US4420447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing foam moldings with an insert
Assignee: Tokai Chemical Industries Ltd
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Filing: 1982-01-05
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Granted: 1983-12-13
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Expires: 2002-01-05
Abstract
Abstract Process for producing foam moldings with an insert executed in a mold for foam molding consisting of a core block and a cavity block. The process comprises steps of: (a) having a film adhering to and covering the insert on one side thereof where a foam layer is formed; (b) letting the skirt portion of the film to be pinched or sandwiched by the uniting portion of the two blocks while the foaming process is executed on a foamable material; and (c) forming integrally the foam layer on that side of the insert, with the film being retained between the insert and the foam layer to be obtained.
Inventors
- 👤 Akira Nakashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/35; B29C44/351; B29C33/00; B29C33/12; B29C44/02; B29C44/12; B29C70/00; B29C70/68; B29C44/14; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/30; B29L2031/3005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
204 words
A process for producing a foam molding including an insert of predetermined shape wherein the insert is set in a mold consisting essentially of a core block and a cavity block for foaming a foamable material in a cavity defined in said mold so as to form a foamed body on one side of said insert, said process comprising the steps of: preparing an insert assembly consisting of said insert and a film having portions adhering to a surface of said insert on said one side thereof, said film extending so as to match a partial profile of said foamed body and covering a surface of said core and cavity blocks, said film further having skirt portions adapted to extend between respective joining portion of said core and cavity blocks; setting said insert assembly on said one of the core and cavity blocks such that said skirt portions extend over the surface of said joining portion of the one block; enclosing said cavity by joining said core and cavity blocks such that said skirt portions are pinched by said joining portions; and pouring said foamable material into a space formed between said film and a surface of the other blocks to define said cavity.
Claim 2
Dependent Claim
204 words
A process for producing a foam molding including an insert of predetermined shape wherein the insert is set in a mold consisting essentially of a core block and a cavity block for foaming a foamable material in a cavity defined in said mold so as to form a foamed body on one side of said insert, said process comprising the steps of: preparing an insert assembly consisting of said insert and a film having portions adhering to a surface of said insert on said one side thereof, said film extending so as to match a partial profile of said foamed body and covering a surface of said core and cavity blocks, said film further having skirt portions adapted to extend between respective joining portion of said core and cavity blocks; setting said insert assembly on said one of the core and cavity blocks such that said skirt portions extend over the surface of said joining portion of the one block; enclosing said cavity by joining said core and cavity blocks such that said skirt portions are pinched by said joining portions; and pouring said foamable material into a space formed between said film and a surface of the other blocks to define said cavity.
Claim 3
Dependent Claim
188 words
A process for producing a foam molding including at least one insert of predetermined shape wherein the insert is set in a mold consisting of a core block and a cavity block for foaming a foamable material in a cavity defined in said mold so as to form a foamed body on one side of said insert, said process comprising the steps of: setting said insert on one of said core and cavity blocks; covering a surface of said one of the core and cavity blocks with a film having portions adhering to a surface of said insert on said one side thereof, said film extending so as to match a partial profile of said foamed body and further having skirt portions adapted to extend between respective joining portions of said core and cavity blocks, said insert and said film constituting an insert assembly; enclosing said cavity by joining said core and cavity blocks such that said skirt portions are pinched by said joining portions; and pouring said foamable material into a space formed between said film and a surface of the other block to define said cavity.
Claim 4
Dependent Claim
188 words
A process for producing a foam molding including at least one insert of predetermined shape wherein the insert is set in a mold consisting of a core block and a cavity block for foaming a foamable material in a cavity defined in said mold so as to form a foamed body on one side of said insert, said process comprising the steps of: setting said insert on one of said core and cavity blocks; covering a surface of said one of the core and cavity blocks with a film having portions adhering to a surface of said insert on said one side thereof, said film extending so as to match a partial profile of said foamed body and further having skirt portions adapted to extend between respective joining portions of said core and cavity blocks, said insert and said film constituting an insert assembly; enclosing said cavity by joining said core and cavity blocks such that said skirt portions are pinched by said joining portions; and pouring said foamable material into a space formed between said film and a surface of the other block to define said cavity.
Claim 5
Dependent Claim
50 words
A process in accordance with claim 1 or 2, further comprising the step of setting a skin sheet on the surface of said other block before said foamable material is poured between said film and an inner surface of said skin sheet forming an outer shell of said foam molding.
Claim 6
Dependent Claim
40 words
A process in accordance with claim 1 or 2, further comprising the step of removing unnecessary parts of said film from the completed foam molding after the molding is released from said mold, said unnecessary parts including said skirt portions.
Claim 7
Dependent Claim
27 words
A process in accordance with claim 1 or 2, wherein said film is secured with adhesive to the surface of said insert on said one side thereof.
Claim 8
Dependent Claim
27 words
A process in accordance with claim 1 or 2, wherein said film is made of a synthetic resin and has a thickness not more than 2 mm.
Claim 9
Dependent Claim
24 words
A process in accordance with claim 1 or 2, wherein said film has a thickness in the range between 0.03 mm and 1.0 mm.
Claim 10
Dependent Claim
41 words
A process in accordance with claim 1 or 2, wherein said foamable material is a polyurethane premix composition and a foamed polyurethane body is formed on said one side of the insert due to foaming reaction of said polyurethane premix composition.
Claim 11
Dependent Claim
36 words
A process in accordance with claim 1 or 2, wherein said foamable material is poured into said cavity formed in said cavity block before said core block and said cavity block are joined and clamped together.
Claim 12
Dependent Claim
68 words
A process in accordance with claim 1 or 2, wherein said insert assembly including the film is set on the surface of said cavity block, said core block and said cavity block being subsequently joined together, and the foamable material being then poured into a foaming space formed between said film and said surface of the cavity block through at least one pour-hole bored in said core block.
References Cited (Backward Citations)
US2944170A
Cited
US3091946A
Cited
US3150796A
Cited
US3467741A
Cited
US3795722A
Cited
US3816837A
Cited
US4043022A
Cited
US4228115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |