1. A film coating process of a heat shrinkable film of a cigarette packing box comprises the heat shrinkable film coated on the periphery of the cigarette packing box, and is characterized in that: the heat-shrinkable film comprises four long edges and two short edges, wherein a first short edge corner sealing welding line is cut on the two short edges in the width direction, a second short edge corner sealing welding line is cut on the two short edges in the length direction, and a long edge corner sealing welding line is cut on any one of the four long edges in the length direction.

2. The film coating process of a heat shrinkable film for cigarette packs according to claim 1, wherein seven corner sealing weld lines are provided after the heat shrinkable film is heat-shrunk, one of the short side corner sealing weld lines is provided with four, two of the short side corner sealing weld lines is provided with two, and one of the long side corner sealing weld lines is provided with one.

3. The film wrapping process for a heat shrinkable film for cigarette packs according to claim 2, wherein the short side corner seal weld lines are cut two by two symmetrically in the width direction of the short side, the short side corner seal weld lines are cut two in the length direction of the short side and between the short side corner seal weld lines, and the long side corner seal weld lines are cut in the length direction of the long side.

4. The film wrapping process of a heat shrinkable film for cigarette packs according to claim 2, wherein the corner sealing weld line on the heat shrinkable film overlaps the fold line of the cigarette pack.

5. The film-coating process of a heat-shrinkable film for cigarette packs according to claim 1, wherein the two short sides are completely pressed against both sides of the cigarette pack when the corner cut seals are welded.

6. The film coating process of a heat shrinkable film for cigarette packs according to claim 1, wherein the four long sides are attached to the front, rear, upper and lower sides of the cigarette pack, and the two short sides are attached to the left and right sides of the cigarette pack.

7. The process for wrapping a heat-shrinkable film for cigarette packs according to claim 1, wherein a pulling thread for opening the wrapping film of the cigarette pack is further stuck to the heat-shrinkable film.

8. The film-coating process of a heat-shrinkable film for cigarette packs according to claim 1, wherein the corner sealing weld lines of the two short sides of the heat-shrinkable film are overlapped on any one of the four long sides.

Background

At present, the heat-shrinkable film coating mode of domestic cigarettes adopts the following modes:

1. sealing films at two short sides of the whole box: the heat shrinkable film coating mode of the cigarette adopts a folding and heat shrinking mode (trapezoidal folding) of the heat shrinkable film at the short sides of the two ends of a strip box (10 small boxes);

2. sealing the film at the long side of the whole box: the long edge of the middle part is folded and overlapped on one of the four surfaces, and then the film is sealed by heating and laminating.

The prior cigarette heat-shrinkable film coating technology has the following defects:

1. the existing cigarette coating process technology is extremely mature and easy to imitate, and is one of the reasons for producing fake and counterfeit cigarettes in the market;

2. the folded and attached part of the heat-shrinkable film has rough appearance and a large number of wrinkle lines, so that the visual attractiveness is influenced;

3. the prior art of cigarette heat shrinkable films adopts a folding, heating, laminating and coating mode, the folded overlapped parts are more, the folded parts cannot be completely laminated into a whole after lamination, residual air is difficult to discharge, a large number of bubbles are generated, gaps or gaps exist among the heat shrinkable films, and the flatness of two ends and the side faces of a cigarette case is influenced;

4. the moisture-proof effect is poor, and moisture that contains in the air is easy to be followed the position of not laminating completely and spilled into inside the cigarette barrel, causes the cigarette humidity to go mouldy easily and can't sell, causes certain economic loss, leads to the peculiar fragrance of tobacco to volatilize and dispel in the air and influence cigarette taste.

Therefore, a new transparent heat shrinkable film coating process technology for cigarette packaging boxes is needed to solve the above problems.

Disclosure of Invention

The invention mainly aims to provide a coating process of a heat shrinkable film of a cigarette packaging box, and aims to solve the technical problems that when the existing transparent heat shrinkable film is coated, the joint part of the transparent heat shrinkable film and the cigarette packaging box has wrinkle grains, so that the appearance is influenced, and common workers are difficult to forge and imitate.

In order to achieve the purpose, the invention provides a film coating process of a heat-shrinkable film of a cigarette packaging box, which comprises the heat-shrinkable film wrapped on the periphery of the cigarette packaging box, wherein the heat-shrinkable film comprises four long sides and two short sides, a first short side corner sealing welding line is cut in the width direction of the two short sides, a second short side corner sealing welding line is cut in the length direction of the two short sides, and a long side corner sealing welding line is cut in the length direction of any one long side of the four long sides.

Preferably, the heat-shrinkable film is provided with seven corner sealing weld lines after being subjected to heat-shrinking forming, the first short-edge corner sealing weld line is provided with four, the second short-edge corner sealing weld line is provided with two, and the long-edge corner sealing weld line is provided with one.

Preferably, the short side corner sealing weld lines are symmetrically arranged in the width direction of the short side, the short side corner sealing weld lines are symmetrically arranged in the length direction of the short side, the short side corner sealing weld lines are arranged between the two short side corner sealing weld lines, and the long side corner sealing weld lines are arranged in the length direction of the long side.

Preferably, the corner seal weld lines on the heat shrink film overlap the fold lines of the cigarette pack.

Preferably, the two short edges are completely pressed against the two sides of the cigarette package when the corner cut seal is welded.

Preferably, the four long sides are attached to the front, rear, upper and lower sides of the cigarette pack and the two short sides are attached to the left and right sides of the cigarette pack.

Preferably, the heat-shrinkable film is further adhered with a pull string for opening the envelope of the cigarette pack.

Preferably, the corner sealing weld lines of the two short sides of the heat-shrinkable film are overlapped on any one corner of the four long sides.

The technical scheme of the invention has the beneficial effects that:

according to the film coating process of the heat-shrinkable film for the cigarette packaging box, the corners of the long side and the short side are provided with the plurality of sealing welding lines, so that the long side and the short side of the heat-shrinkable film are not folded, and are smooth and flat after being coated.

Also has the following characteristics:

1. the heat-shrinkable film-wrapping sealing technology of the outer film of the cigarette packaging box is difficult to imitate, and manual manufacturing is time-consuming and difficult;

2. the short side surfaces at two ends of the thermal contraction coating of the transparent thermal contraction film outside the cigarette carton are smooth and flat without folds;

3. the sealing films on four long sides of the cigarette carton after the transparent heat shrinkable film is subjected to heat shrinkage and film coating are smooth and have no wrinkles;

4. the sealing welding line of the outer packaging film of the cigarette carton is neat and uniform, and the appearance is attractive;

5. after the outer side of the cigarette packaging box is coated with the film, no obvious air bubbles are generated in the film;

6. the corner cutting heat shrinkable film sealing weld line of the cigarette carton outer heat shrinkable film is firm, the sealing performance is good, and no gap exists;

7. after the cigarette carton outer heat shrinkable film coating adopts the process method, as long as the heat shrinkable film is not damaged, the heat shrinkable film hardly permeates water into the packaging box within the quality life cycle.

Drawings

Fig. 1 is a perspective structural view schematically illustrating an embodiment of a process for wrapping a heat shrinkable film for cigarette packs according to the present invention;

fig. 2 is a schematic view showing an embodiment of a process for wrapping a heat-shrinkable film for cigarette packs according to the present invention;

fig. 3 is a schematic perspective view illustrating a process of wrapping a heat-shrinkable film for cigarette packs according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a short side of an embodiment of a process of wrapping a heat shrinkable film for cigarette packs according to the present invention;

fig. 5 is a schematic structural view of a long side of an embodiment of the film coating process of the heat shrinkable film for cigarette packs according to the present invention;

fig. 6 is a schematic structural view of the other long side of the heat-shrinkable film wrapping process for cigarette packs according to an embodiment of the present invention.

In the figure: 1 heat-shrinkable film, 11 long sides, 111 long side corner sealing weld lines, 12 short sides, 121 short side corner sealing weld lines I and 122 short side corner sealing weld lines II.

Detailed Description

In the following, the embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it is to be understood that the embodiments are only a part of the embodiments of the present invention, and not all of the embodiments are described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a film coating process of a heat shrinkable film of a cigarette packaging box, which comprises the heat shrinkable film 1 wrapped on the periphery of the cigarette packaging box, wherein the heat shrinkable film 1 comprises four long sides 11 and two short sides 12, a first short side corner sealing welding line 121 is cut in the width direction of the two short sides 12, a second short side corner sealing welding line 122 is cut in the length direction of the two short sides 12, and a long side corner sealing welding line 111 is cut in the length direction of any one long side of the four long sides 11.

According to the film coating process of the heat shrinkable film for the cigarette packaging box, the transparent heat shrinkable film is coated on the outer side of the cigarette packaging box and mainly plays roles in sealing and protecting. Generally, cigarette packs are long and square and are formed by folding the pack, so that a plurality of folding lines are formed around the pack. The heat-shrinkable film 1 is a plastic heat-shrinkable film.

Firstly, the heat-shrinkable film 1 comprises four long sides 11 and two short sides 12 which respectively correspond to the four long sides and the two short sides of the cigarette packaging box, and when the film is coated and formed, the corner sealing welding lines of the heat-shrinkable film are heated to shrink and attach the heat-shrinkable film to the outer side of the packaging box, so that no crease exists after the heat-shrinkable film sealing welding lines are finished, and the heat-shrinkable film is smooth and flat.

