EP0689498A1 - Method for shaping a polymer mixture into a block with a stable shape and size - Google Patents

Method for shaping a polymer mixture into a block with a stable shape and size

Info

Publication number
EP0689498A1
EP0689498A1 EP94908215A EP94908215A EP0689498A1 EP 0689498 A1 EP0689498 A1 EP 0689498A1 EP 94908215 A EP94908215 A EP 94908215A EP 94908215 A EP94908215 A EP 94908215A EP 0689498 A1 EP0689498 A1 EP 0689498A1
Authority
EP
European Patent Office
Prior art keywords
block
press
tips
polymers
dead volume
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.)
Withdrawn
Application number
EP94908215A
Other languages
German (de)
French (fr)
Inventor
Jean-Paul Vieslet
Bernard Vieslet
Pierre Poswick
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.)
Bonnesire Pierre
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0689498A1 publication Critical patent/EP0689498A1/en
Withdrawn legal-status Critical Current

Links

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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • 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
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3035—Means for conditioning the material to be pressed, e.g. paper shredding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • 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
    • B29L2031/772—Articles characterised by their shape and not otherwise provided for
    • B29L2031/7722—Block-shaped
    • 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 a process for shaping an elementary block of stable shape and dimensions from a mixture of polymers which are com ⁇ prime and constrained under load in a determined volume of a hydraulic press, including one dead volume is provided with tips heated to a temperature above the softening point of at least one of the aforementioned blend polymers, so as to form a block pierced by said tips.
  • a process for reinforcing backfill soils with the aid of a reinforcement structure of raw plastic waste that is re-used in raw form, mixed without any transformation, is disclosed in document EP-A-371898.
  • the waste which has a density much lower than that of the soil, is strongly compacted and then ligated to form rectangular blocks of about 1 m3 and a density of 0.3 to 0.6 depending on the intended use.
  • the process finds its main application in the construction of light backfill on compressible soils.
  • the material is however viscoelastic, sensitive to creep and also highly deformable as soon as the hydraulic stress is released during expansion.
  • the present invention aims to overcome the above drawbacks. To this end, it proposes a method, as described in the preamble of claim 1 attached, in which an internal cohesion of the fragments of the polymer mixture is achieved, according to a characteristic of the invention, by piercing the block with the 'using tips brought to a temperature above the softening point of at least one of the polymers of the above mixture.
  • the process uses as raw material recovery and / or waste materials, more particularly scrap materials resulting from industrial processes and / or sorted or unsorted residues from the consumer market.
  • raw materials are harvested and / or preconditioned according to well-known standards and are sent to an enclosure where they can optionally be brought to a temperature between -40 ° C to + 1000 ° C thus transforming their rheological characteristics.
  • These raw materials brought to a suitable temperature according to their final use are sent to one or more weighing, homogenization, preforming, densification and / or precompression chambers.
  • pre-transformed materials are introduced into one of the main pressing feed chambers, where they are then compressed under an adjustable pressure between 10 and 2.10 Pa depending on the starting product and the desired end use so as to obtain a density and / or volume perfectly controlled.
  • the process includes the introduction into the mass, possibly already formed, of tips brought to a working temperature higher than the softening temperature of at least part of the polymers. These points make it possible to create channels through the mass of the block.
  • a variant of the process makes it possible to compress the materials in the final volume while the hot tips are already in place at the desired temperature, which has the effect of creating an agglutination of the thermoplastics during the entire compression operation (low and high pressure ).
  • the channels thus formed or being formed can be used for the injection of heat transfer or cryogenic fluids or of any other material to obtain the desired final characteristics.
  • the channels have the effect of linking together the different blocks and / or stiffening and / or keep fit.
  • the channels formed can serve as anchoring points for the hook (s) of a lifting device or the fork of an elevator in order to facilitate handling and implementation of the blocks. They can also be used to adjust the density.
  • the process can use quite diverse materials, possibly mixed and relatively soiled. It does not require prior reformulation of the components by means of additives in order to make them compatible. It allows the use as is of materials which in other processes would be incompatible.
  • the process requires little or no cleaning and drying of the raw material. It can use relatively wet materials.
  • the tear resistance of the slices of blocks which are sawn to the desired thickness is very high because the layers of material, under the effect of the stress, are oriented in the direction of the force. Creep due to mechanical stress is reduced thanks to the presence of rigid connections which distribute the point stresses over a wide field.
  • the initial modulus is weak, expected that the sliding bonds do not block until after a certain level of deformation.
  • the process makes it possible to recover very large quantities of mixed plastic waste. By its simplicity, the process constitutes an ecological solution to the costly sorting and recycling problem.
  • Virtually all types of essentially flexible and semi-rigid plastics can be compressed and made into blocks.
  • the waste is distributed randomly in the compressed block.
  • the method may include incorporating into the mass of the block an additional hot-melt material. The process reduces the dispersion of non-degradable plastics in nature.
  • the process can accommodate a very large quantity of all flexible or semi-rigid plastics of any collection, sorting or collection, even if these plastics are heterogeneous or soiled, as well as a percentage of less than 15% of fragments of rigid plastic or another material with a melting point below 400 ° C.
  • the porosity of the heat-sealed blocks is very low, practically zero.
  • the flow of water is only achieved by perforations arranged at the end of compression of the block. From a certain density determined as a function of the thermoplastic materials used, the porosity of the blocks is zero and the flow of water impossible, which makes it possible to maintain an intact water table or a watercourse.
  • FIG. 1 is a longitudinal sectional view of a hydraulic press to package provided with heating spikes
  • FIG. 2 is a plan view of the press shown in FIG. 1,
  • Figure 3 is an end view of the press shown in Figures 1 and 2 and expulsion cylinders.
  • FIG. 4 is a partial side elevational view of the side door of the hydraulic press illustrated in Figures 1 to 3 and
  • FIG. 5 is an end view of a second upper side door.
  • the device intended to form the blocks of compressed plastic material is a horizontal hydraulic press 1 to be packaged.
  • a hydraulic unit not shown comprising in a known manner a hydraulic pump and an accumulator of about 200 bar ensures the movement of the piston 4.
  • the plastic waste to be compressed, previously flattened, optionally using a continuous helical press, are brought between the plates 2,3 of the hydraulic press.
  • These plates 2,3 optionally provided with a heating structure form with the side walls 6 of the press a cage of variable volume in which the material undergoes transverse pleating when it is compressed at a pressure of 1 to 2. 10 Pa. (10 to 20 bar) under a pushing effect of the mobile platform from 125 to 150 t.
  • Such a hydraulic press works discontinuously and processes successive loads.
  • the use of the hydraulic press 1 is facilitated by the arrangement of an armored side door 7, articulated around the hinges 10, actuated by the jacks 12 and locked by the jacks 13, making it possible to extract the compressed bundle without difficulty.
  • This fixed plate of the press can include heating tips 8 passing right through the dead volume of the hydraulic press to be packaged.
  • the formation of oblong areas of internal cohesion and compression around the above-mentioned channels makes it possible to bundle the bundle.
  • the cavities of hardened material surrounding the channels formed according to the invention, by the heating tips constitute spacers which carry out the internal connection of the block 11.
  • a lateral ejector 15 actuated by jacks 16 pushes the block 11 as soon as its rigidity is sufficient after cooling.
  • the press according to the invention can also be used to pack metal turnings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A basic block with a stable shape and size is shaped from fragments of a polymer mixture compressed in a hydraulic press (1) by piercing the block with spikes (8) heated to a temperature higher than the softening point of at least one of the polymers in said mixture.

Description

Procédé pour façonner un bloc de forme et dimensions stables à partir d'un mélange de polymères. Process for forming a block of stable shape and dimensions from a mixture of polymers.
La présente invention est relative à un procédé pour façonner un bloc élémentaire de forme et de dimensions stables à partir d'un mélange de polymères que l'on com¬ prime et contraint sous charge dans un volume déterminé d'une presse hydraulique, dont un volume mort est pourvu de pointes chauffées à une température supérieure au point de ramollissement d'au moins un des polymères de mélange susdit, de manière à former un bloc transpercé par lesdites pointes.The present invention relates to a process for shaping an elementary block of stable shape and dimensions from a mixture of polymers which are com¬ prime and constrained under load in a determined volume of a hydraulic press, including one dead volume is provided with tips heated to a temperature above the softening point of at least one of the aforementioned blend polymers, so as to form a block pierced by said tips.
Elle trouve sa principale application en génie civil en particulier dans les travaux de terrassement, d'allége¬ ment des sols, d'isolation, de drainage, de protection sismique, de protection souterraine en mines et gale- ries, de protection contre les éboulements en surface, de panneaux acoustiques, de bardage, d'ouvrages mobiles de génie civil (ponts-passage routiers sur marécage).It finds its main application in civil engineering, in particular in earthworks, lightening of soil, insulation, drainage, seismic protection, underground protection in mines and galleries, protection against landslides on the surface, acoustic panels, cladding, mobile civil engineering works (road bridges over swamp).
Elle permet de réaliser des massifs ayant une portance et une structure bien meilleures que celles d'un sol présentant des propriétés de continuité, de souplesse, de déformalité et de résistance à la traction. Des exem¬ ples pratiques d'application sont l'aménagement de parkings, d'aires de jeux, de jardins publics et de terrains de sports.It makes it possible to produce massifs having a much better bearing capacity and structure than those of a soil presenting properties of continuity, flexibility, deformality and tensile strength. Practical examples of application are the development of parking lots, playgrounds, public gardens and sports grounds.
Un procédé de renforcement des sols de remblai à l'aide d'une structure de renfort de déchets textiles plasti¬ ques remployés bruts, en mélange sans aucune transfor- ation est divulgué par le document EP-A- 371898. Les déchets qui ont une densité très inférieure à celle du sol, sont fortement compactés puis ligaturés pour former des blocs parallélépipédiques de 1 m3 environ et de densité de 0,3 à 0,6 en fonction de l'utilisation envisagée. Le procédé trouve sa principale application dans la construction de remblai léger sur sols compressibles. Le matériau est cependant viscoélastique, sensible au fluage et également fortement déformable dès relâchement de la contrainte hydraulique lors de la détente.A process for reinforcing backfill soils with the aid of a reinforcement structure of raw plastic waste that is re-used in raw form, mixed without any transformation, is disclosed in document EP-A-371898. The waste, which has a density much lower than that of the soil, is strongly compacted and then ligated to form rectangular blocks of about 1 m3 and a density of 0.3 to 0.6 depending on the intended use. The process finds its main application in the construction of light backfill on compressible soils. The material is however viscoelastic, sensitive to creep and also highly deformable as soon as the hydraulic stress is released during expansion.
La présente invention vise à pallier les inconvénients susdits. Elle propose dans ce but un procédé, tel que décrit dans le préambule de la revendication 1 ci- jointe, dans lequel on réalise, suivant une caractéristique de l'invention, une cohésion interne des fragments du mélange de polymères par transperçage du bloc à l'aide de pointes portées à un température supérieure au point de ramolissement d'au moins un des polymères du mélange susdit.The present invention aims to overcome the above drawbacks. To this end, it proposes a method, as described in the preamble of claim 1 attached, in which an internal cohesion of the fragments of the polymer mixture is achieved, according to a characteristic of the invention, by piercing the block with the 'using tips brought to a temperature above the softening point of at least one of the polymers of the above mixture.
