KR101090492B1 - Knife assembly for packing machine using packing film - Google Patents

Abstract

The present invention relates to a knife assembly for fusion cutting a packaging film when packaging a product using the packaging film.
The present invention by applying a non-heating element as a material of the knife fixing terminal for fixing the knife and wire connection by implementing a new type of knife fixing method that has improved the structure to a variable type that can accommodate the change in length according to the expansion of the knife In addition, the safety problems caused by electricity can be prevented in advance, and the knife life can be greatly improved by preventing the knife from being broken, thereby greatly improving the knife performance and durability. By improving the round shape to a gentle curved shape, the product packaging device using a packaging film that can eliminate the problem of knife breakage by preventing heat concentration and improve workability when replacing a knife. To provide a knife assembly.

Description

Knife assembly for packing machine using packing film}

The present invention relates to a knife assembly for fusion cutting a packaging film when packaging a product using the packaging film.

In general, a method of packaging a product includes a method using a box, a method using a packaging film made of vinyl, and the like.

In this packaging method, in particular, a packaging method using a vinyl film, after receiving the product in a two-layer packaging film, fusion cutting the opening of the packaging film around the product with a "b" shaped knife (heating wire) assembly To package the product in a sealed state in the packaging film.

Then, the packaging is completed by applying heat or vacuum suction to the product transferred to the heating chamber by the conveyor while being packed in the packaging film so that the packaging film is in close contact with the product.

The device for sealing and packaging the product by using such a packaging film is a means for continuously supplying the packaging film folded in the width direction in the longitudinal direction, the perforation of the packaging film by the needle means for the discharge of the internal air during the sealing packaging of the product Means, the means for reversing the packaging film that is folded in half into an up and down development state, a means for fusion cutting and wrapping the packaging film after receiving the product in the packaging film, a means for winding and collecting the remaining piece packaging film after product packaging; It consists of a form including a separate means for conveying conveying means that is arranged in conjunction with the progress of the packaging film.

Accordingly, the packaging film in the form of a roll is supplied from the packaging film supply means, the product is accommodated in the packaging film in the region where the packaging operation is performed, and means for fusion cutting the packaging film in the state where the product is received, that is, the knife assembly. The packaging film is fused and cut, and finally the packaging for the product is completed through vacuum adsorption.

Here, the knife assembly is provided in a frame of a rectangular frame that is vertically rotated by the actuator means, the frame is provided with a cartridge heater for heating the knife assembly.

The knife assembly is composed of a shape assembled into a "b" shape, and consists of a knife block corresponding to the main body and a knife that is coupled side by side along the lower end of the knife block substantially fusion cutting the packaging film.

Accordingly, the knife block is heated by the cartridge heater, and the cutting operation using heat fusion can be performed while being heated to the knife by heat conduction.

However, the conventional knife assembly has the following disadvantages.

First, there are no countermeasures against the insulation of the knife block fixing the knife, there is a disadvantage that the safety accident often occurs due to electricity.

Second, there is a disadvantage in that the breaking phenomenon frequently occurs due to the knife expansion by adopting a method of simply fastening both ends when fixing the knife.

Third, since the corner portion of the knife is sharply bent shape is likely to be broken by the heat concentration phenomenon, the work is difficult and inconvenient when replacing the knife.

Accordingly, the present invention has been made in view of the above, and the variable structure that can accommodate the change in length according to the knife expansion while applying the non-heating element as a material of the knife fixing terminal for fixing the knife and wires Implementing a new type of knife fixing method improves the performance and durability of the knife by preventing problems of safety accidents caused by electricity and prolonging knife life by preventing the knife from breaking. It is an object of the present invention to provide a knife assembly of a product packaging apparatus using a packaging film that can be greatly increased.

In addition, another object of the present invention is to improve the shape of the corner portion of the knife to a smooth curved shape with a large round, thereby preventing the problem of breaking the knife by preventing the heat concentration phenomenon, and at the time of knife replacement It is to provide a knife assembly of a product packaging device using a packaging film that can improve the workability.

In order to achieve the above object, the knife assembly provided in the present invention includes a knife block having a built-in "a" shape while the cartridge heater is built in for heating the knife, and are coupled side by side along the lower end of the knife block. A knife for fusion cutting the film, and a knife fixing terminal coupled to both ends of the knife block to fix the knife, in particular, the knife fixing terminal is made of a non-conductive material for preventing electric conduction and is fixed to the knife block side. The main block is coupled to the main block by the lower end is rotatable, and the upper end includes a sub block for fastening and fixing the end of the knife and rotating according to the length change when the knife is inflated to accommodate the knife length change at this time. Inconvenient form of knife fixing Improved, by avoiding the problems caused by the complementary electrical and safety accidents, also significantly, as well as to extend the life of the knife, and has features that can further increase the life of the equipment.

Here, the corner block of the main block is mounted to the corner block having a corner groove portion formed in a smooth curved shape while communicating with the knife mounting groove formed in the block, to maintain the knife corner portion in a rounded shape, Therefore, it is desirable to prevent the problem of breaking the knife and discomfort when replacing the knife by preventing the heat concentration phenomenon in the corner portion.

The knife assembly of the product packaging device using the packaging film according to the present invention provides the following advantages.

First, since the main block material of the knife fixing terminal is made of a non-heating element, it is possible to prevent safety accidents caused by electricity in advance, and eventually increase the life of the equipment.

Second, the sub block holding the knife at the knife fixing terminal is assembled into a rotatable variable structure, and by using the elasticity of the spring, it is possible to actively respond to the change in the length when the knife is inflated, thereby preventing the knife from breaking. It can greatly extend knife life and durability, and also improve knife functionality.

Third, when the knife is inflated, the sub-block does not horizontally move but rotates, thereby eliminating the inconvenience of connecting the wires.

Fourth, since the corner portion of the knife is formed in a gentle curved shape, that is, a soft "U" shape with a large round, the heat concentration phenomenon of the corner portion can be eliminated, and eventually the disconnection of the knife can be greatly reduced. In addition, it can increase the efficiency of knife replacement work, such as to reduce the inconvenience of replacing the knife.

1 is a perspective view showing a knife assembly of a product packaging apparatus using a packaging film according to an embodiment of the present invention
Figure 2 is a perspective view showing a knife fixing terminal in the knife assembly of the product packaging device using a packaging film according to an embodiment of the present invention
3A and 3B are perspective views illustrating an operation state of a knife fixing terminal in a knife assembly of a product packaging apparatus using a packaging film according to an embodiment of the present invention.
Figure 4 is a perspective view showing a knife corner in the knife assembly of the product packaging apparatus using a packaging film according to an embodiment of the present invention
Figure 5 is a perspective view showing the installation state of the knife assembly of the product packaging device using a packaging film according to an embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a knife assembly of a product packaging apparatus using a packaging film according to an embodiment of the present invention.

As shown in FIG. 1, the knife assembly includes a long bar-shaped knife block 10 and a knife 11 for fusion cutting of a packaging film, and the knife block 10 includes a cartridge heater for heating a knife. Heat transfer means (not shown), such as the built-in.

The knife 11 is formed in the form of a thin plate, and is installed along the knife mounting groove 17 formed in the knife block 10.

Here, in the case where the thin plate is attached to the knife block 10 and used, the heat transfer from the block is excellent and rapid heating is possible, and finally, the knife 11 can be quickly heated and used.

The knife block 10 is a portion for holding the knife 11, the lower end portion is provided with a knife mounting groove 17 having a predetermined width to accommodate the knife 11 in the form of a strip, along the longitudinal direction of the block, A cartridge heater (not shown) is mounted along the inner longitudinal direction of the block body.

The knife 11 is inserted into the knife mounting groove 17 of the knife block 10 in a state where the upper and lower widths are approximately 2/3, and both ends thereof are fixed by the knife fixing terminal 12 described later. It is installed in the form.

Normally, the knife block 10 is used in the form of the letter "a", and thus the knife block 10 provided in the present invention may be manufactured and used in the shape of the letter "a".

To this end, the two knife blocks 10 are assembled in the form of "a", and thus the assembled "a" shape of the knife block 10 has a "a" shape of continuous shape as one unit without a broken portion. The knife 11 is installed.

