Injection molding is the quiet engine behind everyday products; from phone cases to car interiors and it all traces back to a 19th-century. In this guide we break down how an injection mold actually works, why the reciprocating screw changed everything in the 20th century, and what sprues, runners, and gates are doing inside the tool. We’ll also cover the precision behind repeatable parts and the small clues that help you spot molded features in the wild.

Choosing the right molding method is critical in manufacturing durable, high-performance plastic parts. This article explores the importance of compression molds including why they remain a trusted solution for producing cost-effective, long-lasting components across industries. From their ability to shape thermoset materials under high pressure to their unmatched durability and precision, discover what makes compression molding a standout process in modern manufacturing.