  Antikink-kink ( $\bar{\rm K} $$ {\rm K}$) collisions in the $\phi^6$ model
exhibit resonant scattering although the $\phi^6$ kinks do not support any
bound states to which energy could be transferred. In Phys. Rev. Lett. 107
(2011) 091602 it was conjectured that, instead, energy is transferred to a
collective bound mode of the full $\bar{\rm K} $$ {\rm K}$ configuration. Here
we present further strong evidence for this conjecture. Further, we construct a
collective coordinate model (CCM) for $\bar{\rm K} $$ {\rm K}$ scattering based
on this collective bound mode trapped between the $\bar{\rm K} $$ {\rm K}$ pair
which allows us to reproduce the full dynamics of $\bar{\rm K} $$ {\rm K}$
scattering with striking accuracy. We also study kink-antikink (${\rm K} $$
\bar{\rm K}$) scattering and its description by a CCM. In this case a
significant role of radiation is discovered.
