WO2019206448A1 - Procédé, dispositif et outil de formage permettant de thermoformer un film plat ainsi qu'installation permettant de préparer des produits semi-finis et des produits - Google Patents

Procédé, dispositif et outil de formage permettant de thermoformer un film plat ainsi qu'installation permettant de préparer des produits semi-finis et des produits Download PDF

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Publication number
WO2019206448A1
WO2019206448A1 PCT/EP2019/000128 EP2019000128W WO2019206448A1 WO 2019206448 A1 WO2019206448 A1 WO 2019206448A1 EP 2019000128 W EP2019000128 W EP 2019000128W WO 2019206448 A1 WO2019206448 A1 WO 2019206448A1
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WO
WIPO (PCT)
Prior art keywords
flat film
temperature profile
film
flat
molding tool
Prior art date
Application number
PCT/EP2019/000128
Other languages
German (de)
English (en)
Inventor
Erik HODENPIJL
Original Assignee
Kiefel Packaging B.V.
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 Packaging B.V. filed Critical Kiefel Packaging B.V.
Publication of WO2019206448A1 publication Critical patent/WO2019206448A1/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
    • 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
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • B29C51/422—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential

Definitions

  • the invention relates to a method of thermoforming a flat sheet into a product, wherein the flat sheet is heated to thermoform and formed into the product by means of a forming tool.
  • the invention also relates to a device for thermoforming a flat film with at least one molding tool, by means of which the flat film can be formed into a product, and with a device for distributing the material on the flat film.
  • the invention further relates to a molding tool for thermoforming a flat film having a first tool part, which comprises a cavity with a main access opening into which the flat film for forming a product can be formed, and with at least one further tool part for at least temporary covering the main access opening of the cavity.
  • the invention further relates to a system for producing semi-finished products and products from a thermoformable film.
  • a device for preheating flat plastic films in which a flat plastic film can be preheated from both sides by a respective heating device for the subsequent thermoforming, each heating device being made of a contact heating element consists, one of which is fixed and the other is pivotally mounted and the other pivotable contact heater is pivotable and pressed by a drive device against the fixed contact heater.
  • CH 686 820 A5 discloses a method for the thermal deformation of flat semi-finished thermoplastic composites and an apparatus for performing the method, wherein the device on the one hand means for positioning and fixing a flat semifinished product on a countertop and on the other hand means for heating, Deformation, for reconsolidation and for cooling of the flat semi-finished product comprises.
  • From DE 31 26 216 Al is still a device for the deformation of plates or film web sections made of thermoplastic material with various workstations known, wherein at least one of the workstations is provided for heating a plate or a film web section.
  • the invention has for its object to further develop generic methods and devices.
  • the object of the invention is achieved by a method for thermoforming a flat film into a product in which the flat film is heated to thermoforming and formed into the product by means of a forming tool, the method being characterized in that the flat film having a temperature profile is applied to achieve a designated material distribution on the product during thermoforming.
  • the fact that the flat film is subjected to a temperature profile, in particular in advance of the actual forming process with respect to the flat film already required during the molding process material flow to the flat film can be predetermined.
  • any strength ratios in the walls of the flat film or the product can be generated extremely precise and extremely accurate to the location Any strength ratios are characterized by different film thicknesses or wall thicknesses of the product.
  • an advantageous variant of the method for thermoforming a flat film into a product is that the flat film is heated for thermoforming and deformed by means of a molding tool, that during the forming of the flat film material distribution takes place, and that a designated material distribution on the flat film in Dependence on one of the flat film imposed temperature profile is controlled.
  • a material distribution can be influenced and even controlled by a temperature profile initiated correspondingly on the flat film
  • flat film in the context of the invention describes flat material webs or material web sections made of a thermoplastic or a plastic compound.
  • the flat film does not necessarily have to be flat, but the flat film can be bent, curved or wavy, etc., or, depending on the application, also include edges or the like.
  • the flat film may be withdrawn from a coil or the like, for example, and fed to a mold as "endless product".
  • the flat film can also be prefabricated and then supplied to the mold in the form of individual sections or benefits, these sections or benefits can be completely or for example separated from each other only by a perforation.
  • the flat film may be present on the flat film partially a plurality of identical forming areas with the same or different temperature profiles.
  • the flat film can have virtually any thickness or thickness.
  • flat films of a few millimeters thickness and thicker films can be used, the latter are then also rather plate-like, so have a much higher inherent rigidity.
  • the term "product" describes both the actual end product which is to be used here and a semifinished product which is first preformed before it is finally shaped into a final product in a further or several forming processes.
  • temperature profile is characterized according to the invention by at least two, preferably more, different warm or heated temperature ranges or temperature ranges, wherein the different temperature ranges or temperature ranges directly adjacent or spaced from each other at o- arranged in the flat film could be.
  • the temperature profile applied according to the invention causes a deviation from a possibly already existing temperature profile on the film along the transport direction of the film due to dynamic heat losses during transport or due to influences of tools in the vicinity of the film without direct contact of the tools to the film.
  • the deviation of the local temperature on the film due to the applied temperature profile is 2 ° Coder 5 ° C or lO ° C or more compared to the existing temperatures on the film without applied temperature profile.
  • the above-specified deviation may represent a maximum value or an average value in the temperature-varied region due to the temperature profile.
  • the application of the temperature profile can lead to a local heating of the film and / or to a local cooling of the film.
  • the acted upon temperature profile may have a contour depending on the particular product and the desired wall thickness, for example, a rectangular contour along the film transport direction and / or transversely thereto. Due to the temperature profile, a faster process time for thermoforming can be achieved.
  • the temperature profiles to be applied can be determined in advance be calculated with a commercially available simulation software. Alternatively, the optimum temperature distribution on the film, which is to be achieved by a corresponding admission with a suitable temperature profile, can also be determined empirically.
  • different temperature levels are arranged directly next to one another, either only on the flat foil or additionally on a correspondingly designed heating device.
  • the individual temperature ranges or temperature ranges can be geometrically different.
  • the individual temperature ranges or temperature ranges can also extend to different extents in the film cross-section of the flat film. This means that the individual temperature ranges or temperature ranges extend at different depths into the film thickness.
  • the designated material distribution bypassing a mechanically operating, with the flat film interacting Foliendehn raised, in particular a Folienvor- dehnstempel or a Foliendehnstkov done.
  • the distribution of material can be carried out without, for example, a mechanically operating stretching device being required for stretching the flat film into the cavity of the molding tool.
  • a preferred embodiment variant provides that the strength ratios are achieved exclusively by a differential pressure acting on the flat film during film-forming.
  • the differential pressure is simply provided by overpressure and / or negative pressure generated in relation to the environment, for example by compressed air.
  • the cavities can be arranged much closer to one another, for example in the case of a multiple mold, so that the productivity can be increased.
  • the flat film is formed exclusively with compressed air, wherein a designated material distribution is achieved on the film by means of the flat film impressed temperature profile and acting on the flat film of compressed air.
  • a material distribution can be influenced and even controlled by a temperature profile initiated correspondingly on the flat film in combination with a differential pressure acting on the flat film.
  • the flat film can then be converted exclusively contactless.
  • a preferred variant of the method provides that the temperature profile is generated as a function of a particular specifiable material distribution, as a result of which the temperature profile preferably depends on the contour of the product to be achieved.
  • the temperature profile can be set as a function of a material distribution to be achieved on the flat film, a semifinished product and / or a finished product.
  • the temperature profile in the present case can be generated and pronounced "only" on or in the flat film.
  • the temperature profile is generated on a heating element, as it should ultimately be pronounced on the flat film, and transferred to the flat film.
  • the temperature profile is first generated on the heating element and then imaged on the flat foil.
