KR101117951B1 - Prefabricated panel and manufacturing method thereof - Google Patents

Abstract

The present invention is a method for manufacturing a prefabricated panel for building, the liquid binder resin is applied to one surface of the PC resin roll plate (4a) supplied from the first uncoiler (16) while spraying the liquid binder resin in the coating unit 18 of hot air environment And then uniformly coated, and then the liquid binder resin applied to the one surface through the cooling dryer 24 is cured, and the first roll forming machine 26 having the heater is applied to the PC resin roll plate 4a on which the binder resin is applied and cured. While passing through it, the bent pieces 42 and 44 for the assembling protrusions and the assembling grooves are molded on both side edges, and the metal roll plate 6a supplied from the second uncoiler 10 passes through the second roll forming machine 14. PC resin roll plate (4a) and through the first roll forming machine 26 and the second roll forming machine 14 to form the bending piece 46, 48 for the assembling protrusion and the assembling groove at both outer edges Hot air after allowing the foam insulation to be foamed by the foaming machine 28 between the metal roll plates 6a Hayeoseo presses the oil supply compression molding machine 30, which is one to obtain prefabricated panels (A).

Prefabricated Panel for Building, PC Resin

Description

Prefabricated panel for building and its manufacturing method {PREFABRICATED PANEL AND MANUFACTURING METHOD THEREOF}

The present invention relates to the manufacture of building panels used as interior and exterior wall finishing or roofing finishing materials of various buildings, and more particularly to a prefabricated panel for building having a smooth texture and beautiful appearance and easy to prevent corrosion.

Prefabricated panels (also called "sandwich panels") used for interior and exterior wall finishing or roof finishing panels of various buildings are metal plates pressed on both sides of a main body board made of internal insulation, and female and female assembly pieces are formed on the left and right edges.

Prefabricated panels for building have advantages such as robustness, excellent flame retardancy and insulation effect, waterproof and soundproof effect, beautiful appearance and shorten construction period, and thus are widely used in general buildings, warehouses and factories. Prefabricated panels for building use styrofoam, glass wool, etc. as their inner insulation, and common steel plates and embossed iron plates are also used for metal plates on both sides.

In addition, the prefabricated panels for building are now being rolled out to color-printed steel sheet in line with modern architecture, where various colors, patterns and beautiful aesthetics are important. Prefabricated panels with color printed steel are products that respond to the individual design patterns required by consumers, which ensures the value added to the owners of the property and guarantees the value of construction contractors.

Building prefabricated panel having such a color-printed steel sheet has a disadvantage in that the manufacturing cost increases due to the completion of manufacturing through a large number of coating film formation and heat treatment on the metal plate, and the salinity is included as time passes or the beach In high-humidity environments, such as the interior of refrigeration and freezing warehouses, rust and corrosion often occurred on the exterior metal panels of prefabricated panels, even though they were coated.

In particular, if the rust is generated in the piece fastening hole of the prefabricated panel for building and less in water, such as moisture or rain, the rust flows on the outer surface, causing stains, so there is a problem that is not good to look.

Therefore, an object of the present invention is to provide a prefabricated panel for building having a smooth texture and beautiful appearance and easy to prevent rust and corrosion, and a method of manufacturing the same.

The present invention for achieving the above object, while applying the liquid binder resin to one surface of the PC resin roll plate (4a) supplied from the first uncoiler 16, spraying the liquid binder resin in the coating unit 18 of hot air environment After spraying and uniformly applying, the liquid binder resin applied to the one surface is cured through the cooling dryer 24, and the first roll forming machine 26 having the heater is applied to the PC resin roll plate 4a on which the binder resin is applied and cured. While passing through, the bent pieces 42 and 44 for the assembling protrusions and the assembling grooves are molded on both outer edges, and the second roll forming machine 14 is connected to the metal roll plate 6a supplied from the second uncoiler 10. PC resin roll plate (4a) is passed through the first roll forming machine 26 and the second roll forming machine 14 to be formed in the bending portion 46, 48 for the assembly protrusion and the assembly groove portion on both sides of the outer edge while passing through. Hot air is supplied after the foam insulation is foamed by the foaming machine 28 between the and the metal roll plates 6a. Is a prefabricated panel manufacturing method characterized in that the preformed panel (A) is obtained by compression molding with a press molding machine (30).

In addition, the present invention, the liquid binder resin is applied to one surface of the first PC resin roll plate (4a) supplied from the first uncoiler 16, but uniformly applied by spraying the liquid binder resin in the coating portion 18 of the hot air environment After curing, the liquid binder resin applied to the one surface is cured through the cooling dryer 24, and the PC resin roll plate 4a coated with the binder resin is passed through the first roll forming machine 26 having a heater. Bending pieces (42) and (44) for assembling protrusions and assembling grooves are molded on the outer edge, and a liquid binder resin is applied to one surface of the second PC resin roll plate (40a) supplied from the second uncoiler (116). After spraying the liquid binder resin in the coating portion 118 of the coating unit 118 to uniformly apply and then harden the liquid binder resin applied to the one surface through the cooling dryer 124, the second PC resin roll plate coated with the binder resin ( 40a) second with heater While passing through the roll forming machine 126, the bent pieces 46 and 48 for the assembling protrusions and the assembling grooves are formed on both outer edges, and the first roll forming machine 26 and the second roll forming machine 126 are formed. A prefabricated panel (A1) is formed by pressing the foam insulation material foamed by the foaming machine 28 between the rough first and second PC resin roll plates 4a and 40a and then pressing the sheet by pressing with a press molding machine 30 that is supplied with hot air. It is a method of manufacturing a prefabricated panel for building characterized in that it is obtained.

The present invention is composed of a PC (PolyCarbonate) resin material of at least one of the outer skin material attached to both sides of the main body plate made of the inner foam insulation of the prefabricated panel for building to have a smooth texture and beautiful appearance as well as to prevent rust and corrosion There is an advantage that it is easy and prevents stains caused by green water.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a manufacturing apparatus of a prefabricated panel for building according to an embodiment of the present invention, Figures 2 and 3 are a perspective view and an exploded perspective view of a prefabricated panel for building according to an embodiment of the present invention. 9 is an example of a modification of the prefabricated building panel according to an embodiment of the present invention, Figure 10 is a cross-sectional view of FIG. And, Figure 11 is a schematic diagram of a manufacturing apparatus of a prefabricated panel for building according to another embodiment of the present invention, Figure 12 is a cross-sectional view of a prefabricated panel for building according to another embodiment of the present invention.

Prefabricated panel (A) (A1) of the present invention is at least one or more of the outer skin member (4) (6) attached to both sides of the main body plate (2) of the inner foam insulation or mat-shaped glass fiber insulation. PolyCarbonate) is made of resin material.

2 and 3 show an embodiment in which the first skin member 4 of the skin members 4 and 6 is a PC resin board member and the second skin member 6 is a metal plate member as in the prior art. The inner surface of the first outer cover member 4 made of PC resin material is coated with a binder resin layer 8 so as to be thermally bonded to the main body plate 2 made of an inner foam insulation.

As shown in FIGS. 2 and 3, 9, and 10, the prefabricated panel A made of a PC resin board is manufactured through the manufacturing apparatus 100 of FIG. 1 and the manufacturing apparatus 300 of FIG. 13. do.

In addition, as shown in FIG. 12, the outer skin members 4 and 6 of the prefabricated panel A1 for building may be all made of a PC resin material, and are made of a PC resin material. On each inner surface of (4) (6), a binder resin layer 8 is formed by coating. Fabrication of the prefabricated building panel A1, both sides of which are made of PC resin plate material, is produced through the manufacturing apparatus 200 shown in FIG.

In the present invention, the PC resin plate material constituting at least one side of the outer skin material (4) (6) constituting the building prefabricated panel (A) (A1) is excellent in impact resistance, heat insulation and electrical insulation, workability, transparency, durability It is a material with characteristics. PC resin board material has good impact resistance, more than 150 times of existing tempered glass, 250 times of plate glass, and 30 times of acrylic.

In the present invention, PC resin having various monochromatic colors by adding color pigments when manufacturing the PC resin base material of the present invention to be more suitable to use the PC resin material as the outer skin of the prefabricated panel (A) (A1) for building. It is more preferable that the plate material can be implemented, and a reflection layer is formed on the rear surface so that the main body plate 2 is not visible.

