Henkel Engineer Provides Solution after Analyzing Process Considerations

A multinational customer manufactures high voltage integral horse power motors of 150 to 3000 HP rating in India. Customer used a rtv silicoone sealant to seal the end shield of the motor. However, the seal failed to perform consistently and failed to withstand IP 65* tests. During a plant survey, Henkel Application Engineer analyzed that the operator takes close to 15 min to dispense the silicone on the flange area, by which time the silicone would have started to skin over this leads to insufficient bonding on the mating flanges and improper sealing.

Henkel Engineer Provides Solution after Analyzing Process Considerations
The high voltage IHP motors of 150 to 3000 HP rating in India used an RTV silicone sealant to seal the end shield of the motors. However, the seal created by this sealant failed to perform consistently and failed to withstand IP 65* tests. During a plant survey, Henkel Loctite 518 Gasket Eliminator an anaerobic Flange sealant was recommended for this application. It fills all imperfections of cast iron body and end shield. It does not cure until the application on the entire flange area is complete and end shield is assembled thereby eliminating the limitations with previous application method. The assembly passes IP 65 test - eliminating rejections and rework.

Fast Cure Speed is the Key to Improvements
Grommets, specialty clamps and adhesives are often used to secure the lead wires. Due to the small size of the motor, the grommet or clamp were undesirable. Lin Engineering has to find an optimum method for securing the lead wires. Finally they choose Loctite 352 light cure adhesive for this application. The operator manually dispenses a bead of Loctite 352 over the wire connections on the stator wires using a hand held syringe dispenser; after the adhesive is dispensed, the coated motor assembly is placed on a light cure conveyor where a 30 second exposure to light cures the adhesive. After light cure, the lead wire is fully reinforced and immediately ready for subsequent handling.

Meets High Torque & Temperature Requirements, Saves Assembly Costs

A leading machine tool accessories manufacturer use shrink fit to assembled torque motors for Bio-Directional Tool Turret, but the shrink fit of assemblies involves heating costs and time, additional labor and lower reliability,
customer wanted to improve on these. Loctite 648 Retaining Compound was successfully tested for stall torque test at 120 deg C and savings of more than 28% on heating costs and labor for customers.