JP2006007458A - Method and apparatus for manufacturing extrusion molded cement panel with embossed pattern - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an extrusion molded cement panel with an embossed pattern, which enables the formation of a sharp pattern, wherein ribs and embosses are compounded, difficult heretofore, and an apparatus therefor. <P>SOLUTION: When a slurry comprising a hydraulic material is extruded from a cap 21 to obtain an uncured green panel 23, the green panel 23 having ribs 33 preformed to its upper surface 23a is extruded from the cap 21 and an embossing means (endless embossing belt 37) having ridges 37b inserted in the gaps between the ribs 33 is subsequently brought into close contact with the green panel 23 at the downstream position in the extrusion direction from the cap 21 to impart a composite pattern of the ribs 33 and the embosses to the upper surface 23a of the green panel 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to an apparatus for manufacturing an extruded cement board with an embossed pattern that uses a hydraulic material such as cement to extrude building materials such as outer walls and partition walls, and in particular, an extrusion with an embossed pattern that combines a rib and an embossed pattern. The present invention relates to an improved technique for obtaining a molded cement board.

  An extrusion-molded cement board obtained by kneading a hydraulic material such as cement with a reinforcing fiber or an admixture and extruding is used as an outer wall or partition wall of a building. Recently, due to diversification of finishing such as outer wall materials, finishing of extruded cement boards with various patterns and shapes has been required.

  Extruded cement boards can be manufactured with various cross-sectional shapes by changing the opening shape of the die. It is used. In addition, an extruded cement board with an embossed pattern in which uneven embossed patterns are applied to the surface to enhance added value is also used.

  Such an extrusion-molded cement board having a rib shape on the surface or an extrusion-molded board with an embossed pattern, as shown in FIG. 6, the hydraulic material 1 such as cement from the extrusion machine 3 to the opening shape of the die 5. In the extruded cement board 7 with an embossed pattern, an embossed pattern (a raised pattern) is applied to the surface of the green board 11 by an embossed belt 9 or an embossed roller (not shown) and cut into a predetermined length. After that, it is placed on a curing iron plate (backing plate) and manufactured through a primary curing, an autoclave curing, and a finishing process.

  The extrusion-molded cement board 7 with embossed pattern is manufactured by vacuuming the inside of the extruder 3 and extruding the slurry with a screw (not shown), and finally embossing at the top die portion (inside the die 3) to be formed into a die shape. The belt 9 is brought into close contact with the flat upper surface of the green plate 11 and an embossed pattern is applied. By doing in this way, a raw material tends to enter the recessed part of the emboss belt 9 by extrusion pressure, and patterning can be performed easily. Further, since the base 5 has the center ball 15, a pattern can be imparted without causing deformation of the hollow portion 17.

  Patent Document 1 below discloses a manufacturing apparatus in which a die for providing a groove pattern is provided at the tip of the die and a groove pattern (rib shape) is provided on the surface. Patent Document 2 discloses a method in which a pattern is imparted inside the die by an embossed belt that faces the core body (center ball) of the extrusion die. Patent Document 3 discloses a method in which an emboss belt is extruded from a die of an extruder in accordance with an extrusion speed, and a pattern is applied by pressure applied from an extruder.

Japanese Patent Laid-Open No. 08-169004 JP 55-93410 A Japanese Patent Application No. 56-144138

