DE2623005A1 - Machine for welding thermoplastic film - increases welding speed and also seam strength - Google Patents

Machine for welding thermoplastic film - increases welding speed and also seam strength

Info

Publication number
DE2623005A1
DE2623005A1 DE19762623005 DE2623005A DE2623005A1 DE 2623005 A1 DE2623005 A1 DE 2623005A1 DE 19762623005 DE19762623005 DE 19762623005 DE 2623005 A DE2623005 A DE 2623005A DE 2623005 A1 DE2623005 A1 DE 2623005A1
Authority
DE
Germany
Prior art keywords
welding
machine
thermoplastic film
seam strength
increases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19762623005
Other languages
German (de)
Inventor
Peter Fischer
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 DE19762623005 priority Critical patent/DE2623005A1/en
Publication of DE2623005A1 publication Critical patent/DE2623005A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • B29C66/00441—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool movable, e.g. mounted on reels
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B29C65/38—Impulse heating
    • 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
    • B29C66/40—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

Landscapes

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

Abstract

Films to be welded are held between a pair of endless moving bands of polyimide. Heat is applied through these bands. The welded parts then move, with the bands away from the heater, and are held in contact by the polyimide band until the weld has cooled. Thus the heater is freed for re-use before the weld has cooled, and the rate of working is increased. The endless moving bands may be of a different heat-resistive material for polyimide.

Description

Gerät zum Verschweißen von thermoplastischen Folien Device for welding thermoplastic foils

Dem Neuerungsgedanken lag zugrunde ein Gerät zu schaffen, welches die herkömmlichen Schweißgeräte zum Formverschweißen von dünnen Folien im wesentlichen verbessern soll, so daß sowohl die Schwei:>geschwindigkeit als auch die Nahtfestigkeit erhöht werden.The idea of innovation was based on creating a device that the conventional welding devices for welding thin foils in shape essentially to improve, so that both the welding:> speed and the seam strength increase.

Die herkömmlichen Gerne zum Verschweißen von dünnen thermoplastischen Folien arbeiten alle auf dem Prinzip "Einwirkzeit + Nachwirkzeit".The conventional likes to weld thin thermoplastic Films all work on the principle of "exposure time + post-exposure time".

Der Gedanke lag nun darin, diese beiden Zeiten zusammenzuschrumpfen bzw. wesentlich zu verkürzen.The idea now was to shrink these two times together or to shorten it significantly.

Es wurde dafür das übliche Wärmeimpul sverfahren umgangen und dafür ein wesentlich höher temperierter dauerbezeihten Schweißsteg (1) mit Temperaturen bei z.B. 350°C, welcher die erforderliche Siegelenergie durch ein verschleißarmes, hochtemperierbeständiges Polyimid auf das Schweißgut abgibt, verwendet. Die Verwendung des Polyimidbandes als Trennfolie begünstigt den Energiedurchgang und somit können die Einwirkzeiten um ca. 405 herabgesetzt werden.The usual heat pulse method was bypassed and for this a significantly higher tempered permanent weld bar (1) with temperatures at e.g. 350 ° C, which the required sealing energy through a low-wear, high temperature resistant polyimide releases on the weld metal. The usage The polyimide tape as a separating film promotes the passage of energy and thus allows you to the exposure times can be reduced by approx. 405.

Das wesentliche an dem neuen Gerät ist, daß die endlose Trennfolie (2) nach der Einwirkzeit nicht abgehoben wird. Sie bleibt auf dem Cchwei«-gut (3) liegen, wird gemeinsam weitertransportiert und erst nach einigen Takten, wenn die Schweißnaht abgekühlt ist, abgehoben.The essential thing about the new device is that the continuous release film (2) is not lifted off after the exposure time. She stays on that Good (3) are transported further together and only after a few cycles, if the weld seam has cooled down, lifted off.

Ergebnis: Die Nachwirkzeit bzw. das Her abkühlen des plastifizierten Materials entfällt aus der gesamten Taktzeit der herkömmlichen Geräte.Result: The post-action time or the cooling down of the plasticized Materials are omitted from the entire cycle time of conventional devices.

L e e r s e i t eL e r s e i t e

Claims (2)

SCHUTZANSPRÜCHE 1. Schweißgerät zum Verschweiben von thermoplastischen Folien dadurch geknnzeichnet, daß die zur Schweißung erforderliche thermische Energie über eine verschleißarme, hochtemperaturbeständige Polyimidfolie dem Schweißgut zugeführt wird, und nach der Einwirkzeit nicht vom Schwei3gut sofort sondern liegend weitertransportiert und erst nach Abkühlen der geschweißten Nähte abgehoben wird. PROTECTION CLAIMS 1. Welding device for welding thermoplastics Foils characterized in that the thermal energy required for welding The weld metal via a low-wear, high-temperature-resistant polyimide film is fed, and after the exposure time not from the weld metal immediately but lying down is transported further and is only lifted off after the welded seams have cooled down. 2. Schweißgerät nach Anspruch 1, dadurch geknnzeichnet, daß die Trennfolie auch aus einem anderen thermobeständigen Material sein kann, jedoch im endlosen Zustand im umlaufenden Verfahren wieder zum Einsatz gebracht wird.2. Welding device according to claim 1, characterized in that the separating film can also be made of another heat-resistant material, but in the endless State is brought back into use in the circulating process.
DE19762623005 1976-05-22 1976-05-22 Machine for welding thermoplastic film - increases welding speed and also seam strength Withdrawn DE2623005A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762623005 DE2623005A1 (en) 1976-05-22 1976-05-22 Machine for welding thermoplastic film - increases welding speed and also seam strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762623005 DE2623005A1 (en) 1976-05-22 1976-05-22 Machine for welding thermoplastic film - increases welding speed and also seam strength

Publications (1)

Publication Number Publication Date
DE2623005A1 true DE2623005A1 (en) 1977-12-08

Family

ID=5978745

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762623005 Withdrawn DE2623005A1 (en) 1976-05-22 1976-05-22 Machine for welding thermoplastic film - increases welding speed and also seam strength

Country Status (1)

Country Link
DE (1) DE2623005A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807164A1 (en) * 1988-03-04 1989-09-14 Kiefel Hochfrequenz Paul METHOD AND DEVICE FOR PRODUCING FOLDABLE OBJECTS, LIKE BOOK COVERS, FOLDED CONTAINERS. DGL.
WO1997035708A1 (en) * 1996-03-25 1997-10-02 Schur Consumer Products A/S A method for producing ice cube bags
WO1999032840A1 (en) * 1997-12-11 1999-07-01 Unigreen International A/S Ice cube bag and a method of producing ice cube bags
EP2298538A3 (en) * 2009-09-16 2013-11-13 LEMO Maschinenbau GmbH Device and method for longitudinal welding of plastic films
US20160167290A1 (en) * 2013-07-25 2016-06-16 Packsys Global (Switzerland) Ltd. Welding device for producing tubular bodies

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807164A1 (en) * 1988-03-04 1989-09-14 Kiefel Hochfrequenz Paul METHOD AND DEVICE FOR PRODUCING FOLDABLE OBJECTS, LIKE BOOK COVERS, FOLDED CONTAINERS. DGL.
EP0387373A2 (en) * 1988-03-04 1990-09-19 Paul Kiefel Gmbh Method and apparatus for manufacturing pliable objects, such as book covers, folding containers or the like
EP0387373A3 (en) * 1988-03-04 1992-01-02 Paul Kiefel Gmbh Method and apparatus for manufacturing pliable objects, such as book covers, folding containers or the like
WO1997035708A1 (en) * 1996-03-25 1997-10-02 Schur Consumer Products A/S A method for producing ice cube bags
WO1999032840A1 (en) * 1997-12-11 1999-07-01 Unigreen International A/S Ice cube bag and a method of producing ice cube bags
EA002409B1 (en) * 1997-12-11 2002-04-25 Юнигрин Интернэшнл А/С Ice cube bag and a method of producing ice cube bags
EP2298538A3 (en) * 2009-09-16 2013-11-13 LEMO Maschinenbau GmbH Device and method for longitudinal welding of plastic films
US20160167290A1 (en) * 2013-07-25 2016-06-16 Packsys Global (Switzerland) Ltd. Welding device for producing tubular bodies
US9802356B2 (en) * 2013-07-25 2017-10-31 Packsys Global (Switzerland) Ltd. Welding device for producing tubular bodies

Similar Documents

Publication Publication Date Title
ATA925178A (en) METHOD AND DEVICE FOR WELDING METALLIC, AT LEAST ONE-SIDED, WITH A MELTING BELOW THE WELDING TEMPERATURE OR. VAPORIZING COVERED WORKPIECES
DE2623005A1 (en) Machine for welding thermoplastic film - increases welding speed and also seam strength
ATE741T1 (en) METHOD OF WELDING CAST IRON.
DE2058051A1 (en) Method and device for continuous casting
CH380364A (en) Heat sealing device
SE8304252L (en) HEAT WELDING OF THERMOPLASTIC MATERIAL
DE1704148C3 (en) Device for welding thermoplastic plastic foils
CH411320A (en) Radiators heated by pulse currents
JPS5414347A (en) Heat treating method for welded joint
DE1213597B (en) Device for welding the front edges of layers of thermoplastic material lying on top of one another
ATE32987T1 (en) METHOD AND APPARATUS FOR PRODUCING THIN METAL STRIPS FROM METAL METAL, ESPECIALLY STEEL STRIPS.
DE958104C (en) Device for removing the burr from butt-welded strip ends
DE960949C (en) Welding pad made of a ceramic material to cover the gap between two workpieces to be joined by fusion welding
DE731855C (en) Nitriding of the inner surfaces of cavities, especially holes
DE950275C (en) Process for the production of welded tubes from strip material
GB936706A (en) Improved package
ATE22412T1 (en) METHOD AND DEVICE FOR WELDING BANDS MADE OF THERMOPLASTIC MATERIAL.
DE1011541B (en) Method and device for cooling induction coils
JPS5435148A (en) Electroslag welding method
Mathe et al. Experiment Evidence for Local Concentration Variations During Precipitation in a Temperature Gradient--Case of an Fe-C Alloy
DE1303474C2 (en) DEVICE FOR WELDING AND SEPARATING PLASTIC FOILS ON TOP OF ONE another
DE102014113538A1 (en) RESISTANCE SPOT WELDING OF STEEL AND ALUMINUM WORKPIECES WITH A HOT WELD ELECTRODE TO AN ALUMINUM WORKPIECE
IKAWA et al. Weldability of nickel-base heat resisting superalloy- Main cause of weld crackings in heat affected zone of Inconel 713 C(Inconel superalloy microscopic observation of local melting and hot ductility behavior during weld thermal cycles to clarify cracking cause in heat affected zone)
US3320650A (en) Method of cutter bar manufacture
DE377771C (en) Process for preheating casting molds and their contents

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8130 Withdrawal
8162 Independent application