WO2018184797A1 - Unité d'extrusion, dispositif d'extrusion de matières thermoplastiques et utilisation de ce dispositif - Google Patents

Unité d'extrusion, dispositif d'extrusion de matières thermoplastiques et utilisation de ce dispositif Download PDF

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Publication number
WO2018184797A1
WO2018184797A1 PCT/EP2018/056321 EP2018056321W WO2018184797A1 WO 2018184797 A1 WO2018184797 A1 WO 2018184797A1 EP 2018056321 W EP2018056321 W EP 2018056321W WO 2018184797 A1 WO2018184797 A1 WO 2018184797A1
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WO
WIPO (PCT)
Prior art keywords
extrusion
unit
outlet
hot runner
metering
Prior art date
Application number
PCT/EP2018/056321
Other languages
German (de)
English (en)
Inventor
Pablo Walter
Hendrik Lützen
Norman Friedrich
Lina GONZALEZ
Katrin Nisters
Thomas Härtig
Original Assignee
Henkel Ag & Co. Kgaa
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 Henkel Ag & Co. Kgaa filed Critical Henkel Ag & Co. Kgaa
Publication of WO2018184797A1 publication Critical patent/WO2018184797A1/fr

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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
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/535—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston using two or more cooperating injection rams, e.g. coaxially or alternately operating rams
    • 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
    • B29C48/269—Extrusion in non-steady condition, e.g. start-up or shut-down
    • B29C48/2694—Intermittent extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • B29C48/48—Two or more rams or pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/28—Closure devices therefor
    • B29C45/2806—Closure devices therefor consisting of needle valve systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
    • 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
    • B29C48/02—Small extruding apparatus, e.g. handheld, toy or laboratory extruders
    • 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
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/834—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
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205—Means for applying layers
    • B29C64/209—Heads; Nozzles

