WO2019008626A1 - Lightweight concrete panel extrusion molding device, and lightweight concrete panel manufactured by said extrusion molding device - Google Patents

Abstract

Provided are a lightweight concrete panel extrusion molding device with which a groove having high shape accuracy can be reliably formed in a surface of a panel-shaped molded body that is molded from a thixotropic material mixture, and a lightweight concrete panel manufactured by said extrusion molding device. The lightweight concrete panel extrusion molding device comprises: a screw conveyer including a screw in which a blade is formed in a spiral shape around a horizontal shaft, and a columnar round bar that extends from the end on the downstream side of the screw; a hopper that feeds a material mixture onto the screw; a vibration plate that applies vibration to the material mixture fed from the hopper and molds the top surface of a panel-shaped molded body; and a thickness defining plate that defines the thickness of the molded body on the downstream side relative to the vibration plate. The vibration plate has a first protrusion that protrudes from an inner surface that contacts the material mixture and that extends from the upstream side to the downstream side. The thickness defining plate has a second protrusion that is continuous with the first protrusion, and that protrudes from an inner surface that contacts the material mixture and extends from the upstream side to the downstream side.

Description

Title: Extrusion apparatus for lightweight concrete panel and lightweight concrete panel produced by the extrusion apparatus

The present invention relates to a lightweight concrete panel extrusion apparatus suitable for extruding lightweight concrete panels, and a lightweight concrete panel manufactured by the extrusion apparatus.

DESCRIPTION OF RELATED ART Conventionally, the apparatus which extrusion-molds a lightweight concrete panel from the low fluidity raw material mixture is known (for example, refer patent document 1). The material mixture having low fluidity is effective for reducing material cost and the like, and includes, for example, cement, light-weight aggregate, inorganic material powder such as sand and gravel, water, etc. Have poor thixotropic properties.

The extrusion apparatus described above comprises a frame, a hopper for supplying a material mixture for lightweight concrete panels attached to the frame, and a screw conveyor for extruding the material mixture rotatably held on the frame from the upstream side to the downstream side; Is equipped. In the screw conveyor, a blade is formed spirally around an axis extending horizontally from the upstream side to the downstream side on the surface. Further, the above-mentioned extrusion molding apparatus is a diaphragm for vibrating the material mixture with low fluidity attached to the frame, and a mold for defining the thickness of the panel-like molded body on the downstream side with respect to the diaphragm attached to the frame. And a width defining plate as a mold that defines the width of the panel-like formed body attached to the frame.

In the above-described extrusion molding apparatus, when a material mixture having low fluidity is fed from the hopper into the frame, the material mixture is extruded from the upstream side to the downstream side by the screw conveyor which operates in rotation. If the material mixture with low flowability is merely extruded by a screw conveyor, a large void may be formed in the molded body. Therefore, vibration is applied to the material mixture extruded by the screw conveyor as described above by the diaphragm. In this case, the raw material mixture is stressed by the vibration of the diaphragm and is fluidized. For this reason, it is possible to prevent the formation of a large void in the extruded molded body due to the fluidization of the material mixture due to the vibration of the diaphragm.

In addition, the material mixture that has been fluidized as described above is further extruded downstream by the screw conveyor, and the flowability is lowered as it goes downstream, on the inner surface of the thickness regulating plate and the width regulating plate as a mold. It is pushed into the space surrounded by those boards while receiving the flow resistance in contact. When pressing of the material mixture is performed, hollow spaces corresponding to the outer shape of the screw conveyor are formed from the material mixture, and pressing of the material mixture onto the thickness regulating plate and width regulating plate causes the inner surfaces of those plates to be formed. The molded object in which the external shape according to the shape was formed is shape | molded. Therefore, it is possible to form a panel-like formed body having hollow holes, and to realize formation of a lightweight concrete panel.

Further, in the extrusion molding apparatus described in Patent Document 1 described above, since the inner surfaces of the upper and lower thickness regulating plates are flat, the shape of the surface and the shape of the rear surface of the lightweight concrete panel to be molded are both flat (in particular, FIG. 1) reference). In this respect, this extrusion molding apparatus produces a lightweight concrete panel in which the shape of the surface and the shape of the back surface are both flat.

WO 2007/114795

By the way, the lightweight concrete panel may be used for the outer wall material of a building, etc. in which the mortar which mixed cement and sand with water etc. is apply | coated with iron etc. on the surface. In order to make it easy to hold such mortar or the like on the surface of the lightweight concrete panel, it is effective that the surface shape of the lightweight concrete panel is one having irregularities or grooves.

As a method of forming a groove on the surface of a lightweight concrete panel, it is conceivable to provide a protrusion which conforms to the groove on the inner surface of a thickness regulating plate as a mold. However, in the extrusion molding apparatus described in Patent Document 1 described above, only by providing the ridges matching the grooves on the thickness defining plate located on the downstream side with respect to the diaphragm, it is the first time that the material mixture starts to decrease in fluidity. It will be mold-fitted to the ridge as a mold. For this reason, it is difficult to fully press the material mixture to the roots of the side walls of the ridges, and as a result, the shape accuracy of the grooves formed on the surface of the panel-like molded body formed is poor.

The present invention has been made to solve the above-mentioned problems, and reliably forms grooves with high shape accuracy on the surface of a panel-like molded body formed from a mixture of materials made of a thixotropic material. It is an object of the present invention to provide a lightweight concrete panel extrusion apparatus and a lightweight concrete panel manufactured by the extrusion apparatus.

The extrusion apparatus for a lightweight concrete panel according to the present invention, which has been made to solve the above-mentioned problems, is a screw rotatably formed on a frame and having a spirally formed blade around a horizontally extending shaft. Material conveyor for a light weight concrete panel mounted on the frame so as to be disposed above the screw conveyor, and a screw conveyor having a cylindrical round bar extending from the downstream end of the screw part and the screw part; A hopper for supplying the above-mentioned screw portion onto the screw portion, a diaphragm provided on the downstream side with respect to the hopper for vibrating the material mixture to form an upper surface of a panel-shaped molded body, and Thickness regulating plate provided on the downstream side for defining the thickness of the compact, and the compact provided on both sides of the screw conveyor A lightweight concrete comprising a width defining plate defining a width, and forming the material mixture into a panel shape by the diaphragm, the thickness defining plate, and the width defining plate while extruding the material mixture downstream by the rotation operation of the screw conveyor It is an extrusion molding apparatus of a panel, wherein the diaphragm has a first protrusion extending from the upstream side to the downstream side projecting from the inner surface in contact with the raw material mixture, and the thickness defining plate is the first And a second ridge extending from the upstream side to the downstream side projecting on the inner surface in contact with the raw material mixture, the second ridge being continuous with the ridge of the second groove.

According to this configuration, the first and second ridges of the diaphragm and the thickness regulating plate, which are continuous with each other, correspond to the ridges on the surface of the panel-like formed body in the process of extruding the material mixture. Grooves can be formed, and the surface shape of the molded body can be made to be a surface on which irregularities are formed. In addition, the material mixture supplied from the hopper is vibrated by the vibration of the diaphragm, so that the fluidity is enhanced. For this reason, since the raw material mixture can be pushed to the roots of both side walls of the first ridge of the diaphragm, the shape of the molded body on the upstream side with respect to the thickness defining plate can be a shape having a groove to some extent. And the groove | channel of a desired shape can be provided by carrying out the type | mold fitting of the molded object with the thickness prescription | regulation board which a protrusion follows with respect to a diaphragm. Therefore, grooves with high shape accuracy can be reliably formed on the surface of a panel-like molded body formed from a mixture of materials made of a thixotropic material.

Moreover, the lightweight concrete panel of the present invention has a groove formed on the surface, which is manufactured by the above-described extrusion molding apparatus.

It is a perspective view of the lightweight concrete panel manufactured by the extrusion molding apparatus of the lightweight concrete panel which concerns on one Embodiment of this invention. It is a block diagram of the extrusion molding apparatus of the lightweight concrete panel which concerns on this embodiment. It is sectional drawing at the time of cut | disconnecting the extrusion molding apparatus of the lightweight concrete panel which concerns on this embodiment by linear III-III shown in FIG. 2, and linear III'-III '. It is an expanded sectional view of the principal part of the extrusion molding apparatus of the lightweight concrete panel which concerns on this embodiment. It is a perspective view of the diaphragm or thickness regulation board with which the extrusion molding apparatus of the light weight concrete panel which concerns on this embodiment is provided. It is a principal part block diagram of the extrusion molding apparatus of the lightweight concrete panel which concerns on the modification of this invention. It is a principal part block diagram of the extrusion molding apparatus of the lightweight concrete panel which concerns on the modification of this invention.

Hereinafter, specific embodiments of a lightweight concrete panel extrusion molding apparatus and a lightweight concrete panel manufactured by the extrusion molding apparatus according to the present invention will be described with reference to the drawings.

The extrusion molding apparatus 10 which concerns on this embodiment is an apparatus which shape | molds and manufactures the lightweight concrete panel 12. As shown in FIG. The lightweight concrete panel 12 is used as a base for the outer wall of a building or the like. The lightweight concrete panel 12 is a panel formed into a panel shape or a plate shape as shown in FIG.

The lightweight concrete panel 12 includes cement, lightweight aggregate, inorganic material powder (eg, sand, gravel, etc.), water, etc. as a material, and in some cases, contains organic material powder (eg, wood, etc.) as a material May be. The mixing ratio (wt%) of the material of the lightweight concrete panel 12 is such that the ratio of cement is 20 to 30, the ratio of lightweight aggregate is 10 to 30, and the ratio of inorganic material powder is 50 to 60. The ratio of water is about half the weight of cement.

The lightweight concrete panel 12 preferably has a low cement content in order to minimize the material cost. Therefore, the material of the light weight concrete panel 12 is a mixture having low fluidity as compared with a general concrete material, and has a thixotropic property.

The lightweight aggregate includes, for example, foamed perlite, foamed clay, cement solidified with sand and wood waste, and the like. The size per weight of the lightweight aggregate is about 2 mm to 3 mm or 10 mm. Moreover, as inorganic material powder, there are natural sand, sand of limestone, coal ash, ash of various organic substances and the like. As this coal ash, there are bottom ash and fly ash, and as ash of various organic substances, rice husk ash, ash burned with corn and sugarcane pomace, ash burned with eucalyptus wood which is a raw material of paper It is desirable that the bulk specific gravity be smaller than that of natural sand in order to make the lightweight concrete panel 12 lighter.

