DE1704152A1 - Process and device for the continuous welding of thermoplastics - Google Patents

Process and device for the continuous welding of thermoplastics

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Publication number
DE1704152A1
DE1704152A1 DE19671704152 DE1704152A DE1704152A1 DE 1704152 A1 DE1704152 A1 DE 1704152A1 DE 19671704152 DE19671704152 DE 19671704152 DE 1704152 A DE1704152 A DE 1704152A DE 1704152 A1 DE1704152 A1 DE 1704152A1
Authority
DE
Germany
Prior art keywords
materials
heating
thermoplastics
welding
downstream
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
DE19671704152
Other languages
German (de)
Inventor
Ulf Dipl-Ing Kriebel
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.)
KRIEBEL ULF DIPL ING
Original Assignee
KRIEBEL ULF DIPL ING
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 KRIEBEL ULF DIPL ING filed Critical KRIEBEL ULF DIPL ING
Publication of DE1704152A1 publication Critical patent/DE1704152A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1445—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface heating both sides of the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B29C65/787—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains
    • B29C65/7873—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains using cooperating conveyor belts or cooperating conveyor chains
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/83—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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B29C65/1641—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1658—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser welding
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Landscapes

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

Description

Verfahren und Vorrichtung zum kontinuierlichten Verschwei#en von thermoplastischen Kunststoffen. Method and device for continuous welding of thermoplastics.

Die vorliegende erfindung betrifft ein Verfahren zum kontinuierlichen Verschwei#en von thermoplastischen Kunststoffen, bei dem die zu verschwei#enden Materialien zunächst einer Erhitzungszone zugeführt und anschlie#end unter Druck und gleichzeitiger Abkühlung miteinander verbunden werden, sowie eine zur Ausübung des Verfahrens geeignete Vorrichtung.The present invention relates to a method for continuous Welding of thermoplastics, in which the to be welded Materials are first fed to a heating zone and then under pressure and simultaneous cooling combined, as well as one for exercising device suitable for the process.

Durch die bekannten kontinuierlichen Schwei#verfahren lassen sich Nahtschwei#ungen bei Kunststoffolien oder Schlie#nähte bei Beuteln herstellen. Die zu diesem Zweck verwendeten Verfahren basieren auf der Wärmeübertragung durch medien, zum beispiel durch umlaufende, eine Wärme- und eine Kühlzone passierende arallel geführte teflonisierte Stahloänder, zwischen denen das Schwei#-gut verbunden und transportiert wird. Weiterhin sind zur Herstellung von kontinuierlichen Schwei#nähten Heizkeilschwei#maschinen bekannt, bei denen in einer flrhitzungszone die Kontaktwärme des Heizkeiles die zu verbindenden Flächen schmilzt und nachfolgend angeordnete Druckrollen bei gleichzeitiger Abkühlung der Schwei#-zone eine Verfestigug-der Naht bewirken. Au#erdem sind auch Vorrichtungen bekannt, bei denen Hei#luft oder Hei#gas zur Erzeugung der Schweißwärme herangezogen wird.The well-known continuous welding process allows Create seam welds on plastic films or seams on bags. the Processes used for this purpose are based on heat transfer through media, For example, through a circumferential, a heating and a cooling zone passing in parallel guided teflonized steel edges, between which the weld metal is connected and is transported. Furthermore, for the production of continuous weld seams Hot wedge welding machines are known in which the contact heat is in a heating zone of the heating wedge melts the surfaces to be connected and subsequently arranged Pressure rollers solidify the seam with simultaneous cooling of the welding zone cause. In addition, devices are also known in which hot air or hot gas is used to generate the welding heat.

Die zuvor oezeichneten Schwei#verfahren weisen den wesentlicnen Nachteil auf, daß die der Wärmeerzeugung und -äbertragung dienenden Maschinenelemente Verschlei#erscheinungen unterliegen, die im Gebrauch oftmals zu Störungen Anlaß geben. Diese können entweder mechanisch, beispielsweise durch das Reiben der Stahlbänder an den Schwei#nahtstellen, wie auch chemisch, zum Beispiel durch Verzunderung der Heizkeile infolge des Einflusses des iJuftsauerstoffes und der bei dem Verschweißen entstehenden Verbrennungsprodukte, verursacht werden. 3ei HeißluBtschweißmaschinen wird ein erhöhter Aufwand durch ein Gebläse erforderlich, außerdem sind Gase nur schlechte Wärmeübertrager.The welding processes described above have the major disadvantage that the machine elements used for heat generation and transfer appear to be wearing out subject, which often give rise to malfunctions in use. These can be either mechanically, for example by rubbing the steel strips at the weld seams, as well as chemically, for example through scaling of the heating wedges as a result of the influence the oxygen in the air and the products of combustion resulting from welding, caused. With hot air welding machines, an increased effort is required a fan is required, and gases are poor heat exchangers.

Die der vorliegenden Erfindung zugrunde liegende Aufgabe besteht darin, ein Verfahren sowie eine Vorrichtung zum kontinuierlichen Verschwei#en von thermoplastischen Kunststoffen zu schaffen, bei dem mechanische und chemische Aonutzungserscheinungen, die zu Störungen des Schwei#betriebes führen könnten, ausgeschaltet sind.The object on which the present invention is based is to a method and an apparatus for continuous Welding of thermoplastics to create, involving mechanical and chemical Signs of use that could lead to welding disruptions are switched off are.

Erfindungsgemä# wird die gestellte Aufgabe dadurch gelöst, da# die Erhitzufng der zu verbindenden Materialien durch konzentrierte Wärmestrahlung erfolgt. Durch Anwendung der Wärmestrahlung lassen sich darüberhinaus höhere Transport- bzw. Fertigungsgeschwindig-Keiten erzielen. Die zu verschwei#enden Materialien durchlaufen eine Zone dichter Wärmestrahlung und werden anschlie#end unter gleichzeitiger Abkühlung einer Druckeinwirkung ausgesetzt.According to the invention, the problem posed is achieved in that the The materials to be joined are heated by concentrated thermal radiation. In addition, the use of thermal radiation enables higher transport or Achieve manufacturing speeds. Pass through the materials to be welded a zone of dense thermal radiation and are then cooled down at the same time exposed to pressure.

Eine zur Ausübung des Verfahrens besonders geeignete Vorricntung -unter Verwendung einer Heizeinrichtung sowie einer Fördereinrichtung für die zu verbindenden thermoplastischen Materialien mit diesen nachgeordneten Pressorganen, sowie ggf. einer nachgeschalteten Kühlvorrichtung - ist erfindungsgemä# dadurch gekennzeichnet, da# die Heizeinrichtung aus einem linienförmigen Wämestrahler besteht, der im Brennpunkt eines der Strahlerlänge entsprechenden konkaven Reflektors angeordnet ist, wobei diesem gegenüber ein im Scheitelpunkt Òeteilter, zum Auffangen der vom RefleKtor einfallenden Wärmestrahlung dienender Honlspiegelsammler vorgeseiien ist, in dessen Brennpunkt die zu verbindenden Materialien angeordnet sind, wobei das Spiegelsystem nach iiasser oder Luft gekühlt werden kann. Durch die erfindungsgemä#e Ausführungsform ist sichergestellt, daß mechanische Verschlei#erscheinungen oder chemiscne Umwandlungen der Heizquelle während des Schwei#vorganges infolge fehlenden mechanischen Kontakts mit dem Schwei#gut nicht auftreten können. Es besteht dabei die Möglichkeit, die erfindungsgemäße Schweißvorrichtung an den zu verbindenden Nunststoffteilen vorbeizuführen.A device that is particularly suitable for carrying out the method - below Use of a heating device and a conveyor device for the to be connected thermoplastic materials with these downstream pressing elements, as well as possibly a downstream cooling device - is characterized according to the invention #, because # the heating device consists of a linear heat radiator, which is in the focal point one of the radiator length corresponding concave reflector is arranged, wherein Opposite this one divided at the apex to catch the reflector incident heat radiation serving honing mirror collector is provided in which Focal point the materials to be joined are arranged, the mirror system can be cooled by water or air. By the embodiment according to the invention it is ensured that mechanical wear and tear or chemical transformations the heat source during the welding process due to a lack of mechanical contact can not occur with the sweat. There is the possibility of using the according to the invention To lead the welding device past the plastic parts to be joined.

Eine weitere vorteilhafte Ausführungsform nach der Erfindung ist dadurch gegeben, daß unterhalb des Scheitelpunktes des Hohlspiegelsammlers Förderbänder für die zu verschweißenden Materialien angeordnet sind. In diesem Falle besteht die Möglichkeit, die Schweißvorrichtung stationär anzuordnen und die zu verschweißenden Kunststoffmaterialien durch die Schwei#vorrichtung zu bewegen.Another advantageous embodiment according to the invention is thereby given that conveyor belts below the apex of the concave mirror collector for the materials to be welded are arranged. In this case there is the possibility of arranging the welding device stationary and the to be welded Moving plastic materials through the welding device.

Eine weitere vorteilhafte Aus£ührungsform nach der Erfindung ist dadurch gegeben, daß als Heizeinrichtung eine Laser-Wärmequelle vorgesehen ist. Der Laserstrahl wird auf die zu verschmelzenden Zonen des Schwei#gutes gerichtet und ermöglicht infolge seiner scharfen Bündelung eine konzentrierte Erwärmung des Schwei#gutes und damit hohe Transport- und Fertigungsgeschwindigkeit.A further advantageous embodiment according to the invention is thereby given that a laser heat source is provided as the heating device. The laser beam is aimed at the areas of the weldment to be fused and made possible due to its sharp bundling, a concentrated heating of the weld metal and thus high transport and production speed.

Die Erfindung wird im folgenden anhand eines in der eichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is illustrated below with reference to one in the drawing Embodiment explained in more detail.

Dabei zeigen: Figur 1 das Prinzip der Schweißvorrichtung im zuerschnitt gesehen; Figur 2 eine Seitenansicht der Vorrichtung gemäß Figur 1, teilweise im Schnitt.They show: FIG. 1 the principle of the welding device in a cut seen; Figure 2 is a side view of the device according to Figure 1, partially in Cut.

Die Schwei#vorrichtung besteht im wesentlicnen aus einem paraoolisch oder äalbkreisfömig ausgebildeten Reflektor 1, in dessen 3rennpunkt ein linienförmiger Wärmestrahler 2 (Quarzstrahler) angeordnet ist. Zum Auffangen der vom Reflektor 1 ausfallenden wärmestrahlung ist ein Hohlspiegelsammler 3 vorgesehen, der in seinem Scheitelpunkt geteilt ist. Unterhalb des Scheitelpunktes des Hohlspiegelsammlers 3 ist ein über Förderrollen 4 geführtes Förderbandpaar 5 vorgesehen, das sum Transport eines zu verschlie#enden Kunststoffbeutels 6 dient. Dabei liegt die herzustellende Naht im ßrennpunkt 8 des Hohlspiegelsammlers 3. In Förderrichtung gesehen folgen kühlende und kunststoffabweisende Pressrollen 7 zur endgültigen Fixierung der hergestellten Schwei#-naht.The welding device essentially consists of a paraoolic or äalbkreisfömig formed reflector 1, in whose 3rennpunkt a linear one Heat radiator 2 (quartz radiator) is arranged. To collect from the reflector 1 failing thermal radiation, a concave mirror collector 3 is provided in his Vertex is split. Below the apex of the concave mirror collector 3, a pair of conveyor belts 5 guided over conveyor rollers 4 is provided, the sum transport a plastic bag 6 to be closed is used. Here is the one to be produced Seam at the separation point 8 of the concave mirror collector 3. Follow this as seen in the conveying direction cooling and plastic-repellent press rollers 7 for the final fixation of the produced Weld # -seam.

4 Patentansprüche4 claims

Claims (4)

P A T E N T A N S P R U C H E 1. Verfahren zum kontinuierlichen Verschweißen (Nahtschwei#en) von thermoplastischen Kunststoffen, bei dem die zu verschweissenden Materialien zunächst einer Erhitzungszone zugeführt und anschließend unter Druck und gleichzeitiger Abkühlung miteinander verbunden werden, d a d u r c h g e k e n n z e i c h n e t, daß die Erhitzung der zu verbindenden Materialien durch konzentrierte Wärmestrahlung erfolgt. P A T E N T A N S P R U C H E 1. Process for continuous welding (Seam welding) of thermoplastics, in which the to be welded Materials first fed to a heating zone and then under pressure and simultaneous cooling are combined with each other, d u r c h e k e It should be noted that the heating of the materials to be joined by concentrated Thermal radiation takes place. 2. Vorrichtung zur Ausübung des Verfahrens nach aspruch 1, unter Verwendung einer Heizeinrichtung sowie einer Fördereinrichtung für die zu verbindenden thermoplastischen Matrialien, diesen nachgeordneten Pressorganen, sowie ggf. einer nachgeschalteten Kühlvorrichtung, d a d u r c h g e k e n n z e i c h n e t, daß die Heizeinrichtung aus einem linienförmigen alarvestrahler (2) besteht, der im brennpunkt eines der Strahlerlänge entsprechenden konkaven Reflektors (1) angeordnet ist, wobei im Strahlengang diesem gegenüberliegend ein in seinem Scheitelpunkt geteilter zum Auffangen der voui Reflektor (1) einfallenden Wärmestrahlung dienender Hohlspiegelsammler (3) vorgesehen ist, in dessen Brennpunkt (8) die zu verbindenden Materialien (6) angeordnet sind.2. Device for performing the method according to claim 1, using a heating device and a conveying device for the thermoplastics to be connected Matrialien, these downstream press organs, and possibly a downstream one Cooling device, d a d u r c h e k e n n n e i c h n e t that the heating device consists of a linear alarm radiator (2), which is placed in the focal point of one of the Radiator length corresponding concave reflector (1) is arranged, wherein in the beam path Opposite this, a split in its apex to catch the voui reflector (1) incident Concave mirror collectors used for thermal radiation (3) is provided, in whose focal point (8) the materials to be connected (6) are arranged. . Vorrichtlng nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, da# unterhalb des Scheitelpunktes des Hohlspiegelsammlers (3) Förderbänder (5) für die zu verschweibenden Materialien (6) angeordnet sind.. Device according to claim 2, d u r c h g e n n n z e i c h n e t, da # below the apex of the concave mirror collector (3) conveyor belts (5) for the materials (6) to be welded are arranged. 4. Vorrichtung zur Ausübung des Verfahrens nach Anspruch 1, unter Verwendung einer Heizeinrichtung sowie einer Fördereinrichtung für die zu verbindenden thermoplastischen haterialien und diesen nachgeordneten Sressorganen sowie ggf. einer nachgeschalteten Kühlvorrichtung, d a d u r c h g e k e n n z e i c h n e t, daß als Heizeinrichtung eine liaser-Wärmequelle vorgesehen ist.4. Apparatus for performing the method according to claim 1, below Use of a heating device and a conveyor device for the to be connected thermoplastic materials and these subordinate stress organs as well as possibly a downstream cooling device, d u r c h e k e n n z e i c h n e t that a laser heat source is provided as the heating device. LeerseiteBlank page
DE19671704152 1967-10-09 1967-10-09 Process and device for the continuous welding of thermoplastics Pending DE1704152A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464507A2 (en) * 1990-07-04 1992-01-08 Firma Theodor Hymmen Method and apparatus for the continuous manufacture of planar, resin containing laminates

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464507A2 (en) * 1990-07-04 1992-01-08 Firma Theodor Hymmen Method and apparatus for the continuous manufacture of planar, resin containing laminates
EP0464507A3 (en) * 1990-07-04 1992-05-13 Firma Theodor Hymmen Method and apparatus for the continuous or discontinuous manufacture of planar laminates

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