JPH07144358A - Corrugation molding apparatus - Google Patents

Abstract

PURPOSE:To provide a corrugation molding apparatus successively and continuously molding a corrugated panel from a prepreg sheet to obtain the same in an extremely short time, excellent from the aspect of molding cost and easily enabling a honeycomb core manufacturing process line as a whole because the corrugated panel is successively and continuously molded. CONSTITUTION:A corrugation molding apparatus 6 is used in a process producing a honeycomb core made of plastic or fiber reinforced plastic. A pair of upper and lower corrugating belts 9 having corrugated unevennesses formed thereto pararelly and continuously, formed into an endless state and holding a prepreg sheet 1 to send the same, sprockets 10 respectively arranged left and left to be rotated to allow the upper and lower corrugating belts to run and induction heating devices 11 holding the prepreg sheet 1 between the sprokets 10 to send the same and provided so as to be adjacent to the outsides of the upper and lower corrugating belts 9 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugating machine. That is, the present invention relates to a corrugating apparatus, which is used in a manufacturing process of a honeycomb core made of plastic or fiber reinforced plastic.

[0002]

2. Description of the Related Art FIG. 3 is a front explanatory view of a manufacturing process of a honeycomb core of this type of conventional example. (1) is a prepreg sheet, and (2) is a prepreg sheet between racks of a corrugating apparatus. Fig. 3 (3) shows the formed corrugated sheet, and Fig. 4 (4) shows the step of stacking and adhering the corrugated sheets. As shown in the same figure, in the manufacturing process of this kind of honeycomb core, first, the prepreg sheet 1 of plastic or fiber reinforced plastic shown in FIG.
As shown in FIG. 3 (2), the corrugated molding device 2 is passed between the racks 3 and heated and pressed to form the corrugated plate 4 shown in FIG. 3 (3). Was there. Then, the corrugated plate 4 formed in this way is cooled and the adhesive 5 is applied.
After coating, as shown in FIG. 3 (4), the honeycomb core made of plastic or fiber-reinforced plastic was manufactured by stacking and then adhering by heating and pressing.

As a corrugating apparatus 2 for corrugated sheet 4 used in the manufacturing process of such a honeycomb core made of plastic or fiber reinforced plastic, a rack using a pair of racks 3 as shown in the drawing In addition to a two-dimensional press molding method such as a method using 3 and gears, a method using a pair of gears, an autoclave molding method for three-dimensionally molding in a high-pressure pot was also adopted. The prepreg sheet 1 was required to be heated at a high temperature when the corrugated sheet 4 was bent by the corrugating apparatus 2 as described above.

[0004]

By the way, the following problems have been pointed out in such a conventional example. First
In each of the above-described conventional corrugating apparatus 2 of this type, the corrugated sheet 4 is formed by bending the prepreg sheets 1 one by one. In this way, after the formation of the corrugated sheet 4 for one prepreg sheet 1 is completed, the corrugated sheet 4 is formed for the next one prepreg sheet 1, so that the forming process is individually divided. However, it takes a very long time to form the corrugated sheet 4, and a problem has been pointed out in terms of the forming cost. Secondly, similarly, in the corrugating apparatus 2 of this type of conventional example, the corrugated sheet 4 is formed by bending the prepreg sheets 1 one by one, and continuous forming is not performed. Therefore, it has been pointed out that it is difficult to make a line. That is, in the molding apparatus 2 of this type of conventional example, the corrugated plate 4 cannot be continuously molded, which makes it difficult to form a line and automate the entire manufacturing process of the honeycomb core.

In view of such circumstances, the present invention has been made to solve the problems of the above-mentioned conventional example, and combines a pair of upper and lower corrugated belts that are driven by a sprocket and a heating device. The first object is to propose a corrugating apparatus that can form a corrugated sheet in a short time, and secondly can be easily lined.

[0006]

The technical means of the present invention for achieving this object are as follows. That is, this corrugating apparatus is used in the manufacturing process of a honeycomb core made of plastic or fiber reinforced plastic, which is a planar aggregate of hollow columnar cells. Then, a corrugated belt that forms a pair of upper and lower sides, linear corrugated irregularities are formed in parallel and continuously, and forms an endless band shape, and sandwiches and sends a prepreg sheet of plastic or fiber reinforced plastic between each other, Between the sprockets, which are respectively arranged on the left and right sides to rotate the upper and lower corrugated belts, and between the left and right sprockets, the prepreg sheets are sandwiched and provided, respectively, outside the upper and lower corrugated belts. And a heating device. Then, while being heated by the heating device, the prepreg sheet is formed into a corrugated plate in which corrugated irregularities are continuously bent by the upper and lower corrugated belts.

