Heat Gun Selection and Use in Research Labs
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A heat gun is similar in appearance to a standard hairdryer, but is operated and used in a vastly different manner. Both are constructed with a motor-driven fan that blows air over an electrically heated filament. The heating element in a heat gun typically becomes red-hot during use. Heat guns operate at lower air speeds and produce temperature as high as 1200F, hot enough to melt some types of glass.
Heat guns are frequently used in research labs to dry glassware, heat the upper parts of a distillation apparatus during distillation of high-boiling point materials, and to develop thin-layer chromatography (TLC) plates. Other applications for heat guns include:
- removing paint
- soldering
- curing epoxy resins
- removing ice accumulation
- heat shrink tubing application
- removing decals and stickers
- softening, molding and welding plastic materials
- accelerate evaporation
Basic heat guns have one heat setting and one fan speed and are designed primarily for paint stripping. More complicated models have two or three heat settings or variable adjustment within a range, together with a choice of two, three or variable speeds of air flow.
Although heat guns can produce extreme heat and are often used in lieu of a gas blow torch, the lack of a visible flame can create a false sense of security. The power switches and fan motors are not usually spark-free and can pose a serious ignition hazard. For these reasons, heat guns should never be used near flammable materials including open containers of flammable liquids, flammable vapors or hoods used to control flammable vapors.
Removing solvents and developing glass TLC plates is best done with a heat plate and forceps to manipulate the individual plates. When a heat plate is not available or insufficient for the procedure, a heat gun may be used. Never hold a sample without forceps while using a heat gun or you will risk direct exposure of the heat to your hand.
Developing TLC plates containing non-chlorinated solvents with a heat gun should be done on a benchtop clear of flammable and combustible materials, including paper towels, books, solvents and other reagents. The amount of vapor created by the process will be minimal and should not create a hazard within the lab space. Developing TLC plates containing chlorinated or toxic solvents, or developing a large number of plates at one time should be done in a fume hood that is clear of flammable materials and free of a flammable atmosphere.
While using a heat gun, the effective temperature of any heat gun can be reduced by holding it further away from the surface; however, always maintain a minimum of 1 cm of clearance between the outlet nozzle and the work surface. Having a heat gun with variable settings gives more choice and is preferred. Correct heat and air speed settings, if available, are determined by the type of work and pace best suited for the safety of the operator.
Do not use an extension cord to power a heat gun. Due to the high current draw, extension cords may overheat and pose a risk of a fire or electric shock. Never obstruct or cover the air inlet grills. If the air flow is reduced the heat gun will overheat and possible catch fire. Never operate the heat gun with the outlet nozzle directly against a surface, this will reduce the air flow and can have the same effect as obstructing the air inlet grills.
Safety considerations you should keep in mind when using a heat gun.
- Do not use a heat gun near combustible or flammable materials/atmospheres.
- Keep in mind the presence and direction of the heat produced
- Always switch the tool off before putting it down on any surface.
- Allow the tool to cool before storing it.
- Never touch the hot metal nozzle with clothing or skin.
- Never direct the air flow towards one's body
- Do not look down the nozzle while the gun is turned on.
- Do not insert anything down the nozzle of the gun.
- Never block the inlet grill or obstruct the air flow of the unit while in operation
Accidents involving Heat Guns
Accidents have occurred at Princeton University due to improper use heat guns. The two most notable accidents involved heat guns used in the presence of flammable solvents resulting in extensive damage and property loss.
- A laboratory worker was using a heat gun to heat approximately 0.5 liters of heptane in a Pyrex beaker by hand over an open bench. A splash of heptane came in contact with the elements of the heat gun, igniting the heptane and causing him to toss the beaker away from him. The sleeve of the worker's shirt caught fire. The flaming beaker landed on another work surface, spreading the fire to his computer. The worker immediately used a safety shower to put out the fire on his clothing, then used a fire extinguisher to put out the other fire. The worker received burns to his hand. The computer containing his thesis was destroyed.
- A laboratory worker was using a heat gun to accelerate evaporation of flammable solvent and develop thin-layer chromatography slides. Several stacks of paper towels, dispensing bottles of flammable solvent and 100 open vials of flammable solvent were in the fume hood where this process was carried out. The heat from the heat gun ignited the paper and vials of solvent, quickly spreading to the dispensing bottles which added more fuel to the fire. Fortunately, the worker did not sustain any injuries; however, the damage caused to the fumehood and surrounding area was valued at over $32,000.00. The researcher's reaction product was destroyed as well. The area of the lab involved in the incident was out of commission for several weeks.
If you're into DIY, this article is going to be very helpful for you. That's because today we are going to unveil the multiple talents of a device which is often feared for its high operational temperatures, but wrongly so. If used properly, this device can offer multiple uses ranging from DIY crafts to home improvement.
We are talking about heat guns, the gun-shaped device that you see at mechanical workshops and engineering laboratories. It turns out that heat guns also belong to domestic settings because of their numerous virtues. In this ‘rediscovery episode' of heat guns, you'll learn about 10 heat gun uses that go beyond the conventional ones to make life easier for you in many aspects.
Heat Gun Uses
1. Heat Gun For Paint Removal
This is one very annoying job, especially if you need to strip paint off all four walls in a room. Many people go for the chemical solvent method. This is not just frustratingly harder than using a heat gun, it is environmentally less friendly as well. So if you're a masochist, do not use a heat gun. For the rest of you normal peoples, just grab a heat gun, plug it in, heat the paint, and carefully scrape the loose paintings off. It's that easy.
Paint stripping is one of the most popular heat gun uses. If you are redecorating your home or moving to a new one, consider buying a heat gun if you don't already own one. Trust me, it will help you avoid a lot of headache. If you might need to use one outside of your home such as in your yard, I suggest getting a cordless heat gun. These electric heat guns run on battery and are portable heat guns. With one of these you can also use heat guns to strip paint off the exterior walls of your home as well as the interior.
2. Heat Gun To Soften Adhesives
Ever wanted to remove the stickers on your refrigerator, or the bumper stickers on your car, but felt afraid that it was going to come off badly and ruin the appearance of your car or refrigerator? We've all been there. Those pesky stickers just don't want to come off easily. Then one day I found out that if you put a heat gun in its low heat setting, heat the sticker for a bit, and then pull it, it actually does come off easily.
Not just stickers, this works for all kinds of adhesives including glue and cement. You can use it to remove the tiles in your bathroom, the posters on your wall, or anything really.
3. Heat Gun For Soldering and De-soldering
This one is a tough, albeit an extremely useful use of heat gun. When working with electronics you might often find yourself of the need to solder or even de-solder the wires in a circuit. You might be thinking- 'but heat guns provide so much heat it might damage the entire circuit board.' Fear not, heat gun manufacturers are one step ahead of you.
With a specialized heat gun nozzle, such as a cone nozzle, you could heat the wires in a circuit without damaging anything else. A cone nozzle is a very convenient heat gun attachment which directs the heat to a specific spot instead of a large area. It is ideal for soldering as well as other tasks that require precision heating. You can use a cone nozzle and an electric heat gun combination to use a heat gun for electronics repairs of all kinds.
4. Heat gun For Shrink Wrap
What a lot of people do when wrapping things is that they wrap the wrappings carefully around the box, then they heat up their (or their wife's) blow dryer and wait for hours as the wrappings shrink onto the box. Black shark - flight sim mac os. If you have nothing better to do, then this may be a solid way to kill time.
But if you are a busy person, may I suggest using a heat gun for shrink wrapping so that the work can be finished in minutes? This is one of the popular heat gun uses crafts. As you all know, a heat gun can heat faster and also reach way higher temperatures than a blow dryer, and thus it is ideal for shrink wrapping boxes.
5. Heat Gun For Frozen Pipes Thaw
Imagine this, it's winter and you don't want to get out from under your blankets, of course eventually you do have to force yourself out because life is cruel. You head to the bathroom, turn on the sink to freshen up… but no water comes out. This is because you have a case of frozen pipes.
Where do heat guns come into this? Of course to melt the ice in the pipes, so that the water can start to flow again. The heat gun can easily heat copper or PVC pipes and thaw it out. But be careful not to overheat it, if your pipes can't handle too much heat it might burst, and that's not such a good thing is it? Also consider using a spoon reflector nozzle for heating pipes, it makes the work much more convenient.
6. Heat Gun For Paint Drying
It can take a long time for paint to dry and cure, and if you don't have the patience for it, or need to work on the walls without messing up the paintwork, it can get frustrating. Luckily for you, a heat gun could come in handy in a situation such as this. Put the heat gun in its low heat setting and begin heating the paint for it to dry faster.
Not just walls, any kinds of paint drying can be done with a heat gun. And if the paint is near any kind of glass then do make sure to use a glass protector nozzle. Also note that you should not heat the paint too much and with too high a temperature, otherwise instead of drying, some of the paint might start stripping off.
7. Heat Gun For Shrink Tubing
Shrink tubing is just like shrink wrapping, only instead of shrinking wrappings around boxes you shrink insulation, shaped like tubes, around wires. With an electric heat gun equipped, shrink tubing is as easy as shrink wrapping.
When shrink wrapping be careful not to melt the wires in it. To avoid doing that set the heat gun temperature suitably. A temperature below 300 degrees Fahrenheit would be sufficient for the work. You should obviously check the shrink tubing box to see what temperature is recommended, usually a minimum temperate is stated on it.
8. Heat Gun For Welding
You can also use a heat gun to do welding. Home users can purchase an affordable DIY heat gun for their repair work. But more likely welding may be used for construction processes, and many professionals use industrial heat guns for this.
Welding comes in very handy during repairs. A temperature setting of 500 degrees Fahrenheit is usually enough to get the job done. When buying a heat gun for welding, do make sure that your heat gun can reach this desired temperature. You might also consider getting heat gun nozzles that are specially designed for welding, this would make the job much more smooth.
9. Drying Damp Wood
One of the super useful heat gun crafts is for drying wood that is damp or wet. For whatever reason, you may require the wood to be dried as fast possible. Heat guns come very handy in this sort of situations. You would however want it in a low temperature setting so as to not burn up the wood.
Also a very useful tidbit- if you are drying wood that is fitted with glass, such as a window or a table, you may want to use a special type of heat gun nozzle. Glass protector nozzles are a type of heat gun nozzle which does the job its name suggests. For heating wood without damaging the glass, a glass protector nozzle comes in very handy, but you would often need to buy this attachment separately from the heat gun because not many heat guns come packaged with specialized heat gun nozzles.
10. Heat Gun For PVC Pipe Bending
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Ever felt like bending plastics for no reason? No? Okay, maybe it's only me. But there are plenty of good reasons to want to bend plastics, or metals. Maybe you are doing a DIY craft at your home, or you want to change the shape of your sports equipment. With a heat gun you can easily bend the heated plastics or metal.
Many people use a heat gun for crafts because of this capability. DIY people who are home users can purchase a cheap heat gun to complete their little projects, however more expensive high end professional heat guns may be required for more heavy duty work.
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Here's a short video on using a heat gun to bend PVC pipes.
Conclusion
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So that was the list. Now after reading the article you can name a lot of heat gun uses. As you can tell from reading this, there are surely way more possible uses of heat gun. These ten are just the tip of the iceberg- well, maybe I'm exaggerating a little bit. But really, there are more heat gun hacks than the ones just mentioned here.
Heat Gun Master
If you are curious to know more, why not start using heat gun and figure out more yourself? It's useful and maybe you can come up with heat gun hacks no one else has even thought of? It's all about being innovative and creative, but be smart and careful of course- don't try drying your hair with a heat gun or anything silly like that. Good luck with your DIY or home improvement works, hopefully you'll be a master of heat gun art within a few days.