Course Title

Course Title: Reaction Injection Molding

8 Professional Development Hours/0.8 CEUs

Course Description: The Reaction Injection Molding (RIM) Course describes what the RIM process is and explains what the steps are in a typical RIM molding sequence. The different types of polyurethane materials produced by this manufacturing technology are identified, including SRIM and RRIM. Typical equipment requirements for RIM production, such as metering and dispensing systems, mixing heads and part tooling are explained. Design recommendations for many of the features in parts manufactured with RIM are given (details such as bosses, rib, inserts, part draft and wall thickness). The basics of RIM mold design are addressed, such as venting, tolerances and gating. The program ends with an explanation of the post molding processes most frequently required with RIM composites.

Overall Course Objectives:

Identify the raw materials and equipment used with RIM.
Gain an understanding of part design for RIM.
Differentiate between RIM and injection molded parts.

Course Content:

Lesson 1 – Introduction, RIM Chemistry

Objectives:

Identify the most typically associated materials used in the RIM process, and determine the most suitable applications to consider RIM.

Recognize the structural composite polyurethane system (SRIM), and explain the applications for which it is used.

List the benefits of “Soft Touch” that is used in the conventional RIM process.

Lesson 2 – Equipment for RIM, RIM Molding Process

Objectives:

Develop an understanding of the basic elements of a RIM molding system.

Identify types of mix heads and presses used for RIM processing.

Outline the eight steps of the RIM molding process.

Lesson 3 – Design for RIM

Objectives:

Recognize the aesthetic, functional, and cost considerations of material selection.

Identify the part design considerations of the RIM process.

State the basic considerations for design of tooling for RIM production, and recognize the design issues.

Lesson 4 – Post Molding Operations

Objectives:

State the advantages in the RIM process that relate to the post molding operations.

List cumulative benefits to the in-mold coating system.

Identify conventional fastening methods used for RIM parts.

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