JPH0655984B2 - Method and apparatus for continuous production of fiber mat - Google Patents

Description

The present invention relates to a method for continuously producing a fiber mat represented by a glass fiber mat of an FRP product, and an apparatus therefor.
More particularly, the present invention relates to a method and an apparatus for continuously producing a fiber mat by feeding a continuous strand so as to stack and collect cotton while operating a cotton collecting conveyor.

[Conventional technology]

For example, in an FRP product, its mechanical strength and rigidity are greatly influenced by the content and arrangement of the glass fiber mat. As a result, it is important to improve the distribution characteristics such as unit weight distribution and orientation of the glass fiber mat in order to improve the quality of FRP products.

In order to manufacture a fiber mat such as a glass fiber mat, the following means have hitherto been adopted.

That is, a means for operating a conveyor and reciprocating a feeding machine for feeding continuous strands in conjunction with the conveyor in the width direction of the conveyor to stack and collect the strands on the conveyor (for example, JP-A-57-47959). In addition to this, another feeding device is provided on the lower side of the feeding device in the conveyor conveying direction, and the feeding device is reciprocated in the conveyor width direction by interlocking with the feeding device. It is means for feeding another strand between the strands fed on the conveyor to stack and collect the strands on the conveyor (for example, Japanese Patent Laid-Open No. 57-47960).

However, in any case of the above-mentioned conventional means, since the strands are fed while the feeding machine is reciprocatingly moved, the tension of the strands drawn from the strand cake or roving, bushing to the feeding machine is reciprocated by the feeding machine. fluctuate. As a result, in particular, when the conveyer speed of the conveyor and the moving speed of the payout machine are increased to improve productivity, the strand feeding load by the payout machine suddenly changes at both ends of the reciprocating movement path, and the both ends of the reciprocating movement path And the amount of cotton collected on the conveyor changes in the width direction. Moreover, there is a mechanical limit to the moving speed of the unwinding machine, and if the moving speed is too fast, excessive tension may act on the strands, resulting in breakage. Cannot be increased so much that productivity cannot be significantly improved.

Further, as a conventional method of taking a means different from the above-mentioned means for producing a fiber mat, the feeding machine is fixed above the conveyor, and while the strand feeding direction of the feeding machine is reciprocally displaced over the entire width of the conveyor, it is conveyed. A zigzag-shaped strand collecting band made up of spirally overlapping strands is formed on the conveyor moving in the direction, and each zigzag-shaped strand collecting band formed by a plurality of feeding machines shifts in the conveyor conveying direction. There is one (for example, Japanese Utility Model Publication No. 43-234) in which cotton is laminated and collected by setting the timing so as to polymerize in such a state.

However, in this method, even if the feeder is installed at any position on the conveyor, since the feeding direction of the feeder is always displaced, the distance from the feeder to the strand drop portion on the conveyor, and The drop angle will always change, and the change in kinetic energy due to the difference in the length of the unwound strand and the change in the action direction of the kinetic force will always occur, forming a uniform spiral of the strand. Not only is it difficult to achieve this, but as a result, there is a problem that the amount of cotton collected on the conveyor tends to be uneven depending on the location. Furthermore, in order to improve productivity, the conveyor conveyance speed is increased. In this case, there is a risk that the strand collecting cotton bands adjacent to each other in the conveyor conveying direction do not polymerize and the strand non-collecting cotton portion remains on the conveyor.
There is the drawback of being non-uniform.

[Problems to be solved by the invention]

The present invention has been made in consideration of such circumstances, and has a first object in providing a method capable of producing a fiber mat excellent in distribution characteristics with good productivity,
It has a second purpose in providing a device useful in carrying out the method described above.

[Means for solving problems]

The feature of the method for continuously producing a fiber mat according to the present invention, which has been taken to achieve the first object, is that a plurality of feeding machines for drawing and feeding continuous strands are arranged in parallel in the width direction of the cotton collecting conveyor at appropriate intervals. A plurality of feeders are arranged in advance in the conveyor conveying direction, and a large number of these feeders are fixed at different positions in the conveyor width direction, and the strands from each feeder are connected in the conveyor width direction. The strands are wound in a spiral shape having a diameter larger than the feeding distance between them and the center part of the strand spirals fed onto the operating conveyor is extended along the longitudinal direction of the conveyor to stack and collect the strands on the conveyor. Where it is.

Further, the characteristic configuration of the fiber mat manufacturing apparatus according to the present invention, which has been taken to achieve the second object, is that a plurality of feeding machines for pulling out and feeding the strands are juxtaposed at appropriate intervals in the conveyor width direction, The plurality of feeders by the feeders are arranged in parallel in the conveyor transport direction, and the positions of the plurality of feeders in the conveyor transport direction are different from each other, and are adjacent to each other in the conveyor transport direction. The feeding interval between them is set to be smaller than the spiral diameter of the spiral strands fed from the feeding machine onto the conveyor.

[Action]

According to the continuous manufacturing direction of the fiber mat according to the present invention, a plurality of feeders in which a plurality of feeders are juxtaposed in the conveyor width direction at appropriate intervals are arranged in advance in the conveyor transport direction.
Each of these many feeding machines is fixed at different positions in the conveyor width direction, and the strands from each feeding machine are wound in a spiral shape having a diameter larger than the feeding interval between the consecutively arranged conveyor width directions, Moreover, since the center part locus of the strand spiral supplied to the operating conveyor is fed along the longitudinal direction of the conveyor to stack and collect the strands on the conveyor, it is fed from each feeding machine in each feeding machine row. Strands can be paid out on the conveyor with an appropriate distance secured between strands, strands can be prevented from being entangled with each other, and stable strand laminated cotton collection is possible. Also, even if the feeding speed of the strands is increased, it is possible to smoothly carry out the layered cotton collection of the strands in a stable state. It is possible to improve the capital of productivity. Further, since it becomes possible to always keep the distance between each of the feeding machines and the conveyor constant, it is possible to reduce the kinetic energy of the fed strands and the variation in the action direction thereof, and to repeat the strands under the same conditions. By taking out, it is possible to stack the regular spirals of the strands on the conveyor, and further, it is possible to reliably polymerize the spirals of the adjacent strands in the conveyor width direction. It is possible to make uniform the cotton collection distribution of the strands, and to form a uniform fiber mat. That is, it becomes possible to achieve both uniformity and productivity of the quality of the fiber mat.

Further, according to the fiber mat manufacturing apparatus of the present invention, while sufficiently securing the overlapping margin of the spiral strands adjacent to each other in the conveyor width direction, avoiding mutual interference between the respective feeders, each feeder A sufficient installation space in the width direction of the conveyor can be secured, and the above-described continuous method for producing a fiber mat of the present invention can be carried out more efficiently.

〔The invention's effect〕

Therefore, according to the continuous method for producing a fiber mat and the apparatus thereof of the present invention, the stacking allowance of the adjacent spiral strands in the conveyor width direction is sufficiently taken, and the laminated cotton collection of the strand is surely performed, and the amount of the strand, the density, A fiber mat having excellent distribution characteristics such as orientation can be manufactured with high productivity.

Furthermore, each feeder is installed in a space-friendly way,
It has become possible to provide a continuous fiber mat manufacturing apparatus having excellent maintainability for each feeding machine.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

(1) is a net conveyor for cotton collection that operates at a constant speed,
(2) and (2 ') are a first feeding device and a second feeding device for feeding the glass strands (S) on the conveyor (1) so as to stack and collect them, and (3) is for the conveyor (1). ) Is a needler that nails the collected cotton strands (GS) into a non-woven glass fiber mat (FM), and (4) is a non-woven glass fiber mat (F).
It is a winding shaft for winding M).

The first feeding device (2) is a plurality of strand cakes (SC).
A plurality of glass strands (S) are drawn out from the reel and drawn out in a spiral shape on the conveyor (1) (the drawing shows nine).
It is equipped with a feeding machine (5). The feeding machine (5) is arranged in the conveyor width direction with an interval () smaller than the diameter (D) of the spiral glass strand (S), and adjacent ones in the conveyor width direction are displaced in the conveyor conveyance direction. It is arranged in a state. Specifically, on the conveyor (1) is the conveyor (1)
Three frames (6) traversing the conveyor are juxtaposed at appropriate intervals in the conveyor conveying direction, and the first, fourth, and seventh feeding machines (5) counted from one end side in the conveyor width direction are the first In the frame (6) of the second row, the second, fifth and eighth feeders (5) are in the second frame (6) of the third, sixth and ninth feeders (5) are in the third row. Mounted on each frame (6). The interval () between the advancing machines (5) adjacent to each other in the conveyor width direction is 1/2 to 2/3 or less of the diameter (D) of the spiral glass strand.

The second feeding device (2 ') is arranged on the lower side of the first feeding device (2), and a plurality of feeding devices (5') similar to the above are provided in the first feeding device (2 '). ) And is attached to the frame (6 ′).

Note that (7) is a guide for focusing the glass strands (S) from each strand cake (SC).

Next, the driving method will be described.

(A) Usually, the glass strands (S) are delivered from each of the delivery devices (5) of the first delivery device (2) and collected on the net conveyor (1).

(B) Strand (S) winding around the feeding machine (5) and strands
When the feeding function of one or a plurality of feeding devices (5) of the first feeding device (2) is impaired due to disconnection of (S), that is, in the case of failure, the failure feeding device (5) Instead, the strand (S) is delivered from the delivery device (5 ') in the second delivery device (2') corresponding to the fault delivery device (5) to compensate the delivery of the strand (S). The operation start timing of the compensation feeding device (5 ′) in the second feeding device (2 ′) is determined by the failure feeding device (5).
At the end of the strand (S) drawn from the
It is the timing to connect the starting ends of the strands (S) fed from (5 ′).

(C) When the failed feeding device (5) of the first feeding device (2) is restored, the restored feeding device (5) is restarted, and the feeding strand (5) from the restarting feeding device (5) The starting end of (S) is the second feeding device.
When the compensating feeding device (5 ') of (2') is moved to the feeding position, the operation of the compensating feeding device (5 ') is stopped.

(D) One or a plurality of feeding devices in the first feeding device (2)
The second feeder operated in place of the fault feeder (5) before the fault feeder (5) fails and the fault feeder (5) is restored.
If the compensating feeder (5 ') in (2') fails, the entire manufacturing equipment is immediately stopped and the fault feeder (5), (5 ')
After the restoration, the operation is continued from the state just before the stop.

The unit weight distribution in the width direction of the glass fiber mat (FM) manufactured by the manufacturing apparatus configured as described above was almost constant as shown in FIG. Incidentally, the unit weight distribution of the glass fiber mat (FM ') produced by the conventional device for feeding and collecting the strands while moving the feeding machine in the width direction of the conveyor is as shown by the dotted line in FIG. It was lighter on the left and right ends. In addition, the measurement of the unit weight distribution is
Cut off the left and right ears of the mat (FM), divide it into two parts on the left and right, and collect samples of width × height 300 mm × 500 mm from the left and right ends and the center of each divided mat. It was done by weighing.

In the above embodiment, the second feeding device (2 ')
Although the same number of feeders (5 ') as the feeders (5) of the first feeder (2) are provided in the same arrangement, the present invention provides a second feeder.
The number of feeding machines (5 ') provided in (2') is the same as that of the first feeding apparatus (2).
The number of feeding devices (5) in
The feeding device (5 ′) of (2 ′) is replaced with the feeding device (5) of the first feeding device (2).
When the feeding device (5) of the first feeding device (2) fails, the second feeding device is configured to be movable to a position corresponding to
The feeding device (2 ') (2') may be moved to a position corresponding to the fault feeding device (5) and operated at the timing as described above.

[Brief description of drawings]

The drawings show an embodiment of the method for continuously producing a fiber mat and the apparatus therefor according to the present invention. Fig. 1 is a schematic perspective view, and Figs. 2 and 3 are plan views and longitudinal front views showing a state of collecting cotton on a conveyor. FIG. 4 is a graph showing the unit weight distribution of the fiber mat. (1) …… Conveyor for collecting cotton, (S) …… Strand, (5) ……
Feeder.

Claims (6)

[Claims] 1. A fiber mat (FM) is continuously produced by operating a cotton-collecting conveyor (1) and feeding out continuous strands (S) so as to stack and collect cotton on the conveyor (1). A method of feeding a strand (S) and feeding it out by a conveyor (5)
(1) A plurality of feeders arranged side by side at appropriate intervals in the width direction are arranged in advance in the conveyor conveyance direction, and a large number of these feeders (5) are fixed at different positions in the conveyor width direction. Incidentally, the strand (S) from each feeding machine (5) is formed in a spiral shape having a diameter (D) larger than the feeding interval () between consecutively arranged ones in the conveyor width direction, and the conveyor (1) The center of the spiral of the strands supplied above is fed along the conveyor longitudinal direction, and the conveyor (1)
A continuous method for producing a fiber mat in which strands (S) are laminated and collected on top. 2. The continuous method for producing a fiber mat according to claim 1, wherein the interval () between the feeding machines (5) is 1/2 to 2/3 or less of the strand spiral diameter (D). 3. The continuous method for producing a fiber mat according to claim 1 or 2, wherein the strand (S) is a glass strand. 4. A fiber mat (FM) is continuously produced by operating a cotton-collecting conveyor (1) so that continuous strands (S) are stacked and collected on the conveyor (1). The device is a conveyor that pulls out the strand (S) and feeds it (5).
(1) A plurality of feeders arranged in parallel in the width direction at appropriate intervals, and a plurality of feeders by the plurality of feeders (5) are arranged in the conveyor transport direction, and the plurality of feeders in the conveyor transport direction are viewed. (5) The feeders (5), which are arranged at different positions and which are adjacent to each other when viewed in the conveyor transport direction, are fed from the feeder (5) onto the conveyor (1). A continuous fiber mat manufacturing apparatus in which the diameter is set smaller than the spiral diameter (D) of the spiral strand (S). 5. The continuous fiber mat manufacturing apparatus according to claim 4, wherein the interval () between the payout devices (5) is 1/2 to 2/3 or less of the strand spiral diameter (D). 6. The continuous fiber mat manufacturing apparatus according to claim 4 or 5, wherein the strands (S) are glass strands.