surface treatment

- Oct 25, 2018-


Surface treatment

After the metal and non-metal have been subjected to preliminary processing, the surface of the workpiece needs to be modified to achieve the beautification effect. If further surface treatment, the mechanical properties, physical and chemical properties, such as wear resistance, of the surface of the workpiece can be changed. , high-temperature resistance, corrosion resistance, etc.


The purpose of surface treatment:

1. Aesthetics 2. Protection 3. Special surface properties 4. Mechanical or engineering properties


Types of surface treatment:

A.

Mechanical method: bead blasting, cutting, honing, sanding, fine grinding, grinding...

B.

Metallurgy: the surface hardening (quenching, carburizing, nitriding), diffusion film method...

C.

chemical method: electrolytic polishing, pickling, chemical polishing ...

D.

surface coating: electroplating, electroless plating, hot-dip coating, vacuum deposition, cathode sputtering ...

E.

inorganic cladding: anodizing, chemical processing, coloring, enamel processing...

F.

Organic coating: painting, rubber lining, plastic lining...


The principle of blasting

[the surface treatment method of sand cutting objects]

Sandblasting (bead blasting)is a destructive processing method for the surface of the material. The surface of the material is impacted by fine abrasive sand particles so that the surface has a granulated depression to form a matte or erosive surface. In addition to gold rust, deburring, deoxidation layer, stress treatment, friction coefficient adjustment, precision adjustment, high adhesion, beautification, atomization, extinction ........... improve the surface finish of the material, its use is widely used.


Applications:
1.Aerospace and defense industry
2.Electronics industry
3.Automobile industry
4.Die-casting, forging, hardware parts, etc. Processing and manufacturing
5.Electrical appliances, furniture, household goods manufacturing
6.Chemicals, glass, plastics, rubber & food industry
7.ArtProducts, jewelry, precious metals, wood, stone processing industry
8.Medical business

Processing range:

Metals: gold, silver, copper, iron, stainless steel, aluminum, magnesium, titanium.

Non-metallic: acrylic, plastic, glass, ceramic, marble and other stone.

Other materials: wood, bamboo, plant fruits.


Application of sandblasting

1.

Surface removal processing:

metal oxide layer or black skin after heat treatment, surface pores, metal or non-metal surface rust removal, ceramic surface black spots and color removal or painting regeneration, rubber mold and gravity die casting Removal of oxides, residues or release agents of the mold.

2.

Surface beauty / enhanced processing:

decorative processing of various metal products (such as: gold, K gold jewelry, precious metal products) and matting and soft matte treatment of electroplating products, as well as non-metallic products (such as: acrylic, plastic) , glass, crystal glass) surface atomization treatment / roughening treatment and can make the surface of the workpiece into a metallic luster. Let the surface have the feeling of "biting" the surface and the irregular reflection of the surface due to the refraction of the surface. The surface hardness is enhanced to prevent scratching and abrasion.

3.

Raw edge (head) Removal processing:

surface finishing of zinc-aluminum die-casting products, plastics, bakelite products, electronic parts, magnetic cores, etc.

4.

Pre-treatment processing:

powder coating, electroplating, painting, Teflon (TEFLON), PU, rubber and plastic coating, metal spray bar, titanium plating, heat sink, and other pre-treatment to increase the adhesion of the surface.

5.

Etching processing:

surface etching, precious metal etching, gemstone, jade, crystal, agate, semi-precious stone, ya stone, antique, seal, stone, marble tombstone, bamboo, glass, ceramic, wood, etc.

6.

Workpiece stress relief processing:

parts cleaning and stress relief of aerospace industry, precision industry, or stress relief processing of national defense weapons and defrosting and rust removal.

7.

Processing of electronic parts:

removal of surface impurities after diffusion of germanium wafers. Etching and processing of silicon wafers by sandblasting into small round grains. Spraying of overflowed edges of the electronic parts packaging industry. Removal of surface printing of finished electronic parts. The ceramic electric heating material is clean.

8.

Mold processing:

plowing processing (sandblasting) on the surface of the mold, mold biting and matte treatment, increasing the adhesion of the mold coating PU, wire cutting die, glass die, tire die, bakelite mold, plating die, button die, plastic mold, shoe mold, conductive rubber mold, tire mold, and electronic product mold cleaning and matte treatment.

9.

Processing of:

large workpieces large workpieces such as oil tanks, chemical tanks, hulls, steel structures, metal houses, containers, automotive industry, etc., rust removal, paint removal, maintenance treatment.

10.

Medical science:

medical treatments such as tooth blasting whitening, dermabrasion, and keratinization


Sandblasting sand general category [abrasive material]sand

gold steel, tantalum carbide, alumina, glass beads, stainless steel beads, copper beads, aluminum beads, ceramic beads, steel beads, steel gravel, resin sand, plastic sand, walnut grains, zircon sand Wait.


Sandblasting control parameters:

body motor speed, wheel speed, wind pressure, sweep distance, grinding time, abrasive (particle size/material), nozzle design, spray angle, etc.


Sandblasting method

Dry blasting

dry blasting is a method in which the abrasive material is accelerated by a vacuum tube using compressed air as a power to accelerate the spraying or by using a hoist to lift the sand material onto the workpiece by a high-speed turntable by centrifugal force, thereby performing surface treatment on the workpiece. . Ideal for surface processing of work that is not suitable for water.


Air-jet blasting is

similar to painting spray guns. High-pressure air is used to connect a sand supply pipe before the air outlet, and the sand material is taken out by high-pressure air.


Centrifugal blasting

uses high-speed rotation to generate centrifugal force to smash the sand to the workpiece to achieve the effect of sandblasting, and the uniformity is good.


Features:

1. Because it is dry, it does not need to be sanded for drying, and it does not care about rust.

2. It can remove the burrs (surface protrusions) and remove and wash the surface deposits without damaging the workpiece.

3. The surface of the pear floor (speckle pattern) is processed, especially in the processing of the surface roughness.

4. Maintenance is easy because no waste liquid is required.

5. The machined surface is not rough compared to the spray washer.


Wet blasting The

so-called wet blasting is a method in which a mixture of an abrasive material and water is pumped and a surface is processed by a high-pressure air blasting work.


Features:

1. Due to the use of water, there will be no environmental pollution problems such as micro-powder flying.

2. Removes and washes the burrs (surface projections) and surface deposits without damaging the workpiece.

3. Uniform plow surface (speckle pattern) processing, especially in the processing of surface roughness requirements.

4. Only a small spray effect on the machined surface can improve and strengthen the material.

5. The removed foreign matter is washed and discharged with the sprayed water.



Examples of sandblasting entities:

1.

Fine leather goods, jewelry, and watch industry:

metal surface pre-treatment, leather surface matting, soft light, matte finish, texture.

2.

Advanced glasses:

metal frame stress relief anti-deformation, pre-plating treatment, colloidal frame, friction coefficient, adjustment to prevent slipping, increase aesthetics.

3.

High-grade lighting:

anti-foot oxidation, glass soft light, atomization, engraving.

4.

Advanced kitchen utensils:

stainless steel treatment, pre-bake treatment, increased service life, corrosion resistance, the European and American furnace method, pre-treatment, anti-rust and anti-oxidation, metal stress treatment, and thermal deformation resistance.

5.

Advanced sports equipment components:

eliminate the stress of the frame of the parts, prevent deformation, pre-treatment of the paint, and increase the service life.

6.

High-grade denim pants: The cloth is sprayed white to form a natural style.

7.

Advanced home appliances:

electronic parts packaging operations, sol burr processing, atomization of the host casing surface, sandblasting.

8.

Advanced car components:

Increase wear resistance and corrosion resistance of metal through sandblasting.

9.

Glass products: The crystal clear glass world comes from the blasting of the world.

10.

Jewelry: Jewelry that you can't put down, comes from the natural washing chain of sandblasting.

11.

Art Boutique:

Unique sandblasting technology ~ create a perfect product.

12.

Ceramic Products:

The battle between pottery and magnets since the ages - in the world of sandblasting - has become a favorite in people's minds.

13.

Stainless steel, glass engraving:

taste texture, through the baptism of sandblasting benefits.

14.

High-end furniture: a

comfortable home life - crafted from sandblasting.

15.

Sanitary equipment:

metal part pre-plating treatment, increase corrosion resistance, increase the aesthetic quality, tile-part, increase anti-skid, anti-explosion, mirror atomization, glass pattern engraving.

16.

Steel beam column:

Casting sand on the working surface of steel, peeling off the scale or oxide film. The anti-corrosion coating project is also an important part of the steel structure, which is treated before the hot-dip galvanizing and paint anti-corrosion treatment.