The making of a knife sheath of this type is a very difficult job to do well. It takes state-of-the-art tooling and many years of experience.
The product is made by the extrusion process where molten plastic is forced through a die. A die is a thick piece of steel with an opening cut through it in the shape of the product’s profile. In our case the product comes out of the die slightly V-shaped. It then goes through another piece of tooling called a calibrator or sizer. It takes the still pliable extrusion and helps form, cool and close it. You can’t make a high quality part without one, particularly if it’s thicker. Most competitors skip this costly piece of tooling and instead rely on more elementary methods. They use simple fixtures for shaping and blowers for cooling. They prefer to run an extrusion that is thinner because it’s easier to do.
The plastic we use contains no fillers like calcium carbonate and talc. Some may use them to lower their resin cost but you can’t afford to have them in a product that needs to withstand stress.
Glen F. Brandis
