JP2997246B1 - Compression molding equipment for cigarette manufacturing machines - Google Patents

Abstract

An object of the present invention is to provide a compression molding apparatus for a cigarette manufacturing machine capable of improving productivity without lowering the quality of cigarettes. SOLUTION: In the compression molding apparatus of the cigarette manufacturing machine, a coolant passage 32 is secured in the tongue 20, and the tongue 20 is cooled by a coolant flowing through the coolant passage 32 during operation of the cigarette making machine.

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 compressing a cut cigarette layer in a cigarette manufacturing machine before wrapping the cut cigarette layer on a wrapper to form a cigarette rod.

[0002]

2. Related Background Art A compression molding apparatus of this kind is disclosed, for example, in Japanese Patent Publication No. 59-37069. Known devices are provided with so-called tongs, which are referred to as compression tongues.
The tongue has a lower surface with distributed depressions or protrusions. The lower surface of the tongue has a reduced contact area with the cut tobacco layer, which greatly contributes to reducing the passage resistance of the cut tobacco layer and preventing the cut tobacco from breaking.

[0003]

The productivity of a cigarette depends on the transport speed of the cut tobacco layer. The higher the transport speed, the more the tongs are heated due to the frictional resistance between the cut tobacco layer and its temperature. Becomes hot. Overheating of the tongs not only degrades the taste of the minced tobacco itself, but also causes an increase in pungent odor and a decrease in added flavor and sauce. Therefore, such a problem is a great limitation in improving cigarette productivity.

[0004] The present invention has been made based on the above circumstances, taste of shredded tobacco and it is an object of the cigarette raw without adversely affecting the flavor and the source sense
An object of the present invention is to provide a compression molding device of a cigarette manufacturing machine which greatly contributes to productivity improvement.

[0005]

SUMMARY OF THE INVENTION A compression molding apparatus according to the present invention includes a cooling liquid passage in a molding die .
It extends in the direction of passage of the chopped tobacco layer. And the coolant
The passage receives the supply of coolant from the coolant circulation circuit,
The reject liquid is located downstream of the coolant passage when viewed in the direction of passage of the chopped tobacco layer.
It flows from the side part toward the upstream part. In the coolant passage
The flowing cooling liquid prevents overheating of the mold (claim 1).
Preferably, the coolant circulation circuit detects the temperature of the mold.
Temperature sensor and the mold detected by this temperature sensor.
Based on the temperature, the temperature of the coolant supplied to the coolant passage is
A variable cooler is provided (claim 2). In this case,
The temperature of the mold is controlled with high precision .

[0006]

FIG. 1 shows a part of a cigarette making machine, a so-called hoisting machine. The hoist comprises an endless tobacco band 2, which is hung between front and rear rollers 4 (only one is shown) and runs in the direction of the arrow in the figure. The tobacco band 2 is formed as a suction band, and adsorbs the cut tobacco blown by the air stream in a layered manner to form a cut tobacco layer L. The formed cut tobacco layer L is transported to the tobacco band 2.

A shaping bed 6 is disposed below the illustrated roller 4, and the shaping bed 6 is vertically opposed to a part of the tobacco band 2 and extends horizontally in the conveying direction of the cut tobacco layer L. . 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, and has a gutter-like shape in which the depth increases while the groove width gradually decreases from the roller 4 side, and converges in a semicircular shape.

A pair of rollers 8 are provided at both ends of the forming bed 6.
The endless garniture tape 10 extends in the guide groove of the forming bed 6 between these rollers 8. The garniture tape 10 is guided via a roller 12 to a driving drum (not shown), and is partially wound around the peripheral surface of the driving drum. With the rotation of the drive drum, the garniture tape 10 in the guide groove of the forming bed 6 travels at the same speed in the conveying direction of the cut tobacco layer L.

In the vicinity of the roller 8a, the rollers 14,
A wrapper P is guided on the garniture tape 10 by being guided by these rollers 14, 16. The wrapping paper P is unwound from a wrapping roll (not shown), and can travel 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 roller 4 side. The shoe 18 and the tongue 20 form a compression molding passage of the cut tobacco layer between the shoe 18 and the guide groove of the molding bed 6. The leading edge of the shoe 18 is formed as a scraper edge close to the tobacco band 2 on the roller 4 and the shoe 1
The lower surfaces of the tongue 8 and the tongue 20 are formed as compression molding surfaces such that the guide grooves of the molding bed 6 face downward. The radius of curvature of the cross section of the compression molded groove gradually decreases from the leading edge of the shoe 18 toward the trailing edge of the tongue 20 and converges into a semicircle.

The cut tobacco layer L on the tobacco band 2 is separated from the tobacco band 2 by the leading edge of the shoe 18 and supplied onto the wrapping paper P. Thereafter, the cut tobacco layer L is placed on the wrapping paper P.
Is transported in the compression molding passage. In this transporting process, the wrapping paper P is bent into a substantially U shape together with the garniture tape 10 by the guide groove of the forming bed 6, while the cut tobacco layer L is gradually compressed from above according to the shapes of the compression molding surfaces of the shoes 18 and the tongs 20. As a result, the cut tobacco layer L is formed into a rod shape.

[0011] winding section 24 is composed type wound so called short holder and long holder, it slipped out with tongs 20 or we embossing Mitabako rod U
One side edge of the letter-shaped wrapping paper P is immediately bent into an arc shape by the short holder, and covers the upper half of the cut tobacco bar, while the gluing device 22 applies glue to the other side edge. Thereafter, the long holder bends the other side edge of the wrapping paper P into an arc shape and overlaps the one side edge on the cut tobacco rod. At this point, both side edges of the wrapping paper P are adhered to each other and closed, and the tobacco rod R is formed.

When the tobacco rod R passes through the dryer 26, the glue of the seam of the wrapping paper P is dried, and then cut into cigarette rods of a predetermined length by a cutting device (not shown). As shown in FIG. 2, a plurality of vertical grooves 28 are formed on the compression molding surface of the shoe 18 and the tongue 20, and these vertical grooves 28 extend in the direction of the compression molding passage.
The contact area of the compression molded surface with the cut tobacco layer or cut tobacco rod is reduced. In FIG. 2, the vertical grooves 28 are indicated by simple lines.

As shown in FIG. 3, the tongue 20 is closely attached to the back plate 30. A groove is formed on the contact surface of the tongue 20 with the back plate 30, and the groove is sealed by the back plate 30. As shown in FIG. 4, the groove of the tongue 20 includes a lower groove portion extending along the compression molding surface of the tongue 20, and upper groove portions connected to both ends of the lower groove portion and separated from each other. A cooling liquid passage 32 is formed from the upper groove portion to the other upper groove portion via the lower groove portion.

In the bank plate 30, through holes 3 are formed vertically.
4 and 36 are formed, and one ends of the through holes 34 and 36 are respectively opened in the upper groove portion of the coolant passage 32. As is clear from FIG. 4, the through hole 34 opens in the upper groove portion on the upstream side, and the through hole 36 opens in the upper groove portion on the downstream side. The other ends of the through holes 34 and 36 are connected to a connector 38.
Are connected to the conduits 40 and 42 through internal passages of
The conduits 40, 42 extend to a reservoir 44 storing coolant. An electric pump 46 is inserted in the pipe 42. Electric pump 46 is electrically connected to the switch 51, the switch 51 drives the electric pump 46 receives a drive signal of the hoisting machine, stops the driving of the electric pump 46 receives the operation stop signal of the hoisting machine .

When the electric pump 46 is driven, the electric pump 46 draws in the coolant from the reservoir 44 and transfers the coolant through the internal passage of the connector 38 and the through hole 36 of the back plate 30 to the coolant passage 32 in the tongue 20. To supply. The coolant flows in the coolant passage 32 as shown by the arrow in FIG. 4, and is returned to the reservoir 44 from the through hole 34 of the back plate 30 through the internal passage and the conduit 40 of the connector 3. Therefore, the electric pump 46 circulates the coolant between the reservoir 44 and the coolant passage 32 of the tongue 20.

In FIG. 3, reference numerals 48 and 50 indicate a guide groove of the molding base 6 and a compression molding surface of the tongue 20, respectively.
Reference numeral 52 indicates a cover plate. The cover plate 52 is attached to the back plate 30 via a spacer. During operation of the hoisting machine, the coolant constantly flowing in the coolant passage 32 of the tongs 20 cools the tongs 20 and prevents the tongs 20 from overheating. FIG. 5 shows the result of measuring the heating temperature of the tongue 20 with respect to the production speed of the tobacco rod R by a temperature sensor at a position indicated by a circle in FIG. Is shown.

In the case of cooling shown by a solid line in FIG. 5, even if the production speed of the tobacco rod R increases, the temperature rise of the tongue 20 is slight. On the other hand, in the case without cooling indicated by the broken line in FIG. 5, the overheating of the tongue 20 is remarkable as compared with the case with cooling, and the temperature increases as the manufacturing speed of the tobacco rod R increases. As is clear from FIG. 5, if the tongs 20 are cooled, the overheating of the tongs 20 is prevented, and as a result, the production speed of the tobacco rod R can be reduced without deteriorating the taste of the minced tobacco and reducing its flavor and source feeling. That is, the productivity of the cigarette can be increased.

Since the compression molding surface of the tongue 20 compresses the cut tobacco layer L most strongly in the downstream portion, the heating by the frictional heat becomes large. However, the coolant passage 32
Since the coolant inside flows from the downstream portion to the upstream portion of the tongue 20, the overheating of the tongue 20 is effectively suppressed. The invention is not restricted to the embodiments described above.

For example, as shown in FIG. 3, a cooler 54 can be inserted in the pipe 42 downstream of the electric pump 46. The cooler 54 cools the coolant to a predetermined temperature and supplies the coolant to the coolant passage 32. In this case, the cooling effect of the tongue 20 is further improved. In addition, the cooler 54
May receive the detection signal from the temperature sensor 56 used for measuring the temperature of the tongue 20, and may change the cooling temperature of the cooling liquid. In this case, the temperature of the tongue 20 can be controlled with high accuracy.

When the cooler 54 is used, when the operation of the hoist is stopped, the tongue 20 is cooled to room temperature or less, and there is a possibility that dew condensation may occur on the compression molding surface. In order to prevent such dew condensation, it is indispensable to stop the operation of the electric pump 46, that is, stop the supply of the coolant to the coolant passage 32 with the stop of the operation of the hoist. If a pump driven in conjunction with the running of the garniture tape 10 of the hoist is used instead of the electric pump 46, the supply of the coolant can be stopped simultaneously with the stop of the operation of the hoist.

If the cooling of the tongue 20 is sufficient even by air cooling, the air cooling system can be adopted.

[0022]

As described above, according to the compression molding apparatus of the cigarette manufacturing machine of the first aspect , the cooling liquid flowing through the molding die is provided.
Since the cooling liquid was flowed in the path to cool the mold ,
The overheating is prevented, and the productivity can be improved without lowering the quality of the cigarette. Claim 2
According to the device of the above, the temperature of the coolant supplied to the coolant passage
Can be varied by the temperature of the mold, and the temperature of the mold can be adjusted with high accuracy
Can be controlled .

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a tong provided with a shoe.

FIG. 3 is a diagram showing a coolant circulation path of a tongue.

FIG. 4 is a diagram showing a coolant passage in a tongue.

FIG. 5 is a graph showing the cooling effect of the tongs.

[Explanation of symbols]

 Reference Signs List 20 tong (molding die) 32 coolant passage (cooling means) 46 electric pump 54 cooler

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A24C 5/18

Claims (2)

(57) [Claims] A compression molding passage is formed between the molding bed and the molding bed.
Chopped tobacco layer provided on the wrapping paper with the forming mold
Is passed through the compression molding path together with the wrapping paper,
In the compression forming shape <br/> device cigarette making machine for compression molding Mitabako layer, is formed in the mold, the passing direction of the shredded tobacco layer
And a cooling fluid passage extending below the cooling fluid passage as viewed in the direction of passage of the chopped tobacco layer.
The cooling to flow the cooling liquid from the flow portion to the upstream portion
A compression molding apparatus for a cigarette manufacturing machine, comprising: a cooling liquid circulation circuit for circulating a cooling liquid through a liquid passage . 2. The cooling liquid circulation circuit according to claim 1 , wherein
Temperature sensor to detect the temperature and the temperature sensor to detect
Is supplied to the coolant passage based on the temperature of the molding die.
2. A compression molding apparatus for a cigarette manufacturing machine according to claim 1 , further comprising a cooler for varying the temperature of the cooling liquid to be produced.