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

The invention discloses a high-precision casting die. The casting die is a resin sand die. The resin sand die comprises an upper moulding box, a lower moulding box, a cavity and a runner; the cavity is positioned between the upper moulding box and the lower moulding box; the runner communicates with the cavity and a sprue gate; a graphite coating is attached to the inner wall of the cavity; and the resin sand die comprises the following components in percentages by mass: 70%-75% of quartz sand, 14%-18% of furan resin, 7%-10% of a curing agent, and 3%-5% of a silane coupling agent. Through the mode, the high-precision casting die has the features of high hardness and high precision, so that the casted castings are smooth in surface, clear in edges and corners and high in dimensional precision.

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 a method for forging large cake pieces by means of combining upsetting and polishing with flat anvil spin edge forging. The method includes the steps: firstly, performing first cake upsetting and round polishing on a blank via an upper flat anvil, an upsetting plate and a lower rotating plate, to be more specific, performing upsetting on the blank via the upper flat anvil, the upsetting plate and the lower rotating plate, when the diameter of the blank is close to the maximum width of the upsetting plate, removing the upsetting plate and performing spin pressing on the center of the blank through the upper flat anvil to enable the thickness of the blank to reach certain specifications, subjecting the blank to outer round polishing via polishing pliers, the upper flat anvil and the rotating plate, and then putting the blank back to a heating furnace; secondly, performing second flat anvil edge forging, center flattening and round polishing, to be more specific, performing layered spin pressing and edge forging on the blank via the polishing pliers, the upper anvil and a lower anvil, performing centered layered spin pressing on the blank via the upper flat anvil and the rotating plate, and performing outer round polishing on the blank via the polishing pliers, the upper flat anvil and the rotating plate. By the method, the problems that forging difficulty is high and concave center defects at the centers of the cake pieces are caused easily due to the fact that forging is performed by a center forging method are solved effectively.

The invention relates to an aluminum magnesium alloy pattern ring of a radial tire segmented mold. The production method of the aluminum magnesium alloy pattern ring comprises the steps that the pattern ring comprises the components in percentage by weight as follows: 99.80% of pure aluminum, 0.003% of copper, 0.01% of magnesium, 0.002% of zinc, 0.003% of silicon, 0.001% of manganese and 0.001% of titanium alloy powder T15.2; a gas melting furnace is used, and pure aluminum is put into a graphite crucible for warming and melting; the temperature is raised to 950 DEG C, copper wires and a manganese agent in the proportion are put into melted pure aluminum; the temperature is lowered to 730 DEG C, magnesium, zinc, silicon, and the titanium alloy T15.2 powder in the proportion are put into an aluminum alloy; and after refining and deslagging, aluminum magnesium alloy liquid is poured into a model fitted with pattern blocks for natural solidification cooling through casting ladle pouring and gravity casting, the mold is opened, punching is performed, and the plaster model is removed, so that tire pattern blocks meeting the requirements are obtained. Compared with other commonly-used aluminum, the produced aluminum magnesium alloy pattern ring has the benefits that a novel casting tire mold pattern ring (block) aluminum material with high stability and reliability is used, the energy is saved, and the cost is reduced.

The invention discloses a cuprous oxide fifty-surface crystallite as well as a preparation method and application thereof. According to the preparation method, copper acetate monohydrate is used as a copper source, water, strong base and glucose are respectively used as a solvent, a precipitator and a reducing agent, the reaction temperature is 50-80 DEGC, and the cuprous oxide fifty-surface crystallite is obtained through an oxidation-reduction reaction. The cuprous oxide fifty-surface crystallite prepared according to the invention is formed by closing 24 high-index crystal faces ({211} crystal face or {311} crystal face), 12 {110} crystal faces, 8 {111} crystal faces and 6 {100} crystal faces, and comprises 120 ridges and 72 vertexes. The method has the advantages of gentle reaction condition, simple equipment, convenient operation, low cost, high yield, environment protection, suitability for large-scale industrial production and the like. The crystallite has excellent visible light catalytic activity, and has wide application prospect in aspects of solar batteries, hydrogen production, lithium ion batteries, biosensors and the like.

The invention relates to a preparation method for a furan nitrogen-free environment protection casting resin adhesive. The preparation method is characterized by comprising the specific steps: matching raw materials according to a certain mass part ratio, wherein the raw materials comprise, by mass, 60 parts of furfuryl alcohol, 30-35 parts of polyvinyl alcohol, and 15-20 parts of butyraldehyde; adding the raw materials to a reaction kettle; stirring while adding 15-20 parts by mass of furan resin acid waste water with a concentration of 12% to the reaction kettle, wherein the furan resin acid waste water is adopted as a catalyst; opening a heat source, controlling a temperature to 38-42 DEG C, and carrying out a reaction to generate an alcohol prepolymerization product; further heating to a temperature of 48-52 DEG C, and adding 60-70 parts by mass of furfuryl alcohol to the reaction kettle; closing the heat source, adjusting the PH value to a neutral PH value, adding a coupling agent when the temperature in the reaction kettle is close to 19-21 DEG C, and stirring; and filtering after 1-2 hours to obtain the product. The resin prepared by using the preparation method provided by the present invention has characteristics of good high temperature performance, high strength, low gas evolution, smooth casting surface, and energy source and heat energy saving, wherein solar energy hot water is adopted to heat, such that 100% energy source is saved.

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.