Thin wall molding is actually defined as molding the parts having wall thickness 1 mm or less than that. Speed plays most important role for the high profit in the field of thin wall injection molding. Faster filling and higher pressures are required to drive molten thermoplastic material into thinner cavities at a sufficient rate to prevent freeze off. For this machine equipped with accumulator to realize high speed injection and single cylinder injection system, especially suitable for high speed injection, with low inertia and high response speed is required.

SINO HOLDINGS GROUP is extensively experience in the field of thin walled injection molding and has manufactured super advanced mold and molding machine involving to meet the match today and beyond. Our high speed machine can reach 2.5 sec of cycle time to produce 4 cavity thin wall box of 0.4 mm wall thickness. Not only mold and machine we offer whole production line in cost effective way.

But the fact is, thin wall molding is very difficult to deal with.Much many thing are to be considered while designing tool for thin walled injection molding.

1: To withstand high injection pressures gate inserts of hardness greater than 55 are typically used .

2: Manifolds should have external, not internal, heaters. Valve gates, if used, must be non-restrictive and built to take high pressure.

3: Venting is critical and can be facilitated with vented core pins and ejector pins,While not usually necessary, some processors have sealed the parting line with an O-ring in order to pull a vacuum on the cavity for quick gas evacuation.

4: Nonlooping cooling lines should usually be located directly in the core and cavity blocks to help keep the mold surface temperature as consistent as possible.

5:When gating directly onto a thin wall with a sprue, pinpoint, or hot-drop, use gate wells to reduce stress at the gate, aid filling, and reduce part damage when degating.

6: The mold cooling system design must be optimized so that heat is extracted quickly. Just having thin walls on a part is not enough to get fast cycle times.

7:Any build up of residue across the venting surfaces will result in part quality issues especially on multi cavity moulds.

Rahul shah

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