Definitions

  • Extrusion unit apparatus for the extrusion of thermoplastics and use of the device
  • the present invention relates to an extrusion unit for a device for the extrusion of thermoplastics. It further relates to a device for the extrusion of thermoplastics, which comprises a plasticizing unit, a metering unit and the extrusion unit. Furthermore, it relates to the use of such a device.
  • Extrusion devices are known with which thermoplastic plastics are pressed out under pressure continuously from a shaping nozzle. The force is applied to the thermoplastic material by means of one or more screw shafts. For ceramic materials also piston extruders are used. Typically, the processing temperatures set for the extrusion of thermoplastics are up to 300 ° C. At these relatively low temperatures, some thermoplastics can not be processed.
  • Thermoplastics are also processed by injection molding.
  • the plasticized plastic is injected under pressure into an injection mold and removed from this after solidification again.
  • Injection molding processes have numerous applications and are technically well developed.
  • thermoplastics with which a plurality of thermoplastics can be processed.
  • the device should be usable in different processes, in particular for extrusion, for injection molding, for mixing and for three-dimensional printing (3D printing), in particular in an FDM (Fused Deposition Modeling) process.
  • an extrusion unit for an apparatus for extruding thermoplastics, wherein the extrusion unit is formed as a separate component connectable to a metering unit of the apparatus and comprises a hot runner system having an inlet and an outlet, the inlet having an outlet the dosing unit is connectable. Furthermore, the extrusion unit comprises at least one extrusion nozzle which can be connected to the outlet of the hot runner system.
  • the extrusion unit has the advantage that it can be used with standard plasticizing units for injection molding, instead of an injection molding tool, so that extrusion can be carried out instead of an injection molding process.
  • This has the advantage that a large number of thermoplastics can be processed by means of extrusion, in particular also high-melting and / or highly filled plastics and highly viscous masses.
  • the extrusion unit has the advantage that the advantages of the highly developed and mass production suitable injection molding technology can be used.
  • the at least one extrusion die is exchangeable.
  • This has the advantage that the cross section and / or shape of the extrusion nozzle can be changed in a simple manner, so that the extrusion can be adapted to the particular application.
  • the extrusion die can be screwed into the extrusion unit.
  • the at least one extrusion die has an extrusion opening with a diameter between 0, 1 mm and 4 mm.
  • an extrusion opening with a diameter between 0, 1 mm and 4 mm.
  • the extrusion unit described extrusion nozzles with very small diameter.
  • This so-called micro-extrusion can be used, for example, for coating surfaces, for mixing materials, for extruding very small plastic strands and in 3D printing.
  • the at least one extrusion die can be heated by means of a heating unit, wherein the heating unit can be designed, for example, as a heating cartridge.
  • the heating of the extrusion nozzle has the advantage that cooling of the thermoplastic material prior to exiting the extrusion unit is prevented.
  • a housing of the extrusion unit has a cooling system.
  • This may in particular be the housing surrounding the hot runner system.
  • this housing can be cooled by means of a cooling system, wherein the cooling system can in particular have cooling channels for a cooling liquid, for example water. That has the advantage, that heat is introduced only selectively along the flow path of the thermoplastic material, which is partially thermally insulated from the environment.
  • an apparatus for the extrusion of thermoplastics comprises a plasticizing unit for melting a thermoplastic, a metering unit with a metering piston for feeding the plastic to an extrusion unit and the extrusion unit for extrusion of plastic described.
  • An inlet of the hot runner system communicates with an outlet of the dosing unit so that a flow path for plastic from the dosing unit is formed by the hot runner system and the extrusion die.
  • the device has the advantage that it allows the processing of thermoplastics with very high viscosities.
  • the extrusion of the plastic can take place, wherein the plastic at 210 ° C and a shear rate of 1 s ⁇ has a viscosity in the range of 100,000 mPas to 10,000,000 mPas.
  • the viscosity has been measured in the present case with a Malvern Rheometer (cone plate 25 mm diameter).
  • the device is suitable for the extrusion of thermoplastic materials with melt viscosities of 200,000-1,000,000 mPas.
  • the inlet of the hot runner system of the extrusion unit can be closed with a needle valve nozzle of the dosing unit.
  • the inlet of the hot runner system can thus be closed by the needle valve nozzle.
  • Needle valve systems are known from the injection molding of plastic parts and allow a clean closure of the outlet. This is advantageous because the extrusion unit formed as a separate part can be connected to the dosing unit in this way more easily.
  • the extrusion die alternatively or additionally has a needle closure.
  • Another advantage of using a needle valve nozzle and / or an extrusion nozzle with a needle valve is the provision of a control option that allows a free choice of the timing of the operation of the needle valve nozzle and / or the needle valve (open and closed).
  • the needle valve nozzle and / or the needle valve can be executed externally or self-actuated.
  • a mixing element is arranged after the outlet of the metering unit, in particular a passive element which promotes mixing of the plastic flowing past or through.
  • the device described can be used in particular for 3D printing.
  • the component to be coated is guided for example in predetermined paths under the nozzle, wherein the extrusion device is fixed.
  • This use has the advantage that it considerably increases the number of materials suitable for 3D printing, since virtually any thermoplastic material, including highly viscous materials and / or highly filled materials and / or refractory materials, can be processed by means of the extrusion device and the thermoplastics can be supplied as granules. The provision of the starting material in the form of filaments is therefore not necessary.
  • the device is also suitable for mixing materials, for providing molten material, for pressing parts and for injection molding, but also for the extrusion of filaments for 3D printing, for the extrusion of precise strands (preferably with a diameter in the Range from 0.1 mm to 3 mm) or thicker strands (preferably with a diameter in the range of 2.8 mm to 4 mm).
  • the extrusion device is thus very versatile.
  • the plastic In all the uses described, it is preferable to extrude the plastic with a viscosity of 100,000 to 10,000,000 mPas.
  • thermoplastic material is preferably to a temperature in a range between 30 ° C and 420 ° C, in particular 180 ° C to 300 ° C, melted.
  • the extrusion device has suitable means to heat the thermoplastic material accordingly. These means may in particular be a heating cartridge.
  • Conceivable is a use in particular for the following thermoplastic materials with the appropriate melt temperatures: polyamide 6 (PA 6) with a melt temperature in the range of 240 ° C and 290 ° C; Polyamide 66 (PA 66) with a melt temperature in the range of 260 ° C and 300 ° C; Polycarbonate (PC) having a melt temperature in the range of 270 ° C and 320 ° C; Polymethyl methacrylate (PMMA) having a melt temperature in the range of 200 ° C and 290 ° C; Polypropylene (PP) having a melt temperature in the range of 200 ° C and 300 ° C; Polyethylene (PE) having a melt temperature in the range of 180 ° C and 300 ° C; Polystyrene (PS) having a melt temperature in the range of 180 ° C and 280 ° C; Styrene-acrylonitrile copolymer (SAN) having a melt temperature in the range of 200 ° C and 260 ° C; Acryl
  • the melting can be carried out in particular in the plasticizing unit by heat conduction and convection, wherein the plasticizing unit as a piston-in-piston plasticizing unit is formed, so that only small shear forces act on the plastic and this is particularly gently melted.
  • the extrusion is carried out discontinuously by means of a hydraulically or pneumatically operated piston of the metering unit.
  • a hydraulically or pneumatically operated piston has the advantage that the pressure of 1000 to 1500 bar necessary for the processing of highly viscous materials and the use of very small extrusion nozzles can be provided in the region of the extrusion die.
  • the extrusion is carried out discontinuously, with the described device, for example, between 0.001 and 36 cm 3 material can be extruded.
  • the use of small extrusion nozzles and a material volume of 36 cm 3 thus results in a quasi-continuous extrusion for many applications.
  • Figure 1 a schematic sectional view through an extrusion device with a
  • FIG 2 the extrusion unit according to Figure 1 in detail.
  • the extrusion apparatus 1 according to FIG. 1 is suitable for the extrusion of thermoplastics. It has a plasticizing unit 2, a metering unit 3 and an extrusion unit 4.
  • the plasticizing unit 2 comprises a reservoir 5 in which thermoplastic plastic material, in particular in the form of a granulate, is kept. In a manner known per se, this material slides into a plasticizing region 16 in the plasticizing unit 2, where it is melted by convection heat and conveyed by means of a plasticizing piston 6 in the direction of the outlet 7 of the plasticizing unit 2. The melting of the plastic takes place in a particularly short time (for example, 36 g in 4 seconds) and thus very gently. The minimization of shear forces by the use of a plasticizing 6 instead of a screw conveyor contributes to a gentle processing of the plastic.
  • the metering unit 3 has a metering piston 8, which allows a precise metering of the extruded material.
  • the outlet 7 of the plasticizing unit 2 can be closed by means of a needle valve nozzle 9.
  • a mixing element not shown in FIG. 1 can be arranged in front of the outlet 7, a mixing element not shown in FIG. 1 can be arranged.
  • the extrusion unit 4 is arranged, which is shown in more detail in FIG.
  • the extrusion unit 4 comprises a housing 12 in which a hot runner 10 is arranged. In operation, the hot runner 10 is in communication with the outlet 7 of the plasticizing 2. Thermoplastic plastic thus passes from the outlet 7 in the hot runner 10 and from there through the extrusion die 1 1 to the extrusion opening 15. The extrusion die 1 1 is thus with an outlet 14 of the hot runner 10 connected.
  • the extrusion die 1 1 is interchangeable.
  • the extrusion unit 4 can thus be used with different extrusion dies 1 1, which have different diameters of the extrusion openings 15.
  • the extrusion unit 4 can be used with an extrusion die 11 having a diameter of 2 to 4 mm.
  • it can also be used with an extrusion die 1 1, which has a diameter of 0, 1 to 4 mm, in particular 0.2 to 1 mm and can be extruded with the smallest strands.
  • the extrusion die 1 1 can thus be replaced as needed and is therefore detachably connectable to the housing 12 of the extrusion unit 4. For example, it can be screwed into the housing 12.
  • the extrusion die 1 1 is heated in the embodiment shown by means of a heating cartridge, not shown in the figures.
  • a typical cycle time for the extrusion by means of the described extrusion device is in a range between 3 and 120 seconds, in particular in a range between 3 and 20 seconds.
  • a processing temperature between 30 and 420 ° C, in particular between 180 and 300 ° C, while quantities of 0.001 to 36 g, in particular 1 to 8 g, plasticized and having a melt viscosity between 100,000 and 10,000,000 mPas, in particular between 200,000 and 1,000,000 mPas, extruded with a strand diameter in a range between 0.1 mm and 4 mm, in particular in a range between 0.2 mm and 1 mm. Due to the gentle processing and the high possible melt temperatures, many different, even filled thermoplastics can be processed. When using hydraulically operated pistons, the processing of very high-viscosity thermoplastics is possible.
  • the entire plasticizing and dosing unit is stationary.
  • a component to be coated can be robotically guided under the extrusion die.
  • the entire device can be moved.
  • both the device and the component to be coated are moved. So it is particularly conceivable to move the component to be coated in the axes x and y, while the entire device or the extrusion nozzle is moved in the z-axis.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne une unité d'extrusion (4) pour un dispositif d'extrusion (1) de matières thermoplastiques, l'unité d'extrusion (4) étant réalisée sous la forme d'un composant séparé pouvant être relié à une unité de dosage (3) du dispositif (1) et comprenant les éléments suivants : un système de canaux chauds (10) présentant une entrée (13) et une sortie (14), l'entrée (13) étant reliée à une sortie (7) de l'unité de dosage (3); et au moins une buse d'extrusion (11) pouvant être reliée à la sortie (14) du système de canaux chauds (10). L'invention concerne en outre un dispositif d'extrusion (1) doté d'une telle unité d'extrusion (4) et l'utilisation du dispositif d'extrusion (1) en particulier pour l'impression 3D et/ou le mélange et/ou l'extrusion de boudins.
PCT/EP2018/056321 2017-04-04 2018-03-14 Unité d'extrusion, dispositif d'extrusion de matières thermoplastiques et utilisation de ce dispositif WO2018184797A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017205673.8A DE102017205673A1 (de) 2017-04-04 2017-04-04 Extrusionseinheit, Vorrichtung zur Extrusion thermoplastischer Kunststoffe und Verwendung der Vorrichtung
DE102017205673.8 2017-04-04

