<p>It can be widely used to clean printed boards, glass products, steel plates, aluminum plates and other panels. The sponge roller has many micropores, and the micropores are connected to each other, and the water absorption is very good. For oily substances, since the oil is an organic compound, when it penetrates into the sponge roller hole, it forms a closed state. It cannot absorb the grease better. The oil absorption is not good. The ink is dyed in the water, and the printing machine depends on water. The penetrating and flowing performance of the ink drives the dyes of the ink, and the poor penetrating performance of the dyes is left on the paper. The moisture is transparent and colorless, leaving only the dye marks. The paper just printed is moist.</p>

<p>Polyurethane rubber has a wide range of hardness, as low as low modulus rubber below Shore A10, and high impact elastic material as high as Shore D85. Its elastic modulus can be as high as hundreds of megapascals, which greatly exceeds others. The elastic modulus of rubber is in the range (approximately 0.2-10 MPa), so polyurethane rubber has a wide range of properties and is a type of polymer material ranging from rubber to plastic. It is also precisely because of polyurethane's outstanding characteristics of wear resistance, oil resistance, aging resistance, low temperature resistance, high hardness, and high elasticity. In recent years, the amount of polyurethane has increased rapidly, and the scope of application has continued to expand. It is widely used in petrochemical, mining machinery, and light industry. Machinery, water conservancy engineering, transportation and shoemaking, papermaking, electromechanical and other industries have replaced and saved a large amount of wood, steel and various rare metals. However, the existing polyurethane rubber rollers are not ideal for use in some special environments. Especially when used for a long time and under high speed conditions, its high temperature resistance, friction resistance, and corrosion resistance performance will be significantly reduced. For example, the polyurethane parts used in foreign high-speed cigarette equipment imported from our country have to run for a long time under the condition of high speed, and the wear of the parts is more serious. The use time is only 20 to 35 days, which not only affects production efficiency, but also has zero The components are all imported, so the running cost is higher</p> <p>The purpose of the present invention is to provide a polyurethane rubber roller with superior performance in terms of wear resistance, corrosion resistance and high temperature resistance. </p> <p>Compared with the prior art, the present invention has the following advantages and effects. By adopting the above scheme, the formulated polyurethane product has extraordinary wear resistance, high temperature resistance, corrosion resistance, aging resistance and other properties, and its wear resistance is natural rubber The comprehensive performance of its products is 10 times that of rubber products, and the price is only 1-2 times that of general rubber, especially the polyurethane rubber roller formulated with the above formula, in the working environment of high speed and spraying industrial glycerin , There is no change after three months of use. However, the existing ordinary polyurethane rubber rollers cannot be used due to foaming or severe abrasion in less than one month. Its comprehensive performance is also superior to similar foreign products, and the cost is low. It is an ideal product that can completely replace imports. </p>

<p>Component welding: group welding of inner plate, shaft head, bushing, blocking plate, inner tube, etc., the inner tube is statically balanced within 50g, the inner tube is drawn with a spiral line, and the flat steel runner is welded. </p> <p>Car distribution, installation, welding: distribution of car inner tube, size and outer tube interference 0.4mm, two-plate back welding angle of 15X30 degrees, grinding inner tube, cleaning slag, inspecting inner tube size and outer tube inner diameter size Whether it is suitable, the heating sleeve is in place, and the whole assembly is welded after cooling and shrinking. (Note: 45# steel is heated before welding and heat preservation after welding). </p> <p>Annealing, rough turning, quenching: annealing heat treatment, process quenching and tempering, multiple stress relief, leave allowance for rough turning, static balance, greater than 50g, need to calculate the amount of bias, and borrow on the lathe. </p> <p>Quenching: The surface hardness should be HRC58&deg;&mdash;60&deg;, and the roller surface has no tortoise cracks. Fine turning and rough grinding: two-axis heads repair the pin hole, two-axis heads to the roller surface runout <0.05, according to the requirements of the drawing to process the length to the size, and the outer circle is left with a margin, 0.5&mdash;0.6. The grinding support circle is used as the bracket position. According to the requirements of the figure, the grinding roller surface size, Ra0.5 two shaft heads to the roller surface runout <0.02. </p> <p>Dynamic balance, electroplating, fine grinding: Do dynamic balance G40, plug the vent, do pressure test without leakage, do water pressure smooth test. Hard chromium electroplating, 0.15 chromium layer on one side is uniform without pinholes, shedding and other defects. The two shaft heads are precisely ground, and the two bearing blocks are opposite to the roll surface run-out <0.01 roughness 0.8. The gears of the remaining shaft heads are ground to the tolerance range. </p> <p>Frosted and finely polished mirror surface: Use a disc grinder to grind the surface of the roller to inspect the surface of the roller without water ripples, spirals, pinholes, flies and other defects. On the polishing machine, the surface of the roller is polished to a roughness of Ra0.01&mdash;0.005 (the finish is up to 14) to achieve a super mirror surface. Hardness HRC62&deg; after chrome plating and polishing. </p> <p>Hollow welded quenching rollers require high hardness and narrow soft belt requirements. In the actual processing process, they are affected by the heat treatment tempering temperature and welding preheating temperature, which makes it difficult to guarantee the final hardness; in addition, the roller sleeve material is 45# steel. In addition to quenching and welding, the width of the soft belt must be ensured, which increases the process difficulty between hot and cold processing and welding. </p>