JPS585770B2 - Seikei Yoji Yushigan Shinsen Ishi Tozai No Seizou Hohou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a resin-impregnated fiber sheet material used as a molding raw material when press-molding a fiber-reinforced plastic, such as FRP (glass fiber-reinforced plastic) molded product.

One of the FRP molding methods is to impregnate glass fiber with unsaturated polyester resin or epoxy resin containing a curing agent, internal mold release agent, filler, coloring agent, etc. for non-stick, easy-to-handle molding. SMC method of press molding using sheet material (sheet molding compound method, shest molding compound method)
There is.

The resin-impregnated glass fiber sheet material 2 used as a molding raw material in this method is continuously produced by being sandwiched between two separating films 1, 1 in a sandwich manner, as shown in Fig. 1. Then, it is wound up into a roll and stored, and immediately before press molding, it is cut into an appropriate size, the separating films 1, 1 on both sides are peeled off, and then fed to a press molding machine.

Conventionally, the resin-impregnated glass fiber sheet material described above is
As shown in the figure, glass fiber e.g. glass roving 3
is cut into short fibers 3' of a predetermined length through the gap between the Katsutani roll 4 and the rubber roll 5, and the separate film 1 travels on the conveyor belt 6 (the upper surface of which has already been coated with an impregnating resin liquid). A glass fiber mat is formed by dropping the glass fibers onto the glass fibers, and the mat is impregnated with an impregnating resin solution such as an unsaturated polyester resin or an epoxy resin by an appropriate method such as coating or spraying.

Resin-impregnated glass fiber sheet 2 manufactured by such conventional method
Most of the short glass fibers 3' constituting it are the second
As shown in the figure, they are arranged parallel to the traveling direction of the separate film 1.

Therefore, the strength of a product molded using this as a molding raw material is strong in the direction in which the short glass fibers 3' are arranged, but weak in the direction perpendicular to the direction in which they are arranged.

In order to eliminate the drawbacks of the resin-impregnated fiber sheet material for molding manufactured by the above-mentioned conventional method, the present invention has developed a resin-impregnated fiber sheet material (
1st invention) and a resin-impregnated fiber sheet material (1st invention) consisting of large and small short fibers arranged in three dimensions (vertical, horizontal, and vertical) and ultrashort fibers that are much shorter than the large and small short fibers. 2
The first aspect of the present invention is to cut long fibers into large and small short fibers with different lengths using a cutting machine, and then blow air to cut the long fibers into large and small short fibers.
The small short fibers are sorted by weight, and the directions of the large short fibers and small short fibers are alternated by applying them to an inclined plate that reciprocates in directions with a 90° phase difference, which is installed at the position where the large short fibers and small short fibers fall. After regulating the direction perpendicular to the cutting machine, it is dropped and deposited on a separate film coated with an impregnating resin liquid on the surface of the cutting machine as it moves at a predetermined speed below the cutting machine, and the resulting two-dimensional vertical and horizontal The method is characterized in that an impregnating resin liquid is impregnated from the upper surface of a fiber sheet made of arranged large and small short fibers, and a separate film is laminated thereon.

The second aspect of the present invention is to cut long fibers into large and small short fibers of different lengths and ultrashort fibers with a length much shorter than these large and small short fibers using a cutting machine, and then blow Then, the large and small short fibers and ultra-short fibers are sorted by weight, and the large and small short fibers are applied to an inclined plate installed at each falling position and reciprocating in directions 90° out of phase with each other. After regulating the directions of the large and small short fibers to be perpendicular to each other, they are allowed to fall and accumulate on a separate film whose surface is coated with an impregnating resin liquid as it advances at a predetermined speed below the cutting machine. In addition, the above-mentioned ultra-short fibers are inserted perpendicularly to the separate film surface, and the above-mentioned separate film ? An impregnating resin solution is impregnated from the upper surface of the thus obtained fiber sheet consisting of three-dimensionally arranged large and small short fibers and ultrashort fibers, and a separate film is laminated thereon. It is characterized by this.

Hereinafter, the present invention will be explained in more detail based on the drawings.

As shown in FIGS. 3 and 4, an example of the first aspect of the present invention is to cut long fibers 3, such as glass roving, into large and small pieces of different lengths using a cutting machine consisting of a cutter roll 4 and a rubber roll 5. Cut into short fibers 33,3.

The cutting blade of the cutter roll 4 of this cutting machine is shown in a perspective view in FIG. 3 and a side view in FIG. 4 (however, only the belt conveyor 6 and the separate film 1 are shown in a perspective view).
As shown, they are provided with different gaps.

