WO1997028951A1 - Procede de realisation de cordons de soudure sur des pieces en plastique, en particulier procede de soudure de tuyaux, systeme de tuyaux raccordes selon ce procede, et utilisation d'un generateur hf pour la mise en oeuvre dudit procede - Google Patents

Procede de realisation de cordons de soudure sur des pieces en plastique, en particulier procede de soudure de tuyaux, systeme de tuyaux raccordes selon ce procede, et utilisation d'un generateur hf pour la mise en oeuvre dudit procede Download PDF

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Publication number
WO1997028951A1
WO1997028951A1 PCT/AT1997/000023 AT9700023W WO9728951A1 WO 1997028951 A1 WO1997028951 A1 WO 1997028951A1 AT 9700023 W AT9700023 W AT 9700023W WO 9728951 A1 WO9728951 A1 WO 9728951A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
welding
profile body
plastic
sleeve
Prior art date
Application number
PCT/AT1997/000023
Other languages
German (de)
English (en)
Inventor
Heinz Stampfer
Original Assignee
Heinz Stampfer
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 Heinz Stampfer filed Critical Heinz Stampfer
Publication of WO1997028951A1 publication Critical patent/WO1997028951A1/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
    • 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
    • B29C65/32—Induction
    • 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
    • B29C65/242—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 the heat transfer being achieved by contact, i.e. a heated tool being brought into contact with the welding tool and afterwards withdrawn from it
    • 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
    • B29C66/003—Protecting areas of the parts to be joined from overheating
    • 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
    • B29C66/01—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/01—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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/324—Avoiding burr formation
    • B29C66/3242—Avoiding burr formation on the inside of a tubular or hollow article
    • 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
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • 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
    • B29C66/50—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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/634—Internally supporting the article during joining using an inflatable core
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • 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
    • B29C66/65—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 with a relative motion between the article and the welding tool
    • 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
    • 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
    • B29C66/81815—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 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
    • B29C66/40—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
    • B29C66/70—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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/8126—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 intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
    • 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
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • 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

Definitions

  • the invention relates to a process for producing weld seams on plastic parts, in particular pipe welding processes, in which the supply of the thermal energy for heating the welding zone takes place at least mainly from a heated metal body.
  • the invention further relates to a piping system with pipe connections produced by this process, and the use of an HF Generator to perform this procedure.
  • Pipe welding processes that work according to this principle are e.g. B. electric socket welding process in which the heated metal body consists of an electrically heated heating coil and how z. B. are known from EP 0689931 A2. The cost of materials in these processes is relatively high.
  • the invention is based on the object of specifying a method of the type mentioned which can be used in general and not only for pipe welding and which is less complex in terms of pipe welding than an electric socket welding method.
  • the welding period can be shortened not insignificantly by accelerated cooling of the welding zone.
  • the method according to the invention is first characterized in that the edges or ends of the parts to be welded, which may be held in abutment, are bridged by a holding profile body which bears on both sides of the weld seam on surface edge regions of these parts, that the metal body to be heated is inductively heated while he is in thermal conduction with said surface edge areas either directly or via the holding profile body, the two outer edges of the holding profile body, which are in thermal conduction contact with the surface edge areas, being kept at temperatures which are lower than the softening temperature of the plastic.
  • the holding profile body is designed as a coupling sleeve which bears on the outer or inner surfaces of the pipe ends to be welded to one another.
  • a pipe welding process in which the pipe parts are connected by welding and in which the heat is supplied by heating in an HF field is known, for example, from DPS 802282. In this process, two pipe ends which are inserted into one another are welded to one another. For example, metal foils are arranged in which currents are induced in the HF field, which lead to the heating of the welding zone. This method, which does not lead to a homogeneous welding zone, has not been used in practice
  • said outer edges of the holding profile body are cooled by cooling profile sections or cooling bodies which absorb excess amounts of heat
  • the coupling sleeves used consist, at least at their end areas, of a material with low thermal conductivity, preferably plastic
  • a support device advantageously a support sleeve, is provided on the side opposite the coupling sleeve with respect to the pipe ends, and is advantageously in contact with the inner or outer pipe end surfaces
  • the inserted coupling sleeve is designed to be divisible and is removed for reuse after the welding process
  • a profile body made of the welding plastic is arranged at the location of the weld between the holding profile body and the surface edge regions of the parts to be welded to one another, which connects to the parts to be welded during the welding process.
  • This profile body is a socket in pipe connections educated
  • a gap existing between the bodies to be welded is sealed by a sealing material, in particular by a sealing profile body, during the welding process
  • FIGS. 1 and 2 show the arrangement for welding two pipes together in the longitudinal or cross-section, along the lines II-II or II
  • the outer and inner diameters of the pipe ends 1, 1 ' are calibrated to the specified diameter by mechanical processing.
  • the coupling sleeve 2 used is part of the welding device. It consists of two half-shells 3, 3' of a cast part made of aluminum or another non-ferromagnetic metal are held together along the parting line indicated by 4 and as an overall sleeve have an essentially rotationally symmetrical shape.
  • the coupling sleeve 2 has a thickening 5 in the middle, at the welding point, to which two tubular sections 6, 6 'with a lesser amount on both sides Wall strong connect which of their at the ends merge into two cooling heads 7,7 '.
  • the two half-shells 3,3' are closed in a precisely defined position by two pins 8,8 'and two annular springs 9,9' in ring grooves of the cooling heads 7,7 ' held to each other
  • the half-shells of an overall tubular heating sleeve 10 made of steel are screwed onto the two half-shells of the thickening 5
  • the coupling sleeve 2 is pushed over the two pipe ends 1, 1 '.
  • a pipe sleeve 11, which lies against the inner surfaces of the pipe ends and bridges them, is arranged within the pipe ends 1, 1' and, in the given example, is made of a high-melting point casting Plastic consists.
  • the pipe ends 1, 1 ' are then pressed against one another by means of a device, not shown in the figures, in the direction of the arrows 12, 12'
  • the heating unit used in the method consists of the oscillator part 13 of an HF generator, to the electrical output of which a water-cooled inductor bent from copper pipes is connected.
  • the inductor has a protective housing 14 made of a fiber-reinforced thermoset, which is provided with positioning slots 15 and consists of two longitudinally parallel planes, spirally wound plate inductors 16
  • the heating unit is now positioned over the coupling sleeve 2 such that the planes of the plate inductors 16 and the parting plane 4 of the coupling sleeve halves are parallel to one another.
  • guide edges 17 are provided on the cooling heads 7, 7 ', along which the Protective housing 14 is pushed on
  • the HF generator which works with a frequency in the range of 75 - 175 kHz, for example, is now switched on. 10 currents are mainly induced in the halves of the heating sleeve, which within a few seconds heat them up to temperatures that are around 100 - 200 ° C higher than the melting temperature of the tubular plastic During the heating period, ie when the HF generator is switched on, heat flows continuously from the heating sleeve halves into the coupling sleeve 2 and thereby largely penetrates into the two pipe ends 1, 1 '. Another part flows out within the coupling sleeve 2 in the direction of the two cooling heads 7, 7 '. The volume and shape of the two cooling heads 7, 7 'are selected so that they remain below the softening temperature of the tube material during the heating period.
  • the heating unit can be removed immediately.
  • the tube material has melted in a volume region, the inner boundary of which is indicated by the dashed line 18.
  • rapid temperature compensation takes place via the mass of the coupling sleeve 2, the compensation temperature also remaining below the softening temperature of the pipe material because of the predominant heat storage capacity of the cooling heads 7, 7 '.
  • the coupling sleeve 2 now serves to cool the melted pipe material and thus causes the welding zone to cool down more quickly.
  • the coupling sleeve 2 is then removed from the welding zone. The welding is so perfect that the original joint between the pipe ends 1, 1 'can no longer be seen.
  • a bellows attached to the pipe system at the location of the weld and held at an excess pressure of 1-3 bar can also serve as a support device, which relieves the pressure after the welding process and leaves the pipe system is pulled out.
  • a bellows is known from EP 0689931 A2.
  • FIG. 3 shows a partial view in longitudinal section of the two pipe ends 1, 1 'between which a sleeve 19 made of tubular plastic is arranged, against the annular rib 20 of which the pipe ends 1, 1' are pushed.
  • a sealing ring 21 made of silicone rubber is also provided within the rib 20.
  • the heating sleeve 10 made of structural steel which had a weight of 28 g, was operated at a frequency of 162 kHz for 20 s heated to 300 ° C with an inductor power of 900 W.
  • the wall thickness of sections 6.6 'of coupling sleeve 2 was 0.5 mm, the cooling heads 7.7' made of aluminum had a total weight of 165 g
  • the method according to the invention can now be used not only for tube welding, but very generally for producing weld seams for connecting, for example, plate-shaped plastic parts.
  • Such a variant of the method will now be explained with reference to FIGS. 4 and 5, which are shown in cross-section or in a longitudinal section along the lines V and IV show a corresponding arrangement
  • Two plates 24, 24 ' are to be welded together at the point 25.
  • a holding profile body covering the edges of the plates 24, 24' to be welded is attached, which consists of an aluminum foil 26 and the actual support profile body 27 is the support profile body 27 is an aluminum profile body with a thickening 28 in the middle, to which two thin-walled sections 29 connect, which merge into two cooling profile sections 30.
  • the support profile body 27 is divided transversely to its longitudinal extension by slots 31 which a heat flow in Interfering with the direction of the longitudinal extension of the profile.
  • Radiators 32 in the form of steel plates are each fastened to the sections of the thickening 28
  • An oscillator part 34 of an HF generator which is provided with an inductor 33, is used to heat the radiators.
  • the inductor 33 which has a structure similar to that described with reference to FIG. 1, is arranged above the radiator 32.
  • the HF generator is switched on for the heating process and the Oscillator part 34 with the inductor 33 moves along the holding profile body 27 in the direction of arrow 35.
  • the heat generated in the radiators 32 flows, analogously to the tube welding methods described above, to a large extent into the welding region and melts the plastic there in one the dashed line 36 delimited region to the heating period is ended after the inductor 33 has moved on for each specific location of the weld seam.
  • the remaining portions of the holding profile body 27 then bring about an accelerated cooling of the welding zone suitable diameter
  • the holding profile body is bent into a tire and stretched over the location of the weld seam to be formed.
  • the inductor can here stationary and the two pipes to be welded together are rotated relative to the inductor
  • One of the functions of the coupling sleeve or the holding profile body is to form a fixed spatial limitation for the material and also to keep the two pipe ends axially aligned in pipe welding processes.Therefore, it is an important prerequisite for the functioning of the process that the ends of the coupling sleeve or the outer edges of the holding profile body are kept at temperatures which are below the softening temperature of the welding plastic. In the process variants described above, this is achieved by the cooling heads or cooling profile sections
  • a coupling sleeve is used in pipe welding processes, which consists at least in its end regions of a material of low thermal conductivity
  • FIG. 6 shows such a coupling sleeve 37 in longitudinal section. It consists of a plastic molded casting, for example of glass fiber reinforced PBT (polybutylene terephthalate), in which a heat concentrating lining 38 in the form of an aluminum bushing is integrated Outer surfaces of the pipe ends 1, 1 'A heating sleeve 39 consisting of two half-shells made of steel is fastened to the concentrating chuck outer surface. The cooling bodies are unnecessary in this variant. This coupling sleeve remains permanently on the welding point after removal of the heating sleeve 39
  • PBT polybutylene terephthalate
  • FIG. 7 now shows, also in longitudinal section, a coupling sleeve 40, which now, however, rests with its outer surface on the inner surfaces of the pipe ends 11 '. It also consists of a plastic injection-molded part, but in which, in addition to a sleeve-shaped concentric lining 38', is made of aluminum Steel ring is cast in as a heating sleeve 41.
  • An external support sleeve made of plastic not shown in FIG. 7, can advantageously consist of two interconnected half-shells, which can be removed and reused after the welding process.This process variant requires particularly little energy.A loss of energy due to radiation from the hot ones There are no metal parts in the air here

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

Abstract

L'invention concerne un procédé permettant de réaliser des joints de soudure pour raccorder des pièces en plastique, selon lequel les bords ou les extrémités de ces pièces en plastique, éventuellement maintenues bout à bout, sont montées par un corps profilé de maintien qui repose sur les deux côtés du cordon de soudure, sur les zones superficielles des bords des pièces en plastiques. Au moins un corps métallique chauffé par induction et relié avec lesdites des bords, les bords extérieurs du corps de maintien étant maintenus à des températures inférieures à la température de ramollissement du plastique. Pour le raccordement de tuyau, c'est-à-dire pour la réalisation d'un cordon de soudure fermé, le corps profilé de maintien se présente sous la forme d'un manchon d'accouplement (2, 2', 37, 40) qui est appliqué aux surface extérieures ou intérieures des extrémités de tuyaux (1, 1') qui doivent être soudées.
PCT/AT1997/000023 1996-02-09 1997-02-10 Procede de realisation de cordons de soudure sur des pieces en plastique, en particulier procede de soudure de tuyaux, systeme de tuyaux raccordes selon ce procede, et utilisation d'un generateur hf pour la mise en oeuvre dudit procede WO1997028951A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ATA234/96 1996-02-09
AT23496 1996-02-09
AT135396 1996-07-29
ATA1353/96 1996-07-29
AT7697 1997-01-20
ATA76/97 1997-01-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174248A2 (fr) * 2000-07-20 2002-01-23 Georg Fischer Rohrleitungssysteme AG Dispositif de soudage à élément chauffant
WO2013115678A1 (fr) * 2012-01-31 2013-08-08 Общество С Ограниченной Ответственностью "Альтерпласт" Procédé et unité de connexion de tube avec un élément de raccord

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DE1058243B (de) * 1956-04-17 1959-05-27 Basf Ag Verfahren und Anordnungen zum Schweissen von Kunststoffen
FR1299796A (fr) * 1961-07-20 1962-07-27 Matière plastique de soudage et dispositif destiné à l'utiliser
FR1553385A (fr) * 1967-02-08 1969-01-10
DE1479530A1 (de) * 1964-11-30 1969-05-14 Paul Nataf Verfahren und Vorrichtung zum Siegeln oder Schweissen eines aus Kunstharz bestehenden Rohres
FR2252913A1 (en) * 1973-11-29 1975-06-27 Flax V Process for annular welding of thermoplastic components - using an intermediate metal cap to transfer heat
FR2412401A1 (fr) * 1977-11-02 1979-07-20 Kommunarsk Gorno Metallurg Appareil de vulcanisation pour la reparation des articles en caoutchouc et notamment des cables electriques
EP0249590A1 (fr) * 1986-05-26 1987-12-16 Andor Bilas Elément constructif protégé contre la morsure des rongeurs, procédé de fabrication et manchon ou anneau de raccordement à utiliser en combinaison avec l'élément constructif protégé contre les rongeurs
DE3631082A1 (de) * 1986-09-12 1988-03-24 Ant Nachrichtentech Verfahren zum verbinden von formteilen sowie vorrichtung
JPS63158226A (ja) * 1986-12-22 1988-07-01 Ootsubo:Kk 合成樹脂製パイプの接続方法
EP0284834A2 (fr) * 1987-04-03 1988-10-05 Georg Fischer Aktiengesellschaft Dispositif et procédé pour le soudage d'éléments tubulaires en matière plastique
WO1990000112A2 (fr) * 1988-07-04 1990-01-11 Georg Fischer Ag Agencement de soudage d'elements tubulaires en plastique
EP0355579A2 (fr) * 1988-08-16 1990-02-28 Georg Fischer Aktiengesellschaft Procédé et appareil pour le soudage d'éléments tubulaires en matière thermoplastique
DE3919165A1 (de) * 1989-06-12 1990-12-13 Heinz Schirmacher Gmbh Verfahren zum impulserhitzen eines werkzeugs zum bearbeiten von kunststoff und werkzeug zur durchfuehrung dieses verfahrens
WO1991009247A1 (fr) * 1989-12-15 1991-06-27 Metcal, Inc. Systeme de raccord par fusion de tuyaux et procede s'y rapportant
CH683954A5 (de) * 1993-04-17 1994-06-15 Industrieorientierte Forsch Verfahren und Vorrichtung zur Herstellung von HF-Siegelverbindungen mittels eines wiederverwendbaren Wirbelstromschichtträgers.
EP0645234A1 (fr) * 1993-09-24 1995-03-29 Hidec Co., Ltd. Procédé et appareil pour la connection de tubes en matière plastique
US5484506A (en) * 1994-05-16 1996-01-16 Sani-Tech Incorporated Smooth bore welding of thermoplastic tubing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058243B (de) * 1956-04-17 1959-05-27 Basf Ag Verfahren und Anordnungen zum Schweissen von Kunststoffen
FR1299796A (fr) * 1961-07-20 1962-07-27 Matière plastique de soudage et dispositif destiné à l'utiliser
DE1479530A1 (de) * 1964-11-30 1969-05-14 Paul Nataf Verfahren und Vorrichtung zum Siegeln oder Schweissen eines aus Kunstharz bestehenden Rohres
FR1553385A (fr) * 1967-02-08 1969-01-10
FR2252913A1 (en) * 1973-11-29 1975-06-27 Flax V Process for annular welding of thermoplastic components - using an intermediate metal cap to transfer heat
FR2412401A1 (fr) * 1977-11-02 1979-07-20 Kommunarsk Gorno Metallurg Appareil de vulcanisation pour la reparation des articles en caoutchouc et notamment des cables electriques
EP0249590A1 (fr) * 1986-05-26 1987-12-16 Andor Bilas Elément constructif protégé contre la morsure des rongeurs, procédé de fabrication et manchon ou anneau de raccordement à utiliser en combinaison avec l'élément constructif protégé contre les rongeurs
DE3631082A1 (de) * 1986-09-12 1988-03-24 Ant Nachrichtentech Verfahren zum verbinden von formteilen sowie vorrichtung
JPS63158226A (ja) * 1986-12-22 1988-07-01 Ootsubo:Kk 合成樹脂製パイプの接続方法
EP0284834A2 (fr) * 1987-04-03 1988-10-05 Georg Fischer Aktiengesellschaft Dispositif et procédé pour le soudage d'éléments tubulaires en matière plastique
WO1990000112A2 (fr) * 1988-07-04 1990-01-11 Georg Fischer Ag Agencement de soudage d'elements tubulaires en plastique
EP0355579A2 (fr) * 1988-08-16 1990-02-28 Georg Fischer Aktiengesellschaft Procédé et appareil pour le soudage d'éléments tubulaires en matière thermoplastique
DE3919165A1 (de) * 1989-06-12 1990-12-13 Heinz Schirmacher Gmbh Verfahren zum impulserhitzen eines werkzeugs zum bearbeiten von kunststoff und werkzeug zur durchfuehrung dieses verfahrens
WO1991009247A1 (fr) * 1989-12-15 1991-06-27 Metcal, Inc. Systeme de raccord par fusion de tuyaux et procede s'y rapportant
CH683954A5 (de) * 1993-04-17 1994-06-15 Industrieorientierte Forsch Verfahren und Vorrichtung zur Herstellung von HF-Siegelverbindungen mittels eines wiederverwendbaren Wirbelstromschichtträgers.
EP0645234A1 (fr) * 1993-09-24 1995-03-29 Hidec Co., Ltd. Procédé et appareil pour la connection de tubes en matière plastique
US5484506A (en) * 1994-05-16 1996-01-16 Sani-Tech Incorporated Smooth bore welding of thermoplastic tubing

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PATENT ABSTRACTS OF JAPAN vol. 012, no. 424 (M - 761) 10 November 1988 (1988-11-10) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174248A2 (fr) * 2000-07-20 2002-01-23 Georg Fischer Rohrleitungssysteme AG Dispositif de soudage à élément chauffant
EP1174248A3 (fr) * 2000-07-20 2002-04-10 Georg Fischer Rohrleitungssysteme AG Dispositif de soudage à élément chauffant
WO2013115678A1 (fr) * 2012-01-31 2013-08-08 Общество С Ограниченной Ответственностью "Альтерпласт" Procédé et unité de connexion de tube avec un élément de raccord

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