Plastic packaging bag heat sealing treatment device

Abstract

The invention provides a plastic packaging bag heat-sealing treatment device, and belongs to the technical field of packaging bag production, the plastic packaging bag heat-sealing treatment device comprises a heat-sealing table, a fixing frame and an extrusion frame, the fixing frame and the extrusion frame are arranged on the heat-sealing table, a placing table is mounted on the heat-sealing table, and a first heat-sealing block is mounted on the inner wall of one side of the placing table. According to the plastic film heat sealing device, a smoothing rod is matched with a first heat sealing block to smoothen plastic films on the two sides of a sealing opening before heat sealing, the situation that heat and pressure cannot be evenly transmitted to the films due to the fact that the films are flattened in the heat sealing process is avoided, the packaging integrity is improved, the protection function on internal food is improved, and meanwhile after the plastic films on the two sides are smoothed before heat sealing, the packaging quality is improved. Before the packaging bag is subjected to heat sealing, the heat-sealing tail end of the plastic film is clamped and fixed through moving of a positioning strip in cooperation with a first heat-sealing block, so that the inner space of the packaging bag and the space of the heat-sealing position are blocked, and the situation that harmful gas enters the food packaging bag, pollutes food in the food packaging bag, and consequently the food goes bad or carries toxic substances is avoided; therefore, the food safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bag production, in particular to a heat-sealing processing device for plastic packaging bags. Background Art

[0002] Plastic packaging bags are bags made of plastic as raw material and used to package various items in daily life. Plastic packaging bags are widely used in various fields, from food packaging to postal express bags to garbage bags, etc. They play an indispensable role in daily life. However, this convenience also brings serious environmental problems. It is called one of the main sources of "white pollution". In order to reduce plastic pollution, many countries and regions have taken restrictive measures, such as banning the use of non-degradable plastic packaging bags.

[0003] In the prior art, during the production of food, the packaging bag needs to be sealed to prevent air leakage from causing food spoilage. The common way to seal is through a heat sealing device. However, due to the expansion of the plastic bag by the food inside, it is impossible to ensure that the two plastic films can remain flat during the subsequent sealing process. If wrinkles or unevenness occur, once the plastic bag is sealed, the inner sealing layer of the plastic bag with such a phenomenon is prone to warping. Once the material stored inside is unbalanced or impacted during transportation, the warped plastic bag will be the first to break, causing the food inside to deteriorate. How to invent a heat sealing device for plastic packaging bags to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a heat sealing processing device for plastic packaging bags, aiming to solve the problem that if wrinkles or unevenness occur in the existing heat sealing processing device, it will cause the internal food to deteriorate.

[0005] The present invention is achieved in that:

[0006] The present invention provides a heat-sealing processing device for plastic packaging bags, comprising a heat-sealing table and a fixing frame and an extrusion frame arranged on the heat-sealing table, wherein a placing table is installed on the heat-sealing table, and a first heat-sealing block is installed on an inner wall of one side of the placing table;

[0007] One end of the fixed frame is fixedly connected to the upper outer wall of the heat sealing table, a hydraulic rod is installed on the upper end of the fixed frame, and slide grooves are opened on the inner walls of both sides of the fixed frame. A support plate is installed on the output end of the hydraulic rod, and sliders slidably connected to the inner walls of the slide grooves are installed on both sides of the support plate. Two symmetrical slide rods are installed on the support plate, and a second rack is installed on the outer wall of one side of the slide rod;

[0008] Fixed blocks are installed at both ends of the extrusion frame, and a buffer spring fixedly connected to one end of the slider is installed on the fixed block. A second installation groove is opened on one side of the extrusion frame, and second limiting grooves are opened on the inner walls of both sides of the second installation groove. A first screw rod is installed on the inner wall of the second limiting groove, and a first gear is installed on one end of the first screw rod. A push plate is installed on the inner wall of the extrusion frame, and multiple first extrusion springs are installed on the outer wall of one side of the push plate, and a second heat sealing block is installed on one end of the first extrusion spring.

[0009] Preferably, the upper end surface of the placement table is designed as an inclined surface, the outer wall of the sliding rod is slidably connected to the inner wall of the extrusion frame, and a smoothing rod is installed on the outer wall of the extrusion frame on one side close to the placement table.

[0010] Preferably, both ends of the first screw rod are rotatably connected to the inner wall of the second limiting groove, and the first gear is meshingly connected to the outer wall of the first rack.

[0011] Preferably, the outer wall of the push plate is slidably connected to the inner wall of the extrusion frame, and both ends of the push plate are equipped with first limit blocks slidably connected to the inner wall of the second limit groove, the inner wall of the first limit block is threadedly connected to the outer wall of the first screw rod, and a limit rod is installed at one end of the second heat sealing block, and the outer wall of the limit rod is slidably connected to the inner wall of the push plate.

[0012] Preferably, a first mounting groove is opened on the upper outer wall of the extrusion frame close to the second mounting groove, first limiting grooves are opened on the inner walls on both sides of the first mounting groove, a second screw rod is rotatably connected to the inner wall of the first limiting groove, and a second gear is installed on one end of the second screw rod.

[0013] By adopting the above technical scheme, the packaging bag is mounted on the placement table and the end of the packaging bag that needs to be sealed extends out of the placement table. The hydraulic rod is started to smooth the plastic films on both sides of the sealing portion by the smoothing plate at the lower end of the extrusion frame and the side of the placement table to avoid wrinkles at the sealing portion that affect the appearance. The hydraulic rod then continues to move downward to allow the second heat-sealing block and the first heat-sealing block inside the extrusion frame to cooperate with each other to heat-seal the sealing portion of the plastic packaging bag to avoid flattening of the film during heat sealing, which results in heat and pressure not being evenly transferred to the film, resulting in uneven heating and overheating of some sealing areas, as well as inconsistent sealing strength and the phenomenon of leaking the seal. At the same time, wrinkles and folds are avoided in the unsmoothed plastic film during heat sealing, and stress concentration is prevented at wrinkles and folds that result in fragile and easily damaged seals, thereby improving the integrity of the packaging and the protection function for the food inside.

[0014] Preferably, a mounting block is slidably connected to the inner wall of the first mounting groove, and second limit blocks slidably connected to the inner wall of the first limit groove are installed at both ends of the mounting block, and the inner wall of the second limit block is threadedly connected to the outer wall of the second screw rod.

[0015] Preferably, a second rack meshingly connected to the second gear is mounted on the slide bar.

[0016] Preferably, a mounting groove is provided on one side of the mounting block, a plurality of second extrusion springs are installed on the inner wall of the mounting groove, a positioning block slidably connected to the inner wall of the mounting groove is installed on the side wall at one end of the second extrusion spring, a positioning strip is installed at the corner at one end of the positioning block, and the outer wall of the positioning strip is slidably connected to the outer wall of the second heat sealing block.

[0017] By adopting the above technical scheme, after the sealing portion is smoothed, the hydraulic rod continues to slide down and drives the support plate compression buffer spring to continue to move down. At this time, the sliding bars on both sides of the support plate move downward inside the extrusion frame, and the first rack and the second rack on one side of the sliding bar respectively mesh with the first gear and the second gear during the sliding process, so that the first screw rod rotates to drive the push plate and the second screw rod rotates to drive the mounting block to move. The mounting block moves faster than the push plate, and the outer wall of the positioning strip and the second heat-sealing block contact and slide to avoid the formation of a cavity between the plastic film between the second heat-sealing block and the positioning strip. The mounting block drives the positioning block inside the mounting groove to move, and makes the positioning strip tightly against the end of the heat-sealed portion of the plastic film, and does not hinder the movement of the push plate by compressing the second extrusion spring, thereby blocking the internal space of the packaging bag and the space at the heat-sealed portion, preventing harmful gases from entering the food packaging bag and polluting the food inside, causing the food to deteriorate or carry toxic substances, thereby improving the safety of food.

[0018] The beneficial effects of the present invention are:

[0019] The smoothing rod cooperates with the first heat sealing block to smooth the plastic film on both sides of the seal before heat sealing, so as to avoid the film being flattened during heat sealing, which may cause the heat and pressure to be not evenly transferred to the film, resulting in uneven heating and overheating of some sealing areas, as well as inconsistent sealing strength and leakage. At the same time, it avoids the wrinkles and folds of the unsmoothed plastic film during heat sealing, and prevents the stress concentration at the wrinkles and folds, which may cause the seal to be fragile and easy to break, thereby improving the integrity of the package and the protection function of the internal food;

[0020] At the same time, the plastic films on both sides are smoothed before heat sealing, and before heat sealing the packaging bag, the positioning strip is moved to cooperate with the first heat sealing block to clamp and fix the heat-sealed end of the plastic film, so as to block the internal space of the packaging bag and the space at the heat seal, preventing harmful gases from entering the food packaging bag and polluting the food inside, causing the food to deteriorate or carry toxic substances, thereby improving food safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic structural diagram of a heat-sealing processing device for plastic packaging bags provided in an embodiment of the present invention;

[0023] Figure 2 It is a half-section diagram of the structure of a heat-sealing processing device for plastic packaging bags provided by an embodiment of the present invention;

[0024] Figure 3 It is a partial structural schematic diagram of a heat-sealing processing device for plastic packaging bags provided in an embodiment of the present invention;

[0025] Figure 4 It is a side sectional view of a partial structure of a heat-sealing processing device for a plastic packaging bag provided by an embodiment of the present invention;

[0026] Figure 5 It is a front half-section view of the structure of a heat-sealing processing device for plastic packaging bags provided by an embodiment of the present invention;

[0027] Figure 6 The invention provides a heat-sealing device structure for plastic packaging bags. Figure 5 A magnified view of the structure of the middle A area;

[0028] Figure 7 It is a side sectional view of the partial structure of a heat sealing processing device for plastic packaging bags provided in an embodiment of the present invention.

[0029] In the figure: 1, heat sealing table; 2, placing table; 3, first heat sealing block; 4, fixing frame; 41, slide groove; 5, hydraulic rod; 6, support plate; 61, slider; 62, slide rod; 63, first rack; 64, second rack; 7, extrusion frame; 71, first mounting groove; 711, first limiting groove; 72, second mounting groove; 721, second limiting groove; 73, fixing block; 74, smoothing rod; 8, buffer spring; 9, push plate; 91, first limiting block; 10, second heat sealing block; 101, second extrusion spring; 102, limiting rod; 11, first screw rod; 12, first gear; 13, mounting block; 131, second limiting block; 132, mounting groove; 14, second extrusion spring; 15, positioning block; 151, positioning strip; 16, second screw rod; 17, second gear. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of 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.

[0031] Example, see Figure 1-Figure 7 A heat sealing processing device for plastic packaging bags comprises a heat sealing table 1 and a fixing frame 4 and an extrusion frame 7 arranged on the heat sealing table 1, a placing table 2 is installed on the heat sealing table 1, and a first heat sealing block 3 is installed on the inner wall of one side of the placing table 2;

[0032] One end of the fixed frame 4 is fixedly connected to the upper outer wall of the heat sealing table 1, a hydraulic rod 5 is installed on the upper end of the fixed frame 4, and slide grooves 41 are opened on the inner walls of both sides of the fixed frame 4. A support plate 6 is installed on the output end of the hydraulic rod 5, and sliders 61 slidably connected to the inner walls of the slide grooves 41 are installed on both sides of the support plate 6. Two symmetrical slide rods 62 are installed on the support plate 6, and a second rack 64 is installed on the outer wall of one side of the slide rod 62;

[0033] Fixed blocks 73 are installed at both ends of the extrusion frame 7, and a buffer spring 8 fixedly connected to one end of the slider 61 is installed on the fixed block 73. A second mounting groove 72 is opened on one side of the extrusion frame 7, and second limiting grooves 721 are opened on the inner walls of both sides of the second mounting groove 72. The first screw rod 11 is installed on the inner wall of the second limiting groove 721, and the first gear 12 is installed at one end of the first screw rod 11. A push plate 9 is installed on the inner wall of the extrusion frame 7, and a plurality of first extrusion springs 101 are installed on the outer wall of one side of the push plate 9, and a second heat sealing block 10 is installed at one end of the first extrusion spring 101.

[0034] Furthermore; the upper end surface of the placement table 2 is designed as a slope, the outer wall of the sliding rod 62 and the inner wall of the extrusion frame 7 are slidably connected, and a smoothing rod 74 is installed on the outer wall of the extrusion frame 7 close to the placement table 2. The two ends of the first screw rod 11 are rotatably connected to the inner wall of the second limit groove 721, the first gear 12 and the outer wall of the first rack 63 are meshed and connected, the outer wall of the push plate 9 and the inner wall of the extrusion frame 7 are slidably connected, and the two ends of the push plate 9 are installed with a first limit block 91 slidably connected to the inner wall of the second limit groove 721, the inner wall of the first limit block 91 and the outer wall of the first screw rod 11 are threadedly connected, and a limit rod 102 is installed at one end of the second heat sealing block 10, and the outer wall of the limit rod 102 and the inner wall of the push plate 9 are slidably connected.

[0035] It should be noted that when the food inside the plastic packaging bag is sealed and preserved, the packaging bag is mounted on the placement table 2 and the end to be sealed is extended upward from the placement table 2. At this time, the hydraulic rod 5 is started to make the support plate 6 drive the extrusion frame 7 below to slide downward. During the sliding process, the smoothing rod 74 at the bottom of the extrusion frame 7 bends and squeezes the plastic film at the sealing position, and cooperates with the first heat sealing block 3 on one side of the placement table 2 to smooth the plastic films on both sides during the movement until the extrusion frame 7 and the surface of the heat sealing table 1 are in contact and fixed, so as to avoid the film from flattening during heat sealing, resulting in uneven heat and pressure. The heat is transferred to the film, causing uneven heating and overheating of some sealing areas, as well as inconsistent sealing strength and leaking of the seal. At the same time, it avoids wrinkles and folds in the unsmoothed plastic film during heat sealing, and prevents stress concentration at wrinkles and folds, which makes the seal fragile and easy to break, thereby improving the integrity of the package and the protection function of the internal food. The smoothing rod 74 at the lower end and the side of the placement table 2 smooth the plastic films on both sides of the seal, and after the plastic film is smoothed, the hydraulic rod 5 continues to move downward to make the second heat sealing block 10 and the first heat sealing block 3 inside the extrusion frame 7 cooperate to heat seal the seal of the plastic packaging bag.

[0036] Furthermore, a first mounting groove 71 is provided on the upper outer wall of the extrusion frame 7 near the second mounting groove 72, and first limiting grooves 711 are provided on the inner walls on both sides of the first mounting groove 71. The inner wall of the first limiting groove 711 is rotatably connected to the second screw rod 16, and a second gear 17 is installed at one end of the second screw rod 16. The inner wall of the first mounting groove 71 is slidably connected to the mounting block 13, and the two ends of the mounting block 13 are installed with second limiting blocks 131 slidably connected to the inner wall of the first limiting groove 711. The second limiting block 131 is The inner wall is threadedly connected to the outer wall of the second screw rod 16, and the sliding rod 62 is provided with a second rack 64 meshingly connected to the second gear 17. A mounting groove 132 is provided on one side of the mounting block 13, and a plurality of second extrusion springs 14 are installed on the inner wall of the mounting groove 132. A positioning block 15 slidably connected to the inner wall of the mounting groove 132 is installed on the side wall at one end of the second extrusion spring 14, and a positioning strip 151 is installed at the corner of one end of the positioning block 15, and the outer wall of the positioning strip 151 is slidably connected to the outer wall of the second heat sealing block 10.

[0037] It should be noted that: after the sealing portion is smoothed, the hydraulic rod 5 continues to slide down to drive the support plate 6 to compress the buffer spring 8 and continue to move down. At this time, the slide bars 62 on both sides of the support plate 6 move downward inside the extrusion frame 7. The first rack 63 and the second rack 64 on one side of the slide bar 62 respectively mesh with the first gear 12 and the second gear 17 during the sliding process, so that the first screw rod 11 rotates to drive the push plate 9 and the second screw rod 16 rotates to drive the mounting block 13 to move. The mounting block 13 moves faster than the push plate 9, and the outer wall of the positioning strip 151 and the second heat sealing block The second extrusion spring 14 is compressed so as not to hinder the movement of the push plate 9, thereby blocking the internal space of the packaging bag and the space at the heat seal, preventing harmful gases from entering the food packaging bag and contaminating the food inside, causing the food to deteriorate or carry toxic substances, thereby improving the safety of the food.

[0038] The working principle of this plastic packaging bag heat sealing processing device:

[0039] When sealing and preserving the food inside the plastic packaging bag, the packaging bag is installed on the placement table 2 and the end to be sealed is extended upward from the placement table 2. At this time, the hydraulic rod 5 is started to make the support plate 6 drive the extrusion frame 7 below to slide downward. During the sliding process, the smoothing rod 74 at the bottom of the extrusion frame 7 bends and squeezes the plastic film at the sealing position, and cooperates with the first heat-sealing block 3 on one side of the placement table 2 to smooth the plastic films on both sides during the movement until the extrusion frame 7 and the surface of the heat-sealing table 1 are in contact and remain fixed. The hydraulic rod 5 continues to slide down and drives the support plate 6 to compress the buffer spring 8 and continue to move downward. At this time, the slide bars 62 on both sides of the support plate 6 move downward inside the extrusion frame 7. The first rack 63 and the second rack 64 on one side of the slide bar 62 respectively mesh with the first gear 12 and the second gear 17 during the sliding process, so that the first screw rod 11 moves The push plate 9 is driven to rotate and the second screw rod 16 is driven to rotate and drive the mounting block 13 to move. The mounting block 13 moves faster than the push plate 9, and the outer wall of the positioning strip 151 contacts and slides with the second heat-sealing block 10 to avoid a cavity between the plastic film between the second heat-sealing block 10 and the positioning strip 151. The mounting block 13 drives the positioning block 15 inside the mounting groove 133 to move, and makes the positioning strip 151 tightly against the end of the heat-sealed part of the plastic film, and does not hinder the movement of the push plate 9 by compressing the second extrusion spring 14. At the same time, the push plate 9 drives the second heat-sealing block 10 on one side to move until the second heat-sealing block 10 and the plastic film are squeezed and cooperated with the first heat-sealing block 3 to complete the sealing operation. The sealing part can be smoothed while sealing to improve the sealing quality, and at the same time, the harmful gas generated by the sealing can be effectively prevented from entering the packaging bag and affecting the food.

[0040] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat-sealing treatment device for plastic packaging bags, comprising a heat-sealing table (1) and a fixing frame (4) and a pressing frame (7) arranged on the heat-sealing table (1), characterized in that: A placement platform (2) is installed on the heat sealing platform (1), and a first heat sealing block (3) is installed on an inner wall of one side of the placement platform (2); One end of the fixed frame (4) is fixedly connected to the upper outer wall of the heat sealing table (1), a hydraulic rod (5) is installed on the upper end of the fixed frame (4), and sliding grooves (41) are opened on the inner walls of both sides of the fixed frame (4), and a support plate (6) is installed on the output end of the hydraulic rod (5), and sliding blocks (61) slidably connected to the inner walls of the sliding grooves (41) are installed on both sides of the support plate (6), and two symmetrical sliding rods (62) are installed on the support plate (6), and a second rack (64) is installed on the outer wall of one side of the sliding rod (62); Fixed blocks (73) are installed at both ends of the extrusion frame (7), and a buffer spring (8) fixedly connected to one end of the slider (61) is installed on the fixed block (73); a second installation groove (72) is opened on one side of the extrusion frame (7), and second limiting grooves (721) are opened on the inner walls of both sides of the second installation groove (72); a first screw rod (11) is installed on the inner wall of the second limiting groove (721), and a first gear (12) is installed on one end of the first screw rod (11); a push plate (9) is installed on the inner wall of the extrusion frame (7), and a plurality of first extrusion springs (101) are installed on the outer wall of one side of the push plate (9), and a second heat sealing block (10) is installed on one end of the first extrusion spring (101).

2. A heat-sealing processing device for plastic packaging bags according to claim 1, characterized in that: The upper end surface of the placement platform (2) is designed as an inclined surface, the outer wall of the sliding rod (62) and the inner wall of the extrusion frame (7) are slidably connected, and a smoothing rod (74) is installed on the outer wall of the extrusion frame (7) on one side close to the placement platform (2).

3. A heat-sealing treatment device for plastic packaging bags according to claim 2, characterized in that: The two ends of the first screw rod (11) are rotatably connected to the inner wall of the second limiting groove (721), and the first gear (12) is meshingly connected to the outer wall of the first rack (63).

4. A heat-sealing treatment device for plastic packaging bags according to claim 3, characterized in that: The outer wall of the push plate (9) is slidably connected to the inner wall of the extrusion frame (7), and the first limit blocks (91) slidably connected to the inner wall of the second limit groove (721) are installed at both ends of the push plate (9), the inner wall of the first limit block (91) is threadedly connected to the outer wall of the first screw rod (11), and a limit rod (102) is installed at one end of the second heat sealing block (10), and the outer wall of the limit rod (102) is slidably connected to the inner wall of the push plate (9).

5. A heat-sealing processing device for plastic packaging bags according to claim 1, characterized in that: The extrusion frame (7) is provided with a first mounting groove (71) on the upper outer wall close to the second mounting groove (72), and first limiting grooves (711) are provided on the inner walls on both sides of the first mounting groove (71), and the inner walls of the first limiting groove (711) are rotatably connected to a second screw rod (16), and a second gear (17) is installed at one end of the second screw rod (16).

6. A heat-sealing treatment device for plastic packaging bags according to claim 5, characterized in that: The inner wall of the first mounting groove (71) is slidably connected to a mounting block (13), and second limiting blocks (131) slidably connected to the inner wall of the first limiting groove (711) are installed at both ends of the mounting block (13), and the inner wall of the second limiting block (131) is threadedly connected to the outer wall of the second screw rod (16).

7. A heat-sealing treatment device for plastic packaging bags according to claim 6, characterized in that: The slide bar (62) is provided with a second rack (64) meshingly connected with the second gear (17).

8. A heat-sealing treatment device for plastic packaging bags according to claim 7, characterized in that: A mounting groove (132) is provided on one side of the mounting block (13); a plurality of second extrusion springs (14) are installed on the inner wall of the mounting groove (132); a positioning block (15) slidably connected to the inner wall of the mounting groove (132) is installed on one end side wall of the second extrusion spring (14); a positioning strip (151) is installed at one end corner of the positioning block (15); and the outer wall of the positioning strip (151) is slidably connected to the outer wall of the second heat sealing block (10).

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