DE801041C - Verfahren zum Verschweissen von Gegenstaenden aus dielektrischen Stoffen - Google Patents

Verfahren zum Verschweissen von Gegenstaenden aus dielektrischen Stoffen

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Publication number
DE801041C
DE801041C DE1948P0013683 DEP0013683D DE801041C DE 801041 C DE801041 C DE 801041C DE 1948P0013683 DE1948P0013683 DE 1948P0013683 DE P0013683 D DEP0013683 D DE P0013683D DE 801041 C DE801041 C DE 801041C
Authority
DE
Germany
Prior art keywords
objects
temperature
welding
preheating
frequency
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.)
Expired
Application number
DE1948P0013683
Other languages
English (en)
Inventor
Kurt Dr Fraenz
Wilhelm Dr Runge
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Priority to DE1948P0013683 priority Critical patent/DE801041C/de
Application granted granted Critical
Publication of DE801041C publication Critical patent/DE801041C/de
Expired 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C66/45—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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces 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
    • B29C65/1403—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 type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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
    • B29C65/1432—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 direct heating of the surfaces 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching

Landscapes

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

Description

  • 4. Verfahren nach Anspruch I, dadurch gekennzeichnet, daß das Vorwärmen durch An-I,lasen der Grenzflächen mit einem warmen Luftstrom in einer kühleren Umgebung erfolgt.

Claims (3)

  1. Die Erfindung betrifft ein Verfahren zum Verschweinen von Gegenständen aus thermoplastische Stoffen unter Anwendung von elektrischer Hochfrequenzenergie.
    Es ist bekannt, Folien aus thermoplastischen Kunststoffen dadurch miteinander zu verschweißen, dall sie im elektrischen Hochfrequenzfeld erwärmt und durch Zusammendrücken miteinander vereinigt werden. Wenn die miteinander zu verschweißenden Gegenstände dicker sind als Folien, läßt sich dieses Verfahren grundsätzlicll ebenfalls anwenden, jedoch ergeben sich einige Schwierigkeiten dadurch, daß die Erwärmung sich auf den ganzen Körper erstreckt, während ein Bedarf dafür nur an der in Aussicht genommenen Verbindungsstelle besteht.
    Dies bedeutet nicht bloß einen nutzlosen Aufwand von Hochfrequenzenergie, sondern auch die Gefahr einer unerwünschten Form- und Gefügeänderung der Gegenstände. Dieser l,langel wird durch die Erlin(lung beseitigt.
    Gemäß der Erfindung werden die Verbindungsflächen der miteinander zu verschweißenden Gegenstünde zunächst durch Wärmeübertragung auf eine über der Raumtemperatur und unterhalb der Verschweißungstemperatur liegende Zwischentemperatur und anschließend im elektrischen Hochf requenzfeld auf die Verschweißungstemperatur gebraucht. Auf diese Weise besitzen die Grenzschichten, an denen die Verschweißung stattfindet, im Zeitpullkt der Anlegung des elektrischen Hochfrequenzfeldes eine höhere Temperatur als die übrige klasse der Gegenstände und erreichen die Schweißtemperatur, bei welcher die Kunststoffmasse plastisch wird, früher als diese. Dadurch werden mehrere Vorteile erzielt. X7or allem wird eine unwillkommene Verformung der Gegenstände vermieden. l)aiin tritt aber auch eine Ersparnis an teurer 1 {ochfrequenzenergie ein, weil das Vorwärmen der Grenzschichten mit billigerer VVärmeenergie erfolgt. Da das Vorwärmen außerhalb der Hochfrequenzbehandlungseinrichtung vorgenommen werden kann, wird diese von dem einzelnen Werkstück kürzere Zeit in Anspruch genommen, so daß sie eine hiillere Stundenleistung erreicht.
    I)as \'orwärmen der Grenzschichten der miteinwander zu verschweißenden Gegenstände kann auf verschiedene Weise erfolgen. In der Zeichnung sind die beiden Körper aus thermoplastischem Kunststoff, die miteinander verschweißt werden sollen, mit 1 und 2 bezeichnet. Um die Grenzschichten, an denen die Verschweißung stattfinden soll, vorzuwärlnen, wird zwischen sie ein Heizkörper 3 geschoben. Dieser kann beispielsweise einen im [iineren eingebetteten Heizwiderstand enthalten und elektrisch geheizt sein. Um das Iinfiihren des Heizkörpers in die Trennfuge zu erleichtern, wirc er zweckmäßig keilförmig ausgebildet. Der Heizkörper kann aber auch vor dem Einführen in die Tremlfuge von augen her durch Berührung mit einer heißen Atmosphäre oder einer heißen Unterlage auf die erforderliche Temperatur gebracht werden. An Stelle eines vollflächigen Heizkörpers kann auch ein vorgewärmtes oder durch Stromdurchgang erhitztes Drahtgebilde verwendet werden. Die Wärmeübertragung auf die Grenzflächen kann auch durch Bestrahlung derselben mit infraroten Strahlen erfolgen. Schließlich ist es auch möglich, das Vorwärmen durch Anblasen der Grenzfiächen mit einem warmen Luftstrom in einer kühleren Umgebung zu bewirken.
    Da die Wärmeausbreitung im Kunststoffkörper langsam vor sich geht, hat die Hauptmasse desselben beim Einführen in die Hochfrequenzbehandlungseinrichtung keine merklich erhöhte Temperatur, wenn das Vorwärmen kurz vorher vorgenommen worden ist, so daß der Erfindungszweck voll erreicht wird. Man könnte an sich die Grenzflächen auch auf die Verschweißungstemperatur selbst erwärmen und die Verschweißung ganz ohne Hochfrequenzbehandlung durchführen. Es hat sich jedoch gezeigt, daß letztere eine wesentlicll gleichmäßigere und innigere Verbindung ergibt und auch eine Abkürzung der Gesamtbehandlungsdauer zur Folge hat.
    PATENTANSPRÜCHE: I. Verfahren zum Verschweißen von Gegenständen aus thermoplastischen Kunststoffen, dadurch gekennzeichnet, daß die miteinander zu verbindenden Grenzflächen der Körper zunächst durch Wärmeiil)ertragung auf eine zwischen der Raum- und der Verschweiß ungstemperatur liegende Zwischentemperatur vorgewärmt und anschließend im elektrischen Hochfrequenzfeld auf die Verschweißungstemperatur gel>racht werden.
  2. 2. Verfahren nach Anspruch I, dadurch gekennzeichnet, daß das Vorwärmen durch Einführen eines vorzugsweise elektrisch geheizten Heizkörpers (3) zwischen die Grenzflächen erfolgt.
  3. 3. Verfahren nach Anspruch I, dadurch gekennzeichnet, daß das Vorwärmen durch 13estrahlen mit infraroten Strahlen erfolgt.
DE1948P0013683 1948-10-02 1948-10-02 Verfahren zum Verschweissen von Gegenstaenden aus dielektrischen Stoffen Expired DE801041C (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1948P0013683 DE801041C (de) 1948-10-02 1948-10-02 Verfahren zum Verschweissen von Gegenstaenden aus dielektrischen Stoffen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1948P0013683 DE801041C (de) 1948-10-02 1948-10-02 Verfahren zum Verschweissen von Gegenstaenden aus dielektrischen Stoffen

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DE801041C true DE801041C (de) 1950-12-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938499C (de) * 1951-02-13 1956-02-02 Siemens Ag Verfahren und Einrichtungen zur dielektrischen Herstellung von Schweissverbindungen zwischen mehreren Kunststoffkoerpern bei Verwendung einer regelbaren Vorerwaermung mittels Infrarotstrahlern
DE1056294B (de) * 1956-02-29 1959-04-30 Zeva Elek Zitaets Ges Smits & Waermeimpulsgeraet zum Schweissen thermoplastischer Kunststoffe
EP0261290A2 (de) * 1985-05-14 1988-03-30 Sekisui Kagaku Kogyo Kabushiki Kaisha Verfahren zum Verschliessen der Enden von in Längsrichtung verlaufenden Durchgängen in der Wand eines Kunststoffrohres

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938499C (de) * 1951-02-13 1956-02-02 Siemens Ag Verfahren und Einrichtungen zur dielektrischen Herstellung von Schweissverbindungen zwischen mehreren Kunststoffkoerpern bei Verwendung einer regelbaren Vorerwaermung mittels Infrarotstrahlern
DE1056294B (de) * 1956-02-29 1959-04-30 Zeva Elek Zitaets Ges Smits & Waermeimpulsgeraet zum Schweissen thermoplastischer Kunststoffe
EP0261290A2 (de) * 1985-05-14 1988-03-30 Sekisui Kagaku Kogyo Kabushiki Kaisha Verfahren zum Verschliessen der Enden von in Längsrichtung verlaufenden Durchgängen in der Wand eines Kunststoffrohres
EP0261290A3 (en) * 1985-05-14 1988-12-28 Sekisui Kagaku Kogyo Kabushiki Kaisha A method of closing the ends of longitudinally extending through-holes formed in the wall of a resin pipe
US4880579A (en) * 1985-05-14 1989-11-14 Sekisui Kagaku Kogyo Kabushiki Kaisha Method for closing openings of through-holes in a pipe wall

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