CN1291083C

CN1291083C - Drafting system of cotton spinning frame

Info

Publication number: CN1291083C
Application number: CN 03131507
Authority: CN
Inventors: 崔云海; 胡友梅; 王国龙; 贺松华
Original assignee: JINTAN TEXTILE MACHINE PARTS MANUFACTURING FACTORY
Current assignee: JINTAN TEXTILE MACHINE PARTS MANUFACTURING FACTORY
Priority date: 2003-05-16
Filing date: 2003-05-16
Publication date: 2006-12-20
Anticipated expiration: 2023-05-16
Also published as: CN1458308A

Abstract

The present invention discloses a drafting device for a cotton spinning machine. A middle drafting component is composed of a middle belt roller combination component, a middle roller, a short lower pin, a lower pin frame and a lower leather ring, wherein the middle belt roller combination component is composed of an iron roller, an upper pin frame and an upper leather ring; the upper ring is sheathed between the iron roller and a jaw of the upper pin frame; the upper pin frame can be detachably clamped on a main shaft of the iron roller by two bayonets and are tightly pressed by a clamping spring on the upper pin frame; the short lower pin is arranged on the lower pin frame, and the lower leather ring is sheathed between the middle roller and a jaw of the short lower pin; the center distance between the front roller and the middle roller is from 35mm to 39mm. Because a long lower pin, a long lower leather ring and a tension frame are removed, the long lower pin is modified into the short lower pin which is clamped by the lower pin frame; the center distance between the front roller and the middle roller is shortened; the pressure on the upper leather ring and the middle of the lower leather ring is further increased under the downward pressing action of the double jaws of the upper pin frame. The details of the spun yarn are decreased by 30% through the drafting device, and the CV evenness value is decreased by 0.3% to 0.5%.

Description

The drafting system of cotton spinning frame

Technical field:

The present invention relates to a kind of cotton spinning frame, refer more particularly to the drafting system of cotton spinning frame.

Background technology:

At present, at home and abroad on the cotton spinning frame that generally uses, its drafting system is all by the front draft parts, middle drafting unit and first break draft parts are formed, referring to accompanying drawing 1, the front draft parts are made of front leather roller 11 and front roller 12, the first break draft parts are made of with rear roller 32 back roller 31, middle drafting unit is by the medium rubber roller conjunction, middle roller 24, long downside pin 8, long apron 7 down and apron tension bracket 6 are formed, middle apron conjunction comprises iron roll 21, disjunctor top-pin rack 9 and upper leather ring 22, upper leather ring 22 is installed on iron roll 21 and the disjunctor top-pin rack 9, long apron 7 down is sleeved on middle roller 24 and the long downside pin 8, its drawing-off form is to adopt upper leather ring 22 and long apron 7 interactional drawing-off modes down, upper leather ring 22 and length are descended between the apron 7 by long downside pin 8 pop-ups, regulate between two aprons by the tensioning of apron tension bracket 6 again and contact pressure, and the centre-to-centre spacing L between front roller 12 and the middle roller 24 is between 44～50mm, the drafting system of this structure, upper leather ring 22 and following skin circle 7 contacted middle parts do not have radial effect power, in actual use, herein to the control ability of rove a little less than, frictional force deficiency between the two, make cotton spinning frame when the textile spun yarn of spinning, the details of cotton yarn, slubbing, parameters such as the dried value of CV bar are all undesirable, are difficult to the high-quality textile spun yarn of weaving out with such drafting system.

Summary of the invention:

The object of the present invention is to provide a kind of drafting system of cotton spinning frame.

The drafting system of cotton spinning frame of the present invention is by the front draft parts, middle drafting unit and first break draft parts three parts are formed, the front draft parts are made up of front leather roller and front roller, the first break draft parts are made up of back roller and rear roller, middle drafting unit then is made up of medium rubber roller conjunction, middle roller, short downside pin, downside pin frame and following apron, the medium rubber roller conjunction is made up of iron roll, top-pin rack and upper leather ring, upper leather ring is sleeved between the jaw of iron roll and top-pin rack, top-pin rack is installed on the main shaft of iron roll by two bayonet sockets on it, and is compressed by the jump ring on the top-pin rack; Short downside pin is installed on the downside pin frame, and the hypodermis snare is contained between the jaw of middle roller and short downside pin; Centre-to-centre spacing is 35mm～39mm between front roller and the middle roller.

As the improvement to above-mentioned drafting system, the centre-to-centre spacing between front roller and the middle roller is 38mm, and the thickness of following apron is greater than the thickness of upper leather ring.

