Packaging equipment for back-sealed packaging bag

Abstract

The invention relates to the technical field of packaging equipment, in particular to packaging equipment for back-sealed packaging bags. Comprising a feeding mechanism, a pulling mechanism and a back sealing mechanism, the back sealing mechanism comprises a frame body, back sealing wheels and a back sealing motor, the back sealing wheels are located on the two opposite sides in the feeding direction respectively, and the back sealing motor is connected with any back sealing wheel and can drive the back sealing wheel opposite to the back sealing wheel to rotate; wherein a material injection unit and a material injection guide pipe are further arranged on the frame body, a material injection opening communicated with the material injection guide pipe is formed in the bottom end of the material injection unit, the material injection guide pipe is consistent with the feeding direction, and a material pushing part is arranged in the material injection guide pipe; a guide plate block is further arranged outside the material injection guide pipe, and the guide plate block is used for folding the material belt and wrapping the material belt outside the material injection guide pipe; the back sealing mechanism and the material injection unit are used for achieving back sealing and material injection of the adhesive film, the machining procedure is simplified, and automatic material injection is achieved through the arrangement of the material pushing part.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and in particular, to a packaging equipment for back-sealing packaging bags. Background Art

[0002] In the modern packaging industry, back-sealing packaging bags are widely used in many fields such as food, daily necessities, and chemical products due to their good sealing performance and convenient storage, and the requirements for their production efficiency and quality are also increasing day by day.

[0003] At present, traditional back-sealing packaging bag packaging equipment has many deficiencies in practical applications. On the one hand, the back-sealing of the adhesive film and the material injection process often require multiple devices and multiple processes to cooperate, which not only leads to a cumbersome production process, a large floor area of the equipment, but also increases the labor operation and equipment maintenance costs and reduces the production efficiency; on the other hand, in the material injection link, manual assistance or relatively simple injection methods are mostly used, and it is difficult to achieve accurate and efficient automatic injection, and there are problems such as uneven injection and low efficiency, which affect the product quality and production benefits. Therefore, there is an urgent need for a back-sealing packaging bag packaging equipment that can simplify the processing procedures and achieve automatic injection to meet the growing production needs of the industry. Summary of the Invention

[0004] The purpose of the present invention is to provide a technical effect of a packaging equipment for back-sealing packaging bags that realizes the back-sealing and injection of the adhesive film through a back-sealing mechanism and an injection unit, simplifies the processing procedures, and realizes automatic injection through the setting of a pushing part in view of the above-mentioned existing technical problems.

[0005] In view of this, the present invention provides a packaging equipment for back-sealing packaging bags, which is characterized by comprising: A feeding mechanism, a pulling mechanism, and a back-sealing mechanism; The feeding mechanism includes a reel and a feeding motor; The pulling mechanism includes a driving roller, a driven roller, and a pulling motor, and the driving roller and the driven roller are arranged in parallel; The back-sealing mechanism includes a frame body, a back-sealing wheel, and a back-sealing motor. The back-sealing wheels are respectively located on opposite sides of the feeding direction, and the back-sealing motor is connected to any one of the back-sealing wheels and can drive the back-sealing wheel opposite to it to rotate; Wherein, an injection unit and an injection conduit are further provided on the frame body. The bottom end of the injection unit is provided with an injection port communicated with the injection conduit. The injection conduit is in the same direction as the feeding direction, and a pushing part is arranged in the injection conduit; A guiding plate is further provided outside the injection conduit, and the guiding plate is used to fold and wrap the material tape outside the injection conduit.

[0006] Furthermore, it further includes: The electric heating block is arranged on the frame body and is used to heat the back-sealing position of the plastic film, and is located at the position before the plastic film enters the back-sealing wheel.

[0007] Furthermore, it further includes: The tension mechanism is arranged between the feeding mechanism and the pulling mechanism, and includes a linkage arm and two tension rollers. The linkage arm includes two ends with opposite positions, and the linkage arm can be driven to swing towards the feeding mechanism or the pulling mechanism. The two tension rollers are arranged in parallel and are rotatably arranged at both ends of the linkage arm.

[0008] Furthermore, it further includes a first guiding roller and a second guiding roller. The first guiding roller is arranged between the tension mechanism and the pulling mechanism, and the second guiding roller is arranged between the pulling mechanism and the back-sealing mechanism.

[0009] Furthermore, it further includes a transverse sealing unit, including: The transverse sealing pressing block is arranged on both sides of the plastic film and is used to transversely seal the plastic film, and is provided with a driving part to drive the transverse sealing pressing block to move towards the plastic film.

[0010] Furthermore, it further includes a cutting unit, and the cutting unit is arranged after the transverse sealing unit.

[0011] Furthermore, the transverse sealing pressing block includes a first pressing block and a second pressing block, and is provided with a closing driving device to drive the opening and closing between the first pressing block and the second pressing block, and a heating part is arranged on any one of the transverse sealing pressing blocks.

[0012] Furthermore, the material pushing part is a screw metering and filling mechanism, including a screw part and a servo motor for driving the screw part to rotate.

[0013] Furthermore, the back-sealing wheel is provided with sealing lines.

[0014] Furthermore, the guiding plate is sleeved outside the injection material conduit, and a gap for the plastic film to pass through is formed between the guiding plate and the injection material conduit, and an opening for the sealing position of the plastic film to move is arranged on one side of the guiding plate.

[0015] The beneficial effects of the present invention are: 1. The present invention realizes the back-sealing and injection of the plastic film through the back-sealing mechanism and the injection unit, simplifies the processing procedure, and realizes automatic injection through the setting of the material pushing part.

[0016] 2. The guiding plate of the present invention is fixedly installed on the frame body and is sleeved outside the injection material conduit. The plastic film can be flattened in the gap formed between the guiding plate and the injection material conduit for the plastic film to pass through, and an opening for the sealing position of the plastic film to move is arranged at the top of the guiding plate, that is, both sides of the plastic film pass through the opening to the outside, making the plastic film into a tubular shape to be back-sealed, and improving the forming quality of the plastic film. Description of the Drawings

[0017] Figure 1 Schematic three-dimensional structure diagram of the back sealing mechanism of the present invention; Figure 2 Schematic structure diagram of the feeding and pulling mechanisms of the present invention; Figure 3 Schematic cross-sectional structure diagram of the back sealing mechanism of the present invention; Figure 4 Schematic structure diagram of the guiding plate of the present invention; Figure 5 Schematic structure diagram of the transverse sealing unit and the cutting unit of the present invention.

[0018] The markings in the figure are indicated as: 1, feeding mechanism; 2, pulling mechanism; 3, back sealing mechanism; 101, reel; 102, feeding motor; 201, driving roller; 202, driven roller; 203, pulling motor; 301, frame; 302, back sealing wheel; 303, back sealing motor; 304, injection unit; 305, injection conduit; 306, guiding plate; 307, pushing part; 3041, injection port; 4, electric heating block; 5, tension mechanism; 501, linkage arm; 502, tension roller; 6, first guiding roller; 7, second guiding roller; 8, transverse sealing press block; 9, cutting unit; 10, first press block; 11, second press block; 12, opening. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0020] Embodiment 1: This embodiment provides a packaging device for back-sealing packaging bags, including: A feeding mechanism 1, a pulling mechanism 2, and a back sealing mechanism 3; The feeding mechanism 1 includes a reel 101 and a feeding motor 102; The pulling mechanism 2 includes a driving roller 201, a driven roller 202, and a pulling motor 203, and the driving roller 201 and the driven roller 202 are arranged in parallel; The back sealing mechanism 3 includes a frame 301, a back sealing wheel 302, and a back sealing motor 303. The back sealing wheels 302 are respectively located on opposite sides in the feeding direction, and the back sealing motor 303 is connected to any one of the back sealing wheels 302 and can drive the back sealing wheel 302 opposite thereto to rotate; Among them, a feeding unit 304 and a feeding conduit 305 are further provided on the frame body 301. A feeding port 3041 communicating with the feeding conduit 305 is provided at the bottom end of the feeding unit 304. The feeding conduit 305 is in the same direction as the feeding direction, and a pushing part 307 is provided in the feeding conduit 305; A guiding plate 306 is further provided outside the feeding conduit 305. The guiding plate 306 is used to fold and wrap the tape around the outside of the feeding conduit 305.

[0021] The feeding mechanism 1 includes a reel 101 and a feeding motor 102. An original film roll is mounted on the reel 101. The original film roll is the raw material film for producing packaging bags. The feeding motor 102 is preferably a servo motor. It should be noted that both the reel 101 and the feeding motor 102 are usually fixedly arranged on a mounting plate (prior art, the mounting plate is not shown in the structure diagram for easy observation). The pulling mechanism 2 includes a driving roller 201 and a driven roller 202. The driving roller 201 is driven by a pulling motor 203. The pulling motor 203 is preferably a servo motor. The driven roller 202 contacts the driving roller 201. When the driving roller 201 rotates, the driven roller 202 contacting the driving roller 201 rotates together by friction, and the film is placed between the driving roller 201 and the driven roller 202. The driving wheel and the driven wheel abut on both sides of the film, so that the pulling mechanism 2 moves the film.

[0022] After the pulling mechanism 2 in the feeding direction, there is also a back-sealing mechanism 3. The back-sealing mechanism 3 is used to fold the sheet-shaped plastic film into a tube shape and perform back-sealing. The back-sealing mechanism 3 includes a frame body 301. On the frame body 301, two back-sealing wheels 302 are rotatably arranged on opposite sides of the plastic film feeding direction respectively. A back-sealing motor 303 is also fixedly arranged on the frame body 301. A transmission wheel is arranged in the axial direction of the back-sealing wheel 302. The transmission wheel includes but is not limited to a pulley and a gear. The back-sealing motor 303 is connected to any one of the back-sealing wheels 302 and drives the back-sealing wheel 302 to rotate through a form including but not limited to a bevel gear set. For example, the axis of the output shaft of the back-sealing motor 303 is perpendicular to the axis of the back-sealing wheel 302. A bevel gear is arranged on the shaft rod for installing the back-sealing wheel 302, and another bevel gear that cooperates with the previous bevel gear is arranged on the output shaft of the back-sealing motor 303; A feeding unit 304 and a feeding conduit 305 are fixedly installed on the frame body 301. The feeding unit 304 includes a feeding groove. The feeding groove is in a horn shape and is arranged upward to facilitate adding the materials to be packaged. The bottom end of the feeding groove is communicated with the feeding conduit 305, and the discharging direction of the feeding conduit 305 is the same as the feeding direction of the plastic film. A pushing part 307 is arranged in the feeding conduit 305. The pushing part 307 is used to push the materials in the feeding conduit 305 into the back-sealed plastic film cavity. A guiding plate 306 is also arranged outside the feeding conduit 305. The contact surface of the guiding plate 306 with the plastic film is a conical surface with a gradually decreasing inner diameter, and the guiding plate 306 in contact with the plastic film is smoothed to prevent the guiding plate 306 from scratching the plastic film.

[0023] The present invention realizes the back-sealing and feeding of the plastic film through the back-sealing mechanism 3 and the feeding unit 304, simplifies the processing procedure, and realizes automatic feeding through the arrangement of the pushing part 307.

[0024] Embodiment 2: This embodiment provides a packaging device for back-sealing packaging bags. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0025] It also includes: An electric heating block 4. The electric heating block 4 is arranged on the frame body 301 and is used to heat the back-sealing position of the plastic film, and is located at the position before the plastic film enters the back-sealing wheel 302.

[0026] The electric heating block 4 is fixedly arranged on the frame body 301, and a power supply for the electric heating block 4 can be arranged on the frame body 301, or an external circuit can also be used to supply power to the electric heating block 4. The common forms of the electric heating block 4 for back-sealing heating are as follows: Flat electric heating block 4 Structural features: It is in the shape of a flat plate, usually with a large heating area, and can be in full contact with the surface of the object to be heated. Generally, it consists of a heating element (such as a resistance wire), an insulating layer, and a metal shell. The heating element generates heat, the insulating layer prevents heat dissipation and electric leakage, and the metal shell plays a role in protection and fixation.

[0027] Working principle: When an electric current passes through the heating element, electrical energy is converted into heat energy, and the heat is transferred to the back-sealing material in contact with it through heat conduction, so that it is heated to the temperature required for sealing.

[0028] Strip-shaped electric heating block 4 Structural features: It is in the shape of a slender strip, and can be designed into different lengths and widths according to needs. It also contains a heating element and an insulating layer inside, and usually has a protective sleeve outside to prevent wear and short circuit.

[0029] Working principle: Similar to the flat type, after being powered on, the heating element generates heat, and the heat is conducted along the strip direction to linearly heat the back-sealing part. Due to its slender shape, it can more accurately heat the narrow-strip-shaped back-sealing area.

[0030] Application scenarios: It is often used in some packaging equipment with narrow back-sealing width requirements and high precision requirements, such as small pharmaceutical packaging machines, electronic component packaging machines, etc., which can achieve precise back-sealing heating and avoid heat diffusion to unnecessary areas.

[0031] Before the adhesive film enters the back-sealing wheel 302, preheat the back-sealing position of the adhesive film to make the sealing effect of the back-sealing wheel 302 on the adhesive film better.

[0032] It also includes: Tension mechanism 5, arranged between the feeding mechanism 1 and the pulling mechanism 2, includes a linkage arm 501 and two tension rollers 502. The linkage arm 501 includes two opposite ends, and the linkage arm 501 can be driven to swing towards the feeding mechanism 1 or the pulling mechanism 2. The two tension rollers 502 are arranged in parallel and are rotatably arranged at both ends of the linkage arm 501.

[0033] The tension mechanism 5 is a mechanism used to adjust the overall tension of the adhesive film, including a linkage arm 501 and tension rollers 502 rotatably arranged at both ends of the linkage arm 501. The tension rollers 502 are arranged in parallel, and the adhesive film is wound around the two tension rollers 502 in an S shape successively. The linkage arm 501 takes the middle position as the rotation center, or can also take the two ends as the rotation center. By rotating the linkage arm 501, the tension rollers 502 swing towards the feeding mechanism 1 or the pulling mechanism 2, so as to increase the feeding path length and thus increase the overall tension.

[0034] It further includes a first guide roller 6 and a second guide roller 7. The first guide roller 6 is arranged between the tension mechanism 5 and the material pulling mechanism 2, and the second guide roller 7 is arranged between the material pulling mechanism 2 and the back sealing mechanism 3.

[0035] The arrangements of the first guide roller 6 and the second guide roller 7 enable the adhesive film to enter the material pulling mechanism 2 and the back sealing mechanism 3 at a better angle.

[0036] It further includes a transverse sealing unit, including: A transverse sealing block 8 is arranged on both sides of the adhesive film and is used for transverse sealing of the adhesive film. It is provided with a driving part to drive the transverse sealing block 8 to move towards the adhesive film.

[0037] The transverse sealing unit is used to radially seal the ends of the adhesive film formed into a tubular shape, so that the material can be encapsulated in a sealed space. The transverse sealing block 8 is made of a metal material that is easy to conduct heat, and preferably there are two of them. The two transverse sealing blocks 8 are symmetrically arranged on both sides of the adhesive film. The driving part is composed of a mechanism in two movement directions. For example, a hydraulic cylinder is arranged to drive the transverse sealing block 8 to abut on both sides of the adhesive film, and the adhesive film is transversely sealed by applying pressure. By applying mechanical pressure, the contact surface of the adhesive film is closely fitted, and the sealing is achieved by using the intermolecular force (such as van der Waals force) or interfacial viscosity of the material itself. For some adhesive films with self - adhesiveness (such as certain PE and PVC films) or composite films with a pre - coated adhesive layer, the sealing can be achieved by cold pressing.

[0038] It further includes a cutting unit 9, and the cutting unit 9 is arranged after the transverse sealing unit.

[0039] The cutting unit 9 is used to cut the transverse sealing position and includes a blade and a knife groove, and cuts into individual packages radially through the blade and the knife groove.

[0040] The transverse sealing block 8 includes a first block 10 and a second block 11, and is provided with a closing driving device to drive the opening and closing between the first block 10 and the second block 11, and a heating part is arranged on any one of the transverse sealing blocks 8.

[0041] When the adhesive film is a thermoplastic material (such as PE, PP), the molecular chain activity is low at normal temperature, and it is difficult to closely combine only by pressure. It needs to be heated to the molten state (heat sealing) and then pressure is applied to make the molecular chains diffuse and entangle with each other, and a seal is formed after cooling.

[0042] The material pushing part 307 is a screw metering and filling mechanism, including a screw part and a servo motor for driving the screw part to rotate.

[0043] By controlling the number of turns of the screw part rotated by the servo motor, the feeding amount of the filled material is controlled.

[0044] The back sealing wheel 302 is provided with sealing lines.

[0045] Sealing patterns (heat-sealing patterns or embossing patterns), usually concave-convex patterns (such as grid patterns, diagonal patterns, straight patterns, tooth-shaped patterns, etc.). Raised parts: Apply higher pressure locally to the film, making the material more easily melt or deform at high temperatures (in heat-sealing scenarios), and promoting the mutual diffusion and entanglement of molecular chains. Recessed parts: Form a "material storage space" to prevent the molten material from being excessively extruded due to excessive pressure, resulting in thinning or breakage at the sealed part.

[0046] The guiding plate 306 is sleeved outside the injection conduit 305, and a gap for the film to pass through is formed between the guiding plate 306 and the injection conduit 305. And an opening 12 for the movement of the film sealing position is provided on one side of the guiding plate 306.

[0047] The guiding plate 306 is fixedly installed on the frame body 301 and is sleeved outside the injection conduit 305. The film can be flattened in the gap formed between the guiding plate 306 and the injection conduit 305 for the film to pass through. And an opening 12 for the movement of the film sealing position is provided at the top of the guiding plate 306, that is, both sides of the film pass through the opening 12 to the outside, making the film into a tubular shape to be back-sealed, and making the forming quality of the film higher.

[0048] Regarding how to ensure that the material is not pressed by the transverse sealing unit, the pushing part pushes the material to one end of the transverse sealing of the film, and then the transverse sealing unit performs transverse sealing at a position where the material cannot be pressed, and then repeats the above actions to achieve one push and one seal of the material.

[0049] It should be mainly noted that the power after the pulling mechanism is mainly provided by the back-sealing wheel, and a conveyor belt can be provided under the film after the transverse sealing unit to provide power.

[0050] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. An encapsulation device for a back-sealed packaging bag, characterized in that, Including: A feeding mechanism (1), a pulling mechanism (2) and a back sealing mechanism (3); The feeding mechanism (1) includes a reel (101) and a feeding motor (102); The pulling mechanism (2) includes a driving roller (201), a driven roller (202) and a pulling motor (203), and the driving roller (201) and the driven roller (202) are arranged in parallel; The back sealing mechanism (3) includes a frame body (301), back sealing wheels (302) and a back sealing motor (303). The back sealing wheels (302) are respectively located on opposite sides in the feeding direction, and the back sealing motor (303) is connected to any one of the back sealing wheels (302) and can drive the back sealing wheel (302) opposite thereto to rotate; Wherein, a filling unit (304) and a filling conduit (305) are further provided on the frame body (301). A filling port (3041) communicating with the filling conduit (305) is provided at the bottom end of the filling unit (304). The filling conduit (305) is in the same direction as the feeding direction, and a pushing part (307) is provided in the filling conduit (305); A guiding plate (306) is further provided outside the filling conduit (305), and the guiding plate (306) is used to turn and wrap the tape outside the filling conduit (305).

2. The encapsulation device for a back-sealed packaging bag according to claim 1, characterized in that, Also including: An electric heating block (4), which is arranged on the frame body (301) and is used to heat the back sealing position of the plastic film, and is located at the position before the plastic film enters the back sealing wheel (302).

3. The encapsulation device for a back-sealed packaging bag according to claim 1, wherein, Also including: A tension mechanism (5), which is arranged between the feeding mechanism (1) and the pulling mechanism (2), includes a linkage arm (501) and two tension rollers (502). The linkage arm (501) includes two opposite ends, and the linkage arm (501) can be driven to swing towards the feeding mechanism (1) or the pulling mechanism (2). The two tension rollers (502) are arranged in parallel and are rotatably arranged at both ends of the linkage arm (501).

4. The encapsulation device for a back-sealed packaging bag according to claim 3, characterized in that, Also including a first guiding roller (6) and a second guiding roller (7). The first guiding roller (6) is arranged between the tension mechanism (5) and the pulling mechanism (2), and the second guiding roller (7) is arranged between the pulling mechanism (2) and the back sealing mechanism (3).

5. An encapsulation device for a back-sealed packaging bag according to claim 1, characterized in that, Also including a transverse sealing unit, including: A transverse sealing block (8), which is arranged on both sides of the plastic film and is used to transversely seal the plastic film, and is provided with a driving part to drive the transverse sealing block (8) to move towards the plastic film; 6. The encapsulation device for a back-sealed packaging bag according to claim 5, characterized in that, Also including a cutting unit (9), which is arranged after the transverse sealing unit.

7. The encapsulation device for a back-sealed packaging bag according to claim 5, characterized in that, The transverse sealing block (8) includes a first block (10) and a second block (11), and is provided with a closing driving device to drive the opening and closing between the first block (10) and the second block (11), and a heating part is provided on any one of the transverse sealing blocks (8).

8. An encapsulation device for a back-sealed packaging bag according to claim 1, characterized in that, The pushing part (307) is a screw metering filling mechanism, including a screw part and a servo motor for driving the screw part to rotate.

9. The encapsulation device for a back-sealed packaging bag according to claim 1, characterized in that, The back sealing wheel (302) is provided with sealing lines.

10. The encapsulation device for a back-sealed packaging bag according to claim 1, characterized in that, The guiding plate (306) is sleeved outside the filling conduit (305), and a gap for the plastic film to pass through is formed between the guiding plate (306) and the filling conduit (305), and an opening (12) for the sealing position of the plastic film to move is provided on one side of the guiding plate (306).

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