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WO1989002816A1 - Installation for the treatment and direct transformation of thermoplastic waste into castings - Google Patents

Installation for the treatment and direct transformation of thermoplastic waste into castings Download PDF

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Publication number
WO1989002816A1
WO1989002816A1 PCT/BE1988/000025 BE8800025W WO8902816A1 WO 1989002816 A1 WO1989002816 A1 WO 1989002816A1 BE 8800025 W BE8800025 W BE 8800025W WO 8902816 A1 WO8902816 A1 WO 8902816A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
installation according
cylinder
carousel
extruder
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.)
Ceased
Application number
PCT/BE1988/000025
Other languages
French (fr)
Inventor
Philippe Julien
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.)
Advanced Recycling Technology Ltd
Advanced Recycling Technology
Original Assignee
Advanced Recycling Technology Ltd
Advanced Recycling Technology
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 Advanced Recycling Technology Ltd, Advanced Recycling Technology filed Critical Advanced Recycling Technology Ltd
Publication of WO1989002816A1 publication Critical patent/WO1989002816A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • 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
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/269—Extrusion in non-steady condition, e.g. start-up or shut-down
    • B29C48/2694—Intermittent extrusion
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/45—Axially movable screws
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92104—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to an installation for the direct processing and transformation of thermoplastic waste, "sorted or not, into pieces intended for construction, cast in molds, the material of which looks like wood but has a marked resistance higher, in which the wastes' finely ground, possibly with added certain additives and pigments, are homogenized in a vertical screw mixer, then discharged into an intermediate silo where they pass through a magnetic separation system before being transported by an endless screw in the hopper of a special adiabatic extruder with short and fast screw which transforms the material into a homogeneous plasticized mass which it pushes in the molds which are made from standard sections in hollow steel.
  • thermoplastic materials such as: polyethylene, polypropylene, polyvinyl chloride or mixture thereof is finely ground, stored and partially dried by the heat released during grinding. They are then introduced in the "Reverzer” unit which consists of a melting unit comprising a hopper where the material is softened and a mixer with worm where it is liquefied, before being injected under pressure into a closed mold. After cooling by spraying with water or air, the mold is opened and the part removed from the mold. Its shape is obviously a function of that of the mold. We can thus mold beams, profiles, etc.
  • Dutch patent application no . 7704265 dated 07/03/1978 by E. KLOBBIE covers a second process which allows the use of standard apparatus and molds which must not withstand high pressures.
  • the material is kept in the extruder until, under the effect of the temperature rise resulting from electric heating, it is completely fluidized and the granules of special additives at low vaporization temperature are completely gasified and that they generate an increase in pressure facilitating the expansion of the fluid material in the entire mold, one end of which is connected to the extruder and the other provided with a vent allowing the gases to escape.
  • This method enables to use any type 'Extruder trade, adiabatic or not, whose elements provided is removed to withstand high pressures (100 to 0 kg / cm 2) that is to say: the filter and the extrusion in ector.
  • the extruder is thus reduced to a worm conveyor and the molds can consist of simple standard tubes or profiles.
  • the granules of special additives must have a vaporization temperature lower than that reached in the extruder (from 150 to 27 ⁇ " C). Their percentage relative to the total weight of the mixture, determined by experience varies between 0.4 and 1.2% depending on the type of waste mixture thermoplastics and finished products to be molded. If a gas (nitrogen or air) is used, it is only introduced into the extruder when the thermoplastic material is completely liquefied. This process can be used with all unwashed thermoplastic waste containing up to 25% maximum of impurities, i.e. non-plastic materials.
  • FIG. 1A represents the entire installation in elevation and FIG. 1B the same assembly in plan.
  • Figure 2 shows the entire system of 1 extrusion in section.
  • Figure 3 schematically shows a mold in its carousel in the injection position.
  • FIG. 4 shows the entire mobile bridge in elevation equipped with its various cylinders.
  • FIG. 4A shows the holding and shearing cylinders.
  • FIG. 4B shows the central cylinder and the detection device.
  • FIG. 6 illustrates the device for receiving the molded part after demolding with details (Fig.ôA to 6D).
  • the entire installation illustrated in FIGS. 1 and 2 comprises a hopper 10 supplying thermoplastic waste to an extruder 12 of the standard type, without filter or injection nozzle, at the outlet of which the heated and homogenized material is brought to the fluid state by an extrusion screw 36, axially adjustable, in one of the ten molds 14, mounted horizontally in a carousel 16, placed in the chassis-tank 18, filled with water in forced circulation, formed by two circular plates 74,76 mounted on a partially toothed horizontal axis 78, driven by a device 20 which meshes on the toothed periphery of the plate 76, a bridge 22-, mounted astride the tank-chassis 18 movable along the vertical walls of the latter ci allowing to adjust the installation according to the length (from 1 to 4 meters) of the molds 14, a device 24 placed in the extension of the chassis-tank 18, facing the ejection position, collecting on all their length, at the other end of the installation, the molded parts, a hydraulic unit 26
  • the extruder 12 illustrated in detail in FIG. 2, comprises a hydraulic motor 30 driving through a box containing two half-couplings 32, 34, a very short and rapid extrusion screw 36 comprising three parts with different profiles intended to feed, compress and homogenize the material, housed in a cylinder 38 heated externally by electrical resistors 39, which can slide inside its hollow drive axis 40 under the action of an adjustment or support screw 42 controlled by a toothed wheel 44 mounted on the half-coupling motor side 32, which positions the screw extrusion 36 in its cylinder 38 so that the annular passage between the conical end 46 of the extrusion screw 36 and the conical nozzle 48, heated by an electrical resistance 51, is such that it generates the back pressure and the friction required so that the material, heated more or less long by the electrical resistances, leaves by the nozzle flange 50 at the desired temperature, depending on the material itself and the shape of the mold to be completely filled, the screw d 1 extrusion 6 having a practically adiabatic functioning.
  • FIG. 3 schematically illustrates a mold 14 in the upper filling position provided with its three circular flanges 49, 51 and 61 adjusted and precisely housed in the circular holes provided for this purpose in the plates 74, 76 serving to support the mold 14 in horizontal position in the carousel 16.
  • the flange 61 of smaller diameter, is pierced in its center with a vent 59 intended for the exhaust of gases during filling of the mold 14 and at the outlet of a material flow in end of operation.
  • a pneumatic cylinder 52 is used to ensure, during the entire filling phase, the perfect seal of the mold (14) on the extrusion screw side 36 by applying the flange 49 against the nozzle flange 0 under high pressure through the mold 14 and its flange 61.
  • the cylinder 52 pushes the flange 61, by means of a U-shaped head which does not block the vent 59, which is calibrated according to the dimensions and shapes of the mold 14 as well as the type of material in order to develop the interior of this mold 14 sufficient pressure to ensure its perfect filling.
  • a lever 53 placed at the outlet of the vent 59 detects the material outlet and by tilting stops the filling cycle allowing the engagement of the next cycle.
  • the distance between lever 53, vent 59 can be adjusted in order to delay more or less the stopping of the filling cycle and thus allow, if necessary, an increase in pressure in the mold 14 facilitating its complete filling.
  • the circular plate 7 is provided, on either side of each circular housing in which the flanges 51 are positioned with an elastic device constituted by two clamps 88 which can pivot around their axis and used to press the flange 49, by l 'intermediate the mold 14 and its flange 1, against the support disc 75 and thus ensure perfect sealing of the mold 14 on the injection side, after the filling station, otherwise the material, still hot and fluid at this stage, could partly be ejected outside the mold 14, under the pressure of gases or vapors which may still be dissolved therein.
  • an elastic device constituted by two clamps 88 which can pivot around their axis and used to press the flange 49, by l 'intermediate the mold 14 and its flange 1, against the support disc 75 and thus ensure perfect sealing of the mold 14 on the injection side, after the filling station, otherwise the material, still hot and fluid at this stage, could partly be ejected outside the mold 14, under the pressure of gases or vapors which may still be dissolved therein.
  • FIG. 4B illustrates in detail the bridge and its four pneumatic cylinders.
  • a central jack 5 shown in FIG. 4B serving to seal the mold 14 when it is filled, is provided with a device for detecting the exit of the material through the vent 59, a device consisting of a lever probe 53, adjustable on its axis 54, and which, by tilting, triggers a switch 55, 56 which stops the filling operation.
  • a holding cylinder 58 shown in FIG. 4A, seals the mold 14 after the filling operation by pressing the flange 49 against the support disc 75 via the mold 14 and its flange 1-
  • This device comprises " a second cylinder 60 controlling a knife 62 which automatically cuts, at the level of the flange 61, the material having flowed through the vent 59 at the end of the filling of the mold 14.
  • the assembly by cylinder 60 s' performs for example in second injection position, thus allowing a stabilization period for the previously molded part. The material then no longer works and in addition the cutting device can be adjusted with precision to cut the molded part in a stationary position.
  • An ejection cylinder 64 shown in FIG. 4C, "comprising a blowing head 66 provided with a seal 68, into which the compressed air is supplied by a pipe 70, at pressure and adjustable duration, in order to eject,
  • the mold holder carousel 16 illustrated in FIG. 5 comprises two circular plates 74, 76 mounted on an axis
  • -__ • horizontal 78, in the axis of the chassis-reservoir 18 supported at each end by a spherical bearing 80 taking up the radial loads (weight and driving torque) and the axial loads (pushing of the molds against the disc of support 75) the plate 76 toothed on its periphery, allowing the rotation of the 0 carousel under the action of the drive device 20, the other plate 74, movable on the threaded part of its support shaft 78 provided with a thread after loosening by rotation of the locking nut 86, makes it possible to adapt the installation to the length of the ten molds 14, the clamps 88 (see FIG. 3B)
  • FIGS. 6A, 6B, 6C and 6D illustrate in detail the device for receiving the part after demolding. It comprises a rectangular tube 94 with a tilting bottom 96 under

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The installation comprises an extruder (12) of which the extrusion screw (36) may be axially displaced, a number of moulds (14) arranged horizontally in a molding loop (16), of which a plate (74) may be displaced on its threaded axis (78), thereby bringing the moulds (14) into successive positions of filling, consolidation, cooling and mould removing. A material sensor (53) positioned at an adjustable distance from the rear end of the mould (14) can stop the filling cycle, elastic means (88) being provided for the sealing of the mould (14) after its filling and a device (94, 96) receiving the casting after unmoulding.

Description

DESCRIPTION DESCRIPTION

INSTALLATION DE TRAITEMENT ET DE TRANSFORMATION DIRECTE DE DECHETS THERMOPLASTIQUES EN PIECES MOULEESPLANT FOR PROCESSING AND DIRECT TRANSFORMATION OF THERMOPLASTIC WASTE INTO MOLDED PARTS

La présente invention est relative à une installation de traitement et de transformation directe de déchets thermoplastiques, "triés ou non, en pièces destinées à la construction, coulées dans des .moules, dont la matière à l'apparence du bois mais possède une résistance nettement supérieure, dans laquelle les déchets' broyés finement, additionnés éventuellement de certains additifs et pigments, sont homogénéisés dans un mélangeur vertical à vis puis déchargés dans un silo intermédiaire d'où ils passent au travers d'un système de séparation magnétique avant d'être transportés par une vis sans fin dans la trémie d'une extrudeuse spéciale adiabatique à vis courte et rapide qui transforme la matière en une masse homogène plastifiée qu'elle pousse dans les moules qui sont fabriqués à partir de sections standards en acier creux.The present invention relates to an installation for the direct processing and transformation of thermoplastic waste, "sorted or not, into pieces intended for construction, cast in molds, the material of which looks like wood but has a marked resistance higher, in which the wastes' finely ground, possibly with added certain additives and pigments, are homogenized in a vertical screw mixer, then discharged into an intermediate silo where they pass through a magnetic separation system before being transported by an endless screw in the hopper of a special adiabatic extruder with short and fast screw which transforms the material into a homogeneous plasticized mass which it pushes in the molds which are made from standard sections in hollow steel.

Un premier procédé appelé "Reverzer" , détaillé dans une brochure de la Compagnie japonaise Mitsubishi Petrochemical, est mentionné dans "Japan Plastic Age" Vol. 12 de février 197 . pages 3 à 52. Dans ce procédé les déchets, triés ou non, de matériaux thermoplastiques tels que : polyéthylène, polypropylène, chlorure de polyvinyl ou mélange de ceux-ci sont finement broyés, stockés et partiellement séchés par la chaleur dégagée lors_ broyage. Ils sont ensuite introduits dans l'unité "Reverzer" qui consiste en une unité de fusion comportant une trémie où le matériau est ramolli et un mélangeur avec vis sans fin où il est liquéfié, avant d'être injecté sous pression dans un moule fermé. Après refroidissement par arrosage à l'eau ou à l'air, le moule est ouvert et la pièce démoulée. Sa forme est évidemment fonction de celle du moule. On peut ainsi mouler des poutres, des profilés etc..A first process called "Reverzer", detailed in a brochure of the Japanese Company Mitsubishi Petrochemical, is mentioned in "Japan Plastic Age" Vol. 12 of February 197. pages 3 to 52. In this process the waste, sorted or not, of thermoplastic materials such as: polyethylene, polypropylene, polyvinyl chloride or mixture thereof is finely ground, stored and partially dried by the heat released during grinding. They are then introduced in the "Reverzer" unit which consists of a melting unit comprising a hopper where the material is softened and a mixer with worm where it is liquefied, before being injected under pressure into a closed mold. After cooling by spraying with water or air, the mold is opened and the part removed from the mold. Its shape is obviously a function of that of the mold. We can thus mold beams, profiles, etc.

Dans ce procédé de hautes pressions sont engendrées lors des opérations de mélange et de liquéfaction. L'appareillage et les moules utilisés doivent évidemment être conçus pour résister à de telles pressions.In this process, high pressures are generated during mixing and liquefaction operations. The apparatus and the molds used must obviously be designed to withstand such pressures.

La demande de brevet néerlandais n° 7704265 datée du 07/03/1978 de E. KLOBBIE, couvre un deuxième procédé qui permet d'utiliser un appareillage et des moules standards ne devant pas résister à de hautes pressions. Le matériau est maintenu dans l'extrudeuse jusqu'à ce que, sous l'effet de l'élévation de température résultant du chauffage électrique, il soit complètement fluidifié et que les granulés d'additifs spéciaux à basse température de vaporisation soient complètement gazéifiés et qu'ils engendrent une augmentation de la pression facilitant 1'expansion du matériau fluide dans 1'entièreté du moule dont une extrémité est raccordée à 1*extrudeuse et l'autre pourvue d'un évent permettant aux gaz de s'échapper.Dutch patent application no . 7704265 dated 07/03/1978 by E. KLOBBIE covers a second process which allows the use of standard apparatus and molds which must not withstand high pressures. The material is kept in the extruder until, under the effect of the temperature rise resulting from electric heating, it is completely fluidized and the granules of special additives at low vaporization temperature are completely gasified and that they generate an increase in pressure facilitating the expansion of the fluid material in the entire mold, one end of which is connected to the extruder and the other provided with a vent allowing the gases to escape.

Ce procédé permet d'utiliser n'importe quel type ' d'extrudeuse du commerce, adiabatique ou non, dont on enlève les éléments prévus pour résister aux pressions élevées (100 à 0 kg/cm2) c'est-à-dire : le filtre et l'in ecteur d'extrusion. L'extrudeuse est ainsi réduite à un convoyeur à vis sans fin et les moules peuvent consister en de simples tubes ou profilés standards.This method enables to use any type 'Extruder trade, adiabatic or not, whose elements provided is removed to withstand high pressures (100 to 0 kg / cm 2) that is to say: the filter and the extrusion in ector. The extruder is thus reduced to a worm conveyor and the molds can consist of simple standard tubes or profiles.

Les granulés d'additifs spéciaux doivent avoir une température de vaporisation inférieure à celle atteinte dans 1'extrudeuse (de 150 à 27θ"C). Leur pourcentage par rapport au poids total du mélange, déterminé par l'expérience oscille entre 0,4 et 1,2% en fonction du type de mélange de déchets thermoplastiques et des produits finis à mouler. Si on utilise un gaz (azote ou air) il n'est introduit dans l'extrudeuse que lorsque le matériau thermoplastique est complètement liquéfié. Ce procédé peut être utilisé avec tous les déchets thermoplastiques non lavés contenant jusqu'à 25% maximum d'impuretés c'est-à-dire de matériaux non plastiques.The granules of special additives must have a vaporization temperature lower than that reached in the extruder (from 150 to 27θ " C). Their percentage relative to the total weight of the mixture, determined by experience varies between 0.4 and 1.2% depending on the type of waste mixture thermoplastics and finished products to be molded. If a gas (nitrogen or air) is used, it is only introduced into the extruder when the thermoplastic material is completely liquefied. This process can be used with all unwashed thermoplastic waste containing up to 25% maximum of impurities, i.e. non-plastic materials.

La présente invention a pour objectif de remédier aux désavantages des procédés existants à savoir : coût de l'installation et des moules devant résister à des pressions plus ou moins élevées, et remplissage incomplet de ces moules par certains types de mélanges thermoplastiques et pour certaines formes de moules plus élaborées et ce malgré l'utilisation d'agents gazéifiants. Pour ce faire l'extrudeuse utilisée est du type standard, sans filtre ni ajutage d'injection, le mélange ne nécessitant pas l'ajoute d'un additif gazéifiant, les moules ouverts aux deux extrémités pouvant être fabriqués à partir de simples tubes ou profilés standards, la pression d'injection requise étant réglable par le déplacement axial de la vis d'extrusion. D'autres caractéristiques de l'invention sont reprises dans les revendications de la présente demande. On en décrira ci-après un exemple de réalisation en se référant aux dessins suivants : - l figure 1A représente l'ensemble de l'installation en élévation et la figure 1B le même ensemble en plan. la figure 2 représente l'ensemble du système d1extrusion en coupe. - la figure 3 représente schématiquement un moule dans son carrousel en position d'injection.The present invention aims to remedy the disadvantages of existing processes, namely: cost of installation and molds having to withstand higher or lower pressures, and incomplete filling of these molds with certain types of thermoplastic mixtures and for certain forms more elaborate molds despite the use of carbonating agents. To do this, the extruder used is of the standard type, without filter or injection nozzle, the mixture not requiring the addition of a gasifying additive, the molds open at both ends can be made from simple tubes or profiles. standard, the required injection pressure being adjustable by the axial displacement of the extrusion screw. Other features of the invention are included in the claims of the present application. An exemplary embodiment will be described below with reference to the following drawings: FIG. 1A represents the entire installation in elevation and FIG. 1B the same assembly in plan. Figure 2 shows the entire system of 1 extrusion in section. - Figure 3 schematically shows a mold in its carousel in the injection position.

- la figure 4 représente l'ensemble du pont mobile en élévation équipé de ses différents vérins.- Figure 4 shows the entire mobile bridge in elevation equipped with its various cylinders.

- la figure 4A représente les vérins de maintien et de cisaillement. - la figure 4B représente le vérin central et le dispositif de détection.- Figure 4A shows the holding and shearing cylinders. - Figure 4B shows the central cylinder and the detection device.

- la figure 4C représente le vérin d'éjection.- Figure 4C shows the ejection cylinder.

- la figure illustre en coupe le carrousel et ses différents constituants ainsi que le système de clames assurant l'étanchéitê du moule après son remplissage.- The figure illustrates in section the carousel and its various constituents as well as the system of clamps ensuring the sealing of the mold after its filling.

- la figure 6 illustre le dispositif de réception de la pièce moulée après démoulage avec détails (Fig.ôA à 6D).- Figure 6 illustrates the device for receiving the molded part after demolding with details (Fig.ôA to 6D).

L'ensemble de l'installation illustrée aux figures 1 et 2, comporte une trémie 10 alimentant en déchets thermoplastiques une extrudeuse 12 du type standard, sans filtre ni ajutage d'injection, à la sortie de laquelle la matière chauffée et homogénéisée est amenée à l'état fluide par une vis d'extrusion 36, réglable axialement, dans un des dix moules 14, montés horizontalement dans un carrousel 16, placé dans le châssis-réservoir 18, rempli d'eau en circulation forcée, formé par deux plateaux circulaires 74,76 montés sur un axe horizontal partiellement denté 78, entraîné par un dispositif 20 qui engrène sur le pourtour denté du plateau 76, un pont 22-, monté à cheval sur le châssis-réservoir 18 mobile le long des parois verticales de celui-ci permettant de régler l'installation suivant la longueur (de 1 à 4 mètres) des moules 14, un dispositif 24 placé dans le prolongement du châssis-réservoir 18, face à la position d'éjection, recueillant sur toute leur longueur, à l'autre extrémité de l'installation, les pièces démoulées, un groupe hydraulique 26 alimentant les moteurs hydrauliques de l'extrudeuse et une armoire électrique 28, les différents composants électriques.The entire installation illustrated in FIGS. 1 and 2 comprises a hopper 10 supplying thermoplastic waste to an extruder 12 of the standard type, without filter or injection nozzle, at the outlet of which the heated and homogenized material is brought to the fluid state by an extrusion screw 36, axially adjustable, in one of the ten molds 14, mounted horizontally in a carousel 16, placed in the chassis-tank 18, filled with water in forced circulation, formed by two circular plates 74,76 mounted on a partially toothed horizontal axis 78, driven by a device 20 which meshes on the toothed periphery of the plate 76, a bridge 22-, mounted astride the tank-chassis 18 movable along the vertical walls of the latter ci allowing to adjust the installation according to the length (from 1 to 4 meters) of the molds 14, a device 24 placed in the extension of the chassis-tank 18, facing the ejection position, collecting on all their length, at the other end of the installation, the molded parts, a hydraulic unit 26 supplying the hydraulic motors of the extruder and an electrical cabinet 28, the various electrical components.

L'extrudeuse 12, illustrée en détail à la figure 2, comporte un moteur hydraulique 30 entraînant au travers d'une boîte renfermant deux demi-accouplements 32,34, une vis d'extrusion 36 très courte et rapide comportant trois parties aux profils différents destinées à alimenter, comprimer et homogénéiser la matière, logée dans un cylindre 38 chauffé extérieurement par des résistances électriques 39, pouvant coulisser à l'intérieur de son axe creux d'entraînement 40 sous l'action d'une vis de réglage ou d'appui 42 commandée par une roue dentée 44 montée sur le demi-accouplement côté moteur 32, qui positionne la vis d'extrusion 36 dans son cylindre 38 afin que le passage annulaire entre l'extrémité conique 46 de la vis d'extrusion 36 et l'ajutage conique 48, chauffé par une résistance électrique 51, soit tel qu'il engendre la contre-pression et les frottements requis pour que la matière, chauffée plus ou moins longtemps par les résistances électriques, sorte par le flasque d'ajutage 50 à la température souhaitée, fonction de la matière elle-même et de la forme du moule à remplir complètement, la vis d1extrusion 6 ayant un fonctionnement pratiquement adiabatique.The extruder 12, illustrated in detail in FIG. 2, comprises a hydraulic motor 30 driving through a box containing two half-couplings 32, 34, a very short and rapid extrusion screw 36 comprising three parts with different profiles intended to feed, compress and homogenize the material, housed in a cylinder 38 heated externally by electrical resistors 39, which can slide inside its hollow drive axis 40 under the action of an adjustment or support screw 42 controlled by a toothed wheel 44 mounted on the half-coupling motor side 32, which positions the screw extrusion 36 in its cylinder 38 so that the annular passage between the conical end 46 of the extrusion screw 36 and the conical nozzle 48, heated by an electrical resistance 51, is such that it generates the back pressure and the friction required so that the material, heated more or less long by the electrical resistances, leaves by the nozzle flange 50 at the desired temperature, depending on the material itself and the shape of the mold to be completely filled, the screw d 1 extrusion 6 having a practically adiabatic functioning.

La figure 3 illustre schématiquement un moule 14 en position supérieure de remplissage pourvue de ses trois brides circulaires 49, 51 et 61 ajustées et logées avec précision dans les trous circulaires prévus à cet effet dans les plateaux 74, 76 servant à supporter le moule 14 en position horizontale dans le carrousel 16. La bride 61, de diamètre plus petit, est percée en son centre d'un évent 59 destiné à l'échappement des gaz lors du remplissage du moule 14 et à la sortie d'une coulée de matière en fin d'opération.FIG. 3 schematically illustrates a mold 14 in the upper filling position provided with its three circular flanges 49, 51 and 61 adjusted and precisely housed in the circular holes provided for this purpose in the plates 74, 76 serving to support the mold 14 in horizontal position in the carousel 16. The flange 61, of smaller diameter, is pierced in its center with a vent 59 intended for the exhaust of gases during filling of the mold 14 and at the outlet of a material flow in end of operation.

Un vérin pneumatique 52 sert à assurer, pendant toute la phase de remplissage, l'étanchéité parfaite du moule (14) côté vis d'extrusion 36 en appliquant sous haute pression la bride 49 contre le flasque d'ajutage 0 par l'intermédiaire du moule 14 et de sa bride 61.A pneumatic cylinder 52 is used to ensure, during the entire filling phase, the perfect seal of the mold (14) on the extrusion screw side 36 by applying the flange 49 against the nozzle flange 0 under high pressure through the mold 14 and its flange 61.

Le vérin 52 pousse la bride 61, par l'intermédiaire d'une tête en U n'obturant pas l'évent 59, qui est calibré en fonction des dimensions et des formes du moule 14 ainsi que du type de matière afin de développer à l'intérieur de ce moule 14 une pression suffisante pour assurer son parfait remplissage. Un levier 53 placé à la sortie de l'évent 59 détecte la sortie de matière et en basculant arrête le cycle de remplissage permettant l'enclenchement du cycle suivant. La distance levier 53, évent 59 peut être réglée afin de retarder plus ou moins l'arrêt du cycle de remplissage et permettre ainsi, si nécessaire, une augmentation de pression dans le moule 14 facilitant son remplissage complet.The cylinder 52 pushes the flange 61, by means of a U-shaped head which does not block the vent 59, which is calibrated according to the dimensions and shapes of the mold 14 as well as the type of material in order to develop the interior of this mold 14 sufficient pressure to ensure its perfect filling. A lever 53 placed at the outlet of the vent 59 detects the material outlet and by tilting stops the filling cycle allowing the engagement of the next cycle. The distance between lever 53, vent 59 can be adjusted in order to delay more or less the stopping of the filling cycle and thus allow, if necessary, an increase in pressure in the mold 14 facilitating its complete filling.

Le plateau circulaire 7 est muni, de part et d'autre de chaque logement circulaire dans lequel sont positionnées les brides 51 d'un dispositif élastique constitués par deux clames 88 pouvant pivoter autour de leur axe et servant à presser la bride 49, par l'intermédiaire du moule 14 et de sa bride 1, contre le disque d'appui 75 et assurer ainsi l'étanchéité parfaite du moule 14 du côté injection, après la station de remplissage, sinon la matière, encore chaude et fluide à ce stade, pourrait en partie être éjectée en dehors du moule 14, sous la pression de gaz ou vapeurs encore éventuellement dissous dans celle-ci.The circular plate 7 is provided, on either side of each circular housing in which the flanges 51 are positioned with an elastic device constituted by two clamps 88 which can pivot around their axis and used to press the flange 49, by l 'intermediate the mold 14 and its flange 1, against the support disc 75 and thus ensure perfect sealing of the mold 14 on the injection side, after the filling station, otherwise the material, still hot and fluid at this stage, could partly be ejected outside the mold 14, under the pressure of gases or vapors which may still be dissolved therein.

Les figures 4, 4A, 4B et 4C illustrent en détail le pont et ses quatre vérins pneumatiques. Un vérin central 5 représenté à la figure 4B, servant à assurer l'étanchéité du moule 14 lors de son remplissage, est muni d'un dispositif de détection, de la sortie de la matière par l'évent 59, dispositif consistant en un levier palpeur 53, réglable sur son axe 54, et qui en basculant déclenche un interrupteur 55, 56 qui arrête l'opération de remplissage.Figures 4, 4A, 4B and 4C illustrate in detail the bridge and its four pneumatic cylinders. A central jack 5 shown in FIG. 4B, serving to seal the mold 14 when it is filled, is provided with a device for detecting the exit of the material through the vent 59, a device consisting of a lever probe 53, adjustable on its axis 54, and which, by tilting, triggers a switch 55, 56 which stops the filling operation.

Un vérin de maintien 58, représenté à la figure 4A, assure l'étanchéité du moule 14 après l'opération de remplissage en pressant contre le disque d'appui 75 la bride 49 par l'intermédiaire du moule 14 et de sa bride 1- Ce dispositif comporte" un deuxième vérin 60 commandant un couteau 62 qui sectionne automatiquement, au raz de la bride 61, la matière ayant coulé au travers de l'évent 59 à la fin du remplissage du moule 14. La cnupe par vérin 60 s'effectue par exemple en deuxième position d'injection, permettant ainsi une période de stabilisation à la pièce moulée préalablement. La matière alors ne travaille plus et en plus le dispositif de coupage peut être réglé avec précision pour couper en position immobile 5 la pièce moulée.A holding cylinder 58, shown in FIG. 4A, seals the mold 14 after the filling operation by pressing the flange 49 against the support disc 75 via the mold 14 and its flange 1- This device comprises " a second cylinder 60 controlling a knife 62 which automatically cuts, at the level of the flange 61, the material having flowed through the vent 59 at the end of the filling of the mold 14. The assembly by cylinder 60 s' performs for example in second injection position, thus allowing a stabilization period for the previously molded part. The material then no longer works and in addition the cutting device can be adjusted with precision to cut the molded part in a stationary position.

Un vérin d'éjection 64, représenté à la figure 4C," comportant une tête de soufflage 66 munie d'un joint d'étanchéité 68, dans laquelle l'air comprimé est amené par une conduite 70, à pression et durée réglable, afin d'éjecter,An ejection cylinder 64, shown in FIG. 4C, "comprising a blowing head 66 provided with a seal 68, into which the compressed air is supplied by a pipe 70, at pressure and adjustable duration, in order to eject,

10 à la dernière station, la pièce moulée, qui s'est progressivement contractée en se refroidissant dans l'eau du châssis-réservoir 18.10 at the last station, the molded part, which has contracted progressively as it cooled in the water of the tank chassis 18.

Le carrousel porte-moules 16 illustré à la figure 5 comporte deux plateaux circulaires 74, 76 montés sur un axeThe mold holder carousel 16 illustrated in FIG. 5 comprises two circular plates 74, 76 mounted on an axis

-__•= horizontal 78, dans l'axe du châssis-réservoir 18 supporté à chaque extrémité par un palier sphérique 80 reprenant les charges radiales (poids et couple d'entraînement) et les charges axiales (poussée des moules contre le disque d'appui 75) le plateau 76 denté sur son pourtour, permettant la rotation du 0 carrousel sous l'action du dispositif d'entraînement 20, l'autre plateau 74, déplaçable sur la partie filetée de son arbre support 78 muni d'un filetage après desserrage par rotation de l'écrou de blocage 86, permet d'adapter l'installation à la longueur des dix moules 14, les clames 88 (voir figure 3B)-__ • = horizontal 78, in the axis of the chassis-reservoir 18 supported at each end by a spherical bearing 80 taking up the radial loads (weight and driving torque) and the axial loads (pushing of the molds against the disc of support 75) the plate 76 toothed on its periphery, allowing the rotation of the 0 carousel under the action of the drive device 20, the other plate 74, movable on the threaded part of its support shaft 78 provided with a thread after loosening by rotation of the locking nut 86, makes it possible to adapt the installation to the length of the ten molds 14, the clamps 88 (see FIG. 3B)

25 montées de part et d'autre de chaque logement périphérique du plateau 74 assurant l'étanchéité parfaite entre la bride 49 du moule 14 et le disque d'appui 75, la pression qu'elles exercent étant réglable de trois façons : par serrage progressif de la vis 90, par augmentation du nombre de rondelles-ressorts25 mounted on either side of each peripheral housing of the plate 74 ensuring perfect sealing between the flange 49 of the mold 14 and the support disc 75, the pressure which they exert being adjustable in three ways: by progressive tightening of screw 90, by increasing the number of spring washers

30 92 ou par utilisation d'un autre type de rondelles-ressorts 92.30 92 or by using another type of spring washer 92.

Les figures 6A, 6B, 6C et 6D illustrent en détail le dispositif de réception de la pièce après démoulage. Il comporte un tube rectangulaire 94 à fond basculant 96 sousFIGS. 6A, 6B, 6C and 6D illustrate in detail the device for receiving the part after demolding. It comprises a rectangular tube 94 with a tilting bottom 96 under

35 l'action d'un vérin 104. Lorsque la pièce est chassée pneumatiquement de son moule elle glisse sur le fond 96 et vient éventuellement heurter l'amortisseur 98 monté à l'extrémité du tube rectangulaire 94. Dans sa course elle coupe le faisceau de la cellule photo-électrique 100, 102 ce qui enclenche le cycle suivant après le passage du produit extrudé. 35 the action of a jack 104. When the part is driven out pneumatically from its mold, it slides on the bottom 96 and possibly strikes the shock absorber 98 mounted at the end of the rectangular tube 94. In its course it cuts the beam of the photoelectric cell 100, 102 which starts the next cycle after the passage of the extruded product.

Claims

REVENDICATIONS 1. Installation de traitement et de transformation directe de déchets thermoplastiques en pièces moulées comportant une trémie (10) et une extrudeuse à vis (12), alimentant ' successivement en matière plastique fluidifiée une série de moules (14), ouverts aux deux extrémités, disposés horizontalement dans un carrousel (16), placé dans un châssis-réservoir (18) rempli d'eau, un dispositif de commande (20) entraînant le carrousel (16), en rotation automatique, pas à pas, amenant un moule (14) de la position de remplissage à celle de consolidation, puis aux différentes positions de refroidissement dans l'eau et finalement à la position de démoulage, caractérisée en ce que l'extrudeuse (12) est munie d'une vis d'extrusion (36) pouvant être déplacée suivant son axe longitudinal à l'intérieur de son cylindre creux (40) de telle sorte que le passage annulaire entre l'extrémité conique (46) de la vis d'extrusion (36) et l'ajutage conique (48) engendre la contre-pression requise pour que la matière sorte par le flasque d'ajutage (50) à la température souhaitée.1. Processing plant direct transformation of waste thermoplastic moldings comprising a hopper (10) and a screw extruder (12), supplying plastic material in fluidized successively a series of molds (14), open at both ends, arranged horizontally in a carousel (16), placed in a tank chassis (18) filled with water, a control device (20) driving the carousel (16), in automatic rotation, step by step, bringing a mold (14 ) from the filling position to that of consolidation, then to the different cooling positions in water and finally to the demolding position, characterized in that the extruder (12) is provided with an extrusion screw (36 ) can be moved along its longitudinal axis inside its hollow cylinder (40) so that the annular passage between the conical end (46) of the extrusion screw (36) and the conical nozzle (48 ) generates counter-pre ssion required for the material to exit through the nozzle flange (50) at the desired temperature. 2. Installation selon la revendication 1 comportant un pont (22) mobile par rapport au châssis-réservoir (18) supportant quatre vérins (52, 58, 62 et 64); le premier ou vérin central (52) assurant l'étanchéité du moule (14) à la station de remplissage du côté injection, le deuxième ou vérin de maintien (58) assurant l'étanchéité du moule (14) dans sa deuxième position, dite de consolidation, le troisième ou vérin de sectionnement (60) commandant une lame (62) coupant avec précision la coulée de matière débordant par 1'évent (59), le quatrième ou vérin d'éjection (64) démoulant la pièce à la dernière station.2. Installation according to claim 1 comprising a bridge (22) movable relative to the tank chassis (18) supporting four jacks (52, 58, 62 and 64); the first or central cylinder (52) sealing the mold (14) at the filling station on the injection side, the second or holding cylinder (58) sealing the mold (14) in its second position, called consolidation, the third or sectioning cylinder (60) controlling a blade (62) precisely cutting the flow of material overflowing through the vent (59), the fourth or ejection cylinder (64) unmolding the piece at the last station. 3. Installation selon les revendications 1 et 2 caractérisée en ce que le pont (22) comporte un palpeur (53), capable de détecter la sortie de matière par l'évent (59) du moule (14) et d'arrêter le cycle d'injection en enclenchant le cycle suivant, ce palpeur (53) pouvant être déplacé sur son support (54) afin de modifier la distance entre le palpeur (53) et l'évent (59).3. Installation according to claims 1 and 2 characterized in that the bridge (22) comprises a feeler (53), capable of detecting the exit of material through the vent (59) of the mold (14) and of stopping the cycle injection by switching on the following cycle, this probe (53) being able to be moved on its support (54) in order to modify the distance between the probe (53) and the vent (59). 4. Installation selon la revendication 1, caractérisée en ce que l'extrudeuse (12) est munie d'une vis d'extrusion courte (36) pouvant être déplacée suivant son axe longitudinal à l'intérieur de son cylindre creux d'entraînement (40) sous l'action d'une vis d'appui (42) commandée par une roue dentée (44).4. Installation according to claim 1, characterized in that the extruder (12) is provided with a short extrusion screw (36) which can be moved along its longitudinal axis inside its hollow drive cylinder ( 40) under the action of a support screw (42) controlled by a toothed wheel (44). 5- Installation selon la revendication 1, caractérisée en ce que le carrousel (16) comprend un plateau circulaire (74) qui peut être déplacé sur son arbre (78) muni d'un filetage après desserrage par rotation d'un écrou de blocage (86). 5- Installation according to claim 1, characterized in that the carousel (16) comprises a circular plate (74) which can be moved on its shaft (78) provided with a thread after loosening by rotation of a locking nut ( 86). 6. Installation selon la revendication 1, caractérisée en ce que chaque bride (51) généralement soudée au moule (14), est soumise pendant toute la rotation du carrousel (16) à la pression d'un moyen élastique constitué par deux clames (88), pouvant pivoter autour de leur axe, composées d'une vis de réglage de pression et d'un empilement d'un nombre variable de rondelles-ressorts (92).6. Installation according to claim 1, characterized in that each flange (51) generally welded to the mold (14), is subjected during the entire rotation of the carousel (16) to the pressure of an elastic means constituted by two clamps (88 ), which can pivot about their axis, composed of a pressure adjustment screw and a stack of a variable number of spring washers (92). 7- Installation selon les revendications 1 et7- Installation according to claims 1 and 2, caractérisée en ce qu'elle comporte un dispositif de démoulage par soufflage à 1'air comprimé, comportant un vérin (64) composé d'une tête de soufflage (66) munie d'un joint d'étanchéité (68) et d'une conduite (70).2, characterized in that it comprises a device for demolding by blowing with compressed air, comprising a jack (64) composed of a blowing head (66) provided with a seal (68) and d 'a pipe (70). 8. Installation selon les revendications 1 et 2, caractérisée en ce qu'elle comporte un dispositif de réception, après démoulage, de la pièce sur toute sa longueur, constitué par un tube rectangulaire (94) à fond basculant (96), commandée par un vérin (104), équipé d'un amortisseur (98) et d'une cellule photo-électrique (100, 102) détectant le passage d'un produit extrudé. 8. Installation according to claims 1 and 2, characterized in that it comprises a device for receiving, after demolding, the part over its entire length, consisting of a rectangular tube (94) with tilting bottom (96), controlled by a jack (104), equipped with a shock absorber (98) and a photoelectric cell (100, 102) detecting the passage of an extruded product.
PCT/BE1988/000025 1987-09-23 1988-09-21 Installation for the treatment and direct transformation of thermoplastic waste into castings Ceased WO1989002816A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8701069 1987-09-23
BE8701069A BE1001164A5 (en) 1987-09-23 1987-09-23 INSTALLATION FOR THE TREATMENT AND DIRECT TRANSFORMATION OF THERMOPLASTIC WASTE INTO MOLDED PARTS.

