Headset band

Product: Headset band

Material: PC

No. of Cavity: 1X1

Product Characteristics: Simple shape, complex structure, with minimized parting line.

undercuts in plastic injection molding product

1.First of all, perform slope analysis. The following figure shows that the plastic injection mold has 4 undercuts.

undercuts in plastic injection molding product

2.The following figure shows that the mold has another 3 undercuts. That’s 7 undercuts in total

3.According to thickness analysis, the basic wall thickness of the product is 2.3mm.

undercuts in plastic injection molding product

4.It is determined that 2 sliders are placed at undercut 1 and undercut 6 respectively (slider 1 and slider2).

sliders for plastic injection mold

5.Undercut 2 and undercut 5 are located inside the product, so inner sliders are applied, which will work with the mold base and the 1 more plate for 2-stage ejection.

slider for plastic injection mold

6.It is determined that undercut 4 and undercut 7 will be released through the application of slider 5 and slider 6.

slider for plastic injection mold

7.There is no undercut at the location of slider 7, but the slider is applied to meet the requirements for minimized parting line.

slider for plastic injection mold

8.Undercut 3 adopts the lifter design for release. Since it is surrounded by sliders, undercut 3 is subject a weak clamping force, so ejection will be performed by the lifter.

a lifter for the headset band

Through an overall review of the mold, we can come to the conclusion that this a very simple product with a very complex structure. In total, 7 sliders and a lifter are employed.

 7 sliders and 1 lifter for a mold