LOGIC designworks
Design Process Manufacturing Plastics Design Resources

Injection Molding


Plastic parts & Enclosures

  • High Setup Cost
  • Low Part Cost
  • 6 week Turn Around
  • Stringent Design Requirements

Injection molding is the main way to produce plastic parts. It's most effective for complex parts in medium to high volume. While the upfront cost is usually in the $4,000 - $20,000 per component. The part cost is extrememly low, around $1-5.

More Info: http://en.wikipedia.org/wiki/Injection_molding
Design Guide: http://www.plastics1.com/CIM/DesignGuide.php

Injection Molding Tool



Metal Enclosures & components

  • Subtractive Process
  • High Part Cost
  • Quick Turn Around
  • High Precision

Machining offers low set up cost and a quick turn around for metal parts and some precision plastic components. The modern systems use computer controlled CNC machines that build the part automatically from the 3D CAD file.

More info: http://en.wikipedia.org/wiki/Milling_machine
Machining Design Guide: http://en.wikipedia.org/wiki/ Design_for_Manufacturability_for_CNC_machining

Machined Housing



Low volume Enclosures and Parts

  • Strong Parts
  • High Labor cost
  • Post production work needed
  • Mid level part cost

Metal and Urethane Enclosures that need to be strong

Casting Design



Quick Mockups & Proof of Concept

  • Low Setup Cost
  • High Part Cost
  • Short Turn around time
  • Low Precision

Examples of Prototypes

Thermo Forming


Packaging & Formed Sheets

  • Mid to Low Setup Cost
  • Low Part Cost

Example of Thermoforming



Research & Industry Trends

  • High Setup Cost
  • Low Part Cost
  • Low Accuracy
  • Rough Surface Finish

Extrusion Example



Strong Fixtures & Paneling

  • High Setup Cost
  • High Part Cost
  • Long Turn Around
  • High Strength

Fiberglass & Composite Examples

Sheet Metal


Electronic Enclosures & Fixtures

  • Low Setup Cost
  • Mid Range Part Cost
  • Short Turn around time
  • Limited Styling

Sheet Metal Example