JP5322155B2 - Manufacturing method of foam perlite board - Google Patents

Description

  The present invention relates to a plate mainly composed of bubble particles and a method for producing the plate.

Conventionally, a plate-like material mainly composed of bubble particles such as pearlite has been proposed (see Patent Documents 1 and 2). Since this plate-like material is mainly composed of bubble particles, it is porous and has the characteristics of excellent sound absorption, heat insulation, moisture retention and the like.
JP 2004-69060 A JP 2008-50934 A

  However, for plate-like materials mainly composed of bubble particles, various uses have already been created by users and manufacturers, and it is thought that they will continue to be created in the future. Therefore, in order to respond quickly to new applications that will be created in the future, the plate-like material mainly composed of bubble particles will have a different structure while maintaining the porosity mainly composed of bubble particles. It was necessary to provide.

  Then, an object of this invention is to provide the manufacturing method of the bubble particle board which has a new structure, and this bubble particle plate.

  According to the present invention, the above problem is solved by the following means.

A first aspect of the present invention is a mixture preparation step of preparing a mixture consisting of foamed perlite 60 wt% to 90 wt% and the binder 10 wt% to 40 wt% or less, molding device and the mixture made with the mixture preparation step was pressed into a plate shape while vibrating at a molding step of preparing a plate-shaped molded body shapeless is prevented by the difference of the volume density, the pre-SL manufactured by the molding process a plate-shaped body have a, a firing step of firing after removal from the molding apparatus, the plate-shaped body, the surface layer is volume density outside the thickness ratio 1.25% is more than 200% of the volume density of the foamed perlite And a back layer, and a main body layer having a volume density of 120% or more and less than 200% or 100% or more and less than 120% of the volume density of the foamed pearlite inside the thickness ratio of 1.25%. make A method for producing a foam pearlite plate.

According to a second aspect of the present invention, the foamed pearlite plate according to the first aspect is characterized in that the plate-like molded body produced in the molding step is dehydrated after being taken out of the molding apparatus and before the firing. It is a manufacturing method .

(Bubble particle plate, bubble particle, binder)
“Bubble particle plate” refers to a plate-like body mainly composed of bubble particles, and “based on bubble particle” means that the weight percentage of the bubble particles relative to the total weight of the plate-like body is 60 or more. Say. “Bubble particles” refers to a granular material having bubbles, and “binder” refers to a substance sintered together with the bubble particles.

(Surface layer)
The surface layer has a thickness ratio of 1.25% with respect to the thickness of the bubble particle plate. The bubble plate has a width, a depth, and a thickness. The thickness is 1% to 40% of the width and 1% to 40% of the depth.

(Completely destroyed, partially destroyed, undestructed)
“The bubble particles are completely destroyed” means that the volume density is 200% or more of the volume density of the bubble particles. Further, “the bubble particles are partially broken” means that the volume density is 120% or more and less than 200% of the volume density of the bubble particles. “The bubble particles are indestructible” means that the volume density is 100% or more and less than 120% of the volume density of the bubble particles.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the bubble particle board which has a new structure, and this bubble particle plate can be provided.

  The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

[Bubble plate]
First, the bubble particle board which concerns on embodiment of this invention is demonstrated.

  FIG. 1 is a diagram schematically showing a bubble particle plate according to an embodiment of the present invention. As shown in FIG. 1, in the embodiment of the present invention, one parent cell granule plate 1 is cut along cutting lines L1 to L4, and one parent cell granule plate 1 to nine child cell granule plates 11 to 11 are cut. 19 is acquired. Both the parent bubble particle plate 1 and the child bubble particle plates 11 to 19 are examples of the “bubble particle plate” according to the present invention.

  The parent cell grain plate 1 is a sintered body in which 60% by weight or more and 90% by weight or less of bubble particles and 10% by weight or more and 40% by weight or less of a binder are sintered. Similarly, the small cell particle plates 11 to 19 are also sintered bodies in which 60% by weight to 90% by weight of the bubble particles and 10% by weight to 40% by weight of the binder are sintered.

  The present invention does not limit what is used as the bubble particles, but as the bubble particles, glass balloons, shirasu balloons, and silica balloons can be preferably used, and in particular, obsidian, pearlite, or rosinite. Foamed perlite obtained by crushing, firing and foaming can be desirably used.

  In the embodiment of the present invention, the material used as the binder is not limited at all. However, as the binder, sodium silicate, potassium silicate, sodium hydroxide (caustic soda), clay, water, or the like can be preferably used. .

  It is preferable to use an inorganic material for both the bubble particles and the binder because the bubble particle plate is produced as an inorganic material, and a bubble particle plate that is harmless to the environment can be produced.

  2A and 2B are views showing an AA cross section and a BB cross section in FIG. 1, FIG. 2A is a cross section taken along the line AA in FIG. 1, and FIG. 2B is a cross section taken along the line BB in FIG. Indicates.

  As shown in FIG. 2, the parent cell particle plate 1 has dimensions of width x, depth y, and thickness z. In addition, the parent cell particle plate 1 and the child cell particle plates 14 to 16 include a first region 20 and a second region 30.

  The first region 20 in the parent cell particle plate 1 is surrounded by the second region 30. On the other hand, the first region 20 in the child bubble particle plate 14 is surrounded by the second region 30 except for the right side surface, and the first region 20 in the child bubble particle plate 15 is the second region 30 except for both side surfaces. The first region 20 in the child bubble particle plate 16 is surrounded by the second region 30 except for the left side surface.

  The first region 20 in the parent cell particle plate 1 is an example of a “main body layer”. Moreover, the part drawn in the upper side in FIG. 2A among the 2nd area | regions 30 in the parent cell particle plate 1 is an example of the "surface layer" formed in the parent cell particle plate 1, FIG. The part drawn on the lower side in (a) is an example of a “back layer” formed on the parent cell particle plate 1.

  The 1st field 20 in child bubble grain plates 14-16 is an example of a "body layer." In addition, in the second region 30 in the child bubble granule plates 14 to 16, the portion drawn on the upper side in FIG. 2A is an example of a “surface layer” formed on the child bubble granule plates 14 to 16. Yes, the portion drawn on the lower side in FIG. 2A is an example of a “back surface layer” formed on the child bubble granule plates 14 to 16.

  FIG. 3 is a diagram for explaining in detail the cross section of the sub-bubble granule plate 15 shown in FIG. 2A. FIG. 3A shows the cross-section of the sub-bubble granule plate 15 shown in FIG. It is sectional drawing, (b)-(d) is an enlarged view of each area | region in the cross section of the child bubble particle board 15. As shown in FIG.

  As shown in FIG. 3A, a surface layer 40, a main body layer 50, and a back layer 60 are formed on the child bubble granule plate 15.

  As described above, the surface layer 40 formed on the child bubble particle plate 15 is constituted by a portion drawn on the upper side of the second region 30 in the child bubble particle plate 15 drawn in FIG. Is done.

  Moreover, the main body layer 50 formed in the child bubble granule 15 is comprised from the 1st area | region 20 in the child bubble granule 15 drawn by Fig.2 (a).

  Further, the back surface layer 60 formed on the child bubble particle plate 15 is constituted by a portion drawn on the lower side of the second region 30 in the child bubble particle plate 15 shown in FIG. .

    As shown in FIG. 3B, the surface layer 40 is composed of bubble particles 70 and a binder 90 that are completely destroyed. Further, as shown in FIG. 3C, the main body layer 50 is composed of bubble particles 80 and a binder 90 that are partially broken. Further, as shown in FIG. 3D, the back surface layer 60 is composed of bubble particles 70 and a binder 90 that are completely destroyed. For reference, an unbroken bubble particle 100 is schematically shown in FIG.

  The thickness ratio of the front surface layer and the back surface layer to the thickness z of the bubble particle plate is 1.25%.

  According to the parent cell particle plate 1 and the child cell particle plates 11 to 19 according to the embodiment of the present invention described above, it is possible to provide a cell particle plate having a new configuration.

  In addition, according to the parent cell granule plate 1 and the child cell granule plates 11 to 19 according to the embodiment of the present invention, the thickness ratio of the front surface layer 40 and the back surface layer 60 in which the cell particles are completely destroyed is Since the thickness is set to 1.25% with respect to the thickness z, the porosity is not greatly impaired.

[Method for producing bubble plate]
Next, the manufacturing method of the bubble particle board which concerns on embodiment of this invention is demonstrated.

  FIG. 4 is a flowchart schematically showing a method for manufacturing a bubble particle plate according to an embodiment of the present invention. As shown in FIG. 4, the above-described parent cell particle plate 1 and child cell particle plates 11 to 19 can be preferably manufactured by a method having the following steps.

(S1: Mixture preparation process)
First, the bubble particle 100 and the binder 90 are put into the mixer 110, the bubble particle 100 and the binder 90 are mixed, and the mixture 120 which consists of the bubble particle 100 and the binder 90 is produced. Here, the ratio of the bubble particle | grains 100 and the binder 90 in the mixture 120 is as follows.
(1) Bubble particles: 60% to 90% by weight (2) Binder: 10% to 40% by weight

(S2: Molding process)
Next, the mixture 120 produced in the mixture production step (S1) is put into the hopper 130, and the mixture 120 is pressure-molded into a plate shape while being vibrated by the mold-type molding apparatus 140 or the rolling-type molding apparatus 150.

<In the case of molding with the mold molding apparatus 140>
When molding with the mold molding apparatus 140, the mixture 120 charged in the hopper 130 is filled into the mold 142 attached to the vibration press 141, and the mold 142 is press-molded into a plate shape while vibrating.

  Therefore, the mixture 120 is pressure-molded while being vibrated with its front surface, back surface, and side surfaces in contact with the inner surface of the mold 142. As a result, the bubble particles existing near the front surface, the back surface, and the side surface of the mixture 120 are completely destroyed, and the bubble particles existing inside the mixture 120 are partially broken.

<When forming with the rolling forming apparatus 150>
In the case of forming with the rolling type forming apparatus 150, the mixture 120 put into the hopper 130 is supplied to the rolling portion composed of the rolling roller 151 and the plate 153 attached to the vibration press 141 while vibrating the plate 153. Press-mold into a plate. Although not shown, the rolling molding apparatus 150 also includes a plate 153 that contacts the side surface of the mixture 120.

  Therefore, the mixture 120 is pressure-molded while being vibrated with its front surface, back surface, and side surfaces in contact with the plate 153. As a result, the bubble particles existing near the front surface, the back surface, and the side surface of the mixture 120 are completely destroyed, and the bubble particles existing inside the mixture 120 are partially broken.

  In addition, even when it shape | molds with the die-type shaping | molding apparatus 140, and also when shape | molding with the rolling-type shaping | molding apparatus 150, the completely broken layer of the bubble grain formed in the surface and the back surface of the mixture 120 is with respect to the thickness z of a bubble grain board. Therefore, the degree of pressurization and the degree of vibration are adjusted to have a thickness ratio of 1.25%.

(S3: Dehydration process)
Next, the plate-shaped molded body 160 produced in the above-described molding process is heated by far-infrared irradiation from the far-infrared device 170, and the heated plate-shaped molded body 160 is further heated with hot air from the hot air device 180. The plate-shaped molded body 160 is dehydrated by exposure to water. Note that it is preferable to perform this dehydration step in a vacuum because the time required for dehydration can be shortened compared to the case of performing in the air.

(S4: Firing step)
Next, the plate-shaped molded body dehydrated in the above dehydration step is fired in the firing furnace 190. Thereby, the parent cell particle plate 1 is produced. In addition, the partial destruction of the bubble particles in the main body layer 50 also proceeds by firing. Further, the complete destruction of the bubble particles in the front surface layer 40 and the back surface layer 60 also proceeds by firing.

(S5: Cutting step)
Next, if necessary, the parent bubble granule plate 1 produced as described above is cut to produce child bubble granule plates 11 to 19.

  According to the manufacturing method of the bubble particle board which concerns on embodiment of this invention demonstrated above, the manufacturing method of the bubble particle board which has a new structure can be provided.

  Moreover, according to the manufacturing method of the bubble particle board which concerns on embodiment of this invention, shape loss of a plate-shaped bubble particle board can be prevented. This is presumably because the mixture of the bubble particles and the binder is vibrated when being pressure-molded.

  That is, when the mixture of the bubble particles and the binder is vibrated when being pressure-molded, in the plate-shaped molded body to be produced, a portion in which the bubble particles are partially broken is formed inside, This is considered to be due to the formation of portions where the bubble particles are completely broken on the front surface, back surface, and side surfaces.

  More specifically, in the plate-like molded body produced by pressure molding in the embodiment, the collapse of the shape is prevented by the catching between the half-broken bubble particles, and further, by the completely broken bubble particles It is thought to be blocked by the constructed wall.

  Thereby, it is thought that the plate-shaped molded object produced by the pressure molding in the embodiment is prevented from being deformed during the period from the pressure molding to the completion of firing.

  The water contained in the molded body is considered to be one of the causes that cause the molded body to lose its shape. However, according to the method for producing a bubble granule plate according to the embodiment of the present invention, dehydration is performed after the molding and before firing. Therefore, the plate-like bubble particle plate is further prevented from being deformed.

  In addition, in the manufacturing method of the bubble particle board which concerns on embodiment of this invention, since it is not necessary to perform baking, it can isolate | separate a formation process and a baking process. Therefore, according to the method for manufacturing a bubble granule plate according to the embodiment of the present invention, the conditions at the time of molding and the conditions at the time of firing can be made different. In particular, the conditions at the time of molding are not limited to the conditions at the time of firing. Therefore, it becomes possible to adjust the degree of breakage of bubble particles such as complete breakage, half breakage, and no breakage at the time of molding, and it becomes possible to produce bubble particle plates having various breakage levels.

  In the bubble particle plate according to the above-described embodiment, the bubble particles are partially broken in the main body layer. However, in the bubble particle plate according to the present invention, even if the bubble particles are not broken in the main body layer. Good.

  Further, in the bubble particle plate according to the above-described embodiment, the surface layer and the back surface layer in which the bubble particles are completely broken are formed on the bubble particle plate, but the back layer in which the bubble particles are completely broken is formed. The bubble particle plate which is not made is also included in the bubble particle plate according to the present invention. Moreover, the bubble particle board which has the site | part in which the bubble particle is completely destroyed on the side surface side is also contained in the bubble particle plate which concerns on this invention.

  Further, in the method for manufacturing the bubble particle plate according to the above-described embodiment, the main body layer in which the bubble particles are partially broken is formed in the plate-shaped molded body and the bubble particle plate. In the method of manufacturing a granule plate, even if the main body layer in which the bubble particles are unbreakable is formed on the plate-like molded body and the bubble particle plate by adjusting the degree of pressurization and the degree of vibration in the molding step. Good.

  Further, in the method for manufacturing the bubble particle plate according to the above-described embodiment, the surface layer and the back layer in which the bubble particles are completely broken are formed on the bubble particle plate. However, the present invention is limited to this embodiment. Is not to be done. The method for producing a bubble particle plate according to the present invention includes a form in which a surface layer in which bubble particles are completely broken is formed, but a back layer in which bubble particles are completely broken is not formed.

  According to the present invention, it is possible to provide a preferable core material, as well as a porous material that has a hardness on the surface and is difficult to collapse. Heat insulating material etc. installed in the

  Further, according to the present invention, a foam particle plate excellent in sound absorption, heat insulation, moisture retention, fire resistance, and the like is provided by the main body layer in which the foam particles are semi-broken or the main body layer in which the foam grains are not broken. On the other hand, the surface layer (in the embodiment, the front surface layer and the back surface layer) in which the air bubble particles are completely broken, the rain water and the paint are difficult to penetrate inside, and the air bubble plate excellent in waterproofness and paintability is provided. be able to.

[Specification method]
In the present invention, “a surface layer in which bubble particles are completely broken”, “a body layer in which bubble particles are partially broken”, “a body layer in which bubble particles are unbroken”, and “bubble particles are completely broken The “back layer” is specified as follows.

<Surface layer where bubble particles are completely destroyed>
The volume density of the layer assumed as the surface layer (assumed surface layer) is measured. Specifically, the assumed surface layer is removed from the bubble particle plate, and the volume density of the removed assumed surface layer is measured. Here, the assumed surface layer has a value obtained by multiplying the thickness of the bubble particle plate by a thickness ratio of 0.0125, starting from the surface of the bubble particle plate. In addition, the surface of a bubble particle board means one of the two surfaces perpendicular to the thickness direction.

  The volume density of the assumed surface layer is measured by dividing the weight of the assumed surface layer by the volume of the assumed surface layer. As the volume of the assumed surface layer, a value obtained by multiplying the width of the bubble particle plate, the depth of the bubble particle plate, and the thickness of the bubble particle plate by 0.0125 is used. In addition, as the weight of the assumed surface layer, the weight of the assumed surface layer itself removed or the weight difference between the bubble granule plates before and after removing the assumed surface layer is used.

  If the volume density of the assumed surface layer is 200% or more of the volume density of the bubble particles, the assumed surface layer is regarded as a “surface layer in which the bubble particles are completely destroyed” in the present invention.

<Back layer with completely broken bubble particles>
The volume density of the layer assumed as the back layer (assumed back layer) is measured. Specifically, the assumed back layer is removed from the bubble particle plate, and the volume density of the removed assumed back layer is measured. Here, the assumed back layer has a thickness obtained by multiplying the thickness z of the bubble particle plate by the thickness ratio 0.0125, starting from the back surface of the bubble particle plate. In addition, the back surface of a bubble particle board means the other of two surfaces perpendicular | vertical to the thickness direction.

  The volume density of the assumed back layer is measured by dividing the weight of the assumed back layer by the volume of the assumed back layer. As the volume of the assumed back layer, a value obtained by multiplying the width of the bubble particle plate, the depth of the bubble particle plate, and the thickness of the bubble particle plate by 0.0125 is used. Further, as the weight of the assumed back layer, the weight of the removed assumed back layer itself or the weight difference between the bubble particle plates before and after the assumed back layer is removed (the assumed surface layer has already been removed) is used.

  If the volume density of the assumed back layer is 200% or more of the volume density of the bubble particles, the assumed back layer is regarded as “a back layer in which the bubble particles are completely destroyed” in the present invention.

<Main body layer in which bubble particles are partially broken, and main body layer in which bubble particles are unbroken>
The volume density of a layer assumed as the main body layer (assumed main body layer) is measured. Specifically, the volume density of the bubble particle plate from which the assumed surface layer and the assumed back layer are removed is measured.

  The volume density of the assumed body layer is measured by dividing the weight of the assumed body layer by the volume of the assumed body layer. As the volume of the assumed main body layer, a value obtained by multiplying the width of the bubble particle plate, the depth of the bubble particle plate, and the thickness of the bubble particle plate by (1-2 × 0.0125) is used. Further, the weight of the assumed main body layer is the weight of the assumed main body layer itself, that is, the weight of the bubble particle plate from which the assumed surface layer and the assumed back layer are removed.

  If the volume density of the assumed main body layer is 120% or more and less than 200% of the volume density of the bubble particles, it is regarded as “a main body layer in which the bubble particles are partially broken” in the present invention. On the other hand, if the volume density of the assumed main body layer is 100% or more and less than 120% of the volume density of the bubble particles, it is regarded as “a main body layer in which the bubble particles are unbreakable” in the present invention.

  Next, the bubble particle plate according to the first embodiment of the present invention will be described.

In Example 1 of the present invention, first, the following bubble particles and a binder were prepared.
(1) Bubble particles 57kg (75% by weight): Foam perlite (obsidian perlite) obtained by crushing, firing and foaming obsidian
(2) Binder 19 kg (25% by weight): sodium hydroxide, clay, water (a) Sodium hydroxide 6 kg (about 7.89% by weight)
(B) 4 kg of clay (about 5.26% by weight)
(C) 9 kg of water (about 11.84% by weight)

  Next, a mixture of bubble particles and a binder is prepared, and the prepared mixture is pressure-molded into a plate shape while being vibrated with a mold molding apparatus, irradiated with far-infrared rays for 10 minutes, and then at a temperature of 100 to 250 degrees. It was exposed to hot air for 20 minutes, dried, and baked at a temperature of 800 to 1200 ° C. for 30 minutes to produce a bubble granule having a width of 670 mm, a depth of 970 mm, and a thickness of 20 mm.

The “assumed surface layer” in the bubble particle plate thus produced had a thickness of 0.25 mm and a volume density of 492 kg / m ³ . In addition, the “assumed main body layer” in the produced bubble plate had a thickness of 19.5 mm and a volume density of 156 kg / m ³ . In addition, the “assumed back layer” in the produced bubble plate had a thickness of 0.25 mm and a volume density of 486 kg / m ³ .

Since the volume density of obsidian perlite is 120 kg / m ³ , the above assumed surface layer corresponds to the “surface layer” in the present invention, and the above assumed main body layer corresponds to the “main body layer” in the present invention. The assumed back layer corresponds to the “back layer” in the present invention. Therefore, the bubble particle plate according to Example 1 was provided with the “surface layer”, “main body layer”, and “back surface layer” in the present invention.

  Cross-sectional photographs of the bubble particle plate thus produced are shown in FIGS. FIG. 5 is a cross-sectional photograph (part 1) showing a part of the bubble particle plate according to Example 1, and FIG. 6 is a cross-sectional photograph (part 2) showing a part of the bubble particle plate according to Example 1. FIG. 7 is a cross-sectional photograph (part 3) showing a part of the bubble particle plate according to the first embodiment.

  In the cross-sectional photograph shown in FIG. 5, a part of the surface layer and a part of the main body layer are shown. Moreover, in the cross-sectional photograph shown by FIG. 6, a part of main body layer is shown. Moreover, in the cross-sectional photograph shown by FIG. 7, a part of main body layer and a part of back layer are shown.

(Comparative Example 1)
Next, a bubble particle plate according to Comparative Example 1 of the present invention will be described.

Also in Comparative Example 1, as in Example 1, the following bubble particles and a binder were prepared.
(1) Bubble particles 57kg (75% by weight): Foam perlite (obsidian perlite) obtained by crushing, firing and foaming obsidian
(2) Binder 19 kg (25% by weight): sodium hydroxide, clay, water (a) Sodium hydroxide 6 kg (about 7.89% by weight)
(B) 4 kg of clay (about 5.26% by weight)
(C) 9 kg of water (about 11.84% by weight)

  Next, a mixture of bubble particles and a binder is produced, and the produced mixture is fired at a temperature of 800 to 1200 ° C. for 30 minutes while being pressure-molded into a plate shape by a mold-type molding apparatus, and has a width of 670 mm and a depth. Produced a bubble particle plate having a thickness of 970 mm and a thickness of 20 mm.

The “assumed surface layer” in the thus produced bubble plate had a thickness of 0.25 mm and a volume density of 156 kg / m ³ . In addition, the “assumed main body layer” in the produced bubble plate had a thickness of 19.5 mm and a volume density of 156 kg / m ³ . Further, the “assumed back layer” in the produced bubble particle plate had a thickness of 0.25 mm and a volume density of 156 kg / m ³ .

Since the volume density of obsidian perlite is 120 kg / m ³ , the assumed surface layer does not correspond to the “surface layer” in the present invention, and the assumed body layer does not correspond to the “body layer” in the present invention. The above assumed back layer does not correspond to the “back layer” in the present invention. Therefore, the bubble particle plate according to Comparative Example 1 did not include the “surface layer”, “main body layer”, and “back surface layer” in the present invention.

