Automatic package changer with 2 positions

Package changer model SE

Splicing in the SE

To secure a comprehensive quality evaluation of a yarn batch and high statistical significance of the test results, it is advisable to divide the total number of individual tests over as many packages as possible.

As a result, it is necessary to supply successive yarn ends to the testing equipment as rapidly as possible. To increase efficiencies, therefore, package change should also be automated for test instruments that have a fully automatic test sequence.

For this reason, modern automatic testing equipment for single- and twisted yarns, e.g. tensile-, twist- and yarn evenness testers, often incorporate an integrated package changer. Construction and functioning of such package changers are linked to the associated testing instruments and can only be used in conjunction with this equipment.

In addition to integrated package changers, there is also a need for autonomously operating package changers in textile testing, which can be used in conjunction with test instruments or other equipment that have no such integrated facility.

It is indeed advantageous if the changeover between packages can be carried out on the running yarn thus avoiding test stoppage, particularly for testing equipment with continuous yarn transport, like Textechno's dynamic thermal testers DYNAFIL ME or DYNAFIL C .

Under certain conditions, e.g. when only few packages are transported by trackled shuttles or during conveyor belt transport of single packages, at least a part of the efficiency of a multi-position package changer is lost. Similarly, this applies for tests carried out on individual packages over a very short period, e.g. 30 secs or less, where even large creels are fully tested within a few minutes. In such cases, operator presence is required at all times to ensure both the threading-in of yarn ends from new packages and the removal of examined packages. For this reason Textechno developed the SM package changer, which - like the SE Model - works on the principle of splicing a running yarn; it has, however, only two positions, one for the running yarn and the other for the next yarn end. The change is triggered either automatically via a signal released by the tester or manually by push button switch.

With this method, only the currently running yarn and the new yarn end are positioned between creel, shuttle etc. and package changer. The danger of yarn snagging or mistakes regarding the sequence of the packages is, therefore, negligible.

Another advantage of the SM package changer process is, that the next yarn can be fed simultaneously during the testing of the current yarn. As a result, and due to the "splicing of the running yarn" technology, test stoppage for each package change is unnecessary.

Technical data

Method:

Automatic package change by splicing of the running yarn for 2 yarns with manual feed for each of the following yarn ends

Yarn count range:

approx. 20 - 500 dtex and 500 - 3000 dtex (interchangeable)

Mains supply:

220 V, 50 (60) Hz

Compressed air supply:

5 bar

Dimensions:

Height 1100, Width 600, Depth 600 mm, Weight approx. 15 kg (SM)

 
The above technical contents can be subject to changes by Textechno.