CN101294311A - Reuse method for spinning nozzle - Google Patents

Abstract

The reuse method of spinning nozzle comprises the following steps: detaching a spinning nozzle from a spinning machine, and wrapping with oil cloth; preserving the spinning nozzle wrapped with oil cloth in a low-temperature environment lower than 20 DEG C; transferring the spinning nozzle from the low-temperature environment to normal-temperature environment, and balancing; and arranging the balanced spinning nozzle on the spinning machine. The spinning nozzle has the advantages of high reuse efficiency, low starting and stopping cost, etc.

Description

The method that re-uses of spinneret cap

Technical field

The present invention relates to the method that re-uses of spinneret cap in the method that re-uses of spinneret cap in fiber or the long filament production process, particularly cigarette acetate silk production process.

Background technology

Because of having good physical index and excellent harmful substance cut-off filter, tradition adopts acetate fiber (CA) tow as the cigarette filter material.Usually, acetate silk production is with acetone, vinegar sheet and wood pulps, water, titanium dioxide and formulated the flowed slurries of mineral wet goods, and extrude by the spinneret cap of spinning machine pressurization back after filtration, again through after be processed to form cigarette acetate silk.Be needing of spray silk, spinneret cap has a large amount of spinneret orifices, for the output of the per unit area that makes spinneret cap for maximum, the density of spinneret orifice is constantly increase also.But because of slurries have certain viscosity, therefore stop as spinning machine, the spinneret cap on the spinning machine need all disassemble, and after cleaning, detect with acetone, re-uses when to be driven.

There is following defective in the method that re-uses of above-mentioned spinneret cap: one, cleaning amount is big, cleans the cost height.The use amount of spinneret cap is quite big, with a medium scale acetate silk factory is example, four to five of nearly spinning machines, every spinning machine has about 300 of spinneret caps, so parking needs the spinneret cap of cleaning nearly individual surplus in the of 1000 whenever, all cleaned and needed 40 hours consuming time, consumed 2000 kilograms in acetone.Two, acetone highly volatile is especially in the higher south of temperature.After the acetone volatilization, slurries residual on the spinneret cap solidify in spinneret orifice, cause spinneret cap to re-use rate lower, only about 30%, about 70% spinneret cap can not reuse, and causes great waste usually.Three, spinneret cap whether available common need be installed on the spinning machine and can confirm through debugging, because of spinneret cap to re-use rate lower, need a plurality of spinneret caps of debugging just can leave a spinneret cap position, the rate that re-uses with about 30% is calculated, spinning machine need to drive the spinneret cap of about 900 of debugging, labor intensive not only, and prolonged the time of driving, influence the driving progress greatly, increased the driving cost.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method that re-uses of spinneret cap, can improve the rate that re-uses of spinneret cap, and workload, driving cost when reducing the start-stop car shorten the driving required time.

For addressing the above problem, technical scheme provided by the invention is: the method that re-uses of spinneret cap comprises: will wrap with oilcloth from the spinneret cap that spinning machine takes off; To be kept at the spinneret cap that oilcloth is wrapped again in the low temperature environment that temperature is lower than 20 ℃; Spinneret cap shifted out from low temperature environment place balance under the normal temperature; Spinneret cap after the balance at normal temperatures is mounted on the spinning machine after fastening again.

So-called normal temperature means 25 ± 5 ℃.

Preferred scheme is: spread one deck light viscosity oil earlier before spinneret cap is taken off from spinning machine.

Preferred scheme is: the spinneret cap that shifts out from low temperature environment carries out sealing and balancing at normal temperatures.

Preferred scheme is: carry out earlier fastening before being installed in spinneret cap on the spinning machine once more on clamping bench.

Preferred scheme is: before the spinneret cap that will wrap with oilcloth places low temperature environment, will pack in the freshness protection package with the spinneret cap that oilcloth is wrapped earlier, and sealing.

Preferred scheme is: spinneret cap balance time at normal temperatures is 5-7 hour.

