US4470786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus with retractable preform support pins
Assignee: Omron Corp
•
Filing: 1982-06-28
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Granted: 1984-09-11
•
Expires: 2002-06-28
Abstract
Abstract A molding method and apparatus in which an insert part is supported in a mold cavity by a pin. The pin is withdrawn when the resin pressure in the mold exceeds a predetermined value.
Inventors
- 👤 Takezo Sano
- 👤 Kenichi Tsuruyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:44
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14065; B29C45/14073; B29C33/00; B29C33/12; B29C33/14; B29C70/00; B29C70/68; B29C70/72; H; H10; H10W; H10W74/00; H10W74/01; H10W74/016; B29C2045/14081; B29C2045/1409; Y; Y10; Y10S; Y10S425/00; Y10S425/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A molding apparatus comprising: a metal mold having upper and lower parts defining therebetween a mold cavity for receiving a resin; first and second pins extending into said cavity for supporting an insert part in said cavity; means urging said pin into said cavity including a backing plate mounted in a chamber adjacent said cavity and having a first surface engaging said pins and an opposed inclined surface; a pressure sensor for detecting the pressure in said cavity and having a portion in communication with said cavity; means engaging said pin for causing withdrawal of said pins when the detected pressure exceeds a predetermined value including at least one spring urging said backing plate in a direction to withdraw said pins from said cavity, a sliding plate having an inclined surface in contact with said inclined surface of said backing plate and means for moving said plate in a transverse direction to withdraw said pins from said cavity when said detected pressure exceeds said predetermined value.
Claim 2
Dependent Claim
166 words
A molding apparatus comprising: a metal mold having upper and lower parts defining therebetween a mold cavity for receiving a resin; first and second pins extending into said cavity for supporting an insert part in said cavity; means urging said pin into said cavity including a backing plate mounted in a chamber adjacent said cavity and having a first surface engaging said pins and an opposed inclined surface; a pressure sensor for detecting the pressure in said cavity and having a portion in communication with said cavity; means engaging said pin for causing withdrawal of said pins when the detected pressure exceeds a predetermined value including at least one spring urging said backing plate in a direction to withdraw said pins from said cavity, a sliding plate having an inclined surface in contact with said inclined surface of said backing plate and means for moving said plate in a transverse direction to withdraw said pins from said cavity when said detected pressure exceeds said predetermined value.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |