• Service Client: N.S Plastic & Melamine Tableware Factory
• Machine Model: 300 tons split melamine press machine
• Machine Problem: Pressure dropping during running
• Service Way: Online communication
• Solving Time: 2 days

Case: When the split molding machine is pressuring, the pressure dropping to show from the oil gauge, the machine cannot press properly.

Now check one by one:

1. Check the outside surface of the machine, if there is any place oil leak: 

1-1. Main cylinder

1-2. Air-released hole at the backside of cylinder (Picture 1)

Picture 1

1-3. Air gauge (Picture 2 )

1-4. Pressure relieve valve (Picture 2)

Picture 2

2. If there is no oil leak from the above mentioned parts, then come to check the Pressure Relieve Valve.

Open the valve and check if the rubber seal is broken or not. If the rubber seal is broken, there will be oil leak, need to replace new seal.

If the rubber seal is not broken, then clean the valve by water and air gun, to clean the foreign matters out if have.

Then replace this valve back.

3. After replacing the Relieve valve, if the pressure still drops, then comes to check the Check-valve. Open the valve and clean it.

4. After replacing the Check-valve, and the problem still not solved, then comes to check the next part, Air-Released Valve:

It needs to remove this part properly and carefully, because of the oil seal is different shapes ( we have a video to show how to remove):

After removing this valve, and then run this valve at hand, we can see if there are any foreign matters inside to stop the valve closing properly, and the machine pressure drops.

Within 2 days (due to time difference between 2 countries), the problem of pressure drops of melamine tableware split molding machine solved finally, thanks for cooperation work from the melamine tableware factory’s engineers team.