Because the LED photoelectric oven appearance and principle technology content is not very high, so there are more fish in the market, and the price is also quite different, so sometimes I do not know how to match.
First, we need to understand the temperature requirements in the LED packaging process. In the LED packaging process, such as the packaging process of LED lamps, the early LED bracket baking, the silver paste curing after the solidification process of the dispensing process, the short baking (pre-curing) after the potting, and the long baking (post curing) are required. Go to the oven, and the ovens in these processes can't be mixed to prevent problems such as glue poisoning, silver glue vulcanization, and pollution. Pay attention to the following matters when purchasing LED ovens:
1. The oven must be a hot air circulation oven , because the temperature uniformity of the hot air circulation oven is good, the oven with poor uniformity will cause foaming after the glue solidifies, the color difference of the phosphor appears, and the warpage of the bracket substrate is not equal after baking. The problem is that the temperature of the commonly used hot air circulation oven is between 80 ° and 175 °. Therefore, pay attention to the temperature range when purchasing the oven. The oven's way of winding is best to use an oven with a horizontal and horizontal wind structure. The oven of this structure is less affected by the quantity of products placed.
2. The LED package oven should have a heating timing function. Because the baking time is required in the process of production, the baking time is too short, the glue can not be completely cured, the baking time is too long, the glue hardens, cracks and degumming. In addition, it is best to achieve a temperature rise of the thermostat, which can be achieved by adjusting the heating rate to solve the glue curing requirements of different products.
3, pay attention to the requirements of the cleanliness of the oven. The hot air circulating oven generally adopts a stainless steel inner tank. It is best to use internal full soldering products. The vibration of the machine is small. In the glue curing process, the glue or the product will not vibrate due to the vibration of the machine, and the surface is not flat.
4, buy attention to the problem of the air intake vent. Silver glue, epoxy glue, brackets and other materials are all easily oxidized products. Silver glue and glue baking will produce harmful gases. The baking process should not exchange with the outside air as much as possible to prevent problems such as poisoning and vulcanization in the glue. Therefore, the oven The air inlet and outlet are preferably adjustable and need to be closed during the baking process.
Shenzhen Yihexing Electromechanical Technology Co., Ltd. main products are LED automatic glue filling machine, all kinds of professional ovens, vacuum boxes, moisture-proof cabinets, products for LED packaging, lighting, electronics and other high-tech fields, is the photovoltaic industry and electronics industry Preferred brand.