CH434708A - Method and device for producing carrier bags from a plastic film tube and carrier bags produced by the method - Google Patents
Method and device for producing carrier bags from a plastic film tube and carrier bags produced by the methodInfo
- Publication number
- CH434708A CH434708A CH859366A CH859366A CH434708A CH 434708 A CH434708 A CH 434708A CH 859366 A CH859366 A CH 859366A CH 859366 A CH859366 A CH 859366A CH 434708 A CH434708 A CH 434708A
- Authority
- CH
- Switzerland
- Prior art keywords
- film tube
- welding
- reinforced
- zone
- fold
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000002985 plastic film Substances 0.000 title claims description 4
- 229920006255 plastic film Polymers 0.000 title claims description 4
- 238000003466 welding Methods 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000000071 blow moulding Methods 0.000 claims 2
- 239000008400 supply water Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010096 film blowing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B65D33/06—Handles
- B65D33/08—Hand holes
-
- 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
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
- B29C65/7441—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for making welds and cuts of other than simple rectilinear form
-
- 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
- B29C66/40—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
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
-
- 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
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0063—Cutting longitudinally
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/46—Knobs or handles, push-buttons, grips
- B29L2031/463—Grips, handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/86—Forming integral handles or mounting separate handles
- B31B70/876—Forming integral handles or mounting separate handles involving application of reinforcement strips or patches; involving reinforcements obtained by folding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Description
Verfahren und Vorrichtung zur Herstellung von Tragtaschen aus einem Kunststoff-Folienschlauch und nach dem Verfahren hergestellte Tragtaschen Die bekannten aus einem Folien schlauch hergestellte Tragtaschen mit ausgestanztem Trägerteil weisen nur eine sehr beschränkte Tragfähigkeit auf und können nur als Verpackungsmittel für leichte Gegenstände, wie z. B. für Textilien verwendet werden.
Weiter sind Tragtaschen mit an diesen angeschweissten Griffhenkel bekannt; sie haben aber den Nachteil verhältnismässig hoher Herstellungskosten. Zudem sind derartige Tragtaschen ebenfalls nur beschränkt tragfähig, da die Griffhenkel an den Schweissnähten leicht abreissen.
Die vorliegende Erfindung betrifft nun ein Verfahren zur Herstellung von Tragtaschen aus einer Kunststofffolie, nach welchem der Folienschlauch durch eine besondere Ringdüse der Folienschlauch-Blasanlage mit einer verstärkten Umfangszone versehen, an dieser Zone ein einbuchtender Längsfalz angeformt und dieser längs seiner Mittelfalzkante aufgetrennt wird, worauf an diesem verstärkten Randfalz mittels Schweiss-Schneidstem peln Traggriffe begrenzende Durctibrechungen angebracht werden.
Zur Ausübung dieses Verfahrens dient eine Folienschlauchblasanlage, deren Ringdüse einen durch partielle Ausschleifung der Ringmündung gebildeten, im Querschnitt erweiterten Teil aufweist und ferner ein über eine Wickelanlage an die Blasanlage anschliessender Schweissautomat mit einem Werkzeug zum Anformen und Aufschneiden eines einbuchtenden Längsfalzes in der verstärkten Zone des Folienschlauches, sowie mit übereinstimmenden, beheizten Schneidstempeln, welche von entgegengesetzten Seiten her mit einem gekühlten, in den Falz eingreifenden Gegendruckstück als Falzanform- und Aufschneidwerkzeug zusammenwirken.
Die nach dem Verfahren hergestellte Tragtasche weist einen sowohl verstärkten als auch doppellagigen Off- nungsrand mit einander gegenüberliegenden, als Traggriffe dienenden, im Schweiss-Stanzverfahren hergestellten Ausschnitten mit verstärktem Schweissrand auf.
Die erfindungsgemässe Tragtasche lässt sich billig und zudem in einer allen Beanspruchungen vollauf genügenden Ausführung hergestellen.
In der Zeichnung ist eine beispielsweise Ausführungsform der Vorrichtung zur Herstellung von Tragtaschen dargestellt, und zwar zeigt:
Fig. 1 eine Seitenansicht der Vorrichtung zum Anformen eines Längsfalzes an den Folienschlauch und zum Ausschweissen von Durchbrechungen von Traggrif- fen am Längsfalz,
Fig. 2 eine Draufsicht zu Fig. 1,
Fig. 3 eine Vorderansicht zu Fig. 1,
Fig. 4 eine Draufsicht auf den Folienschlauch-Blaskopf,
Fig. 5 ein Teilstück des zylindrisch geblasenen Folienschlauches,
Fig. 6 einen Teilquerschnitt durch den Folienschlauch in Bandform,
Fig. 7 einen Querschnitt durch eine erste Ausführungsform der aus dem Folienschlauch hergestellten Tragtasche nach der Linie VII-VII in Fig. 11, in grösserem Massstab,
Fig.
8 einen Querschnitt durch eine zweite Ausführungsform der aus dem Folienschlauch hergestellten Tragtasche nach der Linie VIII-VIII in Fig. 12 in grösserem Massstab,
Fig. 9 den bandförmigen Folienschlauch gemäss der ersten Ausführungsform nach dem Anbringen der Taschenrandschweissnähte und der Traggriffausstanzungen,
Fig. 10 den bandförmigen Folienschlauch der zweiten Ausführungsform nach dem Anbringen der Taschenrandschweissnähte und der Traggriffausstanzungen,
Fig. 11 die fertige Tragtasche der ersten Ausführungsform, und
Fig. 12 die fertige Tragtasche der zweiten Ausführungsform.
Zur Herstellung der Tragtasche dient eine Folienschlauch-Blasvorrichtung mit anschliessender Wickelanlage, eine Längsfaltenleg- und Traggriff-Schweiss Stanzvorrichtung, sowie eine in der Zeichnung nicht dargestellte an sich bekannte Tasdenrandschweiss- und Abschneidvorrichtung.
Die Folienschlauch-Blasvorrichtung weist einen auf einer bekannten Schneckenpresse angeordneten Folien schlauch-Blaskopf 1 (Fig. 4) mit einer Ringdüse 2 auf.
Die Ringdüse 2 besitzt im Gegensatz zu den bekannten Ringdüsen eine partielle Ausweitung 3 des ringförmigen Düsenschlitzes, welche einen stärkeren Materialfluss zwecks Erzeugung einer verstärkten Zone 5 (Fig. 5) am Folienschlauch 4 ermöglicht. Der mit dem Blaskopf 1 erzeugte Folienschlauch 4 wird in an sich bekannter Weise mittels im Folienschlauch eingeschlossener Druckluft durch einen an die Ringdüse 1 anschliessenden, in der Zeichnung nicht dargestellten, an sich bekannten Kühlring hindurchgezogen. Der am Kühlring erhärtete Folienschlauch 4 wird anschliessend zu einer Wickelanlage 6, 7, 8 (Fig. 1, 2) geführt, welche den für die Schlauchblähung mittels Druckluft erforderlichen Schlauchabschluss vermittelt.
Die an die Wickelanlage anschliessende Faltenlage und Traggriff-Schweiss-Stanzvorrich- tung weist auf der die Schlauchfolienverstärkung 5 enthaltenen Seite zwei mit ihrem Schneiden einander zugekehrte, elektrisch beheizte Schweiss-Stanzstempel 9, 10, sowie ein zwischen diesen liegendes wassergekühltes Gegendruckstück 11 auf, das mit einem keilförmigen Teil 12 in die verstärkte Folienpartie 5 einen eingebuchteten Falz 5' anbringt und mit einem vorn am keilförmigen Teil 12 vorgesehenen Messer 13 den Längsfalz 5' an seiner nach innen vorstehenden Mittelkante aufschneidet. Die Schweiss-Stanzstempel 9, 10 sind an U-förmigen Auslegern 14 angeordnet, welche ihrerseits in Elektromagneten 15 geführt sind. 16 und 16' sind in die Ausleger 14 eingebaute Kühlkörper.
Bei Erregung der Magnete 15 bewegen sich die Ausleger 14 und mit ihnen die Schweiss-Stanzmesser 9, 10, gegeneinander bzw. gegen das Gegendruckstück 11 und schweissen aus den verstärkten Falzen 5 des Folienschlauches 4 während eines kurzen Unterbruches der Transportbewegung des Folienschlauches eine Grifföffnung 17 heraus. Durch den Schweiss-Stanzschnitt wird die Grifföffnung 17 zugleich mit einem verstärkenden Randschweisswulst versehen.
