DE3419494A1 - Heatable mould surface in a form/fill/seal machine - Google Patents

Heatable mould surface in a form/fill/seal machine

Info

Publication number
DE3419494A1
DE3419494A1 DE19843419494 DE3419494A DE3419494A1 DE 3419494 A1 DE3419494 A1 DE 3419494A1 DE 19843419494 DE19843419494 DE 19843419494 DE 3419494 A DE3419494 A DE 3419494A DE 3419494 A1 DE3419494 A1 DE 3419494A1
Authority
DE
Germany
Prior art keywords
sintered metal
heatable
tool surface
contact
film
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Withdrawn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
DE19843419494
Other languages
German (de)
Inventor
Siddik Dr.rer.nat. 6680 Neunkirchen Iyimen
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.)
MYAC Fleischtechnologie GmbH
Original Assignee
MYAC Fleischtechnologie 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 MYAC Fleischtechnologie GmbH filed Critical MYAC Fleischtechnologie GmbH
Priority to DE19843419494 priority Critical patent/DE3419494A1/en
Publication of DE3419494A1 publication Critical patent/DE3419494A1/en
Withdrawn legal-status Critical Current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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3814—Porous moulds
    • 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
    • B29C51/30—Moulds
    • B29C51/36—Moulds specially adapted for vacuum forming, Manufacture thereof
    • B29C51/365—Porous moulds
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8124—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81241—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/02—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved with means for heating the material prior to forming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/08—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure
    • B65B47/10—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure by vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • 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
    • B29K2905/00—Use of metals, their alloys or their compounds, as mould material
    • B29K2905/08—Transition metals
    • B29K2905/10—Copper
    • 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
    • B29K2905/00—Use of metals, their alloys or their compounds, as mould material
    • B29K2905/08—Transition metals
    • B29K2905/12—Iron
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

In form/fill/seal machines, heatable contact or mould surfaces for warming and/or heat-sealing plastic films must be coated in order to prevent disadvantageous baking-on of the film. TFE or PTFE is used here as the coating, but these are not very resistant to abrasion. In accordance with the invention, the heatable contact surface is formed by a gas-permeable sintered metal moulding. This sintered metal moulding comprises a plurality of interconnected spherical metal particles which leave intercommunicating cavities between each other and reliably prevent baking-on of the film. If desired, the sintered metal moulding simultaneously allows a vacuum or air to be applied to the contact surface.

Description

Beschreibung description

Die Erfindung betrifft eine beheizbare Kontakt- bzw. The invention relates to a heatable contact or

Werkzeugfläche zum Erwärmen und/oder thermischen Verschwie von Kunststoffolien, insbesondere in Form-, Füll- und Verschließmaschinen.Tool surface for heating and / or thermal sealing of plastic films, especially in form, fill and seal machines.

Bei einer durch offenkundige Vorbenutzung bekanntgewordenen Form-, Füll- und Verschließmaschine ist stromaufwärts bezüglich des Materialflusses der Tiefziehstation eine Heizplatte vorgeordnet. Diese Heizplatte ist von Bohrungen durchsetzt, welche alternierend vakuumbeaufschlagbar und belüftbar sind. Die zur Ausformung der Vertiefungen bzw. Behälter vorgesehene Unterfolie wird über die Heizplatte geführt dort angesaugt und erwärmt und der so erwärmte Folienbereich in der unmittelbar nachfolgenden Tiefziehstation verformt. Um ein Anbacken der Unterfolie an der Heizplatte zu verhindern, ist letztere mit einer Beschichtung aus Tetrafluor-Äthylen (TFE) oder aus Poly-Tetrafluor-Athylen (PTFE) versehen. In the case of a form, which has become known through prior public use, The fill and seal machine is upstream of the material flow A heating plate is arranged in front of the thermoforming station. This hot plate is made of holes interspersed, which can be alternately vacuumed and ventilated. The for Forming the depressions or containers provided lower film is over the heating plate out there sucked in and heated and the film area heated in this way in the immediate subsequent deep-drawing station deformed. To prevent the lower film from sticking to the heating plate to prevent the latter with a coating of tetrafluoroethylene (TFE) or made of poly-tetrafluoro-ethylene (PTFE).

Die durch offenkundige Vorbenutzung bekanntgeworden Form-, Füll- und Verschließmaschine weist außerdem ein beheizbares Siegelwerkzeug zum Verschweißen der Deckel- bzw. Oberfolie mit dem ausgeformten Behälterrändern auf. Damit die Oberfolie nicht an dem Siegelwerkzeug anbacken kann, sind die wirksamen beheizten Werkzeugflächen ebenfalls mit einer Beschichtung aus TFE oder aus PTFE versehen. The form, filler and and the sealing machine also has a heatable sealing tool for welding the lid or upper film with the shaped container edges. So that the top film cannot stick to the sealing tool are the effective heated tool surfaces also provided with a coating made of TFE or PTFE.

Bei der bekannten Form-, Füll- und Verschließmaschine wird es als nachteilig empfunden, daß die mit TFE oder mit PTFE beschichteten beheizbaren Kontakt- bzw. Werkzeugflächen allein durch den Reibungskontakt mit den zu bearbeitenden Folien einer recht erheblichen Abnutzung unterworfen sind. In the known form, fill and seal machine it is called felt disadvantageous that with TFE or with PTFE coated heatable contact or tool surfaces solely through the frictional contact with the The foils to be processed are subject to considerable wear and tear.

Hinzu kommt, daß ein unbeabsichtigtes Anhaften von Füllgut-Teilen an den mit TFE bzw. PTFE beschichteten Kontakt- bzw.In addition, there is an unintentional adhesion of filling material parts on the TFE or PTFE coated contact or

Werkzeugflächen nicht auszuschließen ist. Die dermaßen beschichteten Flächen sind indes wegen ihrer Kratzempfindlichkeit höchstens unter Anwendung großer Sorgfalt von angebackenen Füllgutrückständen zu reinigen.Tool surfaces cannot be ruled out. The so coated However, because of their sensitivity to scratching, surfaces are at most large when used Care should be taken to remove any baked-on product residues.

Die Verschleißempfindlichkeit der mit TFE bzw. mit PTFE beschichteten beheizbaren Kontakt- bzw. Werkzeugflächen müssen deshalb bei der bekannten Form-, Füll- und Verschließmaschine in aufwendiger Weise häufig erneuert werden. The sensitivity to wear of those coated with TFE or PTFE heatable contact or tool surfaces must therefore with the known form, Filling and closing machines are often renewed in a complex manner.

Ausgehend von der eingangs beschriebenen bekannten beheizbaren Kontakt- bzw. Werkzeugfläche dieser Gattung, liegt der erfindung im Bewußtsein der Nachteile des Bekannten die Aufgabe zugrunde, verschleißunempfindliche und im übrigen leicht zu reinigende beheizbare Kontakt- bzw. Werkzeugflächen zum Erwärmen und/oder thermischen Verschweißen von Kunststoffolien zu schaffen. Entsprechend der Erfindung wurde diese Aufgabe dadurch gelöst, daß die beheizbare Kontaktfläche von einem Easdurchlssi6en Sintermetall-Formteil gebildet ist, welches aus einer Vielzahl miteinander verbundenen, zwischen sich iriteinander kommunizierende Hohlräume belassenden Metallkugelteilchen besteht. Entsprechend der Erfindung kommt die zu beheizende Folie keinesfalls flächenhaft, sondern wegen der kugeligen Struktur des Sintermetall-Formteils, nur mit einer Vielzahl von Punkten mit der beheizten Kontakt- bzw. Werkzeugfläche in Berührung. Zwischen diesen beheizten Punkten bzw. Based on the known heatable contact described above or tool surface of this type, the invention is aware of the disadvantages of the familiar the task is based on, wear-resistant and otherwise easy Heatable contact or tool surfaces to be cleaned for heating and / or thermal To create welding of plastic films. According to the invention, this The object is achieved in that the heatable contact surface is covered by an easy passage Sintered metal molding is formed, which consists of a large number of interconnected, metal spherical particles leaving intercommunicating voids between them consists. According to the invention, the film to be heated is by no means flat, but because of the spherical structure of the sintered metal molded part, only with a large number of points with the heated contact or tool surface in touch. Between these heated points or

zwischen den Kugelteilchen bilden die dort belassenen Hohlräume Wärme-Isolationsräume, welche ein Anbacken der Folie verhindern. Andererseits genügt die von der Sintermetall-Fläche ausgehende Wärme, welche Uber die Anlagepunkte sowohl als Kontaktwärme und im übrigen als Strahlungswärme übertragen wird, der Kunststoffolie die zu deren Verformung bzw. Verschweißung erforderliche Wärmemenge zuzuführen.between the spherical particles, the cavities left there form heat-insulating spaces, which prevent the film from sticking. On the other hand, that of the sintered metal surface is sufficient outgoing heat, which over the contact points both as contact heat and otherwise is transferred as radiant heat, the plastic film is responsible for its deformation or welding to supply the required amount of heat.

Die aus einer Vielzahl von Metallkugelteilchen gebildete beheizbare Kontakt- bzw. Werkzeugfläche ist völlig kratzunempfindlich und läßt sich im Bedarfsfall leicht, z.B. mit einer Bürste, reinigen. The heatable one formed from a multiplicity of metal spherical particles The contact or tool surface is completely insensitive to scratches and can be removed if necessary easy to clean, e.g. with a brush.

Der weitere Vorteil entsprechend der Erfindung besteht darin, daß derartige Sintermetall-Formteile gas- bzw. luftdurchlässig sind. Falls die Erwärmung, die Verformung oder die Verschweißung der Folie eine Kontakt- bzw. Werkzeugfläche erfordert, durch die hindurch zugleich Luft abgesaugt bzw. The further advantage according to the invention is that Such sintered metal moldings are gas or air permeable. If the warming, the deformation or welding of the film creates a contact or tool surface requires through which air is sucked off or

Luft zugeführt werden soll, so ist dieses bei dem erfindungsgemäß angewandten Sintermetall-Formteil ohne weiteres möglich.If air is to be supplied, this is the case with the one according to the invention Applied sintered metal molding easily possible.

Die das Sintermetall-Formteil bildenden und metallisch fest miteinander verbundenen Metallkugelteilchen belassen zwischen sich nämlich miteinander kommunizierende Hohlräume, durch welche in beliebiger Richtung durch das Formteil hindurch Luft abgesaugt oder Luft zugeführt werden kann.The sintered metal molding forming and metallically fixed to one another connected metal ball particles leave between them namely communicating with one another Cavities through which air passes through the molded part in any direction sucked off or air can be supplied.

Kugelstruktur aufweisende Sintermetall-Formteile finden als hochporöse Sinterwerkstoffe Verwendung, beispielsweise als Sinterbronzefilter. Beschrieben sind solche Werkstoffe beispielsweise in zwei Prospekten der Firma MIBA-SINTERMETALL AG, A-4655 VORCHDORF: "Hochporöse Interwerkstoffe" (Druck-Nr. Sintered metal molded parts with a spherical structure are found as highly porous Use of sintered materials, for example as a sintered bronze filter. Described are such materials, for example, in two brochures from MIBA-SINTERMETALL AG, A-4655 VORCHDORF: "Highly porous Interwerkstoffe" (print no.

10736) und "Präzisionsteile aus Sintermetall" (Druck-Nr.10736) and "Precision parts made of sintered metal" (print no.

23915).23915).

Wie bereits erwähnt, ist es wesentlich, daß die erfindungsgemäß angewandten Sintermetall-Formteile gas- bzw. luftdurchlässig sind. Entsprechend der Erfindung sollen daher diese Sintermetall-Formteile hinsichtlich ihrer Kugelstruktur möglichst nicht nach Art einer dichtesten Kugelpackung aufgebaut sein. Vielmehr ist es vorteilhaft, daß die Durchmesser der Metallkugelteilchen jeweils zu einem bestimmten Korngrößenbereich gehören. Diese Korngrößenbereiche sind eenstan des Anspuchs 3. As already mentioned, it is essential that the applied according to the invention Sintered metal molded parts are gas or air permeable. According to the invention should therefore these sintered metal moldings with regard to their spherical structure as possible not be constructed in the manner of a closest packing of spheres. Rather, it is advantageous that the diameter of the metal ball particles each to a certain grain size range belong. These grain size ranges are consistent with claim 3.

