Multiple Applications for Injection Molding
Injection molding is a very common manufacturing process employing a wide variety of raw materials. Chem-Trend has a long history of working with injection molders of polyurethane, thermoplastics, and rubber across many different applications, providing an extensive array of support products.
Solutions for Polyurethane Injection Molding
Injection molding is a common process for many polyurethane products. RIM stands for Reaction Injection Molding and is the process of injecting material by using a high-pressure impingement-mixed stream into a mold or cavity†. Other acronyms related to RIM are RRIM and SRIM. Chem-Trend has a vast amount of experience working with polyurethane injection molding systems and has developed a broad portfolio of products to support polyurethane molders using this process. To find out more about how our expertise and products can help you with your process, read our Polyurethane Injection Molding page.
Support for Thermoplastic Injection Molding
Injection molding is also frequently used for producing parts from both thermoplastic and thermosetting plastic materials. These materials – and related additives – are fed into a heated barrel, mixed, and forced into a mold cavity where they cool and harden to the configuration of the mold cavity. This method can be used to economically produce formed parts in large quantities.
Chem-Trend’s experience with plastic injection molders has led to a profound understanding of the challenges they face. Due to the many different raw materials and additives utilized, plus the frequent color changes and starts/stops of the process, the machines can become contaminated with carbon and other residue resulting in reject parts. The cost of the tools is a major investment, so protection of the tooling is important.
Chem-Trend’s many years of experience have led to our development of a range of high performance products for use by thermoplastic injection molders. To find out more about how we can help you protect your investment in equipment and improve your process, read our Thermoplastics Injection Molding page.
Release Agents for Rubber Injection Molding
The most prevalent molding method in the non-tire rubber industry is injection molding. A pre-masticated rubber compound is placed in the injection machine’s integral extruder and pumped through a relatively small orifice (mold bush) into the cavity feed (runner†) system. It then undergoes several elevations in temperature before it’s injected into the mold cavity. The process encompasses tough challenges for the mold release agent. To produce high quality parts efficiently, individual sections of the rubber injection molds – such as the mold entrance and mold cavity – need treating with a purpose-applicable mold release agent. To find out more about how our extensive experience working with injection rubber molders can be leveraged to help you improve your process, read our page on Rubber Injection Molding.
Rubber Injection Molding of Tire Curing Bladders
The injection molding process is not used to vulcanize pneumatic tires, but it is used in the manufacture of the inflatable curing bladders (membranes) used in the curing process of the tire. Chem-Trend supplies a range of water-based semi-permanent mold treatment/ coatings that help keep the mold and core free of mold fouling. These products also assist in the release of the finished bladders. These mold coatings are sold to the custom tire curing bladder producers as well as those tire producers who manufacture their own curing bladders. To learn more about how our experience working with injection molders has helped us develop high performing products for this application, read our page on the Injection Molding of Rubber. Or, to learn more about our extensive knowledge of, and suite of products for, the tire manufacturing process, read our main Tire Curing/Vulcanization page or contact us directly.