Die beim Ausschneiden anfallenden Abfälle werden durch eine nicht gezeichnete Absaugvorrichtung entfernt.
An den Kühlkörper 16 ist die Kühlwasserleitung, 18 angeschlossen. Eine Kühlwasser-Verbindungsleitung 19 verbindet den Kühlkörper 16 mit dem teilweise als Hohlkörper ausgebildeten Gegendruckstück 11. Dieses wiederum ist durch einen Kühlwasser-Verbindungsschlauch 20 mit dem Kühlkörper 16' verbunden, an welchen der Wasserableitungsschlauch 21 angeschlossen ist. Das Gegendruckstück 11 ist an einer Konsole 22 eines Ständers 23 befestigt. An der Konsole 22 ist eine Umlenkwalze 24 gelagert, über welche der am verstärkten Falz 5 aufgeschnittene und mit den Traggriffausstanzungen 17 versehene Folienschlauch 4 zu einer bekannten Fertigungsvorrichtung geführt wird, in welcher der Folienschlauch 4 mit den Taschenrand-Schweissnähten 25 versehen wird und zugleich an diesen längs der Mittellinie 25' entzweigeschnitten und in einzelne Taschen 26 bzw. 26' gemäss Fig. 11 und 12 zerlegt wird.
Zur Herstellung von Tragtaschen mit Bodenfalz 4' gemäss Fig. 8 und 12 ist lediglich die Anordnung eines zweiten Faltenlegkeiles auf der dem Keil 12 gegenüberliegenden Seite notwendig. Bei der Herstellung des Folienschlauches durch die Ringdüse 1 wird der unter Wirkung von Druckluft aus dem Düsenkopf sich erweiternde Folienschlauch 4 am Kühlring verfestigt. Der verfestigte Folienschlauch wird nach oben gezogen und unter Flachlegung über die Walzen 6, 7, 8 der Wickelanlage geführt, welche den Abschluss des Folienschlauches zwecks Erhaltung des in ihm vorhandenen Luftpolsters bildet.
Der an die Wickelanlage anschliessende Falzkeil 12 der Schweiss-Stanzvorrichtung 9, 10, 11 bewirkt die Erzeugung eines eingebuchteten Falzes 5' an der verstärkten Zone, und gegebenenfalls durch einen weiteren Falzlceil auf der gegenüberliegenden Seite die Erzeugung eines Bodenfalzes 4'. Das am Falzkeil 12 angeordnete Messer 13 schneidet den Falz 5' an seiner Innenkante auf.
Während eines kurzen Unterbruches der Transportbewegung des Folienschlauches 4 wird durch Erregung der Elektromagnete 15 die Stanzbewegung der Schneidsternpel 9, 10 erzeugt, durch welche die Traggriffausschnitte 17 in der verstärkten und gefalzten Zone des Folienschlauches erzeugt werden. Zum Schluss werden in einer Fertigungsvorrichtung die Taschenrand-Schweissnähte 25 angebracht, wobei zugleich die Abtrennung in einzelne Taschen erfolgt.
Die Traggriffausschnitte 17 weisen nach Fig. 11 und 12 Trapezform auf, wobei die längere Seite der Ausschnitte unten liegt, d.h. dem Taschenboden zugekehrt ist. Diese Formgebung gewährleistet in Verbindung mit den Randwulsten grosse Widerstandsfähigkeit gegen Rissbildung an den Griffausschnitten.
Method and device for the production of carrier bags from a plastic film tube and carrier bags produced by the method. The known carrier bags made from a film tube with punched-out carrier part have only a very limited load capacity and can only be used as packaging means for light objects, such as. B. used for textiles.
Carrying bags with handle handles welded to these are also known; but they have the disadvantage of relatively high manufacturing costs. In addition, such carrier bags also have only limited load-bearing capacity, since the handle handles easily tear off at the weld seams.
The present invention relates to a method for the production of carrier bags from a plastic film, according to which the film tube is provided with a reinforced circumferential zone by a special ring nozzle of the film tube blowing system, an indented longitudinal fold is formed on this zone and this is separated along its central fold edge this reinforced edge fold by means of welding cutting stamps peln carrying handles limiting Durctibrechungen be attached.
This process is carried out using a tubular film blowing system, the ring nozzle of which has a part that is enlarged in cross-section and formed by partially grinding out the ring mouth, and also an automatic welding machine with a tool connected to the blowing system via a winding system for forming and cutting open a longitudinal fold in the reinforced zone of the tubular film , as well as with matching, heated cutting punches, which cooperate from opposite sides with a cooled counter-pressure piece engaging in the fold as a fold forming and cutting tool.
The carrier bag produced according to the method has a reinforced as well as a double-layered opening edge with mutually opposite cutouts which are used as carrying handles and are produced in the welding-punching process with a reinforced welding edge.
The carrying bag according to the invention can be manufactured cheaply and, moreover, in a design that is fully sufficient for all demands.
In the drawing, an example embodiment of the device for the production of carrier bags is shown, namely shows:
1 shows a side view of the device for forming a longitudinal fold on the film tube and for welding openings of carrying handles on the longitudinal fold,
FIG. 2 is a plan view of FIG. 1,
3 shows a front view of FIG. 1,
4 shows a plan view of the film tube blow head,
5 shows a section of the cylindrically blown film tube,
6 shows a partial cross section through the film tube in tape form,
7 shows a cross-section through a first embodiment of the carrier bag made from the film tube along the line VII-VII in FIG. 11, on a larger scale,
Fig.
8 shows a cross-section through a second embodiment of the carrier bag made from the film tube along the line VIII-VIII in FIG. 12 on a larger scale,
9 shows the strip-shaped film tube according to the first embodiment after the pocket edge weld seams and the handle punch-outs have been made,
10 shows the band-shaped film tube of the second embodiment after the pocket edge weld seams and the handle punch-outs have been made,
11 shows the finished carrier bag of the first embodiment, and FIG
12 shows the finished carrier bag of the second embodiment.
A film tube blowing device with subsequent winding system, a longitudinal folding and carrying handle welding punching device, as well as a pocket edge welding and cutting device known per se (not shown in the drawing) are used to produce the carrying bag.
The film tube blowing device has a film tube blow head 1 (FIG. 4) with an annular nozzle 2, which is arranged on a known screw press.
In contrast to the known ring nozzles, the ring nozzle 2 has a partial widening 3 of the ring-shaped nozzle slot, which enables a stronger material flow for the purpose of producing a reinforced zone 5 (FIG. 5) on the film tube 4. The film tube 4 generated with the blow head 1 is drawn in a known manner by means of compressed air enclosed in the film tube through a known cooling ring, not shown in the drawing, connected to the annular nozzle 1. The film tube 4 hardened on the cooling ring is then led to a winding system 6, 7, 8 (FIGS. 1, 2), which provides the tube closure required for the tube to be inflated by means of compressed air.
The fold layer and carrying handle welding punching device adjoining the winding system has, on the side containing the tubular film reinforcement 5, two electrically heated welding punching punches 9, 10 facing each other with their cutting, as well as a water-cooled counter-pressure piece 11 located between these a wedge-shaped part 12 in the reinforced film section 5 makes an indented fold 5 'and, with a knife 13 provided at the front of the wedge-shaped part 12, cuts the longitudinal fold 5' at its inwardly protruding central edge. The welding punches 9, 10 are arranged on U-shaped arms 14, which in turn are guided in electromagnets 15. 16 and 16 'are heat sinks built into the boom 14.
When the magnets 15 are excited, the arms 14 and with them the welding punching knives 9, 10 move against each other or against the counter-pressure piece 11 and weld a grip opening 17 out of the reinforced folds 5 of the film tube 4 during a brief interruption of the transport movement of the film tube . The grip opening 17 is at the same time provided with a reinforcing edge weld bead as a result of the welded punch cut.
The waste resulting from cutting is removed by a suction device, not shown.
The cooling water line, 18 is connected to the cooling body 16. A cooling water connection line 19 connects the heat sink 16 to the counter-pressure piece 11, which is partially designed as a hollow body. This in turn is connected by a cooling water connection hose 20 to the heat sink 16 ', to which the water drainage hose 21 is connected. The counter-pressure piece 11 is attached to a bracket 22 of a stand 23. A guide roller 24 is mounted on the console 22, via which the film tube 4 cut open at the reinforced fold 5 and provided with the handle punch-outs 17 is guided to a known manufacturing device in which the film tube 4 is provided with the pocket edge weld seams 25 and at the same time on these is cut in two along the center line 25 'and divided into individual pockets 26 and 26' according to FIGS. 11 and 12.
To produce carrier bags with a bottom fold 4 'according to FIGS. 8 and 12, only the arrangement of a second folding wedge on the side opposite the wedge 12 is necessary. During the production of the film tube through the ring nozzle 1, the film tube 4, which expands under the action of compressed air from the nozzle head, is solidified on the cooling ring. The solidified film tube is pulled upwards and laid flat over the rollers 6, 7, 8 of the winding system, which forms the end of the film tube for the purpose of maintaining the air cushion in it.
The folding wedge 12 of the welding / punching device 9, 10, 11, which adjoins the winding system, creates an indented fold 5 'in the reinforced zone and, if necessary, a further fold on the opposite side creates a bottom fold 4'. The knife 13 arranged on the folding wedge 12 cuts the fold 5 'on its inner edge.
During a brief interruption in the transport movement of the film tube 4, the excitation of the electromagnets 15 generates the punching movement of the cutting star 9, 10, by which the handle cutouts 17 are produced in the reinforced and folded zone of the film tube. Finally, the pocket edge weld seams 25 are applied in a manufacturing device, with the separation into individual pockets taking place at the same time.
The handle cutouts 17 are trapezoidal in shape as shown in Figures 11 and 12, with the longer side of the cutouts at the bottom, i. is facing the bottom of the bag. In conjunction with the beaded edges, this shape ensures great resistance to cracking at the handle cutouts.
Claims (1)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH859366A CH434708A (en) | 1966-06-10 | 1966-06-10 | Method and device for producing carrier bags from a plastic film tube and carrier bags produced by the method |
| AT676666A AT300332B (en) | 1966-06-10 | 1966-07-14 | Method and device for the production of carrier bags |
| DE19661629237 DE1629237B2 (en) | 1966-06-10 | 1966-11-01 | METHOD FOR MANUFACTURING CARRYING BAGS FROM PLASTIC FILM |
| DEW38876U DE1964455U (en) | 1966-06-10 | 1967-01-13 | DEVICE FOR MANUFACTURING CARRYING BAGS FROM A PLASTIC FILM TUBE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH859366A CH434708A (en) | 1966-06-10 | 1966-06-10 | Method and device for producing carrier bags from a plastic film tube and carrier bags produced by the method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH434708A true CH434708A (en) | 1967-04-30 |
Family
ID=4342381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH859366A CH434708A (en) | 1966-06-10 | 1966-06-10 | Method and device for producing carrier bags from a plastic film tube and carrier bags produced by the method |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT300332B (en) |
| CH (1) | CH434708A (en) |
| DE (2) | DE1629237B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992003341A1 (en) * | 1990-08-24 | 1992-03-05 | Deutsche Rockwool Mineralwoll-Gmbh | Device for wrapping a packaging unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3741210A1 (en) * | 1987-12-04 | 1989-06-15 | Detlef M Kuehnert | METHOD FOR THE PRODUCTION OF SHRINK HOODS, DEVICE FOR CARRYING OUT THEREOF AND SHRINK HOOD |
-
1966
- 1966-06-10 CH CH859366A patent/CH434708A/en unknown
- 1966-07-14 AT AT676666A patent/AT300332B/en not_active IP Right Cessation
- 1966-11-01 DE DE19661629237 patent/DE1629237B2/en active Pending
-
1967
- 1967-01-13 DE DEW38876U patent/DE1964455U/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992003341A1 (en) * | 1990-08-24 | 1992-03-05 | Deutsche Rockwool Mineralwoll-Gmbh | Device for wrapping a packaging unit |
Also Published As
| Publication number | Publication date |
|---|---|
| AT300332B (en) | 1972-07-25 |
| DE1629237B2 (en) | 1972-10-19 |
| DE1964455U (en) | 1967-07-20 |
| DE1629237A1 (en) | 1972-02-17 |
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