In recent years, with the diversification of exterior wall finishing, not only embossed patterns and rib shapes, but also a panel that combines them has been required.
However, when manufacturing an extruded cement board to match the die shape, it is possible to form a continuous shape (ribs, stripes, etc.) parallel to the extrusion direction, but it is also difficult to give an embossed pattern on the upper surface of the ribs Met.
The manufacturing apparatus of Patent Document 1 gives a groove pattern (rib shape) that matches the shape of the die, but only the ribs and stripe pattern, and can only produce a simple shape that matches the shape of the die. Moreover, although the method of patent document 2 and patent document 3 provides a pattern inside a nozzle | cap | die with an emboss belt, when pressing on a raw board, the raw material of a raw board recessed part (pattern recessed part) is a raw board convex part (pattern convex part). ), The embossing mold is formed so that the raw material balance of the whole green plate becomes constant, and it is difficult to produce an extruded cement board in which the rib and the embossed pattern are combined.
That is, in the production of an extruded cement board with an embossed pattern, when patterning is performed with an embossed belt, when the embossed belt is pressed against the green board, the raw material of the pattern concave part on the green board moves to the pattern convex part. The embossing mold was formed so that the balance of the raw material of the whole board became constant, and the embossing pattern was provided by this. For this reason, when the embossed belt is used, the raw material does not move smoothly unless the cross-sectional area of the embossed pattern is substantially constant at any position in the extrusion parallel direction and the perpendicular direction.
In the conventional method of combining the ribs and the embossed pattern, for example, as shown in FIG. 7, the emboss belt 9 having the ridges 9a at the top die portion (inside the base 3) at the final stage is flattened on the green plate 11. The ribs 19 and the embossed pattern 13 were simultaneously provided in close contact with the upper surface 11a. For this reason, the raw material flow amount when the raw material is filled into the ribs 19 and the pattern convex portion becomes large, the raw material filling pressure becomes uneven, and the raw material moves from the raw plate concave portion to the raw plate convex portion. There was a problem that the flow balance of necessary raw materials was difficult to be constant. As a result, gaps (chips / roundness) S (see FIG. 7) due to poor filling occurred in the ribs and pattern convex portions.
In particular, when the height of the rib 19 was 5 mm or more, the flow balance of the raw material became unstable, and a gap S that was not filled with the raw material was generated at the corner portion of the rib, and the pattern of the embossed belt was not accurately transferred. In order to prevent such problems, it is conceivable to round the corners of the ribs when the height of the ribs is less than 5 mm or more than 5 mm. If roundness was given, the shadows became indistinct, the sharpness of ribs and embossing was lost, and there was a problem that the commercial value was lowered. For this reason, conventionally, it has been difficult to produce an extruded cement board with an embossed pattern in which high rib irregularities are formed on the embossed belt and the rib and the embossed pattern are combined.
The present invention has been made in view of the above situation, and obtains a method and an apparatus for producing an extruded cement board with an embossed pattern that enables formation of a sharp pattern combining ribs and embossing, which has been difficult in the past. It is in.

  The method for producing an extruded cement board with an embossed pattern according to claim 1 according to the present invention for achieving the above-mentioned object is obtained by extruding a slurry made of a hydraulic material from a die to obtain an uncured green board, After extruding a raw plate having ribs formed on the upper surface in advance from the base, the embossing means having convex ridges inserted between the ribs is brought into close contact with the upper surface at a position downstream from the base in the extrusion direction. The composite pattern of the said rib and embossing is provided.

  In this method of manufacturing an extrusion-molded cement board with an embossed pattern, when the embossing means is pressed against the green board, the ridges of the embossing means enter the concave parts of the green board provided by forming ribs in advance. . Therefore, as in the conventional method, the embossing means provided with ridges and patterns is pressed onto the flat green plate upper surface at once, and the ribs and embossed patterns are transferred to the raw material. Since the amount of raw material flow when filling the portion is small, and the protrusions are inserted between the ribs, it becomes difficult to form voids, and the filling pressure of the raw material at any part becomes uniform. Thereby, the balance of the raw material required for the raw material of a green board recessed part to move to a green board convex part becomes fixed. That is, gaps (chips / roundness) due to poor filling do not occur in the ribs and pattern protrusions.

  The manufacturing method of the extrusion-molded cement board with an embossed pattern of Claim 2 provides the said embossing on the upper surface of the said rib.

  In this method of manufacturing an extrusion-molded cement board with an embossed pattern, when the embossing means is brought into close contact with the green board on which the ribs are formed, the protrusions of the embossing means enter between the ribs, and at the same time, the protrusions of the embossing means. The concavo-convex pattern formed between the strips is brought into close contact with the upper surface of the ribs of the green plate, and the emboss is transferred.

  The manufacturing method of the extrusion-molded cement board with an embossed pattern of Claim 3 provides the said embossing between the said ribs, It is characterized by the above-mentioned.

  In this method of manufacturing an extrusion-molded cement board with an embossed pattern, when the embossing means is brought into close contact with the green board on which the ribs are formed, the protrusions of the embossing means enter between the ribs, and at the same time, the protrusions of the embossing means. The concavo-convex pattern formed on the upper surface of the strip is brought into close contact between the ribs of the green plate, and the emboss is transferred.

  The method for producing an extruded cement board with an embossed pattern according to claim 4 is characterized in that the emboss is provided between the upper surface of the rib and the rib.

  In this method of manufacturing an extrusion-molded cement board with an embossed pattern, when the embossing means is brought into close contact with the green board on which the ribs are formed, the protrusions of the embossing means enter between the ribs, and at the same time, the protrusions of the embossing means. The concavo-convex pattern formed between the upper surface of the strip and the ridge is brought into close contact with the ribs of the green plate and the upper surface of the rib to transfer the emboss.

  An apparatus for producing an extrusion-molded cement board with an embossed pattern according to claim 5, wherein a base for extruding a hydraulic material as an uncured raw board, and rib formation provided inside the base for forming a rib on the upper surface of the raw board The metal fitting, a belt conveyor that receives and transfers the green plate extruded from the base, and a protrusion that is provided at a downstream position in the extrusion direction of the base and is inserted between the ribs, and is transferred by the belt conveyor. And an embossing means for transferring the concavo-convex pattern onto the upper surface in close contact with the green plate.

  In this embossed-patterned extruded cement board manufacturing apparatus, ribs are formed in advance on the upper surface of the green board by rib-forming metal fittings, and embossing is performed while embossing is inserted between the ribs at the time of emboss transfer. The embossed pattern of the applying means is transferred. Therefore, even when the cross-sectional area of the embossed pattern is not constant due to the formation of ribs on the green plate, the flow balance of the raw material is stabilized and the raw material moves smoothly. As a result, the corner portion can be reliably filled with the raw material and the emboss can be accurately transferred.

  The apparatus for producing an extruded cement board with an embossed pattern according to claim 6, wherein the embossing means is an embossed belt that moves in synchronization with the belt conveyor, and the embossed belt is divided for each rib. It is characterized by being.

  With this embossed extruded cement board manufacturing equipment, the embossed belt is divided between the ribs, and various types of embossed belts can be combined. For example, the rib can be used to change the embossed pattern or to form a rib without any pattern. Therefore, it becomes possible to easily manufacture extruded cement boards with embossed patterns having various surface patterns.

  According to the method for producing an embossed patterned cement board with an embossed pattern according to the present invention, after extruding a raw plate with ribs formed on the upper surface in advance from the die, the embossing means having ridges is brought into close contact with the upper surface, Since a composite pattern of ribs and embossing is applied, when the embossing means is pressed against the green board, the ridges of the embossing means will enter the recesses of the green board provided by forming ribs in advance. The balance of the raw materials necessary for the raw material of the raw plate concave portion to move to the raw plate convex portion is constant. For this reason, a rib and an embossed pattern can be provided in combination. Moreover, since the raw material is reliably filled in the corner portion of the rib, the shading of the pattern is clear and a sharp composite pattern of the rib and the emboss can be imparted to the green plate.

  According to the apparatus for manufacturing an extruded cement board with an embossed pattern according to the present invention, a base for extruding a hydraulic material as a raw board, a rib-forming metal fitting provided inside the base to form a rib on the upper surface of the raw board, Since it is equipped with embossing means that has protrusions inserted between them and closely adheres to the green plate to transfer the uneven pattern to the upper surface, ribs can be formed in advance on the upper surface of the green plate with rib forming metal fittings, and the emboss transfer In this case, the embossed pattern of the embossing means can be transferred while inserting the ridges between the ribs. Therefore, even when the cross-sectional area of the embossed pattern is not constant due to the formation of ribs on the green plate, the flow balance of the raw material is stabilized and the raw material moves smoothly. As a result, the corner portion can be reliably filled with the raw material, the pattern of the embossed belt can be accurately transferred, and a sharp rib with a clear shadow and the embossed pattern can be combined to form.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a method for manufacturing an extruded cement board with an embossed pattern and an apparatus therefor according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part of an apparatus for producing an extruded cement board with an embossed pattern according to the present invention, FIG. 2 is a perspective view of a rib forming metal fitting shown in FIG. 1, and FIG. FIG. 4 is an operation explanatory view showing the application status of ribs and embossed patterns, and FIG. 5 is an explanatory view showing composite examples of ribs and embossed patterns in (a) to (c).
An embossed extruded cement board manufacturing apparatus (hereinafter simply referred to as “manufacturing apparatus”) 100 has an extruder (not shown) in which a pressure feeding path is formed, and rotates a screw built in the pressure feeding path. A hydraulic material such as cement supplied from a hopper or the like, a reinforcing fiber, an admixture, and the like are kneaded and pumped to the discharge pipe portion. A base 21 is provided at the tip of the discharge pipe portion, and the base 21 has, for example, a rectangular extrusion opening that is long in the direction perpendicular to the plane of FIG. As a result, the uncured hydraulic material extruded from the base 21 is extruded into a green plate 23 having a rectangular cross section.

