WO2007137374A1 - Process and machine for making a tube-pack - Google Patents

Process and machine for making a tube-pack Download PDF

Info

Publication number
WO2007137374A1
WO2007137374A1 PCT/BG2007/000010 BG2007000010W WO2007137374A1 WO 2007137374 A1 WO2007137374 A1 WO 2007137374A1 BG 2007000010 W BG2007000010 W BG 2007000010W WO 2007137374 A1 WO2007137374 A1 WO 2007137374A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
pack
unit
mandrel
welding
Prior art date
Application number
PCT/BG2007/000010
Other languages
French (fr)
Inventor
Miroslav Ivanov Hinkov
Bhagwat Alok Joshi
Amit Kumar
Original Assignee
Sts Pack Holding Ltd.
Hindustan Lever Limited
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 Sts Pack Holding Ltd., Hindustan Lever Limited filed Critical Sts Pack Holding Ltd.
Priority to EP07719232A priority Critical patent/EP2021166A1/en
Publication of WO2007137374A1 publication Critical patent/WO2007137374A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/002—Handling tubes, e.g. transferring between shaping stations, loading on 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/82—Cores or 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7879—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path
    • B29C65/7882—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path said parts to be joined moving in a circular path
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C66/50—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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/50—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
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics

Definitions

  • the process and machine for making a tube-pack may be applied in the industry to welding of foil pieces with one or more plastic layers, in which there may be also at least one metal layer, or more particularly to making a thin-walled tube-pack.
  • a process and machine for making a part of a tube-pack are known in the prior art [US3388017], more particularly for making the body of the tube-pack, wherein a strip foil is bent around a mandrel having an appropriate shape until its ends are overlapped to obtain a hollow body for further forming of the tube-pack. Then the zone of overlapping is pressed upon with a metal band heated to a temperature appropriate for melting the material. Further on, the band pressed to the foil is transferred along with it into the cooling zone. Cooling is carried out in the course of this transfer with the purpose of obtaining a stable seam. Then a tube body of preset length is cut off from the produced intermediate tube product. So obtained tube bodies are further used for making a tube-pack on other machines or at several work stations on a single machine.
  • a rotary-transfer process and machine for making a tube-pack is known [US5211798], wherein one of the ends of a fabricated tube body at the first station is immersed into preliminarily melted material for shaping the head of the tube- pack. On the subsequent stations this material is formed into the required shape, and after that the tube-pack manufactured is cooled.
  • a process and machine for making a tube-pack is known [US4123312], wherein a strip foil is bent around a fixed mandrel having an appropriate shape until its ends are overlapped to obtain a hollow body for further forming of the tube-pack. Then the zone of overlapping is pressed upon with a metal band heated to a temperature appropriate for melting the material. Further on, the band pressed to the foil is transferred along with it into the cooling zone. Cooling is carried out in the course of this transfer with the purpose of obtaining a stable seam. Then, by using a cutting unit, a tube body of preset length is cut off from the produced intermediate tube product.
  • the following operations are performed on a step- transfer mechanism, e. g. a rotary-transfer one having 10 stations:
  • a fabricated tube-pack head is positioned on the mandrel;
  • Station III The tube body is aligned with the tube-pack head
  • Station IV The process regularity is verified by means of sensors
  • the head is welded to the body by using induction welding and slight pressing;
  • Station VII The zone of welding is cooled
  • Station X The fabricated tube is removed from the rotary-transfer mechanism.
  • a common disadvantage of these known processes and machines for making a tube-pack is that they are of a complex structure, and as a result of the multistation operation with the tube-pack body it frequently becomes distorted along its route, which leads to the occurrence of a considerable amount of reject. This reject is increased when thin-walled bodies are handled, and for this reason these processes and machines cannot be implemented for foil thicknesses below a certain limit value.
  • Still another disadvantage of these processes and machines for making a tube-pack originating also from the fact that the fabricated tube-packs are in bulk state, consists in the fact that when these tube-packs have a shape other than cylindrical, during their loading in the filling station they should be additionally oriented towards the chucks, in which they are positioned, and this also increases the amount of reject and delays the process of filling.
  • the objective of the invention consists in creating of a simplified process and machine for making a tube-pack with improved effectiveness and ability for operating with a thin foil, which will provide, if needed, the capability of subsequent filling of the tube-packs without any additional transferring and positioning.
  • a process for the manufacture of tube-pack suitable for filling fluid materials comprising forming a tubing around a mandrel comprising an outer unit and an inner insert unit; advancing said inner insert unit of said mandrel to pick up a dispensing means; retracting the inner insert unit of said mandrel to position such that the leading edge of the tubing overlaps over the dispensing means; sealing the dispensing means with said tubing to form a tube-pack; advancing said insert unit of mandrel forward to pull the formed tube pack to a length at least equal to the length of tube pack retracting said insert unit back by a length at least equal to the length of the tube pack and Separating the tube-pack from said mandrel.
  • This objective is attained by creating a process for making a tube-pack, wherein a strip foil is fed to a fixed mandrel having a preset shape.
  • the foil is bent around the fixed mandrel.
  • the overlapped ends of the bent foil are pressed onto the fixed mandrel and welded to each other.
  • the manufacture of the tube-pack is realized in two parallel cycles: a first cycle for carrying out the longitudinal welding of the overlapped ends; a second cycle for performing the front welding of the tube head to the already fabricated tube-pack body during the first cycle.
  • a multi-functional technical means is used to feed a pre-fabricated and appropriately positioned tube head to the welded tube-pack body.
  • Said head is aligned with the end of the welded tube-pack body, and then the end of the tube- pack body is bent and pressed onto the tube head in the zone of overlapping.
  • a shaping unit and welding unit are fed to the zone of overlapping, said units being used for shaping and heating the material up to the temperature of melting.
  • the shaping unit and welding unit are pulled back.
  • the welding unit is separated from the shaping unit, and the fabricated tube is pushed in a controlled manner way by the multi-functional technical means to its positioning in the shaping unit. It follows a pull-back of the technical means from the tube to its initial station, said technical means having been used for pushing the tube out of the fixed mandrel.
  • the taken-out tube is cut off to the preset length and along with the shaping unit is removed from the working station. All operations of making a new tube-pack are repeated at the next step. It is possible to perform welding of the longitudinal seam of the tube-pack body by using induction or ultrasound, or by applying another appropriate known method.
  • a machine for making a tube-pack consisting of a unit for positioning the pre-fabricated tube head and a mechanism for feeding a strip foil to a fixed mandrel with preset shape, mechanism for bending the foil around the mandrel and unit for pressing and welding the overlapped ends of the bent foil to the fixed mandrel.
  • An M-step transfer mechanism is situated with a working seat against the working end of the fixed mandrel.
  • the machine has also a shaping unit, welding unit, and cutting unit.
  • the unit for positioning the preliminarily fabricated tube head is situated at a preceding working seat. In each working seat there is its respective shaping unit, wherein a preliminarily fabricated tube head is positioned.
  • the fixed mandrel is hollow and a movable mandrel is coaxially situated in said fixed mandrel, wherein the front part of the working end of said movable mandrel is shaped negatively with respect to the internal surface of the tube head, and its external surface, which is not covered by the tube head, is broader with 0.05 to 0.3 mm than said tube head all over its periphery. At its other end this broad part of the movable mandrel passes on smoothly into its thinner tail.
  • the welding unit is positioned under the working seat, coaxially to the two mandrels. Clamps are situated laterally to the fixed mandrel in the working end region of the movable mandrel.
  • a driving mechanism for the movable mandrel is connected to its tail.
  • the driving mechanism for the welding unit is connected with its bottom.
  • the cutting unit is situated between the clamps and shaping unit.
  • the mechanism for pressing the overlapped ends of bent foil to the fixed mandrel is a welding one as well.
  • the gap of the non-closed restrictor is intended for providing a contact between the mechanism for pressing and welding and the overlapped ends of the bent foil.
  • a respective standard mechanism for removing the fabricated tube-packs from the shaping units is situated at an appropriate station to the M-step transfer mechanism. It is possible that the machine for making a tube-pack has a vertical common axis of the fixed mandrel and movable mandrel.
  • the machine for making a tube-pack has a horizontal or inclined common axis of the fixed mandrel and movable mandrel.
  • the mechanism for pressing and welding is an induction or ultrasound one, or another appropriate known such mechanism.
  • the welding unit is an induction one and the shaping unit is made of dielectric material.
  • the welding unit is an ultrasound one and the shaping unit is made of metal.
  • the M-step transfer mechanism is of a rotary-transfer or linear type, or having an arbitrary planar trajectory of motion
  • the shape of the movable mandrel is other than cylindrical.
  • the movable mandrel has a through conduit for feeding gas under pressure into the zone of welding the tube head to the tube-pack body.
  • Said gas may be air.
  • the machine When the machine has a vertical common axis of the two mandrels, above the corresponding working seats there are situated the following units: a standard unit for filling; standard unit for welding of the tube-pack bottom and its marking; standard unit for trimming the welded end; standard unit for taking out the fabricated filled tube (not shown in the figures).
  • An advantage of the process and machine for making a tube-pack is that they are simplified and feature improved effectiveness.
  • Another advantage of theirs is that they provide ability for working with a thin foil.
  • Still another advantage is that if needed they will provide ability for subsequent filling of the tube-packs without any additional transferring and positioning.
  • - Fig. 1 is a longitudinal section of the machine
  • - Fig.2 is a transversal section of the machine from Fig. 1 along AA;
  • - Fig. 3 is a transversal section of the machine from Fig. 1 along BB;
  • Fig. 4 is an axonometric sketch of the machine, including units for preliminary positioning of the tube heads, filling of the fabricated tube-packs and their welding;
  • - Fig. 5 shows the state of the working organs of the machine at the beginning of its operation
  • - Fig. 6 is a section along AA from Fig. 5;
  • - Fig.7 is the state of the working organs of the machine at the time of slipping the tube head over the movable mandrel;
  • - Fig. 8 is the state of the working organs of the machin at the time of alignment of the tube head with the end of the welded foil;
  • - Fig. 9 is a magnified view in the zone A from Fig. 8; - Fig. 10 is the state of the working organs of the machine at the time of the front welding;
  • - Fig. 11 is the state of the working organs of the machine at the time after pulling off the intermediate welded tube product
  • - Fig. 12 is the state of the working organs of the machin at the time of cutting off the fabricated tube
  • - Fig. 13 is the state of the working organs of the machine at the end of the working cycle immediately before removing the fabricated tube.
  • the machine for making a tube-pack shown in the figures consists of a unit 23 for positioning of a pre-fabricated tube head 12 and a mechanism 1 for feeding a strip foil 2 to a fixed mandrel 3 with a preset shape, mechanism 4 for bending the foil 2 around the mandrel 3 and a unit for pressing and welding 5 for the overlapped ends 6 of the bent foil 2 to the mandrel 3.
  • An M-step transfer mechanism 7 is situated with a working seat 8i against the working end of the mandrel 3.
  • the machine has also a shaping unit 9, welding unit 10 and cutting unit 11.
  • each working seat 8m there is its respective shaping unit 9m, wherein a pre-fabricated tube head 12 is positioned.
  • the fixed mandrel 3 is hollow and a movable mandrel 13 is coaxially situated in it, the front of the working end 14 of said mandrel being shaped negatively with respect to the internal surface of the tube head 12, and its external surface, which is not covered by the tube head 12, being broader with 0.05 to 0.3 mm all over its periphery. In its other end this broad part of the movable mandrel 13 passes on smoothly into its thinner tail.
  • the welding unit 10 it is positioned under the working seat 8i, coaxially to mandrels 3 and 13.
  • Clamps 15 are situated laterally to the fixed mandrel 3 in the area of the working end 14 of the movable mandrel 13.
  • a driving mechanism 16 for the movable mandrel 13 is coupled to the tail of said mandrel.
  • the driving mechanism 17 for the welding unit 10 is coupled with the bottom of said unit.
  • the cutting unit 11 is situated between the clamps 15 and the shaping unit 9.
  • the mechanism 5 for pressing the overlapped ends 6 of the bent foil 2 to the mandrel 3 is a welding one as well.
  • the foil 2 being located between said restrictor and the external surface of said fixed mandrel.
  • the gap 20 of the non-closed restrictor 18 is intended for providing a contact between the mechanism 5 for pressing and welding and the overlapped ends 6 of the bent foil.
  • a respective standard mechanism (not shown in the figures) for removing the fabricated tube-packs from the shaping units 9m is situated at an appropriate station to the M-step transfer mechanism 7.
  • the machine for making a tube-pack has a vertical common axis of the fixed mandrel 3 and movable mandrel 13.
  • the machine for making a tube-pack has a horizontal or inclined common axis of the fixed mandrel 3 and movable mandrel 13.
  • the mechanism for pressing and welding 5 is an induction or ultrasound one, or another appropriate known such mechanism.
  • the welding unit 10 is an induction one and the shaping unit 9 is made of dielectric material.
  • the welding unit 10 is an ultrasound one and the shaping unit 9 is made of metal.
  • the M-step transfer mechanism 7 is of a rotary-transfer or linear type, or having an arbitrary planar trajectory of motion.
  • the shape of the movable mandrel 13 is other than cylindrical. It is possible that in the machine for making a tube-pack the movable mandrel 13 has a through conduit 24 for feeding a gas under pressure into the zone of welding the tube head 12 to the tube-pack body. Said gas may be air.
  • a standard unit for filling 21 When the machine has a vertical common axis of the mandrels, above the corresponding working seats 8 there are situated the following units: a standard unit for filling 21; standard unit for welding 22 of the tube-pack bottom and its marking; standard unit for trimming of the welded end (not shown in the figures); standard unit for taking out the fabricated filled tube-pack (not shown in the figures).
  • the strip material 2 e. g. a multi-layer foil with at least one metal layer, most often of Al
  • the feeding mechanism 1 is fed by means of the feeding mechanism 1 to the fixed mandrel 3 having a preset shape (normally being cylindrical), Fig. 1.
  • said foil is being bent with the aid of the bending mechanism 4 until it envelops the fixed mandrel 3 in such a way that the ends 6 of the foil 2 are overlapped, Figs. 2 and 3.
  • the necessary degree of overlapping normally from 0.5 to 2 mm, is guaranteed through the use of a foil 2 with appropriate width.
  • the working cycle of the machine consists of two parallel cycles: a first cycle for longitudinal welding of the overlapped ends 6 and second cycle for front welding of the tube head 12 to the tube-pack body that has already been fabricated during the cycle for longitudinal welding.
  • the cycle for longitudinal welding consists of:
  • the cycle for front welding of the tube head 12 to the tube-pack body is as follows:
  • the movable mandrel 13 is pulled back, carrying the tube head 12 until attaining a position in which the welded end of the foil 2 is aligned with the tube head 12, covering externally said head a bit above the zone of its beveling; in this case the external surface of the movable mandrel 13, not being covered by the tube head 12 as said surface is broader with 0.05 to 0.3 mm than said head all over its periphery, shapes the end of the welded foil and creates conditions for the problemless introduction of the tube head 12 into said foil, Fig. 9.
  • the transition from this broad part of the movable mandrel 13 to its thinner tail provides the same effect in the reverse direction by restoring the initial shape of the foil, said shape being distorted after cutting off of the preceding tube-pack, Fig. 8.
  • the welding unit 10 is being fed to the zone of overlapping of the foil 2 and the tube head 12 and along its path said unit sets in motion the shaping unit 9.
  • the shaping unit 9 bends the end of the foil 2 and presses said end to the beveled part of the tube head 12, Fig. 10. In such a way a good-quality zone is formed for the subsequent welding;
  • a current of high frequency is fed to the winding of the welding unit 10 by the high-frequency generator HFG of said unit.
  • the electromagnetic field exited by said current heats inductively the metal layer in the foil 2, and said metal layer melts its adjacent plastic layers as well as the surface plastic layer of the tube head 12. Under the effect of the accompanying pressing these melted layers are mixed into one another, then the inductive heating is terminated, and under pressing it is awaited for the welded zone to cool down;
  • the welding unit 10 is pulled back into its initial position and the movable mandrel 13 is being fed to said unit, whereupon said mandrel pushes off the shaping unit 9 and pulls over itself the tube head 12 together with the foil 2 welded on said head, Fig. 11. Said pulling is carried out up to a preset length corresponding to the required length of the manufactured tube-pack.
  • stopping of the movable mandrel 13 and shaping unit 9 is performed when the shaping unit 9 has already entered the corresponding working seat 8;
  • a gas e. g. air
  • a gas under pressure is fed through the conduit 24 in the movable mandrel 13, said gas passing through the output opening of the conduit 24 in the front of the movable mandrel 13 and filling up the space between said mandrel and the internal surface of the tube head 12.
  • the so created pressure facilitates the separation of the movable mandrel 13 from said tube head and prevents any deformations of the intermediate product obtained, Fig. 11;
  • a fabricated tube with the preset length is cut off by means of the cutting unit 11, Fig. 12.
  • the tube head 12 is in the shaping unit 9, after cutting said head sinks slightly into said unit and in such a way it is stabilized in the space, Fig. 13; - the rotary-transfer mechanism 7 starts turning and takes the shaping unit 9 together with the fabricated tube positioned in said unit out of the working zone;

Abstract

The invention relates to manufacture of thin-walled tube-packs. The machine consists of a unit (23) for positioning a pre-fabricated tube head (12) and a mechanism (1) for feeding a strip foil (2) to a fixed mandrel (3) with preset shape, mechanism (4) for bending the foil (2) and unit for pressing and welding (5). An M-step transfer mechanism (7) is in a working seat (8i). The machine has also a shaping unit (9), welding unit (10) and cutting unit (11). The unit (23) for positioning a pre-fabricated tube head (12) is situated at a preceding working seat (8<SUB>m-n</SUB>) (n = 1 to 4). The welding unit (10) is positioned under the working seat (8<SUB>1</SUB>), coaxially to mandrel (3) and (13). A driving mechanism (16) is for the mandrel (13). The cutting unit (11) is situated between the clamps (15) and shaping unit (9). The foil being located between the mandrel (3) and a restructure (18). The gap (20) of the non-closed restructure (18) is intended for providing a contact between the mechanism (5) for pressing and welding and the overlapped ends (6) of the bent foil.

Description

PROCESS AND MACHINE FOR MAKING A TUBE-PACK
FIELD OF THE INVENTION
The process and machine for making a tube-pack may be applied in the industry to welding of foil pieces with one or more plastic layers, in which there may be also at least one metal layer, or more particularly to making a thin-walled tube-pack.
BACKGROUND OF THE INVENTION
A process and machine for making a part of a tube-pack are known in the prior art [US3388017], more particularly for making the body of the tube-pack, wherein a strip foil is bent around a mandrel having an appropriate shape until its ends are overlapped to obtain a hollow body for further forming of the tube-pack. Then the zone of overlapping is pressed upon with a metal band heated to a temperature appropriate for melting the material. Further on, the band pressed to the foil is transferred along with it into the cooling zone. Cooling is carried out in the course of this transfer with the purpose of obtaining a stable seam. Then a tube body of preset length is cut off from the produced intermediate tube product. So obtained tube bodies are further used for making a tube-pack on other machines or at several work stations on a single machine.
A rotary-transfer process and machine for making a tube-pack is known [US5211798], wherein one of the ends of a fabricated tube body at the first station is immersed into preliminarily melted material for shaping the head of the tube- pack. On the subsequent stations this material is formed into the required shape, and after that the tube-pack manufactured is cooled.
A process and machine for making a tube-pack is known [US4123312], wherein a strip foil is bent around a fixed mandrel having an appropriate shape until its ends are overlapped to obtain a hollow body for further forming of the tube-pack. Then the zone of overlapping is pressed upon with a metal band heated to a temperature appropriate for melting the material. Further on, the band pressed to the foil is transferred along with it into the cooling zone. Cooling is carried out in the course of this transfer with the purpose of obtaining a stable seam. Then, by using a cutting unit, a tube body of preset length is cut off from the produced intermediate tube product. The following operations are performed on a step- transfer mechanism, e. g. a rotary-transfer one having 10 stations:
Station I: A fabricated tube-pack head is positioned on the mandrel;
Station II: The fabricated tube body made according to the procedure described above is partially slipped over the mandrel with the already positioned tube-pack head;
Station III: The tube body is aligned with the tube-pack head;
Station IV: The process regularity is verified by means of sensors;
Station V: The correspondingthey zones of the head and body are heated by a jet of hot air, which prepares them for welding;
Station VI: The head is welded to the body by using induction welding and slight pressing;
Station VII: The zone of welding is cooled;
Station VIII: If necessary, a cap is placed on the head opening;
Station IX: The fabricated tube is partially taken out of the mandrel through blowing off;
Station X: The fabricated tube is removed from the rotary-transfer mechanism.
A common disadvantage of these known processes and machines for making a tube-pack is that they are of a complex structure, and as a result of the multistation operation with the tube-pack body it frequently becomes distorted along its route, which leads to the occurrence of a considerable amount of reject. This reject is increased when thin-walled bodies are handled, and for this reason these processes and machines cannot be implemented for foil thicknesses below a certain limit value.
Another disadvantage of these processes and machines for making a tube- pack is that the fabricated tube-packs are in bulk state and must be transferred to an autonomous filling station, which makes the manufacture more expensive and increases additionally the risk of deformations.
Still another disadvantage of these processes and machines for making a tube-pack, originating also from the fact that the fabricated tube-packs are in bulk state, consists in the fact that when these tube-packs have a shape other than cylindrical, during their loading in the filling station they should be additionally oriented towards the chucks, in which they are positioned, and this also increases the amount of reject and delays the process of filling.
The objective of the invention consists in creating of a simplified process and machine for making a tube-pack with improved effectiveness and ability for operating with a thin foil, which will provide, if needed, the capability of subsequent filling of the tube-packs without any additional transferring and positioning.
TECHNICAL ESSENCE OF THE INVENTION
According to the present invention there is provided a process for the manufacture of tube-pack suitable for filling fluid materials, comprising forming a tubing around a mandrel comprising an outer unit and an inner insert unit; advancing said inner insert unit of said mandrel to pick up a dispensing means; retracting the inner insert unit of said mandrel to position such that the leading edge of the tubing overlaps over the dispensing means; sealing the dispensing means with said tubing to form a tube-pack; advancing said insert unit of mandrel forward to pull the formed tube pack to a length at least equal to the length of tube pack retracting said insert unit back by a length at least equal to the length of the tube pack and Separating the tube-pack from said mandrel.
The following description is with reference to specific details and it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.
This objective is attained by creating a process for making a tube-pack, wherein a strip foil is fed to a fixed mandrel having a preset shape. The foil is bent around the fixed mandrel. The overlapped ends of the bent foil are pressed onto the fixed mandrel and welded to each other. The manufacture of the tube-pack is realized in two parallel cycles: a first cycle for carrying out the longitudinal welding of the overlapped ends; a second cycle for performing the front welding of the tube head to the already fabricated tube-pack body during the first cycle. At the same time a multi-functional technical means is used to feed a pre-fabricated and appropriately positioned tube head to the welded tube-pack body. Said head is aligned with the end of the welded tube-pack body, and then the end of the tube- pack body is bent and pressed onto the tube head in the zone of overlapping. After this a shaping unit and welding unit are fed to the zone of overlapping, said units being used for shaping and heating the material up to the temperature of melting. After terminating the heating, it should be awaited for the zone of overlapping to harden, and the shaping unit and welding unit are pulled back. The welding unit is separated from the shaping unit, and the fabricated tube is pushed in a controlled manner way by the multi-functional technical means to its positioning in the shaping unit. It follows a pull-back of the technical means from the tube to its initial station, said technical means having been used for pushing the tube out of the fixed mandrel. The taken-out tube is cut off to the preset length and along with the shaping unit is removed from the working station. All operations of making a new tube-pack are repeated at the next step. It is possible to perform welding of the longitudinal seam of the tube-pack body by using induction or ultrasound, or by applying another appropriate known method.
After making the fabricated tube, it is possible to fill it at the next stations by means of an M-step transfer, weld its bottom, and carry out its marking and/or trimming of its welded end if needed, after which it will be taken out as a ready-to- use filled tube.
It is also created a machine for making a tube-pack consisting of a unit for positioning the pre-fabricated tube head and a mechanism for feeding a strip foil to a fixed mandrel with preset shape, mechanism for bending the foil around the mandrel and unit for pressing and welding the overlapped ends of the bent foil to the fixed mandrel. An M-step transfer mechanism is situated with a working seat against the working end of the fixed mandrel. The machine has also a shaping unit, welding unit, and cutting unit. The unit for positioning the preliminarily fabricated tube head is situated at a preceding working seat. In each working seat there is its respective shaping unit, wherein a preliminarily fabricated tube head is positioned. The fixed mandrel is hollow and a movable mandrel is coaxially situated in said fixed mandrel, wherein the front part of the working end of said movable mandrel is shaped negatively with respect to the internal surface of the tube head, and its external surface, which is not covered by the tube head, is broader with 0.05 to 0.3 mm than said tube head all over its periphery. At its other end this broad part of the movable mandrel passes on smoothly into its thinner tail. The welding unit is positioned under the working seat, coaxially to the two mandrels. Clamps are situated laterally to the fixed mandrel in the working end region of the movable mandrel. A driving mechanism for the movable mandrel is connected to its tail. The driving mechanism for the welding unit is connected with its bottom. The cutting unit is situated between the clamps and shaping unit. The mechanism for pressing the overlapped ends of bent foil to the fixed mandrel is a welding one as well. Around the fixed mandrel there is a non-closed restrictor, the foil being located between said restrictor and the external surface of the fixed mandrel. The gap of the non-closed restrictor is intended for providing a contact between the mechanism for pressing and welding and the overlapped ends of the bent foil. A respective standard mechanism for removing the fabricated tube-packs from the shaping units is situated at an appropriate station to the M-step transfer mechanism. It is possible that the machine for making a tube-pack has a vertical common axis of the fixed mandrel and movable mandrel.
It is possible that the machine for making a tube-pack has a horizontal or inclined common axis of the fixed mandrel and movable mandrel.
It is possible that in the machine for making a tube-pack the mechanism for pressing and welding is an induction or ultrasound one, or another appropriate known such mechanism.
It is possible that in the machine for making a tube-pack the welding unit is an induction one and the shaping unit is made of dielectric material.
It is possible that in the machine for making a tube-pack the welding unit is an ultrasound one and the shaping unit is made of metal.
It is possible that in the machine for making a tube-pack the M-step transfer mechanism is of a rotary-transfer or linear type, or having an arbitrary planar trajectory of motion;
It is possible that in the machine for making a tube-pack the shape of the movable mandrel is other than cylindrical.
It is possible that in the machine for making a tube-pack the movable mandrel has a through conduit for feeding gas under pressure into the zone of welding the tube head to the tube-pack body. Said gas may be air.
When the machine has a vertical common axis of the two mandrels, above the corresponding working seats there are situated the following units: a standard unit for filling; standard unit for welding of the tube-pack bottom and its marking; standard unit for trimming the welded end; standard unit for taking out the fabricated filled tube (not shown in the figures).
An advantage of the process and machine for making a tube-pack is that they are simplified and feature improved effectiveness.
Another advantage of theirs is that they provide ability for working with a thin foil.
Still another advantage is that if needed they will provide ability for subsequent filling of the tube-packs without any additional transferring and positioning.
DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention is explained in more details with the help of an exemplary embodiment of the process and machine for making a tube-pack, which is shown in the figures, where:
- Fig. 1 is a longitudinal section of the machine;
- Fig.2 is a transversal section of the machine from Fig. 1 along AA;
- Fig. 3 is a transversal section of the machine from Fig. 1 along BB;
- Fig. 4 is an axonometric sketch of the machine, including units for preliminary positioning of the tube heads, filling of the fabricated tube-packs and their welding;
- Fig. 5 shows the state of the working organs of the machine at the beginning of its operation;
- Fig. 6 is a section along AA from Fig. 5;
- Fig.7 is the state of the working organs of the machine at the time of slipping the tube head over the movable mandrel;
- Fig. 8 is the state of the working organs of the machin at the time of alignment of the tube head with the end of the welded foil;
- Fig. 9 is a magnified view in the zone A from Fig. 8; - Fig. 10 is the state of the working organs of the machine at the time of the front welding;
- Fig. 11 is the state of the working organs of the machine at the time after pulling off the intermediate welded tube product;
- Fig. 12 is the state of the working organs of the machin at the time of cutting off the fabricated tube;
- Fig. 13 is the state of the working organs of the machine at the end of the working cycle immediately before removing the fabricated tube.
EXEMPLARY EMBODIMENT OF THE INVENTION
The machine for making a tube-pack shown in the figures consists of a unit 23 for positioning of a pre-fabricated tube head 12 and a mechanism 1 for feeding a strip foil 2 to a fixed mandrel 3 with a preset shape, mechanism 4 for bending the foil 2 around the mandrel 3 and a unit for pressing and welding 5 for the overlapped ends 6 of the bent foil 2 to the mandrel 3. An M-step transfer mechanism 7 is situated with a working seat 8i against the working end of the mandrel 3. The machine has also a shaping unit 9, welding unit 10 and cutting unit 11. The unit 23 for positioning the pre-fabricated tube head 12 is situated at a preceding working seat 8m-n (n = i to 4). In each working seat 8m there is its respective shaping unit 9m, wherein a pre-fabricated tube head 12 is positioned. The fixed mandrel 3 is hollow and a movable mandrel 13 is coaxially situated in it, the front of the working end 14 of said mandrel being shaped negatively with respect to the internal surface of the tube head 12, and its external surface, which is not covered by the tube head 12, being broader with 0.05 to 0.3 mm all over its periphery. In its other end this broad part of the movable mandrel 13 passes on smoothly into its thinner tail. The welding unit 10 it is positioned under the working seat 8i, coaxially to mandrels 3 and 13. Clamps 15 are situated laterally to the fixed mandrel 3 in the area of the working end 14 of the movable mandrel 13. A driving mechanism 16 for the movable mandrel 13 is coupled to the tail of said mandrel. The driving mechanism 17 for the welding unit 10 is coupled with the bottom of said unit. The cutting unit 11 is situated between the clamps 15 and the shaping unit 9. The mechanism 5 for pressing the overlapped ends 6 of the bent foil 2 to the mandrel 3 is a welding one as well. Around the fixed mandrel 3 there is a non- closed restrictor 18, the foil 2 being located between said restrictor and the external surface of said fixed mandrel. The gap 20 of the non-closed restrictor 18 is intended for providing a contact between the mechanism 5 for pressing and welding and the overlapped ends 6 of the bent foil. A respective standard mechanism (not shown in the figures) for removing the fabricated tube-packs from the shaping units 9m is situated at an appropriate station to the M-step transfer mechanism 7.
It is possible that the machine for making a tube-pack has a vertical common axis of the fixed mandrel 3 and movable mandrel 13.
It is possible that the machine for making a tube-pack has a horizontal or inclined common axis of the fixed mandrel 3 and movable mandrel 13.
It is possible that in the machine for making a tube-pack the mechanism for pressing and welding 5 is an induction or ultrasound one, or another appropriate known such mechanism.
It is possible that in the machine for making a tube-pack the welding unit 10 is an induction one and the shaping unit 9 is made of dielectric material.
It is possible that in the machine for making a tube-pack the welding unit 10 is an ultrasound one and the shaping unit 9 is made of metal.
It is possible that in the machine for making a tube-pack the M-step transfer mechanism 7 is of a rotary-transfer or linear type, or having an arbitrary planar trajectory of motion.
It is possible that in the machine for making a tube-pack the shape of the movable mandrel 13 is other than cylindrical. It is possible that in the machine for making a tube-pack the movable mandrel 13 has a through conduit 24 for feeding a gas under pressure into the zone of welding the tube head 12 to the tube-pack body. Said gas may be air.
When the machine has a vertical common axis of the mandrels, above the corresponding working seats 8 there are situated the following units: a standard unit for filling 21; standard unit for welding 22 of the tube-pack bottom and its marking; standard unit for trimming of the welded end (not shown in the figures); standard unit for taking out the fabricated filled tube-pack (not shown in the figures).
FUNCTIONING OF THE INVENTION
The machine shown in the figures and implementing the process for making a tube-pack operates in the following way:
After the initial period of loading the machine with consumables, in working mode the strip material 2, e. g. a multi-layer foil with at least one metal layer, most often of Al, is fed by means of the feeding mechanism 1 to the fixed mandrel 3 having a preset shape (normally being cylindrical), Fig. 1. In the course of the movement of the foil 2 said foil is being bent with the aid of the bending mechanism 4 until it envelops the fixed mandrel 3 in such a way that the ends 6 of the foil 2 are overlapped, Figs. 2 and 3. The necessary degree of overlapping, normally from 0.5 to 2 mm, is guaranteed through the use of a foil 2 with appropriate width. When the foil 2 reaches the zone of the unit for pressing and welding 5 for pressing the overlapped ends 6 of the bent foil, said foil would have already enveloped completely the fixed mandrel 3, Fig. 3. The working cycle of the machine consists of two parallel cycles: a first cycle for longitudinal welding of the overlapped ends 6 and second cycle for front welding of the tube head 12 to the tube-pack body that has already been fabricated during the cycle for longitudinal welding. The cycle for longitudinal welding consists of:
- feeding the unit for pressing and welding 5 to the foil 2 that has already been bent around the fixed mandrel 3, Fig. 3;
- feeding a high-frequency voltage from the corresponding generator HFG to the unit for pressing and welding 5, the clamp of said unit being also an inductor, Figs. 1 and 3;
- awaiting for the expiration of the time period necessary for melting and connecting the overlapped ends 6 as well as awaiting for the expiration of the time period necessary for cooling the zone of welding, Fig. 6;
- pulling back the mechanism for pressing 5.
The cycle for front welding of the tube head 12 to the tube-pack body is as follows:
- the tube head 12, preliminarily placed at the working seat 8, is moved coaxially under the movable mandrel 13 by means of the M-step transfer mechanism 7, said mechanism being a rotary-transfer one in the given case, Fig. 5;
- the movable mandrel 13 is being fed to the tube head 12 until said head is slipped over its front, Fig.7;
- the movable mandrel 13 is pulled back, carrying the tube head 12 until attaining a position in which the welded end of the foil 2 is aligned with the tube head 12, covering externally said head a bit above the zone of its beveling; in this case the external surface of the movable mandrel 13, not being covered by the tube head 12 as said surface is broader with 0.05 to 0.3 mm than said head all over its periphery, shapes the end of the welded foil and creates conditions for the problemless introduction of the tube head 12 into said foil, Fig. 9. The transition from this broad part of the movable mandrel 13 to its thinner tail provides the same effect in the reverse direction by restoring the initial shape of the foil, said shape being distorted after cutting off of the preceding tube-pack, Fig. 8.
- the welding unit 10 is being fed to the zone of overlapping of the foil 2 and the tube head 12 and along its path said unit sets in motion the shaping unit 9. When these two units attain the zone of overlapping, the shaping unit 9 bends the end of the foil 2 and presses said end to the beveled part of the tube head 12, Fig. 10. In such a way a good-quality zone is formed for the subsequent welding;
- a current of high frequency is fed to the winding of the welding unit 10 by the high-frequency generator HFG of said unit. The electromagnetic field exited by said current heats inductively the metal layer in the foil 2, and said metal layer melts its adjacent plastic layers as well as the surface plastic layer of the tube head 12. Under the effect of the accompanying pressing these melted layers are mixed into one another, then the inductive heating is terminated, and under pressing it is awaited for the welded zone to cool down;
- the welding unit 10 is pulled back into its initial position and the movable mandrel 13 is being fed to said unit, whereupon said mandrel pushes off the shaping unit 9 and pulls over itself the tube head 12 together with the foil 2 welded on said head, Fig. 11. Said pulling is carried out up to a preset length corresponding to the required length of the manufactured tube-pack. Here it is provided through preliminarily regulation of the machine that stopping of the movable mandrel 13 and shaping unit 9 is performed when the shaping unit 9 has already entered the corresponding working seat 8;
- the movable mandrel 13 goes back to its initial position. In another embodiment where a thin foil is used a gas, e. g. air, under pressure is fed through the conduit 24 in the movable mandrel 13, said gas passing through the output opening of the conduit 24 in the front of the movable mandrel 13 and filling up the space between said mandrel and the internal surface of the tube head 12. The so created pressure facilitates the separation of the movable mandrel 13 from said tube head and prevents any deformations of the intermediate product obtained, Fig. 11;
- a fabricated tube with the preset length is cut off by means of the cutting unit 11, Fig. 12. As the tube head 12 is in the shaping unit 9, after cutting said head sinks slightly into said unit and in such a way it is stabilized in the space, Fig. 13; - the rotary-transfer mechanism 7 starts turning and takes the shaping unit 9 together with the fabricated tube positioned in said unit out of the working zone;
In the variant where the fabricated tube-packs are being filled by another autonomous machine said tube-packs are taken out of the shaping units 9 by means of corresponding standard mechanisms (not shown in the figures);
When the fabricated tube-packs are filled by the same machine which is equipped above some working seats 8 (Fig. 4) with corresponding units for filling 21, welding of the tube bottom 22 (which may simultaneously mark the tube-pack as well), trimming of the welded end (not shown in the figures), and taking out the fabricated filled tube-packs (not shown in the figures), said tube-packs are not taken out of the shaping units 9.
In such a way it is achieved simplification through optimized process and machine, which efficiently provide ability for working with a thin foil. Moreover, if needed, said process and machine will provide ability for subsequent filling of tube-packs without any additional transferring and positioning.

Claims

PATENT CLAIMS
1. A process for making a tube-pack, wherein a strip foil (2) is fed to a fixed mandrel (3) with preset shape, wherein the foil (2) is bent around the mandrel (3), and the overlapped ends (6) of the bent foil (2) are pressed to the mandrel (3) and welded to each other, characterised by the fact that the manufacture of the tube- pack consists of two parallel cycles: a first cycle for performing the longitudinal welding of the overlapped ends (6) and second cycle for performing the front welding of the tube head (12) to the tube-pack body that has already been fabricated during the first cycle, wherein a preliminarily fabricated and appropriately positioned tube head (12) is fed to the welded tube-pack body by means of a multi-functional technical means (13), said tube head being aligned with with the end of the welded tube-pack body, whereafter in the zone of overlapping the end of the tube-pack body is bent and pressed to the tube head, whereafter a shaping unit (9) and welding unit (10) are fed into the zone of overlapping, said units being used for shaping and heating to the temperature of melting of the material, after which heating is terminated and its is awaited for the zone of overlapping to harden, and the shaping unit (9) and welding unit (10) are pulled back, whereupon the welding unit (10) is separated from the shaping unit (9), and the fabricated tube-pack is pushed in a controlled manner by the multifunctional technical means (13) up to its positioning into the shaping unit (9), whereafter said technical means (13) that has been used for pushing off the tube from the fixed mandrel (3) is pulled back from the tube to its initial position, then said tube is cut off to the preset length and together with the shaping unit (9) is removed from the working station, and all the operations regarding the manufacture of a new tube-pack are repeated at the next step.
2. A process for making a tube-pack according to claim 1, characterised by the fact that welding of the longitudinal seam of the tube-pack body is of induction or ultrasound type, or is performed by applying another appropriate known method.
3. A process for making a tube-pack according to claims 1 and 2, characterized by the fact that after the manufacture of the fabricated tube-pack at the subsequent stations by means of M-step transferring said tube-pack is filled, its bottom is welded, and if needed said tube-pack is submitted to marking and/or trimming of its welded end, whereafter said tube-pack is removed as a ready-to-use filled tube-pack.
4. A machine for making a tube-pack consisting of a unit (23) for positioning a pre-fabricated tube head (12) and a mechanism (1) for feeding of strip foil (2) to a fixed mandrel (3) with preset shape, mechanism (4) for bending the foil (2) around the mandrel (3) and unit for pressing and welding (5) for the overlapped ends (6) of the bent foil (2) to the mandrel (3), wherein an M-step transfer mechanism (7) is situated with working seat (8i) against the working end of the mandrel (3), as well as of a shaping unit (9), welding unit (10) and cutting unit (11), characterized by the fact that the unit (23) for positioning the prefabricated tube head (12) is situated at a preceding working seat (8m-n) (n = 1 to 4), and at each working seat (8m) there is its respective shaping unit (9m), in which a pre-fabricated tube head (12) is positioned, and the fixed mandrel (3) is hollow and a movable mandrel (13) is situated coaxially in said fixed mandrel, whereupon the front of the working end (14) of said movable mandrel is shaped negatively to the internal surface of the tube head (12), and its external surface, which is not covered by the tube head (12), is broader with 0.05 to 0.3 mm all over its periphery, at its other end this broad part of the movable mandrel (13) passes on smoothly into its thinner tail, and under the working seat (8i) the welding unit (10) is positioned coaxially to the mandrels (3) and (13), and clamps (15) are situated laterally to the fixed mandrel (3) in the area of the working end (14) of the movable mandrel (13), whereupon a driving mechanism (16) for the movable mandrel (13) is coupled to the tail of said mandrel, and a driving mechanism (17) for the welding unit (10) is coupled with the bottom of said und, and the cutting unit (11) is situated between the clamps (15) and shaping unit (9), whereupon the mechanism (5) for pressing the overlapped ends (6) of the bent foil (2) to the mandrel (3) is a welding one as well, wherein around the fixed mandrel (3) there is a non-closed restrictor (18), the foil (2) being situated between said restrictor and the external surface of the fixed mandrel, and the gap (20) of the non-closed restrictor (18) being intended for providing a contact between the mechanism (5) for pressing and welding and the overlapped ends (6) of the bent foil, the respective standard mechanism for removing of fabricated tube-packs from the shaping units (9m) being situated at the appropriate station to the M-step transfer mechanism (7).
5. A machine for making a tube-pack according to claim 4, characterized by the fact that it has a vertical common axis of the fixed mandrel (3) and movable mandrel (13).
6. A machine for making a tube-pack according to claim 4, characterized by the fact that it has a horizontal or inclined common axis of the fixed mandrel (3) and movable mandrel (13).
7. A machine for making a tube-pack according to claim 4, characterized by the fact that the mechanism for pressing and welding (5) is an induction or ultrasound one, or another appropriate known mechanism.
8. A machine for making a tube-pack according to claim 4, characterized by the fact that the welding unit (10) is an induction one, and the shaping unit (9) is made of dielectric material.
9. A machine for making a tube-pack according to claim 4, characterized by the fact that the welding unit (10) is an ultrasound one, and the shaping unit (9) is made of metal.
10. A machine for making a tube-pack according to claim 4, characterized by the fact that the M-step transfer mechanism (7) is a rotary-transfer or linear one, or one having an arbitrary planar trajectory of motion.
11. A machine for making a tube-pack according to claim 4, characterized by the fact that the shape of the movable mandrel (13) may be other than cylindrical.
12. A machine for making a tube-pack according to claim 4, characterized by the fact that the movable mandrel (13) should have a through conduit (24) for feeding a gas under pressure into the zone of welding the tube head (12) to the tube-pack body.
13. A machine for making a tube-pack according to claim 11, characterized by the fact that said gas is air.
14. A machine for making a tube-pack according to claims 4, 5 and 7 to 13, characterized by the fact that above the corresponding working seats (8) there are situated the following units: a standard unit for filling (21); standard unit for welding (22) the bottom of the tube-pack and its marking; standard unit for trimming the welded end; and standard unit for taking out the fabricated filled tube-pack.
PCT/BG2007/000010 2006-05-25 2007-05-22 Process and machine for making a tube-pack WO2007137374A1 (en)

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EP07719232A EP2021166A1 (en) 2006-05-25 2007-05-22 Process and machine for making a tube-pack

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IN804/MUM/2006 2006-05-25
IN804MU2006 2006-05-25

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CN110356009B (en) * 2019-07-22 2021-06-22 温州创荣超声波电子设备有限公司 Ultrasonic plastic welding machine for machining automobile parts

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101710A1 (en) 2002-05-30 2003-12-11 Unilever N.V. Process for the manufacture of a tube blank

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101710A1 (en) 2002-05-30 2003-12-11 Unilever N.V. Process for the manufacture of a tube blank

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