English
The manufacturing process of acrylic light guide plate is mainly divided into two types: printing type and non-printing type.
a. Printed
The printed light guide plate is made of screen printing light guide ink. Light-guiding ink has the function of refracting and highly reflecting light, which can change the direction of side incident light into flat light.
Advantages: less equipment investment, simple operation, high mobility and low cost.
Disadvantages: The uniformity of structure, ink viscosity, and stencil tension are not easy to control, requiring a lot of manpower, and the product quality rate is relatively low.
b. Non-printing
The manufacturing process of non-printing light guide plate is divided into direct injection molding, chemical etching, laser engraving, and V-cutting technology.
① Direct injection molding: According to the size and thickness of the backlight product, the dots are designed on the injection mold, and then the PMMA rubber particles are hot-melted through the injection molding machine and directly injected into the light guide plate.
②Chemical etching: According to the size of the backlight product, the dots are first made into molds, and then the molds are combined with the optical grade acrylic board and the optical grade acrylic board is etched by chemical methods to generate dots.
③Laser engraving: Use a laser engraving machine to engrave line grooves or concave hole lattices on the surface of optical grade acrylic sheets. The line groove or concave hole lattice can refract the side incident light into plane light.
④V-cuttingTechnology: With the cooperation of CNC machine tools, advanced industrial diamonds are used to destroy the surface of optical-grade acrylic sheets to form V-shaped grooves, which can be adjusted according to the thickness of the light guide plate.
Advantages: The structure is more miniaturized and precise, the quality uniformity is better, the cost can be greatly reduced when the production capacity is high, the product yield rate is high, the material cost can be reduced, and the optical quality is easier to maintain.
Disadvantages: high investment in equipment, strong mold specificity, cannot be used universally or adjusted, high cost of mold opening, high cost when the amount is small, and difficult to master the production process.
