Soft porcelain production cutting device with adjusting function

Abstract

The invention discloses a soft porcelain production cutting device with an adjusting function, and relates to the technical field of soft porcelain cutting, the soft porcelain production cutting device comprises a cutting frame, the inner wall of the cutting frame is fixedly connected with a material carrying plate, and the material carrying plate is used for placing a soft porcelain plate; the distance adjusting cutting mechanism is arranged above the material carrying plate, and the distance adjusting cutting mechanism is used for transversely cutting off the multiple sets of long strips at equal intervals while longitudinally cutting the soft porcelain plate into the multiple sets of long strips at equal intervals; and the adsorption assembly is arranged below the material carrying plate, and the adsorption assembly is used for adsorbing the soft porcelain plate to the top surface of the material carrying plate and collecting chippings generated by cutting the soft porcelain plate, so that the device is beneficial to quickly cutting the soft porcelain plate into rectangular soft ceramic tiles with the same size, and the cutting efficiency is improved. And the cutting efficiency can be improved while it can be ensured that the sizes of the cut flexible tiles are consistent.

Description

Technical Field

[0001] The invention relates to the technical field of soft porcelain cutting, and in particular to a soft porcelain production and cutting device with an adjustment function. Background Art

[0002] Soft ceramics are a new type of building decoration material. They use inorganic modified clay MCM as the main raw material and are formed, baked, and irradiated and cross-linked through a special temperature-controlled molding system. Soft ceramic tiles are a common type of soft ceramics. The difference between soft ceramic tiles and traditional ceramic tiles is their texture. Soft ceramic tiles are soft and feel like cowhide. They have prominent patterns and a strong three-dimensional sense. Soft ceramic tiles mainly add flexible elements to ceramic tiles, changing the cold and hard texture of traditional ceramic tiles, making them more flexible and warmer. When cutting existing soft ceramic tiles, a person usually needs to use a cutting knife to cut the soft ceramic plate into multiple groups of long strips, and then cut the multiple groups of long strips at equal distances, so that the soft ceramic plate is produced and cut into multiple rectangular soft ceramic tiles of the same size. In this process, the process of cutting the soft ceramic plate into soft ceramic tiles is cumbersome and complicated, which not only makes it easy for the cut soft ceramic tiles to have different sizes, but also has extremely low efficiency for multiple cuttings, making it difficult to meet the mass production and cutting needs of soft ceramic plates. In view of this, the present invention proposes a soft porcelain production cutting device with an adjustment function to make up for and improve the deficiencies of the prior art. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: a soft porcelain production cutting device with an adjustment function, comprising a cutting frame, the inner wall of the cutting frame is fixedly connected with a carrier plate, and the carrier plate is used to place the soft porcelain plate. A soft porcelain production cutting device with an adjustment function includes: The adjustable cutting mechanism is arranged above the carrier plate, and is used to cut the soft ceramic plate into multiple groups of strips at equal distances in the longitudinal direction, and to cut the multiple groups of strips at equal distances in the transverse direction; The adsorption component is arranged below the carrier plate and is used to adsorb the soft ceramic plate to the top surface of the carrier plate and collect the debris generated by cutting the soft ceramic plate.

[0004] Preferably, the adjustable distance cutting mechanism includes a servo motor installed on the outer surface of the cutting frame, the output end of the servo motor is fixedly connected to a spline shaft, the outer surface of the spline shaft is equidistantly splined to a spline sleeve, the outer surface of any spline sleeve is fixedly connected to a tool carrier through a bearing, the inner wall of the tool carrier is rotatably connected to a cutting auxiliary knife, the outer surface of the cutting auxiliary knife is fixedly connected to a supply and transfer disk, a first belt is transmission-connected between the supply and transfer disk and the spline sleeve, and the end of the spline shaft away from the servo motor is fixedly connected to a main bevel gear.

[0005] Preferably, the adjustable distance cutting mechanism also includes a supply and shift rod fixedly connected to the inner wall of the cutting frame, and the supply and shift rod is slidably connected to the tool carrier, the top of the tool carrier is fixedly connected to a scissors frame, and the center of the scissors frame is fixedly connected to the cutting frame, and the outer surface of one of the tool carriers is fixedly connected to a supply and shift platform.

