5results about How to "Avoid uneven density" patented technology

The invention discloses a preparation method of a tungsten-nickel target material for electrochromic intelligent glass, and relates to the technical field of tungsten-nickel target materials, and the preparation method comprises the following preparation steps: uniformly mixing N powder and W powder to obtain W-N mixed powder; the W-N mixed powder is put into a graphite mold to be flatly laid; putting the graphite grinding tool filled with the W-Ni mixed powder into a vacuum hot-pressing sintering furnace, firstly increasing the pressure to 6-10MPa, maintaining the pressure for 10-15min, and then releasing the pressure; the method comprises the following steps: vacuumizing a vacuum hot-pressing sintering furnace to below 5Pa, then carrying out three-stage heating to 1250-1300 DEG C, carrying out heat preservation for 30-60 minutes after heating is finished, then carrying out two-stage pressurization to 35-40 MPa, carrying out heat preservation and pressure preservation for 90-150 minutes, and then cooling to 100-200 DEG C along with the furnace to obtain a WNi alloy target blank; the temperature field is uniform through three-section heating, radial shrinkage is inhibited through pressure supplement, and finally, uniform and fine grain structures are obtained while the density of the target material is improved through a two-section pressurizing mode.

The invention belongs to the technical field of coke oven coking, and particularly discloses a method for improving the single-oven yield of a tamping coke oven, which comprises the following steps: firstly, uniformly loading crushed and screened coal into a coal box of a tamping machine; the tamping machine is started to tamp and compact the coal in the coal box, the thickness of the tamped coal is 80 cm, and then the coal continues to be added into the coal box and tamped to enable the height of the finally tamped coal cake to be 4 m; finally, coal cakes formed after tamping are pushed into a carbonization chamber through a coke pushing machine to be heated, so that the coal cakes are dried in the carbonization chamber, and the coal cakes are converted into coke after being decomposed. Aiming at the problems of low briquette bulk density and discontinuous internal structure caused by non-uniform coal distribution at present, the invention improves the overall bulk density and structural uniformity of the briquette by optimizing a feeding mode and a briquette forming form, so as to solve the problems of low briquette bulk density, discontinuous internal structure and poor structure uniformity caused by non-uniform coal distribution during tamping in the prior art. Therefore, the single-furnace yield of the tamping coke oven is influenced.

The application discloses a kind of composite lithium metal negative electrode material and preparation method thereof, it is related to electrochemical energy storage technical field, the method comprises: the three-dimensional porous carbon framework of pore size 50 to 500 nanometers is constructed, and 2 to 10 nanometer nitrogen-doped carbon layer is coated on its inner wall;Metal lithium is fused with lithium nitride to form lithium-rich melt;Capillary force is used to make molten lithium infiltrate into framework channel, in-situ generation and C-Li-N gradient interface phase;Lithium directional solidification is realized by programmed temperature cooling;Surface deposition 50 to 150 nanometer amorphous aluminum oxide passivation layer;Again, the final material is obtained by aging treatment.The application realizes lithium uniform loading, interface high ionic conductivity, structural integrity and high safety by the above technical scheme, significantly inhibits lithium dendrite growth, improves cycle stability and energy density consistency.

The utility model discloses an automatic demolding structure for medicine tabletting. The automatic demolding structure comprises a base, a plurality of pressing grooves are evenly formed in the top face of the base, lower mold plates are arranged in the pressing grooves in a sliding mode, a movable plate is arranged in the base, a plurality of springs are evenly and fixedly connected to the top face of the movable plate, and the top ends of the springs are fixedly connected with the bottom faces of the corresponding lower mold plates. A fixing frame is fixedly connected to the side wall of the base, a pressing plate is slidably arranged on the top of the side, close to the base, of the fixing frame, and a plurality of upper molds are fixedly connected to the bottom face of the pressing plate and correspond to the pressing grooves one to one. According to the utility model, the upper die and the lower die plate are matched through components, so that medicines can be extruded in two directions, the lower die plate can be finely adjusted in a self-adaptive manner along with compression of the tablets, the tablets are ensured to be subjected to vertical and uniform pressure in the material pressing groove, non-uniform density of the tablets caused by non-uniform stress is avoided, and the lower die plate can dynamically and slightly move in the tablet pressing process, so that the tablet pressing efficiency is improved. Friction retention between the tablets and the inner wall of the mold is reduced, and the mold sticking risk is reduced.

The application discloses a kind of magnet two-way pressing forming equipment and process for bonding neodymium iron boron, belong to magnetic powder die pressing field.The device includes: stamping mechanism, including frame body, the stamping seat is vertically slidably installed on the frame body, the frame body is installed for driving the drive assembly of the stamping seat movement, the upper punch is installed on the stamping seat;Outer die mechanism, including the lower die plate vertically slidably installed on the frame body, magnetic powder is poured into lower die plate, the transmission assembly for driving the lower die plate movement is installed on the frame body.Drive assembly and transmission assembly are driven to drive upper punch and lower die plate to approach each other to complete stamping, this kind of pressing mode effectively avoids the problem that the upper half area and lower half area of magnetic powder located in lower die plate are significantly different in stress, which leads to subsequent uneven pressing density, avoid shrinkage rate inconsistency in subsequent solidification process to appear defective product, and effectively guarantee the performance of magnet.