DE2230090C3 - Device for welding thermoplastic plastic films - Google Patents

Device for welding thermoplastic plastic films

Info

Publication number
DE2230090C3
DE2230090C3 DE2230090A DE2230090A DE2230090C3 DE 2230090 C3 DE2230090 C3 DE 2230090C3 DE 2230090 A DE2230090 A DE 2230090A DE 2230090 A DE2230090 A DE 2230090A DE 2230090 C3 DE2230090 C3 DE 2230090C3
Authority
DE
Germany
Prior art keywords
housing
heat radiator
threaded bushing
cover
housing cover
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.)
Expired
Application number
DE2230090A
Other languages
German (de)
Other versions
DE2230090B2 (en
DE2230090A1 (en
Inventor
Hans 5216 Niederkassel Lehmacher
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE2230090A priority Critical patent/DE2230090C3/en
Publication of DE2230090A1 publication Critical patent/DE2230090A1/en
Publication of DE2230090B2 publication Critical patent/DE2230090B2/en
Application granted granted Critical
Publication of DE2230090C3 publication Critical patent/DE2230090C3/en
Expired 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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1496—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of masks
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8185—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps comprising means for compensating for the thermal expansion of the welding jaws or of the 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
    • B29C66/81—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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Verschweißen von thermoplastischen Kunststoffolien, bei welcher ein stabförmiger elektrischer Wärmestrahler in einem gekühlten, als Reflektor wirkenden Gehäuse hoher Wärmeleitfähigkeit befestigt ist, das an seiner den zu verschweißenden Folien zugewandten Seüe einen sich über die Länge des Wärmestrahlers erstreckenden und die Breite der Schweißnaht bestimmenden Schlitz aufweist, und das Gehäuse an der von den zu verschweißenden Folien abgewandten Seite einer sich über die Länge des Gehäuses erstreckenden, innen mit einer Reflexionsschicht versehenen flachen Deckel aufweist, an dem mittels über die Länge des Deckels verteilter Halteelemente der Wärmestrahler gegenüber der Entfernung zu dem Schlitz verstellbar befestigt ist, nach Patent 17 78 401. Bei dieser Vorrichtung ist eine Veränderung der Schweißnahtbreite nicht vorgesehen.The invention relates to a device for welding thermoplastic plastic films which is a rod-shaped electric heat radiator in a cooled housing that acts as a reflector high thermal conductivity is attached, the Seüe facing the foils to be welded a The slot which extends over the length of the heat radiator and determines the width of the weld seam having, and the housing on the side facing away from the foils to be welded Flat cover which extends over the length of the housing and is provided with a reflective layer on the inside has, on which by means of holding elements distributed over the length of the cover of the heat radiator opposite the distance to the slot is adjustable, according to patent 17 78 401. In this device is a Modification of the weld seam width is not intended.

Diese Vorrichtung kann außerdem ohne eine Durchführung von größeren Umbauarbeiten nur Folien von einem ganz bestimmten Material und von einer bestimmten Dicke einwandfrei miteinander verschweißen. This device can also only films from without carrying out major renovation work a very specific material and of a specific thickness weld together properly.

Der Erfindung liegt die Aufgabe zugrunde, eine mit einem elektrischen Wärmestrahler arbeitende Folienverschweißungsvorrichtung zu schaffen, die in einfacher Weise stufenlos, insbesondere während des Betriebes, an das Folienmaterial und/oder an die Foliendecke angepaßt werden kann und die in der Lage ist, ohne umständliche Umbauarbeiten Schweißnähte von verschiedenen Breiten zu erzeugen.The invention is based on the object of a film welding device that works with an electric heat radiator to create, which can be steplessly adjusted in a simple manner, especially during operation, can be adapted to the film material and / or to the film cover and which is able to without cumbersome conversion work to produce weld seams of various widths.

Zur Lösung dieser Aufgabe wird bei einer Vorrichtung nach dem Oberbegriff des Anspruches 1 erfindungsgemäß vorgeschlagen, daß der Wärmestrahler in seinem Abstand zum Längsschlitz des Gehäuses stufenlos verstellbar ist.In order to achieve this object, the invention relates to a device according to the preamble of claim 1 suggested that the heat radiator in its distance from the longitudinal slot of the housing is continuously adjustable.

Mit der erfindungsgemäßen Vorrichtung läßt sich der Wärmestrahler in einfacher Weise exakt verschiedenem Folienmaterial und/oder verschiedenen Foliendicken anpassen. Bei großer Foliendicke wird der Abstand zwischen dem Wärmestrahler und den Folien verringert, während dieser Abstand bei geringer Foliendicke vergrößert wird.With the device according to the invention, the radiant heater can be used in exactly different ways in a simple manner Adapt film material and / or different film thicknesses. If the film is thick, the distance will be between the heat radiator and the foils is reduced, while this distance is reduced when the foil is thin is enlarged.

Durch Annäherung des Wärmestrahlers an den Längsschlitz des Gehäuses wird die Schweißnaht breiter, durch größeren Abstand des Wärmestrahlers an den Längsschlitz wird die Schweißnaht schmaler. Auf diese Weise lassen sich einwandfreie Kunststoffolien-Schweißnähte erzeugen.When the heat radiator approaches the longitudinal slot of the housing, the weld seam is created wider, the greater the distance between the radiant heater and the longitudinal slot makes the weld seam narrower. on In this way, perfect plastic film weld seams can be produced.

Die stufenlose Verstellbarkeit des Wärmestrahlers im Gehäusehohlraum kann grundsätzlich durch eine Bewegungsschraube gewährleistet sein, die einerseits im Gehäuse der Vorrichtung sitzt und die andererseits in eine Halterung des Wärmestrahlers eingreift. Insbesondere kann der stabförmige Wärmestrahler in gleichmäßigen Abständen von Halteelementen erfaßt sein, die jeweils mit einer Gewindebuchse verbunden sind, welche in einer Gewindebohrung des Gehäusedeckels verdrehbar ist. Durch Verdrehen der Gewindebuchse kann der Abstand zwischen dem Wärmestrahler und dem Längsschlitz des Gehäuses stufenlos verstellt werdenThe infinitely variable adjustability of the heat radiator in the housing cavity can in principle by a Movement screw be guaranteed, which sits on the one hand in the housing of the device and on the other hand in a holder of the radiant heater engages. In particular, the rod-shaped heat radiator can be in uniform Distances of holding elements to be recorded, which are each connected to a threaded bushing, which can be rotated in a threaded hole in the housing cover. By turning the threaded bushing the distance between the radiant heater and the longitudinal slot of the housing can be continuously adjusted will

Außerdem können die Halteelemente des Wärme-Strahlers jeweils mit einem Zwischenstück verbunden sein, das am Außenumfang eine Ringnut aufweist, mit welcher es im Inneren der Gewindebuchse an einem von dessen Innenwand vorspringenden Ringbund gehalten ist. Jedes Halteelement weißt mindestens ein Paar von sich gegenüberliegenden zangenartigen Armen auf, die den oberen Bereich des Wärmestrahlers umgreifen. So kann beispielsweise jedes Halteelement zwei Paare zangenartiger Arme aufweisen. Jedes Halteelement istIn addition, the holding elements of the heat radiator can each be connected to an intermediate piece be, which has an annular groove on the outer circumference, with which it is inside the threaded bushing at one of whose inner wall protruding collar is held. Each holding element knows at least one pair of opposing pincer-like arms that grip around the upper area of the radiant heater. So For example, each holding element can have two pairs of pincer-like arms. Each retaining element is

mittels einer Schraube mit dem Zwischenstück verbunden und besteht aus einem gegen elektrischen Strom und Wärme isolierenden Material. Jedes Halteelement kann auch mit dem Zwischenstück einstückig sein.connected to the intermediate piece by means of a screw and consists of a counter-current and heat insulating material. Each holding element can also be made in one piece with the intermediate piece.

Zur einfachen Verdrehung der Gewindebuchse kann deren obere, die Gehäusedeckeloberseite überragende Stirnseite zwei sich gegenüberliegende Schlitze zum Einführen eines Werkzeuges, z. B. Schraubenzieher, aufweisen. Zur Verdrehsicherung der Gewindebuchse kann um deren Oberteil eine Mutter geschraubt sein, die gegen die Gehäusedeckeloberfläche spannbar ist. Vorteilhafterweise ist sowohl der Gehäuseunterteil als auch der Gehäusedeckel von Kühlkanälen durchzogen.For simple rotation of the threaded bushing, its upper side, protruding from the upper side of the housing cover, can be used Front side two opposing slots for inserting a tool, e.g. B. screwdriver, exhibit. To prevent rotation of the threaded bushing, a nut can be screwed around its upper part, which can be clamped against the surface of the housing cover. Advantageously, both the lower housing part as the housing cover also has cooling channels running through it.

Die Erfindung und deren weitere Vorteile werden anhand der in den Figuren schematisch dargestellten "5 Ausführungsbeispiele näher erläutert. Es zeigtThe invention and its further advantages are illustrated schematically in the figures "5 Embodiments explained in more detail. It shows

F i g. 1 eine Folienschweißvorrichtung in perspektivischer Darstellung und teilweise aufgeschnitten,F i g. 1 shows a film welding device in perspective Representation and partially cut open,

Fig.2 einen Vertikalschnitt längs der Lhie H-II der Fig. 1.2 shows a vertical section along the line H-II of Fig. 1.

Bei der Schweißvorrichtung nach den F i g. 1 und 2 ist ein stabförmiger, elektrisch erhitzbarer Wärmestrahler 10 in einem gekühlten, als Reflektor ausgebildeten Gehäuse Il angeordnet, welches an seiner den zu verschweißenden Folien 12,13 zugewandten Seite einen sich über die Länge des Strahlers erstreckenden Schlitz 14 aufweist, durch den hindurch die Strahlungswärme aus dem Hohlraum des Gehäuses 11 nach außen austritt. Diese Strahlungswärme verschweißt die Längskanten des aus thermoplastischer Kunststoffolie bestehenden Halbschlauches 12,13 zu einem geschlossenen Schlauch unter Ausbildung der Längsschweißnaht 15. Es versteht sich, daß mit der erfindungsgemäßen Vorrichtung auch Querabschweißungen vorgenommen werden können.In the case of the welding device according to FIGS. 1 and 2 is a rod-shaped, electrically heatable radiant heater 10 arranged in a cooled, designed as a reflector housing II, which at its to Welding foils 12, 13 facing a side has the length of the radiator extending slot 14 through which the radiant heat emerges from the cavity of the housing 11 to the outside. This radiant heat welds the longitudinal edges of the thermoplastic plastic film Half-hose 12, 13 to form a closed hose with the formation of the longitudinal weld seam 15. It understands that transverse welds can also be made with the device according to the invention.

Wie aus Fig. 2 hervorgeht, besteht das Gehäuse 11 aus einem Gehäuseuntertei! 16 und aus einem Gehäusedeckel 17. Beide Gehäuseteile sind zu ihrer Kühlung von wasserführenden Kanälen 18, 19, 20, 21 durchzogen. Der Wärmestrahler 10 ist metallisch und besteht beispielsweise aus einer Chrom-Vanadium-Legierung. Nach F i g. 2 ist er rohrförmig; er kann aber auch aus einem massiven Rundstab oder aus einem Rohr bestehen, dessen Oberseite einen Längsschlitz aufweist. Die Innenflächen des Gehäusehohlraums, in welchem sich der Wärmestrahler 10 befindet, sind reflektierend ausgebildet, damit die Wärmerückstrahlung dieser Flächen zur Folienschweißung ebenfalls beitrage.As can be seen from Fig. 2, the housing 11 consists of a housing sub! 16 and from one Housing cover 17. Both housing parts are cooled by water-carrying channels 18, 19, 20, 21 streaked. The heat radiator 10 is metallic and consists, for example, of a chrome-vanadium alloy. According to FIG. 2 it is tubular; but it can also be made from a solid round rod or from a tube exist, the top of which has a longitudinal slot. The inner surfaces of the housing cavity in which if the heat radiator 10 is located, are designed to be reflective, so that the heat reflected back from them Areas for film welding also contribute.

Dem elektrischen Wärmestrahler 10 wird über die Anschlußklemmen 22 und 23 Strom zugeführt Der Wärmestrahler 10 ist in gleichmäßigen Abständen von Halteelementen 24,25 erfaßt. Jedes Halteelement weist zwei Paare von sich gegenüberliegenden, zangenartigen Armen 26,27 und 28, 29 auf, die den oberen Bereich des Wärmestrahlers 10 umgreifen. Mit 30 ist in F i g. 2 der Hohlkanal des Gehäuses 11 bezeichnet Jedes Halteelement 24, 25, welches aus einem gegen elektrischen Strom und Wärme isolierenden Material besteht, ist mittels einer Schraube 31 an einem zweigeteilten Zwischenstück 32 befestigt Das Zwischenstück 32 der F i g. 2 sowie auch jedes andere Zwischenstück weist am Außenumfang eine Ringnut auf, mit welcher es im Inneren einer Gewindebuchse 33 an einem von dessen Innenwand vorspringenden Ringbund 34 gehalten ist. Die Gewindebuchse 33 ist in einer Gewindebohrung 35 des Gehäusedeckels 17 verdrehbar.The electric heat radiator 10 is supplied via the terminals 22 and 23 of the current Heat radiator 10 is detected by holding elements 24, 25 at regular intervals. Each holding element has two pairs of opposing, pincer-like arms 26, 27 and 28, 29, which cover the upper part of the Grip around the heat radiator 10. At 30 in FIG. 2 the hollow channel of the housing 11 denotes each holding element 24, 25, which consists of a material that insulates against electrical current and heat fastened by means of a screw 31 to a two-part intermediate piece 32. The intermediate piece 32 of the F i g. 2 as well as every other intermediate piece has an annular groove on the outer circumference, with which it is in the Inside a threaded bushing 33 is held on an annular collar 34 projecting from its inner wall. The threaded bushing 33 can be rotated in a threaded bore 35 of the housing cover 17.

Zur Verdrehung der Gewindebuchse 33 weist deren obere, die Gehäusedeckeloberseite überragende Stirnseite zwei sich gegenüberliegende Schlitze 36, 37 zum Einführen eines Werkzeuges, z. B. Schraubenziehers, auf. Zur Verdrehsicherung der Gewindebuchse 33 ibt um deren Oberteil eine Mutter 38 geschraubt, die gegen die Oberfläche des Gehäusedeckels 17 spannbar ist.In order to rotate the threaded bushing 33, its upper end face protruding beyond the top of the housing cover has two opposing slots 36, 37 for inserting a tool, e.g. B. screwdriver, on. To prevent the threaded bushing 33 from twisting, a nut 38 is screwed around its upper part, which against the Surface of the housing cover 17 can be tensioned.

Zur stufenlosen Verstellung des Abstandes zwischen dem elektrischen Wärmestrahler 10 und dem Längsschlitz 14 des Gehäuses, die sogar während des Schweißbetriebes erfolgen kann, braucht nur zunächst die Mutter 38 gelockert und dann mittels eines Schraubenziehers die Gewindebuchse 33 in die gewünschte Richtung gedreht zu werden, wonach dann nach Erreichung des gewünschten Abstandes die Mutter 38 wieder angezogen wird.For stepless adjustment of the distance between the electric heat radiator 10 and the longitudinal slot 14 of the housing, which can even be done during the welding operation, only needs initially the nut 38 loosened and then the threaded bushing 33 in the desired position using a screwdriver Direction to be rotated, after which the nut after reaching the desired distance 38 is tightened again.

In Fig. 1 sind Gewindebuchse und Mutter der anderen dargestellten Halterung des Wärmestrahlers mit den Bezugsziffern 39 und 40 versehen. Zum Ausgleich von Wärmedehnungen des elektrischen Wärmestrahlers 10 ist dieser dehnungsbeweglich gelagert.In Fig. 1, the threaded bushing and nut of the other holder of the heat radiator are shown provided with the reference numerals 39 and 40. To compensate for thermal expansion of the electrical Heat radiator 10, this is mounted in an expandable manner.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (8)

