JPS6227979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a postform processing method for a thermosetting resin plate, and more specifically, the present invention relates to a postform processing method for a thermosetting resin plate A, and more specifically, a thermosetting resin plate A having a curved surface portion 1 at the end thereof for outward bending. At the same time, in order to bend the thermosetting resin plate A inward, the thermosetting resin plate A is placed on a plate-shaped formwork 2 which is bent freely into an L-shape by raising one side around the center part. The edges and center of the thermosetting resin plate A are locally heated, and the surface of the thermosetting resin plate A is heated using a roller 4 having a rotating shaft 3 in the width direction of the formwork 2 and moving in a direction perpendicular to the width direction. The mold frame 2 is bent into an L-shape while pressing and rotating the upper part, and the thermosetting resin plate A is preformed so that an inner bent part 5 and an outer bent part 6 are formed, and then the thermosetting resin is Board A
post-form processing of a thermosetting resin plate which is finally formed on an L-shaped core material 7 by a roller 4 that has a rotating shaft 3 in the width direction of the core material 7 and moves in a direction perpendicular to the width direction. It is related to the method.

In the conventional post-form processing method for thermosetting resin plates, the temperature control is on/off control, and because it is in the form of a single furnace, it is easily affected by the outside temperature, especially in the winter. There is a temperature drop of 10 to 20 degrees Celsius due to the inflow of outside air, and there are many variations in temperature, and the bending method is unnatural, as shown in Figure 1 a and b, where it is twisted while being bent and then returned to its original shape. It was so shaped that the way it was bent didn't make sense. Therefore, in this method, bending defects such as cracks and punctures frequently occur in the thermosetting resin plate A, and outward bending and inward bending cannot be performed at the same time.

The present invention has been made in view of the above points, and its purpose is to be able to bend a thermosetting resin plate inward and outward at the same time, and to bend it in a logical manner. Furthermore, the present invention provides a postform processing method for a thermosetting resin plate with less variation in heating temperature.

Hereinafter, the present invention will be explained in detail with reference to the embodiments shown in FIG. 2 and FIGS. 3a and 3b. Reference numeral 2 is a plate-shaped formwork, which has curved surface parts 1 on the upper surface of both ends and is divided into two parts in the length direction at the center, and by raising one part upwards from the center part, it forms an L-shape. It can be bent freely. A is a thermosetting resin board such as a melamine resin decorative board, and thermosetting resin board A
has the same width as the formwork 2, and is sized such that both ends protrude slightly laterally when placed on the formwork 2. A heater 8 locally heats the center and both ends of the thermosetting resin plate A placed on the formwork 2. 4 is a roller which has a rotating shaft 3 in the width direction of the formwork 2, has the same length as the width of the formwork 2, and moves in a direction perpendicular to the width direction. Then, by pressing the central part of the locally heated thermosetting resin plate A with the roller 4 and bending the formwork 2 into an L-shape, the thermosetting resin plate A is bent inward. By moving the roller 4 while pressing the end of the thermosetting resin board A, the end of the thermosetting resin board A is bent outward along the curved surface 1 of the formwork 2, and becomes thermosetting. The inner bent portion 5 and the outer bent portion 6 are formed on the resin plate A, and the preforming is completed. Next, for final shaping, the bent thermosetting resin plate A is placed on the L-shaped core material 7, and is moved over the thermosetting resin plate A while pressing and rotating the rollers 4. As a result, a thermosetting resin plate A that can be closely attached to the surface of the core material 7 is formed, and the final molding is completed.

FIG. 4 shows a heater roller 40 incorporating a heater 8 as the heater 8 in the present invention, which can heat only the contact area of the thermosetting resin plate A placed on the formwork 2, thereby preventing local heating. I'm trying to do it well.

FIG. 5 shows another embodiment of the present invention, in which a film heater 80 is used as the heater 8, and the film heater 80 is brought into close contact with the surface of both ends and the center of the thermosetting resin plate A. Local heating is performed, thereby making it possible to more reliably prevent variations in heating temperature.

