EP1905876B1 - High speed circular knitting machine with a floss blowing and heat dissipating apparatus - Google Patents
High speed circular knitting machine with a floss blowing and heat dissipating apparatus Download PDFInfo
- Publication number
- EP1905876B1 EP1905876B1 EP06121568A EP06121568A EP1905876B1 EP 1905876 B1 EP1905876 B1 EP 1905876B1 EP 06121568 A EP06121568 A EP 06121568A EP 06121568 A EP06121568 A EP 06121568A EP 1905876 B1 EP1905876 B1 EP 1905876B1
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- EP
- European Patent Office
- Prior art keywords
- air
- floss
- cylinder
- circular knitting
- knitting machine
- 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.)
- Not-in-force
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/30—Devices for controlling temperature of machine parts
Definitions
- the present invention relates to a high speed circular knitting machine having a floss blowing and heat dissipating apparatus according to the preamble of claim 1.
- Operation of a conventional circular knitting machine generally includes the steps of yarn supplying, knitting and fabric winding.
- the cylinder rotates about the center of the circular knitting machine.
- cams surrounding the cylinder that have tracks to direct needles located in the needle troughs of the cylinder to move up and down.
- sinkers are moved forwards in correspondance to the needles to proceed with the knitting operation.
- the supplying yarns In order to smooth the knitting operation, the supplying yarns must be stretched tightly.
- the yarns often generate lint or floss during operations of yarn sinking, yarn directing and yarn feeding. If the floss is not removed, it tends to clog various elements of the circular knitting machine and affect the smoothness of knitting operation, and even shorten the life span of the circular knitting machine.
- U.S. patent No. 5,737,942 entitled “MEANS FOR DETERRING LINT AND DEBRIS ACCUMULATION ON THE KNITTING ELEMENTS OF A CIRCULAR KNITTING MACHINE” has a curved plate interposed between a horizontal frame plate and a circular frame plate and a straddle seat to form an air chamber. Through an air pump and an air supply hose, pressurized air is delivered into the air chamber. The pressurized air is dispersed naturally to the cylinder and other elements through an annular gap formed between the straddle seat and the circular frame plate to blow away the floss and achieve a cooling effect.
- U.S. patent No. 6,199,408 entitled “Cooling apparatus for knitting components” includes a cover located between an intermediate ring and a lower ring, and a cylindrical chamber formed between a needle-selecting actuator and the cover. There is a ventilator fan located on the cover to draw external air into the chamber. Channeling by an opening of the chamber enables dispelling heat generated on the cylinder and the surrounding operation elements.
- U.S. patent No. 5,737,942 but fares even worse in terms of the effect of floss blowing and cooling effect. All the problems of the conventional techniques, such as poor floss blowing and cooling effect, and overloading of the air pump, are still pending to be resolved.
- a high speed circular knitting machine having a floss blowing and heat dissipating apparatus.
- the high speed circular knitting machine has a plurality of air vents to converge pressurized air to generate strong airflow to blow away the floss from those locations where the floss most likely accumulates such as the straddle seats, cylinder and needles.
- usage of the pressurized air can be reduced, and the life span of the airflow generator can be extended.
- Temperature generated due to friction between the cylinder troughs and needles is lower. An optimal cooling effect can be achieved.
- the floss blowing and heat dissipating apparatus for high speed circular knitting machines has a cylinder in a circular knitting machine rotating about a axis in the center.
- the cylinder has a plurality of needle troughs. Each needle trough holds a needle or a sinker.
- the cylinder is surrounded by a circular frame plate mounted onto a frame plate bracket and a plurality of straddle seats mounted onto a horizontal frame plate. Each of the straddle seats has a cam to guide and direct the needle to move up and down to perform a knitting operation.
- the floss blowing and heat dissipating apparatus includes an airflow generator to generate pressurized air which is delivered through an air directing hose, and a plurality of annular ducts located on the periphery of the cylinder and the straddle seats.
- the annular ducts have a passage with openings on two ends and a plurality of air vents close to the cylinder and the straddle seats.
- the air vents communicate with the passage.
- At least one air intake connector is provided to bridge the annular ducts to channel the pressurized air to the passage. Thereby the pressurized air can be ejected through the air vents and blow forcefully towards the straddle seats, cylinder and needles to carry away the floss and heat accumulated thereon.
- FIGS. 1 through 6 Please refer to FIGS. 1 through 6 for a first embodiment of a circular knitting machine having a floss blowing and heat dissipating apparatus according to the invention.
- the circular knitting machine 1 has a cylinder 16 which can rotate about a center axis.
- the cylinder 16 has a plurality of needle troughs 18, and each of the needle troughs 18 holds a needle 17 or a sinker (not shown in the drawings).
- the cylinder 16 is surrounded by a circular frame plate 13 mounted onto a frame plate bracket 12 and a plurality of straddle seats 11 mounted onto a horizontal frame plate 14.
- the frame plate bracket 12 is mounted onto a holding ring 15.
- Each of the straddle seats 11 has a cam (not shown in the drawings).
- the floss blowing and heat dissipating apparatus 10 includes an airflow generator 60 which may be a blower or an air pump to generate pressurized air to be delivered through an air directing hose 61, a plurality of annular ducts 20 which are located on the periphery of the cylinder 16 and straddle seats 11, and mounted beneath the circular frame plate 13 through an anchor rack 21.
- the annular ducts 20 have a passage 40 with two open ends.
- the annular ducts 20 close to the cylinder 16 and straddle seats 11 have a plurality of air vents 22 communicating with the passage 40.
- At least one air intake connector 30 is provided to bridge the annular ducts 20.
- the air intake connector 30 has an air inlet 31 to channel the pressurized air into the passage 40.
- the junctures of the air intake connector 30 and the annular ducts 20 have connection ports 32 and 33 that are coupled through a connection duct 50 (referring FIG. 4 ). Aside from connecting the annular ducts 20 through the air intake connector 30, they also may be coupled directly through the connection duct 50.
- the pressurized air can be ejected forcefully through the air vents 22 towards the straddle seats 11, cylinder 16 and needles 17 to carry away the accumulating floss and heat.
- the pressurized air ejected through the air vents 22 mainly is directed to an upper inclined surface of the straddle seats 11 so that the pressurized air can be diverted or refracted upwards towards the cylinder 16 and needles 17 to carry away the floss and heat accumulating on the straddle seats 11, cylinder 16 and needles 17.
- FIG. 8 for a second embodiment which serves to improve the understanding of the invention.
- the embodiment differs from the first embodiment in that the air inlet 31 is formed directly on one annular duct 20, and in that the annular ducts 20 are coupled tightly by a connection duct 50. Hence the pressurized air can be ejected forcefully through the air vents 22 towards the straddle seats 11, cylinder 16 and needles 17 to carry away the floss and heat accumulating thereon.
- FIG. 9 for a third embodiment which serves to improve the understanding of the invention.
- This embodiment differs from the first embodiment in that only one annular duct 20 is provided beneath the circular frame plate 13.
- the annular duct 20 also has an air inlet 31 to channel the pressurized air to the air vents 22 for ejection forcefully towards the straddle seats 11, cylinder 16 and needles 17 to carry away the floss and heat accumulating thereon.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
- The present invention relates to a high speed circular knitting machine having a floss blowing and heat dissipating apparatus according to the preamble of claim 1.
- Operation of a conventional circular knitting machine generally includes the steps of yarn supplying, knitting and fabric winding. During knitting operation the cylinder rotates about the center of the circular knitting machine. There are cams surrounding the cylinder that have tracks to direct needles located in the needle troughs of the cylinder to move up and down. Meanwhile sinkers are moved forwards in correspondance to the needles to proceed with the knitting operation. In order to smooth the knitting operation, the supplying yarns must be stretched tightly. The yarns often generate lint or floss during operations of yarn sinking, yarn directing and yarn feeding. If the floss is not removed, it tends to clog various elements of the circular knitting machine and affect the smoothness of knitting operation, and even shorten the life span of the circular knitting machine. Moreover, if the floss and the yarns are woven into the fabric, fabric defects are formed and fabric quality is impacted. In addition, during knitting operation, constant friction occurs between the needles and the troughs of the cylinder, and a high temperature over 90 degrees centigrade is often generated. Such a high temperature causes heat expansion that affects operation of various elements. The yarns also could not withstand such a high temperature, which results in yarn rupturing and defective finished products.
- To remedy the aforesaid problems, many floss blowing or heat dissipating apparatus have been developed. For instance,
U.S. patent No. 5,737,942 entitled "MEANS FOR DETERRING LINT AND DEBRIS ACCUMULATION ON THE KNITTING ELEMENTS OF A CIRCULAR KNITTING MACHINE" has a curved plate interposed between a horizontal frame plate and a circular frame plate and a straddle seat to form an air chamber. Through an air pump and an air supply hose, pressurized air is delivered into the air chamber. The pressurized air is dispersed naturally to the cylinder and other elements through an annular gap formed between the straddle seat and the circular frame plate to blow away the floss and achieve a cooling effect. While the conventional technique mentioned above can blow away the floss and disperse heat, it still has drawbacks remained to be overcome, notably the pressurized air has to fill the air chamber before blowing to the cylinder through the annular gap above the straddle seat. As the air chamber is closed on three sides and open on an upper side (the upper side of the straddle seat being open), the pressurized air is dispersed through the gap above the straddle seat and lost before the air chamber is filled. Hence the effect of floss blowing and cooling is not desirable. The air pump has to be operated at the maximum capacity to generate more pressurized air faster to achieve the desired result. This causes overloading of the air pump. When the circular knitting machine is operated over a long period of time, overloading of the air pump generates high temperature and shortens the lift span. Therefore it takes a higher cost to meet the purpose of floss blowing and cooling. This does not make economic sense. - Another
U.S. patent No. 6,199,408 entitled "Cooling apparatus for knitting components" includes a cover located between an intermediate ring and a lower ring, and a cylindrical chamber formed between a needle-selecting actuator and the cover. There is a ventilator fan located on the cover to draw external air into the chamber. Channeling by an opening of the chamber enables dispelling heat generated on the cylinder and the surrounding operation elements. However, it also has the same drawbacks asU.S. patent No. 5,737,942 , but fares even worse in terms of the effect of floss blowing and cooling effect. All the problems of the conventional techniques, such as poor floss blowing and cooling effect, and overloading of the air pump, are still pending to be resolved. -
DE 32 19 467 A1 discloses a circular knitting machine according to the preamble of claim 1. Despite various efforts in the prior art, there still exists a need to further improve the floss blowing and cooling effect of circular knitting machines. - It is an object of the present invention to provide a high speed circular knitting machine according to the preamble of claim 1, having an improved floss blowing and cooling effect.
- According to the present invention there is provided a high speed circular knitting machine having a floss blowing and heat dissipating apparatus. The high speed circular knitting machine has a plurality of air vents to converge pressurized air to generate strong airflow to blow away the floss from those locations where the floss most likely accumulates such as the straddle seats, cylinder and needles. Thereby usage of the pressurized air can be reduced, and the life span of the airflow generator can be extended. Temperature generated due to friction between the cylinder troughs and needles is lower. An optimal cooling effect can be achieved.
- To achieve the foregoing object, the floss blowing and heat dissipating apparatus for high speed circular knitting machines according to the invention has a cylinder in a circular knitting machine rotating about a axis in the center. The cylinder has a plurality of needle troughs. Each needle trough holds a needle or a sinker. The cylinder is surrounded by a circular frame plate mounted onto a frame plate bracket and a plurality of straddle seats mounted onto a horizontal frame plate. Each of the straddle seats has a cam to guide and direct the needle to move up and down to perform a knitting operation. The floss blowing and heat dissipating apparatus includes an airflow generator to generate pressurized air which is delivered through an air directing hose, and a plurality of annular ducts located on the periphery of the cylinder and the straddle seats. The annular ducts have a passage with openings on two ends and a plurality of air vents close to the cylinder and the straddle seats. The air vents communicate with the passage. At least one air intake connector is provided to bridge the annular ducts to channel the pressurized air to the passage. Thereby the pressurized air can be ejected through the air vents and blow forcefully towards the straddle seats, cylinder and needles to carry away the floss and heat accumulated thereon.
- The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
-
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FIG. 1 is a plane view of the invention installed on a high speed circular knitting machine. -
FIG. 2 is a fragmentary perspective view of a first embodiment of the invention. -
FIG. 3 is another fragmentary perspective view of the first embodiment of the invention viewing from another angle. -
FIG. 4 is a fragmentary perspective view of the first embodiment of the invention showing the air intake connector and the annular duct in a connecting condition. -
FIG. 5 is a fragmentary sectional view of the first embodiment of the invention showing the annular duct and surrounding facilities. -
FIG. 6 is a fragmentary sectional view of the first embodiment of the invention showing the fastening structure of the annular duct. -
FIG. 7 is a fragmentary sectional view of the first embodiment of the invention showing air intake and air ejection of the annular duct. -
FIG. 8 is a fragmentary perspective view of a second embodiment serving to improve an understanding of the invention. -
FIG. 9 is a fragmentary perspective view of a third embodiment serving to improve an understanding of the invention. - Please refer to
FIGS. 1 through 6 for a first embodiment of a circular knitting machine having a floss blowing and heat dissipating apparatus according to the invention. The circular knitting machine 1 has acylinder 16 which can rotate about a center axis. Thecylinder 16 has a plurality ofneedle troughs 18, and each of theneedle troughs 18 holds aneedle 17 or a sinker (not shown in the drawings). Thecylinder 16 is surrounded by acircular frame plate 13 mounted onto aframe plate bracket 12 and a plurality ofstraddle seats 11 mounted onto ahorizontal frame plate 14. Theframe plate bracket 12 is mounted onto a holdingring 15. Each of the straddle seats 11 has a cam (not shown in the drawings). When thecylinder 16 rotates, the cam drives theneedle 17 up and down to perform a knitting operation. The floss blowing andheat dissipating apparatus 10 includes anairflow generator 60 which may be a blower or an air pump to generate pressurized air to be delivered through anair directing hose 61, a plurality ofannular ducts 20 which are located on the periphery of thecylinder 16 and straddleseats 11, and mounted beneath thecircular frame plate 13 through ananchor rack 21. Theannular ducts 20 have apassage 40 with two open ends. Theannular ducts 20 close to thecylinder 16 and straddleseats 11 have a plurality ofair vents 22 communicating with thepassage 40. At least oneair intake connector 30 is provided to bridge theannular ducts 20. Theair intake connector 30 has anair inlet 31 to channel the pressurized air into thepassage 40. The junctures of theair intake connector 30 and theannular ducts 20 haveconnection ports 32 and 33 that are coupled through a connection duct 50 (referringFIG. 4 ). Aside from connecting theannular ducts 20 through theair intake connector 30, they also may be coupled directly through theconnection duct 50. By means of the construction set forth above, the pressurized air can be ejected forcefully through the air vents 22 towards the straddle seats 11,cylinder 16 andneedles 17 to carry away the accumulating floss and heat. - Refer to
FIG. 7 for air intake and ejection of the annular ducts in the first embodiment. The pressurized air ejected through the air vents 22 mainly is directed to an upper inclined surface of the straddle seats 11 so that the pressurized air can be diverted or refracted upwards towards thecylinder 16 andneedles 17 to carry away the floss and heat accumulating on the straddle seats 11,cylinder 16 and needles 17. - Refer to
FIG. 8 for a second embodiment which serves to improve the understanding of the invention. The embodiment differs from the first embodiment in that theair inlet 31 is formed directly on oneannular duct 20, and in that theannular ducts 20 are coupled tightly by aconnection duct 50. Hence the pressurized air can be ejected forcefully through the air vents 22 towards the straddle seats 11,cylinder 16 andneedles 17 to carry away the floss and heat accumulating thereon. - Refer to
FIG. 9 for a third embodiment which serves to improve the understanding of the invention. This embodiment differs from the first embodiment in that only oneannular duct 20 is provided beneath thecircular frame plate 13. Theannular duct 20 also has anair inlet 31 to channel the pressurized air to the air vents 22 for ejection forcefully towards the straddle seats 11,cylinder 16 andneedles 17 to carry away the floss and heat accumulating thereon. - While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
Claims (6)
- A high speed circular knitting machine having a floss blowing and heat dissipating apparatus, said high speed circular knitting machine (1) having a cylinder (16) rotating about a center axis, the cylinder (16) having a plurality of needle troughs each holding a needle (17) or a sinker, and being surrounded by a circular frame plate (13) mounted onto a frame plate bracket (12) and a plurality of straddle seats (11) mounted onto a horizontal frame plate (14), each of the straddle seats (11) having a cam to drive the needle (17) up and down while the cylinder (16) rotates to perform knitting operation, said floss blowing and heat dissipating apparatus comprising:an airflow generator (60) to generate pressurized air which is delivered through an air directing hose (61); anda plurality of annular ducts (20) which are located on the periphery of the cylinder (16) and the straddle seats (11) and have a passage (40) which has two open ends, and have a plurality of air vents (22) on the annular ducts (20) close to the cylinder (16) and the straddle seats (11) communicating with the passage (40);characterized in that said floss blowing and dissipating apparatus further comprises at least one air intake connector (30) bridging the annular ducts (20) and having an air inlet (31) to channel the pressurized air to the passage (40);
wherein the pressurized air is ejected through the air vents (22) to blow forcefully towards the straddle seats (11), the cylinder (16) and the needle (17) to carry away floss and heat accumulating thereon. - The high speed circular knitting machine having a floss blowing and heat dissipating apparatus of claim 1,
wherein the air intake connector (30) and the annular ducts (20) are coupled through a connection duct (50). - The high speed circular knitting machine having a floss blowing and heat dissipating apparatus of claim 1,
wherein the annular ducts (20) are coupled through a connection duct (50). - The high speed circular knitting machine having a floss blowing and heat dissipating apparatus of any of the preceding claims, wherein the pressurized air ejected through the air vents (22) is directed to an upper inclined surface of the straddle seats (11) so that the pressurized air is diverted upwards towards the cylinder (16) and the needle (17) to carry away the floss and heat accumulating thereon.
- The high speed circular knitting machine having a floss blowing and heat dissipating apparatus of any of the preceding claims, wherein the annular ducts (20) are mounted beneath the circular frame plate (13) through an anchor rack (21).
- The high speed circular knitting machine having a floss blowing and heat dissipating apparatus of any of the preceding claims, wherein the airflow generator (60) is selectively a blower or an air pump.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602006010394T DE602006010394D1 (en) | 2006-09-29 | 2006-09-29 | High speed circular knitting machine with a fiber waste air blowing and heat dissipation device |
EP06121568A EP1905876B1 (en) | 2006-09-29 | 2006-09-29 | High speed circular knitting machine with a floss blowing and heat dissipating apparatus |
AT06121568T ATE448344T1 (en) | 2006-09-29 | 2006-09-29 | HIGH SPEED CIRCULAR KNITTING MACHINE WITH A FIBER WASTE AIR BLOWING AND HEAT DISSIPATION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06121568A EP1905876B1 (en) | 2006-09-29 | 2006-09-29 | High speed circular knitting machine with a floss blowing and heat dissipating apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1905876A1 EP1905876A1 (en) | 2008-04-02 |
EP1905876B1 true EP1905876B1 (en) | 2009-11-11 |
Family
ID=37497874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06121568A Not-in-force EP1905876B1 (en) | 2006-09-29 | 2006-09-29 | High speed circular knitting machine with a floss blowing and heat dissipating apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1905876B1 (en) |
AT (1) | ATE448344T1 (en) |
DE (1) | DE602006010394D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114351346A (en) * | 2022-01-17 | 2022-04-15 | 信泰(福建)科技有限公司 | Directional constant temperature equipment of weaving and equipment of weaving |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD159439B1 (en) * | 1981-06-04 | 1986-08-13 | Dieter Rothe | DEVICE FOR DISCHARGING DUST AND FLUES FOR KNITTING MACHINES, ESPECIALLY CIRCULAR KNITTING MACHINES |
US5737942A (en) * | 1996-07-03 | 1998-04-14 | Alandale Industries, Inc. | Means for deterring lint and debris accumulation on the knitting elements of a circular knitting machine |
JP2000008258A (en) * | 1998-06-16 | 2000-01-11 | Precision Fukuhara Works Ltd | Cooling device for knitting part |
DE102004049001A1 (en) * | 2004-10-06 | 2006-04-13 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Circular knitting machine with a dedusting device |
-
2006
- 2006-09-29 DE DE602006010394T patent/DE602006010394D1/en active Active
- 2006-09-29 EP EP06121568A patent/EP1905876B1/en not_active Not-in-force
- 2006-09-29 AT AT06121568T patent/ATE448344T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP1905876A1 (en) | 2008-04-02 |
ATE448344T1 (en) | 2009-11-15 |
DE602006010394D1 (en) | 2009-12-24 |
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