WO2023163055A1 - 混合撹拌装置、石膏ボードの製造装置、石膏ボードの製造方法 - Google Patents
混合撹拌装置、石膏ボードの製造装置、石膏ボードの製造方法 Download PDFInfo
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- WO2023163055A1 WO2023163055A1 PCT/JP2023/006511 JP2023006511W WO2023163055A1 WO 2023163055 A1 WO2023163055 A1 WO 2023163055A1 JP 2023006511 W JP2023006511 W JP 2023006511W WO 2023163055 A1 WO2023163055 A1 WO 2023163055A1
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- WIPO (PCT)
- Prior art keywords
- gypsum slurry
- gypsum
- mixer
- board
- base paper
- Prior art date
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 276
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 276
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- 238000003756 stirring Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 49
- 239000002002 slurry Substances 0.000 claims abstract description 192
- 238000007599 discharging Methods 0.000 claims abstract description 4
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- 238000001035 drying Methods 0.000 description 18
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- 229920002472 Starch Polymers 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
Definitions
- the present invention relates to a mixing and stirring device, a gypsum board manufacturing device, and a gypsum board manufacturing method.
- a gypsum board having a process of sequentially supplying a lower base paper, a gypsum slurry and an upper base paper onto a belt conveyor and sandwiching the gypsum slurry between the base papers of the lower base paper and the upper base paper to produce a molded body.
- the production method of (1) in the image of the pool of the gypsum slurry where the gypsum slurry flows from the mixer to the central portion in the width direction of the lower base paper, part of the boundary between the gypsum slurry and the base paper is preliminarily removed from the original image. and stored in an image analysis device, and captured by a camera as the position of the gypsum slurry changes.
- a method of manufacturing gypsum board is disclosed, characterized in that the position of the edge of the part is measured.
- gypsum board As disclosed in Patent Document 1, in manufacturing gypsum board, raw materials such as gypsum and water are mixed in a mixer to prepare gypsum slurry, and the surface of base paper for boards conveyed from the mixer is The gypsum slurry is applied to the top. Then, a gypsum board having a desired shape and size is manufactured by molding, drying, and cutting the board base paper and the gypsum slurry.
- the gypsum slurry is supplied from the mixer to a predetermined position, for example, the center of the base paper in the width direction of the base paper being transported. is preferably provided.
- a predetermined position for example, the center of the base paper in the width direction of the base paper being transported.
- the widthwise center of the board base paper transport path does not always coincide with the widthwise center of the board base paper.
- the gypsum slurry take-out device connected to the gypsum slurry outlet of the mixer is used to convey the base paper for boards when manufacturing products with the product width that is the most frequently produced. It was designed to be centered across the width of the road.
- the gypsum slurry take-out device means a chute such as a vertical chute or a horizontal chute, which is mainly made of metal and does not deform.
- the vertical chute means a chute that vertically removes the gypsum slurry from the mixer housing.
- the horizontal chute means a chute that takes out the gypsum slurry horizontally from the mixer housing.
- the boot chute and hose are connected to the gypsum slurry take-out device and are mainly made of a deformable material such as rubber, vinyl chloride, or silicon rubber.
- the stagnant gypsum slurry hardens and adheres to boot shoots and hoses, and the adherents grow to generate gypsum residue.
- the generated gypsum residue causes the stoppage of the manufacturing line due to cuts of base paper for boards.
- one aspect of the present invention aims to provide a mixing and stirring device that can easily change the supply position of the gypsum slurry.
- a mixer for preparing a gypsum slurry includes a housing, a rotating plate arranged in the housing, a rotating shaft connected to the rotating plate, a motor connected to the rotating shaft and rotating the rotating plate, and a gypsum slurry discharge device for discharging the prepared gypsum slurry,
- the mixer moving device provides a mixing and stirring device configured to be able to move at least the housing, the rotating plate, the rotating shaft, and the gypsum slurry taking-out device.
- FIG. 1 is an explanatory diagram of a mixing and stirring device according to an embodiment of the present invention.
- FIG. 2 is a perspective view of the peripheral portion of the housing of the mixer.
- FIG. 3 is an explanatory diagram of the internal structure of the housing of the mixer.
- FIG. 4 is an explanatory diagram of a gypsum board manufacturing apparatus.
- FIG. 5 is an explanatory diagram of a gypsum board manufacturing apparatus.
- the inventor of the present invention conducted a study to create a mixing and stirring device that can easily change the supply position of the gypsum slurry. As a result, it was found that by making at least part of the mixer for preparing the gypsum slurry movable, which was conventionally thought to be fixed and used, the feeding position of the gypsum slurry could be easily changed. completed.
- the mixing and stirring device 10 of the present embodiment can have a mixer 11 for preparing gypsum slurry and a mixer moving device 13.
- FIG. 1 schematically shows a side view of the mixing and stirring device 10 of the present embodiment.
- At least part of the mixer 11, which was conventionally fixed and used, is configured to be movable by the mixer moving device 13, thereby facilitating the position of the gypsum slurry discharge device 114 of the mixer 11 that discharges the gypsum slurry. Adjustable. Therefore, the mixing and stirring device 10 can easily change the supply position of the gypsum slurry.
- the mixer 11 is not particularly limited as long as it can mix gypsum, which is the raw material of the gypsum slurry, water, and various additives.
- FIGS. 2 is a perspective view of the periphery of the housing 111 of the mixer 11, and FIG. 3 is a partially broken perspective view showing the internal structure of the housing 111 of the mixer 11.
- FIG. 3 is a partially broken perspective view showing the internal structure of the housing 111 of the mixer 11.
- the housing 111 includes an upper plate 111A, a lower plate 111C arranged to face the upper plate 111A, and an upper plate 111A and a lower plate 111C arranged between the lower plate 111C. side plate 111B.
- the housing 111 has a mixing/stirring area for mixing and stirring raw materials such as supplied gypsum of Paris, water, and additives in an interior surrounded by an upper plate 111A, a lower plate 111C, and a side plate 111B.
- the mixing and stirring area is an area inside the housing 111 surrounded by the upper plate 111A, the lower plate 111C, and the side plate 111B, and is an area where gypsum, which is a raw material of the gypsum slurry, water, and various additives are mixed. is.
- the housing 111 can have a flat cylindrical shape. Therefore, the upper plate 111A and the lower plate 111C have a plate-like shape, and can have a circular shape as shown in FIG. 2, for example. Also, the side plate 111B can have a circular shape when viewed from above the upper surface of the upper plate 111A.
- the side plate 111B is arranged between the upper plate 111A and the lower plate 111C, they are arranged at a predetermined interval in the height direction. Therefore, as described above, a mixing/stirring area for mixing the supplied raw materials is formed in the housing 111 .
- an internal pressure adjusting means may be provided in any part of the housing 111, for example, the upper plate 111A. can. (Rotating plate)
- the mixer 11 can then have a rotating plate 32 having a disc shape (see FIG. 3).
- Rotating plate 32 can be placed in housing 111 as shown in FIG.
- the rotating plate 32 is rotatably arranged, and in the mixer 11, by rotating the rotating plate 32, for example, in the direction of arrow R, the raw materials supplied into the mixing and stirring area are rotated in the outer peripheral area by the action of centrifugal force. It can be flowed in a direction, mixed and stirred.
- the rotating plate 32 mixes and agitates the raw materials supplied to its upper surface by applying centrifugal force, so that the upper surface of the rotating plate 32 and the lower surface of the upper plate 111A are separated from each other. , can be arranged to have a constant spacing.
- the size of the rotating plate 32 is not particularly limited, but the diameter of the rotating plate 32 and the diameter of the inner circumference of the side plate 111B should be approximately the same so that the raw materials supplied to the inside of the housing 111 can be uniformly mixed. It is preferable to choose a size. However, a clearance can be provided between the two so as not to come into contact with the inner peripheral surface of the side plate 111B when the rotating plate 32 is rotated.
- FIG. 3 shows a circular plate with a smooth outer periphery 32A as the rotating plate 32, it is not limited to such a form.
- Rotating plate 32 may also have multiple teeth along its perimeter 32A. By providing the toothed portion in this way, it is possible to uniformly mix the supplied raw materials.
- the toothed portion can be formed by providing a notch in the outer periphery 32A, that is, by arranging irregularities on the outer periphery 32A.
- a plurality of pins or the like may be arranged perpendicularly to the upper surface of the rotating plate 32 so that the supplied raw materials are mixed more uniformly.
- they can be arranged at regular intervals along the outer circumference of the rotating plate 32 or arranged along the diameter direction of the rotating plate 32 .
- the rotary plate 32 may be provided with the above-described toothed portion, and further the above-described pin may be arranged.
- the mixer 11 can also have a scraper 33.
- a scraper 33 having a rod-like shape can be further arranged above the upper surface of the rotating plate 32 and inside the mixing and stirring area.
- the scraper 33 can be installed, for example, on the upper surface of the annular base 31 connected to the rotating shaft 112 described later.
- the scraper 33 can be configured to rotate via the annular base 31 together with the rotation of the rotating shaft 112 .
- the scraper 33 By providing the scraper 33, it is possible to remove gypsum of Paris and the like adhering to the lower surface of the upper plate 111A and the inner peripheral surface of the side plate 111B. In addition, the supplied calcined gypsum, water, additives, etc. can be particularly uniformly mixed. In order to suppress wear, the scraper 33 may have a structure in which a part or all of its surface is coated with a thermally sprayed film, or a structure in which a ceramic plate is adhered. (Axis of rotation)
- the rotating plate 32 is rotatably disposed within the housing 111 as described above, and the mixer 11 can have a rotating shaft 112 connected to the rotating plate 32 to rotate the rotating plate 32 .
- the rotating shaft 112 may be connected to the rotating plate 32, and its arrangement is not particularly limited. Can connect.
- the rotating shaft 112 is preferably inserted into the housing 111 from below and connected to the rotating plate 32 .
- the rotating shaft 112 By arranging the rotating shaft 112 as described above, equipment such as a motor connected to the rotating shaft 112 can also be placed below the housing 111 . Therefore, the degree of freedom of layout above the housing 111 can be increased.
- the rotating shaft 112 can be connected to the lower surface of the rotating plate 32 as described above, but it can also be connected to the upper surface of the rotating plate 32 via the annular base 31 or the like by providing a through hole in the rotating plate 32 .
- the mixer 11 can further have a motor 113 connected to the rotating shaft 112 and configured to rotate the rotating plate 32 via the rotating shaft 112 . Between the rotary shaft 112 and the motor 113, a transmission device or the like can be provided as required.
- the motor 113 may be configured to rotate the rotating shaft 112 along its central axis, that is, to rotate the rotating shaft 112 about its central axis. It is preferably arranged below 111 .
- the motor 113 is preferably supported by a pedestal 12 that supports the mixer 11 and is connected to the mixer moving device 13 as shown in FIG. 1, for example. That is, it is preferable that the mixer moving device 13 is configured so that the motor 113 is also movable.
- the motor 113 can be moved along with the movement of the housing 111 and the like of the mixer 11, and the position of the mixer 11 can be displaced particularly easily.
- the mixer 11 has a gypsum slurry extracting device 114 that discharges the gypsum slurry prepared inside the housing 111 to the outside of the housing 111 by mixing and stirring raw materials such as calcined gypsum in a mixing and stirring area within the housing 111 .
- the gypsum slurry take-out device 114 can be provided on the side plate 111B or the lower plate 111C of the housing 111, and can be, for example, a cylindrical chute.
- the gypsum slurry extraction device 114 can be a vertical chute or a horizontal chute, and can be arranged to connect with openings provided in the side plate 111B and the bottom plate 111C as described above.
- the vertical chute means a chute for taking out the gypsum slurry from the mixer housing in the vertical direction.
- the horizontal chute means a chute that takes out the gypsum slurry horizontally from the mixer housing.
- the gypsum slurry extraction device 114 can include a gypsum slurry conveying pipeline that connects between the cylindrical chute and the opening provided in the housing 111 as necessary.
- the gypsum slurry removal device 114 is preferably a non-deformable chute made of metal, for example.
- a boot chute, a hose, or the like can be connected to the gypsum slurry take-out device 114 as necessary.
- FIG. 1 and the like show an example in which one gypsum slurry take-out device 114 is provided in the housing 111
- the mixer 11 is not limited to such a form, and the mixer 11 has a plurality of outlets and is connected to the outlets. It can also have a gypsum slurry take-out device or the like.
- the upper plate 111A of the housing 111 may be provided with a raw material supply port for supplying a raw material such as calcined gypsum to the mixing and stirring area in the housing 111 .
- a raw material supply port can be formed by forming a through hole in the upper plate 111A.
- the raw material supply port is connected to the raw material supply pipe 115 and the raw material hopper 116, and the material is mixed and stirred through the raw material hopper 116, the raw material supply pipe 115, and the raw material supply port.
- Raw materials can be supplied within the region.
- FIG. 1 and the like show an example in which one raw material supply pipe 115 is provided, the present invention is not limited to such a configuration, and a plurality of raw material supply pipes can be provided depending on the type and number of raw materials to be supplied.
- (2) Mixer moving device The mixing and stirring device 10 of this embodiment can have a mixer moving device 13 .
- the mixer moving device 13 can move at least a part of the mixer 11, specifically, the housing 111, the rotating plate 32, the rotating shaft 112, and the gypsum slurry removing device 114, as shown in FIG.
- FIG. 1 shows an example in which the mixer moving device 13 has wheels 131 and guides 132 such as rails and is configured to be movable along the double arrow A, it is not limited to such a form.
- the mixer moving device 13 is not particularly limited as long as it can move the mixer 11 in one or more arbitrary directions.
- the mixer moving device 13 can have wheels, sliders, and the like.
- the mixer moving device 13 can also have a guide 132 such as a rail for restricting the moving direction of a rotating member such as a wheel, if necessary.
- the mixing and agitating device 10 of the present embodiment includes a mixer moving device 13, and is configured so that the positions of the housing 111 of the mixer 11 and the gypsum slurry taking-out device 114 can be changed. Therefore, the positions of the gypsum slurry take-out device 114 and the like can be changed according to the position of the board paper being conveyed, and the prepared gypsum slurry can be supplied from the gypsum slurry take-out device 114 to the optimum position.
- the mixer moving device 13 can move at least the gypsum slurry discharge device 114 for discharging the gypsum slurry, the housing 111 connected thereto, the rotating plate 32 included in the housing 111, and the rotating shaft 112 in the mixer 11. It should be configured as follows. However, it is more preferable that the mixer moving device 13 is configured so as to move the motor 113, the raw material supply pipe 115, etc., together.
- a control device (not shown) is connected to the mixer moving device 13, and the position of the gypsum slurry discharge port in the gypsum slurry take-out device 114 of the mixer 11 is set to a predetermined position according to the position of the transported board paper. It can also be configured to be automatically adjustable.
- the mixing and agitating device 10 can be provided with a detection device for detecting the position of the edge of the board base paper in the width direction and the position of the gypsum slurry outlet in the gypsum slurry extraction device 114 .
- the mixing and stirring device 10 can also include a driving device such as a motor used when moving the housing 111 or the like by the mixer moving device 13 .
- the control device, the detection device, and the drive device are capable of transmitting and receiving control signals, positional information of the width direction end portions of the board base paper, positional information of the gypsum slurry outlet, and other detection information. can be wired or wirelessly connected to
- the optimal positions of the gypsum slurry take-out device 114 and the like of the mixer 11 may be recorded in advance for each product type to be manufactured, and the positions of the gypsum slurry take-out device 114 and the like of the mixer 11 may be adjusted according to the product type to be manufactured.
- the above positions may be stored in a storage device, and the controller may adjust the positions of the gypsum slurry take-out device 114 and the like of the mixer 11 according to the input product type.
- the mixing and stirring device 10 may have stoppers or fixing means so that the positions of the gypsum slurry removing device 114 and the like of the mixer 11 do not change after the positions of the gypsum slurry removing device 114 and the like of the mixer 11 are adjusted.
- the stopper or fixing means for example, a driving device with a brake, etc., pressing with a cylinder or the like, pinching, or the like can be used, and various methods can be used.
- Base The mixing and stirring device 10 of the present embodiment can also have a base 12 which is a frame that supports the mixer 11 and connects the mixer 11 and the mixer moving device 13 as necessary.
- the pedestal 12 be configured so that it can also support incidental equipment of the mixer 11 such as the motor 113 described above.
- the pedestal 12 is preferably configured so that the surface 12A facing the lower plate 111C of the mixer 11 can transport board paper.
- the surface 12A may be a flat surface, and may have a roll or the like as necessary.
- the surface 12A facing the lower plate 111C of the mixer 11 is configured so that the base paper for board can be conveyed, so that the mixing and stirring apparatus 10 of the present embodiment is inserted and arranged in the gypsum board manufacturing apparatus, and the base paper for board is supplied. By doing so, the gypsum board can be easily manufactured.
