CN102333460B - A unit for feeding a flow of tobacco particles in a cigarette maker - Google Patents

Abstract

A flow of shredded tobacco particles is fed through a cigarette maker by a unit that comprises an ascending chimney (15) enclosed at the top end by at least one aspirating conveyor belt (25), on which the flow (4) of particles is formed into a stream (6) of tobacco filler; the ascending chimney (15) is delimited laterally by two side walls (22, 23) creating a restriction (29) at an intermediate position, dividing the chimney into a lower portion (27) and an upper portion (28). The lower portion (27) of the chimney (15) incorporates a pneumatic blending system (31) acting on the flow (4) of tobacco in such a way as to ensure a uniform distribution of the shredded particles.

Description

For being fed to the feed unit of flow of tobacco particles in cigarette manufacturing machine

Technical field

The present invention relates to the feed unit for being fed to flow of tobacco particles in cigarette manufacturing machine.

Background technology

Cigarette manufacturing machine generally includes the hopper comprising a large amount of pipe tobacco.

Tobacco is delivered to the top inlet end of descending conduit or skewed slot from hopper by comb unit, then be received in the bottom end of conduit by pneumatic and/or mechanical transmission device, such as, continuous print flow of tobacco particles can be guided to by the up conduit being arranged to two vertical sidewalls demarcation substantially parallel to each other or chimney.

In single track cigarette manufacturing machine, the top of up chimney by air-breathing conveyer belt close, this conveyer belt by ventilative fabric formed and advance along the direction extending substantially transversely to the flow of tobacco direction rising through chimney.

Press from both sides attached pipe tobacco particle in the ascending air produced in the base portion of up chimney to be forced to upwards by identical chimney, and finally drawn by absorbing gas belt, and these pipe tobacco particles are little by little collected on this absorbing gas belt to form pantostrat or continuous thread.

Outside up chimney, tobacco thread to be centered around in paper wood material strip and to be shaped as continuous cigarette rods, and by rotating cutter sweep, this continuous cigarette rods can be divided into single cigarette sticks subsequently.

In the situation of double track cigarette manufacturing machine, the top of chimney has the resolution element of ovoid in cross-section, and this resolution element is placed to and flow of tobacco particles is divided into two parts, and these two parts little by little form corresponding thread on two air-breathing conveyer belts.

In the mode identical with the machine of above-mentioned monorail type, these threads are shaped as corresponding continuous cigarette rods, and are divided into single cigarette sticks by identical cutter sweep.

Therefore, tobacco particle flows through the unit be made up of descending conduit and up chimney and is fed through machine, and descending conduit and up chimney are connected to each other by above-mentioned conveying device.

Owing to having the uneven distribution of the tobacco particle of different physical characteristic (weight and size), thus flow of tobacco particles is always completely not uniform when entering up chimney.

In single track machine, this can be formed has the uneven degree of depth and the thread of weight, and hereafter will carry out in the double track machine of reference definitely, and the degree of depth of two threads and weight can be different from each other.

Due to this shortcoming, this becomes cannot produce cigarette rod equably, and extend ground cannot the cigarette that matches with tighter tolerances specified by manufacturer of output.

Find, especially when high service speed (more than 20,000 cigarette per minute) of Modern cigarette industry maker, the uneven distribution of tobacco particle is attributable to the reduction gradually of the air velocity rising through up chimney.

In fact, be enough to folder in the air velocity of chimney bottom and echo guiding flow of tobacco, and at top, air velocity is specifically because the cross section of chimney is reducing close to broadening during absorbing gas belt.

This shortcoming especially has impact to the less tobacco particle with less kinetic energy, and cannot overcome simply by the initial velocity increasing air-flow, but the suction such as by increasing air-breathing conveyer belt realizes.

In fact, the speed of ascending air cannot increase to and exceed some limit value, otherwise tobacco thread can be compact excessively and be pressed against conveyer belt devastatingly, and tobacco particle is crushed.

Summary of the invention

The object of this invention is to provide a kind of feed unit for being fed to continuous tobacco grain flow, and this feed unit such as can not have above-mentioned shortcoming.

Be a kind of feed unit for being fed to continuous tobacco grain flow according to the described object that the present invention realizes, the feature of this feed unit is documented in one or more claims.

Accompanying drawing explanation

Now describe the present invention in detail by way of example by accompanying drawing, in the drawings:

Fig. 1 schematically and the part of the cigarette manufacturing machine comprising feed unit of the present invention is shown with sectional view, and for the sake of clarity excises some parts;

Fig. 2 schematically illustrates machine shown in Fig. 1 with front view;

Fig. 3 illustrates the enlarged detail of Fig. 1;

Fig. 4 illustrates the enlarged detail of Fig. 3;

The details of Fig. 5 Fig. 1 shown in the second possibility embodiment;

The details of Fig. 6 Fig. 1 shown in the 3rd possibility embodiment.

Detailed description of the invention

See Fig. 1 and Fig. 2, Reference numeral 1 indicates the machine always comprising double track cigarette manufacturing machine.

Or rather, machine 1 comprises Part I 2 and Part II or has the unit 5 of conventional example, this Part I is used as feed unit, and a large amount of pipe tobaccos remained in storage hopper 3 are discharged by this Part I 2 and transmitted as continuous tobacco grain flow 4, and this flow of tobacco particles 4 is formed as two continuous threads 6 and 7 by this Part II.

See Fig. 3, machine 1 also comprises the opium pipe unit being schematically shown as the square indicated by Reference numeral 8, and two tobacco threads 6 and 7 are two continuous cigarette rods 9 by this opium pipe unit forming.

By make schematically to be shown as by Reference numeral 10 indicate square cutter sweep rotate and continuous cigarette rods 9 be divided into single cigarette sticks 11.

The feed unit 2 transmitting continuous tobacco grain flow 4 comprises downstream pip or skewed slot 12, the top of this downstream pip or skewed slot is connected to hopper 3 by the comb unit 13 being equipped with carding roller 14, and this carding roller can rotate around the horizontal axis 14a perpendicular to view plane shown in Fig. 1.

Feed unit 2 also comprises riser duct or chimney 15, this riser duct or chimney are aligned in and are designated as in the basic vertical longitudinal axis of 15a, and the bottom inlet end 16 of this riser duct or chimney is connected by the port of export 17 of conveying device 18 with descending conduit 12, and conveying device 18 comprises the supply unit 19 transmitting flow of tobacco particles 4.

The axis being designated as 12a of descending conduit tilts relative to vertical line, becomes the acute angle of preset width with the axis 15a of the perpendicular with descending chimney 15.

Supply unit 19 comprises the spike(d) roller being designated as 20 and 21 for a pair, and this is arranged to make axis parallel with the axis 14a of carding roller 14 to spike(d) roller, as shown in Figure 1 this to spike(d) roller substantially tangent to each other rotate and rotate counterclockwise.

A roller 20 is used as conveyer, the tobacco declined from comb unit 13 in the pickup of the port of export 17 place of descending conduit 12 by this conveyer, and another roller 21 is used as propeller, and tobacco passes through this propeller directly in upper input rising chimney 15.

Riser duct 15 delimited by two sidewalls 22 and 23, and at top exit end place by a pair air-breathing conveyer belt 24 and 25 parallel to each other close, aforementioned tobaccos thread 6 and 7 at this to air-breathing conveyer belt being assembled and transmitting.

Two the air-breathing conveyer belts 24 and 25 of a part forming second unit 5 are set to along perpendicular to view plane shown in Fig. 1, also move perpendicular to the direction of the axis 15a of chimney 15 thus, and preferably formed by breathable fabric material.

Unit 5 also comprises the resolution element 26 of traditional type, and this resolution element is placed in the inside of between conveyer belt 24 and 25 and direction towards rising chimney 15, and has avette profile and comprise the rod that its axis being parallel extends in two conveyer belts 24 and 25.

Sidewall 22 and 23 rises from base portion convergence towards top, by covering the distance of the first bottom 27 of chimney 15, after this divergently by the distance on covering second top 28, to produce the restriction 29 overlapped with mid portion.

This machine 1 also comprises pneumatic means 30, and this pneumatic means 30 is positioned at import 16 place of chimney 15, and air-flow by this pneumatic means by upwards and guide towards conveyer belt 24 and 25.

The pneumatic mixing arrangement 31 be associated with the bottom of chimney 15 also forms a part for this machine, this pneumatic mixing arrangement 31 comprises conduit 32, and conduit 32 is connected to compressed air source 33 and is communicated with chimney 15 inside by the opening 34 in wall 22 and 23, send flow of tobacco particles 4 with the direction that edge extends substantially transversely to chimney axis 15a.

This machine also comprises Pneumatic acceleration device 35, this Pneumatic acceleration device is connected to overlapping with restriction 29 of chimney or the immediately follows part of (feed direction relative to stream 4) above this restriction 29, and this Pneumatic acceleration device comprises conduit 36, this conduit 36 is also connected to compressed air source 33 and is communicated with the inside of chimney 15 via multiple hole 37, and multiple hole 37 has the tilt axis through sidewall 22 and 23.

Therefore, the air-flow produced by Pneumatic acceleration device 35 can have the component towards absorbing gas belt 24 and 25 orientation, widens gradually and the deceleration caused to resist flow of tobacco particles 4 in combination due to portion's section of chimney 15 with restriction 29.

In fact, this makes the flow of tobacco particles 4 rising through chimney 15 can keep its homogeneous component (namely making the particle with different physical characteristic have to be uniformly distributed), until form two threads 6 and 7 on absorbing gas belt 24 and 25.

Reference numeral 38 represents the opening that two sidewalls 22 being arranged in chimney 15 near top are connected with 23 and with conduit 39, and folder discharges eventually through this top with the air of flow of tobacco particles 4.

As shown in Figure 4, feed unit 40 for being fed to flow of tobacco particles 4 is with aforementioned feed unit 2 difference: descending conduit 12 is vertical substantially and conveying device 18 comprises the supply unit 41 similar with aforementioned supply unit 19 and becomes endless-belt conveyor 42, this supply unit 41 is positioned at the port of export 17 place of conduit 12, forms endless-belt conveyor 42 and has the top branch 43 that is suspended between two pulleys 44 and supply unit 41 is connected with the entrance point 16 of up chimney 15.

Supply unit 41 comprises two spike(d) rollers operated in combination with each other, and tobacco is delivered to the top branch 43 of belt conveyer 42 from conduit 12 by these two spike(d) rollers, flow of tobacco particles 4 is carried by the entrance point 16 of identical conveyer towards up chimney 15 by this.

Finally, feed unit 47 as shown in Figure 5 for being fed to flow of tobacco particles 4 is with feed unit 2 difference shown in Fig. 1: descending conduit 12 is connected to the entrance point 16 of up chimney 15 by arcwall 48, and this arcwall is used as the guiding piece of flow of tobacco particles 4.

In this embodiment, by providing conveying device 18 with the arcuate guide wall 48 of pneumatic means 49 binding operation, and this pneumatic means 49 comprises compressed air source 50, and this compressed air source produces the air-flow guided towards the opening 51 being arranged in arcwall 48, and tobacco particle flows through this air-flow along this wall transmission.

Be understood that, the double track cigarette manufacturing machine being not equipped with the single up chimney 15 on top with resolution element 26 can be equipped with two up chimneys, and these two up chimneys are substantially parallel to each other and tobacco is fed to respectively corresponding up conveyer belt.

In this case, arcwall 48 can be divided into Liang Ge branch, and flow of tobacco particles 4 is fed to corresponding chimney by each branch.

Claims (5)

1. one kind for being fed to the feed unit of flow of tobacco particles in cigarette manufacturing machine, described feed unit at least comprises: up chimney (15), described up chimney in the top by least one air-breathing conveyer belt (25) close, and described flow of tobacco particles (4) forms thread (6) on described air-breathing conveyer belt (25), descending conduit (12), tobacco particle gathers along described descending conduit (12) and is transmitted, and conveying device (18), described conveying device (18) is placed between described descending conduit (12) and described up chimney (15), described up chimney (15) is by two sidewalls (22, 23) laterally delimit, described two sidewalls (22, 23) restriction (29) is produced in middle position, and this chimney is divided into bottom (27) and top (28) by described restriction (29), wherein, feed unit (2) comprises pneumatic mixing arrangement (31), described pneumatic mixing arrangement is associated with the bottom (27) of described up chimney (15) and acts on described flow of tobacco particles (4), described conveying device (18) comprises the supply unit (19) being equipped with roller, and described descending conduit (12) is directly connected in described up chimney (15) by described supply unit (19), described supply unit (19) comprises transfer roller (20) and advances roller (21), from described descending conduit (12), tobacco is picked up by described transfer roller (20), and described propelling roller (21) and described transfer roller (20) operate in combination, and described flow of tobacco particles (4) is directly knocked down along described up chimney (15) by described propelling roller (21), it is characterized in that, described pneumatic mixing arrangement (31) is associated with the bottom of described chimney (15) and comprises conduit (32), and described conduit (32) is connected to compressed air source (33) and by sidewall (22, 23) opening (34) in and with chimney (15) inside be communicated with, to send flow of tobacco particles (4) along the direction extending substantially transversely to chimney axis (15a).

2. feed unit as claimed in claim 1, it is characterized in that, described feed unit comprises the Pneumatic acceleration device (35) be associated with the described top (28) of described up chimney, and described Pneumatic acceleration device is positioned near described restriction (29) or overlaps with described restriction (29) and act on described flow of tobacco particles.

3. feed unit as claimed in claim 2, is characterized in that, described Pneumatic acceleration device (35) is connected to overlapping with restriction (29) of chimney or immediately follows above described restriction (29); Described Pneumatic acceleration device (35) comprises conduit (36), described conduit (36) is also connected to compressed air source (33) and is communicated with via multiple hole (37) inside with described chimney (15), and multiple hole (37) have the tilt axis through described sidewall (22,23); The air-flow produced by described Pneumatic acceleration device (35) can have towards the directed component of absorbing gas belt (25), widens gradually and the deceleration that causes to resist flow of tobacco particles (4) in combination with described restriction (29) due to portion's section of described chimney (15).

4. feed unit as claimed in claim 1, it is characterized in that, described cigarette manufacturing machine (1) is single track machine.

5. feed unit as claimed in claim 1, it is characterized in that, described cigarette manufacturing machine (1) is double track machine.