Patentansprüche:Patent claims: 1. Vorrichtung zum Verschweißen von thermoplastischen Kunststoffolien, bei welcher ein elektrischer, insbesondere stabförmiger Wärmestrahler in einem gekühlten, als Reflektor wirkenden Gehäuse hoher Wärmeleitfähigkeit befestigt ist, das an seiner den zu verschweißenden Folien zugewandten Seite einen sich über die Länge des Wärmestrahlers erstreckenden und die Breite der Schweißnaht bestimmenden Schlitz aufweist, und das Gehäuse an der von den zu verschweißenden Folien abgewandten Seite einen sich über die Länge des Gehäuses erstreckenden, innen mit einer Reflexionsschicht versehenen flachen Deckel aufweist, an dem mittels über die Länge des Deckels verteilter Halteelemente der Wärmestrahler gegenüber der Entfernung zu dem Schlitz verstellbar befestigt ist, nach Patent 1778401, dadurch gekennzeichnet, daß der Wärmestrahler (10) in seinem Abstand zum Längsschlitz (14) des Gehäuses (11) stufenlos verstellbar ist.1. Device for welding thermoplastic plastic films, in which an electrical, In particular, rod-shaped heat radiators in a cooled housing that acts as a reflector high thermal conductivity is attached, on its side facing the foils to be welded one extending over the length of the heat radiator and the width of the weld seam Has defining slot, and the housing on the remote from the foils to be welded Side one extending over the length of the housing, with a reflective layer on the inside has provided flat cover, on which by means of holding elements distributed over the length of the cover the radiant heater is mounted adjustable with respect to the distance to the slot, according to the patent 1778401, characterized in that the heat radiator (10) in its distance to Longitudinal slot (14) of the housing (11) is continuously adjustable. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der stabförmige Wärmestrahler (10) in gleichmäßigen Abständen von Halteelementen (24, 25) erfaßt ist, die jeweils mit einer Gewindebuchse (33) verbunden sind, welche in einer Gewindebohrung (35) des Gehäusedeckels (17) verdrehbar ist.2. Apparatus according to claim 1, characterized in that the rod-shaped heat radiator (10) in uniform intervals of holding elements (24, 25) is detected, each with a threaded bushing (33) are connected, which can be rotated in a threaded bore (35) of the housing cover (17). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Halteelemente (25) jeweils mit einem Zwischenstück (32) verbunden sind, das am Außenumfang eine Ringnut aufweist, mit welcher es im Inneren der Gewindebuchse (33) an einem von dessen Innenwand vorspringenden Ringbund (34) gehalten ist.3. Apparatus according to claim 2, characterized in that the holding elements (25) each with an intermediate piece (32) are connected, which has an annular groove on the outer circumference with which it inside the threaded bushing (33) on an annular collar (34) protruding from its inner wall is held. 4. Vorrichtung nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß jedes Halteelement (24, 25) mindestens ein Paar von sich gegenüberliegenden zangenartigen Armen (26, 27 und 28, 29) aufweist, die den oberen Bereich des Wärmestrahlers (10) umgreifen.4. Device according to claims 2 and 3, characterized in that each holding element (24, 25) at least one pair of opposing pincer-like arms (26, 27 and 28, 29) which encompass the upper region of the heat radiator (10). 5. Vorrichtung nach den Ansprüchen 3 und 4, dadurch gekennzeichnet, daß jedes Halteelement (25) mittels einer Schraube (31) mit dem Zwischenstück (32) verbunden ist und aus einem isolierenden Material besteht.5. Device according to claims 3 and 4, characterized in that each holding element (25) is connected to the intermediate piece (32) by means of a screw (31) and consists of an insulating Material consists. 6. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß zur Verdrehung der Gewindebuchse (33) deren obere, die Gehäusedeckeloberseite überragende Stirnseite zwei sich gegenüberliegende Schlitze (36, 37) zum Einführen eines Werkzeuges aufweist.6. Apparatus according to claim 2, characterized in that for rotating the threaded bushing (33) whose upper face protruding beyond the top of the housing cover has two opposing faces Has slots (36, 37) for inserting a tool. 7. Vorrichtung nach den Ansprüchen 2 und 6, dadurch gekennzeichnet, daß zur Verdrehsicherung der Gewindebuchse (33) um deren Oberteil eine Mutter (38) geschraubt ist, die gegen die Gehäusedeckeloberfläche spannbar ist.7. Device according to claims 2 and 6, characterized in that to prevent rotation the threaded bushing (33) around the upper part of which a nut (38) is screwed, which is screwed against the surface of the housing cover is tensionable. 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sowohl der Gehäuseunterteil (16) als auch der Gehäusedeckel (17) von Kühlkanälen (18,19,20,21) durchzogen ist.8. Device according to one of claims 1 to 7, characterized in that both the lower housing part (16) and the housing cover (17) are traversed by cooling channels (18,19,20,21).
DE2230090A 1972-06-21 1972-06-21 Device for welding thermoplastic plastic films Expired DE2230090C3 (en)

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IL78188A0 (en) * 1985-03-20 1986-07-31 Alethea Rosalind Melanie Hall Method and apparatus for joining sheets of a non-magnetic material together
US5277745A (en) * 1991-11-27 1994-01-11 Reynolds Metals Company Sever and seal bar having interchangeable inserts and blades
EP2941348B1 (en) * 2012-12-28 2018-05-02 Flexible Steel Lacing Company Welding apparatus for conveyor belts and method

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