JPH058302A - Plate forming method - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the bending strength of a laminated molded plate obtained by placing a mixture of a thermosetting resin and cement on the upper surface of a metal reinforcing plate. [Structure] A metal reinforcing plate 16 having an upright portion 36 having a pointed corrugated shape is placed on a lower mold 15, a plate material 13 extruded from an extruder is placed on this, and an upper mold 18 is lowered. Compress and mold. The bending strength of the laminated molded plate thus obtained is significantly improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, as a plate material obtained by extrusion-molding a mixture of a thermosetting resin and cement and laminating a metal reinforcing plate on the mixture, particularly a floor material for installing OA equipment. The present invention relates to a suitable plate material forming method.

[0002]

2. Description of the Related Art FIGS. 6 to 8 are perspective views of a part of a conventional reinforcing plate. Conventionally, in this type of panel, a large number of mountain-shaped ridges 35 are provided on the upper surface of the reinforcing plate 16, and a gap is formed between the ridges 35 and the reinforcing plate 16. A composite panel is used in which a plate material 13 extruded with a mixture of a thermosetting resin and cement or the like is placed on the upper surface of the reinforcing plate 16 and laminated with the reinforcing plate 16 as needed.

[0003]

However, such a conventional composite panel has a plate member 13 and a reinforcing plate 16.
When they are placed on the lower mold 15 and the upper mold 18 is lowered to perform compression molding, the ridges 35 of the reinforcing plate 16 are crushed and a part of the plate material 13 is filled in the gap with the ridges 35. The reinforcing plate 16 does not act as a reinforcing bar. Therefore, the connection between the reinforcing plate 16 and the plate member 13 is weak,
There is a problem that the bending strength of the composite panel 20 is low.

[0004]

In order to solve such a problem, the present invention provides a flat plate-shaped extruded product having a thin rectangular extrusion hole and extruding an extruded material from an extruder. When a through hole is provided and a reinforcing plate having an end portion of the through hole having an upright portion with a pointed corrugated shape is overlapped and compression-molded, a part of the flat plate extruded product is formed on the upright portion of the reinforcing plate. An attempt was made to obtain a laminated molded plate material that was locked so as not to fall off.

[0005]

Operation: The extruded plate material cut to a predetermined length is stacked on the metal reinforcing plate and placed on the lower mold, and the upper mold descends to perform compression molding. At this time, since a part of the plate material is fixed to the corrugated portion of the upright portion provided on the reinforcing plate, the reinforcing plate and the plate material are strongly coupled to each other, and the bending strength of the composite panel is increased.

[0006]

1 to 5 are views showing an embodiment of a plate material forming apparatus according to the present invention for explaining a plate material forming method according to the present invention. The present embodiment is formed in a strip shape. Fig. 1 shows an example in which an extruded member that is extruded is cut into a predetermined length and a reinforcing plate is superposed on the cut extruded plate material to perform compression molding and finish molding. Fig. 1 is a plan view of the plate material forming apparatus. 2 is a perspective view of a floor plate as a product formed by laminating and molding an extruded plate material and a metal reinforcing plate, FIG. 3 shows a rectangular metal reinforcing plate, FIG. 3 (1) is a partial plan view, and FIG. ) Is a cross-sectional view as seen from AA, FIG. 4 is a perspective view showing an upright portion of a through hole of a metal reinforcing plate, and FIG. 5 is a vertical section of a mold, an extruded plate material and a metal reinforcing plate showing a state during molding. The side view is shown.

In FIG. 1, an extrusion molding machine indicated by reference numeral 1 as a whole is equipped with an end platen 2 and a cylinder platen 3 which are erected on a machine base with their planes facing each other.
The four corners of both platens 2 and 3 are connected by a column 4. A main ram 5 is fixed to the center of the cylinder platen 3, and a crosshead 7 is fixed to the tip of a plunger 6 which moves forwards and backwards due to its hydraulic pressure. The crosshead 7 moves the plunger 6 forwards and backwards. Is configured to move back and forth along the column 4.

On the other hand, a cylindrical die 8 having a thin rectangular extrusion hole is fitted on the end platen 2,
A cylindrical container 9 is disposed between the die 8 and the crosshead 7, and an extrusion stem 10 that moves forward and backward integrally with the crosshead 7 is provided in an inner hole of the container 9. It is fitted. In this way, when the extrusion material 10 is fed to the inner hole of the container 9 and then the extrusion stem 10 moves forward, the extrusion material 11 is extruded as the strip-shaped plate material 12 from the extrusion hole of the die 8. .. The extruded material 11 in this example is mainly composed of a plastically deformable hydraulic inorganic aggregate such as cement, calcium silicate, gypsum, etc., and an aggregate such as river sand and an amino resin such as urea resin. , And a curing agent such as ammonium chloride in an appropriate ratio.

A cutting device (not shown) is provided in the plate material extruding path of the extrusion molding machine 1 having the above-described structure. The cutting device is extruded from the extrusion molding machine 1 and then fed by a belt (not shown) or on a pallet. The strip-shaped plate material 12 that has been placed and sent is configured to be cut into a plurality of plate materials 13. A feeding device 14 extending in a direction parallel to the strip-shaped plate material 12 is provided on the side of the strip-shaped plate material 12 to be extruded, and is driven by a drive device for each cycle to reciprocate in a direction indicated by an arrow A in the figure. The lower mold 15 and the metal reinforcing plate 16 shown in FIG. 5 which are moved and placed on the upper surface of the transfer plate,
It is configured to transfer a plurality of sets and supply them to the position shown in FIG.

In FIG. 5, the lower die 15 has a flat upper surface and a lower surface. After placing the plate member 13 on the metal reinforcing plate 16 and lowering the outer cylindrical molds 30 and 31 provided on the outer periphery of the upper mold 18 so as to be slidable in the vertical direction, respectively. The upper die 18 has a structure capable of being continuously down-molded.

Further, the reinforcing plate 16 is formed in a square shape from, for example, zinc-plated steel having a thickness of about 0.6 mm, and is made to have a strong fixation with the plate material 13 at the time of compression molding which will be described later. As shown in FIG. 4, a plurality of small holes 22 each having an upright portion 36 having a pointed corrugated shape and having a size of about 10 mm are formed in a zigzag pattern at a constant pitch. The end of the upright portion 36 has an irregular wavy shape, and the tip end has a sharp cutting edge. When the reinforcing plate 16 and the plate member 13 are overlapped and compression-molded, the irregular corrugated shape portion is entangled and fixed to the plate member 13, and serves to prevent the plate member 13 and the reinforcing plate 16 from falling off. There is.

Further, as shown in FIG. 6 to FIG. 8, when strong bending strength is exerted by cutting and raising, the boundary between the raised portion 35 and the metal reinforcing plate 16 is avoided due to stress concentration, and the composite panel 20 of the composite panel 20 is avoided. Although the bending strength had decreased,
In the present invention, since the base of the upright portion 36 is circular, the bending strength is made uniform in all directions.
Bending strength does not decrease.

Next, the plate material forming apparatus is provided with an extruded product transfer device (not shown) having a gripping member that moves up, down, and down. The plate material 13 gripped by the gripping member is shown in FIG. It is configured to be transferred from the extrusion position shown in (1) to the reinforcing plate 16 mounted on the lower mold 15 on the feeding device 14 stopped at the illustrated position.

Further, the feeding device 1 which holds and stops the lower mold 15 on which the plate member 13 and the reinforcing plate 16 are placed.
4 laterally outside, for example, three finishing presses 17
The molding press 17 is provided with an upper die indicated by reference numeral 18 in FIG. This upper mold 1
8 has a flat bottom surface. Further, the feeding device 1
For example, six pushers 19 as a pushing device are arranged above 4 to push the lower mold 15 on which the plate member 13 and the reinforcing plate 16 are placed below the upper mold 18. Has been done.

The operation of the plate material forming method configured as above will be described. The upper die 15 and the reinforcing plate 16 are placed on the feeding device 14 in an overlapping manner and moved to the position shown in FIG. 1 for preparation. Then, when the extrusion material 11 having the above-described composition is supplied into the container 9 and the plunger 6 of the main ram 5 is advanced, the extrusion stem 10 advances through the crosshead 7 and pushes the extrusion material 11, so that the extrusion material 11 is , The strip-shaped plate material 12 having a smooth surface is extruded from the extrusion hole of the die 8, and is cut into six plate materials 13 by a cutting device (not shown) on the table. At this time, an extruded product transfer device (not shown) operates and the gripping member moves up, moves, and descends. Therefore, the plate material 13 gripped by the gripping member is moved.
Is transferred from the extrusion position shown in FIG. 1 onto the reinforcing plate 16 placed on the lower mold 15 on the feeding device 14 stopped at the position shown.

In this state, the pusher 19 operates and the plate member 1
The lower mold 15 on which 3 and the reinforcing plate 16 are placed is pushed and moved below the upper mold 18. Therefore, first, the outer cylindrical molds 30 and 31 provided on the outer periphery of the upper mold 18 are lowered, and then the press 17 is operated to lower the upper mold 18 to perform compression molding. As shown in FIG. 5, the upper die 18 is a plate material 13.
After contact with the plate member 13, the plate member 13 and the reinforcing plate 16 are firmly fixed to each other by a so-called anchor effect in which a part of the plate member 13 is caught by the standing portion 36 by the pressing force. In this way, a substantially square floor material is obtained in which the plate material 13 and the reinforcing plate 16 are stacked and fixed. In the case of the reinforcing plate 16 having the same plate thickness of 0.6 mm, the laminated molded plate material 20 thus obtained has a three-point bending strength of 350 kgf as compared with the conventional laminated plate material shown in FIG. respect / cm ^2, the flexural strength becomes 450 kgf / cm ² in the present invention is about 30
It increased by nearly%.

At the four corners of the flooring material 20 thus formed, U-shaped grooves 20a for taking out wiring are pressed 17
It is obtained by finish molding. After the finish molding is performed in this way, the rectangular cylindrical outer mold frames 30 and 31 are raised, and then the upper mold 18 of the press 17 is raised and taken out of the machine. In the present embodiment, an example in which a cutting device for cutting the strip-shaped plate material 12 to obtain the plate material 13 is provided is shown, but this cutting device is not necessarily provided. In addition, although a square floor material has been described in this embodiment, a rectangular reinforcing material may be used as shown in FIG.

[0018]

As is apparent from the above description, according to the present invention, a flat-plate extruded product having a thin rectangular extrusion hole and extruding an extruded material from an extruder and a large number of through holes are provided. In addition, when the end of the through hole is overlapped with a reinforcing plate having a pointed corrugated upright portion and compression molded, a part of the flat plate extruded product cannot fall off to the upright portion of the reinforcing plate. The bending strength of the product is significantly increased and the lightweight and high-quality product can be obtained by obtaining the laminated molded plate material locked to. Furthermore, since the base of the upright part has a circular shape, the bending strength is made uniform in all directions, so cracks do not occur between the reinforcing plate and the upright part, and the bending strength of the laminated molded plate material is significantly improved. To do.

[Brief description of drawings]

FIG. 1 is a plan view of a plate material forming apparatus.

FIG. 2 is a perspective view of a product floor material formed by laminating and molding an extruded plate material and a metal reinforcing plate.

FIG. 3 is a detailed view of a rectangular metal reinforcing plate.

FIG. 4 is a perspective view of an upright portion of a metal reinforcing plate.

FIG. 5 is a vertical cross-sectional view of a die, an extruded plate material, and a metal reinforcing plate showing a state during molding.

FIG. 6 is a perspective view of a raised portion of a conventional reinforcing plate.

FIG. 7 is a perspective view of a raised portion of another conventional reinforcing plate.

FIG. 8 is a perspective view of a raised portion of still another conventional reinforcing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extrusion molding machine 5 Main ram 11 Extrusion material 12 Strip plate material 13 Plate material 14 Extrusion product transfer device 15 Lower mold 16 Reinforcing plate 17 Press 18 Upper mold 20 Product (laminated molding plate material) 22 Small holes 30, 31 Square tubular shape External formwork 35 Raised part 36 Raised part

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B32B 15/08 M 7148-4F E04F 15/06 7805-2E // B29L 7:00 4F

Claims (1)

What is claimed is: 1. A flat plate extruded product having a thin rectangular extrusion hole from which an extruded material is extruded from an extruder, and a large number of through holes are provided, and the ends of the through holes are provided. When the part is compression-molded by stacking it with a reinforcing plate having a pointed corrugated upright part,
A plate material forming method, comprising: obtaining a laminated molded plate material in which a part of the flat plate-like extruded product is locked in a standing portion of the reinforcing plate so as not to fall off.