JPH01321024A - Production of corrugated sheet - Google Patents

Abstract

PURPOSE:To automatically produce a corrugated sheet of complex shape by working a flat sheet to obtain a corrugated sheet, then, pressing it with a forming tool at a stroke. CONSTITUTION:The flat sheet 11 is passed between a upper and a lower roll each of which bites with the other to form a corrugated sheet and worked in a corrugated form to produce a corrugated sheet 12 having a pitch equal to that of a corrugated sheet 10 to be produced. Then this corrugated sheet 12 is set between an upper and a lower forming tool so that the position which is shifted by a prescribed pitch from the center of the corrugation of the corrugated sheet 12 comes into contact with the corner part of the forming tool 9. Shearing and deformation are given by simultaneous pressing to the corrugated sheet 12 to produce a corrugated sheet 10. In this way, the corrugated sheets 10 can be produced in a short time and automatically and mass- production of the corrugated sheet 10 is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a corrugated plate used as a component of a fuel cell, for example.

[Prior Art] Generally, in a fuel cell, a cell (single cell) in which an electrolyte plate is sandwiched between an anode (negative electrode) and a cathode (positive electrode) is stacked with a corrugated plate such as a corrugated separator interposed, and then an upper holder and a lower part are stacked. It has a structure held by a holder, and anno-
Electric power is obtained by supplying oxidizing gas to the electrode and fuel gas to the cathode.

As shown in FIGS. 6 and 7, the above-mentioned corrugated board has recesses 1 and projections 2 in the direction of arrow a alternately formed in the direction of arrow C, and recesses 1 and projections 2 in the direction of arrow C, respectively. On the other hand, it has a complicated shape in which concave portions 3 and convex portions 4 are arranged side by side alternately in the direction of arrow l).

For ease of understanding, the four parts 3 in the direction of the arrow are shown by broken lines in FIG. 7, and a portion d surrounded by solid lines and broken lines is a gap.

Since such a corrugated board cannot be manufactured in one press due to its complicated structure, a pair of corrugated plates each having four parts L and a convex part 2 arranged in the direction of arrow C as shown in FIG. Using the male mold 5 and female mold 6 of Fig. 9 (a)
As shown in the figure, the sheet was manufactured manually by pressing a sheet 7 while turning it over each time and feeding it 1/2 pitch at a time.

[Problems to be Solved by the Invention] However, in the method for manufacturing corrugated boards described above, each board 7 is manually turned over each time and pressed while being fed by I72 pinches, which makes manufacturing extremely difficult. It took a while.

SUMMARY OF THE INVENTION In view of the two actual circumstances, the present invention aims to provide a method for manufacturing a corrugated board that can automatically manufacture a corrugated board in a short period of time.

[Means for Solving the Problems] The present invention processes a flat plate to produce a corrugated plate having the same pitch as that of a corrugated plate, and then converts the corrugated plate into a mold with a mold surface having the same shape as that of the corrugated plate. A method for manufacturing a corrugated board characterized by pressing with a mold, and a method of manufacturing a corrugated board having the same pitch as the corrugated board by processing the flat board after making slits in advance in the part of the flat board to be sheared, the corrugated board The present invention relates to a method for manufacturing a corrugated board, which is characterized in that the press is pressed using a full-size mold having a mold surface of the same shape as that of the corrugated board.

[Function] When a flat plate is processed into a corrugated plate and then pressed with a mold, the amount of elongation and deformation of the corrugated plate during pressing is kept small, so a corrugated plate without breakage at some corners can be manufactured.

Furthermore, by making slits in the flat plate before processing the flat plate into a corrugated plate, there is no need to shear the corrugated plate with a die when pressing, and the excess thickness and hardness of the die can be reduced.

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

FIG. 1 (ω-mount) (C) and FIG. 2 are explanatory diagrams of an embodiment of the present invention.

Reference numeral 8 indicates upper and lower corrugated plate forming rolls that engage with each other, 9 indicates a pair of upper and lower general molds having mold surfaces of the same shape as the corrugated plate IO to be manufactured, 11 indicates a flat plate, and 12 indicates a corrugated plate.

First, the flat plate 11 is made into a wavy shape by passing the flat plate II between the upper and lower corrugated sheet forming rolls 8 that engage with each other.
A corrugated sheet 12 having the same pitch as the corrugated sheet 10 to be manufactured is made (FIG. 1(a)).

Next, the manufactured corrugated sheet I2 is placed one inch from the center of the corrugated sheet 12.
Set it between the two lower full mold molds 9 so that it contacts a part of the corner of the full mold mold 9 at a position shifted by /8 pitches, and press at once using the full mold mold 9. Possibly corrugated plate 12
Shearing and deformation are applied to the corrugated plate 10 to produce the corrugated plate 10 (see Fig. 1 and Fig. 2).

At this time, the reason why the flat plate 11 is not directly pressed with the full mold mold 9 is because the shape of the corrugated plate IO is very complicated.
This is because the amount of elongation deformation given to the flat plate 11 by the repeated pressing becomes too large, resulting in a defective corrugate plate 10 with breakage at some corners, making it impossible to manufacture a usable corrugate plate 10.

Therefore, in the present invention, in order to prevent breakage of the corner portions due to pressing, the flat plate 11 is processed into a corrugated plate 12 in advance to approximate the shape of the corrugated plate IO, thereby suppressing the amount of elongation deformation due to the pressing. As a result, it became possible to manufacture a defect-free corrugate board 10 in one press without breaking a part of the corner.

In this way, there are two steps: the step of processing the flat plate II to make the corrugated sheet 12, and the step of pressing the corrugated sheet 12 with the mold 9 of the full mold at once.
By manufacturing corrugated board IO in two automatable steps, corrugated board IO can be manufactured automatically in a short time.
It becomes possible to manufacture O, and mass production of corrugated board IO is realized.

Figure 3 (a) (mountain) (C1 (small), Figures 4 and 5 are explanatory diagrams of other embodiments of the present invention.

3 is a pair of upper and lower rotating shafts, 14 is a pair of upper and lower roller cutters that are installed in plural numbers at a required interval in the longitudinal direction of each rotating shaft 13 and make a slitting knife 15 in a certain range in the circumferential direction; 16 is a key for fixing the rotating shaft 13 and the roller cutter 14, and 17 is a slit.

In this embodiment, before processing the flat plate 11 in FIG. 1(a) into a wavy shape, a step is added in which a slit 17 is made using a roller cutter 14 in the portion of the flat plate 11 to be sheared by the mold 9 of the overall mold. It is.

By making the slits 17 in the flat plate 11 in advance in this way, when the corrugated sheet 12 is pressed by the mold 9 of the full mold, the mold 9 does not have to shear the corrugated sheet I2, so Processing force is reduced, and there is no need to take a large amount of extra thickness to ensure the strength and rigidity of the full-size mold 9, and there is no need to increase the hardness of the full-size mold 9.

Therefore, the press equipment for the entire mold 9 can be made inexpensive and compact, and since the mold 9 is lightweight, it is also possible to increase the speed.

It should be noted that the method for manufacturing a corrugated board of the present invention is not limited to the above-mentioned embodiments, and the method of processing a flat plate into a corrugated board is arbitrary, and the use of the corrugated board does not matter. Of course, various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, according to the method for manufacturing a corrugated board of the present invention, various excellent effects as described below can be achieved.

(1) After processing a flat plate to make a corrugated sheet, the corrugated sheet is pressed at once using a full-form die, making it possible to automate the production of corrugated sheets with extremely complex shapes. Moreover, mass production becomes possible.

(2) After making slits in the flat plate, we added the flat plate to make a corrugated plate, and then pressed the corrugated plate at once with a full-form die, so when pressing, we used a full-size die. It is no longer necessary to shear the corrugated sheet, and the excess thickness and hardness of the total mold can be reduced, making it possible to downsize the press equipment and reduce costs, and furthermore, the total mold is lighter. This makes it possible to increase the speed of the press.

[Brief explanation of the drawing]

Fig. 1 (ω-mount) (C) is an explanatory diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the relationship between the mold and the corrugated plate (in Fig. 1), and Fig. 3 (ω-mount ) (Small is an explanatory diagram of another embodiment of the present invention, No. 4
The figure is an explanatory view of the roll cutter in Fig. 3 (a), Fig. 5 is an explanatory view of the V-■ arrow in Fig. 4, and Fig. 6 is an explanatory view of the corrugated board.
FIG. 7 is a view taken in the direction of the {circle around (1)} direction in FIG. 6, FIG. 8 is an explanatory diagram of a conventional device, and FIGS. 9(a) and (b) are explanatory diagrams of a conventional method. In the figure, 8 is a corrugated plate forming roll, 9 is a mold, 1O is a corrugated plate, 11 is a flat plate, 12 is a corrugated plate, 13 is a rotating shaft, 14 is a roller cutter, ! 5 indicates a slit sword, 16 indicates a key, and 17 indicates a slit. Figure 2 Figure 6 Front Figure 1 (G) [b] Figure 4

Claims (1)

[Claims] 1) After processing a flat plate to produce a corrugated sheet with the same pitch as that of a corrugated sheet, the corrugated sheet is pressed using a full-size mold having a mold surface of the same shape as the corrugated sheet. A method for manufacturing a corrugated board, characterized by: 2) After making a slit in advance in the part of the flat plate that will be sheared,
A method for manufacturing a corrugated plate, which comprises processing a flat plate to produce a corrugated plate having the same pitch as the corrugated plate, and pressing the corrugated plate using a full-size mold having a mold surface of the same shape as the corrugated plate. .