Engineering Resources

Understand how injection molding processes work, when to use them, and what separates a capable molder from a commodity supplier.

• What is scientific molding and why does it matter?
• Insert molding: how it works and when to use it
• Overmolding: materials, applications, and design considerations
• Low volume injection molding: aluminum tooling, lead times, and costs
• Anatomy of an injection mold: a visual guide to mold components

Resin selection determines part performance, manufacturability, and regulatory compliance. These guides help you choose the right material before tooling begins.

• High temperature resins: PEEK, Ultem, Torlon, PPS, and PPA compared
• Medical-grade resin selection for injection molded devices
• Material selection and DFM: how PTI’s engineers evaluate your design

Parts that aren’t designed for injection molding cost more, take longer, and produce more defects. These resources help you get it right before cutting steel.

• Download PTI’s free Design for Manufacturing (DFM) guide
• DFM analysis: what PTI reviews before your mold is built
• Mold design: SPI classifications, tool materials, and build standards

For regulated industries, quality isn’t a checkbox — it’s a documented system. These pages explain PTI’s approach and what buyers in medical, defense, and aerospace programs need to know.

• IQ/OQ/PQ process validation: what it is and how PTI executes it
• PTI’s quality certifications: ISO 13485, ISO 9001, FDA, ITAR
• Injection mold tool transfers: process, validation, and what to expect

Choosing an injection molder is a high-stakes decision. These resources help you ask the right questions and evaluate the right criteria.

• What to look for in a cleanroom injection molder
• What single-source contract manufacturing means — and why it matters
• Frequently asked questions about working with PTI

What types of content does PTI publish?

PTI publishes technical guides, process explainers, material comparison articles, buyer guides for injection molding supplier selection, and case studies drawn from real programs. All content is written by or with PTI’s engineering team and reflects 40+ years of injection molding experience across medical, defense, aerospace, and industrial applications.

Who is this content written for?

PTI’s resources are written primarily for mechanical engineers, product designers, quality engineers, and procurement managers who specify, qualify, or source injection molded plastic components. Content is technical but explained clearly — we don’t assume everyone reading is a mold engineer, but we don’t oversimplify for those who are.

Can I contact PTI’s engineers directly with a technical question?

Yes. PTI encourages direct technical conversations. If you have a question about a specific process, material, application, or design challenge, contact us here or call (586) 263-5100. You’ll speak with an experienced engineer, not a sales representative.

Does PTI offer DFM reviews before quoting?

Yes. PTI’s engineering team reviews customer CAD data and provides Design for Manufacturability (DFM) recommendations before tooling begins. This is included as part of PTI’s quoting process at no additional cost. Learn more about PTI’s engineering services →

How do I request a quote?

Submit your project details — part drawings, material requirements, volume, and timeline — through PTI’s quick quote form. PTI’s team will respond with a quote and any DFM observations typically within a few business days.