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Multi-cavity injection molding refers to injection molding that uses more than one cavity. These are multi-component molds. Multi-cavity injection molds should not be confused for family injection molds. Multi-cavity injection molds can produce more than one product, or component, while family injection molds can produce multiple parts or sets.

Our multi-cavity injection mold experts can help you create the right injection molding solution for your needs.

Contact us if you have any questions about which injection molding process or material is best for your needs. Our experts in injection molding are available to assist you with your multi-cavity molding needs.

Multi-Cavity Injection Molding vs. Single-Cavity Injection Molding

Although both single-cavity or multi-cavity injection molds offer advantages, it is important that you understand the differences and how they work.

Multi-Cavity Injection Molding

Multi-cavity injection molding has many benefits:

  • Multiple parts can be produced in a cost-effective manner
    • Multi-cavity molding produces more parts an hour
  • High production efficiency results in shorter lead times
  • We have less scrap/wasted material
    • Stack Plastics uses hot runner molds to minimize waste, speed up cycle times, and ensure consistent molds.

Multi-cavity injection molding poses challenges, including:

  • Increased upfront capital investment
  • When compared to single-cavity injection mold, lead times are longer
  • It reduces the effectiveness of the mold if one cavity is closed.

Single-Cavity Injection Molding

Single-cavity injection molding offers many benefits, including:

  • Set cycle times make it cost-effective
    • Multi-cavity injection molding is less expensive than multi-cavity molding
  • Produce faster
    • Multi-cavity injection molding is less expensive than multi-cavity molding

The challenges of single-cavity injection molding include:

  • Multi-cavity injection molding has a lower production rate
    • This is not the best choice for large production runs.
  • Low production capabilities lead to an increase in the cost of parts.

Multi-Cavity injection Mold Factors to Consider

When deciding between single-cavity or multi-cavity injection molds, one of the most important factors to consider is production run volume and lead time. Multi-cavity injection molds may not be the best choice if you have tight time frames. Multi-cavity injection molds can be more expensive than single-cavity ones, but they offer cost savings.

Design factors to consider for multi-cavity injection molding

  • Mold Geometries. Because multi-cavity injection molding is multi-layered, it is crucial to maintain a consistent distribution of core materials. The materials used and the way the core materials enter the cavity mold can influence this distribution.
    • Material distribution can be adversely affected by the flow pattern and injection flow rate
    • Symmetrical designs offer better distribution
  • Multi-cavity design modifications Additional design changes that can help to create multi-cavity injection mold designs are venting, tight tolerances and pressure of molding.
  • Dimensions of the multi-cavity mold. Complexity comes with size. Multi-cavity molds are larger and more complicated.

Injection Molding Types to Consider for Custom Multi Cavity Molding

Preferred Tool can produce all types of injection molding including:

  • Overmolding
  • Medical molding
  • Ultrasonic welding
  • Micro molding

Talk to Us about Your Multi-Cavity Molding Requirements

Trust Preferred Tool to help you with your next multi-cavity mold project. Request a quotation or Contact us to get started with your project.