J.Platt
Mechanical
- Nov 6, 2023
- 1
Hello,
I have an application where we use large centrifugal industrial peelers containing 24 gritted, long, round shafts installed in a rotating cage. These rotating shafts peel vegetables centrifugally and turn 40-60 revolutions per minute. This is a water-based process with vegetables entering the top and the peelings falling out the bottom and the veggies go out a conveyor. The vegetable peel has acidic properties along with with tannic acid and the water has a pH of 5. The rolls experience very heavy vibration and tortional stress. During the off-season, these rolls are commonly stored outside directly in the sun. Our company buys these roller shaft pre-gritted. It seems the glue formulation from the glue supplier changed and now the performance of the rolls has worsened. The grit used to last 40 to 50 days. With the new glue formulation, the grit on the roll only last 4 to 6 hours. Therefore, my objective is to develop a new glue formation to apply, glue and set the sandy grit onto the stainless steel rollers in my own shop. Given the requirements of shear durability, chemical/water resistance I know I need to go with a 2-part Epoxy. Can someone recommend my required pre-application steps and which brand of flu I should check out?? Also, any ideas on automating the application of glue to the shafts? I will be gritting thousands of these rollers annually for our harvest. Thanks. JP
I have an application where we use large centrifugal industrial peelers containing 24 gritted, long, round shafts installed in a rotating cage. These rotating shafts peel vegetables centrifugally and turn 40-60 revolutions per minute. This is a water-based process with vegetables entering the top and the peelings falling out the bottom and the veggies go out a conveyor. The vegetable peel has acidic properties along with with tannic acid and the water has a pH of 5. The rolls experience very heavy vibration and tortional stress. During the off-season, these rolls are commonly stored outside directly in the sun. Our company buys these roller shaft pre-gritted. It seems the glue formulation from the glue supplier changed and now the performance of the rolls has worsened. The grit used to last 40 to 50 days. With the new glue formulation, the grit on the roll only last 4 to 6 hours. Therefore, my objective is to develop a new glue formation to apply, glue and set the sandy grit onto the stainless steel rollers in my own shop. Given the requirements of shear durability, chemical/water resistance I know I need to go with a 2-part Epoxy. Can someone recommend my required pre-application steps and which brand of flu I should check out?? Also, any ideas on automating the application of glue to the shafts? I will be gritting thousands of these rollers annually for our harvest. Thanks. JP
