http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1084444-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b49199c4510e69c05d8a20cf3ca98e95 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C35-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C35-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C43-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C43-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29B13-00 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C35-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C35-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C43-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C43-52 |
| filingDate | 1964-11-20^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-09-20^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1084444-A |
| titleOfInvention | Process for moulding thermoplastic resins |
| abstract | 1,084,444. Moulding plastics. RUBBERMAID Inc. Nov. 20, 1964 [Nov. 22, 1963], No. 47344/64. Heading B5A. Thermoplastic resin material is moulded by heating the material to a viscous mass, preheating a separable mould to about the temperature of the viscous material, a mould part receiving the material to an amount exceeding the volume of the mould cavity, closing the mould under a pressure sufficient to conform the material to the mould cavity, cooling the mould until the material is below its distortion temperature, and opening the mould and removing the formed article. The material may be polyethylene, polyvinyl chloride, polystyrene, polypropylene, or acrylonitrile-butadiene-styrene. The material in the form of dry powder or granules may be mixed and heated in a mill or extruder to form a soft viscous mass. Globs of the mass are delivered to the mould cavity in an amount about 10% greater than the cavity capacity. The cavity is formed in a two-part mould, the parts being mounted in the platens of a standard press and being preheated to about 30‹ F. less than the temperature of the viscous mass. The mould is then closed under sufficient pressure, for example 100 to 500 p.s.i., to cause the material to fill the mould cavity, excess material being forced out along the parting line in the form of flash. The mould is then rapidly cooled, preferably by circulating cooling medium through the mould parts, to a temperature to about 14'0‹ F. or at least 140‹ F. below the moulding temperature. In forming certain articles, for example deep drawn containers, an increased follow-up pressure, for example 500 to 2000 p.s.i., to compensate for decreased volume of the material as it cools is applied until the material is cooled below its distortion point. Temperatures quoted for the materials are in the range 300‹ to 380‹ F., for the mould 270‹ to 330‹ F., and for the cooled material 120‹ to 210‹ F. It is stated that the time cycle for each moulding operation is about 2 minutes. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2740290-C1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2165797-A |
| priorityDate | 1963-11-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID453884384 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID24756 |
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