JPS6242749B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for polishing flat needles installed in a flat type carding machine, and particularly relates to a method for polishing flat needles installed in a flat type carding machine, and in particular, polishing a flat bar or flat needles installed on a carding machine or a flat bar or flat needles disposed on a carding machine. This invention relates to a re-polishing method in which the needle cloth with the needles implanted therein is fixedly supported by a regulation holding member, the tips of the flat needles are aligned, and the working portions of the tips are ground sharply to restore the carding effect of the needles. be.

The combing action of fibers in a flat carding machine is mainly performed by the sharp ends of clothing needles and blade-shaped wires attached to the circumference of the cylinder, and by the flat needles and blades embedded in the clothing attached to the flat bar. This is done with the pointed end of the shaped member. Clothes are often used as a member to be attached to the flat bar. By the way, in order to maintain a good combing effect, it is necessary to make the tip heights of these blades and needle members the same and to keep the tips sharp.Especially, the tips of flat needles need to be kept on the cylinder side, which moves at high speed. It is installed opposite to the blade-shaped member and moves at a very low speed with an extremely small gap while catching and combing the fibers, so it is prone to wear and tear, and when it wears out, the combing action immediately decreases and neps (clumps of fibers) are removed. It becomes impossible to remove enough leaf residue from the fibers. Therefore, polishing of flat needles is carried out, and the polishing device is attached to the carding machine, and the polishing device is attached to the carding machine, and the polishing device is attached to the carding machine. There is an under-table polishing needle that uses a special polishing device, and the former type, an on-machine polishing needle, uses a hose roller (traverse wheel) or long roller, and a device (grinding bracket) for attaching these polishing devices. Each carding machine is provided in advance. In addition, long rollers and sometimes grinding wheels are used to polish the latter under the table, but these polishing methods are used both to equalize the height of the needles and to sharpen the tips of the needles. . In addition, it is said that under-stand polishing needles are better in terms of polishing quality and accuracy, but it requires labor and time to remove and attach the flat bar from the carding machine. From this point on, the present applicant first invented a needle polishing method in which on-machine polishing needles are comparable to under-table polishing needles, and filed a patent application. However, although it was extremely effective to make the flat needles uniform in height and sharp, the only way to make them sharp was to simply sharpen the tip of the needle head surface (hereinafter simply referred to as the needle head surface) of the flat needle. The area of the needle head surface was expanded by the polishing needle; in other words, the tip of the needle was tapered, and the height was slightly lowered by the polishing needle, so that the area of the needle head surface was expanded by the polishing needle. expands.

On the other hand, in consideration of the combing action, it is desirable that the tip of the needle has a small area and is sharpened (micropointed), and that the tip has a rough peripheral surface so that it can easily catch fibers. However, with the above-mentioned on-machine polishing needles and under-table polishing needles, as described above, the needle head surfaces are aligned and the tips of the surfaces are made sharp, but do not contribute to forming micropoints. In other words, it is a polishing needle for maintaining the combing action of the flat needle,
It was not a polished needle that would bring back flat needles. Therefore, the inventor of the present invention has arrived at the present invention as a result of intensive research into the possibility of creating a polishing needle (grinding polishing needle) that can be made into micropoints, instead of the conventional on-machine polishing needles and under-table polishing needles. The present invention aims to provide a re-polishing method. However, with this invention, in the case of an on-machine polishing needle, the machine base is stopped and only the flat is driven intermittently, and it is supported by a regulating holding member provided at the conventional grinding bracket mounting position, and the under-machine polishing needle is Now, with the flat bar supported as before, a cylindrical rotary abrasive is moved back and forth along the length direction of the flat bar and parallel to the needle head surface of the tip of the implanted flat needle, so that the needle head surface is attached to each needle tip. After forming and aligning the flat bar needles, the grinding disk whose outer periphery tip is formed with an acute angle of an isosceles triangle is rotated so that the needle tip works and falls in the direction of inclination, while actively reciprocating in the longitudinal direction of the flat bar planting needle. The tip side of the flat needle is made to flutter in a sideways direction, and the needle head is activated to make it face down in an inclined direction, so that both sides of the needle head surface and the back end edge are ground into a small curved surface.

The present invention will be explained in detail below based on the drawings, which show an example of a specific implementation of the invention.
The present invention is not limited to these illustrated examples, but can be applied to needles of other shapes or carried out in the same manner by adding other finishing steps to a part of the process. can. FIG. 1 is a schematic diagram of a carding machine, in which a cylinder 1 is provided with a blade-shaped member 1a on its circumference.
is rotating in the direction of the arrow, and the raw material fibers are fed as a wrap from a feed roller 3 and passed to the cylinder 1 while being opened by a take-in roller 2. The fibers scraped off on the circumferential surface of the cylinder 1 are further opened and subjected to a combing action in cooperation with the flat needles of a large number of flats 4 arranged with slight gaps in the upper part of the fibers. The sliver is delivered to the cutting edge of the dosing fur 7 provided on the front side, peeled off by the fly comb 8, and taken out as a sliver by the calender roller 9. The flat bar 4a is shown in Fig. 2 (partial sectional view).
As shown, flat needle 5 (hereinafter simply referred to as needle 5)
The needle 5 is constructed by attaching a piece of clothing embedded in a base fabric 6 to a flat bar 4a. In addition, two needles 5 are bent into a hook shape and implanted through the base fabric 6 (crown), and there are many of these needles lined up in an orderly manner, but since they have the same shape, the following is one of them. I will only talk about books. That is, when manufacturing clothing, the needle 5 is implanted at an angle to one side, as shown in FIG. 4 (side view) and FIG. 5 (right side view of FIG. The knee 5a is formed by bending the lower side of the center part to form a working angle. That is, the needle is formed of a root side 5b and a tip side 5c with the knee 5a as a boundary, and the inclination direction of the tip side 5c is herein referred to as the working inclination direction and the front side of the needle, and the opposite side (Fig. The right side) is called the back side, and the tip side 5c
The upper end is side-polished to form a thin stepped portion 5d, and a small area point 5f is formed on the front side of the top surface, and the back side thereof is a circular curved surface 5e (hereinafter, this portion is referred to as the needle head). ). Various cross-sectional shapes are used for the needle 5, and FIG. 6 shows a so-called T-shaped needle in the direction of arrow A in FIG. A cross-section is shown in FIG. 1, where the cross section is the cross section of the entire needle, and the T-shape is formed by the track-shaped circular needle _5c1 .
Fig. 7 shows an elliptical needle 5c ₂ and Fig. 8 shows a diamond-shaped needle 5c _3, commonly called the F type, in the same way as Fig. 6. There are also flat needles with modified oval shapes, and the present invention can be applied to these flat needles.

On the other hand, as shown in FIGS. 1 and 3 (cross-sectional views), the on-machine polishing needle of such a flat needle has a grinding bracket 1b during the movement trajectory of the flat 4 on the play side.
is provided to hold the flat bar 4a in position, and while rotating the long roller 10 coated with the abrasive material 10a in the direction of the arrow and slightly reciprocating, the needle 5 is
The above-mentioned point 5f is ground. Therefore, since the worn points 5f are ground, the point area is enlarged, and the surface becomes rough and the front edge of the surface becomes sharp, so that the combing action can be maintained, but in such grinding, the point surface is enlarged. This makes it difficult for fibers to be caught, and the rough surface becomes smooth again after a short amount of use. That is, when the F-type needle is new, a point 5f is formed as shown in FIG. 13 (schematic drawing), but due to the polishing needle, it becomes an enlarged surface with point 5f ₁ as shown in FIG. It does not contribute to micropoint formation at all. Furthermore, it has been pointed out that in conventional grinding needles, a beak-like burr 5g tends to occur on the front edge of the grinding point surface, as shown in FIG. 9, which hinders the separation of fibers.

Therefore, in the present invention, the needle tip is first polished using a cylindrical polishing grinder 12 as shown in FIG. 10 in order to equalize the height of the point surface. That is, the flat is temporarily stopped and securely held in position, and the polishing device is configured to traverse the guide rail fixed across the grinding bracket, and the polishing wheel 12 is driven by a drive protruding from the polishing device. It is fixed to a shaft 11 and rotates in the direction of the arrow, and the amount of polishing is adjusted by raising and lowering the device or drive shaft 11. This polishing makes the needle head surface parallel to the flat bar mounting surface. Next, in the present invention, a grinding disk 14 as shown in FIG. 11 is used to perform side surface grinding of the needle head portion. That is, it is recommended that the grinding disk 14 is a grinding disk having an outer peripheral tip 14a formed as an acute angle part of an isosceles triangle, and the tip 14a is a grinding disk with diamond grains arranged thereon. The grinding disk 14 is attached to a drive shaft 13 that protrudes in the length direction of the flat from the polishing device or a drive device configured to be attached to the device.
Like the polishing device described above, it reciprocates in the direction of the arrow along the guide rail. During grinding, the tip of the grinding disk 14 is positioned 1 to 2 mm deeper than the tip surface of the needle and reciprocated. Therefore, the needle 5 is tilted sideways from the state shown by the chain line in FIG. 11 to the state shown by the dashed-dotted line due to the rightward movement of the grinding disk 14, and further moved to the state shown by the solid line 5h.
It undergoes elastic deformation and is brought down, and the side surface of the point is ground as shown by 5i. At the same time, the needle 5h turns forward as shown in FIG. 12, so that the tip of the grinding disk 14 passes through the back side of the point while grinding it, forming a small curved surface 5k. That is, while the back side of the tip of the needle 5 is ground from the state shown by the chain line 5h, it is elastically deformed 5j toward the front as shown by the solid line, and a small curved surface 5k is formed. If these points are shown for the front F-type needle, a point 5g is formed by the polishing whetstone 12 as shown in FIG. (front view) and Fig. 18 (left side view of Fig. 17)
As shown in , there are small curved surfaces 5 on both sides of point 5g.
A small curved surface 5k is also formed on the back side of points i and 5i, and the point 5g can be a micropoint with an extremely small area. Furthermore, these small curved surfaces 5i, 5
Grinding marks by the grinding disk 14 are formed on k as shown in the figure to improve the fiber holding power and revive the combing action of the flat needle group. Furthermore, according to the polishing method of the present invention, a good combing action can be achieved even if the conventional polishing cycle (7 to 10 days) is extended by more than three times, and the occurrence of neps is reduced, and leaf dregs are removed (flats). (adhering to the needle and taking it out) is improved. In an experiment using a carding machine using a flat machine polished according to the present invention, the number of neps (measured by measuring the wafer on a 10 x ² blackboard) after conventional polishing was 7.3, but when the polishing according to the present invention was applied. As a result, we were able to reduce the number of neps to 3.1. In addition, in an experiment on leaf residue adhering to flat needles, 1.95g
(at a specific time) became 2.3g, and it was found that the removal of leaf residue was improved. The needle width of the flat 4 is generally 22 to 27 mm, and the width of the needles of the grinding disk 1 is
Since there are equipment restrictions on the selection of the outer diameter of No. 4, when applying the grinding disk 14, as shown in Fig. 19,
It is sufficient to perform the reciprocating movement in two or three times, and by doing so, all the needles can be made into micropoints almost uniformly, contributing to the improvement of the product.

Of course, the present invention can also be applied to polishing in the manufacturing process of flat clothing.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram explaining the configuration of a carding machine, Fig. 2 is a cross-sectional view explaining the operation of the flat needle and cylinder, Fig. 3 is a cross-sectional view explaining the conventional polishing needle, and Fig. 4 is an enlarged side view of the flat needle. Figure 5 is a right side view of Figure 4, Figure 6 is a cross-sectional view of the arrows and cutting lines of Figure 4, and Figures 7 and 8 are of other cross-sectional shapes. This is an example of a flat needle, and is a sectional view symmetrically shown in Fig. 6, Fig. 9 is a sectional view illustrating conventional polishing, and Fig.
Figure 0 is a planar polishing explanatory diagram showing the first step of the present invention,
Figure 11 is an explanatory diagram of the second step, and Figure 12 is an illustration of the 11th step.
Fig. 13 is a broken diagram showing the diamond-shaped needle in its new condition, Fig. 14 is an explanatory drawing of the worn condition of Fig. 13, and Fig. 15 is a planar view according to the application of the present invention. Polishing, Fig. 16 is a sketch of the state after application of the grinding disk, Fig. 17 is a right side view of Fig. 16, Fig. 18 is a left side view of Fig. 17, and Fig. 19 is an explanation showing an example of the use of the grinding disk. It is a diagram. 1...Cylinder, 2...Take-in roller, 3
3...Feed roller, 4...Flat, 4a...
... Flat bar, 5 ... Flat needle, 6 ... Base fabric, 7 ... Dotted fabric, 8 ... Fly comb, 9 ...
... Calendar roller, 10 ... Polishing roller, 12 ...
...Abrasive whetstone, 14...Grinding disk.

Claims (1)

[Claims] 1 A method of polishing the tips of a group of flat needles that are installed with the tips slanted in the clothing attached to a flat bar. The flat bar supported on the carding member and taken down from the carding machine is supported on a flat needle polishing device, and is shaped into a cylindrical shape parallel to the plane formed by each needle head of the flat needle group and along the length direction of the bracket bar. A rotary polishing wheel is moved back and forth to form and align the needle head surfaces on each needle head, and then a grinding disk whose outer periphery tip is formed with an acute angle of an isosceles triangle is rotated in the direction in which the tip of the flat needle is inclined to grind the flat bar. By actively reciprocating in the length direction, the tips of the flat needles are made to wave in the longitudinal direction of the flat bar, and the needle heads are turned downward in the inclination direction, so that both sides and the back edge of each needle head are shaped into small curved surfaces. A method for reproducing and polishing a flat needle, characterized by grinding it.