CN104537214A - 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

The defining method of the total number of teeth of a kind of cotton comber integral cylinder

Technical field

The present invention relates to the technical field of Combing, specifically relate to the defining method of the total number of teeth of a kind of cotton comber integral cylinder.

Background technology

Combing cylinder is the main carding element on cotton comber, its effect utilizes the pin tooth on cylinder to carry out combing to feeding rouleau, to get rid of cotton knot, impurity and staple fibre, and the stretching of fiber in yarn, parallel and degree of separation can be improved, its carding effect has material impact to yarn quality.The total number of teeth of cylinder is very few, and pin tooth is insufficient to cotton clump combing, and yarn is second-rate, can not meet the process requirements of high-grade yarn.The total number of teeth of cylinder is too much, means that the gap between cylinder pin tooth and pin tooth reduces, and cause the appearance fibre amount of cylinder pin between cog in carding process to reduce, and the surface fibre that nipper is gripped is not easy to be combed, and affects carding quality; The damage of fiber can be caused simultaneously, increase cotton noils rate, the processing and manufacturing difficulty of cylinder pin tooth is increased, affect the serviceable life of cylinder.

How according to total numbers of teeth of overall target determination cotton comb cylinder such as fiber species, combing parameters, in prior art, lack effective method, thus give the design of the total number of teeth of cotton comber integral cylinder, selecting of cylinder cause difficulty.

Summary of the invention

The object of the invention is to overcome the defining method that above technical matters proposes the total number of teeth of a kind of cotton comber integral cylinder, it utilizes Cylinder Carding degree, fiber linear density, rouleau line density, to cotton length, is separated the technological parameter such as to space to determine total number of teeth of cotton comber integral cylinder, for the design of combing machine whole tin tips provides Theory and technology to support with selecting.

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

(2) number of fiber M in cotton layer is determined: wherein, T _x, T _ybe respectively the average linear density of fiber and rouleau, a is the linters rate of combing machine;

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

Describedly comprise to cotton mode to advance to cotton and retreat to one or both in cotton.

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

1. a fiber in combing machine working cycle by card wire number of teeth z is: wherein, Z is the total number of teeth of cylinder;

2., in a working cycle, by Cylinder Carding once, often through a working cycle, forward impelling one is given cotton length A to the fiber bundle that nipper grips by feed roll motor, then advance to recarding times N time cotton suffered by fiber ₁for: retreating to recarding number of times time cotton suffered by fiber is N ₂: wherein, B is that separation is spaced, and δ is the dead space length of nipper;

3. advance to cotton Carding Degree C ₁for: retreat to cotton Carding Degree C ₂for: $C_2=z_2\×N_2=\frac{Z_2}{M}\×(\frac{B-\mathrm{\δ}}{A}+1).$

The cotton total tooth number Z of cylinder is given in described advance ₁for: retreat to cotton Z ₂for: $Z_2=\frac{C_2\×M\×A}{B-\mathrm{\δ}}.$

Cotton Carding Degree C is given in described advance ₁numerical range be: C ₁=0.2-0.27, retreats to cotton Carding Degree C ₂numerical range be C ₂=0.4-0.57 is 4.3-5.9mm to the numerical range of cotton length A, and the numerical range being separated the B that spaces is 20-26mm.

The present invention utilizes a fiber in combing machine working cycle to set up the mathematical model of Cylinder Carding degree by the recarding number of times suffered by the card wire number of teeth and fiber, and utilize the line density of fiber linear density, rouleau, to cotton length, be separated the technological parameter such as to space and determine to advance to cotton and retreat to total number of teeth of cotton comber integral cylinder under cotton mode, for the design of combing machine whole tin tips provides Theory and technology to support with selecting.

Embodiment

Below in conjunction with embodiment, the present invention is further illustrated.

Embodiment 1

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

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

Acting on intensity on fiber to evaluate combing cylinder, have employed the index of Carding Degree, it be defined as a fiber from combing to the pin number of teeth being completely segregated suffered Cylinder Carding.Under the condition not considering cotton noils rate, a fiber in combing machine working cycle 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, and M is the radical of fiber in cotton layer.

In a working cycle, by Cylinder Carding once, then often through a working cycle, forward impelling one is given cotton length to the fiber bundle that nipper grips by feed roll motor.Can obtain thus, advance to cotton and retreat to recarding times N time cotton suffered by fiber ₁, N ₂be respectively:

$N_1=\frac{B-\mathrm{\δ}}{A}---\left(2\right)$

$N_2=\frac{B-\mathrm{\δ}}{A}+1---\left(3\right)$

In formula, A is to cotton length, and B is that separation is spaced, and δ is the dead space length of nipper.

Carding Degree be a fiber from combing to the pin number of teeth being completely segregated suffered Cylinder Carding, a fiber namely in a working cycle is by the product of the card wire number of teeth and suffered recarding number of times.Therefore, advance to cotton and retreat to cotton Carding Degree C ₁, C ₂be respectively:

$C_1=z_1\×N_1=\frac{Z_1}{M}\×\frac{B-\mathrm{\δ}}{A}---\left(4\right)$

$C_2=z_2\×N_2=\frac{Z_2}{M}\×(\frac{B-\mathrm{\δ}}{A}+1)---\left(5\right)$

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

C can be obtained according to Combing Quality requirement and production practices ₁and C ₂empirical value scope be respectively: C ₁=0.2-0.27, C ₂=0.4-0.57 is 4.3-5.9mm to the scope of cotton length A, and the scope being separated the B that spaces is 20-26mm.

(2) the radical M of fiber in cotton layer is determined.

If T _x, T _ybe respectively the average linear density (tex) of fiber and rouleau, then, under the condition not considering Fiber Straightness and deduction cotton noils rate, in rouleau cross 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.

Concerning 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) the total number of teeth of combing machine whole tin tips is determined.

Formula (4) and formula (5) abbreviation are out of shape advance to cotton and retreat to the cotton total tooth number Z of cylinder ₁, Z ₂be respectively:

$Z_1=\frac{C_1\×M\×A}{B-\mathrm{\δ}}---\left(7\right)$

$Z_2=\frac{C_2\×M\×A}{B-\mathrm{\δ}+A}---\left(8\right)$

The radical M of fiber in the cotton layer obtained in step (2) substitution formula (7) and formula (8) can be obtained, must advance to cotton and retreat to the cotton total tooth number Z of cylinder ₁the cotton total tooth number Z of cylinder is given with retrogressing ₂.

Embodiment 2

Be the defining method advanced to combing machine whole tin tips total number of teeth time cotton to cotton mode, its determining step is as follows:

(1) spinning linters rate a according to the requirement of spinning quality is 10% low-grade combed yarn, gets Carding Degree C according to production experience ₁be 0.21.

(2) number of fiber M in cotton layer is calculated.Concerning medium staple cotton, the line density of fiber gets 0.15tex, and for HC500 type combing machine, the line density of lap gets 60000tex, then in Cylinder Carding process, the number of fiber M in combing rouleau cross section is:

(3) determining the total number of teeth of cylinder, for HC500 type combing machine, is 5.2mm to cotton length A value, and the dead space length δ of nipper is 3mm, and being separated B value of spacing is 20mm, then obtain the total tooth number Z of cylinder by formula (7) ₁for:

Embodiment 3

Be retreat the defining method to combing machine whole tin tips total number of teeth time cotton to cotton mode, its determining step is as follows:

(1) spinning linters rate a according to the requirement of spinning quality is 22% quality combed yarn, gets Carding Degree C according to production experience ₂be 0.52.

(2) number of fiber M in cotton layer is calculated.Concerning medium staple cotton, the line density of fiber gets 0.15tex, and for HC500 type combing machine, the line density of lap gets 70000tex, then in Cylinder Carding process, the number of fiber M in combing rouleau cross section is:

(3) determine the total number of teeth of cylinder, for HC500 type combing machine, to cotton length value 4.3mm, the dead space length δ of nipper is 3mm, and being separated B scope of spacing is value 26mm, then obtain the total tooth number Z of cylinder by formula 7 ₂for:

The present invention according to the line density of the Cylinder Carding degree in fiber species, combing parameter, fiber linear density, rouleau, to cotton length, be separated the technological parameter such as to space and comprehensively determine the total number of teeth of cotton combing cylinder, can provide theory support to the design of the total number of teeth of cotton comber integral cylinder, selecting of cylinder.

The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (5)

1. a defining method for the total number of teeth of cotton comber integral cylinder, it is characterized in that, step is as follows: (1) is according to the mathematical model of setting up combing cylinder Carding Degree to cotton mode;

(2) number of fiber M in cotton layer is determined: wherein, T _x, T _ybe respectively the average linear density of fiber and rouleau, a is the linters rate of combing machine;

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

2. the defining method of the total number of teeth of cotton comber integral cylinder according to claim 1, is characterized in that, describedly comprises to cotton mode to advance to cotton and retreat to one or both in cotton.

3. the defining method of the total number of teeth of cotton comber integral cylinder according to claim 1 and 2, the described method setting up the mathematical model of combing cylinder Carding Degree is:

1. a fiber in combing machine working cycle by card wire number of teeth z is: wherein, Z is the total number of teeth of cylinder;

2., in a working cycle, by Cylinder Carding once, often through a working cycle, forward impelling one is given cotton length A to the fiber bundle that nipper grips by feed roll motor, then advance to recarding times N time cotton suffered by fiber ₁for: $N_1=\frac{B-\mathrm{\δ}}{A},$ Retreating to recarding number of times time cotton suffered by fiber is N ₂: $N_2=\frac{B-\mathrm{\δ}}{A}+1;$ Wherein, B is that separation is spaced, and δ is the dead space length of nipper;

3. advance to cotton Carding Degree C ₁for: retreat to cotton Carding Degree C ₂for: $C_2=z_2\×N_2=\frac{Z_2}{M}\×(\frac{B-\mathrm{\δ}}{A}+1).$

4. the defining method of the total number of teeth of cotton comber integral cylinder according to claim 3, is characterized in that, the cotton total tooth number Z of cylinder is given in described advance ₁for: retreat to cotton Z ₂for: $Z_2=\frac{C_2\×M\×A}{B-\mathrm{\δ}}.$

5. the defining method of the total number of teeth of cotton comber integral cylinder according to claim 4, is characterized in that, cotton Carding Degree C is given in described advance ₁numerical range be: C ₁=0.2-0.27, retreats to cotton Carding Degree C ₂numerical range be C ₂=0.4-0.57 is 4.3-5.9mm to the numerical range of cotton length A, and the numerical range being separated the B that spaces is 20-26mm.