CA1279987C - Crimper discharge regulation - Google Patents
Crimper discharge regulationInfo
- Publication number
- CA1279987C CA1279987C CA000550859A CA550859A CA1279987C CA 1279987 C CA1279987 C CA 1279987C CA 000550859 A CA000550859 A CA 000550859A CA 550859 A CA550859 A CA 550859A CA 1279987 C CA1279987 C CA 1279987C
- Authority
- CA
- Canada
- Prior art keywords
- gates
- gate
- outlet
- hinged
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
Abstract
TITLE
Crimper Discharge Regulation Abstract of the Disclosure A gate/loading arrangement which balances applied gate force between the edges of tow being crimped in a stuffer box crimper. A single hinged gate has been replaced with two or three equal sized gates and force is applied to the gates from an air cylinder through a pivotal linkage.
Crimper Discharge Regulation Abstract of the Disclosure A gate/loading arrangement which balances applied gate force between the edges of tow being crimped in a stuffer box crimper. A single hinged gate has been replaced with two or three equal sized gates and force is applied to the gates from an air cylinder through a pivotal linkage.
Description
~ 7998~
TITLE
- Crimper Discharge Regulation Background of the Invention This invention relates to stuffer box crimping of yarn, and more particularly, it relates to a method and apparatus for controlling crimp.
Stuffer box crimpers are well known and have been widely employed for crimping filament strands, including for example, yarns, tows and threads.
In the case of tow, formed of several ropes of yarn, crimp level is controlled by the amount of force applied to the tow band by a single hinged gate associated with the outlet of the crimping chamber. A
problem may arise because the thickness of the tow band entering the crimper varies across the width of the band due to interactions between the ropes which make up the tow.
The two edges of the tow band experience the greatest variations due to contact with guides employed to position the tow band ahead of the crimper. While one edge~may be consistently thicker than the other, a more common occurrence is the periodic thickening of one edge with a simultaneous thinning of the opposite edge.
Either of these conditions results in poor crimp uniformity across the tow band width. In severe cases operabiIity (crimper jamsj becomes a major~problem.
This occurs when the thick edge carries~most of the gate force causing the thin edge to become slack.
Summary of the Invention An improved process and apparatus has~been developed which continuously balances the applied gate forces between the edges of the tow being crimped. The single hinged gate~is divided into a plurality of hinged ~gates and any ~unequal force applied to~the gates due to 35~ ;variations in;the thickness of the tow exiting the :
:: : ~: :
.
:::
9~7 crimping chamber is balanced by transferring forces between the gates by means of a pivoting linkage located between the gates and the source of force applied to the gates.
The gate arrangement may be a double or triple gate arrangement.
srief Description of the Drawings Fig. 1 is a perspective view of one embodiment of the invention with two hinged gates.
Fig. 2 is a perspective view of another embodiment of the invention with three hinged yates.
Referring to the drawings, a continuous tow 10 is fed by means of rollers 12, 14 into the inlet 15 of stuffer box 16 comprising a crimping chamber and a regulation means at the outlet 17 of the stuffer box in the form of two gates 18, 20 of equal size hinged to stuffer box 16 via pin 21 (Fig. 1) or three equal sized hinged gates 22, 24, 26 (Fig. 2).
~ In Fig. 1, an air cylinder 28 applies a force as desired through pivoting linkage 30 against gates 18, 20. The pivoting Iinkage 30 includes a bar 32 and pin supports 34, 36, 38 fixed to gate 18, gate 20 and cylinder rod 29, respectively. Bar 32 lS loosely pinned at its ends in~pin supports 34, 36 and at its center in pin support 38 attached~to cylinder rod 29. Air cylinder 28 is a doub~le~ acting cyli;nder which applies pressure through rod~29 against gates 18,20 through linkage 30. Comp~ressed~air is suppli:ed from a source indicated by ar~row 40~through pressure control valves 42, 43 via pipe~s 44~, 45~to cylinder 28.
In operation, the pressure~is~manually set at the top~of cylinder 28 by adjusting cont~roiler 43, and`
at the` bottom of~cylinder 28~by controller 42, then as either gate 18~ or 20 is forced open by tow 10 which has ~a thicker~than~normal portion along its edge, the ~ react~lon~force applied to the gate will be transferred ::: : :
:: :: :
:::
,:
99~7 via the pivoting bar 32 to the other gate. This results in a more uniform application of gate loading to both halves of the tow regardless of thickness. The crimped tow 11 emerging from the stuffer box 16 falls into a collection means (not shown).
In Fig. 2, like elements are numbered the same as in Fig. 1 and in this embodiment three gates are used, i.e., 22, 24, 26 and the pivoting linkage is constructed to have pin supports 34', 36', and 38' fixed to gates 22, 24 and 26, respectively. The bar 32 is loosely pinned at its ends to pin supports 34' and 36' - and at its center to pin support 38', by pins 50, 54, 52, respectively. The air cylinder rod 29 is pinned to pin support 38' by means of loosely fitted pin 56.
This embodiment with three gates, hinged at pin 21 which passes through stuffer box 16, has the ability to give more or less loading to the side gates 22, 24 versus the center gate 26 by shifting the relative location of pins 50 and 54 with respect to pin 52.
For example, if more loading is desired on gates 22, 24 than on gate 26 then locations of pins 50, 54 relative ~to location of pin 52 would be placed to position gates 22, 24 forward of gate 26. Conversely, if less force is desired on gates 22, 24~than on gate 26, locations of~pins 50, 54 rel~a~tive to pin 52 would~be placed to position gates 22, 2;4 behi~nd gate 26.
In a~ series of~runs on four different polyester products fed into a staffer box crlmper under substantially similar conditions for each product a comparison of crimp uniformity using a single hinged ~gate versus two~hinged gates~(Fi~g. lj was made using the standard~deviation (means~ square of successive differences~) of~ the crlmps~ per inch. The results are ~ shown ~in~the table below.
~ "
:
~ ~ 3 : ~: :~::
' ::::
:: :
` : : : : :
' t87 Product _ Standard Deviation Denier/filament Ty~e Polyester SinglP gate Two gates 12.0 776 0.884 0 766 12.0 768 0.695 0 596 3.0 35 0.744 0.695 1.5 811 1.061 0.875 In each case, the standard deviation of crimps per inch for the two gate arrangement is less than that of the single gate thus confirming a more uniform level of crimp.
:
-~ :
:
` ~ :
:
: ~ :: :
TITLE
- Crimper Discharge Regulation Background of the Invention This invention relates to stuffer box crimping of yarn, and more particularly, it relates to a method and apparatus for controlling crimp.
Stuffer box crimpers are well known and have been widely employed for crimping filament strands, including for example, yarns, tows and threads.
In the case of tow, formed of several ropes of yarn, crimp level is controlled by the amount of force applied to the tow band by a single hinged gate associated with the outlet of the crimping chamber. A
problem may arise because the thickness of the tow band entering the crimper varies across the width of the band due to interactions between the ropes which make up the tow.
The two edges of the tow band experience the greatest variations due to contact with guides employed to position the tow band ahead of the crimper. While one edge~may be consistently thicker than the other, a more common occurrence is the periodic thickening of one edge with a simultaneous thinning of the opposite edge.
Either of these conditions results in poor crimp uniformity across the tow band width. In severe cases operabiIity (crimper jamsj becomes a major~problem.
This occurs when the thick edge carries~most of the gate force causing the thin edge to become slack.
Summary of the Invention An improved process and apparatus has~been developed which continuously balances the applied gate forces between the edges of the tow being crimped. The single hinged gate~is divided into a plurality of hinged ~gates and any ~unequal force applied to~the gates due to 35~ ;variations in;the thickness of the tow exiting the :
:: : ~: :
.
:::
9~7 crimping chamber is balanced by transferring forces between the gates by means of a pivoting linkage located between the gates and the source of force applied to the gates.
The gate arrangement may be a double or triple gate arrangement.
srief Description of the Drawings Fig. 1 is a perspective view of one embodiment of the invention with two hinged gates.
Fig. 2 is a perspective view of another embodiment of the invention with three hinged yates.
Referring to the drawings, a continuous tow 10 is fed by means of rollers 12, 14 into the inlet 15 of stuffer box 16 comprising a crimping chamber and a regulation means at the outlet 17 of the stuffer box in the form of two gates 18, 20 of equal size hinged to stuffer box 16 via pin 21 (Fig. 1) or three equal sized hinged gates 22, 24, 26 (Fig. 2).
~ In Fig. 1, an air cylinder 28 applies a force as desired through pivoting linkage 30 against gates 18, 20. The pivoting Iinkage 30 includes a bar 32 and pin supports 34, 36, 38 fixed to gate 18, gate 20 and cylinder rod 29, respectively. Bar 32 lS loosely pinned at its ends in~pin supports 34, 36 and at its center in pin support 38 attached~to cylinder rod 29. Air cylinder 28 is a doub~le~ acting cyli;nder which applies pressure through rod~29 against gates 18,20 through linkage 30. Comp~ressed~air is suppli:ed from a source indicated by ar~row 40~through pressure control valves 42, 43 via pipe~s 44~, 45~to cylinder 28.
In operation, the pressure~is~manually set at the top~of cylinder 28 by adjusting cont~roiler 43, and`
at the` bottom of~cylinder 28~by controller 42, then as either gate 18~ or 20 is forced open by tow 10 which has ~a thicker~than~normal portion along its edge, the ~ react~lon~force applied to the gate will be transferred ::: : :
:: :: :
:::
,:
99~7 via the pivoting bar 32 to the other gate. This results in a more uniform application of gate loading to both halves of the tow regardless of thickness. The crimped tow 11 emerging from the stuffer box 16 falls into a collection means (not shown).
In Fig. 2, like elements are numbered the same as in Fig. 1 and in this embodiment three gates are used, i.e., 22, 24, 26 and the pivoting linkage is constructed to have pin supports 34', 36', and 38' fixed to gates 22, 24 and 26, respectively. The bar 32 is loosely pinned at its ends to pin supports 34' and 36' - and at its center to pin support 38', by pins 50, 54, 52, respectively. The air cylinder rod 29 is pinned to pin support 38' by means of loosely fitted pin 56.
This embodiment with three gates, hinged at pin 21 which passes through stuffer box 16, has the ability to give more or less loading to the side gates 22, 24 versus the center gate 26 by shifting the relative location of pins 50 and 54 with respect to pin 52.
For example, if more loading is desired on gates 22, 24 than on gate 26 then locations of pins 50, 54 relative ~to location of pin 52 would be placed to position gates 22, 24 forward of gate 26. Conversely, if less force is desired on gates 22, 24~than on gate 26, locations of~pins 50, 54 rel~a~tive to pin 52 would~be placed to position gates 22, 2;4 behi~nd gate 26.
In a~ series of~runs on four different polyester products fed into a staffer box crlmper under substantially similar conditions for each product a comparison of crimp uniformity using a single hinged ~gate versus two~hinged gates~(Fi~g. lj was made using the standard~deviation (means~ square of successive differences~) of~ the crlmps~ per inch. The results are ~ shown ~in~the table below.
~ "
:
~ ~ 3 : ~: :~::
' ::::
:: :
` : : : : :
' t87 Product _ Standard Deviation Denier/filament Ty~e Polyester SinglP gate Two gates 12.0 776 0.884 0 766 12.0 768 0.695 0 596 3.0 35 0.744 0.695 1.5 811 1.061 0.875 In each case, the standard deviation of crimps per inch for the two gate arrangement is less than that of the single gate thus confirming a more uniform level of crimp.
:
-~ :
:
` ~ :
:
: ~ :: :
Claims (9)
1. In a stuffer box crimping process in which yarn is forced into a crimping chamber and the outlet of the chamber is provided with a single hinged gate having force applied thereto by fluid pressure means, the improvement of which comprises: dividing said single gate into a plurality of hinged gates positioned side-by-side across the width of said outlet and balancing any unequal force applied to said gates due to variations in thickness of yarn exiting said outlet by transferring force among gates by means of a linkage connected between said gates and said fluid pressure means.
2. The method of claim 1 wherein said gate is divided into two hinged gates of equal size.
3. The method of claim 1 wherein said gate is divided into three hinged gates of equal size.
4. A yarn crimping apparatus comprising a crimping chamber having an inlet and an outlet;
means located adjacent the inlet of the crimping chamber for forcing yarn into the chamber;
a plurality of hinged gates in a side-by-side relationship associated with the outlet of the crimping chamber to regulate the discharge of yarn from the chamber;
means for applying force to said gates;
and means for balancing any unequal force applied to said gates due to variations in the thickness of the yarn exiting the outlet of the crimping chamber.
means located adjacent the inlet of the crimping chamber for forcing yarn into the chamber;
a plurality of hinged gates in a side-by-side relationship associated with the outlet of the crimping chamber to regulate the discharge of yarn from the chamber;
means for applying force to said gates;
and means for balancing any unequal force applied to said gates due to variations in the thickness of the yarn exiting the outlet of the crimping chamber.
5. The apparatus of claim 4, wherein said means for balancing any unequal force due to variations in thickness of the yarn exiting the outlet of the crimping chamber is a pivoting linkage connected between said hinged gates and said means for applying force to said gates.
6. The apparatus of claims 4 or 5 wherein there are two gates.
7. The apparatus of claims 4 or 5 wherein there are three gates.
8. The apparatus of claim 6 wherein said gates are of equal size.
9. The apparatus of claim 7 wherein said gates are of equal size.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/927,593 US4707896A (en) | 1986-11-05 | 1986-11-05 | Crimper discharge regulation |
| US927,593 | 1986-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279987C true CA1279987C (en) | 1991-02-12 |
Family
ID=25454957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000550859A Expired - Lifetime CA1279987C (en) | 1986-11-05 | 1987-11-03 | Crimper discharge regulation |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4707896A (en) |
| EP (1) | EP0266766A3 (en) |
| JP (1) | JPS63152428A (en) |
| KR (1) | KR900000140B1 (en) |
| CA (1) | CA1279987C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5020198A (en) * | 1988-08-10 | 1991-06-04 | Filter Materials Ltd. | Crimped textile fibers and stuffer box apparatus and methods for crimping textile fibers |
| US6351877B1 (en) | 2000-05-31 | 2002-03-05 | Eastman Chemical Company | Synthetic fiber crimper, method of crimping and crimped fiber produced therefrom |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2514557A (en) * | 1948-08-07 | 1950-07-11 | Alexander Smith & Sons Carpet | Crimping apparatus |
| FI40654B (en) * | 1963-06-24 | 1968-12-31 | Glanzstoff Ag | |
| US3234626A (en) * | 1963-10-28 | 1966-02-15 | Monsanto Co | Apparatus for hot and cold crimping of textile filaments |
| US3241213A (en) * | 1964-01-13 | 1966-03-22 | Monsanto Co | Quick-opening stuffing box |
| US3231958A (en) * | 1964-01-20 | 1966-02-01 | Du Pont | Apparatus for guiding a textile tow |
| US3406436A (en) * | 1965-11-30 | 1968-10-22 | Allied Chem | Crimping process |
| US3553802A (en) * | 1968-04-04 | 1971-01-12 | Techniservice Corp | Strand crimping |
| DE1816028C3 (en) * | 1968-12-20 | 1982-06-09 | Vepa AG, 4125 Riehen, Basel | Device for crimping synthetic thread sheets |
| CH529856A (en) * | 1970-08-10 | 1972-10-31 | Vepa Ag | Device for crimping synthetic thread sheets |
| US3859695A (en) * | 1973-01-05 | 1975-01-14 | Phillips Petroleum Co | Stuffer box control |
| US4547934A (en) * | 1984-01-31 | 1985-10-22 | Phillips Petroleum Company | Crimped staple fiber |
-
1986
- 1986-11-05 US US06/927,593 patent/US4707896A/en not_active Expired - Fee Related
-
1987
- 1987-11-03 CA CA000550859A patent/CA1279987C/en not_active Expired - Lifetime
- 1987-11-04 JP JP62277561A patent/JPS63152428A/en active Pending
- 1987-11-04 KR KR1019870012353A patent/KR900000140B1/en not_active IP Right Cessation
- 1987-11-05 EP EP87116294A patent/EP0266766A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0266766A3 (en) | 1990-02-07 |
| US4707896A (en) | 1987-11-24 |
| JPS63152428A (en) | 1988-06-24 |
| KR880006396A (en) | 1988-07-22 |
| KR900000140B1 (en) | 1990-01-20 |
| EP0266766A2 (en) | 1988-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |