FR2600586A2 - Process enabling large-sized plastic components to be produced - Google Patents

Process enabling large-sized plastic components to be produced Download PDF

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Publication number
FR2600586A2
FR2600586A2 FR8608307A FR8608307A FR2600586A2 FR 2600586 A2 FR2600586 A2 FR 2600586A2 FR 8608307 A FR8608307 A FR 8608307A FR 8608307 A FR8608307 A FR 8608307A FR 2600586 A2 FR2600586 A2 FR 2600586A2
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FR
France
Prior art keywords
mould
temperature
pressure
materials
mold
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
FR8608307A
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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.)
MAISSIAT JEAN YVES
Original Assignee
MAISSIAT JEAN YVES
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 MAISSIAT JEAN YVES filed Critical MAISSIAT JEAN YVES
Priority to FR8608307A priority Critical patent/FR2600586A2/en
Priority to EP86401512A priority patent/EP0210906A1/en
Priority to AU61287/86A priority patent/AU6128786A/en
Priority to PCT/FR1986/000239 priority patent/WO1987000483A1/en
Publication of FR2600586A2 publication Critical patent/FR2600586A2/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/13—Injection moulding apparatus using two or more injection units co-operating with a single mould
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/57—Exerting after-pressure on the moulding material

Abstract

The process according to the main patent application consists in filling a mould 9 with thermoplastic materials, the walls 5 of the mould cavity 7 of which will be at a temperature which will lie within the working temperature range of the material. Next, as soon as the mould cavity 7 is uniformly filled, it is necessary, at various locations determined according to a thickness/surface area ratio of the mould cavity 7, to apply a compacting and a holding pressure which begins with the cooling of the walls 5 of the mould 9 and which, in the optimum case, will be the application of a pressure-volume-temperature diagram. According to the invention, the front portion of the filling devices are equipped with a closure system. The materials which constitute the mould are thermal conductors. The zones for surface/mould contact with the pressure-holding devices are temperature regulated independently of the surfaces of the mould cavity. After demoulding, the product obtained therefore has the same technical characteristics as a small-sized component of the same material obtained by conventional injection. Dispensing with injection pressures leads to dispensing with the locking mechanism conventionally used. The use of the process therefore enables thermoplastic components to be designed which were hitherto unrealisable. The process may also be used in the case of certain themosetting materials which are converted in the same manner as thermoplastic materials.

Description

LE PRESENT CERTIFICAT D'ADDITION CONCERNE DES AMELIORATIONS AU PROCEDE
PERMETTANT DE REALISER DES PIECES DE GRANDES DIMENSIONS EN MATIERES
PLASTIQUES, numéro : 85 11 413
La partie avant ou le nez du ou des dispositifs de gavage ou la ou les parties du moule recevant ces dispositifs sont équipés d'obturateurs à boisseau ou de tout autre type de système de fermeture; conçus de telle façon que lorsque le gavage est effectué et que le compactage et le maintien en pression commencent, la matière ne soit pas refoulée dans le ou les dispositifs de gavage.THIS ADDITION CERTIFICATE CONCERNS IMPROVEMENTS TO THE PROCESS
ALLOWING TO MAKE PARTS OF LARGE DIMENSIONS IN MATERIALS
PLASTICS, number: 85 11 413
The front part or the nose of the booster device (s) or the part (s) of the mold receiving these devices are fitted with plugs or any other type of closure system; designed in such a way that when the force-feeding is carried out and the compaction and maintenance of pressure begin, the material is not discharged into the force-feeding device (s).

Les matériaux qui constituent le moule sont des conducteurs thermiques qui peuvent être des alliages pour que les temps de chauffage et de refroidissement soient de très courtes durées; l'ensemble du moule y compris le système chauffage/refroidissement est calorifugé.The materials which constitute the mold are thermal conductors which can be alloys so that the heating and cooling times are very short; the entire mold including the heating / cooling system is insulated.

Les zones de contact surface/moule avec les dispositifs de compactage et maintien en pression sont régulés en température indépendemnent des surfaces de l'empreinte. Dans le cas des thermoplastiques, les zones de contact du moule avec les dispositifs qui effectuent le compactage et le maintien en pression au moment du refroidissement restent momentanément à la température de transformation de la matière utilisée, pendant que le reste des surfaces de l'empreinte est refroidie; ceci pour que le compactage et le maintien en pression soient le plus efficace possible, en agissant sur l'âme de la matière qui n'est pas encore solide. Ensuite, quand la quasi totalité de la pièce est refroidie ces zones sont elles aussi refroidies.The areas of surface / mold contact with the compacting and pressure maintenance devices are temperature controlled independently of the surfaces of the cavity. In the case of thermoplastics, the zones of contact of the mold with the devices which perform the compaction and the maintenance of pressure during cooling remain temporarily at the transformation temperature of the material used, while the rest of the surfaces of the imprint is cooled; this so that the compaction and the pressure maintenance are as efficient as possible, by acting on the core of the material which is not yet solid. Then, when almost the entire room is cooled, these areas are also cooled.

Pour l'utilisation des matières thermodurcissables qui se transforment traditionnellement par injection, les options de température ne sont pas les mêmes que celles choisies pour les thermoplastiques. Elles sont définies à partir de critères tels que : la taille de l'empreinte, le volume, l'épaisseur maximum, la surface, le temps de remplissage, le type de matière utilisée. For the use of thermosetting materials which are traditionally transformed by injection, the temperature options are not the same as those chosen for thermoplastics. They are defined on the basis of criteria such as: the size of the imprint, the volume, the maximum thickness, the surface, the filling time, the type of material used.

Dans tous les cas, la plage de température sera d'environ 600 C à 1500 C maximum. In all cases, the temperature range will be approximately 600 C to 1500 C maximum.

Claims (4)

REVENDICATIONS 1. Procédé permettant la réalisation de pièces de grandes et de très grandes dimensions en matières thermoplastiques; il consiste à gaver un moule à l'aide d'extrudeuses , ensuite à appliquer, en différents endroits déterminés suivant un rapport épaisseur/surface, un compactage et une pression de maintien qui sont appliqués à l'aide de groupes vis-pistons , débutant avec le refroidissement des surfaces de l'empreinte. Les parois de l'empreinte avant le gavage sont à une température comprise dans la fourchette de température de travail de la matière et que le compactage et le maintien en pression sont l'application d'un diagramme pression/volume/température.  1. Method for producing large and very large parts made of thermoplastic materials; it consists of stuffing a mold using extruders, then applying, in different locations determined according to a thickness / surface ratio, a compaction and a holding pressure which are applied using screw-piston groups, starting with the cooling of the footprint surfaces. The walls of the cavity before the feeding are at a temperature included in the working temperature range of the material and that the compaction and the maintenance of pressure are the application of a pressure / volume / temperature diagram. Caractérisé en ce que la partie avant ou le nez du ou des dispositifs de gavage ou la ou les parties du moule recevant ces dispositifs sont équipés d'obturateurs à boisseau ou de tout autre type de système de fermeture.Characterized in that the front part or the nose of the feeding device (s) or the part (s) of the mold receiving these devices are fitted with plugs or any other type of closure system. 2. Procédé selon la revendication 1, caractérisé en ce que les matériaux qui constituent le moule sont des conducteurs thermiques qui peuvent être des alliages. 2. Method according to claim 1, characterized in that the materials which constitute the mold are thermal conductors which can be alloys. 3. Procédé selon la revendication 1., caractérisé en ce que les zones de contact surface/moule avec les dispositifs de compactage et maintien en pression sont régulés en température indépendamment des surfaces de l'empreinte. 3. Method according to claim 1., characterized in that the areas of surface / mold contact with the compacting and pressure-maintaining devices are regulated in temperature independently of the surfaces of the imprint. 4. Procédé selon la revendication 1, pour l'utilisation des matières thermodurcissables qui se transforment traditionnellement par injection, les options de température ne sont pas les mêmes que celles choisies pour les thermoplastiques. Caractérisé en ce que les températures sont définies à partir des critères tels que : la taille de l'empreinte, le volume, l'épaisseur maximum, la surface, le temps de remplissage, le type de matière utilisée. Dans tous les cas, la plage de température sera d'environ 600 C à 1500 C maximum.  4. Method according to claim 1, for the use of thermosetting materials which are traditionally transformed by injection, the temperature options are not the same as those chosen for thermoplastics. Characterized in that the temperatures are defined on the basis of criteria such as: the size of the imprint, the volume, the maximum thickness, the surface, the filling time, the type of material used. In all cases, the temperature range will be approximately 600 C to 1500 C maximum.
FR8608307A 1985-07-19 1986-06-03 Process enabling large-sized plastic components to be produced Pending FR2600586A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8608307A FR2600586A2 (en) 1986-06-03 1986-06-03 Process enabling large-sized plastic components to be produced
EP86401512A EP0210906A1 (en) 1985-07-19 1986-07-01 Method for manufacturing plastics parts with great dimensions
AU61287/86A AU6128786A (en) 1985-07-19 1986-07-04 Method for making large sized plastic parts
PCT/FR1986/000239 WO1987000483A1 (en) 1985-07-19 1986-07-04 Method for making large sized plastic parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8608307A FR2600586A2 (en) 1986-06-03 1986-06-03 Process enabling large-sized plastic components to be produced

Publications (1)

Publication Number Publication Date
FR2600586A2 true FR2600586A2 (en) 1987-12-31

Family

ID=9336145

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8608307A Pending FR2600586A2 (en) 1985-07-19 1986-06-03 Process enabling large-sized plastic components to be produced

Country Status (1)

Country Link
FR (1) FR2600586A2 (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781547A (en) * 1951-12-26 1957-02-19 Honeywell Regulator Co Molding procedure and apparatus
US2840856A (en) * 1952-10-18 1958-07-01 Honeywell Regulator Co Molding apparatus and procedure
GB912695A (en) * 1960-01-07 1962-12-12 Fischer Ag Georg Improvements in or relating to methods of and devices for maintaining the follow-up pressure in injection moulds
FR1432150A (en) * 1965-04-23 1966-03-18 Installation-transfer, in particular automatic turntable, for working with thermoplastics and rubber
GB1023888A (en) * 1962-11-19 1966-03-30 Meiki Seisakusho Kk A method of injection molding rubber or similar material and apparatus therefor
US3265797A (en) * 1962-08-30 1966-08-09 Grace W R & Co Method of injection molding solid heavy section
FR1473150A (en) * 1967-06-01
US3571856A (en) * 1969-05-14 1971-03-23 Bischoff Chemical Corp Apparatus for simultaneously opening valves for plurality of injection nozzles
FR2141919A1 (en) * 1971-06-14 1973-01-26 Hanning Robert
DE2321634A1 (en) * 1973-04-28 1974-11-14 Vowinckel Fa Joh J PROCESS FOR MANUFACTURING THICK-WALLED PANELS FROM A POLYOLEFIN
DE2331426A1 (en) * 1973-06-20 1975-01-16 Fanini S I M S P A Large area thermoplastics moulded without pressure - by preheating mould, injecting, cooling and expelling coolant
DE2513594A1 (en) * 1975-03-27 1976-10-07 Schloemann Siemag Ag Mould for prodn. of sprue flash-free mouldings - from propellant contg. thermoplastics, with three movable mould platens
EP0022009A1 (en) * 1979-06-26 1981-01-07 Societe dite : SOCIETE LYONNAISE DE VENTILATION INDUSTRIELLE SOLYVENT-VENTEC Mould assembly for moulding elastomers

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1473150A (en) * 1967-06-01
US2781547A (en) * 1951-12-26 1957-02-19 Honeywell Regulator Co Molding procedure and apparatus
US2840856A (en) * 1952-10-18 1958-07-01 Honeywell Regulator Co Molding apparatus and procedure
GB912695A (en) * 1960-01-07 1962-12-12 Fischer Ag Georg Improvements in or relating to methods of and devices for maintaining the follow-up pressure in injection moulds
US3265797A (en) * 1962-08-30 1966-08-09 Grace W R & Co Method of injection molding solid heavy section
GB1023888A (en) * 1962-11-19 1966-03-30 Meiki Seisakusho Kk A method of injection molding rubber or similar material and apparatus therefor
FR1432150A (en) * 1965-04-23 1966-03-18 Installation-transfer, in particular automatic turntable, for working with thermoplastics and rubber
US3571856A (en) * 1969-05-14 1971-03-23 Bischoff Chemical Corp Apparatus for simultaneously opening valves for plurality of injection nozzles
FR2141919A1 (en) * 1971-06-14 1973-01-26 Hanning Robert
DE2321634A1 (en) * 1973-04-28 1974-11-14 Vowinckel Fa Joh J PROCESS FOR MANUFACTURING THICK-WALLED PANELS FROM A POLYOLEFIN
DE2331426A1 (en) * 1973-06-20 1975-01-16 Fanini S I M S P A Large area thermoplastics moulded without pressure - by preheating mould, injecting, cooling and expelling coolant
DE2513594A1 (en) * 1975-03-27 1976-10-07 Schloemann Siemag Ag Mould for prodn. of sprue flash-free mouldings - from propellant contg. thermoplastics, with three movable mould platens
EP0022009A1 (en) * 1979-06-26 1981-01-07 Societe dite : SOCIETE LYONNAISE DE VENTILATION INDUSTRIELLE SOLYVENT-VENTEC Mould assembly for moulding elastomers

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