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Study on Melt Flow Length in Injection Molding Process with Induction Coil Heating for Mold Temperature Control

In the field of dynamic mold temperature control for injection molding, the heating coil is one of the fasted methods for heating the mold surface. This method had got more attention from researcher. In the field of plastic manufacturing, as products become thinner and smaller, it is difficult to manufacture them using conventional injection molding (CIM), because heat transfers rapidly from the melt to mold wall due to part’s thinness. Increasing the mold temperature, melt temperature, or packing pressure, it increases the cycle time. There are two definitions of “thin-wall” parts: a part with a thickness below 1 mm across an area greater than 50 cm2 [1, 2]; and a flow length to thickness (L/t) ratio greater than 100:1 or 150:1 [3, 4]. To fill the cavity in an extremely short time
before the formation of the skin layer in thin-wall parts,
injection machine manufacturers have developed machines
for high-speed injection, and this process was called highspeed
injection
molding
(HSIM)
[5,
6].
The
object
of
HSIM
is

to

fill the cavity in an extremely short time. Hence, a higher
injection pressure, a stable controller, and rigid steel for the
injection machine and mold are necessary. However, the HSIM
has some disadvantage as the expensive injection molding
machine, as well as the mold price.

Từ khóa: Study on Melt Flow Length in Injection Molding Process with Induction Coil Heating for Mold Temperature Control, Pham Son Minh, Nguyen Thanh Hon, Nguyen Hoang Quan, Cao Văn Minh Tu, Tran Van Truong

6 p ovanke 09/05/2019 342 1

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