DE2423321A1 - Plastics sheet continuously welded by electrically heated wire - pressing into sheet as it rolls around insulated wheel - Google Patents

Plastics sheet continuously welded by electrically heated wire - pressing into sheet as it rolls around insulated wheel

Info

Publication number
DE2423321A1
DE2423321A1 DE2423321A DE2423321A DE2423321A1 DE 2423321 A1 DE2423321 A1 DE 2423321A1 DE 2423321 A DE2423321 A DE 2423321A DE 2423321 A DE2423321 A DE 2423321A DE 2423321 A1 DE2423321 A1 DE 2423321A1
Authority
DE
Germany
Prior art keywords
wheel
welding
wire
welding device
area
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
Application number
DE2423321A
Other languages
German (de)
Inventor
Heinz Hinterseer
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.)
KIEFEL KOERTING GmbH
Original Assignee
KIEFEL KOERTING 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 KIEFEL KOERTING GmbH filed Critical KIEFEL KOERTING GmbH
Priority to DE2423321A priority Critical patent/DE2423321A1/en
Publication of DE2423321A1 publication Critical patent/DE2423321A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • 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
    • 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
    • B29C65/226—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip characterised by the cross-section of said heated wire, resistive ribbon, resistive band or resistive strip, e.g. being triangular
    • 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
    • B29C65/229—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for tensioning said heated wire, resistive ribbon, resistive band or resistive strip
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7433—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a wire
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7439—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for continuously and longitudinally welding and severing webs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps

Abstract

A seal welding appts. for continuously joining (or sealing and cutting) thermoplastics or partly thermoplastics strip comprises an endless, electrically heated bright wire, or round, flat, oval, or polygonal section, which is tensioned and applied to the sheets as they run around a portion only of the circumference of a revolving wheel; the face of the wheel is electrically and thermally insulated and the operation takes place without slip, the wheel, sheets and wire-all moving at the same angular speed. The wire is itself pref. the electrical conductor, with a relatively short hot length between contact pulleys and a longer, higher-resistance length tensioned by an adjustable jockey wheel. Heating of the wire occurs only in the contact zone, the cooling run of the sheet being relatively long; this permits welding temps. only slightly above the fusion temp. of the sheet to be used, with a high welding speed.

Description

Kontinui erl iche Schwei ßworrichtung für thermoplastische oder tei Ithermoplastische Folien". Continuous welding equipment for thermoplastic or part "Thermoplastic Films".

Die Erfindung bezieht sich auf eine Vorrichtung zum fortlaufenden Herstellen von Schweißnähten, bei der die Folienbahnen aus thermoplastischem oder teil thermoplastischem Kunststoff zwischen einem endlosen, über einen über ein Rollsystem geführten, durch elektrische Energie erwärmten blanken Draht und einem stirnseite 3 thermisch isolierten Rad reibungsfrei angepreßt, bis zur Plastifizierung bzw. zum Schweißen gebracht werden.The invention relates to a device for continuous Manufacture of weld seams in which the film webs made of thermoplastic or part thermoplastic between an endless, over a over a roll system guided bare wire heated by electrical energy and an end face 3 thermally insulated wheel pressed on without friction until plasticization or be made to weld.

Der Erfindungsgedanke liegt darin, daß die Erwärmung des blanken, endlosen Schweißdrahtes nur in der Schweißzone hervorgerufen wird, und die nicht beheizte Zone zum lanJ-samen Erstarren des Kunststoffes verwendet werden kann.The idea of the invention is that the heating of the bare, endless welding wire is only produced in the welding zone, and that is not heated zone can be used for the long-term solidification of the plastic.

Somit kann bei einer Erwärmun#stemperatur, die nicht wesentlich höher als die Schmeiztemperatur des zu schwei.3enden Kunststoffes liegt, eine hohe Nahtgeschwindijkeit erzielt werden.Thus, at a heating temperature that is not significantly higher than the melting temperature of the plastic to be welded, a high seam speed be achieved.

Bei den herkömmlichen Verfahren konnten solche Schwei;3un 3en nur taktweise vorgenommen werden, oder man verwendete eioe Doppelfolie, wobei der wärmewiderstandsfähigere ihi gere Kunststoff, wie Gewebe, Papier udgl., einem beheizten Band oder Rad zugewandt wurde und somit die Schmelztemperatur nur mit Verzögerung erzielt wurde, was als Nachteil eine nur geringe Nahgeschwindigkeit ergab. Diese Verfahren erwiesen sich bei geradlinigen, dünnen bzw. schmalen Schweißnähten an teilkristallinen Stoffen, wie Vvelchpolyüthylen als unbefriedigend.Such welds could only be achieved with conventional methods be made in cycles, or you used a double foil, the more heat-resistant ihi ger plastic, such as tissue, paper, etc., facing a heated belt or wheel was and thus the melting temperature was achieved only with a delay, what as Only a minor disadvantage Near speed revealed. These procedures proved with straight, thin or narrow weld seams on partially crystalline Substances such as Vvelchpolyüthylen as unsatisfactory.

