Automatic packing machine

Abstract

The invention relates to the technical field of packaging machinery, in particular to an automatic packaging machine which is characterized in that an adjusting mechanism is arranged on the outer side of a conveying table, a heat sealing mechanism is arranged on the adjusting mechanism, and a bearing mechanism located on the rear side of the conveying table is arranged on the lower side of the heat sealing mechanism; the plastic film can be stably attached to the surface of a carton during preliminary wrapping, so that the problem of film looseness caused by a reserved safety distance in a traditional mode is effectively avoided, meanwhile, in the film positioning and attaching process, a high-temperature heat source can be away from the carton and the plastic film attached to the surface of the carton in cooperation with physical isolation, and the film attaching efficiency is improved. Therefore, a high-temperature heat source accurately acts on a film lap joint area only at the sealing moment; and after heat sealing and cutting actions are completed, a heat sealing working surface and a cutting edge part can be quickly cleaned, and residual molten plastic on the surface can be removed in time, so that residue accumulation is effectively prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging machinery, in particular to an automatic packing machine. BACKGROUND

[0002] The paper box plastic sealing and packing equipment, also known as a heat shrink film packaging machine, is an automatic packaging machine that first wraps a paper box product with a plastic film and then shrinks and tightly adheres the plastic film to the surface of the paper box through heating.

[0003] In the prior art, when wrapping a paper box product with a plastic film, the plastic film is first fed by a winding conveying device and covered in front of the paper box, and then an external pushing force is used to drive the paper box to move forward, so that the paper box pushes and opens the plastic film to form a loose "packaging bag", thereby preliminarily wrapping the paper box itself. When the paper box pulls the plastic film through the sealing and cutting device, the sensing system will detect the position of the paper box, and the heat sealing device will then move downward until the overlapping part of the plastic film is pressed and fused by high temperature, thereby forming a firm sealing seam. The cutting knife moves downward synchronously to complete the heat sealing of the overlapping part of the plastic film, and at the same time, the rear plastic film connected to the plastic film wrapped on the surface of the paper box is cut off synchronously, thereby completing the wrapping of the current paper box and preparing for the wrapping of the next paper box.

[0004] However, the conventional wrapping method of a paper box product with a plastic film has the following problems: 1. In the prior art, in order to ensure that the high-temperature working surface of the heat sealing device does not damage the surface of the paper box and the plastic film already wrapped on the surface of the paper box when pressing the overlapping part of the film, the film is usually covered on the outside of the paper box in a relatively loose state during the initial wrapping stage. However, this operation method of reserving a safety distance, although effectively avoiding direct burning of the material by the heat source, also causes the film to be in a relaxed state before entering the subsequent heat shrinkage process, thereby causing the plastic film to be easily displaced, twisted or locally folded during the conveying process, which affects the uniformity of the film shrinkage during the subsequent heat plastic process and adversely affects the overall flatness of the plastic sealing appearance and the packaging quality; 2. In the prior art, since the heat sealing device and the cutting knife need to act on the overlapping area of the film synchronously, the molten plastic is easily left on the cutting knife blade and the heat sealing working surface during the high-temperature fusion process. Such residues continuously accumulate during continuous operation, which not only hinders the smooth cutting of the cutting knife and the effective pressing of the heat sealing structure, but also may cause uneven sealing lines and incomplete film cutting, thereby adversely affecting the continuity of the subsequent wrapping process and the quality of the finished product packaging. SUMMARY

[0005] In order to achieve the above object, the present application provides the following technical scheme: An automatic packing machine comprises a conveying table, an adjusting mechanism arranged outside the conveying table, a heat sealing mechanism arranged on the adjusting mechanism, and a supporting mechanism arranged at the rear side of the conveying table below the heat sealing mechanism.

[0006] The adjusting mechanism comprises a U-shaped frame arranged outside the conveying table, a guide and fitting part arranged on the U-shaped frame and used for guiding and fitting the plastic film on the upper side of the carton, and a lifting cutting part arranged on the U-shaped frame and used for cutting the plastic film.

[0007] The heat sealing mechanism comprises a positioning heat sealing part arranged on the lifting cutting part and used for heat sealing the plastic film at the rear side of the carton, a driven heat sealing part arranged on the positioning heat sealing part and used for heat sealing the plastic film at the rear end of the carton only at the moment of sealing, an active scraping part arranged on the positioning heat sealing part and used for scraping the residual plastic on the surface of the corresponding heat source, and a driven scraping part arranged on the driven heat sealing part and used for scraping the residual plastic on the surface of the corresponding heat source.

[0008] The supporting mechanism comprises an abutting supporting part arranged at the rear side of the conveying table and used for supporting and heat sealing the plastic film at the abutting part of the heat source.

[0009] Preferably, the guide and fitting part comprises a cylinder one fixedly arranged on the upper side of the U-shaped frame, an U-shaped lifting plate movably arranged at the extension end of the cylinder one, a guide rod one symmetrically arranged on the upper side of the U-shaped lifting plate and slidably connected with the horizontal section of the U-shaped frame, and a damping roller symmetrically arranged on the lower side of the U-shaped lifting plate.

[0010] Preferably, the lifting cutting part comprises a cylinder two fixedly arranged on the upper side of the U-shaped frame, a fixed plate movably arranged at the extension end of the cylinder two, a guide rod two symmetrically arranged on the upper side of the fixed plate and slidably connected with the horizontal section of the U-shaped frame, a spring rod one symmetrically arranged on the lower side of the fixed plate, a lifting table movably arranged on the spring rod one, a cutter fixedly arranged on the lower side of the spring rod one, and a wedge-shaped block fixedly arranged on the cutter and having an inclined lower side.

[0011] Preferably, the heat insulation fitting part comprises a heat insulation plate fixedly arranged at the front end of the lifting table, a rotating plate rotatably arranged on the lower end of the heat insulation plate through a rotating shaft one, and a fitting pressure roller rotatably arranged on the upper end of the rotating plate.

[0012] Preferably, the positioning heat sealing part comprises two left-right symmetrical connecting frames fixedly arranged at the lower side of the rear end of the lifting platform, a heat sealing roller one is fixedly arranged between the lower ends of the two connecting frames, a connecting table is fixedly arranged on the opposite side of each of the two connecting frames, and a gear rack is fixedly arranged at the front end of the connecting table.

[0013] Preferably, the driven heat sealing part comprises two spring rods two elastically and obliquely arranged on the connecting table through the supports and located above the connecting table, the lower end of each of the two spring rods two is fixedly provided with an L-shaped fixing frame which is in pressure cooperation with the upper end of a corresponding wedge-shaped block, and a heat sealing roller two is fixedly arranged between the lower ends of the two L-shaped fixing frames.

[0014] Preferably, the driven heat sealing part comprises two spring rods two elastically and obliquely arranged on the connecting table through the supports and located above the connecting table, the lower end of each of the two spring rods two is fixedly provided with an L-shaped fixing frame which is in pressure cooperation with the upper end of a corresponding wedge-shaped block, and a heat sealing roller two is fixedly arranged between the lower ends of the two L-shaped fixing frames.

[0015] Preferably, the driven heat sealing part comprises two spring rods two elastically and obliquely arranged on the connecting table through the supports and located above the connecting table, the lower end of each of the two spring rods two is fixedly provided with an L-shaped fixing frame which is in pressure cooperation with the upper end of a corresponding wedge-shaped block, and a heat sealing roller two is fixedly arranged between the lower ends of the two L-shaped fixing frames.

[0016] Preferably, the abutting supporting part comprises a U-shaped table arranged at the rear side of the conveying table, and a supporting table is fixedly arranged on the upper side of the U-shaped table and symmetrically arranged at the front and rear sides, and an abutting groove is arranged on the upper side of each of the two supporting tables and abuts with the heat sealing roller one and the heat sealing roller two respectively, and a spacing groove is arranged between the two supporting tables and abuts with the cutter.

