FR2643308A1 - Material for a moulding shell (casing), method of obtaining it and method for producing an article with such a shell (casing) - Google Patents

Material for a moulding shell (casing), method of obtaining it and method for producing an article with such a shell (casing) Download PDF

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Publication number
FR2643308A1
FR2643308A1 FR8902608A FR8902608A FR2643308A1 FR 2643308 A1 FR2643308 A1 FR 2643308A1 FR 8902608 A FR8902608 A FR 8902608A FR 8902608 A FR8902608 A FR 8902608A FR 2643308 A1 FR2643308 A1 FR 2643308A1
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France
Prior art keywords
sheet
layer
stampable
coating
casing
Prior art date
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Pending
Application number
FR8902608A
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French (fr)
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR8902608A priority Critical patent/FR2643308A1/en
Publication of FR2643308A1 publication Critical patent/FR2643308A1/en
Pending legal-status Critical Current

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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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/146—Shaping the lining before foaming
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • 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
    • B29C51/14—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 using multilayered preforms or sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The subject of the invention is a material for a moulding shell (casing). This material is noteworthy in that it consists of a sheet of elastic and impermeable covering material, one of the faces of the said sheet being coated with a layer of material which can be press-formed (stamped). Application to the production of various moulded articles made of composite plastics.

Description

La présente invention concerne les techniques de moulage et plus particulièrement le moulage des matières plastiques composites. The present invention relates to molding techniques and more particularly to the molding of composite plastics.

Le phénoménal développement de ces matières s'est manifesté principalement par leur emploi dans la réalisation des objets les plus divers intéressant pratiquement toutes les industries. Un des problèmes qui subsiste cependant avec l'emploi de ces matériaux réside dans la nécessité de procéder à des travaux de finition sur les objets obtenus par moulage, par exemple opération de pose d'un matériau de revêtement tel que peinture pour améliorer l'état de surface. On a donc songé à introduire, dès l'accomplissement des opérations de moulage, des matériaux de revêtement afin d'échapper à cette nécessité. Des difficultés sont toutefois apparues en raison de la perméabilité de ces matériaux aux produits employés pour le moulage et également en raison de leur faible rigidité ne leur permettant pas d'adopter et de conserver les formes souhaitées de l'objet moulé. The phenomenal development of these materials manifested itself mainly by their use in the realization of the most diverse objects interesting practically all the industries. One of the problems which still remains with the use of these materials lies in the need to carry out finishing work on the objects obtained by molding, for example operation of laying a coating material such as paint to improve the condition. of surface. Consideration has therefore been given to introducing, as soon as the molding operations have been completed, coating materials in order to avoid this need. Difficulties have arisen, however, because of the permeability of these materials to the products used for molding and also because of their low rigidity which does not allow them to adopt and maintain the desired shapes of the molded object.

La présente invention permet de résoudre ces difficultés. Elle a pour objet un matériau présentant de bonnes caractéristiques d'étanchéité et dont la structure permet d'adopter diverses formes susceptibles d'être données à un objet moulé quelconque. The present invention overcomes these difficulties. It relates to a material having good sealing characteristics and the structure of which makes it possible to adopt various shapes capable of being given to any molded object.

Plus précisément, l'invention concerne un matériau pour enveloppe de moulage, constitué d'une feuille de matériau de revêtement, élastique et étanche, dont l'une des faces est enrobée d'une couche de matériau emboutissable. La présence de cette couche de matériau emboutissable permettra de donner à l'enveloppe les formes requises de l'objet moulé tandis qte l'élasticité et l'imperméabilité du matériau de la feuille de revêtement permettront à cette dernière d'épouser étroitement les contours de cet objet et de vaincre les forces de pression exercées lors de l'expansion des produits de moulage. More specifically, the invention relates to a material for a molding envelope, consisting of a sheet of coating material, elastic and waterproof, one of the faces of which is coated with a layer of stampable material. The presence of this layer of stampable material will give the envelope the required shapes of the molded object while the elasticity and impermeability of the material of the covering sheet will allow the latter to closely match the contours of this object and to overcome the pressure forces exerted during the expansion of the molding products.

Certains de ces produits, tels que les résines ou mousses de polyuréthane expansibles, nécessitant un support constitué de cellules ouvertes, il pourra être utile, selon une forme de réalisation du matériau de l'invention, d'associer à la feuille de matériau de revêtement, une feuille de matériau poreux, la couche de matériau emboutissable étant disposée entre ladite feuille de matériau poreux et la susdite feuille de matériau de revêtement. Some of these products, such as expandable polyurethane resins or foams, requiring a support consisting of open cells, it may be useful, according to one embodiment of the material of the invention, to combine with the sheet of coating material , a sheet of porous material, the layer of stampable material being disposed between said sheet of porous material and said sheet of coating material.

Selon un mode de réalisation préféré, mais non exclusif, du matériau de l'invention, le revêtement élastique et étanche sera constitué avec un film de polyuréthane présentant une épaisseur de 30 u par exemple, et la feuille de matériau poreux pourra être obtenue à partir d'une mousse de polyester, ladite feuille présentant une épaisseur maximum de 1 cm. According to a preferred, but not exclusive, embodiment of the material of the invention, the elastic and waterproof coating will be formed with a polyurethane film having a thickness of 30 u for example, and the sheet of porous material may be obtained from polyester foam, said sheet having a maximum thickness of 1 cm.

La couche de matériau emboutissable pourra quant à elle être réalisée avec un réseau de fils de copolyester ou de copolyamide ou encore avec une poudre de l'un ou l'autre de ces deux composants, ladite couche pouvant présenter une épaisseur de 130 Eu.  The layer of stampable material may be produced with a network of copolyester or copolyamide wires or else with a powder of one or other of these two components, said layer possibly having a thickness of 130 Eu.

L'invention a d'autre part pour objet un procédé permettant d'obtenir un matériau destiné à la confection d'une enveloppe de moulage, comprenant les matériaux ci-dessus mentionnés. The invention also relates to a method for obtaining a material for making a molding shell, comprising the materials mentioned above.

Ce procédé consiste principalement à faire défiler, simultanément et dans des plans superposés, une feuille de matériau poreux et une feuille de matériau de revêtement, à disposer entre les faces opposées desdites feuilles une couche de matériau emboutissable, et à soumettre lesdites feuilles et ladite couche, après leur réunion, à une température de l'ordre de 1200C et à une pression de l'ordre de i bar. This method mainly consists in running, simultaneously and in superimposed planes, a sheet of porous material and a sheet of coating material, placing between the opposite faces of said sheets a layer of stampable material, and subjecting said sheets and said layer , after their meeting, at a temperature of the order of 1200C and at a pressure of the order of i bar.

Le dispositif permettant de mettre en oeuvre ce procédé de fabrication en continu ne sera pas plus amplement décrit dans la mesure où de tels dispositifs sont bien connus de l'Homme de l'Art. Toutefois et à titre d'exempie, il peut être précisé que la vitesse de défilement qui pourra être adoptée sera de l'ordre de 4 mètres par minute. The device allowing this continuous manufacturing process to be implemented will not be described more fully insofar as such devices are well known to those skilled in the art. However, by way of example, it can be specified that the running speed which may be adopted will be of the order of 4 meters per minute.

Le matériau obtenu, se présentant sous la forme d'une bande, pourra être stocké à température ambiante avant d'être utilisé pour la réalisation d'un objet moulé quelconque. The material obtained, in the form of a strip, can be stored at room temperature before being used for the production of any molded object.

L'invention concerne ainsi également un procédé permettant de réaiiser un tel objet avec une enveloppe de moulage confectionnée à partir de ce matériau. The invention thus also relates to a method making it possible to produce such an object with a molding envelope made from this material.

Ce procédé consiste essentiellement dans les étapes suivantes
* cn porte à une température comprise entre 120 et 1300C, une bande dudit matériau présentant des dimensions déterminées
* on comprime à froid ladite bande pour lui donner une forme déterminée, autrement dit la forme de l'objet à mouler, et ceci grâce à la présence de la couche de matériau emboutissable
* on réuni étroitement et de manière indissociable, par exemple par couture ou par soudure, les bords de ladite bande emboutie pour obtenir une gaine qui constituera l'enveloppe de l'objet moulé
* on place ladite gaine dans un moule conventionnel; ; et
* on injecte dans ladite gaine une produit expansible.This process consists essentially of the following steps
* At a temperature between 120 and 1300C, a strip of said material having determined dimensions
* said strip is cold pressed to give it a determined shape, in other words the shape of the object to be molded, and this thanks to the presence of the layer of stampable material
* the edges of said stamped strip are joined together closely and inseparably, for example by sewing or by welding, to obtain a sheath which will constitute the envelope of the molded object
* said sheath is placed in a conventional mold; ; and
* an expandable product is injected into said sheath.

Ce produit viendra ainsi remplir les pores de la feuille de matériau poreux mais sera limité dans son expansion notamment par les effets conju-. This product will thus fill the pores of the sheet with porous material but will be limited in its expansion in particular by the conjugal effects.

gués du matériau embouti et du matériau de revêtement.for the stamped material and the coating material.

Selon un mode possible de mise en oeuvre de ce procédé, le produit expansible employé pourra être une mousse de polyuréthane.  According to a possible embodiment of this process, the expandable product used may be a polyurethane foam.

Claims (9)

REVENDICATIONS 1. Matériau pour enveloppe de moulage, CARACTERISE EN CE QU'il est constitué d'une feuille de matériau de revêtement, élastique et étanche, une des faces de ladite feuille étant enrobée d'une couche de matériau emboutissable. 1. Material for molding shell, CHARACTERIZED IN THAT it consists of a sheet of coating material, elastic and waterproof, one of the faces of said sheet being coated with a layer of stampable material. 2. Matériau selon la Revendication 1, CARACTERISE EN CE QU'il comprend en outre une feuille de matériau poreux, la susdite couche de matériau emboutissable étant disposée entre ladite feuille de matériau poreux et la susdite feuille de matériau de revêtement. 2. Material according to Claim 1, CHARACTERIZED IN THAT it further comprises a sheet of porous material, the said layer of stampable material being disposed between said sheet of porous material and the said sheet of coating material. 3. Matériau selon la Revendication 1 ou 2, CARACTERISE EN CE QUE ledit matériau de revêtement, élastique et étanche, est un film de polyuréthane. 3. Material according to Claim 1 or 2, CHARACTERIZED IN THAT said coating material, elastic and waterproof, is a polyurethane film. 4. Matériau selon la Revendication 1 ou 2, CARACTERISE EN CE QUE ladite couche de matériau emboutissable est constituée par un réseau de fils de copolyester ou de copolyamide. 4. Material according to Claim 1 or 2, CHARACTERIZED IN THAT said layer of stampable material is constituted by a network of copolyester or copolyamide wires. 5. Matériau selon la Revendication 1 ou 2, CARACTERISE EN CE QUE ladite couche de matériau emboutissable est constituée par de la poudre de copolyester ou de copolyamide. 5. Material according to Claim 1 or 2, CHARACTERIZED IN THAT said layer of embossable material consists of copolyester or copolyamide powder. 6. Matériau selon la Revendication 2, CARACTERISE EN CE QUE ledit matériau poreux est une mousse de polyester. 6. Material according to Claim 2, CHARACTERIZED IN THAT said porous material is polyester foam. 7. Procéda pour obtenir un matériau d'enveloppe de moulage selon l'une quelconque des Revendications 2 à 6, CARACTERISE EN CE QU'il consiste à faire défiler simultanément et dans des plans superposés une feuille de matériau poreux et une feuille de matériau de revêtement, à disposer entreles faces opposées desdites feuilles une couche de matériau emboutissable, et à soumettre lesdites feuilles et ladite couche, après leur réunion, à une température de 120cl et à une pression de 1 bar. 7. Procedure for obtaining a molding envelope material according to any one of Claims 2 to 6, CHARACTERIZED IN THAT it consists in scrolling simultaneously and in superimposed planes a sheet of porous material and a sheet of material of coating, placing between the opposite faces of said sheets a layer of stampable material, and subjecting said sheets and said layer, after their combination, at a temperature of 120 cl and a pressure of 1 bar. 8. Procédé pour réaliser un objet avec une enveloppe de moulage confectionnée à partir du matériau obtenu selon la Revendication 7, CARAC 8. Method for producing an object with a molding envelope made from the material obtained according to Claim 7, CARAC TERISE EN CE QU'il consiste TERISE IN WHAT IT CONSISTS * à porter à une température comprise entre 120 et i300C, une bande dudit matériau présentant des dimensions déterminées, * to bring to a temperature between 120 and i300C, a strip of said material having determined dimensions, * à comprimer à froid ladite bande pour lui donner une forme déterminée, * cold compressing said strip to give it a specific shape, * à réunir étroitement les bords de- ladite bande afin d'obtenir une gaine, * to closely join the edges of said strip in order to obtain a sheath, * à placer ladite gaine dans un moule conventionnel, et * placing said sheath in a conventional mold, and * à injecter dans ladite gaine un produit expansible.  * injecting an expandable product into said sheath. QUE le produit expansible est une mousse de polyuréthane. THAT the expandable product is a polyurethane foam. 9 Procédé selon la Revendication précédente, CARACTERISE EN CE 9 Method according to the preceding claim, CHARACTERIZED IN THIS
FR8902608A 1989-02-21 1989-02-21 Material for a moulding shell (casing), method of obtaining it and method for producing an article with such a shell (casing) Pending FR2643308A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8902608A FR2643308A1 (en) 1989-02-21 1989-02-21 Material for a moulding shell (casing), method of obtaining it and method for producing an article with such a shell (casing)

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Application Number Priority Date Filing Date Title
FR8902608A FR2643308A1 (en) 1989-02-21 1989-02-21 Material for a moulding shell (casing), method of obtaining it and method for producing an article with such a shell (casing)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701231A1 (en) * 1993-02-08 1994-08-12 Plastimo Method of manufacturing a floating rescue device and floating device obtained according to this method
WO1995016552A1 (en) * 1993-12-15 1995-06-22 Möller Werke GmbH Method of producing plastic mouldings with a decorative surface layer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2079175A1 (en) * 1970-02-02 1971-11-12 Inmont Corp
FR2085615A1 (en) * 1970-03-24 1971-12-24 Jover Manuf Jose Forming elastic mouldings - esp of expanded plastics for cushions
FR2097510A5 (en) * 1970-07-09 1972-03-03 Aerospatiale Polyester laminates - with a finishing coat applied to the mould
FR2137223A1 (en) * 1971-05-17 1972-12-29 Chomarat & Cie Composite seat cushions - with a polyurethane skin on a thermoplastic foam over a coarser thermosetting foam
FR2203273A5 (en) * 1972-10-13 1974-05-10 Chomarat Et Cie A Ets Composite seating upholstery of fabric and foams - with surface profiles obtained by integral thermoforming of extensible fabric and foamed sheet covers
US3932252A (en) * 1974-10-18 1976-01-13 Deere & Company Process for the manufacture of composite foam and fabric articles
DE3123355A1 (en) * 1981-06-12 1982-12-30 J.H. Benecke Gmbh, 3000 Hannover Thermoformable plastic sheet
EP0266107A2 (en) * 1986-10-28 1988-05-04 Rexham Industries Corp. Injection molded plastic article with integral weatherable pigmented film surface

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2079175A1 (en) * 1970-02-02 1971-11-12 Inmont Corp
FR2085615A1 (en) * 1970-03-24 1971-12-24 Jover Manuf Jose Forming elastic mouldings - esp of expanded plastics for cushions
FR2097510A5 (en) * 1970-07-09 1972-03-03 Aerospatiale Polyester laminates - with a finishing coat applied to the mould
FR2137223A1 (en) * 1971-05-17 1972-12-29 Chomarat & Cie Composite seat cushions - with a polyurethane skin on a thermoplastic foam over a coarser thermosetting foam
FR2203273A5 (en) * 1972-10-13 1974-05-10 Chomarat Et Cie A Ets Composite seating upholstery of fabric and foams - with surface profiles obtained by integral thermoforming of extensible fabric and foamed sheet covers
US3932252A (en) * 1974-10-18 1976-01-13 Deere & Company Process for the manufacture of composite foam and fabric articles
DE3123355A1 (en) * 1981-06-12 1982-12-30 J.H. Benecke Gmbh, 3000 Hannover Thermoformable plastic sheet
EP0266107A2 (en) * 1986-10-28 1988-05-04 Rexham Industries Corp. Injection molded plastic article with integral weatherable pigmented film surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701231A1 (en) * 1993-02-08 1994-08-12 Plastimo Method of manufacturing a floating rescue device and floating device obtained according to this method
WO1995016552A1 (en) * 1993-12-15 1995-06-22 Möller Werke GmbH Method of producing plastic mouldings with a decorative surface layer
US6146564A (en) * 1993-12-15 2000-11-14 Moller Plast Gmbh Process for the production of plastic molded parts with decorative lamination

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