13results about How to "Fully moistened" patented technology

This utility model relates to the field of packed tower technology, and in particular to a high-efficiency and energy-saving packed tower. Its technical solution includes a tower body, with an inlet pipe on one side for introducing the gas to be treated, an outlet pipe at the top for discharging the gas, and a liquid outlet pipe at the bottom. A packing frame for support and fixation is provided inside the tower body. Large-sized bulk packing, structured packing, and small-sized bulk packing are sequentially arranged on the top of the packing frame. A spray structure for promoting sufficient gas-liquid contact is provided inside the tower body. This utility model, through the arrangement of a spiral nozzle, a fan-shaped nozzle, a servo motor, a threaded rod, a bevel gear one, a bevel gear two, a vertical rod, and an annular ring, ensures uniform liquid distribution while also allowing for adjustment of the spray height based on multiple factors. This ensures that the liquid fully wets the packing, guarantees sufficient mass transfer area utilization, and improves separation efficiency.

This invention provides a surface mount reflow soldering method and apparatus. The method includes: pre-treating the solder paste state and performing reference positioning correction on the PCB pads to align the PCB pads with the target pad area; using an electroformed stencil with inverted conical openings and a surface nano-coating, printing the pre-treated solder paste onto the PCB pads under closed-loop monitoring; placing the printed PCB in a reflow soldering chamber, and strictly controlling the residual oxygen content in the chamber below a preset critical value through a closed-loop oxygen concentration control system; and performing thermal history control of the reflow soldering peak temperature, holding time, and cooling temperature based on the melting point characteristics of the solder paste to complete the soldering process. This improves printing transfer efficiency, reduces soldering oxidation problems, and ensures sufficient melting and wetting of the solder.

The invention discloses a cleaning method for a semiconductor photoetching mask substrate, and belongs to the technical field of semiconductor manufacturing. According to the method, dynamic cleaning logic of step cooperation and energy matching is adopted, and the steps of interface wetting and pre-cleaning, chemical soft interface construction, low-damage mechanical stripping and synchronous washing, targeted reaction clearing, microstructure deep cleaning, interface dehydration and modification and final energy-assisted drying are sequentially executed. The method is characterized in that through the dependency relationship of chemical interface softening and low-damage mechanical stripping in sequence, the rotation speed of a substrate in each step is strictly controlled to meet the specific dynamic relationship (V2 < V1 < V4 < V3 < V5 < V6), and precise cooperation of chemical action, physical stripping and energy field cleaning is achieved. The contradiction between efficiency and substrate damage in a traditional cleaning process is effectively solved, full-scale pollutants from micron-scale particles to nano-scale molecular contamination can be removed without dead corners, and a clean, stable and secondary pollution resistant surface state is actively reconstructed at a cleaning end point; and the cleanliness and the service life of the mask substrate and the yield of a downstream photoetching process are remarkably improved.

The application discloses a kind of liquid lithium battery negative pole coating material and preparation method thereof, belong to lithium battery negative pole material technical field.The application uses ethylene tar as raw material, sequentially through filtration, distillation, polymerization, blending process, produce the liquid lithium battery negative pole coating material provided by the application is used for the coating treatment of lithium battery graphite negative pole material, can be fully wetted with graphite negative pole material, bonding;The "core-shell" structure formed after the graphite negative pole material is treated using the liquid coating material, including core and the coating layer coated on the surface of core.Coating layer is firm, stable, and presents uniformity.The liquid lithium battery negative pole coating material is in liquid state at normal temperature, and has good flowability;Coking value is higher;It is easy to store, convenient for transportation and use.

The utility model relates to the technical field of feed processing, in particular to an anti-blocking feed storage bin discharging device which comprises a shell, a material bearing plate, an electric conveying belt, a material guide plate, a discharging hopper and the like. A feeding hole and a powder bin are formed in the upper part of the shell; a material bearing plate used for bearing medicine powder is rotationally connected into the powder bin and can be driven by an electric motor to rotate. An electric conveying belt used for conveying wet forage is installed in the shell, located under the feeding port and arranged downwards in an inclined mode from left to right. An inclined material guide plate is fixedly connected into the shell, the inclination direction of the material guide plate is consistent with that of the electric conveying belt, and the left end of the material guide plate is aligned to the right end of the electric conveying belt; and the lower side of the shell is fixedly connected with a discharge hopper for discharging the mixture. According to the utility model, wet forage is extruded and punctured by matching the extruding plate with the barbed rod, so that mutually hooked forage balls are effectively separated, and the problem of blockage caused by the balls is avoided.

This utility model relates to the technical field of concrete testing and discloses a permeable concrete permeability coefficient testing device, including a test platform and a fixed base set at the bottom of the test platform. A water collection tank is slidably installed at the middle of the top of the fixed base, and a placement frame is fixedly installed at the middle of the top of the test platform. A rectangular opening is opened at the middle of the top of the test platform. A water tank is fixedly installed on the right side of the test platform near the rear. A suction pump is fixedly installed at the middle of the top of the water tank. Through the cooperation of the components such as the bearing plate, servo motor A, fixed frame, turntable, fixed shaft, sliding frame, guide plate, guide rod, connecting rod, lifting plate, U-shaped rod and top plate, the top plate can be moved upward after the test is completed, so as to push the permeable concrete sample after the test to the outside of the placement frame, which is convenient for the staff to take out. This solves the problem of inconvenience in the existing method of handling, and the effect is good.

The invention discloses a board-level packaging structure and a manufacturing process thereof, the board-level packaging structure comprises a packaging body and a terminal, at least part of the terminal protrudes out of the surface of the packaging body, the side wall of the terminal is provided with a step-shaped structure, and a metal surface area capable of being wetted by welding flux is formed on the lower portion of the step-shaped structure. According to the invention, the wettability side surface is created through the step-shaped structure, so that the liquid solder can fully wet and wrap the side wall of the terminal, a firm, complete and void-free three-dimensional welding interface is formed, and the connection reliability is greatly improved; the effective welding area is increased, the interface thermal resistance is reduced, and the heat dissipation capability is improved; meanwhile, the firm lateral connection enhances the mechanical stress and thermal stress resistance of the packaging body, so that the power cycle life is prolonged, and the overall reliability is improved; on the basis of a mature board-level packaging process, only a pre-cutting step needs to be added before a final cutting process, so that the technological process is slightly changed, the equipment compatibility is high, the implementation is easy, and the cost is controllable.

The utility model discloses a kind of electric appliances with humidification function, it is related to small household electrical appliances technical field, wherein, electric appliance includes main body, wet curtain component, water distribution structure, fan assembly and switch component. Main body is equipped with main body cavity extending up and down, upper portion is equipped with upper water cavity, bottom is lower water cavity, wet curtain component is located in main body cavity, its lower end is inserted into lower water cavity, and wind channel that is connected with air inlet and air outlet is defined. Water distribution tray is located at the top of wet curtain component, is equipped with water distribution hole, so that the water of upper water cavity evenly moistens wet curtain. Fan assembly is located above water distribution structure, drives air to blow out after flowing through wet curtain from top to bottom. Switch component is located between upper water inlet and water distribution tray, using mechanical control mode, without water pump, avoid blockage problem due to scale or impurities. The scheme is supplied by gravity, mechanical control and fan high-level arrangement, simplify structure, improve humidification efficiency, and effectively prevent the influence of water accumulation on fan, ensure that equipment runs stably and reliably.

The application discloses a sawing machine device for processing vehicle metal parts, and belongs to the technical field of sawing machines, which comprises a sawing machine base, a sawing machine frame arranged on the sawing machine base, saw blade hubs arranged at two ends of the sawing machine frame, saw conditions used in cooperation with the saw blade hubs to support two ends of the saw conditions and drive the saw conditions to rotate, guide rail plates arranged on the sawing machine frame to provide a guide path for the saw conditions, first guide columns and second guide columns which jointly provide guide support for the saw conditions, clamping mechanisms used for clamping parts to be processed, cooling liquid pipes which extend from lower parts of the second guide columns and have nozzle ends located directly above the saw conditions, and cooling and temperature-lowering components arranged on a section of the circumferential side of the saw conditions between the second guide columns and the parts to be processed and used for guiding cooling liquid sprayed from the cooling liquid pipes to flow along a sawing direction of the saw conditions to the parts to be processed. The application fully wets a contact surface of saw teeth and a workpiece, and significantly improves heat dissipation efficiency.

This invention relates to the field of tape technology, specifically to an ultra-thin green PET pressure-sensitive adhesive tape with a high gyrometric coating reinforcement. The tape comprises a green PET substrate with a thickness ≤12μm and a primer reinforcement layer and a pressure-sensitive adhesive layer sequentially arranged therefrom. The primer reinforcement layer consists of an anchoring primer layer, an intermediate primer layer, a borate ester dynamic covalent pre-organized layer, an iron-citric acid slow-release coordination layer, a free trivalent iron locking layer, and a pH recovery and shaping layer. Through multi-layer synergistic action, it maintains high surface energy for a long time, significantly improving the interfacial bonding strength with water-based pressure-sensitive adhesives, resistance to damp heat aging, and resistance to die-cutting edge warping, while maintaining the flexibility of the substrate, making it suitable for the field of precision electronic assembly.

The application provides an activation method of a fuel cell stack, which comprises the following steps: (1) operating the fuel cell stack under target conditions; (2) reducing the load of the fuel cell stack until the load is 0, and cooling the stack and purging the stack at the same time until the inlet humidity of the stack reaches an over-humidification state; (3) loading the fuel cell stack under the over-humidification state and continuously operating the stack so that the stack is fully wetted; (4) reducing the load, and cooling the stack and purging the stack at the same time until the temperature of the stack returns to the temperature of the stack before the cooling of the stack in step (2); and (5) detecting the performance of the stack under the target conditions, if the performance of the stack meets the standard, the activation is completed, if the performance of the stack does not meet the standard, steps (1)-(4) are repeated until the performance of the stack meets the standard. The activation method provided by the application can fully wet the proton exchange membrane and the polymer electrolyte ionomer, and the activation time is shortened.

This application relates to the field of wave soldering carrier technology, and provides a wave soldering carrier and wave soldering equipment. The wave soldering carrier includes: a carrier body, the carrier body having an upper carrier surface and a lower carrier surface disposed opposite to each other, the upper carrier surface having a first bearing area and a second bearing area, the first bearing area being used to support the main body section, and the second bearing area being used to support the reinforcing section; the second bearing area having a reinforcing limiting groove, the reinforcing limiting groove being used to limit at least a portion of the reinforcing section having a reinforcing plate, the bottom wall of the reinforcing limiting groove having a first clearance opening communicating with the lower carrier surface, when the flexible circuit board is loaded on the carrier body, the pins of the device to be soldered extend into the first clearance opening through the reinforcing plate and the flexible circuit board, and the bottom end of the pin is flush with the lower carrier surface, or the bottom end of the pin protrudes from the lower carrier surface.

A plant-based dispersion composition, a plant-based beverage and a preparation method thereof. The plant-based dispersion composition includes natural dietary fiber, maltitol, oat β-glucan and hawthorn powder; the natural dietary fiber includes seaweed dietary fiber and at least one selected from oat dietary fiber, vegetable dietary fiber and fruit dietary fiber; the seaweed dietary fiber includes fucoidan; the particle size D50 of the plant-based dispersion composition is 5-100 μm. The plant-based beverage of the present invention includes a dispersant and the plant-based dispersion composition stably dispersed in the dispersant, the content of the plant-based dispersion composition is 5-30 wt%, the dispersant includes one or more of deionized water and mineral water. This plant-based beverage is stably dispersed and has a delicate taste. It can be used for gastrointestinal function conditioning, inhibiting Helicobacter pylori adhesion and assisting in protecting the gastric mucosa, improving defecation discomfort and reducing the level of inflammatory factors, while enhancing satiety and making blood glucose release more stable.