(Comparative Example 2)
Finally, the bubble particle plate according to Comparative Example 2 will be described.

Also in Comparative Example 2, as in Example 1 and Comparative Example 1, the following bubble particles and binder were prepared.
(1) Bubble particles 57kg (75% by weight): Foam perlite (obsidian perlite) obtained by crushing, firing and foaming obsidian
(2) Binder 19 kg (25% by weight): sodium hydroxide, clay, water (a) Sodium hydroxide 6 kg (about 7.89% by weight)
(B) 4 kg of clay (about 5.26% by weight)
(C) 9 kg of water (about 11.84% by weight)

  Next, bubble particles and a binder are mixed to prepare a mixture, and the prepared mixture is pressure-molded into a plate shape without being vibrated with a mold-type molding apparatus, and irradiated with far infrared rays for 10 minutes. It was dried by exposure to hot air of ˜250 degrees for 20 minutes, and baked at a temperature of 800 to 1200 degrees for 30 minutes.

  However, in Comparative Example 2, the bubble particles could not be formed into a plate shape. This is because the mold was not vibrated during the pressure molding by the mold molding apparatus, and thus the surface layer and the back surface layer as in Example 1 were not formed in the mixture of the bubble particles and the binder, The cause is considered to be out of shape during irradiation, hot-air drying, and firing.

  Therefore, depending on the comparative example 2, a plate-shaped bubble particle plate could not be produced.

  As mentioned above, although embodiment and the Example of this invention were described, these description is description regarding an example of this invention, and this invention is not limited at all by the said description.

It is a figure which shows typically the bubble particle board which concerns on embodiment of this invention. It is a figure which shows the AA cross section and BB cross section in FIG. It is a figure explaining in detail about the section of child bubble grain board 15 shown in Drawing 2 (a). It is a flowchart which shows typically the manufacturing method of the bubble particle board which concerns on embodiment of this invention. It is a figure which shows the cross-sectional photograph (the 1) which shows a part of bubble particle board which concerns on Example 1. FIG. It is a figure which shows the cross-sectional photograph (the 2) which shows a part of bubble particle board which concerns on Example 1. FIG. It is a figure which shows the cross-sectional photograph (the 3) which shows a part of bubble particle board which concerns on Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Parent cell particle plate 11-19 Child bubble particle plate 20 1st area | region 30 2nd area | region 40 Surface layer 50 Main body layer 60 Back surface layer 70 Semi-broken bubble particle 80 Completely broken bubble particle 90 Binder 100 Unbreakable Bubble particle 110 Mixer 120 Mixer 130 Hopper 140 Mold molding device 141 Vibration press 142 Mold 150 Rolling molding device 151 Rolling roller 152 Vibration press 153 Plate 160 Plate-shaped molded body 170 Far infrared device 180 Hot air device 190 Firing furnace 200 Parent Bubble particle plate 210 Child bubble particle plate L1 to L4 Cutting line x width y depth z thickness

Claims (2)

A mixture production step for producing a mixture comprising 60% by weight to 90% by weight of foamed perlite and 10% by weight to 40% by weight of the binder;
A molding step in which the mixture prepared in the mixture preparation step is pressure-molded into a plate shape while being vibrated by a forming apparatus, and a plate-like formed body in which the collapse of the shape is prevented due to a difference in volume density, and
A firing step of firing the pre-Symbol molding process produced in the plate-like molded body after removal from the molding device,
I have a,
The plate-shaped molded body has a surface layer and a back layer whose volume density is 200% or more of the volume density of foamed pearlite outside the thickness ratio of 1.25%, and inside the thickness ratio of 1.25%. Having a body layer whose volume density is 120% or more and less than 200% or 100% or more and less than 120% of the volume density of foamed perlite,
A method for producing a foamed perlite plate. 2. The method for producing a foamed pearlite plate according to claim 1, wherein the plate-like molded body produced in the molding step is dehydrated after being taken out of the molding apparatus and before the firing. 3.

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