DE2739985A1 - Lap welding web ends with hot air nozzle - by delimiting weld width with protective tapes and causing fusion between overlaps - Google Patents

Lap welding web ends with hot air nozzle - by delimiting weld width with protective tapes and causing fusion between overlaps

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Publication number
DE2739985A1
DE2739985A1 DE19772739985 DE2739985A DE2739985A1 DE 2739985 A1 DE2739985 A1 DE 2739985A1 DE 19772739985 DE19772739985 DE 19772739985 DE 2739985 A DE2739985 A DE 2739985A DE 2739985 A1 DE2739985 A1 DE 2739985A1
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DE
Germany
Prior art keywords
hot air
welding
weld
overlaps
air nozzle
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Withdrawn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
DE19772739985
Other languages
German (de)
Inventor
Josef Jenner
Theo Schreus
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.)
VERSEIDAG
Verseidag Industrietextilien GmbH
Original Assignee
VERSEIDAG
Verseidag Industrietextilien GmbH
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Publication date
Application filed by VERSEIDAG, Verseidag Industrietextilien GmbH filed Critical VERSEIDAG
Priority to DE19772739985 priority Critical patent/DE2739985A1/en
Publication of DE2739985A1 publication Critical patent/DE2739985A1/en
Withdrawn legal-status Critical Current

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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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7832—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the overlap between the parts to be joined, e.g. the overlap between sheets, plates or web-like materials
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one 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
    • B29C66/003—Protecting areas of the parts to be joined from overheating
    • 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
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43129—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles, i.e. oblique
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/865—Independently movable welding apparatus, e.g. on wheels
    • B29C66/8652—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling
    • B29C66/86521—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being self-propelling
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/865—Independently movable welding apparatus, e.g. on wheels
    • B29C66/8652—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling
    • B29C66/86531—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being guided
    • B29C66/86533—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being guided by rails
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • 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
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7092—Conveyor belts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Weld join esp. a lap joint is made with the aid of hot air to join thermoplastics webs together, avoiding use of welding adjuvants. Both web ends are positioned in a holding installation (which can be extended by fitting sections together) and cut with shears moving in a guide groove insuch a way that both ends overlap by the breadth of the welding seam to be produced. The breadth of the weld seam is limited by heat-resistant protective strips. A nozzle which is supplied with hot air by welding machine forms a melt flow between the overlapping ends of the web that is sufficient to efect weld-bonding.

Description

Verfahren zur Herstellung einer Method of making a

Schweißnaht mittels Heißluft Das Verschweißen von thermoplastischen Kunststoffen bietet keine besonderen Schwierigkeiten, wenn es sich um verhältnismäßig voluminöse kompakte Kunststoffteile handelt, die genügend Masse für die Erzeugung des für die Verschweißung mit oder ohne Verwendung von Schweißhilfsmitteln notwendingen Schmelzflusses haben. Bei dünnen Flächengebilden wie z.i3. Geweben ist eine derartige Dlaterialreserve nicht vorhanden, so daß sich bei allen bekannten Schweißvt#rfahren Probleme ergeben. Welding seam using hot air The welding of thermoplastic Plastics presents no particular difficulty when it comes to proportion voluminous compact plastic parts that have enough mass for the production for welding with or without the use of welding aids Have melt flow. In the case of thin flat structures such as i3. Weaving is one of those There is no material reserve, so that all known welding methods run away Problems arise.

Eine bekannte Methode ist z.B. das Aufschweißen von Bändern, die über die zu verbindenden glatt gegeneinander gestossenen Bandränder geschweißt werden und einen wesentlichen Teil der Schweißschmelze liefern.A well-known method is, for example, the welding of tapes that extend over the smoothly butted tape edges to be connected are welded and provide a substantial portion of the molten weld.

Besonders problematisch wird die Herstellung von Schweißnähten bei einlagigen, verhältnismäßig dünnen Flächengebilden wie Geweben, wenn sich die Bandenden überlappen und ohne Verwendung von Schweißhilfsmitteln durch Heißluft verschweißt werden sollen.The production of weld seams is particularly problematic single-ply, relatively thin sheet-like structures such as woven fabrics, if the ends of the tape are to be found overlap and welded by hot air without the use of welding aids should be.

Diese Art der Verschweißung hat sich für viele Einsätze als besonders günstig erwiesen, weil sie eine haltbare und geschmeidige Nahtverbindung ergibt. Da es sich hierbei um verhältnismäßig dünne Flächengebilde handelt, sind die Anforderungen an die Durchführung derartiger Schweißverbindungen besonders groß.This type of welding has proven to be special for many uses Proven to be beneficial because it results in a durable and pliable seam connection. Since these are relatively thin sheet-like structures, the requirements are particularly large for the implementation of such welded joints.

Schwierigkeiten ergeben sich auch aus der Tatsache, daß z.B.Difficulties also arise from the fact that e.g.

das Endlosmachen durch Verschweißen z.B. von Transportbändern vor Ort, also an der Einsatzmaschine selbst erfolgen muß.making endless by welding e.g. conveyor belts Place, so must be done on the deployment machine itself.

Dieses verlangt eine bewegliche, jeden Einsatzverhältnissen anpaßbare Schweißmethode, also Bedingungen, die von stationären Anlagen nicht erfüllt werden können.This requires a mobile one that can be adapted to any application Welding method, i.e. conditions that are not met by stationary systems can.

Es hat sich auch gezeigt, daß beim Verschweißen mittels Heißluft die aus der Düse ausströmende Heißluft nicht so genau zu lokalisieren ist, daß beim Verschweißen Ende über Ende gelappt" eine Auswirkung auf die angrenzenden Zonen nicht eintritt.It has also been shown that when welding by means of hot air, the Hot air flowing out of the nozzle cannot be localized so precisely that the Welding end over end lobed "an effect on the adjacent zones does not occur.

Diese angrenzenden Zonen werden mehr oder weniger von dem Iieißluftstrom angeschmolzen und verlieren besonders bei dünnen Flächengebilden in unerwünschter Weise an Festigkeit.These adjacent zones are more or less affected by the hot air flow melted and lose, especially in the case of thin flat structures, in an undesirable manner Way of firmness.

Aufgabe der Erfindung ist es, ein Verfahren vorzuschlagen, das die Herstellung einer Schweißnaht bei einlagigen Geweben ohne Anwendung von Schweißhilfsmitteln mittels heißluft Ende über Ende gelappt" auch am Einsatzort möglich macht.The object of the invention is to propose a method that the Production of a weld seam in single-layer fabrics without the use of welding aids using hot air end over end lobed "also makes it possible at the place of use.

Erfindungsgemäß wird dieses durch folgendes Schweißverfahren erreicht: Die beiden Enden des auf Maß gebrachten Bandes werden in einer Ilaltevorrichtung - in den Abb. 1 + 2 als Nadel leisten dargestellt -so festgelegt, daß die Bandenden sich etwas weiter überlappen als die nachträgliche Schweißnaht breit sein soll.According to the invention, this is achieved by the following welding process: The two ends of the cut tape are placed in a holding device - Shown in Figs. 1 + 2 as a needle bar-so set that the tape ends overlap a little further than the subsequent weld seam should be wide.

Diese Nadelbretter sind so aufgeteilt, daß sie am Einsatzort in beliebiger Länge nebeneinandergelegt werden können.These needle boards are divided so that they can be used in any Length can be placed side by side.

Es hat sich ergeben, daß eine Länge der Nadelbretter von 300 mm eine ausreichende Variationsmöglichkeit bietet. Abb. 1 zeigt dieses Nadelbrett (2). Es enthält links und rechts je eine Nadel leiste (3a + b) und in der Mitte eine Nute (4) zur Aufnahme einer (elektrischen) Schere.It has been found that a length of the needle boards of 300 mm offers sufficient possibilities for variation. Fig. 1 shows this needle board (2). It contains a needle bar on the left and right (3a + b) and a groove in the middle (4) for holding (electric) scissors.

In Abb. 1 ist ferner dargestellt, wie die beiden Bandenden (la und lb) auf dieser Ilaltevorrichtung einzunadeln sind.In Fig. 1 it is also shown how the two ends of the tape (la and lb) are to be needled on this Ilaltevorrichtung.

Zunächst wird das Bandende (la) eingenadelt, anschließend mittels einer (elektrischen) Schere, die in die Nute (4) geführt werden kann, auf die gewünschte Breite geschnitten.First, the end of the tape (la) is needled, then by means of (electric) scissors, which can be guided into the groove (4), to the desired Width cut.

Der entstehende Abfallstreifen (6a) wird weggenommen und das Bandende dann zurückgeklappt.The resulting waste strip (6a) is removed and the end of the tape then folded back.

Anschließend wird das Bandende lb eingenadelt. Die (elektrische) Schere schneidet nun den Abfallstreifen (6b) ab, so daß die beiden Banenden (la + b) sich in der gewünschten Breite, im allgemeinen 2 cm, überlappen. Nunmehr wird die Schneidnute (4) durch eine eingeschobene Ausgleichsschiene (7) abgedeckt (Abb. 2).Then the end of the tape lb is needled. The (electric) scissors now cut off the waste strip (6b) so that the two ban ends (la + b) meet overlap in the desired width, generally 2 cm. The cutting groove is now (4) covered by an inserted compensation rail (7) (Fig. 2).

Um die Hitzeeinwirkung bei dem anschließenden Schweißvorgang auf die zu verschweißende Bandzone zu beschränken, werden Schutzstreifen auf (5a) bzw. unter (5b) die Bandenden geklebt, (Abb. 1 und 2). Unter dem Bandende (la) sollte der Schutzstreifen etwa 40 mm und auf dem Bandende alb) etwa 10 mm betragen.In order to avoid the effects of heat during the subsequent welding process on the To restrict the band zone to be welded, protective strips are placed on (5a) or below (5b) the tape ends glued, (Fig. 1 and 2). The protective strip should be under the end of the tape (la) about 40 mm and on the end of the tape alb) about 10 mm.

Für den Schweißvorgang selbst wird eine fahrbare Heißluft schweißmaschine verwendet, deren Düse so geformt ist, daß sie zwischen beiden Bandenden eingefahren werden kann.A mobile hot air welding machine is used for the welding process itself used, the nozzle is shaped so that it is retracted between the two ends of the tape can be.

Die Schweißmaschine (12 Abb. 4) besteht im wesentlichen aus einem elektrischen Heizaggregat, einem Gebläse, einem regelbaren Elektromotor für die Fortbewegung und einer Düse für die gezielte Führung der Heißluft zur Schweißstelle. Dieses sind Einrichtungen, die in mehr oder weniger abgewandelter Form an jeder fahrbaren Schweißeinrichtung zu finden sind und daher keinen Gegenstand dieser Erfindung bilden. Wesentlich für den erfindungsgemäßen Ablauf des Verfahrens ist aber die im folgenden beschriebene Führungsvorrichtung (8 + 9).The welding machine (12 Fig. 4) consists essentially of one electric heating unit, a blower, a controllable electric motor for the Movement and a nozzle for the targeted guidance of the hot air to the welding point. These are bodies that are in more or less modified form at everyone mobile welding device can be found and therefore not the subject of this invention form. However, what is essential for the process according to the invention is that in the following described guide device (8 + 9).

Um den glatten Lauf und eine einwandfreie Führung der Schweißmaschine zu erzielen, werden auf das Bandende (la) Laufbleche (8) gelegt, deren Länge den Nadelbrettern entspricht. Am äußeren Rande dieser Laufbleche befindet sich eine für die zwangsläufige Führung der Schweißmaschine wirksame Leitschiene (9), so daß auch geschweifte oder schräg verlaufende Schweißnähte einwandfrei wiederholbar auszuführen sind. Beides - Laufblech und Leitschiene (9) - verbürgen die störungsfreie Bewegung der Schweißmaschine.About the smooth running and perfect operation of the welding machine to achieve, are placed on the end of the tape (la) running plates (8), the length of which is the Corresponds to needle boards. There is one on the outer edge of these treads for the inevitable guidance of the welding machine effective guide rail (9), so that Even curved or oblique weld seams can be carried out in a perfectly repeatable manner are. Both - running plate and guardrail (9) - guarantee trouble-free movement the welding machine.

Die konstante Laufgeschwindigkeit ist für den gleichmäßigen Ablauf des Schweißvorganges von besonderer Wichtigkeit, da die Hitzeeinwirkung durch die Laufgeschwindigkeit der Maschine bestimmt wird. Die richtige Schweißgeschwindigkeit muß durch Probefahren ermittelt werden, um sie den jeweiligen Arbeitsbedingungen (Schmelzpunkt des verwendeten synthetischen Faserstoffes und Substanz des Gewebes) anzupassen.The constant running speed is for an even process of the welding process is of particular importance, since the heat exposure through the Running speed of the machine is determined. The right welding speed must be determined by test drives in order to match them to the particular working conditions (Melting point of the synthetic fiber used and the substance of the fabric) adapt.

Um eine von Anfang bis zu Ende gleichmäßige Schweißnaht (11) zu erhalten, hat es sich als zweckmäßig erwiesen, das Einlaufen und Auslaufen der Schweißmaschine durch eine im Bereiche der Schweißnaht liegende und später zu entfernende Seitenverlängerung (10a + b) zu erleichtern (Abb. 3). Auf dieser Seitenverländerung kann die Maschine anlaufen und die Heißluft düse kann vor dem eigentlichen Bandrand in die zu schweißende Naht eingeführt werden.In order to obtain a uniform weld seam (11) from start to finish, it has proven to be expedient to run in and run out of the welding machine by a side extension located in the area of the weld seam and later to be removed (10a + b) to facilitate (Fig. 3). On this side change, the machine can start up and the hot air nozzle can enter the strip to be welded in front of the actual strip edge Suture to be introduced.

Auch das Auslaufen der Maschine aus der eigentlichen Naht kann durch diese Seitenverlängerung störungsfrei erfolgen.The machine can also leak from the actual seam this side extension can take place without interference.

Auf den Abbildungen 1 - 4 bedeuten die aufgeführten Ziffern folgendes: 1 a und b = die Bandenden des auf Maß geschnittenen Bandes 2 = das Nadelbrett 3 a und b 5 die Nadel leisten 4 = die Schneidenute 5 a und b = die Schutzstreifen 6 a und b = die Abfallstreifen 7 = die Ausgleichsschiene 8 = das Laufbrett für die Schweißmaschine 9 = die Leitschiene für die Schweißmaschine 10a und b - die provisorischen Seitenverlängerungen 11 = die SchweißnahtIn Figures 1 - 4, the numbers listed mean the following: 1 a and b = the ends of the tape cut to size 2 = the needle board 3 a and b 5 make the needle 4 = the cutting groove 5 a and b = the protective strips 6 a and b = the waste strips 7 = the leveling rail 8 = the running board for the Welding machine 9 = the guardrail for the welding machine 10a and b - the temporary ones Side extensions 11 = the weld

Claims (1)

Schutzanspruch Verfahren für die herstellung einer mittels Heißluft geschweißten Verbindung von thermoplastischen Flächenbahnen insbesondere Geweben Ende über Ende überlappt" ohne Anwendung von Schweißhilfsmitteln, dadurch gekennzeichnet, daß die beiden Enden der Flächenbahn in einer durch Zusammensetzen von Teilstücken beliebig zu verlängernden llaltevorrichtung festgelegt und mittels einer in einer Führungsnut geführten Schere so zugeschnitten werden, daß sich die beiden Enden der Flächenbahn in der Breite der herzustellenden Schweißnaht überlappen, daß diese Schweißnaht durch hitzebeständige Schutzstreifen in der gewünschten Breite begrenzt wird und daß eine Düse, die von einer auf Laufblechen laufenden und durch eine Leitschiene gesteuerten Schweißmaschine mit heißluft gespeist wird, zwischen den sich überlappenden Enden der Gewebebahn einen für die Verschweißung ausreichenden Schmelzfluß erzeugt.Protection claim process for the production of a hot air welded connection of thermoplastic flat webs, in particular fabrics End over end overlaps "without the use of welding aids, characterized in that that the two ends of the sheet in one by joining pieces together arbitrarily extended llaltevorrichtung set and by means of one in one Guide groove guided scissors are cut so that the two ends of the surface web in the width of the weld to be produced overlap that this Weld seam limited by heat-resistant protective strips in the desired width and that a nozzle, which is running on running plates and by a guide rail controlled welding machine is fed with hot air, between the overlapping Ends of the fabric web creates a melt flow sufficient for the welding.
DE19772739985 1977-09-06 1977-09-06 Lap welding web ends with hot air nozzle - by delimiting weld width with protective tapes and causing fusion between overlaps Withdrawn DE2739985A1 (en)

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Application Number Priority Date Filing Date Title
DE19772739985 DE2739985A1 (en) 1977-09-06 1977-09-06 Lap welding web ends with hot air nozzle - by delimiting weld width with protective tapes and causing fusion between overlaps

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Application Number Priority Date Filing Date Title
DE19772739985 DE2739985A1 (en) 1977-09-06 1977-09-06 Lap welding web ends with hot air nozzle - by delimiting weld width with protective tapes and causing fusion between overlaps

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DE2739985A1 true DE2739985A1 (en) 1979-03-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844062A1 (en) * 1996-11-21 1998-05-27 The Procter & Gamble Company Thermal joining of webs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844062A1 (en) * 1996-11-21 1998-05-27 The Procter & Gamble Company Thermal joining of webs

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