Semi Automatic Ejector Pins

Рет қаралды 7,581

Күн бұрын

Semi-automatic ejector pins allow making plastic injection molded parts that would otherwise be very hard, if not impossible, to extract from the mold. This is a mold I made several years ago for my Travin TP-1.
Mark Presling's Channel: / @preso58

Пікірлер: 29

@sayeager5559 2 жыл бұрын

Marks channel is great. He mentioned you a few weeks ago which led me here and subscribed.

@JohnSL 2 жыл бұрын

Welcome aboard! And yes, his channel is great. And he gave me a very nice shout-out that caused a welcome spike in my subscribers.

@darrelsomoza2927 2 жыл бұрын

Excellent. Thank you, John. I learned a lot and enjoyed your presentation and work.

@JohnSL 2 жыл бұрын

Glad it was helpful!

@rhokdatroll 2 жыл бұрын

Great video 🤟🏻

@joell439 2 жыл бұрын

Looks like pin stop arms have a threaded hole in them. Why not use a jackscrew at that location to adjust the ejection pin stroke.? That way you can lock down the stops you were using all the way flush and then easily be able to adjust the jackscrew from the clamp side. Always interesting 👍

@plasticman3952 2 жыл бұрын

Attach the ejector plate with bars to the A-side. The ejector pins will move forward as the mold opens.

@GregryCM 2 жыл бұрын

I enjoy your videos and find them very informative. What are the parts that you are molding?

@JohnSL 2 жыл бұрын

I guess I forgot the mention that. These are for N scale model trains. They represent a single row of concrete ties, which are transported on flatcars stacked 4 or 5 rows high.

@David_11111 2 жыл бұрын

yay

@7xME 2 жыл бұрын

Maybe a linear rack and gear and a cam would be a easier style locking system..great mould design fab..looks like some serious engraving

@7xME 2 жыл бұрын

High compression air blast as well,maybe?

@jrod4538 2 жыл бұрын

Good video. I prefer using ejector plate springs.

@JohnSL 2 жыл бұрын

I didn't know about the springs back when I made this mold, a few years ago. But when I make molds for the Arburg C4B, I definitely plan to use springs in addition to return pins. I assume that's what you meant?

@katdat1399 10 ай бұрын

Springs aren't necessary for small mold production like this, as long as the guide rods hit a mold safe area on the A side, springs are not needed.

@AndyMaker Жыл бұрын

Excellent Channel John! I Subbed and liked. That's a beautiful shop you have. I'm picking up a Butler 10/60 injection molder next week. What is the shot sizes of your machines? - Andy

@JohnSL Жыл бұрын

That machine is a Travin TP1 and you can check their web site for shot size. The shot size has never been the limiting factor--it's been the clamping force.

@akshayd211 Жыл бұрын

Great video! What is that part used for? :) Very curious to know.

@JohnSL Жыл бұрын

They're for model trains and represent a load of concrete railroad ties. A single load would be 4-5 layers of ties, and these plastic parts are designed to stack.

@cskilbeck 2 жыл бұрын

a tool which helped with the alignment of the ejector plates would be a cool machining video, if such a thing was possible

@JohnSL 2 жыл бұрын

Once I get my Arburg C4B running, I'll definitely be making new molds with ejector pins.

@romulusmare 2 жыл бұрын

Where do you sell these kits?

@JohnSL 2 жыл бұрын

I don't sell them yet. I want to remake the mold for a fully automatic injection molding machine that I'm getting up and running. That will make it less labor intensive to make these parts. Once that's the case, I will set up a web site where I'll sell them.

@margaretwood152 9 ай бұрын

😄😄😄

@andrasnagy2822 2 жыл бұрын

Hallo, I wonder if you have already tried using 3D printed resin mold? I'm experimenting with this now. If you have any experience with this, please share your experience with me. Even in a private message. Congratulations on the videos, they are very helpful! Thanks

@riccardodipietro4400 Жыл бұрын

resin molds would deform under the heat and pressure very quickly they would not survive more than a few injections at best

@ploegmma 2 жыл бұрын

About the part sticking to the pins, maybe you should watch what Dragonfly is doing. It would be a cool new toy for you: kzfaq.info/get/bejne/ndWDis-csr61nGw.html

@JohnSL 2 жыл бұрын

That's all I need, another project 😀. I think Dave has an addiction to robots 😉.

@dass1333 2 жыл бұрын

Set-up is the path to success. To just have a tool does not make it work the way you want. You put things together see how it will function and look for ways to improve. That makes for understanding. Plug and play just makes monkey work. And boring videos.