Advice 1: How to melt plastic

In case of breakage of any plastic parts a try yourself to fix it. However, not all succeed. Since the choice of connection method it is necessary to consider the rheological properties of plastics and their type: legkousvaivaemyh, trudnosmyvaemye or those that do not apply the method of fusion welding.
How to melt plastic
Instruction
1
Many people try to melt the piece of plastic in the pan in a water bath and then pour and connect the seams. The surface may be deformed, and the seam is not reliable and not durable.
2
When you try to fuse plastic fragments soldering iron, be very careful as the melting point in this case is exceeded and the seam becomes brittle and fragile.
3
It is better to use a special electric gun that melts plastic. Along with the gun you need to buy plastic rods, with which comes the filling up of the seams.
4
You can use a professional or semi-professional dryer, continuously adjustable temperature and airflow. Additionally you need attachments for welding. It is necessary to clean both sides of the weld. Pick up the welding rods according to the composition similar to the material of the fragment. If possible, make a test weld to check the compatibility of materials, and for selecting the required heating temperature, the speed of the dryer and the force of indentation. Run the dryer for 10 minutes to stabilize the temperature of the hot air.
5
Fold the pieces of items and secure in position using special clamps-clothespins. Sharpen the end of the rod to facilitate the initial stage of welding. Tilt the rod at a 45° angle during welding, or use the speed welding nozzle. The use of the nozzle facilitates the welding process because it has a fixed position, as for bar and Hairdryer. In the work a little prodavlivaet rod. As a result, you should get a smooth seam, rising a little above the surface. After complete cooling it is necessary to Polish the seam and repaint, if necessary.

Advice 2: How to paint plastic

Painting plastic at first glance is a simple matter. In fact, to painted plastic to look nice, you need to know some details of the preparation and the painting of such products.
When painting plastic, you must follow certain rules
Instruction
1
First of all you must carefully prepare the surfaces that you want painted. It should be clean and dry, without residues of the hydrophobic grease and other contamination. Additional training is not required unless you plan to paint polystyrene or ABS plastic water acrylic paints.
2
If you need to dye polypropylene or polyamide, the surface of the plastic must be pre-treated with adhesion promotor for polypropylene, which is applied by spraying or wiping. After that, the promoter must be allowed to dry for 1 minute.
3
Remember that the temperature of the dye, plastic and painting equipment must be the same. The ideal room temperature should be not less than 18 degrees Celsius at humidity of 80%.
4
As a rule, the painting is done in a single layer with a minimum thickness of 60 microns. If you make a film of lesser thickness, it may affect the adhesion of paint to the plastic. If you paint the surface of a thickness of > 120 microns, it will lead to a significant increase of the period of drying, which in turn may adversely affect the decorative effect of the coating.
5
Drying of polystyrene and ABS plastic, it is possible at a temperature of from 18 to 60 degrees Celsius. For example, when the wet film thickness of 80-120 microns and a temperature of 50 degrees Celsius (humidity about 65%) the drying time is 2-3 hours. If you dyed polypropylene and polyamide, at a temperature of about 100 degrees Celsius drying will occur in about 20 minutes.
6
It should be remembered that the cured paint coating on plastic is about 5-7 days. It is a big thick wet layer, low temperature drying and high humidity can increase this period several times.

Advice 3: How to make plastic

Plastics in the home can be easy and fun to implement, using whatever tools were on hand. And due to the fact that one of the necessary materials to make plastic – Styrofoam – you also help the environment with their experiences as secondary use of non-degradable materials.
Home chemical laboratory is a valuable experience
You will need
  • - acetone
  • - glass container with lid
  • - Styrofoam
Instruction
1
Remove the lid from the glass container and pour in a small amount of acetone (approximately 1.25 cm from the bottom). If need be, add more later.
2
Break the Styrofoam into small pieces and throw them in a container of acetone. Material in contact with the liquid will begin to dissolve. If you need to get more plastic – just add a little acetone, and then crumble more styrofome.
3
Wait about 5 minutes to allow the excess acetone to evaporate. If you want to give the plastic some form, wait an extra minute – by this time, the plastic will be easy to succumb to the moulding. Plastic ready, you can sculpt.

Advice 4: How to solder plastic

One method of repair chips and cracks on the plastics – epoxy resins. However, professionals suggest to do otherwise. Best crack on plastic welding with the use of concurrent reinforcement. This is done so.
How to solder plastic
Instruction
1
In order to get to work for starters find a reinforcement material. Suitable bronze mesh is not too thick (0.1-0.2 mm), non-rigid, but such that was capable of keeping its shape after deformation. Choose exactly bronze, because it is an excellent warming up, solder and does not rust, although it can also come in brass or copper mesh.
2
So, first of all you should wash the plastic, then run a sweep of all areas, containing various defects to the state of pure plastic, that is clear from the existing chips and cracks around the perimeter at a distance of approximately 5 mm from the edge. Now take the bronze mesh and cut it into strips the width of which will be about 7-10 mm.
3
Take the soldering iron, plug it in, and while it heats, take the plastic, put on it sliced a strip of mesh so that it overlaps the crack from all sides, and press them to each other by soldering. In the same way probajte all the seams.
4
Please note that you must start from the front side. If the plastic is thin, the reverse side is likely to show through the ground, it lightly smoothen with the help of soldering iron. If you work with thick plastic, it is possible to solder from the back side. At the seams, make holes, and do not leave the lumps, they are then easier to remove (for example, using putty).
5
The advantages of this way of working with plastic is that the parts can make the original look even on both sides. Besides, everything happens quite quickly, that is a lot of time this procedure will not take you.
6
If you decide to use resin or adhesive, pre-test to the "fatness" of the material, this drip water on the plastic. If the drop spreads, it is possible to use without processing, but if the drop retains the form, or have to grind off or to degrease (for example, alcohol, gasoline, solvent).
Not to experiment with adhesives, use a proven glue for all plastics "Plast spezial" from UHU.
Useful advice
When soldering plastics work only in areas with good ventilation as the fumes can harm your health.

Advice 5: How to glue plastic

For minor injuries ware of plastics, try to stick. In working with this material is a critical success factor will be the correct choice of the adhesive composition. Usually on the underside of the plastic manufacturer specifies its labeling. Be sure to learn the characteristics of the material, otherwise the repair will disappoint you. Bonding plastic is a real science, so do not neglect the advice of experienced professionals and carefully study the instructions for use of glue.
How to glue plastic
You will need
  • glue for plastic;
  • - acetone or cleaner for plastic;
  • - the tampon;
  • - sandpaper No. 1000;
  • - brush, spray or syringe;
  • - soldering iron or a heat gun;
  • - the valves (if necessary);
  • - clamp or press.
Instruction
1
Find out the composition of the plastic that you are going to repair. This is extremely important, because for each of this material scientists have developed a special glue. For example, polyethylene, you can just glue a special compound that changes the surface structure of this turbulent material and increases its ability to mate with another part. And for the other plastics you will need epoxy, solvents, or other compounds.
2
Note that the quality of the glue must not only provide good adhesion (adhesion) plastic surfaces, but also to resist strong mechanical impact and the sudden change in temperature and humidity. Consult with a competent seller of building material store!
3
Definitely stick to the manufacturer's instructions. Usually plastic parts prior to bonding is recommended to carefully handle fine sandpaper and clean them from dust and other contaminants. For degreasing, wipe the material with a cotton swab soaked it in acetone. Instead, you can use a special cleaner for plastic masses.
4
Tightly stow the bonding parts to one another. The quality of fit must be checked with a finger the surface finish of the sanded surface to prevent bumps and roughness.
5
Give aligned and cleaned the plastic to dry completely. Then apply glue with a small brush or sprayer. For example, experienced craftsmen, for narrow gaps, you can use a filled adhesive composition disposable syringe.
6
To reinforce large cracks and chips at the leaky plastic by using glass fiber, or reinforcement stitches pereplavleni (glued) strips of dense fabric. Thermoplastic (i.e. weight, easy to heat processing) can be pre-soften with a soldering iron or building a Hairdryer and put a layer of small metal particles.
7
Very much push the plastic part with a special holder (clamp) or press. Make sure that the product is not sold! Usually this pressure is recommended to continue for at least one hour, although the duration of the process depends on the specific material and temperature conditions. So, when heated, thermoplastics enough to withstand the product under pressure for half an hour until cool and the glue will not harden). If you are gluing plastic without heat treatment at room temperature, it must lie at least half day before use.
Useful advice
If you want to quickly and efficiently seal plastic mass from the category of thermoplastics, try to do it without glue. Try a soldering iron or welder. You can make a durable seam, itav him a reinforcement material.

