What is count and its types?
Count is numerical expressions which express or indicate the coarseness or fineness of yarn used in textile. Types of yarn count: a) Indirect system- English, Metric, Worsted. b) Direct system- Tex, Denier, Lbs/Spindle. Indirect count: The count of yarn expresses the number of length units in one weight unit.
What is type of count?
There are five variants of COUNT functions: COUNT, COUNTA, COUNTBLANK, COUNTIF, and COUNTIFS. We need to use the COUNTIF function or COUNTIFS function if we want to count only numbers that meet specific criteria. If we wish to count based on certain criteria, then we should use COUNTIF.
How is Textile count calculated?
In the direct denier system, the yarn count number indicates the weight in grams of 9000 meters of yarn. Example: 30 Denier indicates that 9000 meters of yarn weight 30 grams….Textile Yarn Count Numbering System and Conversions.
| Numbering system | Units of length(l) | Units of weight(W) |
|---|---|---|
| Metric count (Nm) | 1000 meters / 1km | 1 kg |
| Woolen count (YSM) | 256 yards | 1 pound (lb.) |
What is count in spinning?
Spinning count is a measure of fibre fineness and distribution developed by the English. It is defined as the number of hanks of yarn that can be spun from a pound of wool.
How do you calculate decitex?
1 decitex = 1/10 tex. 1 militex = 1/1,000 tex. Another expression of fineness for continuous filament yarn is the denier, which is expressed as the mass in grams (g) per 9,000 metres (m). As an example, a 3 denier yarn means that the mass of 9,000 m of yarn is 3 g.
What is the spinning process?
Spinning: A process of making yarn from fibers. In this process a mass of cotton wool fibers are drawn out and twisted. It is an art where the fiber is drawn out, twisted, and then wound onto a bobbin. By this, fibers come together to form a yarn. Spinning can be done by hand and charkha.
How does spinning strengthen the fibers?
These bonds produce strong inter-chain forces in the fiber, which increase its tensile strength. The polymer chains within the fibers also have a large degree of orientation, which increases strength. The fibers are first air dried, then cooled further in a liquid bath.
What is the purpose of spinning?
Improve Your Cardio for a Healthy Heart. Spinning can be performed as an anaerobic exercise, pulling energy from reserves and building up muscular endurance over an extended timeframe. However, there are also aerobic benefits. Spinning classes include both endurance and cardiovascular training.
What is hot spinning?
“Hot spinning” involves spinning a piece of metal on a lathe while high heat from a torch is applied to the workpiece. Once heated, the metal is then shaped as the tool on the lathe presses against the heated surface forcing it to distort as it spins.
What is hydroforming process?
Hydroforming, or internal high pressure forming, is a forming process with an active fluid (often a water-oil emulsion). A hollow part is formed from a tube, any profile or two blanks, by applying internal pressure.
What are the advantages of spinning process?
Cost savings are further enhanced from the inherent smooth finish that spinning produces, often eliminating the need for additional machining. Other advantages are very low tooling compared to stamping, as well as very short setup and changeover times. The process is also eco-friendly with less waste being produced.
Can you spin steel?
Spinning tools can be made of hardened steel for use with aluminum, or from solid brass for spinning stainless steel or mild steel. Some metal spinning tools are allowed to spin on bearings during the forming process. In CNC applications, carbide or tool steel cut-off tools are used.
Can you spin stainless steel?
Stainless Steel Metal Spinning or Spin Forming Stainless steel is available in a wide range of alloys and types, with varying properties that make them suitable for use across a broad number of applications and industries. 304 and 316 Stainless are the most common types used in the spinning process.
Why spinning is called a flow turning process?
In the “flow-turning” process, thick gauge material is made to flow plastically by pressure rolling it in the same direction as the roller is travelling, so that a component is produced in which the wall thickness is much less than that of the original blank. This is a more automated process than metal spinning.
How old is Metal Spinning?
Metal spinning can be traced back thousands of years. The first pictorial evidence is in the tomb of fourth-century Egyptian pharaoh Petosiris, which features an illustration of two men operating an ancient lathe.
What is deep drawing process?
Process definition: The deep drawing process is a forming process which occurs under a combination of tensile and compressive conditions. A flat sheet metal blank is formed into a hollow body open on one side or a hollow body is formed into a hollow body with a smaller cross-section. [ DIN 8584]
What is tube spinning?
Tube spinning is an effective and stable method for manufacturing thin metal tubes, which are used as steel belts for precision conveyers, printing rollers in printers, elastic rolls in production lines for optical films and flexible solar panels and so forth.
What is a metal spinning machine?
Also known as metal turning, metal spinning is a type of metalworking process that involves the use of a rotating machine — typically a CNC lathe — to deform metal over a pre-shaped mold. Rather, metal spinning changes the shape of metal to reflect that of the mold on which it was spun.