Cost-effective solution for upgrading from solvent glue to UV glue

Cost-effective solution for upgrading micro speakers from solvent glue to UV glue

In the production of traditional miniature speakers, a large amount of solvent glue is used in the bonding of the diaphragm and the coil and the fixing of the leads. In some applications, the high temperature generated by high-frequency vibration, the operating temperature range of the operating solvent glue, the loose adhesion of the diaphragm and the coil, producing noise, which seriously affects the quality performance of the micro acoustic device. At present, UV glue is generally used in the bonding of high-end micro-acoustic devices, which is not as good as PHILIPS, Pioneer, etc., and many domestic medium-sized enterprises hope to upgrade the current production process to UV bonding.

Compared with traditional glue, the price of UV glue and ultraviolet light source / conveyor equipment hinders the development of UV bonding technology in China. For glue, because the amount of glue is very small, most manufacturers can still accept it. The one-time purchase cost of the complete set of UV conveyor belt curing equipment has discouraged many small and medium-sized production enterprises.

How to upgrade to UV bonding process cost-effectively?

SunRay 400 / 600W ultraviolet light source is a low-cost, compact light source module introduced by UVITRON to the market. Suitable for building customer's own conveyor belt system. Use SUNRAY 400 SM or SUNRAY 600 SM light source module to change the customer's current assembly line, which can obtain the curing performance of imported high-efficiency light source, and has lower procurement cost.

Curing performance: with 400W METAL HALIDE ultraviolet lamp, coupled with parabolic reflector, can emit ultraviolet light with UVA intensity of 100mW / cm2, effective curing width 15cm (minimum). Generally, the ultraviolet glue 1000J / cm2-1500J / cm2 for the vibration film bonding or wire bonding can complete the curing, and the curing time is about 10-15 seconds.

Low temperature performance: Since the energy consumption is only 400W, and the built-in IR filter has excellent low temperature characteristics, it will not cause overheating of the diaphragm or other components.

Easy-to-use performance: SUNRAY 400 or 600 has all the built-in components, and only requires a common power cord to start UV curing.

Mechanical interface: SUNRAY 400 or 600 is easy to install, you can use the mounting holes on the back to fix it, or design a mechanical shelf on both sides of the conveyor belt to support the light source. As long as you don't block the heat sink below.

Typical application conditions:

With 2 sets of SUNRAY 400 SM

Position of the lamp from the conveyor belt: 5cm

Conveyor speed setting: 1.2m / min

The available UV energy is about 2000J / cm2 (UVA: 320-390nm)