Jumat, 20 Maret 2015

DRAW FRAME AUTOLEVELLER

Auto leveler is an additional device which is meant for correcting the linear density variations in the delivered sliver by changing either the main draft or break draft of the drafting system, according to the feed variation.
There are two types of Auto leveling systems. They are
-  Open loop system
-  closed loop system
Most of the draw frame auto levelers are open loop auto levelers.

In open loop auto levelers, sensing is done at the feeding end and the correction is done by changing either a break draft or main draft of the drafting system.
In closed loop system, sensing is at the delivery side and correction is done by changing either a break draft or main draft of the drafting system.
Most of the earlier card auto levelers are closed loop auto levelers. But the latest cards have sensing at the feed rollers and as well as at the delivery calendar rollers. We can say, both closed loop and open loop systems are being used in such auto levelers.
Open loop system is very effective, because the correction length in open loop system is many folds lower than closed loop system. But in case of closed loop system, it is confirmed that the delivered sliver is of required linear density. In case of open loop system, since the delivered material is not checked to know whether the correction has been done or not, Sliver monitor is fixed to confirm that the delivered sliver has the required linear density
Let us discuss about an auto leveler system which is being used in most successful draw frames like RSB-951, RSB-D-30 etc.
This system is an electronic leveling system. The major components in the system are
·         Scanning roller
·         signal converter
·         leveling CPU
·         servo drive(servo motor and servo leveler)
·         Differential gear box(Planetary gear box)
Function of the scanning roller is to measure the variation in the feed material. All slivers fed to the machine pass thro a pair of scanning rollers. One of the scanning rollers is moveable. These scanning rollers are loaded either by a spring loading system or a pneumatic loading system. Pneumatic loading is always better, because the pressure in kgs will be always same (consistent), irrespective of the sliver feed variation. But in the case of spring loaded, the pressure on scanning rollers may vary depending upon the feed variation.
The variations in sliver mass of the incoming slivers displace the scanning roller. The distance moved by the scanning is proportional to the sliver mass fed. This displacement of scanning rollers are transformed into voltage by a signal converter and is fed to an Electronic Leveling processor. With analogue system, electronic leveling processor is a servo amplifier, but in the case of digital system, it a CPU.
It is the Electronic Leveling processor which furnishes the correct target value to the servo drive. (Servo motor and servo leveler).
Delivery speed of the machine and electric signal values arrived at by the slivers fed are the two important signals for the correction.
Servo drive takes the information and is converted in such a way that servomotor RPM and direction is decided for appropriate correction.
Planetary gearing (Differential gearing) with its controlled output speed drives the middle and back roller. I.e. Sliver entry of the drafting system
Because the servo motor RPM and direction varies according to the feed variation and the servo motor and servo leveler generates a control speed of the planetary gearing, the required change in main draft is accomplished, compensating for the weight variation of the sliver fed.
·         If the slivers fed are too heavy, the entry speed is reduced i.e. draft increased
·         If the slivers fed are too light, the entry speed is increased i.e. draft reduced
Delivery speed (the front roller speed) remains constant and hence the production remains constant.

Jumat, 08 Maret 2013

80% Pakaian Bermerek Kelas Dunia Diproduksi di Indonesia



Jakarta - Asosiasi Pertekstilan Indonesia (API) mengklaim 80% produk pakaian bermerek global telah dibuat di dalam negeri. Hal ini sejatinya menunjukan industri tekstil dan produk tekstil (TPT) Indonesia diakui dunia.

Hal ini diungkapkan oleh Ketua Umum APi Ade Sudrajat kepada detikFinance, Jumat (8/3/2013).

"Mark and Spencer, Mango, Zara, itu sebagian besar dibuat di Indonesia, bahkan sekitar 80% merek dunia dibuat di Indonesia. Merek China ada, merek Korea ada," ungkap Ade.

Ia mencontohkan, produsen pakaian di Indonesia tersebut banyak menerima pesanan dari para pemegang merek terkenal di dunia. Misalnya produk Zara pun memproduksi pakaiannya di Kamboja, China, dan negara lainnya selain Indonesia.

"Pemegang merek-nya asalnya dari Spanyol, jadi dia sistem-nya OEM (original equipment manufacturer) kalau di kita," ujar Ade.

Saat ini, lanjut Ade, ada 3.000 perusahaan tekstil dan pakaian jadi di Indonesia. Sebanyak 50% diantaranya berorientasi pada ekspor, sebagian besar dari perusahaan tersebut memproduksi merek-merek ternama.

"Banyak pusat produksi di kita, di Bandung, Bekasi, Bogor, banyak di kita. Ekspor kita tahun lalu sampai US$ 13 miliar," pungkasnya.

Seperti diketahui, produk pakaian Zara sebagian dibuat di pabrik tekstil yang berlokasi di Desa Jetis, Sukoharjo, Jawa Tengah. Pakaian Zara dibuat oleh PT. Sri Rejeki Isman (Sritex) yang dimiliki oleh HM. Lukminto.

Zulfi Suhendra - detikfinance

Pakaian Zara Ternyata Sebagian Made in Sukoharjo



Jakarta - Tahukah anda ternyata produk pakaian Zara sebagian dibuat di pabrik tekstil yang berlokasi di Desa Jetis, Sukoharjo, Jawa Tengah. Pakaian Zara dibuat oleh PT. Sri Rejeki Isman (Sritex) yang dimiliki oleh HM. Lukminto.

Hal in disampaikan oleh Juru Bicara Sritex Ai Syarif kepadadetikFinance, Jumat (8/3/2013)

"Sritex juga memproduksi pakaian Zara, selama ini orang menganggap itu buatan luar, padahal sebagian itu dibuat di Sritex," kata Ai.

Ia menuturkan sejak 3 tahun lalu pihak prinsipal Zara di Spanyol mempercayakan produksi pakaian Zara di Sukoharjo. Produk Zara yang dibuat di Sritex jenis pakaian blus maupun kemeja, bahkan kancingnya pun dibuat di pabrik tersebut.

Kasasi Ditolak, Hak Cipta Kain Militer NATO Milik Sritex


Gedung Mahkamah Agung (ari saputra/detikcom)
Jakarta - Sengketa kain militer yang dipakai militer negara anggota North Atlantic Treaty Organization (NATO) terus berlanjut. Kali ini seteru digelar di Mahkamah Agung (MA) untuk memperebutkan hak cipta kain yang diproduksi di Sukoharjo, Jawa Tengah, ini.

Seteru dua perusahaan itu PT Sri Rejeki Isman (Sritex) dengan PT Delta Merlin Dunia Textile (Duniatex). Duniatex beberapa waktu lalu menggugat Sritex terkait hak cipta kain yang dipakai militer di berbagai dunia itu ke Pengadilan Negeri Jakarta Pusat (PN Jakpus).

Pada 1 Oktober 2012, PN Jakpus menolak gugatan pembatalan hak cipta yang diajukan pemilik Duniatex, Jau Tau Kwan. Tidak puas, Duniatex mengajukan kasasi tetapi hasilnya kandas.