Rotational molding machine arm design

[hlopezho]

Grettings...Im designing a rotomoulding machine, i would like to ask a gearing issue..as you can see in the video, this kind of machine has a biaxial rotation arm, and im pretty sure is geared to obtain this motion with bevel gears, but im not sure of the gear design itself...is a simple 4 bevel gear configuration? if needed, how do you control the rotation in the 2 axes? Do you need to put another motor in the tip of the arm? Thanks for your sugestions and ideas.

 

[btrueblood]

"Do you need to put another motor in the tip of the arm? "

I wouldn't, it gets pretty hot there.

Outer hollow arm for rotation of the main spindle. Seperate inner shaft and bevel gears for rotation of the parts on their axes.

 

[hlopezho]

Hi there,,,thanks for your answer...so, two motors? one for the hollow main spindle, and the other one for inner shaft??

 

[MikeHalloran]

I think the inner shaft can be fixed.

Mike Halloran
Pembroke Pines, FL, USA

 

[btrueblood]

Agree with Mike. Though if necessary or desirable, I don't see why you couldn't rotate the center shaft too...even reversing direction at some point to really shake things up.

 

[batter1979]

You could run both axes from one motor with 2 gear sets on the motor shaft. you would need to adjust your ratios for proper angular velocity. However if you wanted to be able to turn off and on the drums you would need a clutch or 2 motors. The end of the shaft turning the drums would have a central bevel gear rotating the four drums connected to thier individual bevel gears

 

[chicopee]

It seems that you have one ring gear driving three separate spur gears.