JP2003219854A - Inflow finger of molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the improvement in the quality of a strand for an existing inflow finger, especially improve the durable period of the inflow finger. <P>SOLUTION: The inflow finger of the molding machine of a strand machine for compressing a strand from a material to be treated in a smoke-processing industry, especially tobacco, during transportation along the strand guide face of the inflow finger is characterized in that the inflow finger comprises at least partially a steel alloy having a high titanium carbide rate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an inflow finger.
Of the material to be processed in the tobacco processing industry during transport along the strand guide surface, in particular of an inlet finger of a forming device of a strand machine for compressing strands from tobacco. The invention further relates to a forming device for a strand machine of the tobacco processing industry.

The inflow fingers of the forming apparatus are used to compress strands of material processed in the tobacco processing industry, in particular tobacco or other tobacco materials. Here, compression takes place during the transport of the strands along the fingers with a reduction in the cross section of the strands.

To produce cigarette strands,
The tobacco passages, which circulate in the tobacco passage, are usually disintegrated and the disentangled tobacco fibers are finished into fiber strands, which are circulated through a molding band which is circulated over the filler material film which has been moved to a molding device. ,
Prior to being replaced by a filling material film, for example a cigarette paper film, into the forming device, the fiber strands thereof are continuously discharged from the strand-forming region and equalized. A filling material film is installed around the strands,
Before being closed, usually by wrapping around the strands to form a cylindrical skin along the overlapping seam,
The filling material film which firstly flows in flat in the entry area of the forming device is first formed in a U-shape around the fiber strands during the passage through the forming device.

[0004]

BACKGROUND OF THE INVENTION A molding station or apparatus for cigarette machines is described, for example, in U.S. Pat. No. 4,732,165. With strong compression of the strands along the inflow finger, the quality of the tobacco strands can be significantly impaired. Poor tobacco strand quality can result in dampening due to friction of the tobacco material with the guide surfaces associated with the inflow fingers, which can further cause seal variations. This has a short service life, since at suitable high friction values the inflow fingers are consumed relatively quickly due to the relatively high mechanical stresses.

[0005]

The object of the present invention is to achieve an improvement in the quality of the strands with respect to the existing inflow fingers, in particular to improve the service life of the inflow fingers as much as possible.

[0006]

This problem is addressed by materials that are processed in the tobacco processing industry during transport along the strand guide surface of an inflow finger, especially inflow fingers of a forming machine of a strand machine for compressing strands from tobacco. In -the inflow finger is solved by at least partially consisting of a steel alloy with a high titanium carbide content.

Due to the use of steel alloys with a high titanium carbide content, the high service life of the inflow fingers is extremely high because surprising cigarettes or tobacco particles are guided very well along with the steel alloys with a high titanium carbide content. A low coefficient of friction is achieved by the presence of different humidity values between the inflow finger and the tobacco particles, especially at high strand velocities above 100 m / min. Due to the high slip characteristics or the low coefficient of friction, less wear of the inflow fingers occurs.

In particular, at least part of the strand guide surface consists of a steel alloy with a high titanium carbide content. With the embodiments of the invention, it is possible, for example, to equip a small part of the inlet finger with a steel alloy with a high titanium carbide proportion, so that costs can be saved. For this purpose, in particular, a block member surrounds the strand guide surface and is provided with an inflow finger.
It is either soldered to another part or bonded and sintered. For this purpose, relatively thin layers of steel alloys with a high titanium carbide content can be produced selectively by laser ablation or by thermal steam (Thermischem Verdampfen) or electron radiant steam (Elektronen-strahlverdampfen). It is possible.

Particularly wear-resistant steel alloys can be achieved if the steel alloy is a powder metallurgically produced steel alloy.

In a preferred embodiment, the titanium carbide content of the steel alloy exceeds 20% by weight. In a more preferred embodiment of the invention, the titanium carbide content of the steel alloy is between 31% and 35% by weight, in particular between 32% and 34% by weight.

In particular, the binder phase is martensite or austenite. In the binder phase consisting of martensite,
A very good steel alloy to be processed results, which has a high corrosion resistance depending on the carbon content. The constituents of martensite and their proportions lead to the following questions, for example: C: 0.5-0.65% by weight, Cr: 3.0-19.5% by weight, Mo: 2.0-3.0% by weight. %, Cu: 1.0-1.5% by weight, Ni: 0-0.25% by weight, Fe: Remainder.

