JPH09164517A - Forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an inorg. molded panel having deep embossed patterns and a dense surface by a dry or semi-dry method. SOLUTION: When a template 3 having embossed patterns on the surface thereof is introduced into a forming chamber and a raw material powder P is scattered over the template 3 to form a mat M, air is sent to the powder P from one side of the forming chamber 1 to sort the powder into a fine powder PF and a coarse powder PR and, further, the fine powder PF is sucked from the suction pipe 10 on the other side of the forming chamber 1 to be sprayed on one side of the forming chamber from an auxiliary air blower 7A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming apparatus used for manufacturing an inorganic molded plate having a surface with an uneven pattern by a dry or semi-dry method.

[0002]

2. Description of the Related Art In a conventional forming apparatus, as shown in FIG. 4, a template (3) having an uneven pattern (3) A on its surface is placed in a forming chamber (1) by a conveyor belt conveyor (2). Introduced, for example, a mixed powder P of cement and wood fibers, wood chips, etc. is conveyed on the supply belt conveyor (4) in the direction of arrow B, and a spraying roll that rotates in the direction of arrow C at the end of the supply belt conveyor (4). (5) The mixed powder P is dropped from the rear stage in the loosening forming chamber (1), and the supply belt conveyor (4) is cleaned by the cleaning brush (6) at the lower end side. The mixed powder P dropped into the forming chamber (1) is the main blower.
The blower (72) housed in the casing (71) of (7), through the duct (74) and the blower openings (73, 73), blows in the direction of arrow D as shown in arrow E. After being oriented in the same direction and sieved by the sieve frame (9), the finer powder PF is further selected by the wind blown from the blower ports (73, 73) in the forming chamber (1). The coarser powder PR drops and accumulates on the template plate (3) at the front stage, and the coarser powder PR drops and accumulates on the template plate (3) at the rear stage in the forming chamber (1), and the blower port (73, The air blown from (73) is collected in the circulation path (8) and blower (72)
Circulate. The coarsest powder PR remains on the sieve frame (9) and falls from the upper side of the sieve frame (9) as shown by the arrow to the last stage template in the forming chamber (1).
(3) Deposit on top. As described above, the template (3) is conveyed from the front side to the rear side in the forming chamber (1) by the conveyor belt conveyor (2) as described above. The powder is deposited, and a powder having a coarser particle size is deposited as going upward. Thus, as shown in FIG. 5, the mat M having a structure in which the grain size becomes finer downward is formed. The lower side of the mat M is the surface, and the uneven pattern (3A) derived from the template (3) is formed on the surface.

In the above forming device, the template (3)
The convex portion (31A) of the concave-convex pattern (3A) serves as a barrier to the wind blown from the blower (7), and it is difficult for the fine mixed powder PF to be filled in the front side of the convex portion (31A). , Coarse mixed powder PR
Is exposed to the lower side of the mat M to form a rough surface FR, and as a result, a rough portion is formed on the surface of the mat M and the uneven pattern on the surface is not sharply formed. In order to eliminate the problem, attach the auxiliary air blower (7A) to the lower part of the forming chamber (1) on the template transfer direction, facing the main air blower (7), and place it in the opposite direction to the main air blower (7). It has been proposed that the fine mixed powder PF is filled also in the front side of the convex portion (31A) of the template (3) by blowing air (Japanese Patent Publication No. 6-28849).

[0004]

The inorganic molded plate produced by the dry or semi-dry method is used, for example, as an outer wall material, but in the recent trend toward higher grades, for example, a tile pattern simulating natural stone. Products marked with are prized, and it is desired to form deeper joints on the surface of the product in order to cultivate the solid feeling of the tile pattern. However, in the above-mentioned conventional method, even if air is blown from the auxiliary air blower (7A) in the opposite direction to the main air blower (7), for example, in order to form a deep joint reaching a depth of 5 to 10 m / m. When the height of the convex portion (31A) of the concave-convex pattern (3A) of the template (3) is correspondingly increased, as shown in FIG.
It is difficult to fill the fine mixed powder PF on the front side of (31A), the rough surface FR is easily formed, and a problem that a sharp uneven pattern cannot be obtained occurs.

[0005]

[Means for Solving the Problems] As a means for solving the above-mentioned conventional problems, the present invention provides a forming chamber (1) in which a template (3) having an uneven pattern (3A) on its surface is introduced at the bottom. , Template (3) in the forming chamber (1)
Between the powder-dispersing means (4) and the template (3) and the powder-dispersing means (4) arranged on one side of the forming chamber (1) to the other side. Main blowing device (7) for blowing wind toward the forming chamber
(1) A main circulation path (8) which is open on one side and communicates with the main blower (7), a suction pipe (10) arranged on the other side in the forming chamber (1), A sub-blowing device (7A) arranged at the lower part of the other side of the forming chamber (1) for blowing air to one side, the suction pipe (10) and the sub-blowing device.
A forming device comprising a sub-circulation path (11) communicating with (7A).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described with reference to an embodiment shown in FIGS. 1 to 3. In the forming apparatus shown in the drawings, (1) is a forming chamber, and the bottom of the forming chamber (1) is A template (3) having an uneven pattern (3) A on the surface is arranged on the conveyor belt conveyor (2), and the template (3) is conveyed in the direction of arrow A by the conveyor belt conveyor (2). It Above the template (3), a supply belt conveyor (4) as a powder spraying means is arranged, and at the end of the supply belt conveyor (4), a supply brush is provided on the upper side.
(5), Cleaning brush (6) is located on the lower side. A blower (72) housed in a casing (71) on the template (3) transfer direction side (rear side) of the forming chamber (1).
And a main blower device (7) consisting of a pair of upper and lower blower ports (73, 73) communicating with the blower (72) through a distribution duct (74), and the blower port (73) is formed in the forming chamber. (1) The inside of the template (3) is designed to blow air in the direction opposite to the conveying direction (front side), and the forming chamber (1)
A main circulation path (8) for collecting the air blown from the blower port (73) and circulating it to the blower (72) is opened at the front side of the. Further, a sub-blower (7A) having a blower port (73A) is arranged in the lower part of the front side of the forming chamber (1),
The blower port (73A) blows air toward the rear side. The main circulation path (8) has an opening and the auxiliary blower (7
An air intake pipe (10) is inserted in the forming chamber (1) between the air intake port (73A) and the air intake port (1).
0) communicates with the sub air blower (7A) via the sub circulation path (11). The blower port (73) of the main blower (7) and the auxiliary blower (7
An air flow control valve (76, 76A) operated by a handle (75, 75A) is attached to the air blow port (73A) of (A), and the intake pipe (10) is fixed to the fixed pipe (10A). It has a telescopic structure consisting of a movable tube (10B) slidably fitted in a fixed tube (10A), and the movable tube (10B) is suspended from the ceiling of the forming chamber (1). Is supported by a lever (12) which is slidable back and forth. Further, a sieve frame (9) is installed in the forming chamber (1) so as to face the blower port (73) so that the tilt angle can be adjusted and the front and rear can be moved.

In the above forming apparatus, the powder P as the raw material is conveyed in the arrow B direction on the supply belt conveyor (4), and the spreading rolls which rotate in the arrow C direction at the end of the supply belt conveyor (4). (5) The powder P is dropped from the rear stage in the loosening forming chamber (1). The powder P is, for example, a cement, a silicic acid-containing substance, a curable inorganic powder such as gypsum, a reinforcing material such as wood chips, wood powder, pulp, wood fiber bundles, or a mixture of a small amount of water. If a bulky product made by branching and / or bending and / or bending is used, it becomes very easy to loosen the powder P by the spraying roll (5), and the powder P is evenly distributed on the template (3). Can be sprayed on. First, the powder P dropped into the forming chamber (1) is oriented in the front direction as shown by the arrow E by the wind blown from the blower port (73) of the main air blower (7) in the front direction shown by the arrow D. After being screened by the sieve frame (9), it is further ventilated (73)
The finer powder PF, which is selected by the wind blown from the above, falls and deposits on the template (3) at the previous stage in the forming chamber (1), and the coarser powder PR is formed in the forming chamber (1). ) Inside the lower template
(3) Drops and deposits on top, but at this time, a part of the fine powder PF is sucked into the main circulation path (8) and returned to the main air blower (7), and the air blown by the main air blower (7). The fine powder PF is mixed with the air blown from the mouth (73), and a part of the fine powder PF is sucked into the suction pipe (10).
Is also sucked into the sub-blower (7A) via the sub-circulation path (11)
Mix with the air blown from the blower port (73A) in the rearward direction as shown by arrow G. And the forming chamber (1)
The fine powder PF in the sub-blowing device (7
The air blown from the blower port (73A) of A) as described above causes the air to be oriented slightly in the rearward direction as shown by arrow C.
And the coarsest powder PR remains on the sieve frame (9)
(9) Drop from the top as shown by the arrow, and deposit on the template (3) at the last stage in the forming chamber (1). The template (3) is a conveyor belt conveyor as described above.
Since (2) conveys the inside of the forming chamber (1) from the front stage side to the rear stage side, the finest powder PF is deposited at the lowest position on the template (3), and the particle size increases as it goes up. Coarse powder PR will be deposited.

Thus, as shown in FIG. 3, the mat M having a structure in which the grain size becomes finer as it goes downward is formed. In the mat M, as described above, the fine powder PF is oriented slightly rearward by the wind blown from the blower port (73A) of the sub blower (7A) directly above the template (3), and Since the fine powder PF is also contained in the wind, as shown in FIG. 3, the fine powder PF also exists on the front side of the convex portion (31A) of the uneven pattern (3A) of the template (3). Is surely filled, and the rough surface FR as in the conventional mat M as shown in FIG. 5 is not formed.

Since the powder P of the raw material contains water, when it is deposited on the suction pipe (10), it solidifies and becomes a stone block-like substance, which is peeled off from the suction pipe (10) and is a sub air blower. (7A)
When mixed with the wind from the above, the auxiliary circulation path (11) and the auxiliary blower (7A) are clogged or mixed with the mat M to deteriorate the quality of the product, but in the present embodiment, the movable pipe (10B ) Diameter d
Is set smaller than the diameter D of the fixed tube (10A), and the movable tube (1
0B) is inserted into the fixed tube (10A), the powder P is not deposited on the movable tube (10B) and is smoothly sucked into the auxiliary circulation path (11). . Further types of raw materials and templates
The movable tube (10B) of the suction tube (10) is slid back and forth by the lever (12) in consideration of the height of the convex portion (31A) of the uneven pattern (3A) of (3) and the powder P Is adjusted so that an appropriate amount of the powder P is mixed with the air blown from the auxiliary air blower (7A). The lever (12) may be manually operated or electrically operated, but is preferably automatically controlled to operate according to a predetermined program.

Thereafter, the mat M is pressed and cured in a state where a plurality of the mats M are piled up together with the template (3) and cured,
Although it is an inorganic molded plate, normally a similar forming device is installed in the rear stage of the above forming device, and the mat is further laminated on the mat M. In this case, the forming device is reversed by the above forming device. The mat has a structure in which the upper surface is a fine powder and the particle size of the powder becomes coarser as it goes downward. In this way, an inorganic molded plate having a rough interior and a dense front and back surfaces can be obtained.
If the pattern (3) abutting on the mat M is also provided with an uneven pattern, an inorganic molded plate having a sharp uneven pattern on the front and back surfaces can be obtained.

[0011]

Therefore, according to the present invention, in the mat formed on the template, the lower surface, that is, the surface of the mat has a dense structure formed of fine powder, and the particle size becomes coarser toward the upper part of the mat. A coarse structure is formed by the powder, but by blowing the air containing the fine raw material powder from the auxiliary air blower into the forming chamber, even if the unevenness of the template is relatively high, The fine powder is surely filled in the front side of the part, and a sharp uneven pattern is formed on the uniform and dense surface of the mat.

[Brief description of the drawings]

 1 to 3 show an embodiment of the present invention.

FIG. 1 is a side view illustrating an apparatus

FIG. 2 is a plan view of the device.

FIG. 3 is an explanatory diagram of a state of a formed mat.

FIG. 4 is a side view illustrating a conventional device.

FIG. 5 is an explanatory view of a state of a conventional formed mat.

[Explanation of symbols]

 1 Forming chamber 2 Conveyor belt conveyor 3 Template 3A Concavo-convex pattern 4 Supply belt conveyor (powder scattering means) 7 Main air blower 7A Sub air blower 8 Main circulation path 10 Suction tube 10A Fixed tube 10B Movable tube 11 Sub circulation path

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[Procedure amendment]

[Submission date] February 26, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

Means for Solving the Problems The present invention provides a forming chamber (1) in which a template (3) having an uneven pattern (3A) on its surface is introduced at the bottom, as means for solving the above-mentioned conventional problems. , Template in the forming chamber (1)
Powder dispersal means (4) arranged above (3) and the template
(3) and the powder-dispersing means (4), which is arranged on one side of the forming chamber (1) and blows air toward the other side, and the forming chamber (1). a main circulation path in communication with opened main blower on the side of the other side of 1) (7) (8), the suction tube is arranged on the other side of the forming chamber (1) in (10), said A sub-blowing device (7A) which is arranged under the other side of the forming chamber (1) and blows air on one side, and a sub-circulation which connects the suction pipe (10) and the sub-blowing device (7A). A forming device comprising a path (11) is provided.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

Therefore, according to the present invention, in the mat formed on the template, the lower surface, that is, the surface of the mat has a dense structure formed of fine powder, and the particle size becomes coarser toward the upper part of the mat. A coarse structure is formed by the powder, but by blowing the air containing the fine raw material powder from the auxiliary air blower into the forming chamber, even if the convex portion of the uneven pattern of the template is relatively high, The fine powder is surely filled in the front side of the part, and a sharp uneven pattern is formed on the uniform and dense surface of the mat.

Claims (2)

[Claims] 1. A forming chamber into which a template having an uneven pattern on its surface is introduced, a powder spraying means disposed above the template in the forming chamber, the template and the powder sprayer. A main air blower which is arranged on one side of the forming chamber between the means and blows air toward the other side, and a main circulation path which is opened on one side of the forming chamber and communicates with the main air blower, A suction pipe arranged on the other side of the forming chamber, a sub-blowing device arranged on the lower part of the other side of the forming chamber for blowing air to the one side, the suction pipe and the sub-blowing device. Forming device characterized by comprising a sub-circulation path for connecting 2. The forming apparatus according to claim 1, wherein the suction tube is telescopic and expandable.