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WO1989002816A1 true WO1989002816A1 (en) 1989-04-06

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BE (2) BE1001164A5 (en)
WO (1) WO1989002816A1 (en)
ZA (1) ZA886888B (en)

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US20220055272A1 (en) * 2020-08-18 2022-02-24 Jing Si Pureland Co., Ltd. Injection machine for recycled plastic injection molding system
WO2022148841A1 (en) * 2021-01-11 2022-07-14 Replace Method for recycling waste in the form of flakes
EP4209321A1 (en) * 2022-01-10 2023-07-12 Aisapack Holding SA Extrusion device

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CN110524785B (en) * 2019-08-30 2022-01-18 深圳市京鼎工业技术股份有限公司 Multi-station injection molding machine for injection mold and using method thereof
CN114013001B (en) * 2021-10-19 2023-11-03 福建上杭润发电缆有限公司 External wire extrusion device for electronic engineering

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US4626189A (en) * 1985-11-18 1986-12-02 Floyd V. Hammer Method and machine for forming articles from a plastic material

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GB1121488A (en) * 1964-10-19 1968-07-31 Hoover Ball & Bearing Co Improvements in or relating to blow molding machines
US4008858A (en) * 1972-05-12 1977-02-22 Mitsubishi Petrochemical Company Limited Treating device for synthetic resin waste
GB2165797A (en) * 1984-10-22 1986-04-23 Richard J Bunyan A process for forming waste plastics material into an article
US4626189A (en) * 1985-11-18 1986-12-02 Floyd V. Hammer Method and machine for forming articles from a plastic material

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Publication number Priority date Publication date Assignee Title
EP0605914A1 (en) * 1992-12-10 1994-07-13 Lankhorst Recycling B.V. Elongate article having a core and a skin, manufactured from thermoplastic synthetic material, and a method and apparatus for manufacturing such articles
US20220055272A1 (en) * 2020-08-18 2022-02-24 Jing Si Pureland Co., Ltd. Injection machine for recycled plastic injection molding system
US11840001B2 (en) * 2020-08-18 2023-12-12 Jing Si Pureland Co., Ltd. Injection machine for recycled plastic injection molding system
WO2022148841A1 (en) * 2021-01-11 2022-07-14 Replace Method for recycling waste in the form of flakes
FR3118722A1 (en) * 2021-01-11 2022-07-15 Replace Process for recycling residues in the form of flakes
EP4209321A1 (en) * 2022-01-10 2023-07-12 Aisapack Holding SA Extrusion device
WO2023131912A1 (en) * 2022-01-10 2023-07-13 Aisapack Holding Sa Extrusion device

Also Published As

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AU2383888A (en) 1989-04-18
BE1001164A5 (en) 1989-08-01
AU615676B2 (en) 1991-10-10
BE1001648A5 (en) 1990-01-16
ZA886888B (en) 1989-05-30

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