According to the National Meteorological Center, in the first half of June 2011, cotton in the Xinjiang, Yellow River Basin and Yangtze River basins were in the fifth true leaf to the bud stage. The photothermal conditions in the northwest, north China and Huanghuai areas are good, which is beneficial to the growth of cotton seedlings. Jianghuai, Jianghan, and central and northern Jiangnan showed two obvious precipitation processes on the 3rd to 6th and 9th to 10th, respectively. The precipitation in the southwestern part of the Yangtze River, the eastern part of Jianghan, and the southern part of the Yangtze River reached 50 mm or more, and 100~ in most areas. 300mm, the drought has been alleviated, and the precipitation is conducive to the growth of cotton, but some areas such as Hunan, Hubei, Jiangxi and other provinces have experienced severe storms and floods, causing some farmland to be flooded. The precipitation in the northwest of Jianghan and the northern part of Jianghuai is less than 10 mm, and the drought continues. Flap Disc
Flap disc, commonly known as flat emery
cloth wheels, emery discs, flower impellers or elastic grinding discs, are a
large variety of coated abrasive conversion products, which press the cut
coated abrasive sheets one by one. It is formed by sticking adhesive to the
back cover plate along the circumference. The flap disc are called strong
elastic grinding discs. They are made of calcined emery cloth, which uses mesh,
nylon, plastic, steel paper and other materials as the base. Attached abrasive
tools, evenly distributed in a fan shape to ensure the best grinding effect.
The particle size is 36#-320#, 60# and 80# are the most common, and the outer diameter
is 4"-7" installed on the angle grinder. Angle grinders are mainly
installed on hand-held Power Tools to polish and polish welds, burrs, chamfers,
surface rust removal, and surface polishing of various metal and non-metal
parts.
The flat emery cloth wheel (flap wheel) is
formed by sticking multiple emery cloth sheets on the tray in a fan-shaped
superimposed arrangement, and the bonding angle between each emery cloth and
the tray plane is 10°-30°. The emery cloth arrangement of the utility model can
make When the abrasive cloth wheel grinds and polishes the workpiece to be
processed, the cutting angle is optimized to ensure that the base material of
the abrasive cloth wheel and the grinding are consumed simultaneously, which
obviously improves the overall wear resistance and grinding efficiency of the
flat abrasive cloth wheel, and prolongs the service life of the abrasive cloth
wheel. Grind the surface of metallic and non-metallic materials.
product advantages:
Compared with the resin grinding wheel for
fixed abrasives, it has the advantages of polishing and polishing at one time,
shortening the operation time, saving the grinding cost, high efficiency, good
heat dissipation, high grinding efficiency, reducing operator fatigue,
increasing machine life, etc. It has strong elasticity, High tensile and
bending strength and good grinding effect. The grinding speed is fast, the
effect is good, and the noise during grinding is low. It is suitable for
various industries or fields of manufacturing such as major metal parts
factories and machinery factories. Good weather resistance, salt spray
resistance and heat resistance, suitable for use in different regions.
Scope of application:
It is suitable for polishing of stainless
steel, metal, metallurgy, automobile, wood, marble and other industries. It is
especially suitable for the processing of stainless steel and can replace the
resin-shaped grinding wheel. It has strong elasticity, high tensile and bending
strength, good self-sharpening, high grinding rate, and low noise. It is
suitable for welding seams in the box. Polishing of the edges.
There are different classifications of
louvers according to different angles. The following are two common
classifications:
According to the appearance: T27 VS T29
Flap disc generally have two shapes, curved
and flat.
The flap disc type is also called the T27
type, and the curved type generally refers to the T29 type.
The flap disc type (T27) has a flat
surface. It is mainly used to polish the flat surface and the external edges
and corners. The flap disc and the workpiece are angled during work, which can
complete the grinding and polishing at one time, reducing the work flow.
The curved surface of the curved louver
(T29) has an upward arc, which makes the T29 flap disc have a better cutting
ability on the plane. When working, the T29 type grinding wheel forms an angle
of 15° to 25° with the grinding surface, which is mainly used to deal with the
grinding of contours and edges. When there are higher requirements for speed
and cutting ability, T29 flap disc is undoubtedly the best choice.
The related abrasive products we can supply is Flap Disc Adhesive, Bonded Abrasives , and Abrasive Machine such as Flap Disc Making Machine,Abrasive Belt Making Machine, Flap Wheel Machine , Polishing Machine ,Sanding Disc Machine, if you have any needs about abrasive tools, please kindly feel free to contact us.
According to the type of abrasive
particles: ceramic alumina VS zirconium corundum VS alumina
According to the type of abrasive selected,
the flap disc can be divided into three types: ceramic alumina, zirconium
corundum and alumina.
Because ceramic alumina itself has many
crystals, it has good self-sharpening, relatively neat edges, good heat dissipation,
and long service life. Therefore, ceramic alumina louvers are mainly used for
the grinding of stainless steel, aluminum and other hard metals.
Zirconium corundum itself is a
polycrystalline crystal, with fast cutting speed, good self-sharpening, and strong
resistance to high pressure and high temperature. Therefore, zirconium corundum
louver blades have strong cutting ability and long service life.
Alumina: single crystal, the cutting ability begins to
decline at the beginning of grinding, and the abrasive grains are not easy to
break, so the alumina flap disc is suitable for the processing of common
metals.
Flap Disc,Flap Disc Machine,flap disk 4.5,Polishing Flap Disc,Sandpaper Flap Wheel Zhengzhou Jiading Abrasive Manufacturing Co.,Ltd , https://www.jd-abrasives.com
It is estimated that in the next 10 days (12-21 days), there will be more rainwater in the middle and lower reaches of the Yangtze River. The main rainfall period will be 12 to 17 days. The total rainfall is generally 40-90 mm, and some areas in the northern part of the Yangtze River are 120-240 mm. Local areas can reach 260-300 mm; precipitation will benefit the growth and development of dryland crops such as cotton; however, rainfall in some areas is too large, and heavy rains in some areas will affect agricultural production. In the next 10 days, the northwestern region, the north China, the Huanghuai wheat harvest area will have fine weather, and there will be more obvious rainfall on the 18th to 21st, and the soil moisture will be improved, which is conducive to summer planting. 
The weather conditions in most cotton areas in early June are favorable for cotton seedling growth
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