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Pressure Drop of Melamine Tableware Molding Machine

Pressure Drop of Melamine Tableware Molding Machine

June 23, 2020
  • Service Client: N.S Plastic & Melamine Tableware Factory
  • Machine Model: Split melamine molding press machine 300Tons
  • 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 machines, if there is any place oil leak: 1-1. Main cylinder

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

Air-released hole of melamine tableware molding machine

Picture 1


1-3. Air gauge (Picture 2 )

1-4. Pressure relieve valve (Picture 2)

Pressure relieve valve of melamine crockery molding machine

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.

melamine tableware molding machine


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

Split melamine molding press machine


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):

300 tons Split melamine molding press machine


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.


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