Sealing and cutting heat shrink packaging machine with rear knife rest

Abstract

The utility model relates to the technical field of thermal shrinkage packaging equipment, in particular to a sealing and cutting thermal shrinkage packaging machine with a rear knife rest, which comprises a main body part, a front conveying line, a rear conveying line, a film cutting part, a longitudinal sealing component, a waste film winding component and a film guiding part, the film cutting part comprises a T-shaped frame, a lifting plate, a vertical mounted bearing, a sealing cutter upper assembly, a sealing cutter lower assembly, a servo transmission shaft, a sealing cutter lower bolt assembly, a cutter rest outer frame welding part, a cutter rest inner frame welding part, a sliding bearing seat, a sealing cutter guide frame rod, a servo driving chain wheel, a second supporting assembly, a motor mounting metal plate, a servo motor, a motor synchronous belt wheel and a wheel shaft seat pulling plate. According to the packaging film sealing and cutting device, the servo transmission assembly in the film cutting part is arranged, servo transmission control is conducted on the sealing cutter upper assembly and the sealing cutter lower assembly through the chain, so that a packaging film is sealed and cut, the height capable of passing through a product is greatly increased, and then the effect of increasing the sealing and cutting height is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat shrinkage packaging equipment technical field especially relates to a rear knife rest seal cutting heat shrinkage packaging machine. BACKGROUND

[0002] The working principle of the heat shrinkage packaging machine is to utilize the heat shrinkage of the heat shrinkage film, to shrink the film after wrapping the articles through the heating equipment, to tightly adhere to the product, so as to achieve the purpose of packaging, the film material used by the heat shrinkage packaging machine has multiple kinds, including PE film, PVC, POF film and the like, different materials are suitable for different types of product packaging requirements.

[0003] The Chinese patent with the publication number CN222311107U discloses a heat shrinkage packaging machine, wherein the seal cutting unit adopts a cylinder and a rack to brake, so as to achieve the seal cutting effect, but the use of cylinder braking will limit the seal cutting height by the cylinder stroke, and further limit the height of the product, which cannot meet the higher production demand. UTILITY MODEL CONTENTS

[0004] The utility model provides a rear knife rest seal cutting heat shrinkage packaging machine.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A post tool holder seal cutting heat shrink packaging machine, comprising a side sealing machine and a heat shrink oven, the side sealing machine comprising a main body part, a front conveying line, a rear conveying line, a film cutting part, a longitudinal sealing assembly, a waste film winding assembly, a film guiding part, characterized in that: the film cutting part comprises a T-shaped frame, a lifting plate, a vertical belt bearing, an upper sealing knife assembly, a lower sealing knife assembly, a servo drive shaft, a lower sealing knife bolt assembly, a knife holder outer frame welding, a knife holder inner frame welding, a sliding bearing seat, a sealing knife guide frame rod, a servo driving sprocket, a support assembly two, a motor mounting sheet metal, a servo motor, a motor synchronous pulley, an axle seat pull plate, a transmission shaft synchronous pulley, a locking tooth, the two sides of the knife holder inner frame welding are connected with the sealing knife guide frame rod through the sliding bearing seat, the lower end of the knife holder inner frame welding is connected with a pair of support assembly two through the threads on the lifting plate, the lower end of the T-shaped frame is fixedly connected with the bottom of the knife holder inner frame welding, the T-shaped frame is connected with the upper end of the support assembly one through the threads on the lifting plate, the transmission shaft synchronous pulley is connected with the servo drive shaft through a flat key, the vertical belt bearing is rotationally connected with the servo drive shaft, the bottom of the vertical belt bearing is connected with the T-shaped frame through a bolt, the two ends of the servo drive shaft are connected with the driving sprocket through screws, the bottom of the motor mounting sheet metal is connected with the T-shaped frame through a bolt, the servo motor is connected with the motor mounting sheet metal through a screw, the motor synchronous pulley is installed on the output end of the servo motor through a flat key, the motor synchronous pulley and the transmission shaft synchronous pulley are connected through a synchronous belt for transmission, the lower sealing knife assembly is located above the servo drive shaft, the upper sealing knife assembly is located above the lower sealing knife assembly, the two ends of the lower sealing knife assembly and the upper sealing knife assembly are connected with the servo linkage assembly through bolts, the servo linkage assembly comprises an inner guide frame rod, an aluminum bearing seat, a chain locking block, a guide rod mounting seat, a driven sprocket shaft seat, and a servo driven sprocket, the upper and lower ends of the inner guide frame rod are connected with the guide rod mounting seat through bolts, the guide rod mounting seat is connected with the knife holder inner frame welding through a bolt, the aluminum bearing seat is installed on the guide rod in opposite directions, the front end of the aluminum bearing seat is connected with the chain locking block through a bolt, the driven sprocket shaft seat is located above the guide rod, the driven sprocket shaft seat is connected with the knife holder inner frame welding through a bolt, the servo driven sprocket is connected with the inside end of the driven sprocket shaft seat through a screw and a washer, the servo driven sprocket and the servo driving sprocket are connected through a chain for transmission, the chain passes through the chain locking block and the aluminum bearing seat, and is locked through the locking tooth in the inside of the chain locking block.

