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WO1987001329A1 - Dispositif et procede de moulage a deux materiaux - Google Patents

Dispositif et procede de moulage a deux materiaux

Info

Publication number
WO1987001329A1
WO1987001329A1 PCT/US1986/001694 US8601694W WO8701329A1 WO 1987001329 A1 WO1987001329 A1 WO 1987001329A1 US 8601694 W US8601694 W US 8601694W WO 8701329 A1 WO8701329 A1 WO 8701329A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
injection molding
recited
cavity
components
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.)
Ceased
Application number
PCT/US1986/001694
Other languages
English (en)
Inventor
Steven R. Dapolito
Raymond Brausam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baxter International Inc
Original Assignee
Baxter Travenol Laboratories Inc
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 Baxter Travenol Laboratories Inc filed Critical Baxter Travenol Laboratories Inc
Priority to JP61504456A priority Critical patent/JPH0684029B2/ja
Publication of WO1987001329A1 publication Critical patent/WO1987001329A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
    • 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
    • B29C45/16—Making multilayered or multicoloured 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
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1601—Making multilayered or multicoloured articles the injected materials not being adhered or bonded to each other
    • 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
    • B29C45/2756—Cold runner channels

Definitions

  • the subject invention generally relates to injection molding methods and devices formed thereby and more specifically relates to two-material, two-component devices formed by injection molding in which a first component acts as a part of the mold to produce a second component.
  • An advantage of using the outer layer of the neck as part of the mold for the inner layer is that no deviation occurs between the outer and inner layers of the neck of bottle.
  • One feature of the device and method as taught by the Aoki reference is that the outer and inner layers of the neck of the bottle are not separable from one another after they have been formed.
  • a method of injection molding a two-component part includes the steps of: first, injection molding a first component in one cavity of a multicavity mold utilizing a dual-injection unit molding machine; second, mechanically transferring a transport plate containing the first component, to a second cavity in the machine; and third, injection molding a second component over the first component in the second cavity wherein the first component, a core, and the second cavity together act as a mold to produce the second component during the injection molding of the second component.
  • the first and second components are manually separable from each other after the second component has been molded.
  • FIG.l illustrates a cross-section of a mold in accordance with the subject invention in the closed position
  • FIG.2 is a cross-section of a two-material mold in the open position to be run in a dual injection unit molding machine illustrating the preferred embodiment of the subject invention
  • FlG.3 is a side view of a device manufactured in ac- cordance with the subject invention.
  • FIG. 1 illustrates a two-material injection mold 10 designed in accordance with the subject invention.
  • the mold consists of a pair of support plates 12 that are used to sup- port the core retainer plate 14 and the cavity retainer plate 20.
  • the core retainer plate 14 contains core inserts 16 and 18, sucker pin 40, sucker well bushing 44, and two leader pins 38 located 180 degrees apart.
  • a transfer plate 19 is attached to a shaft that is contained in the support plate 12 on the core half of the mold. Transfer plate 19 contains cavity inserts 30 and 32, two leader pin bushings 34 located 180 degrees apart, and a sucker well bushing 44.
  • .Cavity re ⁇ tainer plate 2U contains cavity inserts 22 and 24, runners 26 and 28, and two leader pin bushings 42 located 180 degrees apart.
  • FIG. 2 illustrates the same mold illustrated in FIG. 1 in the open position depicting the first molded plastic component 46 and the second (finished) molded plastic component 48 sitting in cavity inserts 30 and 32 respectively. Also shown in FIG. 2 are molded runners 50 and 52 after they have been removed from the cavity retainer plate 20.
  • the mold components used in FIG. 2 refer to the same mold components illustrated in FIG. 1. The method of the subject invention will now be described using the mold illustrated in FIGS. 1 and 2.
  • a method of injection molding a two-component part which in ⁇ cludes a first step of injection molding a first component 46 in a first cavity 22 of multicavity mold 10. This injection molding step is performed when the mold is in the closed position as illustrated in FIG.l. A first material is injected through runner 26 to till cavity 22 during the first step.
  • the mold is then opened by a hydraulic system (not shown) that is provided in a conventional injection molding machine.
  • the hydraulic system causes the transfer plate 19 to be forced away from core retainer plate 14 to cause component b to be separated from core 16.
  • the transfer plate is then rotated to cause component 46 to be positioned in alignment with core 18.
  • the injection mold is then closed using leader -6-
  • first component and the second cavity together act as a portion of the mold to form the second component.
  • the hydraulic system again opens the mold and a knock-off device (not shown) knocks the completed two-component part out of the mold.
  • the first and second components will remain bonded together until the second component is removed from the first. It is possible to main ⁇ tain the first and second components in a fixed, yet separable, relationship with one another in accordance with the subject invention due to the materials chosen Tor each molding step. The choice of materials is a key feature of the subject in ⁇ vention. In order for the first component to act as a portion of the mold for the second component yet produce a two-component device in which the components are separable from one another, it is necessary to use "semi-compatible" materials.
  • the term "semi-compatible" means that only weak molecular bonds are formed between the two materials when one material is molded over the other. Such a weak molecular bond will allow components manufactured using semi-compatible materials, in accordance with the subject in ⁇ vention and to be maintainable in a fixed position relative to one another until force is used to separate the two components.
  • the subject invention includes the provision that a second component will be weakly bonded to a first component after injection molding of the second component over the first component. These weak bonds are used to maintain the second component in a fixed relation to the first component until forcefully separated. In the preferred embodiment, a force of 1.0 to 15.0 pounds is needed to separate the second component from the first.
  • the two materials chosen are such that the material used for the second component has a lower melting point than the material used for the first component.
  • the need for the second material having a lower melting point than the first material has been recognized in the past as discussed above in the Background of the Invention.
  • the need to use "semi-compatible" materials to form the weak molecular bonds as taught by the subject invention is considered to be unique.
  • a variety of materials may be chosen to form each of the first and second components and in some instances it may be desirable to add a slip agent to the base material chosen to enhance separability of the components after manufacture.
  • Some materials that have been found to be useful for forming the first component include acrylonitrile butadiene styrene (ABS) and nylon 6,6.
  • ABS acrylonitrile butadiene styrene
  • nylon 6,6 nylon 6,6
  • Other materials may be used provided that they have a high melting point relative to the material used for the second component, semi-compatibility with the second material and capable ot being injection molded.
  • Materials that have been found to be useful in forming the second component in ac ⁇ cordance with the subject invention include low density
  • a slip agent may be added to the material used to form either the first or second component.
  • Useful slip agents include N,N ethylene bis stearamide, erucyl -8-
  • amide powder, and oleamide of alaic acid The percentage of slip agent added to the material used to fabricate each component will affect the force required to separate the first and second components from each other after manufacture. In general, a higher concentration of slip agent will decrease the force required to separate the two components. It has been shown that a slip agent concentration of 0.5 to 1.5% will give an acceptable removal force for the application specified. In the preferred embodiment, 0.5% oleamide of alaic acid is used as the slip agent. If high concentrations of slip agent are used in the materials used to form the components during manu ⁇ facture, the components could actually separate spontaneously after manufacture. This may be desirable in some applications but highly undesirable in others.
  • a needle adapter consists of a male luer at one end of the adapter and a tubing interface opposite the male luer.
  • the luer portion of the needle adapter is typically covered with a tip protector after manufacture to maintain sterility of the luer and the fluid path of the administration set until it is desired to be used.
  • Needle adapters and tip protectors manufactured in the past using conventional techniques have been produced on separate machines. Each tip protector is then manually placed on a needle adapter to form an unsterile assembly.
  • One problem en ⁇ countered with assemblies manufactured using conventional techniques is that the fit between the needle adapter and tip protector is not as consistent as desired.
  • the subject in ⁇ vention eliminates this problem by molding the tip protector directly onto the needle adapter. In order to more fully com ⁇ prehend the details of the subject invention-; an example is provided below illustrating the use of the subject invention to manufacture tip protectors and needle adapters.
  • Cyclolac CTB is dried at 18U degrees Fahrenheit for four hours to remove moisture from the material. The dried material is then introduced into the barrel of injection unit number one of a two injection unit molding machine. The Cyclolac CTB is plasticated at approximately 430 degrees Fahrenheit and then injected into a first cavity ,22, FIG. 2 with an injection pressure of approximately 500 pounds per square inch. The molded needle adapter 46 is allowed to cool in the cavity long enough for the plastic to solidify. The mold then opens, a transfer plate 19 is mechanically moved clear of the leader pins 38 and rotated 180 degrees, thus positioning the needle adapter 46 in line with cavity 24. Sub ⁇ sequently the mold closes.
  • Low density polyethylene containing 0.5 percent oleamide of alaic acid additive as a slip agent is plasticated at 305 degrees Fahrenheit and then injected into cavity 24 with an injection pressure of approximately 300 pounds per square inch thus, forming a tip protector over the needle adapter.
  • the tip protector is cooled in the mold long enough to allow for the finished piece part to be ejected from the mold without distortion.
  • the mold opens, the finished part is ejected, and the above process is then repeated.

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)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Le procédé de moulage à double injection ci-décrit permet de produire des dispositifs à deux composants, à deux matériaux (46, 48). Le procédé consiste premièrement à mouler par injection un premier composant (46) dans un poste (22) d'une machine de moulage (10) à double unité d'injection. Le premier composant (46) est ensuite transféré vers un second poste (24) de la machine (10) et un second composant (48) est moulé par injection sur le premier composant (46) de sorte que le premier composant (46) joue le rôle d'une partie du moule (24) pour le second composant (48). Les deux composants peuvent être maintenus fixe l'un par rapport à l'autre jusqu'à ce qu'on les sépare manuellement. Une caractéristique de l'invention est la formation d'une barrière stérile entre le premier composant (46) et le second composant (48) en cours de fabrication.
PCT/US1986/001694 1985-08-28 1986-08-18 Dispositif et procede de moulage a deux materiaux Ceased WO1987001329A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61504456A JPH0684029B2 (ja) 1985-08-28 1986-08-18 二材料成形方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77082085A 1985-08-28 1985-08-28
US770,820 1985-08-28

Publications (1)

Publication Number Publication Date
WO1987001329A1 true WO1987001329A1 (fr) 1987-03-12

Family

ID=25089791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/001694 Ceased WO1987001329A1 (fr) 1985-08-28 1986-08-18 Dispositif et procede de moulage a deux materiaux

Country Status (4)

Country Link
EP (1) EP0233922A4 (fr)
JP (1) JPH0684029B2 (fr)
CA (1) CA1268914A (fr)
WO (1) WO1987001329A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618683A1 (fr) * 1987-07-31 1989-02-03 Aguettant Lab Procede de fabrication de pieces d'acces de recipients de liquides de perfusion
EP0504571A3 (en) * 1991-03-22 1992-12-23 G.B. Boucherie, N.V. Mould for injection moulding of multicomponent brush bodies
WO1993010849A1 (fr) * 1991-12-05 1993-06-10 Süddeutsche Feinmechanik GmbH Canule, notamment canule pour ponction vasculaire
FR2725152A1 (fr) * 1994-09-30 1996-04-05 Grosfilley Jean Pierre Base tournante universelle de moules pour la multi-injection des matieres plastiques
WO2000010629A1 (fr) * 1998-08-21 2000-03-02 Medrad, Inc. Ensemble raccord et tubulure utilises avec une seringue
WO2003015918A3 (fr) * 2001-08-16 2003-06-26 Weidmann Plastics Tech Ag Procede de fabrication d'une couverture de fermeture et couverture de fermeture ainsi fabriquee
ITVR20100191A1 (it) * 2010-10-05 2012-04-06 Borromini S R L Procedimento di stampaggio ad iniezione ed apparecchiatura per la realizzazione di detto procedimento

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6319236B1 (en) 1998-11-06 2001-11-20 Millipore Corporation Universal outlet for filter units
DE102013112823B3 (de) 2013-11-20 2015-03-26 Maschinenfabrik Reinhausen Gmbh Vorrichtung und Verfahren zur Detektion von Gas
CN116834226A (zh) * 2023-07-24 2023-10-03 深圳市默启文化科技有限公司 一种多重塑料成型的模具及工艺

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281295A (en) * 1964-08-25 1966-10-25 Capucio Eugene Method of capping
US3344942A (en) * 1966-04-05 1967-10-03 Hedgewick Peter Safety cap and container
US3776996A (en) * 1970-08-13 1973-12-04 Btr Industries Ltd Methods of providing end fittings on hoses
US3878282A (en) * 1971-08-10 1975-04-15 Ilikon Corp Process for molding multilayer articles
US4021524A (en) * 1975-08-15 1977-05-03 American Can Company Method of making a collapsible tube with an integral cap
US4280976A (en) * 1980-04-18 1981-07-28 Holdt J W Von Simultaneously molded threaded port and plug
US4371476A (en) * 1978-12-26 1983-02-01 Basf Wyandotte Corporation Mold release agents containing oxidation stable polyoxyalkylenes
US4482511A (en) * 1981-08-21 1984-11-13 Victor Company Of Japan, Ltd. Method of manufacturing a stamper for information storage discs
US4507258A (en) * 1982-08-31 1985-03-26 Katashi Aoki Method for injection molding a composite parison
US4551138A (en) * 1982-03-12 1985-11-05 Terumo Kabushiki Kaisha Cannula device and medical bag having the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB697255A (en) * 1951-04-25 1953-09-16 Ernest Verrinder Wagner Improvements in and relating to injection moulding and articles produced thereby
FR2015660A1 (en) * 1968-08-14 1970-04-30 Dave Chapman Goldsmith Manufacture by injection moulding of plastic articles - consisting of several parts
JPS519679B2 (fr) * 1972-09-14 1976-03-29
JPS51151753A (en) * 1975-06-20 1976-12-27 Matsushita Electric Industrial Co Ltd Method of producing resin product with slide
DE2547619A1 (de) * 1975-10-24 1977-04-28 Christian Dipl Phys Ortmann Injektionsspritze mit kanuele und schutzhuelle fuer die kanuele
JPS5854022B2 (ja) * 1976-08-07 1983-12-02 松下電器産業株式会社 摺動部を有する樹脂製品の製造方法
JPS6061222A (ja) * 1983-09-14 1985-04-09 Nissan Motor Co Ltd 射出成形装置
DE3340122A1 (de) * 1983-11-05 1985-05-23 Fickenscher & Co GmbH Werkzeug-und Formenbau, 8672 Selb Verfahren zum spritzgiessen von gegenstaenden aus kunststoff

