RDS_Lacktrockner_en.pdf - 第8页

8 Internal temperature monitoring For optimum hardening of the components, the RDS dryers feature internal temperatur e monitoring. Thermal elements have been installed in every heating zone, which pr ecisely measure the…

When drying using the convection process, the process

atmosphere is heated up using a hot-air fan and then flows

onto the components. The heating elements are attached

above and below the transport system. The flow speeds of

the upper and lower heating zones are individually adjus-

table so that the component is heated through evenly. This

prevents tension in the material.

Convective drying

In the combination heating process, the heat transfer is car-

ried out with infrared radiation, which is supported by central

convection heating. All heating chambers are equipped with

high-performance IR radiators. The IR radiation penetrates

the circuit board and drives out the solvents from the interior.

This enables a faster and more efcient drying process. For

the additional convection, the volume flow can be pre-set.

The heating base of all IR radiators can also be equipped

with glass covers to protect against contamination and for

easier cleaning.

Combination heating process with IR

First-class heating performance and top heat management

Upper and underside heating using convection and/or IR heating elements

Variable heating chamber length and optimum process adjustment

Flexible transport systems based on customer request

The RDS drying systems can be designed as single lane or

dual lane transport, with a pin chain conveyor and variable

width adjustment or as heavy load transport for goods

carriers based on the customer’s requirements. The optional

underfloor return transport that can be integrated offers a

space-saving solution for circuit board/goods carrier return.

The following transport variants are available:

› Single lane transport: 80 – 460 mm

› Dual lane transport: 2 x 90 – 250 mm

› Heavy load transport: based on customer requirements

Transport system

Transport

Internal temperature monitoring

For optimum hardening of the components, the RDS dryers

feature internal temperature monitoring. Thermal elements

have been installed in every heating zone, which precisely

measure the temperature in the system. The values are

displayed on the monitor. As soon as the tolerance values

are exceeded, an acoustic alarm signals and the heating is

switched off.

The exceptional thermal insulation of heating

zones and the individually adjustable tempera-

tures allow for optimum proling of your drying

processes – which are perfectly adapted to the

requirements of the products.

The exhaust system ensures safe removal of solvents

among other things. Appropriate mechanisms are attached

to the input and output of the process chamber, as well

as between the heating zones. The process exhaust air is

supplied directly to the extraction through the fan. The sub-

stances to be hardened and the exhaust products released

determine the extraction volume. The extraction function

is monitored by a pressure sensor. If there is a problem, the

heating switches off automatically and the inflow of new

components is stopped. This prevents any flammable gas

mixtures from forming in the system.

Optimum proling capability

Exhaust system and integrated extraction

Temperature curve

Process stability

thanks to clever features

Gentle cooling

to below 60 °C

After the drying process, the warm process atmosphere is extracted. Despite

this, the component still has an outlet temperature of around 60 °C. A separate

air or water-cooled cooling unit is available as an option, and can be used to

achieve signicantly lower temperatures.

In the air-cooled cooling line, the hot process exhaust air is extracted via the

attached exhaust hoses. As well as this, cold ambient air is aspirated and blown

in via the panel of nozzles to cool the components. With the water-cooled cooling

option, the cooling process is carried out via heat exchangers. There is the option

of controlling the cooling process precisely with separately adjustable fans in the

individual zones and influencing the cooling gradient accordingly.

Implementation of optimum outlet temperatures

Optional air or water-cooled cooling unit

Temperatures can be set individually

System also available without cooling line