90results about How to "Fully fed" patented technology

The invention discloses a cast magnesium alloy of low linear shrinkage, which belongs to the field of magnesium alloys. The magnesium alloy consists of Mg, Al, Zn, Mn, rare earth, Nb, Li and M element, wherein the materials have the following weight percentage composition: 1.5-25 percent of Al, 0.1-3.5 percent of Zn, 0.1-2.2 percent of Mn, 0.0002-16 percent of rare earth, 0.0002-4 percent of Nb, 0.0002-9 percent of Li, 0.0002-2 percent of M element and the balance Mg; and the M element is at least one of Zr, Ti, Sr, Ca, C and B. According to the heat-resistant magnesium alloy, the rare earth element and the Nb element are added into the magnesium alloy, so that the structure of beta phase is changed; the Zr element and the M element are added to refine crystal grains; due to combined action of the elements, latent heat of crystallization during alloy solidification is changed; and the magnesium alloy which has superior mold-filling capacity, low shrinkage, superior mechanical property and good machinability, fluidity and die-cast performance and is suitable for casting is obtained.

The present invention provides compound feed for the polyculture of Litopenaeus vannamei and Trachinotus ovatus and a preparation method thereof. The compound feed is characterized by comprising the following ingredients in parts by weight: 15-25 parts of fish meal, 5-10 parts of meat and bone meal, 1-5 parts of maggot powder, 15-25 parts of soybean meal, 5-10 parts of peanut bran, 1-5 parts of soybean protein concentrate, 1-5 parts of cottonseed meal, 1-5 parts of corn gluten meal, 1-3 parts of molasses yeast, 1-3 parts of corn DDGS, 1-3 parts of squid paste, 1-3 parts of shrimp shell powder, 20-25 parts of high-gluten flour, 1-2 parts of sea fish oil, 1-2 parts of soybean oil, 1-2 parts of soy lecithin, 0.5-1 parts of calcium dihydrogen phosphate, 0.1-0.3 parts of choline chloride, 0.1-0.3 parts of cholesterol, 0.05-0.1 parts of L-ascorbate-2-monophosphate, 0.1-0.3 parts of coated lysine, 0.1-0.3 parts of coated methionine, 0.1-0.3 parts of Bacillus subtilis, 0.1-0.3 parts of mannan, 0.1-0.5 parts of complex vitamins, 0.1-0.5 parts of complex mineral salts. Experiments show that the compound feed for the polyculture of Litopenaeus vannamei and Trachinotus ovatus of the present invention can effectively meet the comprehensive nutrient needs of both Litopenaeus vannamei and Trachinotus ovatus, significantly improves the effective utilization of the feed, and has a relatively low food coefficient.

The invention provides a high-grating-rate and low-odor polypropylene resin composition and a preparation method thereof. The polypropylene resin composition consists of the following components in parts by weight: 100 parts of polypropylene resin, 1-3 parts of a polar monomer, 0.01-1 part of an initiator A, 0.01-1 part of an initiator B and 0.5-2 parts of a second monomer. The preparation method comprises the steps of weighing raw materials according to the weight part, mixing the raw materials in a high-speed mixer for 2-5min and discharging materials; and implementing reactive extrusion grafting on the mixed raw materials through a dual-screw extruder. The polypropylene resin composition disclosed by the invention, through selecting initiator and comonomer, reduces pungent odor of materials and improves grafting efficiency. The prepared polypropylene disclosed by the invention has the advantages of light product odor, high grating rate and low gel rate, and is applicable to a flexibilizer and a compatilizer of polar monomer and non-polar polymer alloy; the polypropylene resin composition is used for filling or strengthening polypropylene, and is capable of improving the mechanical performance and the heat resistance of the material.

The invention discloses a dual-compound wear-resisting hammer comprising a hammer handle and a hammer body; the hammer body is formed by compound casting of two kinds of metal liquids, and the hammer body is in casting connection with the solid hammer handle to form the hammer. The manufacturing method includes the following steps: step 1, manufacturing and casting a sand mold according to a structure of the hammer; step 2, processing the hammer handle with a low-alloy steel blank material, and preburying one end of the hammer handle into the casted sand mold of the hammer; step 3, selecting high-chromium cast iron and carbon steel, and carrying out quantitative pouring in sequence; and step 4, carrying out heat treatment. The dual-compound wear-resisting hammer not only can improve wear resistance of the hammer but also allows the hammer body and the hammer handle to be combined closely and not generate cracks, casting defects are overcome, the product yield is improved, the cleaning workload is reduced, and the quality and the service life of the hammer are improved substantially.

The invention provides a 3D printing forming casting method for a large-scale complex thin-wall high-temperature metal component. The method comprises the data acquisition process, the process designand forming and simulation optimization pouring process, the SLS wax model 3D printing process, the casting system evanescent mode foam forming process, the process gating system assembling and shellmaking process, the roasting and demolding process, the vacuum casting process, the pressurization solidification process, the metal component cleaning process, and grinding and polishing process. According to the casting method, the advantages of the 3D printing process, the investment casting process, the evanescent mode casting process are combined, so that a reliable technical scheme is provided for rapid preparation of the large-scale complex thin-wall high-temperature metal component; the problems that the air permeability is poor, the feeding distance is insufficient are solved by adopting the vacuum pressurizing pouring process; and the production period of the large-scale complex thin-wall high-temperature metal component is shortened from 1-3 months to less than 10 working days,and rapid production of the large-scale complex thin-wall high-temperature metal component is realized.

The invention relates to a vacuum gravity casting method of an aircraft engine block. The method comprises the following steps: graphite paint is dipped on the surface of a mesoporous sand core of a die used for gravity casting, chilling coating is coated at the part of the die used for gravity casting close to an air passage, a sealing cabin provided with the die is vacuumized before casting through a snake-shaped casting opening, and the mesoporous sand core and the sealing cabin are filled with compressed air after casting. Due to the adoption of the closed vacuum casting, the casting is performed through the snake-shaped casting opening, and as the graphite paint and the chilling coating are adopted, the compressed air is blown in the mesopore to carry the heat away, the shrinkage cavities in the casting part are greatly reduced, the qualification rate of the finished products of the casting part is improved to about 90 percent from 20 percent and the production cost is greatly reduced.

The invention belongs to the technical field of precision casting and particularly relates to a method for reducing microporosity during casting of a high-temperature alloy test bar. According to the method, by enlarging a feeding channel of molten steel in the test bar pouring process, the pouring temperature and a mode of heat dissipation of the test bar are improved, too quick solidification on the surface of the test bar is reduced, and the feeding effect of a pouring system is improved. The smoothness of the feeding channel of a test bar detection part is achieved, the microporosity defect in the middle of the test bar is completely introduced into the pouring system, and the microporosity caused by too many impurities in alloy liquid is reduced by utilizing a filtering system.

The invention discloses a magnesium alloy with hot cracking resistance and low linear shrinkage, and belongs to the magnesium alloy field. The magnesium alloy is composed of elements of Mg, Al, Zn, Mn, rare earths, Nb and Li, and comprises, by weight, 1.5 to 25 percents of Al, 0.1 to 3.5 percents of Zn, 0.1 to 2.2 percents of Mn, 0.0002 to 16 percents of rare earths, 0.0002 to 4 percents of Nb, 0.0002 to 9 percents of Li, and the balance Mg. According to the magnesium alloy, the structure of Beta phase is changed by adding rare earth elements and the Nb element into the magnesium alloy; grains are refined by adding the Li element; and crystallization latent heat is changed when the magnesium alloy is solidified by the combined action of the elements, so that the heat resistant magnesium alloy which has good mold-filling capacities, low shrinkage rate, good mechanical properties, machinability, mobility and die-casting properties and is suitable for casting is obtained.

The invention provides a high-pressure hub casting mold. The high-pressure hub casting mold comprises an upper mold body, a side mold body, a bottom mold body and a gas pressurization system, whereinthe upper mold body, the side mold body and the bottom mold body form a casting cavity for a hub to be cast after being assembled; the center of the upper mold body is connected with a liquid storagehopper; a metal liquid storage chamber communicating with the casting cavity is formed in the liquid storage hopper; the gas pressurization system is connected with the liquid storage hopper through aventilation pipe and communicates with the metal liquid storage chamber; the side mold body is provided with a runner, and a pouring gate is arranged at the outer end of the runner; and after metal liquid is poured into the casting cavity, the gas pressurization system is used for applying high pressure to the metal liquid in the metal liquid storage chamber, and the metal liquid in the metal liquid storage chamber carries out feeding on a hub casting in the casting cavity under the high pressure applied by the gas pressurization system. The high-pressure hub casting mold further comprises aheating system, a cooling system and a demolding system used for demolding the formed hub casting. According to the high-pressure hub casting mold, a working allowance is reserved for the casting, thedeformation amount of the casting is reduced, the production efficiency is improved, and the rejection rate is low.

The invention discloses alloy constructional steel 27SiMn with 180-200mm thickness and a manufacturing technology thereof. The alloy constructional steel 27SiMn is prepared from the chemical raw materials in percentage by mass: 0.27-0.30% of C, 1.2-1.4% of Si, 1.2-1.3% of Mn, no more than 0.030% of P, no more than 0.030% of S, 0.0008-0.001% of B, 0.020-0.030% of Ti, and the balance of Fe and residual elements. The manufacturing technology comprises the following steps of converter smelting, LF refining, VD vacuum degassing, die casting, heating, rolling, stacking cooling, and heat processing.The components of the alloy constructional steel 27SiMn are rationally designed, the manufacturing technology is improved, and parameters are accurately controlled, so that the alloy constructional steel 27SiMn with 180-200mm thickness and with a good combination property is obtained, and requirements of customers are better met.

The invention provides a process method of a lost-foam casting double-liquid compound crusher hammer. The process method is characterized in that a hammer handle is arranged downwards and a hammer end is arranged upwards in a module formed by foam patterns, and the module is formed by connecting a riser, an inner gate and a pouring gate; when two metal materials are melted to respective tapping temperature in two furnaces respectively at the same time, two types of molten metal are poured into the same casting mold one after another, after a casting is solidified and cooled, a casting head is cut, and the double-liquid compound hammer is obtained. The process is simple, the cost is reduced by 20%, the production efficiency is increased by 50%, the quality is stable, and the energy-saving effect is remarkable.

The invention relates to a casting device and in particular to a large-scale casting device for an aluminum-water utensil. The large-scale casting device consists of an upper sand mould, a metal positioning cone, a fastening bolt, a straight pouring gate, inner pouring gates, a dead head, a lower part of the lower sand mould, an upper part of the lower sand mould and cold iron. The large-scale casting device is characterized in that the straight pouring gate is perpendicular to the ground, the upper and the lower inner pouring gates are in angled design; molten water forms two different pressure differences in the inner pouring gates to ensure that the molten iron can fill up a utensil mould cavity within the shortest time; the straight pouring gate and the inner pouring gates consist of ceramic tubes with inner wall diameter of 120 mm; the upper sand mould and the lower sand mould are positioned through the metal positioning cone, and are connected through the fastening bolt after being closed; the dead head is a heating thermal-insulation dead head with diameter of 180 mm; feeding for casting pieces is relatively sufficient, and a self-utilization rate of the molten iron is greatly increased. The large-scale casting device has the advantages of being simple in structure, reasonable in design, time-saving and labor-saving, high in molten iron utilization rate, high in efficiency, good in casting piece surface quality, and the like.

The invention relates to a feeding device, in particular to a feeding device for an aquaculture fertilizer. Against the technical problem to be solved, the invention provides the feeding device for the aquaculture fertilizer, which saves time and labor and can evenly feed baits. In order to solve the technical problem, the invention provides the feeding device for the aquaculture fertilizer, whichincludes a mounting frame and the like. The inner bottom of the mounting frame is connected with a feeding mechanism, the upper portion inside the mounting frame is connected with a stirring mechanism, and the inner middle of the mounting frame is connected with a feeding box. The feeding device for the aquaculture fertilizer achieves effects of being capable of saving time and labor and evenly feeding the baits. The feeding mechanism is arranged, so that the baits in the feeding box are fully stirred, and the well-stirred baits are continuously and evenly fed into a cultivation farm under the filtering action of a filter screen, so that aquatic animals and plants can be fully fed; The stirring mechanism is arranged to fully stir the baits in the feeding box, and thus the feeding device saves time and labor and is high in stirring efficiency.

The invention relates to a feeder head coating structure and treatment method of an aluminum alloy low-pressure cast. The feeder head coating structure comprises a mold and a feeder head formed by a cavity in the mold. The feeder head is communicated with a mold cavity forming a cast body, and a sintered feeder head coating is arranged between the mold and the feeder head. The thicknesses, from the bottom of the feeder head to an opening, of the feeder head coating are gradually decreased to form a gradient. The feeder head coating with the gradient is adopted for making the coating at the bottom of the feeder head be thick, the thicknesses from the bottom of the feeder head to the opening are gradually decreased, in this way, the thermal insulation effect is excellent, molten metal at the bottom of the feeder head is prevented from solidifying firstly in the process of feeding, it can be effectively guaranteed that sufficient feeding is performed on the cast through the feeder head, the feeder head coating has certain surface strength and smoothness after sintering, the adhesion property of the coating on the mold is good, the combination between coatings is good, the possibility that in the casting process, the high-temperature molten aluminum erodes the coating is lowered, and the feeder head coating is effectively prevented from falling off in the process of cast stripping.

The invention relates to a combined smelting device capable of increasing the yield of alloy castings and application of the combined smelting device, and belongs to the technical field of vacuum induction melting and investment casting. A crucible used for primary smelting and an ingot mold used for primary smelting are matched to prepare mother alloy cast ingots in a vacuum induction furnace, the outer surface of each mother alloy cast ingot is polished, and riser parts are cut off; and afterwards, a crucible used for secondary smelting and a refined casting mold shell used for secondary smelting are used for investment casting in the vacuum induction furnace, and thus, a precision casting is obtained. According to the combined smelting device capable of increasing the yield of the alloycastings and the application of the combined smelting device, a distribution disc is adopted for a sprue for primary smelting so that multiple mother alloy ingots can be cast at a time, ingot molds with different sizes can be used and the number of the ingot molds can be selected according to the quantity of molten materials, and the size of the ingot molds is matched with that of the crucible for secondary smelting and the material quantity. On the one hand, material waste is reduced, and the yield of materials is increased; and on the other hand, axial enlarged areas are designed at the twoends connected with the precision casting, so that sufficient feeding of the precision casting is achieved at the later casting solidification stage, and casting defects such as shrinkage cavities and shrinkage porosities are reduced.

The invention provides a method and a device for improving the quality of a slab tail blank. The method comprises that a actual running speed of a continuous casting machine is obtained, whether the actual running speed is larger than a reference speed is judged, if the actual running speed is larger than the reference speed, and the continuous casting machine is controlled to be decelerated to the reference speed according to a first deceleration speed; based on a preset second deceleration speed and a preset first deceleration interval, the reference speed is controlled to be gradually reduced to a first speed and stayed around the preset first time; based on the second deceleration speed and a preset deceleration interval, the reference speed is controlled to be gradually reduced to a second speed and stayed around a preset second time; wherein the first deceleration interval comprises 0.2 m/min, the reference speed is 1.2 m/min, and the first deceleration speed is 0.05 m/min2.

The invention discloses a splicing frog casting system and a casting method. The system comprises a pouring system, wherein the pouring system communicates with a frog toe end of a frog cavity formedin the casting mold, and the pouring system comprises a pouring gate component and a pouring and feeding open riser component. According to the splicing frog casting system, a toe end pouring system is provided with a pouring and feeding open riser, a casting is provided with a heating thermal insulation necking blind riser, the risers are arranged between holes, the rail top surface between the risers is matched with the strip-shaped bright iron, inclined pouring is carried out, and after pouring, a cold box opening process is adopted, and the casting is placed at the room temperature for hammering to remove the risers. Under the condition of inclined pouring, sequential solidification is achieved, the heating thermal insulation riser and a cold iron are matched, sufficient feeding is obtained on the frog rail surface, the risers are removed by using a hammering mode after opening, cracks caused by flame cutting are avoided, and casting defects such as shrinkage porosity are completely eliminated through ray inspection.

The invention discloses a paint mixing, stirring and collecting device, which comprises a device body, wherein a filtering and feeding device is arranged in the device body, a filter screen is arranged in the filtering and feeding device, and a stirring device is further arranged on the lower side of the filtering and feeding device. According to the invention, by arranging the filtering and feeding device, two paints can be sequentially filtered and mixed, so that impurities can be prevented from being mixed in the paints, the feeding amount can be controlled, and the influence of the non-uniform feeding on the stirring effect is avoided; by arranging the stirring on the lower side of the filtering and feeding device, two paints are fully stirred, so that the paints are completely mixed;and a cleaning device is arranged on the left side of the stirring device, and cleans the paint in the stirring cavity, so that the situation that use is affected due to the fact that the paint is notcleaned for a long time is avoided.