US4726412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high melting point metallic molds
Assignee: Rhone Poulenc Specialites Chimiques
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Filing: 1985-11-07
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Granted: 1988-02-23
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Expires: 2005-11-07
Abstract
Abstract High melting point metallic, e.g., steel mold members are facilely and inexpensively produced by depositing, e.g., flame-spraying, droplets of a melt of a metal having a high melting point onto the front face surface of an elastomeric silicone mold pattern, said elastomeric silicone containing from 20 to 90% by weight of finely divided particulates of at least one refractory filler, and thereafter permitting said melt to solidify.
Inventors
- 👤 Elie Magnan
- 👤 Robert Guillermond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:40
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; B29C33/56; B29K; B29K2705/00; B29K2883/00; Y; Y10; Y10S; Y10S29/00; Y10S29/039
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
89 words
A process for the production of a metal mold member, comprising spraying a melt of a metal having a melting point of at least 1000° C. onto the front face surface of an elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
Claim 2
Dependent Claim
89 words
A process for the production of a metal mold member, comprising spraying a melt of a metal having a melting point of at least 1000° C. onto the front face surface of an elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
Claim 3
Dependent Claim
35 words
The process as defined by claim 1, comprising spraying a thin layer of said molten metal onto said elastomeric silicon mold pattern, said thin layer ranging in thickness from a few micrometers to several centimeters.
Claim 4
Dependent Claim
23 words
The process as defined by claim 1, wherein said front face surface of the elastomeric silicon mold pattern before said depositing is roughened.
Claim 5
Dependent Claim
20 words
The process as defined by claim 1, wherein said molten metal has a melting point of at least 1200° C.
Claim 6
Dependent Claim
20 words
The process as defined by claim 1, wherein said molten metal has a melting point of at least 1400° C.
Claim 7
Dependent Claim
21 words
The process as defined by claim 1, said finely divided refractory filler particulates having a mean particle size below 300 μm.
Claim 8
Dependent Claim
24 words
The process as defined by claim 6, said finely divided refractory filler particulates having a mean particle size ranging from 1 to 100 μm.
Claim 9
Dependent Claim
24 words
The process as defined by claim 1, said elastomeric silicone containing from 40 to 70% by weight of said finely divided refractory filler particulates.
Claim 10
Dependent Claim
41 words
The process as defined by claim 1, said finely divided refractory filler particulates comprising ferric oxide, crystallized alumina, alumina hydrate, diatomaceous earth, pyrogenic silica, zirconia, chromium oxide, titanium oxide, barium sulfate, lithopone, talc, rare earth oxide, a silicozirconate, or mixture thereof.
Claim 11
Dependent Claim
21 words
The process as defined by claim 1, said elastomeric silicone mold pattern having a thickness ranging from 2 to 20 mm.
Claim 12
Dependent Claim
39 words
The process as defined by claim 1, the front face surface of said elastomeric silicone mold pattern before said depositing being provided with a thin metallic film adopted to enhance the adhesion of said high melting molten metal thereto.
Claim 13
Dependent Claim
15 words
The process as defined by claim 11, said thin metallic film being provided by spraying.
Claim 14
Dependent Claim
23 words
The process as defined by claim 11, said thin metallic film having a thickness of from about 5 microns to about 5/10 millimeters.
Claim 15
Dependent Claim
19 words
The process as defined by claim 11, said thin metallic film comprising a metal having a low melting point.
Claim 16
Dependent Claim
21 words
The process as defined by claim 14, said low melting point metal comprising bismuth, lead, tin, zinc, aluminum, or alloy thereof.
Claim 17
Dependent Claim
20 words
The process as defined by claim 1, said high melting point metal comprising a steel, stainless steel or specialty steel.
Claim 18
Dependent Claim
23 words
The process as defined by claim 1, wherein up to 30% of said refractory filler particulates is replaced by a heat transfer material.
Claim 19
Dependent Claim
20 words
The process as defined by claim 17, said heat transfer material comprising metal powder, or metal, metallized or refractory fibers.
Claim 20
Dependent Claim
30 words
The process as defined by claim 1, wherein up to 20% of said refractory filler particulates have been sprayed into the back face surface of said elastomeric silicone mold pattern.
Claim 21
Dependent Claim
20 words
The process as defined by claim 1, further comprising reinforcing the rear face surface of said elastomeric silicone mold pattern.
Claim 22
Dependent Claim
118 words
A process for the production of a metal mold member, comprising co-extensively depositing a layer of a curable organopolysiloxane onto the surface to be reproduced of a master model, curing said organopolysiloxane into an elastomeric silicone mold pattern, spraying droplets of a melt of a metal having a melting point of at least 1,000° C. onto the front face surface of said elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
Claim 23
Dependent Claim
118 words
A process for the production of a metal mold member, comprising co-extensively depositing a layer of a curable organopolysiloxane onto the surface to be reproduced of a master model, curing said organopolysiloxane into an elastomeric silicone mold pattern, spraying droplets of a melt of a metal having a melting point of at least 1,000° C. onto the front face surface of said elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
Claim 24
Dependent Claim
18 words
The process as defined by claim 21, said curable organopolysiloxane comprising an alpha,omega-dihydroxydiorganopolysiloxane and a cross-linking agent therefor.
Claim 25
Dependent Claim
78 words
An elastomeric mold pattern comprising a front faced surface defining a mold configuration to be reproduced by the spraying of molten metal, said front face surface having a Shore A hardness ranging from 61 to 79 and said front face surface having a peripherial region having a Shore A hardness of less than about 30, and said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler.
Claim 26
Dependent Claim
78 words
An elastomeric mold pattern comprising a front faced surface defining a mold configuration to be reproduced by the spraying of molten metal, said front face surface having a Shore A hardness ranging from 61 to 79 and said front face surface having a peripherial region having a Shore A hardness of less than about 30, and said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler.
Claim 27
Dependent Claim
16 words
The mold pattern as defined by claim 23, the rear face surface thereof comprising reinforcing means.
Claim 28
Dependent Claim
16 words
The mold pattern as defined by claim 24, said reinforcing means being adopted for heat transfer.
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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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |