DE2248678A1 - Welding plastics surfaces using resistance wire - using mobile equipment and avoiding wasteful flow of material - Google Patents
Welding plastics surfaces using resistance wire - using mobile equipment and avoiding wasteful flow of materialInfo
- Publication number
- DE2248678A1 DE2248678A1 DE19722248678 DE2248678A DE2248678A1 DE 2248678 A1 DE2248678 A1 DE 2248678A1 DE 19722248678 DE19722248678 DE 19722248678 DE 2248678 A DE2248678 A DE 2248678A DE 2248678 A1 DE2248678 A1 DE 2248678A1
- Authority
- DE
- Germany
- Prior art keywords
- resistance wire
- plastic
- welded
- welding
- parts
- 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.)
- Pending
Links
Classifications
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- 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
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
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- 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
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- 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
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
- B29C65/0672—Spin welding
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- 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
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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- 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
- B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
- B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
- B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
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- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
- B29C65/3428—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding said at least a single wire having a waveform, e.g. a sinusoidal form
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- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
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- 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
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- 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
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
- B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
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- 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
- B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
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- 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
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- 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
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
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- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
- B29C65/3432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
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- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
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- 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
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- 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
- B29L2031/737—Articles provided with holes, e.g. grids, sieves
Abstract
Description
Verfahren zum Schweißen von Konstruktionsteilen aus Kunststoff, insbesondere hochmolekularem Kunststoff Es ist bekannt, hochmolekulare Kunststoffe mitils eines sogenannten Heizspiegels bzw. Heizschwertes zu verschweißen. Method for welding structural parts made of plastic, in particular high molecular weight plastic It is known, high molecular weight plastics mitils one to weld so-called heating mirror or heating sword.
Dieses Schweißverfahren wird meist in stationären Anlagen durchgeführt, wobei zunächst die zu verschweißenden Teile in aufeinander zu und voneinander weg verschiebbare Vorrichtungen eingespannt und dann unter Zwischenlegen des Heizschwertes die zusammenzuschweißenden Flächen an das Heizschwert gedrückt werden.This welding process is mostly carried out in stationary systems, where first the parts to be welded in towards and away from one another Slidable devices clamped and then with the interposition of the heating sword the surfaces to be welded together are pressed against the heating blade.
Durch das Reizschwert wird der Kunststoff an den anliegenden Flächen bis zu einer gewissen Tiefe schmelz- oder zähflüssig.The stimulating sword removes the plastic on the adjacent surfaces Meltable or viscous to a certain depth.
Dann wird das Heizschwert zwischen den zu verschweißenden Flächen weggezogen, wobei gleichzeitig diese Flächen aneinandergedrückt, d.h. die Spannvorrichtungna#ufeinander zu bewegt werden. Durch Erkalten des Kunststoffes an der Schweißstelle sind dann die beiden Teile miteinander verbunden, wobei jedoch eine nicht geringe Menge Kunststoff beim Zusammendrücken der Teile wulstartig nach außen gedrückt wird, so daß ein Nacharbeiten der Schweißstelle durch spanabhebende Verfahren in den meisten Fällen unumganglich ist.Then the heating sword is placed between the surfaces to be welded pulled away, at the same time these surfaces pressed against each other, i.e. the clamping device close to each other to be moved. By cooling the plastic at the welding point are then the two parts joined together, but not a small amount of plastic when the parts are pressed together, it is pressed outwards like a bead, so that reworking the welding point by machining processes in most cases unavoidable is.
Ein weiterer Nachteil dieses bekannten Verfahrens ist darin zu sehen, daß durch das wulstartige Ausgießen des Kunststoffes die Maßhaltigkeit des geschweißten Gesamtgegenstandes zu wünschen übrig läßt. Ferner kann durch das Heizschwert oder den Heizspiegel eine Uberhitzung des Kunststoffs an der zu schweißenden Stelle eintreten, wobei es insbesondere dann beim Wegziehen des Heizschwertes zu einer Oxydation des Kunststoffs kommen kann, da Sauerstoff Zutritt erhält. Infolge einer solchen Oxydation leidet aber die Homogenität der Schweißstelle. Another disadvantage of this known method is to be seen in that by the bead-like pouring of the plastic the dimensional accuracy of the welded Overall object leaves something to be desired. Furthermore, by the heating sword or the heating mirror overheating of the plastic occurs at the point to be welded, in particular when the heating blade is pulled away, the Plastic can come because oxygen gets access. As a result of such oxidation but the homogeneity of the welding point suffers.
Die für das Durchführen einer Schwert- oder Spegelschweißung benötigte Vorrichtung ist aufwendig, und es können in der Regel nur gerade Flächen verschweißt werden. The one required to carry out a sword or level welding The device is complex and only straight surfaces can usually be welded will.
Der Erfindung liegt die Aufgabe zugrunde, Sin einfaches Schweißverfahren für Kunstatoffteile zu schaffen, das nicht an eine stationäre Anlage oder Vorrichtung gebunden ist und ohne Material- und Maßverluste eine oxydationsfreie homogene Verschweißung von Kunststoff-Konstruktionsteiien beliebiger Abmess und Form ermöglicht. The invention is based on the object of a simple welding process for plastic parts that are not connected to a stationary system or device is bound and an oxidation-free, homogeneous weld without loss of material or dimensions of plastic construction parts of any size and shape.
Zur Lösung dieser Aufgabe ist das erfindungsgemäße Verfahren dadurch gekennzeichnet, daß zwischen die aneinanderzuschweißenden Flächen der Konstruktionsteile ein elektrischer Widerstandsdraht entweder einfach oder in einer oder mehreren Schleifen eingelegt wird, daß dann durch den Widerstandsdraht ein Strom entsprechend seinem Widerstandswert geschickt wird, derart, daß die Stoß-oder Fugenstelle der Konstruktionsteile durch Schmelzfluß des Kunststoffs miteinander verbunden werden. Dabei kann der Widerstandsdraht in der Schweißstelle nach Beendigung des Schweißens belassen werden, so daß es möglich ist, die verschweißten Teile später wieder zu trennen, wenn der Widerstandsdraht erneut erhitzt wird. Er kann auch aus der Schweiß zone herausgezogen werden, solange der Kunststoff noch schmelzflüssig ist, was insbesondere bei solchen Kunststoffteilen von Vorteil ist, die in der chemisch en Industrie oder in der Gaivanotechnik verwendet werden und dort mit Säuren oder anderen aggressiven Flüssigkeiten in Berührung kommen, so daß metallische Einschlüsse im Kunststoff, insbesondere wenn sie aus der Oberfläche vorragen, unerwünscht sind. The method according to the invention is thereby able to achieve this object characterized in that between the surfaces of the structural parts to be welded together an electrical resistance wire either single or in one or more loops is inserted that then through the resistance wire a current corresponding to his Resistance value is sent in such a way that the butt or joint point of the structural parts are connected to one another by the melt flow of the plastic. The resistance wire be left in the weld after the welding is finished, making it possible is to separate the welded parts again later when the resistance wire is reheated. It can also be pulled out of the sweat zone as long as it is the plastic is still molten, which is particular in such Plastic parts are advantageous in the chemical industry or in Gaivano technology used and there in contact with acids or other aggressive liquids come so that metallic inclusions in the plastic, especially when they come out protrude from the surface are undesirable.
Ein späteres Trennen der verschweißten Teile ist unter diesen Umständen jedoch nicht möglich.A later separation of the welded parts is under these circumstances but not possible.
Um aber auch bei solchen Konstruktionen ein nachträgliches Trennen der Teile durch erneutes Erhitzen des Widerstandadrahtes zu ermöglichen, sieht die Erfindung vor, daß die Enden des Widerstandsdrahtes in einer konischen Ausnehmung der verschweißten Teile untergebracht werden und daß die konische Ausnehmung anschließend mit einem konischen Stopfen aus dem gleichen Kunststoff wie dem der verschweißten Teile durch an sich bekannte Reibschweißüng dicht verschlossen wird. But also with such constructions a subsequent separation to enable the parts by reheating the resistance wire sees the Invention that the ends of the resistance wire in a conical recess the welded parts are accommodated and that the conical recess then with a conical stopper made of the same plastic as that of the welded one Parts is tightly closed by friction welding known per se.
Schließlich können in die aneinanderzuschweißenden Flächen Rillen zum Einlegen des Widerstandsdrahtes eingeformt oder eingeschnitten werden. Finally, grooves can be made in the surfaces to be welded together be molded or cut to insert the resistance wire.
In der Zeichnung sind einige Anwendungsbeispiele des erfindungsgemäßen Verfahrens veranschaulicht, die sich jedoch beliebig erweitern lassen. Es zeigen Fig. 1 die Anordnung eines elektrischen Widerstandsdrahtes an bzw. in einer Endfläche einer Kunststoffplatte o. dgl. im Schnitt nach der Linie I-I in Fig. 2, Fig. 2 im Schnitt nach der Linie II-II in Fig. 1 eine gerade Stoßverschweißung, Fig. 3 das Zusammenschweißen zweier Kunststoffplatten in Form einer abgesetzten bzw. abgestuften Stoßfuge, die Fign. 4 und 5 eine weitere Anwendungsmöglichkeit des erfindungsgemäßen Verfahrens, Fig. 6 das Befestigen eines Teils aus Metall oder einem anderen Werkstoff an einem Kunststoffteil, während Fig. 7 in einer Schnittdarstellung eine weiterentwickelte Variante des erfindungsgemäßen Verfahrens wiedergibt. In the drawing are some application examples of the invention Process illustrated, which can, however, be expanded as required. Show it 1 shows the arrangement of an electrical resistance wire on or in an end face a plastic plate o. the like. In section along the line I-I in Fig. 2, Fig. 2 im Section along the line II-II in Fig. 1 shows a straight butt weld, Fig. 3 the Welding together two plastic plates in the form of a stepped or stepped one Butt joint, the FIGS. 4 and 5 another possible application of the invention Procedure, Fig. 6 the fastening of a part made of metal or a another material on a plastic part, while FIG. 7 is a sectional view shows a further developed variant of the method according to the invention.
Fig. 1 zeigt die zu verschweißende Stoßfläche 1 einer Kunst-Stofftafel oder -platte 2 mit in mehreren Schleifen eingelegtem Widerstandsdraht 3, der an Anschlußenden 4 mit einer Stromquelle (nicht dargestellt) verbunden werden kann, Der Widerstandsdraht wird mit einem seinem Widerstandswert entsprechenden Stromfluß erhitzt, so daß der Kunststoff im Bereich der Schweißzöne schmelz flü;clsig wird und die beiden Konstruktionsteile miteinander verbunden werden, wie dies aus Fig. 2 hervorgeht. Fig. 1 shows the abutment surface 1 to be welded of a plastic panel or -plate 2 with resistance wire 3 inserted in several loops, which is connected to Terminal ends 4 can be connected to a power source (not shown), The resistance wire has a current flow corresponding to its resistance value heated so that the plastic becomes molten in the area of the welding zones and the two structural parts are connected to one another, as shown in Fig. 2 emerges.
Der Widerstandsdraht 3 kann in der geschweißten Zone verbleiben. Die Verschweißung erfolgt praktisch unter ~luftabschluß, so daß keine Oxydation des Kunststoffs eintritt, welche sonst die Homogenität der Schweißnaht beeinträchtigt. Eine solche Oxydation kann bei dem bekannten Spiegel- oder Schwertschweißen, wie bereits erwähnt, nicht ganz vermieden werden. The resistance wire 3 can remain in the welded zone. The welding takes place practically in the absence of air, so that no oxidation of the plastic occurs, which otherwise affects the homogeneity of the weld seam. Such an oxidation can in the known mirror or sword welding, such as already mentioned, cannot be avoided entirely.
Wird der Widerstandsdraht im geschweißten Kunststoff belassen, so können durch späteres Wiedererhitzen desselben die zusammengeschweißten Teile wieder auseinandergenommen werden. If the resistance wire is left in the welded plastic, so the welded-together parts can be re-welded by later reheating be taken apart.
Dies kann sogar mehrmals ohne weantlichen Materialverlust geschehen.This can even be done several times without significant material loss.
Das in den Fign. 1 und 2 veranschaulichte Anwendungsbeiapel bezieht sich beispielsweise auf das Zusammensetzen einer Kegelbahn aus hochmolekularem Kunststoff. Da das erfindungagemäßd Verfahren von einer stationären Vorrichtung unabhängig ist, können die einzelnen Teile einer Kunststoff-Kegelbahn an Ort und Stelle zusammengesetzt werden, zumal die komplette Kegelbahn ohnehin nicht in den dafür vorgesehenen Raum transportiert werden könnte. Das neue Verfahren kann aber auch in vielen anderen Fällen zum Ver##cliwoißen großer und kleiner Ellnststhffteile beliebiger Form za1r Anwendung kommen, da die aneinanderzuschweißenden Flächen (wie die Fläche 1 in den Fign 1 und 2) nicht unbedingt gerade sein müssen. That in FIGS. 1 and 2 refer to the application examples illustrated For example, on assembling a bowling alley made of high-molecular plastic. Since the method according to the invention is independent of a stationary device, the individual parts of a plastic bowling alley can be put together on the spot especially since the entire bowling alley is not in the space provided for it anyway could be transported. The new process can also be used in many others Cases for clipping large and small plastic parts of any shape Application come because the to be welded together Surfaces (like the surface 1 in FIGS. 1 and 2) do not necessarily have to be straight.
Figq 3 zeigt das Verschweißen einer abgestuften Fuge 5 zweier Kunststoffplatten 6. Der Widerstandsdraht ist auch hier (wie in allen Figuren) mit 3 bezeichnet. Bei der Änwendungsform nach Fig. 3 tritt keine Auswölbung der Schleißnaht auf.Die Verbindungsart nach Fig. 3 kann beispielsweise beim Zusammensetzen einer künstlichen Schlittschuhbahn angewandt werden, wie sie z.Zt. in Versuchen erprobt wird. Auch hier kann der Widerstandsdraht 3 im Kunststoff verbleiben, um die Schweißnähte wieder auseinandernehmen zu können. Anderenfalls kann der Widerstandsdraht 3 auch herausgezogen werden, solange der Kunststoff in der Schweißzone noch schmelzflüssig ist. Figq 3 shows the welding of a stepped joint 5 of two plastic plates 6. Here too (as in all figures) the resistance wire is designated by 3. at 3 there is no bulging of the wear seam. The type of connection according to Fig. 3, for example, when assembling an artificial skating rink are used as they are currently is tested in trials. Again, the resistance wire can 3 remain in the plastic so that the welds can be taken apart again. Otherwise, the resistance wire 3 can also be pulled out as long as the Plastic is still molten in the welding zone.
Den Widerstandsdraht 3 wird man stets dann herausziehen, wenn Netalleinschlüsse im Kunststoff aus elektrischen oder chemischen Gründen unerwünscht sind. Dies ist z.B. auch bei dem Anw#dungsbeispiel nach den Fign. 4 und 5 der Fall. Fig. 4 zeigt einen Behälter 7 aus Metall, der-mit einer Kunststoffauskleidung 8 versehen ist, die durch Schrauben oder Nieten 9 am Metallbehält er 7 befestigt werden kann. Wird der Behälter 7 beispielsweise in der Galvanotechnik verwendet, so wären die Schrauben oder Nieten 9 unerwünscht, da sie mit der .~ galvanischen Flüssig keit in Berührung kommen würden. Durch das neue Schweißverfahren ist es möglich, gappen 10 über den Köpfen der Schrauben oder Nieten 9 mit der Kunststoffauskleidung 8 mit Hilfe eines Widerstandsdrahtes 3 (Fig. 5) zu verschweißen. In diesem Fall wird man stets den Widerstandsdraht 3 herausziehen, Er braucht dabei keine besondere Führung, da er sich beim Herausziehen zwangsläufig nur durch die schmelzflüssige Schweißzone schlängelt. The resistance wire 3 will always be pulled out when there are netall inclusions are undesirable in plastic for electrical or chemical reasons. This is e.g. also in the application example according to FIGS. 4 and 5 the case. Fig. 4 shows a container 7 made of metal, which is provided with a plastic lining 8, which he 7 can be attached to the metal container by screws or rivets 9. Will If the container 7 is used, for example, in electroplating, then the screws would be or rivets 9 undesirable because they are in contact with the galvanic liquid would come. The new welding process makes it possible to gap 10 over the Heading the screws or rivets 9 with the plastic lining 8 with the help of a Resistance wire 3 (Fig. 5) to be welded. In this case you will always be the Pull out the resistance wire 3, it does not need any special guidance as it only winds its way through the molten welding zone when it is pulled out.
Mit Hilfe des neuen Schweißverfahrens können auch Teile aus Metall oder einem anderen beliebigen Werkstoff an Kunststoffteilen befestigt werden, was beispielsweise in Fig, 6 veranschaulicht ist. An einen Kunstatoffteil 11 ist ein Bauteil 12 aus Metall, Holz oder einem anderen Werkstoff, der nicht ohne weiteres mit dem Kunststoffteil 11 verschweißhr ist, durch eine versc Seißbare Platte 13 befestigt0 Je nach kaenduagsfall kann der Widerstandsdraht drinbleiben oder herausgezogen werden. With the help of the new welding process, parts made of metal can also be produced or any other material to be attached to plastic parts, what is illustrated in FIG. 6, for example. At a Kunstatoffteil 11 is a Component 12 made of metal, wood or another material that is not readily is welded to the plastic part 11 by means of a sissable plate 13 attached0 depending on the case the resistance wire stay in there or pulled out.
Es besteht jedoch auch die Möglichkeit, den Widerstandsdraht 3 in der Schweißnaht zu belassen, ohne daß dessen Enden 14 nach dem Verschweißen aus der Dberfläche herausragen, wie in Fig. However, there is also the option of using the resistance wire 3 in to leave the weld seam without its ends 14 coming off after welding protrude from the surface, as shown in Fig.
7 dargestellt. Im Bereich der Schweißnaht wird an den Austrittsstellen des Widerstandsdrahtes je eine konische Ausnehmung 15 vorgesehen, die nach dem Verschweißen der Kunststoffteile durch Reibschweißung mit einem konischen Stopfen 16 (aus dem gleichen Kunststoff) verschlossen wird, nachdem vorher das Ende 14 des Widerstandsdrahtes 3 umgebogen worden ist. her konische Stopfen 16 weist einen Schaft 17 auf, der zum Reibverachweißen in das Spannfutter einer Handbohrmaschine eingespannt werden kann und nachher abgeschnitten wird.7 shown. In the area of the weld seam is at the exit points of the resistance wire each have a conical recess 15 which, after welding the plastic parts by friction welding with a conical plug 16 (from the same plastic) is closed after the end 14 of the resistance wire 3 has been bent. her conical stopper 16 has a shaft 17 which is used for Friction welding can be clamped in the chuck of a hand drill and is cut off afterwards.
In der Zeichnung sind nur einige tiwendungsbeispiele gezeigt; diese lassen sich jedoch beliebig erweitern. So können auch komplizierte gonstriiktlonen aus Kunststoff durch das erfindungsgemäße Schweißwrfahren aus Einzelteilen zusamiengesetzt werden, da sich beim Schweißen die Abmessungen der Einzelteile nicht verändern. Dies ist besonders dann von Vorteil, wenn es sich um Konstruktionen handelt, die keine flassenartikel darstellen, so daß die Anfertigung einer kostspielilgnn Gesamtpreß- oder -spritzform unwivtschaftlich wäre. Auch können beispielsweise Rohre aus entsprechendem Kunststoff mit oder ohne Muffe durch das erfindungsgemäße Verfahren miteinander verschweißt werden. Only a few examples of use are shown in the drawing; these however, they can be expanded as required. Complicated gonstrictions can also be used in this way Made of plastic by the welding process according to the invention from individual parts because the dimensions of the individual parts do not change during welding. This is particularly advantageous when it comes to constructions that do not represent bottle articles, so that the production of a costly complete press or injection mold would be unrelated. For example, pipes from the corresponding Plastic with or without a sleeve by the method according to the invention with one another be welded.
Die Erfindung betrifft auch Abänderungen der im beiliegenden Patentanspruch 1 umrissenen iusführungsform und bezieht sich vor allem auch auf sämtliche Erfindungsmerkmale, die im einzelnen -- oder in Kombination -- in der gesamten Beschreibung und Zeichnung offenbart sind. The invention also relates to modifications to the appended claim 1 and relates above all to all features of the invention, those individually - or in combination - throughout the description and drawing are disclosed.
Patentansprüche Claims
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19722248678 DE2248678A1 (en) | 1972-10-04 | 1972-10-04 | Welding plastics surfaces using resistance wire - using mobile equipment and avoiding wasteful flow of material |
Applications Claiming Priority (1)
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DE19722248678 DE2248678A1 (en) | 1972-10-04 | 1972-10-04 | Welding plastics surfaces using resistance wire - using mobile equipment and avoiding wasteful flow of material |
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DE2248678A1 true DE2248678A1 (en) | 1974-04-11 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0050985A1 (en) * | 1980-10-24 | 1982-05-05 | M.T. Loughborough | Method of splicing strips of thermoplastic material and apparatus therefor |
WO1992008600A1 (en) * | 1990-10-12 | 1992-05-29 | Gates Formed-Fibre Products, Inc. | Attachment mechanism for nonwoven thermoformed articles |
GR1001463B (en) * | 1992-05-27 | 1994-01-31 | Christoforos Mayromatidis | Recycled laced belt plastic scraper originating from a process involving the autogenous welding of the elastomeric polyurethane plastic scraping residues. |
WO1998029002A1 (en) * | 1997-01-04 | 1998-07-09 | Scapa Group Plc | Flexible attachment means |
EP1099533A1 (en) * | 1999-11-10 | 2001-05-16 | Tohoku Munekata Co., Ltd. | An apparatus for heat bonding plastic strips and clips |
-
1972
- 1972-10-04 DE DE19722248678 patent/DE2248678A1/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0050985A1 (en) * | 1980-10-24 | 1982-05-05 | M.T. Loughborough | Method of splicing strips of thermoplastic material and apparatus therefor |
US4539064A (en) * | 1980-10-24 | 1985-09-03 | Roman Andruchiw | Apparatus for splicing strips of thermoplastic material |
WO1992008600A1 (en) * | 1990-10-12 | 1992-05-29 | Gates Formed-Fibre Products, Inc. | Attachment mechanism for nonwoven thermoformed articles |
GR1001463B (en) * | 1992-05-27 | 1994-01-31 | Christoforos Mayromatidis | Recycled laced belt plastic scraper originating from a process involving the autogenous welding of the elastomeric polyurethane plastic scraping residues. |
WO1998029002A1 (en) * | 1997-01-04 | 1998-07-09 | Scapa Group Plc | Flexible attachment means |
EP1099533A1 (en) * | 1999-11-10 | 2001-05-16 | Tohoku Munekata Co., Ltd. | An apparatus for heat bonding plastic strips and clips |
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