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281295A (en) * 1964-08-25 1966-10-25 Capucio Eugene Method of capping
US3344942A (en) * 1966-04-05 1967-10-03 Hedgewick Peter Safety cap and container
US3776996A (en) * 1970-08-13 1973-12-04 Btr Industries Ltd Methods of providing end fittings on hoses
US3878282A (en) * 1971-08-10 1975-04-15 Ilikon Corp Process for molding multilayer articles
US4021524A (en) * 1975-08-15 1977-05-03 American Can Company Method of making a collapsible tube with an integral cap
US4371476A (en) * 1978-12-26 1983-02-01 Basf Wyandotte Corporation Mold release agents containing oxidation stable polyoxyalkylenes
US4280976A (en) * 1980-04-18 1981-07-28 Holdt J W Von Simultaneously molded threaded port and plug
US4482511A (en) * 1981-08-21 1984-11-13 Victor Company Of Japan, Ltd. Method of manufacturing a stamper for information storage discs
US4551138A (en) * 1982-03-12 1985-11-05 Terumo Kabushiki Kaisha Cannula device and medical bag having the same
US4507258A (en) * 1982-08-31 1985-03-26 Katashi Aoki Method for injection molding a composite parison

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
J. BORETOS, "Concise Guide to Biochemical Polymers", published 1973, by Charles C. Thomas Publisher Co. (Springfield, Illinois), see gage 142 and 143 *
See also references of EP0233922A4 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618683A1 (fr) * 1987-07-31 1989-02-03 Aguettant Lab Procede de fabrication de pieces d'acces de recipients de liquides de perfusion
EP0504571A3 (en) * 1991-03-22 1992-12-23 G.B. Boucherie, N.V. Mould for injection moulding of multicomponent brush bodies
US5256048A (en) * 1991-03-22 1993-10-26 G. B. Boucherie N.V. Tool for the multicomponent injection molding of brush bodies
WO1993010849A1 (fr) * 1991-12-05 1993-06-10 Süddeutsche Feinmechanik GmbH Canule, notamment canule pour ponction vasculaire
FR2725152A1 (fr) * 1994-09-30 1996-04-05 Grosfilley Jean Pierre Base tournante universelle de moules pour la multi-injection des matieres plastiques
WO2000010629A1 (fr) * 1998-08-21 2000-03-02 Medrad, Inc. Ensemble raccord et tubulure utilises avec une seringue
WO2003015918A3 (fr) * 2001-08-16 2003-06-26 Weidmann Plastics Tech Ag Procede de fabrication d'une couverture de fermeture et couverture de fermeture ainsi fabriquee
US8420189B2 (en) 2001-08-16 2013-04-16 Weidmann Plastics Technology Ag Method for the production of a sealing cover and sealing cover produced by said method
ITVR20100191A1 (it) * 2010-10-05 2012-04-06 Borromini S R L Procedimento di stampaggio ad iniezione ed apparecchiatura per la realizzazione di detto procedimento
WO2012046186A1 (fr) * 2010-10-05 2012-04-12 Borromini S.R.L. Procédé de moulage par injection et appareil pour la mise en œuvre dudit procédé

Also Published As

Publication number Publication date
EP0233922A1 (fr) 1987-09-02
EP0233922A4 (fr) 1987-10-26
JPS63500651A (ja) 1988-03-10
CA1268914A (fr) 1990-05-15
JPH0684029B2 (ja) 1994-10-26

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