Producing high-performance plastic components takes more than just reliable molding—it demands precision at every step. That’s why PMC integrates precision machining in plastic molding to go beyond the limitations of molding alone. By refining parts after they’re molded, we can achieve ultra-tight tolerances and consistent results that standard processes simply can’t match. The result? Durable, accurate components built to meet the strict demands of industries where failure isn’t an option.
Why Precision Matters in Plastic Part Production
Injection molding is an incredibly efficient way to produce plastic parts at scale. However, even the best molds come with inherent limitations, particularly when it comes to holding tight tolerances. That’s where precision machining comes in.
Precision machining in plastic molding helps address the subtle, yet critical, variations that occur during the molding process, like shrinkage that differs across material flow directions or minor part warpage that affects fit and function.
By using machining to fine-tune molded components, PMC can achieve tolerances up to four times tighter than many of our competitors. The result? Plastic parts that perform better, last longer, and are less likely to experience failures in demanding environments.
The PMC Advantage: Engineering-Grade Accuracy
At PMC, we specialize in machining plastic, not metal. This means we understand the unique behaviors of engineered resins, from how they shrink and expand to how they respond to stress and wear.
Our process includes:
- Compensating for material shrink rates in all directions
- Using advanced equipment to refine dimensions post-molding
- Creating critical fits and features that molding alone can’t guarantee
This is especially important for industries like aerospace, medical, automotive, and electronics, where a fraction of a millimeter can be the difference between failure and flawless performance.
Combining SLA 3D Printing with Precision Machining
To further streamline development, PMC now offers in-house 3D printing using the FormLabs Form4 SLA printer. This high-resolution stereolithography (SLA) technology allows clients to prototype realistic, fully functional versions of their parts, often within 24 to 48 hours.
3D printed prototypes are especially valuable for:
- Marketing assets and photography
- Customer feedback and design testing
- Early identification of form, fit, and function issues
These printed parts provide the look and feel of a final product, helping clients make design decisions before tooling is complete. And because PMC combines SLA printing with precision machining, we can help bring your part all the way from prototype to production with minimal delay.
Built to Withstand Real-World Use
When product failure isn’t an option, precision matters. PMC’s machining process is designed to improve structural integrity and reduce performance risks. Clients choose PMC because they know their parts will:
- Maintain dimensional accuracy over time
- Hold up under stress, heat, and environmental exposure
- Pass quality control and regulatory requirements
By applying precision machining in plastic molding, we help you protect your brand, reduce costly failures, and extend product life cycles.
Ready to Improve Your Plastic Parts?
Whether you need ultra-precise molded components, rapid prototyping, or both, PMC has the tools and expertise to deliver. Our focus on precision, speed, and quality ensures your plastic parts perform exactly as intended.
Contact PMC today to learn how our precision machining and SLA 3D printing solutions can enhance your product development process.
FAQs
What is precision machining in plastic molding?
Precision machining in plastic molding is the process of using CNC or other cutting tools to fine-tune molded parts for improved accuracy, performance, and fit.
Why is machining necessary after plastic injection molding?
Molded parts can experience slight dimensional changes due to material shrinkage. Machining helps correct these variations and achieve tighter tolerances.
How accurate is PMC’s machining process?
PMC regularly delivers parts with tolerances 4x tighter than industry averages, thanks to decades of experience and deep knowledge of plastic behaviors.
What is SLA 3D printing and why does PMC use it?
SLA (stereolithography) is a high-resolution 3D printing method. PMC uses the FormLabs Form4 SLA printer to create realistic prototypes quickly and accurately.
Can I get a prototype before full production starts?
Yes. PMC’s 3D printing service allows you to get a visual and functional copy of your part before tooling is finalized, saving time and reducing costly design changes.