Biodegradable film high-precision low-pressure heat sealing mechanism and heat sealing method

Abstract

The invention 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.The biodegradable film high-precision low-pressure heat-sealing mechanism comprises an upper heat-sealing pressure head part, a lower heat-sealing pressure head part and a driving part, the upper heat-sealing pressure head part and the lower heat-sealing pressure head part are oppositely arranged in a matched mode, and the driving part is used for driving the upper heat-sealing pressure head part to be close to or away from the lower heat-sealing pressure head part; the upper heat-sealing pressure head component comprises an upper pressure head seat connected with the driving component and an elastic compression body connected to the upper pressure head seat; the lower heat sealing pressure head component comprises a lower pressure head seat arranged on the machining table and a heat sealing cutter connected to the lower pressure head seat, and the heat sealing cutter is arranged under the elastic compression body in a matched mode. By arranging the elastic compression body capable of carrying out compression deformation in different amplitudes, the pressure during heat sealing is adjusted, accurate control over the heat sealing pressure is achieved, 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 specifically to a high-precision low-pressure heat-sealing mechanism and a heat-sealing method for biodegradable film. Background Art

[0002] The heat sealing of biodegradable films requires the use of a heat sealing mechanism to seal two or more layers of films without damage, thereby ensuring the quality of the seal and the performance of the biodegradable material. The heat sealing mechanism in the prior art cannot reasonably apply the downward pressure during the heat sealing of the biodegradable film. If the downward pressure is too small, the heat sealing temperature is not enough, and the multi-layer film cannot be fully melted, which is prone to 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 excessive melting and easy to be pulled apart, which also affects 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 by 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 which are arranged in a relatively matched manner, 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 on 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, and 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 seat is slidably provided in the regulating slide groove at the bottom of the upper seat body, the regulating slide seat 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 seat 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 slide plates are slidably arranged in the two side slide grooves, and the two pre-stressing slide plates are relatively slidably arranged on both sides of the regulating slide seat and the elastic compression body, and the horizontal height of the lower surfaces of the two pre-stressing slide plates is lower than the horizontal height of the lower surface of the elastic compression body; the sliding blocks fixed to the outside of the two pre-stressing slide plates are slidably arranged on both sides of the open slide groove in the middle of the top of the upper seat body; the two sliding blocks are respectively connected to the bottom of multiple vertical shafts, and the middle parts of the multiple vertical shafts are slidably arranged 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 located between the T-frame and the sliding block; the T-frame is fixed in the middle of the upper surface of the regulating slide seat 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 a 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 slidably mounted 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 meshed with the gear rotated on the force-bearing seat, and when the pre-compression slide plate 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 meshed with the lower rack fixed on the pressure slide seat.

[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-pressure slide plate 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 slidably arranged 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 body 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 an elastic buffer is sleeved on the shaft body of the guide slide shaft located between the upper seat body and the connecting frame; 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, so that the multi-layer biodegradable film is heat-sealed and pressed by the cooperation of the elastic compression body and the heat-sealing knife;

[0019] 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 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] It can be seen from the above scheme that the beneficial effects of the present invention are:

[0021] The present invention discloses a high-precision low-pressure heat-sealing mechanism and a heat-sealing method for biodegradable films. A heat-sealing knife is arranged 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 arranged on an upper pressure head seat. The elastic compression body can be compressed and deformed to different extents to adjust the pressure during heat sealing. When a 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 extent, 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 An overall schematic diagram of a first direction provided by an embodiment of the present invention;

[0025] Figure 2 An overall schematic diagram of a second direction provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the upper heat sealing head component provided in a first direction according to an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the upper heat sealing head component provided in the second direction of the embodiment of the present invention;

[0028] Figure 5 A partial schematic diagram of an upper heat sealing head component provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of an upper seat provided in an embodiment of the present invention;

[0030] Figure 7 Schematic diagram of a first pressurizing component and a spring seat provided in an embodiment of the present invention Figure 1 ;

[0031] Figure 8 Schematic diagram of a first pressurizing component and a spring seat provided in an embodiment of the present invention Figure 2 ;

[0032] Fig. 9 A schematic diagram of a lower heat sealing head component provided in an embodiment of the present invention;

[0033] Fig.10 A schematic diagram of a hot pressing buffer component provided by an embodiment of the present invention;

[0034] Fig.11 A schematic diagram of a stabilizing and reinforcing component provided in an embodiment of the present invention.

