publication Date:
February 13, 2001
Filing Date:
October 14, 1995
Export Citation:
Assignee:
Yoshihiko Kobayashi
International Classes:
F24H3/04; B29C53/08; B29C53/84; F26B23/00; B29L23/00; (IPC1-7): B29C53/08; B29C53/84
Domestic Patent References:
| JP5124098A | ||||
| JP7148835A |