6613 results about "Plastic film" patented technology

Frog farming method and frog cage are provided. The method comprises: I, putting young frogs in the frog cage in spring; II, putting lure attracting mosquitoes into the frog cage into the frog cage in summer and autumn, thereafter the frogs feed on the mosquitoes; III, avoiding snakes entering the frog cage in the place where the snakes inhabit; IV, covering the frog cage with plastic film in winter, mounting an electric lamp in the frog cage, increasing the temperature of air in the frog cage to keep the frogs not hibernating and promote the frogs to grow; V, adding artificial lure if necessary. The frog cage includes a fixed frog cage and a vehicle-mounted frog cage, both including inner tiers, wherein a water basin, a terrace and a stairway communicating the upper and lower tiers are arranged on each tier, and the frog cage is covered with a mesh enclosure. The frog framing method and frog cage have the advantages that the frogs are farmed in multi-tier cages, lures are used outdoors to attract insects, pests are eliminated for crops, natural ecology is balanced, and food sources are also provided for human; cage framing of frogs is very low in cost; frogs farmed have high reproductive rate, high disease resistance and high feed conversion capacity.

The invention discloses a metallocene polyethylene material, a composite mulching film and a preparation method thereof, and the metallocene polyethylene material comprises the following raw materials by mass: 75-85 parts of metallocene polyethylene resin, 15-25 parts of high density polyethylene, 0.05-0.2 part of a main antioxidant, 0.1-0.25 part of an auxiliary antioxidant, 1-2 parts of silane coupling agent modified nano zinc oxide, and 1-2 parts of silane coupling agent modified mica powder. And 0.05 to 0.2 part of a slipping agent. The prepared metallocene polyethylene composition has the advantages of excellent processability, tensile strength, mechanical strength, aging resistance and the like.

The invention relates to a plastic film defect detection device in the field of detection equipment, which is provided with a fixed clamping assembly and a movable clamping assembly to tension intermittently conveyed plastic films section by section instead of a floating roller tensioning mode adopted by a traditional film detection device, so that film vibration and motion artifacts during continuous conveying and shooting of the films are reduced, and the detection efficiency is improved. The shot plastic film has better flatness, the quality of the shot image is improved, and the accuracy of defect detection is further improved; meanwhile, the two ends of the to-be-detected film are clamped and fixed through the fixed clamping assembly and the movable clamping assembly, the probability that a tearing opening is expanded to a non-detection part of the film after the film is tensioned and torn is reduced, and the output of plastic film waste during detection is reduced; in addition, through the cutting assembly and the secondary feeding mechanism, cutting of the unqualified part of the film and secondary feeding of the part to be detected are achieved.

The invention belongs to the technical field of film tensile testing devices, and particularly relates to a plastic film tensile testing device, which comprises a detection bottom plate, the upper end of the detection bottom plate is slidably connected with two moving plates along the horizontal direction; the stretching mechanism is arranged at the upper end of the detection bottom plate and is used for driving the two moving plates to move oppositely; and the two clamping mechanisms are symmetrically arranged on the opposite sides of the two moving plates and used for clamping and fixing the plastic film, and each clamping mechanism comprises a fixing block fixedly connected to the side wall of the corresponding moving plate. By arranging the length adjusting mechanism, in the clamping process, for plastic films with different thicknesses, the downward sliding distances of the pressing block are different, so that the pressure borne by the piezoresistor below the pressing block is different, the stretching parameters of the piezoresistor can be adaptively adjusted according to the thicknesses of the films, and the clamping efficiency is improved. And the detected tensile strength of the plastic film is more consistent with the actual performance.

The invention discloses a self-growing robot and an environment exploration method thereof. The self-growing robot comprises a driving storage mechanism, a plastic film body, a flexible sensing unit, a signal receiving module, pneumatic artificial muscles arranged on the inner wall of the plastic film body and a tail end guiding sensing mechanism. The flexible sensing units are attached to the surface of the plastic film body, the sensing units are designed in an array mode, detection of obstacles in the environment is achieved while flexibility is guaranteed, the tail end guiding sensing mechanism is used for sensing the posture of the robot, information of a proximity sensor, an encoder and a gyroscope is combined, and the detection accuracy of the robot is improved. Navigation in an unknown environment can be realized; besides, pre-bending is set according to environment obstacle information, the environment obstacle is used for guiding the robot to grow, a larger area can be covered by combining pneumatic artificial muscles, a proximity sensor is used for detecting angular points in the environment according to the method, and the environment is explored by adopting a depth-first strategy; and a relatively high environment exploration rate can be realized within relatively few exploration times.

The invention discloses a multi-group film winding tension cooperative control system, which belongs to the technical field of plastic film production control, and comprises a plurality of groups of parallel winding devices, each winding device is provided with a motor, a winding wheel group, a belt, a speed sensor, a laser range finder, a data acquisition module, a tension calculation module, a speed adjustment module and a control execution module, the tension calculation module is used for acquiring corrected winding tension characteristics according to the film winding tension information, and the speed adjustment module is used for adjusting the winding speed according to the tension information and the historical tension information and outputting the corrected winding speed; through comprehensive consideration of multiple factors, the tension calculation accuracy is improved, cooperative control over the tension of multiple sets of films is achieved, and the purposes of dynamically adjusting the winding speed and then improving the system stability are achieved.

The invention relates to the technical field of film processing, and particularly discloses a plastic film processing waste recovery device which comprises a recovery box, a feeding port is formed in the top end of the recovery box, and the recovery box comprises a primary crushing mechanism used for primary crushing and a cleaning mechanism used for preventing winding. In the using process, through mutual cooperation of the primary crushing mechanism and the secondary crushing mechanism, waste materials can be further crushed into smaller shapes, gradual refining treatment on the waste materials can be achieved in a multi-stage crushing mode, the crushing uniformity and fineness are improved, the quality of recycled products is improved, and the recycling efficiency is improved. Through mutual cooperation of the primary crushing mechanism and the cleaning mechanism, waste remaining in notches between the crushing teeth can be scraped away in time, so that cleanliness between the crushing teeth is kept, it is guaranteed that the crushing rollers can continuously and efficiently conduct crushing work, normal operation of equipment is guaranteed, the shutdown maintenance time is shortened, and the production efficiency is improved. And the working efficiency and the reliability of the device are improved.

The invention provides a plastic film recycling and crushing device which comprises a rack, a crusher installed on the rack and a guiding and conveying mechanism for conveying a plastic film into the crusher, and the crusher comprises a crushing box body and two groups of crushing rollers arranged in the crushing box body; the guiding and conveying mechanism comprises a guiding and conveying table and a pushing and conveying assembly arranged on the guiding and conveying table and used for pulling the plastic film to move, and a material guiding box used for guiding the plastic film into the crushing box body is arranged on one side of the guiding and conveying table. A guiding and conveying mechanism is additionally arranged on one side of the crusher, the guiding and conveying mechanism pulls a plastic film to move forwards through a pushing hook on a conveying belt, and a pressing air cylinder can control a pressing table to descend so that the plastic film can be attached to a guiding and conveying table, and the pushing hook can hook the plastic film conveniently. Driving rollers are further arranged on the two sides of the guiding and conveying table and matched with the first pressing roller and the second pressing roller correspondingly, so that the conveying thrust on the plastic film is improved, the plastic film can be guided into the crusher through the material guiding box, and the plastic film is guided into the crusher in sequence.

The invention discloses a multi-mode plastic film solid waste identification method and system. The method comprises the following steps: acquiring an RGB-HSI data set; designing a multi-stage feature fusion network of an asymmetric double-trunk structure, wherein the multi-stage feature fusion network comprises two feature extraction branches and a fusion unit; one feature extraction branch carries out feature extraction on the RGB image, the other feature extraction branch carries out deep feature extraction on the HSI image, and a fusion unit carries out multi-stage fusion on feature maps of the two feature extraction branches by using an FPN backbone network; combining a multi-stage feature fusion network and an instance segmentation network Mask R-CNN to construct a model, and loading an RGB-HSI data set for training to obtain a prediction model; and multi-modal plastic film solid waste identification is realized by using the prediction model. According to the RGB and HSI hyperspectral feature fusion method provided by the invention, spectral information is mined from deep features by using the difference of spectral features between different materials, and the defects of RGB images are made up.

The invention relates to an arc slab manufacturing device and a manufacturing process. The arc slab manufacturing device comprises a rack, a device body arranged on the rack, a bearing table fixedly arranged in the device body, a mold arranged above the bearing table, a buckle cover arranged on the top of the device body and a plurality of radio frequency heaters arranged on the buckle cover. The fixing frame is arranged between the buckle cover and the device body and is hinged to the device body; the flexible molding film is arranged on the fixed frame and is positioned above the mold; the positioning and fixing mechanism comprises a positioning assembly and a fixing assembly; the positioning assembly is arranged on the die and used for automatically aligning and positioning the plate-shaped profile relative to the center of the die. The fixing assembly is arranged between the mold and the vacuum pump device and used for fixing the aligned and positioned plate-shaped sectional materials. The device has the effects that the plate-shaped profile can be conveniently and stably placed at the arc top of the mold, the positioning accuracy of the placement position of the plate-shaped profile is improved, and the positioning difficulty and the rejection rate are reduced.

The invention discloses an automatic strapping machine for a cigarette case production line. The automatic strapping machine comprises a rack, a paperboard outlet unit, a strapping unit and a finished product outlet unit. The rack comprises a lower bracket, a positioning backup plate, an upper bracket and a middle plate; the lower support comprises a working platform, two guide grooves transversely formed in the left middle portion of the working platform and a bundling opening formed in the right middle portion of the working platform. The positioning backup plate is fixed to the working platform and located on the front sides of the two guide grooves in parallel. The upper support comprises a top plate and a middle plate which is hung below the top plate and located over the bundling opening. The paperboard outlet unit comprises a paperboard pressing mechanism and a paperboard feeding mechanism; the bundling unit comprises a coated paper placing mechanism, a coated paper feeding mechanism, a coated paper pulling mechanism, a coated paper pressing mechanism, a coated paper cutting mechanism, a paperboard lifting mechanism, a coated paper bending mechanism and a coated paper hot-bonding mechanism; the finished product output unit comprises a finished product output table, a finished product receiving table and a finished product pushing mechanism. The strapping device is good in strapping quality and high in automation degree.

The utility model relates to the field of plastic film detection, and discloses a plastic film tear resistance detection device which comprises a working cabinet, the top end in the working cabinet is fixedly connected with a fixing plate, the left side and the right side of the bottom of the fixing plate are fixedly connected with first screw rods, the bottoms of the two first screw rods are fixedly connected with second connecting rods, and the second connecting rods are fixedly connected with the working cabinet. The bottoms of the two second connecting rods are fixedly connected with second screws, and the bottoms of the two second screws are fixedly connected with first bevel gears. According to the utility model, by simultaneously driving the two second motors, the first clamping plate and the second clamping plate clamp the film, the contact area between the film and the first clamping plate and the contact area between the film and the second clamping plate are increased, the film is prevented from falling off, the pointing mark points to the zero scale of the scale mark, and the film is subjected to a vertical tearing test through the driving assembly; and when the driving assembly stops driving, the beacon points to the maximum tensile force which can be borne by the thin film.

The utility model relates to an electrode assembly and a battery monomer adopting the same, the electrode assembly consists of a positive plate, a negative plate and a diaphragm, the electrode assembly is provided with a positive lug and a negative lug, and the size of the negative plate is larger than that of the positive plate; the corner of the positive plate is an inner arc angle; the corner of the negative plate is an outer arc angle; the positive plates and the negative plates are stacked in sequence, and the diaphragms are arranged between the adjacent positive plates and negative plates. The corner of the negative plate is designed to be the outward arc angle, and the corner of the positive plate is designed to be the inward arc angle, so that the aluminum plastic film PP layer is effectively prevented from being scratched in the stacking and packaging processes of the electrode plates. According to the design, the stacking mode of the electrode plates is improved, the possibility of physical interference is reduced, and meanwhile, the reduction of loss in the battery assembly process is also facilitated.

The invention discloses a waste mulching film cutting and breaking device which is used for cutting and breaking bundled waste mulching films and comprises a waste mulching film of a cutting mechanism, a waste mulching film of a primary breaking mechanism, a waste mulching film of a secondary fine breaking mechanism and a waste mulching film of an angle-adjustable discharge port mechanism which are sequentially connected. The waste mulching film of the bag cutting mechanism is in a funnel shape, and a plurality of cutter head cutting assemblies are arranged on the side wall of the bag cutting mechanism and used for cutting and packaging the oppositely-bundled waste mulching film. The waste mulching film of the primary crushing mechanism is used for primary cutting of the cut waste mulching film, the cut waste mulching film enters the waste mulching film of the secondary fine crushing mechanism for secondary cutting, and the waste mulching film of the secondary fine crushing mechanism serves as a fan. And the waste mulching film subjected to secondary cutting is blown out according to a preset angle through an angle-adjustable discharging opening mechanism. The waste mulching film bale cutting and crushing device can effectively solve the problems that a blade of an original device is heated and adheres to the blade, cutting is not smooth, and blockage is prone to occurring, and meanwhile disordered feeding of materials is achieved.

The invention discloses a self-cleaning anti-reflection coating liquid as well as a preparation method and application thereof, and belongs to the technical field of photovoltaic glass. The self-cleaning anti-reflection coating liquid is prepared from the following components in parts by weight: 100 to 120 parts of silicon dioxide composite resin emulsion; 0.5 to 2 parts of an adhesion promoter; and 10 to 20 parts of water. The self-cleaning anti-reflection coating liquid has the effects of being hydrophilic, self-cleaning and capable of improving the transmittance of incident light. Wherein the composite functional component is mainly modified silicon dioxide composite amphiphilic acrylic resin and is formed by silicon dioxide modification, acrylic monomer modification and emulsion polymerization, the prepared self-cleaning anti-reflection coating liquid is used for surface coating of plastic films, glass and the like, and the functions of hydrophilicity (the contact angle is smaller than or equal to 5 degrees), the anti-reflection rate of 3% and high weather resistance (QUV is larger than or equal to 500 h) can be achieved; wide market application prospects are realized in the photovoltaic glass industry.

The invention belongs to the technical field of film recycling, and discloses a waste film recycling device which comprises a base, a supporting box is installed at the top of the base, a box body is fixedly connected to the top of the supporting box, a feeding hole is formed in the side wall of the box body, a conveying frame is installed at the feeding hole, and a supporting plate is fixedly connected to the bottom of the conveying frame. A second belt conveyor is installed on the inner wall of the conveying frame, second sliding holes are formed in the two sides of the conveying frame correspondingly, second sliding blocks are slidably connected to the inner walls of the two second sliding holes correspondingly, the plastic film is conveyed through the second belt conveyor, and the plastic film is dried through a second drying machine; dust is blown into the box body through an air blower, dust diffusion generated during drying is avoided, and therefore clods on the surface of the plastic film can be dried in the plastic film conveying process, the pressure of equipment for later cleaning is reduced, the effect of saving water is achieved, and the cleaning cost is reduced.

The invention provides a wedge-shaped PVB intermediate film thickness control method and system, and belongs to the technical field of plastic film control, and the method comprises the steps: obtaining the target thickness of each position of a PVB film under different classifications through historical data; the actual thickness of each position of the PVB membrane is obtained, and the thickness adjustment amount of each position is obtained through the actual thickness and the target thickness; according to the thickness adjustment amount of each position, obtaining a process parameter adjustment amount and adjustment priority upgrading; adjusting the technological parameters according to the technological parameter adjustment amount and the adjustment priority; after a preset time interval, the actual thickness after parameter adjustment is obtained, and whether adjustment is conducted again or not is determined according to the actual thickness; the actual thickness and the target thickness of each position of the membrane are monitored and analyzed in real time, and the process parameters are dynamically adjusted in combination with historical data, so that the consistency and the stability of the thickness of the PVB membrane are effectively improved, the accurate control of the thickness is realized, the production efficiency and the product quality are improved, and meanwhile, different wedge-shaped degree requirements are met.

The invention relates to the field of plastic films, and particularly discloses a bio-based antibacterial cool-feeling breathable film and a preparation method thereof. The bio-based antibacterial cool-feeling breathable film is prepared from the following raw materials in percentage by weight: 49 to 66.5 percent of matrix resin, 30 to 40 percent of pore-foaming agent, 1 to 3 percent of silane modified cellulose nanofiber, 1 to 2 percent of antibacterial agent, 1 to 5 percent of composite cool-feeling agent and 0.5 to 1 percent of auxiliary agent, the matrix resin comprises PBAT resin and PLA resin in a mass ratio of (7: 3)-(5: 5); the composite cool feeling agent comprises nano aluminum nitride and graphene in a mass ratio of (5-15): 1. The bio-based antibacterial cool-feeling breathable film can be used for medical dressings, disposable medical supplies, mother and baby products and the like, and has the advantages of being good in breathability and moisture penetrability, high in antibacterial capacity, lasting in antibacterial effect, high in mechanical strength, high in cool-feeling coefficient, comfortable to wear and not prone to stuffiness.

The invention provides a winding device for a flexible plastic film, and belongs to the technical field of flexible plastic film winding, the winding device comprises a supporting frame and a winding mechanism arranged in the supporting frame, the winding mechanism comprises a rotating frame rotationally connected to one end of an inner cavity of the supporting frame, and a jacking assembly is arranged between the two ends of the inner cavity of the rotating frame; a plurality of bearing notches are formed in the outer arc surfaces of the circular disc bodies at the two ends of the rotating frame, a feeding assembly matched with the bearing notches is arranged at the other end of the supporting frame, a plurality of auxiliary rollers are rotationally connected into each bearing notch, a first motor is arranged on one side of the supporting frame, and an output shaft of the first motor is fixedly connected with one end of the rotating frame. By means of automatic feeding, alternate switching of the winding rollers, a jacking and compacting structure and a rapid cutting mechanism, continuous winding and non-stop coil unloading are achieved, the production efficiency is remarkably improved, meanwhile, deformation caused by winding looseness or inertia during coil unloading is avoided, and stable quality of finished products is guaranteed.

The utility model discloses a plastic film residue recycling machine which comprises a machine frame. A transmission mechanism; a picking mechanism; the two ends of the profiling wheel are rotationally connected to the rack, and the profiling wheel is in transmission connection with the picking mechanism; one end of the demolding mechanism is in transmission connection with an output end of the transmission mechanism; the two winding mechanisms are arranged at an acute angle; the winding mechanism comprises a packaging driving shaft, a packaging driven shaft, a packaging belt and two mounting plates; the packaging driving shafts and the packaging driven shafts are parallel and are connected to the two mounting plates in a rotating mode, and one end of one packaging driving shaft is in transmission connection with one end of the demolding mechanism. The packing belt is wound on the packing driving shaft and the packing driven shaft; the two baffles are arranged on the two sides of the two winding mechanisms correspondingly and connected to the two mounting plates located on the same side correspondingly; the two ends of the packaging transmission assembly are connected to the ends of the two packaging driving shafts correspondingly. The plastic film residue recycling machine can package plastic film residues, prevent the plastic film residues from being blown away when wind power is large, and avoid secondary pollution of the plastic film residues to the environment.

The invention provides an optical film, a polarizing plate, an image display device, and a method for selecting the optical film. An optical film having a low refractive index layer on a plastic film, the plastic film having a slow axis and a fast axis, the slow axis being an axis having a maximum in-plane refractive index, the fast axis being an axis orthogonal to the slow axis in a plane of the plastic film, and the low refractive index layer being located on a surface of the optical film. Radial polarized light enters from a surface of the optical film on the opposite side from the low refractive index layer under predetermined conditions, and a * value and b * value of the L * a * b * color system of transmitted light of the linearly polarized light are measured at 11 measurement points having different angles. On the basis of measurement at 11 measurement points, the sum of the second power of the a * difference between adjacent measurement points and the second power of the b * difference between adjacent measurement points is calculated at 10 adjacent points. In the optical film, sigma T, which represents the sum of the sums, is within a prescribed range.

The invention provides a manufacturing and using method of a multi-layer co-extrusion film, and belongs to the technical field of plastic film manufacturing, the multi-layer co-extrusion film comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a three-layer tower-type frame, the bottom plate and the three-layer tower-type frame are provided with a film drawing mechanism, the two sides of the three-layer tower-type frame are connected with adjusting mechanisms, and the adjusting mechanisms are arranged on the bottom plate. The inner wall of the adjusting mechanism is connected with a mold guiding mechanism, the extruders and the blowing machine are arranged below the three-layer tower type frame, and the multiple extruders communicate with the blowing machine. Lifting of a fixed plate is achieved through an electric telescopic rod, contact between a contact wheel and the surface of a film bubble is matched, if the air outlet amount is large, the force borne by expansion of the film bubble is large, the contraction degree of a movable rod is large, and otherwise, the contraction degree of the movable rod is small, so that the sliding process of the movable rod is completed; at the moment, the moving degree of the moving rod and the stress degree of the film bubbles can be obtained through the first pressure sensor and the second pressure sensor, and therefore the air outlet amount can be conveniently controlled.

The invention relates to the technical field of battery production and manufacturing, and particularly provides aluminum plastic film packaging equipment for a solid-state battery. The equipment comprises a rack, wherein a material table is arranged on the rack; the two overturning tables are symmetrically arranged on the two sides of the material table and arranged on the machine frame in a horizontal and opposite overturning driving mode. An adsorption platform is arranged on the overturning table; the two tensioning mechanisms are symmetrically arranged on the two overturning tables; the two edge sealing mechanisms are symmetrically arranged on the two overturning tables; the side clamping mechanism is arranged on the rack and is used for laterally clamping the battery cell; the pressing mechanism is arranged on the rack and is used for pressing the top end of the battery cell; and the lifting execution piece is assembled at the lifting end of the downward pressing mechanism. According to the equipment provided by the invention, the shaping and wrapping tightness of the aluminum plastic film on battery cell packaging is improved in various modes of packaging positioning, aluminum plastic film lifting and tensioning and the like, so that the influence of obvious packaging gaps on mechanical buffer protectiveness, heat dissipation, battery module assembly difficulty, light weight and the like of the battery cell is reduced, and the overall quality of the battery is improved.

The utility model discloses a novel carton film opening machine which comprises a machine frame and a conveying mechanism, the conveying mechanism comprises a first conveyor and a second conveyor which are installed on the machine frame, a discharging opening is formed in one side of the tail of the first conveyor, and the second conveyor is arranged at the discharging opening. A material pushing mechanism is arranged above the first conveyor at the discharging opening and is used for conveying the cartons on the first conveyor to the second conveyor from the discharging opening; film cutting mechanisms are symmetrically arranged on the two sides of the first conveyor and the two sides of the discharging opening; and a film tearing mechanism is arranged on the second conveyor. And a collecting mechanism used for collecting and storing the plastic film is arranged below the second conveyor and corresponds to the film tearing mechanism. The device is simple and effective in structure, the plastic film outside the carton can be efficiently cut and torn off, the torn plastic film can be effectively collected, and the production efficiency is remarkably improved.

The present invention belongs to the technical field of energy storage batteries. Disclosed are a low-cost and long-cycle-life sodium-ion energy storage battery, a negative electrode, a preparation method and a preparation device. The preparation method comprises: adding a sodium-ion negative electrode material, a conductive agent and a binder to a high-speed shearing mixer for dry mixing; adding the mixed materials to a double-shaft hot roller, and extruding same into a membrane, wherein the thickness of the membrane is controlled to be 90-350 μm, the temperature of the double-shaft hot roller is controlled to be 100-180°C, and the pressure is controlled to be 18-35 T; attaching the membrane onto aluminum foil having a thickness of 8-20 μm, the surface of which has been subjected to gluing treatment, wherein an adhesive layer of the glued aluminum foil has a thickness of 2-6 μm, and the adhesive layer contains 65 wt% of conductive carbon and 35 wt% of polymer glue; and hot-pressing the complex at 85-130°C, so as to form a sodium-ion battery negative electrode. The sodium-ion energy storage battery comprises an aluminum-plastic film shell, a separator, an electrolyte, a positive electrode and a negative electrode. In the whole manufacturing process of the sodium-ion energy storage battery negative electrode, the energy consumption is reduced, the environment is protected, and the manufacturing cost of the whole battery is reduced.

The present invention relates to the field of film processing, and discloses a traction device for PVC film processing, including a traction support, wherein a cooling mechanism for cooling and blowing the film, a first film guiding mechanism, a second film guiding mechanism, a third film guiding mechanism, a dust removing mechanism, a fourth film guiding mechanism and a winding mechanism are sequentially arranged on the top of the traction support. The present invention provides a first dust removing assembly and a second dust removing assembly in the dust removing mechanism, and the first dust removing assembly and the second dust removing assembly are switched for use, so that when the dust sticking roller on the dust removing assembly is replaced, it will not affect the cleaning effect of the dust on the surface of the plastic film, and the first dust removing assembly and the second dust removing assembly use dust sticking rollers, and the use of the dust sticking rollers can better clean the dust on the surface of the plastic film, and the operation is convenient and the cost is low.

The utility model discloses a heat-sealing and heat-cutting mechanism of a bag making machine. The heat-sealing and heat-cutting mechanism comprises a rack, the heat sealing mechanism is arranged on the rack; the hot cutting mechanism is arranged on the rack; the movable installation base is slidably installed on the rack, and a strip-shaped operation opening is formed in the middle of the movable installation base. The air cylinder is arranged on the rack and used for driving the movable mounting base to move repeatedly. The pressing platform is arranged on the movable mounting seat and is used for pressing to be in contact with the plastic film; according to the bag making machine, the downward pressing platform is started to make contact with the plastic film, and the heat sealing mechanism is started to penetrate through the operation opening to conduct hot pressing on the plastic film; the negative pressure adsorption assembly is started to adsorb the plastic film to the downward pressing platform, the first electric cylinder is started to drive the movable mounting base to move to the hot cutting station along with the plastic film, the situation that the position of the plastic film is prone to deviation in the conveying process is avoided, and the accuracy of the hot cutting position is guaranteed.

The utility model discloses a plastic film pendulum bob type impact testing machine which is characterized in that the plastic film pendulum bob type impact testing machine comprises a base, a plurality of supporting rods are arranged on the base, the supporting rods are all connected with the same driving part, lifting parts are arranged in the supporting rods, the driving part is connected with the lifting parts, and the lifting parts are arranged on the base. The driving part comprises a pendulum bob mechanism rotationally connected to the driving part around a rotating shaft and an electromagnet located at the same horizontal position with the rotating shaft, a fixing device used for fixing a film is arranged on one side of the supporting rod and comprises a lifting device, a control device is arranged below the base, and the control device is connected with the rotating shaft. The utility model has the advantages that the lifting devices are arranged on the driving part and the fixing device, so that the highest point of the pendulum bob and the height position of the fixing part are adjustable, and the impact force of the punch is improved by utilizing the conversion of gravitational potential energy.

The present invention relates to the technical field of the curing of precast concrete components, and in particular to an anti-cracking film covering device for a precast concrete component, and a film covering method. The anti-cracking film covering device comprises a film covering frame, wherein one side of the film covering frame is fixedly connected to side film covering modules distributed at the front and back; the top of the film covering frame is further fixedly connected to a horizontally arranged balance module; one side of the film covering frame is further fixedly connected to a synchronous movement module; and one side of the synchronous movement module is further fixedly connected to an obliquely arranged pressing module. In the present invention, by means of reserving a certain length of plastic film, a second hydraulic rod driving a friction plate to move downwards, and the bottom of the friction plate coming into contact with the plastic film, the purpose of fixing the plastic film is achieved; pulling the film covering frame realizes the covering of a precast component with a film by a single person; the arranged side film covering modules ensure that a side face of the precast component is pressed, thereby guaranteeing that the side face of the precast component is tightly covered with a film and ensuring the quality of the precast component; and under the action of a water pump, arranged nozzles can uniformly and stably water a surface of the precast component for curing.

The invention discloses a vacuum sealing method for high-temperature forming of a composite autoclave. The technical problem that a vacuum bag is prone to deformation at high temperature in the prior art is solved. The vacuum sealing method for high-temperature forming of the composite autoclave mainly comprises the steps of assembling of a forming mold, laying of prepreg, vacuum coating of the mold, curing of the autoclave and demolding. The vacuum bag used for wrapping the mold is made of aluminum foil or glass fiber reinforced aluminum foil. The plastic film has good ductility, electrical conductivity, thermal conductivity and shading performance, and can effectively block oxygen, moisture and peculiar smell. The problem of vacuum leakage in the curing process of polyimide and other high-temperature-resistant materials is effectively solved, and a reliable vacuum auxiliary material is provided for molding of products with high temperature resistance level and certain functionality. The method not only improves the forming quality of the composite material, but also reduces the production cost, and has remarkable economic benefits and social benefits.