JPH01206023A - Composite board material and manufacture thereof - Google Patents

Abstract

PURPOSE:To reinforce a board in its slant direction and to eliminate joint line on the board surface by making a belt shaped material into a cylindrical tube in helically winding and then making this flat to join the inner surfaces thereof to each other, and by joining another board material to at least the one surface of the board material obtained. CONSTITUTION:The belt-shaped material (1A) is wound helically so as to be a cylindrical pipe (2A). In this example, a duplex tube is made because the belt shaped material is superposed at each halve and then the duplex tube is made flat. An assembly of three bending rollers, preferably a diameter defining roller are arranged so as to mold the belt-shaped material (1A) to be a helical shape, and it is preferable that the process for making the cylindrical tube to be a flat may be employed in compression by for example an assembly of press instruments. At this time, any methods should be taken whether a material with joining property is inserted into the inner part, an adhesive is applied on the inner surface or the flat material is raised in its temperature. In the case where the composite board material is worked into the board material without any joint lines, another board material without joint lines should be joined to the board surface. By this constitution isotropic property can be improved and the composite board material reinforced in its slant direction can be obtained from the narrow and the few number of an original board.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a composite plate material and a method for manufacturing the same.

(Prior Art) Conventional composite plates have been bonded by stacking plates and pressing them with a press or rolling them between cylindrical rolls, with or without applying an adhesive between them.

(Problems to be Solved by the Invention) Composite board materials9, for example, like plywood boards, have improved isotropy by improving the difference in properties between the length and width directions of the board. However, considering that these materials often fracture diagonally due to shear stress, the length direction of the blank board rather intersects the length direction of the product, and fibers or Although it is desirable for the crystals to be aligned, there is no method for manufacturing such a composite plate material, and no such composite material exists.

Composite board materials are also available, such as clad boards.

(Materials with different qualities are combined into one temporary sheet in an attempt to obtain better performance and manufacturing costs than a single homogeneous material. In this case, the finished width of the composite sheet is approximately equal to the width of the blank sheet.) In order to obtain a wide composite board material, a wide blank board is required, and it is not easy to prepare the blank board.

The present invention provides a composite board material in which the board is strengthened in the diagonal direction, and its 5! The first purpose is to provide a manufacturing method.

A second object of the present invention is to provide a wide composite plate material and a method for manufacturing the same.

(Means for solving problem 1) In order to achieve the object 1, the present invention is constructed as follows. That is, (1) as shown in FIGS. 1, 2, and 4, the strip material I
AI? , a first step of spirally winding into a 9-cylindrical tube 2A;
This is a method for manufacturing a composite plate material, which includes a second step of flattening the circular tube and joining the inner surface, and other incidental steps. Figure 1 shows a first step for manufacturing a circular pipe 2A from a strip material IA.
It shows the process.

In the example shown in this figure, the strips are overlapped by 1/2 each, creating a double pipe. In this case, the product after rolling is made of 4 sheets whose longitudinal directions intersect with each other with the center of the composite board as the boundary.
It becomes a composite plate material of N.

When forming into a circular tube, as shown in Fig. 2.

The strip materials IA may be joined by butting their sides together without overlapping each other. In this case, the product after rolling will be a composite plate material of 21 layers in which the length directions of the materials intersect with each other.

When manufacturing the strip material IA into a circular pipe, it is sufficient that the two strip materials can be treated as one body, and they do not necessarily need to be joined to each other.For example, as shown in Figures 3 and 5, The plate-shaped material IA and the band-shaped material IC having a bonding function are wound with their positions shifted in the width direction.

Both may be kept in a tubular shape by a band-shaped IC having a joining function.This band-shaped IC having a joining function is constructed so that both sides have a joining function.

A composite circular tube can be obtained by wrapping another band-like material around the outer surface of the circular tube 2C so as to leave one inch apart.

To form the strip material IA into a spiral shape, follow the steps in Figures 1 to 5.
As shown in the figure, at least three bending roll sets 5A,
5B, 5C, and preferably a diameter determining roll 6 are provided.

The process of flattening the circular tube is not particularly limited, but it is preferable to press it with a press tool set 7 as shown in No. 6I2I, for example.Of course, it is also possible to flatten it with a rolling roll set 8.

The flat material 3 is either pressed by a press tool set 7 to join the inner surfaces as shown in FIG. 4, or subsequently rolled between rolling rolls 8118 as shown in FIG. 7 or 8. Join the inner surface. At this time, to facilitate joining, either insert a material with a joining function inside, or apply adhesive to the inner surface.

Either raise the temperature of the flat material, press tool set 7, rolling rolls, etc.
, II 8. Figure 7 shows an example of rolling with the circumferential direction of the tube as the traveling direction, and Figure 8 shows an example of rolling with the longitudinal direction of the tube as the traveling direction. In this example, one or both of these methods can be used in consideration of the characteristics required for the product.

(2) The present invention also includes a first step of spirally winding the strip material IA into two circular tubes 2A as shown in FIGS. Next, a second step is performed in which the belt-shaped material IB is spirally wound around the outer surface of the circular tube 2A in the opposite direction to the first step, and the nine belt-shaped materials IA and IB are integrated, and the circular tube 2 thus obtained is This is a method for manufacturing a composite plate comprising a third step of flattening and joining the inner surfaces and other incidental steps, and a composite plate manufactured in this manner.

In other words, the steps other than the second step shown in FIGS. 9 and 10 are as described in item (1) above, so to describe the second step, outside of the circular tube 2A (7) formed in the previous step, Face tZ
The strip material 2B is bent using O-ru MJ5A, 5B, and 5C and wound spirally around a circular tube in the opposite direction to the first step. The overlap margin of the outer circular tube 2B is not particularly limited, but it is desirable to make it equal to the overlap margin of the inner tube in order to maintain isotropy and homogeneity of the composite plate material. As a result, the band material IB is tightly wound around the two circular tubes 2A, and the joining of the inner tube 2A and the outer tube 2B is promoted. This presser roll 9 may be the same as the diameter-setting roll 6 described above, but it is preferable that it has the function of tightly wrapping or joining the outer pipe 2B around the inner pipe 2A. 2. For example, by intervening a bonding medium such as a strip IC or adhesive having a bonding function, or
It is desirable to increase the temperature of either or both of the inner tube 2A and the outer tube 2B to promote their bonding.In the method described in item (2), the inner tube 2A and the outer tube 2B are heated before the pressing process or the rolling process. Even if they are not joined to each other, it is sufficient that they can be handled as one until the joining process, and the two can be completely joined by pressing or rolling.

(3) Furthermore, the present invention includes a first step of spirally winding the strip material IA to form a 9-cylindrical tube 2A as shown in FIGS. The second step is to spirally wind the strip material IB on the outer surface of the circular tube 2 in the opposite direction and join the two strip materials IA and IB, and then cut the thus obtained circular tube 2 into a plate-like body. 4, an 11th step of rolling the plate-like product 4 obtained in this way into a flat plate product, and other incidental processes. This is a composite board material manufactured by

The outer circular tube 2A and the inner circular tube 2B have a bonding force that is strong enough to prevent them from separating when cut, but the ends are fixed with a stopper 9 and the overlapping material is rolled and bonded so as not to disintegrate. Part II! ! is as described in paragraph (1) or (2).

(Function) By configuring as described above, it is possible to produce a composite plate material in which the length direction of the strip material is inclined at a predetermined angle with respect to the length direction of the composite plate material. Band-shaped materials generally exhibit anisotropy, and are usually strong in the length direction and weak in the width direction.

Such anisotropy is inclined in opposite directions with respect to the length direction of the composite plate, and is the direction in which the maximum shear stress acts against the tensile force applied in the length direction or width direction of the composite plate.

That is, 2 reinforcement pJ in the direction inclined at 45 degrees to the tensile stress,
It is most desirable to configure the structure so that the fibers, crystal grains, and grains are vertical.

Further, the present invention makes it possible to obtain a composite plate material having a width wider than the width of the strip material as a raw material by spirally forming the strip material. When tilted at 45 degrees or 60 degrees with respect to the length of the tube, the width of the composite plate is 1.4W and 2.0W, respectively, by cutting in the length direction of the circular tube. It becomes OW.

(Example 1) Use 9 50mm wide slion tape as the strip material.

With the adhesive side on the inside, 1/2 of the width was overlapped and spirally wound as shown in FIG. 1, and the circular tube was first pressed to obtain a composite plate material. This composite plate material was composed of four layers, the two widths were 35 mm, and the inclination of the sullion tape in the longitudinal direction with respect to the longitudinal direction was about 45 degrees. A 5 mm notch was made in this composite material perpendicular to the tensile direction, and the tensile strength in the length direction and width direction was determined. Here for comparison.

Four layers of the same Slion tape are made with the same length.

Similar notches were made to measure the tensile strength in the length and width directions. If the tensile strength of this composite board in the width direction is 1, then the tensile strength in the length direction is 1°2, and the tensile strength of the diagonally stacked composite board is determined by its length and width. Both directions were significantly higher at 4.5.

(Example 2) Use 9 50mm wide slion tape as the strip material.

With the sticky side facing inside, 172 pieces of the same width were overlapped and wound spirally to form a circular tube, as shown in Figure 1.

Next, as shown in FIG. 9, the same sullion tape was spirally wound in the opposite direction and the circular tube was pressed to form a composite plate material. This composite board is composed of 8 layers, and the width of 2 is 37
mm, and the inclination of the sullion tape in the longitudinal direction with respect to the longitudinal direction was about 45 degrees.

A 5 mm notch was made in this composite material perpendicular to the tensile direction, and the tensile strength in the length direction and width direction was determined. In order to compare this, the same sullion tape was made into 8 layers in the length direction, similar notches were made, and the tensile strength in the length direction and width direction was determined.

Assuming that the tensile strength of this composite plate material in the width direction is 1.

The tensile strength in the longitudinal direction was 1.2, and the tensile strength of the diagonally stacked composite plate material was significantly high at 5 in both the length and width directions.

(Example 3) A thin paper material coated with an adhesive on one side of a cardboard strip material is rolled into a spiral shape while being adhered to the cardboard strip material while being shifted in the width direction of the cardboard material as shown in FIGS. 3 and 5. After making it into a circular tube and applying glue to the inner surface of the circular tube.

It was pressed to make it flat and the inner surfaces were joined to obtain a composite paper board.

(Example 4) As shown in Fig. 1, a band-shaped vinyl adhesive tape material is spirally wound to form a circular tube, and as shown in Figs. 9 and 10, the above-mentioned band-shaped vinyl adhesive The tape material was spirally wound in opposite directions to join the two strip materials, and the thus obtained circular tube was pressed to make it flat, and the inner surfaces were joined.

(Embodiment example 1) Thickness: 0. A polyethylene strip of 5 mm and width 40 mm is heated to about 120 to 160°C and wound spirally as shown in Figure 1.9 The overlapped portion is rolled into roll sets 5A and 5B.
After joining and bending the pipes while pressing them between five layers to form nine circular tubes, as shown in Fig. 9, a polyethylene strip similar to that described above was placed on the outer surface of the circular tubes and heated to 120 to 160°C. The two strips are wound spirally in opposite directions to join them, and then pressed into a flat shape using a circular press.

The flat material thus obtained is heated to 120 to 160° C. and rolled into a flat plate to obtain a polyethylene composite plate.

(Embodiment example 2) Thickness 1. A polypropylene strip of 0 mm and 100 n+m is heated to approximately 120 to 160°C and wound spirally as shown in Figure 1. 9 The overlapping portion is pressed with a roll tube and joined and bent to form a circular tube. After that, as shown in FIG. 9, a polypropylene strip similar to that described above is heated to 120 to 160° C. and spirally wound in the opposite direction to join the two strips, as shown in FIG. The circular canal is then incised to form a plate-like body, which is then incised in the longitudinal direction.
The plate thus obtained is heated to 120 to 160°C and rolled into a flat plate to obtain a polypropylene composite plate.

(Effects of the Invention) Since the present invention is configured as described above, it has the following effects. That is, it is possible to improve the isotropy by improving the difference in properties between the length direction and the width direction of the plate material. In particular, it is possible to manufacture composite plates that prevent the progression of fracture due to the maximum shearing force that intersects the width direction or length direction, and composite plates that are reinforced in the diagonal direction of the plate. Moreover, various wide composite board materials can be obtained from a small number of narrow blank boards.

The present invention has made it possible to manufacture a composite plate material having fibers or crystal grains that cross in opposite directions in the longitudinal direction of the composite plate. Such a composite board material has excellent material properties not found in conventional board materials or composite board materials, and can be used alone or as a strip-shaped material overlaid with conventional board materials.

The method of the present invention can be applied to any material that can be bent. That is, it can be applied not only to metal materials and polymer materials, but also to inorganic materials that can be bent and joined, wood, food materials, and composites of these different materials.

Moreover, a composite material containing reinforcing fibers or a material whose anisotropy is emphasized by rolling or extrusion can be used for the belt-shaped material of the present invention.

[Brief explanation of the drawing]

1 to 10 are explanatory diagrams of the present invention, and the first
Figures 5 to 5 show the 6th step when forming a belt-shaped body into a circular tube.
Figures 7 and 8 show the case of rolling a flat material, Figures 9 and 10 show the case of wrapping a strip material around the inner pipe, and Figure 10 shows the case of lengthening the circular pipe. This is a case where the incision is made in the horizontal direction. 1, IA, IB, IC: Strip material. 2. 2A, 2I3. 2C: Circular tube. 3: Flat material. 4: Plate body. 5 AT 5 B, 5 C: Roll set. 6: Diameter determining roll. 7: Breath tool set. 8: Roll set.

Claims (1)

[Claims] 1. A first step of spirally winding a strip material to form a circular tube;
A method for manufacturing a composite board comprising a second step of flattening the circular tube and joining the inner surfaces, and other incidental steps. 2. A composite board manufactured by the method according to claim 1. 3. A first step of spirally winding the strip material to form a circular tube;
A second step involves spirally winding a strip material around the outer surface of the circular tube in the opposite direction to integrate both strip materials, a third step involves flattening the thus obtained circular tube and joining the inner surfaces, and other steps. A method for manufacturing a composite board comprising ancillary processes. 4. A composite board manufactured by the method according to claim 3. 5. A first step of spirally winding the strip material to form a circular tube;
A second step of spirally winding the strip material in the opposite direction around the outer surface of the circular tube and joining both the strip materials, and a third step of cutting the thus obtained circular tube to obtain a plate-shaped body. A method for producing a composite plate material, comprising a fourth step of rolling the obtained plate-like body into a flat plate, and other incidental steps. 6. A composite board manufactured by the method according to claim 5.