Processes involved during impregnation


The Sealant Degassing Process

Sealant Degassing Replenishes Oxygen In The Sealants And Discards Contaminants Such As Solvents And Water. This Results In Enhancement Of Pot-Life Stability. It Also Helps To Agitate The Sealant Once A Day For Ensuring Good Mixing Of The Catalysts In The Sealant Thereby Avoiding Any Possibility For The Catalyst To Settle.

The Sealant Transfer Process Is Also An Efficient Degassing Process. Sealant Degassing Is To Remove Moisture From The Sealant And Induce Oxygen Into The Sealant Bath For Stability. Due To The Vacuum During The Transfer Process, It Helps To Remove The Moisture From The Sealant Bath And Also Implement Purging Of The Sealant.

The Optimum Time For Sealant Degassing Is During A Weekend Or When Production Has Been Temporarily Stopped. If Production Has Stopped For More Than Three Days, Sealant Degassing Must Be Ensured On A Daily Basis. The Sealant Must Never Be Exposed To Heat. For Methacrylate Sealants That Comprise Catalysts, These Should Be Stored At Temperatures Of Less Than 20 Degrees Celsius.\

During Sealant Degassing, The Autoclave Lid Must Be Completely Closed. At Other Times, It Must Be Partially/Completely Open As Sealants Remain Stable In The Presence Of Air. It Is Recommended To Transfer The Sealant To And From The Storage Vessel At Least Once A Day.

The Basket Packing Process

The Proper Packing And Orientation Of The Castings In The Basket Play An Important Role In A Good Sealing Result. Good Basket Packing Ensures Deposit Free And Stain-Free Machine Castings Post-Impregnation And Also Ensures Optimum Consumption Patterns.

Some Important Points To Achieve Good Basket Packing Are As Follows:

1. Orient Most Tapped And Drilled Blind Holes Horizontally To Optimize Sealant Consumption, Prevent Resin Retention In The Holes After Draining Thereby Avoiding Resin Deposits, And Eliminate The Possibility Of Heat Marks In The Event Of A Steam Entrapment


 2. Remember That Airlock Or Air Entrapment During The Impregnation Process Will Impede Sealing And For Fully Machined Castings, Use Nylon/Plastic Separators Or Designed Fixtures To Protect The Machine Surfaces From Dents And Damages

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