How To Achieve 18mm Ultra-thick Stitching At A High Speed Of 1900 RPM?

In industrial sewing, particularly on production lines for heavy-duty packaging products like FIBC ton bags and container bags, efficiency and quality are often difficult to achieve simultaneously: Pursuing sewing speed risks skipped stitches, broken needles, or weak seams; prioritizing seam strength and thickness frequently comes at the expense of production speed. Today, this industry challenge is being overcome by a revolutionary machine-the GK35-1U single-needle top-and-bottom feed large bag sewing machine. With its high speed of 1900 RPM and exceptional 18mm thick-seam capability, it truly achieves the perfect blend of "speed and strength."

 

1. Why are "high speed" and "thick seams" equally important?

 

For global ton bag manufacturers, production line output capacity directly impacts market competitiveness. Traditional chain stitch sewing machines often require reduced speeds when handling multi-layer PP/PE woven fabrics to ensure stitching quality, creating a production bottleneck. The GK35-1U elevates maximum sewing speed to 1900 RPM, enabling more bag mouth stitching operations within the same production timeframe and significantly boosting overall output.

 

Simultaneously, its maximum 18mm seam thickness capability ensures the machine effortlessly handles extreme material stacking scenarios, such as reinforced bottom stitching on ton bags or overlapping seams on multi-layer slings. This capability makes the GK35-1U suitable not only for standard large bags but also for various heavy-duty and special-specification packaging sewing requirements.

 

2. Core Technology: Synchronized Top-Bottom Feed System

 

The key to achieving high-speed thick-seam sewing lies in the GK35-1U's advanced synchronized top-bottom feed system. Unlike traditional models that rely solely on lower feed dogs to advance fabric, the GK35-1U's feed mechanism applies precise, uniform pressure simultaneously from both the presser foot (top) and feed dogs (bottom).

 

• Eliminate fabric slippage: Coordinated upper and lower feed mechanisms ensure multi-layer heavy fabrics advance synchronously during sewing, completely preventing uneven stitching, wrinkling, or distortion caused by fabric misalignment.
• Maintain beautiful, secure stitches: Even when sewing the thickest materials at maximum speed, the system guarantees consistent stitch length (adjustable 9-15mm) for every stitch, producing a strong and attractive 401 chain stitch.
• Protecting Thread Strength: Smooth feeding reduces abnormal tension on the thread. Combined with the UOX1975 series high-strength machine needles, this significantly lowers thread breakage and needle breakage rates during high-speed operation.

 

3. Stable and Efficient, Beyond Specifications

 

The design philosophy of the GK35-1U permeates its entire product lifecycle, aiming to provide users with enduring and reliable productivity:

Easy Maintenance, Controllable Costs: Features a manual oil cup lubrication system for simple and intuitive upkeep. Core components share high compatibility with the classic GK35-2C series, substantially lowering spare part procurement costs and inventory pressure while ensuring convenient and economical after-sales service.

 

Targeted design addresses industry-specific challenges: The standard-equipped filter cord guide effectively seals the needle eye during sewing, preventing leakage of powdered or granular contents-an essential feature for packaging in chemical, mineral, and similar industries.

 

Wide-ranging application adaptability: The GK35-1U excels not only in sewing PP/PE woven bags and FIBC ton bags but also demonstrates robust process adaptability for stitching heavy-duty material bags and bulk bags made from various canvas and cotton fabrics.

 

 

The GK35-1U single-needle top-and-bottom feed large bag sewing machine is more than just a machine with outstanding specifications-it delivers a systematic solution addressing the core demands of the large bag manufacturing industry. It conquers production efficiency challenges with a high speed of 1900 RPM while ensuring the reliability and strength of the final product through its 18mm seam thickness capability. For packaging manufacturers pursuing breakthroughs in production capacity and quality upgrades, the GK35-1U is undoubtedly a strategic piece of equipment that can immediately enhance the competitiveness of production lines.

 

To contact us:

WhatsApp/WeChat: 0086 13991289750/0086 13891858261

Email: sales@chinapackstar.com