The lightweight concrete panel 12 has, as its dimensions, a width and a thickness determined by the size of the extrusion molding apparatus 10, and a length determined in the extrusion direction in which the extrusion molding apparatus 10 extrudes a raw material mixture obtained by mixing the above materials for the lightweight concrete panel 12. And. The width is set, for example, in the range of 200 mm to 1000 mm in consideration of the difficulty of transportation and the strength during handling, and the width is generally 600 mm, 450 mm, 900 mm, and the like. The thickness is determined, for example, in the range of 50 mm to 200 mm (preferably 60 mm or more) in consideration of mechanical strength, heat insulation and the like, and is generally 90 mm. Furthermore, in consideration of the difficulty of transportation, the strength during handling, and the like, the length obtained by forming the extrusion molding apparatus 10 into a moldable length (for example, 140 m continuously) is cut at an arbitrary position. For example, 3 m, 4.5 m, etc. are common.

The lightweight concrete panel 12 has a surface 14 mainly exposed as an outer wall of a building, a back surface 16 opposite to the surface 14, and four side surfaces 18, 20, 22, 24. The thickness of the lightweight concrete panel 12 is defined as the distance between the front surface 14 and the back surface 16. The length of the lightweight concrete panel 12 is defined as the distance between the side 18 and the side 20. The width of the lightweight concrete panel 12 is defined as the distance between the side surface 22 and the side surface 24.

The lightweight concrete panel 12 has a circular hollow hole 26. The hollow hole 26 is open to the side surface 18 and the side surface 20, and extends in a straight line so as to connect the two side surfaces 18 and 20. The hollow hole 26 extends parallel to the front surface 14 and the back surface 16 and the side surfaces 22 and 24. At least one hollow hole 26 is provided. When a plurality of hollow holes 26 are provided, they are arranged in a line in the width direction between the side surface 22 and the side surface 24.

Each hollow hole 26 has a predetermined radius. The plurality of hollow holes 26 are formed such that the distance between the axes of two adjacent hollow holes 26 is greater than twice the radius of the hollow 26 and the portion between the two hollow holes 26 Are formed so as to have a width that does not crush as a beam. Note that the number of hollow holes 26 may be adjusted to the size of one lightweight concrete panel 12, and at least one hollow hole 26 may be provided in one lightweight concrete panel 12.

The side surface 22 is provided with a projecting protrusion 28. Further, the side surface 24 is provided with a recessed groove 30. The protrusion 28 and the groove 30 extend in the length direction linearly from the side surface 18 side to the side surface 20 side, respectively. At least one protrusion 28 and at least one groove 30 are provided. The shape of the projection 28 and the shape of the groove 30 correspond to each other. For this reason, it is possible to connect two light weight concrete panels 12 adjacent to each other by engagement of the protrusion 28 on one side and the groove 30 on the other side.

Unevenness is not formed on the back surface 16. That is, the shape of the back surface 16 of the lightweight concrete panel 12 is substantially flat. On the other hand, a groove 32 is formed on the surface 14 and an unevenness is provided. That is, the shape of the surface 14 of the lightweight concrete panel 12 is a surface on which the concavities and convexities having the grooves 32 are formed. The groove 32 extends linearly in the length direction from the side surface 18 side to the side surface 20 side. The cross-sectional shape of the groove 32 is the same regardless of the position in the longitudinal direction. The depth of the groove 32 is determined, for example, in the range of 0.5 mm to 7.0 mm, preferably in the range of 3 mm to 5 mm.

The grooves 32 are provided to facilitate holding of an application such as mortar (not shown) applied to the surface 14 of the lightweight concrete panel 12. A plurality of grooves 32 are provided on the surface 14. The plurality of grooves 32 are arranged side by side in the width direction, and are arranged at substantially equal intervals. The number of grooves 32 may be such that the mortar can be firmly held on the surface 14 of the lightweight concrete panel 12 without cracks, for example, one or more may be provided between 10 cm, and two or more. Is preferred.

The distance between the two grooves 32 aligned in the width direction (that is, the distance between the centers of the two grooves 32) may be set to the distance at which the coated material such as mortar is most easily held. For example, it is determined in the range of 15 mm to 30 mm, preferably about 20 mm. Further, the width of the groove 32 itself is determined, for example, in the range of 2 mm to 10 mm, preferably in the range of 4 mm to 5 mm. It is preferable that the distance between the two grooves 32 be larger than the width of the grooves 32 itself in order to suppress an increase in the amount of a coating such as mortar on the surface 14 of the lightweight concrete panel 12.

In order to fix the application on the surface 14 of the lightweight concrete panel 12, it is preferable that the corner on the inlet side of the groove 32 be formed at an acute angle. However, if the angle of the corner portion is too acute, the mold for forming the groove 32 is apt to be worn, and if the lightweight aggregate is as large as about 10 mm in diameter, it is formed into an acute shape according to the mold. It disappears. Therefore, the cross-sectional shape of the groove 32 is preferably rectangular.

The extrusion molding apparatus 10 is equipped with the flame | frame 40 holding each member of the extrusion molding apparatus 10, as shown to FIG. 2 and FIG. The extrusion apparatus 10 also includes a screw conveyor 42 rotatably held by the frame 40. The screw conveyor 42 is a member that forms the hollow hole 26 of the lightweight concrete panel 12 and is a member that extends in a bar shape. The screw conveyor 42 is attached to the frame 40 such that the axis extends in the horizontal direction (X direction shown in FIGS. 2 and 3).

