#SKS-717: 3-Ply Laboratory Yarn Doubling & Twisting Machine
Laboratory Yarn Doubling & Twisting Machine
English Name: Laboratory Yarn Doubling & Twisting Machine
Alternative Name: 3-Yarn Combining & Twisting Laboratory Machine
Product Descriptio
- Machine Introduction
The 3-Ply Laboratory Yarn Doubling & Twisting Machine is a compact professional machine specially designed for yarn research and development, laboratory testing, product development, and customer sampling.
The machine integrates two conventional processes—Yarn Doubling / Combining and Yarn Twisting—into a single unit. Three single yarns, either of the same or different specifications, are fed simultaneously, combined, and then twisted to produce a stable and uniform 3-ply twisted yarn.
The machine is equipped with a Japanese Mitsubishi variable-frequency drive (VFD) control system. The doubling and twisting sections can be independently controlled, allowing operators to flexibly adjust the operating parameters according to different yarn materials, yarn counts, twist requirements, and product specifications.
As this machine is primarily designed for laboratory development and rapid sampling, its key advantages are flexibility, easy parameter adjustment, fast sample development, and small-batch testing rather than high-volume industrial production.
- Working Principle
Basic Production Process
3 Single Yarns → Individual Yarn Feeding → Tension Control → Yarn Combining → Doubling → Twisting → Winding → Finished 3-Ply Yarn
Detailed Process
Three yarn packages are fed independently
↓
Three yarns enter the guiding system simultaneously
↓
Individual yarn tension is controlled
↓
Three yarns are combined together
↓
A 3-yarn bundle is formed
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The combined yarn enters the twisting system
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Twist level and twist direction are controlled
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Finished 3-ply twisted yarn is produced
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The finished yarn is wound onto a sample package
Therefore, this machine is not simply a yarn doubling machine or a yarn twisting machine. It integrates:
Yarn Doubling + Yarn Twisting + Winding
into one compact laboratory machine.
- Main Features of 3-Ply Yarn Doubling & Twisting
3.1 Simultaneous Processing of Three Yarns
The standard configuration allows three yarns to be fed simultaneously, combining three single yarns into one 3-ply yarn.
Depending on the development requirements, the three yarns can be:
- Same yarn count
- Different yarn counts
- Same raw material
- Different raw materials
- Different colors
- Different fiber compositions
This provides excellent flexibility for developing and testing new yarn structures.
3.2 Integrated Doubling and Twisting
A conventional production process may require:
Yarn Doubling Machine → Twisting Machine → Finished Sample
With this integrated laboratory machine, the process can be completed continuously:
Doubling → Twisting → Winding
This reduces intermediate handling, simplifies the sampling process, and improves laboratory development efficiency.
3.3 Independent Mitsubishi VFD Control
The machine is equipped with a Japanese Mitsubishi variable-frequency drive control system.
The relevant drives for the doubling and twisting sections can be independently adjusted, allowing operators to control:
- Doubling speed
- Twisting speed
- Winding speed
- Speed ratio
- Yarn tension coordination
- Processing parameters
This provides greater flexibility when developing different yarn constructions.
- 1:3 Speed Ratio Design
One of the important features of this machine is that the doubling speed and twisting speed can be adjusted according to the required process conditions.
According to the machine design:
Doubling section: relatively fast
Twisting section: relatively slow
The speed relationship between the two sections can therefore be adjusted according to different laboratory requirements, for example:
1:3 Speed Ratio
With independent VFD control, the operator can optimize the operating parameters for different yarn types and product requirements.
This is particularly important in laboratory development because different raw materials, yarn counts, twist levels, and yarn structures may require different speed-matching conditions between the doubling and twisting processes.
- Main Applications & Functions
The machine is mainly designed for the following laboratory applications:
5.1 New Yarn Development
Suitable for developing:
- 3-ply yarns
- Combined yarns
- Composite yarns
- Special-structure yarns
- Functional yarns
5.2 Different Yarn Count Combination Testing
The machine can be used to test different yarn-count combinations.
For example:
Ne 20 + Ne 20 + Ne 20
Different yarn counts can also be combined according to customer requirements and product development objectives.
5.3 Different Raw Material Combination Testing
Depending on the actual machine configuration and yarn suitability, the machine can be used for testing:
- Cotton yarn
- Polyester yarn
- Nylon yarn
- Viscose yarn
- Acrylic yarn
- Blended yarn
- Filament yarn
- Spun yarn
as well as other suitable yarn types.
5.4 S-Twist / Z-Twist Testing
The machine can be used to develop yarns with different twist directions:
S-Twist
or
Z-Twist
This allows customers to evaluate the influence of twist direction on yarn performance and final fabric appearance.
5.5 Twist Level Testing
By adjusting the twisting speed and other relevant process parameters, different twist levels can be developed and evaluated.
This is useful for determining the optimum twist specification before industrial production.
5.6 Yarn Tension Testing
Different yarn materials have different physical characteristics.
The machine can therefore be used for testing different yarn tension conditions and studying their influence on:
- Yarn uniformity
- Yarn appearance
- Yarn stability
- Twist quality
- Winding performance
- Advantages for Laboratory R&D
Compared with large industrial production machines, the greatest advantage of this machine is not high production capacity, but rather:
Flexibility + Speed + Economy + Easy R&D
Customers can perform small-batch sample production directly in the laboratory without immediately starting a full-scale industrial production line.
Typical Development Process:
Customer proposes a new yarn requirement
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Use the laboratory machine to develop a 3-ply yarn
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Adjust doubling speed
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Adjust twisting speed
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Adjust twist level
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Adjust yarn tension
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Produce the sample
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Customer evaluates the sample
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Finalize the yarn specification
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Purchase industrial production equipment
This is one of the most important commercial values of the machine.
- Applications
The machine is particularly suitable for:
- Textile mills
- Yarn manufacturers
- Wool spinning mills
- Knitting factories
- Garment manufacturers with R&D departments
- Textile universities
- Textile research institutes
- Fiber R&D centers
- Yarn trading companies
- Textile machinery technology centers
- New product development laboratories
It is especially suitable for companies that continuously develop:
New Yarns + New Materials + New Products
- Key Product Advantages
- Integrated Doubling & Twisting
Two major yarn processes are integrated into one machine, reducing intermediate handling and simplifying laboratory operations.
- Standard 3-Yarn Configuration
Three single yarns can be fed simultaneously for 3-ply yarn development.
- Japanese Mitsubishi VFD Control
Equipped with a reliable Mitsubishi variable-frequency drive system for convenient and precise speed adjustment.
- Independent Speed Control
The doubling and twisting sections can be independently controlled according to process requirements.
- Flexible Speed Ratio
The speed relationship between the doubling and twisting sections can be adjusted according to different yarn characteristics, including ratios such as 1:3.
- Rapid Sample Development
Small-batch samples can be produced without using large industrial production equipment.
- Reduced R&D Cost
Helps reduce raw-material waste and equipment adjustment costs during the early stages of new product development.
- Flexible Yarn Combination
Suitable for testing different yarn counts, raw materials, colors, and yarn combinations.
- S/Z Twist Testing
Allows development and comparison of different twist directions and twist levels.
- Flexible Operation
Process parameters can be quickly adjusted according to customer requirements.
- Compact Laboratory Design
The compact design is suitable for laboratories, R&D centers, educational institutions, and textile research facilities.
- Greatest Commercial Value
The greatest value of this machine is not high-volume production. Instead, it helps customers:
Develop products faster, produce samples faster, and determine the optimum production process faster.
Its commercial concept can be summarized simply as:
Small Machine for Sampling, Large Machine for Production.
The development process is:
Laboratory Sampling
↓
Customer Testing
↓
Sample Approval
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Process Confirmation
↓
Industrial Production
↓
Large-Scale Production Equipment Order
Therefore, this machine can serve as an important front-end R&D and sampling tool for the sales of large-scale textile machinery.
For machinery manufacturers and agents, it can also be positioned as a “Customer Development Machine.”
Customers can first use the laboratory machine to develop and test new yarn products. Once the desired yarn specification and production process are confirmed, the customer can then be guided toward purchasing industrial yarn doubling machines, two-for-one twisters, twisting machines, or complete yarn production lines.