CN107956005B

CN107956005B - Cotton type silage comes unstuck special licker-in of ramie fibre and combs card clothing

Info

Publication number: CN107956005B
Application number: CN201810030699.4A
Authority: CN
Inventors: 张圣男; 裴泽光; 杨建平; 张斌; 郁崇文
Original assignee: Donghua University
Current assignee: Donghua University
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2020-06-30
Anticipated expiration: 2038-01-12
Also published as: CN107956005A

Abstract

The invention relates to cotton type silage degumming ramie fiber special licker-in carding card clothing, which comprises a card clothing base part and card teeth uniformly distributed on the card clothing base part, wherein the card teeth are configured by arc tooth tips and shallow teeth in a low density mode, the working angle of the card teeth is 65-75 degrees, the tooth tip thickness is 0.20-0.22 mm, the tooth root thickness is 0.32mm, the tooth depth is 3.30-3.50 mm, the density of the card teeth is 26-28 teeth/square inch, the thickness of the card clothing base part is 0.63-0.65 mm, and the height of the base part is 1.30-1.40 mm. The needle teeth of the invention adopt shallow teeth and low density configuration and smaller working angle, which is beneficial to effective pre-carding of cotton type ensiling degummed ramie fibers, can not cause the filling of the tooth gaps of the needle teeth and heavy load between the teeth, avoids the accumulation of the fibers at the bottom of the needle teeth and the damage to the needle teeth, and is also suitable for the situation when the licker-in runs at high speed.

Description

Cotton type silage comes unstuck special licker-in of ramie fibre and combs card clothing

Technical Field

The invention belongs to the technical field of carding card clothing on textile carding machinery, and particularly relates to a special licker-in carding card clothing for cotton type ensiling degummed ramie fibers.

Background

Carding is a critical process in textile processing, and card clothing is an important carding element of a carding machine, and has a direct influence on carding effects, such as fiber separation and damage degree. The licker-in card clothing acts as a pre-carding, reducing the cross-direction connections between the fibers. The selection of the card clothing is related to the properties of the fibres.

In recent years, the technology of ensiling degumming ramie is popularized, and the equipment for preparing the ramie byproduct ensilage feed and the anaerobic environment thereof are utilized to realize the degumming of ramie fibers, thereby meeting the requirements of processing degradable ramie fiber films such as a ramie film, a ramie seedling raising film and the like. It has the advantages of reducing degumming cost and pollution, and achieves the purposes of improving benefit and protecting environment.

Compared with chemical degumming, the ensiling degumming ramie technology has the advantages of more residual gum, incomplete degumming, rough and hard hand feeling, high strength, fiber fineness of 600-1800 Nm generally, residual gum rate of 10% or even higher, and can be used for textile application through proper processing, including meeting the application requirements of agricultural mulching films.

The length uniformity of the ensiling degumming ramie is poor, the longest fiber length can reach about 450mm, and the average fiber length is only about 60 mm. Therefore, the ensiling degummed ramie fibers are usually cut into cotton fibers with a length of 30-50 mm, and then carded on a carding machine.

The Chinese patent application for 'special licker-in rack for refined jute tangle fiber' patent No. CN1664190A, patentee: university of east China. The needle teeth provided by the patent are densely configured by double front angles or triple front angles, left and right double-arc curved surfaces and small teeth. The method has the defects that the method is suitable for processing the fibers with the fineness of more than 1800Nm, and when the method is used for carding the fibers with the fineness of 600-1800 Nm, needle points are easy to abrade, card clothing is damaged, the fibers are damaged, pre-carding and transferring cannot be smoothly carried out, and the yarn quality is influenced.

