CN104914128A - Device for testing chemical fiber filament heat shrinkage rate and testing method thereof - Google Patents
Device for testing chemical fiber filament heat shrinkage rate and testing method thereof Download PDFInfo
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- CN104914128A CN104914128A CN201510401095.2A CN201510401095A CN104914128A CN 104914128 A CN104914128 A CN 104914128A CN 201510401095 A CN201510401095 A CN 201510401095A CN 104914128 A CN104914128 A CN 104914128A
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Abstract
The invention relates to a device for testing a chemical fiber filament heat shrinkage rate and a testing method thereof, wherein the device for testing the chemical fiber filament heat shrinkage rate comprises a dual-limit device structure and a force testing sensor, the dual-limit device structure comprises an upper hook, a lower hook, an upper hook disc, an upper limit device, a lower hook disc, a lower limit device and metal wires, the upper hook disc can be supported to upwardly move by arranging the force testing sensor and a toggle mechanism which is connected with the force testing sensor, the lower hook disc upwardly moves to the lower limit device to be blocked and stop moving, the upper hook disc goes on to go up and applies tension to a twisted wire sample, the force testing sensor bears loads in the downward direction, an instrument automatically tests the length values of the twisted wire sample in preset standard tension before and after heating, thereby testing heat shrinkage rate of chemical fiber filaments. The device for testing the chemical fiber filament heat shrinkage rate and the testing method thereof obviously improve testing precision of the heat shrinkage rate of chemical fiber filament samples, is convenient to demarcate and correct a force testing system, is reliable in structure, and greatly reduces fault rate.
Description
Technical field
The invention belongs to textile chemical fiber surveying instrument field, particularly a kind of proving installation of chemical-fibres filaments percent thermal shrinkage and method of testing thereof, it is applicable to the quality control of chemical fibre mill and textile enterprise, testing agency to the inspection of fiber quality.
Background technology
The percent thermal shrinkage of chemical-fibres filaments is one of major parameter characterizing fibre structure and character, is to be shaped with chemical-fibres filaments and an integrated performance index that the process such as aftertreatment is relevant, its sign product aftertreatment and product take in dimensional stability.The percent thermal shrinkage of chemical-fibres filaments and postfinishing process, product dyeability have this substantial connection, directly affect wearability of fabric and appearance.Therefore, percent thermal shrinkage method of testing and the device thereof of studying chemical-fibres filaments are of great significance.
The measuring method of the percent thermal shrinkage of chemical-fibres filaments, to measure the length of chemical-fibres filaments before certain pre-set criteria heated under tension and the length after heat shrink respectively, ask for the shrinkage factor value of tested chemical-fibres filaments according to its length difference divided by the length before heating, after measuring some samples, automatically calculate sample mean percent thermal shrinkage and the coefficient of variation.According to sample testing, test chemical-fibres filaments percent thermal shrinkage method requires that difference has baking oven heating and boiling water thermal shrinkage method, single method or hank knotting method is had according to test sample difference, for the measuring method of specimen length before and after heating, mostly domesticly be manual method, start in recent years to adopt instrument.The TEXTURMAT ME type chemical-fibres filaments that instrument measuring method is produced with German Textechno company abroad crispaturas rate tester for this instrument of representative employing hank knotting method sample, chemical-fibres filaments rate test of crispaturaing is tested be incorporated on an instrument with percent thermal shrinkage, the former requires that dynamometry load is large, the latter requires that dynamometry load is little, and both share the precision that an instrument unavoidably reduces chemical-fibres filaments thermal shrinkage test result.The product that only need do percent thermal shrinkage test in chemical-fibres filaments and do not need to carry out crispaturaing rate test is more not suitable for.In addition, this instrument is fixed for hank knotting sample upper end in dynamometry mode, force cell moves down and inserts above lower hook dish, afterburning downwards to hank knotting sample, measurement is the length of hank knotting sample at some tension, this measuring method force cell is stressed is by downwards lower, demarcates calibration bring difficulty to instrument force value, and not only affecting its measuring accuracy also makes troubles to operation use.In addition, this instrument hank knotting sample is girth 1 meter, and length 500mm after hanging, instrument is bulky, expensive.The YG368 type full automatic filament crimp contraction tester that recent year is produced is the instrument of the above-mentioned type product copying Germany substantially, there is similar technology problem.Therefore, according to domestic chemical-fibres filaments production development, be exclusively used in the test of chemical-fibres filaments percent thermal shrinkage in the urgent need to one, change above-mentioned instrument dynamometry mode, instrument volume is little, the chemical-fibres filaments thermal shrinkage tester that measuring accuracy is high, the fundamental purpose of this patent research and development that Here it is.
Summary of the invention
The object of the present invention is to provide a kind of proving installation and method of testing thereof of chemical-fibres filaments percent thermal shrinkage, mainly solve the defect existing for above-mentioned prior art, adopt this method of testing and proving installation significantly and improve the measuring accuracy of chemical-fibres filaments sample percent thermal shrinkage, dynamometer system calibration calibration is convenient, structure is more reliable, and failure rate greatly reduces; But also contribute to the reduction of device volume.
For achieving the above object, technical scheme of the present invention is:
A proving installation for chemical-fibres filaments percent thermal shrinkage, is characterized in that: it comprises two limiter structure and force cell; Described two limiter structures comprise hook, lower draw-bar, upper hook dish, upper limiter, lower draw-bar dish, lower limiter, wire guide; On this, hook connecting is connected to below hook dish, and on this, hook dish to be positioned at above limiter and to be limited to slide along wire guide above upper limiter; This lower draw-bar is connected to above lower draw-bar dish, and this lower draw-bar dish to be positioned at below lower limiter and to be limited to slide along wire guide below lower limiter; The toggle mechanism silk fork installing described force cell can hold up hook dish and move up to realize loading load to the hank knotting sample of hook between upper hook, lower draw-bar.
The proving installation of described chemical-fibres filaments percent thermal shrinkage, it is characterized in that: described force cell is connected to the dynamometry frame one end being driven lifting by screw mandrel, this dynamometry frame other end connects roller by connecting rod, this roller at skewed slot guide rail to slip, it is protruding after rising to precalculated position that this skewed slot guide rail makes to stir machine hook silk fork, and inject upper between hook dish and the space of hank knotting sample gradually.
The proving installation of described chemical-fibres filaments percent thermal shrinkage, device is characterised in that: described screw mandrel is driven by stepper motor, gear and synchromesh gear belt.
The proving installation of described chemical-fibres filaments percent thermal shrinkage, is characterized in that: described two limiter structures around a sample cylinder circumferentially distribution arrange multiple, and be all positioned on cylinder pallet; There is below this cylinder pallet steady arm locate at test position to control each pair of limiter structure.
The proving installation of described chemical-fibres filaments percent thermal shrinkage, is characterized in that: described stepper motor and force cell all link computing machine, and computing machine also links input-output device further.
A method of testing for chemical-fibres filaments percent thermal shrinkage, is realized by proving installation described above, it is characterized in that:
It comprises the steps:
A, open the proving installation of chemical-fibres filaments percent thermal shrinkage and the power supply of computing machine, preheating half an hour;
B, start test before, be 500mm by girth, after hanging, length is that the hank knotting sample of 250mm is hung between the upper hook of circular sample tub and lower draw-bar, and upper hook dish is shelved on limiter, and hank knotting sample is sagging due to the weight effect by lower draw-bar dish to be stretched;
C, one week total N number of (N is more than or equal to 1) of sample cylinder can supply the hook housing linking up with hank knotting sample, sample cylinder is placed on cylinder pallet, after hanging up properly the hank knotting sample needing test, press the navigation button on instrument panel, sample cylinder pallet stops after driving sample cylinder to turn to first hank knotting sample testing position automatically;
D, press the start button on instrument panel, computing machine sends pulse signal Driving Stepping Motor and rotates, pass through gear, synchromesh gear belt, gear, screw mandrel drives dynamometry frame to rise from instrument lower limit original position, roller is due to the guiding function of skewed slot guide rail, the silk be connected with force cell is made to pitch in machine protruding by connecting rod, inject upper between hook dish and the space of hank knotting sample gradually, after silk fork is moved upward to and contacts with upper hook tray bottom, start to hold up hook dish, driven on hank knotting sample and lower draw-bar dish by wire guide and wire guide guiding and move, wire guide and wire guide are packed on the upper and lower side frame of sample cylinder respectively, stopped by lower limiter when lower draw-bar dish moving in lower limiter contact and stop mobile,
After E, lower draw-bar are hindered stop motion, upper hook dish continues to be driven and moves, hank knotting sample elongates inner tensions and increases gradually, in order to not make tension spikes, uphill process automatic retarding, when hank knotting sample tension force is increased to pre-set criteria tension force, instrument sends Driving Stepping Motor umber of pulse by computing machine and automatically records specimen length, i.e. the length of hank knotting sample under standard tension force;
After F, test hank knotting specimen length complete, dynamometry frame declines homing automatically, silk fork is bounced back to again in machine by the guiding function of skewed slot guide rail, after testing a hank knotting sample, sample cylinder turns an angle, and instrument starts to carry out length testing to lower hank knotting sample again;
G, survey hank knotting specimen length before not heating for heating before length, heat after for heating after length, by both test result calculations chemical-fibres filaments percent thermal shrinkages.
