Indoor metal furniture powder coating

Industry knowledge

How to control the temperature, speed and other parameters in the drying and granulation process of powder coatings that can be used for indoor metal furniture? How do powder coating manufacturers ensure the particle size and uniformity of the powder?

The drying and granulation process of powder coatings is a complex physical and chemical change process, in which temperature is one of the key factors. The correct temperature setting can not only ensure the full curing of the coating, but also avoid the degradation or burning of the coating due to overheating. Generally, the curing temperature range of powder coatings is relatively wide, but for the application scenarios of indoor metal furniture, we recommend the following temperature parameters:
Standard curing: 200°C for 10 minutes. In this temperature range, epoxy resin and polymer resin can fully cross-link to form a tough coating while ensuring good decorative properties and corrosion resistance.
Low temperature curing: 180°C for 15 minutes. For some metal parts that are sensitive to temperature or require thermal stress, the low temperature curing solution is more suitable, which can ensure the performance of the coating while reducing the risk of thermal deformation.
In actual operation, the precise control of temperature depends on advanced temperature control systems and experienced operators. Our company uses the German ZEPPELIN bonding machine and automatic control system, which can accurately monitor and adjust the temperature in the drying room to ensure that the curing conditions of each batch of coatings are consistent, thereby improving the stability of product quality.
Speed ​​control mainly refers to the speed of the coating moving in the drying room or the speed of the conveyor belt. Too fast speed may cause the coating to fail to fully cure, while too slow speed may cause over-curing or burning. Therefore, it is crucial to set the speed reasonably according to the type, thickness and required curing conditions of the coating.
Optimize speed: Generally, the speed of the conveyor belt should be set so that the coating can achieve the best curing effect under the set temperature conditions. This requires experimental determination of the optimal speed range and comprehensive consideration of production efficiency and product quality.
Dynamic adjustment: During the production process, according to the real-time curing of the coating, the operator can fine-tune the speed through the automatic control system to ensure the stability of the quality of each batch of products.
Measures to ensure the particle size and uniformity of indoor metal furniture powder coatings
The particle size and uniformity of powder coatings depend first on the quality of raw materials. Our company has its own resin factory, which controls the quality of raw materials from the source to ensure the use of high-quality polymer resins and epoxy resins as the main base materials. In addition, raw materials must be strictly screened and pre-treated before entering the production line to remove impurities and ensure the purity and consistency of the particles.
Advanced production equipment and processes
Grinding and grading: Advanced grinding equipment, such as airflow mills or ball mills, is used to refine the raw materials to the required particle size range. Subsequently, particles of different particle sizes are separated through a grading screen system to ensure that the particle size distribution of the final product meets the standard.
Mixing and granulation: In the mixing stage, a high-efficiency mixer is used to fully mix the components to avoid local uneven concentration. During the granulation process, the shape and size of the particles are precisely controlled by adjusting the pressure and temperature of the extruder and the speed of the cutter.
Strict quality control
Online monitoring: Our company is equipped with SHIMADZU XRF (X-ray fluorescence spectrometer) to detect the elemental composition in the coating to ensure the accuracy of the formula; Mastersizer 3000E laser particle size analyzer is used to monitor the particle size and distribution in real time; Datacolor 400 color measurement and matching system is used to ensure the consistency and accuracy of the color.
Regular testing and calibration: All testing instruments are regularly calibrated by professional institutions to ensure the accuracy and reliability of the test data. At the same time, we regularly maintain and upgrade the production line to ensure the accuracy and stability of the production equipment.
We provide customized powder coating solutions for different customer needs. Whether it is particle size, color, gloss or curing conditions, we can adjust and optimize according to the specific requirements of customers to ensure that the final product perfectly matches the customer's application scenario.