[0017] Preferably, the abutting supporting part comprises a U-shaped table arranged at the rear side of the conveying table, and a supporting table is fixedly arranged on the upper side of the U-shaped table and symmetrically arranged at the front and rear sides, and an abutting groove is arranged on the upper side of each of the two supporting tables and abuts with the heat sealing roller one and the heat sealing roller two respectively, and a spacing groove is arranged between the two supporting tables and abuts with the cutter.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows: 1. The present application can realize stable adhesion of the plastic film to the surface of the carton during preliminary wrapping through the cooperation of the adjusting mechanism and the heat sealing mechanism, thereby effectively avoiding the film relaxation problem caused by the reserved safety distance in the traditional way, and in the process of positioning and adhesion of the film, the high-temperature heat source is kept away from the carton and the plastic film wrapped on the surface of the carton through physical isolation, so that the high-temperature heat source only acts on the film lap area for a moment, which not only eliminates the risk of burning of the heat source to the carton and the covered film, but also guarantees the stability and adhesion during wrapping through the positioning and adhesion of the film, thereby ensuring the safety of operation and significantly improving the flatness of the plastic sealing appearance and the overall packaging quality.

[0019] 2、The present application can realize the quick cleaning of the heat sealing working surface and the cutting blade after the heat sealing and cutting action is completed, and timely remove the residual molten plastic on the surface, so as to effectively prevent the accumulation of residual material, ensure that the heat sealing structure always maintains a clean working surface and stable heat conduction performance, while maintaining the sharpness of the cutting knife and the smoothness of the cutting, thereby ensuring the flatness of the sealing line and the completeness of the film cutting, significantly improving the stability of the continuous operation of the equipment and the consistency of the finished packaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present application.

[0021] Figure 2 It is a partial structure side view schematic diagram of the present application.

[0022] Figure 3 It is a partial structure side view schematic diagram of the present application. Figure 2 It is an enlarged schematic diagram of A in the middle.

[0023] Figure 4 It is a partial structure schematic diagram of the adjusting mechanism.

[0024] Figure 5 It is a partial structure front view schematic diagram of the lifting cutting part.

[0025] Figure 6 It is a partial structure schematic diagram of the heat insulation and adhesion part.

[0026] Figure 7 It is a partial structure schematic diagram of the present application. Figure 6 It is an enlarged schematic diagram of B in the middle.

[0027] Figure 8 It is a partial structure schematic diagram of the heat sealing mechanism.

[0028] Figure 9 It is a partial structure schematic diagram of the driven heat sealing part.

[0029] Figure 10 It is a partial structure schematic diagram of the driven heat sealing part.

[0030] Figure 11 It is a partial structure schematic diagram of the supporting mechanism.

[0031] Figure 12 It is a partial structure schematic diagram of the cutting and cleaning part.

[0032] In the figure: 1, conveying table; 2, adjusting mechanism; 21, U-shaped frame; 22, guiding and fitting part; 221, air cylinder one; 222, U-shaped lifting plate; 223, damping roller; 23, lifting and cutting part; 231, air cylinder two; 232, fixed plate; 233, spring rod one; 234, lifting table; 235, cutter; 236, wedge block; 24, heat insulation fitting part; 241, heat insulation plate; 242, rotating plate; 243, fitting pressure roller; 3, heat sealing mechanism; 31, positioning heat sealing part; 311, connecting frame; 312, heat sealing roller one; 313, connecting table; 314, rack; 32, driven heat sealing part; 321, spring rod two; 322, L-shaped fixed frame; 323, heat sealing roller two; 33, driving scraping part; 331, rotating air cylinder; 332, U-shaped rotating frame one; 333, scraper one; 34, driven scraping part; 341, U-shaped rotating frame two; 342, scraper two; 343, toothed ring; 4, supporting mechanism; 41, butt joint supporting part; 411, U-shaped table; 412, supporting table; 413, butt joint groove; 414, spacing groove; 42, cutting and cleaning part; 421, rotating seat; 422, scraper three. 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Please refer to Figure 1 An automatic packing machine comprises a conveying table 1, an adjusting mechanism 2 arranged outside the conveying table 1, a heat sealing mechanism 3 arranged on the adjusting mechanism 2, and a supporting mechanism 4 arranged at the rear side of the conveying table 1 below the heat sealing mechanism 3.

[0035] Please refer to Figure 1 The adjusting mechanism 2 comprises a U-shaped frame 21 arranged outside the conveying table 1, a guiding and fitting part 22 arranged on the U-shaped frame 21 to guide and fit the plastic film on the upper side of the carton, and a lifting and cutting part 23 arranged on the U-shaped frame 21 to cut the plastic film, wherein a heat insulation fitting part 24 is arranged on the lifting and cutting part 23 to isolate the heat source and guide and fit the plastic film on the rear side of the carton.

[0036] Please refer to Figure 1 , Figure 2 and Figure 4The guide fitting part 22 includes a cylinder one 221 fixedly arranged on the upper side of the U-shaped frame 21, and a U-shaped lifting plate 222 movably arranged on the telescopic end of the cylinder one 221. The upper side of the U-shaped lifting plate 222 is symmetrically fixed with guide rods one slidably connected with the horizontal section of the U-shaped frame 21. The lower side of the U-shaped lifting plate 222 is symmetrically rotatably arranged with damping rollers 223.

[0037] The existing winding conveying equipment is used to feed the plastic film. The expanded plastic film is vertically arranged behind the lifting cutting part 23. When the carton is driven by the external pushing force (not shown in the figure) to push the plastic film in front of the conveying table 1 and expand it to form a loose "packaging bag", the U-shaped lifting plate 222 is driven downward by the cylinder one 221. The U-shaped lifting plate 222 drives the damping rollers 223 to move downward synchronously. When the damping rollers 223 stably press the plastic film above the front end of the carton to the upper surface of the front end of the carton, the plastic film is stably adhered to the upper surface of the carton under the guidance of the damping rollers 223.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 , the lifting cutting part 23 includes a cylinder two 231 fixedly arranged on the upper side of the U-shaped frame 21, and a fixed plate 232 movably arranged on the telescopic end of the cylinder two 231. The upper side of the fixed plate 232 is symmetrically fixed with guide rods two slidably connected with the horizontal section of the U-shaped frame 21. The lower side of the fixed plate 232 is symmetrically fixed with spring rods one 233. The lifting table 234 movably arranged on the spring rods one 233 is elastically slidably arranged on the upper side of the two spring rods one 233. The lower side of the two spring rods one 233 is fixedly arranged with a cutter 235 through a connecting plate. The cutter 235 is symmetrically fixed with wedge blocks 236 with inclined lower sides.

[0039] The fixed plate 232 is driven to move up and down by the cylinder two 231. The spring rods one 233 are synchronously moved with the fixed plate 232. The lifting table 234 and the cutter 235 on the lower side of the connecting plate are synchronously moved with the spring rods one 233. The wedge blocks 236 on both sides are synchronously moved with the cutter 235.

[0040] Please refer to Figure 1 、 Figure 3 、 Figure 6 and Figure 7The heat-sealing mechanism 3 includes a positioning heat-sealing part 31 arranged on the lifting cutting part 23 and used for heat-sealing the plastic film on the back side of the carton, a driven heat-sealing part 32 arranged on the positioning heat-sealing part 31 and used for heat-sealing the plastic film on the back end of the carton only at the moment of sealing, a driving scraping part 33 arranged on the positioning heat-sealing part 31 and used for scraping the residual plastic on the surface of the corresponding heat source, and a driven scraping part 34 arranged on the driven heat-sealing part 32 and used for scraping the residual plastic on the surface of the corresponding heat source.

[0041] When the carton passes under the cutter 235 under the action of the external pushing force and is completely conveyed onto the conveying table 1, the conveying of the carton is first stopped, the carton is temporarily positioned by the damping roller 223, and the plastic film is stably pressed and adhered to the upper surface of the carton. Then, the spring rod one 233 and the lifting table 234 are driven by the cylinder two 231 to move downward synchronously, the lifting table 234 drives the heat insulation plate 241 to move downward synchronously, the heat insulation plate 241 drives the rotating plate 242 and the adhering compression roller 243 to move downward through the rotating shaft one, the adhering compression roller 243 contacts and adheres to the upper side of the back end of the carton and the plastic film on the surface of the carton, the back end of the carton drives the rotating plate 242 to rotate upward around the rotating shaft one and compresses the torsional spring one by pressing the adhering compression roller 243, the torsional spring one drives the rotating plate 242 and the adhering compression roller 243 to stably press and adhere the plastic film to the back surface of the carton through the elastic action of the torsional spring one, and the plastic film is stably adhered and wrapped on the outer surface of the carton under the cooperation of the adhering compression roller 243 and the damping roller 223 as the adhering compression roller 243 continuously moves downward.

[0042] Please refer to Figure 1 and Figure 8 , the heat-sealing mechanism 3 includes a positioning heat-sealing part 31 arranged on the lifting cutting part 23 and used for heat-sealing the plastic film on the back side of the carton, a driven heat-sealing part 32 arranged on the positioning heat-sealing part 31 and used for heat-sealing the plastic film on the back end of the carton only at the moment of sealing, a driving scraping part 33 arranged on the positioning heat-sealing part 31 and used for scraping the residual plastic on the surface of the corresponding heat source, and a driven scraping part 34 arranged on the driven heat-sealing part 32 and used for scraping the residual plastic on the surface of the corresponding heat source.

[0043] Please refer to Figure 8 and Figure 9 , the heat-sealing mechanism 3 includes a positioning heat-sealing part 31 arranged on the lifting cutting part 23 and used for heat-sealing the plastic film on the back side of the carton, a driven heat-sealing part 32 arranged on the positioning heat-sealing part 31 and used for heat-sealing the plastic film on the back end of the carton only at the moment of sealing, a driving scraping part 33 arranged on the positioning heat-sealing part 31 and used for scraping the residual plastic on the surface of the corresponding heat source, and a driven scraping part 34 arranged on the driven heat-sealing part 32 and used for scraping the residual plastic on the surface of the corresponding heat source.

[0044] When the plastic film is pressed and attached by the attachment pressing roller 243 moving downward with the lifting platform 234, the connecting frame 311 drives the heat sealing roller one 312 to move downward synchronously until the heat sealing roller one 312 cannot continue to move downward by contacting and attaching the supporting mechanism 4, at this time, the heat sealing roller one 312 can heat seal the overlapping part of the plastic film at the rear side of the cutter 235.

[0045] Please refer to Figure 8 、 Figure 9 and Figure 10 , the driven heat sealing part 32 includes two spring rods two 321 which are arranged obliquely and elastically on the connecting platform 313 above the connecting frame 311 through the supports, the lower end of the spring rod two 321 is fixedly provided with an L-shaped fixed frame 322 which is in pressure cooperation with the upper end of the corresponding wedge block 236, and the lower ends of the two L-shaped fixed frames 322 are fixedly provided with a heat sealing roller two 323.

[0046] When the heat sealing roller one 312 cannot move downward by contacting the supporting mechanism 4, the lifting platform 234 stops moving synchronously with the heat sealing roller one 312, the fixed plate 232 and the spring rod one 233 continue to move downward by the cylinder two 231, the spring rod one 233 moves relatively with the lifting platform 234 and drives the cutter 235 to move downward synchronously, the cutter 235 drives the wedge block 236 to move downward synchronously, until the lower side of the wedge block 236 is in contact with the upper end of the L-shaped fixed frame 322, the L-shaped fixed frame 322 drives the spring rod two 321 to move obliquely downward synchronously under the pressure of the wedge block 236, the heat sealing roller two 323 moves obliquely synchronously, until the cutter 235 moves to the lowest position and cuts off the plastic film overlapping together between the heat sealing roller one 312 and the heat sealing roller two 323, at this time, the heat sealing roller two 323 extends from below the heat insulation plate 241 and cooperates with the supporting mechanism 4 to heat seal the plastic film overlapping together at the lower side of the rear end of the carton, thereby completing the overall wrapping of the plastic film on the surface of the carton, wherein the heat insulation plate 241 can greatly reduce the influence of the heat emitted by the heat sealing roller two 323 on the carton and the plastic film attached to the rear surface of the carton, and the heat sealing roller two 323 is far away from the heat insulation plate 241 and the carton when not performing heat sealing processing, thereby further reducing the risk of burning the carton and the plastic film.

[0047] The above operation mode can realize stable adhesion of the plastic film to the surface of the carton during preliminary wrapping, thereby effectively avoiding the film relaxation problem caused by the reserved safety distance in the traditional way. Meanwhile, in the process of positioning and adhesion of the film, the physical isolation can be matched to make the second heat sealing roller 323 away from the carton and the plastic film adhesively wrapped on the surface of the carton, so that the second heat sealing roller 323 only accurately acts on the film lap area at the sealing moment, which not only eliminates the risk of burning the carton and the covered film by the second heat sealing roller 323, but also guarantees the stability and adhesion degree in the wrapping process through the positioning and adhesion of the film, thereby significantly improving the flatness of the plastic sealing appearance and the overall packaging quality while ensuring the operation safety.

[0048] When the wrapping of the plastic film on the surface of the carton is completed, the carton is continuously conveyed forward to the heat sealing equipment (not shown in the figure) by the conveying table 1 for heating and shrinking, so as to plastic seal the wrapped plastic film on the outer surface of the carton. At this time, the plastic film behind the first heat sealing roller 312 can be covered in front of the new carton to be wrapped again by the external winding conveying equipment (not shown in the figure).

[0049] Please refer to Figure 3 and Figure 8 , the active scraping part 33 includes two rotary cylinders 331 fixedly arranged on the opposite sides of the two connecting frames 311 and located below the connecting table 313, and the driving ends of the two rotary cylinders 331 are fixedly arranged with a U-shaped rotating frame one 332 rotating around the first heat sealing roller 312. The side of the U-shaped rotating frame one 332 close to the first heat sealing roller 312 is fixedly arranged with a scraper one 333.

[0050] When the residual plastic on the surface of the first heat sealing roller 312 is to be scraped, the U-shaped rotating frame one 332 is driven by the rotary cylinder 331 to rotate one hundred and eighty degrees around the first heat sealing roller 312, and the scraper one 333 is synchronously rotated around the first heat sealing roller 312 and scrapes the residual plastic on the surface thereof.

[0051] Please refer to Figure 3 , Figure 9 and Figure 10 , the driven scraping part 34 includes a U-shaped rotating frame two 341 rotatably arranged at the lower ends of the two L-shaped fixed frames 322 through the two rotating shafts two and rotating around the second heat sealing roller 323. The side of the U-shaped rotating frame two 341 close to the second heat sealing roller 323 is fixedly arranged with a scraper two 342, and the left and right sides of the U-shaped rotating frame two 341 are symmetrically fixedly arranged with tooth rings 343 rotatably connected with the corresponding rotating shafts two and meshingly connected with the corresponding racks 314.

[0052] When the L-shaped fixed frame 322 drives the heat-sealing roller two 323 to move obliquely downward under the pressure of the wedge block 236, the second shaft drives the U-shaped rotating frame two 341 and the gear ring 343 to move synchronously, the gear ring 343 drives the U-shaped rotating frame two 341 to rotate one hundred and eighty degrees around the heat-sealing roller two 323 by meshing with the corresponding gear rod 314, and the scraper two 342 rotates synchronously to the rear side of the heat-sealing roller two 323 and scrapes the residual plastic on the surface of the heat-sealing roller two 323; when the cutter 235 and the wedge block 236 are driven by the second air cylinder 231 to move upward and reset, the second spring rod 321 drives the L-shaped fixed frame 322 and the heat-sealing roller two 323 to move reversely and reset, the gear ring 343 moves synchronously and meshes with the gear rod 314 again, the U-shaped rotating frame two 341 reversely rotates one hundred and eighty degrees and drives the scraper two 342 to scrape the residual plastic on the surface of the heat-sealing roller two 323 again.

[0053] Please refer to Figure 1 and Figure 11 , the supporting mechanism 4 includes an abutting supporting part 41 arranged at the rear side of the conveying table 1 for supporting and heat-sealing the overlapped part of the plastic film with the heat source, and a cutting cleaning part 42 arranged on the abutting supporting part 41 for cleaning the lifting cutting part 23.

[0054] Please refer to Figure 1 , Figure 3 , Figure 11 and Figure 12 , the abutting supporting part 41 includes a U-shaped table 411 arranged at the rear side of the conveying table 1, and two supporting tables 412 symmetrically fixed on the upper side of the U-shaped table 411, and the upper side of each of the two supporting tables 412 is provided with an abutting groove 413 for abutting with the heat-sealing roller one 312 and the heat-sealing roller two 323 respectively, and the two supporting tables 412 are jointly provided with a spacing groove 414 for aligning and inserting the cutter 235.

[0055] When the heat-sealing roller one 312 and the heat-sealing roller two 323 abut and contact with the corresponding abutting grooves 413 on the supporting tables 412 respectively, the heat-sealing roller one 312 and the heat-sealing roller two 323 cannot continue to move downward, and cooperate with the corresponding abutting grooves 413 to heat-seal the plastic film overlapped at the corresponding position, wherein the abutting grooves 413 can avoid the left and right deviation of the plastic film inside to a certain extent, so as to ensure the stability of the abutment of the heat-sealing roller one 312 and the heat-sealing roller two 323 with the plastic film, and the front abutting groove 413 can further isolate the heat-sealing roller two 323 from the carton and the plastic film on the surface of the carton, thereby further avoiding the risk of burning the carton and the plastic film on the surface of the carton.

[0056] Please refer to Figure 3 , Figure 11 and Figure 12The cutting and cleaning part 42 comprises two symmetrical rotary seats 421 fixedly arranged on the supporting table 412 below the spacing groove 414, and a scraper 422 is rotatably arranged between the two rotary seats 421 through a rotary shaft 423, and the upper end of the scraper 422 is elastically rotatably connected with the corresponding rotary seat 421 through a torsional spring 422.

[0057] When the lower end of the cutter 235 is in contact with and cuts the plastic film at the corresponding position on the lower side, the lower end of the cutter 235 is inserted into the spacing groove 414 and simultaneously presses the scraper 422 away from the corresponding rotary seat 421, and as the cutter 235 continuously moves downward, the scraper 422 is deflected downward around the rotary seat 421, and the lower end of the cutter 235 is inserted into the lower side of the scraper 422 until it moves to the lowest position, and the scraper 422 is always in close contact with the side wall of the cutter 235 under the elastic action of the corresponding torsional spring 422, and when the cutter 235 moves upward to reset, the blade of the cutter 235 is again in contact with the blade of the scraper 422, and the scraper 422 scrapes the plastic remaining on the surface of the cutter 235, and when the cutter 235 moves upward out of the spacing groove 414, the scraper 422 is deflected upward to reset to the initial position under the elastic action of the corresponding torsional spring 422, and the blade of the scraper 422 and the blade of the cutter 235 can be polished together, thereby significantly increasing the service life of the cutter 235 and the cutting quality.

[0058] The above operation mode can realize the rapid cleaning of the surfaces of the heat-sealing roller one 312, the heat-sealing roller two 323 and the blade of the cutter 235 after the heat-sealing and cutting actions are completed, and the residual molten plastic on the surfaces is timely removed, thereby effectively preventing the accumulation of residual materials, ensuring that the heat-sealing roller one 312 and the heat-sealing roller two 323 always have clean working surfaces and stable heat conduction performance, maintaining the sharpness of the cutter 235 and the smoothness of the cutting, and further ensuring the flatness of the sealing line and the completeness of the film cutting, thereby significantly improving the stability of the continuous operation of the equipment and the consistency of the quality of the finished product packaging.

[0059] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 limiting the present application.