Weitere Erfindungsmerkmale ergeben sich aus zusätzlichen Unteransprüchen. Further features of the invention result from additional subclaims.

In den Zeichnungen ist die Erfindung anhand bevorzugter Ausfiihrungsbeispiele näher dargestellt. In the drawings, the invention is based on preferred exemplary embodiments shown in more detail.

Es zeigt: Fig. 1 die schematische Ansicht einer Form-, Füll- und Verschließmaschine, Fig. 2 die vergrößerte Darstellung eines Siegelwerkzeuges entsprechend dem in Fig. 1 mit II bezeichneten Detail und Fig. 3 die vergrößerte Darstellung entsprechend dem in Fig. 2 mit III bezeichneten Detail. It shows: Fig. 1 the schematic view of a form, fill and Closing machine, FIG. 2 shows the enlarged representation of a sealing tool accordingly the detail denoted by II in FIG. 1 and FIG. 3 the enlarged view corresponding to the detail marked III in FIG. 2.

Bei der in Fig. 1 schematisch dargestellten Form-, Füll-und Verschließmaschine 10 ist die Vorratsrolle einer Unterfolie 11 mit 12 bezeichnet. Beim vorliegenden Beispiel soll die Unterfolie als Verbundfolie aus Polyamid (PA) bestehen und oberseitig eine Siegelschicht 13 aus Polyäthylen (PE) aufweisen. In the form, fill and seal machine shown schematically in FIG 10 is the supply roll of a lower film 11 denoted by 12. In the present example, the lower film should be a composite film made of polyamide (PA) and have a sealing layer 13 made of polyethylene (PE) on the top.

Von der Vorratsrolle 12 läuft die Unterfolie 11 in Förderrichtung x über eine Umlenkrolle 14 und wird sodann über eine mit Heizelementen 16 versehene Heizplatte 15 geführt. The lower film 11 runs from the supply roll 12 in the conveying direction x via a pulley 14 and is then provided with heating elements 16 via a Heating plate 15 out.

Da die Bewegung der Unterfolie 11 intermittierend erfolgt, folgt auf jede Bewegungsphase eine Ruhephase.Since the movement of the lower film 11 takes place intermittently, follows every phase of movement a phase of rest.

In einer Ruhephase wird nun die Unterfolie 11 unter der Wirkung des durch einen Pfeil und mit V gekennzeichneten Vakuums auf die beheizte Kontaktfläche H der Heizplatte 15 gesaugt. Der Ansaugeffekt wird dadurch ermöglicht, daß die Heizplatte 15 ein Sintermetall-Formteil ist, welches aus einer Vielzahl von Metallkugelteilchen 17 besteht, welche auch - allerdings im Zusammenhang mit dem Siegelwerkzeug 18 - aus Fig. 3 analog zu ersehen sind. Ein solches Sintermetall ist hochporös, d.h. es bildet zwischen den einzelnen Kugelteilchen 17 Hohlräume 19, welche miteinander kommunizieren. Bewährt hat sich hierbei eine Kugelstruktur, bei welcher die Metallkugelteilchen 17 im wesentlichen immer gleich grot sind, um auf diese Weise eine dichteste Kugelpackung zu veri,ie;-den und zugleich die gas- bzw. luftdurchlässige Hohlraumstruktur zu gewährleisten. In a resting phase, the lower film 11 is now under the action of by an arrow and a V marked vacuum on the heated contact surface H of the heating plate 15 sucked. The suction effect is made possible by the fact that the heating plate 15 is a sintered metal molding which is made up of a plurality of metal ball particles 17 exists, which also - albeit in connection with the sealing tool 18 - can be seen analogously from FIG. 3. Such a sintered metal is highly porous, i. E. it forms between the individual spherical particles 17 cavities 19, which with one another communicate. A spherical structure in which the metal spherical particles 17 are essentially always of the same size, in order in this way to achieve the closest packing of spheres to veri, ie; -den and at the same time the gas or air permeable cavity structure to guarantee.

Anhand von Fig. 1 ist in Verbindung mit Fig. 3 ohne weiteres vorstellbar, daß die kugelig strukturierte Heizfläche H die Unterfolie 11 nicht flächenhaft sondern mit einer Vielzahl von Kontaktpunkten berührt. Die Hohlräume 19 verringern hierbei die Kontaktwärmeübertragung und verhindern zugleich ein Anbacken der Folie 11 an der Heizfläche H. Die Kontaktpunkte bewirken im Zusammenhang mit der vorhandenen Wärmestrahlung ein hinreichendes Aufheizen der Unterfolie 11, so daß die Unterfolie 11 nach Belüftung entsprechend dem Pfeil B um einen örderschritt weitertransportiert und sodann in einer nachfolden Ruhepause in der Tiefziehstation 20 zu einem oder mehreren Behältern 23 (in Form von Vertiefungen) verformt werden kann. On the basis of Fig. 1 in connection with Fig. 3 it is readily conceivable that that the spherically structured heating surface H, the lower film 11 is not flat but touched with a multitude of contact points. The cavities 19 decrease here the contact heat transfer and at the same time prevent the film 11 from sticking the heating surface H. The contact points in connection with the existing Thermal radiation sufficient heating of the lower film 11, so that the lower film 11 after ventilation according to the arrow B transported by one conveying step and then in a subsequent rest break in the deep-drawing station 20 to one or several containers 23 (in the form of depressions) can be deformed.

Die Tiefziehstation 20 besteht aus einem patrizenartigen Formoberteil 21 und aus einem matrizenartigen Formunterteil 22, welche beide entsprechend den Doppelpfeilen y gegeneinander und voneinander weg bewegbar sind. The deep drawing station 20 consists of a male mold upper part 21 and from a die-like lower mold part 22, which both correspond to the Double arrows y can be moved towards one another and away from one another.

In einem nachfolgenden Verfahrensschritt (nicht gezeigt) werden die becherförmigen Vertiefungen 23 mit dem zu verpackenden Gut, beispielsweise mit Fleisch 24, befüllt. Die becherföreigen Vertiefungen 23 sind von Becherrändern 25 umgeben. Die gefüllten becherförmigen Vertiefungen 23 werden schließlich einer Siegelstation 26 zugeführt, welche ein Unterteil 27 und ein Oberteil 28 besitzt. Oberseitig des mindestens eine becherförmige Vertiefung 23 aufnehmenden Unterteils und unterseitig des Oberteils 28 wird nun eine Oberfolie 29 von einer Vorratsrolle 30 über eine Umlenkrolle 31 hinweg durchgeführt. In a subsequent process step (not shown) the Cup-shaped recesses 23 with the goods to be packaged, for example with meat 24, filled. The cup-shaped depressions 23 are surrounded by cup edges 25. The filled cup-shaped depressions 23 finally become a sealing station 26, which has a lower part 27 and an upper part 28. Top of the at least one cup-shaped recess 23 receiving the lower part and the underside of the upper part 28 is now an upper film 29 from a supply roll 30 over a Deflection roller 31 carried away.

Unterteil 27 und Oberteil 28 können sich ebenfalls entsprechend den mit y bezeichneten Bewegungsdoppelpfeilen aufeinanderzu und voneinander weg bewegen. Wenn sich Unterteil 27 und Oberteil 28 bis in die Schließstellung hinein aufeinanderzu bewegt haben, preßt das beheizte rahmenförmige Siegelwerkzeug 18 die Oberfolie 29 gegen den auf einem Widerlagerrand 32 (häufig aus Silikonkautschuk) des Unterteils 27 aufliegenden Becherrand 25. Hierbei wird die Ober- bzw. Deckelfolie 29, welche ebenfalls aus PA besteht und unterseitig mit einer PE-Siegelschicht 33 versehen ist, mit dem Becherrand 25 verschweißt. Lower part 27 and upper part 28 can also correspond to the move double arrows marked with y towards and away from each other. When the lower part 27 and the upper part 28 approach each other up to the closed position have moved, the heated, frame-shaped sealing tool 18 presses the upper film 29 against the one on an abutment edge 32 (often made of silicone rubber) of the lower part 27 of the cup rim 25 resting on it. Here, the upper or cover film 29, which is also made of PA and has a PE sealing layer 33 on the underside is provided, welded to the cup rim 25.