Preferred scheme is: the temperature of low temperature environment is less than 10 ℃.

Preferred scheme is: the temperature of low temperature environment is between-5-5 ℃.

Preferred scheme is: light viscosity oil is a W crude oil.

Preferred scheme is: the oil on the oilcloth also is light viscosity oil.

The speed of molecule random motion and temperature have absolute relation, and the volatilization of acetone has related to molecular motion equally, and the mean kinetic energy of molecular motion is only relevant with temperature:

$\stackrel{\‾}{W}=\frac{2}{3}\mathrm{KT}$

In the formula: the W-mean kinetic energy; The K-Boltzmann constant; T-absolute temperature.Be that low molecular weight actin is can more little volatile quantity few more more for temperature.The method that re-uses of above-mentioned spinneret cap has utilized molecule sluggish principle under low-temperature condition to preserve online and standby spinneret cap exactly.Temperature is low more, and the acetone volatilization on the spinneret cap of pulling down from production line is just few more, and slurries just are not easy to solidify in the spinneret cap hole, and it is big that reusable ability becomes.Therefore improve the rate that re-uses of spinneret cap, reduced the workload of debugging spinneret cap when stopping, improved driving efficient, reduced the driving cost.In addition,, need not acetone and clean, also can save a large amount of cleaning costs re-using in the process of above-mentioned spinneret cap.

The specific embodiment

Below in conjunction with preferred forms of the present invention the present invention is described in detail.

When spinning machine stops, upright this spread one deck light viscosity oil with the spinneret cap on the spinning machine, as W crude oil, then spinneret cap is taken off fast and wrap with W crude oil oilcloth, install in the freshness protection package, and squeeze out the interior air of freshness protection package, and pull on sealing strip, the refrigerator-freezer that places temperature to be lower than 20 ℃ then carries out low temperature and preserves.In order to take and to put conveniently, in the aluminium box of the freshness protection package that spinneret cap is housed can being packed into, and then will fill the neat temperature that is placed in of the aluminium box of spinneret cap and be lower than and carry out low temperature in 20 ℃ the refrigerator-freezer and preserve.

Before spinning machine is driven once more, in earlier spinneret cap being got from refrigerator-freezer, placed under the normal temperature balance 5-7 hour, deliver to then that to carry out secondary on the spinneret cap clamping bench fastening, can be mounted on the spinning machine afterwards to reuse.

Because the volatilization degree of acetone is relevant with temperature and time, the low temperature storage temperature is low more, and the acetone volatilization is slow more, and the low temperature holding time is short more, and the acetone volatilization is few more.Therefore the low temperature storage temperature is low more, and the rate that re-uses of spinneret cap is high more.The low temperature holding time is short more, and the rate that re-uses of spinneret cap is high more.Usually the low temperature storage temperature is controlled at below 10 ℃ better, preferably be controlled at-5-5 ℃ between.The low temperature holding time of spinneret cap is unsuitable long, is advisable to be no more than 10 days usually, otherwise can reduces the rate that re-uses of spinneret cap.In addition, under the situation that the long-time low temperature of need is preserved, should suitably reduce the temperature that low temperature is preserved, as: when the low temperature storage life needed 10 days, the Controllable Temperature that low temperature is preserved was built in-5-0 ℃, and this moment, the rate that re-uses of spinneret cap also can reach 45%.

Table one is listed in different storage temperature conditions and the contrast and experiment of spinneret cap operating position under the holding time.

The contrast and experiment one of table one spinneret cap operating position

As can be seen from Table I, spinneret cap low temperature after wrapping up with oilcloth is preserved, and it re-uses rate and reaches as high as 85% when reusing, and compares the spinneret cap that re-uses after traditional acetone is cleaned, and the rate that re-uses of spinneret cap is greatly improved.Take this, not only can reduce the discarded rate of spinneret cap, reduced waste, saved cost, and because of spinneret cap re-uses the raising of rate, the spinneret cap quantity of debugging during driving is reduced significantly, workload in the time of can effectively reducing spinning machine start-stop car, the driving speed of raising spinning machine.In addition, low temperature preservation again after spinneret cap adopts oilcloth to wrap up need not to clean again with acetone, not only can save the acetone of a large amount of cleaning usefulness, reduces start-stop car cost, and has saved a large amount of cleanings, has reduced labour intensity.

Spinneret cap is mounted in the process of balance on the spinning machine, can not open freshness protection package, is placed directly in balance under the normal temperature, i.e. sealing and balancing; Spinneret cap can also be taken out from freshness protection package, place balance under the normal temperature environment again, can be described as unlimited balance with respect to sealing and balancing.

Volatile because of acetone, therefore equilibration time length at normal temperatures also can influence the rate that re-uses of spinneret cap.

Table two illustrates the comparative test result that spinneret cap under different poised states and the equilibration time re-uses rate.

Table two spinneret cap re-uses rate comparative test result two

As can be seen from Table II, compare unlimited balance, the sealing and balancing effect is better.Adopt the rate that re-uses of the spinneret cap of sealing and balancing to exceed about 10% than the rate that re-uses that adopts the spinneret cap that opens wide balance.

Can find out also that from table two equilibration time was advisable with 5-7 hour usually, it is that the rate that re-uses of 8 hours spinneret caps exceeds about 20% than equilibration time.This be because, overlong time, acetone volatilizees easily.But equilibration time is also unsuitable too short, and the equilibration time of spinneret cap is not enough.

Describe when of the present invention at the reference most preferred embodiment, persons skilled in the art will recognize that:, may make various modification, variation, omission and replacement not departing under the spiritual principles of the present invention.For example, the temperature of the low temperature environment in the above-mentioned example and balance time are not limited to the scope that provides among the embodiment, as long as their obtained effects are identical, these simple variations still belong to protection scope of the present invention.

Claims (10)

1, the method that re-uses of spinneret cap comprises:

To wrap with oilcloth from the spinneret cap that spinning machine takes off;

To be kept at the described spinneret cap that oilcloth is wrapped in the low temperature environment that temperature is lower than 20 ℃;

Described spinneret cap shifted out from low temperature environment place balance under the normal temperature;

Described spinneret cap after the balance at normal temperatures is mounted on the spinning machine.

2, according to the method that re-uses of the described spinneret cap of claim 1, it is characterized in that:

Before being taken off from spinning machine, described spinneret cap spreads one deck light viscosity oil earlier.

3, according to the method that re-uses of the described spinneret cap of claim 2, it is characterized in that:

The described spinneret cap that shifts out from low temperature environment ties up to and carries out sealing and balancing under the normal temperature.

4, according to the method that re-uses of the described spinneret cap of claim 3, it is characterized in that:

On clamping bench, carry out earlier fastening before being installed in described spinneret cap on the spinning machine.

5, according to the method that re-uses of the described spinneret cap of claim 4, it is characterized in that:

Before the described spinneret cap that will wrap with oilcloth places low temperature environment, will pack in the freshness protection package with the described spinneret cap that oilcloth is wrapped earlier, and sealing.

6, according to the method that re-uses of each described spinneret cap of claim 1 to 5, it is characterized in that:

Described spinneret cap balance time at normal temperatures is 5-7 hour.

7, according to the method that re-uses of the described spinneret cap of claim 6, it is characterized in that:

The temperature of described low temperature environment is less than 10 ℃.

8, according to the method that re-uses of the described spinneret cap of claim 7, it is characterized in that:

The temperature of described low temperature environment is between-5 ℃-5 ℃.

9, the method that re-uses of described spinneret cap according to Claim 8 is characterized in that:

Described light viscosity oil is a W crude oil.

10, according to the method that re-uses of the described spinneret cap of claim 9, it is characterized in that:

Oil on the described oilcloth also is light viscosity oil.