Sealing structure and packaging machine

Abstract

The utility model discloses a sealing structure and a packaging machine, the sealing structure comprises a positioning assembly, a heating assembly and a driving structure, and a positioning part is formed on one side of the positioning assembly; the heating assembly is arranged in parallel with the positioning assembly and comprises an electric heating wire and a high-temperature adhesive tape corresponding to the positioning part, the electric heating wire is spirally arranged on the side, away from the positioning assembly, of the high-temperature adhesive tape, and the side edge part of the electric heating wire is in contact with the high-temperature adhesive tape to form a plurality of heat conduction parts which are arranged at intervals and used for providing a heat source for the high-temperature adhesive tape; according to the scheme, point breaking type hot melting sealing can be carried out on the bag opening of the packaging bag, a plurality of long-strip-shaped melting points which are arranged side by side at intervals are formed on the packaging bag, the multiple melting points are combined to seal the bag opening, by means of the sealing mode, a plastic film cannot be fused, the sealing effect is good, the attractiveness of the packaging bag is guaranteed, and meanwhile the sealing quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a sealing structure and a packaging machine. Background Art

[0002] Sealing machines are machines that seal containers filled with packaging materials. After the product is loaded into the packaging container, in order to keep the product sealed and preserved, maintain product quality, and avoid product loss, the packaging container needs to be sealed. There are many materials for making packaging containers, such as paper, plastic, glass, ceramics, metal, composite materials, etc. The shapes and physical properties of packaging containers are also different. When sealing plastic packaging bags, the existing technology generally uses a whole heating module to contact the bag mouth of the packaging bag, and the plastic material is melted at high temperature to fuse at the interface to form a seamless seal.

[0003] For example, the patent document with publication number CN105173242A provides a sealing device for a packaging machine, which mainly includes two telescopic rods and sealing blocks connected at the inner ends of the two telescopic ends. During implementation, a controller is used to control the telescopic driving mechanism of the telescopic rod to squeeze and fit the two sealing blocks to perform heat sealing on the packaging bag.

[0004] However, when sealing a plastic packaging bag with high heat resistance made of materials such as BOPP or OPP, the existing sealing device can only heat and melt the sealing position of the packaging bag to achieve sealing of the packaging bag. This sealing method will melt the sealing position of the packaging bag, which not only affects the aesthetics of the packaging bag, but also has poor sealing quality. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies, to provide a sealing structure and a packaging machine, and to solve the technical problem in the prior art that it is difficult to seal plastic packaging bags that are highly heat-resistant and difficult to seal.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a sealing structure, comprising: a positioning component, a heating component and a driving structure, wherein a positioning portion is formed on one side of the positioning component; the heating component is arranged in parallel with the positioning component, and comprises a heating wire and a high-temperature tape corresponding to the positioning portion, the heating wire is spirally arranged on the side of the high-temperature tape away from the positioning component, and the side portion of the heating wire is in contact with the high-temperature tape to form a plurality of spaced-apart heat-conducting portions for providing a heat source to the high-temperature tape, and the heating component and the positioning component are used to press the bag opening on both sides of the bag opening for sealing.

[0008] In some embodiments, the heat conductive portion of the heating wire is embedded in or adhered to the high temperature tape.

[0009] In some embodiments, the positioning portion of the positioning assembly includes a sealing strip, and the positioning assembly also includes a first sealing plate. The sealing strip corresponds to the position of the high-temperature tape and forms a sealing area between the sealing strip and the high-temperature tape. The sealing strip is arranged on one side of the first sealing plate.

[0010] In some embodiments, the heating component further includes a positioning plate and a second sealing plate. The positioning plate is arranged in parallel with the high-temperature tape, and an installation groove is opened on one side along the length direction. The heating wire is arranged in the installation groove.

[0011] In some embodiments, the heating component further includes a support member, and the support member is penetrated and fixed inside the heating wire to support the heating wire.

[0012] In some embodiments, the support member is a cylindrical rod-shaped structure, and its diameter is equal to the inner diameter of the heating wire.

[0013] In some embodiments, the support member is a ceramic rod.

