Wireless Bluetooth headsets are small, have multiple structures, and require high precision, so design is somewhat difficult. So, how to design mold for shell of wireless Bluetooth headsets?

 

1. Through slope analysis, we can see that there are undercuts in both left and right directions of product, and undercut glue position is in the front mold. Appearance requirements of Bluetooth headsets are strict, and sliders on both sides should be designed as front mold tunnel sliders; there is an inclined hole on the top of product. Considering limited mold space, needle here should be designed as a front mold oblique pull-out form. When designing front mold pull-out needle, pay attention to installation and fixation of needle; there is also an undercut inside product. Undercut inside product is considered to be designed as an oblique top form, as shown in following figure:

 

2. Since mouth of product is inverted into a circle, left and right sliders are in the form of half sliders. When designing half sliders, it should be noted that Bluetooth headset mold has high precision requirements and strict product appearance requirements. Process screw holes should be designed for this type of slider. Main purpose is to lock slider to front mold to save clamp wire. Structure is shown in figure below:

 

3. Undercut on the right side of Bluetooth headset has a certain slope, and direction of slide out of mold should be designed to be consistent with undercut direction of product; due to space limitations, T foot of slide only presses one side. When designing inclined slide, pay attention to high product requirements. Inclined slide should also be designed with process screws to facilitate locking slide and save clamping wires. Slide is driven by T-slot drive, and structure is shown in figure below:

 

4. There is an inclined hole on the top of Bluetooth headset product. In order to ensure strength of inclined slider, rear part of slider is designed to be square and connected to slider seat using a T-slot. Power source of front mold core pulling is mainly mold opening force or spring of injection molding machine. Due to space limitations, slider limit is designed on a small T block. When designing this kind of core pulling, it should be noted that at least one-third of slider must remain in slider seat after core pulling is completed to facilitate mold closing and ensure that structure will not cause danger. Structural diagram is shown below:

 

5. Movement principle of Bluetooth headset: When mold is opened, front mold core pulling is completed first by using mold opening force of injection molding machine. At the same time, inclined slider of front mold also completes core pulling action. Then inclined slider of front mold also completes core pulling. Since large inclined slider of front mold is fixed on large slider seat, after mold is opened to a certain extent, it moves with large slider. Finally, A plate and B plate are opened to eject product. The overall headset structure of front mold is shown in figure below: