16results about How to "Avoid surface defects" patented technology

The present application relates to the technical field of aluminum strip electroplating, and particularly relates to a continuous extrusion and electroplating integrated preparation method for aluminum strip. The present application is characterized by the following aspects: a full-process continuous process design is adopted, including continuous extrusion, continuous electroplating pretreatment, continuous electroplating of composite coating, and continuous post-plating treatment; a differentiated process connection scheme is set for 1 series and 6 series aluminum alloy substrates; a nickel functional layer deposition thickness quantitative regulation and control model is adopted, in which a turbulence correction coefficient is introduced; and a copper-nickel composite coating structure, segmented current density control, plating solution temperature matching concentration matching regulation and control technology are adopted. The present application realizes integrated continuous production of aluminum strip forming and surface modification, greatly improves the adhesion, thickness uniformity and corrosion resistance of the coating, and balances the production efficiency and product performance, and can be widely applied to the preparation of conductive aluminum strips in high-end fields such as new energy vehicles.

The invention discloses an environment-friendly high-performance titanium alloy polishing composition as well as a preparation method and application thereof, and relates to the technical field of metal material surface treatment. According to the environment-friendly high-performance titanium alloy polishing composition, the pH value of a basic system is adjusted to 9.5-10.0 through a pH adjusting agent; the base system comprises the following components in percentage by mass: 10-30% of silica sol, 3-4% of an anti-gel stabilizer (urea or methylurea), 2-3% of a heat transfer improvement and surface defect inhibitor (ethylene glycol or propylene glycol), 0.1-0.2% of a wetting leveling agent, 1-2% of an alcohol amine complexing agent and 0.5-1% of an aminopolycarboxylic acid chelating agent besides water. According to the environment-friendly high-performance titanium alloy polishing composition, on the premise that an oxidizing agent is completely abandoned, perfect balance of high stability, high polishing rate and excellent surface quality is achieved through unique formula design, and the environment-friendly high-performance titanium alloy polishing composition has the advantages of being environmentally friendly and high in safety.

The present application relates to the field of metal processing cooling liquid, especially to a special drawing cooling liquid for aluminum pop can production and a preparation method thereof.The special drawing cooling liquid for aluminum pop can production comprises, in mass percentage, 5-25% of carbon material reinforcing liquid, 5-15% of surfactant, 5-15% of functional additive, 1-5% of antibacterial agent, 5-10% of complexing agent, 1-5% of oil control agent, 0.1-5% of pH regulator, 0.01-0.1% of defoaming agent, and the rest of deionized water.The processing cooling liquid provided in the present application can be used as a special drawing cooling liquid for the drawing and thinning process of aluminum pop can, and can play excellent drawing cooling, lubrication and rust prevention functions simultaneously.

The invention relates to a float glass flow channel waste discharge device which comprises a main cover plate arranged on the upper portion of a flow channel and further comprises an auxiliary cover plate, a first telescopic rod, a plurality of adjusting plates, a sucking pump, a controller, a plurality of thermocouples and an adjusting assembly, the auxiliary cover plate is arranged on the top of the main cover plate, and a closed cavity is formed between the main cover plate and the auxiliary cover plate; a plurality of strip-shaped exhaust holes are formed in the main cover plate and the auxiliary cover plate in parallel and correspond to each other up and down; the length direction of the exhaust holes is parallel to the flowing direction in the flow channel; the adjusting plates are of a right triangle structure and correspond to the exhaust holes in a one-to-one mode, the adjusting plates are attached to the top face of the main cover plate and arranged on one sides of the exhaust holes in a sliding mode, and the right-angle long sides of the adjusting plates are parallel to the extending direction of the exhaust holes. Overall coarse adjustment of the exhaust flow in the length direction of the runner is achieved, and the differential requirements of a high-waste-gas and high-temperature area at the melting furnace end and a low-working-condition area at the tin bath end are accurately met.

The invention discloses an ultrathin heat-resistant polyester film and a preparation method thereof, raw materials comprise a polyester matrix, an antioxidant, a lubricant and the like, the polyester matrix is formed by compounding PET, PEN, polyester liquid crystals and hydroxyl-terminated hyperbranched polyester, and a nanofiller is an aluminum oxide, zirconium oxide and boron nitride compounded system and is matched with calix [4] pyrrole, polyhedral oligomeric silsesquioxane and other components. The preparation method comprises the steps of mixing, twin-screw extrusion and filtration, die head extrusion and cooling, two-way stretching, corona treatment and rolling, and extrusion, stretching and shaping process parameters are controlled. The thickness of the thin film is 5-8 microns, the thin film has excellent tensile strength, low thermal shrinkage rate and high-low temperature cycle resistance, the synergistic effect of the components is remarkable, and the thin film is suitable for high-end ultrathin heat-resistant scenes.

The invention discloses a method and a system for leveling a coil steel metal plate for frame production. The method comprises the following steps: acquiring initial stress distribution data and thickness deviation data of the coil steel metal plate; on the basis of the initial stress distribution data and the thickness deviation data, personalized leveling process parameters are generated by adopting a finite element analysis model; a plurality of leveling roller sets of the leveling system are controlled according to the personalized leveling process parameters to conduct graded pressurizing and leveling, and meanwhile surface flatness data of the metal plate are collected in real time through a laser displacement sensor; and the flatness data collected in real time is compared with a preset standard, and the pressure, the rotating speed and the interval parameters of the leveling roller set are dynamically adjusted. According to the method, personalized technological parameter generation and dynamic closed-loop control are combined, the problems that a traditional leveling method is poor in adaptability to coil steel metal plates in different states, low in leveling precision and prone to secondary stress damage are solved, the leveling efficiency and the finished product quality are remarkably improved, and the rejection rate of follow-up machining of a vehicle frame is reduced.

The invention discloses a continuous winding drum type drawing device, and relates to the technical field of copper wire drawing devices, the continuous winding drum type drawing device comprises a rack, the top of the rack is sequentially provided with a pay-off assembly, a multi-mold drawing assembly and a limiting assembly from left to right, and the pay-off assembly, the multi-mold drawing assembly and the limiting assembly are all installed on the upper surface of the rack through bolts; the multi-winding-drum drawing mechanism and the winding device are arranged on the upper surface of the rack; by arranging the adjustable wrap angle guide assembly, a driving motor drives a screw rod to rotate, so that a movable sliding block moves along the screw rod, the relative position between a first guide wheel and a second guide wheel is changed, a wrap angle formed by winding a copper wire around the two guide wheels is changed, and the contact length and friction force between a wire rod and the guide wheels are adjusted accordingly; therefore, accurate control over tension in the drawing process is achieved, and the problem of wire breakage or quality fluctuation caused by too large or too small tension is solved.

The utility model discloses a storage rack for plastic product production, which relates to the technical field of plastic product storage equipment and comprises a mounting rack, universal wheels arranged at the bottom of the mounting rack through a support, a placement rack arranged in the mounting rack through a rotating shaft, a mounting shell arranged at the top of the mounting rack, and a mounting shaft rotationally arranged in the mounting shell. A first bevel gear is arranged on the mounting shaft through key connection, a second bevel gear is arranged on the rotating shaft and located in the mounting shell through key connection, the second bevel gear is meshed with the first bevel gear, and a plurality of cooling devices are further evenly arranged on the inner wall of the mounting frame. By means of a cooling system composed of the built-in fan and the refrigerating device, under the action of the rotating shaft and the placing frame, plastic products can be driven to rotate, cold air can be forced to convect, the storage space can be evenly covered, deformation or surface defects caused by local overheating of the plastic products are effectively avoided, the cooling and shaping time is shortened, and the production efficiency is improved. The production efficiency is improved.

The application discloses a kind of heterojunction photoelectric detectors and preparation method thereof.The detector includes: substrate;Semiconductor epitaxial structure, at least including channel layer being arranged on the substrate and being located on the barrier layer of channel layer;Wherein, the thickness and component of the barrier layer are configured so that no two-dimensional electron gas is generated at the heterojunction interface between the channel layer and the barrier layer;First electrode and second electrode, set in the semiconductor epitaxial structure and electrically connected with the two-dimensional electron gas, constitute the electrical input end and output end of the heterojunction photoelectric detector.By configuring the thickness and component of the barrier layer so that no two-dimensional electron gas is generated in the channel, the damage of etching process to the channel is avoided, and the ultraviolet detector with extremely low dark current, high photocurrent density and no need to rely on etching process to deplete the channel is realized.

The utility model relates to the technical field of high polymer material crosslinking process, and provides an ultraviolet irradiation crosslinking device for a cable insulation layer, which comprises a plastic extruding machine head used for wrapping an insulation material outside a conductor to form an insulation wire core; the ultraviolet light irradiation cross-linking machine is positioned on one side of the machine head of the plastic extruding machine and is used for performing ultraviolet light irradiation on the insulated wire core; the traction unit is provided with a first guide wheel and a second guide wheel, the first guide wheel movably abuts against the conductor, and the second guide wheel movably abuts against the insulated wire core; the heating unit is positioned between the first guide wheel and the extruding machine head and is used for heating the conductor; the cooling unit is positioned on the side of the ultraviolet light irradiation cross-linking machine and is used for cooling the insulated wire core; the first guide wheel and the second guide wheel jointly ensure that the conductor and the insulated wire core keep proper tension in the whole production process, and ensure that the conductor and the insulated wire core are positioned at correct working positions in the machine head of the plastic extruding machine and the ultraviolet irradiation cross-linking machine.

The invention provides tape casting drying equipment and system for a polyimide film, and relates to the technical field of tape casting drying of polyimide films. The casting drying equipment for the polyimide film comprises a drying box body which is provided with a feeding opening and a discharging opening for materials to pass through, and a plurality of heating areas are formed in the drying box body; the supporting and conveying device is located in the drying box body and used for transferring materials from the feeding port to the discharging port, the supporting and conveying device comprises a plurality of heating rollers distributed at intervals in the horizontal direction, the transmission part is used for driving the heating rollers to rotate, and the conveying belt is arranged on the heating rollers in a tensioning and sleeving mode; the multiple drying devices are distributed in the multiple heating areas in a one-to-one correspondence mode, and the multiple heating areas are distributed in the drying box body in an array mode along the conveying path of the conveying belt. The equipment can solve the problems of surface flaws caused by glue solution disturbance by hot air, 'surface drying 'phenomenon and'hole' defect caused by too fast devolatilization of the surface and the interior of the glue film, and violent'shrinkage 'problem when the glue film is stripped from a base material and dragged in the existing tape casting drying technology of the polyimide film.

The application provides a calendering method of aramid insulation paper, and relates to the field of high polymer chemistry and polymer processing, and comprises the following steps: step one, preheating aramid insulation paper; step two, feeding the substrate into a calendering machine, and performing calendering treatment at a set temperature, pressure and linear speed by using a multi-stage pressure control system; and step three, monitoring the thickness uniformity and surface quality of the aramid insulation paper in real time through an online detection system. The application has the following advantages: through the synergistic effect of multi-stage progressive pressure control, high-precision temperature regulation (±2 ℃) and optimized linear speed, and in combination with machine vision online detection and real-time feedback, the shortcomings of traditional calendering processes are effectively overcome, the surface smoothness, thickness uniformity and mechanical properties of the aramid insulation paper are significantly improved, the precision, efficiency and quality consistency of the production process are greatly improved, and the generation of surface defects such as stripes and corrugations is avoided.

The utility model relates to the field of bicycle fittings paint spraying, disclose a kind of bicycle fittings paint spraying device, including the support platform for supporting, the top of the support platform is rotatably connected with rotary table, the inside of rotary table is rotatably connected with multiple rotating rods, the top of the rotating rod is all fixedly connected with rotary limit disc, the top of the rotary limit disc is rotatably connected in the top of rotary table, the top of the rotary limit disc is all fixedly connected with clamping frame, the top right side of the support platform is fixedly connected with right side support frame, the inside of right side support frame is fixedly connected with right side limit frame, paint spraying assembly is installed in the inside of right side limit frame. In the utility model, the problem of incomplete edge coverage and uneven film thickness caused by spraying is solved, the corrosion resistance, appearance consistency and surface defects such as orange peel and particles are effectively prevented, and the coating quality and durability are improved.

The invention discloses a quantum dot detector preparation method based on a one-step synthesis method, and belongs to the technical field of infrared detectors. The method comprises the following steps: providing a substrate; preparing a bottom electrode on the substrate; preparing a hole transport layer on the bottom electrode, wherein the hole transport layer comprises a NiOx thin film and a PbS-EDT thin film; preparing a quantum dot light absorption layer on the hole transport layer by adopting a one-step synthesis method, wherein the quantum dot light absorption layer comprises 1550nm PbS CQD; preparing an electron transport layer on the quantum dot light absorption layer, wherein the electron transport layer comprises a C60 thin film and a thin film; and preparing a top electrode on the electron transport layer. According to the method, after the 1550nm PbS colloidal quantum dots are synthesized by adopting a thermal injection method, a quantum dot cleaning step is omitted, liquid phase exchange is directly carried out, water and oxygen introduction and ligand damage are avoided fundamentally, the process is simplified, meanwhile, the surface stability of the quantum dots is guaranteed, and the performance and large-scale production potential of an infrared detector are improved.

The invention relates to a preparation method of a high-branching-degree polyolefin film, which belongs to the technical field of polyolefin material processing and modification, and comprises the following steps: mixing a long-chain branched or dendritic high-branching polyolefin modifier with the density of 0.86-0.92 g / cm < 2 >, the MFR of 0.1-10g / 10min and the branching degree of more than 30 / 1000 carbons with a linear polyolefin matrix and an auxiliary agent; melting and shearing the mixture in a double-screw extruder, and carrying out water-cooling pelletizing and drying to obtain modified particles; then, the particles are fed into forming equipment, fused and plasticized at a high temperature, extruded through a mold and subjected to traction stretching and cooling shaping, and finally the high-branching-degree polyolefin film is obtained. In the extrusion blow molding technology, the stability of film bubbles is improved, the melt fracture or drooping phenomenon is prevented, and the processing technology window of the film is widened.

The present application belongs to the field of batteries. The present application provides a kind of pole piece for improving surface flatness, its preparation method and battery, the preparation method includes that the coating layer of pole piece has formed is carried out re-coating, the mode of re-coating is gravure coating, control the particle size of substance in slurry used in re-coating is less than the particle size of substance in the coating layer that has formed, then carries out isostatic pressing treatment, forms re-coating layer.The specific re-coating layer formed by isostatic pressing treatment of the present application can prevent the generation of internal and surface defects of pole piece caused by roll pressing, improve the surface roughness and thickness uniformity of pole piece, effectively improve the surface flatness of pole piece and reduce interface impedance, optimize the solid-solid contact state and effect of electrode active material and solid electrolyte in pole piece, and further improve the cycle stability of battery.