EP0188120A2
Expired / Lapsed
EP
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Moulding process
Assignee: BTG International Ltd
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Filing: 1985-12-20
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Granted: —
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Expires: 2005-12-20
Abstract
Abstract A moulding process, which process comprises:supplying molten, mouldable material to a mould cavity;subjecting at least a part of the supplied molten material to a shear force;causing the material to solidify while maintaining the shear force; and demoulding the moulded material.
Inventors
- 👤 Peter Stewart Allan
- 👤 Michael John Bevis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:00
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C45/00; B29C45/0082; B29C45/17; B29C45/46; B29C45/57; B29C67/00; B29C67/0003; B29C70/06; B29C70/10; B29C70/12; B29C70/14; B29C2045/0098; B29K; B29K2995/00; B29K2995/0037; B29K2995/0041; B29K2995/005; B29K2995/0088
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
43 words
A moulding process, which process comprises: supplying molten, mouldable material to a mould cavity; subjecting at least a part of the supplied molten material to a shear force; causing the material to solidify while maintaining the shear force; and demoulding the moulded material.
Claim 2
Dependent Claim
43 words
A moulding process, which process comprises: supplying molten, mouldable material to a mould cavity; subjecting at least a part of the supplied molten material to a shear force; causing the material to solidify while maintaining the shear force; and demoulding the moulded material.
Claim 3
Dependent Claim
13 words
A moulding process according to Claim 1 which is an injection moulding process.
Claim 4
Dependent Claim
17 words
A moulding process according to Claim 1 or 2 wherein the mouldable material comprises a polymer material.
Claim 5
Dependent Claim
15 words
A moulding process according to Claim 3 wherein the polymer material comprises a thermoplastic polymer.
Claim 6
Dependent Claim
15 words
A moulding process according to Claim 4 wherein the thermoplastic polymer comprises a semicrystalline polymer.
Claim 7
Dependent Claim
30 words
A moulding process according to any of Claims 3 to 5 wherein the polymer material is a homo- or copolyolefin, or a blend thereof with one or more other polymers.
Claim 8
Dependent Claim
14 words
A moulding process according to any preceding claim wherein the mouldable material is filled.
Claim 9
Dependent Claim
22 words
A moulding process according to any of the preceding claims 3 to 7 wherein the polymer material comprises a liquid crystalline polymer.
Claim 10
Dependent Claim
21 words
A moulding process according to any of the preceding claims 3 to 8 wherein the polymer material comprises a thermosetting polymer.
Claim 11
Dependent Claim
66 words
A moulding process according to any preceding claim wherein the supplied molten material is subjected to a shear force by applying a periodic force to each of a plurality of regions of the molten material, there being a difference in the periodic forces applied to at least two different such regions effective to cause shear of the molten material at least between the two such regions.
Claim 12
Dependent Claim
28 words
A moulding process according to any preceding claim wherein the periodic forces applied to at least two different regions of the molten material are of the same frequency.
Claim 13
Dependent Claim
30 words
A moulding process according to any preceding claim wherein the periodic forces applied to at least two different regions of the molten material are out of phase with each other.
Claim 14
Dependent Claim
23 words
A moulding process according to any preceding claim wherein the periodic forces are applied to at least two different regions of the melt.
Claim 15
Dependent Claim
34 words
A moulding process according to any preceding claim wherein, immediately prior to solidification of the molten, mouldable material, the periodic forces are applied in phase to provide auxiliary packing force to the mould cavity.
Claim 16
Dependent Claim
45 words
Moulding apparatus which comprises a mould cavity and means for supplying molten, mouldable material thereto, and characterised by further comprising, interposed between the mould cavity and the supply means, means for applying a shear force to at least a part of any molten material supplied.
Claim 17
Dependent Claim
45 words
Moulding apparatus which comprises a mould cavity and means for supplying molten, mouldable material thereto, and characterised by further comprising, interposed between the mould cavity and the supply means, means for applying a shear force to at least a part of any molten material supplied.
Claim 18
Dependent Claim
45 words
Moulding apparatus according to Claim 15 wherein the means for applying a shear force includes means for dividing the supplied molten, mouldable material into a plurality of regions of the molten material; and means for applying periodic forces to at least two different such regions.
Claim 19
Dependent Claim
14 words
Moulding apparatus according to Claim 15 or 16 which comprises an injection moulding apparatus.
Claim 20
Dependent Claim
15 words
A moulded article wherever prepared by the process of any of Claims 1 to 14.
Claim 21
Dependent Claim
14 words
A moulded article according to Claim 18 which is substantially free from weld lines.
Claim 22
Dependent Claim
13 words
A moulded article according to Claim 18 or 19 which comprises a filler.
Claim 23
Dependent Claim
12 words
A moulded article according to Claim 20 wherein the filler is fibrous.
Claim 24
Dependent Claim
22 words
A moulded article according to any of Claims 18 to 21 which comprises in at least one portion thereof, an oriented core.
Claim 25
Dependent Claim
12 words
An injection moulded article according to any of Claims 18 to 22.
References Cited (Backward Citations)
No citation records indexed.
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