JPH0450259B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention involves applying a sizing agent to a large number of filaments spun from a bushing, converging them into one or several strands, and then winding them through a traversing device. A winding device for glass fiber strands which is wound onto a tube to directly form a package, in particular a winding device in which two winding collets are mounted diametrically opposite to each other on a rotatably supported turret, one of which is Place it in the take-up position and wind the strand. When the take-up tube is full, rotate the turret 180 degrees and bring the other collet with the empty take-up tube fitted into the take-up position to wind up the strand. This invention relates to a winding device that continuously performs winding work by transferring the winding tube from one winding tube to an empty winding tube.

"Prior Art" The above-mentioned continuous winding device for glass fiber has a waist strand winding section at the tip of each winding collet, and when replacing the winding tube, the strand is fitted from a full winding tube. The waste strand is then transferred to the waist strand winding section of the winding collet in which the empty winding tube is fitted, and then to the waist strand winding section of the winding collet into which the empty winding tube is fitted. In this way, the waist strand winding section is configured such that the strand, which is wrapped around the waist strand winding sections of both collets, is automatically separated from a full collet under the tension that naturally increases as both collets rotate. It is configured. In this continuous winding device, it is important that the strand is automatically cut and that the waist strand winding section on the side of the empty winding tube reliably grips the tip of the strand after cutting. Various efforts have been made.

For example, the winding collet disclosed in JP-A No. 52-5309 has a truncated conical strand guide surface formed at the waist strand winding portion at the tip, and the guide surface faces toward the guide surface near the small-diameter end of the guide surface. Fixing members such as pins, hooks, guide plates, etc. that protrude from the winding tube are provided, and the strand transferred to the waist strand winding part of the collet into which the empty winding tube is fitted is guided in a frusto-conical shape by the action of winding tension. As the strand moves toward the smaller diameter side on the surface and just before reaching the end, it gets caught on the fixed member, and as a result of the increase in tension generated as both the take-up collets continue to rotate, the strand is cut with the fixed member at the corner. It is configured to

Furthermore, the winding collet disclosed in JP-A No. 57-175665 has a frusto-conical strand guide surface formed in the waist strand winding portion, and an annular strand protruding in the radial direction at the small diameter end of the guide surface. A strand stop wall is provided, and the surface of the stop wall is removed in at least one place radially inward from the guide surface to form a crescent-shaped flat part, and opposite to the flat part, the end of the guide surface is removed. Several parallel grooves are formed in the crescent-shaped wall surface formed on the side of the guide surface in a direction perpendicular to the diameter of the guide surface, and the strands are cut as in the case of JP-A No. 52-5309. It moves to the small diameter side on the conical guide surface, falls into one of the parallel grooves, is gripped by the groove, rotates with the collet, and is cut at the corner of the groove under the increasing tension as the collet rotates. .

``Problems to be Solved by the Invention'' The device disclosed in JP-A-52-5309 has the disadvantage that the fixing member often fails to capture the strand because the strand is captured and cut at one point. The fixing member has the disadvantage that it is easily worn out because it is intensively subjected to repeated friction from the strands.

The device disclosed in JP-A-57-175665 is JP-A-52-175665.
Although this product has been improved to eliminate the above-mentioned drawbacks of No. 5309, sizing agent dregs and filament debris tend to accumulate in the gap between the opposing crescent-shaped flat parts and the grooves, making it difficult to stop the device from time to time to clean it. The problem is that you have to do it.

Furthermore, in all of the conventional devices described above, it is important to adjust the relationship between the circumferential speeds of the full-pipe collet and the empty collet so that an appropriate tension is applied to the strand between the two collets. If the circumferential speed of the empty collet is smaller than or equal to the circumferential speed of the collet on the full tube side, the strand will not wind at the winding section on the empty collet side, or the strand will be completely cut off before winding. Tarishi,
Migration of strands to the empty collect side often fails.

Furthermore, since the above-mentioned conventional device cuts the strand in a manner that tears it off, fuzz is likely to occur in the filament during cutting, and this fuzz can cause the filament being spun to be cut from the bushing, or cause damage to the surroundings of the winding machine. There were problems such as the accumulation of fluff, which worsened the working environment.

``Means for Solving the Problems'' In order to solve the problems of the conventional device described above, the present invention provides a method for improving the collection-side side wall of the circumferential groove formed on the circumferential surface of the waist strand winding section at the tip of the winding collet. A truncated cone-shaped strand guide surface is inclined toward the bottom surface of the circumferential groove, and the guide surface is cut in the axial direction of the collet in a portion close to the bottom surface of the circumferential groove to form an annular recess. The present invention is characterized in that a blade forming an acute angle over the entire circumference is formed between the tip of the guide surface and the recess.

``Operation'' In the present invention, when an empty collet is brought to the winding position, the strand taken up by this collet contacts the bottom of the circumferential groove of the waist strand winding part over a certain angle, and then the strand is turned into a full tube. When going out toward the collet, it comes into contact with a blade formed at the tip of the guide surface and is cut. This cutting is done almost instantaneously because the blade rotates at high speed, but each filament is cut little by little with a slight time lag, and the cut filament wraps around the bottom of the circumferential groove. This allows a sufficient wrapping angle to be obtained before the last filament is cut. In this way, winding of the strand progresses at the same time as cutting occurs, so that winding of the strand can be accomplished in a short time.

"Example" Figures 3 and 4 are schematic diagrams showing a pattern in which glass filaments spun from a bushing by a continuous winding device for glass fiber strands to which the present invention is applied are directly formed on a strand package. be. A large number of glass filaments 2 spun from a bushing 1 pass through a sizing agent coating device 3 and a sizing roller 4 to be converged into a single strand 5, which is then wound around a winding tube 6 while being traversed by a traversing device (not shown) to form a package. is formed.
The take-up tube 6 is fitted into a take-up collet 8 which is mounted on a rotatably supported turret 7 and driven to rotate. Two winding collets 8' are installed, and when the winding pipe 6 is full,
The turret 7 is rotated 180 DEG in the direction of the arrow a to bring the collet 8', in which the empty winding tube 6' is fitted, into the winding position. A waist strand winding section 9 is formed at the tip of each winding collet, and a strand guide rod 10 is formed at the start of winding and when the winding tube is full.
moves forward to transfer the strand 5 to the waist strand winding section 9.

The waist strand winding section 9 has an aluminum ring member 11 as shown in FIGS. 1 and 2.
The collet 8 is fixed to the end surface of the collet 8 by inserting bolts 14 into several holes 13 formed in a flange 12 integrally projecting radially inward at the end on the collet side. The ring member 11 is the collect 8
A circumferential groove 15 having an inverted trapezoidal cross section and opposite side walls having a truncated cone shape is formed on the outer circumferential surface of the groove. The side wall 16 on the collet 8 side guides the strand transferred from the take-up tube fitted to the collet 8 through the strand guide rod 10 into the bottom surface 17 of the circumferential groove 15.
The strand guide surface 16 is cut in the axial direction before reaching the bottom surface 17 of the circumferential groove to form an annular recess 18.
A blade 19 forming an acute angle over the entire circumference is formed between the tip of the guide surface 16 and the recess 18. In this embodiment, the ring member 11 is made of aluminum in order to reduce the weight, but for reasons to be described later, the guide surface 11 is formed at two locations facing each other on the diameter line.
6 is formed by a hardened stainless steel blade member 20. Each blade member 20 is inserted from the outside into a corresponding hole formed in the strand guide surface 16 and fixed by two cap screws 21. The opening at the center of the flange 12 is covered with a cap cover 22 and fixed with screws 23.

The waist strand winding section 9 of the present invention is constructed as described above and operates as follows. As shown in FIG. 5a, the winding collet 8 at the winding position on the turret 7 rotates in the direction of arrow b, and the glass fiber strand 5 is wound onto the surface of the winding tube 6 fitted thereon. When the tube is full, the strand guide rod 10 moves forward to transfer the strand 5 from the winding tube 6 to the waist strand winding section 9 (see FIG. 4). Next, the winding collet 8' into which the empty winding tube has been fitted is rotated in the direction of arrow c, and at the same time the turret 7 is rotated 180 DEG in the direction of arrow a, thereby changing the positions of both collets as shown in FIG. 5b. The take-up collet 8 is rotated at a reduced speed at this point. In this way, the strand 5 to be wound onto the waist strand winding section 9 of the winding collet 8 is wound up via the waist strand winding section of the winding collet 8' brought to the winding position. The strand 5 passing through the waist strand winding section of the winding collet 8' contacts the strand guide surface 16 of the waist strand winding section 9 of the winding collet 8' and is guided by the winding tension received from the full tube collection 8. It moves toward the small diameter side along the surface 16 and falls into the bottom surface 17 of the circumferential groove 15 (the first
(see figure). The strand 5 is attached to the bottom surface 17 of the circumferential groove 15
After contacting the guide surface over a certain angle, the guide surface 17 leaves the bottom surface 17 and as it moves toward the full tube collector 8, it comes into contact with the blade 19 at the tip of the guide surface and is cut. This cutting appears to be done almost instantaneously because the blade 19 is rotating at high speed, but each filament is cut little by little with a slight time lag, and the cut part is separated from the circumferential groove. Since it wraps around the bottom, a sufficient wrapping angle can be obtained before the last filament is cut.

The present invention provides a blade 19 formed over the entire circumference.
Since the strands are cut at one point, there is less wear compared to conventional methods that cut at one point. However, if the diameter of the collet is small, a sufficient effect can be obtained by making the entire ring member 11 from stainless steel and subjecting it to hardening treatment. The material of the blade portion 19 wears out relatively quickly, making it impossible to cut smoothly. In the above embodiment, as a countermeasure against this problem, a part of the strand guide surface 16 that faces each other on the diameter line is constructed with a blade member 20 made of a hard material, so that wear of the blade portion 19 can be avoided, and as a result, troubles due to inability to cut can be avoided. can.

Although the embodiment described above has two take-up collects on the turret 7, it will be clear that the invention is equally applicable to those having three or more collects.

"Effects of the Invention" In the present invention, the points of contact friction for cutting the strands are not concentrated at one point but are distributed over the entire circumference, which reduces wear and allows the cut strands to be wound around the waist strand winding section. In addition, the frequent cleaning of the waist strand winding section as in the conventional method is no longer necessary, and the reliability of the automatic winding replacement work can be increased.

Further, according to the present invention, as shown in FIG. 5b, the transition time from when the waist strand winding portion of the empty winding collet 8' contacts the strand until the cutting and winding is completed is short, within about 1 second. Furthermore, since the strands are cut using a sharp blade, unlike the conventional method of tearing, there is little generation of fuzz, which greatly improves the working environment.

Furthermore, in the past, for thick strands such as directly wound roving with porous bushings such as 2000 holes and 4000 holes, it was necessary to install an auxiliary winding roller in addition to the winding collet in order to wind the waist strand. According to the present invention, the blade formed over the entire circumference of the guide surface of the waist strand winding section can reliably cut even thick strands, so there is no need for an auxiliary winding roller.

Further, although the conventional type required a device for adjusting the speed difference between the two collets, the present invention does not require such an adjusting device.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of one embodiment of the waist strand winding part of the winding collet of the present invention, and Fig. 2 is a front view of the same, with a part of the front cut away and taken along the - line in Fig. 1. Shows the internal structure. FIG. 3 is a front view showing an overview of forming a strand package by a continuous winding device for glass fiber strands to which the present invention is applied; FIG. 4 is a side view of the same;
Figures 5 and 5b are schematic diagrams explaining the mode of strand transfer according to the present invention. Figure 5a shows a state in which the collet in the winding position is full before the start of strand transfer, and Figure 5b shows an empty collet. This shows the state in which the collet is placed in the winding position and begins to move. 5... Strand, 6, 6'... Winding tube, 7...
... Turret, 8, 8'... Winding collect, 9...
Waist strand winding section, 15... Circumferential groove, 1
6... Strand guide surface, 17... Bottom surface of circumferential groove, 18... Annular recess, 19... Blade.

Claims (1)

[Claims] 1. In a continuous winding device for glass fiber strands, in which at least two winding collets are mounted on a rotatably supported turret, a waist strand is attached to the circumferential surface of the waist strand winding portion at the tip of each winding collet. A circumferential groove for winding is provided, and the side wall of the circumferential groove on the collector side is a frusto-conical strand guide surface that is inclined toward the bottom surface of the circumferential groove and is close to the bottom surface of the circumferential groove. A glass fiber strand characterized in that the guide surface is cut in the axial direction of the collet at a portion to form an annular recess, and a blade forming an acute angle over the entire circumference is formed between the tip of the guide surface and the recess. Continuous winding device.