JPH0419878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Technology) The present invention relates to a method and apparatus for preforming a cushion material. More specifically, the present invention relates to a method and an apparatus for preforming cushion materials used for beds, seats, etc., which are made of synthetic fiber filament aggregates having three-dimensional curls.

(Prior art) A cushion material is produced by cutting a filament with three-dimensional curl into a predetermined size and making it into cotton, then compression-molding it into a predetermined shape while opening the cotton, and bonding the contact points of the filaments with adhesive. The present inventor has previously discovered that it is highly repellent, has good breathability, and has excellent cushioning properties (Japanese Patent Application Laid-Open No. 1986-1999).
No. 152573). Further, a cushion material is provided in which the mutual contact points of the filaments of a synthetic fiber filament assembly having three-dimensional curls are bonded with an adhesive, and the curl shape of the filaments of the cushion material is partially oriented in a direction. The curled filaments, which have various shapes and are elastically deformed to form each other, are partially tightly intertwined in a direction that produces load strength, and the intertwined parts are formed as required. The filament lock material, which is distributed according to the load strength, has even better effects.
The present inventor previously discovered (Japanese Patent Application Laid-Open No. 54-138662
issue).

These cushion materials are made by compressing three-dimensional curled filaments made of cotton using an endless belt and/or rollers or other means to form a filament aggregate block having a predetermined bulk density, and then equipping this formed body with barbs. After needling with a needle to achieve a predetermined needle density, or rubbing, or without applying these, adhesive liquid is applied from above to the filament molded body on an endless belt running in an almost horizontal direction. It is produced by spraying or by immersing a filament molded body in an adhesive liquid, pulling it out of the liquid, and heating and drying it on an endless belt running in a substantially horizontal direction.

However, in such a method, the bulk density of the filament aggregate block depends on the amount (volume) of the three-dimensional curl filament supplied and its degree of compression. It is necessary to keep the supply amount and compression degree constant. However, although it is relatively easy to maintain a constant degree of compression, it is extremely difficult to maintain a constant supply amount. That is, since the three-dimensional curl filament is extremely bulky and is easily compressed and its volume changes even with a slight pressing force, it is usually supplied by wind power using a cotton opener or the like. For this reason, the supply amount varies depending on the air volume, the amount of three-dimensional curl filaments supplied to the delinter, etc., so for example, the amount of three-dimensional curl filaments (for example, height, etc.) supplied onto a belt conveyor etc. It is difficult to maintain a constant amount of filament, and the surface of the filament supply amount will be undulating. In order to keep the layer height constant, it is conceivable to use a blade to scrape it off, but as mentioned above, three-dimensional curl filaments are easily compressed by even a slight pressing force, so even if the layer height is kept constant, However, there was a drawback that the bulk density had already changed. Furthermore, even when manufacturing cushion materials such as automobile cushion materials, which are vertically asymmetrical, have uneven parts, and have partially different hardness distributions, mechanical methods can be used without changing the bulk density to the above-mentioned shape. It was extremely difficult to automatically form such a structure.

However, the present inventor further provided an aggregate of short filament fibers having three-dimensional curls to a conveyance device, and while moving the conveyance device, rotated a rotating body having a large number of acicular objects standing upright. A preforming method (Japanese Unexamined Patent Application Publication No. 1983-1973) in which the needle-like material is brought into contact with a filament short fiber aggregate and formed into a predetermined shape by scraping the entire surface or scraping off a predetermined portion.
37481, JP-A No. 57-37482), which made it possible to preform a cushion material into a predetermined shape without changing the bulk density. However, when the cushion material is preformed by this method, the rotational peripheral speed of the rotating body formed by erecting a large number of needle-like objects is usually
It was set at 150-2000m/min. The reason why the rotating body is rotated at such a relatively high speed is that the filament short fibers can be easily scraped off at a predetermined location by the needle-like object, and the filament short fibers are less likely to become entangled with the needle-like object. It was particularly effective in the case of preforming with surface scraping and in the case of preforming with relatively shallow partial scraping. When scraping is performed partially in such a rotational circumferential speed range of the rotating body, the boundary line between the scraped portion and the non-scraped portion of the filament short fiber aggregate becomes quite clear. However, the boundary angle at the boundary tends to be slightly blunter than the desired angle,
There is no problem if the scraping is relatively shallow, but if the scraping is deep, the upper part of the scraped area may expand more than necessary, and it may not be completely satisfactory. I couldn't get the desired results.

(Problems to be Solved by the Invention) Therefore, the present invention attempts to solve the above-mentioned conventional problems in preforming cushion materials.

That is, an object of the present invention is to provide an improved method and apparatus for preforming a cushion material. The present invention also provides an improved preforming method for cushion materials used for beds, seats, etc., which are made of synthetic fiber filament aggregates having three-dimensional curls, and in particular cushion materials that require deep scraping during preforming. The purpose of this invention is to provide such a device.

Structure of the Invention (Means for Solving the Problems) The above objects are to supply an aggregate of short filament fibers having three-dimensional curls to a conveying device, and to move a large number of needle-like objects while moving the conveying device. In the preforming method for a cushion material, the method comprises rotating a rotary body, and bringing the needle-like object into contact with a filament short fiber aggregate and scraping off a predetermined portion to form a cushion material into a predetermined shape. Circumferential speed
This is achieved by a method for preforming cushion materials characterized by a speed of 0.1 m/min to 15 m/min.

The present invention also provides that the relative rotational circumferential speed of the rotating body with respect to the filament short fiber aggregate to be conveyed is 0.15.
1 shows a method for preforming cushion material at a rate of m/min to 17 m/min. The present invention also provides a cushion in which the short filament fibers scraped off by the rotating body are stripped by another rotating body having needle-like objects that can interfere with the needle-like objects of the rotating body. This shows a method for preforming the material. The present invention further provides that the rotational circumferential speed of the other rotating body is about 20 to 10000% of the rotational circumferential speed of the rotary body.
This is a quick method of preforming cushion material. The present invention provides a method for preforming a cushion material in which the rotating shafts of the rotating body and the other rotating body rotate while moving up and down. The present invention also provides a method for preforming a cushion material, in which a plurality of the aforementioned rotating bodies and a plurality of the aforementioned other rotating bodies are used.

Furthermore, the above-mentioned objects include a conveyance device for filament short fiber aggregates having three-dimensional curls, a scraping device provided on the conveyance device and consisting of a rotating body having a large number of needle-like bodies erected thereon; This is achieved by a cushion material preforming device which is equipped with a stripping device consisting of a rotating body having a large number of needle-like objects erected and which can interfere with the needle-like objects of the scraping device.

The present invention also provides an apparatus for preforming cushion material, which is constructed such that the rotating shafts of the rotating bodies of the scraping device and the stripping device can move up and down. The invention further provides a device for preforming cushion material in which the needles of the scraping device and the stripping device are composed of cloth, metallic, tekine or porkypine. The present invention also provides an apparatus for preforming cushion material, in which a plurality of rotating bodies are provided for each of the scraping device and the stripping device.

(Function) The most important feature of the method for preforming a cushion material of the present invention is that the short filament fibers are scraped off at a very low speed.

Conventionally, it has been said that the optimal rotational peripheral speed of a rotary body consisting of a large number of needle-shaped objects used for scraping short filament fibers is 150 to 2000 m/min. It was thought that the filament short fibers would be scraped in chunks by the material, and the filament short fibers would also be scraped off at other locations, making it impossible to perform the desired preforming.

However, when the rotating body is operated at a very low speed, that is, when the rotational circumferential speed is set to 0.1 m/min to 15 m/min, there is no possibility of scratching in lumps.
The short filament fibers are scraped only in the part that comes into contact with the needle-shaped object, and moreover, the boundary line and boundary angle at the boundary between the scraped part and the non-scraped part of the filament short fiber aggregate are better than the conventional scraping by high-speed rotation. Both are clear and allow extremely accurate scraping. This is particularly advantageous in preforming that requires deep scraping to form a concave shape, such as in the case of preforming into the shape shown in FIG.

Furthermore, in the cushion material preforming apparatus of the present invention, a large number of needle-like objects are provided upright so as to be able to interfere with the needle-like objects of the scraping device, which is a rotating body having a large number of needle-like objects erected. A major feature is that a rotating body is further provided as a stripping device. That is, when the filament short fibers are scraped at a very low speed as in the above-mentioned method, there is a risk that the scraped filament short fibers may become entangled with the needle-shaped object of the rotating body of the scraping device. In order to prevent the tangled filament short fibers from interfering with the desired scraping, the stripping device scrapes off the filament short fibers tangled in the scraping device, so that the scraping device always functions normally. .

(Example) Hereinafter, the present invention will be explained in more detail based on an example of the present invention.

Fiber materials for the short filament fibers used in the present invention include polyester, polyamide, polypropylene, etc., and polyester is most preferred. The monofilament has a thickness of 30 to 2000 deniers, preferably 50 to 1000 deniers, most preferably 100 to 600 deniers, and has three-dimensional curls. Here, the term 3-dimensional curl refers to a 3-dimensional curl in a broad sense such as a bidirectional curl or a 3-directional curl, but preferably a 3-dimensional 3-dimensional curl filament, which is disclosed, for example, in Japanese Patent Application Laid-open No. 14448/1983 by the same inventor. A double-twisted filament D as shown in FIG. 9 is made by the method and apparatus described in the above, and then cut to a predetermined size and untwisted to obtain a three-directional three-dimensional curl filament F as shown in FIG. It will be done. The length of the filament after cotton-making is preferably 25 to 200 mm, particularly preferably 60 to 150 mm. Thus, portions of the filament coil in portions a over portions b, and portions c coil over portions d. However, the e section does not coil over the f section, but below it. Thus,
The filament sections e to d are in two entanglements or coils of the helix. This can properly be called a non-directional helix, and is very similar to a spiral telephone cord that goes bad when one of its coils becomes non-directional with respect to the other.

As shown in FIGS. 1 and 2, the preforming device of the present invention mainly consists of a short filament fiber conveying device 1, a scraping device 2, and a stripping device 3, and supplies short filament fibers as needed. It is equipped with a device 45.

The conveying device 1 is configured to attach a molded article to one side of a molded article to be preformed on an endless belt (such as a slatted endless belt) or a regular endless belt provided between a chain 6 stretched between sprockets 4 and 5, for example. shape (for example, the 12th
When a molded body as shown in the figure is to be preformed, it consists of a molded object (a shape corresponding to the surface S) (forming lower mold), and any one of the sprockets (for example, sprocket 4) is formed. ) is linked by a pulley 7 to a pulley 10 of a transmission 9 via a belt (or chain) 8.
Thus, another pulley 11 of the transmission 9 is configured to be coupled to a motor 13 via a belt (or chain) 12.

A scraping device 2 and a stripping device 3 are provided on the conveying device 1. For example, as shown in FIG. 1, a support frame 14 that supports the scraping device 2 and the stripping device 3 at its upper portion is supported at its lower end by the bottom frame 15 of the conveying device 1 via a vertically movable mechanism 16. The upper part is located above the transport device 1. Of course, if the recessed structure to be scraped is in the form of a groove with a constant depth, the support frame 14 may be directly supported by an appropriate portion of the conveying device 1, such as the bottom claim 15. A shaft 18 is rotatably supported on the bearing 17 of the support frame 14, and a rotating body 19 is fixed to the shaft 18, and the shaft 18 is connected to the shaft 18 via a belt 21 by a pulley 20 coaxially attached. A power source (for example, a motor, a transmission, etc.) 22 is interlocked. Further, a shaft 24 is rotatably supported on another bearing 23 of the support frame 14.
A rotating body 25 is fixed to the shaft 24, and a pulley 26 coaxially attached to the shaft 24
It is linked to a power source (for example, a motor, a transmission, etc.) 28 via a belt 27. Note that the power sources for the rotating body 19 and the rotating body 25 do not necessarily need to be separate drive systems. Furthermore, the rotational direction of the rotary body 19 and the rotary body 25 are not particularly limited so that the rotation direction of the rotary body 19 is opposite to the filament short fiber conveying direction of the filament short fiber conveying device 1. Although the driving mechanism may be in the forward direction or in the reverse direction, it is preferable that each drive mechanism is configured so that the driving mechanism is in the opposite direction.

