Using UniConvertor it should be quite possible to export CorelDraw graphics as HP plotter graphics. Might only work on older versions of CDR format though.
Convert CorelDRAW vector or bitmap graphics to HP Graphics Language plotter file.
We found 4 software records in the database related to .cdr to .plt file format conversion.
Microsoft Windows software - convert cdr to plt on Windows
A universal vector graphics translator
Convert from cdr file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned cdr to plt. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A set of applications used by professional graphic designers
Linux/Unix software - convert cdr to plt on Linux
A vector graphics converter for various Linux distributions
Multiplatform software - convert cdr to plt on any platform
A vector graphics editor