47results about How to "Firm packaging" patented technology

The invention provides a gamma-cyclodextrin crystal form A and a preparation method thereof, an X-ray powder diffraction pattern of the gamma-cyclodextrin crystal form A has characteristic peaks when a 2 theta value is 9.15 + / -0.2 degrees, 12.04 + / -0.2 degrees and 16.35 + / -0.2 degrees, and the preparation method comprises the following steps: adding a certain amount of gamma-cyclodextrin into a certain amount of water, stirring, and carrying out ultrasonic dispersion to obtain a gamma-cyclodextrin crystal form A; the preparation method comprises the following steps: covering a bottle with a cover, heating in a biochemical incubator, dissolving, filtering a dissolved clear solution into a nuclear magnetic tube, adding a certain amount of hydroxypropyl methyl cellulose, vacuumizing, introducing nitrogen, fastening a rubber plug, heating in the biochemical incubator, setting heating and cooling procedures of the biochemical incubator, crystallizing, separating out white cluster-shaped solids at the bottom of the bottle, and drying, thereby obtaining the white cluster-shaped solid. And separating out a solid to obtain the gamma-cyclodextrin crystal form A. The crystal form A is low in energy, more stable, higher in stacking density and convenient to package, transport and store.

The utility model discloses a turnover type excess sorting structure which comprises a machine frame, a quantitative hopper and a discharging hopper, the discharging hopper is provided with a switching hopper, a first discharging hopper and a second discharging hopper, the output end of the quantitative hopper is connected with the input end of the switching hopper in a bearing mode, and the output end of the switching hopper is matched with the input end of the first discharging hopper and the input end of the second discharging hopper in a bearing mode. The switching hopper is installed on the machine frame in a rotatable mode, and the machine frame is provided with a rotation switching driving device which controls the switching hopper to be switched to be connected with the first discharging hopper or the second discharging hopper in an aligned mode. Compared with the prior art, overweight and excessive materials can be removed through switching, communicating and matching of the switching hopper, the first discharging hopper and the second discharging hopper, so that the materials packaged by the packaging mechanism can be accurately packaged all the time, packaging is stable, and the packaging efficiency is improved. And the problems of high packaging cost and low working efficiency of manufacturers caused by direct packaging due to inaccurate weighing of a traditional weighing mechanism are solved, and the operation is convenient.

The invention relates to the technical field of lithium battery module assembly, in particular to a clamping device and method for lithium battery module packaging. The conveying component comprises a conveying unit and a telescopic unit, the conveying unit is provided with a conveying channel for conveying the lithium battery module along a preset path, one end of the conveying unit is hinged to the supporting component, and the other end of the conveying unit is connected with the supporting component through the telescopic unit to achieve lifting of the end; the clamping component is located close to the side, hinged to the supporting component, of the conveying unit and comprises a first rotating plate and a second rotating plate, a clamping space for clamping the lithium battery module is formed between the first rotating plate and the second rotating plate, and the lithium battery module can enter the clamping space through the conveying channel; according to the lithium battery module packaging device, the conveying component which can incline and is provided with the conveying channel and the clamping component with the clamping space are arranged, when the conveying component inclines, the lithium battery modules on the conveying component slide to the clamping component, workers do not need to take down the packaged lithium battery modules and then place the lithium battery modules one by one, and the lithium battery module packaging efficiency is improved.

The utility model relates to project data packing and encapsulating technical field, especially intelligent collection and encapsulation integrated machine of project data, including machine case, the left and right symmetry of machine case top portion is provided with the placing plate, the back of machine case top portion is provided with the baffle, is provided with the collection component that can align and arrange the project data that needs packing and encapsulating on machine case, rotationally is provided with the rotating shaft between two baffles, the swing frame is symmetrically set up on the rotating shaft. The device has corresponding structure auxiliary in the encapsulation link, the operation such as fixing, pulling and tightening of thermoplastic encapsulation strip. The clamping plate and support plate cooperate to stably fix one end of the encapsulation strip, the servo motor drives the rotating column to rotate to accurately pull the encapsulation strip to the taut state, and the tightening degree can also be controlled by setting the rotation number, which avoids the material bag from falling off and prevents the internal material from being damaged due to tightness.

The invention belongs to the technical field of medical apparatus and instruments, and discloses preparation equipment of a double-layer ostomy bag and a control method, and the preparation equipment comprises a profile rack, a Foma wheel, a spunlace feeding rack, a finished product discharging conveyor belt and other components. The control method for the preparation equipment of the double-layer ostomy bag comprises the steps that raw materials are guided into the equipment through the feeding assembly; the raw materials are formed and processed through a spunlace discharging frame; through pressing and forming of a Foma wheel, a double-layer bag with a sealed bottom is formed; and the final finished product is output through the finished product discharging conveyor belt and is packaged and stored. According to the double-layer ostomy bag manufacturing equipment, efficient production of double-layer bottom-sealed bags is achieved, the production efficiency and the product quality are improved, and the requirement of the market for the double-layer bottom-sealed bags is met.

The present invention relates to an in-situ encapsulated catalyst and its application. The catalyst is composed of metal nanoparticles and CeO2 carriers, the metal nanoparticles are prepared by a reduction method, and are one or two of Ni, Co, Ru, and Pt, the carrier CeO2 is prepared by a coprecipitation method, and the metal is loaded on the carrier by an impregnation method, and the metal loading is 0.05-5% of the catalyst mass to obtain a loaded catalyst. In the methane chemical chain reforming process, it shows very high stability and activity, and the methane, carbon dioxide conversion rate and synthesis gas selectivity are close to 100%. The present invention can also be used for solar thermal cracking water to produce hydrogen, because its in-situ generated high defect coating structure has excellent anti-carbon deposition ability, and the purity of hydrogen can reach 100%. In addition, the present invention can also be used for the catalytic decomposition of hydrazine propellants, ADN-based and HAN-based green propellants.

The invention relates to an O1 / W / O2 type double emulsion as well as a preparation method and application thereof. The O1 / W / O2 type double emulsion comprises an inner-layer oil phase O1, a middle-layer water phase W and an outer-layer oil phase O2, the inner-layer oil phase O1 comprises essence and a first solvent; the middle layer water phase W comprises a water-soluble emulsifier and water; the outer-layer oil phase O2 comprises an oil-soluble emulsifier and a second solvent; the water-soluble emulsifier comprises a combination of flaxseed gum, whey protein isolate and Tween 80. The emulsion provided by the invention has the advantages of simple, cheap and easily available raw materials, simple preparation method and low cost; the obtained emulsion improves the stability of the essence, the essence loading rate is high, the essence has good fragrance loading and holding performance, and controlled release of the loaded essence can be achieved through temperature change.

The utility model relates to instrument protection equipment technical field especially is a pressure gauge protection device, include: a pressure gauge protection device, including: pressure gauge main part, the one side of pressure gauge main part is provided with threaded pipe, protection subassembly, protection subassembly includes protection mechanism and the fitting mechanism, protection mechanism is used for protecting threaded pipe, the fitting mechanism is used for driving protection mechanism to fit in threaded pipe, switching subassembly, switching subassembly includes support frame, connecting mechanism and unlocking mechanism, support frame is connected in pressure gauge main part through connecting mechanism, protection mechanism sets up in support frame, and the protection of connecting mechanism of protection mechanism is used for removing through pulling unlocking mechanism. Through using the utility model can carry out the quick switching of the protection state of pressure gauge, is convenient for subsequent pressure gauge or threaded pipe itself to clean, check or maintenance work.

The utility model discloses a magnetic stirrer for seed skin breaking, which relates to the technical field of test instruments and comprises a blade seat for mounting blades, the periphery of the blade seat is provided with a plurality of tips which are radially and uniformly distributed, the blades are mounted in the tips, and cutting edges of the blades extend out of the edges of the tips. The blade is detachably and fixedly connected with the tip; and a magnet is arranged in the center of the blade seat. Through the radial blade layout and the design of the double-sided blades, a multi-directional peel breaking working surface is formed, the treatment uniformity is improved, the detachable connection design supports blade angle adjustment, cutting edge extension length and abrasion replacement, and the requirements of different seeds are met; the standardized size is adaptive to a conventional magnetic stirrer, and special equipment transformation is not needed.

