A device for sanding the surface of a gypsum board

Abstract

The application discloses a paper-faced gypsum board surface sanding device, which comprises a sanding unit and a dust removal unit. The sanding unit is arranged above a conveying rack and is used for grinding the surface of the paper-faced gypsum board. Symmetrical supports are arranged on the two sides of the conveying rack. The sanding unit comprises an upper sanding drum and a lower sanding drum which are rotatably connected to the supports and are tensioned by a sand belt. The dust removal unit is arranged above the conveying rack and is located downstream of the sanding unit. The dust removal unit comprises a dust suction cylinder. Limiting wheel sets are connected to the supports by support rods. The limiting wheel sets comprise front limiting wheels and rear limiting wheels which are equidistantly connected to the circumferential sides of the support rods. The sand belt is used in cooperation with the upper sanding drum and the lower sanding drum to sand the surface of the gypsum board, so that the flatness of the board surface is improved. Meanwhile, the limiting wheel sets are used to limit the transmission process of the sand belt, so that the deviation of the sand belt relative to the middle part of the gypsum board is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of paper-faced gypsum board manufacturing equipment, specifically to a paper-faced gypsum board surface sanding device. Background Technology

[0002] Before paper-faced gypsum board is formed, it is a gypsum slurry that solidifies during the flow process. The unevenness of the gypsum board surface after forming is manifested at the microscopic level as paper surface protrusions caused by gypsum particles, which leads to the problem of poor surface flatness of the gypsum board. The flatness of the paper-faced gypsum board surface can be adjusted by sanding with a sanding device. After sanding, the surface flatness error can be reduced to less than 0.1mm, and high-gloss film can be successfully applied to the surface.

[0003] The existing sanding process for paper-faced gypsum board mainly involves the paper-faced gypsum board placed on a conveyor system moving forward under the drive of the conveyor belt, passing through the sanding unit and brush roller in sequence to complete the longitudinal sanding and cleaning process of the paper-faced gypsum board surface, and outputting a paper-faced gypsum board with a smooth and flat surface; however, this process is prone to practical problems such as debris accumulation, cheap sanding belts, and debris scattering during the sanding of gypsum board.

[0004] Therefore, there is a need to provide a sanding device for paper-faced gypsum board to solve the problems of poor flatness of gypsum board surface after sanding, easy deviation of sanding belt relative to gypsum board, and easy dispersion of sanding dust in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a sanding device for paper-faced gypsum board to solve the problems in the prior art, such as poor flatness of the gypsum board surface after sanding, easy deviation of the sanding belt relative to the gypsum board, and easy dispersion of dust generated by sanding.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] In a first aspect of the invention, a sanding device for paper-faced gypsum board is provided, comprising: a sanding unit disposed above a conveyor frame for sanding the surface of the paper-faced gypsum board; supports symmetrically arranged on both sides of the conveyor frame; the sanding unit includes an upper sanding drum and a lower sanding drum rotatably connected to the supports; the upper sanding drum is disposed parallel above the lower sanding drum; the upper and lower sanding drums are tensioned by a sanding belt, so that while the lower sanding drum is driven by a power motor, the tensioning effect of the sanding belt on the upper sanding drum causes it to rotate in the same direction; a dust removal unit... The unit, located above the conveyor frame, is used to remove dust from the surface of the paper-faced gypsum board. The dust removal unit is located downstream of the sanding unit and includes a dust suction cylinder with its opening facing the contact gap between the sanding belt and the gypsum board. The support is equipped with a set of limiting wheels connected by a support rod. The set of limiting wheels includes a front limiting wheel and a rear limiting wheel, which are equidistantly axled to the periphery of the support rod. The front limiting wheel and the rear limiting wheel correspond to the two sides of the sanding belt, so that the sanding belt can be limited by the front limiting wheel and the rear limiting wheel together during transmission.

