US4770836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing components with accurate surfaces
Assignee: MT Aerospace AG
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Filing: 1986-06-06
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Granted: 1988-09-13
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Expires: 2006-06-06
Abstract
Abstract In the case of a method and an apparatus for producing parts with high quality surfaces using a mold and curing resin, such as epoxy resin, the first step is to place a workpiece blank so that there is minimum gap between it and the mold. Then resin is introduced into the gap in a non-separating flow utilizing capillary forces in the gap. The epoxy resin then cures and the workpiece coated with such epoxy resin is separated from the mold.
Inventors
- 👤 Jochen Vetter
- 👤 Walter Klinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:14
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/18; B29C31/00; B29C31/04; B29C31/041; B29C39/00; B29C39/22; B29C39/26; B29C43/32; B29C43/34; B29C70/00; B29C70/68; B29C70/78; H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; B29K; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/34; B29L2031/3456
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A method of forming a high quality surface on a workpiece, comprising the steps of placing said workpiece with an inaccurate surface thereon adjacent to a mold with a high quality surface corresponding to said eventual high quality workpiece surface to be produced, placing a shim means between said workpiece and said mold to define a minimum gap therebetween, introducing a curable resin into said gap at the lowest vertical point of said gap, said resin flowing into said gap in a non-separating manner and substantially solely under the action of capillary forces, removing said shim means after introducing said resin so as to keep the shim means clear of said resin, reducing the width of said gap by weight means relatively pressing said mold and said workpiece towards each other and by mechanical means pressing said mold and said workpiece towards each other, allowing said resin to cure, and removing said workpiece from said mold with said resin thereon as a coating.
Claim 2
Independent Claim
163 words
A method of forming a high quality surface on a workpiece, comprising the steps of placing said workpiece with an inaccurate surface thereon adjacent to a mold with a high quality surface corresponding to said eventual high quality workpiece surface to be produced, placing a shim means between said workpiece and said mold to define a minimum gap therebetween, introducing a curable resin into said gap at the lowest vertical point of said gap, said resin flowing into said gap in a non-separating manner and substantially solely under the action of capillary forces, removing said shim means after introducing said resin so as to keep the shim means clear of said resin, reducing the width of said gap by weight means relatively pressing said mold and said workpiece towards each other and by mechanical means pressing said mold and said workpiece towards each other, allowing said resin to cure, and removing said workpiece from said mold with said resin thereon as a coating.
Claim 3
Dependent Claim
18 words
A method as claimed in claim 1, wherein said resin is introduced into said gap through said workpiece.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1, wherein after removing said shim means, said mold is fully supported by the resin above said workpiece.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 1, wherein after removing said shim means, said workpiece is fully supported by the resin above the mold.
Claim 6
Dependent Claim
52 words
A method as claimed in claim 1, wherein a foil is placed on the mold and said gap is between a side of said foil remote from said mold and said workpiece, and said resin bonds said foil to said workpiece, said resin being introduced into said gap from below said gap.
Claim 7
Dependent Claim
14 words
A method as claimed in claim 5, wherein said foil is a metallic foil.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 5, wherein said foil is a composite foil made up of metal with an organic coating thereon.
Claim 9
Dependent Claim
17 words
A method as claimed in claim 5, wherein said foil is applied to said mold by vacuum.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 5, wherein said foil is applied to said mold by a mechanical means.
Claim 11
Dependent Claim
14 words
A method as claimed in claim 1, wherein said resin is an epoxy resin.
References Cited (Backward Citations)
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US3026575A
Cited
GB2025838A
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |