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WO2003072331A1 - Procede et machine pour l'utilisation de dechets en matiere plastique - Google Patents

Procede et machine pour l'utilisation de dechets en matiere plastique Download PDF

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Publication number
WO2003072331A1
WO2003072331A1 PCT/GB2003/000682 GB0300682W WO03072331A1 WO 2003072331 A1 WO2003072331 A1 WO 2003072331A1 GB 0300682 W GB0300682 W GB 0300682W WO 03072331 A1 WO03072331 A1 WO 03072331A1
Authority
WO
WIPO (PCT)
Prior art keywords
granules
sheet
machine
moulding
conveyor
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/GB2003/000682
Other languages
English (en)
Inventor
Philip Arthur Hadley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU2003209982A priority Critical patent/AU2003209982A1/en
Publication of WO2003072331A1 publication Critical patent/WO2003072331A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/228—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length using endless belts feeding the material between non-rotating pressure members, e.g. vibrating pressure members
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/26—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length in several steps
    • 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
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/28—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/48—Endless belts
    • 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
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3405—Feeding the material to the mould or the compression means using carrying means
    • B29C2043/3416—Feeding the material to the mould or the compression means using carrying means conveyor belts
    • 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
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/48—Endless belts
    • B29C2043/483—Endless belts cooperating with a second endless belt, i.e. double band presses
    • 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
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/30—Making multilayered or multicoloured articles
    • B29C43/305—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/02—Moulding by agglomerating
    • 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
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules
    • 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
    • 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

  • This invention relates to a method and machine for the utilisation of scrap plastics material, and is particularly but not exclusively concerned with the utilisation of scrap plastics material as is currently used in packaging, such as, for example, scrap polythene in sheet form.
  • scrap plastics material is desirable both economically and environmentally, and new legislation is shortly to be introduced in the United Kingdom concerning the re-use of packaging waste, including scrap plastics.
  • the re-extrusion process means that, in general, different grades of plastics need to be processed separately.
  • scrap plastics material a method of utilisation of scrap plastics material, involving the steps: a) procuring scrap thermoplastic material in granular form; b) conveying the granular material along a pathway; c) subjecting the material whilst being so conveyed to heat from substantially one side only so as to cause the material partly to melt; and d) moulding the partially melted granular material into a desired shape.
  • the granules are heated conveniently by radiant heating means so as partially to melt the granule on one side only, eg. to a depth of no greater than the radius of the granules.
  • radiant heating means so as partially to melt the granule on one side only, eg. to a depth of no greater than the radius of the granules.
  • an outer surface of the granules, on the side opposite to the heating means, may remain substantially unmelted.
  • the heat content of the melted part of the granules is sufficient to at least substantially soften the remainder of the granules, during the moulding stage of the process.
  • the moulding machine is a compression moulding machine, in which agglomerated granular material is compressed to form a continuous sheet or slab of plastics material, typically 2mm to 50mm thickness.
  • plastics slab is particularly useful as a flooring material, and/or as a walling material, providing sound and heat insulation.
  • the partially melted granules may be deposited on a conveyer belt operative to convey the granules continuously through a compression zone, in which the sheet is formed.
  • the compression machine comprises a heating inlet zone, to provide the moulded sheet with a smooth surface finish, and a cooling zone.
  • the sheet may be formed adhered to a base matrix or substrate, which may conveniently be fed continuously through the conveyer.
  • substrates may include sacking, plastic film, leather, melamine or the like.
  • the sheet may be formed as a sandwich between two spaced substrate sheets.
  • filler material may be included with the partially melted granules, eg. glass particles, granite or brick dust, sawdust etc.
  • the invention above described may be utilised to mould a sheet or slab of single thickness, but if desired may be utilised to mould a slab formed as a laminate of two or more thicknesses.
  • further partially melted material may be deposited onto an upper surface of an already-moulded slab, which may then be fed through a second moulding machine, to produce a thicker slab.
  • such fillers may be conveyed through the heating device, to ensure an absence of moisture.
  • FIGURE 1 is a schematic elevational view of a machine which is a preferred embodiment of the invention.
  • FIGURE 2 is a schematic elevational view of a modification of the machine which is the preferred embodiment of the invention, particularly for use in the moulding of a laminate.
  • the machine which is the preferred embodiment of this invention, is specifically for use in carrying out a process of utilisation of scrap plastics material, also illustrative of the invention in certain of its aspects, and involves the use of regranulated scrap plastics material, the regranulation being carried out by any convenient process or means.
  • the machine which is the preferred embodiment of this invention comprises a heating device 6, comprising an elongate conveyor 8, over which a radiant heating device 10 is mounted, elements 12 directing heat towards the conveyor belt 8, and material thereon.
  • a compression moulding device 14 Downstream of the conveyor 8 is a compression moulding device 14, comprising a lower conveyor belt 16 and an upper conveyor belt 18, said conveyor belts converging in a direction away from the conveyor 8.
  • the conveyor belts 16 and 18 are each of stainless steel, and comprise an upstream, heated section 16a, 18a, a central section 16b, 18b and a downstream, cooled section, 16c, 18c, conveniently said heating and cooling being effected by the use of heating and/or water cooling elements between the conveyor runs.
  • scrap plastics material in conveniently-sized granules is brought towards the machine on a conveyor 4, being deposited on the conveyor belt 8, and moved from left to right as shown in the drawing, through the heating device 6.
  • the speed of the conveyor belt 8, and the rate of deposition of granular material thereon is such as to provide substantially a single layer only of granules on the conveyor belt 8, ensuring that substantially all granules are heated on the upper side, causing the granules to melt in an upper diametral half.
  • melt is used herein to refer to the viscat softening point, at which the plastic material attains a specific degree of fluidity.
  • partially melted plastics granules are deposited from the conveyor 8 onto the lower conveyor 16, to be conveyed through the compression moulding device 14.
  • substantially the whole of the compression is effected between the heated, convergent section 16a and 18a of the conveyor 14, the compression being produced as the partly melted granular material is drawn into the conveyor effecting working of the plastics material, producing a high degree of mixing and homogeneity.
  • the compressed material is then drawn through the cooling section 16b, 18b, through a final section of the conveyor, and emerges as a continuous sheet or slab 30 of plastics material, typically having a width in the order of 2 metres, and a thickness typically from 2mm to 50mm.
  • filler material which may be granite dust, brick dust, glass particles, may be introduced into the material, conveniently by being added to the material as it is drawn into the machine, at the point A or upstream thereof, ensuring that the filler material is properly dried prior to being mixed with the plastics material within the compression moulding machine.
  • a lining may be provided to the sheet 30, which may be in the form of sacking, webbing, or high quality plastic sheet, such as melamine, or the like, conveniently the material being drawn into the conveyor immediately adjacent the upper run of the conveyor belt 16, to ensure that the plastic material which is formed by the compression moulding machine is firmly adhered to the substrate sheet.
  • the use of the preferred embodiment is feasible in the moulding of sheet material up to perhaps 50mm in thickness, in practice moulding material to this or greater thickness presents difficulties in cooling and maintaining rigidity, and thus the invention which is the preferced embodiment of this invention may be utilised in a modified form, shown in Figure 2, in which similar numerals have been used, increased by 100, to denote parts similar to those described in the first embodiment.
  • a pre-moulded sheet 30 is fed through the machine 114, in contact with the lower conveyor 116, and partially melted plastics granules are deposited onto the upper surface of the sheet 30, to be integrated therewith in the moulding operation, as the granules together with the pre-moulded sheet are passed through the moulding machine 114.
  • moulded sheet may be produced in laminate form, in a number of stages, to a very large slab thickness, and, as the final layer 130 is moulded onto the pre-moulded layer 30, if desired a cover sheet may be introduced, as indicated by the reference numeral C in Figure 2.
  • the sheet 30 moulded as described and illustrated in Figure 1 is fed directly into the machine illustrated in Figure 2, whereby integration of the additional plastics granules with the sheet 30 is assisted by the fact that the sheet 30 may still be warm.
  • the partially melting of the granules, and the working of the partially melted granules in the compression moulding machine has been found to produce a high quality and highly durable recycled sheet material, which has a wide variety of uses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne des déchets en matière plastique fournis de manière pratique sous forme granulaire qui sont amenés à une machine. Cette dernière comprend un convoyeur allongé (8) sur lequel un moyen de chauffage par chaleur rayonnante est prévu, pour faire fondre partiellement les granules d'un côté seulement, le côté opposé des granules restant sensiblement non fondus. En aval du convoyeur (8) se trouve un dispositif de moulage par compression (14) qui comprend un convoyeur à bande inférieur (16) et un convoyeur à bande supérieur (18) qui convergent vers le sens opposé au convoyeur (8). Lors de l'utilisation de la machine pour mettre en oeuvre ce procédé, des granules de déchets plastiques sont partiellement fondus sur le convoyeur (8) et déposés sur le convoyeur inférieur (16) et transportés dans le dispositif de moulage par compression (14) pour former les déchets plastiques en feuilles ou en plaques, avec une épaisseur comprise entre 2 et 15 mm. Un revêtement (30) peut être placé sur la feuille, sous forme d'une feuille de plastique de haute qualité, d'ensachage ou en bande.
PCT/GB2003/000682 2002-02-26 2003-02-14 Procede et machine pour l'utilisation de dechets en matiere plastique Ceased WO2003072331A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003209982A AU2003209982A1 (en) 2002-02-26 2003-02-14 Method and machine for the utilisation of scrap plastic material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0204385A GB0204385D0 (en) 2002-02-26 2002-02-26 Improvements relating to the utilisation of scrap plastics material
GB0204385.9 2002-02-26

