CUMSA | Cumsa USA, LLC | United States

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Online Ordering only Available in U.S. & Canada

New

Catalog

for 2026!

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New Products

Mini Lifter (ML) Compact, Mechanical Undercut Release

The ML is a compact, fully mechanical lifter engineered to release small undercuts with speed, precision, and reliability.

Efficient Angular Movement

Provides an 8º angular travel range, ideal for clean, controlled demolding in tight spaces.

Sized for Your Mold

Available in 4, 8, and 12 mm widths, giving designers flexibility to integrate the ML into a wide variety of part geometries and mold layouts.

High‑Performance Coating Option

A DLC‑coated version is available for high‑speed production environments and demanding sectors such as medical molding—enhancing durability, wear resistance, and long‑term stability.

Ideal for Multi‑Undercut Applications

A smart alternative for molds with multiple undercuts, offering a compact footprint and simplified mechanics compared to more complex lifter systems.

Central Double Ejection System (CE)

The CE is a compact, fully mechanical unit engineered to deliver a precise two‑stage central ejection—ideal for parts requiring controlled, sequential release.

Two‑Stage Double Ejection

Stage 1: Both plates advance simultaneously for the initial release.
Stage 2: The final plate completes the ejection independently, ensuring a clean, reliable finish for complex geometries.

Sized for Your Mold

Available in 4, 8, and 12 mm widths, giving designers flexibility to integrate the ML into a wide variety of part geometries and mold layouts.

Optimized for Small and Medium Molds

Designed specifically for small and medium‑sized molds, the CE provides powerful functionality in a compact footprint, making it easy to integrate without compromising mold layout.

External Delayed Synchronizer (DZ)

The DZ is a key component of the EZ External Plate Synchronizer, engineered to deliver precise, delayed plate movement during mold opening.

Controlled, Sequential Opening

The DZ allows you to define a specific opening sequence, ensuring the mold operates exactly as required for complex part designs.

Delayed Plate Movement

During the initial mold opening, the ejection plates remain stationary. They then begin moving later—synchronized with the mold’s full opening—to achieve a smooth, controlled progression.

Compact, Reliable Solution

Its compact design provides accurate plate control without adding complexity, making it ideal for molds that demand precise timing and dependable performance.

External Inverted Double Ejection System (JY)

The JY is a compact dual external ejection solution that delivers a combination of free and limited movements, adapting seamlessly to the needs of each mold design.

Two Configurable Motion Sequences

Double Reverse Ejection Ideal for molds with two ejector plates. In this configuration, the machine actuates the lower plate set, enabling a controlled reverse ejection sequence.
Floating Stripper Plate The first movement is limited, followed by a free second movement—perfect for applications requiring a progressive, flexible release.

Compact and Versatile

Engineered for molds that demand precise, reliable plate control, the JY provides a space‑efficient solution without adding mechanical complexity.

Collapsible Core (ZC) Custom‑Engineered for Complex Demolding

A precision‑built collapsible core designed to demold challenging undercuts, threads, and other negative geometries in injection‑molded parts.

Ready to Install

Delivered as a complete, optimized assembly to reduce machining, setup, and integration time. Each unit is custom‑engineered to meet your mold’s exact requirements.

Shorter Cycle Times

Unlike traditional unscrewing systems, CUMSA’s collapsible cores enable earlier demolding. The core collapses away from the undercut during ejection, allowing the part to release before full solidification—boosting productivity and reducing cycle time.

Compact, Low‑Maintenance Design

Engineered to minimize space inside the mold while simplifying maintenance and inspection. A clean, efficient solution for high‑performance molding environments.

Built to Fit Your Application

Available in standard and DLC‑coated versions. Suitable for both single‑cavity and multicavity molds, ensuring adaptability across a wide range of part designs and production needs.

The Next Generation Sprung Core (PZ)

The newest PZ brings together the strongest features of previous sprung‑core designs into one fully optimized, compact solution for small undercuts.

Smaller Footprint, Bigger Capability

The first truly compact sprung‑core solution engineered for small undercuts—delivering maximum performance while occupying minimal space inside the mold.

Enhanced Precision from the PX Line

Incorporates the g6 tolerance and head‑position adjustment system from the PX series, ensuring exceptional accuracy, alignment, and repeatability.

Ready for Larger Molds

Fully compatible with the AP extender, allowing seamless integration into larger mold designs without sacrificing performance.

All Functions, One Smart Solution

All key features are integrated into a single, cost‑effective unit—offering the best performance‑to‑price ratio in its category.

THE ORIGINAL CUMSA DATE STAMPS

Which double rack do I need?

Find the best fit for your project

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GET IN TOUCH

OFFICE HOURS

Mon - Fri: 9am - 4pm

950 Stephenson Hwy, Troy, MI 48083, USA

info@cumsausa.com

(248) 850-8385

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