how to make a mold of this part ,

Try following this tutorial and applying it to your part.

https://grabcad.com/questions/tutorial-solidworks-mold-tools

Let me know if you have any problems after that.

You can see in your file how it was done.

If you want i can do step by step for you..it's not so hard

Here it is.

You can make it in about 5 minutes.
I uses Equations but it's not necessary

i try on it but i was not able to make parting lines.
and the making draft was also having problam.

do you want step by step?

i cant open your file. which version of solid works you are using? i have 2011

i have 2015...i will post IGES file as soon as i back work...im at home now..i have lunch

its ok, fine, have a good lunch.

its ok, fine, have a good lunch.

Here i am....and your .igs file

Is it ok?

no it is not ok..... i dont know what is problem , but it is not opening. properly

i don't know how can i help you...

If you want i post step by step so you can do it your own

ok , post the steps, i will do it myself. thanks

Here it is (excuse me for my bad english)

Answered with a tutorial: https://grabcad.com/tutorials/how-to-make-a-mold-of-this-part

thanks for this and i have made this part , but i want to make a mold for this part.

Hi!
What kind of mold?
Sand casting or metallic?

hello
this is send casting yet, but i want make a metallic mold too . hope you can help!!!!!!!!

To make a mold, you can create a parallelepiped round this part and then you can use "Combine" command: http://help.solidworks.com/2012/English/SolidWorks/sldworks/HIDD_DVE_FEAT_COMBINE_BODIES.htm

Then, you can divide it

I add it in "Centrotavola.SLDPRT" and create the 2 halves "Corpo1" and "Corpo2"

is this can help u?
i just using a substract,.

HELLO...DOES YOUR PROBLEM ALREADY SOLVED? IF YOU DON'T MIND I HAVE SOME TIPS ON HOW TO SOLVE YOUR PROBLEM...WHAT VERSION OF SOLIDWORKS YOU ARE USING?

I ALREADY ATTACHED HERE THE TIPS THAT YOU NEED AND HOPEFULLY THIS WILL HELP YOU MORE.

Divide it horizontally and add draft

I,tried that Autocad command "subtract" works better than mold design in Solids Works...

In solid works use cavity command in assembly,it is best suit for mold design

raj try to study the attached files i send you. i hope this will help

I have attached both step and parasolid file. According to my knowledge this is not a plastic part. is it?

make a mold of this part and upload here