CN2139942Y

CN2139942Y - Pressure stick

Info

Publication number: CN2139942Y
Application number: CN 92237397
Authority: CN
Inventors: 柳志强; 林波
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-23
Filing date: 1992-10-23
Publication date: 1993-08-11
Anticipated expiration: 2002-10-23

Abstract

The utility model discloses a pressure stick used for a drawing combing stretching device for the spinning machines. The pressure stick is designed to overcome the defect in the prior art that as the fiber friction of the pressure stick is not uniform, the edge fiber can be controlled easily, and the fiber strips are not even. The working part of lateral length direction of the pressure stick contacted with the fiber forms a concave notch, the control capacity of the edge fiber is effectively increased, and the evenness rate of the fiber strips and the spinning quality is improved. The utility model has the advantages of simple manufacturing process, convenient installation and operation, and accumulative articles automatic removing. The utility model is suitable for the stretching device in the technical field of the spinning.

Description

Pressure stick

The utility model relates to the spinning machinery field, particularly a kind ofly is used for the pressure bar that spinning equipment drafting, combing are stretched oneself and yawn device.

The drawing frame of present domestic use, combing machine, pressure bar as employings such as A272E, A272F, SDFA304, DF746, DF/2-W, owing to be about to the edge fiber of contact work with pressure bar before stretching oneself and yawn in the zone and the friction field of median fiber is considered as uniformity, so existing pressure bar contacts not contact portion of working portion and two ends with fiber, on the lateral length direction of pressure bar external form, be straight line, so common pressure bar outer mold surface is a straight cylindrical surfaces.But in real work, because side-friction circle in mid portion fiber and the two edges fiber movement is inhomogeneous, intermediate friction power is bigger, two edges are less, grip the fiber bed thickness lateral variation at jaw place before causing, thick middle, both sides are thin, in the process of stretching oneself and yawn, edge fiber speed change point on the pressure bar is ahead of median fiber again, so existing straight cylindrical surfaces pressure bar can not be controlled effectively, gather the edge fiber, thereby cause the dried evening ratio of bar in drafting or the combing process to worsen, the spinning broken end occurs.Though adopted the soft elastic glue roller in recent years, the control of stretching oneself and yawn the edges of regions fiber is made moderate progress, can not thoroughly overcome the edge fiber that causes because of side-friction the is inhomogeneous situation that influences the dried evening ratio of bar out of control.

The purpose of this utility model is to design a kind of can effectively control and stretches oneself and yawn areal pressure rod top edge fiber movement, improves the novel pressure rod of dried evening ratio of ribbon and spinning quality.

The utility model is achieved in that outer mold surface on pressure bar lateral length direction, contact working portion with fiber movement makes the matrix breach, and this matrix breach has the plane of symmetry, and the horizontal line of the plane of symmetry and pressure bar lateral length direction is perpendicular.Lateral dimension between the upper shed of described matrix breach is greater than the concave bottom surface lateral dimension, and these matrix breach two sides are with being connected of concave bottom surface and seamlessly transit shape, and concave bottom surface is plane or curved surface with certain curvature.Pressure bar bulk shape face can be cylindric, oblate column, or an oval cylinder and the tangent shape of tapered plane with constant slope, this kernel of section angle, face of cylinder is less than 90 °, the inclined-plane gradient is less than 1/2, this inclined-plane is tangent at oval cylinder top edge bus place, the matrix breach that contacts working portion with fiber movement is by going out perpendicular to the shape of falling the isosceles trapezoid punch punching out on this inclined-plane, and matrix two sides and concave bottom surface are the plane, and have knuckle to connect.The matrix breach that contacts work on the pressure bar with fiber can mill out or punching out forms.According to using needs, the matrix breach on the pressure bar can have one or more.Pressure bar length can be decided according to the equipment situation, but the longitudinal cross-section greatest width dimension of pressure bar is no more than 120mm.It can be steel (round steel, steel plates) that pressure bar uses material, also can be the engineering plastics with certain intensity and rigidity, rubber-like, but unlikely aging, distortion.

The utility model is compared with existing pressure bar has following characteristics: processing technology is simple, and is easy to install, and the dried evening ratio of ribbon is improved more than 3%, and can be from the long-pending flower of row.

The embodiment of SDFA304 drawing frame with pressure bar now is described in detail in detail in conjunction with the accompanying drawings.

Fig. 1 is the pressure bar front view,

Fig. 2 is the vertical view of pressure bar,

Fig. 3 is the right view of pressure bar,

Fig. 4 is the partial view of the vertical bevel direction A of pressure bar,

Fig. 5 is the pressure bar working state schematic representation.

Pressure bar is stamped to form with the thick 45# steel plate of 2mm, the external cylindrical surface radius is 8mm, be 1/10 in the tangent inclined-plane gradient in bus place, the face of cylinder, top with it, the matrix of pressure bar on the fiber movement direction is to be formed by the shape of falling the isosceles trapezoid punch punching out perpendicular to the inclined-plane, and its manufacture craft flow process is as follows:

(1) blanking: 45#, 2mm steel plate, length 255mm, width 40mm(once become two pressure bars);

(2) mark in length and breadth to center line, go out two matrixs at the center punch die, matrix opening size 114, recessed dark 7.44mm, the concave bottom size is less than 114mm, and the matrix both sides are the plane, the knuckle 10mm of two sides and concave bottom; Regulate stud bolt hole, length direction centre-to-centre spacing 235 ± 0.04, width centre-to-centre spacing 14.88mm at four jiaos of pressure bar two ends of going out 4-∮ 6H8 simultaneously.

(3) stamp out external form.Outside cylinder radius 8mm, inclined-plane gradient 1/10;

(4) punching, longitudinally center line becomes two matrix pressure bars;

(5) abate deburring;

(6) the external cylindrical surface polishing reaches

(7) electroplate;

(8) check warehouse-in.

Installing and using, bolts at two ends adjusting place adds two profiling parallels and gets final product.

Claims

1, the device pressure bar is stretched oneself and yawn in a kind of spinning equipment drafting, combing, it is characterized in that outer mold surface on the described pressure bar lateral length direction contacts working portion and is the matrix breach with fiber movement, described matrix notch geometry is symmetrical, and the plane of symmetry is vertical with the horizontal line of pressure bar lateral length direction.

2, by the described pressure bar of claim 1, it is characterized in that lateral dimension between the upper shed of described matrix breach greater than the concave bottom surface lateral dimension, matrix breach two sides are with being connected of concave bottom surface and seamlessly transit shape, and concave bottom surface is curved surface.

3, by claim 1 or 2 described pressure bars, it is characterized in that pressure bar the lateral length direction outer mold surface of fiber input be the kernel of section angle less than 90 ° oval cylinder and gradient less than 1/2 rectangular plane at the tangent shape in oval cylinder top edge bus place, outer mold surface on the described pressure bar lateral length direction contacts working portion with fiber movement matrix breach is by going out perpendicular to the shape of falling the isosceles trapezoid punch punching out of described pressure bar external form tapered plane, matrix two sides and concave bottom surface are the plane, and have knuckle to connect.

4,, it is characterized in that outer mold surface on the pressure bar lateral length direction contacts working portion with fiber matrix breach is having on the pressure bar more than one by claim 1 or 2 described pressure bars.

5,, it is characterized in that the longitudinal cross-section greatest width dimension≤120mm of pressure bar by the described pressure bar of claim 1.

6,, it is characterized in that described pressure bar uses material as steel or have working strength and the engineering plastics of rigidity, rubber-like by claim 1,2 described pressure bars.