WO2013102618A1

WO2013102618A1 - Suction-type rod conveyor of a machine in the tobacco-processing industry

Info

Publication number: WO2013102618A1
Application number: PCT/EP2013/000002
Authority: WO
Inventors: Andreas KAPITZE; Derk Van Hove
Original assignee: Hauni Maschinenbau Ag
Priority date: 2012-01-06
Filing date: 2013-01-02
Publication date: 2013-07-11
Also published as: DE102012200163B4; DE102012200163A1

Abstract

The invention relates, inter alia, to a suction-type rod conveyor (1) of a machine in the tobacco-processing industry, in particular of a rod-forming machine, having a suction belt (2), which can be subjected to negative pressure, and having at least one deflecting roller (3a, 3b) for the suction belt (2). The suction-type rod conveyor (1) is distinguished in that at least one deflecting roller (3a, 3b) and/or one guide roller (4) for the suction belt (2) are/is designed, in the circumferential direction in each case, with accommodating pockets (50) for accommodating crosspieces (42) of the suction belt (2).

Description

Saugstrangförderereinrichtung a machine of the tobacco processing industry

description

The invention relates to a Saugstrangfördereinrichtung a machine of the tobacco processing industry, in particular extrusion machine, with a vacuum applied to the suction belt and at least one deflection roller for the suction belt. Furthermore, the invention relates to a machine of the tobacco processing industry, in particular stranding machine.

From DE 36 27 057 A1, for example, a method and an apparatus for producing a tobacco rod are known. The apparatus for producing a tobacco rod for the production of a cigarette rod forms a continuous conveyor comprising a continuous, endless suction belt, which passes through a strand construction zone, wherein the strand conveyor in the strand construction zone can be loaded with fibers for strand formation. In addition, the strand conveyor has a discharge end for discharging the fiber strand.

CONFIRMATION COPY The strand conveyor is assigned an excess removal device.

The suction belt of Saugstrangförderers used is guided in a tobacco channel and associated with the back of a vacuum chamber which is connected to a vacuum source and causes a suction through an air-permeable channel bottom and through the air-permeable suction belt.

In the Aufschauerbereich or in the strand building zone tobacco fibers are aufgeschauert on the suction belt from below and held by the induced draft on the suction belt. For detaching the tobacco rod from the suction belt downstream of the discharge end of the suction belt or the tobacco channel is a customer, e.g. a scraper, provided with an inlet finger, which ensures that the preformed tobacco rod is introduced into the adjoining format.

To produce a tobacco rod in a cigarette extruder, tobacco fibers spread out in a distributor are thrown from below onto the circulating suction belt of the suction belt conveyor, which is subjected to negative pressure. The suction belt is permeable to air and is supplied with suction air. The passing through the suction belt to the vacuum chamber air flow leads the tobacco fibers from a tobacco shower to the suction belt and keeps them hanging on the suction belt until they are stored as fiber strand at the format inlet of the machine on a wrapping material strips (cigarette paper strip).

In addition, a conveyor belt for conveying a tobacco rod is described in DE 35 38 928 A1. Furthermore, DE 1 932 616 A describes a woven porous band for cigarette machines. Based on this prior art, the object of the invention is to improve the guidance of a suction belt of a Saugstrangfördereinrichtung a machine of the tobacco processing industry, in particular the suction belt is formed with elevations or transverse webs.

The object is achieved by a Saugstrangfördereinrichtung a machine of the tobacco processing industry, in particular extruding machine, with a vacuum acted upon suction belt and at least one pulley for the suction belt, which is further developed by at least one guide roller and / or a guide roller for the suction belt respectively formed in the circumferential direction with receiving pockets for receiving transverse webs of the suction belt.

The invention is based on the idea that when using a suction belt, the longitudinal threads in the conveying direction juxtaposed longitudinal and transverse to the conveying direction of the suction belt formed separate and / or block-shaped transverse webs, the elevations of the transverse webs of the suction belt in the receiving pockets of the gear-like pulley and / or be received in the receiving pockets of the gear-like guide roller, so that under positive engagement between the recorded in the receiving pockets surveys of the transverse webs and the receiving pockets of the guide roller or guide an exact guidance and a precise drive of the rotating suction belt is achieved.

In particular, a suction belt is used for the strand conveyor according to the invention, which in the German application of HAUNI Maschinenbau AG, Hamburg, with the application number 10 2012 200 158.1, filing date 06.01.2012, is described. The content of this patent application is fully incorporated in the present patent application expressly.

Characterized in that the elevations of the transverse webs of the suction belt in the receiving pockets of the guide roller or the guide roller engage under rotation of the guide roller and conveying the suction belt and form fit, when using a drive for the guide roller a positive drive is achieved, since the receiving pockets of the guide roller form complementary formed to the arranged on the inside or drive side of the suction belt and the receiving pockets of the deflection roller facing elevations. As a result, an exact guidance and deflection of the suction web formed with transverse webs is achieved.

For this purpose, it is provided in a development of the Saugstrangfördereinrichtung that the deflection roller is designed as a drive roller for the suction belt, wherein a drive motor is provided for the drive roller. In this case, the drive motor is connected to the drive roller, wherein in particular the drive roller is arranged at the upstream end of a suction channel, into which the suction belt is or will be guided.

Furthermore, a development of the invention is characterized in that the receiving pockets of the deflection roller and / or the receiving pockets of the guide roller are formed at regular intervals in the circumferential direction of the deflection roller or the guide roller. This results in particular a gear-like deflection roller or drive roller or a gear-like guide roller for the trained with transverse webs suction belt.

In particular, the width of the deflection roller or the guide roller smaller than the width of the suction belt, wherein the stiffness of the suction belt is transverse to the conveying direction or longitudinal direction of the suction belt higher than the stiffness in the longitudinal direction, since the suction belt is stiffened over the entire width by the formed as stiffening ribs cross webs.

For this purpose, in one embodiment of the Saugstrangfördereinrichtung provided in particular that the receiving pockets of the guide roller and / or the receiving pockets of the guide roller are complementary in shape complementary to the cam-like crosswise elevations of the transverse webs of the suction belt, wherein the transverse stabs on the receiving pockets facing the pulley and / or on the the receiving pockets of the guide roller form complementary side facing the suction belt are arranged. Here, with rotation of the guide roller and / or (co-rotating) guide roller, the cross-beam surveys are introduced into engagement with the receiving pockets formed on the outside in the circumferential direction of the guide roller and the guide roller, wherein in the drive of the guide roller formed between the receiving pockets teeth engage behind the cross-surveying and thus the suction belt is or will be subjected to a tensile force.

Furthermore, the object is achieved by a strand conveyor of a machine of the tobacco-processing industry, in particular extruding machine, with a vacuum acted upon suction belt and at least one pulley for the suction belt, further comprising a Saugbandförderkanal is provided for a suction belt, which is further developed by the Saugbandförderkanal has arranged on the upper side side Saugbandanlageflächen for trained with, preferably block-like, formed transverse webs suction belt, the Saugbandanlageflächen in conveying Direction of the suction belt in Saugbandförderkanal extend on both sides and wherein the lateral Saugbandanlageflächen in contact with the provided on the inside of the suction belt transverse webs, in particular at the edge of the transverse webs, can be brought and wherein the suction belt in the central region between the lateral Saugbandanlageflächen the Saugbandförderkanals stützmit- telfrei funded is.

Here, the invention provides that the suction belt is conveyed in a Saugbandförderkanal, above the suction belt on the right and left side of the suction belt in the conveying direction above the belt a Saugbandauflage is provided with lateral Saugbandanlageflächen and the suction belt without central Saugbandauflage between the Saugbandanlageflächen the Saugbandförderkanals conveyed is or is promoted. Since the suction belt due to the dimensionally stable transverse webs has a high transverse stiffness compared to the stiffness in the longitudinal direction, it is possible to guide in the Saugbandförderkanal the suction belt through two top and side Saugbandanlageflächen along the Saugbandförderkanals without the center of the suction belt at a Support or guide device for the central region between the lateral edge regions of the suction belt, ie without support.

