JPH03180556A - Production of glass fiber mat and apparatus therefor - Google Patents

Abstract

PURPOSE:To obtain the subject product capable of providing the final product such as a bumper beam having stabilized performance by orienting unidirectional glass fiber bundles parallel at a regular interval in the width direction of a mat on a nondirectional glass fiber layer according to a specific method. CONSTITUTION:Glass fiber bundles 12 are initially shaken down on a horizontally arranged belt conveyor 10 to form a nondirectional fiber layer 13, which is then dried in a dryer 14. Unidirectional fiber bundles 15 are fed onto the dried nondirectional fiber layer 13 with a unidirectional fiber bundle feeder such as warp beam 16 and the unidirectional fiber bundles 15 are simultaneously guided at a regular interval parallel in the width direction. The unidirectional fiber layer 15 is laminated at a uniform interval parallel on the nondirectional fiber layer 13. Both laminated layers 13 and 15 are then fed to a needle 18 and needled to form a glass fiber mat 19, which is subsequently taken out with a delivery roller 20.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for manufacturing a glass fiber mat by needling laminated unidirectional fiber layers and non-directional fiber layers (random fiber layers). and its equipment.

[Conventional technology]

A conventional glass fiber mat manufacturing apparatus is shown in FIG. In this case, first, at the starting end of the mat production line, a directional fiber bundle 2 is fed onto a belt conveyor 3 from a warp beam l on which a glass fiber bundle (cake, roving or yarn) is rewound to form a unidirectional fiber layer. A non-directional fiber layer 5 is laminated thereon by shaking off continuous glass fiber bundles 4 in a random manner. This laminate of the unidirectional fiber layer and the non-directional fiber layer 5 is then passed through a dryer 6 to be dried, and sent to a needler 7 where it is entangled by needling. . Thereby, the unidirectional fiber layer and the non-directional fiber layer 5 are integrated into a glass fiber mat.

This glass fiber mat is used, for example, to produce an FRTP stampable sheet (original plate).

This stampable sheet can be manufactured using known methods such as those disclosed in Japanese Patent Publication No. 63-15135, Japanese Patent Application Laid-Open No. 61-112642, and the periodical "Plastics Age", page 194 (published in April 1989). The stampable sheet is manufactured by impregnating a glass fiber mat with molten resin.The stampable sheet is further cut into a predetermined size and number of sheets, and then stamped to form a sheet with high strength in one direction, such as on an automobile bumper beam. and molded into molded products with high elasticity.

[Problem to be solved by the invention]

The final molded product, such as a bumper beam, must have stable performance (such as flexural fracture strength). For this purpose, it is necessary that the glass fiber bundles of the unidirectional fiber layer are correctly oriented in the direction in which the strength of the molded product is required. This is similarly necessary for the stampable sheet, which is the original plate of the molded product, as well as for the glass fiber mat used to produce the stampable sheet. In other words, when the unidirectional fiber layer and the non-directional fiber layer are entangled by needling to form a glass fiber mat, the glass fiber bundles that make up the unidirectional fiber layer are spaced as uniformly as possible in the width direction of the mat. They must be arranged parallel to each other (without meandering). This arrangement uniformity influences the performance of the molded product.

However, in the conventional method, the glass fiber bundles are arranged uniformly in the width direction of the mat at the entrance of the conveyor, but the non-directional fiber layer is shaken off and superimposed on the unidirectional fiber layer and dried. When passing through the aircraft, the arrangement is disturbed by the force of the hot air. Furthermore, when the sheets travel on the conveyor and reach the needler, the arrangement is further disturbed by the vibrations of the needler. Glass fiber mats needled under such conditions have very uneven arrangement of glass fiber bundles that make up the unidirectional fiber layer, so stampable sheets made using such mats cannot be stably produced. A molded product with the same performance cannot be obtained.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and provide a method and apparatus for manufacturing a glass fiber mat in which glass fiber bundles are arranged in parallel at regular intervals in the width direction of the mat. .

