Patent ID: 8641396

Claim:
A spiral distributor for a die head of a foil extrusion line with a central axis, which runs in the direction of the flow, and with a distributor flow direction which runs parallel to the central axis in the case of an axial spiral distributor, radially in the case of a radial spiral distributor and in the case of a conical spiral distributor so that it is projectable onto the axis, a gusset area having pre-distributor apertures all around it in beginnings of spiral channels, and the spiral channels running at an angle relative to the distributor flow direction, a first spiral channel starting at a beginning, passing a second directly adjacent spiral channel downstream at its beginning after an initial section and running on downstream of its initial section and of its further section in its further section as a continuous spiral channel, so that during operation of the die head melt issuing from the second spiral channel overflows an overflow bar in the distributor flow direction toward the first spiral channel lying downstream, wherein the spiral distributor has an overflow facilitator for the melt at the beginning, in the initial section and/or in an area where the initial section passes into the further section of a spiral channel, wherein a small-depth area of at least one spiral channel of the spiral channels comprises the beginning of the at least one spiral channel, comprises the initial section of the at least one spiral channel, ends at a beginning of the area where the initial section of the at least one spiral channel passes into the further section of the at least one spiral channel, and extends in a direction of rotation of the at least one spiral channel, wherein the depth of the small-depth area is smaller than each of the depths of remaining areas of the at least one spiral channel, and wherein the depth of the small-depth area is either constant or decreases.