DE3118946A1 - DEVICE FOR SEPARATING Trough-shaped, deep-drawn, filled plastic packs from the film webs - Google Patents

Description

Device for cutting trough-shaped deep-drawn, filled plastic packs from the film webs

The invention relates to a device for separating trough-shaped, deeply zajanen filled plastic packs of film webs, consisting of a column guide frame with exchangeable upper and lower tools.

In known devices of this type, which are preferred, but not exclusive, use at the outlet of a deep-drawing packaging machine are arranged so far mainly complete cut punches used, which consist of a die and a male die. Although this punching system has a high cut quality, but it has various serious disadvantages, which are a general Opposite use in deep-drawing packaging machines. On the one hand, high costs are required for the production of the tools, especially for maintenance reasons a second sentence must always be kept ready. For others, the format changeover is time-consuming and places high demands on the operating personnel. For this reason, complete cut punches are used in deep zi'eh packaging machines, which have to fulfill constantly changing packaging tasks are used relatively rarely.

Rounded corners can also be combined with a

Use of so-called cracking and slow-speed devices produce. In this context, cracking refers to cross cutters that use the crush cut process, straight and by inserting punch-like tools work. However, the quality of the cut is often not sufficient because of the precise coordination of the longitudinal cutting line on the middle of the corner radii is difficult.

Knowing this state of the art, the invention is based on the object of avoiding the given up Disadvantages of designing the device of the type mentioned at the outset in such a way that a high cut quality in the case of packs is guaranteed with any circumferential contour, whereby.die The service life of the tools should be long and their manufacturing costs should be low.

This object is achieved according to the invention by the features indicated in the characterizing part of the main claim. With regard to preferred embodiments of the device according to the invention, reference is made to the features of the subclaims referenced.

According to the invention, a cutting glasses is arranged on the lower yoke plate as a lower tool, while under the middle plate is held with a steel strip cut with the cutting edges pointing downwards. The punch stroke is the Cutting glasses encompassing the hollows of the packs from ' at the bottom against the seam area of the foils and with

this can be pressed against the steel strip cut.

According to a preferred embodiment of the invention, a stroke limiter for the end of the cutting position Cutting glasses provided, preferably the stroke limitation of at least two on the lower yoke plate arranged stroke limitation blocks with at least two stop plates arranged under the middle plate are feasible to the system. The stroke limiting blocks and the cutting glasses as well as the stop plates are useful and the steel strip cut are each carried out at the same height.

Preference is given below to those in the punching position Packs in the area of the central free spaces of the cutting glasses Arranged support tables for the packs, the holders of which reach through the lower yoke plate, the Holders can be attached to a crossbeam carried stationary by the machine frame. For the drive is preferred a hydraulic piston / cylinder unit is provided, the hydraulic cylinder being attached to the upper yoke plate is, while the piston rod is supported on the center plate, with the lower yoke plate parallel via guide rods mounted in the middle plate and connected to both yoke plates can be guided upwards in the direction of the middle plate. The guide rods are preferably over in the center plate provided sliding bushes held displaceably in the axial direction.

This has made it possible to create a device for separating ■ the plastic packs from the film webs, which ensures a high level of functional reliability and service life. The glasses-shaped lower tool is not subject to wear and tear and is inexpensive in a simple manner to get. Steel strips, which are punching knives in wood or plastic surround, serve as the upper tool acts, whose manufacturing costs are relatively low and whose service life is long. ·

As a result of the stroke limitation provided according to the invention, the cutting edge of the punching knife does not touch the cutting glasses, so that this has no effect on the duration of the sharpness of the punch knife. The steel strips are cut to the Outer contours of any design of the packs can be easily adapted.

In addition, the device according to the invention is suitable for making perforations, which is the case with conventional complete cutting systems was not possible.

Further advantages, details and features essential to the invention emerge from the following description a preferred embodiment of the invention below Reference to the accompanying drawings. It shows in detail:

Fig. 1 is a side view of the invention

'β

Device, partly in section, with the device in the open position is located

FIG. 2 shows a cross section through the device shown in FIG. 1 in the punching position and FIG

3 shows the top view of the device according to the invention, partly in cut.

The device according to the invention is preferably located at the outlet of a thermoforming packaging machine, that is in the direction of travel behind the sealing station for the upper track. Located on a base 20 with anti-vibration metal feet 21 a column guide frame consisting of a middle plate 12, a lower yoke plate 13, an upper Yoke plate 14 and guide columns Ib, which are displaceable by sliding bushes 16 arranged in the middle plate 12 are held.

The subframe 20 is located on both sides of the machine frame 19. The film transport chains 1 of the packaging machine run between the middle plate 12 and the lower one Jochp.latte 13, so that the film web with the filled packs 2 in the machine cycle in each case a preferred length in the punching position of the packs 3 are required.

During the punching process, the lower yoke plate is over the

Guide pillars Ib from the upper yoke plate 14 by means of a hydraulic cylinder 17 and a piston rod 18 guided upwards. The cutting glasses serving as the lower tool 9 first receives the trough of the packs 3 in its central free spaces and then presses the welded one Foil web in the area of the weld seams against the steel strip cut 8, so that the packs are separated will. The packing trays are placed on the support tables 22, which are located below the punching position of the packs 3 in the central free space area of the cutting glasses

9 are arranged. The support tables 22 are from vertical holders 23 are carried, each of which passes through a hole in the lower yoke plate 13. With your At the lower end, the holders 23 ″ are attached to a cross member 24, which connects to the frame 19 of the packaging machine manufactures.

The stroke of the cutting glasses 9 against that as a steel strip cut formed punching knife 8 is due to the impact of the 'the lower yoke plate 13 attached to the stroke limiting blocks

10 so dimensionally limited to the stop plates 11 held by the middle plate 12 that the cutting edge of the Punch knife 8 completely severed the film. · However is not damaged by the cutting glasses 9 .. The punching knife '8 and the stop plates 11 are exactly the same height. This also applies to the cutting glasses 9 and the stroke limiting blocks 10.

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The film network 5 remaining between the individual packs during punching is behind the punch from the Film transport chain 1 released and pulled off by means of a film net winding device 6 and wound up. The removal belt 7 promotes the punched out. Packs of 4 from the machine.

Through recesses in the cutting edge of the punch knife 8 connecting webs can also be punched out between the individual pieces Packs 4 remain, which may simplify the execution process for the packs .. ■

The hydraulic drive takes place by means of a hydraulic unit consisting of a motor 29 and a hydraulic pump 28, which is located in a hydraulic oil tank 30. The hydraulic system also includes a pressure relief valve 31, a pressure gauge 32, and a solenoid control slide 27, hose lines 26 and hydraulic lines 25 to the hydraulic cylinder 17. The electrical control takes place depending on the workflow functions of the deep-drawing Packaging machines.

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Claims (10)

ο ι ι υ J η ο DR. KARL TH. HEGEL 1IALBMONDSWEG 49 2000 HAMBURG 52 TELEPHONE (040) 8806463 DIPL.-ING. KLAUS DICKEL JUUUS-KREiS-STRASSl 33 8000 MUNICH 60 TELEPHONE (089) 885210 APPROVED BY THE EUROPEAN PATENT OFFICE TtLl-CiRAMM-AI) RESSI: I) OI LLNFR-PAI INI MUM 111 N 11 RNSCIIRI IHl R ^; IA 7.WiiMl il. IiIR / LK HIN LNSLR / HlCHHN H 314b 8000 MUNICH, DEN Krämer & Grebe GmbH & Co KG P.O. Box 214y 3b6O Biedenkopf-Wallau Device for cutting out trough-shaped deep-drawn, filled plastic packs from the film webs Patent claims: l. ¹ device for separating trough-shaped, deep-drawn, filled plastic packs from the foils, consisting of a column guide frame with
exchangeable upper and lower tool, thereby HOSTSC11K ACCOUNT. HAMBURG 29122U-2U5 BANK I) RhSDNERBANK Au. HAMBURG KTO-NR 3813897 (BL / 20080000) MAIL ACCOUNT: MUNCHIiN 888-802 BANK »LUrsCHL BANK ACi, MUNCHHN ACCOUNT NO. 6681001 (BL / 700701) 10) marked that on der.unteren yoke plate (13) arranged as a lower tool a cutting glasses (9) and under the middle plate (12) one with the cutting edges downward directed steel strip cut (8) is held, with the punching stroke the cutting glasses (9) the hollows of the packs (3) can be guided from below against the seam area of the foils and with these can be pressed against the steel strip cut (8) is. 2. Apparatus according to claim 1, characterized in that a stroke limiter at the end of the cutting position (10, 11) is provided for the cutting glasses (9). 3. Apparatus according to claim 2, characterized in that the stroke limiter consists of at least two on the lower yoke plate (13) arranged stroke limiting blocks (10) with at least two under the Central plate (12) arranged stop plates (11) can be guided to the plant. 4. Apparatus according to claim 3, characterized in that that the stroke limiting blocks (10) and the cutting glasses (9) are designed to be at the same height. 5. Device according to claims 3 or 4, characterized characterized in that the stop plates (11) and the steel strip section (8) are made at the same height. 6 .. device according to one of the preceding addresses, characterized in that below the packs (3) in the punching position in the area of the central free spaces of the cutting glasses (9) support tables (22) are arranged, the holder (23) reaching through the lower yoke plate (13). 7. Apparatus according to claim 6, characterized in that that the holder (23) on a crossbeam carried in a stationary manner by the machine frame (19) (24) are attached. 8. Device according to one of the preceding addresses, characterized in that a hydraulic piston-cylinder unit (17) is provided as the drive is. 9. Apparatus according to claim 8, characterized that the hydraulic cylinder (17) is attached to the upper yoke plate (14) while the piston rod (18) is supported on the middle plate (12) ', the lower yoke plate in the course of the punching process (13) over in the middle plefcte (12) and with both Guide rods (15) connected to yoke plates (13, 14) can be guided parallel upwards in the direction of the central plate (12) 10. The device according to claim 9, characterized in that that the guide rods (15) via slide bushings provided in the middle plate (12) (16) are held displaceably in the axial direction.