Insulation Plug for Electrical Industry

Insulation Plug for Electrical Industry

Requiring a component that is both UL listed, and offers high electrical performance such as arc and track resistance, a manufacturer of power supplies contacted Woodland Plastics to utilize our thermoset molding services for their insulation plug components.

With four individual components varying in size, but sharing dimensional characteristics, Woodland Plastics molds the insulation plugs in a 4-cavity family mold using a 150-ton thermoset injection molding press. Parts are molded out of BMC 620 Red, a thermoset polyester material, and deflashed before being shipped to a customer plant in Mexico.

Project Highlights for Insulation Plug

Product Description

This insulation plug is used within a power supply application.

Custom Injection Molding Capabilities Applied/Processes

Mold Design

  • Managed Mold Build

Thermoset Injection Molding

Equipment Used to Manufacture Part

Single Cavity Mold
150 Ton Thermoset Injection Molding Machine

Overall Part Dimensions

Male Insulation Crimp:
Length: 4.750″
O.D.: Ø2.428″
I.D.: Ø1.875″
Male Insulation Pressure:
Length: 3.00″
O.D.: Ø2.428″
I.D.: Ø1.875″

Female Insulation Crimp:
Length: 3.375″
O.D.: Ø2.428″
I.D.: Ø1.875″
Female Insulation Pressure:
Length: 1.6562″
O.D.: Ø2.428″
I.D.: Ø1.875″

Tightest Tolerances

Concentricity of Ø.004″

Material Used

Polyester BMC 620



In process testing/inspection performed

Dimensional Inspection/SPC

Estimated Part Weight

275 Grams
210 Grams

162 Grams
105 Grams

Industry for Use


Standards Met

Customer supplied print, CAD Drawing

Product Name

M&F Insulation Crimp, M&F Insulation Pressure