WO2005018905A1 - Pieces moulees en plastique - Google Patents

Pieces moulees en plastique Download PDF

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Publication number
WO2005018905A1
WO2005018905A1 PCT/GB2004/003338 GB2004003338W WO2005018905A1 WO 2005018905 A1 WO2005018905 A1 WO 2005018905A1 GB 2004003338 W GB2004003338 W GB 2004003338W WO 2005018905 A1 WO2005018905 A1 WO 2005018905A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
plastics material
mould cavity
different
plastics
Prior art date
Application number
PCT/GB2004/003338
Other languages
English (en)
Inventor
Peter Reginald Clarke
David Peter Rickman
Original Assignee
Im-Pak Technologies Limited
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 Im-Pak Technologies Limited filed Critical Im-Pak Technologies Limited
Publication of WO2005018905A1 publication Critical patent/WO2005018905A1/fr

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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
    • B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
    • 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
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • B29C45/1646—Injecting parison-like 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1603—Multi-way nozzles specially adapted therefor
    • 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
    • B29C45/28—Closure devices therefor
    • B29C45/2806—Closure devices therefor consisting of needle valve systems
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7132—Bowls, Cups, Glasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the present invention relates to a method and apparatus for injection-compression moulding.
  • injection-compression moulding is used herein to refer to a method of moulding an article which comprises injecting a predetermined quantity of plastics material into a mould cavity before it is fully closed and subsequently closing the mould to reduce its cavity to its minimum volume. The closing of the mould, rather than the injection pressure, acts to force the plastics material to fill the mould cavity.
  • injection-compression moulding it is possible to achieve high flow length to thickness ratios, enabling thin-walled containers to be manufactured.
  • a method of injection-compression moulding to which the present invention is particularly applicable is described in more detail in WO02/058909, which is incorporated herein by reference.
  • plastics materials that are gas impervious such as nylon (polyamide) and EVOH (ethyl vinyl alcohol)
  • nylon polyamide
  • EVOH ethyl vinyl alcohol
  • a method of injection-compression moulding an article which method comprises : • introducing two or more different molten plastics materials into a mould cavity such that one of the plastics materials is contained within the other or another at the time of completion of injection, and • reducing the volume of the mould cavity after the molten plastics materials have been introduced therein to force the molten plastics materials to flow and fill the entire volume of the cavity, so as to form an article having a multi-layer wall structure.
  • the present invention proposes the use of injection- compression moulding to achieve a multi-layer wall structure in an article without starting from a flat laminated sheet while still ensuring the desired distribution of the different plastics materials in the mould article.
  • the invention makes use of the fact that if one of the plastics materials is contained within the other at the time of completion of injection into the mould cavity, then by suitable selection of the flow characteristics of the different plastics material, one can ensure that the layering of the plastics material is maintained in the finished article after the initially injected molten plastics materials have been compressed by the closing of the mould cavity.
  • the injection of the different plastics material into the mould cavity may be carried out sequentially or simultaneously and in either case it is possible to ensure that one of the plastics materials is sandwiched between layers of the other in the finished article. If injection of the different plastics materials is performed sequentially, then injection of the first material will form a bead. The outer surface cools down to form a skin while the interior of the bead remains hot. When the second plastics material is injected, its natural tendency is to follow the path of least resistance, that it to say it will flow into the hot centre of the bead. A third injection of the first material may then reseal the bead and encapsulate the second material within the first. The third injection may result from the action or re-setting the gate pin, as this will in itself push more material into the cavity.
  • the injection gate may have concentric passages through which the different plastics material flow simultaneously to produce a tube of the first plastics material filled with the second plastics material.
  • the injection gate may have concentric passages through which the different plastics material flow simultaneously to produce a tube of the first plastics material filled with the second plastics material.
  • the closing of the mould to minimise the volume of the cavity can be made to flatten the injected bead while preventing one of the materials from being exposed on the surfaces of the moulded article.
  • the moulded article may itself be the finished article or it could be a preform that it stretched to form the finished article.
  • the stretching may be performed by any one or more of the processes comprising mechanical stretching, blow moulding (application of air pressure to the interior of the article) and vacuum forming (application of a vacuum outside the article) .
  • the stretching can be performed on the same machine as used for injection-compression moulding while the preform is still hot, or else the preform can be allowed to cool for later transfer to a separate machine where it is stretched into a second, larger, mould cavity.
  • the laminated structure of the finished article is required to have only two different types of plastics material within it but this is not necessarily the case.
  • the barrier material and food grade plastics material do not naturally adhere well to one another and it may be necessary to provide a further material to bond the barrier material and the food grade material to one another. While it is clearly simpler to resort to sequential injection through a common gate when producing a structure composed of more than two plastics materials, such a structure can also be achieved in the present invention using simultaneous injection through concentric passages.
  • a machine for moulding an article which machine comprises : • a mould cavity defined between relatively movable mould parts, • two or more supplies of different plastics material, • a plurality of dosing cylinders each for metering a predetermined quantity of a respective plastics material to the mould cavity, • a plurality of passages connecting the dosing cylinders to the respective supplies of the different plastics materials, • a further plurality of passages connecting the dosing cylinders to an injection gate that opens into the mould cavity, and • valves for controlling the flow along the different passages to enable each dosing cylinder to be filled with a respective one of the plastics materials and to permit the charges of the plastics material stored in the different dosing cylinders to be injected subsequently into the mould cavity, and • means for fully closing the moulding cavity after completion of the injection therein of the different plastics materials to form an article having a multi-layer wall structure.
  • Figure 1 is a schematic representation of a multi- impression mould for implementing the invention
  • Figure 2 is a perspective view of one half of a single- impression mould
  • Figure 3 is a section through the injection gate of Figure 2
  • Figure 4 is a section similar to that of Figure 3 showing an alternative design of an injection gate.
  • FIG. 1 there is shown schematically a mould for implementing the invention.
  • the mould comprises a stationary mould part 10 having two recesses 12 and a movable mould part (not shown in full) having cores 14 that fit in the recesses to define cup-shaped mould cavities 16.
  • the mould comprises further parts that are not shown in the drawing but are described in detail in WO02/058909.
  • a pre-close plate is arranged between the part carrying the cores 14 and the stationary mould part 10 to seal off the mould cavities 16 before the parts of the mould come fully together.
  • a conically tapering sealing ring as described in co-pending GB Patent Application No. 0400936.1 may be used to contain the injected plastics material while allowing the volume of the cavity to be reduced.
  • the plastics material is injected into the mould cavities 16 after they have been sealed but before the parts of the mould have been brought together fully by the press of the mould machine.
  • the cores 14 are advanced further into the recesses 12 of the stationary mould part 10 to compress the injected plastics material and thereby force it to flow into all the regions of the mould cavity 16 in a manner analogous to the forging of metal.
  • Such injection-compression enables moulding of articles having a high length to thickness ratio.
  • the present invention provides an enhancement of injection-compression moulding, to allow the production of articles having a stratified multi-layer wall structure.
  • the mould of Figure 1 is connected to two injection screws 30 and 40 that supply under pressure two molten plastics materials having differing chemical and/or physical properties.
  • one of the plastics materials is safe for contacting food and the other is an oxygen impervious barrier material that is not suitable for making direct contact with food and drink but prolongs the shelf life of packaged foodstuffs.
  • Each mould cavity 16 is associated with two dosing cylinders 18, 20.
  • Each dosing cylinder has a reciprocating piston 19 of which the stroke is limited by an adjustable stop to preset the quantity of plastics material required to fill it.
  • the dosing cylinders 18 are connected through passages 22 to the injection screw 30 whereas the dosing cylinders 20 are connected through separate passages 24 to the injection screw 40.
  • Each of the passages 22 and 24 includes a spool valve 41 to shut-off the connection between each pair of dosing cylinders as well as the connection between each dosing cylinder and its associated injection screw.
  • the dosing cylinders 18 and 20 are further connected by way of passages 26 and 27, respectively, to the injection gates 28 through which the plastics materials are introduced into the mould cavities 16.
  • the injection gates embodiments of which are illustrated in Figures 3 and 4, are opened and closed by means of actuators 42.
  • valves 41 are opened and the injection gates 28 are closed.
  • the two different plastics materials flow from the screws 30 and 40 to the dosing cylinders 18, 20 until the pistons 19 of the dosing cylinders are forced back against their end stops.
  • the shut-off valves 41 are operated to isolate each dosing cylinder 18, 20.
  • the gates 28 are opened by means of the actuators 42 and the pistons 18 of the dosing cylinders 18 and 20 are advanced, by application of an external force, to inject a predetermined quantity of plastics material (corresponding to the displacement volume of the piston 19 during each stroke) into the associated cavity 16.
  • the pistons 19 of the dosing cylinders can be biased to offer resistance to the injected plastics material or their movement can be powered in both directions to maintain the desired pressure within the dosing cylinders at all times.
  • the first injected plastics material will form a bead and the plastics material injected subsequently will form a second bead lying within the first.
  • the two materials will flow within each other in a dissimilar manner, due to their different melt flows and compatibilities, and will result in the moulding of an article having a laminar composition with one plastics material sandwiched between two layers of the other.
  • a two-way valve may be provided for each dosing cylinder 18 controlled by the same actuator 42 as controls the injection gate 28.
  • the pin of the injection gate may be designed to act as a spool valve.
  • the injection gate 28 is modified in this case as it controls the flow to it from two different lines and its design will be described below in greater detail by reference to Figures 3 and 4.
  • FIG. 2 A three-dimensional view of the mould part 10 of Figure 1 for a single impression mould is shown in Figure 2. Like reference numerals are used to designate like parts.
  • the feed screw for one of the plastics materials is not shown in Figure 3 and is the conventional screw feeding into the back of the mould as viewed.
  • the second feed screw could also be positioned behind the mould but in Figure 2, the second feed screw is shown as being front mounted and as having its own feed hopper 44.
  • Figure 2 shows actuators 21 for the dosing cylinders 18 projecting laterally from the mould.
  • the pistons of the dosing cylinders may be moved outwards either by the pressure of the molten plastics materials supplied from the feed screws or by the actuators 21 when it is required to maintain a high pressure within the dosing cylinders 18.
  • the actuators 21 may be powered mechanically, electrically, pneumatically (e.g. air or nitrogen gas) or hydraulically and are controlled to inject the different plastics materials into the mould cavity in the desired sequence.
  • the pin that opens and closes the injection gate 28 has a section that acts as a spool valve so that when the gate is closed, the dosing cylinders are connected to be refilled by the two respective sources 30 and 40 of plastics material and when the gate is open each dosing cylinder communicates only with the line 26 or 27 leading to its associated mould cavity.
  • the pin is moved by means of a cam surface on a slide shaft displaced by means of a further actuator 50.
  • the gate 28 shown in Figure 3 comprises a heated body 52 with a central through bore 53 containing an axially displaceable pin 54 which either uncovers or blocks a narrow gate 56 through which the plastics material enters the mould cavity.
  • the end surface of the pin 54 it flush with the surface of the cavity when the injection gate is closed.
  • Two passages 58 and 60 for the different plastics materials are formed in the body 52 on its opposite sides.
  • the passages 58 and 60 communicate with the central through bore 53 immediately upstream of the gate 56. In this way, when the pin 54 is retracted, plastics material from either one of the passages can be introduced into the mould. With sequential injection, the first injected material will form a static layer in contact with the surfaces of the gate and - li ⁇
  • the injection gate of Figure 4 differs from that of Figure 3 in that the passage 62 for one of the plastics materials is annular and the second passage 64 discharges into the end of the central through bore 63.
  • the passage 62 for one of the plastics materials is annular and the second passage 64 discharges into the end of the central through bore 63.
  • one of the plastics materials is encased in a tube of the other allowing the injection into the mould cavity of a single bead having different compositions at the centre and at the surface.
  • FIG. 1 and 2 produces a thin-walled drinking cup as a finished article.
  • a drinking cup does not of course require a barrier layer, as it is not used to store foodstuffs for any length of time, but it will be appreciated that the article may be shaped as a tub designed to receive a lid or other seal over its open mouth.
  • the article produced by injection-compression may itself be a preform intended to be modified by mechanical stretching, blow moulding and vacuum forming to form a finished article, such as a bottle.
  • the preform may for example be a small thick-walled cylindrical tube having a thread at one end to receive a screw top. The tube can later be stretched and blown into the shape of a bottle. It is possible, after the preform has cooled, to transfer it to another machine where it is reheated and stretched. It is preferred, however, to leave the preform on the core 12 and to assemble around the core 12 a larger mould cavity into which the preform is expanded while it is still hot.

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

Abstract

L'invention concerne un procédé de moulage par injection-compression d'un article consistant à introduire deux matières plastiques différentes ou davantage dans une cavité de moule de manière qu'au moins la quantité totale des matières plastiques est prédéterminée, et à réduire le volume de la cavité du moule après introduction dans celui-ci des deux matières plastiques afin de forcer les matières plastiques à s'écouler et à remplir la totalité du volume de la cavité, de manière à former l'article voulu.
PCT/GB2004/003338 2003-08-16 2004-07-30 Pieces moulees en plastique WO2005018905A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0319264.8 2003-08-16
GBGB0319264.8A GB0319264D0 (en) 2003-08-16 2003-08-16 Plastics moulding

Publications (1)

Publication Number Publication Date
WO2005018905A1 true WO2005018905A1 (fr) 2005-03-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/003338 WO2005018905A1 (fr) 2003-08-16 2004-07-30 Pieces moulees en plastique

Country Status (2)

Country Link
GB (1) GB0319264D0 (fr)
WO (1) WO2005018905A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1745910A1 (fr) * 2005-07-21 2007-01-24 Patents Exploitation Company B.V. Unité de moulage par injection integrée pour produire des objets en matière plastique
WO2008025624A1 (fr) * 2006-08-26 2008-03-06 Mht Mold & Hotrunner Technology Ag Procédé pour la fabrication d'une préforme multicouche et buse d'injection à cet effet
WO2009103805A1 (fr) * 2008-02-21 2009-08-27 Netstal-Maschinen Ag Procédé et dispositif de moulage par injection-compression de préformes
WO2009103800A2 (fr) 2008-02-21 2009-08-27 Netstal-Maschinen Ag Procédé et dispositif de moulage par injection-compression de préformes
US10883075B2 (en) 2014-07-25 2021-01-05 Corning Incorporated Polymer surfaces for cell growth

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005164A (en) * 1973-01-12 1977-01-25 Hayssen Manufacturing Co. Method of making plastic containers
EP0755763A1 (fr) * 1994-03-28 1997-01-29 Sumitomo Chemical Company Limited Procede de fabrication d'articles multicouches moules
US5662856A (en) * 1995-07-12 1997-09-02 Imesco, Inc. Low-pressure method for the preparation of hollow plastic articles
JPH10156883A (ja) * 1996-11-29 1998-06-16 Ube Ind Ltd サンドイッチ成形品の製造方法およびその金型
US5833899A (en) * 1997-09-23 1998-11-10 Wunderlich; Ernst Dieter Method for the preparation of method articles by single and multi-layer compression and apparatus therefor
WO1999033636A1 (fr) * 1997-12-23 1999-07-08 Coraltech Limited Thermoformage ou moulage par soufflage de preformes moulees par injection
WO2002058908A1 (fr) * 2001-01-26 2002-08-01 Coraltech Limited Dispositif de dosage pour machine a mouler les matieres plastiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005164A (en) * 1973-01-12 1977-01-25 Hayssen Manufacturing Co. Method of making plastic containers
EP0755763A1 (fr) * 1994-03-28 1997-01-29 Sumitomo Chemical Company Limited Procede de fabrication d'articles multicouches moules
US5662856A (en) * 1995-07-12 1997-09-02 Imesco, Inc. Low-pressure method for the preparation of hollow plastic articles
JPH10156883A (ja) * 1996-11-29 1998-06-16 Ube Ind Ltd サンドイッチ成形品の製造方法およびその金型
US5833899A (en) * 1997-09-23 1998-11-10 Wunderlich; Ernst Dieter Method for the preparation of method articles by single and multi-layer compression and apparatus therefor
WO1999033636A1 (fr) * 1997-12-23 1999-07-08 Coraltech Limited Thermoformage ou moulage par soufflage de preformes moulees par injection
WO2002058908A1 (fr) * 2001-01-26 2002-08-01 Coraltech Limited Dispositif de dosage pour machine a mouler les matieres plastiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1745910A1 (fr) * 2005-07-21 2007-01-24 Patents Exploitation Company B.V. Unité de moulage par injection integrée pour produire des objets en matière plastique
WO2008025624A1 (fr) * 2006-08-26 2008-03-06 Mht Mold & Hotrunner Technology Ag Procédé pour la fabrication d'une préforme multicouche et buse d'injection à cet effet
WO2009103805A1 (fr) * 2008-02-21 2009-08-27 Netstal-Maschinen Ag Procédé et dispositif de moulage par injection-compression de préformes
WO2009103800A2 (fr) 2008-02-21 2009-08-27 Netstal-Maschinen Ag Procédé et dispositif de moulage par injection-compression de préformes
WO2009103800A3 (fr) * 2008-02-21 2009-10-15 Netstal-Maschinen Ag Procédé et dispositif de moulage par injection-compression de préformes
CN101945747A (zh) * 2008-02-21 2011-01-12 内兹塔尔机械公司 用于半成品的压缩压铸方法和装置
CN101945747B (zh) * 2008-02-21 2014-12-31 内兹塔尔机械公司 用于半成品的压缩压铸方法和装置
US10883075B2 (en) 2014-07-25 2021-01-05 Corning Incorporated Polymer surfaces for cell growth

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