If the orifice on the mold sprue bushing is 7/32nds and the nozzle tip orifice is 5/32nds would this be suitable or cause an issue with injection pressure?
@@rjg Thank you, i have searched PPE and IMS and cannot find a nozzle tip with a 35mm radius. Do you have any supplier recommendations. I really appreciate your response and help.
What about using blue to confirm contact... ie making sure bushing is .500” and nozzle is .499”? To ensure no air gap and stuck sprues? Also how about a video on that stringer that poker chip had going and a video on how to clean a mold face without scratching it
That is definitely a good technique to use. Those are great ideas, maybe we will incorporate them into future videos! Knowing how to polish a mold correcting is a must-have skill. Thanks for the comment!
Was there another video on this yet? If your sprue has extra plastic causing it to stick there then it could be the mating surface yes, but also consider the temperature, and the diameter of the nozzle! This issue also leans toward the problem with "stringers" and cleaning the mold because of it! Which btw stringers will eventually damage the mold and are, in my opinion, unacceptable
Wow thats a nice one looks like Jack and the bean stalk. :) How about a damaged nozzle tip and or sprue bushing, Loss of cavity PSI due to plastic not going where it is supposed to....
@@zahidmahmood6586 Good point!! Interesting how you can now incorporate two different systems to protect from "plastic not going where it's supposed to". Usually we just use max injection pressure to alarm before damage, but you have now incorporated another safeguard! Good job!
Let's say your nozzle orifice is 2 or 3 times smaller than the orifice on the mold. Could it cause problems with dimensions of the part you are making?
Hi Jason, having the nozzle smaller than necessary will make an unnecessary restriction in the melt stream. This will cause higher injections pressures, greater pressure losses and possibly increased shear through the nozzle. This can make cosmetic defects and make it difficult to fill and pack out the parts. So dimensional problems can definitely be caused by this.
Hi,
Your teaching way is excellent. Please could you forward the 3/4"-1/2" radius gauge tool code or reference for shopping?
Thank you.
Plastics Processing equipment: Radius inspection gauge
Thanks for sharing this important information.
Nozzle alignment and the barrel alignment
Absolutely!
If the orifice on the mold sprue bushing is 7/32nds and the nozzle tip orifice is 5/32nds would this be suitable or cause an issue with injection pressure?
thank you a lot can you give me the link to buy the tools please
Thanks for advices.
Thanks for watching!
I have a tool with a 35mm radius sprue bushing. If i use a 3/4 radius nozzle tip will i have a leak?
Hi Josh, that’s a big maybe. If the alignment is perfect then maybe. The better option would be to change the spruce bushing or nozzle tip.
@@rjg Thank you, i have searched PPE and IMS and cannot find a nozzle tip with a 35mm radius. Do you have any supplier recommendations. I really appreciate your response and help.
What about using blue to confirm contact... ie making sure bushing is .500” and nozzle is .499”? To ensure no air gap and stuck sprues? Also how about a video on that stringer that poker chip had going and a video on how to clean a mold face without scratching it
That is definitely a good technique to use. Those are great ideas, maybe we will incorporate them into future videos! Knowing how to polish a mold correcting is a must-have skill. Thanks for the comment!
Was there another video on this yet?
If your sprue has extra plastic causing it to stick there then it could be the mating surface yes, but also consider the temperature, and the diameter of the nozzle!
This issue also leans toward the problem with "stringers" and cleaning the mold because of it! Which btw stringers will eventually damage the mold and are, in my opinion, unacceptable
The best way to clean a mold face without scratching it is by using an ice blaster from Cold Jet such as the i3 Microclean blaster.
Haalo sir. How to centering hole nozzle and sprue bush.
Is easy to change nozzel?
Yes it is quite simple, maybe a future video!
Do you know the item number to purchase the measuring tools used in this video?
www.ppe.com/content/Flipbook/17cat/ppe.html#p=491
Wow thats a nice one looks like Jack and the bean stalk. :) How about a damaged nozzle tip and or sprue bushing, Loss of cavity PSI due to plastic not going where it is supposed to....
Thanks! We will add pressure loss to the list of potential future videos.
Always used minimum carriage forward pressure to prevent any damage to sprue bush. Nozzle forward pressure should be optimized.
@@zahidmahmood6586
Good point!!
Interesting how you can now incorporate two different systems to protect from "plastic not going where it's supposed to".
Usually we just use max injection pressure to alarm before damage, but you have now incorporated another safeguard!
Good job!
Let's say your nozzle orifice is 2 or 3 times smaller than the orifice on the mold. Could it cause problems with dimensions of the part you are making?
Hi Jason, having the nozzle smaller than necessary will make an unnecessary restriction in the melt stream. This will cause higher injections pressures, greater pressure losses and possibly increased shear through the nozzle. This can make cosmetic defects and make it difficult to fill and pack out the parts. So dimensional problems can definitely be caused by this.
I feel like that pic of it going over the barrel was a shot at an employee, come on rjg we’ve all done it don’t be salty
That has definetly been done before and sometimes the best we can do is find the humor and learn from our mistakes.