145results about How to "Keep surfaces clean" patented technology

The invention discloses a multilayer composite plate for building templates and brick pallets, which is prepared from magnesium cement gel added with a reinforcing material and a filler, and comprises surface layers (1) and sandwich layers (2); the surface layers (1) or/and the sandwich layers (2) comprise the filler or/ and the reinforcing material with even content or gradient change; the number of the sandwich layers (2) is totally between 1 and 5; and the reinforcing material is arranged between adjacent sandwich layers (2). The invention also comprises a preparation process for the multilayer composite plate, which comprises that: production equipment with the capacity of stirring and preparing materials at multiple positions and rolling at multiple positions orderly rolls the surface layers (1) or/and the sandwich layers (2) on a subplate (3); and the reinforcing material is used as a reinforced structure between adjacent surface layers (1) or/and sandwich layers (2). The products corresponding to the invention have the characteristics of strong applicability, good technical effect and suitability for mechanical continuous production, and have predictable great economic and social values.

The invention discloses a method for preparing an efficient hydrolysis metal sulfide electrode material through a one-step method. The method includes the following steps that nickel foam obtained after ultrasonic treatment serves as a carrier and is soaked into a high pressure reactor containing metal sulfide and a precursor, a hydrothermal reaction is made at 140 DEG C-200 DEG C so that the metal sulfide can be loaded on the nickel foam, and reacting is carried out for 6 h. the method has the following beneficial effects that (1) the three-dimensional porous metal sulfide is directly synthesized without the help of a template, the hydrolysis hydrogen evolution and oxygen evolution catalytic activity site density is high, the electronic transferring path is short, and the catalytic performance is good; (2) the metal sulfide of a nano-structure is directly connected with the electrical conductive nickel foam carrier, the contact and the electrical conductivity are good, the specific conductance and the electron transferring efficiency are better improved, and overpotential needed by energy barriers is reduced to a large extent; and (3) electrolyte can enter the interior of the porous electrode material easily, the electric current density is high, the crystal structure is stable, and the circulated stability and durability of the material are greatly improved.

The invention discloses an offsetpress, and relates to the field of pressing equipment. According to the technical scheme, the offset press comprises a machine frame and a rubber roller. An ink scraping mechanism fixed to the machine frame abuts against the rubber roller. The ink scraping mechanism comprises a scraping tool assembly arranged in the generatrix direction of the rubber roller and abutting against the rubber roller, and an ink collecting groove connected to the bottom end of the scraping tool assembly. The scraping tool assembly comprises a fixedly connected scraping tool and an arc covering plate arranged close to the upper portion of one end of the rubber roller. The rotary tangential direction of the contact line between the scraping tool and the rubber roller and the bladeface of the scraping tool form an acute angle and are arranged inclined downwards. An ink inlet is formed between the covering plate and the scraping tool. The scraping tool assembly is provided witha flat channel used for communicating the ink inlet and the ink collecting groove. An air pump is connected with the position, corresponding to the exit of the flat channel, of the scraping tool assembly above the opening of the ink collecting groove. The offsetpress solves the problem of an existing offset press of subsequent printing stack caused by residual ink on the rubber cylinder surface,and printing clarity improvement is facilitated.

The invention discloses a preparation method of an anti-migration thermoplastic polyurethane elastomer. The preparation method comprises the following steps: (1) adding heated and molten polyester polyol into a reaction kettle, and adding an antioxidant and a catalyst, and dewatering under heating and reduced pressure conditions to form a component A; (2) heating and melting diisocyanate to form a component B; (3) heating and melting a dihydric alcohol chain extending agent, and dewatering under the reduced pressure condition to form a component C; (4) reacting the components A, B and C in a double-screw extruder, and fully and uniformly mixing a reaction product with a macromolecular hindered amine light stabilizer to obtain the anti-migration thermoplastic polyurethane elastomer; (5) curing the anti-migration thermoplastic polyurethane elastomer obtained in the step (4). According to the anti-migration thermoplastic polyurethane elastomer, the smooth surface can be better kept and the physical property retention period can be better prolonged in processed products such as late-period wires and cables and films.

The invention discloses a manufacturing method for a two-layer silicon epitaxial wafer used for a bipolar transistor. Compared with a manufacturing method for a conventional two-layer silicon epitaxial wafer, the manufacturing method for the two-layer silicon epitaxial wafer used for the bipolar transistor is characterized by comprising the following steps of removing micro damages of the surface of a silicon wafer by using a hydrogen chloride (HCl) polishing process before a first layer silicon epitaxial wafer is grown; taking out the silicon wafer after the first layer silicon epitaxial wafer is grown to perform etching treatment on a system; and cleaning the silicon wafer before a second layer is grown to ensure the surface to be clean, removing the micro damages of the surface by using the HCl polishing process, and removing impurities by using hydrogen (H2) after polishing. According to the manufacturing method, a reaction chamber etching step is inserted, and therefore, the uniformity and the repeatability of the electrical resistivity of an epitaxial layer are ensured, and the performance and the finished product rate of a device are ensured.

The invention discloses a method for preparing glazed drinking utensils. The method comprises the steps of product drawing designing, clay mould manufacturing, silicon rubber mould duplicating, wax mould casting and removing, wax mould modifying, plaster mould manufacturing, dewaxing for manufacturing a fire-proof plaster internal-hollow female mould, raw material configuration, high-temperature burning, mould removal, cutting and grinding, product finishing and polishing; between the step of wax mould modifying and the step of mould casting and firing, the method also comprises a step of manufacturing a product inner-core mould; and between the step of dewaxing and the step of raw material configuration, the method also comprises a step of mould splitting and assembling. The preparation method disclosed by the invention has the advantages that: the method is suitable for the demoulding and firing of large internal-hollow products, metal components are not easy to be separated out, and fingerprints cannot be left on the surface of a prepared product easily; meanwhile, an operation of precision annealing can be performed, the heat and cold tolerances of materials are high, and the prepared product is not easy to crack.

The invention discloses a multi-module combined type solar module. The multi-module combined type solar module comprises a base, wherein a first mounting groove is formed in the upper end of the base;a second mounting groove is formed in the middle of the bottom wall of the first mounting groove; the bottom wall of the second mounting groove is rotatably connected with a first rotating shaft; a mounting seat is arranged in the first mounting groove; the upper end of the first rotating shaft is fixedly connected with the mounting seat; locking mechanisms are separately arranged on side walls of two sides of the base; two mounting columns are arranged at the upper end of the mounting seat, and are separately positioned on two sides of the mounting seat; and a photovoltaic battery mounting plate is arranged between the two mounting columns; photovoltaic battery panels are arranged on side walls of the photovoltaic battery mounting plate; and a rotating rod penetrates in the photovoltaicbattery mounting plate. The angle of the solar module can be adjusted flexibly according to the height of the sun in different periods in a year. The multi-module combined type solar module has a cleaning function, cleanness of the surface of the battery panel is maintained, and the illumination receiving effect is good.

The invention provides a preparation method for a multifunctional TiO2 nano-paint. The preparation method comprises the following steps: preparation of a TiO2 solution with butyl titanate as a titanium source, isopropanol as a solvent and diethanolamine as a hydrolysis inhibitor; and dispersion and surface modification of the TiO2 nano-solution: carrying out TiO2 surface modification on the obtained TiO2 solution with sodium silicate as a dispersing agent and silane as a coupling agent so as to obtain the multifunctional TiO2 nano-paint. The multifunctional TiO2 nano-paint prepared in the invention can be directly sprayed on the surface of a substrate at normal temperature and has good bonding action on the substrate; surface cleanness of a photovoltaic assembly is maintained mainly in virtue of super hydrophilicity and self-cleaning performance of a formed coating; and the photoelectric conversion rate of the photovoltaic assembly is improved.

The invention provides a high glaze ornamental and double-component acrylic polyurethane anti-bacterium coating which contains the following components: 60 percent-80 percent of hydroxylated acrylic resin, 1 percent-10 percent of pigment, 3 percent to 5 percent of butyl acetate, 1 percent to 3 percent of dimethylbenzene, 0.5 percent to 1 percent of accessory ingredient and 1 percent to 5 percent of inorganic antiseptics. The anti-bacterium coating also contains curing agent, and the proportion of the anti-bacterium to the curing agent is 3 to 6: 1. The pigment can also adopt metallic flakes or pearls powder; the accessory ingredient is a flatting agent or a dispersant; the curing agent is urethane resin of fatty group. The novel anti-bacterium coating combines the functions of environmental protection, high decorativeness and protection and antibacterial property, and can be taken as the protective coating of electronic products, household appliances, sanitary wares and public facilities.

The invention discloses an air cooler used for cooling a high voltage direct current transmission converter valve and a manufacturing process thereof. The air cooler comprises a channel box; clapboards are arranged in the channel box to divide the inside of the channel box to a plurality of relatively independent interlayers; a stainless steel tube bank comprising a plurality of stainless steel finned tubes is arranged in the interlayers; the stainless steel finned tube comprises an O6Cr18Ni9 or O6Cr17Ni12Mo2 material parent tube and aluminum rolled fins covering the outside of the parent tube; precipitation amount of ion is decreased to the minimum to ensure the purity of cooling water; specific pre-process treatment of rolled fins effectively decreases thermal resistance between a stainless steel tube and an aluminum tube to improve radiating efficiency; working procedures are arranged reasonably and impurity or roll scale is removed in time, so that the surface of the liquid contacting material of the air cooler is clean to ensure the high purity of fluid.

The invention discloses a high-precision and pollution-free semiconductor wafer cleavage method. The method comprises the following steps: spinning photoresist on the surface of a semiconductor wafer to prepare a covering film; photoetching a strip-shaped run-through corrosion area on the covering film by using a photoetching machine; performing chemical corrosion in the corrosion area by using corrosive liquid to form a V-shaped cleavage slot; taking out the semiconductor wafer from the corrosive liquid and removing the covering film from the surface of the semiconductor wafer; and segmenting the semiconductor wafer along the V-shaped cleavage slot and finishing semiconductor wafer cleavage. The V-shaped cleavage slot is manufactured by a photoetching and corrosion mode, so the position precision of the V-shaped cleavage slot can be guaranteed to be within 1 micron, and the precision of the cleaved semiconductor wafer is guaranteed to be within 1 micron. The V-shaped cleavage slot is manufactured by the chemical corrosion method, so no substrate material scrap is generated, the surface of the cleaved semiconductor wafer is guaranteed to be clean, and the quality and the finished product rate of chips are improved.

The invention discloses a paint spraying process of an intermediate toothed plate. The paint spraying process comprises the following steps of (1) surface treatment: removing oil, rust and dust; (2) primer spraying: spraying primer onto the intermediate toothed plate within 4-12 hours after the surface treatment; (3) baking: baking the intermediate toothed plate after the primer spraying, with the baking temperature of 90-100 DEG C and the baking time of 30-40 minutes; (4) finishing of paint surface: finishing the paint surface of the intermediate toothed plate after the baking; (5) topcoat spraying: spraying topcoat onto the intermediate toothed plate within 12 hours after the finishing of paint surface; (6) baking: baking the intermediate toothed plate after the topcoat spraying, with the baking temperature of 90-100 DEG C and the baking time of 30-40 minutes, and airing for 12-24 hours after the baking; (7) inspection: inspecting the appearance, coating thickness and adhesion. The paint spraying process has the advantage that the paint spraying quality of the intermediate toothed plate can be guaranteed by the process flow.

This invention provides a quick and convenient peanut shell-breaking device. The device includes a frame, above which a conveyer belt is arranged; a feeding hopper and telescopic blocks are separatelyarranged above the two ends of the conveyer belt; a slanted guide plate is arranged on the frame at the discharging end of the conveyer belt; a collection box is arranged below the guide plate; the upper part of the frame is provided with a control panel; each telescopic block is connected to a telescopic motor; supporting blocks which are corresponding in position are arranged on the inside of the conveyer belt which is arranged right below the telescopic block; baffles which are arranged on the frame are arranged on the two sides of the conveyer belt; stop blocks which are used for limitingpeanuts are arranged on the baffles; and the inside of the stop blocks is provided with a second telescopic motor which is used for squeezing peanuts for a second time. The device of this invention can carry out shell-breaking on peanuts for a second time, enables peanut kernels to have high integrality, and is simple to operate and easy to achieve large-range popularization and usage.

The invention discloses a horizontal machining center tool magazine. The horizontal machining center tool magazine comprises a tool magazine assembly with a plurality of tool clamping jaws; the tool clamping jaws clamp tools; the horizontal machining center tool magazine further comprises a tool pushing mechanism used for pushing external tools to the position of the tool magazine assembly or pushing the tools in the tool magazine assembly to the outside and a cleaning mechanism used for cleaning the tools in the tool magazine assembly; When the tools clamped by the clamping jaws in the tool magazine are cleaned, a driving mechanism drives an overturning shaft to rotate, so that the cleaning mechanism is overturned to the positions of the tools to clean the tools; after cleaning is completed, the cleaning mechanism is driven by the driving mechanism to reset; the tool changing action of the tool magazine is not affected, and the cleaning action is executed before each time of tool changing; when the tools in the tool magazine are taken and conveyed, the tools are pushed into the machining center through the tool pushing mechanism; automatic tool changing is achieved; and the changed tools are taken out of the machining center through the pushing mechanism, and therefore risks caused by manual tool changing at the position of the tool magazine are avoided.

The invention discloses a CuPd alloy nanocrystal preparation and component regulation and control method, and a synthesis method mainly comprises the following steps: preparing soluble copper salt, adding potassium chloride powder, and uniformly stirring in a high-temperature environment to obtain a mixture 1; dissolving palladium chloride powder in a hydrochloric acid solution at a high temperature, and adding the solution into the mixture 1; and adding an ascorbic acid solution, and carrying out high-temperature stirring reaction for 5-6 hours. The component regulation and control method comprises the step of regulating the dosage of hydrochloric acid and palladium chloride powder in a reaction solution to control the atomic percent of Cu and Pd in the alloy. The method takes water as a solvent, is carried out without gas protection, is simple in operation scheme, and does not add an organic surfactant in synthesis. The component regulation and control method provides a wider space for the application of the CuPd alloy nanocrystals.

The invention discloses a novel fingerprint lock, which comprises a fingerprint lock body,a front cover plate is arranged on the front side of the fingerprint body, a first protective shell is arranged on one side of the front cover plate, a second protective shell is arranged on the other side of the front cover plate, corresponding to the first protection shell, a push-pull mechanism is arrangedat the middle part of the front cover plate, according to the invention, the structure is scientific and reasonable, the use is convenient, the first protective shell and the second protection shellcan effectively protect the fingerprint lock body and reduce the damage of the front cover plate,an emergency lock head is hidden, so that a lawbreaker is prevented from unlocking by using the emergency lock head; the surface of a fingerprint input device is cleaned by the cleaning block at the bottom of the protective plate, residual fingerprint marks on the surface of the fingerprint input device are avoided, the situation that the fingerprint is stolen and utilized by the lawbreaker is avoided, the surface cleaning of the fingerprint input device is ensured, and the fingerprint is input conveniently and more accurately; the surfaces of a second sleeve and push rod can be cleaned by a doctor blade so as to avoid bacterial carryover and infection caused by different users when the lock isused.

The invention relates to an economical environment-friendly degradable plastic sheet and a preparation method thereof. The economical environment-friendly degradable plastic master batch is composed of polyolefin, calcium carbonate, a photosensitizer, an oxidative degradation agent, a biodegradation control agent, a processing assistant, a coupling agent, a heat stabilizer, a photostabilizer and an antioxidant. The sheet is prepared from the following raw materials in parts by weight: 30 parts of economical environment-friendly degradable plastic master batch, 60-100 parts of activated calcium carbonate, 10-20 parts of short fiber and 0.5-2.5 parts of coupling agent. The invention provides a production method of the economical environment-friendly degradable master batch. The master batch can be mixed with other plastics to process degradable plastic products. Compared with the prior art, the technique for processing the economical environment-friendly degradable sheet adopts abundant calcium carbonate and chopped fibers as the processing raw materials, and thus, ensures the operating requirements of the product on the premise of lowering the production cost. The sheet has high chemical stability (high temperature resistance, water resistance, oil resistance and the like), can be used for packaging in the fields of food, toys, hardware, electronic products and the like, has the advantages of high biological decomposition speed, low cost and the like, and can easily implement industrialization.

The invention discloses environment-friendly paint for purifying air. The environment-friendly paint is prepared from, by weight, 60-70 parts of rosin resin, 15-18 parts of aloe powder, 12-15 parts of shell powder, 10-12 parts of talcum powder, 0.5-1 part of sumatriptan, 0.12-0.15 part of color black, 2-4 parts of brightener, 5-8 parts of titanium dioxide, 4-6 parts of non-polymer plasticizer, 8-10 parts of stearic acid, 2-4 parts of hydroxyethyl cellulose, 5-7 parts of glycerinum, 3-5 parts of a flatting agent and 0.5-1 part of aluminum powder. Coating particles with the particle size smaller than 1 micrometer can be formed on the surface of coating, smoothness is improved greatly, and surface cleanness can be kept for a long time.

The invention discloses an aluminum profile for controlling a coarse-grained ring and a manufacturing method thereof. The aluminum profile is prepared from the following elements in percentage by mass: 0.50-0.55% of Si, 0.15% of Fe, 0.01% of Cu, 0.15-0.25% of Mn, 0.54-0.62% of Mg, 0.14-0.2% of Cr, 0.01% of Zn, 0.02% of Ti, less than or equal to 0.15 part of the total content of other impurity elements, and the balance of Al, wherein the mass percentage of Mn+ Cr is 0.3-0.42%. According to the technical scheme, during casting of ingredients, it is better to control the content of Mn+ Cr in 0.32% to 0.34%, and the formation of the coarse-grained ring can be effectively prevented by controlling an ingot structure as a fine isometric crystal; in the extrusion type, a rapid coarse-grained extrusion process is adopted, rapid water-cooling is conducted, the extrusion ratio is controlled between 10 and 20, and the formation of the coarse-grained ring can be reduced; and in the quenching process, the bar diameter is controlled to 520 DEG C/30-120 min, the coarse-grained ring cannot be deepened, and grains cannot grow coarse.