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

Abstract

The application relates to the technical field of biodegradable film processing, in particular to a biodegradable film high-precision low-pressure heat sealing mechanism and a heat sealing method, which comprises an upper heat sealing punch part and a lower heat sealing punch part arranged oppositely, and a driving part used for driving the upper heat sealing punch part to be close to or far away from the lower heat sealing punch part; the upper heat sealing punch part comprises an upper punch seat connected with the driving part and an elastic compression body connected with the upper punch seat; the lower heat sealing punch part comprises a lower punch seat arranged on a processing table and a heat sealing cutter connected with the lower punch seat, and the heat sealing cutter is arranged right below the elastic compression body. The elastic compression body with different amplitude compression deformation is arranged, the pressure during heat sealing is adjusted, the accurate control of the heat sealing pressure is realized, and the heat sealing effect of the biodegradable film is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of biodegradable film processing, and more particularly to a high-precision low-pressure heat-sealing mechanism and a heat-sealing method for biodegradable film. Background Art

[0002] Heat sealing of biodegradable films requires the use of a heat-sealing mechanism to seamlessly seal two or more layers of film, ensuring the quality of the seal and the performance of the biodegradable material. Existing heat-sealing mechanisms fail to apply adequate downward pressure during the heat-sealing process. If the downward pressure is too low, the heat-sealing temperature is insufficient, preventing the multi-layer film from fully melting, leading to air leakage and a loose seal. If the downward pressure is too high, the temperature can rise too high. Due to the material of the biodegradable film, excessively high temperatures can cause the melt to escape, and the hot-melt portion can easily overmelt and break, also affecting the quality of the finished product. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a high-precision, low-pressure heat-sealing mechanism and a heat-sealing method for a biodegradable film.

[0004] The technical solution adopted in the present invention is:

[0005] The high-precision, low-pressure heat-sealing mechanism for biodegradable film comprises: an upper heat-sealing head component and a lower heat-sealing head component that are arranged in relative cooperation, and a driving component for driving the upper heat-sealing head component to approach or move away from the lower heat-sealing head component; the upper heat-sealing head component comprises: an upper head seat connected to the driving component, and an elastic compression body connected to the upper head seat; the lower heat-sealing head component comprises: a lower head seat arranged on a processing table, and a heat-sealing knife connected to the lower head seat, and the heat-sealing knife is arranged directly below the elastic compression body; when the driving component drives the upper heat-sealing head component to approach the lower heat-sealing head component so that the elastic compression body reaches a preset compression amplitude, the upper head seat and the lower head seat are respectively pressed onto the two side surfaces of the biodegradable film to reach a preset heat-sealing pressure.

[0006] Furthermore, a sensor is provided on the lower pressure head seat. When the sensor detects that the upper pressure head seat is in contact with the biodegradable film, a signal is sent to the controller, and the controller controls the driving component to stop driving the upper heat sealing pressure head component to approach the lower heat sealing pressure head component.

[0007] Furthermore, the elastic compression body is a strip-shaped compression block made of high-temperature resistant rubber.

[0008] Furthermore, the top surface of the strip-shaped pressing block is installed in the open groove on the lower surface of the upper pressing head seat, and the bottom surface of the strip-shaped pressing block is connected to a heat-insulating pressing plate arranged to cooperate with the heat-sealing knife.

[0009] Furthermore, the upper pressure head seat includes: an upper seat body connected to the driving component, a regulating slide is slidably provided in the regulating slide groove at the bottom of the upper seat body, the regulating slide is connected to one end of the elastic compression body that slides into the regulating slide groove, two regulating screws rotated on the regulating slide are threaded into the internal threaded holes at the top of the upper seat body, and the inner ends of the two anti-loosening screws threaded on the upper seat body are in contact with the two regulating screws.

[0010] Furthermore, two side slide grooves connected to the regulating slide groove are provided at the bottom of the upper seat body, and pre-stressing slides are slidably provided in the two side slide grooves, and the two pre-stressing slides are relatively slidably on both sides of the regulating slide and the elastic compression body, and the horizontal height of the lower surfaces of the two pre-stressing slides is lower than the horizontal height of the lower surface of the elastic compression body; the sliders fixed to the outside of the two pre-stressing slides are slid on both sides of the open slide groove in the middle of the top of the upper seat body; the two sliders are respectively connected to the bottoms of multiple vertical shafts, and the middle parts of the multiple vertical shafts are slid in the vertical through holes of the T-frame, and the clamping rings at the tops of the multiple vertical shafts are clamped on the upper surface of the T-frame, and a tensioning spring is sleeved on the shaft body of the vertical shaft between the T-frame and the slider; the T-frame is fixed in the middle of the upper surface of the regulating slide and is passed through the open slide groove.

[0011] Furthermore, the outer end of the slider is connected to one or more first pressure components connected to the outer slide groove of the upper seat body, and the first pressure component includes: a force transmission inclined rod rotated on the slider, the end of the force transmission inclined rod away from the slider is rotated to the upper end of the pressure slide, the pressure slide slid in the outer slide groove of the upper seat body is connected to one end of the first pressure spring, and the other end of the first pressure spring is connected to the spring seat installed in the outer slide groove of the upper seat body.

[0012] Furthermore, the spring seat includes: a vertical seat body connected to the first pressure spring, the vertical seat body is fixed on the upper rack, the middle part of the upper rack is slid on the force-bearing seat, and a compression spring is fixed between the stop block at the outer end of the upper rack and the force-bearing seat; the lower part of the upper rack is engaged with the gear rotated on the force-bearing seat, and when the pre-compression slide slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body, the lower part of the gear is engaged with the lower rack fixed on the pressure slide.

[0013] Furthermore, a second pressure spring is fixedly provided on the vertical seat body, and a gap is provided between the second pressure spring and the pressure slide seat. When the pre-compression slide slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body, the second pressure spring abuts and fits on the pressure slide seat; the force-bearing seat is slid in the outer slide groove of the upper seat body, and the force-bearing seat is threadedly connected to the pressure-adjusting screw, and the pressure-adjusting screw is rotated on the fixed block in the outer slide groove.

[0014] Furthermore, the top of the upper seat is connected to the driving component through a hot-pressing buffer component, and the hot-pressing buffer component includes: a guide slide shaft, multiple guide slide shafts are fixed on the upper seat body, the middle parts of multiple guide slide shafts are slidably connected to the connecting frame, and the guide slide shaft is located between the upper seat body and the connecting frame and is sleeved with an elastic buffer member; the connecting frame is connected to the driving component; the ends of the multiple guide slide shafts away from the upper seat body are connected to a limit block for being clamped above the connecting frame.

[0015] A heat sealing method, applied to the biodegradable film high-precision low-pressure heat sealing mechanism, comprises the following steps:

[0016] Placing the multi-layer biodegradable film to be heat-sealed on the lower heat-sealing head component, and positioning the multi-layer biodegradable film between the lower heat-sealing head component and the upper heat-sealing head component;

[0017] Open the heat sealing knife and driving components in the lower heat sealing head component;

[0018] The driving component drives the upper heat-sealing pressure head component to approach the lower heat-sealing pressure head component, thereby performing heat-sealing and pressing processing on the multi-layer biodegradable film through the cooperation of the elastic compression body and the heat-sealing knife;

[0019] When the driving component drives the upper heat-sealing head component close to the lower heat-sealing head component so that the elastic compression body reaches a preset compression amplitude, the upper head seat and the lower head seat are respectively pressed on the two side surfaces of the biodegradable film to reach the preset heat-sealing pressure, thereby completing the heat sealing of the multi-layer biodegradable film.

[0020] As can be seen from the above scheme, the beneficial effects of the present invention are:

[0021] The present invention provides a high-precision, low-pressure heat-sealing mechanism and heat-sealing method for biodegradable films. A heat-sealing knife is provided on a lower pressure head seat, and an elastic compression body for cooperating with the heat-sealing knife to perform top pressure heat-sealing on the biodegradable film is provided on an upper pressure head seat. The elastic compression body is provided with different compression deformation amplitudes, and the pressure during heat sealing is adjusted. When the driving component drives the upper heat-sealing pressure head component to approach the lower heat-sealing pressure head component so that the elastic compression body reaches a preset compression amplitude, the upper pressure head seat and the lower pressure head seat are respectively pressed onto the two side surfaces of the biodegradable film to reach the preset heat-sealing pressure, thereby realizing precise control of the heat-sealing pressure and effectively ensuring the heat-sealing effect of the biodegradable film.

[0022] 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

[0023] 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:

[0024] Figure 1 Overall schematic diagram of the first direction provided for the embodiment of the present application;

[0025] Figure 2 Overall schematic diagram of the second direction provided for the embodiment of the present application;

[0026] Figure 3 First direction schematic diagram of the upper heat-seal plunger component provided for the embodiment of the present application;

[0027] Figure 4 Second direction schematic diagram of the upper heat-seal plunger component provided for the embodiment of the present application;

[0028] Figure 5 Partial schematic diagram of the upper heat-seal plunger component provided for the embodiment of the present application;

[0029] Figure 6 Schematic diagram of the upper seat provided for the embodiment of the present application;

[0030] Figure 7 Schematic diagram of the first pressure component and spring seat provided for the embodiment of the present application Figure 1 ;

[0031] Figure 8 Schematic diagram of the first pressure component and spring seat provided for the embodiment of the present application Figure 2 ;

[0032] Figure 9 Schematic diagram of the lower heat-seal plunger component provided for the embodiment of the present application;

[0033] Figure 10 Schematic diagram of the heat-press buffer component provided for the embodiment of the present application;

[0034] Figure 11 Schematic diagram of the stability enhancement component provided for the embodiment of the present application.

[0035] Figure: upper heat-seal plunger component 1; lower heat-seal plunger component 2; driving component 3; upper plunger seat 4; upper seat 401; regulating sliding seat 402; regulating screw 403; pre-press sliding plate 404; sliding block 405; vertical shaft 406; T-shaped frame 407; tension spring 408; elastic compression body 5; lower plunger seat 6; heat-seal knife 7; first pressure component 8; force transmission inclined rod 801; pressure sliding seat 802; first pressure spring 803; spring seat 9; vertical seat 901; upper rack 902; force receiving seat 903; compression spring 904; gear 905; second pressure spring 906; pressure regulating screw 907; fixed block 908; heat-press buffer component 10; base 11; stability enhancement component 12; enhancement insertion plate 1201; contraction sliding sleeve 1202; push block 1203; compression spring 1204; rectangular guide rod 1205. DETAILED DESCRIPTION

[0036] In order to clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings below, it is obvious that the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] 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.

[0038] Example 1

[0039] See also Figure 1-11 The present invention provides a high-precision, low-pressure heat-sealing mechanism for a biodegradable film, comprising: an upper heat-sealing head component 1 and a lower heat-sealing head component 2 which are arranged in a relatively coordinated manner, and a driving component 3 for driving the upper heat-sealing head component 1 to approach or move away from the lower heat-sealing head component 2; the driving component 3 and the lower heat-sealing head component 2 are both installed on a base 11; the upper heat-sealing head component 1 comprises: an upper pressure head seat 4 connected to the driving component 3, and an elastic compression body 5 connected to the upper pressure head seat 4; the lower heat-sealing head component 2 comprises: a lower pressure head seat 6 arranged on a processing table, and a heat-sealing knife 7 connected to the lower pressure head seat 6, and the heat-sealing knife 7 is cooperatively arranged directly below the elastic compression body 5; when the driving component 3 drives the upper heat-sealing head component 1 to approach the lower heat-sealing head component 2 so that the elastic compression body 5 reaches a preset compression amplitude, the upper pressure head seat 4 and the lower pressure head seat 6 are respectively pressed on the two side surfaces of the biodegradable film to reach a preset heat-sealing pressure.

[0040] The working principle and technical effects of the above technical solution are as follows:

[0041] The present invention provides a high-precision low-pressure heat-sealing mechanism for biodegradable films. When heat-sealing a multi-layer biodegradable film that needs to be heat-sealed and pressed, the multi-layer biodegradable film to be heat-sealed is placed on the lower heat-sealing head component 2, and the multi-layer biodegradable film is located between the lower heat-sealing head component 2 and the upper heat-sealing head component 1. Then, the heat-sealing knife 7 in the lower heat-sealing head component 2 is turned on, so that the heat-sealing knife 7 is heated to a preset temperature, and then the driving component 3 is controlled to start, and the upper heat-sealing head component 1 is driven by the driving component 3 to approach the lower heat-sealing head component 2, so that the multi-layer biodegradable film is heat-sealed and pressed through the cooperation of the elastic compression body 5 and the heat-sealing knife 7; when the driving component 3 drives the upper heat-sealing head component 1 to approach the lower heat-sealing head component 2 so that the elastic compression body 5 reaches a preset compression amplitude, the preset compression amplitude is the maximum deformation of the elastic compression body. The upper pressure head seat 4 and the lower pressure head seat 6 are respectively pressed on the two side surfaces of the biodegradable film and prevent further downward pressure. At this time, the preset heat sealing pressure is reached, and the heat sealing of the multi-layer biodegradable film is completed. The present invention can realize the precise control of the heat sealing pressure and effectively ensure the heat sealing effect of the biodegradable film; the pressure applied to the biodegradable film between the elastic compression body 5 and the heat sealing knife 7 is the constant force provided by the deformation of the heat sealing knife 7, which effectively realizes the precise control of the downward pressure, and different elastic compression bodies 5 can be replaced according to different situations to meet the heat sealing requirements of different biodegradable films; in the present invention, the driving component 3 adopts equipment purchased on the market, which has the function of controlling the upper heat sealing head component 1 to approach or move away from the lower heat sealing head component 2, such as: a cylinder or an electric telescopic rod. The corresponding equipment can be selected according to actual needs, and no further details will be given here.

[0042] A sensor is provided on the lower pressure head seat 6. When the sensor detects that the upper pressure head seat 4 is in contact with the biodegradable film, a signal is sent to the controller. The controller controls the driving component 3 to stop driving the upper heat sealing head component 1 to approach the lower heat sealing head component 2, to prevent the driving component 3 from continuing to apply pressure to cause damage to the upper heat sealing head component 1 and the lower heat sealing head component 2.

[0043] The elastic compression body 5 is a strip-shaped compression block made of high-temperature resistant rubber, which has good high-temperature resistance and its elastic deformation can meet the requirements of hot pressing.

[0044] The top surface of the strip pressing block is installed in the open groove on the lower surface of the upper pressing head seat 4, and the bottom surface of the strip pressing block is connected to a heat-insulating pressing plate arranged in correspondence with the heat-sealing knife 7. After the strip pressing block is compressed and deformed and completely retracted into the open groove on the lower surface of the upper pressing head seat 4, the lower surface of the upper pressing head seat 4 and the upper surface of the lower pressing head seat 6 respectively contact the two side surfaces of the biodegradable film. At this time, the biodegradable film is heat-sealed under the preset heat-sealing pressure; the bottom surface of the strip pressing block is connected to a heat-insulating pressing plate arranged in correspondence with the heat-sealing knife 7. The heat-insulating pressing plate and the heat-sealing knife 7 cooperate to heat-seal the biodegradable film. Compared with the heat-sealing of the biodegradable film by the strip pressing block made of rubber and the heat-sealing knife, It has the following advantages: 1. It is conducive to improving the uniformity of heat sealing. The cooperation between the heat-insulating pressure plate and the heat-sealing knife can more accurately control the heat-sealing position and ensure the uniformity of the heat-sealing seam. Through the heat-insulating pressure plate, stable heat-sealing conditions can be maintained during the heat-sealing process, thereby improving the consistency and reliability of heat sealing. 2. It reduces the deformation effect of high temperature on the strip rubber pressing block. The heat-insulating performance of the heat-insulating pressure plate can reduce the heat conduction of high temperature to the strip rubber pressing block and reduce the deformation risk of rubber at high temperature. It reduces the deformation and wear of the rubber pressing block and extends its service life without affecting the deformation amount of the rubber pressing block, thereby ensuring that a constant force can always be provided during heat sealing without affecting the precise control of pressure.

[0045] Example 2

[0046] See also Figure 1-11 The upper pressure head seat 4 includes: an upper seat body 401 connected to the driving component 3, a regulating slide 402 is slidably provided in the regulating slide groove at the bottom of the upper seat body 401, the regulating slide 402 is connected to one end of the elastic compression body 5 that slides into the regulating slide groove, and the two regulating screws 403 rotated on the regulating slide 402 are screwed into the internal threaded holes at the top of the upper seat body 401, and the inner ends of the two anti-loosening screws screwed on the upper seat body 401 are in contact with the two regulating screws 403.

[0047] The working principle and technical effects of the above technical solution are as follows:

[0048] In a high-precision low-pressure heat sealing mechanism for a biodegradable film of the present invention, the regulating slide 402 is connected to one end of the elastic compression body 5 that slides into the regulating slide groove. The position of the regulating slide 402 in the regulating slide groove can be adjusted to adjust the length of the elastic compression body 5 extending out of the regulating slide groove, which is convenient for controlling when installing different elastic compression bodies 5 and meeting the installation requirements of different elastic compression bodies 5. When adjusting the position of the regulating slide 402 in the regulating slide groove, the two regulating screws 403 are rotated at the same time to change the connection between the two regulating screws 403 and the internal threaded hole at the top of the upper seat 401. When the adjusting member 402 is in the control position, the adjusting member 402 can be driven to slide in the control groove by touching the adjusting member 402. The operation is very convenient. Replacing the elastic compression body 5 with different compression amplitudes can meet the precise control of different heat sealing pressures. Whether the adjusting member 402 is adjusted is selected according to the actual situation. In addition, controlling the adjusting member 402 to slide out of the control groove at the bottom of the upper member 401 can also facilitate the installation of the elastic compression body 5, making the installation of the elastic compression body 5 easier to operate. The top of the elastic compression body 5 can be interference fit in the trapezoidal groove of the adjusting member 402, so as to facilitate the rapid replacement of the elastic compression body 5.

[0049] Example 3

[0050] See also Figure 1-11 The two cams 406 are connected to each other by a plurality of springs 407, and the springs 408 are connected to each other by a plurality of springs 408.

[0051] The working principle and technical effects of the above technical solution are as follows:

[0052] In a high-precision low-pressure heat-sealing mechanism for a biodegradable film of the present invention, pre-pressing slides 404 are slidably provided in the two side slide grooves at the bottom of the upper seat 401. The two pre-pressing slides 404 are relatively slidably provided on both sides of the regulating slide 402 and the elastic compression body 5. During heat sealing, the two pre-pressing slides 404 first contact the biodegradable film and press the biodegradable film against the lower pressure head seat 6. As the pressure continues to increase, the two pre-pressing slides 404 slide upward in the two side slide grooves, driving the two sliders 405 to slide on the multiple vertical shafts 406 and press the multiple tensioning strips. The tension spring 408 is compressed. The setting of the tension spring 408 is convenient for controlling the pre-pressing slide plate 404 to automatically slide down and reset under the action of elastic force after the heat sealing is completed. When the elastic compression body 5 contacts the biodegradable film, the pressing and heat sealing work is started. The horizontal height of the lower surface of the two pre-pressing slide plates 404 is lower than the horizontal height of the lower surface of the elastic compression body 5. It has the following advantages: first, the heat sealing position of the biodegradable film can be accurately controlled. During heat sealing, the horizontal height of the lower surface of the pre-pressing slide plate 404 is slightly lower than the horizontal height of the lower surface of the flexible pressure block, so that the two sides of the biodegradable film can be pressed together. The two pre-pressing slides 404 are pre-pressed on both sides of the film layer, and at this time, the biodegradable film that needs to be heat-sealed can be pressed and limited, which can accurately control the heat-sealing position of the biodegradable film and ensure that the heat-sealing knife 7 and the elastic compression body 5 can accurately heat-seal the heat-sealing position of the biodegradable film; secondly, to prevent the elastic compression body 5 from deforming to the side and affecting the heat-sealing accuracy, the two pre-pressing slides 404 on both sides limit the two sides of the elastic compression body 5, so that the elastic compression body 5 cannot deform toward the lower surface of the upper seat 401 during extrusion and pressing, which can reduce The wear caused by the contact between the regulating groove of the upper seat 401 and the elastic compression body 5, that is, the elastic compression body 5 slides in the regulating groove of the upper seat 401 after deformation and expansion, which easily increases the wear of the inner wall of the regulating groove on the elastic compression body 5, and can also prevent the width of the elastic compression body 5 from increasing, thereby increasing the width of the heat sealing position and affecting the accuracy of heat sealing; in the present invention, the setting of two pre-pressing slides 404 is also beneficial to reducing the offset of the compression deformation of the elastic compression body 5, thereby reducing the offset and deformation of the biodegradable film during the heat sealing process, and improving the accuracy and consistency of heat sealing.

[0053] Example 4

[0054] See also Figure 1-11 The outer end of the slider 405 is connected to one or more first pressure components 8 connected to the outer slide groove of the upper seat body 401. The first pressure component 8 includes: a force transmission oblique rod 801 rotated on the slider 405, and the end of the force transmission oblique rod 801 away from the slider 405 is rotated to the upper end of the pressure slide 802. The pressure slide 802 slidably mounted in the outer slide groove of the upper seat body 401 is connected to one end of the first pressure spring 803, and the other end of the first pressure spring 803 is connected to the spring seat 9 installed in the outer slide groove of the upper seat body 401.

[0055] The working principle and technical effects of the above technical solution are as follows:

[0056] In a high-precision, low-pressure heat-sealing mechanism for biodegradable films of the present invention, in order to further improve the stability of the pre-pressure slide 404 pressing the biodegradable film and reduce the probability of deviation during heat sealing of the biodegradable film, the above-mentioned structure is designed. When the slider 405 moves upward, it can drive one end of the force transmission inclined rod 801 to move upward, and the other end of the force transmission inclined rod 801 pushes the pressure slide 802 to slide outward in the outer slide groove of the upper seat body 401, thereby compressing the first pressure spring 803 between the pressure slide 802 and the spring seat 9. By setting the first pressure spring 803 and the tensioning spring 408, the stability of the pre-pressure slide 404 pressing the biodegradable film during heat sealing is improved.

[0057] Example 5

[0058] See also Figure 1-11 , the spring seat 9 includes: a vertical seat body 901 connected to the first pressure spring 803, the vertical seat body 901 is fixed on the upper rack 902, the middle part of the upper rack 902 is slid on the force seat 903, and a compression spring 904 is fixed between the stopper at the outer end of the upper rack 902 and the force seat 903; the lower part of the upper rack 902 is engaged with the gear 905 rotated on the force seat 903, and the pre-pressing slide 404 slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body 5, and the lower part of the gear 905 is engaged with the gear 905 fixed on the pressure slide 802 The lower rack 804 is engaged; a second pressure spring 906 is also fixed on the vertical seat body 901, and there is a gap between the second pressure spring 906 and the pressure slide 802. When the pre-compression slide 404 slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body 5, the second pressure spring 906 abuts and fits on the pressure slide 802; the force-bearing seat 903 is slid into the outer slide groove of the upper seat body 401, and the force-bearing seat 903 is threadedly connected to the pressure-adjusting screw 907, and the pressure-adjusting screw 907 is rotated onto the fixed block 908 in the outer slide groove.

[0059] The working principle and technical effects of the above technical solution are as follows:

[0060] The position of the stress seat 903 can be adjusted according to actual needs, and when adjusting, the pressure adjusting screw 907 is rotated to change the connection position of the stress seat 903, so as to control the sliding of the stress seat 903 in the outer sliding groove of the upper seat body 401, thereby changing the initial compression amplitude of the first compression spring 803, and changing the initial pre-pressing force of the pre-pressing slide plate 404, so as to adjust the pre-pressing force according to the characteristics of different materials, optimize the distribution of pressure in the biodegradable film, and improve the precision of heat sealing. When the strength of the biodegradable film is high and the thickness is thick, in order to enhance the heat sealing precision of the biodegradable film and prevent displacement of the biodegradable film, the pre-pressing force of the pre-pressing slide plate 404 can be further increased, and as the compression deformation amplitude of the elastic compression body 5 increases, the pre-pressing force of the pre-pressing slide plate 404 can be gradually increased, realizing automatic pressure adjustment of the pre-pressing force of the pre-pressing slide plate 404. Specifically, as the compression deformation amplitude of the elastic compression body 5 gradually increases, the distance of the sliding block 405 moving upward gradually increases, when the lower surface of the pre-pressing slide plate 404 slides upward in the side sliding groove to the same height as the lower surface of the elastic compression body 5, the gear 905 below is engaged with the lower rack 804 fixed on the pressing slide 802, at this time, as the pressure continues to be applied, the lower rack 804 moves outward to engage the gear 905 to rotate, the gear 905 engages the upper rack 902 to drive the upper rack 902 to move on the stress seat 903 to the direction of the pressing slide 802, so that the second compression spring 906 is in abutting engagement on the pressing slide 802, and the second compression spring 906 is gradually compressed, thereby increasing the pre-pressing force, and when the upper rack 902 moves on the stress seat 903 to the direction of the pressing slide 802, the compression spring 904 is also compressed, which is used for resetting the upper rack 902 and can also be used to increase the pre-pressing force.

[0061] During the heat sealing process, the biodegradable film on both sides of the heat sealing position is pressed tightly by the pre-pressing slide plate 404 on both sides, and the pressing force on both sides of the heat sealing position is continuously increased, which can make the film on both sides of the heat sealing position better adhere to the heat sealing knife, and ensure that heat can be uniformly transmitted to the entire film layer, thereby optimizing the heat sealing effect. By increasing the pressing force, the temperature and pressure conditions during the heat sealing process can be better controlled, and the quality and consistency of the heat sealing seam can be improved; and increasing the pressing force can better adapt to the characteristics of different materials, especially for thicker or less heat-sealable materials, increasing the pressing force can improve the success rate of heat sealing

[0062] The top of the upper body 401 is connected to the driving component 3 through a hot pressing buffer component 10. The hot pressing buffer component 10 includes: a guide slide shaft, multiple guide slide shafts are fixed on the upper body 401, the middle parts of the multiple guide slide shafts are slidably connected to the connecting frame, and the guide slide shafts are located between the upper body 401 and the connecting frame. An elastic buffer is sleeved on the shaft body; the connecting frame is connected to the driving component 3; the ends of the multiple guide slide shafts away from the upper body 401 are connected to a limit block for being clamped above the connecting frame. When performing heat sealing and pressing, the driving component 3 drives the connecting frame to move, and the connecting frame slides on the multiple guide slide shafts and compresses the multiple elastic buffers. The elastic buffers are preferably compression springs that play a buffering role. After the elastic buffers are completely compressed, the connecting frame applies pressure to the upper body 401 through the elastic buffer, so that the upper body 401 applies pressure to the elastic compression body 5 to contact and press the biodegradable film.

[0063] Example 6

[0064] See also Figure 1-11 Two stable reinforcement components 12 are also fixed on the base 11, and the two stable reinforcement components 12 are relatively connected on both sides of the upper base body 401; the stable reinforcement component 12 includes: a reinforcement plugboard 1201 at one end is inserted into the side slot of the upper base body 401, and the other end of the reinforcement plugboard 1201 is slid into the horizontal slideway of the shrinkage sleeve 1202, and the shift block 1203 fixed on the reinforcement plugboard 1201 is slid into the limit shift groove on the upper surface of the shrinkage sleeve 1202, and a compression spring 1204 is fixed between the reinforcement plugboard 1201 and the inner side surface of the horizontal slideway of the shrinkage sleeve 1202, and the shrinkage sleeve 1202 is slid onto the rectangular guide rod 1205 through a rectangular sliding hole; the rectangular guide rod 1205 is fixed to the base 11.

[0065] The two reinforcing plates 1201 inserted into the side slots of the upper seat body 401 drive the two shrinking sleeves 1202 to slide on the two rectangular guide rods 1205, which is beneficial to improving the stability of the upper seat body 401 when driving the elastic compression body 5 and the heat sealing knife 7 to cooperate in heat sealing the biodegradable film; and the structural setting of the two stable reinforcing components 12 is convenient for connection or disassembly with the side slots of the upper seat body 401. During disassembly, the control block 1203 drives the reinforcing plate 1201 to slide into the horizontal slideway of the shrinking sleeve 1202 and compress the compression spring 1204, so that the reinforcing plate 1201 can be separated from the side slot of the upper seat body 401, which is very convenient.

[0066] Example 7

[0067] See also Figure 1-11 A heat sealing method, applied to the biodegradable film high-precision low-pressure heat sealing mechanism, comprises the following steps:

[0068] Placing the multi-layer biodegradable film to be heat-sealed on the lower heat-seal plunger part 2, and placing the multi-layer biodegradable film between the lower heat-seal plunger part 2 and the upper heat-seal plunger part 1;

[0069] Turning on the heat-seal knife 7 and the driving part 3 in the lower heat-seal plunger part 2;

[0070] The driving part 3 drives the upper heat-seal plunger part 1 to approach the lower heat-seal plunger part 2, so as to perform heat-seal compression treatment on the multi-layer biodegradable film through the cooperation of the elastic compression body 5 and the heat-seal knife 7;

[0071] When the driving part 3 drives the upper heat-seal plunger part 1 to approach the lower heat-seal plunger part 2 to make the elastic compression body 5 reach a preset compression amplitude, the upper plunger seat 4 and the lower plunger seat 6 are respectively compressed on the two side surfaces of the biodegradable film, a preset heat-seal pressure is reached, and the heat-seal of the multi-layer biodegradable film is completed.

[0072] The heat-seal method of the present application can realize the control of heat-seal compression force and temperature, and effectively solve the problem of poor heat-seal effect caused by unstable lower pressure and insufficient or excessive heat-seal temperature.

[0073] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0074] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] 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 the art, 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: An upper heat-sealing head component (1) and a lower heat-sealing head component (2) are arranged in a relatively matched manner, and a driving component (3) for driving the upper heat-sealing head component (1) to approach or move away from the lower heat-sealing head component (2); the upper heat-sealing head component (1) comprises: an upper head seat (4) connected to the driving component (3), and an elastic compression body (5) connected to the upper head seat (4); the lower heat-sealing head component (2) comprises: a lower head seat (6) arranged on a processing table, and a heat-sealing knife (7) connected to the lower head seat (6), and the heat-sealing knife (7) is arranged just below the elastic compression body (5); when the driving component (3) drives the upper heat-sealing head component (1) to approach the lower heat-sealing head component (2) so that the elastic compression body (5) reaches a preset compression amplitude, the upper head seat (4) and the lower head seat (6) are respectively pressed on the two side surfaces of the biodegradable film to achieve a preset heat-sealing pressure; The upper pressure head seat (4) comprises: an upper seat body (401) connected to the driving component (3); a regulating slide (402) is slidably provided in a regulating slide groove at the bottom of the upper seat body (401); the regulating slide (402) is connected to one end of the elastic compression body (5) that slides into the regulating slide groove; two regulating screws (403) rotated on the regulating slide (402) are screwed into the internal threaded holes at the top of the upper seat body (401); and the inner ends of the two anti-loosening screws screwed on the upper seat body (401) abut against the two regulating screws (403); The bottom of the upper seat (401) is provided with two side slide grooves connected to the regulating slide groove, and a pre-pressing slide plate (404) is slidably provided in the two side slide grooves. The two pre-pressing slide plates (404) are relatively slidably provided on both sides of the regulating slide (402) and the elastic compression body (5), and the horizontal height of the lower surface of the two pre-pressing slide plates (404) is lower than the horizontal height of the lower surface of the elastic compression body (5); the sliders (405) fixed to the outer sides of the two pre-pressing slide plates (404) are slidably provided on both sides of the open slide groove in the middle of the top of the upper seat (401). side; two sliders (405) are respectively connected to the bottom of the plurality of vertical shafts (406), the middle parts of the plurality of vertical shafts (406) are slidably arranged in the vertical through holes of the T-shaped frame (407), the clamping rings at the tops of the plurality of vertical shafts (406) are clamped on the upper surface of the T-shaped frame (407), and the vertical shaft (406) is located between the T-shaped frame (407) and the slider (405) and a tensioning spring (408) is sleeved on the shaft body; the T-shaped frame (407) is fixed in the middle of the upper surface of the regulating slide (402) and is penetrated into the open slide groove.

2. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The lower pressure head seat (6) is provided with a sensor, and when the sensor detects that the upper pressure head seat (4) is in contact with the biodegradable film, a signal is sent to the controller, and the controller controls the driving component (3) to stop driving the upper heat-sealing pressure head component (1) to approach the lower heat-sealing pressure head component (2).

3. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The elastic compression body (5) is a strip-shaped compression block made of high-temperature resistant rubber.

4. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 3, characterized in that: The top surface of the strip-shaped pressing block is mounted in an open groove on the lower surface of the upper pressing head seat (4), and the bottom surface of the strip-shaped pressing block is connected to a heat-insulating pressing plate arranged to cooperate with the heat-sealing knife (7).

5. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 1, characterized in that: The outer end of the slider (405) is connected to one or more first pressure components (8) connected to the outer slide groove of the upper seat (401), and the first pressure component (8) includes: a force transmission inclined rod (801) rotated on the slider (405), and the end of the force transmission inclined rod (801) away from the slider (405) is rotated to the upper end of the pressure slide (802), and the pressure slide (802) slid in the outer slide groove of the upper seat (401) is connected to one end of the first pressure spring (803), and the other end of the first pressure spring (803) is connected to the spring seat (9) installed in the outer slide groove of the upper seat (401).

6. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 5, characterized in that: The spring seat (9) comprises: a vertical seat body (901) connected to the first pressure spring (803), the vertical seat body (901) is fixed on the upper rack (902), the middle part of the upper rack (902) is slid on the force seat (903), and a compression spring (904) is fixed between the stop block at the outer end of the upper rack (902) and the force seat (903); the lower part of the upper rack (902) is engaged with the gear (905) rotated on the force seat (903), and when the pre-compression slide (404) slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body (5), the lower part of the gear (905) is engaged with the lower rack (804) fixed on the pressure slide (802).

7. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 6, characterized in that: A second pressure spring (906) is also fixed on the vertical seat body (901), and there is a gap between the second pressure spring (906) and the pressure slide (802). When the pre-compression slide (404) slides upward in the side slide groove so that the horizontal height of the lower surface is the same as the horizontal height of the lower surface of the elastic compression body (5), the second pressure spring (906) abuts and fits on the pressure slide (802); the force seat (903) is slidably arranged in the outer slide groove of the upper seat body (401), and the force seat (903) is threadedly connected to the pressure regulating screw (907), and the pressure regulating screw (907) is rotated on the fixed block (908) in the outer slide groove.

8. A heat sealing method, applied to the high-precision low-pressure heat sealing mechanism for biodegradable films according to any one of claims 1 to 7, characterized in that: The following steps are involved: Placing the multi-layer biodegradable film to be heat-sealed on the lower heat-sealing head component (2), and positioning the multi-layer biodegradable film between the lower heat-sealing head component (2) and the upper heat-sealing head component (1); Opening the heat sealing knife (7) and the driving component (3) in the lower heat sealing pressure head component (2); The driving component (3) drives the upper heat-sealing pressure head component (1) to approach the lower heat-sealing pressure head component (2), thereby performing heat-sealing and pressing processing on the multi-layer biodegradable film through the cooperation of the elastic compression body (5) and the heat-sealing knife (7); When the driving component (3) drives the upper heat-sealing pressure head component (1) to approach the lower heat-sealing pressure head component (2) so that the elastic compression body (5) reaches a preset compression amplitude, the upper pressure head seat (4) and the lower pressure head seat (6) are respectively pressed against the two side surfaces of the biodegradable film to reach the preset heat-sealing pressure, thereby completing the heat sealing of the multi-layer biodegradable film.

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