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Fast Turn Compression Molded Parts

Rapid Tooling & Production Tooling Supportive

No MOQ Required

Various Tool Materials Supportive

Professional Engineering Support

Cost Effective With Reliable Quality

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What is Compression Molding

Compression molding is a high-efficiency thermoset molding process widely used for producing silicone, EPDM and rubber parts. It forms materials by heating and pressing pre-formulated raw material into a closed mold, ideal for simple to precision elastomer components, large flat parts and low-to-high volume production.This process features lower raw material loss (2%–5%), low internal stress, small warpage and more cost-effective tooling compared with other molding methods.

Core Compression Molding Services

Rapid Compression Tooling

We provide custom compression mold tooling based on your part geometry, tool life and finish requirements. Our tooling supports rapid fabrication for fast validation, with durable molds ideal for repeated production. We offer free long-term storage for your mold assets.

Compression Molded Parts

We manufacture high-quality custom silicone and rubber compression molded parts with stable dimensional accuracy. We support various colors and a full hardness range from Shore A 20 to Shore A 85, with reliable quality and high repeatability for diversified industrial applications.

Compression Molding Insights

Design & Precision Control

Uniform wall thickness, proper venting and draft design ensure stable curing and reduce warpage. Material shrinkage and curing characteristics are fully considered in mold design to guarantee dimensional accuracy and part stability.

Cost & Efficiency Optimization

Compression molding offers lower tooling cost, minimal raw material waste and high productivity with multi-cavity molds. It is highly cost-efficient for large flat parts and batch production, with shorter lead time for small-batch orders.

Compression Tooling Materials

We offer a full range of tooling materials to match your part geometry, tool life and surface finish demands.

· Cr12MoV

· Cr12

· DC53

· SKD11

· #45 Steel

· Q235

· 7CrSiMnMoV

· HT300

*The tools will be stored at our facility as your property, so you can order repeat moldings with cost effective price and short lead time

Compression Molding Materials

We provide full-series elastomer materials for compression molding, with customizable colors and hardness.

· Silicone Rubber (HCR / LSR)

· EPDM Rubber

· General Rubber Materials

· Hardness range: Shore A 20 – Shore A 85

Surface Finishes for Compression Molded Parts

We provide standard and customized surface treatments for compression molded parts.

Basic Finishes

Custom Finishes

As-Molded

Bead Blasting

Smooth Polishing

Mold Texturing

Laser Engraving

Pad Printing

View Details

Compression Molding Tolerance Guide

Our compression molding delivers stable dimensional accuracy for silicone and rubber parts.

Contact selina@marigold-rapid.com for full tolerance details.

Hole Position Tolerance (±mm)

Flatness Tolerance (±mm)

Dimensional Tolerance (±mm)

Size Range (mm)

Material Type

Silicone Rubber

EPDM & General Rubber

1–30

0.10

0.25

0.08

31–100

1–30

31–100

0.16

0.09

0.14

0.38

0.22

0.33

0.12

0.07

0.11

Advantages of Our Compression Molding

Compression molding is a very versatile process that can be used to create unique shapes or parts with complex insert requirements in a wide range of material compounds including custom materials.

• No MOQ limitation for all orders
• Quick turnaround of tools & parts
• Shore A 20–85 hardness available
• Highly competitive tooling & molding cost

• Free tool storage as your property
• Reliable quality & high repeatability
• Low raw material loss (2%–5%)
• Low internal stress & small warpage

Compression Molded Parts Applications

Because compression molding can produce parts in a wide array of lengths, thicknesses, and complexities, it is suitable for a number of industries and applications.

• Medical & Dental: Respirator masks, gaskets, syringe stoppers
• Consumer Products: Keypads, handles, buttons, household parts
• Food & Beverage: Seals, O-rings, hoses, bottle nozzles
• Automotive & Industrial: Sealants, engine components, pressure membranes
• Aerospace, Electronics & Energy: High-performance sealing & structural parts

Rapid Compression Molding Workflow

Step 1:

File Submission

Share your CAD part drawings

Step 2:

Quote & DFM

24h pricing + free design review

Step 3:

Tool Prepare

Custom compression mold fabrication

Step 4:

Material Prep

Select & prepare rubber/silicone material

Step 5:

Compression Molding

Heat pressing & curing production

Step 6:

Finishing & Shipping

Post-treatment & fast delivery

Frequently Asked Questions

What is the compression molding process?

We design and make a custom mold, heat the mold, put material into the cavity, apply high pressure and heat for curing, then take out the finished parts with stable precision.

What’s the difference between compression and injection molding?

Compression molding is better for large flat parts, lower tooling cost and less material waste. Injection molding is faster for small complex parts, while compression molding is more cost-efficient for elastomer products.

Do you have MOQ for compression molded parts?

No MOQ at all. We support 1pc prototype to mass production, with flexible pricing based on your order quantity and production needs.