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This weekend's efforts

sfurini

Graduate Member
Joined
Sep 1, 2015
Posts
478
Location
United Kingdom
First Name
Stewart
Hi all
Haven't had anything to post for a while but this weekend I tried casting some polyurethane resin to see if it was the same as alumilite which I was told was a urethane resin...

Anyway, the blanks cast in much the same way and as quickly as alumilite. First picture is them straight from my rough and ready mould shown in an earlier post. I then turned them round this afternoon to see how the colours had worked out. Most look ok, bot on of the blue and white blanks didn't get a colour mix all the way through.

I haven't tried threading yet but will give an update when I have.

I also made some masters for making some more moulds to cast parts for making wooden pens - they'll be in the inserts for the barrel, the cap and a nib blank (these ones will be roller balls but I might get on to making some wooden fountain pens too). I know I could make the inserts from plain cast resin but I'm trying to minimize waste...

Castings 281115.jpgCastings Rough Turned 291115.jpgKit parts for casting inserts.jpg
 

Bigblackdog

Registered
Joined
Dec 28, 2014
Posts
839
Location
Leeds
First Name
Mark
i will be interested to see how the resin will take a thread, and how the inserts work out. I had wondered about turning an insert for the same purpose, but I had planned to use ebonite.
 

Jim

Grand Master
Joined
Oct 19, 2011
Posts
15,617
Blanks look pretty decent Stewart, interested in seeing the final results ..
 

sfurini

Graduate Member
Joined
Sep 1, 2015
Posts
478
Location
United Kingdom
First Name
Stewart
Here's an update - did some threading on one of the blanks this evening. Just to be accurate, the resin I used was Polycraft SG2000 from MBFG.

It threads very nicely indeed - as far as I can tell, exactly the same as alumilite. Here's the best I can manage with my phone camera of the threads and a shot with a rather manky section, though the nib is great :winking:

2015-11-30 18.52.37.jpg

2015-11-30 18.53.24.jpg
 

Artfulpens

Apprentice Member
Joined
Nov 6, 2015
Posts
18
Location
United Kingdom
First Name
Tor
Good work on the casting on these, i am trialling something similar with ECPU 3691 (Slow cure) Polyurethane Resin and it looks "OK" so far. doing another batch later in the week, machining works well.

Good luck
 
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