As will be described later, a large number of needle-like objects are provided on the outer surfaces of the rotating body 19 of the scraping device 2 and the rotating body 25 of the stripping device 3, respectively. Both rotating bodies are arranged so that the needle-like object and the needle-like object of the rotating body 25 of the stripping device 3 can interfere with each other. The degree of interference varies depending on the shape of the needle-like object, the angle of interference, the radius of curvature of the rotating body, etc., but the depth of interference at the maximum interference position is usually 1 to 0.1 times the height of the needle-like object of the scraping device. It is preferably configured to be about 0.8 to 0.2. On the other hand, the vertically movable mechanism 16 is composed of mechanisms such as a screw jack, cam, rack, and pinion, hydraulic cylinder, and crank. 31 and rotation transmission mechanisms (eg, bevel gears, worm gears, etc.) 32 and 33. Further, a suction duct 3 is connected to a suction device (not shown) in the scattering direction of the short filament fibers to be stripped by the stripping device 3.
4 are provided. Note that the suction device does not cause the scattered short filament fibers to fall onto the filament short fiber aggregate on the conveying device 1, and preferably uses another mechanism, such as a plate-like object or a belt conveyor, to return the scattered short filament fibers to a supply mechanism for the filament short fibers. This can be replaced by arranging a vibrating feeder or the like in the scattering direction of the short filament fibers.

Furthermore, the rotating body 19 of the scraping device 2 and the rotating body 25 of the stripping device 3
The scraping can be performed by rotationally displacing the filament around an axis parallel to the direction of conveyance of the filament to change the angle, or it is also possible to change the scraping position by displacing it left and right in a direction transverse to the direction of conveyance of the filament. In this way, it is also possible to scrape off the side portions of the filament short fiber aggregate. This is, for example, the first
It is constructed using the structure shown in Figure 3.
That is, as shown in FIG. 13, a first support 14a that supports the scraping device 2 and the stripping device
A shaft 10 fixed to the support 14a and extending in a direction parallel to the filament transport direction.
1, it is rotatably supported on the bearing 102 of the second support body 14b. The shaft 101 is connected to a drive mechanism 103 installed on a drive unit support 102 extending to a second support 14b, and is connected to a flexible joint, as necessary.
They are linked via universal joints, etc. On the other hand, the second
The support body 14b has a guide groove 105 of the second support body 14b attached to a guide rail 104 provided at the upper end of the support frame 14c, which is supported at the lower end by the bottom frame of the transport device 1 via a vertically movable mechanism 16. are fitted and supported on the support frame 14c so as to be movable left and right. Further, the third support body 14c has a left-right movable mechanism 106 such as a screw jack whose end portion is fixed to the second support body 14b.
Set up.

There are various types of needle-like objects that are erected on the outer surface of the rotating body 19 of the scraping device 2 and the outer surface of the rotating body 25 of the stripping device 3.
For example, clothing, metallic, take-in (horizontal needle),
There are Porkyupine etc. As shown in Figs. 3 and 4, the needle cloth is a material in which metal needles 36 are implanted at an appropriate density on a base layer 35 made of cotton cloth, linen cloth, rubber sheet, leather, etc., laminated with appropriate adhesive. In addition to the linear shape shown in the figure, there are dogleg shaped shapes as shown in FIG. 4, and various other shapes.
In the case of the scraping device 2, the needle 36 has a diameter of approximately
0.2 to 2 mm, preferably 0.2 to 1 mm, length of base layer 3
Usually 1 to 30 mm, preferably 2 to 15 mm from the surface of 5.
In addition, the planting density of the needles 36 is 4 to 6 needles/cm ² ,
Preferably it is 2 to 5 pieces/cm ² . On the other hand, in the case of the stripping device 3, the thickness of the needle 36 is approximately
0.2 to 3 mm, preferably 0.2 to 2 mm, length of base layer 3
Usually 1 to 40 mm, preferably 2 to 30 mm from the surface of 5.
In addition, the planting density of the needles 36 is 4 to 15 needles/cm ² ,
Preferably it is 2 to 10 pieces/cm ² .

When the clothing is attached to the rotating body 19 of the scraping device 2, the angle of the needle 36 with respect to the tangent to the outer circumference of the rotating body varies depending on the length of the needle and the density of implantation, but it is usually the case that the needle is straight when viewed from the opposite direction of rotation. 45° to 100°,
Preferably it is 70-90°. On the other hand, the needle 36 when the clothing is attached to the rotating body 25 of the stripping device 3
The angle varies depending on the length of the needle and the implantation density, but it is usually 45 ~
100°, preferably 60-90°. Therefore,
When the rotating body 19 and the rotating body 25 rotate in opposite directions, the needle-like objects of the rotating body 19 and the needle-like objects of the rotating body 25 are different from each other at their maximum interference position, depending on the needle length, implantation density, and interference. The needles interfere at an angle of about 90 to 180 degrees, preferably 100 to 170 degrees, although this varies depending on the depth of the needle.

Metallic is made by tightly wrapping a metal serrated band 37 in the circumferential direction on the surface of the rotating body 19 or 25 as shown in FIG. 5-20mm, preferably 7-20mm
15 mm, the height of the saw teeth 38 is 1-5 mm, the tooth spacing is 2-8 pieces/cm, while in the case of the stripping device 3 the tooth spacing is about 3-20 mm, preferably 7-15 mm, the saw teeth 38 The height of the sawtooth is 1 to 8 mm, and the sawtooth spacing is 1 to 9 pieces/cm. Furthermore, as shown in FIG. 6, a substrate 39 with a large number of needles 40 protruding from it, or a fiber-reinforced rubber substrate 41 with a large number of teeth 42 protruding from it, as shown in FIG. 7, may also be used. As shown in FIG. 8, Teikain is made by cutting and raising a band-shaped substrate 43 to form teeth 44, and the rotating body 19
Or it is used by tightly wrapping it in the circumferential direction on the surface of 25.

However, among these needle-like objects, the scraping device 2
The needle-like object of the rotating body 19 of the stripping device 3 is a clothing having dogleg-shaped needles as shown in FIG. Particularly preferred are clothings with needles of .
In addition, the needle-like objects of the scraping device 2 and the needle-like objects of the stripping device 3 should be arranged so that they do not come into direct contact with each other, especially if the materials constituting both needles or teeth have high rigidity. It is desirable that

The shape of the rotating body 19 of the scraping device 2 is arbitrarily selected depending on the concave shape of the molded body to be scraped, and may be cylindrical, barrel-shaped, abacus bead-shaped, spherical, egg-shaped, gourd-shaped, etc. On the other hand, the rotating body 2 of the stripping device 3
The shape of 5 is appropriately selected according to the shape of the rotary body 19 of the scraping device 2 so as to interfere with the needle-like objects on the entire outer peripheral surface of the rotary body 19 of the scraping device 2. Further, the length and implantation density of the needles of the rotating body 19 of the scraping device 2 do not necessarily have to be uniform, and may be partially changed. In this case, as well, the stripping device The needle-like material of the second rotating body 25 can also be changed accordingly. Further, the number of rotating bodies 19 of the scraping device 2 does not necessarily have to be one, and a plurality of rotating bodies 19 can be used depending on the desired shape. Additional grooves may also be formed using a body (not shown). In this case as well, the rotating body 25 of the stripping device 3 is replaced by the rotating body 19 of the scraping device 2.
Further, if the rotation of the other rotating body is within the circumferential speed range of the method of the present invention, a stripping device is similarly arranged for this rotating body.

The preforming device is provided with a short filament fiber feeding device 45 as shown in FIG. 2, if necessary. The supply device 45 includes, for example, a filament supply conveyor 46 and a cotton opening machine 47, as shown in FIG.

Next, a method for preforming a sheet cushioning agent using the above-mentioned apparatus will be described. Short fibers F of synthetic fiber filaments having thick denier three-dimensional curls as shown in FIG. 13 are sent to an opening machine 47 using a conveyor such as a belt conveyor 46 as shown in FIG. from there onto the conveying device 1. The supplied short filament fibers F are deposited on the conveying device 12 and then conveyed toward the scraping device 2.

On the other hand, the power of the motor 13 is changed to a predetermined rotational speed by the transmission 9 and then transmitted to the pulley 7 by the belt 8, and the rotational force thereof rotates the sprocket 4 and moves the endless belt 6 of the conveying device 1. This conveyance speed is usually set to about 0.3 m/min to 2 m/min. In this way, the filament short fiber aggregate is conveyed to a position where it comes into contact with the scraping device 2, and the belt 2 is moved by the motor 22.
A rotating body 1 rotated by the power transmitted by 1.
A predetermined portion is scraped off by the needle-like object 9 on the outer surface. At this time, the rotational peripheral speed of the rotating body 19 is 0.1
m/min~15m/min, preferably 0.1m/min~
10 m/min, and particularly desirably, the relative rotational peripheral speed to the filament short fiber aggregate to be conveyed is in the range of 0.15 m/min to 17 m/min. On the other hand, the short filament fibers entangled in the needles of the rotor 19 scraped off by the rotor 19 are stripped by the needles on the outer surface of the rotor 25 of the stripping device 3, and are thereby scraped off. The short filament fibers are removed by suction through the suction duct 34. The rotating body 25 is rotated by the power transmitted from the motor 28 by the belt 27, and the peripheral speed of rotation of the rotating body 25 varies depending on the shape of the needle, the radius of curvature of the rotating body, the direction of rotation, etc. Usually about 20 to 10,000%, preferably about 20 to 10,000% more than the rotational peripheral speed of the rotating body 19 of the removing device 2.
Rotate at a circumferential speed about 30 to 7000% faster.

Therefore, the scraping device 2 and the stripping device 3
The support frame 14 on which the
The rotation of the motor 29 is transmitted through the rotation transmitting mechanisms 32 and 33, and this rotation changes the position up and down, so that the height of the rotating body 19 of the scraping device 2 is determined, and the necessary depressions are formed in the filament short fiber aggregate depending on the height. Further, the height of the rotating body 25 of the stripping device 3 is also the same as that of the rotating body 19 of the scraping device 2.
The desired stripping can be performed even if the scraping device 2 moves up and down.

The filament short fiber aggregate preformed in this way is further passed through a rubbing device, if necessary, and rubbed with a bar or the like to give it a predetermined bulk density. The filament short fiber aggregate preformed in this way is usually 0.002 to 0.2
It has a bulk density of g/cm ³ , preferably 0.005 to 0.1 g/cm ³ .

The filament short fiber aggregate molded body preformed in this way is transported by a transport device using the method described in Japanese Patent Application No. 53-163086, and immersed in the adhesive liquid in the adhesive liquid tank. Thereafter, it is pulled up vertically or almost vertically by another conveying device. At this time, the surface tension of the liquid can reduce the dripping to some extent. During this time, excess adhesive adhering to the filament short fiber aggregate molded body flows down inside the molded body. Next, the filaments are passed through a high-frequency dielectric heating device to evaporate adhering adhesive moisture or solvent in a very short period of time, and at the same time the filaments are cured to some extent by the heat generated at the time, thereby bonding each contact point between the filaments. After further movement by a conveying device, the obtained filament lock material is cut into predetermined dimensions. If there is a risk that the filament short fiber aggregate molded object will break when pulled up in the vertical direction, spray dry a small amount of adhesive liquid onto the horizontally running molded object before dipping. Temporary adhesion may also be performed.

Typical adhesives include synthetic rubbers such as styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, urethane rubber, etc.
These include natural rubber, vinyl acetate adhesives, cellulose acetate adhesives, acrylic adhesives, etc., and are used in the form of latex, emulsion, solution, etc., preferably in the form of latex or emulsion. The amount of adhesive applied is usually 10 to 300% based on solid content.
g/100g - filament, preferably 50-250
g/100g-filament.

The filament short fiber aggregate coated with adhesive passes through a heating device, but two rows of needles are inserted alternately at both the upper and lower ends of the holding guide, and while the aggregate is being pulled upward. It prevents it from collapsing or tearing, and at the same time prevents leakage of high-frequency radio waves.

The filament short fiber aggregate molded body passes through a high-frequency dielectric heating device, and the adhesive liquid is heated and dried by high frequency waves of 1 MHz to 300 GHz, preferably 10 MHz to 30 GHz, imparting shapeability to the filament short fiber aggregate molded body. Sufficient power density to give, e.g. 0.1~
Electric power of 10 kwh/cm ³ , preferably 0.5 to 5 kwh/cm ³ is applied to dry and remove solvent heat such as moisture, and bond the filaments together. Therefore, even if the molded filament short fiber aggregate is pulled up, it will not be cut midway due to its own weight and the weight of the attached adhesive. Furthermore, if necessary, it is passed through a normal drying oven and dried at a temperature of 80 to 200℃, preferably 100 to 160℃, using hot air, infrared rays, heated steam, etc.
Post-curing is carried out by heating for ~60 minutes, preferably 15-40 minutes, and then cutting into predetermined dimensions using a cutting device.

If even better rebound properties are required for the cushion material, the short filament fiber aggregate block is needled using a needling device before applying the adhesive. In the needling method, needles having at least one barb at the tip are used to prick the needle an appropriate number of times at an appropriate needle density using, for example, the apparatus and method disclosed in Japanese Patent Application No. 53-46373. The diameter and length of this needle are determined depending on the purpose, but it is usually 1.8 to 3.6 mm in diameter and 50 to 2000 mm in length.
and usually has 4 to 12 barbs per needle. Specifically, for example, while supporting the lower surface of a preformed filament short fiber aggregate block on a belt conveyor with a flat plate, such as a perforated plate, a slit plate, or a slit-shaped conveyor, For example, by moving the needle fixture up and down, with or without using a perforated plate, a slit plate, etc., the filament short fiber aggregate block is needled at an appropriate density. the needles are mounted in one or more rows at desired intervals in a needle fixture, the mounting being effected by rotation of a crankshaft actuating a crank connected to the shaft and the fixture; During this time, the short filament fiber aggregate block is run at such a speed that the needling is performed at appropriate intervals. The needle density can be varied depending on the purpose of use of the final cushion material and the desired compression elasticity, and the higher the desired compression elasticity, the smaller the needle spacing, but it is usually 1 to 100 needles/needle density. 100cm ² , preferably 4 to 50 pieces/100cm ² . After needling in this manner, adhesive treatment and drying treatment are performed as described above.

Furthermore, instead of the above-mentioned needling, the filament may be compressed by a rolling method, a rubbing method, or the like. The rolling method is carried out, for example, by pressing a mounting plate on which a large number of needles are set up at predetermined intervals from above and below the filament, and then compressing at least one of the mounting plates while rolling.

Effects of the Invention As described above, in the method for preforming cushion materials of the present invention, an aggregate of short filament fibers having three-dimensional curls is supplied to a conveying device, and while the conveying device is moved, a large number of needle-like objects are erected. In the preforming method for a cushion material, the method comprises rotating a rotary body, and bringing the needle-like object into contact with a filament short fiber aggregate and scraping off a predetermined portion to form a cushion material into a predetermined shape. The speed is 0.1m/min to 15m/min, and the device is
A conveying device for a filament short fiber aggregate having three-dimensional curls, a scraping device comprising a rotating body provided on the conveying device and having a large number of needle-like bodies erected thereon, and a needle-like object of the scraping device Since the stripping device is made up of a rotating body made up of a large number of needle-like objects that can interfere with the stripping device, it is difficult to use well-known mechanical methods such as pressing using a rigid body because the stripping device is fluffy and cotton-like. The concave structure of the filament short fiber aggregate, which was extremely difficult to form with other methods, can be easily formed, and the boundary line and boundary angle at the boundary between the scraped part and the non-scraped part can be easily formed by rotating the scraping device. This method is more precise and precise than the conventional method in which the body is rotated at a relatively high speed, and can easily form a predetermined shape, especially when the recessed shape of the cushion material requires deep scraping. It is.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the apparatus for preforming cushion materials according to the present invention, FIG. 2 is a schematic sectional view of an embodiment of the apparatus for preforming cushion materials according to the present invention, and FIGS. 3 to 7 8 is a perspective view of the needle used in the device of the present invention, FIG. 9 is a partial perspective view of a double-twisted filament, and FIG. 10 is a three-way view. 11 and 12 are schematic diagrams of a cushion material preformed by the method of the present invention, and FIG. 13 is a front view of a three-dimensional curl filament, and FIG. FIG. 3 is a perspective view showing the supporting means of the stripping device. DESCRIPTION OF SYMBOLS 1... Conveying device, 2... Scraping device, 3... Stripping device, 14... Support frame, 16... Vertical movable device, 19, 25... Rotating body, 45... Filament short fiber supply device.

Claims (1)

[Scope of Claims] 1. An aggregate of short filament fibers having three-dimensional curls is supplied to a conveyance device, and while the conveyance device is moved, a rotating body including a large number of acicular objects is rotated, and the A method for preforming a cushion material in which a needle-like object is brought into contact with an aggregate of filament short fibers and a predetermined portion is scraped off to form a predetermined shape, wherein the circumferential rotational speed of the rotating body is 0.1 m/min to 15 m/min.
1. A method for preforming a cushion material, characterized in that the preforming speed is m/min. 2. The relative rotational circumferential speed of the rotating body with respect to the transported filament short fiber aggregate is 0.15 m/min to 17
2. The method of preforming a cushion material according to claim 1, wherein the preforming method is m/min. 3. The short filament fibers scraped off by the rotating body are stripped by another rotating body having needle-like objects that can interfere with the needle-like objects of the rotating body. 1st or 2nd
A method for preforming the cushion material described in Section 1. 4. The method of preforming a cushion material according to claim 3, wherein the peripheral rotational speed of the other rotating body is about 20 to 10,000% faster than the peripheral rotational speed of the rotating body. 5. Claim 3, wherein the rotating shafts of the rotating body and the other rotating body rotate while moving up and down.
A method for preforming a cushion material according to item 1 or 4. 6. A conveying device for filament short fiber aggregates having three-dimensional curls, a scraping device consisting of a rotating body provided on the conveying device and having a large number of needle-like bodies erected, and a needle-like body of the scraping device. A preforming device for cushioning material, which is equipped with a stripping device consisting of a rotating body having a large number of needle-like objects erected and capable of interfering with objects. 7. The cushioning material preforming device according to claim 6, wherein the rotating shafts of the rotating bodies of the scraping device and the stripping device are configured to be able to move up and down. 8. The device for preforming a cushion material according to claim 6 or 7, wherein the needles of the scraping device and the stripping device are made of clothing, metallic, Teikane, or Porkypine. 9 The rotating body of the scraping device and stripping device is
A preforming device for a cushion material according to any one of claims 6 to 8, wherein a plurality of the devices are provided.