Interlock fabric is a type of double-layered knitted fabric obtained by placing cylinder and cover needles perpendicularly and opposite each other, only in double-plate circular knitting machines.. Even if we stretch the interlock fabrics in the transverse direction, only the right loops are visible on both sides.
THE MAIN FEATURES OF INTERLOCK FABRICS ARE THE FOLLOWING:
1-It has the same appearance on the front and back, it is double-faced.
2-Pattern and surface design are limited.
3- Its front and back sides are smooth.
4-It has a dense structure.
5-It has a higher elasticity in the vertical direction than in the horizontal direction.
6-Dimensional stability and shape preservation feature is high
7-It is very heavy weight compared to other single yarn knitted fabrics.
Since there is air between the front and back surface, it has better thermal insulation properties. It keeps warmer than other single yarn knitted fabrics and it has a good moisture absorption feature due to the bulky structure of interlock knitted fabrics. It can also be used as a technical protective textile.
To determine whether a fabric is interlock or ribbed, stretch the fabric transversely and look at it, if the opposite loops are opposite each other, it is interlock. In simple terms, if it is full, it is an interlock. Ribada comes back to full, empty and empty.
In order to produce RR interlock knitting, the machine must be prepared. In order for the machine to be ready for knitting, needle selection, steel selection and may density adjustment, thread tension adjustment, machine speed adjustment and fabric drafting settings must be made.
There are two different needle groups in the circular interlock knitting machine, a cover needle and a cylinder needle. Cap needles of interlock machines are short and cylinder needles are longer than cap needles. In addition, the cap and cylinder needles are in two different foot lengths.
When needle arranging of interlock machines, two needles with different lengths of feet should be placed side by side. The same process applies to all cap and cylinder needles.
Steel selection and may frequency setting:
Knitting of RR interlock fabric takes place in two systems. The knitting pattern of the interlock knitting is two rows. In the first row of knitting, only short-footed needles loop, while long-footed needles do not move. In the second row, long-footed needles make loops. The steel system of the machine should also be adjusted according to this weave.
The steel system of interlock machines is dual. There is double steel in each system. This applies to both the cover and the cylinder.
The steel layout of the interlock machine should be arranged according to the knitting report given above. Looking at the report, it is seen that in the first system, short-footed needles make loops both on the cover and on the cylinder. In the second system, it is seen that long needles make loops on both sides. Accordingly, the steel layout of the machine should be as follows.
Production performance in interlock machines is different from other machines. Production in these machines is halved. For example, the 54 system rib machine knits 54 rows in one round in RR knitting, while the interlock machine knits 27 rows in one round in the same knitting.. In the production of RR normal interlock knits, the adjustment is made separately for the lower steel and the upper steel. This process is valid for both cover and cylinder steels. In normal intelok knitting, all may settings should be the same.
Thread tension adjustment:
For RR normal interlock production, the feeding of the yarns should be from the same pulley. Because the yarn consumption of each system is the same when we look at the knitting report. In addition, the yarn density of the sample fabric should be taken into account in the yarn tension adjustment made from the hoop. If you turn the pulley in the positive (+) direction, you will send more yarn and the knitting will be heavier. If we want to reduce the weight, the pulley belt should be tensioned by turning the pulley in the minus (-) direction.
Fabric draft setting:
The working system of circular interlock knitting machines is different from rib and single jersey circular knitting machines. In the interlock knitting machine, both systems complete a row. Therefore, the machine can knit half of the number of rows it should knit normally in one round. Fabric drafting adjustment should also be made taking this into consideration.
After the machine is ready, some sample fabric should be knitted. The yarn used for this knitted fabric should have the same properties as the sample fabric. After some fabric is knitted, the machine is stopped and a piece of sample is cut from it. After the cut sample is waited for a while, necessary controls are made.
We need to check whether the knitted sample fabric has the desired properties. Here, the knitted fabric sample is compared with the sample fabric, if any, and if there is no sample fabric, production controls are made by taking into account the desired features in the order form.
After making the desired settings on the machine, knitting the sample fabric and making the controls, the production of the fabric can be started. During the production of the fabric, care should be taken for possible errors. In addition, when arranging the bobbins on the creels, care should be taken that the yarns are in the same lot (lot) or bobbin according to the creel arrangement report.