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115results about How to "Improve appearance quality" patented technology

Process for filling resin in blind groove of printed circuit board (PCB)

A processing for filling resin in a blind groove of a printed circuit board (PCB) is used for filling resin ink in the blind groove of the PCB. The process comprises the following steps of mesh installation, base plate installation, plate loading, pre-setting, ink addition, alignment film pasting on the PCB, silk-screening to remove air bubbles, blind groove filling, plate baking and resin grinding, wherein during the silk-screening process of the step (7), a double-cutter silk-screening mode is adopted, scrape screening is carried out for 5-8 times, and air in the ink is removed; in the step of (8), the blind groove is filled with the resin from one surface of the blind groove by a silk-screening mode, and during silk-screening process, the double-cutter silk-screening mode is adopted and scrape screening is carried out for one time. During the whole fabrication process, a silk-screening air bubble removal process is introduced, scrape screening is carried out for many times, and air bubbles in the ink are removed; the air bubbles are removed before blind hole filling, thus, the problem that filling is not enough caused by insufficient oil feeding quantity after the blind groove is filled with the resin is prevented; and moreover, the groove is fully filled with the resin ink after the blind groove is filled with the resin, no air bubble is generated in the resin ink at the bottom of the groove after the blind groove is filled with the resin, and the product quality is improved.
Owner:DONGGUAN MEADVILLE CIRCUITS

Intensive flue-curing process for softening and flavoring Yunyan 87 tobacco by flue-curing

The invention relates to the technical field of tobacco conditioning processing, in particular to an intensive flue-curing process for softening and flavoring Yunyan 87 tobacco by flue-curing. By theaid of the process, the proportions of green-containing and impurity-containing tobacco and smooth tobacco can be reduced, so that style, characteristics and potential quality of the 87 variety can beeffectively presented. The process comprises the following steps: tobacco pretreatment; early stage of yellowing: dry-bulb temperature is 35-36 DEG C, wet-bulb temperature is 34-35 DEG C and constant-temperature flue-curing is performed for 6-12 h; middle stage of yellowing: dry-bulb temperature is 38-39 DEG C, wet-bulb temperature is 36-37 DEG C and constant-temperature flue-curing is performedfor 12-30 h; later stage of yellowing: dry-bulb temperature is 41-42 DEG C, wet-bulb temperature is 36-37 DEG C and constant-temperature flue-curing is performed for 12-24 h; early stage of fixation:dry-bulb temperature is 43-44 DEG C, wet-bulb temperature is 36-37 DEG C and constant-temperature flue-curing is performed for 8-16 h; middle stage of fixation: dry-bulb temperature is 47-48 DEG C, wet-bulb temperature is 37-38 DEG C and constant-temperature flue-curing is performed for 20-30 h; later stage of fixation: dry-bulb temperature is 52-54 DEG C, wet-bulb temperature is 38-39 DEG C and constant-temperature flue-curing is performed for 12-24 h; early stage of stem drying: dry-bulb temperature is 59-60 DEG C, wet-bulb temperature is 39-40 DEG C and constant-temperature flue-curing is performed for 4-6 h; later stage of stem drying: dry-bulb temperature is 67-68 DEG C, wet-bulb temperature is 40-42 DEG C and constant-temperature flue-curing is performed for 24-36 h.
Owner:湖北省烟草公司恩施州公司

Method for manufacturing multi-layer thick-copper circuit board

The invention relates to the technical field of multi-layer circuit board manufacturing, in particular to a method for manufacturing a multi-layer thick-copper circuit board. The method comprises steps of rough shape cutting, browning processing, board layout, and pressing. Organic glass cloth prepregs are combined with non-woven prepregs; and the two surfaces of all thick copper boards face the non-woven prepregs. During the pressing process, solidified liquid of the non-woven prepregs flow into copper-free regions of the corresponding thick copper core boards fully, so that the binding forces of the bases of the bottoms of the copper-free regions and the prepregs are strengthened; adhesive filling is carried out fully; hole occurrence is avoided; and potential safety hazards of layeringand board explosion due to heating are prevented effectively. The organic glass cloth prepregs serve as strength supports between the thick copper core plate and the outer copper foils and the adjacent thick copper core plate are combined, so that problems of board surface recession, wrinkling, and sliding and the like are solved; the laminated multi-layer copper board has the uniform thickness; the appearance quality of the laminated board is improved; and the good foundation is laid for follow-up film pasting, electroplating and SMT assembling.
Owner:SHENZHEN KINWONG ELECTRONICS

Different-strength-grade concrete structure of beam-column joint and construction technology of concrete structure

The invention relates to a different-strength-grade concrete structure of a beam-column joint and a construction technology of the concrete structure. The position, no less than 500 mm away from a beam-column connector, of the interior of a beam is determined as a connecting face of high-strength-grade concrete and low-strength-grade concrete, a close-mesh steel wire mesh is hung at the position for isolation, and the steel wire mesh and beam stirrups are firmly bound to ensure that when the concrete is poured, the steel wire mesh is not displaced. In order to prevent the phenomenon that when the high-strength-grade concrete is poured, laitance is retained by penetrating through the bottom of the steel wire mesh, a laitance discharge port is reserved in a bottom formwork of an outer beam of the steel wire mesh; the laitance discharge port is blocked after the laitance of the high-strength-grade concrete is completely discharged before the low-strength-grade concrete is poured. According to the different-strength-grade concrete structure of the beam-column joint and the construction technology of the concrete structure, the construction operation procedures are normalized, shrinkage cracks on the connecting face of the high-strength-grade concrete and the low-strength-grade concrete of the beam-column joint are effectively controlled, and the appearance quality of the concrete is improved.
Owner:HEBEI SCI & ENG CONSTR ENG GRP CO LTD

High-glass-fiber, high-surface-appearance and high-strength nylon 6 composite material and preparation method thereof

The invention discloses a high-glass-fiber, high-surface-appearance and high-strength enhanced nylon 6 material. The high-glass-fiber, high-surface-appearance and high-strength enhanced nylon 6 material is prepared from the following components in percentage by weight: 25 percent to 60 percent of nylon 6, 40 percent to 65 percent of glass fibers and 1 percent to 25 percent of a surfactant PA6I. The invention further discloses specific steps for preparing the material: taking all materials except the glass fibers according to the component ratio; after uniformly mixing the materials at a high speed, carrying out melting extrusion on the mixed materials and the glass fibers, which are laterally fed, through a double-screw extruder; dicing through a granulator; drying generated grains in a drying oven and carrying out injection molding to obtain the high-glass-fiber, high-surface-appearance and high-strength enhanced nylon 6 material, wherein the temperature of the extruder is 250 DEG C to 290 DEG C. The high-glass-fiber, high-surface-appearance and high-strength enhanced nylon 6 material has the beneficial effects that the defect that traditional high-filling glass fiber enhanced nylon 6 has poor surface appearance is overcome by the high-strength and high-apparent-quality glass fiber enhanced nylon 6 material.
Owner:5ELEM HI TECH CORP

Tobacco leaf modulation method suitable for air source heat pump dense baking room

The invention discloses a tobacco leaf modulation method suitable for an air source heat pump dense baking room. According to the method, multi-stage precise baking is carried out, and modulation is performed by controlling the temperatures of dry and wet balls and the rotating speeds of fans in each stage, and observing the change condition of the tobacco leaves in each stage. Compared with a traditional three-section flue-cured tobacco method, the method has the advantages that four stages are added, the temperature and humidity points are definite in each stage, and the method is simple andflexible to operate; compared with a three-section flue-cured tobacco method, the method has the advantages that the baking cost is reduced by 0.17 yuan per kilogram of dry tobacco leaves, the cost of tobacco leaves is reduced by 84.32 yuan in each furnace, the appearance quality of the tobacco leaves after baking is obviously improved, and the ratio of the middle-grade and high-grade tobacco leaves is high; and in addition, by using the method, a high-speed circulating fan is only used at a color fixing period, and a low-speed fan is used in other periods, so that the power consumption is greatly reduced, the electricity consumption cost is lowered, and the baking cost is saved.
Owner:YUNNAN ACAD OF TOBACCO AGRI SCI

Frame for display equipment and manufacturing method of frame

The invention discloses a frame for display equipment. The frame comprises a frame body with the cross section of a U structure, and the two ends of the frame body are bent by 90 degrees to form a top frame and two side frames; first notches and second notches are formed in the inner sides of the bent parts between the top frame and the side frames, and the first notches and the second notches correspond to each other vertically in the height direction of the bending lines of the bent parts. The frame is integrally formed and is high in structural strength; dust can be effectively prevented from entering the display equipment from the frame, and the appearance quality of the display equipment can be improved. The invention further discloses a manufacturing method of the frame for the display equipment. The manufacturing method comprises the steps that a U groove profile is prepared or selected; the U groove profile is cut to obtain the frame body; the to-be-bent parts of the frame body are cut to form the first notches and the second notches; the frame body is bent by 90 degrees to obtain the frame with one top frame and two side frames being in butt joint in a bent mode. By means of the manufacturing method, the manufacturing difficulty is lowered, the manufacturing cost is low, and processing is easy.
Owner:洪鸿莎

Closing structure for flat tube of condenser of automobile air-conditioner

The invention provides a closing structure for a flat tube of a condenser of an automobile air-conditioner, in order to solve the problems of a present flat tube structure that the inserting and positioning are difficult, the correcting for the center distance of collecting mains is required before brazing, the invariableness cannot be ensured during a brazing process after the correcting, the appearance effect is inferior, and the like, during a core manufacturing process. A joint of an end of the flat tube and the collecting main is arranged in a wedge form, namely, the size of an outer edge on one side of the port of the end of the flat tube is smaller than the size of an inner edge of an assembling hole of the collecting main, and then, is linearly increased to be consistent with the size of the outer edge of a tube body, so that a wedge-shaped transitional zone is formed between the tube body of the flat tube and the port. The closing structure provided by the invention has the beneficial effects that the flat tube can be conveniently inserted into the assembling hole on the collecting main and can be accurately positioned, the center distance between the collecting mains at two ends meets a design demand, and meanwhile, the welding reliability (zero leakage) is ensured. Besides, after the welding is finished, no closing trace of the flat tube can be seen and the appearance quality is increased.
Owner:CHONGQING CHAOLI HI TECH

Three-dimensional concave-convex grain printing process

The invention relates to a three-dimensional concave-convex grain printing process, which comprises the following steps that S1, according to requirements, a three-dimensional concave-convex grain drawing file is designed; S2, a first flexographic plate and a second flexographic plate corresponding to the three-dimensional concave-convex grain drawing file are output through automatic plate discharging equipment; S3, the first flexographic plate is pasted on a first hard plate for forming a production mother plate; S4, the second flexographic plate is pasted on a second hard plate for forming a production bottom plate; S5, three-dimensional concave-convex grain semi-finished products are produced by utilizing the production mother plate through a UV (ultraviolet) transfer printing process; S6, the three-dimensional concave-convex grain semi-finished products are pasted and fixed with the production bottom plate, and colors are printed on the three-dimensional concave-convex grain semi-finished products; S7, processing forming is carried out, and finished products are formed. The three-dimensional concave-convex grain printing process has the advantages that a better printing effect can be achieved, and the appearance quality of the three-dimensional concave-convex grains is improved.
Owner:CYMMETRIK SHENZHEN PRINTING

Drying device for Chinese herbal pieces

The invention discloses a drying device for Chinese herbal pieces. The drying device for Chinese herbal pieces comprises a base and a drying box. A plurality of iron blocks are arranged on the upper side of the base. Springs are arranged on the upper sides of the iron blocks. The upper ends of the springs are connected with electromagnets. A supporting platform is arranged on the upper sides of the electromagnets. Supporting columns are bilaterally arranged on the upper side of the supporting platform. The drying box is arranged at the upper ends of the supporting columns. A screen cylinder isarranged in the drying box. The left end of the screen cylinder is connected with the drying box through a rotary shaft. A driving shaft is arranged at the right end of the screen cylinder. A positioning device is arranged at the right end of the drying box. A motor is arranged at the right end of the positioning device. The right end of the driving shaft is connected with the output end of the motor. The positioning device comprises a positioning sleeve. Bearings used for reducing vibration generated by the driving shaft are arranged in the positioning sleeve and arranged on the driving shaft in a sleeving mode. An air inlet and an air outlet are bilaterally formed in the middle of the positioning sleeve. The drying device for Chinese herbal pieces is simple in structure, convenient to use, high in processing quality, long in service life, capable of saving energy, and environmentally friendly.
Owner:纪美

Light-emitting sign with light-transmitting function and manufacturing method of light-emitting signboard

The invention discloses a light-emitting sign with a light-transmitting function and a manufacturing method thereof, belongs to the technical field of vehicle lamp illumination, and particularly relates to a light-emitting sign and a manufacturing method thereof. The light-emitting sign comprises a mask set, a diffusion plate, an optical system, a wire harness and a shell, and the mask set is detachably connected with the shell; the interior of the mask set and the interior of the shell jointly form a containing cavity, the optical system is arranged in the containing cavity, the wire harnessextends from the exterior of the shell to the containing cavity, and the wire harness is electrically connected with the optical system. The mask set comprises a light-transmitting component and a shading component. The light-transmitting part is coated with a nanoscale metal plating layer; the nanoscale metal coating is achieved through a PVD vacuum sputtering coating method, and the light transmittance is controlled to range from 10% to 20% by adjusting the thickness of the nanoscale metal coating. The light effect that the electroplated appearance label can be lightened after being electrified is achieved, and particularly when a white light source is adopted in an optical system of the device, the lightened light effect of the light-emitting label device still emits white light and hasno chromatic aberration phenomenon.
Owner:长春星瑞技术服务有限公司
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