A drying device for preparing prepreg

Abstract

The invention discloses a drying device for preparing prepreg, and relates to a reciprocating lifting frame in the field of prepreg shaping technology. A nozzle facing the prepreg is installed on the side wall of the hot air cylinder, a horizontal sliding assembly is connected to the servo motor I, an extension frame is installed on the horizontal sliding assembly, a scraper relative to the prepreg is fixed on the rotating shaft, a steering assembly for driving the rotating shaft to rotate is installed on the extension frame, an opening and closing assembly is installed on the rotating tube, and a switching assembly for driving the rotating tube to turn is installed on the horizontal sliding assembly. The present invention uses the linear reciprocating motion of the threaded sleeve block to make the scraper scrape the surface slurry of the prepreg, and the scraper can automatically reset and separate from the prepreg, and under the action of the switching assembly, the rotating tube drives the hot air cylinder to rotate, so that the nozzle faces the prepreg, and the alternation of slurry scraping and drying operations on the prepreg is realized, which greatly improves the drying and shaping operation efficiency of the prepreg.

Description

Technical Field

[0001] The invention relates to the technical field of prepreg shaping, in particular to a drying device for preparing prepreg. Background Art

[0002] Polyurethane fiber prepreg is a material made by pre-impregnating polyurethane fiber with matrix resin. This prepreg has good flexibility, excellent wear resistance and good chemical corrosion resistance. In the field of protective equipment, such as protective gloves and protective clothing, polyurethane fiber prepreg can provide good protection and comfort. In the manufacture of industrial conveyor belts, its wear resistance and chemical corrosion resistance can extend the service life of the conveyor belts. In terms of sporting goods, such as some special sports shoes, its flexibility and wear resistance can provide athletes with a better sports experience.

[0003] In the production process of polyurethane fiber prepreg, it is necessary to use a drying device to dry its surface to promote the rapid shaping of the slurry on the prepreg. However, since the excess slurry on the surface of the prepreg after slurry impregnation is easily accumulated or dripped during the transportation process, the prepreg is unevenly dried during the drying operation, which is not conducive to ensuring the shaping quality of the prepreg. Therefore, a drying device for preparing prepreg is provided to solve the above problem. Summary of the invention

[0004] The object of the present invention is to provide a drying device for preparing prepreg to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A drying device for preparing prepreg comprises a reciprocating lifting frame, wherein the prepreg passes vertically through the reciprocating lifting frame, the reciprocating lifting frame reciprocates vertically relative to the prepreg, hot air cylinders are installed on both sides of the prepreg, and nozzles facing the prepreg are installed on the side walls of the hot air cylinders, a servo motor 1 is installed on the reciprocating lifting frame, a horizontal sliding component is driven and connected to the servo motor 1, an extension frame is installed on the horizontal sliding component, an elastic connection component is installed on the extension frame, a sliding frame is installed on the elastic connection component, a rotating shaft is rotatably installed on the sliding frame, a scraper opposite to the prepreg is fixed on the rotating shaft, The sliding frame is fixed with two side baffles respectively located on both sides of the scraper, the extension frame is equipped with a steering assembly for driving the rotating shaft to rotate, the sliding frame is equipped with a collecting trough, and the collecting trough is arranged opposite to the scraper through an aggregate channel, the sliding frame is equipped with a servo motor II, and the servo motor II is driven and connected to a material diverting assembly for cleaning the scraper, a rotating tube connected thereto is coaxially fixed to the end of the hot air cylinder, an opening and closing assembly is installed on the rotating tube, an air intake pipe is installed on the opening and closing assembly, and a switching assembly for driving the rotating tube to turn is installed on the horizontal sliding assembly.

[0007] As an improved solution of the present invention: the horizontal sliding assembly includes two coaxially fixed threaded rods with opposite thread rotation directions, each of the threaded rods is threadedly sleeved with a threaded sleeve block located on both sides of the prepreg, the threaded sleeve block is slidably connected to the reciprocating lifting frame, and the threaded sleeve block is fixed to the extension frame.

[0008] As an improved solution of the present invention: the elastic connection assembly includes a fixed block fixed on the sliding frame, a guide rod is fixed on the fixed block, the extension frame is slidably sleeved on the guide rod, and a connecting spring is fixed between the extension frame and the fixed block.

[0009] As an improved solution of the present invention: the steering assembly includes a gear I fixed coaxially with the rotating shaft, a gear II meshing with the gear I is rotatably mounted on the sliding frame, a transmission rack meshing with the gear II is fixed on the extension frame, and a stop plate corresponding to the sliding frame is fixed on the reciprocating lifting frame.

[0010] As an improved solution of the present invention: the steering assembly also includes a positioning plate fixedly sleeved on the rotating shaft, a limiting sleeve plate is fixed on the sliding frame, a guide rod is slidably installed on the limiting sleeve plate, a trapezoidal plug block is fixed on the end of the guide rod, a thrust spring is installed between the trapezoidal plug block and the limiting sleeve plate, and two V-shaped grooves are provided on the positioning plate to be plugged in and adapted to the trapezoidal plug block.

[0011] As an improved solution of the present invention: the material removing assembly includes two coaxially fixed threaded columns with opposite thread rotation directions which are driven to rotate by a servo motor II, each of the threaded columns is threadedly sleeved with a translation frame which is slidably connected to the sliding frame, and a material removing plate which abuts against the scraper is installed on the translation frame through a torsion connection assembly.

[0012] As an improved solution of the present invention: the torsion connection assembly includes a mounting frame fixed on the material stripping plate, the mounting frame is fixed with a rotating column rotatably mounted on the translation frame, the rotating column is sleeved with a torsion spring, the two ends of the torsion spring are respectively fixed to the translation frame and the mounting frame, and the sliding frame is fixed with a push rod arranged opposite to the material stripping plate.

[0013] As an improved solution of the present invention: the switching assembly includes a U-shaped switching frame fixed to the outer side wall of the rotating tube, a pin is slidably mounted on the U-shaped switching frame, and the pin is fixed on the threaded sleeve block.

[0014] As an improved solution of the present invention: the opening and closing assembly includes a connecting frame fixed on the reciprocating lifting frame, a sleeve is fixed on the connecting frame, the rotating tube is rotatably installed on the sleeve, the sleeve and the interior of the rotating tube are connected, and the sleeve is sealed and slidably installed with a sealing plug.

[0015] As an improved solution of the present invention: the opening and closing assembly also includes a fixed plate fixed to the end of the sealing plug column, an extension plate is fixed on the fixed plate, a driven bevel gear is rotatably installed on the reciprocating lifting frame, the driven bevel gear is meshedly connected with an active bevel gear fixedly sleeved on the rotating tube, a rotating wheel is coaxially fixed on the driven bevel gear, a connecting rod is eccentrically hinged on the rotating wheel, and the end of the connecting rod away from the rotating wheel is hinged on the extension plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes drying and shaping of the prepreg by conveying airflow through the nozzle on the hot air cylinder. Before the prepreg is shaped, the scraper can be rotated to abut against the prepreg under the drive of the steering component. Under the sliding action of the reciprocating lifting frame, the scraper can scrape off the excess slurry on the prepreg, thereby ensuring that the slurry on the prepreg is evenly distributed before shaping, thereby greatly improving the drying and shaping quality of the prepreg.

[0018] The present invention uses the linear reciprocating motion of the threaded sleeve block to enable the scraper to automatically reset and separate from the prepreg after scraping the surface slurry on the prepreg. Under the action of the switching component, the rotating tube drives the hot air cylinder to rotate so that the nozzle is directed toward the prepreg, thereby realizing the alternating operation of scraping the slurry on the prepreg and drying the prepreg, thereby greatly improving the efficiency of the drying and shaping operation of the prepreg. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of the middle A part;

[0022] Figure 4 For the present invention Figure 2 A schematic diagram of the structure at a certain viewing angle;

[0023] Figure 5 It is a schematic diagram of the connection between the rotating pipe, the air inlet pipe and the opening and closing assembly in the present invention;

[0024] Figure 6 For the present invention Figure 5 Exploded view of local structure;

[0025] Figure 7 It is a schematic diagram of the connection of the sliding frame, the extension frame, the threaded sleeve block and the elastic connection assembly in the present invention;

[0026] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at a certain viewing angle;

[0027] Fig. 9 For the present invention Figure 8 The enlarged schematic diagram of the middle part B;

[0028] Fig.10 It is a schematic diagram of the connection of the scraper, the rotating shaft and the material shifting assembly in the present invention;

[0029] Fig.11 The figure is a schematic diagram of the connection of the rotating shaft, the positioning plate, the trapezoidal plug block and the guide rod in the present invention.

[0030] In the figure: 1-prepreg, 2-reciprocating lifting frame, 3-hot air cylinder, 4-nozzle, 5-scraper, 6-servo motor I, 7-threaded rod, 8-threaded sleeve, 9-rotating tube, 10-sleeve, 11-intake pipe, 12-extension frame, 13-sliding frame, 14-rotating wheel, 15-connecting rod, 16-extension plate, 17-fixed plate, 18-V-shaped slot, 19-side baffle, 20-U-shaped switching frame, 21-pin, 22-driven bevel gear, 23-active bevel gear, 24-collecting tank, 2 5-connecting frame, 26-sealing plug, 27-fixing block, 28-connecting spring, 29-gear I, 30-feeding plate, 31-gear II, 32-transmission rack, 33-translation frame, 34-rotating column, 35-torsion spring, 36-push rod, 37-collecting channel, 38-threaded column, 39-mounting frame, 40-rotating shaft, 41-positioning plate, 42-limiting sleeve, 43-push spring, 44-trapezoidal plug, 45-guide rod, 46-stop plate, 47-servo motor II. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments: Example

[0032] Please see attached Figure 1 -Attached Fig.11 A drying device for preparing prepreg comprises a reciprocating lifting frame 2, a prepreg 1 vertically passes through the reciprocating lifting frame 2, the reciprocating lifting frame 2 reciprocates vertically relative to the prepreg 1, hot air cylinders 3 are installed on both sides of the prepreg 1, a nozzle 4 facing the prepreg 1 is installed on the side wall of the hot air cylinder 3, a servo motor 16 is installed on the reciprocating lifting frame 2, a horizontal sliding component is driven and connected to the servo motor 16, an extension frame 12 is installed on the horizontal sliding component, an elastic connection component is installed on the extension frame 12, a sliding frame 13 is installed on the elastic connection component, a rotating shaft 40 is rotatably installed on the sliding frame 13, and a scraper opposite to the prepreg 1 is fixed on the rotating shaft 40 5. Two side baffles 19 are fixed on the sliding frame 13, which are respectively located on both sides of the scraper 5. A steering assembly for driving the rotating shaft 40 to rotate is installed on the extension frame 12. A collecting trough 24 is installed on the sliding frame 13. The collecting trough 24 is arranged opposite to the scraper 5 through the collecting channel 37. A servo motor II47 is installed on the sliding frame 13. The servo motor II47 is driven and connected to a material-discharging assembly for cleaning the scraper 5. A rotating tube 9 connected to the end of the hot air cylinder 3 is coaxially fixed, and an opening and closing assembly is installed on the rotating tube 9. The opening and closing assembly is installed on the air inlet pipe 11. A switching assembly for driving the rotating tube 9 to turn is installed on the horizontal sliding assembly.

[0033] The prepreg 1 is conveyed step by step by an external conveying mechanism, and the reciprocating lifting frame 2 reciprocates relative to the prepreg 1. The surface of the prepreg 1 is scraped by the scraper 5 to remove excess slurry on the surface of the prepreg 1 and promote the uniform distribution of the slurry on the prepreg 1. Then the scraper 5 is separated from the prepreg 1, and the nozzle 4 blows hot air toward the prepreg 1 to achieve drying and shaping of the prepreg 1.

[0034] The horizontal sliding assembly of the device includes two coaxially fixed threaded rods 7 with opposite threaded directions, each threaded rod 7 is threadedly sleeved with a threaded sleeve block 8 located on both sides of the prepreg 1, the threaded sleeve block 8 is slidably connected to the reciprocating lifting frame 2, and the threaded sleeve block 8 is fixed to the extension frame 12. The elastic connection assembly includes a fixed block 27 fixed to the sliding frame 13, a guide rod 45 is fixed to the fixed block 27, the extension frame 12 is slidably sleeved on the guide rod 45, and a connecting spring 28 is fixed between the extension frame 12 and the fixed block 27.

[0035] Through the above arrangement, the servo motor I6 drives the threaded rod 7 to rotate alternately clockwise and counterclockwise, and the threaded rod 7 can drive the threaded sleeve block 8 to move relative to the reciprocating lifting frame 2. At this time, the threaded sleeve block 8 drives the extension frame 12 to move, and the extension frame 12 drives the sliding frame 13 and the scraper 5 thereon to move toward the prepreg 1 through the elastic connection component.

[0036] The steering assembly includes a gear I29 coaxially fixed with the rotating shaft 40, a gear II31 meshing with the gear I29 is rotatably mounted on the sliding frame 13, a transmission rack 32 meshing with the gear II31 is fixed on the extension frame 12, and a stop plate 46 corresponding to the sliding frame 13 is fixed on the reciprocating lifting frame 2. The steering assembly also includes a positioning plate 41 fixedly sleeved on the rotating shaft 40, a limiting sleeve 42 is fixed on the sliding frame 13, a guide rod 45 is slidably mounted on the limiting sleeve 42, a trapezoidal plug 44 is fixed at the end of the guide rod 45, a push spring 43 is installed between the trapezoidal plug 44 and the limiting sleeve 42, and two V-shaped slots 18 are provided on the positioning plate 41 to be plugged and adapted to the trapezoidal plug 44.

[0037] The sliding frame 13 moves toward the prepreg 1 until the sliding frame 13 abuts against the stop plate 46. Thereafter, the extension frame 12 slides relative to the guide rod 45. The transmission rack 32 at the bottom of the extension frame 12 drives the gear II31 to rotate, the gear II31 drives the gear I29 to rotate, and the gear I29 drives the rotating shaft 40 to rotate. At this time, the rotating shaft 40 drives the scraper 5 to rotate toward the prepreg 1, so that the scraper 5 abuts against the prepreg 1. During the linear sliding process of the reciprocating lifting frame 2 relative to the prepreg 1, the scraper 5 can scrape off the excess slurry on the surface of the prepreg 1, which greatly improves the subsequent drying and shaping quality of the prepreg 1. After the above-mentioned rotation and adjustment of the scraper 5, the trapezoidal plug block 44 is plugged into the V-shaped groove 18 to realize the position limitation of the scraper 5, which effectively ensures the position stability of the scraper 5 in the process of scraping the slurry on the surface of the prepreg 1.

[0038] In addition, the material-discharging assembly of the device includes two threaded columns 38 that are coaxially fixed and have opposite threaded directions and are driven to rotate by a servo motor II47. A translation frame 33 that is slidably connected to the sliding frame 13 is threadedly sleeved on each threaded column 38, and a material-discharging plate 30 that abuts against the scraper 5 is installed on the translation frame 33 through a torsion connection assembly. The torsion connection assembly includes a mounting frame 39 fixed on the material-discharging plate 30, a rotating column 34 that is rotatably mounted on the translation frame 33 is fixed on the mounting frame 39, a torsion spring 35 is sleeved on the rotating column 34, and the two ends of the torsion spring 35 are respectively fixed to the translation frame 33 and the mounting frame 39, and a push rod 36 that is arranged opposite to the material-discharging plate 30 is fixed on the sliding frame 13.

[0039] After the scraper 5 is reset, the scraper 5 abuts against the material stripping plate 30, and the servo motor II47 can drive the threaded column 38 to rotate alternately clockwise and counterclockwise, and the threaded column 38 drives the translation frame 33 to move linearly back and forth. At this time, the material stripping plate 30 can scrape and clean the slurry on the scraper 5 to ensure that when the scraper 5 scrapes the surface of the prepreg 1, there will not be a lot of slurry residue on the scraper 5 and drip onto the prepreg 1, thereby improving the scraping effect on the prepreg 1 and further improving the shaping quality of the prepreg 1.

[0040] After the material stripping plate 30 moves to abut against the push rod 36, the material stripping plate 30 can rotate around the rotating column 34. At this time, the slurry accumulated by the material stripping plate 30 can be moved to the inside of the collecting tank 24 for collection, which effectively improves the cleaning effect on the surface of the scraper 5. Example

[0041] Please refer to the attached Figure 1 -Attached Fig.11 On the basis of Example 1, in addition, the switching component of the device includes a U-shaped switching frame 20 fixed to the outer wall of the rotating tube 9, and a pin 21 is slidably installed on the U-shaped switching frame 20, and the pin 21 is fixed on the threaded sleeve block 8.

[0042] When the threaded sleeve 8 slides toward the prepreg 1, the scraper 5 rotates to contact the surface of the prepreg 1, and at this time, the pin 21 moves with the threaded sleeve 8 and drives the U-shaped switching frame 20 to rotate. At this time, the U-shaped switching frame 20 drives the rotating tube 9 to rotate, so that the hot air cylinder 3 and the nozzle 4 rotate to not be opposite to the prepreg 1; when the threaded sleeve 8 slides away from the prepreg 1, the scraper 5 is reset and does not contact the prepreg 1. At this time, the U-shaped switching frame 20 rotates and resets, and the hot air cylinder 3 and the nozzle 4 rotate to be opposite to the prepreg 1. The hot air sprayed from the nozzle 4 is used to dry and shape the prepreg 1. Through the automatic switching operation of the scraper 5 and the nozzle 4 positions, the alternation of scraping off the slurry on the surface of the prepreg 1 and drying and shaping is realized, which greatly improves the drying and shaping quality and automation of the prepreg 1.

[0043] In addition, the opening and closing assembly of the device includes a connecting frame 25 fixed on the reciprocating lifting frame 2, a sleeve 10 is fixed on the connecting frame 25, a rotating tube 9 is rotatably mounted on the sleeve 10, the sleeve 10 is connected to the inside of the rotating tube 9, and a sealing plug 26 is slidably mounted in the sleeve 10. The opening and closing assembly also includes a fixed disk 17 fixed to the end of the sealing plug 26, an extension plate 16 is fixed on the fixed disk 17, a driven bevel gear 22 is rotatably mounted on the reciprocating lifting frame 2, a driving bevel gear 23 fixedly sleeved on the rotating tube 9 is meshed and connected to the driven bevel gear 22, a rotating wheel 14 is coaxially fixed to the driven bevel gear 22, a connecting rod 15 is eccentrically hinged on the rotating wheel 14, and an end of the connecting rod 15 away from the rotating wheel 14 is hinged on the extension plate 16.

[0044] Through the above arrangement, in the process that the hot air cylinder 3 drives the nozzle 4 to rotate to not be opposite to the prepreg 1, the rotating tube 9 drives the active bevel gear 23 to rotate, and the active bevel gear 23 drives the driven bevel gear 22 to rotate. At this time, the rotating wheel 14 rotates, and the rotating wheel 14 drives the extension plate 16 and the fixed plate 17 to move toward the sleeve 10 through the connecting rod 15. At this time, the sealing plug 26 moves along the sleeve 10 toward the rotating tube 9, and the sealing plug 26 seals the connection between the air inlet pipe 11 and the sleeve 10. At this time, no hot air enters the hot air cylinder 3 from the air inlet pipe 11, which effectively ensures that when the scraper 5 scrapes the prepreg 1, no hot air will be ejected from the nozzle 4, effectively avoiding the prepreg 1 from drying and shaping in advance.

[0045] In summary, the present invention realizes drying and shaping of the prepreg 1 by airflow conveying through the nozzle 4 on the hot air cylinder 3, and before the prepreg 1 is shaped, the scraper 5 can be rotated to abut against the prepreg 1 under the drive of the steering assembly, and the scraper 5 can scrape off the excess slurry on the prepreg 1 under the sliding action of the reciprocating lifting frame 2, so as to ensure that the slurry on the prepreg 1 is evenly distributed before shaping, which greatly improves the drying and shaping quality of the prepreg 1. The present invention uses the linear reciprocating motion of the threaded sleeve 8 to make the scraper 5 automatically reset and separate from the prepreg 1 after scraping the surface slurry of the prepreg 1, and under the action of the switching assembly, the rotating tube 9 drives the hot air cylinder 3 to rotate, so that the nozzle 4 faces the prepreg 1, realizing the alternation of scraping the slurry on the prepreg 1 and drying operations, which greatly improves the drying and shaping operation efficiency of the prepreg 1.

[0046] It should be noted that although this specification is described according to the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above embodiments only express the preferred implementation methods of the technical solution, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention of the technical solution. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations, improvements and substitutions can be made, which all belong to the protection scope of the present technical solution. The protection scope of the invention of the present technical solution shall be based on the attached claims.

