DE2726137A1 - Vibrator for supersonic welding of plastics components - has sonotrode with fluted or ribbed welding surface - Google Patents

Vibrator for supersonic welding of plastics components - has sonotrode with fluted or ribbed welding surface

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Publication number
DE2726137A1
DE2726137A1 DE19772726137 DE2726137A DE2726137A1 DE 2726137 A1 DE2726137 A1 DE 2726137A1 DE 19772726137 DE19772726137 DE 19772726137 DE 2726137 A DE2726137 A DE 2726137A DE 2726137 A1 DE2726137 A1 DE 2726137A1
Authority
DE
Germany
Prior art keywords
sonotrode
welding
oscillator according
electromechanical
electromechanical oscillator
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Withdrawn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
DE19772726137
Other languages
German (de)
Inventor
Kurt Luedtke
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.)
OTTO SIEBECK GmbH
Original Assignee
OTTO SIEBECK GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OTTO SIEBECK GmbH filed Critical OTTO SIEBECK GmbH
Priority to DE19772726137 priority Critical patent/DE2726137A1/en
Publication of DE2726137A1 publication Critical patent/DE2726137A1/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Withdrawn legal-status Critical Current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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/01—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
    • 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
    • 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
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral 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
    • B29C66/40—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
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • B29C66/81—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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Electro-mechanical vibrator has the frontal face of the sonotrode nearest the surface(s) to be welded fitted with >=1 concavities so that there are ridges protruding above the plane of the sonotrode. These ridges are pref. of different heights and are pref. grooved or corrugated.

Description

El ektromechanischer Schwin#ürU1traschalI-Schwi#n#enElectromechanical swings for ultrasound swims

Die Erfindung bezieht sich auf ein Verfahren zum Betrieb eines mit einer elektrischen Wechselspannung in Resonanz zu erregenden ,elektromechanischen Schwinger.The invention relates to a method for operating a with an electrical alternating voltage to be excited in resonance, electromechanical Schwinger.

Es ist bekannt, mit solchen Schwingern Kunststoffteile miteinander zu verschweißen. Die zu verschweiBenden Kontaktflächen werden hierbei möglichst mit Energierichtungsgebern, das sind hervorstehende Materialkanten (s.Fig*1), versehen. Diese Energierichtungsgeber gewährleisten ein gleichmäßiges Verfließen des Kunststoffes unter Bildung einer guten Verbindung.It is known to use such transducers to connect plastic parts to weld. The contact surfaces to be welded are as close as possible with energy directors, i.e. protruding material edges (see Fig. * 1). These energy directors ensure that the plastic flows evenly forming a good connection.

Zum Uberlappungsschweißen von dünnen Kunststoffbändern, vornehmlich Kunststoffbänder zur Umreifung von Verpackungen, ist aber eine Anwendung dieser Energierichtungsgeber nicht möglich, da die Kunststoffbänder nur geringe Dicken aufweisen.For overlap welding of thin plastic strips, primarily Plastic straps for strapping packaging, however, is one application of this Energy director not possible because the plastic strips are only thin exhibit.

Demzufolge geht die Ultraschall-Energie übergangslos in die Schweißzone ein und macht deren Ränder brüchig. Haltbare Verschweißungen waren deshalb bisher auf diesem Gebiet schlecht möglich. Auch mehr oder weniger willkürlich profilierte Werkzeuge brachten keine wesentlichen Verbesserungen.As a result, the ultrasonic energy goes seamlessly into the welding zone and makes their edges brittle. Durable welds were therefore up to now poorly possible in this area. Also profiled more or less arbitrarily Tools did not bring any significant improvements.

Gegenstand vorliegender Erfindung ist ein Verfahren zum Ultraschall schweißen von dünnen Kunststoffbändern, das ein ähnliches Verhalten wie die o.a. Energierichtungsgeber zeigt. Dadurch ist es möglich, haltbare Ultraschall-Schweißverbindungen bei dünnen Kunststoffbändern herzustellen. Anhand der in Fig.2 dargestellten Schnittzeichnung durch eine Uberlappung von zwei Kunststoffbändern, ist zu ersehen, daß bei X) durch die hervorstehenden Kanten der Schweißwerkzeug-Stirnfläche die eingebrachte Energie absorbiert und durch die dabei hervorgerufene Molekularreibung nur an diesen Stellen der Kunststoff plastisch gemacht wird.The present invention relates to a method for ultrasound welding of thin plastic strips, which behaves similarly to the above Energy director shows. This makes it possible to create durable ultrasonic welded joints with thin plastic tapes. On the basis of the sectional drawing shown in Figure 2 by overlapping two plastic strips, it can be seen that at X) through the protruding edges of the welding tool face reflect the energy introduced absorbed and by the resulting molecular friction only at these points the plastic is made plastic.

