JP2874652B2 - Drying device for joints of cylindrical body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method for joining a cylindrical body such as a traverse bar to which a traverse guide for traversing a yarn being wound is attached in a high-speed spinning apparatus in the axial direction. The present invention relates to an apparatus for drying an adhesive applied to a part.

[0002]

2. Description of the Related Art Since a traverse bar of a high-speed spinning device reciprocates at a very high speed (400 double strokes per minute), it is necessary to reduce an inertia force. For this purpose, a carbon fiber pipe is used. And light weight. Since the traverse bar extends over the entire weight, it is manufactured by joining a plurality of carbon pipes in the longitudinal direction. As shown in FIG. 2, the carbon pipes P1 and P2 are joined by inserting a joint pipe P0 having a diameter slightly smaller than their inner diameters into one another. The adhesive is applied to the inner peripheral surfaces of the carbon pipes P1 and P2 and the outer peripheral surface of the joint pipe P0.

[0003]

The drying of the adhesive in the manufacture of the above traverse bar is usually carried out by leaving it at room temperature for 24 hours. May be dried using. However, this has uneven and unreliable heating.

[0004] It is an object of the present invention to provide a drying apparatus capable of drying a bonded joint portion of a cylindrical body in a short time.

[0005]

According to the present invention, there is provided a drying apparatus for a bonded bonding portion in a cylindrical body, which comprises a pair of a pair of cylinder-to-be-sealed cylinders having a built-in heater, which can be opened and closed and can maintain a closed state. A groove having a semicircular cross-section is formed on the closed facing surface of each of the clamped bodies to be joined , and the center of the groove is deeper than the other parts.
That's bad .

[0006]

[0007]

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 3, an embodiment of an apparatus for drying a bonded joint in a tubular body according to the present invention will be described.

As shown in FIG. 1, this drying apparatus is comprised of two joined cylinder holding bodies 1 having exactly the same structure, which are hingedly openably and closably connected. Grooves 2a each having a semicircular cross section are formed on the opposing surfaces of the joined cylinder holding bodies 1 so that the closed cylindrical bodies P1 and P2, such as carbon pipes, fit tightly when closed. .

As shown in FIG. 3, each of the cylinder holding bodies 1 to be joined is, in order from the front surface side, a heating block 2 made of a good heat conductor such as aluminum having a groove 2a having a semicircular cross section as described above, A sheet-shaped heater 3, also a commercially available thermostat 4, is set in an aluminum case 6 via a heat insulating material 5.

The central portion 2a 'of the groove 2a of the heating block 2
Is a little deeper than the rest. This part 2a '
Is to prevent the adhesive from adhering to the heating block 2 even if the adhesive protrudes from the butted portions of the joined cylinders P1 and P2. If the protruding adhesive adheres to the heating block 2, it hardens as it is and does not separate.

An aluminum cover 7 is fixed by screws 8 around the heating block 2 on the surface of each to-be-joined cylinder holding body 1.
A heat insulating material 5 is interposed also in the gap between the cylinder holding members 1 so that the joined cylinder holding bodies 1 can be handled by hand even during heating.

As shown in FIG. 1, a lead wire 9 is passed between the joined cylinder holding bodies 1, 1, and one of the joined cylinder holding bodies 1 is connected via a lead wire 10. A simple control box 11 with a built-in timer that can set the drying temperature and drying time is connected. The control box 11 includes a dial 11a for setting a drying temperature and a dial 11b for setting a drying time. By operating these dials, the optimum conditions such as the drying temperature, the drying time, and the strength of the adhesive after drying are satisfied. . In addition, each of the cylinder holding bodies 1, 1 to be joined is provided with latches 12, 13 for maintaining the state when they are closed to each other.

The adhesive used for drying using this drying apparatus is not a quick-drying adhesive conventionally used, but a standard two-part thermosetting adhesive. The two liquids of the adhesive need to be mixed well before use. According to experiments conducted under various conditions, the temperature and time suitable for drying the adhesive efficiently and obtaining high strength are preferably about 80 ° C. for about 10 minutes.
At this temperature, the case 6 of the to-be-joined cylinder holding body 1 subsides to a temperature that can be held by bare hands, and can be continuously used in an energized state. In addition, the strength of the adhesive after drying can be maximized (about twice that of a conventional adhesive that is dried all day and night using a quick-drying thermosetting adhesive).

The cylinders P1 and P2 to be joined are generally prepared in a state where the joining cylinder P0 has been inserted and adhered to one of the cylinders P1. At the time of use, the other cylindrical body P2 is fitted to and bonded to the joining cylindrical body P0. At that time, as shown in FIG. 2, the outer peripheral surface of the joining cylinder P0 is thinly coated with a well-mixed thermosetting adhesive 14, and the inner peripheral surface of the cylinder P2 is also slightly painted. Then, the tubular body P2 is fitted to the joining tubular body P0 while being twisted. When connecting a plurality of cylinders, the same operation is performed for all other necessary joints.

Next, a description will be given of a method of using the drying apparatus of the present invention, taking as an example a case where the drying apparatus is used for joining a carbon pipe traverse bar in a high speed spinning apparatus.

First, the drying device is energized to heat the sheet heater 3 to a predetermined temperature (80 ° C.) in advance. The time required for this temperature rise is about 2 minutes. Next, the hollow set of the take-up roller 15 for three weights near the place where bonding is required is loosened so that the drying device can be set on the connected carbon pipes (P1, P2 #) serving as traverse bars. Move in the axial direction, as indicated by arrows. Then, the carbon pipes P1 and P2 are aligned such that the abutting portion of the carbon pipes P1 and P2 comes to the central portion 2a 'of the groove 2a of the heating block 2 of the joined cylinder holding body 1, and the joined cylinder holding bodies 1
Close and maintain for about 10 minutes. In this way, the entire periphery of the joint is heated, so that the joint is uniformly dried.

The carbon pipe thus bonded was dried and allowed to stand at room temperature for 3 minutes after drying, and a tensile strength test was performed. As a result, the carbon pipe itself held by the chuck of the tensile strength tester was broken, and the bonded portion was broken. Was not done.

[0019]

Since the present invention is configured as described above, it has the following effects.

That is, despite being simple and lightweight, it is possible to uniformly dry the joint bonding portion of the tubular body in a short time. In addition, the strength of the joint can be much higher than the conventional one. In addition,
Since the center of the groove of the holding body is slightly deeper than the other parts,
Even if the adhesive protrudes from the butted part of the joining cylinder,
It does not adhere to the sandwiching body,
There is no possibility that the cylinder is not separated from the clamped body.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a use state of a traverse bar of a high-speed spinning device of a drying device of the present invention.

FIG. 2 is a perspective view illustrating a procedure for applying an adhesive to a joint of a tubular body.

FIG. 3 is a view showing one part of the drying device of the present invention, wherein (1) is a plan view and (2) is a cross-sectional view taken along AA in (1).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining cylinder holding body 2 Heating block 2a Groove 2a 'Central part of groove 3 Heater (sheet-like heater) 4 Thermostat 5 Heat insulating material 6 Case

Claims (1)

(57) [Claims] 1. A set of two cylinder-to-be-joined cylinders having a built-in heater capable of being opened and closed and maintained in a closed state,
A drying device for joining and bonding a cylindrical body in which a groove having a semicircular cross-section is formed in a closed facing surface of each of the clamped bodies to be bonded , and the center of the groove is deeper than other portions .