Injection molders fabricate parts with a range of complexities, from simple shapes to close tolerance precision parts. From medical equipment, computer and automotive parts to office supplies, toys and tools, injection molded parts are found in almost every sector of industrial and consumer industries. Read More…
Leading Manufacturers
LTM Plastics
Denver, CO | 303-592-9548For 50 years, LTM Plastics has been a leading manufacturer of injection molded plastics. When working with LTM Plastics, our customers can be assured that they are getting high quality products at a competitive price. We pride ourselves on our team’s communication and collaboration with our customers to meet their needs.
MSI Mold
Imlay, MI | 248-275-1978If you are in need of injection molded plastic parts that are of consistent quality, look no further than MSI Mold! We have over 30 years of experience in design, production, and tooling of custom plastic parts.
GSH Industries, Inc.
Cleveland, OH | 440-238-3009You won’t find better quality injection molded plastics anywhere else in the industry. We have built ourselves up from a small manufacturing company to a large company with decades of experience.
Britech Industries
Stuart, FL | 772-286-9278We may have started small, but today, we offer our products and services to companies around the world. We are dedicated to our customers, and our goal is to offer better service and pricing to any customer no matter the size.
Hi-Rel Plastics & Molding
Riverside, CA | 951-354-0258At R.M.Tool, we provide custom CNC Machining to help our customers solve some of their toughest machining needs. Our state-of-the-art CNC machining department is equipped with Milling, Turning and Wire EDM Machining Centers. We can process materials such as Steel, Stainless, Aluminum, and other Exotic Materials. We strive to always please our customers by always delivering quality products. From...
Molded Devices, Inc.
Tempe, AZ | 951-509-6918Call Molded Devices for a fast, competitive quote on plastic molding, plastic injection molding, and medical injection molding services. A wide range of standard & proprietary caps, covers & containers plus custom components for all your needs. We are your one-stop for design consult, quick prototyping, custom formulations & secondary operations!
Valencia Plastics
Valencia, CA | 844-574-2040Valencia Plastics is your leading full-service injection molded plastics manufacturer. Our products are made with various materials, including urethane, polyurethane, nylon, acrylic, and polycarbonate. We offer a wide range of sizes from miniature items up to 7 lbs. large parts. We are ISO 9001:2015 compliant. Industries we serve include electrical, military, automotive, aerospace, and...
Injection Molding Companies List
Injection Molding - Molded Devices, Inc.A few common examples of injection molding include catheters, contact lens containers, monitors, mop buckets, video game cartridges and screwdriver handles. Injection molding is primarily done with thermoplastics; however, a small amount of thermosets, biodegradable plastics and elastomers are also subjected to this process. There are many advantages to the injection molded process. Some of these advantages include high production rates and little need to finish parts after the molding is complete.
In addition, the cost per part is very low despite the high cost of tooling. Since injection molding can be used to produce very complex parts, injection molding is often used to produce parts that no other process can do. Other advantages of the injection molding process include the efficient use of materials and energy, precision-formed parts and a negligible amount of waste produced.
The most common type of injection molding machine are hydraulic oil machines, which use the force of hydraulic fluids to move the mold through the machine. Next in popularity is the toggle injection molding machine. Toggle machines use mechanical links to advance the mold in the machine. In addition, hybrid hydraulic/toggle machines are beginning to emerge in the injection molded plastics industry. Hybrid machines are used to eliminate some of the problems of other injection c molding machines, such as slow processing rates of parts and rapid wear and tear of machines.
No matter the machine, the injection molding process remains the same, beginning with heating the barrel section of the machine. Next, plastic pellets or granules are fed into a hopper where a screw pushes them to the heated barrel. In the barrel, the pellets or granules are heated to the melting point. The molten plastic material is then injected into the cavity of a split die chamber/mold, which is then clamped shut.
The plastic resin cools as water or other fluids circulate through the cooling system of the mold, extracting the heat. The injection molded part is held in the mold under high pressure until the part solidifies. The plastic part is finally ejected from the plastic injection mold, and the process begins again.
