Crystal box hot stamping is a common process in 3C packaging. Here's a complete breakdown of the production workflow.

I. Mold Design and Fabrication

** Mold Type **: - Aluminum mold: High precision, long lifespan; ideal for mass production. - Copper mold: Moderate precision, moderate cost. - Plaster mold: Low cost; suitable for small-batch prototyping.

** Mold Design Guidelines **: 1. Account for material shrinkage (PET is approximately 0.4%) 2. Set appropriate draft angles (1-3 degrees) 3. Design vent holes to prevent air bubbles

II. Material Preparation

** Roll Selection **: - Material: PET/PVC/APET - Thickness: 0.2-{3.0} mm - Width: Determined by mold and product - Color: Transparent / Colored / Electroplated

**Material Pre-treatment **: - Drying (PET requires drying at 120°C for 2-4 hours) - Stress relief

III. Hot Press Molding

** Process Parameters **: 1. Heating Temperature: PET approx. 150-180°C 2. Heating Time: Adjust based on thickness 3. Molding Pressure: 0.6-0.8 MPa 4. Cooling Time: 3-5 seconds

**Quality Control**: - Check transparency - Inspect for bubbles and cracks - Dimensional accuracy inspection

4. Trimming

**Punching Process **: 1. Positioning and punching 2. Removing scrap 3. Edge deburring

** precision requirement **: - Dimensional tolerance: ±0.5mm - Smooth edges, no burrs

V. Quality Inspection & Packaging

** Inspection Items for **: - Visual inspection - Dimensional measurement - Fit testing - Drop test (sampled)

The full production cycle is approximately 7–15 days, depending on order volume and process complexity.