No draft - one face of mold core?
No draft - one face of mold core?
(OP)
At the risk of providing comic relief....
Is is possible to have one core face completely parallel to the line of pull?
We have a very small plastic part and have (2) datum faces that must be at 90 deg. to one another. Unfortunately, one of the faces is on the mold core. The part face in question is about 8mm x 10mm. Can this be done?
Thanks.
JW
Is is possible to have one core face completely parallel to the line of pull?
We have a very small plastic part and have (2) datum faces that must be at 90 deg. to one another. Unfortunately, one of the faces is on the mold core. The part face in question is about 8mm x 10mm. Can this be done?
Thanks.
JW






RE: No draft - one face of mold core?
It helps to provide relief on the cavity side.
Also, if there is draft on the core side opposite (facing) your zero-draft wall, there will be some relief.
RE: No draft - one face of mold core?
Thanks for the info....
I was planning on adding a healthy draft angle to the opposite core face - I just wasn't sure whether or not this was a "non-starter".
Cheers,
JW
RE: No draft - one face of mold core?
RE: No draft - one face of mold core?
It can also be done with less trouble with the softer materials by blowing the part of the core with a poppet band air pressure, but once again, the sides of the cavity need to be out of the way.
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RE: No draft - one face of mold core?
Cheers,
JW
RE: No draft - one face of mold core?
It also depends on material. I have molded polypropylene parts with undercuts for snap features (lke Tupperware). With softer materials, you can count on parts deflecting through 0 degree or less.