97 results about "Pressure die casting" patented technology

This invention relates to a method for thermal treatment of high-efficiency and high-performance low-pressure die casting A356 alloy wheel. The method comprises: performing solid solution treatment at 535-545 deg.C for 5-7 h, quenching, performing low-temperature pre-aging treatment, and then performing aging treatment at 175-185 deg.C for 3-5 h immediately. The method has such advantages as shortened solid solution treatment time, shortened aging treatment time, high strength of low-pressure die casting A356 alloy wheel, shortened thermal treatment period, increased production efficiency, and improved mechanical properties of low-pressure die casting A356 alloy wheel.

The invention discloses a method for producing a zinc alloy spectacles frame, zinc alloy spectacles feet or zinc alloy spectacles foot heads through pressure die casting, which comprises the following steps: (1) producing corresponding casting dies according to the spectacles frame, the spectacles feet or the spectacles foot heads, which are required to be subjected to machine shaping; (2) performing hot-melting on pressure die casting zinc alloy, and injecting the molten zinc alloy into the casting dies for primary machine shaping through a pressure die casting machine; and (3) performing demoulding after cooling the molten zinc alloy, and performing machine processing, polishing and electroplating. Compared with the prior spectacles raw material, the zinc alloy has the characteristics of good casting property, capability of performing cathode treatment of electroplating, good normal-temperature mechanical property and abrasion resistance, and low melting point, so that the method is suitable for producing various spectacles; manufactured spectacles finished products have diversified colors and are more fashionable; and the method has the advantages of simple production process of pressure die casting, low cost, small labor and high grade.

A sprue insert-set which substantially eliminates sprue castings and improves melt-flow in high-pressure hot-chamber diecasting. The insert-set consists of (i) a heated sprue body insert for mounting in the fixed dieblock of a die set and (ii) a cooled sprue tip insert for mounting in the moving dieblock of the die set. The body and tip inserts are mounted so that their inner ends mate with one another in the region of the die parting-line to conjointly form a curved transition channel that connects the sprue channel in the body insert with a runner channel formed along the parting-line of the die set. The temperatures of the body insert and the top insert can be controlled so that the freeze-point occurs in the transition channel and the melt in the sprue channel is able to run back into the machine nozzle at the end each shot, thereby eliminating sprue castings.

The invention discloses copper alloy for manufacturing a mould and a preparation method thereof. The copper alloy consists of the following components in percentage by mass: 1.10 to 1.70 percent of Ni, 0.20 to 0.40 percent of Co, 0.10 to 0.40 percent of Be, 0.08 to 0.20 percent of Zr, 0.02 to 0.10 percent of Y, 0.02 to 0.05 percent of Ce, and the balance of Cu; and the copper alloy is prepared by processing steps of melting, pouring, hot forging, solid solution, cold forging and ageing. The copper alloy for manufacturing the mould has the characteristics of high strength and high thermal conductivity, and can also be used for welded joint discs and the like used on spot-welding electrodes and stainless steel besides being used for manufacturing injection moulds and nonferrous metal low-pressure die casting moulds with high thermal conductivity.

The present invention relates to a lead-free, bismuth-free free-cutting phosphorous brass alloy and its method of manufacture. The alloy comprises: Cu; Zn; 0.59 to 1.6 wt % P; and other elements in the amount of 0.005 to 0.6 wt %, which comprise at least two elements selected from the group consisting of Al, Si, Sb, Sn, Rare earth element (RE), Ti and B, and the balance being unavoidable impurities. The phosphorous brass alloy contains a combined wt % of Cu and Zn of between 97.0 wt % and 99.5 wt %, within which the content of Zn is above 40 wt %. Considering the solid solubility of P in the matrix of copper will be decreased rapidly with the temperature decrease and form the brittle intermetallic compounds Cu₃P with Cu, the present invention relies upon P to ensure excellent cuttability of the invented alloy. The invented alloy is reasonably priced, and has excellent cuttability, castability, hot and cold workability, dezincification corrosion resistance, mechanical properties and weldability. The phosphorous brass alloy is a useful alloy for spare parts, forging and castings that require cutting, and particularly in forging and castings for low pressure die casting that requires cutting, grinding, welding and electroplating. The phosphorous brass alloy may also be used for faucets, valves and bushings of water supply systems, and for bar and wire materials that require high corrosion resistance and compactness.

The present invention provides a lead-free free-cutting aluminum brass alloy and its manufacturing method. The alloy comprises: 57.0˜63.0 wt % Cu, 0.3˜0.7 wt % Al, 0.1˜0.5 wt % Bi, 0.2˜0.4 wt % Sn, 0.1˜0.5 wt % Si, 0.01˜0.15 wt % P, at least two elements selected from the group of 0.01-0.15 wt % Mg, 0.0016-0.0020 wt % B, and 0.001-0.05 wt % rare earth elements and the balance being Zn and unavoidable impurities. The inventive alloy has excellent castability, weldability, cuttability and corrosion resistance. It is suitable for low pressure die casting, gravity casting, horizontal continuous casting, forging and extrusion. Its metal material cost is lower than bismuth brass. It is particularly applicable for components used in drinking water supply systems and other structural components. It is a new environmentally-friendly free-cutting aluminum brass alloy.

The invention is concerned with the liquid supply method of the pressure die casting machine for magnesium alloy die-casting, it is: the magnesium alloy liquid, which the liquid surface is lower than the outputting opening of the proportioning pump in the melting furnace, passes the outputting opening to enter the pressure chamber from the bottom pressure chamber of the pressure die casting machine by the proportioning pump. The invention solves the problem of the existing method that is easy to be oxidation and mix air, provides the method that non-impact, less oxidation, non-air mix, to improve the quality of the magnesium alloy die cast, reduce the cost.

The invention relates to a casting technology for bearing retainers, in particular to a near-net-shape casting technology for bearing retainers, which solves the problem of low using rate of metals when thick bushing roughcasts are integrally cast and is suitable for casting bearing retainers by use of ductile iron and nonferrous alloys. The casting technology comprises the following steps: (1) the foam patterns are made into dies with shape and size close to the final parts; and a back draft upper flask with integrated modeling and exhausting functions is adopted; (2) after mould closing and sealing treatment on a low-pressure die-casting machine, mold filling and casting are carried out; when casting, the vacuum evacuation valve connected with the evacuation box is opened first for vacuum pumping of the cast cavity, and then grade turbocharged process is used for filling and casting, so as to keep the castings stay at a conditions surrounded by continuous supplement of liquid metal from the pouring basin and lift tube under a high pressure until near-net-shape castings are obtained after full solidification. The casting technology has the advantages that the using rate of metal is improved to 85% to 90% from 15% to 20% and the aims for green casting, cleaner production and sustainable development in accordance with the national standards are realized.

A method for producing a cage rotor for an asynchronous machine is provided. The method includes providing a rotor body having a conductor bar segment in which conductor bars are provided, producing conductor bar slots in the conductor bar segment, wherein one conductor bar slot is provided for each of the conductor bars and producing short circuit ring recesses for short circuit rings, wherein the conductor bar slots each open into the short circuit ring recesses, pressure die casting cage material in the conductor bar slots, in situ, so that the conductor bars are formed of the conductor bar material in the conductor bar slots and the short circuit rings are formed in the short circuit ring recesses, and generating an area in the conductor bar material and the rotor body material including a metallurgical bond between the conductor bar material and the rotor body material at interfaces between the conductor bars and the rotor body.

The invention discloses a manufacturing technology and device for a shell of an amorphous alloy watch and belongs to the technical field of metal casting. The manufacturing device is composed of a raw material melting system, a mold system, a pressure casting system and a non-vacuum system. The non-vacuum amorphous alloy material machining device is designed through a vertical pressure casting technology. The raw material melting system is used for achieving the purpose of fast liquefying of amorphous alloy. The mold system is used for systematically achieving the purpose of fast solidification and one-time molding of the shell of the watch. The vertical pressure casting system is used for achieving the purpose that amorphous alloy liquid is rapidly and perpendicularly pressed into a mold cavity of the shell of the watch, and the problem that quality is affected due to bubbles generated in a casting is solved. The non-vacuum system is used for achieving the purpose of insulating air in the melting and pressure casting processes. The manufacturing device for the shell of the amorphous alloy watch is made of granular amorphous alloy raw materials containing zirconium, aluminum, copper, nickel and zinc, and the manufactured shell of the watch has the gloss of precious metal, namely platinum and is high in hardness and invariant in color. The device is suitable for being used as a universal device for manufacturing amorphous alloy products through one-time molding.

The present invention supplies a lead-free free-cutting silicon brass alloy with high zinc which preferably comprises 35.0 to 42.0 wt % Zn, 0.1 to 1.5 wt % Si, 0.03 to 0.3 wt % Al, 0.01 to 0.36 wt % P, 0.01 to 0.1 wt % Ti, 0.001 to 0.05 wt % rare earth metals selected from the group consisting of La and Ce, 0.05 to 0.5 wt % Sn, and/or 0.05 to 0.2 wt % Ni, and the balance being Cu and unavoidable impurities. The invented alloy is excellent in castability, weldability, cuttability, electroplating properties, corrosion resistance, mechanical properties. The alloy is especially applicable in castings which need cutting and welding under low pressure die casting, such as castings for faucet bodies in the water supply system. The alloy is also suitable for use in components which are produced from casting ingots by die forging.

The invention relates to a motor rotor pressure cast aluminium die comprising an upper die part, a lower die part and a rotor core part, wherein the upper die part comprises a guide post, a cushion plate, an upper die, a washer and a bolt, the upper die is connected with the cushion plate by the guide post, and one end of the guide post is fixed by the washer and the bolt; the lower die part comprises a middle die, a pressure plate and a lower die, wherein the middle die and the pressure plate are respectively arranged into an inner hole and an outer circle position of the lower die; the rotor core part comprises a tippy key, a guide sleeve, a dummy spindle and a rotor core, wherein the tippy key is inlaid into a groove of the dummy spindle, the dummy spindle is arranged into a positioning hole of the lower die, and the rotor core is sleeved into the dummy spindle when being guided by the tippy key and is sleeved into the guide sleeve after reaching technological required weight. Because exhaust grooves are reasonably arranged on the cushion plate of the motor rotor pressure cast aluminium die, air and aluminium-water residual gas are effectively discharged in the motor rotor pressure cast aluminium die in order to solve a cast aluminium roller shrinking phenomenon; and when demoulding, a cast aluminium roller is ejected by a pressure die casting machine, and the middle die automatically stays into the lower die to reduce labor intensity of workers and increase production efficiency.

The invention discloses a ceramic sprue gate bushing for low pressure casting of aluminum alloy and a manufacturing method of the ceramic sprue gate bushing for low pressure casting of aluminum alloy. The bushing is tubular and comprises a bushing body and a coating layer, wherein the bushing body is made of composite ceramic materials of aluminum oxide and aluminum titanate, and the coating layer is an aluminum titanate ceramic coating layer. The manufacturing method includes the steps that first, aluminum oxide raw material powder, titanium dioxide raw material powder and stabilizing agents are fully mixed to prepare base powder; second, the base powder is roasted at the temperature ranging from 1350 DEG C to 1400 DEG C so that aluminum titanate powder can be obtained; third, the aluminum titanate powder is added into aluminum oxide raw material powder according to the weight fraction ranging from 6 percent to 13 percent to be fully mixed so that mixed powder can be obtained; fourth, after the mixed powder is palletized, compression molding is performed, and pre-sintering is performed; the aluminum titanate powder, PVA glue and water are mixed to form a sizing agent; sixth, the pre-sintered body is placed in the sizing agent, and soaked in the sizing agent and lifted out of the sizing agent several times, and then the pre-sintered body is dried; seventh, a sprue gate bushing containing the aluminum titanate coating layer is placed in a furnace and sintered at the temperature ranging from 1450 DEG C to 1650 DEG C and then the final product can be obtained.