Basic Info.
Model NO.
HVAF
Control Type
Full Closed-Loop PLC Control
Porosity
Between 0.1 and 0.3 Percent
High Deposition Efficiency
5-30 M,15-45 M (Hvof Mode)
Powder Feeding Efficiency
0.26kg/H
Fuel
Propane and Compressed Air
Transport Package
Wood
Specification
powder feeder, spray gun and control cabinet
Trademark
Lijia
Origin
Zhengzhou, China
HS Code
8424899990
Production Capacity
100/Year
Product Description
| Component | Characteristic | Parameter |
| HVAF Control cabinet | 1. Imported core parts, full closed-loop system, Mitsubishi high performance PLC control 2. Solid design, pressure sensor and solenoid valve all imported from Europe and America, the quality is the same as the European and American equipment. 3. Touch screen operation, intelligent automatic operation; 4. Process parameters are clear on the touch screen panel; 5. One-key operation can realize automatic and real-time detection of spraying process, and multiple alarm prompts can make immediate response to system failure. | 1. Program control: full closed-loop PLC control 2. Interface control: 15-inch touch screen 3. Flow control: mass flow controller + electric pressure regulating valve 4. Propane pressure: 1.0mpa 5. Air pressure: 1.1Mpa 6. Carrier gas pressure: 1.0mpa 7. Propane flow rate: 0~50kg/h 8. Air flow rate: 400-600m /h 9. Carrier gas flow: 0~100L/min 10. Main parts producing areas: America, Japan and Italy |
| Component | Characteristic | Parameter |
| E-2000 Powder feeder | 1. The powder feeder is a high-precision powder feeding mechanism based on the principle of toothed dial with vibration structure and gravity falling, with uniform powder output and wide particle size range. 2. After the top cover is sealed, the powder condition in the powder cylinder can be clearly seen through the visual transparent observation window on the powder cylinder. 3. Nitrogen or argon with small flow is used as powder gas. The powder is rotated to the powder outlet along with the powder tray at the bottom and enters into the spray gun together with the powder gas. 4. Adopting the latest international turnover structure, it is convenient to clean the powder, which can be discharged from the lower mouth, or can be poured from the barrel body. | 1. Powder feeding: toothed dial 2. Cleaning method: barrel body flip 3. Volume of powder storage tube :2L 4. Powder feed gas: nitrogen 5. Powder feeding air pressure: 0.15-1.2mpa 6. Powder feeding speed :0~500g/min 7. Powder feeding accuracy :±1% 8. Powder size :1~150 m |
| Item | Coating properties (WC as an example) | Other features (WC as an example) |
| LA2 supersonic flamethrower | 1. Hardness: 1050-1400HV0.3 2. Porosity: less than 0.5% 3. The coating generates residual compressive stress 4. The oxide content in the coating can be ignored | 1. Powder size: -30+5 m, -30+10 m 2. Particle velocity: about 935m/s 3. Deposition rate: 40-55% 4.Maximum spraying rate: 30kg/h |
| LA3 supersonic flamethrower | 1. Hardness:1050-1600HV0.3 2. Porosity: less than 0.5% 3. The coating generates residual compressive stress 4. The oxide content in the coating can be ignored | 1. Powder size: -30+5 m, -30+10 m, -40+15 m 2. Particle velocity: about 935m/s 3. Deposition rate: 40-62% 4. Maximum spraying rate: 35kg/h |
HA-2000 has many functions and features, and its advantages are mainly reflected in the following aspects:
1) Touch screen operation, the design structure of the equipment adopts full closed-loop automatic control structure, the gas is all controlled by pressure sensors imported from the United States and pressure regulating valves imported from Japan, the pressure can be monitored in real time and automatically reach the set value of the process.
2) The fuel is propane and the combustion-supporting agent is air, which is the safest combustion mode among the gas models in the market at present;
3) The structure of the spray gun is designed according to the principle of the rocket generator. The flame flow speed reaches over 2000m/s, with large output power and stepless adjustment;
4) The spray gun adopts axial center powder feeding. This new injection method makes the powder dissolve well and distribute evenly in the whole flame, which improves the coverage efficiency and coating quality;
5) It has the function of process recipe storage and invocation. Parameters can be added, modified and saved.
6) The system fuel adopts full closed-loop design, modular design, high-performance PLC control, safe and simple operation;
7) The coating produced has excellent performance with low porosity less than 1% (average porosity less than 0.5%) and high spray efficiency (up to 30KG powder per hour).
Chromium plating is a traditional surface plating technology, which has been used for more than 70 years. The chromium plating layer has high hardness, wear resistance, corrosion resistance and can keep the surface bright for a long time, and the process is relatively simple and the cost is low. For a long time, chromium coating is not only used as decorative coating, but also widely used as wear-resistant and corrosion-resistant coating for mechanical parts. Hard chromium plating is often used to repair damaged parts.
