A film blowing device and process for producing antibacterial food packaging bags

Abstract

The invention discloses a film blowing device and process for producing antibacterial food packaging bags, and relates to the technical field of packaging bags. The film blowing device for producing packaging bags comprises an equipment frame and an anti-fracture device; wherein a film blowing mechanism is fixedly installed on the surface of the equipment frame, a feeding mechanism is fixedly installed on the surface of the film blowing mechanism, a heating mechanism is fixedly installed on the surface of the feeding mechanism, a stretching mechanism is fixedly installed on the surface of the equipment frame, and a mounting plate is fixedly installed inside the equipment frame; wherein the anti-fracture device comprises a supporting plate, a sliding block, a receiving shaft, a receiving roller and a telescopic elastic rod; the film blowing device for producing packaging bags can avoid the film from being broken or torn due to excessive tension during the stretching process, while maintaining the stability of the tension, avoiding the tension from changing continuously during the stretching process, thereby making the thickness distribution of the film inconsistent, and improving the production efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bags, in particular to a film blowing device and process for producing antibacterial food packaging bags. Background Art

[0002] The film blowing device for producing food packaging bags is a device used to produce film materials required for food packaging bags. Its main function is to heat, plasticize and extrude plastic particles or granular raw materials into films, and to make films of required specifications and thicknesses through processes such as cooling, stretching and winding for use in making food packaging bags.

[0003] The patent with patent announcement number CN219769068U relates to a packaging bag film blowing device, including a supporting stand, a film blowing mold body is provided at the lower middle position inside the supporting stand, and an upper bracket is fixedly installed at the upper middle position inside the supporting stand, a turntable is rotatably installed at one side position of the bottom end of the upper bracket, and a sleeve is fixedly connected to the bottom end position of the turntable, and a guide ring plate is fixedly connected to one side position of the sleeve. The patent sets a guide ring plate, a turntable, a guide ring plate, a sleeve, a motor, a mold body and an upper bracket. When multiple guide ring plates realize low-speed rotary rotation operation, multiple guide ring plates that can change the direction of laterally blowing wind will weaken the lateral wind blowing directly to the film product through the uniform action of the first wind hole and the second wind hole, so as to prevent the film product disturbed by the lateral wind from adhering to the traction component due to residual heat during the upward pulling process.

[0004] In the above patent, the guide ring plate, turntable, guide ring plate, sleeve, motor, mold body and upper bracket are set to prevent the film product from being disturbed by the lateral wind and adhering to the traction components due to the residual heat during the pulling process. However, in the process of winding and stretching the film, excessive tension of the film may cause the film to break or tear, thereby causing production interruption and increasing production costs. For this reason, a film blowing device for producing antibacterial food packaging bags with tension adjustment function is designed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a film blowing device and process for producing antibacterial food packaging bags, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a film blowing device for producing antibacterial food packaging bags, including an equipment frame and an anti-fracture device; wherein a film blowing mechanism is fixedly installed on the surface of the equipment frame, a feeding mechanism is fixedly installed on the surface of the film blowing mechanism, a heating mechanism is fixedly installed on the surface of the feeding mechanism, a stretching mechanism is fixedly installed on the surface of the equipment frame, and a mounting plate is fixedly installed inside the equipment frame; wherein the anti-fracture device includes a support plate, a sliding block, a receiving shaft, a receiving roller and a telescopic elastic rod, and the feeding mechanism and the heating mechanism are started to evenly feed the material into the interior of the film blowing mechanism, and at the same time, the material is melted under the action of the heating mechanism. The film is extruded and blown into shape under the action of the film blowing mechanism, and then the stretching mechanism is started so that the film formed by the film blowing is stretched and rolled up under the action of the stretching mechanism. The support plate is fixedly installed above the mounting plate, and a slide groove 1 is provided on the surface of the support plate. The sliding block is slidably installed on the inner wall of the slide groove 1, and the receiving shaft is fixedly penetrated through the left and right walls of the sliding block. The receiving roller is rotatably installed on the circumferential surface of the receiving shaft. The telescopic elastic rod 1 is fixedly installed on the bottom of the inner wall of the slide groove 1, and the free end of the telescopic elastic rod 1 is fixedly connected to the sliding block. The receiving shaft moves downward to drive the sliding block to move downward, and the sliding block moves downward to squeeze the telescopic elastic rod 1 to contract, thereby reducing the tension by shortening the stretching distance.

[0007] According to the above technical solution, a second slide groove is provided on the surface of the sliding block, and a limiting rod is slidably installed inside the second slide groove. The end of the limiting rod away from the second slide groove is set as an arc surface one, and the inner wall of the first slide groove is provided with a limiting groove. The limiting rod contacts the limiting groove, and the limiting rod moves out of the limiting groove and contacts and limits with another limiting groove again, which can effectively maintain the stability of the tension during the stretching process of the film and avoid continuous changes in the tension during the stretching process.

[0008] According to the above technical solution, a telescopic elastic rod 2 is fixedly installed on the inner wall of the second slide groove, and the free end of the telescopic elastic rod 2 is fixedly connected to the limit rod. The telescopic elastic rod 2 can drive the limit rod to reset, and the limit rod resets and contacts the limit groove again to maintain the stability of the tension during the stretching process.

[0009] The lifting block is fixedly mounted on the circumferential surface of the supporting shaft, and the lifting block is slidably mounted on the inner wall of the sliding groove three. The driven shaft is fixedly passed through the left and right walls of the lifting block. The leveling roller is fixedly mounted on the circumferential surface of the driven shaft, the threaded strip is fixedly mounted on the circumferential surface of the leveling roller, the telescopic elastic rod three is fixedly mounted on the inner wall of the sliding groove three, and the free end of the telescopic elastic rod three is fixedly connected to the lifting block. The threaded strip rotates to contact the film and drives it to stretch toward the two ends of the leveling roller, which can effectively level the wrinkles generated during the film winding process and improve the film winding effect.

[0010] According to the above technical solution, a rotating rod is fixedly installed on the side of the leveling roller, and a receiving plate is fixedly installed on the side of the connecting plate. The rotation of the leveling roller drives the rotating rod to rotate, and the rotating rod rotates to contact the receiving plate and moves upward under the action of the receiving plate, so that the contact between the threaded strip and the film is loosened.

[0011] According to the above technical solution, two arc surfaces are opened on the top of the receiving plate, and two threaded strips are arranged. The threaded strips are made of rubber strips, which can improve the contact effect between the threaded strips and the film, so that the film is stretched toward the two ends of the leveling roller.

[0012] The lifting of the ...

[0013] According to the above technical solution, the upper part of the movable plate is set as an oblique surface. When the receiving shaft moves downward, it contacts and drives the movable plate to move away from the receiving shaft. A clockwork spring is arranged between the movable plate and the mounting plate, and the clockwork spring can drive the movable plate to reset.

[0014] A processing technology for producing a film blowing device for antibacterial food packaging bags, comprising:

[0015] Step 1: Start the feeding mechanism and the heating mechanism to evenly feed the material into the film blowing mechanism. At the same time, the material is melted under the action of the heating mechanism and extruded and blown into film under the action of the film blowing mechanism, and then stretched and rolled through the stretching mechanism;

[0016] Step 2: When the tension on the film is too large during the stretching process, the film will squeeze the receiving roller to move downward, and the receiving roller moves downward to drive the receiving shaft to move downward;

[0017] Step 3: The receiving shaft moves downward to drive the sliding block to move downward, and the sliding block moves downward to squeeze the telescopic elastic rod to shrink;

[0018] Step 4: The telescopic elastic rod contracts to reduce the tension by shortening the stretching distance, thereby avoiding excessive tension during the stretching process that may cause the film to break or tear.

[0019] The present invention provides a film blowing device for producing antibacterial food packaging bags. It has the following beneficial effects:

[0020] (1) In the film blowing device for producing antibacterial food packaging bags, when the film tension is too large during the film winding and stretching process, the receiving roller will be squeezed and the receiving shaft and the sliding block will be driven to move downward. The tension is reduced by squeezing the telescopic elastic rod to contract and shorten the stretching distance, thereby avoiding excessive tension during the stretching process that may cause the film to break or tear, thereby causing production interruption and increasing production costs. At the same time, the downward movement of the sliding block can maintain the stability of the tension under the action of the limit rod, thereby avoiding continuous changes in the tension during the stretching process, thereby causing inconsistent thickness distribution of the film, improving the production efficiency of the equipment, and reducing subsequent maintenance costs.

[0021] (2) In the film blowing device for producing antibacterial food packaging bags, the film contacts and drives the flattening roller to rotate during the stretching process. The rotation of the flattening roller drives the film to stretch toward the two ends of the flattening roller under the action of the threaded strip, which can effectively flatten the wrinkles generated during the film winding process. At the same time, the movement of the receiving shaft under the action of the connecting plate and the lifting block makes the flattening roller always move synchronously with the receiving roller. The rotation of the flattening roller realizes the indirect loosening of the threaded strip and the film through the rotating rod and the receiving plate, thereby preventing the film from being over-stretched under the action of the threaded strip, thereby affecting the appearance quality and smoothness of the film.

[0022] (3) In the film blowing device for producing antibacterial food packaging bags, the receiving shaft moves downward and drives the convergence shaft to move under the action of the moving plate and the pushing plate. The movement of the convergence shaft drives the convergence plate to rotate. The rotation of the convergence plate adjusts the convergence angle of the film to reduce the convergence angle of the film and avoid incomplete discharge of air inside the film during the convergence process due to the shortening of the convergence distance. At the same time, the rotation of the convergence plate drives the connecting rod and the sliding table to move, maintain stability during the rotation process, and improve the convergence effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the position structure of the mounting plate and the stretching mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the position structure of the support plate and the sliding block of the present invention;

[0026] Figure 4 It is a schematic diagram of the position structure of the sliding block and the limiting rod of the present invention;

[0027] Figure 5 This is a schematic diagram of the position structure of the receiving shaft and the connecting plate of the present invention;

[0028] Figure 6 For the present invention Figure 5 The enlarged structural diagram of part A in the middle;

[0029] Figure 7 It is a schematic diagram of the position structure of the moving plate and the push plate of the present invention.

[0030] In the figure: 1. Equipment frame; 2. Film blowing mechanism; 3. Feeding mechanism; 4. Heating mechanism; 5. Stretching mechanism; 6. Mounting plate; 7. Support plate; 8. Sliding block; 9. Attaching shaft; 10. Attaching roller; 11. Telescopic elastic rod one; 12. Limiting rod; 13. Telescopic elastic rod two; 141. Connecting plate; 142. Lifting block; 143. Driven shaft; 144. Leveling roller; 145. Threaded strip; 146. Telescopic elastic rod three; 147. Rotating rod; 148. Attaching plate; 151. Bending plate; 152. Bending shaft; 153. Bending roller; 154. Connecting rod; 155. Sliding table; 156. Moving plate; 157. Push plate. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-Figure 4 One embodiment of the present invention is: a film blowing device for producing antibacterial food packaging bags, including an equipment frame 1, and also including an anti-fracture device; wherein a film blowing mechanism 2 is fixedly installed on the surface of the equipment frame 1, a feeding mechanism 3 is fixedly installed on the surface of the film blowing mechanism 2, a heating mechanism 4 is fixedly installed on the surface of the feeding mechanism 3, a stretching mechanism 5 is fixedly installed on the surface of the equipment frame 1, and a mounting plate 6 is fixedly installed inside the equipment frame 1; wherein the anti-fracture device includes a support plate 7, a sliding block 8, a receiving shaft 9, a receiving roller 10 and a telescopic elastic rod 11, the support plate 7 is fixedly installed above the mounting plate 6, and the support plate 7 A slide groove 1 is provided on the surface, and a sliding block 8 is slidably installed on the inner wall of the slide groove 1. A receiving shaft 9 is fixedly passed through the left and right walls of the sliding block 8. A receiving roller 10 is rotatably installed on the circumferential surface of the receiving shaft 9. A telescopic elastic rod 11 is fixedly installed on the bottom of the inner wall of the slide groove 1. The free end of the telescopic elastic rod 11 is fixedly connected to the sliding block 8. The receiving shaft 9 moves downward to drive the sliding block 8 to move downward. The sliding block 8 moves downward to squeeze the telescopic elastic rod 11 to contract. The tension is reduced by shortening the stretching distance to avoid excessive tension during the stretching process, which may cause the film to break or tear, thereby causing production interruption and increasing production costs.

[0033] A second slide groove is provided on the surface of the sliding block 8, and a limiting rod 12 is slidably installed inside the second slide groove. The end of the limiting rod 12 away from the second slide groove is set as an arc surface 1, and a limiting groove is provided on the inner wall of the first slide groove. The limiting rod 12 contacts the limiting groove. The limiting rod 12 moves out of the limiting groove and contacts and limits with another limiting groove again, which can effectively maintain the stability of the tension during the stretching process of the film and avoid continuous changes in the tension during the stretching process.

