The mode of embedding the nut；
1. Hot melt nut- use Heat Staking Machine
Hot melt embedding is the most common and common embedding method, generally with hot melt machine and manual electric soldering iron embedding nails.
2. Injection nut- use hot plate welding machine
Injection Molding embedment is usually strict on the nut diameter. The diameter control is within 0.05mm because the product is fixed with the Molding Pin and placed in the injection Molding mold. The nut diameter should be controlled by the Pin size of the injection Molding machine.
3. Ultrasonic nut – use Ultrasonic plastic welder
Ultrasonic embedding is a kind of ultrasonic vibration, so that the friction between the nut and the surface of the workpiece and the internal molecules and the temperature of the interface increases, when the temperature reaches the softening temperature of the workpiece itself, the nut embedded in the rubber, when the vibration stops, the workpiece at the same time under a certain pressure cooling shape.
Plastic hole design and nut selection；
Design of nuts
Design of plastic parts
Remark：
D: outer diameter of the nut
D: base of the nut
W: plastic hole wall thickness
L: length of the nut
C: plastic hole diameter
Y: plastic hole depth
1. D size is the nut base, also known as the guide positioning part, which is coordinated with the plastic C part before embedding, so the bottom D part of the nut is smaller than the plastic BOSS inner aperture C size to facilitate positioning;
2, D size for the nut outer diameter, it matches the plastic BOSS inner aperture C size, the general mobile phone nut plastic inner aperture is smaller than the nut outer diameter of about 0.25-0.3mm;
3, L size is the length of the nut, it is matched with the plastic BOSS hole depth Y size, the general plastic hole depth is higher than the screw (length) 0.5-1.0mm depth for glue storage;
4, W is the plastic hole wall thickness, the general plastic BOSS hole meat thickness is more than 0.8-1.0mm, the larger the nut size specification, the larger the plastic product wall thickness.
If you have any questions about ultrasonic welding or hot melt embedding, please feel free to contact us
Post time: Sep-30-2022