JP3759782B2 - Method for producing hydraulic inorganic molded body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a hydraulic inorganic molded body.
[0002]
[Prior art]
Movable water-permeable sheet as a method for continuously producing hydraulic inorganic molded plates mainly used as building materials such as roofing materials and wall materials, especially as a method for producing single-layer and thick molded plates A forming method called a flow-on system in which the raw material is supplied and expanded at once at a stretch and dehydrated under reduced pressure in the middle of movement by a suction means provided below the water-permeable sheet, and the excess water in the raw material is squeezed (See JP-A-53-54219).
[0003]
However, in the conventional flow-on method, only a flat molded plate can be formed.
Therefore, the corrugated plate is temporarily formed by laminating thin molded plates from a low-concentration cement slurry to form a flat plate once, and then aligning the flat plate with a desired corrugated mold. It is molded using a so-called Hatschek papermaking method that has been known for a long time.
[0004]
[Problems to be solved by the invention]
However, in the Hatschek papermaking method, a flat plate that contains almost no excess water is formed into a waveform along a desired wave shape mold. There is a problem that tensile stress is generated on the top mountain side and remains as residual stress, and a predetermined strength cannot be obtained in this portion, the durability is inferior, and a defect portion is likely to be formed.
[0005]
Moreover, if the radius of curvature of the wave is too small, there is a risk of cracking at the top, so the size of the wave shape is limited and the selectivity of the product is poor.
Furthermore, when the thickness of the forming plate is increased, the stress generated on the top of the wave peak also increases, and it is difficult to form a corrugated plate having a certain thickness or more.
[0006]
Therefore, in order to solve such a problem, the inventors of the present invention, from one side along the suction surface of the suction means formed in a shape along the uneven shape of one surface of the molded body to be molded. A developing roll that supplies the raw material from the raw material supply device onto the water-permeable sheet that proceeds toward the other side, and has a cross-sectional shape that conforms to the concavo-convex shape of the other surface of the molded body, and faces the suction surface. Is moved back and forth in the advancing direction of the water permeable sheet to shape the raw material supplied on the water permeable sheet between the spreading roll and the suction surface of the suction means, and the raw material is passed over the water permeable sheet by the suction means. The manufacturing method of the hydraulic inorganic molded object which squeezes the excessive water | moisture content in the inside is proposed previously (refer Japanese Patent Application No. 7-203143).
[0007]
That is, according to this method, since the raw material is shaped into a corrugated shape while maintaining fluidity, it is designed to be squeezed, so that various thicknesses and shapes having curved surfaces such as curved surfaces are formed. It became possible to produce the body uniformly and accurately continuously throughout.
However, this method still has a problem in forming a molded body having a large depth of unevenness.
[0008]
That is, in order to form a molded body having a large depth of unevenness, the shape of the developing roll must also be in accordance with the deep unevenness, and the radius of the developing roll is partially greatly different.
Therefore, the peripheral speed when the developing roll rotates is different between the large diameter part and the small diameter part, and the peripheral speed of the part where the radius of the developing roll is small becomes considerably slower than the moving speed of the raw material to be molded, and the developing roll is applied. It will rotate while sliding on the surface of the raw material to be shaped. And this may cause a problem that the surface of the molded body obtained may be peeled off or the appearance may be deteriorated.
[0009]
In view of such circumstances, the present invention is a hydraulic inorganic molded body that can be produced uniformly uniformly and accurately on the whole without causing poor appearance even if the molded article has deep irregularities. The object is to provide a manufacturing method.
[0010]
That is, according to the first invention of the present invention (hereinafter referred to as “the manufacturing method according to claim 1”) , the suction means formed in a shape along the concavo-convex shape of one surface of the molded body to be molded. While supplying the raw material from the raw material supply device onto the water-permeable sheet that proceeds from one side to the other side along the suction surface, the suction surface has a cross-sectional shape along the concave-convex shape of the other surface of the molded body The developing roll provided to face is reciprocated in the traveling direction of the water-permeable sheet, and while shaping the raw material supplied on the water-permeable sheet between the developing roll and the suction surface of the suction means, A method for producing a hydraulic inorganic molded body that squeezes excess moisture in a raw material through a water-permeable sheet by suction means, wherein the distance between the developing roll and the water-permeable sheet is that of the water-permeable sheet. When moving toward the row direction, gradually narrows along with the movement, whereas, when moving toward the side opposite to the traveling direction of the permeable sheet, a hydraulic cylinder to extend gradually along with the movement, pneumatic cylinder Alternatively, when the developing roll is moved up and down by a motor and then the developing roll comes to the reversal point of the reciprocating water-permeable sheet in the traveling direction, the width becomes the same as the thickness of the molded body to be molded. Thus, the manufacturing method of the hydraulic inorganic molded object characterized by reciprocating the said expansion | deployment roll is provided .
[0011]
Further, according to the second invention of the present invention (hereinafter referred to as “manufacturing method according to claim 2”), the suction means formed in a shape conforming to the concavo-convex shape of one surface of the molded body to be molded. While supplying the raw material from the raw material supply device onto the water-permeable sheet that proceeds from one side to the other side along the suction surface, the suction surface has a cross-sectional shape along the concave-convex shape of the other surface of the molded body The developing roll provided to face is reciprocated in the traveling direction of the water-permeable sheet, and while shaping the raw material supplied on the water-permeable sheet between the developing roll and the suction surface of the suction means, a method of manufacturing a hydraulic inorganic molded body dewater excess moisture in the raw material permeable sheet over the suction means, the thickness of the molded article to be molded a gap between the development roll and the permeable sheet After the raw material is expanded and pre-shaped, the pre-shaped raw material has a cross-sectional shape along the concavo-convex shape of the other surface of the molded body, and the water-permeable sheet advancing side of the raw material supply device A method for producing a hydraulic inorganic molded body, characterized in that it is shaped by a shaping roller that is rotatably supported on the sheet so that the distance from the water-permeable sheet is the same as the thickness of the molded article to be molded. Is provided.
[0012]
In the structure of the manufacturing method of the said Claim 1 and Claim 2, although a water-permeable sheet is not specifically limited, It is formed with felt, a nonwoven fabric, etc., and it is preferable to make it an endless belt shape.
Further, the water-permeable sheet is not particularly problematic as long as it has a shape that follows the cross-sectional shape of the suction means at the portion to which the raw material is supplied, but may be previously formed into a cross-sectional shape that matches the cross-sectional shape of the suction means. .
[0013]
The suction means is not particularly limited, but it is preferable to connect the suction box endlessly via a chain or the like so as to move at the same speed as the water-permeable sheet.
The developing rolls are preferably provided before and after the raw material supply port of the raw material supply device.
[0014]
A raw material will not be specifically limited if it is used for manufacture of a well-known hydraulic inorganic shaping | molding board.
Moreover, although the obtained molded object is not specifically limited, after completion | finish of shaping | molding, it can carry out curing hardening for a fixed time on predetermined conditions, and can also apply | coat after that as needed.
[0015]
In the manufacturing method according to claim 1, the method of raising and lowering the development roll is not particularly limited as long as the roll can be moved up and down to an arbitrary position. For example, a bearing is provided at the end of the development roll, and this bearing Can be raised and lowered with a hydraulic cylinder, pneumatic cylinder, motor or the like.
In the manufacturing method of claim 2, the shaping roll is not particularly limited, but it is preferable that the shaping roll is reciprocated at the same speed together with the developing roll.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows an example of a manufacturing apparatus used in the manufacturing method of claim 1.
As shown in FIG. 1, the manufacturing apparatus 1a includes a water-permeable sheet 2, a raw material supply apparatus 3a, and a suction means 4, and can form a forming plate 8 having a waveform as shown in FIG. .
[0017]
The water permeable sheet 2 is water permeable and has an endless belt shape, and rotates at a constant speed in the direction of arrow A in FIG. 1 via a drive roll 21 and a number of guide rolls 22.
As shown in FIG. 3, the driving roll 21 has a substantially bowl shape in which peaks and valleys are alternately arranged, and a pressing roll in which peaks and valleys arranged in the upper part are reversed. The water-permeable sheet 2 is fed in the direction of arrow A while being shaped into a wave shape on one surface of the molded plate 8 on which the water-permeable sheet 2 is molded.
[0018]
The suction means 4 includes a decompression box 5 and a number of suction boxes 6.
[0019]
A large number of suction boxes 6 are connected in an endless belt shape via an annular chain (not shown), and the sprockets 61 and 61 on which the chain is hung are rotated to drive the water-permeable sheet 2. The upper surface of each suction box 6 comes into close contact with the lower surface of the water-permeable sheet 2 when rotating in the same rotational direction at a constant speed and parallel to the upper parallel portion of the water-permeable sheet 2. ing.
[0020]
Further, as shown in FIG. 4, the suction box 6 has a suction surface 62 formed in a shape along the wave shape of one surface of the molded body to be molded, and a plurality of water absorption holes 63 are formed in the suction surface 62. Is drilled.
[0021]
The decompression box 5 is connected to decompression means such as a vacuum pump or a blower, and as shown in FIG. 4, decompression holes 51 and 51 are provided on the upper surface thereof, and the suction box 6 is received from below. It has become. And the hole 64 provided in the bottom of the suction box 6 which moved to the decompression box 5 by the rotational drive of the sprocket 61 coincides with the decompression hole 51, and the inside of the suction box 6 passes through the hole 64 and the decompression hole 51. The pressure is reduced, and excess water in the raw material can be squeezed out from the water absorption hole 63 through the water-permeable sheet 2.
[0022]
The raw material supply device 3a is configured to move back and forth in the moving direction of the water-permeable sheet 2 within the moving range 7 shown in FIG. 1, and as shown in FIGS. 4 and 5, the raw material supply pipe 31 and the developing roll 33 and 33 and a side plate (raw material outflow prevention plate) 36 are provided. As shown in FIG. 4, the two developing rolls 33, 33 are formed in a substantially bowl shape so as to coincide with the uneven shape, that is, the wave shape of the other surface of the molding plate 8 to be molded. The shafts 33a and 33a protruding from both ends are rotatably supported by the bearing 34, respectively.
[0023]
The bearing 34 is supported at the tip of an expansion / contraction rod 35a of a hydraulic cylinder 35 supported and fixed to the side plate 36. The expansion / contraction rod 35a expands and contracts by hydraulic pressure so as to move up and down. That is, the developing roll 33 is also moved up and down by this expansion and contraction.
[0024]
Further, the expansion and contraction movement of the telescopic rod 35a is interlocked with the reciprocation of the raw material supply device 3a, and when the raw material supply device 3a is moving in the traveling direction of the water permeable sheet 2, the movement of the raw material supply device 3a is performed. Accordingly, when the telescopic rod 35a is gradually extended and the raw material supply device 3a comes to the reversal position on the traveling direction side of the water-permeable sheet 2, the molded body is intended to obtain the space between the developing roll 33 and the water-permeable sheet 2. It extends to a position that is substantially the same as the thickness of 8, and the extension stops in that state. When the raw material supply device 3a is moving in the reverse direction, the telescopic rod 35a is gradually retracted as the raw material supply device 3a moves.
[0025]
That is, when the developing roll 33 moves to the traveling direction side of the water permeable sheet 2, the developing roll 33 moves while the distance from the water permeable sheet 2 is gradually narrowed, and has come to an inversion point on the traveling direction side of the water permeable sheet 2. The thickness of the molded body 8 to be obtained sometimes becomes substantially the same, and when moving in the opposite direction, the distance from the water permeable sheet gradually increases.
[0026]
The side plates 36 are arranged on the left and right (only one side is shown in the figure) so as to face both ends of the developing rolls 33, 33, and the lower end surfaces thereof are in sliding contact with the upper surface of the water permeable sheet 2, The raw material supplied to is prevented from protruding, and the side surface of the resulting molded plate 8 is formed smoothly.
[0027]
This manufacturing apparatus 1a is as described above, and a desired molded plate 8 can be manufactured as follows.
That is, first, the water permeable sheet 2 and the suction box 6 are rotated in the same direction at the same speed, and the raw material is supplied from the raw material supply device 3a onto the water permeable sheet 2 while reducing the pressure in the vacuum box 5 by the pressure reducing means. Supplied and developed by developing rolls 33 and 33.
[0028]
At this time, the suction surface 62 of the suction box 6 is formed in a corrugated shape, the water-permeable sheet 2 is also shaped along the suction surface 62, and the developing rolls 33, 33 are also substantially corrugated in section. The raw material is shaped into a waveform by the development of the rolls 33 and 33.
[0029]
Moreover, since the developing rolls 33 and 33 are moved up and down by the hydraulic cylinder 35, the rolls 33 and 33 can be shaped while applying a pressing force to the raw material on the water-permeable sheet 2, and the direction of travel of the water-permeable sheet 2 When moving to the side, the distance from the water-permeable sheet gradually decreases, and the thickness of the molded body 8 to be obtained when the water-permeable sheet 2 reaches the reversal point on the traveling direction side is substantially the same. When moving in the opposite direction, the distance from the water-permeable sheet is gradually increased, so that even a molded article with deep irregularities is less likely to be peeled. Therefore, it is possible to continuously obtain a compact with a fine structure and a good appearance.
[0030]
6 to 8 show an example of a manufacturing apparatus used in the manufacturing method of claim 2. As shown in FIGS. 6 to 8, in this manufacturing apparatus 1b, as in the manufacturing apparatus 1a, development rolls 37, 37 each having a substantially bowl shape are rotatably supported by bearings 38, 38 fixed to the raw material supply apparatus 3b. Has been.
[0031]
Moreover, the space | interval of the expansion | deployment roll 37 and the water-permeable sheet 2 is wider than the thickness of the molded object 8 which is going to shape | mold.
A shaping roll 9 is provided on the direction of travel of the water permeable sheet 2 of the raw material supply device 3b.
[0032]
The shaping roll 9 is substantially bowl-shaped like the developing roll 37, and is rotatably supported by a bearing 92 provided at the tip of a support arm 91 protruding from the raw material supply device 3b. 2 is substantially the same as the thickness of the molded body 8 to be molded.
The manufacturing apparatus 1b has the same configuration as that of the manufacturing apparatus 1a except for the above. First, the water permeable sheet 2 and the suction box 6 are rotated in the same direction at the same speed, and the pressure reducing unit 5 is decompressed. The raw material is supplied from the raw material supply device 3 a onto the water-permeable sheet 2 while being decompressed, and developed by the developing rolls 33 and 33.
[0033]
At this time, the suction surface 62 of the suction box 6 is formed in a corrugated shape, the water-permeable sheet 2 is also shaped along the suction surface 62, the developing rolls 37, 37 are also substantially corrugated in cross section, and are developed. Since the distance between the roll 33 and the water permeable sheet 2 is wider than the thickness of the molded body 8 to be molded, the raw material is preliminarily shaped into a preshaped body 81 having a thickness larger than that of the molded body 8.
[0034]
Next, the preshaped object 81 is further continuously shaped by the shaping roller 9.
[0035]
The shaping roller 9 has a substantially bowl shape like the developing roll 37, and the distance from the water permeable sheet 2 is substantially the same as the thickness of the molded body 8 to be molded. The shaped body 81 is pressed and shaped to the thickness of the shaped body 8 by the shaping roller 9, and the shaped body 8 having a predetermined thickness can be continuously produced.
That is, according to the manufacturing apparatus 1b, the raw material is preliminarily shaped with the developing roll 37, and the obtained preshaped body 81 is shaped while being pressed with the shaping roll 9, so that the cross section with the unevenness is deep. Even a molded body having a shape can be continuously produced with high accuracy and a uniform structure as a whole without causing peeling or poor appearance on the surface.
[0036]
The manufacturing method of the hydraulic inorganic molded object concerning this invention is not limited to said embodiment. For example, in the manufacturing apparatuses 1a and 1b, the raw material supply device 3a (3b) moves back and forth in the traveling direction of the water-permeable sheet 2, but a separate roll is provided behind the raw material supply device 3a (3b). If 33 (37) is provided, the material supply device 3a (3b) may be fixed.
[0037]
【The invention's effect】
Since the method for producing a hydraulic inorganic molded body according to the present invention is configured as described above, even if the molded body has a deep cross-sectional shape with irregularities, it does not cause peeling or poor appearance on the surface. , It can be manufactured continuously and uniformly with high accuracy.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a manufacturing apparatus used in a manufacturing method according to claim 1;
FIG. 2 is a perspective view of a molded body obtained by the manufacturing apparatus of FIG.
3 is a cross-sectional view of the manufacturing apparatus of FIG. 1 taken along the line XX.
4 is a cross-sectional view taken along line YY of the manufacturing apparatus of FIG.
FIG. 5 is an enlarged cross-sectional view of a raw material supply device portion of the manufacturing apparatus of FIG.
6 is a side view showing an example of a manufacturing apparatus used in the manufacturing method according to claim 2. FIG.
7 is a cross-sectional view of the manufacturing apparatus of FIG. 6 taken along the line ZZ.
8 is an enlarged cross-sectional view of a raw material supply device portion of the manufacturing apparatus of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a Manufacturing apparatus 1b Manufacturing apparatus 2 Water-permeable sheet 3a Raw material supply apparatus 3b Raw material supply apparatus 33 Deployment roll 37 Deployment roll 4 Suction means 5 Decompression box 6 Suction box 62 Suction surface 8 Molded plate (molded body)
81 Preshaped object 9 Shaped roll

Claims (2)

The raw material is supplied from the raw material supply device onto the water-permeable sheet that proceeds from one side to the other side along the suction surface of the suction means formed in a shape along the concave-convex shape of one surface of the molded body to be molded. In addition, a developing roll having a cross-sectional shape along the concave-convex shape of the other surface of the molded body is reciprocated in the traveling direction of the water-permeable sheet, and the developing roll and the suction means It is a method for producing a hydraulic inorganic molded body that squeezes excess moisture in a raw material through a water-permeable sheet by the suction means while shaping the raw material supplied between the suction surface and the water-permeable sheet,
When the developing roll moves in the direction of travel of the water permeable sheet, the distance between the developing roll and the water permeable sheet gradually decreases with the movement, and on the other hand, it moves toward the opposite side of the direction of travel of the water permeable sheet. The roll is moved up and down by a hydraulic cylinder, a pneumatic cylinder, or a motor so that it gradually spreads along with the movement, and then the roll roll reverses the reciprocating direction of the water-permeable sheet. A method for producing a hydraulic inorganic molded body, wherein the expansion roll is reciprocated so as to have the same width as the thickness of the molded body to be molded when the point is reached. The raw material is supplied from the raw material supply device onto the water-permeable sheet that proceeds from one side to the other side along the suction surface of the suction means formed in a shape along the concave-convex shape of one surface of the molded body to be molded. In addition, a developing roll having a cross-sectional shape along the concave-convex shape of the other surface of the molded body is reciprocated in the traveling direction of the water-permeable sheet, and the developing roll and the suction means It is a method for producing a hydraulic inorganic molded body that squeezes excess moisture in a raw material through a water-permeable sheet by the suction means while shaping the raw material supplied between the suction surface and the water-permeable sheet,
After the raw material is developed and preshaped by making the gap between the developing roll and the water-permeable sheet wider than the thickness of the molded product to be molded, the preshaped material is formed on the other surface of the molded product. A cross-sectional shape that conforms to the shape of the raw material supply device, and the forming roller that is rotatably supported on the water-permeable sheet in the raw material supply device has a width that is the same as the thickness of the molded product to be molded. The manufacturing method of the hydraulic inorganic molded object characterized by shape | molding so that it may become.

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