Compression Molding Service
Durable, High-Strength Parts for Demanding Applications
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Compression Molding Services by Artemis 3D
Compression molding is a versatile production process we offer for manufacturing strong, durable, and complex parts. It involves placing pre-measured material—such as silicone, EPDM, or NBR—into a heated mold cavity, which is then closed under pressure until the part cures.
This method is ideal for custom seals, gaskets, and rubber components with excellent surface finish, dimensional stability, and heat, chemical, and corrosion resistance. The process serves automotive, aerospace, electrical, and medical industries.
We connect you with top compression molding suppliers, ensuring precise, cost-effective results and manage complex projects from design to production with expert guidance.
Compression Molding Materials
Our expertise lies in molding rubber elastomers—materials prized for flexibility, resilience, and resistance to heat, chemicals, and wear.
Silicone
Excellent flexibility and stability across a wide temperature range; ideal for thermal resistance, electrical insulation, and biocompatibility.
NBR (Nitrile Butadiene Rubber)
Superior resistance to oils, fuels, and hydrocarbons; go-to for seals and gaskets in automotive and industrial environments.
HNBR (Hydrogenated Nitrile Butadiene Rubber)
Oil and chemical resistance of NBR with improved heat and ozone resistance; enhanced durability for high-performance sealing.
FKM (Viton®)
Outstanding resistance to high temperatures, chemicals, and aggressive fluids; popular in aerospace and automotive.
EPDM (Ethylene Propylene Diene Monomer)
Highly resistant to weathering, ozone, and UV; excellent for outdoor and water-resistant applications, HVAC, and automotive.
IIR (Butyl Rubber)
Low gas permeability and excellent resistance to moisture and chemicals; suitable for airtight seals, pharmaceutical closures, and vibration damping.
CR (Chloroprene / Neoprene)
Balanced weather, ozone, oil, and flame resistance; commonly used in automotive, marine, and industrial applications.
FVMQ (Fluorosilicone)
Silicone flexibility and thermal stability with fuel and oil resistance; ideal for aerospace and automotive fuel system components.
FFKM (Perfluoroelastomer)
Highest chemical and thermal resistance among elastomers; choice for critical sealing in semiconductor, chemical, and pharmaceutical industries.
Compression Molding Advantages
Creates Unique Shapes
Enables production of complex forms that are challenging with other methods. Intricate details, undercuts, and varying contours in a single part.
Cost Effective
Relatively simple tooling and minimal material waste. Cost-effective for medium- to high-volume production. High-quality surface finishes reduce post-machining.
Supports Variable Thicknesses
Supports parts with walls that vary in thickness within a single mold, optimizing strength and weight for complex geometries.
Compression Molding Applications
Used across industries that require durable, precisely formed components for specific environmental, mechanical, or regulatory demands.
Dental and Medical
Biocompatible seals, diaphragms, and flexible components where cleanliness and precision are essential. Silicone is common for thermal stability, chemical resistance, and safety in medical environments.
Consumer Products
Consumer goods requiring custom shapes, soft-touch surfaces, or flexible features—grips, pads, buttons. EPDM is suitable for durability, weather resistance, and comfort.
Food and Beverage
Materials meeting strict regulatory standards. Food-grade silicone for gaskets, seals, and processing equipment; precision and surface integrity for food-safe parts without post-processing.
Manufacturing
Durable parts such as seals, vibration dampers, and protective covers. NBR, HNBR, and FKM (Viton®) for resistance to oils, chemicals, and extreme temperatures.
What is Compression Molding?
Also known as pressure molding or press molding—a process that shapes thermosetting plastics, rubbers, or composite fibers with heat and pressure. A pre-measured charge is placed in a heated mold cavity, the mold is closed and pressed, material cures, then the part is ejected.
How It Works
Material Preparation
A pre-measured "charge" is prepared—pellets, putty, sheets, or preforms depending on material type.
Mold Preheating
The compression mold is heated to a specific temperature, usually between 250°F and 400°F.
Material Loading
The charge is placed directly into the open, heated mold cavity with precise placement for even distribution.
Mold Closing and Pressing
The mold is closed under pressure (typically 100 to 2,000 tons), forcing the material to flow and fill the cavity.
Curing
Material is held at high temperature under pressure to cure and harden through chemical crosslinking.
Mold Opening and Part Removal
The press opens, the finished part is removed, flash is trimmed, and secondary finishing may be applied.
Alternatives to Compression Molding
Custom Plastic Injection Molding
Auto-quoted estimates for custom plastic molded prototypes and production runs.
Learn MoreLiquid Silicone Rubber Molding
Custom silicone prototypes and end-use production parts in 15 days or less.
Learn MoreWhy Choose Artemis 3D for Compression Molding?
Endless Options
Choose from millions of combinations of materials, finishes, tolerances, markings, and certifications.
Easy to Use
Get started with our platform and let our experts manage the project from manufacturing partner to delivery.
Vetted Network
ISO 9001:2015, ISO 13485, and AS9100D certified. Only top shops pass our qualification process.
Frequently Asked Questions
What information do I need to provide to get an accurate quote?
Upload your 3D CAD file and any supporting drawings. Tooled processes like compression molding require CAD in a native solid format (STEP, SLDPRT, IPT, PRT, etc.).
What materials can you work with for compression molding?
We specialize in compression molding rubber elastomers such as silicone, NBR, FKM (Viton), EPDM, HNBR, IIR (Butyl), CR (Chloroprene), FVMQ, and FFKM.
What is your typical lead time for tooling and production?
Lead time for compression-molded orders is typically between 20 and 30 business days, depending on quantity, part complexity, and project specifications.
Can you support both prototyping and high-volume production?
Yes! We support everything from smaller prototype runs to high-volume production, plus complementary services like 3D printing and injection molding.
What tolerances can you achieve?
Standard tolerance for compression-molded parts is +/- 0.010". Tighter tolerances are achievable depending on geometry and material selection.
Do you provide design support or manufacturability feedback?
Yes! We offer in-depth DFM reviews with every tooled process order. Our engineers and manufacturing experts work closely with you every step of the way.
Can I supply my own tooling?
We typically use in-house or approved tooling to ensure quality and avoid compatibility issues. We're happy to evaluate customer-supplied tooling on a case-by-case basis.
Do you support ITAR or ISO-certified projects?
We are ITAR-registered and certified to ISO 9001:2015, ISO 13485, IATF 16949, AS9100D, and CMMC Level 2. You can specify certification requirements when building your quote.