Le procédé utilise comme matière première des matières de récupération et/ou de rebut, plus particulièrement des chutes de matières résultant de process industriels et/ou des résidus triés ou non, issus du marché de la consommation.The process uses as raw material recovery and / or waste materials, more particularly scrap materials resulting from industrial processes and / or sorted or unsorted residues from the consumer market.
Ces matières premières sont récoltées et/ou préconditionnées selon des normes bien connues et sont acheminées dans une enceinte où elles peuvent éventuellement être portées à une température comprise entre -40°C à + 1000°C transformant ainsi leurs caractéristiques rhéologiques . Ces matières premières mises à température adéquate en fonction de leur utilisation finale sont dirigées vers une ou plusieurs chambres de pesage, d'homogénéisation, de préformage, de densification et/ou de précompression.These raw materials are harvested and / or preconditioned according to well-known standards and are sent to an enclosure where they can optionally be brought to a temperature between -40 ° C to + 1000 ° C thus transforming their rheological characteristics. These raw materials brought to a suitable temperature according to their final use are sent to one or more weighing, homogenization, preforming, densification and / or precompression chambers.
Ces matières prétransformées sont introduites dans l'une des chambres d'alimentation de pressage principal, où elles sont alors comprimées sous une pression réglable entre 10 à 2.10 Pa en fonction du produit de départ et de l'utilisation finale désirée de manière à obtenir une densité et/ou un volume parf itement contrôlés.These pre-transformed materials are introduced into one of the main pressing feed chambers, where they are then compressed under an adjustable pressure between 10 and 2.10 Pa depending on the starting product and the desired end use so as to obtain a density and / or volume perfectly controlled.
Lorsque ces matières ont atteint l'endroit de formage final grâce en partie à un frittage réactif des fragments de polymères, elles se présentent sous une forme compacte monolithique et stable.When these materials have reached the final forming location thanks in part to reactive sintering of the polymer fragments, they are in a compact monolithic and stable form.
Le procédé comprend l'introduction dans la masse éventuellement déjà formée, de pointes portées à une température de travail supérieure à la température de ramolissement d'une partie au moins des polymères. Ces pointes permettent de créer des canaux à travers la masse du bloc. Une variante du procédé permet de comprimer les matières dans le volume final alors que les pointes chaudes sont déjà en place à la température désirée, ce qui a pour effet de créer un agglutinement des thermoplastiques pendant toute l'opération de compression (basse et haute pression).The process includes the introduction into the mass, possibly already formed, of tips brought to a working temperature higher than the softening temperature of at least part of the polymers. These points make it possible to create channels through the mass of the block. A variant of the process makes it possible to compress the materials in the final volume while the hot tips are already in place at the desired temperature, which has the effect of creating an agglutination of the thermoplastics during the entire compression operation (low and high pressure ).
Les canaux ainsi formés ou en cours de formation peuvent servir à l'injection de fluides caloporteurs ou cryogéniques ou encore de toutes autres matières pour obtenir les caractéristiques finales désirées. Les canaux ont pour effet de liaisonner entre eux les différents blocs et/ou les rigidifier et/ou les maintenir en forme.The channels thus formed or being formed can be used for the injection of heat transfer or cryogenic fluids or of any other material to obtain the desired final characteristics. The channels have the effect of linking together the different blocks and / or stiffening and / or keep fit.
Les canaux formés peuvent servir de points d'ancrage du ou des crochets d'un engin de levage ou la fourche d'un élévateur en vue de faciliter la manipulation et la mise en oeuvre des blocs. Ils peuvent également permettre d'ajuster la densité.The channels formed can serve as anchoring points for the hook (s) of a lifting device or the fork of an elevator in order to facilitate handling and implementation of the blocks. They can also be used to adjust the density.
Le procédé peut mettre en oeuvre des matières tout à fait diverses, éventuellement mélangées et relativement souillées. Il ne nécessite pas de reformulation préalable des composants au moyen d'additifs en vue de les rendre compatibles. Il permet d'utiliser tels quels des matières qui dans d'autres procédés seraient incompatibles.The process can use quite diverse materials, possibly mixed and relatively soiled. It does not require prior reformulation of the components by means of additives in order to make them compatible. It allows the use as is of materials which in other processes would be incompatible.
