CN104537214B - Determination method for total tooth number of whole cylinder of cotton combing machine - Google Patents

Abstract

A determination method for the total tooth number of a whole cylinder of a cotton combing machine comprises the following steps: (1) establishing a mathematical model of a combing degree of the cylinder of the combing machine according to a cotton feeding manner; (2) determining the number M of fibers in a cotton layer according to the formula: M=Ty/Tx*(1-a), wherein Tx and Ty are average linear densities of fibers and small rolls and a is a cotton dropping rate of the combing machine; and determining the total tooth number of the whole cylinder of the combing machine. The mathematical model of the combing degree of the cylinder is established by the tooth number of a fiber combed needle in a working cycle and the repeated combing times of the fibers through the combing machine, and the total tooth number of the whole cylinder of the cotton combing machine is determined under a forward cotton feeding manner and a backward cotton feeding manner by utilizing process parameters including the linear density of the fibers, the linear density of the small rolls, the cotton feeding length, a separation distance and the like; theoretical and technical supports are provided for designing and selecting the whole cylinder of the combing machine.

Description

A kind of determination method of the total number of teeth of cotton comber integral cylinder

Technical field

The present invention relates to the technical field of Combing, specifically it is related to a kind of total number of teeth of cotton comber integral cylinder Determine method.

Background technology

Combing cylinder is the main carding element on cotton comber, its effect be using the pin tooth on cylinder to feed Enter rouleau and carry out combing, to exclude cotton knot, impurity and chopped fiber, and the stretching of fiber in yarn, parallel and separating degree can be improved, Its carding effect has a major impact to yarn quality.The total number of teeth of cylinder is very few, and pin tooth is insufficient to cotton clump combing, yarn quality Poor, can not meet the process requirements of high-grade yarn.The total number of teeth of cylinder excessive it is meant that gap between cylinder pin tooth and pin tooth Reduce, cause the fine amount of appearance of cylinder pin between cog in carding process to reduce, and make the surface fibre that nipper grips be not easy to be combed Thoroughly, affect carding quality；The damage of fiber, the processing and manufacturing difficulty increasing cotton noils rate, making cylinder pin tooth can be caused simultaneously Increase, the service life of impact cylinder.

How the total number of teeth of cotton comb cylinder, existing skill are determined according to aggregative indicatores such as fiber species, combing parameters Effective method is lacked, thus causing difficulty to the design of the total number of teeth of cotton comber integral cylinder, the selection of cylinder in art.

Content of the invention

The purpose of the present invention is the determination overcoming above technical problem to propose a kind of total number of teeth of cotton comber integral cylinder Method, its using Cylinder Carding degree, fiber linear density, rouleau line density, to cotton length, separate the technological parameter such as gauge and determine Total number of teeth of cotton comber integral cylinder, the design for combing machine whole tin tips provides theoretical and technical support with selecting.

In order to achieve the above object, the present invention adopts the following technical scheme that: a kind of total number of teeth of cotton comber integral cylinder Determination method, step is as follows: (1) is according to the mathematical model setting up combing cylinder Carding Degree to cotton mode；

(2) determine number of fiber m in cotton layer:Wherein, t_x、t_yIt is respectively the average of fiber and rouleau Line density, a is the linters rate of combing machine；

(3) determine the total number of teeth of combing machine whole tin tips.

Described include advancing to cotton and retreating to one of cotton or two kinds to cotton mode.

The method of the described mathematical model setting up combing cylinder Carding Degree is:

1. a fiber in one cycle of operation of combing machine by card wire number of teeth z is:Wherein, z is the total tooth of cylinder Number；

2. in a cycle of operation, nipper grip fibre bundle by Cylinder Carding once, often through a cycle of operation, Forward impelling is given cotton length a for one by feed roll motor, then advance to the recarding frequency n suffered by fiber during cotton₁For:Retreating to the recarding number of times suffered by fiber during cotton is n₂:Wherein, b be separate every Away from δ is the dead space length of nipper；

3. the Carding Degree c advancing to cotton₁For:Retreat to the Carding Degree c of cotton₂For: $c_2=z_2\×n_2=\frac{z_2}{m}\×(\frac{b-\mathrm{\δ}}{a}+1).$

Described total number of teeth z of cylinder advanced to cotton₁For:Retreat to cotton z₂For: $z_2=\frac{c_2\×m\×a}{b-\mathrm{\δ}}.$

The described Carding Degree c advancing to cotton₁Numerical range be: c₁=0.2-0.27, retreats to the Carding Degree c of cotton₂Number Value scope is c₂=0.4-0.57, the numerical range to cotton length a is 4.3-5.9mm, and the numerical range separating gauge b is 20- 26mm.

The present invention is subject to repeating suffered by the card wire number of teeth and fiber using a fiber in one cycle of operation of combing machine Carding times set up the mathematical model of Cylinder Carding degree, and using fiber linear density, the line density of rouleau, to cotton length, separate The technological parameters such as gauge advance to cotton to determine and retreat to total number of teeth of cotton comber integral cylinder under cotton mode, are combing machine The design of integral cylinder provides theoretical and technical support with selecting.

Specific embodiment

With reference to embodiment, the present invention is further illustrated.

Embodiment 1

A kind of determination method of the total number of teeth of cotton comber integral cylinder, step is as follows:

(1) according to the mathematical model setting up combing cylinder Carding Degree to cotton mode；

Act on intensity on fiber to evaluate combing cylinder, employ the index of Carding Degree, it is defined as one Fiber is from beginning combing to the pin number of teeth being completely segregated suffered Cylinder Carding.Under conditions of not considering cotton noils rate, A fiber in one cycle of operation of combing machine by card wire number of teeth z is:

$z=\frac{z}{m}---\left(1\right)$

In formula: z is the total number of teeth of cylinder, m is the radical of fiber in cotton layer.

In a cycle of operation, the fibre bundle that nipper grips by Cylinder Carding once, then often follows through a job Ring, forward impelling is given cotton length for one by feed roll motor.Thus can obtain, advance to cotton with retreat to the weight suffered by fiber during cotton Multiple carding times n₁、n₂It is respectively as follows:

$n_1=\frac{b-\mathrm{\δ}}{a}---\left(2\right)$

$n_2=\frac{b-\mathrm{\δ}}{a}+1---\left(3\right)$

In formula, a is to cotton length, and b is to separate gauge, and δ is the dead space length of nipper.

Carding Degree is a fiber from starting combing to the pin number of teeth being completely segregated suffered Cylinder Carding, i.e. a work A fiber in circulating is subject to the product of the card wire number of teeth and suffered recarding number of times.Therefore, advance to cotton and retrogressing Carding Degree c to cotton₁、c₂It is respectively as follows:

$c_1=z_1\×n_1=\frac{z_1}{m}\×\frac{b-\mathrm{\δ}}{a}---\left(4\right)$

$c_2=z_2\×n_2=\frac{z_2}{m}\×(\frac{b-\mathrm{\δ}}{a}+1)---\left(5\right)$

Can be obtained by formula (4), formula (5), the card wire on cylinder is more, card wire is stronger to the effect of fiber； The fiber simultaneously combed is fewer, and active force on each fiber for the card wire is bigger.

Required according to Combing Quality and production practices can obtain c₁And c₂Empirical value scope be respectively as follows: c₁=0.2-0.27, c₂=0.4-0.57, the scope to cotton length a is 4.3-5.9mm, and the scope separating gauge b is 20-26mm.

(2) determine the radical m of fiber in cotton layer.

If t_x、t_yIt is respectively the average linear density (tex) of fiber and rouleau, then do not considering Fiber Straightness and deduction essence Under conditions of comb linters rate, in rouleau section, the radical m of fiber is:

$m=\frac{t_y}{t_x}\×(1-a)---\left(6\right)$

In formula: a is the linters rate (%) of combing machine.

For medium staple cotton, the linear density range of fiber is 0.143-0.222tex, and the linear density range of lap is 55000-75000tex.

(3) determine the total number of teeth of combing machine whole tin tips.

Formula (4) and formula (5) abbreviation are deformed must advance to cotton with retreat to total number of teeth z of cylinder of cotton₁、z₂It is respectively as follows:

$z_1=\frac{c_1\×m\×a}{b-\mathrm{\δ}}---\left(7\right)$

$z_2=\frac{c_2\×m\×a}{b-\mathrm{\δ}+a}---\left(8\right)$

In the cotton layer that will obtain in step (2), the radical m of fiber substitutes into formula (7) and formula (8) can get, and must advance to cotton With retreat to cotton total number of teeth z of cylinder₁With retreat to cotton total number of teeth z of cylinder₂.

Embodiment 2

A kind of is the determination method advanced to the total number of teeth of combing machine whole tin tips during cotton to cotton mode, and it determines step such as Under:

(1) the requirement spinning linters rate a according to spinning quality is 10% low-grade combed yarn, takes comb according to production experience Reason degree c₁For 0.21.

(2) calculate number of fiber m in cotton layer.For medium staple cotton, the line density of fiber takes 0.15tex, to hc500 type essence For comb, the line density of lap takes 60000tex, then during Cylinder Carding, the number of fiber m in combing rouleau section is:

(3) determine the total number of teeth of cylinder, for hc500 type combing machine, be 5.2mm to cotton length a value, the dead space of nipper is long Degree δ is 3mm, and separating gauge b value is 20mm, then obtain total number of teeth z of cylinder by formula (7)₁For:

Embodiment 3

A kind of is to retreat to the determination method of the total number of teeth of combing machine whole tin tips during cotton to cotton mode, and it determines step such as Under:

(1) the requirement spinning linters rate a according to spinning quality is 22% quality combed yarn, takes comb according to production experience Reason degree c₂For 0.52.

(2) calculate number of fiber m in cotton layer.For medium staple cotton, the line density of fiber takes 0.15tex, to hc500 type essence For comb, the line density of lap takes 70000tex, then during Cylinder Carding, the number of fiber m in combing rouleau section is:

(3) determine the total number of teeth of cylinder, for hc500 type combing machine, to cotton length value 4.3mm, dead space length δ of nipper For 3mm, separating gauge b scope is value 26mm, then obtain total number of teeth z of cylinder by formula 7₂For:

The present invention can be close according to the line of the Cylinder Carding degree in fiber species, combing parameter, fiber linear density, rouleau Spend, comprehensively determine the total number of teeth of cotton combing cylinder to technological parameters such as cotton length, separation gauges, to the total tooth of cotton comber integral cylinder The design of number, the selection of cylinder provide theory support.

The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Enclose and be defined.

Claims (3)

1. a kind of determination method of the total number of teeth of cotton comber integral cylinder is it is characterised in that step is as follows:

(1) according to the mathematical model setting up combing cylinder Carding Degree to cotton mode；When being to advance to cotton to cotton mode, set up The method of the mathematical model of combing cylinder Carding Degree is:

1. a fiber in one cycle of operation of combing machine is subject to card wire number of teeth z₁For:Wherein, z₁For advancing to cotton The total number of teeth of cylinder, m is number of fiber in cotton layer；

2. in a cycle of operation, nipper grip fibre bundle by Cylinder Carding once, often through a cycle of operation, to cotton Forward impelling is given cotton length a for one by Lora, then advance to the recarding frequency n suffered by fiber during cotton₁For:Wherein b is to separate gauge, and δ is the dead space length of nipper；

3. the Carding Degree c advancing to cotton₁For:

(2) determine number of fiber m in cotton layer:Wherein, t_x、t_yIt is respectively fiber close with the average line of rouleau Degree, a is the linters rate of combing machine；

(3) determine total number of teeth z of cylinder that combing machine advances to cotton₁For:

2. a kind of determination method of the total number of teeth of cotton comber integral cylinder is it is characterised in that step is as follows:

(1) according to the mathematical model setting up combing cylinder Carding Degree to cotton mode；When being to retreat to cotton to cotton mode, set up The method of the mathematical model of combing cylinder Carding Degree is:

1. a fiber in one cycle of operation of combing machine is subject to card wire number of teeth z₂For:Wherein, z₂For retreating to cotton The total number of teeth of cylinder, m is number of fiber in cotton layer；

2. in a cycle of operation, nipper grip fibre bundle by Cylinder Carding once, often through a cycle of operation, to cotton Forward impelling is given cotton length a for one by Lora, then retreating to the recarding number of times suffered by fiber during cotton is n₂:Wherein, b is to separate gauge, and δ is the dead space length of nipper；

3. retreat to the Carding Degree c of cotton₂For:

(2) determine number of fiber m in cotton layer:Wherein, t_x、t_yIt is respectively fiber close with the average line of rouleau Degree, a is the linters rate of combing machine；

(3) determine that combing machine retreats to total number of teeth z of cylinder of cotton₂For:

3. the determination method of the total number of teeth of cotton comber integral cylinder according to claim 1 and 2 is it is characterised in that described The Carding Degree c advancing to cotton₁Numerical range be: c₁=0.2-0.27, retreats to the Carding Degree c of cotton₂Numerical range be c₂= 0.4-0.57, the numerical range to cotton length a is 4.3-5.9mm, and the numerical range separating gauge b is 20-26mm.