FR2649930A1 - Rotomoulded hollow article and its method of manufacture - Google Patents

Rotomoulded hollow article and its method of manufacture Download PDF

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Publication number
FR2649930A1
FR2649930A1 FR9008965A FR9008965A FR2649930A1 FR 2649930 A1 FR2649930 A1 FR 2649930A1 FR 9008965 A FR9008965 A FR 9008965A FR 9008965 A FR9008965 A FR 9008965A FR 2649930 A1 FR2649930 A1 FR 2649930A1
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FR
France
Prior art keywords
molded
mold
rotation
insert
supports
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.)
Granted
Application number
FR9008965A
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French (fr)
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FR2649930B1 (en
Inventor
Toyoo Takahashi
Hiroshi Takei
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.)
Bandai Namco Holdings France SAS
Original Assignee
Bandai France SA
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 Bandai France SA filed Critical Bandai France SA
Publication of FR2649930A1 publication Critical patent/FR2649930A1/en
Application granted granted Critical
Publication of FR2649930B1 publication Critical patent/FR2649930B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H9/00—Special methods or compositions for the manufacture of dolls, toy animals, toy figures, or parts thereof
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/20—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. moulding inserts or for coating 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • 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
    • B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
    • B29L2031/5209—Toys
    • B29L2031/5218—Dolls, puppets

Abstract

This rotomoulded hollow article 1 includes, in its cavity, at least one attachment 5 made of the same material as the main material of the article and connected to this article, this attachment being suitable for receiving a support formed on an injection-moulded insert intended to be placed in the article. Application to toys, especially dolls.

Description

La présente invention concerne La technique de mouLage par rotation. PLus particuLièrement, dans un procédé de mouLage par rotation, permettant de mou
Ler un objet en maintenant fLuide La matière contenue dans Le mouLe, La présente invention propose une mé 'thode d'insertion d'une pièce injectée dans L'objet mouLé par rotation, ainsi que L'objet mouLé Lui-meme
ActueLLement, pour fabriquer des jouets soupLes au toucher, poupées ou animaux, on emploie Le moulage par rotation, méthode dans LaqueLLe on commence par fabriquer un corps creux dont La paroi interne épouse La forme de L'objet a mouLer et dans LequeL on
introduit La matière (soL de chLorure de vinyLe par exempLe) que L'on chauffe pour La fLuidifier, et,
Lorsque Ladite matière atteint L'épaisseur vouLue, on
La fait refroidir avant de La sortir du moule.The present invention relates to the rotational molding technique. MOST PARTICULARLY, in a rotational molding process, allowing slack
Ler an object by maintaining fluid The material contained in the mold, The present invention provides a method of inserting a part injected into the object molded by rotation, as well as the molded object itself
Currently, to make toys that are soft to the touch, dolls or animals, rotational molding is used, a method in which we begin by manufacturing a hollow body whose internal wall follows the shape of the object to be molded and in which
introduces the material (soL of vinyl chloride for example) that is heated to fluidify it, and,
When said material reaches the desired thickness,
Cools it before removing it from the mold.

SeLon Le procédé conventionneL sus-menti on- né, iL n'était pas possibLe de coLLer ni de souder un
insert queLconque mouLé par injection a L'intérieur de
L'objet mouLé par rotation, en raison de L'incompatibiLité des matières utiLisées dans ces deux types de mouLages. Ledit objet mouLé par rotation étant soupLe, iL n'était pas possibLe non pLus de fixer L'insert par vissage ou boutonnage.ACCORDING TO THE ABOVE-MENTIONED CONVENTIONAL PROCESS, IT WAS NOT POSSIBLE TO COLLAR OR WELD A
insert that is injection molded inside
The object rotated, due to the incompatibility of the materials used in these two types of molding. Said rotational molded object being flexible, it was not possible not more to fix the insert by screwing or buttoning.

La présente invention a donc pour but de proposer un procédé permettant de monter un insert mouLé par injection dans un objet mouLé par rotation. The present invention therefore aims to provide a method for mounting an insert molded by injection into an object molded by rotation.

A cet effet, L'invention a pour objet un objet creux mouLé par rotation, caractérisé en ce qu'iL comporte dans se cavité au moins une attache constituée de La même matière que La matière principaLe de
L'objet et reLiée à cet objet, cette attache étant adaptée pour recevoir un support formé sur un insert mouLé par injection destiné a être mis en pLace dans
L'objet.To this end, the invention relates to a hollow object molded by rotation, characterized in that it comprises in its cavity at least one fastener made of the same material as the main material of
The object and related to this object, this fastener being adapted to receive a support formed on an injection molded insert intended to be placed in
The object.

L'objet creux peut notamment être constitué par une partie d'une poupée ou d'un animal. The hollow object can in particular consist of a part of a doll or of an animal.

L'invention a égaLement pour objet un procédé de mouLage par rotation d'un objet creux, dans
LequeL La matière principaLe est rendue fLuide dans Le mouLe de mouLage par rotation, caractérisé en ce que, en fonction de La position ou L'on souhaite fixer un insert mouLé par injection, on monte sur Le couvercLe du mouLe un bLoc muni d'un ou pLusieurs supports, on adapte a L'extrémité de ces supports des attaches destinées à fixer Ledit insert mouLé par injection et faites de La même matière que Ladite matière principaLe, de manière que Lesdites attaches soient incor porées à L'objet mouLé Lors de La rotation, puis, après Le mouLage, on retire du mouLe Le bLoc avec Le couvercle. Cxn obtient donc ainsi un objet mouLé par rotation comportant des éLéments de fixation pour un insert
Comme indiqué ci-dessus, on monte, en fonction de La position ot L'on souhaite fixer L'insert mouLé par injection, un bLoc muni d'un ou pLusieurs supports à L'extrémité desqueLs se trouve une attache correspondante faite de La même matière que La matière principaLe et destinée a fixer Lesdits inserts mouLés par injection Ces attaches, se trouvant tout près de
La paroi intérieure du mouLe destiné a La rotation, feront corps avec La paroi de L'objet mouLé Lorsque La matière principaLe fluidifiée se sera déposée.The invention also relates to a method of molding by rotation of a hollow object, in
The main material is made fluid in the rotational molding mold, characterized in that, depending on the position where it is desired to fix an injection-molded insert, a bLoc fitted with a mold is mounted on the mold cover. or several supports, adapters are attached to the end of these supports intended to fix said injection molded insert and made of the same material as said main material, so that said fasteners are incorporated into the object molded during the rotation, then, after molding, the mold is removed from the mold with the cover. Cxn thus obtains a rotational molded object comprising fixing elements for an insert
As indicated above, depending on the position and mounting of the injection molded insert, a bLoc fitted with one or more supports is fitted at the end of which there is a corresponding fastener made of the same material that the main material is intended to fix said injection molded inserts These fasteners, located very close to
The inner wall of the mold intended for rotation will become one with the wall of the molded object when the main fluidized material is deposited.

Le processus de mouLage une fois terminé, on refroidit Le mouLe et on retire Le bLoc muni des supports en même temps que Le couvercLe; Les attaches restent fixées sur La paroi intérieure de L'objet mou
Lé par rotation. Once the molding process is complete, the mold is cooled and the boc fitted with the supports is removed at the same time as the cover; The fasteners remain fixed on the inner wall of the soft object
Read by rotation.

IL ne reste plus aLors qu'a assembLer Les supports ou embouts prévus sur L'insert mouLé par injection et Les attaches de fixation ainsi formées pour fixer, à L'intérieur de L'objet mouLé par rotation, La pièce injectée. It then only remains to assemble the supports or nozzles provided on the injection molded insert and the fixing fasteners thus formed to fix, inside the object molded by rotation, the injected part.

Un exempLe de réaLisation de L'invention va maintenant être décrit en regard du dessin annexé, dont La Figure unique est une vue en coupe
LongitudinaLe d'un mouLe destiné à La mise en oeuvre de L'invention.An exemplary embodiment of the invention will now be described with reference to the accompanying drawing, of which the single figure is a sectional view.
LongitudinaLe of a mold intended for the implementation of the invention.

La Figure représente La coupe d'un mouLe 3 destiné à fabriquer, par rotation, une tête de poupée 1. Dans ce mouLe se trouve un bLoc 2 pourvu de trois supports 4 prolongés par une attache 5 de même matière que La matière principaLe et disposés en fonction des empLacements souhaités pour fixer un objet mouLé par injection
Con procède comme habitueLLement, en versant un sot de chLorure de vinyLe comme matière principaLe dans Le mouLe 3 de mouLage par rotation, pour former
La tête de poupée 1, et en Le Laissant se déposer sur
La paroi intérieure du moule, tout en Le chauffant et en L'agitant.Toutefois, on a ajouté Le bLoc 2 muni des trois supports 4, disposés en fonction des empLacements choisis pour fixer L'objet mouLé par injection et dont chacun est doté a son extrémité d'une attache 5 de meme matière que La matière principale. On fixe cet ensembLe sur Le couvercLe 6 du mouLe 3, et L'on introduit Le tout dans Le mouLe 3 Le support 4 centraL se trouve aLors en face du menton de La poupée, et Les deux autres, à droite et a gauche, se trouvent près de La paroi des joues.The Figure shows The section of a mold 3 intended to make, by rotation, a doll head 1. In this mold there is a bLoc 2 provided with three supports 4 extended by a fastener 5 of the same material as the main material and arranged according to the desired locations to fix an injection molded object
Con proceeds as usual, pouring a dump of vinyl chloride as the main material in the rotational molding mold 3, to form
Doll head 1, and letting it settle on
The interior wall of the mold, while heating and agitating it. However, we added the bLoc 2 provided with the three supports 4, arranged according to the locations chosen to fix the object molded by injection and each of which has its end of a fastener 5 of the same material as the main material. This assembly is fixed on the cover 6 of the mold 3, and we introduce everything into the mold 3 The central support 4 is then in front of the doll's chin, and The two others, on the right and on the left, are found near the cheek wall.

Lorsque L'on commence Le moulage dans Les memes conditions que mentionné ci-dessus, La matière principale fluidifiée vient se déposer sur La paroi intérieure du mouLe 3, et s'y accumuLe progressivement pour former Le produit mouLé 1, jusqu'a atteindre Les points de fixation 7 des attaches 5, puis, La couche devenant pLus épaisse, jusqu'a Les enrober pour que
Les attaches fassent corps avec La paroi intérieure de
L'objet mouLé 1
Le mouLage ainsi terminé, on retire, après un temps de refroidissement, Le couvercLe 6 et Le bLoc 2 muni de ses supports, et on démoule L'objet 1 obtenu, comportant aLors Les attaches 5.When molding is started under the same conditions as mentioned above, the main fluidized material is deposited on the inner wall of the mold 3, and gradually accumulates therein to form the molded product 1, until reaching the attachment points 7 of the fasteners 5, then, the layer becoming thicker, until coating them so that
The fasteners are integral with the inner wall of
MOLDED OBJECT 1
The molding thus finished, the cover 6 and the bLoc 2 provided with its supports are removed, after a cooling time, and the object 1 obtained is removed from the mold, comprising the fasteners 5.

usant a L'insert mouLé par injection destiné a être placé a L'intérieur de L'objet mouLé 1, iL suffit de prévoir sur Lui des supports ou embouts simi
La ires a ceux, 4, mentionnés ci-dessus, et de Les adapter sur Les attaches 5 incorporées dans L'objet mouLé par rotation. On obtient ainsi un objet mouLé par rotation comportant a L'intérieur un insert mouLé par injection
Dans cet exempLe d'appLication, on a réalisé une tête de poupée, mais iL est néanmoins parfaitement possibLe de fabriquer Le corps ou Les membres supé- rieurs et inférieurs d'une poupée, aussi bien que des animaux ou tout autre objet mouLabLe par rotation, et d'y incorporer, par Le présent procédé, un insert que
L'on souhaite pLacer à L'intérieur de L'objet mouLé par rotation.using the injection molded insert intended to be placed inside the molded object 1, it suffices to provide on it supports or similar tips
The ires to those, 4, mentioned above, and to adapt them on the fasteners 5 incorporated in the object molded by rotation. A rotational molded object is thus obtained, which has an injection molded insert on the inside.
In this example of application, a doll head has been produced, but it is nevertheless perfectly possible to manufacture the body or the upper and lower members of a doll, as well as animals or any other movable object by rotation. , and incorporate therein, by the present process, an insert that
You want to place it inside the rotational molded object.

IL est bien évident que Le nombre de supports adaptés sur Le bLoc 2 n'est pas Limité a trois, et qu'en fonction de La nature de L'insert a pLacer dans L'objet moulé, iL peut être réduit a un seuL ou muLtipLié seLon Les besoins. It is obvious that the number of supports adapted to the bLoc 2 is not limited to three, and that depending on the nature of the insert to be placed in the molded object, it can be reduced to a single or MULTIPALED AS REQUIRED.

La présente invention permet donc, comme on vient de Le voir, de fixer a L'intérieur d'un objet soupLe mouLé par rotation, un insert fait d'une matie re différente et moulé par injection Les supports montes sur L'insert moulé par injection s'accrochant parfaitement aux attaches incorporées dans La paroi de
L'objet mouLé par rotation, on pourra, dans Le cas du présent exempLe d'appLication, doter La poupée de joues ou d'un menton articuLes
Cette opération, pouvant être exécutée en meme temps que Le mouLage par rotation de L'objet a fabriquer, permet des économies sensibLes du nombre d'opérations et du temps de réaLisation. The present invention therefore makes it possible, as we have just seen, to fix the inside of a rotatable molded object, an insert made of a different material and injection molded The supports mounted on the insert molded by injection clinging perfectly to the fasteners incorporated in the wall of
The object molded by rotation, it will be possible, in the case of this example of application, to endow the doll with cheeks or with an articulated chin
This operation, which can be carried out at the same time as the rotational molding of the object to be manufactured, allows significant savings in the number of operations and in the time taken.

Claims (3)

REVENDICATiONS 1 - Objet creux (1) mouLé par rotation, caractérisé en ce qu'iL comporte dans sa cavité au moins une attache (5) constituée de La même matière que La matière principaLe de L'objet et reLiée a cet objet, cette attache étant adaptée pour recevoir un support formé sur un insert mouLé par injection destiné a être mis en place dans L'objet 1 - Hollow object (1) rotatably molded, characterized in that it has in its cavity at least one fastener (5) made of the same material as the main material of the object and connected to this object, this fastener being adapted to receive a support formed on an injection molded insert intended to be placed in the object 2 - Objet creux suivant La revendication 1, constitué par une partie d'une poupée ou d'un animaL 2 - hollow object according to claim 1, consisting of a part of a doll or an animal 3 ~~- Procédé de mouLage par rotation d'un objet creux (#), dans LequeL on fluidifie La matière principale dans Le mouLe (3) destiné a La rotation, caractérisé en ce que, en fonction de La position oh 3 ~~ - Molding process by rotation of a hollow object (#), in which the main material is fluidized in the mold (3) intended for rotation, characterized in that, depending on the position oh L'on souhaite fixer un insert mouLé par injection, on monte sur Le couvercLe (6) du mouLe un bLoc (2) muni d'un ou pLusieurs supports (4), on adapte à L'extrémité de ces supports des attaches (5) destinées a fixer Ledit insert mouLé par injection et faites deWe wish to fix an injection molded insert, we mount on the cover (6) of the mold a block (2) provided with one or more supports (4), we adapt to the end of these supports attachments (5 ) intended to fix the said injection molded insert and make La même matière que Ladite matière principaLe, de manière que Lesdites attaches soient incorporées aThe same material as said main material, so that said fasteners are incorporated L'objet mouLé Lors de La rotation, puis, après Le mouLage, on retire du moule Le bLoc avec Le couvercle. The object molded During rotation, then, after molding, the bLoc with the cover is removed from the mold.
FR9008965A 1989-07-18 1990-07-13 ROTATION HOLLOW MOLDED OBJECT AND MANUFACTURING METHOD THEREOF Expired - Fee Related FR2649930B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18561889A JPH0349910A (en) 1989-07-18 1989-07-18 Rotation molding method and molded product thereof

Publications (2)

Publication Number Publication Date
FR2649930A1 true FR2649930A1 (en) 1991-01-25
FR2649930B1 FR2649930B1 (en) 1994-05-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9008965A Expired - Fee Related FR2649930B1 (en) 1989-07-18 1990-07-13 ROTATION HOLLOW MOLDED OBJECT AND MANUFACTURING METHOD THEREOF

Country Status (2)

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JP (1) JPH0349910A (en)
FR (1) FR2649930B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2136432A (en) * 1935-03-04 1938-11-15 Toyers Of Summit Inc Apparatus for molding
US3364292A (en) * 1958-05-05 1968-01-16 Jerome H. Lemelson Method of positioning and molding a preform integral with plastic material by rotational casting
US3965234A (en) * 1973-02-01 1976-06-22 Lane Jr Noel W Method of making radar reflective buoy
GB1535044A (en) * 1976-04-28 1978-12-06 Lesney Products Co Ltd Methods of making gripping hands for dolls
US4489028A (en) * 1982-11-22 1984-12-18 Masters William E Kayak improvements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2136432A (en) * 1935-03-04 1938-11-15 Toyers Of Summit Inc Apparatus for molding
US3364292A (en) * 1958-05-05 1968-01-16 Jerome H. Lemelson Method of positioning and molding a preform integral with plastic material by rotational casting
US3965234A (en) * 1973-02-01 1976-06-22 Lane Jr Noel W Method of making radar reflective buoy
GB1535044A (en) * 1976-04-28 1978-12-06 Lesney Products Co Ltd Methods of making gripping hands for dolls
US4489028A (en) * 1982-11-22 1984-12-18 Masters William E Kayak improvements

Also Published As

Publication number Publication date
JPH0349910A (en) 1991-03-04
FR2649930B1 (en) 1994-05-13

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