Grille Injection Mould

The grille molding tool was made in great performance such as smooth mechanical motion, optimal gating system, excellent cooling system and efficient air venting. The mass production capacity with its fixed half precision reaching ±0.015mm and surface finish Ra0.05~0.08 makes it world class level. There is some basic information can be read in table bellow:

1\ Injection molding process to control weld lines for grille product with complicated structure.

2\ Multiple sequential nozzles hot-runner used to overcome the difficulty that radiator grille product deforms in huge quantity. The excellent result we controlled the deformation within 0.5mm was over customer's expectation.

3\ As the grille tooling requires high precision for its parting surface, we made effort to control machining equipment precision, cutting tool wear and tear, material stress deformation, CAM programming tool path and so on to get it ±0.005mm at last.

Many tool makers may encounter when they have the injection area around 80% at grille mold test, the ejection fails. Yes too many ribs may influence while the main reason probably designer may only consider the ejecting mechanism when totally injected.

So what to do to prevent? We request the tooling designer to set up a sufficient ejecting mechanism that part can be ejected smoothly when the injection area starts from 60% to 100%. and before that using mold flow analysis for filling simulation of 60% to 100% to find the most proper ejecting layout.

The diagrams above show ejecting layout and injection filling area of 80%, and we had it for verification specially when it was 60%, 70%, 80%, 90% and 100% at tryout, resulting in great ejection without any sticking.

We apply Rapid Heat Cycle Molding (RHCM) process which use steaming assisted injection technology to make the products with gloss finish but good avoiding of defects.

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