Engraving machines use cold cut technology to carve line, grid and stipple on slim light box[light box?:light box] light guide panel[light guide panel?:Light guide panel V-cutting machine]. Engraving machine can process high luminance slim light box light guide panel ; however. However it doesn’t have advantage in technology and cost either. And the low process speed restricts its applications in other fields.
The advantages of carving line, grid and stipple by engraving machines:
1. Engraving machine has good luminance. It’s suitable to make high-brightness light guide panel light box.
2. It's unnecessary to make mold. Any graphics[graphics?:graphics pattern], lines, grid and stipple can be easily made and modified for revision at any time.
3. Good stability. Blind spot can be controlled effectively.
The disadvantages of engraving machines to carve line, grid and 3D stipple on light guide panel:
1. Technically demanding. For light guide panel is not absolute flat, engraving machine needs inspection functions to adjust the engraving depth according to the thickness of material. Only few occident countries have such engraving machines.
2 Cost is high. Though the price of engraving machine is lower than laser machine’s, it’s still not cheap, accounting more than US $60000.
3. Low processing speed.
4. Engraving machine can only engrave 3D stipple instead of 3D V cut. Limitations exist in designing some complicated patterns ,such as curved patterns, company's logo, etc .
