4results about How to "Reduce or avoid the generation of" patented technology

The embodiment of the invention discloses a novel mold device for producing a fuel tank and a control method. According to one specific implementation mode, the novel mold device comprises a mold, a mold cavity and a pipeline are formed in the mold, the pipeline is arranged around the mold cavity, and an inlet and an outlet are formed in the outer surface of the mold and connected with the two ends of the pipeline respectively; the cooling box, the first liquid inlet and the first liquid return opening are respectively connected with an inlet and an outlet of the mold through pipelines; a heater and a temperature detector are arranged in the heating box, and a second liquid inlet and a second liquid return opening of the heating box are connected with an inlet and an outlet of the mold through pipelines respectively; in the process of producing the fuel tank, the inlet of the mold is only communicated with the cooling box or the heating box at the same time. According to the mold device, the heating box is connected, so that the temperature difference between the mold cavity and the environment (especially in summer) can be reduced, condensate water is prevented from being generated, and the reject ratio of uneven surfaces of products caused by the condensate water is reduced.

This invention discloses a tungsten inert gas (TIG) shielded welding method and argon protection system for 5083 aluminum alloy pipes. The system includes an argon source, an argon pressure regulating component, a flow regulating component, and a low-emission polymer material gas delivery hose. One end of the gas delivery hose extends into the 5083 aluminum alloy pipe to be welded, supplying gas to the back area corresponding to the weld root. The welding method includes machining a single-sided V-groove at the pipe end, forming a root gap by butt welding, performing argon gas replacement, and using TIG shielded welding for the root pass. During welding, argon gas diffuses through the root gap to the back of the molten pool, achieving back-side protection and assisting in the removal of oxide impurities and fumes. This invention can reduce the risk of argon gas transport contamination, reduce weld shadow defects, improve the stability of the back-side formation of the root pass, and increase welding efficiency.

The invention discloses a method for separating rare earth and fluoroaluminum in a high-fluoroaluminum and low-rare-earth-content material, and belongs to the field of rare earth hydrometallurgy. Aiming at the technical problems of poor selectivity and easiness in emulsification when the materials are treated by an existing single extraction system, a five-component synergistic extraction system is adopted, a mixed extraction agent is prepared according to the volume ratio of P204: P507: TBP: sec-octanol: diluent, and after hydrochloric acid pretreatment and ammonia water saponification, three-stage to six-stage counter-current extraction is carried out on the mixed extraction agent and the pretreated material liquid subjected to pH regulation. Rare earth is selectively extracted into an organic phase, fluorine and aluminum are enriched in raffinate, and efficient separation is achieved. And the rare earth-loaded organic phase is subjected to reverse extraction with high-concentration hydrochloric acid to obtain a concentrated rare earth solution, and trace rare earth in raffinate can be recovered through oxalic acid precipitation. Through the synergistic effect of specific components, the separation selectivity is remarkably improved, extraction emulsification is effectively avoided, stable operation of the process is guaranteed, and the method is particularly suitable for efficient treatment of complex high-fluorine-aluminum low-rare-earth materials.

The invention discloses an endangium fixing device and an endangium fixing method, and belongs to the field of medical instruments, the far end of an inner core sleeved in an outer sheath is an elastic support capable of automatically expanding and sequentially surrounded by a plurality of skeletons, an inner cavity is communicated with a guide wire cavity of the inner core, and a rivet is mounted on the outer surface of the elastic support; after the intimal fixator passes through the flow-limiting interlayer along the guide wire, the sheath is withdrawn, the elastic support is released, the elastic support is automatically expanded, and the rivet is unfolded in a barb shape; the inner core is withdrawn, the barbs penetrate into the blood vessel wall and fall off from the elastic support, and an interlayer in the blood vessel cavity is fixed; and the outer sheath is pushed, the elastic stent is recovered into the outer sheath, and the intima of the artery is fixed. The invention has the advantages that: for the serious interlayers generated after simple endarterium injury caused by trauma and artery occlusion lesion balloon dilatation molding, the injured endarterium can be fixed, and the generation of flow-limiting interlayers can be reduced or avoided, so that the use of the stent is reduced, the treatment cost is reduced, and the long-term treatment effect is improved.