Welding skills and precautions of plastic encapsulated components

Date：2022-03-17 16:00:00Views：1122

Welding, which can also be written as "welding" or welding and fusion, is a processing technology and connection method that two or more materials (the same or different) produce atomic bonding between two workpieces through heating, pressurization, or both. Soldering components with electric soldering iron is a basic assembly process, which plays a key role in ensuring the quality of electronic products. The welding skills and precautions of some components are introduced below.

1. Rosin, rosin oil or acid free flux is preferred for welding. Acid flux shall not be used, otherwise the welding place will be corroded.

2. Before welding, scrape the place to be welded with a knife to make it show metallic luster, apply flux, and then apply a layer of solder.

3. When welding, the electric soldering iron should have enough heat to ensure the welding quality and prevent false welding and long-term desoldering.

4. The soldering iron should not stay at the welding place for too long.

5. After the soldering iron leaves the welding place, the welded parts cannot be moved immediately, otherwise the parts are easy to be desoldered because the solder has not solidified.

6. It's better to twist and then tin the connected component wiring.

7. When welding transistors and other devices that are afraid of high temperature, it is best to clamp the lead out pin of the transistor with small flat nose pliers or tweezers, and grasp the time during welding.

8. It is better to use thin low-temperature welding wire for the welding of semiconductor components, and the welding time should be short

Plastic encapsulated components are widely used at present, such as various switches and connectors, which are made by hot casting. This kind of components can not withstand high temperature. If the temperature is too high and the welding time is too long during the welding process, the components will be deformed and invalid.

Precautions for welding plastic encapsulated components:

1. The contact must be cleaned before welding, and the outer package must not be damaged when tin is applied to the lead.

2. The conical electric soldering iron shall be selected, and the tip of the soldering iron shall be more pointed, so as to avoid touching adjacent points or plastic packages of components during welding.

3. The welding time should be short. Do not weld a little repeatedly. Do not conduct the firmness test on the components before the plastic packaging of the components is cooled, so as to avoid twisting the shell and damaging the components.

The above is the relevant contents of plastic packaging components (welding skills and precautions) compiled by the core detection team. I hope it will be helpful to you. Chuangxin testing is a professional testing organization for electronic components. At present, it mainly provides integrated circuit testing services such as capacitance, resistance, connector, MCU, CPLD, FPGA, DSP and so on. Specializing in functional testing of electronic components, incoming appearance testing of electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components and RoHS component analysis testing. Welcome to call, we will serve you wholeheartedly!