JP4276591B2 - Manufacturing method of inorganic board - Google Patents

Description

  The present invention relates to a method for producing an inorganic board used as a building material such as an exterior material.

  Conventionally, an inorganic base plate containing a hydraulic material such as cement is formed by a papermaking method, and the surface of this inorganic base plate is given a pattern with joints such as tile pattern and brick pattern by press molding, and then cured and cured. By doing so, an inorganic plate is manufactured (see, for example, Patent Document 1). Such an inorganic board is used as a building material and the like, and an outer wall and the like are formed by adhering the inorganic board adjacent to the top, bottom, left, and right. If the pitch between joints does not match, the joints appear to be distorted and the appearance of the outer wall and the like is impaired. Therefore, the pitch between joints is adjusted in the press molding process so that the pitch between joints does not vary from one inorganic board to another and is constant according to the standard. As a method of adjusting the pitch between joints, there is a method of adjusting the moisture content (water content) of the inorganic raw plate after paper making and before press forming. In this case, if the moisture content of the inorganic raw plate before press molding is increased, the pitch between joints after press molding can be increased and increased, and if the moisture content of the inorganic raw plate before press molding is decreased, press molding is performed. The pitch between the subsequent joints can be reduced and reduced. In this way, when adjusting the moisture content of the inorganic raw plate, the suction pressure and paper making speed during paper making are adjusted, and the pitch between joints is confirmed even during production. If it is off, the moisture content of the inorganic raw plate is adjusted.

However, when a long inorganic raw plate is produced, the moisture content may be partially different, and it is difficult to adjust this. Further, the adjustment of the pitch between joints by adjusting the moisture content is slow in response, and it is difficult to achieve a desired moisture content. Furthermore, when a plurality of press forming lines are used for one paper making line, it is difficult to adjust the moisture content corresponding to each press forming line. In addition, when adjusting the papermaking speed to adjust the moisture content, the papermaking speed is increased or decreased, which affects the productivity. If the papermaking speed is lowered, the productivity may decrease. The speed adjustment range was about ± 0.5 m / min, and the water content could not be adjusted greatly.
JP 2002-321212 A

  This invention is made | formed in view of said point, and it aims at providing the manufacturing method of the inorganic board which can adjust the pitch between joints, without impairing productivity.

In the method for producing an inorganic plate of the present invention, an inorganic original plate 1 containing a hydraulic material is conveyed to a press machine 3 by a press belt conveyor 2, and a plurality of joints 4 are press-molded on the inorganic original plate 1 by a press machine 3. In the manufacturing method of the inorganic board which conveys the inorganic raw sheet 1 after press molding from the press machine 3 by the press belt conveyor 2, the carrying-in belt conveyor for carrying the inorganic original sheet 1 before press molding into the pressing belt conveyor 2 5 and a carry-out belt conveyor 6 for carrying out the press-formed inorganic original plate 1 from the press belt conveyor 2, and the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the inorganic original plate 1 of the carry-out belt conveyor 6. When the conveyance speed is the same and the measured value of the pitch L between the joints 4 is shorter than the specified value, the inorganic raw plate 1 of the carry-in belt conveyor 5 is conveyed If the transport speed of the inorganic base plate 1 of the belt conveyor 2 for press is made slower than the transport speed of the inorganic base plate 1 of the belt and the carry-out belt conveyor 6, and the measured value of the pitch L between the joints 4 is longer than the specified value, The inorganic base plate after press molding is made such that the transport speed of the inorganic base plate 1 of the belt conveyor 2 for press is made faster than the transport speed of the inorganic base plate 1 of the belt conveyor 5 and the transport speed of the inorganic base plate 1 of the carry-out belt conveyor 6. On the basis of the measurement result of the pitch L between the joints 4, the inorganic base plate 1 of the press belt conveyor 2 with respect to the transport speed of the inorganic base plate 1 of the carry-in belt conveyor 5 and the transport speed of the inorganic base plate 1 of the carry-out belt conveyor 6. It is characterized by adjusting the conveyance speed of the.

  In the present invention, the conveyance speed of the inorganic original plate 1 of the belt conveyor 2 for pressing is ± 3 m with respect to the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6. Can be adjusted within minutes.

  In the present invention, when the inorganic original plate 1 is carried into the press belt conveyor 2 from the carry-in belt conveyor 5 and when the inorganic original plate 1 is carried out from the press belt conveyor 2 to the carry-out belt conveyor 6, the inorganic original plate 1 is used. Are arranged between the carry-in belt conveyor 5 and the press belt conveyor 2 having different conveyance speeds and between the press belt conveyor 2 and the carry-out belt conveyor 6, and for this reason, parallel to the conveyance direction. The stress can be applied to the inorganic original plate 1 in any direction, and the pitch L between the joints 4 can be adjusted by expanding and contracting the inorganic original plate 1 by this stress. In this case, since the paper making speed of the inorganic raw plate 1 is not slowed down, productivity is not impaired.

  Further, the pitch L between the joints 4 is adjusted to the standard by adjusting the conveyance speed of the inorganic master plate 1 of the press belt conveyor 2 based on the measurement result of the pitch L between the joints 4 of the inorganic raw plate 1 after press molding. Thus, the conveying speed of the press belt conveyor 2 can be adjusted, and the pitch L between the joints 4 can be easily adjusted.

  Further, the conveyance speed of the inorganic original plate 1 of the press belt conveyor 2 is adjusted within ± 3 m / min with respect to the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6. Thus, the pitch L between the joints 4 can be adjusted within a large range.

  Hereinafter, the best mode for carrying out the present invention will be described.

  In the method for producing an inorganic plate of the present invention, first, an inorganic raw plate containing a hydraulic material is formed by a papermaking method. FIG. 2 shows an example of the papermaking apparatus A used in the present invention. This papermaking apparatus A includes a papermaking belt 10 formed in an endless loop shape, and the papermaking belt 10 is formed by a large number of rollers 11 so as to be able to travel in one direction. The papermaking belt 10 is formed with an inclined portion 12 which proceeds obliquely upward, and a feeder 13 for supplying slurry to the inclined portion 12 of the papermaking belt 10 is provided above the inclined portion 12. . Further, the papermaking belt 10 is formed with a horizontal portion 14 that travels substantially horizontally. A pressing belt 15 formed in an endless loop shape is disposed above the horizontal portion 14, and A suction box 16 is provided on the lower side. In the papermaking apparatus A, a receiving belt conveyor 17, a conveying roller 18, and a feeding belt conveyor 19 are provided at substantially the same height as the horizontal portion 14 of the papermaking belt 10. A cutting machine 20 is provided at the position of the conveying roller 18. The papermaking belt 10, the pressing belt 15, the receiving belt conveyor 17, and the feeding belt conveyor 19 are formed so that the conveyance speed can be adjusted by the controller 21.

  FIG. 3 shows an example of a press forming apparatus B used in the present invention. The press forming apparatus B is connected to the paper making apparatus A through a plurality of feed belt conveyors 19, and includes a carry-in belt conveyor 5, a press belt conveyor 2, a carry-out belt conveyor 6, and a plurality of conveyances. The belt conveyor 25 is formed so as to be arranged substantially horizontally. The press belt conveyor 2 is provided with a press machine 3, and an inter-joint measuring device 22 is disposed above the transport belt conveyor 25 disposed immediately after the carry-out belt conveyor 6.

  When manufacturing an inorganic board using the manufacturing apparatus which consists of the paper making apparatus A and the press molding apparatus B as mentioned above, it carries out as follows. First, the slurry is supplied onto the papermaking belt 10 from the supply machine 13. The slurry is prepared by appropriately mixing hydraulic materials such as cement, reinforcing fibers, aggregates, and the like with water. For example, the solid content is 40 to 60 parts by mass of cement and 40 to 40 parts of aggregate. Although it can be 60 mass parts and 0.5-10 mass parts of reinforcing fibers, and solid content concentration can be 80-100 mass%, it is not limited to this. Next, the slurry supplied onto the papermaking belt 10 is pressed by the pressing belt 15 to be formed into a plate shape, and then sucked and dehydrated by the suction box 16. In this way, the long inorganic raw plate 1 having a predetermined moisture content (for example, about 65 to 72%) is continuously formed.

  Next, the long inorganic original plate 1 is received from the papermaking belt 10 by the receiving belt conveyor 17 and then sent to the conveying roller 18. Then, the long inorganic raw plate 1 is cut into a predetermined size by the cutting machine 20 on the conveying roller 18.

  Next, the cut inorganic raw plate 1 is sent to the carry-in belt conveyor 5 of the press molding apparatus by a plurality of feed belt conveyors 19. Next, the inorganic original plate 1 is sent from the carry-in belt conveyer 5 to the press belt conveyer 2 and is carried in, and is press-molded between the upper and lower sides by the press machine 3 and vertically and horizontally grooved on the surface of the inorganic original plate 1. A plurality of joints 4 are formed, and the moisture content of the inorganic raw plate 1 is further reduced (for example, about 38 to 42%). Next, the press-molded inorganic raw plate 1 is sent from the press belt conveyor 2 to the carry-out belt conveyor 6 and is carried out, and then sent from the carry-out belt conveyor 6 to the transport belt conveyor 25. Next, the pitch L between the joints 4 is automatically measured by the joint-measuring instrument 22 on the conveyor belt conveyor 25. As shown in FIG. 4, the pitch L between the joints 4 is the interval between the plurality of joints 4 in the longitudinal direction (conveying direction) of the inorganic raw plate 1, and the pitch L between the joints 4 varies depending on the product size. It can be about 2300-2700 mm. Then, after that, the inorganic raw plate 1 in which the pitch L between the joints 4 is measured is sent to the curing and curing process and cured and cured. Thus, an inorganic board can be manufactured.

  In the manufacturing process of the inorganic board as described above, when the pitch L between the joints 4 is deviated from the specified value by the joint measuring device 22, the transport speed of the inorganic raw plate 1 of the carry-in belt conveyor 5 and the inorganic substance of the carry-out belt conveyor 6. The conveyance speed of the inorganic original plate 1 of the belt conveyor 2 for press is adjusted with respect to the conveyance speed of the original plate 1. In other words, when the measured value of the pitch L between the joints 4 is shorter than the specified value, the pressing belt conveyor 2 with respect to the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6. If the measured value of the pitch L between the joints 4 is longer than the specified value, the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance of the inorganic original plate 1 of the carry-out belt conveyor 6 are reduced. The conveyance speed of the inorganic raw plate 1 of the press belt conveyor 2 is increased with respect to the speed.

  Specifically, the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6 are 120 m / min, and the measured value of the pitch L between the joints 4 is shorter than the specified value. In this case, the conveyance speed of the inorganic original plate 1 of the press belt conveyor 2 is set to 119 m / min, and the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6 are -1. 0 m / min. In this case, as shown in FIG. 1, when the inorganic original plate 1 is transferred from the carry-in belt conveyor 5 to the press belt conveyor 2, the inorganic original plate 1 is different from the carry-in belt conveyor 5 and the press belt conveyor 2 with different conveying speeds. For this reason, the inorganic raw plate 1 contracts due to a stress opposite to the conveying direction. Next, the contracted inorganic original plate 1 is press-molded to form a plurality of joints 4, and then transferred from the press belt conveyor 2 to the carry-out belt conveyor 6. At this time, the inorganic original plate 1 has a different conveying speed. For this reason, the inorganic raw plate 1 is stretched by receiving stress in the same direction as the conveying direction, and as a result, between the joints 4. The pitch L is also extended. Therefore, the pitch L between the joints 4 shorter than the specified value is corrected so as to approach the specified value.

  Further, when the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6 are 120 m / min, and the measured value of the pitch L between the joints 4 is longer than the specified value, The conveyance speed of the inorganic original plate 1 of the press belt conveyor 2 is 121 m / min, and +1.0 m / min with respect to the conveyance speed of the inorganic original plate 1 of the carry-in belt conveyor 5 and the conveyance speed of the inorganic original plate 1 of the carry-out belt conveyor 6. To do. In this case, as shown in FIG. 1, when the inorganic original plate 1 is transferred from the carry-in belt conveyor 5 to the press belt conveyor 2, the inorganic original plate 1 is different from the carry-in belt conveyor 5 and the press belt conveyor 2 with different conveying speeds. Therefore, the inorganic raw plate 1 is stretched by receiving stress in the same direction as the conveying direction. Next, the expanded inorganic original plate 1 is press-molded to form a plurality of joints 4 and then transferred from the pressing belt conveyor 2 to the carry-out belt conveyor 6. At this time, the inorganic original plate 1 has a different conveying speed. For this reason, the inorganic base plate 1 contracts due to stress in the direction opposite to the conveying direction, and as a result, between the joints 4. The pitch L is also contracted. Therefore, the pitch L between the joints 4 longer than the specified value is corrected so as to approach the specified value by contracting.

  Thus, the pitch L between joints 4 is standardized by adjusting the conveyance speed of the inorganic base plate 1 of the belt conveyor 2 for press based on the measurement result of the pitch L between the joints 4 of the inorganic base plate 1 after press molding. Thus, the conveying speed of the press belt conveyor 2 can be adjusted, and the pitch L between the joints 4 can be easily adjusted. Further, by immediately feeding back the measurement result of the pitch L between the joints 4 and adjusting the conveying speed of the belt conveyor 2 for pressing, the pitch L between the joints 4 can be stabilized with good responsiveness (the solid line in FIG. 5). The arrows indicate that the measurement result of the pitch L between the joints 4 is fed back to the press belt conveyor 2). Moreover, since the papermaking speed of the inorganic raw plate 1 is not lowered, productivity is not impaired. Furthermore, as shown in FIG. 5, when two press forming apparatuses B are arranged for one paper making apparatus A, the pitch L between joints 4 can be individually adjusted by each press forming apparatus B. is there.

  In the present invention, the transport speed of the inorganic base plate 1 of the press belt conveyor 2 is adjusted within ± 3 m / min with respect to the transport speed of the inorganic base plate 1 of the carry-in belt conveyor 5 and the transport speed of the inorganic base plate 1 of the carry-out belt conveyor 6. It is preferable to adjust the pitch L between the joints 4 in a large range. If it deviates from this range, when the inorganic original plate 1 is disposed between the carry-in belt conveyor 5 and the press belt conveyor 2 and between the press belt conveyor 2 and the carry-out belt conveyor 6, the inorganic original plate 1 slides. There is a possibility that the stress applied to the surface becomes small and it is difficult to obtain the effect of the present invention.

  When the specified value of the pitch L between the joints 4 is about 2300 to 2700 mm, for example, when the measured value deviates about ± 1.0 mm from the specified value, the conveyance speed of the press belt conveyor 2 is adjusted. can do. Moreover, the moisture content at the time of papermaking of the inorganic raw plate 1 may be adjusted based on the measurement result of the pitch L between the joints 4, and the synergistic effect with the adjustment of the conveying speed of the press belt conveyor 2 further increases the distance between the joints 4. The range of adjustment of the pitch L can be widened (in FIG. 5, the dotted arrows indicate that the measurement result of the pitch L between the joints 4 is fed back to the papermaking belt 10).

  And the inorganic board manufactured by this invention does not remove | deviate the pitch L between the joints 4 greatly, and can match the joints 4 even if it bonds together the several inorganic board adjacent at the time of construction, Can be prevented.

It is the schematic which shows an example of embodiment of this invention. It is a schematic perspective view which shows the papermaking apparatus same as the above. It is a schematic perspective view which shows a press molding apparatus same as the above. It is a top view which shows the inorganic raw plate after press molding same as the above. It is the schematic which shows an example of other embodiment same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inorganic board 2 Belt conveyor for press 3 Press machine 4 Joint 5 Carry-in belt conveyor 6 Carry-out belt conveyor

Claims (2)

An inorganic raw material containing hydraulic material is conveyed to a press machine by a press belt conveyor. After pressing a plurality of joints on the inorganic raw material by the press machine, the pressed inorganic raw material is transferred from the press machine to a press belt conveyor. In the manufacturing method of the inorganic plate to be conveyed, the carrying-in belt conveyor for carrying the inorganic raw plate before press molding into the belt conveyor for press and the carrying-out belt conveyor for carrying out the inorganic raw plate after press molding from the press belt conveyor If the measured value of the pitch between joints is shorter than the specified value, the conveyance speed of the inorganic original plate of the carry-in belt conveyor is the same as the conveyance speed of the inorganic original plate of the carry-out belt conveyor. Bell for press against the conveyance speed and the conveyance speed of inorganic raw plate of carry-out belt conveyor If the conveyance speed of the inorganic master plate of the conveyor is slowed and the measured value of the pitch between joints is longer than the specified value, the transfer speed of the inorganic master plate of the carry-in belt conveyor and the conveyance speed of the inorganic master plate of the carry-out belt conveyor Based on the measurement result of the pitch between the joints of the inorganic base plate after press molding, the transport speed of the inorganic base plate of the carry belt conveyor and the inorganic base plate of the carry-out belt conveyor A method for producing an inorganic plate, characterized in that the conveyance speed of an inorganic raw plate of a press belt conveyor is adjusted with respect to the conveyance speed. 2. The conveyance speed of the inorganic original plate of the press belt conveyor is adjusted within ± 3 m / min with respect to the conveyance speed of the inorganic original plate of the carry-in belt conveyor and the conveyance speed of the inorganic original plate of the carry-out belt conveyor. The manufacturing method of the inorganic board of description.

Images