33results about How to "Improve wind performance" patented technology

The invention relates to a co-extruded, biaxially oriented polyester film consisting of a base layer and at least one outer layer. The film contains at least one flame-retardant agent, at least one UV-stabilizer and has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is substantially a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or polyethylene terephthalate copolymers, and component (II) is a polymer containing at least one sulphonate group.

The invention relates to a white, biaxially-oriented and coextruded polyester film which is matt on at least one side with at least one base layer B, which contains a cycloolefin copolymer (COC) in amounts of 4 to 60 wt. %, based on the weight of the base layer, in addition to polyester starting material. The glass transition temperature T_g of the COC lies in the range from 70 to 270° C. Said film has at least one matt outer layer (A), made from polyester and is particularly suitable for use in fast running machines such as winding, metallising, printing or laminating machines.

A method of manufacturing an annular concentric stranded bead cord, wherein, while rotating an annular core at a fixed position in a peripheral direction, a reel, upon which a lateral wire is wound, repeatedly performs a pendulum swinging movement and a perpendicular movement with respect to the annular core, thereby spirally winding the lateral wire upon the annular core to form a sheath layer. When forming the sheath layer, a fulcrum of the pendulum swinging movement of the reel is determined so that, with reference to a tangential line of a circle of the annular core passing through a winding point where the lateral wire is wound upon the annular core, the lateral wire is wound upon the winding point of the annular core within 15 degrees at a position above the tangential line and within a range of 55 degrees at a position below the tangential line.

The invention provides basalt fibers applied to an epoxy prepreg and a production method of the basalt fibers, and belongs to the technical field of fiber production. The production method comprises the following steps: A, pretreatment: grinding basalt ores into basalt ore powder for standby application, and during feeding of a furnace stage, adding a certain quantity of the basalt ore powder at regular intervals, so that the basalt ore powder added per hour corresponds to a flow of a leakage plate; B, wire drawing: setting the flow of the leakage plate to correspond to yield of the furnace stage to obtain the basalt fibers; C, immersion: immersing the basalt fibers obtained in the step B with an immersion agent; D, yarn drying: adopting a temperature curve to bake the immersed basalt fibers to enable the immersion agent to be adhered to the surfaces of the basalt fibers thoroughly; and E, winding: enabling a plurality of basalt fibers to be stranded. The basalt fibers provided by theinvention can be rapidly combined with epoxy resin, and also have good wire drawing performance, winding performance, weaving performance and stable linear density.

The invention provides a heating device applied to a scanning electron microscope. The device comprises a sample crucible, a heating core ceramic, an electric heating wire and a heat radiation shielding structure, wherein the sample crucible is placed on an upper end of the heating core ceramic, the electric heating wire is wound around a surface of the heating core ceramic in a double helical manner, the heating core ceramic is heated, and the electric heating wire is made of a doped tungsten filament; the heat radiation shielding structure comprises an internal stainless steel shielding layer, a secondary external stainless steel shielding layer, an external stainless steel shielding layer, an upper stainless steel shielding layer, a secondary upper stainless steel shielding layer and a shielding base seat; inter-layer space between the internal stainless steel shielding layer, the secondary external stainless steel shielding layer and the external stainless steel shielding layer is filled with vacuum; a diameter ratio between the above three layers is determined via a heat loss equation. The heating device provided in the invention is high in heating efficiency, small in size and good in shielding effects; a problem that a conventional heating device affects normal work of the scanning electron microscope is overcome.

The invention discloses a multilayer flexible circuit board and a preparation method thereof. The multilayer flexible circuit board comprises a first substrate layer, a second substrate layer, at least two conductive circuit layers and isolation layers, wherein the first substrate layer and the second substrate layer are oppositely arranged in parallel; the at least two conductive circuit layers are formed between the first substrate layer and the second substrate layer, the at least two conductive circuit layers are parallel to each other, and each conductive circuit layer comprises a plurality of conductive circuits arranged at intervals; and the isolation layer is arranged between each two adjacent conductive circuit layers, each isolation layer is provided with through holes so as to enable the conductive circuits at two sides of an isolation plate to be electrically connected through the corresponding through hole. According to the invention, a flexible thin film is adopted to serve as the first substrate layer, the second substrate layer and the isolation layers, the conductive circuits are prepared by adopting a graphic printing technology, and the multiple layers of the isolation plates are adhered through an adhesive layer, so that the multilayer flexible circuit board has the characteristics of high smoothness, good flexibility and thin thickness, is better in flexibility and thermal expansion performance and is applicable to flexible and thin type equipment.

The invention discloses a high-thermal stability robot arm torsion cable material. The high-thermal stability robot arm torsion cable material comprises the following raw materials by weight: 75-105 parts of a main material, 0.4-1 part of dicumyl peroxide, 0.5-1.2 parts of stearic acid, 1-2 parts of a coupling agent KH560, 10-20 parts of a sodium alginate compound, 35-45 parts of a nanocellulose whisker, 2-8 parts of calcium borate, 15-25 parts of hydrate calcium silicate, 5-15 parts of barium metaborate, 10-20 parts of anthracite, 0.5-1.5 parts of pine tar, 0.5-2 parts of oxidized polyethlenewax, 0.2-1 part of coumarone resin, and 0.6-2 parts of antiager. The thermal stability of the robot arm torsion cable material is good, the bending resistance and the tensile strength are high, the ageing resistance is quite excellent, and the service life of a cable is longer.

In a nozzle block (60), a first space (64), a second space (66), and a third space (67) are aligned from a first side toward a second side in a predetermined direction. The second space (66) is spread at a second inner surface tapered angle from the first side toward the second side. The third space (67) is spread at a third inner surface tapered angle greater than the second inner surface tapered angle from the first side toward the second side. A height (H1) of the first space (64) is a value greater than or equal to 3 mm and smaller than or equal to 8 mm. A height (H2) of the second space (66) is a value greater than or equal to 30% and smaller than or equal to 50% of a sum of the height (H2) and a height (H3) of the third space (67).

The invention provides an active pneumatic wing fence rod structure and a control method thereof, and relates to the technical field of large-span bridge wind vibration performance. The active pneumatic wing fence rod structure comprises a main beam, side handrails, pneumatic wing plates and a driving mechanism. The side handrails are arranged on the edges of the main beam, and a plurality of pneumatic wing plates are arranged between any two adjacent side handrails. The posture of the pneumatic wing plate can be adjusted in real time along with changes of the wind environment where the bridge is located and the vibration state of the main beam, so that the pneumatic lifting torque of the bridge is reduced, and the wind vibration performance of the bridge structure is improved. The control method comprises the following steps: setting a function of torsion motion of the main beam; deriving a function of torsional acceleration of the main beam from the function of torsional motion of the main beam; selecting the phase difference of motion between the pneumatic wing plates and the main beam and the amplification coefficient from the amplitude of the main beam to the amplitudes of the pneumatic wing plates as control parameters; exporting a torsional motion function form of the pneumatic wing plates; and controlling the rotation of the pneumatic wing plates according to the torsional motion function form of the pneumatic wing plates.

The invention relates to a steering lamp structure based on a flexible circuit board, wherein the flexible circuit board is arranged at the inner side, close the back side of a steering lamp, of a cover plate at the inner cavity of the lamp body of the steering lamp; the flexible circuit board is provided with a plurality of positioning holes; the cover plate is provided with positioning pins; each positioning pin corresponds to the corresponding positioning hole; the flexible circuit board is fixed through the matching between the positioning holes and the positioning pins; the top end of each positioning pin is provided with a sealed cover which is used for preventing the flexible circuit board from falling off; circuit elements are welded on the flexible circuit board; one end of the flexible circuit board is welded with an outgoing conducting line; the outgoing conducting line penetrates out through a small hole which is formed in a lamp housing of the steering lamp. The steering lamp structure based on the flexible circuit board has the advantages that the manufacture technology is simplified without reducing the luminous effect of the steering lamp, and meanwhile the production efficiency is also improved as long as the corresponding circuit elements are welded on the flexible circuit board, the flexible circuit board is arranged in the lamp body through the matching between the positioning holes and the positioning pins, and components, such as supporting strips, are unnecessary; moreover, the flexible circuit board has a good winding property, and the phenomena of disconnection and line falling can be avoided.

The invention provides a suona horn. The suona horn comprises a core, a tube body and a bowl body. The core and the bowl body are connected to the two ends of the pipe body respectively. The core, the pipe body and the bowl body are all of a radial through structure so as to achieve radial flowing of blowing airflow. At least one core through hole is formed in the side wall of the core. The invention further provides the core, and at least one core through hole is formed in the side wall of the core. According to the suona horn, the core through hole is formed in the core, so that the length of the air column in the suona horn is changed, the structure of the suona horn is optimized, a player can complete the over-blowing operation on the two holes in the uppermost portion of the pipe body, and then the player can complete various playing skills completed on the other six holes on the two holes under the over-blowing condition.

The invention relates to a host system of a large draw texturing machine, comprising a main frame, a false twister, yarn feeding roller mechanisms, and winding mechanisms. The false twister, one yarn feeding roller mechanism, the upper, middle and lower winding mechanisms and the other yarn feeding roller mechanism are mounted on the main frame sequentially from top to bottom. The host system of the large draw texturing machine of the invention has the following advantages: the structure is compact; the floor area is small; the production efficiency is high; the yarn tension is stable; the rollers are not easy to slip; the yarn is not easy to fall off; and the like.

The invention relates to a preparation method for an anti-knock environment-friendly cerium tungsten filament. The preparation method comprises the following steps: (1), choosing quadrate monoclinic ammonium paratungstate, and mingling an Al(NO3)3 solution, a K2SiO3 solution and a Co(NO3)2 solution, wherein the elements such as aluminum and cobalt can promote a potassium element into a tungsten matrix; (2), reducing temperature to 550 DEG C-660 DEG C in the first stage, and reducing the temperature to 610 DEG C-810 DEG C in the second stage; (3), after ignition, sieving mixed materials, sintering or performing high-temperature incipient fusion sintering for two times in a medium-frequency induction furnace; (4), preparing a finished product of a tungsten filament in a multi-machine cogging rotation calcination manner. The tungsten filament disclosed by the invention is good in an anti-knock property, high in finished product rate and long in service life and can be processed to phi 0.39 mm, and the preparation method can be widely used in the fields such as spaceflight, aviation, photoelectron, information technology engineering and illumination.

A method for realizing bypass connection of historical data includes carrying out over-threshold detection on historical data at regular time and positioning on time point of cutting off historical data based on historical data optimization policy to make recording number after said time point be equal to recording threshold of historical data if over-threshold of data is detected, carrying out said positioning regularly and deleting data before said cut-off point to dynamically control record number of data to be held near threshold constantly.