[0008] Furthermore, symmetrically arranged limiting rings are fitted at both ends of the sand-drying drum, and the limiting rings rotate together with the sand-drying drum; wherein, the outer edge of the end face of the limiting ring near the end of the sand-drying drum extends radially outward to form a limiting outer edge that limits the side of the gypsum board; the outer edge of the other end of the limiting ring contracts radially inward to form a limiting inner edge that limits the side of the sanding belt, and the thickness of the limiting inner edge is equal to the thickness of the sanding belt.

[0009] Furthermore, the limiting outer edge has a conical structure with its small-diameter end fixed on the lower sand rotating drum, and the large-diameter end of the limiting outer edge gradually extends along its axial direction to approach the support, so that the gypsum board that tilts during the conveying process will straighten when it touches the conical wall.

[0010] Furthermore, the limiting ring is rotatably connected to the lower sand drum via a bearing, so that the limiting ring remains relatively stationary when the lower sand drum rotates; wherein, the side wall of the outer edge of the limiting ring is provided with a protrusion in the circumferential direction that can contact the side of the gypsum board, thereby increasing the friction between the outer edge of the limiting ring and the side of the gypsum board.

[0011] Furthermore, a guide roller is provided on the conveyor frame. The guide roller is located upstream of the sanding unit and is used to limit the longitudinal displacement of the conveyed gypsum board.

[0012] Furthermore, the opening end of the vacuum cleaner is provided with a scraper that contacts the surface of the gypsum board being transported. The scraper is used to scrape off the debris attached to the surface of the gypsum board. The scraper includes a curved plate whose arc surface is tangent to the wall of the vacuum cleaner. The inner arc surface of the curved plate faces the lower rotating cylinder, so as to form a guiding airflow on the inner arc surface of the curved plate to guide the debris into the vacuum cleaner.

[0013] Furthermore, the conveyor frame is equipped with a transverse air knife, which is located upstream of the sanding unit. The air knife's outlet faces the contact gap between the sanding belt and the plasterboard, thereby allowing the debris accumulated at the contact gap between the sanding belt and the plasterboard to be blown away.

[0014] Furthermore, the two ends of the air knife are hinged to the transmission frame, thereby allowing the position of the air knife's outlet to be changed.

[0015] Furthermore, the end of the air knife extends out as a baffle and is fixedly connected to the transmission frame by a tension spring.

[0016] Furthermore, the shaft end of the guide roller is provided with a linkage plate that can be linked with the baffle. The linkage plate has a wedge-shaped end, thereby enabling the air knife to have the following two working conditions:

[0017] First working condition: When the guide rod is not in contact with the plasterboard, the guide rod is stationary and the tension spring is in its natural state, pulling the air knife so that the air outlet of the air knife faces the sanding belt.

[0018] Second working condition: When the guide rod contacts the plasterboard, the guide rod rotates counterclockwise, and the wedge-shaped end of the linkage plate intermittently pushes against the air knife, causing the air knife to oscillate periodically, so that the air outlet of the air knife can intermittently blow air at the contact gap between the sanding belt and the plasterboard.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention uses a sanding belt in conjunction with an upper and lower sanding drum to sand the paper surface of gypsum board, improving the flatness of the board surface. At the same time, a set of limiting wheels limits the transmission process of the sanding belt, reducing its deviation relative to the center of the gypsum board. Meanwhile, the debris generated during the sanding process can be cleaned up in time by the dust collection tube in the dust removal unit, preventing dust from spreading to the surrounding area. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a paper-faced gypsum board surface sanding device provided by the present invention;

[0023] Figure 2 for Figure 1 Another view;

[0024] Figure 3 for Figure 1 Enlarged view of section I;

[0025] Figure 4 for Figure 1 Enlarged view of section II;

[0026] Figure 5 This is a schematic diagram of the structure of the air knife in one embodiment of the present invention;

[0027] Figure 6 for Figure 5 Enlarged view of section III;

[0028] Figure 7 This is a schematic diagram of the structure of the limiting ring sleeve in one embodiment of the present invention;

[0029] Figure 8 for Figure 7 Schematic diagram showing the relative positions of the middle limiting ring, the sanding belt, and the gypsum board;

[0030] Figure 9 for Figure 8 Enlarged view of section IV;

[0031] Figure 10 This is a schematic diagram of the structure of the limiting ring in another embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the limiting ring in another embodiment of the present invention;

[0033] Figure 12 for Figure 11 A partial sectional view;

[0034] Figure 13 This is a schematic diagram of the structure of a vacuum cleaner cylinder in one embodiment of the present invention;

[0035] Figure 14 for Figure 13 Enlarged view of CV;

[0036] Figure 15 This is a 3D structural diagram of a vacuum cleaner cylinder.

[0037] The labels in the diagram represent the following:

[0038] 10. Sanding unit; 11. Conveyor frame; 111. Support; 112. Support rod; 12. Upper sanding drum; 13. Lower sanding drum; 131. Limiting ring; 132. Limiting outer edge; 133. Limiting inner edge; 134. Protrusion; 14. Sanding belt; 15. Limiting wheel assembly; 151. Front limiting wheel; 152. Rear limiting wheel; 16. Guide roller; 161. Linkage plate; 20. Dust removal unit; 21. Dust suction cylinder; 22. Scraper; 221. Bending plate; 23. Air knife; 231. Tension spring; 232. Baffle. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1-3 As shown, the present invention provides a sanding device for the surface of paper-faced gypsum board, a sanding unit 10, which is disposed above a conveyor frame 11 for grinding the surface of paper-faced gypsum board. Supports 111 are symmetrically arranged on both sides of the conveyor frame 11. The sanding unit 10 includes an upper sanding drum 12 and a lower sanding drum 13 rotatably connected to the support 111. The upper sanding drum 12 is arranged parallel above the lower sanding drum 13. The upper sanding drum 12 and the lower sanding drum 13 are tensioned by a sanding belt 14, so that while the lower sanding drum 13 is driven by a power motor, the upper sanding drum 12 is driven to rotate in the same direction by the tensioning effect of the sanding belt 14.

[0041] The dust removal unit 20 is located above the conveyor frame 11 and is used to remove dust from the surface of the paper-faced gypsum board. The dust removal unit 20 is located downstream of the sanding unit 10. The dust removal unit 20 includes a dust suction cylinder 21, the opening of which faces the contact gap between the sanding belt 14 and the gypsum board.

[0042] The support 111 is provided with a limiting wheel group 15 connected by a support rod 112. The limiting wheel group 15 includes a front limiting wheel 151 and a rear limiting wheel 152. The front limiting wheel 151 and the rear limiting wheel 152 are equidistantly shafted to the periphery of the support rod 112. The front limiting wheel 151 and the rear limiting wheel 152 correspond to the two sides of the sanding belt 14, so that the sanding belt 14 can be limited by the front limiting wheel 151 and the rear limiting wheel 152 during the transmission process.

[0043] The present invention aims to sand the paper surface of gypsum board by using the sanding belt 14 in conjunction with the upper sanding drum 12 and the lower sanding drum 13 to improve the flatness of the board surface. At the same time, the limiting wheel set 15 is used to limit the transmission process of the sanding belt 14 to reduce its deviation relative to the center of the gypsum board. Meanwhile, the debris generated during the sanding process can also be cleaned up in time by the dust collection cylinder 21 in the dust removal unit 20 to prevent dust from spreading to the surrounding area.

[0044] To limit the movement of the plasterboard being sanded and prevent it from deviating when in contact with the conveyor belt 14, such as... Figure 4As shown, in the preferred embodiment provided by the above embodiments of the present invention, the two ends of the sand-feeding drum 13 are respectively fitted with symmetrically arranged limiting rings 131, and the limiting rings 131 rotate together with the sand-feeding drum 13.

[0045] Please continue reading. Figure 7-9 Among them, the outer edge of the end face of the limiting ring 131 near the end of the lower sand rotating cylinder 13 extends radially outward to form a limiting outer edge 132 that limits the side of the gypsum board.

[0046] The outer edge of the other end of the limiting ring 131 contracts radially inward to form a limiting inner edge 133 that limits the side of the sand belt 14. The thickness of the limiting inner edge 133 is equal to the thickness of the sand belt 14.

[0047] In this embodiment, the limiting ring 131 simultaneously limits the side of the sanding belt 14 and the side wall of the transported gypsum board, preventing relative displacement between them during transmission. It is important to note that during transmission, the edge of the gypsum board is tightly against the lower peripheral wall of the limiting inner edge 133, with a small gap between the side wall of the gypsum board and one annular surface of the limiting ring 131. The limiting ring 131 is made entirely of a flexible material, such as soft rubber, which will first compress the gypsum board when its transmission position shifts laterally. The limiting ring 131 on one side causes the limiting ring 131 to elastically deform towards the limiting outer edge 132, and then forces the limiting inner edge 133 to offset equidistantly with the limiting ring 131. At this time, since the sanding belt 14 loses the limiting effect of the limiting inner edge 133, it will deflect the same distance towards the limiting outer edge 13 with the gypsum board, thereby achieving synchronous deflection between the sanding belt 14 and the gypsum board being transported, ensuring the overall sanding effect of the gypsum board paper surface and improving the overall flatness of the board surface.

[0048] To prevent excessive deviation in the transmission direction of the gypsum board, which could cause the edge of the gypsum board to fail to align with the edge of the limiting ring 131, such as... Figure 10 As shown, in the preferred embodiment provided by the above embodiments, the limiting outer edge 132 has a conical structure with its small diameter end fixed on the lower sand rotating drum 13, and the large diameter end of the limiting outer edge 132 gradually extends along its axial direction to approach the support 111, so that the gypsum board that tilts during the conveying process will straighten when it touches the conical wall.

[0049] In this embodiment, the conical limiting outer edge 132 structure allows the gypsum board with a large tilt angle to be guided back to the correct position by the conical inclined surface of the limiting outer edge 132 before entering the area below the sand-drying drum 13. It should be noted that the limiting outer edge 132 is generally made of a material that is not easily deformed, such as hard rubber, steel, aluminum alloy, etc.

[0050] To slow down the speed of the gypsum board as it passes under the lower sanding drum 13, thereby increasing the sanding time of the gypsum board, such as... Figure 11-12 As shown, in another embodiment of the present invention, the limiting ring 131 is rotatably connected to the lower sand drum 13 via a bearing, so that the limiting ring 131 remains relatively stationary when the lower sand drum 13 rotates.

[0051] The outer edge 132 of the limiting edge is provided with a protrusion 134 on the side wall that can contact the side of the gypsum board, thereby increasing the friction between the outer edge 132 of the limiting edge and the side of the gypsum board.

[0052] In this embodiment, the edge of the gypsum board being transported is tightly attached to the periphery of the limiting ring 131, thereby driving the limiting ring 131 to rotate as a whole. Due to the existence of rotational resistance, the linear speed of the gypsum board during transport can be reduced, increasing the sanding time of the board surface. It should be noted that the thickness of the sanding belt 14 provided in this embodiment should be slightly greater than the circumferential width of the inner edge 133 of the limiting ring, so that the sanding belt 14 can sand the surface of the gypsum board.

[0053] To stabilize the position of the gypsum board and reduce its longitudinal movement during transport, such as Figure 1 , 4 As shown, in another embodiment of the present invention, a guide roller 16 is provided on the transmission frame 11. The guide roller 16 is located upstream of the sanding unit 10 and is used to limit the longitudinal displacement of the conveyed gypsum board.

[0054] To facilitate the absorption of scraped debris from the gypsum board surface by negative pressure, such as Figure 13-15 As shown, the opening end of the dust collection cylinder 21 is provided with a scraper 22 that contacts the surface of the gypsum board being transported. The scraper 22 is used to scrape off the debris attached to the surface of the gypsum board.

[0055] The scraper 22 includes a curved plate 221 whose arc surface is tangent to the wall of the dust collection cylinder 21. The inner arc surface of the curved plate 221 faces the lower sand drum 13, so as to form a guiding wind on the inner arc surface of the curved plate 221 to guide the debris into the dust collection cylinder 21.

[0056] In this embodiment, the scraper 22, combined with the negative pressure suction of the vacuum tube 21, makes it easier to suck up debris, dust and other adhering substances on the surface of the gypsum board. Moreover, the inner arc surface of the curved plate 221 changes the airflow direction to form a guiding wind, which makes it easier to guide and collect small particles such as debris and dust into the vacuum tube 21, thereby improving the cleanliness of the gypsum board surface.

[0057] In order to clean up the debris accumulated upstream of the sanding unit 10 and prevent the accumulated debris from affecting the sanding effect, such as Figure 5-6As shown, in another embodiment of the present invention, a transverse air knife 23 is provided on the transmission frame 11. The air knife 23 is located upstream of the sanding unit 10, and the air outlet of the air knife 23 faces the contact gap between the sanding belt 14 and the plasterboard, so that the debris accumulated at the contact gap between the sanding belt 14 and the plasterboard can be blown away.

[0058] More specifically, the two ends of the air knife 23 are hinged to the transmission frame 11, thereby allowing the position of the air outlet of the air knife 23 to be changed.

[0059] More specifically, the end of the air knife 23 extends out to form a baffle 232 and is fixedly connected to the transmission frame 11 by a tension spring 231.

[0060] More specifically, the shaft end of the guide rod 16 is provided with a linkage plate 161 that can be linked with the baffle 232. The linkage plate 161 has a wedge-shaped end, thereby enabling the air knife 23 to have the following two working conditions:

[0061] First working condition: When the guide rod 16 is not in contact with the plasterboard, the guide rod 16 is stationary, and the tension spring 231 is in a natural state pulling the air knife 23, so that the air outlet of the air knife 23 faces the sanding belt 14.

[0062] Second working condition: When the guide rod 16 contacts the plasterboard, the guide rod 16 rotates counterclockwise, and the wedge-shaped end of the linkage plate 161 intermittently pushes the air knife 23, causing the air knife 23 to oscillate periodically, so that the air outlet of the air knife 23 can intermittently blow air to the contact gap between the sanding belt 14 and the plasterboard.

[0063] In this embodiment, through the linkage between the guide roller 16 and the air knife 23, the air knife 23 can use the transmission interval between adjacent gypsum boards to generate intermittent air blowing on the surface of the sanding belt 14, effectively preventing the sand particles on the sanding belt 14 from being filled with debris, which is beneficial to improving the sanding effect of the sanding belt 14.

[0064] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A sanding device for paper-faced gypsum board, characterized in that, include: A sanding unit (10) is located above a conveyor frame (11) for grinding the surface of a gypsum board. Supports (111) are symmetrically arranged on both sides of the conveyor frame (11). The sanding unit (10) includes an upper sanding drum (12) and a lower sanding drum (13) rotatably connected to the support (111). The upper sanding drum (12) is arranged parallel above the lower sanding drum (13). The upper sanding drum (12) and the lower sanding drum (13) are tensioned by a sanding belt (14), so that the lower sanding drum (13) is driven by a power motor, and the upper sanding drum (12) is driven to rotate in the same direction by the tensioning effect of the sanding belt (14). A dust removal unit (20) is located above the conveyor frame (11) for removing dust from the surface of the paper-faced gypsum board. The dust removal unit (20) is located downstream of the sanding unit (10). The dust removal unit (20) includes a dust suction cylinder (21) with the opening of the dust suction cylinder (21) facing the contact gap between the sanding belt (14) and the gypsum board. The support (111) is provided with a limiting wheel group (15) connected by a support rod (112). The limiting wheel group (15) includes a front limiting wheel (151) and a rear limiting wheel (152). The front limiting wheel (151) and the rear limiting wheel (152) are equidistantly axially connected to the periphery of the support rod (112). The front limiting wheel (151) and the rear limiting wheel (152) correspond to the two sides of the sanding belt (14), so that the sanding belt (14) can be limited by the front limiting wheel (151) and the rear limiting wheel (152) during transmission. The transmission frame (11) is provided with a transverse air knife (23). The air knife (23) is located upstream of the sanding unit (10). The air outlet of the air knife (23) is directed toward the contact gap between the sanding belt (14) and the gypsum board, so that the debris accumulated at the contact gap between the sanding belt (14) and the gypsum board can be blown away. The conveyor frame (11) is provided with a guide roller (16), which is located upstream of the sanding unit (10). The guide roller (16) is used to limit the longitudinal displacement of the conveyed gypsum board. The two ends of the air knife (23) are hinged to the transmission frame (11), thereby allowing the position of the air outlet of the air knife (23) to be changed; The end of the air knife (23) extends out of a baffle (232) and is fixedly connected to the transmission frame (11) by a tension spring (231); The guide rod (16) has a linkage plate (161) at its shaft end that can be linked with the baffle (232). The linkage plate (161) has a wedge-shaped end, so that the air knife (23) has the following two working conditions: First working condition: When the guide rod (16) is not in contact with the plasterboard, the guide rod (16) is stationary, and the tension spring (231) is in a natural state pulling the air knife (23) so that the air outlet of the air knife (23) faces the sanding belt (14). Second working condition: When the guide rod (16) comes into contact with the plasterboard, the guide rod (16) rotates counterclockwise, and the wedge-shaped end of the linkage plate (161) intermittently pushes against the air knife (23) to make the air knife (23) swing periodically, so that the air outlet of the air knife (23) can intermittently blow air to the contact gap between the sanding belt (14) and the plasterboard.

2. The paper-faced gypsum board surface sanding device according to claim 1, characterized in that, The two ends of the sand-feeding drum (13) are respectively fitted with symmetrically arranged limiting rings (131), and the limiting rings (131) rotate together with the sand-feeding drum (13). Wherein, the outer edge of the end face of the limiting ring (131) near the end of the lower sand drum (13) extends radially outward to form a limiting outer edge (132) that limits the side of the gypsum board. The outer edge of the other end of the limiting ring (131) contracts radially inward to form a limiting inner edge (133) that limits the side of the sand belt (14), and the thickness of the limiting inner edge (133) is equal to the thickness of the sand belt (14).

3. The paper-faced gypsum board surface sanding device according to claim 2, characterized in that, The limiting outer edge (132) has a conical structure with its small diameter end fixed on the lower sand rotating drum (13). The large diameter end of the limiting outer edge (132) gradually extends along its axial direction to approach the support (111), so that the gypsum board that tilts during the conveying process will straighten when it touches the conical wall.

4. The paper-faced gypsum board surface sanding device according to claim 2, characterized in that, The limiting ring (131) is rotatably connected to the lower sand drum (13) via a bearing, so that the limiting ring (131) remains relatively stationary when the lower sand drum (13) rotates. The outer edge of the limiting edge (132) has a protrusion (134) on its side wall that can contact the side of the gypsum board, thereby increasing the friction between the outer edge of the limiting edge (132) and the side of the gypsum board.

5. A sanding device for paper-faced gypsum board surface according to claim 1 or 3, characterized in that, The opening end of the vacuum tube (21) is provided with a scraper (22) that contacts the surface of the gypsum board being transported. The scraper (22) is used to scrape off the debris attached to the surface of the gypsum board. The scraper (22) includes a curved plate (221) whose arc surface is tangent to the wall of the dust collection cylinder (21). The inner arc surface of the curved plate (221) faces the lower sand drum (13) to form a guiding wind on the inner arc surface of the curved plate (221) to guide the debris into the dust collection cylinder (21).

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