Craftech is pleased to announce that we now offer plastic stamping products.  But what is plastic stamping?  Read on to find out!

What is plastic stamping?

The plastic tamping process involves the utilization of a conventional or high-speed punch press of varying tonnages as well as a set of dies that enable a shape to be punched from a strip of extruded plastic sheet or other non-metallic substance.  The plastic stamping products allows the manufacturer to create extremely thin products.  The plastic stamping process is often used to produce washers, gaskets, or other insulators but can be used to make a wide variety of flat shapes.

What are the dies used in plastic stamping?

Dies can perform many different functions and are used on everything from paper to stainless steel.  Craftech’s products are made using a compound die.  The compound die is composed of two different dies, one that punches out the inside diameter of the piece and another that cuts the outside diameter.  Compound dies allow for the plastic stamping to be done in one stroke.  The machine then uses high-pressurized air to blow away the excess plastic material.

 Why use plastic stamping?

Some of the advantages of compound die plastic stamping include:

1)    Accuracy

Plastic stamping is a great way to produce a large number of extremely precise identical parts.  As long as the die remains in good shape, there should be no variation between each stamped part in terms of dimensions or tolerances.

2)    Appearance

Since the part is blanked in one operation, the finished edges of the product produce a high level of uniformity.  The edges show none of the irregularities produced from the burnishing of many operations.

3)    Cost Efficiency & Speed

Plastic stamping produces a cost competitive and high precision part that can be manufactured in a timely manner to meet even the most aggressive schedules.   Some high-speed punch presses can cycle as fast as over 400 strokes per minute.  Yes, you heard that right-plastic stamping can produce over 400 plastic fasteners per minute.

What Are the Size Ranges for plastic stamping products?

To best summarize our plastic stamping capabilities in terms of part size, it is useful to do so in terms of a commonly stamped item such as a washer.

Thickness specifications can range from 5 mils (.005”) to .1875” for almost all available material types.  High-Density Polyethylene (HDPE) can be stamped up to .250” in thickness.

The min/max range for an outside diameter (o.d.) is typically .093” up to 12”

The inside diameter (i.d.) specifications will vary according to the specified o.d. but the general rule of thumb is that the i.d. should be greater than or equal to the thickness in order to assure part conformity.

Custom shapes are evaluated on a case-by-case basis and may require tooling charges.  Our Customer Service Team is always ready to assist in the evaluation of a print/spec to best accommodate your requirements.

What Materials Are Available?  Are Materials Other than Plastic Available?

Yes!  Craftech can stamp components from many non-metallic materials such as thermoplastics, NEMA grade thermosets & laminates, vulcanized fiber, and other paper materials.

Thermoplastics

Available thermoplastic materials include:

  • ABS
  • Acetal Homo (Delrin) & Copolymer
  • Cellulose Acetate
  • Flame Retardant Polypropylene (Formex)
  • Kapton Polyimide Film
  • High Density Polyethylene (HDPE)
  • Nylon, MDS Filled
  • PVC
  • Low Density Polyethylene (LDPE)
  • Nylon 6
  • Nylon 6/6
  • Polyester Film (Mylar, Melinex)
  • Polypropylene
  • Polystyrene
  • Polycarbonate (Lexan)
  • Teflon (TFE, FEP, Glass or Carbon-Graphite Filled)
  • Ultra High Molecular Weight (UHMW) Polyethylene
  • Valox
  • Vinyl, Rigid & Flexible

NEMA Grade Thermosets & Laminates

Available NEMA Grade materials include:

  • Canvas Phenolic (NEMA C, CE, CYB, etc.)
  • Glass Phenolic (NEMA G-3)
  • Fire Retardant Phenolic (NEMA FR-1 & 2)
  • Glass Melamine (NEMA G-5 & G-9)
  • Fire Retardant Paper Epoxy (NEMA FR-3)
  • Glass Silicone (NEMA Grade G-7)
  • Fire Retardant Glass Epoxy (NEMA FR-4, 5)
  • Glass Epoxy (NEMA Grade G-10,G-11)
  • Glass Polyester (NEMA GPO-1, 2, 3 & 4, etc.)
  • Linen Phenolic (NEMA L, LE, LYB, etc)
  • Paper Phenolic

Vulcanized Fibre

Available grades of vulcanized fibre are:

  • Bone Grade
  • Commercial Grade
  • Electrical Grade (Fish Paper)

Other Paper Materials

Other paper materials include:

  • Duroid
  • Kraftpaper
  • Vellumoid
  • Nomex Aramid Fibre
  • Pressboard
  • Rag/Mylar Laminates
  • Ragpaper
  • TBS Fibreboard
  • Vegetable Fibre
  • VHR Fibreboard
  • XL Fibreboard
  • ThermaSeal
  • Garlock

Have you used plastic stamping components in the past?  Are stamped washers, gaskets, or other insulators needed in your application?  Let us know in the comments below!

 

Interested in pricing on plastic stamping products?  Request a quote now!

4 responses to “Everything You Need to Know About Plastic Stamping

    1. Robert – Thanks for reading the Craftech Industries’ blogs. The answer depends on what you mean by “work with.” It is easier to stamp, melt and flex than metal, and typically weighs less. It can also be more resistant to corrosion and chemical attack. If you’ll clarify I can better answer your question.

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