36results about How to "Avoid easy delamination" patented technology

The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and a method of forming the same. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.

The invention discloses a white printing paste, its preparation method and application. The white printing slurry is 1-20 parts of white pigment by weight, 2-5 parts of thickener, 5-30 parts of binder, 0.1-2 parts of dispersant and 43-91.9 parts of deionized water; Add dispersant and white pigment to deionized water, shake to disperse the pigment evenly; then add thickener and binder and stir to make white printing paste; then pass the white printing paste through the screen printing machine to print evenly The base fabric is prebaked and then baked, and the snow camouflage protective fabric is prepared through standard water washing. The printing process of the invention is simple and the process is short, and the printed fabric not only has the functions of snow camouflage and ultraviolet protection, but also has good wearing performance.

The invention discloses a low-temperature laminated steel plate coating glue, which comprises the following raw material components in terms of mass parts: 20-40 parts of high-molecular saturated polyester resin, 5-10 parts of medium-molecular saturated polyester resin, 2-5 parts of hydroxyl-terminated liquid nitrile rubber, 5-10 parts of blocked isocyanate curing agent, 0.5-1 part of catalyst and 50-60 parts of solvent, which can be laminated at a low temperature of 160 ° C and have good resistance Heat, to overcome the deficiencies in the prior art. The present invention further proposes a preparation method of the above-mentioned steel plate coating adhesive, which can effectively reduce the loss of heat resistance of the hot melt adhesive in the preparation process, and also proposes a hot melt adhesive film using the above steel plate coating adhesive, which can effectively Avoid delamination of hot melt adhesive film and steel plate.

The invention discloses a manufacturing method of a circuit board with a step groove. The manufacturing method includes the following steps that: an isolation cage is manufactured, and the isolation cage is pasted at a step groove position of the surface of an inner-layer board; an outer-layer board is fittingly pressed on the inner-layer board, and a through hole is formed at a step groove position of the outer-layer board in advance, and after being fittingly pressed, the isolation cage can be located in the through hole; and the isolation cage is taken out from the through hole, so that a step groove can be formed. According to the technical scheme of the invention, the isolation cage is adopted to directly from the step groove without a deep milling control step required, and therefore, techniques are simple; and gaskets are not adopted, and therefore, problems of being difficult to remove the gaskets and gasket residuals can be solved, and the problem of high possibility of delamination caused by the gaskets can be also solved.

The invention belongs to the field of spray head configuration or installation, and particularly discloses a rotary multilayer paint spraying device. The rotary multilayer paint spraying device comprises an air pump, a fixed base, a top-sealed rotary drum and a sealed outer shell. A rotating shaft is connected to the fixed base through threads, the rotating shaft is rotationally connected to the two side walls of the outer shell, and the rotating shaft is provided with a fixture, a power gear and blades. The blades are located in the outer shell. An air inlet pipe is arranged on the outer shell, and an air outlet hole is formed in the outer shell. A gear ring and a spray gun are arranged on the inner wall of the rotary drum. A planetary gear is rotationally connected to the fixed base and located between a power gear and the gear ring, and the planetary gear, the power gear and the gear ring are mutually cooperated. An exhaust hole is formed in the center of the bottom of the rotary drum, one end of the air inlet pipe is connected to the output end of the air pump, the input end of the air pump is connected with the exhaust hole, and the tooth width of the power gear is larger than the tooth width of the planetary gear. The mist paint in the rotary drum is discharged out of the rotary drum through the air pump, and the situation that when entering the rotary drum, a worker inhales the mist paint, and the health of the worker is jeopardized is avoided.

The invention discloses a manufacturing method of a step-type circuit board. The manufacturing method comprises the following steps: a first area where a circuit pattern needs to be formed in a step-slot range on an inner-layer board is electrically plated and thickened by at least 100 micrometers; an inner-layer line pattern is machined on the surface of the inner-layer board, wherein a first line pattern is formed in the first area in the step-slot range; an outer-layer board is arranged on an upper layer of the inner-layer board, and an outer-layer line pattern is machined in a surface of the outer-layer board; a step slot with the bottom reaching the first line pattern is machined in step-slot range of the outer-layer board in a depth milling control process. Due to the fact that gaskets do not need to be used in the technical scheme, the problems that the gaskets cannot be removed easily and are left can be avoided, and the problem that layering is likely to occur due to the gaskets can be also avoided; additionally, when multiple step slots need to the machined, all that is needed is to laminate the inner-layer board and the outer-layer board to reach a needed number of layers once and then machine the step slots in the outer-layer board in the depth milling control process, and the problem that layering is likely to occur due to multiple times of lamination can be avoided.

The invention discloses a system for preparing bio-oil and activated carbon by microwave pyrolysis. The system comprises a microwave pyrolysis reactor, a cyclone separator, a condenser, a coke storage bin, a microwave activation reactor, a gas burner, an activated carbon cooling tower and a nitrogen generator, wherein the microwave pyrolysis reactor is connected with the cyclone separator through a pipeline; a gas outlet in the top of the cyclone separator is connected with the condenser; the bottom of the cyclone separator is connected with the coke storage bin; the bottom of the coke storage bin is connected with a material inlet of the microwave activation reactor; a material outlet of the microwave activation reactor is connected with a feed opening of the activated carbon cooling tower through a pipeline; a gas outlet of the microwave activation reactor is connected with a feed pipeline of the gas burner through a pipeline; a gas outlet of the condenser is connected with the gas burner through a pipeline; a gas outlet pipeline of the gas burner is divided into two paths, wherein one path is connected with the microwave activation reactor, and the other path is connected with a fluidizing gas and spouting gas pipeline of the microwave pyrolysis reactor; a gas inlet of the activated carbon cooling tower is connected with a nitrogen pipeline; a gas outlet of the activated carbon cooling tower is merged into the fluidizing gas and spouting gas pipeline through a pipeline; a material outlet is formed in the bottom of the activated carbon cooling tower. The system is high in biomass pyrolysis rate, can obtain high-yield bio-oil and high-quality activated carbon products, and has a favorable application prospect.

The invention provides a modified graphene-containing tungsten carbide spray powder for preparing a self-lubricating wear-resistant coating, which comprises the following steps: 1) weighing a certain amount of modified graphene / nano-tungsten carbide composite material. Mix with a certain amount of absolute ethanol, and obtain a mixed solution of graphene / nano-tungsten carbide composite material after ultrasonic dispersion. 2) Weigh a certain amount of tungsten carbide / cobalt spray powder and add it into the mixed solution of graphene nano-tungsten carbide composite material. 3) The tungsten carbide / cobalt spray powder compounded with modified graphene was obtained by vacuum freeze-drying. 4) A tungsten carbide / cobalt self-lubricating wear-resistant coating compounded with modified graphene was prepared on the surface of the cleaned and sandblasted parts by thermal spraying process. The invention not only retains the layered single-layer carbonaceous structural characteristics of graphene, but also increases the specific gravity of graphene by the grown nano-carbide particles. In addition, the freeze-drying method can avoid the loss of graphene caused by ball milling or other powder mixing processes. .

The invention relates to a high-thermal-conductivity graphite-high silicon aluminium-based composite material and a preparation process for the same. The composite material is composed of, in volume fraction, 10-70% of graphite, 5-30% of silicon, and the balance of aluminium or aluminium alloy. The preparation process comprises the following steps of: (1) uniformly mixing graphite powder and silicon powder to obtain mixed powder; (2) placing the mixed powder in a heat treatment furnace, and performing vacuum hot-pressing sintering to form a precast block; (3) placing the sintered precast block in a die and preheating, and heating aluminium or aluminium alloy in a crucible until aluminium or aluminium alloy is melted; (4) pouring an aluminium melt or aluminium alloy melt in the die; (5) applying an axial pressure by a hydraulic machine, and enabling the aluminium melt or aluminium alloy melt to infiltrate in pores in the precast block; and (6) cooling and releasing the die, and taking out the composite material. Compared with the prior art, the composite material obtained by the preparation process disclosed by the invention is low in density and cost, and has the characteristics of low expansibility, high thermal conductivity and the like simultaneously.

The present application proposes a rotor blade integrally formed from a three-dimensional woven composite material and a manufacturing method thereof. The rotor blade integrally formed from a three-dimensional woven composite material includes: a root connector, and the root connector is provided with a tow connection hole and a paddle body, the paddle body comprising a three-dimensional woven composite material woven from tows, the paddle body being connected to the tow by passing at least part of the tows through the tow connecting holes The above-mentioned root connector.