1 Scope
This standard specifies the inspection method for appearance defects of special industrial rope belts (including cotton, silk, hemp and chemical fiber rope belts).
This standard is applicable to the identification of the appearance quality of special industrial rope belts.
2 Light conditions during inspection
The light condition during the inspection is normal natural light. When the natural light is insufficient, the light shall be used. The light source is a 40W covered blue normal fluorescent lamp, and the light source is 1~1.2 m away from the inspected finished product.
3 Rope inspection
Observe all the peripheral surfaces of the whole rope and the defects of the rope core by hand in detail. If it is necessary to compare the appearance defects with the standard sample, the two should be placed on the same plane, so that the light source can come from the same direction. There are three operation methods: A, B and C, which can be selected according to the product quality requirements or packaging form.
3.1 Method A
Lead out the rope section by section for careful inspection. 3.2 Method B
Shake the rope into a twisted shape, and repeatedly inspect inside and outside.
3.3 Method C
Carefully inspect the rope while it is being rolled.
4 Tape inspection
Belt inspection shall be carried out in two aspects: bow shape and other defects.
4.1 Inspection of bow defects
Two inspectors are located at both ends of the 3m long inspection table to make the belt move directionally. When an arch is found:
a) Cotton tape and hemp tape: two people shall wipe the tape gently on the inspection table, and the tape is qualified if it is flat on the table, and unqualified if it is uneven.
b) Silk ribbon and silk cotton ribbon: two people pull the ribbon forcibly Put it on the inspection table, press the tape, and smooth the tape by hand (once only). At this time, if the tape is flat on the table surface, it is qualified; if it is uneven, it is unqualified.
c) Synthetic fiber tape: two people put the tape on the inspection table again (if the tape is deformed due to binding and other factors, two people can pull it slightly). If one side of the tape is uneven, push it gently first and then smooth it. If both sides of the tape are uneven, smooth it directly. Use a 1m long ruler to measure the most serious distance of the bow.
4.2 Inspection of strip defects
Lead out the belt section by section and spread it horizontally to visually inspect its front and back. Wear and band edge defects can be inspected in side view. One of the following methods can be selected for specific operation.
a) Single person inspection: the inspector slowly pulls out the front and back of the inspection belt from the front left of the belt placed on the inspection table.
b) Two person inspection: two people sit opposite each other on both ends of the 3m long inspection table, and inspect 1~2 rolls of tape each time. During inspection, one person holds the tape roll, and one person slowly pulls the tape. Two people are responsible for inspecting the front and back of the tape respectively.
c) Mechanical inspection: several rolls of tape are moved on the front and back of the inspection machine, and the inspector is responsible for inspection.
5 Operation requirements
5.1 If defects are found in the inspection process, repair records shall be kept at any time. All the weft density of the belt involved shall be counted as a single layer. Conduct cutting or mark defects according to the quality standards or the provisions agreed by both parties.
5.2 After the inspection, the rope shall be stamped with the inspection job number seal on the appearance inspection card and the tape on the lead paper.
