WO2008010600A1 - Manufacturing method of synthetic resin hollow body - Google Patents
Manufacturing method of synthetic resin hollow body Download PDFInfo
- Publication number
- WO2008010600A1 WO2008010600A1 PCT/JP2007/064536 JP2007064536W WO2008010600A1 WO 2008010600 A1 WO2008010600 A1 WO 2008010600A1 JP 2007064536 W JP2007064536 W JP 2007064536W WO 2008010600 A1 WO2008010600 A1 WO 2008010600A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hollow
- resin
- synthetic resin
- manufacturing
- molding
- Prior art date
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 121
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 121
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 70
- 238000000465 moulding Methods 0.000 claims abstract description 199
- 229920005989 resin Polymers 0.000 claims abstract description 155
- 239000011347 resin Substances 0.000 claims abstract description 155
- 239000000126 substance Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims description 54
- 239000002184 metal Substances 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 229920000554 ionomer Polymers 0.000 claims description 11
- 239000002537 cosmetic Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 238000000071 blow moulding Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000003570 air Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000011344 liquid material Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 15
- 239000011521 glass Substances 0.000 description 13
- 239000011162 core material Substances 0.000 description 12
- -1 Sc+++ Chemical compound 0.000 description 8
- 239000002131 composite material Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 150000001733 carboxylic acid esters Chemical class 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- FDSYTWVNUJTPMA-UHFFFAOYSA-N 2-[3,9-bis(carboxymethyl)-3,6,9,15-tetrazabicyclo[9.3.1]pentadeca-1(15),11,13-trien-6-yl]acetic acid Chemical compound C1N(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC2=CC=CC1=N2 FDSYTWVNUJTPMA-UHFFFAOYSA-N 0.000 description 1
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- IEPRKVQEAMIZSS-UHFFFAOYSA-N Di-Et ester-Fumaric acid Natural products CCOC(=O)C=CC(=O)OCC IEPRKVQEAMIZSS-UHFFFAOYSA-N 0.000 description 1
- IEPRKVQEAMIZSS-WAYWQWQTSA-N Diethyl maleate Chemical compound CCOC(=O)\C=C/C(=O)OCC IEPRKVQEAMIZSS-WAYWQWQTSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- XLYMOEINVGRTEX-ARJAWSKDSA-N Ethyl hydrogen fumarate Chemical compound CCOC(=O)\C=C/C(O)=O XLYMOEINVGRTEX-ARJAWSKDSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- OVPXRLUTUWRYEY-UHFFFAOYSA-N dimethyl naphthalene-1,8-dicarboxylate Chemical compound C1=CC(C(=O)OC)=C2C(C(=O)OC)=CC=CC2=C1 OVPXRLUTUWRYEY-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- XLYMOEINVGRTEX-UHFFFAOYSA-N fumaric acid monoethyl ester Natural products CCOC(=O)C=CC(O)=O XLYMOEINVGRTEX-UHFFFAOYSA-N 0.000 description 1
- NKHAVTQWNUWKEO-UHFFFAOYSA-N fumaric acid monomethyl ester Natural products COC(=O)C=CC(O)=O NKHAVTQWNUWKEO-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- NKHAVTQWNUWKEO-IHWYPQMZSA-N methyl hydrogen fumarate Chemical compound COC(=O)\C=C/C(O)=O NKHAVTQWNUWKEO-IHWYPQMZSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C2045/1445—Coating a portion of the article, e.g. the edge of the article injecting a part onto a blow moulded object
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/718—Cosmetic equipment, e.g. hair dressing, shaving equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0018—Ribs
- B65D2501/0045—Solid ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0081—Bottles of non-circular cross-section
Definitions
- the present invention relates to a manufacturing method of a synthetic resin hollow body (A) for holding a liquid material having a flow property such as a cosmetic solution, a chemical, and drinking water.
- a container for holding a liquid material such as a cosmetic solution, a chemical, and drinking water
- a container with a cap having an excellent corrosion resistance and a satisfactory airtight property has been widely used.
- the container is generally made of a glass.
- a metal container can also be used to obtain similar effects.
- the glass container has a dignity sense and a high quality sense, thereby being suitably used for a container of a cosmetic solution in particular.
- the glass container may be easily damaged by a shock during a carrying operation or by a drop in use.
- the metal container has an excellent shock resistance in particular. However, a weight and a raw material cost thereof are increased, and a processing thereof has a lot of trouble.
- the glass container and metal container are in a simple shape, thereby being lacking in a decorating property.
- Patent document 1 proposes a composite container 104 in which a resin is over-molded on a container 100 made of a glass or a metal to form a resin sheathing body 102 outside the container 100 in order to add a design property.
- the container is made of a synthetic resin
- the container is manufactured by a method such as a blow molding method and a method of forming two divided molding bodies in advance and of welding the two bodies using a vibration welding method, thereby reducing a manufacturing cost and enabling a mass production.
- the blow- molding method just enables a formation of only a thin-walled container. Consequently, a shape of the container is restricted to a certain degree, thereby being lacking in a decorating property in some cases.
- the method of welding the two divided molding bodies using a vibration welding method enables a manufacture of a container in a free shape as compared with the blow molding method.
- a material of the container is restricted to a costly resin having an excellent chemical resistance, thereby increasing a resin cost disadvantageously.
- Patent document 2 discloses a synthetic resin hollow body 206 as shown in Fig. 11.
- an inner shell 200 is formed at first by combining divided molding bodies or by a blow molding method.
- a molten resin made of a material equivalent to or other than that of the inner shell 200 is then injected outside the inner shell to form an over-molded portion 202, thereby integrating the over-molded portion 202 with the inner shell 200.
- Such a synthetic resin hollow body 206 has a two-layer structure, thereby further improving a decorating property. Moreover, a resin having an excellent chemical resistance can be used for only the inner shell 200, and a comparatively low cost resin can be used outside the inner shell, thereby reducing a total resin cost for the synthetic resin hollow body 206.
- Patent document 1 Japanese Unexamined Patent Application Publication No. 2004-527424
- Patent document 2 Japanese Patent Application Laid-Open Publication No. 06-23758
- a material of the core container 100 is a glass or a metal, thereby restricting processability to a certain degree. Consequently, a degree of freedom for a design is insufficient and not satisfactory.
- the glass container 100 in such a composite container 104 is covered by the resin sheathing body 102.
- the core container 100 is made of a glass, a damage caused by a drop cannot be prevented in many cases.
- the composite container 104 is made of a combination of different materials composed of a glass and a resin.
- Patent document 2 a thickening material such as a super absorbent resin is injected into the inner shell 200 in advance, and is frozen and hardened to be a core material 204 before set in a metal mold 208, in such a manner that the inner shell 200 is prevented from being deformed or damaged by a resin pressure of a molten resin in the case in which a molten resin is injected outside the inner shell 200 in an integrating manner.
- the core material 204 in the inner shell 200 must be molten and removed. Consequently, there are many complicated operation processes.
- the present invention was made in consideration of such conditions, and an object of the present invention is to provide a manufacturing method of a synthetic resin hollow body capable of suppressing a product cost and an operation cost.
- (a) in accordance with the present invention is characterized by comprising the step of injecting the molten resin for an over-molding under the state in which the hollow molding body (a) is partially or wholly filled with a fluid substance.
- the hollow molding body (a) can be prevented from being deformed by a resin pressure in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is reliably covered by the resin sheathing body in an integrating manner.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the resin sheathing body is preferably welded to an external surface of the hollow molding body (a) .
- the resin sheathing body is welded to an external surface of the hollow molding body (a) , thereby preventing the hollow molding body (a) from wobbling or rotating inside the resin sheathing body.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized by comprising the steps of filling partially or wholly the hollow molding body (a) with a liquid as a fluid substance; attaching a cap member to the opening portion; setting the hollow molding body (a) holding the liquid inside to a metal mold; and injecting a molten resin for an over-molding, wherein the liquid is one of water, an aqueous solution, a cosmetic solution, a chemical, and an organic solvent.
- a fluid substance (a liquid in particular) can be prevented from scattering externally out of the opening portion, and the hollow molding body (a) can be safely set to a metal mold even in the case in which the fluid substance such as a chemical accompanied by a danger in a handling is used.
- the hollow molding body (a) can be prevented from being deformed by a resin pressure in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is reliably covered by the resin sheathing body in an integrating manner.
- the fluid substance is water
- the synthetic resin hollow body (A) after the synthetic resin hollow body (A) is manufactured, only removing water and drying enable a desired cosmetic solution or the like to be newly held, thereby facilitating the manufacturing.
- the synthetic resin hollow body (A) can be a product for a market immediately after the manufacturing, thereby further facilitating the manufacturing process.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a boiling point of the liquid is preferably at least 50 0 C.
- a boiling point of the liquid is preferably at least 50 0 C.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the fluid substance is a gas preferably.
- the synthetic resin hollow body (A) can be a product for a market immediately after the over-molding, thereby further improving productivity as compared with the case in which the fluid substance is a liquid.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the gas is preferably one of air, nitrogen, oxygen, an inert gas, and a carbon dioxide gas.
- the hollow molding body (a) can be reliably prevented from being deformed by an injection pressure in an injection.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the gas is blown into the hollow molding body (a) in an injection of the molten resin, and a gas pressure in the hollow molding body (a) in a period of a cooling of the molten resin is preferably held to be lower than the blowing pressure of the gas blown in the injection of the molten resin in the case in which the molten resin is injected into the metal mold.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a pressure of the gas to be blown into the hollow molding body (a) is preferably in the range of 0.04 to 1.0 MPa in a period from the start to the end of the injection of the molten resin.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a pressure of the gas in the hollow molding body (a) is preferably in the range of 0.02 to 0.5 MPa in a period of the cooling of the molten resin.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a molding temperature is in the range of 100 0 C to 300 0 C and an injection pressure is in the range of 20 to 150 kg/cm 3 preferably in the case in which the molten resin is injected into the metal mold. [0030]
- the fluid substance can be prevented from being vaporized in a metal mold in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is safely and reliably covered by the resin sheathing body in an integrating manner.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the molten resin to be injected into the metal mold is preferably an ionomer resin.
- the hollow molding body (a) is clearly visible via the • resin sheathing body.
- the resin sheathing body has an extremely high transparency, thereby greatly improving a high quality sense, an aesthetic appreciation, and an appearance property.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is preferably formed by a blow molding method or a method of welding two divided molding bodies using a vibration welding method. [0033] By forming the hollow molding body (a) by such a method as described above, a mass production is possible and a manufacturing cost can be reduced, thereby also manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is covered by the resin sheathing body in an integrating manner at a low cost. [0034]
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is a thin- walled molding body preferably.
- the hollow molding body (a) is a thin-walled molding body, in the case in which the hollow molding body (a) is integrated with the resin sheathing body, the boundary line between the both members is hardly visible, thereby obtaining the synthetic resin hollow body (A) having an improved aesthetic appreciation.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a thickness of the resin sheathing body is at least 1 mm preferably.
- the manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is a hollow molding container preferably.
- the hollow molding body (a) is a hollow molding container, a liquid material such as a cosmetic solution, a chemical, and drinking water does not leak and can be held reliably.
- the present invention can provide a manufacturing method of a synthetic resin hollow body (A) capable of suppressing a product cost and an operation cost by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin.
- the present invention can also provide a manufacturing method of a synthetic resin hollow body (A) that has a satisfactory decorating property by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin.
- the present invention can provide a manufacturing method of a synthetic resin hollow body (A) that is hardly damaged even in the case in which the synthetic resin hollow body is dropped, by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin.
- the present invention can provide a manufacturing method of a synthetic resin hollow body (A) that is not required to be separated in a disposal, thereby having a satisfactory recycle property, by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin.
- a crack may easily occur during an over-molding of a resin sheathing body.
- the present invention adopts a hollow molding body (a) made of a resin, thereby facilitating an over-molding.
- Fig. 1 is a perspective view showing a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
- Fig. 2 is a cross-sectional view showing a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
- Fig. 3 is a perspective view showing a synthetic resin hollow body (A) in accordance with another embodiment of the present invention.
- Fig. 4 is a perspective view showing a synthetic resin hollow body (A) in accordance with another embodiment of the present invention.
- Fig. 5 shows a hollow molding body (a) in accordance with another embodiment of the present invention.
- Fig. 5 (a) shows a hollow molding body (a) with a cap opened, and
- Fig. 5(b) shows the hollow molding body of Fig. 5 (a) that holds a liquid as a fluid substance and that is closed by a cap member.
- Fig. 6 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
- Fig. 6 (a) shows a state in which a hollow molding body (a) is set in a metal mold
- Fig. 6 (b) shows a state in which the metal mold is closed
- Fig. 6(c) shows a state in which a resin sheathing body is filled with in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body.
- Fig. 7 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
- Fig. 7 (a) shows a state in which the metal mold is opened
- Fig. 7 (b) shows a state in which the synthetic resin hollow body (A) is detached from the metal mold.
- Fig. 8 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with another embodiment of the present invention.
- Fig. 8 (a) shows a state in which a hollow molding body (a) is set in a metal mold
- Fig. 8 (b) shows a state in which the metal mold is closed
- Fig. 8 (c) shows a state in which a resin sheathing body- is filled with in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body.
- Fig. 9 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with another embodiment of the present invention.
- Fig. 9 (a) shows a state in which the metal mold is opened
- Fig. 9 (b) shows a state in which the synthetic resin hollow body (A) is detached from the metal mold.
- Fig. 10 is a perspective view showing a conventional composite container.
- Fig. 11 is a process drawing illustrating a conventional manufacturing method of a synthetic resin hollow body (A) .
- resin sheathing body 104 composite container 200: inner shell 202: over-molded portion 204: core material 206: synthetic resin hollow body 208: metal mold
- Fig. 1 is a view showing a synthetic resin hollow body
- Fig. 2 is a cross-sectional view showing the synthetic resin hollow body (A) of Fig. 1.
- Figs. 3 and 4 are views showing other embodiments of a synthetic resin hollow body (A).
- 5 to 7 illustrate an embodiment of a method for manufacturing a synthetic resin hollow body (A) .
- a synthetic resin hollow body (A) in accordance with the present invention is for holding a liquid material having a flow property such as a cosmetic solution, a chemical, and drinking water.
- the synthetic resin hollow body (A) is composed of a hollow molding body (inner bottle) (a) provided with an opening portion 14 that is an inlet or an outlet for a liquid material 22 and a resin sheathing body 16 formed in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body. That is, the resin sheathing body is over-molded around an external surface of the hollow molding body (a) in the present invention.
- a cap member 18 is attached to the opening portion 14 of the hollow molding body (a) to prevent the liquid material 22 from scattering externally out of the opening portion 14.
- the opening portion 14 and the cap member 18 are screwed to each other.
- the present invention is not restricted to such a configuration.
- the cap member 18 can also be fitted into the opening portion 14 in an inserting manner. After all, any configuration that can prevent the liquid material 22 from scattering externally out of the opening portion 14 of the hollow molding body (a) can also be adopted.
- the liquid material 22 that is held in the synthetic resin hollow body (A) can be, for instance, water, an aqueous solution, or a mixed solution of an oil component and an aqueous component such as a cosmetic solution, a chemical, and an organic solvent.
- the liquid material includes a pasty material.
- the resin sheathing body 16 is formed to cover the entire of the hollow molding body (a) from the bottom end of the opening portion 14.
- the resin sheathing body 16 is formed in a spherical shape to a shape of the hollow molding body (a) .
- the resin sheathing body 16 can also be decorated as shown in Fig. 3. After all, any shape can be adopted for the resin sheathing body 16.
- a character or a graphic can be printed on an external surface of the hollow molding body (a) before forming the resin sheathing body 16.
- the printed section of the hollow molding body (a) is protected by the resin sheathing body 16 at all times. Consequently, the printed section can be maintained to be clean as long as possible.
- a decorative convex and concave portion 20 can be formed on an external surface of the resin sheathing body 16.
- the synthetic resin hollow body (A) can have an increased design variation, an aesthetic appreciation, and a high quality sense.
- a synthetic resin hollow body (A) it is preferable to use a highly transparent synthetic resin as a material of the resin sheathing body 16. It is more preferable to use a synthetic resin having a total ray transmittance (conforming to JIS K7105, and measured with a sheet having a thickness of 1 mm) in the range of 80% to 100%, more preferably in the range of 85% to 100%.
- an ionomer resin As a material of a highly transparent synthetic resin that satisfies the above range of a transmittance, an ionomer resin, an acrylic resin, a polyester resin, and styrene resins (such as a styrene acrylonitrile copolymer resin and a styrene methylmethacrylate copolymer resin) can be used.
- an ionomer resin and a polyester resin and ionomer resin can be used. More preferably, an ionomer resin can be used.
- a carboxyl group of an ethylene unsaturated carboxylic acid copolymer containing unsaturated carboxylic acid of 1 to 40 weight% can be used for instance. At least part (generally more than 0 mol% and up to 100 mol%, preferably up to 90 mol%) of the carboxyl group is neutralized by metal ions.
- An ethylene unsaturated carboxylic acid copolymer that is a base polymer of an ionomer resin can be obtained by copolymerizing ethylene, and unsaturated carboxylic acid, and optionally any other polar monomers.
- unsaturated carboxylic acid acrylic acid, methacrylic acid, fumaric acid, maleic acid, anhydrous maleic acid, monomethyl maleate, and monoethyl maleate can be mentioned.
- methacrylic acid is preferable.
- a polar monomer that optionally can be a copolymer component
- vinyl ester such as vinyl acetate and vinyl propionate
- unsaturated carboxylic acid ester such as methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-hexyl acrylate, iso-octyl acrylate, methyl methacrylate, dimethyl maleate, and diethyl maleate, and carbon monoxide
- unsaturated carboxylic acid ester is a suitable copolymer component .
- the metal ion is a metal ion having a valence of monovalence, bivalence, or trivalence, in particular, a metal ion having a valence of monovalence, bivalence, or trivalence of the groups IA, HA, IHA, IVA, and VIII in the element periodic law.
- a thickness of the resin sheathing body 16 is at least 1 mm.
- any resin material can be used for the hollow molding body (a) and the cap member 18.
- a polyolefin resin such as polyethylene, polypropylene
- polyester such as PET (polyethylene terephthalate)
- PETG polyethylene terephthalate
- PEGT polycyclohexane dimethyl naphthalate
- PCTA polycyclohexane dimethyl naphthalate
- the hollow molding body (a) is set in a metal mold, and a molten resin is flown into the metal mold and on an external surface of the hollow molding body (a) to form the resin sheathing body 16. Consequently, it is preferable that the hollow molding body (a) is made of polyester or polyamide that has a comparatively high melting temperature in the case in which a highly transparent synthetic resin is used.
- liquid material 22 that is held in the hollow molding body (a) is a chemical
- polyethylene or polypropylene that has a comparatively excellent chemical resistance in highly transparent synthetic resins.
- the hollow molding body (a) for the cap member 18, it is preferable to use polyethylene or an ionomer resin that has a comparatively excellent chemical resistance in highly transparent synthetic resins since the cap member 18 may partially come into contact with the chemical .
- a highly transparent synthetic resin may be colored or may have no color.
- the hollow molding body (a) , the resin sheathing body 16, and the cap member 18 can have different colors from each other.
- the hollow molding body (a) is a hollow molding body formed by a method of welding two molding bodies using a vibration welding method, the two molding bodies having different colors can be welded to form the hollow molding body (a) .
- a light reflecting powder (not shown) is dispersed in the highly transparent synthetic resin, a light is reflected from the light reflecting powder and glitters, thereby further improving a high quality sense.
- a light reflecting powder it is preferable to use a light reflecting powder in which a metal or metal oxide is coated on a surface of mica that is a core of the light reflecting powder.
- a hollow molding body (a) is prepared at first.
- the hollow molding body (a) is previously manufactured by a blow molding method or by a method of forming two divided molding bodies in advance and welding the two bodies using a vibration welding method.
- the manufacturing method is not restricted in particular.
- the hollow molding body (a) can be a thin-walled molding body, and a thickness of the wall is preferably in the range of 0.1 to 10 mm, more preferably in the range of 0.2 to 8 mm.
- liquid 30 is then flown as a fluid substance into the hollow molding body (a) via an opening portion 14, and a cap member 18 is attached to the opening portion 14.
- the liquid 30 to be filled with should be at least 50% of the total amount that can be flown into the hollow molding body (a) , preferably at least 70%, in such a manner that the hollow molding body (a) is prevented from being deformed by a resin pressure in the case in which the hollow molding body (a) is set in metal molds 24 and 26 described later and a molten resin is flown into the metal molds .
- the liquid 30 is heated in the metal molds 24 and 26 to a certain degree. Consequently, it is preferable that such liquid 30 has normal physical properties even if heated.
- the liquid 30 that can be heated such as water is flown into the hollow molding body (a) and removed after a resin filling, and a desired liquid material 22 is then held in the hollow molding body (a) .
- a desired liquid material 22 can also be held in the hollow molding body (a) in advance in such a state.
- the desired liquid material 22 is heated in the metal molds 24 and 26 to a certain degree as described above. Consequently, only in the case in which abnormal physical properties do not occur for the liquid material 22, the desired liquid material 22 can be held in the hollow molding body (a) in advance.
- the liquid 30 to be used in molding is preferably water or alcohol in such a manner that it is not required to wash the hollow molding body (a) and that the hollow molding body (a) is only dried after the synthetic resin hollow body (A) is manufactured and the liquid 30 is removed from the hollow molding body (a) .
- the hollow molding body (a) is then set in the metal molds 24 and 26 in such manner that a container portion of the hollow molding body (a) floats in a space in the metal molds 24 and 26.
- a cap member 18 is attached to the opening portion 14 of the hollow molding body (a) before the hollow molding body (a) is set in the metal molds 24 and 26.
- a gate (not shown) can be formed in the metal molds 24 and 26 in such a manner that the liquid 30 does not flow out of the opening portion 14 of the hollow molding body (a) .
- a screw shape (not shown) can also be formed on the opening portion 14 of the hollow molding body (a) in advance and the opening portion 14 can be screwed into the metal molds 24 and 26.
- a highly transparent synthetic resin is filled in the metal molds 24 and 26 via a resin inflow port 28.
- the highly transparent synthetic resin that has been molten is over-molded on the periphery of the hollow molding body (a) from the bottom end of the opening portion 14 of the hollow molding body (a) in the metal molds 24 and 26.
- the metal molds 24 and 26 are opened after the highly transparent synthetic resin is hardened.
- the synthetic resin hollow body (A) is detached from the metal molds 24 and 26, and a runner and a sprue are detached.
- the liquid 30 is then removed from the hollow molding body (a) .
- the synthetic resin hollow body (A) in which a resin sheathing body 16 is formed in an integrating manner with the hollow molding body (a) can be obtained as shown in Fig. 1.
- the liquid 30 is removed from the hollow molding body (a) after the synthetic resin hollow body
- the resin sheathing body 16 is welded to an external surface of the hollow molding body (a) , thereby preventing the hollow molding body (a) from wobbling or rotating in the resin sheathing body 16. Moreover, the boundary line between the both members is hardly visible, thereby obtaining an improved aesthetic appreciation and an improved appearance property.
- a coating, a printing, or a hard coating can be carried out to the resin sheathing body 16 to impart a flaw resistance and a design property to the resin sheathing body 16.
- both the hollow molding body (a) and the resin sheathing body 16 are made of a resin. Consequently, the hollow molding body (a) and the resin sheathing body 16 are not required to be separated from each other in a disposal, thereby having a satisfactory recycle property.
- the core hollow molding body (a) is made of a resin
- the resin sheathing body 16 is made of a highly transparent synthetic resin. Consequently, a high quality sense, an aesthetic appreciation, and an appearance property can be extremely improved for the synthetic resin hollow body (A) .
- Fig. 8 illustrates another embodiment of a synthetic resin hollow body (A) in accordance with the present invention similarly to Figs. 1 to 7.
- the synthetic resin hollow body (A) shown in Fig. 8 has a configuration basically equivalent to that of the synthetic resin hollow body (A) of the embodiment shown in Figs. 1 to 7. Consequently, elements equivalent to those illustrated in Figs. 1 to 7 are numerically numbered similarly and the detailed descriptions of the equivalent elements are omitted. [0079]
- a point different from the above embodiment for the manufacturing method of the synthetic resin hollow body (A) shown in Fig. 8 is that a gas 32 is used as a fluid substance.
- a gas 32 is used as a fluid substance.
- a hollow molding body (a) in an empty state is set in the metal molds 24 and 26, and the gas 32 is made to blow in an opening portion 14 of the hollow molding body (a) .
- a pressure of the gas 32 that blows in the hollow molding body (a) is preferably in the range of 0.04 to 1.0 MPa.
- the gas 32 to be used is not restricted in particular. For instance, air, nitrogen, oxygen, an inert gas, and a carbon dioxide gas can be used. In particular, air is preferably used.
- a molten resin is flown into the metal molds 24 and 26 via a resin inflow port 28. By such a process, the molten resin covers the hollow molding body (a) .
- the molten resin is cooled and hardened by maintaining this state for a certain time..At this time, by reducing a pressure of the gas 32 that has blown in the hollow molding body (a) to make the pressure less than that at the resin filling, a resin sheathing body 16 can be formed in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body 16 without a distortion generated between the hollow molding body (a) and the resin sheathing body 16. At this time, a pressure of the gas 32 is preferably reduced to the range of 0.02 to 0.5 MPa. [0082]
- the metal molds 24 and 26 are then opened.
- a runner and a sprue are detached, and a cap member 18 is attached to the opening portion 14.