Publications (1)

Publication Number Publication Date
WO2003072331A1 true WO2003072331A1 (fr) 2003-09-04

Family

ID=9931725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000682 Ceased WO2003072331A1 (fr) 2002-02-26 2003-02-14 Procede et machine pour l'utilisation de dechets en matiere plastique

Country Status (3)

Country Link
AU (1) AU2003209982A1 (fr)
GB (1) GB0204385D0 (fr)
WO (1) WO2003072331A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10350417A1 (de) 2003-10-28 2005-06-02 Behr Gmbh & Co. Kg Verfahren zur Herstellung eines Lüfterrades sowie nach diesem Verfahren hergestelltes Lüfterrad
WO2006060895A1 (fr) * 2004-12-08 2006-06-15 Hossein Borazghi Procede et machine de production de produits composites thermoplastiques legers selon une maniere continue
WO2013001522A1 (fr) * 2011-06-27 2013-01-03 Kingspan Holdings (Irl) Limited Procédé et appareil de fabrication d'un panneau isolant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192294A (en) * 1962-06-21 1965-06-29 Us Rubber Co Method of molding vinyl resin sheet material having an embossed surface
US3359352A (en) * 1965-06-18 1967-12-19 Congoleum Nairn Inc Process for producing decorative surface covering
EP0227029A2 (fr) * 1985-12-27 1987-07-01 Hüls Troisdorf Aktiengesellschaft Procédé pour la fabrication de produits plans homogènes colorés en matière thermoplastique
DE4340478A1 (de) * 1993-11-27 1995-06-01 Dieter Arnds Verfahren und Vorrichtung zum Herstellen eines bahnenförmigen Belagwerkstoffes und Anwendung als Boden- und Wandungsbelag
US6217700B1 (en) * 1997-11-21 2001-04-17 Schilling-Knobel Gmbh Method of and apparatus for manufacturing thermoset webs of thermoplastic polymer material particles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192294A (en) * 1962-06-21 1965-06-29 Us Rubber Co Method of molding vinyl resin sheet material having an embossed surface
US3359352A (en) * 1965-06-18 1967-12-19 Congoleum Nairn Inc Process for producing decorative surface covering
EP0227029A2 (fr) * 1985-12-27 1987-07-01 Hüls Troisdorf Aktiengesellschaft Procédé pour la fabrication de produits plans homogènes colorés en matière thermoplastique
DE4340478A1 (de) * 1993-11-27 1995-06-01 Dieter Arnds Verfahren und Vorrichtung zum Herstellen eines bahnenförmigen Belagwerkstoffes und Anwendung als Boden- und Wandungsbelag
US6217700B1 (en) * 1997-11-21 2001-04-17 Schilling-Knobel Gmbh Method of and apparatus for manufacturing thermoset webs of thermoplastic polymer material particles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10350417A1 (de) 2003-10-28 2005-06-02 Behr Gmbh & Co. Kg Verfahren zur Herstellung eines Lüfterrades sowie nach diesem Verfahren hergestelltes Lüfterrad
WO2006060895A1 (fr) * 2004-12-08 2006-06-15 Hossein Borazghi Procede et machine de production de produits composites thermoplastiques legers selon une maniere continue
WO2013001522A1 (fr) * 2011-06-27 2013-01-03 Kingspan Holdings (Irl) Limited Procédé et appareil de fabrication d'un panneau isolant
GB2492876B (en) * 2011-06-27 2016-03-16 Kingspan Holdings Irl Ltd A method for manufacturing an insulation panel
EP2723546B1 (fr) 2011-06-27 2018-08-22 Kingspan Holdings (IRL) Limited Procédé de fabrication de panneaux d' isolation
US10145101B2 (en) 2011-06-27 2018-12-04 Kingspan Holdings (Irl) Limited Method and apparatus for manufacturing an insulation panel

Also Published As

Publication number Publication date
AU2003209982A1 (en) 2003-09-09
GB0204385D0 (en) 2002-04-10

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