WO2005018902A1 - Produit moule creux, procede de fabrication dudit produit et moule metallique pour le moulage dudit produit creux - Google Patents

Produit moule creux, procede de fabrication dudit produit et moule metallique pour le moulage dudit produit creux Download PDF

Info

Publication number
WO2005018902A1
WO2005018902A1 PCT/JP2004/011554 JP2004011554W WO2005018902A1 WO 2005018902 A1 WO2005018902 A1 WO 2005018902A1 JP 2004011554 W JP2004011554 W JP 2004011554W WO 2005018902 A1 WO2005018902 A1 WO 2005018902A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow
fluid
molded product
hollow molded
molded article
Prior art date
Application number
PCT/JP2004/011554
Other languages
English (en)
Japanese (ja)
Inventor
Yasuhiro Suzuki
Original Assignee
Suzuka Fuji Xerox Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzuka Fuji Xerox Co., Ltd. filed Critical Suzuka Fuji Xerox Co., Ltd.
Publication of WO2005018902A1 publication Critical patent/WO2005018902A1/fr

Links

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/372—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings provided with means for marking or patterning, e.g. numbering 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/1717—Temperature controlled mould parts to control the location or configuration of the hollow

Definitions

  • the present invention relates to a hollow molded article molded by a hollow molding method of injecting (press-fitting) a pressurized fluid into a molten resin injected into a mold cavity and having a textured surface, a method for producing the same, And a mold for hollow molding for producing a hollow molded article.
  • gas-assist molding which is one of the hollow molding methods, can produce a hollow molded product without shrinkage and warpage (see, for example, Patent Document 1).
  • a passage for injecting a pressurized fluid into a molded article (hereinafter referred to as a “gas channel”) is provided from a fluid injection portion to the molded article to a substrate defining the molded article.
  • a rib having a width and a height larger than the wall thickness defining the thickness is formed (for example, see Patent Document 2).
  • Patent Document 1 Japanese Patent Publication No. 48-41264
  • Patent Document 2 JP-A-6-278155
  • Patent Document 3 JP-A-7-52183
  • the present invention has been made in view of such conventional problems, and improves the aesthetic appearance without providing a rib, and at a low cost without providing a material different from the mold material in the mold cavity. It is another object of the present invention to form a gas channel extending from a fluid injection part to a hollow part forming region so that a pressurized fluid can be reliably introduced.
  • a hollow portion is formed inside by injecting a pressurized fluid from a fluid injection portion, and a grain pattern is formed on at least a part of the front surface and / or the back surface.
  • a crimped pattern is formed linearly on the surface and / or back surface corresponding to the fluid flow path from the fluid injection part to the hollow part, so that the pressurized fluid can be placed at a desired position without ribs.
  • the shape of the fluid flow path projected on the front surface and the Z or the back surface is substantially the same as the shape formed by the grain pattern formed on the front surface and the Z or the back surface.
  • the hollow molded product according to claim 3 supplies a sufficient pressurized fluid to the hollow portion forming region by forming a plurality of linear crimp patterns on the front surface and Z or the back surface. Can be done.
  • the hollow molded article according to claim 4 is capable of supplying a sufficient pressurized fluid to the hollow part forming region by providing a plurality of fluid injection parts.
  • a grain pattern is formed on at least a part of the front surface and / or the back surface, and a pressurized fluid is injected from a fluid injection portion to form a hollow portion inside.
  • a grain pattern is linearly formed on the front surface and Z or the back surface from the vicinity of the fluid injection portion, and the pressurized fluid is injected from the fluid injection portion to form a line.
  • the pressurized fluid is guided along the grain pattern formed in the shape of a circle, and a hollow portion is formed at a desired position, so that a fluid flow path of the pressurized fluid is formed at a desired position without ribs, thereby enhancing the appearance and appearance.
  • a hollow molded article can be manufactured.
  • a sufficient pressurized fluid can be supplied to the hollow portion forming region.
  • the ability to supply is something that can be done.
  • the hollow molding die according to claim 8 includes a position for injecting the pressurized fluid into the mold cavity, and a hollow portion forming region for guiding the pressurized fluid from the injection position to form a hollow portion.
  • a mold for hollow molding having a fluid flow path forming area between the mold cavity surface of the fluid flow path forming area and the molded product from the injection position to a predetermined area extending to the hollow part forming area.
  • a hollow molding die capable of easily molding the above-mentioned hollow molded product. It can.
  • the grain pattern refers to a pattern formed by fine concaves and convexes appearing on the front surface, the Z surface, or the back surface of the molded product.
  • pear-faced grain sesame grain, mid-skin grain, small-skin grain, bark grain, wood-skin grain, cloth grain, arrow gas grain grain, Egypt grain, large Egypt grain, stone wall grain, and the like.
  • a force that depends on the size of the grain is applied to the mold cavity.
  • a matte grain with a depth of about 30 / m eg, a grain pattern sample from Tanako Hachiko TH-112-TH-121 is applied to the mold cavity.
  • the fluidity of the molten resin in the tee can be improved.
  • the air bubbles enter between the molten resin 4 and the mold 5 such that air 3 existing in the concave portion (valley) 2 of the grain pattern 1 is not pushed out by the flow of the molten resin 4 ( Formed).
  • the fluidity of the molten resin in the mold cavity can be improved. Therefore, the holding pressure effect at the time of solid molding, the gas pressure holding effect at the time of gas assist molding, and the like can be improved by delaying the cooling of the molten resin.
  • a portion that does not become an obstacle when the molded product is released from the mold is selected. If it is necessary to select a part that is likely to be an obstacle to demolding, change to a grain pattern and use a surface treatment with low thermal conductivity (painting, coating) or plating (plate) that has the same heat insulating effect. Can be applied to the mold cavity. For example, DLC using CVD, PVD, ceramic coats such as TiN, CrN, A1N, plating using fluorine resin as a suspension, silicon resin, and fluorine resin And the like.
  • thermoplastic resin used as a material of the hollow molded article is generally used for molding, and any type of thermoplastic resin can be used.
  • thermoplastic resins examples include polystyrene resins obtained by polymerizing styrene monomers, such as polystyrene (PS), high-impact polystyrene (HIPS, HiPS), nitrile monomers, and styrene monomers.
  • PS polystyrene
  • HIPS high-impact polystyrene
  • nitrile monomers such as atalylonitrile.
  • AS Styrene copolymer
  • nitrile monomer ⁇ Styrene monomer examples include polystyrene resins obtained by polymerizing styrene monomers, such as polystyrene (PS), high-impact polystyrene (HIPS, HiPS), nitrile monomers, and styrene monomers.
  • Styrene resin which is a copolymer with styrene, such as atalylonitrile.
  • Styrene copolymer (AS) nitrile mono
  • Resin consisting of butadiene rubber, such as acrylonitrile butadiene '' Styrene resins such as styrene copolymers (ABS, Ab S), polyolefin resins such as polyethylene (PE) and polypropylene (PP), polyphenylene ether (PPE), polycarbonate (PC), polyamide (PA), polysulfone (PSF), polyetherimide (PEI), polymethyl methacrylate (PMMA) and other engineering plastics, polyethylene tereph It is a polyester resin such as tallate (PET) or polybutylene terephthalate (PBT), a vinyl resin such as bicarbon chloride (PVC), or a mixture of two or more of the above-mentioned thermoplastic resins.
  • ABS acrylonitrile butadiene '' Styrene resins
  • polyolefin resins such as polyethylene (PE) and polypropylene (PP), polyphenylene ether (PPE), polycarbonate
  • the hollow molding method used in the present invention AGI of Asahi Chemical Industry, GPI, CGM, H 2 M, of Idemitsu Petrochemical GIM, Nippon Steel Chemical of PFP, UK Shin press, US GAIN Technol OGY, Germany
  • Gas assist molding method (hollow injection molding method) represented by national air mold and contool, and UCC method, USM method in the United States, TAF method developed by Toshiba Machinery and Asahi Dow, EX—CELL — ⁇ method, Hettinger's foam molding, New— SF, GCP method, Allied Chemical's technique, etc.
  • the foam molding method (foam injection molding method) represented by AMOTEC of Asahi Kasei Kogyo Co., Ltd. and the above-mentioned gas assist molding method combined with the gas assist molding method. It also applies to fused methods.
  • a molding resin in a molten state is injected into a cavity 42 formed by the upper mold 40 and the lower mold 41 shown in FIG.
  • a hollow molded product 20 was obtained.
  • Transparent ABS (Toyolac 920) (trade name) manufactured by Toray was used as the molding resin.
  • Fluid flow from gas injection pins 44 and 45 (fluid injection parts 22 and 23), which are injection positions of nitrogen gas as a pressurized fluid, to hollow part forming region 47 forming hollow part 24 of molded article 20
  • the mold cavity surface in the road forming region 48 is subjected to a process 46 for forming a grain pattern on the surface of the molded product.
  • a process of forming a linear matte texture 21 (TH-115) with a width of 15 mm on the surface of the hollow molded product 20 on a part of the mold cavity surface of the upper mold 40 is performed. Because of this, it was confirmed that the fluid flow path 25 was formed with a width of about 12-16 mm along the portion where the satin textures 21 were formed. In other words, the shape of the fluid flow path formed in the molded product projected on the surface of the molded product was substantially the same as the matte texture formed on the surface of the molded product.
  • Toyolac 920 (trade name) as a molding resin was injected into a mold cavity, and a hollow molded product 30 shown in Fig. 4 was obtained by gas assist molding.
  • the surface of the hollow molded product 30 is provided with a linear matte texture 31 (TH-115) having a width of 15 mm, and a gas injection pin (not shown) is installed in the fluid injection part 32, and nitrogen gas is injected. .
  • the hollow portion was formed with a width of about 16 to 20 mm along the portion where the pear-textured grain 31 was linearly formed.
  • the gas channel such as a rib was not provided in the molded product, the effect of introducing nitrogen gas, similar to the gas channel by the rib, could be obtained by adding a grain pattern to the molded product. did it.
  • Toyolac 920 (trade name) was injected into a mold cavity as a molding material, and as shown in Fig. 5 Then, a hollow molded product 10 having a plate thickness of 3 mm in which half of the surface was subjected to satin finish 12 (TH-115) by gas assist molding was obtained. On the back surface of the hollow molded product 10, a rib 13 having a height of 5 mm and a length of 350 mm is formed at the base at 60% of the thickness of the surface where the ribs stand (fillet). Nitrogen gas as a pressurized fluid was injected from the fluid injection unit 14.
  • the width of the hollow portion 15 is widened by 1830 mm, while the width of the grain pattern 12 is wider. It was confirmed that the width of the hollow portion 15 was extremely narrow, 5-8 mm, in the part without the space. Similar results were obtained when nitrogen gas was injected from the fluid injection unit 11.
  • TOYOLAC 920 (trade name) is injected into a mold cavity, and as shown in Fig. 6, a 15 mm wide linear satin-textured 51 (TH— 1 15) was applied to obtain a hollow molded product 50 having a thickness of 3 mm and a rib 54 having a width of 1.5 mm and a height of 5 mm provided on substantially half of the surface. Nitrogen gas as a pressurized fluid was injected from the fluid injection part 52.
  • the nitrogen gas travels along the linearly formed grain 51, and after arriving at the rib 54, travels along the rib 54. For this reason, the hollow portion 53 is formed along the grain 51 and the rib 54.
  • the width of the hollow portion 53 has a width S15 of 18 mm in the portion with the grain pattern 51, whereas the width of the hollow portion 53 has a width of 5 to 1 in the portion with the rib 54. It was confirmed that it became as narrow as 9 mm.
  • the grain pattern has the effect of facilitating the injection of the pressurized fluid because it is difficult to lower the temperature of the molten resin.
  • the force is not limited to a linear one as a grain pattern, but may be a curved one as long as it is a linear one.
  • FIG. 1 is an explanatory diagram of a function effect of a grain pattern.
  • FIG. 2 is a sectional view showing a mold for hollow molding. (Example 1)
  • FIG. 3 is a perspective view showing a hollow molded product. (Example 1)
  • FIG. 4 is a perspective view showing a hollow molded product. (Example 2)
  • FIG. 5 is a perspective view showing a hollow molded product. (Example 3)
  • FIG. 6 is a perspective view showing a hollow molded product. (Example 4)

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Lorsqu'un produit moulé creux est fabriqué par introduction de gaz dans une résine fondue, une nervure généralement formée en tant que passage de flux de gaz détériore l'apparence du produit moulé creux par l'inégalité de brillant produite lorsqu'un rétrécissement, un élément appliqué par presse de transfert ou une partie creuse sont formés sur la surface du produit moulé creux. Selon la présente invention, une partie creuse est formée dans le produit moulé creux par introduction d'un fluide sous pression provenant d'une partie de remplissage de fluide, et une zone bosselée est formée sur une partie de la surface avant ou de la surface arrière du produit moulé, correspondant au passage de flux de fluide commençant au niveau de la partie de remplissage de fluide et se terminant dans la partie creuse. Par conséquent, la partie bosselée peut assumer la fonction de passage de gaz.
PCT/JP2004/011554 2003-08-22 2004-08-11 Produit moule creux, procede de fabrication dudit produit et moule metallique pour le moulage dudit produit creux WO2005018902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003298138 2003-08-22
JP2003-298138 2003-08-22

Publications (1)

Publication Number Publication Date
WO2005018902A1 true WO2005018902A1 (fr) 2005-03-03

Family

ID=34213707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/011554 WO2005018902A1 (fr) 2003-08-22 2004-08-11 Produit moule creux, procede de fabrication dudit produit et moule metallique pour le moulage dudit produit creux

Country Status (1)

Country Link
WO (1) WO2005018902A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11465321B2 (en) * 2014-11-04 2022-10-11 Yasuhiro Suzuki Mold device, injection molding system and method for manufacturing molded article

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0780883A (ja) * 1993-09-14 1995-03-28 Asahi Chem Ind Co Ltd 中空射出成形品及びその中空射出成形方法
JPH07164486A (ja) * 1993-12-16 1995-06-27 Mitsubishi Gas Chem Co Inc 成形用金型
WO1996016783A1 (fr) * 1994-11-25 1996-06-06 Asahi Kasei Kogyo Kabushiki Kaisha Procede ameliore de moulage par injection permettant de produire un objet en resine moule par soufflage, et moule utilise selon ledit procede
JPH1015981A (ja) * 1996-06-26 1998-01-20 Toyoda Gosei Co Ltd 中空成形体の製造方法
JPH10296800A (ja) * 1997-04-23 1998-11-10 Mitsubishi Eng Plast Kk 射出成形品の成形方法及び射出成形用の金型
JP2001328122A (ja) * 2000-03-14 2001-11-27 Nissan Motor Co Ltd 樹脂成形金型及びこれを用いた樹脂成形体の成形方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0780883A (ja) * 1993-09-14 1995-03-28 Asahi Chem Ind Co Ltd 中空射出成形品及びその中空射出成形方法
JPH07164486A (ja) * 1993-12-16 1995-06-27 Mitsubishi Gas Chem Co Inc 成形用金型
WO1996016783A1 (fr) * 1994-11-25 1996-06-06 Asahi Kasei Kogyo Kabushiki Kaisha Procede ameliore de moulage par injection permettant de produire un objet en resine moule par soufflage, et moule utilise selon ledit procede
JPH1015981A (ja) * 1996-06-26 1998-01-20 Toyoda Gosei Co Ltd 中空成形体の製造方法
JPH10296800A (ja) * 1997-04-23 1998-11-10 Mitsubishi Eng Plast Kk 射出成形品の成形方法及び射出成形用の金型
JP2001328122A (ja) * 2000-03-14 2001-11-27 Nissan Motor Co Ltd 樹脂成形金型及びこれを用いた樹脂成形体の成形方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11465321B2 (en) * 2014-11-04 2022-10-11 Yasuhiro Suzuki Mold device, injection molding system and method for manufacturing molded article

Similar Documents

Publication Publication Date Title
US20070096359A1 (en) Method for surface marking a molded article
AU2003206835A1 (en) Injection molded body having self-cleaning properties, and method for producing injection molded bodies of this type
KR100235933B1 (ko) 중공수지성형체를 제조하기 위한 개량된 사출성형방법 및 이 방법에 사용하기 위한 금형
WO2000078527A1 (fr) Procede de moulage par soufflage, produit moule par soufflage et moule de moulage par soufflage
WO2005018902A1 (fr) Produit moule creux, procede de fabrication dudit produit et moule metallique pour le moulage dudit produit creux
EP0545693A1 (fr) Article moulé par injection ayant un aspect de haute qualité
US20030099809A1 (en) Removable defined flange for in-mold coating containment
JP2010089359A (ja) エンボス加飾一体成形品及びその製造方法
JP2010234647A (ja) 型内塗装品の製造方法およびこれに使用する金型
US20090134549A1 (en) Molding Apparatus
JP2015223732A (ja) 射出成形用金型
JP2009166344A (ja) 発泡成形金型装置及びそれを用いた発泡成形体の成形方法
JP4500192B2 (ja) 金型内塗装成形方法、成形品及び金型
JPH10296800A (ja) 射出成形品の成形方法及び射出成形用の金型
JP2004181630A (ja) 発泡体内装中空成形品およびその製造方法
JP2008023830A (ja) 表皮付き樹脂成形品及びその成形方法
EP1501668B1 (fr) Procede de controle selectif du debit de revetement dans le moule, regulation du debit d'entree et collerette de confinement amovible
JP3790317B2 (ja) ガス併用射出成形法
JP2012076302A (ja) 表面シートを用いたインサート成形用金型及び成形物の製造方法
JP5595679B2 (ja) 射出成形時における洩れ防止構造
JPH05329883A (ja) 加飾成形品の製造方法
JP2005111820A (ja) 多色成形品の成形方法、および多色成形品
JPH11314241A (ja) ガス加圧射出成形法
JPH03138126A (ja) 均一薄肉中空成形品の射出成形方法
JP4155912B2 (ja) 被覆付樹脂成形品及びその成形型

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP