42results about How to "Clear edges and corners" patented technology

The invention discloses a preparation method of a high-plasticity Ni-Mn-In alloy, and relates to the preparation method of the alloy. The preparation method aims at solving the problem that the Ni-Mn-In alloy series is brittle. The method comprises the following steps of: firstly, weighting; secondly, smelting; and thirdly, preparing the high plasticity Ni-Mn-In alloy. Since the Co element is added, the compression fracture strength and fracture strain of the Ni-Mn-In alloy can be obviously improved, and the method is used for preparing the high-plasticity Ni-Mn-In alloy.

The invention discloses a method for plating boron carbide on a diamond surface. The method comprises the following steps: boriding on the diamond particle surface under the conditions that the vacuum degree is less than 100 Pascal, the temperature is preserved to 300 DEG C for 30 minutes and the temperature is preserved to 1200 DEG C for 3-12 hours, thereby plating a boron carbide film on the diamond surface. According to the diamond of which the surface is plated with the boron carbide film prepared by the invention, the binding force between a metal matrix and the diamond can be improved, the erosion resistance of the diamond to oxygen, iron, nickel and cobalt can be greatly improved, and the phenomena such as oxidation and graphitization of the diamond in the process of preparing a diamond-impregnated drill bit can be effectively avoided, so that the diamond inlaid into the metal matrix is complete in appearance, clear in edges and stable in performance. Therefore, the abrasive ratio of the manufactured appliances is greatly improved, and the service life is obviously prolonged.

The invention provides a formula of a GaAs semiconductor material etching liquid. The formula comprises: citric acid, hydrogen peroxide and deionized water. First, citric acid and deionized water are mixed according to a predetermined proportion, and then hydrogen peroxide is added and mixed uniformly. Specifically, the etching liquid is prepared by adding 1g of a citric acid crystal into 1ml of deionized water, stirring them uniformly, and then adding hydrogen peroxide with a concentration of 30%. The volume ratio of the sum of the citric acid crystal and the deionized water to the hydrogen peroxide is 66:1. The use of the citric acid formula provided in the invention can control the etching rate to a GaAs material at 2.0nm/s-2.8nm/s.

The invention relates to a battery cover manufacturing method and a mobile terminal. The battery cover manufacturing method comprises the following steps: S110, manufacturing a glass substrate which comprises a plurality of planes or curved surfaces, and enabling the adjacent planes or curved surfaces to be connected through a curved surface with the curvature radius not smaller than 0.5 mm; S120,performing surface treatment on a polymeric membrane material with the light transmittance of not less than 75% to form a decorative layer; and S130, coating one side, back to the decorative layer, of the polymeric membrane material with an adhesive, adhering one side, coated with the adhesive, of the polymeric membrane material to the glass substrate, and vacuumizing the glass substrate adheredwith the polymeric membrane material to adhere the polymeric membrane material to the glass substrate, thereby obtaining the battery cover. Edges and corners of the glass substrate are clear, and different shadows exist when the glass substrate is viewed at the same angle, so that the battery cover has a diamond cutting surface effect. The transparent polymer film material can be completely attached to the glass substrate, and the decorative layer of the polymer film material is overlapped with the light and shadow of the glass substrate, so that the appearance expressive force of the batterycover is greatly improved.

The invention relates to a segmental mold aluminum-titanium-boron aluminum-magnesium alloy pattern block casting material and a production method thereof. According to the technical scheme, the casting material is prepared from the following components in parts by weight: 99.85% of pure aluminum ingots, 0.20% of silicon, 0.10% of iron, 0.10% of copper, 0.10% of manganese, 3.80% of magnesium, 0.01% of chrome, 0.0050% of nickel, 0.0047% of zinc, 0.000108% of beryllium, 0.0032% of bismuth, 0.0108% of lithium, 0.00063% of sodium, 0.0030% of titanium alloy powder T15.2, and 0.0025% of aluminum-titanium-boron ALTi5B1. The casting material has the beneficial effects that: 1, a die casting is precise in cooling shrinkage contour curved surface and good in surface precision, and has no defects such as pinholes, shrinkage porosity, cold shut, and the like; 2, pattern edges and corners are clear, and the surface smoothness is good; 3, the casting material is corrosion-resistant, does not stick scourings, and resists blast cleaning; 4, the casting material is high in strength, good in toughness, and uneasy to have plastic deformation after being machined; 5, the casting material is wear-resistant, long in service life, and resists die opening-closing impact; and 6, an aluminum-titanium-boron aluminum-magnesium alloy is taken as an independent ingredient, the element proportioning of the alloy is accurate, and the rate of finished products is high, thereby reducing the cost spending of enterprises.

The invention relates to an extrusion molding process method for a sand mold or a shell for casting. The method comprises the following steps of 1, preparing raw materials, wherein the raw materials comprise a casting sand mold, a surface modifying material and an adhesive; 2, metering the raw materials and adding the raw materials into a loading cylinder, and rapidly propelling and extruding theraw materials in the loading cylinder to a mold cavity through extrusion propelling forming equipment; 3, forming the mold or the shell through curing forming; and 4, bonding and assembling the formedmold or shell after the formed mold or shell is subjected to inspection and modification so that a casting mold capable of pouring can be formed. According to the method, the sand mold for casing isadopted to carry out rapid forming inside an extruding propelling mold cavity, so that the method has the advantages that the extrusion propelling forming equipment is simple structure, an air storagebag is not required, and safety and reliability can be achieved; furthermore, the propulsion forming efficiency is high, and rapid and efficient filling type compaction can be achieved; and finally,the mold (shell) is distinct in edge angles, high in compactness and good in dimensional stability.

The present invention relates to a stainless steel section material for making spring door or show-window. Said section material is characterized by that the side edge of said section material can be made into the concavo-convex form through a certain production process. Said production process includes the following steps: annealing stainless steel coiled material, spreading said coiled material, cutting, rolling and forming, surface treatment, sticking protective film on its surface and packaging.

The invention discloses an arc shaped non-delaminating epaulet and an arc shaped non-delaminating armband as well as a production method thereof, which belong to the field of clothing accessories. The epaulet comprises a shoulder badge and grade strips which are arranged on the surface of an epaulet plate, a belt loop arranged on the rear side of the epaulet plate, and a locking hole with an opening, wherein the shoulder badge and the grade strips are all protruded out of the epaulet plate, and the epaulet plate has uniform and upward radin, and is produced by a composite surface layer, a lining board, and a composite bottom layer which are adhered through hot melt glue sheets and then are sewn and shaped; the armband comprises a body, a pattern layer on the surface, a terylene tape on the bottom surface, and a nylon yarn buckle tape, and the body of the armband has uniform and upward radin, and is produced by a surface layer, an intermediate thermoplastic rubber lining, and a bottom layer which are adhered through the hot melt glue sheets and then are sewn and shaped. The epaulet and the armband are produced by the instantaneous heat setting at a temperature of between 110 and 130 DEG C and the instantaneous cold forming at a temperature below 25 DEG C. The epaulet and the armband have the advantages of shape-keeping whole shape, clear edges and corners, regular molding, neat appearance, close attachment of various layers of materials, no bubbling, no delamination, and no deformation after washing for 20 times.

The invention discloses a back decorative plate of a generating set. The back decorative plate comprises a back decorative plate body and an oblique surface part; the back decorative plate body is provided with plural mounting holes; the oblique surface part is arranged at the periphery of the back decorative plate body annularly; the top part of the oblique surface part extends backwards to form a bulge. The back decorative plate of the generating set is beautiful in shape, clear in corner, light in weight, convenient to produce and assemble, and simple and convenient to operate and maintain, can decorate and beautify the generating set, and has appropriate area.

The invention relates to an injection mold and specifically discloses a combined auto parts injection mold, which comprises a base equipped with a cavity. A male die and a female die are successivelyarranged from top to bottom inside the cavity. The bottom of the cavity is provided with a limited pillar. The sidewall of the base is provided with a location hole. By inserting a positioning pin into the location hole, the male die can be fixed in the cavity. A boiling water tank is arranged below the female die. Left and right sides of the female die are provided with valve cores which are slidingly connected to the base. The female die is equipped with spacing grooves for the valve cores being inserted therein. When the female die falls on the limited pillar, there is an excess material gap between the male die and the female die. When the valve cores are inserted in the spacing grooves, the male die and the female die cooperate to form an enclosed mold cavity. The top of the base is provided with a cover plate for sealing the cavity. A water chamber is arranged between the cover plate and the male die. The base is provided with a water inlet, and the cover plate is provided with awater outlet. When the valve cores are inserted in the spacing grooves, the water inlet, the water boiling tank, the water chamber and the water outlet are communicated. The mold of the invention ishelpful for letting plastic enter the narrow gap of the mold cavity so as to endow a workpiece with clear edges and corners.

The invention discloses a double perovskite type near-infrared luminescent material, the chemical composition is Rb2NaY (1-x) F6: xCr < 3 + >, x is the mole percentage coefficient of doped chromium ions relative to yttrium ions, and 0 lt; x is greater than or equal to 0.15; the preparation method comprises the following steps: (1) weighing 80-85 parts of rubidium fluoride, 15-20 parts of sodium fluoride, 55-40 parts of yttrium fluoride and 0-6 parts of chromium fluoride; (2) adding the weighed rubidium fluoride, sodium fluoride, yttrium fluoride and chromium fluoride into a mortar, and grinding for more than 30 minutes to fully and uniformly mix the raw materials; and (3) putting the ground raw materials into a tubular furnace, and reacting at the high temperature of 650-700 DEG C for 8-10 hours to obtain the product. The luminescent material capable of emitting near-infrared light is prepared by taking positive trivalent transition metal Cr < 3 + > as doping ions and double perovskite fluoride as a matrix.

The invention relates to the technical field of battery processing, and particularly discloses an injection molding method for plate grids. The method comprises the following steps that 1, the side wall of a die cavity is cleaned, and an upper die and a lower die are combined to form the complete die cavity; 2, a pump body and the entrance section are disconnected, and a water flow cooling channeland a vacuum pump are connected; 3, materials are injected into the die cavity, and meanwhile a jet channel is vacuumized; 4, the pump body and the entrance section are connected, cooling water is introduced into the water flow cooling channel continuously till a plate grid inside the die cavity is cooled and molded, the pump body is turned off, and water injection into the water flow cooling channel is stopped; 5, the upper die and the lower die are disassembled, and the mold plate grid is taken out from the die cavity. According to the injection molding method, when materials are injected into the die cavity, the space of the die cavity is larger than the space, formed when cooling water is injected, of the die cavity, the purpose that materials are extruded when the die cavity is decreased after materials are injected into the die cavity, and materials can enter the small interval so that the molded plate grid can have the clear corner angles.

The invention discloses a molding knife for a highlight machine. The molding knife comprises a knife handle and a cutting head formed at one end of the knife handle, wherein the cutting head comprisesa first front angle knife, a first rear angle knife, a second front angle knife and a second rear angle knife, wherein a first separation part is arranged between the first front angle knife and thefirst rear angle knife, a second separation part is arranged between the second front angle knife and the second rear angle knife, a narrowed first connecting part is arranged between the first rear angle knife and the second front angle knife, a narrowed second connecting part is arranged between the second rear angle knife and the first knife handle, the first front angle knife inclines towardsthe first separation part through the front end surface of the cutting head, and the first rear angle knife inclines towards the first connecting part through the first separation part; and the secondfront angle knife inclines towards the second separation part through the front connecting part, and the second rear angle knife inclines towards the second connecting part through the second separation part. By virtue of the common effect of multiple angle-cleaning cutting knives, the molding knife can meet the angle-cleaning requirements of multi-chamfer parts and can be used for carving relatively stereoscopic and resplendent patterns, the machined side wall is smooth, fluent and burr-free, and corner angles are clear.

The invention discloses a color-adjustable perovskite type chloride luminescent material, the chemical composition is Rb2Sn1-xCl6:xSb<3+>, x is the molar percentage coefficient of doped Sb<3+> relative to tin ions in a matrix, and x is more than 0 and less than or equal to 0.1. The perovskite type chloride is an inorganic compound of which the anion of a matrix material is chloride ion and the structure is perovskite. According to the color-adjustable luminescent material disclosed by the invention, when the material is excited under different wavelengths, the position of the strongest emission peak corresponding to the material changes correspondingly. The preparation method comprises the following steps: (1) weighing 10-20 parts of a hydrochloric acid solution, 300-400 parts of tin chloride, 200-300 parts of rubidium chloride and 0-30 parts of antimony oxide; (2) sequentially adding tin chloride, rubidium chloride and antimony oxide into a hydrochloric acid solution, and magnetically stirring to obtain a precipitate; and (3) washing the precipitate with ethanol, and drying to obtain the product. The color-adjustable luminescent material is prepared by taking Sb<3+> as a luminescent center and perovskite chloride as a matrix.

The invention relates to a method for preparation method for a high-precision drilling bit, and belongs to the technical field of casting. The preparation method includes shell preparing, roasting, melting casting and postprocessing, wherein the shell preparing comprises the steps: spraying a coating on a surface of a preformed fusible wax molding, sandblasting, drying, then dewaxing, preparing a shell green body, spraying the coating, and repeating the sandblasting and drying step for 2 to 5 times; the roasting comprises the steps: putting the shell green body into a roasting furnace, and roasting under a vacuum degree with 0.08 to 0.20MPa to obtain a shell. The drilling bit prepared by the invention is small in error, accurate in size and smooth in surface.