Chinese utility model patent application "a special metal card clothing of polyimide fiber" patent grant publication No. CN204251794U, patentee: jiangsu Paidi textile science and technology company. Because polyimide fiber is soft, length is longer, can appear seriously winding the phenomenon of card clothing at the carding in-process, the card clothing that this patent provided adopts the plane setting of 90 ~ 93 operating angle and prong top, can effectively avoid the emergence of polyimide fiber winding card clothing phenomenon and the damage of card clothing, guarantees its carding effect. Although the plane setting on prong top can reduce the damage of card clothing prong to a certain extent, because cotton type ensiling ramie fibre is crude and hard, the plane setting on prong top leads to the junction to have the edges and corners, can not play the effect of protection prong and fibre well at high-speed carding in-process, need adopt the circular arc setting, finds through the experiment moreover that prong wearing and tearing degree and fibrous carding effect are relevant with circular arc radius, circular arc angle and inclination. In addition, the card clothing provided by this patent has a large working angle of the teeth and cannot hold and comb the cotton type ensilaged degummed ramie fibers effectively.

Disclosure of Invention

The invention aims to solve the technical problem of providing a special licker-in carding card clothing for cotton type silage degumming ramie fibers, and solves the problems that the raw materials are the cotton type silage degumming ramie fibers, and the fibers are coarse and hard, high in strength and difficult to comb due to the existence of colloid among the fibers.

The technical scheme adopted by the invention for solving the technical problems is as follows: the cotton type carding card clothing with the licker-in special for the ramie fibers subjected to ensiling and degumming comprises a card clothing base part and card teeth uniformly distributed on the card clothing base part, wherein the card teeth are configured by arc tooth tips and shallow teeth in a low-density mode, the working angle of the card teeth is 65-75 degrees, the tooth tip thickness is 0.20-0.22 mm, the tooth root thickness is 0.32mm, the tooth depth is 3.30-3.50 mm, the density of the card teeth is 26-28 teeth/square inch, the thickness of the card clothing base part is 0.63-0.65 mm, and the height of the base part is 1.30-1.40 mm.

The further technical scheme of the invention is that the circle center of the tooth tip arc in the arc tooth tip configuration is arranged at the position apart from the tooth bottom 7/8 and the center of the tooth front tooth back, the arc radius of the tooth tip arc is 0.43-0.50 mm, the arc angle is 2-5 degrees, and the central arc point tangent angle is 16-30 degrees.

The invention also adopts the technical scheme that the fineness of the cotton type silage degumming ramie fiber carded by the licker-in carding card clothing is 600-1800 Nm.

Advantageous effects

The invention has the advantages that:

1. the needle teeth adopt shallow teeth and low density configuration and smaller working angle, which is beneficial to effective pre-carding of cotton type ensiling degummed ramie fibers, does not cause filling of tooth gaps of the needle teeth and heavy load between the teeth, avoids the accumulation of fibers at the bottom of the needle teeth and damages to the needle teeth, and is also suitable for the situation when the licker-in runs at high speed;

2. the cotton type ensiling degumming ramie fiber is coarse and hard, and the tooth tip adopts the configuration of the circular arc thick tooth, so that the damage of the tooth tip and the fiber is avoided.

Drawings

FIG. 1 is a schematic front view of the present invention.

Fig. 2 is a side cross-sectional view of the present invention.

Fig. 3 is a partial enlarged view of the rounded tip of the present invention.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1

As shown in fig. 1-3, a card clothing for carding cotton type ensiling degummed ramie fiber, a card clothing base 2 and needle teeth 1 uniformly distributed on the card clothing base 2, wherein the needle teeth 1 are configured by arc teeth tips and shallow teeth in a low density, a working angle α of the needle teeth 1 is 65 °, a tooth tip thickness b is 0.20mm, a tooth tip arc radius r is 0.50mm, an arc angle e is 3 °, a central arc point cutting angle sigma is 30 °, a tooth root thickness c is 0.32mm, a tooth depth h is 3.50mm, a density of the needle teeth is 26 teeth/square inch, a base thickness w is 0.63mm, a base height d is 1.30mm, the cotton type ensiling degummed ramie fiber with a fiber fineness of 1000Nm is used as a fiber raw material, a fiber drop rate is 15%, and the fiber is fully pre-carded and transferred.

The cotton type silage degumming ramie fiber with the fineness of 1000Nm is carded by adopting the conventional carding machine licker-in card clothing, because the fiber contains 10 percent or even higher residual gum rate, the teeth points of the card clothing are sharp, the tooth density is higher, some fibers are easy to be broken, the fiber damage is more, and the fiber falling rate reaches 28 percent. The fiber is easy to fill in the tooth gaps, and the impurity removing effect is poor.

Example 2

As shown in fig. 1-3, a special licker-in card clothing for ensiling degummed ramie, a card clothing base 2 and needle teeth 1 uniformly distributed on the card clothing base 2, wherein the card clothing adopts a low density configuration of circular arc tooth tips and shallow teeth, the working angle α of the needle teeth 1 is 70 degrees, the tooth tip thickness b is 0.22mm, the circular arc radius r of the tooth tips is 0.46mm, the circular arc angle epsilon is 3 degrees, the central arc point cutting angle sigma is 23 degrees, the tooth root thickness c is 0.32mm, the tooth depth h is 3.50mm, the density of the needle teeth is 27 teeth/square inch, the base thickness w is 0.65mm, the base height d is 1.40mm, the cotton type ensiling degummed ramie with the fiber fineness of 1200Nm is used as a fiber raw material, the fiber yield is 13%, and the fibers are fully pre-carded and transferred.

The cotton type silage degumming ramie fiber with the fineness of 1200Nm is carded by adopting the conventional carding machine licker-in card clothing, because the fiber contains 10 percent or even higher residual gum rate, the teeth points of the card clothing are sharp, the teeth density is higher, some fibers are easy to be broken, the fiber damage is more, and the fiber falling rate reaches 26 percent. The fiber is easy to fill in the tooth gaps, and the impurity removing effect is poor.

Example 3

As shown in fig. 1-3, a special licker-in card clothing for ensiling degummed ramie, a card clothing base 2 and needle teeth 1 uniformly distributed on the card clothing base 2, wherein the card clothing adopts a low density configuration of circular arc tooth tips and shallow teeth, the working angle α of the needle teeth 1 is 75 degrees, the tooth tip thickness b is 0.21mm, the circular arc radius r of the tooth tip is 0.45mm, the circular arc angle epsilon is 4 degrees, the central arc point cutting angle sigma is 18 degrees, the tooth root thickness c is 0.32mm, the tooth depth h is 3.40mm, the density of the needle teeth is 27 teeth/square inch, the base thickness w is 0.64mm, the base height d is 1.37mm, the cotton type ensiling degummed ramie fiber with the fiber fineness of 1400Nm is used as a fiber raw material, the fiber yield is 12%, and the fiber is fully pre-carded and transferred.

The cotton type silage degumming ramie fiber with the fineness of 1400Nm is carded by adopting the conventional carding machine licker-in card clothing, because the fiber contains 10 percent or even higher residual gum rate, the teeth points of the card clothing are sharp, the tooth density is higher, some fibers are easy to be broken, the fiber damage is more, and the fiber falling rate reaches 25 percent. The fiber is easy to fill in the tooth gaps, and the impurity removing effect is poor.

Claims

1. The cotton type carding card clothing special for the silage degumming ramie fibers comprises a card clothing base part (2) and card teeth (1) uniformly distributed on the card clothing base part (2), and is characterized in that the card teeth (1) are configured in a manner of low density of arc tooth tips and shallow teeth, the working angle (α) of the card teeth (1) is 65-70 degrees, the tooth tip thickness (b) is 0.21-0.22 mm, the tooth root thickness (c) is 0.32mm, the tooth depth (h) is 3.30-3.50 mm, the density of the card teeth (1) is 26-28 teeth/square inch, the thickness (w) of the card clothing base part (2) is 0.63-0.65 mm, and the base part height (d) is 1.30-1.40 mm.

2. The licker-in card clothing special for cotton type ensiled degummed ramie as claimed in claim 1, wherein: the circle center of the tooth tip arc in the arc tooth tip configuration is arranged at the position apart from the tooth bottom 7/8 and the center of the tooth back before the tooth, the arc radius (r) of the tooth tip arc is 0.43-0.50 mm, the arc angle (epsilon) is 2-5 degrees, and the central arc point tangent angle (sigma) is 16-30 degrees.

3. The licker-in card clothing special for cotton type ensiled degummed ramie as claimed in claim 1, wherein: the fineness of the cotton type ensiling degumming ramie fiber combed by the licker-in carding card clothing is 600-1800 Nm.