WO1995001248A1 - Procede de depot de deux couches superposees d'un materiau thermoplastique sur une matrice de moule - Google Patents

Procede de depot de deux couches superposees d'un materiau thermoplastique sur une matrice de moule Download PDF

Info

Publication number
WO1995001248A1
WO1995001248A1 PCT/EP1994/001911 EP9401911W WO9501248A1 WO 1995001248 A1 WO1995001248 A1 WO 1995001248A1 EP 9401911 W EP9401911 W EP 9401911W WO 9501248 A1 WO9501248 A1 WO 9501248A1
Authority
WO
WIPO (PCT)
Prior art keywords
carriage
thermoplastics material
layers
conveyor
deposition
Prior art date
Application number
PCT/EP1994/001911
Other languages
English (en)
Inventor
Giorgio Ravera
Original Assignee
Giorgio Ravera
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 Giorgio Ravera filed Critical Giorgio Ravera
Priority to AU70005/94A priority Critical patent/AU7000594A/en
Publication of WO1995001248A1 publication Critical patent/WO1995001248A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/36—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from tapes, bands, or rollers rolled from under the 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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/08—Feeding of the material to be moulded, e.g. into a mould cavity of preforms to be moulded, e.g. tablets, fibre reinforced preforms, extruded ribbons, tubes or profiles; Manipulating means specially adapted for feeding preforms, e.g. supports conveyors
    • 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
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets

Definitions

  • the present invention relates to the field of compression moulding of hollow bodies of thermoplastics material and is intended to be applied specifically to a compression moulding process by means of which two superposed layers of thermoplastics material are moulded simultaneously in a single assembly and moulding operation.
  • Such a moulding process is known from Italian Patent Application No. 67598-A/90 which describes a method in which compressed air is supplied between two superposed layers of thermoplastics material at a pressure sufficient to mould the two layers into the dye cavities of the mould.
  • the present invention relates to a method for depositing two superpos.ed layers of thermoplastics material on a lower dye of compression moulding equipment.
  • thermoplastics sheet has already been proposed for enabling a thermoplastics sheet to be conveyed from the zone, for example an oven, in which it is heated to the moulding zone and which enables sheets to be deposited on the lower dye of the moulding equipment.
  • One of these known devices includes a carriage movable between the heating station and the moulding station and carrying a belt conveyor-
  • the equipment currently used enables the sheets to be deposited on the dye during the forward travel of the carriage only or during the return travel only, the term forward travel being understood as the travel in which the deposition device inserts itself between the two dyes and the term return travel being the phase in which this device moves away from the moulding zone. Therefore with the known equipment, two successive deposition cycles are normally required for the deposition of two superposed layers since a forward travel and a return travel of the carriage are required for the deposition of each sheet.
  • the object of the present invention is to provide a method of depositing two superposed layers of thermoplastics material which enables the time taken for the deposition cycle to be reduced compared with known solutions.
  • this object is achieved by virtue of the fact that the deposition device effects the deposition of a first layer of thermoplastics material during a forward travel of the movable carriage by actuation of the conveyor in a sense concordant with the direction of movement of the carriage and effects the deposition of a second layer of thermoplastics material during a return travel of the movable carriage by actuation of the conveyor in the sense discordant with the direction of movement of the carriage.
  • the two layers of thermoplastics material may be two separate sheets of different thicknesses or may be obtained by the folding of a single sheet on itself, the folding being achieved by the reversal of the direction of movement of the carriage at the end of the forward movement.
  • Figures 1 to 3 are schematic views illustrating the sequence of deposition of two separate sheets
  • Figure 4 is a schematic view showing the moulding phase
  • Figure 5 is a schematic view similar to Figures 1 to 3 illustrating the deposition of a single sheet folded on itself.
  • the lower dye and the upper dye of equipment for the compression moulding of thermoplastics sheets are schematically indicated 10 and 12 respectively.
  • a device generally indicated 14 for conveying and depositing the sheets is constituted essentially by a movable carriage 16 carrying a conveyor belt 18.
  • the term "conveyor belt” is intended to mean a conveyor having a flexible member which passes over a pair of pulleys, one of which is motor-driven.
  • the flexible member is preferably constituted by a flexible metal mesh which can withstand the temperatures, of the order of about a hundred degrees centigrade, to which the sheets of thermoplastics material are heated without appreciable yielding or expansion.
  • the movable carriage 16 engages a pair of lateral guides not illustrated and is driven by a .rack and pinion mechanism which drives its translational movement between a heating station and a moulding station.
  • the conveyor 18 has a motor-driven pulley 20 which can be driven in both senses of rotation and an idle return pulley 22, both carried by the movable carriage 16.
  • the movable carriage 16 also carries a metal plate 24 linked to the horizontal upper pass of the conveyor 18 and forming a ramp for the deposition of the sheets on the lower dye 10.
  • FIGs 1 to 3 illustrate the sequence of operation of the device 14 for depositing two thermoplastics sheets 26, 28, which are generally of different thicknesses, one on top of the other.
  • the two sheets 26, 28 may have a film of plastics material which facilitates their adhesion to a covering textile layer which is applied, in known manner, to the outer faces of the sheets 26, 28 during moulding.
  • the film which facilitates the adhesion of the textile layer faces upwardly in the condition in which the two sheets 26, 28 rest on the horizontal upper pass of the conveyor 18 to avoid any contact with the surface of the conveyor causing deterioration of the adhesiveness of the film.
  • the movable carriage 16 is brought to a position in which the free end 30 of the inclined ramp plate 24 lies approximately over an edge of the lower dye 10.
  • the first sheet 26 is advanced by actuation of the drive pulley 20 of the conveyor 18 until an edge of the sheet is located in correspondence with the free end 30 of the inclined plate 24.
  • the movable carriage 16 is advanced in the direction indicated by the arrow 32 in Figure 2 at a constant velocity and the conveyor 18 is actuated in a sense concordant with the direction of advance 32 of the carriage 16.
  • the absolute value of the conveyor belt velocity is equal to the translational velocity of the carriage 16.
  • the device 14 is in the configuration illustrated in Figure 3.
  • the conveyor 18 continues to move in the same sense (in the sense which, in the embodiment illustrated in the drawings, corresponds to actuation of the drive pulley 20 in the anticlockwise sense) and the translational movement of the carriage 16 is reversed which now moves in the direction indicated by the arrow 34 in Figure 3.
  • the conveyor 18 is actuated in the discordant sense with respect to the direction of movement of the carriage 16.
  • the end portion of a compressed air duct is inserted between the two sheets 26, 28 in a manner similar to that described in detail in patent document No. 67598-A/90.
  • the compressed air flow keeps the sheets 26, 28 apart whereas otherwise they could adhere to each other since they are in a plastic or ductile state.
  • sequence of deposition of the sheets 26, 28 means that the film of plastics material which facilitates the adhesion of a covering textile layer is located on the downwardly-facing surface of the lower sheet 26 and on the upwardly-facing surface of the upper sheet 28.
  • the two dyes 10, 12 are closed, as illustrated in Figure 4, and the pressure of the air supplied between the two sheets is increased so that these are moulded into in the dye cavities of the mould.
  • the covering layers are stretched on positioning frames which are inserted between the two dyes before, or simultaneously with, the deposition of the sheets 26, 28.
  • the method of depositing the layers 26, 28 described above is particularly suitable for two sheets 26, 28 of different thicknesses.
  • the two superposed layers deposited on the lower dye 10 may be obtained from a single sheet 40 folded on itself, as illustrated in Figure 5.
  • the conveyor 18 is driven in the sense concordant with the direction of advance of the carriage 16 to deposit a first layer 42.
  • the direction of movement of the carriage is reversed while the sense in which the conveyor 18 is driven is kept the same and thus the folding of the sheet 40 and the deposition of a second layer 44 is achieved.
  • compressed air is blown between the two layers 42, 44 at the same time as the second layer 44 is deposited.
  • the moulding of the two layers 42, 44 is achieved by supplying air at high pressure following the closure of the two dyes 10, 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Manufacturing & Machinery (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Procédé de dépôt de deux couches superposées d'un matériau thermoplastique sur une matrice inférieure (10) d'un dispositif de moulage par thermocompression, par l'intermédiaire d'un dispositif de transport et de dépôt (14) qui comprend un chariot mobile (16) portant une bande transporteuse (18). Le dispositif de dépôt dépose une première couche d'un matériau thermoplastique (26), au cours du mouvement vers l'avant du chariot mobile (16), par l'actionnement de la bande transporteuse (18) dans un sens coïncidant avec le sens de déplacement du chariot (16), et effectue le dépôt d'une seconde couche de matériau thermoplastique (28), au cours du mouvement de retour du chariot mobile (16), par l'actionnement de la bande (18) dans le sens contraire au sens de déplacement du chariot (16).
PCT/EP1994/001911 1993-07-02 1994-06-13 Procede de depot de deux couches superposees d'un materiau thermoplastique sur une matrice de moule WO1995001248A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70005/94A AU7000594A (en) 1993-07-02 1994-06-13 Method for depositing two superposed layers of thermoplastics material on a die

