Laminate plates are a no brainer to get perfect laminates. There are more times than not that i get bleed over when trying to shoot laminates in a mold cut for shooting laminates. I have considered having laminate plates made to stop the madness. So how do you minimize or eliminate bleed over using a dual injector. It can happen at any temperature between 300 and 350 degrees. Thanks.
The temperatures between the 2 colours need to be as close as you can. Very tricky to do consistently with microwaves. but yes, if your temps are right it will laminate fine.
What have you found to be the best temperature for the two colors to get laminates to shoot with minimal or no bleed over? Thanks!Quote:
Originally Posted by Angler's Choice
The viscosity between the colors is more important than the temperature.
When you are using a dual injector on your blending block if you have some of the hot plastic on the one side and went to the blending block and go ahead and inject your going to have a mass I would assume that something like that happen to you you have to make up for sure that it's still in the injector before you put it in the blending block. when I used the dual injector the temperature for never even because I used two different microwaves but they are plenty hot when I go ahead and shoot I had that incident happened to me the other day where we had some bleed over what that was my fault like I told you a little bit of one color got into the blending block and then I went ahead and injected so what little burnt to the other color you can be off 9° one way or the other when you are shooting the dual injector on both of the cups that you are using. using a laminate plate you shouldn't have any problems just to mention on the half that you are going to shoot the hot plastic on his cold right. but like I told you I'm sure you got some of the plastic up one side of that dual injector into your blending block. in what blending block or I should say dual injector are you using. I am using a Bass tackle
I am using a Bass Tackle blending block. I sense that temperature drives viscosity. I have finally purchased a laser thermometer. My worst bleeding happens when I heat a fresh batch of 4 oz in two Pyrex cups in two microwaves of the same make. I think i have one cup contents hotter than the other which is probably causing the bleeding. My guess is that both cups need to be at a lower temperature. I have also noticed that the wider the opening in the mold to accept the blending block the less chance of bleeding in that the sprue column is so wide the colors can not mix. Other molds with a very narrow opening run a high risk of bleed over. I will experiment with temperature to see what happens. I heat 4 oz of fresh plastic for 90 seconds. The temperature is at 350 degrees generally on a morning where the air temp is 60-65.Quote:
Originally Posted by snake River
Check your infra red tm i have one it is correct until about 250f then it does not read correct. i use a digital thermometer now and i set my cups on a grill to stay warm. Cub48
when shooting laminates the overall temp you shoot at is less important than making sure they are close. Viscosity is what you are after but on the small hobby level making sure the temps are as close as you can will do.
Injection machines run very hot yet they are able to maintain a laminate in a 30"+ long runner. And no there aren't any special things going on in a machine, they control their laminates via temp.