The screw conveyors 42 are provided in a number corresponding to the number of the hollow holes 26 in the width direction of the lightweight concrete panel 12. Each screw conveyor 42 is attached to the frame 40 in a positional relationship corresponding to the hollow hole 26 of the lightweight concrete panel 12. All the screw conveyors 42 are arranged side by side in a direction (Y direction shown in FIGS. 2 and 3) orthogonal to the X direction in which the axis extends. The distance between the axial centers of two screw conveyors 42 adjacent to each other in the Y direction substantially corresponds to the distance between the axial centers of two hollow holes 26 adjacent to each other in the light-weight concrete panel 12. Each screw conveyor 42 rotates about an axis extending in the X direction by the operation of the motor. The screw conveyors 42 may all rotate in the same rotational direction, but may rotate in opposite directions.

Each screw conveyor 42 has a screw portion 44 and a round bar portion 46. The screw portion 44 has a blade 48 formed in a helical shape around an axis extending in the X direction. The blade 48 has a function of pushing the material mixture for the lightweight concrete panel 12 supplied in the frame 40 in the X direction as the screw conveyor 42 rotates.

The round bar portion 46 has a predetermined outer diameter around an axis extending in the X direction, and is formed in a cylindrical shape. The round bar portion 46 is formed so that its outer diameter is smaller than the outermost diameter of the screw portion 44. The outer diameter of the round bar portion 46 corresponds to the diameter of the hollow hole 26 of the lightweight concrete panel 12. The round bar portion 46 is provided on the tip side of the screw conveyor 42. The round bar portion 46 extends in the X direction from the end of the screw portion 44 (specifically, the downstream end on the flow path through which the material mixture for the lightweight concrete panel 12 flows in the forming process), A screw conveyor 42 is configured integrally with the screw portion 44.

The extrusion apparatus 10 also comprises a hopper 50 attached to the frame 40. The hopper 50 is disposed above the screw conveyor 42 (specifically, the screw portion 44 thereof). The hopper 50 is a unit for supplying the material mixture for the lightweight concrete panel 12 onto the screw conveyor 42 (specifically, the screw portion 44 thereof) in the frame 40, and has a supply port communicating with the inside of the frame 40. doing. The size of the hopper 50 may be any size necessary to form the lightweight concrete panel 12 from the raw material mixture. The raw material mixture is supplied from the hopper 50 toward the screw portion 44 of the screw conveyor 42 in the frame 40.

The extrusion molding apparatus 10 also includes a flow path 52 through which the material mixture supplied from the hopper 50 flows. The flow path 52 is surrounded by a top plate 54 attached to the frame 40, two side plates 56 and 58 attached to the frame 40, and a horizontal floor 60 on which the extrusion molding apparatus 10 is installed. It is a thing. The lower surface of the formed body during the forming process of forming the lightweight concrete panel 12 from the material mixture is supported by the floor surface 60. The floor 60 is made of, for example, concrete or an iron plate.

As shown in FIGS. 2, 3, 4 and 5, the top plate 54 is provided with a vibrating plate 62 for vibrating the material mixture flowing through the flow path 52, and the vertical direction of the molded body in the molding process (ie, And a thickness regulating plate 64 as a mold for defining the thickness in the Z direction). The diaphragm 62 and the thickness defining plate 64 are continuous in that order from the upstream side to the downstream side through which the material mixture flows during the molding process, and are arranged adjacent to each other in the X direction. The vibrating plate 62 and the thickness determining plate 64 are provided above the screw conveyor 42.

The floor surface 60 described above is provided below the screw conveyor 42, and faces the diaphragm 62 and the thickness determining plate 64 with the screw conveyor 42 interposed therebetween. The diaphragm 62 and the floor 60 are disposed such that the inner surfaces are separated by a distance corresponding to the desired thickness of the lightweight concrete panel 12. Similarly, the thickness defining plate 64 and the floor surface 60 are disposed such that the inner surfaces thereof are separated by a distance corresponding to the desired thickness of the lightweight concrete panel 12.

The diaphragm 62 is provided on the flow path 52 downstream of the hopper 50, and is held by the frame 40 so as to vibrate in the Z direction. The diaphragm 62 vibrates in the Z direction by the operation of the motor 66 attached to the frame 40. The vibrating plate 62 acts to thixotropy the material mixture to increase its fluidity by applying vibration to the material mixture flowing through the flow path 52, and at the same time to form the upper surface of the panel-like molded body to a certain extent. Have. The diaphragm 62 has a length in the width direction corresponding to the width of the light weight concrete panel 12 in the Y direction, and a flow sufficient to form a panel-like formed body uniformly filled by vibration addition to the material mixture in the X direction. And a directional length.

The thickness regulating plate 64 is provided downstream of the diaphragm 62 on the flow path 52, and unlike the diaphragm 62, is attached and fixed to a counter weight 68 described later so that vibration in the Z direction can not be performed. It is done. The thickness regulating plate 64 is a plate for regulating the thickness in the Z direction of the panel in the process of circulating the panel-like compact molded by the diaphragm 62 in the X direction with respect to the frame 40. The thickness defining plate 64 has a width direction length corresponding to the width of the light weight concrete panel 12 in the Y direction, and a thickness of a panel-like formed body formed by the diaphragm 62 in the circulation process in the X direction. And a flow direction length sufficient to maintain the desired thickness.

Above the thickness regulating plate 64, a counterweight 68 is disposed. The counterweight 68 is attached to the frame 40. The counterweight 68 is a counterweight which receives a reaction force input from the molded body through the thickness defining plate 64 when the thickness of the shaped body is defined by the thickness defining plate 64.

The side plates 56, 58 face each other in the Y direction across all the screw conveyors 42, and are arranged such that their inner surfaces are separated by a distance corresponding to the desired width of the lightweight concrete panel 12. The side plates 56 and 58 are provided on both sides of the screw conveyor 42. Specifically, the two side plates 56, 58 are provided outside the two screw conveyors 42 located at both ends in the Y direction among all the screw conveyors 42 aligned in the Y direction.

The side plates 56 and 58 are width defining plates that define the width in the Y direction of the material mixture or the molded body in the process of the material mixture or the panel-like molded body flowing in the X direction with respect to the frame 40. The side plates 56, 58 are each sufficient to form the lightweight concrete panel 12 from the material mixture supplied from the hopper 50 in the thickness direction corresponding to the thickness of the lightweight concrete panel 12 in the Z direction and in the X direction. And a flow direction length.

The side plate 56 is provided with a groove 70. The groove 70 is a recessed portion recessed on the inner surface (specifically, the surface facing the side) of the side plate 56 in contact with the raw material mixture supplied from the hopper 50. The groove 70 extends in the X direction from the upstream side to the downstream side of the flow path 52. The shape of the groove 70 corresponds to the shape of the projection 28 of the side surface 22 of the lightweight concrete panel 12.

Further, the side plate 58 is provided with a protrusion 72. The protrusion 72 is a portion that protrudes laterally on the inner surface (specifically, the surface facing the side) in contact with the raw material mixture supplied from the hopper 50 of the side surface plate 58. The protrusion 72 extends in the X direction from the upstream side to the downstream side of the flow path 52. The shape of the protrusion 72 corresponds to the shape of the groove 30 of the side surface 24 of the lightweight concrete panel 12.

The screw portion 44 of the screw conveyor 42 is between the upstream end and the downstream end of the diaphragm 62 from the position (specifically, the position immediately below) of the hopper 50 in the X direction which is the horizontal direction. (E.g., approximately at an intermediate position thereof). Further, in the X direction which is the horizontal direction, the round bar portion 46 is positioned between the upstream end of the thickness defining plate 64 and the downstream end from the position of the downstream end of the screw portion 44 ( For example, it extends approximately to the middle position).

The diaphragm 62 has a protrusion 74. The protrusion 74 is a portion protruding downward on the inner surface (specifically, the surface facing downward) of the diaphragm 62 in contact with the raw material mixture supplied from the hopper 50. The ridges 74 extend linearly in the X direction from the upstream side to the downstream side of the flow path 52. The shape of the ridges 74 corresponds to the shape of the grooves 32 of the surface 14 of the lightweight concrete panel 12. The cross-sectional shape of the protrusion 74 is, for example, rectangular and has the same size (ie, the same height) in the extending X direction. The size (ie, height) of the protrusion 74 is set, for example, in the range of 0.5 mm to 7.0 mm, preferably in the range of 3 mm to 5 mm.

A plurality of protrusions 74 are provided on the diaphragm 62. The plurality of protrusions 74 are arranged in the Y direction orthogonal to the X direction which is the extending direction of the protrusions 74, and are arranged at substantially equal intervals. The number of protrusions 74 may be, for example, one or more provided between 10 cm, and is preferably two or more.

The distance between two ridges 74 adjacent to each other in the Y direction (that is, the distance between the centers of the two ridges 74) is the distance between two grooves 32 adjacent to each other in the width direction of the surface 14 of the lightweight concrete panel 12. For example, it is determined in the range of 15 mm to 100 mm, preferably about 20 mm to 30 mm. The width of the protrusion 74 itself is determined, for example, in the range of 2 mm to 10 mm, preferably in the range of 4 mm to 5 mm. It is preferable that the distance between the two ridges 74 be larger than the width of the ridge 74 itself in order to suppress an increase in the amount of the coated material on the surface 14 of the lightweight concrete panel 12.

The thickness regulating plate 64 has a protrusion 76. The ridges 76 are portions of the thickness defining plate 64 that project downward on the inner surface (specifically, the surface facing downward) in contact with the material mixture supplied from the hopper 50. The ridges 76 extend in the X direction from the upstream side to the downstream side of the flow path 52. The shape of the ridges 76 corresponds to the shape of the grooves 32 of the surface 14 of the lightweight concrete panel 12. The protrusions 76 are provided on the thickness defining plate 64 by the same number as the number of the protrusions 74 of the diaphragm 62. The plurality of protrusions 76 are arranged in the Y direction orthogonal to the X direction which is the extending direction of the protrusions 76, and are arranged at substantially equal intervals. The number of protrusions 76 may be, for example, one or more provided between 10 cm, and is preferably two or more.

The distance between the two ridges 76 adjacent to each other in the Y direction corresponds to the distance between the two grooves 32 adjacent to each other in the width direction of the surface 14 of the light-weight concrete panel 12, and is determined in the range of 15 mm to 100 mm, for example. And preferably about 20 mm to 30 mm. The width of the protrusion 76 itself is determined, for example, in the range of 2 mm to 10 mm, preferably in the range of 4 mm to 5 mm. It is preferable that the distance between the two ridges 76 be larger than the width of the ridge 76 itself in order to suppress an increase in the amount of application to the surface 14 of the lightweight concrete panel 12. Each protrusion 76 is continuous with the corresponding protrusion 74 of the diaphragm 62, and the protrusion 74
And one in a row in the X direction to make one with it.

Next, the operation of the extrusion molding apparatus 10 will be described.

In order to form the light weight concrete panel 12 from a material mixture comprising materials such as cement, light weight aggregate, sand and water, first, the material mixture is directed from the hopper 50 to the screw portion 44 of the screw conveyor 42 in the frame 40. Supplied. This material mixture has thixotropic properties. The supply of the material mixture from the hopper 50 is performed continuously in time. Note that this supply may be performed in an amount necessary to form one lightweight concrete panel 12 having a desired length, and a plurality of lightweight concrete panels 12 may be formed. Only the amount necessary for the

The thixotropic raw material mixture supplied from the hopper 50 is pushed out in the X direction by the blades 48 of the screw portion 44 of the screw conveyor 42 which rotates and flows from the upstream side toward the downstream side of the flow path 52. First, the material mixture that has flowed is deposited on the floor surface 60 (in particular, directly below the screw conveyor 42 or downstream of the screw conveyor 42). After the start of the deposition, if the supply of the material mixture is continued, the friction between the deposited material mixture and the inner surface of the flow passage 52 prevents the material mixture from being pushed downstream while the material mixture is filled in the flow passage 52 To go. As this filling progresses, the raw material mixture in the flow path 52 is pressurized in the X direction and gradually pushed downstream with respect to the frame 40.

When the material mixture is filled in the flow passage 52 until it contacts the diaphragm 62 and closes the flow passage 52, the vibration of the material mixture in the Z direction by the operation of the motor 66 above the screw conveyor 42 is thereafter performed. A vibration is applied by 62. When vibration is applied to the stock mixture, the stock mixture is stressed and fluidized. If the material mixture is fluidized, the material mixture can be pushed into the flow path 52 to the void of the details and the material mixture itself as compared to when the flowability is low. For this reason, the raw material mixture is uniformly filled and densified in the flow path 52 when vibration is applied from the state of low fluidity.

The material mixture has its flowability enhanced by the vibration of the vibration plate 62 as described above and is filled in the flow path 52, and then its flowability gradually decreases according to the extrusion to the downstream side by the screw conveyor 42 Become. When the material mixture passes through the downstream end of the diaphragm 62 and reaches the tip end of the round bar portion 46 of the screw conveyor 42, it becomes a molded body having a somewhat low fluidity and the thickness regulating plate 64. When it reaches the downstream end of the mold, it becomes a molded body which has completely lost its fluidity.

When the processing from the supply of such a thixotropic material mixture to the formation of the molded body is carried out, the top plate 54 (specifically, the diaphragm 62 and the thickness defining plate 64), the side plates 56, 58 and the floor A panel having an outer shape corresponding to the cross-sectional shape of the flow path 52 surrounded by the surface 60, and a hollow hole 26 corresponding to the outer shape of the screw conveyor 42 (specifically, the round bar portion 46) A molded body is molded. During this molding, the thickness defining plate 64 and the floor surface 60 define the thickness in the Z direction of the panel-like shaped body, and the two side plates 56 and 58 define the panel-like shaped body in the Y direction. The width is defined. Accordingly, it is possible to realize the formation of a block-like lightweight concrete panel 12 having hollow holes 26 from a thixotropic material mixture, and to make the lightweight concrete panel 12 have a desired thickness and width. Can.

The lightweight concrete panel 12 formed in the frame 40 is gradually pushed downstream with respect to the frame 40 by the rotation operation of the screw conveyor 42 and discharged from the downstream end of the thickness defining plate 64 to the outside of the frame 40. The light weight concrete panel 12 which has been molded or discharged out of the frame 40 is cut to an arbitrary length and manufactured to a desired size.

The light weight concrete panel 12 is fixed to the floor surface 60 by friction with the floor surface 60 by extrusion with the screw conveyor 42, and the discharge of the light weight concrete panel 12 to the outside of the frame 40 is installed and fixed on the floor surface 60. Alternatively, the frame 40 may be moved relative to the floor 60 (to the left in FIG. 2). Alternatively, the lightweight concrete panel 12 may move relative to the frame 40 installed and fixed to the floor 60 (to the right in FIG. 2). In this case, the lightweight concrete panel 12 is discharged out of the frame 40 while being supported by a belt conveyor or the like moving at the same speed as the extrusion speed.

Further, in the present embodiment, the screw portion 44 of the screw conveyor 42 is the upstream end portion and the downstream portion of the diaphragm 62 from the position (specifically, the position immediately below) of the hopper 50 in the X direction which is the horizontal direction. It extends to a position between the side ends (e.g., approximately at an intermediate position thereof). Unlike the structure in which only the upstream end of the diaphragm 62 extends as far as the screw 44 extends downstream of the upstream end of the diaphragm 62, the blade of the screw 44 is different. The extrusion of the material mixture in the X direction by 48 and the vibration in the Z direction by the diaphragm 62 are performed at overlapping positions on the flow path 52. That is, the material mixture extruded by the blades 48 of the screw portion 44 immediately fluidizes by the vibration of the diaphragm 62 or the material mixture fluidized by the vibration of the diaphragm 62 is immediately extruded by the blades 48. For this reason, according to the present embodiment, it is possible to ensure that the material mixture is densified to uniformly fill the molding of the panel-like molded body.

On the other hand, in the structure in which the screw portion 44 extends to the downstream end of the diaphragm 62 or further to the downstream side of the end, the material mixture in which the thixotropic property is lost is the blade 48 of the screw 44 and The rotation of the screw portion 44 is impeded by being pinched between the thickness defining plate 64 and the protrusion 76. On the other hand, as long as the screw portion 44 does not reach the downstream end of the diaphragm 62 as in the present embodiment, it extends only to the upstream side (for example, approximately the intermediate position thereof) than the end thereof. It is suppressed that the raw material mixture in which the thixotropic nature is lost is caught between the blade 48 of the screw portion 44 and the ridge 76 of the thickness defining plate 64, and the rotation inhibition of the screw portion 44 is reduced. For this reason, according to the present embodiment, when the screw portion 44 of the screw conveyor 42 pushes out the material mixture in the X direction, it is not necessary to apply a very large pressing force, and it is possible to prevent wasteful energy consumption. be able to.

