On the ITMA99 card, the company has produced a DK903IDF combination, which has caused a lot of repercussions. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit. During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine.
Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame. The Idf is at the front of the dk903 card.
It consists of a stretcher and an automatic sprocket bag placed over the sprocket sprocket. Here, the idf is also considered as a pre-drafting device for the card because: (1) the idf processes the sliver directly processed by the card; (2) the idf is placed between the sliver and the card, And idf has no merging function, so it can be regarded as a pre-drafting device before the card in a general sense. 1. Main points of IDF 1. Draft form and related components. The drafting mechanism type is three-up and three-down, which is continuous two-zone drafting. The rear drafting area is the elastic drafting area, and the front drafting area is the main treatment area. In the drafting area, the working elements used in the drawing frame are all used by the HSR-1000 high-efficiency drawing frame. The pressure is pneumatically designed and equipped with a high-precision self-leveling device to ensure uniform production. The high-efficiency suction system can keep all these parts clean, and its output speed can reach 500m/min.
2. The drafting ratio varies greatly, and 3 times is used. Generally, the pre-drafting system is installed on the carding machine. Most of the designs use Lishen with a cost of no more than 2 times. IDF uses 2-3 times of drafting. With its scientific theoretical basis, the relevant educational experts have studied the relationship between the total drafting movement ratio of the sliver and the strength of the sliver and the elongation of the fiber cells. Fiber elongation is more appropriate. In addition, according to the formula of the straightness of the hook before and after the continuous double-zone drafting training of the enterprise, our teachers can know for themselves that the IDF adopts a multiple of 3 times or less, which is beneficial to the straightening process of the front and rear hooks. Second, the use of IDF effect (1) As long as the quality of the yarn is guaranteed, one drawing can be omitted.
The following two sets of experiments illustrate the effectiveness of idf. Test First Class 1 uses the traditional process, namely DK903 - two parallel strips - air spinning. Process 2 adopts the traditional process design process, namely DK903 ten lDF---one draw frame---air-flow spinning processing yarn count is Ne30, and its spinning technology quality is shown in the table below.
Test 2 Process 1 DK803---Two drawing frames---Roving---Spinning process 2 DK903+IDF---One draw frame---One roving---Spinning yarn yarn count is Ne6. The quality of its spinning technology See table below. (2) We save a coiler and a sliver path output control device, saving 60% of the floor space. (3) Cotton has certain advantages after being processed and reused.
As we all know, going back to the embossed splices cannot withstand 5-8 times stretching, because the fibers can get so much entanglement, the uniformity is poor, and thus cannot be processed back to the tampon machine. Generally, the back sliver is usually spun in the rotor of the person. The yarn feeds the flower directly, the air flow can be improved if there is a sliver basis weight definition due to the low draw ratio of the IDF IDF yarn quality, it can be well suited for the processing of the back spend sliver. (4) It is more favorable in terms of capital, energy, repair, maintenance and operation, which is conducive to the continuous reduction of production and management costs of enterprises, and its production costs can be reduced by at least 10%. (5) Disadvantage: The disadvantage of IDF is that it does not coalesce the sliver, and the drawn 3 ratio further limits the fiber straightness.