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930483A IT1261071B (it) 1993-07-02 1993-07-02 Procedimento per depositare due strati sovrapposti di materiale temoplastico su un semistampo
ITTO93A000483 1993-07-02

Publications (1)

Publication Number Publication Date
WO1995001248A1 true WO1995001248A1 (fr) 1995-01-12

Family

ID=11411598

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/001911 WO1995001248A1 (fr) 1993-07-02 1994-06-13 Procede de depot de deux couches superposees d'un materiau thermoplastique sur une matrice de moule

Country Status (3)

Country Link
AU (1) AU7000594A (fr)
IT (1) IT1261071B (fr)
WO (1) WO1995001248A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0755770A1 (fr) * 1995-07-28 1997-01-29 REHAU AG + Co Procédé de fabrication de produits moulés
EP1747873A1 (fr) * 2005-07-26 2007-01-31 Kojima Press Industry Co., Ltd. Procédé et dispositif pour extruder et transferer une feuille à une machine de thermoformage avec matrice mobile
EP2018952A1 (fr) * 2007-07-18 2009-01-28 Grupo Antolin-Ingenieria, S.A. Processus pour obtenir un produit de matériel thermoplastique, et produit correspondant
US7901201B2 (en) 2005-07-25 2011-03-08 Kojima Press Industry Co., Ltd. Press-molding machine and press-molding method
US8071008B1 (en) * 2008-03-27 2011-12-06 Ceradyne, Inc. Composite forming technology
WO2013153131A1 (fr) * 2012-04-13 2013-10-17 Faurecia Automotive Industrie Dispositif de thermoformage d'une feuille

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1391998A (fr) * 1964-01-31 1965-03-12 Wilson Edward & Son Perfectionnement aux dispositifs pour empiler ou transporter
FR1598411A (fr) * 1968-12-11 1970-07-06
FR2167460A1 (fr) * 1972-01-13 1973-08-24 Veluwse Machine Ind
JPS5981123A (ja) * 1982-11-01 1984-05-10 Toyota Motor Corp 圧縮成形用金型に可塑化樹脂材料を供給する方法および装置
JPS63144012A (ja) * 1986-12-05 1988-06-16 Mitsubishi Cable Ind Ltd シ−ト供給装置
WO1990012749A1 (fr) * 1989-04-17 1990-11-01 Illinois Tool Works Inc. Appareil pour couper ou empiler des materiaux en bande
EP0461365A1 (fr) * 1990-06-12 1991-12-18 Peter Stegmaier Procédé et appareil pour alimenter un moule de compression en matière plastique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1391998A (fr) * 1964-01-31 1965-03-12 Wilson Edward & Son Perfectionnement aux dispositifs pour empiler ou transporter
FR1598411A (fr) * 1968-12-11 1970-07-06
FR2167460A1 (fr) * 1972-01-13 1973-08-24 Veluwse Machine Ind
JPS5981123A (ja) * 1982-11-01 1984-05-10 Toyota Motor Corp 圧縮成形用金型に可塑化樹脂材料を供給する方法および装置
JPS63144012A (ja) * 1986-12-05 1988-06-16 Mitsubishi Cable Ind Ltd シ−ト供給装置
WO1990012749A1 (fr) * 1989-04-17 1990-11-01 Illinois Tool Works Inc. Appareil pour couper ou empiler des materiaux en bande
EP0461365A1 (fr) * 1990-06-12 1991-12-18 Peter Stegmaier Procédé et appareil pour alimenter un moule de compression en matière plastique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 400 (M - 756)<3247> 24 October 1988 (1988-10-24) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 191 (M - 322)<1628> 4 September 1984 (1984-09-04) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0755770A1 (fr) * 1995-07-28 1997-01-29 REHAU AG + Co Procédé de fabrication de produits moulés
US7901201B2 (en) 2005-07-25 2011-03-08 Kojima Press Industry Co., Ltd. Press-molding machine and press-molding method
EP1747873A1 (fr) * 2005-07-26 2007-01-31 Kojima Press Industry Co., Ltd. Procédé et dispositif pour extruder et transferer une feuille à une machine de thermoformage avec matrice mobile
EP2018952A1 (fr) * 2007-07-18 2009-01-28 Grupo Antolin-Ingenieria, S.A. Processus pour obtenir un produit de matériel thermoplastique, et produit correspondant
US9186826B2 (en) 2007-07-18 2015-11-17 Grupo Antolin-Ingenieria, S.A. Process for obtaining a thermoplastic material product, and the corresponding product
US8071008B1 (en) * 2008-03-27 2011-12-06 Ceradyne, Inc. Composite forming technology
WO2013153131A1 (fr) * 2012-04-13 2013-10-17 Faurecia Automotive Industrie Dispositif de thermoformage d'une feuille
FR2989305A1 (fr) * 2012-04-13 2013-10-18 Faurecia Automotive Ind Dispositif de thermoformage d'une feuille de materiau, notamment pour la realisation d'un revetement d'habitacle de vehicule automobile

