Mp#14- Extruder problem. Intermittently stopping or turning too slow to recover shot size. They said that if they ran ABS material through the machine, it would not do this, only when the glass filled nylon was in it would it do this. I checked the extruder oil level and it appeared to be low. I added about a quart and a half to it.There was 1500 psi on the gage when it would mess up, when it was running fine it would operate around 700 psi. I separated the screw from the extruder and ran it at high speed for about 5 minutes to allow any crap in the lines or valves to flush out. I also checked to feel if the screw would turn by hand and it turned relatively easy. I reassembled and checked operation, it ran fine for 20 minutes then they shut it back down to run later.
Mp#10- repaired EOAT where some screws had come loose.
Mp#1- Replaced grease in lubricator tube.
Sean
Thursday, May 3, 2012
Wednesday, May 2, 2012
5.2.12 Sean Kearns
MP#17 Core Pump- Over Heating
When I came in it was out of the range of the thermometer so we shut it down to cool.
I placed a fan on it and wrapped it in a coil of water hose and pumped chilled water through it.
It came down to 120*F and we restarted it. I let it idle for about 30 minutes and it did not heat up at all. We then ran it for 5 hours until it reached 150*F. Then we shut it down again. Mike had already adjusted the compansator all the way out on it. After looking at it, I did not see a secondary relief valve for it on the valve stack. Everything I have read about systems overheating indicates that there are usually two relief valves used. The other thing I noticed was that the output stays on core set during most of the cycle loading the pump for 30 seconds each shot. I think that this is where the relief valve either needs to be added to it or the compensator adjusted correctly. When it cools down I will try to adjust it.
MP#15- Moving platen holes stripped out. Drilled and tapped 8 holes from 5/8-11 to 3/4-10.
It needs to be noted that I am beginning to see a trend of holes getting damaged in the smaller presses lately. Maybe we could get Jerome and the team leaders involved to identify some of the reasons this is happening and work out some solutions to prevent damage. Example: MP#13 had very good holes in it until last Friday when one of the clamps fell off during a run because it was set with too short of a bolt in it. It totally destroyed the threads when it ripped out. That hole will now have to be oversized.
Give me a call if there are any questions.
Sean
When I came in it was out of the range of the thermometer so we shut it down to cool.
I placed a fan on it and wrapped it in a coil of water hose and pumped chilled water through it.
It came down to 120*F and we restarted it. I let it idle for about 30 minutes and it did not heat up at all. We then ran it for 5 hours until it reached 150*F. Then we shut it down again. Mike had already adjusted the compansator all the way out on it. After looking at it, I did not see a secondary relief valve for it on the valve stack. Everything I have read about systems overheating indicates that there are usually two relief valves used. The other thing I noticed was that the output stays on core set during most of the cycle loading the pump for 30 seconds each shot. I think that this is where the relief valve either needs to be added to it or the compensator adjusted correctly. When it cools down I will try to adjust it.
MP#15- Moving platen holes stripped out. Drilled and tapped 8 holes from 5/8-11 to 3/4-10.
It needs to be noted that I am beginning to see a trend of holes getting damaged in the smaller presses lately. Maybe we could get Jerome and the team leaders involved to identify some of the reasons this is happening and work out some solutions to prevent damage. Example: MP#13 had very good holes in it until last Friday when one of the clamps fell off during a run because it was set with too short of a bolt in it. It totally destroyed the threads when it ripped out. That hole will now have to be oversized.
Give me a call if there are any questions.
Sean
Tuesday, May 1, 2012
4.31.12 Sean Kearns
MP#5 Robot- Mike evidently found a loose connection somewhere as the communication problem went away by the time I came in.
Mp#2- Replaced a blown fuse on the 24v4 circuit. They must have smashed a wire when the tool was set on 2nd shift? GMA-5A
Mp#16- Moving -platen has a thread hole damaged on the operator side, needs repaired when down.
Mp#17- Cores were not working on the mold. Both core switches were reading made all the time.
Checked it out and found that the jumpers were still in for core 1. Looked at what was done and already and tied the rest of it together. Wired switches for core 2 inputs, wired control switch in operator panel for core 2, removed necessary jumpers, checked operation. Put a core 2 legend on tghe front of the op station for techs to be advised.
Continued installing safety signs. Need some to put on the R2 fascia label station. I don't know where Mark got the ones for the classic fascia label station?
Have a nice day!
Sean
Mp#2- Replaced a blown fuse on the 24v4 circuit. They must have smashed a wire when the tool was set on 2nd shift? GMA-5A
Mp#16- Moving -platen has a thread hole damaged on the operator side, needs repaired when down.
Mp#17- Cores were not working on the mold. Both core switches were reading made all the time.
Checked it out and found that the jumpers were still in for core 1. Looked at what was done and already and tied the rest of it together. Wired switches for core 2 inputs, wired control switch in operator panel for core 2, removed necessary jumpers, checked operation. Put a core 2 legend on tghe front of the op station for techs to be advised.
Continued installing safety signs. Need some to put on the R2 fascia label station. I don't know where Mark got the ones for the classic fascia label station?
Have a nice day!
Sean
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