Compression Molding Service

Transforming Designs into Durable Reality: Fast, Flawless, and Affordably Engineered.

  • Cost-Effective Solutions
  • 24-Hour Prototype Delivery
  • 100% Inspection Commitment

Our Compression Molding Services


Common for high-strength, durable parts using materials like epoxy and polyester.


Similar to thermosetting compression molding, for plastics like ABS and PP, with temperature-controlled cooling.


Specialized for elastomers, produces seals, gaskets, and insulation parts.


Involves laminated plastics and fiber reinforcements, creates high-strength parts.


Specific for silicone parts, often uses 3D-printed molds for prototypes and low-volume production.

Finishing Options for Die Casting

Compression Molding Parts Made by NOWfab

Explore Our Success Stories: Overcoming Customer Challenges

We were grappling with achieving a design that was both aesthetically pleasing and durable enough to withstand daily use. The precision and quality we achieved through NOWfab’s compression molding process were transformative. Not only did our accessory come to life exactly as we envisioned, but we also shattered our own benchmarks for durability. The NOWfab team was a beacon of expertise and support, guiding us through every step. Our successful product launch is a testament to this collaboration, and we’re already planning our next innovation together.’

Jamie Lin

Product Development Manager, TechGadget Innovations

In the medical device industry, the margin for error is zero. Our partnership with NOWfab was pivotal. Their compression molding services not only met but exceeded the rigorous medical standards required for our products. The dedication and expertise of the NOWfab team ensured that every implant was flawless. They weren’t just a service provider; they were our partners in innovation, playing a crucial role in bringing relief to patients faster.

Samantha Rivera

Chief Engineer, MedTech Solutions

Our collaboration with NOWfab revolutionized our product line. The strength and durability we achieved with their compression molding techniques were unparalleled. It was a leap forward in our quest for excellence. Working with NOWfab wasn’t just about accessing their state-of-the-art technology; it was about tapping into a team that was as committed to our success as we were. Our vehicles are performing better than ever, thanks to the foundations laid by this partnership.

Michael Thompson

Senior Design Engineer, AutoInnovate Components

Compression Molding FAQs

1. Why are my compression molded parts not meeting dimensional tolerances?

Dimensional inaccuracies in compression molded parts can result from several factors, including improper mold design, inaccurate temperature control, or inadequate pressure application during the molding process. Ensuring that the mold is precisely engineered and maintaining consistent temperature and pressure throughout the curing cycle are critical steps to achieving the desired tolerances.

2. How can I prevent air entrapment in compression molded parts?

Air entrapment, leading to voids or incomplete filling, is a common issue that can compromise the strength and appearance of the part. To minimize this problem, consider designing the mold with proper venting channels to allow air to escape. Additionally, adjusting the material preheating temperature and the mold closure speed can help eliminate trapped air.

3. What causes surface defects in compression molded products?

Surface defects like waviness, sink marks, or surface porosity can occur due to several reasons, including uneven material flow, insufficient curing time, or inappropriate molding temperatures. Optimizing the material placement in the mold, ensuring uniform heating, and fine-tuning the curing time based on the material properties can help mitigate these issues.

4. Why do some compression molded parts have weld lines, and how can I avoid them?

Weld lines form when two flowing fronts of material meet but don't properly fuse together, often due to inadequate pressure or temperature at the meeting point. To avoid weld lines, consider modifying the mold design to optimize material flow or increasing the molding pressure to ensure better fusion of the material fronts.

5. How can I reduce cycle times in compression molding without compromising part quality?

Reducing cycle times while maintaining quality is crucial for efficiency. This can be achieved by optimizing the mold temperature (to speed up curing without causing thermal degradation), using faster-curing material formulations, and improving the mold design for quicker opening, closing, and part ejection. Additionally, employing automated systems for material placement and part removal can significantly reduce overall cycle times.

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