[0014] In some embodiments, the sealing structure further includes two bases, which are respectively disposed at two ends of the heating wire, and the two ends of the heating wire are respectively fixedly connected to the two bases by screws.

[0015] In some embodiments, the sealing structure also includes a driving structure, which is connected to the positioning component and / or the heating component, and is used to drive the positioning component and the heating component to move relative to each other to compress the bag opening of the packaging bag; the driving structure includes a first cylinder, and the driving end of the first cylinder is connected to the heating component to drive the heating component to move relative to the positioning component; the driving structure also includes a linear shaft, a connecting plate and a second cylinder, the positioning component is fixedly arranged at one end of the linear shaft, the heating component is slidably connected to the linear shaft, and the driving end of the second cylinder is connected to the linear shaft through the connecting plate to drive the positioning component to move relative to the heating component through the connecting plate and the linear shaft.

[0016] In a second aspect, the utility model further provides a packaging machine, comprising a sealing structure as described in any one of the above items.

[0017] Compared with the prior art, the sealing structure and packaging machine provided by the utility model, through the positioning component and the heating component, the side of the electric heating wire forms a plurality of spaced-apart heat-conducting parts, heat is supplied through the plurality of spaced-apart heat-conducting parts, and the positioning part and the high-temperature tape in contact with the heat-conducting part are close to each other and can clamp the bag opening of the packaging bag, and can perform point-break hot-melt sealing at the bag opening of the packaging bag, so that a plurality of spaced-apart and parallel long strip-shaped melting points are formed on the packaging bag, and the plurality of melting points are combined to form a seal on the bag opening. The plastic film will not be melted by using this sealing method, and the sealing effect is good, thereby ensuring the aesthetics of the packaging bag and improving the sealing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the sealing structure installation provided by the embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the sealing structure provided by the embodiment of the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the heating wire provided by the embodiment of the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of a heating component of a sealing structure provided by an embodiment of the utility model;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of the installation of the sealing strip and the heating wire of the sealing structure provided by the embodiment of the utility model;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of a packaging machine provided by an embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of a packaging bag after being sealed by the sealing structure provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Positioning assembly; 11. Sealing strip; 12. First sealing plate; 2. Heating assembly; 21. Heating wire; 22. High-temperature tape; 23. Positioning plate; 231. Mounting groove; 24. Second sealing plate; 25. Base; 26. Screw; 3. Support; 31. Ceramic rod; 4. Driving structure; 41. First cylinder; 42. Linear shaft; 43. Connecting plate; 44. Second cylinder; 5. Frame plate; 6. Packaging machine; 7. Packaging bag; 71. Melting point. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] In order to solve the technical problem that the sealing device is not easy to seal plastic packaging bags with high heat resistance and difficult to seal, the utility model provides a sealing structure and a packaging machine, which can perform point-break hot-melt sealing at the bag opening of the packaging bag, so that a plurality of spaced and parallel long strip-shaped melting points are formed on the packaging bag, and the plurality of melting points are combined to form a seal on the bag opening. The plastic film will not be melted by this sealing method, and the sealing effect is good, thereby ensuring the aesthetics of the packaging bag and improving the sealing quality.

[0029] It should be noted that the sealing structure and packaging machine described in the utility model are used for but not limited to packaging machines, etc. For the convenience of explanation, in the utility model, only the sealing structure applied to the packaging machine is used as an example for explanation, and the principle of applying the sealing structure to other types of equipment is essentially the same as the principle applied to the packaging machine, which will not be repeated here.

[0030] First, see Figures 1 to 5 , Figure 7 The present embodiment provides a sealing structure, which includes: a positioning component 1, a heating component 2 and a driving structure 4, wherein one side of the positioning component 1 forms a positioning portion; the heating component 2 is arranged in parallel with the positioning component 1, and includes a heating wire 21 and a high-temperature tape 22 corresponding to the positioning portion, wherein the heating wire 21 is spirally arranged on a side of the high-temperature tape 22 away from the positioning component 1, and the side portion of the heating wire 21 is in contact with the high-temperature tape 22 to form a plurality of spaced heat-conducting portions for providing a heat source to the high-temperature tape 22; the driving structure 4 is connected to the positioning component 1 and / or the heating component 2, and is used to drive the positioning component 1 and the heating component 2 to move relative to each other to compress the bag opening of the packaging bag 7.

[0031] In this scheme, a positioning component 1, a heating component 2 and a driving structure 4 are provided. The heating component 2 supplies heat, and the driving structure 4 drives the positioning component 1 and the heating component 2 to move relative to each other until the bag opening of the packaging bag 7 is pressed tightly to achieve the sealing of the bag opening, wherein the side of the electric heating wire 21 forms a plurality of spaced-apart heat-conducting parts, and heat is supplied through the plurality of spaced-apart heat-conducting parts. The driving structure 4 drives the positioning part and the high-temperature adhesive tape 22 in contact with the heat-conducting part to approach and clamp the bag opening of the packaging bag 7, and a point-break hot-melt sealing can be performed at the bag opening of the packaging bag 7, so that a plurality of spaced-apart, parallel long strip-shaped melting points 71 are formed on the packaging bag 7, and the plurality of melting points 71 are combined to form a seal for the bag opening.

[0032] It should be noted that the high temperature tape 22 is an adhesive tape used in high temperature working environments. It is mainly used in the electronics industry, and its temperature resistance is usually between 120 degrees and 260 degrees. It is often used for spray painting, baking paint leather processing, coating masking, and fixing in the process of electronic parts, printed circuit boards, and high temperature processing masking. The high temperature tape 22 includes KAPTON high temperature tape, Teflon high temperature tape, high temperature masking tape, PET green high temperature tape, high temperature double-sided tape, etc. It is non-sticky and resistant to high and low temperatures. The product can withstand temperatures of up to 260°C for long-term use. Therefore, by setting the high temperature tape 22 to conduct the heat of the heating wire 21, it plays a role of isolation and protection, and at the same time can avoid the adhesion of the heating wire 21 to the film.

[0033] The heat-conducting part of the heating wire 21 contacts the high-temperature tape 22 to provide a heat source to the high-temperature tape 22. Preferably, in this embodiment, the heat-conducting part contacts the high-temperature tape 22 in an embedded manner, and the heat-conducting part of the heating wire 21 is embedded in the high-temperature tape 22. The installation stability of the heating wire 21 is high, avoiding uneven heat conduction of the heat-conducting part.

[0034] In other embodiments, the heat conducting portion of the heating wire 21 may also be disposed in contact with the high temperature tape 22 .

[0035] The positioning component 1 is arranged opposite to the heating component 2, and is used to cooperate with the heating component 2 to press the bag opening of the packaging bag 7 so that the heating component 2 can seal the packaging bag 7 by hot melting. In some embodiments, the positioning portion of the positioning component 1 includes a sealing strip 11, and the sealing strip 11 corresponds to the position of the high-temperature tape 22, and forms a sealing area between the sealing strip 11 and the high-temperature tape 22. The sealing strip 11 is a high-temperature resistant elastomer. During implementation, the sealing strip 11 contacts the film on one side of the bag opening, and it is not easy to adhere to the film, thereby improving the sealing effect; the positioning component 1 also includes a first sealing plate 12, and the first sealing plate 12 is arranged on one side of the sealing strip 11, and the sealing strip 11 is fixedly arranged on the first sealing plate 12.

[0036] In order to improve the stability of the heating wire 21, in this embodiment, the heating component 2 also includes a positioning plate 23 and a second sealing plate 24. The positioning plate 23 and the high-temperature tape 22 are arranged in parallel. The side of the high-temperature tape 22 facing away from the sealing strip 11 is adhered and fixed to one side of the positioning plate 23. A mounting groove 231 is opened along the length direction on the side of the positioning plate 23 pasted with the high-temperature tape 22. The heating wire 21 is arranged in the mounting groove 231. The size of the mounting groove 231 matches the heating wire 21, so as to fix the heating wire 21.

[0037] Furthermore, in some embodiments, the heating component 2 further includes a support member 3 , and the support member 3 is passed through and fixed inside the heating wire 21 to further support the heating wire 21 .

