13 Feb 2020
The metal plates of a plastic injection mold

The Plastic Injection Molding Process

The plastic injection molding process The basics of the plastic injection molding process: melted plastic injects into a metal mold. The plastic material cools inside the mold and hardens into the finished product. The product releases when the two halves of the mold separate and the plastic ejects.  How does injection molding work? Put simply, […]

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10 Dec 2019

Overmolding: A Beginners Guide

What is an Overmold?   Overmolding uses two or more different materials to create a single product. For example, overmolding can create a plastic toothbrush with a soft, comfortable handle. The central, usually harder piece, is called the substrate, while the outer material is known as the overmold material.   When creating an overmolded piece, […]

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25 Nov 2019

Is 3D printing cheaper than injection molding?

Is 3D printing cheaper than injection molding?   Injection molding is cheaper than 3D printing if you produce more than 100 parts. While the cost per unit using 3D printing stays relatively unchanged, the price for injection molding becomes dramatically better the more pieces you manufacture with your mold. There are, however, many factors that […]

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19 Nov 2019
Plastic raw material in granules against the background of Chemical Laboratory and reagents

What Materials Are Used In Injection Molding?

Materials used in injection molding are plastics, specifically thermoplastics. There are hundreds of thermoplastics, but the most common thermoplastics used in injection molding are: Polypropylene Polyethylene Acrylonitrile Butadiene Styrene (ABS) These three thermoplastic materials are used all the time. They are cost-effective, durable, and can tolerate the stresses of constant use. You likely use products […]

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23 Sep 2019

What is CNC Machining?

What is a CNC Machine and How Does it Work?   CNC Machines are some of the most important tools used in modern manufacturing. They can perform an incredibly diverse range of tasks and are essential for product design. Because of the complexity of CNC machines, it can be easy to get lost when trying […]

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26 Aug 2019

An Introduction to Hot Runner Systems in Injection Molding

    Since its inception in the 1960s, to its acceptance in the 1990s, the hot runner system has challenged tradition across the plastic injection molding business. With their increased cycle speed and decreased waste, hot runners are an attractive solution to many looking to diversify their injection molding process.   What is a hot […]

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09 May 2019
plastic parts made from plastic injection molding

A Rookie’s Guide to Plastic Injection Molding

From toy LEGO blocks to space shuttle turbine blades, plastic injection molding touches our lives every day. But what is plastic injection molding? Why is it so popular? And is the process right for your manufacturing needs?   What is injection molding? Injection molding is a common manufacturing process for producing large volumes of parts […]

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15 Feb 2019
american flag

Keeping it at Home: What Is Manufactured in the U.S.?

Rex Plastics, is glad to share the manufacturing landscape with many businesses that don’t just sell here; they support local employees and communities by keeping their operations here at home like we do with our plastic injection molding. We’re one of the few plastic injection molding companies to keep our operations on American soil Why Buy […]

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