JPS6147683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an embossing molding device for cement plates, etc., for extrusion molding materials such as cement admixtures, and forming deep embossed patterns on the surface thereof.

Conventionally, in order to apply an embossed pattern to a cement board or the like by extruding this type of inorganic composition, it is common to apply the embossed pattern after extrusion from a discharge port of a mold. However, in such a molding method, the depth of the embossed pattern is shallow, and the limit is about 1 m/m.
If the embossed pattern is made deeper than that, there are disadvantages in that the shape of the molded plate loses its shape and that the embossing roll cannot be rotated, making embossing impossible.

It is also possible to apply a driving force to rotate the embossing roll, but in extrusion molding of inorganic compositions such as cement, the amount of discharge is unstable, so the cement molded body extruded from the extruder is A belt conveyor receiving system is used, which requires synchronization of the extrusion speed of the extruder and the running speed of the belt conveyor. Therefore, in extrusion molding where the amount of extrusion is not constant,
It is very difficult to maintain a constant linear speed, and even if you apply a driving force while measuring the linear speed with a sensor, the embossing roll will rotate, but since the embossed part of the inorganic composition will not escape, the cement board itself will rotate. It has the disadvantage that it tends to lose its shape and cracks.

Therefore, this invention solves the above-mentioned drawbacks and realizes a deep and beautiful embossed pattern.The main component of this invention is to install a mold at the tip of an extruder for cement admixture, etc. , the lower part of this mold is formed with an upwardly sloping side toward the discharge port, and an embossing roll that forms an uneven pattern is installed directly above the discharge port of the mold, and the concave portion of the embossing roll is Fill and supply hard cement admixture.

Therefore, according to the present invention, a deep embossed pattern with a depth of about 5 m/m can be easily formed on the inorganic surface of various cement boards, etc., and the molded product may lose its shape or cracks may occur on the surface. This has the effect of preventing the

Next, an embodiment according to the present invention will be described with reference to the drawings. Reference numeral 1 denotes an extruder in which a cement admixture 21 is kneaded, and a mold 2 for continuously extruding a cement board 18 is installed at the tip of the extruder 1. ing.

The mold 2 has a lower inclined side 7 formed in its lower portion 8 and facing upward toward the discharge port 22 in the forward direction.

Further, an upper sloped side 9 that opens a gap between the discharge ports 22 is formed in a part parallel to and opposite to the sloped side 7.

Next, concave portions 10, 10 and convex portions 11, 11 forming an uneven pattern approximately above the discharge port 22 of the mold 2 are formed.
Emboss rolls 3 are positioned to alternately form emboss rolls. The embossing roll 3 is rotatably fixed by a central support shaft 12 to a vertical mover 4 that adjusts the roll 3 to move up and down. Further, the vertical moving device 4 is equipped with an applicator 5 for applying a mold release agent such as vegetable oil to the outer peripheral surface of the embossing roll 3. Further, the vertical moving device 4 is equipped with several meshing umbrella wheels 15, 15, .
Lifting frames 16, 16 are installed to move the embossing roll 3 up and down by the operation. Reference numeral 6 denotes a product receiving stand that is slightly inclined in the direction of movement, and is adapted to flow by several feed rollers 17, 17 at the bottom. What is shown in FIG. 4 is a cement board 18 cut into predetermined dimensions, with convex patterns 19,
19... and concave patterns 20, 20... are alternately formed to express an embossed pattern.

The cement admixture 21 is made by appropriately mixing cement with reinforcing agents such as glass fiber, mica, and asbestos.

This invention consists of the above-mentioned structure, and now to explain the operating state of this device, firstly, the cement admixture 21 is supplied to the extruder 1, and the lower inclined side 7 in the mold 2 is fed.
The admixture 21 is pushed up along the inclination angle of about 15° to 40° between the upper inclined side 9 and the upper inclined side 9.
is compressed and applies a large torque to the embossing roll 3, entering the recesses 10, 10... of the embossing roll 3, adjusting the gap between the embossing roll 3 and the edge of the mold 2, and creating cement with the required wall thickness. The plate 18 is molded. This cement board 18 has a deep concave pattern 2.
0, 20... In other words, an embossed pattern can be produced. Moreover, at this time, the cement board is easily separated from the embossing roll 3 by application using the mold release agent applicator 5, and is successively extruded onto the product pedestal 6 and cut into a predetermined size while reliably preventing the cement board from losing its shape. It is used as a variety of building materials.

As described above, according to the embossing molding apparatus of the present invention, compared to the conventional method in which a molded product extruded from a mold is embossed after extrusion, the embossing device has a sufficient depth on the surface of a molded product such as a cement board. It has the advantage of being able to be molded very easily without losing its shape, and of preventing cracks from occurring on the surface of the molded product at the exit of the mold.

Since the lower part of the mold is formed with a lower inclined side that points upward toward the discharge port at the tip edge, it is easy to fill the admixture toward the recessed part of the embossing roll, and variations in linear speed are fully absorbed. Moreover, the escape of the material at the convex portion of the embossing roll has the effect of being sufficiently absorbed by increasing the linear speed. Such a thing is naturally impossible with conventional extrusion molding followed by embossing. Also,
By installing an embossing roll above the discharge port of the mold, the cement admixture from the extruder enters and fills the recesses of the embossing roll at the same time as it is extruded, making the filling reliable and strong. There is an excellent design effect in which the border line of the embossed pattern becomes very beautiful.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of a cement board embossing molding device, FIG. 2 is a sectional view of the main part of the mold, and FIG. 3 is a side view of FIG. Figure 4 is a perspective view of a cement board that is a molded product. 1 is an extruder, 2 is a mold, 3 is an embossing roll, 4 is a vertical mover, 5 is a release agent applicator, 7 is a lower inclined side, 8 is a lower mold, 10 is a recessed part, 11 is a convex part , 18 is a cement board, 21 is a cement admixture,
22 is a discharge port.

Claims (1)

[Claims] 1. In an embossing device for cement boards, etc., made by mixing reinforcing agents such as glass fiber, mica, and asbestos with cement, a mold 2 is installed at the tip of an extruder 1, and the mold 2 has a lower part. 8 is formed with a lower sloped side 7 facing upward toward the discharge port 22 in the forward direction, and an upper sloped side 9 is formed parallel to the lower sloped side 7 to open a gap facing each other. Concave portion 1 forming an uneven pattern approximately above the discharge port 22
An embossing roll 3 in which 0, 10 and convex parts 11, 11 are alternately formed is installed, and the embossing roll 3 is rotated by a vertical mover 4 that adjusts the embossing roll 3 up and down by a central support shaft 12. The vertical moving device 4 is equipped with an applicator 5 for applying a release agent such as vegetable oil to the outer peripheral surface of the embossing roll 3. is equipped with several umbrella wheels 15, 15 and a handle part 14 via a rotating shaft 13, and also equipped with elevating frames 16, 16 for vertically moving the embossing roll 3 by operating the handle part 14, An apparatus for embossing a cement board or the like, characterized in that the cement admixture 21 is filled and supplied into the recesses of the embossing roll 3 when it is in an unhardened state.