High-precision low-pressure heat sealing mechanism for biodegradable film

Abstract

The utility model relates to the technical field of biodegradable film processing, in particular to a biodegradable film high-precision low-pressure heat sealing mechanism which comprises a heat sealing assembly, a pressing assembly and a driving assembly. The press-fit assembly comprises a press-fit end socket and a flexible press-fit block, an assembling groove is formed in the press-fit face, facing the heat sealing assembly, of the press-fit end socket, one end of the flexible press-fit block is connected into the assembling groove, and the other end of the flexible press-fit block extends out of the assembling groove; the pressing assembly is connected with the driving assembly so as to move in the direction of the heat sealing assembly under the driving effect of the driving assembly, and the multiple layers of biodegradable films placed between the heat sealing assembly and the pressing assembly are subjected to heat sealing. The flexible press-fit block is installed in the assembly groove of the press-fit seal head, heat-sealing treatment is conducted on the multiple layers of biodegradable films through cooperation of the flexible press-fit block and the hot-pressing seal head, constant pressure is provided through deformation of the flexible press-fit block, and therefore accurate control over press-fit force is achieved, the heat-sealing effect is good, and sealing is firm.

Description

Technical Field

[0001] The utility model relates to the technical field of biodegradable film processing, and more specifically to a high-precision low-pressure heat-sealing mechanism for biodegradable films. Background Art

[0002] Biodegradable films are widely used in packaging and single-use products such as shopping bags, garbage bags, and food packaging. Heat sealing is the process of combining two or more layers of film through heat and pressure. Heat sealing of biodegradable films requires the use of a heat-sealing mechanism to seamlessly seal the two or more layers, ensuring the seal quality and the performance of the biodegradable material.

[0003] The heat sealing mechanism in the existing technology cannot reasonably exert downward pressure during the heat sealing process of the biodegradable film, which affects the heat sealing effect; if the downward pressure is too small, the heat sealing temperature is not enough, and the multi-layer film cannot be fully melted, which easily leads to problems such as air leakage and loose sealing; if the downward pressure is too large, it is easy to cause the temperature to be too high. Due to the material of the biodegradable film, the melt will be squeezed out if the temperature is too high, and the hot-melt part is prone to over-melting and easy to be pulled apart, which also affects the quality of the finished product. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-precision, low-pressure heat-sealing mechanism for a biodegradable film.

[0005] The technical solution adopted in this utility model is:

[0006] The high-precision, low-pressure heat-sealing mechanism for biodegradable films comprises: a heat-sealing component, a pressing component and a driving component; the pressing component comprises: a pressing head and a flexible pressing block; the pressing head is provided with an assembly groove on the pressing surface facing the heat-sealing component, one end of the flexible pressing block is connected to the assembly groove, and the other end of the flexible pressing block extends to the outside of the assembly groove; the pressing component is connected to the driving component so as to move toward the heat-sealing component under the driving action of the driving component, thereby heat-sealing the multi-layer biodegradable film placed between the heat-sealing component and the pressing component.

[0007] Furthermore, the flexible pressing block is made of high temperature resistant rubber.

[0008] Furthermore, the assembly groove is a T-shaped groove, and the upper end of the flexible pressing block is connected in the T-shaped groove by interference fit.

[0009] Furthermore, the press-fitting head is threadedly connected with a fastening bolt, and the fastening bolt abuts against the upper surface of the flexible press-fitting block.

[0010] Furthermore, the press-fit head is made of steel.

[0011] Furthermore, the heat sealing assembly includes: a heat pressing head installed on a workbench, a heat sealing knife installed in a workpiece groove on an upper surface of the heat pressing head, and the heat sealing knife is arranged opposite to the flexible pressing block.

[0012] Furthermore, it also includes: a buffer component; the buffer component includes: a guide slide shaft, multiple guide slide shafts are fixed on the side surface of the pressing head away from the flexible pressing block, the middle parts of the multiple guide slide shafts are slidably connected to the connecting frame, and the guide slide shaft is located between the pressing head and the connecting frame and is sleeved with an elastic buffer part on the axis; the connecting frame is connected to the drive component; the ends of the multiple guide slide shafts away from the pressing head are all connected to the limiting block.

[0013] Furthermore, the limiting block includes: a limiting nut clamped on the side of the connecting frame away from the press-fit head, and the limiting nut is threadedly connected to the external thread structure of the guide sliding shaft.

[0014] Furthermore, the driving assembly includes: a sliding bracket connected to the pressing assembly, the sliding bracket is slidably arranged in the middle of multiple columns, the top and bottom of the multiple columns are respectively connected to the limiting upper plate and the workbench, and the column body of the column located between the limiting upper plate and the workbench is provided with a reset lifting compression spring; the upper surface of the sliding bracket is in rolling cooperation with the wheel surface of the eccentric wheel, and the eccentric hole of the eccentric wheel is fixedly connected to the output shaft of the power motor installed on the workbench.

[0015] Furthermore, a rubber buffer pad is provided on the contact surface between the limiting upper plate and the sliding bracket.

[0016] It can be seen from the above scheme that the beneficial effects of the utility model are:

[0017] The utility model discloses a high-precision low-pressure heat-sealing mechanism for biodegradable films. A flexible pressing block is installed in an assembly groove of a pressing head. The multi-layer biodegradable film is heat-sealed by the cooperation of the flexible pressing block and the hot pressing head. The constant pressure is provided by the deformation of the flexible pressing block, thereby realizing precise control of the pressing force, solving the problem of poor heat-sealing effect caused by insufficient or excessive heat-sealing temperature due to unstable downward pressure. The biodegradable film heat-sealed by the utility model has a good heat-sealing effect and a firm seal.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 The overall schematic diagram provided for the embodiment of the utility model Figure 1 ;

[0021] Figure 2 The overall schematic diagram provided for the embodiment of the utility model Figure 2 ;

[0022] Figure 3 A schematic structural diagram of a press-fit head provided in an embodiment of the present utility model;

[0023] Figure 4 A schematic structural diagram of a buffer assembly provided in an embodiment of the present utility model;

[0024] Figure 5 A schematic structural diagram of a drive assembly provided in an embodiment of the present utility model.

[0025] Icons: heat sealing assembly 1; hot pressing head 11; heat sealing knife 12; pressing assembly 2; pressing head 21; flexible pressing block 22; driving assembly 3; sliding bracket 31; column 32; limiting upper plate 33; reset lifting spring 34; eccentric wheel 35; power motor 36; buffer assembly 4; guide slide shaft 41; connecting frame 42; elastic buffer 43; limiting block 44; workbench 5. DETAILED DESCRIPTION

[0026] In order to clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings, it is obvious that the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0028] See also Figure 1-5 The utility model provides a high-precision, low-pressure heat-sealing mechanism for biodegradable films, comprising: a heat-sealing component 1, a pressing component 2 and a driving component 3; the pressing component 2 comprises: a pressing head 21 and a flexible pressing block 22, the pressing head 21 is provided with an assembly groove on the pressing surface facing the heat-sealing component 1, one end of the flexible pressing block 22 is connected to the assembly groove, and the other end of the flexible pressing block 22 extends to the outside of the assembly groove; the pressing component 2 is connected to the driving component 3, so as to move toward the direction of the heat-sealing component 1 under the driving action of the driving component 3, so as to heat-seal the multi-layer biodegradable film placed between the heat-sealing component 1 and the pressing component 2; the heat-sealing component 1 comprises: a heat-sealing head 11 installed on a workbench 5, a heat-sealing knife 12 is installed in the workpiece groove on the upper surface of the heat-sealing head 11, and the heat-sealing knife 12 is arranged opposite to the flexible pressing block 22.

[0029] The high-precision low-pressure heat-sealing mechanism for biodegradable films of the present invention places the biodegradable film to be heat-sealed between the heat-sealing component 1 and the pressing component 2 when heat-sealing the multi-layer biodegradable film. Then, the heat-sealing component 1 is turned on to heat the heat-pressing sealing head 11 to a preset temperature. The driving component 3 is then started, and the driving component 3 controls the pressing head 21 to move toward the heat-pressing sealing head 11. The multi-layer biodegradable film is heat-sealed by the cooperation of the flexible pressing block 22 and the heat-pressing sealing head 11. During the downward heat-sealing process, the flexible pressing block 22 first abuts against the biodegradable film. As the pressing continues, the flexible pressing block 22 is continuously squeezed and deformed. After the extrusion deformation is overcome, the pressing head 21 contacts the upper surface of the hot pressing head 11, thereby preventing further downward pressure, so that the pressure applied to the biodegradable film between the flexible pressing block 22 and the heat sealing knife 12 is the constant force provided by the deformation of the flexible pressing block 22, thereby achieving precise control of the downward pressure, controlling the downward pressure intensity to be stable, so that the heat sealing temperature meets the actual heat sealing requirements, ensuring the quality of the biodegradable film after heat sealing, good heat sealing effect, and firm sealing; and different flexible pressing blocks 22 can be replaced according to different situations. The lengths of different flexible pressing blocks 22 extending to the outside of the assembly groove are different, thereby adjusting the downward pressure to meet the heat sealing requirements of different biodegradable films.

[0030] The flexible pressing block 22 is made of high-temperature resistant rubber, has good high-temperature resistance, and has a certain elastic deformation, which fully meets the construction requirements of the present utility model.

[0031] The assembly groove is a T-shaped groove, and the upper end of the flexible pressing block 22 is connected in the T-shaped groove by interference fit. This structural arrangement makes the flexible pressing block 22 easy to install or disassemble and replace.

[0032] The pressing head 21 is threadedly connected with a fastening bolt, which contacts the upper surface of the flexible pressing block 22. The setting of the fastening bolt is conducive to improving the stability of the flexible pressing block 22 installed in the pressing head 21, reducing the probability of loosening and displacement of the pressing head 21 during use, and ensuring the accuracy of the heat sealing position.

[0033] The press-fit head 21 is made of steel and has high structural strength and good stability.

[0034] The high-precision, low-pressure heat sealing mechanism for biodegradable films also includes: a buffer component 4; the buffer component 4 includes: a guide slide shaft 41, multiple guide slide shafts 41 are fixed on the side surface of the pressing head 21 away from the flexible pressing block 22, the middle parts of the multiple guide slide shafts 41 are slidably connected to the connecting frame 42, and the guide slide shaft 41 is located between the pressing head 21 and the connecting frame 42. An elastic buffer part 43 is sleeved on the axis body; the connecting frame 42 is connected to the driving component 3; the ends of the multiple guide slide shafts 41 away from the pressing head 21 are all connected to the limiting block 44.

[0035] After the driving component 3 is started, the driving component 3 drives the connecting frame 42 to move in the direction of the heat sealing component 1. After the flexible pressing block 22 contacts the biodegradable film, as the driving component 3 continues to move, the connecting frame 42 slides on the multiple guide slides 41 and compresses the multiple elastic buffers 43. The elastic buffers 43 are preferably compression springs, which play a buffering role. After the elastic buffers 43 are completely compressed, the connecting frame 42 applies pressure to the pressing head 21 through the elastic buffers 43, so that the pressing head 21 applies pressure to the flexible pressing block 22. At this time, the flexible pressing block 22 is in stable contact with the biodegradable film, and will not be displaced or cause impact damage to the biodegradable film, which is more conducive to improving the heat sealing effect and heat sealing stability.

[0036] The limit block 44 includes: a limit nut clamped on the side of the connecting frame 42 away from the pressing head 21, the limit nut is threadedly connected to the external thread structure of the guide slide shaft 41, and the setting of the limit nut is used to prevent the connecting frame 42 from separating from the guide slide shaft 41.

[0037] The drive assembly 3 includes a sliding bracket 31 connected to the pressing assembly 2. The sliding bracket 31 is slidably mounted in the middle of multiple columns 32. The top and bottom of the multiple columns 32 are respectively connected to the limit plate 33 and the workbench 5. The columns 32, located between the limit plate 33 and the workbench 5, are equipped with reset and lifting springs 34. The upper surface of the sliding bracket 31 rolls against the wheel surface of an eccentric wheel 35. The eccentric hole of the eccentric wheel 35 is fixedly connected to the output shaft of a power motor 36 mounted on the workbench 5. A rubber cushion is provided on the contact surface between the limit plate 33 and the sliding bracket 31.

[0038] After the power motor 36 is started, it can drive the eccentric wheel 35 to rotate around the axis of the output shaft of the power motor 36. Since the eccentric hole of the eccentric wheel 35 is connected to the output shaft of the power motor 36, when the wheel surface farther away from the output shaft of the power motor 36 gradually moves to contact the upper surface of the sliding bracket 31, it can press and drive the sliding bracket 31 to slide downward on the multiple columns 32 and compress the reset lifting spring 34. At this time, the sliding bracket 31 drives the buffer assembly 4 and the pressing assembly 2 to move in the direction of the heat sealing assembly 1 to achieve heat sealing processing. When the wheel surface closer to the output shaft 36 gradually moves to contact the upper surface of the sliding bracket 31, the sliding bracket 31 is reset under the elastic force of the reset top compression spring 34, and the sliding bracket 31 slides upward on the multiple columns 32 and drives the buffer component 4 and the pressing component 2 to move in the direction away from the heat sealing component 1, so as to facilitate the heat sealing process again after the installation of the biodegradable film. A rubber buffer pad is provided on the contact surface between the limiting upper plate 33 and the sliding bracket 31, so that the impact force of the sliding bracket 31 on the limiting upper plate 33 after the reset is buffered, thereby reducing the impact of vibration on the utility model and reducing noise.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0040] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. High-precision low-pressure heat sealing mechanism for biodegradable membranes, characterized by: include: Heat sealing assembly (1), pressing assembly (2) and driving assembly (3); The pressing assembly (2) comprises: a pressing head (21) and a flexible pressing block (22); the pressing head (21) is provided with an assembly groove on a pressing surface facing the heat sealing assembly (1); one end of the flexible pressing block (22) is connected to the assembly groove, and the other end of the flexible pressing block (22) extends to the outside of the assembly groove; the pressing assembly (2) is connected to the driving assembly (3) so as to move toward the heat sealing assembly (1) under the driving action of the driving assembly (3) to heat-seal the multi-layer biodegradable film placed between the heat sealing assembly (1) and the pressing assembly (2).

2. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The flexible pressing block (22) is made of high-temperature resistant rubber.

3. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The assembly groove is a T-shaped groove, and the upper end of the flexible pressing block (22) is connected in the T-shaped groove through interference fit.

4. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 3, characterized in that: The press-fitting head (21) is threadedly connected with a fastening bolt, and the fastening bolt contacts the upper surface of the flexible press-fitting block (22).

5. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The pressed seal head (21) is made of steel.

6. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The heat sealing assembly (1) comprises: a heat sealing head (11) mounted on a workbench (5); a heat sealing knife (12) is mounted in a workpiece groove on the upper surface of the heat sealing head (11); and the heat sealing knife (12) is arranged opposite to a flexible pressing block (22).

7. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: Also includes: Buffer assembly (4); The buffer assembly (4) comprises: a guide slide shaft (41); a plurality of guide slide shafts (41) are fixed on a side surface of the pressing head (21) away from the flexible pressing block (22); the middle parts of the plurality of guide slide shafts (41) are slidably connected to the connecting frame (42); an elastic buffer member (43) is sleeved on the shaft body of the guide slide shaft (41) located between the pressing head (21) and the connecting frame (42); the connecting frame (42) is connected to the driving assembly (3); and the ends of the plurality of guide slide shafts (41) away from the pressing head (21) are all connected to the limiting block (44).

8. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 7, characterized in that: The limiting block (44) comprises a limiting nut which is clamped on the side of the connecting frame (42) away from the pressing head (21), and the limiting nut is threadedly connected to the external thread structure of the guide sliding shaft (41).

9. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The driving assembly (3) comprises: a sliding bracket (31) connected to the pressing assembly (2), the sliding bracket (31) being slidably arranged in the middle of a plurality of columns (32), the tops and bottoms of the plurality of columns (32) being respectively connected to a limit upper plate (33) and a workbench (5), and a reset jacking compression spring (34) being sleeved on the column body of the column (32) located between the limit upper plate (33) and the workbench (5); the upper surface of the sliding bracket (31) is in rolling engagement with the wheel surface of the eccentric wheel (35), and the eccentric hole of the eccentric wheel (35) is fixedly connected to the output shaft of a power motor (36) mounted on the workbench (5).

10. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 9, characterized in that: A rubber buffer pad is provided on the contact surface between the limiting upper plate (33) and the sliding bracket (31).

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