Casting Cylindr Head With Water Jacket

[jordanbull]

I have a model of a cylinder head and need to start getting it cast, how do i shell the head to leave a nominal thickness around the ports and head bolts and then turn that shell in to a solid so it can be machined in to the female water jacket halves for the sand to be pored in to give a male water jacket?????.

Also can you cut imported surfaces out of solids.???

 

[ttraser]

cylinder head casting/machining

wow. have you had training?
Shelling is rather simple, select the faces that are to be removed.
The part stays a solid part, from there you create an assembly, place the part in the assembly, Create a large block/mold part, place it into the assembly, Modify the block/mold part such that it surrounds the cylinder head, using mold tools, create cavity, with proper shrinkage, then split the part.
You should come up with 4 parts, depending on where you split it.
These are your machined mold parts.

Good luck,

I have a model of a cylinder head and need to start getting it cast, how do i shell the head to leave a nominal thickness around the ports and head bolts and then turn that shell in to a solid so it can be machined in to the female water jacket halves for the sand to be pored in to give a male water jacket?????.

Also can you cut imported surfaces out of solids.???

 

[jordanbull]

I've had a little training but there is not too much on offer down here in Western Australia.

I have donw that cavity thing but it gives a male rather than a female but if i do it again it should give me a female, it is also hard to get a good split line.

Whats the best way to cut an imported surface out of a solid.

Is there any good books that i could buy to help me with things like this.

 

[ttraser]

casting

you can "split" the surface, or create another surface or plane to "trim" to, or use the newly created surface to "cut with surface".

There is a good book, Solidworks for Dummies, but I think since you are already on molds, it might be a bit basic for you. Have you tried any "blogs".

good luck.

 

[Ody_Mech_Engr]

For castings, not only do you need to consider machining, but shrinkage. Any pattern would need to be sized to allow for shrink during cooling.

My advice is to create a new configuration in your part. It sounds like you have a solid for your machined and finished part. What I've done in the past is to take that, create a new configuration, then add features to create a cast part. You can use an extrude to fill in a portion of the bolt holes. You can also offset the surfaces or alter dimensions for that configuration ONLY to create a better pattern that is still parametric to the finished part requirements. You can even create features for gates and the like.