With austenite as the binder phase, excellent corrosion resistance and excellent wear resistance are achieved. The constituents in austenite are especially as follows: 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. Preferred steel alloys with a high titanium carbide content include, among others, Oberschlesienstras16, Krefeld's trade name Ferro-Titanit (trade name of Thyssn Stahl AG).
FERRO-TITANIT) steel alloy is suitable. In the structure of titanium carbide and martensite, the preferred alloy is ferro-
Titanit-C-Special (FERRO-TITANIT-C-Speial) (3
3.0 wt% titanium carbide fraction) and FERRO-TITANIT-S (at 32 wt% titanium carbide fraction).

In particular, steel alloys are hardened, which results in extremely high wear resistance. In this case, the hardening takes place by a heat treatment given by the manufacturer, Thyssn Stahl AG.

The forming device of a strand machine, especially in the tobacco processing industry, comprises an inflow finger according to the invention or a preferred inflow finger as described above.

Furthermore, a device for removing tobacco particles from the strand carrier of the cigarette strand machine during the transition of the cigarette strands from the strand carrier to the shaping device is arranged in the strand entry area of the shaping device and is located in the scraping device. If at least part of the strand guide surface is formed by a steel alloy with a high titanium carbide content, the service life of a scraping device of this kind is clearly improved. Regarding the scraping device, European Patent No. 058213
No. 6, in which a suitable scraping device is described in detail, the disclosure of which is fully incorporated in this application. In said European patent specification, the area of the scraping edge which cooperates with the strand carrier during the removal of tobacco particles is provided with a high hardness surface formed by the embedding of at least one layer of particulate wear resistant material. Has been. In the patent specification, this surface is provided with polycrystalline diamond.

The substrate of the scraping device has according to the invention a strand guide surface which at least partially comprises a steel alloy with a high titanium carbide content. The strand guide surface is aligned in a straight line with the strand guide surface of the inflow finger in the forming device in the direction of strand travel and together with at least one oppositely running strand guide surface of the forming device forms the longitudinal section of the strand passage. To do. According to a preferred embodiment of the shaping device, at least part of the strand guide surface of the scraping device is made of a steel alloy with a high titanium carbide content, which improves the service life of the scraping device.

Steel alloys, in particular with a high titanium carbide content, coincide with the strand guide surface of the inlet finger of the scraping device. Therefore, the same steel alloy can be used in particular.

More preferably, the strand machine of the tobacco processing industry is equipped with a suitable inventive molding device or the inventive molding device described above.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS The invention is based on the following examples, without any limitation of the general inventive idea, with reference to the drawings, which clearly show all the details of the invention which are not described in detail in the text: Samplely described in. 1 shows a schematic longitudinal section through a forming device of a cigarette strand machine, FIG. 2 shows a schematic sectional view of an inlet finger in the direction A of FIG. 1, and FIG. 3 shows scraping in the direction of arrow C in FIG. Figure 2 shows a schematic front view of the device.

FIG. 1 shows the shaping inlet of a cigarette strand machine 1. The figure shows a molding device 4 comprising a suction strand carrier 3, a molding bed 6, an inflow finger 7 and a molding member 8. The suction strand conveyor 3 circulates in the direction of the arrow 11 in the tobacco passage 9 and conveys fiber strands (not shown) of tobacco fibers from the strand-constituting area (also not shown) to the discharge part in the forming device 4. The fiber strands are hung and conveyed in the tobacco passage 9 to the strand carrier 3, while the fiber strands are held in the suction strand carrier by the suction force acting through the suction strand carrier 3. The forming bed 6 has a strand guide surface 12 which is not shown in detail, which guide surface forms an arcuate strand passage of cross-section, the arcuate radius of which forms from the inflow cone 13 in the direction of travel of the strand. The strip passage is continuously removed up to the portion and communicates with the strand passage 14 formed in conformity with the desired strand shape of the molding member 8. Inflow cone 13 along strand guide surface 12 and strand passage 1
4 is guided by a forming belt 17 circulating in the direction of the arrow 16, which conveys the filling material 18 by means of the forming device 4. The technology of this type of machine is well known and does not require a detailed representation and description here.

In the region of the inflow cone 13, the suction strand carrier 3 converges on the strand guide surface of the forming bed 6,
The tobacco strands, which have been looked up in a strip-forming zone (not shown) and have become uniform in the usual way, are placed on the filling material film 18 which has been moved through the shaping device 4. At that time, the tobacco strand is strongly compressed under the action of the suction strand carrier 3 through the inflow cone 13 during its passage, and in the transfer direction 16 of the forming belt 17 in conformity with the change in the cross section of the inflow cone 13. Once formed, the tobacco strands can flow into the strand passages partially surrounded by the strand guide surface 12 of the forming bed 6. In the region of the strand guide surface 12 adjoining the forming bed 6 is arranged an inflow finger 7 with a scraper 25 as another strand guiding means, together with the strand guide surface 12 of the forming bed 6 the fibers. The strand guide is formed by further compressing the strand.

