10.14.07

Two common issues for the 1st time three roll mill users

Posted in Set Up at 10:38 pm by Administrator

  1. Cooling – the rollers are cored to take cooling water. If you plan to use the machine consecutively 30 min or less, you do not even need to connect it. If you do need it, pleas use automotive antifreeze coolant and use a small immersion pump to pump water into the rollers.
  2. Leaking from the side. There are normal two causes for leaking at the side.
     

    1. One is that the rollers are not parallel. The narrower side will have past coming out. Please adjust accordingly.
    2. The end plates do not fit on the rollers tightly. The rollers are machined to +/- 0.002-0.005mm tolerance concentricity. The end plate arc are ground to about the same. However they will not exactly match. At the same time, when the roller gap changes, the gap between the roller and end plates will change too. When you set up, please use one hand to press the end plate against the roller and then gently tighten the screw to fix end plate position. Do not over tighten the end plate screw. After a few months’ use, the end plates will match roller very well.

06.20.06

Three Roll Mill Set Up

Posted in Set Up at 4:43 pm by Administrator

In response to a question from a customer in Europe, I am sharing how I do the initial set up for three roll mills.

Different people have different ways of setting up three roll mills. Here is my experience and worked for me.

During the initial set up,  first separate the discharge rollers by 2-3 mm, then adjust the gap of feeding rollers to about 0.050mm to 0.075mm. Then put a little paint on the rolls (about 2 cm wide) and check if the paint is running smoothly without moving to either end. Adjust the roller gap on one side if needed. Until the paint stays on the roller in one place for about 1-2 minutes, then start setting up the discharge rollers. Stop the machine and set the gap of discharge rollers to about 0.025mm - 0.075mm, then start the machine with a little paint on the feeding rollers (again no wider than 2 cm). The paint should go straight through the rollers. If needed, adjust the gap of discharge rollers on one side if needed. Generally speaking, if the gap on one side is closer than the other, the paint will move towards the smaller gap side. If the rollers are perfectly parallel, the paint should go straight.

What is your experience?