213 results about "Foam rubber" patented technology

The invention relates to a composite electromagnetic shielding structure for a power terminal and a preparation method thereof, the structure comprises an accommodating shell, the accommodating shell is formed by connecting a plurality of composite electromagnetic shielding plates, and each composite electromagnetic shielding plate comprises an inner surface shielding layer and an outer surface shielding layer which are attached to each other; a heat conduction layer is arranged between the inner surface shielding layer and the outer surface shielding layer, and the inner surface shielding layer is located in the accommodating shell; a protective layer is arranged on the outer layer of the outer surface shielding layer and comprises an insulating layer and a waterproof layer, and the waterproof layer is located on the outer layer of the insulating layer; the outer surface shielding layer is made of a low-frequency electromagnetic field shielding material formed by mixing amorphous magnetic alloy powder, magnetic fibers and nickel powder; and the inner surface shielding layer is made of a high-frequency electromagnetic shielding material formed by mixing silicon carbide and resin foam rubber fibers. The structure can cope with various electromagnetic interference environments, provides electromagnetic shielding protection, and also has better electromagnetic shielding effectiveness for electromagnetic interference of different frequency bands.

The invention discloses a foamed rubber soft magnetic material and a preparation method, and belongs to the technical field of magnetic composites.The foamed rubber soft magnetic material comprises a rubber base material, air holes and magnetic powder, the air holes are distributed in the rubber base material, and the magnetic powder is distributed in the rubber base material or the air holes; the elastic modulus of the rubber soft magnetic material is smaller than or equal to 5 MPa, the maximum magnetic energy product of the rubber soft magnetic material is larger than or equal to 1 MGOe, the tensile strength of the rubber soft magnetic material is larger than or equal to 4 MPa, and the density of the rubber soft magnetic material is smaller than or equal to 2.0 g / cm < 3 >. By preparing and adding the spherical magnetic powder particles, the performance index of the foamed rubber soft magnetic material can be further improved, the foamed rubber soft magnetic material solves the problem that magnetic damping rubber is low in magnetic performance, the damping effect of a product is remarkably improved, and the foamed rubber soft magnetic material is lighter and thinner and convenient to use and popularize.

The invention discloses production equipment and a production method of foam rubber. The production equipment of the foam rubber comprises a bottom frame, a supporting rod, a base plate, a vertical frame and a rubber coating mechanism, the gluing mechanism is optimally arranged, under the action of an air cylinder, a support drives a sliding sleeve to move on the surface of a sliding rod, so that a pressing assembly is close to and tightly pressed above a foam rubber strip for limiting and guiding, then a glue solution is sucked through a liquid suction pump, passes through a glue outlet pipe and a corrugated pipe and then is sprayed out from a gluing head to be coated above the foam rubber strip, and the foam rubber strip is coated with the glue solution. After the glue solution is coated, a wavy curve shallow groove is marked on the glue solution through the groove scraping assembly, the glue solution is scraped inwards to form oblique angles at the edges of the two sides of the foam adhesive tape through the leveling assembly, the upper portion of the foam adhesive tape is leveled, the glue solution is prevented from being extruded out from the edges after being attached and extruded, the attaching effect is guaranteed, bubbles are prevented from being generated in the attaching process, and the service life of the glue solution is prolonged. And the processing quality of the product is improved to a certain extent.

The invention discloses anti-shrinkage directional conductive supercritical foaming rubber and a preparation method thereof, and relates to the technical field of conductive rubber foam, raw materials comprise a rubber matrix, a modified fiber forming polymer and an auxiliary agent system, and the modified fiber forming polymer is prepared from a fiber forming polymer and a conductive filler. The preparation method comprises the following steps: extruding and granulating the fiber-forming polymer and the conductive filler to obtain modified granules, blending the modified fiber-forming polymer granules and the rubber matrix, carrying out extrusion and traction processes to obtain an in-situ fiber-forming modified rubber material, carrying out directional open milling, adding an auxiliary agent system, carrying out vulcanization molding, and foaming in a supercritical fluid to obtain the rubber foam material. The directional conductive fiber is constructed in the rubber matrix in situ, the rubber foaming material with directional conductivity and shrinkage resistance is prepared, the conductive efficiency is high, the problem that a rubber supercritical foaming material is prone to shrinkage is solved, and the rubber foaming material has the characteristics of heat insulation, light weight, high strength and the like and can be used for buffering and damping, heat insulation, electromagnetic shielding, flexible sensing and other scenes.

