JP2506836Y2 - Strand joining device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strand bundle joining device.

[0002]

2. Description of the Related Art A glass fiber bundle (strand) obtained by adding and focusing a sizing agent to a large number of glass fibers pulled out from a bushing is a chopped strand (CS), chopped strand mat (CM), preform, spray-up. , Is widely used as a reinforcing fiber for FRP. The strand manufactured in the strand manufacturing step (yarn collecting step) may be directly sent to the next step for use, but it is usually sent to a cutting device or the like after being roving in the following step. In the yarn collecting step, a pair of rotating spiral wires is used to traverse the strands, and a winding cake is formed on a paper tube fitted on a mandrel rotating at high speed. After drying the cake in a drying oven (CDO), the paper tube is removed and the strands are drawn from the cake.
At this time, a large number of cakes are placed on a loading platform, the strands are simultaneously drawn from each cake, and a large number of these strands are aligned to form a strand bundle, and the strand bundle is traversed in a cylindrical shape and roving. To do.

A large number of rovings are stacked on a loading platform to form a package. The strand bundle is pulled out from the roving and sent to a cutting device or the like. In order to continuously perform the cutting operation, it is necessary to previously connect one end (end) of the strand bundle forming the roving and one end (start end) of the strand bundle forming the roving to be used next. . As such a connecting method (joining method), for example, Japanese Patent Publication No.
The methods of 1494 and JP-A-2-68322 are known.

[0004]

[Problems to be solved by the device] Japanese Patent Publication No. Sho 49-4149
The method of No. 4 (first method) has the following problems. (1) This method is complicated, requires manual work by a skilled worker, and is difficult to automate. (2) If slack occurs at the joint, the knot may come off and the strand bundle may be unwound. (3) When the strand bundle is cut and used, the knot may not be filled and decomposed. The method (second method) of JP-A-2-68322 has the following problems. (1) The knot may be unraveled, and this tendency tends to become larger as the diameter of the glass fiber constituting the strand becomes larger and as the amount of the sizing agent added at the time of yarn collecting becomes larger. (2) The tensile strength of the joint is reduced. This tendency becomes larger as the Tex (gr number per 100 m) of the strand bundle becomes larger. The present invention solves the above-mentioned problems of the prior art, does not require skilled manual work, has a large tensile strength, does not open the knot (joint), and sufficiently unbinds the joint. An object of the present invention is to provide a joining device for joining strand bundles.

[0005]

In the present invention, in order to achieve the above-mentioned object, a plurality of elongated passages communicating with a compressed air introducing pipe are arranged in parallel, and the upper portions of the passages are longitudinally arranged. A strand joining apparatus is used in which a slit for introducing a bundle of strands that has been opened is provided, and a divergent strand bundle introduction guide is connected to the upper end of the slit.

Next, the device of the present invention and the method of using the device will be described in detail with reference to FIGS. 1, 2, 3, 4, 5, 6, 7 and 8. The ends of the two strand bundles A and B are divided into a plurality of groups A ₁ , A ₂ , ..., B ₁ , B _{2 ,} . (FIG. 4 shows an example divided into two groups.) A ₁ and B ₁ , A ₂ and B ₂ ... Are aligned to form overlapping portions X ₁ and X ₂ . The number of divided strand bundles is not particularly limited, but the weight per 1,000 m of each group (g
It is preferable to divide so that r) is 4,000 or less, preferably 1,200 or less. The larger the number of divisions,
Although the tensile strength of the joint becomes large, the number of steps increases and the effect does not increase so much. The length of the overlapping part is 1
It is suitable to be -15 cm, preferably 2-5 cm.

The overlapping portions X ₁ , X ₂ , ... Are respectively introduced into the tubular passages 1 arranged in parallel, in which case the joining device 1 described below is used. The joining device 1 has a plurality of tubular passages 2 arranged in parallel, and a slit 3 is formed in the upper portion of the tubular passage 2 in the longitudinal direction. The slit 3 has a pair of divergent ends. An introduction guide 5 having a guide surface 4 is provided. The guide surface 4 intersects with the adjacent guide surface 4 to form a linear top portion 6 and has a saw-toothed blade-shaped cross section as a whole. When the ends of the strand bundles A and B are overlapped and pressed against the top 6 of the introduction guide 5,
The strand bundles A and B are divided into the plurality of groups described above, and are introduced into the tubular passage 2 through the slits 3 along the guide surface 4. A pipe 7 is connected to the joining device 1, and the compressed air supplied to the pipe 7 is jetted into the passage 2 through an air supply groove 8 having a circular cross section and a branch groove 9, and the overlapping portion X ₁ , Twist is applied to each X ₂ to form the joint portion 10, and the strand bundle is joined. At this time, if the ends of the overlapped portions are restrained by holding them with a jig or by hand, twist is not given to the central portion, and twists in different right and left directions (for example, S twist on the left, A twisted portion is formed in which the right is Z twisted), and a twisted portion having such a shape is most preferable.
When only one end of the overlapping portion is constrained, a non-twisted portion does not occur, and a twisted portion having only S twist or Z twist is formed.

The overlapping portions thus formed with the twisted portions are aligned to form a roving joint portion 10, and a cylindrically wound roving 11 is joined at the joint portion.
They are stacked on the gantry 12 to form a roving connection body. When the strand bundle is pulled out from the roving, the strand bundle constituting each roving is joined as described above, and it can be pulled out continuously, and the tensile strength of the joined portion is large,
Also, the joint will not be unraveled. In addition, it is particularly preferable that the twists of the adjacent joints are determined in the same direction. The twisting direction obtained by using the above-mentioned joining device is determined by the relative position and the crossing angle of the branch groove 9 and the passage 2 which are opened in the passage 2, and by making these constants, the twisting in the same direction is given to each group. be able to.

[0009]

When the ends of the strands A and B formed by aligning a plurality of strands are joined, each strand bundle A, B
End strand bundle introduction respective plurality of groups A ₁ is pressed against the _{guide, A 2, ..., B 1} , B 2 ... divided into a, A ₁ and B
₁ , A ₂ and B ₂ ... are overlapped and aligned, and aligned bundles X ₁ , X
₂ , and each alignment bundle is introduced into the tubular passages through the introduction guide and slits, and compressed air is supplied to each tubular passage, thereby twisting the alignment portions to join the overlapping portions. By doing so, the operation of joining the ends of the strand bundle can be performed easily and reliably, and the twisting can be prevented from returning.

[0010]

Example 1 Roving (made by Asahi Fiber Glass Co., Ltd.) used for SMC (weight: 16 kg, 1,000)
48 gr units per m (4,800) were piled up. At this time, the starting end and the ending end of each roving are pulled out, overlapped with a length of 30 mm, and pressed against the top of the introduction guide to obtain five groups (A ₁ , A ₂ , ... A ₅ ), (B ₁ B ₂
… B ₅ ) divided into each and inserted into the tubular passage, 6 kg /
A compressed air of cm ² G was jetted into the passage and twisted together.
The tensile strength of this joint portion was 51 kg, the joint portion could be continuously pulled out and cut without unraveling, and the debinding of the joint portion was also complete.

[0011]

[Example 2] 1,000 m instead of the roving of Example 1
4 ends of 2,400 gr Lobink per unit weight
It was divided and the same results as in Example 1 were obtained. The tensile strength of the joint was 30 kg.

[0012]

[Effect of the Invention] The strand bundle can be joined without requiring skilled work, the tensile strength is large, it does not unwind, and the unbundling of the joined portion is sufficient.

[0013]

[Brief description of drawings]

FIG. 1 is a perspective view of a joining device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is a model diagram for explaining how to use the device of the present invention.

FIG. 5 is a perspective view illustrating a method of using the device of the present invention.

FIG. 6 is a model diagram for explaining a connecting portion of a strand bundle.

FIG. 7 is a perspective view for explaining a connected state of rovings.

FIG. 8 is a perspective view for explaining a connected state of rovings.

[Explanation of symbols]

A Strand Bundle B Strand Bundle A ₁ Group A ₂ Group B ₁ Group B ₂ Group X ₁ Alignment Part X ₂ Alignment Part 1 Joining Device 2 Tubular Passage 3 Slit 4 Guide Surface 5 Introduction Guide 6 Top 7 Pipe 8 Air Supply Groove 9 Branch groove 10 Joint 11 Roving 12 Stand

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of elongated passages communicating with a compressed air introducing pipe are arranged in parallel, a slit for introducing a strand bundle opened in the longitudinal direction is provided at an upper portion of each passage, and an upper end of the slit is expanded. A strand joining device, which is connected with a ribbon-shaped strand bundle introduction guide.