At ESPE Manufacturing Co., we provide high-quality electrical insulation materials and fabricated plastic parts. In addition to stocking and distributing a large inventory of non-metallic materials, we offer custom fabrication capabilities ranging from prototype to full production runs.
Stamping is one of our fabrication specialties. We produce a wide range of stamped products made from electrical insulation and barrier materials—including ITW Formex®, ITW Statex®, and Nomex®—as well as from other non-metallic materials such as plastics and aramid papers.
Stamping Process for Non-Metal and Plastic Parts
Stamping is a manufacturing technique that involves using a custom-designed punch and die block set to punch out parts from the workpiece. The stock material—typically in strip or coil form—sits in-between the punch and the die block. Once the material is in position, the punch forces through it into the die block, stamping out the part.
ESPE’s stamping operations include slitting the material down, then feeding it into the presses where the stamping takes place at 50-200 strokes per minute. In a single press stroke we can produce up to 5 blanked parts.
When selecting a plastic or other non-metal material for a stamping operation, it is important to keep in mind a few factors to ensure optimal part performance and production. These considerations include the material’s:
- Mechanical, electrical, magnetic, and thermal properties
- Performance characteristics, including durability and performance under normal and high-stress operating conditions
Careful consideration should also be taken for other design elements, including ensuring the design fulfills the absorption, compression, and alignment requirements of the application.
A wide range of insulation materials are used in non-metal stamping operations, including:
- ITW Formex® and ITW Statex®. These materials are suitable for applications with a high electrostatic discharge (ESD) profile. They are effective barriers to static electricity since they prevent its build-up and dissipate it. They are a good choice for parts used in computers, consumer electronic devices, medical equipment, solar energy components, and telecom appliances.
- Nomex® paper. This material is used in flat-panel TVs, tablets, and mobile phones due to its excellent electrical and thermal insulation properties.
- Fishpaper/vulcanized fiber. This material is lightweight and performs well in environments with alternating high and low temperatures. Some of the items commonly made using fishpaper include circuit breakers, gaskets, and bushings for motors.
Two Advantages of Plastic Stamping for Electrical Barriers and Insulators
There are a couple of advantages to using stamping for manufacturing non-metallic parts and products, such as electrical barriers and insulators. These advantages include:
- Higher accuracy and tighter tolerances. Depending on the state of the die, the stamping process can produce high volumes of identical parts with very strict tolerances.
- Greater reusability and flexibility. Although the initial process of producing a custom die set is time-consuming, once a die is ready, it can be used for multiple production runs or swapped out quickly for different parts. At ESPE, these process qualities allow us to offer our customers a typical lead time of 5–15 days with emergency and rush options on a case-by-case basis.
Applications of Stamped Electrical Barriers and Insulators
Due to its numerous advantages, stamping finds application in a wide range of industries. Industries that utilize stamped electrical barriers and insulators include:
- Defense and military
- Dental and medical
- Food and beverage
- Machine tools
- Oil and gas
- Renewable energy
Stamped Insulation Solutions From ESPE Manufacturing
Stamping is a quick and cost-effective method of manufacturing high volumes of high-quality non-metallic parts, including electrical barriers and insulators.
As an industry-leading supplier of electrical insulation and barrier materials, ESPE has the knowledge and experience to fabricate custom parts from these substrates. Our stamping capabilities allow us to form parts from these and other non-metallic substrates.