(2) Basic knowledge of knitting-know the hand-operated […]
(2) Basic knowledge of knitting-know the hand-operated flat knitting machine
Five, the knitting principle of flat knitting machine
1. The function of the triangle: the needle triangle is used for the needle, the heart triangle is used for the thimble, the herringbone triangle is used for guiding and pressing the needle, the big triangle is bending the yarn and pressing the needle, setting the loop size and can brake the tuck.
2. Needle starting route: After the knitting needle enters the working area, the machine head runs on the guide rail. It moves from right to left and then from left to right. The knitting needle forms a regular needle route along the triangular needle surface. . When the machine head moves, the knitting needle first hits the needle cam, it rises along the needle cam surface, and then rises along the heart triangle to pass through its apex, and then under the control of the herringbone triangle, the knitting needle is forced to guide and press the needle along the herringbone triangle. The noodles descend, and then the noodles continue to descend along the big triangle. Finally, they pass by the bottom of the big triangle and run out of the acupuncture path. Its needle movement is formed by alternating cycles.
Sixth, the fabric density is tight
To know the density of tightness, you must first understand the following three points:
1. Recognize the verbal, verbal, and verbal.
2. Recognize the depth of acupuncture.
3. The role and function of the big triangle.
The reference point for adjusting the density is the head and mouth line, and the needle can form a circle below the head and mouth line. The so-called needle depth is controlled by four large triangles.
Seven, the adjustment of the needle bed
Before placing the needle bed on the top surface of the machine base, the back of the needle bed and the plane of the machine base head should be wiped clean. Observe whether the head of the needle bed adjusting screw on the beam behind the machine base is in good contact with the back of the needle bed. Pay attention to the staggered arrangement of knitting needles on the front and back needle beds.
8. Adjusting the surface of the needle bed, due to the influence of various factors such as yarn thickness, pulling gravity, yarn tension, needle hook diameter, etc., the gap between the front and rear needle beds also increases and decreases at random.
The gap value (board gap value) between the front and rear needle beds of each machine number is shown in the table:
The best range of machine number seam 4 6.00-6.30 9 2.90-3.10 5 4.90-5.10 10 2.80-3.00 6 4.20-4.40 10 2.80-3.00 6 4.20-4.40 11 2.60-2.30-2.80 7 3.60 11. 13 2.10-2.30 @ C
However, in the actual school bus and adjusting the needle bed board seam, it is necessary to refer to the value in the table according to the production variety structure, which can be appropriately enlarged or reduced to facilitate knitting. The following points should be paid attention to when installing and adjusting the needle bed surface:
1. Select the appropriate value of the seam according to the range of the seam value of each machine number.
2. After the front and rear needle beds are installed, check whether the seam of the board is in a balanced state, that is, there must be no height after the front and rear needle beds are placed.
3. The seam size at both ends of the needle bed must be the same.
Nine, adjustment of triangle parts
The triangular component is assembled by installing each woven cam on a base plate. First, make a comprehensive inspection of the bottom plate to check whether the screw holes of the bottom plate are complete, the smoothness and matching accuracy of the slot holes are good, and the oil dirt, iron filings, etc. on both sides of the bottom plate and the slots are wiped clean, and check whether the circled triangle is active , There must be no sluggishness and shaking.
10. Yarn guide
The correctness of the installation of the yarn guide components is concentrated on the yarn feeding state after the yarn feeding bobbin is installed. Since the yarn feeding bobbin is a vulnerable part, it is often required to be ground or replaced. In addition, the bobbin screw is easy to loosen, so installing and adjusting the yarn feeding bobbin is still a regular maintenance work. According to the requirements of the yarn feeding needle angle and the yarn feeding loop angle, the installation of the bobbin should pay attention to three aspects: height, front and rear, left and right. When installing, pay attention to the installation from high to low, and do not damage the pin tongue. Generally, push up about 4 to 5 knitting needles on the front and back needle beds, in a cross state (97°), push the machine head to the corresponding position, install the shuttle, and observe whether the position of the shuttle mouth is at the intersection of the knitting needles In the middle, and whether the height is appropriate, make the shuttle mouth about 0.5 to 1.5mm away from the latch needle, and it is advisable not to touch the latch needle. Then observe whether the position of the bobbin in the needle crossing of the entire needle bed is consistent. If there is any deviation or jumping phenomenon, it should be corrected. At the same time, pay attention to adjust the feeding depth of the bobbin (commonly known as the number of needles), and the left and right back and forth should be consistent.
Recommended Reading : Brief introduction of hand-cranked flat knitting machine (1)