Title:
【発明の名称】合成樹脂製ダストブ―ツおよびその製造方法
Document Type and Number:
Japanese Patent JP2539503
Kind Code:
B2
Abstract:
A method for providing a dust-proof boot for a protruding equipment shaft of the type including a pair of spaced apart annular grooves. The boot includes an expandable central belly portion, a pair of restricted diameter attachment ring portions adapted to be received in the shaft grooves, and a pair of connecting portions connecting the attachment ring portions to the belly portion. It is formed by first forming a parison on a male die. The parison includes preformed attachment ring portions and connecting portions, at least one of which includes an inwardly protruding annular ridge member which is received in a mating recess in the die. The parison and the male die are inserted into a female blow-molding, die, with the preformed attachment ring portions and connecting portions caught and supported between the male and female dies. The belly portion of the boot is next formed by blow molding, during which step the ridge members are urged into sealing relation with wall portions of the male die grooves, thus preventing distortion of the preformed attachment ring portions.
Inventors:
SHIRAI TADAYOSHI
YAMAMORI SHOJI
YAMAMORI SHOJI
Application Number:
JP33202388A
Publication Date:
October 02, 1996
Filing Date:
December 28, 1988
Export Citation:
Assignee:
SOMITSUKU ISHIKAWA KK
MITSUBISHI KAGAKU KK
MITSUBISHI KAGAKU KK
International Classes:
B29C49/02; B29C49/06; B29C49/48; B29C65/56; B62D3/12; F16J3/04; F16J15/52; B29L31/26; B29L31/30; (IPC1-7): F16J15/52; B29C49/02; B29C49/48; B62D3/12
Domestic Patent References:
| JP59116644U | ||||
| JP6245856Y2 |
Attorney, Agent or Firm:
Kabazawa Xiang (3 people outside)