LARGE PART PLASTIC MOLDING

Mack Molding – Large-Part & High-Tonnage Molding Services

East Coast expertise in bringing big, complex parts to life with strength, reliability, and cosmetic quality

When it comes to molding large, complex, and high-aesthetic plastic parts, Mack Molding delivers. With decades of experience and one of the East Coast’s most capable large-tonnage fleets, we bring strength, precision, and design integrity to even the most challenging applications.

World-Class Large Tonnage Fleet

Across our Northeast and Southeast facilities, Mack operates a world-class press fleet that includes a robust lineup of high-tonnage machines ranging from 1,500–4,000 tons dedicated to large-part production. This breadth of capability gives customers the power, control, and flexibility to produce large, integrated components with fewer assemblies and superior performance.

Mack delivers consistent results on even the most demanding geometries through engineering support, robotic handling, gas-assist molding, and custom post-mold services — technologies that enable precision, repeatability, and cosmetic excellence across a full range of part sizes and complexities. In-house engineering, tool-transfer management, and program-launch expertise ensure every large-part project is built for manufacturability, quality, and repeatability.

Design & Performance Advantages of Large Part Plastic Molding

Large-part molding opens new possibilities for design, durability, and efficiency:

• Strength & Durability: Molded-in features replace machining or bonding, with parts built for demanding environments.
• Size Capability: Mold parts up to 5 ft x 3 ft and up to 50 lbs.
• Weight Reduction: Replace metal or fiberglass with plastics and structural foam for lighter, high-performance parts.
• Design Flexibility: Larger, more complex parts mean fewer assemblies.
• Cost Efficiency: Automation and cycle-time improvements drive volume savings.

Your Advantage

With Mack, you get more than capacity — you get capability. Our combination of engineering support, automation, and large-tonnage molding expertise delivers durable, cosmetic-critical parts that perform under pressure.

Powered by a highly automated, energy-efficient fleet, Mack’s advanced systems — from servo-hydraulic and all-electric presses to gas-assist molding, robotic handling, and in-house CNC machining — reduce waste, improve consistency, and cut cycle times.