Surface treatment process and advantages and disadvantages of the plastic shell of a multifunctional massager
Common processes for surface treatment of the plastic shell of a multifunctional massager include spray painting, electroplating, silk screen printing, pad printing, hot stamping, laser engraving, etc. The following is a detailed explanation of these surface treatment processes and advantages and disadvantages of the plastic shell of a multifunctional massager.
1. Ordinary spray painting
Principle and process: Use a spray gun to evenly adhere the paint to the plastic shell. Carefully clean the plastic shell in the early stage and properly cover the non-spraying area. Accurately adjust the spray gun air pressure (about 0.3-0.5MPa), spray width (10-30cm) and paint output according to the characteristics of the plastic shell. Operate in a well-ventilated environment with a temperature of 20-25℃, a humidity of 40%-60%, and then dry naturally (24-48 hours) or heat in a drying room (50-80℃, 30-60 minutes).
Advantages: A wide range of colors can be mixed to meet diverse design needs; the cost of equipment and materials is not high, which is conducive to controlling the total cost.
Disadvantages: scratches are easily produced in daily use, and the wear resistance is poor; when exposed to chemicals, the paint is easy to change color and corrode, and the chemical resistance is insufficient.
2. UV spray painting
Principle and process: After ordinary spray painting, the paint is quickly cured with the help of ultraviolet curing equipment. It is necessary to properly adjust the spray gun air pressure (about 0.4-0.6MPa) and other parameters according to the characteristics of the paint, and accurately set the ultraviolet lamp power (80-120W/cm), wavelength (365nm or 405nm), irradiation distance (10-15cm) and time (30-120 seconds).
Advantages: The paint film is hard and smooth, with strong wear resistance; good tolerance to common chemicals; ultraviolet curing is fast, greatly improving production efficiency.
Disadvantages: The purchase and maintenance costs of dedicated UV curing equipment are high; the control requirements for process conditions such as spray paint thickness and ultraviolet irradiation parameters are strict, and incomplete curing or paint film quality problems are prone to occur.
3. Water electroplating
Principle and process: Based on the principle of electrolysis, after pre-treatment of the plastic shell, control of the composition of the electroplating solution and parameters such as current density and time, a metal film is deposited on its surface.
Advantages: It presents a strong metallic texture and gloss, and significantly improves the surface hardness and wear resistance.
Disadvantages: There are hidden dangers of environmental pollution, the process is complicated and the cost is relatively high.
4. Vacuum electroplating
Principle and process: In a vacuum environment, the metal is evaporated and deposited on the surface of the plastic shell, and the deposition rate, film thickness and other parameters are adjusted.
Advantages: The formed metal texture is delicate and uniform, and the environmental protection performance is good.
Disadvantages: It requires huge equipment investment and the production efficiency is relatively low.
5. Silk screen printing
Principle and process: Silk screen printing is performed on the plastic shell by making a silk screen, mixing ink, controlling parameters such as scraper pressure and speed.
Advantages: It can achieve rich and high-precision pattern printing with good cost-effectiveness.
Disadvantages: The printing effect of large-area solid color or gradient color is not ideal, and the pattern deformation and blurring are prone to occur in curved surface printing.
6. Pad printing
Principle and process: Etch the steel plate first, use the silicone head to dip the ink on the steel plate and transfer it to the plastic shell, and control the pressure and contact time of the silicone head.
Advantages: High-precision printing can be achieved, and it has good adaptability to curved surfaces.
Disadvantages: Low production efficiency, high cost of making etched steel plates, special silicone heads and inks.
7. Hot stamping
Principle and process: Use high temperature and high pressure to hot stamp the metal foil on the plastic shell, and set the temperature, pressure, time and other parameters.
Advantages: It presents a high-end and luxurious appearance, and the pattern is durable.
Disadvantages: High cost, difficult to change the design, and poor flexibility.
8. Laser engraving
Principle and process: Use laser beam to engrave on plastic shell, and adjust parameters such as laser power and scanning speed.
Advantages: high engraving accuracy, large degree of freedom, no damage to materials and environmental protection.
Disadvantages: large investment in equipment purchase.
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