35results about How to "Processing technology is easy to control" patented technology

The invention discloses a nano-polyamide composition with metallic luster and a preparation method thereof, which comprises the following raw material components in parts by weight: 100 parts of polyamide resin, 5-40 parts of nano-polyamide masterbatch, and 0.3 parts of metallic pigment ~2 parts, 0.05~1 part of dispersing aid, and 0.5~2 part of processing aid; wherein, the nano-polyamide masterbatch is a self-made product, including nanoparticles and dispersing aid, and the total amount contained in the nano-polyamide composition The weight ratio of nanoparticles to the total dispersion aid is 4:1~52:1. The present invention selects self-made nano polyamide masterbatch as reinforcing material, interacts with core-shell type dispersant, compound with polyamide resin, supplemented with corresponding processing aids, obtains a nano polyamide composition with metallic luster, It has good mechanical properties and surface properties, excellent surface rigidity, scratch resistance, oil resistance and adjustable gloss. It can be used in household appliances, automobiles and other non-spraying materials with metallic luster.

The invention discloses a drawing method, in particular an aerospace hemisphere part drawing method, and belongs to the technical field of aerospace. The method comprises positioning of a hemisphere machined part in a drawing mold in pre-high-temperature environment for predrawing and hot drawing. The hemisphere drawing method solves the problems of high scrap rate, easiness in pulling fragmentation and high production cost in the prior art, and adopts twice drawing and setting in high-temperature environment to effectively prevent pulling fragmentation in the hemisphere drawing process; and the drawing method is lower in auxiliary condition requirements and easy to realize, reduces the production cost, further improves the production efficiency, guarantees the product quality, and is high in practicability.

The invention discloses a nonlinear self-correcting resonance type surface acoustic wave temperature sensor, which comprises a substrate, an interdigital transducer, a first metal reflecting grating array and a second metal reflecting grating array. The acoustic surface wave on the substrate has natural unidirectivity in a phase velocity propagation direction, an energy flow angle PFA exists in agroup velocity propagation direction and the phase velocity propagation direction, and the absolute value of PFA is smaller than or equal to 10 degrees; and the acoustic aperture directions of the interdigital transducer, the first metal reflecting grating array and the second metal reflecting grating array are perpendicular to the phase velocity propagation direction, and the bus bar direction ofthe interdigital transducer is parallel to the energy flow angle PFA direction. The resonance type surface acoustic wave temperature sensor based on the design has a low-frequency resonance peak anda high-frequency resonance peak. According to the invention, low-frequency and high-frequency characteristic resonance peaks are utilized; through a self-difference method, nonlinear self-correction of the sensor is achieved, and the small size of a single device is kept; meanwhile, a problem that when a single resonance peak of an existing single resonator is used, frequency signal demodulation is affected by a wireless path is solved, and calibration avoidance of the sensor in the using process is achieved.

The invention discloses a process for processing prepared rehmannia root. The method includes: firstly steaming raw rehmannia root with saturated steam and collecting the generated rehmannia root juice, performing cooling to 50-65DEG C, extruding the rehmannia root, then introducing saturated steam to conducting steaming and collecting rehmannia root juice; and drying the well steamed prepared rehmannia root for 8-10h, then adding the rehmannia root juice to conduct stewing for 10-16h, and then further performing drying for 40-50h. The prepared rehmannia root processed by the method provided by the invention has a verbascoside content up to 0.040-0.057%, which is significantly higher than the requirement of 0.02% in 2010 edition ''Pharmacopoeia of the people's republic China'', and the processed prepared rehmannia root has stable quality and high qualified rate.

The invention discloses a shielding case and a manufacturing method of the shielding case. The shielding case comprises an insulating case body and a metal conducting layer arranged on the outer side of the insulating case body. The thickness of the metal conducting layer is 0.001mm-0.003mm. The shielding case and the manufacturing method of the shielding case have the advantages that the shielding case is formed by arranging the metal conducting layer on the insulating case body, the structure is light and simple, working procedures are simple, processing efficiency is high, and assembly cost is low.

The invention discloses a machining technology of cotton fiber and metal wire blended yarn, and relates to the technical field of blended yarn. The technology includes the following steps of firstly, preparing metal wires; secondly, preparing cotton fiber; thirdly, conducting blending; fourthly, conducting softening, drying and sizing. The technology is simple and controllable, strict high temperature and high pressure conditions are not needed, and the prepared blended yarn has beautiful metal color and luster and is excellent in electromagnetic radiation resisting, static electricity resisting and bacteria resisting performance and is comfortable and breathable; by means of softening, drying and sizing, the color fastness and softness of the cotton fiber are improved, the roughness of textile is reduced, and elasticity and strength are rich.

The invention discloses a method for processing a large-diameter figure-eight-shaped hole series. The hole series comprises a first hole and a second hole which are crossed in parallel to form a figure-eight shape and are cut by a boring tool in a vertical boring way, and the range of a cutting edge angle Alpha of the boring tool is not less than 72 DEG and not more than 90 DEG; and the method comprises the steps as follows: 1), placing workpieces onto a vertical boring worktable and enabling the front end surfaces of the workpieces to face up, and enabling the shaft lines of the first hole and the second hole to be in the perpendicular direction and parallel to a vertical boring spindle; 2), aligning the shaft center of the first hole by a dial indicator and enabling the front end surfaces of the workpieces to be perpendicular to the vertical boring spindle, clamping and fixing the workpieces; 3), carrying out pre-boring, semi-fine boring and fine boring on the first hole in sequence, and blowing away cuttings by compressed air; 4), aligning the shaft center of the second hole on the basis of the shaft center of the first hole; 5), carrying out pre-boring, semi-fine boring and fine boring on the second hole in sequence, and blowing away the cuttings by the compressed air; and 6), deburring, chamfering, and finishing the workpieces. According to the method, the processing precision and the working efficiency are improved; and the method is suitable for cutting the large-diameter figure-eight-shaped hole series in large rotary screw rods or other large workpieces.

The invention discloses a shielding case and a preparation method of the shielding case. The shielding case is composed of a supporting layer with certain strength and a conducting layer which is compounded on the outer side of the supporting layer. The supporting layer is non-conducting, and vicat softening temperature of the supporting layer is not lower than 100 DEG C. Metal materials used in a traditional shielding case product and metal stamping forming technology adopted in the process of machining are changed, and ordinary plastic composite metal foil rubber belt materials and plastic die cutting machining technology are adopted. An ordinary cutting die is used for cutting and machining plastic materials and metal foil rubber belt, raw material cost is low, machining technique is easy to control, and die cost and machining cost are low. Obtained products can effectively be shielded from electromagnetism.

The invention discloses a rice seedling substrate which is prepared from 30%-35% by mass of rice husk, 25%-30% by mass of mushroom residue, 20%-25% by mass of vermiculite and 15%-20% by mass of an organic fertilizer by mixing, a preparation method of the rice seedling substrate comprises the following steps: 1) stacking the rice husk into piles, then adding an appropriate amount of water, and sprinkling zymocyte for fermentation at 35-40 DEG C for 24 hours; 2) evenly mixing the fermented rice husk in the step 1), the mushroom residue, the vermiculite and the organic fertilizer according to the above formula evenly, and then drying to obtain a mixture; and 3) crushing the mixture prepared by the step 2) to obtain the rice seedling substrate. By the way, the processing technique is simple, easy to control, and low in cost, the prepared rice seedling substrate which is rich in a variety of trace elements and active bacteria, and the transplanting survival rate of rice seedlings can be effectively improved.

The invention relates to a fuel cell board molding manufacturing device which comprises a fixed frame, a fixed block, two moving sliders, an upper hydraulic cylinder and a lower hydraulic cylinder. The fixed frame comprises two parallel brackets, the fixing block is fixed on the fixed frame, a guide rail is arranged on the fixed frame, and the moving sliders are slidingly connected to the fixed frame and can slide up and down along the guide rail. The two moving sliders are disposed above and below the fixed block, a lower end surface of the upper hydraulic cylinder abuts against an upper endsurface of the upper moving slider, an upper end surface of the lower hydraulic cylinder abuts against a lower end surface of the lower moving slider, the upper and lower surfaces of the fixed block are provided with a fuel cell female die and a fuel cell male die, and the lower surface of the upper moving slider and the upper surface of the lower moving slider are provided with a fuel cell male die and a fuel cell female die. According to the technical scheme of the invention, a die with one die and one hole and the pressure of a pressing machine are employed, the function of one die and multiple holes is achieved, the multiple requirements of a current industry for the production capacity, precision, consistency and one-time pass rate and the like of a fuse cell electrode board are satisfied, and the mass production of fuel cell boards is facilitated.

The invention relates to a mildew-proof height-adjustable round bamboo walking stick. A fresh small-diameter round bamboo is quickly heated by high-temperature saturated steam for 8-90 minutes, the round bamboo is taken out, an end part of the round bamboo is bent into a handle, and drying is performed. A bottom end of a bamboo rod is processed and then is plugged into a combined connecting piece.A diameter of an opened circular tube is reduced through rotation of an external locking nut so that an innermost telescopic rod is locked to determine a height. A handle end head of the bamboo rod is sealed and external processing and finishing are performed. The small-diameter round bamboo can be used as a novel bamboo walking stick because a bamboo tube can be ensured to have no crack and havedimensional stability during drying after high-temperature saturated steam treatment so that original optimal structural strength of the round bamboo can be maintained, nutrient substances in the bamboo tube are destroyed, and the bamboo walking stick has mildew-proof and mothproof effects. The novel bamboo walking stick uses unlimited bamboo species, is low in production cost, does not add any chemical reagent, and is sustainable circular economy.

The invention discloses a container side wall shock wave damage equivalent target and equivalent experiment method. The equivalent target is a circular plate equivalent target designed based on geometric parameters, material parameters and structural fundamental frequencies of a container structure. The equivalent experiment method comprises the steps of building a deformation mapping relation between a prototype container side wall and the combined equivalent target by an impact dynamic simulation method based on the equivalent target, and then determining deformation of the original side wall by adopting the mapping relation between the prototype container side wall and the combined equivalent target according to shock wave damage deformation of the equivalent target. The shock wave damage combined equivalent target with similar deformation is designed based on the base frequency of the container side wall, the equivalent target is simple in structure and convenient to use, and the experiment cost is reduced.

The invention relates to the field of semiconductor device manufacturing and particularly relates to a power semiconductor device and a manufacturing method of collector regions thereof. The semiconductor device includes a semiconductor substrate or a semiconductor substrate having an n-type buffer layer formed on a back surface of the semiconductor substrate, a first p-type collector region and asecond p-type collector region. The first p-type collector region is formed by injecting boron into the back surface of the semiconductor substrate, and the second p-type collector region is formed by injecting aluminum into the back surface of the semiconductor substrate. From the back surface of the semiconductor substrate, the peak position of the aluminum injection is shallower than the peakposition of the boron injection. The peak concentration of the aluminum injection is higher than the peak concentration of the boron injection. The first p-type collector region is formed through boron injection, and the second p-type collector region is formed through aluminum injection. The carrier concentration of the collector regions can be effectively increased under the condition that the annealing temperature range is not exceeded. As a result, the hole injection efficiency of an IGBT device and the conductivity modulation effect of a drift region are improved. The lower conduction voltage drop and the lower on-state loss are realized.

The present invention relates to a preparation method of a wrinkled fabric. Crescent-shaped composite fibers as wrinkled warp raw materials and crescent-shaped composite fibers and cotton fibers as wrinkled weft raw materials are interwoven into plain weaves, and relaxation heat treatment is performed to prepare the wrinkled fabric; and the twisting directions of the wrinkled warps and the wrinkled wefts are opposite. A preparation process of the crescent-shaped composite fibers comprises the steps of in a process of preparing circular parallel composite fibers from PET and PTT according to anFDY process, changing spinneret orifices in a spinneret plate to be in the crescent shape from the circular shape, performing cooling by cross air blow, and controlling the arrangement of the spinneret orifices to meet a certain condition, thereby preparing the crescent-shaped composite fibers. When the parallel composite fibers are prepared, a PET melt and a PTT melt are distributed and then areextruded from the spinneret orifice m and the spinneret orifice n in the same spinneret plate; the spinneret orifice m and the spinneret orifice n are crescent-shaped spinneret orifices; and the contact surfaces of the PET melt and the PTT melt which flow in guide holes of the corresponding spinneret orifices are parallel to each other. The wrinkled fabric stable in quality and easy to process isprepared by adopting the simple method.