Patent US5154872A successfully refreshed from Google Patents.
US5154872A
Expired / Lapsed
US
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Process for producing a multilayer molded article
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1991-05-13
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Granted: 1992-10-13
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Expires: 2011-05-13
Abstract
Abstract A multilayer molded article includes a resin body and skin material with good quality and is produced by a process which includes the steps of: (a) supplying a skin material between a male mold and a female mold which are attached to a clamping mechanism, (b) starting closing of the male and female molds, and supplying a resin melt for the resin body between the skin material and the male or female mold while temporarily stopping the closing action of the mold or adjusting a closing rate at 30 mm/sec. or less when a cavity clearance between the molds is in the range between (C+100) mm and (C+5) mm (wherein C is the cavity clearance when the molding is finished), and (c) further closing the molds to the cavity clearance of C to finish the molding.
Inventors
- 👤 Syohei Masui
- 👤 Nobuhiro Usui
- 👤 Masahito Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:57
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/14; B29C43/18; B29C43/183; B29C43/184; B29C45/00; B29C45/14; B29C45/1418; B29C45/17; B29C45/46; B29C45/56; B29C45/561; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/68; B29C70/78; B29C37/00; B29C2037/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
171 words
A process for producing a multilayer molded article comprising a resin body and a skin material wherein said skin material is a member selected from the group consisting of woven fabric, non-woven fabric, thermoplastic resin films and elastomer films, which method comprises the steps of: (a) supplying the skin material between a male mold and a female mold which are attached to clamping means, (b) starting closing of the male and female molds, and supplying a resin melt for the resin body between the skin material and one of the male and female mold while, temporarily stopping the closing action of the mold when a cavity clearance between the molds is in a range of between (C + 100) mm and (C + 5) mm, wherein C is the cavity clearance when the molding is finished, and (c) further closing the molds to the cavity clearance of C to finish the molding, wherein the mold closing is restarted before the resin supply is finished, and to produce the multilayered molded article.
Claim 2
Dependent Claim
171 words
A process for producing a multilayer molded article comprising a resin body and a skin material wherein said skin material is a member selected from the group consisting of woven fabric, non-woven fabric, thermoplastic resin films and elastomer films, which method comprises the steps of: (a) supplying the skin material between a male mold and a female mold which are attached to clamping means, (b) starting closing of the male and female molds, and supplying a resin melt for the resin body between the skin material and one of the male and female mold while, temporarily stopping the closing action of the mold when a cavity clearance between the molds is in a range of between (C + 100) mm and (C + 5) mm, wherein C is the cavity clearance when the molding is finished, and (c) further closing the molds to the cavity clearance of C to finish the molding, wherein the mold closing is restarted before the resin supply is finished, and to produce the multilayered molded article.
Claim 3
Dependent Claim
34 words
The process according to claim 1, wherein, in the step (b), the resin melt is supplied when the cavity clearance is in the range between (C + 100) mm and (C + 10) mm.
Claim 4
Dependent Claim
27 words
The process according to claim 1, wherein said resin melt comprises a thermoplastic resin selected from the group consisting of polypropylene, polyethylene, polystyrene, acrylonitrile-styrene-butadiene copolymer, and nylon.
Claim 5
Dependent Claim
25 words
The process according to claim 1, wherein said skin material is a member selected from the group consisting of polyolefins, polyvinyl chloride, polystyrene, and polyurethane.
Claim 6
Dependent Claim
18 words
The process according to claim 1, wherein the skin material is supported by setting pins in step (a).
Claim 7
Dependent Claim
43 words
The process according to claim 1, wherein the skin material is placed on a lower one of the male and female molds in step (a), and a shear clearance between the male and female molds is adjusted to about 0.1 to 1.0 mm.
Claim 8
Dependent Claim
173 words
A process for producing a multilayer molded article comprising a resin body and a skin material wherein said skin material is a member selected from the group consisting of woven fabric, non-woven fabric, thermoplastic resin films and elastomer films, which method comprises the steps of: (a) supplying the skin material between a male mold and a female mold which are attached to clamping means, (b) starting closing of the male and female molds, and supplying a resin melt for the resin body between the skin material and one of the male and female molds while adjusting a closing rate at 30 mm/sec. when a cavity clearance between the molds is in a range of between (C + 100) mm and (C + 5) mm, wherein C is the cavity clearance when the molding is finished and wherein the resin melt is supplied while adjusting the mold closing rate in a range between 0.1 mm/sec. and 20 mm/sec., and the moment when the resin supply is finished, and to produce the multilayered molded article.
Claim 9
Dependent Claim
173 words
A process for producing a multilayer molded article comprising a resin body and a skin material wherein said skin material is a member selected from the group consisting of woven fabric, non-woven fabric, thermoplastic resin films and elastomer films, which method comprises the steps of: (a) supplying the skin material between a male mold and a female mold which are attached to clamping means, (b) starting closing of the male and female molds, and supplying a resin melt for the resin body between the skin material and one of the male and female molds while adjusting a closing rate at 30 mm/sec. when a cavity clearance between the molds is in a range of between (C + 100) mm and (C + 5) mm, wherein C is the cavity clearance when the molding is finished and wherein the resin melt is supplied while adjusting the mold closing rate in a range between 0.1 mm/sec. and 20 mm/sec., and the moment when the resin supply is finished, and to produce the multilayered molded article.
Claim 10
Dependent Claim
27 words
The process according to claim 7, wherein said resin melt comprises a thermoplastic resin selected from the group consisting of polypropylene, polyethylene, polystyrene, acrylonitrile-styrene-butadiene copolymer, and nylon.
Claim 11
Dependent Claim
25 words
The process according to claim 7, wherein said skin material is a member selected from the group consisting of polyolefins, polyvinyl chloride, polystyrene, and polyurethane.
Claim 12
Dependent Claim
34 words
The process according to claim 7, wherein, in the step (b), the resin melt is supplied when the cavity clearance is in the range between (C + 100) mm and (C + 10) mm.
Claim 13
Dependent Claim
18 words
The process according to claim 7, wherein the skin material is supported by setting pins in step (a).
Claim 14
Dependent Claim
43 words
The process according to claim 7, wherein the skin material is placed on a lower one of the male and female molds in step (a), and a shear clearance between the male and female molds is adjusted to about 0.1 to 1.0 mm.
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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) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |