Solid Modeling/Design

Solid Modeling/Design


CREDIT Fall 2014
08/25/2014 - 12/14/2014

Course Information

Section 002
MW 08:15 - 10:55
NRG3 3220
Bailey Jones

Office Hours

  • M W
    10:55 - 11:25
    Northridge Campus Building 3000, Room 3206

Course Requirements

Course Description:

This course builds upon the concepts presented in DFTG 1433 (Inventor) and DFTG 1429 (Solidworks). The Solidworks class is not a prerequisite, although it is helpful to take it before or concurrently with this class.  This class covers advanced CAD methods with an emphasis on cast and injection-molded part design.

For this class you should have prior 3D modeling experience and be comfortable drafting to ASME Y14.5 2009 standards. We will be using Creo 2 software to take your CAD expertise to the next level.  We will quickly review topics from your previous classes and apply them to this software.  Then, we will move past working with basic parts, assemblies and drawings, and begin learning more advanced techniques such as:

  • top-down design (skeleton modeling)
  • complex surfacing
  • cast and injection-molded part design (plastics design)
  • design standards for mass-production
  • prototyping methods, including the 3D printer we have in our department, that is, a Dimension FDM (fused deposition modeling) machine.

Many of the projects for this class will be open-ended and require student inquiry and individual and group design efforts to get the job done. Be prepared to do some up-front work such as planning and sketching out ideas in order to get started.

Prerequisites: DFTG 1433.


Please have a folder for collecting and organizing class materials and a USB drive for moving and storing digital files. Always have paper and pencil and basic drawing instruments available with you. You will need these to take notes and to explore conceptual designs.


Text Book:

Plastic Part Design for Injection Molding, 2nd Edition by Robert A. Malloy, HanserPublishers, ISBN:  978-1-56990-436-7

Individual chapters in PDF format are also available for purchase at:


Introduction, pp. 1-12

The design process and material selection, pp. 131-141

Shrinkage and Warpage, pp. 63-85

Cooling and Solidification, pp.86-89

Part Ejection, pp.89-108

Mechanical Behavior of Parts, pp.143-165

Beams, pp.214-247

Prototyping, pp. 285-325

Assembly, pp. 341-415

Course Subjects

Class Work Schedule (times are approximate):


Week 1:                      Introduction to Creo 2 software and review of CAD and drafting principles

Week 2:                     Configuration principles for Creo 2

Weeks 3-4:                Introduction to plastic design

Weeks 5-6:                Complex Surfacing

Weeks 7-8:                Top-down design

Weeks 9-10:              Advanced principles of plastics design

Weeks 11-12:            Snaps and beam calculations

Week 13:                   Manipulation of 3D STEP files and 2D IGES files

Weeks 14-16:            Design project

Student Learning Outcomes/Learning Objectives

Course Objectives:

  1. Introduce students to the software package,  Creo 2.
  2. Quickly move past basic modeling of parts, assemblies and drawings.
  3. Build an understanding of top-down design (skeleton modeling)
  4. Learn advanced modeling techniques such as complex surfacing.
  5. Learn injected molded part design principles.


Course Results:

Upon completion of this course, the student will have demonstrated the ability to:

  1. Create 3D part models of machine parts and associated hardware.
  2. Create 3D assemblies of machine parts.
  3. Add Views and Dimensions to machine drawings complying with ASME Y14.5 2009 drafting standards
  4. Design parts for high volume manufacturing.
  5. Understand and use injection-molding part design principles
  6. Create and document a custom designed plastic assembly

Grade determination

Grade Determination:

Daily Work 33.3%

Daily Exercises, class work and home work.

Quizzes 33.3%

There will be a quiz at the beginning of every class period. Quizzes may not be made up or turned in late. One low quiz grade for the semester will be dropped.

Design Project 33.3%

Students will create an original design for a plastic assembly and produce solid models and a portfolio quality set of engineering working drawings (detail & assembly) based on a project assigned by the instructor.

Final Grade Percentage:

90 to 100 =    A

80 to 89 =      B

70 to 79 =      C

60 to 69 =      D

59 & lower =  F

Late work will incur a 10 point penalty per class day.

a&E CAD department policies and procedures

Attendance/Incomplete Grades:

Departmental Policy on Absences: AECAD Departmental policy states that students accruing more than two (2) unexcused absences will/may be withdrawn from the course at the instructor’s discretion (in lieu of withdrawal the instructor may require that a student meet with the AECAD Department Program Coordinator to discuss attendance problems). It is the student's responsibility to inform the instructor when circumstances prevent him/her from attending class. AECAD instructors, at their discretion, may lower a student’s final grade for excessive absences or tardiness.

Incomplete Grades: The grade of “I” (for Incomplete) may be given by an instructor for a course in which a student was unable to complete all of the objectives for the passing grade. A grade of “I” cannot be carried beyond the established date in the following semester or session. The completion date is determined by the instructor, but may not be later than two weeks prior to the end of the semester. The TASK Force Chair will approve a change from “I” to a performance grade (A, B, C, D, F) for the course prior to the deadline. Consideration should be given to course load and job and family obligations when carrying an “I” grade into a new semester for completion. Grades of “I” that are not resolved by the deadline will automatically be converted to a grade of “F.” In extreme cases, permission may be granted to carry an “I” grade for longer than the following semester or session deadline; this must have the approval of the Dean.

Use of Recording Devices in Class

Students must recieve explicit permission from the instructor prior to recording class activities including lectures and demonstrations using any type of recording medium including cell phones, Google Glass, or other devices.

Use of Vaporized Nicotine Products

Use of vaporized nicotine products is prohibited in A&E CAD classrooms and hallways to ensure the right of students and faculty to not be exposed to second-hand chemicals that may be produced by these products.