Heat sealing device for plastic film production

Abstract

The invention relates to a heat sealing device for plastic film production, which is applied to the technical field of film heat sealing and comprises a device body, a film platform, a high-frequency electric field plate module, an electrode mold, an exhaust groove, a movable hole, an air compression module, a lower abutting sliding block and an upper abutting sliding block in a sliding abutting mode. The poking needle directly pierces the plastic film, air is directly discharged from a crevasse, the air discharging efficiency is effectively improved, in the downward pressing process of the air pressing module, a lower abutting sliding block and an upper abutting sliding block are used for sliding abutting, the needle base plate drives the poking needle to move, and therefore the needle tip of the poking needle scrapes the plastic film; the size of the crevasses is effectively increased, the efficiency of discharging air from the crevasses is effectively improved, the crevasses on the subsequent plastic film are fused and heat-sealed together, and the influence of the formed crevasses on the fusion and heat-sealing of the plastic film is effectively reduced.

Description

Technical Field

[0001] The present invention relates to a heat sealing device, in particular to a heat sealing device for producing plastic films, which is applied in the field of film heat sealing technology. Background Art

[0002] Heat sealing refers to the process of heating and bonding plastic, rubber and other materials together; a heat sealing machine heats and seals product packaging to achieve a sealed state. The heat generated by high-frequency heating is mainly generated by the electromagnetic field changing tens of thousands, millions, or even hundreds of millions of times per second on the object. High-frequency heating can be divided into high-frequency induction heating, high-frequency dielectric heating, high-frequency plasma heating, and microwave heating according to different frequency ranges.

[0003] The specification of Chinese patent CN109049935A discloses "An improved process for the heat-sealing production of plastic films", which uses a smooth-surfaced adhesive roller to extrude the plastic film, and uses plastic particles as an adhesive to strengthen the connection between the two plastic films to be bonded before bonding. Compared with the traditional heat-sealing process, it avoids the problem of roller sticking and also improves the bonding strength. The specification of Chinese patent CN115257131A discloses "A plastic film heat-sealing production device", which can drive the heat-sealing mechanism and the lifting mechanism through a set driving mechanism; the set first roller and second roller can guide the film so that the feed amount of the film is uniform, and the set slider can slide inside the slide groove, thereby enabling the second roller to be lifted, and the second roller will be separated from the first roller, and then the film can be placed between the first roller and the second roller.

[0004] When the plastic film is melt-sealed, the plastic film needs to be stacked flat. The suspended plastic film is not clamped and fixed, and the staff needs to manually pull the plastic film flat. The main purpose of flattening is to exhaust the air between the plastic films during the pressing process of the plastic film mold. However, relying solely on flattening the plastic film has limited effect on the subsequent air extrusion. The air blocks heat conduction during the high-frequency heat sealing of the plastic film, and the plastic film cannot be fully melted, affecting the melt heat sealing effect of the plastic film. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that air blocks heat conduction during high-frequency heat sealing of plastic films, and the plastic films cannot be fully melted, thereby affecting the melting and heat sealing effect of the plastic films.

[0006] To solve the above problems, the present invention provides a heat sealing device for plastic film production, comprising a device body, a film platform fixedly connected to the middle of the device body, a lifting cylinder fixedly connected to the top of the device body, the output end of the lifting cylinder fixedly connected to the lifting platform, a high-frequency electric field plate module fixedly connected to the bottom of the lifting platform, an electrode mold fixedly connected to the bottom of the high-frequency electric field plate module, and the electrode mold vertically corresponding to the film platform; An exhaust groove is provided on the lower surface of the electrode mold, and a movable hole is provided between the outer periphery of the bottom of the electrode mold and the middle of the exhaust groove. A puncture needle is movably connected inside the movable hole, and a needle seat plate is slidably connected to the top of the electrode mold. The needle handle end of the puncture needle is fixedly connected to the needle seat plate. The middle part of the lifting platform is fixedly connected with a downward pressure cylinder, the output end of the downward pressure cylinder is fixedly connected with a compression module, the compression module is socketed with the middle part of the electrode mold, the top of the needle seat plate is fixedly connected with a lower contact slider, the top outside of the compression module is fixedly connected with an upper contact slider, the lower contact slider slides and contacts with the upper contact slider, and the contact surfaces of the lower contact slider and the upper contact slider are both inclined.

[0007] In the above-mentioned heat sealing device for plastic film production, the air compression module performs a compression process on the plastic film, so that the air between the plastic films is discharged through the exhaust groove, and the piercing needle directly pierces the plastic film, further effectively improving the air discharge efficiency, thereby effectively improving the melting heat sealing effect of the plastic film.

[0008] As a further improvement of the present application, a fixing rod is fixedly connected to the outside of the top end of the electrode mold, the fixing rod is sleeved with the needle seat plate, and a buffer spring is sleeved between the outer end of the fixing rod and the needle seat plate. By sleeved with the needle seat plate, the installation stability of the needle seat plate is effectively improved, and the elastic force of the buffer spring is utilized to facilitate the automatic restoration of the position of the needle seat plate.

[0009] As a further improvement of the present application, the needle tip of the pricking needle is arranged at an angle, and the pricking needle is made of spring steel material, so that the pricking needle has good elasticity and effectively reduces the breakage of the pricking needle.

[0010] As a further improvement of the present application, the lower end of the movable hole away from the compressed air module is fixedly connected to a pillow block portion, and the needle tip of the pricking needle slides and contacts with the pillow block portion. When the pricking needle moves inside the movable hole, the needle tip of the pricking needle contacts with the pillow block portion to lift up, thereby separating the pricking needle from the plastic film, effectively reducing the melting and heat-sealing effect of the pricking needle on the plastic film.

[0011] As another improvement of the present application, an inner groove is provided at the bottom of the air compression module, and a film pressing package is fixedly connected to the lower opening of the inner groove. The film pressing package is utilized to effectively improve the compression effect of the air compression module on the plastic film.

[0012] As another improved supplement to the present application, the laminating package is made of latex material, the lower surface of the laminating package is set in an arc shape, and the lower surface of the laminating package protrudes from the lower surface of the electrode mold. The laminating package made of latex material has strong deformation ability, which effectively improves the contact effect between the laminating package and the plastic film, and the arc-shaped laminating package contacts the plastic film in advance, realizing the process of squeezing the plastic film from the middle to the outside, further effectively improving the air exhaust effect between the plastic films.

[0013] As another improved supplement to the present application, the inner ring of the bottom end of the electrode mold is fixedly connected to a mold bushing, the top end of the mold bushing is set in an arc surface, and the top arc surface of the mold bushing is covered with an insulating gasket, and the outer ring of the lower surface of the molding package is in movable contact with the insulating gasket. The mold bushing is used to effectively isolate the electrode mold and the molding package, thereby effectively reducing the temperature impact of the electrode mold on the molding package.

[0014] In summary, the present invention realizes the melting and heat sealing of the plastic film on the film platform through the high-frequency electric field plate module and the electrode mold, and the air compression module pre-compresses the plastic film to realize the discharge of air between the plastic films through the exhaust groove, and the puncture needle directly punctures the plastic film to realize the direct discharge of air from the rupture, effectively improving the air discharge efficiency, thereby effectively improving the melting and heat sealing effect of the plastic film, and in the downward pressing process of the air compression module, the lower contact slider and the upper contact slider are used to slide and conflict, so that the needle seat plate drives the puncture needle to move, thereby realizing the scraping of the needle tip of the puncture needle on the plastic film, effectively increasing the size of the rupture, and effectively enhancing the air discharge efficiency from the rupture, and the subsequent ruptures on the plastic film are melted and heat-sealed together, effectively reducing the influence of the opened ruptures on the melting and heat sealing of the plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall three-dimensional structural diagram of the first embodiment of the present application; Figure 2 This is a bottom-view stereoscopic structural diagram of an electrode mold according to the first embodiment of the present application; Figure 3 This is a top-down perspective structural diagram of an electrode mold according to the first embodiment of the present application; Figure 4 This is a sectional three-dimensional structural diagram of an electrode mold according to the first embodiment of the present application; Figure 5 This is a three-dimensional structural diagram of the needle and needle base plate of the first embodiment of the present application; Figure 6 This is an enlarged view of the movable hole in the first embodiment of the present application; Figure 7 This is a demonstration diagram of the movement of the needle in the movable hole according to the first embodiment of the present application; Figure 8This is a three-dimensional structural diagram of the lamination package, mold bushing and thermal insulation gasket according to the second embodiment of the present application; Figure 9 This is a three-dimensional disassembled structural diagram of the second embodiment of the present application, including the lamination package, mold sleeve and thermal insulation gasket.

[0016] Description of the numbers in the figure: 1. Device body; 101. Film platform; 102. Lifting cylinder; 103. Lifting platform; 104. High-frequency electric field plate module; 2. Electrode mold; 201. Exhaust groove; 202. Movable hole; 203. Prick needle; 204. Needle seat plate; 205. Lower contact slider; 206. Upper contact slider; 207. Fixed rod; 208. Buffer spring; 209. Pillow block; 3. Pressing cylinder; 301. Air compression module; 302. Inner groove; 303. Film pressing package; 304. Mold bushing; 305. Thermal insulation gasket. DETAILED DESCRIPTION

[0017] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0018] The first implementation method: Figures 1 to 6 The figure shows a heat sealing device for producing plastic films, comprising a device body 1, a film platform 101 being fixedly connected to the middle of the device body 1, a lifting cylinder 102 being fixedly connected to the top of the device body 1, a lifting platform 103 being fixedly connected to the output end of the lifting cylinder 102, a high-frequency electric field plate module 104 being fixedly connected to the bottom of the lifting platform 103, an electrode mold 2 being fixedly connected to the bottom of the high-frequency electric field plate module 104, the electrode mold 2 being vertically corresponding to the film platform 101, an exhaust groove 201 being provided on the lower surface of the electrode mold 2, a movable hole 202 being provided between the bottom periphery of the electrode mold 2 and the middle of the exhaust groove 201, a puncture needle 203 being movably connected to the inside of the movable hole 202, a needle seat plate 204 being slidably connected to the top of the electrode mold 2, and the needle handle end of the puncture needle 203 being fixedly connected to the needle seat plate 204; When the plastic film is melt-sealed, the plastic film to be melt-sealed is laid flat on the film platform 101, and the lifting cylinder 102 drives the lifting platform 103 to descend, so that the high-frequency electric field plate module 104 cooperates with the electrode mold 2 to press on the plastic film, and the needle tip of the piercing needle 203 pierces the plastic film. The pierced position of the plastic film is located below the electrode mold 2, which is the melt-sealed position, so that the air at this position is quickly discharged from the punctured hole, thereby effectively avoiding the existence of air bubbles at the melt-sealed position. The hole on the plastic film is melt-sealed together, which effectively improves the melt-sealing effect of the plastic film while effectively reducing the influence of the hole on the melt-sealing effect.

[0019] Figure 4 and Figure 5 It is shown that the middle part of the lifting platform 103 is fixedly connected with the downward pressure cylinder 3, and the output end of the downward pressure cylinder 3 is fixedly connected with the air compression module 301, and the air compression module 301 is sleeved with the middle part of the electrode mold 2, and the top of the needle seat plate 204 is fixedly connected with the lower contact slider 205, and the top external part of the air compression module 301 is fixedly connected with the upper contact slider 206, and the lower contact slider 205 slides and conflicts with the upper contact slider 206, and the conflicting surfaces of the lower contact slider 205 and the upper contact slider 206 are both inclined. The top external part of the electrode mold 2 is fixedly connected with a fixing rod 207, and the fixing rod 207 is sleeved with the needle seat plate 204, and a buffer spring 208 is sleeved between the outer end of the fixing rod 207 and the needle seat plate 204. By sleeved with the fixing rod 207 and the needle seat plate 204, the installation stability of the needle seat plate 204 is effectively improved, and the elastic force of the buffer spring 208 is utilized to facilitate the automatic restoration of the position of the needle seat plate 204. When the downward pressure cylinder 3 drives the air compression module 301 to descend and flattens and exhausts the plastic film, the upper contact slider 206 on the air compression module 301 contacts the lower contact slider 205 on the needle seat plate 204. The inclined surface setting of the lower contact slider 205 and the upper contact slider 206 is used to push the needle seat plate 204, and then the needle seat plate 204 drives the puncture needle 203 to scrape on the plastic film, effectively increasing the size of the hole opened by the puncture needle 203 in the plastic film, and thus effectively improving the efficiency of air discharge from the hole.

[0020] Figure 6 and Figure 7 As shown, the tip of the needle 203 is inclined, and the needle 203 is made of spring steel, so that the needle 203 has good elasticity, which effectively reduces the breakage of the needle 203. The lower end of the movable hole 202 away from the compressed air module 301 is fixedly connected to the pillow block 209. The tip of the needle 203 slides against the pillow block 209. When the needle 203 moves inside the movable hole 202, the tip of the needle 203 hits the pillow block 209 to tilt, so that the needle 203 is separated from the plastic film, which effectively reduces the melting and heat-sealing effect of the needle 203 on the plastic film. When the electrode mold 2 contacts the plastic film, the pricking needle 203 pierces the plastic film. The pricking needle 203 made of spring steel has good elasticity, which effectively reduces the possibility of the pricking needle 203 breaking during the pricking process of the plastic film. When the needle base plate 204 drives the pricking needle 203 to scrape on the plastic film, the pricking needle 203 gradually approaches the pillow block 209. The pillow block 209 resists the pricking needle 203, which intensifies the bending and tilting of the needle tip of the pricking needle 203, thereby achieving the retraction of the needle tip of the pricking needle 203 into the movable hole 202, and the needle tip of the pricking needle 203 is separated from the plastic film, effectively reducing the melting and heat-sealing effect of the pricking needle 203 on the plastic film.

[0021] Second implementation method: Compared with the first embodiment, the main new addition is a film pressing package 303. The specific new structure is as follows, and the remaining structures are consistent with the first embodiment.

[0022] Figure 4 、 Figure 8 and Figure 9 As shown, the bottom of the air compression module 301 is provided with an inner groove 302, and the lower opening of the inner groove 302 is fixedly connected with a film pressing package 303, and the film pressing package 303 is used to effectively improve the compression effect of the air compression module 301 on the plastic film. The film pressing package 303 is made of latex material, and the lower surface of the film pressing package 303 is arranged in an arc shape, and the lower surface of the film pressing package 303 protrudes from the lower surface of the electrode mold 2. The film pressing package 303 made of latex material has strong deformation ability, which effectively improves the contact effect between the film pressing package 303 and the plastic film, and the arc-shaped film pressing package 303 is in advance. Contact the plastic film to realize the process of squeezing the plastic film from the middle to the outside, further effectively improving the air exhaust effect between the plastic films, the inner ring of the bottom end of the electrode mold 2 is fixedly connected with a mold bushing 304, the top of the mold bushing 304 is set in an arc surface, and the top arc surface of the mold bushing 304 is paved with a heat insulating gasket 305, the outer ring of the lower surface of the film package 303 is in active contact with the heat insulating gasket 305, and the mold bushing 304 is used to effectively isolate the electrode mold 2 from the film package 303, effectively reducing the temperature influence of the electrode mold 2 on the film package 303; When the downward pressure cylinder 3 drives the air compression module 301 to descend and flattens and exhausts the plastic film, the film pressing package 303 at the bottom of the air compression module 301 contacts the plastic film, and the arc-shaped film pressing package 303 contacts the plastic film in advance, realizing the process of squeezing the plastic film from the middle to the outside, effectively improving the air exhaust effect between the plastic films, as the air compression module 301 further descends, the film pressing package 303 is gradually flattened and deformed, and the film pressing package 303 provides a retraction space for the film pressing package 303, and the outer ring of the film pressing package 303 contacts the mold bushing 304, and the electrode mold 2 performs temperature insulation treatment on the film pressing package 303, effectively reducing the influence of the temperature of the electrode mold 2 on the film pressing package 303.

[0023] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A heat sealing device for plastic film production, characterized in that: The device comprises a body (1), wherein the middle portion of the body (1) is fixedly connected to a thin film platform (101), the top portion of the body (1) is fixedly connected to a lifting cylinder (102), the output end of the lifting cylinder (102) is fixedly connected to a lifting platform (103), the bottom portion of the lifting platform (103) is fixedly connected to a high-frequency electric field plate module (104), the bottom portion of the high-frequency electric field plate module (104) is fixedly connected to an electrode mold (2), and the electrode mold (2) is vertically corresponding to the thin film platform (101); An exhaust groove (201) is provided on the lower surface of the electrode mold (2), a movable hole (202) is provided between the outer periphery of the bottom of the electrode mold (2) and the middle of the exhaust groove (201), a puncture needle (203) is movably connected inside the movable hole (202), a needle seat plate (204) is slidably connected to the top of the electrode mold (2), and the handle end of the puncture needle (203) is fixedly connected to the needle seat plate (204); The middle of the lifting platform (103) is fixedly connected to a downward pressure cylinder (3), the output end of the downward pressure cylinder (3) is fixedly connected to a compressed air module (301), the compressed air module (301) is sleeved with the middle of the electrode mold (2), the top of the needle seat plate (204) is fixedly connected to a lower contact slider (205), the top outside of the compressed air module (301) is fixedly connected to an upper contact slider (206), the lower contact slider (205) and the upper contact slider (206) are slidably contacted, and the contact surfaces of the lower contact slider (205) and the upper contact slider (206) are both inclined.

2. A heat sealing device for plastic film production according to claim 1, characterized in that: A fixing rod (207) is fixedly connected to the outside of the top end of the electrode mold (2), the fixing rod (207) is sleeved with the needle seat plate (204), and a buffer spring (208) is sleeved between the outer end of the fixing rod (207) and the needle seat plate (204).

3. A heat sealing device for plastic film production according to claim 1, characterized in that: The needle tip of the pricking needle (203) is arranged at an angle, and the pricking needle (203) is made of spring steel material.

4. A heat sealing device for plastic film production according to claim 1, characterized in that: The lower end of the movable hole (202) away from the compressed air module (301) is fixedly connected to a pillow block portion (209), and the needle tip of the puncture needle (203) is in sliding contact with the pillow block portion (209).

5. The heat sealing device for plastic film production according to claim 1, characterized in that: An inner groove (302) is provided at the bottom of the air compression module (301), and a film pressing package (303) is fixedly connected to the lower opening of the inner groove (302).

6. A heat sealing device for plastic film production according to claim 5, characterized in that: The laminating package (303) is made of latex material, the lower surface of the laminating package (303) is arranged in an arc shape, and the lower surface of the laminating package (303) protrudes from the lower surface of the electrode mold (2).

7. A heat sealing device for plastic film production according to claim 5, characterized in that: The inner ring of the bottom end of the electrode mold (2) is fixedly connected to a mold bushing (304), the top end of the mold bushing (304) is arranged in an arc surface, and the top arc surface of the mold bushing (304) is paved with a heat insulating gasket (305), and the outer ring of the lower surface of the film package (303) is in active contact with the heat insulating gasket (305).

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