138results about How to "There will be no shedding" patented technology

The invention discloses a method for preparing a post-finished nanometer negative ion automobile internal decorative fabric, comprising the following steps that: nanometer negative ion powder is added into the de-ionized water and is stirred at a high speed; a dispersing agent of sodium polyacrylate and a silicone hydride coupling agent are added at a temperature of between 40 and 50 DEG C; the mass ratio of the de-ionized water to the nanometer negative ion powder to the dispersing agent and to the coupling agent is 100:8 to 15:3.0 to 3.5:3 to 4, the silicone hydride coupling agent is selected from vinyl silane, amino silane, meth acryloxy silane, hydrosulphonyl silane or uramido silane; the nanometer negative ion finishing agent is obtained by stirring and the ultra audible sound dispersing process; after the nanometer negative ion finishing agent is diluted, and the immersing-padding-drying technique is adopted to prepare the post-finished nanometer negative ion automobile internal decorative fabric. The nanometer negative ion plug material not only has good shakeproof stability and rub resistance, but also releases air negative ions with high concentration, thereby being suitable for the automobile internal decoration field.

The invention discloses an efficient oxygenation system for a confined space. The system comprises an aeration tank, a plurality of flow guiding plates are arranged in the aeration tank in the water flow direction and divide the aeration tank into a plurality of areas, different quantities of aerators are arranged in the areas in a concentrated mode according to the oxygen dissolving requirements of the areas, the aerators are rotary-cutting and mixed-flowing aeration devices, a flow guiding cutter is arranged over a water outlet of each rotary-cutting and mixed-flowing aeration device and arranged outside a corresponding central air inlet pipe, and a buffer distance is formed between each flow guiding cutter and the corresponding water outlet; each flow guiding cutter is an inverted cone with the conicity of 60 degrees to 65 degrees. According to the efficient oxygenation system for the confined space, the problems that in actual engineering, aeration in an aerobic tank is not uniform, the total oxygen dissolving efficiency is low, sludge in the tank is deposited, the aerators are prone to fall off and be blocked and aged, the oxygen utilization efficiency is rapidly lowered, management and maintenance are inconvenient, and the cost is high are solved.

The invention discloses a composite material tamping tine and a preparation method thereof, and belongs to the technical field of preparation of components and parts. The composite material tamping tine comprises a tine body and a tine palm, wherein a layer of ceramic particle reinforcement metal matrix composites wraps the peripheral surface of the tine palm, the ceramic particle reinforcement metal matrix composite layer is 5-20mm in thickness, a volume fraction of particles is 20%-80%, the tine body is a metal matrix, the tine palm and the tine body are connected together through welding, and the tine palm of the composite material tamping tine is prepared through a pressure casting method. The composite material tamping tine is high in hardness, has high abrasion resistance and impact performance, comprises a thick abrasion resisting layer which can not fall off, greatly prolongs use life, substantially improves work efficiency of a tamper, is compact and flawless in tissue and good in synthesized mechanical performance by adopting a pressure casting method, and furthermore is simple in technology, low in cost, and capable of obtaining great economic benefit.

The invention discloses a system for efficiently carrying out oxygenation in finite space. The system comprises an aeration tank, wherein a plurality of guide plates are arranged in the aeration tank and divide the aeration tank into a plurality of areas; and different quantities of aerators are arranged in the plurality of areas respectively in a concentrated manner according to the oxygen dissolution requirements of the areas. The system is designed aiming at some defects of existing aeration systems in the actual operational processes and can be applied to aerobic biological treatment units of various industrial wastewater and domestic sewage. The problems of nonuniformity of aeration in aerobic tanks, low overall oxygen dissolution efficiency, accumulation of sludge in tanks, easiness in falloff, blockage and aging of the aerators, quickness in reduction of the oxygen utilization efficiency, inconvenience in management and maintenance, high cost, and the like in actual engineering are solved by adopting the system.

The invention provides an aluminum electrolysis cell provided with a continuous anode. The aluminum electrolysis cell comprises an electrolytic cell, a cathode which is arranged at the bottom of the electrolytic cell, and a continuous anode component which is arranged on the electrolytic cell, wherein the continuous anode component comprises an anode metal shell of which the lower end is opened, and an anode body which is arranged inside the anode metal shell; the lower end part of the anode body extends out of the opening of the lower end of the anode metal shell; the circumferential side, extending out of the anode metal shell, of the anode body is provided with a plurality of electrode bars; the anode metal shell is provided with an anode feeding hole for filling a particle mixed raw material; the circumferential side the opening of the lower end is also provided with a plurality of cutting components for cutting the anode body so that the height of the anode body can be reduced. The aluminum electrolysis cell provided with the continuous anode needs not to repeatedly replace an incomplete anode, so a continuous anode technique is realized and environmental pollution is reduced as well.

The invention discloses a production method of a flame-retardant reflective warning tape. The method is characterized by comprising the following steps of 1, implantation of beads, wherein a PE layer I (1) in a PET-PE composite membrane I is heated and softened, then glass beads (2) are embedded in the PE layer I (1), the glass beads (2) are coated with an adhesive, and baking is carried out; 2, membrane covering at intervals, wherein PE layers II in a PET-PE composite membrane II after segmentation are heated and softened, and then the PE layers II are attached with equal distances to obtain spaced bead implantation membranes; 3, aluminizing, wherein the spaced bead implantation membranes in the second step are aluminized to obtain aluminized layers (4), and the PET-PE composite membrane II embedded in focusing layers (3) is peeled off; 4, recombination, wherein an adhesive layer of a pretreated base fabric and adhesive layers of pretreated spaced aluminized bead implantation membranes are recombined to form a flame-retardant adhesive layer (7), the PET-PE composite membrane I embedded on the surfaces of the glass beads (2) is peeled off, and the flame-retardant reflective warning tape is obtained. The production method of the flame-retardant reflective warning tape has the advantages of being simple in process, flat and smooth in touch and obvious in boundary.

The invention discloses a self-protection flux-cored wire for strengthening the surface of a large hot-forging die and a production method of the self-protection flux-cored wire. The flux-cored wire comprises, by mass percentage, 26-30% of chromium, 8-10% of molybdenum, 1.8-3% of tungsten, 1.5-2.5% of nickel, 0.8-1.2% of silicon, 0.6-1.0% of manganese, 0.15-0.3% of niobium, 1.2-1.6% of carbon, not larger than 0.02% of phosphorus, not larger than 0.02% of sulfur and the balance cobalt and impurities. By the adoption of the self-protection flux-cored wire for strengthening the surface of the large hot-forging die, overlaying of the flux-cored wire is conducted on the surface of the working region of a die cavity of the large hot-forging die, the surface strengthened layer is formed, the temperature of the surface layer of the die cavity of the large hot-forging die is below 500-700 DEG C, the wear, deformation and crack are not likely to generate under the extreme working condition that the load is above 40,000 tons, the service life of the large hot-forging die is prolonged by over 10 times, and the manufacturing cost of large forgings is lowered remarkably.

The invention discloses a music score display device having an automatic page turning function. The music score display device includes a base; the top of the base is fixedly connected to a supportingcolumn; the top of the supporting column is fixedly connected to a music score frame; and supporting plates are fixedly connected to two sides of the top of the music score frame. An output shaft ofa motor can drive a gear to rotate through cooperation of the motor and the gear; rotation can drive a first threaded rod and a second threaded rod to rotate through cooperation of a first bevel gear,the first threaded rod, a second bevel gear, and the second threaded rod; a first connection rod and a second connection rod move horizontally to allow a first page turning sucker to turn a page, allow the first page turning sucker and a second page turning sucker to drive a music score to turn up the page through the first page turning sucker, the first connection rod, the second page turning sucker, and the second connection rod; and the problem that manual page turning can affect the playing continuity and lower the playing effect can be solved.

The invention belongs to the technical field of production of an easy-to-open lid and particularly relates to an easy-to-open lid sheet coating. The coating comprises (1) a solvent system comprising ethylene glycol butyl ether, xylene, n-butanol and diethylene glycol butyl ether acetate, (2) a resin component comprising polymer-modified epoxy resin, phenolic resin and high alkyl etherified benzoguanamine resin, and (3) an auxiliary system comprising a defoamer, PE wax, carnauba wax and a leveling agent. The easy-to-open lid sheet coating does not contain BPA. The single-coated surface and thedouble-coated surface have high glossiness and good leveling properties. The easy-to-open lid sheet coating can provide effective protection, has strong adhesion and MEK wiping of 30 rubs, does not fall off after long-term preservation and effectively guarantees the purity and safety of the liquid in the tank.

The invention discloses a shuttlecock gluing device, comprising a body. The body comprises a base, a support plate, a support base and a hydraulic cylinder. The base is disposed at the lower portion of the body. The upper surface of the base is provided with a slide rail. The support base is disposed on the slide rail. The hydraulic cylinder is disposed on the support base. An output portion of the hydraulic cylinder is connected with a hydraulic bar. An end of the hydraulic bar is provided with an ejector head. The support plate is disposed on the other side of the slide rail. A positioning disc is disposed on the surface of the support plate. A clamping groove is arranged inside the positioning disc. An adjustable limit is arranged on a position, parallel to the positioning disc, of the surface of the support plate. A drive wheel is disposed inside the adjustable limit and connected with a drive shaft. The other side of the drive shaft is connected with the support base. A glue jar is disposed on the support plate. A pneumatic device is disposed to the right of the glue jar. The shuttlecock gluing device has the advantages of reasonable structural design, gluing uniformity, convenience of use and the like.

The invention provides a printed circuit board and a fabrication method thereof. The printed circuit board comprises a metal substrate, wherein at least one through hole is formed in the metal substrate, a first insulation layer is arranged on the metal substrate, a first copper foil layer is arranged on the first insulation layer, a circuit pattern is formed on the first copper foil layer, a circle of insulation ring is arranged on an inner wall of the through hole and is formed by stamping an insulation block filled in the through hole, and the insulation block is pasted on the metal substrate by the first insulation layer when the metal substrate, the first insulation layer and the first copper foil layer are laminated. The invention also provides the fabrication method of the printed circuit board. The printed circuit board has the advantages of good working reliability and is convenient to fabricate, the fabrication method of the printed circuit board has the advantages of simple process, processing convenience, and the finished product of the printed circuit board has good working reliability.

The invention relates to the technical field of ground cleaning, and discloses a cleaning device for a handheld scrubber. The cleaning device comprises a sewage tank, wherein a sewage discharging pipe is fixedly mounted on the side face of the sewage tank, a machine body base is fixedly mounted at the bottom of the sewage tank, and a clear water tank is fixedly mounted on the upper surface of the machine body base. According to the device, sewage in the whole device can be sucked into the sewage tank through a sewage suction pipe, and meanwhile, due to the arrangement of a sewage suction pipe joint, the sewage suction pipe can have a larger area to absorb the sewage; the sewage discharging pipe connector is connected with a sewage discharging pipe, so that sewage can be discharged out of the whole device. All structures can be stably installed through limiting blocks, the position deviation situation is avoided, and therefore the structure of the whole device is more stable, and a falling situation is avoided, and therefore, the whole device does not need to be disassembled, and the purpose that the whole device is more stable and more attractive is achieved.

The invention relates to a multi-pyramid surface friction shock-isolation bearing and a shock-isolation system. The polygonal pyramid surface friction shock-isolation support includes: an upper deck, a middle structure and a lower structure; a groove in the shape of a polygonal pyramid is arranged on the lower structure to form a sliding concave surface of the polygonal pyramid; the middle structure includes a A flat plate, the lower surface of the flat plate is provided with a convex column, and the lower end of the convex column is a polygonal pyramid sliding convex surface matching the shape of the polygonal pyramid sliding concave surface, so that the convex column can slide in the groove; the upper surface of the flat plate is provided with a circular snap ring; The bottom of the upper card seat is matched with the snap ring through the card slot, so that the upper card seat can rotate relative to the middle structure. The vibration isolation system also includes a cross vertical anti-lift-off limiting device. The seismic isolation support provided by the present invention avoids the problem of resonance, does not cause the slider to fall off, and ensures that sufficient vertical load can be provided under any circumstances; A bit device prevents the building from toppling over.

