US4492555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple hot runner injection bush
Assignee: Jetform Heisskanalnormalien und Zubehor GmbH
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Filing: 1983-08-03
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Granted: 1985-01-08
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Expires: 2003-08-03
Abstract
Abstract A multiple hot runner injection bush for lateral tunnel gating, with a foot and a shaft heated by a heating element and a central hot sprue arranged therein, furthermore, with a heated nozzle head which contains radially extending injection channels. The technical problem of the invention is seen in the exact heat control and adjustment of the nozzle head if a plurality of mould nests is gated. The nozzle head is provided as a plate-like head and projects beyond the diameter of the shaft by a multiple distance of the diameter of the shaft (two times through five times). The nozzle head incorporates, at least, four radially extending injection channels. The nozzle head comprises a plane ring face, adjacent to the shaft, and an outer covering apron. A copper ring is attached on the ring face. The copper ring carries a spirally arranged high capacity coil heater.
Inventors
- 👤 Wolfgang Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:53
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2725
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A multiple hot runner injection bush for lateral tunnel gating, with a foot and a shaft heated by a heating element and a central hot sprue arranged therein, furthermore, with a nozzle head heated by a heating element wherein the nozzle head contains radially extending injection channels, characterized by the following features: (a) the nozzle head is provided as a plate-like head and projects beyond the diameter of the shaft by a multiple distance of the shaft diameter; (b) the nozzle head incorporates, at least, four radially extending injection channels; (c) the nozzle head comprises a plane ring face adjacent to the shaft, and an outer covering apron; (d) a copper ring is attached on the ring face; (e) the copper ring carries a spirally arranged high capacity coil heater; (f) the heating element for the nozzle head and the heating element for the shaft are independently controllable.
Claim 2
Dependent Claim
148 words
A multiple hot runner injection bush for lateral tunnel gating, with a foot and a shaft heated by a heating element and a central hot sprue arranged therein, furthermore, with a nozzle head heated by a heating element wherein the nozzle head contains radially extending injection channels, characterized by the following features: (a) the nozzle head is provided as a plate-like head and projects beyond the diameter of the shaft by a multiple distance of the shaft diameter; (b) the nozzle head incorporates, at least, four radially extending injection channels; (c) the nozzle head comprises a plane ring face adjacent to the shaft, and an outer covering apron; (d) a copper ring is attached on the ring face; (e) the copper ring carries a spirally arranged high capacity coil heater; (f) the heating element for the nozzle head and the heating element for the shaft are independently controllable.
Claim 3
Dependent Claim
18 words
Multiple hot runner injection bush according to claim 1, characterized in that the nozzle head contains a thermoelement.
Claim 4
Dependent Claim
28 words
Multiple hot runner injection bush according to claim 1, characterized in that the copper ring comprises a spiral groove for the reception of the high capacity coil heater.
Claim 5
Dependent Claim
27 words
Multiple hot runner injection bush according to claim 3, characterized in that the copper ring with the high capacity coil heater is closed by a cover ring.
Claim 6
Dependent Claim
23 words
Multiple hot runner injection bush according to claim 4, characterized in that a high capacity coil heater is wound helically on the shaft.
Claim 7
Dependent Claim
24 words
Multiple hot runner injection bush according to claim 5, characterized in that a shaft tube encloses the high capacity coil heater on the shaft.
Claim 8
Dependent Claim
23 words
Multiple hot runner injection bush according to claim 6, characterized in that a thermoelement is arranged in an axial slot of the shaft.
Claim 9
Dependent Claim
18 words
Multiple hot runner injection bush according to claim 1, characterized in that the foot comprises a separate heater.
Claim 10
Dependent Claim
24 words
Multiple hot runner injection bush according to claim 1, characterized in that the front face of the head comprises a galvanic heat insulating layer.
References Cited (Backward Citations)
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CH622985A5
Cited
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |