Title:
PRODUCTION OF NOZZLE FOR INJECTION MOLDING
Document Type and Number:
Japanese Patent JP3824336
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a nozzle for injection molding executing brazing sealing a space surrounding a heating wire and the casting of a thermally conductive material into the sealed space in a single cycle of a vacuum furnace.
SOLUTION: A heating wire is mounted in a space 42 formed between an inner core 12, an outer collar and an outer sleeve 38. The space 42 is first sealed by brazing with a nickel alloy brazing material, and then, a copper conductive material 50 is cast into the space 42. Both the brazing and casting are done in a single cycle of a vacuum furnace. An insulative cap 54 is placed over the nozzle assembly 46 so as to cool the thermally conductive material melted by an inert gas fed to the vacuum furnace from the bottom in due order. This produces unidirectional solidification to avoid the formation of voids in the thermally conductive material, so that the thermal conductivity of the nozzle can be improved.
Inventors:
JOBST ULRICH GELLERT
Application Number:
JP22993195A
Publication Date:
September 20, 2006
Filing Date:
September 07, 1995
Export Citation:
Assignee:
JOBST ULRICH GELLERT
International Classes:
B22D19/00; B23K1/00; B23K35/30; B23P15/00; B29C45/20; B29C45/27; (IPC1-7): B22D19/00; B23K1/00; B23K35/30; B29C45/20
Domestic Patent References:
| JP62144918A | ||||
| JP4226729A |
Attorney, Agent or Firm:
Kazuo Sato
Asahi Maejima
Akira Okawa
Yoneyama Katsumi
Asahi Maejima
Akira Okawa
Yoneyama Katsumi