The invention discloses a laser cladding boride-based wear-resistant coating as well as a preparation method and application thereof, and belongs to the technical field of metal surface treatment. The wear-resistant coating is prepared from the following raw materials in percentage by mass: 45 to 50 weight percent of Mo powder, 20 to 25 weight percent of Fe powder and 25 to 30 weight percent of FeB powder. The wear-resistant coating provided by the invention is applied to wear-resistant tool parts, the surface hardness of the coating is high, the wear resistance is excellent, the service life is greatly prolonged by 5 times or above, and meanwhile, as the coating and a matrix are metallurgically bonded, the condition that the coating falls off cannot occur. In addition, materials used by the coating are low in cost, no high-cost alloy element exists, and the use cost performance is very high.

There is provided an improved tracheostomy tube (40) having a distal section (34) that over-molds a proximal section (24). The distal section is desirably made from a more flexible polymer than the proximal section to reduce trauma should the distal section contact the tracheal wall. The insertion of the tracheal tube in the trachea results in large forces being exerted on the tube. Forces acting on the tube after installation can also be rather large. Over-molding of the proximal section by the distal section results in a stronger bond than if the parts are butt-welded. The sections are desirably made from the same polymer and are desirably substantially transparent or clear to visible light so that cameras or other observation means may be used to inspect the tracheal walls through the tracheostomy tube without removing it from the patient.

A large-scale engineer equipment transport vehicle includes a carrier plate; the left side of the carrier plate is rotatably connected with an inclined plate through a connecting block, the top of theinclined plate is rotatably connected with a rolling roller, the front face of the inclined plate is rotatably connected with a first roller through a first pillar, a second roller is rotatably connected to the bottom of the carrier plate, a left side of that front side of the carrier plate is fixedly connected with a second pillar, a third roller is rotatably connected to the top of the second pillar, the bottom of the carrier plate is fixedly connected with a motor box, the inner wall of the motor box is fixedly connected with the motor, an output shaft of the motor is fixedly connected with a take-up wheel, and a surface of the take-up wheel is connected with a cable; and one end of the cable sequentially passes through the second roller, the third roller and the first roller. The invention relates to the technical field of equipment transportation. The large-scale engineering equipment transport vehicle makes the engineering equipment convenient to load and unload onto the transport vehicle, and reduces the labor intensity of the transport vehicle loading and unloading engineering equipment.

The invention discloses a wind deflector installation mechanism for a skylight. The wind deflector installation mechanism is composed of two wind deflector installation mechanism bodies of the same structure. The two wind deflector installation mechanism bodies are symmetrically arranged about the central axis of a car body. A wind deflector is arranged between the two wind deflector installation mechanism bodies. One wind deflector installation mechanism body comprises a skylight wind deflector plug, a clamping hook, a guiding rail and a spring piece, wherein the skylight wind deflector plug is fixed to the guiding rail through the clamping hook, the wind deflector plug moves around the clamping hook, one end of the spring piece is a free end and makes contact with the unfixed portion of the skylight wind deflector plug, and the other end of the spring piece is a straight end and is fixed to the guiding rail. The wind deflector installation mechanism is fixed by adopting the clamping hook, the wind deflector plug only conducts the circular motion around the position of a circular arc of the clamping hook, and the wind deflector cannot be disengaged when a car runs into a large hollow or the car runs at higher speed.

The invention discloses an anti-falling device of building elements for building construction. The anti-falling device of the building elements for the building construction comprises a wall body anda plurality of bases. First circular grooves are formed in the bases. First expansion screws are installed in the first circular grooves, the first expansion screws penetrate through the bases and areconnected with the wall body, the building elements are installed on the bases through a plurality of locking mechanisms, connecting plates are arranged between every two adjacent bases in a clampingmode, and the bases adjacent to the connecting plates and the side walls of the building elements abut against the connecting plates. Anti-falling plates are fixedly connected to the connecting plates. A plurality of second circular grooves are formed in the anti-falling plates, and second expansion screws are installed in the second circular grooves. The anti-falling device of the building element for the building construction has the advantages that the structure is ingenious, the use is convenient, the bonding of traditional installation is avoided, the working environment is improved, theworking difficulty is reduced, and the building elements are prevented from falling through multi-directional limiting.

The invention discloses a slitting machine receiving rod fixing device. The slitting machine receiving rod fixing device comprises a receiving rod, the middle of the surface of the receiving rod is fixedly sleeved with a casing pipe in a manner of surrounding the circumference, fixing rings are fixedly connected to the upper portions and the lower portions of the two sides of the casing pipe, a transverse plate is arranged above the interior of the casing pipe, the two sides of the front face and the back face of the transverse plate are in sliding connection with sliding grooves formed in thefront portions of the two sides of the casing pipe, the transverse plate extends to the outer portion of the casing pipe, and tension springs are fixedly connected to the two sides of the transverseplate. According to the slitting machine receiving rod fixing device, through the receiving rod and the casing pipe and cooperative use of a soft ring, a soft block, the transverse plate, a pressing plate, a shell, a check block, a movable plate, a second spring, a soft block, a supporting plate and a supporting rod, a paper corner protection raw material can be rapidly fixed to the slitting machine receiving rod, the slitting machine receiving rod can fix the paper corner protection raw material more firmly, falling of the paper corner protection raw material is avoided, the quality of the cut paper corner protection raw material is ensured, and the trouble to the workers is avoided.

A dynamic oil smoke protective cover for a draught fan is disclosed. The protective cover comprises a protective cover main body having a circular truncated cone shape. The bottom and the side wall of the protective cover main body are in plate structures. The top of the protective cover main body is opened to form a wind outlet. The bottom and the side wall of the protective cover main body are respectively provided with evenly arranged micro holes. The protective cover overcomes the oil smoke pollution problem that is not liable to control and caused by separation of pumping drainage and treatment of range hoods at present, protects impellers and motors of the draught fan from being contaminated by oil smoke, and largely prolongs the maintenance period and service lifetime of the draught fan. Pre-purification is adopted, and is matched with a self-cleaning device, and therefore oil smoke particles can be removed efficiently for a long term, oil smoke is prevented from entering the draught fan and a pipeline, and problems frequently caused by oil smoke tail purification devices, namely fire hazards caused by long-term oil accumulation in oil smoke pipelines, secondary pollution in an oil smoke discharging process, and oil dropping and leakage in an oil smoke discharging port, can be effectively overcome.

The invention provides a voice diaphragm assembly processing method, a voice diaphragm assembly and a micro-loudspeaker. The voice diaphragm assembly processing method is provided; the voice diaphragmassembly comprises a voice diaphragm and a voice coil configured on the voice diaphragm; and the processing method is characterized by comprising the steps of: configuring the voice coil on a heat conduction mould; placing a voice diaphragm sheet over the voice coil, and heating the heat conduction mould to 90-110 DEG C; applying air pressure onto the upper surface of the voice diaphragm sheet, so that the voice diaphragm sheet is completely attached onto the voice coil and the heat conduction mould, and heating the heat conduction mould to 170-180 DEG C; cooling the heat conduction mould, sothat the voice diaphragm sheet is solidified on the voice coil, and forming the voice diaphragm assembly; and separating the voice diaphragm assembly from the heat conduction mould. The voice diaphragm is firmly attached onto the voice coil in a thermoplastic manner; and thus, the voice diaphragm cannot be separated.

The invention discloses a novel magnetic assembly and a preparation method thereof. The novel magnetic assembly comprises a soft magnetic base material and a plastic base material coated on the soft magnetic base material; and at least one end face of the soft magnetic base material is exposed out of one end face of the plastic base material. The preparation method of the novel magnetic assembly comprises the following steps of: taking iron powder and carrying out primary injection on the iron powder by injection molding equipment to form the soft magnetic base material; and then carrying out secondary injection on a plastic material by the injection molding equipment and coating the plastic material on the soft magnetic base material to form the plastic base material, wherein at least one end face of the soft magnetic base material is exposed out of one end face of the plastic base material. According to the invention, a product can be rapidly prepared by carrying out primary injection on materials such as the iron powder and the like in an injection molding manner to form the soft magnetic base material, then carrying out secondary injection on the plastic material and coating the plastic material on the soft magnetic base material to form the plastic base material; the product has a relative small thickness, is more attractive and practical, has a firmer structure and cannot generate the condition of magnet falling, so that the use performance of the novel magnetic assembly is effectively guaranteed and the novel magnetic assembly can meet the application requirements in various places.

The invention belongs to the technical field of big data processing, and particularly relates to an information processing device based on big data. The device comprises machine bodies, and the machine bodies are connected with partition plates through limiting strips and limiting grooves in a clamping manner. According to the invention, a plurality of machine bodies are arranged to be in a splicing type on the original basis. Through the clamping mode of the limiting racks and the one-way limiting blocks in the inserting grooves, the situation of falling is avoided, the stability of the whole row of devices after installation is guaranteed, the connecting mode is good in fixing effect and convenient to install and disassemble, through the arrangement of the partition plates facilitating rapid adjustment, the replacement speed of the internal devices during installation or transposition can be increased. By arranging a pressing and clamping structure in the partition plate, the use effect is good, operation is convenient, by arranging the heat dissipation fins capable of being rapidly replaced and installed, the installation efficiency can be improved during installation, the heat dissipation fins can be ejected out of the rear side of the machine body only by rotating the limiting blocks with the slotted holes during disassembly, and the device is simple and practical, and convenient to operate.

The invention discloses a composite material prepared from active carbon and used for adsorption. The composite material comprises, by weight, 15-25 parts of an adhesive, 4-8 parts of a transition metal compound, 8-16 parts of a carbon nitride compound, 10-16 parts of active carbon, 3-7 parts of nickel nitrate and 2-8 parts of tetrabutyl titanate. The composite material has the advantages of good purification effect and substantial use effects.

The invention discloses ball valve machining equipment. The equipment comprises valve cores with medium flow passages, valve bases matched with the outer walls of the valve cores, a rack, first fixingassemblies penetrating through the medium flow passages, a first driving assembly for driving the first fixing assemblies to rotate longitudinally, first clamping structures disposed on the first fixing assemblies, second fixing assemblies, second clamping structures disposed on the second fixing assemblies and a second driving assembly. The first clamping structures firmly abut against the innerwalls of the medium flow passages to fix the valve cores; the second clamping structures are used for clamping the valve bases to make the valve bases be in contact with the valve cores; the second driving assembly is used for driving the second fixing assemblies to rotate in order to drive the valve bases to be in friction with the valve cores. The valve bases different in specification and sizeand the valve cores different in specification and size are clamped by the same equipment; therefore, in the process of machining the valve bases and the valve cores, various matched valve bases andvalve cores can be machined by the same equipment at the same time, the machining efficiency is high, and the cost required by the equipment is reduced.

The invention belongs to the technical field of punching machining, and specifically discloses a device for avoiding excessive punching of a punching machine. The device comprises a base, a control system, a power system and a punching system. The control system comprises a spring, a connection rod, a drive block, a support, a start switch and a stop switch. The lower end of the spring is connected with a start ball. The upper end of the spring is connected with the connection rod. The drive block is arranged on the head portion of the connection rod. An arc-shaped groove is formed in one side of the drive block. An L-shaped rod capable of rotating relatively is connected to the support and comprises a long rod and a short rod. The long rod is located in the arc-shaped groove. The start switch is located on the side, close to the drive block, of the short rod. The stop switch is located on the other side of the short rod. By means of contact of the short rod and the start switch or the stop switch, movement or stop of a punch is achieved. Due to the adoption of the technical scheme, the defect that the movement stroke of a punch of a punching machine in the prior art is difficult to control can be overcome.

The invention discloses a method for preparing an outdoor weather-resistant advertising car sticker, which comprises a base material layer, an adhesive layer and a release layer, one side of the base material layer is coated on the adhesive layer, and the adhesive layer The side opposite to the substrate layer is provided with a release layer, and the adhesive layer is obtained by coating and drying the glue solution. The glue solution is obtained by the following steps: S1, adding 15 to 25 parts of methyl methacrylate, Mix 15~25 parts of styrene, 15~20 parts of 2-ethylhexyl acrylate, 1~1.5 parts of trimethylpentanediol, 1~5 parts of dimethylaminopropionitrile and 50~75 parts of deionized water , heat up to 75~80°C, add dropwise 0.5~1.5 parts of azoisobutylcyanoformamide and 1~10 parts of acrylic acid to the mixed system, and react for 3~4 hours; S2, cool to room temperature, add bis peroxide 2 , 1-5 parts of 4-dichlorobenzoyl, 1-1.5 parts of curing agent, 0.2-1 part of emulsifier and 0.1-1 part of hydroquinone, mix evenly to obtain glue; S3, evenly coat the glue On the substrate layer, dry to obtain the adhesive layer. The invention improves the waterproof performance, the adhesive force is basically unchanged, and the bonding is stable.

The invention relates to a 3D printing method for braille books. The method specifically comprises the following steps that S1, a three-dimensional model database with characters corresponding to braille projection points is established; S2, a braille book three-dimensional model is made; S3, the braille book three-dimensional model is sliced to obtain a G code file which can be recognized by a 3D printer; S4, the G code file obtained in the step S3 is transmitted to the 3D printer, a selective laser sintering forming machine is used for sintering printed braille pages, and entities of the braille book three-dimensional model are printed; S5, the printed braille book entities are subjected to post-treatment, so that the surfaces of the braille book entities are flatter and more smooth; and S6, the braille book entities are bound according to the page number sequence, and the braille book entities are bound into the braille books. The braille projection points manufactured by using the method are uniform and consistent, resistant to friction and capable of being repeatedly folded and used.

The invention discloses an anti-drop dairy cow drencher. The scheme is that the anti-drop dairy cow drencher comprises a cylinder, a piston, and a medicine feeding pipe. One end of the cylinder is provided with a cylinder cover. The piston is provided with a piston rod. One end of the piston rod is connected with the piston, and the other end extends out of the cylinder cover. The medicine feeding pipe comprises a horizontal pipe and a bended pipe. A short pipe extends from the middle part of the horizontal pipe. The short pipe is connected with a noose. Two ends of the bended pipe are connected with two ends of the horizontal pipe. The bended pipe is provided with a medicine outlet. The drencher also comprises a base. The cylinder is fixed on the base. The cylinder is provided with a medicine inlet pipe and a medicine outlet pipe. The medicine inlet pipe and the medicine outlet pipe are provided with valves. The position of the base, close to the medicine outlet pipe, is provided with a reel. The medicine outlet pipe is connected with a flexible pipe. The flexible pipe is coiled on the reel and is connected with the short pipe. The invention provides the anti-drop dairy cow drencher, so that shaking of the head of a dairy cow in drenching would not influence an operator to drench.

The invention discloses a paying-off device convenient to adjust for knitwear. The device comprises a support vertical plate, built-in plates, extension plates and bearings; front sliding grooves aresymmetrically formed in the front surface of the support vertical plate, one ends of the built-in plates are connected to the interiors of fixed plates, the extension plates are fixed to the other ends of the built-in plates through welding, connecting shafts installed on mounting blocks are in through connection with the connecting blocks, the bearings are fixed to the tops of the connecting blocks, rotating shafts are connected to the lower portions of first vertical rods, baffles are fixed to the lower portions of the outer sides of the first vertical rods, threaded cross bars are fixed tothe inner sides of the extension plates, threaded limit sleeves are arranged on the two sides of the mounting blocks, and built-in sliding blocks are fixed to the inner side walls of the fixed plates.According to the paying-off device convenient to adjust for the knitwear, the eight upper and lower mounting blocks can slide on the threaded cross bars to adjust the positions, then the mounting blocks can be staggered, and the line entanglement phenomenon is effectively avoided.