SLOT DIE HAVING INNER SPACE OF IRREGULAR CROSS SECTION FOR COATING OF ELECTRODE MIX

摘要

The present invention provides a slot die for electrode mixture coating to maintain the uniform pressure and flow velocity of an electrode mixture by varying vertical cross-sectional areas of a middle part and both end parts on a horizontal cross section inside the slot die. The slot die for electrode mixture coating comprises: a lower die having a horizontal cross section of which the outer circumferential side is composed of two long sides and two short sides facing each other separately, and including an inside space opened toward one surface comprising the long sides and short sides of the horizontal cross section; an upper die combined to face one open surface of the lower die; a tip portion protruding toward one long side on the horizontal cross section in the combination part between the upper die and the lower die, and including a slit which communicates with the inner space of the lower die; and a support coupled to the opposite surface of a surface which faces the upper die on the lower die, and including a flow passage which communicates with the inner space of the lower die. The inner space of the lower die has a vertical cross section in a form of a semicircle comprising a straight line and a curve, and has a concave shape from one open surface toward the support coupled to the lower die. The horizontal cross section of the inner space includes an outer circumferential side composed of: a first side and a second side located in parts which separately correspond to two long sides on the horizontal cross section of the lower die; and a third side and a fourth side located in parts which separately correspond to two short sides on the horizontal cross section of the lower die. The width of the middle part between the first side and the second side is longer than the length of the third side and the fourth side.