Stainless steel color coated coil production process need to
2020-08-06 10:46
Stainless steel color coated coil production process need to pay attention to the problem
Stainless steel color coated coil is now often used materials, but it is also easy to have some problems, its common quality problems characteristics and reasons for occurrence detailed:
1、Bending sex is not good (T bend)
Features.
Stainless steel color coated coil bending 180 degrees test, processing parts of the coating cracking and coating peeling.
Causes of occurrence.
1, the amount of pre-treatment mastery is too much.
2, the coating thickness is too thick.
3, excessive baking.
4、Different manufacturers of undercoat and overcoat, or improper use of thin material.
2、Bad hardness (pencil hardness)
Features.
Use a drawing pencil to scratch hard on the surface of the coating, and leave a scratch on the surface after wiping away.
Occurrence reasons.
1、Low furnace temperature, coating curing is not sufficient.
2、Improper heating conditions.
3、The thickness of the coating is thicker than the specified.
3、Bump
Features.
Due to the external impact of the steel strip, the surface of the stainless steel color coated coil appears protruding or depressed, some with some spacing, some without.
Occurrence causes.
1、There are foreign objects mixed in the roll when painting.
2, thin plate products in the bundle of tie marks.
3、The external impact when rewinding.
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