EP3233415A1 - Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet - Google Patents

Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet

Info

Publication number
EP3233415A1
EP3233415A1 EP15841014.2A EP15841014A EP3233415A1 EP 3233415 A1 EP3233415 A1 EP 3233415A1 EP 15841014 A EP15841014 A EP 15841014A EP 3233415 A1 EP3233415 A1 EP 3233415A1
Authority
EP
European Patent Office
Prior art keywords
thermoforming
preform
station
plastic
product
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Withdrawn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
EP15841014.2A
Other languages
German (de)
English (en)
Inventor
Erwin WABNIG
Gerhard Wieser
Thomas Halletz
Bernd Stein
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.)
Kiefel GmbH
Original Assignee
Kiefel 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 Kiefel GmbH filed Critical Kiefel GmbH
Publication of EP3233415A1 publication Critical patent/EP3233415A1/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Withdrawn legal-status Critical Current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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/02—Combined thermoforming and manufacture of the preform
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18—Thermoforming apparatus
    • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/261—Handling means, e.g. transfer means, feeding means
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping 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
    • 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
    • B29K2067/046—PLA, i.e. polylactic acid or polylactide
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0059—Degradable
    • B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7174—Capsules
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • 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

Definitions

  • the invention relates to a method for producing a thermoforming product and a system and a machine therefor.
  • Thermoforming is a well-known and proven process for heat-forming thin-walled plastic containers.
  • DT 2 417 270 presents a multi-stage process in which a preform is produced in a first working stage. This is done in a spray-stamping machine. By injection-compression molding, the edge of the preform is driven into a circulating clamping gripper. This is designed as a transfer ring. The transferring lies in a transfer plate. The preform can thereby be removed with the transfer plate of the machine and fed to another machine in which the thermoforming takes place.
  • thermoforming which was formerly referred to as "deep drawing”, is carried out via the connection of overpressure and / or underpressure.
  • the clamps of the transfer ring still hold the edge and can now stack the molded thermoforming product, in the example a cup.
  • the terminals are opened.
  • thermoforming product on a single multi-station machine with different tools, comprising the steps of: (a) melting and homogenizing plastic granules and providing the plastic melt to a preforming machine; Station; (b) producing a preform at the preforming station in a preform cavity, preferably by means of injection molding, injection compression molding, compression molding; (c) transferring the preform by means of a transfer support to a thermoforming station on the same machine, the thermoforming station having a thermoforming mold with a thermoforming cavity; (d) preferably heating the preform during the transfer, especially with radiant heating; (e) thermoforming the thermoformed product in the thermoforming cavity.
  • thermoforming product means that at least one thermoforming step has been carried out, in particular for bringing the hot plastic into its final form, but it is also intended that another type of deformation of the plastic be carried out beforehand First, making a preform, later performing the thermoforming step.
  • the production should take place with the at least two steps on exactly one machine.
  • the machine should have several stations, namely to carry out the at least two steps, namely first the production of the preform, later the production of the final form by thermoforming.
  • the "melting and homogenizing of plastic granules" will be carried out regularly by an extruder.
  • the extruder itself need not be part of the local machine, but can only ensure that the plastic melt is provided at the preforming station.
  • the "preforming station” has a preform cavity, thus a concave shaped tool surface for receiving the plastic melt and for direct or indirect shaping of the plastic melt.
  • a “transfer carrier” For "transferring” a “transfer carrier” should be used. This can be more complex and have mutually movable parts that can clamp, for example, an edge of the preform; but this is not necessary. Rather, a simple support structure can be used, such as a plate, with or without centering.
  • thermoforming station is to be arranged "on the same machine", which is characterized, for example, by the fact that, for example, a common safety emergency switch, a common power connection and / or a common controller for the machine control can be provided a common machine bed.
  • Another machine would be if, by means of a transfer station, a transfer of the transfer carrier from one machine to a robot, an assembly line or something else with a separate installation would take place and thereafter a transfer from this means of transport to a new machine.
