31results about How to "Increase the effective bonding area" patented technology

The invention relates to a bamboo fiber reinforced composite material and a manufacturing method thereof. The bamboo fiber reinforced composite material is formed by directional bamboo fiber felt and an adhesive layer; the upper surface and the lower surface and the thickness direction of the directional bamboo fiber felt are respectively provided with a series of longitudinal cracks which are disconnected uniformly and have nonuniform thickness; the manufacturing method thereof comprises the following steps: longitudinally splitting a section of bamboo tube into two semicircular bamboo tubes along the diameter thereof, removing internal segments, defibering the internal arc surface of the semicircular bamboo tube by a driving roller and a defibering roller, then defibering the external arc surface of the semicircular bamboo tube, then carrying out glue applying, hot-pressing and forming the bamboo fiber reinforced composite material; the series of longitudinal cracks which are disconnected uniformly and have nonuniform thickness are defibered from both the internal arc surface and the external arc surface of the semicircular bamboo tube, simultaneously the bamboo green and bamboo yellow are also removed, therefore, the bamboo fiber reinforced composite material and the manufacturing method thereof increase the effective gluing area of the bamboo material, improve the penetration path of the bamboo materials, lead the strength and hardness of the plywood to be greatly improved and having good processing performance.

The invention discloses a method for three-dimensional jet-printing, forming and casting of a core. The method comprises the comprises the following steps: (1) spreading film covering sand to form a thin layer, and selectively injecting bonding liquid into the film covering sand by using a three-dimensional jet-printing device so that particles in the film covering sand can be bonded with one another to form a first layer; (2) forming a second layer by using the same method in the step (1), repeating the step (1) until a part is formed completely, and standing the part in a powder bed for a period of time so as to obtain an initially formed blank; and (3) heating the initially formed blank at the temperature of 170-220 DEG C until the bonding liquid completely volatilizes, and cross-linking and curing with phenolic resin, so that the casting of the core is finished. According to the method, the method for three-dimensional jet-printing, forming and casting of the core is simplified; the film covering sand can be accumulated layer by layer without drying conditions among layers, so that the fast casting forming of the core is finished; finally, a produced piece is relatively high in intensity, low in cost and high in efficiency; the method can be used for producing the casting core with the large size and a fine structure, and has a wide application prospect.

The invention relates to a steel-aluminum alloy combined structure, and in particular discloses an assembled-type aluminum alloy bridge deck slab-steel girder combined structure and connecting mode. The combined structure comprises an assembled-type aluminum alloy bridge deck slab and a steel girder; the connecting mode comprises an aluminum alloy bridge deck slab-steel girder connecting structure (high-strength bolt connection) and aluminum alloy bridge deck slab connecting construction (a stainless steel screw joint), and the assembled-type connection prevents the reduction of the intensity of an aluminum alloy parent material due to welding. The aluminum alloy bridge deck slab-steel girder combined structure provided by the invention has the advantages that the structure is light in weight, durable, easy to machine, high in toughness, rapid to construct, free from maintenance and the like, can be widely applied to damaged bridge deck modification, bridge building, dangerous bridge modification, pedestrian bridge and emergency engineering, and generates favorable social and economic benefits.

The invention discloses a motor joint for a bullet train bogie and a manufacture method thereof, wherein the motor joint comprises a metal mandrel, a first metal jacket, a second metal jacket, a plurality of metal spacers, and a plurality of elastic rubber layers; the elastic rubber layers are vulcanized to the metal mandrel, the metal spacers and the first metal jacket to form an elastomer that is pressed into the second metal jacket; the metal spacers, the elastic rubber and the first metal jacket are each of double-segment structure; the elastomer is pressed into the second metal jacket to cause pre-compressive stress for the elastic rubber, a first air isolation segment and a second air isolation segment are formed between the two-segment metal spacers and the elastic rubber, the section of each of the first air isolation segment and the second air isolation segment along the radius of the metal mandrel is sector-shaped, the sector section of each air isolation segment is gradually expanded from the metal mandrel to the second metal jacket. The motor joint has improved quality.

Provided is a method for raising the hot pressing bonding rate of a PMMA micro fluidic chip formed by injection moulding. The invention is directed to the field of micro manufacture technology, especially relates to a method for raising the hot pressing bonding quality of a micro fluidic chip. The method is characterized in that carrying out water processing before hot pressing bonding; unlike a traditional hot pressing bonding process flow of from ultrasonic cleaning to drying in a baking oven to hot pressing bonding, a new process flow of from ultrasonic cleaning to water processing to drying the surface with nitrogen to hot pressing bonding is adopted. According to the invention, problems of complex processing method, high cost and negative influence on system operational performance in processing methods such as ultraviolet ray and MMA monomer surface modification and the like are overcome. The processing method is characterized by high efficiency, low cost, unchanged microfluid system performance and simple operation. At a same hot pressing bonding technological parameter, compared to untreated chips, the effective bonding areas of the chips treated with the method provided in the invention substantially increase, the bonding rates averagely increase 20 percent, thereby the bonding quality of the chips is effectively improved.

The invention discloses a composite steel-plastic pressure tube and a manufacturing method thereof, and belongs to the technical field of composite steel-plastic tubes. The composite steel-plastic pressure tube comprises an outer plastic layer, an outer glue layer, an inner glue layer and an inner plastic layer. A steel tube with the rough surface is arranged between the outer glue layer and the inner glue layer. In the manufacturing process of the composite steel-plastic pressure tube, a laser texturing roller carries out rolling and texturing on an adopted steel plate, so that a rough surface is formed on the steel plate, and then the steel plate is processed into steel belts with required widths; the steel belts are rolled to be of tubular shapes under the extrusion state, and an inner plastic layer tube coated with hot melt glue is inserted synchronously; the tungsten electrode argon arc butt welding process is adopted for welding of welding lines, and a steel tube is formed; through a high frequency heater, adhesion of the inner plastic layer tube and the steel tube is achieved; the hot melt glue coats the steel tube, and the outer plastic layer is arranged outside the steel tube. According to the composite steel-plastic pressure tube, the adhesion strength between the outer plastic layer and the steel tube is high, the pressure-bearing capacity is high, and the production cost is low.

The invention relates to a bonding encapsulation structure and method suitable for radio frequency MEMS. The method comprises the steps that organic materials are spin-coated on an encapsulation coverplate and patterned, then Cr and Au are sputtered, and an encapsulation cover plate with the uniformly distributed organic materials and cavities is obtained by using a method that the cavities are etched with a TMHA solution. The cover plate full of the cavities is made from a high-resistance silicon material, and the cavities are obtained through wet etching by using the TMAH solution. By meansof the encapsulation method, the organic materials can be smoothly distributed in a bonding area, the effective bonding area of wafer-level bonding is increased, and then the airtightness, the reliability and other performance of the product obtained after bonding are improved. A low-temperature bonding technology is adopted to conduct low-temperature encapsulation of a radio frequency device, and while good mechanical strength and airtightness are achieved, the requirements for encapsulating the RF MEMS device which is sensitive to temperature are met.

The invention relates to a method for filling and repairing building door and window mounting gaps by using gap filling glue. A device for filling and repairing the building door and window mounting gaps by using the gap filling glue is used and comprises a moving frame, universal wheels, a positioning mechanism, a gap filling mechanism and a blade coating mechanism. The method for filling and repairing the building door and window mounting gaps by using the gap filling glue can solve the problems that in the process of filling and repairing building door and window mounting gaps with the gap filling glue, different height changes of the upper side and the lower side of the door and window mounting position are difficult to adapt, the included angle between the glue outlet position of glue and the door and window mounting gaps is difficult to keep consistent, the extrusion uniformity of the glue at the door and window gap positions is difficult to control, secondary pollution to surrounding wall surfaces is caused by excessive extrusion of the glue, dust removal treatment is more difficult to carry out on the mounting gaps before the glue is filled, and the filled glue is scraped, spread, dried and cooled quickly and the like are solved.

A method of manufacturing solar cells comprises the steps of preparing a photovoltaic conversion substrate, and forming a collector layer and multiple conductive portions on a backlight surface of the photovoltaic conversion substrate, wherein the multiple conductive portions are arranged at intervals in a direction. The collector layer is formed by a screen plating process of a collector layer screen plating plate. The collector layer is equipped with multiple openings at intervals, includes multiple first collector portions that are correspondingly adjacent to the multiple openings respectively, and also includes a second collector portion which is thicker than each first collector portion. Each conductive portion overlaps at least one opening and at least one first collector portion. The collector layer screen plating plate is divided into multiple spaced non-sink-deposit zones used for forming the multiple openings, multiple half-sink-deposit zones used for forming the multiple first collector portions, and a sink-deposit zone used for forming the second collector portion.

The invention discloses a fabrication method of a motor rotor assembly. The fabrication method comprises the steps of firstly, processing an inner hole of annular magnetic steel; secondly, electroplating the annular magnetic steel, attaching electroplating layers onto other surfaces except an inner surface of the annular magnetic steel after being electroplated, and enabling an axial direction of the annular magnetic steel to be in a horizontal direction; thirdly, coating a layer of binding agent on the inner hole of the annular magnetic steel, inserting a cylindrical core shaft into the annular magnetic steel from a first inner hole, and then allowing the cylindrical core to extent out of a second inner hole; fourthly, rotating the annular magnetic steel by 90 degrees so that the axial of the annular magnetic steel is in a vertical direction, and encapsulating a gap between of the second inner hole and the cylindrical core shaft with the binding agent, wherein the second inner hole is arranged above the first inner hole; and finally, maintaining the position of the annular magnetic steel unchanged after the encapsulation of the binding agent is completed, and completing the fabrication of the motor rotor assembly after the binding agent is naturally cured. The fabrication method has the advantages that no noise is generated during the high-speed rotation process, the motor rotor assembly has relatively large twisting force, the annular magnetic steel cannot be separated from the cylindrical core shaft, and the service lifetime of the motor is prolonged.

The invention provides wall anti-seismic mortar, comprising a wall body and a reinforcing mesh, wherein the wall surface of the wall body is uniformly provided with a plurality of holes, the hole diameter is 20-30 mm, the hole spacing is 100-120 mm, the hole depth is 120-180 mm, tie bars with diameter of 4-8 mm are inserted into the holes and are fixed by the mortar poured in the holes, the reinforcing mesh is tied on a wall surface by the tie bars and comprises a plurality of steel bars arranged in an X shape, and the wall surface and the reinforcing mesh are coated with a mortar layer with thickness of 30-80 mm. The wall anti-seismic mortar has strong structural shear capacity and good structure ductility.

The invention discloses a stone dry-hanging installation type fixed keel steel frame for a curtain wall which comprises a framework mechanism; the whole framework mechanism is made of steel materials; a plurality of triangular steel frames are installed on the side of the framework mechanism in a circular array mode; the whole triangular steel frames are arranged in an equilateral triangle mode; an outer ring plate frame is mounted at the front end of the triangular steel frame. The invention relates to the field of building curtain walls. According to the keel steel frame, the end corners of the triangular steel frame and corner grooves are correspondingly installed in an embedded mode, so that when clamping head rods are inserted into the inner sides of rod shrinkage holes, the multiple sets of triangular steel frames are integrally combined and installed in a circular array mode through external fixing bodies, a hexagonal stable structure frame is jointly formed, and large-area stones can be stably supported, fixed and mounted.

The invention provides a medical epidemic prevention eye protection mask. The mask comprises a mask body, fixing lines are arranged on the left side and the right side of the mask body respectively, and fixing strips are installed on the side edges, adjacent to the fixing lines, of the mask body; the mask includes an eye protector, the eye protection comprises an air bag piece and two eye protection pieces which are installed on the air bag piece and made of transparent materials. The fixing strip penetrates through the two eye protection pieces, the eye protection pieces can turn over aroundthe fixing strip, the two eye protection pieces can be opposite to the eyes of a user respectively, an inflation inlet is formed in the air bag piece, a pull wire is arranged on the eye protector, andthe pull wire is used for fixing the eye protection body to the face of the user. The mask can effectively block viruses, and is light in overall weight, high in wearing comfort and high in use convenience.