The heart-shaped can stamping line is a customized automated production line for special-shaped metal cans. It processes tinplate or tin-free steel coils and sheets into two-piece heart-shaped cans and gift cans. The key technical challenges lie in precise forming of special-shaped curved surfaces, application of multi-station progressive dies, as well as crack and deformation prevention during production.
Process Flow
1. Heart-shaped Blanking & Pre-pressing (Initial contour forming)
Adopt servo press and dedicated progressive dies for heart-shaped cans.
- Station 1: Blanking. Punch out heart-shaped blanks and remove burrs.
- Station 2: Pre-pressing & scoring. Pre-form the sharp corners and arcs of the heart shape to disperse stress and avoid cracking
2. Multi-station Deep Drawing
- 1st deep drawing (Shallow cup forming): Form heart-shaped blanks into shallow cups with accurate blank holder force to prevent wrinkling.
- 2nd & 3rd deep drawing (Final forming): Gradually reduce the caliber and increase height to complete the three-dimensional heart-shaped can body.
3. Shaping & Finishing
Correct spring back to ensure symmetrical heart shape and dimensional accuracy.
4. Trimming & Curling
- Trimming: Cut the can mouth to uniform height and eliminate burrs.
- Curling: Roll the can mouth outward into a rounded edge to prevent cuts, facilitate lid fitting and reinforce the can.