The utility model relates to an infilled wall and outer wall glass joint filling structure, and belongs to the technical field of building construction. The window mainly comprises an outer wall window, an inner partition wall, rectangular pipes, square pipes and silica gel strips, the rectangular pipes are fixedly connected with a window frame of the outer wall window, the square pipes are installed at the two ends of one side of the inner partition wall of each rectangular pipe, the square pipes and the inner partition wall are plugged through the silica gel strips, and the inner partition wall, the rectangular pipes, the square pipes and the silica gel strips are filled with foam glue. The two sides of the inner partition wall, the rectangular pipes, the square pipes and the silica gel strips are coated with fireproof coatings, and good fireproof performance is achieved. The rectangular pipe is fixed to the outer wall window, the foam rubber filling layer is supported and limited through the square pipe, the space between the square pipe and the inner partition wall is blocked through the silica gel strip, the silica gel strip can meet the deformation requirements of thermal expansion, ductility and the like, the blocking effect is good, and the good sound insulation, light insulation, fire prevention and smoke prevention effects are achieved.

The invention discloses a noise-reducing anti-skid asphalt composition and a preparation method thereof, and relates to the field of material science and engineering. The granite is used as fine aggregate, the surface of the granite is modified, the granite shows macroscopic textures through high temperature, skid resistance is achieved, meanwhile, mineral gradually exposes hydroxyl groups, the hydroxyl groups and sulfonated substances form sulfonic acid groups, and then the mineral is coated with a rubber material, so that the anti-skid performance of the granite is improved. A polar group in the rubber material reacts with a sulfonic acid group on the surface of aggregate, so that the long-term effect of a matrix is enhanced, then the rubber is subjected to foaming treatment, the noise reduction and antiskid performance is greatly improved, a rigid material and a carbon nano tube in the rubber material can be embedded into a pore structure on the surface of granite, the noise reduction and antiskid performance is further enhanced, and the service life of the rubber material is prolonged. Finally, the porous volcanic rock particles and the foamed rubber structure are utilized to form air hole channels, and the noise reduction and drainage performance is enhanced.

The invention relates to a head and neck tumor radiotherapy auxiliary supporting and positioning device which comprises a bed body, a movable rack, a base plate, a foaming rubber pad, a thermoplastic positioning film, a protective cover and a positioning mechanism, the movable rack is connected with the bed body in an inserted mode, the base plate is arranged on the movable rack, and the positioning mechanism is arranged at the bottom of the movable rack and comprises a lifting plate, a connecting sleeve, a supporting rod and a spring I; the supporting rod can penetrate through the hole position to support the head in advance, and the fixing assembly can lock the position of the supporting rod. The lifting plate is driven by a screw I to ascend and descend, a step rod is matched with a spring II to lock the position of the step rod, and emergency unlocking can be achieved through a traction rope between a baffle strip and the step rod. The device can realize accurate positioning of the head and the neck, improves the comfort level of a patient, is suitable for auxiliary positioning during radiotherapy of head and neck tumors, and solves the problems that an existing radiotherapy auxiliary device is complex in pre-fixing adjustment, poor in adaptability after a patient is emaciated, difficult to disassemble quickly in an emergency situation and the like.

The invention discloses a supercritical carbon dioxide foamed rubber material and a preparation method thereof, and belongs to the technical field of foamed rubber. The foaming rubber is prepared from the following raw materials in parts by weight: 70 to 80 parts of natural rubber, 20 to 30 parts of chloroprene rubber, 20 to 30 parts of white carbon black, 4 to 5 parts of plasticizer, 1 to 1.5 parts of activating agent, 1 to 1.5 parts of coupling agent, 2 parts of anti-aging agent, 1.8 parts of sulfur, 3 to 4 parts of accelerant, 0.2 part of scorch retarder, 1 to 1.5 parts of potassium adipate, 5 parts of zinc oxide, 2 parts of magnesium oxide, 2 parts of stearic acid and 3.5 to 3.65 parts of supercritical carbon dioxide fluid. The continuous production of the rubber physical foaming sole can be realized, the foaming rubber vulcanization and foaming process can be completed by a one-time process, the size is basically stable after mold stripping, the sole can be used for subsequent shoemaking production without further processing, and the sole with relatively complex appearance size can be produced. The method is suitable for preparing the foamed rubber sole.

The utility model discloses a foaming rubber forming and cooling device which comprises a machine frame, a conveying belt arranged at the upper end of the machine frame and a rubber product arranged on the conveying belt and conveyed by the conveying belt to move, and a cooling mechanism is arranged at the upper end of the machine frame. The cooling mechanism comprises a cooling frame which is arranged at the upper end of the rack and located above the conveying belt, and cooling fans are evenly arranged on the cooling frame in the length direction of the conveying belt. The overturning assembly is used for overturning the rubber products and comprises base plates which are fixedly arranged on the outer side of the conveying belt and are uniformly distributed in the length direction of the conveying belt. According to the foaming rubber forming and cooling device, the arranged cooling mechanism is matched with the overturning assembly, so that a rubber product can be overturned while being cooled, the cooling effect on the rubber product is improved, the cooling uniformity is good, and the product quality is improved.

The utility model discloses a vehicle rubber foam gluing device which comprises a bottom plate, the left side of the top of the bottom plate is fixedly connected with a vertical plate, and the top of the vertical plate is fixedly connected with a box body. The first motor, the rotating rod and the stirring rod are matched to stir colloid so as to prevent the colloid from being solidified, the pressurizing pump can pressurize the interior of the box body, the internal pressure intensity of the box body is larger than the external pressure intensity, so that the colloid is conveniently discharged, and the one-way valve sleeves the surface of the conveying pipe between the pressurizing pump and the box body so as to prevent the colloid from being solidified. The surface of a glue outlet pipe is sleeved with an adjusting valve, the glue outlet speed can be adjusted, the surface of the vehicle rubber foam can be coated with glue through cooperation of a second motor, a first belt wheel, a support, a glue coating roller and a second belt wheel, redundant glue can be scraped and collected through cooperation of a glue scraping plate and a collecting groove, and the glue coating efficiency is improved. Therefore, the colloid can be reused.

To provide a composition for manufacturing a foam layer of a foam rubber roller, and to provide a foam rubber roller having the foam layer.SOLUTION: A composition for manufacturing a foam layer comprises silicone rubber, water, a water-absorbing polymer, and a surfactant, and is characterized in that a weight ratio (X) of the water-absorbing polymer to the silicone rubber and a weight ratio (Y) of the surfactant to the silicone rubber satisfy the following conditions: 2.5 wt.%≤X≤20 wt.%, 0 wt.%<Y<2 wt.%. A foam rubber roller comprises a core material and a foam layer provided on the outer periphery of the core material, and is characterized in that the foam layer contains the silicone rubber, the water-absorbing polymer, and the surfactant, and that the weight ratio (X) of the water-absorbing polymer to the silicone rubber and the weight ratio (Y) of the surfactant to the silicone rubber satisfy the following conditions: 2.5 wt.%≤X≤20 wt.%, 0 wt.%<Y<2 wt.%.SELECTED DRAWING: Figure 1

The utility model provides a scrubbing appliance which comprises a bottom belt, a reinforced scrubbing towel and a waterproof foaming rubber gasket, the reinforced scrubbing towel is connected to the bottom belt, a first connecting piece is arranged on the reinforced scrubbing towel, a second connecting piece is arranged on the bottom belt, and the first connecting piece can be connected with or detached from the second connecting piece; the waterproof foaming rubber gasket is filled between the enhanced rubbing towel and the bottom belt; cotton fibers on the transverse ridge on the surface of the enhanced rubbing towel scrape the skin, and cotton velvet strokes the skin, so that dirt can be removed comfortably and quickly. When the first connecting piece and the second connecting piece are detached and the bottom belt is unfolded, the device is used as a back rubbing belt; when the bottom belt and the enhanced scrubbing towel are rolled up, the first connecting piece and the second connecting piece are connected to form a cylinder to be used as a scrubbing block. And the scrubbing block and the scrubbing strap can be switched for use, so that one object has two purposes and is convenient to use and store. When a user takes a bath, the enhanced scrubbing towel is used as a scrubbing surface and is matched with the foaming rubber gasket, so that dirt can be softly, elastically, comfortably and quickly removed.

The invention discloses a foamed rubber asphalt formula determination method. The method comprises the following steps: S1, constructing a molecular model of a foamed rubber asphalt composite system; s2, performing molecular dynamics simulation on the molecular model to obtain a balanced stable structure configuration; s3, based on the stable structure configuration, under the conditions of different rubber mixing amounts, foaming medium mixing amounts and temperatures, calculating the shear modulus, interface adhesion work and fracture energy of the foam rubber asphalt system; and S4, performing multi-objective optimization by taking the shear modulus, the interface adhesion work and the fracture energy as performance indexes, and determining a combination of the temperature, the foaming medium mixing amount and the rubber mixing amount of the optimal formula of the foamed rubber asphalt. According to the method, the combination of the foaming temperature, the foaming medium mixing amount and the rubber mixing amount is determined through molecular modeling and a multi-objective optimization algorithm, and performance prediction and parameter optimization of the foamed rubber asphalt are achieved.

The utility model provides a kind of dustproof liquid seal structure of power distribution cabinet, belong to distribution cabinet field, including distribution cabinet body, dustproof liquid mechanism of dust and liquid invasion is prevented is provided on the distribution cabinet body, the fixed component of fixed equipment is provided in the distribution cabinet body inside.The utility model is provided with dustproof liquid mechanism and foam rubber strip, when using, dust and liquid collecting groove is directly fallen into dust and liquid collecting groove place by door gap when liquid invasion, liquid will be discharged from dust and liquid collecting groove, foam rubber strip can be tightly attached with the counter eaves welded on outer extension door frame, foam rubber strip generates deformation, sealing performance is outstanding, completely prevents dust from entering cabinet body inside, under the condition that liquid flow rate is not enough when dust and liquid collecting groove discharges liquid, liquid can also be prevented from entering distribution box inside.

The invention relates to the technical field of assembly type formworks, in particular to a non-truss standardized assembly type formwork and a construction technology thereof.The non-truss standardized assembly type formwork comprises a plate face body, transverse angle steel and vertical angle steel, the transverse angle steel and the vertical angle steel are installed on the lower portion and the side edge of the plate face body correspondingly, and the rear side of the plate face body is connected with a rib plate; the plate face body and the rib plates located on the rear side of the plate face body are combined into linear plate pieces, a gap between every two adjacent linear plate pieces is filled with foam double-faced adhesive tape, a reinforcing assembly is installed on the rear sides of the linear plate pieces, and special-shaped plate pieces are connected to the outer sides of the linear plate pieces. According to the non-truss and standardized assembly type formwork and the construction technology thereof, through standardization and assembly of non-truss linear plate pieces, standardization and assembly of transverse walings and vertical walings and assembly type connection modes between the transverse walings and the linear plate pieces and between the vertical walings and the linear plate pieces, the specifications and types need to be overall controlled during manufacturing of the new formwork; the standardization degree and the assembly efficiency are improved, and then the turnover performance and the utilization rate of the formwork are improved.

The invention discloses a double-layer tire and a uniformity detection device thereof, and relates to the technical field of tire manufacturing, the double-layer tire comprises a double-layer tire, a rotating column and a mounting seat for mounting the double-layer tire, the mounting seat is provided with a sealing clamping piece for clamping the upper edge and the lower edge of the double-layer tire, and the mounting seat is provided with an inflation assembly acting on the inner side of the double-layer tire. The tire provided by the invention has the technical advantages that the tire manufactured by adopting the formula of the outer-layer wear-resistant rubber material and the inner-layer foaming rubber material can be directly used without assembling an inner tube and inflating, so that the problem that the use is influenced by air leakage or tire burst of the inner tube is solved; the inflation assembly inflates the interior of the double-layer tire, the pressing box and the crimping part are driven by the rotating column to rotate around the double-layer tire, the double-layer tire is pressed by the crimping part to deform during the period, the pressure value generated by deformation is detected in real time by the pressure gauge in the circumferential rotation process, and then uniformity detection of the interior of the double-layer tire is achieved.

The utility model relates to the technical field of nail making machines, in particular to a feeding structure of a screw processing nail making machine, which comprises a nail making machine, a fixed pulley and a sponge block, one end of the nail making machine is provided with a mounting shell, a wrapping post is mounted in the mounting shell, and a screw blank is wound on the outer side of the wrapping post; one side of the feeding channel is connected with a blank protecting sleeve, the blank protecting sleeve is made of a polyurethane foaming rubber material, a sponge block is arranged at the position, located on the periphery of the wire passing hole, of the inner side of the blank protecting sleeve, and the wire passing hole is formed in the sponge block; the novel feeding structure is provided with a structure for lubricating the screw blank, the friction resistance borne by the screw blank in the machining process can be reduced, and then the feeding effect can be effectively improved.

The invention relates to the related technical field of aluminum alloy door and window frames, and discloses an assembly type energy-saving aluminum alloy door and window frame structure which comprises a main profile frame and an auxiliary profile frame which are attached to each other, and a plurality of independent heat preservation cavities and an energy-saving sealing assembly are formed in the main profile frame in the length direction. The auxiliary profile frame is arranged on the inner side of the main profile frame, an EPDM foaming rubber strip, a silicone rubber sealing rubber strip and a sponge rubber strip are sequentially arranged on the inner side of the main profile frame from inside to outside, and a plurality of corner connecting pieces are symmetrically arranged on the front side and the rear side of the joint of the main profile frame and the auxiliary profile frame. According to the assembly type energy-saving aluminum alloy door and window frame structure, through the energy-saving sealing assembly and the multiple corner connecting pieces arranged at the corners where the main profile frame and the auxiliary profile frame are connected, the heat insulation and energy saving performance, the structural stability and the assembly convenience of an aluminum alloy door and window are improved, meanwhile, durability and functional diversity are considered, the heat insulation effect is good, and the service life of the aluminum alloy door and window is prolonged. Multiple sealing is achieved, and building energy saving is assisted to reach the standard.

The utility model provides a vehicle body sealing structure and a vehicle, and belongs to the technical field of vehicles, the vehicle body sealing structure comprises a framework, a foaming rubber block and a hot melting flowing rubber block, and the framework is sequentially provided with a hot melting sealing area and a foaming limiting groove from top to bottom; the foaming rubber block is arranged in the foaming limiting groove, and a foaming filling area between the foaming limiting groove and the automobile body metal plate is filled with the foaming rubber block after foaming, so that a first sealing structure is formed; and the hot melting flowing rubber block is arranged in the hot melting sealing area, flows to the foamed foaming rubber block after hot melting, and fills a gap between the foaming rubber block and the automobile body metal plate, so that a second sealing structure is formed. According to the utility model, the polystyrene foam is matched with the hot-melt flowing glue, during electrophoresis baking, the polystyrene foam is firstly foamed and is in contact with the automobile body metal plate to form a first sealing structure, and the hot-melt flowing glue is then melted and flows to a narrow gap between the polystyrene foam and the metal plate under the action of gravity to form a second sealing structure; therefore, double sealing of the gap between the automobile body metal plates is achieved, and a better sealing effect is achieved.

The utility model discloses a bubble eliminating device in foam rubber die cutting processing, which comprises a tank body, a plurality of circumferentially arranged supporting rods are arranged at the lower end of the tank body, a feeding pipe is arranged at the upper end of the tank body, a discharging pipe is arranged at the lower end of the tank body, sleeves are arranged at the upper end and the lower end of the tank body in a penetrating manner, and a rotating pipe is slidably connected between the two sleeves in a penetrating manner. A plurality of stirring rods arranged at equal intervals are arranged on the outer wall of the rotating pipe and communicate with the rotating pipe, and a heating mechanism used for heating the rotating pipe and the stirring rods is arranged at the upper end of the tank body. The gear ring rotates to drive the rotating pipe and the stirring rods to rotate, raw materials are stirred, gas is discharged from the raw materials, the connecting plate is connected with the rotating pipe, and the rotating pipe is slidably connected with the two sleeves, so that the rotating pipe drives the stirring rods to vibrate in the tank body, and the raw materials are stirred. Bubbles in the raw materials are shattered through vibration.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

The invention provides a method for estimating thermal expansion molding process parameters of a foam sandwich composite material, the foam sandwich composite material and a preparation method of the foam sandwich composite material. The estimation method comprises the following steps: testing an expansion pressure-time relation curve of the expandable foam rubber under the conditions of different temperatures and different expansion rates, and when the maximum value of the expansion pressure exceeds 100 kPa, recording a corresponding expansion rate range and a temperature range; testing a viscosity-curing time relation curve of resin in the prepreg at different temperatures, and recording a corresponding temperature range when the curing time does not exceed 10 minutes and the viscosity is not lower than 100 Pa.s; and taking the overlapped part of the recorded temperature range of the expandable foam rubber and the recorded temperature range of the resin as an estimated temperature range of thermal expansion mold pressing, and taking the recorded expansion rate range as an estimated expansion rate range of a thermal expansion mold pressing process. According to the estimation method, the production process stability of the sandwich composite material is improved.

The invention discloses a foaming adhesive film penetrability testing tool and a testing method. The testing tool comprises a base; the testing platform is arranged on the base through a plurality of adjusting supports and is used for bearing a foaming adhesive film to be tested; the calibration mechanism is used for detecting the levelness of the test platform; the bracket is arranged on the base; and the load loading mechanism is arranged on the bracket and is used for applying a load to the to-be-tested foaming adhesive film. Quantitative test characterization of the penetrability of the foaming adhesive film is achieved, dependence on the skill level of an operator can be effectively reduced, meanwhile, the stability and reproducibility of a test result can be improved, and the method is suitable for penetrability tests of various types of adhesive films and other flexible materials.

A front bearing beam structure of a sunlight room comprises a first cross beam and a second cross beam, the side portion of the first cross beam is connected with the side portion of the second cross beam through two heat insulation strips, the second cross beam is located on the right side of the first cross beam side by side, and a rectangular first cavity is defined by the first cross beam, the second cross beam and the two heat insulation strips; in conclusion, the front bearing beam structure mainly bears the overall weight of the sunlight room, the front bearing beam structure is connected with the stand columns and the corners through groove type corner connectors, the overall strength of the sunlight room is guaranteed, the conversion angle between the front bearing beam structure and the main beam ranges from 90 degrees to 150 degrees, the installation flexibility is high, the two steel plates are arranged in the second cavity in a penetrating mode, and installation is convenient. The supporting strength of the first cross beam is improved, the foaming rubber strip is arranged on the circular tube cross beam, and the sealing performance between the circular tube cross beam and the steel structure body is guaranteed.

The invention provides a computer control-based polystyrene foam raw material mixing device, which comprises a barrel body, a support rod and a transition barrel are fixed at the bottom of the barrel body, a discharge pipe is fixed at the side of the transition barrel, a lifting mechanism is fixedly mounted at the bottom of the transition barrel, a support plate is fixed at the side of the barrel body, and the support plate is fixed at the bottom of the transition barrel. And a water pump is fixedly mounted on the supporting plate. According to the polystyrene foam raw material mixing device based on computer control, when the polystyrene foam raw material mixing device is used, materials preliminarily stirred through a stirring rod enter a transition barrel through a feeding hole, the materials are stirred again through a mixing rod when passing through the interior of the feeding hole, and the materials are extruded upwards through a piston seat in the later period; and the materials enter the barrel body through the feeding hole again, the materials are rapidly mixed after reciprocating multi-point stirring of the materials is completed, in addition, the piston seat moves downwards to the bottommost part and then loses shielding of the discharging pipe, and the materials are rapidly discharged from the interior of the discharging pipe.

The tool comprises a bottom plate, a product supporting plate and a pressing plate, the pressing plate is installed on the bottom plate through an elastic mechanism, sliding rails matched with the product supporting plate in a sliding mode are arranged on the portions, on the two sides of the product supporting plate, of the bottom plate, and a drawing opening of the product supporting plate is formed between the front ends of the sliding rails. A baffle of the product supporting plate is arranged on the bottom plate at the rear end of the sliding rail; the product supporting plate is provided with a double-step groove used for containing a product and a foam double-faced adhesive tape, a colloid pressing needle is arranged on the pressing plate right opposite to the double-step groove, and the foam double-faced adhesive tape is attached to the product under the action of the colloid pressing needle. According to the utility model, the product supporting plate with the double-step groove and the sliding rail are arranged, so that the product supporting plate slides back and forth in the vertical direction of the sliding rail, a product and a foam double-sided adhesive tape are convenient to place, the product and the foam double-sided adhesive tape do not move in the laminating process, and the positioning effect is good; and by arranging the pressing plate and the spring mechanism, fitting of the product and the foam double-faced adhesive tape and stripping of the foam double-faced adhesive tape are achieved, and the working efficiency is high.

The invention relates to the technical field of thermal insulation cotton production, in particular to an extruder for foamed rubber thermal insulation cotton production, which comprises a base, an extruder, a winding mechanism and a cooling mechanism, the extruder is connected onto the base, and the cooling mechanism and the winding mechanism are sequentially arranged at the material output end of the extruder. The cooling mechanism is used for cooling heat preservation cotton produced by the extruder, and the winding mechanism comprises a winding unit and a discharging unit. Material rollers which are used alternately are arranged, a first power motor can drive the lower material roller to rotate so as to wind heat preservation cotton, after the heat preservation cotton is wound to the sufficient amount, the heat preservation cotton pushes a contact roller to move downwards, then a spline shaft is driven by a control rod to move downwards, a first gear ring and a second gear ring are meshed to drive a worm to rotate, and the worm drives a worm gear to drive a rotating wheel to rotate; in this way, position interchange of the material rollers is achieved, the material rollers completing winding are guided out through the guide support to achieve the automatic discharging effect, and the vacant material rollers move to the position below the rotating wheel to conduct winding of heat preservation cotton.

The utility model discloses a shock-proof shock-resistant bamboo weaving safety helmet, which relates to the technical field of bamboo weaving safety helmets, and comprises a helmet body and foam glue layers fixedly arranged on the inner side and the outer side of the helmet body, a toughening layer is fixedly arranged outside the foam glue layers, the helmet body comprises a top rib part, and the toughening layer is fixedly arranged outside the foam glue layer corresponding to the top rib part. A warning layer used for shining in a dark environment is fixedly arranged on the outer side of the cap body and / or the toughening layer, a protective layer used for slowing down abrasion of the warning layer is fixedly arranged on the outer side of the warning layer, and the protective layer is pervious to light; the shock-proof and shock-resistant cap has the advantages that the toughening layer is arranged on the outer side of the foam rubber layer, so that the toughness of the cap body is improved, and the shock-proof and shock-resistant effects are further enhanced; when the toughening layer is arranged, the toughening layer can be only arranged at the position of the top rib part, so that the corresponding effect of top end protection is provided, and the use of materials is reduced; the warning layer is arranged on the outer side of the cap body and / or the toughening layer, so that a shining effect is provided in a dark environment, attention of surrounding personnel is facilitated, and the safety is improved; the protective layer is arranged on the outer side of the warning layer, so that abrasion of the warning layer is relieved, and the service life is prolonged.

The invention discloses a liquid rubber foaming product and a preparation method thereof, and belongs to the field of foaming rubber. The liquid rubber foaming product comprises the following raw materials in parts by mass: 100 parts of hydrophilic modified polybutadiene rubber, 3-5 parts of a plasticizer, 0.5-2 parts of a crosslinking aid, 5-8 parts of an acrylamide-acrylic acid copolymer, 3-8 parts of a foaming agent, 1-3 parts of a surfactant and 10-20 parts of filler, wherein a molecular chain of the hydrophilic modified polybutadiene rubber is grafted with a polyethylene glycol chain segment. Through hydrophilic modification, the polybutadiene rubber can directly take water as a dispersion medium, and the use of organic solvents such as benzene or gasoline is avoided in the preparation process of a foamed product, so that the effect of eliminating volatile organic compounds is achieved. The liquid-state rubber foaming agent has good mechanical properties and can cooperate with an acrylamide-acrylic acid copolymer to form a hydrogen bond-covalent bond double-crosslinking network, so that a vulcanization process and a foaming process can be better matched, and a liquid-state rubber foaming product with excellent performance is obtained.

The invention relates to a method for filling a cavity between an R angle and a right angle matching surface, which comprises the following steps: fitting a part with an R angle with a side pressing plate, and enabling the top end of the part with the R angle to be flush with the top end of the side pressing plate so as to form a cavity similar to a triangle; polystyrene foam is cut into a uniform-section cylinder with the same length as the triangular-like cavity; the sectional area of the polystyrene foam is calculated, and the polystyrene foam is cut according to the calculation result so that the polystyrene foam can be matched with the triangle-like cavity; the foaming rubber is stuffed into the similar triangular cavity, and the top pressing plate covers the top ends of the part with the R angle and the side pressing plate; feeding the combined part with the R angle, the side pressing plate, the top pressing plate and the polystyrene foam into a drying oven for curing the polystyrene foam; and the two ends of the cured polystyrene foam are cut, so that the cured polystyrene foam is as long as the triangle-like cavity. According to the invention, twisted strips are not needed, a good filling effect is ensured, the production cost is reduced, the production period is shortened, and the filling efficiency is improved.