PVC flooring is roilled out in long strips and then joint welded by little automatic machines, running along, following the joint by a sensor stick and equipped with a hot air fan and a roll of 4 mm PVC wire. Every floor working shop has been using them for a long time. PVC welding is easy. No CNC involved. Automation can be so simple.
Peter Blodow Am 16.10.2016 03:44, schrieb Leonardo Marsaglia: > 2016-10-15 22:33 GMT-03:00 John Kasunich <jmkasun...@fastmail.fm>: > >> Injection pressure will be trying to force the two sides of your mold >> apart. >> That's why injection molds are made of tool steel, and injection machines >> have VERY sturdy construction to hold the mold closed. I saw a machine >> that might be big enough to make your parts - the mold closing cylinder was >> about 2 feet (0.6m) in diameter, and the four steel tie-rods that held the >> machine together against the clamp force were about 100mm diameter. >> >> Could you make it out of four strips with some kind of joining at the >> corners? >> > Hello John. > > Yes the idea is to machine the four strips and then joing them strongly. To > clamp the mold I was thinking about mechanical ways like eccentrics or may > be screw clamps. That way I can hold the mold together when the injection > takes place. I really don't worry about the time consumption on open the > mold and close it again. > > The concerning part I have is if It's a good idea to move the pistons for > the injection with a screw and a common 3 phase AC motor. My idea is to > load the piston, wait for the plastic to reach the temperature and then > inject no less than 30 seconds. I probably have to preheat the mold too. > > --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
