27
votes
Accepted
How was this toy made?
OP injection molding tag is correct. OBall uses injection molding and plastic welding.
The OBall is the invention of David E. Silverglate.
Toy Ball Apparatus with Reduced Part Count
Reduced image ...
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3
votes
Accepted
Improving O-Ring/flapper valve injection mold ->non-engineer
This community is not dead, but it is assuredly populated by people (like me) who make a living by being paid to solve problems exactly like yours.
Now, it is common for small design and manufacturing ...
- 15.3k
3
votes
Accepted
Is this shape possible with injection moulding?
Yes it is, in fact the part in your picture was almost certainly made this way, as follows.
An injection mold can be made to accept those metal pins, which are positioned in the mold so that when the ...
- 15.3k
3
votes
Accepted
Injection molding: What is best for a dual cavity single mold?
The optimal solution is usually thus:
You move each of the cylindrical features into its nearest corner and mold it in flush with the side walls.
You extend all eight of these bosses (that's what ...
- 15.3k
1
vote
Why does the cylinder/barrel on an injection moulding machine have such thick walls?
Because injection molding pressures can get very high - typically peaks of 16 ksi , and the hoop stress in the steel is governed by the ratio of bore diameter to wall thickness.
Your suggested ...
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1
vote
Mechanism for turning a thumbwheel potentiometer
As you say, it's a custom thumbwheel potentiometer.
Figure 1. Results from Google Image Search for thumbwheel potentiometer.
Large open-frame potentiometers use to be commonly available but don't ...
- 11.1k
1
vote
How was this toy made?
One way of making it is to flatten an Icosahedron on a plastic sheet As the figure and after molding while it is still malleable bend it to shape.
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- 22.8k
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