Plastics Product Design by Paul F. Mastro

Author:Paul F. Mastro
Format: epub
ISBN: 9781118842737
Publisher: John Wiley & Sons, Inc.
Published: 2016-02-23T16:00:00+00:00

Most covers require information on them such as recycle codes, flammability ratings, manufacturer, and date codes. The least expensive way to do this is to mold them into the cover, but care must be taken on how the engraving is designed and where they are located. Raised lettering (lettering engraved into the tool, raised on the plastic part) is the easiest and most economical, but it will take up some space, which might be an issue in very tight fits. Lettering needs to be large enough to be legible, but small enough to minimize any sinks or distortion on the reverse side. Lettering that is sunk into the plastic part costs more in tooling. It is good practice to put this information on an insert in the tool so that as the information changes, a new insert can be made and put into the tool. On very thin covers (<2.5mm, <0.100″) these inserts can cause a “shadow” on the reverse side of the cover. This can be caused by a combination of the force of pulling the engraving out of the tool, the translucence of the plastic material and the difference in cooling between the insert and the tool itself. The best way to deal with this is to locate the engraving opposite a noncritical area.

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