Sid,
What we suggest to our clients is this: generate an e.g. pdf file with ALL design notes (the more the better) and tolerance requirements, attach it to the 3D design and indicate the latter must not be used w/o the former. The tolerancing issue is rather simple if we refer to (attach) the...
All,
Thank you for your continuing feedback. We folded a few times the living hinge (attached to apx. 7*8*2.5 inch tall box halves) as soon as it came out from the mold causing high level of advantageous molecular orientation and it worked flawlessly without delamination. One time folding was...
Paul, thank you for your feedback, we plan to 1.compute/try faster injection, 2.increase lining hinge thickness while computing the major principal strain in it to stay as far away as possible from the material's elongation(strain) at break value and 3.relocate the gate as the last resort...
George,
Since the laser cutting introduces significant heat at the cutting lines(surfaces) that leads to a new energy equilibrium of the polymer causing warpage, you may want to consider less intrusive cutting methods like CNC with low feed rates or water jet cutting.
George
G. Markus...
We experience severe living hinge delamination problem. We suspect excessive 1.Frozen Skin formation and the consequential 2.high Shear rate/Shear stress during filling due to hesitation flow in the hinge caused by apparently improper gate location. The latter is too close to the hinge...
I suggest designing the thermal conditioning (cooling) of both sides of the cavity properly. The distance between the edges of the cooling channels and the molding surface (EDGE-TO-PART (E2P)) should be >= EDGE-TO-EDGE (E2E). E.g. 0.8"(better: 0.45") E2P with 0.7(better: 0.4") E2E for steel...
