WO1982003199A1 - Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques - Google Patents

Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques Download PDF

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Publication number
WO1982003199A1
WO1982003199A1 PCT/DE1982/000047 DE8200047W WO8203199A1 WO 1982003199 A1 WO1982003199 A1 WO 1982003199A1 DE 8200047 W DE8200047 W DE 8200047W WO 8203199 A1 WO8203199 A1 WO 8203199A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
pressure
pump
contactor
valve
Prior art date
Application number
PCT/DE1982/000047
Other languages
German (de)
English (en)
Inventor
Armin Dommer
Dieter Dommer
Original Assignee
Armin Dommer
Dieter Dommer
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
Priority claimed from DE19813110162 external-priority patent/DE3110162C2/de
Application filed by Armin Dommer, Dieter Dommer filed Critical Armin Dommer
Priority to EP82900790A priority Critical patent/EP0073794A1/fr
Priority to PCT/DE1982/000047 priority patent/WO1982003199A1/fr
Priority to DK340582A priority patent/DK340582A/da
Publication of WO1982003199A1 publication Critical patent/WO1982003199A1/fr

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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • 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
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6653—Pressure control

Definitions

  • the invention relates to a device for butt welding plastic pipes and / or plastic fittings according to the heating element method, in which at least two clamping devices with the plastic parts defined therein can be adjusted with respect to and from one another by means of a hydraulic actuating device on a frame, the hydraulic actuating device at least one comprises double-acting hydraulic cylinders, the control lines of which can be switched by means of a manually operated change-over valve for reversing the direction, in which the tensioning devices and thus the plastic parts are available in a pressing position under a predeterminable pressing pressure and in which the hydraulic actuating device is fed by a pump driven by an electric motor, which can be switched on in every working position of the changeover valve provided with a starting position for the duration of the working position.
  • Such a device is known for example from DE-AS 27 34 910.
  • the adjustment direction of the adjusting devices is selected with the manually operated Ita switching valve, which is easiest to do with an adjusting lever. Difficulties arise in such a device, the pressure build-up to the desired pressure, which complicates the fact that depending on the plastic parts used a certain pressure assembly time and a very specific pressure must be observed.
  • the wall thicknesses of the plastic parts to be welded together and the sizes of the surfaces to be welded together play a role.
  • This object is achieved according to the invention in that the changeover valve in the switched-off position connects at least the pressure line of the pump with the control line leading to the working cylinder of the hydraulic cylinder, and that a pressure accumulator and a manometer with an adjustable switching contact adjustable to the desired pressing pressure are continuously connected to the pressure line are, and that the electric motor of the pump can be switched on by means of an additional key switch and can be switched off again when the predetermined pressing pressure is reached.
  • This configuration of the starting position of the switchover valve enables a second control option for the hydraulic actuating device.
  • only the setting of the clamping devices in the pressing position can be carried out via this control circuit, the desired pressing pressure being able to be specified via the manometer with the switching contact.
  • This adjustment is initiated in the press position by pressing the push button. Once the pressing position has been reached, the pressure accumulator picks up the hydraulic medium that is still being pumped until the pressing pressure is reached.
  • the time course of the pressure build-up can be specified solely by dimensioning the capacity of the pressure vessel.
  • Another field of application for a wide variety of welding processes can be achieved in that a pump with a high delivery rate per unit of time is used and that the pressure accumulator has a capacity that corresponds to the delivery rate of the pump, which in the maximum pressure build-up time required to build up the maximum press pressure is promoted.
  • a time-pressure ratio which differs only slightly in the most varied of applications, as will be shown. So that the pressure accumulator is not already filled in the -pressing position when the actuating devices are adjusted, according to a further development it is provided that the pressure accumulator is biased to an initial counterpressure which is equal to or greater than the pressure required for adjusting the tensioning device.
  • the working pressure generated by the pump is somewhat greater than the maximum pressing pressure.
  • the automatic switch-off of the pump when the predetermined pressing pressure is reached can be achieved with an arrangement which is characterized in that the electric motor of the pump can be switched on via a normally open contact of a contactor, that the contactor can be switched on via a normally open contact of the push-button switch and excited via its own holding work contact is held, with the manometer switch contact designed as a normally closed contact being looped into the holding current circuit * s of the contactor, that the manometer switch contact interrupts the holding circuit for the contactor when the specified contact pressure is reached, and that the supply voltage for the contactor and the electric motor of the pump is connected via an in the switched-off position of the changeover valve, closed valve contact is supplied.
  • valve contact is designed as a switching contact, which switches over to the working position of the switching valve associated with the forward and backward adjustment of the tensioning devices and directly switches on the electric motor of the pump.
  • the pump is switched off after further education, but automatically switched on again when the baling pressure drops, if the arrangement is designed so that the electric motor of the pump can be switched on via a normally open contact of an auxiliary contactor that the auxiliary contactor Via a normally open contact of a main contactor and a manometer switch contact designed as a normally closed contact, the main contactor can be switched on via a normally open contact of the push button switch and excited via its own holding work contact that the manometer switch contact contacts the circuit for the Hi when the predetermined pressing pressure is reached lfsroad interrupts and switches off the electric motor of the pump, closes the circuit for the auxiliary contactor again when the pressure drops and switches the electric motor of the pump on again so that the supply voltage for the electric motor of the pump, the auxiliary contactor and the Main contactor is supplied via a closed valve contact in the switch-off position of the switching valve, and that when the switch valve is set to a working position, the valve contact switches off the main contactor.
  • valve contact is configured as a switchover contact that is assigned to the work position assigned to the forward and reverse positions of the tensioning devices Lungs of the changeover valve and switches on the electric motor of the pimp or the auxiliary contactor directly.
  • a timer circuit can be controlled which, for a predeterminable time, controls the hydrau directly lis chen Actuator is prevented by the valve contact of the changeover valve.
  • 1 is a diagram of the time-pressure curve when the pressing pressure is built up in the pressing position, in which the plasticized connecting surfaces of the plastic parts to be connected abut one another,
  • Fig. 3 shows the circuit diagram of an embodiment of the electrical control arrangement for the device according to the invention.
  • Fig. 4 shows the circuit diagram of another embodiment of the electrical control arrangement.
  • the max ima l required pressing pressure Pmax is taken into account and a pump HP is selected which can generate a higher pressure, as can be seen from the block diagram according to FIG. 2.
  • a pump HP with a large delivery rate is used in the unit of time (1 / min), so that the adjusting movements of the clamping devices, in which the each other. plastic parts to be connected are clamped, as quickly as possible they can be brought into the pressing position and returned to their starting position.
  • hydraulic ikzyInder HZ can be acted on on both sides, so that actuating movements can be transmitted in two opposite directions via the piston K and the piston rod KS.
  • the adjustment is initiated when the z. B. actuated by an actuating lever lever Umschalteventi UV from the starting position AS in one or the other working position VS or RS is brought.
  • the control lines of the hydraulic ikzyl in the HZ are switched over in a known manner, so that on the one hand the working chamber AK and on the other hand the reset chamber RK is connected to the pressure line DL of the pump HP and the adjustment takes place in one direction or the other.
  • the pressure line DL of the pump HP in the starting position AS of the ito switching valve UV is connected to the control line to the working chamber AK of the hydraulic cylinder HZ.
  • a pressure accumulator DSp and a manometer MA with a switching contact mk that can be set to a desired pressing pressure are continuously connected to the pressure line DL.
  • the pressure accumulator DSp is now dimensioned in such a way that it can hold the quantity required by the pump HP for the maximum rise time Tmax. For example, if the pump HP has a delivery rate of 1.2 1 / min and Tmax ⁇ 20 see. then the pressure accumulator DSp must have a capacity of ⁇ sf 0.4 1.
  • the pressure accumulator DSp is preloaded with a pressure Pv that is greater than the pressure required to adjust the tensioning devices. This ensures that the rise time T associated with the characteristic of FIG. 1 is maintained solely by specifying a desired pressing pressure P. This considerably simplifies the work with the device, since now only the desired pressing pressure has to be set with the switching contact mk of the pressure gauge MA.
  • the hydraulic circuit regulates the associated time increase automatically.
  • Fig. 3 shows an embodiment of an arrangement for this semi-automatic control of the hydraulic circuit.
  • the supply Voltage for the arrangement is supplied via a break contact of the valve contact vk.
  • This valve contact vk which is designed as a changeover contact, is unsheathed in every working position of the changeover valve UV and switches on the electric motor M of the pump HP directly. So the manual control remains as before.
  • the semi-automatic control is initiated via the TS push button.
  • the response circuit of the contactor S1 is briefly closed.
  • the contactor S1 responds and closes a holding circuit via its own holding contact s 11.
  • the switching contact mk of the pressure gauge MA which is designed as a normally closed contact, is looped into this holding circuit.
  • the electric motor M of the pump HP is switched on via the make contact s 12 of the contactor S1. It does not matter how the position of the tensioning devices is.
  • the working chamber AK of the hydraulic cylinder HZ is acted upon via the pressure line DL of the pump HP via the switch-off position AS of the switchover valve UV.
  • the pressure builds up to the set press pressure in accordance with the specified time-pressure characteristic in FIG. 1.
  • the switch contact mk of the manometer MA opens and interrupts the holding circuit of the contactor S1.
  • the contactor S1 drops out and switches off the electric motor M of the pump HP with its contact s12. It is easy to see that a three-phase electric motor can be switched on and off with three contacts of the contactor S1.
  • the normally open contact s21 of the auxiliary contactor S2 switches on the electric motor M of the pump HP.
  • the auxiliary contactor S2 is switched off via the switch contact mk of the manometer MA when the specified pressure has been reached.
  • the electric motor M is switched off via the contact s21. Since the main contactor S1 remains energized and the contact s12 is closed, the auxiliary contactor S2 can be energized again when the switching contact mk of the pressure gauge MA closes again when the pressure drops below the predetermined value.
  • the auxiliary contactor S2 switches the electric motor M sol on again with the contact s21 until the predetermined pressing pressure is reached again and the switching contact mk of the pressure gauge MA opens.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques. Avec ce procede il importe d'amener les parties en matiere synthetique, apres la plastification des surfaces de liaison, dans une position de pressage ou l'augmentation de la pression jusqu'a la valeur de pressage doit suivre une courbe temps-pression donnee afin d'obtenir un joint soude irreprochable. Selon l'invention ceci est obtenu par le fait que la soupape d'inversion relie, dans sa position ouverte (AS), au moins la conduite sous pression (DE) de la pompe (HP) avec la conduite de commande debouchant dans la chambre de travail (AK) du cylindre hydraulique, qu'a la conduite sous pression sont connectes en permanence un accumulateur (DSp) et un manometre (MA) avec un contacteur d'interruption (mk) ajustable a la valeur de pression desiree, et que le moteur electrique (M) de la pompe peut etre mis en circuit a l'aide d'un bouton poussoir additionnel (TS) et a nouveau hors circuit lorsque la pression atteint la valeur predeterminee.
PCT/DE1982/000047 1981-03-16 1982-03-06 Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques WO1982003199A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP82900790A EP0073794A1 (fr) 1981-03-16 1982-03-06 Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique
PCT/DE1982/000047 WO1982003199A1 (fr) 1981-03-16 1982-03-06 Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques
DK340582A DK340582A (da) 1981-03-16 1982-07-30 Apparat under anvendelse af varmeelementfremgangsmaaden bestemt til stumpsvejsning af roer og/eller formdele af formstofmateriale

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19813110162 DE3110162C2 (de) 1981-03-16 1981-03-16 Hydraulischer Steuerkreis zum Steuern einer Vorrichtung zum Stumpfschweißen von Kunststoff-Rohren und/oder Kunststoff-Formstücken nach dem Heizelementverfahren
DE3110162810316 1981-03-16
PCT/DE1982/000047 WO1982003199A1 (fr) 1981-03-16 1982-03-06 Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques

Publications (1)

Publication Number Publication Date
WO1982003199A1 true WO1982003199A1 (fr) 1982-09-30

Family

ID=25791868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1982/000047 WO1982003199A1 (fr) 1981-03-16 1982-03-06 Dispositif pour la soudure bout a bout de tuyaux et/ou pieces en matiere synthetique selon le procede de soudage aux elements thermiques

Country Status (3)

Country Link
EP (1) EP0073794A1 (fr)
DK (1) DK340582A (fr)
WO (1) WO1982003199A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640732A (en) * 1985-03-25 1987-02-03 British Gas Corporation Apparatus for fusion joining of thermoplastic pipes

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE378148C (de) * 1919-05-31 1923-07-07 Joseph B Murray Elektrischer Widerstandsschweissapparat
DE703414C (de) * 1937-11-09 1941-03-08 Siemens Schuckertwerke Akt Ges Voll- oder halbautomatische elektrische Widerstandsabschmelzschweissmaschine, bei welcher der Schlitten ueber Kurvenscheiben mit dem Stauchmotor gekuppelt ist
GB536439A (en) * 1938-12-31 1941-05-14 British Thomson Houston Co Ltd Improvements in and relating to electric welding machines
GB784645A (en) * 1955-03-25 1957-10-16 Ckd Ceska Lipa A hydraulic press
DE970319C (de) * 1938-04-09 1958-09-04 Siemens Ag Schaltvorrichtung fuer eine selbsttaetige Abbrennschweissmaschine mit Messorgan fuerUEberwachung des Stauchdruckes
GB1202673A (en) * 1968-04-05 1970-08-19 Alfred Fischbach Hydraulic supply systems
DE2057871B2 (de) * 1970-11-25 1972-06-08 Emmerich Michael Einrichtung zum verschweissen von kunststoffprofilen
US4008118A (en) * 1975-12-30 1977-02-15 Emerson Electric Co. Butt fusion machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE378148C (de) * 1919-05-31 1923-07-07 Joseph B Murray Elektrischer Widerstandsschweissapparat
DE703414C (de) * 1937-11-09 1941-03-08 Siemens Schuckertwerke Akt Ges Voll- oder halbautomatische elektrische Widerstandsabschmelzschweissmaschine, bei welcher der Schlitten ueber Kurvenscheiben mit dem Stauchmotor gekuppelt ist
DE970319C (de) * 1938-04-09 1958-09-04 Siemens Ag Schaltvorrichtung fuer eine selbsttaetige Abbrennschweissmaschine mit Messorgan fuerUEberwachung des Stauchdruckes
GB536439A (en) * 1938-12-31 1941-05-14 British Thomson Houston Co Ltd Improvements in and relating to electric welding machines
GB784645A (en) * 1955-03-25 1957-10-16 Ckd Ceska Lipa A hydraulic press
GB1202673A (en) * 1968-04-05 1970-08-19 Alfred Fischbach Hydraulic supply systems
DE2057871B2 (de) * 1970-11-25 1972-06-08 Emmerich Michael Einrichtung zum verschweissen von kunststoffprofilen
US4008118A (en) * 1975-12-30 1977-02-15 Emerson Electric Co. Butt fusion machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640732A (en) * 1985-03-25 1987-02-03 British Gas Corporation Apparatus for fusion joining of thermoplastic pipes

Also Published As

Publication number Publication date
DK340582A (da) 1982-09-30
EP0073794A1 (fr) 1983-03-16

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