Here, the inside of the suction belt, which is also referred to as the back, facing a vacuum source or the vacuum chamber of a vacuum source and provided for the suction belt pulleys, wherein the inside of the suction belt of the suction side of the vacuum chamber or the vacuum source faces. The inner side of the suction belt, which is designed as a rear side, can be acted upon or acted upon by negative pressure in the region of the vacuum chamber or the vacuum source for the suction belt, wherein on the outside (or front side) of the suction belt, in particular in the Aufschauerbereich or in the strand building zone or in the region of the vacuum chamber for the suction belt, tobacco fibers are aufzuschauerbar on the suction belt from the bottom or from the outside or are aufschauerbar. In this case, the lateral Saugbandanlageflächen the Saugbandförderkanals for the suction belt in contact with the outer, lateral regions of the suction belt can be brought, in particular a lateral Saugbandanlagefläche is provided for each outer region of the suction belt in the longitudinal direction of the suction belt or in the conveying direction, so that the suction belt with his middle area between the lateral outer areas without support along the Saugbandförderkanal is conveyed.

In addition, a development of the suction belt conveyor is characterized in that the Saugbandförderkanal is narrowed above the Saugbandanlageflächen arranged laterally from the suction belt, wherein the width of the narrowed Saugbandförderkanals is smaller than the width of the suction belt, in particular the width of the transverse webs of the suction belt.

Furthermore, the object is achieved by a machine of the tobacco-processing industry, in particular a stranding machine, wherein the machine with a Saugstrangfördereinrichtung, as described above, is formed. The Saugstrangfördereinrichtung has in particular a trained with transverse webs suction belt. To avoid repetition, reference is expressly made to the above statements.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Erfindungsge- According to embodiments, individual features or a combination of several features may be met.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

Fig. 1 is a schematic partial sectional view of a

Saugstrangförderers a machine of the tobacco processing industry in a side view;

2 schematically shows a perspective view of a suction belt for a suction belt conveyor in a perspective view;

3 schematically shows a view of a deflection roller with a

Suction tape in the neckline and

Fig. 4 shows schematically a cross section through a tobacco channel designed as a strand conveying channel in the neck.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

Fig. 1 shows a schematic partial sectional view of a Saugstrangförderers invention 1. The Saugstrangförderer 1 is shown in a side view. The Saugstrangförderer 1 is part of a cigarette rod or filter rod machine of Tobacco processing industry.

As a conveying element, an air-permeable suction belt 2 is provided, e.g. a perforated belt or air-permeable fabric belt that circulates around front and rear pulleys 3a and 3b, respectively, and around guide rollers 4. The lower strand 2a of the suction belt 2 is guided in a fiber channel 6 partially with air-permeable bottom according to the desired contour of the finished strand. The fiber channel 6 runs in a straight line in a guide body.

Within the scope of the invention, a suction belt 2 is also understood to mean a strand conveyor belt or conveyor belt.

The guided in the fiber channel 6 suction belt 2 is assigned to the rear side or inside a negative pressure chamber 9, which is connected to a vacuum source 1 1 and causes a suction through the air-permeable channel bottom and through the air-permeable suction belt 2. The suction belt 2 runs in the direction of the arrow 12.

The mouth of a conveyor shaft 13 for conveying fibers or a mixture of fibers and other constituents of a tobacco or filter strand through which loose or scattered fibers are fed from a distributor, not shown, in the direction of the arrows 14 to the suction belt 2 defines a strand construction zone Z, in which the fiber strand 16 is aufauert to its full height. The production well 13 may be the end of a fluid bed conveyor or a suction well.

The vacuum chamber 9 extends over almost the entire length of the fiber channel 6 and is transverse to the conveying direction of the suction Bands 2 associated with at least a portion of the suction belt 2, wherein transversely to the conveying direction of the suction belt 2, the negative pressure chamber 9 is not quite as far as the suction belt 2 is wide.

However, it can also be provided that the suction channel or the vacuum chamber 9 in the width or transverse to the conveying direction of the suction belt 2 covers the complete suction belt. So that the suction belt 2 is not sucked into the vacuum chamber 9, the air-permeable bottom of the guide body is provided with Saugluftschlitzen or -Öffnungen. The floor is perforated, for example. It may also be provided according to DE 36 27 057 A1, to provide a plurality of vacuum chambers, for example, apply side strip of the suction belt separated from the central strip with suction, wherein the negative pressure can be controlled according to specifiable.

Downstream of the strand building zone Z, an excess removal device 19 is arranged which removes excess tobacco 16a from the tobacco rod 16. The excess removal device 19 is also referred to as a trimmer and comprises, for example, one or two circular blades 28, which are designed to rotate and whose cutting circuits are in contact with the excess removal in the strand region. Preferably, the circular blades 28 are formed or arranged so that they give the fiber strand in the excess decrease at least a portion of the desired strand contour of the finished strand at least approximately corresponding cross-sectional contour. Corresponding embodiments are shown for example in DE 36 27 057 A1.

The discharge end 21 of the suction belt 2 or of the fiber channel 6 lies above the paper inlet of a format device 22, in which the fiber strand is provided with a wrapping material fed in the direction of the arrow 23 a. alstreifen 23, for example, a cigarette paper strip or a filter paper strip, is wrapped. An encircling format strip 24 conveys the wrapping material strip 23 and the fiber strand 16 deposited thereon under an inlet finger 26 into the format device 22, wherein the strand contour preformed by the bottom of the fiber channel facilitates the strand inlet into the format device and the covering because lower deformation forces have to be applied ,

The fiber strand 16 is advantageously deposited after the excess removal in the inlet region of the format device on an already formed to a trough wrapping material strips, so that the cross-sectional contour, which he received in the excess decrease, is largely retained and facilitates the entry into the format device by reducing the applied deformation work.

The vacuum chamber 9 ends above the inlet region of the format device 22. However, this may extend as far as the deflection roller 3a or up to the upstream edge of the inlet finger 26 in the conveying direction, that is, as far as the detachment region 20. The deflection roller 3a can also be designed as a press roll.

In addition, in Fig. 1, a compression means 33 is shown, for example, from a rotating control disk, not shown, which is rotatably mounted in a cylindrical receptacle, not shown, in the housing 34, and serves to provide compressed portions in the strand. Further explanations of the compression device 33 can also be found in DE 36 27 057 A1.

In Fig. 2 is a suction belt 2 for a Saugstrangförderer 1 (see. Fig. 1) fragmentary in a perspective view respectively. The suction belt 2 has an air-permeable structure which is formed of longitudinal threads 40 arranged next to one another and transverse webs 42 (see FIG. 2) formed perpendicular to the longitudinal threads 40. Here, the transverse webs 42 are arranged in the conveying direction 12 of the suction belt or in the longitudinal direction of the suction belt 2 parallel to each other and at equidistant intervals.

The longitudinal threads 40 of the suction belt 2 extend in the longitudinal direction of the suction belt 2, wherein the transverse webs 42 are arranged in the transverse direction as a segment-like blocks or as a cross cam on the longitudinal threads 40 and with the longitudinal threads 40 at least one or more or all crossing points or connecting areas with each other are connected. Here, the block-like or cam-like transverse webs 42 are operatively connected to the monolayer arranged longitudinal threads 40, in particular non-positively.

In addition, reference is made to the details of the suction belt in the German patent application of HAUNI Maschinenbau AG, Hamburg, with the application number 10 2012 200 158.1, (filing date: 06.01.2012), in which the suction belt is described in detail. The disclosure of this application is expressly incorporated in the present patent application.

3 shows schematically a view of a deflecting roller 3a (see FIG. Here, the deflection roller 3a is arranged between the vacuum chamber 9 (see Fig. 1) and the inlet finger 26 (see Fig. 1). By means of the suction belt 2, according to the arrow 12, a tobacco tobacco strand or filter strand is conveyed on the flat bottom side or outside of the suction belt 2, wherein for the sake of clarity, the representation of a tobacco rod or filter strand, as in FIG. was disregarded.

The suction belt 2 has at its the pulley 3a and the negative pressure chamber 9 facing inside due to the cam-like transverse webs 42 via elevations which are formed transversely to the conveying direction (arrow 12) and to the longitudinal direction of the suction belt 2. Also on the outside of the suction belt 2, is thrown on the filter material or tobacco material, cam-like elevations 42 are formed due to the transverse webs. By formed as a kind of stiffening ribs crossbars 42 is a transverse reinforcement of the suction belt 2, in particular perpendicular to the conveying direction, i. perpendicular to the plane in Fig. 3, formed.

The drive means rotatably driven by a (not shown here) pulley 3a has on its outer side in the circumferential direction via receiving pockets 50, in which the cam-like elevations of the transverse webs 42 are received on rotation of the deflection roller 3a. In this way, a, in particular positive, receiving the receiving pockets 50 facing cam-like elevations of the transverse webs 42 on the inside of the suction belt 2 is achieved.

The receiving pockets 50 of the deflection roller 3a are regularly arranged in the circumferential direction and preferably have the same geometric dimensions. Between each receiving pockets 50 in the circumferential direction, a tooth-like projection 52 is formed, so that the deflection roller 3a is formed in particular as a formed with a tooth-like sheath profile disc. The fact that when introducing the inside cam-like elevations of the transverse webs 42 of the suction belt 2 into the receiving pockets 50 of the deflection roller the tooth-like projections 52, the trailing edge of the cam-like elevations of the transverse webs 42 behind. grab, a tensile force is exerted on the suction belt 2 during rotation of the deflection roller 3a, so that the suction belt 2 is conveyed according to the conveying direction 12.

In the context of the invention, the guide rollers shown in Fig. 1 (reference numeral 4) also receiving pockets on the outer peripheral surface to accommodate the inside transverse stabs of the suction belt, wherein the embodiments made for the guide roller 3a shown in Fig. 3a also for the guide rollers 4 apply in a corresponding manner.

In Fig. 4 is a cross-section through the trained as a strand conveying channel tobacco channel 6 (without aufgescherten strand of material) in cross-section fragmentary. Here, the suction belt 2 is perpendicular according to the drawn in Fig. 4 conveying direction 12, i. perpendicular to the plane, promoted. As a result of the cross-stiffening transverse webs 42, the suction belt 2 is made stiffer transversely to the conveying direction than in the longitudinal direction or conveying direction 12 of the suction belt 2.

The tobacco channel 6 is formed by two parallel aligned and spaced apart cheeks 61, 62, between which the air-permeable suction belt 2 is conveyed through. The cheeks 61, 62 laterally delimit the tobacco channel 6 or the suction band 2 is conveyed between the two cheeks 61, 62. The cheeks 61, 62 each have protrusions 63, 64 projecting into the tobacco channel 6, on the underside of which suction belt contact surfaces 65, 66 for the lateral edge regions of the suction band 2 are formed. During the conveyance of the suction belt 2 between the spaced-apart cheeks 61, 62, the horizontally formed Saugbandanlageflächen 65, 66 limit movement of the suction belt 2 in a vertical upward direction, so that the suction band 2 is guided in the lateral region of the suction belt 2 during the conveying of the Saugbandaniageflächen 65, 66 formed above the suction belt 2. Here, no guide device for the suction belt 2 is provided in the central region between the channel cheeks or cheeks 61, 62, by a bending in a flexible fabric having a suction belt, which is not stiffened in the transverse direction, would be used. In contrast, the stiffened in the transverse direction of suction belt in the central region between the lateral Saugbandaniageflächen 65, 66 without support between the channel cheeks 61, 62 out.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features.

LIST OF REFERENCE NUMBERS

1 suction belt conveyor

2 suction belt

2a lower strand

3a pulley

3b pulley

4 leadership role

6 fiber channel

9 vacuum chamber

1 1 vacuum source

12 conveying direction

13 production shaft

14 fiber conveying direction

16 fiber strand

16a excess fibers

19 Surplus collection device

20 separation area

21 discharge end

22 format device

23 wrapping material strips

23a arrow direction

24 format tape

26 inlet fingers

28 circular knives

33 compaction device

34 housing

40 longitudinal thread

42 crossbar

50 receiving pockets

52 protrusions

61 cheek

62 cheek 63 advantage

64 lead

65 suction belt contact surface

66 suction belt contact surface

Z strand building zone

Claims

Saugstrangfördereinrichtung a machine of the tobacco processing industry claims

1. Saugstrangfördereinrichtung (1) a machine of the tobacco-processing industry, in particular extruding machine, with a vacuum acted upon suction belt (2) and at least one deflection roller (3a, 3b) for the suction belt (2), characterized in that at least one deflection roller ( 3a, 3b) and / or a guide roller (4) for the suction belt (2) in each case in the circumferential direction with receiving pockets (50) for receiving transverse webs (42) of the suction belt (2) is formed.

2. Saugstrangfördereinrichtung (1) according to claim 1, characterized in that the deflection roller (3a, 3b) is designed as a drive roller for the suction belt (2), wherein a drive motor is provided for the drive roller.

3. Saugstrangfördereinrichtung (1) according to claim 1 or 2, characterized in that the receiving pockets (50) of the deflection roller (3a, 3b) and / or the receiving pockets (50) of the guide roller (4) at regular intervals in the circumferential direction of the deflection roller (3a, 3b) or the guide roller (4) are.

Suction-belt conveyor (1) according to one of claims 1 to 3, characterized in that the receiving pockets (50) of the deflection roller (3a, 3b) and / or the receiving pockets (50) of the guide roller (4) complementary to the shape of the transverse stabs of the transverse webs (42) of the suction belt (2) are formed, wherein the transverse beam elevations are arranged on the inside of the suction belt (2) facing the receiving pockets (50) of the deflection roller (3a, 3b) and / or on the receiving pockets (50) of the guide roller (4).

Suction-belt conveyor (1) according to the preamble of claim 1 or any one of claims 1 to 4, wherein a Saugbandförderkanal (6) for a suction belt (2) is provided, characterized in that the Saugbandförderkanal (6) arranged on the upper side Saugbandanlageflächen (65, 66) for the, preferably block-like, transverse webs (42) formed with suction belt (2), wherein the Saugbandanlageflächen (65, 66) in the conveying direction of the suction belt (2) in Saugbandförderkanal (6) extend on both sides and wherein the lateral Saugbandanlageflächen (65 , 66) in contact with the on the inside of the suction belt (2) provided transverse webs (42) can be brought and wherein the suction belt (2) in the central region between the lateral Saugbandanlageflächen (65, 66) of the Saugbandförderkanals (6) without support is conveyed. Suction-belt conveyor (1) according to claim 5, characterized in that the Saugbandförderkanal (6) above the laterally from the suction belt (2) arranged Saugbandanlageflächen (65, 66) is narrowed, wherein the width of the narrowed Saugbandförderkanals (6) smaller than the width of the suction belt (2), in particular the width of the transverse webs (42) of the suction belt (2), is.

Machine of the tobacco-processing industry, in particular a stranding machine, wherein the machine is designed with a suction-strand conveyor (1) according to one of claims 1 to 6.