US3790136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die casting machine
Assignee: Desma Werke GmbH
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Filing: 1972-01-26
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Granted: 1974-02-05
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Expires: 1992-01-26
Abstract
Abstract A die casting machine is intended for sprayable materials, particularly artificial materials. The material is plastified in separate devices, particularly in an extruder and is supplied therefrom to a spraying aggregate which sprays the plastified material through an injection piston into the hollow space of a die cast mould. The invention is particularly characterized in that the injection piston is a rotary worm piston.
Inventors
- 👤 F Koch
- 👤 H Zeug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/47; B29C45/48; B29C44/00; B29C44/34; B29C44/3442; B29C44/36; B29C44/38; B29C44/42; B29C44/424; B29C44/425
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A die casting machine for sprayable materials, comprising two spaced extruders, a separate plastifying worm in each extruder, a spraying aggregate, a separate supply conduit connected with each extruder and having a throttle nipple connected to said spraying aggregate, said nipples being located on opposite sides of said spraying aggregate, a separate heating spiral enclosing each supply conduit, a rotary worm piston in said spraying aggregate, and means reciprocating said worm piston in said spraying aggregate.
Claim 2
Dependent Claim
76 words
A die casting machine for sprayable materials, comprising two spaced extruders, a separate plastifying worm in each extruder, a spraying aggregate, a separate supply conduit connected with each extruder and having a throttle nipple connected to said spraying aggregate, said nipples being located on opposite sides of said spraying aggregate, a separate heating spiral enclosing each supply conduit, a rotary worm piston in said spraying aggregate, and means reciprocating said worm piston in said spraying aggregate.
Claim 3
Dependent Claim
76 words
A die casting machine for sprayable materials, comprising two spaced extruders, a separate plastifying worm in each extruder, a spraying aggregate, a separate supply conduit connected with each extruder and having a throttle nipple connected to said spraying aggregate, said nipples being located on opposite sides of said spraying aggregate, a separate heating spiral enclosing each supply conduit, a rotary worm piston in said spraying aggregate, and means reciprocating said worm piston in said spraying aggregate.
Claim 4
Dependent Claim
76 words
A die casting machine for sprayable materials, comprising two spaced extruders, a separate plastifying worm in each extruder, a spraying aggregate, a separate supply conduit connected with each extruder and having a throttle nipple connected to said spraying aggregate, said nipples being located on opposite sides of said spraying aggregate, a separate heating spiral enclosing each supply conduit, a rotary worm piston in said spraying aggregate, and means reciprocating said worm piston in said spraying aggregate.
Claim 5
Dependent Claim
101 words
A die casting machine according to claim 1, wherein said spraying aggregate comprises an inner opening communicating said reciprocating means an outer spraying opening, a supply zone located adjacent said nipples and a mixing zone located between said supply zone and said outer opening, said worm piston having a helical core of lesser diameter in said supply zone than on both sides outside of said supply zone, an axial bore extending through the portion located in said supply zone and communicating with said reciprocating means and a radial bore hole connected with said axial bore and opening into said supply zone.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |