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FR2605265A2 - Device enabling a fabric preform to be produced and the said preform to be brought up against the walls of a mould - Google Patents

Device enabling a fabric preform to be produced and the said preform to be brought up against the walls of a mould Download PDF

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Publication number
FR2605265A2
FR2605265A2 FR8614752A FR8614752A FR2605265A2 FR 2605265 A2 FR2605265 A2 FR 2605265A2 FR 8614752 A FR8614752 A FR 8614752A FR 8614752 A FR8614752 A FR 8614752A FR 2605265 A2 FR2605265 A2 FR 2605265A2
Authority
FR
France
Prior art keywords
mold
fabric
box
cover
gunwale
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR8614752A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR7401274A external-priority patent/FR2257536A1/en
Priority claimed from FR8416107A external-priority patent/FR2572015A1/en
Application filed by Individual filed Critical Individual
Priority to FR8614752A priority Critical patent/FR2605265A2/en
Publication of FR2605265A2 publication Critical patent/FR2605265A2/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
    • 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
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/261—Handling means, e.g. transfer means, feeding means
    • B29C51/262—Clamping means for the sheets, e.g. clamping frames
    • 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
    • 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
    • B29C51/145—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 having at least one layer of textile or fibrous material combined with at least one plastics layer
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
    • 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
    • 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
    • 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
    • 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
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • 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
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • B29C51/06—Combined thermoforming and prestretching, e.g. biaxial stretching using pressure difference for prestretching
    • 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
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • 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
    • B29L2031/771—Seats

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a device enabling fabric preforms 6 to be preformed and then for the fabric to be shaped against the walls of a mould which includes an upper part 1 fixed to a sealed box 2, in which a partial vacuum may be created, and a lower part 4; the device is characterised in that the upper part 1 of the mould includes an edge flat 9 on which the edge flat 8 of the top 7 of the mould holds the fabric 6 while still allowing it to slide, the movement of the fabric 6 being limited by the clips 10. The device according to the invention is particularly intended for the production of seats made from plastic foam with an integral cover, for motor vehicles and for furniture.

Description

Dans sa demande de brevet principal, le demandeur a décrit un dispositif permettant successiverent de réaliser une ébauche en tissu et de mettre ladite ébauche en forme sur les parois du moule. In his main patent application, the applicant has described a device making it possible successively to produce a fabric blank and to shape said blank on the walls of the mold.

Conformément au dispositif décrit dans le brevet principal, le dispositif est caractérisé par un moule en deux parties représenté sur les figures 1 à 4. According to the device described in the main patent, the device is characterized by a two-part mold shown in FIGS. 1 to 4.

La partie supérieure (i) comprend les côtés du moule. Elle est fixée d'une manière étanche sur un caisson (2) muni d'un orifice (3).  The upper part (i) includes the sides of the mold. It is fixed in a sealed manner to a box (2) provided with an orifice (3).

La partie inférieure (4) du moule est placée à l'intérieur du caisson (2) et peut se déplacer pour venir s'appliquer contre la partie supérieure du moule (1). Son déplactment peut être réalisé par n'importe quel moyen approprié; le dispisitif représenté sur les figures 7 à 4 est un vérin hydraulique (5). The lower part (4) of the mold is placed inside the box (2) and can move to come to bear against the upper part of the mold (1). Its displacement can be achieved by any suitable means; the device shown in Figures 7 to 4 is a hydraulic cylinder (5).

Conformément au dispositif décrit dans la demande de brevet prin- cipal, on place un tissu (6) sur la partie supérieure du moule (t) et on le guide pendant son entrée dans le moule de façon à obtenir une contraction périmé trique optimale du tissu sur tout le périmètre du moule et éviter la formation de plis sur le tissu, en particulier dans les angles du moule. Dans la demande de brevet principal, le guidage du tissu est obtenu Erâce à des lames décrites par le demandeur dans la demande de brevet 840?84o.  In accordance with the device described in the main patent application, a fabric (6) is placed on the upper part of the mold (t) and it is guided during its entry into the mold so as to obtain an optimal perimeter contraction of the fabric over the entire perimeter of the mold and avoid the formation of folds on the fabric, in particular in the corners of the mold. In the main patent application, the guiding of the fabric is obtained by means of blades described by the applicant in patent application 840? 84o.

les travaux du demandeur ont montré que la présence de ces lames sur la périphérie du moule pouvait être un obstacle à la mise en place ultérieure du couvercle du moule précédant la coulée de la mousse de remplissage. the applicant's work has shown that the presence of these blades on the periphery of the mold could be an obstacle to the subsequent fitting of the mold cover before the filling foam is poured.

les travaux du demandeur ont montré également, qu'il était possible d'évlter cet inconvénient et de permettre la mise en forme convenable du tissu sur les parois du moule en procédant au guidage du tissu par un procédé différent. the work of the applicant has also shown that it is possible to overcome this drawback and allow the fabric to be properly shaped on the walls of the mold by guiding the fabric by a different process.

A cet effet, on place sur la partie supérieure du moule (1) un couvercle (7) dont le plat-bord (8) vient s'appliquer sur le plat-bord (9) de la partie supérieure du moule. To this end, a cover (7) is placed on the upper part of the mold (1), the gunwale (8) being applied to the gunwale (9) of the upper part of the mold.

Le tissu (6) se trouve donc placé entre les deux plat-bords qui le guident pendant son glissement à l'intérieur du moule et effacent les plis qui pourraient se former sur le tissu à l'extérieur du moule. De plus, des agrafes (lo) sont placees sur le pourtour du tissu. Ces agrafes viennet buter contre le plat-bord du moule pendant le glissement du tissu qu'elles limitent à la longueur désirée en tout point du périmètre du moule. The fabric (6) is therefore placed between the two gunwales which guide it during its sliding inside the mold and erase the folds which could form on the fabric outside the mold. In addition, staples (lo) are placed around the edge of the fabric. These staples come up against the gunwale of the mold during the sliding of the fabric which they limit to the desired length at any point of the perimeter of the mold.

Dans la mise en oeuvre du dispositif faisant l'objet de la présente invention, on place un tissu (6) entre la partie supérieure du moule (1) et le couvercle du moule (7). Sur ce tissu ont été placées des agrafes (10) de façon à limiter le glissement du tissu à l'intérieur du moule à sa valeur idéale. In the implementation of the device which is the subject of the present invention, a fabric (6) is placed between the upper part of the mold (1) and the cover of the mold (7). Staples (10) have been placed on this fabric so as to limit the sliding of the fabric inside the mold to its ideal value.

Far l'orifice (3) on met le caisson (2) en dépression de façon à provoquer le glissement du tissu à l'intérieur du moule. Le glissement du tissu s'arrête lorsque les agrafes (io) viennent au contact du platbord du couvercle (8).  Far the orifice (3) the box (2) is placed in depression so as to cause the sliding of the fabric inside the mold. The sliding of the fabric stops when the staples (io) come into contact with the plate edge of the cover (8).

On réduit alors la dépression dans le caisson (2) de façon à laisser le tissu reprendre sa position naturelle. On peut laisser persister dans le caisson une légère dépression de façon à ce que l'ébauche soit légèrement tendue pour éviter les plis. On déplace alors la partie inférieure du moule (4) jusqu'à ce qu'elle vienne en contact avec la partie supérieure (1)- èt on met le caisson (2) en dépression de façon à appliquer le tissu (6) sur toute la surface du moule. The depression in the box (2) is then reduced so as to let the fabric return to its natural position. We can leave a slight depression in the box so that the blank is slightly stretched to avoid wrinkles. We then move the lower part of the mold (4) until it comes into contact with the upper part (1) - and we put the box (2) in depression so as to apply the fabric (6) on all the mold surface.

La Figure 1 représente le moule sur lequel le tissu (6) a été placé. Figure 1 shows the mold on which the fabric (6) was placed.

La partie inférieure du moule (4) est en position basse.The lower part of the mold (4) is in the lower position.

La Figure 2 représente le même dispositif au moment où une dépression a été créée dans le caisson (2). Le tissu (6) est entré dans le moule et s'est, de plus, dégérement distendu. Figure 2 shows the same device when a depression was created in the box (2). The fabric (6) has entered the mold and has also become slightly distended.

Sur la Figure 3, la dépression a été fortement diminuée dans le caisson (2) et l'ébauche de tissu (6) est revenue, grâce à son élasticité, à ses dimensions normales. Elle reste légèrement tendue et sans plis grâce à une légère dépression maintenue dans le caisson (2). La partie inférieure du moule (4) est en train de remonter vers la partie supérieure du moule (1). In Figure 3, the vacuum has been greatly reduced in the box (2) and the fabric blank (6) has returned, thanks to its elasticity, to its normal dimensions. It remains slightly taut and without wrinkles thanks to a slight depression maintained in the box (2). The lower part of the mold (4) is going up towards the upper part of the mold (1).

La Figure 4 représente le dispositif au moment où les parties supérieure (i) et inférieure (4) du moule sont en contact et le tissu (6) appliqué par dépression sur les parois du moule. Une mousse souple de polyuréthane (12) a été coulée & intérieur de la housse ainsi formée par l'orifice (11) et est en train de se développer pour remplir tourbe la cavité du moule. Figure 4 shows the device when the upper (i) and lower (4) parts of the mold are in contact and the fabric (6) applied by vacuum to the walls of the mold. A flexible polyurethane foam (12) has been poured inside the cover thus formed by the orifice (11) and is being developed to fill the mold cavity with peat.

La Figure 5 représente le coussin à housse intégrée sorti de son moule. Figure 5 shows the integrated cover cushion out of its mold.

Sur la Figure 6, le coussin a été placé sur son support (15).  In Figure 6, the cushion has been placed on its support (15).

Dans une variante, le dispositif faisant l'objet de la présente invention est utilisé en double effet. Un film plastique souple et élastique (14) est placé sur le tissu (6) auquel il est fixé par les agrafes (10). L'ensemble film plastique et tissu est placé entre un caisson (15) et son couvercle (16). Dans ce cas particulier et sans limiter pour autant l'invention, la partie haute du moule a éte intégrée au caisson (15). On met alors en dépression le caisson (15) par son orifice (17) de façon à provoquer le glissement de l'ensemble tissu et film plastique à l'intérieur du caisson. In a variant, the device which is the subject of the present invention is used in double effect. A flexible and elastic plastic film (14) is placed on the fabric (6) to which it is fixed by the staples (10). The plastic film and fabric assembly is placed between a box (15) and its cover (16). In this particular case and without thereby limiting the invention, the upper part of the mold has been integrated into the box (15). The casing (15) is then placed under vacuum through its orifice (17) so as to cause the sliding of the fabric and plastic film assembly inside the casing.

Lorsque cette opération est terminée, on ramène le caisson à la pression atmosphérique et on enlève le couvercle (10). l'ébauche formée par le tissu et le film plastique reste sur le caisson (15). On place alors sur le caisson le couvercle du moule (18) après avoir rabattu les bords (19) de l'ébauche à l'intérieur du dispositif. When this operation is complete, the box is brought back to atmospheric pressure and the cover (10) is removed. the blank formed by the fabric and the plastic film remains on the box (15). The mold cover (18) is then placed on the box after the edges (19) of the blank have been folded back inside the device.

On remonte alors le poinçon (2G) jusqu'à ce qu'il vienne s'appuyer sur les bords du caisson (15). On met alors le caisson (15) en dépression de façon à appliquer l'ébauche sur toute la surface du poinçon. Entre le film plastique (14) et le couvercle du moule (1 & se trouve délimitée une cavité (21) que lton remplit de madère plastique rigide par injection à travars l'orifice (22). We then raise the punch (2G) until it comes to rest on the edges of the box (15). The box (15) is then placed under vacuum so as to apply the blank over the entire surface of the punch. Between the plastic film (14) and the mold cover (1 & there is defined a cavity (21) which is filled with rigid plastic made by injection through the orifice (22).

Après àircissemert de la matière plastique rigide, on remplace le caisson (15) par un caisson identique contenant la partie basse du moule (23). On met le caisson en dépression légère de façon à tendre légèrement le tissu (6) et on fait remonter la partie basse du moule (25) jusqu'à ce qu'elle vienne en contact avec le bord du caisson (15). On met alors le caisson en dépression de façon à appliquer le tissu (6) sur toute la surface du moule. After the rigid plastic material has been removed, the box (15) is replaced by an identical box containing the bottom part of the mold (23). The casing is placed in slight depression so as to slightly tension the fabric (6) and the bottom part of the mold (25) is raised up until it comes into contact with the edge of the casing (15). The casing is then placed under vacuum so as to apply the fabric (6) over the entire surface of the mold.

On remplit ensuite la cavité avec une mousse souple de polyuréthane (24) par injection à travers l'orifice (25) percé dans la matière plastique rigide. Après polymérisation de la mousse souple de polvuréthane, on démou- le le siège qui comprend sa coquille en matière plastique rigide et sa matelassure en mousse souple de polyuréthane intégrée.  The cavity is then filled with a flexible polyurethane foam (24) by injection through the orifice (25) drilled in the rigid plastic material. After polymerization of the flexible polyurethane foam, the seat is removed from the mold, which includes its rigid plastic shell and its integrated flexible polyurethane foam padding.

La Figure 7 représente le caisson (15) et son couvercle (16) entre lesquels est placé l'ensemble tissu/film plastique élastique. Figure 7 shows the box (15) and its cover (16) between which is placed the fabric / elastic plastic film assembly.

Sur la Figure ti, on vient d'appliquer la dépression sur le caisson (15) de façon à faire glisser l'ensemble tissu/film plastique-- élastique à l'intérieur du caisson. In Figure ti, we just applied the vacuum on the box (15) so as to slide the fabric / plastic film - elastic assembly inside the box.

Sur la Figure 9, on a remis le caisson à la pression atmosphérique et on a enlevé le couvercle (16). In Figure 9, the box was returned to atmospheric pressure and the cover (16) was removed.

La Figure 10 représente le caisson (15) sur lequel on a placé le couvercle du moule (18). l'ensemble tissu/film plastique est maintenu entre le couvercle et le caisson. Figure 10 shows the box (15) on which the mold cover (18) has been placed. the fabric / plastic film assembly is held between the cover and the box.

Sur la Figure 11, on a remonté le poinçon (20) jusqu'à ce qu'il vienne en contact avec le bord du caisson (15). Le caisson (15) est en dépression et on a injecté la matière plastique rigide dans la cavité (21). In Figure 11, the punch (20) has been raised until it comes into contact with the edge of the box (15). The box (15) is under vacuum and the rigid plastic has been injected into the cavity (21).

Sur la Figure 12 on a remplacé le caisson (15) par un caisson identique contenant la partie inférieure du moule (23). Une légère dépression maintient l'ébauche de la housse tendue afin d'éviter les plis. La partie inférieure du moule (23) est en train- de monter pour aller s'appuyer sur le bord du caisson. In FIG. 12, the box (15) has been replaced by an identical box containing the lower part of the mold (23). A slight depression keeps the blank of the cover taut to avoid wrinkles. The lower part of the mold (23) is going up to rest on the edge of the box.

La Figure 13 montre le moule fermé et en dépression. On vient d'injecter une mousse souple de polfuréthane (24) dans la housse. Figure 13 shows the mold closed and under vacuum. We have just injected a flexible polyurethane foam (24) into the cover.

la Figure 14 représente le siège démoulé avec sa coquille rigide (26) et sa matelassure à housse intégrée (27). Figure 14 shows the demolded seat with its rigid shell (26) and its padding with integrated cover (27).

Une autre variante intéressante de l'invention consiste à remplacer la matière plastique rigide remplissant la cavité (21) par une matière plastique souple renforcée par un insert rigide fixé sur le couvercle (1 & du moule.  Another interesting variant of the invention consists in replacing the rigid plastic material filling the cavity (21) with a flexible plastic material reinforced by a rigid insert fixed on the cover (1 & of the mold).

Claims (4)

svevendicationsclaims 1. Dispositif permettant le préformage d'ébauches de tissu puis la mise en forme du tissu sur les parois du moule, ledit dispositif comportant un moule en deux parties, la partie supérieure dudit moule portant sur son cadre un dispositif permettant d'obtenir une contrac tion périmétrique optimale du tissu sur la périphérie dudit cadre, la partie supérieure du moule étant fixée d'une manière étanche sur un caisson (2) dans lequel la partie inférieure du moule proprement dit (4) peut se déplacer verticalement de façon à venir s'appuyer sur la partie supérieure du moule (1), le caisson étant muni d'un orifice (3)#permet- tant de le mettre en dépression, dispositif caractérisé en ce que la partie supérieure (1) dudit moule comporte un plat-bord (9) et que sur ce plat-bord vient s'appuyer le couvercle du moule (7) par son plat-bord (8). 1. Device allowing the preforming of fabric blanks then the shaping of the fabric on the walls of the mold, said device comprising a mold in two parts, the upper part of said mold carrying on its frame a device making it possible to obtain a contrac optimal perimeter of the fabric on the periphery of said frame, the upper part of the mold being tightly fixed on a box (2) in which the lower part of the mold itself (4) can move vertically so as to come s '' press on the upper part of the mold (1), the box being provided with an orifice (3) # allowing it to be placed under vacuum, device characterized in that the upper part (1) of said mold comprises a flat- edge (9) and that on this gunwale rests the mold cover (7) by its gunwale (8). 2. Dispositif selon la revendication 7 caractérisé en ce que le tissu placé entre le plat-bord du moule (9) et le plat-bord du couvercle (8) est muni d'agrafes permettant de limiter le glissement dudit tissu à l'intérieur du moule sur toute sa périphérie. 2. Device according to claim 7 characterized in that the fabric placed between the gunwale of the mold (9) and the gunwale of the cover (8) is provided with staples making it possible to limit the sliding of said fabric inside of the mold over its entire periphery. 3. Dispositif selon les revendications 1 et 2 caractérisé par le fait que l'on utilise un ensemble formé par un tissu (6) et un film plastique élastique (14) agrafés ensemble sur leur périphérie; que ledit ensemble est placé sur la partie supérieure du caisson (15) et maintenu par un couvercle (16); que l'on met en dépression le caisson pour provoquer le glissement de l'ensemble tissu/film plastique dans le caisson; que l'on remet le caisson à la pression atmosphérique; que l'on remplace le couvercle (16) par le couvercle du moule proprement dit (18); que l'on amène le poinçon (20) au contact du bord supérieur du caisson; que l'on injecte dans la cavité (21) ainsi formée, entre le film plastique (14) et le couvercle du moule (18), une matière plastique rigide; que l'on remplace le caisson (15) par un caisson identique contenant la partie basse du moule proprement dit (23); que l'on remet le caisson en dépression légère; que l'on fait remonter la partie basse du moule (23) jusqu'à ce qu'elle prenne appui sur le rebord supérieur du caisson; que l'on met le caisson (15) en dépures sion et que l'on injecte une mousse souple de polyuréthane dans la nouvelle cavité ainsi formée, entre le filin plastique (14) et le tissu (6). 3. Device according to claims 1 and 2 characterized in that one uses an assembly formed by a fabric (6) and an elastic plastic film (14) stapled together on their periphery; that said assembly is placed on the upper part of the box (15) and held by a cover (16); that the casing is placed under vacuum to cause the sliding of the fabric / plastic film assembly in the casing; that the box is returned to atmospheric pressure; that the cover (16) is replaced by the cover of the actual mold (18); that the punch (20) is brought into contact with the upper edge of the box; that is injected into the cavity (21) thus formed, between the plastic film (14) and the mold cover (18), a rigid plastic material; that the box (15) is replaced by an identical box containing the lower part of the mold proper (23); that the box is put back into slight depression; that the lower part of the mold (23) is raised until it is supported on the upper edge of the box; that the box (15) is depurated and that a flexible polyurethane foam is injected into the new cavity thus formed, between the plastic rope (14) and the fabric (6). 4. Dispositif selon la revendication 3 caractérisé en ce que l'on remplit la cavité (21) avec une matière plastique souple dans laquelle est noyé un insert rigide fixé sur le couvercle du moule (18).  4. Device according to claim 3 characterized in that one fills the cavity (21) with a flexible plastic material in which is embedded a rigid insert fixed on the mold cover (18).
FR8614752A 1974-01-15 1986-10-16 Device enabling a fabric preform to be produced and the said preform to be brought up against the walls of a mould Pending FR2605265A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8614752A FR2605265A2 (en) 1974-01-15 1986-10-16 Device enabling a fabric preform to be produced and the said preform to be brought up against the walls of a mould

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR7401274A FR2257536A1 (en) 1974-01-15 1974-01-15 Soft foamed plastic cushion for automobile seating - by preforming textile piece, placing in mould, and filling with foamable material
FR8416107A FR2572015A1 (en) 1974-01-15 1984-10-22 Device enabling a fabric preform to be produced and brought to the walls of a mould
FR8614752A FR2605265A2 (en) 1974-01-15 1986-10-16 Device enabling a fabric preform to be produced and the said preform to be brought up against the walls of a mould

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633214A1 (en) * 1988-06-28 1989-12-29 Ikeda Bussan Co METHOD OF MOLDING A FOAMED ARTICLE COVERED WITH A COATING
EP1101590A1 (en) * 1999-11-16 2001-05-23 Webasto Vehicle Systems International GmbH Method of manufacturing a sandwich-type body part for a vehicle
WO2001074566A1 (en) * 2000-03-30 2001-10-11 Finasse (Societe Anonyme) Method for making a gelatinous cushion with reduced membrane effect

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222201A1 (en) * 1973-03-21 1974-10-18 Faure Bertrand Foam mouldings with rebated edges - moulded using cavity masks over the mould mouth
FR2280491A1 (en) * 1974-08-01 1976-02-27 Dunlop Ltd METHOD OF MANUFACTURING CAPITONNES AND MOLD ARTICLES FOR ITS IMPLEMENTATION
FR2348887A1 (en) * 1976-04-22 1977-11-18 Sanson Joseph PROCESS FOR MANUFACTURING A SEAT OR CUSHION IN PLASTIC FOAM WITH INTEGRATED COVER AND INCORPORATED FRAME
FR2369073A1 (en) * 1976-10-26 1978-05-26 Faure Bertrand Ind PROCESS
FR2439525A1 (en) * 1978-10-19 1980-05-16 Faure Bertrand Upholstery for vehicle seat - comprises plastics foam block core inside case shaped from initially flat sheet (BE 21.4.80)
DE3034973A1 (en) * 1980-09-17 1982-03-25 Metzeler Schaum Gmbh, 8940 Memmingen Vacuum forming cushion material for back-foaming - compressed air cushion each side at mould edge ensures accurate shaping
FR2572015A1 (en) * 1974-01-15 1986-04-25 Sanson Joseph Device enabling a fabric preform to be produced and brought to the walls of a mould

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222201A1 (en) * 1973-03-21 1974-10-18 Faure Bertrand Foam mouldings with rebated edges - moulded using cavity masks over the mould mouth
FR2572015A1 (en) * 1974-01-15 1986-04-25 Sanson Joseph Device enabling a fabric preform to be produced and brought to the walls of a mould
FR2280491A1 (en) * 1974-08-01 1976-02-27 Dunlop Ltd METHOD OF MANUFACTURING CAPITONNES AND MOLD ARTICLES FOR ITS IMPLEMENTATION
FR2348887A1 (en) * 1976-04-22 1977-11-18 Sanson Joseph PROCESS FOR MANUFACTURING A SEAT OR CUSHION IN PLASTIC FOAM WITH INTEGRATED COVER AND INCORPORATED FRAME
FR2369073A1 (en) * 1976-10-26 1978-05-26 Faure Bertrand Ind PROCESS
FR2439525A1 (en) * 1978-10-19 1980-05-16 Faure Bertrand Upholstery for vehicle seat - comprises plastics foam block core inside case shaped from initially flat sheet (BE 21.4.80)
DE3034973A1 (en) * 1980-09-17 1982-03-25 Metzeler Schaum Gmbh, 8940 Memmingen Vacuum forming cushion material for back-foaming - compressed air cushion each side at mould edge ensures accurate shaping

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633214A1 (en) * 1988-06-28 1989-12-29 Ikeda Bussan Co METHOD OF MOLDING A FOAMED ARTICLE COVERED WITH A COATING
EP1101590A1 (en) * 1999-11-16 2001-05-23 Webasto Vehicle Systems International GmbH Method of manufacturing a sandwich-type body part for a vehicle
WO2001074566A1 (en) * 2000-03-30 2001-10-11 Finasse (Societe Anonyme) Method for making a gelatinous cushion with reduced membrane effect
CN100343040C (en) * 2000-03-30 2007-10-17 芬纳斯公司 Method for making gelatinous cushion with reduced membrane effect

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