EXTRUDER Russian patent published in 2007 - IPC B28B3/20 

FIELD: construction.

SUBSTANCE: extruder comprises hopper for concrete and working member mounted on the load-bearing frame. The working member is made of at least one member that has housing and hollow generator, hollow blade screw, and outer and inner spindles mounted coaxially to the guiding rod. The outer spindle is provided with drive for its rotation. The inner spindle is mounted for permitting axial movement and is connected with the device for transmitting axial vibration to it. The outer spindle is connected with the inner one through an arrangement that transmits rotation from the outer spindle to the inner spindle and provide free movement of the spindle one with respect to the other in the axial direction. The inner spindle is connected with the screw, and the screw is pivotally connected with the hollow generator, which can move with respect to the housing of the working member in the direction of the longitudinal axis. According to the second version, the inner spindle is provide with a drive for setting the spindle in rotation, and outer spindle can move in the axial direction and is connected with the device for transmitting axial vibration to it. The outer spindle is connected with the inner spindle through an arrangement that transmits rotation from the inner spindle to the outer spindle and allows the spindles to move freely in the axial direction one with respect to the other. The outer spindle is connected with the screw, and the screw is pivotally connected with the hollow generator that can move with respect to the housing of the working member in the direction of its longitudinal axis.

EFFECT: expanded functional capabilities.

14 cl, 8 dwg