GB2028878A - Method of and Rib Jacquard Circular Knitting Machine Modified for Producing Looped or Cut Pile. - Google Patents
Method of and Rib Jacquard Circular Knitting Machine Modified for Producing Looped or Cut Pile. Download PDFInfo
- Publication number
- GB2028878A GB2028878A GB7929496A GB7929496A GB2028878A GB 2028878 A GB2028878 A GB 2028878A GB 7929496 A GB7929496 A GB 7929496A GB 7929496 A GB7929496 A GB 7929496A GB 2028878 A GB2028878 A GB 2028878A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plush
- yarn
- jack
- knitting machine
- cam
- 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- Withdrawn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
- 238000009940 knitting Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001965 increasing effect Effects 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 238000000059 patterning Methods 0.000 claims abstract description 6
- 230000001154 acute effect Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
-
- 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
- D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/12—Circular knitting machines with independently-movable needles with provision for incorporating pile threads
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Jacquard Knitted plush fabric is produced on a rib jacquard circular knitting machine having two cam tracks arranged in the dial 1, for short and long latch needles 3 in cam systems I, II, III and IV, and having plush jacks 9 in the cylinder 7 instead of needles which operate alternately in rows in the interval 1:1, and having a patterning device 18, a ground yarn 20 and a plush yarn 21 being picked up in cam systems I and III 26, 28 by a latch needle 3 which is cranked at the needle head 4. The plush jack 9 being, at the moment of yarn laying, between the ground yarn 20 and the plush yarn 21. Shortly after the plush jack 9 reaches its highest position, the looping of the ground yarn 20 and the plush yarn 21 is effected by the latch needle 3 in the dial, plush loop 23 being tensioned or held by the plush jack 9. Thereafter the plush jack 9 is lowered and the plush loop 23 is retensioned by a stepless recess 11 in the plush jack head 10 and then ground yarn 22 is picked up by the latch needles 3 in their clearing or fully advanced position in cam system II and IV 27, 29. Afterwards the ground yarn 21 is looped and shortly thereafter the plush loop 23 is knocked over or severed with increasing tensile stress by the lowering of the plush jack 9 to its full extent. A rib Jacquard knitting machine modified for carrying out the method is described. <IMAGE>
Description
SPECIFICATION
Method and Rib Jacquard Circular Knitting
Machine for Producing Looped or Cut Plush
This invention relates to a method and a rib jacquard circular knitting machine for producing looped or cut plush, in particular to a rib jacquard circular knitting machine having two cam tracks, arranged in the dial, for short and long latch needles in cam systems I and also II and Ill and also IV, and having plush loop forming elements constructed as jacks in the cylinder and operating alternately in rows in the interval 1:1, and a patterning device.
A method and a circular knitting machine for producing jacquard looped plush are already known, wherein the formation of the plush loop and the looping, up to the finished knitting, are carried out in a yarn locating zone after which, by means of a pattern jack head with a width of continuously uniform thickness, the plush loop is brought to a given size and contracted somewhat in the knitting, and the circular knitting machine has latch needles disposed in the dial and slidable pattern jacks in the cylinder which have a yarn locating zone recessed in the shaft of said pattern jacks and, situated above this, a pattern jack head which corresponds in its dimensions to the jack stem (US Patent Specification 3 477 255).
The disadvantage of this method for producing looped plush is that during the process of forming and enmeshing the plush loop a state of tension is always controlled, or maintained through the single yarn locating zone and so the plush loops do not acquire a uniform size, with the result that there are deficiencies in the quality of the goods.
Equalising of the plush loops in the finished knitting, once they have been enmeshed, produces only a partial effect on the uniformity of the enmeshing of the plush loops.
A separate method is needed for the production of cut plush.
The disadvantage of such a circular knitting machine is that there is no guarantee of a secure engagement of the plush and ground yarn by the latch needles and the result is defective plush.
Moreover, such circular knitting machine is a single purpose machine and so the requirements for fixed capital economy are not met.
