DE102016121574A1 - Welding device - Google Patents

Abstract

The invention relates to a device for welding individual products (P, P,... P) conveyed one behind the other in a conveying direction (F) or product groups (G, G) formed from individual products (P) or from several product groups (G). combined stacks (St) in foil (60, 61), which has at least two welding units (318, 319), which are arranged in a about an axis of rotation (D) rotating support (310) parallel to the axis of rotation (D), and the parallel Distance (a, a) of the welding units (318, 319) to the rotation axis (D) is adjustable.

Description

The invention relates to a device for welding in individual products conveyed in a conveying direction at a distance from each other, or product groups grouped together from individual products, or stacks of films composed of several product groups. After welding, the product group / stack is fed into a shrink oven, where the film shrinks and closes tightly around the structure and the package is packaged safe for transport.

The products are, for. As to be filled with juice beverage cartons that are promoted, for example, coming from the bottling plant in a row behind the other. For example, a container can consist of six products, three next to each other and three superposed ones. The product groups can also be formed from four products lying next to each other, so that a container consisting of eight products can be formed, wherein the number of products within a container is arbitrary.

The two film webs must be welded together in relation to the transport direction in front of and behind the products / product groups / stacks, so that then the two films are separated from the film web and connected to one another. The length of the pieces of film used is dependent on the size (in particular the length in the conveying direction) of the products / product groups / stack. Welding of the film can only be timed. For this purpose, a rotating about a rotation axis welding unit is often used, which is rotated in each case by 180 ° to form a weld. If the size of the material to be welded changes, the welding unit must be replaced many times, which leads to a standstill of the system.

In particular, when up to 54,000 products (product packages) are processed per hour, only short intervals are available in which the welding units can be effective.

Starting from this problem, the device described above is to be improved so that even with a high conveying speed promoted products can be safely welded and an adjustment of the welding unit to a changed product size is easily possible.

A device for welding in individual products conveyed in a conveying direction at a distance from one another or product groups grouped together from individual products or in a plurality of product groups comprises at least two welding units which are arranged parallel to the axis of rotation in a holder rotating about a rotation axis , Wherein the parallel distance of the welding units to the axis of rotation is adjustable.

By this configuration, a welding unit can be used, the rotational diameter can be adjusted. If the material to be welded is large, the diameter, ie the distance of the welding units from each other, is increased, if the product is small, the distance is reduced. A change to changed goods is quick and easy. Due to the rotating arrangement, a fast clocking can take place.

Preferably, the distances of the welding units are independently adjustable. The distances can be equal in magnitude, so that the welding units are arranged diametrically in relation to the axis of rotation in the holder.

To set the distances, the holder is preferably formed from a first part and a second part, wherein both parts are displaceable relative to each other in at least one longitudinal guide.

The two parts can preferably be mutually displaceable by an electric motor.

The device according to the invention is preferably arranged above a conveyor, wherein in particular preferably a conveyor belt of the conveyor forms the abutment for the welding units. The welding units may be welding wires or ultrasonic heads.

The products, product groups and / or stacks are welded in two film webs. Preferably, the holder is driven to rotate about the axis of rotation.

In order to take into account the different rotational diameter for welding the two films together, the holder is preferably mounted displaceably in a frame in the vertical direction.

Due to the adjustable distances of the welding units, the repeat distance can be created in conjunction with the sliding bearing (height device), which is required by the respective product group.

By a U-shaped design of the welding units can dive packs in the welding plane between the welding tools. This allows the containers closer stand together, whereby a lower film consumption is realized, resulting in a better quality container.

With the help of a drawing, embodiments of the invention will be described in more detail.

• 1 - eine perspektivische Darstellung einer Verpackungsmaschine;
• 2a - die Draufsicht auf den Aufteiler in einer ersten äußeren Position;
• 2b - die Draufsicht auf den Aufteiler in einer zweiten äußeren Position;
• 2c - die perspektivische Ansicht des Aufteilers nach 2b;
• 2d - die perspektivische Darstellung des Aufteilers nach 2a;
• 3.1 - eine perspektivische Darstellung eines Staplers in einer ersten Ausführungsform;
• 3.2 - eine vereinfachte Darstellung des Staplers nach 3.1;
• 4.1 - eine perspektivische Darstellung eines Staplers in einer zweiten Ausführungsform;
• 4.2 - die Darstellung nach 1 mit Produkten/Produktgruppen;
• 5 - die Abfolge des Stapelns in sechs Bildern in schematischer Darstellung;
• 6 - die Vorrichtung zum Einschweißen;
• 7 - eine schematische Seitenansicht der Vorrichtung nach 6;
• 8 - den Schnitt entlang der Linie VIII-VIII nach 7;
• 9 - eine schematische Seitenansicht der Vorrichtung nach 6;
• 10 - den Schnitt entlang der Linie X-X nach 9.

It shows:

• 1 a perspective view of a packaging machine;
• 2a - The top view of the splitter in a first outer position;
• 2 B - The top view of the splitter in a second outer position;
• 2c - The perspective view of the divider after 2 B ;
• 2d - The perspective view of the divider after 2a ;
• 3 Fig. 1 is a perspective view of a stacker in a first embodiment;
• 3 .2 - a simplified representation of the truck after 3 .1;
• 4 Fig. 1 is a perspective view of a stacker in a second embodiment;
• 4 .2 - the representation after 1 with products / product groups;
• 5 the sequence of stacking in six pictures in a schematic representation;
• 6 - The device for welding;
• 7 - A schematic side view of the device according to 6 ;
• 8th - The section along the line VIII-VIII after 7 ;
• 9 - A schematic side view of the device according to 6 ;
• 10 - the section along the line XX after 9 ,

The packaging machine consists of successively arranged conveyors 2 . 3 . 4 . 5 the endless conveyor belts 2.1, 3.1, 5.1 or a table 4.1 with it in the conveying direction F ₂ endlessly driven slides 4.2 . 4.3 be formed in a conveying direction F ₂ Products P ₁ . P ₂ . P ₃ , ..., P _i to promote different stations. The coming example of a bottling plant in a row behind each other in a first conveying direction F ₁ Promoted products are about a first conveyor 1 to the allocator 100 transported over which they are in the conveyor area F ₃ a second conveyor 2 be handed over.

allocation

The allocator 100 is opposite the first conveyor 1 or the first conveying direction F ₁ at an angle α and to the sponsor 2 or the conveying direction F ₂ at a second angle β tilted. As 1 is removable, are the first conveyor 1 and the second conveyor 2 arranged parallel to each other so that the angles α and β are the same size and about 20 °. The allocator 100 consists of a shell 110 and a fixedly arranged stand part 120 , The top 110 has two pulleys 111 . 112 on, over which a strap 113 in a third conveying direction F ₃ is driven endlessly circulating.

The top 110 is opposite the stand part 120 arranged displaceably and can in the conveying direction F ₃ be pulled back and forth, as a comparison of the 2a and 2 B shows. For this purpose, the pulleys 111 . 112 over a rack 114 connected with each other. The rack 114 could also be replaced by a toothed belt or driven linear unit. One above the rack 114 arranged engine 115 push the shell 110 in a linear direction back and forth in the desired position. Is the top 110 in the in 2a shown first outer position S ₁ run the products P ₁ . P ₂ . P ₃ , ..., P _i from the conveyor 1 coming against the belt 113 and get on the conveyor 2 diverted. The revolving belt 113 takes the products P ₁ . P ₂ , ... either easily with and supports them in achieving the speed of the conveyor 2 or reduced by the fact that it circulates the sliding friction of the products P ₁ . P ₂ . P ₃ , ..., P _i at the divider 100 , At the end of the divider 100 panning the products P ₁ . P ₂ around the angle β um and are from the conveying direction F ₃ in the conveying direction F ₂ from the conveyor 2 in the direction of the truck 200 transported.

Depending on how long the allocator 100 remaining in this first outer position results in the number of products P ₃ . P ₄ , ... in the first row R ₁ (right outside) are arranged one behind the other. To the formation of the next row R ₂ becomes the shell 110 linearly towards the inner area of the conveyor 2 shifted, so the track S , about which the divider the second conveyor 2 covered, enlarged. This splitting in parallel to each other in the conveying direction F ₂ staggered rows R ₃ . R ₄ Repeats until the top 110 has reached its second outer position (left outside), in 2 B is shown and the products P ₁ . P ₂ then be grouped into the last outer row R ₅ .

The speed of the conveyors 1 . 2 and the allocator 100 determine after that whether the products P ₁ . P ₂ , ... in the ranks R ₁ , ... R ₄ equalizes or adjacent to each other in the conveying direction F ₂ should be encouraged. If the products in the conveyor 3 arrive, they are dammed until the desired number of products is arranged parallel to each other. The conveyor 4 runs faster by a desired number than the conveyor 3 , Will the stopper at the end of the conveyor 3 solved, five products lying next to each other quickly in the conveying direction F ₂ transported, the first product group raised and their speed in the conveying direction F ₂ reduces, so that on the conveyor unit of the conveyor 4 overlying subsequent product group G ₂ under the raised product group G ₁ is conveyed through. Come the two product groups G ₁ . G ₂ to cover each other is the first product group G ₁ lowered and on the second product group G ₂ hung up. Subsequently, those in the two product groups G ₁ . G ₂ grouped products P ₁ . P ₂ . P ₃ . P ₄ , ..., P _i , in a foil 60 wrapped, which is fed via a roller and then on the fifth conveyor 5 in the shrink oven 300 where the film is heated to shrink and wrap around the grouped products, creating a transportable container.

forklifts

The device 200 for stacking at least two products P ₁ . P ₂ or two of several side-by-side products P _i formed product groups G ₁ . G ₂ has an inlet area e and a discharge area A on. The one for the forklift 200 provided conveyors 4 has a table 4.1 on, in the conveying direction F ₂ circumferentially driven slides 4.2 . 4.3 be moved away to the products P ₁ . P ₂ . P ₃ . P ₄ , ..., P _i in the conveying direction F ₂ to promote (push). At one above the table 4.1 arranged carrier 201 are on both sides to the conveyor 4 racks 230 . 240 arranged with the help of 3 .1 and 3.2 are described in more detail. The racks 230 . 240 are mirror images. The description is therefore mainly based on the frame 230 ,

In an envelope 231 runs a traction device 232 in a vertical plane. In a parallel distance to the envelope 231 is a second envelope 238 arranged in which a traction means 237 rotates in a vertical plane. The envelopes 231 and 238 are identical. At the traction means 232 . 237 are over bars 221 in the direction F ₄ regularly spaced gripper 220 attached, which is almost across the full width of the table 4.1 protrude. On the opposite frame 240 are also two identical envelopes 241 . 248 with in direction F ₄ circulating traction means 242 . 247 intended. Here are the traction means 242 and 247 over bars 211 regularly spaced gripper 210 arranged oppositely directed over almost the full width of the table 4.1 protrude. The traction means 232 / 237 . 242 / 247 are in the the table 4.1 facing ends of the frame 230 . 240 over three pulleys 234 . 235 . 236 meandering guided. The grippers are in this area 210 . 220 a vertical and a horizontal movement. Opposite the speed of the conveyor 4 (the slider 4.2 . 4.3 ) become the grippers 210 . 220 delayed by the vertical movement and the pulley 235 again in the conveying direction F ₂ accelerates so they are the same speed as the slides 4.2 . 4.3 taking.

In a third envelope 239 . 249 runs a timing chain, which is not shown here. About this timing chain, the gripper 210 . 220 around its longitudinal axis B to be twisted. Between the grapples 210 . 220 there is one product group each G ₁ , In the inlet area e the stacking device 200 is a stopper 202 provided, against which the divider 100 formed rows R ₁ . R ₂ . R ₃ . R ₄ , start and dammed. The products P ₁ . P ₂ ... P _i stop while the promoters 3 . 4 be driven further. Above the table 4.1 are alternately different high slide 4.2 . 4.3 attached. The sliders 4.2 . 4.3 are like 3 .2 shows, varies in height and become in the straps 201 guided driven in a vertical plane around. Behind the inlet area e are above the table 4.1 two strip-shaped side guides 4.4 . 4.5 provided, which has long holes 4.6 are adjustable in their distance from each other and at an angle to the conveying direction. These side guides 4.4 . 4.5 have the task of the products P ₁ . P ₂ . P ₃ , P ₄ transverse to the conveying direction F ₂ to push together and on the table 4.1 align. From the stopper 202 becomes the first group G ₁ in rows of adjacent products P ₁ . P ₂ . P ₃ . P ₄ released, leaving her on the table 4.1 reach. The following group G ₂ of products P ₁ . P ₂ . P ₃ , P ₄ is then held for a defined time while the first product group G ₁ on the slide 4.2 adjacent to be further promoted. Is the defined distance a between the product groups G ₁ . G ₂ adjusted, the stopper gives 202 the product group G ₂ free, then in the distance a behind the first product group G ₁ at the higher slider 4.3 lying in the conveyor unit 4.1 , 4.2, 4.3. These two product groups G ₁ . G ₂ become a stack St formed as based on 5 is described:

image 1 shows the beginning of gripping the first product group G ₁ on the slider 4.2 adjoining behind the slider 4.3 adjacent product group G ₂ is conveyed under the truck. The rear gripper 220 touches the front product group G ₁ first and release them from the slider 4.2 , The front gripper 210 will also be added to the product group G ₁ created. The grippers 210 . 220 are square in cross section and are provided by the timing chain the application about its longitudinal axis B slightly twisted, causing the alignment of the contact surfaces of the gripper 210 . 220 is absolutely parallel to the product group G ₁ sure to grab.

image 2 shows that the gripper 210 . 220 the first product group G ₁ off the table 4.1 have lifted off, because the traction means 232 / 237 . 242 / 247 Meandering in the envelopes 231 / 238 . 241 / 248 are guided and initially predominantly in the vertical direction F ₄ be guided so that they are in relation to the conveying direction F ₂ be delayed and the slide 4.2 under the first group G ₁ passes.

In the further course shows picture 3 that the following product group G ₂ starts, from the conveyor unit 4.1 . 4.2 . 4.3 under the raised front product group G ₁ to be promoted, what is in the picture 4 is further clarified. The inversion of the arc in the envelope will now occur for the raised product group G ₁ also a movement in the conveying direction F ₂ so that it accelerates again in its horizontal speed. At the inversion becomes, like picture 5 shows the upper product group G ₁ towards the lower product group G ₂ , unchanged at the slide 4.3 is applied, hung up.

Figure 6 shows the stack formed St , The higher slider 4.3 is, as this picture illustrates, higher than the thickness of the product group G ₂ so that he is also at the top product group G ₁ is present and can center them if necessary, if necessary. To release the gripper 210 . 220 from the pile St These are again by their longitudinal axis by means of the timing chain B twisted, with the front gripper 210 clockwise and the rear gripper 220 is rotated counterclockwise. The twist is minor and is just to make sure that the grippers 210 . 220 from the pile St can solve if they are forcibly guided in a vertical direction F ₄ be carried away. From the conveyor unit 4 becomes the pile St then further promoted to the device 300 for welding and subsequent shrinking in the shrinking furnace 400 ,

An alternative embodiment of a stacker is shown in FIGS 4 .1 and 4.2 are shown. Opposite the in 3 shown embodiment, this truck differs in that on the traction means ( 232 . 242 ) parallel spaced grippers ( 250 . 260 ), which are transverse to the conveying direction ( F ₂ ) are mounted displaceably. The grippers ( 250 . 260 ) extend longitudinally to the table ( 4.1 ). Are they by moving the rods ( 251 . 261 ), at the free ends of which they are arranged, move towards each other, they can create a product group ( G ₁ . G ₂ ) grip and lift laterally, as shown by the sequence in 5 is described. The displacement of the rods ( 251 . 261 ) can be via a control cam (not shown) or at the ends ( 233 . 243 ) raised elevations (not shown). The length of the gripper ( 250 . 260 ) is as well as the length of the gripper ( 210 . 230 ) the products ( P _i ) customized.

Einschweißvorrichtung

The welding device 300 is behind the truck 200 at the end of the conveyor 5 arranged on which the stacks St on one on the conveyor belt 5.1 lying film web 60 in the conveying direction F ₂ be transported. Instead of the pile St could also product groups G _i or individual products P _i be conveyed and welded in succession. Before the welding device 300 gets on the top of the pile St a second film web 61 hung up with the first film web 60 should be welded so that the film webs 61 . 60 severed and individual packs are created. The welding device 300 consists of the frame 320 and the support slidably mounted therein in the vertical direction V. 310 around a rotation axis D rotatable in the frame 320 is stored. The holder 310 consists of two parts 311 . 312 parallel to the axis of rotation D are arranged, and their distances a ₁ . a ₂ to the axis of rotation D are adjustable. The welding units 318 . 319 that are effective on the outside, can be in the simplest case heatable wires to the films 60 . 61 to weld together.

The two parts 311 . 312 are over longitudinal guides 313 . 314 connected together and by moving the parts 311 . 312 the axis of rotation D or to each other, the distances a ₁ . a ₂ set, so that's how 7 and 8th show a large effective diameter (turning diameter) or like the 9 and 10 show a small effective diameter (turning diameter) can be set. By comparing the 7 and 9 together it will be seen that in the 7 large effective diameter of the welding device 300 larger and longer stacks St in the two slides 60 . 61 can be welded, while with the smaller effective diameter, as in 9 Shown is smaller and shorter containers G _i in the slides 60 . 61 can be welded.

The holder 310 is about the electric motor 330 around the axis of rotation D driven in rotation. The setting of the distances a ₁ . a ₂ can be done by electric motor or manually.

Due to the adjustable distances a ₁ . a ₂ the welding units can be created the rapport distance in conjunction with the sliding storage (height device V), which is required by the respective product group.

Through a U-shaped design of the welding units, the packages in the welding plane between the two welding tools can dip. As a result, the container can stand closer together, whereby a lower film consumption is realized. This leads to the visually appealing container.

LIST OF REFERENCE NUMBERS

1

promoter

2

promoter

3

promoter

4

promoter

4.1

table

4.2

pusher

4.3

pusher

4.4

cornering

4.5

cornering

4.6

Long hole

5

promoter

5.1

conveyor belt

60

foil

61

foil

100

allocation

110

top

111

idler pulley

112

idler pulley

113

belt

114

Rack / toothed belt

115

drive motor

120

stand Body

200

forklifts

201

carrier

202

stopper

210

grab

211

pole

220

grab

221

pole

230

frame

231

envelope

232

traction means

233

wall

234

idler pulley

235

idler pulley

236

idler pulley

237

traction means

238

envelope

239

envelope

240

frame

241

envelope

242

traction means

243

wall

247

traction means

248

envelope

249

envelope

250

grab

251

pole

260

grab

261

pole

300

Device / welding device

400

shrink oven

310

bracket

311

half

312

half

313

longitudinal guide

314

longitudinal guide

318

welding unit

319

welding unit

320

frame

330

electric motor

A

discharge area

B

longitudinal axis

D

axis of rotation

e

intake area

F _B

Förderbereich

F ₁

conveying direction

F ₂

conveying direction

F ₃

conveying direction

F ₄

conveying direction

G _i

group

G ₁

group

G ₂

group

P ₁

product

P ₂

product

P ₃

product

P ₄

product

P _i

product

R ₁

line

R ₂

line

R ₃

line

R ₄

line

S

route

S ₁

first outer position

S ₂

second outer position

St

stack

a

distance

a ₁

distance

a ₂

distance

α

angle

β

angle

Claims (10)

Device for welding in individual products (P ₁ , P ₂ ,... P _i ) conveyed one behind the other in a conveying direction (F ₂ ) or product groups (G ₁ , G ₂ ) formed from individual products (P _i ) or from several product groups (G _i ) combined stacks (St) in foil (60, 61), with at least two welding units (318, 319) which are arranged in a about an axis of rotation (D) rotating holder (310) parallel to the axis of rotation (D), and the parallel distance (a ₁ , a ₂ ) of the welding units (318, 319) to the rotation axis (D) is adjustable. Device after Claim 1 , characterized in that the distances (a ₁ , a ₂ ) are independently adjustable. Device after Claim 1 Characterized in that the spacings (a _1, a ₂₎ are equal in magnitude, so that the welding units (318, 319) relative to the rotational axis (D) are arranged diametrically in the retainer (310). Device according to one of the preceding claims, characterized in that the holder (310) of a first part (311) and a second part (312) is formed and both parts (311, 312) in at least one longitudinal guide (313, 314) relative are mutually displaceable. Device after Claim 4 , characterized in that the two parts (311, 312) are mutually displaceable by an electric motor. Device according to one of the preceding claims, characterized by an arrangement above a conveyor (5). Device after Claim 6 , characterized in that a conveyor belt (5.1) of the conveyor (5) is the abutment for the welding units (318, 319) during welding. Device according to one of the preceding claims, characterized in that the products (P _i ), product groups (G _i ) and / or stacks (St) in two film webs (60, 61) are welded. Device according to one of the preceding claims, characterized in that the welding units (311, 312) are heatable wires or ultrasonic units. Device according to one of the preceding claims, characterized in that the holder (310) in a frame (320) in the vertical direction (V) is displaceably mounted.

Images