Manual powder coating line: what equipment to choose and how to plan

Powder paint can be applied manually or automatically. The last option is most often used in large industries when it is necessary to continuously coat a significant number of products. The powder coating line does not require much human effort, the main thing is to constantly monitor it to avoid possible malfunctions.

However, such lines are not suitable for small-scale production or workshops for which powder coating is not the main activity. For example, if it is a tire service, which can also paint wheels, or the production of exclusive furniture, for which it is not profitable to send parts to paint “outside”.

If you need to apply powder to a small number of products, it is more expedient to equip a manual powder coating line at production. It is cheaper than an automated one and can be placed in any workshop. However, in this case, the quality of the coating depends directly on the painter who applies it. If a professional works for you, then the end result will not differ from that which an automatic line can give.

Next, we will tell you how best to plan a manual powder coating line and what equipment to choose, taking into account the specifics of production.

Powder coating equipment

The complete set of the powder coating area is the same for both manual and automatic versions. The part must go through the following stages:

  1. Preliminary preparation
  2. Drying
  3. Powder coating
  4. Coating polymerization

Each of these stages has its own equipment that performs these processes.

Preliminary preparation of the surface consists in degreasing the part and applying additional protective coatings. For this, a bath can be used, into which the part is immersed, or a jet-type line through which the part passes along the conveyor and is processed with the necessary solutions.

Drying takes place in a special chamber. The product is blown with hot air heated to 100-120°C. After that, you can proceed directly to painting.

The part is suspended in the powder application chamber, the painter applies paint with a spray gun. They can be dead-end or through passage. In the first, it is possible to load and unload the product through the same hole. There is a transport system in the checkpoints, that is, on one side, the product is loaded, and unloaded on the other. Also, spraying chambers are divided into one and two-station. Single-post chambers are equipped with a place for one painter. The two-post ones are equipped with places for the simultaneous work of two painters.

Then the painted product is sent to the polymerization furnace, where the coating is formed and hardened. Polymerization furnaces are also available as dead-end and through-pass ovens. After cooling, the part can be fully exploited.

Now let’s move on to the possible layout options for the plots.

Through-pass polymerization furnace. Through-pass spraying chamber, two posts

In this version, two painters simultaneously apply powder paint to the product in the spraying chamber. Painted parts are accumulated and wait for the polymerization furnace to empty, and those on which the paint has already cured are removed from the opposite side of the oven.

What are the advantages of this option:

  • Suitable for painting long pieces
  • Painted parts move less
  • Painted parts are located in a clean area of ​​the workshop
  • Less movement, to pull parts out of the curing oven or place them in it

Dead-end polymerization furnace. Spraying chamber dead-end, single-post

The minimum set of what you need for powder coating with simple equipment.

The parts are loaded into the chamber and unloaded from one side, then they are hung on the transport system, which moves them behind the polymerization oven, so as not to interfere with the removal of the parts from the oven. Loading and unloading parts into the furnace are manual.

Such a powder coating line is suitable for industries in which there is not a lot of free space for a paint application area and there is no need to paint large volumes of products. 

You should also pay attention to this option if:

  • you do not need to paint parts on both sides
  • you have dimensional products that are more convenient to paint with one painter
  • you have time for one painter to apply on his own paint on both sides

Dead-end polymerization oven. Spraying chamber dead-end, two-post

In this version, powder paint is applied to the product simultaneously by two painters, then manually removed and loaded onto the transport system. Painted parts are accumulated, wait until the polymerization furnace is free, do not interfere with the unloading of parts. Loading and unloading of products in the polymerization furnace takes place from one side.

Benefits of this option:

  • simultaneous work of two painters
  • parts with the applied powder are located in a “clean” zone
  • convenient for painting oversized items and small volumes

Depending on the needs of production, engineers think through all the elements of the powder coating line to the smallest detail and do everything to make it as convenient for painters to work with it as possible. This gives you the best solution for planning your manual powder application area.

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