DE102020123602A1 - Conveyor drum in the tobacco processing industry - Google Patents

Abstract

The invention relates, inter alia, to a conveyor drum (10) in the tobacco processing industry for, in particular transversely axial, conveying of rod-shaped articles (20) in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, with an outer drum body (12), the outer drum body being in has grooves (14) arranged one behind the other in the circumferential direction for the rod-shaped articles, without a groove base, and with an inner drum body (16) which is surrounded by the outer drum body (12), the inner drum body having a rolling surface (18) facing the outer drum body (12) for the rod-shaped articles arranged in the receiving grooves (14) of the outer drum body (12), the rolling surface (18) of the inner drum body (16) being designed as a lateral surface or as a partial lateral surface of a truncated cone or as a lateral surface or as a partial lateral surface of a cone.

Description

The invention relates to a conveying drum in the tobacco processing industry and a conveying arrangement for conveying, in particular transversely axially, rod-shaped articles in the tobacco processing industry.

The invention also relates to a machine in the tobacco processing industry for producing rod-shaped articles, in particular filter rods or filter pieces or cigarettes, and a method for conveying, in particular transversely axially, rod-shaped articles in the tobacco processing industry.

Conveyor drums are used in machines in the tobacco processing industry, in particular filter attachment machines or machines for manufacturing smoking products or alternative smoking products, such as heat-not-burn products or e-cigarettes, to transport cigarettes, filter pieces and their components.

In modern production machines in the tobacco processing industry, the rod-shaped objects mentioned are generally conveyed during the manufacture of cigarettes, filters or filter cigarettes or so-called heat-not-burn products or e-cigarettes by means of conveying drums whose lateral surface or outer surface rotates driven drum bodies for transverse-axial conveying of rod-shaped articles (cigarettes, filter rods or filter plugs, filter cigarettes or the like) are provided with receiving troughs for receiving the rod-shaped articles. During conveyance, these rod-shaped articles of the tobacco processing industry are generally arranged in rows transversely axially one behind the other on the conveying drums in receiving troughs.

In filter tipping machines, rod-shaped articles, such as tobacco rods or filter plugs or filter rods, are conveyed transversely axially into receiving troughs of the conveyor drum. Here, the receiving troughs are arranged in predetermined sections on the peripheral surface of the conveyor drum.

One object of the present invention is to enable a longitudinal axial movement of the rod-shaped articles, in particular in the receiving recesses, in a simple manner on a conveyor drum in the tobacco processing industry, for example during the conveyance of rod-shaped articles.

This object is achieved by a conveyor drum in the tobacco processing industry for conveying, in particular cross-axially, rod-shaped articles in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, with an outer drum body, the outer drum body having groove-free receiving grooves arranged one behind the other in the circumferential direction for the rod-shaped article and with an inner drum body, which is surrounded by the outer drum body, wherein the inner drum body has a rolling surface facing the outer drum body for the rod-shaped articles arranged in the receiving grooves of the outer drum body, the rolling surface of the inner drum body being a lateral surface or a partial lateral surface a truncated cone or as a lateral surface or as a partial lateral surface of a cone.

The invention is based on the idea that the conveyor drum is set up to receive rod-shaped articles in the receiving grooves, with the rod-shaped articles being moved in the longitudinal axial direction in the receiving grooves, in particular during their transverse axial conveyance on the conveying drum. In particular, when the rod-shaped articles are conveyed in the receiving grooves of the outer drum body without a groove base in a conveying area of the rod-shaped articles, the rod-shaped articles are pushed into a Offset rotational movement about its longitudinal axis, so that the rod-shaped articles are moved in the receiving grooves in the longitudinal axial direction.

The receiving grooves of the outer drum body are designed without a groove base, so that the rod-shaped articles arranged in the receiving grooves of the outer drum body are or are brought into contact with the rolling surface of the inner drum body in the conveying area of the conveying drum for the rod-shaped articles. For this purpose, the rolling surface of the inner drum body is designed as a lateral surface or partial lateral surface of a truncated cone or a cone. In particular, the receiving grooves for the rod-shaped items are (slightly) wider than the diameter of the rod-shaped items for this purpose. The fact that the receiving grooves are designed without a groove base on their underside or open inward towards the inside of the conveyor drum allows the rod-shaped articles to roll on the inner drum body in the conveying area of the rod-shaped articles due to the contact with the rolling surface of the inner drum body, whereby the Rod-shaped articles are rotated about their longitudinal axis or are.

In particular, the receiving grooves of the outer drum body are formed without a groove base, ie without a groove base, between the flanks of the receiving groove that delimit the respective receiving groove. For this purpose, the receiving grooves preferably have a continuous opening or the like between the flanks of the groove.

In a preferred development of the conveyor drum, it is provided that the outer drum body has an inside facing the inner drum body, the inside of the outer drum body being designed to complement the rolling surface of the inner drum body. In particular, the inside of the outer drum body is conical. There is preferably a distance of 0.08 mm to 0.8 mm between the rolling surface of the inner drum body and the inside of the outer drum body.

In addition, it is advantageous in one embodiment of the conveyor drum that the outer drum body has an outer side in the shape of a cylinder jacket. The result of this is that the conveyor drum has a cylindrical shape or configuration, with the surface line of the outer drum body being parallel to the axis of rotation or central axis of the conveyor drum.

A further embodiment of the conveyor drum is characterized in that the receiving grooves of the outer drum body each have a longitudinal extent or a longitudinal axis, the longitudinal extents or the longitudinal axes of the receiving grooves being inclined, in particular non-parallel, to the central axis of the outer drum body and/or inclined, in particular are non-parallel to the surface line of the outer drum body. As a result, the receiving grooves of the outer drum body extend non-parallel and skewed to the central axis of the outer drum body or to the axis of rotation of the conveyor drum. In particular, the receiving grooves of the outer drum body are designed such that an angle of preferably 0.5° to 3° is formed between the central axis of the outer drum body or the surface line of the outer drum body and the longitudinal axis or the longitudinal extension of the receiving grooves. As a result, the receiving grooves are aligned (slightly) obliquely, and in particular skewed, to the drum axis or central axis of the outer drum body, as a result of which the rod-shaped articles roll helically on the inner drum body in the longitudinal direction of the receiving grooves in the conveyor area of the conveyor drum on the conically shaped rolling surface of the inner drum body and are thus moved in the direction of their longitudinal axis, ie longitudinally axially, within the receiving grooves.

In addition, it is preferred that the receiving grooves of the outer drum body are continuously formed without a groove base.

In addition, one embodiment of the conveyor drum is characterized in that the receiving grooves of the outer drum body each have two straight or curved groove flanks or groove flank sections extending along their longitudinal extension. The receiving grooves are delimited by the groove flanks or groove flank sections along their longitudinal extension in the outer drum body.

In order to enable a trouble-free rotation of the rod-shaped articles within the receiving grooves, it is advantageously provided in the conveyor drum that the groove flanks or the groove flank sections have a chamfer or a bevel on the outside of the outer drum body. This prevents, for example, the end edges of strips of wrapping material of the rod-shaped articles from getting caught on an edge of the groove flanks or the groove flank sections during the rotation of the rod-shaped articles.

Furthermore, an embodiment of the conveyor drum is characterized in that the outer drum body is rotatable or driven or can be driven in rotation or that the outer drum body is stationary.

In order to rotate the rod-shaped articles within the receiving grooves of the outer drum body, a relative movement is carried out between the outer drum body and the inner drum body about an axis of rotation of the conveyor drum. In particular, the central axis of the outer drum body is collinear with the axis of rotation of the conveyor drum.

In a further development of the conveyor drum, it is also preferable for the inner drum body to be designed as a control body for controlling and subjecting the rod-shaped articles arranged in the receiving grooves of the outer drum body to negative pressure in a conveying area of the rod-shaped articles on the conveyor drum, with the inner drum body in particular being at least has a suction air opening or at least one control slot. Because the inner drum body is designed as a control body, it is possible to subject the rod-shaped articles arranged in the receiving grooves of the outer drum body to negative pressure in a conveying area of the conveying drum It is possible that during a rotational movement of the outer drum body in relation to the inner drum body, the rod-shaped articles are held in the receiving grooves and at the same time are or are set in rotation due to the contact of the rod-shaped articles with the rolling surface of the inner drum body, whereby the rod-shaped articles during their transverse axial promotion on the outer drum body are simultaneously moved in the longitudinal axial direction within the receiving grooves.

The inner drum body preferably has a conicity, as a result of which the rolling surface of the inner drum body is designed as a (partial) lateral surface of a truncated cone or a cone.

In order to cause the rod-shaped articles to rotate about their respective longitudinal axes within the receiving grooves, one embodiment of the conveyor drum provides that the rolling surface of the inner drum body has a rough surface, preferably in the conveying area of the rod-shaped articles, and/or a surface with at least one has hardened layer.

In addition, in a development of the conveyor drum, it is provided that the inner drum body is rotatable or rotationally driven or can be driven, or that the inner drum body is arranged in a stationary manner.

In the context of the invention it is provided that in one embodiment the outer drum body is rotated while the inner drum body is stationary. In addition, it is also possible for both the inner drum body and the outer drum body to be rotated simultaneously, preferably at different rotational speeds. Furthermore, it is possible in a further variant that the outer drum body is stationary while the inner drum body is rotated relative to the outer drum body.

Furthermore, the object is achieved by a conveyor arrangement for, in particular cross-axial, conveying of rod-shaped articles of the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, which is designed with a conveyor drum according to the invention described above. To avoid repetition, reference is expressly made to the above statements.

The object is also achieved by a machine in the tobacco processing industry for producing rod-shaped articles in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, which is provided with a conveyor drum in the tobacco processing industry as described above. In this regard, reference is also expressly made to the statements made above.

The object is also achieved by a method for conveying, in particular transversely axially, rod-shaped articles in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, the rod-shaped articles being conveyed transversely axially using a conveyor drum described above.

During the conveyance of the rod-shaped articles in a conveying area, the rod-shaped articles are brought into contact with the rolling surface of the inner drum body, the rod-shaped articles rolling in the receiving grooves on the rolling surface of the inner drum body.

The receiving grooves of the outer drum body are preferably designed in such a way that the flank of the receiving grooves trailing in the conveying direction is designed as a sliding edge, with the outer end of the sliding edges of the receiving grooves being above the center of the article or the longitudinal axis of the article or below the middle of the article, for example in the middle third of the Article arranged or formed.

Further features of the invention will be apparent from the description of embodiments of the invention taken together with the claims and the accompanying drawings. Embodiments according to the invention can fulfill individual features or a combination of several features.

• 1 schematisch einen Querschnitt durch eine erfindungsgemäße Fördertrommel der Tabak verarbeitenden Industrie,
• 2 schematisch eine Ansicht der Fördertrommel und
• 3 schematisch eine perspektivische Ansicht eines äußeren Trommelkörpers für die Fördertrommel.

The invention is described below without restricting the general inventive concept using exemplary embodiments with reference to the drawings, with express reference being made to the drawings with regard to all details according to the invention not explained in more detail in the text. Show it:

• 1 schematically a cross section through a conveyor drum according to the invention of the tobacco processing industry,
• 2 schematic view of the conveyor drum and
• 3 schematically a perspective view of an outer drum body for the conveyor drum.

Within the scope of the invention, features that are marked “particularly” or “preferably” are to be understood as optional features.

In the drawings, elements and/or parts that are the same or of the same type are provided with the same reference numbers, so that they are not presented again in each case.

In 1 a cross section through a conveyor drum 10 according to the invention for conveying rod-shaped articles is shown schematically. The conveyor drum 10 is a component of a schematically indicated filter attachment machine F or another drum machine or conveyor arrangement for conveying rod-shaped articles. In 2 a view of the conveyor drum 10 is shown.

The conveyor drum 10 has an outer drum body 12, which has receiving grooves 14 arranged one behind the other in the circumferential direction, in which the rod-shaped articles 20 are arranged (cf. 2 ). The outer drum body 12 is mounted to rotate and is driven in rotation by means of a drive (not shown here).

The outer drum body 12 surrounds an inner drum body 16 , the inner drum body 16 having a rolling surface 18 for the rod-shaped articles 20 on its outer side facing the outer drum body 12 . Due to the conicity of the inner drum body 16, the rolling surface 18 is designed as the lateral surface of a truncated cone. In one embodiment, the rolling surface 18 is formed as a partial lateral surface of a truncated cone, with the rolling surface 18 being formed in the conveying area of the rod-shaped articles on the conveying drum 10 .

In 3 A perspective view of the outer drum body 12 is shown schematically. The outer drum body 12 has receiving grooves 14 arranged at regular intervals in the circumferential direction, which are designed without a groove base, so that the rod-shaped articles 20 in the receiving grooves 14 are brought into contact with the rolling surface 18 of the inner drum body 16 while they are being conveyed on the conveyor drum 10.

In their longitudinal extension, the receiving grooves 14 are aligned obliquely to the generatrix of the outer drum body 12 or obliquely, i.e. not parallel, and skewed to the axis of rotation of the conveyor drum 10, so that when the rod-shaped articles 20 come into contact with the rolling surface 18, the latter rotates when the outer Drum body 12 are rotated relative to the inner drum body 16, while the rotating rod-shaped articles 20 are moved in the receiving grooves 14 in the longitudinal axial direction. Here, the rod-shaped articles roll helically on the rolling surface 18 along the receiving grooves 14, whereby they are simultaneously moved during the transverse axial conveyance on the conveying drum 10 due to the rotary movement in the longitudinal axial direction.

In particular, the inner drum body 16 is designed as a control body and has suction air bores (not shown here) or control slots, for example in the circumferential direction, so that the rod-shaped articles 20 lying on the rolling surface 18 and arranged in the receiving grooves 14 are subjected to negative pressure in the conveying area of the rod-shaped articles Article 20 can be charged. For this purpose, the interior of the inner drum body 16 is connected to a vacuum source.

The inside of the outer drum body 12, which faces the inner drum body 16, is designed to be complementary in shape to the conically shaped outside of the inner drum body 16.

The receiving grooves 14 are delimited by a leading groove flank 141 and a trailing groove flank 142, the groove flanks 141, 142 having a chamfer 143 on the outside of the drum body 12.

All of the features mentioned, including those that can be taken from the drawings alone and also individual features that are disclosed in combination with other features, are considered essential to the invention alone and in combination. Embodiments according to the invention can be fulfilled by individual features or a combination of several features.

Reference List

10

conveyor drum

12

outer drum body

14

receiving groove

16

inner drum body

18

rolling surface

20

rod-shaped articles

141

groove side

142

groove side

143

chamfer

f

filter attachment machine

Claims (14)

Conveyor drum (10) in the tobacco processing industry for conveying, in particular cross-axially, rod-shaped articles (20) in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, with an outer drum body (12), the outer drum body being in has grooves (14) arranged one behind the other in the circumferential direction for the rod-shaped articles, without a groove base, and with an inner drum body (16) which is surrounded by the outer drum body (12), the inner drum body having a rolling surface (18) facing the outer drum body (12) for the rod-shaped articles arranged in the receiving grooves (14) of the outer drum body (12), the rolling surface (18) of the inner drum body (16) being designed as a lateral surface or as a partial lateral surface of a truncated cone or as a lateral surface or as a partial lateral surface of a cone. Conveyor drum (10) after claim 1 , characterized in that the outer drum body (12) has an inner drum body (16) facing the inside, wherein the inside of the outer drum body (12) is complementary in shape to the rolling surface (18) of the inner drum body (16). Conveyor drum (10) after claim 1 or 2 , characterized in that the outer drum body (12) has a cylinder jacket-shaped outside. Conveyor drum (10) according to one of Claims 1 until 3 , characterized in that the receiving grooves (14) of the outer drum body (12) each have a longitudinal extension or a longitudinal axis, the longitudinal extensions or the longitudinal axes of the receiving grooves (14) being inclined, in particular non-parallel, to the central axis of the outer drum body (12) and/or at an angle, in particular non-parallel, to the generating line of the outer drum body (12). Conveyor drum (10) according to one of Claims 1 until 4 , characterized in that the receiving grooves (14) of the outer drum body (12) are continuously formed without a groove base. Conveyor drum (10) according to one of Claims 1 until 5 , characterized in that the receiving grooves (14) of the outer drum body (12) each have two straight or curved groove flanks (141, 142) or groove flank sections extending along their longitudinal extent. Conveyor drum (10) after claim 6 , characterized in that the groove flanks (141, 142) or the groove flank sections on the outside of the outer drum body (12) have a chamfer (143) or a bevel. Conveyor drum (10) according to one of Claims 1 until 7 , characterized in that the outer drum body (12) is rotatable or rotationally driven or drivable or that the outer drum body (12) is stationary. Conveyor drum (10) according to one of Claims 1 until 8th , characterized in that the inner drum body (16) is designed as a control body for controlling and applying negative pressure to the rod-shaped articles arranged in the receiving grooves (14) of the outer drum body (12) in a conveying area of the rod-shaped articles on the conveyor drum (10), in particular the inner drum body (16) having at least one suction air opening or at least one control slot. Conveyor drum (10) according to one of Claims 1 until 9 , characterized in that the rolling surface (18) of the inner drum body (16) has a rough surface, preferably in the conveying area of the rod-shaped articles (20), and/or has a surface with at least one hardened layer. Conveyor drum (10) according to one of Claims 1 until 10 , characterized in that the inner drum body (16) is rotatable or rotationally driven or drivable or that the inner drum body (16) is arranged stationary. Conveying arrangement for, in particular transversely axial, conveying of rod-shaped articles (20) of the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, with a conveying drum (10) according to one of Claims 1 until 11 . Machine in the tobacco processing industry for producing rod-shaped articles (20) in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, with a conveyor drum (10) according to one of Claims 1 until 11 . Method for, in particular cross-axial, conveying of rod-shaped articles (20) in the tobacco processing industry, in particular filter rods or filter pieces or cigarettes, the rod-shaped articles (20) using a conveyor drum (10) according to one of Claims 1 until 11 be promoted.

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