CN218985789U - Protective film hot melting equipment - Google Patents

Abstract

The utility model discloses a protective film hot melting device, which comprises: the first hot melt equipment, first hot melt equipment includes: hem subassembly and first hot melt subassembly, the hem subassembly includes: the folding knife is used for wrapping the protective film on the side face of the battery cell in the first direction, the first hot melting assembly is arranged above the folding assembly, and the first hot melting assembly is used for hot melting one side of the protective film in the first direction; a second thermal melting apparatus, the second thermal melting apparatus comprising: the second hot-melting assembly is used for hot-melting the side edge of the protective film in the second direction, and the third hot-melting assembly is used for hot-melting the other side of the protective film in the first direction. Therefore, the protection film and the lap edge are firstly wrapped at the first hot melting equipment, and then the side face hot melting is carried out at the second hot melting equipment, so that the step-by-step hot melting of the lap edge and the side face of the battery cell is realized, and the difficulty of debugging and later maintenance of the protection film hot melting equipment is greatly reduced.

Description

Protective film hot melting equipment

Technical Field

The utility model relates to the technical field of protective film hot melting equipment, in particular to protective film hot melting equipment.

Background

The manufacturing process of the lithium ion battery is mainly to carry out coating on the battery core, then to wrap the battery core by the insulating film, to be thermally fused with the side plate and the spacer ring assembly, and finally to weld the electrode lug on the cover plate assembly, thereby playing the roles of fixing the battery core, preventing subsequent shell entering scratch and the like.

In the related art, a mode of heating a resistance wire to perform hot melting of a protective film and a side plate spacer ring is adopted, so that the phenomenon of hot melting wire drawing or melting point falling is easily caused, and the product quality is influenced. And the arrangement of the hot melting stations is unreasonable, and the protection film can be tilted during hot melting, so that the hot melting is invalid and the hot melting efficiency is low.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the protective film hot-melting equipment, which is used for firstly wrapping the protective film and the lap edge at the first hot-melting equipment and then carrying out the side hot-melting at the second hot-melting equipment, so that the lap edge and the side of the battery cell are subjected to the step-by-step hot-melting.

The protective film hot melting equipment according to the embodiment of the utility model comprises: a first thermal melting apparatus, the first thermal melting apparatus comprising: hem subassembly and first hot melt subassembly, the hem subassembly includes: the electric cell comprises a folding knife and a first driving piece, wherein the first driving piece drives the folding knife to move, the folding knife is used for wrapping a protective film on the side surface of the electric cell in a first direction, a first hot melting assembly is arranged above the folding assembly, and the first hot melting assembly is used for hot melting one side of the protective film in the first direction; the second hot melt equipment, the second hot melt equipment with first hot melt equipment interval sets up, the second hot melt equipment includes: the second hot-melt assembly and the third hot-melt assembly are arranged at intervals in the second direction, the second hot-melt assembly is used for hot-melting the side edge of the protective film in the second direction, and the third hot-melt assembly is used for hot-melting the other side of the protective film in the first direction.

According to the protective film hot-melting equipment provided by the embodiment of the utility model, the protective film hot-melting equipment is divided into two parts, the first hot-melting assembly and the flanging assembly are arranged on the first hot-melting equipment, and the second hot-melting assembly and the third hot-melting assembly are arranged on the second hot-melting equipment, so that the protective film and the joint edge are firstly wrapped at the first hot-melting equipment, then the side hot-melting is carried out at the second hot-melting equipment, the step-by-step hot-melting of the joint edge and the side of the battery core is realized, and the difficulties of debugging and later maintenance of the protective film hot-melting equipment are greatly reduced.

According to some embodiments of the utility model, the protective film hot-melt apparatus further includes: the conveying equipment is arranged between the first hot melting equipment and the second hot melting equipment and is used for conveying the battery cell from the first hot melting equipment to the second hot melting equipment.

According to some embodiments of the utility model, the number of the second heat-melting assemblies is four, the number of the third heat-melting assemblies is two, the four second heat-melting assemblies are arranged between the two third heat-melting assemblies, or the two third heat-melting assemblies are arranged between the four second heat-melting assemblies.

According to some embodiments of the present utility model, the number of the folding knife and the number of the first driving parts are two, wherein a first hot melt hole is formed in one of the folding knives, and the first hot melt hole corresponds to the first hot melt assembly; and second hot melt holes are formed in two ends of one folding knife in the third direction, and the second hot melt holes correspond to the first hot melt components.

According to some embodiments of the utility model, the first hot melt holes are a plurality of and are spaced apart in a third direction; and the number of the second hot melt holes is multiple and is arranged at intervals, or one second hot melt hole is arranged.

According to some embodiments of the utility model, the first hotmelt assembly laser assembly and comprises: the first hot melting piece and the second driving piece are in transmission connection, the second driving piece is in transmission connection with the first hot melting piece and drives the first hot melting piece to move in a third direction, and the first hot melting piece is used for hot melting one side of the protective film in the first direction.

According to some embodiments of the utility model, the second hot melt assembly comprises: the second hot-melt piece and adjusting piece, the adjusting piece with second hot-melt piece transmission is connected and is used for adjusting the position of second hot-melt piece in the third direction, the second hot-melt piece is used for right the lateral hot-melt of protection film in the second direction.

According to some embodiments of the utility model, the second thermal melting apparatus further comprises: the first subassembly that compresses tightly, first subassembly that compresses tightly set up in the both sides of electric core in the second direction, first subassembly that compresses tightly includes: the battery cell comprises two first clamping jaws, two first light-transmitting parts and first fixing parts, wherein the two first clamping jaws are respectively arranged on two sides of the battery cell in the second direction and are provided with third hot melting holes, the first light-transmitting parts are clamped between the first clamping jaws and the battery cell, and one end of each first fixing part is fixed with each first clamping jaw, and the other end of each first fixing part is fixed with each first light-transmitting part.

According to some embodiments of the utility model, the third hot melt assembly comprises: the third driving piece is in transmission connection with the third hot melting piece and drives the third hot melting piece to move in a third direction, and the third hot melting piece is used for hot melting the other side of the protective film in the first direction.

According to some embodiments of the utility model, the second thermal melting apparatus further comprises: the second compresses tightly the subassembly, the second compress tightly the subassembly set up in the opposite side of electric core in the first direction, the second compresses tightly the subassembly and includes: the battery cell comprises two second clamping jaws, two second light-transmitting parts and second fixing parts, wherein the two second clamping jaws are respectively arranged on two sides of the battery cell in the first direction and are provided with fourth hot melting holes, the second light-transmitting parts are clamped between the second clamping jaws and the battery cell, and one end of each second fixing part is fixed with each second clamping jaw, and the other end of each second fixing part is fixed with each second light-transmitting part.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a first thermal fusion apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing a partial structure of a first thermal fusion apparatus according to an embodiment of the present utility model;

FIG. 3 is a partial schematic view A of FIG. 2;

FIG. 4 is a schematic structural view of a second thermal melting apparatus according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a second heat staking assembly and a first hold down assembly in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic view of a first compression assembly according to an embodiment of the present utility model;

FIG. 7 is a schematic structural view of a third heat staking assembly and a second hold-down assembly in accordance with an embodiment of the present utility model;

fig. 8 is a schematic structural view of a second compression assembly according to an embodiment of the present utility model.

Reference numerals:

10. a hemming assembly; 11. a folding knife; 12. a first driving member; 13. a first hot melt hole; 14. a second hot melt hole;

20. a first hot melt assembly; 21. A first hot melt member; 22. A second driving member;

30. a second hot melt assembly; 31. A second hot melt member; 32. A third driving member;

40. a first compression assembly; 41. a first jaw; 42. a first light-transmitting member; 43. a first fixing member; 44. a third hot melt hole;

50. a third hot melt assembly; 51. a third heat-fusible member; 52. a third driving member;

60. a second hold-down assembly; 61. a second jaw; 62. a second light-transmitting member; 63. a second fixing member; 64. a fourth hot melt hole;

200. a battery cell; 300. a transfer device.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

A protective film hot-melt apparatus according to an embodiment of the present utility model is described below with reference to fig. 1 to 8.

Referring to fig. 1 to 8, a protective film hot-melt apparatus according to an embodiment of the present utility model includes: a first thermal melting device and a second thermal melting device. The second hot melting equipment and the first hot melting equipment are arranged at intervals, that is to say, the protective film hot melting equipment provided by the embodiment of the utility model is divided into two hot melting steps, namely, the protective film hot melting equipment is divided into two parts which are respectively arranged on the coating platform and the conveying line platform, so that the difficulty of debugging and later maintenance of the protective film hot melting equipment is greatly reduced.

Wherein the first thermal melting apparatus includes: the hem assembly 10 and the first hot melt assembly 20, the hem assembly 10 includes: the folding knife 11 and the first driving piece 12, the first driving piece 12 drives the folding knife 11 to move, the folding knife 11 is used for wrapping the protection film on the side of the battery cell 200 in the first direction, the first hot melting assembly 20 is arranged above the folding assembly 10, the first hot melting assembly 20 is used for hot melting one side of the protection film in the first direction, and the second hot melting equipment comprises: the second heat-melting assembly 30 and the third heat-melting assembly 50 are arranged at intervals in the second direction, the second heat-melting assembly 30 is used for heat-melting the side edge of the protective film in the second direction, and the third heat-melting assembly 50 is used for heat-melting the other side of the protective film in the first direction. That is, the hot-melt platform on the side surface of the battery cell 200 and the hot-melt platform on the bottom surface of the battery cell 200 are placed on the coated conveying device 300, that is, the second hot-melt assembly 30 and the third hot-melt assembly 50 are placed on the second hot-melt device, so that the protection film and the lap joint are firstly coated on the first hot-melt device, and then the side surface hot-melt is performed on the second hot-melt device, and the step-by-step hot-melt of the lap joint and the side surface of the battery cell 200 is realized.

Therefore, the protective film hot-melt equipment is divided into two parts, the first hot-melt assembly 20 and the flanging assembly 10 are placed on the first hot-melt equipment, and the second hot-melt assembly 30 and the third hot-melt assembly 50 are placed on the second hot-melt equipment, so that the protective film and the lap joint are firstly wrapped at the first hot-melt equipment, then the side hot-melt is carried out at the second hot-melt equipment, the step hot-melt of the lap joint and the side of the battery cell 200 is realized, and the difficulty of debugging and later maintenance of the protective film hot-melt equipment is greatly reduced.

Wherein, protection film hot melt equipment still includes: the conveying device 300, the conveying device 300 is arranged between the first hot melting device and the second hot melting device, and the conveying device 300 is used for conveying the battery cell 200 from the first hot melting device to the second hot melting device. That is, the transfer device 300 is provided between the first and second hot-melt devices, and the battery cell 200 can be transferred from the first hot-melt device to the second hot-melt device by the transfer device 300, so that hot-melt of the lap, side, and bottom surfaces of the battery cell 200 can be achieved.

And, referring to fig. 4, the number of the second heat-fusing assemblies 30 may be four, the number of the third heat-fusing assemblies 50 may be two, the four second heat-fusing assemblies 30 may be disposed between the two third heat-fusing assemblies 50, or the two third heat-fusing assemblies 50 may be disposed between the four second heat-fusing assemblies 30. That is, the second heat-melting device has 4 clamping jaw mechanisms, and is divided into four stations in the second direction, wherein one station is a side heat-melting station, the other station is a bottom heat-melting station, after the battery cell 200 reaches the heat-melting station, the first clamp and the second clamp the battery cell 200, the first station carries out side heat-melting of the battery cell 200, the second station carries out bottom heat-melting of the battery cell 200, after the heat-melting is completed, the battery cell 200 is put back into the conveying device 300 from the clamping jaw, the two stations are moved backwards, the battery cell 200 reaches the third station from the original first station, the third clamp clamps the bottom heat-melting, the second station reaches the fourth station in place, and the fourth clamp clamps clamp the side heat-melting, so that the cross heat-melting of the side and the bottom of the double-station battery cell 200 is realized. The cells 200 are then flowed to subsequent stations by the transfer apparatus 300. The number of the second heat-melting assemblies 30 for the side heat-melting is two, that is, the number of the second heat-melting assemblies 30 at one four two heat-melting stations is two, so that the side of the battery cell 200 can be subjected to omnibearing heat-melting.

And, referring to fig. 2 and 3, the number of the folding knives 11 and the number of the first driving parts 12 are two, wherein a first hot melt hole 13 is arranged on one folding knife 11, and the first hot melt hole 13 corresponds to the first hot melt assembly 20; and, one of the folding knives 11 is provided with second heat-fusible holes 14 at both ends in the third direction, the second heat-fusible holes 14 corresponding to the first heat-fusible members 20. Specifically, the number of the folding knives 11 is two, and the number of the first driving members 12 is also two. Wherein, the folding knife 11 is zigzag, and two folding knives 11 are mutually staggered and matched, carry out complete overlap joint with the overlap edge through zigzag staggering, realize the complete overlap joint of insulating film through the cooperation of two folding knives 11, guaranteed the reliability of insulating film overlap joint before the hot melt.

Referring to fig. 3, a first hot-melting hole 13 is formed in one of the folding knives 11, the first hot-melting assembly 20 emits laser, the laser can pass through the first hot-melting hole 13 to perform hot-melting on the joint edge region at an accurate position, the laser hot-melting efficiency is high, the laser hot-melting speed is high, the stability is good, and the product quality of the next process is guaranteed.

And, referring to fig. 3, one of the folding knives 11 is provided with second heat-fusible holes 14 at both ends in the third direction, the second heat-fusible holes 14 corresponding to the first heat-fusible members 20. Specifically, in the third direction, that is, in the axial direction of the battery cell 200, two ends of one folding knife 11 in the third direction are further provided with second hot-melt holes 14, the second hot-melt holes 14 correspond to the first hot-melt assemblies 20, and the second hot-melt holes 14 are located at two ends of the lap joint edge, so that the first hot-melt assemblies 20 perform laser hot-melt on two ends of the protective film in the third direction, and the protective film is ensured to be integrally attached to the battery cell 200.

Further, referring to fig. 3, the number of the first heat-melting holes 13 may be plural, and are arranged at intervals in the third direction, specifically, the folding knife 11 is provided with the plurality of first heat-melting holes 13, and in the third direction, the plurality of first heat-melting holes 13 are arranged at intervals on the folding knife 11, so that the laser emitted by the first heat-melting assembly 20 can completely cover the overlapping edge, so that the heat-melting of the overlapping edge is more comprehensive, and the stability of the protective film of the battery cell 200 is ensured.

And, the second heat fusion holes 14 may be plural and provided at intervals in the second direction. Of course, the second heat stake hole 14 may be one.

As shown in fig. 5, the first thermal melting assembly 20 may be a laser assembly and include: the first hot-melt piece 21 and the second driving piece 22, the second driving piece 22 and the first hot-melt piece 21 are connected in a transmission way and drive the first hot-melt piece 21 to move in the third direction, and the first hot-melt piece 21 is used for hot-melting one side of the protective film in the first direction. Specifically, the first hot-melting assembly 20 includes a first hot-melting element 21 and a second driving element 22, the first hot-melting element 21 is located above the hemming assembly 10, and the first hot-melting element 21 can emit a light beam with a specific wavelength and high power as a heat source to perform laser hot-melting on the lap edges. The second driving piece 22 is connected with the first hot-melt piece 21 in a transmission way, the second driving piece 22 can drive the first hot-melt piece 21 to move in the third direction, the first hot-melt piece 21 emits laser, and therefore the first hot-melt piece 21 can carry out laser hot-melt on the lap joint edge along the third direction, the efficiency is high, the speed is high, the stability is good, and the product quality of the next procedure is guaranteed.

Wherein, referring to fig. 2, the second hot melt assembly 30 includes: the second hot-melt piece 31 and the regulating piece 32, regulating piece 32 and second hot-melt piece 31 transmission are connected and are used for adjusting the position of second hot-melt piece 31 in the third direction, and second hot-melt piece 31 is used for the side hot-melt of protection film in the second direction. Specifically, the second heat-melting assembly 30 includes a second heat-melting element 31 and an adjusting element 32, the second heat-melting element 31 is located at two sides of the battery cell 200 in the second direction, and the second heat-melting element 31 can emit a light beam with a specific wavelength and high power as a heat source to perform laser heat-melting on the lap joint edge. The adjusting piece 32 is connected with the second hot-melt piece 31 in a transmission way, the adjusting piece 32 can adjust the position of the second hot-melt piece 31 in the third direction, the second hot-melt piece 31 emits laser, and therefore the second hot-melt piece 31 can carry out laser hot-melt on the side face along the third direction, the efficiency is high, the speed is high, the stability is good, and the product quality of the next procedure is guaranteed.

Referring to fig. 6, the second thermal fusing apparatus further includes: the first compressing assembly 40, the first compressing assembly 40 is disposed on two sides of the battery cell 200 in the second direction, and the first compressing assembly 40 includes: the two first clamping jaws 41, the two first light-transmitting members 42 and the first fixing members 43, the two first clamping jaws 41 are respectively arranged on two sides of the battery cell 200 in the second direction and are provided with third hot melting holes 44, the first light-transmitting members 42 are clamped between the first clamping jaws 41 and the battery cell 200, one end of each first fixing member 43 is fixed with the corresponding first clamping jaw 41, and the other end of each first fixing member 43 is fixed with the corresponding first light-transmitting member 42. Specifically, the two first clamping jaws 41 are respectively clamped on both sides of the second direction of the battery cell 200, thereby pressing the side surfaces of the battery cell 200.

And still be provided with first transparent piece between first clamping jaw 41 and the electric core 200, first transparent piece can with electric core 200 butt to guaranteed that electric core 200 carries out the hot melt under the state of fully compressing tightly, thereby can not appear that the protection film perk is not tight and lead to the condition emergence that the hot melt is failed and the hot melt effect is not good.

And, both ends of the first fixing member 43 may be fixed with the first clamping jaw 41 and the first transparent member, respectively, so that the first transparent member may be fixed on the first clamping jaw 41.

Further, a third heat-fusible hole 44 is provided in the first holding jaw 41, so that the laser light emitted from the second heat-fusible member 31 can be irradiated on the protective film through the third heat-fusible hole 44 and the first transparent member.

Referring to fig. 7, the third fuse assembly 50 includes: the third hot-melt member 51 and the third driving member 52, the third driving member 52 and the third hot-melt member 51 are in transmission connection and drive the third hot-melt member 51 to move in the third direction, and the third hot-melt member 51 is used for hot-melting the other side of the protective film in the first direction. Specifically, the third heat-melting assembly 50 includes a third heat-melting element 51 and a third driving element 52, the third heat-melting element 51 is located at the other side of the battery cell 200 in the first direction, and the third heat-melting element 51 can emit a light beam with a specific wavelength and high power as a heat source to perform laser heat-melting on the lap joint edge. The third driving piece 52 is in transmission connection with the third hot melting piece 51, the third driving piece 52 can drive the third hot melting piece 51 to move in the third direction, the third hot melting piece 51 emits laser, and therefore the third hot melting piece 51 can carry out laser hot melting on the bottom surface along the third direction, the efficiency is high, the speed is high, the stability is good, and the product quality of the next procedure is guaranteed.

Referring to fig. 8, the second thermal fusing apparatus further includes: the second compressing assembly 60, the second compressing assembly 60 is disposed on the other side of the battery cell 200 in the first direction, and the second compressing assembly 60 includes: the two second clamping jaws 61, the two second light-transmitting pieces 62 and the second fixing piece 63, the two second clamping jaws 61 are respectively arranged on two sides of the battery cell 200 in the first direction, the second clamping jaws 61 are provided with fourth hot melt holes 64, the second light-transmitting piece 62 is clamped between the second clamping jaws 61 and the battery cell 200, one end of the second fixing piece 63 is fixed with the second clamping jaws 61, and the other end of the second fixing piece 63 is fixed with the second light-transmitting piece 62. Specifically, two second clamping jaws 61 are respectively clamped on both sides of the first direction of the battery cell 200, thereby pressing the upper and lower surfaces of the battery cell 200.

And still be provided with the second transparent piece between second clamping jaw 61 and the electric core 200, the second transparent piece can with electric core 200 butt to guaranteed that electric core 200 carries out the hot melt under the state of fully compressing tightly, thereby can not appear that the protection film perk is not tight and lead to the condition emergence that the hot melt is failed and the hot melt effect is not good.

And, both ends of the second fixing member 63 may be fixed with the second jaw 61 and the second transparent member, respectively, so that the first transparent member may be fixed on the second jaw 61.

Further, a fourth thermohole 64 is provided on the second jaw 61 so that laser light emitted from the third thermoelement 51 can be irradiated on the protective film through the fourth thermohole 64 and the second transparent element.

Wherein, the first transparent piece and the second transparent piece are both zinc selenide glass. The zinc selenide glass has extremely low absorption coefficient in a 1064nm wave band (the CO2 laser output laser wave band), and has good imaging characteristics and thermal shock characteristics. And the anti-reflection film AR10.6 plated on the surface of the zinc selenide glass can further increase the light transmittance of CO2 laser, can enable the light transmittance of the CO2 laser to reach 98.5%, and can improve the performances of wear resistance, oxidation resistance and the like of the zinc selenide glass.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A protective film hot-melt apparatus, characterized by comprising:

a first thermal melting apparatus, the first thermal melting apparatus comprising: a hemming assembly (10) and a first hot melt assembly (20), the hemming assembly (10) comprising: the electric cell comprises a folding knife (11) and a first driving piece (12), wherein the first driving piece (12) drives the folding knife (11) to move, the folding knife (11) is used for wrapping a protective film on the side surface of the electric cell (200) in a first direction, the first hot melting assembly (20) is arranged above the folding assembly (10), and the first hot melting assembly (20) is used for hot melting one side of the protective film in the first direction;

the second hot melt equipment, the second hot melt equipment with first hot melt equipment interval sets up, the second hot melt equipment includes: the second hot melting assembly (30) and the third hot melting assembly (50), the second hot melting assembly (30) and the third hot melting assembly (50) are arranged at intervals in the second direction, the second hot melting assembly (30) is used for hot melting the side edge of the protective film in the second direction, and the third hot melting assembly (50) is used for hot melting the other side of the protective film in the first direction.

2. The protective film hot-melt apparatus according to claim 1, characterized by further comprising: the conveying equipment is arranged between the first hot melting equipment and the second hot melting equipment and is used for conveying the battery cell (200) from the first hot melting equipment to the second hot melting equipment.

3. The protective film heat-sealing apparatus according to claim 1, wherein the number of the second heat-sealing assemblies (30) is four, the number of the third heat-sealing assemblies (50) is two, the four second heat-sealing assemblies (30) are disposed between the two third heat-sealing assemblies (50), or the two third heat-sealing assemblies (50) are disposed between the four second heat-sealing assemblies (30).

4. The protective film hot-melting apparatus according to claim 1, wherein the number of the folding knife (11) and the number of the first driving members (12) are two, wherein a first hot-melting hole (13) is formed in one of the folding knives (11), and the first hot-melting hole (13) corresponds to the first hot-melting assembly (20); the method comprises the steps of,

and second hot melting holes (14) are formed in two ends of one folding knife (11) in the third direction, and the second hot melting holes (14) correspond to the first hot melting assemblies (20).

5. The protective film heat fusion apparatus according to claim 4, wherein the first heat fusion holes (13) are plural and arranged at intervals in a third direction; the method comprises the steps of,

the number of the second hot melt holes (14) is multiple and the second hot melt holes are arranged at intervals, or one second hot melt hole (14) is arranged.

6. The protective film hot-melt apparatus according to claim 1, wherein the first hot-melt assembly (20) is a laser assembly and comprises: the protective film comprises a first hot-melt piece (21) and a second driving piece (22), wherein the second driving piece (22) is in transmission connection with the first hot-melt piece (21) and drives the first hot-melt piece (21) to move in a third direction, and the first hot-melt piece (21) is used for hot-melting one side of the protective film in the first direction.

7. The protective film hot-melt apparatus according to claim 1, wherein the second hot-melt assembly (30) includes: the device comprises a second hot-melt piece (31) and an adjusting piece (32), wherein the adjusting piece (32) is in transmission connection with the second hot-melt piece (31) and is used for adjusting the position of the second hot-melt piece (31) in a third direction, and the second hot-melt piece (31) is used for hot-melting the side edge of the protective film in the second direction.

8. The protective film heat fusion apparatus according to claim 7, wherein the second heat fusion apparatus further comprises: first compression assembly (40), first compression assembly (40) set up in electric core (200) are in the both sides of second direction, first compression assembly (40) include: two first clamping jaw (41), two first printing opacity spare (42) and first mounting (43), two first clamping jaw (41) set up respectively electric core (200) are in the both sides of second direction and are provided with third hot melt hole (44), first printing opacity spare (42) press from both sides and establish first clamping jaw (41) with between electric core (200), the one end of first mounting (43) with first clamping jaw (41) is fixed and the other end with first printing opacity spare (42) are fixed.

9. The protective film hot-melt apparatus according to claim 1, wherein the third hot-melt assembly (50) includes: the third hot-melt piece (51) and the third driving piece (52), the third driving piece (52) is in transmission connection with the third hot-melt piece (51) and drives the third hot-melt piece (51) to move in a third direction, and the third hot-melt piece (51) is used for hot-melting the other side of the protective film in the first direction.

10. The protective film heat fusion apparatus according to claim 9, wherein the second heat fusion apparatus further comprises: a second compression assembly (60), the second compression assembly (60) being disposed on the other side of the cell (200) in the first direction, the second compression assembly (60) comprising: two second clamping jaw (61), two second printing opacity spare (62) and second mounting (63), two second clamping jaw (61) set up respectively electric core (200) are in the both sides of first direction and are provided with fourth hot melt hole (64), second printing opacity spare (62) press from both sides and establish second clamping jaw (61) with between electric core (200), the one end of second mounting (63) with second clamping jaw (61) is fixed and the other end with second printing opacity spare (62) are fixed.

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