Condenso_Series_EN.pdf - 第6页

6 With all Condenso series systems, the soldering process takes place in a hermetically sealed process chamber made of aluminium or a mix of stainless steel and aluminium. The process chamber is tted with high-quality e…

With the Condenso series, a far greater amount

of exibility is available for the condensation

soldering process than can be achieved with

the conventional method. Using the injection

principle and temperature and pressure (vacu-

um) control ensure more accurate and versatile

reow proling.

The soldering process takes place in a hermet-

ically sealed process chamber. A lm of fluid

builds up during condensation soldering using

the heat-conducting medium Galden

, which

surrounds and vaporises the entire assembly.

The steam condenses on the assembly until a

soldering temperature of 240°C (e.g. when using

HS240) is achieved. Galden

is a perfluorpolyether

– fluid polymers that consist of carbon, fluoride

and oxygen. Rehm applies a patented injection

principle to improve control of the condensation

phase. Exactly the right amount of Galden

incorporated at the right time. Then, during this

process, redundant, latent heat is used when

changing the state of the medium from vaporous

to fluid to evenly and steadily heat the assembly.

The max. temperature of the assembly cannot

exceed the max. boiling/condensation temper-

ature of the medium to ensure the components

don’t overheat.

The temperature/reflow prole of the assembly

can also be accurately adjusted by precise fluid

volume control and intermediate steam extraction.

Therefore, reproducible soldering conditions are

ensured that increase process stability. A vacuum

option is available with all Condenso systems for

optimum results that are virtually void-free.

Condenso – a patented principle

with clear advantages

With all Condenso series systems, the soldering process

takes place in a hermetically sealed process chamber made

of aluminium or a mix of stainless steel and aluminium. The

process chamber is tted with high-quality electric panel he-

aters that ensure optimum process conditions. The assem-

bly is heated up to soldering temperature by injecting and

vaporising Galden

. Steam allows for optimum heat transfer

to the soldering material. The heating systems’ target

temperature value remains constant. Therefore, excellent,

reproducible soldering results are ensured. The Galden

fully extracted after the soldering process, and air is blown

in via a nozzle system to gently bring the assemblies to

lower temperatures before the actual cooling process. The

systems can be optionally tted with a viewing window or

camera so that the soldering process can be observed and

analysed. Soldering defects can be detected and eliminated

in a timely fashion as a result.

Hermetically sealed Process Chamber

for soldering, vacuum and cooling

Heating plate PCB

Process chamber structure for Condenso Optional viewing window with camera

Galden

storage container

Filter granules

Low medium consumption

Resource-conserving and efcient

After soldering, the assembly is passed onto the cooling process. Process gas is extracted and cleaned

at the same time. Therefore, a large part of the Galden

can be reused – which is a solution that saves

a great deal on materials, and is environmentally friendly! A vacuum is created during extraction which

also ensures that soldering material is dried quickly.

The extracted Galden

is ltered and cleared of impurities

using granules. Approx. 99.9 % of the medium can be

recovered as a result. The cleaned fluid is made available

in a container for other processes. “Loss of vaporisation” is

low during soldering due to hermetically sealing the process

chamber. As well as little need for maintenance, you benet

from low medium consumption, and save money as a result.

› No loss of vaporisation in the process chamber

› Medium filtering and re-use

› Environmentally friendly

Condenso series | Medium consumption