Cleaning solution and cleaning treatment method for preventing low-hardness pvc injection molded parts from spraying paint

Abstract

The invention provides a cleaning solution capable of preventing a low-hardness PVC injection molded part from paint peeling-off and a cleaning treatment process. The cleaning solution is prepared by mixing a lacquer thinner and alcohol in which the content of ethanol is larger than or equal to 95% at the volume ratio of 1: 3. A face needing to the painted of the low-hardness PVC injection molded part is immersed into the cleaning solution to be wholly soaked for 1-3 seconds, so that oil fouling on the surface of the low-hardness PVC injection molded part is dissolved; then the low-hardness PVC injection molded part is taken out from the cleaning solution and immediately submerged into fresh water to be wholly soaked for at least 4 min, so that the dissolved oil fouling is separated from the surface of the low-hardness PVC injection molded part to emerge from water; the low-hardness PVC injection molded part is taken out and aired to be used for surface painting till the face needing to the painted of the low-hardness PVC injection molded part is clean in fresh water. After the low-hardness PVC injection molded part is subjected to cleaning treatment before painting, a paint sprayed on the surface of the low-hardness PVC injection molded part cannot peel off, so that the product quality of batch production is guaranteed, the labor intensity of workers is greatly reduced, and the long-lasting difficult-to-solve problem that the paint on the surface of the injection molded part peels off in the injection product manufacturing industry is effectively solved.

Description

technical field [0001] The invention relates to the field of spraying of injection molded parts, in particular to a cleaning solution and a cleaning treatment method for preventing low-hardness PVC injection molded parts from being sprayed and peeled off. It can make low-hardness PVC injection molded parts cleaned before spraying, and then spray paint on the surface of low-hardness PVC injection molded parts without paint falling off, which ensures the quality of mass-produced products and greatly reduces the labor intensity of workers , Effectively solve the long-term problem of paint falling off the surface of injection molded parts that has been difficult to solve in the injection molding product manufacturing industry. Background technique [0002] PVC injection molded parts with Shore hardness below 80 are usually called low hardness PVC injection molded parts. Since PVC injection molded parts need to be coated with a release agent on the surface of the injection mold ...

AI Technical Summary

Problems solved by technology

However, the oil stain attached to the surface of the injection molded product is extremely difficult to remove. The current cleaning method is to rinse with water. However, only washing with water cannot remove the oil stain on the surface of the injection molded product. It must be manually wiped during the flushing process.

But the actual situation is that the spray paint quality of low-hardness PVC injection molded parts with a Shore hardness value below 80 has always been difficult to control and guarantee in the painting production process. When the Shore hardness value is below 70, the spray paint will fall off. It has become uncontrollable. Even if manual wiping is carried out during the pre-treatment and flushing process, it is difficult to completely remove these oil stains. The problem of spraying paint on low-hardness PVC injection molded parts has been difficult to solve due to the removal of oil stains, resulting in a high rate of defective products and high production costs for enterprises.

At the same time, due to the need to manually wipe when washing with water, the production efficiency is low, the labor cost is large, and time-consuming and labor-intensive

And workers in the process of rinsing and wiping, contact with water for a long time, will also cause skin diseases, seriously affect the health of workers

In addition, commercially available cleaners are also used to scrub low-hardness PVC injection molded parts, which also cannot remove the oil stains attached to the surface of low-hardness PVC injection molded parts.

Therefore, to prevent the surface of PVC injection molded parts, especially low-hardness PVC injection molded parts from falling off, the degreasing treatment before spraying has always been a problem that has not been effectively solved by the injection molding product manufacturing industry.

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