DGAP-News

PVA TePla AG: High-vacuum diffusion bonding - Introduction into industrial series application is being prepared

DGAP-News: PVA TePla AG / Key word(s): Market launch
PVA TePla AG: High-vacuum diffusion bonding - Introduction into
industrial series application is being prepared

27.10.2014 / 10:00

---------------------------------------------------------------------

* Highly efficient series production through flexible and automated process
control as well as product-specific loading facilities

* Process homogeneity and accuracy paired with maximised
component / batch size

* Suitable for materials that are extremely sensitive to reactions, such as
titanium

* No filler materials, no post-processing of the components required


PVA TePla AG, Wettenberg, Germany, is launching a high-vacuum diffusion
bonding installation ("MOV 743 HP") designed for series applications. The
high-vacuum system is designed for process quality, reliability and a
maximised component and batch size.

Benefits of diffusion bonding
By means of a hydraulic pressing device, the joining areas of the component
to be joined are pressed against each other powerfully, therefore bringing
them in close contact. By solid-state diffusion a virtually pore-free
composite material emerges which meets highest mechanical, thermal and
corrosion technical requirements. A key feature of diffusion bonding is
that usually no filler material is used so that the joint does not have any
foreign alloy components and therefore has properties similar to base
materi-als when properly executed. Due to the absence of a molten phase in
the joining process, highly accurate and exact contour bonding of precision
components can also be guaranteed. Examples of the preferred application of
the diffusion bonding in this con-text are micro-coolers and/or
micro-reactors that are characterised by extremely fine channel structures
near the joint.

Performance features of the new installation
Due to an optional force or displacement control, the new installation
allows industrial customers to optimally adapt the process and to
counteract deformation damage and therefore unnecessary rejects. This
ensures an improved total cost of ownership (TCO) and accelerated process
development. The pressing plates are 900 mm x 1000 mm in dimension and are
homogeneously actuated via several pressing stamps by means of proprietary
technology from PVA TePla. This ensures an optimised homogeneity in the
distribution of the press force. A constant and oscillating force
application can be flexi-bly programmed in the process sequence. Up to 400
tonnes of press force offers the user a high degree of variability in the
component sizes to be processed and the mate-rial requirements.
Furthermore, integrated rapid cooling ensures the shortest process times.