[0035] Icons: upper heat sealing head component 1; lower heat sealing head component 2; driving component 3; upper head seat 4; upper seat body 401; regulating slide 402; regulating screw 403; pre-pressing slide 404; slider 405; vertical axis 406; T-frame 407; tensioning spring 408; elastic compression body 5; lower head seat 6; heat sealing knife 7; first pressurizing component 8; force transmission inclined rod 801; pressurizing slide 802; first pressurizing spring 803; spring seat 9; vertical seat body 901; upper rack 902; force bearing seat 903; compression spring 904; gear 905; second pressurizing spring 906; pressure regulating screw 907; fixing block 908; hot pressing buffer component 10; base 11; stabilizing reinforcement component 12; reinforcement plug plate 1201; shrinking sleeve 1202; shifting 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 drawings in the embodiments of the present invention, it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0038] Embodiment 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 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 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 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 matched and 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 reach a preset heat-sealing pressure.

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

[0041] A high-precision low-pressure heat-sealing mechanism for biodegradable films of the present invention, 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 a 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, and then the heat-sealing knife 7 in the lower heat-sealing head component 2 is turned on to heat the heat-sealing knife 7 to heat it 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 by 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] The lower pressure head seat 6 is provided with a sensor. 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, so as 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 side surfaces of the biodegradable film on both sides, and at this time, the biodegradable film is heat-sealed under a 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, and the biodegradable film is heat-sealed by the heat-insulating pressing plate and the heat-sealing knife 7. Compared with heat-sealing the biodegradable film by a strip pressing block made of rubber and a 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 pressing 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 pressing 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 pressing 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 the pressure.

[0045] Embodiment 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, 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, an adjusting slide 402 is connected to one end of an elastic compression body 5 that slides into an adjusting slide groove. The position of the adjusting slide 402 in the adjusting slide groove can be adjusted to adjust the length of the elastic compression body 5 extending out of the adjusting slide groove, so that it is convenient to control when installing different elastic compression bodies 5 to meet the installation requirements of different elastic compression bodies 5. When adjusting the position of the adjusting slide 402 in the adjusting slide groove, the two adjusting screws 403 are rotated at the same time to change the connection between the two adjusting screws 403 and the internal threaded holes at the top of the upper seat body 401. By touching the position, the regulating slide 402 can be driven to slide in the regulating groove. 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 regulating slide 402 is adjusted is selected according to the actual situation. In addition, controlling the regulating slide 402 to slide outside the regulating groove at the bottom of the upper seat 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 regulating slide 402, which is convenient for the rapid replacement of the elastic compression body 5.

[0049] Embodiment 3

[0050] See also Figure 1-11 Two side slide grooves connected to the regulating slide groove are provided at the bottom of the upper seat body 401, and pre-compression slide plates 404 are slidably arranged in the two side slide grooves. The two pre-compression slide plates 404 are relatively slidably arranged on both sides of the regulating slide seat 402 and the elastic compression body 5, and the horizontal height of the lower surface of the two pre-compression slide plates 404 is lower than the horizontal height of the lower surface of the elastic compression body 5; the sliders 405 fixedly connected to the outer sides of the two pre-compression slide plates 404 are slidably arranged on both sides of the open slide groove in the middle of the top of the upper seat body 401; the two sliders 405 are respectively connected to the bottom of multiple vertical shafts 406, and the middle parts of multiple vertical shafts 406 are slidably arranged in the vertical through holes of the T-frame 407, and the clamping rings at the tops of the multiple vertical shafts 406 are clamped on the upper surface of the T-frame 407, and the tensioning spring 408 is sleeved on the shaft body of the vertical shaft 406 located between the T-frame 407 and the slider 405; the T-frame 407 is fixedly arranged in the middle of the upper surface of the regulating slide seat 402 and is penetrated in the open slide groove.

[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 biodegradable films of the present invention, pre-pressing slide plates 404 are slidably arranged in the two side slide grooves at the bottom of the upper seat body 401, and the two pre-pressing slide plates 404 are relatively slidably arranged on both sides of the regulating slide seat 402 and the elastic compression body 5. During heat sealing, the two pre-pressing slide plates 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 slide plates 404 slide upward in the two side slide grooves, driving the two sliders 405 to slide on the multiple vertical shafts 406, and pressing the multiple tensioning 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 the 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 pressing block, so that the two sides of the biodegradable film can be accurately controlled. The two pre-pressing slide plates 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 slide plates 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 body 401 and the elastic compression body 5, that is, the sliding of the elastic compression body 5 in the regulating groove of the upper seat body 401 after deformation and expansion, is likely to increase 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 and causing the width of the heat sealing position to increase, thereby affecting the accuracy of heat sealing; in the present invention, through the provision of two pre-pressing slides 404, it is also beneficial to reduce 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] Embodiment 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 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. The pressure slide 802 slidably arranged 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 a biodegradable film of the present invention, in order to further improve the stability of the pre-pressing slide 404 on the top pressure of 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-pressing slide 404 on the top pressure of the biodegradable film during heat sealing is improved.

[0057] Embodiment 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 slidably mounted on the force-bearing seat 903, and a compression spring 904 is fixedly arranged between the stopper at the outer end of the upper rack 902 and the force-bearing seat 903; the lower part of the upper rack 902 is meshed with a gear 905 transferred to the force-bearing seat 903, and the pre-pressing slide plate 404 slides upward in the side slide groove to make the horizontal height of the lower surface 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 meshed with the gear 905 fixed on the pressure slide seat 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-pressure slide plate 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 against 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.

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

[0060] In a high-precision low-pressure heat-sealing mechanism for a biodegradable film of the present invention, the position of the force-bearing seat 903 can be adjusted according to actual needs. During adjustment, the pressure-adjusting screw 907 is rotated to change the connection position between it and the force-bearing seat 903, thereby controlling the force-bearing seat 903 to slide in the outer slide groove of the upper seat body 401, thereby changing the initial compression amplitude of the first pressure-adding spring 803, thereby changing the initial pre-pressure of the pre-pressure slide plate 404, which is convenient for adjusting the pre-pressure degree according to the characteristics of different materials, optimizing the distribution of pressure in the biodegradable film, and improving the accuracy of heat sealing. When the strength and thickness of the biodegradable film are relatively high, in order to enhance the heat-sealing accuracy of the biodegradable film and prevent the displacement of the biodegradable film, the pre-pressure of the pre-pressure slide plate 404 can be further increased, and as the compression deformation amplitude of the elastic compression body 5 increases, the pre-pressure of the pre-pressure slide plate 404 can be gradually increased to realize the automatic pressure-increasing adjustment of the pre-pressure of the pre-pressure slide plate 404, specifically as follows: When the compression deformation amplitude of the compression body 5 gradually increases, the upward movement distance of the slider 405 gradually increases. When the pre-stressing slide plate 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 engages with the lower rack 804 fixed on the pressurizing slide seat 802. At this time, as the pressure continues to be applied, the lower rack 804 moves outward and the meshing gear 905 rotates. The gear 905 meshes with the upper rack 902 and drives the upper rack 902 to move on the force-bearing seat 903 toward the pressurizing slide seat 802, so that the second pressurizing spring 906 is in contact with the pressurizing slide seat 802 and gradually compresses the second pressurizing spring 906, thereby increasing the pre-stressing degree. When the upper rack 902 moves on the force-bearing seat 903 toward the pressurizing slide seat 802, the compression spring 904 is also compressed. The compression spring 904 is used for both resetting the upper rack 902 and cooperating to increase the pre-stressing force.

[0061] During the heat sealing process, the biodegradable films on both sides of the heat sealing position are pressed by the pre-pressing slide plates 404 on both sides, and the pressing force on the biodegradable films on both sides of the heat sealing position is continuously increased, so that the films on both sides of the heat sealing position can be better fitted with the heat sealing knife, ensuring that heat can be evenly transferred to the entire film layer, optimizing the heat sealing effect, and by increasing the pressing force, the temperature and pressure conditions in the heat sealing process can be better controlled, and the quality and consistency of the heat-sealed seam can be improved; and increasing the pressing force can better adapt to the characteristics of different materials, especially for thicker or difficult to heat-seal materials, increasing the pressing force can improve the success rate of heat sealing.

[0062] The top of the upper seat 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 seat 401, the middle of multiple guide slide shafts are slidably connected to the connecting frame, and the guide slide shaft is located between the upper seat 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 seat 401 are all connected with 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, which play a buffering role. After the elastic buffers are completely compressed, the connecting frame applies pressure to the upper seat 401 through the elastic buffers, so that the upper seat 401 applies pressure to the elastic compression body 5 to contact and press the biodegradable film.

[0063] Embodiment 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 to the two sides of the upper seat body 401; the stable reinforcement component 12 includes: a reinforcement plug plate 1201 with one end inserted into the side slot of the upper seat body 401, the other end of the reinforcement plug plate 1201 is slidably set in the horizontal slideway of the shrinkage sleeve 1202, the shift block 1203 fixed on the reinforcement plug plate 1201 is slidably set in the limit shift groove on the upper surface of the shrinkage sleeve 1202, a compression spring 1204 is fixedly connected between the reinforcement plug plate 1201 and the inner side surface of the horizontal slideway of the shrinkage sleeve 1202, and the shrinkage sleeve 1202 is slidably set on the rectangular guide rod 1205 through a rectangular sliding hole; the rectangular guide rod 1205 is fixed on 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. When disassembling, the control block 1203 drives the reinforcing plate 1201 to slide in 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] Embodiment 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] 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;

[0069] Open the heat sealing knife 7 and the driving component 3 in the lower heat sealing head component 2;

[0070] The driving component 3 drives the upper heat-sealing head component 1 to approach the lower heat-sealing head component 2, so that the multi-layer biodegradable film is heat-sealed and pressed by the cooperation of the elastic compression body 5 and the heat-sealing knife 7;

[0071] 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 reach the preset heat-sealing pressure, thereby completing the heat sealing of the multi-layer biodegradable film.

[0072] A heat sealing method of the present invention can realize the control of heat sealing pressure and temperature, and effectively solve the problem of poor heat sealing effect caused by insufficient or excessive heat sealing temperature due to unstable downward pressure.

[0073] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the 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 the illustrations shown and described herein.

Claims

1. Biodegradable film high-precision low-pressure heat sealing mechanism, characterized in that: 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 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 head seat (4) and the lower head seat (6) are respectively pressed on the two side surfaces of the biodegradable film to reach a preset heat-sealing pressure.

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 installed in the 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 upper pressure head seat (4) comprises: an upper seat body (401) connected to the driving component (3); a regulating slide seat (402) is slidably arranged in a regulating slide groove at the bottom of the upper seat body (401); the regulating slide seat (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 seat (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).

6. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 5, characterized in that: The bottom of the upper seat body (401) is provided with two side sliding grooves connected to the regulating sliding groove, and a pre-pressing slide plate (404) is slidably arranged in the two side sliding grooves. The two pre-pressing slide plates (404) are relatively slidably arranged on both sides of the regulating sliding seat (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 sliding block (405) fixed to the outer side of the two pre-pressing slide plates (404) is slidably arranged in the middle of the open sliding groove at the top of the upper seat body (401). On both sides; 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); a tensioning spring (408) is sleeved on the shaft body of the vertical shaft (406) located between the T-shaped frame (407) and the sliders (405); the T-shaped frame (407) is fixedly arranged in the middle of the upper surface of the regulating slide seat (402) and is penetrated in the open slide groove.

7. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 6, 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 body (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 seat (802), and the pressure slide seat (802) slidably arranged 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).

8. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 7, characterized in that: The spring seat (9) comprises: a vertical seat body (901) connected to a first pressure spring (803); the vertical seat body (901) is fixed on an upper rack (902); the middle part of the upper rack (902) is slidably mounted on a force bearing seat (903); a compression spring (904) is fixedly mounted between a stopper at an outer end of the upper rack (902) and the force bearing seat (903); the lower part of the upper rack (902) is meshed with a gear (905) mounted on the force bearing seat (903); when the pre-compression slide plate (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 meshed with a lower rack (804) fixed on the pressure sliding seat (802).

9. The high-precision low-pressure heat-sealing mechanism for biodegradable films according to claim 8, characterized in that: The vertical seat body (901) is also fixed with a second pressure spring (906), and there is a gap between the second pressure spring (906) and the pressure slide seat (802). When the pre-pressure slide plate (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 against and fits on the pressure slide seat (802); the force-bearing seat (903) is slidably arranged in 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 on the fixed block (908) in the outer slide groove.

10. 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 9, 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 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 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 reach the preset heat-sealing pressure, thereby completing the heat sealing of the multi-layer biodegradable film.

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