DE2354148A1 - DEVICE FOR PRE-COMPRESSING AND PRESSING FIBER MATERIAL INTO A BALE AND PROCESS FOR PRE-COMPRESSING AND PRESSING THE FIBER MATERIAL INTO A FIBER BALE - Google Patents

Description

DR. M ULLt: H "BMH w ur ^ mip, l-π, _mn j. Κ-. -> · - - ■

DIPL ..- INQ. FINSTERWALD PIPPING. GRÄMKOW

PATENT AGENCIES .. '2 3 V 4 1 48-

Munich, 29th GKT, M / Sv - B 1155

masghtjieniibrik; ■ iieeer ag

CH-8406 Winterthur / Sehw.

Device for pre-compacting and pressing fiber material into a bale as well as processes for precompaction and pressing of the fiber material into a "fiber ball

The invention relates to a device for pressing fiber material to a bale, which has a known baling press, and a fiber collection shaft arranged above it an air-permeable, but fiber-retaining inner jacket, for taking up and venting a pneumatically conveyed Fasermaierials as well as with an inner jacket that essentially encloses Has an outer jacket with an air outlet opening, as well as a. Process for pre-compacting and pressing fiber material into a fiber ball. '

Devices for pressing fibrous material are already known, in which the fiber material is conveyed into a press box. To vent the material conveyed into this press box this, provided with a large number of openings, as well as with one, cloak held at a certain distance, which is surrounded by

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Telephone (0531) 73887. Telephone (0811) 293645, Telex 5-22050 mbpat Bank: Central Misee Bayer. People's banks. Munich, account number 9822 Post check: Munich 95495

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a suction fan connected to it is kept at negative pressure will. This negative pressure creates a certain pre-compression of the material conveyed into the press box.

Basically fiber material conveyed loosely into the vertical press box is pressed into a finished bale in a few pressing strokes of a retractable press ram, i.e. in layers. Then hinged doors provided on the press box and the jacket surrounding it are opened and the bale is tied and removed from the press box. The suction fan is connected on its pressure side to a bag filter arranged above the press, in which the through the openings of the Press box extracted fiber parts are separated from the air escaping through the filter hose.

The disadvantages of such a device are that the press box doubles as a fiber collection box for receiving the loose and not pre-compressed conveyed from the collecting shaft Fiber material is used, which means a correspondingly long press box and thus a long stroke for the press piston requires, so that there is a very large overall height in a vertical arrangement. Another disadvantage is that with perforated sheet metal provided press box a filter must be connected downstream to the means of the suction fan through the Openings sucked fiber parts not to lose or not to blow into the atmosphere.

According to the invention, these disadvantages are eliminated in a device of the type mentioned in that the fiber collecting shaft is arranged substantially perpendicular to the press and at the exit of the fiber collecting shaft to the press a Shaft opposite the press, which is under atmospheric pressure essentially airtight, controllable slide is provided and that means for determining the fiber

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level in the shaft and means to increase the ruling ", Air pressure in the Fasersaiamelschacht are available, and that a control for actuating the slide and the means for increasing the air pressure when a certain Fais'erneveaus is reached is provided. The procedure for compressing and pressing of fiber material to form a fiber bale is characterized according to the invention in that the fiber material in the fiber collecting shaft up to an adjustable one Degree is precompacted with a pressure gradient in relation to the environment and that the lowering of the precompacted fiber material is supported in a known baler by a pressure gradient generated between the shaft and the press and that the lowering of the fiber material is controlled as a function of a selectable fill level of the fiber material in the shaft will. The controller can also influence this of the element feeding the fiber shaft. ■.

Further advantages of the invention are that the fiber collecting shaft at the same time serves as an air filter that by the vertical arrangement of the fiber collecting tray or by the horizontal arrangement the press an inexpensive one that fits in normal room heights Overall height of the device is obtained, that by generating an increased air pressure, the pre-compressed fiber material quickly and practically completely emptied from the fiber collection shaft or can be pushed * that by pushing out the pre-compressed fiber material the inner wall of the filter hose in the area of the filling level is cleaned at the same time that by the untensioned attachment and the use of a filter hose as the inner jacket of this through the inflowing Transport air is moved and cleaned and that by the provision of a bale binding room the performance of the press is increased to the extent that the press can immediately eject the finished pressed bale and thereby immediately return to it Recording of fiber material is ready. "-

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The invention is illustrated in the following, for example, with reference to FIG Drawing described; in this shows:

1 shows a schematic longitudinal section of the press with a fiber collection shaft, where the control is indicated in the form of a block diagram,

FIG. 2 shows a section of the fiber collecting shaft along line I in FIG. 1 and FIG

3 and 4 are longitudinal sections of the fiber press in different positions.

