Based on our experience 8-10 years ago with S-7 steel cast molds
tolerances were much like investment casting. We did a compression
mold to produce an impeller. We had to add .030" machining stock to
all the vane surfaces and later machine to specified tolerances. So I
am curious to learn if Sarco's process is applicable for small more
accurate parts as opposed to large tire molds. By the way we have had
tremendous success casting aluminum molds using ceramic intermidiate
molds. Dimensionally very predictable. But that's not steel. So the
fact they are using P20, H13 and stainless has me curious to
understand other limitations (if any).
Jim
______________________________ Reply Separator _________________________________
Subject: Rapid Tooling for Plastic Injection
Author: selecteng@novagate.com at INTERNET
Date: 10/8/98 3:24 PM
We have found a source to do rapid tooling for plastic injection molds
that can handle larger sizes than the Keltool process. I believe they go
up to 24 inches by 24 inches and can produce a core or cavity up to
1,900 pounds. They use a similar process as Keltool, but make a ceramic
intermediate tool. They have a choice of 13 tooling material, such as
P-20, H-13, and stainless steel. I had seen a mold they built for a farm
tractor tire. It consisted of about 15 large segments and had the tread
pattern and all the little vents in it. Their delivery time is about a
week. They have experience working with STL masters.
The company is:
Sarcol Inc.
3050 West Taylor St.
Chicago, IL 60612
313 533-3000
313 533-3004 FAX
Contact: Jim Larson
Disclaimer: I have no interest in this company other than as a vendor.
Ross Gates
Select Mfg. Services Inc.
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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