& REPEATABILITY CONTROL - COMPACTION
OPTIMIZATION - R&D
Testing Center provides basic information necessary in designing and
controlling a dry powder compaction process. The tests are also used
for evaluation and quality control of powders not destined for
compaction. The testing capability covers a wide range of powders: metallic,
ceramic, refractories, nuclear, pharmaceutical, abrasives,
and others. A pressure holding option accommodates powders that
require time for internal reactions. The testing process is computer
controlled and automated.
A typical test takes less than 10
(for cold dies) allowing testing for direct quality control on
Powder Testing Center Model PTC-04DM offers all the features
of the older PTC-04DT and PTC-03DT versions. The main difference is
that the unit can be separated into 3 modules: testing and
control module, power module, and bulk powder testing module. Each of
the modules is light and can be shipped for service as an ordinary
small package. The bulk powder testing module is an independent unit
and can be used by itself in determining bulk powder properties:
angle of repose, bulk density, tap density, room humidity and temperature.
new software program provides a user interface that is almost
identical to all other versions of the PTC program. The program
automatically creates and stores test data files (tables and figures
data) in the csv format for spreadsheets.
an Upgrade Kit for all older versions of the PTC.
all types of powders
10 metric tons
MPa (225 TSI)
Die Temperatures: up
with MS Windows
180-584-279 mm (7.1-23-11 inches)
angle of repose
- bulk density
- tap density
- die friction
- ejection properties
- ejection energies
- green expansions
- axial strength
- energy at fracture
- radial strength
- diametral strength
- room humidity and T
CHARACTERISTICS - GRAPHS
Fixed Compact Density/Length
- pressing to a desired in-die average compact density or length
Fixed Punch Pressure - pressing to a desired
maximum pressing pressure.
Fixed Net Pressure - pressing to a desired net
The pressing position and pressure are
controlled by a high precision gauges. A motor brake stops the
compaction at a desired point. The final pressure may be held for a
selected time period before release. For hot pressing, the die (with
or without the powder) is heated to the desired temperature
immediately before the compaction.
Pressing Test Die. It may be solid, with inserts, or surface
coated. Dies made of different materials are used for friction
optimization. The mounting of a die in the test unit takes
approximately 5 minutes. This die may be used in WARM PRESSING at up
to 70oC (160 F) with a band heater and a temperature sensor.
Adaptable Test Die. This die consists of a mounting head with
supporting hardware and interchangeable die cylinders. The cylinders
are shielded with ceramic insulator bushings. These dies can test
continuously at any temperatures up to 300oC (570 F). This
die type is the most convenient and inexpensive setup for die
material optimization and lubrication studies.
in-line quality control of powder after mixing and before pressing.
If tested parameters are out of predetermined limits, the powder is
remixed or rejected.
of a lubricant content in a powder mixture
of a binder content in a powder mixture
determination of an optimum average green density for new compacts
determination of an optimum lubricant and binder content
determination of an optimum die material to minimize friction
optimizing die temperature effects
R & D:
powders and mixtures
temperature effects on pressing
optimizing die materials
improving lubricants and binders
improving product quality
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