Gypsum cloth double-sided coating equipment

Abstract

The invention relates to the technical field of gypsum coating, and discloses gypsum cloth double-sided coating equipment which comprises a base, and the upper surface of the base is fixedly connected with a slurry box and a double-sided hot air dryer. The upper surface of the base is fixedly connected with two first mounting frames, two second mounting frames and two third mounting frames which are symmetrical with the base as the center. A driving roller, an upper scraping roller and a lower scraping roller are rotationally connected between the two second mounting frames, an upper feeding roller and a lower feeding roller are rotationally connected between the two first mounting frames, an upper discharging roller and a lower discharging roller are rotationally connected between the two third mounting frames, and a pressing roller is rotationally connected to the inner wall of the slurry box. The gypsum cloth double-sided coating equipment can effectively solve the problems that in the prior art, the surface of base cloth is rapidly hardened, internal moisture is retained, and internal and external shrinkage difference is formed, so that gypsum cloth slightly deforms in the drying and curing process, and the using effect of the gypsum cloth is affected.

Description

Technical Field

[0001] This invention relates to the field of gypsum coating technology, and more specifically to a double-sided gypsum cloth coating device. Background Technology

[0002] Plaster cloth is a fibrous fabric (such as cotton or fiberglass) impregnated or coated with plaster powder. After curing, it forms a rigid support structure and is mainly used for medical fixation (such as fracture splints) or construction molds. In the production process of plaster cloth, the base fabric is usually controlled to enter the production line at a uniform speed by unwinding equipment. It is then flattened and transported to the coating area by guide rollers, where the base fabric is completely immersed in plaster slurry, allowing both sides to absorb the slurry simultaneously. Subsequently, symmetrical extrusion rollers are positioned above and below the base fabric to extrude the base fabric from both sides, removing excess slurry and achieving uniform coating on both sides. Double-sided coating ensures that the plaster layer is evenly distributed on both sides of the base fabric, forming symmetrical mechanical support, reducing stress concentration on one side, and significantly enhancing the tensile and bending properties of the plaster cloth.

[0003] Currently, in the process of double-sided coating of gypsum cloth, a rotating scraper is usually used to scrape off excess slurry from the surface of the base cloth, and the evenly coated base cloth is fed into a double-sided hot air dryer at a constant speed. Hot air is blown on both the top and bottom of the base cloth at the same time to accelerate the drying and curing of the gypsum slurry. However, because the gypsum slurry on the upper and lower surfaces is subjected to higher heat intensity, the surface of the base cloth hardens rapidly while the internal moisture is retained, forming a difference in shrinkage between the inside and outside. This causes slight deformation of the gypsum cloth during the drying and curing process, affecting the performance of the gypsum cloth. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a double-sided gypsum cloth coating device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a double-sided gypsum cloth coating device, comprising: The base has a slurry box and a double-sided hot air dryer fixedly connected to its upper surface, and two first mounting brackets, two second mounting brackets and two third mounting brackets symmetrical about the base are fixedly connected to its upper surface. A drive roller, an upper scraper roller, and a lower scraper roller are rotatably connected between the two second mounting frames, an upper feed roller and a lower feed roller are rotatably connected between the two first mounting frames, an upper discharge roller and a lower discharge roller are rotatably connected between the two third mounting frames, and a pressure roller is rotatably connected to the inner wall of the slurry box. A fixing frame is fixedly connected to the upper surface of the base. Two sets of telescopic components are provided between the fixing frame and the base. One set of telescopic components is fixedly connected to the top of the inner wall of the fixing frame, and the other set of telescopic components is fixedly connected to the upper surface of the base. The telescopic ends of the two sets of telescopic components are respectively fixedly connected to pressure plates.

[0006] Furthermore, the telescopic component includes a guide cylinder and a guide rod. The top end of one set of guide cylinders is fixedly connected to the top of the inner wall of the fixing frame, and the bottom end of another set of guide cylinders is fixedly connected to the upper surface of the base. The guide rod is slidably connected inside the guide cylinder.

[0007] Furthermore, a strong spring is fixedly connected between the guide rod and the guide cylinder.

[0008] Furthermore, the inner wall of the fixing frame is rotatably connected to two shafts, and each of the two shafts has an elliptical ring fixedly connected to its outer circumference. Each of the two pressing plates has an extrusion wheel rotatably connected to its opposite side.

[0009] Furthermore, a first upper gear is fixedly connected to one end of the upper feed roller, a first lower gear is fixedly connected to one end of the lower feed roller, a second upper gear is fixedly connected to one end of the upper scraper roller, a second lower gear is fixedly connected to one end of the lower scraper roller, a third upper gear is fixedly connected to one end of the upper discharge roller, and a third lower gear is fixedly connected to one end of the lower discharge roller.

[0010] Furthermore, a transmission gear is fixedly connected to one end of each of the two shafts, and a transmission belt is sleeved between the two transmission gears.

[0011] Furthermore, a first driving gear and a second driving gear are fixedly connected to the outer circumference of the drive roller, and a first driven gear is fixedly connected to the outer circumference of both the feed roller and the scraper roller. A first transmission belt is sleeved between the two first driven gears and the first driving gear. A second driven gear is fixedly connected to the outer circumference of both the discharge roller and the shaft located below, and a second transmission belt is sleeved between the two second driven gears.

[0012] Furthermore, a drive motor is fixedly connected to the outer surface of the second mounting bracket, and the drive shaft of the drive motor is fixedly connected to the drive roller.

[0013] The technical solution provided by this invention has the following advantages compared with the prior art: This invention, guided by a guide cylinder and guide rod, causes an upper elliptical ring to push an upper extrusion wheel and an upper pressure plate vertically downwards, while a lower elliptical ring pushes a lower extrusion wheel and a lower pressure plate vertically upwards. This continues until the two pressure plates press against the upper and lower surfaces of the base fabric. The pressure plates apply uniform pressure to the deformed areas of the base fabric, forcing the gypsum layer to re-adhere to the base fabric, thus offsetting the internal stress caused by uneven shrinkage. Simultaneously, the pressing action of the two pressure plates allows some of the raised material of the gypsum fabric to flow and fill the recessed areas, achieving a smooth surface and improving the performance of the gypsum fabric. This overcomes slight surface deformation of the gypsum fabric, thereby improving its surface quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper and lower discharge rollers in an embodiment of the present invention; Figure 3 This is a schematic diagram of the upper and lower scraping rollers in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first transmission belt and the second transmission belt in an embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure plate structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the elliptical ring structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the powerful spring in an embodiment of the present invention.

[0016] The labels in the diagram represent: 1. Base; 11. Slurry box; 12. Double-sided hot air dryer; 13. First mounting frame; 14. Second mounting frame; 15. Third mounting frame; 2. Drive roller; 21. Upper feed roller; 22. Lower feed roller; 23. Upper scraper roller; 24. Lower scraper roller; 25. Upper discharge roller; 26. Lower discharge roller; 27. Pressure roller; 3. Fixed frame; 31. Telescopic component; 32. Press plate; 4. Guide cylinder; 41. Guide rod; 42. 5. Strong spring; 6. Shaft; 7. Elliptical ring; 8. Extrusion wheel; 9. First upper gear; 10. First lower gear; 11. Second upper gear; 12. Second lower gear; 13. Third upper gear; 14. Third lower gear; 15. Third lower gear; 16. Transmission gear; 17. Transmission belt; 18. First driving gear; 19. First driven gear; 20. First transmission belt; 10. Second driving gear; 11. Second driven gear; 12. Second transmission belt; 13. Drive motor. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] Example: Please see Figure 1 - Figure 7 This invention provides a technical solution: a double-sided gypsum cloth coating device, comprising: The base 1 has a slurry box 11 and a double-sided hot air dryer 12 fixedly connected to its upper surface. The upper surface of the base 1 is also fixedly connected to two first mounting brackets 13, two second mounting brackets 14 and two third mounting brackets 15 symmetrical about the base 1. A drive roller 2, a scraper upper roller 23, and a scraper lower roller 24 are rotatably connected between the two second mounting frames 14, a feed upper roller 21 and a feed lower roller 22 are rotatably connected between the two first mounting frames 13, a discharge upper roller 25 and a discharge lower roller 26 are rotatably connected between the two third mounting frames 15, and a pressure roller 27 is rotatably connected to the inner wall of the slurry box 11. A fixed frame 3 is fixedly connected to the upper surface of the base 1. Two sets of telescopic members 31 are provided between the fixed frame 3 and the base 1. One set of telescopic members 31 is fixedly connected to the top of the inner wall of the fixed frame 3, and the other set of telescopic members 31 is fixedly connected to the upper surface of the base 1. The telescopic ends of the two sets of telescopic members 31 are respectively fixedly connected to pressure plates 32.

[0020] The telescopic component 31 includes a guide cylinder 4 and a guide rod 41. The top end of one set of guide cylinders 4 is fixedly connected to the top of the inner wall of the fixed frame 3, and the bottom end of another set of guide cylinders 4 is fixedly connected to the upper surface of the base 1. The guide rod 41 is slidably connected inside the guide cylinder 4.

[0021] A strong spring 42 is fixedly connected between the guide rod 41 and the guide cylinder 4.

[0022] The inner wall of the fixed frame 3 is rotatably connected to two shafts 5, and elliptical rings 51 are fixedly connected to the outer circumference of the two shafts 5. Extrusion wheels 52 are rotatably connected to the opposite sides of the two pressure plates 32.

[0023] One end of the upper feed roller 21 is fixedly connected to a first upper gear 6, one end of the lower feed roller 22 is fixedly connected to a first lower gear 61, one end of the upper scraper roller 23 is fixedly connected to a second upper gear 62, one end of the lower scraper roller 24 is fixedly connected to a second lower gear 63, one end of the upper discharge roller 25 is fixedly connected to a third upper gear 64, and one end of the lower discharge roller 26 is fixedly connected to a third lower gear 65.

[0024] One end of each of the two shafts 5 is fixedly connected to a transmission gear 7, and a transmission belt 71 is sleeved between the two transmission gears 7.

[0025] The outer circumference of the drive roller 2 is fixedly connected with a first driving gear 8 and a second driving gear 83, respectively. The outer circumference of the feed roller 22 and the scraper roller 23 is fixedly connected with a first driven gear 81. A first transmission belt 82 is sleeved between the two first driven gears 81 and the first driving gear 8. The outer circumference of the discharge roller 26 and the shaft 5 located below is fixedly connected with a second driven gear 84. A second transmission belt 85 is sleeved between the two second driven gears 84.

[0026] A drive motor 9 is fixedly connected to the outer surface of the second mounting bracket 14, and the transmission shaft of the drive motor 9 is fixedly connected to the drive roller 2.

[0027] Working principle: The process of applying plaster cloth: In practical applications, such as Figure 1As shown, by passing one end of the base fabric sequentially between the upper feed roller 21 and the lower feed roller 22, the bottom of the pressure roller 27, between the upper scraper roller 23 and the lower scraper roller 24, the top of the drive roller 2, the double-sided hot air dryer 12, between the two pressure plates 32, and between the upper discharge roller 25 and the lower discharge roller 26, the base fabric forms a fixed path on the coating production line. By starting the drive motor 9, the drive motor 9 drives the drive roller 2 to rotate between the two second mounting brackets 14 through the transmission shaft. The drive roller 2 drives the first drive gear 8 and the second drive gear 83 on its outer circumference to rotate around its own axis. Figure 4 As shown, under the transmission action of the first transmission belt 82, the rotating first driving gear 8 drives the two first driven gears 81 to rotate through the first transmission belt 82. The two rotating first driven gears 81 respectively drive the feed lower roller 22 and the scraper upper roller 23 to rotate. Under the transmission action of the second transmission belt 85, the rotating second driving gear 83 drives the two second driven gears 84 to rotate through the second transmission belt 85. The two rotating second driven gears 84 respectively drive the discharge lower roller 26 and the shaft 5 located below to rotate.

[0028] The rotating feed roller 22 drives the first lower gear 61 at one end to rotate around its own axis. Under the meshing action of the first lower gear 61 and the first upper gear 6, the rotating first lower gear 61 drives the first upper gear 6 to rotate around the axis of the feed roller 21. The rotating first upper gear 6 drives the feed roller 21 to rotate around its own axis. The rotating scraper roller 23 drives the second upper gear 62 at one end to rotate around its own axis. Under the meshing action of the second upper gear 62 and the second lower gear 63, the rotating second upper gear 62 drives the scraper roller 23 to rotate around its own axis. Gear 62 drives the second lower gear 63 to rotate around the axis of the scraper lower roller 24. The rotating second lower gear 63 drives the scraper lower roller 24 to rotate around its own axis. The rotating discharge lower roller 26 drives the third lower gear 65 at one end to rotate around its own axis. Under the meshing action of the third lower gear 65 and the third upper gear 64, the rotating third lower gear 65 drives the third upper gear 64 to rotate around the axis of the discharge upper roller 25. The rotating third upper gear 64 drives the discharge upper roller 25 to rotate around its own axis. In addition, such as Figure 1 As shown, under the meshing transmission action of the transmission gear 7 and the transmission belt 71, the rotating lower shaft 5 drives the upper shaft 5 to rotate synchronously inside the fixed frame 3 through the transmission gear 7 and the transmission belt 71.

[0029] Under the rotation of the upper feed roller 21, lower feed roller 22, drive roller 2, upper discharge roller 25, and lower discharge roller 26, the base fabric passes between the upper feed roller 21 and lower feed roller 22. Then, guided by the pressure roller 27, the base fabric tilts into the slurry box 11. Since the slurry box 11 is filled with prepared gypsum slurry, both sides of the base fabric simultaneously absorb the slurry, forming a preliminary coating. Guided by the drive roller 2, the base fabric continues to move towards the drive roller 2 between the upper scraper roller 23 and lower scraper roller 24. When the base fabric is between the upper scraper roller 23 and lower scraper roller 24, under the rotation of the upper scraper roller 23 and lower scraper roller 24, the upper scraper roller 23 and lower scraper roller 24 simultaneously squeeze the base fabric on both the upper and lower sides to remove excess slurry. Furthermore, the scraped excess slurry can fall back into the slurry box 11, avoiding contamination of the equipment.

[0030] The process of flattening plaster cloth: In practical applications, after the base fabric moves above the drive roller 2, it continues to move towards the upper discharge roller 25 and the lower discharge roller 26. The base fabric passes sequentially between the double-sided hot air dryer 12 and between the two pressure plates 32. When the base fabric is in the heating position of the double-sided hot air dryer 12, hot air at 30 to 40 degrees Celsius is simultaneously delivered from the upper and lower air ducts of the double-sided hot air dryer 12. The hot air is obliquely blown at a 45-degree angle onto both the upper and lower surfaces of the base fabric, achieving synchronous drying and curing of the coating on both sides. When the base fabric is between the upper and lower pressure plates 32, the two rotating shafts 5 drive multiple elliptical rings 51 on their outer circumference to rotate around the axis of the shafts 5. Figure 6As shown, when the rotating elliptical ring 51 rotates from 0 to 90 degrees, under the guidance of the guide cylinder 4 and the guide rod 41, the upper set of rotating elliptical rings 51 pushes the upper extrusion wheel 52 and the upper pressure plate 32 to move vertically downward, while the lower set of rotating elliptical rings 51 pushes the lower extrusion wheel 52 and the lower pressure plate 32 to move vertically upward, until the upper and lower pressure plates 32 press against the upper and lower surfaces of the base fabric. The pressure plates 32 apply uniform pressure to the deformed areas of the base fabric, forcing the gypsum layer to re-adhere to the base fabric, offsetting the internal stress caused by uneven shrinkage. At the same time, through the extrusion action of the two pressure plates 32, some of the protruding material of the gypsum cloth can flow to fill the concave areas, achieving a smooth surface and thus improving the performance of the gypsum cloth. When the rotating elliptical ring 51 rotates from 90 to 180 degrees, the pressure of the elliptical ring 51 on the extrusion wheel 52 and the pressure plate is released. The squeezing action of the pressure plate 32, under the elastic action of the strong spring 42 itself, causes the upper set of strong springs 42 to drive the upper guide rod 41 and the upper pressure plate 32 to move vertically upward, while the lower set of strong springs 42 drives the lower guide rod 41 and the lower pressure plate 32 to move vertically downward. During this process, the base fabric, after being flattened by the pressure plate 32, continues to move towards the upper discharge roller 25 and the lower discharge roller 26. Similarly, when the rotating elliptical ring 51 rotates from 180 degrees to 270 degrees, the upper and lower pressure plates 32 flatten the base fabric again. When the rotating elliptical ring 51 rotates from 270 degrees to 360 degrees, the upper and lower pressure plates 32 can separate from the base fabric again. In this way, by continuously flattening the cured base fabric through the upper and lower pressure plates 32, the slight deformation of the gypsum cloth surface can be overcome, thereby improving the surface quality of the gypsum cloth.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gypsum cloth double-sided coating device, comprising a base (1), characterized in that: the upper surface of the base (1) is fixedly connected with a slurry box (11) and a double-sided hot air dryer (12) respectively, and the upper surface of the base (1) is fixedly connected with two first mounting frames (13), two second mounting frames (14) and two third mounting frames (15) which are symmetrically centered on the base (1); the driving roller (2), the upper scraping roller (23) and the lower scraping roller (24) are rotatably connected between the two second mounting frames (14) respectively, the upper feeding roller (21) and the lower feeding roller (22) are rotatably connected between the two first mounting frames (13) respectively, the upper discharging roller (25) and the lower discharging roller (26) are rotatably connected between the two third mounting frames (15) respectively, and the inner wall of the slurry box (11) is rotatably connected with a compression roller (27); the upper surface of the base (1) is fixedly connected with a fixed frame (3), and two groups of telescopic members (31) are arranged between the fixed frame (3) and the base (1), one group of the telescopic members (31) is fixedly connected to the top of the inner wall of the fixed frame (3), the other group of the telescopic members (31) is fixedly connected to the upper surface of the base (1), and the telescopic ends of the two groups of telescopic members (31) are fixedly connected with flattening plates (32) respectively.

2. A gypsum cloth double-sided coating apparatus according to claim 1, characterized in that: The telescopic member (31) comprises a guide cylinder (4) and a guide rod (41), the top end of one group of the guide cylinders (4) is fixedly connected to the top of the inner wall of the fixed frame (3), the bottom end of the other group of the guide cylinders (4) is fixedly connected to the upper surface of the base (1), and the guide rod (41) is slidingly connected in the interior of the guide cylinder (4).

3. A gypsum cloth double-sided coating apparatus according to claim 2, characterized in that: The guide rod (41) and the guide cylinder (4) are fixedly connected with a strong spring (42).

4. A gypsum cloth double-sided coating apparatus according to claim 1, characterized in that: The inner wall of the fixed frame (3) is rotatably connected with two shaft rods (5), the circumferential outer surfaces of the two shaft rods (5) are fixedly connected with elliptical rings (51), and the sides away from each other of the two flattening plates (32) are rotatably connected with extrusion wheels (52).

5. A gypsum cloth double-sided coating apparatus according to claim 1, characterized in that: One end of the upper feeding roller (21) is fixedly connected with a first upper gear (6), one end of the lower feeding roller (22) is fixedly connected with a first lower gear (61), one end of the upper scraping roller (23) is fixedly connected with a second upper gear (62), one end of the lower scraping roller (24) is fixedly connected with a second lower gear (63), one end of the upper discharging roller (25) is fixedly connected with a third upper gear (64), and one end of the lower discharging roller (26) is fixedly connected with a third lower gear (65).

6. A gypsum cloth double-sided coating apparatus according to claim 4, characterized in that: One end of each of the two shaft rods (5) is fixedly connected with a transmission gear (7), and a transmission gear belt (71) is drivingly sleeved between the two transmission gears (7).

7. A gypsum cloth double-sided coating apparatus according to claim 4, characterized in that: The circumferential outer surface of the driving roller (2) is fixedly connected with a first driving gear (8) and a second driving gear (83), respectively, the circumferential outer surface of the feeding lower roller (22) and the material scraping upper roller (23) is fixedly connected with a first driven gear (81), and two first driven gears (81) are transmissionally sleeved with a first transmission belt (82) between the first driving gear (8).

8. A gypsum cloth coating apparatus according to claim 1, wherein: The outer surface of the second mounting frame (14) is fixedly connected with a driving motor (9), and the transmission shaft of the driving motor (9) is fixedly connected with the driving roller (2).

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