This is a custom spinneret plate made using two processes together. CNC machining cut the array of counterbored holes across the plate, and laser cutting then cut a 0.02mm slit through the bottom of each hole. A spinneret is the part that turns molten polymer into fiber. The melt is forced through the plate, and the shape of each opening decides the shape of the thread that comes out. There are hundreds of these openings on one plate, and they’re small, which makes a spinneret one of the harder parts to machine well.

Neither process does the whole job on its own. A cutting tool machines the holes quickly and accurately, but it can’t cut a clean 0.02 mm slot without leaving a burr or drifting off size. A laser cuts the fine slot cleanly, but using it to remove all the material would be slow. Machining the holes on a CNC and cutting the slots with a laser uses each for what it does best: the CNC for the bulk, fast and accurate, and the laser for the fine slot, clean and to size.

The slot is where the tolerance lives. At 0.02 mm it’s finer than a human hair, and it has to come out the same across the whole plate, or the fibers won’t spin evenly. A burr or a rough edge on the slot drags on the melt and turns into a flaw in the thread, so the slot has to be both the right size and clean.

Part type: Custom Spinneret Plate

Material: Stainless Steel

Machining Process: CNC Milling + Laser Cutting

Surface Finish: As-machined, slit edges smooth and burr-free

This spinneret is machined from stainless steel. It holds up to the heat and pressure of spinning and resists corrosion, but it isn’t easy to cut to this level of detail. We make spinnerets and other fine-tolerance parts, combining CNC machining with laser cutting where the detail calls for it.

Every slot gets checked, because a plate with even a few slots off-size or rough is no good in use. We measure the slot width under magnification and look at the edges.

The slot in the image measures 0.020 mm, with smooth walls and no burr. That’s the finish the fiber needs.

We provide custom CNC machining services for low-volume production and rapid prototyping for design verification.  Click Here to Upload Your CAD Files