Our products have been experiencing voids and jet stream flow lines on their nylon structure. Some of the factors contributing to this can be attributed to cleanliness, vents clogged, contaminated runners, etc... what I'd like to know is if there is any type of standard test that can be...
Guys, thanks for all your input. I have been away and now I'm back. I am pleased to inform you that we have managed to come up with better ways to control our robot's position. In addition, we are also using a nickel/phosporous teflon coat on our inserts for strength and slick surface to...
Hello All,
I'm in search of some suggestions for equipment manufacturers. Specifically, my company deals with machines which use fully automated robots to load and off load parts from molds. I am looking to bring in a couple of suppliers to discuss possible options for future injection...
thanks, guys for being so helpful. I am now more comfortable with this issue. FYI the root cause of my problems was not in the material, but rather on a leaky screw tip and calibration of parameter tolerances on the controls. It seems to be working fine now.
My company uses a reciprocating screw set-up for injection molding of nylon 66. I have noticed that varying the cooling time parameter on the injection unit affects my melt cushion. What is the relationship between these two, if any? I thought the cooling time allows time for the injection...
My company is in search of a Process Hazard Analysis software. I'd like some suggestions from engineers that currently use any software out there....
thanks,
In search of a bore gauge 17-25mm and 10-20" in depth. Any suggestions as to what suppliers may carry this type of gauge? I tried McMaster already.....any others....thanks,
Yes, the inserts hold the part in place while it molds. The inserts do not get ejected, they are fixed to the molds. The manufacturing and cost of bronze is a concern. Our automated robots damage the bronze inserts when the parts are inserted into mold. Curious to know if there are other...
We currently use bronze inserts to hold our parts in place during injection. Vespel inserts were used in the past, but found to be brittle and damaged easily. Bronze has worked out well, but with increased production we need alternative material.
The most important characteristics, i think...
Our injected molded parts use use Nylon66 for insulator covers. We have always experienced "bubbles" build-up, but not too significant. Most of the gas entrapment has been eliminated by simply keeping surfaces (mold, runners, and cavities)clean. Lately, a significant increase in bubbles has...
Background:
A complete shot is composed of two injections. The first is the largest amount of plastic (~95%) and the second is the smallest injecting the remainder of the plastic (~5%). This helps to control the molded plastic by allowing the first shot to fill most of the cavity and let the...
the machine used for processing is a reciprocating screw type of machine. Lately, I have been experiencing "melt cushion" problems. Apparently, from what I understand, this means that I am losing some of my plastic sowhere...my shot seems to contain less plastic? we use shut off nozzles to...
