112results about How to "Improve longitudinal strength" patented technology

A thin-wall PTFE (polytetrafluoroethylene) tube in the form of a tube of porous expanded PTFE film wherein the porous PTFE film has a microstructure containing a multiplicity of fibrils. The thin-wall tube is used in a non-porous embodiment as the balloon portion of a balloon catheter. The thin-wall tube is not elastomeric; however, because of the thinness, strength and flexibility of the tube, it may be inserted into a body conduit in a collapsed state and then deployed from a catheter and inflated up to the maximum diameter of the thin-wall tube. The porous PTFE film is provided with a continuous layer of adhesive to provide the non-porous tube; the adhesive is preferably a thermoplastic and more preferably a thermoplastic fluoropolymer such as fluorinated ethylene propylene.

The invention relates to the field of the processing of lithium-ion battery diaphragms, and discloses a preparation method for a microporous diaphragm. The preparation method for the microporous diaphragm includes the following steps: 1) a principal polyolefin resin and an auxiliary additive are uniformly stirred through a stirring mixer to obtain a mixture I; 2) the obtained mixture I is added into an extruder to be uniformly melted and plasticized into a melt; 3) an intermediate diaphragm is prepared from a cast piece of the melt extruded from a die head; 4) annealing treatment is performed on the intermediate diaphragm under bi-directional micro-tension; 5) the annealed intermediate diaphragm is stretched longitudinally to prepare the diaphragm with a microporous structure. The invention further discloses the microporous diaphragm prepared through the method, which consists of the principal polyolefin resin with a weight percentage of 75 to 99.9 percent and the auxiliary additive with a weight percentage of 25 to 0.1 percent. The preparation method disclosed by the invention has the advantage that the lithium-ion battery diaphragm with a uniform structure, the specific microporous structure and high safety performance can be prepared.

A medical retrieval device and method used in endoscopic procedures to retrieve stones has a shaft comprising a sheath with a lumen and a drive wire slidably disposed within the lumen for operating a stone entrapping mechanism on the distal end of the retrieval device. The shaft has an average outside diameter of less than 1.9 Fr. The shaft, sheath and drive wire each have proximal, intermediate and distal portions, and each of the corresponding portions are in generally similar locations along the longitudinal length of the device. The proximal portions of the shaft and the drive wire are preferably stiffer than the corresponding intermediate portions of the shaft and drive wire. The proximal and intermediate portions of the sheath have generally similar stiffnesses. The shaft reduces flow resistance within the working channel of an endoscope, increasing the flow of irrigation fluid in order to improve procedural visibility. The shaft varies in flexibility to match the requirements of a flexible endoscope and facilitate deflection of the endoscope.

The invention discloses an unmanned aerial vehicle body integrated molding technology. Carbon fiber prepreg and lightweight foam are used as raw materials, are paved on the inner wall of a double-female mold combination mold by adopting a prepreg lapping joint integral layering technology, and then are integrally solidified and molded by adopting an autoclave molding technology. The unmanned aerial vehicle body integrated molding technology has the beneficial effects that the technology is simple and is easy to operate; the molding time is short; the product size is accurate and controllable;and a manufactured unmanned aerial vehicle body has high strength, good rigidity, light dead weight and a smooth and fat surface, is easy to maintain routinely and is suitable for large batch production.

A longitudinally reinforced resin impregnated cured in place liner with a reinforcing scrim to limit longitudinal stretch is provided. A continuous length of resin impregnable tube is provided in lay flat condition, impregnated with resin and a scrim having greater strength in the warp direction than in the weft direction is placed on a portion of the bottom of the tube that is then feed into a tubular former where an impermeable film is formed into a tube sealed and continuously everted about the inner tubular member and scrim traveling in an opposite direction so that the everted wrapping envelopes the tubular member. The reinforced tube may have an integral inner impermeable layer that is installed in an existing pipeline by the pull-in-and-inflate method.

The invention discloses a method in the technical field of shipping hoisting, in particular to a modification method of a large-scale crane ship based on a large-scale oil tanker with longer parallel middle body. The floating force is increased through assembling a modified ship bow and box-shaped floating bodies at the two sides of a ship body, and the modification of the large-scale crane ship is realized through replacing a main deck by a beamless flat deck, arranging a crane and reinforcing the interior of the ship body. The invention meets the requirement on controlling the floating state during the working of the large-scale crane ship, improves the total longitudinal strength of the shipping through the arrangement of a modified deck and a centerline bulkhead, and meets the requirement on local intensity through the design of a barrel-shaped honeycomb structure. Rapid dispensation of ballast water during working is realized through the optimized design of a ballast tank and the arrangement of a ballast water pump; the work performance and the control performance are improved through configuring an auxiliary machine, an anchoring machine, a winch and a bow thruster so as to realize that the large-scale oil tanker is modified into the large-scale crane ship on the basis of little modification, therefore, the time and the cost are saved; and the method has larger economic effect and finds a new way for developing old ships.

The invention discloses a thermoshrinkable polyester film and a preparation method thereof. The preparation method comprises steps as follows: various polyester raw materials subjected to dust removal respectively enter storage bins, are respectively metered by an agravic weigher according to the proportion, simultaneously enter an inlet of a double screw extruder, are subjected to melt extrusion by a sandwich layer double screw extruder and two surface layer double screw extruders, and form a casting piece through a three-layer co-extrusion die head; the casting piece is respectively subjected to longitudinal stretching and lateral stretching, wherein the longitudinal stretching comprises a preheating zone, a stretching zone, a thermal setting zone and a cooling zone, and the thermal setting zone of the lateral stretching is more than 15m long; and the casting piece is subjected to traction rolling to obtain the thermoshrinkable polyester film. By adopting the proportioning mode of directly feeding after accurate metering by people, the instantaneous addition error range of various materials is at most 1%; and the material is biaxially stretched, so that the produced film has the advantages of greatly higher density, strength and uniformity, lower longitudinal shrinkage and lateral low-temperature shrinkage, and especially higher ductility and thermoshrinkable uniformity.

The invention belongs to the technical field of rubber tire manufacturing and particularly relates to a special patterned tire for a high-speed car. A tire ground connection surface comprises a central rib, two main drainage channels, two side drainage channels, connecting block type bionic pattern blocks and closed type outer tire shoulders. The design of the central rib guarantees the optimum longitudinal rigidity of the tire and enables control force of the tire to be directly transferred onto the road surface from the tire. 3D grooves in the positions of curve grooves break airflow, generating noise, in longitudinal grooves and reduce tire noise. Transverse grooves and single guide patterns keep the same direction, and thus the traction property and drainage property of the tire are improved. The fluency design of the patterns improves the contact between the patterns and the ground and greatly increases ground holding force. Due to the design of the connecting block type bionic pattern blocks, the strength and appearance individuality of the pattern blocks are improved. Due to the design of the closed type outer tire shoulders, abrasion and noise of the tire are reduced, and meanwhile high traction force, a shorter braking distance and accurate turning performance of the tire are guaranteed.

An improved seal-insert and seal for a toner hopper as used in toner cartridge assemblies for printers, copiers and facsimile machines. In one embodiment, the seal has two slotted, rectangular outer pieces joined together with slot alignment and joined by an inner layer of two-sided tape. The two-sided tape is made with a long u-shape which does not interfere with the slots in the outer pieces. The open end of the u-shaped tape configuration allows a seal to be inserted or removed from between the outer pieces to close or open the slots. The seal-insert is applied over the passage from the toner hopper. The outer pieces are made from an antistatic and/or a conductive material, such as an aluminum laminate or plastic imprefnated with conductive particles. Alternately, the outer pieces may be made from plastic covered with an antistatic and/or conductive spray or coating. In another embodiment, a tear-seal is made from antistatic and/or conductive material, and is provided with a tear-guide secured to and under the tear-sheet. The tear-guide has a width smaller than the tear-sheet and slightly smaller than the slot of the seal-insert. When the tear-guide is pulled by the enduser, the tear-guide will rip the tear-sheet in a straight line, providing an opening with an even width that will not block toner flow.

A three-floating body type semi-submersible platform comprises an upper portion platform and lower floating bodies which extend along the upper portion platform longitudinally; vertical columns are connected between the upper portion platform and the lower floating bodies; the lower floating bodies are floating cylinders which are in slender shapes; three floating cylinders are horizontally arranged along the upper portion platform; the central line of the middle floating cylinder and the longitudinal section of the upper portion platform are in the same plane; the two outside floating cylinders are symmetrically arranged on bilateral sides of the middle floating cylinder; at least two vertical columns are connected between the upper portion platform and every floating cylinder; the vertical columns are arranged along the longitudinal direction of the floating cylinders in an interval mode; the middle floating cylinder and the two outside floating cylinder or the vertical columns on the middle floating cylinder and the vertical columns on the two outside floating cylinders are respectively connected through at least two horizontal supports. The three-floating body type semi-submersible platform has the advantages of being high in integral strength and rigidity, stable in stormy weaves and suitable for shallow water environment, enabling the integral strength and rigidity of the platform to be guaranteed and enabling platform stability in the stormy weaves when being a large sized platform with the size of several hundred meters to be guaranteed due to the fact of a three-floating-body type arrangement structure.

A reinforced longitudinal beam for railway vehicles includes a first partial beam and a second partial beam. The first partial beam is connected to a second assembly of the railway vehicle and the second partial beam is connected to a first assembly of the railway vehicle. Particular surfaces are provided on the first partial beam for forming a welded connection to the second partial beam, and particular surfaces are provided on the second partial beam for forming a welded connection to the first partial beam, wherein one of the partial beams comprises an end facing.

A motor-vehicle seat longitudinal adjuster (10) includes a seat part seat rail (14) and a vehicle structure seat rail (16). The seat rails (14, 16) are slidable relative to each other in a longitudinal direction (x) and engage each other forming an inner channel (18). An anchor (20), fastened to the second seat rail (16), is arranged in the inner channel (18). A reinforcing profiled element (22), fastened to the first seat rail (14), is arranged in the inner channel (18). The reinforcing profiled element (22) and the anchor (20) are spaced apart from each other and engage with each other in response to a defined application of force (a crash). The reinforcing profiled element (22) has a connecting section (24) extending out of the inner channel (18) toward a rear for connection to a rear end surface (8) of a seat frame side part (6).

The invention discloses a production technology of a plastic film. The technology comprises the steps of (1) selecting raw materials; (2) feeding; (3) carrying out plasticizing extrusion on the materials; (4) blowing up and pulling; (5) carrying out wind ring cooling; and (6) reeling the film, and the like. The main process factors such as temperature, blowup ratio and traction ratio which have influence to the production of the film in the production process are selected. The technology is simple and reasonable, is capable of realizing an automatic production line, and is high in efficiency; the plastic film produced by the technology has the advantages of being good in appearance, free from fold, high in transparency, uniform in thickness, high in longitudinal and transverse tensile strength, etc.

The invention discloses a triangular loop chain type bus body structure of a full-bearing pure-electric double-layer tourist bus, which is composed of six sub-assemblies, comprising a front wall, a rear wall, a left side wall, a right side wall, a first-layer underframe and a second-layer underframe, wherein each sub-assembly is of a space truss structure composed of small-section rod pieces; thefirst-layer bottom frame is composed of a first upper-layer framework, a first lower-layer framework and a first supporting piece. The first upper-layer framework is composed of a first upper rectangular supporting main frame, a triangular link chain A and a first upper auxiliary frame; a plurality of small upright posts are arranged at the crossed position of the triangular loop chain A and the first inclined strut group; the second-layer bottom frame is composed of a second upper-layer framework, a second lower-layer framework and a second supporting piece; the second upper-layer framework is composed of a second upper rectangular supporting main frame, a triangular link chain B and a second upper auxiliary frame. Through the design of the triangular loop chain type supporting frame, a force transmission chain in the driving direction is formed, the impact resistance is improved, and meanwhile the longitudinal bearing capacity is improved.

The invention provides a locking structure of an automobile seat sliding rail. The locking structure of the automobile seat sliding rail solves the problems that an existing locking structure is large in occupied space and high in cost, and improves utilization rate of a vertical space of a sliding rail. The locking structure of the automobile seat sliding rail comprises an upper sliding rail, a lower sliding rail, locking pins, a shaft pin and an unlocking driving plate, wherein the upper sliding rail is installed in the lower sliding rail and can move horizontally and frontward and backward in the lower sliding rail under unlocking condition, locking holes are formed in the lower sliding rail, a pin installing support is installed in the upper sliding rail, the locking pins penetrate through the upper sliding rail and the pin installing support from top to bottom, pin return springs are connected and installed on the periphery of the locking pins, the unlocking driving plate is installed on the shaft pin through an unlocking driving return spring, the shaft pin is installed on the upper sliding rail through a supporting plate, and a front end bayonet of the unlocking driving plate is connected with the locking pins in a clamped mode. The locking structure of the automobile seat sliding rail is characterized in that the supporting plate is fixedly installed on one side face of the upper sliding rail through a bolt.

The invention relates to a hot winding solid corrugated pipe, and a sectional material and manufacturing method thereof. The sectional material of the hot winding solid corrugated pipe comprises a first sectional material and a second sectional material; the first sectional material comprises a supporting rib and a first hot coating layer; the first sectional material comprises a connecting strip,a first half wave crest strip and a second half wave crest strip; the second sectional material comprises a buckle plate and a second hot coating layer; a buckling groove is formed in the middle partof the second sectional material; and the shape and size of the buckling groove are matched with the shape and size of the outer wall of a small wave crest structure formed by splicing the first halfwave crest strip and the second half wave crest strip. The sectional material adopts the first sectional material and the second sectional material which are solid wall structures, and the sectionalmaterial can facilitate the cooling forming of a pipe, the production speed of the pipe is increased and the welding quality of the pipe can be improved. The solid corrugated pipe is of a solid wall structure, and is high in ring stiffness, good in impact resistance and destruction resistance, and excellent in ring flexibility. The manufacturing method of the corrugated pipe adopts hot winding tocompound all units together, the welding strength is high and the residual stress problem basically does not exist.

The invention relates to a tension device for weaving carbon fibers. A pair of rear yarn guide rollers is vertically arranged at one end of one wallboard and one end of the other wallboard, and an included angle is formed between the centers of the two yarn guide rollers; four middle yarn guide rollers are divided into two groups and respectively arranged on the wallboards and a support; a pair of swing arms is hinged to the wallboards; a tension roller is arranged at the tension roller mounting end of each swing arm through a bearing; when the mounting end of each swing arm moves to the upper surface of a support frame consisting of a pair of wallboards, the tension roller is positioned between a group of middle yarn guide rollers, and the lower circumferential surface of the tension roller and the upper circumferential surfaces of the group of middle yarn guide rollers are positioned on the same horizontal plane; and a pair of front support plates is fixed on the upper surface of one end of the support. The warp tension of the woven carbon fiber bidirectional cloth is uniform, platy macroscopic tension is 20 percent of breaking strength of a carbon fiber strand, an error is +/-2 percent, the warp texture fiber strength of the carbon fiber cloth is effectively improved, fatigue and damage tolerance is enhanced, cost is reduced, and the aim of reducing the whole weight is fulfilled.

The invention provides a super-large-span all-glass-fiber-reinforced-plastic deodorization cover plate. The cover plate is made of high-strength glass fiber reinforced plastic which is not supported by a metal framework, and is characterized in that the cross section of the cover plate is in a large-span arch shape, the longitudinal section of the cover plate is in a continuous small-span arch shape, the cover plate is formed by connecting a plurality of cover plate units, each cover plate unit comprises two semi-arch side wings positioned on the two sides, a pedestrian path is formed a sunkenpart between the two semi-arch side wings of each cover plate unit, the outer side ends of the two semi-arch side wings of each cover plate unit are provided with connecting flanges correspondingly,the connecting flanges are located at the tops of the semi-arch side wings, the two adjacent cover plate units are connected through the connecting flanges, and the connected flanges form a longitudinal reinforcing rib positioned outside the cover plate. A connecting position of the cover plate units of the cover plate is located at the top of each small-span arch shape, after the cover plate units are connected through the flanges, the flange edges form one longitudinal reinforcing rib located outside the cover plate, sealing is achieved, meanwhile, the longitudinal strength of the cover plate is further enhanced, and the span of the cover plate can be improved.

The high density wooden floor board is produced through the following steps: rotary cutting veneer, vertically cutting the facing board, defatting and drying, combining veneers in the same fiber direction to form base board blank, pressurizing to reach high density, and combining the facing board and the base board through adhesion in the same fiber direction. The high density wooden floor board includes one high density base board and one facing board combined integrally through adhering and pressing.

The invention discloses a reliably adhered three-layer combined external wall insulation decorative board which comprises a decorative board, a thermal insulation layer, a bottom plate and a mounting connecting piece, wherein the mounting connecting piece comprises rivets and a connecting plate; a V-shaped groove I is formed in the decorative board; a pit I and a pit II are formed in the thermal insulation layer; and a V-shaped groove II is formed in the bottom plate. The rivets are arranged on the bottom plate, the connecting plate is inserted into a through hole and is connected with the rivets during installation, the connecting plate is connected with a keel mounted on the external wall in advance, namely the reliably adhered three-layer combined external wall insulation decorative board disclosed by the invention can be anchored on the external wall, the installation is convenient and rapid, and the appearance of the decorative board is not damaged during installation. Moreover, the V-shaped grooves and pits are respectively formed in the decorative board, the thermal insulation layer and the bottom plate, so that the contact area among the adhesion layer, the thermal insulation layer and the bottom plate is large; and therefore, the decorative board, the thermal insulation layer and the bottom plate can be reliably adhered by glue, and the bonding strength is high.

The present invention relates to a floor slab for wood structure building and its making method. Said method includes the following steps: cutting the wood raw material into wood lath or batten with defined size, applying glue to two sides of large wood lath or batten, splicing them into slab, cold pressing and forming so as to obtain wide slab, using said wide slab as upper and lower layers of said floor slab structure; applying flue to two sides of small wood lath or batten and splicing them to obtain narrow slab, using said narrow slab as intermediate layer of said floor slab structure, cold-pressing the above-mentioned upper, intermediate and lower three layers and making them be combined together so as to obtain the invented floor slab for wood structure building.