HP Jet Fusion 300 User Guide - Page 42

the clearance area to fuse. This example highlights how, in order to design a successful assembly

Page 42 highlights

- The inner circle with the HP logo will rotate freely after bead blasting although the clearance is quite low (less than 0.7 mm). This is because there is a small surface area of "contact" between the two surfaces that must freely move and an easy escape path for the unfused material to be removed during bead blasting. - The outer circle contained in the white mesh cage typically requires more time bead blasting to remove all unfused material and more time "working" the rotating action by hand to work free any unfused material. Although there is at least 0.7 mm of clearance between the adjacent surfaces of the outer circle, the features that must rotate freely have a large amount of surface area, and there is no easy path for the unfused material between the two surfaces to escape during bead blasting. The large surface areas of fused material around the clearance also traps heat and could cause the material in the clearance area to fuse. This example highlights how, in order to design a successful assembly with components that move freely, there must be a clear escape path for the unfused material if small clearance sizes are required. - Large surface area between faces with 0.711 mm clearance: 36 Chapter 6 Design and printing guidelines

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The inner circle with the HP logo will rotate freely after bead blasting although the clearance is quite low
(less than 0.7 mm). This is because there is a small surface area of “contact” between the two surfaces
that must freely move and an easy escape path for the unfused material to be removed during bead
blasting.
The outer circle contained in the white mesh cage typically requires more time bead blasting to remove
all unfused material and more time “working” the rotating action by hand to work free any unfused
material. Although there is at least 0.7 mm of clearance between the adjacent surfaces of the outer
circle, the features that must rotate freely have a large amount of surface area, and there is no easy
path for the unfused material between the two surfaces to escape during bead blasting. The large
surface areas of fused material around the clearance also traps heat and could cause the material in
the clearance area to fuse. This example highlights how, in order to design a successful assembly with
components that move freely, there must be a clear escape path for the unfused material if small
clearance sizes are required.
Large surface area between faces with 0.711 mm clearance:
36
Chapter 6
Design and printing guidelines