JP2000253864A - Compression molding apparatus for cigarette production machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression molding apparatus designed to prevent a superheating of a mold used in the compression molding of cut tobacco layer prior to molding tobacco rods. SOLUTION: This compression molding apparatus for a cigarette production machine is equipped with a number of heat-releasing fins 56 provided inside the end portion downstream of a tongue 20 as a mold and constituting an heat- releasing area 54, an air cooler 50 blowing cooling air toward these fins 54, and an ejecting heat 36 to which cooling air from the air cooler 50 is guided and which ejects it toward the heat-radiating area 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression molding apparatus for compression-molding a cut tobacco layer in a cigarette manufacturing machine prior to molding of a tobacco rod.

[0002]

2. Related Background Art A compression molding apparatus of this kind is disclosed, for example, in Japanese Patent Publication No. 59-37069. This known device comprises a mold called a tongue, called a compression tongue, whose lower surface cooperates with a molding bed for guiding the transport of the wrapping paper and serves as a molding surface for compression molding the cut tobacco layer. Is formed. That is, a compression molding passage of the cut tobacco layer is formed between the tongue and the molding bed.

Further, on the molding surface of the tongue, irregularities are formed to reduce the contact area with the shredded tobacco layer. These irregularities reduce the passage resistance of the shredded tobacco layer and help prevent shredding of the shredded tobacco.

[0004]

In order to improve the productivity of cigarettes, it is necessary to increase the forming speed of the tobacco rod, that is, the speed of conveying the cut tobacco layer conveyed together with the wrapping paper. However, the higher the transport speed of the cut tobacco layer, the higher the passage resistance of the cut tobacco layer due to the tongs. Therefore, the tongs are heated by frictional heat and become high temperature. In particular, at the outlet of the compression molding passage, since the squeezing ratio of the cut tobacco layer is maximum, the downstream end portion of the tongs is most heated in the transport direction.

[0005] Such overheating of the tongs not only degrades the taste of the minced tobacco itself, but also increases the pungent odor and reduces the added flavor and sauce. Therefore,
Such inconvenience is a major constraint in improving cigarette productivity. The present invention has been made on the basis of the above-described circumstances, and the object thereof is to improve the cigarette productivity without significantly affecting the taste of minced tobacco and the added flavor and sauce. An object of the present invention is to provide a compression molding device for a manufacturing machine.

[0006]

The compression molding apparatus of the present invention is provided with air cooling means for air cooling the mold. Air cooling means air cools the mold and prevents overheating. Preferably, the air cooling means is provided in at least a downstream end portion of the mold, increases a heat radiation area of the downstream end portion and allows passage of cooling air, and guides the cooling air to the heat radiation region. And a cooling air supply path. In this case, when the cooling air passes through the heat radiation region of the mold, it takes away the heat of the mold and cools the mold.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a cigarette making machine, a so-called hoisting machine, has an endless tobacco band 2, and the tobacco band 2 is looped between front and rear band rollers 4 (only one is shown). And travels in the direction of the arrow in the figure. The tobacco band 2 is a suction belt, and on the lower surface thereof, the cut tobacco rising in the chimney (not shown) together with the air flow is adsorbed in layers to form a cut tobacco layer L. The cut tobacco layer L thus formed is transported in the direction of the arrow along with the tobacco band 2 as the tobacco band 2 runs.

A shaping bed 6 is disposed below the band roller 4 shown in the drawing, and the shaping bed 6 is vertically opposed to a part of the tobacco band 2 at an upstream end thereof, and the chopped tobacco layer L Extend horizontally in the transport direction. A guide groove (not shown) is formed on the upper surface of the forming bed 6. The guide groove extends in the conveying direction of the cut tobacco layer L. The groove width gradually decreases from the illustrated band roller 4 side, while the depth gradually increases. The cross section has a gutter shape that finally converges into a semicircle.

A pair of tape rollers 8a and 8b are rotatably arranged at both ends of the forming bed 6, and an endless garniture tape 10 extends horizontally between the tape rollers 8. The garniture tape 10 passes through this groove while being guided by the guide groove of the molding bed 6. The garniture tape 10 is guided to a driving drum (not shown) via a plurality of guide rollers 12 (only one is shown in FIG. 1), and is partially wound around the outer periphery of the driving drum. Therefore, with the rotation of the drive drum, the garniture tape 10 travels in the transport direction of the cut tobacco layer L, and the traveling speed is the same as the transport speed.

[0010] Paper rollers 14 and 16 are rotatably arranged vertically above and below the tape roller 8a, and these paper rollers 14 and 16 guide the running of the wrapping paper P. The wrapping paper P guided by the paper rollers 14 and 16 is guided onto the garniture tape 10, and is superposed from above. The wrapping paper P is fed out from a wrapping paper roll (not shown) and travels together with the garniture tape 10.

Immediately above the forming bed 6, a tongue 20 provided with a shoe 18 as a forming die, a winding section 24 provided with a gluing device 22, and a dryer 26 are sequentially arranged from the band roller 4 side shown in the figure. I have. As viewed in the transport direction of the cut tobacco layer L, the upstream edge of the shoe 18 functions as a scraper edge.
By approaching tobacco band 2 above, tobacco band 4
The peeled tobacco layer L is exfoliated.

The tongue 20 is connected to the downstream end of the shoe 18, and forms a compression molding passage for the cut tobacco layer L in cooperation with the guide groove of the molding bed 6. More specifically, the lower surface of the tongue 20 has a groove shape in which the guide groove of the above-described forming bed 6 faces downward, and the radius of curvature of the groove in the cross section is from the upstream edge to the downstream edge of the tongue 20. And the groove shape at the downstream edge becomes substantially semicircular.

The lower surface of the shoe 18 and the lower surface of the tongue 20 are smoothly connected, and the shoe 18 is also
In cooperation with the above to form the upstream portion of the compression molding passage described above. In this case, the lower surface of the shoe 18 also has a groove shape that smoothly connects from the linear upstream edge to the upstream edge of the tongue 20. Further, in the above description, the shoe 18 and the tongue 20 are provided separately, but they may be formed integrally. Also, a plurality of vertical grooves (not shown) may be formed on the lower surfaces of the shoe 18 and the tongue 20 along the axial direction of the compression molding passage.

The cut tobacco layer L on the tobacco band 2 is separated from the tobacco band 2 at the upstream edge of the shoe 18 functioning as a scraper edge, and is supplied onto the wrapping paper P. Thereafter, the cut tobacco layer L is guided into the compression molding path together with the wrapping paper P which is run by the garniture tape 10,
It passes through this compression molding passage. During this passage process, the wrapping paper P is gradually bent into a substantially U-shape according to the groove shape of the guide groove in the forming bed 6 together with the garniture tape 10, while the cut tobacco layer L has a semicircular cross section according to the groove shape of the lower surface of the tongue 20. It is gradually compressed from above so that As a result, the cut tobacco layer L is squeezed into a rod having a circular cross section in the compression molding passage, and
That is, it is fed into the winding section 24 from the downstream edge of the tongue 20. The shoe 18 and the tongue 20
When the above-mentioned vertical grooves are formed on the lower surface of the tongue, the contact area between these lower surfaces and the cut tobacco layer L (cut tobacco rod) is reduced, and the passage resistance in the compression molding passage can be reduced.

The wrapping section 24 comprises a wrapping type for wrapping paper P, called a so-called short holder and long holder. One side edge portion of the U-shaped wrapping paper P that has passed along with the cut tobacco bar from the tongs 20 is bent into an arc shape by a short holder, and first covers the upper half of the cut tobacco bar. At the same time, the glue 22
Glue is applied to the other side edge of the letter-shaped paper P. Thereafter, the long holder bends the other side edge portion of the wrapping paper P into an arc shape,
It is superimposed on one side edge of the wrapping paper P on the cut tobacco rod. Thereby, both side edges of the wrapping paper P are adhered to each other,
The tobacco rod R is continuously delivered from the winding section 24.

When the tobacco rod R passes through the dryer 26, the glue of the seam portion of the wrapper is dried, and then cut into cigarette rods of a predetermined length by a cutting device (not shown). 2 and 3 show the periphery of the tongue 20 in more detail. The tongue 20 is fixed to a plate-shaped fixing member 28, and the fixing member 28 is attached to a frame side member 30 of the hoist. As shown in FIG. 3, a cover plate 32 is arranged on the front side of the hoist, that is, on the operator side for the hoist, and the cover plate 32 covers the shoes 18 and the tongs 20. In addition,
The cover plate 32 is detachably connected to the fixing member 28 via a spacer 34 protruding from the fixing member 28, and the spacer 34 is connected to the fixing member 28 and the cover plate 3.
2 and a predetermined interval is secured. In FIG. 2,
The wrapping paper P and the garniture tape 10 have been omitted, and the forming bed 6 has also been further omitted in the case of FIG.

A discharge head 36 made of synthetic resin is disposed between the tongue 20 and the cover plate 32, and the discharge head 36 is air-tightly fixed to one surface of the tongue 20. A discharge chamber 38 is formed in the discharge head 36, and the discharge chamber 38 is connected to a connection pipe 42 via a joint 40. The connecting pipe 42 extends upward and is connected to a connecting hose 46 via a joint 44.
Further, the connection hose 46 is connected to an air cooler 50 via a joint 48. The outsides of the connection pipe 42 and the connection hose 46 are respectively covered with a heat insulating tube 52.

The air cooler 50 cools the air to a predetermined temperature below the freezing point (for example, −10 ° C.), weighs the cooling air,
Discharge head 3 through connection tube 46 and connection tube 42
6 can be supplied. That is, the discharge head 36 from the air cooler 50 forms a supply path of the cooling air. On the other hand, the discharge chamber 38 of the discharge head 36 opens on the side surface of the tongue 20 and communicates with a heat radiation area 54 formed in the tongue 20. As shown in FIG. 4 and FIG.
4 is obtained by forming a number of slits in the tongue 20. Each slit extends vertically in the tongue 20 over a predetermined length, and is disposed at a predetermined interval in the axial direction of the compression molding passage. That is, the slit rows are distributed over a region of a predetermined length from the vicinity of the downstream end of the tongue 20 to the upstream end. In the embodiment shown, the heat dissipation area 54 extends from the downstream end of the tongue 20 beyond its central part, as viewed in the axial direction of the compression molding passage.

As is apparent from FIG. 5, the slits forming the heat radiation area 54 do not pass through the tongue 20 in the width direction of the tongue 20 but have a predetermined angle with respect to the width direction of the tongue 20. It is inclined. In the case of the illustrated embodiment, the discharge chamber 38 of the discharge head 38
The cooling air supplied to the rectifier is rectified by the slits of the heat radiation area 54 and guided toward the inlet side of the compression molding passage.

More specifically, a recess is formed on the other surface of the tongue 20, and the recess forms a discharge space 58 between the fixing member 28 and the cooling air passing through the heat radiation area 54. I do. Here, the discharge passage 58 extends from the upstream end to the downstream end of the tongue 20 and communicates with the discharge passage 60 in the fixing member 28. The discharge passage 60 communicates with the discharge space 58 at the upstream end of the tongue 20,
It is open to the atmosphere on the back side of the hoist.

Further, as is apparent from FIG.
Each of the slits 4 is obtained by wire electric discharge machining, and these slits form a large number of radiating fins 56 in the tongue 20. During operation of the hoist, the cooling air supplied from the air cooler 50 to the discharge head 36, that is, the discharge chamber 38, is discharged to the discharge space 58 through each slit of the heat radiation area 54, and The cooling air is discharged to the atmosphere through the discharge passage 60. That is, the cooling air in the discharge space 58 is smoothly discharged to the atmosphere through the discharge passage 60, and the cooling air does not stay in the discharge space 58. As a result, the cooling air can flow smoothly from the discharge chamber 38 through the heat radiation area 54.

The cooling air passing through the heat radiating region 54 removes heat from the outer surface of each of the heat radiating fins 56, and particularly cools the downstream end portion of the tongue 20. Each radiation fin 56 has a tongue 2
Since it is inclined with respect to the width direction of 0, even if the tongue 20 has a small width, the area of the outer surface of the entire radiation fin,
That is, a large heat radiation area can be secured, and the cooling effect of the cooling air on the tongs 20 is further enhanced. Further, even if cooling air flows between the tongue 20 and the ejection head 36,
Leaked from between the tongue 20 and the tongue 20, the leaked cooling air does not adversely affect the cut tobacco layer L.

Further, since the discharge space 58 extends from the upstream end to the downstream end of the tongue 20 as described above, the cooling air flowing in the discharge space 58 also cools the other surface of the tongue 20. That is, the cooling effect of the tongue 20 is further enhanced. As described above, during operation of the hoist, if the tongue 20 is air-cooled, overheating of the tongue 20, particularly,
Overheating at the downstream end portion can be effectively prevented. As a result, the production speed of the tobacco rod R, that is, the productivity of cigarettes, can be increased while preventing the deterioration of the taste of the tobacco cigarette caused by the overheating of the tongue 20 and the reduction of the flavor and the sense of sauce.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, heat dissipation area 5
The temperature and supply amount of the cooling air supplied to the
It can also be controlled based on the temperature rise of. in this case,
A temperature sensor is built in the downstream end portion of the tongue 20, and the temperature of the cooling air in the air cooler 50 and the supply amount thereof are adjusted based on a sensor signal from the temperature sensor.

Further, the cooling fins 56 constituting the heat radiation area 54 are not necessarily arranged in the tongue 20, but may be such that they protrude from both side surfaces of the tongue 20. Further, after passing through the heat radiating area 54, the cooling air is not directly discharged to the atmosphere, and the cooling air can be reused for cooling other parts of the hoisting machine.

[0026]

As described above, according to the compression molding apparatus of a cigarette manufacturing machine (claim 1), the molding die used for compression molding of the cut tobacco layer is cooled by cooling air. During the operation of the manufacturing machine, the overheating of the mold can be prevented, and the cigarette productivity can be increased without causing the taste of the cut tobacco to deteriorate and the added flavor and feeling of sauce to be reduced. Even if the cooling air leaks, the cooling air does not adversely affect the cut tobacco layer.

If a heat radiation area is provided at the downstream end of the mold to allow the passage of cooling air (claim 2), overheating of the mold can be more effectively prevented without increasing the size of the mold. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a part of a hoist.

FIG. 2 is a schematic view of the vicinity of a tongue with a cover plate removed.

FIG. 3 is a view in which a part around a tongue is cut away.

FIG. 4 is a front view of a tongue.

FIG. 5 is a horizontal cross-sectional view of the tongue.

[Explanation of symbols]

 Reference Signs List 6 Molding bed 20 Tong (molding die) 36 Discharge head (air cooling means) 38 Discharge chamber (air cooling means) 42 Connection pipe 46 Connection hose 50 Air cooler (air cooling means) 54 Heat radiation area 56 Heat radiation fin

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Sato 1-17-7 Yokokawa, Sumida-ku, Tokyo F-term in Japan Tobacco Inc. 4B044 CB11Y

Claims (2)

[Claims] 1. A molding die for compression-molding a cut tobacco layer conveyed together with a wrapping paper on a molding bed in cooperation with the molding bed, and air cooling means for air-cooling the molding die. Compression molding equipment for cigarette manufacturing machines. 2. The air cooling means is provided in an end portion located at least on the downstream side of the molding die as viewed in the conveying direction of the cut tobacco layer, increases a heat radiation area of the end portion, and allows passage of cooling air. The compression molding device for a cigarette manufacturing machine according to claim 1, further comprising: an allowable heat radiation area; and a cooling air supply path for guiding the cooling air to the heat radiation area.