559results about "Wrappers shrinkage" patented technology

The utility model discloses a product package conveying device which comprises a base, a feeding belt arranged at an opening in the top of the outer wall of the base, and a film covering feeding assembly arranged on one side of the outer wall of the base and used for covering the outer wall of the base. Wherein the film covering and feeding assembly comprises a feeding shell, a cutting frame, a feeding wheel, a guide wheel set, a rubber wheel, a lifting air cylinder, a lifting frame, a cutting motor, a transmission wheel set and a rotary cutter, and the feeding shell is fixedly arranged on one side of the outer wall of the base. When ports of goods are contracted and supported, dislocation is avoided in the process of moving and hot pressing of long edges of the bottom of a covering film, attractiveness and accuracy of sealing point positions are guaranteed, dislocation of the covering film is avoided before folding and in the moving process of the goods, meanwhile, stable and gradual port seam hot pressing sealing is achieved, and the sealing efficiency is improved. The problems of seam dislocation and non-uniform sealing point positions are avoided, the stability of the hot-pressed seam of the laminating film is guaranteed to the maximum extent, and the structural strength of the laminating film is guaranteed.

The invention relates to the technical field of rubber mat production and packaging, in particular to an automatic rubber mat production and packaging method and system.The method comprises the steps that order information is pre-collected, an order information base is established, orders are classified according to different types, and specific equipment operation parameters are pre-written according to the orders of different types; receiving a new order through the network platform, and comparing the new order with the classification in the order information base; the type of the new order is confirmed, corresponding equipment operation parameters are started according to the type, and the new order is packaged; therefore, the equipment parameters required by each rubber mat order are written in advance, after a user places an order, the equipment can be quickly adjusted, the required order packaging parameters are selected, meanwhile, the AGV automatically goes to a warehouse to pick up goods, then intermediate goods pick-up and debugging stages are not needed, the whole process of rubber mat production and packaging from order placing to packaging can be directly completed, and the production efficiency is improved. And the production and packaging efficiency is obviously improved.

The present invention provides an alternating cold-stretching packaging device, comprising: a bracket having a plurality of support columns; a film pulling device connected to the bracket, which has two independently and oppositely arranged film pulling mechanisms for cold-stretching a packaging film. The film pulling mechanisms are connected to the support columns, and the two film pulling mechanisms can perform alternating reciprocating motions on the support columns to alternately pull and package an article passing through the packaging position by the two film pulling mechanisms. The present invention reduces the packaging cost by about 30%, facilitates the inspection of goods, and is more environmentally friendly. At the same time, the alternating cold-stretching packaging method greatly improves the packaging efficiency, can greatly save the cost of purchasing the machine, and solves the problem of insufficient installation space of the equipment in the prior art.

The purpose of the present invention is to provide a heat-shrinkable film that has a reduced natural shrinkage rate and improved shrink finish. This heat-shrinkable film is composed of polyester and / or polystyrene and satisfies the following (1) to (4): (1) the shrinkage rate in the main shrinkage direction when treated in hot water at 70°C for 10 seconds is 3% or less; (2) the shrinkage rate in the main shrinkage direction when treated in hot water at 80°C for 10 seconds is more than 10% and not more than 50%; (3) the shrinkage rate in the main shrinkage direction when treated in silicon oil at 120°C for 10 seconds is 50-80%; and (4) the natural shrinkage rate (dimensional change rate) in the main shrinkage direction of the film after aging for 168 hours in an atmosphere of 50°C and 40% relative humidity is 1% or less.

The utility model discloses an automatic adhesive tape packing machine which comprises a conveying line, a bearing seat, a heating plate and an installation assembly, the bearing seat is used for bearing adhesive tape products, the heating plate is used for heating a heat shrinkage film outside the adhesive tape products, and the installation assembly is arranged between the heating plate and the conveying line. The mounting assembly comprises a fixing frame, a connecting assembly and a locking assembly, the fixing frame is fixedly connected to the side of the conveying line, the heating plate is slidably connected to one side of the fixing frame through the connecting assembly, the locking assembly is arranged on the fixing frame, and the locking assembly locks the heating plate by locking the connecting assembly. The conveying line, the bearing seat, the heating plate and the mounting assembly are used in a matched mode, so that the braking state of the locking assembly on the connecting sleeve is relieved, the connecting sleeve slides relative to the fixed sleeve, and the distance between the heating plate and the bearing seat is changed; and the heating plate is positioned at a proper position to heat and shrink the packaging film outside the adhesive tape product.

The present invention provides a packaging material comprising paper having a wet shrinkage in the CD direction of at least 3% and a method of wrapping articles with said packaging material, wetting the packaging material, wrapping said articles with said wetted packaging material, and drying the packaging material such that it shrinks to tightly bind the wrapped articles.

The invention relates to the technical field of sealant packaging equipment, in particular to an automatic sealant production line which comprises a bag sealing mechanism. The bag sealing mechanism comprises a frame body, an unwinding assembly is arranged at the top of the frame body and comprises a shear fork arm assembly and a driving motor, carrier rollers are symmetrically installed at the two ends of the top of the shear fork arm assembly, and an auxiliary synchronous belt wheel is fixed to one end of one carrier roller; a third rotating shaft is arranged at the intersection point position of the shear fork arm assembly, one end of the third rotating shaft is fixedly connected with the output end of the driving motor through a coupler, and a main synchronous belt wheel in driving connection with the auxiliary synchronous belt wheel is fixed to the other end of the third rotating shaft; a first rotating shaft in sliding fit with the upper side plates on the two sides is arranged at one end of the bottom of the shear-fork arm assembly, and a second rotating shaft is arranged at the other end of the bottom of the shear-fork arm assembly and rotationally connected with the upper side plates on the two sides. The distance between the carrier rollers changes synchronously in real time along with the dead weight of the film roll and is matched with the dead weight of the film roll all the time, and dynamic and accurate adaptation in the full-unwinding process is achieved.

The present invention relates to the technical field of cloth roll packaging. The present invention provides a textile cloth roll packaging device, including an end sealing device, which includes a sliding bin, the sliding bin is slidably arranged on a workbench and can be close to or away from the end of the cloth roll, and the sliding bin has an exhaust port connected to the exhaust device; a clamping mechanism is rotatably arranged in the sliding bin; and a heat-sealing cutting mechanism is arranged in the sliding bin and is located on the side of the clamping mechanism close to the cloth roll. In the above technical solution, the sliding bin of the end sealing device can be close to or away from the end of the cloth roll, and the film waste edges can be adsorbed through the exhaust port, which can not only preliminarily gather the film waste edges, but also make the film more flatly fixed on the cloth roll. The clamping mechanism twists the film waste edges into a spiral multi-layer structure, which can achieve fusion of the multi-layer film during heat sealing, effectively increase the sealing interface, and disperse the stress generated by the circumferential shrinkage of the film during heat shrinkage, thereby avoiding the problems of cracks, delamination or false sealing at the seal caused by the limited sealing interface and stress concentration of the existing plane heat seal.

The utility model discloses a heat shrink packaging machine for a high-grade cigarette packaging box, which relates to the technical field of packaging machines, and comprises a rack, support plates are symmetrically arranged at the front end of the outer top surface of the rack, rotating shaft rollers I are symmetrically and rotationally arranged between the two support plates, and the exteriors of the two rotating shaft rollers I are rotationally connected with a conveying belt; the rear end of the outer top surface of the rack is fixedly provided with a heat shrinking machine through bolts, the outer walls of the front side and the rear side of the heat shrinking machine are provided with a feed port and a discharge port in a penetrating mode respectively, a plurality of second rotating shaft rollers are rotationally installed in the heat shrinking machine, and the front ends of the outer top surfaces of two supporting plates are provided with guide assemblies; a hot cutting assembly is arranged at the rear ends of the outer top faces of the two supporting plates. Cigarette packaging boxes to be thermally shrunk can be stably conveyed through the arranged conveying belt, the cigarette packaging boxes of different sizes can be limited and guided under the assistance of the guiding assembly, then the positions of the cigarette packaging boxes are corrected, and therefore practicability is improved.

The utility model discloses a disposable cup conveying mechanism of a heat shrinking machine, which comprises a conveying part and a shaping part, the conveying part comprises a left transmission chain, a right transmission chain and a plurality of cup supporting pieces, the cup supporting pieces are transversely arranged, and the two ends of each cup supporting piece are respectively connected with the left transmission chain and the right transmission chain; the shaping component comprises a plurality of shaping sets, one cup supporting piece is provided with one shaping set, each shaping set comprises a cup blocking piece and a cup jacking piece which are installed on the cup supporting piece, and the cup jacking piece transversely moves relative to the cup blocking piece and extends into a cup. A cup is placed on a cup supporting piece of the conveying component and is conveyed in the discharging direction under the driving of a left transmission chain and a right transmission chain, a cup jacking piece moves towards the cup in the conveying process, a cup blocking piece blocks the cup, the cup jacking piece stretches into the cup, a film at a cup opening enters the cup and is attached to the inner wall of the cup body, in this way, the film enters a thermal shrinkage furnace, and the cup body is wrapped by the film in a shrinkage mode. In addition, the containing cavity with the cup opening is reserved, the disposable cups can be stacked together in a sleeved mode when collected, and stacking of the cups is facilitated.

The utility model discloses an edge sealing machine with a positioning function, and relates to the technical field of mechanical engineering, the edge sealing machine comprises an edge sealing conveying table, the front end of the edge sealing conveying table is fixedly connected with a film sealing triangular plate, the edge sealing machine with the positioning function is provided with a first sliding table, a second sliding table and a cross rod, and when the edge sealing machine with the positioning function is used, a packing material is placed on the edge sealing conveying table; then the air cylinder is started, the first sliding table is pulled downwards, in the process of pulling the first sliding table, the second connecting rod enables the transverse rod to rotate downwards along the circular shaft, meanwhile, the transverse rod pulls the first connecting rod upwards, and due to the fact that the first connecting rod is connected with the second sliding table, the first connecting rod pulls the second sliding table to move upwards at the same time; the corners of the packing material touch the limiting support legs, so that the limiting support legs rotate along the rotating shafts, and as the limiting support legs are 90-degree right angles, the packing material is centered after the four corners of the packing material are clamped by the limiting support legs, so that the problem of inaccurate positioning of the device is solved.

The utility model relates to the technical field of battery processing, in particular to an automatic card inserting mechanism for battery processing, which comprises a rack, a thermal shrinkage furnace is arranged on the rack, a belt conveyor is arranged on one side of the thermal shrinkage furnace, a linear servo mechanism is arranged on one side of the belt conveyor, and the linear servo mechanism comprises a linear guide rail, a sliding block, an electric telescopic rod and a sucker. A pneumatic pushing mechanism is arranged on one side of the linear servo mechanism, a storage box is arranged on one side of the pneumatic pushing mechanism, an auxiliary mechanism is arranged on the storage box, a plurality of batteries are arranged on the belt conveyor, and a plurality of PVC films are arranged in the storage box. The automatic paper card inserting device is novel in structure, automatic and rapid paper card inserting and thermal shrinkage are achieved, the overall working efficiency is improved, cost is reduced, manual operation is reduced, and the product quality is improved.

The utility model relates to the technical field of electrical component plastic packaging, and discloses an electrical component plastic packaging device which comprises a thermal shrinkage packaging machine body and further comprises two first blocking assemblies, two second blocking assemblies and two third blocking assemblies, the two first blocking assemblies are arranged at the two ends of the thermal shrinkage packaging machine body respectively, and the two second blocking assemblies are arranged at the two ends of the thermal shrinkage packaging machine body respectively. The two second blocking assemblies are installed in the two first blocking assemblies in a sliding mode correspondingly. When the heating bin of the heat shrink packaging machine body is preheated, the inlet and outlet of the heating bin can be more effectively blocked through the two sliding blocking plates and the lifting blocking plate, heat loss during preheating is reduced, the motor can be started during plastic sealing of an electrical element, and the electrical element can be conveniently sealed. The two sliding barrier plates and the lifting barrier plate are driven to be opened at the same time until electrical components can pass through, plastic packaging can be carried out, the two sliding barrier plates and the lifting barrier plate can continuously provide effective blocking for an unopened area, and heat loss during plastic packaging is reduced.

The utility model is suitable for the field of material packaging, and provides a belt conveying mechanism and automatic book plastic packaging machine equipment, the belt conveying mechanism comprises a main body frame, the main body frame is further provided with a front conveying belt device and a feeding conveying device, and the front conveying belt device is located at the output end of the feeding conveying device; according to the book plastic packaging machine, adjustment can be conducted according to the width and length of books, manual pushing is not needed, manual contact is avoided, manual operation safety is protected, the automation degree is high, time and labor are saved, cost is reduced, the plastic packaging efficiency is higher, and the plastic packaging effect is better.

The invention discloses a servo cuff type packaging machine, and belongs to the technical field of servo cuff type packaging, the servo cuff type packaging machine comprises a sealing and cutting machine, a conveying table is mounted on one side of the sealing and cutting machine, a thermoplastic bin is fixed at the top of the conveying table, fans are symmetrically mounted in the thermoplastic bin, flow guide assemblies are arranged on the fans, and flow distribution boxes are fixed at the output ends of the fans; corrugated pipes are evenly arranged at the bottom of the flow dividing box, a mounting frame is mounted at the ends of the corrugated pipes, a limiting assembly is arranged between the mounting frame and the thermoplastic bin, and a screw is rotationally mounted in the middle of the mounting frame and penetrates to the outer side of the thermoplastic bin. The distance between the mounting frame and a thermoplastic object is adjusted according to needs, the thermoplastic requirements of objects of different specifications can be met, the equipment universality is improved, the corrugated pipe can flexibly adjust the hot air flow conveying path, the hot air flow is evenly distributed to all outlets through the flow dividing box, the surface of the object is more comprehensively covered with heat, and the problem of local overheating or insufficient heating is solved; and the thermoplastic quality and efficiency are optimized.

The application discloses a kind of battery heat shrink film packaging equipment, including transmission mechanism, battery operation device, ultrasonic welding mechanism and heat shrink film feeding device, transmission mechanism is equipped with transmission channel, battery operation device and ultrasonic welding mechanism are all through transmission channel and transmission mechanism docking, in the transmission mechanism transport direction, battery operation device is prior to ultrasonic welding mechanism setting, heat shrink film feeding device is located at the rear of battery operation device and transmission mechanism docking starting place, heat shrink film feeding device is through transmission channel and transmission mechanism docking, battery is docked to the transmission channel of transmission mechanism by battery operation device, battery is wrapped at heat shrink film feeding device and transmission channel, again by transmission mechanism transport to ultrasonic welding mechanism place, the packaging equipment can use continuous heat shrink film to wrap, seal, improve the packaging speed of scattered battery to scattered battery, and save production cost.