Claims

1. A drying device for preparing prepreg, comprising a reciprocating lifting frame (2), wherein the prepreg (1) vertically passes through the reciprocating lifting frame (2), wherein the reciprocating lifting frame (2) vertically reciprocates relative to the prepreg (1), hot air cylinders (3) are installed on both sides of the prepreg (1), and a nozzle (4) facing the prepreg (1) is installed on the side wall of the hot air cylinder (3), wherein the hot air cylinder (3) is characterized in that: The reciprocating lifting frame (2) is equipped with a servo motor 1 (6), and the servo motor 1 (6) is connected to a horizontal sliding assembly, and an extension frame (12) is equipped with an elastic connection assembly, and a sliding frame (13) is equipped with the elastic connection assembly. The sliding frame (13) is rotatably equipped with a rotating shaft (40), and a scraper (5) opposite to the prepreg (1) is fixed on the rotating shaft (40). Two side baffles (19) respectively located on both sides of the scraper (5) are fixed on the sliding frame (13), and a steering assembly for driving the rotating shaft (40) to rotate is installed on the extension frame (12). A collecting trough (24) is installed on the sliding frame (13). The collecting trough (24) is arranged opposite to the scraper (5) through the collecting channel (37); a servo motor II (47) is installed on the sliding frame (13); a material-discharging assembly for cleaning the scraper (5) is driven and connected to the servo motor II (47); a rotating tube (9) connected thereto is coaxially fixed to the end of the hot air cylinder (3); an opening and closing assembly is installed on the rotating tube (9); an air intake pipe (11) is installed on the opening and closing assembly; a switching assembly for driving the rotating tube (9) to turn is installed on the horizontal sliding assembly; the horizontal sliding assembly comprises two coaxially fixed threaded rods (7) with opposite thread rotation directions; each of the threaded rods (7) is threadedly sleeved with threaded rods located on both sides of the prepreg (1) The sleeve block (8) is slidably connected to the reciprocating lifting frame (2), the threaded sleeve block (8) is fixed to the extension frame (12), the elastic connection component includes a fixed block (27) fixed to the sliding frame (13), a guide rod (45) is fixed to the fixed block (27), the extension frame (12) is slidably sleeved on the guide rod (45), a connecting spring (28) is fixed between the extension frame (12) and the fixed block (27), the steering component includes a gear I (29) coaxially fixed to the rotating shaft (40), a gear II (31) meshing with the gear I (29) is rotatably mounted on the sliding frame (13), and a gear II (31) meshing with the gear II (31) is fixed to the extension frame (12). A transmission rack (32), a stop plate (46) corresponding to the sliding frame (13) is fixed on the reciprocating lifting frame (2), the material shifting assembly comprises two threaded columns (38) which are coaxially fixed and have opposite thread rotation directions and are driven to rotate by a servo motor II (47), each of the threaded columns (38) is threadedly sleeved with a translation frame (33) which is slidably connected to the sliding frame (13), the translation frame (33) is mounted with a material shifting plate (30) which abuts against the scraper (5) through a torsion connection assembly, the switching assembly comprises a U-shaped switching frame (20) fixed to the outer wall of the rotating tube (9), a pin column (21) is slidably mounted on the U-shaped switching frame (20), and the pin column (21) is fixed on the threaded sleeve block (8),The opening and closing assembly comprises a connecting frame (25) fixed on the reciprocating lifting frame (2), a sleeve (10) is fixed on the connecting frame (25), the rotating tube (9) is rotatably mounted on the sleeve (10), the sleeve (10) and the rotating tube (9) are internally connected, and a sealing plug (26) is slidably mounted in the sleeve (10).

2. A drying device for preparing prepreg according to claim 1, characterized in that: The steering assembly also includes a positioning plate (41) fixedly sleeved on the rotating shaft (40), a limiting sleeve (42) fixed on the sliding frame (13), a guide rod (45) slidably mounted on the limiting sleeve (42), a trapezoidal plug-in block (44) fixed at the end of the guide rod (45), a push spring (43) installed between the trapezoidal plug-in block (44) and the limiting sleeve (42), and two V-shaped slots (18) adapted to be plugged into the trapezoidal plug-in block (44) are provided on the positioning plate (41).

3. A drying device for preparing prepreg according to claim 2, characterized in that: The torsion connection assembly comprises a mounting frame (39) fixed on the material-shifting plate (30), a rotating column (34) rotatably mounted on the translation frame (33) being fixed on the mounting frame (39), a torsion spring (35) being sleeved on the rotating column (34), two ends of the torsion spring (35) being respectively fixed to the translation frame (33) and the mounting frame (39), and a push rod (36) arranged opposite to the material-shifting plate (30) being fixed on the sliding frame (13).

4. A drying device for preparing prepreg according to claim 1, characterized in that: The opening and closing assembly also includes a fixed plate (17) fixed to the end of the sealing plug (26), an extension plate (16) being fixed on the fixed plate (17), a driven bevel gear (22) being rotatably mounted on the reciprocating lifting frame (2), a driving bevel gear (23) being meshedly connected to the driven bevel gear (22) and fixedly sleeved on the rotating tube (9), a rotating wheel (14) being coaxially fixed to the driven bevel gear (22), a connecting rod (15) being eccentrically hinged to the rotating wheel (14), and an end of the connecting rod (15) away from the rotating wheel (14) being hinged to the extension plate (16).

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