47results about How to "Diameter stable" patented technology

The invention provides an apparatus and a method for producing microbubbles. Fluid in which gas is dissolved under pressure with a pump 1 flows into a porous plate unit 4 and when passing through the porous plate, the fluid is decompressed and dissolved gas is deposited to form microbubbles. A controller 3 changes rotational frequency of the pump 1 via an inverter 2 to control an ejection flow rate of microbubble-containing water 11. At the same time, the controller 3 changes the number of pores in a narrow flow passage via a driving gear 7 to keep pressurizing pressure above a minimum value of pressure required for producing microbubbles and below a predetermined maximum value.

A reinforcing bar binding machine is provided with: a guide tube for guiding a wire from a wire reel mounted on a binding machine body; a curl guide; a wire cutting mechanism disposed between the guide tube and the curl guide; a first guide pin that is disposed at an end portion of the guide tube or in a vicinity of the end portion of the guide tube, and guides an outer side surface which is an outer side of a wire curve; a second guide pin that is disposed at the end portion of the guide tube or in a vicinity of the end portion of the guide tube, and guides an inner side surface which is an inner side of the wire curve; and a third guide pin that is disposed inside of the curl guide and guides the outer side surface. The wire is brought into contact with the first guide pin, the second guide pin, and the third guide pin, when the wire is fed around a reinforcing bar.

The invention discloses a preparation method of a polylactic acid transparent straw. According to the preparation method, 94-96% of PLA, 2-3% of PEO, 1-2% of ParaloidKM-355P, 0.4-0.8% of VINNEX*2525 and 0.1-0.2% of EBS. The preparation method comprises the following steps of: adding the PLA into a double-screw extruder, adding the PEO, the ParaloidKM-355P, the VINNEX*2525 and the EBS into the double-screw extruder from a side feeding port, and carrying out extrusion, bracing, cooling, drying and slicing to obtain a modified resin for PLA straws, wherein a barrel temperature is 160 DEG C, a diehead temperature is 165 DEG C and a screw length-diameter ratio of the extruder is 52: 1; adding the obtained modified resin for PLA straws into a beverage straw manufacturing machine to carry out extrusion, traction, cooling and trimming so as to obtain a transparent a polylactic acid straight tube, wherein the barrel temperature is 160 DEG C, the die head is additionally provided with a melt pump, the die head temperature is 165 DEG C, and a cooling water temperature is 40-50 DEG C; and putting the transparent a polylactic acid straight tube into a full-automatic bendable straw forming machine to obtain a PLA high-transparency straw. According to the preparation method, the PLA application field is extended, traditional PP straws can be replaced so that the white pollution can be decreased, and the PLA is a natural bacteriostasis material and is beneficial for human health.

The invention provides a high temperature resistant optical fiber and a preparation method thereof. The high temperature resistant optical fiber comprises an optical fiber core layer, a cladding layerand a double-layer coating, wherein, the coating material of an inner coating is composed of an acrylate oligomer, 2-hydroxyl-2-methyl propiophenone, vinyl tri(2-methoxy ethoxyl) silane and (2,4,6-trimethyl benzoyl)diphenyl phosphine xide; an outer coating is a high temperature resistant acrylic resin outer coating. The high temperature resistant optical fiber still maintains the reliability of optical transmission at a high temperature environment of 150DEG C for a long time, optical fiber coating has no aging phenomena of yellowing and blackening. The method is simple. The optical fiber transmission loss of the high temperature resistant optical fiber prepared at the wiredrawing speed of 2000-2200m/min, the attenuation value of the optical fiber at 1550nm is not more than 0.25dB/km, theadditional attenuation value of the optical fiber at environment of 150DEG C for a long time is not more than 0.05dB/km.

The invention relates to a barium zirconate fiber and a method for preparing the same. The diameter of the barium zirconate fiber is 1-20 micrometers, and crystalline phases of the barium zirconate fiber are cubic phases and can keep stable under the condition of high temperatures of 1500 DEG C. The method includes proportionally sufficiently stirring basic zirconium carbonate, barium sources, acid sources and solvents under the condition of temperatures of 10-90 DEG C until solution is clear and transparent, and concentrating the solution under vacuum conditions to obtain barium zirconate precursor spinning solution; carrying out high-speed centrifugal thread throwing on the precursor spinning solution to obtain a diameter precursor fiber and carrying out high-temperature heat treatment on the diameter precursor fiber to obtain the barium zirconate fiber. The barium zirconate fiber and the method have the advantages of simple processes, low cost, high yield, environmental friendliness and the like. Besides, the barium zirconate fiber is reliable in quality, has the uniform diameter and has a broad application prospect in the field of high-temperature heat-insulation materials, high-temperature proton conductors, fuel batteries and the like.

FIELD OF THE INVENTION that present invention relate to the field of cable extrusion device control, in particular to a wire diameter automatic control device of a cable extruder, including extruders,cooling device, Coil-wire mechanism and control device, the extruder includes a base, A motor, a gear device and a barrel, wherein a screw is arranged in the barrel, the motor drives the screw to rotate through the gear device, an electromagnetic heating device is arranged on the barrel, the electromagnetic heating device is connected with a control device, the electromagnetic heating device is used for heating the barrel, and a first feeding mechanism, a second feeding mechanism and the like are respectively arranged on the barrel along the axial direction. The invention has simple structure, stabilizes cable diameter, ensures product quality, reduces waste of materials, reduces production cost of cable manufacturing industry, has perfect production assurance and fault handling capacity,realizes remote on-line monitoring of production process data, and improves automation degree of production equipment. The invention is simple in structure, has stable cable diameter, ensures productquality, reduces waste of materials, reduces production cost of cable manufacturing industry, and has perfect production assurance and fault handling ability.

The invention discloses a fusion electro-spinning jet flow excitation stability improving device. The improving device comprises a feeding needle cylinder for discharging fusion materials according to the preset feed amount, a jet flow needle head which is used for attracting the fusion materials discharged by the jet flow needle head and enabling the fusion materials to be condensed into a Taylor cone, and a printing plate which is arranged below the jet flow needle head and moves in a horizontal plane according to a preset path; the bottom of the printing plate is provided with a polar plate; the jet flow needle head has polarity, and the polarity of the polar plate is opposite to that of the jet flow needle head; and the printing plate is connected with the ground. In this way, as the fusion materials are fused in the feeding needle cylinder and discharged at first and then are attracted and condensed through the jet flow needle head, finally polarity is given to the fusion materials, and directional jet is conducted; thus, the process that the fusion materials are heated inside the jet flow needle heat in an electric heating mode is omitted, electric charge disturbance of the fusion materials at the tail end of the jet flow needle head is eliminated, and the diameter tends to be stable after jet flow is excited; and accordingly, the whipping phenomenon in the jet flow excitation process is weakened, and the accuracy degree of a jet flow drop point and the printing precision of a biological scaffold are improved.

The invention provides a method for acquiring asparagus homozygous diploid by culturing anther. The method comprises the following steps: acquiring asparagus anther, pre-treating the asparagus anther,performing callus induction for the asparagus anther, performing sub-generation differentiation for the asparagus anther, rooting a test-tube seedling, and multiplying haploid chromosome. By adoptingthe method for acquiring the asparagus homozygous diploid by culturing anther, the induction rate of callus with hard and compact texture of the asparagus anther is 7.2 to 17 percent; and the callusinduction rate of the variety ''champion'' with hard and compact texture is 15.8 to 17 percent or higher. According to the method for acquiring asparagus homozygous diploid by culturing anther, the haploid differentiation rate is 2.2 to 7.2 percent, the success rate for obtaining the homozygous diploid and multiploid by inducing the haploid is 45.86 to 49.73 percent, and the ratio of the homozygous diploid is 1.6 to 2.9 percent.

The invention discloses a forming method of a hard alloy bar with a spiral hole. According to the forming method, hard alloy powders and a polymer wire are used as raw materials, a hard alloy blank with the polymer wire is formed after the raw materials are extruded and molded through a screw, and the hard alloy bar with the spiral hole is obtained after the hard alloy blank is sintered. Accordingto the forming method, through cooperation of a screw extruder and a rotary die head, stable and continuous production of the hard alloy bars is achieved, and the diameter and number of the spiral holes on the hard alloy bar can be controlled through adjusting the diameter and the number of thread lines, so that it is ensured that the diameter and the spiral lifting angle of the spiral hole are stable.

The invention discloses a high-performance steel wire rope with a sisal hemp core. The high-performance steel wire rope with the sisal hemp core comprises a steel wire layer and the sisal hemp core,wherein a zinc layer is arranged on the outer wall of the steel wire layer; a composite layer is arranged on the side wall of the sisal hemp core in a twisting manner; the steel wire layer is arrangedon the outer wall of the composite layer in a twisting manner; and the sisal hemp core is formed by stranding three sisal hemp ropes. The formula of the composite layer comprises the following components by mass: 20-30 parts of phenolic resin, 20-30 parts of acrylic resin, 60-90 parts of poly (p-phenylene terephthalamide), 5-10 parts of graphite, 20-30 parts of nitrile rubber, 5-10 parts of metalsulfide and 10-15 parts of silicon carbide. The service life of the steel wire rope and the service life of the sisal hemp core can be prolonged, the sisal hemp core is protected, the corrosion resistance of the sisal hemp core is improved, and the strength of the steel wire rope is improved.

The invention discloses a sapling transplanting device. The sapling transplanting device comprises a handle, hand brake fixing blocks, hand brakes, a handle mounting block, a shell, a spring, a conical shovel, a guide plate, a hinge, traction ropes, a connecting ball, contraction ropes, a rope gathering plate, a shovel surface, a baffle, a T-shaped guide rail, a spring guide rail, a limiting plate and a T-shaped guide groove. The guide plate is welded to the shell, the conical shovel is assembled on the guide plate, one ends of the three traction ropes are connected with the conical shovel, and the other ends of the three traction ropes are connected with one end of the connecting ball through holes of the rope gathering plate; and the other end of the connecting ball is connected with the two contraction ropes, the other ends of the two contraction ropes are correspondingly connected with the two hand brakes, the hand brakes are rotationally connected with one ends of the hand brake fixing blocks, the other ends of the hand brake fixing blocks are coaxially connected with the handle in a fastening mode, the handle is fixed to the handle mounting block, and the handle mounting block is fixed to the shell. The sapling transplanting device has the advantages of being easy to operate, high in efficiency, low in cost, stable in diameter and depth of seedling root soil bags and suitable for saplings of different crown types.

A resistance spot welding device for welding at least two overlapping steel sheets held between a pair of welding electrodes is provided. The resistance spot welding device includes the pair of electrodes, an electrode force gauge that measures an electrode force, and a controller that controls an electric current supply to the electrodes according to the electrode force measured by the electrode force gauge. The controller controls the electric current such that the electrode force F measured by the electrode force gauge after the start of the electric current supply is adjusted to a prescribed value.