US3794286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mould for injection moulding presses
Assignee: Thales Avionics SAS
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Filing: 1972-03-14
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Granted: 1974-02-26
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Expires: 1992-03-14
Abstract
Abstract A mould for a press for the injection moulding of thermosetting or thermoplastic materials which opens in two parts in a parting plane and comprises a fixed block and a movable block, wherein there is provided a centre member which has formed therein injection passages and is associated unit the fixed block in such manners as to effect, upon the opening of the mould, a movement of translation followed by a rotation.
Inventors
- 👤 Davin J Jullien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:31
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/40; Y; Y10; Y10S; Y10S425/00; Y10S425/051
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A mould for a press for the injection of thermosetting or thermoplastic materials to form moulded articles, which mould opens in two parts along a parting plane and comprises: a fixed block and a movable block; a movable center member having an upper part thereof disposed in said movable block and contiguous with said parting plane, said upper part having formed therein injection passages terminating at the top of the mould cavities formed in said fixed block so that injection takes place through said passages and across said parting plane into said mould cavities; means operatively associating said center member with said fixed block, so that upon opening of the mould along said parting plane there occurs, a movement of translation and subsequent rotation of said center member to thereby effect shearing of residual material in said injection passages from said moulded articles and discharge of said material.
Claim 2
Dependent Claim
148 words
A mould for a press for the injection of thermosetting or thermoplastic materials to form moulded articles, which mould opens in two parts along a parting plane and comprises: a fixed block and a movable block; a movable center member having an upper part thereof disposed in said movable block and contiguous with said parting plane, said upper part having formed therein injection passages terminating at the top of the mould cavities formed in said fixed block so that injection takes place through said passages and across said parting plane into said mould cavities; means operatively associating said center member with said fixed block, so that upon opening of the mould along said parting plane there occurs, a movement of translation and subsequent rotation of said center member to thereby effect shearing of residual material in said injection passages from said moulded articles and discharge of said material.
Claim 3
Dependent Claim
32 words
A mould as claimed in claim 1, wherein said center member is provided with a helical ramp on which acts a pin integral with an ejector for ejecting thermosetting or thermoplastic material.
Claim 4
Dependent Claim
48 words
A mould as claimed in claim 1, wherein said operatively a0sociating means includes a compression spring means interposed between said center member and said fixed block of said mould, said spring urging said center member to effect said movement of translation and rotation upon opening of the mould.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |