Hi everyone.
I'm a beginer in injection mold design field. So i don't know what to do to design a mold for this part. I need your helps. Could U lead me to design a mold. I've used Cimatron to build this part. part's material is PP.
thanks for your looking.

Hi everyone.
I have a problem when design mold for this part. How do I have to solve this problem?
Could U help me?
in last post. zip attached file is igs file.
thanks for your reply.

What is your problem? The part must be desgned in a CAD program and then the tool paths created in a CAM program and processed for your CNC machine. If you have specific questions regarding your CAD or CAM program utilize the forums here or at Yahoo groups for support. In order to help you need ask specific questions and provide as much context as possible.

Thanks for Halfnutz's reply.
When i design core and cavity in, I don't know how to build ejectior mechanisms, slides, and how many plate should I use. special, How does slides act?.. for holes of this part.
Could U show me the way to desgin the mold for this part?
I'm going the end of time. :drowning:

I agree, you sure are in the deep end with this one.
Designing a mold for your part will be difficult, even for an experienced tool designer.

Tough, but not impossible. Is this a high volume, automatic mold you are trying to design? Or just a low volume prtotype mold. Low volume is easy you'll have to use some hand load inserts. Higher volume molds you could use mechanical or hydrualic slide mechanism. Might even look at lifters.

That is a tough looking part to mold.
Is there any chance you can re-design the part to make life easier on yourself?
For instance mold the smaller projection by itself, then ultrasonic weld to the main body to make the assembly.

Hi can you put your part in the mold on a angle so it slides straight off your inserts

Thanks to You, all!
This is a tough part, i'm a beginer. So I've not sovled my problem. I could'nt re-design the part
U can see over it and tell me how to win.
@mikegasman. Could u show me more suitabe solutions, above solution lead us to spen more Mold material volume. And there are another sections

I've not made a plastic mold but I would be looking at a insert for the angled slot something like this.
May give you some ideas.

This is a very nice mold. I'm watching to see how molds are made and found this Thread. It looks very difficult around that tab area.

Trying to learn something new. :cheers:

How about this a hydraulic cylinder moving a slide in and out to move your insert.

Keep the parting line normal. (due to the rib and boss on opposite end away from the angled cored area). Use a floating cavity plate with a core for the angular area. Mount the core with gibs in the support plate to allow it to move sideways as the plates separate. This is installed like an up and out, except it will be functioning opposite, down and out.

Keep the parting line normal. (due to the rib and boss on opposite end away from the angled cored area). Use a floating cavity plate with a core for the angular area. Mount the core with gibs in the support plate to allow it to move sideways as the plates separate. This is installed like an up and out, except it will be functioning opposite, down and out.
I think I understand correctly, you mean slide the portion of the cavity at the angled projection end. Wouldn't it have to slide towards the rest of the cavity because of the direction of the angle?

I will post a simple sketch this weekend, short on time right now. There is not a "slide" involved. The core actually retracts into the face of the parting line, on the angle of the undercut.

This is a really rough sketch of how the core works. You will need one on the "hot" side also. This is not the least expensive way to go. If you are looking for small quantities, hand loads would probably be better.

Wonder if this thread's still hot :-?
I'm so new of a member and just stumbled across this thread. Hope that my post is not 2 late.
Both die locks are in both core and cav, you could load the handload for the core side, but how r u gonna prevent the cav handload from crashing into the core handload when mold closes. So, it does not matter whether this mold is a prototype or not, you still need some kind of automation to slide either the cav or core handload to position when mold closes.

So, what I can suggest is:
*For prototype --> 3 plate mold which retracts and advances cav handload (slide) in/out by the first A plate.
*For production --> 3 plate with 2 stage ejection. Cavity assembly is same as above, plus actuates the slide for side groove at part's end when 2nd A plate (parting line) opens. Core plate needs to float up to activate the core hanload (now a slide on with tied to bottom clamp plate), once clear part can be ejected.
Sound simple enough? Well saying always is :)

thanhct, hope you've figured this out by now!

Thank You All.
Now, i've finished this project.

thanks for all Your help.

HI Thanhct
just post the part here and wait a few days. I will design a mold for u dear. Its not a big problem. But what software u r using for design and for CAM. Im using Pro/Engnieer Wildfire2.
U can learn a lot on design at www.mcadcentral.com

Separate the end of the male part of the mold where the angaled area is and make that part of the mold to rotate in a restricted angle movement attachet to the male part so when the mold closes the female part is pushing it the rotating section towards the male. IT WILL NOT WORK IF THERE ARE MORE THEN 1 NESTS IN THE MOLD WHITOUT HOT RUNERS.
If you send my file of the part I can help you with design.
karamitrov1@yahoo.com