[0007] Further, the right side of the film cutting part is fixedly connected with the left end of the main body part, the front conveying line is located on the upper side of the main body part, and the bottom of the front conveying line is connected with the main body part through a sliding seat.

[0008] Further, the rear conveying line is located on the left side of the front conveying line, the bottom of the rear conveying line is connected with the main body part through a sliding seat, the longitudinal sealing assembly is located on the front side of the rear conveying line, and the lower end of the longitudinal sealing assembly is fixedly connected with the front side of the rear conveying line through a square tube and a profile.

[0009] Further, the waste film winding assembly is located in the main body part, the waste film winding assembly is fixed to the inner front side of the main body part, the film guide part is located on the rear side of the main body part, and the frame of the film guide part is fixedly connected with the rear side of the main body part.

[0010] Further, the heat shrinkage furnace comprises a lower box weld, an upper box weld, an inner liner galvanized sheet weld, a vertical beam baffle, an electric box weld, a single-phase asynchronous fan, a narrow vertical bearing seat, a heating furnace driving roller assembly, a heating furnace driven roller assembly, a transmission rod, an upper box cover, temperature insulation cloth, a temperature insulation cloth pressing plate, a speed regulation motor, a motor mounting rack and a motor chain wheel.

[0011] Further, the bottom of the upper box weld is fixedly connected with the lower box weld, the two ends of the upper box weld are connected with the vertical beam baffle through bolts, and the inner part of the upper box weld is provided with the inner liner galvanized sheet weld.

[0012] Further, the upper end of the upper box weld is connected with the upper box cover through bolts, the upper end of the upper box cover is connected with a pair of single-phase asynchronous fans through bolts, the electric box weld is located on the right side of the pair of single-phase asynchronous fans, and the bottom of the electric box weld is connected with the upper box cover through bolts.

[0013] Further, the two sides of the upper box weld are provided with temperature insulation cloth, and the upper end of the temperature insulation cloth is connected with the upper box weld through the temperature insulation cloth pressing plate and bolts.

[0014] Further, the heating furnace driving roller assembly is located on the left side of the upper box weld, the two ends of the heating furnace driving roller assembly are connected with the lower box weld through narrow vertical bearing seats, the heating furnace driven roller assembly is located on the right side of the upper box weld, the two ends of the heating furnace driven roller assembly are connected with the lower box weld through narrow vertical bearing seats, and the two sides of the heating furnace driving roller assembly and the heating furnace driven roller assembly are connected through chains for transmission.

[0015] Further, the motor mounting rack is connected with the lower box weld through bolts, the speed regulation motor is connected with the motor mounting rack through bolts, the speed regulation chain wheel is connected with the output end of the speed regulation motor through a key, the speed regulation chain wheel is connected with the heating furnace driving roller assembly through chains for transmission, a plurality of transmission rods are arranged between the chains, the two ends of the plurality of transmission rods are connected with the chains through bolts, and the plurality of transmission rods are evenly arranged between the chains.

[0016] Beneficial effects: By setting the servo drive assembly in the film cutting part, and the servo drive shaft and the servo driving sprocket, the movement of the chain is controlled through the servo motor, so that the chain drives the up and down movement of the aluminum part bearing seat, and the upper assembly and the lower assembly of the sealing knife are servo controlled, the distance between the upper assembly and the lower assembly of the sealing knife is maximized, so as to cut and seal the packaging film, greatly increase the cutting and sealing height, and then achieve the effect of increasing the height of the through product, meet the higher production demand. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of the edge sealing machine of the utility model;

[0019] Figure 3 is a schematic diagram of the three-dimensional structure of the film cutting part of the utility model Figure 1 ;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of the film cutting part of the utility model Figure 2 ;

[0021] Figure 5 is a right view of the film cutting part of the utility model;

[0022] Figure 6 is a schematic diagram of the three-dimensional structure of the servo linkage assembly of the film cutting part of the utility model;

[0023] Figure 7 is a schematic diagram of the three-dimensional structure of the chain locking block of the film cutting part of the utility model;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of the waste film winding assembly of the utility model;

[0025] Figure 9 is a schematic diagram of the three-dimensional structure of the heat shrinkage furnace of the utility model Figure 1 ;

[0026] Figure 10 is a schematic diagram of the three-dimensional structure of the heat shrinkage furnace of the utility model Figure 2 ;

[0027] Figure 11 is a schematic diagram of the three-dimensional structure of the liner galvanized sheet welding of the utility model;

[0028] Reference signs:

[0029] 1, edge sealing machine, 2, heat shrinkage furnace;

[0030] 101 main body part, 102 front conveying line, 103 rear conveying line, 104 film cutting part, 105 longitudinal sealing assembly, 106 waste film winding assembly, 107 film guiding part;

[0031] 10401 T-shaped frame, 10402 lifting plate, 10403 vertical bearing with seat, 10404 upper knife sealing assembly, 10405 lower knife sealing assembly, 10406 servo driving shaft, 10408 outer frame welding of knife holder, 10409 inner frame welding of knife holder, 10410 sliding bearing seat, 10411 knife sealing guide frame rod, 10412 inner guide frame rod, 10413 aluminum bearing seat, 10414 servo driving sprocket, 10415 chain locking block, 10416 guide rod mounting seat, 10417 driven sprocket shaft seat, 10418 servo driven sprocket, 10419 support assembly two, 10420 motor mounting sheet metal, 10421 servo motor, 10422 motor synchronous pulley, 10423 wheel shaft seat pull plate, 10424 transmission shaft synchronous pulley, 10425 locking teeth;

[0032] 201 lower box welding, 202 upper box welding, 203 inner container galvanized sheet welding, 204 vertical beam baffle, 205 electric box welding, 206 single-phase asynchronous fan, 207 narrow vertical bearing seat, 208 heating furnace driving roller assembly, 209 heating furnace driven roller assembly, 211 upper box cover, 212 temperature insulation cloth, 213 temperature insulation cloth pressing plate, 214 speed regulating motor, 215 motor mounting frame, 216 speed regulating sprocket. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] Reference Figures 1-3The utility model provides a kind of rear knife rest seal cut hot shrinkage packaging machine, including edge sealing machine 1 and hot shrinkage furnace 2, the edge sealing machine 1 includes main body portion 101, front conveying line 102, rear conveying line 103, film cutting portion 104, longitudinal seal assembly 105, waste film winding assembly 106, film guide portion 107, it is characterized by: the film cutting portion 104 includes T-shaped frame 10401, lifting plate 10402, vertical belt seat bearing 10403, seal knife upper assembly 10404, seal knife lower assembly 10405, servo drive shaft 10406, seal knife lower bolt assembly 10407, knife rest outer frame welding 10408, knife rest inner frame welding 10409, sliding bearing seat 10410, seal knife guide frame rod 10411, servo driving sprocket 10414, support assembly two 10419, motor mounting sheet metal 10420, servo motor 10421, motor synchronous pulley 10422, wheel shaft seat pull plate 10423, transmission shaft synchronous pulley 10424, locking teeth 10425, the seal knife guide frame rod 10411 both ends are fixedly connected with knife rest outer frame welding 10408, the knife rest inner frame welding both sides are connected with seal knife guide frame rod 10411 by sliding bearing seat 10410, the lower end of the knife rest inner frame welding 10409 is connected with a pair of support assembly two 10419 by screw thread on lifting plate 10402, the lower end of the T-shaped frame 10401 is fixedly connected with the bottom of the knife rest inner frame welding 10409, the T-shaped frame 10401 is connected with the upper end of support assembly one by screw thread on lifting plate 10402, the transmission shaft synchronous pulley 10424 is coupled with servo drive shaft 10406 by means of key, the vertical belt seat bearing 10403 is rotationally connected with servo drive shaft 10406, the bottom of the vertical belt seat bearing 10403 is connected with T-shaped frame 10401 by bolt, the both ends of the servo drive shaft 10406 are connected with driving sprocket by screw, the bottom of the motor mounting sheet metal 10420 is connected with T-shaped frame 10401 by bolt, the servo motor 10421 is connected with motor mounting sheet metal 10420 by screw, the motor synchronous pulley 10422 is installed on the output end of the servo motor 10421 by means of key, the motor synchronous pulley 10422 is connected with transmission shaft synchronous pulley 10424 by synchronous belt and is driven, the seal knife lower assembly 10405 is located above servo drive shaft 10406, the seal knife upper assembly 10404 is located above seal knife lower assembly 10405, the both ends of the seal knife lower assembly 10405 and seal knife upper assembly 10404 are connected with servo linkage assembly by bolt, the servo linkage assembly includes inner guide frame rod 10412, aluminum bearing seat 10413, chain locking block 10415, guide rod mounting seat 10416, driven sprocket shaft seat 10417, servo driven sprocket 10418, the both ends of the inner guide frame rod 10412 are connected with guide rod mounting seat 10416 by bolt, the guide rod mounting seat 10416 is connected with knife rest inner frame welding 10409 by bolt,The aluminum bearing seat 10413 is installed in opposite directions on the guide rod, the front end of the aluminum bearing seat 10413 is connected with the chain locking block 10415 through bolts, the driven sprocket shaft seat 10417 is connected with the inner frame welding 10409 of the tool holder through bolts, the wheel shaft seat pull plate 10423 is located below the driven sprocket shaft seat 10417, the upper side of the wheel shaft seat pull plate 10423 is connected with the lower end of the driven sprocket shaft seat 10417 through long screws, the wheel shaft seat pull plate 10423 is fixedly connected with the inner frame welding 10409 of the tool holder through bolts, the servo driven sprocket 10418 is connected with the inner side end of the driven sprocket shaft seat 10417 through screws and washers, the servo driven sprocket 10418 is connected with the servo driving sprocket 10414 through a chain for transmission, the chain passes through the chain locking block 10415 and the aluminum bearing seat 10413, and is locked through the locking teeth 10425 in the inner side of the chain locking block 10415.

[0036] Referring to Figures 4-8 , the film cutting part 104 is fixedly connected with the left end of the main body part 101, the front conveying line 102 is located on the upper side of the main body part 101, and the bottom of the front conveying line 102 is connected with the main body part 101 through a sliding seat.

[0037] The rear conveying line 103 is located on the left side of the front conveying line 102, the bottom of the rear conveying line 103 is connected with the main body part 101 through a sliding seat, the longitudinal sealing assembly 105 is located on the front side of the rear conveying line 103, and the lower end of the longitudinal sealing assembly 105 is fixedly connected with the front side of the rear conveying line 103 through a square tube and a profile.

[0038] The waste film winding assembly 106 is located in the main body part 101, the waste film winding assembly 106 is fixedly connected with the inside front side of the main body part 101, the film guide part 107 is located on the rear side of the main body part 101, and the frame of the film guide part 107 is fixedly connected with the rear side of the main body part 101.

[0039] Referring to Figures 9-11 , the heat shrinkage furnace 2 comprises a lower box welding 201, an upper box welding 202, an inner liner galvanized plate welding 203, a vertical beam baffle 204, an electric box welding 205, a single-phase asynchronous fan 206, a narrow vertical bearing seat 207, a heating furnace driving roller assembly 208, a heating furnace driven roller assembly 209, a conveying rod, an upper box cover 211, a temperature insulation cloth 212, a temperature insulation cloth pressing plate 213, a speed regulating motor 214, a motor mounting rack 215, and a speed regulating sprocket 216.

[0040] The upper box welding 202 bottom is fixedly connected with the lower box welding 201, the upper box welding 202 two ends are connected with the vertical beam baffle 204 through bolts, the inner container galvanized plate welding 203 is arranged in the upper box welding 202, and the inner container galvanized plate welding 203 bottom is fixedly connected with the reinforcing rib in the lower box welding 201.

[0041] The upper box welding 202 upper end is connected with the upper box cover 211 through bolts, the upper box cover 211 upper end is connected with a pair of single-phase asynchronous fans 206 through bolts, the electric box welding 205 is located at the right side of the pair of single-phase asynchronous fans 206, and the electric box welding 205 bottom is connected with the upper box cover 211 through bolts.

[0042] The upper box welding 202 two sides are each provided with a temperature insulation cloth 212, and the temperature insulation cloth 212 upper end is connected with the upper box welding 202 through a temperature insulation cloth pressing plate 213 and bolts.

[0043] The heating furnace driving roller assembly 208 is located at the left side of the upper box welding 202, the heating furnace driving roller assembly 208 two ends are connected with the lower box welding 201 through narrow vertical bearing seats 207, the heating furnace driven roller assembly 209 is located at the right side of the upper box welding 202, the heating furnace driven roller assembly 209 two ends are connected with the lower box welding 201 through narrow vertical bearing seats 207, the heating furnace driving roller assembly 208 and the heating furnace driven roller assembly 209 two sides are connected through chains for transmission, a plurality of transmission rods are arranged between the chains, the plurality of transmission rods two ends are connected with the chains through bolts, and the plurality of transmission rods are evenly arranged between the chains.

[0044] The motor mounting frame 215 is connected with the lower box welding 201 through bolts, the speed regulating motor 214 is connected with the motor mounting frame 215 through bolts, the speed regulating sprocket 216 is connected with the output end of the speed regulating motor 214 through a flat key, and the speed regulating sprocket 216 is connected with the heating furnace driving roller assembly 208 through chains for transmission.

[0045] Working principle:

[0046] The servo driving assembly in the film cutting part 104, the servo driving shaft 10406 and the servo driving sprocket 10414 are arranged, the movement of the chain is controlled through the servo motor 10421, the up-down movement of the aluminum part bearing seat 10413 is driven by the chain, the servo control is performed on the upper cutter assembly 10404 and the lower cutter assembly 10405, the distance between the upper cutter assembly 10404 and the lower cutter assembly 10405 is maximized, the packaging film is cut and sealed, the cutting and sealing height is greatly increased, the height of the product that can pass through is increased, and the production demand is met.

[0047] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A back knife seal cut heat shrink packaging machine comprising a side sealer (1) and a heat shrink oven (2), the side sealer (1) comprising a main body portion (101), a front conveying line (102), a rear conveying line (103), a film cutting portion (104), a longitudinal seal assembly (105), a waste film winding assembly (106), a film guiding portion (107), characterized in that: The film cutting part (104) includes a T-shaped frame (10401), a lifting plate (10402), a vertical belt bearing (10403), an upper knife cover assembly (10404), a lower knife cover assembly (10405), a servo transmission shaft (10406), a lower knife cover bolt assembly (10407), a knife holder outer frame welding (10408), a knife holder inner frame welding (10409), a sliding bearing seat (10410), a knife cover guide frame rod (10411), a servo driving sprocket (10414), a support assembly two (10419), a motor mounting sheet metal (10420), a servo motor (10421), a motor synchronous pulley (10422), an axle seat pull plate (10423), a transmission shaft synchronous pulley (10424), a locking tooth (10425), the two ends of the knife cover guide frame rod (10411) are fixedly connected with the knife holder outer frame welding (10408), the two sides of the knife holder inner frame welding (10409) are connected with the knife cover guide frame rod (10411) through the sliding bearing seat (10410), the lower end of the knife holder inner frame welding (10409) is connected with a pair of support assemblies two (10419) through threads on the lifting plate (10402), the lower end of the T-shaped frame (10401) is fixedly connected with the bottom of the knife holder inner frame welding (10409), the T-shaped frame (10401) is connected with the upper end of the support assembly one through threads on the lifting plate (10402), the transmission shaft synchronous pulley (10424) is coupled with the servo transmission shaft (10406) through a flat key, the vertical belt bearing (10403) is rotationally connected with the servo transmission shaft (10406), the bottom of the vertical belt bearing (10403) is connected with the T-shaped frame (10401) through a bolt, the two ends of the servo transmission shaft (10406) are connected with the driving sprocket through screws, the bottom of the motor mounting sheet metal (10420) is connected with the T-shaped frame (10401) through a bolt, the servo motor (10421) is connected with the motor mounting sheet metal (10420) through screws, the motor synchronous pulley (10422) is installed on the output end of the servo motor (10421) through a flat key, the motor synchronous pulley (10422) is connected with the transmission shaft synchronous pulley (10424) through a synchronous belt for transmission, the lower knife cover assembly (10405) is located above the servo transmission shaft (10406), the upper knife cover assembly (10404) is located above the lower knife cover assembly (10405), the two ends of the lower knife cover assembly (10405) and the upper knife cover assembly (10404) are connected with the servo linkage assembly through bolts, the servo linkage assembly includes an inner guide frame rod (10412), an aluminum bearing seat (10413), a chain locking block (10415), a guide rod mounting seat (10416), a driven sprocket shaft seat (10417), a servo driven sprocket (10418), the upper and lower ends of the inner guide frame rod (10412) are connected with the guide rod mounting seat (10416) through bolts,The guide rod mounting seat (10416) is welded with the inner frame of the tool rest (10409) through bolt connection, the aluminum bearing seat (10413) is installed in the opposite direction on the guide rod, the front end of the aluminum bearing seat (10413) is connected with the chain locking block (10415) through bolt connection, the driven sprocket shaft seat (10417) is connected with the inner frame of the tool rest (10409) through bolt connection, the wheel shaft seat pull plate (10423) is located on the lower side of the driven sprocket shaft seat (10417), the upper side of the wheel shaft seat pull plate (10423) is connected with the lower end of the driven sprocket shaft seat (10417) through long screw, the wheel shaft seat pull plate (10423) is fixedly connected with the inner frame of the tool rest (10409) through bolt connection, the servo driven sprocket (10418) is connected with the inner side end of the driven sprocket shaft seat (10417) through screw and washer, the servo driven sprocket (10418) is connected with the servo driving sprocket (10414) through chain to drive, the chain passes through the chain locking block (10415) and the aluminum bearing seat (10413) and is locked through the locking teeth (10425) in the inner side of the chain locking block (10415).

