66results about How to "Meet rigid requirements" patented technology

The invention belongs to the technical field of high-molecular materials, and discloses a long glass fiber reinforced composite polypropylene material, and a preparation method and an application thereof The material is prepared by using the following components, by weight, 55-75 parts of polypropylene, 20-40 parts of a continuous glass fiber, 0.1-0.5 parts of a coupling agent, 0.01-0.1 parts of a primary antioxidant, 0.01-0.1 parts of an auxiliary antioxidant, 0.5-1 part of a lubricant and 3.5-4.2 parts of compatilizer. The invention also provides a preparation method of the long glass fiber reinforced composite polypropylene material, and a use of the long glass fiber reinforced composite polypropylene material in automobile components. The long glass fiber reinforced composite polypropylene material can be widely used in automobile components comprising header boards, automobile door panels, inner casings and the like, and has the characteristics of low cost, short injection molding period, low residual stress and small warpage of products, and low fraction defective of the products.

The invention relates to a composite fiber automobile interior board and a production method thereof. The automobile interior board comprises a base layer and a non-woven or woven surface layer which is laminated on the at least one surface of the base layer, wherein the base layer consists of the following composite fibers: first fibers, namely polylactic acid fibers, second fibers, namely bastose selected from at least one of jute fibers, sisal fibers, ramie fibers, linen fibers, hemp fibers and kenaf fibers, and third fibers, namely basalt fibers in a weight percentage ratio of (20-70):(10-60):(10-60); and the surface layer consists of polylactic acid fibers. The composite fiber automobile interior board can be made into a three-dimensional deep drawing high-strength automobile interior board, and is safe, firm and environment-friendly when used as the base material of an automobile door inner board and a ceiling.

An electrical device mounting structure on a motorcycle which includes a resilient support member having a spring-flexural resilience and supporting an electrical device unit. The resilient support member has a first portion secured to a vehicle body or a member connected to the vehicle body. The resilient support member also has a second portion provided separate from the first portion and closer to the electrical device. The second portion is supported on the vehicle body or the member connected to the vehicle body via an elastic member having an attenuating property.

The invention relates to a miniature microphone manufacturing method based on an Si-Si bonding process, which comprises the following steps that: a. a connecting plate and a back plate are provided; b. the back plate and the connecting plate are bonded and fixed; c. the back plate is thinned; d. an insulating bonding layer is grown on the thinned back plate; e. a substrate is provided; f. an insulating supporting layer is grown on the substrate; g. a vibrating diaphragm is precipitated on the substrate; h. the vibrating diaphragm which is arranged in a groove is obtained; i. the back plate and the substrate are bonded and fixed; j. the connecting plate and an oxidization layer above the substrate are etched; k. a lower electrode hole is obtained on the back plate; l. an electrode layer isprecipitated on the back plate; m. electrodes on the back plate and the vibrating diaphragm are obtained; n. a plurality of sound holes on the back plate are obtained; and o. the other end of the substrate which corresponds to the back plate is etched to obtain a vocal cavity below the vibrating diaphragm. The miniature microphone manufacturing method based on the Si-Si bonding process has the advantages of high sensitivity, low cost, wide frequency band, high finished product rate and simple manufacturing process.

An information processing apparatus including a display portion, and a casing including an inner circumference wall portion that faces a side wall of the display portion and an inner circumference bottom plane portion that faces a rear surface of the display portion. The display portion is secured to the inner circumference wall portion and the inner circumference bottom plane portion of the casing with an adhesive agent.

The invention provides a double-layer PVC (Poly Vinyl Chloride) composite material and a preparation method thereof. The composite material comprises an upper layer and a bottom layer which are formed by up-down co-extrusion. The upper layer comprises the following components in mass percent of 13-17% of PET (Poly Ethylene Terephthalate) resin, 2-4% of plasticizer, 4.5-5.5% of aluminum silver powder, 0.9-1.1% of stabilizing agent, 0.3-1.5% of lubricating agent and residual amount of polyvinyl chloride resin; the lower layer comprises the following components in mass percent of 2-4% of the plasticizer, 0.3-1% of the stabilizing agent, 25-35% of filling agent and residual amount of the polyvinyl chloride resin. The upper layer of the double-layer PVC composite material provided by the invention comprises the aluminum silver powder, and the aluminum silver powder is applicable to filling pits on the surface of the upper layer, so that the surface of the upper layer has high fineness and brightness to satisfy the decorating effect on the surface of the household appliances. The bottom layer is a hard PVC layer and has preferable mechanical properties and product stability, so that the rigid requirements of the entire product can be met.

The invention provides a PVC (Poly Vinyl Chloride) composite material and a preparation method thereof. The composite material comprises an upper layer and a bottom layer which are subjected to up-and-down co-extrusion forming; the upper layer comprises the following components in percentage by mass: 15 percent of PET (polyethylene glycol terephthalate) resin, 3 percent of plasticizer, 5 percent of aluminium silver powder, 1 percent of stabilizer, 0.3 to 1.5 percent of lubricant and the balance of PVC resin; and the bottom layer comprises the following components in percentage by mass: 3 percent of plasticizer, 0.3 to 1 percent of stabilizer, 0.3 to 1 percent of lubricant, 24 to 36 percent of filler and the balance of PVC resin. The upper layer of the double-layer PVC composite material provided by the invention comprises the aluminium silver powder, and the aluminium silver powder is suitable for filling concave pits on the surface of the upper layer, so that the surface of the upper layer has high smooth finish and brightness to meet the surface decoration effect of household appliance equipment; and the bottom layer is a hard PVC layer, has good mechanical performance and product stability, and is suitable for meeting the integral rigidity requirement of the product.

An aircraft tire has an inflation pressure greater than 9 bar and a deflection greater than 30%. The tire includes a crown, two sidewalls and two beads, a carcass reinforcement anchored in the two beads and a crown reinforcement. The carcass reinforcement includes at least one circumferential alignment of reinforcement elements and the mechanism for anchoring the reinforcement elements within each bead includes circumferentially oriented reinforcement elements axially bordering the circumferential alignments of said reinforcement elements of the carcass reinforcement. The reinforcement elements of the carcass reinforcement and the circumferentially oriented reinforcement elements are separated from each other by a bonding rubber mix of very high elasticity modulus. The circumferentially oriented reinforcement elements are in the form of cables having a penetrability of between 80 and 100%, the breaking load of the cables being greater than 150 daN, and the cables having an elongation at break greater than 4%.

The invention discloses a jam-releasing method and device using spring periodic stretching and continuous vibration. The invention is to set a valve in the pipe string. When the circulating fluid pressure entering the pipe string is greater than the reaction force of the spring inside the pipe string, the valve hole When it is closed, the circulating hydraulic pressure compresses the spring and converts it into the compressed elastic potential energy of the spring. When the compressed potential energy of the spring gradually increases to equal the circulating hydraulic pressure, the valve hole opens, causing the pressure in the pipe string to become unbalanced instantly, and the compressed elastic potential energy of the spring is instantly released and released. Drive the shock hammer in the pipe string to suddenly impact upwards, and transmit the impact kinetic energy to the stuck point through the pipe string; after completing one shock, all parts in the pipe string will reset at the same time to prepare for the next energy storage impact, and repeat the above process , forming periodic repeated vibration until the card is released. The invention can not only be used for the salvage operation of vertical wells, but also can be used for the jamming and salvage operations of inclined wells, extended displacement wells and horizontal wells. There is no need to manually reset the operation during operation, and it can continuously vibrate until the card is released, which is more efficient and faster than conventional technology.

The invention relates to polyurethane foam for an automobile dry-method ceiling and a preparation method thereof and belongs to the technical field of production of the polyurethane foam. The polyurethane foam is prepared from polyether glycol, an isocyanate mixture, a catalyst 1, a catalyst 2, a silicone oil type surfactant, a solid additive, a polyurethane antioxidant, a pore opening agent and water through mixing and foaming. The technology provided by the invention is suitable for large-batch and multi-scale production; manpower of a foaming line can be used in other posts so that the production efficiency is effectively improved. Furthermore, when the yield is greater, the foaming rate is higher. Continuous foaming and box type foaming, which are universally accepted in an industry, have better advantages in the aspect of foam block quality; raw materials are accurately metered and foam holes are uniform; the difference of upper, middle and lower parts of the foam blocks is reduced; unavailable parts of the tops and bottoms of the foam blocks are controlled; the yield of products and the like can be improved by adopting various ceiling technologies.

The invention relates to a structure optimization design method of a machine tool component, in particular to a key host component structure optimization design method based on a machine tool workingstate. The method comprises the following steps: A, performing multi-working-condition topological optimization based on a machine tool motion state; B, parameterization reconstruction is carried outon the geometric model combined with the optimized topological structure; C, optimizing the shape and the size based on multiple working conditions of the machine tool in the motion state; D, performing production state evaluation based on machine tool machining and assembling conditions. The method is not limited to an assembly structure needing to be optimized, but comprehensively considers complete machine mounting structures such as the motion connecting piece and the supported piece, and fully considers various motion states and various working conditions of the machine tool, so that theoptimized design index is closer to the actual working state of the machine tool, and the optimized structure is higher in reliability.

The invention discloses a sound-absorbing aluminum plate comprising an upper aluminum plate layer, a lower aluminum plate layer and a middle aluminum plate layer connected between the upper aluminum plate layer and the lower aluminum plate layer. The upper aluminum plate layer comprises a basic aluminum plate and an aluminum sheet arranged on the surface of the basic aluminum plate, the middle aluminum plate layer is corrugated, bubble holes in irregular arrangement are formed in the corrugated surface of the middle aluminum plate layer, and both the basic aluminum plate and the lower aluminum plate layer are foam aluminum plates. The sound-absorbing aluminum plate is good in sound absorption function, high in appearance decorativeness, high in rigidity and large in application range, and has good application prospect.

The invention provides a PCM compound steel plate. The front face of the steel plate is coated with a primer layer, an upper roller of the primer layer is coated with a finish layer, an upper roller of the finish layer is coated with a pattern printing layer, the surface of which is embossed with a decorative pattern, and an upper roller of the pattern printing layer embossed with the decorative pattern is coated with a protective paint layer. The pattern printing layer realizes the visual effect of various colors and patterns, the surface embossing forms concavo-convex stereoscopic impression, the rigidity of the steel plate is increased, the rigidity requirement can be satisfied through selecting a thin base material so that the cost is reduced, the forming qualification rate of a finished product is enhanced, and the PCM compound steel plate is extensively used for the industries of home appliances, decoration and the like.

The present invention relates to a surgical thread comprising at least a first portion extending longitudinally and comprising a central thread covered with a sheath, said sheath comprising fastening means each comprising at least one conical barb. The present invention also relates to a medical device comprising such a surgical thread and a surgical needle.

The invention discloses a low-heat-storage-degree polypropylene composite material for automotive upholstery and a preparation method thereof. The material comprises the following raw materials: 55-75parts of polypropylene, 5-15 parts of polyolefin elastomer, 10-20 parts of talcum powder, 3-10 parts of infrared reflection filler A, 3-10 parts of infrared reflection filler B, 0.6-1.0 part of antioxidant, 0.3-0.5 part of dispersing agent, 0.5-3 parts of deodorant, 0.3-3 parts of scratch-resistant agent, 0.5-2 parts of stabilizer and 1-3 parts of infrared reflection pigment. The invention also provides the preparation method of the polypropylene composite material. The infrared reflection filler A, the infrared reflection filler B and the infrared reflection pigment are compatible with polypropylene, the blending effect is good, reflection of the polypropylene composite material to visible light, infrared light and ultraviolet light radiation energy is improved, the capacity of absorbingillumination radiation energy is reduced, the temperature in an automobile is reduced, and the comfort of passengers is improved.

The invention discloses a tensioning flexible guide rail type domestic simple elevator comprising a lift car, a lifting traction mechanism and a power source; two sides of the lift car are connected with the lifting traction mechanism by a guide rail and a guide roller; a pulley at the top end of the lifting traction mechanism is fixedly arranged on the outer eave of a roof by a supporting beam; hoisting equipment of the lifting traction mechanism is fixedly arranged by virtue of a load bearing wall; a driving motor in the hoisting equipment is electrically connected with the power source; the lift car is internally provided with a control switch for controlling the operation of the driving motor; and the guide rail adopts a flexible guide rail. The simple elevator disclosed by the invention is mounted on a balcony or a windowsill and occupies no public spaces or an extremely small public space; due to the adoption of the flexible guide rail, not only can the rigidity requirement be met under the action of a tension, but also the elevator can be shrunk to be stored when not being used; due to the arrangement of a rope breaking protection device, a protecting effect can be achieved, so that the risk that the elevator falls down is avoided; and the simple elevator has the characteristics of space saving, convenience in mounting and operation as well as safety and reliability.

The invention discloses a horizontal milling machine spindle which comprises a bearing chamber and a spindle core arranged in the bearing chamber in a penetrating mode, the spindle core is sleeved with a front bearing assembly and an inner spacer ring, a front step part is formed at the front end of the spindle core, and the inner spacer ring is arranged between the front step part and the front bearing assembly in a clamped mode. The outer side of the inner spacer ring is sleeved with an outer spacer ring, a gap is formed between the inner spacer ring and the outer spacer ring, a front bearing gland is fixed to the front end of the bearing chamber, a gap is formed between the front bearing gland and the shaft core, and a rear resisting convex ring is formed at the rear end of the front bearing gland. The rear resisting convex ring is clamped between the inner wall of the opening in the front end of the bearing chamber and the front step part, and the rear resisting convex ring is in abutting fit with the outer spacer ring. Compared with the prior art, the front bearing gland can be pushed from the front end of the shaft core, so that the assembly difficulty is reduced, the maintenance cost is saved, and meanwhile, the rigidity requirement can be met.

The invention discloses a reticulated shell structure and a box type joint support of the reticulated shell structure. The box type joint support includes a web plate and a joint plate arranged in thesupport, the joint plate is connected with the adjacent web plate, a hollow inner box is formed, the web plate extends outward from the center of the hollow inner box, the upper end of the outer sideof the web plate and the lower end of the outer side of the web plate are provided with transverse plates, the outer sides of the transverse plates are connected with flange plates of main beam-and-rod piece, and connection parts of the joint plate, the web plate and the transverse plates are welded to one another and fixed. The reticulated shell structure can be used for jointing and splicing ofH-shaped-steel main beam-and-rod pieces different in size, angle and rotation angle, connection of the joints is simple and feasible, and stress is reasonable.

A reinforcing structure is integrally formed on a front wall of a cylinder block of shallow water jacket type. The reinforcing structure comprises mutually crossing vertical and lateral ribs. The vertical rib extends vertically between upper and lower deck portions of the cylinder block, and the lateral rib is constructed to constitute a raised ridge of a front one of jacket bottom wall. Alternatively, the reinforcing structure comprises a raised bolt boss that is integrally formed on a front one of jacket bottom walls to catch a connecting bolt used for securing a middle portion of a front cover to the front wall.

The invention provides a high-precision net-free ultrathin resin grinding wheel cutting blade which does not adopt a conventional grinding wheel blade ring glass fiber reinforced net. The grinding wheel cutting blade manufactured by the manufacturing method belongs to a high-environment-friendliness innocuous and harmless product, and can meet environment-friendly requirements such as SGS; a producing process is reasonable, rigorous and scientific; the manufactured grinding wheel cutting blade has a thickness ranging from 0.1 mm to 1.0 mm, is uniform in structural organization, is extremely low in hardness deviation, has flatness within +/-0.02mm, has lot thickness error within +/-0.03mm, is good in self-sharpening performance, is sharp in cutting, is high in cutting efficiency, is free ofburrs during workpiece cutting, is free of burns, is flat and bright in cut end opening, and even achieves the mirror effect; and cut materials can be saved to the greatest extent, and material wastecost is greatly reduced for enterprises.