What are the causes of wear and tear of rolling bearing of injection molding machine?
(1) normal wear of rolling bearings rolling bearing working stability under the condition of normal wear and tear, is due to manufacturing bearing alloy steel in extrusion and high speed rolling condition, the metal surface to produce small fatigue crack, the crack in the role of long-term extrusion, again a little bit, until it falls off a small piece of metal, forming a small pit, with the increase of working time, the number of hemp pit also increase gradually, make the smooth surface of the bearing damage, the rotation of the bearing noise increases, until the last can't work.
(2) the rolling bearings of rolling bearing is incorrect after installing, because there is no set aside axial travelmotion of rolling bearing, is a rolling bearing is different from the shaft after installation or heart, caused by seizing and speed up the rolling bearings of rolling bearing wear.
(3) rolling bearing and the bad lubrication condition at work because of the high speed rotating bearing lubricating oil supply, or no lubricating oil supply for a long time, the dry friction caused by rolling bearing between different parts and shorten the life of the rolling bearing.
(4)The lubricants of rolling bearings are impure and mixed with metal powder impurities between the parts of rolling bearings, thus aggravating the wear of rolling bearings.
(5)Losses of rolling bearings in injection molding machines are caused by the failure of materials to be well plasticized due to the low temperature in the cylinder.The other is because the raw materials are mixed with hard metal blocks and so on into the cylinder.Both conditions can make great resistance produced by the rotation of rotation of the screw, the screw force moves the raw material to produce large axial force make the screw at the back of the thrust bearing force beyond the bearing capacity limit load and destruction.The other cause of bearing damage is: the bearing assembly method is not correct, when assembling the bearing, hit the bearing jacket with a heavy hammer;Or when the pressure is assembled, the bearing capacity of the bearing jacket and the force of the shaft and the bearing are different from each other.