  The base 21 may be provided with a center ball 25 inside. By providing the center ball 25, a hollow portion 27 having the same cross-sectional shape as the center ball 25 can be formed in the extrusion direction on the green plate 23 extruded from the base 21. Since the size and position of the hollow portion 27 change depending on the thickness of the green plate 23, the middle ball 25 can adjust the vertical position of the middle ball 25. Further, the middle ball 25 can be removed from a middle ball stay (a mounting portion that supports the middle ball 25) (not shown) and replaced with a different size.

  A rib forming metal fitting 31 is provided inside the base 21, and the rib forming metal fitting 31 alternately arranges the concave portions 31 a and the convex portions 31 b shown in FIG. 2 in the width direction of the green plate 23 (in the direction orthogonal to the plane of FIG. 1). Has been established. The rib forming metal part 31 forms the rib 33 on the upper surface 23a of the green plate 23 by the recess 31a. Further, an inclined surface 31c is formed on the downstream side of the rib forming metal fitting 31 in the extrusion direction, and an emboss belt described later is slidably contacted with the inclined surface 31c.

  A belt conveyor (not shown) that receives and transfers the green plate 23 extruded from the base 21 is disposed downstream of the base 21 in the extrusion direction. The belt conveyor is endless between a driving roller connected to a driving motor and a driven roller. A belt is stretched over. The driving speed of the drive motor of the belt conveyor is controlled by a control device. As the control device, a computer equipped with a CPU can be suitably used.

  A tuning presser roller 35 is provided above the rib forming metal 31 so as to be driven to rotate clockwise in FIG. 1 by a drive motor (not shown), and an endless embossing having an uneven pattern on the outer surface of the tuning presser roller 35. A belt 37 is stretched over. The endless emboss belt 37 is stretched around a guide roller (not shown) on the downstream side so that it can be in close contact with the upper surface of at least the maximum length of the green plate 23. The synchronized pressing roller 35 presses the endless emboss belt 37 against the green plate 23 in synchronization with the belt conveyor. The endless embossed belt 37 is in close contact with the upper surface of the rib-formed raw plate 23 extruded from the base 21 so that the uneven pattern can be transferred to the raw plate. The endless emboss belt 37 is disposed at a downstream position in the extrusion direction of the base 21. The drive speed of the drive motor of the synchronous presser roller 35 is controlled by the control device. That is, the above-mentioned belt conveyor and the endless emboss belt 37 are controlled at the same speed in synchronism with the control device.

  As shown in FIG. 3, the endless emboss belt 37 has concave grooves 37 a and ridges 37 b alternately in the width direction of the green plate 23 on the close contact surface with the green plate 23. The ridges 37b are inserted between the ribs 33 formed on the green plate 23 shown in FIG. A protrusion 37 c (see FIG. 3) protrudes from the back surface of the endless emboss belt 37, and the protrusion 37 c is fitted into a circumferential groove 35 a formed on the outer periphery of the synchronization pressing roller 35. Thereby, the endless embossing belt 37 is restricted from moving in the axial direction of the synchronous pressing roller 35. In the present embodiment, the concave / convex pattern 43 is provided in the concave groove 37 a of the endless emboss belt 37. In addition, the concavo-convex pattern 43 may be provided at the tip of the ridge 37b or at both the groove 37a and the ridge 37b.

  Further, the endless emboss belt 37 may be formed integrally in the width direction, or may be divided for each rib 33 formed on the green plate 23 as illustrated in FIG. Good. According to the endless embossed belt 37 having such a divided structure, various types of embossed belts can be combined. For example, the rib 33 can change the embossed pattern or form the rib 33 without a pattern. This makes it possible to easily produce extruded cement boards with embossed patterns having various surface patterns.

  The synchronized pressing roller 35 and the endless embossing belt 37 constitute an embossing means 41.

Next, the manufacturing method of the extrusion-molded cement board with an embossed pattern using said manufacturing apparatus 100 is demonstrated.
In this manufacturing method, when the hydraulic material is extruded from the base 21 to extrude the green plate 23 and is received and transferred onto the belt conveyor, the endless emboss belt 37 is placed on the green plate 23 at a downstream position in the extrusion direction of the base 21. The concavo-convex pattern 43 is transferred to the green plate 23 in close contact with the upper surface 23a. As a result, after the extrusion pressure inside the die is released, that is, after the deformation caused by the difference in pressure during extrusion, screw pulsation, and slight pressing force on the left and right ends, the uneven pattern 43 is transferred to the raw plate 23. Will be.

  At this time, the raw plate 23 in which the ribs 33 are formed in advance on the upper surface 23 a is pushed out from the base 21. The endless emboss belt 37 is brought into close contact with the upper surface 23a of the green plate 23 in a state where the ridges 37b are inserted between the ribs of the green plate 23. That is, after extruding the raw plate 23 on which the ribs 33 are formed on the upper surface 23a from the base 21 in advance, the endless emboss belt is brought into close contact, and a composite pattern of the ribs 33 and the concavo-convex pattern 43 is imparted to the upper surface 23a.

  In this way, when the endless embossed belt 37 is pressed against the green plate, the protrusions of the endless embossed belt 37 are formed in the recesses (between the ribs 33) 23b of the green plate 23 provided by forming the ribs 33 in advance. 37b enters. Therefore, as in the conventional method, the embossing means provided with ridges and patterns is pressed onto the flat raw plate upper surface at a time and the ribs and embosses are transferred, so that the raw material is the ribs 33 and patterns. Since the raw material flow amount when filling the convex portion is small, and the protrusions 37b are inserted between the ribs 33, it becomes difficult to form voids, and the raw material filling pressure at an arbitrary portion becomes uniform. Thereby, the balance of the raw material required for the raw material of raw board recessed part (between ribs 33 etc.) 23b to move to a raw board convex part (rib 33 etc.) becomes constant. That is, no gaps (chips / roundness) due to poor filling occur in the ribs 33 and the pattern protrusions.

  When the concave and convex pattern 43 is provided in the concave groove 37 a of the endless emboss belt 37, the convex and concave line 37 b enters between the ribs 33 and at the same time, the concave and convex pattern 43 closely contacts the upper surface of the rib 33 of the raw plate 23. Then, the composite pattern of the rib 33 and the embossed pattern 51 shown in FIG. Further, when the ridges 37 b of the endless emboss belt 37 are provided with the concavo-convex pattern 43, the ridges 37 b enter between the ribs 33 and at the same time, the concavo-convex pattern 43 closely contacts the ribs 33 of the raw plate 23. Then, the composite pattern of the rib 33 and the embossed pattern 51 shown in FIG. 5B is transferred. Further, when the concave and convex patterns 43 are provided in the concave grooves 37 a and the convex ridges 37 b of the endless emboss belt 37, the convex and concave ridges 37 b enter between the ribs 33 and at the same time, the concave and convex patterns 43 become the ribs of the raw plate 23. In close contact between the upper surface 33 and the rib 33, the composite pattern of the rib 33 and the embossed pattern 51 shown in FIG.

  In this manufacturing apparatus 100, ribs 33 are formed in advance on the upper surface 23 a of the raw plate 23 by the rib forming metal fitting 31, and when the emboss is transferred, the protrusions 37 b are inserted between the ribs 33, and the endless shape is inserted. The uneven pattern 43 of the emboss belt 37 is transferred. Therefore, even when the cross-sectional area of the embossed pattern is not constant due to the formation of the ribs 33 on the green plate 23, the flow balance of the raw material is stabilized and the raw material moves smoothly. As a result, the corner portion can be reliably filled with the raw material and the emboss can be accurately transferred.

  Therefore, according to the above manufacturing method, after extruding the raw plate 23 having the ribs 33 formed on the upper surface 23a in advance from the base 21, the endless emboss belt 37 having the ridges 37b is brought into close contact with the upper surface 23a. Since the composite pattern of the rib 33 and the emboss is provided, when the endless emboss belt 37 is pressed against the raw plate 23, the ridge 37b enters the concave portion of the raw plate 23 provided by forming the rib 33 in advance. As a result, the balance of the raw materials necessary for the raw material in the raw plate concave portion to move to the raw plate convex portion becomes constant. For this reason, the rib 33 and the embossed pattern 51 can be applied in combination. Further, since the raw material is surely filled in the corner portion of the rib 33, the shading of the pattern is clear, and a sharp composite pattern of the rib 33 and emboss can be imparted to the green plate.

  And according to said manufacturing apparatus 100, the base 21 which extrudes hydraulic material as the raw board 23, the rib formation metal fitting 31 which forms the rib 33 in the raw board upper surface 23a provided in the base 21, and the rib 33 of Since it has an endless embossing belt 37 that has protrusions 37b inserted between them and is in close contact with the raw plate 23 and transfers the concavo-convex pattern 43 to the upper surface 23a, The ribs 33 can be formed in advance, and when the emboss is transferred, the uneven pattern 43 of the endless emboss belt 37 can be transferred while inserting the ridges 37b between the ribs 33. Therefore, even when the cross-sectional area of the embossed pattern is not constant due to the formation of the ribs 33 on the green plate 23, the flow balance of the raw material is stabilized and the raw material moves smoothly. As a result, the corner portion can be reliably filled with the raw material, the pattern of the endless emboss belt 37 can be accurately transferred, and the sharp ribs 33 with sharp shadows and the embossed pattern 51 are combined to form. be able to.

  The height of the rib 33 to be provided is limited to the size of the die 21 to be extruded, but from the viewpoint of shape retention of the raw plate 23 and productivity, 1/3 to 1 / th of the thickness of the extruded cement plate. About 2 is desirable.

It is principal part sectional drawing of the manufacturing apparatus of the extrusion molding cement board with an embossing pattern which concerns on this invention. It is a perspective view of the rib formation metal fitting shown in FIG. It is explanatory drawing showing the modification of an emboss provision means. It is operation | movement explanatory drawing showing the provision condition of a rib and an embossed pattern. It is explanatory drawing which represented the composite example of the rib and the embossed pattern with (a)-(c). It is principal part sectional drawing of the conventional manufacturing apparatus. It is operation | movement explanatory drawing showing the provision condition of the rib and embossing pattern in a conventional method.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Base, 23 ... Raw board, 23a ... Upper surface, 31 ... Rib formation metal fitting, 33 ... Rib, 35 ... Synchronous press roller (embossing provision means), 37 ... Endless embossing belt (embossing provision means), 37b ... Projection , 100 ... Manufacturing device (Embossed embossed cement board manufacturing device)

Claims (6)

When a slurry made of a hydraulic material is extruded from a die and obtained as an uncured green plate,
After extruding a raw plate with ribs formed on the upper surface in advance from the base,
Embossing characterized in that an embossing means having protrusions inserted between the ribs is brought into close contact with the base at a downstream position in the extrusion direction from the base, and a composite pattern of the ribs and embossing is provided on the upper surface. Method for producing patterned extruded cement board.   2. The method for producing an extruded cement board with an embossed pattern according to claim 1, wherein the emboss is applied to an upper surface of the rib.   The method for producing an extruded cement board with an embossed pattern according to claim 1, wherein the emboss is provided between the ribs.   The method for producing an extruded cement board with an embossed pattern according to claim 1, wherein the emboss is provided between an upper surface of the rib and the rib. A base for extruding hydraulic material as an uncured green plate,
A rib-forming metal fitting provided inside the base and forming a rib on the upper surface of the green plate;
A belt conveyor that receives and transfers the green board extruded from the base;
An embossing means for transferring a concavo-convex pattern to the upper surface in close contact with the green plate transported by the belt conveyor, provided on a downstream position in the extrusion direction of the die and having a ridge inserted between the ribs. An apparatus for producing an extruded cement board with an embossed pattern. An apparatus for producing an extruded cement board with an embossed pattern, wherein the embossing means is an embossed belt that moves in synchronization with the belt conveyor, and the embossed belt is divided for each rib.

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