EP3544782A1 - Procédé et dispositif de fabrication d'une pièce moulée constituée d'une mousse particulaire - Google Patents

Procédé et dispositif de fabrication d'une pièce moulée constituée d'une mousse particulaire

Info

Publication number
EP3544782A1
EP3544782A1 EP17817653.3A EP17817653A EP3544782A1 EP 3544782 A1 EP3544782 A1 EP 3544782A1 EP 17817653 A EP17817653 A EP 17817653A EP 3544782 A1 EP3544782 A1 EP 3544782A1
Authority
EP
European Patent Office
Prior art keywords
mold cavity
plastic particles
fluid
radio wave
molded part
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Withdrawn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
EP17817653.3A
Other languages
German (de)
English (en)
Inventor
Ingo Brexeler
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.)
Krallmann Kunststoffverarbeitungs GmbH
Original Assignee
Krallmann Kunststoffverarbeitungs 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 Krallmann Kunststoffverarbeitungs GmbH filed Critical Krallmann Kunststoffverarbeitungs GmbH
Publication of EP3544782A1 publication Critical patent/EP3544782A1/fr
Withdrawn legal-status Critical Current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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0861—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using radio frequency
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene

Definitions

  • the invention relates to a method for producing a molded part made of a particle foam, wherein
  • Plastic particles are introduced into a mold cavity and foamed there with the supply of heat energy and / or sintered, wherein the heat energy is introduced by means of at least one radio wave transmitter and by means of at least one fluid temperature control system, wherein radio waves are introduced by means of the radio wave transmitter in the mold cavity and at least one partial mold limiting the mold cavity is brought to a predetermined temperature by means of a tempering fluid flowing through the fluid temperature control system.
  • the invention relates to an apparatus for producing a molded part consisting of a particle foam, with a plurality of sub-tools, each having a partial cavity, the sub-cavities in cooperation form a mold cavity, wherein at least one of the sub-tools has a feed channel through which
  • CONFIRMATION COPY Plastic particles can be introduced into the mold cavity, and wherein at least one of the sub-tools has a fluid id-tempering, by means of which the part tool can be heated to a predetermined temperature, and wherein additionally at least one radio wave transmitter is provided, by means of which radio waves introduced into the mold cavity are.
  • a device for producing a molded part or component from a particle foam usually has two sub-tools, each having a Generalkavtician and can be moved together and moved apart.
  • the partial cavities form a mold cavity into which KunststoffStoff articles can be introduced, for example from EPP (Expandable Polypropylene) or from EPS (Expandable Polystyrene).
  • a steam chamber is usually formed in each case, which is supplied by one or more steam generators with hot steam. From the steam chambers, the hot steam can be introduced via steam nozzles in the mold cavity, which leads to foaming of the previously introduced into the mold cavity cavity foam particles and their welding or sintering.
  • the supplied hot steam not only heats the foam particles arranged in the mold cavity to the temperature necessary for foaming or welding or sintering, but at the same time also heats the mold parts, the wall of the mold cavity and also the wall of the steam chamber.
  • No. 3,331,899 shows a frothing tool in which plastic particles are foamed and connected on the one hand by means of radio waves and on the other hand by means of heated air, the heated air flowing around the mold cavity.
  • the problem with the combined action of radio waves and air is that there are fundamentally different modes of action that are combined. Radio waves penetrate into the pack of plastic particles and heat them up from the center. The hot air flowing around the mold cavity heats the wall of the mold cavity and thus the plastic particles located in the mold cavity from the outside. This leads to acceptable results when the molding to be formed has a constant thickness.
  • the invention has for its object to provide a method for producing a molded part made of a particle foam, with the moldings with regions of different thickness can be produced in good quality.
  • an apparatus for producing a molded part consisting of a particle foam is to be created with which the method can be carried out in a simple manner.
  • the heat energy which is necessary for foaming and / or welding or sintering of the plastic particles is introduced from two different heat sources together in the mold cavity.
  • the heat energy is introduced by means of several radio wave transmitters in the mold cavity by radiated by the radio wave transmitters radio waves and the mold cavity are supplied.
  • a plurality of fluid temperature control systems are provided, with which at least one partial mold cavity delimiting the mold cavity, and preferably all partial molds, are heated to particular predetermined temperatures by means of a temperature control fluid, for example water, flowing through the fluid temperature control systems.
  • Radio waves in the context of the invention are electromagnetic waves in a wavelength range of for example 13.56 MHz, which can lead to a dielectric heating of a non-electrically conductive material.
  • the radio waves are radiated by the radio wave transmitters, enter the mold cavity and heat the plastic particles located there so far that they foam up and at least superficially melt and connect.
  • the fluid temperature control systems are provided, which heat the sub-tools to predetermined temperatures by a temperature control, preferably a tempering liquid and in particular water flows through the sub-tool and thus brings the partially predetermined temperatures. In this way it is achieved that the wall of the mold cavity is sufficiently heated even in highly structured and bent configurations, so that the plastic particles located there reliably foam or weld or sinter, so that the molded part has a very good surface quality.
  • a plurality of fluid-tempering systems each have a closed fluid circuit and are controlled individually or in groups independently of one another by a control device.
  • a control device In this way, it is possible for the wall of the mold cavity to be partially heated to different temperatures. can be heated to achieve a meaningful for the thickness of the trainees molding energy supply.
  • the radio wave transmitter can be controlled individually or in groups independently of each other by the control device to provide the amount of introduced by means of the radio waves in the trainee molding energy partially and adapted to the geometry of the molded part to be formed.
  • a plurality of temperature sensors are provided, which are also connected to the control device.
  • the temperature sensors output temperature values to the control device which, on the basis of these temperature values, actuates the fluid temperature control systems and / or the radio wave transmitters.
  • all partial molds delimiting the mold cavity each have at least two fluid temperature control systems. In this way it can be achieved that the surface of the entire mold cavity is partially heated differently with sufficient accuracy.
  • the plastic particles are wetted with a liquid, for example water, at least superficially before being introduced into the mold cavity. It can be provided that the liquid moistening the plastic particles is evaporated by the heat energy supplied within the mold cavity. In this way, a superheated steam is generated within the mold cavity, which causes foaming the plastic particles and their welding or sintering promotes.
  • a liquid for example water
  • plastic particles after introduction into the Formteilkavtician ie, be moistened within the Formteilkavtician with a ent ⁇ speaking liquid, for example water.
  • all the mold cavities limited sub-tools each have at least two fluid temperature control.
  • the fluid temperature control serve to heat each sub-tool and thus in particular its the mold cavity delimiting surface.
  • the fluid temperature control systems can also be used to cool the corresponding sub-tools after the manufacturing process of the molding by cold water is passed through the corresponding channels within the sub-tools.
  • all partial molds delimiting the mold cavity each have at least two radio wave transmitters. In this way, it is possible to provide differently by individual control of the radio stations introduced by the radio stations in the mold cavity area and thus adapted to the geometry of the molded part to be formed.
  • the temperature sensors are arranged on the surface of the mold cavity. In this way, during the production process of the molded part, a monitoring of the temperature on the lateral surface of the molded part can take place at different points.
  • the temperature sensors output corresponding values to the control device, which actuates the fluid temperature control systems and / or the radio wave transmitters as a function of the measured temperatures.
  • a moistening unit is provided, by means of which the plastic particles can be moistened with moisture, in particular water.
  • the moistening unit which can be designed either as a bath or as a spraying device, can be arranged in one possible embodiment of the invention in the feed channel, through which the plastic particles are introduced into the mold cavity. Alternatively or additionally, however, a corresponding moistening unit may be provided both within the mold cavity and upstream of the feed channel.
  • the heat energy supplied to the plastic particles in the mold cavity and the type and quantity of the liquid moistening the plastic particles are coordinated so that the liquid moistening the plastic particles can be vaporized by the heat energy supplied within the mold cavity. In this way, a superheated steam is generated within the mold cavity, which foams the Kunststoff particles and / or welded or sintered.
  • Fig. 1 is a schematic representation of the device for
  • Fig. 2 shows the device according to Figure 1 in closed
  • Fig. 3 shows the device according to Figure 2 in the foaming and welding of the plastic particles
  • Fig. 4 shows the device according to Figure 3 with trained
  • FIG. 1 shows a device 10 for producing a molded part consisting of a particle foam, which has an upper first part tool 11 and a lower second part tool 12. On the underside of the first part tool 11 a Detailkavtician 14 is formed.
  • a First part of the tool 12 are two independent fluid tempering 15, 15a provided, which in each case comprise at least one formed in the first part 11 of the fluid channel 16, 16a, which can be traversed by a Temperiertluid, for example, hot or cold water in a closed circuit, as indicated by the arrows Fi and F 2 .
  • a first temperature sensor 22 is arranged in the first sub-tool 11, which detects the temperature of the first sub-tool 11 and emits a corresponding temperature signal via a line 21 to a control device 13 which is responsive to the supply of the tempering fluid to the fluid channels 16. 16a can influence.
  • the fluid temperature control systems 15 and 15a the first part tool 11 can be brought to a desired temperature with high accuracy in sections and held on this.
  • a plurality of second temperature sensors 26 are arranged in the wall of the partial cavity 14, which are each connected via a line 27 to the control device 13. By means of the second temperature sensors 26, the temperature can be detected and monitored on the lateral surface of the molded part to be formed.
  • the first part tool 11 On its outer side, the first part tool 11 is provided with an outer heat insulation 25.
  • Part tool 11 a housing 23 is arranged, in which two radio wave transmitters 24 are received in the illustrated embodiment.
  • Each radio wave transmitter 24 is connected via a line 28 to the control device 13.
  • the radio wave transmitter 24 can be controlled independently of each other and in terms of their Frequency and / or in terms of delivered energy.
  • radio waves can be radiated through the first part tool 11 into the partial cavity 14.
  • the first part tool 11 and the second part tool 12 face each other with their partial cavities 14 and can be moved together, wherein the partial cavities 14 in the closed state form a molded part cavity K (see Fig. 2).
  • the partial cavity 14 of the lower second partial tool 12 has a stepped cross section, so that the component produced with the device has a partially reduced thickness.
  • the upper part 1 tool 11 differs from the lower part 2 tool 12 in the illustrated embodiment in that it also has a supply channel 17 for plastic particles.
  • the feed channel 17 comprises a 1. Zuzhoukanal- section 18 formed in the first part 11, which opens into the Generalkavmaschine 14 and at its end facing away from the Generalkavmaschine 14 into a second feed channel section 19 merges with a supply, not shown, for plastic Particle is connected.
  • a moistening unit 20 is arranged, with which the plastic particles flowing through the feed channel 17 can be moistened at least superficially with a liquid, for example water, so that they enter the molded part cavity K in the moistened state.
  • the two sub-tools 11 and 12 are moved together from the state shown apart in Figure 1, wherein the two partial cavities 14 form the mold cavity K.
  • the two sub-tools 11 and 12 are heated by the respective fluid-Temperiersyteme 15, 15a and brought to predetermined temperatures, wherein the temperatures may be different depending on the geometry of the component.
  • the plastic particles are filled through the feed channel 17 in the mold cavity, as indicated by the arrow P in Figure 2.
  • the moistening unit 20 When passing through the moistening unit 20, the plastic particles are moistened with a liquid, such as water superficially.
  • the radio wave transmitters 24 are activated (see FIG. 3) and the radio waves emitted by the radio wave transmitters 24 are directed onto the plastic particles located in the mold cavity K.
  • the liquid present on the moistened plastic particles evaporates and a superheated steam is produced which foams and / or welds or sinters the plastic particles.
  • the wall of the mold cavity K heated by means of the fluid temperature control system 15 ensures that the plastic particles arranged close to the wall also foam and / or weld or sinter, so that a molded part is provided with a molded part. ner very good surface quality is generated.
  • radio wave transmitters 24 whose radio waves impinge on the region of the molding which has a smaller thickness are controlled by the control device 13 in such a way that they emit radio waves with a different frequency and a lower energy output.
  • the radio wave transmitters 24 are actuated such that a uniform heat distribution in the entire molded part cavity K results from the radio waves emitted by the radio wave transmitters 24 and from the fluid Tempering systems 15, 15a introduced heat energy is given.
  • the radio wave transmitters 24 are turned off and the two sub-tools 11 and 12 are cooled by the respective fluid temperature control 15, 15a to a demolding temperature (see Fig. 4). After reaching the demolding temperature opens the

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Pour fabriquer une pièce moulée constituée d'une mousse particulaire, des particules de matière plastique sont introduites dans une cavité (K) pour pièce moulée dans laquelle elles sont expansées et/ou frittées par apport d'énergie thermique. L'énergie thermique est appliquée au moyen de plusieurs émetteurs d'ondes radio (24) et au moyen de plusieurs systèmes de régulation de la température de fluide (15, 15a). Les émetteurs d'ondes radio (24) appliquent des ondes radio à la cavité (K) pour pièce moulée et peuvent être commandés indépendamment les uns des autres par un dispositif de commande (13). Au moins un outil partiel délimitant la cavité (K) pour pièce moulée est chauffé au moyen des systèmes de régulation de la température de fluide (15, 15a) à des températures souhaitées par endroits, les systèmes de régulation de la température de fluide (15, 15a) étant commandés indépendamment les uns des autres par le dispositif de commande (13).
EP17817653.3A 2016-11-25 2017-11-24 Procédé et dispositif de fabrication d'une pièce moulée constituée d'une mousse particulaire Withdrawn EP3544782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016014063.1A DE102016014063A1 (de) 2016-11-25 2016-11-25 Verfahren und Vorrichtung zur Herstellung eines aus einem Partikelschaum bestehenden Formteils
PCT/EP2017/001371 WO2018095572A1 (fr) 2016-11-25 2017-11-24 Procédé et dispositif de fabrication d'une pièce moulée constituée d'une mousse particulaire

Publications (1)

Publication Number Publication Date
EP3544782A1 true EP3544782A1 (fr) 2019-10-02

Family

ID=60765574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17817653.3A Withdrawn EP3544782A1 (fr) 2016-11-25 2017-11-24 Procédé et dispositif de fabrication d'une pièce moulée constituée d'une mousse particulaire

Country Status (3)

Country Link
EP (1) EP3544782A1 (fr)
DE (1) DE102016014063A1 (fr)
WO (1) WO2018095572A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110238A1 (de) * 2018-04-27 2019-10-31 Fox Velution Gmbh Werkzeug zur Verarbeitung von Kunststoffpartikelmaterial zur Herstellung eines Partikelschaumbauteils
DE102018007301B4 (de) * 2018-04-27 2021-05-12 Fox Velution Gmbh Werkzeug zur Verarbeitung von Kunststoffpartikelmaterial zur Herstellung eines Partikelschaumbauteils, Vorrichtung zur Verarbeitung von Kunststoffpartikelmaterial sowie ein Verfahren zur Verarbeitung von Kunststoffpartikelmaterial
DE102019127680A1 (de) 2019-10-15 2021-04-15 Kurtz Gmbh Werkzeug, Werkzeugsystem und Verfahren zum Herstellen von Partikelschaumstoffteilen
DE102019215845B4 (de) 2019-10-15 2023-05-11 Adidas Ag Verfahren zur Herstellung von geschäumten Partikelteilen, insbesondere für die Herstellung von Schuhsohlen
DE102020106725B4 (de) 2020-03-12 2021-10-07 Audi Aktiengesellschaft Verfahren und Werkzeug zur Herstellung eines Partikelschaum-Formteils
EP4342649A1 (fr) * 2022-09-21 2024-03-27 Knauf Industries Additive GmbH Procédé de fabrication d'une pièce moulée

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Publication number Priority date Publication date Assignee Title
US3331899A (en) * 1964-11-30 1967-07-18 Koppers Co Inc Process and apparatus for making shaped cellular articles from expandable thermoplastic resins
CA935965A (en) * 1970-01-21 1973-10-30 Sekisui Kaseihin Kogyo Kabushiki Kaisha Mold for preparing a shaped article made of foamed thermoplastic resin and method for preparation therefor
US4217325A (en) * 1977-04-21 1980-08-12 Mccord Corporation Method using modular slush molding machine
DE3032246A1 (de) * 1980-08-27 1982-04-08 Civag AG für Verpackungsforschung, Herisau Verfahren und vorrichtung zur herstellung eines formlings mit vorerhitzung des formguts
DE10009665C1 (de) * 2000-02-29 2002-01-24 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum thermischen Verbinden von Polymerschaumpartikeln
DE10117979A1 (de) * 2001-01-05 2002-08-14 Fraunhofer Ges Forschung Formwerkzeug und Verfahren zu dessen Herstellung
CN103974813A (zh) * 2011-10-06 2014-08-06 杰斯普国际有限公司 塑性粒状物质的模制
DE102015202013B4 (de) * 2015-02-05 2019-05-09 Adidas Ag Verfahren zur Herstellung eines Kunststoffformteils, Kunststoffformteil und Schuh

Also Published As

Publication number Publication date
DE102016014063A1 (de) 2018-05-30
WO2018095572A1 (fr) 2018-05-31

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