Machine basic structure

Machine compose of three faction parts

·Motive power parts

Contain motor ,spindle speed exchange belt pulley, electric control box ,operating element, displayer.

·Two-for-One Twisting parts

The machine two sides working structure is symmetrical ,use mental plate structure ,each section is compose of several Two-for-One Twisting structure units .

·Driving part

Machine power passed to spindles and driving box via apron belt. ,driving box drive winding system,  over-feed roll,  and lifting device, etc

3.5  Structure of Two-for-One Twist unit

3.5-1 spindle brake apparatus

It stops the spindle to rotate by using the combination of separate spindle and brake slice. When braking ,separate the spindle from the joint of apron belt by hand, make the spindle away from apron belt, prolong the lifetime of the belt and spindle plate  ,meanwhile reduce the power consumption.

3.5-2 Two-for-One Twister spindle

a)Threading form: thread manually

· Fixed pot,for putting in feeding bobbin

·Twisting plate for yarn storing and guiding: storage district of twisting plate ,can be form  proper yarn storage to balance the change of tension in unwinding process

Note: Forbid spindle running after discharge the pot, it will shorten the lifetime of pot and pollute the yarn if igore this rule.

·Tension device: compose of tension tube and tension steel ball. Yarn tension can be adjust by tension device , meanwhile control the yarn storage on the twist plate. There are four kinds of steel ball.,its diameter isφ6.35,φ7.1, φ7.9,φ9.5;Use proper steel ball one or couple according different sorts of yarn.( the steel ball and number for using to adjust the tension,should according practical case, and comfirm after testing by engineer of end-user)

3.5-3 Faller wire

Faller wire monitoring twisting process , when yarn braked and feed bobbin used up, faller wire down and stop yarn releasing.

3.5-4 Take-up section

a)Two guide wheel for each spindle ,can adjust wrap angle of the yarn which on over -feed roll, Wrop angle is one of pricinple element for controlling take-up tension, affect take-up density.

b)Over-feed roll :via change speed of over-feed roll and wrap angle of yarn on over-feed roll , can decrease the tension of air ring to needed winding tension. Overfeed percentage (circle speed rate of overfeed roll and friction roller) set for 167% and 141%

c)Take-up (contain traversing yarn): the conpound of friction roller turnning and yarn guide crosswise ,to finished the yarn cross winding on the bobbin. To change the transmission ratio from  friction roller to traverse cam wheel, meanwhile changed the wrap angle, range of variation is 14º47',16º36',18º41',21º07', four grades in total.

The ralation of yarn take-up speed, spindle speed and yarn twist is as follows:

           Spindle speed(r/min)× 2

Twist(t/m)= ---------------------

           Take-up speed(m/mim)