According to Fig. 1, a vertical fiber collection chute 1 is a horizontal one Fiber baler 2 assigned. The fiber collection shaft 1 comprises a substantially cylindrical inner jacket made of a filter tube 3> which between an inlet part 4 · mifcbels an externally applied clamp 5 and an outlet part 6 is clamped unclamped by means of a clamp 7. The inlet part 4- has an inlet 8 and is with an outer jacket 9 or with its upper end face 10 firmly connected. The outlet part 6 is on the one hand with the outer jacket 9 firmly connected by means of an annular web 11 and closes flush with a press inlet 12 of the bottom Fiber press 2 on. The outer jacket 9 is provided with an air outlet 13 and a rotatable closing flap 14 located therein. The closing flap 14 is actuated by means of a controllable compressed air cylinder 15. The compressed air cylinder 15 is pivotably connected to the outer jacket 9 by means of a web 16.

In a resulting between the outer jacket 9 and the filter tube 3 annular space 17 is on the one An ultrasonic transmitter 18 is arranged on the side of the filter tube 3 and an ultrasonic receiver 19 is arranged opposite it. Both

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Elements together serve to form an ultrasonic elirank 20. The transmitter 18 as well as the receiver 19 are each arranged vertically displaceably on this by means of a web 21 attached to the outer jacket 9, which is indicated by the directional arrows 22 (Fig. 1) is indicated. The transmitter 18 and the receiver 19 are each connected to a control unit 23. With a regulation 24- the switching point of the receiver 19 can be set. An adjustable differential pressure manostat 25 is on the one hand by means of a pressure pipe 26 and a filter 27 with an interior space formed by the inner jacket 28 and on the other hand by means of a pressure pipe 29 and one Filters 30 connected to the space 17. Besides, the Planostat 25 is connected to the control unit 23. One through a cylinder 31 actuated slide 32 closes the interior 28 at its lower end. Another, cylinder 33 actuates a pressing, stamp 35 *

A capacitive full level probe 36 is flush with the pressing chamber 34 and is also connected to the control unit 23. A cylinder 37 actuates the exit of the press chamber 34 · final press gate 38. The cylinders 15 »31» 33 and 37 are each connected to the control unit 23 by means of associated solenoid valves 15a, 31a, 33a »and 37a.

In addition, a bale binding space 39 is added to the fiber press 2. This consists of arms 40 (Fig. 3 »4), which are mounted laterally pivotable by means of bolts 4-1 anchored in the press 2 and on which further arms 4-2 pivotable in Ballenausfahrrichtung A are provided (Fig. 4-) and of arms 4-3, which are opposite the arms 40 and are also pivotably mounted laterally by bolts 44 (FIG. 4). Locking claws 45 are arranged on the arms 42 and locking claws 46 are arranged on the arms 43 and each lock the three arms 40, 42 and 4-3 together to form a frame. These frames are able to ' _t

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to absorb the pressures created by the extension of a pressed fiber ball 47 in directions A and B. The poor 40 and 43 are each provided with a cylinder 48, its extended piston 49 with the bale 47 pushed into the space 39, immediately following the punch 35 » in the edge part of the bale that is turned to this end. The cylinders 48 are each connected to the control unit 23 by means of associated solenoid valves 48a. Likewise is the fan that generates the fiber transport air flow 50 connected to the control unit 23.

The device described works as follows:

In the starting position (FIG. 1), the flap 14 is open, the slide 32 is closed and the press ram 35 is in its Starting position, the gate 3? closed, the bale wrapping room 39 locked and the pistons 49 in their starting position (FIG. 4). After switching on the controller 23 by a Switch 51 promotes the fan that is switched on as a result 50 a mixture of air and fibers, which on the suction side Funnel 52 are fed into the fiber collection space 28. The pressure gradient created by the flow resistance of the filter hose and the accumulated material the fiber material located therein is pre-compressed. Achieved If the fiber material has the height C of the ultrasonic barrier 20, the control unit 23 receives a from the ultrasonic receiver 19 Signal. The control unit 23 then causes the opening by actuation of the cylinder 31 by means of the solenoid valve 31a of the slide 32 and by actuating the cylinder 15 by means of the solenoid valve 15a the closure of the flap Press room 34. The generated by the fan 50 and by the closure of the flap 14 caused increased pressure gradients Compared to the press chamber 34, this emptying of the fiber material supports in the sense of an acceleration. The one with it

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Air flowing into the press chamber 34 with the fiber material escapes through small openings 55 provided in the fiber press (Fig. Ό into the atmosphere.

After a time given by an adjustable time relay of the control unit 23, the flap 14 is opened again and the slide 32 is closed again. The opening of the slide 32 and the closing of the flap 14 can take place simultaneously or staggered in time. The one specified for emptying Time is short enough for the fibers to settle in the transport between. To prevent fan 50 and fiber collection chute 1, which could lead to jams. Subsequently, the press ram 35 is compressed by means of the from Control unit 23 actuated cylinder 33 via solenoid valve 33a to form a partial layer. Several such Partial layers form a ball 47 ·;

When the bale size has been reached, the control unit 23 the full level probe 36 reported. Then the gate 38 is opened by means of the cylinder 37 and the press ram 35 pushes the bale in the bale binding space 39 (Fig. 3) · The path of the press ram is limited by a lock (not shown). The press ram remains in this end position until the bale is fixed in space 39 by the advance of the piston 49 »An, then the ram 35 is pulled back into the starting position and the gate 38 is closed. The control unit 23 actuated. after receiving the signal of the level of exhaustion. 36 at the same time an acoustic signal generator 53 for emitting an intermittent Signals. In this way, the personnel is made aware of the finished and pushed out bale 47. The bale should then be tied off by the staff.

With the exertion of pressure on a switch 54 by the staff , a sensor triggered by the full level probe 36 is activated for. \ Prevention of a further bale ejection serving electrical

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The lock in the control unit 23 is canceled again. If the lock is not released, the slide 32 also remains closed when the fiber height G is reached. The further filled fiber material rises in the filter hose 3 "up to a height in which the air-permeable filter surface is so small that the resistance and thus the air pressure in space 28 one exceeds the value set in the differential pressure manostat 25. As a result, the control unit 23 converts the intermittent end on the one hand acoustic signal in a continuous order, on the other hand an adjustable time relay (not shown) is in function set which, after its preselected time has elapsed, switches off the fan 50 and thus the feed of fiber material into the fiber collection shaft is out of order. That way is overfilling of the fiber collecting shaft is not possible.

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Claims (12)

P a te η, t a η s ρ r ü c h e Brridfcung for pre-compacting and pressing fiber material to a bale, which is a known baler and a fiber collecting shaft arranged above it with a air-permeable, but fiber-retaining inner jacket for receiving and venting a fiber material conveyed by means of transport air and with an inner jacket in the essential surrounding outer jacket with an air outlet opening has, thereby marked-η e t that the fiber collection chute is arranged essentially perpendicular to the press and at the exit of the fiber collection chute to the press in the shaft compared to the press which is under atmospheric pressure essentially Airtight, controllable slide provided is and that means for determining the fiber level in the Chute and means for increasing the prevailing air pressure in the fiber collecting chute are present and that a control for actuating the slide and the means for increasing the air pressure when a certain fiber level is reached is provided. - 2. Apparatus according to claim 1, characterized in that means for determining a Air pressure difference between the outer shell space and the inner shell space and are provided for emitting a signal when a preselected pressure difference is exceeded. 3- Device according to claim 1 or 2, characterized in that g e k e η η ζ e i c h η e t that the control is also used for evaluation of the signal is provided. · ' 4098227-07-3-1 235-148 " 4. Device according to one of the preceding claims, - As a result, g e k θ η η ζ θ i c h η e t that the controller is also provided for influencing the element feeding the fiber collecting shaft. 5 · Device according to claim 2, characterized in that the means are adjustable Include differential pressure manostat. 6. Device according to one of the preceding claims, characterized in that the inner jacket essentially-made up of one at its two ends attached filter hose. 7 · Device according to claim 6, characterized in that the filter hose is so untensioned is attached that it is moved by the inflowing transport air and cleaned thereby. 8. Device according to one of the preceding claims, characterized in that the baler is connected to a bale binding room for the purpose of receiving the bale that has been fully pressed by the press. 9. Apparatus according to claim 8, - characterized in that the ball binding space by movable and lockable arms is formed. - 10. The device according to claim 9, characterized in that g e k e η η ζ e i. c h.n e t, that the arms are provided with means for fixing the bale pushed into the bale binding space are. 409822/0734 11. The device according to claim 10, characterized in that g e k e η η - ζ eich η et ₉ that the middle are cylinders each with a piston that can be pushed into the bale binding space and that the cylinders are actuated by solenoid valves *. 12. Vomchtung according to one of the preceding claims, characterized g ekennz β i suspects that the controller also applied to the solenoid valves. 13 · Process for pre-compacting and pressing fiber material into a fiber bale, characterized in that the fiber material · in the fiber collection shaft is pre-compressed to an adjustable degree with a pressure gradient relative to the environment and that the Lowering the pre-compressed fiber material into a known baling press through an intermediate shaft and press generated pressure gradient is supported, as well as "that the lowering of the fiber material in dependence. * is controlled by a selectable fill level of the fiber material in the shaft. ■ - - - 409822/0734