171 results about "Surface friction" patented technology

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

The invention discloses a constant-tension self-compensation coating method and an intelligent deviation adjusting method, and belongs to the technical field of material dynamic characteristic on-line testing and cooperative control, and the constant-tension self-compensation coating method comprises the following steps: obtaining stress distribution data of the surface of a coating base material, generating a multi-mode optical data set, analyzing a real-time tension estimated value and material dynamic characteristic parameters, and obtaining a multi-mode optical data set; wherein the dynamic characteristic parameters of the material comprise an equivalent elastic modulus and a surface friction coefficient; generating a dynamic coupling coefficient based on the real-time tension estimation value and the dynamic characteristic parameters of the material, performing analysis and calculation, and outputting a tension compensation control quantity and a deviation adjustment control quantity; and the tension compensation control quantity is executed to adjust the unwinding or winding torque, and meanwhile, the deviation adjusting control quantity is executed to adjust the angle of a deviation correcting guide roller. According to the method, the dynamic characteristics of the material are analyzed in real time by adopting multi-mode optical perception, and the tension deviation coupling model is constructed, so that interference advanced cooperative inhibition and working condition self-adaptive stable coating can be realized.

The invention discloses a hydraulic fracturing ground stress testing device and method, and relates to the technical field of hydraulic fracturing, and the hydraulic fracturing ground stress testing device comprises testing equipment. According to the hydraulic fracturing ground stress testing device and testing method, through the design of testing equipment, a water source enters the water pump pipe from the water inlet pipe, water flow is sprayed outwards from the nozzle in the water pump pipe, so that the hydraulic fracturing effect is achieved, the rotating mechanism is driven to rotate through flowing of the water flow, and the effect of cleaning the inner wall of a pipeline through friction is achieved; the rubber pipe is extruded by sliding the packing top block on the packing base, so that the rubber pipe is extruded and deformed to be attached to the surface of soil, the packing effect on a test part is achieved, the silica gel column is arranged in the rubber pipe, the silica gel column has a certain supporting effect and prevents a part from being concaved inwards and collapsed, and the rhombic film is arranged on the outer side of the rubber pipe, so that the rubber pipe is prevented from falling off. Therefore, surface friction force of components is increased, service life of the components is prolonged, and friction load is dispersed.

The utility model provides a seismic mitigation and isolation building support which comprises an upper support, a plane stainless steel plate, a plane wear-resisting plate, a spherical crown and a lower support assembly, the upper support is connected with the upper portion of a bridge structure, and the lower support assembly is connected with the lower portion of the bridge structure or a foundation part; the planar stainless steel plate is arranged on the upper support, the planar wear-resisting plate is arranged on the upper surface of the spherical crown, and the planar stainless steel plate and the planar wear-resisting plate are fixedly connected or can be slidably connected in at least one preset direction, so that the requirements of different application scenes are met, and the application range is wide; the curved surface of the spherical crown is in sliding connection with the lower support assembly. The combination of the upper support, the plane stainless steel plate, the plane wear-resisting plate, the spherical crown and the lower support assembly is adopted, compared with a traditional complex curved surface friction pair design, the whole structure is simple, the design is reasonable, the manufacturing and installing difficulty and the fault risk caused by the complex structure are reduced, the stability and reliability of the building support are improved, and the service life of the building support is prolonged.

The utility model discloses a bridge cylindrical surface tension and compression support which comprises an upper support assembly, a cylindrical surface assembly, a piston assembly, a middle support assembly and a lower support assembly. The piston assembly comprises a piston, a large circular groove is formed in the bottom of the piston, and a rubber plate is embedded in the large circular groove; the middle support assembly comprises a middle lining plate, and the top of the middle lining plate is also arranged in the large circular groove in the bottom of the piston; a sealing ring is further arranged between the rubber plate and the middle lining plate, and the rubber plate is sleeved with the sealing ring. The cylindrical surface friction pair and the rubber plate are adopted in the upper structure and the lower structure of the support respectively to meet different rotating deformation requirements of a bridge in the longitudinal bridge direction and the transverse bridge direction, meanwhile, the L-shaped guide rails are arranged in the longitudinal bridge direction and the transverse bridge direction respectively to transmit vertical drawing force of the structure, the stress and deformation functions of the support structure are clear, and later inspection and maintenance are facilitated.

This invention relates to an embossing and conveying device for inner lining paper, comprising an embossing roller, which includes an embossing roller body and a rubber ring layer fitted onto the embossing roller body. The width of the rubber ring layer matches the width of the inner lining paper. This technical solution effectively avoids leaving a dent of similar width to the inner lining paper due to friction on the surface of the embossing roller layer of the rubber layer during the inner lining paper's movement, and also avoids the rubber layer around the dent scratching the inner lining paper. This extends the service life of the rubber embossing roller. It significantly improves the service life of the device, reduces the probability of poor inner lining paper conveying due to wear during production, reduces the risk of quality defects such as poor folding of the inner lining paper, and improves production efficiency.

The present invention discloses a method and device for detecting the charge state of an insulating surface. The method comprises: establishing a wind tunnel simulation test platform for simulating the charge state of an insulating surface of a blade when rotating at high speed; based on the established wind tunnel simulation test platform, setting different test times, wind speeds, and angles between the insulating surface and the oncoming airflow for testing, and obtaining the charge states of the insulating surface formed under different test times, wind speeds, and angles between the insulating surface and the airflow; establishing an insulating surface charge distribution measurement system, and measuring the potential distribution of the charge states of the insulating surface formed under different test times, wind speeds, and angles between the insulating surface and the airflow, and obtaining different measurement results; and performing comparative analysis based on the different measurement results to obtain the influence of time, wind speed, and the angle between the insulating surface and the airflow on the frictional charging of the insulating surface.

The invention belongs to the technical field of high-performance aluminum alloy surface functional coatings, and discloses an aluminum alloy composite wear-resistant coating and a preparation method thereof.The method comprises the steps that the surface of an aluminum alloy matrix is pretreated, so that the surface is clean and dry; through a laser-assisted cold spraying method, dry aluminum alloy powder is sprayed on the surface of the pretreated aluminum alloy matrix, and a laser-assisted cold spraying coating is formed on the surface of the aluminum alloy matrix; a laser-assisted cold spraying coating is polished, cleaned and dried, then micro-arc oxidation treatment is carried out, an Al2O3-based ceramic wear-resistant coating is formed on the surface layer of the laser-assisted cold spraying coating, then cleaning and drying are carried out, and the aluminum alloy composite wear-resistant coating is prepared on the surface of an aluminum alloy matrix. Through the synergistic effect of the two technologies of laser-assisted cold spraying and micro-arc oxidation, the surface friction performance of the aluminum alloy is remarkably improved, and the high requirements of the fields of mechanical manufacturing, aerospace and the like for the wear resistance of aluminum alloy components are met.

The utility model discloses a BOPP (biaxially-oriented polypropylene) unwinding device, which belongs to the technical field of film unwinding devices and comprises a base, a distance adjusting mounting frame arranged on the upper end face of the base, a movable frame slidably mounted on the distance adjusting mounting frame, a conical pressing part used for being inserted into two ends of a paper tube of a BOPP film roll for clamping and fixing, and an anti-loosening pressing part mounted on the movable frame and used for providing rotation damping. According to the technical scheme, the distance between the movable frames is adjusted through the distance adjusting mounting frame, then the distance between the conical pressing pieces is adjusted, the conical pressing pieces are inserted into the two ends of a film roll paper tube, then clamping force is applied to achieve the fixing effect, and film rolls of different lengths and different calibers can be fixed; the anti-loosening pressing piece is in friction contact with the surface of the film roll, certain damping force is provided, and it is guaranteed that when unwinding is stopped, the BOPP film roll cannot continue to be unwound due to inertia rotation.

The utility model discloses a lifting hook, and relates to the technical field of lifting hooks, the lifting hook comprises a lifting ring connected with a lifting device, the lifting ring is provided with a lifting hook, and an anti-falling plate is rotatably arranged at an opening of the lifting hook; the lifting hook is fixedly sleeved with an elastic sleeve for hanging a lifting rope, and limiting baffles are arranged at the positions, located at the two ends of the elastic sleeve, of the lifting hook; the anti-falling plate is rotationally arranged at the opening of the lifting hook and can be automatically closed after the lifting rope is hung, so that the lifting rope is prevented from accidentally separating from the lifting hook; the elastic sleeve can increase the friction force between the elastic sleeve and the lifting rope and is matched with the limiting baffles at the two ends of the elastic sleeve, transverse displacement of the lifting rope caused by shaking of the heavy object is limited from the contact surface friction layer and the physical blocking layer, the lifting stability of the heavy object is effectively improved, the unhooking risk is reduced, and the safety of lifting operation is guaranteed.

The invention relates to the technical field of heating pads, in particular to a production method of a heating pad and the heating pad, and the heating pad comprises a surface layer, a heating sheet, a bonding bottom layer and release paper which are sequentially stacked from top to bottom; anti-slip lines are formed on the upper surface of the surface layer, a bonding surface is constructed on the lower surface of the bonding bottom layer, and the release paper is adhered to the lower part of the bonding surface; wherein the heating piece is electrically connected with the control switch, the control switch is electrically connected with the power source, and through the unique layered composite structure, collaborative improvement of multiple technical advantages is achieved; firstly, an integrated compact surface layer is formed after the polyurethane layer is cured, so that the surface of the heating pad is endowed with excellent waterproof performance, the heating pad can effectively resist liquid erosion, and meanwhile, the structural stability and safety of the product at a relatively high heating temperature are ensured by the material characteristics of the heating pad; and secondly, the surface of the surface layer is integrally formed with the anti-skid lines, so that the surface friction coefficient is obviously increased.

The invention belongs to the technical field of geotechnical engineering testing, and particularly relates to a geotechnical bag interlayer contact surface friction angle in-situ testing method which comprises the following steps: forming geotechnical bag interlayer friction surfaces between geotechnical bags; acquiring point cloud data of the interlayer friction surface of the geotechnical bag; obtaining a three-dimensional roughness parameter according to the point cloud data; and obtaining the interlayer contact surface friction angle according to the function relationship among the interlayer contact surface friction angle, the three-dimensional roughness parameter and the friction coefficient of the woven bag. Friction angle parameters can be directly obtained on an engineering site, and the defects that traditional indoor test equipment is large in size, complex in operation, long in consumed time, high in cost and difficult to meet site conditions are overcome. Through the combination of compression loading, laser scanning and roughness parameter calculation, the method is simple and convenient in test step and high in efficiency, can quickly obtain an accurate friction angle value under various load conditions, provides a reliable basis for slope reinforcement design and stability analysis, and has remarkable practical value and popularization prospect.

The invention relates to a back coating film, a protective film applying the back coating film and a preparation method, the back coating film comprises a two-layer structure of a bottom layer and a surface layer, the bottom layer adopts a reaction type slipping agent, the surface layer adopts a non-reaction type slipping agent, and after the protective film is formed after a base material is formed into a film, the bottom layer and the surface layer both form a structure with the friction coefficient gradually increased from inside to outside. The friction coefficient of the surface layer is higher than that of the bottom layer. On the premise of not increasing the total dosage of the slipping agent for the back coating film, the surface friction coefficient of the back coating film is further reduced, and the damage to the bonding performance of the back coating film and a base material is avoided. The protective film is convenient to wind and unwind in the high-speed production process, and the film surface performance of the protective film is not damaged.

The invention discloses a preparation method of a fine structure surface RB-SiC friction pair based on throttling expansion self-suction type multiphase jet flow, and aims to solve the technical problems of poor uniformity and easy generation of microcracks in fine machining of an RB-SiC material. According to the method, negative pressure is formed through the throttling expansion effect generated when micron diamond gas jet flows through a Laval nozzle, nano diamond slurry with the shear thinning characteristic is automatically sucked in, and cell type diamond cluster abrasive multiphase jet is formed through online mixing; when the surface of a workpiece is impacted, grinding material clusters are depolymerized, uniform fragile region erosion of the material is achieved through the micron diamond, flexible finishing is conducted by means of ploughing and micro-cutting effects of the nano diamond, and therefore generation of micro cracks is synergistically inhibited. And in combination with a mask plate technology, the preparation of the high-quality fine structure surface is finally realized. Through the synergistic effect of multi-phase jet flow online mixing and cell type grinding materials, the quality of the machined surface is remarkably improved, and the method is suitable for preparing the high-performance RB-SiC friction pair.

The application relates to a preparation method for reducing the surface friction of single crystal diamond and application, and the preparation method comprises the following steps: step one, determining a predetermined working environment of a single crystal diamond base material; step two, determining a surface energy regulation direction according to the predetermined working environment; when the predetermined working environment is a gas phase environment, the regulation direction is to reduce the surface energy, or when the predetermined working environment is a liquid phase environment, the regulation direction is to increase the surface energy; step three, according to the regulation direction determined in step two, selecting a corresponding surface energy regulation method to modify the friction working surface of the single crystal diamond. The preparation method is combined with the design of the surface energy directional regulation of the single crystal diamond crystal face intrinsic friction characteristic ordering rule, can effectively inhibit the friction failure of micro components, and prolongs the service life of a device.

The invention relates to the technical field of RPET manufacturing, and discloses an RPET manufacturing device and a method thereof.The RPET manufacturing device comprises a pelletizing assembly and an operation table, a supporting plate is fixed to the top of the operation table, a hobbing cutter is arranged on the supporting plate, and an upper feeding roller and a lower feeding roller are arranged on one side of the hobbing cutter; and the auxiliary assembly is arranged at the top of the operation table and comprises an adjusting piece, the adjusting piece comprises a rotating shaft fixed to one side of the lower feeding roller, a movable block is rotationally connected to the outer side of the rotating shaft, a connecting block is fixed to one side of the movable block, and a threaded column is rotationally connected to the top of the operation table. The grain cutting device has the beneficial effects that in the grain cutting process, when the feeding speed of the feeding roller to a wire material is too high or too low, the feeding speed of the feeding roller can be adaptively reduced or increased through the auxiliary assembly, after adjustment, the surface of the feeding roller can be cleaned, and after the friction force of the surface of the cleaned feeding roller is stable, the normal feeding speed can be recovered.

The application discloses an underwater adsorption anchoring device and method based on surface friction limiting. A limiting adjustment component is fixedly installed on a suction cup component, and an anchoring component is connected between the limiting adjustment component. A centrifugal impeller is arranged in the suction cup component, and the centrifugal impeller rotates under the drive of a motor, so that a flow field is formed in water, and then adsorption to a wall surface to be adsorbed is realized through the flow field in water. The anchoring component drills into the wall surface to be adsorbed, and adsorption between the underwater adsorption anchoring device and the wall surface to be adsorbed is realized through lateral friction between the anchoring component and the wall surface to be adsorbed. The anchoring component is used for drilling and milling a surface to form a conical pit, so as to provide tangential limiting friction. In the limiting adjustment structure, a rotating locking mechanism is used for changing and keeping the drilling direction of a grinding head, and a Y-shaped mounting frame realizes simultaneous feeding of three groups of grinding heads. The application has the functions of adsorption and anchoring limiting on the plane and spherical surface of underwater concrete or metal structures, and can adapt to various surface working environments.

