After the bicycle coating is off the assembly line, how to solve the coating defects found in the quality inspection?

In China, a bicycle is not just an object, it is closely connected with the memories of generations.

Current status of the bicycle market

Bicycle is one of the means of transportation for people to travel, and it is environmentally friendly.

As a major bicycle manufacturing country, China has become the world's largest bicycle manufacturing base.

According to the data disclosed on the official website of the China Bicycle Association, from January to June 2021, the operating income of bicycle manufacturers above designated size was 104.

Bicycle frame painting

As the main component of the bicycle, the main function of the frame is to withstand the impact load when the bicycle is in the driving state.

Bicycle frame materials are mainly aluminum alloy, steel, carbon fiber, magnesium alloy, titanium, etc.

In the past, the coating of bicycles was mainly based on traditional solvent-based coatings, which may cause different pollution to the water environment and the air environment during the coating process

Powder coating coating: The advantages of powder coating are no VOC emissions, good physical and chemical properties, recyclability, high coating utilization, and good adhesion to aluminum alloy materials

Water-based paint coating: water-based paint has good environmental protection, low VOC, good corrosion resistance, conventional coating performance and transportation safety, and good gloss and color retention

Bicycle frame painting defects

During the coating process of bicycle frames, often due to lack of on-site control, improper operation specifications, poor equipment operation, improper use of materials, and the impact of the coating environment, the coating process is abnormal, resulting in various defects in the coating quality.
It severely affected the first pass rate and product quality.
It can be said that it affects the cost and quality at a closer point, and it may have an unpredictable impact on product quality and brand image if it is farther away
.

Leakage problem:

The problem of missing spray, that is, the coating is not in place, that is, the bottom is exposed.
The main manifestation is that the coating is poorly covered and thin or uncoated, and the bottom layer of the workpiece surface can be seen.
This situation is common in spray construction
.
This is because the frame is relatively slender, and the structure has more corners, and these corners can easily become areas of spray leakage
.

Orange peel appears:

Orange peel phenomenon is still relatively common in bicycle frame painting.
The reasons are the paint construction configuration and improper construction operation.
If the coating is too thick or the baking temperature is too fast, it will cause obvious orange peel
.
Poor leveling of the coating itself is also one of the influencing factors
.

Particle problems:

The pollution of the construction environment during the spraying process can also cause particle problems.
For example, dust and dust in the coating space can cause particle hazards, impurity particles falling into the equipment, or lint and silk thread entangled in the equipment
.
In addition, when powder coating, impurities in the powder can also cause particles
.

Coating repair of bicycle frame

Many of the surface coating defects after the bicycle frame is painted off the assembly line are only partial damage.
Once the quality inspection finds the problem, the coating repair can be carried out on-site in time to completely avoid subsequent losses
.

At present, many companies have given a brand-new solution for the partial repair of the surface coating of the bicycle frame
.
For example:

Coating repair program painted with water-based paint: water-based paint uses water as a diluent and does not contain toxic and harmful substances such as formaldehyde, heavy metals, benzene, etc.
It can be dissolved in water after spraying, and can provide high-quality anti-corrosion effects after being completely dried.
No peculiar smell
.
After finishing the pretreatment of the coating defect location, spraying on the DECEM water-based self-spraying paint can achieve an excellent coating repair effect
.

Coating repair program painted with powder coating: powder coating has good environmental protection, excellent adaptability to powder coating, good adhesion, can reach above level 1, rich in color, flat, high-gloss, orange pattern, sand pattern, etc.
Can be customized options
.