JPS5913184B2 - Manufacturing equipment for rod-shaped fiber fillers with hollow fibers in the center - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus capable of inserting hollow fibers into the center of a rod-shaped fiber filler for manufacturing the same.

Specifically, in the flow of rod constituent materials in a continuous production device for fiber rods, the hollow fibers The present invention relates to an apparatus for producing a rod-shaped fiber filler having a hollow fiber in the center, characterized by being equipped with a mechanism for inserting the fiber filler into a fiber material.

Currently, most cigarette filters are filled with long fibers of cellulose acetate in a rod shape.

The manufacturing method for cigarette filters involves first aligning bundles of crimped long fibers, applying a plasticizer to them, attaching the single fibers partially to each other, and wrapping the outer periphery with wrapping to create an endless belt. There is a method of tightening the wrapping paper using a screwdriver, fixing the wrapping paper with glue to make a rod with a constant circumference, and then cutting it to a constant length with a cutter.

The product thus obtained is called a filter plug and usually has a length of 66 mm to 120 mm.

This plug is further divided into four or six equal parts and is called a filter chip, and the chip is connected to a cigarette to make a filter-equipped cigarette.

Recently, as the health issues of smokers have become more important, people have started to look for cigarettes with low tar and nicotine content, and the Takasawa permeability filter was developed and used as a means to achieve this goal. It's starting to look like this.

In order to increase the p-permeability of a filter, methods such as increasing the filling amount of filtering material or decreasing the single fiber fineness and increasing the number of fibers are taken, but in either case, the suction resistance during smoking It turns into a dog and makes the smoker feel uncomfortable, and the smoke itself loses its flavor! It becomes inferior in terms of palatability.

One way to increase the permeability without reducing the aroma and taste is to use a hollow filter.

For example, a hollow plastic tube inserted into a fiber rod is used as a filter so that a small portion of the smoke hits the tongue directly without passing through the filter, reducing the suction resistance of the filter as a whole and improving the flavor of the smoke. It can be measured.

As a manufacturing method for such hollow filters,
The following method is disclosed in the invention entitled "Cigarette filter, method and apparatus for manufacturing the same" described in Japanese Patent No. 5079.

That is, in a filter plug winding machine for producing cigarette filter plugs from fiber tow, a plastic hollow tube is fed into the stream of fiber material upstream of a focusing guide that focuses a web of fiber material, and the hollow This is a method of concentrating and tightening the fibers so that the tube is at the center of the fibers.

In this method, the relative positions of the hollow tube and the fiber material on the product rod are determined in a focusing guide.

This focusing guide is a nozzle with an annular Venturi-shaped opening on its inner surface, through which air or gas is injected at an angle that cooperates with the flow of the fiber material, resulting in stress relief due to the escape of the air or gas at the exit of the guide. As a result, the fibrous material spreads evenly around the conduit into which the hollow tube is introduced, and by winding it up as it is, a rod is produced in which the hollow tube is approximately at the center of the fibrous material.

Although this method allows the hollow tube to be inserted into the center of the filter rod, the device used in this method has a conduit for the hollow tube located in the center of the fiber material passage and a focusing guide for opening efficiency. Since it is necessary to keep a small gap between the pipe and the pipe (inner surface), it is difficult to make adjustments at the start of operation, such as when introducing the fiber material for the first time.

Once the fiber material passes between the nozzles, it is fine as long as the machine is operating smoothly, but if there is an imbalance in the flow of the fiber material, it may become sluggish in this area and cause the position of the hollow tube conduit to shift. This is difficult to adjust when the machine is stopped or restarted.

As a result of intensive research, the present inventors have discovered an apparatus for producing a rod-shaped fiber filler equipped with supply fibers of hollow material, which allows easy adjustment of the relative positions of the hollow material and the fiber material and is suitable for continuous operation.The present invention has been made. reached.

That is, the present invention applies a plasticizer to the opened crimped continuous tow, and then bundles the tow, wraps the outer periphery of the tow with wrapping paper and tightens it using an endless belt, and glues the wrapping paper. In an apparatus that manufactures rod-shaped fiber fillers by fixing, hollow fibers are inserted into the upper part of the gap between the trumpet guide for converging the tow and the presser cover that receives the condensed tow in the winding and forming part. The hollow fiber insertion guide includes a guide, a support thereof, and a supply means for supplying the hollow fiber to the hollow fiber insertion guide, and the hollow fiber insertion guide is made of a thin curved metal tube, and the hollow fiber is inserted from the gap between the trumpet guide and the presser foot. an insertion section for inserting the tow into the flow of the tow;
It is characterized by having a tip opening that is located upstream of the point where the wrapping paper and the endless belt join, and on the central axis of the space formed by the endless belt and the presser lid, and that opens in the flow direction of the tow. The present invention provides an apparatus for producing a rod-shaped fiber filler having a hollow fiber in the center.

In the present invention, it is preferable to use hollow fibers as the hollow material inserted into the rod-shaped fiber filler.

As a method for producing hollow fibers, for example, Japanese Patent Application Laid-Open No. 47-401
There is a method as disclosed in Publication No. 0.

The hollow material suitable for the present invention may be any flexible continuous hollow body and is not limited to fibers.

Further, the wall of the hollow body does not have to be perfect, and even a C-shaped fiber having a nearly circular cross section can be used.

In the present invention, a thin curved metal tube is used as a hollow fiber insertion guide.

In a typical filter plug winding machine, the side where the wrapping paper joins is located downstream of the trumpet guide for tow convergence and upstream of the point where the tow, wrapping paper, and endless belt join. By inserting the hollow fiber insertion guide from the side opposite to the rod, the hollow body can be easily adjusted to be located approximately at the center of the rod.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the apparatus of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flow diagram showing the main parts of the device and the front part of the present invention.

In FIG. 1, a tow 2 is pulled out from a tow veil 1 in which cellulose acetate long fibers have been drawn and crimped, and a plasticizer is uniformly added to the tow using a fiber opening device and a plasticizer addition device 3.

Next, the fibers are bundled by a simple trumpet-like trumpet guide 5 through the supply roll 4 and guided to the winding and forming section 7.

A tapered truncated conical space is formed between the easily removable presser foot 6 on the upper side of the tightening molding portion 7 of the rod, the wrapping paper 10, and the endless belt 8 that joins from below. After wrapping the tow in this space to a size corresponding to the thickness of a predetermined product rod, glue is applied from the adhesive nozzle 12 to one end of the wrapping paper 10, and the iron 1
3 to complete the adhesion and obtain a continuous rod 14.

The endless belt 8 is moved in the direction of the arrow by a drive pulley 9, wraps the wrapping paper 10 and the bundled fiber tow along the shape vrC of the groove in the tightening molding part γ, and wraps the wrapped fiber tow, thereby continuously tightening the rod 14. mold.

The continuous rod 14 is extruded onto the endless belt 8, placed at a cutter 15, and cut into a certain size to obtain a filter plug 16.

In the above-mentioned winding machine, the hollow fiber insertion guide 18 for supplying the hollow fibers 17 in the zone between the trumpet guide 5 and the rod winding and forming part 7 is placed in the upper part of the figure, that is, between the wrapping paper 10 and the endless belt 8. Place it in the opposite position.

FIG. 2 shows an enlarged view of the main parts of the device of the present invention.

The hollow fiber insertion guide 18 is curved, and the opening direction of the tip 19 coincides with the direction in which the fiber material flows.

In this case, the height of the tip 19 is such that the inner space of the molding section constituted by the presser foot 6 and the wrapping paper 10 is located on the X' central axis.

FIG. 4 shows the relative positions of the fiber material 2 and the hollow fiber insertion guide 18 in the inner space of the tightening molding section.

Namely A, B. C is a cross section of the internal space of the molding section at points A, B, and C in FIG. 2, respectively.

A is the entrance of the molding section, C is the point where the envelopment of the hollow body is completed, and B is A.

It is the middle point of C.

The distance between A and C, ie, the distance at which the hollow fiber insertion guide 18 is inserted into the molding part internal space, is appropriately determined to be 10TtTL to 50TTL.

The insertion guide 18 is approximately Q, 5 In from the outer diameter of the hollow fiber.
A metal tube with a large inner diameter, such as stainless steel or brass tube.

Although the wall thickness is arbitrary, a thinner one is more convenient, and for example, a wall thickness of 0.25 mm can be used.

For example, when the hollow fibers to be enclosed have an outer diameter of 0.5 to 1 feather, the outer diameter of the insertion guide will be 2 to 2.5 mm.

