WO2004085137A1 - Procede et dispositif de positionnement et de soudage automatiques d'elements structuraux en plastique sur des segments en plastique plats - Google Patents

Procede et dispositif de positionnement et de soudage automatiques d'elements structuraux en plastique sur des segments en plastique plats Download PDF

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Publication number
WO2004085137A1
WO2004085137A1 PCT/CH2004/000166 CH2004000166W WO2004085137A1 WO 2004085137 A1 WO2004085137 A1 WO 2004085137A1 CH 2004000166 W CH2004000166 W CH 2004000166W WO 2004085137 A1 WO2004085137 A1 WO 2004085137A1
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WO
WIPO (PCT)
Prior art keywords
gripper
plastic
welding
rotation
axis
Prior art date
Application number
PCT/CH2004/000166
Other languages
German (de)
English (en)
Inventor
Joachim Bührer
Original Assignee
Sig Technology Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sig Technology Ltd. filed Critical Sig Technology Ltd.
Publication of WO2004085137A1 publication Critical patent/WO2004085137A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—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
    • 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
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • 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
    • 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
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7891—Means for handling of moving sheets or webs of discontinuously moving sheets or webs
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • 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
    • B29C66/73921—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 characterised by the materials of both parts being thermoplastics
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/737—Articles provided with holes, e.g. grids, sieves

Definitions

  • This invention relates generally to a method for automatic positioning and welding of plastic components on flat plastic sections or on plastic parts which have at least one flat section.
  • the invention is suitable for the automatic positioning and welding of plastic components in the form of pourers with a projecting edge on flat plastic sections in the form of sections of a perforated band.
  • the invention also relates to a device by means of which the method can be carried out.
  • plastic components in the form of pouring pieces, which are positioned on a flat plastic section in the form of a perforated band section and then have to be welded to it.
  • pourers are pouring spouts which have a radially outwardly projecting at their lower end, that is to say a cantilevered edge, with which they are welded in a liquid-tight manner to a pre-perforated piece of film, which is subsequently sealed or welded to a composite packing.
  • the pouring spouts often have an external thread, so that a threaded cap can be screwed onto them.
  • the composite packs to be filled with such pourers consist of film-coated paper and are used, for example, for packaging milk, fruit juices, all kinds of drinks or liquids in general from both the food and non-food sectors.
  • the pourers can also be used on composite packs in which bulk goods such as sugar, semolina, rice or all kinds of chemicals and the like are stored or packaged.
  • the film-coated paper is a laminate material, for example a paper or cardboard web coated with plastic such as polyethylene or aluminum. Usual volumes of such packs range from 20cl to 2 liters and more.
  • a piece of film with a pre-punched hole is glued or welded into one side of the package on one side of the composite package.
  • this piece of film provided with a hole must first be equipped with a pourer made of plastic, which is sealingly connected to this piece of film.
  • the object of the invention is now to generally equip such flat plastic sections in large quantities with plastic components, be it as a final step as well as for the production of semi-finished products, which are then fed to further processing of any kind.
  • the task is to equip perforated plastic film pieces with plastic components in the form of spouts, that is, to position and seal them so that the semi-finished product thus produced can subsequently be welded or glued into a composite package. Because billions of pieces of this type of composite packaging are required, the task is to fill the film pieces with pourers in as high a rate as possible and at the same time cost-effectively calls for extensive automation, and in addition automatic sealing and welding must also ensure the tightness between the pourer and the piece of film.
  • This object is achieved by a method for automatic positioning and welding of plastic components on a flat plastic section, in which the plastic components from a slideway for their supply from a handling device with an axis of rotation and at the end of two Y Gripping branches protruding in the form of grips are gripped with grippers arranged at the ends, the axis of rotation rotating back and forth by a rotation range of 180 ° and, in each end position of rotation, one gripper gripping a plastic component from a slideway while the other grips a previously gripped plastic.
  • the component is positioned on an intermittent sheet-like plastic section and held during welding by means of a welding device and then released.
  • a device for performing the method for automatically positioning and welding plastic components on a flat plastic section consisting of at least one slideway for feeding the individual plastic components, at least one associated handling device for gripping, positioning and holding the plastic components for their welding, at least one associated welding device and a conveying device for the flat plastic sections, the device being characterized in that each handling device has a motor-rotating axis of rotation and at one end two Y has gripping branches projecting in the form of grippers with grippers arranged at the ends, which can be extended or actuated pneumatically or electromagnetically, the axis of rotation being rotatable back and forth by a rotation range of 180 °, so that when a plastic is gripped -Component with one gripper through the other gripper, a plastic component can be positioned on the supplied flat plastic section and can thus be welded by the associated welding device.
  • each handling device has a motor-rotating axis of rotation and at one end two Y has gripping branches projecting in the form of grippers with grippers arranged at the
  • Figure 1 A plastic component in the form of a pouring spout, which in the picture from above is to be inserted into the hole of a flat plastic section underneath as part of a perforated tape and is to be welded with its overhang thereon, both parts being shown from obliquely below;
  • Figure 2 The entire device for the automatic positioning and welding of spouts with a cantilevered edge on a perforated belt in a perspective overall view, with all essential parts, namely the slideway for feeding the pourer, the handling device, the welding device and a conveyor for the perforated belt;
  • Figure 3 A single processing station of the device with the slideway for feeding the pourer and the associated handling device and welding device in an overall perspective view;
  • Figure 4 The handling device seen in a view from the side, with some parts omitted to give a clear view of the essential parts;
  • Figure 5 An enlarged view of section A of Figure 2, omitting the mounting plate and clearing the view of the parts behind;
  • Figure 6 The handling device in an oblique perspective view seen the side of the feed of the perforated tape
  • FIG. 7 Some snapshots of the foil strip to be fitted with pourers, with the pourers gradually inserted and welded, shown below one another.
  • a pourer 1 shows, as a plastic component 1 to be positioned and welded on, a pourer 1 as a fitting for a flat plastic section in the form of a perforated piece of film 2, which is then later used in a composite package. Both parts are shown here seen obliquely from below.
  • This pourer 1 is inserted in the upside-down position shown and in the direction of the arrow drawn into the hole in the plastic section below and afterwards its projection 5 is welded to the same in a sealing manner as that shown in the hole to the left.
  • the plastic section is here part of an endlessly fed perforated band which, after the insertion of such a spout 1, moves to the left as indicated by the arrow.
  • the pourers can be read interchangeably with plastic components of any shape, just as a perforated band section can be read interchangeably with a flat plastic section, which can also be part of a plastic part, which as a whole is not flat, but at least one Has flat section that is accessible from both sides.
  • This pourer 1 consists of a plastic pouring spout 3 with an external thread 4 and a radially projecting edge 5.
  • the pourer 1 shown here has, as a special feature, a projection 5 which is circular in the lateral region 6 here and from there on both sides into a straight edge section 7 passes.
  • the projection 5 forms two mutually parallel boundary surfaces 8 at the front and rear.
  • Two welding grooves 9 are formed on the upper side of the projection 5 facing the nozzle 3, which serve as a material reserve during ultrasonic welding as welding material to be liquefied.
  • its outer curve is interrupted by two opposing chamfered surfaces 10.
  • this spout shows a section of a film strip 2, which is provided in its longitudinal center with holes 11 of the same distance, which can be produced, for example, by punching.
  • a pourer 1 is therefore to be inserted into each of these holes 11 from above, and this is then to be sealed with the foil strip 2 in a sealing manner.
  • the present method and the device for carrying it out provide a solution to this problem, which is described and explained below.
  • FIG. 2 shows the entire device for applying and welding plastic components, here spouts, onto a flat plastic section, here in the form of a perforated foil strip, in a perspective overall view.
  • the essential parts are shown with partial omission of components in order to make the basic structure and function of the device understandable.
  • a conveyor device 20 for passing or perforating a perforated film strip On the left side of the picture there is a conveyor device 20 for passing or perforating a perforated film strip.
  • This consists of two rollers 21, 22 rolling in opposite directions, which can be driven by a motor and roll through the film strip or the flat plastic sections between them and thereby pull them towards the conveyor device 20.
  • the film strip is therefore pulled past the entire device from right to left.
  • the film strip itself of which a section is shown in FIG.
  • a plastic strip of approximately 5 to 15 cm in width which, rolled up into large rolls, includes many meters in one piece.
  • Such a film tape roll can measure 1 to 2 meters or more in diameter and contain a correspondingly large length of film web.
  • This film tape roll is outside the image, but on the right side of the device here.
  • the foil tape is unrolled from a roll holder arranged there and thus reaches the device from the right in the picture.
  • the film strip is guided between two rails 23, 24, which are equipped with mutually directed grooves 25, 26, in which the two edges of the film web are guided.
  • a punching device 30 can be seen, which will not be dealt with in detail because the punching of holes 11 in a foil strip 2 does not include anything spectacular that does not belong to the prior art.
  • Holes 11 spaced apart from one another are punched out of the center of the film web, which holes 11 are dimensioned such that they accommodate the nozzles of the pourers 1 or fittings to be welded in.
  • the holes 11 are punched into the film web 2 at such intervals that subsequent cutting between two successive holes to obtain uniformly long sections results in sufficiently large pieces of film which can be welded or glued into a composite package.
  • the punching device 30 is designed here in such a way that two holes lying next to one another are punched and the tape is then advanced by two distances, so that a chain of holes 11 is formed with the same distance in each case.
  • the entire device is designed here in such a way that two pourers 1 are welded to the perforated film web 2 at the same time, which of course doubles the capacity compared to only one processing station 40.
  • the image shown here shows only a single processing station 40 of these two processing stations, and this only with the omission of individual mounting plates and parts, in order to expose a clearer view of the handling device 50 and welding device 80. The exact same processing station must be imagined to be installed on the left of the station 40 shown at position 46.
  • a sensor apparatus 31 which scans the perforated film strip 2 conveyed to the left by means of optical light scanners, so-called print mark readers, perpendicular to the plane of the strip and thus detects it optically.
  • These light scanners make it possible to determine the position of the respective front 32 and rear edge 33 of a punched hole 11, as these edges are numbered in FIG. 1.
  • the conveyor 20 is controlled on the basis of this information.
  • the tape is pulled two hole intervals apart, and then stopped for an adjustable period of time, for which a central PLC control is provided, which also controls all other functions of the device.
  • the perforated foil strip 2 thus moves past the processing stations 40 from a handling device 50 and a welding device 80, in each case by two hole spacings.
  • the pourer 1 or fittings to be welded onto the perforated foil strip 2 or perforated strip come from an automatic spraying machine and are subsequently fed from a funnel-shaped container to the handling device 50.
  • This container is designed as a vibration conveyor and has along its inner wall a helically rising ramp, on which the pourers 1 move upwards due to the electromagnetically controlled vibration movement. They are brought into the desired position with mechanical locks and straightening elements, pourers 1 which do not have the correct position being separated out and falling back into the container.
  • the slideway 70 has a downward slope from the horizontal of 60 °, so that the pourers 1 held thereon slide downward due to gravity and are therefore fed to the handling device 50.
  • the handling device 50 grips the bottom spout 1 in the slide 70 and then moves it into the welding position on the perforated film strip, as will be described in more detail. In addition, the handling device 50 then holds the pourer during the actual welding and then releases it again and retracts so that the film strip can be conveyed further.
  • the welding device 80 is arranged below the two rails 23, 24 for conveying the film strip.
  • This essentially consists of an ultrasound welding device, that is to say of a sonotrode 81, which is mounted on its own, pneumatically actuated slide 83 vertically to the rails 23, 24 is movable up and down, the slide 83 in turn being guided on a moving part which can be moved mechanically up and down.
  • the sonotrode 81 has a tubular end at the top, with which the nozzle 3 of a spout 1 can be slipped on.
  • the sonotrode 81 is set into electrical ultrasound oscillation of approximately 20 kHz by a converter arranged below it, the oscillation amplitude being amplified by a booster.
  • FIG. 3 shows a single processing station 40 with a slideway 70 for feeding the pourer 1, a handling device 50 and welding device 80 separately in an overall perspective view. Some components have been omitted from the illustration to reveal the essential parts that will now be described.
  • the processing station 40 is constructed on a box-like frame with two vertical side plates 41, 42 and a few cross struts 43-45. In this frame, that is between the side plates 41, 42, the feed device for the pourer is installed, which includes a slideway 70 inclined downward by 60 °, on which the pourer 1 upside down on the two boundary surfaces 71, 72 with their projections in grooves are led.
  • a tubular impeller with a return spring 76 is then pneumatically, electromagnetically, or likewise by means of a servo motor and cams by means of an impeller device 62 Stub protruding from the bottom until it stops on the side of the projection there and the pourer on the projection over the gripper mandrel, after which the gripper bolts of the gripper extend radially and clamp the pourer on the inside of the nozzle.
  • the upper cross pin is pushed back between the two foremost pourers and after the lower cross pin has been pulled back, it is released to slide against the lower stop, from where it then passes from the handling device 50 to its gripper by the push-on device of the push-on device 62 is clamped by the gripper bolts of the gripper and is lifted away from the handling device 50.
  • the handling device 50 itself consists of an axis of rotation 51 arranged at an oblique angle, which is inclined here by 30 ° with respect to the vertical axis 52.
  • the axis of rotation 51 is rotatably mounted on a bracket 55 which is displaceable up and down relative to the frame of the entire device.
  • the holder 55 is attached to guide elements 57 on both sides, which are displaceably guided on a vertical rod 56.
  • the axis of rotation 51 branches at its lower end in a Y-shape into two gripper branches 53, 54, which form an angle of 120 ° between them.
  • Each gripper latch 53, 54 is equipped with a gripper which is provided with radially extending gripper bolts, each of which has a pressing surface in the form of a cylinder outer wall piece.
  • the vertical axis 52 on the device acts as a drive axis and thus rotates in its storage.
  • a stationary electrical and PLC-controlled servo motor 58 by means of which the axis 52 can be rotated in a controlled manner.
  • This axis 52 is equipped with a spur gear 59, which is in the teeth of a crown engages wheel 60 which is mounted on the axis of rotation 51 arranged at an oblique angle to the axis 52.
  • a rotary feedthrough 61 for the pneumatics and electrics of the grippers is attached, with connections for the electrical cables and for the pneumatic pressure hoses.
  • the pneumatic hoses and cables lead from this rotary union 61 to the grippers and the associated sensors.
  • the gripper bolts can be extended radially by means of the pneumatic pressure.
  • the grippers are either pushed back by the pneumatics by reversing the direction of action and are then exclusively pneumatically operated, or they are pulled back by springs towards the center of the grippers, so that in this case their pneumatic actuation takes place against a spring force, which resets them Ensures the absence of pneumatic pressure.
  • the actuation of the grippers i.e. the radial extension and retraction of their gripper bolts, can alternatively also be carried out electromagnetically.
  • the grippers are equipped with optical or inductive sensors, so that they detect the position of the gripper bolts as well as optionally the presence of a pouring spout at any time and report them to the central PLC control.
  • the vertical lifting of the entire handling device 50 and its subsequent lowering takes place by means of a mechanical drive device which is not visible here.
  • a mechanical drive device which is not visible here.
  • This includes an eccentric which is located on the outside of a horizontal shaft which is arranged in the upper region of the processing station 40 and is driven by a servo motor controlled by the PLC control.
  • the eccentric is connected to a connecting rod and a lifting rod, which raises and lowers the entire handling device 50 when the eccentric rotates.
  • the horizontal shaft is connected via a toothed belt drive to a further horizontal shaft arranged in the lower region of the processing station, as a result of which the rotations of these two shafts are synchronized.
  • the lower shaft also carries one at its same outer end Eccentric, which is connected to a connecting rod and raises and lowers a moving frame 82 via a further lever linkage, on which the carriage 83 with welding device 80 and its sonotrode 82 is attached.
  • the carriage 83 is mounted on the carriage 82 in a pneumatically displaceable manner and, if required, that is to say during the welding process, is pushed up pneumatically. This enables the contact pressure and contact time for the ultrasonic welding to be varied and adapted to the circumstances.
  • the sonotrode 82 has to follow a fraction of a millimeter during the welding due to the melting of the welding grooves.
  • the handling device 50 is raised against gravity on the one hand and the welding device 80 is lowered downwards on the other hand and vice versa.
  • the speed of the shafts and their eccentrics is coordinated by the central PLC control with the movements of the handling device 50 and welding device 80, and these movements will be described in detail later.
  • the one gripper catch 54 is directed backwards with its gripper and is just ready to receive a new pourer, namely the pourer previously slid into the stop position 70 in the slideway. This is then pushed by the non-visible push-up device with a return spring 76 of a push-on device 62 from below over the gripper, after which the spout is gripped by the gripper by the pneumatically actuated radial extension of the gripper bolts inside the spout nozzle 3 of the spout 1.
  • the other gripper tab 53 with its gripper is directed forward and projects vertically downward, where it previously inserted a pourer into a hole in the perforated film web 2 indicated here by dashed lines and now holds it there for welding.
  • the handling device 50 is shown in a view seen from the side, that is, in relation to the illustration in Figure 3 seen from the left side there on the side plate 41, wherein this side plate 41 is omitted here and further parts are omitted to reveal the essential parts.
  • the sonotrode 81 of the welding device 80 has also been extended to its uppermost position, and thus the film web, to which its level is indicated here with the line 65, together with that of the Gripper 63 used pourer pneumatically compressed.
  • the film web is conveyed towards the viewer in cycles perpendicular to the plane of the drawing sheet.
  • the spout held by the gripper 63 is welded by the sonotrode 81, which is pushed up pneumatically, being set into an ultrasonic oscillation at approximately 20 kHz, as a result of which the frictional heat melts the gripper cantilever with the edge of the punched hole in the film web.
  • the sonotrode 81 moves back on its slide 83.
  • the entire handling unit 50 apart from the drive axis 52 and its stationary servo motor 58, i.e. the entire axis of rotation 51 arranged at an oblique angle, is raised by approx.
  • the axis of rotation 51 driven by the servo motor 58, is rotated via the spur gear 59 and the crown gear 60, specifically by 180 °.
  • the rear gripper 64 is pivoted forward and the front gripper 63 is pivoted rearward, that is, the positions of the two grippers 63 and 64 are interchanged.
  • the perforated film web is conveyed one hole distance, in the case of two processing stations arranged in series, two hole distances, so that again a free hole is under the gripper - now under the gripper 64, which is now at the front and below.
  • the axis of rotation 51 is then lowered again at the same time the welding device 80 is raised 82 with its method.
  • the gripper 64 pushes the pourer previously gripped upside down into the hole in the film strip below it, the pouring spout being inserted into the sonotrode 81. Thereafter, it is moved pneumatically upwards on its slide 82, so that its upper edge then fits snugly around the pouring spout 3 from below on the film strip and presses it onto the projection 5 of the pourer 1. As soon as this condition is reached, the ultrasonic welding starts.
  • the pusher of the pusher device 62 has pushed a pourer onto the other gripper, now therefore onto the gripper 63, so that the gripper 63 now projects into a pourer, namely from its underside and in the end position of the pourer on the gripper 63, in which the underside of the projection of the spout rests on a shoulder-shaped anvil ring on the gripper 63.
  • the gripper bolts extend pneumatically radially and clamp the pourer or its pouring spout on the gripper 63.
  • the axis of rotation 51 is raised while simultaneously lowering the sonotrode 81, and then becomes the axis of rotation 51 turned back exactly 180 ° by which it was previously rotated. Again, the axis of rotation 51 is then lowered, the welding device 80 and its moving frame 22 are raised in opposite directions, and then the carriage 83 with the sonotrode 81 is pneumatically pressed upwards, and a new ultrasonic welding is carried out on the now lower gripper 63 and a new spout is made by gripped rear, upper gripper 64.
  • Each such cycle of the handling device 50 that is, from gripping a spout until it is welded to the film strip, lasts approximately 720 ms, that is, from a starting position of a gripper to the resumption of this starting position by the same gripper elapsing 1,440 ms.
  • this method and a corresponding device achieve a cadence of approx. 5,000 welds per hour; with a serial arrangement of two successive processing stations, the capacity increases to approx. 10,000 welds per hour with the film strip being conveyed in the same cycle to indicate an order of magnitude of the performance of this method and device.
  • 5 shows an enlarged view of section A from FIG.
  • the slideway 70 has a downward inclination from the horizontal of 60 °, so that the pourers 1 held on it slide downwards due to gravity and are therefore fed to the handling device 50 with its two gripper branches 53, 54 and the grippers 63, 64 attached to it.
  • the device 75 with the two mechanically actuable transverse bolts which are controlled by the PLC control and driven by a shaft with cam disks, push transversely into the slideway 70 to separate the pourers, as already described above.
  • This actuation of the cross bolts can, however, also be implemented pneumatically, with the retraction then taking place, for example, using return springs.
  • the lowermost pourer is pushed over the gripper positioned just above the slideway by the pusher of the pusher device 62, after which the gripper bolts extend radially and clamp the pourer on the gripper.
  • the gripper 63 which is located just below and in front here, shows the outside of the anvil he has formed, as well as the upper tubular end region of the sonotrode 81.
  • FIG. 6, which shows the handling device 50 in a perspective view obliquely to the side from which the perforated belt 2 is fed, which is indicated here with its conveying direction, provides further insight.
  • the rotating union 61 can be mentioned here, with its lateral connections 68, from which the pneumatic hoses and electrical cables lead to the grippers and their sensors.
  • a pressure hose is connected to connection 67 and the electrical cables to the PLC control are connected to other connections.
  • the extension position of the gripper bolts is monitored with inductive or optical sensors, the signals of which are reported to the PLC control via these cables so that it is always in the picture about the current position of the gripper bolts and optionally also whether a pourer is currently sitting on the gripper or not.
  • the PLC control can operate the radially extendable gripper bolts of the grippers 63, 64 as required and their position can be monitored by the sensors.
  • the shoulder 69 can still be seen, which acts as an anvil mandrel for the underside of the projection of a spout gripped by the gripper 63.
  • FIG. 7 finally shows a few snapshots of the foil tape to be fitted with pourers, for a better understanding of the assembly process when two processing stations 1, 11 are arranged in series, which then work synchronously with one another.
  • the film strip for schematization is shown from above, here it is conveyed from right to left, and the two processing stations I and II arranged next to one another or in series, which are spaced apart by three hole spacings in the film strip, are indicated schematically above them.
  • Figure 7a the situation is shown after the two processing stations I and II have each inserted a spout into the perforated film strip 2 and this is now equipped with a spout 1 at the corresponding points, from which the underside of its projection is shown here 5 sees.
  • FIG. 7a the situation is shown after the two processing stations I and II have each inserted a spout into the perforated film strip 2 and this is now equipped with a spout 1 at the corresponding points, from which the underside of its projection is shown here 5 see
  • FIGS. 7a) to 7b) show how far the pourers 1 that have just been used have shifted.
  • the two processing stations I and II have already filled the holes below them with a pourer 1 each.
  • the film strip is again conveyed through two hole spacings and reaches the position as shown in FIG. 7c).
  • the processing stations have already placed and welded a spout into the hole below them.
  • the film tape moves again two hole distances and presents itself as shown in Figure 7d). This process continues in the same way and ensures that all holes in the supplied film web are filled with pourers.
  • a handling device 50 which has an axis of rotation 51 and on its two Y-shaped projecting gripper branches 53, 54 with grippers 63, 64 arranged at the ends. The individual plastic components are then gripped alternately by these grippers 63, 64, the axis of rotation 51 rotating back and forth by a rotation range of 180 °.
  • the device for performing this method for automatically positioning and welding plastic components on a flat plastic section generally consists of at least one slideway for feeding the individual plastic components and at least one associated handling device for gripping, positioning and holding the Plastic components for welding them.
  • the or each handling device of this device has a motor-rotating axis of rotation and, at one end, two Y-shaped protruding gripper branches with pneumatically or electromagnetically actuable grippers arranged at the ends.
  • the axis of rotation can be rotated back and forth by a rotation range of 180 °, so that when a plastic component is gripped with one gripper by the other gripper, a plastic component can be positioned on the supplied flat plastic section and can thus be welded by the associated welding device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Des becs verseurs (1) sont saisis sur une piste de glissement (70) par un dispositif de manutention (50) qui est pourvu d'un axe de rotation (51) et qui comporte à son extrémité deux branches de préhension (53, 54) à écartement en Y dotées à leur extrémité d'organes de préhension (63, 64). L'axe de rotation (51) est tourné en cadence de 180° selon un mouvement de va-et-vient. Dans chaque position terminale de la rotation, l'un (64) des organes de préhension saisit un bec verseur de la piste de glissement (70) tandis que l'autre (63) place un bec verseur (1) préalablement saisi (1) sur une bande perforée (2) guidée de manière cadencée, retient ledit bec verseur lors du soudage à l'aide d'un dispositif de soudage (80) et libère ensuite ce bec verseur. La machine selon la présente invention est constituée de préférence de deux postes de traitement possédant chacun une piste de glissement (70) pour les becs verseurs à amener et à séparer (1), d'un dispositif associé de manutention (50) pour la préhension, le positionnement et la retenue des becs verseurs (1) en vue de leur soudage, et d'un dispositif de soudage (80). Chaque dispositif de manutention (5) possède un axe rotatif (51) entraîné par moteur, ledit axe possédant à l'une de ses extrémités deux branches de préhension (53, 54) à écartement en Y pourvues à leur extrémité d'organes de préhension (63, 64). Pendant la préhension d'un bec verseur (1) par l'un des organes de préhension, l'autre organe de préhension (63) place un bec verseur (1) sur la bande perforée (2).
PCT/CH2004/000166 2003-03-28 2004-03-19 Procede et dispositif de positionnement et de soudage automatiques d'elements structuraux en plastique sur des segments en plastique plats WO2004085137A1 (fr)

Applications Claiming Priority (2)

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CH5422003 2003-03-28
CH20030542/03 2003-03-28

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018405A1 (de) * 2005-04-20 2006-10-26 Robert Bosch Gmbh Antriebsvorrichtung für eine Siegelstation
EP2998103A1 (fr) * 2014-09-18 2016-03-23 Tetra Laval Holdings & Finance S.A. Unité et procédé permettant d'appliquer des dispositifs d'ouverture préformés sur une bande d'un matériau d'emballage
CN108638521A (zh) * 2018-05-28 2018-10-12 必诺机械（东莞）有限公司 一种超声波冲孔焊接设备
CN110171142A (zh) * 2019-05-24 2019-08-27 常州胜威塑料有限公司 一种塑料桶盖与油嘴自动焊接设备
CN110303515A (zh) * 2019-08-02 2019-10-08 唐山开元自动焊接装备有限公司 一种车桥加强圈和后盖搬运夹具
CN115384064A (zh) * 2022-09-21 2022-11-25 绍兴上虞创晟塑业有限公司 一种复合式水杯杯盖的超声波焊接机

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Publication number Priority date Publication date Assignee Title
US4905360A (en) * 1989-02-01 1990-03-06 Tachi-S Co., Ltd. Apparatus for forming vehicle seat
US5759319A (en) * 1994-10-04 1998-06-02 Portola Packaging, Inc. Apparatus and method for attaching fitments to cartons
US6085489A (en) * 1998-06-22 2000-07-11 Nimco Corporation Spout mandrel with energy ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905360A (en) * 1989-02-01 1990-03-06 Tachi-S Co., Ltd. Apparatus for forming vehicle seat
US5759319A (en) * 1994-10-04 1998-06-02 Portola Packaging, Inc. Apparatus and method for attaching fitments to cartons
US6085489A (en) * 1998-06-22 2000-07-11 Nimco Corporation Spout mandrel with energy ring

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018405A1 (de) * 2005-04-20 2006-10-26 Robert Bosch Gmbh Antriebsvorrichtung für eine Siegelstation
DE102005018405B4 (de) * 2005-04-20 2015-12-17 Robert Bosch Gmbh Antriebsvorrichtung für eine Siegelstation
EP2998103A1 (fr) * 2014-09-18 2016-03-23 Tetra Laval Holdings & Finance S.A. Unité et procédé permettant d'appliquer des dispositifs d'ouverture préformés sur une bande d'un matériau d'emballage
WO2016041827A1 (fr) * 2014-09-18 2016-03-24 Tetra Laval Holdings & Finance S.A. Unité et procédé d'application de dispositifs d'ouverture préformés sur une bande continue de matériau d'emballage
CN106536168A (zh) * 2014-09-18 2017-03-22 利乐拉瓦尔集团及财务有限公司 将预先形成的开启装置施加到包装材料卷材的单元和方法
CN108638521A (zh) * 2018-05-28 2018-10-12 必诺机械（东莞）有限公司 一种超声波冲孔焊接设备
CN110171142A (zh) * 2019-05-24 2019-08-27 常州胜威塑料有限公司 一种塑料桶盖与油嘴自动焊接设备
CN110171142B (zh) * 2019-05-24 2024-04-02 常州胜威塑料有限公司 一种塑料桶盖与油嘴自动焊接设备
CN110303515A (zh) * 2019-08-02 2019-10-08 唐山开元自动焊接装备有限公司 一种车桥加强圈和后盖搬运夹具
CN115384064A (zh) * 2022-09-21 2022-11-25 绍兴上虞创晟塑业有限公司 一种复合式水杯杯盖的超声波焊接机

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