EP1330960B1 - Intake finger for a formatting device - Google Patents

Abstract

A garniture tongue of a garniture device of a rod machine arranged for compressing a material, comprises a rod guide surface. It is in part made of a steel alloy with high titanium carbide content. Independent claims are included for: (a) a compression surface of a compression mold, comprising a guide surface arranged to contact a material to be compressed and being in part made of a steel alloy with high titanium carbide content; (b) a compression mold, comprising the compression surface; a compression channel into which the material is compressed by the guide surface; and a removal device structured and arranged to transfer particles into the compression channel; and (c) a process of compressing a material in a garniture device (4) of a rod machine, comprising guiding the material along the rod guide surface of the garniture tongue (7). The material becomes compressed as it is guided along the rod guide surface.

Description

The invention relates to an inlet finger of a format device a stranding machine for compacting a Stranges from one in the tobacco processing industry processed material, in particular tobacco, during its promotion along a strand guide surface of the Intake finger. The invention further relates to a Forming device of a strand machine of tobacco processing Industry.

The inlet finger of the format device is used for compacting of the strand from one in the tobacco processing Industrial processing material, in particular Tobacco or another smokable material. The Compaction happens during the promotion of the Strangs, along the finger while diminishing the Strand cross-section.

To make a cigarette rod are usually isolated and loosened tobacco fibers on an in a tobacco channel circulating strand conveyor to a Fiber strand popped up, the continuously from the Strand building area is conveyed away and leveled, before going on a with a wrap-around format tape in a format device moved wrapping material strips stored and in the format device with the wrapping material strip, e.g. a cigarette paper strip, is wrapped. The in the inlet area of the format device initially just incoming wrapping material strips becomes first when passing through the format device U-shaped around the fiber strand, before turning all around wrapped around the strand and to form a cylindrical Shell along an overlap seam in the Usually closed by gluing around the strand becomes.

A format or format device for a cigarette machine is described, for example, in US-PS 47 32 165. At the strong compression of the strand along the inlet finger, the quality of the Tobacco strain significantly deteriorate. This deterioration the quality of the tobacco rod can be because that due to the friction of the tobacco material with the Guide surfaces associated with the inlet finger, it can come to congestion, which again to density fluctuations can lead. With correspondingly high coefficients of friction Wear the inlet fingers due to a relative high mechanical stress relatively quickly, so that these have a short life.

The object of the present invention is to provide a Improvement of strand quality compared to existing ones To reach inlet fingers, in particular their Life should be increased as possible.

This task is performed by an inlet finger of a Forming device of a stranding machine for compacting a strand of one in the tobacco processing Industrial processed material, in particular Tobacco, while conveying along a strand guide surface the inlet finger solved by that the inlet finger at least partially made of a steel alloy consists of a high titanium carbide content.

By using a steel alloy with a high titanium carbide content become high life of the inlet finger achieved by surprisingly tobacco or Tobacco particles on the steel alloy with high titanium carbide content slide along very well, so a very low coefficient of friction, especially at high Strand speeds of over 100 m / min., Between the inlet finger and the tobacco particles also at different humidity levels exists. Due to the high sliding properties and the low Friction coefficient results in a lower Wear of the inlet finger.

Preferably, at least a part of the strand guiding surface exists from the steel alloy with high titanium carbide content. By this embodiment of the invention it is for example possible, a smaller part of the inlet finger with the steel alloy of high titanium carbide content to be provided so that costs can be saved. For this is preferably a solid piece comprising the Strand guide surface on another part of the inlet finger soldered or composite sintered. alternative For this it is possible to make a relatively thin layer the steel alloy with high titanium carbide content per Laser ablation or by means of thermal evaporation or For example, produce electron beam evaporation.

A particularly abrasion-resistant steel alloy is then achievable if the steel alloy is a powder metallurgical manufactured steel alloy is.

In a preferred embodiment, the titanium carbide content is the steel alloy over 20% by weight. In a more preferred embodiment of the invention is the Titanium carbide content of the steel alloy between 31% by weight and 35% by weight and especially between 32% by weight and 34% Wt%.

C: 0,5 - 0,65 Gew%, Cr: 3,0 - 19,5 Gew%, Mo: 2,0 - 3,0 Gew%, Cu: 1,0 - 1,5 Gew%, Ni: 0 - 0,25 Gew%, Fe: den Rest.

Preferably, the binder phase is martensite or austenite. A martensite binder phase results in very well machined steel alloys, which have high corrosion resistance, depending on their carbon content. As constituents of martensite and their proportions are, for example, the following in question:

C: 0.5 - 0.65 wt%, Cr: 3.0 - 19.5 wt%, Mo: 2.0 - 3.0 wt%, Cu: 1.0 - 1.5 wt%, Ni: 0 - 0.25 wt%, Fe: the rest.

Austenite as a binder phase becomes an excellent Corrosion resistance and excellent wear resistance achieved. The ingredients of austenite are preferably the following:

Cr: about 18% by weight, Ni: about 12% by weight, Mo: about 2% by weight, Cu: about 1% by weight, Nb: about 0.85% by weight, Fe: the rest. As the preferred Steel alloy with high titanium carbide content are suitable in particular the steel alloys with the brand name "FERRO-TITANIT" of Thyssen Stahl AG, Oberschlesienstraße 16, Krefeld. In a structure of titanium carbide and martensite become the preferred alloys FERRO-TITANIT-C-Spezial (33.0% by weight titanium carbide content) and FERRO-TITANIT-S (containing 32% by weight of titanium carbide designated. A preferred alloy with a Titanium carbide and austenite microstructures are made by Thyssen Stahl AG with "FERRO-TITANIT-U" and includes a proportion of 34% by weight titanium carbide.

Preferably, the steel alloy is hardened, thereby results in a very high abrasion resistance. The hardening happens here gem. from the manufacturer, the Thyssen Steel AG, given heat treatment.

Preferably, a format device comprises a stranding machine the tobacco-processing industry according to the invention Inlet finger or a preferred inlet finger, as described above.

In addition, when a device for stripping Tobacco particles from a rope conveyor of a cigarette rod machine when handing over a tobacco rod from the strand conveyor into the format device which is in the Strangeinlaufbereich the format device arranged , is further developed, that at least a part a strand guide surface of the stripping device the steel alloy has a high titanium carbide content, is the life of such a stripping also significantly increased. Regarding the stripping device Reference is made in particular to EP 0 582 136 B1, in which a corresponding stripping device in detail is described and its disclosure in full to be included in this application. In the said European patent is in the field a scraping edge, at least when stripping the Tobacco particle interacts with the strand conveyor, a by embedding at least one layer of a fine-grained, abrasion resistant material formed surface great hardness provided. This surface is in the mentioned patent document preferably with polycrystalline Diamond stocked.

The main body of the stripping device also has a Strand guide surface, according to the invention with the corresponding steel alloy with high titanium carbide content at least partially provided. The strand guide surface Aligns in the format device in strand direction with the strand guide surface of the inlet finger and together with at least one other, opposite running strand guide surface of Formatting means a length of a strand channel. By preferably further development of the format device in such a way that at least part of the Strand guide surface of the stripping of the Steel alloy is made with high titanium carbide content is the service life of the stripper also increased.

Preferably, the steel alloy corresponds to high Titanium carbide content of the strand guide surface of the inlet finger the stripping device. It can therefore be identical Steel alloys are preferably used.

It is further preferably a stranding machine of tobacco-processing industry with a corresponding Format device according to the invention or a further development the format device according to the invention, such described above, provided.

Fig. 1

einen Längsschnitt durch den Formateinlauf einer Zigarettenstrangmaschine in einer schematischen Darstellung,

Fig. 2

eine Schnittdarstellung des Einlauffingers in Richtung A aus Fig. 1 in schematischer Darstellung, und

Fig. 3

eine Vorderansicht einer Abstreifvorrichtung, etwa in Richtung des Pfeiles C aus Fig. 1 in schematischer Darstellung.

The invention will now be described by way of example without limitation of the general inventive concept using exemplary embodiments with reference to the drawings, which are expressly referred to in the rest with respect to all details of the invention explained in detail in the text. Show it:

Fig. 1

a longitudinal section through the format inlet of a cigarette rod machine in a schematic representation,

Fig. 2

a sectional view of the inlet finger in the direction A of FIG. 1 in a schematic representation, and

Fig. 3

a front view of a scraper, approximately in the direction of arrow C of Fig. 1 in a schematic representation.

In Fig. 1 is the format inlet of a cigarette rod machine 1 shown. It shows the delivery end 2 of a Saugstrangförderers 3 and a format device 4 with a format bed 6, an inlet finger 7 and a Format part 8. The suction belt conveyor 3 runs in the direction of the arrow 11 in a tobacco channel 9 and promotes a Fiber strand of tobacco fibers (not shown) of a strand construction zone (also not shown) for Delivery to the format device 4. The fiber strand is suspended from the suction strand conveyor 3 in the tobacco channel 9, by means of a through the Saugstrangförderer passing through the suction train on Saugstrangförderer is held. The format bed 6 has no closer shown strand guide surface 12, the one in Cross-section curved channel forms, whose radius of curvature in the direction of the strand from the inlet cone 13 gradually decreases towards the format part and the in one formed according to the desired strand shape Strand channel 14 of the format part 8 opens. In the inlet cone 13, along the strand guide surface 12 and in the strand channel 14 is a circulating in the direction of arrow 16 Format tape 17 out, which is a wrapping material strip 18 by the format device 4 carries. The Technique of such machines is well known, so that a closer representation and description not here is required.

In the region of the inlet cone 13, the suction belt conveyor converges 3 to the strand guide surface of the format bed 6 and puts the in a not shown Strand building zone aufauerten and in the usual way equalized tobacco rod on the by the format device 4 moving wrapping material strip 18 on. there The tobacco rod is in its passage through the inlet cone 13 under the action of Saugstrangförderers. 3 strongly compressed and according to the cross-sectional change the inlet cone in the conveying direction 16 of the Formatbandes 17 deformed so that it partially in the the strand guide surface 12 of the format bed 6 enclosed Strand channel can shrink. In the area of the strand guide surface 12 is adjacent to the format bed 6 as Another strand guiding means of the inlet fingers 7 with arranged a scraper 25, which together with the Strand guide surface 12 of the format bed 6 a the Fiber strand further compressing and forming strand guide forms.

The scraper 25 is by means of screws 22 or other suitable fasteners frontally on the inlet finger 7 of the format device 4 attached. The scraper can also be integrally formed with the inlet finger be. The scraper consists of a base body 19, the underside of which is designed as a strand guiding surface 21 is and in the installation position of the scraper of the strand guide surface 12 of the format bed 6 is opposite, so that both strand guide surfaces 12 and 21 a strand guide channel 22 include. The strand guide surface 21 is to how the front view of the scraper gem. Fig. 3 shows concave and aligned with a concave Strand guide surface 23, which at the bottom of the Infeed finger 7 is formed. This training of Strand guiding surfaces effected in a known manner in Collaborate with further sharing the format S the Deforming the incoming tobacco rod into a cylindrical one Fiber strand while serving this Fiber strand with the Hüllmaterialstreifen 18th

The illustrated in Fig. 2 schematic section of the Point A of FIG. 1 shows the inlet finger 7, the one Steel alloy 30 according to the invention comprises, wherein a Lötnaht 31, the steel alloy 30 according to the invention with the rest of the inlet finger 7 connects. Well depicted is the strand guide surface 23, which is curved. The Steel alloy 30 according to the invention is with the Lötnaht 31 connected to a conventional steel alloy 32. A suitable steel alloy 32, which is commonly used is obtained from the company Engineer Precision, USA, New Jersey, sold under Product No .: 9.0406. Another suitable material obtained by sintering Powder material is formed to the finger part 32 is from Zapp GmbH & Co. KG, Germany, Ratingen, sold under the name CPM 10 V. Of course are also other steels or sintered metals for the realization of the steel alloy 32 of the inlet finger 7 suitable. It may also be that the inlet finger 7 completely made of a steel alloy according to the invention 30 exists.

The scraper 25 is shown in FIG. 3 in a schematic Front view in the direction of arrow C shown. Well to recognize the inlet end 24 and the abreibfeste Layer 27. The abrasion resistant layer can, as in the EP 0 582 136 D1 is described in detail, a diamond layer 27 include. The scraper edge 26 is on the Incoming 24 of the scraper is arranged, with the scraper edge 26 transversely to the direction 11 of the strand conveyor 3 is aligned and close to the surface the strand conveyor 3 or positioned adjacent to this is. In the surface of the scraper edge 26 is at least one layer 27 of a fine-grained abrasion resistant Embedded material. This layer 27 is made For example. Polycrystalline diamond and is in one Sintered cemented sintered carbide. The wiper edge 26 may also be made of a hard ceramic material, polycrystalline diamond in its surface is embedded. The diamond layer 27 extends the wiping edge 26 over the entire width of the strand conveyor 3 and thus reliably takes all Tobacco fibers from the strand conveyor 3 from. In this way The tobacco rod is reliable and completely from the Extruded conveyor 3 passed on the Hüllmaterialstreifen 18. By forming the wiper edge 26 made of hard metal and a coating with, for example, polycrystalline Diamond increases the wear resistance of the wiper edge to a significant extent and thereby extends their life considerably.

At the same time according to the invention, the strand guide surface 21 with the steel alloy according to the invention be provided with high titanium carbide content 30, whereby the life of the scraper 25 is significantly increased. By extending the replacement intervals will thus at the same time the economic efficiency of the machine use elevated.

The steel alloy according to the invention and preferred Embodiments of the steel alloy according to the invention have already been described above. It deals in particular a structure of titanium carbide and Martensite or a structure of titanium carbide and austenite. Preferred compositions of the corresponding inventive and preferred steel alloys are sold by Thyssen Stahl AG, Germany, Krefeld, under the brand name "FERRO-TITANIT" offered. The proportion of titanium carbide is preferably over 20 Gew% and in particular between 31% by weight and 35% by weight.

These materials have i.a. also the advantage that these in the processing of tobacco not taste-changing are. The corresponding components of the invention Steel alloys are not reactive with tobacco and flavor of tobacco.

The inlet finger 7 and / or the scraper 25 can gem. the invention in the figures, not shown channels have, from which a lubricating and / or cleaning fluid can emerge, so that the strand guide surfaces are even better sliding or cleaned can be. It is also possible, even Flavor off let the channels escape, so that the taste of the tobacco can be improved. The sliding and / or Cleaning liquid may preferably additionally also improve the taste of the tobacco.

The geometric design of the inlet finger can also different, as shown in Figs. 1 and 2, be. This can, for example, also have a shape that in Fig. 6 of US-PS 4,732,165 is shown. The revelation This patent is intended to be exhaustive in this Registration be included.

LIST OF REFERENCE NUMBERS

1

rod machine

2

delivery end

3

suction rod

4

garniture

6

garniture

7

intake finger

8th

format part

9

tobacco channel

11

arrow

12

Rod guide surface

13

intake cone

14

strand channel

16

arrow

17

format tape

18

wrapping material

19

body

21

Rod guide surface

22

screw

23

Rod guide surface

24

incoming

25

scraper

26

stripping

27

Abrasion-resistant layer

30

steel alloy

31

soldered seam

Claims (11)

1. An inlet finger (7) of a sizing mechanism (4) of a rod-forming machine (1) for compacting a rod of a material processed in the tobacco-processing industry, in particular of tobacco, during conveyance thereof along a rod guide surface (23) of the inlet finger, characterised in that the inlet finger (7) consists at least in part of a steel alloy (30) with an elevated titanium carbide content.
2. An inlet finger (7) according to claim 1, characterised in that at least part of the rod guide surface (23) consists of the steel alloy (30) with elevated titanium carbide content.
3. An inlet finger (7) according to claim 1 and/or claim 2, characterised in that the steel alloy (30) is a powder-metallurgically produced steel alloy.
4. An inlet finger (7) according to one or more of claims 1 to 3, characterised in that the titanium carbide content of the steel alloy is over 20%.
5. An inlet finger (7) according to claim 4, characterised in that the titanium carbide content of the steel alloy is between 31 wt.% and 35 wt.%, in particular between 32 wt.% and 34 wt.%.
6. An inlet finger (7) according to one or more of claims 1 to 5, characterised in that the binder phase is martensite or austenite.
7. An inlet finger (7) according to one or more of claims 1 to 6, characterised in that the steel alloy (30) is hardened.
8. A sizing mechanism (4) of a rod-forming machine (1) of the tobacco-processing industry, having an inlet finger (7) according to one or more of claims 1 to 7.
9. A sizing mechanism (4) according to claim 8, characterised in that a device (25) is additionally provided for stripping tobacco particles from a rod-conveyor (3) of a cigarette rod-forming machine on transfer of a tobacco rod from the rod conveyor (3) to the sizing mechanism (4), which device is arranged in the rod inlet area of the sizing mechanism (4), wherein at least part of a rod guide surface (21) of the stripping device (25) consists of the steel alloy (30) with elevated titanium carbide content.
10. A sizing mechanism according to claim 8 and/or claim 9, characterised in that the steel alloy with elevated titanium carbide content of the rod guide surface (23) of the inlet finger (7) corresponds to that of the stripping device (25).
11. A rod-forming machine of the tobacco-processing industry having a sizing mechanism (4) according to one or more of claims 8 to 10.

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