Stack Mould

Stack Mould Manufacturing for High-Volume Injection Molding

UTTMould designs and manufactures stack moulds for high-volume plastic injection molding projects that need higher output without simply increasing machine size. A stack mold can use multiple molding levels to increase cavity output and improve production efficiency when the product design and molding requirements are suitable.

Stack moulds are often considered for packaging parts, consumer products, thin-wall plastic components and other repeat-volume parts where cycle time, machine utilization and part cost are important.

Stack Mold Capabilities

Capability	Engineering Focus	Customer Benefit
Two-level stack mold	Balanced filling, cooling and ejection across mold levels	Improves output per machine cycle
Multi-level stack mold review	Mold opening, center section movement and machine compatibility	Helps match tooling design to production goals
Hot runner and gate planning	Flow balance, pressure loss, material behavior and cycle time	Supports stable production quality
Cooling and ejection design	Temperature control and repeatable part release	Reduces cycle time and part deformation risk

When a Stack Mould Is Suitable

• The part has high production volume and stable demand.
• The customer needs more output from the same injection molding machine size.
• The part design supports balanced filling and reliable ejection.
• Cycle time and cost per molded part are important project targets.

Stack Mould Project Process

1. Production target review: We review annual quantity, part size, material, tolerance and cycle time target.
2. Mold concept: Engineers evaluate cavity layout, stack levels, machine compatibility and hot runner requirements.
3. Tooling design: The design covers center section movement, guide system, cooling, ejection and maintenance access.
4. Manufacturing and assembly: Mold components are machined, fitted and assembled for trial.
5. Trial and optimization: Trial parts are checked for filling balance, dimensions, appearance and production stability.

Related Services

Stack mold projects need strong mold design, accurate tooling capability and strict quality control. UTTMould can support the project from DFM to mold trial.

Frequently Asked Questions

What is a stack mould?

A stack mould is an injection mold with multiple molding levels that can produce more parts per cycle than a conventional single-face mold.

Does every part suit stack molding?

No. The part size, material, volume, mold structure and injection molding machine must be reviewed before choosing a stack mold.

Can a stack mold reduce part cost?

For suitable high-volume projects, a stack mold can increase output and reduce cost per part by improving machine utilization.

What should I send for stack mold evaluation?

Please provide 3D files, drawings, material, quantity, target cycle time, machine information if available and quality requirements.