| 摘要 |
<p>The needle punching apparatus for making non-woven materials from a fiber lap, comprises a frame, a support (42) intended to carry a needle plate (1), and an actuating and guiding unit to activate the support so that the needles carry out a successive striking movement in a product. The actuating and guiding units comprises two actuating rods of which one part is connected with a respective crankshaft and other to the support of needle board by two actuating axes, and a unit for guiding a positioning pivot (49) linked to support according to a predetermined path. The needle punching apparatus for making non-woven materials from a fiber lap, comprises a frame, a support (42) intended to carry a needle plate (1), and an actuating and guiding unit to activate the support so that the needles carry out a successive striking movement in a product. The actuating and guiding units comprises two actuating rods of which one part is connected with a respective crankshaft and other to the support of needle board by two actuating axes, and a unit for guiding a positioning pivot (49) linked to support according to a predetermined path. The positioning pivot is confounded with the first actuating axis. The striking movement is a movement in closed loop in an ellipse or ovoid form, and a substantially straight movement. The actuating unit is intended to actuate the crankshafts in opposite direction with respect to the other. A unit for adjusting a phase lag comprises an outlet shaft connected to the first crankshaft, an inlet shaft connected to an outlet shaft motor, and an angular adjustable element to adjust a mutual angular setting of the inlet and outlet shafts. The unit for guiding the positioning pivot comprises a slide, and a deformable quadrilateral having an intermediary rod connected to the support by an articulation in the positioning pivot and two guiding rods articulated each of a part with a respective end of the intermediary rod and other part with the frame along an anchor axis. The deformable quadrilateral is constituted by Watt's and Tchebycheff's mechanisms. The guiding rods are placed opposed to the second actuating axis. A unit for regulating orientation of the predetermined path comprises a unit for regulating orientation of the slide, and a turning plate. The regulation unit comprises a unit for displacing the anchor axis with respect to the guiding rod. The anchoring axis displacing unit defines a path for the anchoring axis into an arc form of a circle, which is centered on the first actuating axis when the needle tips are at middle in the product. The anchoring axis displacing unit comprises a guiding slide, and a unit for blocking a position of anchoring axis in the slide. An INDEPENDENT CLAIM is included for a needle punching process.</p> |