Because the present invention has cancelled the long downside pin in the existing drafting system, long apron and tension bracket down, makes long downside pin into short downside pin, and is tightened by the downside pin frame; Top-pin rack is also made a big improvement, make top-pin rack change two jaw effects into by existing single jaw contact, can make like this, the middle part of following apron all is subjected to the suppressing action of top-pin rack, thereby increase the friction between two aprons, centre-to-centre spacing between front roller and the middle roller has had minimizing greatly in addition, pass through two jaw suppressing actions of top-pin rack like this, the pressure at upper leather ring and following apron middle part is further increased, after tested: the upper leather ring in this drafting system, following apron obviously strengthens the control ability of cotton yarn, under equal spinning conditions, use this drafting system and existing drafting system to try to spin contrast, use the spun spun yarn of this drafting system to compare its spun yarn details with the spun spun yarn of existing drafting system and descend about 30%, the CV bar is done value and is descended 0.3%～0.5%, and other spun yarn parameter also increases.

Description of drawings:

Fig. 1 is the drawing-off schematic diagram of the drafting system of existing cotton spinning frame;

Fig. 2 is a drawing-off schematic diagram of the present invention;

Fig. 3 is the structural representation of the medium rubber roller conjunction among the present invention;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is downside pin frame and the schematic diagram of lacking after downside pin combines;

Fig. 6 is the right view of Fig. 5; Among the figure: the 11-front leather roller; The 12-front roller; 2-medium rubber roller conjunction; The 20-jump ring; The 21-iron roll; The 22-upper leather ring; The 23-top-pin rack; The 24-middle roller; The short downside pin of 25-; 26-downside pin frame; Apron under the 27-; The bayonet socket of 28-top-pin rack; 29-iron roll main shaft; 30-downside pin frame bayonet socket; Roller behind the 31-; The 32-rear roller; The thick cotton yarn of 4-; The thin cotton yarn of 5-; 6-apron tension bracket; The long apron down of 7-; The long downside pin of 8-; 9-disjunctor top-pin rack; The distance at L-front roller center and middle roller center;

The specific embodiment:

Below in conjunction with description of drawings the specific embodiment of the present invention:

The drafting system of cotton spinning frame of the present invention is by the front draft parts, middle drafting unit and first break draft parts three parts are formed, the front draft parts are made up of front leather roller 11 and front roller 12, the first break draft parts are made up of back roller 31 and rear roller 32, middle drafting unit is then by medium rubber roller conjunction 2, middle roller 24, short downside pin 25, downside pin frame 26 and following apron 27 are formed, medium rubber roller conjunction 2 is again by iron roll 21, top-pin rack 23 and upper leather ring 22 are formed, top-pin rack 23 is installed on the main shaft 29 of iron roll 21 by two bayonet sockets 28 on it, and compress by the jump ring on it 20, upper leather ring 22 is sleeved on the jaw of iron roll 21 and top-pin rack 23, short downside pin 25 is installed on the downside pin frame 26, and following apron 27 is sleeved on the jaw of middle roller 24 and short downside pin 25; Downside pin frame 26 by on it bayonet socket 30 fixedly on the iron roll main shaft 29; Centre-to-centre spacing L is 38mm between front roller 12 and the middle roller 24, and the thickness b of following apron 27 is 1.1mm, and the thickness a of upper leather ring 22 is 0.9mm.

Claims

1, a kind of drafting system of cotton spinning frame, by the front draft parts, middle drafting unit and first break draft parts three parts are formed, the front draft parts are made up of front leather roller (11) and front roller (12), the first break draft parts are made up of back roller (31) and rear roller (32), it is characterized in that: middle drafting unit comprises medium rubber roller conjunction (2), middle roller (24), short downside pin (25), downside pin frame (26) and following apron (27), medium rubber roller conjunction (2) is by iron roll (21), top-pin rack (23) and upper leather ring (22) are formed, upper leather ring (22) is sleeved between the jaw of iron roll (21) and top-pin rack (23), top-pin rack (23) is installed on the iron roll main shaft (29) by two bayonet sockets (28) on it, and is compressed by the jump ring (20) on the top-pin rack (23); Short downside pin (25) is installed on the downside pin frame (26), and following apron (27) is sleeved between the jaw of middle roller (24) and short downside pin (25); Centre-to-centre spacing is 35mm～39mm between front roller (12) and the middle roller (24).

2, according to the drafting system of the described cotton spinning frame of claim 1, it is characterized in that: the centre-to-centre spacing between described front roller (12) and the middle roller (24) is 38mm, and the thickness b of following apron (27) is greater than the thickness a of upper leather ring (22).