JP4592288B2 - Extruded cement board manufacturing method and extruded cement board manufacturing apparatus - Google Patents

Description

  The present invention relates to an extrusion cement board manufacturing method and an extrusion cement board manufacturing apparatus for extruding building materials such as outer walls and partition walls using a hydraulic material such as cement, and in particular, a hollow portion having a cross-sectional shape. The present invention relates to an improved technique for preventing deformation immediately after extrusion of an extrusion-molded cement board having slag.

  An extruded cement board obtained by kneading and extruding a hydraulic material such as cement with reinforcing fibers and admixtures is used as an outer wall or partition wall of a building. Extruded plates are cut into a predetermined length from a hydraulic material extruded from the extruder to the same shape as the opening of the die, and then placed on a curing iron plate (backing plate) for primary curing, autoclave curing, and finishing. It is manufactured through a process.

  As shown in FIGS. 3 and 4, the green plate 5 extruded from the die 3 of the extrusion molding machine 1 cannot be directly received by the receiving plate 7 because the molding machine becomes an obstacle. After being received on a roller conveyor 9 or a belt conveyor having a length and cut to a predetermined length, the sheet is transferred from below the roller conveyor 9 to a receiving plate 7 transferred by a conveying line 11. 3, 13 is a screw for slurry pressure feeding, 15 is an inner ball for forming a hollow part, and 17 in FIG. 4 is a receiving plate supply line for supplying the receiving plate 7 to the extrusion position. The above required length is set at a distance L necessary for inserting the receiving plate 7 corresponding to the maximum length of the extrusion-molded plate from the bottom of the roller conveyor 9. Must be moved.

  Conventionally, as shown in FIG. 5, the die 3 of the extrusion molding machine 1 has a longitudinal direction of the opening shape (the horizontal direction of FIG. 5) so that the green plate 5 is transferred to the receiving roller 9 a of the roller conveyor 9 in a horizontal posture. ) In the horizontal direction (direction perpendicular to the vertical direction) coincident with the raw plate width direction.

  However, the green plate 5 immediately after molding is in an uncured state and is in an unstable state, and the shape of the hollow portion 5a is originally as shown in FIG. 6 (a) while moving the roller conveyor 9 or the belt conveyor. However, as shown in FIG. 6B, there is a case where the upper side portion 5b of the hollow portion 5a hangs down.

For such problems, for example, in the inorganic extrusion molded article take-out device disclosed in Patent Document 1 below, in order to prevent deformation of the green plate, the same horizontal level as the extrusion surface of the molding die to be extruded, and A method is described in which a green plate is taken up on a synchronous conveyor synchronized with the extrusion speed and then transferred from a swing conveyor to a product pallet (receiving plate).
JP-A-5-310316

  In the inorganic extrusion molded article take-up device disclosed in the above-mentioned Patent Document 1, even a raw plate that is easily deformed can be transferred to a pallet in a stable state without applying impact or bending due to a step. It is possible to cure and cure almost without causing any deformation.

  However, in the manufacturing method using such an apparatus, the raw plates are sequentially transferred on the belt conveyor and finally transferred to the product pallet. Therefore, it is impossible to completely eliminate the deformation.

  In particular, when transferring from a roller conveyor or a belt conveyor to a curing receiving plate, a step is always generated between the conveyor and the receiving plate, so that deformation is likely to occur. In other words, the level difference between the roller conveyor and the backing plate is set so that the rollers gradually become smaller and the level difference between the backing plate and the backing plate becomes as small as possible, but the minimum level difference can be eliminated. In other words, it was a cause of deformation of the extruded green plate.

  Since the green board deformed in this way cannot be used as a building material, it can be returned to the extrusion molding machine as a raw material again if it is a small amount, but most of it has been discarded. As a result, the amount of production per hour was reduced, and the increase in waste resulted in an increase in cost.

  Moreover, the raw plate extruded and transferred to the receiving plate is subjected to primary curing at 50 to 60 ° C. and a humidity of 100%. In this curing, the backing plates are piled up on the shelf at a predetermined interval, but condensation occurs because the humidity is 100%. Since dew condensation also occurs on the back side of the backing plate, this dew condensation may drop on the surface of the product placed below, and water droplet traces may remain on the surface, causing the product quality to deteriorate. In order to prevent this, it can be prevented by covering it with a vinyl sheet, but this increases costs and generates waste.

  On the other hand, as shown in FIG. 7, there is also a method of bending the throttle tube 19 attached between the extrusion molding machine 1 and the die 3 at an angle of 70 to 90 degrees and receiving it with the receiving plate 7 from the lower side of the die. Although it is possible to prevent the raw plate from being deformed due to transfer to the process, the flow of the raw material to be extruded is bent by the throttle tube 19, so that the flow of the raw material becomes more complicated than that of a normal throttle tube, and the extrusion is performed. There was a problem that it became very difficult to adjust. If the flow becomes non-uniform, the quality of the product may vary. Further, if the throttle tube 19 is bent at an angle of 70 to 90 degrees, there is a problem that a large-scale modification of existing equipment such as transfer of an extruder is required.

  The present invention has been made in view of the above situation, and is capable of stabilizing the shape of a green plate with low shape retention immediately after extrusion without making a major modification of existing equipment and with high accuracy. An object of the present invention is to provide a method for producing a molded cement board and an apparatus for producing an extruded cement board, and to prevent the raw board from being deformed with simple equipment.

In order to achieve the above object, a method for producing an extruded cement board according to the present invention is a method for producing an extruded cement board obtained by extruding a slurry made of a hydraulic material as an uncured raw board by extruding a slurry having an extrusion opening from a rectangular base. It is a manufacturing method, Comprising: Extruding the slurry from the mouthpiece inclined so that the longitudinal direction of the extrusion opening forms a predetermined angle of 30 to 60 degrees with respect to the horizontal direction, The raw plate that is tilted and pushed out to form the predetermined angle with the horizontal direction is pushed across the extrusion direction from the side of the base by a receiving plate that is conveyed by the receiving and conveying means that intersects the extrusion direction. While receiving it while tilting to the predetermined angle,
The raw plate received while being inclined by the receiving plate is supported by a frictional force between the support plate formed on the receiving plate and supporting the lower end side of the raw plate, and the raw plate and the bottom plate of the receiving plate. It is characterized by doing.

In the method for producing an extrusion-molded cement board according to the present invention, a rectangular plate-like raw board extruded from a die is inclined, and in particular, the upper side portion of the hollow portion is inclined upright, and the deformation resistance is increased. Thereby, the deformation | transformation of the upper side part by gravity is reduced compared with the case of a horizontal attitude | position.

The receiving and conveying means can be disposed while avoiding the extrusion molding machine, and the raw plate can be directly received simultaneously with the extrusion, and can be transferred on the stable receiving plate after the receiving. In addition, unlike the conventional line, it is not necessary to arrange the roller conveyor and the conveyance line in multiple stages.

In the manufacturing method of the extrusion-molded cement board which concerns on this invention, the said raw board received with the said receiving board shall be transferred to the following process, making it incline at the said predetermined angle .

  In this method of manufacturing an extrusion-molded cement board, the raw board is transferred to the next process in an inclined posture, so that deformation due to gravity is reduced not only when the raw board is received but also during the conveyance process up to the next process. .

In the method for manufacturing extruded cement boards according to the present invention, the predetermined angle the raw plate was transferred tilted in, it can be made to curing treatment while it is inclined to the predetermined angle.

In this method of manufacturing an extruded cement board, in the case of horizontal accommodation, water condensed on the back side of the backing plate is caused to flow to one side during the primary curing in which many raw plates are accommodated in multiple stages. This prevents water drops from falling on the lower product surface.

An apparatus for producing an extruded cement board according to the present invention is an apparatus for producing an extruded cement board that extrudes a slurry made of a hydraulic material from an extrusion opening to obtain an uncured green board, and the extrusion opening has a rectangular shape. A die that is formed and inclined so that a longitudinal direction of the extrusion opening forms a predetermined angle of 30 to 60 degrees with respect to a horizontal direction, and the raw plate that is disposed so as to intersect the extrusion direction and is extruded from the die. A receiving and conveying means for conveying the receiving plate that is inclined at the predetermined angle while traversing the extrusion direction from the side of the base, and the receiving plate is received while being inclined by the receiving plate. The raw plate is supported by a frictional force between the support plate formed on the receiving plate and supporting the lower end side of the raw plate, and the raw plate and the bottom plate of the receiving plate .

In the manufacturing apparatus of the extrusion-molded cement board according to the present invention, the raw board having low shape retention can be extruded in an inclined posture in which the deformation resistance is increased. In addition, the receiving and conveying means can be disposed while avoiding the extrusion molding machine, and at the same time as the extrusion, the green plate can be directly received in an inclined posture. In addition, unlike the conventional line, it is not necessary to arrange the roller conveyor and the conveyance line in multiple stages.

  According to the method for producing an extruded cement board according to claim 1 of the present invention, the raw board is pushed out by inclining so that the plate surface forms a predetermined angle with the horizontal direction, and therefore, the upper side of the hollow part stands up diagonally. Therefore, deformation due to gravity can be reduced as compared to the horizontal posture. As a result, it is possible to stabilize the shape of the raw plate with low shape retention immediately after extrusion with high accuracy.

And, since the raw plate is received from the side of the die while crossing the extrusion direction by the receiving plate conveyed by the receiving conveying means crossing the extrusion direction, the raw plate is directly removed simultaneously with the extrusion while avoiding the extrusion molding machine provided with the die. After receiving, it can be transferred on a stable receiving plate, and deformation of the raw plate accompanying transfer, transfer, etc. can be prevented. Moreover, since it is not necessary to arrange | position a roller conveyor and a conveyance line in multistage like the conventional line, an installation can be simplified.

According to the method for producing an extrusion-molded cement board according to claim 2 of the present invention, the raw board received by the receiving board is transferred to the next process while being inclined at a predetermined angle. In addition, it is possible to further reduce the deformation due to gravity in the conveying process up to the next process and further stabilize the green plate shape.

According to the manufacturing method of extrusion molding a cement board according to claim 3, wherein according to the present invention, the raw plate was transferred to be inclined at a predetermined angle since the curing process remains in this angle, to accommodate the large number of raw plate to the multi-stage During primary curing, water condensed on the back side of the backing plate flows to one side of the backing plate, preventing water droplets from dropping onto the lower product surface that occurs when stored horizontally, and water droplet traces on the product surface. It is possible to prevent quality deterioration due to attachment.

According to the apparatus for manufacturing an extruded cement board according to claim 4 of the present invention, the die having the extrusion opening inclined and the raw plate received from the side of the die while being inclined at a predetermined angle while traversing the extrusion direction. Since the receiving plate and the receiving and conveying means for transferring the receiving plate are provided, the raw plate with low shape retention can be pushed out in an inclined posture with increased deformation resistance, and the receiving and conveying means avoids the extruder. The raw board can be directly received in an inclined posture simultaneously with the extrusion. Moreover, it is not necessary to arrange | position a roller conveyor and a conveyance line in multistage like the conventional line. As a result, the raw plate can be prevented from being deformed with simple equipment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a method for producing an extruded cement board and an apparatus for producing an extruded cement board according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of the vicinity of a base of the manufacturing apparatus according to the present invention as seen from the downstream side in the extrusion direction, and FIG. 2 is a plan view of the vicinity of the base shown in FIG.

  The extrusion cement board manufacturing apparatus 100 includes an extrusion molding machine 21 and a receiving and conveying means 23. The extruder 21 rotates a screw (not shown) located in the pressure feeding path 25 to pressure-feed a slurry obtained by kneading a reinforcing material, an admixture, and the like to a hydraulic material such as cement supplied from a hopper or the like to the throttle tube 27. . A base 29 is provided at the tip of the throttle tube 27, and the base 29 has a rectangular extrusion opening 31.

  An inner ball (not shown) is provided inside the base 29, and the inner ball has the same cross-sectional shape and forms a hollow portion in the green plate 33. Therefore, the slurry extruded from the die 29 is extruded as an uncured green plate 33 having a rectangular cross section in which the hollow portion extends in the extrusion direction.

  The base 29 is attached to the extrusion molding machine 21 so that the longitudinal direction of the extrusion opening 31 is inclined at a predetermined angle θ with respect to the horizontal direction. As the predetermined angle θ, for example, about 30 to 60 degrees is suitable for imparting deformation resistance to the raw plate 33 having low shape retention. Moreover, since the exit of the extrusion molding machine 21 is circular in front view and the attachment part of the throttle tube 27 to the extrusion molding machine 21 is also circular, the manufacturing apparatus 100 is modified for both the extrusion molding machine 21 and the throttle pipe 27. Without this, the base 29 can be easily inclined and attached by rotating the throttle tube 27 by 30 to 60 degrees.

  In this way, by pushing the slurry from the base 29 inclined such that the longitudinal direction of the extrusion opening 31 forms a predetermined angle θ with respect to the horizontal direction, the raw plate 33 has a plate surface that has a predetermined angle θ with the horizontal direction. It is designed to be pushed out at an angle.

  The receiving and conveying means 23 is arranged in a straight line in the b direction intersecting the extrusion direction a of the green plate 33. The receiving and conveying means 23 is also inclined so that the conveying surface 35 forms a predetermined angle θ with respect to the horizontal direction. The receiving and conveying means 23 can be configured by a roller conveyor or a belt conveyor. The receiving and conveying means 23 conveys the receiving plate 37 from the upper right side to the lower left side in FIG. The receiving plate 37 is formed with a support plate 33 a that supports the lower end side of the inclined raw plate 33. The receiving plate 37 holds the raw plate 33 by the support plate 33a and by frictional force with the bottom plate 33b.

  The receiving and conveying means 23 conveys the plurality of receiving plates 37 on which the raw plates 33 are placed in this way to the downstream side in the conveying direction at a predetermined interval. The conveyance interval of the receiving plate 37 and the pushing timing of the raw plate 33 from the base 29 are controlled to be synchronized. That is, the receiving and conveying means 23 conveys the receiving plate 37 from the side of the base 29 while traversing the extrusion direction a, so that the raw plate 33 pushed out of the base 29 is inclined at a predetermined angle θ. Can be received and transported directly.

  In this way, the receiving and conveying means 23 receives the green plate 33 while traversing the extrusion direction a from the side of the base 29, and therefore, simultaneously with extrusion while avoiding the base 21 a of the extrusion molding machine 21 provided with the base 29. The raw plate 33 can be directly received, and can be transferred on the stable receiving plate 37 after the reception. Thereby, the deformation | transformation of the raw board 33 accompanying a transfer, transfer, etc. is prevented. Moreover, since it is not necessary to arrange | position a roller conveyor and a conveyance line in multistage like the conventional line, an installation can be simplified.

  The raw plate 33 received by the receiving and conveying means 23 is transferred to the next process while being inclined at a predetermined angle θ. In the manufacturing apparatus 100, the raw plate 33 received by the receiving and conveying means 23 is transferred to the next process while being inclined at the predetermined angle θ, so that not only when the raw plate 33 is received but also in the transfer process up to the next step. The deformation due to gravity can be reduced, and the green plate shape can be stabilized.

  When the raw plate 33 transferred by the receiving and conveying means 23 arrives at the next step, for example, at the primary curing station, the raw plate 33 is subjected to a curing process by being stacked in multiple stages in the vertical direction while being inclined at a predetermined angle θ. In this primary curing, the curing process is performed while the raw plate 33 is placed on the receiving plate 37. Therefore, the water condensed on the back surface side of the receiving plate 37 flows to the one side along the receiving plate 37. As a result, it is possible to prevent water drops from dropping on the lower product, which occurs in the case of conventional horizontal accommodation, and to prevent deterioration in quality due to water droplet marks on the product surface.

  The green board 33 that has undergone the primary curing process is then subjected to an autoclave curing and finishing process to become an extruded cement board, and the production is completed.

  Therefore, according to the above method for producing an extruded cement board, the board surface is inclined so as to form a predetermined angle θ with the horizontal direction, and the raw board 33 is pushed out, so that the upper side of the hollow part is particularly inclined. Since deformation resistance is increased, deformation due to gravity can be reduced as compared with a horizontal posture. As a result, it is possible to stabilize the shape of the raw plate 33 with low shape retention immediately after extrusion with high accuracy.

  Further, according to the manufacturing apparatus 100 described above, the base 29 having the extrusion opening 31 inclined, and the receiving and conveying means 23 for receiving the raw plate 33 while being inclined at a predetermined angle while traversing the extrusion direction a from the side of the base 29. Therefore, the raw plate 33 having low shape retention can be pushed out in an inclined posture with increased deformation resistance, and the receiving and conveying means 23 can be arranged while avoiding the extrusion molding machine 21. 33 can be received directly in an inclined position. Moreover, it is not necessary to arrange a roller conveyor and a conveyance line in multiple stages like the conventional line. As a result, the raw plate 33 can be prevented from being deformed with simple equipment.

It is the front view which looked at the nozzle | cap | die of the manufacturing apparatus which concerns on this invention from the extrusion direction downstream. It is a top view of the nozzle | cap | die vicinity shown in FIG. It is a side view of the conventional manufacturing apparatus. It is a top view of the conventional manufacturing apparatus. It is a front view of the nozzle | cap | die vicinity in the conventional manufacturing apparatus. It is explanatory drawing which represented the raw board which a normal raw board (a), and the deformation | transformation produced in (b). It is a top view of the conventional manufacturing apparatus which bent the throttle tube.

  DESCRIPTION OF SYMBOLS 29 ... Base, 31 ... Extrusion opening, 33 ... Raw board, 23 ... Receiving conveyance means, 100 ... Manufacturing apparatus of an extrusion-molded cement board, a ... Extrusion direction, (theta) ... Predetermined angle

Claims (4)

A method for producing an extruded cement board, wherein a slurry made of a hydraulic material is extruded from a base having a rectangular extrusion opening to obtain an uncured green board,
By extruding the slurry from the base that is inclined so that the longitudinal direction of the extrusion opening forms a predetermined angle of 30 to 60 degrees with respect to the horizontal direction, the raw plate has a plate surface in the horizontal direction and the predetermined angle. Tilt to push out,
The raw plate pushed out at an angle is received while being inclined at the predetermined angle while crossing the extrusion direction from the side of the base by a receiving plate conveyed by a receiving conveyance means intersecting the extrusion direction,
The raw plate received while being inclined by the receiving plate is supported by a frictional force between the support plate formed on the receiving plate and supporting the lower end side of the raw plate, and the raw plate and the bottom plate of the receiving plate. A method for producing an extrusion-molded cement board.   2. The method for producing an extruded cement board according to claim 1, wherein the raw board received by the receiving board is transferred to the next step while being inclined at the predetermined angle.   3. The method for producing an extruded cement board according to claim 2, wherein the raw board that is inclined and transferred at the predetermined angle is subjected to curing treatment while being inclined at the predetermined angle. An apparatus for producing an extruded cement board that extrudes a slurry made of a hydraulic material from an extrusion opening and obtains an uncured green board,
The extrusion opening is formed in a rectangular shape and the base is inclined so that the longitudinal direction of the extrusion opening forms a predetermined angle of 30 to 60 degrees with respect to the horizontal direction;
Receiving transport means for transporting the receiving plate that is disposed so as to intersect the extrusion direction and that is pushed out from the base while being inclined at the predetermined angle while traversing the extrusion direction from the side of the base; Comprising
The receiving plate includes the support plate that is formed on the receiving plate and supports the lower end side of the raw plate, the raw plate, and the bottom plate of the receiving plate, the raw plate received while being inclined by the receiving plate. An apparatus for producing an extruded cement board, which is supported by the frictional force of

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