To provide a highly durable heat shrinking apparatus with a simple structure.SOLUTION: A heat shrinking apparatus 10 receives from a supply wheel 12 a container V fitted with a cap C and covered with a heat shrinkable label. The heat shrinking apparatus 10 includes a plurality of plates 40 on the outer periphery of a rotating body 18, that support a bottom surface of the container V supplied from the supply wheel 12, and also includes a gripper 26 that grips an upper portion of the container V above the container V supported by the plate 40, a heating cylinder 24 that is provided below the gripper 26 and can accommodate the container V gripped by the gripper 26, and a lifting mechanism 30 that moves the gripper 26 up and down. When the container V is supplied by the gripper 26, the plate 40 receives the container V at a forward position, and when the container V gripped by the gripper 26 is moved into the heating cylinder 24, the plate 40 is positioned at a retracted position.SELECTED DRAWING: Figure 2

A packaging system (1) having at least one flow divider (5, 7) for dispensing articles (2) is disclosed. The packaging system (1) comprises a horizontal conveying device (15) for moving the articles (2) distributed on the at least one diverter (5, 7) and at least one industrial robot (14, 14 ') configured to apply packaging material onto the articles (2). The at least one diverter (5, 7) is configured to receive the articles (2) in paths (B1, B1 ') oriented parallel to each other, the number n of paths being n > = 2, and to distribute the articles (2) over a number m of paths. In this case, mgt; n is applied.

The utility model relates to the technical field of product packaging, and discloses a heat shrink film machine which comprises a fixed frame, the top of the fixed frame is fixedly connected with a servo motor, the output end of the servo motor penetrates through the fixed frame and is fixedly connected with a threaded rod, the outer side of the threaded rod is in threaded connection with a movable column, and the movable column is fixedly connected with the fixed frame. A first U-shaped plate is fixedly connected to the bottom end of the movable column, a pressing roller is rotatably connected to the interior of the first U-shaped plate, a first air cylinder is fixedly connected to the right end of the top of the inner side of the fixed frame, a second U-shaped plate is fixedly connected to the output end of the first air cylinder, and a groove is formed in the inner side of the second U-shaped plate. According to the shrink film packaging device, the threaded rod can be driven to rotate through the servo motor, at the moment, the movable column can move downwards on the outer side of the sliding rod, so that the pressing roller can be driven to move downwards, the shrink film is in a tensioning state all the time when an object is packaged, and therefore the situation that a packaged product does not meet the standard is avoided.

A feeding unit (G) of a wrapping tape (15) for a wrapping machine (10) is described, said feeding unit (G) comprising: a support frame (T), a pair of support pins each of which can rotate relative to the support frame (T), preferably independently from the other support pin, of which a first support pin (45A), adapted to receive a first reel (B1) of wrapping tape (15), and a second support pin (45B), adapted to receive a second reel (B2) of wrapping tape, the first support pin (45A) and the second support pin (45B) being mutually parallel and placed side by side at a distance from each other along a flanking direction (B), a first welding device (50A) adapted to weld an end section of the wrapping tape (15) of the first reel (B1) with a section of the wrapping tape (15) of the second reel (B2), - a carriage (85) adapted to receive and hold said end section of the wrapping tape (15) of the first reel (B1) and movable along the flanking direction (B) from a first receiving position wherein it is adapted to receive said end section of the first reel (B1) to a first welding position wherein it makes said end section available to the first welding device (50A) for welding it to the section of the wrapping tape (15) of the second reel (B2), a drive unit (90) connected to the carriage (85) and configured to move said carriage along the flanking direction (B).

A sheath for protecting an athletic equipment shaft is formed from a heat-shrink material. The heat-shrink material is heated within a thermal chamber designed to effectively and intentionally expose the heat-shrink material to a controlled heating environment. This controlled heating environment ensure a quality application of the heat-shrink material. The thermal chamber includes an enclosure defining an interior volume such that the interior volume is capable of holding the heat shrinkable sheath surrounding a portion of an athletic equipment shaft. The thermal chamber includes a first shaft support aperture extending through a first end of the enclosure, a second shaft support aperture extending through a second end of the enclosure, and an inlet aperture extending through the first end of the enclosure, wherein the inlet aperture provides a fluid communication port allowing pressurized air to pass from an exterior of the enclosure to the interior volume.

The present invention discloses a heat shrink machine clamping device, a heat shrink machine, and a method for assembling the heat shrink machine clamping device. The heat shrink machine clamping device is used for clamping a cable harness product (3) with a heat shrink tube (32). The heat shrink machine clamping device (1) comprises: a tray (10); a clamping component (12) mounted in the tray (10) for clamping and supporting the cable harness products (3); and several mounting components (11) attached to the base of the tray (10). The several mounting components (11) are designed to be magnetically attracted to the frame of the heat shrink machine, so that the heat shrink machine clamping device (1) can be detachably attached to the frame of the heat shrink machine via the several mounting components (11).The present invention enables quick assembly and replacement of the heat shrink machine clamp and is very user-friendly. Additionally, an identification code is provided on the heat shrink machine clamp to identify the model of the clamp, effectively preventing a heat shrink machine clamp that does not correspond to the model of the cable harness to be clamped from being mounted on the heat shrink machine frame.

The utility model relates to the technical field of sealing, cutting and film sleeving packaging machines, in particular to a novel vertical L-shaped sealing, cutting and film sleeving packaging machine which comprises a fixed cabinet. The device further comprises an electric sliding rail, a movable block, a fixed shell and a repair box door, the repair box door is installed on the surface of the front side of the fixed cabinet, and a built-in handle is arranged on the surface of the repair box door. When repair or maintenance is needed, the fixing shell and the packaging film conveying mechanism in the fixing shell can be moved to the lower portion together through the electric sliding rail, components which are originally located at the high position and difficult to touch are made to be easy to approach, the working difficulty of maintenance personnel is lowered, and due to the fact that the fixing shell can directly move downwards, the maintenance personnel can conveniently carry out maintenance. And under many conditions, parts needing to be maintained can be contacted without completely disassembling the equipment, so that time and labor force are saved, and some quick-wear parts needing to be frequently replaced, such as sealing strips or heating pipes, can be directly replaced at lower positions without complicated tools or additional help.

The utility model relates to an elastic diaphragm capsule thermal shrinkage packaging device which comprises a working box internally provided with a heating element and a circulating conveying roller set transversely penetrating through the working box and used for conveying an elastic diaphragm capsule from left to right. The hole pricking mechanism comprises a conveying belt which is transversely arranged and used for conveying an elastic film box sleeved with a protective film from left to right, the right end of the conveying belt is connected with the left end of the circulating conveying roller set, a hole pricking needle set is arranged over the middle of the conveying belt, the hole pricking needle set is driven by a lifting assembly to ascend and descend, and the top of the protective film is pricked when the hole pricking needle set descends. The pricking mechanism is arranged on the input side of the circulating conveying roller set, the pricking mechanism is used for pricking the top of a protective film arranged on the outer side of the elastic film box in a sleeving mode and then feeding the protective film into the circulating conveying roller set, the elastic film box subjected to pricking is fed into the working box through the circulating conveying roller set to be subjected to heat shrinkage packaging, and manual pricking is not needed in the whole process; operation is convenient, and working efficiency is improved.

A heating block assembly including one or more configurable insulator segments and a heater block having a first surface configured to removably receive the one or more configurable insulator segments, in which each of the one or more configurable insulator segments covers only a portion of the first surface. A method for sealing at least one portion of a package using such a heating block assembly is also disclosed.

The invention relates to a shrink-wrapping apparatus (1) for shrinking a packaging material (25) onto an assembly comprising at least one article (20). The shrink-wrapping apparatus (1) comprises a plurality of shrink-medium introduction devices (3) which are designed to apply shrink medium (SM) to the article assemblies (21) enveloped with packaging material (25). Arranged below the transport plane (TE) are two outer shrink-medium channels (7) which are designed to introduce shrink medium (SM) with an upwardly directed flow direction, via the transport plane (TE), into the interior (4) of the shrink-wrapping apparatus (1). The outer shrink-medium channels (7) each have a strip-like or linear shrink-medium outlet (9) or a row (10) with a plurality of aligned shrink-medium outlets.

To carry out a container inspection task, a sensor device optically detects sensor data and camera images relating to the container parts, and a real-time evaluation device evaluates spatially resolved sensor data in real time using a machine learning container inspection model which includes a set of parameters which are set to values which were learned as a result of a machine learning method. A set of container part features based on a machine learning method is predetermined, and the detected, spatially resolved sensor data are evaluated in relation to a plant inspection task different from the container inspection task, based on the predetermined set of container part characteristics, a plant inspection variable being determined depending on the inspection result of the carried out plant inspection task, which is provided for the control and / or regulation of the container treatment plant.

The application discloses a fruit and vegetable packaging machine and a packaging method thereof, and the packaging machine comprises a machine shell, a horizontal clamping and wrapping mechanism and a vertical clamping and wrapping mechanism are arranged in the machine shell; the horizontal clamping and wrapping mechanism clamps two sides of the fruit and vegetable and transversely wraps the fruit and vegetable, and can drive the fruit and vegetable to extend into the vertical clamping and wrapping mechanism; the vertical clamping and wrapping mechanism can cross the horizontal clamping and wrapping mechanism and vertically wrap the fruit and vegetable; the packaging method in the application adopts a cross clamping and wrapping mode to perform film packaging and wrapping, and after the wrapping is completed, thermoplastic setting is performed, so that the fruit and vegetable wrapping efficiency and wrapping effect are improved; the horizontal clamping and wrapping mechanism is specifically designed to clamp two sides of the fruit and vegetable and transversely wrap the fruit and vegetable, then the fruit and vegetable is clamped into the vertical clamping and wrapping mechanism, the fruit and vegetable is wrapped by the vertical clamping and wrapping mechanism and the horizontal clamping and wrapping mechanism cross each other, after the wrapping is completed, the film wrapped outside the fruit and vegetable is subjected to thermoplastic setting by a thermoplastic setting mechanism, and fruit and vegetable packaging is completed.

The invention belongs to the technical field of thermoplastic film packaging machines, and particularly relates to a thermoplastic film packaging machine for fruit juice packaging, which comprises a shrink furnace, a circulating system is arranged in the shrink furnace, the circulating system drives gas in the shrink furnace to circularly flow and heat the gas, and the circulating system blows hot gas to the bottom surface of a wrapping part from the lower part. Gas closing structures are arranged at the left and right ends of the shrinkage furnace; the shrink furnace can transport the wrapping part to move rightwards, so that the wrapping part becomes a finished product through a thermal shrinkage environment, hot air flow in the shrink furnace can circularly flow through the circulating system, the hot air flow is recycled, heat loss is reduced to the maximum extent, the heat utilization rate is high, and hot air flow loss channels can be reduced through the air closing structure; the heat loss is further reduced, the heat utilization rate is higher, a hot air flow loss channel can be reduced again through the elastic film on the air closing structure, the heat loss is reduced again, and the heat utilization rate is remarkably improved.

The utility model provides a shrink packaging machine for processing a heat shrink film, which relates to the technical field of heat shrink film processing and comprises a support frame fixedly arranged between the surfaces of two sides of a workbench, sleeves fixedly arranged on the surfaces of the inner walls of the vertical ends of two sides of the support frame and ejector rods matched with the sleeves to slide in the sleeves, and the sleeves are fixedly arranged on the surfaces of the inner walls of the vertical ends of the two sides of the support frame. The limiting device further comprises vertical grooves formed in the surfaces of the inner walls of the vertical ends of the two sides of the supporting frame, a transverse strip plate is slidably connected between the two vertical grooves, the transverse strip plate and the limiting frame are hinged through a hinge plate, and the limiting device further comprises an air cylinder fixedly installed on the surface of the top of the supporting frame. According to the utility model, through the limiting device, the two limiting frames are used for positioning and guiding the heat shrinkage films with different sizes, so that the condition that the subsequent processing quality of the heat shrinkage films is reduced due to the deviation of the heat shrinkage films during transmission is reduced to a certain extent.