Powder Scattering

Powder Scattering

Powder scattering devices (PSD) can be used across many areas of industries, from scattering powder adhesive for a bonding or lamination  application, to adding products to assist with fire retardancy etc. Available in many widths to suit your requirements, we now offer a narrow width device.

Irrespective of the polymer type used; EVA, PE, PA, PES, TPU, etc., the scattering can be achieved on web widths of up to or greater than 5 metres, from just a few g/m2 for cost-effective lamination, or higher amounts for full surface coating.

Our PSD’s use a collection roller, in conjunction with an oscillating brush, to ensure a regular scattering of the product. Capable of spreading powder from around 80 up to 500micron granules, once the required powder covering is achieved; this can then be synchronized with the speed of the production line. The required scattering width can be adjusted to be step-less and even asymmetric, if required, over the complete web width.

After scattering the powder, it is important to ensure that it stays in the correct areas over the surface of the web. Where the substrate surface is not able to maintain this, a compact Infra-Red (IR) section can be incorporated to sinter the powder to the surface. By adjusting the heat applied to achieve the desired effect, there is no damage to or uncontrolled shrinkage of the substrate.

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With minimal maintenance in mind, the powder scattering units are designed with easy maintenance access to the oscillating brush and roller, meaning reduced production downtime during servicing. A collection bin underneath the scattering device is used to gather any residual powder so that it can be reused, thereby reducing waste.

For powders with a high melting point (i.e. PEEK or PPS for composite applications), an IR oven may be required. Our designs can incorporate custom built Infra-Red ovens solutions to achieve this. The oven can be configured with several individual sections, each one having independent control. This allows each section to be set at specific temperatures over the length of the oven, with the ability to shut-off over the width of the web; thereby ensuring the best possible heat application and most efficient use of energy. The bonding process can be completed by using a two-roller nip with adjustable pressure and cooled/Teflon covered squeezing roller.

Design features include:

  • A measuring device to show the remaining powder
  • The ability to utilise a wide range of powders
  • The required working width is easily adjustable
  • The desired amount of coating can be synchronised with the speed of the calender
  • The machines are designed with minimal pollution in mind and are easily accessible for cleaning

Options available:

  • Ionisation bars for minimizing static
  • A detection system for the powder level
  • Powder supply suction hose for connection to the thermoplastic storage vessel, big bag or container
  • IR section for sintering the powder to the substrate
  • Access frame with bin and working platform
  • An automatic supply unit is available as an option, to be used in conjunction with the PSD, with a movement mechanism on a rail system for the supply nozzle
  • A feeding system based on a spiral design can be offered
  • Cover for the buffer container and side panels for the scattering area

Dryer options available:

  • Thermally insulated covers and side panels
  • The roller bed can be cooled if required
  • Teflon coated transport belts