![]() Wave SolderingĪs its name implies, wave soldering is used to combine PCBs and parts through a liquid “wave” formed as the result of motor agitation. Lead or lead-free soldering should be chosen according to specific demands of products for which assembled PCBs will be designed to work. ![]() is called lead soldering, while soldering with solder paste without hazardous substances is called lead-free soldering. Soldering with solder paste that contains hazardous substances such as lead, mercury, etc. When it comes to PCB assembly, soldering is applied through solder paste. Soldering is actually a low-temperature brazing, and its filler is called solder. Brazing refers to the process in which two pieces of metal are bonded together by heating and melting filler, or alloy, at a high temperature. Briefly speaking, welding refers to the process in which two similar metals are melted to be bonded together. Prior to formal comparison between wave soldering and reflow soldering, it's of significant necessity to understand differences among soldering, welding, and brazing (Figure 1). The differences among soldering, welding, and brazing. As the leading soldering technologies for assembly, wave soldering and reflow soldering have been most widely applied to high-quality assembly however, the differences between the two technologies continue to confuse many, and when each should be used is also vague. Compared with hand soldering, automatic soldering has been widely selected due to its merits of high accuracy and speed, and the demands of large volume and high cost-effectiveness. Soldering has played an essential role in determining the success of electronic products, since electrical connections derive from precise soldering. It is particularly suitable for twisted wire soldering applications.As contemporary electronics embrace light weight, increasing efficiency, and high speed, each link of the manufacturing process also conforms to this philosophy, including printed circuit board (PCB) assembly. Metal tape is ideal for soldering wires because it has an excel-lent thermal conduction. In most processes, the kapton has to be renewed every process cycle due to its extension by the heat and to avoid re-use of polluted material. It is vital to keep the thermode clean for a constant and qualitative process. Kapton interposer is used for Hot Bar Reflow Soldering because this tape is very thin and excellent in protecting the thermode for flux and/or solder material pollution. The guiding wheels ensures the tape to be well aligned underneath the thermode. In the manual version, the operator has to feed forward the tape himself. The feed-forward length and frequency can be automatically programmed. The automated version has motors connected to its reels for the feed-forwarding control. ![]() The guiding wheels keep the tape in place and the tape tension under control. The tape is moved manually by the operator from one reel to the other. The Manual Interposer Module consists of two connected reels. The standard modules can be chosen for all Process Equipment and Desktop and Stand-Alone Systems, excluding the C-Tack laminating system. Besides the tape guiding wheels, there is a broken-tape and feed-forwarding sensing functionality. The module consists of two mechanical subassemblies, that allows to use all kind of thermode lengths in between. First, there is a choice for manual or automated inter-poser modules and in case of automated, there is a choice of having the reels at the left and right side or having both reels at the left or both at the right side. Interposer tape is used between the thermode (hot bar) and the parts, for protection reasons and/or even-pressure distribution.ĭifferent models are standard available. The interposer can be supplied as automated reel-to-reel module or manual module driven by the operator for R&D purposes. The Interposer (or Interlayer) module is a reel-to-reel system used for all Hot Bar processes.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |