PP mould for the 71/84 Mauser

[Chicken Thief]

I promished a member to post pics of how i did.

Start of the reamer
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010518.jpg

Boolit shape finished
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010519.jpg

Flutes cut
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010520.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010521.jpg

I pre drilled the void and reamed to finish
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010522.jpg

Jig for centering the sprue plate
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010523.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010524.jpg

Sprue plate in place
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010526.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010527.jpg

To be continued.

[Chicken Thief]

Threaded hole for handle
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010528.jpg

Handle
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010529.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010530.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010531.jpg

A few test casts to get the weight right
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010533.jpg

A stop screw i do not need (Stoopid me overthinking it), the sprue plate will stop on the rim
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0010535.jpg


I found out that it was difficult to eject the cast boolit so i thought up this "nose punch".
I drilled the die completly through for the small diameter of the ejector.
Then "drilled" with a mill the hole for the "head" of the ejector to the correct deapth.
I then incerted the ejector and reamed the cavity till the reamer met the ejector, thus avoiding rings or other strange shapes on the boolit nose.
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0011274_zpsa6143a32.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0011276_zpsbe79f4e8.jpg
http://i295.photobucket.com/albums/mm153/Chickenthief/Skydning/Mauser%2071-84/R0011277_zps462effc0.jpg

[dominicfortune00]

Chicken Thief

Very nice!

[Chicken Thief]

Hope you can use it mate.

[Buckshot]

............Chicken Thief that's some good work. I'd like to offer a couple alternatives that might help in further mould work. If you are going to be plunging a reamer you really only need one flute. In essence it's a 'Form Tool'.

http://www.fototime.com/FBC4A50229228CB/standard.jpghttp://www.fototime.com/129DCEECEED65CD/standard.jpg

LEFT: Form tool. A single flute tool. RIGHT: Plunging the tool into the work which has had the majority of the material removed. This was making a swage die. The circular die body is in a 4 jaw chuck. The beauty of such a tool is that it may be used for most ANY OD you might need via feeding out with the cross slide or compound.

http://www.fototime.com/EC6E32186093ED1/standard.jpghttp://www.fototime.com/6DD15BDBE5D31B1/standard.jpg

Another way to accomplish the same thing is by using a LEFT: face plate. In the photo I have a insert milling vise attached to the plate. It requires attachment of counterwieghts if you're going to spin it at any speed at all, and it's only benefit is once set up it's VERY repeatable. However by substituting 2 precision angle plates with the mould blocks captured between them, the off center load is minimized and no counterweights are required with reasonable spindle speeds. RIGHT: These slugs are the results of the swage die produced via the single flute form tool.

A very simple way to produce form tools is to purchase "Half Drills", otherwise known as "D" reamers. They're nothing more then single flute reamers. The commercial ones are naturally made of high speed steel, so are ready to use once ground to shape.

http://www.fototime.com/822F5471FA0DC35/standard.jpghttp://www.fototime.com/B55E2CC4F2DF8E0/standard.jpg

LEFT: Kind of intuitive but a picture is worth a thousand words as to the use of a single flute form tool. RIGHT: Some commercial half drills. They're fairly spendy to buy from a tool catalog but can be found on E-Bay from time to time at comparatively reasonable prices. Ditto drill or reamer blanks, but of course they have to be ground in half for use as a form tool. However they're very valuable for grinding to create lube grooves, or other features when boring 2 piece mould blocks.

................Buckshot

[Chicken Thief]

Thanks for the tips Buckshot http://i295.photobucket.com/albums/mm153/Chickenthief/Blandet/Smilere/A.gif