Contact Us | About Us Mail972-484-7300 MOLDING SERVICES INDUSTRIES SERVED QUALITY REQUEST A QUOTE Insert & Over Molding Over Molding, Insert Over Molding Process and Applications Overmolding is a process whereby one material is molded over a second material. The initial “substrate” is commonly the harder plastic of the 2 resins. Once the “substrate” is molded, it is then placed into another mold cavity and the “over mold” resin is injected to specific surface areas of the substrate to achieve the intended design and usage. This “overmolded” resin is typically a thermoplastic elastomer (softer feel), although there are other resin grades that also provide a softer feel. There are many applications where these types of products are chosen to be overmolded with a softer resin to aid comfort, ergonomics, cushioning, shock absorption, and functionality. Material Selection When overmolding plastic resins, proper material selection is critical – the two resins must be compatible. Resin suppliers provide guidance on which thermoplastic elastomers (the softer plastic) or other resin grades will bond to particular substrates dependent on which grade of resin is used to mold substrate. There are also different hardness criteria that is determined by the functionality or feel needed for an application. The range of durometers can be from 15 Shore A (very soft) up to 90 Shore A (hard but still offers some softness dependent on wall thickness). If the proper materials have been chosen, the two materials bond together chemically and/or mechanically. This process yields a strong finished piece with a long life. In many cases, this process can be less expensive than post-molding processes. Using Over Molding for Design Enhancement Meridian also overmolds metal components for added design enhancement, such as brass inserts or other metal components. Dependent on part design, this may be feasible where post molding operations such as ultrasonic welding is not viable. Overmolding processes lend itself to multiple industries and applications , such as: Toys Petroleum industry components Therapeutic tools Musical instrument aids Consumer filtering Toothbrushes Handheld tools Lawn equipment Electronic cases Computer mice Terms of Service Privacy Policy Sitemap About Us Our Services Molding Industries Served 11262 Leo Ln. Dallas, TX 75229 Tel: 972-484-7300 Fax: 972-484-7302 info@meridianproductscorp.com © 2021 MERIDIAN PRODUCTS CORPORATION, All Rights Reserved | Site created by Thomas Marketing Services