DE2460301A1 - FEEDING AND DOSING SYSTEM FOR WOOD SANDING, REJECT AND THE LIKE - Google Patents

Description

Enrichment production for

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Patent attorneys
Dlpl.-ing. R. BEETZ sen
Dipl-Ing. K. LAMPRECHT

Or.-Ing. R. BEETZ Jr. 2 4 6 O 3 Q

* Munich 22, Steln.dorf.tr. U ^V

. 12. 197-4

OY SUOMEN VANUTEHDAS - PINNWAD LTD., Helsinki (Pinnland)

Feed and dosing system for wood pulp, rejects and the like.

The present invention relates to a feeding and dosing system for Wood pulp, rejects and the like.

The system according to the invention is primarily used for production of hygiene articles such as sanitary napkins, baby diapers and medical wraps but also for use in cases where in Harrmermühlen, disk mills or similar mills of frayed, dry material is used. Of the The purpose of the system according to the invention is therefore to consist of dry sheet metal, flake-dried dry wood pulp and To tear off scrap flakes in advance, to dose, convey, mix them and to achieve an even feed through 1 to 4 different ones Dosing devices on 1 to 4 Harrmer mills, disk mills or the like. to to distribute. Articles of uniform quality, such as the above-mentioned hygiene articles, can be produced from these flakes. So far, the problem in question has been solved by

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a) Conveying bleached pulp in roll form as a continuous Strip through feed rollers into the mill in question,

b) Chopping the balls into strips and using a plan cutter further shredding and dosing of the strips with the help of hammer mills, screw conveyors, etc.

c) Tearing a whole bale in chopping machines as well as shredding and Dosing of the bale by means of Harmner mills, screw conveyors, etc.

d) conveying the sheets into a hammer mill, etc.

The main disadvantage of the method mentioned in point a) is in that the roll material is extremely expensive and that the supply is scarce.

The disadvantage of the method mentioned in point b) is the high price of the arrangement, so this method is primarily only suitable for large production plants.

The procedure mentioned in point c) has the same disadvantage, among other things afflicted like the procedure mentioned in point b). In addition, the well-known bale tears often leave a sharp cut-off edge that is difficult to remove can be frayed by grinding in a Harmnermühle. The quality of the shot can also be fluctuate when the end part of the bale falls into the ripper and the rust load changes momentarily.

The method mentioned in point d) has the disadvantage that the hammer mill shakes the bows too much and that flakes dry Grist cannot be fed into the mill as such. A mill suitable for this purpose would also have a greater power requirement and higher Manufacturing costs associated.

The present invention has for its object the above To eliminate disadvantages, and the system according to the invention is mainly characterized by

- a sheet tearing unit,

- a wood chip breaker unit;

- One distribution unit, which is made up of the aforementioned two tear units coming, ground and mixed raw material through at least a cyclone is fed through and which at its lower

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Has the end of a mixer together with metering devices,. - one or more feed units contained in a mill arrangement, which the raw material is fed through a cyclone and which have a vertical tube, on the wall of which a Hinged flap is arranged, which under the action of a flywheel and an associated camshaft on after outwardly directed blows reacts, and at its lower end two wheel gears rotating in opposite directions are provided are, which have spiral wings, as well as a small-sized mixing roller arranged at the lower part of the gearbox. Special embodiments of the system according to the invention are characterized by the constructions according to patent claims 2 to 5.

The invention is illustrated below with reference to some exemplary embodiments explained in more detail in the accompanying drawings. Show it:

FIG. 1, partly schematically, the system according to the invention in plan view.

FIG. 2 shows a part of the system according to FIG. 1 in a parallel perspective. FIG. 3 shows a pusher contained in the system according to FIG. 1 in a parallel perspective.

FIG. 4 shows a parallel perspective of one contained in the feeder according to FIG Wheel gear.

FIG. 5 shows, on an enlarged scale, a detail of the system according to FIG FIG. B shows a mixing roller contained in the feeder according to FIG. It should be mentioned by way of example that the sheet breaker 1 of Finnish patent application No. 3957/73 dry sheet material using a known sheet feed device 2 is promoted.

In the Finnish patent application no. 3956/73 again is indicated by the there described flake-dried wood pulp 3 dry wood pulp from a conveyor 4 and waste cells by a conveyor 5 such as also promoted through a cutter mill B known per se. The above three raw materials are all synchronized electrically by the Feed devices in accordance with the selected raw material mixture promoted.

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The pre-ground and mixed raw materials are made with the help of Fans conveyed through cyclones 7, 8 to a distributor 9, in which the amount of raw material is regulated by means of ultrasonic devices 10, which give an impulse to the feed motors 11 and 12 of the feed devices synchronize.

Agitating arms 14 of the rotating mixer at the bottom of the distributor 9 and through the cylindrical mixer 9 extending fixed tongs 15 mix and distribute the raw material mixture 1 to 4 and throw it into a short sized one Shaft 16, at the lower end of which is a double vane gear 17 (N = 3000 r / min) is arranged, which is driven by a separate motor 18.

The metering devices, which have a double impeller, meter flakes to a centrifugal fan 19, the Pre-shot feeds through a cyclone 20 to the actual feeder 21 of the mill assembly. Every centrifugal fan gets some water supplied, with the resulting water vapor discharging static Electricity conveyed from the dry pulp. Each centrifugal fan also has a solenoid valve adapted to the feed Bb on.

The pusher 21 consists of a right-angled tube 22, in which the material level, e.g. by means of a photocell 23 or the like. controlled will. The impulse given by the photocell 23 controls the drive motor 18 of the said double vane metering device. Around the middle of the As viewed in the vertical direction of the feed motor, a hinge 24 is provided on one wall, which wall acts as a perspective flap 25 down to the bottom is trained. This flap give the wheels 29 of a camshaft 26, the flywheel 28 of which is driven by a separate motor 27, blows directed outwards, which set a pair of springs 30 back. The stroke rate can e.g. be 200 rpm. At the lower end of the tube there are wheel gears 31 and 32, the double spirals produced in zigzag form with more uniform Own slope. A spiral made of flat iron can also be used. The wheel gears 31 and 32 are driven by a separate toothed gear rack motor 33 and convey the shot through between them a small mixing roller 34, with four made of e.g. Balataband

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Wings 37 is provided. From here the shot falls due to the air flow into a shaft 35 which (the) for the hammer mill in question or the like. leads.

When the processing device "orders" meal, the run
Toothed gear motor 33 of the feed rollers and the drive motor 27 of the camshaft.

The shot consumption starts with the photocell 23 for controlling of the level issued an impulse to the motor 18, which puts the metering device 17 divided into compartments into operation.

The level drops in the shot distributor 9. By the from the ultrasonic device 1D the feed motor 12 of the sheet feeder, the feed motor 11 of the wood grinding ripper and the motor 36 (e.g. a conveyor belt) of the feed pusher 6 contained in the waste mill 6 is driven.

When the level in the distributor 9 and in the feeders increases, the corresponding feed motors stop. In contrast, the fans and motors of the main machines are controlled and rotate from elsewhere
continually.

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Claims (5)

Patent claims: Feed and dosing system for wood pulp, rejects, etc., marked by - a sheet tearing unit (1, 2), - a wood pullout unit (3 to B), - A distribution unit (7 to 9, 13, 18, 19), which consists of the mentioned two rice units (1, 2 and 3 to 6) conrmender, ground and mixed raw material is fed through at least one cyclone (7 or 8) and which at its lower End has a mixing machine (13, 14) together with dose devices, - One or more feed units contained in a mill arrangement (20 to 32) to which the raw material is passed through a cyclone (20) is fed through and which have a vertical tube (22), on the wall of which a flap (25) provided with a hinge (24) is arranged which reacts to outward impacts under the action of a flywheel (28) and a corresponding camshaft, and at its lower end two oppositely rotating wheel gears (31, 32) are provided, the spiral blades have (Fig. 4) and a small-sized mixing roller arranged on the lower part of the gearbox. 2. Plant according to claim 1, characterized in that the distribution unit (7 to 9, 13, 18, 19) has an ultrasonic device for controlling the amount of raw material. 3. Plant according to claim 1 or 2, characterized in that the Dosing devices consist of a double vane gear (17). 4. Plant according to one of the preceding claims, characterized in that that a photocell (23) or the like to control the substance level. is arranged at the upper end of the vertical tube (22). 5. Plant according to one of the preceding claims, characterized in that that the flap (24) is provided with springs (30) to set back the blows. 5 09827/0666