Further, the round bar portion 46 of the screw conveyor 42 has the upstream end and the downstream end of the thickness defining plate 64 from the position of the downstream end of the screw portion 44 in the X direction which is the horizontal direction. Extend to a position between (e.g., approximately at an intermediate position thereof). If the round bar portion 46 extends further to the downstream side than the upstream end of the thickness determining plate 64, the diaphragm is different from the structure in which only the upstream end of the thickness determining plate 64 is extended. It is avoided that the molded body in which the groove 32 is formed by the ridges 62 and the hollow hole 26 is formed by the round bar portion 46 is easily broken or deformed before losing its fluidity. For this reason, according to this embodiment, it can prevent that shaping | molding of a panel-like molded object accompanies a chipping or a deformation | transformation.

Also, if the round bar portion 46 extends only to the upstream side of the end not reaching the downstream end of the thickness defining plate 64, it extends to the end or to the downstream side of the end As compared with the existing structure, an increase in the area in which the round bar portion 46 and the molded body to be formed are in contact and an increase in the frictional force is avoided. For this reason, according to the present embodiment, when the screw portion 44 of the screw conveyor 42 pushes out the formed body formed from the material mixture in the X direction, it is not necessary to give a very large pressing force, and wasting energy. It is possible to prevent consumption.

Furthermore, in the present embodiment, the diaphragm 62 and the thickness defining plate 64, which are the upper surface plate 54, contact in the process of pushing the raw material mixture in the X direction in the flow passage 52 have an inner surface provided with the ridges 74 and 76. doing. The respective ridges 74 of the diaphragm 62 and the respective ridges 76 of the thickness defining plate 64 linearly extend in the X direction, and are continuous in the X direction so as to be integral with each other.

In such a structure, in the process of extruding the material mixture to the downstream side, the material mixture is pushed toward the inner surface of the diaphragm 62 having the ridges 74 so that the flowability is enhanced while the flowability is enhanced. Be fitted. In this case, grooves 32 corresponding to the ridges 74 are formed on the surface of the material mixture in contact with the diaphragm 62. Thereafter, the material mixture in which the groove 32 is formed is pressed onto the inner surface of the thickness defining plate 64 having the ridges 76 continuous with the ridges 74 described above, thereby being mold-fitted to the ridges 76. . In this case, the groove 32 of the raw material mixture is formed in a shape corresponding to the protrusion 76 in accordance with the one formed by the protrusion 74.

For this reason, the groove 32 can be formed in the surface 14 of the panel-like formed body in the process of extruding the raw material mixture, and the surface 14 can be a surface on which the concavo-convex having the groove 32 is formed. Therefore, according to the present embodiment, the surface 14 of the lightweight concrete panel 12 formed from the raw material mixture can be made to be easy to hold an application such as mortar.

In addition, the ridge 14 for forming the groove 32 in the thickness defining plate 64 that defines the thickness of the molded body as a mold, while the surface 14 of the lightweight concrete panel 12 is the surface on which the unevenness having the groove 32 is formed. Not only are the projections 76 provided, but also projections on the upstream side with respect to the thickness defining plate 64 for forming grooves 32 on the inner surface of the diaphragm 62 which vibrates and enhances the flowability of the raw material mixture. Article 74 is provided.

In such a structure, the material mixture whose fluidity is enhanced by the vibration of the diaphragm 62 is pushed to the roots of the both side walls of the ridges 74 of the diaphragm 62 while the ridges 74 of the diaphragm 62 and the diaphragm The grooves 32 can be formed on the surface of the panel-like formed body in combination with the ridges 76 of the thickness defining plate 64 adjacent to the downstream side with respect to 62. For this reason, according to the present embodiment, when forming a panel-like molded body from the material mixture with low fluidity supplied from the hopper 50, the formation of the groove 32 is performed only by the ridges 76 of the thickness defining plate 64. The groove 32 formed on the surface of the panel-like molded body can be made to have high shape accuracy as compared with the configuration.

Therefore, according to the extrusion molding apparatus 10 of the present embodiment, even if the material mixture supplied from the hopper 50 has a low material cost and a low flowability, panel-like molding formed from a thixotropic material mixture Grooves 32 with high shape accuracy can be reliably formed on the surface of the body.

Even if the ridges 74 are provided on the inner surface of the diaphragm 62 as in the present embodiment, the function of fluidization of the material mixture due to the vibration of the diaphragm 62 does not deteriorate. For this reason, according to the present embodiment, the shape accuracy of the grooves 32 on the surface of the molded body formed from the thixotropic material mixture is reduced due to the presence of the ridges 74 provided on the diaphragm 62. It is prevented.

By the way, in the above embodiment, the side plates 56 and 58 protrude in the “width defining plate” described in the claims, and the protrusions 74 project in the “first protrusion” described in the claims. These correspond respectively to the “second protrusion” described in Article 76 in the scope of claims.

