Top 8 Unscrewing Mold Suppliers In The World

Finding the right partner for complex molding projects is critical, especially when dealing with threaded parts that require precise unscrewing mechanisms. Unscrewing molds are sophisticated tools used primarily for manufacturing plastic parts with internal threads, such as bottle caps, medical luer connectors, and plumbing fittings. These molds require intricate engineering to rotate the cores during the ejection phase, ensuring the threads remain intact.

To help you navigate the global market, we have compiled a list of the top 10 suppliers known for their expertise in unscrewing mold technology and high-precision injection molding.

Quick Comparison Table

What to Consider When Looking for Manufacturers?

When selecting a supplier for unscrewing molds, the technical stakes are higher than standard injection molding. Consider the following:

• Drive Mechanism: Does the manufacturer use hydraulic racks, servo motors, or mechanical collapsing cores? Servo-driven unscrewing molds generally offer higher precision and cleanliness suitable for medical applications.
• Cycle Time: In high-volume industries like packaging (caps and closures), a difference of seconds in cycle time can impact profitability. Look for suppliers who optimize cooling and rotational speed.
• Thread Precision: Ensure the supplier can guarantee tight tolerances on thread start and stop positions to prevent leakage in the final product.
• Maintenance Support: Unscrewing molds have many moving parts. A supplier that offers robust spare parts support and easy-maintenance designs is essential.

How to Verify a Reliable Supplier?

Before committing to a contract, verify the supplier’s capabilities through:

1. Certifications: Look for ISO 9001 for quality management. If you are in the automotive or medical sectors, look for TS 16949 or ISO 13485 respectively.
2. In-House Capabilities: Does the supplier handle the design, tooling, and testing in-house? Suppliers who outsource critical steps often have less control over quality and timelines.
3. Testing Procedures: Ask about their validation process. A reliable supplier should provide comprehensive CPK reports and use CMM (Coordinate Measuring Machines) to verify thread geometry.
4. Portfolio and References: Request case studies specifically related to threaded parts to see their experience with unscrewing mechanisms.

Top 10 Global Unscrewing Mold Manufacturers

1. Husky Technologies™

Husky is a global leader in providing integrated injection molding solutions for the plastics industry. They offer a comprehensive range of machines, molds, and hot runners tailored for various applications. They are particularly renowned for their beverage closure solutions, including the HyCAP™ system, which sets the industry standard for high-performance closure manufacturing.

• Country: Canada
• Website: https://www.husky.co/
• Main product: Injection molding systems, including HyCAP™ for closures.

2. StackTeck Systems Ltd.

StackTeck specializes in complex injection molds designed for high-volume production. They have developed proven technology for unscrewing closures that require the ejection of parts with aggressive threads. Their expertise extends to high-cavitation and high-speed applications, making them a top choice for packaging manufacturers.

• Country: Canada
• Website: https://stackteck.com/
• Main product: High-cavitation and high-speed injection molds.

3. GBM

GBM Mold Technology Co., Ltd., established in 2012, is a National High-Tech Enterprise and a global leader in “precision mold design + manufacturing + injection molding” one-stop services. They hold ISO 9001, ISO 14001, and TS 16949 certifications. GBM specializes in high-precision unscrewing molds, utilizing servo or hydraulic precision transmission to achieve thread positioning accuracy of ±0.5 degrees and cycle times between 18-30 seconds. Their facility includes top-tier CNC machining centers, EDM machines, and a clean injection workshop, serving clients in over 15 countries.

• Country: China
• Website: https://gbminjection.com/
• Main product: injection mold,injection molding,2 Shot Mold,Insert Molding,Unscrewing Mold,Connector Mold,Stack Mold,Hot Runner Mold

4. KEBO AG

With over 40 years of experience, KEBO AG is a Swiss manufacturer known for high-precision, multi-cavity injection molds. They serve the medical and packaging sectors and offer advanced solutions, including molds featuring in-mould servo motor technology specifically designed for complex unscrewing applications.

• Country: Switzerland
• Website: https://www.kebo.com/
• Main product: High-performance injection molds for medical and packaging.

5. Plastisud

Plastisud is a leading French engineering and manufacturing company focused on high-speed, high-precision multi-cavity molds. They have deep expertise in the closures market, medical parts, and thin-wall packaging, delivering robust tooling solutions for high-volume production environments.

• Country: France
• Website: https://www.plastisud.com/
• Main product: High-precision, multi-cavity molds for caps and closures.

6. Focare Mould Co., Ltd.

Focare Mould is a Chinese manufacturer that focuses on high-precision and complex mold designs. Their portfolio includes multi-shot, stack, and specifically unscrewing molds. They provide solutions for various industries requiring intricate mechanisms to mold threaded plastic parts.

• Country: China
• Website: https://www.focaremould.com/
• Main product: Plastic injection molds, including two-color and unscrewing molds.

7. Top Grade Molds (TGM)

Top Grade Molds designs and manufactures high-quality, precision-built custom injection molds. They serve leading industrial and thin-wall packaging manufacturers worldwide, providing tooling that meets rigorous standards for durability and cycle speed.

• Country: Canada
• Website: https://www.topgrademolds.com/
• Main product: Custom injection molds for packaging.

8. Zanola s.r.l.

Zanola is an Italian manufacturer specializing in the design and construction of high-production injection molds. They have extensive experience in the caps and closures sector, particularly in unscrewing mold technology used to produce threaded caps efficiently.

• Country: Italy
• Website: http://www.zanolamoulds.it/
• Main product: Injection molds for caps and closures.

Conclusion

Choosing the right unscrewing mold supplier is a balance between technical capability, production capacity, and geographical support. Whether you require the massive scale of systems from Husky, the specialized high-cavitation expertise of StackTeck, or the agile, one-stop precision manufacturing offered by GBM, this list represents the best in the industry. We recommend contacting these manufacturers directly to discuss your specific DFM (Design for Manufacturing) needs and to request a quote tailored to your project requirements.