JPS59115219A - Method of packing coated electrode internally mounted box - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a method for packaging an inner box for coated arc welding rods, and in particular, in order to ensure orderly storage in the outer box, the heat-shrinkable film for packaging protrudes from the sides or ridges of the inner box. The present invention relates to a method that can correctly press a heated film to both sides without causing any damage.

The coated arc welding rod is wrapped in a heat-shrinkable packaging film made of ester, polypropylene, etc., as shown below, and then passed through a heat-shrinking treatment device such as a shrink tunnel furnace. The wrapping film is heat-shrinked to tightly wrap the body of the inner box, and to finish both sides, both edges of the film, which have been softened by heat treatment, are pressed onto both sides of the inner box with a pressure roller. Complete the interior by applying pressure and pressure using a similar method. After the inner boxes have been crimped, they are packed into outer boxes, such as cardboard boxes, several at a time, to facilitate transportation. However, in the conventional packaging of the above-mentioned coated arc welding rod inner box, the film overhangs on both sides of the inner box after the film has been crimped, resulting in poor shaping and problems when the inner box is assembled into the outer box. Sometimes it caused. That is, FIG. 1 is a schematic explanatory diagram illustrating a conventional packaging method, and FIG. 2 is a schematic explanatory diagram illustrating an inner box obtained by this packaging method. In FIG. 1, the dotted line indicates a coated arc welding rod. The heat-shrinkable packaging film 2 wrapped around the inner box 1 is heat-shrinked in a shrink tunnel furnace 6 shown in Figure 3, which will be described in detail later, so that it fits perfectly onto the body of the inner box 1. It is in a covered state. On the other hand, the packaging heat-shrinkable film 2 on both sides that should cover both sides of the inner box 1 is softened and fused by heat treatment in the shrink tunnel furnace 6, but it overhangs to both sides and its lower end is under its own weight. According to 2a,
It hangs down like 2b. Then, the fusion film 2 that protrudes into both sides is crimped to both side surfaces by a crimping roller to complete the packaging.
, 2b are crimped while hanging down, resulting in hanging overhangs 2c and 2d as shown in Figure 2.
In particular, the downwardly protruding portion of the inner box 1 is poorly disposed of, and must be cut off or lifted upward when it is assembled into an outer box, resulting in a drawback that the productivity of the packaging operation is significantly reduced.

The present invention solves the above-mentioned problems and properly processes the fused film hanging down on both side edges of the inner box up to the crimping stage to enable proper crimping, thereby preventing the sagging of the film. A packaging method for obtaining a covered arc welding rod inner box without overhang is provided.

The configuration and effects of the present invention will be specifically explained below based on the drawings showing the embodiments, but the embodiments below are only one specific example, and various changes may be made in keeping with the spirit of the preceding and following. All of these are included within the technical scope of the present invention.

Fig. 3 is a side view illustrating an apparatus suitable for implementing the method of the present invention, Fig. 4 is a plan view of the same, Fig. 5 is a front view of the same main part, and Fig. 6 is a front view of the inner box after crimping. Show the diagram.

The coated arc welding rod inner box 1 is placed on a conveyor 3 moving in the direction of the arrow and wrapped with a packaging film 2.
The film is subjected to heat shrinking treatment in a shrink tunnel 6, and the body side of the circular box is tightly covered by the shrinkage of the film. However, as shown in FIG. 1, the ears on both sides of the inner box 1 have not only overhangs but also sag 2a and 2b. Therefore, in the present invention, the conveyor 3
A detector 4, a hot air blowing pipe 5, a pressure bonding roller 7, etc. are provided on the left and right sides along the ridge, and the hanging portions 2a and 2b are automatically lifted and crimped on both sides along with the overhanging portions. ing. That is, the detector 4 is a detector using, for example, a phototube, and detects when the coated arc welding rod inner box 1 arrives from the shrink tunnel 6, and instructs when to start operating the hot air blowing pipe 5 and the pressure roller 7. It is structured like this. Therefore, if necessary, the timer a structure may be used, but the operation of the hot air blowing pipe 5 and the pressure roller 7 may be started at the same time as the detection without providing a time lag. The hot air blowing pipe 5 has a plurality of hot air blowing nozzles 8 that open upward, and the hot air sent from the hot air supply pipe 9 is directed upward from the hot air blowing nozzles 8 according to a command from the detector 4. It is configured to blow out.

Although cold air may be used for blowing, hot air was used in the examples as described above, since it is better to warm this area as much as possible rather than cooling it in order to effectively bond the fusion film. The pressure rollers 7 are rotatably configured to pinch the inner box 1 from the left and right sides, and to pinch the fusion films 2 on both sides that have been softened by heat treatment in the shrink tunnel 6, and are configured to be rotatable. Driving is started in response to a command from the detector 4 as shown in FIG. The spring body 11 (FIG. 4) is provided as a buffer when the inner box 1 moves on the conveyor 3 (when the inner box 1 moves out of position). When the inner box 1 in a hanging state as shown in 2b exits the shrink tunnel 6 and advances on the conveyor 3 and passes the detector 4, the detector 4 detects the arrival of the inner box 1 and blows out hot air. A command is given to the tube 5 and the pressure roller 7, and the hot air nozzle 8 starts jetting hot air upward, and the pressure roller 7 starts rotating in the direction of the arrow (FIG. 4). As a result, the drooping 2 at both ears of the inner box l reaches above the hot air blowing nozzle 8.
a and 2b, the inner box 1 receives the hot air jetted upward from the hot air blowing nozzle 8 as shown in FIG.
be lifted above the bottom of the In FIG. 5, the inner box 1 advances on the conveyor 3 in this state and enters between the pressing rollers 7 which are being driven and rotated, and is pressed by the rollers, so that the lifted hanging portion 2e
, 2f are crimped together with the other fusion films on both ears at approximately that position, and then proceed to the front of the conveyor 3 to complete the crimping. Therefore, the protrusion 2C92d to the bottom, which occurs in the conventional method, does not occur at all on both ears of the interior box 1 shown in FIG. 6, and an interior box with a beautiful appearance can be obtained.

In this embodiment, a hot air blowing pipe, a hot air blowing nozzle, etc. are used as a means for lifting the heated film hanging from both left and right ears of the inner box to the crimping position. It is also possible to use guides on both sides of 3, which are configured to lift the hanging film to the crimping position of the crimping roller. It is also possible to change the hole diameter of the hot air blowing nozzle, the number of blowing nozzles, and the hot air temperature depending on the size and shape of the inner box and the thermal properties of the film. Further, the crimping means may be changed to a device other than the crimping roller, and a crimping iron is an example thereof.

Since the present invention is constructed as described above, it is possible to eliminate the overhanging and sagging that occurred on the lower surface of both sides of the inner box of the covered arc welding rod, which was conventionally covered with a heat-shrinkable packaging film and subjected to heat-shrinking treatment. In addition to being able to obtain a beautiful interior box,
There were no problems at all when assembling the items into the outer box or transporting them.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram illustrating a conventional method, FIG. 2 is a schematic explanatory diagram illustrating a plastic box packed by a conventional packaging method, and FIG.
The drawings are a side view illustrating an apparatus suitable for carrying out the method of the present invention, FIG. 4 is a plan view of the same, FIG.
The figure shows a front view of the inner box after crimping. Engineering: Covered arc welding rod inner box, 2; Heat-shrinkable film for packaging, 3; Conveyor, 4R detector, 5; Hot air blowing pipe, 6
Shrink tunnel furnace, 7; Pressing roller, 8; Hot air blowing nozzle, 9: Hot air supply pipe, 10: Shaft, 11F spring body, 2a, 2b, 2e. 2f; hanging down, 2c + 2d; overhanging. Applicant Kobe Steel, Ltd.

Claims (1)

[Claims] A heat-shrinkable packaging film is wrapped around the inner box of the covered arc welding rod and heat-shrinked, and both sides of the inner box are pressed together to form a heat-shrinkable film. When packaging, a detection means for detecting the arrival of the inner box and a film that is heated and hung down from both left and right ears of the inner box are crimped onto the conveying means on which the inner box has been placed immediately after heat-shrinking treatment. A means for lifting the film to a position and a crimping means for crimping the lifted film to both sides of the inner box are provided, and in conjunction with the detection means, the film heated and hanging down from both left and right ears of the inner box is moved to the crimping position. A method for packaging an inner box for covered arc welding rods, which is characterized by crimping after lifting.