JP2001170999A - Method for folding and forming biodegradable resin- treated thin plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for simply, easily, effectively and efficiently folding and forming a biodegradable resin-treated thin plate material. SOLUTION: The method for folding and forming the biodegradable resin- treated thin plate material comprises the steps of steaming the biodegradable resin-treated thin plate material 1 to a soft material containing warm water, holding and fixing a base surface 12 and folding a folded surface 13 while heating the entirety, continuously heating in the folded state to evaporate the contained moisture, further heating and nipping the inner and outer surfaces of the surface 12 and the surface 13, and then cooling them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of bending a thin sheet material when forming an open box or a body or a lid of a box body from a thin sheet treated with a biodegradable resin. Things.

[0002]

2. Description of the Related Art In recent years, a biodegradable resin layer has been applied to the front and / or back surface of a thin plate body made of plant material such as wood or bamboo instead of plastic products due to the problem of disposal.
It has been proposed to use a plate material formed by using a plant material as a chip and using a biodegradable resin as a binder, and in particular, is expected to be used for disposable containers and the like.

[0003] By applying a biodegradable resin layer, while maintaining and fixing the molding of the thin plate main body, it also acts as an adhesive if the strength is supplemented or heated, thereby improving the fragrance retention, moisture permeability and waterproofness of the plant material. On the other hand, the treated surface has the advantage that the treated surface can prevent the smell of plant material, can be decomposed by microorganisms in the soil at the time of disposal and can be naturally treated, and can be incinerated at a low temperature and the combustion gas is harmless.

However, as a method of forming a box (container, lid, etc.), only a conventional method of forming from wood or the like and a plate made of wood or the like can be considered, and a biodegradable resin treatment is performed. If the thin plate, which is a characteristic of the obtained sheet material, has strength and is excellent in shape maintenance, it can be formed by bending, but a bending forming method has not been proposed yet.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of bending and forming a thin plate material subjected to a biodegradable resin treatment in a simple, easy, reliable and efficient manner. It is.

[0006]

SUMMARY OF THE INVENTION The present invention provides a flexible material containing hot water by steaming a thin plate treated with a biodegradable resin.
Bending the bent surface by clamping the base surface while heating the whole, bending the bent surface, continuing heating to evaporate the contained water, heating and clamping the base surface and the inner and outer surfaces of the bent surface, and then cooling It is characterized by the following.

Further, the means for clamping and fixing the base surface may be a molding die, and the base surface may be formed. Further, the thin plate material steamed with a biodegradable resin interposed on the base surface may be clamped and fixed. .

[0008] By steaming the sheet material to which the biodegradable resin has been applied, the sheet material becomes flexible because of its high temperature and containing moisture. On the other hand, the biodegradable resin is also softened by receiving heat, and becomes thin. If water enters, it weakens the bonding strength.

Therefore, both the thin plate material and the biodegradable resin are softened to facilitate bending, and if the base surface is clamped and fixed, the bending becomes reliable and beautiful, and the flexibility is maintained by heating. Is what you do.

As the heating is continued, the temperature of the sheet material rises to a higher temperature, and the moisture evaporates beyond 100 degrees Celsius and is removed. The sheet material and the biodegradable resin are sandwiched by clamping the base surface and the bent surface. Are fused again, perform a shaping action, and are cooled and the molding is stabilized and fixed.

[0011] By forming the means for clamping the base surface as a molding die, a surface having uneven strength is formed on the base surface, which can be used for forming a box or a cylinder by positioning the surface with the bottom surface of the box. By stacking and fixing a steamed thin plate with biodegradable resin interposed on the surface, the part is given a strength as a thicker surface than the bent surface,
It can be used as the bottom of a box or cylinder.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show an example of a thin wood or bamboo sheet 1 treated with a biodegradable resin used in the present invention. FIG. 1 is a view in which a biodegradable resin 3 is coated on the surface of a thin plate base material 2 and is obtained by applying the biodegradable resin 3 or applying a film. Can be applied.

FIG. 2 shows a thin plate 1 obtained by polymerizing the thin plate bases 4 and 4 and using a biodegradable resin 3 as an adhesive. In this case, the biodegradable resin 3 on the front and back surfaces of the thin plate 1 is used. May be only one surface or only the joining surface of the thin plate substrates 4 and 4. FIG. 3 shows a chip 1 made of a plant material, which is formed into a thin plate material 1 using a biodegradable resin 3 as a binder.

