7results about How to "Reduce wire breakage" patented technology

The invention provides a polyacrylonitrile precursor, a carbon fiber and a preparation method thereof. The preparation method of the polyacrylonitrile precursor adopts wet spinning and comprises the steps of coagulating bath and hot water drafting, the hot water drafting at least comprises three times of hot water drafting, the swelling degree of the fiber after the second time of hot water drafting is 110-155%, and the total drafting multiplying power of the hot water drafting is 1.5-6.5 times. The modulus of the polyacrylonitrile precursor is 130 to 160 cN / dtex; the breaking strength of the polyacrylonitrile precursor is 5.80 cN / dtex to 6.50 cN / dtex; the average number of broken filaments per 10000 meters of the polyacrylonitrile precursor is not more than 15; the dispersion coefficient of the fineness of the polyacrylonitrile precursor is 3-5. The invention has the advantages of oil demulsification, less deterioration, high mechanical properties of the precursor, small fineness dispersion coefficient, and less broken filaments and broken filaments in a graphitization furnace.

The utility model relates to the technical field of control cables, in particular to an environment-friendly high-flame-retardant shielding control cable for special instruments, which comprises a plurality of mutually twisted control wire cores. The plurality of flame-retardant filling strips are filled in gaps among the control wire cores and are wrapped and fixed by a flame-retardant belt to form a cable core with a circular cross section; the outer wall of the cable core is coated with the composite shielding layer; and the outer sheath is extruded on the outer wall of the composite shielding layer. Through the combination of the copper strip shielding layer and the copper wire shielding layer in the composite shielding layer, respective advantages can be exerted on different frequency bands, a comprehensive shielding effect is provided, meanwhile, the elastic deformation space is increased by utilizing the convex structure of the copper strip, the overall flexibility of the cable is high, wiring in frequent bending and narrow space is facilitated, and the cable has a wide application prospect. And meanwhile, the aramid fiber braid layer is utilized to buffer and protect the copper wire braid layer, so that the probability that the copper wires are broken under the action of compression / tensile stress of the cable can be reduced, and the shielding performance of the cable is maintained.

The utility model provides an internal core structure of a humidifier, which relates to the technical field of internal core structures of humidifiers, and comprises a first buckle, a core shell arranged on one side of the first buckle, a second grating arranged on the surface of the core shell, a second buckle arranged on one side of the first buckle, and a second grating arranged on the surface of the second buckle. The surface, close to the moisture inlet and outlet, of the core shell is provided with the circular holes, the circular holes can effectively protect membrane filaments from being broken due to impact of high-flow-speed gas, it can be guaranteed that other membrane filaments enter the membrane filament bundle and fully flow on the outer surface, the grating is located outside the humidifier shell and can be conveniently cut off after being filled with pouring glue, and therefore the humidifying effect is good. Meanwhile, the circular holes can effectively disperse impact force of high-flow-speed gas, membrane filaments are prevented from being directly impacted by high-speed gas flow, therefore, the filament breaking phenomenon is reduced, normal work of the humidifier is guaranteed, the grating is located outside the humidifier shell and is convenient to cut off after being filled with glue, the production technology is simplified, the machining difficulty and cost are reduced, and the production efficiency is improved. And the production efficiency is improved.

This invention discloses a stranded electrode wire with a chip removal structure, a twisting device, and a twisting method. The stranded wire comprises two to seven monofilaments; the monofilaments are brass wire or copper-zinc alloy wire with a steel core; the two to seven monofilaments are first formed into a helical curvature matching the twist pitch through a pre-deformation mechanism, then twisted into a stranded wire blank, and finally drawn; after drawing, each monofilament retains the continuous helical shape formed by pre-deformation, and multiple monofilaments are tightly twisted together, forming continuous and equally deep helical grooves on the outer surface of the finished stranded wire; the helical grooves extend along the axial direction of the finished stranded wire, forming a continuous physical flow channel and chip-carrying space during electrical discharge cutting, resulting in a longer service life than traditional electrode wires, increased cutting speed, and effective reduction of wire breakage.

This utility model relates to the field of beet shredding blade technology, and in particular to a beet shredding blade and its manufacturing process. One end of the shredding blade is V-shaped and continuously arranged. The shredding blade includes a mounting plate and a shredding plate. The shredding blade is formed by bending the mounting plate and the shredding plate. The mounting plate has at least one fixing groove, and the shredding plate has continuously arranged V-shaped grooves. The end face of the shredding plate located at one end of the V-shaped groove has an angle A. The shredding blade has a simple structure and can be automatically sharpened during use. The hardness and strength of the shredding blade are increased by heat treatment. The angle of the blade head makes the shredding blade sharper after sharpening, and the shredded beet shreds are smooth and uniform in thickness. This can effectively improve the sugar filtration purity of the beet shreds during soaking, improve the purity, and reduce the breakage of the shreds.

This utility model discloses a yarn spreading device for unidirectional fabric production, including a tension control mechanism, a yarn spreading mechanism, a glue dipping mechanism, a glue extrusion mechanism, and a glue dipping tank. Arranged yarns pass sequentially through the tension control mechanism, the yarn spreading mechanism, the glue dipping mechanism, and the glue extrusion mechanism. The glue dipping tank is located below the glue extrusion mechanism and the glue dipping mechanism. The lower edges of the glue extrusion mechanism and the glue dipping mechanism are submerged in the glue dipping tank. The glue dipping mechanism includes multiple glue dipping rollers, which are driven rollers. The glue extrusion mechanism includes an upper glue extrusion roller and a lower glue extrusion roller. The lower glue extrusion roller is a speed-controllable driving roller, and the upper glue extrusion roller is a driven roller whose height can be manually adjusted in the vertical direction. The yarn spreading mechanism includes several fixed rollers and a first yarn spreading roller located at the foremost end. Supports are provided on both sides of the first yarn spreading roller, and rollers are mounted on the supports. The two sides of the first yarn spreading roller are fitted into the rollers. The surface of the first yarn spreading roller has multiple semi-circular protrusions. This invention, through the setting of the yarn spreading mechanism, enables the yarn to be fully spread before impregnation, thereby improving the uniformity of the surface density of the unidirectional fabric. The tension control mechanism can set different spreading tension according to the breaking strength of the yarn, reducing the problem of yarn breakage during the production process.

The utility model relates to the technical field of steel cord production, in particular to a steel cord water bath quenching device which comprises a quenching liquid pool, and the interior of the quenching liquid pool is used for containing quenching liquid. The quenching circulating tank is arranged above the quenching liquid pool, and the quenching circulating tank is provided with a plurality of quenching tanks through which steel wires penetrate; the motor is connected to the quenching circulating tank and is used for pumping the quenching liquid in the quenching liquid pool into the quenching tank, so that the steel wire penetrating through the quenching tank is submerged by the quenching liquid; a water bath quenching device for steel cords is provided with a heat shield body. The motor heat insulation device is simple in structure, beneficial to being separated from and put into a quenching production process and good in flexibility, and when the motor heat insulation device covers the motor, a heat barrier can be effectively formed for the motor, and heat generated by quenching is prevented from directly influencing operation of the motor, so that the service life of the motor is prolonged, the failure rate is reduced, and the production efficiency is improved. And the risk of quenching interruption is also reduced, wire breakage can be effectively reduced, and the yield is improved.