Circular knitting machine 2940A-B

fully-automaticcomputerizedindustrial

Product overview
Laboratory knitting machine for automatic production of tubular knitted fabric samples used to assess dyeing uniformity and dye affinity between different yarn bobbins. Suitable for synthetic, natural and regenerated fibres. The machine produces standard tubular samples for comparative dyeing tests and quality control.

Equipped with

• Auto Cop Changer (A.C.C.) available for 24 or 36 bobbins
• Electronic yarn feeder for continuous feeding
• Electronic pretension device with high accuracy
• Automatic bobbin-change marking device
• 36-yarn conveyor (standard on applicable versions)

Main technical features

• Ergonomic control panel with electronic counter, speed potentiometer and LED function indicators
• Adjustable cylinder rotation speed from 0 to 450 rpm
• High productivity: approximately 1000–1200 samples (2.5 cm) in ~10 hours
• Electronic counter to program sample length and number of samples
• Automatic cylinder lubrication system
• Fabric fineness adjustment mechanism
• Interchangeable cylinder (3 and 3/4" diameters) to accommodate a wide range of yarn counts
• Electronic automatic yarn pre-tensioner (0.1 cN accuracy) for constant tension during tests
• Electronic device that marks the knitted fabric at each bobbin change
• Auto Cop Changer fitted with built-in mechanical knotter
• Yarn feeder allows cop change while machine is running a test
• Yarn alignment device and knot detector

Versions / Models

• For 24 bobbins (code 2940B)
• For 36 bobbins (code 2940A)

Related equipment
GIOTTO HT 9000 is recommended to check and reveal dyeing uniformity. It can dye up to about 300 g of tubular knitted fabric samples and, with its built-in automatic dosing system, can wash, dye, rinse and, if required, soap the samples.

Technical data (indicative)
Code | n. of needles | Needle gauge | Indicative nominal count range
294E 1320 | 320 | 75 | Dtex 10-100
294E 1260 | 260 | 70 | Dtex 30-150
294E 1240 | 240 | 48 | Dtex 70-300
294E 1220 | 220 | 48 | Dtex 100-400
294E 1140 | 140 | 36 | Dtex 200-1000
294E 1112 | 112 | 24 | Dtex 400-2000
* Cylinder capacity should be confirmed by yarn testing, as cylinder selection depends on yarn count, composition and friction.
** Cylinders with other capacities are available on request.

Specifications

• Machine type: Laboratory knitting machine for automatic production of tubular knitted fabrics
• Application: Evaluation of dyeing uniformity and affinity between yarn bobbins
• Suitable yarns: synthetic, natural and regenerated fibres
• Available models: 2940A (36 bobbins), 2940B (24 bobbins)
• Auto Cop Changer (A.C.C.) with built-in mechanical knotter
• Electronic yarn feeder enabling bobbin change under test
• Electronic pre-tensioner with 0.1 cN accuracy
• Programmable electronic counter for sample length and quantity
• Speed range: 0–450 rpm
• Productivity: ~1000–1200 samples (2.5 cm) in about 10 hours
• Interchangeable cylinders and automatic lubrication
• Yarn alignment device and knot detector