A packaging bag heat sealing mechanism

Abstract

The application relates to a packaging bag heat sealing mechanism and relates to the packaging technical field.The packaging bag heat sealing mechanism comprises a placing table and a heat sealing seat, the placing table is provided with a first driving element, the first driving element is used for driving the heat sealing seat to move in the direction away from or close to the placing table, the heat sealing seat is rotationally provided with a hot pressing roller, the heat sealing seat is provided with a second driving element used for driving the hot pressing roller to rotate, the heat sealing seat is provided with a heating element used for heating the hot pressing roller, and the heat sealing seat is provided with a scraper matched with the outer wall of the hot pressing roller. The application has the effect that plastic residues adhered to the hot pressing roller are scraped off, so that the plastic residues are prevented from adhering to the hot pressing roller and influencing the heat sealing effect of subsequent other packaging bags.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of packaging technology, in particular to a packaging bag heat sealing mechanism. BACKGROUND

[0002] At present, the plastic packaging industry requires plastic packaging bags to have certain strength and sealing performance to reduce the occurrence of packaging bag cracking and leakage during transportation. For the sealing of packaging bags, manufacturers often use heat seal machines to seal the opening of the packaging bag.

[0003] The hot air machine usually includes a driving member, a hot pressing block and a placing table. The packaging bag to be sealed is placed on the placing table. The driving member drives the hot pressing block to press down. The hot pressing block thus presses and heats the sealing position of the packaging bag. The sealing position of the packaging bag is then heated to a viscous state. After the hot pressing block moves away from the packaging bag, the two layers of film are fused together and maintain a certain strength after cooling.

[0004] In actual operation, the hot pressing block has a high heating temperature and reciprocally presses and heats the packaging bag. Over a long period of time, the position of the hot pressing block contacting the packaging bag is prone to sticking to plastic residues. If the residues are not cleaned in time, it may affect the heat sealing effect of subsequent packaging bags, which needs to be further improved. SUMMARY

[0005] In order to improve the problems in the above-mentioned technology, the present application provides a packaging bag heat sealing mechanism.

[0006] The packaging bag heat sealing mechanism provided by the present application adopts the following technical solution:

[0007] A packaging bag heat sealing mechanism, comprising a placing table and a heat sealing seat, the placing table is provided with a first driving member, the first driving member is used to drive the heat sealing seat to move away from or close to the placing table, the heat sealing seat is provided with a hot pressing roller rotatingly arranged thereon, the heat sealing seat is provided with a second driving member used to drive the hot pressing roller to rotate, the heat sealing seat is provided with a heating member used to heat the hot pressing roller, and the heat sealing seat is provided with a scraper abutting against the outer wall of the hot pressing roller.

[0008] By adopting the technical scheme, when the packaging bag is subjected to heat sealing treatment, the packaging bag is placed on the placement table, and then the heat sealing seat is driven to move in the direction close to the placement table by the first driving member, the heat sealing seat drives the hot press roller to move in the direction close to the packaging bag, the heating member simultaneously heats the hot press roller, so that the hot press roller has a high temperature, until the hot press roller is attached to the packaging bag and presses the packaging bag, thereby completing the heat sealing treatment of the packaging bag; when the hot press roller completes the heat pressing of a single packaging bag, or when the hot press roller completes the heat pressing of multiple packaging bags, and the hot press roller needs to be cleaned, the hot press roller is driven to rotate by the second driving member, and in the process of rotating, the scraper is always attached to the outer wall of the hot press roller, so that the plastic residues adhered to the hot press roller are scraped off, so as to avoid the plastic residues adhered to the hot press roller, and to avoid affecting the heat sealing effect of subsequent other packaging bags.

[0009] Optionally, the heat sealing seat is provided with a collection chamber, the scraper is inclinedly arranged from high to low in the direction close to the collection chamber, and a material guiding channel is formed between the scraper and the heat sealing seat and communicates with the collection chamber.

[0010] By adopting the technical scheme, the scraper is attached to the outer wall of the hot press roller, and the plastic residues scraped off by the scraper fall on the scraper, and under the action of gravity, the plastic residues fall in the direction close to the collection chamber, thereby falling into the collection chamber through the material guiding channel, and the plastic residues are collected in the collection chamber, so as to avoid the plastic residues scraped off from falling randomly on the placement table, thereby affecting the packaging bag subjected to heat sealing treatment.

[0011] Optionally, the scraper is slidably provided with a mounting plate, the material guiding channel is provided with a third driving member for driving the mounting plate to slide in the direction away from or close to the collection chamber, and the mounting plate is slidably provided with a movable plate, and the mounting plate is provided with a fourth driving member for driving the movable plate to slide to be attached to the scraper.

[0012] By adopting the technical scheme, since the plastic residues are light in weight, a small part of the plastic residues may be difficult to naturally fall into the collection chamber, and the plastic residues may randomly float in the material guiding channel, thereby affecting the subsequent cleaning of the heat sealing mechanism, at this time, the mounting plate can be driven to slide by the third driving member, the mounting plate drives the movable plate to slide in the direction from the hot press roller to the collection chamber, and in this process, the fourth driving member drives the movable plate to continuously slide, so that the movable plate can be attached to the inclined scraper in the process of moving, thereby pushing the plastic residues on the scraper into the collection chamber.

[0013] Optionally, a sliding cavity is formed in the mounting plate, and the end of the movable plate away from the scraper is slidably arranged in the sliding cavity; the fourth driving member comprises an air extractor arranged in the sliding cavity; and the movable plate is provided with a material suction channel, which is in communication with the air suction port of the air extractor through the sliding cavity.

[0014] By using the above technical scheme, the air extractor can perform air suction and blowing. When the movable plate needs to be driven to slide so as to be attached to the scraper, the air extractor operates to blow air through the air suction port. The air blown out of the air suction port pushes the movable plate to slide in the sliding cavity, and the end of the movable plate outside the sliding cavity is kept attached to the scraper under the pushing of the air flow. When the movable plate pushes the plastic residues on the scraper into the collecting chamber, the mounting plate is driven by the third driving member to move towards the heat press roller, and the movable plate is thus moved to above the attachment position of the heat press roller and the scraper. At the same time, the air extractor performs air suction to adsorb the plastic residues accumulated at the attachment position of the heat press roller and the scraper, and the plastic residues are thus adsorbed into the material suction channel. Then, the mounting plate drives the movable plate to slide into the collecting chamber, and the air extractor blows air again to blow the plastic residues in the material suction channel into the collecting chamber. In the above process, the cooperation of the components not only realizes the driving and sliding of the movable plate, but also realizes more thorough cleaning of the plastic residues, so as to avoid the plastic residues from being accumulated in the gap between the heat press roller and the scraper for a long time, which affects the rotation of the heat press roller and causes the heat press roller to be stuck. In addition, the heat press roller is prevented from continuously rubbing against the plastic residues in the long and repeated rotation process, and the plastic residues are prevented from being heated and generating a flame under the double influence of the high temperature of the heat press roller, thereby avoiding the occurrence of safety hazards.

[0015] Optionally, the end of the material suction channel away from the scraper is provided with a filter plate.

[0016] By using the above technical scheme, the filter plate in the material suction channel is used to filter and hinder the plastic residues, so as to avoid the plastic residues from entering the sliding cavity and affecting the subsequent sliding of the movable plate.

[0017] Optionally, a closing plate is rotatably arranged at the opening of the collecting chamber, and the collecting chamber is provided with a fifth driving member for driving the closing plate to rotate to close the collecting chamber.

[0018] By adopting the above technical scheme, when the movable plate pushes the plastic residues on the scraper to the opening of the collecting chamber, the fifth driving member drives the closing plate to rotate, so that the plastic residues can fall into the collecting chamber; and after the collecting chamber completes the collection of the plastic residues, the fifth driving member drives the closing plate to rotate back to position, so that the closing plate closes the collecting chamber, thereby avoiding that the plastic residues in the collecting chamber are affected when the air extractor subsequently performs air extraction, escape into the suction channel, and cause a large amount of plastic residues to accumulate in the suction channel, resulting in blockage of the suction channel.

[0019] Optionally, a fixing shaft is arranged at the opening of the collecting chamber, a rotating sleeve is fixed on the closing plate and sleeved on the fixing shaft, and a jacking rod for jacking the closing plate to rotate is arranged on the mounting plate; the fifth driving member comprises a torsion spring sleeved on the fixing shaft, one end of the torsion spring is fixedly connected with the fixing shaft, and the other end is fixedly connected with the rotating sleeve.

[0020] By adopting the above technical scheme, when the mounting plate moves to the opening of the collecting chamber, the jacking rod jacks the closing plate to rotate, so that the opening of the collecting chamber is opened and the plastic residues can enter the collecting chamber; in this process, the rotating sleeve rotates with the closing plate, and the torsion spring is in a twisted and deformed state; after the mounting plate moves away from the collecting chamber, the jacking rod moves away from the closing plate with the movement of the mounting plate, the closing plate is no longer jacked, the torsion spring is subsequently reset, thereby driving the rotating sleeve to rotate back to position, and further driving the closing plate to reset, so that the closing plate closes the collecting chamber, thereby achieving driving of the closing plate without an additional power source.

[0021] Optionally, an arc-shaped groove that matches the outer wall of the hot-pressing roller is formed in the placement table.

[0022] By adopting the above technical scheme, the packaging bag is placed on the arc-shaped groove, and then the first driving member drives the hot-pressing roller to press down, so that the packaging bag is clamped between the arc-shaped groove and the hot-pressing roller; the setting of the arc-shaped groove expands the range of the packaging bag in contact with the hot-pressing roller, i.e., the range of the area subjected to heat pressing, thereby making the heat sealing treatment effect better.

[0023] Optionally, a limiting seat is arranged on the placement table, a limiting cavity is formed in the limiting seat, and the packaging bag is located in the limiting cavity.

[0024] When the packaging bag is placed on the placement table, the area to be heat-sealed is located on the arc-shaped groove, and the area not to be heat-sealed is located in the limiting cavity. When the hot press roller is pressed to press the packaging bag in part between the arc-shaped groove and the hot press roller, the area of the packaging bag not pressed will be pried under the pressing of the hot press roller. When the hot press roller moves away from the packaging bag, the pried area of the packaging bag may move unstably during the falling process, which may cause the packaging bag to fall off the placement table and be contaminated. Therefore, the position of the packaging bag is limited by the limiting cavity to avoid the above situation.

[0025] Optionally, the placement table comprises a conveying table and a conveying belt, the conveying belt is rotationally arranged on the conveying table, and the arc-shaped groove and the limiting seat are arranged on the conveying table. A cold air cavity is formed in the limiting seat, an air outlet is formed in the limiting seat and communicates with the cold air cavity, and a cold air fan is arranged on the limiting seat and communicates with the cold air cavity.

[0026] By adopting the above technical scheme, the conveying belt is rotationally arranged on the conveying table and is used to support and convey the packaging bag. After the hot press roller is pressed against the packaging bag, the first driving member drives the hot press roller to move away from the packaging bag, and then the conveying belt rotates to drive the packaging bag to move away from the hot press roller. In this process, the cold air fan operates, the air outlet of the cold air fan conveys cold air to the cold air cavity, and the cold air is blown to the packaging bag through the air outlet, so as to cool the packaging bag after heat-sealing, thereby enabling the packaging bag to be quickly cooled and maintaining a certain strength, avoiding cracking or deformation of the area of the packaging bag subjected to heat-sealing in the later period.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. When the hot press roller completes heat pressing of a single packaging bag or when the hot press roller completes heat pressing of multiple packaging bags, the hot press roller needs to be cleaned. The second driving member drives the hot press roller to rotate. During the rotation of the hot press roller, the scraper is always attached to the outer wall of the hot press roller, so as to scrape off the plastic residues adhered to the hot press roller, thereby avoiding the plastic residues adhered to the hot press roller and affecting the heat sealing effect of subsequent other packaging bags.

[0029] 2. In addition to driving the sliding of the movable plate, the plastic residues can be more thoroughly cleaned to avoid the plastic residues being accumulated in the gap between the hot press roller and the scraper for a long time, so as to affect the rotation of the hot press roller and cause the hot press roller to be stuck. At the same time, the hot press roller continuously rubs against the plastic residues during the long and reciprocating rotation process, and under the double influence of the high temperature of the hot press roller, the plastic residues generate heat and cause a fire, thereby causing a safety hazard.

[0030] 3. When the heat pressing roller pair heat presses the packaging bag, the first driving member drives the heat pressing roller to move away from the packaging bag, and the conveying belt is then rotated to drive the packaging bag to move away from the heat pressing roller synchronously. In this process, the air cooler operates, and the air outlet of the air cooler delivers cold air to the cold air cavity. The cold air is blown to the packaging bag through the air outlet, so as to cool the packaging bag after heat sealing treatment. In this way, the packaging bag can be quickly cooled to maintain a certain strength, avoiding cracking or deformation of the area of the packaging bag after heat sealing treatment in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the overall structure of a packaging bag heat sealing mechanism in the embodiment of the application;

[0032] Figure 2 is a side view of the embodiment of the application;

[0033] Figure 3 is a sectional view of the embodiment of the application;

[0034] Figure 4 is Figure 3 is an enlarged view of part A in FIG. 1;

[0035] Figure 5 is a sectional view of the cooperation of the heat sealing seat, the collecting chamber and the heat pressing roller in the embodiment of the application;

[0036] Figure 6 is Figure 3 is an enlarged view of part B in FIG. 1;

[0037] Figure 7 is Figure 3 is an enlarged view of part C in FIG. 1.

[0038] BRIEF DESCRIPTION OF DRAWINGS: 1, placement table; 101, conveying table; 102, conveying belt; 2, heat sealing seat; 3, first driving member; 301, first telescopic rod; 4, heat pressing roller; 5, second driving member; 51, driving motor; 6, heating member; 61, heating pipe; 7, scraper; 8, collecting chamber; 9, material guiding channel; 10, mounting plate; 11, movable plate; 12, sliding cavity; 13, air extractor; 14, material suction channel; 15, filter plate; 16, closing plate; 17, fixed shaft; 18, rotating sleeve; 19, jacking rod; 20, torsional spring; 21, arc-shaped groove; 22, limiting seat; 23, limiting cavity; 24, air cooler; 25, cold air cavity; 26, air outlet; 27, heating cavity; 28, mounting bracket; 29, mounting groove; 30, second telescopic rod; 31, mounting block. DETAILED DESCRIPTION

[0039] The application will be further described in detail below with reference to the accompanying drawings. Figures 1-7 The application will be further described in detail below with reference to the accompanying drawings.

[0040] The embodiment of the application discloses a packaging bag heat sealing mechanism. Figure 1 and Figure 2 The packaging bag heat sealing mechanism comprises a placing table 1 and a heat sealing seat 2, the placing table 1 is provided with a first driving part 3, the first driving part 3 is used for driving the heat sealing seat 2 to move in the direction away from or close to the placing table 1, the heat sealing seat 2 is rotationally provided with a hot pressing roller 4, the heat sealing seat 2 is provided with a second driving part 5 used for driving the hot pressing roller 4 to rotate, the heat sealing seat 2 is provided with a heating part 6 used for heating the hot pressing roller 4, and the heat sealing seat 2 is provided with a scraper 7 abutting against the outer wall of the hot pressing roller 4.

[0041] Referring to Figure 2 and Figure 3 The hot pressing roller 4 is provided with a ring-shaped heating cavity 27, the heating part 6 comprises a heating pipe 61 installed in the heating cavity 27, the heating pipe 61 is spirally wound in the whole hot pressing roller 4, and the hot pressing roller 4 is heated through the operation of the heating pipe 61; the second driving part 5 comprises a driving motor 51 installed on the heat sealing seat 2, the output shaft of the driving motor 51 is fixedly connected with the central shaft of the hot pressing roller 4 in a coaxial mode, and the hot pressing roller 4 is driven to rotate through the operation of the output shaft of the driving motor 51.

[0042] Referring to Figure 2 and Figure 3 The conveying belt 102 comprises a conveying table 101 and the conveying belt 102, the conveying belt 102 is rotationally arranged on the conveying table 101, a plurality of arc-shaped grooves 21 abutting against the outer wall of the hot pressing roller 4 are arranged on the conveying belt 102 at intervals, a limiting seat 22 is arranged on the conveying belt 102 and located at one side of the arc-shaped groove 21, and a limiting cavity 23 is formed in the limiting seat 22; when the packaging bag is conveyed through the conveying belt 102, a single packaging bag is located in the limiting cavity 23 and abuts against the conveying belt 102.

[0043] When the packaging bag is located on the conveying belt 102, the region to be subjected to heat sealing treatment is located on the arc-shaped groove 21, and the region not subjected to heat sealing treatment is located in the limiting cavity 23; when the hot pressing roller 4 presses the packaging bag and the region of the packaging bag between the arc-shaped groove 21 and the hot pressing roller 4 is pressed tightly, the range of the packaging bag in contact with the hot pressing roller 4, i.e. the range of the region subjected to heat pressing, is expanded through the arrangement of the arc-shaped groove 21, so that the heat sealing treatment effect is better.

[0044] Referring to Figure 4 The limiting seat 22 is provided with a cold air cavity 25, the limiting seat 22 is provided with an air outlet 26 communicating with the cold air cavity 25, the air outlet direction of the air outlet 26 is towards the arc-shaped groove 21, and the limiting seat 22 is provided with a cold air fan 24, and the air outlet 26 of the cold air fan 24 communicates with the cold air cavity 25.

[0045] When the heat sealing roller 4 is away from the packaging bag, the conveying belt 102 is driven to rotate to drive the packaging bag to move away from the heat sealing roller 4, and the cold air machine 24 is operated to cool the packaging bag.

[0046] With reference to Figure 2 and Figure 3 , the conveying table 101 is fixed with a mounting frame 28 in the shape of a door, and the first driving member 3 comprises a first electric telescopic rod 301 mounted on the top of the mounting frame 28, which is vertically arranged, and the fixed end of the first electric telescopic rod 301 is fixed to the mounting frame 28, and the movable end of the first electric telescopic rod 301 is fixed to the heat sealing seat 2, so that the heat sealing seat 2 is driven to move vertically by the telescopic movement of the movable end of the first electric telescopic rod 301.

[0047] With reference to Figure 3 , the heat sealing seat 2 is provided with a collecting chamber 8, and the scraper 7 is arranged from high to low in the direction of approaching the collecting chamber 8, and a material guiding channel 9 is formed between the scraper 7 and the heat sealing seat 2, which is in communication with the collecting chamber 8.

[0048] The scraper 7 is attached to the outer wall of the heat sealing roller 4, and the plastic residues scraped off by the scraper 7 fall on the scraper 7, and under the action of gravity, the plastic residues fall in the direction of approaching the collecting chamber 8, thereby falling into the collecting chamber 8 through the material guiding channel 9, and the plastic residues are collected through the collecting chamber 8, so as to avoid the plastic residues scraped off from falling randomly on the conveying belt 102.

[0049] With reference to Figure 5 and Figure 6 , the heat sealing seat 2 is provided with a horizontally arranged mounting groove 29, which is in communication with the material guiding channel 9, and the second telescopic rod 30 is installed in the mounting groove 29, which is an electric telescopic rod and is horizontally arranged; the mounting plate 10 is horizontally slidably arranged in the material guiding channel 9, and the mounting plate 10 is integrally formed with a mounting block 31 on the top thereof, the mounting block 31 is located in the mounting groove 29 and is in sliding cooperation with the mounting groove 29, the fixed end of the second telescopic rod 30 is fixed in the mounting groove 29, and the movable end of the second telescopic rod 30 is fixed to the mounting block 31, so that the mounting plate 10 is driven to slide horizontally in the direction of approaching or moving away from the collecting chamber 8 by the telescopic movement of the movable end of the second telescopic rod 30.

[0050] In the embodiment, the second driving member 5 is selected as the second telescopic rod 30.

[0051] With reference to Figure 6 , the sliding cavity 12 is provided in the mounting plate 10, and the movable plate 11 vertically slides in the sliding cavity 12. The end of the movable plate 11 close to the scraper 7 is located outside the sliding cavity 12 and is attached to the scraper 7. A sliding groove (not shown in the figure) is provided in the movable plate 11 and is in communication with the sliding cavity 12. The sliding groove is vertically arranged, and a sliding block (not shown in the figure) is integrally formed on the movable plate 11 and is slidingly connected in the sliding groove. When the sliding block slides in the sliding groove, the movable plate 11 synchronously slides in the sliding cavity 12. When the sliding block slides to abut against the end wall of the sliding groove, the sliding block cannot continue to slide in the same direction, and at this time, the synchronous sliding of the movable plate 11 is also limited. Thus, the cooperation of the sliding block and the sliding groove avoids the movable plate 11 from separating from the sliding cavity 12.

[0052] With reference to Figure 6 , the sliding cavity 12 is provided with an air extractor 13, and the air extractor 13 can perform air extraction and air blowing. The movable plate 11 is provided with a material suction channel 14, and the top of the material suction channel 14 is provided with a filter plate 15. The material suction channel 14 is in communication with the air extraction port of the air extractor 13 through the sliding cavity 12.

[0053] Since the residual plastic has a relatively light weight, a small part of the residual plastic may be difficult to naturally fall into the collection chamber 8, and the residual plastic may randomly float in the material guide channel 9, thereby affecting the subsequent cleaning of the heat sealing mechanism. At this time, the second telescopic rod 30 can drive the mounting plate 10 to slide, and the mounting plate 10 drives the movable plate 11 to slide in the direction close to the collection chamber 8. In this process, the air extractor 13 operates to blow air through the air extraction port. The air blown out of the air extraction port pushes the movable plate 11 to slide in the sliding cavity 12, and the end of the movable plate 11 outside the sliding cavity 12 is kept attached to the scraper 7 under the pushing of the airflow, thereby pushing the residual plastic on the scraper 7 into the collection chamber 8.

[0054] When the movable plate 11 pushes the residual plastic on the scraper 7 into the collection chamber 8, the second telescopic rod 30 can drive the mounting plate 10 to move in the direction close to the heat press roller 4. The movable plate 11 moves with the mounting plate 10 to the position above the position where the heat press roller 4 is attached to the scraper 7. At the same time, the air extractor 13 performs air extraction, thereby adsorbing the residual plastic accumulated at the position where the heat press roller 4 is attached to the scraper 7. The residual plastic is thereby adsorbed into the material suction channel 14. The mounting plate 10 then drives the movable plate 11 to slide into the collection chamber 8, and the air extractor performs air blowing to blow the residual plastic in the material suction channel into the collection chamber 8.

[0055] With reference to Figure 7The opening of the collecting chamber 8 is provided with a fixed shaft 17, a rotating sleeve 18 is coaxially connected to the fixed shaft 17, a closing plate 16 is fixed to the rotating sleeve 18, the closing plate 16 is used to close the collecting chamber 8, so that the material guiding channel 9 is not communicated with the collecting chamber 8, and a top rod 19 is arranged on the mounting plate 10 and used to top the closing plate 16 to rotate, a torsional spring 20 is sleeved on the fixed shaft 17, one end of the torsional spring 20 is fixedly connected with the fixed shaft 17, and the other end is fixedly connected with the rotating sleeve 18.

[0056] When the mounting plate 10 moves to the opening of the collecting chamber 8, the top rod 19 in movement tops the closing plate 16, so that the closing plate 16 rotates, the opening of the collecting chamber 8 is opened, and the plastic residues can enter the collecting chamber 8, in the process, the rotating sleeve 18 rotates along with the closing plate 16, and the torsional spring 20 is in a torsional deformation state; after the mounting plate 10 moves away from the collecting chamber 8, the top rod 19 moves away from the closing plate 16 along with the movement of the mounting plate 10, the closing plate 16 is no longer topped, the torsional spring 20 is reset subsequently, the rotating sleeve 18 is driven to rotate and reset, and the closing plate 16 is reset, so that the closing plate 16 closes the collecting chamber 8, to avoid that the plastic residues in the collecting chamber 8 are affected when the air extractor 13 performs air extraction subsequently, escape into the material suction channel 14, and a large amount of plastic residues are accumulated in the material suction channel 14, causing the material suction channel 14 to be blocked.

[0057] The implementation principle of the packaging bag heat sealing mechanism is as follows: when the packaging bag is subjected to heat sealing treatment, the packaging bag is placed on the conveying belt 102, and then the heat sealing seat 2 is driven by the first telescopic rod 301 to move in the direction of approaching the conveying belt 102, the heat sealing seat 2 drives the hot roller 4 to move in the direction of approaching the packaging bag, and the heating pipe 61 simultaneously heats the hot roller 4, so that the hot roller 4 has a high temperature, until the hot roller 4 is attached to the packaging bag and presses the packaging bag, thereby completing the heat sealing treatment of the packaging bag; when the hot roller 4 completes the heat pressing of a single packaging bag, or when the hot roller 4 completes the heat pressing of multiple packaging bags, and the hot roller 4 needs to be cleaned, the hot roller 4 is driven to rotate by the driving motor 51, and the scraper 7 is always attached to the outer wall of the hot roller 4 in the process of rotation of the hot roller 4, so as to scrape off the plastic residues adhered to the hot roller 4, to avoid that the plastic residues adhere to the hot roller 4 and affect the heat sealing effect of subsequent other packaging bags.

[0058] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A bag heat sealing mechanism characterized by: The application relates to a heat sealing device, which comprises a placing table (1) and a heat sealing seat (2), wherein a first driving element (3) is arranged on the placing table (1) and used to drive the heat sealing seat (2) to move in a direction away from or close to the placing table (1), a hot pressing roller (4) is rotatably arranged on the heat sealing seat (2), a second driving element (5) is arranged on the heat sealing seat (2) and used to drive the hot pressing roller (4) to rotate, a heating element (6) is arranged on the heat sealing seat (2) and used to heat the hot pressing roller (4), and a scraper (7) is arranged on the heat sealing seat (2) and abuts against the outer wall of the hot pressing roller (4). A collecting chamber (8) is arranged on the heat sealing seat (2), the scraper (7) is arranged in a high-to-low inclined mode in a direction close to the collecting chamber (8), a material guiding channel (9) is formed between the scraper (7) and the heat sealing seat (2), and the material guiding channel (9) communicates with the collecting chamber (8). A mounting plate (10) is slidably arranged on the scraper (7), a third driving element is arranged in the material guiding channel (9) and used to drive the mounting plate (10) to slide in a direction away from or close to the collecting chamber (8), an active plate (11) is slidably arranged on the mounting plate (10), and a fourth driving element is arranged on the mounting plate (10) and used to drive the active plate (11) to slide to abut against the scraper (7). A sliding cavity (12) is formed in the mounting plate (10), one end of the active plate (11) away from the scraper (7) is slidably arranged in the sliding cavity (12), the fourth driving element comprises an air extractor (13) arranged in the sliding cavity (12), and a material suction channel (14) is formed in the active plate (11) and communicates with the air suction port of the air extractor (13) through the sliding cavity (12). One end of the material suction channel (14) away from the scraper (7) is provided with a filter plate (15). A closing plate (16) is rotatably arranged at the opening of the collecting chamber (8), and a fifth driving element is arranged on the collecting chamber (8) and used to drive the closing plate (16) to rotate to close the collecting chamber (8).

2. A bag heat sealing mechanism according to claim 1, wherein: A fixing shaft (17) is arranged at the opening of the collecting chamber (8), a rotating sleeve (18) is fixed on the closing plate (16), the rotating sleeve (18) is sleeved on the fixing shaft (17), a jacking rod (19) is arranged on the mounting plate (10) and used to jack the closing plate (16) to rotate, and the fifth driving element comprises a torsional spring (20) sleeved on the fixing shaft (17), one end of the torsional spring (20) is fixedly connected with the fixing shaft (17), and the other end is fixedly connected with the rotating sleeve (18).

3. A bag heat sealing mechanism according to claim 1, wherein: An arc-shaped groove (21) is formed in the placing table (1) and matches the outer wall of the hot pressing roller (4).

4. A bag heat sealing mechanism according to claim 3, wherein: A limiting seat (22) is arranged on the placing table (1), a limiting cavity (23) is formed in the limiting seat (22), and a packaging bag is arranged in the limiting cavity (23).

5. A bag heat sealing mechanism according to claim 4, wherein: The placing table (1) comprises a conveying table (101) and a conveying belt (102), the conveying belt (102) is rotationally arranged on the conveying table (101), the arc-shaped groove (21) and the limiting seat (22) are arranged on the conveying table (101); the limiting seat (22) is provided with a cold air cavity (25), the limiting seat (22) is provided with an air outlet (26) communicated with the cold air cavity (25), and the limiting seat (22) is provided with a cold air fan (24), and the air outlet (26) of the cold air fan (24) is communicated with the cold air cavity (25).

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