67results about How to "Large shrinkage" patented technology

The invention belongs to the field of metallurgy casting and especially relates to a preparation method of boron-containing steel preventing casting blank corner cracking. The method successively includes the steps of pretreatment to molten iron, converter smelting, external-furnace refining, continuous casting of steel blank, re-heating of a plate blank, and hot continuous rolling. The boron-containing steel includes the following components, by mass: 0.17-0.18% of C, 0.02-0.20% of Si, 0.23-1.26% of Mn, less than 0.017% of P, less than 0.014% of S, less than 0.0052% of N, 0.0005-0.0010% of B, 0.015-0.034% of Al and the balanced being Fe. During the external-furnace refining process, titanium is added according to the mass percentage ratio of 0.01-0.035%. The titanium is added to the hot-rolled boron-containing steel, so that the quality of the casting blank is significantly improved and the offline cleaning rate is reduced to 15.06%. A statistical result proves that defect rate is reduced to 1.39%. In addition, a detection and analysis result on mechanical performance of the boron-containing steel proves that the mechanical performance of the boron-containing steel is improved after the titanium is added.

An X-ray opaque filament is provided, which is constituted of a filament formed of a thermoplastic resin containing an X-ray opaque agent and has a dry heat shrinkage of 3.5 to 0% at 130° C. An X-ray opaque covered filament is provided, which is formed by covering the periphery of the X-ray opaque filament with a covering fiber. Furthermore, an X-ray opaque filament is provided, which is constituted of a fiber formed of a thermoplastic resin containing an X-ray opaque agent and has an oil containing an ionic surfactant in a ratio of 0 to 10% by mass added thereto. An X-ray opaque covered filament is provided, which has a covering fiber formed of a thermoplastic resin having a lower melting point than the thermoplastic resin constituting the X-ray opaque filament. A fiber structure is provided which includes the X-ray opaque filament and/or the X-ray opaque covered filament.

The invention provides a method for reducing longitudinal division of a weather-proof steel continuously cast slab. The control performed in a technological process is that casting is performed at a low molten steel superheat degree and a higher slab pulling rate, wherein the temperature of cooling water at an inlet of a crystallizer is improved in a casting process, and the taper of the crystallizer is increased; the alkalinity of covering slag is improved to be within a range of 1.40-1.50; the viscosity eta of the covering slag is reduced to be within the range of 0.70-0.80 at the temperature of 1,300 DEG C. According to the method for reducing the longitudinal division of the weather-proof steel continuously cast slab, the longitudinal division of the weather-proof steel continuously cast slab can be reduced to be below 0.82 percent from 2.75 percent, and considerable economic benefit can be achieved.

The invention relates to a liner oil pipe and its manufacturing process, including oil pipe, liner pipe and oil pipe collar; the two ends of the oil pipe are provided with external thread structures, the two ends of the oil pipe collar are provided with internal thread structures, and the adjacent oil pipes pass through the oil pipe Coupling threaded connection; the oil pipe has a built-in liner pipe, and the inner liner pipe is flanged along the radial direction of the oil pipe at the nozzle of the oil pipe to form a flanged nozzle, and a guide cone is set on the outer surface of the flanged nozzle; by using raw materials Stirring, extrusion molding, oven preheating, interference fit, high temperature heating, lining flanging, ring cutting, end plug anti-shrinkage; eight steps to complete the production of lined oil pipes; adopt heat setting process to simulate lined oil pipes The temperature of underground oil extraction is fixed and installed, which avoids the situation that the inner liner extends out of the oil pipe due to the large expansion of the inner liner due to the temperature rise, which accelerates the wear and distortion of the inner liner, and improves the service life of the inner liner.

The invention discloses finger movement function rehabilitation apparatus driven by shape memory alloy wires, and belongs to the field of finger rehabilitation. The apparatus is composed of the shapememory alloy wires, ropes, an alloy wire connecting terminal, an inner-layer fabric, an outer-layer fabric, range extending mechanism supports, rings, and other parts. When the shape memory alloy wires are powered on, the temperature rises under the current heat effect to generate phase changes, the contraction is generated, then the ropes are pulled, and fingers are driven to bend and stretch. The fabrics on the inner layer and the outer layer have good elasticity, and the tightness degree of the whole fabric can be adjusted in cooperation with Velcro on an arm. In addition, a proper amount of silica gel is placed between each layer of fabric to improve the wearing comfort of the apparatus. A length of the alloy wires extending out of the connecting terminal at the tail end is adjusted toadapt to different finger lengths, so that the requirement of ergonomics is better met. The three Velcro are located on the wrist, the forearm close to the elbow, and the big arm close to the elbow respectively. The three Velcro can enable the rehabilitation apparatus to be better attached to the shape of the arm of the human body, so that range extending mechanisms more efficiently use the phasechange contraction of the SMA wires to drive the fingers to bend and stretch, and thereby the better rehabilitation effect is achieved.

The present invention provides an aqueous composition for recording medium in a form of aqueous dispersion solution comprising a polyvinyl alcohol-based resin (A) having an average saponification degree of 80-89 mol % and an average polymerization degree of 1700-3500, and containing a polyvinyl alcohol having 1,2-diol structural unit on a side chain thereof, represented by a general formula (1); an inorganic microparticle (B); and a boron compound (C). The aqueous composition of the present invention is not likely to become gel and therefore exhibit excellent preservation stability. Furthermore, the aqueous composition provides a recording layer serving as an ink receiving layer/glossy layer satisfied with gloss, ink absorbency, and water resistance. Accordingly, the present invention may also provide an ink-jet recording medium satisfying surface gloss by forming a coating layer of the inventive aqueous composition on a substrate, even when the substrate has water resistance.

The invention discloses a green tea processing method and belongs to the technical field of tea processing. The green tea processing method includes the steps of spreading and cooling, water removing, dehumidifying, twisting, strip making, shaping, drying and aroma extracting. The moisture content of tea leaves subjected to spreading and cooling ranges from 55% to 63%, and the temperature during strip making ranges from 300DEG C to 400DEG C. Color of the tea leaves is favorably sustained by reducing the moisture content of the tea leaves after spreading and cooling, and the color of the tea leaves is enabled to be bright green; through dehumidification of an fan additionally mounted at an outlet of an enzyme deactivation machine, the color of the tea leaves subjected to enzyme deactivation is bright green; the tea leaves are enabled to have stronger aroma and are more tasty by raising the temperature in strip making, and bar molding is performed after fluff removing during strip making, so that the processed tea leaves are more rich in luster and better in integrity; the stripped leaves are returned to be shaped by the enzyme deactivation machine after strip making, the shrinkage degree of the tea leaves is increased, tea leaves are more compact and tiny, and the aroma of the tea leaves is stronger; during aroma extracting, two stages are performed, so that the processed tea leaves are better in appearance and tasty.

The invention provides a cartialgenous and angelica wine which achieves the purpose of beautifying by tonifying the kidney and nourishing the blood. In order to achieve the purpose, the technical scheme is adopted in the invention as follows: the active ingredient is prepared from the following raw materials in parts by weight: 10-30 parts of cartialgenous, 10-30 parts of angelica, 10-30 parts ofginseng, 10-30 parts of Arillus Longan, 10-30 parts of wolfberry fruit, 10-30 parts of chrysanthemum and 800-2400 parts of white spirit of 30-50 degrees. A corresponding preparation method is adopted. The cartialgenous and angelica wine has the effects on tonifying the kidney, nourishing the blood, maintaining beauty and keeping young.

The invention provides an electric type power steering device which belongs to the technical field of vehicles. The invention solves the problems of longer integral size, difficult distribution of the whole chassis and worse safe performance of the traditional electric type power steering device. The electric type power steering device comprises an electric steering mechanism, a sensor shaft and an upper shaft, wherein the electric steering mechanism is provided with an output shaft; the upper end of the sensor shaft is connected with the output shaft; the lower end of the sensor shaft is connected with the upper end of the upper shaft; the side part of the upper shaft is provided with a locking hole in which a locking pin can be inserted; and the output shaft is connected with the upper shaft by an axial positioning structure, and the sensor shaft and the upper shaft can rotate by the drive of the output shaft. When the axial acting force exerted by the axial positioning structure islarger than a set value, the axial positioning structure is invalid and enables the lower end part of the sensor shaft and the lower end part of the upper shaft to be axially abutted, and the lower end part of the sensor shaft at least can reach the locking hole. The invention has the advantages of compact structure, easy installation and distribution, stable and reliable working performance, long service life and high safety factor.

The invention discloses a high-necking end cap and a machining die thereof. The high-necking end cap is provided with a first necking, a second necking and a through hole. The machining die of the high-necking end cap is provided with an upper die holder, an upper die plate, an upper pad, a stop plate, springs, a piercing punch, an upper die drawing punch, a stripper plate, a lower die plate, a lower clamping plate, a lower pad, a lower die holder, a lower table, lower die UV(ultraviolet) adhesives and a lower die drawing punch. The necking quantity of the high-necking end cap is large, and the necking diameter can be larger than the necking quantity. The machining die can be used for completing necking at one step, and the situation of completing necking by multiple steps in the prior art is changed. Spring stress is replaced by elastic UV adhesives on the lower die of the machining die, stress in machining of the high-necking end cap is controlled precisely, the necking size is controlled accurately, excessive machining is avoided, defect of cracking is eliminated, quality of products is stable, production efficiency is high and production cost is low.

The invention relates to the technical field of printing, and particularly discloses a color printing printing ink supply device. The color printing printing ink supply device comprises a printing inkbox body and a stirring shaft. The stirring shaft penetrates through the printing ink box body, and stirring blades located in the printing ink box body are arranged on the stirring shaft. A cylinderbody is arranged below the printing ink box body, a piston only capable of sliding in the vertical direction is arranged in the cylinder body, and a cylindrical cam structure is formed by the stirring shaft and the piston. An air inflow one-way valve and an air exhaust one-way valve are arranged on the cylinder body, and an air exhaust port of the air exhaust one-way valve is communicated with the bottom of the printing ink box body. A mesh plate located below the stirring blades is arranged in the printing ink box body, the stirring shaft penetrates through the mesh plate, and the mesh platecan slide up and down relative to the stirring shaft. A printing ink passageway is formed in the stirring shaft, and the lower end of the printing ink passageway is communicated with a spray nozzle.A rubber bag communicated with the printing ink passageway is arranged below the stirring blades, the mesh plate moves up and down to extrude the rubber bag, a liquid drainage one-way valve is arranged in the printing ink passageway, a liquid inflow one-way valve is arranged on the side wall of the stirring shaft, and the concentration of printing ink can be uniform under the effects of stirring of the stirring blades and bubbles.

An object of the present invention is to provide a chain drive system that can reduce sliding resistance between a chain and a guide shoe, minimize increase of sliding resistance over time, and reduce production cost. Provided is a chain drive system 100 including a plurality of sprockets 101 and 102 over which a chain 130 passes over, and one or more guides 110 and 120 that guide the chain 130. The guides 110 and 120 include integral or separate guide shoes 111 and 121 each having a chain running surface. The chain running surfaces include, in part thereof, a lubricated area 114 where a solid lubricant P is held.

The invention is used to solve the issues of the reagent being vaporized and the air being polluted in the procedure for ultrasonic processing the tissue. The new method and device for preparing the paraffin section of tissues are as follows. According to the conventionality, the pathologic sample is taken. By using the ultrasonic device for treating tissues and the tissue ultrasonic treating equipment made by the inventor myself, the tissue to be examined is carried out the following treatments. These treatments are that less than ten minutes treatment by the solution of acetone glacial acetic acid; less than ten minutes treatment by the waxdip; the ultrasonic treatment at temperature less than 90 deg.C. Two steps: embedding and slicing as well as dyeing and tissue treatment needs 10 minutes to finish.

Provided are a vehicle seat member in which even when a foamed resin molded body forming the vehicle seat member shrinks after being demolded, influence of the shrinkage behavior on a frame member embedded in the foamed resin molded body can be prevented, and thus a change in the position of a protrusion, which serves as a part to be anchored to a vehicle body, of the frame member can be prevented, whereby the vehicle seat member can be attached to the vehicle body side easily and reliably, and a vehicle seat including such a vehicle seat member. A vehicle seat member includes a foamed resin molded body and a frame member integrally formed therewith, the frame member including a body portion embedded in the foamed resin molded body and protrusions each protruding from the body portion and having a tip end protruding outward from the foamed resin molded body.

The invention discloses a 21-subunit cardoxin derivant and preparing method, which contains gamma-subunit butane lactone as structural unit as formula. The making method is convenient without protecting, which possesses potential drug using value.

A contraction type actuator 10 is provided which can efficiently and evenly apply a bias magnetic field to a magnetostrictive rod to obtain a large contraction amount, while having a small and simple structure.

In the contraction type actuator 10, a giant magnetostrictive rod 12 flexibly expands and contracts by controlling the strength of a magnetic field applied by a magnet coil 14. A bias magnet comprises a first bias magnet 16 and a second bias magnet 18. The fist bias magnet 16 in an approximately cylindrical shape is coaxially disposed around the giant magnetostrictive rod 12. The second bias magnet 18 is disposed in the inner space 16A of the first bias magnet 16, and is polarized in the direction of drawing a part of a magnetic field generated by the first bias magnet 16 into the inner space 16A.

The invention provides a valve bridge guide rod with exhaust passages. The valve bridge guide rod comprises a guide rod body, wherein one end of the guide rod body is in sliding connection with a valve bridge, and the other end of the guide rod body is fixedly connected with a cylinder cover; the bottom end of the guide rod body is also provided with the first exhaust passage and the second exhaust passage; the axis of the first exhaust passage is located on the central axis of the guide rod body, and the second exhaust passage communicates with the upper end of the first exhaust passage; andthe axis of the second exhaust passage is perpendicular to the axis of the first exhaust passage. According to the valve bridge guide rod with the exhaust passages, the exhaust passages are additionally arranged and used for exhausting air in a mounting hole, so that the valve bridge guide rod is pressed in place accurately; and due to the existence of the exhaust passages, the contraction amountof the bottom is increased, and press mounting is convenient.

The invention relates to a summer sleeping mat fabric with no harms to human bodies. The summer sleeping mat fabric comprises a bottom layer (1), wherein a fixed layer (2) and an outer layer (3) are arranged at the outer part of the bottom layer in sequence; the outer layer (3) adopts an ultrahigh molecular weight polyethylene adhesive coating. A lining fabric layer is arranged on the back surfaceof the bottom layer; the lining fabric layer is formed by sinking and floating interweaving of warp yarns and weft yarns; the warp yarns and the weft yarns adopt 20D/50S modal-coated polyester yarns;the warp yarns and the weft yarns are interwoven at intervals in a one-up and one-down manner to form plain weaves. According to the summer sleeping mat fabric provided by the invention, the elasticity and the strength are increased; the hand feeling and the size stability are improved. The summer sleeping mat fabric provided by the invention has no harms to the human bodies.