METHOD OF MOLDING SYNTHETIC RESIN WITH HIGH ACCURACY
PURPOSE:To manufacture moldings of high planar accuracy with the low cost, which are useful for optical parts such as mirrors and lenses and have a shape faithfully profiling the shape of molds, by a method wherein resin is injected into the molds and molding is then performed while pressurizing the...
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| creator | KATSUMURA NOBUO NII TAMOTSU TOYOIZUMI YOSHITAKA |
| description | PURPOSE:To manufacture moldings of high planar accuracy with the low cost, which are useful for optical parts such as mirrors and lenses and have a shape faithfully profiling the shape of molds, by a method wherein resin is injected into the molds and molding is then performed while pressurizing the resin with movable parts of the molds. CONSTITUTION:Molds D1, D2 are held integral by a mold fastening force P and then heated up to injection temperatures. A given amount of resin is poured into a cavity C from an injection cylinder A. Next, a pressurizing piston Po is advanced to close a gate B, and the molds are heated to melt the injected resin and then cooled. At this time, pressurizing of the piston Po imparts pressure Pc against a movable core E of the mold to transmit a pressure to the cavity C. When the resin is hardened under continuous pressurizing in this way, the movable core E serves to reduce the volume of the cavity C attendant on volume reduction resulted from hardening, thus making it possible to manufacture moldings without sink mark. |
| format | Patent |
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CONSTITUTION:Molds D1, D2 are held integral by a mold fastening force P and then heated up to injection temperatures. A given amount of resin is poured into a cavity C from an injection cylinder A. Next, a pressurizing piston Po is advanced to close a gate B, and the molds are heated to melt the injected resin and then cooled. At this time, pressurizing of the piston Po imparts pressure Pc against a movable core E of the mold to transmit a pressure to the cavity C. When the resin is hardened under continuous pressurizing in this way, the movable core E serves to reduce the volume of the cavity C attendant on volume reduction resulted from hardening, thus making it possible to manufacture moldings without sink mark.</description><language>eng</language><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES ; PERFORMING OPERATIONS ; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE ; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR ; SHAPING OR JOINING OF PLASTICS ; TRANSPORTING ; WORKING OF PLASTICS ; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><creationdate>1984</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840507&DB=EPODOC&CC=JP&NR=S5978827A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840507&DB=EPODOC&CC=JP&NR=S5978827A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KATSUMURA NOBUO</creatorcontrib><creatorcontrib>NII TAMOTSU</creatorcontrib><creatorcontrib>TOYOIZUMI YOSHITAKA</creatorcontrib><title>METHOD OF MOLDING SYNTHETIC RESIN WITH HIGH ACCURACY</title><description>PURPOSE:To manufacture moldings of high planar accuracy with the low cost, which are useful for optical parts such as mirrors and lenses and have a shape faithfully profiling the shape of molds, by a method wherein resin is injected into the molds and molding is then performed while pressurizing the resin with movable parts of the molds. CONSTITUTION:Molds D1, D2 are held integral by a mold fastening force P and then heated up to injection temperatures. A given amount of resin is poured into a cavity C from an injection cylinder A. Next, a pressurizing piston Po is advanced to close a gate B, and the molds are heated to melt the injected resin and then cooled. At this time, pressurizing of the piston Po imparts pressure Pc against a movable core E of the mold to transmit a pressure to the cavity C. 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CONSTITUTION:Molds D1, D2 are held integral by a mold fastening force P and then heated up to injection temperatures. A given amount of resin is poured into a cavity C from an injection cylinder A. Next, a pressurizing piston Po is advanced to close a gate B, and the molds are heated to melt the injected resin and then cooled. At this time, pressurizing of the piston Po imparts pressure Pc against a movable core E of the mold to transmit a pressure to the cavity C. When the resin is hardened under continuous pressurizing in this way, the movable core E serves to reduce the volume of the cavity C attendant on volume reduction resulted from hardening, thus making it possible to manufacture moldings without sink mark.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | METHOD OF MOLDING SYNTHETIC RESIN WITH HIGH ACCURACY |
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