- the synthetic resin hollow body (A) in which the resin sheathing body 16 is formed in an integrating manner with the hollow molding body (a) can be obtained.
- the gas 32 is just made to blow in the hollow molding body (a) in the over-molding on the hollow molding body (a) . Consequently, a desired liquid material 22 can be held in the hollow molding body (a) immediately after the molding, thereby further reducing a manufacturing cost as compared with the above manufacturing method.
- the liquid 30 and the gas 32 are individually used as a fluid substance to be flown into the hollow molding body (a) .
- a combined use of the liquid 30 and the gas 32 is also possible.
- the liquid 30 is flown into the hollow molding body (a) by the range of 1% to 50%, preferably the range of 5% to 20%.
- the hollow molding body (a) is then set to the predetermined position in the metal molds 24 and 26 in such a manner that the opening portion 14 is located on the upper side without the cap member 18 attached to the opening portion 14 of the hollow molding body (a) .
- the gas 32 having a pressure in the range of 0.04 to 1.0 MPa is made to blow (that is, the gas 32 is made to blow at the pressure in the range of 0.04 to 1.0 Mpa) in the hollow molding body (a) via the opening portion 14, a molten resin is flown into the metal molds 24 and 26 and hardened.
- the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is covered by the resin sheathing body 16 in an integrating manner can be obtained.
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- Engineering & Computer Science (AREA)
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- Ceramic Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
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Abstract
[Problem] It is an object to provide a manufacturing method of a synthetic resin hollow body (A) capable of suppressing a resin cost and an operation cost and of greatly improving a decorating property. [Means for Resolution] A manufacturing method of a synthetic resin hollow body (A) in which a molten resin is injected for an over-molding outside a hollow molding body (a) made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body (a) comprises the step of injecting the molten resin for an over-molding under the state in which the hollow molding body (a) is partially or wholly filled with a fluid substance.
Description
DESCRIPTION
MANUFACTURING METHOD OF SYNTHETIC RESIN HOLLOW BODY
• TECHNICAL FIELD
[0001]
The present invention relates to a manufacturing method of a synthetic resin hollow body (A) for holding a liquid material having a flow property such as a cosmetic solution, a chemical, and drinking water.
BACKGROUND ART [0002]
As a container for holding a liquid material such as a cosmetic solution, a chemical, and drinking water, a container with a cap having an excellent corrosion resistance and a satisfactory airtight property has been widely used. The container is generally made of a glass. In some cases, a metal container can also be used to obtain similar effects. [0003]
The glass container has a dignity sense and a high quality sense, thereby being suitably used for a container of a cosmetic solution in particular. However, in some cases, the glass container may be easily damaged by a shock during a
carrying operation or by a drop in use. [0004]
On the other hand, the metal container has an excellent shock resistance in particular. However, a weight and a raw material cost thereof are increased, and a processing thereof has a lot of trouble.
In many cases, the glass container and metal container are in a simple shape, thereby being lacking in a decorating property. [0005]
As shown in Fig. 10, Patent document 1 proposes a composite container 104 in which a resin is over-molded on a container 100 made of a glass or a metal to form a resin sheathing body 102 outside the container 100 in order to add a design property. [0006]
On the other hand, in the case in which the container is made of a synthetic resin, the container is manufactured by a method such as a blow molding method and a method of forming two divided molding bodies in advance and of welding the two bodies using a vibration welding method, thereby reducing a manufacturing cost and enabling a mass production. [0007]
However, the blow- molding method just enables a
formation of only a thin-walled container. Consequently, a shape of the container is restricted to a certain degree, thereby being lacking in a decorating property in some cases.
Moreover, the method of welding the two divided molding bodies using a vibration welding method enables a manufacture of a container in a free shape as compared with the blow molding method. However, in the case in which a liquid material to be held in the container is a chemical or the like, a material of the container is restricted to a costly resin having an excellent chemical resistance, thereby increasing a resin cost disadvantageously. [0008]
As a method to solve the above problems, Patent document 2 discloses a synthetic resin hollow body 206 as shown in Fig. 11. To form the synthetic resin hollow body 206, an inner shell 200 is formed at first by combining divided molding bodies or by a blow molding method. A molten resin made of a material equivalent to or other than that of the inner shell 200 is then injected outside the inner shell to form an over-molded portion 202, thereby integrating the over-molded portion 202 with the inner shell 200. [0009]
Such a synthetic resin hollow body 206 has a two-layer structure, thereby further improving a decorating property.
Moreover, a resin having an excellent chemical resistance can be used for only the inner shell 200, and a comparatively low cost resin can be used outside the inner shell, thereby reducing a total resin cost for the synthetic resin hollow body 206.
Patent document 1: Japanese Unexamined Patent Application Publication No. 2004-527424
Patent document 2: Japanese Patent Application Laid-Open Publication No. 06-23758
DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION [0010] However, for such a composite container 104 disclosed in Patent document 1, a material of the core container 100 is a glass or a metal, thereby restricting processability to a certain degree. Consequently, a degree of freedom for a design is insufficient and not satisfactory. [0011]
The glass container 100 in such a composite container 104 is covered by the resin sheathing body 102. However, since the core container 100 is made of a glass, a damage caused by a drop cannot be prevented in many cases.
[ 0012 ]
The composite container 104 is made of a combination of different materials composed of a glass and a resin.
Consequently, the glass and the resin must be separated in a disposal, thereby involving a disadvantage in relation to a recycle property.
For the synthetic resin hollow body 206 disclosed in
Patent document 2, a thickening material such as a super absorbent resin is injected into the inner shell 200 in advance, and is frozen and hardened to be a core material 204 before set in a metal mold 208, in such a manner that the inner shell 200 is prevented from being deformed or damaged by a resin pressure of a molten resin in the case in which a molten resin is injected outside the inner shell 200 in an integrating manner. After an integrating molding with the inner shell 200, the core material 204 in the inner shell 200 must be molten and removed. Consequently, there are many complicated operation processes.
[0013] Before the synthetic resin hollow body 206 is used, a thickening material that has adhered inside the inner shell 200 must be cleaned, thereby deteriorating productivity.
Moreover, although this method can suppress a resin cost, an operation cost is increased disadvantageously.
[ 0014 ]
The present invention was made in consideration of such conditions, and an object of the present invention is to provide a manufacturing method of a synthetic resin hollow body capable of suppressing a product cost and an operation cost.
MEANS FOR SOLVING THE PROBLEMS [0015] The present invention was made in order to solve the above problems of the conventional art. A manufacturing method of a synthetic resin hollow body (A) in which a molten resin is injected for an over-molding outside a hollow molding body (a) made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body
(a) in accordance with the present invention is characterized by comprising the step of injecting the molten resin for an over-molding under the state in which the hollow molding body (a) is partially or wholly filled with a fluid substance.
[0016]
By such a configuration, the hollow molding body (a) can be prevented from being deformed by a resin pressure in molding, thereby manufacturing the synthetic resin hollow
body (A) in which an external surface of the hollow molding body (a) is reliably covered by the resin sheathing body in an integrating manner. [0017] The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the resin sheathing body is preferably welded to an external surface of the hollow molding body (a) .
As described above, the resin sheathing body is welded to an external surface of the hollow molding body (a) , thereby preventing the hollow molding body (a) from wobbling or rotating inside the resin sheathing body.
Moreover, the boundary line between the both members is hardly visible, thereby obtaining the synthetic resin hollow body (A) having an improved aesthetic appreciation. [0018]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized by comprising the steps of filling partially or wholly the hollow molding body (a) with a liquid as a fluid substance; attaching a cap member to the opening portion; setting the hollow molding body (a) holding the liquid inside to a metal mold; and injecting a molten resin for an over-molding, wherein the liquid is one of water, an aqueous solution, a
cosmetic solution, a chemical, and an organic solvent. [0019]
By attaching the cap member to the opening portion as described above, a fluid substance (a liquid in particular) can be prevented from scattering externally out of the opening portion, and the hollow molding body (a) can be safely set to a metal mold even in the case in which the fluid substance such as a chemical accompanied by a danger in a handling is used. [0020]
As described above, since the fluid substance is a liquid, the hollow molding body (a) can be prevented from being deformed by a resin pressure in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is reliably covered by the resin sheathing body in an integrating manner. [0021]
Moreover, in the case in which the fluid substance is water, after the synthetic resin hollow body (A) is manufactured, only removing water and drying enable a desired cosmetic solution or the like to be newly held, thereby facilitating the manufacturing.
