MP24 – Started up the machine and the top core cylinder would not pull with 2000psi. Lowered the thermolator temp to 120 degrees. Increased cycle time to 36 seconds. Lowered the pack and hold pressure to 350psi. Went from 12 sec on cooling time to 16 sec. Fred came out and looked at the mold and saw the top core was dragging on its way out, he also noticed that it was very dry. He sprayed a healthy dose of injector rod lube in and around both cores. The cores have pulled ever since. Something was binding in the top core tooling. To Temporarily solve the core push back problem on injection we changed the sequence to # 3 and set the cores first to allow time for cores to fully pressurize, added a sprue break function, and used a relay to break the output to the core set, using the n/c contacts,.to capture full pressure against the cores. The input for inject unit forward confirmed, 137, is used to energize the relay and remove power to the valve prior to inject. Clamp high pressure might be a better choice if a mold can’t use a sprue break but n/o contacts would have to be utilized, I believe the high pressure switch is signal off when tonnage is achieved.
MP10 – Branson 910 Sonic Welder – Worked on it off and on last two days. This is what I have learned. Alignment is critical, the horn should push evenly around the part flange and bottom surface should be parallel with the part flange. Adjusted the stroke so that it would travel far enough to weld but not far enough so the horn would bottom out on the lower part if the top part was missing. Slowed the down speed so the other controls and settings had time to react. Reduced the down pressure to 20psi. Increased the trigger pressure setting to 6, to allow time for our flimsy top part to settle, before welding. Tuned the Sonics by depressing the test push button for 5 seconds, then while holding the test button in, adjusted the trim pot above to read the lowest digital number on the read out. Here’s where settings ended up: Weld Time was at 2.000, Hold Time was at .300, AB Delay was at .050, AB Time was at .050. We may have power supply issues since we can’t seem to get the settings back to original. I was informed today, as of September of this year, Branson will no longer support this piece of equipment because of obsolescence.
MP17 seems to be leaking from everywhere and sooner or later we will have to deal with it.
The Eagle baseplate mold is back and needs to be plumbed and wired. I will start with the plumbing and see how far I can get.
Thanks and have nice day, any questions please don’t hesitate to call. 3/11/10.
Mark McKee
Technical Specialist
Oreck Manufacturing Company
mmckee@oreck.com
PH 931.646.7856
CELL 931.644.5289
FAX 931.646.7851
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