En outre, le procédé ne nécessite pas ou peu de nettoyage et séchage de la matière première. Il peut utiliser des matières relativement mouillées . La résistance à la déchirure des tranches de blocs que l'on scie à l'épaisseur souhaitée, est très élevée car les nappes de matière, sous l'effet de la sollicitation, s'orientent dans la direction de l'effort. Le fluage dû aux contraintes mécaniques est réduit grâce à la présence de liaisons rigides qui répartissent les sollicitations ponctuelles sur un champ étendu.In addition, the process requires little or no cleaning and drying of the raw material. It can use relatively wet materials. The tear resistance of the slices of blocks which are sawn to the desired thickness is very high because the layers of material, under the effect of the stress, are oriented in the direction of the force. Creep due to mechanical stress is reduced thanks to the presence of rigid connections which distribute the point stresses over a wide field.
Le module initial est faible, attendu que les liaisons glissantes ne se bloquent qu'après un certain niveau de déformation.The initial modulus is weak, expected that the sliding bonds do not block until after a certain level of deformation.
Le procédé permet de valoriser de très grandes quantitués de déchets de matières plastiques en mélange. Par sa simplicité le procédé constitue une solution écologique au coûteux problème de tri et de recyclage.The process makes it possible to recover very large quantities of mixed plastic waste. By its simplicity, the process constitutes an ecological solution to the costly sorting and recycling problem.
Pratiquement tous les types de plastiques essentiel- lement souples et semi-rigides peuvent être compressés et transformés en blocs. Les déchets sont répartis de manière aléatoire dans le bloc comprimé. Le procédé peut comprendre l'incorporation dans la masse du bloc d'une matière additionnelle thermofusible. Le procédé réduit la dispersion des plastiques non dégradables dans la nature.Virtually all types of essentially flexible and semi-rigid plastics can be compressed and made into blocks. The waste is distributed randomly in the compressed block. The method may include incorporating into the mass of the block an additional hot-melt material. The process reduces the dispersion of non-degradable plastics in nature.
Le procédé peut accueillir en très grande quantité tous les plastiques souples ou semi-rigides de n'importe quelle collecte, tri ou ramassage, même si ces plastiques sont hétérogènes ou salis ainsi qu'un pourcentage inférieur à 15% de fragments de plastique rigide ou d'une matière autre présentant un point de fusion inférieur à 400°C.The process can accommodate a very large quantity of all flexible or semi-rigid plastics of any collection, sorting or collection, even if these plastics are heterogeneous or soiled, as well as a percentage of less than 15% of fragments of rigid plastic or another material with a melting point below 400 ° C.
La porosité des blocs thermosoudés est très faible, pratiquement nulle. L'écoulement des eaux ne se réalise que par perforations aménagées en fin de compression du bloc. A partir d'une certaine densité déterminée en fonction des matières thermoplastiques utilisées, la porosité des blocs est nulle et l'écoulement des eaux impossible, ce qui permet de maintenir intacte une nappe phréatique ou un cours d'eau.The porosity of the heat-sealed blocks is very low, practically zero. The flow of water is only achieved by perforations arranged at the end of compression of the block. From a certain density determined as a function of the thermoplastic materials used, the porosity of the blocks is zero and the flow of water impossible, which makes it possible to maintain an intact water table or a watercourse.
L'invention exposée ci-dessus dans sa forme générale sera mieux comprise à la lecture de la description qui suit et à l'examen des dessins annexés qui en représentent à titre d'exemple non limitatif, un mode de réalisation préférentiel auquel la description qui suit fait référence.The invention described above in its general form will be better understood on reading the description which follows and on examining the appended drawings which show by way of nonlimiting example, a method of preferential realization to which the description which follows refers.
Dans ces dessins :In these drawings:
- la figure 1 est une vue en coupe longitudinale d'une presse hydraulique à empaqueter pourvue de pointes chauffantes;- Figure 1 is a longitudinal sectional view of a hydraulic press to package provided with heating spikes;
- La figure 2 est une vue en plan de la presse montrée dans la figure 1,FIG. 2 is a plan view of the press shown in FIG. 1,