Furthermore, in the case in which the hollow molding body (a) is filled with a cosmetic solution or the like to be
held in advance in molding, the synthetic resin hollow body (A) can be a product for a market immediately after the manufacturing, thereby further facilitating the manufacturing process. [0022]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a boiling point of the liquid is preferably at least 500C. By setting a boiling point of the liquid as described above, the liquid can be prevented from being vaporized in a metal mold in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is safely and reliably covered by the resin sheathing body in an integrating manner. [0023]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the fluid substance is a gas preferably. As described above, since the fluid substance to be filled in the hollow molding body (a) is a gas, the synthetic resin hollow body (A) can be a product for a market immediately after the over-molding, thereby further improving productivity as compared with the case in which the fluid
substance is a liquid. [0024]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the gas is preferably one of air, nitrogen, oxygen, an inert gas, and a carbon dioxide gas.
In the case in which the gas is one of the above gases, the hollow molding body (a) can be reliably prevented from being deformed by an injection pressure in an injection. [0025]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the gas is blown into the hollow molding body (a) in an injection of the molten resin, and a gas pressure in the hollow molding body (a) in a period of a cooling of the molten resin is preferably held to be lower than the blowing pressure of the gas blown in the injection of the molten resin in the case in which the molten resin is injected into the metal mold. [0026]
By adjusting a gas pressure in the hollow molding body (a) in an injection of the molten resin and in a cooling of the molten resin as described above, the hollow molding body (a) can be prevented from being deformed by an injection
pressure in an injection, and a distortion can be reliably prevented from being generated between the hollow molding body (a) and the resin sheathing body in a cooling. [0027] The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a pressure of the gas to be blown into the hollow molding body (a) is preferably in the range of 0.04 to 1.0 MPa in a period from the start to the end of the injection of the molten resin.
By adjusting a gas pressure in the range as described above, the hollow molding body (a) can be effectively prevented from being deformed by a resin pressure. [0028] The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a pressure of the gas in the hollow molding body (a) is preferably in the range of 0.02 to 0.5 MPa in a period of the cooling of the molten resin. By adjusting a gas pressure in the range as described above, a distortion can be reliably prevented from being generated between the hollow molding body (a) and the resin sheathing body in cooling the resin. [0029]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a molding temperature is in the range of 1000C to 3000C and an injection pressure is in the range of 20 to 150 kg/cm3 preferably in the case in which the molten resin is injected into the metal mold. [0030]
By setting the conditions for the metal mold in the range as described above, the fluid substance can be prevented from being vaporized in a metal mold in molding, thereby manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is safely and reliably covered by the resin sheathing body in an integrating manner. [0031]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the molten resin to be injected into the metal mold is preferably an ionomer resin. By using such a resin for a molding as described above, the hollow molding body (a) is clearly visible via the • resin sheathing body. In addition, the resin sheathing body has an extremely high transparency, thereby greatly improving a high quality sense, an aesthetic appreciation, and an appearance
property. [0032]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is preferably formed by a blow molding method or a method of welding two divided molding bodies using a vibration welding method. [0033] By forming the hollow molding body (a) by such a method as described above, a mass production is possible and a manufacturing cost can be reduced, thereby also manufacturing the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is covered by the resin sheathing body in an integrating manner at a low cost. [0034]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is a thin- walled molding body preferably.
As described above, since the hollow molding body (a) is a thin-walled molding body, in the case in which the hollow molding body (a) is integrated with the resin sheathing body, the boundary line between the both members is
hardly visible, thereby obtaining the synthetic resin hollow body (A) having an improved aesthetic appreciation.
Moreover, in the case in which a thin-walled molding body is formed by a blow molding method, productivity can be improved, and an amount of a resin to be used can be suppressed. [0035]
The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that a thickness of the resin sheathing body is at least 1 mm preferably. [0036]
As described above, since a thickness of the resin sheathing body is at least 1 mm, a dignity sense of a glass can be obtained, and the resin sheathing body can be formed in many kinds of shapes, thereby obtaining the synthetic resin hollow body (A) having an improved aesthetic appreciation. [0037] The manufacturing method of a synthetic resin hollow body (A) in accordance with the present invention is characterized in that the hollow molding body (a) is a hollow molding container preferably.
As described above, since the hollow molding body (a)
is a hollow molding container, a liquid material such as a cosmetic solution, a chemical, and drinking water does not leak and can be held reliably.
EFFECT OF THE INVENTION
[0038]
The present invention can provide a manufacturing method of a synthetic resin hollow body (A) capable of suppressing a product cost and an operation cost by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin. [0039]
Moreover, an injection is carried out under the state in which a hollow molding body (a) is partially or wholly filled with a fluid substance. Consequently, even in the case in which the hollow molding body (a) is made of a resin, the hollow molding body (a) can be prevented from being deformed by an injection pressure, thereby obtaining the synthetic resin hollow body (A) in which the hollow molding body (a) is reliably covered by the resin sheathing body. [0040]
The present invention can also provide a manufacturing method of a synthetic resin hollow body (A) that has a satisfactory decorating property by making a core hollow
molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin. [0041]
Moreover, the present invention can provide a manufacturing method of a synthetic resin hollow body (A) that is hardly damaged even in the case in which the synthetic resin hollow body is dropped, by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin. [0042]
Furthermore, the present invention can provide a manufacturing method of a synthetic resin hollow body (A) that is not required to be separated in a disposal, thereby having a satisfactory recycle property, by making a core hollow molding body (a) of a resin and by making a resin sheathing body of a highly transparent synthetic resin. [0043]
In the case in which a core hollow molding body (a) is made of a thin glass and has a thin-walled flat bottom, a crack may easily occur during an over-molding of a resin sheathing body. However, the present invention adopts a hollow molding body (a) made of a resin, thereby facilitating an over-molding.
BRIEF DESCRIPTION OF THE DRAWINGS [0044]
Fig. 1 is a perspective view showing a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
Fig. 2 is a cross-sectional view showing a synthetic resin hollow body (A) in accordance with an embodiment of the present invention.
Fig. 3 is a perspective view showing a synthetic resin hollow body (A) in accordance with another embodiment of the present invention.
Fig. 4 is a perspective view showing a synthetic resin hollow body (A) in accordance with another embodiment of the present invention. Fig. 5 shows a hollow molding body (a) in accordance with another embodiment of the present invention. Fig. 5 (a) shows a hollow molding body (a) with a cap opened, and Fig. 5(b) shows the hollow molding body of Fig. 5 (a) that holds a liquid as a fluid substance and that is closed by a cap member.
Fig. 6 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with an embodiment of the present invention. Fig. 6 (a) shows a state in which a hollow molding body (a) is set in a metal mold,
Fig. 6 (b) shows a state in which the metal mold is closed, and Fig. 6(c) shows a state in which a resin sheathing body is filled with in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body.
Fig. 7 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with an embodiment of the present invention. Fig. 7 (a) shows a state in which the metal mold is opened, and Fig. 7 (b) shows a state in which the synthetic resin hollow body (A) is detached from the metal mold.
Fig. 8 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with another embodiment of the present invention. Fig. 8 (a) shows a state in which a hollow molding body (a) is set in a metal mold, Fig. 8 (b) shows a state in which the metal mold is closed, and Fig. 8 (c) shows a state in which a resin sheathing body- is filled with in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body.
Fig. 9 illustrates a manufacturing method of a synthetic resin hollow body (A) in accordance with another embodiment of the present invention. Fig. 9 (a) shows a state in which the metal mold is opened, and Fig. 9 (b) shows a
state in which the synthetic resin hollow body (A) is detached from the metal mold.
Fig. 10 is a perspective view showing a conventional composite container. Fig. 11 is a process drawing illustrating a conventional manufacturing method of a synthetic resin hollow body (A) .
EXPLANATIONS OF LETTERS OR NUMERALS [0045]
A: synthetic resin hollow body a: hollow molding body
14: opening portion
16: resin sheathing body 18: cap member
20: convex and concave portion
22: liquid material
24: metal mold
26: metal mold 28: resin inflow port
30: liquid
32: gas
100: container
102: resin sheathing body
104: composite container 200: inner shell 202: over-molded portion 204: core material 206: synthetic resin hollow body 208: metal mold
BEST MODE OF CARRYING OUT THE INVENTION
[0046] An embodiment (example) of the present invention will be described below in detail with reference to the drawings.
Fig. 1 is a view showing a synthetic resin hollow body
(A) in accordance with an embodiment of the present invention.
Fig. 2 is a cross-sectional view showing the synthetic resin hollow body (A) of Fig. 1. Figs. 3 and 4 are views showing other embodiments of a synthetic resin hollow body (A). Figs.
5 to 7 illustrate an embodiment of a method for manufacturing a synthetic resin hollow body (A) .
