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EP4429858A1 - Dispositif pour la granulation de matière plastique - Google Patents

Dispositif pour la granulation de matière plastique

Info

Publication number
EP4429858A1
EP4429858A1 EP22801964.2A EP22801964A EP4429858A1 EP 4429858 A1 EP4429858 A1 EP 4429858A1 EP 22801964 A EP22801964 A EP 22801964A EP 4429858 A1 EP4429858 A1 EP 4429858A1
Authority
EP
European Patent Office
Prior art keywords
perforated plate
granulating
granulating head
head
ribs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22801964.2A
Other languages
German (de)
English (en)
Inventor
Gerhard Hehenberger
Dominik NEUMANN
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.)
ECON GmbH
Original Assignee
ECON GmbH
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 ECON GmbH filed Critical ECON GmbH
Publication of EP4429858A1 publication Critical patent/EP4429858A1/fr
Pending legal-status Critical Current

Links

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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
    • 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
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • 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
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
    • 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
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising

Definitions

  • the invention relates to a device for granulating plastic with a granulating head, with nozzle bodies inserted in a ring-shaped arrangement in the granulating head and protruding axially over its end face, and with a perforated plate axially in front of the granulating head and screwed to the granulating head, the passage holes of which contain the protruding nozzle bodies the perforated plate being provided with ribs running along concentric circles, keeping the perforated plate at a distance from the granulating head.
  • granulating heads are used, through which a plastic melt distributed over several melt channels is conveyed to a perforated plate in front of the granulating head, which in its through-holes accommodates nozzle bodies protruding over the granulating head for forming corresponding melt strands.
  • the strands of melt that exit through the perforated plate and solidify from the ring-shaped nozzle bodies are continuously cut with the aid of a rotating knife head into granules, which are discharged from the granulation housing, which accommodates the granulation head and the knife head, with the aid of a cooling and conveying medium.
  • the pelletizing head can be cooled via the perforated plate, which for some polymers entails the risk of the melt strands solidifying in the area of the die body.
  • the disadvantage is that due to the comparatively high temperature differences caused by the thermal insulation, the perforated plate is opposite to the granulating head Is exposed to deformations that have an adverse effect on the granulation.
  • the invention is therefore based on the object of designing the granulating head with the perforated plate in front with simple structural means such that the risk of the melt strands solidifying in the area of the nozzle bodies is avoided without adversely affecting the formation of granules.
  • the invention solves the problem in that the perforated plate has three ribs, that the nozzle body lies between the inner and the middle rib and that the perforated plate is screwed to the granulating head in the middle and between the two outer ribs.
  • heat-related deformations of the perforated plate relative to the pelletizing head can be avoided in a simple way without having to fear solidification of the melt strands in the area of the nozzle body, because the heat conduction between the perforated plate and the pelletizing head is limited to the rib area and therefore the heat transfer is at least an extent can be limited which excludes solidification of the melt strands in the area of the nozzle body.
  • the perforated plate can be centered in an advantageous manner in relation to the granulating head with the aid of the concentric ribs.
  • the granulating head can form a centering projection that interacts with the inner rib.
  • the ribs limiting the area of heat conduction can be assigned either to the granulating head or to the perforated plate. However, better design conditions are generally obtained when the perforated plate is provided with ribs projecting towards the pelletizing head.
  • Fig. 1 shows a device according to the invention in a section through the granulating head
  • FIG. 2 shows a section along the line II-II of FIG. 1 .
  • the device for granulating plastic has a granulating head 1 with inserted nozzle bodies 2 which protrude axially over its end face and are arranged at least along a pitch circle.
  • the plastic melt which is fed to the granulating head 1 via a feed channel 3 , is divided up into individual flow channels 5 which open into the nozzle bodies 2 with the aid of a distributor cone 4 .
  • the granulating head 1 is preceded by a perforated plate 6 whose passage holes 7 accommodate the nozzle bodies 2 projecting over the granulating head 1 .
  • the strands of melt emerging from the nozzle bodies 2 are continuously cut into granules with the aid of the blades of a rotating cutter head sliding along the perforated plate 7 Pelletizing housing is transported away.
  • the heat conduction between the perforated plate 6 and the pelletizing head 1 is limited to ribs 8, which are preferably carried by the perforated plate 6 are formed and are arranged in three concentric circles, as can be seen in particular in FIG.
  • the arrangement is such that the nozzle bodies 2 provided along a pitch circle come to lie between two concentric ribs 8 .
  • the screw connection between the perforated plate 6 and the granulating head 1 takes place centrally and between the two outer ribs 8 using fastening screws 9 and 10, which results in a largely uniform mechanical load on the perforated plate 6.
  • the rib 8 within the ring-shaped arrangement of the nozzle bodies 2 can advantageously be used for centering the perforated plate 6 with respect to the granulating head 1, which forms a centering shoulder 11 cooperating with this inner rib 8.
  • the rigid support of the perforated plate 6 in relation to the granulating head 1 via the ribs 8 in connection with a corresponding screw connection can cause a heat-related deformation of the perforated plate 6 that is disadvantageous for the granulate formation in Reference to the granulating head 1 are prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un dispositif pour la granulation de matière plastique, le dispositif comprenant : une tête de granulation (1) ; des corps de buses (2) qui sont introduits dans la tête de granulation (1) en un agencement annulaire et qui font saillie axialement au-delà de sa face d'extrémité ; et une plaque perforée (6) qui est située axialement devant la tête de granulation (1), qui est vissée sur la tête de granulation (1) et dont les trous traversants (7) reçoivent les corps de buse faisant saillie (2). Selon l'invention, afin de créer des conditions de travail avantageuses, des nervures (8) sont prévues entre la plaque perforée (6) et la tête de granulation (1), lesquelles nervures maintiennent la plaque perforée (6) à une distance de la tête de granulation (1).
EP22801964.2A 2021-11-10 2022-11-07 Dispositif pour la granulation de matière plastique Pending EP4429858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50894/2021A AT525675B1 (de) 2021-11-10 2021-11-10 Vorrichtung zum Granulieren von Kunststoff
PCT/AT2022/060383 WO2023081943A1 (fr) 2021-11-10 2022-11-07 Dispositif pour la granulation de matière plastique

Publications (1)

Publication Number Publication Date
EP4429858A1 true EP4429858A1 (fr) 2024-09-18

Family

ID=84331711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22801964.2A Pending EP4429858A1 (fr) 2021-11-10 2022-11-07 Dispositif pour la granulation de matière plastique

Country Status (3)

Country Link
EP (1) EP4429858A1 (fr)
AT (1) AT525675B1 (fr)
WO (1) WO2023081943A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184832A (en) * 1974-02-10 1980-01-22 Leesona Corporation Die construction
JPS5435231B2 (fr) * 1974-03-09 1979-11-01
FR2285973A1 (fr) * 1975-09-29 1976-04-23 Shell Int Research Appareil pour granuler une matiere thermoplastique synthetique
DE2814113C2 (de) * 1978-04-01 1982-09-23 Werner & Pfleiderer, 7000 Stuttgart Vorrichtung zum Granulieren von Kunststoffsträngen
DE3532937A1 (de) * 1985-09-14 1987-04-02 Werner & Pfleiderer Lochplatte fuer die unterwassergranulierung von kunststoffstraengen
US6824371B2 (en) * 2001-08-02 2004-11-30 Gala Industries, Inc. Insulation plug for underwater pelletizer die face recess
CN101288986A (zh) * 2008-06-17 2008-10-22 辽阳亿方造粒设备有限公司 一种节能型高开孔率造粒模板
DE102010030614B4 (de) * 2010-06-28 2014-02-20 Reduction Engineering Gmbh Lochplatte für einen Unterwassergranulator
DE102012012070A1 (de) * 2012-06-15 2013-12-19 Automatik Plastics Machinery Gmbh Düsenplatte für eine Granuliervorrichtung und Granuliervorrichtung mit einer Düsenplatte
EP3511139B1 (fr) * 2018-01-12 2022-08-31 Nordson Corporation Dispositif de buse pour dispositif de granulation, dispositif de granulation, et procédé associé
AT521886B1 (de) * 2018-11-29 2020-12-15 Econ Gmbh Vorrichtung zum Unterwassergranulieren von Kunststoff
DE102019107140B4 (de) * 2019-03-20 2023-06-29 Nordson Corporation Düsenanordnung mit Druckreguliervorrichtung sowie Granuliervorrichtung

Also Published As

Publication number Publication date
AT525675B1 (de) 2023-06-15
WO2023081943A1 (fr) 2023-05-19
AT525675A4 (de) 2023-06-15

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