Gypsum board suspended ceiling splicing anti-cracking device and method thereof

Abstract

The application relates to a gypsum board suspended ceiling splicing anti-cracking device and a method thereof, which comprises two support plates, the two support plates are vertically connected, the two support plates are respectively attached to two adjacent surfaces of a gypsum board to be cut, a blade and a scribe are arranged between the inner sides of the two support plates, one end of the blade is connected with a support plate and the other end is connected with the other support plate, the scribe is connected with a support plate, and the scribe is located in front of the rake face of the blade. The application has the effect that when a chamfer is cut on a gypsum board, the two adjacent surfaces of the gypsum board are respectively attached to the two support plates, the support plates are pushed, the scribe is abutted with the gypsum board and a scribe groove is drawn on the gypsum board, then the blade cuts the part which has been scribed; since the scribe groove is drawn on the gypsum board in advance, the cutting part of the gypsum board is thinned, so that the risk of edge damage of the cut gypsum board and the risk of blade breakage are reduced.

Description

Technical Field

[0001] This application relates to the field of building construction, and in particular to a device and method for preventing cracking during splicing of gypsum board ceilings. Background Technology

[0002] When installing gypsum board ceilings on construction sites, adjacent boards are often directly spliced ​​together without any treatment. Later, when applying ceiling putty, only alkali-resistant mesh is added to this area. After a period of time, cracks appear in this area to varying degrees, leading to significant repair costs. To address the problem of cracking at the joints of adjacent gypsum board boards, the edges of the gypsum board are beveled, and filler material is inserted into the beveled corners of adjacent boards to strengthen the bond between them.

[0003] A plasterboard chamfering and cutting tool is available, comprising: a handle and a cutting part arranged sequentially along a first direction; the handle has a first groove, the cross-section of which is a right-angled triangle; the cutting part includes a bottom, a top, and a blade, the blade being located on the top side away from the bottom, and the top is spaced apart from the handle; the bottom has a first hollow section, the cross-section of which is an isosceles trapezoid; the legs of the isosceles trapezoid coincide with the right-angled side of the right-angled triangle; the top includes a tenth surface, the blade edge coinciding with the end of the first hollow section away from the seventh surface; the storage part is a bottomless box, the top of which has an opening area, one end of a conduit connected to the opening area, and the other end connected to a dust collection device. The first hollow section and the first groove fix the position, ensuring cutting accuracy; the inclined blade provides low cutting resistance and smooth cutting.

[0004] Regarding the aforementioned techniques, chamfering applies a certain amount of force to the edges of the gypsum board. If the force is inappropriate or the tool is not sharp, it may cause damage or breakage of the gypsum board edges. This will affect the overall aesthetics and structural strength of the gypsum board. Summary of the Invention

[0005] To reduce the risk of edge damage or breakage of gypsum board during the cutting process, this application provides a gypsum board ceiling splicing anti-cracking device and method.

[0006] The technical solution for the anti-cracking device for splicing gypsum board ceilings provided in this application is as follows:

[0007] A gypsum board ceiling splicing anti-cracking device includes two support plates, which are vertically connected. The two support plates are respectively attached to two adjacent surfaces of the gypsum board to be cut. A blade and a scriber are provided between the inner sides of the two support plates. One end of the blade is connected to the support plate and the other end is connected to the other support plate. The scriber is connected to the support plate and is used to contact the part of the gypsum board to be cut. The scriber is located at the front end of the blade.

[0008] By adopting the above technical solution, when cutting chamfers on gypsum board, the two adjacent surfaces of the gypsum board are respectively attached to two support plates. Then, the support plates are pushed so that the scriber approaches the gypsum board before the blade. The scriber abuts against the gypsum board and passes through the area to be cut, making a groove of a certain depth on the gypsum board. Then, the blade passes through the area to be cut and cuts the grooved area. During the cutting process, the scriber pre-cuts a groove of a certain depth on the gypsum board before the blade cuts, making the cut area of ​​the gypsum board thinner and reducing the strength of the cut area. This reduces the risk of edge damage or breakage of the gypsum board and blade breakage during the cutting process.

[0009] Optionally, the support plate is provided with a through groove, the through groove extending perpendicular to the straight line formed at the connection of the two support plates, and the two ends of the blade are connected to the support plate through the through groove.

[0010] By adopting the above technical solution, the two ends of the blade are connected to the support plate through through grooves. When it is necessary to replace the blade with a different length, the initial blade is removed, and then the blades of other lengths are connected to different positions on the support plate through through grooves, so as to adapt to different sizes of chamfers.

[0011] Optionally, the support plate is provided with a sliding groove, the opening direction of which is parallel to the opening direction of the through groove on the same support plate, and the scribing blade is slidably connected to the support plate through the sliding groove.

[0012] By adopting the above technical solution, when changing to blades of different lengths, the scribing knife is moved along the groove so that it is once again located at the front end of the blade, thus allowing the scribing knife to adapt to blades of different lengths.

[0013] Optionally, the scriber is connected to an adjusting locking assembly for simultaneously adjusting the positions of the two scribers. The adjusting locking assembly includes a connecting rod and a locking member. One end of the connecting rod is hinged to the scriber, and the other end is connected to the locking member. The locking member is used to adjust the position of the connecting rod and lock the connecting rod.

[0014] By adopting the above technical solution, when adjusting the position of the scribing blade, the locking component is pulled, which drives the connecting rod to move. Subsequently, the connecting rod drives the scribing blades connected to different support plates to slide simultaneously in the slide groove, thereby adjusting the positions of the two scribing blades to the front end of the blade face in one go.

[0015] Optionally, the locking component includes a sliding plate, which is connected to the support plate and has a sliding groove. One end of the connecting rod is hinged to a connecting block, which is slidably connected to the sliding plate through the sliding groove. A snap-fit ​​component is provided between the connecting block and the sliding groove, and the snap-fit ​​component snaps into the sliding plate through the sliding groove.

[0016] By adopting the above technical solution, when the locking part is pulled, the position of the snap-fit ​​part is adjusted so that the snap-fit ​​part drives the connecting block to slide in the sliding groove. After the connecting block is adjusted to the appropriate position, the snap-fit ​​part engages with the sliding plate through the sliding groove, making it easier for the operator to adjust the position of the locking part.

[0017] Optionally, the snap-fit ​​element is an elastic block, and the sidewall edge shape of the sliding groove is a tooth shape that matches the sidewall of the snap-fit ​​element.

[0018] By adopting the above technical solution, when adjusting the position of the locking part, the elastic block is pressed down or pulled up. The elastic block deforms under the action of human force, thereby sliding along the sliding groove, and then driving the connecting block to slide. After the connecting block is adjusted to the appropriate position, the side wall of the elastic block abuts against the inner wall of the sliding groove. The inner wall of the sliding groove provides a certain limit to the elastic block, so that the position of the elastic block remains unchanged during the chamfering process.

[0019] Optionally, the cross-sectional dimension of the blade at the end closest to the scriber is smaller than the cross-sectional dimension of the blade at the end furthest from the scriber, and the cross-sectional dimension of the blade increases as it moves further away from the scriber.

[0020] By adopting the above technical solution, when cutting gypsum board, the smaller end of the blade contacts the gypsum board first. At this time, the contact area between the blade and the gypsum board is relatively small, so the blade only needs to overcome less resistance to cut, thereby reducing the force required for cutting. This makes it easier for the blade to enter and penetrate the gypsum board when it comes into contact with it, thus cutting the gypsum board more effectively, reducing jamming or getting stuck, reducing cutting resistance, and extending the service life of the blade. In addition, the beveled blade design can guide the fragments and dust generated when cutting gypsum board to one side or the rear to a certain extent, rather than flying towards the operator, thereby protecting the operator to a certain extent.

[0021] Optionally, the blade has a friction layer on the side that contacts the plasterboard.

[0022] By adopting the above technical solution, when cutting the chamfer, the blade cuts through the gypsum board and forms a chamfer on the gypsum board. Then, the friction layer contacts the chamfer and polishes the chamfer surface, making the cut chamfer surface smoother.

[0023] Optionally, a roller is rotatably connected to the support plate, the roller abutting against the plasterboard and rolling in the same direction as the movement direction of the support plate.

[0024] By adopting the above technical solution, when cutting the chamfer, the roller is brought into contact with the plasterboard, and the support plate is pulled. The support plate and the plasterboard move relative to each other through the roller, which transforms the sliding friction between the support plate and the plasterboard into rolling friction between the support plate and the roller. This reduces the resistance generated when the support plate moves, making it easier for the operator to cut the chamfer.

[0025] This application provides a method for preventing cracking during the splicing of gypsum board ceilings, which adopts the following technical solution:

[0026] The chamfering process involves attaching two adjacent surfaces of the plasterboard to the two support plates, then pushing the support plates so that the scriber approaches the plasterboard before the blade. The scriber abuts against the plasterboard and passes through the area to be cut, creating a groove of a certain depth on the plasterboard. Subsequently, the blade passes through the area to be cut and cuts the grooved area.

[0027] The splicing process involves joining together cut and beveled plasterboards, filling the grooves formed by two adjacent bevels with plaster.

[0028] For reinforcement, alkali-resistant mesh is pressed into the joints of the gypsum board, followed by the application of putty.

[0029] By adopting the above technical solution, when plaster is filled into the groove formed by the adjacent chamfers of the plasterboard, the moisture in the plaster will penetrate into the pores of the chamfer surface and form a certain bonding force with the two chamfer surfaces respectively, so that the joint between adjacent plasterboards is less likely to crack; at the same time, plaster can fill the gap between adjacent plasterboards, making the plasterboard ceiling smoother.

[0030] When adjacent gypsum board joints are subjected to external forces, the alkali-resistant mesh disperses and bears the external stress, ensuring its even distribution across the entire surface. This improves the tensile strength and crack resistance of the joint. Furthermore, as a reinforcing material, the alkali-resistant mesh forms a strong bond at the joint, reducing the expansion and deepening of existing cracks. In addition, the alkali-resistant mesh has alkali resistance, effectively resisting the erosion of plaster by alkaline substances, reducing the risk of alkaline substances penetrating into the plaster, and minimizing damage to the plaster, thereby further enhancing the crack resistance of adjacent gypsum board joints.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. When chamfering on plasterboard, place two adjacent sides of the plasterboard against two support plates respectively. Then push the support plates so that the scriber gets closer to the plasterboard before the blade. The scriber makes contact with the plasterboard and passes through the area to be cut, making a groove of a certain depth on the plasterboard. Then the blade passes through the area to be cut and cuts the grooved area. During the cutting process, the scriber makes a groove of a certain depth on the plasterboard before the blade cuts, making the cut area thinner and reducing the strength of the cut area. This reduces the risk of edge damage or breakage of the plasterboard and blade breakage during the cutting process.

[0033] 2. Both ends of the blade are connected to the support plate through through slots. When it is necessary to change to blades of different lengths, the initial blade is removed, and then blades of other lengths are connected to different positions on the support plate through through slots to adapt to different sizes of chamfers.

[0034] 3. When plaster is filled into the grooves formed by the adjacent chamfers of plasterboard, the moisture in the plaster will penetrate into the pores of the chamfer surface, forming a certain bonding force with the two chamfer surfaces respectively, thus making it less likely for cracks to occur at the joints of adjacent plasterboards; at the same time, plaster can fill the gaps between adjacent plasterboards, making the plasterboard ceiling smoother. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0036] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0037] Figure 3 This is a schematic diagram of gypsum board splicing according to an embodiment of this application;

[0038] In the diagram, 1. Support plate; 11. Through groove; 12. Sliding groove; 2. Plasterboard; 3. Blade; 31. Friction layer; 4. Scraper; 5. Adjusting and locking assembly; 51. Connecting rod; 52. Locking element; 521. Sliding plate; 5211. Sliding groove; 522. Connecting block; 523. Snap-fit ​​element; 6. Roller; 7. Handle; 8. Plaster; 9. Alkali-resistant mesh. Detailed Implementation

[0039] This application discloses a crack-prevention device for splicing gypsum board ceilings. (Refer to...) Figure 1A gypsum board ceiling splicing anti-cracking device includes two support plates 1, a blade 3, and two slicing blades 4. The two support plates 1 are vertically connected and are respectively attached to two adjacent surfaces of the gypsum board 2 to be cut. The two support plates 1 have through grooves 11 on the side facing the gypsum board 2, which are connected to the surface of the support plate 1 facing away from the gypsum board 2. The through grooves 11 extend perpendicularly to the straight line formed at the connection of the two support plates 1. One end of the blade 3 is connected to the support plate 1 through the through groove 11 on the support plate 1, and the other end is connected to the other support plate 1 through the through groove 11 on the other support plate 1. The two support plates 1 have sliding grooves 12 on the side facing the gypsum board 2, which are connected to the surface of the support plate 1 facing away from the gypsum board 2. The sliding grooves 12 extend parallel to the direction of the through grooves 11 on the same support plate 1 as the sliding grooves 12. The two slicing blades 4 are respectively connected to the two different support plates 1 through the through grooves 11 and are used to contact the part of the gypsum board 2 to be cut. The slicing blades 4 are located at the front end of the blade 3.

[0040] When chamfering the plasterboard 2, the two adjacent surfaces of the plasterboard 2 are respectively attached to the two support plates 1. At the same time, the scriber 4 is brought closer to the plasterboard 2 than the blade 3. Then, the support plate 1 is pushed so that the scriber 4 comes into contact with the plasterboard 2 and makes a groove of a certain depth on the plasterboard 2 along the cutting direction. Then the blade 3 cuts through the plasterboard 2 and cuts at the grooved area. During the cutting process, the scriber 4 makes a groove of a certain depth on the plasterboard 2 before the blade 3 cuts, so that the cut area of ​​the plasterboard 2 is thinner and the strength of the cut area of ​​the plasterboard 2 is reduced. This reduces the risk of edge damage or breakage of the plasterboard 2 and breakage of the blade 3 during the cutting process.

[0041] When different sizes of chamfers need to be cut, the blade 3 is removed through the through groove 11, and then different sizes of blades 3 are installed in different positions on the support plate 1 through the through groove 11, so that the blade 3 can cut chamfers of different sizes; accordingly, after replacing the blades 3 of different sizes, the two scribing blades 4 are slid along the slide groove 12, so that the two scribing blades 4 are again located at the front end of the blade 3, so that the scribing blades 4 can adapt to different sizes of blades 3.

[0042] Reference Figure 1 The blade 3 is bent inwards at both ends towards the two support plates 1 and has threaded holes at the bent parts. The blade 3 is threadedly connected to the support plate 1 through the threaded holes and through groove 11. The cross-sectional dimension of the end of the blade 3 near the scribbler 4 is smaller than the cross-sectional dimension of the end of the blade 3 away from the scribbler 4. The cross-sectional dimension of the blade 3 is larger as it is farther away from the scribbler 4. The blade 3 has a friction layer 31 on the side that contacts the plasterboard 2.

[0043] When cutting plasterboard 2, the end of the blade 3 with the smaller cross-sectional size contacts the plasterboard 2 first. At this time, the contact area between the blade 3 and the plasterboard 2 is relatively small, allowing the blade 3 to overcome only a small amount of resistance to cut the plasterboard 2, thereby reducing the force required for cutting. This makes it easier for the blade 3 to enter and penetrate the plasterboard 2 when in contact, thus cutting the plasterboard 2 more effectively, reducing jamming or getting stuck, reducing resistance during the cutting process, and extending the service life of the blade 3. In addition, the beveled blade 3 design can guide the fragments and dust generated when cutting the plasterboard 2 to one side or the rear to a certain extent, rather than flying towards the operator, thus protecting the operator to some extent. When cutting a chamfer, the blade 3 cuts through the plasterboard 2 to form a chamfer on the plasterboard 2. Then, the friction layer 31 on the blade 3 contacts the chamfer and grinds the chamfer surface, making the cut chamfer surface smoother.

[0044] Reference Figure 2 The scriber 4 is connected to an adjusting locking assembly 5 for simultaneously adjusting the positions of the two scribers 4. The adjusting locking assembly 5 includes a connecting rod 51 and a locking member 52. The locking member 52 includes a sliding plate 521, a snap-fit ​​member 523, and a connecting block 522. The sliding plate 521 is connected to the outside of the connection between the two support plates 1 and has a sliding groove 5211. The direction of the sliding groove 5211 is perpendicular to the straight line generated at the connection between the two support plates 1. The snap-fit ​​member 523 is an elastic block with a hexagonal cross-section. The sidewall edge of the sliding groove 5211 is toothed and matches the sidewall of the snap-fit ​​member 523. The snap-fit ​​member 523 is snapped into the sliding plate 521 through the sliding groove 5211. One end of the snap-fit ​​member 523 is connected to the connecting block 522. The width of the connecting block 522 is smaller than the narrowest part of the elastic block and the sliding groove 5211. One end of the connecting rod 51 is hinged to the connecting block 522, and the other end is hinged to the scriber 4.

[0045] When adjusting the position of the scriber 4, press down or pull up the locking piece 523. The locking piece 523 has a certain elasticity and slides along the sliding groove 5211 under manual force, thereby driving the connecting block 522 to slide. The connecting block 522 then drives the connecting rod 51 to move. The connecting rod 51 drives the scriber 4 to slide in the sliding groove 12, thereby causing the scriber 4 to slide back to the cutting position. After the scriber 4 is adjusted to the appropriate position, the side wall of the locking piece 523 abuts against the inner wall of the sliding groove 5211. The inner wall of the sliding groove 5211 limits the locking piece 523, so that the position of the locking piece 523 remains unchanged during the chamfering process.

[0046] Reference Figure 1Each support plate 1 has two rollers 6 that are rolled on it. The rollers 6 abut against the plasterboard 2 and roll in the same direction as the support plate 1. Each support plate 1 has a handle 7 attached to its outer side. When cutting the chamfer, the operator holds the handle 7 and pulls the support plate 1 along the cutting direction. The support plate 1 and the plasterboard 2 move relative to each other through the rollers 6, which reduces the friction generated when the support plate 1 moves, making it easier for the operator to cut the chamfer.

[0047] The implementation principle of the anti-cracking device for splicing gypsum board ceilings in this application embodiment is as follows: When cutting and chamfering, the rollers 6 connected to the support plate 1 abut against the two adjacent surfaces of the gypsum board 2 respectively. Then, the operator holds the handle 7 and pulls the support plate 1 along the cutting direction. Then, the scriber 4 abuts against the gypsum board 2 and passes through the part to be cut, making a groove of a certain depth on the gypsum board 2. Next, the blade 3 passes through the part to be cut and cuts the part that has already been grooved. During the cutting process, the scriber 4 makes a groove of a certain depth on the gypsum board 2 before the blade 3 cuts, so that the cut part of the gypsum board 2 is thinner and the strength of the cut part of the gypsum board 2 is reduced. Thus, during the cutting of the gypsum board 2, the risk of edge damage or breakage of the gypsum board 2 and the breakage of the blade 3 are reduced.

[0048] This application also discloses a method for preventing cracking during the splicing of gypsum board ceilings, referring to... Figure 3 This includes the following steps:

[0049] To cut the chamfer, the two adjacent surfaces of the plasterboard 2 are respectively attached to the rollers 6 on the two support plates 1. Then, the support plates 1 are pushed so that the scribing knife 4 gets closer to the plasterboard 2 before the blade 3. The scribing knife 4 abuts against the plasterboard 2 and passes through the part that needs to be cut, making a groove of a certain depth on the plasterboard 2. Then, the blade 3 passes through the part that needs to be cut and cuts the part that has already made the groove, thereby cutting a chamfer on the plasterboard 2.

[0050] The plasterboard 2, which has been cut and beveled, is spliced ​​together, and plaster 8 is filled between the grooves formed by two adjacent bevels.

[0051] For reinforcement, alkali-resistant mesh 9 is pressed into the joint of gypsum board 2, and then putty is applied.

[0052] When plaster 8 is filled into the grooves formed by the adjacent chamfers of plasterboard 2, the moisture in plaster 8 will penetrate into the pores of the chamfer surface, forming a certain bonding force with the two chamfer surfaces, thus making it less prone to cracking at the joint of adjacent plasterboard 2. At the same time, plaster 8 can fill the gaps between adjacent plasterboard 2, making the plasterboard 2 ceiling smoother. When the joint of adjacent plasterboard 2 is subjected to external forces, alkali-resistant mesh 9 disperses and bears the external stress, distributing it evenly across the entire surface, thereby improving the tensile strength and crack resistance of the joint of plasterboard 2. Furthermore, as a reinforcing material, alkali-resistant mesh 9 can form a strong bond at the joint, reducing the expansion and deepening of existing cracks. In addition, alkali-resistant mesh 9 has alkali resistance, effectively resisting the erosion of plaster 8 by alkaline substances, reducing the risk of alkaline substances penetrating into the interior of plaster 8, reducing damage to plaster 8, and further enhancing the crack resistance of the joint of adjacent plasterboard 2.

[0053] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A crack-prevention device for splicing gypsum board ceilings, characterized in that: It includes two support plates (1), which are vertically connected. The two support plates (1) are respectively attached to two adjacent surfaces of the gypsum board (2) to be cut. A blade (3) and a slicing knife (4) are provided between the inner sides of the two support plates (1). One end of the blade (3) is connected to the support plate (1) and the other end is connected to the other support plate (1). The slicing knife (4) is connected to the support plate (1) and is used to contact the part of the gypsum board (2) to be cut. The slicing knife (4) is located at the front end of the blade (3). The slicing blade (4) is connected to an adjusting locking assembly (5) for simultaneously adjusting the positions of the two slicing blades (4). The adjusting locking assembly (5) includes a connecting rod (51) and a locking member (52). One end of the connecting rod (51) is hinged to the slicing blade (4), and the other end is connected to the locking member (52). The locking member (52) is used to adjust the position of the connecting rod (51) and lock the connecting rod (51). The locking member (52) includes a sliding plate (521), which is connected to the support plate (1) and has a sliding groove (5211). One end of the connecting rod (51) is hinged to a connecting block (522), which is slidably connected to the sliding plate (521) through the sliding groove (5211). A snap-fit ​​member (523) is provided between the connecting block (522) and the sliding groove (5211), and the snap-fit ​​member (523) is snapped to the sliding plate (521) through the sliding groove (5211). The snap-fit ​​component (523) is an elastic block, and the sidewall edge shape of the sliding groove (5211) is a tooth shape that matches the sidewall of the snap-fit ​​component (523); The cross-sectional dimension of the blade (3) at the end near the slicing knife (4) is smaller than the cross-sectional dimension of the blade (3) at the end away from the slicing knife (4), and the cross-sectional dimension of the blade (3) is larger as the blade (3) is further away from the slicing knife (4).

2. The anti-cracking device for gypsum board ceiling splicing according to claim 1, characterized in that: The support plate (1) has a through groove (11) extending in a direction perpendicular to the straight line formed at the connection of the two support plates (1). The two ends of the blade (3) are connected to the support plate (1) through the through groove (11).

3. The anti-cracking device for gypsum board ceiling splicing according to claim 2, characterized in that: The support plate (1) is provided with a sliding groove (12), the opening direction of the sliding groove (12) is parallel to the opening direction of the through groove (11) on the same support plate (1), and the scribing blade (4) is slidably connected to the support plate (1) through the sliding groove (12).

4. The anti-cracking device for gypsum board ceiling splicing according to claim 1, characterized in that: The blade (3) has a friction layer (31) on the side that contacts the gypsum board (2).

5. The anti-cracking device for gypsum board ceiling splicing according to claim 1, characterized in that: Rollers (6) are rolled on the support plate (1). The rollers (6) abut against the gypsum board (2) and roll in the same direction as the support plate (1).

6. A method for preventing cracking during splicing of gypsum board ceilings, based on the anti-cracking device for splicing gypsum board ceilings according to any one of claims 1-5, characterized in that, Includes the following steps: Cut the chamfer, attach the two adjacent sides of the plasterboard (2) to the two support plates (1) respectively, and then push the support plates (1) so that the scribing knife (4) gets closer to the plasterboard (2) than the blade (3). The scribing knife (4) abuts against the plasterboard (2) and passes through the part that needs to be cut, making a groove of a certain depth on the plasterboard (2). Then the blade (3) passes through the part that needs to be cut and cuts the part that has been grooved. Splicing: The cut and chamfered gypsum boards (2) are spliced ​​together, and plaster (8) is filled between the grooves formed by two adjacent chamfers. For reinforcement, alkali-resistant mesh (9) is pressed into the joint of the gypsum board (2), and then putty is applied.

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