116 results about "Puncture resistance" patented technology

The invention discloses a preparation process of cutting-resistant and puncture-proof protective gloves, and belongs to the technical field of preparation methods of protective gloves. According to the technology, the four steps of pretreatment, composite coating material dipping, dipping of different butadiene-acrylonitrile rubber latexes and partitioned vulcanization treatment are adopted, balance of protection performance and wearing comfort is achieved through combination of technology optimization and material innovation, the cutting resistance of the prepared protective gloves reaches the grade E of the GB24541-2022 standard, the puncture resistance and the tear resistance both reach the grade 4, and the service life of the protective gloves is prolonged. And the composite material is good in air permeability and excellent in durability, is particularly suitable for high-risk operation scenes such as military, security and metal processing, and has remarkable technical progress and industrialization value.

This application relates to the technical field of polymer materials, and specifically discloses a puncture-resistant film and its preparation process. A puncture-resistant film is composed of an outer layer, an intermediate layer, and an inner layer, and the outer layer, the intermediate layer, and the inner layer are all bonded by a solvent-free adhesive; the outer layer is a PET film layer; the intermediate layer is a nylon film layer; the inner layer is mainly prepared from the following raw materials in parts by weight: 36-48 parts of LDPE resin, 20-38 parts of LLDPE resin, 5-10 parts of MLLDPE resin, 1-5 parts of HDPE resin, 5-8 parts of nano-organic montmorillonite, 0.5-1 part of nano-silica sol, 5-8 parts of compatibilizer, 0.3-0.5 part of antiblocking agent, 0.3-0.5 part of slip agent, 0.1-0.3 part of antistatic agent, and 0.1-0.2 part of processing aid. This application can improve the puncture resistance of the film.

The invention relates to the technical field of test equipment, in particular to a tire puncture resistance automatic simulation test machine and a test method thereof. The device comprises an objective table, a protective cover and a device body, the objective table comprises an objective plate and a vertical support, the protective cover is installed on the vertical support, and the device body covers the interior of the protective cover; a transparent observation window is arranged at the lower part of the protective cover; the device body comprises a driving module, a puncturing module, a fastening module and a detection module which are sequentially arranged from top to bottom. Full-process automation is achieved through the control box, the driving electric cylinder is controlled to move, key data such as pressure and displacement are collected in real time, a puncture force-displacement curve graph is formed, the puncture resistance of the tire is quantitatively evaluated, the mechanical parameter collection error is smaller than or equal to + / -3.0%, and the working efficiency is effectively improved by 50%; and a plurality of device bodies can be placed in the protective cover, so that batch tests of different batches and different dynamic parameters are realized, and diversified test requirements are met.

The invention relates to the technical field of tire detection, in particular to a tire puncture resistance detection device and a use method thereof. The tire puncture resistance detection device comprises a portal frame, a tire mounting mechanism, a puncture mechanism and a driving mechanism for driving the puncture mechanism to move up and down are arranged on the portal frame from bottom to top, the puncture mechanism comprises a needle head and a closed needle cylinder, and a central air hole communicated with the needle cylinder is axially formed in the needle head. A rotating ring is rotationally arranged on the outer side wall of the needle cylinder, a plurality of rectangular blades deviating from the axis of the needle cylinder are arranged on the circumference of the outer side wall of the rotating ring at equal intervals, an annular groove communicated with the needle cylinder in a sealed mode is formed in the inner side wall of the rotating ring, and exhaust holes communicated with the annular groove are horizontally formed in the blades. The puncture resistance of the tire can be rapidly judged, the tire is easy to install, and the service life of equipment is long.

The invention discloses a stab-resistant rubber, a preparation method of the stab-resistant rubber and a stab-resistant tire, the stab-resistant rubber comprises the following components in percentage by weight: 40-60% of butyl rubber, 5-15% of aramid fiber, 10-15% of nano silicon dioxide, 10-20% of plasticizer, 1-3% of vulcanizing agent and 5-10% of additive, and the additive comprises an anti-aging agent, an accelerant and a filler which are mixed. The puncture resistance of the puncture-proof rubber is remarkably improved, puncture of a tire by a sharp object can be effectively prevented, and the risks of tire air leakage and tire burst are greatly reduced.

Disclosed in the present invention are a puncture-resistant fabric structure having both comfort and puncture-resistant performance, and a puncture-resistant glove. The puncture-resistant fabric structure comprises an inner layer, an outer layer, and a puncture-resistant layer located between the inner layer and the outer layer; the edges of the inner layer and the outer layer are connected together; the puncture-resistant layer comprises a body and a plurality of lugs provided on at least a partial area of the edge of the body, and the area is referred to as a connecting area; the lugs are fixed to connecting portions of the inner layer and the outer layer; and the edge of the body located in the connecting area is not connected to the inner layer and the outer layer. The puncture-resistant layer of the present invention is connected to the inner layer and the outer layer by means of the lugs, so that the puncture-resistant layer is locally fixed. During use, the puncture-resistant layer can remain in a predetermined position without slipping, and inward curling of the puncture-resistant layer is also prevented, thereby ensuring the reliability of puncture resistance. In addition, the present invention is applied to a human body joint part, and stretching by means of the lugs can be achieved during movement of the human body joint without hindering the joint movement, so that any puncture-resistant material having no elasticity or very limited elasticity can be used at a position having a high flexibility requirement for human body movement.

The present invention relates to the field of control cable technology, specifically a corrosion-resistant flexible control cable, including a control cable protective sleeve, a driving component, a convex ring component and a cable core conductor. The convex ring component forms a serrated structure on the inner wall of the protective sleeve, and the deformation cavity enclosed by adjacent convex ring components is filled with water-blocking paste, which improves the flexibility of the cable through the buffering of the valley deformation cavity and supports the convex ring to enhance the pressure and puncture resistance; the driving component drives the convex ring component to slide back and forth along the axial direction, so that the valley and peak positions of the serrated structure alternate, disperses the stress during high-frequency bending, avoids concentrated force rupture in the valley, and extends the life of the protective sleeve. In addition, the water-blocking paste is filled in the valley, which can balance the bending radius and strengthen the sealing protection, and is constrained by the separation of the supporting convex ring to prevent aggregation and loss, thereby ensuring stable protection performance. Through structural innovation, the cable achieves a balance and improvement in flexibility, pressure resistance, corrosion resistance and long-term protection capabilities in high-frequency bending scenarios.

Transverse ribs and vertical ribs are arranged in a plate frame, latticed reinforcing ribs are formed by the transverse ribs and the vertical ribs, an inner-layer glass fiber plate is arranged on each of two sides of each reinforcing rib, a base plate is arranged on the outer side of each inner-layer glass fiber plate, an outer-layer glass fiber plate is arranged on the outer side of each base plate, a stab-proof panel is arranged on the outer side of each outer-layer glass fiber plate, and the stab-proof panel is arranged on the outer side of each outer-layer glass fiber plate. Four edges of the inner-layer glass fiber plate, the base plate, the outer-layer glass fiber plate and the puncture-proof panel are fixedly connected with the plate frame; protruding blocks are arranged on the inner side of the inner-layer glass fiber plate in an array mode. By means of the composite structure design, high strength, high rigidity and high puncture resistance of the partition plate are achieved. Meanwhile, the overall rigidity and puncture resistance of the partition plate are further enhanced through the design of the protruding blocks, and in addition, the chemical stability and wear resistance of the partition plate are guaranteed through material selection of the base plate and the puncture-proof face plate.

The puncture resistance test device comprises a supporting table, a supporting frame is mounted at the upper end of the supporting table, a mounting disc is rotationally connected to the inner side of the upper end of the supporting frame, and a hydraulic rod is mounted at the upper end of the mounting disc; a positioning plate is mounted at the upper end of the annular groove piece; a through groove structure is formed in the inner side of the positioning plate, a mounting plate is arranged on the upper side of the positioning plate, and a plurality of positioning needles are evenly fixed to the lower end of the mounting plate. The inner side of the mounting plate is provided with hole-shaped structures corresponding to spikes on the lower side of the puncturing mechanism. According to the puncture resistance test device provided by the invention, the puncture conditions with different densities can be simulated by arranging the positioning needles with different distribution densities, so that the puncture resistance of the fire protection clothing under different conditions can be comprehensively tested. In addition, an annular mounting groove piece in the device is matched with a filling groove, so that particulate matters can be filled in the testing process, the actual use environment is further simulated, and the testing authenticity is improved.

The invention relates to the field of power element detection, in particular to an intelligent detection device for a power cable, which comprises a base, a vertical frame and the like, the vertical frame is connected with a lifting assembly; the lifting assembly is provided with a translation assembly, and the translation assembly is provided with a clamping assembly used for clamping and fixing the two ends of a cable. The impact block freely falls to impact the cable, after the cable is impacted, the impacted part of the cable can be impacted on the pointed cone part of the conical block, the situation that the cable is placed on a rubble ground and smashed by an external stone and other objects is simulated, whether the sheath is damaged or not is tested, and therefore the impact resistance of the cable is tested while the impact resistance of the cable is tested. The puncture resistance test is synchronously carried out, the method is close to the actual use scene of the cable, and the test is more authentic.

This utility model belongs to the field of tire processing technology, specifically relating to a high-saturation buoyancy agricultural tire. It includes a bead, sidewall, and crown. The crown consists of tread blocks and tread grooves. The tread blocks are composed of symmetrical patterns of varying areas, with a tread saturation of 50%-52%; the tread depth is 15mm-28mm; the tread groove angle is 16°-20°, and the groove bottom curvature is 3mm-6mm; the longitudinal arc Rc of the tread blocks is 16mm-30mm, the transverse arc Rd=Rc-2mm, and the connecting reverse arc Re is 90mm-130mm. This utility model increases the contact area through high saturation, reducing ground pressure and allowing the tire to "float" on the ground, minimizing damage to grasslands. Combined with shallow depth, symmetrical distribution, and optimized groove design, it improves traction, self-cleaning properties, and wear and puncture resistance, making it suitable for agricultural operations such as lawns and grasslands where surface protection is required.

The utility model discloses a high sharpness injection needle, including needle tube and needle tip, the needle tip adopts three -stage tapering type multi -edge surface structure, and this three -stage tapering type multi -edge surface structure is composed of main cutting part, transition part and micro blade part, the main cutting part includes three symmetrical distribution's first inclined plane, and every first inclined plane bifurcates two second inclined planes to form transition part, and every second inclined plane bifurcates two third inclined planes to form micro blade part, the needle tip surface is equipped with a plurality of micro -groove, and the third inclined plane intersection of on micro blade part forms nanometer -class blade edge, and this blade edge edge is equipped with periodic micro sawtooth. The utility model discloses a needle tip is three -stage tapering type multi -edge surface structure, and the puncture resistance is reduced in stages, and the pain feeling is reduced, sets up micro sawtooth and can reduce the tissue contact area through " point cutting", and the local stress concentration when puncturing, and then delay passivation, sets up micro -groove and can guide the tissue fluid flow, destroys the negative pressure adsorption effect, and improves the needle insertion smoothness.

This invention provides a protective toeboard compression resistance testing device for work shoes, belonging to the field of toeboard testing. It includes: a worktable; and a striking assembly comprising a shaft, a cradle, and a striking hammer. Two side plates are fixedly mounted on the worktable, and the shaft rotatably connects to both side plates. The shaft also movably connects to the cradle, and the striking hammer is located at one end of the cradle. A driving assembly is provided on the worktable to drive the cradle to swing. This invention achieves multi-dimensional testing of toeboard impact resistance, multi-intensity puncture resistance, and lateral compression resistance, significantly improving testing efficiency and accuracy, and meeting the needs of evaluating the protective performance of work shoes under complex working conditions.

Recyclable, paper-based packaging structures and articles comprise extensible or semi-extensible paper layer with an anisotropy ratio in the range of 0.67 to 1.5 and a polymer extrusion coating layer. Methods for forming same are also provided. The structures and articles have a puncture resistance of 3 lbf or greater. Recyclable, paper-based packaging structures and articles and methods are formed using a polymer extrusion coating layer disposed on one side of an extensible or semi-extensible paper layer having an anisotropy ratio in the range of 0.67 to 1.5. A second polymer extrusion coating layer is disposed on a second side of the paper substrate layer. Advantageously, the paper substrates have a puncture resistance in the range of 3 lbf to 13.5 lbf.

The utility model provides a tire test bench, which relates to the technical field of tire puncture resistance testing and comprises a test bench, an inclined bench, a hydraulic cylinder, a translation turnover assembly, a cylinder, a through hole, a fixing assembly, a fixing frame, a puncture assembly and a spraying assembly. The device can automatically perform puncture operation on a tire body and spray water after puncture is finished to check and know the puncture resistance of the tire body, and different areas of the tire body can be replaced for puncture in the test process, so that the test area is more comprehensive, meanwhile, the ascending and descending of the tire do not need to be completed manually, and the test efficiency is improved. Therefore, the labor intensity is obviously reduced, and the anti-pricking performance testing process of the tire body is better.

The invention discloses a tire puncture resistance detection device, and relates to the technical field of tire testing. The tire puncture resistance detection device comprises a bottom plate, the upper side of the bottom plate is fixedly connected with a fixing frame, the outer side of the fixing frame is fixedly connected with a connecting plate, the left side of the connecting plate is fixedly connected with a connecting rod, the left end of the connecting rod is fixedly connected with a positioning disc, and the left side of the fixing frame is provided with a puncture unit. Two fixing blocks are fixedly connected to the upper side of the bottom plate, electric push rods are fixedly connected to the outer sides of the two fixing blocks, clamping blocks are fixedly connected to the outer ends of the electric push rods, and the puncture unit comprises a side plate. Through the arrangement of the bottom plate, the clamping block, the side plate, the hydraulic cylinder and the puncture needle, puncture testing can be conveniently conducted on the tire, through the lifting plate, the sliding block, the bottom block, the protective cover, the first inclined plate and the contact cover, double protection can be conveniently conducted on the splashing puncture needle through the contact cover and the protective cover, accidents are avoided, and the safety of the device is improved.

The application discloses a tire for all-terrain ATV, comprising a tire body, a tire tread of the tire body is composed of side grooves and middle grooves, the side grooves are composed of first block rings, the middle grooves comprise main grooves and main side grooves, the main side grooves are arranged on both sides of the main grooves, the main grooves are gear-shaped annular patterns connected head to tail, the main side grooves are composed of second block rings, equal intervals are formed between the side grooves and the main side grooves and between the main side grooves and the main grooves, first openings are formed at groove corners of the main grooves, and prismatic blocks are formed at the first openings, so that the tire has improved ground adhesion, especially excellent climbing ability, the prismatic blocks arranged at the first openings play a supporting role of the tire tread and the ground during driving, the tire has improved puncture resistance, and has certain aesthetic property.

The present application discloses a puncture needle device and a particle implanting device with the puncture needle device, which comprises a moving platform, a mounting seat, a resistance sensing module, a puncture needle, a lock body, a lock bolt and an elastic reset member, the moving platform is provided with a rotary driving mechanism and a dynamic torque sensor, the rotary driving mechanism is in transmission connection with one end of the dynamic torque sensor; the mounting seat is rotatably arranged on the moving platform and in transmission connection with the other end of the dynamic torque sensor, the mounting seat is movable in the front-back direction; the resistance sensing module is arranged on the moving platform, and the rear end of the mounting seat is abutted against the resistance sensing module. The arrangement of the lock body, the lock bolt and the elastic reset member enables the puncture needle and the mounting seat to be quickly installed and disassembled. The particle implanting device imitates the puncture operation of a doctor through the puncture needle device, the puncture needle is advanced and rotated in a twist manner, the puncture resistance is effectively reduced, and the puncture precision is improved.

The invention relates to a puncture-resistant flash medical protective sheet, which is characterized in that the raw material of the flash medical protective sheet comprises polyethylene, and the gram weight of the flash medical protective sheet is greater than 40g / m < 2 >; the penetration degree of the flash evaporation medical protective sheet is 0.3 to 3 (KN.s) / mm; the penetration degree is equal to puncture strength * ventilation resistance; the invention discloses a method for testing the puncture resistance of a plastic film and a thin sheet according to the puncture strength test standard GB / T 37841-2019. The test standard of the air permeability resistance is GBT 458-2008 measurement of the air permeability of paper and paperboards, and the air permeability resistance is used for measuring the time for passing 100 ml of air. The medical flash evaporation protective sheet has the advantages of better puncture resistance and air permeability.

The utility model provides a kind of puncture prevention barrier layer structure for battery aluminum plastic film, it is related to soft package battery field, and it includes: aluminum plastic film body, the inner wall of aluminum plastic film body is equipped with battery body, the aluminum plastic film body includes cast polypropylene film, aluminum foil layer, puncture prevention layer and nylon layer, the surface of puncture prevention layer is installed in the inner wall of nylon layer.The utility model, the material of puncture prevention layer is aramid fiber, it is coated on substrate to make aramid coating diaphragm, has very strong puncture resistance, the nylon layer installed on the surface of puncture prevention layer protects middle layer aluminum foil from scratching, with puncture resistance, the aluminum plastic film has stronger puncture resistance by combining puncture prevention layer and nylon layer, fixed shell is installed in the corner of aluminum plastic film body, screwing thread sleeve drives fastening rod one and fastening rod two to be rotated into the inner wall of screwing thread sleeve, so that adjacent two fixed shell move towards and be tightened, so that aluminum plastic film body can be better installed on the surface of battery body.

The utility model discloses a kind of puncture-proof reinforced butyl inner tube, it is related to butyl inner tube technical field, including inner tube main body, the outer side of inner tube main body is provided with puncture-proof mechanism, puncture-proof mechanism includes outer protective layer, buffer layer and air-tight layer, the outer surface of inner tube main body is fixedly connected with air valve, outer protective layer includes gradient fiber distribution layer, buffer layer includes microporous foamed adhesive layer.It can be through the intercoordination between gradient fiber distribution layer, three-dimensional netted fiber layer, honeycomb impact resistance layer, chopped carbon fiber layer and liquid butyl rubber layer, can effectively prevent sharp object puncture inner tube main body, enhance the applicability of the device, avoid vehicle in the process of road travel easily crush to various sharp objects, to easily cause damage to inner tube, need driver to stop and maintain tire, and the puncture resistance of inner tube is poor, easily cause inner tube maintenance frequency increase, lead to tire service life reduction reduces problem.

The application discloses a kind of puncture-resistant composite films, belong to composite film technical field, PA11, metallocene polyethylene, composite powder, nano aluminum powder and silane coupling agent KH560 are mixed after extrusion with double screw extruder, granulation, obtain intermediate layer masterbatch;Modified PA6 and PA6 are mixed after extrusion, granulation, obtain upper layer masterbatch;With PA11 as lower layer masterbatch, upper layer masterbatch, intermediate layer masterbatch and lower layer masterbatch are extruded into cast sheet by three-layer structure die at 220-230 DEG C;After cast sheet is treated by humidification, it is prepared into puncture-resistant composite film including upper layer, intermediate layer and lower layer by the way of two-way stretching;-NH- in PA11 can form hydrogen bond with hydroxyl in the surface modified cellulose of composite powder, play the role of physical crosslinking, help to improve the strength and puncture resistance of intermediate layer;Nano aluminum powder and metallocene polyethylene also help to improve the puncture resistance of composite film.

The utility model relates to the technical field of tire performance testing, in particular to a tire puncture resistance testing device, which comprises a bottom plate, four groups of support columns, a top plate, a plurality of rows of puncture mechanisms, a position adjusting mechanism, a moving mechanism, a lifting mechanism, a lifting plate and a mounting mechanism, and is characterized in that the four groups of support columns are connected with the top end of the bottom plate, and the top plate is connected with the top ends of the four groups of support columns; the position adjusting mechanism is installed at the bottom end of the top plate, the moving mechanism is installed at the bottom end of the position adjusting mechanism, the lifting mechanism is installed at the bottom end of the moving mechanism, and the lifting plate is connected with the bottom end of the lifting mechanism. The multiple rows of puncture mechanisms are arranged and mounted at the top end of the bottom plate, the multiple rows of puncture mechanisms are used for testing tires of different specifications and types, and each of the multiple rows of puncture mechanisms comprises a fixing plate and multiple groups of puncture needles. The utility model provides a tire puncture resistance testing device, and aims to solve the problems of inconvenience in operation, inaccurate testing result, poor universality and the like of a tire puncture resistance testing device in the prior art.

The present invention relates to an internal insert provided on the inner bottom of a shoe, and a manufacturing method therefor and, particularly, to an internal insert and a manufacturing method therefor, in which the internal insert has puncture resistance that enables the protection of the sole of the foot from sharp objects such as nails, while simultaneously maintaining a small thickness to have reduced volume and ensuring flexibility, thus enabling a reduction in shoe weight and an improvement in wearing comfort.

The utility model relates to the technical field of medical instruments, in particular to an edging structure for a CGM guide needle, which comprises an edge portion, the edge portion is provided with a first edge face and a second edge face, one end of the first edge face intersects with one end of the second edge face to form a cutting edge line, and the cutting edge line, the first edge face and the second edge face form an edge point. The cross section of the blade point is triangular and is used for reducing the puncture resistance of the blade part; a triangular surface is formed between the other end of the first blade surface and the other end of the second blade surface; the first cutting edge face, the second cutting edge face, the cutting edge point formed by the first cutting edge face and the second cutting edge face and the triangular face can effectively improve puncture efficiency and stability of the CGM guide needle in the using process, and a structural basis is provided for accurate implantation of a CGM sensor.

A plurality of upper barrier strips are arranged on the upper surface of a stab-resistant hard board, a plurality of lower barrier strips are arranged on the lower surface of the stab-resistant hard board, each upper barrier strip is respectively inserted between two adjacent wave troughs of an upper fixed corrugated board, each lower barrier strip is respectively inserted between two adjacent wave crests of a lower fixed corrugated board, and the upper barrier strips and the lower barrier strips are arranged on the upper surface of the stab-resistant hard board. A plurality of stab-resistant gaps are arranged between the upper fixed corrugated board and the stab-resistant hard board and between the lower fixed corrugated board and the stab-resistant hard board respectively, every two adjacent stab-resistant gaps are separated oppositely, each stab-resistant gap is filled with non-Newtonian fluid, the non-Newtonian fluid resists puncture of large impact force, and the stab-resistant hard board resists puncture of small impact force. Therefore, the puncture resistance of the composite paperboard is improved. The utility model further discloses a puncture-resistant carton which is made of the composite paperboard, so that the puncture resistance of the carton is improved, and the protectiveness is enhanced.

The polyurethane foaming vibration isolation pad with the waterproof layer comprises a protective layer, a vibration isolation layer and the waterproof layer, the protective layer is a fabric layer with a flexible interface formed by a woven structure, and the vibration isolation layer is a polyurethane foaming layer which is of a honeycomb structure and has the functions of absorbing vibration energy and buffering impact loads. The upper end face of the waterproof layer is of a wavy structure with wave crests and wave troughs, and the bottom face and the top face of the vibration isolation layer react with the upper end face of the waterproof layer and the bottom face of the protective layer to form an integrated structure without interface layering. The protective layer, the vibration isolation layer and the waterproof layer are combined into a whole to form the vibration isolation pad, the vibration isolation pad has the functions of wear resistance, puncture resistance, vibration absorption and water resistance, the performance limitation of a single material is broken through, the construction procedures are reduced, the construction period is shortened, the construction efficiency is improved, and the vibration isolation pad is suitable for various track foundations, building foundations, precise instrument bases and the like. The modular design supports rapid laying, and the cost is reduced.

The invention discloses a stainless steel pipe with tissue low-resistance puncture and self-lubricating functions and a machining method, and relates to the field of medical instruments. Comprising a pipe base body, a bionic microstructure tip is arranged at the puncture end of the pipe base body, and an in-situ activation lubricating layer is arranged on the outer surface of the pipe base body; the bionic microstructure tip comprises a first-stage skin breaking area and a second-stage expanding area which are sequentially arranged in the puncture direction. The first-stage skin breaking area is a nanoscale sharp cutting edge; the second-stage expansion area is a spiral or stepped micro-groove array arranged on the outer surface of the pipe; the in-situ activation lubricating layer is a hydrophilic polymer composite gel coating which can be rapidly hydrated when encountering tissue fluid or blood. The method has the advantages that puncture resistance is remarkably reduced, tissue damage is reduced, instant self-lubrication is achieved, and the coating is stable and controllable.

The utility model relates to the field of packaging bag detection, and discloses a packaging bag anti-puncture detection device, which comprises a case, a detection mechanism, a detection mechanism, a detection mechanism and a detection mechanism, the detection mechanism comprises a power motor, a disc, a placing plate, a connecting frame, a sliding plate, a magnet, a pressing plate, a side plate, a spring, a vertical rod and an electromagnet; the power motor is fixedly installed on the inner wall of the top of the machine box, the output end of the power motor is fixedly connected with the disc, the containing plate is fixedly installed at the top end of the disc, the connecting frame is fixedly installed at the top of the containing plate, the sliding plate is vertically installed on the connecting frame in a sliding mode, and the magnet and the pressing plate are both fixedly connected with the sliding plate. The side face of the side plate is fixedly connected with the sliding plate, the spring is fixedly installed between the side plate and the connecting frame, and the bottom end of the vertical rod is fixedly connected with the electromagnet. The packaging bag detection device has the following advantages and effects that the packaging bag to be detected is rapidly detected, the use is relatively convenient, and the detection efficiency is effectively improved.

The present invention discloses an auxiliary device for testing the puncture resistance of polyolefin films, specifically in the field of polyolefin films, comprising a test base, an extension plate fixedly connected to one side of the test base, a storage slot provided at the top of the extension plate, a curved plate fixedly connected to the top and left and right sides of the storage slot, a curved surface a provided on one side of the upper surface of the curved plate, and two limit posts symmetrically distributed on the left and right sides of the top of the extension plate. The present invention provides a curved plate, a curved surface a, an arc-shaped curved plate, and a curved surface b, and utilizes the curved surfaces a and b to fully unfold and press the edges and corners of the polyolefin film, thereby avoiding the problem of shrinkage or damage of the polyolefin film caused by existing clamp fixing methods or fixing methods squeezed by heavy objects. The polyolefin film is fully unfolded by the curved surfaces a and b, so that when a needle punctures the polyolefin film, the force is evenly applied to all parts of its surface, thereby ensuring the accuracy of the data measured after the puncture.