In addition, the back surface of the PC resin plate material to be applied to the prefabricated building panel of the present invention by screen printing or the like, so that the inner body plate (2) is not visible, but may be formed of a multicolored color or various patterns or patterns.

PC resin plate material employed in the present invention is suitable for winding the uncoiler (16 in FIGS. 1 and 13, 16, 116 in FIG. 11) to the manufacturing device of the building prefabricated panel as shown in Figs. It is preferable to have a thickness of 1 to 1.5 mm to facilitate molding as a plate (4 in FIG. 2, 4,6 in FIG. 12). If the thickness of the outer cover material (4) of the PC resin material is less than 1mm, molding is difficult and breakage is easy. If the thickness exceeds 1.5mm, the production cost is expensive and there is a problem in winding the uncoiler.

4 to 7 is a working state diagram in each part in the manufacturing apparatus 100 of FIG. 1 for manufacturing the building prefabricated panel (A) shown in FIGS.

The PC resin roll plate 4a for constituting the first outer cover member 4, which is a PC resin sheet member having a thickness of 1 to 1.5 mm, is wound around the first uncoiler 16, and constitutes a second outer cover member 6 which is a metal plate member. The metal roll plate 6a to be wound is wound around the second uncoiler 10.

 The PC resin roll plate 4a supplied from the first uncoiler 16 is introduced into the coating unit 18 including the foreign matter removing injector 20 and the hot air resin spraying machine 22. The injector 20 for removing foreign substances of the coating unit 18 sprays air to remove foreign substances such as dust on the surface before forming the binder resin layer 8 on one surface of the PC resin roll plate 4a. The hot air resin spraying machine 22 of the subsequent stage has a hot air temperature of 20 to 30 ° C. at the same time, and the liquid binder resin supplied from the binder resin tank is removed from the PC resin roll plate 4a on which one side of the PC resin roll plate 4a is removed. It is sprayed through the spray nozzle 40 to make a uniform coating.

The liquid binder resin is an acrylic binder resin, the hot air temperature of 20 ~ 30 ℃ is a temperature suitable for uniformly applying the liquid binder resin on one surface of the PC resin roll plate (4a).

The PC resin roll plate 4a having passed through the coating unit 18 hardens the liquid binder resin previously applied through the cooling dryer 24 so that the binder resin layer 8 is formed on one surface of the PC resin roll plate 4a. .

The PC resin roll plate 4a having the binder resin layer 8 adhered thereon passes through the first roll forming machine 26 having a heater, and as shown in FIG. The bouillon bent piece 44 is molded. The heater of the first roll forming machine 26 is provided inside each roller, and the heating temperature and the internal atmosphere temperature of the roll surface are preferably 130 to 150 ° C. with good processability and no change in physical properties. If the heating temperature of the first roll forming machine 26 is less than 130 ° C. and the surface heat deformation is poor, molding may not be performed well, and if the temperature exceeds 150 ° C., the physical properties may be changed.

The PC resin roll plate 4a which has passed through the first roll forming machine 26 is supplied to the foaming machine 28. In the foaming machine 28, when the polyurethane liquid is sprayed onto the PC resin roll plate 4a, the foam insulation material 2a is formed on the PC resin roll plate 4a as shown in FIG. Let's do it. The foam insulation 2a foamed on the PC resin roll plate 4a is self-heated at the time of foaming, so that a temperature of 25-50 ° C. is generated. The polyurethane foam insulation is adhesively formed on the binder resin layer 8 on the PC resin roll plate 4a because of excellent foaming force and adhesion.

The PC resin roll plate 4a passing through the foaming machine 28 is fed into the compression molding machine 30.

Meanwhile, the metal roll plate 6a for constituting the second shell plate material 6, which is a metal plate material, has a thickness of 0.4 to 0.5 mm similar to that of the existing metal plate material and is wound around the second uncoiler 10.

The metal roll plate 6a supplied from the second uncoiler 10 passes through the second roll forming machine 14 located on the upper side of the pedestal, and assembling bending parts 46 and the assembling protrusions 46 at both outer edges as shown in FIG. 5. The grooved bending piece 48 is molded. The metal roll plate 6a passing through the second roll forming machine 14 is directly introduced into the press molding machine 30.

The press molding machine 30 presses the metal roll plate 6a supplied from the second roll forming machine 14 and the PC resin roll plate 4a supplied from the foaming machine 28 to have a predetermined thickness for forming an assembly panel. It is passed through the belt 30a, 30b, and is press-molded by a compression belt wound around the upper and lower roller pairs with the foam insulation 2a interposed between the metal roll plate 6a and the PC resin roll plate 4a. At this time, the press molding machine 30 supplies electric hot air to maintain the self-heating temperature of 25 to 50 ° C. of the foam insulation 2a foamed on the PC resin roll plate 4a. Press molding together.

Thereafter, the prefabricated panel passing through the press molding machine 30 passes through the panel cutting machine 32, and the prefabricated building panel A having a predetermined unit width as shown in FIGS. 2 and 8 is completed.

In Figure 8 is a cross-sectional view of the prefabricated panel (A) for building according to an embodiment of the present invention, the second shell plate member 6 made of a metal plate attached to the upper surface of the body plate 2 made of polyurethane foam insulation On the binder resin layer 8 applied to the lower surface of the body plate 2, it can be seen that the first shell plate material 4 made of PC resin material is attached.

9 is an example of a modification of the building panel according to an embodiment of the present invention, Figure 10 is a cross-sectional view of FIG.

9 and 10, the prefabricated panel A shown in FIG. 9 is composed of a glass fiber material of the main body plate 2 made of an inner heat insulating material, and a binder resin layer (B) on the upper surface of the main body plate 2 of the glass fiber heat insulating material. After the 8) is interposed, the second outer cover member 6 made of metal plate is attached and formed, and the first outer cover made of PC resin material after the binder resin layer 8 is interposed on the lower surface of the body plate 2. The board | plate material 4 is the structure by which attachment was formed. At this time, the glass fiber body plate 2 is supplied from another uncoiler (29 of FIG. 13) for supplying the mat-shaped glass fiber insulation.

In addition, it is to be understood that both the first and second skin plates 4 and 6 formed with the main body plate 2 made of glass fiber material may be implemented as PC resin materials.

FIG. 13 is a schematic diagram of a manufacturing apparatus 300 for manufacturing a building prefabricated panel A as shown in FIGS. 9 and 10.

FIG. 11 is a schematic diagram of a manufacturing apparatus 200 for building prefabricated panel A1 according to another embodiment of the present invention, wherein the prefabricated panel A1 is shown in FIG. 12. All are composed of PC resin material.

The manufacturing apparatus 200 of FIG. 11 may include a coating part including a first uncoiler 16, a foreign matter removing injector 20, and a hot air resin spraying machine 22 having the same reference numerals as those of the manufacturing apparatus 100 of FIG. 1. 18), the cooling dryer 24, the first roll forming machine 26, the foaming machine 28, the compression molding machine 30, the panel cutting machine 32 has the same function as described above, the second uncoiler ( 116, the coating unit 118, the cooling dryer 124, the second roll forming machine 126 of the injector 120 for removing the foreign matter and the hot air resin sprayer 122, the first uncoiler 16, foreign matter A coating unit 18, a cooling dryer 24, a first roll forming machine 26, a foaming machine 28, a press molding machine 30, and a panel, each of which has a spraying machine 20 for removing and a hot air resin spraying machine 22. Functions the same as the cutter 32.

Reference numeral '40a' unrolled from the second uncoiler 116 is a second PC resin roll plate.

The manufacturing apparatus 200 of FIG. 11 applies uniformly by applying hot air with spray spraying from the coating portion 18 to the liquid binder resin on one surface of the first PC resin roll plate 4a supplied from the first uncoiler 16. After curing, the liquid binder resin applied through the cooling dryer 24 is cured, and the PC resin roll plate 4a coated with the binder resin is assembled to both outer edges while passing through the first roll forming machine 26 having a heater. The bending pieces 42 and 44 for the protrusion and the assembly groove are molded.

In addition, the liquid binder resin is applied to one surface of the second PC resin roll plate 40a supplied from the second uncoiler 116 by spraying the coating unit 118 with hot air to uniformly apply the cooling dryer 124. Bending piece for assembling protrusions and assembling grooves on both outer edges while curing the liquid binder resin applied thereto, and passing the second PC resin roll plate 40a coated with the binder resin through a second roll forming machine 126 having a heater. (46) (48) are molded.

Thus, the polyurethane foam insulation material foamed by the foaming machine 28 between the first and second PC resin roll plates 4a and 40a which have passed through the first roll forming machine 26 and the second roll forming machine 126 ( 2a) is interposed, and then press-molded with a press molding machine 30, which is supplied with hot air, to obtain a prefabricated panel, and to cut a predetermined unit width with the panel cutting machine 32, and the PC resin outer skin member (4) on the upper and lower surfaces of the body plate (4). (6) to form a prefabricated building panel (A1) is completed.

Meanwhile, in the manufacturing apparatus 300 of FIG. 13, the liquid binder resin is applied to one surface of the PC resin roll plate 4a supplied from the first uncoiler 16 by applying hot air together with spray spraying from the coating unit 18 so as to be uniformly applied. Then, the liquid binder resin applied through the cooling dryer 24 is cured, and the PC resin roll plate 4a having the binder resin applied and cured is passed through the first roll forming machine 26 having a heater to be assembled at both outer edges. And the bending pieces 42 and 44 for the assembly groove.

In addition, the liquid binder resin is applied to the surface of the metal roll plate 6a supplied from the second uncoiler 116 by uniformly applying hot air with spray spraying from the coating unit 118, and then the liquid applied through the cooling dryer 24. The binder resin is cured, and the bent pieces 46 and 48 for the assembling protrusions and the assembling grooves are formed on both outer edges while passing through the second roll forming machine 126. .

The hot air is supplied after the glass fiber insulation material 2b supplied from the glass fiber mat supply uncoiler 29 is interposed between the roll plates which have passed through the first roll forming machine 26 and the second roll forming machine 126. Press-molding with a press molding machine (30) to obtain a prefabricated panel and by cutting a predetermined unit width with a panel cutting machine (32) between at least one surface of the outer skin member (4) (6) of the PC resin material glass fiber material body plate ( 2) formed building prefabricated panel (A1) to be completed.

In FIG. 12, the second uncoiler 116 has been described as the metal roll plate 6a, but it should be understood that it can be replaced by the PC resin roll plate 40a.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

Prefabricated building panel (sandwich panel) of the present invention can be used as interior and exterior wall finishing or roof finishing panels of the building.

1 is a schematic view of a manufacturing apparatus of a prefabricated panel for building according to an embodiment of the present invention;

2 and 3 are a perspective view and an exploded perspective view of the prefabricated panel for building construction of the present invention,

4 to 7 is a working state in each part of the prefabricated panel manufacturing apparatus for building,

8 is a cross-sectional view of the prefabricated building panel according to an embodiment of the present invention,

Figure 9 is an example of a modification of the building prefabricated panel according to an embodiment of the present invention,

10 is a cross-sectional view of FIG.

Figure 11 is a schematic view of the manufacturing apparatus of a prefabricated panel for building according to another embodiment of the present invention,

12 is a sectional view of a prefabricated panel for building according to another embodiment of the present invention;

Figure 13 is a schematic view of the manufacturing apparatus of a prefabricated panel for building according to a modified embodiment of the present invention.

 <Explanation of symbols for the main parts of the drawings>

(2)-Main body plate (4) (6)-Outer plate material

(2a)-foam insulation (2b)-fiberglass insulation

(4a)-PC resin roll plate (6a)-metal roll plate

(8)-Binder Resin Layer (10) (116)-Second Uncoiler

(14) (126)-Second Roll Former (16)-First Uncoiler

(18)-Coating (20)-Debris Sprayer

(22)-Hot air resin spray (24)-Cooling dryer

(26)-first roll forming machine (28)-foaming machine

(30)-Crimping Machine (32)-Panel Cutting Machine

Claims (7)