  • thermoforming tool has a cavity which, by means of overpressure and / or underpressure in the workpiece or outside of the workpiece, gives the plastic the final deep-drawn shape.
  • the thermoforming station also preferably has a station-internal clamping frame, which over the workpiece against the Cavity can be stretched to create a vacuum-tight or pressure-tight space for the workpiece.
  • the first aspect of the invention makes it possible to go directly from the plastic granules to the finished thermoforming product with only a single machine, and indeed waste-free, if the preform is correspondingly dimensioned such that it no longer has a surplus area compared to the product shape ultimately to be produced.
  • edge of the preform it will be useful to usually use the edge of the preform to grasp or hang up during the transfer.
  • the edge is also the outer boundary of the preform as well as, finally, the manufactured thermoforming product in the thermoforming cavity.
  • the first aspect of the invention for the operator of such a machine is very inexpensive to implement: For it is not only - as in the prior art - the existing heat from the preform process used for the thermoforming process; rather, the heat from the extruder is already being used, and from this first heat both preforming and thermoforming can take place. Naturally, very high temperatures are required for the melting and homogenization of the plastic granules, so that an extruder in practice already operates at temperatures well above 100 ° C. to sometimes close to 300 ° C. and heats up.
  • the invention has recognized that it is not only very precise to have the handovers in a single machine; but that it is also very energy efficient. In addition, the output of production without intermediate storage of semi-finished products can be easily scaled.
  • the stated object solves a method of manufacturing a thermoforming product on one or more machines having a plurality of stations with different tools, comprising the steps of: (a) providing a quantity of plastic to a preforming station either by melting and homogenizing plastic granules and providing the plastic melt at the preforming station or by providing a solid plastic element, for example a foil section or a foil plate, at the preforming station; (b) producing a preform at the preforming station in a preform cavity, preferably by means of injection molding, injection compression molding or compression molding; (c) transferring the preform by means of a transfer carrier to a thermoforming station, wherein the thermoforming station has a thermoforming mold with a thermoforming cavity and wherein the transfer carrier holds the preform only on one side; (D) preferably heating the preform during the transfer, especially by means of a radiant heater; (e) fixing the preform to the thermoforming cavity by means of a tentering frame of the thermoforming station; (f)
  • the second aspect of the invention does not only apply when only one machine is used. Rather, several machines can be used, wherein the semi-finished products are transferred during the production process from one to the next machine directly or indirectly.
  • thermoforming station Due to the fact that the thermoforming station has its own clamping frame, the transfer tool can be made considerably simpler than known in the prior art, specifically known from DT 2 417 270. Because the clamping in a waste-free manufacturing process must always be in the so-called good range. It is therefore quite expensive to provide a gripper, which - as in DT 2 417 270 - fixed the Gut Scheme from above and below. Although it can be done without a clamping frame. For it is shown, for example, that the tool head can make the seal over the stamp.
  • the present aspect of the invention finds it advantageous to go in the other direction and instead simplify the transfer, but instead provide a conventional tenter at the thermoforming station.
  • the tenter will then close to the product area of the Thermoform product to be produced, especially the edge, when it becomes a cup-shaped product.
  • the stated object solves a method of manufacturing a thermoforming product on one or more machines having multiple stations with different tools, comprising the steps of: (a) providing a quantity of plastic to a preforming station, either by melting and homogenizing plastic granules and providing the plastic melt at the preforming station or by providing a solid plastic element, for example a film section, at the preforming station; (b) forming a preform at the preforming station in a preform cavity, preferably by injection molding, injection compression or compression molding; (c) transferring the preform by means of a transfer support to a thermoforming station, the thermoforming station comprising a thermoforming tool with a thermoforming station; having mold cavity; (d) preferably heating the preform during the transfer, in particular by means of a radiant heater; (e) thermoforming the cup-shaped product in the thermoforming cavity; (F) and with a further step that changes the amount of plastic provided, the preform and / or the thermoforming product, in particular mechanically,
  • the third aspect of the invention provides an additional treatment step which is of particular synergistic advantage.
  • Concrete proposals for carrying out this additional step follow after the presentation of the fourth aspect of the invention, because the steps are generally not only related to the third aspect of the invention, but can also refer to the first, second or fourth aspect of the invention.
  • the aspects of the invention which are independent of one another but preferably cumulated with one another are described first.
  • the further step can be placed at various points in the presented method.
  • it is intended to make the additional step on the amount of plastic in the preforming station, either before or after the manufacture or during the manufacture of the preform, and / or during the transfer of the preform to the thermoforming station and / or another station provided in addition to the preform station and the thermoforming station; and / or at the thermoforming station, there either at the preforming, ie before the thermoforming, and / or during the thermoforming or after the thermoforming.
  • it may also be more than one additional step that may be provided in addition to the steps listed in the first, second, third, or fourth aspects of the invention.
  • the stated object solves a method of manufacturing a thermoforming product on one or more machines having multiple stations and different tools, comprising the steps of: (a) fusing and homogenizing plastic granules and providing the plastic melt a preforming station; (b) producing a preform at the preforming station in a preform cavity by compression molding; (c) transferring the preform by means of a transfer support to a thermoforming station, the thermoforming station having a thermoforming mold with a thermoforming cavity; (d) preferably heating the preform during the transfer, especially with radiant heating; (e) thermoforming the thermoforming product in the thermoforming cavity.
  • the fourth aspect of the invention provides for the use of the compression-molding method for producing the preform. Prototypes of various kinds of the inventors common here have shown that this surprisingly results in the lowest-voltage states for the products produced. It should be expressly understood that the above four aspects of the invention can be combined with each other, in any number, ie combination of aspect 1 with aspect 2, of aspect 1 with aspect 3, of aspect 1 with aspect 4, of aspect 2 with aspect 3, aspect 2 with aspect 4, aspect 3 with aspect 4, any combinations of three of the aspects or the cumulation of all four aspects.
  • thermoforming can be influenced by a variety of parameters, the extent to which the material is transported into the cavity with the force.
  • a slow material ie, for example, a slow depression of the pre-stretching punch and / or a slow application of underpressure and / or overpressure
  • a relatively good material redistribution can also be achieved towards the walls of the thermoformed product;
  • more material can be taken to the thermoformed bottom when the movement is faster.
  • the printing speeds, the pressure sizes, the temperature and other parameters can be influenced on the final product.
  • thermoforming step it is possible to exert a specific influence on how the wall thicknesses of the thermoformed product ultimately result, for example by providing more raw material in strongly flowing areas simple words so a thickening in the material is provided during the manufacture of the preform.
  • the preform can therefore be produced specifically with thicknesses deviating from a uniform thickness. In a particularly simple case of a circular product, this would therefore be an annular thick spot in the preform, it being understood that a corresponding thin spot can also be provided.
  • thermoforming product is printed
  • technical prints may be involved, but on the other hand, optical prints that make the product prettier for the customer, using a printer preferably a 3D printer, a liquid jet printer such as an ink jet printer may also be used.
  • a printer preferably a 3D printer
  • a liquid jet printer such as an ink jet printer
  • the 3D printing process can be used especially when the preform is printed. Again, it is important to incorporate the knowledge about the deformation conditions in the thermoforming step in the printing. Because when the preform is printed, a geometric deformation of the printed area will usually result during the thermoforming step. A cleverly placed 3D print can take this deformation into account.
  • thermoformed product thus a product with a pronounced three-dimensional body, can be printed particularly easily with a 3D printer. This results in excellent quality because no subsequent mechanical deformation step takes place on the product anymore.
  • thermoforming cavity for the purpose of connecting the element to the product.
  • an element is positioned in the thermoforming cavity, for the purpose of connecting the element to the product.
  • in-mold labeling process it is also possible to provide a smart tag, that is to say an intelligent component, or an RFID chip.
  • the bonding of the element to the product may be at the surface of the product such that the positioned and product-connected element ultimately forms the new surface of the combined product; Alternatively, it is conceivable that the element is completely embedded in the plastic, which is deformed by the preform in the thermoforming step.
  • Another variant for a further step is to produce a multi-component preform in the preform cavity.
  • a two-component injection process may be provided, wherein one or two of the at least two components is or will be injected. For example, if only one component is injected, the second component may be inserted or otherwise applied.
  • the two-component injection leads to the fact that at least one component is introduced by means of a nozzle, while the other component is also introduced with the nozzle, with another nozzle or otherwise. This makes it possible to produce more complex products.
  • a multilayer film for thermoforming is provided.
  • a multilayer preform is preferably produced. This can be done particularly easily by spraying several layers of different plastic over one another. It can also be a combined Beitex of plastic based on finished blanks and the injection from nozzles; or several blanks can be superimposed, with or without a connecting means.
  • a multilayer film can take on different functions of the resulting film through the individual layers: For example, in the food industry, it is often desirable to provide a flavor barrier.
  • the method can preferably be carried out with the additional steps of filling and / or sealing.
  • a food capsule in particular a coffee capsule, a tea capsule, a soup capsule, another brewing capsule or for producing a soft drink or a medicament preparation
  • the method can preferably be carried out with the additional steps of filling and / or sealing.
  • the brochure Wolfgang Beier "Background: Biodegradable plastics" of the Federal Environment Agency, Germany, August 2009.
  • Food capsules, especially coffee capsules can be composted particularly well, because they generally have a fully compostable content.
  • the provision of the amount of plastic at the preforming station or the plastic granules can be carried out using at least partially, preferably completely, the use of a polylactide (PLA).
  • PLA polylactide
  • polylactides too, they generally do not decompose in nature, but within a very short time under industrial conditions complete decomposition can be brought about.
  • a barrier layer in particular having an oxide, in particular a silicon oxide or an aluminum oxide, then this can interact in particular synergy with the biodegradable plastic, the polylactide and the food contents of the food capsule ,
  • An exemplary constellation provides that a coffee capsule is produced. This is filled with coffee.
  • a barrier layer is on a simple plastic like before all polypropylene a silicon oxide (SiOLOx) applied.
  • SiOLOx silicon oxide
  • the coffee, the biodegradable plastic or the polylactide and the silicon oxide can excellently react and decompose under suitable conditions even in nature, but in any case especially quickly under industrial composting conditions.
  • edge of the preform it is proposed that it has already assumed its final shape during the transfer, in which it is clamped by the clamping frame in the Gut Scheme.
  • this step should ensure that no further reshaping is done.
  • the edge can be treated according to a further independent idea in one process step, in particular by applying a second plastic, a chewing or other further material.
  • the edge of the preform may be formed prior to thermoforming into an energy director in the sense of ultrasonic welding or friction welding.
  • An energy sensor in ultrasonic welding is an edge that is so high in its quantity that a weld bead develops only slightly or even not at all, because exactly the amount of material that is too much measured on the preform changes during welding.
  • a combined In-Mold Labeling (IML) embossing tool can be used, using a label having a color edge, wherein an embossment has a mechanical edge the color edge is brought into contour matching with the mechanical edge.
  • IML In-Mold Labeling
  • a machine for carrying out the method according to the first aspect of the invention and preferably additionally one of the further presented aspects or features is particularly advantageous, the machine having a preforming station, in particular an injection molding station, an injection-compression molding station or a compression -Molding- Station, and a thermoforming station, as well as a machine control and a transport means for transporting a preform within the machine between the preforming station and the thermoforming station, wherein the transport means preferably comprises a turntable.
  • the turntable preferably has a vertical indexing axis for approaching the various stations.
  • the machine control is set up to always advance the turntable by 90 °, thus approaching a maximum of four stations, namely on the one hand the preforming station and then directly following or indirectly following the thermoforming station, and preferably an additional treatment station and a removal station.
  • the single figure shows schematically in a perspective view a machine with a turntable and four tray-shaped supports for workpieces and with several stations.
  • the machine 1 in the figure essentially consists of various stations, which are arranged on a common bed 2 and connected via a turntable 3 in a machine direction 4.
  • the turntable 3 has a vertical indexing axis 5.
  • the turntable 3 has four workpiece trays 6 (numbered as an example). (Not labeled in detail) comprises a machine control system drives the rotary table 3 with motors (not shown in detail), so that it can turn on the turntable 3 by 90 0 Angle forward. Each workpiece tray 6 can thereby be switched to exactly four positions.
