JPH0322191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fiber filler. More specifically, the present invention relates to a method for producing a fiber filling with high commercial value, in which the entire bag-like side fabric is filled with short fibers at a uniform density, and no slack occurs on one side of the bag-like side fabric. .

As a method for manufacturing quilts and cushions, a method has already been proposed in which short fibers are blown into a bag-like side material together with compressed air to form a fiber filling all at once. This method is very rational and highly productive because it omits a lot of manual labor compared to the conventional method of laminating fiber sheets formed by a card method in a planar manner inside a bag-shaped side fabric. However, when manufacturing sheet-like fiber stuffing with a large planar area such as a mattress, no matter how much compressed air or pressure is used, it is difficult to uniformly fill every corner of the bag-like side material with short fibers. However, there is a problem that the high productivity cannot be fully utilized.

In view of the above-mentioned problems, the object of the present invention is to make it possible to uniformly fill the entire bag-like side fabric with short fibers using pressurized gas even if the sheet-like stuffing has a large planar area, and to make it possible to fill the entire bag-like side fabric evenly with short fibers, and to reduce the It is an object of the present invention to provide a method for producing a fiber filling with high commercial value that does not cause slack on one side of a bag-like side fabric.

The manufacturing method according to the present invention achieves the above object,
In the method of manufacturing a fiber filling by inserting a bag-like side material between a pair of control plates provided oppositely and blowing opened short fibers into the bag-like side material together with pressurized gas, the inner surface of the pair of control plates is provided. Elongated protrusions extending across the inner surface of the control plate are provided at corresponding positions on the sides, and the bag-like side material is extended along the surface of the elongated protrusions on one control plate side and the surface of the control plate. and when setting it so that it is divided into a plurality of compartments by the elongated protrusion, the bag-like side fabric is pushed in a relaxed state toward the base of the elongated protrusion so as to follow both sides of the elongated protrusion. Then, while vibrating at least one control plate, the short fibers are sequentially blown into each of the plurality of compartments of the bag-shaped side material together with pressurized gas.

The short fibers used in the present invention include synthetic fibers such as polyester, polyacrylic, polyamide, and polypropylene; natural fibers such as cotton, hemp, and silk;
Alternatively, it may be a mixture of synthetic fibers and natural fibers, but it is preferable to use fibers with low entanglement. Among these, polyester is the most preferred material from the viewpoint of the compression properties of the filling. Such short fiber raw cotton is often sufficiently opened using a fiber opening machine before being blown into the bag-like lining together with pressurized gas. Examples of the fiber opening machine include a card machine, garnet needle, metallic needle, etc. Preferably used is a method in which the material is wound around a cylinder and rotated at high speed.

As the pressure gas, air, nitrogen, carbon dioxide water vapor, etc. can all be used, but among these, air is most suitable from the viewpoint of industrial production. The flow rate and pressure of this pressure gas are preferably 1 to 200 m ³ /min and 10 to 1000 mmAq/cm ^{2 ,} respectively.

Fabric such as woven fabric is used for the bag-like side material, and it has a moderate air permeability, with a value of 10 to 50 c.c./cm ² as measured by a Frazier type air permeability meter. A value of about sec is suitable.

The present invention involves inserting such a bag-like side fabric between a pair of control plates provided opposite each other, and in blowing short fibers together with pressurized gas into the bag-like side fabric, the structure of the control plate and its control are We have devised a method for setting the bag-shaped side material that is inserted into the board. That is, elongated protrusions are provided at mutually corresponding positions on the inner surfaces of the pair of control plates, and the elongated protrusions divide the inside of the bag-shaped side space set inside into a plurality of compartments. . Then, the short fibers are sequentially blown into each of the compartments divided into a plurality of compartments together with the pressurized gas. Generally, when the planar area of a bag-like side material such as a mattress pad increases, it becomes difficult to evenly and uniformly fill every corner of the bag-like side material with short fibers, no matter how high the pressure of the pressurized gas is. As mentioned above, by dividing the interior of the bag-like side fabric into a plurality of compartments using long protrusions and blowing short fibers into each compartment in turn, it is possible to create a bag-shaped side fabric with a large planar area. This makes it possible to fill the short fibers so that the density is uniform throughout.

However, by sequentially blowing short fibers into the plurality of compartments divided by the elongated protrusions, it is possible to fill the entire bag-like side area with short fibers uniformly, but on the other hand, the elongated protrusions Depending on how the bag-like side fabric is set through the bag, either the upper side fabric or the lower side fabric may become loose when the fiber filling is formed. This may significantly reduce its commercial value as a fiber filling.

Therefore, in the present invention, when the bag-shaped side material is set on a control plate provided with elongated protrusions, the bag-like side material runs along the outer surface of the elongated protrusion of one control plate, and the control plate It is covered along the surface, and when the bag-like side material is clamped and set by the elongated projections of both control plates, it is made to be in a relaxed state as a whole. As described above, the bag-like side fabric is set in a relaxed state by being pushed toward the base of the long protrusion along both sides of the elongated protrusion, and short fibers are blown into the bag-like side fabric in the relaxed state. Therefore, the upper and lower sides of the side fabric swell evenly, and the loosening phenomenon of the bag-like side fabric is completely eliminated.

It is preferable that the area of each compartment formed by dividing the bag-like side area in plan view is 1000 to 10000 cm ² . Further, the thickness is preferably 3 to 20 cm, more preferably 5 to 15 cm.

Hereinafter, a detailed description will be given along with an embodiment shown in the drawings.

1 and 2 show schematic diagrams of an apparatus for carrying out the invention.

In the figure, 11 is a feed lattice on which raw cotton 10, which is a raw material, is loaded and conveyed. The raw cotton 10 on the feed lattice 11 is sequentially moved to the feed roller 12 while being conveyed.
As a result, the fibers are supplied to the fiber closing cylinder 13 which rotates at high speed. The raw cotton 10 is conveyed along the circumferential surface of the cylinder 13 while being opened into single fibers by the speed ratio of the feed roller 12 and the cylinder 13. The opened short fibers are sucked by the fan 14 and then forced to be sent to the forming device 16 via the duct 15 on the opposite side. Here, the duct 15 has three outlet ducts 17a, 17b, 1 at its end.
7c, each with an outlet connected to the molding device 16.
It's starting to look like this. Further, the branch portions of the ducts are provided with blow-off ducts 17a, 17b, and 17b, respectively.
Valve 18a, 18b, 18c corresponding to 17c
is provided, and its flow path can be switched.
In the molding device 16, control plates 19 and 20 are arranged on the upper and lower sides, and at least one of the control plates (in the figure, 2
0) is made to vibrate up and down by a vibration device. Short fibers 2 are blown from a duct into the bag-like side fabric 1 inserted between the control plates 19 and 20, forming a fiber filling.

As shown in FIGS. 3 and 4, the molding device 16
The upper control plate 19 is swingably provided with respect to the bracket 22, and can be swung between a mutually parallel position spaced at a constant interval and an upwardly expanded position with respect to the lower control plate 20. . Each control board 19,
On the inner surface of 20, elongated protrusions 23, 23 are provided at positions corresponding to each other. This elongated projection 23 can freely appear and retract into a position where it protrudes outward from the inner surface of the control plate and a position where it retracts inward from the surface. Furthermore, when the upper control plate 19 is laid down in a position parallel to the lower control plate 20 with this elongated protrusion 23 protruding, the tops of the upper and lower elongated protrusions 23, 23 touch each other. By holding the bag-shaped side fabric 1 set inside, the interior is divided into three compartments.

Now, in the above-described apparatus, when the bag-shaped side fabric 1 is first set in the forming apparatus 16, it is carried out as follows.

First, the upper control plate 19 is expanded, and the bag-shaped side fabric 1 is placed on the lower control plate 20. At this time, as shown in FIG.
Push it in toward the base of the protrusion 23 by hand or the like from the top surface of the protrusion 23. When the bag-like side fabric 1 is placed along both sides of the elongated protrusion 23 in this way, the bag-shaped side fabric 1 is further aligned with the control plate 20 in the portion other than the elongated protrusion 23. It also comes into contact with the inner surface. Therefore, in this state, when the upper control plate 19 is laid down to a position parallel to the lower control plate 20, the bag-like side fabric 1 remains in a relaxed state and moves upward and downward as shown by the chain line in FIG. Long protrusion 23,
It is clamped and set by 23. At the same time, the bag-like side fabric 1 is divided into three compartments by the elongated projections 23. A blowout duct 1 is installed in each compartment of the bag-shaped side material 1 divided into three in this way.
The air outlets 7a, 17b, and 17c are inserted and gripped by the pinch rollers 21.

For the bag-shaped side fabric 1 set as described above,
While vibrating the lower control board 20 in the vertical direction,
First, the short fibers 2 are blown into the central compartment from the blow-off duct 17a together with compressed air. By such blowing, the compressed air penetrates the side fabric and escapes to the outside, but only the short fibers 2 remain in the bag-like side fabric 1 and are filled. During this filling process, the bag-like side material 1 set in the above-mentioned relaxed state is filled with elongated protrusions 2.
The upper fabric and the lower fabric will swell up and down evenly around the clamping points 3 and 23, and neither one of them will become unevenly slack.

When filling of the central compartment with the short fibers 2 is completed, the elongated protrusion 23 corresponding to either the left or right compartment is inserted from the surface of the control plates 19, 20, and the compartment in which the insertion is performed is performed. Blowout duct 17b on the side
Alternatively, blowing is performed using 17c. In this way, short fibers are sequentially blown in while the elongated projections 23 are recessed and the partition walls are removed. In this case as well, since the bag-like side fabric 1 is set in the above-mentioned relaxed state, the upper and lower fabrics swell evenly, and one side does not become loose. In addition, by dividing the bag-like side material 1 into a plurality of compartments using the long projections 23 and blowing the short fibers into them in sequence, the short fibers can be uniformly distributed over the entire bag-like side material. It becomes possible to fill it.

In addition, since the control plate of the above device is configured to be expandable, it is easy to set the bag-shaped side fabric.
The short fiber blowing operation can be performed efficiently. Furthermore, when the elongated protrusion is retractable, the blowing operation for each compartment can be performed continuously, making the operation even more efficient.

FIG. 5 shows another embodiment. In this embodiment, the elongated protrusions 23a provided on the control plates 19 and 20 are not continuous in the length direction as in the previous embodiment, but are made up of a plurality of discontinuous blocks. This is how it is configured. This discontinuous configuration of the elongated protrusions allows the blown compressed air to escape laterally through the bag-like side material, which is preferable for uniform filling.

In each of the above-mentioned embodiments, the control plate has a plate-like structure with no air permeability, but it may have a porous structure such as a wire mesh. Further, although the elongated protrusion is configured to be retractable, it may be configured to be detachable.

As described above, the method for producing a fiber stuffing according to the present invention involves inserting a bag-like side material between a pair of control plates provided opposite each other, and blowing opened short fibers into the bag-like side material together with pressurized gas. In the method for manufacturing a fiber filling, elongated protrusions extending across the inner surfaces of the pair of control plates are provided at corresponding positions on the inner surfaces of the pair of control plates, and the bag-shaped side material is attached to one of the control plates. It is set along the surface of the elongated projection on the side and the surface of the control plate, and is divided into a plurality of compartments by the elongated projection, and when the bag-like side material is in a relaxed state, the elongated projection is The short fibers are inserted along both sides toward the base of the elongated protrusion, and then the short fibers are sequentially blown into the plurality of compartments of the bag-like side material together with pressurized gas while vibrating at least one control plate. Even if the sheet-like stuffing has a large planar area, short fibers can be filled uniformly over the entire bag-like side, and the fiber stuffing after filling will not loosen unevenly on either side of the bag-like side. There are no such inconveniences.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the apparatus for manufacturing the fiber-filled object of the present invention with only the molding part shown in a plane view, and FIG.
3 is an enlarged perspective view of the molding section of the same apparatus, FIG. 4 is a sectional view of the same, and FIG. 5 is a perspective view of the molding section according to another embodiment. 1... Bag-shaped side material, 2... Short fiber, 11... Feed lattice, 13... Cylinder, 14... Fan, 17a,
17b, 17c... Blowout duct, 16... Molding device,
19, 20... Control board, 23, 23a... Long projection.

Claims (1)

[Claims] 1. A method of manufacturing a fiber filling by inserting a bag-like side material 1 between a pair of control plates 19 and 20 provided opposite each other, and blowing opened short fibers into the bag-like side material 1 together with pressurized gas. , the pair of control plates 1
Elongated protrusions 23 extending across the inner surfaces of the control plates 19 and 20 are provided at corresponding positions on the inner surfaces of the control plates 19 and 20, respectively, and the bag-shaped side fabric 1 is When setting the bag-shaped side fabric 1 along the surface of the elongated protrusion 23 and the surfaces of the control plates 19 and 20 and dividing it into a plurality of compartments by the elongated protrusion 23, the bag-like side fabric 1 is kept in a relaxed state. The short fibers are pushed toward the base of the elongated protrusion along both sides of the elongated protrusion 23, and then, while vibrating at least one of the control plates 19, 20, the short fibers are sequentially inserted into each of the plurality of compartments of the bag-like side fabric 1. A method for producing a fiber filling, characterized by blowing together with pressurized gas.