[0007]

Since the present invention comprises such means, it operates as follows. With this corrugating machine, plastic and fiber reinforced plastic prepreg sheets are
While being driven by a sprocket and being sandwiched between corrugated belts and being fed, it is heated by a heating device, and is bent to form a corrugated sheet. Then, the corrugated sheets are bonded by cooling, cutting, application of an adhesive, stacking, and heating and pressing, whereby a honeycomb core made of plastic or fiber reinforced plastic is manufactured. Now, according to this corrugating apparatus, firstly, the corrugated sheet is formed from the prepreg sheet successively and in a short time as described above. Secondly, since the corrugated sheets are sequentially and continuously formed in this manner, it is easy to form a line.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 is a front explanatory view of an embodiment of the present invention, FIG. 2 (1) is a front explanatory view of a manufacturing process of a honeycomb core, and FIG. 2 (2) is a manufactured honeycomb core. It is a perspective view of an important part.

The corrugating apparatus 6 is used in a manufacturing process of a honeycomb core 8 made of plastic or fiber reinforced plastic, which is a planar assembly of hollow columnar cells 7, and has a corrugated belt 9, a sprocket 10 and an induction heating device. 11 and.

Explaining these in detail, first, as a base material sheet, glass resin, Kevlar fiber, carbon fiber, and other base fiber are attached with phenol resin, epoxy resin, polyimide resin, and other resin, and impregnated. The fiber reinforced plastic (FRP) prepreg sheet 1 and the prepreg sheet 1 made of a single plastic are prepared in combination. Then, the ultra-thin foil / film-shaped strip-shaped prepreg sheet 1 wound on the reel R is rewound to be a flat strip-shaped sheet and supplied to the corrugating apparatus 6. Of course, it is also possible to use the single prepreg sheet 1 from the beginning, not depending on the illustrated example.

As shown in FIG. 1, the corrugated belt 9 of the corrugating apparatus 6 is paired up and down, and linear corrugated irregularities are formed in parallel in the lateral direction and continuously in the longitudinal direction. At the same time, a belt-like substantially caterpillar shape having a predetermined width in the lateral direction and an endless shape in the longitudinal direction is formed. The corrugated corrugated belt 9 may have, in addition to the substantially trapezoidal shape shown in the drawing, a substantially triangular shape, a substantially square shape, and various other shapes. In any case, the corrugated belt 9 has a predetermined pitch and height. Has been formed.

Further, as shown in FIG. 1, the sprockets 10 of the corrugate forming device 6 are respectively arranged left and right and rotated so that the upper and lower corrugated belts 9 can travel. That is, two sprocket wheels 10 are provided on the left and right sides of the endless corrugated belt 6 on the upper side.
Two lower endless corrugated belts 9 are provided on the inner right and left sides, respectively, and a driving source (not shown) is provided.
One of the left and right is driven to rotate by, and the other is free. Then, the corrugated belt 9 is driven while being tensioned by such a sprocket 10. It should be noted that in FIG. 1, reference numeral 12 is a pressing plate, which is arranged between the left and right sprockets 10 and which slides on the upper and lower outer sides of the upper and lower corrugated belts 9 that sandwich and feed the prepreg sheet 1 inside. Therefore, the upper and lower corrugated belts 9 are adjusted so that the upper and lower corrugated belts 9 are accurately located at a height level and at an interval for sandwiching the prepreg sheet 1. Reference numeral 13 is a bolt for positioning the holding plate 12.

Next, as shown in FIG. 1, the heating device such as the induction heating device 11 of the corrugate forming device 6 includes the upper and lower corrugated belts 9 sandwiching the prepreg sheet 1 between the left and right sprockets 10 and feeding the prepreg sheet 1. They are provided on the upper and lower outer sides so as to be adjacent to each other and to face each other with a slight space therebetween. In the illustrated example as such a heating device,
The induction heating device 11 is used, and the prepreg sheet 1 is manufactured by a method in which a current is induced in a conductive material by electromagnetic induction utilizing high frequency and heating is performed by the ohmic loss.
It is possible to heat in a very short time. As the heating device, in addition to the induction heating device 11 as described above, a heater type or other various types can be adopted.

Now, the prepreg sheet 1 is continuously folded by the corrugated forming device 6 such as the corrugated belts 9 while being heated by the heating device such as the induction heating device 11 so that the corrugated irregularities are continuously folded. The corrugated plate 4 is formed into a curved shape. Then, the honeycomb core 8 shown in FIG. 2B is manufactured by following the following steps. That is, as shown in (1) of FIG. 2, first, the band-shaped corrugated plate 4 thus formed is cooled and hardened by passing through the cooling unit 14, and then the cutter 1 is cut.
At 5, it is cut into predetermined lengths. Then, in the illustrated example, the adhesive 5 is sequentially applied to the top and bottom of the corrugated surface of the corrugated plate 4 in the lateral direction by a roll coater method. Reference numeral 16 is a tray of the adhesive agent 5, and the adhesive agent 5 in the tray 16 is applied to the corrugated sheet 4 via a pick-up roll 17 and an application roll 18 which are rotated.
Then, the corrugated sheet 4 thus coated with the adhesive 5 and dried and the corrugated sheet 4 not separately coated with the adhesive 5 are alternately arranged so that the tops and the bottoms of the corrugated sheet 4 are aligned with each other to provide a space. Stack in a laminated block. Then, by heating to the melting point temperature of the adhesive agent 5, the adhesive agent 5 is melted and cured, and the corrugated sheets 4 thus stacked are adhered to each other.

In this way, the honeycomb core 8 shown in FIG. 2 (2), which is a planar aggregate of the hollow columnar cells 7, is manufactured. And this honeycomb core 8 is
The cell wall 19 is made of plastic or fiber reinforced plastic (FRP), and the corrugated plate 4 forms the cell wall 19, and the cell wall 19 is formed of a planar assembly of a large number of hollow columnar cells 7 partitioned in independent spaces. The cross-sectional shape of the cell wall 19 and the cell 7 may be a regular hexagon, a triangle, a quadrangle, a trapezoid, or other various shapes. And honeycomb core 8
Has an excellent weight-to-weight strength, high rigidity and strength in addition to light weight, and also has excellent rectifying effect, flatness accuracy, heat retention, and sound insulation, has a large surface area per unit volume, and is easy to mold. It has various characteristics and is widely used for various purposes.

The present invention is constructed as described above. Then it becomes as follows. As shown in Figure 1,
The corrugating apparatus 6 comprises an endless corrugated belt 9 that is paired with a sprocket 10 and that is vertically paired.
It is adopted in combination with a heating device such as the induction heating device 11. Then, the prepreg sheet 1 made of plastic or fiber reinforced plastic is sandwiched between the upper and lower running corrugated belts 9 and fed, and the induction heating device 1
The corrugated plate 4 is formed by being heated by a heating device such as 1 and bent. And (1) of FIG.
As shown in the figure, the corrugated plate 4 thus formed is
The honeycomb core 8 made of plastic or fiber reinforced plastic is manufactured as shown in FIG. 2 (2) by bonding by cooling, cutting, application of the adhesive 5, stacking, and heating and pressing.

Then, according to the corrugating apparatus 6, the following first and second steps are performed. First, the corrugated sheet 4 is successively and continuously formed from the prepreg sheet 1 as described above, and the corrugated sheet 4 is obtained in an extremely short time. Second
In addition, since the corrugated sheet 4 is successively and continuously formed from the prepreg sheet 1 in this manner, it is possible to easily form a line and automate the process.

[0018]

As described above, the corrugating apparatus according to the present invention exhibits the following effects by adopting a combination of a pair of upper and lower corrugated belts that are driven by a sprocket and a heating device. To do.

First, the corrugated sheet is formed in a short time. That is, unlike the corrugating apparatus of the conventional example of this kind described above, the corrugated sheet is not formed by bending the prepreg sheets one by one, but in this corrugating apparatus, the corrugated sheet is sequentially formed from the prepreg sheet. It is continuously molded, and the corrugated sheet can be obtained in an extremely short time, which is excellent in molding cost.

Secondly, it is easy to make a line. That is, in this corrugating apparatus, since the corrugated sheet is successively and continuously formed from the prepreg sheet, it is possible to easily line up and automate the entire honeycomb core manufacturing process. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a front explanatory view of an embodiment of a corrugating apparatus according to the present invention.

FIG. 2 (1) is a front explanatory view of the manufacturing process of the honeycomb core, and FIG. 2 (2) is a perspective view of a main part of the manufactured honeycomb core.

[Fig. 3] Fig. 3 is a front explanatory view of a manufacturing process of a honeycomb core of this type of conventional example, in which (1) is a prepreg sheet and (2) is a prepreg sheet.
The figure shows the process of arranging the prepreg sheet between the racks of the corrugated molding machine. (3) Figure shows the molded corrugated sheet,
(4) The figure shows the process of stacking and adhering corrugated sheets.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Prepreg sheet 2 Corrugate forming device (conventional example) 3 Rack 4 Corrugated sheet 5 Adhesive 6 Corrugate forming device (this invention) 7 Cell 8 Honeycomb core 9 Corrugated belt 10 Sprocket 11 Induction heating device (heating device) 12 Holding plate 13 Bolt 14 Cooling unit 15 Cutter 16 Tray 17 Pickup roll 18 Coating roll 19 Cell wall R reel

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area // B29K 105: 08

Claims (1)

[Claims] 1. A planar aggregate of hollow columnar cells,
A corrugating machine used in the manufacturing process of honeycomb cores made of plastic or fiber reinforced plastic. It is a pair of upper and lower parts, and linear corrugations are formed in parallel and continuously, and endless strips are formed. , A corrugated belt that sandwiches and sends a prepreg sheet of plastic or fiber reinforced plastic between each other, a sprocket that is rotated to the left and right to run the corrugated belts above and below, and between the sprocket on the left and right, A heating device provided adjacent to the outside of the upper and lower corrugated belts sandwiching and sending the prepreg sheet, and the prepreg sheet is heated by the heating device while being heated by the upper and lower corrugated belts. Is formed into a corrugated plate with corrugated concavities and convexities that are continuously bent. Corrugated molding apparatus to.