WO2013129474A1 - Dispositif de soudage - Google Patents

Dispositif de soudage Download PDF

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Publication number
WO2013129474A1
WO2013129474A1 PCT/JP2013/055123 JP2013055123W WO2013129474A1 WO 2013129474 A1 WO2013129474 A1 WO 2013129474A1 JP 2013055123 W JP2013055123 W JP 2013055123W WO 2013129474 A1 WO2013129474 A1 WO 2013129474A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
clamper
heater
welding
clampers
Prior art date
Application number
PCT/JP2013/055123
Other languages
English (en)
Japanese (ja)
Inventor
歩 織田
義治 松井
正孝 三徳
Original Assignee
株式会社フロウエル
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 株式会社フロウエル filed Critical 株式会社フロウエル
Priority to KR1020147027085A priority Critical patent/KR20140141610A/ko
Priority to JP2014502310A priority patent/JP6101946B2/ja
Publication of WO2013129474A1 publication Critical patent/WO2013129474A1/fr

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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
    • B29C65/02—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
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/58—Heating hoses; Heating collars
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828—Other pressure application arrangements
    • B29C66/8286—Hand placed clamps

Definitions

  • the present invention relates to a welding apparatus that heats and welds the pipe end portion of a heat-weldable joint and the end portion of a heat-weldable tube from the outer peripheral side of the joint portion.
  • each apparatus is provided with a welding head for sandwiching and heating a joint portion between resin tubes to be welded from both sides.
  • This welding head has a pair of clampers for fixing the joint portion between the resin tubes, a pair of heat conducting members and a pair of heaters housed in the housing recesses of the pair of clampers.
  • the pair of clampers can swing between an open position that is open and a closed position that is closed.
  • the joint portion between the resin tubes is placed at a predetermined position on one clamper, It can be fixed by swinging the clamper to the closed position and sandwiching the resin tube. Thereafter, the joint can be melted and welded by heating the joint with a heater.
  • the heater is formed by a plate-like resistance heating material so as to be along the heat conducting member, and is arranged so as to heat the joint through the heat conducting member. More specifically, for example, a nichrome plate having a thickness of 0.2 mm is used as the plate-like resistance heating material, and the resistance value is as small as 0.1 ⁇ or less. Further, as the heat conducting member, for example, a member formed in a semi-cylindrical shape with a heat conductive ceramic material has been used.
  • a resistance heating material such as a nichrome plate is used as a specific configuration of the heater, and the resistance value is very small even if the heater itself can be downsized. Electric current was needed. For this reason, since a welding head capable of supplying a large current, a jig power supply, and a power cable are necessary, there is a problem that the entire apparatus is reduced in weight and compact design, and it becomes an obstacle when reducing costs. Further improvements were desired.
  • the present invention has been made by paying attention to the problems of the prior art as described above, and is based on the premise that a heater generally uses a planar heating element having a large resistance value. As a result, it is possible to reduce the weight and size of the welding head as well as the entire device, as well as the heater, increase the welding efficiency with a simple configuration, and reduce the cost significantly. It is intended to provide.
  • the gist of the present invention for achieving the object described above resides in the inventions of the following items.
  • the welding head (11) includes a plurality of clampers (20) divided in a circumferential direction that circulates around the joint (3), and a plurality of heaters provided along the inner peripheral side of each clamper (20).
  • Each clamper (20) is displaceably connected to a closed position that is closed so as to go around the joint (3) and an open position that is opened so as to be separated from the joint (3),
  • Each heater (30) covers the front and back of the sheet heating element (31) with a sheet-like insulating material (32), which is fixed to a thin metal plate (33), and the inner periphery of the clamper (20). Curved in an arc along the surface, When each clamper (20) is in the closed position, each heater (30) abuts each other at both ends (30a) adjacent to each other, and the outer periphery of the joint (3) is spaced in the circumferential direction.
  • a welding apparatus (10) characterized in that the welding apparatus is arranged so as to continuously surround it.
  • the heaters (30) are respectively supported by a frame member (35) having a curved shape along the outer periphery thereof, and the clampers (20) are supported by the frame members (35).
  • one clamper (20) is provided with an air supply inlet (24), and the other clamper (20) is provided with an air supply outlet (25). After the welding of the joint (3) is completed, air is forcibly introduced into the inside through the air feed inlet (24) and exhausted to the outside through the air feed outlet (25).
  • the welding apparatus (10) according to [1], [2] or [3], wherein (3) and each heater (30) are cooled.
  • each clamper (20) is displaced from the open position to the closed position to hold the joint (3) in a circulating state, and then each heater (30) on the inner peripheral side of each clamper (20). Each generates heat.
  • each clamper (20) and each heater (30) do not need to be a pair divided into two in the circumferential direction, and may be configured to be divided into three or four, for example.
  • Each heater (30) covers the front and back of the sheet heating element (31) with a sheet-like insulating material (32), which is fixed to a metal thin plate (33), and the inner peripheral surface of the clamper (20). It is curved in a circular arc shape along.
  • the sheet heating element (31) is not only thinner than a resistance heating material such as a conventional nichrome plate, but also has a large resistance value as one of its characteristics. Can generate heat. Therefore, the welding head (11), the jig power supply, the power cable, and the like can be simplified.
  • the sheet heating element (31) is covered with the sheet-like insulating material (32), the insulator is interposed between the heaters (30) even when the heaters (30) are close to each other. There is no need to let them.
  • the metal thin plate (33) can be kept in a curved shape in an arc along the inner peripheral surface of the clamper (20) due to its plasticity.
  • the metal thin plate (33) can not only replace the member for heat conduction, but also can increase the durability and rigidity of the heater (30) itself, and can further coat the releasable material (34). It can also be used as a surface to be processed.
  • each heater (30) abuts each other at both ends (30a) adjacent to each other, and the outer periphery of the joint (3) is continuous without any gap in the entire circumferential direction. And are arranged so as to surround them. As described above, such an arrangement can be achieved by ensuring the insulation of the heater (30) itself from the insulating material (32) and further providing durability and the like by the metal thin plate (33). With such an arrangement, the heat generation efficiency can be further increased, and the joint portion (3) can be welded uniformly and uniformly over the entire circumferential direction.
  • each heater (30) is supported by a frame member (35) having a curved shape along the outer peripheral side thereof, and the frame member ( 35) to each clamper (20) of the welding head (11).
  • the frame member (35) is suitable for processing with a metal material in terms of ease of processing and cost.
  • the support of the heater (30) with respect to the frame member (35) preferably has a point contact structure so that the contact area is as small as possible from the viewpoint of avoiding heat loss.
  • each clamper (20) that directly engages with the tube (2) is formed of an elastic material.
  • the cushioning property is ensured in the portion that directly engages the flexible tube (2), the deformation of the tube (2) can be suppressed, the coefficient of friction increases, and the displacement can be prevented. it can.
  • one of the clampers (20) is provided with the air supply inlet (24) and the other clamper (20) is supplied with air.
  • An outlet (25) is provided.
  • the welding apparatus According to the welding apparatus according to the present invention, it is assumed that a sheet heating element having a large resistance value is generally used for the heater, and by making improvements based on this, not only the heater but also the entire apparatus.
  • the weight can be reduced and the size can be reduced, the welding efficiency can be increased with a simple configuration, and the cost can be greatly reduced.
  • FIG. 1 to 10 show an embodiment of the present invention.
  • the welding apparatus 10 according to the present embodiment is heated from the outer peripheral side of the joint portion 3 in a state where the pipe end portion of the heat weldable joint 1 and the end portion of the heat weldable tube 2 are joined to each other.
  • This is a device for welding.
  • a fluororesin material is used as a heat-weldable material will be described as an example.
  • the joint 1 and the tube 2 constitute a flow conduit for a cleaning liquid such as pure water used in a clean room at a semiconductor chip manufacturing site or the like, and other general chemical liquids, for example.
  • the joint 1 is a cylindrical member, and two positioning protrusions 1a and 1b are formed in parallel on the outer periphery thereof. Each positioning protrusion 1a, 1b is positioned by fitting with a clamper 20 described later at the time of welding.
  • the tube 2 is a hollow cylindrical tube.
  • the joint portion 3 has an end portion of the tube 2 fitted to a tube end portion of the joint 1, and a housing 4 that is a heat-resistant cylinder is further fitted.
  • the housing 4 is a resin molded product having a melting point higher than that of the joint 1 and the tube 2, and prevents the shape from collapsing during welding.
  • the positioning protrusions 1 a and 1 b of the joint 1 are formed so as to be arranged in the vicinity of the joint 3.
  • the joint 1 and the tube 2 are made of a fluororesin material such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer).
  • the housing 4 is made of a fluororesin material such as polytetrafluoroethylene.
  • the welding apparatus 10 can be held in a state where it circulates the joint 3, and includes a welding head 11 for heating the joint 3 from the outer peripheral side.
  • the welding head 11 includes a plurality of clampers 20 that are divided in the circumferential direction that circulates around the joint portion 3, and a plurality of heaters 30 that are provided along the inner peripheral side of each clamper 20.
  • a plurality of clampers 20 and heaters 30 are provided in pairs in this embodiment.
  • each clamper 20 is movably connected to a closed position that is closed so as to go around the joint 3 and an open position that is opened so as to be separated from the joint 3. ing. More specifically, one end of the pair of clampers 20 is slidably connected to a closed position where the joint 3 is sandwiched from both sides and an open position where the gap is widened.
  • each clamper 20 is connected to each other by a hinge or the like so as to be swingable, and the other end is provided with a general-purpose stopper or the like that can be restrained to a closed position. Yes.
  • Each clamper 20 is formed of a metal material (for example, stainless steel) in a semicircular case shape. More specifically, the clamper 20 includes a semicircular arc-shaped front and rear side walls 21 and an outer peripheral wall 22, and an inner peripheral side thereof is open, and the inside serves as an accommodating recess 23 for accommodating the heater 30. Yes. As shown in FIG. 2, the clampers 20 are configured to communicate with each other when they are in the closed position and are sealed from the outside of the clampers 20.
  • One clamper 20 is provided with an air supply inlet 24, and the other clamper 20 is provided with an air supply outlet 25. After the welding of the joint portion 3 is completed, air is forcibly introduced into each clamper 20 from the air supply inlet 24 and exhausted to the outside from the air supply outlet 25.
  • the semicircular arc-shaped opening edge on the inner peripheral side is a portion that is directly engaged with and held by the tube 2 or the joint portion 3.
  • one opening edge is a portion that directly engages the tube 2 when each clamper 20 is in the closed position, and the portion is formed of an elastic material.
  • a mounting rail 26 having a groove-shaped cross section is provided so as to extend in a semicircular arc shape along the opening edge on the inner peripheral side, and a tube material 27 made of an elastic material is provided in the groove of the mounting rail 26.
  • a part of the outer periphery protrudes outward and is fitted into the tube 2.
  • a tube material made of silicon may be adopted as the tube material 27.
  • the other opening edge is a portion that directly engages with the joint portion 3 when each clamper 20 is in the closed position, and a joint holding portion 28 is provided in the portion.
  • the joint holding part 28 is formed as a flange protruding along the other opening edge so as to fit into a recess between the positioning protrusions 1a, 1b of the joint 1.
  • the joint 1 held by the joint holding portion 28 does not shift even if a force is applied in a direction in which the joint 1 is removed from the clamper 20, and the state of being securely held is maintained.
  • the positioning protrusions 1 a and 1 b are provided at positions adjacent to the joint portion 3.
  • the heater 30 covers the front and back surfaces of the sheet heating element 31 with a sheet-like insulating material 32, which is fixed to a thin metal plate 33, along the inner peripheral surface of the clamper 20. It is curved in a circular arc shape.
  • the planar heating element 31 is a thin film-like heating element that generates heat by flowing electricity, and its configuration is general, and thus detailed description thereof is omitted.
  • the planar heating element 31 is formed in a narrow tape shape, and is designed so as to obtain a uniform heat distribution by applying a circuit to almost the entire area.
  • a planar heating element 31 is not only very thin and soft, but also has a large resistance value as an electrical characteristic.
  • the resistance value is 0.1 ⁇ or less and the current is about several tens of A.
  • the resistance value is about several ⁇ , and the current is about several A.
  • the sheet-like insulating material 32 that covers the front and back surfaces of the sheet heating element 31 may be anything as long as it is a sheet-like material having insulating properties. Specifically, for example, what is called a flexible mica sheet is used. Is suitable. This is a moldable composite material in which mica (mica) is infiltrated into an organic silicon resin having high temperature resistance. The entire area other than the electrode portions at both ends of the planar heating element 31 is covered from the front and back by the insulating material 32. Further, this is fixed to the thin metal plate 33 and is bent in an arc shape along the inner peripheral surface of the clamper 20. In the present embodiment, the sheet heating element 31 covered with the insulating material 32 is sandwiched from the front and back by the metal thin plate 33, but is not limited to this configuration, and only along one side. The metal thin plate 33 may be fixed.
  • the metal thin plate 33 for example, a material having equivalent workability and heat resistance such as nichrome and stainless steel may be used.
  • the entire heater 30 can be bent into a desired shape by the plasticity of the metal thin plate 33. Specifically, as shown in FIG. 10, the heater 30 is bent into a semicircular arc shape. Further, both end portions 30a of the heater 30 are bent on the same plane, and are formed in a flange shape so that the pair of heaters 30 are in contact with each other. Although not shown, heater wires are connected to both end portions 30a. Each heater 30 is wired to the power supply unit via a heater wire, and heating control is possible.
  • the heater 30 is supported by a frame member 35 having a curved shape along the outer peripheral side thereof, and the housing recess 23 of the clamper 20 is interposed through the frame member 35. Is attached.
  • the pair of heaters 30 are arranged so that both end portions 30a abut each other vertically and continuously surround the outer periphery of the joint portion 3 in the circumferential direction without any gap. ing.
  • the planar heating element 31 of the heater 30 is insulated by the insulating material 32.
  • the frame member 35 has a structure for preventing the shape of the heater 30 from being deformed, in addition to maintaining the shape of the heater 30 by the metal thin plate 33.
  • the frame member 35 is a groove-shaped cross-section member obtained by processing a metal material so as to match the semicircular arc shape of the heater 30, and the inner peripheral side is open, and the heater 30 is floated along the inside of the opening. Support in shape. That is, the heater 30 is supported by the mounting piece 33a that locally protrudes so as not to contact the frame member 35 as much as possible. Thereby, a gap for cooling the heater is formed between both side edges of the heater 30 and the opening side edge of the frame member 35.
  • both end portions 35 a of the frame member 35 are formed in a flange shape like the both end portions 30 a of the heater 30.
  • the both end portions 35a are provided with attachment pieces 35b that are screwed to the fixing seat 29 on the inner wall of the accommodating recess 23 of the clamper 20.
  • the frame member 35 is not limited to a metal material, and may be formed of a resin material having a strength capable of maintaining rigidity and a high temperature resistance.
  • the attachment piece 33a may be provided not on the metal thin plate 33 side of the heater 30 but on the frame member 35 side.
  • the welding head 11 configured as described above constitutes a welding apparatus 10 in combination with a power supply unit (not shown) to which a heater wire extending from each heater 30 is connected.
  • a temperature sensor is incorporated in each clamper 20 of the welding head 11 although not shown.
  • the sheath type thermocouple in the conventional apparatus, is configured to contact the nichrome plate, but in this embodiment, the thermocouple is directly applied to the metal thin plate 33 or the frame member 35 of the heater 30. Just weld.
  • a temperature sensor can be attached because the thin metal plate 33 is insulated from the planar heating element 31 by the insulating material 32. According to the configuration of such a temperature sensor, cost reduction and accurate temperature measurement are possible.
  • the clamper 20 is made of a metal material (for example, stainless steel) instead of a conventional bake material, so that deterioration over time (distortion due to heating) can be suppressed.
  • the heater 30 is manufactured by the planar heating element 31, not only the welding head 11 is reduced in size by the structure of the heater 30 itself but also the resistance of the heater 30 is small. Welding with electric current is possible. As a result, it is possible to eliminate the large-diameter cable and connect with a thin heater wire, and it is also possible to reduce the size of the power source and the power source unit that houses the power source.
  • the welding head 11 (clamper 20) has a structure that mainly accommodates the heater 30, and the thickness in the radial direction can be suppressed as much as possible in the illustrated ring shape.
  • each clamper 20 is opened to the open position, and each The joint 3 is disposed between the clampers 20.
  • the joint holding part 28 of one clamper 20 may be disposed so as to fit into the recesses between the positioning protrusions 1 a and 1 b of the joint 1.
  • the pair of heaters 30 are arranged so that both end portions 30a abut each other vertically and continuously surround the outer periphery of the joint portion 3 without any gap in the entire circumferential direction. Is done.
  • Such an arrangement is made possible by the planar heating element 31 of the heater 30 being insulated by the insulating material 32 and having durability and the like by the metal thin plate 33. As a result, the heat generation efficiency can be increased, and the joining portion 3 can be welded uniformly and uniformly over the entire circumferential direction.
  • Each heater 30 is energized and generates heat by operating a start switch (not shown) in the power supply unit.
  • a start switch not shown
  • each heater 30 has the same shape and the same resistance, so the amount of heat generated from each heater 30 is also the same.
  • an insulator is interposed between both ends of each heater as in the conventional apparatus, and the temperature of this portion may be locally reduced. Absent. Therefore, the junction part 3 can be heated uniformly from the whole circumference direction, and the favorable welding result of the junction part 3 can be obtained.
  • each heater 30 covers the front and back of the planar heating element 31 with a sheet-like insulating material 32, which is fixed from the front and back with a metal thin plate 33, along the inner peripheral surface of the clamper 20. Curved in an arc.
  • the sheet heating element 31 is not only thinner than a resistance heating material such as a conventional nichrome plate, but also has a large resistance value as one of its characteristics, so that it can sufficiently generate heat even at a relatively low current. it can. Therefore, the welding head 11, the power supply unit, the power supply cable, and the like can be simplified.
  • the front and back surfaces of the planar heating element 31 are covered with the sheet-like insulating material 32, it is not necessary to interpose an insulator as described above even when the heaters 30 are close to each other.
  • the metal thin plate 33 by being fixed to the metal thin plate 33, it is possible to keep the shape curved in an arc along the inner peripheral surface of the clamper 20 due to the plasticity of the metal.
  • the thin metal plate 33 can be used as a substitute for the heat conducting member, and the durability and rigidity of the heater 30 itself can be increased.
  • a releasable material 34 is laminated on the surface of the metal thin plate 33 which is the inner peripheral side of each heater 30. Accordingly, it is not necessary to separately prepare a heat conducting member obtained by processing ceramic as in the prior art for mold release. In addition, for the insulating material 32 that covers the front and back surfaces of the planar heating element 31, it is difficult to laminate a releasable material by means of ceramic spraying or the like. It is possible to coat a releasable material without difficulty.
  • the releasable material 34 is laminated as in the present embodiment, heat conduction is not impaired, and heat generation from the planar heating element 31 is efficiently transmitted while ensuring releasability. be able to.
  • the lamination of the releasable material 34 is not limited to ceramic spraying.
  • each heater 30 is supported by a frame member 35 having a curved shape along the outer peripheral side thereof, and is attached to each clamper 20 via the frame member 35.
  • the curved shape of the heater 30 itself can be maintained more firmly.
  • the heater 30 is supported by the attachment piece 33a so as to float inside the opening of the frame member 35, and the frame member 35 is also attached to the clamper 20 by the both end portions 35a so that the contact area becomes as small as possible. ing.
  • a gap for cooling the heater is generated between both side edges of the heater 30 and the opening side edge of the frame member 35, and a large gap is also generated between the frame member 35 and the clamper 20.
  • the gaps serve as a heat insulating layer, making it difficult for the heat of the heater 30 to be transmitted to the clamper 20 and preventing heat loss.
  • each heater 30 is connected to a power supply unit via a heater wire, and heating control is possible.
  • a resistance element is inserted in series for each heater 30 so that each heat generation temperature is reduced. It is also possible to adjust.
  • Each clamper 20 communicates with each other when in the closed position and is sealed to the outside of each clamper 20.
  • One clamper 20 is provided with an air supply inlet 24, and the other clampers 20 is provided with an air supply outlet 25. After the welding of the joint portion 3 is completed, air is forcibly introduced into each clamper 20 from the air supply inlet 24 and exhausted to the outside from the air supply outlet 25, whereby a series of air flows.
  • the heater 30 can be quickly cooled, and the joint 3 is also cooled.
  • the tube 2 welded to the joint 1 may be a joint instead of the tube.
  • heat-weldable resin joints are welded together.
  • the plurality of clampers 20 and the heaters 30 are provided in pairs of two divided in the circumferential direction. However, it is not always necessary to align the pairs, for example, three or four in the circumferential direction. You may comprise so that it may do.
  • the welding apparatus according to the present invention can be widely applied as an apparatus for welding joints and tubes constituting flow channels for cleaning liquids such as pure water and other general chemicals used in a clean room at a semiconductor chip manufacturing site or the like. it can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

L'invention concerne un dispositif de soudage qui : permet non seulement à l'élément chauffant mais également à la tête de soudage ainsi qu'à l'ensemble du dispositif d'être rendu plus léger et plus petit ; est capable d'augmenter l'efficacité de soudage avec une configuration simple ; et est également capable de réduire les coûts de manière significative. La tête de soudage (11) qui entoure et maintient la jonction (3) d'un accouplement (1) et d'un tube (2) a de multiples pinces (20) qui peuvent être ouvertes et fermées. Les éléments chauffants (30), qui sont prévus le long de la circonférence intérieure de chaque pince (20), sont obtenus par superposition de matériaux isolants en forme de feuille (32) sur l'avant et l'arrière d'un corps de génération de chaleur en forme de feuille (31), fixant ce dernier à une plaque métallique mince (33) et le courbant en forme d'arc qui suit la surface circonférentielle intérieure de la pince (20). Lorsque les pinces respectives (20) sont dans la position fermée, les éléments chauffants (30) sont disposés de manière à entourer la circonférence extérieure de la jonction (3) en continu dans la direction circonférentielle sans espace, les deux sections d'extrémité adjacentes respectives (30a) étant en butée les unes contre les autres.
PCT/JP2013/055123 2012-02-29 2013-02-27 Dispositif de soudage WO2013129474A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020147027085A KR20140141610A (ko) 2012-02-29 2013-02-27 용착 장치
JP2014502310A JP6101946B2 (ja) 2012-02-29 2013-02-27 溶着装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012044480 2012-02-29
JP2012-044480 2012-02-29

Publications (1)

Publication Number Publication Date
WO2013129474A1 true WO2013129474A1 (fr) 2013-09-06

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PCT/JP2013/055123 WO2013129474A1 (fr) 2012-02-29 2013-02-27 Dispositif de soudage

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Country Link
JP (1) JP6101946B2 (fr)
KR (1) KR20140141610A (fr)
TW (1) TWI613063B (fr)
WO (1) WO2013129474A1 (fr)

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CN110667125A (zh) * 2019-09-25 2020-01-10 泉州市缪斯女神商贸有限公司 一种对翻边挤压粘合的聚乙烯管道热熔机
JP2020097830A (ja) * 2018-12-17 2020-06-25 和光合成樹脂株式会社 板状体の連結治具及びそれを用いた接合方法

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TWI595184B (zh) * 2014-02-17 2017-08-11 亞布羅解決方案環球公司 熱隔離夾具
CN112325004A (zh) * 2020-11-06 2021-02-05 新兴铸管股份有限公司 管道接头保温结构及其施工方法

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JPH08296785A (ja) * 1995-04-27 1996-11-12 Hitachi Metals Ltd 電気融着継手及びその製造方法
JP4109540B2 (ja) * 2002-12-20 2008-07-02 株式会社フロウエル 樹脂チューブの溶着装置

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JPH08138840A (ja) * 1994-11-10 1996-05-31 Sekisui Chem Co Ltd 合成樹脂融着用ヒータ
JPH08296785A (ja) * 1995-04-27 1996-11-12 Hitachi Metals Ltd 電気融着継手及びその製造方法
JP4109540B2 (ja) * 2002-12-20 2008-07-02 株式会社フロウエル 樹脂チューブの溶着装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020097830A (ja) * 2018-12-17 2020-06-25 和光合成樹脂株式会社 板状体の連結治具及びそれを用いた接合方法
CN110667125A (zh) * 2019-09-25 2020-01-10 泉州市缪斯女神商贸有限公司 一种对翻边挤压粘合的聚乙烯管道热熔机

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TW201406530A (zh) 2014-02-16
TWI613063B (zh) 2018-02-01
KR20140141610A (ko) 2014-12-10
JP6101946B2 (ja) 2017-03-29
JPWO2013129474A1 (ja) 2015-07-30

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