  • the machine 1 can thus approach exactly four stations with the workpiece trays 6.
  • a preforming station 7 (only shown very rudimentary) is arranged.
  • the preforming station 7 has a compression-molding tool and, at the rear, a plastic melt (not shown) from an extruder (not shown).
  • thermoforming station 8 In the machine direction 4, the station following the preforming station 7 is a thermoforming station 8.
  • the thermoforming station 8 has a top table 10 which can be moved vertically with a toggle lever drive 9 and has an upper tool 11 arranged thereon, which essentially has a pre-punching punch (not visible) and a clamping frame 12.
  • the thermoforming station 8 also has a lower tool (not shown) which, as known in the art, has a molding cavity for the thermoforming products (not shown) to be made.
  • the workpiece tablet 6 each have ten product support frames 13, 14 (numbered as an example). Each workpiece tray 6 may therefore have ten preforms and one station further ten thermoformed products wear. With each switching cycle thus ten products or semi-finished products are indexed, namely per workpiece tray 6.
  • the clamping frame 12 is designed so large that it protrudes around ten times the benefit - workpiece tray 6, at least the ten product support frames 13, 14th
  • even smaller clamping frames may be provided, each clamping one or more of the benefits, so that there are no slips through the product support frames 13, 14 in the thermoforming products during indentation of the forming die or during thermoforming.
  • thermoform products in the following manner:
  • plastic provided on the preforming station 7 in the compression molding process for example by an extruder, is deposited and a preform (not shown) is produced in the course of the process.
  • a further step can already be carried out here, for example a loading of materials, printing, edging, tillage, a second component can be added, etc.
  • the preforms produced are then removed from the preforming cavities, for example simply by lowering the preforming cavities and indexing the turntable 3.
  • the preforms are thereby switched into the thermoforming station 8.
  • the preforms are still easily deformable from the first heat.
  • the thermoforming station then performs the thermoforming in a manner known from the prior art, preferably by means of a pre-stretching punch.
  • the machine 1 will first fix the clamping frame 12 on the preforms and then act with the before the punches, but in any case only then with the under / over pressure.
  • thermoforming station 8 reopens, the turntable 3 continues switching, and the finished thermoforming products can be removed.
  • barrier layers may be useful to apply barrier layers, sealing layers, layers of paint or printing.
  • compressed air forming For molding, compressed air forming, vacuum forming, pre-stretching punch and pressure can be used. Aftertreatment may for example provide a barrier layer, printing, filling or sealing.
  • the machine makes it possible to go directly from the granulate to the thermoformed product, with minimal space requirements and high work precision and high output.
  • high stability can be achieved by orientation of the macromolecules.
  • the preform molding can control the wall thickness distribution in the finished thermoformed product.
  • the preform geometry preferably corresponds to the vertical projection of the final product, so it can be driven without waste.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un produit thermoformé, ainsi qu'une installation et une machine à cet effet. Le thermoformage est un procédé connu et éprouvé pour le formage à chaud de contenants à parois minces en plastique. L'invention propose un procédé de fabrication d'un produit thermoformé sur une machine unique comprenant plusieurs postes pourvus de différents outils, ce procédé comprenant selon un premier aspect de l'invention les étapes suivantes : (a) fusion et homogénéisation de granulés de plastique et mise en place du plastique fondu à un poste de préformage; (b) fabrication d'une préforme au poste de préformage dans une cavité de préformage, de préférence par moulage par injection, moulage par injection-compression, moulage par compression; (c) transfert de la préforme au moyen d'un support de transfert à un poste de thermoformage sur la même machine, le poste de thermoformage présentant un outil de thermoformage pourvu d'une cavité de thermoformage; (d) chauffage de préférence de la préforme pendant le transfert, notamment au moyen d'un chauffage radiant; (e) thermoformage du produit thermoformé dans la cavité de thermoformage. Le premier aspect de l'invention permet avantageusement d'obtenir directement à partir de granulés de plastique un produit thermoformé fini au moyen d'une seule machine, et notamment sans déchets lorsque la préforme est dimensionnée de manière appropriée pour ne présenter aucun surplus par rapport à la forme finale du produit à fabriquer.
EP15841014.2A 2014-12-17 2015-12-17 Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet Withdrawn EP3233415A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014018576 2014-12-17
PCT/DE2015/000599 WO2016095892A1 (fr) 2014-12-17 2015-12-17 Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet

Publications (1)

Publication Number Publication Date
EP3233415A1 true EP3233415A1 (fr) 2017-10-25

Family

ID=55486408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15841014.2A Withdrawn EP3233415A1 (fr) 2014-12-17 2015-12-17 Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet

Country Status (5)

Country Link
US (1) US20170348896A1 (fr)
EP (1) EP3233415A1 (fr)
CN (1) CN107107452A (fr)
DE (1) DE112015005674A5 (fr)
WO (1) WO2016095892A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD861751S1 (en) * 2018-05-15 2019-10-01 Mb2 Cup Development Llc Cartridge maker
WO2018112893A1 (fr) * 2016-12-23 2018-06-28 Covestro Deutschland Ag Procédé de production d'un article moulé et article moulé ainsi produit
US10807311B2 (en) 2018-09-10 2020-10-20 Rebecca Metcalf Additive manufacturing device with IR targeting and related methods
CN109093992B (zh) * 2018-10-26 2024-04-26 深圳大宇精雕科技有限公司 一种转盘式高压成型机
CN109849316B (zh) * 2019-03-29 2021-09-07 浙江麦知网络科技有限公司 一种塑料表面压花设备
DE102021103400A1 (de) 2021-02-12 2022-08-18 M + C Schiffer Gmbh Verfahren zur Herstellung eines Behälters aus Fasermaterial und Behälter aus Fasermaterial
CN113276391B (zh) * 2021-04-24 2023-08-18 浙江奥邦迪克旅游用品有限公司 一种多功能吸塑设备及一种行李箱的生产方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA816603A (en) * 1969-07-01 Hey Arie Method of and apparatus for the manufacture of hollow articles
GB1087143A (en) * 1964-11-18 1967-10-11 Unilever Ltd Method of and apparatus for the manufacture of hollow articles from thermoplastic material
FR1495851A (fr) * 1966-10-04 1967-09-22 Tech Ind Et De Construction So Procédé pour le formage d'objets, ainsi que la machine pour la mise en oeuvre de ce procédé ou procédé similaire
US3947204A (en) 1972-10-02 1976-03-30 The Dow Chemical Company Scrapless forming of plastic articles
GB1432447A (en) * 1973-04-10 1976-04-14 Daniels Stroud Ltd Process for heat-shaping thin-walled containers of plastics material and apparatus for carrying out the process
US4413964A (en) * 1978-03-13 1983-11-08 Maryland Cup Corporation Apparatus for the continuous formation of bi-axially oriented thermoplastic materials
FR2842136B1 (fr) * 2002-07-09 2004-10-01 Erca Formseal Installation pour fabriquer des objets par thermoformage a partir de pastilles de materiau thermoplastique
US7481640B1 (en) 2005-02-23 2009-01-27 Coextruded Plastic Technologies, Inc. Scrapless thermoforming machine
US7393202B1 (en) 2007-01-24 2008-07-01 Polyraz Plastics Industries Platter for thermoplastic billet
GB2498775A (en) * 2012-01-27 2013-07-31 Innovia Films Ltd In-mould labelling process
BE1022775B1 (nl) 2013-05-23 2016-09-01 Darvan Invest N.V. Werkwijze en inrichting voor het thermisch vormgeven van kunststoffen

Also Published As

Publication number Publication date
US20170348896A1 (en) 2017-12-07
DE112015005674A5 (de) 2017-09-07
CN107107452A (zh) 2017-08-29
WO2016095892A1 (fr) 2016-06-23

Similar Documents

Publication Publication Date Title
EP3233415A1 (fr) Procédé de fabrication d'un produit thermoformé et installation et machine à cet effet
DE69927151T2 (de) Verfahren und vorrichtung zum herstellen steriler verpackungsbehälter
EP0963284B1 (fr) Procede et dispositif de fabrication de recipients d'emballage en plastique, machine a emballer et recipient d'emballage
WO2007090654A1 (fr) Machine d'emballage pour la prEparation d'un emballage avec retrait dans le bord de la barquette d'emballage
DE10030010A1 (de) Verfahren zum Herstellen eines Behälters aus einer thermoplastischen Kunststofffolie u. Formwerkzeug zur Durchführung des Verfahrens
AT503682B1 (de) Verfahren und vorrichtung zur herstellung von beschichteten kunststoffformteilen
DE1291469C2 (de) Verfahren und Vorrichtung zum Herstellen eines duennwandigen, oben offenen Behaelters aus einer Folie aus thermoplastischem Kunststoff
DE2541912C2 (de) Behälter, insbesondere Verpackungsbehälter, sowie Verfahren zum Herstellen eines solchen Behälters und Vorrichtung zum Durchführen des Verfahrens
DE102005039690A1 (de) Stanz- und Siegelverfahren
DE102011102056A1 (de) Verfahren sowie Vorrichtung zum Herstellen von gefüllten Behältern aus Vorformlingen
DE2106725A1 (de) Verfahren und Vorrichtung zum Herstellen von Behaltern aus thermoplastischen Kunst stoffolien
EP3200969B1 (fr) Procédé et dispositif de stratification d'une pièce moulée fibreuse profilée
EP0647564B1 (fr) Procédé et machine pour le remplissage aseptique de denrées alimentaires
DE2842515B1 (de) Verfahren zum Herstellen von Kopfstuecken mit einer Membrane fuer Verpackungsbehaelter aus Laminat mit einer metallischen Sperrschicht und Vorrichtung zur Durchfuehrung des Verfahrens
DE3446650A1 (de) Verpackungsmaschine
EP0326846A1 (fr) Procédé et dispositif pour la fabrication d'emballages "blister"
WO2015035970A1 (fr) Procédé de fabrication d'un produit au moyen d'une unité de thermoformage ou d'assemblage, et unité de thermoformage ou d'assemblage
EP0431392B1 (fr) Procédé et dispositif pour le formage à chaud, la stérilisation, le remplissage et la fermeture de récipients
DE10257144A1 (de) Verfahren und Vorrichtung zum Tiefziehen verformbarer Materialien
DE4135935C2 (de) Verfahren und Vorrichtung zum taktweisen Thermoverformen von Kunststoffolie im Endlosband
CH554161A (de) Becher, verfahren zu dessen herstellung und vorrichtung zur durchfuehrung des verfahrens.
EP1497101B1 (fr) Procede d'emboutissage de materiaux deformables et de remplissage de corps moules
DE19737503A1 (de) Thermoformmaschine
WO2015043572A2 (fr) Installation et procédé pour le thermoformage d'une feuille en une pluralité de produits
DE69424854T2 (de) Vertikale Tiefziehvorrichtung

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20170717

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200703

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20211005