AU674336B2 - Apparatus for production of tubular bodies - Google Patents

Apparatus for production of tubular bodies Download PDF

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Publication number
AU674336B2
AU674336B2 AU47320/93A AU4732093A AU674336B2 AU 674336 B2 AU674336 B2 AU 674336B2 AU 47320/93 A AU47320/93 A AU 47320/93A AU 4732093 A AU4732093 A AU 4732093A AU 674336 B2 AU674336 B2 AU 674336B2
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AU
Australia
Prior art keywords
belt
mandrel
run
heating means
shaping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU47320/93A
Other versions
AU4732093A (en
Inventor
Hans Burger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KMK Lizence Ltd
Original Assignee
MAEGERLE KARL LIZENZ
KMK Lizence Ltd
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 MAEGERLE KARL LIZENZ, KMK Lizence Ltd filed Critical MAEGERLE KARL LIZENZ
Priority to AU47320/93A priority Critical patent/AU674336B2/en
Publication of AU4732093A publication Critical patent/AU4732093A/en
Assigned to KMK LIZENCE LTD reassignment KMK LIZENCE LTD Alteration of Name(s) of Applicant(s) under S113 Assignors: KMK KARL MAEGERLE LIZENZ AG
Application granted granted Critical
Publication of AU674336B2 publication Critical patent/AU674336B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B29C53/50—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively using internal forming surfaces, e.g. mandrels
    • 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
    • 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
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness 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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • B29C66/00441—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool movable, e.g. mounted on reels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • 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
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

'9 9 9 0 9 AUSTRAL IA Patents Act 1990 COM1PLETE SPECIFICATION STANDARD PATENT
SEC.
113 Applicant(s): Invention Title: APPARATUS FOR PRODUCTION OF TUBULAR
BODIES
The following statement is a full description of this invention, including the best method of performing it known to me/us: I
S.
9 KK-86806 /9 BACKGROUND OF THE INVENTION One form of procedure for the production of tubular bodies for packaging tubes involves producing the tubular bodies from a foil strip which includes a weldable plastic material, by virtue of the longitudinal edges of the foil strip being thermally joined together in mutually overlapping relationship. The thermal joining or seaming operation is carried out in an apparatus referred to as a longitudinal seam welding machine or side seamer, which may ccmprise a shaping belt for shaping the foil strip around a mandrel to provide the tubular body, with a lower driven transportation belt running against the mandrel and an upper driven transportation belt, with the longitudinal edges of the foil strip being received between the belts in mutually overlapping relationship. A heating means acts on the upper transportation belt to cause the overlapping longitudinal edges 15 to fuse together and the fused edges are then pressed, with prehardening of the plastic material. The pre-hardened plastic material is then finally hardened under the action of a cooling means disposed downstream of the pressing neans. The upper and lower transportation belts which thus run one above the other are generally made of metal so that the action of heat and pressure on the belts causes the material of the overlapping edges to be fused together in a fused seam before the resulting seam is then cooled to effect hardening thereof.
0oo In such an apparatus, the upper transportation belt passes 25 around sets of rollers, wherein the heat generating, pressing and cooling means are disposed between the upper and lower runs of the upper belt, being adapted to act on the lower run thereof. In the part of the apparatus in which the fusing, pressing and cooling 0 operations, that is to say the actual operation of forming the welded 30 seam, takes place, the lower transportation belt runs in the same direction as the upper belt, in the mandrel referred to above.
In that arrangement, the upper run of the lower belt is guided on a surface of the mandrel and co-operates with the low.-n un of the KK-8686,6 upper belt in the manner of a support neans while the lower run of the lower belt experiences a change in its direction of movement of the mandrel and goes back in the mandrel.
The upper run of the lower belt may be heated before it passes on to the mandrel, by means of external heating devices which apply heat to the upper run of the belt. The mandrel may also include heating inserts on which the upper run of the lower belt moves. In order to accelerate cooling of the welded seam, the mandrel may be cooled in the section which co-operates with the cooling rmans that acts on the upper transportati-n belt.
The mandrel in the above-indicated apparatus is the cause of limitations in terms of an increase in operating speed and economy of longitudinal seam welding machines or side seamers, such limitations being due to the quality requirements in respect of the 0* 15 welded seams. It is not possible to make use of tubular bodies with defective welded seams, welding which is inco plete in places on the tubular body or seams which have unwelded material squeezed out of the edge portions of the mutually overlapping longitudinal edges of the foil strip, as they could result in the packaged material being unacceptably contaminated.
In an endeavour to eliminate those and other sean defects when using high operating speeds, the heat applied to and the heat removed frcm the weld, by way of the two belts, that is to say the lower run of the upper belt and the upper run of the lower belt which thus act as welding tools, in conjunction with the effect of pressure applied to the weld, are to be kept closely matched to the nature and material of the plastic foil and the speed of movement, that is to say the operating speed of a side seamer.
In regard to the upper belt, it is substantially possible to 30 achieve good matching in relation to laminate materials by virtue of adjustability of the individual action of the heating means, pressing means and cooling means, which represent individual 2 3 elements that are structurally separate from each other, and which thus constitute sections of the arrangement which are individualised in terms of heat produced and pressure applied as well as cooling effect, over the welding section of the apparatus.
However the mandrel in the above-indicated apparatus cannot provide for a comparable matching effect, for the reason that, when the belt is heated and cooled upstream of and in the mandrel, the belt experiences a tenmperature gradient which decreases in the direction of the cooling portion, and that temperature gradient can be adjusted overall, but it cannot be adjusted in an individualised fashion for each section, in order to provide a good matching effect. That means that the above-indicated mandrel which contributes to the welding process determines to a not inconsiderable degree the operating speed and economy of side seamers as well as the quality of the welded seams produced.
SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for the production of tubular bodies, more especially for packaging tubes, from a foil strip including a weldable plastic material, which attempt to avoid at least one of the disadvantages of the above-indicated apparatus.
25 According to the present invention there is provided an apparatus for the production of a tubular body from a foil strip which includes a weldable plastic material and the longitudinal edges of which are thermally joined °together, comprising a mandrel, a shaping belt adapted to S 30 shape the foil strip around the mandrel to provide a tubular body, a Jower transportation belt, having an upper and lower belt run, which runs against the mandrel, an upper S"transportation belt having an upper and lower belt run, between the upper belt run of CeL- lower transportation belt and the lower belt run of the upper transportation belt said longitudinal edges of the foil strip are received in mutually overlapping relationship, means for driving the 4 transportation belts, a heating means adapted to act on the lower belt run of the upper transportation belt to cause said overlapping longitudinal edges to fuse, a pressing means for pressing said fused longitudinal edges, with prehardening of the plastic material, a cooling means arranged downstream of the pressing means for compl.eting hardening of the plastic material, and means for adjusting the temperature of the upper belt run of the lower transportation belt associated with the lower belt run of the upper transportation belt in individual regions at each of the heating means, pressing means and cooling means, wherein said temperature adjusting means include at least first, second, and third cavities in the longitudinal extent of the mandrel, said cavities having walls, over which cavities the upper belt run of the lower transportation belt is adapted to successively pass, with the cavities provided in respective inserts which extend along the mandrel, wherein the length and width of the cavities substantially corresponds to the length and width of the heating means, pressing means and cooling means respectively, and further including means for adjusting the temperatures of the cavities, and wherein walls of the cavities, excluding those walls facing the upper belt run of the lower transportation S belt, are provided with insulating means.
25 As will be seen in greater detail hereinafter, by virtue of the randrel being divided in accordance with the invention into successively disposed portions, the temperatures or thermal contents of which are adapted to be individually adjusted, the apparatus according to the 30 invention gives the advantage of an increase in operating speed, while providing satisfactory welded seams of high quality on tubes of material of the above-indicated kind.
SeA further advantage oZ the preferred embodiment is that the start-up time of a longitudinal seam welding machine or side seamer can be markedly reduced by virtue of temporarily increased heating of the individual portions of the mandrel. The structure in accordance with embodiments s-of the invention also KK-8686 affords the advantage of reducing the amount of waste material produced in the start-up phase of the apparatus, due to foil material not being welded or being only unsatisfactorily welded, when starting the apparatus operating.
Further objects, features and advantages of the invention will be apparent froa the following description of a preferred embodinent.
BRIEF DESCRIPTION OF TIlE DRAWINGS Figure 1 is a diagrammatic side view of an apparatus for the production of packaging tubes, Figure 2 is a view on an enlarged scale of part of the apparatus shown in Figure 1, showing the mandrel thereof in the tube-forming region of the apparatus, Figure 3 is a front view of a shaping assembly in the t",e- S" 15 forming region of the apparatus, 9* 99 S. Figure 4 is a front view in section through the mandrel taken along line X-X in Figure 2, on an enlarged scale, and Figure 5 is a view in longitudinal section of a mandrel as illustrated in Figure 2 with inserts therein.
DESCRIPTION OF THE PREFERRED EMBODIMEN Referring firstly to Figure 1, the apparatus illustrated therein for the production of tubular bodies, for example packaging 9 tubes, fron a foil strip which includes a weldable plastic material and the longitudinal edges of which are to be thermally joined 25 together, coaprises a base or mounting plate 10 and a carrier plate *9 11 whwhich is mounted on the mounting plate 10 movably in a vertical direction thereon. Reference numeral 12 identifies control nebers which are connected to the mounting plate 10 and the carrier plate 11 so that the carrier plate 11 can be vertically adjusted in its S* 30 position relative to the mounting plate 10 and fixed in the adjusted position.
At its front or upstream end which is towards th i left in Figure 1, the carrier plate 11 carries two spaced-apart rollers 13 KK-86866 6 and 14. A drive roller 15 is arranged at a spacing froa the rear or downstrea;.i end of the carrier plate 11, which is towards the right in Figure 1, on the mounting plate Passing around the rollers 13 and 14 and the drive roller 15 is an endless upper metal belt 16, referred to hereinafter as the upper transportation belt 16, providing an upper belt run 17 and a lower belt run 18. Disposed between the upper belt run 17 and the lower belt run 18 in succession as viewed in the direction of movement of the transportation belt 16 is a heating means 19, a pressing means and a cooling means 21. The lower belt run 18 passes beneath the heating means 19, pressing means 20 and cooling means 21 and they thus co-nperate with the lower belt run 18.
For the purposes of vertical adjustment, the heating means 19 and pressing means 20 are each provided with a control member 22 and 23 whereby the heating means 19 and pressing means 20 are vertically adjustable in relation to the lower belt run 18.
The heating means 19 preferably includes an inductively operative high-frequency heating arrangement which in the operating condition generates heat in the lower belt run 18 and also in the subjacent upper belt run 24 of a lower driven belt 25, hereinafter referred to as the lower transportation belt The upper transportation belt 16 and the lower transportation
C
belt 25 preferably canprise metal if heating thereof is effected inductively by means of high-frequency energy. As the metal belts 16 25 and 25 are of low mass, they can be rapidly heated up and cooled down without other parts of the apparatus also having to be heated up and cooled down therewith.
Belts 16 and 25 of metal are preferred if pure plastic foils *ee.
are involved in the welding operation. If a plastic foil includes a metal foil which, heated by induction, melts the plastic material, then the belts 16 and 25 may conprise plastic material, for example polytetrafluoroethylene.
KK-86866 The heating means 19 which serves for inductive heating essentially comprises a high-frequency coil, whose output of energy is concentrated on to the area to be heated, beneath the heating neans 19. The high-frequency coil is fed by a high-frequency generator of known design which therefore does not need to be described in detail herein.
The cooling means 21 which is disposed downstream of the pressing means 20 removes from the welded sen the excess heat thereof for setting thereof, after the seam has been subjected to a pressing effect by virtue of the pressing means 20, preferably with pre-hardening of the welded material formed by the fused overlapping longitudinal edges of the foil strip.
60. As still shown in Figure 1, the upper belt run 17 of the transportation belt 16 passes over cooling bars 26 which cool the o, 15 upper belt run 17 to such an extent that it moves to the heating means 19, at an approximately constant tenperature.
The part of the apparatus for forming a tubular body includes a mandrel which is referenced 27 in for example Figure 3, a shaping belt 28 which is driven in rotation and which carries a plastic foil strip referenced 29 in Figure 3, on its side which is towards the mandrel 27, and a plurality of shaping assemblies indicated at 30 in e Figure 1, which are arranged at spacings from each other in the longitudinal direction of the mandrel 27 and which shape the shaping o0 belt 28 and the foil strip 29 around the peripheral surface of the 25 mandrel 27, as can be seen fran Figure 3.
Referring now also to Figures 2 and 3, the mandrel 27 which is shown in cross-section in Figure 3 and which is illustrated as being round but which in accordance with the invention may also be o* polygonal, preferably square or rectangular, is arranged on the rmounting plate 10. As shown in Figure 2 it extends in the same direction as and at a spacing with respect to the heating means 19, the pressing means 20 and the cooling means 21. The upper run 24 of KK-868,66 the endless driven lower transportation belt 25 of metal roveS on an external surface of the mandrel 27, being guided in a groove indicated at 31 in Figure 4 in the longitudinal direction of the mandrel 27. The upper run 24 rrving against the mandrel 27 can be seen in Figure 3. At the end of the mandrel 27 which is towards the right in Figure 2, the lower transportation belt 25 passes around a direction-changing roller 32 which is accomrodated in the mandrel 27 in an upwardly open recess indicated at 33, and returns as a lower belt run indicated at 34 in Figure 3 in a recess 49 in the mandrel 27.
The free end of the mandrel 27, which is towards the right in Figure 2, carries a disk 35 over which the interior of the tubular body passes and which is intended to resist the escape of compressed air in the direction of roveirent of the tubular body. The purpose of S• 15 the conpressed air will be referred to below.
S* The other free end of the mandrel 27, that is to say in the region of the heating means 19, does not have any baffle configuration of that kind as that location involves only a slight pressure drop due to the foil strip/shaping belt movement.
The above-mentioned conpressed air is introduced into the tubular body in the region of the heating means 19 by way of air *ducts indicated at 50, 51 and 52 and serves to reduce friction between the foil strip 29 and the mandrel 27. When the pressure of the conpressed air is suitably adjusted, the compressed air also 25 serves to enlarge the diameter of the tubular body to compensate for diametral tolerances which can cause difficulties in terms of further processing of the tubular bodies, in particular fitting them with tube head portions or tops.
Referring now in greater detail to Figure 4, at its botton the groove or slot 31 is provided with a coating or covering 36 on the one hand to reduce friction and on the other hand to provide electrical insulation. In that way, formed between the upper belt run KK-868&6 24 of the lower transportation belt 25 and the lower belt run 18 of the upper transportation belt 16 is a gap in which overlapping edges of the foil strip 29 are initially fused to fomn a welded seam which extends in the longitudinal direction of the tubular body, pressed with the cut edges flowing into each other, and then cooled.
Looking again at Figure 1, the lower transportation belt passes around a drive roller 37 which is arranged fixedly on the mounting plate 10, a freely rotatable adjusting roller 38 which is arranged at its inside, an adjusting roller 39 which is arranged at its outside and which passes the upper belt run 24 into the guide groove 31 in the mandrel 27 and which, co-operating with the direction-changing roller 32, ensures horizontal displacement of the belt run 24 in proper relationship with the botton of the guide groove 31, the above-mentioned direction-changing roller 32 which is 15 not adjustable in tenns of the position of its axis, and an adjusting *o roller For heating of the lower transportation belt 25 to at least o** the entry temperature of the lower belt run 18 into the heating means 19, a heating device 41, preferably in the forn of a high-frequency coil, is disposed upstream of the adjusting roller 39.
Figure 3 shows a shaping assembly 30 with the mandrel 27 mounted within the shaping assembly 30, in section, together with the heating means 19 wLich is disposed above the mandrel 27. The shaping assembly 30 ccmprises a carrier block 42 which is fixed at its side 25 43 to the mounting plate 10. The shaping assembly 30 has three freely rotatable shaping rollers 44, 45 anu 46. The shaping roller 44 which is disposed beneath the mandrel 27 rotates about a horizontal axis while the other shaping rollers 45 and 46 which are arranged at o respective sides of the nmndrel 27 rotate about vertical axes which S 30 are adjustable eccentrically for fine adjustment of the magnitude of the region of overlap of the edges of the foil strip.
Proceeding fron the first or most upstrean shaping assembly 111- i~- KK-868'6 /0 to the shaping assembly 30 which positions the edges of a foil strip 29 in overlapping relationship on the upper run 29 of the transportation belt 25, the spacings of the horizontal and vertical axes of rotation of the rollers of the respective shaping assemblies 30, relative to the center point of the mandrel 27, decrease, so that the convexly shaped peripheral surfaces of the shaping rollers 44, 46 guide the shaping belt 28 which passes between the rollers44, 46 and the mandrel 47, with the foil strip 29 lying thereon, around the mandrel 27 in the longitudinal direction thereof. The width of the shaping belt 28 is less than that of the foil 29 lying thereon.
Looking at Figure 4, the foil strip 29 is guided against the mandrel 27 only to such an extent that edges of the foil strip 29 over lap each other between the lower run 18 of the upper transportation bell: 16 and the upper run 24 of the lower n *o S 15 transportation belt 25, and are held in that position by the edges of the shaping belt 28, but the inward surface of the tubular body formed in that way does not bear against the outside surface of the rrv ndrel 27, to eliminate frictional forces.
In that way, when dealing with plastic foils, including laminate materials of plastic foils of different chemical ccnpositions and including plastic-laminate foils,ithfoil of retal, for exaIple aluminum, stretching of the tube and tearing-away of the overlap seam which is fused in the heating means 19 is prevented by the adjoining non-fused material of the wall of the tubular body, 25 thus ensuring the formation of a welded seam which is of uniform density and tear-free at its outer edges. As soon as the welded sean is of a predetermined level of mechanical strength and stability, due -to the removal of heat therefran, the spacings of the axes of the shaping rollers 44, 45, 46 fran the center point of the mandrel 27
S
increase again so that the shaping belt 28 opens and the shaping belt 28 with the shaped tube, after the tube has been released by the KK- 86 8 6'6 lower belt run 18 and the upper belt run 24, can run off the mandrel 27 substantially in the longitudinal direction relative to the mandrel 27.
As shown in Figure 1, the endless shaping belt 28 which preferably ccxnprises easily deformable, fiber-reinforced plastic material is driven by way of a drive roller 47 and passed around a belt tensioning device 48 and further suitably positioned directionchanging rollers (shown but not referenced).
The drive roller 47, the belt tensioning device 48 and the direction-changing Lollers are arranged on thle mounting plate 10 at spacings such that thle center line of the shaping belt 28 coincides with the vertical center line of the mandrel 27 so that the edges of the shaping belt 28, as they pass through thle shaping assemblies possibly assisted by eccentric positioning of the shaping rollers 46, are always disposed in u)pposite relationship in a substantially 6 horizontal plane, thereby guaranteeing an overlap region which is of see* accurate dimension in terms of its width, as shown in Figure 4.
too*e For the purposes of producing a satisfactory welded seam on tubular bodies fron foils cciriprising plastic material or materials, in particular to provide Eor a satisfactory surface configuration thereof and to prevent the formation of squeezed-out portions of molten plastic material along the inner and outer edges of the OSoverlap region and for thle avoidance of stresses and stretching phenctnena in and at the edges of the weld seam, it has proven to be 25 advantageous for thle transportation belts 16 and 25 and the shaping belt 28 to move at the same speed, so that there is no relative movement between thle lower belt run 18 and the overlapping edges of the foil. strip 29, thle overlapping edges of the foil strip 29 and the upper belt run 24i and between the shaping belt 28 and the foil strip 29 lying thereon, whereby the overlapping edges of the foil are fused, pre-hardened, pressed and cooled between the moving transportation belts 16 and 25, in a rest position in which the overlapping edges are accordingly stationary relative to the transportation belts.
KK-86866 For that purpose the drive rollers 15, 37 and 47 are controlled to be matched to each other in respect of their drive speeds.
Referring now to Figure 5, the mandrel 27 is of such a configuration that it has three hollow spaces or cavities 53, 54 and 55 therein. The cavity 53 is associated with and thus disposed beneath the heating means 19, the cavity 54 is associated with and disposed beneath the pressing means 20 and the cavity 55 is associated with and disposed beneath the cooling means 21.
The cavities 53, 54 and 55 are provided in inserts 56, 57 and 58 respectively which transversely extend through the mandrel 27 in recesses corresponding in terms of their width approximately to the longitudinal extents of the heating means 19, pressing means 20 and cooling means 21, and co-operate with the mandrel 27 to divide the outer periphery thereof.
15 Figure 4 shows the insert 56 in cross-section in the installed position thereof while Figure 5 shows the inserts 56, 57 and 58 in longitudinal section in the installed position thereof in the mandrel 27. With the exception of the wall surfaces which are towards the upper belt run 24 of the transportation belt 25, all other wall surfaces of the cavities 53, 54 and 55 are preferably provided with insulation as indicated at 59 in Figure 4 so that the cavities 53, 54 and 55 are insulated relative to the mandrel 27, the inserts 56, 57 4 t*o and 58 and the intermediate portions 60, 61 between the cavities 53, 54 and 54, 55 respectively so that the thermal contents of the 25 cavities 53, 54, 55 are transmitted to the upper belt run 24 passing S. thereover, and not to the mandrel, whereby a drop in temperature in the mandrel fran the heating means 19 to the cooling means 21 is prevented and the thermal contents of the mandrel can be adjusted sectoriallyin a fashion which is individually matched to the tubular body to be welded.
Figure 4 shows that the cavity 53 accannodates an electrical resistance heating means diagramnatically indicated at 62 which is KK-86866 powered by way of conduits 63. In accordance with the invention it is also possible for the heating means to be in the form of an induction heating means, and both heating arrangements are adjustable in terms of their output power within wide limits. It is also possible for the arrangenent to be such that the cavity 53 can be designed to have a gaseous or liquid agent flowing therethrough, with the provision of feed and discharge conduits of a suitable nature.
The cavity 54 can be supplied with a liquid or gaseous agent by way of conduits indicated at 64 in Figure 4, being a feed and a discharge conduit respectively, and the cavity 55 can be similarly supplied with a liquid or gaseous agent by way of conduits 65, once again being a feed and a discharge conduit respectively, whereby the cavities can be so adjusted in regard to their thermal content that the portions of the belt run 24 corresponding to the respective S* cavities can be appropriately cooled or heated.
The cavities 53, 54 and 55 are preferably heated when starting up the apparatus, in order to minimise the amount of foil waste in the start-up phase. After that initial phase, the thermal content of the cavities 53, 54 and 55 can be adjusted to the optimum values, depending on the particular kind of plastic material to be processed, for example by reducing the temperatures of the heating nmeans and/or the gaseous or liquid agent to provide for warming, pressing with a pre-hardening action and subsequent cooling.
25 It will be appreciated that the above-described apparatus has been set forth by way of example and illustration of the principles of the present invention and that various modifications and alterations may be rade therein without thereby departing from the spirit and scope of the invention.
A

Claims (5)

  1. 2. Apparatus according to claim 1 wherein the means for adjusting the temperatures of the cavities is a fluid.
  2. 3. Apparatus as set forth in claim 2 wherein said fluid agent means is a gas.
  3. 4. Apparatus as set forth in claim 2 wherein said fluid agent means is a liquid. Apparatus as set forth in any one of claims 1 to 4, wherein the first cavity in the mandrel member is operatively associated with the heating means and includes an adjustable electrical resistance heating means.
  4. 6. Apparatus as set forth in claim 5 wherein the first cavity includes an induction heating means.
  5. 7. Apparatus according to claim 1, substantially as herein described with reference to and as illustrated by the accompanying drawings. Dated this 25th day of September 1996. KMK KARL MAEGERLE LIZENZ AG By its Patent Attorneys: GRIFFITH HACK CO. Fellows Institute of Patent Attorneys of Australia. a O a oo *o o* 4e 0 e* r* ABSTRACT OF T'IE DISCLOSURE In an apparatus for the production of tubular bodies such as tubes from a foil strip including a weldable plastic material, the longitudinal edges of which are welded together between two endless belts under the effect of heat and pressure with subsequent cooling, part of a belt runs against a mandrel in which individual portions thereof can be set to different temperatures to provide for selective control of the belt in order to increase the rate of S' production.
AU47320/93A 1993-09-14 1993-09-14 Apparatus for production of tubular bodies Ceased AU674336B2 (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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AU674336B2 true AU674336B2 (en) 1996-12-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575769A (en) * 1968-03-27 1971-04-20 American Can Co Tube side seaming method and apparatus
US4123312A (en) * 1976-09-24 1978-10-31 Automation Industrielle Sa Apparatus for producing collapsible containers
AU5580590A (en) * 1989-06-26 1991-01-03 Minnesota Mining And Manufacturing Company Radiation resistant heat sealable polymer blends of compatible polymers and methods of preparing same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575769A (en) * 1968-03-27 1971-04-20 American Can Co Tube side seaming method and apparatus
US4123312A (en) * 1976-09-24 1978-10-31 Automation Industrielle Sa Apparatus for producing collapsible containers
AU5580590A (en) * 1989-06-26 1991-01-03 Minnesota Mining And Manufacturing Company Radiation resistant heat sealable polymer blends of compatible polymers and methods of preparing same

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