| 摘要 |
A packerhead assembly for use in making concrete pipes. The packerhead assembly includes a rollerplate with rollers mounted thereto, and a long segmented longbottom assembly comprised of two substantially identical troweling members, one of which is inverted with respect to the other. The two troweling members combine to form an elongated troweling surface which allows the use of concrete mixes having high fluidity. The longbottom assembly also utilizes removable wear bands which limit the ingress of concrete material to the interior of the longbottom assembly. The wear bands are of particular value when utilizing highly fluid concrete mixes.
|
