DE1561451A1 - Apparatus for manufacturing packaging bags, in particular stocking bags - Google Patents

Description

Dipl.-tni.

Stuttgart.". IftfMtaml 40 '

156U51

P 15 61

Siegfried Leonhardt Stuttgart-Botnang '-. Bruckner3tr, 57 A 29 671 - sz

. 1st August 1969

Device for the production of Verpaokungebucheln «in particular Stocking bags

The invention relates to a device sum Berstellen of packaging bags, especially stocking bags " made of a folded film made of thermoplastic material, with a feed track for the example Foil pulled off a roll and with a separating device located in the area of the feed path zrcei lying on both sides of the feed plane, relative mutually movable bars «behind and in front of which - in relation to the feed direction - means of transport, how powered rollers are provided for the mad.

In known devices of this type, the film after carrying out a Xrenneobweieung to their »free

With the help of a transport roller through the Trennechweißeinriohtuhg until it is from the in

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Pre-stroke direction behind the cut-off welding device lying next transport rollers is detected and can then be pulled again .. The disadvantage of this training ' Above all, lies in the fact that relatively stiff or thick foils must be used * to ensure » that the end of the film is lying in the feed direction behind the separating tube when it is fed into the feed direction Means of transport arrives. It has been shown, however, that even with relatively stiff foils, there is no grain a perfect feed is guaranteed in this way. Another disadvantage of the known devices consists in »that the production of the weld seams by touching the foil with a corresponding heated one Rod is carried out. This often results in a Heavy smoke development, which can also result in warped and poorly holding weld seams. The known devices are complicated in construction.

The invention is based on the object of a device to create the type described above, which ensures the production of accurately sized bags. In particular, a separation change should be carried out after Qurohführung the free end of the film securely from those lying behind the separating welding device in the feed direction Means of transport can be taken.

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Furthermore, the weld seams or separating weld seams should Cords can be manufactured precisely and firmly.

In a device for Here Tellen of packaging bags, in particular StrumpfbeuteIn, from a folded foil ice thennoplasfcischem plastic, with a Vorsohubbahn for the withdrawn example, from a roll film and having an in-range of the Vorsohubbahn Trennsohweißeinriohtung with two on both sides of the feed-plane, relatively movable bar , behind and behind which transport means, such as driven rollers, are provided for the film, based on the pre-lifting device, according to the invention a guide for the end of the film which can be moved approximately in the feed direction up to the transport means behind the separating pipe device is provided in the feed direction in front of the separating pipe . With this guide, the end of the film, which is initially in the pre-welded direction in front of the separating tube or in the direction of the separating tube, can be transferred precisely and earlier to the next transport means by the separating tube device, after which the film is then pulled again and the guide returns to its original position emotional. This ensures that the film is always fed reliably. The guide is expediently designed so that the oil is always in the guide

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is performed, so that a special mobility of the The slide does not interfere with leadership is required

According to a further feature of the invention, the guide is formed by two approximately parallel flattening webs , between which the film is passed and which lie approximately in planes parallel to the Vorsohubriohtung and aloh transversely to the Vorsohubriohtung, preferably over the entire width of the film, so daft sloh with simple Structure of the device results in precise guidance of the film.

The guide can thereby be moved in an elnfaoher manner stored see that they have at least one, preferably two levers on the side around one parallel to the frontal axis and axis selling perpendicular to the feed direction pivoted 1st. If the lever arm is sufficiently long, this results in an approximately straight movement the guidance between the rear side of the pedal arm in the feed direction and the next following transport means in the feed direction.

• ·

Are as a means of transport at a distance next to each other Rollers or the like provided »so instructs the leadership

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on its front side, which is located at the front, in which the transport means located behind the separating welding device in the feed direction are located in the corresponding position of the receptacle, so that the end of the film extends past the transporting means downstream of the separating welding direction in the feed direction Guide; Is performed. ■ "..

A particularly advantageous further development of the subject matter of the invention consists in "that the sealing bars of the separating device each run two parallel Have terminal strips, with between the terminal strips a beam, a preferably electrically heated welding and separating band is arranged, opposite which the The balcony is movably mounted »through the terminal strips the foil can be fixed on both sides of the welding and cutting point so that a clean welding and ' Separation guaranteed 1st. ■ '-

Appropriately, is one "preferably the bar assigned to the welding and separating band, mounted movably against spring force" while the other bar can be moved in the same direction of movement synchronously with the dtr ^? is driven. By moving the

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last-mentioned bar towards the other bar this raised against its spring force until the Foil is guided past the sweat and separating tape perpendicular to its plane. After moving apart The movable guide bar runs in the feed direction before until the end of the film is again drive-connected to the corresponding means of transport.

A particularly simple structure of the invention Device arises when the separation welding device and the movable guide over two arranged on a shaft, preferably adjacent cam levers and lever linkage are driven, and if the transport medium with the shaft of the cam, preferably via a chain or the like guided on a freewheel. and a crank mechanism of the shaft are drivingly connected.

Since the bag manufacturing device according to the invention can be used to produce very precise stocking bags and therefore do not have to be subjected to any special control, it has proven to be advantageous to attach a bag filling device directly to the bag manufacturing device with a preferably transverse transport device. . · ..

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Am a process for the manufacture of bags in which one Foil made of thermoplastic material In a Vorohubriohtung, for example moved intermittently and in Stand off under sole with a sweatband separated is * whereby the foil is held on both sides of the welding point during the separation weld and the sweatband is passed through the foil and then moved back and forth, the sweatband is invented first quickly brought up close to the predetermined weld, after which the weld with that of the sweatband

radiated heat and then the

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Sweatband is threaded through the full tube. Through this, that the smoldering BUtag is not by touching the Sohweiflband with the foil, but exclusively by means of radiant heat, the result is a very precise one Sohtfeifiung one smoke development and without the risk that calibrate the film in the area of the weld seam. In certain cases it is not necessary that the sweatband is passed through the foil. In a preferred procedure, however, that Sweatband after production of the swelling by means of the selected Vtrme through the foil hindu led " among other things to ensure a perfect separation of the foil.

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Oils quality taw. Weld durability can be nooh welter be improved «if first the sweatband. moved back and only after the welding point has cooled down the beldseltles holder of the film is released *

an-The invention is used in the following / hand of the Drawings as shown in the execution «- example splice explained in more detail. It is shown in

Pig. 1 an invented device in one vertical cut parallel to the pre-cut,

Fig. 2 shows the device Fig. 1 in Ansloht

from the left"

3 shows the device * according to FIG. 2 in perspective from the right"

Fig. 4 the Vorridtung gsaKss Fig. 2 in perspective <

from the left"

5 shows a connection to the device

Fig. 6 is a functional diagram of the apparatus in detail the Flg. 1 to 5

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As shown in FIGS. 1 to 5, an invention has Device for the production of ^ bags one duroh two Side plates 1/2 formed Vorriohtungsgestell, on one side of which two upwardly extending arms -3 are provided, which at their upper ends towards one another directed carrier 4 with lying coaxially to one another Cones 5, to accommodate a roll 6 with plastic film exhibit. In the illustrated embodiment, the roller 6 is formed by a folded plastic film 7, whose folded edge 8 is on one side of the roll, while the two parts 9, 10 of the film 7 extending from the folded edge are of different widths, so that one over the shorter film part 10 protruding bar of the other film part is formed. This bar formed at the coking bags to be made from the film

The film 7 is from the roll 6 down through a to. Roller 6 is guided by axially parallel steering rollers 11 and deflected approximately horizontally on this roller 11 In the direction of arrow 12, behind the steering roller, an intermittently driven feed roller 15 is provided under the film 7, above it a pressure roller 1, preferably spring-loaded, can be swiveled to an arm 15 is stored.

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The feed roller 1> let in the feed direction arrow 12 followed by a guide 16 for the film 7, wherein the guide 16 by two plate-shaped strips 17, 18 is formed «which are parallel to one another and to the foil 7 and extend over the entire width of the film. The film 7 is in the feed direction arrow 12 near the guide 16 by a Trennsohwoifielnriohtung 19 out, behind which the film 7 rests on, for example, means of transport formed by circumferential cord straps 20. The Schnurbtodor 20 are guided over one behind the other laying rollers 21, above each Roller blind 21 at least one in Figs. £ and 5 not detailed illustrated pressure roller 22 is provided. In a preferred embodiment, there are several pressure rollers 22 are provided side by side over each cord reel 21.

The Trennsohwelßeinrlchtung 19 has an upper BchWQißbalken 23 on «the perpendicular to the top

dor the force of a spring 24 is displaceable and itself

Over the entire width of the film perpendicular to the direction of feed Arrow 12 extends. De * sealing bar 25 let by two

parallel lOemleleten 25 formed. between those in the initial position of the upper upper hemisphere 23 an in ^ iersobnitt preferably five-cornered _> , for example electrically heated sweatband 26 arranged

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1st. The sweatband 26 is mounted in a voaiohtungsfest with holders 27 in such a way that the upper Sohweißbars 23 can be moved upwards relative to the sweatband 26 until the sweatband 26 is exposed.

Below the upper SohwAßbalkens 23 under the film 7, a lower welding bar 28, which also has two clamping strips, is mounted on a guide rail 29 such that it can be moved perpendicularly. If the lower surface welding bar 28 is moved upwards, the film 7 running over the lower pivoting bar 28 is lifted in the region of the separating welding device and is pressed by the clamping strips of the lower welding bar 28 against the clamping strips 25 of the upper welding bar 23, so that the film recorded on both sides of the sole tape 26 1st. With the further movement of the lower welding bar 28 upwards, the upper welding bar 23 is moved upwards against the force of the spring 24, so that the welding band 26 acts on the film 7 in such a way that a separating weld seam is formed. When the welding bars 2 ?, 28 move apart, the film 7 and the part BtUok separated from it are free again. Since * cut off the piece is moved on by the transport means 20 in the direction of advance arrow 12 - ■■■ '·' ■ ·

As the drawings also show, the guide \ 6 is on an el ^ ia ^^^ vertical, vedältnisintosig long arm

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attached, its lower end around a to the plane of the Polie 7 parallel and perpendicular to the direction of travel Arrow 12 lying axis 31 pivotably mounted let.

After the sealing bars - as described - again are moved apart, the guide 16 is approximately in Vorsohubriohtung by pivoting about the axis 31 Arrow 12 moves, with the film 7 also moving through the feed roller 13 at the same speed is moved in the direction of advance arrow 12. You movement the guide 16 in the advance stroke direction arrow 12 is immediately behind as far as the in the advance direction arrow 12 of the TrennBohWGißoinrichtung 19 lying feed roller performed in such a way that the free end of the film 7 is transferred to this feed roller and thereby the End of the slide 7 again between the transport sonUren 20 and the pressure rollers 22 is pulled. As FIG. 5 shows, the guide 16 can also have cutouts 32 be provided in which the arrow in the feed direction umnilfcelbar lying behind the Trennsphweißelnrlchtung 19 Traneport and / or AndrUokrolle 22 are when the guide 16 is 3loh in its corresponding end position is located. After handing over the Follenehdos to the in advance arrow 12 behind the separating weld Einriohtung 19 lying down transport means, the guide

16 is pivoted back into its starting position just as shown in FIG. 1,

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so that a nltahete Trenneohweiitiag in the described Weiae can be done.

As the drawings also show, 1st between? the Side plates a horizontal shaft 33 lying perpendicular to the advance stroke direction arrow 12 is rotatably supported below the lifting plane, this shaft 33 being supported by a on the one rare plate 1 attached motor 34 over a belt or chain drive 35 is driven, on the outside of the, a rare plate 2 carries the Shaft 33 has two adjacent cam shafts J>6> yj, which are rotated with the shaft 33 duroh the motor 34. A spring-loaded angle lever with a roller 39 rests on the inner curve 36, which is connected to this by a tension spring 40. The lower, approximately horizontal arm 41 deejum the axis 42 pivotable angled lever lies below the lower Solweiß beam 28 ″, the welding beam 28 being supported by a roller 43 on this arm 41. As a result of the pivoting movement of the angle lever 38 caused by the inner cam disk 36, the lower base bar 28 is raised and lowered in the described catfish with each revolution of the shaft 33.

On the outer cam 37 is on the Angle lever 38 opposite side a duroh the tension spring 40 spring-loaded lifting »! 44 with a

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Roller 45, the lever 44 being connected to the part 46 of the guide 16 that is pivotable about the axis 31 is, so that the guide 16 with one revolution of the shaft 33 once approximately in the direction of advance arrow 12 is moved back and forth. The Trennechwaißeinriohtung 1§J and the guide 16 are SQjnit synchronous with each other driven so that they perform exactly the interdependent functions described above.

As Fig. 4 also shows, 1st on the chain drive 35 having side of the Vorrlohtungsgestelles on the shaft 33, a crank mechanism 47 is arranged, which on a lever arm 49 hinged to the rare plate 1 at 48 acts in such a way that this arm 49 is pivoted back and forth once with each rotation of the shaft 33 will. At the free end of the arm 49, the end 50 of a chain 51 is attached, the lever 49 is formed from that the end 50 in different. Distances from the pivot axis 48 can be attached. The chain 51 is guided over a sprocket 52, the one on the wave of in advance arrow 12 In front of the feed roller 13 lying in front of the welding unit 19, there is one of these chain cad 52 Chain 51 over a steering wheel 53 below guided and attached to a tension spring 54, whose

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other end 55 after another redirection at the Side plate 1 supported lot. Bas on the shaft of the feed roller 1? arranged sprocket 52 · is via a Vrellauf not shown in detail with the pre-stroke

the

roller 13 connected in such a way that vegetables Fig. 4 at / left directed pivoting movement of the HeWL 49 the Vorshubrolle 13 is not entrained by the chain 51. at the swiveling movement of the lever to the right, on the other hand, will the feed roller 1? via the chain 51, the sprocket 52 and the not shown Taken free running so that the film 7 is transported. In this way, the film 7 becomes a predetermined width with each revolution of the shaft 53 the piece corresponding to the bag to be produced is advanced in the advance direction arrow 12. Through the An essential aspect of the invention of the described Vorsohubantrlebes is also the advance of the film 7 precisely controlled as a function of the punctures of the separating welding hole 19 and the hole 16.

The cam disk 37 is designed in such a way that the Guide 16 with one of the respective rotational speed the speed corresponding to the feed roller 13

arrow in advance notice / 12 moved. Here is the

Cam disk 37 two-circled in such a way that

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The guide 16 initially slows down and then increases Moved faster in arrow direction 12, after which the honor 16 again before one end of their path of movement is decelerated steadily and slowly.

The cam disk 36 for the separating tube direction 19 is designed in such a way that the lower tube element 28 is moved according to the diagram according to FIG. In a first movement phase 56, the lower sealing bar 28 is quickly moved upwards until the film 7 between the adhesive strips of the sealing bars 23, 28 is frozen in phase 57 and the sealing strip 26 is in the film without touching it , is located. During this Ibt * 57 the film is welded by radiation windings and, if necessary, already separated Sweat band 26 penetrates the film 7 in the Aase 59. OmMi the welding bar 28 is first in the IbMe 86 .flwt long again * · * so that the weld seams in place can atheat and solidify. Kach solidification of wßnKhte, the lower welding bar 28 in the EGAE 61 again zdt groViserer Oesohwindlgteelt Me his AnsgiiniiffT gt ^ «« ^ Afcj-Npfc- ** toiohluss "n

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This sequence of movements of the Tremsohweifieinrichtung 19 is in a following movement phase 62, the guide 16 is moved in the manner described approximately in the direction of advance arrow 12 * until the end of the film © is transferred to the means of transport @ $. @ ü3, after which the guide in the movement phase 63 back again is moved to its starting position. With the beginning of the described sequence of movements 56 to 6 $ , the phase 64 of the return of the chain 51 begins, during which the feed roller 13 stands still. This backward movement is ended with the movement phase 61 and it then closes / _; dSite opposite gericiitete Bewegungsphas © sxi _a at which the feed roller 13 tte by don KurteX tri @ li 4t tib © r di © K @ § 1 and unspecified darg © ~ is "F ^ ila-iif i ά®2? ä @% Fe ^ aQ & tibriehtTiDg arrow

Claims (1)

/ tf 156U51 Initiation 1. Apparatus for manufacturing packaging bags, in particular stocking bags, made of a folded film made of thermoplastic plastic, with a Feed track for the film withdrawn from a roll, for example, and with an im " Cut-off welding device located in the area of the feed conveyor with two on both sides of the feed conveyor lying, relative to each other movable bar " behind and in front of them - based on the direction of feed - means of transport, such as driven rollers are provided for the film, characterized in that in the feed direction (arrow IS) in front the separating welding device (I9) an approximately in Feed direction (arrow 12) up to the one in this direction behind the separating seam tearing device (19). Transport means (20 to 22) movable Guide (16) is provided for the end of the film. 2. Apparatus according to claim 1, characterized in that the guide (16) through two approximately j & alleles Plate webs (17, 18) is formed, between which the film (7) is passed and the ettm lie in planes lying parallel to the feed plane and perpendicular to the feed direction (PfciV), - 2 -New documents (Art7 | iAi * 2Nr.ia 009831/1304 preferably extend over the entire width of the film. 3 " Device as in claim 1 or claims and 2" characterized in that the guide (16) runs over at least one, preferably two lateral HqOoI (JO) around an axis (31) parallel to the advance stroke plane and perpendicular to the advance stroke direction (arrow 12) . is pivotably mounted. The device according to one of the preceding claims, characterized by the fact that the guide (16) on its front side in the feed direction (arrow 12) shows at least one recess (32) in the pre-cut position (arrow 12) behind d @ K »TrexmsehweiSsinrichtung (19) lying © Transport means (22) are in the corresponding position of the guide (16} · 5. Vorriehtung according to one of the preceding claims "characterized" that the Sohwelßbalken i% 3 » 28) of the foreign welfare device (19). two parallel terminal strips (S3) each and that two dec ^ Clemmleiston (25) 009831/1304 bad orsginal " ^156U51 a beam (23), preferably an electrical one heated welding and separating band (26) is arranged, opposite which the beam (23) is movably mounted is. 6. Device naoh claim 5, characterized in that that a bar (23), preferably the one associated with the welding and separating band (26), counteracts the spring force movably mounted and the other bar (28) in the same direction of movement-synchronous to that movable guide (16) is driven. 7. Apparatus according to claim 5 or claims 5 and 6, characterized in that the separating welding device (19) and the movable guide (16) over two cam discs (36, 37) arranged on a shaft (33), preferably next to one another and lift modes (38, 44) are driven. 8. Device naoh one of the preceding claims, characterized by the means of transport (20, 21) with the well (33) of the curved disks (36 * 37) preferably guided by a Auffsiwi freewheel ' Chain (51) or the like. And a crank mechanism (47) of the shaft (33) are drive-connected. - 4 -009831/1304 _BATH •. · -. 156U51 tr "dnsbesondere- voFrionfcung \ nauhem the v © i? h®ä? gefeQnd @ a claims, daduron gekennaeishast that $ © r BeutelaerstelX » vorriefottsng directly "ine with ¥ Örat2g8welse quer il®isads3? is* 10 «Expired for the production of bags, bsi d © ra © la © Foil® made of thermoplastic ICsmet ^ to ^ in 3in @ r VorMbrichtung, toebeispielsweis © lat © naitt3a? End b®% r®gt and in Äb ^ t ^ äen iEt @ r Sdi ^ iSimg eit Schweis ßbiuad gcstressifc wi ^, wotei (Si © foil w the ^ enneobHd'iJBune! on both sides ^ daa SebweiAbanä. mMImMU IßB} ssss stierst ^ ae geSäwd.ßfcsäfi EAD ORiGINAL '98 -31/1304