<Synthetic resin hollow body (A) > A synthetic resin hollow body (A) in accordance with the present invention is for holding a liquid material having a flow property such as a cosmetic solution, a chemical, and drinking water.
[0047]
As shown in Fig. 1, the synthetic resin hollow body (A) is composed of a hollow molding body (inner bottle) (a) provided with an opening portion 14 that is an inlet or an outlet for a liquid material 22 and a resin sheathing body 16 formed in such a manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body. That is, the resin sheathing body is over-molded around an external surface of the hollow molding body (a) in the present invention. [0048]
A cap member 18 is attached to the opening portion 14 of the hollow molding body (a) to prevent the liquid material 22 from scattering externally out of the opening portion 14. In this embodiment, the opening portion 14 and the cap member 18 are screwed to each other. However, the present invention is not restricted to such a configuration. For instance, the cap member 18 can also be fitted into the opening portion 14 in an inserting manner. After all, any configuration that can prevent the liquid material 22 from scattering externally out of the opening portion 14 of the hollow molding body (a) can also be adopted. [0049]
Moreover, the liquid material 22 that is held in the synthetic resin hollow body (A) can be, for instance, water,
an aqueous solution, or a mixed solution of an oil component and an aqueous component such as a cosmetic solution, a chemical, and an organic solvent. In the present invention, the liquid material includes a pasty material. [0050]
As shown in Fig. 2, for such a synthetic resin hollow body (A) , the resin sheathing body 16 is formed to cover the entire of the hollow molding body (a) from the bottom end of the opening portion 14. In this embodiment, the resin sheathing body 16 is formed in a spherical shape to a shape of the hollow molding body (a) . In addition, the resin sheathing body 16 can also be decorated as shown in Fig. 3. After all, any shape can be adopted for the resin sheathing body 16. [0051]
A character or a graphic can be printed on an external surface of the hollow molding body (a) before forming the resin sheathing body 16. In this case, the printed section of the hollow molding body (a) is protected by the resin sheathing body 16 at all times. Consequently, the printed section can be maintained to be clean as long as possible. [0052]
As shown in Fig. 4, a decorative convex and concave portion 20 can be formed on an external surface of the resin
sheathing body 16. By such a configuration, the synthetic resin hollow body (A) can have an increased design variation, an aesthetic appreciation, and a high quality sense. [0053] For such a synthetic resin hollow body (A) , it is preferable to use a highly transparent synthetic resin as a material of the resin sheathing body 16. It is more preferable to use a synthetic resin having a total ray transmittance (conforming to JIS K7105, and measured with a sheet having a thickness of 1 mm) in the range of 80% to 100%, more preferably in the range of 85% to 100%. [0054]
As a material of a highly transparent synthetic resin that satisfies the above range of a transmittance, an ionomer resin, an acrylic resin, a polyester resin, and styrene resins (such as a styrene acrylonitrile copolymer resin and a styrene methylmethacrylate copolymer resin) can be used. Preferably, an ionomer resin and a polyester resin and ionomer resin can be used. More preferably, an ionomer resin can be used. [0055]
As an ionomer resin, a carboxyl group of an ethylene unsaturated carboxylic acid copolymer containing unsaturated carboxylic acid of 1 to 40 weight% can be used for instance.
At least part (generally more than 0 mol% and up to 100 mol%, preferably up to 90 mol%) of the carboxyl group is neutralized by metal ions. [0056] An ethylene unsaturated carboxylic acid copolymer that is a base polymer of an ionomer resin can be obtained by copolymerizing ethylene, and unsaturated carboxylic acid, and optionally any other polar monomers. As unsaturated carboxylic acid, acrylic acid, methacrylic acid, fumaric acid, maleic acid, anhydrous maleic acid, monomethyl maleate, and monoethyl maleate can be mentioned. In particular, methacrylic acid is preferable. [0057]
As a polar monomer that optionally can be a copolymer component, vinyl ester such as vinyl acetate and vinyl propionate, unsaturated carboxylic acid ester such as methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-hexyl acrylate, iso-octyl acrylate, methyl methacrylate, dimethyl maleate, and diethyl maleate, and carbon monoxide can be mentioned. In particular, unsaturated carboxylic acid ester is a suitable copolymer component . [0058]
The metal ion is a metal ion having a valence of
monovalence, bivalence, or trivalence, in particular, a metal ion having a valence of monovalence, bivalence, or trivalence of the groups IA, HA, IHA, IVA, and VIII in the element periodic law. More specifically, there can be mentioned Na+, K+, Li+, Cs+, Ag+, Hg+, Cu+, Be++, Mg++, Ca++, Sr++, Ba++, Cu++, Cd++, Hg++, Sn++, Pb++, Fe++, Co++, Ni++, Zn++, Al+++, Sc+++, Fe+++, and Y+++. [0059]
The above materials are excellent in a transparency, a shock resistance, and a mar-proof property. In addition, a thick-walled molding is possible and a dignity sense of a glass can be obtained. Consequently, these materials are suitable for a material of the resin sheathing body 16. In the present invention, it is preferable that a thickness of the resin sheathing body 16 is at least 1 mm. [0060]
Any resin material can be used for the hollow molding body (a) and the cap member 18. For instance, a polyolefin resin, polyolefin resin (such as polyethylene, polypropylene) , polyester (such as PET (polyethylene terephthalate) , PETG,
PEGT, PCT (polycyclohexane dimethyl naphthalate) , PCTA, PEN
(polyethylene naphthalate) ) , acrylic resin, styrene resin
(such as a styrene acrylonitrile copolymer resin, styrene methyl methacrylate copolymer resin) , cycloolefin polymer,
polycarbonate, polyamide, ionomer resin, and PAN (polyacrylonitride) can be used. In the case in which a material the same as that of the resin sheathing body 16 is used, a synergistic effect with the resin sheathing body 16 can be obtained, thereby improving a high quality sense, an appearance property, and an aesthetic appreciation. [0061]
As described later, the hollow molding body (a) is set in a metal mold, and a molten resin is flown into the metal mold and on an external surface of the hollow molding body (a) to form the resin sheathing body 16. Consequently, it is preferable that the hollow molding body (a) is made of polyester or polyamide that has a comparatively high melting temperature in the case in which a highly transparent synthetic resin is used. [0062]
In the case in which the liquid material 22 that is held in the hollow molding body (a) is a chemical, it is preferable to use polyethylene or polypropylene that has a comparatively excellent chemical resistance in highly transparent synthetic resins.
Similarly to the above hollow molding body (a) , for the cap member 18, it is preferable to use polyethylene or an ionomer resin that has a comparatively excellent chemical
resistance in highly transparent synthetic resins since the cap member 18 may partially come into contact with the chemical . [0063] Such a highly transparent synthetic resin may be colored or may have no color. Moreover, the hollow molding body (a) , the resin sheathing body 16, and the cap member 18 can have different colors from each other. As a matter of course, in the case in which the hollow molding body (a) is a hollow molding body formed by a method of welding two molding bodies using a vibration welding method, the two molding bodies having different colors can be welded to form the hollow molding body (a) . [0064] In the case in which a blue highly transparent synthetic resin in which Heliogen Blue K6911D (manufactured by BASF Company) is contained in ionomer is used for molding, the material can be colored to be blue. [0065] Even in the case in which a character or a graphic is generated on a surface of the hollow molding body (a) , the character or the graphic that has been generated on the hollow molding body (a) is visible reliably from the outside of the resin sheathing body 16 by using such a highly
transparent synthetic resin. Consequently, a high quality sense, an aesthetic appreciation, and an appearance property can be improved for the synthetic resin hollow body (A) . [0066] Moreover, in the case in which a light reflecting powder (not shown) is dispersed in the highly transparent synthetic resin, a light is reflected from the light reflecting powder and glitters, thereby further improving a high quality sense. As such a light reflecting powder, it is preferable to use a light reflecting powder in which a metal or metal oxide is coated on a surface of mica that is a core of the light reflecting powder. <Manufacturing method of the synthetic resin hollow body (A) > Subsequently, the manufacturing method of the synthetic resin hollow body (A) in accordance with the present invention will be described below. [0067]
As shown in Fig. 5 (a) , a hollow molding body (a) is prepared at first. The hollow molding body (a) is previously manufactured by a blow molding method or by a method of forming two divided molding bodies in advance and welding the two bodies using a vibration welding method. The manufacturing method is not restricted in particular. In the
case in which a blow molding is carried out, the hollow molding body (a) can be a thin-walled molding body, and a thickness of the wall is preferably in the range of 0.1 to 10 mm, more preferably in the range of 0.2 to 8 mm. [0068]
As shown in Fig. 5 (b) , liquid 30 is then flown as a fluid substance into the hollow molding body (a) via an opening portion 14, and a cap member 18 is attached to the opening portion 14. The liquid 30 to be filled with should be at least 50% of the total amount that can be flown into the hollow molding body (a) , preferably at least 70%, in such a manner that the hollow molding body (a) is prevented from being deformed by a resin pressure in the case in which the hollow molding body (a) is set in metal molds 24 and 26 described later and a molten resin is flown into the metal molds . [0069]
The liquid 30 is heated in the metal molds 24 and 26 to a certain degree. Consequently, it is preferable that such liquid 30 has normal physical properties even if heated.
In the case in which abnormal physical properties may- occur by heating, the liquid 30 that can be heated such as water is flown into the hollow molding body (a) and removed after a resin filling, and a desired liquid material 22 is
then held in the hollow molding body (a) . [0070]
As a matter of course, a desired liquid material 22 can also be held in the hollow molding body (a) in advance in such a state. However, the desired liquid material 22 is heated in the metal molds 24 and 26 to a certain degree as described above. Consequently, only in the case in which abnormal physical properties do not occur for the liquid material 22, the desired liquid material 22 can be held in the hollow molding body (a) in advance. [0071]
The liquid 30 to be used in molding is preferably water or alcohol in such a manner that it is not required to wash the hollow molding body (a) and that the hollow molding body (a) is only dried after the synthetic resin hollow body (A) is manufactured and the liquid 30 is removed from the hollow molding body (a) . [0072]
As shown in Fig. 6 (a), the hollow molding body (a) is then set in the metal molds 24 and 26 in such manner that a container portion of the hollow molding body (a) floats in a space in the metal molds 24 and 26.
In this embodiment, a cap member 18 is attached to the opening portion 14 of the hollow molding body (a) before the
hollow molding body (a) is set in the metal molds 24 and 26. However, a gate (not shown) can be formed in the metal molds 24 and 26 in such a manner that the liquid 30 does not flow out of the opening portion 14 of the hollow molding body (a) . In addition, a screw shape (not shown) can also be formed on the opening portion 14 of the hollow molding body (a) in advance and the opening portion 14 can be screwed into the metal molds 24 and 26. By such configurations, the hollow molding body (a) can be set in the metal molds 24 and 26 without attaching the cap member 18 to the hollow molding body (a) . [0073]
As shown in Fig. 6(b), the metal molds 24 and 26 are then closed. As shown in Fig. 6(c), a highly transparent synthetic resin is filled in the metal molds 24 and 26 via a resin inflow port 28.
By such a process, the highly transparent synthetic resin that has been molten is over-molded on the periphery of the hollow molding body (a) from the bottom end of the opening portion 14 of the hollow molding body (a) in the metal molds 24 and 26. [0074]
As shown in Fig. 7 (a) , the metal molds 24 and 26 are opened after the highly transparent synthetic resin is
hardened. As shown in Fig. 7 (b) , the synthetic resin hollow body (A) is detached from the metal molds 24 and 26, and a runner and a sprue are detached. The liquid 30 is then removed from the hollow molding body (a) . As a result, the synthetic resin hollow body (A) in which a resin sheathing body 16 is formed in an integrating manner with the hollow molding body (a) can be obtained as shown in Fig. 1. In the case in which the hollow molding body (a) is not provided with the cap member 18, the liquid 30 is removed from the hollow molding body (a) after the synthetic resin hollow body
(A) is detached from the metal molds 24 and 26, and the cap member 18 is attached to the opening portion 14 of the hollow molding body (a) . By such a process, the synthetic resin hollow body (A) in which the resin sheathing body 16 is formed in an integrating manner with the hollow molding body
(a) can be obtained similarly to the above. In this case, the resin sheathing body 16 is welded to an external surface of the hollow molding body (a) , thereby preventing the hollow molding body (a) from wobbling or rotating in the resin sheathing body 16. Moreover, the boundary line between the both members is hardly visible, thereby obtaining an improved aesthetic appreciation and an improved appearance property. [0075]
In the present invention, a coating, a printing, or a
hard coating can be carried out to the resin sheathing body 16 to impart a flaw resistance and a design property to the resin sheathing body 16.
By such a method, after the resin sheathing body 16 is filled with, the liquid 30 is removed from the hollow molding body (a) , and a desired liquid material 22 is flown into the hollow molding body (a) . Consequently, the synthetic resin hollow body (A) that holds the liquid material 22 can be manufactured. Therefore, it is unnecessary to adopt the conventional complicated processes such as defrosting the frozen liquid 30, removing the content, and filling with the liquid material 22. Accordingly, a manufacturing cost can be reduced. [0076] Moreover, both the hollow molding body (a) and the resin sheathing body 16 are made of a resin. Consequently, the hollow molding body (a) and the resin sheathing body 16 are not required to be separated from each other in a disposal, thereby having a satisfactory recycle property. Furthermore, after the synthetic resin hollow body (A) is manufactured, in the case in which the liquid 30 that has been held in the hollow molding body (a) in molding is removed and a desired liquid material 22 is newly held in the hollow molding body (a) , water can be used as the liquid 30
that is held in the hollow molding body (a) in molding. Consequently, the inside wall of the hollow molding body (a) is only dried after removing water, thereby preventing the manufacturing process from being complicated and reducing a manufacturing cost of the synthetic resin hollow body (A) . [0077]
Furthermore, the core hollow molding body (a) is made of a resin, and the resin sheathing body 16 is made of a highly transparent synthetic resin. Consequently, a high quality sense, an aesthetic appreciation, and an appearance property can be extremely improved for the synthetic resin hollow body (A) . [0078]
Fig. 8 illustrates another embodiment of a synthetic resin hollow body (A) in accordance with the present invention similarly to Figs. 1 to 7.
The synthetic resin hollow body (A) shown in Fig. 8 has a configuration basically equivalent to that of the synthetic resin hollow body (A) of the embodiment shown in Figs. 1 to 7. Consequently, elements equivalent to those illustrated in Figs. 1 to 7 are numerically numbered similarly and the detailed descriptions of the equivalent elements are omitted. [0079]
A point different from the above embodiment for the
manufacturing method of the synthetic resin hollow body (A) shown in Fig. 8 is that a gas 32 is used as a fluid substance. In this case, as shown in Fig. 8 (a) , a hollow molding body (a) in an empty state is set in the metal molds 24 and 26, and the gas 32 is made to blow in an opening portion 14 of the hollow molding body (a) . At this time, a pressure of the gas 32 that blows in the hollow molding body (a) is preferably in the range of 0.04 to 1.0 MPa. The gas 32 to be used is not restricted in particular. For instance, air, nitrogen, oxygen, an inert gas, and a carbon dioxide gas can be used. In particular, air is preferably used. [0080]
As shown in Fig. 8 (b) , the metal molds 24 and 26 are then closed while the gas 32 is made to blow in the hollow molding body (a) . As shown in Fig. 8 (c) , a molten resin is flown into the metal molds 24 and 26 via a resin inflow port 28. By such a process, the molten resin covers the hollow molding body (a) . [0081] The molten resin is cooled and hardened by maintaining this state for a certain time..At this time, by reducing a pressure of the gas 32 that has blown in the hollow molding body (a) to make the pressure less than that at the resin filling, a resin sheathing body 16 can be formed in such a
manner that an external surface of the hollow molding body (a) is covered in an integrating manner with the resin sheathing body 16 without a distortion generated between the hollow molding body (a) and the resin sheathing body 16. At this time, a pressure of the gas 32 is preferably reduced to the range of 0.02 to 0.5 MPa. [0082]
As shown in Fig. 9 (a), the metal molds 24 and 26 are then opened. As shown in Fig. 9 (b) , a runner and a sprue are detached, and a cap member 18 is attached to the opening portion 14. As a result, the synthetic resin hollow body (A) in which the resin sheathing body 16 is formed in an integrating manner with the hollow molding body (a) can be obtained. [0083]
In the manufacturing method in accordance with this embodiment, the gas 32 is just made to blow in the hollow molding body (a) in the over-molding on the hollow molding body (a) . Consequently, a desired liquid material 22 can be held in the hollow molding body (a) immediately after the molding, thereby further reducing a manufacturing cost as compared with the above manufacturing method. [0084]
In the above manufacturing methods of the synthetic
resin hollow body (A) , the liquid 30 and the gas 32 are individually used as a fluid substance to be flown into the hollow molding body (a) . However, a combined use of the liquid 30 and the gas 32 is also possible. [0085]
In this case, the liquid 30 is flown into the hollow molding body (a) by the range of 1% to 50%, preferably the range of 5% to 20%. The hollow molding body (a) is then set to the predetermined position in the metal molds 24 and 26 in such a manner that the opening portion 14 is located on the upper side without the cap member 18 attached to the opening portion 14 of the hollow molding body (a) . [0086]
While the gas 32 having a pressure in the range of 0.04 to 1.0 MPa is made to blow (that is, the gas 32 is made to blow at the pressure in the range of 0.04 to 1.0 Mpa) in the hollow molding body (a) via the opening portion 14, a molten resin is flown into the metal molds 24 and 26 and hardened. As a result, the synthetic resin hollow body (A) in which an external surface of the hollow molding body (a) is covered by the resin sheathing body 16 in an integrating manner can be obtained. [0087]
In the case in which a combined use of the liquid 30
and the gas 32 is carried out for a fluid substance to be flown into the hollow molding body (a) as described above, it is not necessary to modify a blowing pressure of the gas 32 in the flowing of the molten resin and in the hardening of the molten resin. Moreover, a heat resistance and a pressure resistance of the hollow molding body (a) in molding can be improved as compared with the case of using only the gas 32. Furthermore, as compared with the case of using only the liquid 30, an amount of the liquid 30 to be filled in the hollow molding body (a) can be reduced, thereby facilitating an exhaust of the liquid 30 from the hollow molding body (a) after molding. [0088]
While the preferred embodiments of the present invention have been described above, the present invention is not restricted to the embodiments, and various changes and modifications can be thus made without departing from the scope of the present invention. For instance, a liquid and a gas are used as a fluid substance in this specification. However, the present invention is not restricted to this case, and powder or the like can also be used.
