882 results about "Surface preparation" patented technology

The invention provides a thermal interface material based on vinyl imidazole ionic liquid as well as a preparation method and application of the thermal interface material. The thermal interface material is prepared from the following raw materials: the vinyl imidazole ionic liquid, a heat-conducting filler subjected to surface treatment by a silane coupling agent, an initiator and a cross-linking agent. The thermal interface material is based on the vinyl imidazole ionic liquid and the heat-conducting filler, the limitation of a traditional thermal interface material base body is broken through, dispensing can be achieved, no solvent is needed in the preparation process, the adverse effect of solvent residues on the performance of a chip when the thermal interface material is applied to the chip subsequently can be avoided, and the thermal interface material has ideal interface bonding strength; the heat conduction effect is remarkable and stable, the heat stability is good, the material can be well attached to an interface, the problems of stress concentration, cracks and the like are not prone to occurring, and the material can be widely applied to the heat conduction and heat dissipation fields of aerospace, advanced energy, electronic information, military industry and the like.

The invention discloses a partitioned multifunctional metal double-cavity vacuum coating process and system, and belongs to the technical field of material surface treatment. The process comprises the steps of base material pretreatment, double-cavity preparation, vacuum inspection, first cavity bottom layer deposition, vacuum transfer, second cavity functional layer deposition and cooling, the double cavities are provided with corresponding target materials respectively, and parallel operation and vacuum seamless transfer are supported; the system comprises double coating cavities, a vacuum transmission channel, a vacuum acquisition and control module, a coating deposition module, a workpiece bearing module and a process parameter regulation and control module, and each of the double cavities is provided with a multi-target mounting rack and carries a real-time monitoring unit and an intelligent control system. Integrated preparation of the composite film layer and synchronous production of multifunctional workpieces are achieved, operation gaps are eliminated, the compactness and adhesive force of the film layer are improved, parameter deviation and the reject ratio are reduced, and batch production requirements are met.

The invention relates to the technical field of medical interventions, and discloses a difficult-to-layer composite woven balloon and a preparation method thereof, the difficult-to-layer composite woven balloon comprises an inner balloon and a fiber line structure woven on the outer surface of the inner balloon; the fiber thread structure is divided into warp threads and weft threads, the fiber threads extending in the diameter direction of the balloon are the warp threads, and the fiber threads extending in the axial direction of the balloon are the weft threads; the inner balloon is sequentially subjected to surface treatment, primer treatment, fiber weaving, surface treatment, surface sizing and surface curing treatment. The preparation process does not need complex special equipment, the material requirement is reasonable, the repeatability is high, the production difficulty and cost are reduced, convenience is provided for large-scale application of the material, and the material has extremely high practical value and popularization potential in medical scenes such as vascular stenosis dilation and calculus dilation pathway establishment.

The invention belongs to the technical field of electronic packaging and welding materials, and relates to lead-free solder powder for reflow soldering and a preparation method of the lead-free solder powder. The lead-free solder powder is based on a Sn-Ag-Cu alloy system, and melt purification, beta-Sn grain refinement and interface IMC stabilization are achieved by compositely adding trace Ce and Ni elements. The Sn-Cu-Ce alloy comprises the following components in percentage by mass: 2.9%-3.1% of Ag, 0.45%-0.55% of Cu, 0.01%-0.10% of Ce, 0.01%-0.05% of Ni and the balance of Sn and impurities. During preparation, a Ce-Ni intermediate alloy is adopted to introduce microalloy elements, and the spherical solder powder is obtained through vacuum melting, inert gas atomization and surface treatment. The obtained solder powder is low in oxygen content, good in wettability, slow in interface IMC growth after backflow, high in welding spot strength and excellent in thermal cycle reliability, and is suitable for the field of high-reliability electronic packaging.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

The invention discloses a wear-resistant high-gloss nano liquid, a wear-resistant high-gloss ceramic tile and a preparation method of the wear-resistant high-gloss ceramic tile, and belongs to the technical field of ceramic manufacturing. The wear-resistant high-gloss nano liquid at least comprises a component A, a component B and a component C which are independently subpackaged, wherein the component A comprises large-particle silica sol, boric acid, sodium methyl silicate, carboxymethyl cellulose sodium, a boronizing stabilizer and the balance of water; the component B comprises a boronizing stabilizer and the balance of water-based modified silicone oil; and the component C is wax emulsion. Through systematic material and process innovation, the ceramic tile which is high in gloss, strong in antifouling property, durable in wear resistance and high in transportation performance is prepared, and the market requirements of surface treatment materials which are high in performance, low in cost and easy to transport are met.

The invention provides a high-strength fiber composite material based on aramid 1414 fibers and a preparation method of the high-strength fiber composite material, and belongs to the technical field of composite materials. The composite material comprises 60%-80% of aramid 1414 fibers and 20%-40% of a resin matrix, the aramid 1414 fibers are subjected to surface treatment and size stabilization treatment through a specific process, and the compatibility of the fibers and the resin matrix and the overall performance of the composite material are fully improved. According to the invention, the characteristics of high strength and high modulus of the aramid 1414 fiber are utilized, so that excellent mechanical properties are provided; due to the low-density characteristic of the aramid 1414 fibers, the composite material is light while high strength is kept, and the performance requirements of light weight and high strength are met. The composite material disclosed by the invention not only has excellent mechanical properties, but also realizes the balance of cost effectiveness and production efficiency by optimizing a preparation process, and has a wide market application prospect.

The present disclosure relates to compositions, assemblies, systems and methods for surface finishing, e.g., smoothing and polishing electrically conductive parts (e.g., metals or metal parts), e.g., via ion transport by means of said compositions, also referred herein as Magnetic Dry Electrolytes (MDEs), comprising free solid bodies retaining a liquid electrolyte used in combination with magnetic particles and / or magnetic fields. Thereby, the free solid bodies retaining the liquid electrolyte may be made magnetically active. The presence of the magnetic particles and / or magnetic fields presents a wide range of possible application, e.g., regarding the control and synchronization of the electrically conductive free solid bodies motion, packing factor and the electrochemical pulses and properties of the particles and the surface treatment, e.g., surface finishing, on which they are used, including the smoothing and polishing of electrically conductive parts, e.g., metal parts, for example punches, gears or inner channels (e.g., metal parts with inner channels).

The invention relates to the field of photoelectric functional materials and devices, and discloses a surface treatment method and a preparation method of a perovskite thin film and a perovskite solar cell, and the surface treatment method comprises the following steps: coating the surface of the perovskite thin film with a top interface molecular repair solution, and carrying out annealing treatment, wherein the top interface molecular repair solution comprises an organic solvent and a passivating agent. Chemical polishing is achieved through the mixed solvent in a specific proportion, residual excessive lead iodide on the surface of the thin film is accurately removed, and meanwhile surface defects are repaired in situ through triazine molecules which are resistant to high temperature and free of deprotonation risks. According to the collaborative strategy, the surface roughness and the defect state density of the perovskite thin film are remarkably reduced, and the photoelectric conversion efficiency and the long-term operation stability of the perovskite solar cell are effectively improved.

The invention relates to a manufacturing method of a duplex stainless steel and carbon steel asymmetrically rolled composite plate. Stainless steel is any one of duplex stainless steel. The medium carbon steel is any one of plain carbon steel, low-carbon steel and alloy steel. The manufacturing method of the asymmetric composite blank of the duplex stainless steel and the carbon steel comprises the following steps: 1, preparing raw materials for assembling the blank; 2, pretreating the stainless steel middle plate; and 3, surface treatment of the assembly raw material. And 4, cleaning. And 5, assembling. And 6, vacuum chamber electron beam seal welding. And 7, composite blank welding seam detection. And 8, heating the composite blank. And 9, rolling the composite plate. And 10, laminar cooling. And 11, the composite blank has no cracking phenomenon in the heating and rolling processes, the interface shear strength tau after hot rolling is larger than or equal to 280 MPa, the interface bonding rate is 100%, the bonding performance is good, and the proportion of dual-phase steel ferrite is 40-60%.

The application belongs to the field of metallurgy and relates to a preparation method of titanium alloy wire, in particular to a bright surface cold drawing preparation method of high-strength titanium alloy wire.The titanium alloy wire is subjected to vacuum heat treatment and surface lubricating treatment, then subjected to multi-group multi-pass bright surface cold drawing process, and finally subjected to surface treatment to obtain titanium alloy wire with target diameter.By controlling pass deformation of 8-20% and heat deformation of 30-50%, the titanium alloy wire is subjected to full-process bright surface cold drawing from φ3.0mm to φ0.2mm, and the drawing speed reaches 15-35m / min.The titanium alloy wire prepared has good metallographic structure, high uniformity, and a yield of more than 80%.For the fine wire from φ0.5mm to φ0.2mm, the bright surface drawing reduces the frequency of the problem that the wire is prone to breakage due to the depression on the surface of the wire caused by the oxide skin on the surface of the wire.

The invention belongs to the technical field of water-based ink, and provides high-temperature-resistant water-based ink for laminated iron and a preparation method thereof.According to the high-temperature-resistant water-based ink for laminated iron and the preparation method of the high-temperature-resistant water-based ink for laminated iron, the design of a double-resin system formed by compounding waterborne polyurethane resin and flexible segment copolymer modified ternary vinyl chloride-vinyl acetate resin is adopted, and the synergistic effect of surface modified nanometer aluminum oxide reinforcing filler and an elastomer modifier is combined; the interface compatibility is improved through a siloxane coupling agent surface treatment technology, a composite coating structure with balanced flexibility and heat resistance is formed, the high temperature resistance can reach 200 DEG C or above, continuous use is free of failure, the flexibility is free of cracking through a T-bend test, the adhesion of a coating film reaches the 0-level standard, the drying time is shortened to be within 30 minutes, and the service life of the coating film is prolonged. The comprehensive performance index that the storage stable period is prolonged to 12 months or above is achieved, the technical problems that an existing laminated iron coating is insufficient in flexibility and poor in thermal stability in a high-temperature environment are solved, and the high-temperature-resistant laminated iron coating has wide food packaging and industrial protection application value.

The invention discloses a preparation method of a porous copper foil based on a hydrogel template and the porous copper fores.The method comprises the steps that firstly, a hydrogel solution is applied to the surface of a cathode roller in a spraying mode, and a hydrogel shielding point array is formed by means of the self-polymerization characteristic of the hydrogel solution; secondly, performing electrolysis operation by taking a cathode roller area outside the shielding point as a deposition site to prepare a composite copper foil mingled with the hydrogel shielding point; and then, stripping the composite copper foil from the cathode roller, placing the composite copper foil in an alkaline solution for ultrasonic treatment for 0.5-5 minutes, so that the hydrogel shielding point is swelled and then falls off through ultrasonic oscillation, and a pure porous copper foil is obtained. And finally, performing surface treatment on the porous copper foil by adopting a passivation solution to improve the stability of the porous copper foil. According to the method, accurate regulation and control of the porous structure are achieved through the hydrogel template, the preparation process is green and efficient, and the obtained porous copper foil is uniform in pore distribution, large in specific surface area and good in mechanical property.

The invention discloses an infrared barrier PVB (polyvinyl butyral) intermediate film and a preparation method, and relates to the technical field of environmental functional glass materials, the intermediate film comprises 60-75 parts of polyvinyl butyral resin, 25-35 parts of a plasticizer, 0.5-3 parts of nano tin antimony oxide, 0.1-0.5 part of an ultraviolet absorbent, 0.05-0.2 part of an antioxidant and 0.1-0.5 part of a dispersant, the preparation method comprises the steps of nano infrared blocking agent pre-dispersion, mixing, twin-screw extrusion molding, tape casting cooling, surface treatment and the like, the surface-modified nano tin antimony oxide is introduced as the infrared blocking agent, infrared radiation at the wave band of 780-1300 nm is effectively blocked, the infrared blocking rate reaches 85% or above, the visible light transmittance is larger than 80%, the technology is mature and stable, the cost is low, and the preparation method is suitable for industrial production. The prepared intermediate film can be applied to building and automobile laminated glass, and the heat insulation and energy saving effects are achieved.

The invention discloses a forging and rolling combined method for preparing a large-specification super-long titanium alloy thick plate, which comprises the following steps of: S1, reversely deducing the size of a plate blank and the total amount of required raw materials according to the geometric size and working allowance of a target forged plate, designing the weight of a single cast ingot, mixing the raw materials and pressing into an electrode block, a titanium alloy cast ingot is smelted and prepared by adopting a three-time vacuum consumable electric arc smelting process; s2, after a high-temperature anti-oxidation coating is sprayed to the titanium alloy cast ingot, multi-heating-number forging is carried out, the multi-heating-number forging comprises high-temperature cogging forging, single-phase region forging and plate blank forming forging, and a rectangular plate blank is manufactured; s3, the plate blank is heated and subjected to two-phase region one-fire rolling, and a semi-finished thick plate is prepared; s4, after cracks and surface defects of the semi-finished thick plate are removed, the semi-finished thick plate is heated and subjected to two-phase region rolling, and a finished thick plate is manufactured; and S5, the super-long thick plate is sequentially subjected to annealing and surface treatment, and the finished plate is obtained. The method has the advantages that the traditional size limitation is broken through, the forming efficiency is improved, and the structure uniformity and the material performance of the large-specification forged plate are improved.

The invention discloses a preparation method of a corrosion-resistant and impact-resistant high manganese steel wear-resistant lining plate, and relates to the technical field of wear-resistant materials, the preparation method comprises the following steps: S1, weighing raw materials according to the mass percentage; s2, raw material smelting; s3, rare earth purification is conducted, specifically, rare earth elements are added into the molten-state raw materials, and the molten-state raw materials are subjected to deoxidation and desulfurization treatment; s4, casting molding is conducted, the temperature from the bottom end of a casting to a riser is controlled to be decreased stage by stage, and directional solidification is achieved; s5, heat treatment is conducted, specifically, the casting is subjected to solution treatment and then subjected to water quenching to the room temperature; and S6, surface treatment is conducted, specifically, shot blasting treatment is adopted, surface oxide skin is removed, and a surface compressive stress layer is formed. The strength, hardness and high toughness of the high-manganese steel are guaranteed by controlling the content of carbon and manganese, meanwhile, single-phase austenite is obtained through solution treatment, the hardness is improved through carbon atom segregation through low-temperature aging, and the strength, hardness, toughness and corrosion resistance of the high-manganese steel lining plate are improved.

The invention discloses a method for solving linting and dusting during paperboard printing, and belongs to the technical field of papermaking. Comprising the following detailed steps: a slurry preparation process, surface sizing treatment and a drying and curing process, in the slurry preparation process, various high-quality fiber raw materials are carefully selected and mixed, the proportion of various fibers is accurately controlled according to the expected performance and quality requirements of the paperboard, and meanwhile, a proper amount of auxiliaries are added; and the binding force between the fibers and the strength of the paper are enhanced. The raw material ratio in the paperboard production process is precisely regulated and controlled, the specially-made composite surface sizing agent is adopted for surface treatment, and scientific and reasonable drying and curing processes are matched, so that the problems of linting and powdering of the paperboard in the printing process are effectively solved, and the printing quality and the production efficiency of the paperboard are improved.

The invention relates to a high-solid-content epoxy glass flake heavy anti-corrosion coating for an offshore wind power foundation, which consists of a component A and a component B, the component A is prepared from raw materials in percentage by weight as follows: 10%-20% of bisphenol A epoxy resin, 20%-40% of modified hydrogenated epoxy resin, 5%-10% of liquid petroleum resin, 1%-2% of a rheological aid, 0.1%-1% of a dispersant, 0.1%-1% of a defoaming agent, 1%-3% of a silane coupling agent, 5%-10% of modified glass flakes, 20%-40% of functional filler and 0-10% of a composite environment-friendly solvent; and the component B is a mixed amine epoxy curing agent. The epoxy glass flake coating disclosed by the invention can be thickly coated at one time, has excellent adhesive force, hardness, wear resistance and impact resistance, is high in drying speed, excellent in chemical corrosion resistance, seawater soaking resistance and cathodic disbonding resistance, and meets the performance requirements of NORSOK M-501: 2022 (edition VII) Surface Treatment and Protective Coating.

The invention provides an organic silicon pouring sealant as well as a preparation method and application thereof, the organic silicon pouring sealant comprises a component A and a component B. The component A comprises the following components: 1-5 parts of vinyl silicone oil; 1-5 parts of terminal hydrogen-containing silicone oil; 0.1 to 1 part of cross-linked hydrogen silicone oil; 92-95 parts of spherical aluminum oxide treated by a surface treating agent; 0.5 to 1 part of hollow glass beads; the component B comprises the following component: 4-8 parts of vinyl silicone oil; 92-95 parts of spherical aluminum oxide treated by a surface treating agent; 0.5 to 1 part of hollow glass beads; and the surface treatment agent comprises hexamethyl disilazane and tridecafluorooctyltrimethoxysilane. The heat conductivity coefficient of the organic silicon pouring sealant can reach 4W. M <-1 >. K <-1 > or above, meanwhile, the breakdown voltage of the organic silicon pouring sealant can reach 15kV / mm or above, and the organic silicon pouring sealant can meet the use requirements of part of high-power electronic modules on the heat dissipation and insulation performance of the pouring sealant.

The invention discloses a preparation method of medium and low carbon chromium manganese martensite cast steel. The preparation method comprises the following steps: step 1, preparing raw materials; 2, high-temperature smelting; step 3, deoxidizing and desulfurizing; step 4, casting molding; step 5, annealing treatment; step 6, quenching treatment; step 7, tempering treatment; step 8, surface treatment; according to the invention, the medium-low carbon martensitic cast steel is designed, and the hardness and toughness of the martensitic cast steel are balanced by controlling the content of carbon in the cast steel, so that the problem of lower toughness of the martensitic cast steel under high carbon is avoided; meanwhile, the phenomenon that carbon elements are combined with chromium elements to be dispersed and separated out from grain boundaries or martensite laths in a carbide mode is reduced in cooperation with a heat treatment process, the corrosion resistance of the martensite cast steel is improved, meanwhile, the heat treatment process more suitable for medium and low carbon chromium manganese martensite cast steel is matched, various properties are further balanced, internal stress is eliminated, and the corrosion resistance of the martensite cast steel is improved. And the martensite structure is more uniform and stable.

The invention provides a method for inhibiting the formation of Kirkendall holes in an In-based brazing filler metal welding interface by adopting a vertical twin structure, which comprises the following steps of: respectively adhering a layer of vertical twin structure to the surfaces of an upper metal substrate to be welded and a lower metal substrate to be welded which are subjected to surface treatment in an electro-deposition manner, wherein the size of the vertical twin structure is 5 * 5 mm, the thickness of the vertical twin structure is 20-40 mu m, and the thickness of the vertical twin structure is 10 * 10 mm; the method comprises the following steps: carrying out a thermocompression bonding experiment on a pure copper coating with a vertical orientation nano twin crystal structure at set bonding temperature, pressure and time; according to the technical scheme, by means of the structural characteristic that the diffusion coefficient of the vertically-arranged twin boundaries in the nano twin structure is low, the diffusion rate of interface elements is reduced, flux balance is maintained, and the low impurity characteristic of the vertically-oriented nano twin film is utilized, so that formation of Kirkendall voids in the welding interface is limited. The method provided by the invention is simple and convenient to operate, and has great significance for improving the connection reliability of the In-based low-temperature bonding system.

The invention discloses a surface treatment method for improving the strong adhesive force of a paint film of an aluminum alloy profile spray coating, and belongs to the technical field of novel aviation aluminum alloy and new energy automobile aluminum alloy materials. The method comprises the steps of profile preparation, aging treatment, degreasing treatment, acid activation treatment, nano particle agent surface treatment and the like, and the adhesive force performance of the surface of the aluminum alloy profile is remarkably improved by strictly controlling technological parameters of all the steps. The method not only optimizes the microstructure of the material, but also further enhances the binding force between the paint film and the base material by using the nano-composite liquid, thereby effectively improving the durability and stripping resistance of the coating. Besides, chemical reagents and process conditions adopted in all the steps are accurately designed, so that high efficiency and environmental friendliness of the treatment process are ensured, and a reliable material solution is provided for the high-end manufacturing fields of aviation, automobiles and the like.

The invention relates to the technical field of advanced thermal interface materials, in particular to a high-thermal-conductivity boron nitride insulating heat-conducting gasket and a preparation method and application thereof. The heat-conducting gasket is prepared from the following raw materials in parts by weight: 1000 parts of organic silica gel, 50 to 500 parts of modified boron nitride, 50 to 200 parts of diluent and 150 to 1500 parts of auxiliary heat-conducting filler, according to the heat-conducting gasket, the sheet-shaped boron nitride is oriented in a plane parallel to the horizontal plane through a rolling-hot pressing synergistic orientation technology. Vacuum plasma treatment, in-situ silanization modification and ultrasonic dispersion are integrated, and continuous and automatic production of BN surface treatment is achieved. Meanwhile, by optimizing a rolling-hot pressing synergistic process, directional arrangement and tight stacking of the BN sheet layers are promoted, an efficient three-dimensional heat conduction network is formed, and the heat conduction performance of the composite gasket is remarkably improved.

This invention relates to a wear-resistant shovel blade for engineering machinery and its preparation method, belonging to the field of engineering machinery parts manufacturing technology. The specific preparation method involves: after rolling, quenching, and high-temperature tempering, the shovel blade material undergoes carburizing treatment using ion plating. Then, a W transition layer and a WTiTaB boride gradient coating with varying composition are prepared using magnetron sputtering. This invention combines the WTiTaB boride gradient coating, physical vapor deposition, and carburizing technology, which can mitigate the difference in physical properties between the boride coating and the substrate material of the shovel blade, improve the surface hardness and support of the substrate material, and result in high surface hardness, core toughness, and excellent tribological properties. Compared with traditional carburizing processes, the surface hardness is increased by nearly three times, the surface treatment time is shortened by more than 90%, and the wear rate is reduced by 78-83%.

To provide improved surgical instruments. [Solution] Surface preparation of sliding surfaces can improve the wear performance of surgical instruments such as surgical staplers, which include a reusable mechanism that is used multiple times with a single-use reloadable cartridge. A combination of surface hardening, surface finishing, and surface coating can be applied to the metal components of surgical instruments to reduce the possibility of abrasive wear in metal-to-metal sliding engagements. Surface hardening technology can enable further manufacturing operations such as welding without compromising the strength of the underlying metal substrate. With stainless steel metal substrates, surface hardening or surface hardening technology may reduce corrosion resistance, so a surface coating can be added to suppress surface oxidation and to provide a barrier against metal-to-metal contact. Further lubricating coating layers, such as a brazing coating layer, can enhance abrasion resistance.

The invention relates to the technical field of automobile glass surface treatment, in particular to heat management coated glass and a preparation method thereof, and the heat management coated glass is prepared by compounding two pieces of composite glass through an adhesive film; the composite glass sequentially comprises a glass substrate, an ultraviolet absorption functional layer and an infrared reflection functional layer, the preparation raw materials of the ultraviolet absorption functional layer at least comprise a SiO2 sol matrix and an inorganic ultraviolet absorbent; the preparation raw materials of the infrared reflection functional layer at least comprise tetraethoxysilane, acetylacetone, hydrochloric acid and antimony-doped tin oxide nanoparticles. The surface of the glass is coated with the optimized ultraviolet absorption functional layer and the infrared reflection functional layer, so that the barrier rate to ultraviolet (UV) of 99% or above and the reflectivity to infrared (IR) of 80-90% are achieved, and meanwhile, the glass has the characteristics of low cost and high weather resistance.

The invention particularly discloses a sand blasting and coating integrated production device used after PE sheet extrusion. The sand blasting and coating integrated production device comprises an unwinding roller, a machine body and a drying box which are continuously arranged. A plurality of guide rollers are arranged on the machine body and used for guiding the PE sheets on the unwinding roller into the drying box; a surface treatment mechanism, a glue spraying mechanism and a glue scraping mechanism are sequentially arranged on the machine body in the movement direction of the PE sheet; the surface treatment mechanism comprises a main shell, and a sand blasting treatment assembly is arranged on one side of the main shell and used for conducting sand blasting cleaning on the surface of the PE sheet. A processing roller assembly is arranged at the bottom of the main shell and used for conducting galling processing on the PE sheet. And a suction assembly is arranged on the other side of the main shell. Through process integration and structure optimization, the production efficiency is improved, the product quality is guaranteed, meanwhile, environment-friendly and energy-saving production is achieved, and the device has remarkable technical advantages and practical value and can be widely applied to large-scale machining and production of PE sheets.

The utility model discloses surface treatment equipment for mold production, which belongs to the technical field of mold production and comprises a sand blasting machine body, a door frame is mounted on one side of the sand blasting machine body, and an observation window and a skylight are mounted on the side face and the top of the sand blasting machine body respectively. Supporting legs are fixedly connected to the lower portion of the sand blasting machine body, a discharging hopper is installed at the bottom of the sand blasting machine body, and a motor is installed in the discharging hopper. The four clamping assemblies are distributed above the machining disc in a surrounding mode, firstly, a to-be-machined mold is placed above the machining disc, at the moment, the adjusting buttons are sequentially screwed to drive the screw rods to rotate, the arc-shaped pads are attached to the surface of the mold, clamping and limiting of the mold are formed, then the position of a spray head of a sand blasting machine is aligned with the mold, and sand blasting is conducted; and dust and residual abrasive materials can be filtered through a filter frame and sieve holes, traditional manual sand blasting on the mold is replaced, the overall working efficiency is high, and operation is convenient.

The present application relates to a kind of high-efficiency lossless preparation multi-element wafer assembly method, the method utilizes the high bonding strength of water boiling glue epoxy adhesive, excellent water boiling glue, glue layer soft characteristics, so that piezoelectric ceramic small particle does not fall in wafer assembly preparation process, substrate removal is simple and easy, and does not damage the electrode surface of piezoelectric ceramic small column, including the following steps: surface treatment;Gluing;Cutting;Washing, normal temperature air dry;Low-temperature prebaking, fill high molecular decoupling material, remove the decoupling material on the electrode surface of piezoelectric ceramic small particle clean;Solidification;Polish and remove substrate;Remove excess particles to form approximately circular wafer assembly;Positive and negative electrode line lead out.The present application prepares multi-element wafer assembly method, utilizes the high bonding strength of water boiling glue epoxy adhesive, good impact resistance characteristics, overcomes the problem that its bonding strength is reduced due to factors such as water vapor and temperature in preparation process, and does not damage the electrode surface of piezoelectric ceramic small column.

The present invention provides a water-based surface preparation agent composition that combines paint film stripping and rust removal properties. [Solution] This is a surface preparation agent composition for removing rust along with the existing paint film when repainting an existing paint film applied to existing steel materials. It contains at least benzyl alcohol, a hydroxy acid, and water. The hydroxy acid is citric acid, malic acid, or an acidic salt thereof. Furthermore, it contains hydroxyethyl cellulose as an emulsifier for benzyl alcohol. The pH is preferably 4.0 to 6.0. This water-based surface preparation agent composition is applied to the existing steel material to remove rust along with the existing paint film.