[0006] Preferably, the adjustable distance cutting mechanism also includes a threaded rod rotatably connected to the cutting frame, and the threaded rod is threadedly connected to the supply and transfer platform, a pointer is fixedly connected to the top of the supply and transfer platform, and scale lines are equidistantly arranged on the cutting frame, and the pointer is located below the scale lines.

[0007] Preferably, the adjustable pitch cutting mechanism also includes a reciprocating screw rotatably connected to the cutting frame, the top end of the reciprocating screw is fixedly connected to a secondary bevel gear, and the secondary bevel gear is meshed with the main bevel gear, the outer surface of the reciprocating screw is threadedly connected to a moving block, and the end of the moving block away from the reciprocating screw is fixedly connected to the main cutting knife.

[0008] Preferably, the adjustable cutting mechanism also includes a limit frame fixedly connected to the outer surface of the cutting frame, and the limit frame is slidably connected to the moving block, and a stripping groove is provided on the top surface of the loading plate, and the stripping groove is located below the main cutting knife.

[0009] Preferably, the adsorption component includes an air collecting box fixedly connected to the bottom end of the loading plate, the inner wall of the air collecting box is slidably connected to a chip drawer, an air collecting cylinder is connected and fixed to the air collecting box, a rotating shaft is rotatably connected to the center of the air collecting cylinder, a secondary turntable is fixedly connected to the middle section of the rotating shaft, and a fan blade is fixedly connected to the end of the rotating shaft away from the air collecting box.

[0010] Preferably, the adsorption assembly also includes a main turntable fixedly connected to the output end of the servo motor, a second belt is drivingly connected between the main turntable and the auxiliary turntable, a filter is detachably connected to one end of the air collecting cylinder close to the air collecting support box, ventilation holes are equidistantly provided on the loading plate, and the ventilation holes are communicated with the air collecting support box.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the coordinated use of the main bevel gear, the auxiliary bevel gear and the reciprocating screw rod and other structures, and can use the spline shaft to carry the continuous rotation of the main bevel gear, so that the spline shaft can follow the rotation through the bearing linkage spline sleeve, and the spline sleeve is linked to the corresponding cutting auxiliary knife to rotate, so as to cut the soft ceramic plate placed on the carrier plate into multiple groups of long strips longitudinally, and the rotation of the main bevel gear is linked to the rotation of the reciprocating screw rod through the auxiliary bevel gear, so that the cutting main knife moves up and down to cut off the multiple groups of long strips of soft ceramic plates at equal distances, so as to quickly cut the soft ceramic plates into rectangular soft ceramic tiles of the same size, which can ensure that the size of the soft ceramic tiles cut is consistent while improving the cutting efficiency; The present invention uses the scissor frame and the threaded rod and other structures in coordination, and can utilize the rotation of the threaded rod to make the supply and transfer platform carry the corresponding knife carrier to move horizontally, and through the linkage of the scissor frame, make a plurality of longitudinal cutting parts move at equal intervals, so as to synchronously adjust the required cutting thickness of soft tiles, and facilitate personnel to freely and synchronously adjust the longitudinal cutting distance according to the use requirements; The present invention uses the wind collecting tube, fan blades, ventilation holes and other structures in coordination, and can utilize the suction force generated by the rotation of the fan blades carried by the rotating shaft to adsorb the ventilation holes covered by the carrier plate, so that the carrier plate can be placed more stably during cutting and the carrier plate can be prevented from being offset by cutting force. The uncovered ventilation holes suck in the debris generated by the cutting, and the debris is collected in the chip carrier, which is beneficial to increase the stability of the carrier plate while collecting the debris generated by the cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the connection structure between the knife carrier and the cutting auxiliary knife shown in the present invention; Figure 3 It is a schematic diagram of the split structure of the tool carrier and the spline sleeve shown in the present invention; Figure 4 It is a longitudinal sectional schematic diagram of the overall structure shown in the present invention; Figure 5 The present invention shows Figure 4 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the connection structure between the main bevel gear and the auxiliary bevel gear shown in the present invention; Figure 7 It is a cross-sectional schematic diagram of the overall structure shown in the present invention; Figure 8 The present invention shows Figure 7 Schematic diagram of the enlarged structure at point B.

