CN211167666U

CN211167666U - Visual packaging equipment

Info

Publication number: CN211167666U
Application number: CN201921821824.XU
Authority: CN
Inventors: 胡继承; 张昊; 周海峰
Original assignee: Shenzhen Qiming Integrated Intelligent Packaging Technology Co ltd
Current assignee: Shenzhen Qiming Integrated Intelligent Packaging Technology Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-08-04
Anticipated expiration: 2029-10-28

Abstract

The utility model relates to a visual equipment for packing for on the product is wrapped up transparent shrink film, the shrink film includes first part film and second part film, include: the conveying device is used for conveying the products to each station; the film covering device can cover a first part of film on the top of the product, and the first part of film has excess materials and droops to the circumferential outer side of the product; the film enclosing device can surround a second part of film in the circumferential direction of the product, the second part of film has excess materials towards the top and the bottom of the product, the excess materials of the second part of film, which exceed the top of the product, are overlapped and attached tightly with the excess materials of the first part of film, and the excess materials of the second part of film, which exceed the bottom of the product, are attached to the bottom of the product; and the heating and shrinking device is used for heating and shrinking the first part of film and the second part of film on the product. The visual packaging equipment can coat the product with the film quickly and accurately, and has a good packaging effect.

Description

Visual packaging equipment

Technical Field

The utility model relates to a technical field of packing especially relates to visual equipment for packing.

Background

Visual packaging process status: firstly, a film is covered on the top of a product manually, then another film is wound on the periphery of the product manually, the film is cut off and welded, and finally, the film on the outer side of the product is heated manually by using a hot air gun to shrink the film. The operation mode has the advantages of lower working efficiency and high labor intensity, and operators can easily collide products.

SUMMERY OF THE UTILITY MODEL

Therefore, the visual packaging equipment which can quickly and accurately coat the product and has a good packaging effect is needed to be provided for the problem that the product coating film is low in efficiency.

A visual packaging apparatus for applying a transparent shrink film to a product, said shrink film including a first portion of film and a second portion of film, comprising:

the conveying device is used for conveying the products to each station;

the film covering device can cover the first part of the film on the top of the product, and the first part of the film has excess materials and hangs down to the circumferential outer side of the product;

the film enclosing device can surround the second part of film in the circumferential direction of the product, excess materials are arranged on the second part of film in the directions towards the top and the bottom of the product, at least part of the second part of film is overlapped and attached to the first part of film, and the excess materials of the second part of film, which exceed the bottom of the product, are attached to the bottom of the product; and

and the heat shrinking device is used for heating and shrinking the first part of film and the second part of film on the product.

Above-mentioned visual equipment for packing, locate the top of product through the automatic first part film lid of film covering device, and form the clout to product flagging all around, enclose the membrane device with the second part film automatic around locating on the circumference outside of product, and be equipped with the clout towards the direction of product top and bottom, the clout of second part film towards the product top combines with the clout of first part film, form the complete combination of second part film and first part film, the second part film is laminated to the product bottom towards product bottom clout, at last by the shrink heating device with first part film and the shrink heating of second part film, accomplish the visual automatic packaging of product. This visual equipment for packing can realize automatic operation, and efficiency improves greatly, and has reduced operating personnel intensity of labour and has ensured operating personnel's personal safety.

In one embodiment, the conveying device includes a frame, a roller set and a transmission member, the roller set is rotatably disposed on the frame, the product is disposed on the roller set, the transmission member is disposed on the frame, and the transmission member can drive the roller set to rotatably drive the product to move to each station. Can realize the stable, accurate conveying to the product.

In one embodiment, the transmission part comprises a motor, a driving wheel, a driven wheel, a first transmission belt and a second transmission belt, the motor is arranged on the rack, the driving wheel is linked with the output end of the motor, the driven wheel is arranged on one roller shaft of the roller shaft group, the two opposite ends of the first transmission belt are respectively sleeved on the driving wheel and the driven wheel, the second transmission belt is sleeved on all the roller shafts of the roller shaft group, and the motor drives one roller shaft of the roller shaft group to rotate so as to drive the other roller shafts of the roller shaft group to rotate. Through the cooperation drive of motor, gear and conveyer belt, can guarantee to rotate the conduction effect better, more stable, smooth and easy to the conveying drive of product.

In one embodiment, the film covering device comprises a carriage, a film clamping member, a guide rod and a cutting member, the first part of the film is arranged in a coil shape, the carriage extends towards the upper part of the conveying device, the film clamping member is slidably arranged on the carriage, the guide rod is arranged on the carriage, the end part of the first part of the film is wound on the guide rod and is connected with the film clamping member, the cutting member is arranged close to the guide rod, the film clamping member pulls out the first part of the film in a sliding manner along the carriage, and the carriage can drive the pulled out first part of the film to move towards the top of the product, so that the first part of the film covers the top of the product, and the first part of the film at the position of the guide rod is cut off through the cutting member. Product top is located to the first portion film lid that can be more accurate, convenient, and guarantees the flagging clout of first portion film outside towards product circumference.

In one embodiment, the film enclosing device includes a film enclosing stand, a first film enclosing member and a second film enclosing member, the product has a first face, a second face and another face between the first face and the second face along the circumferential direction, the film enclosing stand has an opening, the conveying device can convey the product through the opening, the first film enclosing member and the second film enclosing member are respectively arranged at two sides of the opening and can move towards each other, the middle part of the second partial film abuts against the opening, when the product passes through the opening, the first face abuts against the middle part of the second partial film, the first face and the other face are wrapped by the second partial film along with the driving of the conveying device, when the second face passes through the opening, the first film enclosing member and the second film enclosing member move towards each other to press the second partial film onto the second face, and cutting and welding the second part of the film. The operation of enclosing the second part film on locating the product circumference outside is more convenient, and the product only need move under conveyer's conveying, just can make the second part film cladding to the product circumference outside on, and the cooperation that first enclosing membrane spare and second enclosing membrane spare can be fine compresses tightly and fuses the both ends of second part film, forms the cladding to the whole circumference outside of product.

In one embodiment, two ends of the second partial film are arranged in a roll form, the two end rolls of the second partial film are respectively located at two sides of the opening, and the middle parts of the two ends of the second partial film are abutted against the opening. The product can support and press the second part film under conveyer's conveying, and the second part film that the coil stock set up can automatic blowing under the support pressure of product, and is more convenient wraps up the product.

In one embodiment, one of the following features is included: the coil materials at two ends of the second part of the film are discharged in the horizontal direction; the film enclosing device further comprises a first material transferring rod and a second material transferring rod, the first material transferring rod and the second material transferring rod are located on two sides of the opening respectively, material rolling at two ends of the second part of the film is discharged in the vertical direction, and the material is pressed and converted into horizontal direction discharging through the first material transferring rod and the second material transferring rod respectively. The coating effect of the second part of film on the product is better.

In one embodiment, the heat shrinking device is a frame structure, and the product vertically or horizontally passes through the heat shrinking device, so that the first partial film and the second partial film are heat shrunk.

In one embodiment, the heat shrinking device includes a first heating frame, a second heating frame, and a rotating device, the first heating frame and the second heating frame are disposed on the conveying device at intervals, the rotating device is disposed between the first heating frame and the second heating frame, the product is conveyed through the first heating frame by the conveying device, the first heating frame heats a portion of the first partial film and a portion of the second partial film on the product, the product is conveyed to the rotating device by the conveying device, the rotating device drives the product to rotate 90 ° and pass through the second heating frame under the conveying of the conveying device, and the second heating frame heats the other portion of the first partial film and the second partial film on the product. The first part of film and the second part of film on the product can be heated more quickly and conveniently, so that the first part of film and the second part of film are shrunk and attached to the product.

In one embodiment, the conveying device comprises a first conveying section and a second conveying section which are connected with each other, the conveying direction of the first conveying section is vertical to the conveying direction of the second conveying section, the heating and shrinking device comprises a third heating frame and a fourth heating frame, the third heating frame is arranged on the first conveying section, the fourth heating frame is arranged on the second conveying section, the first conveying section conveys the product to pass through the third heating frame, and heating a part of the first partial film and the second partial film on the product through the third heating frame, wherein the product is conveyed to the second conveying section from the first conveying section, and the product is conveyed by the second conveying section through the fourth heating frame, and the fourth heating frame heats the first part of the film and the second part of the film on the other part of the product. The first part of film and the second part of film on the product can be heated more quickly and conveniently, so that the first part of film and the second part of film are shrunk and attached to the product.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a visual packaging apparatus of the present invention;

FIG. 2 is a schematic illustration of the effect of the packaged product;

FIG. 3 is a schematic structural view of an embodiment of the heat shrinking device in the visual packaging apparatus shown in FIG. 1;

fig. 4 is a schematic structural view of another embodiment of the heat shrinking device in the visual packaging equipment shown in fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a conveying device; 11. a frame; 12. a roller shaft group; 13. a first transfer section; 14. a second transfer section; 21. a carriage; 22. a film clamping piece; 23. a guide bar; 31. a surrounding film stand; 32. a first membrane enclosing member; 33. a second enclosure member; 34. an opening; 35. a first transfer bar; 36. a second material transferring rod; 4. a heat shrinking device; 41. a first heating frame; 42. a second heating frame; 43. a rotating device; 44. a third heating frame; 45. a fourth heating frame; 5. producing a product; 51. a top surface; 52. a bottom surface; 53. a front face; 54. a rear side; 55. the left side; 56. right side; 61. a first portion of the film; 62. a second portion of the film.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The visual packaging is carton-free packaging, and is a packaging mode that a transparent shrink film replaces an outer packaging carton to package a product and a buffer material, and the product can be directly viewed inside the package after the package is finished. The packaging bag is widely applied to packaging of household appliances, mechanical equipment, communication equipment, component transportation, chemical products and the like.

Referring to fig. 1 and 3, in an embodiment, the visual packaging apparatus includes a conveying device 1, a film covering device, a film enclosing device, and a heat shrinking device 4. The utility model discloses a visual equipment for packing is used for with transparent shrink film cladding to product 5 on. The product 5 may be in particular cubic and has six faces: top surface 51, bottom surface 52, front surface 53, rear surface 54, left surface 55 and right surface 56, it being understood that, in the conveying direction of conveyor 1, front surface 53 and rear surface 54 of products 5 are defined. The shrink film includes a first partial film 61 and a second partial film 62. The conveyor 1 is able to convey the products 5 to the various stations. The film covering device can cover the first partial film 61 on the top surface 51 of the product 5, and the first partial film 61 has excess and hangs down to the circumferential outer side of the product 5. The film enclosing device can surround the second part of film 62 on the circumferential outer side of the product 5, the second part of film 62 has remnants towards the top and the bottom of the product 5, the remnants of the second part of film 62 exceeding the top of the product 5 are overlapped and attached tightly with the remnants of the first part of film 61, and the remnants of the second part of film 62 exceeding the bottom of the product 5 are attached to the bottom surface 52 of the product 5. The heat shrinking device 4 is used for heat shrinking the first part film 61 and the second part film 62 on the product 5.

This visual equipment for packing locates the top of product 5 through the automatic first part film 61 lid of film covering device, and form the clout of drooping all around to product 5, enclose the membrane device with second part film 62 automatic around locating on the circumference outside of product 5, and be equipped with the clout towards the direction of product 5 top and bottom, the clout of second part film 62 towards product 5 top combines with the clout of first part film 61, form the complete combination of second part film 62 and first part film 61, second part film 62 is laminated to product 5 bottom towards product 5 bottom clout, at last by the heating and shrinking device 4 with first part film 61 and the shrink of second part film 62, accomplish the visual automatic packing of product 5. Please refer to fig. 2 for the effect structure of the packaged product 5. This visual equipment for packing can realize automatic operation, and efficiency improves greatly, and has reduced operating personnel intensity of labour and has ensured operating personnel's personal safety.

In one embodiment, the transfer device 1 includes a frame 11, a roller set 12, and a transmission member. The roller shaft group 12 is rotatably arranged on the rack 11, the product 5 is arranged on the roller shaft group 12, the transmission part is arranged on the rack 11, the transmission part can drive the roller shaft group 12 to rotatably drive the product 5 to move to each station, and stable and accurate transmission of the product 5 can be realized. Specifically, the transmission part comprises a motor, a driving wheel, a driven wheel, a first conveyor belt and a second conveyor belt. On frame 11 was located to the motor, the output linkage of action wheel and motor, on the roller of roller group 12 was located to the follower, on action wheel, follower were located respectively to the relative both ends of first conveyer belt, on all rollers of roller group 12 were located to the second conveyer belt cover, rotated through a roller of motor drive roller group 12, and then driven roller group 12 other rollers rotate. Through the cooperation drive of motor, gear and conveyer belt, can guarantee to rotate the conduction effect better, more stable, smooth and easy to the conveying drive of product 5.

Referring to fig. 1, in one embodiment, the film covering device includes a carriage 21, a film clamping member 22, a guide rod 23, and a cutting member. The first portion of film 61 is provided in a roll. The carriage 21 extends towards the upper part of the conveying device 1, the film clamping member 22 is slidably disposed on the carriage 21 along the moving direction of the product 5, the guide rod 23 is disposed on the carriage 21, the end part of the first part of the film 61 is wound on the guide rod 23 and connected with the film clamping member 22, specifically, the film clamping member 22 clamps and fixes the end part of the first part of the film 61, the cutting member is disposed near the guide rod 23, the film clamping member 22 slidably pulls out the first part of the film 61 along the carriage 21, and the carriage 21 can drive the pulled out first part of the film 61 to move towards the top of the product 5, so that the first part of the film 61 covers the top surface 51 of the product 5, and the first part of the film 61 at the guide rod 23 is cut off through the cutting member. This kind of tectorial membrane device can be more accurate, convenient locate 5 tops of product with first part film 61 lid, and guarantee the flagging clout of first part film 61 towards 5 circumference outsides of product. It is conceivable that the distance between the film clamping member 22 and the guide bar 23 is the length of the first partial film 61 covering the top surface 51 of the product 5 after the film clamping member 22 slidably pulls out the first partial film 61 along the carriage 21. Specifically, the lengths of the margins of the first partial film 61 extending toward the four circumferential sides of the product 5 may each be 200 mm.

Referring to fig. 1, in one embodiment, the film enclosing device includes a film enclosing stand 31, a first film enclosing member 32 and a second film enclosing member 33. The film enclosing stand 31 has an opening 34, through which opening 34 the conveyor 1 can convey the products 5. The first and second

film enclosing members

32 and 33 are provided on both sides of the opening 34, respectively, and are movable in opposite directions. The middle part of the second partial film 62 abuts against the opening 34, when the product 5 passes through the opening 34, the front surface 53 of the product 5 abuts against the middle part of the second partial film 62, the front surface 53, the left surface 55 and the right surface 56 of the product 5 are wrapped by the second partial film 62 along with the driving of the conveying device 1, and when the rear surface 54 of the product 5 passes through the opening 34, the first film enclosing piece 32 and the second film enclosing piece 33 move oppositely to press the second partial film 62 on the rear surface 54 of the product 5, cut off the second partial film 62 and then welded. The operation that this kind of structure encloses second partial film 62 to locate product 5 circumference outside is more convenient, and product 5 only need move under conveyer 1's conveying, just can make second partial film 62 cladding to product 5 circumference outside on, and first enclosing membrane piece 32 and second enclosing membrane piece 33 cooperation that can be fine compress tightly and fuse the both ends of second partial film 62, form the cladding to the whole circumference outside of product 5. In practice, the lengths of the remnants of the second portion of film 62 protruding above the top and bottom of the product 5 may be 100mm each.

In an embodiment, both ends of the second partial film 62 are disposed in a roll, the two ends of the second partial film 62 are respectively located at both sides of the opening 34, and the middle portions of both ends of the second partial film 62 abut against the opening 34. The specific discharge arrangement of the second partial film 62 is two types: one is to discharge the two end coils of the second part of film 62 horizontally, and to place the two end coils of the second part of film 62 vertically, and to set a positioning element for winding the second part of film 62 vertically; the other is, the film enclosing device further includes a first material transferring rod 35 and a second material transferring rod 36, the first material transferring rod 35 and the second material transferring rod 36 are respectively located at two sides of the opening 34, the coiled materials at two ends of the second part of the film 62 are discharged in the vertical direction, and are pressed and converted into discharged materials in the horizontal direction through the first material transferring rod 35 and the second material transferring rod 36, and the first material transferring rod 35 and the second material transferring rod 36 can be specifically arranged in an inclined manner of 45 degrees.

In one embodiment, the heat shrinking device 4 is a frame structure, and the product 5 vertically or horizontally passes through the heat shrinking device 4, so that the first portion of film 61 and the second portion of film 62 are heat shrunk.

In order to heat the first part film 61 and the second part film 62 on the product 5 more quickly and conveniently, the first part film 61 and the second part film 62 are shrunk to be attached to the product 5.

Referring to fig. 3, in one embodiment, the heat shrinking device 4 includes a first heating frame 41, a second heating frame 42 and a rotating device 43. The first heating frame 41 and the second heating frame 42 are disposed on the transfer device 1 at an interval, and the rotating device 43 is disposed between the first heating frame 41 and the second heating frame 42. The product 5 is conveyed by the conveyor 1 through the first heating frame 41, and the first heating frame 41 heats the first portion 61 and the second portion 62 of the film on the top surface 51, the left surface 55 and the right surface 56 of the product 5, the product 5 is conveyed by the conveyor 1 onto the rotating device 43, and the rotating device 43 drives the product 5 to rotate 90 ° clockwise or counterclockwise, and the second heating frame 42 heats the second portion 62 of the film on the bottom surface 52, the front surface 53 and the rear surface 54 of the product 5 under the conveyance of the conveyor 1 through the second heating frame 42.

Referring to fig. 4, in another embodiment, the transmission device 1 includes a first transmission section 13 and a second transmission section 14 connected to each other, and a transmission direction of the first transmission section 13 is perpendicular to a transmission direction of the second transmission section 14. The heat shrinking device 4 comprises a third heating frame 44 and a fourth heating frame 45, the third heating frame 44 is arranged on the first conveying section 13, the fourth heating frame 45 is arranged on the second conveying section 14, the first conveying section 13 conveys the product 5 to pass through the third heating frame 44, the first part of the film 61 and the second part of the film 62 on the top surface 51, the left surface 55 and the right surface 56 of the product 5 are heated through the third heating frame 44, the product 5 is conveyed to the second conveying section 14 from the first conveying section 13 and forms a 90-degree turning direction, the product 5 is conveyed to pass through the fourth heating frame 45 from the second conveying section 14, and the fourth heating frame 45 heats the second part of the film 62 on the bottom surface 52, the front surface 53 and the rear surface 54 of the product 5.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A visual packaging apparatus for applying a transparent shrink film to a product, said shrink film including a first portion of film and a second portion of film, comprising:

the conveying device is used for conveying the products to each station;

2. A visual packaging apparatus as claimed in claim 1, wherein said conveying device includes a frame, a roller set and a transmission member, said roller set is rotatably disposed on said frame, said product is disposed on said roller set, said transmission member is disposed on said frame, and said transmission member is capable of driving said roller set to rotatably drive said product to each station.

3. The visual packaging equipment of claim 2, wherein the transmission part comprises a motor, a driving wheel, a driven wheel, a first transmission belt and a second transmission belt, the motor is arranged on the rack, the driving wheel is linked with the output end of the motor, the driven wheel is arranged on one roller shaft of the roller shaft group, two opposite ends of the first transmission belt are respectively sleeved on the driving wheel and the driven wheel, the second transmission belt is sleeved on all roller shafts of the roller shaft group, and the motor drives one roller shaft of the roller shaft group to rotate so as to drive other roller shafts of the roller shaft group to rotate.

4. The visual packaging device according to claim 1, wherein the film covering device comprises a carriage, a film clamping member, a guide rod and a cutting member, the first portion of the film is disposed in a roll, the carriage extends above the conveying device, the film clamping member is slidably disposed on the carriage, the guide rod is disposed on the carriage, an end of the first portion of the film is wound on the guide rod and connected with the film clamping member, the cutting member is disposed near the guide rod, the film clamping member slidably pulls out the first portion of the film along the carriage, and the carriage can drive the pulled out first portion of the film to move towards the top of the product, so that the first portion of the film covers the top of the product, and the cutting member cuts the first portion of the film at the guide rod.

5. A visual packaging apparatus according to claim 1, wherein said film enclosing device comprises a film enclosing stand, a first film enclosing member and a second film enclosing member, said product has a first face, a second face and other faces between said first face and said second face along the circumferential direction, said film enclosing stand has an opening, said conveying device can convey said product through said opening, said first film enclosing member and said second film enclosing member are respectively disposed on two sides of said opening and can move towards each other, the middle portion of said second partial film abuts against said opening, when said product passes through said opening, said first face abuts against the middle portion of said second partial film, said first face and said other faces are wrapped by said second partial film in response to the driving of said conveying device, when said second face passes through said opening, the first film surrounding piece and the second film surrounding piece move oppositely to press the second part of the film on the second surface, and the second part of the film is cut off and then is welded.

6. A visual packaging apparatus according to claim 5, wherein the two ends of the second portion of film are arranged in rolls, the two rolls of the second portion of film are respectively located at two sides of the opening, and the middle portions of the two ends of the second portion of film abut against the opening.

7. A visual packaging apparatus as claimed in claim 6, including one of the following features:

the coil materials at two ends of the second part of the film are discharged in the horizontal direction;

the film enclosing device further comprises a first material transferring rod and a second material transferring rod, the first material transferring rod and the second material transferring rod are located on two sides of the opening respectively, material rolling at two ends of the second part of the film is discharged in the vertical direction, and the material is pressed and converted into horizontal direction discharging through the first material transferring rod and the second material transferring rod respectively.

8. A visual packaging apparatus as claimed in claim 1, wherein said heat shrinking device is a frame structure, and said product is passed vertically or horizontally through said heat shrinking device to heat shrink said first portion of film and said second portion of film.

9. A visual packaging apparatus as claimed in claim 8, wherein said heat shrinking device includes a first heating frame, a second heating frame and a rotating device, the first heating frame and the second heating frame are arranged on the conveying device at intervals, the rotating device is arranged between the first heating frame and the second heating frame, the product is conveyed through the first heating frame by the conveying device, and the first heating frame heats part of the first part of the film and the second part of the film on the product, the products are transferred by the transfer device onto the rotating device, and the rotating device drives the products to rotate by 90 degrees, and passes through the second heating frame under the conveying of the conveying device, and the second heating frame heats the first part of the film and the second part of the film on other parts of the product.

10. A visual packaging apparatus according to claim 8, wherein said conveying means comprises a first conveying section and a second conveying section connected to each other, the conveying direction of the first conveying section is vertical to the conveying direction of the second conveying section, the heating and shrinking device comprises a third heating frame and a fourth heating frame, the third heating frame is arranged on the first conveying section, the fourth heating frame is arranged on the second conveying section, the first conveying section conveys the product to pass through the third heating frame, and heating a part of the first partial film and the second partial film on the product through the third heating frame, wherein the product is conveyed to the second conveying section from the first conveying section, and the product is conveyed by the second conveying section through the fourth heating frame, and the fourth heating frame heats the first part of the film and the second part of the film on the other part of the product.