US20150307235A1 - Plastic closure device for tubular bags - Google Patents

Plastic closure device for tubular bags Download PDF

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Publication number
US20150307235A1
US20150307235A1 US13/635,704 US201113635704A US2015307235A1 US 20150307235 A1 US20150307235 A1 US 20150307235A1 US 201113635704 A US201113635704 A US 201113635704A US 2015307235 A1 US2015307235 A1 US 2015307235A1
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United States
Prior art keywords
energy
introducing
closure device
flange
plastic closure
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.)
Abandoned
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US13/635,704
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English (en)
Inventor
Tom Docherty
Dan Barron
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of US20150307235A1 publication Critical patent/US20150307235A1/en
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARRON, DAN
Abandoned legal-status Critical Current

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    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • 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
    • 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
    • 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
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • 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
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • B29C66/4742—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat said single elements being spouts
    • B29C66/47421—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat said single elements being spouts said spouts comprising flanges
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5877—Non-integral spouts connected to a planar surface of the package wall
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges

Definitions

  • the present invention describes a plastic closure device for tubular bags, having a bottom part, comprising a discharge outlet and a flange having a flange bottom side on which there is disposed an energy-introducing arrangement which can be connected to a plastic layer by means of ultrasonic welding.
  • Plastic closure devices for tubular bags which in technical language are generally referred to as pouches, are known in different embodiments.
  • the plastic closure devices generally comprise a bottom part, fastened directly on the tubular bag, and a screw cap, releasably fastenable on the bottom part, for closing off a discharge outlet in the bottom part.
  • a flange of the bottom part is fastened on the plastic film material of the tubular bag in a non-releasable, integral manner by ultrasonic welding. This welded joint is realized either directly between the flange bottom side and the plastic film of the tubular bag, or between the flange bottom side and a plastic patch which closes a punched opening in the plastic film of the tubular bag.
  • the ultrasonic welding of plastic in the region of a joining zone of the flange as the weldment by means of a sonotrode leads to the non-releasable connection of the flange to the tubular bag or the plastic patch.
  • the sonotrode is pressed with a defined joining force against a so-called anvil. This anvil is not represented in the figures.
  • an energy-introducing rib which runs all the way round the flange, has been disposed on the bottom side of the flange.
  • an energy-introducing rib which is as blunt as possible and points with a flat face in the direction of the tubular bag and which withstands the high static joining forces that are necessary for optimal welding, has been provided.
  • the energy-introducing rib is made as blunt as possible with sufficient thickness, so that the static joining force can be evenly applied to as large a surface area as possible.
  • the mechanical ultrasonic vibrations are transferred under pressure to the flange in the region of the energy-introducing rib, wherein, by molecular and boundary friction, the heat which is necessary for the plasticization of necessary heat is generated on the basis of pressure threshold loading and an approximately homogeneous welding of the surface of the energy-conducting rib in a large region ensues, in that the blunt energy-conducting rib is plasticized and provides a large-area connection.
  • the method according to the prior art delivers satisfactory results with low welding times, wherein, due to the thickness of the energy-introducing rib, a liquid-tight, large-area welding is achieved.
  • the efficiency of the fastening method is open to improvement, however, since a total power of several thousand Watts for the entire connecting operation by ultrasonic welding is necessary in order to achieve the desired liquid-tight, non-releasable connections.
  • the necessary static joining force in respect of film thicknesses of, say, 125 ⁇ m is about 400 N and must be applied, as far as possible, perpendicularly to the flange surface. Integral connections between the plastic closure device and the plastic film are thereby achievable in such strength that the connection withstands tensile forces of about 0.2 to 0.5 N/mm2.
  • a structured anvil was used.
  • the drawback of a structured anvil is the possibility that bacteria will hide in the structured surface, or that the structure of the anvil will damage the plastic film of the tubular bag, including next to the welding point.
  • the object of the present invention is to provide a plastic closure device which, in comparison to known plastic closure devices known from the prior art, can be fastened on the tubular bags by means of lower static joining forces, lower amplitudes, lower welding energies, and thus, in total, by means of lower welding powers. Due to the high quantities, a more cost-effective fastening of each individual plastic closure devices leads to enormous savings worldwide in the region of billions of dollars per annum.
  • FIG. 1 shows a perspective view of a two-part plastic closure device
  • FIG. 2 shows a view of the bottom side of the bottom part with the inventive energy-introducing arrangement.
  • FIG. 3 shows a longitudinal section through a plastic closure device with mounted sonotrode
  • FIG. 4 shows a sectional view of a detail of the flange in the region of the joining zone.
  • FIG. 5 a shows a diametrical vertical section through a bottom part, wherein the flange, in the outer marginal region after the outer energy-introducing rib, is of rounded construction, while
  • FIG. 5 b shows a section through a bottom part along the sectional line W-W according to FIG. 2 .
  • FIGS. 6 a and 6 b show a plastic closure device according to the prior art.
  • the inventive plastic closure device is denoted in its entirety by 1 and comprises a bottom part 2 onto which a screw cap 3 can be releasably fastened to form a seal.
  • the screw cap 3 can be fastened to the bottom part 2 by a guarantee band 4 as protection against prior opening, so that an intact guarantee band 4 is a sign of a plastic closure device 1 which has never previously been opened.
  • the bottom part 2 comprises a normally cylindrically shaped discharge outlet 22 , on the outer face of which is arranged an external thread 21 and which is delimited by a flange 20 .
  • the screw cap 3 has an internal thread (not represented), which can be brought into operative connection with the external thread 21 , whereby the plastic closure device 1 can be closed in a liquid-tight manner.
  • the bottom part 2 can also be provided with a hinged cap, or a piercing element disposed in the bottom part 2 . It is only important that the plastic closure device 1 should have a bottom part 2 with discharge outlet 22 and a peripheral flange 20 .
  • the bottom part 2 can be fastened directly or indirectly to a plastic film 5 , as shown in detailed representation in FIG. 3 , wherein the plastic film 5 constitutes a part of a tubular bag (not represented).
  • the tubular bag can be filled with different liquids, wherein the liquid can be extracted from the discharge outlet 22 from the tubular bag following the removal of the cap.
  • the opening in the tubular bag which is necessary beneath the discharge outlet 22 can be produced either by a corresponding device to the abovementioned piercing element, for instance, or can be made directly in the plastic film 5 of the tubular bag.
  • the bottom side 200 of the flange 20 which is facing away from the cap 3 , for instance a screw cap 3 , has an energy-introducing arrangement in the form of a plurality of energy-introducing ribs 23 , which skirt the round flange 20 and project away from the bottom side 200 of the flange 20 .
  • the energy-introducing ribs 23 are here preferably at least approximately parallel to one another and are arranged at such a distance from the inner diameter of the flange 20 or of the discharge outlet 22 that they lie outside the region of the cap 3 .
  • a non-releasable connection of the bottom part 2 to the plastic film 5 of the tubular bag is effected by means of ultrasonic welding.
  • a sonotrode 6 which is usually of rotationally symmetric configuration, is positioned on the flange top side 201 , which is facing away from the energy-introducing ribs 23 .
  • the sonotrode 6 is advantageously configured as a rotary sonotrode 6 , which has a receiving space 60 into which the bottom part 2 , where necessary with mounted cap 3 , can be received, while the bearing edge 61 of the sonotrode 6 has direct contact with the flange top side 201 .
  • the ultrasonic energy is introduced into the region of the joining zone Z at least approximately perpendicularly to the flange top side 201 , wherein the vibrational direction S of the sonotrode 6 is realized, say, longitudinally roughly parallel to the longitudinal axis of the bottom part 2 of the plastic closure device 1 .
  • the vibrational direction S of the sonotrode 6 is realized, say, longitudinally roughly parallel to the longitudinal axis of the bottom part 2 of the plastic closure device 1 .
  • an amplitude A high-frequency mechanical vibrations, generated by a connected generator, are realized, which vibrations correspond to the working frequency of the sonotrode 6 .
  • a static joining force F is applied at least approximately perpendicularly to the flange top side 201 during a welding time.
  • the static joining force F points roughly in the vibrational direction S.
  • the sonotrode 6 presses the bottom part 2 under the static joining force F against an anvil (not represented).
  • the contact points between the plastic film 5 and the flange 20 is or are heated, whereby the integral connection between the bottom part 2 and the tubular bag or plastic film 5 ensues.
  • the welded joint can be realized either directly between the flange bottom side 200 and the plastic film 5 of the tubular bag, or between the flange bottom side 200 and a plastic patch inside the tubular bag beneath the plastic film 5 of the tubular bag, wherein the ultrasonic vibration correspondingly introduces energy into the energy-introducing ribs 23 .
  • the joining force F persists for a dwell time, wherein the flange 20 and the plastic film 5 cools under pressure.
  • the plurality of energy-introducing ribs 23 should be arranged over a width b on the bottom side 200 , wherein the flange top side 201 , spanning the width b, should be fully covered during the welding operation by the bearing surface, here the edge 61 of the sonotrode 6 , in order to ensure an optimal energy input.
  • the energy-introducing ribs 23 should be arranged approximately parallel at a distance apart b′, wherein the energy-introducing ribs 23 and the flange bottom side 200 are distanced by a height h from the plastic film 5 .
  • the height h is determined by the distance between the flange bottom side 200 and the elevation maximum of the energy-introducing ribs 23 , and thus by the plastic film 5 which is to be welded on. Heights h of 0.2 to 0.4 mm were chosen.
  • the energy-introducing ribs 23 which in cross section are configured rounded into their end, have a radius r of 0.1 to 0.3 mm.
  • the elevation maxima of the energy-introducing ribs 23 in the form of domes give rise, viewed in cross section, to roughly punctiform bearing surfaces against the plastic film 5 .
  • the flanks of the energy-introducing ribs 23 enclose an angle ⁇ between 50° and 70°, preferably of 60°.
  • the domes of the energy-introducing ribs 23 lie beneath the flange bottom side 200 on circular bearing lines or narrow bearing surfaces.
  • the distance apart b′ of adjacent energy-introducing ribs 23 of the energy-introducing arrangement is chosen between 1 mm and 1.5 mm, depending on the flange width B and width of the bearing edge 61 of the sonotrode 6 , so that, in the case of three parallel, and thus non-intersecting energy-introducing ribs 23 , the width b of the energy-introducing arrangement is about 2.5 to 2.7 mm. Since thread flanks of the external thread 21 project partially over the flange top side 201 , the bearing edge 61 of the sonotrode 6 can usually be mounted onto the flange top side 201 such that it does not bear against the discharge outlet.
  • the edge 61 rests as flatly as possible on the flange top side 201 , lying opposite the energy-introducing arrangement on the flange bottom side 200 , wherein the ultrasonic energy can be optimally introduced by the sonotrode 6 into the flange 20 and the energy-introducing ribs 23 .
  • the sonotrode 6 In order to achieve a largest possible region of energy transfer to the flange 20 , the sonotrode 6 must be led as closely as possible past the thread flanks of the external thread 21 , so that a maximal contact surface on the flange top side 201 is covered.
  • the surface areas of the flange bottom sides 200 and flange top sides 201 of the known bottom part, as well as of the novel bottom part 2 were identical, so that the results are comparable.
  • Table 1 shows the direct comparison of the method parameters for fastening the known bottom part and the novel bottom part 2 respectively.
  • Table 2 shows a comparison of the tensile force for the removal of a welded-on plastic closure devices according to the prior art and an inventive plastic closure device 1 or the bottom part 2 , with the use of three energy-introducing ribs 23 .
  • the present configuration of the bottom part 2 was able to bring about an improvement in the previously known welding methods, so that an energy-efficient, integral connection of bottom parts 2 of plastic closure devices 1 with plastic films 5 of tubular bags can be achieved, which connection additionally ensures a still stronger and more resistant connection between the bottom part 2 and the tubular bag.
  • the strongly rounded marginal region Y of the flange 20 is distinguished by the fact that the bottom side 200 merges into the flange top side 201 , wherein the distance of the bottom side 200 to the plastic film 5 corresponds to the height h of the energy-introducing rib 23 only directly at the outer energy-introducing rib 23 .
  • the welding energy remains limited to the joining zone Z and thus no adhesion of the plastic film 5 occurs beneath the marginal region Y of the flange 20 .
  • this concentration of welding energy the necessary energy can be additionally reduced.
  • FIG. 5 b a section through the flange 20 along the sectional line W-W according to FIG. 2 is represented.
  • the bottom side 200 is curved after the outer, in this case second energy-introducing rib 23 strongly away from the plastic film 5 in the direction of the flange top side 201 , whereby the resulting marginal region Y after the outer energy-introducing rib 23 is strongly curved and is distanced from the plastic film 5 .
  • That surface area of the flange bottom side 200 which lies opposite the plastic film 5 is thus minimized, whereby almost no welding is performed in this marginal region Y.
  • the introduced energy is thus concentrated on the energy-introducing ribs 23 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Bag Frames (AREA)
US13/635,704 2010-03-18 2011-01-20 Plastic closure device for tubular bags Abandoned US20150307235A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102010003019.8 2010-03-18
DE102010003019 2010-03-18
DE102010003268A DE102010003268A1 (de) 2010-03-18 2010-03-25 Kunststoffverschlussvorrichtung für Schlauchbeutel
DE102010003268.9 2010-03-25
PCT/EP2011/050778 WO2011113629A1 (de) 2010-03-18 2011-01-20 Kunststoffverschlussvorrichtung für schlauchbeutel

Publications (1)

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US20150307235A1 true US20150307235A1 (en) 2015-10-29

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US13/635,704 Abandoned US20150307235A1 (en) 2010-03-18 2011-01-20 Plastic closure device for tubular bags

Country Status (4)

Country Link
US (1) US20150307235A1 (de)
EP (1) EP2547593B1 (de)
DE (1) DE102010003268A1 (de)
WO (1) WO2011113629A1 (de)

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US20210000580A1 (en) * 2018-02-26 2021-01-07 Argenta Innovation Limited Intra-ruminal device

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DE102011084508B4 (de) * 2011-10-14 2022-03-03 Syntegon Pouch Systems Ag Kunststoffverschlussvorrichtung für einen Schlauchbeutel
DE102013202766A1 (de) 2013-02-20 2014-08-21 Ms Spaichingen Gmbh Rundsonotrode
DE102013214134A1 (de) * 2013-07-18 2015-01-22 Novatec Gmbh Verfahren zur Herstellung einer Ultraschallschweißverbindung, Schweißvorrichtung zur Durchführung des Verfahrens und Sonotrode für das Verfahren bzw. die Schweißvorrichtung
JP6661535B2 (ja) 2013-11-12 2020-03-11 デュケーン・アイエイエス，エルエルシー 熱可塑性プラスチックの超音波溶接
EP3807080A1 (de) 2018-06-13 2021-04-21 Dukane IAS, LLC Verfahren zur bestimmung einer schmelzschichtdicke verbunden mit einer vorbestimmten schweissnahtfestigkeit basierend auf einer korrelation dazwischen
EP3835035A1 (de) * 2019-12-11 2021-06-16 Telsonic Holding AG Verfahren zum verbinden von werkstücken und zusammengesetzter gegenstand

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US6279779B1 (en) * 1999-10-01 2001-08-28 Tetra Laval Holdings & Finance S.A. Closable opening device for sealed packages of pourable food products

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JP2000016453A (ja) * 1998-06-29 2000-01-18 Toppan Printing Co Ltd 外付タイプ口栓
JP2000344264A (ja) * 1999-06-08 2000-12-12 Toppan Printing Co Ltd 開封刃内蔵口栓
US8075189B2 (en) * 2006-06-21 2011-12-13 Bosch Pouch Systems Ag Method for attaching a spout to a flexible film pouch

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US6279779B1 (en) * 1999-10-01 2001-08-28 Tetra Laval Holdings & Finance S.A. Closable opening device for sealed packages of pourable food products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210000580A1 (en) * 2018-02-26 2021-01-07 Argenta Innovation Limited Intra-ruminal device

Also Published As

Publication number Publication date
EP2547593B1 (de) 2015-03-18
EP2547593A1 (de) 2013-01-23
DE102010003268A1 (de) 2011-09-22
WO2011113629A1 (de) 2011-09-22

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