The utility model relates to buffering structure technical field discloses a kind of buffer block, open and close lid structure and container. Buffer block includes: strong buffering section;Weak buffering section, is connected and set in the upper end of strong buffering section;In the opening lid stroke, strong buffering section and weak buffering section can be in preset order and mating surface friction contact, the resultant moment of buffering moment of buffer block, elastic moment of elastic member and gravitational moment of lid body in different stages of opening lid can always keep enough slow change trend, utilize the cooperation of strong buffering section and weak buffering section, provide and actual demand matched friction buffering force, guarantee that opening lid speed can maintain steady state in the whole stroke of opening lid, prevent container from being bounced or dumped by larger impact.

The invention provides a method for predicting the friction performance of a titanium alloy surface coating based on image features. The method comprises the following steps: preparing an electroplating solution; the Ti6Al7Nb titanium substrate is subjected to pretreatment; a titanium substrate is used as a cathode, a copper rod is used as an anode, and the copper and nano-hydroxyapatite composite coating is obtained through a jet electrodeposition process; collecting a coating surface image, and obtaining a coating surface friction coefficient through a friction test; extracting image features and carrying out normalization processing on test data; obtaining the most significant factors influencing the friction coefficient of the coating according to a grey correlation analysis method; and establishing a prediction model of the average friction coefficient with respect to image features based on a multiple regression algorithm, and performing reliability analysis. According to the method, the surface friction coefficient can be effectively predicted through the surface image features on the premise that the integrity of the titanium alloy coating is not damaged.

A composition for reducing surface friction or static friction is disclosed. The composition comprises at least one organosilane, at least one organophosphorus, or a combination of at least one organosilane and at least one organophosphorus. The composition further comprises at least one polymer. A method of applying the composition to a surface is also disclosed. Non-limiting examples of surfaces to which the composition may be applied include metal, metal alloy, metal oxide, glass, ceramic, or plastic substrates and combinations thereof. Also disclosed is an article comprising at least one surface that has been treated with the composition. Non-limiting examples of such articles include windows, watches and straps, screens, monitors, high frequency contact surfaces, electronics, housings for electronic devices, and combinations thereof. Such articles may also exhibit enhanced hydrophobicity and / or preservative properties compared to untreated articles.

Hinge for pivoting connection of a temple and a frame in a spectacle frame, comprising: - a first part having an upper flange and a lower flange, a first hole in the upper flange providing a tight fit for a head of a locking pin, a recess in the lower flange providing a housing for a cylindrical body of the locking pin; - a second part having a second hole, the second hole having a higher surface roughness than the cylindrical body of the locking pin, whereby the surface friction between the bushing and the second hole is higher than the surface friction between the bushing and the locking pin; - a bushing having an inner hole; - a locking pin having a head and a cylindrical body. The second part with the bushing is inserted between the upper flange and the lower flange of the first part. The locking pin is inserted through the first hole and the inner hole of the bushing and accommodated in the recess. Thereby the first part and the locking pin are pivotally connected to the second part and the bushing.

The utility model relates to the technical field of carton production, and discloses a paperboard feeding and conveying device for carton production, which comprises a mounting rack, a conveying mechanism arranged in the middle of the rack, baffles arranged on the front side and the rear side of the rack, and deviation rectifying mechanisms arranged at the bottoms of the inner sides of the baffles. In the conveying mechanism, an output shaft of a second motor drives a second belt wheel, a first belt wheel on a second rotating rod rotates through belt transmission, and the second rotating rod is driven. Power teeth at two ends and driven teeth at two ends of the first rotating rod are in transmission connection with a conveyor belt to guarantee stable power transmission. The conveying belt is made of a rubber material, is good in flexibility and smoothness, reduces friction to the surface of the paperboard, avoids scratch abrasion caused by scraping, is moderate in friction force, ensures that the paperboard moves stably and is not damaged, and improves the appearance quality and the product grade of paperboard conveying. In addition, the conveying structure guarantees stable operation of the conveying belt, stable feeding is conducted for follow-up machining, and the carton production quality and efficiency are improved.

The application discloses a kind of wind tunnel model surface friction stress global measurement method, the purpose is to friction stress global measurement, using coating heating mode to heat model surface, after reaching thermal equilibrium, the temperature distribution of model surface is obtained using high-precision infrared thermal imager, at specified position, using mature friction stress local measurement technology to obtain local friction stress, based on the friction stress and temperature distribution along streamline, the friction stress on the whole streamline is calculated;Using mature local friction stress measurement method and high-precision infrared thermal imaging technology to measure global friction stress, the measuring equipment is relatively simple, the model surface is heated by heating coating with constant power, the relationship between friction stress size and local temperature is established, the calculation method is relatively simple, the resolution of friction stress is higher, and the resolution of infrared image is equivalent, other flow field information can be obtained simultaneously.

The utility model provides a nanorod pin type sand mill capable of preventing screening blockage, which relates to the technical field of nanorod pin type sand mills and comprises a base and a transmission belt, the top of the base is fixedly connected with a mounting plate, and a grinding barrel is arranged on the rear surface of the mounting plate. When the superfine grinding machine is used, materials to be ground and the grinding balls are put into the sealed grinding barrel together, the motor drives the mounting column to rotate at a high speed, and the plurality of fixing rods fixedly arranged on the surface of the mounting column continuously drive the plurality of grinding balls to collide with one another disorderly, so that the materials are subjected to superfine grinding; when a material flows to one side of the grinding barrel through a plurality of fine holes in the surface of the sieve plate, the mounting disc fixed on the mounting column synchronously drives the plurality of scrapers to rub on the outer surface of the sieve plate, so that a film on the surface of the sieve plate is scraped off from the surface, and the sticky liquid material is prevented from being condensed into a layer of film on the surface of a screen mesh; the separation speed of the paint slurry is influenced, and the material separation speed of the sieve plate is greatly improved.

The utility model discloses a welded pipe with friction embossing on the outer surface, an outer welded pipe is sleeved on the outer side of an inner welded pipe to be welded and fixed, a plurality of circles of friction embossing belts are processed on the outer side pipe surface of the outer welded pipe, and the plurality of circles of friction embossing belts are mutually separated and transversely arranged on the outer welded pipe. A plurality of protruding friction stripes are arranged on the single-circle friction embossing belt, the friction stripes surround the outer side pipe face of the outer welding pipe, the friction stripes are separated from one another, the separation portions are concave pressing groove bodies, and pressing protruding stripes are further arranged on the outer surfaces of the friction stripes. By means of the mode, the friction textures can be arranged on the outer side of the welded pipe to improve the friction degree of the surface of the welded pipe, the welded pipe is used for the fields of welded pipe clamping, protection, stacking and the like, and the welded pipe is formed by sleeving and welding the inner and outer welded pipes and is good in protection performance. Friction stripes arranged in an array mode are arranged on the outer side of the outer welding pipe and provided with pressing protruding lines to improve the friction capacity, and the friction degree is greatly improved due to the fact that the arrangement directions of the friction stripes and the pressing protruding lines are different.

The present invention discloses a method for predicting micro- and nano-scale friction and wear. The method comprises: establishing a finite element model, wherein the finite element model is a friction and wear model consisting of a substrate and a sliding body, wherein the sliding body is in sliding contact with the top surface of the substrate; setting boundary conditions for the finite element model, fixing the degrees of freedom of the bottom edge of the substrate, controlling the contact and sliding process between the sliding body and the substrate using displacement, and adding an adhesion force field between the sliding body and the substrate; performing calculations using finite element software according to a set step size, determining the adhesion force based on the relative spacing between the sliding body and the substrate, determining the stress state of the friction and wear region on the substrate surface based on the adhesion force, and calculating the wear amount of the contact region in the current analysis step based on the stress state; and looping through step three until the calculation is complete. The above-described prediction method achieves wear prediction at the micro- and nano-scale, resolving the problem of existing finite element simulation methods that lack consideration of wear due to adhesion.

The invention belongs to the technical field of aeronautical part manufacturing, and relates to a manufacturing device and method for an aeronautical clamping ring. The wire feeding part is used for conveying rectangular steel wires, the production efficiency is improved, and manual operation errors are reduced. The sliding groove provides a stable guide forming channel for the rectangular steel wire, the contact face of the wide face of the rectangular steel wire and the support base is increased, and the problem of wide face friction caused by steel wire inclination in a traditional process is solved. And the rectangular steel wire is bent and formed by applying pressure to the rectangular steel wire through the mandrel. And the mandrel is rotationally connected with the bracket base, so that the mandrel is in sliding contact with the rectangular steel wire, the contact friction force is reduced, and the problem of extrusion deformation of the raw material steel wire is effectively reduced. The linear position adjusting part is used for adjusting the position of the support base in the first direction, and the forming radius of the clamping ring can be adjusted. And the discharge port mandrel is positioned between the wire feeding part and the bracket base. And the discharge port is used for limiting a steel wire output path and is matched with the mandrel to bend and form the rectangular steel wire.

The utility model discloses a rolling shaft and a slide, and belongs to the technical field of recreation facilities, the rolling shaft comprises a shaft assembly, a nylon sleeve is sleeved on the arc-shaped outline of the shaft assembly, a first gap is arranged between the nylon sleeve and the shaft assembly, the first gap is used for lubricating rotation and friction deceleration, and a pipe assembly is sleeved on the arc-shaped outline of the nylon sleeve. The sliding ladder comprises a sliding ladder side plate, and a plurality of rolling shafts which are arrayed at equal intervals are connected to the sliding ladder side plate. The nylon sleeve is in friction with the surface of the shaft assembly, rotation is achieved instead of a traditional bearing, the manufacturing cost is effectively reduced, the uncontrollable speed caused by too fast rotation is effectively reduced, the risk of uncontrollable speed during playing of children is reduced, and meanwhile the situation that the children are scalded due to the fact that the surface is too hot is avoided.

The present application relates to the field of extinction film, in particular to a kind of antiskid extinction film and preparation method thereof, to solve the poor antiskid performance of existing extinction film, easily leading to packaging sliding, unstable stacking problem;The antiskid extinction film is composed of four-layer structure that anti-adhesion layer, support layer, connecting layer and extinction layer are sequentially stacked and co-extruded;The preparation method uses modified polypropylene, composite modified antiskid particle as modified raw material to modify the extinction layer of the lowermost layer of antiskid extinction film, uses modified polypropylene to improve the adhesion and flexibility of antiskid extinction film, uses composite modified antiskid particle to build composite rough structure, significantly increases the surface friction coefficient under the synergistic effect of the two, so as to give the excellent antiskid performance of antiskid extinction film, which can effectively prevent packaging sliding, stacking collapse.

The invention discloses an anti-slip embossed TPE (thermoplastic elastomer) tension piece structure and a preparation process, and relates to the technical field of thermoplastic elastomer processing, the anti-slip embossed TPE tension piece structure comprises a base layer and an embossed layer, the base layer is made of a matte dry and comfortable high-elastic TPE (Thermoplastic Elastomer) material; the embossed layer is of a texture structure formed on the surface of the base layer in a pressing mode through an embossing roller machine, the texture type is selected from at least one of grid grains, leather grains, wood grains, dot grains, wire drawing grains, frosted grains and anti-carbon fiber grains, the texture depth ranges from 0.1 mm to 0.3 mm, and the texture interval ranges from 0.5 mm to 2 mm. The surface friction force of the tension piece is increased through the texture structure of the embossed layer, the tension piece is not prone to slipping in the use process, stable holding can be kept even if the hand sweats, and the problem that a traditional smooth surface TPE tension piece is poor in skid resistance is solved.