Heat-sealing, pressing and bag-cutting structure of bag making machine
Through the innovative structural design of the "П"-shaped heat sealing knife and toothed cutter, the problem of easy carbonization of the heat cutting knife module of the traditional bag making machine is solved, realizing an efficient cutting and sealing process, extending the life of the cutter and simplifying the maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-27
AI Technical Summary
In the traditional bag-making machine's heat-sealing and cutting structure, the hot-cutting blade module is prone to forming a carbonized layer after prolonged use, leading to defects such as burrs on the cut and poor sealing. This requires frequent cleaning and maintenance, affecting smooth production.
It adopts an innovative structural design of "П"-shaped heat sealing knife and toothed cutting knife. The lower end face of the toothed cutting knife is lower than that of the heat sealing knife. It replaces heat melting with physical cutting. Combined with a buffer elastic structure and detachable design, it simplifies the structure and extends the life of the cutting knife.
It significantly improves the reliability of the cutting and sealing process, reduces the possibility of molten plastic adhering, extends the life of the cutter, simplifies maintenance operations, and improves production efficiency.
Smart Images
Figure CN224044724U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bag making machine equipment technical field, especially a kind of heat sealing and pressing and bag cutting structure of bag making machine. BACKGROUND
[0002] Plastic packaging bag, shopping bag, garbage bag and starch-based degradable bag, as the packaging material widely used in modern industry, its processing equipment bag making machine technology evolution always revolves around heat sealing and cutting efficiency. The traditional bag making machine heat sealing and pressing and bag cutting structure adopts hot cutting knife module as core component, the temperature of knife body is raised to 200-300 DEG C by resistance heating, high temperature is used to realize the fusing and sealing of plastic film. Although this technology can ensure that the cut is smooth and the sealing is tight, when continuously processing plastic material, the molten plastic is easy to form an adhesive layer on the knife surface. With the production time accumulation, the dense carbonized layer is formed after the carbonization of the adhesive layer at high temperature, and the thermal conductivity coefficient of the carbonized layer is lower than that of the stainless steel substrate, which leads to the attenuation of the heat conduction efficiency of the knife body. The mechanical peeling of carbonized layer can cause defects such as burr and virtual welding of sealing edge, which leads to the inconvenience of subsequent bag cutting production. Frequent cleaning and maintenance operations are required, so further improvement is needed. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a heat sealing and pressing and bag cutting structure of bag making machine.
[0004] The technical scheme adopted by one embodiment of the utility model to solve its technical problem is: a heat sealing and pressing and bag cutting structure of bag making machine, comprising: a knife holder, a heat sealing knife and a pressing plate arranged on the knife holder.
[0005] The pressing plate is provided with two, which are arranged on the opposite sides of the heat sealing knife; the lower end of the heat sealing knife is in a "П" type structure, and is provided with a transition groove; the transition groove is detachably provided with a cutting knife fixing plate; the cutting knife fixing plate is detachably provided with a tooth cutting knife; the lower end surface of the tooth cutting knife is lower than the lower end surface of the heat sealing knife.
[0006] Optionally, the cutting knife fixing plate is in the shape of an inverted "U" type clamping plate, and the tooth cutting knife is clamped in the cutting knife fixing plate.
[0007] Optionally, the tooth cutting knife and the cutting knife fixing plate are provided with matching bolt limiting holes.
[0008] Optionally, the tooth cutting knife is provided with cutting teeth at the upper and lower ends.
[0009] Optionally, the heat sealing knife is provided with a cloth fixing support at the two ends; the cloth fixing support is provided with a cloth rolling roller; and the cutting knife fixing plate is detachably arranged on the cloth fixing support.
[0010] Optionally, the heat sealing cutter is connected to the cutter holder through a first guide column; the first guide column is provided with a first buffer elastic structure.
[0011] Optionally, the pressing plate is connected to the cutter holder through a second guide column; the second guide column is provided with a second buffer elastic structure.
[0012] Optionally, the pressing plate is provided with a plurality of heat dissipation holes.
[0013] Optionally, the heat dissipation holes are vertically arranged elliptical hole structures.
[0014] Optionally, a lower pressing base is arranged below the cutter holder; the lower pressing base is provided with an avoiding broken groove; the tooth cutter can extend into the avoiding broken groove.
[0015] The beneficial effects of the present application are as follows: through the innovative structural design of the "П" type heat sealing cutter and the tooth cutter, the reliability of the heat melting cutting and sealing process is significantly optimized. Specifically, the pressing plate is pressed against the biodegradable bag film on both sides of the heat sealing cutter, and the design that the lower end surface of the tooth cutter is lower than the heat sealing cutter makes the cutting action prior to the heat sealing contact. The biodegradable bag is cut by the intermittent contact of the tooth-shaped blade, and the cutting process is physical cutting, without the need to heat the tooth cutter. The cutting is not by the heat melting cutting method, and the cutter is not easy to adhere to the molten plastic, so the service life of the cutter can be effectively prolonged. At the same time, since the tooth cutter does not need to be heated, the arrangement of the heating assembly and the transformer and other devices of the tooth cutter can be reduced, and the overall structure of the bag making machine heat sealing and pressing can be further simplified.
