What Are the Types of Compression Molds?

Compression molding is a popular manufacturing process used to shape thermoset plastics and rubber materials. By placing a pre-measured amount of material into a heated mold, the material is compressed to fill the mold cavity, forming a precise part. Here are the most common types of compression molds:

Single Cavity Molds

These molds produce one part per cycle. They are simple, cost-effective, and ideal for prototyping or small batch production.

Multi-Cavity Molds

Multi-cavity molds can produce multiple identical parts in a single cycle, increasing efficiency for medium to large production runs.

Family Molds

Family molds allow different parts to be molded simultaneously in one cycle. They are useful for assemblies or sets of components.

Split Molds

Split molds are designed in multiple parts, which can be separated to remove complex or intricate shapes. They are commonly used for detailed parts with undercuts.

Floating Molds

Floating molds include a movable section that can adjust to material flow or part shrinkage, improving consistency and reducing defects.

Conclusion

Choosing the right mold type depends on production volume, part complexity, and material requirements. Understanding these mold types helps manufacturers select the most efficient process while maintaining high-quality parts.

Compression molding remains a reliable choice for producing durable, high-precision parts in industries like automotive, electronics, and consumer goods.