A History of Excellence – Since 1952
Custom Plastic Injection Molding Services
Precision-driven plastic parts built for mission-critical performance
A History of Excellence
Since 1952
Full Service Mold Maker
& Plastic injection Molding Company
High-Volume Injection Molding with Tight-Tolerance Precision
H&H has spent decades refining our mold-making & injection molding techniques. We don’t just ship custom parts — we create molding components that keep your production lines running at full steam.
H&H Molds is built to withstand global trade volatility:
Many manufacturers remain vulnerable to shifting tariffs and overseas uncertainty. Supply chains can crack virtually overnight. That’s why H&H keeps the core of your project anchored firmly on US soil. Even if a build involves global components, your work will remain protected under American standards, accountability, & oversight.
Since 1952, as Pre-Met and eventually H&H Molds, we have been at the forefront of precision injection molding and mold making, serving industries across the spectrum. Over the years, we’ve built a reputation for delivering cost-effective solutions that never compromise quality. Our journey began with a focus on craftsmanship, and today, that same commitment drives our pursuit of innovation and excellence.
We specialize in low volume, tight tolerance molding of engineering and commodity grade thermoplastic resins.
Whether you need engineering-grade thermoplastic parts or commodity-grade components, our dedicated team ensures that every project is completed with meticulous attention to detail. This dedication has allowed us to evolve into one of the Pacific Northwest’s most trusted names in injection molding.
We Serve a Wide Variety of Industries
At H&H Molds, we take pride in delivering specialized plastic molding solutions across various industries, each with its unique challenges and requirements. In manufacturing, our precision-engineered components enhance efficiency in heavy machinery and tooling. We meet stringent regulatory standards for the life sciences sector, producing critical parts for testing, packaging, and medical delivery systems. Technology firms rely on us for prototyping and full-scale production, helping drive innovation. In the consumer goods space, we transform creative concepts into durable, high-quality products designed for everyday use. In agribusiness, our components support irrigation systems and farming equipment, ensuring reliability in even the most demanding agricultural environments. Whatever the industry, we deliver quality, precision, and performance tailored to our clients’ needs.
Your one-stop source for quality tooling and molded parts Made in the U.S.A. H&H Molds is a molding company you can trust.
Our highly trained staff of plastic molding experts, engineers, operators, and quality personnel ensures that we produce the highest quality parts.
Screw-Off Cores vs. Slides: Injection Mold Draft Requirements
Many injection molding thread failures don't start at the press. Thread failures often begin with CAD - when an engineer designs a thread profile without first considering the ejection process. The sequence of thread first, ejection second, is backward, and it's where draft mistakes get baked in. Screw-off cores (also called unscrewing cores) and side-action slides both handle threaded features, but they impose completely different draft requirements on→
How Injection Mold Teams Evaluate a Part Design Before Production Tooling Starts
Most pre-tooling DFM reviews are checklists with engineering letterhead. They confirm the part can be molded without breaking the tool, and stop there. That’s not the question you needed answered. A real review and a liability screen produce reports that look nearly identical — until 60,000 shots into production, when a weld line cracks through a structural zone nobody flagged. The gap is specific, learnable, and directly observable.→
3 Things Nobody Tells Your Team Before PPAP Submission
Many quality teams treat PPAP submission as the paperwork that follows a successful FAI. Get the part to print, run the first article, document it, submit. Logical sequence. Wrong mental model. FAI does confirm your part. However, PPAP is evaluated as a package by different reviewers against different criteria, with failure modes that differ from those for dimensional inspection. You can submit a dimensionally perfect part and still→
