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A composite hammer damper formed of a matrix of an elastomeric material is shown in the Figures.
English (United States)
This text was extracted from a PDF file.
100% of the total text.
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Composite Material Hammer Damper for Print Actuator Assembly
A composite hammer damper formed of a matrix of an elastomeric material is
shown in the Figures.
Referring to Figure 1, the ballistic missile assembly 1 includes a missile shaft
2, a hammer 3, a hammer damper 4 and a hammer adjustment screw 5. In
operation, the missile shaft is activated by a rotor 6 or similar actuating device
and an actuation hammer 3 impacts the print band 7. After impact the hammer 3
and the missile shaft 2 are brought to rest by the hammer damper 4.
Hammer dampers are typically made of a solid rubber. However, rubber
tends to crack and chemically break down into a gelatinous mass due to the
forces exerted thereon where the hammer strikes the damper. This deterioration
of the rubber results in a decline in the performance of the hammer and thus
leads to poor print quality.
The hammer damper of the invention is made of a composite as illustrated in
Figure 2. Rubber R, such as polyacrylic rubber or butyl rubber, is employed as a
matrix, and a thermally conductive material TCM, such as particles of aluminum,
is compounded into the rubber. The thermally conductive material serves to
dissipate the heat generated during damping which reduces the tendency of the
rubber to break down physically or chemically. Additionally a tough skin S of a
woven material, such as silk, is attached to the exterior surface of the damper so
as to provide reinforcement to the damper.