2. A backrest knife block seal and cut heat shrink packaging machine according to claim 1, characterised in that: The film cutting part (104) is fixedly connected with the left end of the main body part (101), the front conveying line (102) is located on the upper side of the main body part (101), and the bottom of the front conveying line (102) is connected with the main body part (101) through a sliding seat.

3. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 1, wherein: The rear conveying line (103) is located on the left side of the front conveying line (102), the bottom of the rear conveying line (103) is connected with the main body part (101) through a sliding seat, the longitudinal sealing assembly (105) is located on the front side of the rear conveying line (103), and the lower end of the longitudinal sealing assembly (105) is fixedly connected with the front side of the rear conveying line (103) through a square tube and a profile.

4. A back gauge seal and cut heat shrink packaging machine as claimed in claim 1, wherein: The waste film winding assembly (106) is located in the main body part (101), the waste film winding assembly (106) is fixedly arranged on the inner front side of the main body part (101), the film guide part (107) is located on the rear side of the main body part (101), and the frame of the film guide part (107) is fixedly connected with the rear side of the main body part (101).

5. A back gauge seal and cut heat shrink packaging machine as claimed in claim 1, characterised in that: The heat shrinkage furnace (2) comprises a lower box welding (201), an upper box welding (202), an inner liner galvanized sheet welding (203), a vertical beam baffle (204), an electric box welding (205), a single-phase asynchronous fan (206), a narrow vertical bearing seat (207), a heating furnace driving roller assembly (208), a heating furnace driven roller assembly (209), a conveying rod, an upper box cover (211), temperature insulation cloth, temperature insulation cloth pressing plates (213), a speed regulating motor (214), a motor mounting rack (215), a speed regulating chain wheel (216).

6. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 5 wherein: The bottom of the upper box welding (202) is fixedly connected with the lower box welding (201), the two ends of the upper box welding (202) are connected with the vertical beam baffle (204) through bolts, and the inner part of the upper box welding (202) is provided with the inner liner galvanized sheet welding (203).

7. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 5, characterised in that: The upper end of the upper box welding (202) is connected with the upper box cover (211) through bolts, the upper end of the upper box cover (211) is connected with a pair of single-phase asynchronous fans (206) through bolts, the electric box welding (205) is located on the right side of the pair of single-phase asynchronous fans (206), and the bottom of the electric box welding (205) is connected with the upper box cover (211) through bolts.

8. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 5, characterised in that: The temperature insulation cloth (212) is arranged on the two sides of the upper box welding (202), and the upper end of the temperature insulation cloth (212) is connected with the upper box welding (202) through the temperature insulation cloth pressing plates (213) and bolts.

9. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 5, characterised in that: The heating furnace driving roller assembly (208) is located on the left side of the upper box welding (202), the two ends of the heating furnace driving roller assembly (208) are connected with the lower box welding (201) through the narrow vertical bearing seat (207), the heating furnace driven roller assembly (209) is located on the right side of the upper box welding (202), the two ends of the heating furnace driven roller assembly (209) are connected with the lower box welding (201) through the narrow vertical bearing seat (207), and the heating furnace driving roller assembly (208) and the heating furnace driven roller assembly (209) are connected through chains on the two sides for transmission.

10. A back knife enclosure seal and cut heat shrink packaging machine as claimed in claim 5, characterised in that: The motor mounting frame (215) is connected with the lower box welding (201) by bolts, the speed regulating motor (214) is connected with the motor mounting frame (215) by bolts, the speed regulating sprocket (216) is connected with the output end of the speed regulating motor (214) through a flat key, the speed regulating sprocket (216) is connected with the heating furnace driving roller assembly (208) through a chain for transmission, a plurality of transmission rods are arranged between the chains, the two ends of the plurality of transmission rods are connected with the chains through bolts, and the plurality of transmission rods are evenly arranged between the chains.

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