EP0704400A2 - Improved bobbin carrier mandrel in a collection unit for continuous filament yarn - Google Patents
Improved bobbin carrier mandrel in a collection unit for continuous filament yarn Download PDFInfo
- Publication number
- EP0704400A2 EP0704400A2 EP95202520A EP95202520A EP0704400A2 EP 0704400 A2 EP0704400 A2 EP 0704400A2 EP 95202520 A EP95202520 A EP 95202520A EP 95202520 A EP95202520 A EP 95202520A EP 0704400 A2 EP0704400 A2 EP 0704400A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- tubular body
- bobbin carrier
- continuous filament
- projecting
- 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.)
- Withdrawn
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D7/00—Collecting the newly-spun products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/40—Arrangements for rotating packages
- B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
- B65H54/543—Securing cores or holders to supporting or driving members, e.g. collapsible mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- This invention relates to a bobbin carrier mandrel projecting from a high speed yarn collection unit in continuous filament spinning plants, its projecting part being in the form of a single load-bearing external tubular body rigidly connected at its end to a positive drive.
- the yarns leave the spinneret at various speeds, which are always high.
- the productivity of the production processes and the efficiency of the operational equipment considerably affect market competitiveness.
- This also includes improved machine construction, ie by providing a machine of improved quality or greater technological content.
- the basic constituent members of the collection unit are a bracket-like support beam, which carries the presser roller and the yarn traversing system, the presser roller itself and the mandrel carrying the bobbins on which the yarn is wound.
- the mandrel To perform its task, the mandrel must be able to clamp the tubes of the bobbins on which the yarn is wound, rotate them at the required speed, and finally enable the bobbins to be removed.
- the mandrel being that rotating member which supports the tubes and rotates them at the appropriate peripheral speed, hence the mandrel must have a free end.
- the outer diameter of the mandrel is determined by the inner diameter of the tubes, which are commercial elements constructed preferably of cardboard or plastic, and hence do not possess high dimensional precision. As the mandrel rotates at high speed it generates dynamic vibration, which compromises the life of the entire collection unit.
- the problem of the mandrel is its mass, in particular the inertial mass related to dynamic vibration.
- the primary objective of the present invention is to provide a mandrel arrangement which is improved by virtue of the following constructional and operational aspects:
- An object of the invention is hence to provide a mandrel of simplified construction and perfect operation in particular at high speed, leading to better performance.
- the projecting bobbin carrier part comprises, in coordinated cooperation:
- 1 is the mandrel driver shaft of the known art
- 2 is the element or block means arranged to move radially to clamp or unclamp the tubes 5 mounted one after another on the mandrel
- 3 is the single external tubular body of the projecting part of the bobbin carrier mandrel, said body being made rigid with the shaft 1 by screw or similar means 10.
- the tubular body 3 is advantageously of light composite material or carbon fibre; 4 are the inclined surfaces provided in limited regions in the surface of the tubular element 6. Said inclined surfaces 4 are provided at each hole present in the tubular body 3. Each hole and inclined surface 4 cooperate operationally with the block 2 and are distributed uniformly at uniform distance apart in the tubular body and tubular element 3 and 6; 7 is the outline of the bobbins under formation on the mandrel of the collection unit. Said bobbins 7 form on the tubes 5 clamped on the body 3 by the blocks 2, which emerge from the outer surface of the body 3 to press against the inner surface of the tubes 5; 6 is the tubular element inserted into and slidingly coupled to the tubular body 3.
- the mandrel operation comprises the following operational stages: operating the actuator 12 so that its piston 9 causes a small but sufficient axial movement of the tubular element 6, which compresses the helical spring 8. Because of the provision of the inclined surfaces 4, the blocks 2 move radially into substantial alignment with the outer circumferential surface of the tubular body 3; mounting the tubes 5 by drawing them one after another along the tubular body 3 forming the load-bearing part of the improved mandrel of the present invention.
- the tubes 5 can be moved axially along the tubular body 3 because the blocks 2 are able to move radially towards the interior of the tubular body 3, and hence do not form an obstacle; clamping the mutually adjacent tubes 5 by deactivating the actuator 12, which by retracting its piston 9 allows the spring 8 to exert its thrust action and extend to axially shift the tubular element 6 so that, via the inclined surfaces 4, the blocks 2 emerge radially from the outer surface of the tubular body 3 to clamp the tubes 5, which hence become rigid with the mandrel, ie with the tubular body 3; activating the collection unit in known manner to wind the yarn onto the tubes 5 rotating at constant peripheral speed.
- bobbins 7 By moving the yarn along the lateral surface of the tubes (traversing), bobbins 7 form filled with wound yarn to a predetermined final diameter, as is well known to the expert of the art. When the bobbins 7 reach their final diameter, the mandrel ceases to rotate, in accordance with known operational procedures;
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Winding Filamentary Materials (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
Description
- This invention relates to a bobbin carrier mandrel projecting from a high speed yarn collection unit in continuous filament spinning plants, its projecting part being in the form of a single load-bearing external tubular body rigidly connected at its end to a positive drive.
- Continuous filament spinning plants for producing synthetic yarns of various kinds are known.
- The yarns leave the spinneret at various speeds, which are always high. The productivity of the production processes and the efficiency of the operational equipment considerably affect market competitiveness.
- As a result, such industries continuously seek improved performance from their machines and equipment, at the lowest possible cost but with an acceptable reliability. The search for improved performance is directed towards incisive improvement of all the constituent components and devices of the machine in all its aspects.
- This also includes improved machine construction, ie by providing a machine of improved quality or greater technological content.
- As is well known to the expert of the art, in continuous filament spinning plants the operational reliability and efficiency of the collection units are of considerable importance. Said units wind the synthetic yarn, originating at high speed from a spinneret, onto bobbins such that it can then be stored for use in subsequent stages of textile manufacture.
- In addition to the machine base, the drive unit and the lubrication and control units, the basic constituent members of the collection unit are a bracket-like support beam, which carries the presser roller and the yarn traversing system, the presser roller itself and the mandrel carrying the bobbins on which the yarn is wound.
- In such a construction the task of greatest severity falls on the mandrel. To perform its task, the mandrel must be able to clamp the tubes of the bobbins on which the yarn is wound, rotate them at the required speed, and finally enable the bobbins to be removed.
- The limits imposed on the mandrel design are of geometrical and kinematic nature.
- To achieve the aforegoing requirements it must firstly be possible to mount the tubes on the mandrel, the mandrel being that rotating member which supports the tubes and rotates them at the appropriate peripheral speed, hence the mandrel must have a free end.
- The outer diameter of the mandrel is determined by the inner diameter of the tubes, which are commercial elements constructed preferably of cardboard or plastic, and hence do not possess high dimensional precision. As the mandrel rotates at high speed it generates dynamic vibration, which compromises the life of the entire collection unit.
- Hence the problem of the mandrel is its mass, in particular the inertial mass related to dynamic vibration.
- To reduce the mass of this mandrel the applicant has both improved its principle of operation by seeking to reduce the mass by means of a different design, and has used light materials. The mandrel described and claimed in the present invention has surprisingly resulted in an improved and more rational geometry of the collection unit together with an improved unit operating performance, to achieve an operational life of the unit which has so far been unachievable.
- The mandrels of currently known collection units operating in continuous filament spinning plants provide precarious operating performance especially at high yarn collection speed. They also have certain drawbacks which make their construction and assembly difficult, leading to a consequent high manufacturing cost. These drawbacks derive mainly from the following aspects:
- use of material of high inertial mass;
- a large number of elements and devices in the expansion system;
- limited bearing life because of substantial dynamic vibration;
- high cost of machining work on the mandrel and on the expansion system;
- high assembly cost because of the mandrel complexity;
- poor facility for inspection and maintenance inside the mandrel;
- low collection speed.
- In view of these defects and drawbacks connected with current mandrels of the state of the art, the primary objective of the present invention is to provide a mandrel arrangement which is improved by virtue of the following constructional and operational aspects:
- use of material of low inertial mass;
- low wear because of reduced and hence uninfluential dynamic vibration;
- low cost of machining work on the mandrel and on the expansion system;
- substantial reduction in assembly cost;
- greater facility for inspection and maintenance inside the mandrel;
- high collection speed.
- An object of the invention is hence to provide a mandrel of simplified construction and perfect operation in particular at high speed, leading to better performance.
- This and further objects are all attained by the improved mandrel of the present invention, wherein the projecting bobbin carrier part comprises, in coordinated cooperation:
- a single external tubular body rigidly connected at its end to a positive drive and carrying a plurality of holes distributed regularly over its circumferential surface to allow the emergence of blocks for clamping the tubes mounted one after another along said external tubular body, this latter being constructed of light composite material such as laminates of steel and aluminium or any other composition, or carbon fibre;
- at least one tubular element inserted into and slidingly coupled to said external tubular body and carrying a plurality of limited inclined surface regions cooperating with the clamping blocks, which emerge or withdraw from the outer surface of the tubular body via the holes distributed uniformly in it with uniform spacing, said tubular element extending axially within the tubular body for a length corresponding at least to the axial length of the entire pack of tubes mounted mutually adjacent on the outside of the projecting mandrel;
- block means of appropriate shape, each arranged to cooperate with an individual hole and with the individual underlying inclined surface in order to clamp the tubes by making them rigid in the manner of a single body with the mandrel, which rotates them at the peripheral speed required to wind the continuous filament spun yarn fed by the overlying spinnerets.
- With reference to the aforesaid the accompanying drawing shows a preferred embodiment, which is neither binding nor limiting in terms of the mutual positioning of the components and the consequent simplifications which may derive therefrom; said embodiment is described hereinafter with reference to the accompanying figures:
- Figure 1 is a partly sectional axial schematic view showing the load-bearing external tubular body of the projecting part with an outline indication of the bobbins of wound yarn, said figure also showing the internal tubular element and the base of the machine represented by the collection unit:
- Figure 2 is an enlarged schematic axial section through a projecting part of the bobbin carrier mandrel, said figure showing the block means which cooperate with a hole in the tubular body and with the inclined surface of the internal tubular element.
- Those parts not relevant to the invention are omitted from the figures, such as the drive unit, the bracket-like support beam carrying the presser roller and the yarn traversing system together with other parts, as these are known and do not concern the improvement according to the present invention. In the figures, identical parts or those of identical or equivalent function carry the same reference numerals. In these:
1 is the mandrel driver shaft of the known art; 2 is the element or block means arranged to move radially to clamp or unclamp thetubes 5 mounted one after another on the mandrel; 3 is the single external tubular body of the projecting part of the bobbin carrier mandrel, said body being made rigid with the shaft 1 by screw or similar means 10. Thetubular body 3 is advantageously of light composite material or carbon fibre; 4 are the inclined surfaces provided in limited regions in the surface of thetubular element 6. Saidinclined surfaces 4 are provided at each hole present in thetubular body 3. Each hole andinclined surface 4 cooperate operationally with theblock 2 and are distributed uniformly at uniform distance apart in the tubular body andtubular element bobbins 7 form on thetubes 5 clamped on thebody 3 by theblocks 2, which emerge from the outer surface of thebody 3 to press against the inner surface of thetubes 5; 6 is the tubular element inserted into and slidingly coupled to thetubular body 3. Its limited sliding is achieved by the action of the piston 9 of anactuator 12, preferably pneumatic, acting against the end flange of thetubular element 6, which moves on overcoming the thrusting action of thespring 8 acting against the flange at the other end of thetubular element 6; 11 is the frame of the machine represented by the collection unit. - The operation of the improved bobbin carrier mandrel of the present invention is easily understood.
- The mandrel operation comprises the following operational stages: operating the
actuator 12 so that its piston 9 causes a small but sufficient axial movement of thetubular element 6, which compresses thehelical spring 8. Because of the provision of theinclined surfaces 4, theblocks 2 move radially into substantial alignment with the outer circumferential surface of thetubular body 3;
mounting thetubes 5 by drawing them one after another along thetubular body 3 forming the load-bearing part of the improved mandrel of the present invention. Thetubes 5 can be moved axially along thetubular body 3 because theblocks 2 are able to move radially towards the interior of thetubular body 3, and hence do not form an obstacle;
clamping the mutuallyadjacent tubes 5 by deactivating theactuator 12, which by retracting its piston 9 allows thespring 8 to exert its thrust action and extend to axially shift thetubular element 6 so that, via theinclined surfaces 4, theblocks 2 emerge radially from the outer surface of thetubular body 3 to clamp thetubes 5, which hence become rigid with the mandrel, ie with thetubular body 3;
activating the collection unit in known manner to wind the yarn onto thetubes 5 rotating at constant peripheral speed. - By moving the yarn along the lateral surface of the tubes (traversing),
bobbins 7 form filled with wound yarn to a predetermined final diameter, as is well known to the expert of the art. When thebobbins 7 reach their final diameter, the mandrel ceases to rotate, in accordance with known operational procedures; - activating the
actuator 12, the piston 9 of which causes thetubular element 6 to undergo a sufficient axial movement to compress thespring 2. Because of the presence of theinclined surfaces 4 theblocks 2 are free to retract and hence unclamp thetubes 5 filled with wound yarn; - withdrawing and removing the
bobbins 7 from the mandrel and mounting newempty tubes 5 one after another on thetubular body 3, which forms the load-bearing part of the improved mandrel according to the present invention; - then repeating the aforedescribed operating cycle.
- It is apparent that variations, modifications and additions can be made to the details of the improved mandrel of the invention by the expert of the art, without leaving the scope of the present invention.
Claims (3)
- An improved bobbin carrier mandrel projecting from a high speed yarn collection unit in continuous filament spinning plants, characterised in that the projecting bobbin carrier part comprises, cooperating coordinatedly:- a single external tubular body rigidly connected at its end to a positive drive and carrying a plurality of holes distributed regularly over its circumferential surface to allow the emergence of blocks for clamping the tubes mounted one after another along said external tubular body;- at least one tubular element inserted into and slidingly coupled to said external tubular body and carrying a plurality of limited inclined surface regions cooperating with the clamping blocks, which emerge or withdraw from the outer surface of the tubular body via the holes distributed uniformly in it with uniform spacing, said tubular element extending axially within the tubular body for a length corresponding at least to the axial length of the entire pack of tubes mounted mutually adjacent on the outside of the projecting mandrel;- block means of appropriate shape, each arranged to cooperate with an individual hole and with the individual underlying inclined surface in order to clamp the tubes by making them rigid in the manner of a single body with the mandrel, which rotates them at the peripheral speed required to wind the continuous filament spun yarn fed by the overlying spinnerets.
- An improved bobbin carrier mandrel projecting from a continuous filament yarn collection unit as claimed in claim 1, characterised in that the external tubular body is of carbon fibre.
- An improved bobbin carrier mandrel projecting from a continuous filament yarn collection unit as claimed in claim 1, characterised in that the external tubular body is of light composite material such as laminates of steel and aluminium or any other composition of low inertial mass.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI941956A IT1270018B (en) | 1994-09-27 | 1994-09-27 | SPINDLE HOLDER SPINDLE PERFECTED BY A GROUP OF CONTINUOUS FLUSH WIRE COLLECTION |
ITMI941956 | 1994-09-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0704400A2 true EP0704400A2 (en) | 1996-04-03 |
EP0704400A3 EP0704400A3 (en) | 1996-08-14 |
Family
ID=11369600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95202520A Withdrawn EP0704400A3 (en) | 1994-09-27 | 1995-09-18 | Improved bobbin carrier mandrel in a collection unit for continuous filament yarn |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0704400A3 (en) |
JP (1) | JPH08310725A (en) |
KR (1) | KR960010917A (en) |
CN (1) | CN1128238A (en) |
IT (1) | IT1270018B (en) |
TR (1) | TR199501173A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0768270A2 (en) * | 1995-10-13 | 1997-04-16 | NEUMAG - Neumünstersche Maschinen- und Anlagenbau GmbH | Bobbin holder for the one bobbin or more bobbins arranged one behind the other |
US7007886B2 (en) | 2001-12-22 | 2006-03-07 | Saurer Gmbh & Co. Kg | Yarn winding spindle |
US7210648B2 (en) * | 2004-09-28 | 2007-05-01 | Catalyst Paper Corporation | Disposable/reusable core adapters |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115350922B (en) * | 2022-10-21 | 2023-01-17 | 海南大学三亚南繁研究院 | Plastic bag clearance mechanism and fertilizer screening equipment are divided to fertilizer screening |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3030039A (en) * | 1955-12-15 | 1962-04-17 | American Viscose Corp | Dual yarn winding apparatus |
US3593934A (en) * | 1968-07-29 | 1971-07-20 | Celanese Corp | High speed bobbin chuck |
DD153487A3 (en) * | 1980-02-21 | 1982-01-13 | Lutz Brenner | HUELSENSPANNVORRICHTUNG FOR MULTI-SPULENT TRAEGER |
DE3044707A1 (en) * | 1980-11-27 | 1982-06-24 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Winding-frame spindle with package-tube clamping pins - movable radially by longitudinal displacement of wedge=shaped elements |
DE3644789C1 (en) * | 1986-12-31 | 1988-06-23 | Sundwiger Eisen Maschinen | Winding drum for strips |
US4978082A (en) * | 1988-03-29 | 1990-12-18 | Teijin Seiki Co., Ltd. | Bobbin holder |
-
1994
- 1994-09-27 IT ITMI941956A patent/IT1270018B/en active IP Right Grant
-
1995
- 1995-09-18 EP EP95202520A patent/EP0704400A3/en not_active Withdrawn
- 1995-09-25 KR KR1019950031554A patent/KR960010917A/en not_active Application Discontinuation
- 1995-09-26 CN CN95118655A patent/CN1128238A/en active Pending
- 1995-09-26 TR TR95/01173A patent/TR199501173A2/en unknown
- 1995-09-27 JP JP7272108A patent/JPH08310725A/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0768270A2 (en) * | 1995-10-13 | 1997-04-16 | NEUMAG - Neumünstersche Maschinen- und Anlagenbau GmbH | Bobbin holder for the one bobbin or more bobbins arranged one behind the other |
EP0768270A3 (en) * | 1995-10-13 | 1997-09-03 | Neumag Gmbh | Bobbin holder for the one bobbin or more bobbins arranged one behind the other |
US7007886B2 (en) | 2001-12-22 | 2006-03-07 | Saurer Gmbh & Co. Kg | Yarn winding spindle |
US7210648B2 (en) * | 2004-09-28 | 2007-05-01 | Catalyst Paper Corporation | Disposable/reusable core adapters |
US7481392B2 (en) | 2004-09-28 | 2009-01-27 | Catalyst Paper Corporation | Disposable/reusable core adapters |
US7523536B2 (en) | 2004-09-28 | 2009-04-28 | Catalyst Paper Corporation | Disposable/reusable core adapters |
US7536763B2 (en) | 2004-09-28 | 2009-05-26 | Catalyst Paper Corporation | Disposable/reusable core adapters |
Also Published As
Publication number | Publication date |
---|---|
IT1270018B (en) | 1997-04-16 |
JPH08310725A (en) | 1996-11-26 |
ITMI941956A1 (en) | 1996-03-27 |
CN1128238A (en) | 1996-08-07 |
KR960010917A (en) | 1996-04-20 |
TR199501173A2 (en) | 1996-06-21 |
ITMI941956A0 (en) | 1994-09-27 |
EP0704400A3 (en) | 1996-08-14 |
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