Frozen Mushroom,Frozen Vegetables,Frozen Cauliflower Elites-United Foodstuff Co., Ltd. , http://www.qdiqfvegetables.com
1. Bearings For qualified ball bearings, it is made of high-quality bearing steel. Its inner and outer rings and cages should be bright as a mirror after wiping off rust-proof oil. When touched, they should be glass-like smooth and delicate; the outer ring should be engraved on the end face. There are symbols such as code name, origin and date of manufacture, and they are clearly visible; the rivets between the holders should be evenly riveted, and the rivet heads should not be deflected. Support the inner ring by hand and the outer ring by another hand. The outer ring should be able to rotate quickly and then gradually stop. Mark the outer ring. When each stop, the stop position of the mark should be different. Live inside and outside the ring, so that they do relative movement in the radial and axial, should be no sense of clearance, larger bearings can feel the gap, but there should be no metal impact sound. After completion of the above inspection and decision to purchase, hardness testing may be performed (with the merchant first agreed upon, if the hardness does not meet the requirements of the return): the use of boring knife or hacksaw to cut or scratch the outer ring and inner ring of the bearing should be Gives a "gurgling" sound with no swarf, no scratches or only insignificant fines. If the bearings have signs that are vague, the appearance of dull, shaking there is a gap, the outer ring in the same position rotation, scratches when there are crumbs or scratches, rust stains, etc., indicating that the bearing quality is not qualified, do not buy. 2. The oil seal qualified rubber seal surface should be smooth, no defect deformation, the side of the code, specifications and manufacturers and other signs, the entire circumference of the oil seal on the edge shape, thickness should be consistent, and the fittings when installed, the cutting edge in the journal Should be closely attached; with the framework of the oil seal shape should be correct, the end face is round, with flat glass surface can be no flex; no skeleton oil seal outer edge should be upright, hand to make it deform, loose hands and can restore the original; Springs with oil spring seal should be no corrosion, no deformation, the spring tightly closed in the lip without slack, if the oil seal has irregular shape, defect, elasticity, uneven thickness of the lip, lack of spring corrosion and other phenomena, indicating that the quality is not qualified, Do not buy. 3. The V belt has a smooth V-belt surface and the joints are glued seamlessly. On the outer circumference there are clear logos, specifications, manufacturer's names, etc., and a group of V-belts have the same length. If the appearance of the V belt is rough, the joints are uneven or open, the edges of the joints are exposed, there are no signs or the signs are blurred, and the lengths of the V belts are different, indicating that they are counterfeit products and should not be purchased. 4. Tyre tires on both sides of the tire have a trademark, type, size, number of layers and cord material logo, and clear, eye-catching, and some also printed production number and cover inspection qualified chapter; inner surface of the tire should be smooth and bright, Hand elasticity. If the surface of the tire is incomplete or fuzzy, the inner tube is dull, the carcass is thin and the thickness is uneven, and the hand is inelastic, then it is a defective product. Do not buy it. 5. The appearance of qualified parts of threaded parts shall be smooth, non-corrosive, non-defective, continuous screws, no burrs, and no cracks. The test piece and the standard fittings are screwed together and should be screwed to the terminal, and there is no jamming during the precession process; the rotating connection piece should be free from shaking and impact sound after the rotation. If the screw has defects such as rust, cracks, and burrs, it is a bad product and should not be purchased. 6. The qualified gear packaging of the gear should be intact, the tooth surface and the flower groove surface should be smooth without cutting marks, no burrs, and coated with anti-rust oil or wax. The side of the gear is usually code-named steel code; the broken gear with steel saw blade The work surface should be free of scratches or only fine scratches. If the gear surface has burrs, cuts, rust, crumbs and scratches (dack of hardness) when it is set, the quality is poor and do not buy. 7. V-pulley The qualified V-belt surface is free of air holes and cracks. The V-belt groove is smooth. When the V-belt buckles the V-belt groove, the V-belt is slightly higher than the notch and the bottom of the V-belt is not in contact with the groove bottom. If V-belt is found Grooves have holes and other defects. The shape of the groove surface is not matched with the V-belt. It is a bad part and should not be purchased. 8. The qualified chain of the chain is coated with anti-rust oil, with a certificate of conformity: the connecting plate is smooth, free of burrs and black, and the rivets at both ends of the pin are evenly distributed, and some of the connecting plates are printed with a brand. Put the chain on the glass plate (pin axis is vertical), and slowly raise the middle of the chain with two fingers. When the two ends of the chain begin to leave the glass surface, stop lifting. At this time, the middle of the chain should be less than 10mm from the glass plate. , otherwise explain the gap is too large, do not buy. 9. Piston ring qualified parts surface fine and smooth, no manufacturing defects, no distortion; Good elasticity; With the hacksaw blade breaking the piston ring corners, the ring corners no damage. If the piston ring is inelastic, the surface is rough, and the edges and corners are damaged, it means that the piston ring is of poor quality and should not be purchased. 10. Filter filter filter paper filter pore gap between 0.04 ~ 0.08mm, filter paper arranged in an orderly manner, hard and firm, no deformation after oil absorption; filter core tube with high quality steel, the above mesh size is moderate, obtained From the oil pressure, not easily deformed. If the filter paper is soft and disorderly, the mesh size is not the same, and the filter paper and the upper and lower contact disks are not glued together, indicating poor quality, do not purchase it.