yes the gate file thing will work at some point(we are talking about a 40% imbalance, which we have yet to hear what this equals in grams??)
well this all does seem moot if the final product is good balance can have a large influence on quality down the road.
If everything wears the same which...
Thats nasty stuff and if there is any heat that makes things must worse. I have done some stuff with high % HF using CTFE. Good results. Problem with Mica and other fillers is their resistance to strong acids.
sorry pat
I recognized the poster and i had never posted an attachment here. http://files.engineering.com/getfile.aspx?folder=446a9b47-4e42-43df-9108-7619470f1562&file=Nissei-TieBarStrain.jpg
hey mauricio,
I called Nissei like Dwight suggested. They faxed me spreadsheet that looked at the issue a little differently than I was. I will scan it tommorow and post it in the plastics.com injeciton forum.
I am looking for a reference on allowable strain on a tie bar and allowable variation between all four bars. I would not think it could be more than a couple .001" but is there a reference. I looked in my machine manual and strain gauge sites, no help. The machine is a nissei 360.
check out www.injectionmoldingonline.com.
also check out www.plastics.com/communities
read articles on www.immnet.com
These will give you a lot of information about plastics processing. After you got your basics down let us know if you have a specific questions.
sorry i guess my information relay skill on friday are quite poor.
The parts are sleeve ejected and when the mold goes to the shop you can see the stains all the way back on the sleeves. So when the sleeve ejects it stains the core and rear cavity.
I will check out the fretting corrosion...
hey pat
sorry about my lack of info
the material is PP so i don't think that is the issue. mold runs 70F water with proper back pressure and RPMs.
We have the problem more in the summer than the winter and we have even seen the "rust" during dry cycles.
I agree that it might not be rust but...
possible sources of rust on stainless steel components?
Wear.
Gassing from material or poor vents.
electolosis from poor gronding?? for real?
Am i missing somthing. we are having a rust problem and we cant use any sprays beacuse of medical/FDA.
Hello Stainless Guru's
I am an injection molder in the medical industry. We are having a rust problem on some of our 420&440 SS molds. I am trying to identify the source of the rust. the molds are cooled with 70F water and the plastic melt temps are around 400F-460F.The material is...
well if you are purgin for color changes or your materials are expensive you could use a purging compound. as far as floor spills what exzactly are you talking about, guys dumping materil on the floor or what. you could get a material handling system. more info
Hello all,
I am looking for a replacement material to use for cavity blocking in injection molding. I currently use a metal product similar to dental amalgum. I have been looking at master bond and devcon but have not found anything. The new material would have to thick enough not to run and...