Also Published As

Publication number Publication date
IT1261071B (it) 1996-05-08
ITTO930483A0 (it) 1993-07-02
AU7000594A (en) 1995-01-24
ITTO930483A1 (it) 1995-01-02

Similar Documents

Publication Publication Date Title
US4614558A (en) Method and apparatus for making a surface-lined article
US5482661A (en) Method for molding bonded plastics material
EP0776750B1 (fr) Machine à mouler par injection pour appliquer une feuille décorative
US6596218B2 (en) Method of producing coated molded plastic articles, and injection mold
US5000903A (en) Method of molding plastic products having chemically bonded protective coatings
JP2694920B2 (ja) 射出成形同時絵付方法及び装置
US4072553A (en) Apparatus controlling shrinkage of a sleeve wrap on a container
JP2003517382A (ja) 成形品の調製方法および装置
US5972151A (en) Method and apparatus for applying a cover sheet to the surface of a mold
WO1995001248A1 (fr) Procede de depot de deux couches superposees d&#39;un materiau thermoplastique sur une matrice de moule
US6243875B1 (en) Thermobonded gloves and methods of making same
CA2052003C (fr) Systeme d&#39;alimentation d&#39;etiquettes surmoulees pour machine a souffler des matieres plastiques
US5068076A (en) Method of forming an encapsulated glazing unit
US4133252A (en) Method and apparatus for securing carrying handles to bags
EP1554100B1 (fr) Procede de production d&#39;articles en polyurethanne, et dispositif correspondant
JP3439646B2 (ja) 射出成形同時絵付装置
RU2054357C1 (ru) Способ формования листовых термопластов и установка для его осуществления
EP0571897B1 (fr) Dispositif pour l&#39;alimentation automatique d&#39;une presse pour le formage de plaques en matériau thermoplastique
JPH08290439A (ja) 射出成形同時絵付方法及び装置
US20020187702A1 (en) Composite thermoplastic-thermoset resin material
US6383428B1 (en) Method for preparing molded article
US5996665A (en) Apparatus for transferring and extracting a blank of sticky material relative to a workstation, and a transforming press constituting an application thereof
JP2620841B2 (ja) 基材の部分加飾成形方法
JP3231965B2 (ja) 部分加飾用成形装置及び基材に部分加飾する部分加飾成形方法
WO1997003807A2 (fr) Procede de fabrication d&#39;elements de recouvrement de montant central et elements de recouvrement ainsi fabriques

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB GE HU JP KE KG KP KR KZ LK LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA