Custom Rubber Mold Manufacturing Services

At Temco Rubber, we design, engineer, and machine high-precision industrial molds for custom elastomeric products. Our in-house manufacturing division covers the entire lifecycle of your tooling—translating initial 2D drawings and 3D models into robust multi-cavity production molds that adhere to strict dimensional tolerances.

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Critical Engineering Tooling Standards

A high-quality molded component is a direct result of meticulous mold engineering. Our design engineers optimize every tool configuration using advanced simulation software.

Shrinkage Calculations

Depending on Shore hardness and curing parameters, elastomers exhibit linear shrinkage of 2% to 4%. We calculate precise scaling values in-house to secure tight tolerance compliance.

Strategic Venting

Improper venting accumulates trapped air, causing burn marks or voids. Our molds integrate strategic micro-channels and venting bridges to allow air escape during material injection.

Flash & Parting Line Control

Precise land design and parting line placement prevent excessive flash overflow. Our molds secure zero-flash production, reducing secondary deflashing costs.

In-House Tooling & Machining Division

We do not outsource tool construction. Temco Rubber machines all mold cores and cavities in our specialized CNC tooling shop. Utilizing multi-axis vertical machining centers and high-precision Wire EDM cutting, we shape mold cavities out of premium steel alloys optimized for high clamping forces and thermal stability.

Machined from premium tooling steel for maximum tool longevity and cycle counts
Sub-micrometer cavity surface polishing prevents demolding damage
Integrated hot/cold runner manifolds engineered to reduce compound waste
Modular mold bases support quick-change interchangeable cavity inserts

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In-House CNC Tooling shop machining steel rubber molds

Engineered Mold Classifications

We design and manufacture molds tailored for specific hydraulic press systems and production methodologies to achieve the perfect balance between tooling cost and piece price.

Compression Molds

Designed for traditional, high-pressure hydraulic presses. Raw compound pre-forms are placed directly into open cavities. Highly cost-effective tooling investment, ideal for oversized parts, heavy-duty dampeners, and low-to-medium series production runs.

Transfer Molds

Features an integrated transfer chamber (pot) and plunger. The material is pressurized and forced through sprues into closed cavities. Ideal for detailed configurations, delicate multi-insert overmolding, and rubber-to-metal bonding assemblies.

Injection Molds

High-end multi-cavity molds engineered with precision gates, cold runner blocks, and cooling channels. Best suited for high-volume automated contract manufacturing, delivering extremely fast cycle times and maximum dimensional consistency.

Tooling & Moldmaking FAQ

Get answers to critical technical questions regarding tooling longevity, mold releases, and in-house steel machining capabilities.

What steel grades are used for custom rubber molds? +

We select steel grades based on your production volume and chemical compatibility. For high-volume automated injection tooling or corrosive compounds (like FKM/Viton), we machine core and cavity plates from premium grade hardened steel with chrome plating. For low-volume compression prototypes, high-strength pre-hardened tooling steels provide a cost-effective and highly durable solution.

How is rubber shrinkage compensated during mold making? +

Linear thermal shrinkage occurs as the cross-linked elastomer compound cools down from the vulcanization temperature. This shrinkage typically ranges from 2% to 4%, depending on the polymer type and filler loading. Our design engineers use finite element analysis (FEA) to scale cavity geometries proportionally, ensuring the molded parts meet the exact specs of your 2D drawings.

Do you offer prototype or bridge tooling services? +

Yes. Before manufacturing high-volume, multi-cavity production molds, we can develop single-cavity prototype tools. Prototype tooling allows you to evaluate material properties, physical dimensions, and mechanical performance under real operating conditions, saving time and investment capital before committing to mass production runs.

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