A film blowing machine for processing medicinal plastic packaging bags

Abstract

The present invention discloses a film blowing machine for processing medicinal plastic packaging bags, which belongs to the technical field of film blowing machines. The bottom of the melting barrel is connected to multiple groups of feeding pipes, and the end of the feeding pipe is connected to one side of the conveying pipe; fan blades are installed at both ends of the rotating shaft, and symmetrical bearings are rotatably arranged on the inner wall of the conveying pipe, and ratchets are arranged on the inner wall of the bearings, and scraping arms for cleaning the inner wall of the conveying pipe are fixedly arranged on the side of the ratchets; the annular tube is connected to the other side of the conveying pipe through a baffle; an annular film blowing port is arranged on the top of the annular tube, and an outgoing air slot located outside the annular tube is also opened inside the base, and the outgoing air slot is connected to the inner air outlet cavity. The present invention can process multiple groups of equipment synchronously. When the rotating shaft drives the eccentric block to rotate, the ratchets are intermittently driven by the meshing part, so that the scraping arm scrapes the inner wall of the conveying pipe back and forth. The air outlet of the inner air outlet cavity can be adjusted by adjusting the structure, thereby adjusting the thickness of the film. This design improves the degree of freedom and usage scenarios.

Description

Technical Field

[0001] The invention relates to the technical field of film blowing machines, in particular to a film blowing machine used for processing medicinal plastic packaging bags. Background Art

[0002] The plastic bag film blowing machine is a device that heats and melts plastic particles, extrude them, and then blows them into film. It is mainly composed of an extruder, a die, a cooling device, a traction device, a winding device, etc. The plastic particles are added to the extruder barrel, heated and screw extruded to form a molten state, and then extruded from the die to form a tube billet, and air is blown into the tube billet to expand it and cool it to shape, and then it is pulled and wound to finally obtain a continuous plastic film. It is widely used in the plastic packaging industry and can be used to produce plastic bags, cling film and other film products of various specifications and uses.

[0003] The patent application with the publication number CN117885331A discloses a film blowing machine, which belongs to the technical field of plastic film production. The film blowing machine drives the support shaft to rotate through a motor, and under the transmission of two first gears, two crushing rollers are rotated to crush the falling materials, which is convenient for the subsequent heating of the materials, and the rotation of the support shaft can drive the cam to rotate, and the cam can move upward through the pulley extrusion fixing frame, so that the filter screen swings around the rotating rod, and the cam cooperates with the torsion spring to keep the filter screen reciprocatingly swinging, so that the crushed materials can be screened through the filter screen, and the larger materials are intercepted on the filter screen, and the filter screen swings to use the principle of winnowing crops to lift the materials upward, so that the large materials are thrown upward again to the top of the crushing rollers, so that the larger materials can be crushed again until the screening requirements of the filter screen are met, thereby maintaining the thoroughness of material crushing, reducing the problem of slow melting speed of large materials, thereby achieving efficient processing, and preventing accumulation and blockage.

[0004] However, the processing efficiency of the above-disclosed film blowing machine is average, and it cannot process multiple sets of equipment simultaneously. Moreover, after long-term use, the inner wall of the feeding component will be adhered to the melted material, thereby affecting the subsequent conveying operation. Moreover, the function is single, and the thickness of the film blowing cannot be adaptively adjusted according to actual needs, and there is a lack of an air volume adjustment structure. Summary of the invention

[0005] The purpose of the present invention is to solve the problems that the existing film blowing machine has average processing efficiency, cannot process multiple sets of equipment synchronously, and the inner wall of the feeding component will adhere to the molten material after long-term use, thereby affecting the subsequent conveying operation. In addition, the function is single, the thickness of the film cannot be adaptively adjusted according to actual needs, and there is a lack of an air volume adjustment structure. A film blowing machine for processing medicinal plastic packaging bags is provided.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a film blowing machine for processing medicinal plastic packaging bags, comprising a feeding mechanism, a conveying mechanism and a film blowing mechanism, the feeding mechanism comprising a melting barrel, the bottom of the melting barrel is connected to a plurality of feeding pipes, the conveying mechanism comprises a horizontal conveying pipe, the end of the feeding pipe is connected to one side of the conveying pipe; symmetrical support plates are arranged on the inner walls of both sides of the conveying pipe, a rotating shaft is rotatably installed between the support plates, fan blades are installed at both ends of the rotating shaft, and the inner wall of the conveying pipe is provided with a plurality of feeding pipes, and the feeding ... A symmetrical bearing is rotatably arranged on the upper part, a ratchet is arranged on the inner wall of the bearing, and a scraping arm for cleaning the inner wall of the conveying pipe is fixedly arranged on the side of the ratchet; the film blowing mechanism includes a base and a protective cover, an inner air outlet cavity is opened in the middle of the base, a ring tube is installed on the top of the base, and the ring tube is connected with the other side of the conveying pipe through a baffle; an annular film blowing port is arranged on the top of the ring tube, and an outgoing air slot located on the outside of the ring tube is also opened inside the base, and the outgoing air slot is connected with the inner air outlet cavity.

[0007] As a further solution of the present invention: a conveying fan is also arranged below the melting barrel, and a plurality of air ducts are arranged at the output end of the conveying fan. The conveying fan is connected to the discharge pipe through the plurality of air ducts, and the air duct and the conveying pipe are arranged coaxially.

[0008] As a further solution of the present invention: a top cover is installed on the top of the melting barrel, a stirring motor is installed on the top of the top cover, a spiral shaft is arranged at the output end of the stirring motor, a feeding port is also opened on the top cover, and a control valve is also arranged on the top of the discharge pipe.

[0009] As a further solution of the present invention: a plurality of groups of first heating rods are arranged on the inner wall of the melting cylinder, a heating cavity is opened inside the conveying tube, and a second heating rod is arranged in the heating cavity.

[0010] As a further solution of the present invention: a fixed arm is fixedly provided on the middle inner wall of the conveying pipe, cantilevers are provided on both sides of the fixed arm, a driving column is movably provided in the middle of the cantilever, an engaging portion cooperating with the ratchet is provided at the top of the driving column, an extrusion portion is provided at the bottom of the driving column, and an eccentric block cooperating with the extrusion portion is provided in the middle of the rotating shaft.

[0011] As a further solution of the present invention: a symmetrical convex plate is arranged on the outer wall of the driving column, and the convex plate is connected to the cantilever through a return spring.

[0012] As a further solution of the present invention: a film blowing blower is installed at the bottom of the base, and the output end of the film blowing blower is located in the inner air outlet cavity; an installation cavity coaxial with the inner air outlet cavity is opened inside the base, and an adjustment structure for adjusting the air outlet volume of the inner air outlet cavity is installed in the installation cavity.

[0013] As a further solution of the present invention: the adjustment structure includes a bottom cover and a mounting cover, and air outlets are provided in the middle of the bottom cover and the mounting cover; multiple groups of sliding plates are slidably arranged inside the bottom cover, a tooth plate is fixedly arranged on the top of the sliding plate, and a fan-shaped adjustment plate for adjusting the air outlet is fixedly arranged on the inner side of the sliding plate.

[0014] As a further solution of the present invention: the top of the bottom cover is also rotatably provided with multiple groups of internal linkage gears meshing with the tooth plate, an upper convex ring is provided on the top inner wall of the mounting cover, and the top of the bottom cover is provided with a lower convex ring cooperating with the upper convex ring, a double gear ring is rotatably installed between the upper convex ring and the lower convex ring, and the inner side of the double gear ring is meshed with multiple groups of internal linkage gears.

[0015] As a further solution of the present invention: an air volume motor is also installed at the bottom of the bottom cover, and the output end of the air volume motor is connected to a driving gear, and the driving gear is meshed with the outer side of the double gear ring.

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

[0017] 1. The present invention can process multiple sets of equipment synchronously through multiple sets of conveying mechanisms and film blowing mechanisms, which improves work efficiency. Under the drive of the conveying fan and the molten material, the rotating shaft drives the eccentric block in the middle to rotate. At this time, the eccentric block intermittently squeezes the driving column and intermittently drives the ratchet through the meshing part, so that the scraping arm reciprocates and scrapes the inner wall of the conveying pipe to prevent the molten material from adhering to the inner wall after long-term use. This design is ingenious and effective, which improves the stability and practicality of the film blowing machine used for processing medicinal plastic packaging bags.

[0018] 2. The present invention can perform film blowing on the molten material inside the ring tube through the cooperation of the inner air outlet cavity and the outer air trough, and the air volume of the inner air outlet cavity can be further adjusted through the adjustment structure, so as to adjust the thickness of the film according to actual needs. When the driving gear drives the double gear ring to rotate counterclockwise, the fan-shaped adjustment plate will move inward and block the inner air outlet cavity. At this time, the air volume is reduced, thereby further increasing the thickness of the film. This design improves the degree of freedom and usage scenarios of the film blowing machine used for processing medicinal plastic packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 is a partial cross-sectional view of the present invention;

[0022] Figure 3 is a cross-sectional view of the conveying mechanism of the present invention;

[0023] Figure 4 yes Figure 3 A magnified view of the structure at center A;

[0024] Figure 5 It is the internal structure diagram of the conveying mechanism in the present invention;

[0025] Figure 6 It is a three-dimensional structural diagram of the film blowing mechanism in the present invention;

[0026] Figure 7 is a cross-sectional view of the base in the present invention;

[0027] Figure 8 It is the three-dimensional structure of the regulating structure in the present invention Figure 1 ;

[0028] Fig. 9 It is the three-dimensional structure of the regulating structure in the present invention Figure 2 ;

[0029] Fig.10 It is a cross-sectional view of the regulating structure in the present invention.

[0030] Description of reference numerals:

[0031] 1. Feeding mechanism; 101. Melting barrel; 102. Top cover; 103. Stirring motor; 104. Screw shaft; 105. First heating rod; 106. Feeding port; 107. Feeding pipe; 108. Control valve; 109. Delivery fan; 110. Air duct; 2. Delivery mechanism; 201. Delivery pipe; 202. Heating chamber; 203. Second heating rod; 204. Support plate; 205. Rotating shaft; 206. Fan blade; 207. Bearing; 208. Ratchet; 209. Scraping arm; 210. Fixed arm; 211. Cantilever; 212. Driving column; 213. Conveying plate; 214. Return spring; 215 , extrusion part; 216, meshing part; 217, eccentric block; 3, film blowing mechanism; 301, base; 302, protective cover; 303, film blowing fan; 304, baffle; 305, ring pipe; 306, film blowing port; 307, outgoing air slot; 308, inner air outlet cavity; 309, installation cavity; 310, adjustment structure; 311, bottom cover; 312, installation cover; 313, air outlet; 314, sliding plate; 315, tooth plate; 316, fan-shaped adjustment plate; 317, inner linkage gear; 318, upper convex ring; 319, lower convex ring; 320, double gear ring; 321, air volume motor; 322, driving gear. DETAILED DESCRIPTION

[0032] The following will be combined with the attached Figures 1 to 10 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0033] The present invention provides a film blowing machine for processing medicinal plastic packaging bags through improvement, such as Figure 1-Figure 10As shown, it includes a feeding mechanism 1, a conveying mechanism 2 and a film blowing mechanism 3. The feeding mechanism 1 includes a melting barrel 101, and the bottom of the melting barrel 101 is connected to a plurality of feeding tubes 107. The conveying mechanism 2 includes a horizontal conveying pipe 201, and the end of the feeding tube 107 is connected to one side of the conveying pipe 201. Symmetrical support plates 204 are arranged on the inner walls of both sides of the conveying pipe 201, and a rotating shaft 205 is rotatably installed between the support plates 204. Fan blades 206 are installed at both ends of the rotating shaft 205. Symmetrical bearings 207 are rotatably arranged on the inner wall of the conveying pipe 201, and the inner wall of the bearing 207 is provided with a A ratchet 208 is provided, and a scraping arm 209 for cleaning the inner wall of the conveying pipe 201 is fixedly provided on the side of the ratchet 208; the film blowing mechanism 3 includes a base 301 and a protective cover 302, an inner air outlet cavity 308 is provided in the middle of the base 301, a ring tube 305 is installed on the top of the base 301, and the ring tube 305 is connected to the other side of the conveying pipe 201 through the baffle 304; an annular film blowing port 306 is provided on the top of the ring tube 305, and an outgoing air slot 307 located on the outside of the ring tube 305 is also provided inside the base 301, and the outgoing air slot 307 is connected to the inner air outlet cavity 308.

[0034] In this embodiment: the film blowing machine for processing medicinal plastic packaging bags is mainly divided into three parts: a feeding mechanism 1, a conveying mechanism 2 and a film blowing mechanism 3. When the device is in use, the plastic melt particles are first added to the melt barrel 101 through the feeding port 106, and then the stirring motor 103 is started. After the first heating rod 105 melts the melt, the conveying fan 109 and the control valve 108 are turned on. At this time, the melt falls into the feeding pipe 107 and the conveying pipe 201 by gravity potential energy. Driven by the air duct 110 and the flow of the melt, the fan blades on both sides will drive the rotating shaft 205 to rotate, so that the eccentric block 217 on the rotating shaft 205 will intermittently squeeze the driving column 212. When the driving column 212 moves outward along the cantilever 211, the meshing part 216 will squeeze and drive the ratchet 208, so that the scraping arms 209 on both sides slowly step and rotate, so as to scrape and clean the melt with high viscosity. The molten material enters the baffle 304 and the annular tube 305 through the conveying pipe 201 . At this time, driven by the wind force of the outgoing air slot 307 and the inner air outlet cavity 308 , the molten material is blown upward through the film blowing port 306 to form a film.

[0035] See attached Figure 1 -Attached Figure 2 A conveying fan 109 is also provided below the melting barrel 101 , and a plurality of air ducts 110 are provided at the output end of the conveying fan 109 . The conveying fan 109 is connected to the discharge pipe 107 through the plurality of air ducts 110 , and the air duct 110 is coaxially arranged with the conveying pipe 201 .

[0036] In this embodiment, in order to promote the conveying of the molten material and the rotation of the rotating shaft 205, so as to further achieve scraping cleaning, a plurality of air ducts 110 are designed.

[0037] See attached Figure 1 -Attached Figure 2 A top cover 102 is installed on the top of the melting barrel 101, a stirring motor 103 is installed on the top of the top cover 102, a spiral shaft 104 is provided at the output end of the stirring motor 103, a feeding port 106 is also opened on the top cover 102, and a control valve 108 is also provided on the top of the discharge pipe 107.

[0038] In this embodiment, in order to heat all the molten materials uniformly, a spiral shaft 104 is designed. When all the molten materials are melted to a desired state, a control valve 108 is designed in order to control the material feeding and realize the film blowing.

[0039] See attached Figure 2 -Attached Figure 3 A plurality of first heating rods 105 are arranged on the inner wall of the melting cylinder 101 , a heating chamber 202 is opened inside the conveying tube 201 , and a second heating rod 203 is arranged in the heating chamber 202 .

[0040] In this embodiment, a first heating rod 105 is designed to heat the plastic particles, and a heating chamber 202 is designed to heat the molten material and keep it in a fluid state to avoid accidental solidification after the temperature drops.

[0041] See attached Figure 3 -Attached Figure 4 A fixed arm 210 is fixedly provided on the inner wall of the middle part of the conveying pipe 201, cantilevers 211 are provided on both sides of the fixed arm 210, a driving column 212 is movably provided in the middle part of the cantilever 211, a meshing portion 216 cooperating with the ratchet 208 is provided at the top of the driving column 212, an extrusion portion 215 is provided at the bottom of the driving column 212, and an eccentric block 217 cooperating with the extrusion portion 215 is provided in the middle part of the rotating shaft 205.

[0042] In this embodiment, in order to prevent a small amount of molten material from being attached to the inner wall of the conveying tube 201 after long-term use, a symmetrical bearing 207 is designed. Driven by the conveying fan 109 and the fan blades 206, the eccentric block 217 on the rotating shaft 205 will intermittently squeeze the driving column 212. When the driving column 212 moves outward along the cantilever 211, the meshing portion 216 will squeeze and drive the ratchet 208, so that the scraping arms 209 on both sides slowly step and rotate, thereby scraping and cleaning the molten material with high viscosity.

[0043] See attached Figure 3 -Attached Figure 4A symmetrical convex plate 213 is provided on the outer wall of the driving column 212 , and the convex plate 213 is connected to the cantilever 211 through a return spring 214 .

[0044] In this embodiment, when the eccentric block 217 is separated from the extrusion portion 215 , a reset spring 214 is designed to automatically reset the driving column 212 and thereby separate the meshing portion 216 from the ratchet 208 .

[0045] See attached Figure 6 -Attached Figure 7 A film blowing fan 303 is installed at the bottom of the base 301, and the output end of the film blowing fan 303 is located in the inner air outlet cavity 308; an installation cavity 309 coaxial with the inner air outlet cavity 308 is opened inside the base 301, and an adjustment structure 310 for adjusting the air output of the inner air outlet cavity 308 is installed in the installation cavity 309.

[0046] In this embodiment, the annular tube 305 is located between the inner air outlet cavity 308 and the outer air slot 307. Under the action of the film blowing fan 303, the air volume performs film blowing on the molten material from both the inner and outer sides.

[0047] See attached Figure 6 -Attached Figure 7 and attached Fig. 9 The adjustment structure 310 includes a bottom cover 311 and a mounting cover 312, and an air outlet 313 is provided in the middle of the bottom cover 311 and the mounting cover 312; a plurality of sliding plates 314 are slidingly provided inside the bottom cover 311, a tooth plate 315 is fixedly provided on the top of the sliding plate 314, and a fan-shaped adjustment plate 316 for adjusting the air outlet 313 is fixedly provided on the inner side of the sliding plate 314.

[0048] In this embodiment, in order to adjust the thickness of the film according to actual needs, thereby meeting the packaging requirements of different types of medicines, an adjustment structure 310 is designed to control the air output of the inner air outlet cavity 308 .

[0049] See attached Fig. 9 -Attached Fig.10 The top of the bottom cover 311 is also rotatably provided with multiple groups of internal linkage gears 317 meshing with the tooth plate 315, an upper convex ring 318 is provided on the inner wall of the top of the mounting cover 312, and a lower convex ring 319 cooperating with the upper convex ring 318 is provided on the top of the bottom cover 311. A double gear ring 320 is rotatably installed between the upper convex ring 318 and the lower convex ring 319, and the inner side of the double gear ring 320 meshes with the multiple groups of internal linkage gears 317.

[0050] In this embodiment: when the driving gear 322 drives the double gear ring 320 to rotate counterclockwise, the inner linkage gear 317 will also rotate counterclockwise. Driven by the inner linkage gear 317, the sliding plate 314 and the tooth plate 315 move inward, and the fan-shaped adjustment plate 316 will block the inner air outlet cavity 308, and the air volume will be reduced, thereby further increasing the thickness of the film. When the driving gear 322 drives the double gear ring 320 to rotate clockwise, the inner linkage gear 317 will also rotate clockwise. Driven by the inner linkage gear 317, the sliding plate 314 and the tooth plate 315 move outward, and the air volume will be increased, thereby reducing the thickness of the film.

[0051] See attached Figure 8 -Attached Fig. 9 An air volume motor 321 is also installed at the bottom of the bottom cover 311 , and an output end of the air volume motor 321 is connected to a driving gear 322 , which meshes with the outer side of the double gear ring 320 .

[0052] In this embodiment, in order to drive the double gear ring 320 to rotate and thus achieve air volume regulation, an air volume motor 321 structure is designed.

[0053] Working principle of the present invention: When the device is used, first, the plastic melt particles are added into the melt barrel 101 through the feed port 106, and then the stirring motor 103 is started. After the first heating rod 105 melts the melt, the conveying fan 109 and the control valve 108 are turned on. At this time, the melt falls into the discharge pipe 107 and the conveying pipe 201 by gravity potential energy. Driven by the air duct 110 and the flow of the melt, the fan blades on both sides will drive the rotating shaft 205 to rotate, so that the eccentric block 217 on the rotating shaft 205 will intermittently squeeze the driving column 212. When the driving column 212 moves outward along the cantilever 211, the meshing part 216 will squeeze and drive the ratchet 208, so that the scraping arms 209 on both sides slowly step and rotate, so as to scrape and clean the melt with high viscosity. The molten material enters the baffle 304 and the annular tube 305 through the conveying pipe 201 . At this time, driven by the wind force of the outgoing air slot 307 and the inner air outlet cavity 308 , the molten material is blown upward through the film blowing port 306 to form a film.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A film blowing machine for processing medicinal plastic packaging bags, comprising a feeding mechanism (1), a conveying mechanism (2) and a film blowing mechanism (3), characterized in that: The material discharge mechanism (1) comprises a melting barrel (101), the bottom of the melting barrel (101) is connected to a plurality of material discharge pipes (107), and the conveying mechanism (2) comprises a horizontal conveying pipe (201), the end of the material discharge pipe (107) is connected to one side of the conveying pipe (201); Symmetrical support plates (204) are arranged on the inner walls of both sides of the delivery tube (201); a rotating shaft (205) is rotatably mounted between the support plates (204); fan blades (206) are mounted on both ends of the rotating shaft (205); symmetrical bearings (207) are rotatably mounted on the inner wall of the delivery tube (201); ratchets (208) are arranged on the inner walls of the bearings (207); and scraping arms (209) for cleaning the inner wall of the delivery tube (201) are fixedly mounted on the sides of the ratchets (208); The film blowing mechanism (3) comprises a base (301) and a protective cover (302); an inner air outlet cavity (308) is provided in the middle of the base (301); a ring tube (305) is installed on the top of the base (301); the ring tube (305) is connected to the other side of the conveying pipe (201) through a baffle (304); an annular film blowing port (306) is provided on the top of the ring tube (305); an outer air outlet groove (307) is also provided on the inside of the base (301) and is located outside the ring tube (305); the outer air outlet groove (307) is connected to the inner air outlet cavity (308).

2. A film blowing machine for processing medicinal plastic packaging bags according to claim 1, characterized in that: A conveying fan (109) is also provided below the melting barrel (101), and a plurality of groups of air ducts (110) are provided at the output end of the conveying fan (109). The conveying fan (109) is connected to the discharge pipe (107) via the plurality of groups of air ducts (110), and the air ducts (110) and the conveying pipe (201) are coaxially arranged.

3. A film blowing machine for processing medicinal plastic packaging bags according to any one of claims 1-2, characterized in that: A top cover (102) is installed on the top of the melting barrel (101), a stirring motor (103) is installed on the top of the top cover (102), a spiral shaft (104) is provided at the output end of the stirring motor (103), a feeding port (106) is also provided on the top cover (102), and a control valve (108) is also provided on the top of the discharge pipe (107).

4. A film blowing machine for processing medicinal plastic packaging bags according to any one of claims 1-2, characterized in that: A plurality of groups of first heating rods (105) are arranged on the inner wall of the melting barrel (101), a heating chamber (202) is provided inside the conveying tube (201), and a second heating rod (203) is arranged in the heating chamber (202).

5. A film blowing machine for processing medicinal plastic packaging bags according to any one of claims 1-2, characterized in that: A fixed arm (210) is fixedly arranged on the inner wall of the middle part of the conveying pipe (201), cantilevers (211) are arranged on both sides of the fixed arm (210), a driving column (212) is movably arranged in the middle part of the cantilever (211), a meshing portion (216) cooperating with the ratchet (208) is arranged at the top of the driving column (212), an extrusion portion (215) is arranged at the bottom of the driving column (212), and an eccentric block (217) cooperating with the extrusion portion (215) is arranged in the middle part of the rotating shaft (205).

6. The film blowing machine for processing medicinal plastic packaging bags according to claim 5, characterized in that: A symmetrical convex plate (213) is provided on the outer wall of the driving column (212), and the convex plate (213) is connected to the cantilever (211) via a return spring (214).

7. A film blowing machine for processing medicinal plastic packaging bags according to any one of claims 1-2, characterized in that: A film blowing fan (303) is installed at the bottom of the base (301), and the output end of the film blowing fan (303) is located in the inner air outlet cavity (308); an installation cavity (309) coaxial with the inner air outlet cavity (308) is opened inside the base (301), and an adjustment structure (310) for adjusting the air output of the inner air outlet cavity (308) is installed in the installation cavity (309).

8. The film blowing machine for processing medicinal plastic packaging bags according to claim 7, characterized in that: The adjustment structure (310) comprises a bottom cover (311) and a mounting cover (312); an air outlet (313) is provided in the middle of the bottom cover (311) and the mounting cover (312); a plurality of sets of sliding plates (314) are slidably arranged inside the bottom cover (311); a tooth plate (315) is fixedly arranged on the top of the sliding plate (314); and a fan-shaped adjustment plate (316) for adjusting the air outlet (313) is fixedly arranged on the inner side of the sliding plate (314).

9. A film blowing machine for processing medicinal plastic packaging bags according to claim 8, characterized in that: The top of the bottom cover (311) is also rotatably provided with a plurality of groups of internal linkage gears (317) meshing with the toothed plate (315); an upper convex ring (318) is provided on the inner wall of the top of the mounting cover (312); the top of the bottom cover (311) is provided with a lower convex ring (319) cooperating with the upper convex ring (318); a double gear ring (320) is rotatably provided between the upper convex ring (318) and the lower convex ring (319); the inner side of the double gear ring (320 meshes with the plurality of groups of internal linkage gears (317).

10. The film blowing machine for processing medicinal plastic packaging bags according to claim 9, characterized in that: An air volume motor (321) is also installed at the bottom of the bottom cover (311); an output end of the air volume motor (321) is connected to a driving gear (322); and the driving gear (322) meshes with the outer side of the double gear ring (320).

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