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Types of Injection Molding Machines: Hydraulic, Electric, and Hybrid Compared

Justin Brown September 3, 2026 No Comments

If you’ve gotten quotes from two injection molding companies, you may have noticed something. One mentions a hydraulic machine. The other mentions an electric machine. You might wonder if that…

Insert Molding vs. Overmolding: What’s the Difference?

Justin Brown September 3, 2026 No Comments

Combining metal with plastic takes a different process than adding a soft grip to a hard plastic part. Both are common in insert molding and overmolding, but they solve different…

What Are the Different Types of Plastic Injection Molds? (Plate, Runner & Cavity Guide)

Justin Brown August 27, 2026 No Comments

Not all injection molds are built the same way. At Freeform Polymers, we’ve seen how the type your part needs can change your tooling cost by thousands of dollars. That…

What Is a Draft Angle in Injection Molding? (And How Much You Actually Need)

Justin Brown August 27, 2026 No Comments

Ever gotten a design review back with a flag that says “insufficient draft”? You had no idea what that meant. It’s one of the most common notes molders give on…

How Do You Calculate Injection Molding Cost?

Justin Brown August 20, 2026 No Comments

You have a part idea. You don’t know what it will cost to make. That’s the moment most first-time customers reach out to us at Freeform Polymers. They want to…

Why Do Plastic Injection Molds Cost So Much?

Justin Brown August 20, 2026 No Comments

You ask for a quote on a plastic part. The number that jumps out isn’t the part price. It’s the mold. Why does a chunk of steel cost more than…

Why Injection Molding Isn’t Always Right for Large Parts (And What to Use Instead)

Justin Brown August 13, 2026 No Comments

Not every large plastic part belongs in an injection mold. Some warp during cooling. Some cost more to tool than the finished part can justify. And some simply won’t fill…

When Did Plastic Injection Molding Start? A Brief History of the Process

Justin Brown August 13, 2026 No Comments

Plastic injection molding feels like a modern industry. But it’s over 150 years old. The first machine was patented in 1872, decades before plastic became a household word. If you’ve…

How Does an Injection Molding Machine Work? Every Part and Step Explained

Justin Brown August 6, 2026 1 Comment

Have you ever wondered how a handful of plastic pellets turns into a phone case, a bottle cap, or a car part? One machine does all of it, using the…

What Is DFM? Design for Manufacturing Explained

Justin Brown August 6, 2026 1 Comment

Design changes cost more the later you make them. A tweak on paper is cheap. The same tweak after the mold is cut is not. That’s the idea behind DFM,…

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