CN110238905B

CN110238905B - PE thermal contraction membrane pore-forming equipment for cigarette

Info

Publication number: CN110238905B
Application number: CN201910665585.1A
Authority: CN
Inventors: 李滨; 刘盛梅; 谢朝钦; 王昌政; 罗鸣
Original assignee: Qiannan Branch Of Guizhou Tobacco Co
Current assignee: Qiannan Branch Of Guizhou Tobacco Co
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-04-20
Anticipated expiration: 2039-07-23
Also published as: CN110238905A

Abstract

The invention discloses PE (polyethylene) heat shrinkable film pore-forming equipment for cigarettes, which comprises a molding device and a forming device positioned at the tail end of the molding device; the molding device comprises a first frame body, a bottom plate arranged on the first frame body and a top plate capable of moving up and down relative to the bottom plate, wherein a plurality of through holes are formed in the bottom plate, a plurality of stamping columns corresponding to the through holes are arranged on the top plate, the end surfaces of the free ends of the stamping columns are round or nearly round, a penetrating needle is arranged at the center of the stamping column, and a plurality of pressing strips are arranged along the radial direction; the forming device comprises a second frame body adjacent to the first frame body and an air heater connected with the second frame body. The hole forming equipment for the PE heat shrinkable film for the cigarettes can be directly connected to the existing production line for the PE heat shrinkable film for the cigarettes, and the film holes with thick edges are formed in the PE heat shrinkable film for the cigarettes, so that the crease lines can be stopped at the edges of the film holes, the package body is prevented from being further damaged, and the performance of the PE heat shrinkable film for the cigarettes is improved under the condition of reducing raw materials.

Description

PE thermal contraction membrane pore-forming equipment for cigarette

Technical Field

The invention relates to the field of film production, in particular to pore-forming equipment for a PE (polyethylene) heat shrinkable film for cigarettes.

Background

The PE heat shrinkable film is a surface protective film, has the characteristics of high tensile strength, high elongation, good self-adhesion, high transparency and the like, and is widely applied to centralized packaging of various goods. The PE heat shrinkable film provides surface protection for products, forms a light and protective appearance around the products, thereby achieving the purposes of dust prevention, oil resistance, moisture resistance, water resistance and theft prevention, and particularly, the winding film package enables packaged articles to be uniformly stressed and avoids the articles from being damaged by uneven stress, which can not be achieved by the traditional packaging mode (bundling, packaging, adhesive tape packaging and the like).

For the tobacco industry, the PE heat shrinkable film is generally used to pack a whole or multiple cigarettes, and mainly to integrate and compact the cigarettes to form a regular package to protect the appearance of the product and facilitate transportation. But the PE heat shrinkable film is influenced by air expansion in the heat shrinkable process and is easy to influence the packaging effect, and meanwhile, the PE film has a large use amount, so that the articles are easy to scatter once the packaging film is deformed particularly for small articles such as cigarette strips; and because the PE heat shrinkable film is coated on the whole cigarette smoothly, the whole cigarette can be packed and transported again, and the operation can only be carried out on the whole cigarette, and the operation can not be only carried out on one point, so that the further packing and transporting modes are limited. Therefore, it is necessary to provide a further solution to the above problems.

Disclosure of Invention

The invention aims to provide PE heat shrinkable film pore-forming equipment for cigarettes, so as to overcome the defects in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a pore-forming device for a PE heat shrinkable film for cigarettes comprises a molding device and a forming device positioned at the tail end of the molding device;

the molding device comprises a first frame body, a bottom plate arranged on the first frame body and a top plate capable of moving up and down relative to the bottom plate, wherein a plurality of through holes are formed in the bottom plate, a plurality of die columns corresponding to the through holes are arranged on the top plate, the end surfaces of the free ends of the die columns are round or nearly round, a penetrating needle is arranged at the center of the die columns, and a plurality of pressing strips are arranged along the radial direction;

the molding device comprises a second frame body adjacent to the first frame body and an air heater connected with the second frame body.

Preferably, the puncture needle is in a ring cylinder shape.

Preferably, a ventilation cavity is arranged in the die column and is communicated with the other end of the penetrating needle and the other end of the die column.

Preferably, a collecting frame is arranged below the bottom plate.

Preferably, at least one side edge of the bead faces the base plate.

Preferably, the bead is a triangular prism.

Preferably, the pressing strip is tapered from the center point of the free end surface of the die column to the periphery.

Preferably, the pressing strip is a triangular frustum or a triangular pyramid, and the lower bottom surface of the triangular frustum or the bottom surface of the triangular pyramid props against the side wall of the penetrating needle.

Preferably, the end face of the free end of the punching column is elliptical, and the minor axis of the punching column is parallel to the advancing direction of the PE heat shrinkable film for cigarettes.

Preferably, the blowing temperature of the hot air blower is 95-135 degrees.

Preferably, a plurality of driving or driven guide rollers are arranged in each of the first frame body and the second frame body.

Preferably, the molding device further comprises a driving mechanism which is arranged on the first frame body and drives the top plate to move up and down.

Compared with the prior art, the invention has the beneficial effects that:

(1) the hole forming equipment for the PE heat shrinkable film for the cigarettes can be directly connected to the existing production line for the PE heat shrinkable film for the cigarettes, and a plurality of film holes with thicker edges are formed in the film, so that the scribing lines can be stopped at the edges of the film holes, the package body is prevented from being further damaged, and the performance of the PE heat shrinkable film for the cigarettes is improved under the condition of not increasing raw materials; and in the packing stage, the membrane hole still is favorable to discharging because of the bubble that the misoperation produced for the cladding is inseparabler, also can collude a plurality of packing bodys through the membrane hole, and the membrane hole is difficult for tearing, provides multiple packing and transport mode, reduces the use amount of PE membrane raw materials.

(2) According to the invention, the die post is adopted to firstly generate the shape of the film hole model on the film, the forming shape of the film hole is effectively guided, the needle is penetrated to puncture the film to provide a melting forming initial opening, and the pressing strip guides the melting direction, so that the shapes of a plurality of film holes are more uniform and regular.

(3) The invention adopts the stamping column with the elliptic end surface, and the short shaft of the stamping column is parallel to the advancing direction of the film so as to counteract the stretching deformation of the film along the advancing direction in the advancing process, so that the formed film hole is closer to a circle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic perspective view of a molding apparatus of the present invention;

FIG. 3 is a schematic perspective view of the molding apparatus of the present invention;

FIG. 4 is an enlarged perspective view of a punch post according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of a die post according to an embodiment of the present invention;

fig. 6 is an enlarged view of a die post portion according to another embodiment of the present invention.

Specifically, 100-molding device, 101-first frame body, 102-bottom plate, 103-top plate, 104-through hole, 105-die column, 106-needle threading, 107-pressing strip, 108-ventilation cavity, 200-molding device, 201-second frame body, 202-air heater, 203-air outlet, 204-pipeline, 300-guide roller, 400-driving mechanism, 401-push rod and 402-fixing block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

As shown in fig. 1, a pore-forming device for a PE heat shrinkable film for cigarettes comprises a molding device 100 and a forming device 200 located at the end of the molding device 100, wherein the end is pointed with reference to the advancing direction of the PE heat shrinkable film for cigarettes, i.e. a film hole model shape is firstly manufactured by the molding device 100, and then a film hole is finally formed along the model shape by the forming device 200, in this embodiment, the pointed direction of arrow a.

As shown in fig. 2, the molding device 100 includes a first frame 101, a bottom plate 102 disposed on the first frame 101, and a top plate 103 capable of moving up and down relative to the bottom plate 102, wherein the film is driven by a guide roller 300 to enter between the top plate 103 and the bottom plate 102, and is paused for a while, and the top plate 103 moves down, so as to realize the extrusion of the hole pattern shape on the film surface. In this embodiment, the bottom plate 102 is disposed on the first frame body 101, and the top plate 103 is sleeved on four support columns of the first frame body 101 and moves up and down along the support columns, or, of course, a guide column may be disposed between the bottom plate 102 and the top plate 103 and is positioned by the guide column to move up and down. The bottom plate 102 is also provided with a plurality of through holes 104, the top plate 103 is provided with a plurality of punching columns 105 corresponding to the through holes 104, the punching columns 105 move downwards, and part or all of the punching columns enter the through holes 104 to form a film hole model shape on the film. In this embodiment, the through hole 104 is used to freely control the downward movement distance and facilitate the falling of the film fragments, however, in other embodiments, a groove may be used, or a collecting frame is disposed below the bottom plate 102 to collect the film fragments for secondary recycling and reprocessing.

The molding device 100 further includes a driving mechanism 400 disposed on the first frame body 101 and driving the top plate 103 to move up and down. In this embodiment, the driving mechanism 400 is an electric push rod, and a push rod 401 thereof is connected to the top plate 103 through a fixing block 402 to control the top plate 103 to move up and down along the four side columns of the first frame 101. Of course, the driving mechanism 400 may be another power mechanism as long as it can control the top plate 103 to move linearly up and down.

As shown in fig. 3, the molding apparatus 200 includes a second frame 201 adjacent to the first frame 101, and a heat blower 202 connected to the second frame 201. After the thin film passes through the molding apparatus 100, the film holes are finally formed by the molding apparatus 200. The air heater 202 may be of any type available on the market, or may be of any other type capable of generating high temperature air. The air outlet 203 is erected on the second frame body 201, a conical air outlet is preferably adopted, high-temperature hot air is conveyed to the air outlet 203 through the pipeline 204, the air blowing temperature of the hot air blower 202 is preferably 95-135 degrees, the air blowing temperature can be further set according to actual production requirements, part of the thin film is melted along the shape of the model, and finally film holes are formed.

The first frame body 101 and the second frame body 201 are respectively provided with a plurality of driving or driven guide rollers 300, and the film is drawn into the molding device 100 and the molding device 200 under the traction and guide effects of the guide rollers 300, so that the processes are sequentially completed.

As shown in fig. 4 and 5, the end surface of the free end of the die column 105 is circular or nearly circular, the center of the free end is provided with a penetrating needle 106, and a plurality of pressing strips 107 are arranged along the radial direction, the penetrating needle 106 penetrates the surface of the film to form a film hole forming initial opening, and the pressing strips 107 form a forming guide line extending outwards from the forming initial opening on the surface of the film to guide the film hole forming direction. The hot air blower is turned on, the film starts to melt from the initial opening and diffuses along the guide line, and the size of the film hole is controlled by controlling the temperature and time of the hot air blower. Preferably, the needle 106 is in the shape of a circular cylinder, so that a larger initial opening is formed on the film to accelerate the formation of the film hole. In this case, since the cut film is likely to enter the inside of the piercing pin 106 and needs to be cleaned periodically, it is preferable that a vent chamber 108 is provided in the die post 105, the vent chamber 108 communicates the piercing pin 106 with the other end of the die post 105, and the piercing pin 106 is cleaned by blowing out the residual film by supplying high-pressure gas into the vent chamber 108 of the die post 105. The bead 107 is preferably arranged with at least one lateral edge facing the base plate 102 to form a relatively well-defined guideline, and in general the bead 107 may be a triangular prism.

In another embodiment, as shown in fig. 6, the end face of the free end of the die column 105 is elliptical and the minor axis thereof is parallel to the advancing direction of the PE heat shrinkable film for cigarettes to counteract the stretching of the film itself during the advancing process, so that the formed film hole is more nearly circular. The pressing bar 107 can also be tapered from the central point of the end face of the free end of the die column 105 to the periphery, i.e. a triangular table or a triangular pyramid can be generally adopted, and the lower bottom surface of the triangular table or the bottom surface of the triangular pyramid butts against the side wall of the penetrating needle 106, so that the guide line is gradually shallower from the central point outwards, the melting process is gradually slowed down, the melting in all directions is controlled, and the phenomenon that the shape of the film hole is too irregular due to improper melting is prevented.

In summary, the invention forms a film hole model shape on the surface of the PE heat shrinkable film for cigarettes through the molding device, and then melts and forms the film hole along the model shape through the molding device, so that the edge of the film hole is thicker than other parts of the heat shrinkable film, the position strength of the film part is enhanced under the condition of not increasing raw materials, the continuation of the broken scratch is effectively prevented, the hooking position is provided, the hooking part is not easy to tear, and various fixing and carrying modes are facilitated.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The pore-forming equipment for the PE heat shrinkable film for the cigarettes is characterized by comprising a molding device (100) and a forming device (200) positioned at the tail end of the molding device (100);

the molding device (100) comprises a first frame body (101), a bottom plate (102) arranged on the first frame body (101), and a top plate (103) capable of moving up and down relative to the bottom plate (102), wherein a plurality of through holes (104) are formed in the bottom plate (102), a plurality of stamping columns (105) corresponding to the through holes (104) are arranged on the top plate (103), the end surface of the free end of each stamping column (105) is round or nearly round, a penetrating needle (106) is arranged at the center of each stamping column, and a plurality of pressing strips (107) are arranged along the radial direction;

the molding device (200) comprises a second frame body (201) adjacent to the first frame body (101) and a hot air blower (202) connected with the second frame body (201);

the needle (106) is in a ring cylinder shape;

at least one lateral edge of the pressing strip (107) faces the base plate (102);

the pressing strip (107) is a triangular prism;

the pressing strip (107) is tapered from the central point of the free end surface of the stamping column (105) to the periphery;

the pressing strip (107) is a triangular frustum or a triangular pyramid, and the lower bottom surface of the triangular frustum or the bottom surface of the triangular pyramid props against the side wall of the penetrating needle (106);

the end face of the free end of the punching column (105) is oval, and the short axis of the punching column is parallel to the advancing direction of the PE heat shrinkable film for cigarettes.

2. The PE heat shrinkable film pore-forming equipment for cigarettes as claimed in claim 1, wherein the blowing temperature of the hot air blower (202) is 95-135 °.

3. The PE heat shrinkable film pore-forming equipment for cigarettes according to claim 1, wherein a plurality of driving or driven guide rollers (300) are arranged in each of the first frame body (101) and the second frame body (201).

4. The PE heat shrinkable film pore-forming equipment for cigarettes according to claim 1, wherein the molding device (100) further comprises a driving mechanism (400) which is arranged on the first frame body (101) and drives the top plate (103) to move up and down.