17results about How to "Good shape consistency" patented technology

The invention provides high-dispersity superfine copper powder and a preparation method thereof, and belongs to the technical field of metal materials. The preparation method comprises the following steps: mixing a copper-containing solution, an alkali-containing solution and a reducing agent solution, and reacting to obtain a cuprous oxide precursor; and mixing the cuprous oxide precursor solution, the dispersing agent solution and the reducing agent solution, and reacting to obtain the superfine copper powder. According to the method, a traditional one-step liquid phase synthesis method for the superfine copper powder is abandoned, a two-step method is creatively adopted for preparing the superfine copper powder, and the contradiction between the size of copper particles and the technological capacity is solved. According to the preparation method, the copper particles with smaller sizes can be prepared on the premise that high unit volume productivity is kept, and the prepared copper particles are smooth in surface and uniform in size.

The invention relates to the technical field of hemostatic materials, in particular to a kaolin hemostatic material with an anti-inflammatory function and a preparation method and application thereof. The invention relates to a kaolin hemostatic material with an anti-inflammatory function. The kaolin hemostatic material comprises kaolin loaded with CeO2 nanoparticles. The preparation method comprises the following steps: mixing kaolin with cerium chloride, sodium carbonate and sodium chloride according to a certain mass ratio, then carrying out ball milling to obtain a precursor, and roasting the precursor to obtain the kaolin hemostatic material with the anti-inflammatory function. According to the preparation method, kaolinite which is low in price and rich in reserves is adopted as a raw material, a conventional CeO2 raw material is selected, a CeO2-loaded kaolinite-based nano material is prepared through a mechanochemical synthesis method, and the CeO2 / K nano material with synergistic anti-inflammatory and hemostatic activity is prepared.

The invention discloses a preparation method of a high-entropy Prussian blue analogue material CuCoNiCrMn-PBA (Prussian blue analogue) and a preparation method of the high-entropy Prussian blue analogue material. The preparation method comprises the following steps: dissolving a copper salt, a cobalt salt, a nickel salt, a chromium salt, a manganese salt and sodium citrate in deionized water, dropwise adding the solution and a sodium ferrocyanide salt solution into the deionized water at the same time, carrying out a co-precipitation reaction, adding ascorbic acid after co-precipitation is finished, stirring, and carrying out an Ostwald ripening process to obtain the high-entropy Prussian blue analogue material. When the material is used as a sodium ion battery positive electrode active material, the material has relatively high specific discharge capacity, relatively good cycling stability and excellent rate capability. The high-entropy Mn-based Prussian blue analogue material with multiple elements coordinated with N atoms is synthesized, the Jahn-Teller effect of the Mn element is inhibited while the capacity is provided by multiple transition metal elements, the framework structure is wide and stable, and the method has the advantages of being easy to operate, high in safety, high in yield and the like.

The invention discloses a polishing method of an optical glass lens and cerium oxide polishing powder.The polishing method comprises the working procedure of preparing a cerium oxide polishing solution and the working procedure of polishing the optical glass lens through the cerium oxide polishing solution, and the cerium oxide polishing solution is formed by dispersing the cerium oxide polishing powder in a solvent; the method for preparing the cerium oxide polishing powder comprises the following steps: at 55-65 DEG C, continuously adding a carbonate precipitator into cerium chloride rare earth feed liquid, reacting until the pH value of a system reaches 6.0-6.5 to obtain rare earth carbonate slurry, purifying, adding polyethylene glycol with proper molecular weight, stirring and aging, heating to 90 DEG C or above, and preserving heat; after the heat preservation is finished, carrying out filter pressing, drying, calcining, carrying out water cooling, and carrying out ball milling; according to the method, the cerium oxide polishing solution prepared from the specific cerium oxide polishing powder is used for polishing the optical glass lens, so that the polishing quality is excellent, the polishing efficiency is high, the safety and the environmental protection property are better, and the polishing life is long.

The utility model discloses flat vacuum cup forming equipment convenient to fix, and relates to the technical field of vacuum cup production. According to the flat vacuum cup forming equipment convenient to fix, by arranging the fixing frame, the fixing blocks, the clamping holes, the clamping blocks, springs, fixing plates, bolts, fixing bases and a long pipe, the function of fixing the long pipe is achieved, the long pipe is prevented from moving in the water swelling process, and therefore a round pipe expands according to a preset shape under the uniform pressure environment; the size precision and the shape consistency of the flat vacuum cup can be improved, and the defective rate of products is reduced; by arranging the fixing base, the connecting rod, the connecting frame, the fixing rod, the connecting ring, the electric telescopic rod, the first adjusting rod, the clamping block and the manufactured long pipe, the function of multiple fixing of the manufactured long pipe is achieved, the fixing function of the manufactured long pipe is further enhanced, and the stable fixing mode can prevent the manufactured long pipe from accidentally moving or popping out in the high-pressure water expansion process.

This utility model discloses an integrated zipper template, relating to the field of zipper manufacturing technology, including a base plate module, an injection module, a stress dispersion module, and a positioning assembly module. The base plate module is a supporting base plate, and the top surface of the supporting base plate is provided with a matrix-arranged zipper tooth forming cavity group. The zipper tooth forming cavity group includes several evenly distributed single zipper tooth cavities and material distribution cavities. The injection module includes an injection plate located above the supporting base plate, and the injection plate has an injection channel inside that communicates with the zipper tooth forming cavity group. The stress dispersion module is embedded inside the supporting base plate. The positioning assembly module includes multiple positioning holes on the top surface of the supporting base plate and multiple assembly protrusions on the bottom surface of the injection plate. Through the matrix-arranged zipper tooth forming cavity group and the tree-branch-shaped injection channel, the molten material is evenly distributed, reducing material shortages or air bubbles, and improving the shape consistency and mechanical properties of the zipper teeth.

A medical image generation method based on cycle diffusion and target guided sampling, which generates other target modality medical images from existing source modality medical images by cycle diffusion. In the noise prediction network of the diffusion model of the cycle diffusion model, an additional attention mechanism is introduced to fuse the anatomical structure information in the source modality medical image and the current noise image; at the same time, the anatomical structure segmentation network introduces an anatomical structure shape loss. In training the diffusion model, a perceptual priority weighting P2W training strategy is adopted: by adjusting the loss function weight, the diffusion model is made to preferentially learn the global structure of the image at a high noise level and optimize the image details at a low noise level; at the same time, a target guided classifier for the sampling stage is trained. In the sampling stage: first, the latent code is obtained by reverse sampling from the source modality image; then, under the guidance of the classifier, the target modality probability gradient information is used to guide the sampling process, and the generation of the target modality image is completed.

The present invention discloses a carbon fiber special-shaped protective cabin, which is a polyhedral structure with one side open and no bottom plate, including a composite top plate with the same structure but different shapes and composite end panels at both ends, the carbon fiber outer panels of the composite top plate and the composite end panels are glued and fixed to the outer side of the corresponding polyurethane foam frame, and the carbon fiber inner panel is glued and covered from the inner side of the composite top plate or the inner side of the composite end panel and fixed to the remaining side of the polyurethane foam frame, and is glued and fixed to the inner side of the carbon fiber outer panel. Carbon fiber grooves opening downward are respectively provided at both ends of the composite top plate, and the upper end of the composite end panel is embedded and glued and fixed in the carbon fiber grooves at both ends of the composite top plate, and the other side of the carbon fiber special-shaped protective cabin is an inclined facade, and a shutter is provided at one end of the inclined facade. The present invention can keep the material mechanical properties of the carbon fiber material unchanged, the strength and rigidity of the protective cabin are not affected, the appearance consistency is better, more beautiful, and the assembly operation is simpler.

The present application relates to the field of clothing accessory products, in particular to a production process of a clothing rope belt adjusting buckle, adopting the following mold structure, comprising an upper mold and a lower mold, the upper mold and the lower mold are buckled to form a cavity, a core is arranged at the joint surface of the upper mold and the lower mold, and an extension channel for the core to pass through is arranged between the upper mold and the lower mold; the production process comprises the following steps: a, before the upper mold and the lower mold are closed, each core passes through the extension channel and enters a specified position in the cavity; b, the upper mold and the lower mold are closed, and the core is extruded to fix the position and keep the cavity structure closed; c, mold casting and cooling are performed to fix the shape of the adjusting buckle; d, the core is pulled out of the mold along the extension channel to perform demolding; e, the upper mold and the lower mold are separated to unload, and the adjusting buckle is obtained. The present application solves the problem of high cost of the existing clothing rope belt adjusting buckle.

The invention belongs to the technical field of interventional medical instruments, and particularly relates to a valve frame for a pulmonary valve and the pulmonary valve. The valve frame comprises a tubular middle body, a near-end body and a far-end body, the near-end body and the far-end body are connected to the two axial ends of the middle body respectively, the middle body comprises a plurality of grid structures, the far-end body comprises a plurality of M-shaped unit bodies, the number of the unit bodies is m, and m is a natural number larger than or equal to 2. The pulmonary artery valve comprises a valve leaflet and the valve frame, and the valve leaflet is connected to the valve frame. The valve frame can be evenly expanded, and the overall shape consistency is good. By adopting the valve frame, the pulmonary artery valve can be uniformly expanded, the use requirement on uniform expansion of the pulmonary artery valve is well met, and the use reliability is good.

The utility model relates to a cutterhead and circuit board processing equipment, the cutterhead is configured to be used on the circuit board processing equipment, and comprises a base body, a plurality of bearing parts and a positioning part, and the plurality of bearing parts are arranged on the base body in a matrix mode and are constructed to penetrate through the two opposite ends of the base body in the height direction; the bearing part is provided with a placing hole matched with the cutter; the positioning part is constructed to be at least arranged at the bottom of the base body and is constructed to be used for positioning circuit board processing equipment, and the base body, the bearing parts and the positioning part are constructed to be integrally formed. The cutterhead is simple in overall structure and high in assembly consistency and shape consistency, and cutterhead replacement equipment can transport the cutterhead conveniently and a drilling room can store the cutterhead conveniently. As the base body, the plurality of bearing parts and the positioning part are integrally formed and processed, the processing cost is low, and the structural strength is relatively high.

The invention provides a processing device and method of a field emission cathode and the field emission cathode, and belongs to the technical field of laser processing, and the processing device of the field emission cathode comprises a laser used for emitting laser; the beam expander is arranged at the output end of the laser and used for converting the laser into beam-expanded laser; the spatial light modulator is arranged at the output end of the beam expander and used for converting the beam-expanded laser into modulated laser according to a preset pattern; the optical scaling system is arranged at the output end of the spatial light modulator and used for converting the modulated laser into scaled laser; and the focusing objective lens is arranged at the output end of the optical zooming system and is used for converting the zoomed laser into focused laser. According to the field emission cathode processing device provided by the embodiment of the invention, the field emission cathode can be processed through laser etching, the field emission cathode with good morphology consistency and excellent uniformity can be formed, and the field emission cathode processing device is suitable for large-scale production and processing of the field emission cathode.

The invention relates to medical image processing, in particular to a polyp segmentation model based on position perception feature refinement, an encoder and a lightweight backbone network adopting Transform, and is used for extracting multi-scale semantic features. The decoder adopts a symmetric structure to gradually recover spatial resolution, a plurality of position sensing feature refinement modules PFR are embedded in a shallow layer or multiple layers, attention distribution of shallow semantic features is guided through deep semantics so as to compensate and reconstruct local details, and the position sensing feature refinement modules PFR are embedded in the shallow layer or multiple layers; the decoder further comprises a convolutional layer, a context feature module (CFM), a cross-scale information module (CIM) and a semantic attention module (SAM), and adopts a multi-scale supervision strategy to simultaneously supervise multi-layer output so as to improve the detection and segmentation precision of tiny polyps and boundary pixels; according to the technical scheme provided by the invention, the defect that the tiny polyp is difficult to accurately segment in the prior art can be effectively overcome.

The invention relates to the technical field of metal forming, and provides an assembled metal skirting line raw material bending forming device and method. The assembly metal skirting line raw material bending forming equipment comprises a supporting piece, a detection device, a raw material fixed adjusting device, a material conveying detection device and a bending forming device. The detection device is arranged on the supporting piece and corresponds to the output end of the raw material conveyor; the raw material setting device is arranged on the supporting piece and is matched with the detection device; the material conveying detection device is arranged on the supporting piece; the bending forming device is provided with a feeding hole; wherein the detection device, the raw material setting device, the material conveying detection device and the bending forming device are sequentially arranged in the raw material conveying direction. According to the assembled metal skirting line raw material bending forming equipment, the conditions that a metal skirting line is bent unevenly, the bending angle is inaccurate, and the springback phenomenon occurs can be reduced.

The invention discloses a preparation method of a high entropy Prussian blue analog material CuCoNiCrMn-PBA. The invention dissolves copper salt, cobalt salt, nickel salt, chromium salt, manganese salt and sodium citrate in deionized water, and simultaneously drops the above solution and sodium ferrocyanide salt solution into the deionized water, a coprecipitation reaction occurs, ascorbic acid is added after the coprecipitation is completed, and an Oswald ripening process is performed to obtain a high entropy Prussian blue analog material. The material has a high discharge specific capacity, good cycle stability and excellent rate performance when used as a positive active material for a sodium ion battery. The invention synthesizes a high entropy Mn-based Prussian blue analog material in which a plurality of elements are coordinated with N atoms, and a plurality of transition metal elements suppress the Jahn-Teller effect of the Mn element while providing capacity, and have an open and stable framework structure, and the method has the advantages of simple operation, high safety and high yield.

The present invention discloses a high-precision positioning gear shaft forging device and method, belonging to the technical field of forging equipment. A high-precision positioning gear shaft forging device, including a forging machine case, and also includes: a forging base fixedly installed in the forging machine case, a forging shaping die fixedly installed on the forging base; a mounting plate, which is lifted and arranged in the forging machine case; a hydraulic forging part, which is fixedly installed at the bottom of the mounting plate; the present invention can monitor the downward pressing distance and internal pressure in the forging process in real time by integrating a distance measuring sensor and a pressure sensor, and the real-time data feedback ensures the precise control of the forging process, avoiding errors caused by inaccurate manual judgment, and the precise design and positioning mechanism of the forging shaping die ensure that the metal rod can be shaped according to the predetermined shape during the forging process, thereby improving the dimensional accuracy and shape consistency of the product and reducing the scrap rate caused by shape deviation.

The present invention discloses a preparation method of a ZIF-8 derived carbon-coated modified silicon nanoparticle material and a lithium ion battery pack, wherein the preparation method is as follows: an aminating agent and silicon nanoparticles are added to deionized water and stirred to aminate the silicon nanoparticles, and the amination silicon nanoparticles are obtained by centrifugation, washing and drying; the amination silicon nanoparticles, zinc salts and dimethylimidazole are added to deionized water for stirring reaction, and a solid sample is obtained after centrifugal washing and drying; the solid sample is carbonized at high temperature to obtain a silicon-carbon composite material. When the material is used as a negative electrode active material for a lithium ion battery, high capacity, high capacity retention rate, excellent rate performance and cycle stability are taken into account. The present invention coats the surface of silicon nanoparticles with ZIF-8 derived carbon to synthesize a silicon-carbon negative electrode material by a simple amination treatment, and even under high temperature treatment, the carbon layer is still stably coated on the surface of the silicon particles. It has the advantages of simple operation, high safety and high reaction efficiency.