[0013] The numbers in the figure are: 1. Cutting frame; 2. Loading plate; 3. Adjustable cutting mechanism; 4. Adsorption component; 5. Scale line; 6. Pointer; 7. Stripping chute; 31. servo motor; 32. spline shaft; 33. supply and transfer rod; 34. tool carrier; 35. cutting auxiliary tool; 36. spline sleeve; 37. supply and transfer plate; 38. first belt; 39. main bevel gear; 310. auxiliary bevel gear; 311. reciprocating screw rod; 312. moving block; 313. limit frame; 314. cutting main tool; 315. threaded rod; 316. supply and transfer platform; 317. scissor frame; 41. Main turntable; 42. Second belt; 43. Auxiliary turntable; 44. Rotating shaft; 45. Wind collecting tube; 46. Fan blades; 47. Wind collecting tray; 48. Chip collecting drawer; 49. Ventilation hole. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Embodiments of the present invention Please refer to Figures 1 to 8 As shown, a soft porcelain production cutting device with an adjustment function includes a cutting frame 1, the inner wall of the cutting frame 1 is fixedly connected with a carrier plate 2, and the carrier plate 2 is used to place the soft porcelain plate. A soft porcelain production cutting device with an adjustment function includes: The adjustable cutting mechanism 3 is arranged above the carrier plate 2, and is used to cut the soft ceramic plate into multiple groups of strips at equal distances in the longitudinal direction, and to cut the multiple groups of strips at equal distances in the transverse direction; The adsorption component 4 is arranged below the carrier plate 2, and is used to adsorb the soft ceramic plate to the top surface of the carrier plate 2 and collect the debris generated by cutting the soft ceramic plate; The adjustable cutting mechanism 3 includes a servo motor 31 installed on the outer surface of the cutting frame 1, the output end of the servo motor 31 is fixedly connected to a spline shaft 32, the outer surface of the spline shaft 32 is equidistantly splined to a spline sleeve 36, the outer surface of any spline sleeve 36 is fixedly connected to a tool carrier 34 through a bearing, the inner wall of the tool carrier 34 is rotatably connected to a cutting auxiliary knife 35, the outer surface of the cutting auxiliary knife 35 is fixedly connected to a supply and transfer disk 37, a first belt 38 is transmission-connected between the supply and transfer disk 37 and the spline sleeve 36, and the end of the spline shaft 32 away from the servo motor 31 is fixedly connected to a main bevel gear 39; The adjustable cutting mechanism 3 also includes a supply and shift rod 33 fixedly connected to the inner wall of the cutting frame 1, and the supply and shift rod 33 is slidably connected to the knife carrier 34, the top of the knife carrier 34 is fixedly connected to a scissor frame 317, and the center of the scissor frame 317 is fixedly connected to the cutting frame 1, and the outer surface of the knife carrier 34 is fixedly connected to a supply and shift platform 316; The adjustable cutting mechanism 3 further includes a threaded rod 315 rotatably connected to the cutting frame 1, and the threaded rod 315 is threadedly connected to the supply and transfer platform 316, a pointer 6 is fixedly connected to the top of the supply and transfer platform 316, and scale lines 5 are equidistantly arranged on the cutting frame 1, and the pointer 6 is located below the scale lines 5; The adjustable cutting mechanism 3 also includes a reciprocating screw rod 311 rotatably connected to the cutting frame 1, the top of the reciprocating screw rod 311 is fixedly connected to a secondary bevel gear 310, and the secondary bevel gear 310 is meshed with the main bevel gear 39, and the outer surface of the reciprocating screw rod 311 is threadedly connected to a moving block 312, and the end of the moving block 312 away from the reciprocating screw rod 311 is fixedly connected to a cutting main knife 314; The adjustable cutting mechanism 3 also includes a limit frame 313 fixedly connected to the outer surface of the cutting frame 1, and the limit frame 313 is slidably connected to the moving block 312. The top surface of the material loading plate 2 is provided with a stripping groove 7, and the stripping groove 7 is located below the main cutting knife 314. Supplementary explanation: The output end of the servo motor 31 is fixedly connected with a rotation rod, which is rotatably connected to the cutting frame 1, and the rotation rod is fixedly connected with the main turntable 41, the spline shaft 32 and the main bevel gear 39 in sequence from left to right; A bearing ring is provided between the spline sleeve 36 and the tool carrier 34 , the outer ring of the bearing ring is fixedly connected to the tool carrier 34 , and the inner ring of the bearing ring is fixedly connected to the spline sleeve 36 ; The knife carrier 34, the spline sleeve 36, the cutting auxiliary knife 35, the first belt 38 and the supply and transfer plate 37 form a longitudinal cutting component, and an odd number of longitudinal cutting components are provided; The moving block 312 is L-shaped, and a limiting slide groove is provided on the limiting frame 313, and the L-shaped moving block 312 passes through the limiting slide groove and is fixedly connected to the main cutting knife 314; The above scheme is adopted: through the coordinated use of the main bevel gear 39, the auxiliary bevel gear 310 and the reciprocating screw 311 and other structures, the spline shaft 32 can be used to carry the continuous rotation of the main bevel gear 39, so that the spline shaft 32 can follow the rotation through the bearing linkage spline sleeve 36, and the spline sleeve 36 is linked to the corresponding cutting auxiliary knife 35 to rotate, so that the soft ceramic plate placed on the carrier plate 2 is longitudinally cut into multiple groups of long strips, and the rotation of the main bevel gear 39 is linked to the rotation of the reciprocating screw 311 through the auxiliary bevel gear 310, so that the cutting main knife 314 moves up and down to cut off the multiple groups of long strips of soft ceramic plates at equal distances, so as to quickly cut the soft ceramic plates into rectangular soft ceramic tiles of the same size, which can ensure that the size of the soft ceramic tiles cut is consistent while improving the cutting efficiency; In addition, by using the scissor frame 317 in conjunction with structures such as the threaded rod 315, the threaded rod 315 can be rotated to allow the transfer platform 316 to carry the corresponding tool carrier 34 and move horizontally, and by the linkage of the scissor frame 317, several longitudinal cutting components can be moved at equal intervals, thereby synchronously adjusting the required cutting thickness of soft tiles, making it convenient for personnel to freely and synchronously adjust the longitudinal cutting distance according to usage requirements.

[0016] Please refer to Figure 7 and Figure 8As shown, the adsorption assembly 4 includes a wind collecting support box 47 fixedly connected to the bottom end of the carrier plate 2, the inner wall of the wind collecting support box 47 is slidably connected to a crumb drawer 48, the wind collecting support box 47 is connected and fixed with a wind collecting cylinder 45, the center of the wind collecting cylinder 45 is rotatably connected with a rotating shaft 44, the middle section of the rotating shaft 44 is fixedly connected with a secondary turntable 43, and the end of the rotating shaft 44 away from the wind collecting support box 47 is fixedly connected with a fan blade 46; The adsorption assembly 4 further includes a main turntable 41 fixedly connected to the output end of the servo motor 31, a second belt 42 is drivingly connected between the main turntable 41 and the auxiliary turntable 43, a filter screen is detachably connected to one end of the air collecting cylinder 45 close to the air collecting support box 47, and ventilation holes 49 are equidistantly opened on the carrier plate 2, and the ventilation holes 49 are connected to the air collecting support box 47; Supplementary explanation: The ventilation holes 49 are equidistantly arranged on the carrier plate 2, and the combined length of the ventilation holes 49 is greater than the width of the soft ceramic plate; The fan blades 46 are fixed to the outer surface of the rotating shaft 44 at an angle and at equal distances, so that the fan blades 46 rotate to generate wind force which is drawn toward the wind collecting tube 45 by the wind collecting support box 47; The above scheme is adopted: through the coordinated use of the structures such as the wind collecting tube 45, the fan blades 46 and the ventilation holes 49, the suction force generated by the rotation of the rotating shaft 44 carrying the fan blades 46 can be utilized to make the ventilation holes 49 covered by the carrier plate 2 adsorb it, so that the carrier plate 2 can be placed more stably during cutting, and the carrier plate 2 can be prevented from being offset by the cutting force. The uncovered ventilation holes 49 suck in the debris generated by the cutting, and the debris is collected in the chip carrier 48, which is beneficial to increase the stability of the carrier plate 2 while collecting the debris generated by the cutting.

[0017] The working principle and use process of the present invention: First, the staff places the soft ceramic plate on the carrier plate 2 and moves it toward the cutting auxiliary knife 35, or installs a conveying device behind the cutting frame 1, and opens a vent on the conveyor belt in the conveying device, and then places the carrier plate 2 on the conveyor belt, and the conveyor belt transports the soft ceramic plate toward the cutting auxiliary knife 35; Subsequently, the staff drives the servo motor 31 to make the main turntable 41 and the spline shaft 32 rotate accordingly. Since the outer surface of the spline shaft 32 is equidistantly splined to the spline sleeve 36, the outer surface of any spline sleeve 36 is fixedly connected to the tool carrier 34 through a bearing. The inner wall of the tool carrier 34 is rotatably connected to the cutting auxiliary knife 35, and the outer surface of the cutting auxiliary knife 35 is fixedly connected to the supply and transfer plate 37. The supply and transfer plate 37 and the spline sleeve 36 are connected by a first belt 38, which drives the multiple cutting auxiliary knives 35 to rotate with the rotation of the spline shaft 32, so that the multiple cutting auxiliary knives 35 can longitudinally cut the soft porcelain plate placed on the carrier plate 2 into multiple groups of long strips; At the same time, the main bevel gear 39 rotates with the spline shaft 32, and the reciprocating screw rod 311 rotates through the secondary bevel gear 310, so that the main cutting knife 314 moves up and down to cut off multiple groups of long soft ceramic plates at equal distances, so as to quickly cut the soft ceramic plates into rectangular soft ceramic tiles of the same size; As the main turntable 41 rotates, the main turntable 41 is linked to the auxiliary turntable 43 through the second belt 42 to rotate. Since the wind collecting box 47 is connected to the fixed wind collecting cylinder 45, the center of the wind collecting cylinder 45 is rotatably connected to the rotating shaft 44, and the middle section of the rotating shaft 44 is fixedly connected to the auxiliary turntable 43. The rotating shaft 44 is fixedly connected to the fan blade 46 at one end away from the wind collecting box 47, and the fan blade 46 is tilted and equidistantly fixed on the outer surface of the rotating shaft 44, so that the fan blade 46 rotates to generate wind force, which is drawn toward the wind collecting cylinder 45 by the wind collecting box 47, so that the fan blade 46 continues to rotate to continuously draw the air in the wind collecting box 47 to the outside of the device, so that the ventilation holes 49 covered by the carrier plate 2 adsorb it, so that the carrier plate 2 can be placed more stably during cutting to prevent the carrier plate 2 from being offset by cutting force, while the uncovered ventilation holes 49 suck in the debris generated by the cutting, so that the debris is collected in the chip carrier 48.

[0018] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft porcelain production cutting device with an adjustment function, comprising a cutting frame (1), the inner wall of the cutting frame (1) being fixedly connected with a material carrier plate (2), and the material carrier plate (2) being used for placing soft porcelain plates, characterized in that: The soft porcelain production cutting device with adjustment function comprises: A distance-adjustable cutting mechanism (3), the distance-adjustable cutting mechanism (3) being arranged above the carrier plate (2), and being used for cutting the soft ceramic plate into a plurality of groups of long strips at equal distances in the longitudinal direction, and for cutting the plurality of groups of long strips at equal distances in the transverse direction; An adsorption component (4) is arranged below the carrier plate (2), and is used to adsorb the soft ceramic plate to the top surface of the carrier plate (2) and collect debris generated by cutting the soft ceramic plate.