FIG. 4 is a simplified front view showing an example of an apparatus for performing molding according to the present invention.
The bent surface blocks 13 and 13 are attached to the base 11 such that the bent blocks 13 and 13 can be turned upside down around the side end of the base surface base 12 with a gap at both ends of the base surface base 12. Further, a holding block 14 is installed on the base table 12 so as to be able to move up and down, and the holding block 14 has a lower surface and a vertical peripheral side surface that are almost the same shape as the base table 12. A heating means 15 such as a heating wire is provided in the base surface base 12, each bent surface block 13 and the holding block 14, and the contact surface with the biodegradable resin-treated thin plate material 1 is heated to an appropriate temperature. It can be heated.

Therefore, the central portion of the thin plate material 1 which has been subjected to the biodegradable resin treatment is positioned on the base surface base 12 which is brought to a high temperature by steaming, bending down the bent surface block 13 in a state where moisture is contained, and setting the horizontal position. Then, the presser block 14 is lowered, and the thin plate 1 is clamped and fixed to the base table 12. Next, in this state, the bent surface block 13 is erected. As the bent surface block 13 is erected, both ends of the thin plate material 1 are pressed with the boundary between the base surface base 12 and the holding block 14 as a boundary. It stands up and bends (Fig. 5).

At this time, the base 12 and the holding block 14
Further, since the bent surface block 13 is heated to a high temperature by the heating means 15, the thin plate material 1 is further heated, the flexibility is maintained, the biodegradable resin 3 is also softened, and moisture is added to the thin plate base material 2 or 4. And the biodegradable resin 3 becomes loose,
They bend freely without any problems.

If the heating is continued, the moisture contained in the thin plate material 1 evaporates, the biodegradable resin 3 also dissolves, and the base plate 12, the bent surface block 13 and the pressing block 14 press the thin plate. The plate material 1 receives the shaping action, and at the same time, the biodegradable resin 3 is melted again into the thin plate base material 2 or 4.

That is, due to the bending, the thin plate base material 2 or 4 freely expands and contracts including the bent portion or other portions, the biodegradable resin 3 also softens and the bond is weakened to follow, and wrinkles and folds are formed. Even if a portion is formed, it is pressed and shaped as it is by the clamping pressure after evaporation of the water, and the molding is maintained by the adhesive action of the biodegradable resin 3 and fixed by cooling.

FIG. 6 is a longitudinal sectional front view showing another embodiment, in which uneven portions 16 and 17 corresponding to the clamping surfaces of the base base 12 and the holding block 14 are formed. By forming irregularities on the surface to reinforce the strength, this surface can be used as the bottom surface of the container or the like.

FIG. 7 is a front view showing another embodiment, in which another thin plate material 1A is laminated and adhered in order to reinforce the surface corresponding to the bottom surface of a container or the like located on the base table 12. , Another sheet material 1A is similarly steamed and stacked,
And a biodegradable resin 3 is interposed between them.

If the biodegradable resin 3 treated with the biodegradable resin is coated on one of the polymerized surfaces of the thin plate 1 and another thin plate 1A, the biodegradable resin 3 is interposed again. No need.

[0022]

As described above, according to the present invention, it is possible to reliably and easily perform bending and molding of a thin plate material subjected to a biodegradable resin treatment. It contributes to processing into containers and the like that have solved the problem of disposal by utilizing waterproofness.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a sheet material subjected to a biodegradable resin treatment used in the present invention.

FIG. 2 is a cross-sectional view showing an example of a sheet material subjected to a biodegradable resin treatment used in the present invention.

FIG. 3 is a cross-sectional view showing an example of a sheet material subjected to a biodegradable resin treatment used in the present invention.

FIG. 4 is a front view showing an example of a bending apparatus used in the method of the present invention.

FIG. 5 is a front view showing one step of the method of the present invention.

FIG. 6 is a longitudinal sectional front view showing another example of the bending apparatus used in the method of the present invention.

FIG. 7 is a front view showing another example of the bending apparatus used in the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Thin plate material 2, 4 Thin plate base material 3 Biodegradable resin 5 Chip 11 Base 12 Base surface stand 13 Bent surface block 14 Holding block 15 Heating means 16, 17 Uneven portion

Claims (3)

[Claims] 1. A thin material which has been treated with a biodegradable resin is steamed into a flexible material containing hot water, the base surface is clamped and fixed while heating the whole, the bent surface is bent, and heating is continued in the bent state. A method of bending and forming a thin plate material which has been treated with a biodegradable resin, characterized in that the moisture contained therein is evaporated, the inner and outer surfaces of the base surface and the bent surface are heated and clamped, and then cooled. 2. The method according to claim 1, wherein the means for clamping and fixing the base surface is a mold, and the base surface is formed. 3. The bent forming of a biodegradable resin-treated thin plate according to claim 1, wherein the steamed thin plate is sandwiched and fixed on the base surface with a biodegradable resin interposed therebetween. Method.