You cannot go anywhere today without seeing devices designed to keep all people in touch with each other. Whether shopping or driving down the road most people you see are either texting or talking to family and friends. All of the electronic devices being used have one thing in common and that thing is circuit boards of varying sizes. One of the specialty machines used to help create these boards is the reflow soldering oven.
Using this machine companies can solder two flat parts together permanently. To do this the machine operator uses powdered solder and places it on the circuits at precise points on a board. When preparations are complete the boards are placed in ovens and heat is applied to melt the solder. This action is permanent and special steps must be taken to insure proper results.
The first zone is a preheat period where the boards and other components are heated to determine the ramp up rate. If the boards and circuitry heat up too fast it can cause damage to the components from thermal shock causing cracking and also spattering of solder paste. If the heating process is too low the needed evaporation of the flux in the paste will be incomplete.
A thermal soak zone is next in the process. This soak usually lasts no longer than two minutes and is designed to remove paste volatiles and activate the flux components to begin oxide reduction on leads and pads of circuits. Again the temperature must be precise to prevent spattering or balling of solder from heat that is too high. When the soak is complete a thermal assessment of the entire board is required before it moves to the next zone.
Next is the reflow zone. This is one of the most sensitive zones in the process. It is when the highest temperatures will be used on the board. Every piece has a temperature where the most fragile component is damaged by heat. If this temperature is surpassed thermal damage will occur making the piece non-functional. Operators must closely monitor the process to ensure this does not happen.
The cooling zone is the final part of the process. The boards are allowed to cool slowly while the solder becomes a solid again. This procedure is not monitored as closely as the others and many consider it to be less critical that the first three steps. Experts disagree with this concept and advise that the boards be cooled in controlled conditions that help to deter thermal shock to boards and components alike.
This equipment can be large or small in size. Some of the more compact units are called surface mount technology because they can be seated on bench tops. Others are much larger and can measure over six foot in length. Nearly all of these units supply some means for technicians to monitor what is going on inside while the machine is working. Some provide windows and others allow for computer hook ups with USB outlets.
These ovens make it possible for you to enjoy the technical electrical gadgets that make life easier. As the technology advances they will become more streamlined and advanced to keep pace.
Using this machine companies can solder two flat parts together permanently. To do this the machine operator uses powdered solder and places it on the circuits at precise points on a board. When preparations are complete the boards are placed in ovens and heat is applied to melt the solder. This action is permanent and special steps must be taken to insure proper results.
The first zone is a preheat period where the boards and other components are heated to determine the ramp up rate. If the boards and circuitry heat up too fast it can cause damage to the components from thermal shock causing cracking and also spattering of solder paste. If the heating process is too low the needed evaporation of the flux in the paste will be incomplete.
A thermal soak zone is next in the process. This soak usually lasts no longer than two minutes and is designed to remove paste volatiles and activate the flux components to begin oxide reduction on leads and pads of circuits. Again the temperature must be precise to prevent spattering or balling of solder from heat that is too high. When the soak is complete a thermal assessment of the entire board is required before it moves to the next zone.
Next is the reflow zone. This is one of the most sensitive zones in the process. It is when the highest temperatures will be used on the board. Every piece has a temperature where the most fragile component is damaged by heat. If this temperature is surpassed thermal damage will occur making the piece non-functional. Operators must closely monitor the process to ensure this does not happen.
The cooling zone is the final part of the process. The boards are allowed to cool slowly while the solder becomes a solid again. This procedure is not monitored as closely as the others and many consider it to be less critical that the first three steps. Experts disagree with this concept and advise that the boards be cooled in controlled conditions that help to deter thermal shock to boards and components alike.
This equipment can be large or small in size. Some of the more compact units are called surface mount technology because they can be seated on bench tops. Others are much larger and can measure over six foot in length. Nearly all of these units supply some means for technicians to monitor what is going on inside while the machine is working. Some provide windows and others allow for computer hook ups with USB outlets.
These ovens make it possible for you to enjoy the technical electrical gadgets that make life easier. As the technology advances they will become more streamlined and advanced to keep pace.
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