2. The soft porcelain production cutting device with adjustment function according to claim 1 is characterized in that: The adjustable cutting mechanism (3) comprises a servo motor (31) mounted on the outer surface of the cutting frame (1); the output end of the servo motor (31) is fixedly connected to a spline shaft (32); the outer surface of the spline shaft (32) is equidistantly splined to a spline sleeve (36); the outer surface of any of the spline sleeves (36) is fixedly connected to a tool carrier (34) via a bearing; the inner wall of the tool carrier (34) is rotatably connected to a cutting auxiliary knife (35); the outer surface of the cutting auxiliary knife (35) is fixedly connected to a supply and transfer disk (37); a first belt (38) is transmission-connected between the supply and transfer disk (37) and the spline sleeve (36); and the end of the spline shaft (32) away from the servo motor (31) is fixedly connected to a main bevel gear (39).

3. The soft porcelain production cutting device with adjustment function according to claim 2 is characterized in that: The adjustable cutting mechanism (3) further comprises a supply and shift rod (33) fixedly connected to the inner wall of the cutting frame (1), and the supply and shift rod (33) is slidably connected to a knife carrier (34), a scissors frame (317) is fixedly connected to the top of the knife carrier (34), and the center of the scissors frame (317) is fixedly connected to the cutting frame (1), and a supply and shift platform (316) is fixedly connected to the outer surface of the knife carrier (34).

4. The soft porcelain production cutting device with adjustment function according to claim 3 is characterized in that: The adjustable cutting mechanism (3) further comprises a threaded rod (315) rotatably connected to the cutting frame (1), and the threaded rod (315) is threadedly connected to a supply and transfer platform (316), a pointer (6) is fixedly connected to the top of the supply and transfer platform (316), and scale lines (5) are equidistantly arranged on the cutting frame (1), and the pointer (6) is located below the scale lines (5).

5. The soft porcelain production cutting device with adjustment function according to claim 2 is characterized in that: The adjustable cutting mechanism (3) further comprises a reciprocating screw (311) rotatably connected to the cutting frame (1); a secondary bevel gear (310) is fixedly connected to the top end of the reciprocating screw (311), and the secondary bevel gear (310) is meshed with a main bevel gear (39); a moving block (312) is threadedly connected to the outer surface of the reciprocating screw (311); and a main cutting knife (314) is fixedly connected to one end of the moving block (312) away from the reciprocating screw (311).

6. The soft porcelain production cutting device with adjustment function according to claim 5 is characterized in that: The adjustable cutting mechanism (3) further comprises a limiting frame (313) fixedly connected to the outer surface of the cutting frame (1), and the limiting frame (313) is slidably connected to the moving block (312), and a material stripping groove (7) is provided on the top surface of the material loading plate (2), and the material stripping groove (7) is located below the main cutting knife (314).

7. The soft porcelain production cutting device with adjustment function according to claim 1 is characterized in that: The adsorption assembly (4) comprises an air collecting support box (47) fixedly connected to the bottom end of the material carrier plate (2); the inner wall of the air collecting support box (47) is slidably connected to a crumb drawer (48); an air collecting cylinder (45) is connected and fixed to the air collecting support box (47); a rotating shaft (44) is rotatably connected to the center of the air collecting cylinder (45); a secondary turntable (43) is fixedly connected to the middle section of the rotating shaft (44); and a fan blade (46) is fixedly connected to one end of the rotating shaft (44) away from the air collecting support box (47).

8. The soft porcelain production cutting device with adjustment function according to claim 7 is characterized in that: The adsorption assembly (4) further comprises a main turntable (41) fixedly connected to the output end of the servo motor (31); a second belt (42) is drivingly connected between the main turntable (41) and the auxiliary turntable (43); a filter screen is detachably connected to one end of the air collecting cylinder (45) close to the air collecting support box (47); ventilation holes (49) are equidistantly provided on the material loading plate (2), and the ventilation holes (49) are in communication with the air collecting support box (47).

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