65results about How to "Guaranteed stretching effect" patented technology

The invention relates to X80 and below steel grade pipeline steel for a deep-sea drilling marine riser which comprises the chemical components in percentages by mass: 0.04-0.08% of C, 1.7-1.85% of Mn, 0.25-0.45% of Si, less than or equal to 0.001% of S, less than or equal to 0.010% of P, 0.02-0.04% of Nb, 0.008-0.03% of Ti, 0.01-0.06% of V, less than or equal to 0.06% of Alt, less than or equal to 0.010% of N, less than or equal to 0.006% of O, less than or equal to 0.30% of Mo, less than or equal to 0.30% of Cu, 0.15-0.35% of Ni, 0.15-0.45% of Cr, less than or equal to 0.01% of Ca and the balance of Fe and inevitable impurities. A steel plate smelting process route is as follows: material preparation; converter or electric furnace smelting; external refining; continuous casting; slab reheating; special TMCP process; and air cooling to room temperature. The steel provided by the invention can obviously improve the mechanical property of the deep-sea drilling marine riser.

The invention relates to the field of steel making, in particular to a heat treatment production method of a steel rail for a mixed passenger and freight traffic railway and the steel rail obtained by the method. The method includes the steps that the railhead tread center, the two sides of a railhead and the rail base center of the steel rail obtained after rolling are sequentially subjected to accelerated cooling, slow cooling and air cooling; the starting cooling temperature of accelerated cooling is 650-950 DEG C, the cooling speed is 2.5-7 DEG C/s, and the final cooling temperature is 400-600 DEG C; the cooling speed of slow cooling is 0.1-1.5 DEG C/s, and the final cooling temperature is 180-300 DEG C. The steel rail comprises, by weight, 0.71%-0.82% of C, 0.13%-0.60% of Si, 0.65%-1.25% of Mn, 0.05%-0.25% of Cr, 0-0.1% of Al, 0-0.025% of P, 0-0.025% of S and 97.01%-98.46% of Fe. By the adoption of the method, hardness of the steel rail can be controlled within the appropriate range of 350-380 suitable for the mixed passenger and freight traffic railway under the premise of guaranteeing the tensile property of the steel rail.

The invention discloses an easy-to-tear type polypropylene packing bag and a manufacturing method thereof. The packing bag comprises a heat-seal layer which is made of polypropylene film through one-way orientation stretching. The manufacturing method comprises the following steps: firstly, polypropylene film which meets sanitary requirements is taken as the material, and one-way orientation stretching is performed to the polypropylene film after the polypropylene film is heated to 100 to 600 DEG C, and the stretch ratio is 1.1 to 5; secondly, temperature reduction treatment performed to the film which is processed through orientation stretching, concretely the temperature of the film which is processed through orientation stretching is quenched to the environment temperature; thirdly, corona treatment is performed to the film which is stretched, to ensure the surface tension of the film to be larger than 38 dynes, thereby a shaped easy-to-tear type polypropylene packing film is obtained, and is rolled; fourthly, the film is superposed on a required additional layer to obtain the wall layer of the packing bag, namely, a composite layer structure; and fifthly, the wall layer is folded and a plurality sides are sealed to form a bag shape with an opening to obtain a finished packing bag. When the packing bag is torn along the stretching direction of the heat-seal layer, the opening is in a straight-line shape.

The invention belongs to the field of high polymer materials, and particularly relates to a super-hydrophobic water-proof moisture-permeable nanometer fiber material and a preparation method thereof.The super-hydrophobic water-proof moisture-permeable nanometer fiber material is prepared from super-hydrophobic electrospinning nanometer fibers of a three-dimensional through porous structure through mutually staggered arrangement, wherein the super-hydrophobic electrospinning nanometer fibers are a blend of polystyrene, polyurethane and a hydrophobe modified silicon dioxide. The preparation method comprises the steps that the polystyrene, the polyurethane and the hydrophobe modified silicon dioxide are uniformly dispersed into an organic solvent to form a spinning solution, and preparationis conducted through electrospinning. The fiber film is small in diameter, interfiber pores are small, the porosity is high, the moisture permeable flux is high, the water-proof performance is improved, the moisture permeable performance is improved, and the super-hydrophobic water-proof moisture-permeable nanometer fiber material has wide application prospects in the outdoor and protective fields.

The present invention discloses one kind of closed permeating waterproof fruit film bag. The polyolefin film bag is prepared with LDPE polyolefin resin, LLDPE polyolefin resin or PP-polyolefin copolymer resin, calcium carbonate or talcum powder, coupler, modifier and dispersant as materials in a special plastic film bag making machine. It is provided with one tying rope in the mouth.

The invention discloses an ionic flexible touch sensor. A sensor comprises a plurality of conducting layers, a plurality of insulating layers and two packaging layers. The mutiple conducting layers are arranged in a laminated manner. One insulating layer is arranged between every two conducting layers in a laminated manner and the two packaging layers are respectively packaged on the upper surfaceand the lower surface of the conducting layers arranged in the laminated manner; wherein the conductive layer is made of an ionic conductive flexible gel material, and the insulating layer and the packaging layer are respectively made of an insulating high-molecular polymer material. The ionic flexible touch sensor can be integrated with a contact position measurement module and a contact pressure/tensile force detection module. A complete set of complete structural design and manufacturing technical solution of the ionic flexible touch sensor is provided, and a product has the advantages ofhigh optical transparency, deep flexibility, low manufacturing cost, high position measurement resolution, high sensitivity and the like.

The invention discloses a method for preparing a large-specification thin-composite-layer nickel-based alloy and pipeline steel composite plate. The method comprises the following steps that 1, a nickel-based alloy plate serving as a composite layer and a pipeline steel plate serving as a base layer are composited to prepare composite board blank through explosion welding; 2, a leveling treatment is carried out on the composite board blank, and then a heating treatment is carried out on the composite board blank; 3, a cooling treatment is carried out on the heated composite board blank; and 4, the composite board blank which is subjected to the cooling treatment is fed into an asynchronous rolling mill for asynchronous rolling to obtain the nickel-based alloy and pipeline steel composite plate, wherein the shearing strength of the nickel-based alloy and pipeline steel composite board is not less than 210 MPa, the total rolling reduction ratio of asymmetrical rolling is 50%-90%, and the different speed ratio of each pass of the asynchronous rolling mill is 1.05-1.30. According to the method for preparing the composite plate, the corrosion resistance of the nickel-based alloy plate serving as the composite layer is ensured, and the tensile property and the impact toughness of the pipeline steel plate serving as the base layer are ensured; and the bonding strength and other properties of the composite plate can meet the requirements specified in the NB/T47002.2 standard, and even the requirement for rolling force of the rolling mill is reduced.

The invention belongs to the technical field of tension devices, and particularly relates to a hardware plate tension device. The hardware plate tension device comprises an empty box, a stepping motorand a controller, wherein a No.1 air cylinder, a No.1 air bag, a No.2 air cylinder, a hollow cavity, a No.2 air bag, a No.3 air cylinder and an impact cabin are arranged in the hollow cavity. The hardware plate tension device has the advantages that under the cooperation of the No.1 air bag and the No.1 air cylinder, the cooperation of the hollow cavity and the No.2 air cylinder, as well as the cooperation of the No.2 air bag and the No.3 air cylinder, and arranging the impact cabin, a hardware plate can be well pressed, and the tension effect of the hardware plate is guaranteed; while the hardware plate is tensioned, the hardware plate can be continuously impacted for multiple times by the impact cabin, so as to completely eliminate the internal stress of the hardware plate.

The invention provides a film bidirectional accurate stretching device. The device comprises a first driving motor, a transverse stretching mechanism, a longitudinal stretching mechanism and a tensionsensor, wherein the transverse stretching mechanism and the longitudinal stretching mechanism are horizontally and vertically arranged, each of the transverse stretching mechanism and the longitudinal stretching mechanism comprises a strip-pressing stretching mechanism and a plurality of point-pressing stretching mechanisms, the point-pressing stretching mechanisms are in relative sliding connection with the strip-pressing stretching mechanisms, the strip-pressing stretching mechanism of the transverse stretching mechanism and the point-pressing stretching mechanisms of the longitudinal stretching mechanism correspond to each other at the same time to act, and the point-pressing stretching mechanisms of the transverse stretching mechanism and the strip-pressing stretching mechanism of thelongitudinal stretching mechanism correspond to each other at the same time to act. According to the device, in the single-direction stretching operation, the defects that a stretched film is wide intwo ends and narrow in middle are avoided, the overall shape of the stretched film is preliminarily ensured, the stretching effect is guaranteed, the tensile thin degree is uniform, and the defect that the stretching point is uneven in thickness due to fixed point stretching by adopting point-pressing fixation in the prior art is avoided.

The invention provides a Ti-Ni based shape memory alloy vacuum electron beam connecting technology. Concretely, vacuum electron beams are used for achieving connection of Ti-Ni-X alloy, wherein X can be Nb, Mo, Cu, Hf and the like. An existing connecting mode of Ti-Ni based shape memory alloy has the problems of being low in weld strength, thick and big in grain structure, prone to generating cracks and the like. The electron beams which are strong in penetrating power, high in energy transformation ratio and good in controllability are adopted as a welding hot source, therefore, time of the whole connecting process is shortened, a heat affected zone is reduced, weld defects are reduced, moreover, narrow weld seams can be obtained (the width is smaller than 1mm), mechanical performance and the memory effect of welded material are ensured to the maximum extent, after parameter optimization, the strength of a electron beam welding connector can reach over 75% that of parent material, and the memory effect can reach over 85% that of the parent material.

The invention relates to the technical field of films, particularly to a high-tensile composite film and a preparation method thereof. The high-tensile composite film is formed by compounding seven layers of thin films and has a thickness of 15-23 microns, wherein each layer of thin film contains metallocene polypropylene and general-purpose polyethylene in a certain ratio, corresponding auxiliaries are cooperatively utilized, and thin film melting, melt pressing, casting melt curing and primary product slitting are conducted to prepare the high-tensile composite film. The tensile length of the prepared composite film can reach 5 times of the original length, so the composite film has excellent tensile strength and tensile property; and the possibility of breakage of the composite film inthe packaging process is effectively reduced.

The invention discloses a method for manufacturing an easy-to-tear type polypropylene packaging film. The method comprises the following steps: (1) taking a polypropylene thin film meeting the sanitary requirement as a raw material, stretching in a single direction, and specifically, heating the polypropylene thin film to 100DEG C to 160 DEG C, with the stretching ratio being 1.1 to 5, so as to obtain a film material after the positioning stretching; and (2) conducting the temperature reduction treatment for the film material after the positioning stretching, specifically reducing the temperature of the film material after the positioning stretching to the environmental temperature. A packaging bag manufactured through the invention has the advantages of easy tearing, and smooth tearing part, when the packaging bag is torn in the stretching direction.

The invention discloses a flame-retardant filling rope, which is composed of polypropylene resin, defoaming agent, and flame-retardant masterbatch in a weight ratio of 25:1:1. Since polypropylene resin and flame retardant masterbatch are used as raw materials, on the basis of ensuring tensile properties, the elongation rate is kept greater than 10%, and the flame retardant effect is improved. The oxygen index is greater than 28, and it will not burn in case of fire. The smoke produced when burning is small.

The invention relates to a packaging film and discloses a thin packaging film with a high tensile property and a preparation method thereof. The problem that the stretching ratio is greatly reduced after a conventional packaging film is thinned is solved in the invention. The thin packaging film is a co-extruded seven-layer composite film with a thickness of 10-12 microns; the seven-layer composite film comprises a first layer, a second layer, a third layer, a fourth layer, a fifth layer, a sixth layer and a seventh layer from one side to the other side with a cross section as a starting point; the seven film layers take metallocene linear low-density polyethylene as a matrix; maleic anhydride and tannin phenolic compounds are mixed into the second layer and the sixth layer so as to improve the binding force between the second and sixth layers and the film layers at the two corresponding sides and improve the toughness of the film layers, so change difference values of the two sides ofthe first and seventh layers located out of the second and sixth layers and the third, fourth and fifth layers located between the second and sixth layers in the stretching process are alleviated, and the layered fracture of the packaging film is delayed; and thus, the original stretching ratio and tension of the packaging film are maintained on the basis of thinning of the packaging film.

The invention relates to a low-density honeycomb plate sandwich manufacturing and stretching forming device and a treatment method thereof. The forming device comprises a bearing table, a stretching limiting mechanism arranged on the bearing table, a stretching driving mechanism arranged on the bearing table and a pair of stretching clamping mechanisms arranged on the stretching driving mechanism,wherein the bearing table comprises two vertical side plates and a horizontal bearing plate positioned between the two side plates; the pair of stretching clamping mechanisms are arranged in a mirrorsymmetry mode relative to the symmetrical surfaces of the two side plates; the pair of stretching clamping mechanisms are positioned above the bearing plate; the stretching driving mechanism can drive the pair of stretching clamping mechanisms to move in the opposite direction or in the opposite direction; and the stretching limiting mechanism is used for limiting the distance between the pair ofstretching clamping mechanisms moving in the opposite direction. According to the forming device, limiting stretching can be realized, the stretching effect is good, the stretching is ensured to reach a preset stretching amount, and the stretching deformation is prevented.

The invention relates to the field of garment processing, in particular to garment processing equipment. The equipment comprises a fixed base, an unfolding and folding synchronous driver, two unfolding and folding distance adjusters, a stretching adjusting seat and a stretching adjuster, the unfolding and folding synchronous driver is fixedly connected to the fixed base, the two unfolding and folding distance adjusters are fixedly connected into the fixed base, the stretching adjusting base is connected to the fixed base in a sliding mode, and the two ends of the stretching adjuster are connected to the stretching adjusting base in a sliding mode. The garment processing equipment has the beneficial effects that the distance between the two adjusting rollers can be adjusted in the discharging and collecting process, cloth is stretched accurately and slightly, the stretching effect of the cloth is ensured, and damage is avoided; meanwhile, the occupied space is small, the distance between the stretching roller and the unwinding and winding roller can be adjusted according to actual conditions, and the optimal stretching distance is selected according to different cloth materials; operation is convenient, and adjustment is accurate.

The invention relates to the technical field of gear boxes, in particular to a gear box with an automatic liquid supplementing and lubricating function, which comprises two shells, speed change mechanisms are mounted in the two shells, liquid supplementing mechanisms are mounted in the shells, filtering mechanisms are mounted in the shells, and sealing mechanisms are mounted on the shells. A control mechanism is connected to the shell, and a protection mechanism is installed on the liquid supplementing mechanism. Through matched installation of the speed change mechanism and the shells, powerful torsion can be conveyed to an automobile through a motor, so that the automobile runs, follow-up disassembly and maintenance are facilitated, the sealing performance of the two shells is better through the sealing mechanism and the control mechanism, and through the liquid supplementing mechanism and the protection mechanism, the speed change mechanism is lubricated in real time and fully in place; and the filtering mechanism is used for filtering when the liquid supplementing mechanism works, so that impurities in the lubricating oil are effectively and repeatedly filtered, and subsequent cleaning is facilitated.

The invention relates to the technical field of logistics storage, and discloses an anti-explosion stacking type AGV for an anti-explosion vertical warehouse, the anti-explosion stacking type AGV comprises a cargo carrying table, the lower end of the cargo carrying table is movably connected with a winding drum, and the lower end of the winding drum is movably connected with machine wheels. According to the invention, through the arrangement of the stretching fork cargo lifting mechanism, when the stacking machine takes cargoes on a goods shelf, under the action that hydraulic oil is guided into a hydraulic cavity by a liquid passing groove, a driving block moves towards the other side under the action that hydraulic pressure on one side is increased, so that a pallet fork is controlled to stretch out, and after the pallet fork completely stretches out, the driving block moves to the other side; under the action that diaphragms on the two sides of a driving block are extruded inwards, control liquid on the inner sides of the diaphragms flows into an opening and closing cavity through opening and closing holes, so that a movable block moves downwards under the action of liquid pressure, a liquid through hole communicates with a communicating groove and a liquid conveying hole, hydraulic oil in a hydraulic cavity can flow into a lifting cavity, and therefore cargoes are directly lifted; and the situation that when a traditional stacking machine lifts goods, the goods carrying table needs to move up and down multiple times is avoided.

The invention belongs to the technical field of nuclear power plant mechanical fabrication, and particularly relates to a test bed detecting reliability of a stud tensioner and a detection method thereof. The test bed includes a plurality of loop I top cap stud assemblies, a plurality of loop II top cap stud assemblies, a bed plate, a plurality of support rods, a plurality of lifting lugs, and a plurality of roller assemblies and support foot assemblies. The support rods are fixedly connected the lower surface of the bed plate, a plurality of threaded through holes are evenly formed in the upper surface of the bed plate, each support rod is provided with a roller assembly and a support foot assembly, the roller assemblies are fixedly connected with the support foot assemblies, the loop I top cap stud assemblies and the loop II top cap stud assemblies are fixed to the bed plate in a large and small ring-shaped arrangement mode with the center of the circle of the bed plate acting as anaxis.