METHOD AND APPARATUS FOR INJECTION MOULDING PLASTICS MATERIAL
The invention provides a method and apparatus for injection moulding a plastics article having thin and thick wall sections (14; 15). A quantity of molten plastics material (19) is introduced sufficient to fill the mould cavity, followed by a further quantity of molten plastics material sufficient t...
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| creator | CROW, KENNETH, RICHARD SAYER, MATTHEW, EMMETT |
| description | The invention provides a method and apparatus for injection moulding a plastics article having thin and thick wall sections (14; 15). A quantity of molten plastics material (19) is introduced sufficient to fill the mould cavity, followed by a further quantity of molten plastics material sufficient to pack at least the portion or portions of the mould cavity in which the thin wall section or sections (14) are formed. Pressurized fluid is introduced through the or each fluid injection member to penetrate the plastics material whereby a fluid-filled void (20) is formed within the plastics material adjacent to the inner end of the fluid injecting member, and fluid pressure is maintained within the or each void so that the void expands in response to the shrinkage of the immediately surrounding plastics material, during cooling, until the plastics material is self-supporting.
L'invention concerne un procédé et un dispositif servant à mouler par injection un article en plastique dont la paroi doit présenter des parties minces et des parties épaisses (14, 15). On introduit une quantité de matière plastique (19) en fusion suffisante pour remplir la cavité du moule, et on introduit ensuite une autre quantité de matière plastique en fusion suffisante pour remplir au moins la partie ou les parties de la cavité du moule permettant d'obtenir la ou les parties (14) de paroi mince. On introduit un liquide sous pression par un ou plusieurs éléments d'injection de liquide afin que ce liquide pénètre dans la matière plastique, ce qui produit un vide (20) rempli de liquide à l'intérieur de la matière plastique contiguë à l'extrémité intérieure de l'élément d'injection de liquide, et on maintient la pression du liquide à l'intérieur du vide, ou de chaque vide, de façon à dilater ce vide en réaction au retrait de la matière plastique située à proximité étroite de ce vide, pendant le refroidissement, jusqu'à ce que la matière plastique soit autonome. |
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L'invention concerne un procédé et un dispositif servant à mouler par injection un article en plastique dont la paroi doit présenter des parties minces et des parties épaisses (14, 15). On introduit une quantité de matière plastique (19) en fusion suffisante pour remplir la cavité du moule, et on introduit ensuite une autre quantité de matière plastique en fusion suffisante pour remplir au moins la partie ou les parties de la cavité du moule permettant d'obtenir la ou les parties (14) de paroi mince. On introduit un liquide sous pression par un ou plusieurs éléments d'injection de liquide afin que ce liquide pénètre dans la matière plastique, ce qui produit un vide (20) rempli de liquide à l'intérieur de la matière plastique contiguë à l'extrémité intérieure de l'élément d'injection de liquide, et on maintient la pression du liquide à l'intérieur du vide, ou de chaque vide, de façon à dilater ce vide en réaction au retrait de la matière plastique située à proximité étroite de ce vide, pendant le refroidissement, jusqu'à ce que la matière plastique soit autonome.</description><edition>7</edition><language>eng ; fre</language><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ; BASIC ELECTRIC ELEMENTS ; CHEMISTRY ; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ; ELECTRICITY ; FREQUENCY-CHANGING ; INORGANIC CHEMISTRY ; METALLURGY ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PERFORMING OPERATIONS ; PHYSICS ; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE ; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR ; SHAPING OR JOINING OF PLASTICS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF ; TRANSPORTING ; WAVEGUIDES ; WORKING OF PLASTICS ; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><creationdate>2001</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=20011108&DB=EPODOC&CC=WO&NR=0183190A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25562,76317</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20011108&DB=EPODOC&CC=WO&NR=0183190A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CROW, KENNETH, RICHARD</creatorcontrib><creatorcontrib>SAYER, MATTHEW, EMMETT</creatorcontrib><title>METHOD AND APPARATUS FOR INJECTION MOULDING PLASTICS MATERIAL</title><description>The invention provides a method and apparatus for injection moulding a plastics article having thin and thick wall sections (14; 15). A quantity of molten plastics material (19) is introduced sufficient to fill the mould cavity, followed by a further quantity of molten plastics material sufficient to pack at least the portion or portions of the mould cavity in which the thin wall section or sections (14) are formed. Pressurized fluid is introduced through the or each fluid injection member to penetrate the plastics material whereby a fluid-filled void (20) is formed within the plastics material adjacent to the inner end of the fluid injecting member, and fluid pressure is maintained within the or each void so that the void expands in response to the shrinkage of the immediately surrounding plastics material, during cooling, until the plastics material is self-supporting.
L'invention concerne un procédé et un dispositif servant à mouler par injection un article en plastique dont la paroi doit présenter des parties minces et des parties épaisses (14, 15). On introduit une quantité de matière plastique (19) en fusion suffisante pour remplir la cavité du moule, et on introduit ensuite une autre quantité de matière plastique en fusion suffisante pour remplir au moins la partie ou les parties de la cavité du moule permettant d'obtenir la ou les parties (14) de paroi mince. On introduit un liquide sous pression par un ou plusieurs éléments d'injection de liquide afin que ce liquide pénètre dans la matière plastique, ce qui produit un vide (20) rempli de liquide à l'intérieur de la matière plastique contiguë à l'extrémité intérieure de l'élément d'injection de liquide, et on maintient la pression du liquide à l'intérieur du vide, ou de chaque vide, de façon à dilater ce vide en réaction au retrait de la matière plastique située à proximité étroite de ce vide, pendant le refroidissement, jusqu'à ce que la matière plastique soit autonome.</description><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CHEMISTRY</subject><subject>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</subject><subject>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</subject><subject>ELECTRICITY</subject><subject>FREQUENCY-CHANGING</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>NON-LINEAR OPTICS</subject><subject>OPTICAL ANALOGUE/DIGITAL CONVERTERS</subject><subject>OPTICAL LOGIC ELEMENTS</subject><subject>OPTICS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE</subject><subject>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</subject><subject>SHAPING OR JOINING OF PLASTICS</subject><subject>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><subject>TRANSPORTING</subject><subject>WAVEGUIDES</subject><subject>WORKING OF PLASTICS</subject><subject>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2001</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLD1dQ3x8HdRcPQD4oAAxyDHkNBgBTf_IAVPPy9X5xBPfz8FX_9QHxdPP3eFAB_H4BBP52AFX8cQ1yBPRx8eBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnJqXWhIf7m9gaGFsaGngaGhMhBIA5Xwpmg</recordid><startdate>20011108</startdate><enddate>20011108</enddate><creator>CROW, KENNETH, RICHARD</creator><creator>SAYER, MATTHEW, EMMETT</creator><scope>EVB</scope></search><sort><creationdate>20011108</creationdate><title>METHOD AND APPARATUS FOR INJECTION MOULDING PLASTICS MATERIAL</title><author>CROW, KENNETH, RICHARD ; SAYER, MATTHEW, EMMETT</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO0183190A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2001</creationdate><topic>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CHEMISTRY</topic><topic>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</topic><topic>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</topic><topic>ELECTRICITY</topic><topic>FREQUENCY-CHANGING</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>NON-LINEAR OPTICS</topic><topic>OPTICAL ANALOGUE/DIGITAL CONVERTERS</topic><topic>OPTICAL LOGIC ELEMENTS</topic><topic>OPTICS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICS</topic><topic>RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE</topic><topic>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</topic><topic>SHAPING OR JOINING OF PLASTICS</topic><topic>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</topic><topic>TRANSPORTING</topic><topic>WAVEGUIDES</topic><topic>WORKING OF PLASTICS</topic><topic>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</topic><toplevel>online_resources</toplevel><creatorcontrib>CROW, KENNETH, RICHARD</creatorcontrib><creatorcontrib>SAYER, MATTHEW, EMMETT</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>CROW, KENNETH, RICHARD</au><au>SAYER, MATTHEW, EMMETT</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD AND APPARATUS FOR INJECTION MOULDING PLASTICS MATERIAL</title><date>2001-11-08</date><risdate>2001</risdate><abstract>The invention provides a method and apparatus for injection moulding a plastics article having thin and thick wall sections (14; 15). A quantity of molten plastics material (19) is introduced sufficient to fill the mould cavity, followed by a further quantity of molten plastics material sufficient to pack at least the portion or portions of the mould cavity in which the thin wall section or sections (14) are formed. Pressurized fluid is introduced through the or each fluid injection member to penetrate the plastics material whereby a fluid-filled void (20) is formed within the plastics material adjacent to the inner end of the fluid injecting member, and fluid pressure is maintained within the or each void so that the void expands in response to the shrinkage of the immediately surrounding plastics material, during cooling, until the plastics material is self-supporting.
L'invention concerne un procédé et un dispositif servant à mouler par injection un article en plastique dont la paroi doit présenter des parties minces et des parties épaisses (14, 15). On introduit une quantité de matière plastique (19) en fusion suffisante pour remplir la cavité du moule, et on introduit ensuite une autre quantité de matière plastique en fusion suffisante pour remplir au moins la partie ou les parties de la cavité du moule permettant d'obtenir la ou les parties (14) de paroi mince. On introduit un liquide sous pression par un ou plusieurs éléments d'injection de liquide afin que ce liquide pénètre dans la matière plastique, ce qui produit un vide (20) rempli de liquide à l'intérieur de la matière plastique contiguë à l'extrémité intérieure de l'élément d'injection de liquide, et on maintient la pression du liquide à l'intérieur du vide, ou de chaque vide, de façon à dilater ce vide en réaction au retrait de la matière plastique située à proximité étroite de ce vide, pendant le refroidissement, jusqu'à ce que la matière plastique soit autonome.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRICITY FREQUENCY-CHANGING INORGANIC CHEMISTRY METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING WAVEGUIDES WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | METHOD AND APPARATUS FOR INJECTION MOULDING PLASTICS MATERIAL |
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