Painting machines after repair. Nitrocellulose paints and varnish materials for machine tools, machinery and other metal products

Enamel of NTS-25 is a SS suspension in a solution of colloxylin BHB and a rosin ester with the addition of plasticizers. Enamel produced 19 colors. It is applied by a strokewater in 2-3 layers according to the primed metal surface.

Dilute to a working viscosity 25-38 C by PT-4 solvent 64B or 646. The main purpose of enamel is the painting of equipment and various metallic and wooden productsoperated by Viotrn premises.

Enamel NTS-132 - Nitroalkid. Two brands are produced - brush NC-132K and spraying NTS-132P. Each brand is produced 24 colors. The composition of non-volatile parts includes colloxylin, alkyd resin No. 188, plasticizers, pigments.

To improve bottling, silicone fluids are introduced (type PMS-200A, AF-2K, etc.). The bat of the enamels applied to the brush consists of 30% (mass.) High-boiling active solvents, 25-30% of butyl alcohol and 45-50% xylene. The bat part of the enamels applied by a sprayer contains 12.5-16% (mass.) High-boiling active solvents, 8-12% of low-boiling active solvents, 35% of ethyl, butyl or isobutyl alcohols and 40-41% toluene.

Pigments are administered in nyutroposnbv by dissolving SBP or in the form of pigment pastes obtained by dispersing the IA beaded or ball mill or on the paint-car machine.

Before use of enamels, it is diluted: NTS-132K - solvent 649 to a working viscosity 30-60 s by PT-4, and the NC-132P is a solvent 646 to a working viscosity 18-20 s. Enamels are applied in two layers.

They form glossy, wear-resistant and weather-resistant coatings. Enamels are used for painting metal pre-primed by alkyd primers and wooden products that do not require decorative finish.

Enamel NTS-256 - intended for painting of metal cutting machines. A suspension of SCP in a solution of colloxylin input, alkyd resin and plasticizers. Enamel produce 11 colors. Before use, it is diluted to a working viscosity of 22-25 c according to PT-4 solvent 646 or 647 in an amount of 90-110% of the mass of enamel.

The enamel is applied by the strokewater on the primer layer of GF-021 or GF-0163 or the water-fastened primer of PF-OZZP in three layers. The first and second layer is dried for 10-15 minutes, the third layer is within 2 hours.

Enamel forms a glossy coating with good physicomechanical properties, withstanding the effects of alkaline cooling fluids (triethieolamia, alkaline emulsion, etc.) and gasoline.

Emale NTS-262 is a suspension of carbon black in a solution of colloxylin, an alkyd resin and plasticizers. Enamel is obtained by dissolving the SVP of carbon black in nitrosnov.

Up to the working viscosity 25-30 C by PT-4, the enamel is diluted with solvent 646 and is applied by the sketch of alkyd primer into three layers with an intermediate drying for 10-20 minutes and the final dryer at 18-22 "C for 1 hour. Enamel after drying Forms a glossy coating with a thickness of 45-60 μm. The coating can be grinding and polished with waterproof skins and polishing pastes. Enamel is used for coloring of sewing machine heads.

Puttone Nz-0043 is a paste-like mass consisting of a mixture of pigments, fillers and thixotropic substances with nitro. The approximate composition of the putty [in% (mass)] is as follows: The zinc-tempered 13.5-14, talc 27-28, chalk - 15-15.5, thixotropic additive - 1.5, nitroshanov - 41-43. The putty is obtained by dispersing pigments and fillers of the Bisshing Mill of Heavy Type or in a ball mill. The main purpose is to align the cast iron surfaces of the machines.

Puttailing with metal or rubber spatulas is possible both solid all over the entire surface of the machine and local. Putty apply a layer with a thickness of up to 1 mm; After drying for 4 hours at 18-220C or for 1 hour at 60-700C, the layer of putty is subjected to dry or wet grinding.

After the machine is renovated and the question arises, than and how to paint it. Several demands are made to the color of the machine:

1. Protection of the surface of the machine from corrosion (humidity, temperature differences)
2. Mechanical exposure resistance (scratches, abrasion, chips, cracks)
3. Chemical exposure resistance (oil drying, coolant)
4. Preservation external view Paint and varnish coating during the entire period of operation

Stages of work on coloring

For the painting of the metal surface, it is desirable to apply a three-layer system, and better four-layer coating:

1. Adhesive primer layer - Must be tumbling and elastic, contain a soft resin with high adhesion;
2. Shpaklevka - without applying putty, it is impossible to obtain a flawless, smooth and brilliant surface of the color of the metal;
3. Primer layer - the primer layer should communicate color color and therefore contain a sufficient number of well-figmeters;
4. Coating, paint - The coating layer provides the entire coating of an impeccable surface.

If necessary, you have to apply more than four layers of coatings, i.e., some of the four layers have to be applied several times. A stitching, except for normal putty, is used to be used to be straightened, which is applied to separate areas of the stained product with strong surface defects.

All work on staining the surface of the machines is reduced to the following sequence:

• Preparation of the surface of the machine - cleaning from dirt, rust, old paint. applying primer and putty, surface alignment;
• Painting - applying paints on the prepared surface;
• Drying of the painted surface.

1. Preparation of the surface of the machine to paint

Cleaning the surface from dirt, rust, old paint

Cleaning the metal surface is necessary to improve the adhesion of the paintwork and corrosion properties of the painted surface.

The surface should be cleaned from old paint, which, if not to remove, it may not give fresh paint to the surface as efficiently as possible.

To remove dirt, rust, old paint from the surface of the machines there are several ways:

• Mechanical - cleaning with shabra, wire brushes, skins or with a sandblasting machine;
• Chemical - removal of old paint washing with White spirit, turpentine, acetone, etc. or 5-10% alkali eating solution at a temperature of 80-90 ° C, followed by washing water;
• Thermal - Removal of paint with a soldering lamp flame and other means.

The best way to clean the surface of the corrosion machine is sandblasting or shot blasting. Cleaning is much facilitated, also by applying the power tools.

Primer, putty and alignment of the surface of the machine

After cleaning the surface of the machine, it is necessary to degrease both primer. The soil layer protects the surface from corrosion and, most importantly, must contain a resin with high adhesion - dying and elastic. The primer is produced by a brush manually, with a sprayer or dipping, if the details are small.

A 2-component epoxy primer with a high content of anti-corrosion additives has proven itself well - SG64. Thickotropic properties provide low viscosity during spraying and fast "setting" with a surface, without spreading, and high adhesion to the metal and shelterness allow you to create a uniform solid coating. This soil effectively protects the working surfaces of corrosion machines, as well as from chemical exposure and excessive humidity. In a pair with SG64, you can use homogeneous or structural enamel based on acrylic and polyurethane from the PD series.

The primed surface is again degreased and put off in order to align it and improve the appearance of the coating. The thickness of the spacing layer should not exceed 2 mm. Spaklyka is applied to the surface with rubber, metal or wooden spatulas.

One of the new products in this area is automotive swamp with fiberglass hardening, Especially convenient for filling large dents.

After drying the putty, it is thoroughly grinding, polished until the smoothing of all irregularities with the help of the skin number 80-100, and the final - pimpe or waterproof skurt. Grinding is much facilitated by the active use of power tools.

Before the color must be degreasing (antisilicone or degreaser), dust, oil, fat are removed.

2. Staining machine

Painting machines can be made both disassembled and assembled. If you need to squeeze individual nodes, then they are usually removed from the machine, and then, after painting, are set back.

Usually, for better color, you need to dry and paint every part, which is in the machine device, since the subsequent normal operation of the machine in operation depends on each part.

Surfaces are painted only clean and smooth. You can paint with spraying or brush. Usually, paint before applying on the product is filtered through a metal sieve with 1600-2400 holes per 1 cm2. The repeated layer of paint can be applied only after the previous layer of drying, giving the machine a beautiful appearance.

The active domestic normals for the color of metalworking machines are provided basically only two colors - gray and green. Other colors available in Normals are designed for coloring of signal-warning equipment and other artistic design departments of equipment Developed proposals for expanding the range of colors for the color of the outer surfaces of metalworking machines.

Selecting paint

To solve a comprehensive protection and improvement of the appearance of the surface of the machine tools, special paints have been developed, for example:

• Polymeron - Uretteo Metal Special Metal + Phosphogrun - quick-drying phosphating ground for metal;
• PD-39. - Structural polyurethane single-layer paint based on acrylic;
• PD-48. - Structural polyurethane paint based on acrylic polyurethane.

Not bad alternative to special paints - car acrylic enamel and two-component epoxy soil. Automobile paints were originally created for unfavorable conditions.

To obtain a high-quality surface, it is better to use an airless (electric) sprayer or with a compressor. A manual way of coloring is also possible, however, most often, the quality drops and more time is spent.

It is convenient to use aerosol paints. They are easily applied, provide high color performance, and also allow painting different colors And do not require the use of additional painting equipment.

In automotive stores, you can also choose many auxiliary Materials, Protective tapes, means for removing flows, special protective clothing.

3. Drying

Drying is made at more high temperatures air than at the time of staining, preferably in the drying chamber, then the paint will be held on the metal structures the best way. But you can use infrared heaters.

4. GOST 22133-86

For painting equipment in industrial environments, it is necessary to adhere to the requirements GOST 22133-86 Coatings of paintwork metal-cutting, blacksmith-presses, foundry and woodworking equipment. General requirements and GOST 9.032. Paint coatings. Groups, technical requirements and notation.

The standard applies to painting a metal-cutting, forging, presses, foundry and woodworking equipment, including robotic technological complexes, establishes general requirements, color, texture and classes of paintwork

The following gamma colors are recommended: green, light green, gray, blue, gray-blue, cream dark, cream light. The above colors can not serve as a standard or standard color. Each type of machine requires an individual creative approach. On the pages of the magazine "Technical Aesthetics" a lot of attention is paid to the aesthetic culture of production, especially in the scientific approach to the color of the equipment and premises of the workshops.

List of applied enamels for painting machines according to GOST 22133-86

Today the machines are used widely when performing many operations. When painting machines are required, instruct such work follows only by qualified specialists who will respond to fulfillment. NTV-Energo Antikor offers painting services different species Machines on favorable terms.

Professional painting

In the case of such equipment, both machines have a task of ensuring the effective protection of metal surfaces from the appearance of corrosion. It is possible to achieve this together with competently selected paint types and compliance with staining technology.

By ordering equipment painting services in a specialized company, customers receive a qualitatively performed job. This ensures excellent anti-corrosion protection, which contributes to a significant increase in the service life of the machine itself. Thus, all the material costs required to order the service becomes a cost-effective investment due to the achievement of equipment durability.

Benefits

NTV-Energo Antikor offers favorable conditions for ordering services. These include:

• Availability of rates that contribute to low costs to customers.
• Attracting the work of qualified specialists, the use of all the required modern equipment and tools allows you to quickly cope with the tasks.
• Experienced employees are perfectly coping with painting different types of machines, providing in a short time to customers a quality result.

It is no less important that under the performance of work, modern and high-quality materials are used, which are competently selected by employees in each case. When ordering services, customers can get professional expert advice on all issues.

After the machine was all disassembled, the time was suitable. After examining the surface of its details, it became clear that the existing paint coating should be deleted. You can of course paint and so, but, most likely, the old paint will be scattered, and did not want to do the double work. I tried to remove the paint using the sandblasting machine that connects to the Herkera, but it's all nonsense. Do not beat off this Bourgeois Pribrud paint from the USSR. Eventually went for special tool For washing the old paint. I took our, we will support our manufacturers, and in one and test this tool.

I tell you, the thing is crooked. Paint in one layer raises almost immediately after applying (specifically in this case). About unprotected skin in general, it is silent, she quietly burns hands even through rubber gloves, so it is necessary to work strictly in glasses and good rubber gloves. Some details of the machine were painted in three layers, so it was not possible to minimize the paint, and where there was a coating in one layer, as already said, there were no problems at all. To simplify paint removal work, used washing high pressureIn a pair with a washes, they work greatly. We do it like this: we apply a means to the paint you want to remove, and leave it all for thirty minutes. Thirty minutes later, we arrive and the sink of high pressure knocked off the covered coating. If there are places that were not succumbed, then we repeat the procedure. In my case, absolutely completely all moved from the third time. Details washed. Because of the water on the surface of cast iron jacket, a light rust rust appeared. It was easily removed using a solvent.

Painting. The massive elements of the machine decided to paint into bright green, and some small details and control handle painted in black.

I replaced the whole fastener. When assembling, I will use hardware from stainless steel. There are thoughts to a little modernize the front grandmother, but a little later. If it does not work, I will collect in staff.

Changes in the design of the backstone still do not plan. The only thing that will have to replace this pin pinth pin and pin pilot guide, it is also installed screw. Pinch pin pin should be changed due to tortured thread, it has already become unusable.

About the collection and finalization of each of the nodes will tell in the following articles.

Articles on the restoration of the machine.