JPH10217291A - Manufacture of cylindrical body for office automation - Google Patents
Manufacture of cylindrical body for office automationInfo
- Publication number
- JPH10217291A JPH10217291A JP9040165A JP4016597A JPH10217291A JP H10217291 A JPH10217291 A JP H10217291A JP 9040165 A JP9040165 A JP 9040165A JP 4016597 A JP4016597 A JP 4016597A JP H10217291 A JPH10217291 A JP H10217291A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- mold
- movable mold
- cylindrical
- cylindrical body
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000000465 moulding Methods 0.000 claims abstract description 22
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 16
- 108091008695 photoreceptors Proteins 0.000 claims description 13
- 238000005304 joining Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008961 swelling Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 38
- 239000000463 material Substances 0.000 description 19
- 239000000049 pigment Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 229920000515 polycarbonate Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002216 antistatic agent Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000007733 ion plating Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920001230 polyarylate Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- DDTHMESPCBONDT-UHFFFAOYSA-N 4-(4-oxocyclohexa-2,5-dien-1-ylidene)cyclohexa-2,5-dien-1-one Chemical class C1=CC(=O)C=CC1=C1C=CC(=O)C=C1 DDTHMESPCBONDT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- QLNFINLXAKOTJB-UHFFFAOYSA-N [As].[Se] Chemical compound [As].[Se] QLNFINLXAKOTJB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene group Chemical class C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 1
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 150000008376 fluorenones Chemical class 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- WCPAKWJPBJAGKN-UHFFFAOYSA-N oxadiazole Chemical compound C1=CON=N1 WCPAKWJPBJAGKN-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- DNXIASIHZYFFRO-UHFFFAOYSA-N pyrazoline Chemical compound C1CN=NC1 DNXIASIHZYFFRO-UHFFFAOYSA-N 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/261—Moulds having tubular mould cavities
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2714—Gates elongated, e.g. film-like, annular
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機、プリンタ
ー、ファックス等の電子写真装置や静電記録装置などに
使用される各種ローラ類，感光体などに代表されるＯＡ
機器用円筒体の製造方法に係り、特に工程数の削減を図
ることができると共に、寸法精度に優れた樹脂製の円筒
体を効率よく確実に得ることができるＯＡ機器用円筒体
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an OA represented by various rollers and a photoreceptor used in an electrophotographic apparatus such as a copying machine, a printer, a facsimile, and an electrostatic recording apparatus.
The present invention relates to a method for manufacturing a cylindrical body for an instrument, and more particularly to a method for manufacturing a cylindrical body for an OA apparatus which can reduce the number of steps and can efficiently and reliably obtain a resin cylindrical body having excellent dimensional accuracy. .
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】一般
に、複写機、プリンター、ファックス等に代表される画
像形成装置などの電子写真装置や静電記録装置は、円筒
状の感光体を備えており、この感光体に対して帯電、露
光を行って静電潜像を形成した後、該感光体上にトナー
を供給して潜像にトナーを付着させることにより現像
し、この感光体上のトナー像を紙、印画紙、ＯＨＰフィ
ルム等の記録媒体に転写し、記録媒体上に転写されたト
ナーを溶融・圧着させることにより、記録媒体に定着さ
せる一連の作業によってプリントを行うようになってい
る。またこの場合、上記一連の作業が一旦終了した後、
上記感光体を所定の電位に除電すると共に、感光体上に
残留するトナーを除去してクリーニングし、次のプリン
トに備えるようになっている。2. Description of the Related Art Generally, an electrophotographic apparatus such as an image forming apparatus represented by a copying machine, a printer, a facsimile and the like and an electrostatic recording apparatus have a cylindrical photosensitive member. After charging and exposing the photosensitive member to form an electrostatic latent image, toner is supplied onto the photosensitive member and developed by attaching toner to the latent image. The image is transferred to a recording medium such as paper, photographic paper, an OHP film, and the toner transferred onto the recording medium is melted and pressed to fix the recording medium. . Also, in this case, after the above series of work is once completed,
The photosensitive member is neutralized to a predetermined potential, and toner remaining on the photosensitive member is removed and cleaned to prepare for the next print.
【０００３】このような画像形成装置では、感光体、帯
電ローラ、転写ローラ、現像ローラ、クリーニングロー
ラ、トナー搬送ローラ、給紙ローラ等に円筒体が使用さ
れているが、近年の電子写真技術の進歩にともなって、
様々な要求特性が課せられるようになってきており、そ
の一つとして寸法精度に対する要求がある。特に、これ
らのＯＡ機器用円筒体のうちでも感光体は、上記一連の
プリント作業で果たす機能が得られる画像に大きく影響
することから、更に厳しい寸法精度が必要とされ、寸法
精度の高い円筒体を生産性よく製造することが求められ
る。In such an image forming apparatus, a cylindrical body is used for a photosensitive member, a charging roller, a transfer roller, a developing roller, a cleaning roller, a toner conveying roller, a paper feeding roller, and the like. With progress,
Various required characteristics have been imposed, and one of them is a requirement for dimensional accuracy. In particular, among these cylinders for OA equipment, the photoreceptor greatly influences the image obtained by the above-described series of printing operations, so that stricter dimensional accuracy is required. Is required to be manufactured with high productivity.
【０００４】従来、感光体用の円筒状基体は、鉄、銅、
ステンレス、アルミニウム等の金属を使用して製造され
ているが、この場合小径の感光体を製造するには、これ
ら材料の加工性が悪いために真円度，同心度，真直度等
の精度やコストの点で欠点があり、これを感光体に使用
した場合には、画像むらやクリーニング不良が発生した
り、多大なコスト高を招くこととなる。Conventionally, cylindrical substrates for photoreceptors have been made of iron, copper,
It is manufactured using metals such as stainless steel and aluminum. In this case, in order to manufacture a small-diameter photoreceptor, the accuracy or roundness, concentricity, straightness, etc., of the material is poor due to poor workability of these materials. There is a drawback in terms of cost, and if this is used for a photoreceptor, image unevenness or poor cleaning will occur, or the cost will be greatly increased.
【０００５】また、最近では、このような問題を解決す
るために、従来からの金属に代えて軽量で加工性に優れ
た熱可塑性樹脂組成物を用いて円筒状或いは円柱状に押
し出し成形し、その外周面を粗研磨することにより、感
光体用の基体を製造することも提案されている（特開平
８−２７２１１７号公報）。[0005] Recently, in order to solve such a problem, instead of a conventional metal, a lightweight and excellent workability thermoplastic resin composition is extruded into a cylindrical shape or a cylindrical shape. It has also been proposed to manufacture a substrate for a photoreceptor by roughly polishing the outer peripheral surface thereof (Japanese Patent Laid-Open No. 8-272117).
【０００６】しかしながら、熱可塑性樹脂組成物を押し
出し成形した後に、研磨加工する方法は、比較的良好な
寸法精度を有する円筒体を得ることができるが、押し出
し成形時に成形品の表面にウェルドラインが残るため、
高度な表面研磨を行わなければならず、多大な工数を要
し、製造工程が煩雑になるという問題がある。[0006] However, the method of polishing after extruding the thermoplastic resin composition can obtain a cylindrical body having relatively good dimensional accuracy, but a weld line is formed on the surface of the molded article at the time of extrusion molding. To remain
There is a problem that a high level of surface polishing must be performed, a large number of steps are required, and the manufacturing process is complicated.
【０００７】また、上記特開平８−２７２１１７号公報
にも記載されているが、射出成形により熱可塑性樹脂組
成物から感光体用の円筒状基体を得ようとすると、満足
な寸法精度を得ることができず、この射出成形による方
法は、未だ実用化には至っていない。Further, as described in the above-mentioned Japanese Patent Application Laid-Open No. 8-272117, when obtaining a cylindrical base for a photoreceptor from a thermoplastic resin composition by injection molding, satisfactory dimensional accuracy is obtained. However, this injection molding method has not yet been put to practical use.
【０００８】一方、複写機等の小型化に伴い、ドラム状
感光体の内側から感光を行う背面露光方式で画像形成を
行う方法についての検討も近年盛んに行われている。即
ち、この方式は、画像形成装置を小型化する目的のた
め、透光性の円筒状支持体上に透光性導電層と光導電体
層とを積層した小型の円筒状感光体の内側に、画像情報
に応じて光出力を行う露光ヘッドを内挿し、この露光ヘ
ッドの光出力を収束化して上記光導電体層に潜像を結像
させると同時又はその直後に、感光体の外側に対面配置
した現像手段により潜像をトナー像化した後、該トナー
像を転写ローラ、その他の転写手段により普通紙等に転
写して、画像の形成，記録を行うものである（特開昭５
８−４４４４５号公報）。On the other hand, with the miniaturization of copiers and the like, studies on a method of forming an image by a back exposure method in which exposure is performed from the inside of a drum-shaped photosensitive member have been actively conducted in recent years. That is, in this method, for the purpose of reducing the size of the image forming apparatus, a light-transmitting conductive layer and a photoconductor layer are laminated on a light-transmitting cylindrical support inside a small cylindrical photoconductor. At the same time as or immediately after the exposure head that performs light output according to image information is interpolated and the latent image is formed on the photoconductor layer by converging the light output of the exposure head and immediately after that, outside the photoconductor. After the latent image is formed into a toner image by developing means arranged face-to-face, the toner image is transferred to plain paper or the like by a transfer roller or other transfer means to form and record an image (Japanese Patent Application Laid-Open No. Sho.
8-44445).
【０００９】この背面露光方式には、感光体の基体とし
て透明な円筒体が必要となるが、ガラス製ではコスト，
品質，破壊等が問題になるため樹脂製の透明円筒体が求
められる。しかしながら、上述のように樹脂製の円筒状
基体には、寸法精度及び生産性等の問題があり、性能及
び生産性の両面を満足する樹脂製円筒体が得られていな
いのが現状である。In this back exposure method, a transparent cylindrical body is required as a base of the photoreceptor.
Since quality and destruction become problems, a transparent cylindrical body made of resin is required. However, as described above, the resin-made cylindrical base has problems such as dimensional accuracy and productivity, and at present, a resin-made cylindrical body satisfying both performance and productivity has not been obtained.
【００１０】本発明は、上記事情に鑑みなされたもの
で、寸法精度に優れる樹脂製の円筒体を工数を増加させ
ることなく生産性よく製造することができるＯＡ機器用
円筒体の製造方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method of manufacturing a cylinder for OA equipment capable of manufacturing a resin cylinder excellent in dimensional accuracy without increasing the number of steps. The purpose is to do.
【００１１】[0011]
【課題を解決するための手段】本発明者は、上記目的を
達成するため鋭意検討を行った結果、射出成形により樹
脂製の円筒体を製造する場合に、金型の円筒状キャビテ
ィーの片端部に該キャビティーを周方向に沿って１周す
るフィルムゲートを形成し、該フィルムゲートを通して
キャビティー内に熱可塑性樹脂を射出注入することによ
り、真円度が良好で寸法精度に優れた円筒体を容易かつ
確実に成形することができることを見出した。Means for Solving the Problems The present inventor has made intensive studies to achieve the above object, and as a result, when manufacturing a resin cylindrical body by injection molding, one end of a cylindrical cavity of a mold has been obtained. A cylinder with good roundness and excellent dimensional accuracy is formed by forming a film gate that goes around the cavity one time along the circumferential direction and injecting thermoplastic resin into the cavity through the film gate. It has been found that the body can be molded easily and reliably.
【００１２】即ち、従来から射出成形法ではキャビティ
ー内に樹脂を注入するゲートとしてピンゲートやサイド
ゲートが一般的に採用されるが、これらピンゲートやサ
イドゲートを採用した場合、ウェルドの発生により部分
的に表面が盛り上がる等の変形が生じ、十分な寸法精度
や真円度が得られにくいが、上述のように、円筒状キャ
ビティーの片端部に該キャビティーを周方向に沿って１
周するフィルムゲートを形成し、円筒状キャビティーの
端部の全周から均一に樹脂を注入充填することにより、
ウェルドの発生による盛り上がり等の変形を効果的に防
止し得、寸法精度，真円度の良好な円筒状成形体を確実
に得ることができ、成形後の研磨加工などを行うことな
しに、又は該研磨加工を簡略しても容易に良好な寸法精
度を有する円筒体が得られることを見出し、本発明を完
成したものである。That is, conventionally, in the injection molding method, a pin gate or a side gate is generally employed as a gate for injecting a resin into a cavity. However, when such a pin gate or a side gate is employed, a partial generation occurs due to the occurrence of weld. However, it is difficult to obtain sufficient dimensional accuracy and roundness. However, as described above, one end of the cylindrical cavity is formed along the circumferential direction.
By forming a film gate to go around and injecting and filling resin uniformly from the entire periphery of the end of the cylindrical cavity,
Deformation such as swelling due to the occurrence of welds can be effectively prevented, and a cylindrical molded body having good dimensional accuracy and roundness can be reliably obtained without polishing after molding, or It has been found that a cylindrical body having good dimensional accuracy can be easily obtained even if the polishing is simplified, and the present invention has been completed.
【００１３】従って、本発明は、円筒状のキャビティー
を有する金型内に熱可塑性樹脂を射出注入して樹脂製円
筒体を成形する円筒体の製造方法において、上記円筒状
キャビティーの片端部に該キャビティーを周方向に沿っ
て１周するフィルムゲートを形成し、該フィルムゲート
を通してキャビティー内に上記熱可塑性樹脂を射出注入
することを特徴とするＯＡ機器用円筒体の製造方法を提
供するものである。Accordingly, the present invention relates to a method for manufacturing a cylindrical body, in which a thermoplastic resin is molded by injection injection of a thermoplastic resin into a mold having a cylindrical cavity. Forming a film gate surrounding the cavity along the circumferential direction, and injecting the thermoplastic resin into the cavity through the film gate. Is what you do.
【００１４】この場合、本発明の製造方法においては、
特に制限されるものではないが、上記金型として、固定
金型と、両端が開放した円柱状のキャビティーを有する
第１可動金型と、円柱状のコアを有する第２可動金型と
からなり、上記固定金型に上記第１可動金型の一端面を
接合し、かつ該第１可動金型他端面に上記第２可動金型
を接合して、該第２可動金型のコアを第１可動金型のキ
ャビティー内に挿入し、第１可動金型のキャビティー内
周面と上記コア外周面との間に円筒状のキャビティーを
形成すると共に、上記固定金型と第１可動金型とのパー
ティング面に上記円筒状キャビティーを周方向に沿って
１周するフィルムゲートを形成したものを用いることが
好ましい。In this case, in the production method of the present invention,
Although not particularly limited, the mold includes a fixed mold, a first movable mold having a cylindrical cavity with both ends open, and a second movable mold having a cylindrical core. Then, one end face of the first movable mold is joined to the fixed mold, and the second movable mold is joined to the other end face of the first movable mold, thereby forming a core of the second movable mold. The cylindrical mold is inserted into the cavity of the first movable mold to form a cylindrical cavity between the inner peripheral surface of the cavity of the first movable mold and the outer peripheral surface of the core. It is preferable to use one in which a film gate is formed on the parting surface with the movable mold so as to make one round of the cylindrical cavity along the circumferential direction.
【００１５】即ち、このような固定金型と第１可動金型
と第２可動金型とからなる３分割の金型を用いることに
より、固定金型に設けられたスプルーから固定金型と第
２可動金型とのパーティング面に設けられたフィルムゲ
ートを通して上記キャビティー内に樹脂を充填して円筒
体を成形した後、まず第２可動金型を第１可動金型から
分離して、円筒状の成形物を第１可動金型内に保持した
状態で該成形物内から第２可動金型に設けられた円柱状
のコアを抜き取り、次いで第１可動金型を固定金型から
分離して、円筒状の成形物を固定金型に保持した状態で
該成形物を第１可動金型のキャビティー内から抜き取
り、固定金型側からの突き出しにより、スプルー及びゲ
ート内の樹脂硬化物ごと円筒状成形物を固定金型から外
し、円筒状の形成物を金型から脱型することができるも
のである。That is, by using such a three-part mold composed of the fixed mold, the first movable mold, and the second movable mold, the fixed mold and the second mold are separated from the sprue provided in the fixed mold. After filling the cavity with a resin through a film gate provided on the parting surface with the 2 movable mold to form a cylindrical body, first, the second movable mold is separated from the first movable mold, With the cylindrical molded product held in the first movable die, the columnar core provided on the second movable die is removed from the molded product, and then the first movable die is separated from the fixed die. Then, while holding the cylindrical molded product in the fixed mold, the molded product is extracted from the cavity of the first movable mold, and is protruded from the fixed mold side, so that the cured resin material in the sprue and the gate is removed. The cylindrical molded product is removed from the fixed mold together with the cylindrical molded product. Those that can be removed from the mold.
【００１６】このように、成形物が硬化した後に該成形
物を第１可動金型に安定的に保持した状態で該成形物の
内空部を形成する第２可動金型のコアを抜くことができ
るので、細径薄肉の円筒体であっても歪みや変形を生じ
ることなく、確実に脱型することができ、より確実に寸
法精度の優れた円筒体を得ることができるものである。As described above, after the molded article is cured, the core of the second movable mold forming the inner space of the molded article is removed while the molded article is stably held in the first movable mold. Therefore, even if the cylinder has a small diameter and a small thickness, the cylinder can be reliably removed from the cylinder without distortion or deformation, and a cylinder having excellent dimensional accuracy can be obtained more reliably.
【００１７】更に、このような３分割の金型を用いる場
合には、特に制限されるものではないが、上記固定金型
と上記第１可動金型とのパーティング面、上記第１可動
金型と上記第２可動金型とのパーティング面、及び上記
固定金型と上記第２可動金型のコア先端とのパーティン
グ面に、それぞれ凸部と凹部とを設けて互いに嵌合させ
ることにより各金型間を位置決めして接合すると共に、
凸部の外周面と凹部の内周面とをテーパー面として各金
型間の接合，分離を容易ならしめるようにすることが好
ましい。Further, when such a three-part mold is used, although not particularly limited, the parting surface between the fixed mold and the first movable mold, the first movable mold, Protrusions and recesses are provided on the parting surfaces of the mold and the second movable mold and on the parting surfaces of the fixed mold and the core end of the second movable mold, respectively, and are fitted to each other. By positioning and joining between the molds,
It is preferable that the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion are tapered to facilitate joining and separation between the molds.
【００１８】即ち、このように、各分割型のパーティン
グ面に互いに嵌合する凹凸を設けることにより、固定金
型と第１可動金型とのパーティング面における凹凸の嵌
合及び第１可動金型と第２可動金型とのパーティング面
における凹凸の嵌合によって、第１可動金型のキャビテ
ィーの中心軸と、第２可動金型のコアの中心軸とを確実
かつ高精度に合わせることができ、しかもコア先端と固
定金型とのパーティング面における凹凸の嵌合により射
出圧によるコアのぶれを確実に防止することができ、よ
り寸法精度の優れた円筒体を成形することができるもの
である。また、この場合凸部の外周面と凹部の内周面に
形成されたテーパー面の作用によって、各金型間の接
合，分離は容易かつ確実に行うことができるものであ
る。That is, as described above, by providing the projections and depressions fitting each other on the parting surfaces of the respective split dies, the fitting of the projections and depressions on the parting surfaces of the fixed die and the first movable die and the first movable die are performed. The central axis of the cavity of the first movable mold and the central axis of the core of the second movable mold can be reliably and accurately aligned by fitting the unevenness on the parting surface between the mold and the second movable mold. It is possible to form a cylindrical body with better dimensional accuracy, which can be matched, and the core can be reliably prevented from being shaken due to the injection pressure by fitting the unevenness on the parting surface between the core tip and the fixed mold. Can be done. In this case, the bonding and separation between the dies can be performed easily and reliably by the action of the tapered surface formed on the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion.
【００１９】このように、本発明のＯＡ機器用円筒体の
製造方法によれば、寸法精度に優れる樹脂製の円筒体を
工数を増加させることなく生産性よく製造することがで
きるものである。As described above, according to the method for manufacturing a cylinder for OA equipment of the present invention, a resin cylinder having excellent dimensional accuracy can be manufactured with high productivity without increasing the number of steps.
【００２０】[0020]
【発明の実施の形態及び実施例】以下、本発明の製造方
法に用いられる金型の一例を示し、本発明につきより具
体的に説明する。本発明のＯＡ機器用円筒体の製造方法
は、上述のように、筒状のキャビティーを有する金型内
に熱可塑性樹脂を射出注入して樹脂製円筒体を射出成形
する場合に、上記金型として、上記キャビティーの片端
部に該キャビティーを周方向に沿って１周するフィルム
ゲートを設けたものを用いたものであり、このような金
型の一例として図１〜５に示した金型を例示することが
できる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of a mold used in the manufacturing method of the present invention will be shown, and the present invention will be described more specifically. As described above, the method for manufacturing a cylindrical body for OA equipment according to the present invention uses the above-described metal mold when the thermoplastic resin is injected into a mold having a cylindrical cavity to injection-mold a resin cylindrical body. As the mold, a mold provided with a film gate which makes one round of the cavity along the circumferential direction is used at one end of the cavity. An example of such a mold is shown in FIGS. A mold can be exemplified.
【００２１】この金型は、図１〜５に示されているよう
に、樹脂が通るスプルー１１を有する固定金型１と、両
端部が開放した円柱状のキャビティー２１を有する第１
可動金型２と、上記キャビティー２１の内径よりも小径
の円柱状のコア３１が突設された第２可動金型３とを具
備している。As shown in FIGS. 1 to 5, this mold has a fixed mold 1 having a sprue 11 through which a resin passes, and a first mold having a cylindrical cavity 21 having both open ends.
The movable mold 2 includes a movable mold 2 and a second movable mold 3 having a columnar core 31 having a diameter smaller than the inner diameter of the cavity 21.
【００２２】上記固定金型１には、図４，５に示されて
いるように、キャビティー形成側（図中、右側）の面に
内周面がテーパー状に形成された円形の大径凹部１２が
形成されており、かつこの凹部１２の中心部に更に内周
面がテーパー状に形成された円形の小径凹部１３が形成
されている。また、この固定金型１には、上記大径凹部
１２の内側でかつ上記小径凹部１３の外側に存して、金
型外部から成形樹脂を金型内に導入するための上記スプ
ルー１１が形成されている。As shown in FIGS. 4 and 5, the fixed mold 1 has a circular large diameter having an inner peripheral surface formed in a tapered shape on the surface on the cavity forming side (the right side in the drawings). A concave portion 12 is formed, and a circular small-diameter concave portion 13 having an inner peripheral surface formed in a tapered shape is formed at the center of the concave portion 12. The fixed mold 1 has the sprue 11 inside the large-diameter recess 12 and outside the small-diameter recess 13 for introducing molding resin into the mold from outside the mold. Have been.
【００２３】次に、上記第１可動金型２は、両端部が開
放した円柱状のキャビティー２１が軸方向に沿って形成
されたものである。この第１可動金型２の上記固定金型
１と接合する一端面（図中、左側の端面）には、図４，
５に示されているように、上記固定金型の大径凹部１２
と嵌合する外周面がテーパー面となった円形の凸部２２
が形成されていると共に、図３に示されているように、
後述する第２可動金型３が接合する他端面（図中、右側
の端面）にも、内周面がテーパー状に形成された円形の
凸部２３が形成されており、上記キャビティー２１の両
端面は、いずれもこれら凸部２２，２３の中心部に開放
している。Next, the first movable mold 2 is formed by forming a columnar cavity 21 having both open ends along the axial direction. One end face (left end face in the figure) of the first movable mold 2 which is joined to the fixed mold 1 is provided with FIG.
As shown in FIG. 5, the large-diameter concave portion 12 of the fixed mold is provided.
Circular projection 22 having an outer peripheral surface that is fitted with a tapered surface
Are formed, and as shown in FIG.
A circular convex portion 23 having an inner peripheral surface formed in a tapered shape is also formed on the other end surface (the right end surface in the drawing) to which the second movable mold 3 described later is joined. Both end surfaces are open to the center of these convex portions 22 and 23.
【００２４】この第１可動金型２は、図１に示されてい
るように、上記固定金型１に分離可能に接合されるもの
であり、このとき図１〜４に示されているように、固定
金型１に形成された上記大径凹部１２内に第１可動金型
２の上記凸部２２が嵌合して正確に位置決めされる。ま
た、この第１可動金型２と固定金型１とのパーティング
面ｐ１には、第１可動金型２の上記キャビティー２１の
外周側を周方向に沿って１周するフィルムゲート４が形
成されると共に、このフィルムゲート４と上記スプルー
１１とを連絡するリング状のランナー４１が形成される
ようになっている。As shown in FIG. 1, the first movable mold 2 is detachably joined to the fixed mold 1, and at this time, as shown in FIGS. Then, the convex portion 22 of the first movable mold 2 is fitted in the large-diameter concave portion 12 formed in the fixed mold 1 to be accurately positioned. On the parting surface p1 of the first movable mold 2 and the fixed mold 1, there is provided a film gate 4 that makes one round along the outer peripheral side of the cavity 21 of the first movable mold 2 in the circumferential direction. In addition, a ring-shaped runner 41 that connects the film gate 4 and the sprue 11 is formed.
【００２５】また、上記第２可動金型３は、図３に示さ
れているように、上記第１可動金型２と接合する一端面
（図中、左側の端面）に、該第１可動金型２の上記凸部
２３と嵌合する外周面がテーパー面となった円形の凹部
３２が形成されていると共に、該凹部３２の中心部に円
柱状のコア３１が突設されたものであり、このコア３１
の先端部にも固定金型１の上記小径凹部１３内に嵌合す
る外周面がテーパー状となった円形の凸部３３が形成さ
れている。As shown in FIG. 3, the second movable mold 3 is provided on one end face (the left end face in the figure) of the first movable mold 2 to be joined to the first movable mold 2. A circular concave portion 32 having an outer peripheral surface fitted with the convex portion 23 of the mold 2 and having a tapered surface is formed, and a cylindrical core 31 is protruded from a central portion of the concave portion 32. Yes, this core 31
A circular convex portion 33 whose outer peripheral surface is fitted into the small-diameter concave portion 13 of the fixed mold 1 is tapered.
【００２６】この第２可動金型３は、シリンダー５によ
り上記第１可動金型２と接合，分離可能に連結されてお
り、更にこれら第１及び第２両可動金型２，３が共に固
定金型１に対して進退し得るようになっている。The second movable mold 3 is joined to and separated from the first movable mold 2 by a cylinder 5 so that the first and second movable molds 2 and 3 are fixed together. The mold 1 can move forward and backward.
【００２７】ここで、この第２可動金型３は、図１，２
に示されているように、上記第１可動金型２に接合する
ことにより、そのコア３１が第１可動金型２のキャビテ
ィー２１内に軸線に沿って挿入され、このコア３１の外
周面とキャビティー２１の内周面との間に円筒状の成形
用キャビティー６（図１参照）が形成される。このと
き、第２可動金型３の上記凹部３２と第１可動金型２の
凸部２３とが嵌合すると共に、コア３１先端部の上記凸
部３３が固定金型１の上記小径凹部１３に嵌合して第２
可動金型３が正確に位置決めされ、コア３１の軸線とキ
ャビティー２１の軸線とが一致した状態で確実に第２可
動金型３と第１可動金型２とが接合するようになってい
る。これにより、真円度，同心度，真直度等の寸法精度
に優れた円筒状の成形用キャビティー６（図１参照）が
確実に形成される。Here, the second movable mold 3 is shown in FIGS.
As shown in FIG. 2, by joining to the first movable mold 2, the core 31 is inserted into the cavity 21 of the first movable mold 2 along the axis, and the outer peripheral surface of the core 31 is formed. A cylindrical molding cavity 6 (see FIG. 1) is formed between the cavity and the inner peripheral surface of the cavity 21. At this time, the concave portion 32 of the second movable mold 3 and the convex portion 23 of the first movable mold 2 are fitted together, and the convex portion 33 at the tip of the core 31 is connected to the small-diameter concave portion 13 of the fixed mold 1. Mated with the second
The movable mold 3 is accurately positioned, and the second movable mold 3 and the first movable mold 2 are securely joined in a state where the axis of the core 31 and the axis of the cavity 21 are aligned. . As a result, a cylindrical molding cavity 6 (see FIG. 1) having excellent dimensional accuracy such as roundness, concentricity, and straightness is reliably formed.
【００２８】この金型を用い、本発明に従って円筒体を
成形する場合は、まず図１に示されているように、固定
金型１，第１可動金型２及び第２可動金型３を接合させ
て、金型内に円筒状の成形用キャビティー６を形成す
る。When a cylindrical body is formed using this mold according to the present invention, first, as shown in FIG. 1, the fixed mold 1, the first movable mold 2 and the second movable mold 3 are assembled. By joining, a cylindrical molding cavity 6 is formed in the mold.
【００２９】この状態で、図２に示されているように、
固定金型１のスプルー１１から成形用の熱可塑性樹脂材
料７を加熱溶融した状態で金型内に導入し、上記ランナ
ー４１を介して上記フィルムゲート４から上記成形用キ
ャビティー６内に射出注入して該成形用キャビティー６
内に熱可塑性樹脂材料７を充填する。そして、この熱可
塑性樹脂材料７を上記成形キャビティー６内で冷却硬化
させて円筒体を成形する。In this state, as shown in FIG.
The thermoplastic resin material 7 for molding is introduced into the mold while being heated and melted from the sprue 11 of the fixed mold 1, and injected into the molding cavity 6 from the film gate 4 through the runner 41. And the molding cavity 6
Is filled with a thermoplastic resin material 7. Then, the thermoplastic resin material 7 is cooled and hardened in the molding cavity 6 to form a cylindrical body.
【００３０】このとき、この金型では、溶融樹脂７を成
形キャビティー６内に射出注入するゲートとして、円筒
状の成形用キャビティー６の片端部外周側に該キャビテ
ィー６を周方向に沿って１周するフィルムゲート４を用
いているので、円筒状の成形キャビティー６端部の全周
から均一に樹脂７が注入充填され、従来のピンゲートや
サイドゲートを用いた場合に見られるウェルドの発生に
よる盛り上がり等の変形を効果的に防止し得る。しか
も、成形用キャビティー６は、上述のように正確な寸法
に成形されている上、固定金型１の小径凹部１３とコア
３１先端の凸部３３が嵌合して位置決めされているため
射出圧によりコア３１に偏芯等のぶれが生じることもな
く、真円度，同心度及び真直度等の寸法精度に優れる円
筒体が確実に成形される。At this time, in this mold, as a gate for injecting and injecting the molten resin 7 into the molding cavity 6, the cavity 6 is circumferentially arranged on one outer peripheral side of one end of the cylindrical molding cavity 6. Since the film gate 4 is used to make one round, the resin 7 is uniformly injected and filled from the entire circumference of the end of the cylindrical molding cavity 6, and the weld gate which is seen when a conventional pin gate or side gate is used is used. Deformation such as swelling due to occurrence can be effectively prevented. Moreover, since the molding cavity 6 is molded to the exact dimensions as described above, and the small-diameter concave portion 13 of the fixed mold 1 and the convex portion 33 at the tip of the core 31 are fitted and positioned, the injection is performed. A cylinder having excellent dimensional accuracy, such as roundness, concentricity, and straightness, can be reliably formed without causing eccentricity or the like of the core 31 due to pressure.
【００３１】次に、成形された円筒体（以下、成形物と
いう）を脱型するが、この場合図３に示されているよう
に、まず上記シリンダー５を作動させて上記第２可動金
型３と第１可動金型２とを分離し、成形物８を第１可動
金型内２に保持した状態で該成形物８内から第２可動金
型３に設けられた円柱状のコア３１を抜き取り、次いで
図４に示されているように、シリンダー５を作動させて
第１可動金型２を固定金型１から分離して、成形物８を
固定金型１に保持した状態で該成形物８を第１可動金型
２のキャビティー２１内から抜き取り、更に図５に示さ
れているように、固定金型１側からの突き出し（図示せ
ず）により、スプルー１１，ランナー４１及びゲート４
内の樹脂硬化物８１ごと円筒状の成形物８を固定金型１
から外し、円筒状の形成物８を金型から脱型する。そし
て、最後にスプルー１１，ランナー４１及びゲート４部
分８１を除去して円筒体が得られるものである。Next, the molded cylinder (hereinafter, referred to as molded product) is released from the mold. In this case, as shown in FIG. 3, first, the cylinder 5 is operated to activate the second movable mold. 3 is separated from the first movable mold 2, and a cylindrical core 31 provided on the second movable mold 3 from inside the molded article 8 while the molded article 8 is held in the first movable mold 2. Then, as shown in FIG. 4, the cylinder 5 is operated to separate the first movable mold 2 from the fixed mold 1, and the molded product 8 is held in the fixed mold 1. The molded product 8 is extracted from the cavity 21 of the first movable mold 2, and is further protruded from the fixed mold 1 side (not shown) as shown in FIG. Gate 4
Fixing the cylindrical molded product 8 together with the cured resin 81 in the mold 1
, And the cylindrical formed article 8 is removed from the mold. Finally, the cylindrical body is obtained by removing the sprue 11, the runner 41 and the gate 4 portion 81.
【００３２】このように、この３分割の金型によれば、
成形物８が硬化した後に該成形物８を第１可動金型２に
安定的に保持した状態で該成形物８の内空部を形成する
第２可動金型３のコア３１を抜くことができるので、細
径薄肉の円筒体であっても歪みや変形を生じることな
く、確実に脱型することができ、より確実に寸法精度の
優れた円筒体を得ることができるものである。Thus, according to the three-part mold,
After the molded article 8 is cured, the core 31 of the second movable mold 3 forming the inner space of the molded article 8 may be pulled out while the molded article 8 is stably held in the first movable mold 2. Therefore, even if the cylinder has a small diameter and a small thickness, the cylinder can be reliably removed from the cylinder without distortion or deformation, and a cylinder having excellent dimensional accuracy can be obtained more reliably.
【００３３】なお、各分割型１，２，３を分離する際、
これら分割型１，２，３間に設けられた上記凹部と凸部
との嵌合状態は、各凹部の内周面に形成されたテーパー
面と各凸部の外周面に形成されたテーパー面との作用に
よりスムーズ解除することができ、また再び各分割型
１，２，３を接合する際もこのテーパー面の作用により
各凸部と各凹部とをスムーズに嵌合させることができる
ものである。また、得られた円筒体は、上記のように真
円度，同心度及び真直度等の寸法精度に優れるので、成
形後の研磨加工等の煩雑な仕上げ工程を省略又は簡略化
することができ、本発明の製造方法は、生産性にも優れ
るものである。When each of the split molds 1, 2, 3 is separated,
The fitting state of the concave portion and the convex portion provided between the split molds 1, 2, and 3 is determined by the tapered surface formed on the inner peripheral surface of each concave portion and the tapered surface formed on the outer peripheral surface of each convex portion. The function of this taper surface allows each convex part and each concave part to be smoothly fitted when the split molds 1, 2, 3 are joined again. is there. Further, the obtained cylindrical body is excellent in dimensional accuracy such as roundness, concentricity and straightness as described above, so that complicated finishing steps such as polishing after molding can be omitted or simplified. The production method of the present invention is also excellent in productivity.
【００３４】このように、本発明のＯＡ機器用円筒体の
製造方法によれば、寸法精度に優れる樹脂製の円筒体を
工数を増加させることなく生産性よく製造することがで
きるものである。As described above, according to the method for manufacturing a cylindrical body for OA equipment of the present invention, a cylindrical body made of resin having excellent dimensional accuracy can be manufactured with high productivity without increasing the number of steps.
【００３５】ここで、本発明の製造方法に用いられる成
形材料としては、射出成形可能な熱可塑性樹脂材料であ
ればいずれのものでもよく、製造する円筒体の用途等に
応じて適宜選定される。例えば、感光体の基体として円
筒体を得る場合には、特に制限されるものではないが、
ポリカーボネート（ＰＣ）、ポリエチレンテレフタレー
ト（ＰＥＴ）、ポリメタクリル酸メチル（ＰＭＭＡ）、
ポリアリレート（ＰＡＲ）、ポリフェニレンサルファイ
ド（ＰＰＳ）等が好適に用いられる。また、特開昭５８
−４４４４５号公報に記載されているような背面露光方
式の感光体に用いられる円筒状の基体を得る場合には、
透光性を有する材料が用いられるが、この場合にも上記
例示の材料を好適に使用することができる。Here, the molding material used in the production method of the present invention may be any injection-moldable thermoplastic resin material, and is appropriately selected according to the use of the cylindrical body to be produced. . For example, when a cylindrical body is obtained as a substrate of the photoreceptor, there is no particular limitation,
Polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA),
Polyarylate (PAR), polyphenylene sulfide (PPS) and the like are preferably used. Also, Japanese Patent Application Laid-Open
In the case of obtaining a cylindrical substrate used for a photoreceptor of a back exposure type as described in -44445,
A material having a light-transmitting property is used, and in this case, the above-described materials can be suitably used.
【００３６】また、上記射出成形を行う際の条件は、用
いる樹脂材料や目的とする円筒体の径，長さ，肉厚等に
応じて適宜選定され、特に制限されるものではないが、
例えば樹脂材料として、前掲のＰＣ等を用いる場合に
は、樹脂温度２６０〜３２０℃程度、特に２８０〜３１
０℃程度、射出圧力６００〜１５００ｋｇｆ／ｃｍ2程
度、特に１０００〜１２００ｋｇｆ／ｃｍ2程度、充填
時間０．５〜６ｓｅｃ程度、特に０．５〜２ｓｅｃ程度
とすることができる。The conditions for performing the above-mentioned injection molding are appropriately selected according to the resin material to be used and the diameter, length, thickness and the like of the target cylindrical body, and are not particularly limited.
For example, when the above-mentioned PC or the like is used as the resin material, the resin temperature is about 260 to 320 ° C., particularly 280 to 31 ° C.
The temperature can be about 0 ° C., the injection pressure can be about 600 to 1500 kgf / cm 2 , especially about 1000 to 1200 kgf / cm 2 , and the filling time can be about 0.5 to 6 sec, especially about 0.5 to 2 sec.
【００３７】ここで、本発明の製造方法により得られた
円筒体は、ＯＡ機器に用いられる感光体（感光ドラ
ム）、その他の各種ドラムやローラとして、又はその基
体として用いられるものであり、その用途に応じて得ら
れた円筒体の表面に公知の方法及び材料を用いて感光
層、導電層、弾性層、保護皮膜層等の機能層を積層する
ことができる。Here, the cylindrical body obtained by the production method of the present invention is used as a photosensitive member (photosensitive drum) used in OA equipment, other various drums and rollers, or as a base thereof. Functional layers such as a photosensitive layer, a conductive layer, an elastic layer, and a protective film layer can be laminated on the surface of the cylindrical body obtained according to the application by using a known method and material.
【００３８】一例として、上述した背面露光方式の感光
ドラムを得る場合について説明すると、背面露光方式の
感光ドラムを得る場合には、本発明の製造方法により得
られた透明（透光性）の円筒状基体上に、通常は、透光
性導電層を積層し、更にこの上に光導電層が形成され
る。As an example, the case of obtaining the above-described photosensitive drum of the back exposure system will be described. In the case of obtaining the photosensitive drum of the back exposure system, the transparent (translucent) cylinder obtained by the manufacturing method of the present invention is used. Usually, a light-transmitting conductive layer is laminated on the substrate, and a photoconductive layer is further formed thereon.
【００３９】上記透光性導電層を形成する材料として
は、酸化インジウム錫、酸化錫、酸化亜鉛等の微粒子が
好適に用いられ、これらを用いて真空蒸着、スパッタリ
ング、化学蒸着法（ＣＶＤ）、イオンプレーティング等
により透光性導電層を形成することができる。As the material for forming the light-transmitting conductive layer, fine particles such as indium tin oxide, tin oxide, and zinc oxide are preferably used, and these are used for vacuum deposition, sputtering, chemical vapor deposition (CVD), and the like. The light-transmitting conductive layer can be formed by ion plating or the like.
【００４０】また、上記光導電層としては、キャリヤ発
生層とキャリヤ輸送層との積層構造からなる機能分離型
積層光導電層と、単層からなる光導電層とがある。機能
分離型積層光導電層を形成する際に上記キャリヤ発生層
として用いられるキャリヤ発生材料としては、フタロシ
アニン系顔料，アゾ系顔料，多環キノン系顔料，ペリレ
ン系顔料，キナクリドン系顔料，アンダントロン系顔料
等の有機顔料、酸化亜鉛，酸化チタン，酸化カドミウ
ム，セレン，ヒ素セレン，セレンテルル，シリコン，ア
モルファスシリコン等の無機材料などが例示される。ま
た、キャリヤ輸送層として用いられるキャリヤ輸送材料
としては、ヒドラゾン、ブタジエン誘導体、ポリビニル
カルバゾール、ピラゾリン、オキサジアゾール、オキサ
ゾール、トリフェニルメタン、アミノ誘導体、フルオレ
ノン誘導体、ジフェノキノン誘導体などが例示される。The photoconductive layer includes a function-separated laminated photoconductive layer having a laminated structure of a carrier generating layer and a carrier transporting layer, and a photoconductive layer formed of a single layer. The carrier generating material used as the carrier generating layer when forming the function-separated layered photoconductive layer includes phthalocyanine pigments, azo pigments, polycyclic quinone pigments, perylene pigments, quinacridone pigments, andanthrone pigments And organic materials such as zinc oxide, titanium oxide, cadmium oxide, selenium, arsenic selenium, selentellurium, silicon, and amorphous silicon. Examples of the carrier transporting material used for the carrier transporting layer include hydrazone, butadiene derivative, polyvinylcarbazole, pyrazoline, oxadiazole, oxazole, triphenylmethane, amino derivative, fluorenone derivative, diphenoquinone derivative, and the like.
【００４１】これらキャリヤ発生層及びキャリヤ輸送層
は、公知の方法により円筒状基体上に形成することがで
きる。具体的には、上記有機顔料からなるキャリヤ発生
層は、真空蒸着、スパッタリング、化学蒸着法（ＣＶ
Ｄ）、イオンプーティングなどにより形成することがで
き、また有機材料からなるキャリヤ発生層及びキャリヤ
輸送層は、有機材料をバインダー樹脂中に分散させてロ
ールコーター法、ディッピング法、スプレー法、ブレー
ドコーティング法などにより塗布することにより形成す
ることもできる。この場合、バインダー樹脂としては、
ポリカーボネート、ポリスチレン、ポリ塩化ビニル、ポ
リメタクリレート、ポリビニルアセテート、シリコーン
樹脂、塩化ビニル−酢酸ビニル共重合体、エポキシ樹
脂、ポリビニルブチラール、ポリエステル樹脂、ポリア
ミド樹脂等が例示され、またこれらバインダーを溶解す
る溶剤としては、トルエン、メチルエチルケトン、ジク
ロロメタン、ジクロロエタン、クロルベンゼン、酢酸エ
チル、メチルアルコール、エチルアルコール等を使用す
ることができる。These carrier generation layer and carrier transport layer can be formed on a cylindrical substrate by a known method. Specifically, the carrier generation layer made of the organic pigment is formed by vacuum evaporation, sputtering, or chemical vapor deposition (CV).
D), can be formed by ion plating, etc., and the carrier generating layer and carrier transporting layer made of an organic material can be formed by dispersing an organic material in a binder resin, a roll coater method, a dipping method, a spray method, a blade coating method. It can also be formed by applying by a method or the like. In this case, as the binder resin,
Examples of polycarbonate, polystyrene, polyvinyl chloride, polymethacrylate, polyvinyl acetate, silicone resin, vinyl chloride-vinyl acetate copolymer, epoxy resin, polyvinyl butyral, polyester resin, polyamide resin, etc., and also as a solvent for dissolving these binders For example, toluene, methyl ethyl ketone, dichloromethane, dichloroethane, chlorobenzene, ethyl acetate, methyl alcohol, ethyl alcohol and the like can be used.
【００４２】また、単層の光導電層は、上記有機キャリ
ヤ発生材料をバインダー樹脂中に分散したもの、或いは
これに上記キャリヤ輸送材料を適宜添加したものをロー
ルコーター法、ディッピング法、スプレー法、ブレード
コーティング法などにより塗布することにより形成する
こともできる。なお、光導電層は通常０．５〜３０μｍ
程度の層厚とされる。The single photoconductive layer may be formed by dispersing the organic carrier-generating material in a binder resin or adding the carrier-transporting material to the binder resin as appropriate, using a roll coater method, a dipping method, a spray method, or the like. It can also be formed by applying by a blade coating method or the like. The photoconductive layer is usually 0.5 to 30 μm.
Layer thickness.
【００４３】更に、この感光体には、厚さ０．０１〜１
０μｍ程度のバリアー層を上記透光性導電層と光導電層
との間に形成することもできる。このバリアー層を形成
する材料としては、カゼイン、ポリビニルアルコール、
ポリビニルブチラール、ポリアミド樹脂、ポリエステル
樹脂、セルロース誘導体などが挙げられ、これらを塗布
することによりバリアー層を形成することができる。ま
た、感光体には帯電防止層を形成することもできる。帯
電防止層は、上記光導電層を形成する際にその塗料に帯
電防止剤を添加する方法、水又は溶剤に帯電防止剤を溶
解してこれを光導電層上に塗布する方法、バインダーと
帯電防止剤とを溶剤に溶解してこれを光導電層上に塗布
する方法、及び帯電防止剤を含有させた表皮層を表面に
形成する方法などにより形成することができる。Further, this photoreceptor has a thickness of 0.01 to 1
A barrier layer of about 0 μm can be formed between the light-transmitting conductive layer and the photoconductive layer. Materials for forming the barrier layer include casein, polyvinyl alcohol,
Examples thereof include polyvinyl butyral, a polyamide resin, a polyester resin, and a cellulose derivative, and a barrier layer can be formed by applying these. Further, an antistatic layer can be formed on the photoreceptor. The antistatic layer is formed by adding an antistatic agent to the coating when forming the photoconductive layer, dissolving the antistatic agent in water or a solvent and applying the solution on the photoconductive layer, It can be formed by dissolving an inhibitor in a solvent and applying it on the photoconductive layer, or by forming a skin layer containing an antistatic agent on the surface.
【００４４】［実験例］次に、上記図１〜５に示した金
型を用い、上述の方法に従ってＯＡ機器用円筒体を成形
し、寸法精度及び表面平滑性について評価した。この場
合、比較として押し出し成形法により得られた市販のア
クリルパイプ及びポリカーボネートパイプについても同
様に寸法精度及び表面平滑性評価した。結果を表１に示
す。[Experimental Example] Next, using the molds shown in FIGS. 1 to 5, cylindrical bodies for OA equipment were molded in accordance with the above-described method, and dimensional accuracy and surface smoothness were evaluated. In this case, the dimensional accuracy and surface smoothness of a commercially available acrylic pipe and polycarbonate pipe obtained by the extrusion molding method were similarly evaluated for comparison. Table 1 shows the results.
【００４５】実施例１及び２の本発明品は、表１に示し
た材料を用い、同表に示した条件で実施例１，２の２種
類の円筒体（長さ２００ｍｍ、径３０ｍｍ、肉厚２ｍ
ｍ）を成形した。また評価項目は下記の通りである。評価項目 真直度：外周部において、軸芯と平行な長手方向の直線
部分の凹凸量を測定した。 真円度：最大径部分における半径と最小径部分における
半径との差を測定した。 同心度：外径と内径との芯のズレを測定した。 平滑度：外面側と内面側について長手方向の表面粗さを
測定し、中心線平均粗さ（Ｒａ）と最大高さ（Ｒｍａ
ｘ）とを求めた。 なお、真直度、真円度、同心度は、接触式三次元測定機
（（株）東京精密製、三次元測定機ザイザックスＶＡ６
００Ｇ）で測定した。平滑度は、表面粗さ測定機
（（株）東京精密製、サーフコム）で測定した。The products of the present invention of Examples 1 and 2 were prepared using the materials shown in Table 1 and the two types of cylinders of Example 1 and 2 (length 200 mm, diameter 30 mm, wall thickness) under the conditions shown in the table. 2m thick
m) was molded. The evaluation items are as follows. Evaluation item Straightness: In the outer peripheral portion, the unevenness amount of a linear portion in the longitudinal direction parallel to the axis was measured. Roundness: The difference between the radius at the maximum diameter portion and the radius at the minimum diameter portion was measured. Concentricity: The deviation of the core between the outer diameter and the inner diameter was measured. Smoothness: The surface roughness in the longitudinal direction was measured on the outer surface side and the inner surface side, and the center line average roughness (Ra) and the maximum height (Rma) were measured.
x). The straightness, roundness, and concentricity are measured using a contact-type three-dimensional measuring device (manufactured by Tokyo Seimitsu Co., Ltd., XYZAX VA6, a three-dimensional measuring device).
00G). The smoothness was measured by a surface roughness measuring device (Surfcom, manufactured by Tokyo Seimitsu Co., Ltd.).
【００４６】[0046]
【表１】 [Table 1]
【００４７】表１に示されているように、本発明の製造
方法により得られた円筒体は、芯円度、同心度及び真直
度に優れ、本発明の製造方法によれば、優れた寸法精度
を有する円筒体が得られることが確認された。As shown in Table 1, the cylindrical body obtained by the manufacturing method of the present invention is excellent in the concentricity, concentricity and straightness, and according to the manufacturing method of the present invention, the dimensions are excellent. It was confirmed that a cylindrical body having accuracy was obtained.
【００４８】なお、本発明の製造方法に用いられる金型
は、上述の図１〜５に示したものに限定されるものでは
なく、例えば図１〜５の金型ではフィルムゲート４を成
形用キャビティー６の外周側に設けたが、フィルムゲー
ト４は成形用キャビティー６の内周側に設けても差し支
えない。また、図１〜５の金型は３分割のものである
が、可能であれば２分割でも更に４分割以上のものであ
ってもよい。更に、各分割型に設けた凹部や凸部は、場
合によっては省略することもでき、その他の構成につい
ても本発明の要旨を逸脱しない限り、適宜変更して差し
支えない。The mold used in the manufacturing method of the present invention is not limited to the one shown in FIGS. 1 to 5 described above. For example, the mold shown in FIGS. Although provided on the outer peripheral side of the cavity 6, the film gate 4 may be provided on the inner peripheral side of the molding cavity 6. Although the mold shown in FIGS. 1 to 5 is divided into three, the mold may be divided into two or four or more if possible. Further, the concave portions and the convex portions provided in each of the split molds may be omitted in some cases, and other configurations may be appropriately changed without departing from the gist of the present invention.
【００４９】[0049]
【発明の効果】以上説明したように、本発明のＯＡ機器
用円筒体の製造方法によれば、寸法精度に優れる樹脂製
の円筒体を工数を増加させることなく生産性よく製造す
ることができるものである。As described above, according to the method for manufacturing a cylinder for OA equipment of the present invention, a resin cylinder excellent in dimensional accuracy can be manufactured with high productivity without increasing the number of steps. Things.
【図１】本発明の製造方法に用いられる金型の一例を示
す概略断面図である。FIG. 1 is a schematic cross-sectional view showing an example of a mold used in the manufacturing method of the present invention.
【図２】同金型に成形樹脂を充填した状態を示す概略断
面図である。FIG. 2 is a schematic cross-sectional view showing a state in which the mold is filled with a molding resin.
【図３】同金型から成形した円筒体を脱型する場合の第
１の動作を示す概略断面図である。FIG. 3 is a schematic sectional view showing a first operation when a cylindrical body molded from the same mold is released.
【図４】同金型から成形した円筒体を脱型する場合の第
２の動作を示す概略断面図である。FIG. 4 is a schematic cross-sectional view showing a second operation when a cylindrical body molded from the same mold is released.
【図５】同金型から成形した円筒体を脱型する場合の第
３の動作を示す概略断面図である。FIG. 5 is a schematic cross-sectional view showing a third operation when a cylindrical body molded from the same mold is released.
１ 固定金型 １１ スプルー １２ 大径凹部 １３ 小径凹部 ２ 第１可動金型 ２１ 第１可動金型のキャビティー ２２ 凸部 ２３ 凸部 ３ 第２可動金型 ３１ コア ３２ 凹部 ３３ 凸部 ４ フィルムゲート ４１ ランナー ５ シリンダー ６ 成形用キャビティー ７ 熱可塑性樹脂 ８ 円筒体 ｐ１ パーティングライン ｐ２ パーティングライン REFERENCE SIGNS LIST 1 fixed mold 11 sprue 12 large diameter recess 13 small diameter recess 2 first movable mold 21 cavity of first movable mold 22 convex 23 convex 3 second movable mold 31 core 32 concave 33 convex 4 film gate 41 runner 5 cylinder 6 molding cavity 7 thermoplastic resin 8 cylindrical body p1 parting line p2 parting line
Claims (5)
熱可塑性樹脂を射出注入して樹脂製円筒体を成形する円
筒体の製造方法において、上記円筒状キャビティーの片
端部に該キャビティーを周方向に沿って１周するフィル
ムゲートを形成し、該フィルムゲートを通してキャビテ
ィー内に上記熱可塑性樹脂を射出注入することを特徴と
するＯＡ機器用円筒体の製造方法。1. A method for manufacturing a cylindrical body, comprising molding a resin cylindrical body by injecting a thermoplastic resin into a mold having a cylindrical cavity, wherein the cavity is provided at one end of the cylindrical cavity. Forming a film gate which makes one round in the circumferential direction, and injecting and injecting the thermoplastic resin into the cavity through the film gate.
た円柱状のキャビティーを有する第１可動金型と、円柱
状のコアを有する第２可動金型とからなり、上記固定金
型に上記第１可動金型の一端面を接合し、かつ該第１可
動金型の他端面に上記第２可動金型を接合して、該第２
可動金型のコアを第１可動金型のキャビティー内に挿入
し、第１可動金型のキャビティー内周面と上記コア外周
面との間に円筒状のキャビティーを形成すると共に、上
記固定金型と第１可動金型とのパーティング面に上記円
筒状キャビティーを周方向に沿って１周するフィルムゲ
ートを形成するものである請求項１記載のＯＡ機器用円
筒体の製造方法。2. The method according to claim 1, wherein the mold comprises a fixed mold, a first movable mold having a cylindrical cavity with both ends open, and a second movable mold having a cylindrical core. One end surface of the first movable mold is joined to a mold, and the second movable mold is joined to the other end surface of the first movable mold.
The core of the movable mold is inserted into the cavity of the first movable mold, and a cylindrical cavity is formed between the inner peripheral surface of the cavity of the first movable mold and the outer peripheral surface of the core. 2. The method for manufacturing a cylindrical body for OA equipment according to claim 1, wherein a film gate is formed on a parting surface of the fixed mold and the first movable mold so as to make a round around the cylindrical cavity along a circumferential direction. .
グ面、第１可動金型と第２可動金型とのパーティング
面、及び固定金型と第２可動金型のコア先端とのパーテ
ィング面に、それぞれ凸部と凹部とを設けて互いに嵌合
させることにより各金型間を位置決めして接合すると共
に、各凸部の外周面と各凹部の内周面とをテーパー面と
して各金型間の接合，分離を容易ならしめるようにした
請求項２記載のＯＡ機器用円筒体の製造方法。3. A parting surface between the fixed mold and the first movable mold, a parting surface between the first movable mold and the second movable mold, and a core tip of the fixed mold and the second movable mold. The convex part and the concave part are provided on the parting surface of the mold, and the molds are positioned and joined by fitting each other, and the outer peripheral surface of each convex part and the inner peripheral surface of each concave part are tapered. 3. The method for manufacturing a cylindrical body for OA equipment according to claim 2, wherein the surfaces facilitate the joining and separation between the molds.
円筒状基体である請求項１〜３のいずれか１項に記載の
ＯＡ機器用円筒体の製造方法。4. The method for producing a cylinder for OA equipment according to claim 1, wherein the cylinder for OA equipment to be produced is a cylindrical base for a photoreceptor.
円筒状基体又はローラ自体である請求項１〜３のいずれ
か１項に記載のＯＡ機器用円筒体の製造方法。5. The method for producing a cylinder for OA equipment according to claim 1, wherein the cylinder for OA equipment to be produced is a cylindrical base for a roller or the roller itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9040165A JPH10217291A (en) | 1997-02-07 | 1997-02-07 | Manufacture of cylindrical body for office automation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9040165A JPH10217291A (en) | 1997-02-07 | 1997-02-07 | Manufacture of cylindrical body for office automation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10217291A true JPH10217291A (en) | 1998-08-18 |
Family
ID=12573161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9040165A Pending JPH10217291A (en) | 1997-02-07 | 1997-02-07 | Manufacture of cylindrical body for office automation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10217291A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1113047A1 (en) * | 1999-12-27 | 2001-07-04 | Bridgestone Corporation | Mixed resin compound, resin pipe, production of resin pipe, and photosensitive drum |
| FR2817793A1 (en) * | 2000-12-12 | 2002-06-14 | Eurotube | Mould for injecting plastic packaging tube blank has body with recess adjoining main cavity to receive centering peg on mobile core |
| JP2002200651A (en) * | 2001-01-09 | 2002-07-16 | Sanko Co Ltd | Mold structure for pallet made of synthetic resin |
| JP2010089347A (en) * | 2008-10-07 | 2010-04-22 | Mitsubishi Cable Ind Ltd | Resin roller |
| EP2206594A1 (en) * | 2007-10-05 | 2010-07-14 | NGK Insulators, Ltd. | Shaping mold and method of shaping |
| JP2010253856A (en) * | 2009-04-27 | 2010-11-11 | Ckd Corp | Method for manufacturing cylindrical part, and mold for manufacturing cylindrical part |
| FR2957839A1 (en) * | 2010-03-25 | 2011-09-30 | Valois Sas | PROCESS FOR INJECTION MOLDING A HOLLOW PIECE OF PLASTIC MATERIAL. |
-
1997
- 1997-02-07 JP JP9040165A patent/JPH10217291A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1113047A1 (en) * | 1999-12-27 | 2001-07-04 | Bridgestone Corporation | Mixed resin compound, resin pipe, production of resin pipe, and photosensitive drum |
| EP1229080A2 (en) * | 1999-12-27 | 2002-08-07 | Bridgestone Corporation | Mixed resin compound, resin pipe, production of resin pipe, and photosensitive drum |
| EP1229080A3 (en) * | 1999-12-27 | 2002-12-18 | Bridgestone Corporation | Mixed resin compound, resin pipe, production of resin pipe, and photosensitive drum |
| FR2817793A1 (en) * | 2000-12-12 | 2002-06-14 | Eurotube | Mould for injecting plastic packaging tube blank has body with recess adjoining main cavity to receive centering peg on mobile core |
| JP2002200651A (en) * | 2001-01-09 | 2002-07-16 | Sanko Co Ltd | Mold structure for pallet made of synthetic resin |
| EP2206594A1 (en) * | 2007-10-05 | 2010-07-14 | NGK Insulators, Ltd. | Shaping mold and method of shaping |
| EP2206594A4 (en) * | 2007-10-05 | 2014-02-19 | Ngk Insulators Ltd | Shaping mold and method of shaping |
| JP2010089347A (en) * | 2008-10-07 | 2010-04-22 | Mitsubishi Cable Ind Ltd | Resin roller |
| JP2010253856A (en) * | 2009-04-27 | 2010-11-11 | Ckd Corp | Method for manufacturing cylindrical part, and mold for manufacturing cylindrical part |
| FR2957839A1 (en) * | 2010-03-25 | 2011-09-30 | Valois Sas | PROCESS FOR INJECTION MOLDING A HOLLOW PIECE OF PLASTIC MATERIAL. |
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