EP2083106B1

EP2083106B1 - High performance plastic tube for dyeing and finishing processes of yarn packages

Info

Publication number: EP2083106B1
Application number: EP08000878A
Authority: EP
Inventors: Sema Palamutcu; Rasul Fatdakov
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2010-12-15
Anticipated expiration: 2028-01-17
Also published as: DE602008003967D1; EP2083106A1; ATE491835T1

Abstract

Tubular body (1) of yarn dyeing tube comprises flanges (2) and (3) with circumferential hollows (8), longitudinal (4) and circumferential (5) ribbings, hollow areas (6) composed by intersections of the ribbings, supporting disk (7) placed between flanges, circumferentially positioned hollows (17) of the disk, plastic net (11) fixed to the flanges, circumferential (12) and longitudinal (13) ribbings and hollow areas (14) of the net. Grooves (9) at the outer edge of the left flange (2) and grooves (10) at the inner edge of the right flange are used for nesting of plastic net (11) by the help of notches (15) and (16). Introduced tube structure can be built up both cylindrical and conical form and used for dyeing or finishing processes of yarn packages. Proposed tube provides better dyeing and finishing quality, increased productivity, and energy saving comparing the current dye tubes.

Description

Field of Invention

The invention concerns a plastic tubular body used during the dyeing and finishing procedure of yarn packages. The new tube improves dyeing quality reduces yarn waste and time requirement of dyeing and drying processes. Therefore the invention provides increased productivity, and savings on time and energy consumption of the dyeing process.

Background of the Invention

It is important to mention the "Useful Surface Coefficient" (U_SC) parameter to evaluate the performance of the dyeing tubes.
Useful Surface Coefficient (U_SC) is defined as rate of total hollow area on the surface of the tube (S_H) to the total yarn winding surface area (S_T).
U_SC = S_H / S_T or % U_SK = (S_H / S_T) 100
U_SC is a structural parameter to characterize the new tube designs, designating the percent of total dye transferable area to the total tube surface area.
Currently available plastic yarn tubes are designed to comprise a tubular or conical body having different shaped hollow areas on their surfaces and the dye effluent is pumped to the yarn package from inside of the tube. The U_SC value (ratio of total hollow area of the tube surface to total yarn winding surface area of the tube) has been determined quite low for the current commercial tubes. Investigations about the U_SC of commercial available tubes has shown that U_SC value has changed between 0.28 - 0.55. Low U_SC value of the current tubes is one of the reasons for dyeing inaccuracy on the lower layers of the wound yarn body on the packages. Considering the inside through outside dye effluent flow dyeing process, direct contact of dye effluent and the lowest yarn layer of the wound yarn body is only limited by the hollow surface area of the tube. Dye effluent directly flows to areas of wound yarn body which are befitted on the hollow areas of the tube surface, maintaining better dye pick up than areas of wound yarn body which are befitted on the solid areas of the tube surface. Considering the outside through inside dye effluent flow dyeing process, dye solution flows along the yarn layers and run out at the lowest yarn layer of the wound yarn body through the hollow areas of tube surface. On the solid areas of the tube body, contact time of dye effluent and yarn layers are longer than those contact time of the hollow areas of the tube. Because of the contact time difference of the wound yarn areas, color deepness differences occur along yarn length. Color deepness differences may reach up to 3 % to 5 % of the defected yarn in yarn dye houses.
Another aspect of the low U_SC value of the current tubes is higher time requirement for dyeing and drying processes of the yarn packages. Circulation of dye effluent and hot air through surface hollows of the tube is also low resulting low U_SC value of the tubes. Low dye effluent and air circulation area require longer dyeing and drying time. Therefore yarn package dyeing and drying efficiency becomes lower.
Structural shape of currently used commercial plastic tubes (especially cylindrical ones) is easily deformed and descended in the middle of the tube body as result of the normal pressure resulting of dyeing and drying processes. Such deformation decreases the lifetime of the tube.
Similar inventions are explained in the patents of Russia (former Soviet Union SU1832778A1 ), and Turkish Patent Institute, ( TR 2006 01193Y ).
SU 1832778 A1 introduces a stainless steel conical hollowed tubular body with ribbing rings around outer surface, and screen clothing attached to the rings. The tube comprises a hollowed body with rear and middle disks riveted around and screen clothing attached to the outer surfaces of the disks. Attachment of the screen clothing onto the rear disks is fixed using elastic rings and screws.
Patent of TR 2006 01193Y comprises a plastic tubular body, and screen clothing fixed onto the outer surface of the circumferential disks of the plastic tubular body. Plastic tubular body also comprises flanges at the right and left edges, longitudinal and circumferential ribbings attached to the main tubular body, and replaceable segmented screen clothing to cover the whole tubular body.
Although U_SC value of both patents described above is around 0.80-0.90. they are not practically usable in the yarn dye houses. Manufacturing of the tubes is time consuming process because of several distinct parts and requirement of extra fixing process of the screen clotting to the main body. Equipment used for the fixation of screen clothing is also affected by the dyeing conditions and it can be oxidized, resulting color degradation of the yarn in some layers of the yarn package. Another disadvantage of the proposed tube is about screen clothing which causes wearing of winding drum. Worn off surface of the drum causes increased number of yarn breakage during the winding of yarn package.

Summary of the Invention

Main aims of the proposed invention are to improve dyeing quality of yarn packages, to reduce yarn waste of dyeing defects, to increase dyeing and finishing efficiency of the yarn packages, provide energy savings.
The invention comprises a plastic tubular body and a plastic net placed around the tubular surface of the plastic body; the plastic net's surface enables to uptake high dye flow rate (high value of U_SC) and material of the net has high rigidity property to bending and inflection.
Details of the invention will be described in greater detail here under with reference to the example of the accompanying drawings which show constructional details of the high performance plastic tube. In the drawings:

FIG. 1 shows longitudinal cross section of the tubular body in horizontal position:
FIG. 2 is a cross sectional view. A-A of FIG. 1;
FIG. 3 is longitudinal cross section of the plastic net in horizontal position;
FIG. 4 is a cross sectional view of plastic net, B-B of FIG.3;
FIG. 5 is longitudinal cross section of the tube in horizontal position,
FIG. 6 is cross sectional view. C-C of FIG. 5;
FIG. 7 is cross sectional view, D-D of FIG. 5;

Components of the tube figures are numbered as it is listed below:

(1) - main body of the tube.
(2) - first flange of the body.
(3) - second flange of the body.
(4) - longitudinal ribbings of the body.
(5) - circumferential ribbing of the body,
(6) - hollow areas of main body surface.
(7) -supporting disk.
(8) - hollow areas of the flange,
(9) - grooves of the body first flange.
(10) - grooves of the the body second flange.
(11) - plastic net.
(12) - circumferential ribbings of the net,
(13) - longitudinal ribbing of the net.
(14) - hollow areas of the net.
(15) - left edge notches of the net,
(16) - right edge notches of the net,
(17) - hollow places of supporting disk.

Detailed description of a preferential embodiment

Tubular body of the tube (1) shown in FIG.1, FIG.2, FIG.5, and FIG.7 comprises first (2) and second (3) flanges having circumferential hollows (8), longitudinal (4), circumferential (5) ribbing of tubular body, hollow areas of main body (6), supporting disk (7) placed between flanges (2) and (3) at equal distances, and hollow places (17) of supporting disk Plastic net (11) is fixed on to the tubular body. Fixation of the plastic net onto the tubular body is completed by the help of transverse grooves of the first flange (9), and grooves (10) of second flange inner diameter.
Plastic net (11) of the tube is shown in FIG.4, FIG.5, FIG.6, and FIG.7 and comprises circumferential (12) and longitudinal (13) ribbings and rectangular hollows (14) constituted by intersections of ribbing (12) and (13). Inner circumference of net left and right edges comprise notches (15) and (16). Fixation of the net onto the tubular body is completed by nesting of notches (15) to the grooves (9) of first flange and notches (16) to the grooves (10) of second flange. Width of the net ribbings is not wider than 1.5 mm and depth thickness of net ribbings is not more than 3 mm.
Utilization of the high performance plastic tube:
A regular yarn package winding machine is equipped with the proposed tube, required amount of yarn is wound onto the tube at desired density and wound yarn package is sent to the package dyeing machine. Yarn packages are placed onto the perforated cylinder of the dyeing machine tank. Second flange (3) (becomes bottom edge flange) of the yarn package is nested to the first flange (2) (becomes upper edge flange) of the below yarn package. After completing the yarn package placement of the dye tank, dyeing process is started.
Dye effluent is pumped through wound lavers of yarn packages from the inside of the tubes, starting from the hollow areas (6) of the tubular body (1), hollow areas (14) of the net (11) and bottom layers of the yarn wounds. When the pumping of dye effluent from inside to outside of the yarn package is stopped, collected dye liquid flows and drained to innerside of the yarn package through hollow areas (14) of the net (11) to the hollow areas (6) of the main body and hollows of the flanges (8). If the dye liquid is feed from the outside of the yarn package, dye liquid moves inside of the yarn layers quickly, and absorbed by the yarn layers. Over fed dye liquid flows through hollow areas (14) of the plastic net (11) to hollow areas (6) of the tube and hollows (17) of the supporting disk(7). Therefore effective and quick circulation of dye liquid through inner structre of yarn package is completed.
Proposed tube minimizes contact surface of the lowest yarn layers and solid parts of the tube, does not allow any dye liquid collection between the intersection surface of lowest yarn layers and ribbings (12) and (13) therefore constitution possibilty of deeper color dyeing defects on the lowest yarn layers is minimized. Color difference among layers of yarn package is therefore eliminated. Such improvement on the color shade difference of the yarn can not be provided neither by the elevated ribbings of the patent DE 10 56 569 B tube structure nor the spaced uprights of the patents US-A-3 882 698 tube structure.
Employment of supporting disk (7) between flanges (2) and (3) provides long life to the tube, maintaining higher resistance to bending and deformation of the tube against high stress loads of dyeing and drying processes of the yarn packages. Such resistance properties are not provided by the DE 10 56 569 B . US 2004 /016842 A1 and US-A-3 882 698 .
Useful Surface Coefficient (U_SC) value of the proposed tube is increased to the 0.85 from the 0.28-0.55 value of current commercial tubes and also tubes defined in the patents of DE 1056569 B . US 2004 / 016842 A1 and US A-3 882 698 . Improvement of U_SC value is warranted by the use of introduced tubular body and net structures. Increased U_SC value of proposed tube provides better dye effluent flow efficiency, by the help of 1.6 to 2.5 times increased dye effluent flow surface areas comparing the current commercial tubes. Enlargement of dye effluent flow area of the tube enable to decrease dyeing and drying time and pumping pressure requirements, therefore energy requirement is decreased with increased efficiency. Tube structures defined in the patents of SU1832778A1 and TR200601193Y provide U_SC value of 0,85 while still having above mentioned disadvantages.

Claims

Plastic tube for dyeing of yarn packages comprising a plastic tubular body (1) and a plastic tubular net (11) placed around the tubular body (1), said tubular body (1) comprising longitudinal ribbings (4), circumferential ribbings (5) and hollow areas (6) composed by intersections of said ribbings (4.5), first and second flanges (2,3) being located at the ends of said tubular body (1), a supporting disc (7) being positioned between said flanges (2.3), said first and second flanges (2,3) being provided with circumferential hollows (8); said tubular net (11) being provided with longitudinal ribbings (13), circumferential ribbing (12) and hollow areas (14).
A dye tube as in claim 1, comprising grooves (9) on the outer circumference of first flange (2) and grooves (10) on the inner circumference of second flange (3) of the tubular body (1).
A dye tube as in claim 1 and claim 2, comprising notches (15,16) at the inner sides of both edges of the tubular net (11).
A dye tube as in claim 1, which can also be build up as conic shaped tube.