| 摘要 |
<p>Apparatus and method for stuffer box crimping yarn is disclosed in which continuous filament drawn yarn having a thermoplastic component and varying in denier along its length is treated in the same crimping area and where that portion of the yarn of higher denier is texturized to a lesser extent than that portion of the yarn of lower denier. The apparatus for carrying out the method provides a crimp site and a very short plug guiding area which establishes the lateral width of the plug. A pair of pressure shoes are oppositely disposed on either side of the plug of crimped yarn as it leaves the guiding area. The shoes are spaced apart at a slightly greater distance than the width of the guiding area to provide voids along the plug sides thereby reducing if not eliminating back pressure in the plug due to lateral plug contact above the guiding area and are pivoted adjacent the guiding area, and apply a uniform pressure on opposite sides of the plug downstream of the guiding area where they converge against the plug. Means for relaxing the plug of yarn fore and aft of its axis are provided intermediate the crimping site and the downstream ends of the pressure shoes. A gathering area downstream of the pressure ends of the shoes is designed to have little or no effect upon the yarn entering and leaving it, and in this respect, it provides further means for yarn plug relaxation.</p> |
