Powder Coating Line

Your Professional Powder Coating Line Supplier

Qingdao Shengda Leading Machinery Tech Co., Ltd is(SDL) the export company of (S.S.D) Shandong Shengshida Tecnnology Co., Ltd.,SSD was established in 2005 and listed on the stock in 2015 (NEW Three Board)

SDL is committed to delivering sustainable, trustworthy, and reliable powder machinery and powder raw materials such as epoxy resin and polyester resin. We have been serving the industry for over 15 years, and our experience makes us a prominent manufacturer and supplier. Our top priority is customer satisfaction, and we strive to provide exceptional service and competitive pricing, establishing long-term partnerships with our clients for more than 30 countries. Our dedication to quality and eco-friendliness ensures that our customers receive nothing but the best. Let SDL be your reliable partner; we are here to help you succeed.

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Why Choose Us

Patent Certification

The company has 77 valid patents, 1 computer software copyright and intellectual property system certification, ISO9001 certification, ISO14001 certification, CE certification, explosion-proof certification, dual-soft certification and many other certifications.

Excellent Service

Our top priority is customer satisfaction, and we strive to provide exceptional service and competitive pricing, establishing long-term partnerships with our clients for more than 30 countries. Our dedication to quality and eco-friendliness ensures that our customers receive nothing but the best.

Rich Experience

We have been serving the industry for over 15 years, and our experience makes us a prominent manufacturer and supplier.

High-Tech Enterprise

The company is a national high-tech enterprise integrating research, design, manufacture of powder machinery and providing integrated solutions for powder production lines.

Engineering Capabilities for Customizing Lines

Any sizes of painted parts. We produce various types of lines for painting metal parts of any size and various shapes. From lightweight small-sized furniture components to large-scale construction structures up to 14 m long.

Any production capacity. Based on the required product painting program, we design the required operating speed of the conveyor. By knowing the required processing time, we plan sufficient lengths of active zones at each technological stage.

Any available energy sources. All types of combustible fuels can be used as the main energy carrier in the lines: fuel oil, diesel fuel, natural and liquefied gas. Or electricity — From traditional heating elements to IR emitters.

Compact layout. Structural flexibility allows the line to be placed in rooms of any shape. We take into account regulatory requirements and the convenience of the location of loading / unloading areas of the conveyor for optimal logistics of blanks and painted products.

Possibility of upgrading lines throughout their operation. Our customers can increase line capacity as their paint program grows, change surface preparation cycles, or simply move lines to new industrial premises.

The main capacity production line

Capacity 70-150kgs production line

It is usually suitable for small and medium-sized production lines, and its specific configuration and process flow will vary depending on the type of product (eg： epoxy, polyester, hybrid, etc.) and the degree of automation.

Capacity 200-300kgs production line

The powder coating line is mainly composed of the following key systems, which work together to achieve a stable capacity of 200 - 300kgs.

Feeding system
The automatic feeding equipment can realize the accurate measurement and transportation of a variety of raw materials (such as resins, curing agents, pigments, fillers, etc.).

Extrusion compounding system
This is the core part of the production line, which mainly includes the extruder and the corresponding supporting equipment.

Cooling belt &tableting system
The molten material extruded from the extruder is cooled and solidified by a cooling tableting unit.There are 2 type of Cooling type available . one is the air cooling +water cooling with stainless Steel slat cooling crusher; the other is the water cooling system with stainless cooling belt including the nozzle spray under the stainless belt while carry the melt powders.

Crushing system
After cooling and pressing the flakes, the flakes enter the crushing system, and the flakes are crushed into smaller particles by the crusher.

Packaging system
The qualified powder coatings are quantitatively packed by the packaging machine.

Capacity 300-400kgs production line

Main equipment specifications
Twin screw extruder: the output needs to reach 300 - 400kgs/h, the motor power is generally 30 - 55kW, and the screw speed can be adjusted, usually 100 - 300r/min.

Mixer: The batch capacity is determined according to the capacity, if the production capacity is 300 - 400 kg per hour, the mixer may mix 50 - 100 kg per time, the mixing time is about 5 - 10 minutes, and the motor power is 5 - 15kW.

Crushing and screening machine: the crushing capacity needs to match the output of the extruder, generally 300 - 500kgs/h, and the screening efficiency is not less than 95%.

Capacity 500-600kgs production line

Small and medium-sized powder coating manufacturers: suitable for enterprises in the development stage, with relatively stable market demand but not yet reaching large-scale production, to meet their daily production order needs.

Multi-variety and small-batch production: For enterprises that need to produce powder coatings with multiple colors and different properties, the production line of this capacity has a certain degree of flexibility, and can easily carry out operations such as color change and formula change, so as to meet the diversified production needs of small batches.

Supporting production: It can provide supporting powder coating production for some downstream manufacturing enterprises (such as furniture factories, hardware products factories, etc.) to achieve on-demand production and reduce inventory pressure.

Working principle of grinding mill

Micro grinding mill system of Series ACM

After cooling and pressing the powder chips flakes, the flakes have been carried to the ACM mill machinery. which composed of high speed air classifying mill , cyclone rotary screen ACM mill system, centrifugal sifter super-fine powder collector and blower. The raw material is ground to be fine powder by high speed impacting, Particle size classifying in mill ,cyclone separating and superfine powder collecting. A perfect particle size distribution of powder coating can be obtained by regulating the running parameters of ACM system.

Parameter

Powder Flow Rate:	Controls the amount of powder dispensed from the gun, affecting coating thickness.
Spray Gun Voltage (Kilovolts):	High voltage used to electrostatically charge the powder particles, ensuring good adhesion to the part.
Spray Gun Current (Microamps):	Controls the intensity of the electrostatic charge, impacting powder deposition.
Air Pressure:	Regulates the powder spray pattern and helps reach hard-to-reach areas.
Conveyor Speed:	Determines the time the part spends under the spray gun, influencing coating thickness and coverage.
Oven Temperature:	Crucial for melting and fusing the powder particles to form a solid coating.
Curing Time:	The duration the part stays in the oven at the set temperature for complete cross-linking of the powder.
Film Thickness:	The final thickness of the powder coating layer, which should be within the desired specification for the application

Specification

Model

Capacity

(kg/h)

Main Power(kw)

Rotary Speed(r/min)

Separator Power(kw)

Classifier

(rpm)

Feeder Speed(rpm)

Feeder Power(kw)

Fan Power(kw)

Sepatator Efficiency

Filtration Area(m²)

Compressed Air Consumption(m³/min)

Powder Size(mesh)

ACM-60

1500

5000

7.5

600-3000

27-135

1.1

≥98%

0.8

80-400

Model

Roller diameter(mm)

Belt Width(mm)

Drive Power(kw)

Fan Power(kw)

Cooling type

Overall dimension(mm)

GYJ-815

377

1500

8.5

0.37

Water

9100x1710x1460

Model

Screw diameter(mm)

Capacity(kg/hour)

Screw speed(r/min)

Main Power(kw)

Heating power(kw)

Overall dimension(mm)

SLJ-90

1500

500

110

3860x2600x1050

Advantages of Powder Coating Line

Superior environmental performance: The powder coating process basically does not emit vocs (volatile organic compounds), superior environmental performance and improved working environment.

Efficient production: Powder coating adopts integrated technology, the production process does not produce waste water and gas, strong environmental performance, and no flammable and explosive safety hazards. The curing process takes only 3-5 minutes, the whole coating production cycle takes only 2-5 hours, the delivery time is 15-25 days, the duration of time is only 50% of the equivalent painting process.

High recycling rate of coating powder: The coating powder can be recycled and the recycling rate reaches more than 95%, which saves resources and reduces costs.Many manual powder coating booths operate with a spray-to-waste system. The excess powder is not reclaimable and leads to unnecessary wastefulness. Automated powder coating lines with powder reclamation systems can almost eliminate waste from the coating process.
Automated powder coating lines may cost a little more than manual systems upfront, but they can save money over time. Companies can use automated systems to reduce the number of professionals needed to maintain powder coating output levels. Companies that save money on reclaimed powder, improved uptime, and fewer quality control issues often pass along these benefits to the customer in the form of faster turnaround times, improved performance, and improved value.

Excellent film performance: One-time film thickness of 50-80μm, adhesion, corrosion resistance and other comprehensive indicators are better than the painting process. The product has strong scratch resistance (hardness of 2-3h), liquid resistance and resistance to yellowing performance is far beyond the traditional paint.

Strong waterproof and Moisture-proof performance: The barrier rate of the powder coating product to water vapour is as high as 99% or more, with superior waterproof, moisture-proof and mildew-proof performance, effectively preventing the effects caused by water vapour and moisture and other harsh environments.

Excellent surface effect: Electrostatic adsorption principle makes the surface of the panel more complete, uniform, not easy to deform, stain-resistant and easy to clean, easy maintenance.

Diversified painting effect: One production line can complete all painting effects (sand grain, matte, high gloss, etc.), the overall cost per square metre is 10%-30% lower than the traditional oil-based paint or water-based paint, which improves the efficiency and reduces the energy consumption and cost.

Anti-bacterial and Anti-yellowing: Powder coating spray products can achieve 99% anti-bacterial rate, anti-yellowing resistance of more than 5 years, to maintain the durability of the painted surface.

Uniformity：Powder coating offers more uniform results than paint regardless of the application method. Automated systems can offer slightly more uniform results in some cases, because each batch sits in the same position and receives the same treatment at each stage of the process. Manual powder coating activities can result in skipped steps or missed coating areas.

Efficiency：Automated powder coating lines use conveyor systems to transition parts from stage to stage of the automated system. Companies can choose to automate all or part of the powder coating process for better control and quality assurance. Some businesses need to manually control part of the process to accommodate customer requests. Automated systems setups can accommodate both routine production demands and improve turnaround times for special requests.
Traditional spray booths can only move a limited number of parts through the process. Automation takes the legwork out of the process for better efficiency across the board.

Extruder

The main components of the extruder include:

Host
The host is the core part of the extruder, including the motor, reducer, screw, barrel, etc. The motor provides power, and the reducer converts the high-speed rotation of the motor into the low-speed rotation of the screw. The screw is the key component of the extruder, responsible for pushing the material from the feed port to the discharge port. The barrel is the outer shell of the screw, which is used for heating and temperature control.

Auxiliary machine
The auxiliary machine includes the feeding system, the shaping box, the tractor, the cutting machine, etc. The feeding system is responsible for feeding the raw materials into the extruder, the shaping box is used to shape the product, the tractor is used to pull the product out of the shaping box, and the cutting machine is used to cut the product into the required length.

Control system
The control system includes PLC, temperature control system, pressure sensor, etc. PLC is used to control the entire extrusion process, the temperature control system is used to control the temperature of the barrel and screw, and the pressure sensor is used to monitor the pressure changes during the extrusion process.

Mold
The mold is the end component of the extruder, used to shape the product. The design and selection of the mold have an important influence on the shape and performance of the product. The mold is usually made of metal and has a certain cooling system to ensure the molding quality of the product.

Cooling system
The cooling system is used to cool the extruded product to prevent deformation or damage. The cooling system usually includes a cold water tank, air cooling system, etc. to ensure the cooling effect of the product.

Key Features of Powder Coating Line

Environmentally friendly

The powder coating line uses a dry spraying process without the use of organic solvents, so it does not produce any harmful gases or waste water, which is in line with modern environmental protection requirements. In addition, the powder coating can be recycled, thus reducing the amount of waste materials.

Efficiency and Economy

The raw material utilisation of the powder coating line is high, and the powder beyond the range of the gun can be recycled, reducing material costs. Compared with traditional liquid coatings, powder coating has significant advantages in productivity and material costs, improving productivity and reducing production costs.

Excellent coating performance

The powder coating has strong adhesion, high coating hardness, good abrasion and corrosion resistance. After pre-treatment of the coating, a one-time construction to obtain sufficient coating thickness, without primer, and high edge coverage, impact resistance and toughness.

Automation and Flexibility

The powder coating line can spray any shape and size of object without thickness limitation, with great flexibility. The spraying process does not require special equipment and environment, low production cost and high production efficiency.

Process flow

The process flow of the powder coating line includes pre-treatment, high-temperature baking, electrostatic spraying, curing, cooling and stripping, quality inspection and packaging steps. Each step ensures the adhesion, colour and uniformity of the coating and the final product meets high quality standards.

Key Application Areas of a Powder Coating Line

Manufacturing industry Powder coating is widely used in the surface coating of metal products, mechanical equipment, electronic products, etc., which can improve the corrosion resistance, abrasion resistance and aesthetics of the products.

Automobile industry Automobile parts and body structures are often powder coated to protect the surface of the vehicle from daily wear and tear, chemical corrosion and weathering.

Furniture and Decoration Furniture, interior decoration and building materials are often powder coated to give products a variety of colours and textures and to enhance the aesthetics of the interior environment.

Electrical industry Electrical equipment and household appliances shell often use powder coating for surface coating to improve durability and appearance of texture.Refrigerators, for example, are powder coated on the outside to give a smooth and durable finish. The coating is resistant to fingerprints, smudges and scratches, which is important for maintaining a clean and presentable appearance in a household environment.

Architectural applications In architecture, powder coating systems are used to coat building components such as window frames, doors and railings. Powder coated window frames have excellent weather resistance, helping to maintain the integrity and appearance of the window over time. They can withstand temperature changes, rain and wind without deterioration.

Outdoor facilities

Urban public facilities, outdoor billboards, garden facilities, etc. Often use powder coating to improve their weather resistance and durability.

Industrial equipment

Industrial machinery, pipelines, steel structures, etc. Often use powder coating to prevent corrosion and extend service life.

Medical equipment

Some medical equipment and instruments need to have a certain surface smoothness and corrosion resistance, powder coating can meet these requirements.

Types of Powder Coating Line

Automatic spraying line: It is composed of wire feeding mechanism, loading mechanism, coating mechanism, etc. It has the features of simple and compact structure, high degree of automation, convenient operation and maintenance, etc. It is suitable for electrostatic spraying and powder coating on the surface of plastic products.

Semi-automatic spraying machine: Adopting manual or foot-operated paint supply system, with safety protection function, suitable for electrostatic spraying and powder coating on the surface of workpieces of various shapes, which is one of the most widely used models in china.

Manual sprayer: By manual loading and hand wheel to control the paint flow, suitable for the occasions that require high flexibility in operation.

Automatic electrostatic spraying line: Integrating the advantages of various processes, including heating, dust removal and air extraction devices, suitable for high requirements of electrostatic coating and powder coating operations on the surface of plastic parts.

Roller-type electrostatic powder coating line: Using mechanical principles for material melting and cooling, suitable for occasions requiring customised configurations.

Horizontal screw extrusion moulding line: Mainly used for pp/pe/pvc and other resin raw materials extrusion moulding processing.

Twin-screw extrusion moulding line: Using physical mixing principle to make materials mix well and evenly, suitable for occasions requiring ideal mixing effect.

Our Certificate

Our Services

Our top priority is customer satisfaction, and we strive to provide exceptional service and establishing long-term partnerships with our clients for more than 30 countries. Our dedication to quality and eco-friendliness ensures that our customers receive nothing but the best. Let SDL be your reliable partner; we are here to help you succeed.

We Promise :

1. Efficient response within 48 hours.

2. Technical Support.

3. Installation and commissioning Services available when required.

4. Record Installation Video , Download Or Watch For Free In The Future.

5. Upgrading service offered.

FAQ

Q: What is the most common problem with powder coating?

A: One common powder coating problem is incomplete or uneven coverage of the coated surface. This issue can be caused by multiple factors, such as insufficient electrostatic charge, improper spraying technique, poor grounding, or inadequate cleaning and pretreatment of the substrate.

Q: Reasons and solutions for the workpiece not absorbing powder?

A: Causes: Low voltage of electrostatic spray gun, poor contact of workpiece, excessive exhaust volume in powder spraying room, etc.
Solution: Check the spray gun wiring and voltage, ensure good contact and grounding of the workpiece, and adjust the exhaust volume in the powder spraying room.

Q: What are the requirements for powder coating?

A: For powder coating, you'll usually need a corrosion-resistant primer since this will prevent rusting and corrosion under the powder coating. This is the best way to ensure the coating can do its job and last longer. Typically, an epoxy primer should be used for this, so make sure you have this to hand.

Q: What are the measures for dealing with excessive powder on the workpiece?

A: Treatment measures: adjust the powder output and electrostatic voltage of the spray gun, adjust the conveyor chain speed, and optimize the distance and arrangement between the spray gun and the workpiece.

Q: What are the causes and preventive measures for powder coating agglomeration?

A: Cause of the problem: Powder is damp, heated, stored for an extended period, and subjected to heavy pressure, etc.
Preventive measures: Store in a dry and cool place and seal the container, use within the shelf life, and ensure that the container can withstand heavy pressure.

Q: Does powder coat powder have a shelf life?

A: How long can powder be stored? If kept in these optimal conditions, powder should have no problem maintaining a shelf life of 6-8 months and perhaps longer. Using powder that has been stored beyond the 6-8 month shelf life can sometimes cause issues.

Q: How to deal with gun blockage?

A: Treatment method: sieve the powder, clean the nozzle regularly, and increase the powder delivery air pressure.

Q: How to solve the honeycomb appearance of powder coating?

A: Solution: Reduce the thickness of the powder coating spray layer, or use an electrostatic friction spray gun instead, and ensure that the distance between the spray gun and the object to be coated is appropriate.

Q: How to deal with the color of the coating film being off and yellowing?

A: Treatment method: Use a powder coating variety with good heat resistance or adjust the formula, reduce the baking temperature, and adjust the conveyor chain speed to shorten the baking time.

Q: What is the 7 times process in powder coating?

A: The 7 Tank Process for powder coating on metal is composed of the following steps: Degrease Rinse Pickling Rinse Phosphating Rinse and Passivation In some cases, we use Activator before Phosphating Also known as the zinc phosphating process.

Q: What is the 3 in 1 solution for powder coating?

A: Three in One Solution converts the surface to a complex iron phosphate compound which is totally passive to oxidation. The treated articles can be oiled or painted directly for further rust resistance. Three in One Solution can be applied either by wiping or by dipping the articles in the solution.

Q: Does powdercoat fade in the sun?

A: Exposure to Sunlight: Powder coating, like any other finish, is susceptible to continuous exposure to direct sunlight, causing it to fade over time.

Q: What is the solution for coating loss and discoloration?

A: Solution: Clean the entire system and powder spraying room when changing the type and color of powder coating, control the baking temperature and time within the process conditions, and improve the heat resistance of powder coating.

Q: How can you tell if powder coating is good quality?

A: Running a hand across the finish, when combined with visual examination, makes it easy to determine a smooth finish. The PCI smoothness scale is great for establishing production tolerances, but visual and tactile examination is sufficient to evaluate quality differences across single parts.

Q: How long does powder coat take to fully cure?

A: Curing usually takes less than 25 minutes. The exact time and temperature used to cure a coated surface depend on several factors, including the size of the part, the thickness of the coating and the coating material used.

Q: How to solve uneven coating?

A: Solution: Adjust the spraying parameters to ensure uniform powder spray; keep the spray gun at an appropriate distance from the workpiece; ensure stable high-voltage output and air pressure.

Q: How to solve the orange peel on the coating surface?

A: Solution: Change the spray gun method to improve the uniformity of the coating; adjust the spray gun atomization air pressure; ensure that the curing temperature is appropriate and strictly cure according to the baking process standards; improve the powder storage conditions and purchase qualified powder.

Q: Why is my powder coat cracking?

A: If powder coating is so strong and durable, what causes it to crack or chip? If a surface is not properly pre-treated before it is powder coated, sediment or corrosion can cause the powder coating to crack or chip.

Q: What are the reasons for the low production efficiency of the powder spraying line and improvement measures?

A: Cause of the problem: Frequent equipment failures, unskilled operation, unreasonable process parameters, etc.
Improvement measures: Strengthen equipment maintenance to reduce the failure rate; train operators to improve their skills; optimize process parameters to improve production efficiency.

Q: What is the life expectancy of powder coating?

A: 15-20 years
Most powder coating applications last for 15-20 years. These coatings are highly resistant to weather, chemicals, and corrosion, and offer electrical insulation, and vibration and sound deadening benefits.

As one of the leading powder machinery manufacturers and suppliers in China, we warmly welcome you to buy advanced powder machinery from our factory. All equipment are with high quality and competitive price.