In the case shown in FIGS. 6a and 6b, the surface shape when the formwork 2 is bent into an L-shape is made to be the same as the surface shape of the core material 7, so that the preforming can be carried out on the formwork 2. The final molding is carried out at the same time, and the thermosetting resin plate A that has been bent and formed on the formwork 2 is directly bonded to the core material 7.

7 to 9 show a method of forming the curved surface portion 9 on the core material 7. FIG. In the conventional method, the curved surface portion 9 was formed on the core material 7 by cutting the wood, but the yield was poor. In order to improve the yield rate and to easily form the curved surface portion 9, a method is shown in FIGS. 7 to 9. That is, as shown in FIG. 7, soft tape skirts 11 are extended from both sides of a hard tape body 10 having a curved surface 9, and an adhesive 12 is attached to the bottom surface.
The tape body 13 is formed by coating the tape body 13.
As shown in FIGS. 8a and 8b, one of the tape skirts 11 is bent downward and adhered to the square corner 71 of the core body 70 formed by combining the wooden members 14. and a ninth portion having a curved surface portion 9.
This forms a core material 7 as shown in the figure. This eliminates the need to cut the wood to form the curved surface portion 9.

As described above, the present invention has a thermosetting resin plate placed on a plate-shaped formwork that has a curved surface at the end and can be bent into an L-shape by raising one side around the center. The edges and center of the thermosetting resin plate are heated locally, and the surface of the thermosetting resin plate is pressed with a roller that has a rotation axis in the width direction of the formwork and moves in a direction perpendicular to the width direction. While moving, the formwork is
By bending the thermosetting resin plate in a letter shape, the inner bending part is formed at the center bend of the formwork, and the outer bending part is formed at the curved surface, so that the thermosetting resin plate can be bent inwards and outwards. In addition, since only the edges and center of the thermosetting resin plate are heated locally, variations in heating temperature can be prevented, and the formwork and core can be heated at the same time. Since the thermosetting resin plate is bent and formed by a roller that has a rotation axis in the width direction of the material and moves perpendicular to the width direction, the bending method makes sense and prevents cracks in the thermosetting resin, punctures, etc. This has the effect that bending defects will not occur.

[Brief explanation of the drawing]

FIGS. 1a and 1b are explanatory diagrams showing how to bend a conventional thermosetting resin plate, respectively. FIG. 2 is a side view of a thermosetting resin plate according to an embodiment of the present invention in a state where it is locally heated. Figures 3a and 3b are respectively perspective views showing the state in which the same thermosetting resin plate is placed on a formwork and preformed, and the thermosetting resin plate is placed on a core material and final formed. 4 is a side view showing a state in which the thermosetting resin plate is locally heated by a heater roller; FIG. 5 is a side view showing another embodiment of the present invention; FIG. 6 Figures a and b are side views of a thermosetting resin plate that has been preformed and final formed simultaneously on a formwork; 7 to 9 are explanatory diagrams showing a state in which a curved surface portion is formed using a tape body on a core body according to an embodiment of the present invention, in which A is a thermosetting resin plate, 1 is a curved surface portion, and 2 is a mold. frame, 3 is the rotation axis,
4 is a roller, 5 is an inner bending portion, 6 is an outer bending portion, and 7 is a core material.

Claims (1)

[Claims] 1 A board that has a curved surface at the end for outward bending of the thermosetting resin board, and is bendable into an L-shape by raising one side around the center to bend the thermosetting resin board inward. A thermosetting resin plate is placed on a shaped formwork, and the edges and center of the thermosetting resin plate are locally heated. The moving roller presses and rotates on the surface of the thermosetting resin plate, and the formwork is
The thermosetting resin plate is preformed by bending it into a letter shape so that an inner bent part and an outer bent part are formed, and then the thermosetting resin plate is placed on an L-shaped core material and the width of the core material is bent. A post-form processing method for a thermosetting resin plate, which is formed by final forming using a roller having a rotation axis in the direction and moving in a direction perpendicular to the width direction.