[0038] Preferably, the support member 3 is a ceramic rod 31 of a cylindrical rod-shaped structure, the diameter of which is equal to the inner diameter of the heating wire 21 , and is passed through and fixed inside the heating wire 21 to support the heating wire 21 .

[0039] Furthermore, the sealing structure also includes two bases 25, and the two bases 25 are respectively arranged at the two ends of the positioning plate 23. The two ends of the heating wire 21 extend to the ends protruding from the positioning plate 23, and the two ends are fixedly connected to the two bases 25 by screws 26. The two ends of the heating wire 21 are fixed by the base 25, which further improves the stability of the heating wire 21 and ensures the sealing effect of the heating component 2.

[0040] The driving structure 4 is used to drive the positioning component 1 and the heating component 2 to move relative to each other so as to press the bag opening of the packaging bag 7 to seal it. The driving structure 4 is connected to the positioning component 1 and / or the heating component 2. In this embodiment, the driving structure 4 has multiple structural forms.

[0041] For example, when the driving end of the driving structure 4 is connected to both the positioning component 1 and the heating component 2, the driving structure 4 includes a first cylinder 41, a linear shaft 42, a connecting plate 43 and a second cylinder 44, the driving end of the first cylinder 41 is fixedly connected to the second sealing plate 24 of the heating component 2 to drive the heating component 2 to move relative to the positioning component 1; the first sealing plate 12 of the positioning component 1 is fixedly arranged at one end of the linear shaft 42, the second sealing plate 24 of the heating component 2 is slidably connected to the linear shaft 42, and the driving end of the second cylinder 44 is fixedly connected to the linear shaft 42 through the connecting plate 43 to drive the positioning component 1 to move relative to the heating component 2 through the connecting plate 43 and the linear shaft 42. Specifically, the first cylinder 41 and the second cylinder 44 are both fixedly mounted on the frame plate 5, and the outer sliding sleeve of the linear shaft 42 is provided with a mounting seat, which is fixedly connected to the frame plate 5, thereby realizing the installation of the sealing structure.

[0042] For another example, when the driving end of the driving structure 4 is connected to the heating component 2, the driving structure 4 includes a first cylinder 41, and the driving end of the first cylinder 41 is fixedly connected to the second sealing plate 24 of the heating component 2 to drive the heating component 2 to move relative to the positioning component 1;

[0043] Alternatively, the driving end of the driving structure 4 is connected to the positioning component 1. In this case, the driving structure 4 includes a linear shaft 42, a connecting plate 43 and a second cylinder 44. The first sealing plate 12 of the positioning component 1 is fixedly arranged at one end of the linear shaft 42, and the second sealing plate 24 of the heating component 2 is slidingly connected to the linear shaft 42. The driving end of the second cylinder 44 is fixedly connected to the linear shaft 42 through the connecting plate 43, so as to drive the positioning component 1 to move relative to the heating component 2 through the connecting plate 43 and the linear shaft 42.

[0044] During implementation, the first cylinder 41 can be used to drive the second sealing plate 24 to move toward the positioning component 1 according to the position of the packaging bag 7, and the second cylinder 44 can be used to drive the first sealing plate 12 to move toward the heating component 2 through the connecting plate 43 and the linear shaft 42, until the sealing strip 11 and the high-temperature tape 22 clamp the bag opening of the packaging bag 7, the heating wire 21 heats up instantly, and the heat is transferred to the bag opening through the high-temperature tape 22, and a point-break hot-melt seal is performed at the bag opening, so that a plurality of spaced-apart, long strip-shaped melting points 71 are formed on the packaging bag 7, and the plurality of melting points 71 are combined to form a seal for the bag opening.

[0045] Second, see Figure 6 This embodiment also provides a packaging machine 6, including a sealing structure as described in any one of the above embodiments.

