1 00:00:00,000 --> 00:00:09,000 But what we're going to do is we're going to do a couple shots and we're going to get a couple different views of this area and the business end of the piston. 2 00:00:09,000 --> 00:00:12,000 Well, one of the business ends. All this is one business end. It's all business end. 3 00:00:12,000 --> 00:00:21,000 Anyway, here we go. So what we do is, because it's on single, it's going to close, it's going to do a shot and then it's going to open and then it's going to stop and wait for me to hit run again. 4 00:00:21,000 --> 00:00:25,000 That's why it's called a single shot. We just don't have it set up for multi-shot. 5 00:00:25,000 --> 00:00:30,000 We don't have an ejector plate. Yeah, we have a door open because the plastic is stanky. 6 00:00:30,000 --> 00:00:33,000 So we're just going to send it. 7 00:00:33,000 --> 00:00:35,000 Now it's going to go the other way. 8 00:00:47,000 --> 00:00:50,000 Now comes the fun part of having to fish it out. 9 00:00:50,000 --> 00:00:54,000 You guys got it? Oh, that actually wasn't that bad. 10 00:00:54,000 --> 00:00:57,000 Except it's supposed to stick to the other part. 11 00:00:57,000 --> 00:01:01,000 So this is what we say. We have to run a couple shots before it actually works properly. 12 00:01:01,000 --> 00:01:04,000 There you go. We made a thing. Hey! 13 00:01:04,000 --> 00:01:07,000 It's a little warm. Also like that air bubble though. 14 00:01:07,000 --> 00:01:10,000 So there's a little bit of a color difference between these two. 15 00:01:10,000 --> 00:01:16,000 I'm not sure if that'll come through or not. But that's essentially going to come down to the plastic itself. 16 00:01:16,000 --> 00:01:22,000 It has been heated up and cooled multiple times. It's a little bit, like, not denatured but overheated. 17 00:01:22,000 --> 00:01:25,000 So what happens is every single time you heat up a plastic, 18 00:01:25,000 --> 00:01:28,000 you basically burn more of the carbon, right? 19 00:01:28,000 --> 00:01:31,000 So when you burn carbon, like, it's charcoal basically. 20 00:01:31,000 --> 00:01:34,000 So it goes more dark as it goes more black. 21 00:01:34,000 --> 00:01:37,000 You basically want to heat it up, shoot it, and then be done, right? 22 00:01:37,000 --> 00:01:40,000 If you were to take that, re-grind it, use it again, it would come out darker. 23 00:01:40,000 --> 00:01:45,000 It's more noticeable on clear parts because, like, there's literally, 24 00:01:45,000 --> 00:01:49,000 like, you can just see there's a change in, like, transparency. 25 00:01:49,000 --> 00:01:52,000 So what did happen was it clamped. 26 00:01:52,000 --> 00:01:56,000 The gate opened, the piston, like, loaded it itself, 27 00:01:56,000 --> 00:02:01,000 and then released to actually shoot the shot. And then it waited for a bit for the plastic to cool, 28 00:02:01,000 --> 00:02:05,000 and then it pulled the mold away, which is what it's doing now. 29 00:02:05,000 --> 00:02:09,000 And the reason why it's sticking to the wrong side of the mold 30 00:02:09,000 --> 00:02:14,000 is we were a bit impatient, and we didn't really wait for the mold 31 00:02:14,000 --> 00:02:19,000 to get out to temperature, and we just kind of ran it. In theory, you can't run it unless this whole effect sensor's active, 32 00:02:19,000 --> 00:02:24,000 so until we close that, we can't run it again. You never want to stick your finger in between the plates, 33 00:02:24,000 --> 00:02:29,000 which is why we have tools. Trim removal tools for a car. 34 00:02:29,000 --> 00:02:33,000 That's what they sent us. It's still not lighter. 35 00:02:33,000 --> 00:02:38,000 It's still pretty dark, so that still means we have old plastic in there 36 00:02:38,000 --> 00:02:45,000 that hasn't been kind of pushed through. Let's do one from here, where you can actually see the piston being loaded up. 37 00:02:45,000 --> 00:02:48,000 Like I said, there's this big shock absorber-style spring, 38 00:02:48,000 --> 00:02:54,000 and this Chungus motor that drives it. Robert will talk you through what he just talked to me through, because I was... 39 00:02:54,000 --> 00:02:58,000 So, Robert, when I hit run, you're going to do your spiel. 