The scraper 25 is attached to the inlet finger 7 of the molding apparatus 4 by means of bolts 22 or other suitable fixing means.
Fixed to the front of the. The scraper can also be formed in one piece with the inflow finger 7. The scraper is the base 1
9, the lower surface of the base body is formed as a strand guide surface 21 and is arranged to face the strand guide surface 12 of the forming bed 6 at the installation position of the scraper, so that both strand guide surfaces 12 and 21 are The passage 22 is formed. To that end, as the front view of the scraper is shown in FIG. 3, the strand guide surface 21 is concavely curved and aligned with the strand guide surface 23, the strand guide surface 23 of the inflow finger 7 being in line. Formed on the bottom surface. The construction of this strand guide surface cooperates with the other members of the format S in a known manner to form the filling material film 18.
And forming the tobacco strands arriving upon simultaneous replacement of the fiber strands into cylindrical fiber strands.

The schematic cross-section shown in FIG. 2 at point A in FIG. 1 shows an inflow finger 7 containing a steel alloy 30 of the invention, and a solder seam 31 of the steel alloy 30 of the invention of the inflow finger 7. Combine with the rest. The curved strand guide surface 23 is well illustrated. The steel alloy 30 of the present invention is joined to a normal steel alloy 32 by a solder seam 31. A suitable steel alloy 32 that can be normally used is a US engineer's precision engineer (Fa. Engineer P
recision) under product number: 9.0406. Other suitable materials formed on the finger member 32 by sintering powdered material are Fa., Rattengen, Germany.
Featured by Zapp GmbH & KG under the name CPM 10 V. Of course, other steels or sintered metals are also suitable for realizing the steel alloy 32 of the inflow finger-7. That is, the inflow fingers 7 consist entirely of the steel alloy 30 of the present invention.

The scraper 25 is shown in the direction of arrow C in the schematic front view in FIG. The inflow end 24 and the abrasion resistant layer 27 are clearly visible. The abrasion resistant layer is as described in EP 0582136,
Includes diamond layer 27. The scraping edge 26 is arranged at the inflow end 24 of the scraper, and the scraping edge 2
6 are aligned transversely to the running direction 11 of the strand carrier 3 and are hermetically positioned in front of or adjacent to the surface of the strand carrier 3. Scraping edge 2
Embedded in the surface of 6 is at least one layer 27 of particulate abrasion resistant material. This layer 27 consists of, for example, polycrystalline diamond and is sintered to a hard metal underlayer.
The scraping edge 26 is made of a hard ceramic material and has polycrystalline diamond embedded on its surface. The diamond 27 extends over the entire width of the strand carrier 3 to the scraping edge 26 and in this way ensures that all tobacco fibers are removed from the strand carrier 3. In this way, the tobacco strands are reliably and completely delivered from the strand carrier 3 onto the filling material film 18. By virtue of the construction of the scraping edge 26, which consists of a hard metal and a coating comprising, for example, polycrystalline diamond, the abrasion resistance of the scraping edge is substantially improved, and thereby its service life is significantly extended.

At the same time, according to the invention, the strand guide surface 21 comprises a steel alloy according to the invention with a high titanium carbide content of 30, which improves the service life of the scraper 25. Therefore, the extension of the replacement interval simultaneously improves the economics of machine utilization.

The preferred embodiments of the steel alloy according to the invention and the steel alloy according to the invention have already been described above. Particularly, the structure of titanium carbide or martensite or the structure of titanium carbide or austenite is important. A suitable invention and a preferred composition of the preferred steel alloys are provided by Thyssn Stahl AG of Krefeld, Germany under the trade name FERRO-TITANIT. The proportion of titanium carbide is in particular above 20% by weight, in particular between 31% and 35% by weight.

These materials have the advantage, inter alia, that they are not taste-altered during tobacco processing. Suitable constituents of the steel alloys of this invention do not react with tobacco or tobacco flavor.

Inflow finger 7 and / or scraper
25 has a passageway not shown in the figure according to the invention, from which slipping and / or cleaning fluid can be discharged, so that the strand guiding surface can be even better slipped or cleaned. Besides, it is possible that the taste of cigarettes can be improved, as the flavor is also drained from the passage. The sliding and / or cleaning fluid may additionally preferably also improve the taste of the cigarette.

Inflow finger geometries may exist other than those shown in FIGS. It may also have the shape illustrated in FIG. 6 of US Pat. No. 4,732,165, for example. The publication of this patent is fully incorporated into this application.

【The invention's effect】

According to the present invention, the existing inflow finger
To improve the quality of the strands, especially for the inflow fingers as much as possible.

By virtue of the construction of the scraping edge, which consists of a hard metal and a coating comprising, for example, polycrystalline diamond, the abrasion resistance of the scraping edge is essentially improved, whereby its service life is significantly extended.

At the same time, according to the invention, the strand guide surface comprises a steel alloy according to the invention with a high titanium carbide content, which also improves the service life of the scraper. Therefore, the change in the replacement interval simultaneously improves the economics of machine utilization.

The steel alloy of the present invention, particularly the structure of titanium carbide or martensite or the structure of titanium carbide or austenite is important. These materials have, inter alia, the advantage that they do not taste-modify during tobacco processing. Suitable constituents of the steel alloys of this invention do not react with tobacco or tobacco flavor.

The inflow fingers and / or scrapers have passages, not shown according to the invention, from which slipping and / or cleaning fluid can be discharged, so that the strand guiding surface slides even better or Can be cleaned. Besides, it is possible that the taste of cigarettes can be improved, as the flavor is also drained from the passage. The sliding and / or cleaning fluid may additionally preferably also improve the taste of the cigarette.

[Brief description of drawings]

FIG. 1 shows a schematic longitudinal section through a forming device of a cigarette strand machine.

FIG. 2 shows a schematic sectional view of an inflow finger in the direction A of FIG.

3 shows a schematic front view of the scraping device in the direction of arrow C in FIG.

[Explanation of symbols]

1. ． ． ． ． Strand machine 2. ． ． ． ． Delivery end 3. ． ． ． ． Suction strand carrier 4. ． ． ． ． Molding equipment 6. ． ． ． ． Molding bed 7. ． ． ． ． Inflow finger 8. ． ． ． ． Molded member 9. ． ． ． ． Tobacco passage 11. ． ． ． ． Arrow direction 12. ． ． ． ． Strand guide surface 13. ． ． ． ． Inflow cone 14. ． ． ． ． Strand passage 16. ． ． ． ． Arrow direction 17. ． ． ． ． Forming belt 18. ． ． ． ． Filling material film 19. ． ． ． ． Substrate 21. ． ． ． ． Strand guide surface 22. ． ． ． ． bolt 23. ． ． ． ． Strand guide surface 24. ． ． ． ． Inflow end 25. ． ． ． ． bolt 26. ． ． ． ． Scraping edge 27. ． ． ． ． Abrasion resistant layer 30. ． ． ． ． Steel alloy 31. ． ． ． ． Solder seam

Claims (11)

[Claims] 1. A strand guide surface (2) of an inflow finger.
3) Materials processed in the tobacco processing industry during transport along
In particular in an inlet finger (7) of a forming device (4) of a strand machine (1) for compressing strands from cigarettes, the inlet finger (7) is at least partially from a steel alloy (30) having a high titanium carbide content. An inflow finger characterized by being made. 2. Inflow finger according to claim 1, characterized in that at least part of the strand guide surface (23) consists of a steel alloy (30) with a high titanium carbide content.
(7). 3. Inflow finger (7) according to claim 1 or 2, characterized in that the steel alloy (30) is a powder metallurgically produced steel alloy. 4. Inflow finger (7) according to any one of claims 1 to 3, characterized in that the titanium carbide content of the steel alloy exceeds 20%. 5. The titanium carbide content of the steel alloy is 31% by weight.
And 35% by weight, in particular between 32% and 34% by weight, inflow finger according to claim 4.
(7). 6. The inflow finger (7) according to any one of claims 1 to 5, wherein the binder phase is martensite or austenite. 7. Inflow finger (7) according to any one of claims 1 to 6, characterized in that the steel alloy (30) is hardened. 8. A molding device (4) for a strand machine (1) of the tobacco processing industry, which comprises an inflow finger (7) according to any one of claims 1 to 7. 9. A device (25) is provided for scraping tobacco particles from the strand carrier (3) of a cigarette strand machine during the transfer of the cigarette strands from the strand carrier (3) to the forming device (4), Arranged in the strand inflow region of the shaping device (4), characterized in that at least part of the land guide surface (21) of the scraping device (25) consists of a steel alloy (30) with a high titanium carbide content. Item 9. A molding device (4) according to item 8. 10. The steel alloy having a high titanium carbide content is matched to the strand guide surface (22) of the inflow finger (7) of the scraping device (25).
Alternatively, the molding apparatus according to claim 9. 11. Strand machine in the tobacco processing industry, comprising a shaping device (4) according to any one of claims 8 to 10.