[0046] The bag-feeding packaging machine 6 includes a frame, a bag-dispensing structure, a bag-taking structure, a clamping structure, a bag-opening structure, a material-discharging structure and a sealing structure. Among them, the bag-dispensing structure, the bag-taking structure, the clamping structure, the bag-opening structure, the material-discharging structure and the sealing structure are all installed on the frame, and the bag-dispensing structure is used to place the packaging bag 7; the bag-taking structure is arranged in the frame, and is used to transfer the packaging bag 7 on the bag-dispensing structure to the clamping structure; the clamping structure is used to clamp the two sides of the packaging bag 7, the bag-opening structure is used to open the packaging bag 7, the material-discharging structure is used to convey materials into the opened packaging bag 7, and the sealing structure is used to seal the bag opening of the packaging bag 7. The specific forms of the frame, the bag-dispensing structure, the bag-taking structure, the clamping structure, the bag-opening structure and the material-discharging structure are not limited here.

[0047] The utility model forms a plurality of spaced-apart heat-conducting parts on the side of the electric heating wire 21 through the arrangement of the positioning component 1, the heating component 2 and the driving structure 4, and supplies heat through the plurality of spaced-apart heat-conducting parts. The driving structure 4 drives the positioning part and the high-temperature adhesive tape 22 in contact with the heat-conducting part to approach each other and clamp the bag opening of the packaging bag 7. Point-break hot-melt sealing can be performed at the bag opening of the packaging bag 7, so that a plurality of spaced-apart and parallel long strip-shaped melting points 71 are formed on the packaging bag 7. The plurality of melting points 71 are combined to form a seal on the bag opening. The plastic film will not be melted by the sealing method, and the sealing effect is good, thereby ensuring the aesthetics of the packaging bag 7 and improving the sealing quality.

[0048] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sealing structure, characterized in that: include: A positioning component, one side of which forms a positioning portion; as well as, A heating component is arranged in parallel with the positioning component, and includes a heating wire and a high-temperature tape corresponding to the positioning part. The heating wire is spirally arranged on the side of the high-temperature tape away from the positioning component, and the side portion of the heating wire is in contact with the high-temperature tape to form a plurality of spaced heat-conducting parts for providing a heat source to the high-temperature tape. The heating component and the positioning component are used to press the bag opening on both sides of the bag opening to seal it.

2. The sealing structure according to claim 1, characterized in that: The heat conducting part of the heating wire is embedded in or attached to the high temperature tape.

3. The sealing structure according to claim 2, characterized in that: The positioning portion of the positioning assembly includes a sealing strip, and the positioning assembly also includes a first sealing plate. The sealing strip corresponds to the position of the high-temperature tape and forms a sealing area between the sealing strip and the high-temperature tape. The sealing strip is arranged on one side of the first sealing plate.

4. The sealing structure according to claim 3, characterized in that: The heating component further includes a positioning plate and a second sealing plate. The positioning plate is arranged in parallel with the high-temperature tape, and a mounting groove is opened on one side of the positioning plate along the length direction. The heating wire is arranged in the mounting groove.

5. The sealing structure according to claim 1, characterized in that: The heating component also includes a support member, which is passed through and fixed inside the heating wire to support the heating wire.

6. The sealing structure according to claim 5, characterized in that: The support member is a cylindrical rod-shaped structure, and its diameter is equal to the inner diameter of the heating wire.

7. The sealing structure according to claim 6, characterized in that: The supporting member is a ceramic rod.

8. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises two bases, which are respectively arranged at two ends of the heating wire, and the two ends of the heating wire are respectively fixedly connected to the two bases by screws.

9. The sealing structure according to claim 1, characterized in that: The sealing structure further includes a driving structure, which is connected to the positioning component and / or the heating component and is used to drive the positioning component and the heating component to move relative to each other to press the bag opening of the packaging bag; The driving structure comprises a first cylinder, a driving end of which is connected to the heating component to drive the heating component to move relative to the positioning component; The driving structure also includes a linear shaft, a connecting plate and a second cylinder. The positioning assembly is fixedly arranged at one end of the linear shaft. The heating assembly is slidably connected to the linear shaft. The driving end of the second cylinder is connected to the linear shaft through the connecting plate to drive the positioning assembly to move relative to the heating assembly through the connecting plate and the linear shaft.

10. A packaging machine, characterized in that: It comprises a sealing structure as described in any one of claims 1 to 9.

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