8results about How to "Avoid pinholes" patented technology

The invention discloses a medium powder coating for vacuum plating as well as a preparation method and application thereof, and relates to the technical field of coatings. The powder coating disclosed by the invention is prepared from the following components in parts by mass: 100 to 150 parts of isocyanate-terminated polyether modified epoxy resin, 50 to 100 parts of hydroxyl-terminated phenol curing agent, 5 to 15 parts of dicyandiamide curing agent and 4 to 15 parts of auxiliary agent. A coating prepared from the powder coating provided by the invention has the advantages of high gloss, high fullness, high brilliance, high leveling, high corrosion resistance, high mechanical property and the like, meanwhile, the coating hardly has appearance defects such as pinholes, shrinkage cavities and the like, can meet the requirements of PVD vacuum plating dielectric layers, and is particularly suitable for PVD vacuum plating of hubs.

The present invention belongs to the technical field of spraying equipment, and in particular, relates to an anti-corrosion spraying device for the surface of a hardware die-casting product, comprising a workbench, a through hole is provided on one side of the upper end of the workbench, and a fixed tube is rotatably sleeved in the corresponding through hole through a bearing, a hollow placement plate is fixedly connected to the upper end of the fixed tube, and a plurality of negative pressure suction holes are evenly provided on the upper end of the hollow placement plate, a vacuum pump is fixedly installed at the lower end of the workbench, and a suction pipe is fixedly connected to the air inlet of the vacuum pump, and one end of the suction pipe is connected to the lower end of the fixed tube through a rotating sealing joint. The present invention ensures uniform spraying of the anticorrosive agent on the entire workpiece surface, improves the spraying quality, ensures uniform stirring performance of the coating, and avoids the problem of pinhole phenomenon caused by too long stirring time, which may cause air to enter the coating and cannot be well released, and then causes the problem of pinhole phenomenon, and does not require direct manual control, which is convenient to operate.

The utility model discloses temperature control type electroplating equipment, which relates to the technical field of electroplating, and comprises a bottom plate and an electroplating pool, a temperature alarm is arranged on the electroplating pool, a support column is arranged at the top of the bottom plate, a fixed plate is arranged at the top of the support column, the electroplating pool is arranged on the fixed plate, a fixed box is arranged at the bottom of the fixed plate, and a temperature sensor is arranged on the fixed box. The electroplating pool is arranged in the fixing box, a cooling mechanism used for cooling the electroplating pool is arranged at the top of the bottom plate, the cooling mechanism is arranged on the fixing box, a lifting mechanism used for height adjustment is arranged at the top of the fixing plate, and a rotating mechanism used for containing workpieces and rotating circumferentially is arranged on the lifting mechanism. The lifting mechanism comprises two fixing frames, and the fixing frames are fixedly mounted at the top of the fixing plate, so that the electroplating liquid can be conveniently cooled and can be stirred, the electroplating quality is improved, the operation is simple, and the practicability is high.

The invention relates to the field of copper material processing, and discloses a composite copper wire with good wear-resistant and corrosion-resistant effects and a preparation process thereof. According to the composite copper wire with the good wear-resisting and corrosion-resisting effects and the preparation process thereof, through strict control over the electroplating process and the electroplating time in the preparation process, the forming quality of a copper wire surface plating layer is guaranteed, meanwhile, pinholes are completely eradicated in the electroplating process, substantive features are brought to use of a motor stator, and the production cost is reduced. And compared with common electroplating, the plating quality is improved, and the thickness of the obtained plating is more uniform.

The application discloses a high-temperature-resistant silicon-modified epoxy sealing primer, and relates to the technical field of anticorrosive primers. The high-temperature-resistant silicon-modified epoxy sealing primer comprises components A and B in a weight ratio of 88-93:7-12. The component A comprises, by weight, 25-35 parts of modified epoxy resin, 15-18 parts of composite solvent, 55-65 parts of zinc powder, 2-4 parts of graphene paste, 4-6 parts of calcium sulfate, 0.3-0.7 parts of fumed silica, 1.2-1.8 parts of a compounded silane coupling agent and 0.8-1.4 parts of an additive. The component B comprises, by weight, 7-12 parts of a modified curing agent. The modified epoxy resin is obtained by grafting modification of an amino-terminated polyether-isocyanate prepolymer. The modified curing agent is prepared by grafting modification of a polyamide curing agent with HTPB. The modified epoxy resin and the modified curing agent are obtained by grafting modification of an amino-terminated polyether-isocyanate prepolymer, and the modified epoxy resin and the modified curing agent are synergistic. After the siliconization treatment of the compounded silane coupling agent, the high-temperature resistance, the toughness and the interfacial adhesion are significantly improved, and the high stability and the adaptation to complex working conditions are achieved.

The utility model discloses a high accuracy circuit board zinc spraying processing device, including the processing station and setting in the processing station bottom's support box, still include preheating box, the top of preheating box is installed in infrared preheating module in parallel, spray coating box body, spray coating box body sets up the processing station top of preheating box one side, just the top of spray coating box body is installed electric telescopic handle, and the output of electric telescopic handle extends to the inside of spray coating box body and is connected with the top of movable support plate shield, just the movable support plate top of shield inboard evenly installs micro - electric telescopic handle, and the output of every micro - electric telescopic handle all extends to the below of movable support plate and is connected with the spray head. The utility model accurate control micro - electric telescopic handle, drive the spray head adjustment height, ensure that every spray head and the distance of the surface of the circuit board to be processed are consistent. Effectively solved the problem of uneven spraying caused by the uneven surface of the circuit board, improved the spraying quality and precision.

The utility model relates to the technical field of preparation electrolyte membrane, especially a kind of extrusion flat plate coating equipment for preparing solid electrolyte membrane, including equipment main body, equipment main body is equipped with slurry supply unit, extrusion coating unit, gauge control system, multistage drying unit and peeling and winding unit, slurry supply unit is set to one side of extrusion coating unit, the screw pump of slurry supply unit is communicated with the coating die of extrusion coating unit, multistage drying unit is set to the discharge side of extrusion coating unit, the gauge probe of gauge control system is set in multistage drying unit inside, peeling and winding unit is set to the discharge side of multistage drying unit.The utility model can realize the continuous, efficient, stable production of solid electrolyte membrane, the prepared membrane piece uniformity, no defect, high density, and excellent mechanical property.

The utility model provides a Christmas cap making machine which comprises a machine frame, the machine frame is rotationally connected with an unwinding roller used for unwinding a main body cloth roll, the machine frame is connected with an unwinding rod used for unwinding an edge sealing cloth roll, and the machine frame is connected with a guide assembly used for guiding edge sealing cloth to the edge of the main body cloth. An edge welding assembly, a pulling force assembly, a main body welding assembly and a cutting assembly are sequentially arranged on the rack in the conveying direction of the main body cloth, the pulling force assembly is used for pulling the main body cloth to move towards the main body welding assembly, and the main body welding assembly correspondingly welds the two main body cloth; and the cutting assembly cuts the welded main body cloth, so that the problems of complicated operation and low efficiency in the traditional Christmas cap manufacturing process are effectively solved, and the optimization of the production process and the improvement of the efficiency are realized.