How Bowling Balls Are Made [video] | Hacker News Reader

How Bowling Balls Are Made [video]

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32 pointszdw14 comments

While I love the content, generically named, generically themed, freshly made (Feb 2023), non-personalized content channels make me so skeptical on who's running them and where the money goes. There's such a high volume of things like this it must be non-neglidgeable

What is the significance of the core's shape? Looks kinda like a bullet.

Effect of coverstock, core and layout on ball motion[0]

[0] https://en.wikipedia.org/wiki/Bowling_ball#Effect_of_coverst...

It has to be asymmetrical because of the holes that will be drilled. And it is bullet shaped because of the "draft angles" of the mould (to make demolding easier)

tldr; "Core dynamics" and shapes change the hooking potential of a bowling ball

Here's a decent explainer:

https://youtu.be/qdY97ym_2Jc

This part automated, part robotic, part manual workflow is interesting. When a robot arm and a human hand with hammer work together in the same area that made my eyebrows elevate a bit.

Same, especially when it seemed like the robot arm wasn't adding much to the process?

Also the use of pneumatic tools (from I assume, some central compressor) as well as battery powered impact drills. Wouldn't it be so much more economic to use all pneumatic tools? All stations are static, one big compressor feeding a bunch of cheap pneumatic heads versus all the individual battery tools, and managing the batteries, etc. Maybe their tooling changes frequently due to the semi-custom nature of bowling balls?

Maybe it depends on what you learned with but to me, modern cordless tools are much more convenient than air tools even if you're not wandering around.

This is what you get in a long-established factory which, over time, gradually updates the weakest part of its process. The manual parts are either hard to automate, or are just so cheap to do manually that there's no point. At some point a human did the job that the robot arm does now, but then that became the bottleneck in some way. It was cheaper to get a robot arm than a human, or maybe there's nowhere for a human to stand on that side of the line, or maybe the human is just too slow lifting that much weight 20 times an hour.

Edit: After having seen more of the video, that robot's doing a lot of heavy lifting (no pun intended). It seems to be doing all of the movement of the balls into and out of the various machining cells, and it's involved in quite a few steps of the production process. It's definitely paying its way.

Yes, yes, mostly moved by the robot. Except when the ball drops out of a form rolled over by hand, second when put into the lower bench of a trolley by hand, also when rolls out of a machine (sanding?) stopped by a rolled towel to be wiped by hand and an other towel. : )

Pretty eclectic in this current transition form. Not my state to judge, not at all, I actually like what I see and lern here, it just looks funny for an outsider here and there. : )

might i recommend footage of drilling rig workers performing a pipe connection

That’s much more human involvement than I expected.

I like how the one step is labeled "polishing machine", given it goes in a smooth from the mold, and comes out covered in pits.

I think that was the polishing exposing air bubbles in the casting, not damage caused by the polishing itself.

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