Das ein Sintermetall-Formteil bildende Siegelwerkzeug 18 ruht während des Schweißvorganges - vergleichbar der tieizplatte 15 - nicht flächig sondern lediglich mit einer Vielzahl von Punkten auf der Oberfolie 29 auf. Es ergeben sich hierbei Druckschweißpunkte zwischen der beschichteten Oberfolie 29 unu der ebenfalls beschichteten Unterfolie 11. Wie bereits in Verbindung mit der Heizplatte H beschrieben, wird auch beim Siegelwerkzeug 18 ein Anbacken der Oberfolie 29 vermieden, weil die zwischen den Metallkugelteilchen vorhandenen Hohlräume 19 keine Kontaktwärme übertragen. The sealing tool 18, which forms a sintered metal molding, rests during of the welding process - comparable to the tie-down plate 15 - not flat but only with a large number of points on the upper film 29. It results here Pressure weld points between the coated upper film 29 and the likewise coated Lower film 11. As already described in connection with the heating plate H, caking of the upper film 29 also avoided in the case of the sealing tool 18 because the between Do not transfer any contact heat to the cavities 19 present in the metal ball particles.

Ein weiterer Vorteil besteht darin, daß die mit einer Vielzahl von Druckschweißpunkten durchgeführte Deckelverschweißung eine groltere Festigkeit gegen ein unbeabsicht#igtes Ablösen des Deckels ergibt, da jeder Druckschweißpunkt eine gesonderte Schweißverbindungsstelle darstellt. Im Unterschied hierzu hat sich gezeigt, daß flächenhafte Schweißverbindungen leichter aufzutrennen sind. Die mit einer Vielzahl von Druckschweißpunkten durchgeführte Deckelversiegelung eignet s ch deshalb insbesondere für solche Behälter, die bei einer fachbehandlung unter Innendruck stehen, wie z.B. während eines Kochvorganges bei Fleischkonserven. Another advantage is that with a wide variety of Pressure welding points carried out cover welding a greater strength against unintentional detachment of the cover results, since each pressure weld point is a represents a separate weld joint. In contrast, it has been shown that that extensive welded joints are easier to separate. The ones with a multitude Lid sealing carried out by pressure weld points is therefore particularly suitable for those containers that are under internal pressure during specialist treatment, e.g. during a cooking process with canned meat.

Infolge der Druckschweißpunkt-Verbindung können sich an der Siegel- bzw. Werkzeugfläche W des Siegelwerkzeugs 8 anhaftende Füllgutpartikel nicht mehr nachteilig auswirken. As a result of the pressure weld point connection, the seal or tool surface W of the sealing tool 8 adhering product particles no longer have an adverse effect.

solche Füllgutpartikel werden nämlich zwischen den einzelnen Druckschweißpunkten zu Seite gedrängt.such filling material particles are namely between the individual pressure weld points pushed aside.

Insbesondere anhand von Fig. 3 wird auch deutlich, daß an der Siegelfläche Wanhaftende Füllgutpartikel auf einfache Weise mechanisch, z.B. mittels einer Bürste, entfernt werden können. In particular with reference to FIG. 3 it is also clear that on the sealing surface Filling good particles sticking to the wall in a simple way mechanically, e.g. by means of a brush, can be removed.

.)ie Sinterretall-Formteile 15 und 18 können aus Sintermetall-Bronze bestehen, welche 90 Gewichtsprozentanteile Cu nd 10 Gewichtsprozentanteile Sn enthält. .) The sintered metal molded parts 15 and 18 can be made of sintered metal bronze exist, which contains 90 percent by weight Cu and 10 percent by weight Sn.

Zu erwähnen bleibt noch, daß gemäß Fig. 2 das rahmenförmige Siegelwerkzeug 18 an einer metallischen Trägerplatte 34 befestigt ist, welche Heizelemente 35 aufweist, von denen lediglich eines dargestellt ist. It remains to be mentioned that according to FIG. 2 the frame-shaped sealing tool 18 is attached to a metallic carrier plate 34 which has heating elements 35, only one of which is shown.

Claims (7)

Bezeichnung der Erfindung: Beheizbare Werkzeugfläche an einer Form-, Füll- und Verschließmaschine Ansprüche 1. Beheizbare Kontakt- bzw. Werkzeugfläche zum Erwärmen und/oder thermischen Verschweißen von Kunststoffolien, insbesondere in Form-, Füll- und Verschließmaschinen, dadurch gekennzeichnet, daß die beheizbare Kontaktfläche (H, W) von einem gasdurchlässigen Sintermetall-ormteil (15, 18) gebildet ist, welches aus einer Vielzahl miteinander verburdenen, zwischen sich miteinander kommunizierende Hohlräume (19) belassenden Metallkugelteilchen (17) besteht.Description of the invention: Heatable tool surface on a mold, Filling and sealing machine claims 1. Heatable contact or tool surface for heating and / or thermal welding of plastic films, in particular in form, fill and seal machines, characterized in that the heatable Contact surface (H, W) formed by a gas-permeable sintered metal molding (15, 18) is one of the multitudes that were connected with one another, between one another communicating cavities (19) leaving metal ball particles (17). 2. Beheizbare Kontakt- bzw. Werkzeugfläche nach Anspruch 1, dadurch gekennzeichnet, daß die Durchmesser der iNietallkugel teilchen (17) jeweils zu einem bestimmten Korngrößenbereich gehören. 2. Heatable contact or tool surface according to claim 1, characterized characterized in that the diameter of the iNietallkugel particles (17) each to one belong to a certain grain size range. 3. Beheizbare Kontakt- bzw. Werkzeugfläche nach Anspruch 2, dadurch gekennzeichnet, daß der Korngrößenbereich bzw. 3. Heatable contact or tool surface according to claim 2, characterized characterized in that the grain size range or der jeweilige Durchmesser der Metallkugelteilchen (17) 0,84 mm bis 1,0 mm oder 0,59 mm bis 0,84 mm oder 0,5 mm bis 0,71 mm oder 0,35 mm bis 0,59 mm oder 0,25 mm bis 0,35 mm oder 0,14 mm bis 0,25 mm oder 0,075 mm bis 0,14 mm oder 0,05 mm bis 0,09 mm oder 0,05 mm beträgt.the respective diameter of the metal ball particles (17) 0.84 mm to 1.0 mm or 0.59 mm to 0.84 mm or 0.5 mm to 0.71 mm or 0.35 mm to 0.59 mm or 0.25 mm to 0.35 mm or 0.14 mm to 0.25 mm or 0.075 mm to 0.14 mm or Is 0.05 mm to 0.09 mm or 0.05 mm. 4. Beheizbare Kontakt- bzw. Werkzeugfläche nach Anspruch 1 oder nach einem der folgenden Ansprüche, dadurch gekennzeichnet, daß das Sintermetall ein rostfreier Stahl ist. 4. Heatable contact or tool surface according to claim 1 or according to one of the following claims, characterized in that the sintered metal is a stainless steel is. 5. Beheizbare Kontakt- bzw. Werkzeugfläche nach einem der AnsprUche 1 bis 4, dadurch gekennzeichnet, daß das Sintermetall Bronze aus 90 Gewichtsprozentanteilen Cu und aus 10 ewictsprozentnteilen Sn ist. 5. Heatable contact or tool surface according to one of the claims 1 to 4, characterized in that the sintered metal bronze is made up of 90 percent by weight Cu and Sn from 10 weight percent. 6. Beheizbare Kontakt- bzw. Werkzeugfläche nach Anspruch 1 oder nach einem der folgenden Ansprüche, dadurch gekennzeichnet, daß diese (H) von einer Tiefziehfolien-Heizplatte (15) gebildet ist, welche als alternierend vakuumbeaufschlag-und belüftbares Sintermetall-Formteil bei einer Form-, Füll-und Verschließmaschine (10) der Tiefziehform (20) vorgeordnet ist. 6. Heatable contact or tool surface according to claim 1 or according to One of the following claims, characterized in that this (H) consists of a deep-drawn film heating plate (15) is formed, which is formed as an alternating vacuum-admission and ventilated sintered metal molding in a form, fill and seal machine (10) upstream of the deep-drawing mold (20) is. 7. Beheizbare Kontakt- bzw. Werkzeugfläche nach Anspruch 1 oder nach einem der folgenden Ansprüche, dadurch gekennzeichnet, daß diese (W) von einem beheizbaren Siegelwerkzeug (18) gebildet ist, welches als Sintermetall-Formteil zum Verschweissen einer Deckelfolie (29) mit einem Folienbehälterrand (25) vorgesehen ist. 7. Heatable contact or tool surface according to claim 1 or according to one of the following claims, characterized in that this (W) is heated by a Sealing tool (18) is formed, which is a sintered metal molded part for welding a cover film (29) with a film container edge (25) is provided.
DE19843419494 1984-05-25 1984-05-25 Heatable mould surface in a form/fill/seal machine Withdrawn DE3419494A1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268719A1 (en) * 1986-11-24 1988-06-01 Polytex Plastic Sa Mould for deepdraw forming thermosetting composites, and method to use this mould
EP0268720A1 (en) * 1986-11-24 1988-06-01 Polytex Plastic Sa Plastic scaffolding board, method for making it and device for carrying out the method
EP0271078A2 (en) * 1986-12-11 1988-06-15 Idemitsu Petrochemical Company Limited Thermoforming method and apparatus for thermoplastic resin sheet
US5230906A (en) * 1986-11-24 1993-07-27 Polytex Plastic Sa Method of and apparatus for manufacturing fiber-reinforced plastics articles
DE19641932C1 (en) * 1996-10-11 1998-04-02 Bock Orthopaed Ind Simple press heating plastic panels for prosthetic application
CH702855A1 (en) * 2010-03-19 2011-09-30 Soudronic Ag Process for the preparation of sealing discs.
WO2014173803A1 (en) * 2013-04-23 2014-10-30 Gea Food Solutions Germany Gmbh Packing machine with a porous agent

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GB983545A (en) * 1961-11-14 1965-02-17 Union Carbide Corp Improvements in and relating to sealing
CH580521A5 (en) * 1974-03-28 1976-10-15 Waldner Hermann Kg Two-part plastic vacuum pack - with heat-sealed reinforced rim and base
DE3009981A1 (en) * 1980-03-14 1981-10-22 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Packaging machine with film moulding station - with heating surface comprising proud and recessed areas, avoids air gaps between film and heater surface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983545A (en) * 1961-11-14 1965-02-17 Union Carbide Corp Improvements in and relating to sealing
CH580521A5 (en) * 1974-03-28 1976-10-15 Waldner Hermann Kg Two-part plastic vacuum pack - with heat-sealed reinforced rim and base
DE3009981A1 (en) * 1980-03-14 1981-10-22 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Packaging machine with film moulding station - with heating surface comprising proud and recessed areas, avoids air gaps between film and heater surface

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268719A1 (en) * 1986-11-24 1988-06-01 Polytex Plastic Sa Mould for deepdraw forming thermosetting composites, and method to use this mould
EP0268720A1 (en) * 1986-11-24 1988-06-01 Polytex Plastic Sa Plastic scaffolding board, method for making it and device for carrying out the method
US4852691A (en) * 1986-11-24 1989-08-01 Polytex Plastic Sa Scaffolding board formed from plastics materials, a method of producing same, and an apparatus for implementing the method
US5230906A (en) * 1986-11-24 1993-07-27 Polytex Plastic Sa Method of and apparatus for manufacturing fiber-reinforced plastics articles
EP0271078A2 (en) * 1986-12-11 1988-06-15 Idemitsu Petrochemical Company Limited Thermoforming method and apparatus for thermoplastic resin sheet
EP0271078A3 (en) * 1986-12-11 1989-07-19 Idemitsu Petrochemical Company Limited Thermoforming method and apparatus for thermoplastic resin sheet
DE19641932C1 (en) * 1996-10-11 1998-04-02 Bock Orthopaed Ind Simple press heating plastic panels for prosthetic application
CH702855A1 (en) * 2010-03-19 2011-09-30 Soudronic Ag Process for the preparation of sealing discs.
WO2014173803A1 (en) * 2013-04-23 2014-10-30 Gea Food Solutions Germany Gmbh Packing machine with a porous agent
CN105143052A (en) * 2013-04-23 2015-12-09 Gea食品策划德国股份有限公司 Packing machine with porous agent

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