[0060] In addition, the terms "first", "second", "one", "two" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0061] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not limited to the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic packing machine comprising a conveyor table, characterized in that: The adjusting mechanism is provided with a heat sealing mechanism, and the lower side of the heat sealing mechanism is provided with a supporting mechanism located at the rear side of the conveying table; The adjusting mechanism comprises a U-shaped frame provided at the outer side of the conveying table, and a guide and fitting part for guiding and fitting the plastic film on the upper side of the carton and a lifting cutting part for cutting the plastic film are provided on the U-shaped frame in front and back directions. The heat sealing mechanism comprises a positioning heat sealing part provided on the lifting cutting part and used for heat sealing the plastic film on the rear side of the carton, a driven heat sealing part which is physically separated from the plastic film on the surface of the carton and is used for heat sealing the plastic film on the rear end of the carton only at the moment of sealing, and a driven scraping part provided on the driven heat sealing part and used for scraping the residual plastic on the surface of the corresponding heat source. The supporting mechanism comprises an abutting supporting part provided at the rear side of the conveying table and used for supporting and heat sealing the overlapping part of the plastic film by the heat source.

2. An automatic packing machine according to claim 1, characterized in that: The guide and fitting part comprises a cylinder one fixedly provided at the upper side of the U-shaped frame, and a U-shaped lifting plate moving up and down is fixedly provided at the extension end of the cylinder one.

3. An automatic packing machine according to claim 1, characterized in that: The lifting cutting part comprises a cylinder two fixedly provided at the upper side of the U-shaped frame, and a fixed plate moving up and down is fixedly provided at the extension end of the cylinder two.

4. An automatic packing machine according to claim 3, characterized in that: The heat insulation fitting part comprises a heat insulation plate fixedly provided at the front end of the lifting platform, and rotating plates are symmetrically and rotatably provided at the lower end of the heat insulation plate through rotating shafts one.

5. An automatic packing machine according to claim 3, characterized in that: The positioning heat sealing part comprises connecting frames fixedly provided at the lower side of the rear end of the lifting platform, and a heat sealing roller one is fixedly provided between the lower ends of the two connecting frames.

6. An automatic packer according to claim 5, characterised in that: The driven heat sealing part comprises spring rods two which are symmetrically and elastically slidably provided on the opposite sides of the connecting frames above the connecting platforms, and the lower ends of the spring rods two are fixedly provided with L-shaped fixed frames which are in inclined pressure cooperation with the inclined surfaces of the corresponding wedge-shaped blocks. The driven heat sealing part comprises spring rods two which are symmetrically and elastically slidably provided on the opposite sides of the connecting frames above the connecting platforms, and the lower ends of the spring rods two are fixedly provided with L-shaped fixed frames which are in inclined pressure cooperation with the inclined surfaces of the corresponding wedge-shaped blocks.

7. An automatic packing machine according to claim 5, characterized in that: The active scraping part comprises two rotary air cylinders fixed at opposite sides of the connecting frame and located below the connecting table, and the driving ends of the two rotary air cylinders are fixedly provided with a U-shaped rotating frame one rotating around the heat sealing roller one, and the side of the U-shaped rotating frame one close to the heat sealing roller one is fixedly provided with a scraper one.

8. An automatic packer according to claim 6, characterized in that: The driven scraping part comprises two U-shaped rotating frames two fixedly provided at the lower ends of the two L-shaped fixed frames and rotating around the heat sealing roller two through the second rotating shaft, and the side of the U-shaped rotating frame two close to the heat sealing roller two is fixedly provided with a scraper two, and the left and right sides of the U-shaped rotating frame two are symmetrically fixedly provided with tooth rings rotationally connected with the corresponding second rotating shaft and meshingly connected with the corresponding racks.

9. An automatic packer according to claim 6, characterized in that: The docking supporting part comprises a U-shaped table provided at the rear side of the conveying table, and the upper side of the U-shaped table is symmetrically fixedly provided with supporting tables, and the upper sides of the two supporting tables are provided with docking grooves respectively docking with the heat sealing roller one and the heat sealing roller two, and the two supporting tables are jointly provided with a spacing groove in which the cutter is inserted.

10. An automatic packer according to claim 9, characterised in that: The cutting and cleaning part comprises rotating seats fixedly provided on the supporting tables and located below the spacing groove, and the two rotating seats are rotatably provided with a scraper three through the third rotating shaft, and the upper end of the scraper three is elastically rotationally connected with the corresponding rotating seat through the second torsional spring.

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