Our hthp overflow dyeing machine for knitted fabric is a high-speed and low-liquor-ratio dyeing system specially optimized for knitted fabric production. Adopting an advanced full-liquid floating dyeing principle, the equipment allows knitted fabrics to travel freely inside the fully filled fabric guide tube without any wall friction or mechanical scraping. With a stable fabric running speed ranging from 300m/min to 500m/min, the machine effectively suppresses fuzzing and pilling defects, delivering cleaner and smoother fabric surfaces after dyeing.
To further optimize running stability and reduce abrasion, the hthp overflow dyeing machine for knitted fabric is equipped with a unique wave-shaped inner mesh structure. This specialized internal design minimizes fabric resistance during continuous circulation, enables much smoother fabric movement, and significantly lowers overall water consumption throughout the dyeing process. The system supports an ultra-low liquor ratio of 1:6 to 1:8, allowing flexible parameter adjustment according to different knitted fabric types and personalized process standards. It is a highly reliable, high-efficiency dyeing solution for modern high-quality knitwear production.
Core Operating Principles
Fabric Loading and Sealing
Knitted fabric is loaded into the dyeing vat in a rope-like form, and the machine is sealed to create a high-pressure environment.
01
Dye Liquor Circulation
A main pump drives the dye liquor through nozzles-using either overflow or jet action-to propel the fabric and ensure the liquor penetrates the fabric fibers.
02
Heating and Pressurization
A heating system (steam or electric) raises the dye liquor to the target temperature (e.g., 130°C); simultaneously, pressure increases automatically to suppress boiling and prevent uneven dyeing caused by air bubbles.
03
Bidirectional Circulation
Some models utilize a dual-flow design with alternating high and low circulation speeds to ensure uniform dye penetration and effectively eliminate longitudinal creases.
04
Cooling and Draining
Once dyeing is complete, the system rapidly cools via a heat exchanger; the fabric is then unloaded following multiple overflow rinses.
05
Feature
Designed exclusively for high-end textile processing, our professional knitted fabric dyeing machine adopts a premium upward-travel structure with a built-in cloth guide tube, delivering exceptional versatility for diverse knitting materials. It supports an ultra-wide fabric weight range from 50g/m to 800g/m, covering ultra-light thin knits, medium-weight fabrics and heavy-duty high-end knitted textiles to meet multi-scenario dyeing production requirements.
Equipped with upgraded low-pressure and high-flow nozzle systems, this advanced dyeing equipment realizes low-tension and high-fluid circulation operation. The optimized nozzle structure effectively lowers fabric running tension during the dyeing process, greatly reducing common textile defects such as excess hairiness and yarn cracking. Meanwhile, the high-flow water circulation promotes full fiber expansion, significantly enhancing dye penetration and overall dyeing finish quality.
To solve the industry pain points of fabric creases and edge curling, the machine is fitted with a professional fabric expansion device. During the buffer circulation process, the equipment enables proper and continuous fabric stretching and shape adjustment in the dye solution. This dynamic processing method prevents rigid fabric shaping and effectively avoids permanent creases and curling problems, achieving flat, neat and wrinkle-free fabric finishing results.
In terms of operational control, the dyeing system features high intelligence and simple operation. Adopting high-precision computer programming control, it supports fully automatic dosing and proportioning management, paired with high-efficiency water inlet and drainage systems to streamline the entire dyeing workflow. Users can additionally equip the machine with a preheating cylinder to recycle waste heat energy, effectively reducing energy consumption and long-term production costs.
The machine is integrated with high-performance variable frequency stepless speed regulation technology, realizing precise fabric speed control. It can freely match fabric running speed with customized process parameters in all speed ranges, eliminating fabric surface defects and color unevenness caused by unsynchronized speed and process cycles, ensuring stable and consistent high-standard dyeing results for every batch of fabrics.
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