The liquid binder resin is applied to one surface of the PC resin roll plate 4a supplied from the first uncoiler 16, but the liquid binder resin is spray-sprayed from the coating unit 18 in a hot air environment to uniformly apply the cooling dryer 24. Curing the binder resin coated on the one surface through the through), and through the first roll forming machine 26 having a heater to pass through the PC resin roll plate (4a) coated with the binder resin assembling protrusions and assembly grooves on both sides Bouillon bending pieces 42, 44 are molded, While the metal roll plate 6a supplied from the second uncoiler 10 passes through the second roll forming machine 14, the bending pieces 46 and 48 for the assembling protrusions and the assembling grooves are formed on both outer edges thereof. After the foam insulation material foamed by the foaming machine 28 is interposed between the PC resin roll plate 4a and the metal roll plate 6a which have passed through the first roll forming machine 26 and the second roll forming machine 14. Method of manufacturing a prefabricated panel for building, characterized in that the prefabricated panel (A) is obtained by compression molding with a hot press supplied press molding machine (30). The hot air temperature of the coating unit 18 is 20 ~ 30 ℃, the heating temperature of the first roll forming machine 26 is 130 ~ 150 ℃, hot air temperature in the compression molding machine (30) Method of manufacturing a prefabricated panel for building, characterized in that 25 ~ 50 ℃. Apply liquid binder resin to one surface of the first PC resin roll plate 4a supplied from the first uncoiler 16, and spray the liquid binder resin in the coating unit 18 in a hot air environment to uniformly apply the cooling dryer. (24) to cure the liquid binder resin applied to the one surface, and through the first roll forming machine 26 having a heater to pass the PC resin roll plate (4a) coated with the binder resin and the assembling protrusions on both sides and To make the bent pieces 42 and 44 for the assembly groove, The liquid binder resin is applied to one surface of the second PC resin roll plate 40a supplied from the second uncoiler 116, but the liquid binder resin is spray-sprayed from the coating unit 118 in a hot air environment to uniformly apply the cooling dryer. Curing the liquid binder resin applied to the one surface through the 124, and the second PC resin roll plate (40a) coated with the binder resin is assembled to both outer edges while passing through the second roll forming machine 126 having a heater The bending pieces 46 and 48 for the protrusion and the assembly groove are molded, A foam insulation material foamed by the foaming machine 28 is interposed between the first and second PC resin roll plates 4a and 40a which have passed through the first roll forming machine 26 and the second roll forming machine 126. Method of manufacturing a prefabricated panel for building, characterized in that the prefabricated panel (A1) is obtained by compression molding with a hot press supplied press molding machine (30). According to claim 3, wherein the hot air temperature in the coating unit 18 is 20 ~ 30 ℃, the heating temperature of the first and second roll forming machine 26, 14 is 130 ~ 150 ℃, the pressing molding machine ( 30) hot air temperature is 25 ~ 50 ℃ building prefabricated panel manufacturing method characterized in that. The liquid binder resin is applied to one surface of the PC resin roll plate 4a supplied from the first uncoiler 16, but the liquid binder resin is spray-sprayed from the coating unit 18 in a hot air environment to uniformly apply the cooling dryer 24. Curing the binder resin coated on the one surface through the through), and through the first roll forming machine 26 having a heater to pass through the PC resin roll plate (4a) coated with the binder resin assembling protrusions and assembly grooves on both sides Bouillon bending pieces 42, 44 are molded, The liquid binder resin is applied to one surface of the metal roll plate and the PC resin roll plate which can be supplied from the second uncoiler 116, but is spray-sprayed from the coating unit 118 in a hot air environment to uniformly apply the cooling dryer. Curing the liquid binder resin applied to the one surface through the 124, the bending plate for the assembling protrusion and the assembling groove 46 on both sides while passing through the second roll forming machine 126, the roll plate coated with the binder resin is cured (48) is molded, The prefabricated panel (A) is formed by pressing the glass fiber insulating material 2b between the first roll forming machine 26 and the second roll forming machine 126 through a press molding machine 30 which is supplied with hot air. Method of manufacturing a prefabricated panel for building, characterized in that obtained. In prefabricated panel for building, An outer shell member having a main body plate 2 made of one of the foam insulation material 2a and the mat-shaped glass fiber insulation material 2b, and both sides of the main body plate 2, each outer edge having a bent piece for the assembling protrusion and the assembling groove. (4) and (6), wherein at least one of the outer skin members (4) and (6) is formed of a PC resin board member, wherein the PC resin board member and the main body plate (2) are joined by a binder resin layer (8). Prefabricated panel for building characterized in that. The prefabricated panel for building according to claim 6, wherein the PC resin plate material has a thickness of 1 to 1.5 mm.

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