[Means to solve the problem]

This purpose is to form a non-directional fiber layer by shaking off a glass fiber bundle onto a horizontally arranged belt conveyor, drying this non-directional fiber layer in a dryer, and drying the non-directional fiber layer in a dryer. The fiber bundle supply device supplies the unidirectional fiber bundles onto the dried non-directional fiber layer to laminate the unidirectional fiber layer, and at this time, the unidirectional fiber bundles are spaced at regular intervals in the width direction. The laminated unidirectional fiber layer and non-directional fiber layer are fed to a needler and needled to form a glass fiber mat, and this glass fiber mat is carried out by a delivery roller. This is achieved by

Further, in the invention of an apparatus for manufacturing a glass fiber mat by needling laminated unidirectional fiber layers and non-directional fiber layers, a horizontally arranged belt conveyor and glass fibers are placed on the belt conveyor. A non-directional fiber bundle supply device that shakes off the bundle to form a non-directional fiber layer, a dryer placed in front of this non-directional fiber bundle supply device, and a glass fiber bundle that supplies the glass fiber bundle onto the non-directional fiber layer. A unidirectional fiber bundle supply device is placed in front of the dryer to form a unidirectional fiber layer, and the unidirectional fiber bundles supplied from the unidirectional fiber bundle supply device are spaced at regular intervals in the width direction. a comb-shaped guide for guiding the unidirectional fiber bundle in parallel at the unidirectional fiber bundle supply device; a means for applying a constant tension to the unidirectional fiber bundle supplied from the unidirectional fiber bundle supply device; , a needler disposed in front of the unidirectional fiber bundle supply device for entanglement by needling, and a delivery roller disposed in front of the needler for carrying out the glass fiber mat. This is achieved by being prepared.

In this case, it is desirable that the unidirectional fiber bundle supply device is a warp beam that winds up the glass fiber bundle. Furthermore, the unidirectional fiber bundle feeding device comprises a pipe and a guide for guiding the glass fiber bundle from the roving, yarn or cake, and a rotationally driven feed roller for feeding the glass fiber bundle onto the non-directional fiber layer. Furthermore, the means for applying a constant tension to the unidirectional fiber bundle is an electromagnetic clutch attached to the warp beam or feed roller, and this electromagnetic clutch rotates intermittently.
It is desirable to operate in synchronism with the rollers and apply tension to the unidirectional fiber bundles due to their braking action. Further, the means for applying a constant tension to the unidirectional fiber bundle is a rotational drive device for the warp beam or feed roller, and this rotational drive device rotates at approximately the same circumferential speed as the average take-up speed of the delivery roller that rotates intermittently. It is desirable to apply tension to the unidirectional fiber bundle. Furthermore, it is desirable that the means for applying a constant tension to the unidirectional fiber bundle be a tension roller arranged so as to be lightly pressed against the unidirectional fiber bundle.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a glass fiber mat manufacturing apparatus according to the present invention. In FIG. 1, 1.10.11 is a belt conveyor arranged approximately horizontally. Starting end range of belt conveyor 10 (range on the right in Fig. 1)
, the continuous glass fiber bundles 12 are randomly shaken off by a non-illustrated non-directional fiber bundle supply device to form a non-directional fiber layer (random fiber layer) 13. A plurality of non-directional fiber bundle supply devices (four in the illustrated embodiment) are arranged at regular intervals in the conveyance direction of the conveyor, and drop the continuous glass fiber bundles 12 in a spiral shape while reciprocating at a predetermined speed in the width direction. (For example, the special public interest
(See Publication No. 60). The continuous glass fiber bundle 12 is, for example, a bundle of 400 filaments each having a diameter of 23 μm,
For example, the weight per unit area of the non-directional fiber layer 13 is 44
It is shaken off so that it becomes 0g/nf.

The non-directional fiber layer 13 thus formed is conveyed by a belt conveyor 10 and passes through a dryer 14. This dryer 14 blows hot air at about 50'C onto the non-directional fiber layer 13 to dry it.

The non-directional fiber layer 13 is subsequently transferred to the belt conveyor 11. In the end region of this belt conveyor 11, a unidirectional fiber bundle 15 is fed from a warp beam 16 onto a non-directional fiber layer 13.

The warp beam 16 includes, for example, a glass fiber bundle (cake,
Roving or yarn) is 2.2 + 11 in advance! 4m to
540 pieces were re-wound at a pitch of m, approximately 200 meters long. The warp beam 16 is rotatably supported by its shaft, and is equipped with an electromagnetic clutch (not shown) for braking the rotation. This electromagnetic clutch operates in synchronization with a delivery roller (described later) that rotates intermittently.
It serves to stretch the unidirectional fiber bundle 15. However, the warp beam 16 can also be rotated by a rotary drive. In this case, the warp beam 16 rotates at approximately the same speed as the average take-up speed of the intermittent rotating delivery rollers and likewise serves to tension the unidirectional fiber bundle.