That is, a band having a predetermined thickness may be bent in a “a” shape, and a single “a” shaped band is formed in the knife block 10 that is also assembled in a “a” shape. have.

And, both ends of the knife block 10, which is assembled in the form of "a" is mounted to the knife fixing terminal 12 for holding both ends of the knife 11 in a fastening structure, the corner portion of the knife knife section The corner block 19 that can be supported in a gentle curved form is mounted, and the knife fixing terminal 12 and the corner block 19 at this time will be described in detail later.

Figure 2 is a perspective view showing a knife fixing terminal in the knife assembly of the product packaging apparatus using a packaging film according to an embodiment of the present invention.

As shown in FIG. 2, the knife fixing terminal 12 is a means for holding both ends of the knife 11, and is composed of a main block 13 and a sub block 15, and in particular, can prevent electrical conduction. And a structure capable of flexibly accommodating the length change due to thermal expansion of the knife 11.

To this end, the main block 13 is made of a non-heat-resistant material of a synthetic resin system, such as plastic, is fixed to the end of the knife block 10 in a fastening structure, the upper end portion of the knife insertion groove which can pass the knife 11 21 is formed.

As the main block 13 is made of a non-heating element, the problem of sparking caused by electrical interference can be completely solved, and the life of the equipment can be greatly extended.

And, the main block 13 is provided with a spring mounting groove (20a) on the inner side, at this time one end of the spring 16 to be described later is inserted into the spring mounting groove (20a) can be supported.

The sub block 15 is a portion for substantially fixing the knife 11, and is installed in a structure rotatable by the pin 14 at the bottom in a state of being vertically combined with the main block 13 side by side.

That is, the sub block 15 is rotatable around the pin fastening portion of the lower end.

In addition, a knife fastening groove 23 is formed at an upper end of the sub block 15, and the screw is fastened in a horizontal direction in a state where the knife 11 is positioned in the knife fastening groove 23. 11 may be fixed to the upper end of the sub block 15 by a fastening structure.

In addition, the sub block 15 is provided with a spring mounting groove 20b on the inner side, and one end of the spring 16 can be inserted and supported therein.

In particular, the sub block 15 is rotatable in a pin fastening structure on the main block 13, the rotation operation at this time can be made elastically by the spring (16).

To this end, between the main block 13 and the sub block 15, a spring 16 which is supported at both ends in each of the spring mounting groove (20a, 20b) is installed, thereby the sub block 15 is a spring 16 It is possible to rotate while receiving the force, and eventually the change in the length of the knife 11 can be flexibly accommodated by the movement characteristic of the sub-block 15.

That is, by holding the spring 16 of the size change that the knife 11 expands and expands due to heat, it is possible to prevent the knife 11 from breaking.

For example, as shown in Figs. 3A and 3B, since there is no change in the length of the knife 11 at ordinary times, the sub block 15 remains in a state of being attached to the main block 13 side. When the spring 16 is in a contracted state (FIG. 3A), and the length is increased while the knife 11 is inflated due to the heat during the fusion cutting, the sub block 15 is connected to the lower pin 14. Since it is rotated on the axis and flipped back, it is possible to actively cope with the change in the knife length, and eventually prevent the knife 11 from breaking.

Figure 4 is a perspective view showing a knife corner in the knife assembly of the product packaging apparatus using a packaging film according to an embodiment of the present invention.

As shown in FIG. 4, the knife 11 for fusion cutting of the packaging film is formed in a single shape without being cut as a whole, and is formed in an “a” shape, and the corner portion of the knife 11 has a gentle curve. The shape, that is, the round shape of the "U" shape, in particular, the round shape is enlarged to approximately 1/4 arc shape, so that when the edge portion of the packaging film is fusion cut, a smooth cut shape can be obtained.

To this end, the corner block 19 of the knife block 10 is mounted in a fastening structure, and the corner block 19 at this time is provided with a corner groove portion 18 having a smooth curved shape.

In addition, the corner groove portion 18 is in communication with the knife mounting groove 17 formed in the main block 13 and continues to be intact, whereby the knife 11 is inserted into the knife mounting groove 17. It can hold the corners while keeping them rounded.

By thus treating the bending portion of the knife 11 in a rounded shape with a gentle curve, it is possible to prepare for heat curing at the corner portion and to relieve stress at the corner portion.

In particular, by giving the knife 11 at the corner portion a “U” shaped round, it is possible to reduce the probability of breaking the knife frequently occurring, and to add beauty to the conventional methods in knife replacement. While the sharp bending with little is given, the corner portion of the present invention gives a smooth "U" shaped round, thereby reducing the inconvenience of knife change.

Then, by increasing the round shape of the knife-shaped "U" shape of the corner portion, the heat concentration phenomenon of the corner portion can be eliminated, and the knife cutting can be greatly reduced.

5 is a perspective view showing the installation state of the knife assembly of the product packaging apparatus using a packaging film according to an embodiment of the present invention.

As shown in FIG. 5, the knife assembly 140 is mounted to the bottom of the frame 100 installed at one side of the facility by a plurality of brackets 110, and the frame 100 at this time. ) Is installed in a rotatable structure on the installation side support 130 by using the rotating shaft 120, while pressing the knife assembly 140 to the packaging film side while operating in a way that is rotated up and down by a cylinder (not shown). It will give or raise up.

Therefore, looking at the state of use of the knife assembly is configured as follows.

The packaging film in the form of a roll is supplied from the packaging film supply means, and the product is accommodated in the packaging film in a region where the packaging operation is performed. The packaging film is fused and cut by vertical operation.

That is, the packaging film is fused and cut by the knife 11 in the knife assembly 140, and finally, the packaging for the product is completed through vacuum suction operation.

Here, in the case of the knife 11, thermal expansion occurs due to the continuous heating, the length change of the knife 11 due to the thermal expansion at this time is fixed to the knife fixed terminal 12 at both ends of the knife block 10 Since it is accommodated by the movement of the sub-block 15 of), it is possible to eliminate the fear that the knife 11 is broken, and thus it is possible to efficiently perform the fusion cutting operation without problems such as the shutdown of the equipment. .

In addition, since the packaging film is cut by the knife 11, which is formed in one piece and has a smooth curved corner portion, it is possible to obtain a clean fusion cut surface for the corner portion, as well as a round curved round shape. Since the heat concentration phenomenon of the knife corner part can also be eliminated by the shape, the problem of disconnection of a knife, especially the disconnection of a corner part, can be solved at the source.

10: knife block 11: knife (heating wire)
12: knife fixed terminal 13: main block
14: Pin 15: Sub Block
16: spring 17: knife mounting groove
18: corner groove 19: corner block
20a, 20b: Spring loaded groove 21: Knife insertion groove
22: wire 23: knife fastening groove
100: frame 110: bracket
120: rotation axis 130: support
140: knife assembly

Claims (3)

A knife block 10 having a built-in cartridge shape for heating the knife and having a “b” shaped assembled shape, and a knife 11 that are side-by-side coupled along the lower end of the knife block 10 to fusion-cut the packaging film. In the knife assembly of the product packaging apparatus using a packaging film comprising a, and a knife fixing terminal 12 for fixing the knife 11 is coupled to both ends of the knife block 10,
The knife fixing terminal 12 is made of a non-conductive material for preventing electric conduction and is fixed to the knife block 10 side by a main block 13, and the main block 13 has a lower end by a pin 14. The packaging film, characterized in that it comprises a sub-block 15 is coupled to the rotatable and the upper end is fastened and fixed to the end of the knife 11 and rotates in accordance with the length change during knife expansion to accommodate the knife length change at this time Knife assembly of used product packaging device.
The method of claim 1, wherein the main block 13 and the sub block 15 is installed in a structure that is supported at both ends, further comprising a spring 16 for elastically supporting the rotation of the sub block (15). Knife assembly of product packaging device using packaging film.
The corner block 19 according to claim 1 or 2, wherein the corner portion of the main block 13 has a corner groove portion 18 formed in a gentle curved shape while communicating with the knife mounting groove 17 formed in the block. Is mounted, the knife assembly of the product packaging device using a packaging film, characterized in that the knife corner portion to be maintained in a rounded form.

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