PWDS
Introducing the PWDS (Partial Wall Thickness Distribution System): A Game-Changer for Blow Moulding Efficiency
We are proud to introduce the PWDS (Partial Wall Thickness Distribution System)—an advancement in our blow moulding machines that dramatically changes parison wall thickness distribution for improved material efficiency and product quality.
Why PWDS?
Traditionally, the axial parison programming system varies the parison’s wall thickness uniformly across every horizontal section. While effective for the middle half of the drum, this approach falls short at the drum’s ends, particularly the L-ring section.
Here’s what happens:
- During the blowing process, the pinched parison expands unevenly—expanding minimally near the parting plane and excessively in lateral
- This results in an uneven wall thickness in the L-ring, especially around the bung areas, causing approximately 400 grams of excess material per
How PWDS Transforms the Process
When integrated with the axial parison programming system, PWDS ensures precise control over the wall thickness distribution, leading to significant improvements:
- Raw Material Savings: Reduces excess material usage by 400 grams per drum, improving the bottom
- Uniform Wall Thickness: Delivers uniform thickness in the L-ring, improving product
- Shorter Cooling Times: Speeds up cooling, enhancing production
- Uniform Cooling: Prevents uneven cooling in the L-ring
- Elimination of Built-in Stresses: Avoids internal stresses caused by uneven cooling, ensuring durability of
- Improved Drop Strength: Enhances performance under impact, making drums more
Superior Engineering for Reliability
The PWDS system incorporates a proportional valve and servo control hydraulics and electronics. Its mechanism uses die slides for precise operation, offering unmatched reliability. Unlike flex ring devices, which are prone to fatigue failure, PWDS is built for longevity and high performance.
Universal Applicability
The PWDS system isn’t limited to new machines; it can be retrofitted onto existing blow moulding machines, making it a versatile solution for manufacturers across the industry.
Why Choose PWDS?
With PWDS, you achieve greater efficiency, superior quality, and significant cost savings—all while ensuring your products meet the highest performance standards. Whether you’re producing L-ring drums or other blow-moulded articles, PWDS is the reliable choice for optimizing your operations.