Countermeasure against deformation in box molded product

Time: 2020-08-11
Summary: Generally, warpage towards inside tend to be bigger as the span get longer, and it tend to be bigger on the long side, compared to the short side. Remedying by placing a rib on the inside, or placing a triangle rib on the corner part, is possible.
 Countermeasure against deformation in box molded product

1) Generally, warpage towards inside tend to be bigger as the span get longer, and it tend to be bigger on the long side, compared to the short side. Remedying by placing a rib on the inside, or placing a triangle rib on the corner part, is possible.
(2) Strengthening shape stiffness of the edge part is also effective. Especially effective in GF reinforced grade.
(3) Core cooling is highly effective. Core cooling countermeasure should be considered well.
(4) Pin gate is a little better than the side gate in many situations. 
Warpage towards inside

(A) Reinforcing by placing rib 

(B) Reinforcing sidewall 
(C) Reinforcing by band rib
(D) Reinforcement examples of edge part
Figure 3-10 Example of countermeasure against warpage deformation in box molded product 

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