What is the quality standard of sandwich panels?

A. appearance quality requirements

1. board: flat surface, uniform color, no obvious bump, warpage, deformation.

2. surface: clean surface, no glue marks and oil stain.

3. defects: apart from crimping and cutting edges, there are no obvious scratches, bumps, scars, etc.

4. incision: straight cut, no sharp edges on the edge of the plate, degumming and wavy, and the panels should be bent inside.

5. core material: the core plate should be neat, no big pieces spalling, and there is no obvious gap between the block and the block.

B. Size tolerance of sandwich panels

1. length: tolerance deviation ±3~5mm

2. width: tolerance deviation±2mm

3. thickness: tolerance deviation ±2mm

4. diagonal deviation: allowable deviation ≤6