Plastic Component Standards: A Beginner’s Guide

When sourcing a plastic component, it doesn’t matter whether you are an engineer developing a prototype for a special project or a purchasing agent given a part to source last minute. Either way, you need to make sure you have asked and answered all the questions related to your item to ensure you receive what is needed.
Knowing the basics helps.  What quantity do you need? Have you chosen a material? Do you have any other special requirements? … Read more

Injection Molding Tutorial: Videos

WHAT IS INJECTION MOLDING?
Every day of our lives, each of us is surrounded by plastic parts produced by the process of injection molding. Examples are everywhere, and include keyboards, tooth brushes, car components, toys, television components, make-up packaging and all kinds of products used in the medical industry. At Craftech Industries, we injection mold a large variety of plastic fasteners and custom parts.
We uncovered a video by Bill Hammack at the University of Illinois, … Read more

Acetal, Delrin AF and PTFE: Plastic Bearing Materials

Three of the most useful plastics for making bearings are Acetal, Delrin AF® and PTFE.  Acetal and Delrin AF® are both thermoplastics; meaning that these materials can be heated into a liquid form and then cooled into a solid retaining the shape of either the extrusion nozzle or the mold used to shape it. PTFE has the lowest friction constant of any plastic material. It is not a thermoplastic but it can be extruded.Read more

Special Plastic Material Highlight: TPU

Thermoplastic polyurethane* is a fully thermoplastic elastomer. It is elastic and melt-processable. TPU can be extruded, injection molded, and compression molded. Because TPU is a linear segmented block copolymer made up of hard and soft segments, it allows for a considerable number of physical property combinations. This diversity makes TPU an extremely flexible material, adaptable to dozens of uses. For even greater utility, the molecular weight, ratio, and chemical type of the hard and soft segments can be varied.Read more

Most Common Types of Screw Drives

There are literally hundreds of screw drives. In this article, we will take a look at a few of the most popular kinds. A screw drive is part of the design of a screw that allows it to be turned into place using a mating tool like a screwdriver or Allen wrench. Most screw heads come in a range of styles, including a Phillips fillister head or a slotted flat head, as well as in various sizes.Read more