Der Erfindung liegt nun die Aufgabe zugrunde, eine Schweißvorrichtung zu schaffen, bei welcher eine schmale und trotzdem sichere sowie dichte SchweI.#naht an Kunststoffolien, hauptsächlich an Weichpolyäthylen erzielt werden kann, fie mit dem bisher bekannten Verfahren nicht bei hoher Nahtgeschwindigkeit erzielt werden konnte.The invention is now based on the object of a welding device to create a narrow, yet secure and tight weld. # seams on plastic films, mainly on soft polyethylene, can be achieved with the previously known method cannot be achieved at high seam speeds could.

Erfindungsgemäß wird dies, wie in Abb. 1 dargestellt, dadurch gelöst, daß die zur Schweif3ung erforderliche Ener:jie einem endlosen, im Bereich der Kontakträder 1 und 3 und der elektrischen Spannung befindlichen rund-, flach-, ovalodervleleckförmigen Metalldraht entnommen und direkt den von den Rollen 20 und 21 kommenden und in Pfeilrichtunq 93, 24, 25 und in Punkt 8 einlaufenden Folien zugeführt.According to the invention, as shown in Fig. 1, this is achieved by that the energy required for the curve: it is endless, in the area of the contact wheels 1 and 3 and the electrical voltage are round, flat, oval or square-shaped Metal wire removed and directly the coming from the rollers 20 and 21 and in Pfeilrichtunq 93, 24, 25 and in point 8 incoming foils.

Der übrige Bereich des Drahtes mit weitaus höherem Widerstand zwischen Kontaktrad 3 über das potentialfreie Spannrad 5 und Kontaktrad 1 hat somit durch die Länge einen weitaus geringeren Spannungsabfall, und somit wird eine Abkühlung erzielt. Das Spannrad 5 mit einem einstellbaren Zu3-federsystem dient auch zur Bestimmung der Eindringtiefe, welche bis zum Trennen der Schweißnaht führen kann. Die Folie verläßt im geschweißten Zustand 7 in Pfeilrichtung 26 die elektrisch sowie thermisch isolierte Umfangsfläche 6 des frei laufenden Schweißrades 2 und wird von der Abzugsvorrichtung 10 bis auf die Aufwickelrolle 27 transportiert und aufgerollt.The remaining area of the wire with much higher resistance between Contact wheel 3 via the potential-free tensioning wheel 5 and contact wheel 1 has thus been through the length has a much smaller voltage drop, and thus becomes a cooling off achieved. The tensioning wheel 5 with an adjustable Zu3-spring system is also used for determination the depth of penetration, which can lead to the separation of the weld seam. The foil leaves in the welded state 7 in the direction of arrow 26 the electric and thermally insulated peripheral surface 6 of the free-running welding wheel 2 and is transported from the take-off device 10 to the take-up roll 27 and rolled up.

Mit besonderem Vorteil kann die Erfindung dort angewendet werden, wo eine hohe Nahtgeschwine Jl<eit verlangt wird. Diese Geschwindi Jkeit ist im direkten Verhältnis zu der Auslegungsgröße des Antriebsrades 2, bzw. Länge des zur Schweißung verfügbarem Bereich des Drahtes zwischen den Kontakträdern 1 und 3.The invention can be used with particular advantage there, where a high seam speed is required. This speed is in direct relationship to the design size of the drive wheel 2, or length of the to Weld the available area of the wire between the contact wheels 1 and 3.

Ist zum Beispiel bei einem-Kunststoff eine Schweißzeit von etwa 1 sec. nötig, und die Länge des Schweißbereiches zwischen Kontaktrad 1 und 3 beträgt 1 m, so kann mit einer Nahtgeschwindigkeit von etwa 60 rn pro Minute gerechnet werden. Wird di eser Bereich bzw.For example, if a plastic has a welding time of about 1 sec. necessary, and the length of the welding area between contact wheel 1 and 3 is 1 m, a seam speed of around 60 m per minute can be expected. If this area or

Durchmesser des Rades 2 in dieser Weise vergrößert, daß sich ein längerer Schweißbereich bildet, so kann dementsprechend die Nahtgeschwindi gkei t erhöht werden Nicht zuletzt stellt ciie Erfindung auch die Möglichkeit, die bei den bisher bekannten Verfahren auftretenden Schrumpfungen weitgehendst zu unterbinden, da sich während des Schweißvorganges die Folien unter einer ständigen Spannung zwischen Bremsvorrichtung 9 und Abzugsvorrichtung 10 befinden.Diameter of the wheel 2 increased in this way that a longer one Forms welding area, the seam speed can be increased accordingly Last but not least, ciie invention also provides the possibility that with the previously known processes to prevent shrinkage as much as possible, since during the welding process the foils are under constant tension between Brake device 9 and trigger device 10 are located.