Publications (1)

Publication Number Publication Date
WO2018184797A1 true WO2018184797A1 (fr) 2018-10-11

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WO (1) WO2018184797A1 (fr)

Cited By (2)

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TWI684469B (zh) * 2019-07-09 2020-02-11 國立高雄科技大學 顯影管之模頭裝置
WO2022063837A1 (fr) * 2020-09-23 2022-03-31 Kraussmaffei Technologies Gmbh Procédé et appareil de fabrication additive d'un produit

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EP3730277B1 (fr) * 2019-04-23 2022-01-12 National Kaohsiung University of Science and Technology Extrudeuse en plastique avec une buse à obturateur
CN111907059B (zh) * 2019-05-08 2022-05-31 高雄科技大学 积层成形系统
DE102019219083A1 (de) * 2019-12-06 2021-06-10 Robert Bosch Gmbh Druckeinrichtung für einen 3D-Drucker
DE102021202649A1 (de) * 2021-03-18 2022-09-22 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Bereitstellen druckfähiger Schmelze zum Betreiben eines Druckkopfes für einen 3D-Drucker und Druckkopf für einen 3D-Drucker zur Durchführung des Verfahrens
IT202100013469A1 (it) * 2021-05-25 2022-11-25 Starscaspe 4D S R L Testina di stampa 3D per stampare tessuti biologici e relativo sistema di stampa 3D.

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