7results about How to "High preparation precision" patented technology

The invention relates to a preparation method of a built-in Kevlar skeleton master mold of a helmet. The preparation method comprises the following steps: S1, drawing a three-dimensional model of a helmet structure; s2, drawing a three-dimensional model of a Kevlar skeleton according to the design data of the three-dimensional model of the helmet structure; s3, the three-dimensional model of the Kevlar skeleton and the three-dimensional model of the helmet structure are matched and revised, if the matching is not qualified, the three-dimensional model of the revised Kevlar skeleton is drawn, and if the matching is qualified, the three-dimensional model of the Kevlar skeleton is used as basic data for drawing the three-dimensional model of the Kevlar skeleton master model, and the three-dimensional model of the Kevlar skeleton master model is drawn. The method is used for synchronously designing and manufacturing a master mold for manufacturing the Kevlar skeleton and a silica gel mold, the development period can be shortened, the Kevlar skeleton can be used when a helmet mold is subjected to EPS molding test for the first time, the risk of uncertainty of manual design and manufacturing of the master mold is eliminated through matching confirmation of Kevlar skeleton 3D modeling and helmet 3D modeling data, and the production efficiency is improved. And the first-pass yield and the mass production yield of the test mold are improved.

The invention discloses a preparation process of a skin-friendly thin film of a special skin drawing. The process comprises the steps of preparation of a gauze braided fabric, shaping of the braided fabric, fixing of a frame, accurate alignment, alignment calibration, primary polymer permeation, silk screen sleeve printing, curing forming, multi-round circulation and forming of a skin-friendly layer. The base layer is prepared from a modified polydimethylsiloxane elastic polymer, the skin-friendly layer is formed by a special modified polydimethylsiloxane superelastic polymer, and functions and skin-friendly performance are both considered; and by combining multi-machine-head silk-screen printing, multi-temperature-section curing and multi-round process circulation, customization of the number of layers, the thickness and the function of the thin film is achieved. The method has the advantages of whole-course numerical control automation, stable production, high efficiency, low cost, suitability for industrial batch production, stable film structure, long service life and good use experience.

The utility model provides a weighting structure of quartz tuning forks, which is used for weighting a plurality of quartz tuning forks distributed in a tuning fork array, and comprises a mask plate which is arranged at an interval with the tuning fork array, and the spacing distance between the mask plate and the tuning fork array is greater than the thickness of a weighting layer on the quartz tuning forks; a mask window is formed in the position, corresponding to each weighting layer, of the mask plate. In the scheme, the mask plate and the tuning fork array are arranged at an interval, and the spacing distance between the mask plate and the tuning fork array is greater than the thickness of the weighting layer on the quartz tuning fork, so that the edge of the weighting layer can be prevented from being adhered to the inner wall of the mask window during weighting; therefore, the problem that in the prior art, a weighting layer of a small and medium-sized quartz tuning fork adheres to a mask to generate silver scraps is solved, and the preparation precision of the small-sized quartz tuning fork is improved.

The application provides a wing connecting piece mold structure and a wing connecting piece manufacturing method. The wing connecting piece mold structure comprises a mold base, a foam sandwich layer, a side mold assembly, a first upper pressing plate, a second upper pressing plate, a third upper pressing plate, a fourth upper pressing plate, a lower pressing plate assembly, a main beam, an auxiliary beam and a plurality of side core-pulling devices. The foam sandwich layer is installed in the mold base. The first upper pressing plate, the second upper pressing plate, the third upper pressing plate, the fourth upper pressing plate and the lower pressing plate are all installed in the foam sandwich layer. The main beam and the auxiliary beam both penetrate through the mold base. The side core-pulling devices are detachably installed on the foam sandwich layer. The application provides a reasonable connecting piece mold structure. The mold can be used to manufacture a carbon fiber composite connecting piece between a transition section and an upper reverse section of a wing of an unmanned aerial vehicle. The mold can improve the preparation precision of the carbon fiber composite connecting piece, reduce the preparation cost, realize the effect of reducing the weight of the finished product and finally meet the design requirements of the strength and precision of the whole wing.

The invention relates to the technical field of laboratory automation equipment, in particular to an integrated automatic system and method for solid-liquid separation and scanning electron microscope sample preparation. The system comprises a to-be-separated solid-liquid mixture storage table; the high-flux solid-liquid separation module comprises a plurality of solid-liquid separation channels; the SEM sample table library is provided with a plurality of SEM sample tables, and each SEM sample table is covered and pasted with a conductive adhesive tape; a nozzle of the automatic purging module can be aligned with the upper part of each conductive adhesive tape; a mechanical transfer module; and the intelligent control module is in electric control connection with the high-flux solid-liquid separation module, the automatic purging module and the mechanical transfer module. The method comprises a high-flux solid-liquid separation step and an SEM sample preparation step. The system and the method solve the technical problems that in the prior art, efficiency is low, sample consistency is difficult to guarantee, cross contamination and random errors are likely to be introduced, and authenticity and reliability of observation results are affected.

The invention discloses a preparation method of a chip, which is suitable for the technical field of semiconductors, and the preparation method comprises the steps: pasting a wafer on a cutting adhesive tape, the cutting adhesive tape comprises a first surface close to one side of the wafer and a barrier layer arranged on the first surface, and the barrier layer extends into the cutting adhesive tape from the first surface, the surface, close to one side of the wafer, of the barrier layer is flush with the first surface, the wafer comprises a cutting channel, and the orthographic projection of the cutting channel on the first surface is located in the area range where the barrier layer is located. And cutting the cutting channels of the wafer so as to cut the wafer into a plurality of chips. According to the technical scheme, the chip preparation precision is improved.