However, hard chromium plating process can cause serious environmental problems. It's not chromium itself that causes environmental problems,
It's the chromium plating process. Chromium is an inreactive element and can be safely used in everyday products and artificial joints.
The main problem is that the chromic acid solution used in the chromium plating process produces acid mist containing Cr(VI) and waste water. Therefore, countries on
Restrictions on chrome plating will get tighter. The United States, for example, switched the current air emission standard for hexavalent chromium from
0.1Mg/M 3 decreased to 0.0050 ~ 0.0005Mg/M 3. According to the U.S. Navy Department estimates, the U.S. Navy alone will need a one-time investment of $22 million to upgrade equipment after the implementation of the standard, and then will spend $46 million a year on collection, processing and other costs.
In addition, hard chrome plating has some other disadvantages:
(1) the hardness of electroplating hard chromium coating is generally HV 0.3 800 ~ 900, far less than some ceramics and cermet materials of high hardness and good wear resistance, and the hardness of hard chromium coating in the temperature rise will be due to the release of its internal stress and rapidly reduce, its working temperature can only be lower than 427ºC, Therefore, it is difficult to adapt to the working requirements of modern machinery under high temperature and high speed.
(2) There are micro-cracks in the chromium plating layer, which will inevitably produce penetrating cracks (as shown in Figure 1), leading to corrosive media infiltrating from the surface to the interface and corroding the substrate, resulting in rust spots or even peeling on the surface of the coating.
(3) plating process deposition speed is slow (about 25μm/h), plating 0.2 ~ 0.3mm thick coating often needs 2 ~ 3 classes of time, is not conducive to the application of thick coating.
Therefore, people have been trying to find a coating process to replace hard chromium plating. With the recent development of coating technology
Continuing to evolve, there are coatings that have proven cleaner, more effective, and even more effective than hard chrome plating
Lower cost. These coating technologies include physical vapor deposition (PVD), chemical vapor deposition (CVD), and laser coating
Layer technology and thermal spray technology, etc., where supersonic flame spray (HVOF) coatings cost hard with electroplating
Chromium coatings are comparable to some powder materials that are already cheaper than plating, and are still being reduced while plating hard chromium
Coating costs are rising, more importantly, thermal spraying coating technology in textile machinery, paper, aviation
The surface has been used successfully.
However, hard chromium plating process can cause serious environmental problems. It's not chromium itself that causes environmental problems,
It's the chromium plating process. Chromium is an inreactive element and can be safely used in everyday products and artificial joints.
The main problem is that the chromic acid solution used in the chromium plating process produces acid mist containing Cr(VI) and waste water. Therefore, countries on
Restrictions on chrome plating will get tighter. The United States, for example, switched the current air emission standard for hexavalent chromium from
0.1Mg/M 3 decreased to 0.0050 ~ 0.0005Mg/M 3. According to the U.S. Navy Department estimates, the U.S. Navy alone will need a one-time investment of $22 million to upgrade equipment after the implementation of the standard, and then will spend $46 million a year on collection, processing and other costs.
In addition, hard chrome plating has some other disadvantages:
(1) the hardness of electroplating hard chromium coating is generally HV 0.3 800 ~ 900, far less than some ceramics and cermet materials of high hardness and good wear resistance, and the hardness of hard chromium coating in the temperature rise will be due to the release of its internal stress and rapidly reduce, its working temperature can only be lower than 427ºC, Therefore, it is difficult to adapt to the working requirements of modern machinery under high temperature and high speed.
(2) There are micro-cracks in the chromium plating layer, which will inevitably produce penetrating cracks (as shown in Figure 1), leading to corrosive media infiltrating from the surface to the interface and corroding the substrate, resulting in rust spots or even peeling on the surface of the coating.
(3) plating process deposition speed is slow (about 25μm/h), plating 0.2 ~ 0.3mm thick coating often needs 2 ~ 3 classes of time, is not conducive to the application of thick coating.
Therefore, people have been trying to find a coating process to replace hard chromium plating. With the recent development of coating technology
Continuing to evolve, there are coatings that have proven cleaner, more effective, and even more effective than hard chrome plating
Lower cost. These coating technologies include physical vapor deposition (PVD), chemical vapor deposition (CVD), and laser coating
Layer technology and thermal spray technology, etc., where supersonic flame spray (HVOF) coatings cost hard with electroplating
Chromium coatings are comparable to some powder materials that are already cheaper than plating, and are still being reduced while plating hard chromium
Coating costs are rising, more importantly, thermal spraying coating technology in textile machinery, paper, aviation
The surface has been used successfully.
