JPS585771B2 - 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)
The resin-impregnated glass fiber sheet material 2 used as a molding raw material in this method is
It is produced continuously by being sandwiched in a sandwich style between two sheets of separating film 1, 1, then wound up into a roll and stored, and immediately before press forming, it is cut into an appropriate size, and both sides are The separating films 1, 1 are peeled off and supplied 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 cutter roll 4 and the rubber roll 5, and the separate film 1 (the upper surface of which has already been coated with an impregnating resin liquid) is transported on a conveyor belt 6. ) to form a glass fiber mat, 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 view of the above points, the present invention provides a resin-impregnated fiber sheet material made of short fibers arranged in a two-dimensional array vertically and horizontally and in a three-dimensional array vertically, horizontally, and vertically, instead of the conventional resin-impregnated fiber sheet material made of short fibers arranged in one dimension. It is an object of the present invention to provide a method for manufacturing an impregnated fiber sheet material, and the first aspect of the present invention is to provide a method for producing an impregnated fiber sheet material, and the first aspect of the present invention is to provide a method for producing an impregnated fiber sheet material. , short fibers oriented approximately perpendicular to the direction of travel of the separate film are dropped onto one separate film, and short fibers oriented approximately parallel to the direction of travel of the separate film are dropped onto the other separate film. The method is characterized in that when the two deposited layers are brought close to each other, the surfaces of the two deposited layers are adhered to each other and are pulled vertically downward.

A second aspect of the present invention is that, of both separate films whose surfaces are coated with an impregnating resin liquid while moving in a direction approaching each other at a predetermined speed, there is a surface on one of the separate films that is approximately perpendicular to the direction of movement of the separate film. Short fibers oriented in one direction are dropped onto another separate film, and short fibers oriented in a direction substantially parallel to the direction in which the separate film travels are dropped and deposited on the other separate film, and after both of the above separate films approach each other, they are dropped vertically. The method is characterized in that a short fiber having a length shorter than any of the short fibers described above is dropped from above the position where the short fiber is placed, and is made to intersect perpendicularly to each of the above-mentioned short fibers.

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

An example of the first invention of the present invention is as shown in FIG.
Separate films a and 1b travel on a conveyor belt (the conveyor belt is omitted in FIGS. 3 and 5) that travel at a predetermined speed in a direction approaching each other.

An impregnating resin liquid is applied to the upper surfaces of the separate films 1a and 1b.

4a is a cutter roll installed above the separate film 1a, and a rubber roll 5a is installed adjacent to this cutter roll 4a, and the cutter roll 4a and the rubber roll 5a form a pair to form a cutting machine. .

3a is a long fiber such as a glass roving, which is passed between a cutter roll 4a and a rubber roll 5a and cut into short fibers 3'a.

A direction regulating plate 7a parallel to the axis of the cutter roll 4a is installed below the cutter roll 4a.

This direction regulating plate 7a is caused to reciprocate (arrow a) in a direction perpendicular to the advancing direction (arrow C) of the separate film 1a by an appropriate drive device (not shown), and the short fibers falling onto it 3'a is inclined so that it can easily slide down.

Therefore, the short fibers 3'a cut by the cutter roll 4a
When it falls, most of it hits the direction regulating plate 7a, and due to the reciprocating action of the direction regulating plate 7a, the direction is regulated in a direction perpendicular to the direction of movement (arrow C) of the separate film 1a, and the part is placed on the separate film 1a. It falls and accumulates.

4b is a cutter roll installed above the separate film 1b, a rubber roll 5b is installed adjacent to the cutter roll 4b, and the cutter roll 4b and rubber roll 5b form a pair to form a cutting machine.

3b is a long fiber such as glass roving, which is passed between a cutter roll 4b and a rubber roll 5b and cut into short fibers 3'b.

A separate film 1b is placed below the cutter roll 4b.
reciprocating motion (arrow b) in a direction parallel to the direction of movement (arrow d) of
) is provided with a direction regulating plate 1b.

Therefore, the short fibers 3'b cut by the cutter roll 4b
When falling, most of the film hits the direction regulating plate 7b, and the direction of the separate film 1 is regulated in a direction substantially parallel to the direction of movement (arrow d) of the separate film 1b.
b falls and accumulates on top.

In addition, the direction regulating plate mentioned above? By using corrugated plates for a and 7b as shown in the figure, the direction regulation of the short glass fibers 3'a and 3'b can be made more effective.

Therefore, when the deposited layer 30a formed on the separate film 1a and the deposited layer 30b formed on the separate film 1b come close to each other, as shown in FIG. When the deposited layers 30a and 30b are adhered and pulled vertically downward, both deposited layers 30a and 30b are laminated, and short fibers 3'a and 3'b arranged in two dimensions in the vertical and horizontal directions are formed as shown in FIG. A two-dimensional array of resin-impregnated fiber sheet material for molding is produced, which is sandwiched from both sides by separate films 1a and 1b in a sandwich-like manner.

In the present invention, an appropriate amount of the impregnating resin liquid may be dropped from above a position where both the deposited layers 30a and 30b are close to each other (indicated by the symbol A in the figure).

In addition, in the figure, in order to clearly show the directions of the short fibers 3'a and 3'b, the thicknesses of the deposited layers 30a and 30b are shown much thicker than they actually are.

Next, an example of the second aspect of the present invention will be explained with reference to FIGS. 5 and 6.

While FIG. 3 is a perspective view, FIG. 5 is a side view.
All of the b1 direction regulating plates 7a, 7b, etc. have the same mechanism and arrangement as explained in FIG. 3.

Therefore, the explanation of these will be omitted.

In FIG. 5, 4c indicates separate films 1a and 1.
b is a cutter roll installed above a portion adjacent to each other, and a rubber roll 5c is installed adjacent to this cutter roll 4c, and the cutter roll 4c and rubber roll 5c form a pair to form a cutting machine. .

3c is a long fiber such as a glass roving, which is passed between a cutter roll 4/c and a rubber roll 5c and cut into short fibers 3'C.

A direction regulating plate 7c that reciprocates in the same direction (arrow b) as the direction regulating plate 7b is installed below the cutter roll 4c.

This direction regulating plate IC has a very gentle slope that is almost horizontal.

Therefore, the short fibers 3'c cut by the cutter roll 4c
When falling, it hits the direction regulating plate 7c, and due to the reciprocating action of the direction regulating plate 7c, the direction is regulated in a direction substantially parallel to the traveling direction of the separate films 1a and 1b, and the deposited layers 30a and 30b are brought close to each other. Then, as shown in the figure, it falls in a substantially horizontal state from above a position A where both surfaces contact each other and fall vertically.

Note that this short fiber 3'c is cut much shorter than the short fibers 3'a and 3'b, and its length is the same as that of the short fiber 3'c.
Thickness of deposited layer 30a of 'a and deposition of short fibers 3'b-30
Since the length is approximately equal to the total thickness of the separated films 1a and 1b, at the position A where the deposited layers 30a and 30b vertically descend, the short fibers 3 It penetrates into the deposited layers 30a and 30b perpendicularly to 'a and 3'b, respectively.

Thus, short fibers 3'a, 3'b as shown in FIG.
, 3'c are arranged in a three-dimensional manner so that a fiber sheet is formed.

Note that, if necessary, the impregnating resin liquid may be poured at position A where the deposited layers 30a and 30b are vertically descending close to each other.

Separate films 1a and 1b are coated with an impregnating resin liquid in advance, as explained in the example of the first invention.

The present invention is as described above, and by press-molding a two-dimensional or three-dimensional array of resin-impregnated fiber sheet material obtained by the method of the present invention, a one-dimensional array of resin-impregnated fiber sheet material obtained by a conventional method is used. It is possible to produce a molded product that is significantly superior in strength to a molded product that is press-molded from a fiber sheet material.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a resin-impregnated glass fiber sheet material, FIG. 2 is a perspective view for explaining the conventional manufacturing method of the above sheet material, and FIGS. A perspective view and a side view for explaining the manufacturing methods according to the first invention and the second invention, and FIG. 4 and FIG. FIG. Ia, 1b are separate films, 3 a-, 3b
, 3c are long fibers such as glass roving, 3'a, 3'
b, 3'c are glass fibers, 4a, 4b, 4c are cutter rolls, 5a, 5b, 5c are rubber rolls, 7a, 7
b, 7c are direction regulating plates, 30a and 30b are short fibers 3
'a and 3/b deposited layers, A is deposited layers 30a and 30
b and vertically descending in close proximity to each other.

Claims (1)

[Scope of Claims] 1. Separate films whose surfaces are coated with an impregnating resin liquid as they move toward each other at a predetermined speed,
Short fibers oriented approximately perpendicular to the direction of separation film travel are dropped onto one separate film, and short fibers oriented approximately parallel to the direction of travel of the separate film are deposited onto the other separate film. A method for manufacturing a resin-impregnated fiber sheet material for molding, characterized in that when both the deposited layers are brought close to each other, the surfaces of the deposited layers are adhered to each other and are pulled vertically downward. 2. Both separate films are coated with an impregnating resin liquid on their surfaces as they move toward each other at a predetermined speed.
Short fibers oriented approximately perpendicular to the direction of separation film travel are dropped onto one separate film, and short fibers oriented approximately parallel to the direction of travel of the separate film are deposited onto the other separate film. and dropping short fibers having a length shorter than any of the above-mentioned short fibers from above the position where the above-mentioned separate films fall vertically after coming close to each other, and making the short fibers fall perpendicularly to each of the above-mentioned short fibers. A method for manufacturing a resin-impregnated fiber sheet material for molding.