CAD CAM EDM DRO - Yahoo Group Archive

Re: Small Injection molding unit?

Posted by Robin S.
on 2001-04-15 18:51:45 UTC
Dan,

Usually, the molds are orientated horizontally so that parts can drop
out of the mold. Ejector pins are used for more complex parts that
aren't as willing to *jump* :)

To automate it, you could buy a hydraulic press (spring loaded).
Harbor Freight (ugh!) sells a 10 ton hydraulic for $150. You could
have pneumatic cylinders connected to the mold for the ejector pins.

You'd need a PLC or micro-controller to run it, but it'd be cool as
hell! :)

As for positioning the mold, one could just machine a tooling plate
to bold molds to (a mold boot?).

Regards,

Robin

--- In CAD_CAM_EDM_DRO@y..., dan.eaton@c... wrote:
>
> Hi Robin,
> The book I have is 127 pages long and he devotes 44 pages to a
series
> of simple molds useful for making things like control knobs. It's a
> start but it won't tell you something I'd like to know like how to
> build a more complex mold to handle something like a G scale truck
> sideframe or bolster.
>
> As for automating the beast, the heart of it is the heater block
and
> piston. I'm sure a feed system would be easy enough to work out if
> you skiped the milk jugs and used plastic pellet feed stock and
> moving the piston via hydralics would in some ways be simpler than
> the current lever arrangement. The hard part would be getting the
> mold in position, removing it after the shoot, and removing the
> finished product from the mold to start the cycle over again.
>
> Dan Eaton (Saint Louis, MO)

Discussion Thread

cadman@p... 2001-04-05 13:56:33 UTC Small Injection molding unit? Joe Vicars 2001-04-05 14:15:34 UTC Re: [CAD_CAM_EDM_DRO] Small Injection molding unit? wanliker@a... 2001-04-05 16:58:17 UTC Re: [CAD_CAM_EDM_DRO] Small Injection molding unit? Smoke 2001-04-05 18:30:36 UTC Re: [CAD_CAM_EDM_DRO] Small Injection molding unit? dan.eaton@c... 2001-04-05 20:34:47 UTC Re: Small Injection molding unit? Hugh Currin 2001-04-06 08:12:49 UTC Re: Small Injection molding unit? cadman@p... 2001-04-06 09:22:00 UTC Re: Small Injection molding unit? Thanks Dan dan.eaton@c... 2001-04-13 09:46:14 UTC Re: Small Injection molding unit? Robin S. 2001-04-15 09:48:19 UTC Re: Small Injection molding unit? dan.eaton@c... 2001-04-15 18:23:26 UTC Re: Small Injection molding unit? Robin S. 2001-04-15 18:51:45 UTC Re: Small Injection molding unit? Rose, Gary 2001-04-16 05:39:53 UTC Re: Small Injection molding unit? Robin S. 2001-04-16 08:36:24 UTC Re: Small Injection molding unit? Alan Marconett KM6VV 2001-04-16 11:05:18 UTC Re: Small Injection molding unit? MIADSGNS@a... 2001-04-16 16:54:59 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Robin S. 2001-04-16 17:42:13 UTC Re: Small Injection molding unit? Marcus & Eva 2001-04-16 18:25:54 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Steve Barton 2001-04-17 04:48:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Smoke 2001-04-19 08:52:45 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Tom Eldredge 2001-04-20 03:58:48 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Tom Eldredge 2001-04-20 04:02:24 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? gordonr@r... 2001-04-20 10:02:46 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? wanliker@a... 2001-04-20 10:19:12 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? gordonr@r... 2001-04-20 10:22:04 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? dan.eaton@c... 2001-04-20 10:54:38 UTC OT: How to tell a fello's from Missouri wanliker@a... 2001-04-20 11:04:39 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Tom Eldredge 2001-04-22 08:58:48 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? Smoke 2001-08-15 21:01:11 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? dan.eaton@c... 2001-08-15 23:14:43 UTC Re: Small Injection molding unit? Smoke 2001-08-16 18:17:31 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? dan.eaton@c... 2001-08-31 22:15:13 UTC Re: Small Injection molding unit? Smoke 2001-08-31 22:55:33 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? dan.eaton@c... 2001-08-31 23:37:29 UTC Re: Small Injection molding unit? Smoke 2001-09-01 10:15:46 UTC Re: [CAD_CAM_EDM_DRO] Re: Small Injection molding unit? 8thscale@s... 2001-09-05 17:47:08 UTC Re: Small Injection molding ... follow-up