28 results about "Mechanical strength" patented technology

A roll typed impact extrusion processing method and a device of automobile drive axle housing adopts roll typed impact extrusion technique to manufacture a lute-shaped housing expanded from the middle of the driving axle housing, namely, axial compressive force is loaded to the both ends of the axle housing roughcast or the semi-finished product; in the forming die, dedicated roll pressured rolling of the driving gear is adopted to implement repeated rolling and progressive roll typed impact extrusion operation to the inner wall of the workpiece, and processes the workpiece into the needed axle housing shape. As a lute-shaped hole of the middle of the axle housing is molded by reaming and roll typed impact extrusion technology, the volume of the metal material is progressively transferred a plurality of times, and the thickness of the deformation part of the material basically remains the same, so that the metallurgical structure of the steels of the area is compact, furthermore, surface hardening greatly strengthens all the mechanical performance of the corresponding parts of the axle housing body, and improves the integral mechanical strength and rigidity of the axle housing. The method has the advantages of simple technique, convenient operation, little investment of the dedicated device and die, reliable work, and simple and easy product model conversion, which is suitable for batch produce with a plurality of varieties.

The invention relates to a high-temperature iron-based zeolite molecular sieve honeycomb type denitration catalyst and a preparation method thereof, and belongs to the technical field of atmospheric pollution treatment technologies and environmentally friendly catalyzing materials. The preparation method comprises the following steps: mixing ferrous salts with ferrite; synthesizing a zeolite molecular sieve, natural zeolite molecular sieve powder, attapulgite clay or kaolin, glass fibers, an organic binding agent, wood pulp or sesbania cannabina powder, stearic acid and glycerinum; and carrying out mixing, ageing, extrusion forming, drying and roasting to obtain the iron-based zeolite molecular sieve honeycomb type denitration catalyst. According to the catalyst, the zeolite molecular sieve and natural raw mineral materials which have excellent thermal stability are used as carriers, and the running stability, the sintering resistance and the mechanical strength of the catalyst in a high-temperature environment are improved. The obtained honeycomb type denitration catalyst has good water resistance and sulfur poisoning resistance, and the conversion ratio of oxynitride is greater than 90% under the conditions that the temperature is in the high-temperature range of 400-600 DEG C and the air speed is 10,000 h<-1>.

The invention discloses a high-impact flame-retardant reinforced PC/ABS alloy material and a preparation method thereof. The PC/ABS alloy material comprises the following components in parts by mass:42.8-68.9 parts of polycarbonate, 20 to 30 parts of ABS, 10 to 20 parts of a glass fiber filler, 0.3 to 0.8 part of a coupling agent, 3.0 to 7.0 parts of a toughening agent, 0.2 to 1.0 part of a flameretardant, 0.1 to 0.5 part of an anti-dripping agent, 0.4 to 1.0 part of an antioxidant, and 0.2-1.0 part of a lubricant. The glass fiber reinforced PC/ABS alloy material has the advantages that theprepared glass fiber reinforced PC/ABS alloy material has the characteristics of high impact resistance and high flame retardancy, meets the requirements of materials in the electronic and electric appliance industry, can improve the mechanical strength of parts, and also can achieve the effects of high impact resistance and high flame retardancy; compared with traditional glass fiber reinforced polycarbonate, the high-impact flame-retardant reinforced PC/ABS alloy material can achieve more ideal rigidity and toughness balance, and has the advantages of simple preparation process, lower cost and easiness in large-scale industrial production.

The invention discloses a high-strength composite acrylic material. A method for preparing the high-strength composite acrylic material comprises the steps of preparing long fibers with the length of about 5cm from glass fibers, preparing unordered glass fiber cloth from the glass fibers, melting an acrylic material, then, pouring the melted acrylic material into a mold by 1/3 thickness, putting the glass fiber cloth into the mold, pouring the rest acrylic material into the mold, meanwhile, discharging air from the mold through vacuumizing, and opening the mold after the acrylic material is cured, thereby preparing the composite material. Through the manner, the high-strength composite acrylic material disclosed by the invention has the advantages that the reliability is high, the transparency is high, the mechanical strength is good, the weight is light, the preparation is simple and convenient, a finished product is free of bubbles, the breakage is difficult, the cost is low, the materials are easily obtained, and the like.

The invention relates to phosphorus-containing vegetable oil based flame-retardant polyol and a preparation method and application thereof. The preparation method of the phosphorus-containing vegetable oil based flame-retardant polyol comprises the following steps: carrying out epoxide reaction on tung oil methyl ester with hydrogen peroxide and methanoic acid under the catalyzing effect of a home-made phase transfer catalyst at first to prepare multi-functionality-degree epoxidized tung oil methyl ester; reacting the obtained epoxidized tung oil methyl ester with reactive-hydrogen-containing DOPO (DOPO belongs to phosphorus-containing phenanthrene ring and heterogeneous ring compound, and the full name of DOPO is 9,10-diamine-9-oxygen heterocyclic-10- phosphaphenanthrene-10-oxide) to obtain the phosphorus-containing vegetable oil based flame-retardant polyol. The obtained polyol is a flame retardant, the synthesized structural flame-retardant vegetable oil based polyol is used in hard polyurethane flame-retardant foam, mechanical strength and flame retardance of the foam are improved, and a preparation process is simple, convenient to operate and easy to obtain. The phosphorus-containing vegetable oil based flame-retardant polyol is compounded with tris( 2-chloropropyl) phosphate, phosphorus-nitrogen synergistic flame retardant effect is good, the use amount of a flame retardant can be reduced, the flame retardant effect is much better than the flame retardant effect of the tris( 2-chloropropyl) phosphate which is used independent, and the oxygen index (LOI) can reach 29%.

The invention discloses a wave-absorbing breathable environment-friendly molding. The wave-absorbing breathable environment-friendly molding is prepared from the following raw materials in parts by weight: 5 to 9 parts of calcium borate, 55 to 65 parts of high-strength gypsum, 14 to 18 parts of fibrilia, 6 to 8 parts of polyester fiber, 10 to 16 parts of adsorbed filled earth, 1 to 2 parts of terbium oxide, 1 to 2 parts of iron oxide, 8 to 12 parts of inorganic filler, 10 to 14 parts of flame retardant additives and 12 to 18 parts of an adhesive. The wave-absorbing breathable environment-friendly molding disclosed by the invention has the excellent characteristics of good wave-absorbing effect, light quality, high mechanical strength, breathability and no cracking; in addition, the molding has the advantages of smooth surface, good toughness and impact resistance, the function of adsorbing harmful substances in the air, and relatively-excellent flame retardancy and dimensional stability; meanwhile, the preparation method disclosed by the invention has the advantages that the low cost of materials is relatively low raw materials are easy to obtain, and the process is simple; the molding for decoration has a relatively-high practical value and a good application prospect.

The invention relates to a food packaging bag and a preparation method thereof and belongs to the field of plastic product processing. The food packaging bag is prepared from, by weight, 60-90 parts of polypropylene, 0.5-4 parts of coupling agent, 1-5 parts of filler, 3-12 parts of starch, 5-15 parts of cellulose, 4-7 parts of vermiculite power, 2-8 parts of insect repellant, 1-7 parts of preservative and 1-3 parts of flexibilizer. The food packaging bag is high in mechanical strength, resistant to stretching, low in mass and good in anti-tear performance, and meanwhile has good low-temperature impact resistance; by adding the insect repellant, the food bag has the effects of resisting mildew and repelling insects, and the raw materials are easy to obtain, purely naturally, safe and environmentally friendly; the preparation method is simple, the cost of the raw materials is low, the requirement on mechanical equipment is not high, large-scale application and popularization are easy, and good economic benefits are achieved.

The invention discloses an injection mold capable of discharging air after mold assembly. The injection mold structurally comprises a top seat, an upper mold, an exhausting mechanism, a lower mold, aconnecting block and a base; the top seat is connected to the top of the upper mold, and the upper mold is connected to the lower mold through the exhausting mechanism. Compared with the prior art, the injection mold has the beneficial effects that based on the Lenz law, rigid collision during mold assembly can be prevented, and most air in a mold cavity can be discharged in time through slow dropping; after mold assembly is carried out, based on the magnetic attraction principle, magnetic attraction force is used as a power source, the spring characteristics are used, multiple air exhaust groups can simultaneously conduct air exhausting, and the air exhausting efficiency is improved. The triple revolution number of a planetary gear set is used, the air exhausting amount is increased, airin the mold cavity is completely discharged, air and melt mixing is avoided, generation of bubbles is prevented, the mechanical strength, weight and appearance of plastic parts are not affected, the quality of the plastic parts can be guaranteed, the exhausted gas can cool the plastic parts after mold opening, and demolding of the plastic parts is facilitated.

The invention discloses a sleeve grouting material for steel bar connection of a prefabricated building. The sleeve grouting material is prepared from the following components in parts by weight: 700to 900 parts of cement, 80 to 150 parts of waste concrete active micro powder, 800 to 1100 parts of quartz sand, 10 to 90 parts of composite fiber and 30 to 110 parts of an additive, the waste waste concrete active micro powder is prepared through adopting a special physical-chemical combined activation technology, so that the mechanical strength of the sleeve grouting material is obviously improved, and the fluidity of the grouting material is improved.

The invention provides a monolithic porous catalytic stirring paddle and a preparation method thereof. The monolithic porous catalytic stirring paddle is formed by adopting a 3D printing technology and comprises a paddle shaft and paddle blades, wherein the surface of each paddle blade is loaded with a catalyst layer; and in a stirring paddle structure model for 3D printing, a skeleton structure of the paddle blades is formed by filling of repeated structure units. The monolithic porous catalytic stirring paddle prepared by the preparation method has the advantages of high structural precision, high mechanical strength and the like, can be used for high-temperature and high-pressure reaction under harsh reaction conditions, and is relatively wide in application field.

The invention discloses a high-heat-resisting self-lubricating PVC/NBR composite foam board and a preparation method thereof. According to the composite foam board, PVC is blended with NBR, waste rubber powder, maleic anhydride grafted polyethylene, and polytetrafluoroethylene micropowder modified by silane coupling agent to serve as a foaming base material, the compatibility of the materials is good, the foam board achieves excellent heat resistance, self-lubrication and mechanical strength, the foam board is combined with other materials to finally prepare a composite sheet, the surface of the composite sheet is smooth, an internal structure of the composite sheet is even, the surface of the composite sheet is lyophobic and antifouling, and the composite sheet is economic and environment-friendly, and has an excellent application prospect in various fields.

The invention discloses a preparation method of double-response hydrogel ink. The method specifically comprises the steps of: firstly, preparing acryloylated F127, polymerizing and crosslinking the acryloylated F127 by using free radicals, then preparing a methacryloylated quaternary ammonium salt chitosan solution, then dissolving the cross-linked acryloylated F127 in water, adding the methacryloylated quaternary ammonium salt chitosan solution, conducting uniform stirring, adding a photoinitiator, conducting heating, and finally conducting light initiating cross-linking by using 405 nm lightof 5-10 W to prepare hydrogel, so as to obtain the double-response hydrogel ink. According to the method, chemically cross-linked F127 micelles are formed by pre-cross-linking acrylated F127, and after the chemically cross-linked F127 micelles are assembled with micellizable methacrylated quaternary ammonium salt chitosan, reversible temperature-sensitive hydrogel can be obtained, and the sol-geltransformation temperature of the reversible temperature-sensitive hydrogel can be adjusted between 28 DEG C and 40 DEG C, the mechanical strength of the gel can be adjusted and controlled through photoresponse, and the microenvironment mechanical requirements for repairing skin, cartilages and other tissues are met.

An adhesive used for moisture-proof fiberboards is disclosed. The adhesive comprises following raw materials by weight: formaldehyde, urea, resorcinol, oxidized starch, flour, polyvinyl acetate, an acid solution and an alkali solution. Beneficial effects of the adhesive are that comprehensive modification is performed through adding a small amount of the oxidized starch, the polyvinyl acetate and the resorcinol, curing time of the adhesive in fiberboard hot pressing is shortened, adhesive strength is increased, obvious characteristics including enhanced waterproofness, high mechanical strength, good dimension stability, and the like of the fiberboards are achieved, and problems that fiberboards under high-moisture environments are liable to expand and deform and strength is poor, and the like are overcome.

The invention relates to alkali-free glass fiber yarn, which is prepared from the following raw materials in percentage by weight: 20 to 40 percent of pyrophyllite, 15 to 23 percent of borocalcite, 7to 13 percent of limestone, 2 to 5 percent of feldspar, 4 to 8 percent of kaolinite, 3 to 7 percent of dickite, 2 to 6 percent of fluorite, 3 to 9 percent of borax, 1 to 3 percent of fluorite, 1 to 4percent of mirabilite, 0.2 to 1.0 percent of pure alkali, 3 to 12 percent of aluminum oxide, 2 to 6 percent of waste glass fiber yarn and 0.3 to 0.7 percent of a composite clarifying agent. The alkali-free glass fiber yarn disclosed by the invention has the characteristics of high acid-alkali resistance, high mechanical strength, high rigidity, aging resistance, high electric insulation property and high stability.

The invention provides a permanent magnetic type rotational electric device capable of preventing short circuit of a magnetic field flux generated by a permanent magnetic when ensuring mechanical strength and capable of high torque and high efficiency. At a stator (2) provided with an armature winding disposed in the internal of a cylindrical iron core and a rotor (6) freely rotatably kept in the internal of the stator, the rotor is made to be in a permanent magnetic type rotational electric device of a magnetic embedding rotor in a part of a rotor iron core (5) formed by embedding of the plurality of permanent magnets (7) into laminated circular disc electromagnetic steel plates at equal intervals, the rotor iron core is formed by lamination of at least a first electromagnetic steel plate (51A) and a second electromagnetic steel plate (51B), the first electromagnetic steel plate is provided with a magnet insertion hole (11) used for insertion of a permanent magnet and a hole (12) for preventing a flux screen of the flux short circuit formed respectively at two ends of the magnet insertion hole, the second electromagnetic steel plate is provided with a q shaft hole near a q shaft except the magnet insertion hole and the holes for a flux screen.

The invention discloses a high-strength engine cover plate which comprises an upper cover plate, connection plates and a lower cover plate. The upper cover plate and the lower cover plate are fixedly arranged through a plurality of the connection plates, the connection position of two ends of the upper cover plate and the lower cover plate is fixedly provided with a steel plate, and the upper surface of the upper cover plate and the lower surface of the lower cover plate are provided with glass fibers. According to the high-strength engine cover plate, by means of the way, the connection between the upper cover plate and the lower cover plate is reliable, stable and high in quality, and mechanical strength is high so that good compression strength of the cover plate is guaranteed.

The invention discloses a heat-resistant aluminum alloy processing technology. The invention mainly uses two elements of magnesium and aluminum as the main body of the alloy, and heat-processes by adding a certain amount of Mn, Cr, Fe and Zr to prepare a heat-resistant aluminum alloy. High temperature aluminum alloy. In the present invention, two elements of magnesium and aluminum are used as the main body of the alloy, and a certain amount of Mn, Cr, Fe and Zr is added for thermal processing, and the atomic number is increased after the modification reaction of the Schiff base complex-phosphate conversion solution. The binding force between them slows down the diffusion process of atoms and the decomposition rate of solid solution, which makes the alloy have excellent mechanical strength at high temperature.

The invention discloses a beryllium silicate glass. The beryllium silicate glass comprises, by mass, 42-49% of SiO2, 15-20% of BeO, 11-14% of Na2O, 5-10% of Al2O3, 3-6.5% of oxide of at least one transition element, 3-6.5% of at least one rare earth element oxide, 3-6.5% of UO2, and 5-8% of HfO2. The glass has an extremely high stability, an extremely good mechanical strength and an extremely high chemical corrosion resistance to radiation, and can well seal, preserve and isolate a waste liquid under a reduced size condition.

The invention discloses a tear-resistant blown film and a preparation process thereof, relates to packaging bags, and aims to solve the problem that normal use of a film bag is affected due to the fact that the film bag is prone to deformation under the pulling action of a hand, severe deformation and damage are caused, and the key point of the technical scheme is that the tear-resistant blown film comprises a base body of a cylindrical structure formed through blow molding, the base body comprises an inner layer and an outer layer, frosted parts located on the outer circumferential wall of the base body are formed on the surface of the outer layer, the multiple frosted parts are arranged in the length direction of the base body, and a cloth layer bonded with the base body is arranged between every two adjacent frosted parts. Through the arrangement of the cloth layer, the tear resistance and puncture resistance of the film can be improved, the service life of the film and the service life of a film bag can be prolonged, the high-density outer layer is made of a polyvinyl chloride material, polyvinyl chloride has the advantages of flame retardance (the flame retardant value is 40 or above), high chemical resistance and good mechanical strength and electrical insulating property, the comprehensive capacity of the film can be improved, and the service life of the film bag can be prolonged. And the strength is good.