- La figure 3 est une vue en bout de la presse montrée aux figures 1 et 2 et des vérins d'expulsion.- Figure 3 is an end view of the press shown in Figures 1 and 2 and expulsion cylinders.
- La figure 4 est une vue partielle en élévation latérale de la porte latérale de la presse hydraulique illustrée dans les figures 1 à 3 et- Figure 4 is a partial side elevational view of the side door of the hydraulic press illustrated in Figures 1 to 3 and
- la figure 5 est une vue en bout d'une seconde porte latérale supérieure.- Figure 5 is an end view of a second upper side door.
Dans ces figures, les mêmes signes de référence désignent des éléments identiques et ou analogues .In these figures, the same reference signs designate identical and or analogous elements.
L'engin destiné à former les blocs de matière plastique comprimée est une presse hydraulique horizontale 1 à empaqueter.The device intended to form the blocks of compressed plastic material is a horizontal hydraulic press 1 to be packaged.
Elle est constituée d'un plateau vertical fixe 2, un plateau mobile 3 fixé à un piston 4 maintenu par quatre tirants 5 et des parois latérales délimitant une cage de volume variable à l'intérieur desquels se déplace le plateau mobile 3 à une vitesse comprise entre 2 et 4 m/min.It consists of a fixed vertical plate 2, a mobile plate 3 fixed to a piston 4 held by four tie rods 5 and side walls delimiting a cage of variable volume inside which the mobile platform 3 at a speed between 2 and 4 m / min.
Un groupe hydraulique non montré, comprenant de manière connue une pompe hydraulique et un accumulateur d'environ 200 bar assure le mouvement du piston 4. Les déchets plastiques à comprimer, préalablement aplatis, éventuellement à l'aide d'une presse hélicoïdale continue, sont amenés entre les plateaux 2,3 de la presse hydraulique. Ces plateaux 2,3 éventuellement munis d'une structure chauffante forment avec les parois latérales 6 de la presse une cage de volume variable dans laquelle la matière subit un plissage transversal lorsqu'elle est comprimée à une pression de 1 à 2. 10 Pa. (10 à 20 bar) sous un effet de poussée du plateau mobile de 125 à 150 t.A hydraulic unit not shown, comprising in a known manner a hydraulic pump and an accumulator of about 200 bar ensures the movement of the piston 4. The plastic waste to be compressed, previously flattened, optionally using a continuous helical press, are brought between the plates 2,3 of the hydraulic press. These plates 2,3 optionally provided with a heating structure form with the side walls 6 of the press a cage of variable volume in which the material undergoes transverse pleating when it is compressed at a pressure of 1 to 2. 10 Pa. (10 to 20 bar) under a pushing effect of the mobile platform from 125 to 150 t.
Une telle presse hydraulique travaille de manière discontinue et traite des charges successives. L'emploi de la presse hydraulique 1 est facilité par l'aménagement d'une porte latérale blindée 7, articulée autour des charnières 10, actionnée par les vérins 12 et verrouillée par les vérins 13, permettant d'extraire sans peine le ballot comprimé. Ce plateau fixe de la presse peut comporter des pointes chauffantes 8 traversant de part en part le volume mort de la presse hydraulique à empaqueter. La formation de zones oblongues de cohésion interne et de contention autour des canaux susdits permet de réaliser un liassage du ballot. Les cavités de matière durcies entourant les canaux formés selon l'invention, par les pointes chauffantes constituent des entretoises qui réalisent la liaison interne du bloc 11. Un éjecteur latéral 15 actionné par des vérins 16 permet de repousser le bloc 11 dès que sa rigidité est suffisante après refroidissement.Such a hydraulic press works discontinuously and processes successive loads. The use of the hydraulic press 1 is facilitated by the arrangement of an armored side door 7, articulated around the hinges 10, actuated by the jacks 12 and locked by the jacks 13, making it possible to extract the compressed bundle without difficulty. This fixed plate of the press can include heating tips 8 passing right through the dead volume of the hydraulic press to be packaged. The formation of oblong areas of internal cohesion and compression around the above-mentioned channels makes it possible to bundle the bundle. The cavities of hardened material surrounding the channels formed according to the invention, by the heating tips constitute spacers which carry out the internal connection of the block 11. A lateral ejector 15 actuated by jacks 16 pushes the block 11 as soon as its rigidity is sufficient after cooling.
La presse suivant l'invention peut également servir à paqueter les tournures de métal. The press according to the invention can also be used to pack metal turnings.

Claims

REVENDICATIONS
1. Procédé pour façonner un bloc élémentaire de forme et de dimensions stables à partir de fragments d'un mélange de polymères que l'on comprime et contraint sous charge dans un volume déterminé d'une presse hydraulique (1), dont un volume mort est pourvu de pointes (8) chauffées à une température supérieure au point de ramollissement d'au moins un des polymères du mélange susdit, de manière à former un bloc transpercé par lesdites pointes, caractérisé en ce qu'on fait pénétrer, dans les polymères préalablement comprimés, en cours ou en fin de compression, des pointes (8) portées par un plateau mobile (9) au moins et chauffées à une température de travail supérieure à la température de fusion d'au moins un des polymères.1. Method for forming an elementary block of stable shape and dimensions from fragments of a mixture of polymers which is compressed and constrained under load in a determined volume of a hydraulic press (1), including a dead volume is provided with tips (8) heated to a temperature higher than the softening point of at least one of the polymers of the above mixture, so as to form a block pierced by said tips, characterized in that the polymers are made to penetrate previously compressed, during or at the end of compression, tips (8) carried by at least one movable plate (9) and heated to a working temperature higher than the melting temperature of at least one of the polymers.
2. Procédé selon la revendication 1, caractérisé en ce que le retrait des pointes (8) du bloc permet de créer des perforations à travers la masse du bloc qui rigidifient et maintiennent le bloc en forme.2. Method according to claim 1, characterized in that the withdrawal of the points (8) of the block makes it possible to create perforations through the mass of the block which stiffen and maintain the block in shape.
3. Procédé selon la revendication 1, caractérisé en ce que, par la mise en place dans le volume mort de la presses, d'objets creux de formes diverses, où des endroits prédéterminés, permet de ménager des conduits ou des cavités destinés à servir d'assise à des tubes ou des câbles.3. Method according to claim 1, characterized in that, by placing in the dead volume of the presses, hollow objects of various shapes, where predetermined locations, allows to provide conduits or cavities intended to serve seat to tubes or cables.
4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les perforations susdites créent des conduits servant à l'injection de fluides caloporteurs ou cryogéniques. 4. Method according to any one of the preceding claims, characterized in that the aforesaid perforations create conduits used for the injection of heat transfer or cryogenic fluids.
5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on calibre le bloc pourvu de moyens de contention par sciage des faces et que l'on scie le bloc en tranches transversales.5. Method according to any one of the preceding claims, characterized in that the block is provided with means of compression by sawing the faces and that the block is sawn in transverse slices.
6. Presse hydraulique à empaqueter comprenant un plateau fixe (2) et un premier plateau mobile (3) actionné par un piston (4) au moins en vue de mettre en oeuvre le procédé selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un second plateau mobile actionné par un piston est garni de pointes chauffantes (8).6. Hydraulic packaging press comprising a fixed plate (2) and a first movable plate (3) actuated by a piston (4) at least in order to implement the method according to any one of the preceding claims, characterized in that that a second movable plate actuated by a piston is furnished with heating spikes (8).
7. Presse hydraulique selon la revendication 6, caractérisée en ce qu'elle comprend un plateau fixe pourvu d'orifices (14) au travers desquels des pointes chauffantes (8) sont introduites parallèlement à l'axe longitudinal de la presse, de manière à traverser de part en part le volume mort de la presse.7. Hydraulic press according to claim 6, characterized in that it comprises a fixed plate provided with orifices (14) through which heating tips (8) are introduced parallel to the longitudinal axis of the press, so as to go right through the dead volume of the press.
8. Presse hydraulique selon la revendication 6 ou 7, caractérisée en ce que des pointes chauffantes (8) sont introduites horizontalement ou verticalement, transversalement à la presse, au travers d'orifices ménagés dans une paroi latérale du volume mort de la presse, de manière à traverser ce volume mort de part en part dans le sens de la largeur du bloc comprimé. 8. Hydraulic press according to claim 6 or 7, characterized in that heating tips (8) are introduced horizontally or vertically, transversely to the press, through orifices formed in a side wall of the dead volume of the press, so as to cross this dead volume right through in the width direction of the compressed block.
EP94908215A 1993-03-16 1994-03-15 Method for shaping a polymer mixture into a block with a stable shape and size Withdrawn EP0689498A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9300249A BE1008199A5 (en) 1993-03-16 1993-03-16 Method for shaping block form and dimensions stable from a mixture of polymers.
BE9300249 1993-03-16
PCT/BE1994/000022 WO1994021435A1 (en) 1993-03-16 1994-03-15 Method for shaping a polymer mixture into a block with a stable shape and size

Publications (1)

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EP0689498A1 true EP0689498A1 (en) 1996-01-03

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US (1) US5587120A (en)
EP (1) EP0689498A1 (en)
JP (1) JPH08507979A (en)
BE (1) BE1008199A5 (en)
WO (1) WO1994021435A1 (en)

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EP1292437A4 (en) * 2000-05-04 2004-07-21 Bale Fusion Ltd A method and apparatus for forming an article and an article formed thereby
NZ515224A (en) * 2001-11-02 2004-09-24 Bale Fusion Ltd A method and apparatus for forming an article and article formed thereby
US7306093B2 (en) 2003-02-14 2007-12-11 Eastman Chemical Company Packages, packaging systems, methods for packaging and apparatus for packaging
US8932043B2 (en) * 2011-04-08 2015-01-13 Michael Brandon Wilhelm Plastic trim pelletizer and bricker reclaim device
LU92738B1 (en) * 2015-06-11 2016-12-12 Biocarbon Ind Sarl BIOMASS PREPARATION PROCESS AND INSTALLATION
LU100718B1 (en) * 2018-03-01 2019-10-01 Cristalux Int Sarl THERMOPLASTIC MATTRESS MATERIAL, PROCESS FOR MANUFACTURING THE SAME, AND USES THEREOF

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DE3024229A1 (en) * 1980-06-27 1982-01-21 Zimmermann, geb. Gerke, Margarete, 3406 Bovenden Reconstituted thermoplastic sheets prodn. - in which assorted film waste is reduced, mixed, hot-pressed between cauls and cooled to release
FR2650203B1 (en) * 1989-07-25 1992-02-28 Sarp Ind PROCESS AND PLANT FOR THE TREATMENT OF DRUGS CONTAINING LIQUID WASTE
DE4117797A1 (en) * 1991-05-30 1992-12-03 Thomas Goettert Low energy recycling of clean thermoplastic scrap - uses cold compression tool with plate having heated spikes for local fusing of polymer
DE9208143U1 (en) * 1992-06-17 1992-11-26 Kuhne Anlagenbau GmbH, 5205 St Augustin Plant for volume reduction of film waste
US5482665A (en) * 1994-03-18 1996-01-09 General Motors Corporation Method/apparatus for making fiber-filled cushion

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See references of WO9421435A1 *

Also Published As

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BE1008199A5 (en) 1996-02-13
US5587120A (en) 1996-12-24
WO1994021435A1 (en) 1994-09-29
JPH08507979A (en) 1996-08-27

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