Large-pitch deep-tooth reticulate pattern middle and lower roller

Abstract

The utility model belongs to the field of spinning frame rollers, and particularly relates to a large-pitch deep-tooth reticulate pattern middle-lower roller which is arranged in a spinning frame, a plurality of diamond reticulate patterns which are tightly arranged are arranged on the middle-lower roller, the pitch t of the reticulate pattern tooth form of the working face of the middle-lower roller is 1.45-1.50 mm, the tooth form angle beta is 90-100 degrees, the tooth top width b is 0.35-0.47 mm, the tooth depth h is 0.40-0.45 mm, and the reticulate pattern prismatic angle alpha is 41 degrees. According to the utility model, a deep-tooth large-pitch large rhombic reticulate pattern working surface tooth shape, tooth bottom and tooth side are matched with the lower leather ring, so that the friction force is increased, the problem of insufficient yarn drafting force caused by insufficient holding force of a middle and lower roller jaw of a spinning frame is solved, the relative count error of yarns is reduced, and the quality of resultant yarns is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the spinning frame, and particularly relates to a large-pitch deep-tooth net-shaped middle and lower roller. BACKGROUND

[0002] At present, the working surface tooth shape of the middle and lower roller in the spinning frame is small-pitch dense-tooth net-shaped tooth shape, as shown in Figure 1 In the machining process, the bending deformation and roundness have great influence on the consistency of the tooth shape, the tooth shape burr, the inconsistency of the tooth top width and the diagonal, and the spiral deflection angle is generated, the holding force of the nip formed by the bearing of the middle and lower roller of the spinning frame, the apron and the middle roller is insufficient, the press of the cradle is large, the relative count error of the yarn is large, and the yarn quality is affected. The technical parameters of the existing dense-tooth net-shaped middle and lower roller are as follows: the pitch t is 1.81-1.83 mm, the tooth shape angle β is 90-95°, the tooth top width b is 0.35-0.45 mm, the tooth depth h is 0.30-0.40 mm, and the net-shaped edge angle α is 35-41°. CONTENT OF THE UTILITY MODEL

[0003] The present application solves the technical problem of the prior art, and provides a large-pitch deep-tooth net-shaped middle and lower roller. The net-shaped tooth shape of the middle and lower roller can be optimized, the relative count error of the yarn caused by the insufficient holding force of the nip formed by the bearing of the middle and lower roller of the spinning frame, the apron and the middle roller is solved, the draft force on the yarn is improved, and the yarn quality is improved.

[0004] The technical scheme of the present application is as follows: the large-pitch deep-tooth net-shaped middle and lower roller is arranged in the spinning frame, a plurality of closely arranged rhombic net-shaped patterns are arranged on the middle and lower roller, the pitch t of the net-shaped tooth shape of the working surface of the middle and lower roller is 1.45-1.50 mm, the tooth shape angle β is 90-100°, the tooth top width b is 0.35-0.45 mm, the tooth depth h is 0.40-0.45 mm, and the net-shaped edge angle α is 41°.

[0005] Compared with the prior art, the present application has the following beneficial effects:

[0006] The large-pitch deep-tooth net-shaped middle and lower roller adopts deep-tooth large-pitch, large-rhombic net-shaped working surface tooth shape, the friction force between the tooth bottom, the tooth side and the lower apron is increased, the relative count error of the yarn caused by the insufficient holding force of the nip of the middle and lower roller of the spinning frame is solved, the press of the cradle is reduced, and the yarn quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0008] Figure 1 is the tooth profile of the existing middle and lower roller;

[0009] Figure 2 is Figure 1 A-A sectional view of

[0010] Figure 3 is a structural schematic view of the present application;

[0011] Figure 4 is the tooth profile of the present application;

[0012] Figure 5 is Figure 3 A-A sectional view of DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0014] Since the working surface tooth profile of the middle and lower roller in the current spinning frame is small-pitch dense meshed tooth profile, the gripping force of the nip formed by the middle and lower roller bearing, the apron and the middle roller is insufficient, the swing frame pressure is large, which causes large yarn relative count error and affects the yarn quality. In view of this, the present application provides a large-pitch deep-tooth meshed middle and lower roller, which can increase the gripping force of the nip of the middle and lower roller of the spinning frame, reduce the yarn relative count error, reduce the swing frame pressure, and improve the yarn quality.

[0015] As Figure 1 , Figure 2As shown, the technical parameters of the working tooth profile of the middle and lower rollers in existing spinning machines are: pitch t1 = 1.81~1.83mm, tooth angle β1 = 90°~95°, tooth tip width b1 = 0.35~0.45mm, tooth depth h1 = 0.30~0.40mm, and rhombus angle α1 = 35°~41°. The working surface of this type of middle and lower roller is made by a yarn rolling machine of model ZA28-20. Because this model of yarn rolling machine only applies force on one side, it cannot accurately process the rhombus angle of the diamond pattern on the middle and lower roller. Moreover, because the pitch of this middle and lower roller is relatively large, the friction between it and the yarn is relatively small. The properties of the yarn processed using this middle and lower roller are as follows:

[0016] Table 1

[0017] Number CVm% - 50% / km + 50% / km Mean 12.37 1.8 19.8 CV 1.9 153.9 82.2 S 0.24 2.8 16.3 Q95 0.08 0.9 5.5 Max 12.95 10 97.5 Min 11.86 0 0

[0018] In the table, CVm is the coefficient of variation of the yarn, -50% is the yarn fineness index at 50%, +50% is the yarn coarseness index at 50%, CV is the yarn evenness, S is the standard deviation of yarn quality, and Q95 is the ratio of the average weight of the lightest 5% segment to the overall average weight.

[0019] like Figures 3-5 As shown, a large-pitch deep-tooth knurling roller is installed in a spinning frame. The lower roller 1 has multiple closely arranged diamond-shaped knurling patterns. The pitch t of the knurling teeth on the working surface of the lower roller 1 is 1.45–1.50 mm, the tooth angle β is 90°–100°, the tooth tip width b is 0.35 mm–0.45 mm, the tooth depth h is 0.40–0.45 mm, and the knurling angle α is 41°. The working surface of this lower roller is manufactured by a high-precision CNC knurling machine (model TB-S30CNC), which can accurately process the knurling angles of the diamond patterns on the lower roller 1, reducing the pitch of the knurling on the working surface of the lower roller 1 and increasing the friction between it and the yarn. The specifications of the yarn processed using this lower roller 1 are as follows:

[0020] Table 2

[0021] Number CVm% - 50% / km + 50% / km Mean 12.37 1.1 17.2 CV 1.7 166.3 73.8 S 0.21 1.8 12.7 Q95 0.07 0.6 4.3 Max 12.81 7.5 75 Min 12 0 2.5

[0022] As can be seen from Tables 1 and 2, the standard deviation of yarn evenness and yarn quality processed by the large-pitch deep-tooth mesh lower roller provided in this application is smaller than the standard deviation of yarn evenness and yarn quality processed by the lower roller in the prior art. The smaller the standard deviation of yarn evenness and yarn quality, the better the yarn evenness and the higher the quality. Therefore, this application improves the yarn quality.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large pitch deep tooth grating middle and bottom roller provided in a spinning frame, characterized in that, The middle and lower roller is provided with a plurality of closely arranged diamond-shaped net patterns, the pitch t of the net pattern tooth shape on the working surface of the middle and lower roller is 1.45-1.50 mm, the tooth shape angle β is 90-100°, the tooth top width b is 0.35-0.45 mm, the tooth depth h is 0.40-0.45 mm, and the net pattern edge angle α is 41°.

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