- the gypsum board manufacturing apparatus 40 of the present embodiment can be provided with the mixing and stirring apparatus 10 described above. Since the mixing and stirring device 10 has already been explained, the explanation is omitted here.
- the mixing and agitating device 10 described above is provided with a mixer moving device 13, and is configured so that the positions of the gypsum slurry take-out device 114 and the like of the mixer 11 can be changed. For this reason, according to the gypsum board manufacturing apparatus 40 of the present embodiment, the positions of the gypsum slurry take-out device 114 and the like of the mixer 11 are changed according to the position of the board base paper 41 being conveyed, and the optimum position is obtained.
- the gypsum board manufacturing apparatus of the present embodiment can have a base paper transport path for transporting and supplying board base paper in addition to the mixing and stirring device 10 .
- the gypsum board manufacturing apparatus 40 shown in FIG. Each has a stencil transport path 422 for two boards.
- a surface 12A, which is a part of the base 12 of the mixing/stirring device 10, serves as a board stencil transport path between the first board stencil transport path 421 and the second board stencil transport path 422.
- the X axis is the direction parallel to the transport direction of the board stencil 41, and the Y axis is the width direction of the board stencil 41. Also, the Z-axis is in the height direction.
- the board stencil 41 is conveyed along the block arrow B from right to left in the figure.
- the board base paper transport path should be configured so that the board base paper can be transported and supplied below the gypsum slurry take-out device 114 . Therefore, when viewed from above, that is, along the Z-axis in FIG. can be arranged to be located in At least a portion of the board paper transport path may be positioned below both the casing 111 of the mixer 11 and the gypsum slurry take-out device 114 of the mixer 11 .
- the board base paper transport path can also have, for example, a support plate for supporting the board base paper, and one or more transport devices selected from various rolls, belt conveyors, roll conveyors, and the like. That is, the board stencil transport path can have one or more types selected from, for example, a support plate and a transport device.
- the support plate is not particularly limited as long as it supports the base paper for board and does not interfere with the transportation of the base paper for board.
- the support plate may be, for example, a flat plate.
- the material of the support plate is also not particularly limited, and metal or the like can be used, for example.
- the center O114 of the gypsum slurry take-out device 114 is the board base paper transported on the board base paper transport path. It is preferably located in a central region A1 including the widthwise center of 41 .
- the fact that the center O114 of the gypsum slurry take-out device 114 is located in the central region A1 including the center of the board base paper 41 in the width direction means that when the gypsum slurry take-out device 114 and the board base paper 41 are viewed from above, the gypsum slurry is taken out.
- the center O114 of the device 114 is positioned within the central region A1 between the straight lines L1 and L2.
- the distance D1 between the straight line L1 and the center line CL and the distance D2 between the straight line L2 and the center line CL are preferably 15%, more preferably 10%, of the width W41 of the board base paper 41. more preferred.
- the center in the width direction of the board base paper 41 is a point on the center line CL in FIG.
- the gypsum slurry take-out device 114 has, for example, a cylindrical shape. Therefore, the center O114 of the gypsum slurry take-out device 114 is the cylindrical portion of the gypsum slurry take-out device 114 when viewed from above the gypsum slurry take-out device 114, that is, when viewed along the Z-axis in FIG. It means the center of the circumscribed circle or the minimum containing circle of the outline.
- the center O114 of the gypsum slurry take-out device 114 By positioning the center O114 of the gypsum slurry take-out device 114 within the central region A1 including the center in the width direction of the board base paper 41 conveyed on the board base paper conveying path, the surface of the board base paper 41 is evenly coated. A gypsum slurry can be supplied.
- the center O114 of the gypsum slurry take-out device 114 should coincide with the center line CL, which is the center in the width direction of the board base paper 41, when viewed from above the gypsum slurry take-out device 114 and the board base paper 41. is more preferred.
- the rotation center O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 are arranged on a straight line parallel to the width direction of the board base paper 41 conveyed on the board base paper conveyance path. is preferred. That is, it is preferable that the straight line L3 connecting the rotation center O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 is arranged in the width direction of the board base paper 41, that is, along the Y axis in FIG. .
- parallel here does not mean in a strict geometric sense, but the line L3 connecting the rotation center O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 and the width direction of the board base paper 41. are arranged in parallel. For example, if the angle formed by the width direction of the board base paper 41 and the straight line L3 is within 5°, they can be considered parallel.
- the gypsum board manufacturing apparatus of the present embodiment can also have members other than the mixer and board base paper transport path described above.
- the gypsum board manufacturing apparatus of the present embodiment can also have, for example, board base paper and a molding device that molds the gypsum slurry supplied onto the board base paper into a predetermined shape.
- the gypsum board manufacturing apparatus includes a drying device for drying water in the gypsum slurry, a cutting device for molding the base paper for boards and the gypsum slurry, cutting the hardened material, and an unloading device for unloading the manufactured gypsum board.
- a drying device for drying water in the gypsum slurry
- a cutting device for molding the base paper for boards and the gypsum slurry, cutting the hardened material
- an unloading device for unloading the manufactured gypsum board.
- FIG. 5 shows a configuration example of the gypsum board manufacturing apparatus 40 of the present embodiment other than the surroundings of the mixing and stirring device.
- FIG. 5 shows only the mixer 11 of the mixing/stirring device 10 .
- Board base paper 41 which is a surface material, is transported along the production line from the right side to the left side in FIG.
- the board base paper 41 is sometimes called a front cover base paper, and the board base paper 51, which will be described later, is called a back cover base paper, and the like.
- the calcined gypsum which is the raw material of the gypsum slurry, water, and in some cases, various additives can be kneaded to produce the gypsum slurry.
- foam is added from the gypsum slurry extraction device 114 or the gypsum slurry collection ports 117 and 118 provided in the housing 111, and the gypsum slurry having an arbitrary density is obtained by adjusting the amount of foam added.
- a gypsum slurry take-out device may be arranged at the fractionation ports 117 and 118 . For example, by adjusting the amount of foam added, it is possible to prepare the first gypsum slurry 53 and the second gypsum slurry 54 having different densities.
- the foam can also be fed to mixer 11 with the other ingredients of the gypsum slurry rather than to the fractionator.
- the obtained first gypsum slurry 53 is supplied onto the board base paper 41 and the board base paper 51 on the upstream side of the roll coater 55 through the delivery pipes 521 and 522 .
- the upstream side means the upstream side in the conveying direction of the board base papers 41 and 51 .
- the first gypsum slurry 53 on the board base papers 41 and 51 respectively reaches the spreading section of the roll coater 55 and is spread at the spreading section.
- the roll coater 55 has a coating roll 551, a receiving roll 552, and a scum removal roll 553, and the first gypsum slurry 53 is spread by these rolls.
- a thin layer of the first gypsum slurry 53 is formed on the base papers 41, 51 for boards.
- FIG. 5 shows an example in which the roll coater 55 is used to apply the first gypsum slurry 53 to the board base papers 41, 51
- the present invention is not limited to such a form.
- the roll coater 55 may be used to apply the first gypsum slurry 53 to only one of the board base papers 41 and 51 .
- the first gypsum slurry 53 can be placed only on the side edges of the board base paper 41 .
- the board base paper 41 which is the front cover base paper, is conveyed as it is, and the board base paper 51, which is the back cover base paper, is turned in the direction of the conveyance line of the board base paper 41 by the turning roll 56. Both of the board base papers 41 , 51 then reach the forming device 57 .
- the second gypsum slurry 54 is supplied from the mixer 11 through the gypsum slurry take-out device 114 between the thin layers formed on the board base papers 41 and 51 .
- a layer formed by the first gypsum slurry 53, a layer formed by the second gypsum slurry 54, and a layer formed by the first gypsum slurry 53 are formed between the base papers 41 and 51 for boards. can form a continuous laminate in which
- first gypsum slurry and the second gypsum slurry it is not limited to the form using the first gypsum slurry and the second gypsum slurry. It can be.
- a gypsum slurry having a predetermined density is supplied and deposited on board base paper that is continuously transported. Then, the board base paper 41 is folded along the scored lines on both end edges so as to involve the gypsum slurry. At this time, the base paper for board 51 conveyed at the same speed is superimposed on the layer of gypsum slurry. It is then shaped by passing through a shaping device 57 which determines the thickness and width of the gypsum board.
- a gypsum board can also be formed by the above procedure.
- the drying device On the downstream side of the forming device 57, the drying device, the cutting device, the unloading device, etc. can be arranged as required.
- gypsum board has been described as an example, but the present invention is not limited to such a form.
- various gypsum-based building materials can be manufactured by changing the base paper for boards, which is the surface material, to glass fiber non-woven fabric (glass tissue), glass mat, etc., and burying it on the surface or near the surface.
- the method for manufacturing a gypsum board according to the present embodiment can have a slurry preparation step and a supply step.
- the slurry preparation step is a step of preparing a gypsum slurry with the mixer of the mixing and stirring device described above.
- the supply step is a step of supplying gypsum slurry from a gypsum slurry take-out device of the mixer onto the transported board base paper.
- the slurry preparation step In the slurry preparation step, the raw material containing calcined gypsum and water can be kneaded using the mixer of the mixing and stirring device described above.
- the calcined gypsum contained in the raw material is also called calcium sulfate hemihydrate, and is an inorganic composition having hydraulic properties.
- one or more types of gypsum selected from natural gypsum, by-product gypsum, flue gas desulfurization gypsum, etc. are fired in air or water (including steam). Either ⁇ -type or ⁇ -type calcined gypsum alone or a mixture of both can be used as calcined gypsum.
- the gypsum of Paris used in the method for producing a gypsum board of the present embodiment may contain type III anhydrous gypsum, which is produced in a small amount when obtaining the gypsum of Paris, without any problem.
- ⁇ -type calcined gypsum requires pressure firing of dihydrate gypsum such as natural gypsum in water or steam using an autoclave. Also, ⁇ -type calcined gypsum can be produced by calcining dihydrate gypsum such as natural gypsum in the atmosphere under normal pressure.
- Water can be added in order to knead calcined gypsum and the like to form a gypsum slurry.
- the amount of water to be added when forming the gypsum slurry is not particularly limited, and the amount can be arbitrarily added according to the required fluidity and the like.
- the raw material of the gypsum slurry can contain arbitrary components other than the calcined gypsum and water described so far.
- foam can be added when forming a gypsum slurry.
- the specific gravity of the resulting gypsum board can be adjusted to a desired range.
- the method of adding foam when forming the gypsum slurry is not particularly limited, and it can be added by any method.
- a foaming agent foaming agent
- water water for foam formation
- the bubbles are formed by stirring while taking in air.
- a gypsum slurry containing bubbles can be obtained by adding the formed bubbles to a gypsum slurry formed by mixing gypsum of Paris and water or the like in advance.
- the foaming agent used for foam formation is not particularly limited, but examples include sodium alkyl sulfate, alkyl ether sulfate, sodium alkylbenzene sulfonate, and polyoxyethylene alkyl sulfate.
- the amount of foam added is not particularly limited, and can be arbitrarily selected according to the specific gravity required for the gypsum board (plaster-containing board) to be produced.
- the raw materials include adhesiveness improvers such as starch and polyvinyl alcohol that improve the adhesion between surface materials such as base paper for boards and gypsum cores, inorganic fibers such as glass fibers, lightweight aggregates, vermiculite, etc. refractory materials, setting modifiers, water reducing agents, bubble diameter modifiers such as sulfosuccinate surfactants, and various additives conventionally added to raw materials for gypsum board such as water repellents such as silicone and paraffin.
- adhesiveness improvers such as starch and polyvinyl alcohol that improve the adhesion between surface materials such as base paper for boards and gypsum cores, inorganic fibers such as glass fibers, lightweight aggregates, vermiculite, etc. refractory materials, setting modifiers, water reducing agents, bubble diameter modifiers such as sulfosuccinate surfactants, and various additives conventionally added to raw materials for gypsum board such as water repellents such as silicone and paraffin.
- the raw materials When the raw materials are kneaded to prepare the gypsum slurry, all the components constituting the raw materials may be kneaded simultaneously, or the kneading may be performed in multiple batches. For example, after mixing and kneading the solid components of the raw materials to form a gypsum composition, liquid components such as water among the raw materials are added to the obtained gypsum composition and further kneaded with a mixer to form a gypsum slurry. You can also (supply process) In the supply step, the gypsum slurry can be supplied from the gypsum slurry take-out device 114 of the mixer 11 onto the board base paper being supplied and transported.
- the method for producing a gypsum board according to the present embodiment may further include any other steps than the slurry preparation step and supply step. (Adjustment process)
- the method for manufacturing a gypsum board according to the present embodiment can also have an adjustment step of adjusting the position of the gypsum slurry take-out device 114 of the mixer 11 of the mixing/stirring device 10 according to the position of the board base paper.
- the mixing and stirring device 10 used in the gypsum board manufacturing method of the present embodiment has the mixer moving device 13 as described above, and can adjust the position of the gypsum slurry take-out device 114 of the mixer 11 . Therefore, in the adjusting process, it is possible to adjust the position of the gypsum slurry take-out device 114 to a predetermined position according to the position of the transported board base paper.
- the content of adjustment of the position of the gypsum slurry take-out device 114 in the adjustment process is not particularly limited.
- the center O114 of the gypsum slurry take-out device 114 is the board base paper 41 transported on the board base paper transport path. It is preferably located in a central region A1 including the center in the width direction (see FIG. 4). Since the central area A1 has already been explained, the explanation is omitted here.
- the gypsum is mixed so that the center O114 of the gypsum slurry take-out device 114 of the mixer 11 is located in the widthwise central region A1 of the board base paper 41 conveyed on the board base paper conveying path. It is preferable to adjust the position of the slurry removal device 114 .
- the gypsum slurry take-out device 114 By positioning the center O114 of the gypsum slurry take-out device 114 in the central region A1 in the width direction of the board base paper 41 conveyed on the board base paper conveying path, the gypsum slurry is uniformly applied to the surface of the board base paper 41. can supply.
- the center O114 of the gypsum slurry take-out device 114 preferably coincides with the center line CL, which is the center of the board base paper 41 in the width direction, when the board base paper 41 is viewed from above.
- the center of rotation O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 are arranged on a straight line parallel to the width direction of the board stencil 41 being supplied and transported on the board stencil transport path. preferably. That is, it is preferable that the straight line L3 connecting the rotation center O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 is arranged in the width direction of the board base paper 41, that is, along the Y axis in FIG. .
- the rotation center O32 of the rotary plate 32 and the center O114 of the gypsum slurry take-out device 114 are aligned on a straight line parallel to the width direction of the board base paper 41 transported on the board base paper transport path. It is preferable to adjust the position of the gypsum slurry extraction device 114 so that it is positioned.
- a control device (not shown) automatically adjusts the position of the gypsum slurry discharge port in the gypsum slurry take-out device 114 of the mixer 11 to a predetermined position according to the position of the transported board base paper.
- the mixing and agitating device 10 can be provided with a detection device for detecting the position of the edge of the board base paper in the width direction and the position of the gypsum slurry outlet in the gypsum slurry extraction device 114 .
- the mixing and stirring device 10 can also include a driving device such as a motor used when moving the housing 111 or the like by the mixer moving device 13 .
- the control device, the detection device, and the drive device are capable of transmitting and receiving control signals, positional information of the width direction end portions of the board base paper, positional information of the gypsum slurry outlet, and other detection information. can be wired or wirelessly connected to
- the optimum position of the gypsum slurry extraction device 114 may be recorded in advance for each product type to be manufactured, and the position of the gypsum slurry extraction device 114 may be adjusted according to the product type to be manufactured.
- the position may be stored in a storage device, and the control device may adjust the position of the gypsum slurry take-out device 114 according to the input product type.
- the adjustment process can be performed at any timing, such as when changing the type of gypsum board to be manufactured.
- the method for manufacturing the gypsum board of the present embodiment can also include, for example, a molding process, a curing process, a drying process, a cutting process, and a carrying-out process.
- the base paper for boards and the gypsum slurry supplied on the base paper for boards are molded to form a molded body of a desired shape.
- the gypsum slurry can be hydrated and hardened during the process of transporting the compact.
- the hardening process can be carried out by causing the calcined gypsum (hemihydrate gypsum) in the gypsum slurry to form needle-like crystals of gypsum dihydrate through a hydration reaction, and then congeal and solidify. Therefore, the gypsum of calcined water contained in the gypsum slurry reacts with water in the compact formed in the molding process, and the hydration reaction of the gypsum of calcined progresses, whereby the hardening process can be carried out.
- excess moisture contained in the gypsum slurry can be dried using a drying device or the like. It should be noted that the molded article that has undergone the curing process can be supplied to the drying process.
- the drying step is preferably carried out by forcibly drying the compact using a drying device.
- the method of forcibly drying the molded body with a drying device is not particularly limited, but for example, a drying device is provided on the transport path of the molded body, and the molded body is continuously dried by passing through the drying device. Allow to dry. It is also possible to carry the molded articles into a drying device and dry the molded articles batch by batch.
- the molded body obtained can be cut into a desired shape and size.
- the method for manufacturing a gypsum board according to the present embodiment can also have, for example, a first cutting step and a second cutting step as cutting steps.
- the molded body molded in the molding step can be roughly cut by a rough cutting cutter.
- the continuous molded body formed in the molding step can be cut to a predetermined length by a rough cutting cutter.
- the second cutting step for example, after the molded body has been dried in the drying step, it can be cut into products of a predetermined length.
- the obtained gypsum boards can be stacked using a lifter or the like, stored in a warehouse, or loaded onto a truck for shipment.
- gypsum board is used as an example, but the base paper for the board, which is the surface material, is changed to glass fiber non-woven fabric (glass tissue), glass mat, etc., and this is arranged so as to be buried on the surface or near the surface.
- glass fiber non-woven fabric glass tissue
- glass mat glass mat
- Various gypsum-based building materials can be produced by, for example,
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Abstract
Description
ミキサー移動装置と、を有し、
前記ミキサーは、筐体と、前記筐体内に配置された回転板と、前記回転板に接続された回転軸と、前記回転軸と接続され、前記回転板を回転させるモーターと、前記筐体内で調製した石膏スラリーを排出する石膏スラリー取出し装置と、を備え、
前記ミキサー移動装置は、少なくとも前記筐体、前記回転板、前記回転軸、および前記石膏スラリー取出し装置を移動可能に構成されている混合撹拌装置を提供する。
[混合撹拌装置]
本実施形態の混合撹拌装置について説明する。
(1)ミキサー
(筐体)
ミキサー11は、石膏スラリーの原料となる石膏や、水、各種添加剤を混合可能に構成されていれば良く、特に限定されないが、例えば筐体111を有することができる。
(回転板)
そして、ミキサー11は、円板形状を有する回転板32を有することができる(図3を参照)。回転板32は図3に示すように筐体111内に配置できる。回転板32は回転可能に配置されており、ミキサー11では、回転板32を例えば矢印Rの方向に回転させることで混合撹拌領域内に供給された原料を、遠心力の作用により外周領域において周方向に流動させ、混合、撹拌できる。
(回転軸)
回転板32は上述のように筐体111内で回転可能に配置されており、回転板32を回転させるため、ミキサー11は、回転板32に接続された回転軸112を有することができる。
(モーター)
ミキサー11は、さらに回転軸112と接続され、回転軸112を介して回転板32を回転させるように構成されたモーター113を有することができる。回転軸112と、モーター113との間には、必要に応じて変速装置等を有することもできる。
(石膏スラリー取出し装置)
ミキサー11は、筐体111内の混合撹拌領域で焼石膏等の原料を混合、撹拌することにより筐体111内で調製した石膏スラリーを筐体111の外に排出する石膏スラリー取出し装置114を有することができる。石膏スラリー取出し装置114は、筐体111の側板111Bや、下板111Cに設けることができ、例えば円筒形等の筒状のシュートとすることができる。石膏スラリー取出し装置114は、垂直シュートや、水平シュートとすることができ、上述のように側板111Bや、下板111Cに設けた開口部と接続するように配置できる。なお、垂直シュートは、ミキサー筐体から石膏スラリーを垂直方向に取り出すシュートを意味する。また、水平シュートは、ミキサー筐体から石膏スラリーを水平方向に取り出すシュートを意味する。
(原料供給配管)
筐体111の上板111Aには、筐体111内の混合撹拌領域に焼石膏等の原料を供給する原料供給口を設けておくことができる。なお、例えば上板111Aに貫通孔を形成することで原料供給口とすることができる。
(2)ミキサー移動装置
本実施形態の混合撹拌装置10は、ミキサー移動装置13を有することができる。ミキサー移動装置13は、図1に示すように少なくともミキサー11の一部、具体的には筐体111、回転板32、回転軸112、および石膏スラリー取出し装置114を移動可能に構成できる。
(3)架台
本実施形態の混合撹拌装置10は、必要に応じて、ミキサー11を支持し、ミキサー11とミキサー移動装置13とを接続するフレームである架台12を有することもできる。
[石膏ボードの製造装置]
例えば図4に示すように、本実施形態の石膏ボードの製造装置40は、既述の混合撹拌装置10を備えることができる。混合撹拌装置10については既に説明したため、ここでは説明を省略する。既述の混合撹拌装置10はミキサー移動装置13を備え、ミキサー11が有する石膏スラリー取出し装置114等の位置を変更可能に構成している。このため、本実施形態の石膏ボードの製造装置40によれば、搬送されているボード用原紙41の位置に応じて、ミキサー11が有する石膏スラリー取出し装置114等の位置を変更し、最適な位置に石膏スラリーを供給できる。また、混合撹拌装置10が有するミキサー11に故障等の不具合が生じた場合でも、ミキサー11の筐体111等をミキサー移動装置13により搬出し、他の予備機に入れ替えることで、製造ラインを止める時間を抑制し、石膏ボードの製造を継続することができる。
(ボード用原紙搬送路)
本実施形態の石膏ボードの製造装置は、混合撹拌装置10以外に、ボード用原紙を搬送、供給するボード用原紙搬送路を有することができる。例えば図4に示した石膏ボードの製造装置40は、ボード用原紙41の搬送方向において、混合撹拌装置10の上流側に第1ボード用原紙搬送路421を、混合撹拌装置10の下流側に第2ボード用原紙搬送路422をそれぞれ有している。第1ボード用原紙搬送路421と第2ボード用原紙搬送路422の間は混合撹拌装置10の架台12の一部である面12Aがボード用原紙搬送路となっている。
(その他の部材)
本実施形態の石膏ボードの製造装置は、上記ミキサー、ボード用原紙搬送路以外の部材を有することもできる。
[石膏ボードの製造方法]
本実施形態の石膏ボードの製造方法は、スラリー調製工程と、供給工程とを有することができる。スラリー調製工程は、既述の混合撹拌装置が有するミキサーにより石膏スラリーを調製する工程である。また、供給工程は、搬送されているボード用原紙上に、ミキサーが有する石膏スラリー取出し装置から石膏スラリーを供給する工程である。
(スラリー調製工程)
スラリー調製工程では、既述の混合撹拌装置が有するミキサーを用い、焼石膏、および水を含有する原料を混練することができる。
(供給工程)
供給工程では、供給、搬送されているボード用原紙上に、ミキサー11が有する石膏スラリー取出し装置114から石膏スラリーを供給できる。
(調整工程)
本実施形態の石膏ボードの製造方法は、ボード用原紙の位置に応じて、混合撹拌装置10が有するミキサー11の石膏スラリー取出し装置114の位置を調整する調整工程を有することもできる。
(成形工程、硬化工程、乾燥工程、切断工程、搬出工程)
本実施形態の石膏ボードの製造方法は、例えば成形工程や、硬化工程、乾燥工程、切断工程、搬出工程等を有することもできる。
11 ミキサー
111 筐体
111A 上板
111B 側板
111C 下板
112 回転軸
113 モーター
114 石膏スラリー取出し装置
115 原料供給配管
116 原料ホッパー
117、118 分取口
12 架台
12A 面
13 ミキサー移動装置
131 車輪
132 ガイド
A 両矢印
31 環状基部
32 回転板
32A 外周
O32 回転中心
33 スクレーパー
R 矢印
40 石膏ボードの製造装置
41 ボード用原紙(表面カバー原紙)
CL 中心線
W41 幅
B ブロック矢印
421 第1ボード用原紙搬送路
422 第2ボード用原紙搬送路
L1、L2、L3 直線
A1 中央領域
D1、D2 距離
51 ボード用原紙(裏面カバー原紙)
521、522 送出管
53 第1の石膏スラリー
54 第2の石膏スラリー
55 ロールコーター
551 塗布ロール
552 受けロール
553 粕取りロール
56 転向ロール
57 成形装置
Claims (7)
- 石膏スラリー調製用のミキサーと、
ミキサー移動装置と、を有し、
前記ミキサーは、筐体と、前記筐体内に配置された回転板と、前記回転板に接続された回転軸と、前記回転軸と接続され、前記回転板を回転させるモーターと、前記筐体内で調製した石膏スラリーを排出する石膏スラリー取出し装置と、を備え、
前記ミキサー移動装置は、少なくとも前記筐体、前記回転板、前記回転軸、および前記石膏スラリー取出し装置を移動可能に構成されている混合撹拌装置。 - 前記回転軸は、前記筐体の下方から前記筐体内に挿入され、
前記回転板に接続されている請求項1に記載の混合撹拌装置。 - 前記モーターは、前記筐体の下方に配置され、
前記ミキサー移動装置は、前記モーターも移動可能に構成されている請求項1または請求項2に記載の混合撹拌装置。 - 請求項1から請求項3のいずれか1項に記載の混合撹拌装置を備えた石膏ボードの製造装置。
- ボード用原紙を搬送するボード用原紙搬送路を有し、
前記ボード用原紙搬送路は、少なくとも一部が、前記ミキサーの前記筐体または前記ミキサーが有する前記石膏スラリー取出し装置の下方に位置する請求項4に記載の石膏ボードの製造装置。 - 請求項1から請求項3のいずれか1項に記載の混合撹拌装置が有する前記ミキサーにより石膏スラリーを調製するスラリー調製工程と、
搬送されているボード用原紙上に、前記ミキサーが有する前記石膏スラリー取出し装置から前記石膏スラリーを供給する供給工程と、を有する石膏ボードの製造方法。 - 前記ボード用原紙の位置に応じて、前記石膏スラリー取出し装置の位置を調整する調整工程を有する請求項6に記載の石膏ボードの製造方法。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2985219A (en) * | 1958-12-29 | 1961-05-23 | United States Gypsum Co | Process and apparatus for producing plasterboard |
JP2000296512A (ja) * | 1999-04-15 | 2000-10-24 | Tokuyama Corp | 建築用ボードの製造装置 |
WO2019058936A1 (ja) * | 2017-09-19 | 2019-03-28 | 吉野石膏株式会社 | ミキサーのスラリー吐出管及びスラリー吐出方法 |
CN213725911U (zh) * | 2020-09-24 | 2021-07-20 | 泰山石膏承德有限公司 | 一种石膏板用原料搅拌装置 |
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- 2023-02-22 CA CA3238648A patent/CA3238648A1/en active Pending
- 2023-02-22 WO PCT/JP2023/006511 patent/WO2023163055A1/ja active Application Filing
- 2023-02-23 TW TW112106732A patent/TW202348384A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2985219A (en) * | 1958-12-29 | 1961-05-23 | United States Gypsum Co | Process and apparatus for producing plasterboard |
JP2000296512A (ja) * | 1999-04-15 | 2000-10-24 | Tokuyama Corp | 建築用ボードの製造装置 |
WO2019058936A1 (ja) * | 2017-09-19 | 2019-03-28 | 吉野石膏株式会社 | ミキサーのスラリー吐出管及びスラリー吐出方法 |
CN213725911U (zh) * | 2020-09-24 | 2021-07-20 | 泰山石膏承德有限公司 | 一种石膏板用原料搅拌装置 |
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