Compared with prior art advantage of the present invention is as follows:
1, two limiter structures of original creation design in apparatus of the present invention.Upper limiter is used for shelving hook dish, makes hank knotting sample naturally droop the original state of stretching by the weight effect of lower draw-bar dish before the test.Hank knotting sample rise at present limiter for stopping lower draw-bar dish, when making stretching hank knotting sample, force cell is subject to load in downward direction, the force value solving external instrument dynamometric system demarcates Problems existing, makes test structure more reasonable, measures structure more accurate.
2, apparatus of the present invention test chemical-fibres filaments percent thermal shrinkage is separated with test crimped filament rate and is not incorporated on an instrument, is designed to the long filament heat shrinkage testing tool of single project survey.Dynamometry load range reduces, and force measurement resolution and precision improve, and is conducive to the accuracy improving test result.
3, apparatus of the present invention are used, chemical-fibres filaments hank knotting sample girth 1 meter changes 500mm into, and after hank knotting hangs, length changes 250mm into by 500mm, reduces instrument volume and weight, the baking oven during heating of sample cylinder and heating water tank volume reduce, and operation uses convenient.
Accompanying drawing explanation
Fig. 1 is two limiter structure schematic diagram of apparatus of the present invention.
In Fig. 1,1-sample, 2-upper hook, 3-lower draw-bar, 4-upper hook dish, 5-upper limiter, 6-lower draw-bar dish, 7-lower limiter, 8,9-wire guide.
Fig. 2 is the proving installation schematic diagram of chemical-fibres filaments percent thermal shrinkage of the present invention.
In Fig. 2,1-sample, 2-upper hook, 3-lower draw-bar, 4-upper hook dish, 5-upper limiter, 6-lower draw-bar dish, 7-lower limiter, 8,9-wire guide, 10-dynamometry frame, 11-force cell, 12-silk is pitched, 13-connecting rod, 14-roller, 15-skewed slot guide rail, 16-screw mandrel, 17-gear, 18-synchromesh gear belt, 19-gear, 20-stepper motor, 21-display, 22-computing machine, 23-printer.
Fig. 3 is casing schematic perspective view.
In Fig. 3,24-casing, 25-sample cylinder, 241-steady arm, 242-raise button, 243-decline button, 244-power switch, 245-start button, 246-stop button, 247-navigation button, 248-potentiometer, 249-cylinder pallet.
Embodiment
Refer to Fig. 1-3, the invention discloses a kind of proving installation of chemical-fibres filaments percent thermal shrinkage.As shown in Figure 1, main innovate point of the present invention is: it comprises two limiter structure and force cell 11; Described two limiter structures comprise 1, upper hook 2, lower draw-bar 3, upper hook dish 4, upper limiter 5, lower draw-bar dish 6, lower limiter 7, wire guide 8,9; On this, hook 2 is connected to below hook dish 4, and on this, hook dish 4 to be positioned at above limiter 5 and to be limited to slide along wire guide above upper limiter 5; This lower draw-bar 3 is connected to above lower draw-bar dish 6, and this lower draw-bar dish 6 to be positioned at below lower limiter 7 and to be limited to slide along wire guide below lower limiter 7; The toggle mechanism silk fork 12 being provided with described force cell 11 can hold up hook dish 4 and move up the hank knotting sample 1 realized being hooked between upper hook 2, lower draw-bar 3 and load load.
