JPH0545197Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a manufacturing device for manufacturing cigarette filter plugs using continuous fiber bundles (hereinafter referred to as tow) as raw materials and containing additive particles such as activated carbon particles. The tow, which has been opened in the tow treatment process and has been impregnated with a plasticizer (fiber binder) and has filter additive particles such as particulate activated carbon attached to its upper surface, is then passed through the next filter plug (hereinafter simply referred to as This invention relates to an air jet device for transporting plugs (referred to as plugs) to the hoisting process.

[Conventional technology]

Conventionally, the production of activated carbon-containing plugs using tow as a raw material has been carried out using an apparatus as schematically shown in FIG. 7.

The raw material tow used is usually a tow t which is a bundle of a large number of crimped cellulose acetate fiber filaments.

After this tow t is pulled out from the bale 101, it is expanded by a first banding jet 102 and a second banding jet 103,
Tow processing consists of tension opening processing by the pretension roll 104a and blooming roll 104b, spreading processing by the third banding jet 105, plasticizer impregnation processing by the plasticizer impregnation device 106, tow transfer processing by the delivery roll 107, etc. Step X, activated carbon addition step Y consisting of nipple roll 108, carbon supply device 109, carbon roll 110, guide roll 111, trumpet 112, etc., tongs 113, garniture (winding pipe section) 114, paper wrapping section 115, adhesive application The plug p is manufactured through a plug winding process Z consisting of a rod-shaped tow t consisting of a section 116 and a garniture tape drive section 117, and a rod winding section M and a cutting section N of the rod.

Among these steps, in activated carbon addition step Y,
The upper roll of the pair of nip rolls 108 is driven at the same circumferential speed as the delivery roll 107, and the tow t
However, after the activated carbon is added by the carbon roll 110, there is only a guide mechanism for regulating the tow passage, such as a guide roll 111 and a trumpet 112 for a focusing guide, and the plain filter is Tow transfer device used for manufacturing plugs (see Utility Model Application No. 151794/1983 (see Utility Model Application No. 1983-043395)
A mechanism for actively assisting the transfer of the tow t to the entrance of the garniture 114 is not provided for reasons described below.

[The problem that the idea aims to solve]

Garnicha 114 tow t with activated carbon added
Without an auxiliary device to transfer the plug, the upper limit of the plug hoisting speed is conventionally around 400 m/min.
If the hoisting speed is increased beyond this level, the Gurnia 11 is processed from the tow treatment process X to the activated carbon addition process Y.
4, it becomes impossible to feed a predetermined amount of tow t into the tank, and the variation in the amount of activated carbon added increases due to loosening of the tow t and unstable running.In addition, the plug cut end caves in due to insufficient feeding of the tow t (tow shrinkage). This causes a phenomenon in which a portion of the tow is recessed inward from the cut end of the wrapping paper at the plug cut end) and wrinkled winding, making it practically impossible to increase the winding speed.

When a conventional tow transfer jet using air is used as a tow transfer device to increase the hoisting speed, the air flow of the jet scatters particulate activated carbon attached to the upper surface of the tow t. hand,
The variation in the amount of impregnation in the length direction and radial direction of the filter rod increases, and activated carbon particles adhere to the bonded part of the plug wrapping paper and become trapped after the plug wrapping paper is bonded, resulting in an increase in paper wrapping defects. It was not possible to use a tow transfer jet because it would cause serious problems in terms of plug quality control.

This invention was developed to solve the problem that the plug winding speed cannot be increased any further because a tow transfer jet cannot be used in plug manufacturing equipment that contains additive particles such as activated carbon. It is something.

In the following explanation, we will discuss the case where only activated carbon is added as a filter additive such as activated carbon, but silica gel, zeolite, sepiolite, etc.
Particles of various tobacco filter additives other than activated carbon, such as alumina gel, ion exchange resin, porous synthetic resin, fragrance-containing carrier, catalyst-supported carrier, or carrier supporting special tobacco smoke component removal substances, or When adding a mixture of these additives and activated carbon to tow, the tow is transferred to the garniture inlet using the air jet device of the present invention after the addition process, and the additives are Needless to say, it is possible to manufacture a plug containing .

[Means to solve the problem]

In order to achieve the above object, the present invention is provided in a tobacco filter plug manufacturing device containing additive particles, and starts from an additive particle addition step in which the additive particles are placed on the top surface of a continuous fiber bundle (tow). This is an air jet device for transferring the continuous fiber bundle to the plug winding process, and is composed of a wrap-shaped guide B, an air jet section main body A, and a transfer nozzle C, and the tow transfer path thereof is oriented in the transfer direction. The air jet section main body A is tapered and horizontally formed, and the air jet section main body A transfers a part of the jet flow to the inner cylinder between the downstream end position of the inner cylinder 2 that forms the jet flow and the end of the transfer nozzle C. A suction annular passage for suctioning to the outer periphery of the air is formed by the end of the inner cylinder 2 and the end of the air current changing guide 8. An outer cylinder 1 forming an air circulation chamber 3 is provided, and an acute angle is formed in the suction annular passage as a means for guiding a part of the jet flow through the suction annular passage into the air circulation chamber 3 at the outer periphery of the inner cylinder. An annular passage for blowing out air is provided at the downstream upper part of the outer cylinder 1 so as to intersect with the inner surface of the outer cylinder 1 and the end of the air current changing guide 8, and the air circulation chamber 3 is formed in a substantially airtight shape. The exhaust port 17 for discharging the air sent as part of the jet flow is formed at the bottom at the upstream end of the outer cylinder 1, and the inner cylinder 2, which forms the jet flow, is further provided with a discharge port 17 from its outer circumferential surface. A plurality of air outlets 5 that penetrate the tow transfer path and are inclined in the tow transfer direction are arranged in the tow transfer direction at a lower position of the inner cylinder, and a downstream edge of the air outlet 5 on the outer periphery of the inner cylinder is provided. , an air guide wall surface 6 that guides the air flow to the air outlet 5
, and the two ends of the inner cylinder on the side of the lug-shaped guide are
An air guide groove 12 for forming a jet flow is provided, and an air blowing hole 14 for forming a jet flow, which communicates with the air circulation chamber 3, is formed in the partition wall 13 between the air circulation chamber 3 and the air guide groove 12. It is characterized by the fact that

[Effect]

The tow fed into the trap-shaped guide of the air jet device configured as described above is accelerated in its progress by receiving an air flow ejected from the air outlet from below within the tow transfer path of the air jet unit main body. However, since the air ejected from the air outlet hits the lower surface of the tow and does not directly hit the additive particles attached to the upper surface of the tow, scattering of the additive particles is almost prevented.

In addition, a part of the air flow that has passed through the tow transfer path is reversed in flow direction by the air current guide and the air suction slit and is sucked into the air circulation chamber, so even if there is a slight scattering of additive particles, the air flow will not be rolled up. The air is discharged from the air outlet of the outer cylinder through the air suction slit and the air circulation chamber without being carried into the upper process, and is collected.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic longitudinal cross-sectional view of an air jet device for producing additive-containing tobacco filter plugs (hereinafter simply referred to as the air jet device).

In the same figure, the air jet device includes a central air jet section main body A, and a flap-shaped guide B connected to the main body A on the upstream side of the tow flow (hereinafter simply referred to as the upstream side) as indicated by the arrow F. , a transfer nozzle C connected to the downstream side of the air jet section main body A
It consists of

In the air jet section main body A, a cylindrical part 2a of an inner cylinder 2 is airtightly fitted into the inner peripheral surface of a cylindrical outer cylinder 1, and the outer cylinder 1 and the inner cylinder 2 are arranged on the downstream side of the cylindrical part 2a. An air circulation chamber 3 is formed between the two.

Inside the inner cylinder 2, a gently tapered tow transfer path 4 with a small diameter in the tow traveling direction is provided, and on the outer periphery of the inner cylinder 2, there are air guiding protrusions 5a, 5b, 5c and 5d are provided around the circumference.

The air guiding projections 5a, . . . 5d are formed with air guiding wall surfaces 6a, . In the peripheral wall of the inner cylinder 2, there are a plurality of air outlets 7a, .
d is drilled (see FIG. 2, FIG. 3 which is the GG cross section of FIG. 2, and FIG. 4 which is the HH cross section of FIG. 2).

The reason why there are multiple air outlets 7 instead of one is that by reducing the amount of air blown out from one air outlet 7 and moderately slowing down the air flow velocity, activated carbon attached to the upper surface of the toe can be used. This is to prevent particles from scattering, and to assist the smooth transfer of the tow by blowing air one after another at multiple locations in the direction of transfer of the tow to carry the tow in the air flow.

Each air outlet 7a, . . . , 7d is inclined at a predetermined angle in the tow transfer direction F.

An air current changing guide 8 is provided on the downstream side of the inner cylinder 2.

The air current transformation guide 8 has a cylindrical portion 8a that is airtightly fitted to the outer cylinder 1, and a tapered guide wall 8b that protrudes toward the upstream side is provided on the upstream side surface of the cylindrical portion 8a. , the guide wall 8b and the outer cylinder 1
An air blowing opening 3a serving as an annular passage for blowing out air is formed between the guide wall 8 and the guide wall 8.
An air suction slit 9, which serves as a suction annular passage whose distance becomes narrower toward the air circulation chamber 3, is formed between the air guide protrusion 5d of the inner cylinder 2 and the air guide protrusion 5d.

The air blowing opening 3a blows out compressed air supplied from a downstream air supply port 15, which will be described later, into the air circulation chamber 3, and blows the air that has passed through the tow transfer path 4 into the guide wall 8b by the suction action due to the ejector effect. It is formed in such a structure that the current is changed along the line and guided to the air circulation chamber 3 through the air suction slit 9.

The end of the transfer nozzle C is fitted into the inner surface of the air flow guide 8 and brazed.

At the upstream end of the outer cylinder 1, as shown in the longitudinal sectional view of the main part in FIG. 5, an upstream air supply port 10 having a female thread is provided.
A fitting 11 of the tube communicating with the source of compressed air is threaded.

An air guide groove 12 is provided around the end of the columnar part 2a of the inner cylinder 2 at a position facing the upstream air supply port 10, and a partition wall is formed between the air guide groove 12 and the air circulation chamber 3. 13, a plurality of air blowing holes 14 for forming a jet flow are bored on both sides so as to communicate with the air circulation chamber 3, as shown in FIG. 6, which is a JJ cross-sectional view of FIG. .

The reason why the air blow-off holes 14 are provided as shown in FIG. 6 is to generate air flowing in the downstream direction along the outer peripheral surface of the inner cylinder 2 within the air circulation chamber 3.
This is to make the above-mentioned air flow match the circulating flow that flows upstream along the inner surface of the peripheral wall of the outer cylinder 1 and reverses its flow direction downstream near the partition wall 13.

As shown in FIG. 6, the reason why air blowing holes 14 are not provided in the upper and lower parts of the partition wall 13 is that in the upper part of the air circulation chamber 3, the air flows upstream along the inner surface of the peripheral wall of the outer cylinder 1. This is so as not to impede the flow of exhaust air flowing to the air outlet 17 in the upper part of the air circulation chamber 3.

A downstream air supply port 15 having a female thread is provided at the downstream end of the outer cylinder 1, and a joint 16 of a pipe communicating with a compressed air source is screwed into the downstream air supply port 15.

At the bottom of the outer cylinder 1 near the upstream end of the air circulation chamber 3, there is an air outlet 1 that communicates with the outside from the air circulation chamber 3.
7 will be provided.

The air outlet 17 is provided to control the concentration of activated carbon particles floating in the air within the air circulation chamber 3 to be below a predetermined limit, and to recover and reuse the suspended activated carbon.

As the concentration of suspended activated carbon particles increases, there is a problem in that the possibility of "enmeshment" occurring in the product plug increases.

The position of the air outlet 17 is such that activated carbon particles with a relatively large particle size settle to the lower part of the air circulation chamber 3, and when the air flow reverses the flow direction near the partition wall 13, floating activated carbon particles Taking into consideration that a portion of the tube may settle, it is provided near the partition wall 13 at the bottom of the outer cylinder 1.

Next, the operation of the air jet device constructed as above will be explained.

The compressed air supplied from the upstream air supply port 10 passes through the air guide groove 12, blows out from the air blowout hole 14 into the air circulation chamber 3, flows downstream along the outer circumferential surface of the inner cylinder 2, and its size increases. The portion hits the wall surface 6a of the air guiding wall 5a, blows out from the air outlet 7a into the tow transfer path 4, and carries the tow t transferred from the tangle-shaped guide B into the tow transfer path 4 on the air flow. It flows like this and assists in the transfer of the tow.

On the other hand, the compressed air supplied from the downstream air supply port 15 is blown into the air circulation chamber 3 through the air blowout opening 3a, and due to its ejector effect, the tow transfer path 4
The air that has passed through the guide wall 8 of the air current transformation guide 8
The current changes along the direction b and is sucked into the air circulation chamber 3 through the air suction slit 9.

In the air circulation chamber 3, the air supplied from the downstream air supply port 15 and the air sucked from the tow transfer path 4 via the air suction slit 9 are mixed,
It flows upstream along the inner surface of the outer cylinder 1, reverses the flow direction near the upstream end of the air circulation chamber 3, and flows into the inner cylinder 2 along with a part of the air supplied from the air outlet 14 of the partition wall 13. A circulating flow occurs that flows downstream along the outer surface.

This circulating flow hits the air guide walls 5a to 5d again and is ejected from the air outlets 7a to 7d to assist in the transfer of the tow t.

Air outlet ports 7a to 7d are connected to air guide walls 5a to 5d.
Since it is provided only in the lower half of the circumferential wall of the inner cylinder 2 at the base (minimum diameter part) of the tow, the air flow does not directly hit the activated carbon particles attached to the upper surface of the tow t, and the activated carbon particles Prevent as much as possible from floating and scattering due to air currents.

A part of the circulating air in the lower half of the air circulation chamber 3 is discharged from the air outlet 17 to an external activated carbon recovery tank (not shown) together with floating activated carbon particles.
Floating activated carbon particles are air-separated in the same tank and collected and reused.

As described in detail above, the features of the air jet device of the present invention are as follows: (1) The lower surface of the tow in the tow transfer path is air is blown at a predetermined angle of inclination with respect to the tow transfer direction F.

(2) The transfer air containing floating activated carbon that has passed through the tow transfer path is changed in current by the suction effect of the air supplied from the downstream air supply port and by the air current change guide, and is caused to flow into the air circulation chamber.

(3) Provide an air circulation chamber to receive air for transfer;
The purpose is to provide the functions of blowing out to the tow transfer path, circulating air that has passed through the tow transfer path, and discharging a portion of the circulating air containing floating activated carbon.

[Effect of idea]

Since the present invention is configured as described above, it produces the effects described below.

(1) By using the air jet device of the present invention to assist the tow transfer, the tow impregnated with activated carbon can be stably transferred from the activated carbon addition process Y to the plug hoisting process Z at a plug hoisting speed of 400 m/min or more. This has enabled the filter plug to be supplied with the same amount of water, thereby preventing the cut end of the filter plug from caving in or becoming wrinkled.

(2) Also, prevent the scattering of activated carbon particles as much as possible by avoiding direct application of air flow to the upper surface of the tow to which activated carbon has been impregnated, and suck the air flow containing a small amount of activated carbon particles. Since the activated carbon particles were collected at the same time, it was possible to reduce variations in the amount of activated carbon impregnated and to prevent troubles caused by activated carbon particles getting stuck in the bonded part of the wrapping paper.

(3) At the stage where tow convergence progresses further downstream from the transfer nozzle, the air after passing through the inner cylinder may flow backwards due to the lack of an outlet and obstruct the progress of the tow, or activated carbon particles attached to the tow may This prevents the trouble of scattering.

(4) Since the structure is such that the air collected in the air circulation chamber is supplied again into the tow transfer path and reused for tow transfer, the amount of air used for transfer can be reduced.

Furthermore, activated carbon can be recovered from the air outlet of the air circulation chamber, and the running cost of plug manufacturing can be reduced.

[Brief explanation of the drawing]

Figures 1 to 6 show embodiments of the present invention;
The figure is a schematic vertical cross-sectional view of the air jet device, Figure 2 is a vertical cross-sectional view of the main part on the downstream side of the main body, and Figure 3 is the same as Figure 2.
GG sectional view, Fig. 4 is HH sectional view of Fig. 2, Fig. 5
The figure is a vertical sectional view of the main part on the upstream side of the main body, FIG. 6 is a JJ sectional view of FIG. 5, and FIG. 7 is a schematic explanatory diagram of an apparatus for manufacturing an activated carbon-containing plug. A...Main body, B...Lapped guide, C...Transfer nozzle, 1...Outer cylinder, 2...Inner cylinder, 3...Air circulation chamber, 3a...Air blowing opening, 4...Tow transfer path , 5a-5d... air guide wall, 7a-7d...
Air outlet, 8...Air current transformation guide, 9...Air suction slit, 10...Upstream air supply port, 14...
...Air blowout hole, 15...Downstream air supply port.

Claims (1)

[Scope of utility model registration request] Provided in a tobacco filter plug manufacturing apparatus containing additive particles, for transferring the continuous fiber bundle from an additive particle addition step in which the additive particles are placed on the top surface of a continuous fiber bundle (tow) to a plug winding step. This air jet device is composed of a wrap-shaped guide B, an air jet section main body A, and a transfer nozzle C, and the tow transfer path thereof is tapered toward the transfer direction and formed horizontally. The main body A has a suction annular passage for sucking a part of the jet flow to the outer periphery of the inner cylinder between the downstream end position of the inner cylinder 2 that forms the jet flow and the end of the transfer nozzle C. It is constituted by an end of the inner cylinder 2 and an end of the air current transformation guide 8, and an outer cylinder 1 is provided outside the inner cylinder 2 and the air current transformation guide 8 to form a substantially airtight air circulation chamber 3. , as a means for guiding a part of the jet stream through the suction annular passage to the air circulation chamber 3 on the outer periphery of the inner cylinder, at the downstream upper part of the outer cylinder 1 so as to intersect with the suction annular passage at an acute angle. An annular passage for blowing out the provided air is formed by the inner surface of the outer cylinder 1 and the end of the air current changing guide 8, and the air sent as part of the jet flow is formed in the substantially sealed air circulation chamber 3. Air outlet 17 for discharging
is formed in the bottom part at the upstream end of the outer cylinder 1, and furthermore, the inner cylinder 2 that forms the jet flow has an air outlet 7 that penetrates from the outer peripheral surface of the inner cylinder 2 into the tow transfer path and is inclined in the tow transfer direction. A plurality of them are arranged in the tow transfer direction at a lower position of the inner cylinder, and an air guiding wall surface 6 that guides the air flow to the air outlet 7 is formed at the downstream edge of the air outlet 7 on the outer periphery of the inner cylinder, An air guide groove 12 for forming a jet flow is provided at the end of the inner cylinder 2 on the side of the flap-like guide.
A filter plug characterized in that a partition wall 13 between the air circulation chamber 3 and the air guide groove 12 is provided with an air blowing hole 14 for forming a jet flow that communicates with the air circulation chamber 3. Air jet device in manufacturing equipment.