JPH10193316A - Extrusion molded board for floor and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slip resistance value capable of securing safety of a pedestrian even in a rainfall by a method wherein an irregular pattern of a shallow cut is added to a surface of an extrusion molded board. SOLUTION: A designing belt body 8 is adjusted to a little longer than a length of an cylinder outer periphery of a roller 7, the belt body 8 is wound on the cylindrical roller 7, both ends are put together to be connected with a rod, and an endless state is formed. The roller 7 coated with the belt body 8 is freely rotatably attached onto a die 2, and a position of the roller 7 is adjusted at a height wherein an under surface of the belt body 8 pushes an upper surface of the extrusion molded board 4. When extruding raw material is charged into an extrusion molder under this state and the molder is operated, the belt body 8 bites in the upper surface of the extrusion molded board 4 under being extruded, and a texture pattern is transferred thereto. The belt body 8 is rotated by being driven at the same peripheral speed as a speed of the molded board 4, and continuous patterning is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded board used for floors and steps of a prefabricated apartment house and a method of manufacturing the same, and more particularly, to a large slip resistance obtained by transferring a shallowly engraved texture pattern. The present invention relates to an extruded plate and a method for producing the same.

[0002]

2. Description of the Related Art Extruded cement boards are multi-purpose building materials. In prefabricated apartment buildings, besides interior and exterior walls, floors in corridors, steps on stairs, landing areas, and other places where people walk. It is also used as a building material. Generally, a cement-based extruded plate is made by adding water to compounding materials such as cement, finely divided silica sand, reinforcing fiber, and viscous agent, kneading the mixture hard, putting it into an extruder, applying high pressure, and applying a predetermined pressure to the die. It is a building material manufactured by extrusion molding.
The surface of the extruded product is denser and smoother than ordinary concrete, and is particularly slippery during rainfall.

Conventionally, extruded plates used in these places have been sprayed thinly with lysine or mortar mixed with hard coarse sand on the surface of the plate to prevent pedestrians from slipping. If it does so, the resistance will decrease, and pock-like stains will become noticeable on the traces that have peeled off. As another slip prevention method, there is a method of making a cut in the die of the extruder and providing a number of vertical stripe-shaped grooves on the surface of the extruded plate.However, the appearance is impaired, dust is clogged in the grooves, and cleaning is performed. There are problems that it is difficult to remove, and that during rainfall, slipperiness remains in the direction of vertical stripes.

Japanese Patent Publication No. 58-38085 discloses an endless strip having an irregular pattern on an outer surface, a part of which is exposed in a forming die, and is axially slidable in the extrusion direction. A method of patterning a surface of an extruded plate by rotating a body in a rotating band in synchronization with an extrusion speed is described. JP-A-60-253523 discloses that a roller having a concavo-convex pattern on a cylindrical surface is rotatably mounted on the upper surface of a die, and this roller is pressed against the surface of a forming plate being extruded to thereby extrude the forming plate. And a method of transferring the concavo-convex pattern on the cylindrical surface of the roller by rotating the roller synchronously.

[0005]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 58-3808
In the method disclosed in Japanese Patent Application Publication No. 5 (1999) -1995, the material of the endless belt having a pattern is usually made of natural rubber or synthetic rubber, but the extrusion speed of the hard kneaded raw material fluctuates slightly. There is a problem that the pattern may be deformed due to the repetition of slight expansion and contraction, or a cutting trouble of the belt-shaped body may be caused.

In the method disclosed in Japanese Patent Application Laid-Open No. Sho 60-253523, the patterned roller is a device in which a flat plate in which a reversed pattern of irregularities is formed on a natural rubber or synthetic rubber plate is attached to the surface of a steel roller. Therefore, there is a problem that one roller is required for one pattern. Further, since the entire load of the pressure is applied to the roller bearing, the rotation of the roller may be deteriorated during the manufacture of the patterned extrusion molded plate, and a large number of defective products such as pattern deformation and scratches may be generated. There was a problem.

SUMMARY OF THE INVENTION The present invention proposes a method of applying a shallowly engraved texture pattern to the surface of an extruded plate in order to prevent the extruded plate from sliding. Heretofore, many proposals have been made regarding the patterning of an extruded plate used as an outer wall material. However, since the purpose is to design a building, a relatively large pattern and deep engraving (1
(0 to 25 mm). On the contrary,
An object of the present invention is to provide an extruded plate provided with a textured pattern suitable for preventing slippage of a floor material over the entire surface of the extruded plate, and a method for producing the same.

[0008]

The extruded plate of the present invention comprises:
In order to increase the sliding resistance of the extruded plate, the surface of the plate is provided with a lightly carved texture pattern.

In the present invention, if the extruded plate is provided with a deeply carved pattern, the walking property is deteriorated.
mm or less (preferably 0.2-1 mm, especially 0.3-
It is necessary to apply a shallow engraving (0.8 mm) evenly over the entire surface of the plate.

In the method for manufacturing an extruded plate according to the present invention, the weave pattern is formed by pressing a rotating body for patterning onto an upper surface of an extruded plate extruded from a die of an extruder. Item 1. The method for producing an extruded plate according to Item 1, wherein the rotating body for patterning is obtained by coating an outer periphery of a roller having a smooth outer peripheral surface made of steel with an endless patterned band-shaped body. A textured strip is mounted to freely slide around the outer periphery of the roller, the roller is rotatably mounted on the upper surface of the die, and the textured strip on the outer circumference of the roller is placed on the surface of an extruded plate. And the pattern is transferred to the surface of the extruded plate by rotating in synchronization with the extrusion speed of the formed plate.

In the method of the present invention, the outer circumference of the roller having a smooth cylindrical surface made of steel is covered with the endless patterned band, and the patterned band slides freely around the roller. It is attached to get. The roller is rotatably mounted on a die, and the patterned strip covered with the roller is pressed against the surface of the extruded plate, and is rotated in synchronization with the extrusion speed of the formed plate, thereby forming a shallow texture pattern on the extruded plate. Transfer to the surface.

As the patterned strip, it is preferable to use a belt of a belt conveyor knitted with a steel wire used in a heating dryer for food or the like. In this belt, a steel wire wound in a spiral shape is connected by a lot wire, and when this is extended, a bendable belt-like body is formed. By connecting the leading and trailing spiral lines of this band with a lot line, an endless band is formed. This is covered with a roller to perform patterning. In addition, since the strip is slightly expanded and contracted when pressed against the upper surface of the extruded plate by the roller, the raw material adhering to the strip drops off and is always kept in a clean state. It is not necessary to perform such cleaning.

The belt is not fixed to the roller but is slidable with respect to the roller. For this reason, even if the roller bearing stops and the roller stops, the belt-shaped body slides on the roller and continues to rotate, so that the production of the patterned extruded plate can be continued. Therefore, there is no need to immediately stop the production line and replace the patterning roller, and it is possible to reduce the occurrence of defective products due to pattern disturbance.

[0014]

FIG. 1 is a sectional view showing a method of manufacturing an extruded plate according to an embodiment. A die 2 is attached to a tip of an extruder 1 and a core 3 is placed in the die 2. Are located. The extruded plate 4 extruded from the die 2 is guided by a roller conveyor 5 and fed to the right in the figure.

An opening 6 is provided on the upper surface of the die 2, and a roller 7 is set so as to face the opening 6 with its axial line perpendicular to the extruding plate feeding direction and horizontal. A belt 8 for patterning is mounted on the outer periphery of the roller 7. The belt-like body 8 has a cylindrical shape and is slidably fitted on the outer periphery of the roller 7.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1. The roller 7 is rotatably supported on the die 2 by a bearing 9. Core 3 is divided into several parts,
The hollow extruded plate 4 is extruded.

When the raw material 10 kneaded in the extruder 1 is extruded through the die 2, the strip 8 is pressed against the upper surface thereof, thereby forming a shallow engraved pattern on the upper surface of the extruded plate 4. Is done.

FIG. 3 shows an example of the belt-like body 8, which is a spiral wire 11 in which a steel wire is spirally wound.
And the lot line 12 connecting the spiral wire 11 forms the band-shaped body 8. By connecting the leading and trailing spiral lines 11 of the band-like body 8 with a lot line, an endless ring is formed.

Since the belt 8 is slidably fitted to the roller 7, even if the roller 7 is locked, the belt 8 continues to rotate following the feeding of the extruded plate 4. The production of the extruded plate 4 can be continued without any trouble. Further, since the strip 8 is slightly expanded and contracted when pressed onto the upper surface of the extruded plate 4 by the roller 7, the raw material attached to the strip 8 drops off and is always kept in a clean state. It is not necessary to clean like a patterned roller.

[0020]

[Example] Outer diameter of cylinder: 182.5 mm, length: 600 mm
The spiral belt (NTN) manufactured by Nippon Filcon Co., Ltd. shown in FIG.
-4 type) was used. The patterned strip is trimmed slightly longer than the outer circumference of the roller cylinder, the strip is wound around the roller 7 in a cylindrical shape, and both ends are joined by a rod.
Endless. Roller 7 covering this band 8
Is rotatably mounted on the die 2, and the position of the roller 7 is adjusted to a height at which the lower surface of the strip 8 presses the upper surface of the extruded plate 4. The core 3 of the die 2 is extended to a position facing the roller 7 as shown in FIG.

In this state, when the raw material for extrusion is put into an extruder and operated, the strip 8 is cut into the upper surface of the extruded plate 4 being extruded, and the texture is transferred. The belt-shaped body 8 is driven and rotated at the same peripheral speed as the speed of the forming plate 4 to perform continuous patterning. While the rotation of the roller bearing 9 is light, the roller 7 itself rotates together with the belt 8. However, even if the roller 7 stops due to some trouble, the roller 7 and the belt 8 slide, and the belt 7 slides. Only the body 8 rotates.

The pattern to be transferred differs depending on the type of the belt used, and the same pattern can be applied to the entire surface of the molded plate. When the spiral belt shown in FIG. 3 is used as a band with a pattern, the pattern becomes a cedar twill pattern, and the depth of the pattern is about 0.4 mm. Table 1 shows the results of the measurement of the slip resistance of the extruded plate provided with the pattern of the cedar twill pattern, and slip resistance performance satisfying the pedestrian safety standards was obtained. This test targets a wet slip resistance (BPN value) of 40 or more in accordance with the “Asphalt Pavement Guidelines” (published by the Japan Road Association) and “Guidelines for Pedestrian Road Color Pavement Design” (published by the Tokyo Metropolitan Construction Bureau). And

[0023]

[Table 1]

[0024]

As is evident from the above Examples and Comparative Examples, the extruded plate is provided with a shallow concave and convex pattern so as to provide a slip resistance value that can ensure the safety of pedestrians even during rain. Becomes possible. Note that the cost can be significantly reduced as compared with the lysine spraying.

In the manufacturing method of the present invention, since the gap between the patterned strip and the roller is not fixed, deformation of the pattern due to failure of the roller bearing and defective defectives are reduced. Further, when changing the pattern, it is possible to easily change the attachment / detachment of the band-shaped body. It is only necessary to change only the belt-like body, and the roller can be used as it is even if the pattern is changed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a method for manufacturing an extruded plate according to an embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of a spiral belt used as a band.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 extruder 2 die 3 core 4 extruded plate 5 roller conveyor 7 roller 8 strip 11 spiral wire 12 lot wire

Claims (3)

[Claims] 1. An extruded plate having a large slip resistance, characterized in that the extruded plate has a shallow texture pattern on the surface thereof. 2. The method of manufacturing an extruded plate according to claim 1, wherein said texture pattern is formed by pressing a rotating body for patterning onto an upper surface of said extruded plate extruded from a die of an extruder. The rotating body for patterning is obtained by coating an outer periphery of a roller having a smooth outer peripheral surface made of steel with an endless patterned belt, and the patterned belt is formed on the outer periphery of the roller. The roller is rotatably mounted on the upper surface of the dice, and the patterned strip around the roller is pressed against the surface of the extruded plate, and the extrusion speed of the formed plate is adjusted. A method for manufacturing an extruded plate, wherein the pattern is transferred to the surface of the extruded plate by rotating in synchronism with the above. 3. The belt according to claim 2, wherein the patterning band used is an endless band consisting of a spiral wire formed by spirally winding a steel wire and a lot wire connecting the spiral wire. A method for producing an extruded plate.