Der plastische Kunststoff kann frei beweglich in Uberlappungslängen das Ober- und Unterband gut verschmelzen durch die Bildung einer guten Schweißraupe.Es entsteht im Schweißbereich ein zugkraftmäßig günstiger, schlauchartiger Querschnitt mit hauptsächlich zwei Längsnähten, mit guter Schweißraupenbildungb wie in Fig. 3 dargestellt. Vorteilhafterweise werden durch leicht gekrümmte Ausläufe Y) wie in Fig. 4 gezeigt, die entstandenen Längsschweißnähte in das Kunststoffband-Material ausserhalb der Schweißzone in angemessenen Ubergängen geleitet. Weiterhin ist es zur Erhöhung der Zugfestigkeit noch vorteilhaft, wenn der bei der Verschweißung entstehende Klappereffekt zur Erzeugung von weiteren Nähten herangezogen wird. Dies geschieht wie in Fig. 5 gezeigt, durch Kanten Z) geringerer Höhe und damit geringerem Schweißdruck, die leichtere Oberflächenvernetzungen linienartig von Ober- und Unterkunststoffband bewirken.The plastic plastic can move freely in overlapping lengths the upper and lower bands merge well by forming a good weld bead A hose-like cross-section that is favorable in terms of tensile force is created in the welding area with mainly two longitudinal seams, with good weld bead formationb as in Fig. 3 shown. Advantageously, slightly curved outlets Y) such as shown in Fig. 4, the resulting longitudinal welds in the plastic tape material outside the welding zone in appropriate transitions. Furthermore it is to increase the tensile strength still advantageous when the welding resulting rattle effect is used to create further seams. this happens as shown in Fig. 5, by edges Z) of lower height and thus lower Welding pressure, the lighter surface crosslinking of the upper and lower plastic tape like a line cause.

Da einzelne Kunststoffbänder einen übergangslosen, schnellen Erweichungspunkt haben, ist es sehr zweckmäßig das Unterwerkzeug an den Seiten mit hochstehenden Kragen zu versehen, wie in Fig. 6 bei W) dargestellt.Das erweichte Kunststoffbandmaterial kann dann nicht die Schweißzone verlassen.Because individual plastic tapes have a seamless, rapid softening point it is very useful to have the lower tool on the sides with upright To provide collar, as shown in Fig. 6 at W). The softened plastic band material can then not leave the welding zone.

Da die zu verschweißenden Kunststoffbänder auf Scherung beansprucht werden, ist es vorteilhaft die Schweißnähte und damit die Uberlappungslängen der Kunststoffbänder und damit wiederum die Schweißnahtlängen so zu verlängern, daß eine geforderte Scherfestigkeit bei festgelegter,spezifischer Belastung, erreicht wird.Because the plastic strips to be welded are subject to shear stress are, it is advantageous to the welds and thus the overlap lengths of the Plastic straps and thus in turn to lengthen the weld seam lengths so that a required shear strength at a specified, specific load is achieved will.

Da aber für die obengenannten Bedingungen baulich durch die Ultraschall-Generatorfrequenz, Ultraschall-Generatorleistung und praktische Ausführung des elektromechanischen Schwingers Grenzen gesetzt sind, ist es weiterhin vorteilhaft, den elektromechanischen Schwinger eine oder mehrere, gleichgerichtete, oder zueinander verschieden gerichtete Bewegungen über die Fläche der zu verschweißenden Kunststoffbänder ausführen zu lassen. Dadurch wird erreicht, daß die Schweißnähte durch Verlängerung ihrer Längen den Erfordernissen angepaßt werden kann.However, since the ultrasonic generator frequency is structurally responsible for the above-mentioned conditions, Ultrasonic generator power and practical execution of the electromechanical Schwingers limits are set, it is still advantageous to use the electromechanical Oscillator one or more, in the same direction, or in different directions from one another Perform movements over the surface of the plastic strips to be welded permit. This ensures that the weld seams by lengthening their lengths can be adapted to requirements.

Claims (8)

Patentansprüche : @ Elektromechanischer Schwinger dadurch gekennzeichnet, daß bei der Sonotrode die schweißseitige Stirnfläche ein- oder mehrfach konkav#ausgebildet ist, daß hervorstehende Kanten gebildet werden.Claims: @ Electromechanical transducer characterized by that in the case of the sonotrode, the welding-side end face is formed one or more times concave # is that protruding edges are formed. 2. Elektromechanischer Schwinger nach Anspruch 1 dadurch gekennzeichnet, daß die hervorstehenden Kanten an der schweißseitigen Stirnfläche der Sonotrode entweder parallel oder in bestimmten Winkeln zueinander angeordnet sein können.2. Electromechanical oscillator according to claim 1, characterized in that that the protruding edges on the welding-side face of the sonotrode can be arranged either parallel or at certain angles to each other. 3. Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 2 dadurch gekennzeichnet, daß die hervorstehenden Kanten verschiedene Höhen aufweisen können.3. Electromechanical oscillator according to one of claims 1 to 2 characterized in that the protruding edges have different heights can. LC, Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 3 dadurch gekennzeichnet, daß die schweißseitige Stirnfläche der Sonotrode mit ihren hervorstehenden Kanten nicht nur eben, sondern vornehmlich in Längsrichtung der zu verschweißenden Kunststoffbänder Tin- und Auslaufkrümmungen aufweisen können.LC, electromechanical oscillator according to one of Claims 1 to 3 characterized in that the welding-side end face of the sonotrode with their protruding edges not only flat, but mainly in the longitudinal direction of the Plastic strips to be welded can have tin and outlet curvatures. 5. Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 4 dadurch gekennzeichnet, daß die schweißseitige Stirnfläche mit ihren hervorstehenden Kanten nicht nur eben, sonder auch rillenförmig oder wellenförmig sein kann.5. Electromechanical oscillator according to one of claims 1 to 4 characterized in that the welding-side end face with its protruding Edges can be not only flat, but also groove-shaped or wave-shaped. 6. Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 5 dadurch gekannzeichnet, daß der Schwinger nicht nur aus einzelnen Koppelteilen und Sonotrode besteht, sondern Koppel teile und Sonotrode aus einem Stück Material gefertigt sein können.6. Electromechanical oscillator according to one of claims 1 to 5 being characterized in that the transducer is not only made up of individual coupling parts and Sonotrode consists, but coupling parts and sonotrode made from one piece of material could be. 7. Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 6 dadurch gekennzeichnet, daß das dazugehörige Unterwerkzeug nicht nur eben, sondern hochgestellte Kragen aufweisen kann.7. Electromechanical oscillator according to one of claims 1 to 6 characterized in that the associated lower tool is not just flat, but may have raised collar. 8. Slektromechanischer Schwinger nach einem der Ansprüche 1 bis 7 dadurch gekennzeichnet, daß das dazugehörige Unterwerkzeug in seiner Grundfläche nicht nur eben, sondern den erhabenen Konturen der schweißseitigen Stirnfläche der Sonotrode angepaßt sein kann.8. Slectromechanical oscillator according to one of Claims 1 to 7 characterized in that the associated lower tool in its base area not just flat, but the raised contours of the weld-side face of the Sonotrode can be adapted. 9* Elektromechanischer Schwinger nach einem der Ansprüche 1 bis 8 dadurch gekennzeichnet, daß der elektromechanische Schwinger eine oder mehrere, gleichgerichtete,oder zueinander verschieden gerichtete Bewegungen über die Fläche der zu verschweißenden Kunststoffbänder ausführen kann.9 * Electromechanical oscillator according to one of claims 1 to 8 characterized in that the electromechanical oscillator has one or more movements across the surface that are directed in the same direction or that are directed differently from one another of the plastic strips to be welded.
DE19772726137 1977-06-10 1977-06-10 Vibrator for supersonic welding of plastics components - has sonotrode with fluted or ribbed welding surface Withdrawn DE2726137A1 (en)

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DE19772726137 DE2726137A1 (en) 1977-06-10 1977-06-10 Vibrator for supersonic welding of plastics components - has sonotrode with fluted or ribbed welding surface

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427113A1 (en) * 1994-07-30 1996-02-01 Braun Ag Plastic deformation technique for fixing component, e.g. of metal, in plastic housing
EP1302272A1 (en) * 2001-10-10 2003-04-16 Ford Global Technologies, Inc. An ultrasonic welding tip and apparatus with this tip
US6612479B2 (en) 2001-10-10 2003-09-02 Ford Global Technologies, Llc Apparatus and method for joining layers of materials
US6691909B2 (en) 2001-10-10 2004-02-17 Ford Global Technologies, Llc Sonotrode for ultrasonic welding apparatus
EP3626475A3 (en) * 2018-09-20 2020-07-01 Bundesdruckerei GmbH Method for producing a data page and data page for a book document, and ultrasonic device for producing such a data page

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427113A1 (en) * 1994-07-30 1996-02-01 Braun Ag Plastic deformation technique for fixing component, e.g. of metal, in plastic housing
EP1302272A1 (en) * 2001-10-10 2003-04-16 Ford Global Technologies, Inc. An ultrasonic welding tip and apparatus with this tip
US6612479B2 (en) 2001-10-10 2003-09-02 Ford Global Technologies, Llc Apparatus and method for joining layers of materials
US6691909B2 (en) 2001-10-10 2004-02-17 Ford Global Technologies, Llc Sonotrode for ultrasonic welding apparatus
EP3626475A3 (en) * 2018-09-20 2020-07-01 Bundesdruckerei GmbH Method for producing a data page and data page for a book document, and ultrasonic device for producing such a data page

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