Useful Tips

How to fix broken plastic products


My son (8 years old) wears tooth plates, yesterday, while brushing his teeth, they saw that the plate does not have a mustache. The son cannot say how he broke off - either swallowed, or he fell away during the cleaning. Our doctor is on vacation. What should we do? Thank!

Good afternoon. You need to contact any dentist with an orthodontist and order repair of your plate.
Dear mom, if the record is fixed, then I recommend to wait of his Doctors, the clasp is not fundamental in its action.
Good luck to you.

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Comments and reviews 49

A piece of iron broke off on the bilinear plate below, can I fix it?
To answer

Depends on the place of breakage. Refer to the orthodontist, if the metal element performed exclusively a retaining function and after breakage, the fixation in the oral cavity was not broken, a small correction can be dispensed with. If this element performed a therapeutic function, the device must be replaced, as it has lost its functionality.
To answer

General Dentist

The plate has broken, do I need to change or repair the plate?
To answer

In some cases, the efficiency of the plate apparatus in the event of a breakdown is reduced. It all depends on the nature and place. Also, broken edges of the device can injure the mucous membrane of the oral cavity. Consult your healthcare provider for recommendations.
To answer

General Dentist

My right clasp on the plate broke. Nothing presses me, I feel comfortable. Do I need to change the plate?
To answer

There is no need to completely replace the plate. You can fix the device. A cast is taken along with the device and the technician fixes it.
To answer

General Dentist

Tell me, why is the clammer breaking on the plate? Is it the child’s fault? Or manufacturing defects?
To answer

Clasps for removable plate apparatuses are made of special wire. Their breakdown is most often caused by bruxism in the child (gnashing of teeth), excessive jaw clenching, and also sometimes through negligence, quite often children play with devices (remove, put on the tongue in the oral cavity), because of this, the metal can wear out over time, and due to and break.
To answer

General Dentist

Please tell me, we wanted to see how many revolutions were left until the plate was completely untwisted, and it was divided into two parts. Can it be twisted or repaired? Thank you so much!
To answer

Two halves, you can try to compare and start making turns in the opposite direction. But in practice, it is not possible to repair the device on its own in such a situation. Contact your doctor, it is more likely to require either relocation or the manufacture of a new design.
To answer

My victories

Look at the number of things that could just be thrown away, and which I saved from this fate, giving them a second chance:

  • glasses
  • chairs,
  • buckets
  • kitchen containers
  • toys
  • handles of cabinets and refrigerators,
  • hair brushes
  • shoulders
  • sandals,
  • car parts
  • electronic cabinets
  • badges and many other items.

The list is endless. So, let's find out how they can be welded, and for this I need to tell you about the soldering technique, which is suitable for most cases.

Soldering technique

In most cases, you only need:

  1. Soldering iron. A simple flat tip used in tin solder electronics.
  2. Respirator. To protect the respiratory system from plastic gases (a fume hood is the best solution).

If your plastic is thin, a piece is missing, or you need to make it liquid tight or restore the safety of electrical appliances, you may also need:

  1. Disposable plastic strips.
  2. A paper clip or wire.
  3. Super glue, solder clips or another way to hold parts in place where you weld them.

Important! Some plastics under the influence of sunlight break down quite easily and collapse on their own. In these cases, welding will not help.

Preparing a soldering iron

  • Models with a temperature controller. There are many types of soldering irons and soldering stations. In addition to the usual classic, there are a number of models in which you can set the desired temperature. If the plastic is heated too much, it may lose its original properties, weaken and break. Also, exposure to high temperatures causes the formation of toxic smoke.
  • Flat tip models. For soldering plastic, it is best to use a flat tip. But if it is not, you can flatten the existing one. You can do this by first tapping it with a hammer, and then squeezing it in a vice.

I am preparing additional material

Is your plastic too thin or has holes? Then you need to use plastic parts to add material to the original plastic. The best option is to take strips of plastic of the same type that you weld.

But if this is not possible, the photos above show simple solutions to this problem:

  • cut from thin plastic parts such as shampoo bottles, pet bottles, etc.,
  • use plastic zippers or plastic cable ties for wiring,
  • remove the rim from the PET bottles.

Amplify details

Despite the fact that during the repair process very strong plastic welds will be made, in some cases even a small constant voltage can again break the repaired item.

To avoid this:

  • I fasten the most loaded sections with the help of metal staples of a construction stapler.
  • I solder perpendicular plastic amplifiers.
  • Reinforce the seams with thick wire.
  • Imposing amplifiers from aluminum foil from beer cans.

I fix the details

If there are difficulties when soldering, then it is necessary to securely fix the parts to be welded. To do this, you can use special solder clamps or superglue to temporarily connect them in place before soldering.

I protect the respiratory system

Here are some tips to avoid the harmful effects of smoke:

  • Use a respirator.
  • Solder at head level and above (smoke will go up, bypassing the respiratory system).
  • Use any fan as an exhaust fan.
  • Using a soldering iron with a heating control, reduce the temperature when smoke appears.
  • As an alternative to a soldering iron with a regulator, you can connect the plug to the voltage regulator to reduce the power and temperature of the tip.

Gloves and glasses:

  • Gloves can protect you from burns - some soldering irons reach temperatures around 600 ° C.
  • Do not forget to protect the lenses of the plastic glasses from accidental heating with a heat-resistant transparent coating. It is best to use glasses with glass lenses.

Start soldering

The secret to successful repairs is to melt the plastic at the break point so that both molten parts join together, literally welding themselves. Here is how I do it:

  1. I put the tip of the soldering iron in the place of the fault.
  2. Pushing it forward a bit to form a molten plastic mass along the fault.
  3. I repeat this again after the last formed part, to make another mass next to the previous one.
  4. The result is a good weld, reminiscent of the seams formed during welding of metals.

When the fixed parts are too thin or to fill in any missing part, I usually add more plastic:

  • I place a plastic strip over the part to be fixed.
  • I warm it with a soldering iron until the soldered parts and the strip begin to melt.
  • I press the strip into the fault and lead the soldering iron further to the place of welding.
  • If necessary, add metal amplifiers to make soldering stronger. You need to do this at the moment when the plastic is molten - press the metal until it enters the plastic.

Important! Remember to check the other side to make sure that the metal has not passed through plastic. If this happens, you will have to cover the other side with plastic.

Finish. After performing a weld, sometimes you want to refine it to make it less noticeable. To do this, I go through the top with a soldering iron, smoothing the flows.

Testing. First, let the product cool, and then proceed to testing the welds. A good way to check is to use in extreme situations, for example, sit on a chair, or maybe jump a bit.

Here is a list of my recent trials:

  • The plastic box, which was in some pictures above, proved to be rather weak. A simple fall from a low height broke it, so I had to redo the work 4 times, adding 8 metal amplifiers, until the box became strong enough.
  • Lid for a kitchen container made of PET. I managed to fix this damage in 1 time - I could not break it with my hands.
  • The PVC tube also became very strong after it was repaired, even with rigorous tests.

Advice! What should I do if the seam bursts again during the test? Do the job again, but adding more metal and plastic, melt it deeper.