CN1038221C

CN1038221C - Improvements relating to the extrusion of tobacco containing materials

Info

Publication number: CN1038221C
Application number: CN93107068A
Authority: CN
Inventors: P·M·格林
Original assignee: British American Tobacco Co Ltd
Current assignee: British American Tobacco Investments Ltd
Priority date: 1992-05-15
Filing date: 1993-05-15
Publication date: 1998-05-06
Anticipated expiration: 2013-05-15
Also published as: GB2266834B; GB9210469D0; HK105096A; GB2266834A; IN181208B; GB9309539D0; CN1082849A

Abstract

A method of extruding a tobacco containing web, the web being formed by a tobacco containing material extruded through a die provided with a linear slit form outlet orifice, the die is provided with adjustable portions, each die portion being adjustable in position in a direction transverse of the outlet orifice of the die, the die is thus adjustable in situ, whereby when a particle in the tobacco containing material, which particle is too large to pass through the outlet orifice, becomes lodged in the region of the outlet orifice, a die portion can be adjusted in position to widen the die to permit passage of the particle through the outlet orifice.

Description

The sheet extrusion die of extruding tobacco containing materials

The present invention relates to the extruding of tobacco containing materials, specifically, the extruding that relates to tobacco containing materials is to provide laminar extrudate and to provide in order to produce the mould that is used for extruder of this thin slice.

Thin slice by a continuous tobacco containing materials of an extruder mold extruding is disclosed in the specification of BP GB2201080.The tobacco of using is advisable with acinous for this purpose, and for example, it can be prepared by grinding the waste tobacco material.

The GB2201080 patent is described and is illustrated an extruder mold, and the outlet nib of this mould is the slit of a loop configuration.From the extrudate that extrusion die flows out, be the section of approximate tubulose at first, the thin slice shape that then generate is flat.In order to make tobacco containing materials stream, adopted annular mould outlet nib continuously equably by nib.In continuous experiment work, find well-designed extruding flow channel, consider the rheological properties of this kind tobacco containing materials, using the mould of the outlet nib of a slit-shaped that has a straight line is can be gratifying.When using this mould, find, can stop up the outlet nib zone of mould frequently just like cabo particle, and on thin slice shape extrudate, produce the groove of weakening property, or even geosutures.In order to correct this defective mode, the extruder and mould pulled down of must stopping is removed overdimensioned particle.

Utilize the present invention, when the above-mentioned reconstituted tobacoo of extruding, remove the oversize grain that is blocked in the mould, can need not to stop extrusion process.

The present invention conceives a kind of technical scheme, it utilizes extruder to push by a mould tobacco containing materials, this mould has thin slice shaping outlet nib, and the mould part of the longer sides of outlet nib can regulating along the mould outlet nib in a lateral direction on the position.When too big through the particle in this material of this outlet nib, and when stopping up this outlet nib zone, said mould partly can be regulated on the position, and mould is partly widened at above-mentioned mould, therefore, allows this particle to pass through from this outlet nib.

By behind the mould, this mould part of mould can be adjusted to its initial position again at particle.The preferred a kind of mould that uses, be the sort of wherein on the position adjustable mould partly be in a plurality of moulds part of this mould one, this mould partly is arranged on the long limit of mould outlet nib, and each mould part all can export regulating in a lateral direction of nib along mould on the position.All above-mentioned mould parts all are arranged on the same longer sides of this mould outlet nib.

Therefore, according to above-mentioned design, purpose of the present invention is to provide the extruding tobacco containing materials sheet extrusion die.

Extrusion die provided by the present invention, this mould comprise a top and a lower part, and these two parts removably link together by a die arrangement device, and when unclamping this positioner, one of this top and this lower part can be movable; This mould also comprises a material flow channel, this material flow channel extends to outlet nib straight line, narrow slit shape by the ingate of this mould in this mould, this die arrangement device and can regulate the position of a part or a plurality of parts of this mould, pass through this outlet nib with the bulky grain that allows this tobacco containing materials, thereby keep the continuity of the thin slice of this extruding.

The spendable mould for the object of the invention is according to US Patent specification: US3940221 in general; US3985845; US4003689; US4055398; US4125350; Disclosed mould among US4252519 and the US4281980.

In order clearly to understand and the present invention easy to implement, with reference to following sketch, illustrate, wherein:

Fig. 1 is the cutaway view of Fig. 3 III-III line place extrusion die;

Fig. 2 is the front view (by direction shown in the arrow A) of Fig. 1;

Fig. 3 is the view of the mould that the arrow B direction is observed among Fig. 1;

When enforcement was of the present invention, the extrusion die 1 among Fig. 1 utilized piecing devices 7 to be contained in the port of export of extruder barrel, and the section that it should be noted that Fig. 1 is the vertical plane that contains the extruder barrel axis.

The main body of the steel of mould 1 comprises top 2 and lower part 3, and two parts removably link together by the bolt (not shown).Material circulation passage 4 in the mould 15 extends to narrow slit shape wide, straight line outlet nib 6 from the ingate, and this ingate 5 is coaxial with extruder barrel.

For the purpose of expression clearly, being limited to shown in figure is right after that gap between the flat surfaces of passage 4 of outlet nib 6 upstreams draws in the mode of exaggeration.

Steel side plate

8 and 9 removably is loaded on mould main body and the metallic gasket (not shown), this pad is positioned between said

side plate

8,9 and the mould main body, two sides with the flow channel 4 of guaranteeing to export nib 6 zones are sealed, and above-mentioned zone just passage 4 extends to the zone of die body major side edges.

Mould 1 top 2 has one and extends to the deep trouth 10 of another side on one side from it, as shown in Figure 1, groove 10 is set means, the metal thickness between the lower surface on mould 1 bottom and top 2 is relatively said fewer, and this regional metal forms a neck 11.Therefore, the part on the top 2 on neck 11 right sides is called nose 14.

By a not shown device that goes out, be fixed on mould 1 top 2 be a girder steel 12, this beam partly extends across groove 10.Nine bolts 13 pass from this beam 12, and with beam 12 on screwed hole engagement.Best, each bolt 13 tool head is hexagonal recess, therefore can use the die nut swivel bolt.Each bolt 13 can make away from the terminal part of head one side surface of groove 10 is applied active force after being rotated, and central authorities as shown in Figure 1 regulate bolt 13.Further rotate each bolt 13 in the same way, it is crooked that neck 11 is produced, and nose 14 offsets downward around neck, can reduce to export the slit of nib like this.

In extrusion operation, tobacco containing materials is forced to apply a suitable active force by utilizing adjusting bolt 13 at nose 14 by passage 4 from above-mentioned extruder barrel continuously, but so that will export the thin slice shape extrudate that production institute required thickness is set in the slit of nib for.

This nib slit can for example be 700 μ m.

Reference number 15 (Fig. 1) has indicated an overdimensioned particle, and as offal, it is brought to the position that is indicated with tobacco containing materials stream.Because oversize grain 15 can not pass through outlet nib 6, thereby is blocked in this marker location.Tobacco containing materials is divided into two limits by particle 15, therefore forms a continuous defect line on the extrudate film.

The method according to this invention when having formed the defect line, one of the most close defect line is regulated bolt or a plurality of bolt 13 is unscrewed, to loosen the active force that acts on facing on the nose 14 of defect line.Make under the internal pressure effect of the object that nose 14 flows in mould upwards curved like this.In this way, therefore also be the gap width expansion that will export nib 6 facing to plugging particle 15 location facing to the defect line, allow particle 15 to pass through outlet nib 6 like this with the logistics of tobacco containing materials.When particle by behind the mould, the mould nose that pressure has been loosened can be transferred to the home position again by regulating an identical bolt or a plurality of bolt 13.The oversize grain of removing in the mould need not to stop extrusion process or dismounting mould.

Claims

1. one kind is used in tobacco containing materials extrusion process with the extrusion die in the extruder that the tobacco containing materials thin slice is provided, it is characterized in that, described mould comprises a top and a lower part, described two parts removably link together by a die arrangement device, when unclamping described positioner, one of described top and described lower part can be movable; Described mould also comprises a material flow channel, described material flow channel extends to outlet nib straight line, narrow slit shape by the ingate of described mould in described mould, described die arrangement device can be regulated the position of a part or a plurality of parts of described mould, with the bulky grain that allows described tobacco containing materials by described outlet nib, thereby keep the continuity of the thin slice of described extruding.

2. extrusion die according to claim 1 is characterized in that, one side the top of described extrusion die has a deep trouth that extends to another side from top.

3. extrusion die according to claim 2 is characterized in that, described deep trouth has one to extend across at least in part in beam wherein.

4. extrusion die according to claim 3 is characterized in that, described positioner is a plurality of adjusting bolts by described beam, and with described beam on the hole in be threadedly engaged with.

5. extrusion die according to claim 4 is characterized in that, described each adjusting bolt has a head device that matches with spanner, in order to independently to rotate described adjusting bolt respectively.