Course Title

Course Title: Design Concepts for Molded Parts

8 Professional Development Hours/0.8 CEUs

Course Description: The Design Concepts for Molded Parts course provides an outline of basic design factors and a brief comment about their significance to part function, cost, and reliability. Each of these factors are discussed providing concise design guidelines and illustrated examples. Descriptions of pitfalls associated with common design errors demonstrate that there is more to part design than achieving the desired appearance and fitting to mating parts. To summarize the concepts, a list of the most critical concepts of part design is provided. The relationships between part design features and part performance in the field are also described in detail.

Overall Course Objectives:

Develop understanding of basic part design and how to determine service life requirements.
Become familiar with parting line and gate design in molded parts.
Learn the design of basic structures such as: ribs, bosses, undercuts, fillets and radii.

Course Content:

Lesson 1 - Introduction, Establishing Part Requirements

Objectives:

Understand part performance specifications and end use requirements in designing a plastic part.

Recognize useful guidelines that are included in the preliminary design & final design stages to ensure all aspects of design, inspection, processing and assembly are considered.

Identify conditions to consider in the safety factor for Design, Materials, Processing & Operating.

Lesson 2 - Parting Line Design, Gate Design, Bosses, Ribs, Fillets and Radii, Optimizing Part Thickness

Objectives:

Understand how the Parting Line and Gate design and location affect the plastic part.

Identify techniques used in designing of plastic parts in areas of ease of ejection, fillets and radii, de-gating and finishing operations.

Gain an understanding of optimizing part thickness & wall thickness variations.

Lesson 3 - Designing with Bosses, Designing with Ribs, Designing with Undercuts and Holes, Summary

Objectives:

Identify the molding problems inherent with blind hole designs that should be addressed in the molding design.

Gain knowledge of designing with ribs, undercuts, and holes.

List the most critical concepts of part design, and recognize the consequences of poor design.

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