4results about How to "High quality" patented technology

The application relates to an aluminum-silicon-strontium-titanium-zirconium alloy and an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the same and belongs to the technical field of aluminum alloy welding wires. The alloy components and the weight percentages are as follows: Si: 4.50-5.50%; Mg: 0.01-0.05%; Sr: 0.02-0.50%; Ti: 0.01-0.15%; Zr: 0.01-0.20%; La: 0.01-0.10%; Ce: 0.01-0.15%; C: <0.0010%; the balance is Al and inevitable impurity elements, and the content of the inevitable impurity elements is less than 1.0 wt%. The application further discloses an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the aluminum-silicon-strontium-titanium-zirconium alloy. Through control of the alloy components and the content of each component, the welding wire formed by the application has excellent performance in alloy mechanical properties, casting performance, grain refinement and welding quality.

The invention relates to the technical field of food processing, and particularly discloses a preparation method of high-purity rubusoside, which comprises the following steps: (1) taking a sweet tea leaf raw material, crushing, and extracting with water to obtain a sweet tea powder extracting solution; (2) performing filtration, macroporous resin purification, ion exchange resin decoloration, concentration, drying and crushing on the sweet tea powder extracting solution to obtain a rubusoside crude product; (3) dissolving the rubusoside crude product in a 65-75% ethanol water solution, cooling to 8 DEG C from 60 DEG C, carrying out gradient crystallization, carrying out heat preservation for 1-2 hours, filtering, and drying to obtain a primary crystallization product; and (4) dissolving the primary crystallization product in a 90-95% ethanol water solution, preserving heat at 60 DEG C for 1.5-2.5 h, cooling to 25 DEG C, preserving heat for 3.5-4.5 h, finally cooling to 8 DEG C, preserving heat for 11-13 h, filtering, and drying to obtain the product. Through two-step gradient crystallization, solvent concentration control, temperature gradient design and heat preservation time optimization, the product purity, the crystallization quality and the storage stability are remarkably improved.

The utility model discloses an iron removal device, which relates to the technical field of nano cellulose application and comprises a first temporary storage barrel, a second temporary storage barrel, a permanent magnet iron remover, a first feeding pump and a second feeding pump. A discharging port of the first temporary storage barrel can communicate with a first feeding port of the permanent magnet iron remover, a first discharging port of the permanent magnet iron remover can communicate with a feeding port of the second temporary storage barrel, and a first discharging port of the second temporary storage barrel can communicate with a feeding port of the second feeding pump. A discharging opening of the second feeding pump can be communicated with a second feeding opening of the permanent magnet iron remover, and a second discharging opening of the permanent magnet iron remover can be communicated with a second feeding opening of the first temporary storage barrel; the iron removal device can effectively improve the iron removal efficiency, and is simple in structure and convenient to install, maintain and use.

This utility model discloses a novel terminal riveting device, relating to the field of terminal riveting technology. It includes a workbench, with a terminal feeder and a terminal robot mounted above it. A skeleton feeder is mounted on the side of the workbench. A conveyor channel for transporting workpiece skeletons is located above the workbench, operating intermittently. The conveyor channel is fixedly connected to the workbench via multiple supports. A detection mechanism for detecting the orientation of the skeleton is located on the side of the conveyor channel. A riveting mechanism for inserting terminals into the skeleton is also located on the side of the conveyor channel. This device can promptly alert workers to remove or correct unqualified formed skeletons, ensuring that the riveted skeleton workpieces have superior quality.