DE1948228A1 - Method and device for closing sacks, bags or the like, preferably made of plastic. - Google Patents

Description

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Haver & Boecker, 4? 4, Oelde (Westf.), Oarl-Haver-Platz

"Method and device for closing sacks, bags and the like, preferably made of plastic"

The invention relates to a method and to a Device for closing sacks, bags or the like, preferably made of plastic

The seams of the filled bags are "during transport of the sacks on loading and stacking belts, during storage and considerably stressed during transport in stacked layers, so that the lock must be perfect.

Especially in the context of an automatic filling and closing machine Special care must be given to the closure of the sacks, so that on the often long way to the end user no product is lost.

The invention has the object of ice method and a device for closing sacks, bags od. The like to develop., D & e may or · wesden the high in a filling Versehließmaschine IMD performance related.

1098 U / 1130-

This object is achieved in that the filled, open-topped sacks adjacent to the delivery station the upper end to be closed held in the bottom area supported and intermittently promoted and in the first cycle break after filling by squeezing the above the cross-section of the filling is vented and closed in the following two cycle pauses

In the method according to the invention that is above the Filling lying rope of the sack relieved of the filling weight, so that the area of the sack to be closed only by the stressed forces exerted by the locking device · The venting, sealing and cooling of the sealing seam take place during the breaks of the funding institutions This ensures "that the design effort for di © ventilation device, for the locking mechanism and for the cooling device is low.

Further characteristics and features of the invention emerge from the following description of an advantageous, exemplary embodiment

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1 shows the filling and sealing machine according to the invention in Side view or in longitudinal section,

Fig «2 dem. constitutes FIG _c 1 corresponding plan ·

To filling and closing bags 1 can be taken in the illustrated machine has a device 2 to a magazine 3 and after the A ^ ustieren the inlet height and fed to a VorÖffnen the Saekmündung the filling Λ.

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Conveyors 5, 6 are provided for transporting the sacks are arranged on a horizontal plane "and are endless Have chains 7, 8, which are equipped with grippers 9, 10. The grippers grasp the bags "adjacent to the side edges, and although below the Saek mouth rims.

In the filling station, the bottom of the sack is supported on a conveyor belt 11, which carries the filling weight of the sack to the delivery station.

The conveyor J>, 6 and the conveyor belt 11 are synchronous and intermittently driven, only the filling of the sack is left, but also the downstream operations are carried out in the cycle pauses, i.e. when the aforementioned conveyor systems are at a standstill.

In the first cycle pause after filling, this will be flawless Closing of the sack prepared by intensive ventilation of the sack part above the filling.

For this purpose squeeze bars 12, 13 are provided which are pivotable about a horizontal axis 14 and vertically can be proceeded.

In Fig. 1, the squeeze bars are in the open Position shown in dash-dotted lines. From this figure it can be seen that the Abquetsehwangen a relatively large Have pressing surface.

Fig. 2 shows the Abquetsehwangen in section, in closed position.

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From this figure it can be seen that the pinch swings almost over the entire tree between the sides of the sack attacking grippers 91 10 extend · tray the squeezing of the upper part of the bag, the Abquetsehwangen are opened and move upwards so that they are outside the range of motion of the next sack to be transported.

If the bags are made of plastic, the 7 Welding of the bag mouth according to the invention in two P stations 15 * ukL 16. Station 15 is the preheating station, while the actual welding is carried out in station 16. The shape of the jaws 17, 18 in the station 15, the The compression pressure and the heat load exerted by the jaws on the bag parts to be closed are selected according to the bag material and the type of bag.

If gusseted bags are to be closed, this arises the problem that in the area of the gussets there are four layers of material are present, while the middle part of the sack has only two layers of material. In this case, 15 pairs of jaws are provided in the preheating station, the dLe gusset-K Grasp bags in the area of the side gussets. The heated gussets and also the middle part of the Sacks are then placed in station 16 between jaws 19, 20 welded, which extend over the entire width of the bag.

The preheating station 15 is not only advantageous when welding plastic side-gusseted sacks, but also flat sacks for heavy goods in which the sack walls are made of strong film material.

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A cooling station 21 is attached to the welding station 16, in the spaced-apart 'a gaseous' Tubes 22, 23 which carry cooling medium and are disengaged with spray nozzles are provided. The spray nozzles are arranged so that the Cooling medium from both sides onto the welded head seam is sprayed or sprayed

The filled and closed sack is then removed from the conveyor belt 11 and the conveyors 5 and 6 to a loading belt 24 or the like submitted.

It is also possible in the preheating station 15 "or in the Welding station 16 to warped on heated jaws and the Preheating and the actual visual environment with the rest of the familiar Welding systems, such as pulse or hot air welding or a To carry out welding by radiant heat

To close the sack, a reciprocating sewing machine 26 can be arranged. tuck Sewing machine is indicated in Fig. 1 in dash-dotted lines.

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Claims (1)

-6- WAB22B latent impulses ■ aaaaaas Ρ \ ή Method for closing sacks, bags or the like, which are preferably made of, dadurck indicates that the filled sack open at the top is held up to the delivery station adjacent to the upper end to be closed, supported in the bottom area and conveyed intermittently is ventilated in the first pause after felling by squeezing off the surface area above the filling and is sealed in the following two pauses " Method for closing a plastic sack according to Claim 1, characterized in that the. Mn & ungsranaer initially preheated, in the following laktpaus © ve & r achweißt \ md in the following ^r i) aktpaiisβ gatühli; will" 3 · Method for closing a plastic gusseted sack naeh claims 1 and 2, characterized in that exclusively the mouth edges preheated in the area of the side folds and in the following lactation break the sack over the entire Wide »is welded ·> 4 · Device for carrying out the process according to. Speech 1, connected by aiig «ordaet © ₉ at a distance from one another in a horizontal plane, with the sacks underneath the mouth render adjacent to the side edge mi * de »eyachroa and int * r» itti «r« nd circulate · Apparatus according to claim. 4, indicated by vertical movable squeeze bars that can be pivoted about a horizontal axis, which extend over the rope of the sack lying between the grippers above the filling. 6. Device according to claims 4 and 5, characterized in that that pairs of jaws extending over the gusset area or pairs of jaws extending over the entire width of the sack are provided for preheating 7. Device according to claims 4 to 6, characterized in that pairs of jaws extending over the entire width of the bag are provided for welding, ν © η ^{: of} which at least one jaw is movable. 8. Device according to claims 4 to 7 «characterized by equipped with nozzles acting on both sides of the weld seam, pipes through which a gaseous cooling medium flows « 9. Apparatus for performing the method according to claim 1, characterized in that for YersehlieB © n of the sack a reciprocating sewing machine is provided 1098U / 1130