Epsilon Industries, Inc.

Made in the U.S.A

Simple Part?

Epsilon Industries, Inc.
Plastic Injection Molding
The Low Cost Alternative to Rapid Prototyping
INJECTION MOLDED PARTS STARTING AT $1480 INCLUDING TOOLING CHARGES

Simple Part

What is a simple part?

A simple part is a part that can be injection molded from a mold that:

Has no undercuts, eliminating the need for slides or pulls. We do make molds with these features, but additional costs are incurred.
Can be CNC Machined using cutters from .0625 in diameter whose length is no longer than 3-6 times the diameter (see table)
Does not require EDM processes because of small details or sharp inside corners in mold. Note: If your part has sharp outside corners we can still make it, but corners will have a radius. We can EDM features as necessary, but for additional cost.

Many very complex parts can actually be simple by the above stated parameters. Other parameter requirements are detailed on the parameters page.

Cutter Size	Maximum Length
0.062	0.180
0.078	0.350
0.093	0.375
0.125	0.500
0.1875	0.625
0.250	1.250
0.3125	1.625
0.500	2.000

Some Considerations:

Shrinkage--The molding process involves injecting hot plastic into a mold cavity and allowing it to cool. As it cools, the plastic shrinks. While we can estimate shrinkage fairly well, different areas and/or materials may shrink a little differently. If you change materials, the size may vary slightly with the new material. If you anticipate several material types and size is critical, consideration should be given to what shrink factor to use. If your part involves very close tolerances, please so indicate when you supply us with a model.
Engraving--Simple engraving in which text, symbols, etc. stand up on the part, can usually be included at no extra cost. The engraving geometry must be supplied in the CAD file as curves on the surface of the part. Minimum cutter size for engraving is .031 diameter. This will provide very attractive results and is great for part identification, revision numbering, switch labels, web site, etc. Remember that the engraved features will be raised in the part. Make sure that there will be no interference issues when engraving is specified.