JPH0413201B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] When a hexahedral package is molded from a thermoplastic strip sheet or a thermoplastic-coated strip sheet, the present invention is capable of forming edges on both sides of the hexahedron from the sides or at the top and bottom of the hexahedron. relates to an ear heating device for welding to a bottom surface.

[Conventional technology]

As a device that blows and heats hot air to the ears of a package for fusing, firstly, a heating element is installed parallel to the transport direction of the package, and the heating element is placed in the ear of the package in line with the hot air outlet of the heating element. Some devices stop moving, heat the ears, then transfer the package again and move on to the clamping process.

Secondly, there is a method in which the package is moved continuously rather than intermittently, and the package is passed through a fixed heating body to heat the entire package.

Furthermore, as a third method, heating elements for heating the ears of individual packages are endlessly provided on a disk or the like at regular intervals, and each heating element is moved as the package moves. Some types require heating for a predetermined period of time.

[Problem that the invention seeks to solve]

Among the above heating devices, the first type cannot be used for devices that continuously form a strip of sheet and fill it with contents because the package moves intermittently, and the first type heats the package intermittently. Therefore, it has the disadvantage that it is less efficient than one that is done continuously.

In the second method, the package can be heated continuously without any strain, but since the heating element is fixed, unnecessary parts are heated, which may deform the package and adversely affect the contents.

Furthermore, although the third method can efficiently heat the ears of the package cages that are continuously transferred, it requires a large number of heating bodies as they move to follow the package cages, and each heating body requires hot air blowing and stopping operations. are required individually, making the device unavoidably complicated.

[Means for solving problems]

In view of the shortcomings of conventional devices, the present invention aims to heat the ears of continuously transferred packages efficiently and with a simple configuration.The device holds packages at regular intervals and rotates at a constant speed. It consists of a heating body that reciprocates within a certain range while keeping a constant distance from the moving trajectory of the transporting body and package cages. It moves while maintaining a fixed position with the covered package, and returns quickly on the return trip, and the reciprocating time is set to the time it takes for the package to move between the same number of packages as the number of packages covered by the heating element. It is something to do.

[Effect]

The transfer body holds the roughly hexahedral shaped packages that are sent in sequence at regular intervals and rotates and transfers them at a constant speed. The body heats the ears of the package.

Since the heating body is provided with heat blowing holes that can heat each ear of a plurality of packages at the same time, each ear can be heated accurately.

Since the heating body moves while covering the package while maintaining a position where it can heat the ears of the package, the necessary amount of heating can be applied to the ears.

In addition, the heating element reciprocates within a certain range, and on the outward journey it heats and moves while maintaining a fixed position with the covered package, and on the return journey it returns quickly, and the heating element covers the package for one reciprocating time. The reason why the package moving time is set to the same number of hours as the number of packages is that it moves while heating multiple packages being transferred, and then quickly returns to its original position after heating to move on to the next unheated package after heating. The heating element is coated with the package and rotates again together with the package, and by repeating the reciprocating movement of the heating element, the ears of the package being transferred can be successively heated.

The number of packages that the heating element heats at one time and the reciprocating range are appropriately determined by the rotational speed of the transfer element, the heating power of the heating element, and the amount of heating for welding the edges.

〔Example〕

FIG. 1 shows an embodiment of the apparatus of the present invention. Reference numeral 1 denotes a transfer body which rotates at a constant speed and sequentially holds and transfers packages 3 sent from a shaping device 2.

The package 3 is filled with youth etc. and is shaped into an approximately hexahedron.
4, 4 are extending (Fig. 2).

The transport body 1 is a disc that rotates while gripping the package 3 by appropriate means, and the package 3 moves on the same circumference of the transport body 1.

Reference numeral 5 denotes a heating element, which has a heating means such as a nichrome wire 6 built therein, and jets hot air from heat outlet ports 7, 7, . . . . The heat outlet ports 7, 7... are provided corresponding to the positions of the respective ears 4, 4... when the package 3 is being transferred. It is supported by a swinging arm 9 whose base is loosely attached coaxially with the rotating shaft 8 of the transfer body 1 so as to rotate on the circumference of the long diameter.

The swinging arm 9 is provided with a drive pin 10, and the drive pin 10 is connected to a cam 11, and as the cam 11 rotates, the drive pin 10 reciprocates up and down, so the swinging arm 9 also moves up and down. , since the base is pivoted, the rotational movement occurs, and therefore the heating element 5 also rotates, and the transfer element 1
It moves back and forth within a certain range.

The heating element 5 is sized to be able to heat four packages 3 at the same time, and the reciprocating range of the heating element 5 is the range of three packages, and the rotation of the packages 3 in the same direction is covered by the 4 packages. The eccentric shaft and rotational speed of the cam are set so that the cam can maintain a fixed position with each package 3, and the return time in the opposite direction is the same as the travel time for one package 3.

In addition, in the embodiment, the package covering of the heating element 5 is 4.
For each individual package, the forward trip takes the rotation time of three packages along with the covering package, and the return trip takes the rotation time of one package as a quick return. is not limited.

〔Effect of the invention〕

In the present invention, the transfer body 1 is able to continuously move the package 3 at a constant speed by the reciprocating motion of the heating body 5, so that the heating process of the ear part 4 of the package 3 can be carried out efficiently, and the process of heating the package 3 from the roll paper can be carried out efficiently. It is fully applicable to an apparatus that continuously performs molding and filling.

Furthermore, since the heating body 5 is reciprocated during continuous heating, the ears can be heated without installing a large-scale heating means, and the heating source can be made smaller and more efficient.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
3 is a perspective view of the package before ear treatment, and FIG. 3 is a perspective view of the package after ear treatment. Symbols: 1 is a transfer body, 3 is a package, 4 is an ear part, 5 is a heating body, 7 is a heat ejection port, 9 is a rocking arm, 1
0 is the drive pin, 11 is the cam.

Claims (1)

[Claims] 1 Consists of a transfer body that holds packages at regular intervals and rotates them at a constant speed, and a heating body that reciprocates within a certain range while maintaining a constant interval from the trajectory of the package movement,
The heating body is equipped with a heat outlet that heats each ear of a plurality of package cages, and on the outward journey, it moves while maintaining the fixed position with the covered package cage, and on the return journey, it returns quickly. 1. An ear heating device for molding a package, characterized in that the time is set to the time required for the package to move between the same number of packages as the number of packages covered by the heating body.