300results about How to "Improve feeding capacity" patented technology

The invention discloses pressurizing casting device and method for an automobile hub. The device comprises a device body, a casting die, a movable sliding table, a die closing oil cylinder, a pressurizing mechanism, a side die closing mechanism, a quenching device and a control cabinet. The device has the advantages that 1, the pressurizing mechanism is additionally arranged on the basis of the existing gravity device and process; the pressurizing mechanism drives a pressurizing ring above the die to pressurize molten aluminum alloy in a die cavity; 2, a center riser is removed, and an exhaust plug is provided for exhausting; 3, a cooling system is improved, the multi-point multi-form cooling manner is carried out, and therefore, the cooling effect is improved, and the sequential solidifying process of a product can be effectively controlled; 4, a feeding opening forced cooling system is additionally arranged, so that the molten aluminum at a feeding opening can be solidified firstly, and as a result, the molten aluminum in the die cavity can be avoided reflowing. The invention also discloses a casting method of the gravity pressurizing casting device for the automobile hub. With the adoption of the device and method, the yield of castings is more than 99%; the percentage of pass of air tightness of finished product is up to 99.3%, and the elongation is up to 9.5%.

A technology for casting the steel-based cooling wall features that the cooling medium which is the mixture of corundum powder, iron powder and electrode powder is filled in its cooling pipeline. Said cooling medium features strong cooling action, low thermal expansibility, not adhering to pipe wall, and easy removing it.

The process of making cast steel supported roller is suitable for integral casting of cast steel supported roller of 5-100 ton weight. The present invention has adopts computer simulation, coating iron mold with sand, rotary cavity filling, heat insulating casting head technology, electrically casting head heating technology and sliding roller neck technology; and designs pouring system and casting mold design by means of new design principle and successive solidification principle. Adopting sliding roller neck technology and electrically casting head heating technology can avoid cracking in the cast steel supported roller.

The invention belongs to metal casting device. The magnesium alloy cast is complex, and the performance is bad. The invention is a magnesium alloy casting device which fills shape in vacuum state and solidifies them in various pressure state. It can realize the optimized casting process condition, it can be applied to produce each kind of large, complex, thin magnesium alloy casting piece with precise size and high thickness.

A length of a melamine foamed block to be accommodated in an ink tank housing as measured in the longitudinal direction is dimensioned to be larger than a length of the ink tank housing as measured in the longitudinal direction. Thus, while the foamed block is accommodated in the ink tank housing, it is compressed in the direction orienting toward an ink feeding port from which ink is fed to a printing head, i.e., in the ink feeding direction. Consequently, the ink retaining force induced by the capillary force is not intensified in the compressing direction of the melamine foamed block, resulting in an ink feeding capability of the printing head being improved. On the contrary, the ink retaining force effective at a right angle relative to the compressing direction of the melamine foamed block is intensified.

The invention discloses a garrupa extruded feed and a processing method thereof. The garrupa extruded feed comprises the following raw materials in percent by mass: 41-48% of steam fish meal, 10-14% of bean pulp, 5-10% of extruded bean powder, 5-8% of corn protein, 1-2.8% of beer yeast, 1-2% of squid liver paste, 1-2% of fish oil, 1-2% of grain raw powder, 11-15% of high protein flour, 1-2% of calcium dihydrogenphosphate, 3-4% of lecithin, 0.4-0.6% of compound vitamin, 0.5-1% of compound mineral substance, 0.6-1% of choline chloride and 0.5-0.8% of seaweed meal. In the invention, according to the digestion physiological characteristics of garrupa, feed raw materials with high bioavailability are selected, thus garrupa can be promoted to grow quickly, and ingestion effect of the garrupa is improved; and curing degree of feed granules is 85%, thus digestibility of the garrupa is improved.