Secondly, cutting a plurality of corner sealing welding lines on the corners of the long side 11 and the short side 12 of the heat-shrinkable film 1, wherein the short side 12 is cut with a short side corner sealing welding line I121 in the width direction, the short side 12 on one side is cut with two short side corner sealing welding lines I121 in parallel, the short sides 12 on two sides are cut with four short side corner sealing welding lines I121, one end point of the short side corner sealing welding line I121 is connected with the side surface of the long side 11, and the other end point is not connected with the side surface of the long side; the second short side corner sealing weld line 122 is arranged in the length direction of the short side 12, the long side corner sealing weld line 111 is cut in the length direction of the long side 11, and the long side corner sealing weld line 111 can be arranged on any corner of the long side.

The invention relates to a coating process of a heat shrinkable film of a cigarette packaging box, which has the following characteristics:

1. the sealing weld line technology of the transparent envelope is difficult to imitate, and the manual manufacturing is extremely difficult;

2. the short side surfaces at two ends of the transparent heat shrinkable film coating are flat and smooth without folds;

3. the sealing films on four long sides of the transparent heat shrinkable film envelope are flat and smooth and have no wrinkles;

4. the envelope sealing welding line is neat and uniform, and the appearance is attractive;

5. after the outer side of the cigarette packaging box is coated with the film, no air bubbles are generated in the film;

6. the transparent heat-shrinkable film-coated sealing weld line is firm, has good sealing performance and has no gap;

7. as long as the heat shrinkable film envelope is not damaged, moisture does not permeate into the package box during the life cycle.

In a preferred embodiment, referring to fig. 1, 2 and 3, the heat-shrinkable film for cigarette packs of the present invention, after heat-shrink molding, has seven corner seal weld lines, four of the short-side corner seal weld lines one 121, two of the short-side corner seal weld lines two 122, and one of the long-side corner seal weld lines 111. Specifically, the short side corner sealing weld lines 121 are respectively cut on both sides of the short side in the width direction, the short side corner sealing weld lines 122 are respectively cut on both sides of the short side in the length direction, and the long side corner sealing weld lines 111 are cut on any one corner of the long side in the length direction.

In a preferred embodiment, referring to fig. 1, 2 and 3, in the heat-shrinkable film for cigarette packs of the present invention, short-side corner seal weld lines one 121 are cut two by two symmetrically in the width direction of the short side 12, short-side corner seal weld lines two 122 are cut in the length direction of the short side 12 and between the short-side corner seal weld lines one 121, and long-side corner seal weld lines 111 are cut in the length direction of the long side 11.

In a preferred embodiment, referring to fig. 1-6, the heat-shrinkable film of the cigarette pack of the present invention, the corner cut seal weld line on the heat-shrinkable film envelope 1 overlaps the fold line of the cigarette pack. Because all the corner cutting sealing welding lines on the thermal contraction film 1 are overlapped with the folding line of the cigarette packing box when being processed, the outer side of the cigarette packing box can be ensured to have no folds after being attached with a coating film, the surface is smooth and flat, and the sealing and waterproof effects are achieved.

In a preferred embodiment, referring to FIG. 2, the heat-shrinkable film of the cigarette pack of the present invention has two short sides 12 which are completely pressed against both sides of the cigarette pack at the time of the corner cut seal weld line. The heat shrinkable film 1 is attached to the outer side of the cigarette packaging box by adopting a heating film coating forming mode, wherein after the long side 11 is coated, when the short sides 12 at two sides of the heat shrinkable film 1 are at a sealing welding line, the heat shrinkable film 1 needs to be folded towards two sides of the cigarette packaging box so as to be completely attached to the cigarette packaging box.

In a preferred embodiment, referring to figures 1-6, the heat-shrinkable film of the cigarette pack of the present invention has four long sides 11 attached to the front, rear, upper and lower sides of the cigarette pack and two short sides 12 attached to the left and right sides of the cigarette pack. The long side 11 and the short side 12 of the heat-shrinkable film completely wrap the cigarette pack, it being noted that the length and width of the long side 11 are slightly greater than those of the long side of the cigarette pack, and the length and width of the short side 12 are not greater than those of the short side of the cigarette pack.

In a preferred embodiment, referring to fig. 1-6, the heat-shrinkable film of the cigarette pack of the present invention may further have a pull-string bonded thereto for opening the cigarette pack. The stay wire is usually a half-buried stay wire, so that the heat shrinkable film is convenient to open, and the cigarette packaging box is further convenient to open.

In a preferred embodiment, referring to fig. 1 to 6, the corner sealing weld lines of the two short sides 12 of the heat-shrinkable film of the cigarette pack of the present invention are overlapped on any one corner of the four long sides 11. During the coating process, the four long sides 11 are sealed, and then the two short sides are sealed on the seals of the four long sides, so that the coating integrity of the heat-shrinkable film of the cigarette packaging box is ensured.

The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes, which are made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.