Monthly Archives

I received a series of follow-up questions from yesterday’s blog entry. I will do my best to paraphrase and answer… Blog Reader One machine has a 30mm screw (3100 bar max pressure), and one has a 40mm screw (1800 bar max pressure). Both have the same size injection cylinders. When I transfer from the 30mm to the […]

I corresponded with a frequent blog contributor late last week… Milan If my fill time varies 0.02 seconds, is that a machine problem? I have a similar machine with 0.00 seconds variation. note: after a few emails, it was determined… 200 ton hydraulic machine 38% shot size 0.55 second fill time Possibly a pressure limited […]

This question arrived in my e-mail the other day… Jason In a previous blog you mentioned the term ‘Vent Drop’. Could you explain how these are typically incorporated into the mold design? Note: Jason is referring to the post Venting Issues which states: One commonly overlooked aspect to venting is the vent drop. Behind any well designed vent […]

A student just e-mailed me this question… JH I am a little confused about the difference between Near Field and Far Field ultrasonic welding. Is this referring to the size of the part or the horn? My Response Actually, near and far field refers to the distance from the ultrasonic horn to the weld joint. Typically, […]

This is a question similar to others I often receive… MJ If I’m using a DII process, why should I turn off pack/hold time when I am filling 98% during first stage? My Response Turning off pack and hold is a great way to verify your fill is properly established, especially when you document the […]