The invention discloses a casting forming process of a complex high temperature alloy multi-union guide vane casting, and belongs to the technical field of precision casting. The process is characterized in that a casting body wax mold is prepared, and the casting body wax mold and a rigging system are assembled into a module; the module is coated with refractory coating layer by layer, is sent into a dewaxing kettle for dewaxing, and is sent into a baking furnace for high temperature pre-baking; the exterior of a shell is wrapped in a step type and is tied with refractory insulation cotton; ahigh temperature alloy rod is remelted and smelted to obtain high temperature alloy metal liquid; before pouring, the shell is sent into the baking furnace again, and then is sent into a vacuum induction casting furnace, and the high temperature alloy metal liquid is poured into the shell; and after pouring is completed, heat preservation is carried out, and shell removal, cutting, sand blastingand polishing are carried out after furnace exiting. The casting forming process effectively reduces or eliminates casting defects such as looseness and cracking easily generated at the connecting positions of hot joint vanes and small edge plates, the yield is improved to 75% to 80%, and the process is suitable for complex high temperature alloy multi-union guide vane casting.

The invention relates to the technical field of casting, in particular to a casting technique of a supporting frame for building. The casting technique comprises the following processes that an outer cavity real sample model is adopted to be combined with an inner cavity sand core to form a cavity of a casting; the outer cavity real sample comprises a casting model sample and a supporting bed mould wholly covering the upper side of the supporting end of the casting model sample, and the top plane of the supporting bed mould serves as a model parting surface; the inner cavity sand core comprises a first sand core body for forming an inner cavity and a second sand core body for forming a small top hole, the second sand core body is inserted into the first sand core in a matched manner, and the bottom of the first sand core extends to the lower side of a flange hole and is fixed to a lower sand mould through an arbor; an open riser is arranged at the supporting end of the casting, a riser neck is arranged between the open riser and the end face of the supporting end, and a blind riser is arranged in the flange hole of the casting; the inner cavity of the casting, the normal direction of the end face of the flange end and the periphery of the flange end are each provided with a direct cooling chiller; and an open type gating system is adopted, a flow gate of an ingate is located below the blind riser of the inner cavity and is directly communicated with the blind riser, and a filter is arranged at the tail end of the flow gate.

The invention relates to the technical field of investment pattern precision casting, in particular to a loose control method for a fine and long thin-wall crowned isometric crystal cast turbine blade. According to the provided loose control method for the fine and long thin-wall crowned isometric crystal cast turbine blade, a blade body inner pouring gate does not need to be additionally arrangedduring wax pattern combination, the opening design is made on a prepared shell when the 1/3 section of the middle portion of a blade body is wrapped by heat preservation cotton, the temperature at the blade body cotton wrapping opening position of the shell is low, solidification is fast, and the 1/3 section of the middle portion of the blade body can be promoted to be preferably solidified; goodfeeding can be provided for the preferably-solidified 1/3 section of the middle portion of the blade body through the non-solidified or slowly-solidified tenon end blade body 1/3 section and the blade crown end blade body 1/3 section, good feeding can be provided for the tenon end blade body 1/3 section and the blade crown end blade body 1/3 section through a blade crown inner pouring gate, a tenon inner pouring gate and a transverse sprue, accordingly, the sequential solidification mode that the 1/3 section of the middle portion of the blade body is preferably solidified can be achieved, andthe loose degree of the fine and long thin-wall crowned isometric crystal cast turbine blade can be effectively reduced.

The invention discloses mixed aeration type organic fertilizer fermenting equipment, which comprises a fermenting tank. A sun shed is fixedly installed at the top of the fermenting tank. The upper part of the sidewall of the fermenting tank is provided with multiple water supplement pipes. Water spray heads are arranged at the ends of the water supplement pipes at the inner side of the fermenting tank. A mixer shaft is arranged in the middle of the inner side of the fermenting tank, and aerator pipes are arranged at left and right sides of the mixer shaft. Multiple stirring paddles are arranged on the mixer shaft at the inner side of the fermenting tank. Multiple jet heads are arranged on the aerator pipes at the inner side of the fermenting tank. A driving gear is arranged on the mixer shaft at the lower side of the fermenting tank. The lower end of the mixer shaft is provided with a motor. A driven gear is arranged on each aerator pipe at the lower side of the fermenting tank. The lower end of each aerator pipe is connected to an oxygen pipe through a rotating joint. By the use of the equipment, organic fertilizers can be enshrined, fermentation activity is enhanced, fermentation period is shortened, and fermentation quality is guaranteed.

The invention discloses a nodular cast iron edging roll suitable for a universal rolling mill and a manufacturing method thereof. The nodular cast iron edging roll suitable for the universal rolling mill comprises a roll body, an upper roll neck and a lower roll neck, wherein the chemical components of the roll body and the lower roll neck are consistent, and the roll body includes, by weight percentage, 2.8-3.6% of C, 0.6-2.0% of Si, 0.3-0.6% of Mn, 0.3-1.0% of Cr, 1.0-3.0% of Ni, 0.2-0.7% of Mo, 0.05-0.1% of Re, 0.04% or more of Mg, 0.04% or less of P, 0.04% or less of S and the balance Fe. The manufacturing method includes the steps of molding, smelting, casting, box opening and heat treatment. Nodular cast iron replaces traditional universal rolling mill edging roll materials, a specific manufacturing process is adopted, the problems that an existing roll is long in production period and high in production cost are solved, and the abrasion resistance of the roll is improved.

The invention discloses a die-casting forming method free from shrinkage cavity and shrinkage porosity defects for a thick wall die-casting fitting. By the adoption of the method, the problems of shrinkage cavity, shrinkage porosity and air hole defects which are likely to happen to a thick wall aluminum alloy die-casting fitting frequently can be solved effectively. The die-casting forming method includes the main contents that a specific pouring method with the low superheat degree is adopted, large fullness pouring with the pressure chamber fullness being 60%-70% is used, the high-pressure mold filling die-casting technique is utilized, and the internal compactness zero-defect performance of the die-casting fitting is achieved. The local pressurization structure is added in mold design, and pressurization feeding at the thick wall position far away from the position of an inner casting gate is realized. By the adoption of the method, the casting defects of the thick wall die-casting fitting can be reduced, the rejection rate of products is lowered, material wasting is avoided, cost is reduced and benefits are increased.

The invention relates to a method for coating an alloy metal mould casting die, wherein coatings for the die in the method disclosed by the invention are DAG395 heat-insulating coating and PRODAG release agent. A coating process for a heat-insulating layer comprises the following steps of: firstly, thoroughly eliminating foreign matters on the surface of the die; secondly, preheating the die to 150-230 DEG C, and eliminating oxides on the surface of the die by a steel wire brush; and finally, spraying the diluted DAG395 heat-insulating coating with a thickness of 0.3-0.5 mm at a die surface temperature of 150-230 DEG C, wherein the die surface temperature is greater than 95 DEG C during the coating of the release agent, and the spraying mode is a mist-spraying method, so that the thicknesses of the coated surface film are balanced and consistent. With the adoption of the method disclosed by the invention, protection for the alloy metal mould casting die and the heat-insulating effect of preventing alloy solution from being rapidly condensed are realized; the casting defects of loosening, heat-cracking, oxidization slag inclusion and the like are not easy to generate; and a compact organization and a high-quality casting are obtained.

The invention discloses an L-shaped screw ship unloader which can improve material taking capacity and efficiency, improve ship unloading capacity, increase the utilization rate, improve the material flow smoothness of a conveying system, improve the load-carrying capacity of a supporting structure, lower ship clearing quantity, lower the energy consumption of the ship unloader and lower the requirement for the manufacturing and mounting accuracy of a vertical screw shaft. The L-shaped screw ship unloader comprises a vertical milling type screw material taking device, a reverse screw spoke middle supporting device, a vertical screw conveyor, a coaxial annular material groove material transferring device, a horizontal screw conveyor, a balance beam, a Y-shaped frame and a supporting frame. The vertical screw conveyor, the horizontal screw conveyor, the balance beam and the Y-shaped frame form a parallel four-connecting-rod mechanism. By means of the scheme, the L-shaped screw ship unloader achieves the purposes of improving the material taking capacity and efficiency, improving the ship unloading capacity, increasing the utilization rate, improving the material flow smoothness of the conveying system, improving the load-carrying capacity of the supporting structure, lowering the ship clearing quantity, lowering the energy consumption of the ship unloader and lowering the requirement for the manufacturing and mounting accuracy of the vertical screw shaft.

The invention discloses a lead-free bronze alloy and an application thereof. The lead-free bronze alloy comprises the following chemical components by mass percent: 2.3-4.3 percent of stannum, 5.0-10.0 percent of zinc, 0.6-1.7 percent of bismuth, 0.002-0.02 percent of misch metal, equal to or less than 0.05 percent of lead, equal to or less than 0.25 percent of iron, equal to or less than 1.0 percent of nickel, equal to or less than 0.03 percent of phosphor, equal to or less than 0.002 percent of silicon, equal to or less than 0.002 percent of aluminum and the balance of copper, wherein the misch metal contains 80-90 percent of lanthanum, 5-8 percent of cerium, 4-10 percent of praseodymium and equal to or less than 1.0 percent of neodymium by mass percent. The alloy basically contains no lead, is harmless to human bodies and environments, is easily cut and suitable for low pressure casting and gravity casting, and has good erosion resistance; and the bronze alloy is suitable for casts of a drinking water system.

The invention relates to the technical field of special formation of non-ferrous alloy, particularly relates to a method for applying fluctuating pressure in a low-pressure casting process and aims at solving the problem that the existing large aluminum copper alloy casting forms shrinkage cavity and porosity defects in the low-pressure solidification process. The method comprises the steps of applying the fluctuating pressure to carry out a pressure maintaining stage after an alloy casting finishes a liquid lifting stage, a mold filling stage and a pressurizing stage when the alloy casting is subjected to low-pressure casting, and unloading the fluctuating pressure after the casting is completely solidified to finish low-pressure casting, wherein the time of the pressure maintaining stage is t, and the pressure maintaining time t ranges from pressure maintaining starting to complete casting solidification. The method is used for low-pressure casting.

The invention relates to a reproduction and utilization of wasted silicasol skin. It crushes and sorts out the wasted silicasol skin to get material with the size 14-18, further screening it to get those 58-62, grinding those selected from 180-270180-270, replacing those ground quartz and so on to make sodium silicate shell. It can improve the feature of the cast mold shell with reduced manufacturing cost for the benefit of the environment.

The invention relates to the technical field of feed production and processing, in particular to feed for lobsters and a preparation method of the feed. The feed for the lobsters is prepared from components in parts by weight as follows: 15-25 parts of fish meal, 10-20 parts of soybean meal, 3-6 parts of distillers' grains, 3-6 parts of fish oil, 3-6 parts of lard, 8-12 parts of locust powder, 8-12 parts of chicken intestine powder, 3-6 parts of glycine betaine, 5-10 parts of chitin, 3-6 parts of corn stigmas, 5-10 parts of rice roots, 3-6 parts of dried bean milk cream in tight rolls, 1-3 parts of garlic, 1-2 parts of vitamin C, 3-6 parts of shaddock peels, 3-5 parts of isatis roots, 1-3 parts of ginger, 1-3 parts of poria cocos, 1-3 parts of dodder seeds, 1-3 parts of kudzuvine roots and 3-5 parts of hawthorn fruits. The formula is reasonable, the feed can meet requirements of the lobsters in rapid growth and development for nutrition, the death rate of the lobsters is reduced, and the feeding ability of the lobsters is enhanced.