Claims
1. A manufacturing method of a synthetic resin hollow body (A) in which a molten resin is injected for an over-molding outside a hollow molding body (a) made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body (a) , comprising the step of: injecting the molten resin for an over-molding under the state in which the hollow molding body (a) is partially or wholly filled with a fluid substance.
2. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 1, wherein the resin sheathing body is welded to an external surface of the hollow molding body (a) .
3. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 1 or 2, comprising the steps of: filling partially or wholly the hollow molding body (a) with a liquid as a fluid substance; attaching a cap member to the opening portion; setting the hollow molding body (a) holding the liquid inside to a metal mold; and injecting a molten resin for an over-molding, wherein the liquid is one of water, an aqueous solution, a cosmetic solution, a chemical, and an organic solvent.
4. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 3, wherein a boiling point of the liquid is at least 500C.
5. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 1 or 2, wherein the fluid substance is a gas.
6. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 5, wherein the gas is one of air, nitrogen, oxygen, an inert gas, and a carbon dioxide gas .
7. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 5 or 6, wherein the gas is blown into the hollow molding body (a) in an injection of the molten resin, and a gas pressure in the hollow molding body (a) in a period of a cooling of the molten resin is held to be lower than the blowing pressure of the gas blown in the injection of the molten resin, in the case in which the molten resin is injected into the metal mold.
8. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 7, wherein a pressure of the gas to be blown into the hollow molding body (a) is in the range of 0.04 to 1.0 MPa in a period from the start to the end of the injection of the molten resin.
9. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 7 or 8, wherein a pressure of the gas in the hollow molding body (a) is in the range of 0.02 to 0.5 MPa in a period of the cooling of the molten resin.
10. The manufacturing method of a synthetic resin hollow body (A) as defined in any one of claims 1 to 9, wherein a molding temperature is in the range of 1000C to 3000C and an injection pressure is in the range of 20 to 150 kg/cm3 in the case in which the molten resin is injected into the metal mold.
11. The manufacturing method of a synthetic resin hollow body (A) as defined in any one of claims 1 to 10, wherein the molten resin to be injected into the metal mold is an ionomer resin.
12. The manufacturing method of a synthetic resin hollow body (A) as defined in any one of claims 1 to 11, wherein the hollow molding body (a) is formed by a blow molding method or a method of welding two divided molding bodies using a vibration welding method.
13. The manufacturing method of a synthetic resin hollow body (A) as defined in claim 12, wherein the hollow molding body (a) is a thin-walled molding body.
14. The manufacturing method of a synthetic resin hollow body (A) as defined in any one of claims 1 to 13, wherein a thickness of the resin sheathing body is at least 1 mm.
15. The manufacturing method of a synthetic resin hollow body (A) as defined in any one of claims 1 to 14, wherein the hollow molding body (a) is a hollow molding container.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0714396-6A BRPI0714396A2 (en) | 2006-07-19 | 2007-07-18 | Synthetic Resin Hollow Body Manufacturing Method |
| EP07768465A EP2046553A4 (en) | 2006-07-19 | 2007-07-18 | Manufacturing method of synthetic resin hollow body |
| US12/373,878 US7988897B2 (en) | 2006-07-19 | 2007-07-18 | Manufacturing method of synthetic resin hollow body |
| JP2008556985A JP4377447B1 (en) | 2006-07-19 | 2007-07-18 | Method for producing synthetic resin hollow body |
| CN2007800272150A CN101489754B (en) | 2006-07-19 | 2007-07-18 | Manufacturing method of synthetic resin hollow body |
| US13/106,089 US20110210481A1 (en) | 2006-07-19 | 2011-05-12 | Manufacturing method of synthetic resin hollow body |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-197498 | 2006-07-19 | ||
| JP2006197498 | 2006-07-19 | ||
| JP2007137210 | 2007-05-23 | ||
| JP2007-137210 | 2007-05-23 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/106,089 Continuation US20110210481A1 (en) | 2006-07-19 | 2011-05-12 | Manufacturing method of synthetic resin hollow body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008010600A1 true WO2008010600A1 (en) | 2008-01-24 |
Family
ID=38956927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/064536 WO2008010600A1 (en) | 2006-07-19 | 2007-07-18 | Manufacturing method of synthetic resin hollow body |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US7988897B2 (en) |
| EP (1) | EP2046553A4 (en) |
| JP (1) | JP4377447B1 (en) |
| KR (1) | KR100955337B1 (en) |
| CN (2) | CN102357980A (en) |
| BR (1) | BRPI0714396A2 (en) |
| WO (1) | WO2008010600A1 (en) |
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| WO2011007515A1 (en) | 2009-07-15 | 2011-01-20 | 三井・デュポンポリケミカル株式会社 | Resin molding device, method of manufacturing resin molding, hollow molding, and container |
| WO2011057066A1 (en) | 2009-11-05 | 2011-05-12 | E. I. Du Pont De Nemours And Company | Manufacturing method for synthetic resin hollow body |
| US8739992B2 (en) | 2010-11-09 | 2014-06-03 | Yoshida Industries Co., Ltd. | Multilayered cosmetic container |
| WO2017162958A1 (en) | 2016-03-21 | 2017-09-28 | Aptar France Sas | Method of manufacturing a container comprising a flexible pouch and a rigid shell, and such a container |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010010682A1 (en) | 2008-07-23 | 2010-01-28 | 三井・デュポンポリケミカル株式会社 | Resin molding device, resin molding method, and resin container |
| US8551385B2 (en) | 2008-07-23 | 2013-10-08 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin molding apparatus, resin molding method, and resin container |
| WO2011007515A1 (en) | 2009-07-15 | 2011-01-20 | 三井・デュポンポリケミカル株式会社 | Resin molding device, method of manufacturing resin molding, hollow molding, and container |
| WO2011057066A1 (en) | 2009-11-05 | 2011-05-12 | E. I. Du Pont De Nemours And Company | Manufacturing method for synthetic resin hollow body |
| CN102596532A (en) * | 2009-11-05 | 2012-07-18 | 纳幕尔杜邦公司 | Manufacturing method for synthetic resin hollow body |
| US8739992B2 (en) | 2010-11-09 | 2014-06-03 | Yoshida Industries Co., Ltd. | Multilayered cosmetic container |
| WO2017162958A1 (en) | 2016-03-21 | 2017-09-28 | Aptar France Sas | Method of manufacturing a container comprising a flexible pouch and a rigid shell, and such a container |
Also Published As
| Publication number | Publication date |
|---|---|
| US7988897B2 (en) | 2011-08-02 |
| BRPI0714396A2 (en) | 2013-04-02 |
| CN102357980A (en) | 2012-02-22 |
| US20110210481A1 (en) | 2011-09-01 |
| EP2046553A1 (en) | 2009-04-15 |
| CN101489754A (en) | 2009-07-22 |
| JP4377447B1 (en) | 2009-12-02 |
| EP2046553A4 (en) | 2011-03-30 |
| US20100025895A1 (en) | 2010-02-04 |
| JP2009543710A (en) | 2009-12-10 |
| KR20090052860A (en) | 2009-05-26 |
| KR100955337B1 (en) | 2010-04-29 |
| CN101489754B (en) | 2012-01-11 |
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