Thermoset Molding Video and Guide

Thermoset molding video shows how a molded part is made to:

• Resist high heat and maintain physical strength properties
• Chemical resistance
• Electrical insulation (arc & track resistance)
• Dimensional stability

Industries Served

Electrical Distribution, Automotive, Major Appliance, Commercial Lighting, Specialty Parts, Oil & Gas, Medical

Materials Technology

Phenolics – Injection/Compression, Glass Filled Phenolics Injection/Compression, Glass Filled Polyesters – Injection/Compression, Bulk and Sheet Molding Compounds – (BMC), Sheet Molding Compound – (SMC), Structural Composites, Ureas, and Alkyds.

Watch this Thermoset Video while it presses, lightly cleans and uses an end of arm to move the parts to the conveyor for cooling.

Thermoset Molding Guide Summary:

• Molded Part Tolerances: +/- 0.003″ per inch, additional +/- 0.005″ when measuring across the mold parting line.
• Material Shrinkage: 0.001″ to 0.015″ per inch depending on the grade of thermoset material.
• Typical Nominal Wall Thickness: 0.050″ to 0.125″ with less than 25% variation.
• Draft Angles: one degree/side on side wall sections, two to three degrees/side on deep barriers and bosses.
• Radii and Fillets: 25% to 75% of nominal wall section, minimum of 1/64″ radius.
• Rib Thickness: 50% of nominal wall section
• Rib Height: Three times rib thickness
• Boss Height: Less than two times the outside diameter of boss
• Boss Draft Angle: Three degrees
• Hollow Boss Wall Section: Two times inside diameter of boss
• Hole Depth: 2.5 times hole diameter (when compression molding)
• Hole Edge Locations: Twice the nominal wall section from part edges or other holes.
• Hole Diameter for Inserts: 0.001″ to 0.002″ less than insert diameter for small inserts, increase slightly for larger inserts.
• Hole Wall Thickness for Inserts: 0.8 times insert diameter for 0.5″ diameter or less inserts, 1.5 times insert diameter for larger inserts.
• Insert Type and Material: Diamond knurled brass or aluminum.

Full Thermoset Molding Design Guide

https://posts.gle/N4gNL1