The unidirectional glass fiber bundle 5 drawn out from the warp beam 16 is fed onto the non-directional fiber layer 13 after passing through a comb-shaped guide 17 . The comb-shaped guide 17 preferably has a variable pitch. One unidirectional fiber bundle 15 may be passed through the comb-shaped guide 17, or two unidirectional fiber bundles 15 may be passed through the comb-shaped guide 17.Since the comb-shaped guide 17 itself is known in the field of the textile industry, it will be explained in detail here. do not.

The laminated unidirectional fiber layer and non-directional fiber layer 13 are then supplied to a needler 18, and needling is performed so that the needles enter from the side of the unidirectional fiber layer. The layers are intertwined and consolidated into a fiberglass mat. Since this needler 18 itself is well known, it will not be described in detail here.

A delivery roller 20 for conveying the glass fiber mat 19 is provided on the exit side of the needler 18. This delivery roller 20 is driven to rotate intermittently.

In the case of the glass fiber mat manufacturing apparatus configured as described above, the warp beam 16, which is a feeding device for the unidirectional fiber bundle 15, is disposed between the dryer 14 and the needler 18. Furthermore, the comb-shaped guide 17 does not disturb the arrangement of the unidirectional fiber bundles due to hot air blowing.
Since the unidirectional fiber bundle 15 is guided through the unidirectional fiber bundle 15 and tension is applied to the unidirectional fiber bundle 15, the unidirectional fiber bundle 15 is guided and fed parallel to each other at a constant interval, and even when subjected to the vibration of the needler 18, it does not meander and remains straight. Non-directional fiber IJ1
Arranged on 3.

In the case of applying tension by an electromagnetic clutch, when the delivery roller 20 is rotating, the electromagnetic clutch weakens the braking force and applies a constant tension to the unidirectional fiber bundle 15, and when the delivery roller 20 stops, the electromagnetic clutch applies a constant tension to the unidirectional fiber bundle 15. The braking force of the electromagnetic clutch increases and the rotation of the warp beam 16 is stopped.

When tension is applied to the warp beam 16 by the rotational drive device, the warp beam is rotationally driven at approximately the same speed as the average take-up speed of the delivery roller, which rotates intermittently, so that while the delivery roller 20 is stopped, Although the unidirectional fiber bundle 15 becomes slack, it is tightened when the delivery roller rotates again, so there is no problem in uniformly arranging the unidirectional fiber bundle 15.

Another device for applying tension to the unidirectional fiber bundle 15 is shown in FIG. This device consists of a tension roller 22 biased by a spring 21 so as to be lightly pressed against the unidirectional fiber bundle 15 drawn from the warp beam 16. In this case, the tension roller 22 may be rotatably mounted on a bearing, or may not rotate. Furthermore, the tension may be applied to the unidirectional fiber bundle 15 only by the weight of the tension roller without using the spring 21.

3 to 12 show modified examples of the unidirectional fiber bundle supply device. In the case of the warp beam 16 as a unidirectional fiber bundle supply device shown in FIG. 1, the process involves first preparing a large number of rovings, cakes, and yarns, aligning the tension, arranging them in parallel, and rewinding them onto the warp beam. , which is expensive and uneconomical. Furthermore, the production of glass fiber mats is also limited to the length of the glass fibers wound around the warp beam 16 (eg 200 m). warp beam 16
Once the fiberglass bundle is used up, production must be stopped and the warp beam replaced. The replacement work is 540
The glass fiber bundles of the book must be retied one by one to pass through the comb-shaped guide, and the length must be adjusted to ensure constant tension. This series of tasks takes several hours,
Very inefficient.

Modification 16 of the unidirectional fiber bundle supply device shown in FIGS. 3 to 12
' In order to eliminate the above-mentioned drawbacks of the warp beam 16,
The roving, cake, and yarn are fed directly to the needler 18 without being re-wound onto the warp beam.

The unidirectional fiber bundle supply device 16' includes substantially roving,
A shelf 24 on which a cake or yarn roll 23 is placed, a rigid straight pipe 25 for guiding a glass fiber bundle (unidirectional fiber bundle) 15 drawn from the roving, cake or yarn roll 23, and this pipe. A flexible pipe 26 connected to 25 and this flexible pipe 2
6 and a feed roller 27 to which the glass fiber bundle is supplied.

Shelves 24 carrying rolls 23 of roving, cake or yarn are arranged remote from the mat production line, for example in a V-shape. The fiberglass bundle 15 is drawn from a roll 23 of roving, cake or yarn and passed through a stainless steel guide rod 2, as shown in FIGS.
8 and pass through the hole in the guide plate 29 with the two wires together. This guide plate 29 is fixed to the side surface of the shelf 24 with screws or the like, and titanium guides 30 are attached to the holes thereof.

Next, the glass fiber bundle 15 is guided into a straight pipe 25 made of hard vinyl chloride that has a cap 31 and a titanium guide 32 attached to its tip (see FIG. 6).

If the individual glass fiber bundles are not isolated by the pipe 25, the glass fiber bundles 15 will become taut or sag when pulled out, and the glass fiber bundles will not be able to separate from each other. They intersect and become entangled. As a result, the glass fiber bundles 15 advance while rubbing against each other, single thread breakage occurs, fuzz is generated, and finally the glass fiber bundles 15 are cut. The vinyl chloride pipe 25 isolates the glass fiber bundles 15 from each other and serves to prevent such troubles from occurring.

Furthermore, when the glass fiber bundle 15 moves up and down, the tension applied to the glass fiber bundle also changes. In other words, when the glass fiber bundle sags greatly, the tension becomes large, and when the sagging is small, the tension also becomes small. However, as described above, when the glass fiber bundle 15 is passed through the straight pipe 25 and taken out, the range in which the glass fiber bundle 15 moves up and down can be minimized, and fluctuations in tension can also be reduced.

Suitable materials for the pipe 25 for these purposes include metal or plastic, but metal makes the pipe heavier and the frame for hanging it must also be strong, and glass fiber It is necessary to select a material that is resistant to corrosion due to peroxides contained in the binder of the bundle. On the other hand, if it is made of plastic, a hard plastic with no tackiness is lightweight and can be easily mounted, and there is no need to worry about corrosion. As long as the inner wall surface is smooth, a pipe made of fluorine resin, olefin resin, vinyl chloride, ABS, PC, acrylic, etc. can be used. In particular, hard vinyl chloride pipes, which are widely available on the market, are suitable from the viewpoint of cost and performance.

The glass fiber bundle exiting the straight pipe 25 passes through a flexible pipe 26 whose inner wall surface is gently curved and corrugated, and is guided to a feed roller 27 . The role of the flexible pipe 26 is to gently change the direction of the glass fiber bundle 15 with as little wear as possible. For this purpose, it is desirable that the inner wall surface of the flexible pipe 26 is corrugated so that the contact area between the glass fiber bundle 15 and the pipe 26 is small. 7a to 7e show examples of flexible pipes 26. FIG. In the case of FIG. 7a, the waveforms are formed independently in a ring shape and are formed at regular intervals. In the case shown in FIG. 7b, the corrugation is formed in the shape of one or more threads.

In the one shown in FIG. 7c, an independent ring-shaped protrusion is formed on the inner wall surface. In the one shown in FIG. 7d, the protrusion is formed in the shape of one or more threads. In the one shown in FIG. 7e, a spring is inserted and fixed into a flexible pipe.

The material of the flexible pipe 26 is preferably the same as that of the straight pipe 25. In other words, it should be lightweight and have a smooth inner wall surface. For example, the product name ``5 RAFREKI@SS, MFS-164'' manufactured by Mirai Kogyo Co., Ltd., which is widely available on the market as a wire protection tube, is suitable.

The glass fiber bundle 15 passes from the flexible pipe 26 to the inlet guide 35 (referred to as an inlet guide because it is located on the inlet side with respect to the feed roller 27) and then to the feed roller 27.
is supplied to As shown in FIG. 8, this entrance guide 35 is attached to an iron pipe 36 with an inner diameter equal to the outer diameter of the flexible pipe 26, an iron plate 37 to which this iron pipe is welded, and a guide holder 38 to the opening of the iron pipe 36. It consists of a titanium guide 39 made of aluminum. The iron plate 37 extends over the entire length of the feed roller 27, which will be described later, and has an arcuate rectangular shape. This iron plate 37 has a ninth
As shown in the plan view of the figure, a large number of iron pipes 36 are attached to the iron plate 3.
7 are arranged and fixed while being shifted from each other in the width direction and longitudinal direction. Each iron pipe 36 has a flexible pipe 26
is inserted and fixed.

The glass fiber bundle 15 passes through a flexible pipe 26, a titanium guide 39, and three rubber-coated rollers 41, 4.
It is fed to a feed roller 27 consisting of 2.43 mm. At this time, if the iron plate 37 is flat, the center line 40 (see FIG. 8) of the entrance guide 35 (flexible pipe 26, titanium guide 39, or iron pipe 36) and the tangent line of the first roller 41 of the feed roller 27 Since these do not match, the glass fiber bundle 15 runs while being rubbed by the edge of the titanium guide 39. Then, the larger the contact angle at the edge of the titanium guide 39, the more fluff will be generated, and the generated fluff will adhere to the traveling glass fiber bundle 15 and feed roller 27.
It also migrates to the surface of the glass fibers, generating fuzz one after another, and eventually cutting the glass fiber bundles and causing them to wrap around the feed roller. To prevent such troubles, the entrance guide 35
The center line 40 (law LA) of the feed roller 27 is
It is arranged so as to coincide with the tangent line of the 0-ra 41 (see FIG. 10 and FIG. 10A). In this way, the contact angle of the glass fiber bundle 15 at the edge of the titanium guide 39 becomes small, and fluff hardly occurs.

The glass fibers exiting the entrance guide 35 are transferred to the titanium guide 39.
However, since the pitch of each glass fiber bundle 15 is very narrow at 8M, the glass fiber bundles 15 may be twilled between the titanium guide 39 and the feed roller 27 as shown on the right side of FIG. There is. When the glass fiber bundle 15a and the glass fiber bundle 15b contact the feed roller 27 while still being twilled, the glass fiber bundle 15a and the glass fiber bundle 15b remain overlapped and the feed roller 27
(for example, the 10th roller 41 and the 20th roller 42)
(see FIG. 12), then the glass fiber bundle 15c adjacent to the glass fiber bundles 15a and 15b is
Since the clamping force between the 0-ra 41 and the 20-ra 42 becomes smaller, the take-up speed becomes slower, and the tension supplied to the beneddler 18 increases compared to the normally fed glass fiber bundle. As a result, the glass fiber bundle 15c is not impregnated with resin during the production of the stampable sheet, which hinders the development of strength and deteriorates the appearance of the molded product.

Therefore, a comb-shaped guide 44 as shown in FIG.
It is provided in front of the 0-ra 41. This guide 44 prevents adjacent glass fiber bundles 15 from becoming twilled.
It is taken up by the feed roller 27.

The glass fiber bundle 15 is transferred from a feed roller 27 to a variable-pitch comb-shaped guide 17 provided at the center of a needler 18.
, and is supplied to the needler 17 with uniform arrangement and tension. Thereby, glass fiber bundle (unidirectional fiber bundle)
15 is laminated and needled on the non-directional fiber layer 13 that is conveyed from the right side to the left side under the feed roller 27 in FIG.

In this way, the roving, cake or yarn is fed directly to the glass fiber mat manufacturing equipment (e.g. its needler) as a unidirectional fiber bundle, thereby eliminating the need for rewinding the roving, cake or yarn onto the warp beam. be. The replacement of rovings, cakes or yarn rolls is also carried out by joining the starting ends of the rovings, cakes or yarns of the new rolls, starting from the end of the glass fibers, and in the case of warp beams. It is very easy as there is no need to adjust the length or tension as in the case of . Furthermore, since this winding is replaced without stopping the glass fiber mat production equipment, the glass fiber mat can be continuously produced.

〔Effect of the invention〕

In the case of the glass fiber mat manufacturing method and apparatus according to the present invention, the unidirectional fiber bundle supply device is placed between the dryer and the needler, so that the arrangement of the unidirectional fiber bundles is prevented from being disturbed by hot air blowing from the dryer. Does not occur.

Furthermore, since the unidirectional fiber bundle is guided through a comb-shaped guide and tension is applied to the unidirectional fiber bundle, the unidirectional fiber bundle is guided and fed parallel to each other at a constant interval, and is not subjected to the vibration of the needler. The fibers are arranged straightly at an angle of 4° on the non-directional fiber layer without meandering.

Therefore, a glass fiber mat with stable performance can be produced by the method and apparatus for producing a glass fiber mat according to the present invention.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an apparatus for producing a glass fiber mat according to an embodiment of the present invention, FIG. 2 is a view showing an example of an apparatus for applying tension to a unidirectional fiber bundle, and FIGS. FIG. 3 is a plan view of a glass fiber mat manufacturing facility equipped with a unidirectional fiber bundle supply device according to this modification, and FIG. 4 is a diagram showing a roving winding of the unidirectional fiber bundle supply device. A perspective view showing the positional relationship between the body, shelf, and hard pipe.
Fig. 5 is a side view of Fig. 4, Fig. 6 is a sectional view showing the inlet portion of the rigid pipe, Figs. 7a, 7b, 7c, and 7.
Figures d and 7e are cross-sectional views showing different examples of flexible pipes, Figure 8 is a cross-sectional view of the entrance guide provided in front of the feed roller, Figure 9 is a plan view of the iron plate and iron pipe of the entrance guide, FIG. 10 is a schematic side view showing the positional relationship between the entrance guide and the feed roller, FIG. 10A is a partially enlarged view of FIG. 1o, FIG. 11 is a perspective view showing the feed roller, and FIG. FIG. 13 is a perspective view showing a conventional glass fiber mat manufacturing apparatus. 10.11...Conveyor belt, 12...Glass long fiber bundle, 13...Nondirectional fiber layer, 14...
・Dryer, 15...unidirectional fiber bundle, 16...
Warp beam, 17...comb-shaped guide, 1st
... Needler-19, ... Glass fiber mat, 2
0...Delivery roller, 21...Spring, 22
... Tension roller 23 ... Roving, cake or yarn roll, 24 ... Shelf, 25 ...
・Straight pipe, 26...Flexible pipe,
27...Feed roller, 28...Guide support, 29...Guide support, 30...
Titanium guide, 31... Cap, 32...
・Titanium guide, 35... Entrance guide, 36...
- Iron pipe, 3.7... Iron plate, 9... Center line of titanium guy, 41° 44... Comb-shaped guy 38 - Do, 42°... Guide presser, 3 40... Entrance guide 43. ··roller,

Claims (7)

[Claims] 1. The glass fiber bundle is shaken off onto a horizontally arranged belt conveyor to form a non-directional fiber layer, and this non-directional fiber layer is dried in a dryer. A unidirectional fiber bundle is supplied onto the non-directional fiber layer to laminate the unidirectional fiber layer, and at this time, the unidirectional fiber bundle is guided in parallel at regular intervals in the width direction, and the laminated one is A method for producing a glass fiber mat, comprising: supplying a directional fiber layer and a non-directional fiber layer to a needler and needling them to form a glass fiber mat; and transporting this glass fiber mat by a delivery roller. . 2. A device that manufactures glass fiber mats by needling laminated unidirectional fiber layers and non-directional fiber layers includes a horizontally arranged belt conveyor and a glass fiber bundle that is shaken off onto the belt conveyor. A non-directional fiber bundle supply device that forms a non-directional fiber layer; a dryer disposed in front of the non-directional fiber bundle supply device; A unidirectional fiber bundle supply device placed in front of the dryer to form a fiber layer, and a unidirectional fiber bundle supplied from the unidirectional fiber bundle supply device are guided in parallel at regular intervals in the width direction. A comb-shaped guide for applying a constant tension to the unidirectional fiber bundle supplied from the unidirectional fiber bundle supply device, and a means for intertwining the laminated unidirectional fiber layer and non-directional fiber layer by needling. The present invention is characterized by comprising a needler disposed in front of the unidirectional fiber bundle supply device for combining the glass fiber mats, and a delivery roller disposed in front of the needler for conveying the glass fiber mat. Glass fiber mat manufacturing equipment. 3. 3. The glass fiber mat manufacturing apparatus according to claim 2, wherein the unidirectional fiber bundle supply device is a warp beam wound with a glass fiber bundle. 4. a pipe and guide through which the unidirectional fiber bundle feeder guides the glass fiber bundle from the roving, yarn, or cake;
3. The glass fiber mat manufacturing apparatus according to claim 2, further comprising a rotationally driven feed roller that feeds the glass fiber bundle onto the non-directional fiber layer. 5. The means for applying a constant tension to the unidirectional fiber bundle is an electromagnetic clutch attached to the warp beam or feed roller. The apparatus for manufacturing a glass fiber mat according to any one of claims 2 to 4, characterized in that tension is applied to the fiber bundle. 6. The means for applying a constant tension to the unidirectional fiber bundle is a rotational drive device for the warp beam or feed roller. The apparatus for manufacturing a glass fiber mat according to any one of claims 2 to 4, characterized in that tension is applied to the directional fiber bundle. 7. According to any one of claims 2 to 4, wherein the means for applying a constant tension to the unidirectional fiber bundle is a tension roller arranged so as to be lightly pressed against the unidirectional fiber bundle. The apparatus for manufacturing the glass fiber mat described above.