Surface treatment is the oldest technology. Since there are human beings on the earth, surface treatment is one of the earliest technologies that humans have mastered. Primitive human life is extremely difficult, living a group life. In order to survive, they make stone tools and apply grinding technology to make the stone tools have sharp edges and produce a "sharp" effect. In the Neolithic Age, the stoneware used by the primitive people was ground, the surface was fine and smooth, and the decorative effect was paid attention to, which has become the mainstream of the times. VsU mold alliance network
VsU mold alliance network
In the primitive society, as important as the grinding stone is the original coating technology. Primitive humans have a sense of beauty. In the late Paleolithic period, they used ore dyes to paint and paint small personal items. In the Neolithic period, the invention of pottery made the original color coating technology reach its peak, forming the famous pottery art in history, and unveiling the prelude of surface treatment coating technology. VsU mold alliance network
VsU mold alliance network
Surface treatment is a process for manually forming a surface layer on the surface of a substrate material that is different from the mechanical, physical, and chemical properties of the substrate. The purpose of surface treatment is to meet the corrosion resistance, wear resistance, decoration or other special functional requirements of the product. Surface treatment is to clean, clean, deburr, degrease, descale the workpiece surface. Generally speaking, there are two explanations for surface treatment in China. One is generalized surface treatment, which includes various physical and chemical methods including pretreatment, electroplating, coating, chemical oxidation, thermal spraying, etc. The narrow surface treatment, that is, only the sandblasting, polishing, etc., which we often say is the pre-treatment part. During the processing, transportation, storage, etc., the surface often has the molding sand left by the oxide scale and the rust mold. Welding slag, dust, and oil and other contaminants. If the coating can be firmly attached to the surface of the workpiece, the surface of the workpiece must be cleaned before painting. Otherwise, it will not only affect the adhesion and corrosion resistance of the coating to the metal, but also make the base metal even if it is coated. Corrosion can also continue under layer protection, causing the coating to peel off, affecting the mechanical properties and service life of the workpiece. Therefore, the surface treatment before the painting of the workpiece is an important guarantee and measure for obtaining a good quality protective layer and prolonging the service life of the product. For metal castings, our more common surface treatment methods are mechanical grinding, chemical processing, surface heat treatment, and spray coating. VsU mold alliance network
VsU mold alliance network
Surface treatment method VsU mold alliance network
VsU mold alliance network
Surface treatment before painting VsU mold alliance network
VsU mold alliance network
In order to remove various foreign objects attached to the surface of the object, a good substrate suitable for the coating requirements is provided to ensure the coating film has good corrosion resistance, decorative properties and certain special functions, and the surface of the object must be applied before painting. Pretreatment. The work done by this process is collectively referred to as pre-coating treatment or pre-treatment. VsU mold alliance network
VsU mold alliance network
Handling VsU Mould Alliance Network
VsU mold alliance network
Such as scrapers, wire brushes or grinding wheels. The rust and scale on the surface of the workpiece can be removed by hand, but the manual treatment is labor intensive, the production efficiency is low, the quality is poor, and the cleaning is not thorough. VsU mold alliance network
VsU mold alliance network
Chemical treatment VsU mold alliance network
VsU mold alliance network
It mainly uses an acidic or alkaline solution to chemically react with oxides and oil stains on the surface of the workpiece to dissolve it in an acidic or alkaline solution to remove rust scale and oil stain on the surface of the workpiece, and then use nylon. The brush roller or 304# stainless steel wire deforms the metal substrate. Since the ferroferric oxide and the ferric oxide are not plastic, they are peeled off after being broken, and the oil film is deformed together with the material, so that the workpiece with oil stains is shot blasted, Shot peening does not completely remove oil. VsU mold alliance network
VsU mold alliance network
In the existing surface treatment method of the workpiece, the best cleaning effect is blast cleaning. Sand blasting is suitable for cleaning surfaces with high surface requirements. However, the current general blasting equipment in China is composed of original bulky sand transporting machinery such as hinges, scrapers and top hoists. The user needs to build a deep pit and make a waterproof layer to install the machine. The construction cost is high, the maintenance workload and maintenance cost are great, and a large amount of dust can not be removed during the sand blasting process, which seriously affects the health of the operator and pollutes the environment. . VsU mold alliance network
VsU mold alliance network
Spraying equipment VsU mold alliance network
Absorber is used as a machine for conveying sand in foreign countries. The sand absorbing machine is actually a super large vacuum cleaner. The hopper is connected with the sand absorbing machine by a thick conveying pipe, and the sand material is sucked into the storage tank and the sand absorbing machine. The characteristics are that the construction difficulty and process are simpler than the bucket lifter, and it is convenient and easy to control, less maintenance is required, but the power consumption is large. At present, there are several manufacturers of sand absorbing machines in China, but the technology is relatively mature. Therefore, most surface treatment companies mainly use bucket elevators. VsU mold alliance network
VsU mold alliance network
Factories that need to do the spray-casting process must fully consider the actual situation of the production when selecting the sand-conveying equipment and the dust-removing equipment. Try to select the equipment with higher power than the production, because the equipment for shot blasting generally loses faster. After long-term use, problems of one kind or another will affect production. Selecting equipment with higher power will greatly reduce the time and cost of future maintenance. The insufficient power of the dust removal equipment not only damages the health of the workers, but also seriously affects the visibility of the sandblasting room. The dust discharge does not affect the quality of the sand itself and affects the surface roughness of the workpiece. VsU mold alliance network
VsU mold alliance network
The manual sandblasting room should be designed according to the actual situation, which is relatively spacious compared to the space for accommodating the workpiece. It should not be too restrictive or it will affect the manual work of the workers. At the same time, the lighting conditions must be good. For the drier areas, the sand can be placed outdoors. VsU mold alliance network
VsU mold alliance network
Plasma processing VsU mold alliance network
VsU mold alliance network
Plasma, also known as plasma, is a collection of positively charged positive and negative particles. The positive and negative charges are equal, so called plasma, which is the fourth state of matter other than solid, liquid, and gaseous. - Plasma state. VsU mold alliance network
VsU mold alliance network
The plasma surface processor is composed of a plasma generator, a gas delivery pipeline and a plasma showerhead. The plasma generator generates high-voltage high-frequency energy to generate a low-temperature plasma in the glow discharge activated and controlled in the nozzle steel pipe, by means of compressed air. Plasma is sprayed onto the surface of the workpiece, and when the plasma meets the surface of the object being processed, object changes and chemical reactions occur. The surface is cleaned, removing hydrocarbon-like contaminants such as grease, auxiliary additives, etc., or etching to roughen, or forming a dense cross-linking layer, or introducing oxygen-containing polar groups. The coating material has the effect of promoting its adhesion and is optimized for bonding and paint applications. With the same effect, the application of a plasma-treated surface results in a very thin, high-tension coating surface that facilitates bonding, coating, and printing. No other mechanical, chemical, and other strong acting ingredients are needed to increase adhesion. VsU mold alliance network
VsU mold alliance network
Plasma surface treatment in the printing and packaging industry VsU mold alliance network
VsU mold alliance network
1. Solve the problem of film opening and opening
2. Solve UV, varnish open glue problem VsU mold alliance network
3. Beverage bottles, jam bottles, sticky seals, to meet the firmness and reliability of the VsU mold alliance network
VsU mold alliance network
Plasma surface treatment in the field of automotive and shipbuilding VsU mold alliance network
VsU mold alliance network
1. Automotive sealing strip bonding surface treatment, bonding more tightly, soundproof, dustproof VsU
2. Application in the car lamp bonding process, bonding firmly, dustproof, moisture-proof VsU
3. Automotive interior surface coating, pre-printing treatment, no fading, no paint, VsU mold alliance network
4. Automobile brake pads, oil seals, bumper coating pre-treatment, bonding seamless VsU mold alliance network
5. Pre-bonding treatment of various materials for shipbuilding, bonding perfect VsU mold alliance network
VsU mold alliance network
Plasma surface treatment on ceramic surface VsU mold alliance network
VsU mold alliance network
1. Pre-treatment of ceramic coating, no primer coating, strong coating
2. Ceramic glazing pretreatment, adhesion enhancement VsU mold alliance network
Wire Industry Plasma Surface Treatment VsU Mold Union Network
1. Special cable printing, printing and printing effect is good VsU mold alliance network
2. Optical cable printing, the fastness can be compared with the laser logo VsU mold alliance network
3. Fibre printing, printing and clear wear-resistant VsU mold alliance network
VsU mold alliance network
Plasma in medical biomaterials
VsU mold alliance network
1. Surface treatment of human implant materials to meet compatibility VsU
2. Hydrophilic treatment of medical consumables VsU mold alliance network
3. Medical equipment disinfection treatment VsU mold alliance network
4. The bonding of the medical catheter after surface treatment is more firmly bonded.
VsU mold alliance network
Plasma in the textile printing and dyeing industry VsU mold alliance network
VsU mold alliance network
1. Cellulose fiber treatment, improve dyeing performance, dye uptake rate
2. Protein fiber treatment, increase hydrophilicity, adsorption VsU mold alliance network
3. Synthetic fiber treatment, increase hygroscopicity, de-static VsU mold alliance network
VsU mold alliance network
Plasma in plastic surface treatment VsU mold alliance network
VsU mold alliance network
1. Pipe surface treatment to increase the adhesion of printing
2. Toy surface treatment, favorable bonding, printing, etc. VsU mold alliance network
3. Beverage bottle cap, cosmetic surface printing, bonding VsU mold alliance network
4. Daily necessities and household appliances plasma processing VsU mold alliance network
5. Pre-bonding of the shoes to ensure that the rubber is not opened.
VsU mold alliance network
Digital products plasma surface treatment VsU mold alliance network
VsU mold alliance network
1. The phone and notebook case are bonded, the case is not lacquered, and the text does not fade. VsU Mould Union Network
2. The phone keys and the notebook keyboard are bonded, and the keyboard text is not painted.
3. Coating of mobile phone case and notebook case, not falling paint VsU mold alliance network
4. LCD flexible film circuit fits, fits more firmly VsU mold alliance network
5. Component binding before processing to ensure a strong bond VsU mold alliance network
VsU mold alliance network
Rubber and plastics industry surface treatment VsU mold alliance network
VsU mold alliance network
1. Ability to print, bond, coat, etc. VsU Mould Union Network
Plasma treatment before the bonding of glass products VsU mold alliance network
1. Windshield pre-bonding treatment, bonding more moisture-proof, soundproofing VsU
2. Laboratory bacteria culture dish hydrophilic, adhesion treatment, bacterial production uniform VsU mold alliance network
3. Display bonding pre-treatment VsU mold alliance network
VsU mold alliance network
Plasma metal surface modification VsU mold alliance network
VsU mold alliance network
1. Improve the adhesion of metal surfaces
2. Improve the corrosion resistance of metal surfaces
3. Improve the hardness and wear characteristics of metals
VsU mold alliance network
Daily necessities and household appliances plasma processing VsU mold alliance network
VsU mold alliance network
1. The surface treatment before coating, the coating is stronger.
2. Surface treatment before printing, printing does not fall off VsU mold alliance network
3. Surface treatment before bonding, bonding stable VsU mold alliance network
4. High-grade furniture surface treatment, no need to polish, direct paint, no paint VsU mold alliance network
VsU mold alliance network
Surface treatment techniques can be classified into the following categories depending on the method used. VsU mold alliance network
VsU mold alliance network
First, the electrochemical method VsU mold alliance network
VsU mold alliance network
This method uses an electrode reaction to form a coating on the surface of the workpiece. The main method is: VsU mold alliance network
VsU mold alliance network
Electroplating VsU mold alliance network
VsU mold alliance network
In the electrolyte solution, the workpiece is a cathode, and the process of forming a plating layer on the surface under the action of an external current is called electroplating. The coating can be metal, alloy, semiconductor or various types of solid particles, such as copper plating, nickel plating, and the like. VsU mold alliance network
VsU mold alliance network
Oxidized VsU mold alliance network
VsU mold alliance network
In the electrolyte solution, the workpiece is an anode, and the process of forming an oxide film layer on the surface under the action of an external current is called anodization, such as anodization of an aluminum alloy. VsU mold alliance network
VsU mold alliance network
The oxidation treatment of steel can be carried out by chemical or electrochemical methods. The chemical method is to put the workpiece into an oxidizing solution and form an oxide film on the surface of the workpiece by chemical action, such as bluening treatment of steel. VsU mold alliance network
VsU mold alliance network
Second, the chemical method VsU mold alliance network
VsU mold alliance network
This method uses no current to form a plating layer on the surface of the workpiece by chemical interaction. The main method is: VsU mold alliance network
VsU mold alliance network
Chemical conversion coating treatment VsU mold alliance network
VsU mold alliance network
In an electrolyte solution, a metal workpiece acts without an external current, and a process in which a chemical substance in the solution interacts with a workpiece to form a plating layer on the surface thereof is called a chemical conversion film treatment. Such as blue surface of the metal, phosphating, passivation, chromium salt treatment. VsU mold alliance network
VsU mold alliance network
Electroless plating VsU mold alliance network
VsU mold alliance network
In the electrolyte solution, the surface of the workpiece is subjected to catalytic treatment without external current. In the solution, due to the reduction of chemical substances, certain substances are deposited on the surface of the workpiece to form a plating process, which is called electroless plating, such as electroless nickel plating. Electroless copper plating, etc. VsU mold alliance network
