Title:
METHOD OF MOLDING IRREGULAR PITCH HELICAL BODY
Document Type and Number:
Japanese Patent JP3162439
Kind Code:
B2
Abstract:
PURPOSE: To dispense with selection of materials, and obtain an irregular pitch helical body with excellent accuracy by fitting a regular pitch helical body into the spiral groove of a cylindrical mold provided with an irregular pitch spiral groove, and heating the mold to the softening temperature or higher of the quality of the helical body, and thereafter cooling it to the softening temperature or lower.
CONSTITUTION: A regular helical body 1 is wound round a mold 4 while fitting it into the spiral groove 5 of the first mold 4. After setting the regular pitch helical body 1, the second mold 6 for pressing the outer peripheral surface of the helical body 1 is attached on the first mold 4. Next, first and second set molds 4, 6 are inserted into a heater 7. After the first and second molds are heated by the heater 7 to the softening temperature or higher for predetermined period, heating is released for cooling the molds 4, 6. When the helical body 1 is cooled to the softening temperature or lower, the molds 4, 6 are so separated that the helical body 1 is removed therefrom.
More Like This:
| JP7338078 | tip dresser |
| JP3888618 | ROD END FACE MACHINING APPARATUS |
| JPH0375232 | PRODUCTION OF OPTICAL FIBER MATERIAL |
Inventors:
Oyama Iwane
Application Number:
JP27220491A
Publication Date:
April 25, 2001
Filing Date:
October 21, 1991
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
B24B19/00; B24B27/00; B29C69/00; B29D99/00; B29L31/00; (IPC1-7): B29D31/00
Domestic Patent References:
| JP6169439A |
Attorney, Agent or Firm:
Takehiko Suzue
Previous Patent: 苗木支持具及び苗木支持具キット
Next Patent: CHARGE TRANSFER DEVICE AND SOLID-STATE IMAGE PICK-UP DEVICE
Next Patent: CHARGE TRANSFER DEVICE AND SOLID-STATE IMAGE PICK-UP DEVICE