By above-mentioned pair of limiter structure, upper limiter is used for shelving hook dish, makes hank knotting sample naturally droop the original state of stretching by the weight effect of lower draw-bar dish before the test; When force cell and toggle mechanism silk fork drive hank knotting sample to rise, lower limiter is for stopping lower draw-bar dish, and when making stretching hank knotting sample, sensor is subject to load in downward direction, it solves external instrument dynamometric system force value and demarcates Problems existing.
In order to realize test, apparatus of the present invention are also furnished with following structure:
Desired force cell 11 is connected to dynamometry frame 10 one end being driven lifting by screw mandrel 16, this dynamometry frame 10 other end connects roller 14 by connecting rod 13, this roller 14 leads at skewed slot guide rail 15 and slides, this skewed slot guide rail 15 makes toggle mechanism silk fork 12 protruding after rising to precalculated position, and injects upper between hook dish 4 and the space of hank knotting sample 1 gradually.
Described screw mandrel 16 is driven by stepper motor 20, gear 17,19 and synchromesh gear belt 18.
Described two limiter structures circumferentially distribute and arrange multiple (as 20) around a sample cylinder 25, and are all positioned on cylinder pallet 249; There is below this cylinder pallet 249 steady arm 241 locate at test position to control each pair of limiter structure.
The proving installation of described chemical-fibres filaments percent thermal shrinkage, is characterized in that: the girth of described hank knotting sample 1 is 500mm, and after hanging, length is 250mm.
Described stepper motor 20 is all connected computing machine 22 with force cell 11, and computing machine 22 also connects input-output device further.
A method of testing for chemical-fibres filaments percent thermal shrinkage, realized by proving installation described above, it comprises the steps:
A, the proving installation opening chemical-fibres filaments percent thermal shrinkage and computer power supply, preheating half an hour;
B, start test before, be 500mm by girth, the rear length of suspension is that the hank knotting sample 1 of 250mm is hung between the upper hook 2 of circular sample tub and lower draw-bar 3, and upper hook dish 4 is shelved on limiter 5, and hank knotting sample 1 is sagging due to the weight effect by lower draw-bar dish 6 to be stretched;
C, sample cylinder 25 1 weeks are total N number of, and (N is more than or equal to 1, as 20) can for the hook housing of hook hank knotting sample, sample cylinder 25 is placed on cylinder pallet 249, after hanging up properly the hank knotting sample needing test, press the navigation button 247 on instrument panel, sample cylinder pallet 249 stops after driving cylinder 25 to turn to first hank knotting sample testing position automatically;
D, press the start button 245 on instrument panel, computing machine 22 sends pulse signal Driving Stepping Motor 20 and rotates, by gear 19, synchromesh gear belt 18, gear 17, screw mandrel 16 drives dynamometry frame 10 to rise from instrument lower limit reference position, roller 14 is due to the guiding function of skewed slot guide rail 15, by connecting rod 13, the silk be connected with force cell 11 is pitched 12 protruding in machine, inject upper between hook dish 4 and the space of hank knotting sample 1 gradually, when silk fork 12 be moved upward to upper hook dish 4 bottom connection after touch, start to hold up hook dish 4, lead to drive on hank knotting sample 1 and lower draw-bar dish 6 by wire guide 8 and wire guide 9 and move, wire guide 8 and wire guide 9 are packed on the upper and lower side frame of sample cylinder 25 respectively, stopped by lower limiter 7 when lower draw-bar dish 6 moving to and contacting with lower limiter 7 and stop mobile,
E, lower draw-bar 3 are by after resistance stop motion, upper hook dish 4 continues to be driven and moves, hank knotting sample elongates inner tensions and increases gradually, in order to not make tension spikes, uphill process automatic retarding, when hank knotting sample tension force is increased to pre-set criteria tension force, the umber of pulse that instrument sends Driving Stepping Motor by computing machine records specimen length automatically, i.e. the length of hank knotting sample under standard tension force;
After F, test hank knotting specimen length complete, dynamometry frame 10 declines homing automatically, silk fork 12 is bounced back to again in machine by the guiding function of skewed slot guide rail 15, after testing the sample of a hank knotting, sample cylinder turns an angle, and instrument is starting to carry out length testing to next hank knotting sample;
G, to survey hank knotting specimen length before not heating be length before heating, be length after heating after heating, calculate chemical-fibres filaments percent thermal shrinkage by both differences.
In the inventive method implementation process, length variations before accurately measuring the heating of chemical-fibres filaments sample according to computing machine umber of pulse and step motor control technology and after heating, length resolution is 0.01mm, improving significantly can the measuring accuracy of chemical-fibres filaments sample percent thermal shrinkage, structure is reliable, and failure rate greatly reduces.Adopt dynamometry frame to measure tension force suffered by hank knotting, can accurately measure pre-set criteria tension value, resolution is 0.1cN, reduces because pre-tension error is on the impact of the length measurement before the heating of long filament sample and after heating.After hank knotting sample hangs, length changes into 250mm by the 500mm of external instrument, and instrument volume and weight greatly alleviates, and can measure 20 samples at every turn, improves the confidence level of test result.
Be only present pre-ferred embodiments in sum, be not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.
Claims (7)
1. the proving installation of chemical-fibres filaments percent thermal shrinkage and a method of testing thereof, is characterized in that: it comprises two limiter structure and force cell (11); Described two limiter structures comprise hook (2), lower draw-bar (3), upper hook dish (4), upper limiter (5), lower draw-bar dish (6), lower limiter (7), wire guide (8,9); On this, hook (2) is connected to hook dish (4) below, and on this, hook dish (4) is positioned at limiter (5) top and is limited to slide along wire guide in upper limiter (5) top; This lower draw-bar (3) is connected to lower draw-bar dish (6) top, and this lower draw-bar dish (6) is positioned at lower limiter (7) below and is limited to slide along wire guide in lower limiter (7) below; Described force cell (11) and toggle mechanism silk fork (12) that is connected thereof are installed can hold up hook dish (4) and move up to realize to load load to the hank knotting sample (1) of hook between upper hook (2), lower draw-bar (3).
2. the proving installation of chemical-fibres filaments percent thermal shrinkage according to claim 1, it is characterized in that: described force cell (11) is connected to dynamometry frame (10) one end being driven lifting by screw mandrel (16), this dynamometry frame (10) other end connects roller (14) by connecting rod (13), this roller (14) slides in skewed slot guide rail (15) guiding, this skewed slot guide rail (15) makes toggle mechanism silk fork (12) protruding after rising to precalculated position, and injects upper between hook dish (4) and the space of hank knotting sample (1) gradually.
3. the proving installation of chemical-fibres filaments percent thermal shrinkage according to claim 2, is characterized in that: described screw mandrel (16) is driven by stepper motor (20), gear (17,19) and synchromesh gear belt (18).
4. the proving installation of the chemical-fibres filaments percent thermal shrinkage according to claim 1 or 2 or 3, is characterized in that: described two limiter structures around a sample cylinder (25) circumferentially distribution arrange multiple, and be all positioned on cylinder pallet (249); This cylinder pallet (249) below has steady arm (241) and locates at test position to control each pair of limiter structure.
5. according to the proving installation of claim 1 or 2 or 3 or described chemical-fibres filaments percent thermal shrinkage, it is characterized in that: the girth of described hank knotting sample (1) is 500mm, after hanging, length is 250mm.
6. the proving installation of chemical-fibres filaments percent thermal shrinkage according to claim 3, is characterized in that: described stepper motor (20) is all connected computing machine (22) with force cell (11), and computing machine (22) also connects input-output device further.
7. a method of testing for chemical-fibres filaments percent thermal shrinkage, is realized by the proving installation as described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that: it comprises the steps:
A, the proving installation opening chemical-fibres filaments percent thermal shrinkage and computer power supply, preheating half an hour;
B, start test before, be 500mm by girth, the rear length of suspension is that the hank knotting sample (1) of 250mm is hung between the upper hook (2) of circular sample tub and lower draw-bar (3), upper hook dish (4) is shelved on limiter (5), and hank knotting sample (1) is sagging due to the weight effect by lower draw-bar dish (6) to be stretched;
C, sample cylinder have N number of (N is more than or equal to 1) for (25) one weeks can for the hook housing of hook hank knotting sample, sample cylinder (25) is placed on cylinder pallet (249), after hanging up properly the hank knotting sample needing test, press the navigation button (247) on instrument panel, sample cylinder pallet (249) stops after driving cylinder (25) to turn to first hank knotting sample testing position automatically;
D, press the start button (245) on instrument panel, computing machine (22) sends pulse signal Driving Stepping Motor (20) and rotates, by gear (19), synchromesh gear belt (18), gear (17), screw mandrel (16) drives dynamometry frame (10) to rise from instrument lower limit reference position, roller (14) is due to the guiding function of skewed slot guide rail (15), by connecting rod (13) make the silk be connected with force cell (11) pitch (12) protruding in machine, inject upper between hook dish (4) and the space of hank knotting sample (1) gradually, when silk fork (12) be moved upward to upper hook dish (4) bottom connection after touch, start to hold up hook dish (4), driven on hank knotting sample (1) and lower draw-bar dish (6) by wire guide (8) and wire guide (9) guiding and move, wire guide (8) and wire guide (9) are packed on the upper and lower side frame of sample cylinder (25) respectively, stopped by lower limiter 7 when lower draw-bar dish (6) moving to and contacting with lower limiter (7) and stop mobile,
E, lower draw-bar (3) are by after resistance stop motion, upper hook dish (4) is continued to be driven and is moved, hank knotting sample elongates inner tensions and increases gradually, in order to not make tension spikes, uphill process automatic retarding, when hank knotting sample tension force is increased to pre-set criteria tension force, the umber of pulse that instrument sends Driving Stepping Motor by computing machine records specimen length automatically, i.e. the length of hank knotting sample under standard tension force;
After F, test hank knotting specimen length complete, dynamometry frame (10) declines homing automatically, silk fork (12) is bounced back to again in machine by the guiding function of skewed slot guide rail (15), after testing the sample of a hank knotting, sample cylinder turns an angle, and instrument is starting to carry out length testing to next hank knotting sample;
G, to survey hank knotting specimen length before not heating be length before heating, be length after heating after heating, calculate chemical-fibres filaments percent thermal shrinkage by both differences.
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| CN201510401095.2A CN104914128A (en) | 2015-07-08 | 2015-07-08 | Device for testing chemical fiber filament heat shrinkage rate and testing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449796A (en) * | 2017-07-26 | 2017-12-08 | 芜湖富春染织股份有限公司 | A kind of dyed yarn heat shrinkable method of testing |
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| CN102621175A (en) * | 2012-04-01 | 2012-08-01 | 广东中烟工业有限责任公司 | Measurement device for thermal shrinkage ratio of pull wire |
| CN103018273A (en) * | 2013-01-04 | 2013-04-03 | 上海新纤仪器有限公司 | Device and method for testing hot-shrinkage rate of chemical fiber filaments |
| CN203101295U (en) * | 2013-01-23 | 2013-07-31 | 科德宝宝翎衬布（南通）有限公司 | Special device for testing heat shrinkage rate |
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| JPH10318952A (en) * | 1997-05-20 | 1998-12-04 | Toray Eng Co Ltd | Heat shrinkage measuring device of filament |
| US20010049968A1 (en) * | 2000-05-08 | 2001-12-13 | Korea Advanced Institute Of Science And Technology | Apparatus for and method of measuring thermal stress of concrete structure |
| CN201917535U (en) * | 2010-12-28 | 2011-08-03 | 德州学院 | Device for measuring expansion coefficient of metal wire by single slit diffraction method |
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| CN107449796A (en) * | 2017-07-26 | 2017-12-08 | 芜湖富春染织股份有限公司 | A kind of dyed yarn heat shrinkable method of testing |
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