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US3706515A
Expired / Lapsed
US
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Device for feeding flowable material to a mold cavity
Assignee: Krauss Maffei Corp
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Filing: 1971-02-16
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Granted: 1972-12-19
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Expires: 1991-02-16
Abstract
Abstract A device for feeding flowable materials, e.g., a mixture of inter-reactive components, into a mold cavity, has a mixing chamber opening directly into the mold cavity without constriction and a pair of inlets connected to respective supply lines for the components. A control member or plunger is provided in the reaction chamber to close its outlet flush with a mold surface and is provided with grooves in a closed condition of the slider which create recirculation paths for the components when they are not fed to the mixing chamber.
Inventors
- 👤 Rudi Keuerleber
- 👤 Fritzwilhelm Pahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/76; B29B7/7615; B29B7/7663; B29B7/7673; B29B7/7471; B29B7/7605; B29B7/7631; B29B7/7636; B29B7/7642; B29B7/7652; B29B7/7684; B29B7/7689; B29B7/7694; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
An apparatus for charging a mold cavity with a mixture of at least two flowable components, comprising housing means forming a mixing chamber opening into said cavity at one end and provided with at least one pair of inlet ports communicating with said chamber and spaced from said end; and a control slide shiftable along said chamber for simultaneously regulating the flow of said components from said inlet ports into said chamber and out of said chamber into said cavity, said control slide having a first position wherein flow of said components from said chamber into said cavity is blocked and a second position in which flow of said components into said chamber and a mixture of the components into said cavity is permitted; wherein said control slide defines with said housing means respective recirculation channels communicating with said inlet ports in said first position of said control slide, said apparatus further comprising respective pumps communicating with said inlet ports for delivering said components thereto and having intake sides connected with the respective recirculation channels in said first position of said slide.
Claim 2
Independent Claim
182 words
An apparatus for charging a mold cavity with a mixture of at least two flowable components, comprising housing means forming a mixing chamber opening into said cavity at one end and provided with at least one pair of inlet ports communicating with said chamber and spaced from said end; and a control slide shiftable along said chamber for simultaneously regulating the flow of said components from said inlet ports into said chamber and out of said chamber into said cavity, said control slide having a first position wherein flow of said components from said chamber into said cavity is blocked and a second position in which flow of said components into said chamber and a mixture of the components into said cavity is permitted; wherein said control slide defines with said housing means respective recirculation channels communicating with said inlet ports in said first position of said control slide, said apparatus further comprising respective pumps communicating with said inlet ports for delivering said components thereto and having intake sides connected with the respective recirculation channels in said first position of said slide.
Claim 3
Dependent Claim
15 words
The apparatus defined in claim 1 wherein said control slide is received within said chamber.
Claim 4
Dependent Claim
56 words
The apparatus defined in claim 2 wherein said control slide is formed at least at its extremity turned toward said end of said mixing chamber with a cross section corresponding to the cross section of said cHamber and an end face adapted to lie flush with a wall of said mold cavity in said first position.
Claim 5
Dependent Claim
31 words
The apparatus defined in claim 3 wherein said control slide is formed with a central bore, further comprising a plunger slidably received in said bore and displaceable independently from said slide.
Claim 6
Dependent Claim
59 words
The apparatus defined in claim 4 wherein said slide is formed with respective transverse inwardly divergent frustoconical intermediate ports registering with said inlet ports respectively in said second position of said slide, each of said inlet ports being formed with a respective atomizing nozzle for directing the respective component into said mixing chamber and said bore through said ports.
Claim 7
Dependent Claim
39 words
The apparatus defined in claim 5 wherein said atomizing nozzles are each provided with means for imparting rotation to the component as it is introduced into said chamber, the sense of rotation being the same for both said components.
Claim 8
Dependent Claim
61 words
The apparatus defined in claim 6 wherein each of said atomizing nozzles includes a sleeve and a central body received within the sleeve and defining an annular clearance therewith, said sleeves having a conically convergent outlet and said central body having a conically convergent tip cooperating with the outlet to form a conically convergent gap communicating with the respective inlet port.
Claim 9
Dependent Claim
29 words
The apparatus defined in claim 7 wherein said sleeves are shiftable in said housing means, further comprising means for controlledly biasing said sleeves against juxtaposed faces of said slide.
Claim 10
Dependent Claim
30 words
The apparatus defined in claim 1, further comprising a transverse pin extending adjustably into said chamber between said inlet ports and said cavity for controlling the pressure of said mixture.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |