WO1982000306A1

WO1982000306A1 - Method and device for obtaining rectangular plates of sheets of material,particularly for textile floor carpets

Info

Publication number: WO1982000306A1
Application number: PCT/CH1981/000079
Authority: WO
Inventors: Ag Rottermann
Original assignee: Rottermann R
Priority date: 1980-07-17
Filing date: 1981-07-14
Publication date: 1982-02-04
Also published as: EP0056036A1

Abstract

The method and the device for its implementation allow the manufacture, from sections of carpets, of plates and specimens of moquettes and carpets having precise dimensions and angles. In a first step the material is aligned with respect to a longitudinal edge on a dressing table (3) provided with oblique rolls (4) and cut along its length in several strips of the same width by means of several rotating circular knives disposed within an enclosure (7). In a second step, the strips are brought edgewise and without slipping towards a transversal cutting device (26) where they are cut in plates by a knife working on a hard surface. The cutting operation is controlled by a pulse control coupled to the feeding device in accordance with the feeding. Devices (32 to 36) for dressing, cleaning, labelling and stacking of the plates or specimens of moquettes are disposed after the transversal cutting device. The material is fed continuously in both step.

Description

^* Process for the mechanical production of rectangular sheets from flat goods, in particular from textile floor coverings, and installation for carrying out the process *

The invention relates to the production of. rectangular sheets of flat goods, in particular of textile floor coverings, e.g. from carpet slabs to form a floor covering or from carpet sample pieces to show off.

Carpet sample pieces or carpet slabs must be cut to size and have edges that run at right angles to one another, so that on the one hand they fit into a size-fixed sample collection and on the other hand they fit together seamlessly during the mosaic-like assembly. The cut edge of carpet panels must also be clean and regular with regard to the pile material. Carpet sample pieces also require post-processing, which consists in preparing the panels at the cut edges by chamfering the pile from the pile with an edge cutter in order to prevent fraying. In addition, the plates must be cleaned of dust and fiber snippets that are produced during cutting and preparation. The finished plates are then labeled and kept in stacks for further use.

Most difficult is the tailored cutting of the plates, especially if the method used for this purpose is also supposed to be economically viable in large numbers. In this regard, the previously known trimming methods have considerable shortcomings. Usually it is wiped from a role led to a stop that can be adjusted to a certain distance from the intended cutting line, whereupon the cut

•> neither with machine shears nor with a rotating circular knife moving along the cutting line. With this method, therefore, the web of material must be stopped for each cutting process, firstly because of the adjustment of the length of the length of the web to be cut off (corresponding to the desired strip width) and secondly because of the relatively long duration of the cutting process. Such a discontinuous mode of operation is very time-consuming and involves a high expenditure of material and energy when it is carried out mechanically. In addition, the dimensional accuracy of the cut leaves a lot to be desired in this process, if no additional means are used to ensure that the goods do not warp during the cutting process, which is due to the gradual progress along the intended cutting line, especially with Ver ¬ use scissors, otherwise can easily happen. In general, any shearing process based on shear is unsuitable for cutting carpet goods, which consists of base material and pile material, since experience has shown that a clean cutting edge cannot be achieved in this way.

The invention now relates to a method for the mechanical production of rectangular plates from flat goods, in particular from textile floor coverings, which enables plates to be cut to size and cleanly * in continuous work processes. The invention also relates to a plant for carrying out the method. The invention is defined in the claims.

A special embodiment of the system according to the invention is a production line for the production of carpet pieces, which consists of two

Street sections include all workstations - (cutting, preparing, cleaning, labeling and stacking) in order to produce finished sample pieces that can be put together immediately to sample collections, so that no further post-processing is required.

Carpet slabs for laying on floors can also be produced on the same production line, in which case the work stations are not used for the preparation.

Such a production line for the production of carpet sample pieces is shown schematically in the drawing as an example of the invention, namely:

1 shows the floor plan of the first road section, FIG. 2 shows a longitudinal section of the strip cutter, FIG. 3 shows the partial floor plan of the second road section, FIG. 4 shows the floor plan of the cross cutter and the associated feed device, FIG. 5 shows a detailed view of the cross cutter 6 is a view of the cross cutter from the feed side,

7 is a view tung ^* Fig. An edge router in Förderrich¬, Fig. 8 shows a cross section of the edge milling cutter, Fig. 9 shows the cross section of a brushing machine, and Figure 10 is a longitudinal section thereof. In the first section of the road, the carpet web 2 unwound from a roll 1 reaches a horizontal straightening table 3, which has a multiplicity of rolls 4 supporting the carpet web, which are mounted obliquely in frame parts 5 and at an acute angle to an am have a longitudinal edge of the straightening table 3 arranged ruler 6. The moving carpet 2 is pushed against the straightening ruler 6 by the inclined rollers 4 and in this way aligned so that the one longitudinal edge of the carpet 2 always slides along the straightening ruler 6. The straightening table also serves as a goods inspection table.

In the subsequent strip cutter 7, the continuously advanced carpet web 2 is cut lengthwise by multiple cutting into strips, which are wound up side by side in a roll-up dock 8.

The strip cutter 7 shown in FIG. 2 works with a plurality of rotating circular knives which engage in circumferential grooves of a mute roller 9. A motor 10 is used to drive the grooved roller 9, which at the same time drives the belt conveyor 11 for pulling in the carpet web. The strip cutter is set up for the production of carpet strips with three different, selectable strip widths. For this purpose, three knife shafts 13, 14 and 15 are arranged at the same circumferential spacing on each switching drum 12, each carrying a number of circular knives 16, 17 and 18, respectively. The circular knives have the same spacing on each knife shaft, but different distances from those of the other knife shafts. All three knife shafts 13, 14, 15 are driven together by a motor 19. The power transmission from the motors 10 and 19 takes place

e.g. by chains or chain straps 20, 21 or, 22.

To convert the strip cutter 7, the switching drum 12 is rotated by 120, with the help of a crank 23 which can be fixed in the working position of the cutter shafts and which engages with a pinion 24 in a gearwheel 25 on the switching drum 12.

In this first section of the road, the entire carpet web 2 can be cut in one go into a plurality of strips of the desired width with a high degree of dimensional accuracy.

The second section of road includes as shown in FIG 3 in the conveying direction seen in sequence following Arbeits¬ stations. A cross cutter 26 is withdrawn with the to gehö¬ in power feeding device 27, which processing, the strip from the roll ^'28 via a deflecting and Spannvorrich¬ 29 and feeds the cross cutter without slippage; along a guideway 31 provided with continuously operating feed devices 30, four edge cutters 32 arranged one behind the other for backing up the plates, only the first and the last of which are shown; two-brushing machines 33 and 34. for cleaning the top and bottom of the plates; a labeling machine 35 of a type known per se; and a stacking device 36 with a horizontal stacking path 37. Between the edge milling cutters 32 there are tilting devices, not shown, which each turn the plates by 90, so that the next one

Edge millers can machine another plate edge. Facilities for this purpose are known per se and are not described in detail here. Throughout the entire second stage of the process, the strips supplied and the plates cut from them are in upright position, wherein the guideway 31 can either - as shown - be vertical or be slightly inclined backwards.

The cross cutter 26 according to FIGS. 4, 5 and 6 essentially consists of an eccentric press which is equipped with a punching knife 38 which works against a hard surface 39. According to FIG. 5, the punching knife 38 is clamped with screws 40 on the yoke 41 of the eccentric press, which is moved back and forth, and is supported on the rear by adjusting screws 42. A motor 43 is used to drive the eccentric press, which drives the shaft 45 with the two eccentric disks 46 via a clutch 44, which in turn are in operative connection with connecting rods 47 with the push rods 48 on the yoke 41. Between the movable yoke 41 and the hard base 39 spring means 49 are coaxial to the push rods 48, e.g. A number of disk springs each are provided, which catch the moving mass in the area of the lower dead center during the cutting process and at the same time cancel any play in the drive parts in order to ensure that the cutting edge 50 of the punching knife 38 touches the hard one until it is completely touched Underlay, but a rivet effect on the knife edge is prevented. A bar made of hardened steel is preferably used as the hard base. 6, the lower leading edge for the goods is indicated at 71.

In addition to the punching knife 38, a hole punching device 51 with one or more interchangeable punches 52 is also mounted on the yoke 41. If necessary, it is actuated simultaneously with the punching knife 38 in order to provide the plates with a punched hole. The feed device 27 of the cross cutter 26 indicated in FIG. 3 comprises, according to FIG. 4, two belt conveyors 53 and 54 arranged on both sides of the punching knife 38 for the supply of the strips or for the removal of the plates. Each belt conveyor has two conveyor belts 56, 57 and 58, 59 receiving the goods 55 between them, of which one conveyor belt 56 or 58 along a stationary support 60 or 61 and the other conveyor belt 57 or 59 along a conveyor belt. length 62 or 63 is guided at a variable distance from the relevant fixed support. The supports 60 and 62 of the feeding belt conveyor 53 are shaped in such a way that the relevant conveyor belts 56 and 57 run in a wedge shape with respect to one another on the inlet and outlet sides, so that entrainment elements provided on the conveyor belts, for example transverse ribs, are approximately perpendicular towards the transported goods and move away from them. The slip-free supply of the goods can also be supported by the fact that certain mandrels are provided on the conveyor belt 56 of the feeding belt conveyor 53 to penetrate the goods. The carriers 64 and 65 of the two conveyor belts 57 and 59, which can be displaced transversely to the feed direction and are connected to one another in terms of drive, are preferably guided loosely and connected to one another by a link 66, whereby the link to the

Contact pressure to be exercised e.g. is applied by spring means, not shown.

The conveyor belts 56, 57 of the feeding belt conveyor 53 are driven in a slip-free manner via chains or chain belts 67, 68 by a motor 69, and these conveyor belts themselves are also designed in the manner of chain belts, so that the feed path of the conveyor belts 56, 57 is exactly proportional the rotor rotation angle of the motor 69. With the motor 69 is over the chain belt 67 is coupled to a generator 70 as a clock generator, which, owing to the non-slip relationship with the belt conveyor 53, generates a clock pulse sequence with a pulse frequency proportional to the feed speed of the conveyor belts 56, 57 and thus to the goods 55, either directly or via a pulse shaper. In a pulse counter circuit, which is not described in more detail, a control pulse for actuating the clutch 44 of the cross cutter 26 is generated after counting a selectable number of clock pulses. The preset number of the counted clock pulses is therefore a measure of the feed path covered and thus of the length of the strip piece cut off in each case. With guaranteed freedom of slip between the rotary movement of the generator 70 and the feed movement of the goods 55, a high dimensional accuracy of the plates produced can be achieved in this way.

In connection with the cross cutter 26, devices (not shown) are expediently provided which remove parts and portions of the goods from the feed path.

7 and 8 are located in the region of a lower guide edge 71 of the guide track 31 and are expediently pivotable about this guide edge in order to adjust the angle of inclination of the slab edge to be achieved with the edge cutter to the desired requirements -. to be able to adapt.

Each edge milling cutter has a cutter head 73, which is driven by a motor 72 and has helical knife edges 74 which contact the cutting edge of an adjustable feed knife 75 without contact work together. A prerequisite for such a low-wear mode of operation is an unbalanced running of the rotating one. Part of the edge milling cutter and an absolutely rigid assembly of the adjusting knife 75 with respect to the engine block, for example with the aid of strong mounting plates 76 and 77. The knife combination can be ground in in the reverse direction of the knife head 73. For the rest, the cutter head 73 is arranged within a suction box 78, which has a connecting piece 79 for a suction fan for extracting the cutting waste generated during edge milling.

The carpeting sample piece 80, which is moved past the edge milling cutter 32, is fed to the guideway by the continuously working feed device 30 in the form of a belt conveyor 82 mounted on the carrier 81

31 guided along, the carpet pile being directed against the guideway. A number of guide springs 83 are now provided on the guideway 31 in the region of the edge mill 32, and run from the attachment point 84 in the feed direction (arrow 85) at an acute angle against the lower guiding edge 7-1 of the guideway. By intervening in the carpet pile, these guide springs push the moving carpet sample against the leading edge, so that the pile along the adjacent one

Carpet edge is held in the working area of the cutter head 73 of the edge milling cutter or supports a corresponding effect of the feed device. This measure can be used in particular when finishing small sample pieces or narrow strips, e.g. Skirting strips, be useful.

The edge milling cutter 32 and the associated feed devices 30 are preferably variable in their working speed in order to adapt them on the one hand to enable the respective type of goods and on the other hand to the clock of the cross cutter 26.

Öie in the-Fig. Brushing machine 33 shown in FIGS. 9 and 10 for cleaning the front of the plates, in the present example thus the pile side of the carpet. sterstücke, has two rotating brush rollers 86, 87, the bristles of which run counter to one another on the working plane 88, so that the thrust forces exerted on the plates to be cleaned cancel each other out. This measure is important in view of the required high effectiveness of the brushing machine, which is aimed at the one-time passage of the plates. The brush rollers 86, 87 are arranged in a housing 89 which closely surrounds them and is connected to a suction channel 91 on the side facing away from the working plane 88 by a slot-shaped connecting channel 90 between the brush rollers. On the other hand, the housing 89 extends to the working plane 88 except for an air inlet slot 92 provided on the goods supply side. An air duct 93 connects to the air inlet slot 92. As a result, the air supply is independent of the density of the pile of the carpet sample pieces that are guided past the brush rollers along the working plane 88. The housing opening on the working plane is preferably spanned with wires 94, which prevent the goods from being drawn into the housing 89 and prevent the feed movement.

In order to increase the suction effect in order to remove the particles brushed off from the carpet sample pieces, it is advantageous to throttle the air flow, which in addition to the plates to be cleaned can get into the housing 89 or into the suction channel 91. For this purpose, for example, the conveyor belt can be assigned to the brushing machine 33. Neten feed device 30 be so wide that it also covers the part of the housing opening not covered by the plates. In addition, a displaceable, for example hanging from a chain 95, pull-up and lowerable end wedge 96 is provided in the suction channel 91, with which the suction effect can be limited to a channel width corresponding to the respective strip width.

The brushing machine 34 for cleaning the underside of the plate can be constructed in a similar way to the brushing machine 33 described. However, a single brush roller can be used here.

The labeling machine 35 and the stacking device 36 can be of a construction known per se and are not described in more detail here.

Claims

1. A method for the mechanical production of rectangular ^'sheets of flat goods, in particular textile floor coverings, characterized in that directed that the goods aus¬ in a first process stage in a horizontal position by one of their longitudinal edges and subsequently by multiple cutting lengthwise in strips is cut, and that in a second process stage the strips are successively cut into plates by printing in a raised position, the goods being continuously advanced in both process stages.

2. The method according to claim 1, characterized in that the plates are prepared in the second procedural stage at a constant feed position on all four edges and then brushed, labeled and stacked in the horizontal direction.

3. Plant for carrying out the method according to claim 1, characterized in that in a first part of the plant a horizontal straightening table (3) with the goods-carrying, inclined rollers (4) at an acute angle to a straightening ruler (6) on one Longitudinal table edge, furthermore a strip cutter (7) with a plurality of rotating circular knives (16, 17, 18) engaging in circumferential grooves of a grooved roller (9), and a cross cutter (26) with one against one in a second part of the system hard base (39) working punch knife (38) and a feed device (27) for slip-free feeding of the strips (55).

OMPI

4. Plant according to claim 3, characterized in that following the cross cutter (26) along a continuously working feed device (30) provided with guideway (31) four successively arranged edge milling cutters (32) for equipping the plates and tilting devices arranged therebetween for rotating the plates, two brushing machines (33, 34) for cleaning the top and bottom of the plates, a labeling machine (35) and a stacking device (36) with a horizontal stacking path (37) are provided.

5. Plant according to claim 3, characterized in that the strip cutter (7) has a plurality of knife shafts (13, 14, 15) arranged on a switching drum (12) and having circular knives (16, 17, 18) Optionally work with the grooved roller (9), the circular knives on each knife shaft being the same, but at different distances from those of the other knife shafts.

6. Plant according to claim 3, characterized in that the feed device (27) of the cross cutter (26) has two belt conveyors (53, 54) arranged on both sides of the punching knife (38) for the supply of the strips (55) or for comprises the removal of the plates and that the feeding belt conveyor (53) has wedge-shaped entrainment elements.

7. Plant according to claim 6, characterized in that the one conveyor belt (56) of the feeding Band¬ conveyor (53) to penetrate into the goods certain thorns.

8. Plant according to claim 3, characterized in that a clock generator (70) is coupled to the feed device (27) for the feed of the strips (55) to the cross cutter (26), which proportion a clock pulse sequence with a feed rate and that a Im¬ pulse counting circuit is provided ¬ generated tional pulse frequency, each of which after counting a selectable number ei¬ clock pulses emits NEN control pulse for actuation of the cross cutter, whereby the number of counted Taktimpul¬ se ^'a measure of the distance traveled feed path and represents for the length of the cut strip piece.

9. Plant according to claim 3, characterized in that the cross cutter (26) for driving the punching knife (38) has an eccentric press (40 to 50), the moving mass of which is absorbed by spring means (49), which at the same time any Remove play in the drive parts to ensure that the cutting edge (50) of the punching knife is brought up to full contact with the hard surface (39), but a riveting effect on the knife edge is prevented.

10. Plant according to claim 3, characterized in that a hole punching device (51), which is actuated simultaneously with the punching knife (38), is coupled to the cross cutter (26) in order to provide the plates with a stitching hole.

11. System according to claim 3, characterized in that the edge cutters (32) arranged in the area of a lower guide edge (71) of the guide track (31) have a rotating cutter head (73) Have helical knife edges (74) which cooperate with the cutting edge of a feed knife (75) without contact.

12. System according to claim 11, characterized in that the cutter head (73) is arranged within a suction box (78) for removing the cut waste.

13. Plant according to claim 11, for the processing of pile carpet, characterized in that in. Region of the edge cutter (32) are provided on the guide track (31) Leitfedern (83) formed in ^'Vor¬ thrust direction in an acute angle against the lower guide edge (71) of the guide track run and by engaging in the carpet pile the goods against the * guide edge -drive so that the pile is held along the adjacent edge of the fabric in the working area of the edge mill.

14. Plant according to claim 3, characterized in that ^' the brushing machine (33) for cleaning the plate front has two rotating brush rollers (86,87), the bristles of which run counter to each other on the working plane (88), and that the brushes rollers are arranged in a closely surrounding housing (89), which is connected on the side facing away from the working plane by a slot-shaped connecting channel (90) with a suction channel (91) and on the opposite side except for one on the wa - Air inlet slot (92) provided on the supply side reaches the working level, an air duct (93) connecting to the air inlet slot. ^'

15. Plant according to claim 14, characterized in that the housing opening on the working plane (88) of the brush rollers (86, 87) is spanned with wires (94) which prevent the goods from being drawn into the housing (89).

16. System according to claim 14, characterized in that a displaceable final wedge (96) is provided in the suction channel (91) with which the suction effect can be restricted to a channel width corresponding to the respective strip width.