[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0018] Figure 1 FIG. 1 is a structural schematic diagram of a heat sealing and pressing bag cutting structure of the present application;
[0019] Figure 2 FIG. 2 is a transverse sectional view of the heat sealing and pressing bag cutting structure in FIG. 1; Figure 1
[0020] Figure 3 FIG. 3 is a longitudinal sectional view of the heat sealing and pressing bag cutting structure in FIG. 1. Figure 1
[0021] Main element symbol explanation:
[0022] 10, knife holder; 20, heat sealing knife; 21, transition groove; 30, pressing plate; 31, heat dissipation hole; 40, cutter fixing plate; 50, tooth cutter; 51, bolt limiting hole; 60, cloth ironing fixing support; 61, cloth ironing roller; 70, first guide column; 71, first buffer elastic structure; 80, second guide column; 81, second buffer elastic structure. DETAILED DESCRIPTION
[0023] This part will describe the specific embodiments of the utility model in detail, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.
[0024] In the description of the utility model, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, above, below, etc. is included in the number. If it is described as first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0025] In the description of the utility model, it is understood that the position description, such as up, down, front, back, left, right, etc. is based on the position or location relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not used to indicate or imply that the device or element indicated must have a specific position, be constructed and operated in a specific position, so it cannot be understood as the limitation of the utility model.
[0026] In the utility model, unless otherwise explicitly limited, the words such as "set", "install", "connect" should be understood broadly, for example, it can be directly connected, or indirectly connected through intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected; it can be the communication or interaction relationship between two elements inside two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.
[0027] EMBODIMENT
[0028] REFERENCE Figures 1 to 3 The utility model provides a kind of heat sealing and pressing bag cutting structure of bag making machine, comprising: knife holder 10, and heat sealing knife 20 and pressing plate 30 set in knife holder 10;
[0029] The pressing plate 30 is provided with two, interval setting in the opposite sides of the heat sealing knife 20;The lower end of the heat sealing knife 20 is " P " type structure, is provided with transition groove 21;The cutting knife fixed plate 40 is detachably arranged in the transition groove 21;The tooth cutting knife 50 is detachably installed on the cutting knife fixed plate 40;The lower end surface of the tooth cutting knife 50 is lower than the lower end surface of the heat sealing knife 20.
[0030] In the utility model, the innovative structure design of the " P " type heat sealing knife 20 and tooth cutting knife 50 significantly optimizes the reliability of the hot melt cutting and sealing process.Specifically, the pressing plate 30 is pressed tightly on both sides of the heat sealing knife 20, and the design that the lower end surface of the tooth cutting knife 50 is lower than the heat sealing knife 20 makes the cutting action prior to the heat sealing contact, and the intermittent contact of the tooth-shaped blade is used to cut the biodegradable bag, the cutting process is physical cutting, and the tooth cutting knife 50 does not need to be heated, which is not through the hot melt cutting mode, and the cutting knife is not easy to adhere to the molten plastic, so that the service life of the cutting knife can be effectively prolonged.
[0031] In the embodiment, through the layered design of the " P " type heat sealing knife 20 and tooth cutting knife 50, the tooth cutting knife 50 preferentially contacts the plastic film to complete cutting, and then the heat sealing knife 20 performs edge sealing, avoiding double adhesion of molten plastic on a single blade surface. The difference between the lower end surface of the tooth cutting knife 50 and the heat sealing knife 20 ensures that the cutting and heat sealing action timing is separated, reduces the contact time of the cutting tool and the material by more than 30%, and the transition groove 21 guides the molten material to flow to both sides, reducing the probability of forming a carbonized layer. The detachable cutting knife fixed plate 40 realizes quick replacement and reduces maintenance downtime.
[0032] Specifically, the cutting knife fixed plate 40 is in the form of an inverted " U " shaped clamp, and the tooth cutting knife 50 is clamped in the cutting knife fixed plate 40. The inverted U-shaped structure uniformly fixes the tooth cutting knife 50 through the clamping force on both sides, and the cutting knife can be conveniently clamped and fixed.
[0033] Further, the tooth cutting knife 50 and the cutting knife fixed plate 40 are provided with matching bolt limiting holes 51. Through the cooperation of high-precision positioning bolts and limiting holes, the parallelism error of the tooth cutting knife 50 after installation and the heat sealing knife 20 is ensured, and the micro displacement of the cutting tool under the action of shearing force is limited, so that the cutting error caused by vibration is avoided. The bolt pre-tightening force adjusting mechanism adapts to the cutting reaction force requirement of different thickness materials.
[0034] In the embodiment, the tooth cutting knife 50 is provided with cutting teeth on both upper and lower ends. The tooth cutting knife 50 is provided with cutting teeth on both upper and lower ends, which can be used by turning over the tool body when one end is worn out, so that the service life of the cutting tool is significantly improved.
[0035] In the embodiment, the hot sealing knife 20 is provided with a cloth fixing support 60 at both ends; the cloth fixing support 60 is provided with a cloth winding roller 61 at the upper part; and the cutting knife fixing plate 40 is detachably arranged on the cloth fixing support 60. The cloth is used to wrap the hot sealing knife 20 to prevent the hot sealing knife 20 from sticking to the bag body, and needs to be replaced every certain period of time. The cutting knife fixing plate 40 is detachably arranged on the cloth fixing support 60, and can be arranged below the transition groove 21 after the cloth is wound, so that the cutting knife is located below the hot sealing knife 20 and the cloth and does not contact the cloth.
[0036] In the embodiment, the hot sealing knife 20 is connected to the knife holder 10 through a first guide column 70; and the first guide column 70 is provided with a first buffer elastic structure 71. The first buffer elastic structure 71 provides a buffer force when the hot sealing knife 20 is pressed down, offsets the impact caused by the thickness fluctuation of the material, and prevents the plastic from being crushed due to the over-pressing of the hot sealing knife 20. The first buffer elastic structure 71 is a buffer spring arranged above or on the side of the first guide column 70.
[0037] In the embodiment, the pressing plate 30 is connected to the knife holder 10 through a second guide column 80; and the second guide column 80 is provided with a second buffer elastic structure 81. The second buffer elastic structure 81 provides a buffer force when the pressing plate 30 is pressed down, offsets the impact caused by the thickness fluctuation of the material, and prevents the plastic from being crushed due to the over-pressing of the pressing plate 30. The second buffer elastic structure 81 is a buffer spring arranged above or on the side of the second guide column 80.
[0038] Specifically, in order to facilitate the heat dissipation of the hot sealing knife 20, the pressing plate 30 is provided with a plurality of heat dissipation holes 31.
[0039] Preferably, the heat dissipation holes 31 are vertically arranged elliptical hole structures. The long axis of the elliptical hole structure is vertically arranged, which facilitates the release of vertical pressure, reduces the local stress of the pressing plate 30, reduces the weight and heat dissipation of the pressing plate 30, and ensures the sufficient vertical strength of the pressing plate 30.
[0040] In the embodiment, the lower part of the knife holder 10 is provided with a pressing base; the pressing base is provided with an avoiding breaking groove; and the tooth cutting knife 50 can extend into the avoiding breaking groove. The two sides of the knife holder 10 are provided with connecting seats for connecting vertical driving structures, so that the knife holder 10 moves up and down along the vertical direction.
[0041] In the embodiment, the hot sealing knife 20, the cutting knife and the pressing plate 30 are provided with multiple groups, so that multiple biodegradable bag flow lines can be simultaneously subjected to the hot sealing and cutting operation.
[0042] Of course, the utility model is not limited to the above-mentioned embodiment, and those skilled in the art can make equivalent transformation or replacement without departing from the spirit of the utility model, and these equivalent transformations and replacements are all included in the range defined by the claims of the present application.
Claims
1. A heat-sealing, pressing, and cutting bag structure for a bag-making machine, characterized in that, include: Tool holder (10), and heat sealing knife (20) and pressure plate (30) disposed on the tool holder (10); Two pressure plates (30) are provided, spaced apart on opposite sides of the heat sealing knife (20); the lower end of the heat sealing knife (20) has a "П" shaped structure and a transition groove (21); a cutter fixing plate (40) is detachably provided in the transition groove (21); a toothed cutter (50) is detachably installed on the cutter fixing plate (40); the lower end face of the toothed cutter (50) is lower than the lower end face of the heat sealing knife (20).
2. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The cutter fixing plate (40) is in the shape of an inverted "U" clamp, and the toothed cutter (50) is clamped on the cutter fixing plate (40).
3. The heat-sealing and pressing bag-cutting structure of the bag-making machine according to claim 2, characterized in that: The toothed cutter (50) and the cutter fixing plate (40) are provided with matching bolt limiting holes (51).
4. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The toothed cutter (50) has cutting teeth at both its upper and lower ends.
5. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The heat sealing knife (20) is provided with ironing cloth fixing brackets (60) at both ends; the ironing cloth fixing brackets (60) are provided with ironing cloth rolling rollers (61) on the upper part; the cutter fixing plate (40) is detachably provided on the ironing cloth fixing brackets (60).
6. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The heat sealing knife (20) is connected to the knife holder (10) via a first guide post (70); the first guide post (70) is provided with a first buffer elastic structure (71).
7. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The pressure plate (30) is connected to the tool holder (10) via the second guide post (80); the second guide post (80) is provided with a second buffer elastic structure (81).
8. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: The pressure plate (30) has several heat dissipation holes (31).
9. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 8, characterized in that: The heat dissipation holes (31) are arranged in a vertically elliptical hole structure.
10. The heat-sealing, pressing, and cutting bag structure of the bag-making machine according to claim 1, characterized in that: A pressing base is provided below the tool holder (10); the pressing base has an avoidance groove; the toothed cutter (50) can extend into the avoidance groove.