The application relates to a driving device and a blood pump. The driving device comprises a motor, an outer sealing pipe and a detection assembly. The motor comprises a motor shell, and the motor shell is provided with a detection port. The outer sealing pipe is arranged in the motor shell and fixedly connected with the motor shell. An outer side surface of the outer sealing pipe is provided with a side opening, and the side opening is arranged opposite to the detection port. The detection assembly is arranged in the outer sealing pipe. The detection assembly comprises a sensor and an inner sealing pipe. The inner sealing pipe is fixed in the outer sealing pipe. A distal end of the inner sealing pipe extends to an inner side of the side opening and is provided with a sensing port corresponding to the side opening. A probe of the sensor and a part of an optical fiber connected with the probe are packaged in the inner sealing pipe, and the probe corresponds to the sensing port. The driving device and the blood pump can tightly package the sensor in the inner sealing pipe and the outer sealing pipe, and the packaging firmness of the sensor is improved.

The invention belongs to the technical field of packaging films, and particularly discloses a laser heat shrinkage film and a preparation method thereof. The laser heat shrinkage film comprises a heat sealing layer, a heat shrinkage layer and a laser pattern layer, the raw material of the heat sealing layer comprises polypropylene and / or polyethylene, the raw material of the heat shrinkage layer comprises polypropylene and polyethylene, and the laser pattern layer is a holographic information layer or a laser ink layer. The laser heat shrinkage film prepared in the invention has good strength, tear resistance and heat shrinkage, all the components are mixed, and the prepared laser heat shrinkage film has high transparency, high shrinkage rate, anti-counterfeiting function, durability, aesthetic property and protectiveness.

The utility model discloses a twisting gear for a packing wire, relates to the technical field of twisting mechanism parts of a bundling machine, and aims to solve the technical problems that in the prior art, a twisting gear of a wire feeding mechanism of a traditional wire bundling machine can only be used for bundling packing wires with the diameter of 0.2 mm, and the packing wires are easy to break during transfer in a wharf or a workshop; and unnecessary safety accidents and unnecessary benefit loss are avoided. A twisting gear is rotationally connected into the gear seat, a V-shaped groove is formed in one side of the twisting gear, the slotting size of the V-shaped groove is 9 mm, the slotting angle of the V-shaped groove is 5.01 degrees, the gear seat is arranged above the gear box, a transmission gear in meshed connection with the twisting gear is arranged in the gear box, and the transmission gear is connected with the twisting gear in a meshed mode. A transmission gear is arranged in the gear box, a driving gear in meshed connection with the transmission gear is arranged in the gear box, a linkage sleeve is connected in the driving gear, wedging teeth are arranged in the linkage sleeve, a clamping head is arranged on the gear box, and a rotating shaft is connected between the clamping head and the gear box.

The present invention discloses a two-stage parachute structure for ammunition parachutes, which belongs to the technical field of parachute applications. The two-stage parachute structure includes a first-stage parachute structure and a second-stage parachute structure. By using the corresponding arrangement of the two parachute structures, the combination arrangement and sequential operation of the two-stage parachute can be realized, thereby realizing the secondary deceleration of weapons and ammunition, ensuring that the dynamic load of the weapons and ammunition before the main parachute is opened does not exceed a certain value, avoiding damage to the parachute fabric, the ammunition structure, and the internal instruments and meters of the ammunition due to excessive dynamic load when the main parachute is opened, and ensuring the normal operation of the parachute system and the ammunition. The two-stage parachute structure for ammunition parachutes of the present invention has a simple structure, is easy to set up and control, can effectively realize the normal operation of weapons and ammunition under transonic or supersonic conditions, ensures the normal operation of the parachute main parachute, the ammunition structure, and the internal instruments and meters of the ammunition, improves the reliability and stability of the operation of weapons and ammunition, and has good application effects and promotion value.

The invention discloses a rapid preparation method of a composite thermal runaway protection material. The composite thermal runaway protection material comprises the following components in percentage by mass: 71-95% of an inorganic heat absorption material, 0-5% of an inorganic light guide material, 0-12% of polyvinyl alcohol, 0-1% of long-chain alkyl diacid and 5-16% of UV curing packaging resin. The preparation method comprises the following steps: obtaining a fluffy mixture by using a mixing process, homogenizing the fluffy mixture through secondary homogenizing equipment by using a homogenizing process, controlling the temperature of the mixture in the homogenizing process to be 0-80 DEG C, and performing a forming process and a curing process on the uniform mixture to obtain the composite thermal runaway protection material. A homogenizing process is added, so that the powder spreading uniformity in the process of preparing the large-area large-size composite thermal runaway protection material is improved, and the strength of the composite thermal runaway protection material is improved. The heat absorption enthalpy value of the composite thermal runaway protection material is high, so that the adjacent batteries are prevented from continuously heating, and fire explosion is avoided; and the surface of the inorganic heat-absorbing material is coated with UV-cured packaging resin, so that stable packaging of the inorganic heat-absorbing material is realized.

This application discloses an intracranial pressure probe and its packaging method, relating to the technical field of intracranial pressure probes. The intracranial pressure probe includes a sensor and a coated lead wire, with the proximal end of the sensor electrically connected to the distal end of the coated lead wire. It includes: a protective frame with a window on its side wall; the sensor is disposed within the protective frame and corresponds to the window; a plug with a convex spherical surface at the distal end of the protective frame, the edge of which smoothly connects to the side wall of the protective frame; and a conduit sleeved over the coated lead wire and connected to the proximal end of the protective frame. A window transition structure is provided between the end of the sensor and the edge of the window, and a first transition structure is provided between the proximal end of the protective frame and the outer surface of the conduit. Both the window transition structure and the first transition structure are arc transitions. A gel filling layer is provided inside the conduit, between the protective frame, and between the sensor. This solves the problem of intracranial pressure probes easily scratching tissue in related technologies.

The utility model discloses a stacking and packaging device for integrated circuit chips, which comprises a base, two sides of the top of the base are fixedly connected with side plates, a bottom plate is arranged between the two side plates in a sliding manner, the bottom plate is horizontally arranged, sliding mechanisms for sliding the bottom plate are arranged in the two side plates, two moving blocks are arranged at the top of the bottom plate in a sliding manner, and the moving blocks are arranged on the bottom plate in a sliding manner. The top of each moving block is fixedly connected with two stand columns, every two of the four stand columns form a pair, clamping plates are fixedly connected between the two pairs of stand columns, a top plate is arranged at the top of the base, four connecting grooves are formed in the top of the top plate, and the four stand columns slide in the four connecting grooves correspondingly. The two clamping plates slide on the top of the top plate, and a clamping mechanism is arranged on the surface of the bottom plate. According to the utility model, through the arrangement of the connecting rod, an integrated circuit chip can be clamped when being packaged, and meanwhile, the integrated circuit chip is more stable, so that the use effect of the device is improved.

The invention discloses a manufacturing method of a solar luminous card. The manufacturing method comprises the following steps: step 1, manufacturing a solar power generation material into a power generation body; 2, spraying a pre-designed pattern on the transparent film; 3, a light-emitting unit and a control circuit are welded to the front face or the back face of the power generation body; and 4, laminating the transparent film with the pattern on the power generation body. According to the invention, the application of the solar material in a miniature scene, especially a gift card, can be realized, and the production cost of the solar material in the miniature scene is reduced.

The invention relates to a covered cannula, a branch sheath and a delivery system, a cannula body is provided with a cannula inner cavity, the near end and the far end of the cannula body are provided with a near-end tube opening and a far-end tube opening which are communicated with the cannula inner cavity, the cannula body is provided with a connecting area, and the strength of the connecting area is larger than that of other areas in the cannula body; the binding structure is connected with the connecting area and used for connecting the cannula body with the main body support. The covered cannula is used for binding the branch stent and is directly connected with the main stent, and the binding structure of the covered cannula is used as an intermediate connecting structure, so that the branch stent, the covered cannula and the main stent can be firmly connected; the covered sleeve is always connected with the main body stent, so that the covered sleeve is always and firmly wrapped on the branch stent, the covered sleeve is not easy to be separated from the branch stent, and the protection of the branch stent and the accurate alignment of branches are realized.

The utility model discloses an optical lens packaging mechanism, including frame, frame one end is equipped with the material conveying belt, be equipped with the lifting support cylinder on the frame, the movable end of lifting support cylinder is equipped with the first drive motor, the output of first drive motor is equipped with the first branch support, the lower extreme of first branch support is equipped with the mechanical claw, be equipped with the second drive motor on the frame, the output of second drive motor is equipped with the second branch support, be equipped with the bag suction frame on the second branch support, be equipped with the first bag suction tray on the bag suction frame, frame one end is equipped with the pull push rod, the movable end of pull push rod is equipped with the pull frame, be equipped with the second bag suction tray on the pull frame, the first bag suction tray is cooperated with the second bag suction tray, and the equipment saves the driving time, makes the lens and places stable, improves the efficiency of packing work.

This invention provides a quick-locking UAV external pod with front and rear shells, including a pod mount, a pod shell, a first payload module, a second payload module, a mounting assembly, a payload mounting assembly, and electrical quick-connect fittings. This invention solves the problem of cumbersome operation procedures and low assembly efficiency during payload replacement or maintenance disassembly and assembly due to the lack of an effective guiding and positioning, adjustable position, and repeatable positioning structure in related UAV external pods during mounting.

The utility model belongs to the technical field of extension ladder packaging, and particularly relates to extension ladder full-automatic packaging equipment which comprises annular motor film winding equipment used for packaging extension ladders, and a winding area used for conducting film winding on the extension ladders is transversely arranged on the annular motor film winding equipment in a penetrating mode. The two symmetrical sides of the winding area are provided with conveying mechanisms used for conveying, the extension ladder is conveyed from one side of the winding area to the other side based on conveying, two pressing mechanisms capable of ascending and descending are installed above the conveying mechanisms, and the two pressing mechanisms are arranged on the two sides of the annular motor film winding equipment correspondingly. According to the automatic packaging machine, the conveying mechanism and the annular motor film winding equipment which are matched with each other are additionally arranged, the conveying mechanism and the annular motor film winding equipment can replace manual work to complete packaging, the labor cost is reduced, and the working efficiency is improved.

The invention relates to a pump (1) having an electric motor (2), which has a rotor (3) and a stator (5) surrounding the rotor, which stator is injection-molded with a plastic housing (4) and has an end-side opening (6), having a circuit board (7), which closes the end-side opening (6) in a sealing manner and, together with the stator (5), defines an interior space (9) through which a cooling fluid can flow, the rotor (3) is arranged in the interior space. The key point of the invention is that an elastic seal (10) is arranged between the plastic housing (4) and the printed circuit board (7), and at least two fastening elements (11) are arranged on the end face of the plastic housing (4), which fastening elements are connected to fastening contours on the printed circuit board (7).

The utility model relates to the technical field of hospital clothes for hemodialysis patients, in particular to a patient clothes for nursing hemodialysis patients in hospitals, which can bring convenience to the hemodialysis of the patients, improve the protection for arms of the patients with fistula, and avoid pain caused by touch. Comprising a garment body, sleeves are arranged on the two sides of the garment body, a garment zipper is sewn in the middle of the front side of the garment body, a garment zipper is slidably arranged on the garment zipper, openings are formed in the front faces of the two sets of sleeves, cuff zippers are sewn on the two sets of openings, and cuff zippers are slidably arranged on the two sets of cuff zippers. Left soft cushions and right soft cushions are fixedly sewn to the left sides and the right sides of the interiors of the two sets of sleeves respectively, loop-side hook-and-loop fasteners are fixedly arranged at the top ends of the two sets of left soft cushions in an embedded mode, hook-side hook-and-loop fasteners are fixedly arranged on the left sides of the bottom ends of the two sets of right soft cushions in an embedded mode, and the two sets of hook-side hook-and-loop fasteners are adhered to the two sets of loop-side hook-and-loop fasteners respectively. The lower sides of the interiors of the two sleeves are fixedly connected with protective soft cushions.

The utility model discloses a packing material runner module of a pin packing machine, which comprises a first mounting table, a first runner mounting rack, a second runner mounting rack, a material box and material belt cutting mechanism and runners, wherein the first mounting table and the first runner mounting rack are fixed on a lower worktable; the second runner mounting rack and the material box and material belt cutting mechanism are arranged on the first mounting table; the device comprises a first mounting table, a runner arranged on the first mounting table, a runner propelling motor arranged on the runner, a material box and material belt feeding guide mechanism arranged on the first mounting table and arranged at the rear end of the runner, a material box propelling mechanism arranged at the rear end of the runner and used for conveying and propelling a material box, and a material box side pressing mechanism fixed to the first mounting table and arranged on the runner in a sleeving mode. The material box and material belt feeding guide mechanism is used for guiding and adjusting the material box and material belt discharged by the coiled material discharging module; the material box side pressing mechanism is used for pressing the side edge of the material box; the two material box and material belt cutting mechanisms are arranged at the front end and the rear end of the material box side pressing mechanism correspondingly.