40 00:02:58,000 --> 00:03:02,000 So, here we go. I'm going to hit run. This is good, boys. 41 00:03:02,000 --> 00:03:08,000 Look at it light as it moves. As it starts to move, you can see how slow the motor's moving with that piston. 42 00:03:08,000 --> 00:03:12,000 That wouldn't be fast enough to inject the plastic just with the piston. 43 00:03:12,000 --> 00:03:18,000 So you can see now the spring is compressing. What's actually happening is we're compressing the spring to build the amount of injection pressure, 44 00:03:18,000 --> 00:03:22,000 and then in a minute you'll see that chain up top when that opens. 45 00:03:22,000 --> 00:03:25,000 Then the spring actually releases all that built-up pressure, 46 00:03:25,000 --> 00:03:31,000 and that's where you get the injection speed, because the motor doesn't move fast enough on its own to inject it just with the motor. 47 00:03:34,000 --> 00:03:41,000 That little bit of chunky chunk. That's it, holding the injection, the hold pressure for a long period of time. 48 00:03:41,000 --> 00:03:44,000 So it's kind of going a little bit forward, going a little bit back 49 00:03:44,000 --> 00:03:47,000 to tune the hold pressure to be just correct. 50 00:03:47,000 --> 00:03:51,000 And if you look on this side... Yeah, it came out on the right side. 51 00:03:51,000 --> 00:03:53,000 Almost perfect shot. 52 00:03:54,000 --> 00:03:56,000 Okay, someone take it out. 53 00:03:58,000 --> 00:04:02,000 The reason why Robert said the motor's not fast enough 54 00:04:02,000 --> 00:04:05,000 is because the plastic cools really quickly when it hits the mold. 55 00:04:05,000 --> 00:04:10,000 So you have a very limited time for it to flow around the whole cavity. 56 00:04:10,000 --> 00:04:16,000 So you need to go fast, but not too fast. 57 00:04:16,000 --> 00:04:19,000 There's a very defined time it needs to go in, 58 00:04:19,000 --> 00:04:24,000 and that's kind of why you build up the pressure. They just whack it all at once, then they're like slowly eking it in. 59 00:04:24,000 --> 00:04:28,000 Because imagine hot plastic touching a cold surface. 60 00:04:28,000 --> 00:04:33,000 It'll start hardening that surface, and then the actual flow will just stop. 61 00:04:33,000 --> 00:04:37,000 And then if it doesn't fill the whole mold, you'll get gaps. 62 00:04:37,000 --> 00:04:45,000 So imagine it not going all the way around. So on this part, you can imagine the plastic traveling through here, along here, 63 00:04:45,000 --> 00:04:48,000 and then splitting, and going all the way around and coming back here. 64 00:04:48,000 --> 00:04:55,000 If it was too slow, you would only get maybe that amount. 65 00:04:55,000 --> 00:05:00,000 So when it splits, it'll slowly solidify, solidify, solidify, then stop. 66 00:05:00,000 --> 00:05:05,000 And then it's like, oh well, you've just gone and fudged up because that's not what you wanted. 67 00:05:05,000 --> 00:05:11,000 So you have to shoot it fast enough so that by the time it actually meets up again, 68 00:05:11,000 --> 00:05:14,000 it is still molten. 69 00:05:14,000 --> 00:05:17,000 It's not exactly the right word because it's not technically molten. 70 00:05:17,000 --> 00:05:22,000 So right now, we're changing the mold out, so you probably want to get this on camera. 71 00:05:22,000 --> 00:05:25,000 So this thing, it's held on by some clamps on either side. 72 00:05:25,000 --> 00:05:29,000 But you just have to loosen off, and you kind of stop them. 73 00:05:29,000 --> 00:05:32,000 That might be warm. It's not too bad. Is it not too bad? 74 00:05:32,000 --> 00:05:38,000 It's not too bad. Don't touch this part. You can also remove the shroud. 75 00:05:38,000 --> 00:05:42,000 So you can see how this part was made. 76 00:05:42,000 --> 00:05:45,000 Oh my goodness. There's some shrinkage here. 77 00:05:45,000 --> 00:05:48,000 Yes. Plastic shrinks when it cools. 78 00:05:48,000 --> 00:05:55,000 Okay. That part made that. Now you can imagine if you can visualize what this is going to make. 79 00:05:55,000 --> 00:05:58,000 So everywhere where there is a gap, there is going to be plastic. 80 00:05:58,000 --> 00:06:05,000 So you're going to have this same little, we call it a sprue. 81 00:06:05,000 --> 00:06:09,000 Basically, sprues go up and down, and then runners go side to side. 82 00:06:09,000 --> 00:06:13,000 So this is a sprue. That's a runner. And then this is the actual part. 83 00:06:13,000 --> 00:06:16,000 So what you would do is you would break this off eventually. 84 00:06:16,000 --> 00:06:20,000 And that would be your part. The full square one. 85 00:06:20,000 --> 00:06:23,000 Because I cut this one. 86 00:06:23,000 --> 00:06:30,000 But that would be your actual part. And you would actually just get rid of that or re-grind it and use it again. 87 00:06:30,000 --> 00:06:36,000 But we have the sprue coming down and we have the two runners that split into the four cavities. 88 00:06:36,000 --> 00:06:39,000 And all we care about is that ring part. 89 00:06:39,000 --> 00:06:42,000 So we'll end up cutting this off. 90 00:06:42,000 --> 00:06:48,000 I wonder if we should get some sort of chop chop boy to re-chop this up to make more re-grind for that. 91 00:06:48,000 --> 00:06:51,000 It's probably not worth it at the volume we have yet. 92 00:06:51,000 --> 00:06:54,000 I know. But when have we ever done something because it made sense? 93 00:06:55,000 --> 00:07:02,000 To insert this mold back in, you have to essentially more or less line up the pins. 94 00:07:02,000 --> 00:07:10,000 But because it's a very tight fit, the last little bit of the insertion you actually have to do with the clamp itself. 95 00:07:10,000 --> 00:07:13,000 I don't know if pasty is the right word. 96 00:07:13,000 --> 00:07:16,000 They literally suggested it. Oh, okay. 97 00:07:17,000 --> 00:07:18,000 Run it! 98 00:07:25,000 --> 00:07:26,000 Run it! 99 00:07:34,000 --> 00:07:39,000 Well, I mean, it's sort of like automatic ejection. Except it's attached to the wall of fame. 100 00:07:39,000 --> 00:07:45,000 In all fairness, despite the ejection, the actual part itself is getting better and better. 101 00:07:45,000 --> 00:07:50,000 Yeah, the rings look great. It's not sticking to the mold side, which means it's getting deformed. 102 00:07:50,000 --> 00:07:53,000 Yeah, that's what I was pretty much about to say. 103 00:07:54,000 --> 00:07:55,000 Hey! 104 00:07:57,000 --> 00:08:00,000 The new injection molding machine that we bought. Yes. 105 00:08:00,000 --> 00:08:09,000 Inside is a 3D printed mold that makes rings. So, Robert designed a mold that we stuck on the SLA machine in high temp resin. 106 00:08:09,000 --> 00:08:14,000 We milled out a pocket of a mold, and that's now sitting over there. 107 00:08:14,000 --> 00:08:17,000 And now we can inject as many plastic parts as we want. 108 00:08:17,000 --> 00:08:21,000 Except we're trying to figure out how it works properly because we're having issues. 109 00:08:21,000 --> 00:08:25,000 Pretty crap. We're having issues. Oh, that's crap plastic. 110 00:08:25,000 --> 00:08:28,000 That's polypropylene. So, it's like this plastic you can get. 111 00:08:28,000 --> 00:08:34,000 It's just the least toxic, right? If we were doing ABS in here, it would stink like pretty bad. 112 00:08:34,000 --> 00:08:40,000 Like with hotbox ourselves with VOC, you know what I'm saying? So, we kind of just dialed it back with like cheap plastic, but it is crap. 113 00:08:40,000 --> 00:08:46,000 Okay. Okay, so if we wanted to do like a special one-off handle in some weird plastic or something. 114 00:08:46,000 --> 00:08:49,000 Potentially. Yeah. Yeah. 115 00:08:52,000 --> 00:08:59,000 This is basically the $70,000 optical inspection machine that can measure down to like micro and micron level. 116 00:09:03,000 --> 00:09:05,000 Bye! Bye, 4.5. 117 00:09:07,000 --> 00:09:09,000 Bye, 4.5.