Therefore, the portions B of the cutting blades provided at small intervals cut into small short fibers 3, and the portions C of the cutting blades provided at large intervals cut into large short fibers 33.

The method of cutting into large and small short fibers 33, 3 is as follows:
This can also be achieved by a 1*rotation method in which a cutter roll 4 provided with cutting blades at equal intervals is rotated quickly or slowly.

To the large and small short fibers 33, 3 cut as above,
By applying wind using an air blower (not shown) as shown by arrow a in FIGS. 3 and 4, the small short fibers 3 are made smaller than the large short fibers 33. Since the weight is smaller, the short and short fibers 3 fall further away than the short and large fibers 33.

73 and 72 are inclined plates installed in front of the cutting machines 4 and 5, and the inclined plate 73 is installed closer to the cutting machines 4 and 5 than the inclined plate 7, and the inclined plate 73 is a separate plate. The inclined plate 7 moves back and forth (arrow b) in a direction perpendicular to the traveling direction (arrow d) of the film 1, and the inclined plate 7
° It reciprocates (arrow c) in a direction in which the phase is different, that is, in a direction parallel to the separate film advancing direction (arrow d).

Therefore, the soybean fibers 33 fall onto the inclined plate 73, and the separate film advances due to the reciprocating action of the inclined plate 73 as shown by the arrow C. On the other hand, the small short fibers 3 jump over the inclined plate T3 and fall onto the inclined plate 72, and are separated into separate films by the reciprocating action of the inclined plate 7 as shown by the arrow C. These large and small short fibers 3 are regulated in a direction almost parallel to the traveling direction (arrow d)
3 and 32 are regulations respectively? The film is deposited on the separate film 1 in the direction shown in FIG.

Therefore, on the separate film 1, there is a fiber sheet stacked layer consisting of large and short fibers 33 and small short fibers 3 that are substantially perpendicular to each other, that is, in a two-dimensional arrangement, as shown on the right side of FIGS. 3 and 4. It is formed.

After the resin solution for impregnation is impregnated into this fiber sheet deposited layer, the separate film 1 is laminated thereon, whereby the resin-impregnated fibers for molding are easily sandwiched between the upper and lower surfaces of the separate films 1, 1 in a sandwich style. A sheet material is manufactured.

In addition, when the inclined plates 72 and 73 are made into corrugated plates as shown in the figure, the direction of the short fibers 3 and 33 is determined. is even more effective.

Next, an example of the second invention will be explained.

In the present invention, the long fibers 3, for example glass roving, are cut by a cutting machine consisting of a cutter roll 4 and a rubber roll 5. Cut into ultrashort fibers 3 of short length.

The cutting blade of the cutter roll 4 of this cutting machine is shown in a perspective view in FIG. 5 and a side view in FIG. 6 (however, only the belt conveyor 6 and separate film 1 are shown in a perspective view).
As shown in the figure, they are provided at different intervals.

Therefore, in the part A of the cutting blade provided at the smallest interval, the ultrashort fibers 3 are cut into medium ? The portions B of the cutting blades provided at intervals cut into small short fibers 32, and the portions C of the cutting blades provided at large intervals cut into large short fibers 33.

In addition, these large and small short fibers 33, 3 and ultra short fibers 31
As shown in FIG. 7, the cutting method can also be achieved by a variable speed rotation method in which a cutter roll 4 provided with cutting blades at equal intervals is rotated quickly or slowly.

The large and small staple fibers 33, 32 and the ultra-short fibers 31 cut as described above are heated with a blower (not shown).
As shown by the arrow a in FIGS. 7 to 7, when the ultrashort fibers 3 and the large and small short fibers 33 and 3 have different weights, ? Quantity sorted ultra short fiber 3
falls furthest away, and the small short fibers 3 fall further away than the large short fibers 33.

73 and 72 are the cutting machines 4 and 5 as in the case of the first invention.
Is the inclined plate installed in front of the inclined plate 73 installed closer to the cutting machines 4 and 5 than the inclined plate 72? In addition, the inclined plate 73 moves back and forth (arrow b) L in a direction perpendicular to the advancing direction (arrow d) of the separate film 1, and the inclined plate 7 moves in a direction 90° out of phase with the inclined plate 73, i.e. It is reciprocating (arrow c) in a direction parallel to the direction in which the separate film travels (arrow d).

Therefore, the large and short fibers 33 fall onto the inclined plate 73, and are regulated in a direction approximately perpendicular to the separate film traveling direction (arrow d) by the reciprocating action of the inclined plate 73 as shown by the arrow b. jumps over the inclined plate 73 and falls onto the inclined plate T, and by the reciprocating action of the inclined plate 7 as shown by the arrow C, it is regulated in a direction almost parallel to the direction of advance of the separate film (arrow?), and then these large, Short staple fiber 33
and 3 fall onto the separate film 1 in regulated directions and are deposited thereon.

On the other hand, the ultrashort fibers 3 jump over the inclined plates 73 and 72 and fall onto the separate film 1 without hitting the inclined plates 73 and 72;
This ultrashort fiber 3 is cut into a length much shorter than 2, and the surface of the separate film 1 is coated with an impregnating resin liquid.

The thick part of the resin is deposited vertically on the separate film 1 while being immersed in the resin liquid.

Therefore, on the separate film 1? As shown in FIG. 8, a three-dimensional array of fiber sheet piles is formed, consisting of large and small short fibers 33, 3 that are orthogonal to each other in the vertical and horizontal directions, and ultra-short fibers 31 that are orthogonal to each of these fibers. Ru.

After this fiber sheet pile layer is impregnated with the impregnating resin liquid in the same manner as in the case of the first invention, the separate film 1 is laminated thereon, so that the upper and lower surfaces can be easily sandwiched between the separate films 1, 1 in a sandwich style. A resin-impregnated fiber sheet material for molding with a three-dimensional array is produced.

In addition, in the second invention, an example was explained in which the ultrashort fibers 3 are dropped as they are without hitting the inclined plate, but the ultrashort fibers 31
Of course, it is also possible to collect the materials on a suitable inclined plate, regulate the direction of most of the materials so that they can easily fall vertically onto the separate film 1, and then allow the materials to fall and accumulate on the separate film 1. .

The molded product obtained by press molding using the two-dimensional or three-dimensional array sheet material manufactured in this way is better than the molded product obtained by press molding using the conventional one-dimensional array sheet material. , which is far superior in strength.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a resin-impregnated fiber sheet material for molding, FIG. 2 is a perspective view for explaining the conventional manufacturing method of the above sheet material, and FIGS. 3 and 4 are views of the present invention of the above sheet material. FIG. 3 is a perspective view of an example of the manufacturing method according to the first invention, and FIG. 4 is a side view thereof (however, only the separate film 1 and the conveyor belt 6 are shown in a perspective view). 5 and 6 are the second embodiment of the present invention.
This is a diagram for explaining the method of the invention, and FIG. 5 is a diagram for explaining the method of the invention.
FIG. 6 is a side view of the example (however, only the separate film 1 and the conveyor belt 6 are shown in the perspective view). FIG. 7 is a side view illustrating another example of the method of the second invention. FIG. 8 is a partially enlarged model diagram of a three-dimensional array of glass fiber sheets obtained by the method of the second invention. 1 is a separate film, 2 is a resin-impregnated glass fiber sheet, 3 is a long fiber (glass roving), 31, 3, 33
are ultrashort fibers, small short fibers, and large short fibers, respectively. 4 is a cutter roll, 5 is a rubber roll, 6 is a conveyor belt, and 72 and 73 are inclined plates.

Claims (1)

[Claims] 1. The long fibers are cut into large and small short fibers of different lengths using a cutting machine, and then the large and small short fibers are sorted by weight by blowing air, and the large and small short fibers are separated by weight. The directions of the large and small short fibers are regulated to be orthogonal to each other by applying them to an inclined plate that reciprocates in directions with a 90° phase difference, which is installed at each falling position. A fiber sheet consisting of large and small short fibers arranged in two dimensions vertically and horizontally is obtained by falling and depositing on a separate film whose surface is coated with an impregnating resin liquid while moving downward at a predetermined speed. A method for manufacturing a resin-impregnated fiber sheet material for molding, characterized by impregnating the upper surface with an impregnating resin liquid and laminating a separate film thereon. 2. The long fibers are cut by a cutting machine into large and small short fibers of different lengths, as well as ultrashort fibers that are much shorter than these large and small short fibers, and then air is blown to cut the large, small and short fibers. By sorting the fibers and ultra-short fibers by weight and applying these large and small short fibers to an inclined plate installed at each falling position and reciprocating in directions with a 90° phase difference, large and small short fibers are separated. The directions of are set perpendicular to each other. After controlling the fibers, they are allowed to fall and deposit on a separate film whose surface is coated with an impregnating resin liquid as it moves under the cutting machine at a predetermined speed. In this state, the fiber sheet is deposited on the above-mentioned separate film, and an impregnating resin liquid is impregnated from the upper surface of the thus obtained fiber sheet consisting of three-dimensionally arranged large and small short fibers and superfibers, and then A method for producing a resin-impregnated fiber sheet material for molding, characterized by laminating separate films.