  • the temperature profile is generated at about the same time on the heating element and the flat film. It is understood that the temperature profile can be generated in a variety of ways on the flat film. For example, by means of thermal radiation of a distance from the film heater. As a result, differently warm temperature ranges can be well produced even on an uneven flat film.
  • the individual temperature ranges of the temperature profile can be particularly sharply and precisely delimited and defined on the flat film when one or more heating elements of a heating device are only very slightly spaced from the film surface of the flat film.
  • thermoforming machine can be used as contact heating, for example electrically heated or liquid-cooled tools that are heated or cooled globally or locally.
  • Different temperature profiles in particular also three-dimensional temperature profiles, can be realized on the flat film if the temperature profile is produced on both sides (bottom and top) of the flat film.
  • a designated material distribution on the flat film or on the product can be achieved even more precisely if the temperature profile is pronounced with more than two different temperature ranges on the flat film.
  • the temperature profile is generated on the flat film before and / or while the flat film is being formed, a material distribution can be manipulated even more varied.
  • a material distribution can be initiated and determined already from the beginning of a deformation of the flat film. For example, the surface of the film that is to be deep-drawn, additionally heated locally with the applied temperature profile, so that the thermoforming process can run faster and / or more precise.
  • material distribution can be two-stage.
  • a temperature profile is generated at least partially on a flat film, and partly on an already partially formed film, such as a semifinished product.
  • temperature profiles can be identical or different.
  • one or more temperature profiles are offset in time or generated one after the other, in particular initiated in two or more stages, in order to obtain special material distributions.
  • the temperature profile on the flat film is generated at least partially following a planar preheating of the flat film.
  • a forming process can be even more individually controlled or regulated.
  • the present device can be structurally very simple if the temperature profile is generated on the flat film at least partially outside of the mold.
  • the temperature profile is introduced by means of at least one heating element of a heater to the film.
  • the temperature profile on the flat film is generated at least partially on the molding tool and preferably in the molding tool. This allows the device to build very compact.
  • a particularly preferred embodiment provides that the temperature profile is transmitted to the flat film at least partially by means of a component, in particular an upper tool part, of the molding tool, in particular contact is transmitted.
  • a temperature profile can be generated shortly before a start of a deformation of the flat film on the flat film, whereby this temperature profile can still be very accurately and precisely pronounced on the flat film when the deformation of the flat film starts.
  • the temperature profile to be applied to the flat film is generated at least partially on regions or components, in particular on an upper tool, of the molding tool.
  • a desired temperature profile is generated at a cavity of the mold.
  • a wall bounding the cavity of the molding tool can be designed as a corresponding heating element.
  • a temperature profile can be realized on an already deforming or deformed film.
  • a temperature profile can also be formed on a closure part of the cavity and transferred to a flat, still unshaped film.
  • a further advantageous variant of the method provides that required or desirable temperature profiles for realizing a desired or designated material distribution on the flat film or on a product produced therefrom are additionally generated and / or completed by introducing deformation energy into the flat film.
  • the object of the invention according to a second aspect of the invention also by a device for thermoforming a flat film with at least one mold, by means of which the flat film is formed into a product, and with a device for distributing material on the flat film, wherein the device for distributing the material comprises means for generating at least one temperature profile on the flat film in order to achieve a material distribution which is designated as a function of the temperature profile during the thermoforming of the flat film.
  • a device for distributing the material may, for example, also comprise a pre-stretching punch or the like.
  • a device for distributing the material may comprise the means according to the invention for generating at least one temperature profile, and preferably additionally only being characterized by means for producing differential pressures acting on the flat film.
  • a flat film can already be subjected to an advantageous temperature profile in the sense of the present invention if the means for producing at least one temperature profile are arranged at least partially outside the molding tool.
  • a further advantageous embodiment variant provides a device for thermoforming a flat film with at least one molding tool, by means of which the flat film can be formed into a product, and with a device for tempering the film, by means of which the film can be heated, before the apparatus comprises means for generating at least one adjustable temperature profile on the flat film to achieve a designated material distribution during thermoforming of the flat film.
  • the object of the invention is also according to a third aspect of the invention also a mold for thermoforming a flat film with a first tool part, which comprises a cavity having a main access opening into which the flat film is moldable for producing a product, and at least a further tool part for at least temporarily covering the Hauptzugangss- opening of the cavity dissolved, wherein the mold Mitel for generating at least one adjustable temperature profile on the flat film comprises in order to achieve a designated material distribution during the thermoforming of the flat film.
  • such Mitel for generating at least one adjustable temperature profile on the flat film directly on the actual mold arranged, especially in the mold, so that temperature profiles, especially at the beginning, during insertion or even during a forming process still very precise and sharp border the flat film is pronounced.
  • the first tool part, the first mold half of the mold and the other tool part can provide the second mold half of the mold.
  • a temperature profile can be realized temporally particularly shortly before the actual forming process on the flat film when the Mitel are arranged for generating at least one adjustable temperature profile at a main access opening of a cavity of a first tool part of the mold.
  • a generation or introduction of a temperature profile on or in the flat film can be realized in a particularly timely manner with regard to a forming process of the flat film.
  • the means for generating at least one adjustable temperature profile are arranged in front of a main access opening of a cavity of a first tool part of the molding tool, preferably such that the Mitel for generating at least one adjustable temperature profile, the main access opening of the cavity can temporarily close.
  • the means for generating at least one adjustable temperature profile in the sense of the invention can be of very different design.
  • the center for generating at least one adjustable temperature profile can be arranged for example in a closure part for the cavity.
  • the means for generating at least one adjustable temperature profile are arranged in a further tool part of the molding tool. This also makes it possible to produce or introduce a temperature profile on or in the flat film very quickly on a forming process of the flat film.
  • a temperature profile can be generated, reinforced or renewed even in a mold, in particular within a cavity of the mold, on a film, when the means for generating at least one adjustable temperature profile are arranged on a wall of the cavity.
  • the Mitel can be arranged for generating at least one adjustable temperature profile, for example, on a cavity bounding the inner wall.
  • the means for generating at least one adjustable temperature profile can also be arranged in a wall of the cavity.
  • the present device or the molding tool can advantageously be further developed if the centers for generating at least one temperature profile are arranged at least partially on the molding tool and preferably in the molding tool, since the flat film can be imprinted directly before a forming process.
  • the present temperature profile is characterized by a plurality of temperature ranges. Such temperature profiles can be provided particularly simply if the device or the molding tool comprises means for generating a multi-region temperature profile with more than two different temperature ranges.
  • a preferred construction provides that the means for generating at least one temperature profile comprise at least one heating part, which has at least one flat film contact surface, whereby the means for producing the flat film can be brought into direct, in particular thermal, effective contact, so that a Temperature profile can be particularly accurate stamp on the flat film, as already explained.
  • a device for distributing material comprising at least one temperature profile comprises at least one heating part which has at least one flat film contact surface.
  • the means for generating at least one temperature profile comprise two mutually opposite heating surfaces, one or more temperature profiles can be pronounced particularly intensively on the flat foil.
  • the same or different temperature profiles opposite the flat foil can be arranged on the flat foil.
  • the device or more particularly the forming tool, includes a separator, such as a punch or cutter, for already formed products during or after forming immediately to be able to remove from the remainder of the mold on the mold.
  • a separator such as a punch or cutter
  • the present means for generating at least one adjustable temperature profile and the separating device are arranged displaceable relative to one another on the forming tool so that a separation of the products can take place if the means for generating at least one adjustable temperature profile are arranged on the forming tool.
  • such a separating device may also be decoupled from the molding tool, in particular downstream of the molding tool, that is, spatially placed behind the molding tool.
  • the means for generating at least one temperature profile are arranged on the forming tool during the forming of the flat foil.
  • the means for generating at least one temperature profile can have a maximum thermal effect on the film.
  • the object of the invention is also achieved by a system for producing semi-finished products and products from a thermoformable flat film, wherein the system is characterized by a device and / or a mold according to one of the features described herein.
  • a plant for producing semi-finished products and / or products can be operated significantly more effectively, since the production process can be substantially tightened.
  • the production process can be substantially tightened.
  • thermoforming station can not only be equipped by a separation station with a separator in addition to the actual thermoforming station, for example be, but also be supplemented by other processing stations, such as a stacking device, etc.
  • Particularly advantageous is a system with an injection molding for injection molding of the flat film, preferably directly on the device or the mold, so that the production, the provision and the transformation of the flat film can be made extremely effective.
  • a further advantage of the present invention can be seen in the fact that, due to the more compact construction, less residual film is produced and thus less waste.
  • One of the reasons for this is that conventionally the distance between individual cavities of a molding tool is defined by the space required, which, by design, also results from cooling, required rigidity and service life of the molding tool.
  • the molding tool preferably manages without expansion stamp elements or the like, the required space is reduced. This advantageously also reduces the material costs.
  • Figure 1 shows schematically a partial view of a possible plant for producing semi-finished products and products from a flat film comprising a device for thermoforming a flat film with means for generating at least one adjustable temperature profile on the flat film;
  • FIGS. 2 to 4 each schematically show a sectional view of possible embodiments of processing stations with heating or precision heating devices on a plant for producing semi-finished products and products from a flat film.
  • thermoforming a thermoformable flat film 2 is part of a thermoforming station, which is not shown in greater detail here 3 of a plant 4 for producing semi-finished products (not shown) and products 5 (see, for example, Figure 4) from the thermoformable flat film 2.
  • the unit 4 has in addition to the thermoforming station 3 via a preheating station 6 and preferably other workstations not shown here, such as for example, an assembly station arranged upstream of the preheating station 6, at which an endless material web of thermoformable plastic material is cut into prefabricated film flat elements 8, a stacking station downstream of the thermoforming station 3, at which finished products 5 are stacked, and / or another Provision station at which, for example, the finished products 5 or semi-finished products can be provided for further processing.
  • a preheating station 6 arranged upstream of the preheating station 6, at which an endless material web of thermoformable plastic material is cut into prefabricated film flat elements 8, a stacking station downstream of the thermoforming station 3, at which finished products 5 are stacked, and / or another Provision station at which, for example, the finished products 5 or semi-finished products can be provided for further processing.
  • the system 4 or the device 1 have a transport plane 9 along which the flat film 2 or the film flat elements 8 are transported in the machine direction 10 through the installation 4 or the device 1.
  • the preheating station 6 comprises a heating device 11 with upper and lower radiant heaters 12 and 13 for surface preheating of the flat film 2 held in a film holder 14. In this case, the preheating of the flat film 2 takes place without contact due to radiant heat.
  • the device 1 further comprises a precision heating device 15 which, at least in this embodiment, comprises first means 16 for generating at least one temperature profile on the flat film 2 opposite to which the flat film 2 is held in the film holder 14 of the device 1.
  • These first means 16 for producing at least one temperature profile produce differently warm zones of heat or heat regions on the flat film 2, which are preferably selected as a function of a designated material distribution on the flat film 2 or the subsequent product 5.
  • the at least one temperature profile or correspondingly different, differently warm thermal regions or heat regions are generated or selected depending on an intended designated material distribution on the flat film 2 or the subsequent product 5.
  • These first means 16 for generating at least one temperature profile comprise an upper heating part 19 and a lower heating part 20.
  • desired temperature profiles can be generated on the means 16 for generating at least one temperature profile or on the respective heating part 19 and / or 20.
  • the two heating parts 19 and 20 are each characterized by a Maisrois Design 21 and 22, which are arranged directly opposite the flat film 2.
  • the upper heating part 19 is displaceably mounted vertically above the transport plane 9 in such a way that it can be brought into operative thermal contact with the upper side 23 of the flat film 2, as a result of which the temperature profile generated at the upper heating part 19 the flat film 2 can transmit, so that the temperature profile is ultimately also produced on the film 2.
  • the lower heating part 20 is disposed below the transport plane 9 perpendicular to the flat film 2 displaced.
  • the lower heating member 20 are brought into thermal contact with the underside 24 of the flat film 2, whereby the temperature profile generated at the lower heating part 20 can also be transferred to the flat film 2, so that this temperature profile ultimately also at the Foil 2 is produced.
  • the justifyroisdon 21 and 22 of the heating parts 19 and 20 so far form each a film contact surface (not numbered separately again), to which the flat film 2 can lie flat, so that the voltage applied to the heating parts 19 and 20 respective Temperaurprofil can be particularly accurately mapped to the flat film 2.
  • the two heating parts 19 and 20 can image the same temperature profile on the flat film 2, or each of the two heating parts 19 and 20 generates a different temperature profile.
  • the different temperature profiles on the upper side 23 and the lower side 24 of the flat film 2 complement each other in such a way that only the desired desired material distribution on the flat film 2 or the product 5 desired during thermoforming can be achieved.
  • the respective temperature profile on the heating parts 19 and 20 of the means 16 for generating at least one temperature profile can be generated, and only then are the means 16 for generating at least one temperature profile brought into thermal contact with the flat film 2, thereby the previously generated at the heating parts 19 and 20 Temperaturprofi 1 directly, so contact, to the flat film 2 to transfer.
  • the two heating parts 19 and 20 are first brought into thermal contact with the top 23 and with the bottom 24 of the flat film 2 and only then is the desired temperature profile on the means 16 for generating at least one temperature profile and the flat film 2 in generated at about the same time.
  • the precision heating device 15 also comprises further means 30 for producing at least one temperature profile on the flat film 2, these further means 30 for producing at least one temperature profile advantageously being arranged directly on a mold 31 for thermoforming the flat film 2 of the device 1; that is, not outside of the mold 31, as is the case with the first means 16 for generating at least one temperature profile.
  • these means 30 for producing at least one temperature profile also remain during the forming of the flat film 2 on the mold 31.
  • the mold 31 for example, on the one hand a first tool part 32 comprising a die (not separately numbered), wherein the first tool part 32 has a cavity 33 of the die, which is accessible through a main access opening 34 for the flat film 2 during forming ,
  • the first tool part 32 embodies a lower tool half (not numbered in detail) of the molding tool 31.
  • the molding tool 31 has a further tool part 35, which comprises the further means 30 for generating at least one temperature profile.
  • the second tool part 35 embodies a lower tool half (not numbered separately) of the molding tool 31.
  • these further means 30 for producing at least one temperature profile are arranged with a heating part 36 within a clamping member 37 for the flat film 2.
  • the further means 30 for generating at least one temperature profile are structurally extremely compactly integrated into the mold 31.
  • the heating part 36 has a contact heating surface 38 or film contact surface, by means of which it can be brought into thermal contact with the upper side 23 of the flat film 2, so that thereby a temperature profile of the further means 30 for generating at least one temperature profile directly, ie contact, can be transferred to the flat film 2; namely until the onset of the forming process of the flat film 2.
  • the further means 30 for producing at least one temperature profile can also be displaced perpendicularly to the transport plane 9 or machine direction 10 in the direction of arrow 39 on the forming tool 31, so that an approach up to the flat film 2 can be accomplished without problems on the forming tool 31.
  • Such a displacement of the further means 30 for generating at least one temperature profile according to arrow direction 39 can take place together, but also independently of the clamping part 37. This results in the possibility of effective thermal contact between the heating part 36 and the flat film 2 only then build up when the flat film 2 is already securely clamped to the mold 31.
  • the precision heating device 15 has further means 30 for generating at least one temperature profile arranged directly on the forming tool 31, a temperature profile can be resharpened on the forming tool 31 immediately before the actual forming process or, alternatively, only be generated so that different warming or heating zones Heat areas, so briefly the temperature profile, during the forming process are particularly precise on the flat film 2 are available.
  • these further means 30 for producing at least one temperature profile on the flat film 2 also produce differently warm zones of heat or heat zones, which are preferably selected as a function of a designated material distribution on the flat film 2 or the subsequent product 5.
  • the at least one temperature profile or, correspondingly, the respective, differently warm thermal regions or heat regions are generated or selected as a function of a designated material distribution intended for the flat film 2 or the subsequent product 5.
  • the further means 30 for generating at least one temperature profile cumulatively or alternatively also one or a plurality of heating elements 45 (here shown only by way of example and in broken lines) which locates in the cavity 33, in particular on one or in a wall 46 delimiting the cavity 33 of the mold 31 or of the first mold part 32 (matrix) are.
  • the device 1 or the mold 31 cumulatively still with a separator 47 (only shown in dashed lines) be equipped, for example, by means of punching elements 48 (also shown only dashed) or the like, the formed film 2 or a semifinished product or product 5 produced therefrom immediately at the mold 31 of film residues (not shown) to separate.
  • the means 30 for generating at least one temperature profile relative to the separating device 47 are displaceable, or vice versa. As a result, a very compact design with simultaneous expansion of function can be ensured.
  • the flat film 2 can already be punched while a temperature profile is generated on the flat film 2.
  • the dashed line components such as the heating elements 45 and the separating device 47 and their punching elements 48, etc., were optional functional components that can be used on the device 1, by means of which it is here indicated by way of example that there are still a large number of other exemplary embodiments are possible within the meaning of the invention.
  • the present means 16 or 30 for generating at least one temperature profile on the flat film 2 can be used as an important component of a device for the material distribution of the present device 1 for thermoforming the flat film 2 represent.
  • additional mechanical working and acting stamp elements or the like for forming the flat film 2 can be dispensed with, whereby the designated material distribution can be made bypassing a mechanically working film-stretching device interacting with the flat film, in particular a film pre-punch or a film extension punch.
  • the flat film 2 should preferably be formed exclusively with compressed air, that is, as far as possible without contact, with a de signified material distribution on the flat film 2 by means of the temperature profile impressed on the flat film 2 and on the flat film 2 acting compressed air is achieved.
  • the temperature profile it should again be explicitly pointed out that it is possible for the temperature profile to be separated on a flat film or a prefabricated flat film to apply from a mold. So not as an integrated tool tempering, but outside of the tool.
  • FIG. 2 shows an exemplary embodiment of a contactless preheating station 106 with a heating device 11 comprising, in relation to a transport plane 109 of a flat film 102, an upper heating radiator 112 and a lower heating radiator 113 for uniformly preheating the flat film 102.
  • the flat film 102 becomes in this case clamped by means of a film holder 114 and a displaceable clamping member 137 in the transport plane 109.
  • the upper radiant heater 112 is mounted on an upper mounting block 150
  • the lower radiant heater 113 is mounted on a corresponding lower mounting block 151, wherein the lower mounting block 151 is supported on a lower mounting plate 152.
  • the lower mounting block 151 and the lower radiant heater 113 are surrounded by a lower base plate 153.
  • the preheat station 106 further includes an upper mounting plate 154 which fixes an upper filler plate 155 and an upper base plate 156.
  • FIGS. 3 and 4 each show exemplary embodiments with a precision heating device 115 with first means 116 for producing at least one temperature profile (see FIG. 3) on the flat film 102 and with further means 130 for producing at least one temperature profile (see FIG. 4) on the flat film 102nd
  • the first means 16 for producing at least one temperature profile comprise, in particular, an upper and a lower heating part 119 and 120, respectively, for configuring a contact heating surface 121 or 122, so that one or more temperature profiles can be produced on the flat film 102 in the sense of the invention ,
  • the upper heating part 119 is supported on a clamping ring 157, while the lower heating part 120 is mounted on a lower holder 158.
  • the further means 130 for producing at least one temperature profile are provided on a molding tool 131, wherein they comprise a single heating part 136 above the transport plane 109.
  • the molding tool 131 is still distinguished by a preforming element 160, by means of which the flat film 102 can be preformed before the flat film 102 is finally shaped by means of a differential pressure device (not further shown here).
  • first contact heating surface or film contact surface second contact heating surface or film contact surface further means for generating
  • clamping ring 158 lower holder 160 preform element

Abstract

L'invention concerne un procédé destiné à thermoformer un film plat pour obtenir un produit, selon lequel le film plat destiné au thermoformage est chauffé et est façonné pour obtenir le produit au moyen d'un outil de formage, le film plat étant soumis à un profil de température afin de réaliser une distribution désignée de matière au produit pendant le thermoformage.
PCT/EP2019/000128 2018-04-25 2019-04-24 Procédé, dispositif et outil de formage permettant de thermoformer un film plat ainsi qu'installation permettant de préparer des produits semi-finis et des produits WO2019206448A1 (fr)

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DE102018003359.8 2018-04-25
DE102018003359.8A DE102018003359A1 (de) 2018-04-25 2018-04-25 Verfahren, vorrichtung und formwerkzeug zum thermoformen einer flachen folie sowie anlage zum herstellen von halbzeugen und produkten

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WO2019206448A1 true WO2019206448A1 (fr) 2019-10-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4257335A1 (fr) 2022-04-04 2023-10-11 Henkel AG & Co. KGaA Procédé de fabrication de portions unitaires de détergent

Citations (6)

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Publication number Priority date Publication date Assignee Title
DE3126216A1 (de) 1981-07-03 1983-01-20 Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn Vorrichtung zur verformung von platten oder folienbahnabschnitten aus thermoplastischem kunststoff
DE3836788C1 (en) 1988-04-25 1989-08-31 Paul Kiefel Gmbh, 8228 Freilassing, De Apparatus for preheating plastic films
JPH05293895A (ja) * 1992-04-20 1993-11-09 Dainippon Printing Co Ltd 真空プレス積層成形装置及び方法
CH686820A5 (de) 1995-04-22 1996-07-15 Martin Teichmann Verfahren und Vorrichtung zur thermischen Verformung von Halbzeugen aus thermoformbaren Verbundwerkstoffen.
DE102008062199A1 (de) * 2008-05-29 2009-12-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Heizeinrichtung zum Thermoformen
DE102008052149A1 (de) * 2008-10-20 2010-04-22 Genima Innovations Marketing Gmbh Verfahren zur dreidimensionalen Formung thermoplastischer Folien

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041563A1 (de) * 2009-09-15 2011-03-24 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine mit mehreren Heizelementen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126216A1 (de) 1981-07-03 1983-01-20 Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn Vorrichtung zur verformung von platten oder folienbahnabschnitten aus thermoplastischem kunststoff
DE3836788C1 (en) 1988-04-25 1989-08-31 Paul Kiefel Gmbh, 8228 Freilassing, De Apparatus for preheating plastic films
JPH05293895A (ja) * 1992-04-20 1993-11-09 Dainippon Printing Co Ltd 真空プレス積層成形装置及び方法
CH686820A5 (de) 1995-04-22 1996-07-15 Martin Teichmann Verfahren und Vorrichtung zur thermischen Verformung von Halbzeugen aus thermoformbaren Verbundwerkstoffen.
DE102008062199A1 (de) * 2008-05-29 2009-12-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Heizeinrichtung zum Thermoformen
DE102008052149A1 (de) * 2008-10-20 2010-04-22 Genima Innovations Marketing Gmbh Verfahren zur dreidimensionalen Formung thermoplastischer Folien

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4257335A1 (fr) 2022-04-04 2023-10-11 Henkel AG & Co. KGaA Procédé de fabrication de portions unitaires de détergent
WO2023193965A1 (fr) 2022-04-04 2023-10-12 Henkel Ag & Co. Kgaa Procédé de fabrication d'une portion unitaire de détergent

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