1.The problem of solder paste printing
In the time of solder paste printing, because the solder paste printing is not flat, one end solder paste quantity is more, one end solder paste quantity is less, lead to reflow oven soldering hot melt appear time inconsistent, tension size is uneven, one end first warp.
2.Pick and place machine placement tilt or imprecise
SMD machine mount tilt or imprecise, a solder plate point mount appear one end displacement more, lead to hot melt welding time, one end hot melt fast, one end is not yet melted, appear tension different, one end is warped
Reflow oven temperature curve
3.Reflow soldering machine has 4 temperature zones, are preheating, constant temperature, heating, cooling zone, the role of each temperature zone is different, some components may be affected by uneven solder paste printing or next to a high electronic component obstruction, resulting in uneven heat absorption, thus in the heating before by temperature difference, leading to heating stage one end solder paste melted first, and the other end is not melted or solder paste melted more slowly, thus pad both ends tension is different, leading to Standing monument or warp.
The above points are some of the main reasons for the chip processing capacitor standing monument false solder, of course, there are some other complex and variable reasons, we need to pay more attention and record when the daily production.
NeoDen IN12C reflow oven features
1.Built-in welding fume filtration system, effective filtration of harmful gases, beautiful appearance and environmental protection, more in line with the use of high-end environment.
2.The control system has the characteristics of high integration, timely response, low failure rate, easy maintenance, etc.
3.Unique heating module design, with high precision temperature control, uniform temperature distribution in the thermal compensation area, high efficiency of thermal compensation, low power consumption and other characteristics.
4.Hot air convection, excellent welding performance.
5.Unique heating plate design effectively ensures uniform cooling after the equipment stops heating, effectively preventing the parts from being damaged by the rapid decrease in temperature and the resulting deformation.
.6.The internal temperature box is made of stainless steel, which is environmentally friendly and odorless, and the inner side is equipped with heat insulation cotton to effectively prevent heat loss.
7.Concealed screen design is convenient for transportation, easy to use, beautiful and generous.
8.the control system uses imported chips, temperature control accuracy of ± 0.5%
9.All temperature zones and cold air zone wind speed adjustable, easily cope with a variety of welding needs.
10.Automatic limit after the top cover is opened, effectively ensure production safety.
Post time: Jul-29-2022