How to repair plastic bumper with your own hands. Repair of cracks of plastic bumpers with their own hands

Move from thermoplastic plastics (thermoplastics). When heated, they melt, and when cooled, returned to its original state. In this principle, the technology of restoration of such plastic is built - welding. It allows you to hardly close, for example, cracks and end-to-end breaks on the bumpers and even restore their brackets. With this way, all sorts of moldings, expansion and lining, as well as pumping elements, including housings and headlight brackets, are repaired.

Conducting an analogy with welding metal, in such a repair of plastics instead of electrodes or wires, plastic rods are used. They have a different profile, color, but the most important thing is the composition. It is selected on the labeling on the repaired element. For the production of mounted automotive plastic Use only a few types of thermoplastics. In 90% of cases, it is polypropylene (PP), and the residue is for example, ABS plastic.

Welding plastic goes when high temperaturesoh. For polypropylene it is 400-430 ° C, and, for example, for ABS-plastic - 500 ° C. To such a temperature, the repair area and the rod warms up a special hairdryer. Since plastic of one composition is involved in the process, then the initial structure of the thermoplastic is fully restored. The resulting compound is not inferior to the initial monolithic zone. This effect can be compared with laying from plasticine from one set. Unlike metal welds, the plastic repairs are completely sandwiched during the preparation of the surface to paint.

With the help of welding, they treat, in principle, any damage and even recreate broken elements. As usual, the technological freedom of action limits economic expediency Works in each case. For example, to close one, albeit a large gap on the bumper (taking into account his removal, installation and subsequent local painting) usually costs twice cheaper than buying a new body element and completely paint it. But the treatment of more numerous damage can be inappropriate. One example: a crack and damage to the fasteners of the lining of the mirror of the budget car. Work on full recovery and staining will cost more than the cost of a new element that immediately goes into color.

Consider two examples of restoration work on plastic:

1. Repair of numerous end-to-end breaks in the rear bumper.

Restore such a bumper is economically impractical. But you can visually show the possibilities of plastic welding. For a start, the master with the help of a construction dryer in several stages is straightened by numerous dents and with the help of metal scotch bonds breaks.

Preparation for welding starts from the inside of the bumper. At the junction of the breaks, the groove is pulled and later processed its edges. As it often happens preparatory work Take the most time.

Plastic of this bumper has a "PP" labeling (polypropylene). The master chooses from a set with the composition of the rod with the most suitable profile.

The front of the bumper is pre-sand and repeated the welding process similarly to the inside.

After welding external seams, the surface is styled and produced the finish alignment of the dentin, so that the layer of putty when the local painting was minimal.

2. Repair of the bumper bracket

Using the example of the same long-suffering bumper, we consider more favorable repairs. Often, due to the broken mounting bracket, the entire bumper sentences to the replacement. Basically, only his ears suffer, but welding will come to the aid if the entire plank fell off with them. Such repairs costs without local color, so saves decent money.

Works begin with the top side of the bracket. The master processes the edges at the repair point and sticks on the back side of the tape, which plays the role of temporary base, and welds the plastic rod.

After laying the rod, it is additionally bred and crimped with special tongs. Next, by analogy, welding from the inside of the bracket.

The bumper of the car usually suffers from borders when parking, stones on the road. And no one is insured against the roads in the form of a small accident. In car services for restoring this item, considerable amounts are asked. The ideal way out of this situation will be the repair of the bumper from plastic with their own hands. Tell how to repair the bumper with your own hands without tremendous and temporary costs.

Types of plastic bumpers

Plastic bumpers on modern cars are made of two main types of plastic - thermoactive and thermosetting. It is necessary to know the differences in these types of materials to select the correct method of repairing the bus. To find out which plastic has made automper, you need to look at its opposite direction.

Thermoactive plastic bumper

Thermoactive plastics It can be subjected to recycling, since when exposed to high temperatures, they soften and become plastic. Easily can be welded. These include:

various polyethylene ( PET,PET, PVD, PND) -used in the production of pipes, tanks of cars, bottles, children's toys, food containers and packages, packages, rugs;
polystyrene (PS) It is used in the manufacture of containers for dairy products, audio and video cassettes, various dishes;
polyvinyl chloride ( PVC,PVC) Used in the production of windows, outdoor coatings, bottles, films for packaging, cable isolation, credit cards and medical devices;
polypropylene ( PpPP) It is used in the production of food containers, batteries, bottles for bottles, automotive parts.

Thermoreactive plastic bumper

This type of plastics is used in production much less often, because they are not recycled.

When exposed to high temperatures termoreactive plastics Not melted and destroyed. Very poorly welded. But very durable and resistant to damage.

These are the following types of plastics:

polyurethane (PU, PU) used in coatings, finishes, gears, membranes, pillows, mattresses and automotive seats;
epoxy resin. Used in adhesive compositions, sports inventory, electrical equipment, automotive equipment;
phenolic resins used in furnaces, handles for cutlery, automotive parts, printed circuit boards;
fiberglass (ABS / MAT) -used in automotive bumpers and other reinforced details.

The body of modern sports cars make precisely such plastic -fiberglass and carbon fiber.

Types of damage to car bumper

The front bumper and rear are subject to various damage. Depending on the degree of damage, you should choose one or another method of restoring the automotive bumper. Damage There are the following types:

Cracks.
Scratch.
Dents.

Restoration scratches auto bumper

We repair the bumper with your own hands - we remove scratches from the case. To eliminate scratches on the bumper, make grinding. Take the sandpaper and carefully work out all the irregularities to the smooth, smooth state of the surface. Then apply putty on the surface and, after drying, primer. Now you can start painting.

You can also do with special liquid polymer, in line with the corresponding markings on the bumper. Apply the polymer layer according to the instructions on the package, then process the sandpaper to the perfectly smooth surface.

Repair of dents on the bumper of the car

To save a car bumper From dentsuse a construction hairdryer or gas burner.. Heat the deformed area, softening it, and give the correct geometric shape. This method is suitable for thermoactive plastics - polyvinyl chloride or polypropylene.

With significant deformations of the geometry, it is not recommended to strain the bumper independently - better contact the car service to specialists.

Caution: Do not overheat the processed area, it can cause even greater deformation.

Repair of cracks on the bumper of the car

Repair bumpers It is impossible without knowledge about the repair of cracks. Cracks on automperia can be eliminated by a variety of ways. To choose suitable optionBe sure to look at the label on the back of your detail. Depending on the type of material, the repair of the bumper from the plastic you can spend:

welded with thermofen or electrodes;
with the help of fiberglass and liquid polymer.

Required tools and materials for the repair of the bumper

For different ways Repair of plastic bumpers can be useful the following materials:

Soldering or construction hairdryer, or soldering Station With a hairdryer, you can gas burner.
Soldering iron industrial or household.
Solder for plastic (by the type of bumper plastic).
Fiberglass fabric.
Metal grid.
Set of liquid polymers.
Epoxy or polymer two-component glue.
Emery paper of various grainies.
Primer.
Putty.
Rag or rag.
Roller for painting works.
Tassel for glue.

Bumper Auto Repair Order

With the help of various techniques at home, you can restore the automper different species plastic. Consider the most common methods how to repair the bumper with your own hands.

Repair with fiberglass and liquid polymer

The best way for fiberglass or polyurethane bumper repair - Restoration with a patchwork from fiberglass. It will take a piece of fiberglass fabric, liquid polymer composition or epoxy glue (two-component). Procedure Such:

Preparatory work: Remove paint and carefully sand and degrease the surface.
After stripping, cut the piece of fiberglass in the size of a damaged area.
Mix two components of glue and mix.
Apply glue to the surface and glue fiberglass.
Apply glue into a few layers with flushing movements, while fiberglass does not bother.
Cut through the obtained layer of fiberglass roller, moving in different directions. It is necessary for the layer seal.
After drying, it is thoroughly sanding the surface of the sandpaper, moving in a circle.
Then apply a flat layer putty to align the bumper.
When everything dies, apply a primer in 2-3 layers and dry. Treat emery paper.
Now you can proceed to staining.

Bumper welding with thermofen and solder

Only thermoactive types of plastics can be welded, and if your item is of thermosetting plastic, select another repair method.

Before repairing the bumper with your own hands by welding or soldering, spend it thoroughly clean and carefully dry. Now it is necessary to choose a plastic solder, suitable for the material of the bumper of your car. On the reverse side there is a plastic type marking - select Plastic Rods with the same notation.

Order of work Will be:

Clean the place damage to sandpaper or grinding.
Powerful soldering iron (with a capacity of 100 watts) drop the uniform groove throughout the length of the crack. You need to do it very evenly, try not to overheat plastic so as not to mad and damage it.
Take the welding rod From plastic and attach to the resulting deepening from the front side of the part. Heat high temperature hairdryer for better connection. It is recommended to heat the solder at the same time, and the groove itself all over the crack. Must get reliable, strong seam.
When the outer seam hardens, do the same actions With the inside of the bumper.
So that the weld seams turns out to be stronger, make it above it several transverse "bridges". To do this, welcome across the seam alternately small segments of the solder size of 3-4 centimeters. Do not forget to impose such bridges to the ends of the crack so that it does not crawl on.

Today I will tell you how to repair a cracked plastic automotive bumper with epoxy glue. This procedure is not quite complicated, but will allow you to save a solid amount instead of changing the bumper to a new one. All actions are available to an ordinary car owner and will not require special knowledge or expensive equipment.

Repair of a cracked bumper with your own hands

First of all, you need to remove the bumper, since the method of repairing the repair is not possible on the car. The photo shows how the damaged area looks like outside and inside.

So that the glue reliably clutches with the plastic surface, it must be prepared. For this sharp knife I expanded the edges of the crack to get a V-shaped ganker. You also need to clean the place of damage from dirt and additionally sandwith the shallow sandpaper.

For fixing two parts of the bumper, I used paper tape - it normally holds, but it is easier to remove it. When connecting the bumper and sticking the scotch, it is necessary to ensure that the edges of the cracks converge at one level, and there was no adhesion to each other.

The process of applying epoxy glue I divided into two stages:

Note! Epoxy glue consists of two components, which, after squeezing from the syringe, should be mixed to a homogeneous state.
After curing the resin (about 12 hours), you can remove the locking tape from the front side of the bumper and get into the sealing of the cracks from this side.

To fill the crack, I used a special putty for bumpers, which was applied with a rubber spatula, and after drying it was gripped with shallow emery paper.

The final stage of repair of the bumper is its painting. Before that, you need to carefully clean it from pollution: I washed with plenty of water and detergent.

Before staining plastic, it is necessary to apply a layer of special primer - otherwise the paint will quickly exfoliate. When the soil layer is dry, I completely painted the bumper paint from the canister so that it was one shade. After applying two layers of paint, I got a completely acceptable result - the crack tracks is practically not visible.

After drying, the paint remains to put the bumper in place, and the repair is over. As a result, we get inexpensive repair with your own hands and almost complete absence of traces of damage.

The main function of the bumper is the protection of the body from possible damage that may occur during operation. vehicle. In most cases, it is he suffers from mechanical damage, attacks of small pebbles from the road surface and as a result of an accident.

The winter period is considered the most dangerous, since there is a high risk of emergency on the road, which can cause damage to the bumper or splitting. You can purchase a new part, but such a purchase is quite expensive.

Much cheaper will renovate bumper with their own hands. It does not take much time and strength, and there will be no trace from the defect on the renovated part. Another reason for which this part of the body may need urgent repairs - its natural aging, which is inevitable even with the careful operation of the car.

To paint the bumper, it is necessary to thoroughly prepare, paint application technology in this case does not have almost no differences with the technology of paint and varnish coating on the body of the car.

Painting bumper is two types:

Full (you need to disassemble the bumper, also the number of materials used for work will be much more than with local repairs).
Local painting (in this case you do not need to dismantle the bumper to perform work).

Types of Bumper Defects

Scratched bumper, what to do? Such a question is often asked for novices and even experienced drivers, when they detect chips or other damage on this part of the body. You can give a car to a hundred, and you can try to repair yourself.

To begin with, it must be carefully flushed and dried. This will help assess the entire scale of damage and choose how to eliminate them. Types of Bumper Defects:

Scratches in the form of a grid. Such defects eliminate the easiest way with the help of ordinary polishing. Then the damage is processed by a special spray that improves the adhesion and is repeatedly painted.
Celebrations and a variety of chips. In this case, you can also repair the bumper with your own hands, for this it is necessary to eliminate all dents using a special tool and putty.
Split bumper. In this case, the repair is very difficult in this case, to fulfill work it is necessary to collect all the pieces of the bumper.

How to repair bumper

To properly perform all the work, you will need to acquire special materials and tools. In the process, you may need a soldering iron, a construction hairdryer, a machine for polishing surfaces and circles to it (you can use the conventional electric door with nozzles), sandpaper of different grainability, as well as consumables (special putty, primer, degreaser and paints and varnish materials).

Before you start repair work Damaged bumper is better dismantled. It will be much more convenient to work in this case and you can avoid tensioning materials in the place of defect. The detail must be carefully cleansed from the accumulated dust and dirt, wash it in warm water using a special car shampoo.

After drying, the broken pieces need to be glued and combined with scotch. After that, you need to arm a soldering iron and carry out all the work on the restoration of the integrity of the bumper. To return to the bumper of his original shape, all fragments are soldered from its inner side.

Since it is hidden from strangers, you can not worry about the aesthetic side when performing work. You need to solder pieces very carefully, so that the entire length of the seam turned out uniform. In order for the repair for a long time, in the seam you need to additionally hit the brackets from the furniture stapler.

It is necessary to choose them so that they do not pierce the bumper through and perfectly fit in length. It is better to use tweezers in the process of performing work to protect yourself from possible burns.

Place the staples need perpendicular to the seam at a short distance from each other. All cracks in the bumper, who have just begun to appear, also need to be sealed, so that in the process of operating the car from vibration they are not turned into split. It is necessary to protect the brackets from corrosion, covering them with a preheated plastic.

After the end of all works, the bumper must gain its original shape. Repair of bumpers do with their own hands does not require any special skills, the main thing to adhere to the work technology.

How to repair bumper with your own hands

After performing all the work on the restoration of the intake of the bumper, it is necessary to thoroughly stick the obtained seam. You can use for this special grinding machine With circles of different abrasiveness or perform all work using sandpaper.

Need to remove Old paint and varnish, remove the soil and level the surface. After soldering, it is also necessary to panicly soldered carefully, alleached all the irregularities. You do not need to try to get the surface without a single flaw, because there is a possibility of thinning the bumper and only additionally to deform it.

After completion of the work, you need to remove the dust accumulated on the surface, blowing the bumper compressed air Or treating a special napkin.

Painting bumper with your own hands

In the next step, it is necessary to align all defects with a special putty. It is necessary to heat the mixture, only dents and pits, a layer of putty, which is applied to a flat surface is better to delete.

Each layer must be given enough time to dry (in accordance with the instruction) and only after that apply the following layer. After the putty completely curses, you can start it with its alignment using a grinding machine.

Works can be performed and emery paper, but it will require more time and strength. Also skit carefully handle the inaccessible places of the bumper. After that, the bumper is grounded with a special two-component acrylic soil.

It is necessary to impose it with a thin uniform layer to avoid the omit. Be sure to carefully process the problem areas and give the previous layer to dry. You need to dry the primer at least a day, you can speed up the process using a special infrared heater.

The grinding procedure begins only after the drying process is completed and is carried out similarly to the previous steps. Before the start of the procedure, it is necessary to use the developing powder to identify possible flaws that remained after the previous stage of repair.

How to paint the bumper yourself? After decoration, the surface of the bumper is cleaned from dust and degreases. After that, you can proceed to applying paint.

How to paint bumper with your own hands?

The procedure for selecting paint color needs to be given a lot of attention so that later the repaired bumper does not differ in shades from the rest of the paint coating of the body. Therefore, it is better to refer to the specialists of a hundred who spend a tinting on special equipment.

Such a procedure is quite expensive, but it guarantees 100% accurate selection The required shade of paint. Before starting work, it is better to try to spray paint on an old unnecessary body part to check its quality and shade.

Before starting staining, it is necessary to carefully degrease the surface to ensure the best adhesion of the paintwork and the base. However, it is necessary to do it very carefully because a large number of Antysilicone can provoke soil turning, and all preparatory work will need to be renovated.

The paint is applied in several layers until the desired shade appears, and after complete drying, the bumper is polished. If you need to paint only local damage, then the grout and all preparatory work should be carried out only at the place of damage.

Then the lacquer is processed all the part so that the repair point does not stand out. If the work was used by poor varnish or it was incorrect, various kinds of defects can manifest themselves, which sometimes it is quite difficult to eliminate.

Apply paintwork is better in a specially equipped room with a compressor and collapse. The paint is applied very carefully so that the bumper does not form approach and other defects. In front of the fill in the paint in the spray, it is necessary to thoroughly strain using a special filter or using a conventional kapron stocking. Prashopult should be located at a distance of at least 20-25 cm from the surface of the bumper.

If the local repair of the bumper is performed, it is not necessary to dismantle it, all preparatory work can be carried out without violating the integrity of the factory assembly. Before coloring, it is necessary to protect all the details from the ingress of paints with the help of a roll of polyethylene and painting tape.

Then an acrylic varnish is applied to the dried paint in several layers. When working, it is necessary to follow the instructions for it and do not neglect the means of individual protection when working with toxic paint materials.

To paint the bumper with your own hands, in most cases, it is much cheaper than to turn to professionals, but there is a possibility of the emergence of various defects due to non-compliance with technology or the absence of necessary practical skills.

The bumper of modern cars is made mainly from the plastic, they are damaged at a small accident and no obstacle.

Different car services are engaged in the repair of body parts, some of them specialize in this form of restoration work. In order to save, some owners of cars perform the repair of bumper from plastic with their own hands. What are the features of the independent restoration of these body elements, will be considered in the article.

As you know, the bumper happens the front and rear, and the front bumper (PB) is damaged much more often than the rear (ZB). PB needs to be repaired if:

damaged paintwork;
scratches appeared on the plastic element;
due to the hindrance to the obstacle or with a small accident in the bumper, cracks were formed.

If a blow to the front or back of the car, a strong, bumper was most likely not to restore. But in specialized car services, it is often taken for the repair of a strongly broken bumper from plastic. The whole question is whether it is worth the recovery of money, in some cases it is easier and cheaper to buy a new detail.

The price of PB or ZB repair can be different, it depends on the level of car service, the degree of damage to the part, the difficulty of recovery. For example, in Moscow, the restoration of the bumper can cost from 2500 rubles, and the painting of one element will cost 5,000 rubles. There are autotech centers that promise to repair the bumper from 500 rubles, perform repairs for one or two hours. It is not worth a job on advertising, most likely, car owners are deceived, or the repair performed here is poorly.

Restoration of plastic bumper

The repair of the front or rear bumper is of varying complexity, there are basic types of work, which are conducted with body elements:

sealing cracks;
restoration of plastic fragments;
repairing dents;
preparing for painting (stripping, sliced);
primer;
painting;
restoration, repair fasteners.

Restoration of the plastic bumper requires care and accuracy, sufficient experience, and only a qualified master will be able to perform a qualitatively.

PB repair becomes profitable if the bumper itself is rare, installed on an expensive car, on which the cheap "non-original" car owner does not want to put. There are still tuning bumpers - they cost expensive, and non-original parts of this plan industry is not produced.

If the car is budget, and the owner of the car "with hands" can be tried to repair the PB alone. Much depends on the degree of damage, it is possible to restore the body item, with your own very bit. The repair of the front bumper (with a crack) is performed with the removal of the body part from the car, and for the sealing cracks you need to connect the edges of the damaged area - to make a reliable lock.

There are special sets for repair, for example, from the company 3M. The composition of the FPRM set includes:

two components of epoxy material (glue);
reinforcing mesh;
special scotch.

Prepare the bumper to gluing as follows:

damaged plots to be repaired, rinse thoroughly by soap water, we give the time the plastic is thoroughly dry;
grind the repaired area, remove the paint coating from it. Clean the paint so that the site released from it can be pasted tape;
at an angle of 45 degrees, stepping the edges of the crack, they must be in the form of wedges. We process the surface first from the inside, and then outside, for this we use grinders with a credit disk;
we clean the treated surface with 3M 08985, we are waiting for the full evaporation of the degreaser;
we glue the tape from the outside of the glued part;
from the inside, fix the reinforcing grid;
we mix epoxy components in a ratio of one to one;
on the reinforcing grid, we apply the prepared composition, a spatula, to we press it inside, it should take a crack;
we warm up the crack with infrared drying (6-8 minutes). If there is no special device for drying, let dry glue at room temperature about 30 minutes;
we remove the tape, degrease, process the front part of the adhesion activator;
prepare the composition for the front side;
apply the glue outside the crack;

again we give the details to dry;
the dried surface is processed abrasive circles, first with a coarse abrasive (180), then shallow "sandpaper" (240, at the end of treatment - 400);
we blow the repaired portion with compressed air, we clean the composition from the kit 3m 08985, wipe the dry wind. Now the bumper is ready for painting.

Damage to the bumper can be different - in one case it is just a crack, in the other when the plastic slices fly away. To make a sealing of a plastic element, you will need:

construction hairdryer;
angle grinder;
pliers;
screwdriver;
soldering iron;
sandpaper;
spatulas.

The soldering iron must be quite powerful, preferably at least 100 watts.

If the bumper pieces broke and lost, initially refund damaged areas, give them rectangular or triangular shapes.

Work in the following order:

If you need to roll to the bumper pieces of missing plastics, it is desirable to take plastic of the same type, the marking is usually indicated on the inside of plastic parts.

To solder missing pieces in the bumper, we do as follows:

If you cannot cut the desired piece exactly in size, you can cut the plastic with a reserve and solder it from the inside of the bumper. But this option is worse, since the patch around the patchwork is formed when the front of the front is a facial part.