V Bed or Flat Bed Knitting Machine

The V-bed knitting machine is a popular type of knitting machine used in the textile industry. There are two main types of this machine: the V-bed rib machine and the flat bed purl machine.

  1. V-Bed Rib Machine: This machine has two rib gates, and its needle beds are positioned diagonally, approaching each other like a “V” shape. It uses a special kind of needle called a double-headed latch needle, which can be transferred between the two needle beds to create different stitches.
  2. Flat Bed Purl Machine: The flat bed purl machine has horizontal needle beds, unlike the V-bed rib machine. It also uses the same double-headed latch needles that can move between the two needle beds to create various knitted patterns.

Both of these V-bed knitting machines are versatile and can produce a wide range of knitted fabrics and designs. They are widely used in the textile industry to make various clothing items and other knitted products.

The main parts of a V-bed knitting machine are as follows:

  1. Yarn Package: The yarn package holds the yarn supply and feeds it to the knitting machine during the knitting process.
  2. Front Needle Bed: The front needle bed is one of the two diagonally approaching needle beds where the knitting process takes place.
  3. Yarn Guide: The yarn guide directs the yarn to the needles for proper knitting.
  4. Needle Spring: The needle spring helps control the movement of the needles during the knitting process.
  5. Tension Spring: The tension spring ensures proper tension is maintained on the yarn during knitting.
  6. Fabric: The fabric is the resulting knitted material that is produced by the machine.
  7. Cymbal Tension: The cymbal tension system controls and adjusts the yarn tension during knitting.
  8. Dead Weightening System: The dead weightening system helps maintain appropriate tension on the fabric being knitted.
  9. Yarn Take-up: The yarn take-up mechanism collects and winds the knitted fabric into a roll or spool.
  10. Latch Needle: The latch needle is a special type of needle used in V-bed knitting machines to form stitches.
  11. Fabric Comb: The fabric comb helps keep the knitted fabric in alignment and prevents tangles.
  12. Yarn Carrier: The yarn carrier holds the yarn and moves it across the needle beds during knitting.
  13. Back Needle Bed: The back needle bed is the second of the two diagonally approaching needle beds where the knitting process takes place.

A (L) – Raising cam (left)
B (R) – Raising cam (right)
C – Tuck cam (left & right)
D (L) – stitch cam (left)
D (R) – stitch cam (right)
E – Guard cam

The V-bed hand flat machine uses a cam system to guide the needles and create knitting patterns. There are three types of cams involved: raising cams (R), cardigan cams (C), and stitch cams (S). Each needle bed has two sets of these cams.

Here’s how the cam system works:

  • When the carriage moves from left to right, the needle butts enter the traversing cam system from the right. On the other hand, when the carriage moves from right to left, the needle butts enter from the left.
  • Each needle bed has two raising cams (R) that raise the needles to the required height for knitting.
  • Additionally, there are two cardigan cams (C) and two stitch cams (S) for each needle bed, forming a knitting system.
  • A single system machine knits one course of rib in one traverse, while a double system machine knits two courses of rib per traverse.
  • The set of cams in one bed is sometimes referred to as a “lock.”

The knitting action of the V-bed hand flat machine:

  1. Rest Position: When the knitting machine is not in use, the needles are positioned with their heads level with the edge of the knock-over bits. The trailing stitch cams are lowered, and the leading stitch cams are lifted to an inactive position. This ensures that the needles are not unnecessarily lowered and prevents strain on the old loops before starting the knitting process.
  2. Clearing: As the knitting action begins, the needle butts are lifted when they touch the leading edge of cams R. This raises the needles to the right height for “tucking in the hook.” The undersurface of cams S acts as guard cams to protect the needles during this process. The needles are lifted to full clearing height as they pass over the top of cardigan cams C.
  3. Yarn Feeding: As the needles move downward, the yarn is fed to create new loops. A guard cam (G) controls this process, ensuring the correct loop length is drawn by the latch needle as it moves along the stitch cam.
  4. Knocking Over: To achieve synchronized knocking over of both needle beds simultaneously, the front system’s stitch cam S is set lower than the auxiliary stitch cam AS. This renders the auxiliary stitch cam ineffective, resulting in the desired knocking-over action during the knitting process.

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