It is an object of the invention, therefore, to provide an improvement in the quality of the knitting by regulation of the plush loop forming process from yarn laying to knocking over or cutting with increasing tensile force and, furthermore, to achieve a saving in time by simultaneous cutting in the same process. The invention seeks, further, to avoid defective goods by dependable engagement of the plush or ground yarn and to effect a saving in basic means through the convertibility of the standard machine to a plush producing machine.
The problem which the invention aims at solving is to provide a method which effects a compensation of yarn tension on the plush loops in the plush loop forming process with increasing equalisation, or increase, of tension, even during yarn laying, and makes possible a firm enmeshing of the plush yarn and the plush loop and ground yarn until the knocking over or cutting, and furthermore, through the increasing tensile stress on the plush loops, ensures cutting with flanks of equal length and an even cut as well as permitting the cutting of the plush loops continuously in one operation in the plush loop forming process.The invention seeks further to provide a circular knitting machine for the production of knitted plush fabrics which, by means of advantageous construction of the latch needles, guarantees a secure engagement of the plush and ground yarns as well as permitting a favourable design for the plush jack and convertibility of the rib jacquard circular knitting machine to a plush producing machine.
Accordingly, the present invention consists in a method of producing a jacquard knitted looped or cut plush fabric, in particular on a rib jacquard circular knitting machine having two cam tracks, arranged in the dial, for short and long latch needles in cam system I as well as II and in cam system III as well as IV, and having plush jacks in the cylinder which operate alternately in rows in the interval 1::1, and having a patterning device, characterised in that a ground yarn and a plush yarn are picked up in cam system I and III by a latch needle which is cranked at the needle head and the plush jack in the cylinder, at the moment of yarn laying, is in a position between the ground yarn and the plush yarn and shortly after the plush jack has been raised into its highest position the looping of the ground yarn and the plush yarn is effected by the latch needle in the dial, in which looping process the plush loop is tensioned, or held, by the plush jack, after which the plush jack is lowered to a predetermined level so that the plush loop is re-tensioned by a stepless recess in the plush jack head, then the ground yarn is picked up by the latch needles in the clearing or fully advanced position of the needles in cam system II and IV and afterwards the ground yarn is looped and shortly afterwards the plush loop is knocked over or severed with increasing tensile stress by the lowering of the plush jack to its full extent.Compensation, or regulation of yarn tension in the plush loop in accordance with the plating requirements, as well as fluctuations in yarn pull with increasing tensile force on the plush loops, is achieved through the fact that from the laying of the ground and the plush yarns to the closing of the latch needle the plush loop in cam system I and III is subjected to preliminary tension and before and also during the looping of the ground and plush yarns the plush loop is tensioned by the plush jack and shortly afterwards re-tensioned until the picking up of the ground yarn in cam system II and IV and also, during the looping of the ground yarn and shortly afterwards until the knocking over and cutting of the plush loop, is again re-tensioned with increasing tensile stress.
This is achieved by the rib jacquard circular knitting machine for carrying out the method through the fact that the needle heads of the latch needles in a dial are cranked and the plush jacks in a cylinder are provided, in the head of the plush jack in the side opposite the cylinder, with a recess which widens steplessly at an acute angle from the upper end and likewise are relief-ground at an acute angle on the upper side from the upper end of the head of the plush jack, while the dial cam carrier with the cam elements for the latch needles and the yarn guides is offset in relation to the cylinder with the cam element for the plush jacks.
The conversion of the rib jacquard circular knitting machine is ensured in particular through the fact that the dial cam carrier with the cam elements for the latch needles and the yarn guides is offset in relation to the cylinder with the cam element for the plush jacks to such an extent that at the moment of thread laying the plush jack is between the ground and the plush yarns.
The even severing of the plush loops with increasing tension up to the moment of cutting is achieved by the provision of a cutting means on the end portion of the steplessly widening recess in the head of the plush jack.
An efficient and advantageous design for the cutting means on the plush jack head is obtained by forming the end portion of the steplessly widening recess on the plush jack head as a knife edge of by providing it with a cutting head.
The possibility of using the plush jack for looped plush or cut plush and the various pile heights is ensured by the fact that the plush jacks are variable according to the pattern and are provided with or without a cutting edge and are of various widths.
To obtain various pattern effects in the plush the patterning-mechanism operates the oddnumbered piush jacks in cam system I and the even-numbered plush jacks in cam system III.
A method has been developed by the invention which guarantees the regulation of the plush loop tension in a steplessly increasing manner, corresponding to the individual steps of the process throughout the entire operation for producing looped or cut plush, thus making possible a uniform size for the plush loop and firm enmeshing of the plush loops with equal flank lengths and an even cut.With the possibility of conversion of the standard rib jacquard circular knitting machine to looped or cut plush producing
machine, through the use of latch needles which are cranked at the needle head in the dial, a safe
engagement of the plush and ground yarns is
guaranteed and with it a reduction in the amount of defective plush, while the use of a plush jack with a recess which widens steplessly at an acute
angle from the upper end of the head of the plush jack guarantees a plurality of stepless yarn
location zones and, in accordance with the plating
requirements and also the fluctuations in yarn
tension, compensates the yarn tension in the
plush loop and regulates it, thereby enhancing
quality.As a result of the provision of a cutting edge on the end portion of the steplessly widening recess in the head of the plush jack the tensile stress on the plush loop increases up to the moment of cutting, which makes possible a cut giving equal flank lengths and an even cut, and consequently a plush of very high quality without recourse to a separate cutting device.
The possibility of converting the standard rib jacquard circular knitting machine to a looped plush or cut plush process is an important advance for fixed capital economy, achieved by a reduction in the basic means.
In order that the invention may be more readily understood, reference is made to the accompanying drawings which illustrate diagrammatically and by way of example an embodiment thereof, and in which: Fig. 1 is a partial section through a rib jacquard circular knitting machine wherein the latch needle with a cranked head in the dial and the plush jack, provided with a recess, in the cylinder, are shown at the moment of yarn laying when the plush jack is in a position between the ground and the plush yarn, corresponding to a cross-section on the line A-A of Fig. 7; Fig. 2 shows an enlarged detail of Fig. 1, corresponding to cross-section on the line A-A of Fig. 7;;
Fig. 3 shows the operation of looping the ground and plush yarns, corresponding to a crosssection on the line B-B of Fig. 7 wherein the plush jack is in its highest position;
Fig. 4 shows the operation of laying the ground yarn, corresponding to a cross-section on the line C-C of Fig. 7, wherein the plush jack is drawn down a little so that the tensile stress on the plush loop is increased;
Fig. 5 shows the operation of looping the ground yarn, corresponding to a cross-section on the line D-D of Fig. 7;
Fig. 6 shows the operation of knocking over, or cutting, corresponding to a cross-section on the line E-E of Fig. 7, wherein the plush jack is drawn down to the fullest extent so that the tensile stress on the plush loop rises increasingly until the moment of knocking over or cutting;; and
Fig. 7 shows the cam elements in the cylinder for the plush jack with the movement of the plush jack butts plotted on a diagram.
In the dial 1 of a circular knitting machine latch
needles 3 are brought into an operational position
by cam elements 2. Each latch needle is cranked
at the needle head 4, is actuated by way of the
needle butt 5 and has a latch 6.
In the cylinder 7 plush jacks 9 are moved by
cam elements 8. Each plush jack 9 has a head 10 which is provided, on the side facing away from the cylinder 7, with a recess 11 which widens out steplessly at an acute angle from the upper end of the head 1 0. This plush jack is advantageously
provided with a cutting means 12 on the end
portion of the steplessly widening recess 1 To this end the end portion of the recess 11 in the
plush jack head 10 is constructed as a knife edge
or is provided with a cutting head. The upper end of the plush jack head 10 is relief ground at an acute angle in order to form a guiding tip 14. To ensure greater stability for the jack head 10 the recess 11 terminates in a curvature 1 5.
Actuation of the plush jack 9 in accordance with the pattern is effected by way of the plush jack butt 16, controlled by a pattern jack 1 7 which is actuated by a patterning device 1 8. Yarn guides 1 9 are provided which have two drilled holes for the ground yarn 20 and the plush yarn 21 in cam system I and 111--26; 28. In cam system II and IVZ7; 29 the yarn guides 19 have only one drilled hole for the ground yarn 22.
The plush loop 23 is formed from the plush yarn 21 by retracting the latch needle 3.
Depending on whether the plush jack 9 with or without the cutting edge 12 is used, the result is looped plush 24 (Fig. 3) or cut plush 25. The cam elements 8 are disposed in cam system 1--26, cam system 11-27, cam system 111--28, and cam system lV-29.
The odd numbered plush jack butts, or plush jacks 30 are operated according to the pattern in cam system 1--26 and the even-numbered plush jack butts or plush jacks 31 in cam system Ill- 28. In cam systems II and lV-27; 29 both plush jacks 30; 31 operate in the miss position.
The individual operational steps of the method are characterised in particular by the function of the recess 11 in the plush jack head 10 on the side facing away from the cylinder 7 which widens out steplessly at an acute angle from the upper end, in consequence of the possibility of alteration of the stepless yarn location zone in conformity with the phases of the looped plush formation process.
In the first operational step (Figs. 1 and 2), at the moment of laying of the ground yarn 20 and the plush yarn 21, the plush jack 9 is in a position between these two yarns 20; 21 in the cam system I and 111--26; 28, the jack 9 being afterwards raised into its highest position (Fig. 3).
In this yarn location zone, i.e. in the highest position of the plush jack 9, looping of the ground yarn 20 and plush yarn 21 is effected by the latch needle 3 in the dial 1 in the second operational step.
The plush jack 9 is then lowered a little and in this second yarn location zone of the plush jack 9 the plush loop 23 is re-tensioned (Fig. 4) in the third operational step.
At the same level of the plush jack 9 the ground yarn 22 is picked up in cam system II and lV-27; 29 (Fig. 4) in the fourth operational step and the ground yarn 22 is looped (Fig. 5) in the fifth operational step.
Shortly afterwards the plush loop 23 is knocked over, or severed (Fig. 6) with increasing tension by the complete lowering of the plush jack 9 in the sixth operational step.
The characteristic feature in the conversion of the standard rib jacquard circular knitting machine to a machine for producing looped plush or cut plush is that, at the moment of laying of the ground yarn 20 and the plush yarn 21, the plush jack 9 is in a position between these two yarns 20; 21 in cam system I and 111--26; 28 (Figs. 1 and 2).
Claims (11)
1. Method of producing a jacquard knitted looped or cut fabric, in particular on a rib jacquard circular knitting machine having two cam tracks, arranged in the dial, for short and long latch needles in cam system I as well as II and in cam system III as well as IV, and having plush jacks in the cylinder which operate alternately in rows in the interval 1::1, and having a patterning device, characterised in that a ground yarn and a plush yarn are picked up in cam system I and Ill by a latch needle which is cranked at the needle head and the plush jack in the cylinder, at the moment of yarn laying, is in a position between the ground yarn and the plush yarn and shortly after the plush jack has been raised into its highest position the looping of the ground yarn and the plush yarn is effected by the latch needle in the dial, in which looping process the plush loop is tensioned, or held, by the plush jack, after which the plush jack is lowered to a predetermined level so that the plush loop is re-tensioned by a stepless recess in the plush jack head, then the ground yarn in picked up by the latch needles in the clearing or fully advanced position of the needles in cam system II and IV and afterwards the ground yarn is looped and shortly afterwards the plush loop is knocked over or severed with increasing tensile stress by the lowering of the plush jack to its full extent.
2. Method of producing a jacquard knitted plush fabric according to claim 1, wherein from the layingof the ground yarn and the plush yarn to the closing of the latch needle, the plush loop in cam system I and III is put under preliminary tension and before and also during the looping of the ground yarn and piush yarn the plush loop is tensioned by the plush jack and shortly afterwards re-tensioned up to the picking up of the ground yarn in cam system II and IV and also, during the looping of the ground yarn and shortly afterwards up to the knocking over or severing of the plush loop, is again re-tensioned with increasing tensile stress.
3. Method of producing a jacquard knitted plush fabric, substantially as herein described with reference to and as shown in the accompanying drawings.
4. Rib jacquard circular knitting machine for carrying out the method claimed in any of claims 1 to 3, wherein the needle head of each latch needle in the dial is cranked and each plush jack in the cylinder is provided in the plush jack head in the side facing away from the cylinder with a recess which widens out steplessly at an acute angle from the upper end of the head and, likewise from the upper end of the plush jack head, is relief ground at an acute angle on the upper side, a dial cam carrier having cam elements for the latch needles and yarn guides being offset in relation to the cylinder having cam elements for the plush jacks.
5. Rib jacquard circular knitting machine according to claim 4, wherein the dial cam carrier with the cam elements for the latch needles and the yarn guides are offset in relation to the cylinder with the cam elements for the plush jacks to such an extent that, in use, at the moment of thread laying the plush jack is in a position between the ground yarn and the plush yarn.
6. Rib jacquard circular knitting machine according to claim 4 or 5, wherein the end portion of the steplessly widening recess in the plush jack head is provided with a yarn cutting means.
7. Rib jacquard circular knitting machine according to claim 6, wherein the end portion of the steplessly widening recess in the plush jack head is constructed as a knife-edge or is provided with a cutting head.
8. Rib jacquard circular knitting machine according to any of claims 4 to 7, wherein the plush jacks are provided so as to be variable according to the pattern, with or without a yarn cutting means.
9. Rib jacquard circular knitting machine according to any of claims 4 to 8, wherein the plush jacks are of different widths.
10. Rib jacquard circular knitting machine according to any of claims 4 to 9, wherein the patterning device operates odd-numbered plush jacks in cam system I and even-numbered plush jacks in cam system Ill.
11. Rib jacquard circular knitting machine for producing plush fabric, substantially as herein described with reference to and as shown in the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD20750378A DD138227A1 (en) | 1978-08-28 | 1978-08-28 | R / R JACQUARD ROUND KNITTING MACHINE FOR MAKING PLUESCHGESTRICKEN |
| DD20750478A DD138226A1 (en) | 1978-08-28 | 1978-08-28 | PROCESS FOR PRODUCING JACQUARD-HENKEL-BZW.SCHNEIDPLUESCH |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2028878A true GB2028878A (en) | 1980-03-12 |
Family
ID=25747624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7929496A Withdrawn GB2028878A (en) | 1978-08-28 | 1979-08-24 | Method of and Rib Jacquard Circular Knitting Machine Modified for Producing Looped or Cut Pile. |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2917378A1 (en) |
| ES (1) | ES483663A1 (en) |
| GB (1) | GB2028878A (en) |
| IT (1) | IT1117422B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1176243A1 (en) * | 2000-07-29 | 2002-01-30 | Terrot Strickmaschinen GmbH | Circular knitting machine |
| CN117779324A (en) * | 2024-02-26 | 2024-03-29 | 泉州恒毅机械有限公司 | Carpet machine knitting process for mixed knitting of pile loops and piles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017106961B3 (en) * | 2017-03-31 | 2018-05-30 | Terrot Gmbh | Knitting machine, knitting process and knitted fabric |
-
1979
- 1979-04-28 DE DE2917378A patent/DE2917378A1/en not_active Withdrawn
- 1979-08-07 IT IT49974/79A patent/IT1117422B/en active
- 1979-08-24 GB GB7929496A patent/GB2028878A/en not_active Withdrawn
- 1979-08-27 ES ES483663A patent/ES483663A1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1176243A1 (en) * | 2000-07-29 | 2002-01-30 | Terrot Strickmaschinen GmbH | Circular knitting machine |
| CN117779324A (en) * | 2024-02-26 | 2024-03-29 | 泉州恒毅机械有限公司 | Carpet machine knitting process for mixed knitting of pile loops and piles |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1117422B (en) | 1986-02-17 |
| IT7949974A0 (en) | 1979-08-07 |
| DE2917378A1 (en) | 1980-06-04 |
| ES483663A1 (en) | 1980-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |