阅读说明：本技术 高速四边封双列自封拉链袋装置 (High-speed four-edge sealing double-row self-sealing zipper bag device ) 是由 蔡雄 袁国森 詹伟健 于 2021-07-27 设计创作，主要内容包括：本发明涉及包装袋加工设备技术领域,具体涉及一种高速四边封双列自封拉链袋装置,包括安装架,所述安装架设有两个上下对称分布的绕辊,两个所述绕辊上分别套置有制袋薄膜,所述安装架上并位于两个绕辊之间安装有供自封拉链移动的导料槽。本发明通过在两片制袋薄膜之间设置分开的自封拉链,并分别在导料槽内将自封拉链的上拉链条和下拉链条分别通过U型加热板热贴合在两片制袋薄膜的对应端面上,避免将整个自封拉链直接热封在制袋薄膜上,同时通过固定架内的两个滚轮在夹带着自封拉链的制袋薄膜的上部进行滑动碾压,使自封拉链和制袋薄膜贴合的更加紧密,并抵触加热环对自封拉链和制袋薄膜的边缘处进行热封,提高紧固效果。(The invention relates to the technical field of packaging bag processing equipment, in particular to a high-speed four-edge sealing double-row self-sealing zipper bag device which comprises a mounting frame, wherein the mounting frame is provided with two winding rollers which are distributed up and down symmetrically, bag making films are sleeved on the two winding rollers respectively, and a guide chute for moving a self-sealing zipper is arranged on the mounting frame and between the two winding rollers. According to the invention, the separated self-sealing zipper is arranged between the two bag-making films, the upper zipper strip and the lower zipper strip of the self-sealing zipper are respectively thermally bonded on the corresponding end surfaces of the two bag-making films in the material guide grooves through the U-shaped heating plates, so that the whole self-sealing zipper is prevented from being directly thermally sealed on the bag-making films, and meanwhile, the self-sealing zipper and the bag-making films are more tightly bonded through the sliding rolling of the two rollers in the fixing frame on the upper parts of the bag-making films carrying the self-sealing zipper, and the heating rings are abutted to thermally seal the edges of the self-sealing zipper and the bag-making films, so that the fastening effect is improved.)

1. A high-speed four-edge sealing double-row self-sealing zipper bag device is characterized by comprising a mounting rack (1), wherein the mounting rack (1) is provided with two winding rollers (101) which are symmetrically distributed up and down, bag-making films (1011) are respectively sleeved on the two winding rollers (101), a material guide groove (1021) for the self-sealing zipper (102) to move is arranged on the mounting rack (1) and positioned between the two winding rollers (101), the self-sealing zipper (102) is divided into an upper zipper strip (1022) and a lower zipper (1023) which are matched with each other, the upper zipper strip (1022) and the lower zipper (1023) respectively move towards one side of the joint of the two bag-making films (1011) and can be respectively thermally attached to the end faces of the two bag-making films (1011), a roller (103) which can roll on the bag-making films (1011) and can press the self-sealing zipper (102) and the bag-making films (1011) is arranged on the mounting rack (1) and above the bag-making films (1011) at the top, the mounting rack (1) is provided with a heating ring (104) which can move towards one side of the bag making film (1011) and can carry out secondary heat sealing on the joint of the bag making film (1011) and the self-sealing zipper (102).

2. The high-speed four-edge sealing two-row self-sealing zipper bag device according to claim 1, wherein the two guiding chutes (1021) are provided with upward openings, the zipper strip (1022) and the pull-down chain (1023) slide in the two guiding chutes (1021), respectively, and the contact surface of the guiding chute (1021) and the molded self-sealing zipper (102) is made of PI plastic with high heat resistance.

3. The high-speed four-edge sealing and two-row self-sealing zipper bag device according to claim 1, wherein two rotating rollers (105) capable of abutting against the end faces of the zipper strips (1022) and the pull-down chains (1023) towards one side of the opening of the material guiding groove (1021) are installed on the installation frame (1), the two rotating rollers (105) are arranged in parallel, one end of each rotating roller (105) is connected with a motor (1051) installed at the upper end of the installation frame (1) through a transmission mechanism, and the rotating rollers (105) are made of rubber materials with large friction force with the end faces of the self-sealing zippers (102).

4. The high-speed four-edge sealing two-row self-sealing zipper bag device according to claim 1, wherein a U-shaped heating plate (106) is arranged on the mounting frame (1) at the outlet of the material guiding grooves (1021), the concave surface of the U-shaped heating plate (106) faces to one side of the two material guiding grooves (1021), and the upper end and the lower end of the U-shaped heating plate (106) are respectively suspended on the upper part of the zipper strip (1022) and the lower part of the pull-down chain (1023) in parallel.

5. The high-speed four-edge sealing and two-row self-sealing zipper bag device according to claim 1, wherein a fixing frame (107) is installed at one end of the mounting frame (1) far away from the two winding rollers (101), the fixing frame (107) is arranged above the bag making film (1011) at the top, a rolling plate (1071) for rolling the roller (103) is arranged right above the bonding position of the bag making film (1011) and the self-sealing zipper (102) on the fixing frame (107), and a strip-shaped groove (10711) for the bottom end of the roller (103) to pass through is arranged in the middle of the rolling plate (1071) in a penetrating manner.

6. A high-speed four-edge sealing two-row self-sealing zipper bag device according to claim 1, wherein there are two rollers (103), and the two rollers (103) are hinged on a lifting arm (1032) which can be lifted through two connecting arms (1031), and the lifting arm (1032) is driven by a lifting cylinder (1033) installed at the top end of the fixing frame (107).

7. The high-speed four-edge-sealing two-row self-sealing zipper bag device according to claim 6, wherein the connecting arm (1031) is composed of a straight rod (10311) hinged on the lifting arm (1032) and an inverted L-shaped arm support (10312) vertically arranged on the end surface of the straight rod (10311), and the roller (103) is rotatably arranged between the straight rod (10311) and the inverted L-shaped arm support (10312).

8. The high-speed four-edge-sealing two-row self-sealing zipper bag device according to claim 5, wherein the rolling plate (1071) is provided with a leaf spring (10712) at both ends in the length direction of the strip groove (10711) for matching with both end faces of the connecting arm (1031), one end of the leaf spring (10712) is screwed on the rolling plate (1071), and the other end of the leaf spring (10712) extends towards one side of the bag making film (1011) at an inclined angle and is connected with the heating ring (104).

9. The high-speed four-edge-sealing two-row self-sealing zipper bag apparatus according to claim 8, wherein the leaf spring (10712) is provided with two and symmetrically distributed on both sides of the width direction of the strip groove (10711), and the inclination angle of the leaf spring (10712) and the roll plate (1071) is 15 °.

10. The high-speed four-edge sealing two-row self-sealing zipper bag device according to claim 1, wherein the heating rings (104) are of a U-shaped structure and are symmetrically distributed in two numbers, two ends of the U-shaped opening direction of the heating rings (104) are respectively and tightly mounted at the lower parts of two leaf springs (10712) through screws, the heating rings (104) are arranged in parallel with the rolling plate (1071) and the bag making film (1011), the distance between the two heating rings (104) is the same as the length of the self-sealing zipper (102), and the width of the heating rings (104) is matched with the width of the self-sealing zipper (102).

Technical Field

The invention relates to the technical field of packaging bag processing equipment, in particular to a high-speed four-edge sealing double-row self-sealing zipper bag device.

Background

Four sides are sealed, namely the packaging form that four sides all pass through the heat-seal after the bag becomes, present common granule packaging form, the technology is mature, simple process, use a whole membrane equant half relative package of halving usually, belong to the mode of carrying out single bag cutting after whole heat-seal bag making earlier, only need control one side to align and can obtain better packing effect during production, consequently, have high package material/equipment adaptability and packing operating stability, simultaneously, because every side all passes through even heat-seal, the product leakproofness after the bag becomes is better.

While the prior four-edge sealing bag is used, a self-sealing zipper is usually sealed in the bag according to different use environments and the convenience of the bag is improved, but the four-edge sealing bag is firstly made and then cut during bag making, and the zipper is subjected to secondary operation at the sealing position in the bag after the four-edge sealing bag is cut during assembly, so that the processing cost is high, the integral processing speed of the four-edge sealing bag is influenced, some four-edge sealing bags are directly placed between two bag making films during processing for improving the efficiency, the self-sealing zipper cannot be well clamped in the transmission process of the bag making films, the condition of the zipper occurs during processing, meanwhile, the heat sealing of the bag making films and the self-sealing zipper in the prior art is limited to simple heat sealing, so that some edges cannot be well fixed during heat sealing, and more unqualified and defective products are caused, therefore, the value of modern automatic processing production cannot be well reflected.

In connection with the problems set forth above, the reasons are summarized as follows:

1. in the relative packaging process of four sides bag-sealing to two bag-making films in the prior art, the self-sealing zipper after fitting can be directly placed between the bag-making films, the bag-making films and the self-sealing zipper are subjected to heat sealing and fixing when the bag-making films are subjected to heat sealing, the self-sealing zipper is put between the bag-making films and a heat sealing station, the self-sealing zipper and the bag-making films are poor in fixity, the original position can not be well kept for heat sealing, and the self-sealing zipper after processing is inclined to influence the use.

2. In the heat-sealing process of the bag-making film and the self-sealing zipper, the self-sealing zipper cannot be well heat-sealed on the bag-making film, and the heat-sealing effect is poor.

Therefore, a high-speed four-edge sealing two-row self-sealing zipper bag device is provided to solve the problems.

Disclosure of Invention

Solves the technical problem

In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-speed four-edge-sealed two-row self-sealing zipper bag device, which can effectively solve the problems of the prior art.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the invention provides a high-speed four-edge sealing double-row self-sealing zipper bag device, which comprises a mounting frame, wherein the mounting frame is provided with two winding rollers which are symmetrically distributed up and down, bag-making films are respectively sleeved on the two winding rollers, a material guide groove for the self-sealing zipper to move is arranged on the mounting rack and between the two winding rollers, the self-sealing zipper is divided into an upper zipper strip and a lower pull chain which are matched with each other, the upper zipper strip and the lower zipper strip respectively move towards one side of the joint of the two bag-making films and can be respectively thermally attached to the end surfaces of the two bag-making films, a roller which can roll on the bag making film and can compact the self-sealing zipper and the bag making film is arranged on the mounting rack and above the bag making film at the top, the mounting frame is provided with a heating ring which can move towards one side of the bag making film and can carry out secondary heat sealing on the joint of the bag making film and the self-sealing zipper.

Furthermore, the guide chutes are provided with two guide chutes, the openings of the two guide chutes face upwards, the upper zipper strip and the lower zipper strip slide in the two guide chutes respectively, and the contact surfaces of the guide chutes and the molded self-sealing zipper are made of high heat-resistant PI plastic materials.

Further, install two can contradict at last draw zipper strip and pull-down chain towards the live-rollers of baffle box opening side end face on the mounting bracket, two live-rollers parallel arrangement and the one end of this live-rollers link to each other with the motor of installing in the mounting bracket upper end through drive mechanism respectively, the live-rollers be with proclaim oneself the great rubber material of zip fastener terminal surface frictional force.

Furthermore, a U-shaped heating plate is arranged on the mounting frame and at the outlet of the material guide grooves, the concave surface of the U-shaped heating plate faces one side of the two material guide grooves, and the upper end and the lower end of the U-shaped heating plate are respectively suspended on the upper portion of the upper zipper strip and the lower portion of the lower pull chain in parallel.

Furthermore, a fixing frame is arranged at one end, far away from the two winding rollers, of the mounting frame, the fixing frame is arranged above the bag making film at the top, a rolling plate for rolling the idler wheels is arranged right above the bonding position of the bag making film and the self-sealing zipper, and a strip-shaped groove for the bottom ends of the idler wheels to penetrate through is arranged in the middle of the rolling plate in a penetrating mode.

Further, the gyro wheel is equipped with two, and these two gyro wheels articulate on a liftable lifing arm through two linking arms, the lifing arm is by installing the lift cylinder drive on the mount top.

Furthermore, the connecting arm is composed of a straight rod hinged to the lifting arm and an inverted L-shaped arm support vertically arranged on the end face of the straight rod, and the roller is rotatably arranged between the straight rod and the inverted L-shaped arm support.

Furthermore, the rolling plate is provided with leaf springs matched with the two end faces of the connecting arm at two ends in the length direction of the strip-shaped groove, one ends of the leaf springs are fastened on the rolling plate through screws, and the other ends of the leaf springs extend towards one side of the bag making film at an inclined angle and are connected with the heating ring.

Furthermore, the two leaf springs are symmetrically distributed on two sides of the width direction of the strip-shaped groove, and the inclination angle between the leaf springs and the rolling plate is 15 degrees.

Furthermore, the heating rings are of a U-shaped structure and are symmetrically distributed with two, two ends of the heating rings in the U-shaped opening direction are respectively and fixedly mounted on the lower portions of the two leaf springs through screws, the heating rings are arranged in parallel with the rolling plate and the bag making film, the distance between the two heating rings is the same as the length of the self-sealing zipper, and the width of each heating ring is matched with the width of the self-sealing zipper.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

according to the invention, the separated self-sealing zipper is arranged between the two bag-making films, the upper zipper strip and the lower zipper strip of the self-sealing zipper are respectively thermally bonded on the corresponding end surfaces of the two bag-making films in the material guide grooves through the U-shaped heating plates, so that the whole self-sealing zipper is prevented from being directly thermally sealed on the bag-making films, and meanwhile, the self-sealing zipper and the bag-making films are more tightly bonded through the sliding rolling of the two rollers in the fixing frame on the upper parts of the bag-making films carrying the self-sealing zipper, and the heating rings are abutted to thermally seal the edges of the self-sealing zipper and the bag-making films, so that the fastening effect is improved.

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 of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;

FIG. 2 is a schematic view of a bird's eye view of the apparatus of the present invention;

FIG. 3 is a schematic diagram of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic diagram of the structure of FIG. 2 at B in accordance with the present invention;

FIG. 5 is a schematic cross-sectional view of the overall structure of the apparatus of the present invention;

FIG. 6 is an exploded view of the fixing frame of the present invention;

FIG. 7 is a schematic view of the leaf spring and heating ring assembly of the present invention;

FIG. 8 is a schematic side view of the apparatus of the present invention;

fig. 9 is a schematic structural diagram at C in fig. 8 according to the present invention.

The reference numerals in the drawings denote: 1-mounting rack, 101-winding roller, 1011-bag making film, 102-self-sealing zipper, 1021-material guide groove, 1022-upper zipper strip, 1023-lower zipper, 103-roller, 1031-connecting arm, 10311-straight rod; 10312-inverted L-shaped arm support; 1032-a lifting arm; 1033-a lifting cylinder; 104-a heating ring; 105-a turning roll; 1051-an electric machine; 106-U shaped heating plate; 107-a fixed mount; 1071-rolling the plate; 10711-a bar groove; 10712-leaf spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.

The present invention will be further described with reference to the following examples.

Example (b): a high-speed four-edge sealing double-row self-sealing zipper bag device comprises a mounting frame 1, wherein the mounting frame 1 is provided with two winding rollers 101 which are distributed up and down symmetrically, the winding rollers 101 in the embodiment are driven by a motor arranged outside, the rotating directions of the two winding rollers 101 are the same, bag-making films 1011 are respectively sleeved on the two winding rollers 101, for the four-edge bag sealing processing procedure in the prior art, the two bag-making films 1011 are equal in size and are subjected to four-edge heat sealing in a subsequent heat sealing mould, a material guide groove 1021 for moving the self-sealing zipper 102 is arranged on the mounting frame 1 and positioned between the two winding rollers 101, the blanking of the self-sealing zipper 102 in the embodiment is the prior art, meanwhile, an upper zipper 1022 and a lower pull chain 1023 are repeated to be mutually matched long strips (refer to figure 3), the prior art is also, the present embodiment is omitted, the self-sealing zipper 102 is divided into an upper zipper 1022 and a lower pull chain 1022 which are mutually matched, the upper zipper 1023 and the lower chain 1023 respectively move towards one side of the two bag-making films 1011 and are subjected to heat sealing processing The self-sealing bag making film is attached to the end faces of two bag making films 1011, a roller 103 which can roll on the bag making films 1011 and can compact the self-sealing zipper 102 and the bag making films 1011 is arranged on the mounting frame 1 and above the top bag making films 1011, and a heating ring 104 which can move towards one side of the bag making films 1011 and can carry out secondary heat sealing on the connection part of the bag making films 1011 and the self-sealing zipper 102 is arranged on the mounting frame 1.

Referring to fig. 2 and 3, the two material guiding grooves 1021 are provided with upward openings, the upper zipper strip 1022 and the lower zipper 1023 slide in the two material guiding grooves 1021 respectively, the contact surfaces of the material guiding grooves 1021 and the molded self-sealing zipper 102 are made of a PI plastic material with high heat resistance, the material guiding grooves 1021 are deformed due to the fact that the temperature of the U-shaped heating plate 106 on one side of the material guiding grooves 1021 is too high, the PI plastic with high heat deformation temperature is adopted, the material guiding grooves 1021 are all subjected to smoothing treatment, and the friction force between the material guiding grooves 1021 and the molded self-sealing zipper 102 is very small.

Referring to fig. 3, two rotating rollers 105 are installed on the mounting frame 1 to abut against the end surface of the zipper 1022 and the pull-down chain 1023 on the opening side of the material guiding chute 1021, the two rotating rollers 105 are arranged in parallel, and one end of each rotating roller 105 is connected to a motor 1051 installed on the upper end of the mounting frame 1 through a transmission mechanism, which is a rotating wheel installed on one end of each rotating roller 105 and engaged with a transmission belt, one of the rotating wheels is connected with the rotating roller 105 through an output shaft of the motor 1051, other transmission modes can be used as a substitute in the actual use process, the rotating wheel and the rotating roller are made of rubber materials with larger friction force with the end face of the self-sealing zipper 102, in the actual use process, the rotating roller 105 can also be made of other materials with high contact friction coefficient with the self-sealing zipper 102, and the material used for the self-sealing zipper 102 in the embodiment is the common material of the self-sealing zipper 102 in the prior art, and the heat deformation temperature is low.

Referring to fig. 5, a U-shaped heating plate 106 is disposed on the mounting frame 1 at the exit of the material guiding groove 1021, the concave surface of the U-shaped heating plate 106 faces one side of the two material guiding grooves 1021, and the upper and lower ends of the U-shaped heating plate 106 are respectively suspended in parallel on the upper portion of the upper zipper 1022 and the lower portion of the pull-down chain 1023, in this example, the U-shaped heating plate 106 has a small volume and a small heating area, and only the upper portion of the upper zipper 1022 and the lower portion of the pull-down chain 1023 are locally heated to be thermally deformed to a certain degree and generate viscosity.

Referring to fig. 5, a fixing frame 107 is installed at one end of the mounting frame 1 away from the two winding rollers 101, the fixing frame 107 is installed above the top bag making film 1011, a rolling plate 1071 for rolling the roller 103 is installed at the position, right above the bonding position of the bag making film 1011 and the self-sealing zipper 102, of the fixing frame 107, a strip-shaped groove 10711 for passing the bottom end of the roller 103 is arranged in the middle of the rolling plate 1071 in a penetrating manner, a winding device is arranged at the other end of the bag making film 1011 shown in the present embodiment, the driving manner is a transmission manner for processing the known bag making film 1011, and the present embodiment is not shown.

Referring to fig. 6, there are two rollers 103, and the two rollers 103 are hinged to a lifting arm 1032 capable of ascending and descending through two connecting arms 1031, the lifting arm 1032 is driven by a lifting cylinder 1033 installed at the top end of the fixing frame 107, the rollers 103 in this embodiment are suspended in the grooves of the strip-shaped grooves 10711 in a non-moving state and do not abut against the end surface of the bag-making film 1011, when the lifting cylinder 1033 is activated, the transmission of the bag-making film 1011 is stopped at this time until the two rollers 103 complete the reciprocating stroke and return to the original position to start the transmission again.

Referring to fig. 5, the connecting arm 1031 is composed of a straight rod 10311 hinged to the lifting arm 1032 and an inverted L-shaped arm rest 10312 vertically provided on an end surface of the straight rod 10311, and the roller 103 is rotatably installed between the straight rod 10311 and the inverted L-shaped arm rest 10312, in this example, the inverted L-shaped arm rest 10312 and the bottom of the straight rod 10311 are smoothed, and at the same time, elongated slots (refer to fig. 4) for the leaf springs 10712 to extend downward at an oblique angle are provided on both sides of a bar-shaped slot 10711 on the rolling plate 1071, and the leaf springs 10712 can move toward the elongated slots by abutting against the arc surfaces of the leaf springs 10712 with the movement of the connecting arm 1031.

Referring to fig. 6, the rolling plate 1071 is provided with a leaf spring 10712 at both ends in the length direction of the strip groove 10711 to be engaged with both end surfaces of the connecting arm 1031, one end of the leaf spring 10712 is screwed to the rolling plate 1071, and the other end of the leaf spring 10712 extends toward one side of the bag making film 1011 at an inclined angle and is connected to the heating ring 104, and in the actual use process, other elastic mechanisms can be used as the elastic mechanism for elastically lifting the heating ring 104, and meanwhile, the heating ring 104 in this embodiment can adjust the size of the replacement heating ring 104 by combining the width of the slide fastener 102.

Referring to fig. 6 and 7, the two leaf springs 10712 are symmetrically disposed on both sides of the width direction of the strip-shaped groove 10711, and the inclination angle between the leaf springs 10712 and the rolling plate 1071 is 15 °, so that the leaf springs 10712 may be pressed against each other and the rotation angle is smaller during actual use, and the inclination angle between the leaf springs 10712 and the rolling plate 1071 may be adjusted accordingly during actual use to achieve the force of contacting the heating ring 104 with the bagging film 1011.

Referring to fig. 6, two heating rings 104 are symmetrically distributed in a U-shaped structure, two ends of the U-shaped opening of the heating rings 104 are respectively screwed and fastened to the lower portions of two leaf springs 10712, the heating rings 104 are parallel to a rolling plate 1071 and a bag making film 1011, the distance between the two heating rings 104 is the same as the length of the self-sealing zipper 102, the width of the heating rings 104 is matched with the width of the self-sealing zipper 102, the heating rings 104 in this embodiment are electrified through the internal connection of the rolling plate 1071 through one end of an outer arc surface, the heating area is small, and the bag making film 1011 and the self-sealing zipper 102 can be quickly attached and heat-sealed at the contact side.

For the convenience of understanding, the working principle and the using method of the high-speed four-edge sealing double-row self-sealing zipper bag device are discussed.

When the device is used, firstly, the bag making films 1011 on the two winding rollers 101 are in same-direction transmission and finally are closed, the self-sealing zipper 102 is placed in the material guide grooves 1021, the motor 1051 is started to drive the transmission mechanism to drive the two rotating rollers 105 to rotate, so that the upper part and the lower part of the self-sealing zipper 102 are respectively in transmission in the two material guide grooves 1021, when the upper part and the lower part of the self-sealing zipper 102 pass through the U-shaped heating plates, the upper part and the lower part of the self-sealing zipper 102 are heated to slightly melt to generate viscosity, and along with the transmission of the self-sealing zipper 102, the port part of the port self-sealing zipper 102 enters between the two bag making films 1011 at the moment, so that the bag making films 1011 can be parallelly adhered to the corresponding end faces of the bag making films 1011 and are in transmission along with the transmission of the bag making films 1011;

when the bag making film 1011 with the self-sealing zipper 102 is moved into the fixing frame 107, the lifting cylinder 1033 on the fixing frame 107 is started to drive the lifting arm 1032 to lift, when the lifting arm 1032 lifts, the two connecting arms 1031 hinged on the lifting arm 1032 can drive the rollers 103 to roll in the strip-shaped grooves 10711, the distance between the two rollers 103 can gradually become longer along with the rotation of the two connecting arms 1031, the rollers 103 can roll towards the two ends of the strip-shaped grooves 10711 in the length direction, meanwhile, the rollers 103 can roll on the upper end of the bag making film 1011 with the self-sealing zipper 102, so that the self-sealing zipper 102 and the bag making film 1011 are more tightly heat-sealed, when the two ends of the connecting arms 1031 are abutted against the sheet spring 10712, the two rollers 103 move to the two ends of the self-sealing zipper 102 in the length direction respectively, at this time, the connecting arms 1031 can gradually press down along the inclined surface of the sheet spring 10712, and the heating ring 104 installed at one end of the sheet spring 10712 can be attached to the two ends of the zipper 102, and heat sealing the edge part is provided, so that the heat sealing effect is improved, and then the next step of mold heat sealing processing is carried out.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.