2results about How to "Increase elastic strength" patented technology

The utility model provides a kind of processing equipment of high elasticity pick racket, belong to racket processing technical field, including core pressing subassembly, including base, the support platform of fixed connection in base end part, the positioning mode of sliding installation in support platform middle, fixed connection in the side wall of support platform's stand, and the pressing block of sliding connection in the side wall of stand, and upper die is fixedly connected in the end of pressing block;Pressure maintaining component, including fixedly connected in the side wall of support platform's shell, fixedly connected in the side wall of shell's fixed plate, slidingly inserted in the end of fixed plate's connecting plate, and the pressing plate of fixedly connected in the end of connecting plate.The utility model has the beneficial effects that: by the cooperation of core pressing subassembly and pressure maintaining component;Ensure that core body and sheet material are preliminarily pressed and fit tightly when guaranteeing pressing process without deviation, improve product consistency, ensure that core body, sheet material and carbon sheet are tightly combined, improve the elasticity and structural strength of racket, and can flexibly adapt to the processing needs of sheet material of different thickness.

The invention belongs to the technical field of oil exploitation, and particularly relates to a foaming agent for nitrogen foam fracturing and a preparation method and application thereof. The preparation method comprises the following steps: (1) sequentially adding trimethylolpropane tri (3-aziridinyl propionate), an organic solvent and 1-amino-3, 6, 9, 12, 15, 18-hexaoxaheneicosan-21-acid into a reactor, adjusting the pH value to 2-3 by using hydrochloric acid, and carrying out heat preservation reaction; (2) adding alkyl halide into the reactor, adjusting the pH value to 8-9 by using sodium hydroxide, carrying out heat preservation reaction, irregularly detecting the pH value in the reaction process, and maintaining the pH value to 8-9 by using sodium hydroxide; and (3) carrying out reduced pressure distillation on the mixed solution in the step (2) to obtain a viscous solid, and drying to obtain the foaming agent for nitrogen foam fracturing. The foaming agent for nitrogen foam fracturing has the advantages of good foaming and foam stabilizing effects and large liquid carrying capacity.