The insertion position of the insertion guide 18 is adjusted using the insertion guide support part 20 shown in FIG. 2, and can be set at any position vertically, frontward, backward, leftward or rightward.

Further, the curved portion 18b of the hollow fiber insertion guide is formed into an arc shape so that the support portion 20 can turn around an axis that passes through the center point 21 and is perpendicular to a vertical plane that includes the center line of the path through which the focused tow flows. It is preferable that the hollow fiber insertion guide 18 be configured to have at least an actuation position 22 and a disengagement position 23, and be stably seated at each position with a stopper (not shown).

This has the effect of improving the workability and ease of handling of the apparatus of the present invention.

The results of manufacturing operation of a rod-shaped fibrous filler having a hollow fiber in the center using the apparatus of the present invention will be shown below as an example.

As the example fiber material, cellulose acetate 1.9Y-48,
Diameter 7.86m 71L, length 12 using 0OOD tow
A 0mm filter plug was wrapped around it.

The hollow fiber insertion guide of the present invention is used in this center, and the outer diameter is 1
．． Hollow fibers of cellulose acetate with a diameter of 0.0% and an inner diameter of 0.7% were encapsulated.

The inner diameter of the insertion guide used was 1.5%, the outer diameter was 2.0%, and the insertion depth was 40%.

At this time, the positions of the hollow fibers of the continuously manufactured hollow filters were measured and the standard deviation was determined as shown in Table 1.

The measurement points are a, b, c, and d in Fig. 5, and the number of trees measured is 50 trees.

From the results in Table 1, it can be seen that in the hollow encapsulated rod obtained by this device, the hollow fibers are located at the center of the hollow filling body.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing the main parts of the device and the front part of the present invention. FIG. 2 is an enlarged front view of the main parts of the device of the present invention. FIG. 3 is a partial side view taken along line xx' in FIG. 2. 4A, B, and C are cross-sectional views showing the relative positional relationship between the fiber tow and the hollow fiber in each passage portion at positions A, B, and C in FIG. 2; FIG. 5 shows cross-sectional views of the rond-like fibrous packings having hollow fibers in the center, which are cited as examples of the production operation results of rond-like fibrous packings having hollow fibers in the center using the apparatus of the present invention. 5... Trumpet guide, 6... Presser foot lid, 7.
... Sealing and forming part, 8... Endless belt, 10.
...Wrapping paper, 18...Hollow fiber insertion guide, 20...
Hollow fiber insertion guide support.

Claims (1)

[Scope of Claims] 1. After applying a plasticizer to the opened crimped continuous tow, the tow is bundled, wrapped around the outer periphery of the tow with wrapping paper, and tightened using an endless belt, and the wrapping paper is glued. In an apparatus for manufacturing a rod-shaped fiber filler by fixing the
A hollow fiber insertion guide 18, its support portion 20, and a hollow fiber insertion guide are installed above the gap between the trumpet guide 5 for converging tow and the presser foot 6 that receives the gathered tow in the winding and forming part 7. The hollow fiber insertion guide 18 is made of a thin curved metal tube, and inserts the hollow fiber into the tow flow from the gap between the trumpet guide 5 and the presser foot 6. Insertion part 18a to be inserted, tow, wrapping paper 10 and endless belt 80
It is characterized by having a tip opening 19 of the hollow fiber guide located upstream of the merging point and on the central axis of the space formed by the endless belt 8 and the presser cover 6 and opening in the flow direction of the tow. A manufacturing device for rod-shaped fiber filling bodies with hollow fibers in the center. 2. The apparatus for manufacturing a rod-shaped fiber filling body having a hollow fiber at the center according to claim 1, wherein the curved portion 18b of the hollow fiber insertion kite 18 is arcuate. 3. The rod-shaped support part 20 having a hollow fiber in the center as described in claim 1, wherein the relative position between the hollow fiber insertion guide 18 and the tow tightening molding part 7 can be adjusted in the front and back, up and down, and left and right directions. Fiber filler manufacturing equipment. 4 The support portion 20 is the curved portion 18b of the hollow fiber insertion guide 18
The hollow fiber insertion guide 18 can be rotated at a desired angle around a center point 21, and the hollow fiber insertion guide 18 can be moved to at least an operating position 22 and a detachment position 23, respectively.
An apparatus for producing a rod-shaped fiber filler having a hollow fiber in the center according to item 2 or 3.