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MAPP Plastics Discussion Forum

The MAPP Plastic Industry Discussion Forum allows members to rapidly communicate with each other. Post both questions and answers to questions that other MAPP members have about any industry topic from material and process issues to R&E Tax Credits and other business issues.

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Plastic Industry Forum - Converse with Plastics Processing Leaders / Business / Additional Platen Knockout Holes Needing Drilled
Posted:  01 Jul 2008 15:06
Richardson Molding is looking for someone who would have the equipment to drill 8 new knockout holes on site on a 1000 Ton platen.

These would be 1.5" thru-holes, 20" deep, on a 4 X 16 pattern. If you have any suggestions of a millright service that could perform this work please contact me.


Gary Robitaille
Maintenance Mgr.
Richardson Molding Inc.
Columbus Indiana
812-342-0139 X 217
Posted:  01 Jul 2008 16:17
Gary, I've contacted several machining companies and raw material steel suppliers in the Indy Chapter of the National Machine Tooling Association to find a source that can do the job you require.  The problem with flooding as well as it being the summer has put a severe crimp on the "in-field" service teams which will probably drive pricing high for this job should you find somebody with the capability. 

In addition to the shortage of help, the 20" diameter holes require special equipment that not many organizations possess.

With this said, I would encourage you to contact Bert Whisenand at Horner Industrial at 317-639-4261 or Max at Indstrial Sales at 317-240-0560.

Troy Nix
Posted:  01 Jul 2008 16:52
Gary, you might want to think of another alternative to drilling the platen itself.  In the automotive industry, mounting hydraulics to the plastics injection mold is often a practice used.

If you want to discuss, please contact me at 317-776-0860.

Lindsey Hahn
Posted:  01 Jul 2008 20:45

This is a long shot but it may be worth your consideration. Since you have a large open height you could mount a drilling head similiar to a bridgeport head on the fixed platten. This will require that you fabricate a frame that can be clamped to the fixed platten. This frame would hold the drill motor in the horizontal position.

You would then clamp a drill bushing to the movable platten on location to drill. The next step would be to allign the drill head with the bushing. Once the allignment was achieved you would back the movable platten off and install the drill. I would probalby start with a 1/2" drill and work up to the 1 1/2"

Now that the drill is in place and alligned with the drill bushing you could manually bring the ram forward under low pressure against the turning drill.
By controlling the speed of the drill and the ram pressure you should be able to drill through the platten.

I hope this is not too far out.

Good luck.

Lindsey Hahn
Posted:  01 Jul 2008 20:53

That is an interesting concept. I'll see what other avenues may show up. I may have to look into your idea.

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