[0034] A telescopic elastic rod 13 is fixedly installed on the inner wall of the second slide groove, and the free end of the telescopic elastic rod 13 is fixedly connected to the limit rod 12. The telescopic elastic rod 13 can drive the limit rod 12 to reset, and the limit rod 12 resets and contacts the limit groove again to maintain the stability of the tension during the stretching process.

[0035] When the present embodiment is working, the feeding mechanism 3 and the heating mechanism 4 are started to feed the material evenly into the interior of the film blowing mechanism 2. At the same time, the material is melted under the action of the heating mechanism 4 and extruded and formed by film blowing under the action of the film blowing mechanism 2. Then, the stretching mechanism 5 is started to stretch and reel the film formed by film blowing under the action of the stretching mechanism 5. During the reeling and stretching process, the formed film passes through the receiving roller 10 and drives it to rotate. When the tension on the film is too large during the stretching process, the film will squeeze the receiving roller 10 to move downward. The receiving roller 10 moves downward to drive the receiving shaft 9 to move downward. The receiving shaft 9 moves downward to drive the sliding The movable block 8 moves downward, and the sliding block 8 moves downward to squeeze the telescopic elastic rod 11 to contract, thereby reducing the tension by shortening the stretching distance, thereby avoiding excessive tension in the stretching process, which may cause the film to break or tear, thereby causing production interruption and increasing production costs. At the same time, the sliding block 8 drives the limit rod 12 to move during its movement, and the limit rod 12 moves out of the limit groove and re-contacts and limits with another limit groove, which can effectively maintain the stability of the tension during the stretching process of the film, avoid continuous changes in the tension during the stretching process, thereby causing inconsistent thickness distribution of the film, improving the production efficiency of the equipment, and reducing subsequent maintenance costs.

[0036] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a flattening device for improving the flatness of the film is provided on the surface of the support plate 7, and also includes a convergence device, the flattening device includes a connecting plate 141, a lifting block 142, a driven shaft 143, a flattening roller 144, a threaded strip 145 and a telescopic spring rod 146, the connecting plate 141 is fixedly mounted on the circumferential surface of the receiving shaft 9, a sliding groove 3 is provided on the surface of the connecting plate 141, the lifting block 142 is slidably mounted on the inner wall of the sliding groove 3, and the driven shaft 143 is fixedly passed through the left and right walls of the lifting block 142, the leveling roller 144 is fixedly installed on the circumferential surface of the driven shaft 143, the threaded strip 145 is fixedly installed on the circumferential surface of the leveling roller 144, the telescopic elastic rod three 146 is fixedly installed on the inner wall of the slide groove three, the free end of the telescopic elastic rod three 146 is fixedly connected to the lifting block 142, the threaded strip 145 rotates to contact the film and drive it to stretch toward the two ends of the leveling roller 144, which can effectively level the wrinkles generated during the film winding process and improve the film winding effect.

[0037] A rotating rod 147 is fixedly installed on the side of the leveling roller 144, and a receiving plate 148 is fixedly installed on the side of the connecting plate 141. The leveling roller 144 drives the rotating rod 147 to rotate during rotation. The rotating rod 147 rotates to contact the receiving plate 148 and moves upward under the action of the receiving plate 148, so that the contact between the threaded strip 145 and the film is loosened, thereby preventing the film from being over-stretched under the action of the threaded strip 145, thereby affecting the appearance quality and smoothness of the film.

[0038] The upper part of the receiving plate 148 is provided with two arc surfaces, and the thread strips 145 are made of rubber strips. The rubber strips can improve the contact effect between the thread strips 145 and the film, so that the film is stretched toward the two ends of the leveling roller 144.

[0039] The focusing device includes a focusing plate 151, a focusing shaft 152, a focusing roller 153, a connecting rod 154, a sliding platform 155, a moving plate 156 and a pushing plate 157. A focusing groove is provided on the surface of the mounting plate 6. The focusing plate 151 is rotatably mounted on the side wall of the focusing groove. The focusing shaft 152 is fixedly passed through the left and right walls of the focusing plate 151. The focusing roller 153 is rotatably mounted on the circumferential surface of the focusing shaft 152. The connecting rod 154 is rotatably mounted below the focusing plate 151. The sliding platform 155 is slidably mounted below the mounting plate 6. Plate 156 is slidably installed above the mounting plate 6, and the push plate 157 is fixedly installed on the side of the movable plate 156. The end of the connecting rod 154 away from the focusing plate 151 is rotatably connected to the sliding table 155. The focusing shaft 152 moves to drive the focusing plate 151 to rotate. The focusing plate 151 rotates to adjust the focusing angle of the film, thereby reducing the focusing angle of the film and avoiding incomplete discharge of air inside the film during the focusing process due to the shortening of the focusing distance, thereby effectively reducing the possibility of wrinkles or wrinkles on the surface of the film, thereby improving the appearance quality of the film.

[0040] The top of the movable plate 156 is set as a bevel surface. When the receiving shaft 9 moves downward, it contacts and drives the movable plate 156 to move away from the receiving shaft 9. A clockwork spring is set between the movable plate 156 and the mounting plate 6, and the clockwork spring can drive the movable plate 156 to reset.

[0041] When this embodiment is working, the film contacts the leveling roller 144 during stretching and drives it to rotate. The rotation of the leveling roller 144 drives the threaded strip 145 to rotate. The threaded strip 145 rotates to contact the film and drives it to stretch toward the two ends of the leveling roller 144, which can effectively level the wrinkles generated during the film winding process and improve the film winding effect. At the same time, the receiving shaft 9 moves downward to drive the connecting plate 141 to move downward, the connecting plate 141 moves downward to drive the lifting block 142 to move downward, the lifting block 142 moves downward to drive the driven shaft 143 to move downward, and the driven shaft 143 moves downward to drive the leveling roller 144 to move downward, so that the leveling roller 144 always moves synchronously with the receiving roller 10 The film is leveled by the rotation of the leveling roller 144. The rotation of the leveling roller 144 drives the rotating rod 147 to rotate. The rotating rod 147 rotates to contact the receiving plate 148 and moves upward under its action. The rotating rod 147 moves upward to drive the leveling roller 144 to move upward, and under the action of the driven shaft 143, the lifting block 142 is driven to move upward and squeeze the telescopic elastic rod three 146. The telescopic elastic rod three 146 is squeezed and drives the lifting block 142 to reset and move downward, thereby realizing the up and down swinging of the leveling roller 144 and the threaded strip 145, so that the threaded strip 145 is loose in contact with the film, thereby avoiding the film from being over-stretched under the action of the threaded strip 145, thereby affecting the appearance quality and smoothness of the film.

[0042] During the convergence process of the film, it contacts the convergence roller 153 and drives it to rotate, and gradually converges under the action of the convergence plate 151. The convergence angle gradually decreases, so that the film can be converged more evenly during the extrusion process. When the receiving shaft 9 moves downward, it contacts and drives the moving plate 156 to move away from the receiving shaft 9. The movement of the moving plate 156 drives the push plate 157 to move. The push plate 157 moves to contact and drive the convergence shaft 152 to move. The movement of the convergence shaft 152 drives the convergence plate 151 to rotate. The convergence plate 151 rotates to adjust the convergence angle of the film. , reducing the convergence angle of the film, avoiding the shortening of the convergence distance resulting in incomplete discharge of air inside the film during the convergence process, thereby increasing the stress inside the film, which may cause the film to deform or rupture during subsequent processing or use, and effectively reducing the possibility of wrinkles or wrinkles on the surface of the film, thereby improving the appearance quality of the film. At the same time, the rotation of the convergence plate 151 drives the connecting rod 154 to move, and the movement of the connecting rod 154 drives the sliding table 155 to move, and the movement of the sliding table 155 maintains the stability of the convergence plate 151 during rotation, thereby improving the convergence effect.

[0043] 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 film blowing device for producing antibacterial food packaging bags, comprising an equipment frame (1), characterized in that: It also includes an anti-breakage device and a tightening device; Wherein, a film blowing mechanism (2) is fixedly mounted on the surface of the equipment frame (1), a feeding mechanism (3) is fixedly mounted on the surface of the film blowing mechanism (2), a heating mechanism (4) is fixedly mounted on the surface of the feeding mechanism (3), a stretching mechanism (5) is fixedly mounted on the surface of the equipment frame (1), and a mounting plate (6) is fixedly mounted inside the equipment frame (1); The anti-fracture device comprises a support plate (7), a sliding block (8), a receiving shaft (9), a receiving roller (10) and a telescopic elastic rod (11); the support plate (7) is fixedly mounted above the mounting plate (6); a sliding groove (1) is provided on the surface of the support plate (7); the sliding block (8) is slidably mounted on the inner wall of the sliding groove (1); the receiving shaft (9) is fixedly passed through the left and right walls of the sliding block (8); the receiving roller (10) is rotatably mounted on the circumferential surface of the receiving shaft (9); the telescopic elastic rod (11) is fixedly mounted on the bottom of the inner wall of the sliding groove (1); and the free end of the telescopic elastic rod (11) is fixedly connected to the sliding block (8); Wherein, the surface of the support plate (7) is provided with a leveling device for improving the flatness of the film; The focusing device comprises a focusing plate (151), a focusing shaft (152), a focusing roller (153), a connecting rod (154), a sliding platform (155), a movable plate (156) and a push plate (157); a focusing groove is provided on the surface of the mounting plate (6); the focusing plate (151) is rotatably mounted on the side wall of the focusing groove; the focusing shaft (152) is fixedly passed through the left and right walls of the focusing plate (151); the focusing roller (153) is rotatably mounted on the circumferential surface of the focusing shaft (152); the connecting rod (154) is rotatably mounted below the focusing plate (151); the sliding platform (155) is slidably mounted below the mounting plate (6); the movable plate (156) is slidably mounted above the mounting plate (6); the push plate (157) is fixedly mounted on the side of the movable plate (156); and the end of the connecting rod (154) away from the focusing plate (151) is rotatably connected to the sliding platform (155); The upper portion of the movable plate (156) is provided with an oblique cut surface, and a spring is provided between the movable plate (156) and the mounting plate (6).

2. The film blowing device for producing antibacterial food packaging bags according to claim 1, characterized in that: A second slide groove is provided on the surface of the sliding block (8), a limiting rod (12) is slidably installed inside the second slide groove, an end of the limiting rod (12) away from the second slide groove is arranged as an arc surface one, a limiting groove is provided on the inner wall of the first slide groove, and the limiting rod (12) is in contact with the limiting groove.

3. The film blowing device for producing antibacterial food packaging bags according to claim 2 is characterized in that: A second telescopic elastic rod (13) is fixedly mounted on the inner wall of the second slide groove, and a free end of the second telescopic elastic rod (13) is fixedly connected to the limiting rod (12).

4. The film blowing device for producing antibacterial food packaging bags according to claim 3 is characterized in that: The leveling device comprises a connecting plate (141), a lifting block (142), a driven shaft (143), a leveling roller (144), a threaded strip (145) and a telescopic elastic rod three (146), wherein the connecting plate (141) is fixedly mounted on the circumferential surface of the receiving shaft (9), a sliding groove three is provided on the surface of the connecting plate (141), the lifting block (142) is slidably mounted on the inner wall of the sliding groove three, the driven shaft (143) is fixedly penetrated through the left and right walls of the lifting block (142), the leveling roller (144) is fixedly mounted on the circumferential surface of the driven shaft (143), the threaded strip (145) is fixedly mounted on the circumferential surface of the leveling roller (144), the telescopic elastic rod three (146) is fixedly mounted on the inner wall of the sliding groove three, and the free end of the telescopic elastic rod three (146) is fixedly connected to the lifting block (142).

5. The film blowing device for producing antibacterial food packaging bags according to claim 4, characterized in that: A rotating rod (147) is fixedly mounted on the side of the leveling roller (144), and a receiving plate (148) is fixedly mounted on the side of the connecting plate (141).

6. The film blowing device for producing antibacterial food packaging bags according to claim 5, characterized in that: The upper portion of the receiving plate (148) is provided with two arc surfaces, and the threaded strips (145) are provided with two threads, and the threaded strips (145) are made of rubber strips.

7. The processing technology of the film blowing device for producing antibacterial food packaging bags according to claim 6 is characterized in that: include: Step 1: Start the feeding mechanism (3) and the heating mechanism (4) to evenly feed the material into the film blowing mechanism (2); at the same time, the material is melted under the action of the heating mechanism (4) and extruded and blown into film under the action of the film blowing mechanism (2); and then stretched and rolled through the stretching mechanism (5); Step 2: When the tension on the film is too great during the stretching process, the film will squeeze the receiving roller (10) to move downward, and the receiving roller (10) will move downward, driving the receiving shaft (9) to move downward; Step 3: The receiving shaft (9) moves downward, driving the sliding block (8) to move downward, and the sliding block (8) moves downward to squeeze the telescopic elastic rod 1 (11) to shrink; Step 4: The telescopic elastic rod 1 (11) contracts to reduce the tension by shortening the stretching distance, thereby preventing the film from breaking or tearing due to excessive tension during the stretching process.

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