Yarn Winders: Soft Winding and Hard Winding Machines
Last Updated: July 26, 2020
Before we get started, we would suggest you to read our previous post covering the basics of yarn winding technologies. If you have read that, then you already know there are 3 types of winding technologies –
In general, non-precision winding is mainly used in the hard winding section, and the precision and hybrid winding are used in the winding section.
Let’s get started with soft winding machines first.
Among all the soft winding machine that are available in the market today, SSM and FADIS are the most dominant ones. They have some very similar features and some not so similar ones. We’ll go one by one. Let’s start with the Swiss one first; the SSM.
This Italy based machine has some unique features. We’ll discuss them one by one. But first, let’s take go over its yarn path.
I think you’ve already noticed from the above yarn path diagram that this one’s yarn clearer and tensioner looks different. And yes it is! We’ve talked about the tension setting of winders in a separate post if you’re interested. Let’s take a look at how these two mechanisms work in this single unit.
Well, that marks the end of our lesson on the soft winding machines. Now, we’ll glance over the hard winding machines.
We already know that the hard winding machines have winding systems which work on Random Winding principal that has the following properties –
An ideal Hard Winding machine should have the following features –
You might have noticed from the diagrams that the waxing units look different. That’s because their mechanisms differ as well.
There are two variations of CW8-W. The older one (2011) has the following arrangement –
The newest one (2016) has the following arrangement –
Among the two brands, the SSM CW8-W(2016) model had a sampling device, which comes very handy.
Well, that’s it for now. I hope after reading this article you have a thorough understanding of the similarities and the differences between the machines of these two giant brands.
1. Can we use hard winding machines as soft winding?
Technically, you can after certain modifications, starting with the bobbin holder. The waxing unit needs to go as well. But it’s not worth the trouble because patterning will be unavoidable. So, you won’t get the desired dyeing result that you would want. Also, there’s not much benefit in terms of production speed either.
2. What is the winding ratio of a drum winding machine?
It’s very simple to measure. All you have to do is measure the no. of coil that’s formed by its double traverse. Initially, the winding ratio would double the amount of coil that’s grooved on the drum. But as the diameter of the package increases, you’d see a fall in winding ratio.
3. Why can we make pineapple package with FADIS but not with SSM?
Well, it has got to do with the traverse length. FADIS lets us change the traverse length gradually. As the traverse length decreases the package becomes rounder. The moving guide facilitates this process.
Unfortunately, the SSM machines don’t come with traverse length changing features. The rotating blade system isn’t ideal for traverse length variations during package build-ups.
|TABLE OF CONTENTS|
|Yarn Path Diagram of SSM TW2W|
|Winding Arrangement of SSM TW2W|
|Yarn Path Diagram of SSM PS6W|
|Winding Arrangement of SSM PS6W|
|Balloon Breaker of SSM PS6W|
|Yarn Path Diagram of FADIS P300|
|Yarn Clearer and Tensioner of FADIS P300|
|Winding Arrangement of FADIS P300|
|Yarn Path Diagram of SSM CW2W Hard Winder|
|Winding Arrangement of SSM CW2W Hard Winder|
|Yarn Path Diagram of FADIS P300 Hard Winder|
|Winding Arrangement of FADIS P300 Hard Winder|
|Differences in Waxing Units|
|Sampling Device of Hard Winding Machine|
|Frequently Asked Questions|