The present invention is not limited to the above-described embodiment and modifications, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the horizontal floor surface 60 on which the extrusion molding apparatus 10 is installed is used as the lower surface of the flow path 52 through which the raw material mixture flows. However, the present invention is not limited to this, and a lower surface plate as a mold attached to the frame 40 may be used as the lower surface of the flow path 52. The lower surface plate is a guide plate provided below the screw conveyor 42 so as to be opposed to the diaphragm 62 and the thickness determining plate 64, and the lower surface plate is a formed body in the forming process in which the lightweight concrete panel 12 is formed from the material mixture. It supports the lower surface. Also in this modification, the same effect as the above embodiment can be obtained.

Moreover, in said embodiment, the cross-sectional shape of the groove 32 of the surface 14 of the light-weight concrete panel 12 shall be the same irrespective of a length direction, and the cross-sectional shape of the protrusion 74 is in the X direction to extend. It is assumed that they have the same size (that is, the same height) and the same size as the cross-sectional shape of the ridge 76. However, the present invention is not limited to this, and as shown in FIG. 6, the sectional shape of the ridges 74 may be smaller toward the upstream side and larger (height) toward the downstream side. In this case, the cross-sectional shape of the protrusion 74 is made closer to the normal size (specifically, the size of the cross-sectional shape of the protrusion 76) as the size is closer to the downstream side, and the normal shape at the most downstream end It should be matched to the size of. According to this modification, the protrusion 74 of the diaphragm 62 is pushed in the process of extruding the material mixture from the hopper 50 to the downstream side as compared with the cross-sectional shape of the protrusion 74 having the same size in the X direction. The pressing force from the raw material mixture to be applied can be suppressed, and the load acting on the extrusion molding apparatus 10 at the beginning of the formation of the groove 32 in the raw material mixture can be reduced.

In the above embodiment, the screw conveyor 42 rotates the screw portion 44 and the round bar portion 46 integrally. However, the present invention is not limited to this, and as shown in FIG. 7, while the screw portion 44 rotates, the round bar portion 46 is made non-rotatable, and the round bar portion 46 against the screw portion 44. It may be held by the fixed shaft 90 of the screw portion 44 so as to be relatively rotatable. According to this modification, when the screw portion 44 rotates in the process of pushing out the material mixture in the X direction, the rotation resistance of the round bar portion 46 is avoided, so the rotational power of the screw portion 44 is reduced. be able to.

DESCRIPTION OF REFERENCE NUMERALS 10 extrusion forming apparatus 12 light weight concrete panel 14 surface 26 hollow hole 32 groove 40 frame 42 screw conveyor 46 screw portion 46 round bar portion 48 blade 50 hopper 56, 58 side plate 60 floor surface 62 diaphragm 64 thickness regulating plate 74, 76 Article 90 Fixed shaft

Claims (8)

Screw rotatably held in a frame and having a screw portion spirally formed around a horizontally extending shaft and a cylindrical round bar portion extending from the downstream end of the screw portion A conveyer, a hopper for supplying a material mixture for light weight concrete panels mounted on the frame above the screw conveyor onto the screw portion, and provided downstream of the hopper A diaphragm for applying vibration to the raw material mixture to form an upper surface of the panel-like molded product, a thickness regulating plate provided downstream of the diaphragm for defining the thickness of the molded product, and And a width defining plate provided on both lateral sides of the screw conveyor for defining the width of the compact, and the material mixture is rotated by the rotation operation of the screw conveyor. A extruder lightweight concrete panel the molding to the panel-like vibration plate and said thickness regulating plate and the width defining plate while extruding the downstream side,
The diaphragm has a first protrusion extending from the upstream side to the downstream side which protrudes on the inner surface in contact with the material mixture, and
The thickness defining plate has a second ridge continuous from the first ridge and extending from the upstream side to the downstream side projecting from the inner surface in contact with the raw material mixture. Extrusion equipment. The diaphragm has a plurality of the first protrusions arranged in the direction orthogonal to the extending direction of the first protrusions.
The thickness regulating plate is characterized by having the same number of the second protrusions as the number of the first protrusions arranged in the direction orthogonal to the extending direction of the second protrusions. The extrusion molding apparatus for lightweight concrete panels according to claim 1. The screw portion extends from the position of the hopper in the horizontal direction to a position between the upstream end and the downstream end of the diaphragm.
The round bar portion extends from the position of the downstream end of the screw portion in the horizontal direction to the position between the upstream end and the downstream end of the thickness regulating plate. The extrusion molding apparatus of the light weight concrete panel of Claim 1 or 2. The diaphragm and the thickness determining plate are provided above the screw conveyor,
The extrusion molding apparatus for a lightweight concrete panel according to any one of claims 1 to 3, wherein the lower surface of the molded body is supported by a floor surface facing the diaphragm and the thickness determining plate below the screw conveyor. The diaphragm and the thickness determining plate are provided above the screw conveyor,
The lower surface plate which supports the lower surface of the said molded object provided in the downward direction of the said screw conveyor facing the said diaphragm and the said thickness prescription | regulation board is provided with any one of the Claims 1 thru | or 3 characterized by the above-mentioned. Lightweight concrete panel extrusion equipment. The light-weight concrete panel according to any one of claims 1 to 5, wherein the cross-sectional shape of the first protrusion is smaller toward the upstream side and closer to a regular size toward the downstream side. Extrusion equipment. The extrusion molding apparatus for a lightweight concrete panel according to any one of claims 1 to 6, wherein the round bar portion is held so as to be relatively rotatable with respect to the screw portion. A lightweight concrete panel having a groove formed on a surface, which is manufactured by the extrusion molding apparatus for lightweight concrete panel according to any one of claims 1 to 7.

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