DE8017369U1 - Device for welding foil packs - Google Patents

Description

Device for welding foil packs

The invention relates to a device for welding film packs with a film welding device that transversely has welding jaws which are arranged to run in relation to the transport direction and are movable relative to one another.

Devices of this type are known. They usually have a fixed and a movable welding jaw, or but two movable welding jaws. With the sealing jaws open, the foil packs are pushed through, then they are held and the welding jaws moved towards each other. They hold the foils between each other fixed. Then one or both welding jaws are heated, which leads to a weld. Afterward the heated welding jaw must cool down before the two welding jaws are separated from each other again. The capacity such devices is not only due to the mechanical transport capacity, but above all due to the cooling time limited. The invention is based on the object of further improving a device of the type mentioned at the outset in such a way that that they can process a larger number of foil packs per unit of time. To solve this problem the invention proposes a device of the type mentioned, in which a perpendicular to the transport direction between two positions movable pick-up device with two

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is provided for at least one foil pack each, and in the case of the two positions alternately one receptacle in the welding position and the other receptacle in one Transport position.

This means that in position 1, the receptacle 1 is in the welding position and the receptacle 2 is in the transport position, while in position 2 the receptacle 1 is in the transport position and the receptacle 2 is in the welding position. This will it is possible that the next foil pack is transported during the welding-cooling process, so that overall results in a higher number of pieces per unit of time.

In a further development, the invention provides that two welding positions and there is a transport position between them. This makes it possible to use the device to operate with a single transport device.

In principle, each welding position can have two welding jaws that can be moved towards one another. It is particularly cheap however, if, as the invention further suggests, a fixedly arranged welding jaw for each welding position and a common movable welding jaw is provided for both welding positions. This is a special one inexpensive and uncomplicated training, as only one movable part is required for two welding positions is provided. The movable welding jaw is in this case of the respective fixed welding jaw on the other Side acted upon.

In a further development, the invention provides that the fixed Welding jaws are heatable. This is particularly favorable for the supply of heating energy.

The receiving device can, for example, be displaceable in the horizontal direction. However, it is particularly favorable

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if you have a vertically movable lift with two on top of each other arranged recordings is. The welding jaws then accordingly run horizontally.

In order to ensure precise welding of the foils, the invention provides that the welding jaws have a retaining device for the foil parts to be welded. This ensures that during the welding process there is no shifting or stretching of the film, so that a secure welding is guaranteed.

It is particularly favorable if the retaining device is a with its legs enclosing the fixed welding jaws, in cross-section approximately U-shaped, resiliently connected to the welding jaw profile, the edges of which protrude towards the movable welding jaws. In this embodiment, when the movable sealing jaw moves on top of the stationary one, the film is first held between the movable welding jaw and the edge of the profile as the welding jaw moves further the profile is moved away against the action of the spring, holding the film securely in place. Holding on also takes place during the welding process and shortly afterwards.

In a further development, the invention proposes that on the movable and / or the fixed welding jaw is provided with a suction device for holding film parts is. This is particularly beneficial in order to remove protruding film parts that have been separated by the film welding device. to hold on. For this reason, the suction device is advantageous arranged between the sealing jaws and the open end of the foil packs.

It is particularly favorable if the mouths of the suction device lie within the U-profile. support them thus the retention effect of the U-profile.

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It has been found to be advantageous that the mouths face each other in the movable and the fixed jaws.

It is also advantageous if the mouth or mouths of the suction device are connected to the U-profile are. Then they spring back together with the U-profile before the welding process.

Further features, details. And advantages of the invention emerge from the subclaims and the following description of a preferred embodiment of the invention as well as based on the drawing. Here show:

Fig. 1 is a highly schematic side I

sees a trained according to the invention Contraption;

2 and 3 the two positions of the receiving t

stage; 1

4 shows a detailed view of two welding I

to bake; |

FIG. 5 is a view of the arrangement according to FIG.

in the direction of arrow V; I.

6 shows a simplified representation of the | Drive of the movable welding jaw; | 7 shows a view approximately along line VII-VII 1

i η F i g. 6; I:

Fig. 8 is a view of the drive of the open;

taking stage;

■ I II '· · *

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FIG. 9 shows a simplified view approximately along line IX-IX in FIG. 8.

The shown schematically in Figure 1 according to the invention configured device has a conveyor belt 11 on which the foil packs to be closed in one direction can be transported perpendicular to the plane of the drawing. From this conveyor belt 11, the foil packs are with With the aid of the slide 13, it is pushed onto a sliding table 12 which is arranged directly in front of the welding device.

The Schwaißeinrichtung 14 contains two fixed welding jaws 15 and one arranged between these and between them displaceably movable welding jaws 16. In FIG. 1, this movable welding jaw 16 is in its lower position drawn, it is drawn vertically up to its contact with the upper welding jaw movably arranged.

Immediately in the transport direction behind the welding device 14 is a lifting platform 17, which in the direction of the double arrow 18 is designed to be displaceable. In Fig.1 this lifting platform 17 is drawn in its lower position, in which the upper receptacle 19 is in the transport position, while the lower receptacle 20 is in the welding position. Each receptacle 19, 20 can accommodate a poly pack be formed, but there can also be several foil packs next to each other, which then during welding be closed at the same time.

In the illustrated transport position of the receptacle 19, the film packs are both in the receptacle 19 of pushed in to the right and pushed out further to the left onto the next conveyor belt 21 after the welding process. This is done in that a new film pack is pushed into the receptacle 19, which at the same time the closed foil pack out to the left

«I III · · t

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is pressed. Only when no more new foil packs are pushed in does it have to be pushed out onto others Way to be done. On the conveyor belt 21, the closed and welded foil packs are in a plane to the sheet transported away perpendicular direction.

The slide 13 is arranged at the front end of a rod 22, which is connected to the piston of a not shown Servomotor 23 is connected. It can be, for example, a hydraulic servomotor, which by pressure in the line 24 is controlled. The displacement path of the slide 13 is of course so great that it can move the foil packs at least up to the recording 19 or 20 can slide.

With the help of Figures 2 and 3, this is with the help of the invention Device to be carried out method described in detail. In Figure 2, the transport position is reached for the receptacle 19, while the receptacle 20 is in the welding position lies. A foil pack is pushed into the receptacle 19 from the right with the aid of the slide 13. The slider 13 acts within the film pack shown by the dashed line 26 on the filling material itself, which can still cause a certain compression of this product. The foil pack 25 is pushed into the receptacle 19 until that the filling material is completely contained in the receptacle 19. Then the slide 13 is by appropriate Actuation of the servomotor 23 withdrawn, and the lifting platform 17 by a device to be explained later moved up. At the same time, the movable welding jaw 16 is also moved upwards, but not by the same amount. After the lifting platform 17 and the movable welding jaw 16 have been moved, the one shown in FIG Position reached in which the receptacle 19 is now in the welding position and the receptacle 20 in the transport position lies. As soon as the movable welding jaw 16 presses the film against the stationary welding jaw 15, the welding

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bake 15 heated, which leads to a scuffing of the film and a separation of the right part of the film. During welding and subsequent cooling, from the slide 13 the next foil pack 25 'into the Recording 20 of the lifting platform 17 pushed in. Now the slide 13 is withdrawn again and the lifting platform 17 and the movable welding jaws 16 moved downwards until the position shown in Figure 2 is reached again, in which now the foil pack 25 'is welded and the foil pack is pushed out of the receptacle 19 to the left by pushing a third foil pack.

Details of the welding jaws can be found in FIGS. 4 and 5 emerged. The fixed welding jaw 15 is attached to the upper end of a guide rod 27 on both sides. The attachment is carried out with the help of two screws 28, so that an adjustment and thereby adjustment of the position of the Welding jaw 15 is made possible. The welding jaw 15 is screwed to a bracket-like bracket 29, on which two sockets 30 are also arranged. Inside the socket 30 a pin 32 acted upon by a spring 31 is arranged, at the lower end of which a profile 33 is attached. The profile 33 has an approximately U-shaped cross section. The attachment to the pin 32 takes place on the web while the two legs 34 lie on both sides of the welding jaw 15. The lower edges of the U-profile 33 are somewhat down over the lower edge of the welding jaw 15, you can from this position against the action of the spring31 be pushed up.

Also within the U-profile 33 is a slit-shaped tubular part running in the longitudinal direction of the welding jaw 15 35 arranged, which merges upward into a tubular extension 36 which is connected to a suction device.

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The suction device is used to position the film parts before and during welding.

The movable welding jaw 16 also has a
Slot 37 in its upper and lower side, this slot being arranged in a vertical extension of the opening of the tubular part 35. The slot 37 is with a
Longitudinal bore 38 in connection, which in turn with a
Connection nozzle 39 in connection. Approach 69 is
also connected to the suction device.

As can be seen from FIG. 5, the movable welding jaw 16

slidable on both sides on the guide rod 27 |

stored, its movement is loaded via a connecting rod 69 |

acts, the upper end of which can be seen in Fig.5. \

In Figure 6, the drive of the movable welding jaw 16 |

shown. In Fig. 6 there is the welding jaw 16 \

in its lower position, also the dashed line }

provided lifting platform 17. To simplify the illustration!

6 the lower fixed welding jaw 15 |

not shown, nor is the drive device for |

Movement of the lift 17. |

In the housing 40 of the device is a central shaft 41 | stored, which continues to the right and is driven there by a motor, not shown. With the wave 41

is rotatably connected to a wheel 42, which is used to control the

Movement of the welding jaw 16 is used. A control cam 43 of the wheel 42, shown in dashed lines in FIG. 7, engages; a role 44 on. The roller 44 can etweder by spring)

force against the control cam 43, it is also

so possible that the roller 44 is guided in a groove,
the cam 43 then from the side wall of the groove
is formed.

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The roller 44 is rotatably arranged in the front area of a handlebar which is rotatable at its left end on the housing 40 is held. The front end of the link 45 carries the upper end of a connecting rod 46, the lower end of which is connected to a bend 47 of a second link 48. This link 48 is also rotatable on the housing 40 held. The handlebar 48 is connected to a crank attachment 50 via a compressed air cylinder 49 serving as a gas spring connected, which on a stored in the housing 40 WeI-Ie 51 is attached. The shaft 51 is mounted on both sides in the housing 40 and carries outside the Housing each has a crank attachment 52, at the end 53 of which the connecting rod 69 is attached. The other end of the connecting rod As already mentioned above, 69 is attached to the respective end of the welding jaw 16.

A rotation of the shaft 41 and the Ra- | connected to it des 42 leads via a pivoting movement of the link 45 to | a pivoting movement of the handlebar 48, this pivoting movement leads to a reciprocating rotary movement of the shaft 51 and accordingly to an up and down movement of the welding jaw 16, which is supported on the guide rods 27 and is led.

The compressed air cylinder 49 serves as a backup against a overloading of the welding jaw when pressing against the two fixed welding jaws 15.

In Fig.8 and 9 is the same device as in Fig.6 and 7 is shown again, but this time only the drive parts for the movement of the lifting platform 17 are shown in the drawing shown. On the shaft 41 already described there is a second wheel 54, with a control groove 55. In the The control groove 55 moves the roller 57 arranged at one end of a two-armed lever 56. The two-armed lever 56 is rotatably mounted on a bracket 58, which is fixed to the

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"Housing 40 is connected. At the second end of the lever one end of a push rod 59 is rotatably mounted, the other end of which engages a projection 60 of the lifting platform 17. In its central area, the push rod 59 is widened and forms a slot 61 through which the shaft 41 passes through. A pivoting of the roller 57 due to a non-circular arrangement of the control groove leads to a pivoting of the lever 56 and to an up and down movement of the push rod 59.

The lifting platform 17 is provided on each of its two sides with a lug 62, each lug 62 slides on guide rods 63, which at its lower end with the housing 40 are connected. This tour is only shown schematically. When the push rod goes up and down therefore the lifting platform 17 is pushed back and forth between its two positions. The dwell time of the lift 17 in the upper or lower position is brought about by corresponding flat sections of the control groove 55.

Due to the presence of two wheels 42 and 54, the movements of welding jaws 16 and lifting platform 17 can be controlled accomplish completely independently of one another, but synchronized due to the common drive shaft 41. The shaft 41 can also have switches or other devices for controlling the servomotor 23 and the introduction of the welding process of the welding jaws 15.

Mif'beheizbar "is the name of the welding jaw that the releases the energy required for welding to the film. It can be a resistance-heated welding jaw act, which therefore becomes warm itself, but other types of heat generation are also possible, in which the Welding jaws may not get warm themselves. For example, it can be an HF or ultrasonic welding Act.

Claims (11)

Expectations 1. Device for welding foil packs with a foil welding device, which are arranged to run transversely to the transport direction and are movable relative to one another Has welding jaws, characterized in that one perpendicular to the transport direction between two Positions movable receiving device with two receptacles (19, 20) each provided for at least one foil pack is and that in both positions alternately a receptacle (19, 20) in the welding position and the other Recording (20,19) is in the transport position. 2. Apparatus according to claim 1, characterized in that two welding positions and one between them Transport position exists. 3. Apparatus according to claim 1 or 2, characterized in that a fixedly arranged for each welding position Welding jaws (15) and for both welding positions ,, «A at ·· III A 18 416/7 - 2 - a common movable welding jaw (16) is provided. 4. Device according to one of the preceding claims, characterized in that the fixed welding jaws (15) can be heated. 5. Device according to one of the preceding claims, * characterized in that the receiving device is a * · Vertically movable lifting platform (17) with two ^ mutually arranged recordings (19, 20) is. i · 6. Device according to one of the preceding claims, characterized in that the welding jaws (15, 16) have a holding device for the to be welded Have foil parts. 7. Apparatus according to claim 6, characterized in that the retaining device with its legs (34) including the fixed welding jaws (15), in cross section approximately U-shaped, resiliently connected to the welding jaw (15) profile (33), the Edges protrude in the direction of the movable welding jaws (16). 8. Device according to one of the preceding claims, characterized in that on the movable (16) and / or the stationary welding jaws (15) are provided with a suction device for holding film parts in place. 9. Apparatus according to claim 8, characterized in that the mouths of the suction device within the U-profile (33) lie. 10. Apparatus according to claim 8 or 9, characterized in that the mouths in the movable (16) and in A 18 416./7 - 3 - the fixed jaws (15) are opposite one another. 11.Vorrichtung according to any one of claims 8 to 10, characterized characterized in that the mouth of the suction device is connected to the U-profile (33).