Core Selling Points
■ Precision deep drawing with depth control accuracy ±0.05mm
■ Adjustable blank holder force prevents wrinkling and tearing
■ Multi-stage drawing capability for high depth-to-diameter ratios
■ Constant pressure and constant stroke operating modes
■ Built-in ejection system with adjustable knock-out force
■ PLC control with touch screen for easy parameter setting
■ Suitable for aluminum, tinplate, stainless steel and copper
■ Can be used as standalone machine or integrated into lines
Technical Specifications
|
Parameter |
Specification |
|
Model Series |
KP-DD-40 to KP-DD-250 |
|
Nominal Press Force |
400 – 2500 kN (40–250 Tons) |
|
Ram Stroke Length |
350 – 710 mm |
|
Knock-out Force |
63 – 450 kN |
|
Drawing Speed |
60 – 80 mm/s |
|
Table Size |
450×450 mm to 1120×1000 mm |
|
Motor Power |
7.5 – 55 kW |
|
Max Drawing Depth |
Up to 150 mm |
|
Control System |
PLC + Proportional Hydraulic |
|
Material Compatibility |
Aluminum, Tinplate, Stainless Steel |
|
Certification |
CE |
|
Warranty |
2 Years |
|
Drive Type |
Hydraulic / Mechanical |
Production / Working Process
Step 1: Blank Loading – Flat metal blank placed on die nest
Step 2: Blank Holder Clamp – Blank holder secures blank periphery
Step 3: Punch Descent – Drawing punch descends into die cavity
Step 4: Material Flow – Metal flows radially inward forming side wall
Step 5: Draw Depth Control – Precision stop at predetermined depth
Step 6: Pressure Dwell – Brief holding at bottom position
Step 7: Punch Return – Drawing punch retracts upward
Step 8: Part Ejection – Ejector pushes formed shell from die
Step 9: Part Removal – Finished cap shell removed
Application Scenarios
• Deep draw bottle cap shell forming
• Aluminum screw cap and ROPP cap drawing
• Deep profile metal lid and end manufacturing
• Multi-stage progressive deep drawing operations
• Special shaped cap and container forming
Case Study
■ Customer Background
A pharmaceutical packaging manufacturer upgrading their cap production for high-depth screw caps. Their existing single-draw process was causing excessive thinning at the cap shoulder, leading to seal failures.
■ Project Challenge
• Cap depth-to-diameter ratio of 0.8:1 exceeded single draw capability
• Wall thickness variation must stay within ±0.02mm
• Required pharmaceutical-grade surface finish
• Needed to integrate with existing production line
■ Our Solution
• Installed KP-DD-100 deep drawing machine with double-draw configuration
• Designed two-stage progressive drawing die set
• Configured proportional hydraulic control for precise blank holder force
• Polished die surfaces for pharmaceutical-grade finish
■ Result & Benefits
• Successfully achieved 0.8:1 depth ratio with uniform wall thickness
• Wall thickness variation reduced to ±0.015mm
• Surface finish achieved Ra 0.3μm without polishing
• Seal failure rate dropped from 1.5% to 0.2%
Frequently Asked Questions (FAQ)
Q: What is the maximum depth-to-diameter ratio?
A: With single draw, typical ratio is 0.5–0.7:1. With multi-stage redrawing, depth-to-diameter ratio can reach 2:1 or higher depending on material ductility.
Q: What causes wrinkling in deep drawing?
A: Wrinkling is caused by insufficient blank holder pressure allowing material buckling. Our machines feature adjustable blank holder force and draw beads to control material flow.
Q: What is the difference between hydraulic and mechanical deep drawing?
A: Hydraulic press offers variable force throughout stroke, better for deep drawing. Mechanical press has higher cycle speed for shallow to medium depth production.
Q: How often do drawing dies need replacement?
A: Quality carbide drawing dies can produce 3–5 million pieces before requiring reconditioning, depending on production volume and material type.
Q: Can you provide drawing process development?
A: Yes, our engineering team can develop the drawing process, design progressive draw dies and run trials to optimize your product design.
Q: What lubrication is required for deep drawing?
A: We recommend specialized drawing compounds. The machine can be equipped with automatic lubrication application system for consistent results.
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