Advice 6: How to restore plastic

If a plastic product has been scratched, worn and chipped, do not rush to throw the thing. Simple local repair of plastic coating you can perform with their hands. Be sure to study the composition and characteristics of material (the markings usually indicate on the reverse side) – it will depend on the method of restoration of damaged surfaces. Thermoplastics can be solder, and the thermosetting plastics – glue special glue. Otherwise cosmetic repairs are similar for all types of plastic.
How to restore plastic
You will need
  • - sandpaper No. 1000;
  • - acetone;
  • - adhesive for thermosetting plastics;
  • - soldering iron for plastic;
  • - clamp;
  • - brush, spray or syringe;
  • - abrasive paste;
  • grinding machine;
  • - cleaner for plastic;
  • - solder;
  • brass mesh;
  • primer for plastic;
  • - paint for plastic;
  • Lac.
Instruction
1
Prepare the damaged surface of the plastic to repair. It must be sanded to remove all contamination. If the fault can be glued (as a rule, the repair preferred for plastics with a content of epoxy -, phenolic-formaldehyde and other resins), be sure to clean shared areas with acetone and dry them.
2
Apply the adhesive composition directly on a seam, according to the manufacturer's instructions on the label means. To put it can spray, brush or (for narrow gaps) is a syringe. You can also strengthen the chipped plastic with glass fiber.
3
Parts match as carefully as you can! So they are not shifted and shrunk, as the press is recommended to use a clamp.
4
If you want to restore the plastic with a small scratch, try to do abrasive toothpaste. Work on the belt sander with a foam nozzle.
5
If you need to solder plastic, treat the damaged skin surface approximately 1 cm from the edge is necessary for the reliability of the seam (after the weld area will have to take the allowance).
6
Find any solder – a wire of the same composition as the plastic product. Collect the shattered pieces of plastic together and fix them with clamp.
7
Start spike plastic from the front side to eliminate the appearance of swelling. Your task – to engineer the wire in the softened plastic mass.
8
If you want to strengthen the seam, then attach the inside of the fracture of the reinforcing strip of brass mesh (the optimum thickness is 0.2 mm). It also needs to be recessed into the plastic, the heated soldering iron.
9
Complete repair of plastic coloring. This again scuff the surface (grit sandpaper No. 1000) and clean it with special cleaner for plastic. Run your palm along the seam to ensure no rough edges and ridges.
10
Take primer for plastic in a spray and a good retraite it. Then cover the detail of the ground 2-3 times, hold the bottle at a distance of 20 cm When the surface is completely dry, again easily scuff it and degrease it.
11
Spray the seam or worn crack dye for this type of plastic, matching it exactly to match the main coloring of the product. Let one layer dry for 15 minutes, after which you can repeat the procedure 2-3 more times.
12
If you managed to recover the originally lacquered plastic, then an hour later after coloring, you can ulcerate updated thing.
Useful advice
The remains of the plastic mass, which is soluble in acetone (polystyrene, plexiglass, etc.) can be filled with solvent and used to join broken plastic items. Such an improvised glue you pour into a glass jar with a lid and use only in well ventilated area. After a few days the mass will harden.
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