8results about How to "Easy shape control" patented technology

The invention provides composite silver soldering paste and a preparation method and application thereof.The preparation method comprises the following steps that silver nitrate and PVP are dissolved in an ethylene glycol solution, and stirring is conducted for 20-45 min through a constant-temperature magnetic stirrer at the temperature of 45-75 DEG C; adding a certain amount of HCl into the mixed solution, magnetically stirring for 15-30 minutes, and cooling to room temperature; putting the mixture into a reaction kettle, and performing vacuum constant-temperature heating for 150-200min at 100-190 DEG C; and after washing with deionized water and absolute ethyl alcohol, carrying out ultrasonic treatment to obtain the composite silver soldering paste. According to the multi-scale composite silver soldering paste, an ethylene glycol reduction method is adopted, silver ions in a solution are reduced into silver atoms, submicron or micron particles are secondarily grown on the basis of nano-silver particles, and the multi-scale composite silver soldering paste is prepared and has better electrical and mechanical properties; the multi-scale silver particles are easy to generate, the reaction conditions are easy to control, the preparation method is simple, safe and environmentally friendly, the needed raw material types are few, the number of devices is small, few organic matter is added, and the nano-silver particles controllable in morphology and size are easy to obtain.

The embodiment of the invention discloses electronic equipment, a rotating shaft decorating part and a manufacturing method of the rotating shaft decorating part. The rotating shaft decorating part is used for decorating a rotating shaft of the electronic equipment and comprises an outer shell, an inner shell and a connecting layer, the outer shell is of a long-strip cover body structure, the inner shell is located on the inner side of the outer shell, the connecting layer is located between the inner shell and the outer shell and connects the inner shell and the outer shell, and the outer shell, the connecting layer and the inner shell are an integrally-formed structural part. The outer shell is made of a first metal material, the inner shell is made of a second metal material, the hardness of the first metal material is larger than that of the second metal material, the connecting layer comprises the first metal material and the second metal material, and main components of the first metal material are gradually reduced in the direction from the outer shell to the inner shell. And the content of main group elements of the second metal material is gradually increased in the direction from the outer shell to the inner shell. The rotating shaft decorating part is small in thickness and low in deformation risk.

The invention discloses TPU (thermoplastic polyurethane) with deformation easy to recover, a preparation method of the TPU and application of the TPU in manufacturing toys. The TPU raw materials comprise a chain extender, polyisocyanate and one or more polyester polyols; the polyester polyol is formed by connecting an acid structural unit and an alcohol structural unit through an ester bond, the acid structural unit comprises at least one of terephthalic acid, oxalic acid and adipic acid and must comprise terephthalic acid, and the alcohol structural unit comprises at least one of butanediol, propylene glycol and ethylene glycol; the content of hard segments in the TPU ranges from 10 wt% to 50 wt%; tPU is softened at 30-60 DEG C, and is hardened and shaped at 10 DEG C or below. The preparation method comprises the following steps: adding the raw materials into a double-screw reactive extruder for reactive extrusion, and carrying out underwater pelletizing to obtain the TPU.

This invention relates to a large-weight, wide-width high-temperature alloy coil and its manufacturing method, belonging to the field of high-temperature alloy materials. It solves at least one of the following problems existing in the production of wide-width high-temperature alloy sheets: difficulty in controlling dimensional accuracy, poor surface quality, large quality fluctuations, high production difficulty, and high cost. A method for preparing a large-weight, wide-width high-temperature alloy coil includes: slab pretreatment; hot rolling of the coil; solution treatment and surface treatment of the coil; cold rolling and intermediate annealing of the semi-finished coil; and cold rolling and processing of the finished coil. This invention achieves the production of high-quality, high-performance, and high-dimensional-accuracy high-temperature alloy sheets with wider widths and thinner thicknesses.

The invention belongs to the technical field of molecular sieve catalyst molding, and discloses a general molecular sieve catalyst carrier molding method, which comprises: synthesizing a molecular sieve raw material; performing gel crystallization; forming is conducted; aging is performed; according to the technical scheme, multi-stage crystallization treatment is carried out, and the temperature, time and temperature increase rate of each stage of crystallization treatment are limited, so that the growth rate and final size of crystals can be controlled, the crystal form can be better controlled, and most of crystal impurities can be removed; morphological control on the molecular sieve is improved, and the performance of the finally formed molecular sieve is improved; tetrapropylammonium hydroxide and metal salt are added, so that formed metal complex ions are extremely easy to combine with hydroxyl on the surface of the molecular sieve, and subsequent crystallization is facilitated; the pore channel smoothness of the molecular sieve is ensured by optimizing the whole steps, and the structural strength of the molecular sieve is improved.

The invention relates to an exosome separation and extraction method, in particular to a human peripheral blood macrophage exosome separation and extraction method. The invention discloses a method for separating and extracting human peripheral blood macrophage exosomes, which has the characteristics of convenience in collection, safety and reliability compared with a common separation and extraction method, avoids the problems of ethical heredity and rejection anaphylaxis of exosomes of heterologous tissue cells or exosomes of allogeneic tissue cells such as umbilical cord, abdominal cavity and the like, and has the advantages of simple operation and high efficiency. The exosome is easy to apply clinically and is an ideal source exosome.

The invention discloses a device for solving turning deformation of aluminum alloy thin-wall cabin type parts, which comprises a clamp body, a locking screw sleeve, a positioning screw sleeve, a centering block, a mandrel and a cover plate, the locking screw sleeve is arranged on the clamp body, the clamp body and the centering block are mounted on the mandrel through flat keys, an inner positioning thread is arranged on the inner side of the locking screw sleeve, and the cover plate is arranged on the inner side of the positioning screw sleeve. A first locking nut is arranged on the mandrel and arranged on one side of the centering block, the cover plate is arranged at the tail end of the mandrel in a sleeved mode, and a second locking nut is arranged on the mandrel and arranged on one side of the cover plate. A supporting block is slidably arranged on the mandrel, and a compression spring is arranged on one side of the supporting block. A third locking nut is arranged on the mandrel and arranged on one side of the supporting block. One end of the supporting block is of a conical structure. Axial tensioning force is applied to the main shaft end through the positioning threaded sleeve, the middle of the main shaft is supported in a radial auxiliary mode through the supporting block, the tail end of the mandrel is supported through the lathe tail top, the tool centering requirement is met, and elastic and torsional deformation in the machining process is avoided.

The invention discloses a preparation method of a hard carbon material based on waste paper, which comprises the following steps: S1, crushing the waste paper, and cleaning obtained chippings with deionized water to remove a floating layer and oil stain; s2, soaking the cleaned material with a manganese chloride solution, and washing and drying the soaked material; s3, the dried material is subjected to pre-carbonization treatment, and the pre-carbonized material is smashed and screened; s4, carrying out acid pickling on the material obtained in the S3, and after acid pickling, drying, crushing and screening again; and S5, performing high-temperature carbonization on the screened material again to finally obtain the hard carbon material. The precursor of the final product is the waste paper, the basic unit of the material is the papermaking fiber, the material obtained by carbonizing the fiber has good morphology control, and the sodium ion battery made of the obtained hard carbon material has high gram volume and good multiplying power and cycle performance. High-value utilization of wastes is realized, and high economic value is created while the environment is protected.