281results about How to "Improve process yield" patented technology

A plasma processing apparatus wherein a layer structure consisting of plural layers formed in stack one upon another on a semiconductor wafer placed on the sample holder located in the process chamber, is etched with plasma generated in the process chamber by supplying high frequency power to the electrode disposed in the sample holder, the apparatus comprising a ring-shaped electrode disposed above the electrode and around the periphery of the top portion of the sample holder, an outer circumferential ring of dielectric material disposed above the ring-shaped electrode and opposite to the plasma, and a power source for supplying power at different values to the ring-shaped electrode depending on the sorts of layers of the layer structure.

A method for designing the non-air-gap smooth-filling casting features controlling the filling smoothness, lowering the filling speed, preventing air and oxidized film from coming in molten metal, reducing the size of pouring channel, and increasing the technological output rate. Its casting system has a pouring cup, a plug rod system connected with said pouring cup and opened when filled molten metal in the pouring cup reaches its 1/2-1/3 height, and the arc corner between vertical and horizontal pouring channels. Its pouring speed is 0.5-1.0 m/s.

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 provides a casting method for an impeller made of a super duplex stainless steel 5A material. The method comprises the steps of preparation of a casting mould and a sand core, specifically, the casting mould and the sand core are prepared in the manner that alkaline phenolic resin is added to crude sand, the casting mould is provided with an impeller cavity for storing the sand core, and a dead head is internally provided with a ceramic foam filter; casting and pouring; and sand shakeout and heat treatment of a heat-filling furnace, and an impeller finished product is obtained. The temperature ranges of precipitation of brittle phases including Eta, Chi and Sigma can be avoided, precipitation of the brittle phases by an impeller casting structure is avoided, crack defects of an impeller casting are overcome fundamentally, density of the casting structure can also be guaranteed, and the yield rate of a casting finished product can be increased to 96% or above; and meanwhile, the casting production cost is greatly lowered as the technological yield is increased, and the heat-filling furnace process is implemented.

The invention discloses a manufacturing technology and device for an improved forged steel roller neck high nickel chrome molybdenum alloy cast composite roller. The roller comprises, by mass percent, 3.0%-3.6% of C, 0.60%-1.20% of Si, 0.30%-1.20% of Mn, 3.0%-5.0% of Ni, 1.0%-2.0% of Cr, 0.40%-1.2% of Mo, 0.1%-2% of W, 0.5%-1.0% of Cu, not larger than 0.05% of P, not larger than 0.03% of S, 0.04%-0.06% of Mg, 0.1%-0.3% of Nb, 0.1%-0.30% of Ti, 0.2%-0.6% of V, 0.05%-0.2% of B, 1.5%-2.5% of Ba, 1%-2% of Ca, 1%-3% of Sb, 0.02%-0.18% of N, 1.0%-2.0% of Y/RE and the balance Fe and inevitable micro elements. Yttrium base rare-earth nodulizing and Ba, Ca, and silicon iron composite inoculation are adopted, Nb, Ti, V, B and Sb are added for modification, and the mechanical performance of the roller is improved; by the adoption of the forged steel roller neck, the strength of the roller is improved, an induction heater is adopted to carry out in-mold whole heating casting on a core stick, a water cooled crystallizer is molded, a composite layer interface can be dynamically controlled, the technology is simple, the efficiency is high, power consumption is small, the cost is low, no composition segregation exists, and the service life of the roller is long.

A full-automatic casting machine for aluminium piston is composed of main body, external mould and edge core unit, mould pushing unit, manipulator for taking cast part, central core unit, rotating unit, manpulator for inlaying steel plates, steel plate chamber, filter net installing unit, and casting robot. Its advantages are high autoamtic level, productivity, and quality of castings.

The invention provides an optimized process for manufacturing a saloon car clutch pressure plate casting on a vertical modeling production line. The process comprises the following steps of mulling sand, modeling, melting burden, inoculating iron, pouring, cooling, opening case and clearing casting, wherein in the modeling step, two and more raw castings are horizontally and asymmetrically arranged; a pouring iron liquid enters into a straight pouring channel through a pouring cup and an upper cross channel; and the straight pouring channel enters into a lower cross channel by passing through the middle of a casting cavity and then asymmetrically enters into the cavity from the lower side of the cavity. The pressure plate casting produced by using the process of the invention has a single-cast coupon tensile strength equal to or more than 250 MPa, a casting body tensile strength equal to or more than 200 MPa and the casting body hardness from 170 to 241HBS. The product metallographic structure mainly uses the A type graphite; the length of the graphite is 4 to 6 level; the matrix contains more than 95% of small pearlites and less ferrites; and all the parts of the casting have no casting flaw and meet the technical requirements of the saloon car clutch pressure plate casting.

The invention discloses a modified manufacturing process for a high-chromium cast iron composite roll through a forged steel roll neck and equipment. The material comprises, by mass, 3.0%-3.6% of C, 0.60%-1.20% of Si, 0.30%-1.20% of Mn, 3.0%-5.0% of Ni, 1.0%-2.0% of Cr, 0.40%-1.2% of Mo, 0.1%-2% of W, 0.5%-1.0% of Cu, 0%-0.05% of P, 0%-0.03% of S, 0.04%-0.06% of Mg, 0.1%-0.3% of Nb, 0.1%-0.30% of Ti, 0.2%-0.6% of V, 0.05%-0.2% of B, 1.5%-2.5% of Ba, 1%-2% of Ca, 1%-3% of Sb, 0.02%-0.18% of N, 1.0%-2.0% of Y/RE and the balance Fe and inevitable microelements. Yttrium-based rare earth nodulizing and compound inoculating of Ba, Ca and silicon iron are adopted, and modification treatment is conducted by adding Nb, Ti, V, B, and Sb, so that the mechanical property of the roll is improved. The strength of the roll is improved through the forged steel roll neck. Overall in-mold heating and fusion casting are conducted on a core rod through an induction heater. Forming is conducted through a water cooled crystallizer. A composite layer interface can be dynamically controlled. The process is simple, the efficiency is high, power consumption is small, the cost is low, composition segregation is avoided, and the service life of the roll is long.

The invention relates to the field of piston casting, in particular to a casting process for a piston, and provides a casting process and a casting device to overcome the defects of shrinkage cavity and shrinkage porosity on a ring slot part near a pin hole. The process and the device are suitable for casting of pistons in gasoline engine industry, diesel engine industry, compressor industry and other industry. In the process, an open type annular feeding passage is formed at the bottom of the piston, and an annular channel opening angle is changed by adjusting a sectorial core at the bottom of the piston, so that the full and reasonable feeding effect is achieved, and the casting yield reaches over 96 percent; and by adopting a blind riser, the process productive rate is improved. The process has the advantages of saving energy, reducing consumption, along with high yield, high process productive rate, low cost and the like.

The invention relates to an arrangement method and a structure of a bridge electrode. The arrangement method of the bridge electrode comprises the following steps of: providing a substrate; forming a transparent conductive layer on the substrate, wherein the transparent conductive layer is provided with a plurality of pattern blocks which are arranged adjacent to each other; forming an alignment film layer on the substrate, wherein the alignment film layer is provided with a plurality of bridge grooves used for crossing among the plurality of pattern blocks; forming a conductive layer on the substrate, wherein the conductive layer is provided with a plurality of electrical conductors which are respectively arranged on the plurality of bridge grooves, the plurality of electrical conductorsof the conductive layer are formed by an optical compensation photomask together with over exposure or over development; and forming a protective layer on the substrate, wherein the protective layer is used for increasing optical transmittance and protecting the substrate, the transparent conductive layer, the alignment film layer and the conductive layer.

The invention refers to a kind of pressing founding and casting method, which is used to produce colored alloy foundry goods. The realizing method is: the alloy fusant enters the pressure room through batch casting device and casting aperture sliding block, after the casting, the gate sliding block closes the pressure room, the indenter up runs, the alloy fusant is formed, pressure maintained, condensed under pressure. The efficiency is high, the quality is good, and the process reclaiming rate is high.

The invention discloses a manufacturing technique and equipment for a high-performance composite roller shaft. The manufacturing technique comprises the steps that a mandril installed in a combined water-cooling crystallizer is integrally heated to 840-1100 DEG C through an induction heater; molten liquid of a working layer of the roller shaft is poured into the mandril, and then the mandril is continued to be heated for 10-50 minutes; a lifting device is stared so as to lift the heater at a certain speed for 5-15 minutes, and the heater is stopped in the position of a heat-insulating ring; and heating is continued for 10-50 minutes, feeding is conducted on a dead head, and after heating is stopped, cooling is conducted for 30 minutes to 24 hours through water. When the composite roller shaft is manufactured through the manufacturing technique, the number of controllable technological parameters is small, the interface of a composite layer is easy to control, the technique is simple, the efficiency is high, the power consumption is low, the cost is low, the composite layer is free of composition segregation, and the service life of the roller shaft is long; the defect of a centrifugation method that structure segregation is prone to occurring is overcome, and the problems of a CPC method and an ESR method that the production technique is complex, and the cost is high are solved.

The invention discloses a casting method capable of preventing a precise investment casting from generating hot-spot shrinkage holes. The casting method comprises the following steps that: a dead head position is determined according to a conventional method, and a dead head metal patch is replaced by a shell patch at a part, needing to be provided with the dead head metal patch, of the precise investment casting, wherein the material of the shell patch is mortar paste prepared from back layer slurry, back layer powder and back layer sand in a mass ratio of 1:1:5; the shell patch is bonded by the mortar paste, wherein before bonding, a layer of back layer slurry is brushed at a part needing to be bonded with the mortar paste at first, and then the wedge-shaped shell patch is formed according to a method that the thickness at a dead head is greater than that at a hot spot; after that, shell roasting and pouring are performed. Due to the action of the shell patch, the dead head and the hot spot keep a good feeding channel, thus realizing a mode of sequentially solidifying from the hot spot to the dead head, and then preventing the hot spot of the casting from generating the shrinkage holes. According to the method, patch metal for the casting is saved, the product yield of the process increases, and the visual quality of the casting is guaranteed.

The invention discloses a manufacturing technology and device of a forged steel roller neck alloy nodular cast iron composite roller. The forged steel roller neck alloy nodular cast iron composite roller comprises, by mass percent, 3.2%-3.9% of C, 1.6%-2.1% of Si, 0.4%-0.8% of Mn, not larger than 0.05% of P, not larger than 0.03% of S, 0.2%-0.5% of Cr, 0.3%-0.7% of Mo, 1.4%-2.0% of Ni, 0.04%-0.06% of Mg, 0.06%-0.2% of Nb, 0.1%-0.25% of Ti, 0.2%-0.5% of V, 1.5%-2.5% of Ba, 1%-2% of Ca, 1.0%-2.0% of RE and the balance Fe. Rare-earth nodulizing and Ba, Ca and silicon iron compound inoculation are adopted, and Nb, Ti and V are added for modification, so that the mechanical property of the roller is improved, a forged steel roller neck is adopted to improve the strength of the roller, and an induction heater is adopted to carry out in-mold whole heating casting on a forged steel or cast steel core stick; and a combined type water cooled crystallizer is molded, a lifting device lifts the heater upwards at a certain speed to form area directional solidification, a composite layer interface is dynamically controlled, the technology is simple, the efficiency is high, the electric consumption is small, the cost is low, no composition segregation exists in the composite layer, and the service life of the roller is long.

The invention discloses a metallurgical bonding double-metal stainless steel cladding reinforcing steel bar and a preparation process thereof. The metallurgical bonding double-metal stainless steel cladding reinforcing steel bar comprises a carbon steel core part and a stainless steel cladding. The composite forming process comprises the following steps: integrally heating an outer-layer stainless steel pipe to 600 to 1000 DEG C by using an induction heater, pouring into inner-layer carbon steel, performing metal liquid casting and manufacturing an interface metallurgical bonding cladding type double-metal composite blank; hot-rolling the cast double-metal blank to form cladding double-metal round steel and threaded steel. The metallurgical bonding interface of the stainless steel layer and the carbon steel core is formed by casting, and the advantages of high bonding strength, excellent processing property, dense structure, high quality, few procedures, low cost, high efficiency and the like are achieved. The integral stainless steel reinforcing steel bar is replaced by the double-metal reinforcing steel bar, so on the premise of guaranteeing the corrosion-resistant characteristic of the reinforcing steel bar, the stainless steel material is saved, the engineering cost is reduced, the strength of the reinforcing steel bar is effectively improved, waste of resource and energy and environmental pollution are reduced, and a wide application prospect is achieved.

The invention provides a die of a cast aluminum shell for a high pressure switch, and a method for producing the cast aluminum shell. The die of the cast aluminum shell for the high pressure switch comprises a metal die and a sand core; and the die is characterized in that: a lead-in port connected with a crucible liquid raising pipe is arranged on a bottom plate; a straight pouring channel at the bottom of the sand core is connected with the lead-in port; an internal pouring channel is arranged on the straight pouring channel; the metal die is wrapped at the external side of the sand core; araiser core is arranged on the top of the metal die; the inner side of the raiser core and the outer side of the upper part of the sand core form a raiser; and an embedding block is longitudinally arranged at the side of the sand core. The method comprises the following steps of: melting aluminum alloy, assembling the die, casting at low pressure, and taking out the casting component. By using the technical scheme of the invention, the method is simple in operation, easy to control, high in product surface quality, high in technique yield, high in air tightness inspecting yield, and low in production cost.

A chip package structure comprises a chip, a package cover board and a bound layer, wherein, the chip is provided with a drive surface which is provided with an image sensing element and a plurality of connection cushions positioned on the periphery of the sensing element. In addition, the package cover board is arranged above the drive surface and comprises a baseplate and a support part positioned on the baseplate, wherein, a holding room is left on the baseplate by the support part, the support part contacts with the drive surface of the chip to ensure the image sensing element on the drive surface arranged in the holding room. Besides, the bound layer is arranged between the support part and the drive surface. The chip package structure of the invention has the advantages of high rate of finished products of technique, low cost of production and good optical penetrating power.

The invention discloses a production technology for an as-cast spheroidal graphite iron casting QT600-7 and belongs to the technical field of casting. The production technology comprises the steps of feeding Q10 raw iron, Q235 waste steel and a foundry returns into a furnace for smelting to obtain liquid iron; putting Cu, Ni and an RE-Mg balling agent as well as a SiBaCa nucleating agent at the bottom of a foundry ladle, and pouring the smelted liquid iron into the foundry ladle for balling; adding the powdered SiBaCa nucleating agent along with the flow during ladle transferring of the balled liquid iron; pouring the nucleated liquid iron into a casting mold to obtain the as-cast spheroidal graphite iron casting QT600-7. The material intensity of the spheroidal graphite iron casting produced by the production technology is higher than or equal to 600Mpa, and the elongation rate is greater than or equal to 7 percent. The as-cast spheroidal graphite iron casting QT600-7 has comprehensive performance of high elongation rate of ferrite spheroidal graphite iron and high intensity of pearlyte spheroidal graphite iron; the pearlyte content is 35-60 percent, the balling rate is about 85 percent, and stable production that the as-cast spheroidal graphite iron casting 600-7 has standard performance is realized.