The invention discloses a wireless charging and signal transmission device for a deep-sea UUV (Unmanned Underwater Vehicle) connection system. The wireless charging and signal transmission device comprises a transmitting end mounted on a connection platform and a receiving end mounted on a deep-sea UUV, each of the transmitting end and the receiving end comprises a coil / antenna integrated mounting piece, the bottom of the coil / antenna integrated mounting piece is connected with the switching end cover, the top of the coil / antenna integrated mounting piece is provided with three grooves, an antenna is mounted in a first groove, a magnetic core is mounted in a second groove, a coil is mounted in a third groove, and the three grooves are uniformly encapsulated through epoxy resin; the non-metal sealing cover covers the top of the antenna / coil integrated mounting piece; the switching end cover is connected with the coil / antenna through a watertight cable; the cavity is internally provided with an energy and signal output / receiving circuit; the bottom end cover is provided with a signal-electricity composite watertight connector which is connected with the UUV or the connection platform; the transmitting end further comprises a flexible guide cylinder which is fixed on the coil / antenna integrated installation piece. The device is compact in size, light in weight, reliable in sealing and capable of reliably working in the deep sea environment.

The utility model discloses a packaging material taking module of a pin packaging machine. The packaging material taking module comprises a first stand column mounting column, a guiding adhesive tape discharging and cutting mechanism, a first transverse carrying module and a guiding adhesive tape taking and carrying assembly. The guiding adhesive tape discharging and cutting mechanism comprises a guiding adhesive tape discharging mounting seat fixed on the lower workbench, a first front-back sliding assembly and a first front-back movement pushing air cylinder which are arranged on the guiding adhesive tape discharging mounting seat, and a guiding adhesive tape mounting seat which is arranged on the first front-back sliding assembly and is driven by the first front-back movement pushing air cylinder; the guiding adhesive tape reel, the guiding adhesive tape cutting mechanism, the guiding adhesive tape rear clamping mechanism and the guiding adhesive tape front clamping mechanism assembly are arranged on the guiding adhesive tape mounting base; the guiding adhesive tape front clamping mechanism assembly pulls the guiding adhesive tape released by the guiding adhesive tape reel, the guiding adhesive tape is clamped by the guiding adhesive tape rear clamping mechanism and the guiding adhesive tape front clamping mechanism assembly together, and the guiding adhesive tape to be bonded is obtained through cutting of the guiding adhesive tape cutting mechanism.

The invention discloses a bacteriostatic erection-assisting time-delay gel, and belongs to the field of external medicines. The gel is prepared from the following components: glycerol, 1, 2-propylene glycol, ethanol, polyethylene glycol distearate, potassium polysaccharide sulfate, 4-(butylamino)-benzoic acid 2-(dimethylamino) ethyl ester and sustained release elements containing traditional Chinese medicine extracts. Wherein the sustained-release element takes fibroin nano-microspheres as a carrier, carries traditional Chinese medicine extracts of fructus cnidii, saffron crocus and salvia miltiorrhiza, and enhances blood circulation and local metabolism through a sustained-release mechanism. The gel in the technology realizes multiple effects of reducing sensitivity, prolonging sexual life time and improving local blood circulation through matching of the components and a slow release technology.

The utility model relates to the technical field of material packaging, and discloses a full-automatic winding and packaging machine which comprises a packaging table, clamping mechanisms are arranged on the left side and the right side of the top of the packaging table, a movable packaging mechanism is arranged in the packaging table, and the movable packaging mechanism comprises a moving assembly and a packaging assembly. The moving assembly is arranged in the packaging table, the packaging assembly is arranged at the top of the moving assembly, the packaging assembly comprises a supporting frame, the supporting frame is arranged at the top of the moving assembly, and a circular ring is fixedly connected to the inner side of the supporting frame. A winding roller is inserted into an L-shaped plate, the L-shaped plate is mounted at the bottom of a fixing plate through a bolt, and after a material is fixed, a first motor drives a rotating gear to rotate through a rotating shaft, so that the rotating gear drives the fixing plate to rotate through a gear ring, and the fixing plate can drive the winding roller to rotate through the L-shaped plate; and the packaging film on the winding roller can be wound on the periphery of a material needing to be packaged.