Das erfindungsgemäße Verfahren kann, wie es in Abb. 2 dargestellt ist, In der erweiterten Form derart angewendet werden, daß bei Verlegung des Kontaktrades 3 nach 31 sich zwischen diesem und einem zusätzlichen spannungsfreien Abrollrad 11 ein abkühlender Bereich bildet, und nun als Nachwirkzeit dient.The method according to the invention can, as shown in FIG is to be used in the extended form in such a way that when relocating the contact wheel 3 to 31 is between this and an additional tension-free unrolling wheel 11 forms a cooling area, and now serves as an after-effect time.

Gemäß einer weiteren Ausbildung der Erfindung ist in Abb. 3 ersichtlich gemacht, daß bei einer Durchmessererweiterung des Kontaktrades 3 zwischen Punkt 15 und 16 komplett die Spannung entfällt, was zu einem schnellen Abkühlen des Drahtes, bzw. zu einem günstigen Nachwirkzeitbereich führt. Erforderlich bei diesem Verfahren wird ein Zusatzband 14 aus einem wärmewiderstandsfähiyen Material, welches die Aufgabe hat, mit Hilfe der zusätzlichen Rolle 12 und Spannrad 13 die Anpressung der verschwelßten Folie 7 im Bereich 15 bis Abrollrad 12 - effektive Nachwirkzeit -zu vervollständigen.According to a further embodiment of the invention, FIG. 3 can be seen made that with a diameter expansion of the contact wheel 3 between point 15 and 16 completely the tension is omitted, which leads to a rapid cooling of the wire, or leads to a favorable post-action time range. Required for this procedure is an additional tape 14 made of a heat-resistant material, which the task has, with the help of the additional roller 12 and tensioning wheel 13, the pressure of the welded Foil 7 in area 15 to roller 12 - effective post-action time - to be completed.

Claims (10)

PATENTANSPRÜCHEPATENT CLAIMS 1. Schweißvorrichtung zum Herstellen von kontinuierlichen Schweißnähten an Folienbahnen aus thermoplastischem Kunststoff'oder teil thermoplastischem Material, dadurch gekennzeichnet, daß die zur Plastifizierung erforderliche Wärmeenergie von einem rollenden, elektrisch erwärmten, endlosen, blanken, beschichteten oder teilbeschichteten rund-, flachs, oval-, oder vieleckförmigen Metalldraht entnommen wird und mit Hilfe der vorhandenen Spannung direkt dem zu schweißtenden Material, welches sich über die elektrisch und thermisch isolierte Mantelfläche eines drehbaren Rades abrollt, reibungsfrei in angepreßtem Zustand, dermaßen zugeführt wird, daß eine Schweißung oder Trennschwelßung bei gleichbleibender Winkelgeschwindigkei t zwischen Draht, Schweißgut und Mantelfläche des Rades stattfindet.1. Welding device for producing continuous weld seams on film webs made of thermoplastic material or partially thermoplastic material, characterized in that the heat energy required for plasticization of a rolling, electrically heated, endless, bare, coated or partially coated round, flat, oval or polygonal metal wire is removed and with the help the existing tension directly to the material to be welded, which is about rolls the electrically and thermally insulated surface of a rotating wheel, friction-free in the pressed-on state, so supplied that a weld or separating welding with constant angular speed between the wire, Weld deposit and surface of the wheel takes place. 2. Schweißvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Draht die Funktion als leitendes Element sowie als schweißendes Element übernimmt. 2. Welding device according to claim 1, characterized in that the wire takes on the function of a conductive element as well as a welding element. 3. Schweißvorrichtung nach Anspruch 1 - 2, dadurch gekennzeichnet, daß die Drahtlänge derart ausgelegt wird, daß die zur Schweißung erforderliche Erwärmung nur in einem verhältnismäßig kurzen Bereich zwischen den Kontakträdern (l> und (3> mit geringerem Widerstand hervorgerufen wird. 3. Welding device according to claim 1 - 2, characterized in that that the wire length is designed in such a way that the heating required for welding only in one relatively short area between the contact wheels (l> and (3> is produced with less resistance. 4. Schweißvorrichtung nach Anspruch 1 - 3, dadurch gekennzeichnet, daß im Abkühlbereich zwischen Kontaktrad (3> und (1) sich ein justlerbares, potentialfreies Spannrad befindet, welches einerseits zum Rückführen, und ahdererseits zum Spannen bzw. zur Bestimmung der Schwei ßeindringtiefe im Schweißbereich vorgesehen ist.4. Welding device according to claim 1 - 3, characterized in that that in the cooling area between the contact wheel (3> and (1) there is an adjustable, potential-free Tensioning wheel is located, which on the one hand for returning, and on the other hand for tensioning or to determine the welding penetration depth in the welding area. 5. Schweißvorrichtung nach Anspruch 1 - 4, dadurch gekennzeichnet, daß bei Erweiterung des Schweißgerätes (Abb. 2) durch die Verlegung des Kontaktrades (3) nach (31)) eine kurze Abhebung vorgenommen wird, wodurch Im unmittelbar'nachfolgenden Bereich die Abkühlung stattfindet, nämlich von Kontaktrad (31) bis Abrollrad (11) zum Nachwirken, bzw. zum Erstarren des Kunststoffes unter gleichbleibendem Druck vorgesehen ist.5. Welding device according to claim 1 - 4, characterized in that that when expanding the welding machine (Fig. 2) by relocating the contact wheel (3) after (31)) a short withdrawal is made, whereby Im immediately'following Area where cooling takes place, namely from the contact wheel (31) to the roll-off wheel (11) for after-effects or for solidification of the plastic under constant pressure is provided. 6. Schweißvorrichtung nach Anspruch 1 - 5, dadurch gekennzeichnet, daß bei Erweiterung der Vorrichtung (Abb. 3) die Nachwirkzelt weiter begünstigt werden kann, Indem das Kontaktrad (3) derart im Durchmesser vergrößert wird, wodurch im Bereich (15) bis (16} der elektrische Spannungsabfall gleich Null ist, und somit eine rapide Abkühlung stattfinden kann.6. Welding device according to claim 1 - 5, characterized in that that when the device is expanded (Fig. 3), the after-effect tent further favors can be, by the contact wheel (3) is so enlarged in diameter, whereby in the range (15) to (16} of the electrical voltage drop equal Is zero, and thus rapid cooling can take place. 7. Schweißvorrlchtung nach Anspruch 6, dadurch gekennzeichnet, daß der Bereich (15> bis Abrollrad (12) zur verlängerten Nachwirkzeit dient. 7. Welding device according to claim 6, characterized in that the area (15> to the roll-off wheel (12) is used for the extended post-action time. 8. Schweißvorrichtung nach Anspruch 6 und 7, dadurch gekennzeichnet, daß ein zusätzliches endloses, elektrisch und thermisch isolierendes, mitrollendes Polytetrafluoräthylenband, gespannt über Spannrad (13) zum Anpressen des Schweißgutes während der Nachwirkzeit im Bereich (15) bis Abrollrad (12) dient. 8. Welding device according to claim 6 and 7, characterized in that that an additional endless, electrically and thermally insulating, rolling one Polytetrafluoroethylene tape, stretched over a tensioning wheel (13) for pressing on the weld metal is used during the post-action time in the area (15) to the unrolling wheel (12). 9. Schweißvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zur Verhinderung der Schrumpfung des zu schweißenden Materials von den Abwickelrol len (20) und (21) durch eine Bremsvorrichtung (9) geführt und gebremst wird, sowie nach Verlassen des Schweißgutes Im geschweißten Zustand (7) von der Abzugsvorrichtung (10) gespannt wird. 9. Welding device according to claim 1, characterized in that to prevent the material to be welded from shrinking from the unwinding roller len (20) and (21) is guided and braked by a braking device (9), as well as after leaving the weld metal in the welded state (7) by the trigger device (10) is stretched. 10. Schweißvorrichtung nach Anspruch 1 - 9, dadurch gekennzeichnet, daß mehrere Nähte mit gleichzeitig parallel laufenden erwärmten Drähten geschweißt werden können.10. Welding device according to claim 1 - 9, characterized in that that several seams are welded with heated wires running in parallel at the same time can be. leerseite blank page
DE2423321A 1974-05-14 1974-05-14 Plastics sheet continuously welded by electrically heated wire - pressing into sheet as it rolls around insulated wheel Pending DE2423321A1 (en)

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DE2423321A DE2423321A1 (en) 1974-05-14 1974-05-14 Plastics sheet continuously welded by electrically heated wire - pressing into sheet as it rolls around insulated wheel

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DE2423321A DE2423321A1 (en) 1974-05-14 1974-05-14 Plastics sheet continuously welded by electrically heated wire - pressing into sheet as it rolls around insulated wheel

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224808A1 (en) * 1985-11-29 1987-06-10 Hoechst Aktiengesellschaft Apparatus for continuously welding or sealing seams of plastic films

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224808A1 (en) * 1985-11-29 1987-06-10 Hoechst Aktiengesellschaft Apparatus for continuously welding or sealing seams of plastic films
US4746391A (en) * 1985-11-29 1988-05-24 Hoechst Aktiengesellschaft Apparatus for continuous welding or sealing of seams of plastic films

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