70results about How to "Improve stretching efficiency" patented technology

The production method of biaxial oriented hard polyvinyl chloride pipe material includes: using 100 portions of polyvinyl chloride, 2-6 portions of stabilizing agent, 1-12 portions of toughening agent, 0.1-1.5 portions of lubricating agent, 5-15 portions of filling material and proper quantity of colouring matter and adding them into a high-speed mixing machine, mixing them at 100-120 deg.C for 20-40 min., discharging, sieving, removing block and viscous melt material to obtain hard polyvinyl chloride premixed powder material, adding said mixture material into extrude single screw or extruder twin screw to make continuous forming at 100-180 deg.C, then making the obtained material undergo the processes of extruding pipe blank, stretching orientation, heating to 100-120 deg.C to implement radial expansion, forming, cooling, drawing and cutting.

The invention discloses a perpendicular stretching method and equipment for an optical fiber perform. The method comprises the steps that a large-diameter optical fiber perform is clamped, pretreatment starts to be performed on the optical fiber perform, and key parameter values in the stretching process are obtained in advance; then, an upper clamping device and a lower clamping device are controlled to synchronously rotate, the large-diameter optical fiber perform is heated to a semi-molten state through a heating device, an upward moving velocity V<3> is applied to the large-diameter optical fiber perform in the perpendicular direction through the upper clamping device, meanwhile, the heating device moves at an upward velocity V<2>, and the outer diameters obtained before and after stretching meet the relation V<3>*the square of D<1>=V<2>*(the square of D<1>-the square of D<2>). By means of the perpendicular stretching method and equipment for the optical fiber perform, the hysteretic nature in a common real-time feedback adjusting mode can be effectively avoided, the influence of the geometric dimension of the large-diameter optical fiber perform on a stretching result can be reduced to the maximum degree, the stretching control precision is improved, and the machining efficiency is further improved.

The invention relates to a preparation method of polyacrylonitrile-based high-strength high-modulus carbon fibers. After polyacrylonitrile (PAN) precursors are subjected to conventional pre-oxidationand low-temperature carbonization, the carbon crystalline orientation can be effectively controlled by increasing the high-temperature carbonization temperature and matching a certain stretching, or increasing the high-temperature carbonization stretching ratio to obtain high-temperature carbonized fibers with an orientation angle of being not greater than 17.5 degrees, and high-temperature graphitization hot drawing treatment is conducted at a relatively low temperature to obtain the high-strength high-modulus carbon fibers with tensile strength of 3.8-5.0 GPa and tensile modulus of 500-600 GPa. The preparation method reduces the requirements on equipment for high-temperature graphitization, which is beneficial to energy saving and cost reduction, and the operation is simple and easy.

A preform having an inverted truncated conical bottom section is used. The inclined inner surface of a bottle bottom surface-forming portion of the bottom section is formed into a gently curved convex surface that extends from the lower portion of a bottle bottom edge-forming portion of the bottom section to a curved portion in the lower portion of the bottom section so that the thickness of the bottle bottom surface-forming portion is greater than the thickness of the barrel section of the preform and the thickness of the bottle bottom edge-forming portion. The increase in thickness of the bottom section improves the efficiency of stretching the bottom section, and the circumferential wall of the bottom section can thereby be efficiently stretched. This allows a reduction in weight (thickness) of the bottom surface section of a stretch blow molded bottle, and a reduction in weight of the bottle is thereby achieved.

A drawing forming device for a honeycomb material comprises a rack and a control system, wherein a drawing platform, a driving mechanism, two guide rails, a fixed seat and a sliding seat are arranged on the rack; the fixed seat and the sliding seat are arranged on the two guide rails which are arranged on the drawing platform parallelly in a spaced manner; the fixed seat is fixedly arranged at one ends of the guide rails; the sliding seat is arranged on the guide rails in a sliding manner; the driving mechanism comprises a motor and a screw-nut pair, the motor is arranged on the rack on the side where the fixed seat is located, and the screw-nut pair is in driving connection with the motor; the driving mechanism is oppositely connected with the sliding seat so as to drive the sliding seat to slide back and forth along the guide rails; clamping structures are arranged on opposite side surfaces of the fixed seat and the sliding seat respectively. According to the technical scheme, the sliding seat is driven by the driving mechanism to be lowered and draw a honeycomb stacked block along the guide rails, the structure is impact and light, the operation is convenient, and the running is reliable. The honeycomb drawing quality and drawing efficiency are improved greatly.

The invention relates to an environment-friendly and energy-saving multi-stage combination type high-performance fiber hyperploid heat drawing device, which is characterized in that pre-drawing drying ovens and a plurality of drawing heat drying ovens are independently arranged in a closed heat preservation box; the upper parts of all the pre-drawing drying ovens and the drawing heat drying ovens which are arranged independently are all provided wit air exhaust devices; a pre-drawing machine is arranged in each pre-drawing drying oven; and a drawing machine is arranged in each drawing heat drying oven. The invention has the advantages of environmental protection, energy saving and high drawing efficiency and can reduce pernicious and hazardous gas emission by 95%, save the energy by 50%-75%, and improve the yield by 150%-300%; in addition, the fiber property intensity of the same primary raw silk can be improved greatly by the drawing means. The invention also has the advantages of low drawing multiple per stage, rare yarn break, less waste, low equipment manufacture cost, reliable performance as well as convenient maintenance and use.

The invention discloses a wear-resistant type strong-widening roller for strip steel and belongs to the field of narrow strip steel production equipment. A roller work layer adopts a high-chrome-molybdenum-vanadium-series alloy material which comprises 2.0-3.0% of C, 0.4-1.0% of Si, 0.6-1.0% of Mn, 8-32% of Cr, 0.8-1.8% of Ni, 0.8-2.0% of Mo and 0.2-1.2% of V; and the roller shape adopts a sine curve. The roller is used for a narrow strip steel rough rolling rack and has the effects of being high in strip steel blank forced widening efficiency and capable of eliminating loosening of steel blank centers and improving the plate quality; the roller has super-strong wear resistance, and thus the online time is 2-3 times that of a traditional NiCrMo roller; the roller has good characteristics of the hot cracking resistance and the fatigue weight losing resistance, the dismounted reconditioning restoration quantity of the roller is reduced by 40% compared with a traditional NiCrMo roller, and the plate face quality is obviously improved; and the comprehensive service life is prolonged to be three times or more that of the traditional roller, and the comprehensive ton-of-steel cost is reduced by 30%.

The invention provides a longitudinal drawing method of a two-directional drawn polyester film. The method comprises the following step: carrying out primary pre-heating, longitudinal drawing of a first section, primary cooling, secondary pre-heating, longitudinal drawing of a second section, longitudinal drawing of a third section and secondary cooling successively on an unextended sheet on a longitudinal drawing device, wherein the primary pre-heating temperature is 98-102 DEG C; the secondary pre-heating temperature is 108-112 DEG C; the primary cooling temperature is 28-32 DEG C; the secondary cooling temperature is 18-22 DEG C; the draw ratio of longitudinal drawing of the first section is 1.5-2.0 times and the drawing temperature is 115-120 DEG C, the draw ratio of longitudinal drawing of the second section is 1.5-1.8 times and the drawing temperature is 120-125 DEG C, and the draw ratio of longitudinal drawing of the third section is 1.5-2.0 times and the drawing temperature is125-130 DEG C. The invention also provides a longitudinal drawing device suitable for the method. The method has the advantage that the produced two-directional drawn polyester films are relatively good in thickness uniformity.

The invention contains two different lengths of highly nonlinear fibers. A standard single-mode fiber is welded between them and is taken as wide- band coherent source of pulse repetition frequency of WDM 40 GHz.

The invention discloses a transverse stretching mechanism for a polyimide film. The transverse stretching mechanism for the polyimide film comprises an imidization device, a stretching device and a preheating device. The imidization device and the preheating device are fixedly connected to the left side and the right side of the stretching device correspondingly. The imidization device, the stretching device and the preheating device are internally and correspondingly provided with two first film winding devices, two second film winding devices and two third film winding devices correspondingly. An infrared heating device is perpendicularly arranged at the bottom of the inner wall of the imidization device. The bottom of the inner wall of the stretching device is fixedly connected with a hot air heating device. The front side and the back side of the stretching device are both fixedly connected with heat preservation boards. The transverse stretching mechanism for the polyimide film has the advantages that two polyimide films are conveyed in the stretching device, during conveyance, heat on the front side and the back side of the stretching device can communicate with each other, so that heat loss can be reduced, and heat can be well utilized; and compared with original equipment, the stretching efficiency is improved by one time, and the stretching efficiency is improved.

The invention provides an off-line in-situ stretching device for an X-ray diffraction experiment. The device comprises a loading assembly which comprises a support and a stretching drive assembly, and a stretching assembly, wherein the stretching assembly is detachably arranged on the support, the stretching assembly comprises two stretching modules which are symmetrically arranged in the length direction, the two stretching modules are used for stretching a test piece, the test piece is fixed to the surfaces of the two stretching modules, and the stretching driving assembly is in driving connection with the two stretching modules; therefore, the two stretching modules synchronously move in the same direction or in the opposite directions. According to the device, a technical problem of in-situ stretching in the X-ray diffraction experiment can be solved.

The invention provides a cleaning system for a railway insulator, and a cleaning method. The cleaning system comprises a controller, a multi-axis robot installed on a railway inspection vehicle, a cleaning spray gun installed on the multi-axis robot, and a laser ranging array installed beside the railway inspection vehicle and located on the same side with an insulator supporting rod, wherein the laser ranging array comprises multiple ranging units arranged side by side; the multiple ranging units are used for respectively collecting ranging data between the railway inspection vehicle and the insulator supporting rod when the railway inspection vehicle moves, and sending the ranging data to the controller; and the controller is used for determining whether the railway inspection vehicle arrives at a target position which is a preset distance away from the insulator supporting rod or not according to the ranging data collected by the multiple ranging units, so that when the railway inspection vehicle is determined to arrive at the target position, the controller is used for controlling the cleaning spray gun on the multi-axis robot to spray and clean the corresponding insulator. According to the cleaning system for the railway insulator, and the cleaning method provided by the invention, the cleaning efficiency of the railway insulator can be improved.

The invention discloses a cable straightening device for communication engineering, and relates to the technical field of communication engineering. The cable straightening device comprises a rotatingroller, a base and clamping mechanisms, wherein the rotating roller is arranged at the upper end position of the inner side of the base, the four sets of clamping mechanisms are uniformly distributedon the two opposite inner sides of the rotating roller in the circumferential direction, and each set of clamping mechanisms is composed of two opposite clamping mechanisms; a through limiting grooveis formed in a bottom plate of the base; mounting plates are symmetrically arranged at the two ends of the outer wall of one side of the base, and an infrared emitter is fixedly mounted on the outerwall of one side, close to the rotating roller, of each mounting plate; and the outer surface of one side, close to the infrared emitters, of the rotating roller is provided with four infrared receivers which correspond to the clamping mechanisms in a one-to-one mode in the circumferential direction. According to the cable straightening device, a cable is straightened in the cable installation process, so that the straightening efficiency is high; and according to the device, the cable stretching degree can be monitored in real time, so that excessive straightening is avoided.

The invention provides a core cooling system of a pipe extruding mould. The core cooling system comprises a core mould arranged inside the extruding mould, wherein an extruding channel and a center cavity which are mutually independent are arranged on the core mould, a cold air pipe is arranged in the center cavity in a penetrating manner and comprises an inlet ventilator, a middle ventilator and an outlet ventilator, the inlet ventilator extends out of the outer part of the core mould, a heat insulation layer is arranged on the outer wall of the middle ventilator, a cooling channel is arranged at a position, close to the extruding channel, inside the core mould, one end of the cooling channel is connected with an external air inlet device, the other end of the cooling channel is connected with a hot air outlet, and the outlet ventilator is connected with the external air inlet device. By using the core cooling system of the pipe extruding mould, provided by the invention, the extruding speed and quality of a pipe are improved, the heat radiation condition of the mould is also improved, the environmental friendliness and low energy consumption are achieved, the cost is low, and the energy can be recycled.

The invention provides an auxiliary processing device for food. A guide sliding groove is formed in each inner support plate; each outer support plate is fixedly connected with a connection base provided with a cross rod A; the upper end of the front part of each outer support plate is fixedly connected with a cross rod B; a guide sliding block in one guide sliding groove is arranged at the lowerend of each strip-shaped vertical plate A and a strip-shaped hole A is formed in the upper part of each strip-shaped vertical plate A; the inner ends of each upper strip-shaped transverse plate and one corresponding lower strip-shaped transverse plate are hinged with the upper end and the lower end of one corresponding strip-shaped vertical plate A through one corresponding connecting rod A and one corresponding connecting rod B separately; the outer ends of each upper strip-shaped transverse plate and one corresponding lower strip-shaped transverse plate are hinged with the upper end and thelower end of one corresponding strip-shaped vertical plate B through one corresponding connecting rod C and one corresponding connecting rod D separately; the rear end of each dough pulling rod passesthrough one strip-shaped hole A and then is fixedly connected with one corresponding limiting block; one connecting rod X and one connecting rod Y which are hinged are connected with one corresponding limiting block and one corresponding connecting rod B separately; a rotating shaft A and a rotating shaft B at the centers of each fixed gear and one corresponding movable gear are hinged with two ends of one corresponding rocking bar A separately; one end of each rocking bar B is connected with one corresponding cross rod A and the middle part of each rocking bar B is connected with an eccentric rotating shaft C of one movable gear and hinged with one corresponding lower strip-shaped transverse plate through one corresponding connecting rod E; and two ends of each fixed connecting rod are connected with one cross rod A and the rear end of one corresponding rotating shaft A separately. The auxiliary processing device can assist operating personnel in making hand-pulled noodles.