Core Selling Points
■ Precision matched die components for consistent forming
■ Hardened and ground for long production life
■ Interchangeable inserts for size and profile changes
■ Optimized forming geometry prevents material cracking
■ Compatible with rotary and linear forming machines
■ Quick setup and adjustment features
■ Standard sizes available from stock
■ Custom profiles developed from your samples
Technical Specifications
|
Parameter |
Specification |
|
Die Type |
Curling / Beading / Necking / Profiling |
|
Cap Diameter Range |
Ø20 – 100 mm |
|
Forming Accuracy |
±0.02 mm |
|
Die Material |
Cr12 / SKD11 / Tool Steel |
|
Surface Finish |
Ra ≤ 0.4 μm on forming surfaces |
|
Hardness |
HRC 56–60 |
|
Service Life |
2–4 million pieces |
|
Fit Machine Type |
Rotary / Linear forming machine |
|
Setup Time |
15–30 minutes |
|
Adjustment Range |
±1.0 mm |
|
Standard Sizes |
Common beverage and food cap sizes |
|
Warranty |
1 Year |
|
Lead Time |
10–20 working days |
Production / Working Process
Step 1: Design – Forming profile designed from cap drawing
Step 2: Material Prep – Tool steel bar cut and annealed
Step 3: Rough Machining – CNC turning and milling
Step 4: Heat Treatment – Hardening and tempering
Step 5: Finish Grinding – Precision OD/ID grinding
Step 6: Profile Machining – CNC form grinding of contour
Step 7: Polishing – Mirror finish on contact surfaces
Step 8: Assembly – Die set assembled with guide components
Step 9: Testing – Production trial and sample verification
Application Scenarios
• Cap top edge curling dies
• Side wall beading dies
• Shoulder profile forming dies
• Neck-in reducing dies
• Special contour forming dies
Case Study
■ Customer Background
A beverage cap manufacturer launching a new premium bottle design with unique shoulder profile. They needed forming dies that could produce the distinctive shape while maintaining high production speed.
■ Project Challenge
• Custom asymmetric shoulder profile not standard geometry
• Must maintain 0.02mm profile accuracy at 250 PPM
• Material springback compensation required
• Needed to retrofit existing forming machines
■ Our Solution
• Designed custom profile forming dies from 3D cap model
• Compensated die profile for aluminum springback effect
• Manufactured adapter to fit existing forming machine spindles
• Performed iterative tryouts to refine profile accuracy
■ Result & Benefits
• Profile accuracy achieved within 0.018mm tolerance
• Successfully running at 260 pieces per minute
• Springback fully compensated in final die geometry
• Installed and production ready in 18 days
Frequently Asked Questions (FAQ)
Q: What types of forming operations can these dies perform?
A: Our forming dies handle curling, flanging, beading, necking, expanding, step forming, contour shaping and combination operations.
Q: How tight is the repeatability from die to die?
A: Production dies are manufactured with identical CNC programs and verified against master gauges, ensuring dimensional repeatability within ±0.02mm.
Q: Can forming dies be adjusted for different material thickness?
A: Yes, most forming dies have adjustable stroke or stop positions to accommodate slight variations in material thickness.
Q: What causes springback and how is it compensated?
A: Springback is elastic recovery of metal after forming. We compensate by over-forming the die profile based on material properties.
Q: Can you modify existing dies for new cap design?
A: Minor profile changes can often be accomplished by reworking existing die components. Major design changes usually require new tooling.
Q: Do you offer die tryout service?
A: Yes, we have trial presses in our facility where we can run production trials with your material.
Hot Tags: bottle cap forming dies, China bottle cap forming dies manufacturers, factory
