Sealing mechanism for plastic bag fillet forming

Abstract

The utility model discloses a plastic bag fillet forming sealing mechanism which comprises a machining table and supporting plates, the supporting plates are arranged on the two sides of the top of the machining table, an outer cover is arranged on the side, connected with the supporting plates, of the machining table, a second motor is arranged on the other side of the outer cover, and the output end of the second motor extends into the outer cover to be provided with a first gear. And a connecting shaft is arranged on the other side in the outer cover, a second gear is arranged on the connecting shaft in the outer cover, the second gear is meshed with the first gear, the connecting shaft in the outer cover and an output shaft of the second motor extend to the inner side of the machining table and the inner side of the supporting plate to be fixedly connected with conveying shafts, and conveying rollers are arranged on the conveying shafts. The two ends of the plastic bag are pressed during conveying and cutting, automatic cutting and heat sealing are facilitated, different cutting knives can be replaced, and different plastic bags with round corners or flat corners can be cut conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag forming, in particular to a sealing mechanism for forming rounded corners of plastic bags. Background Technique

[0002] Plastic bags are bags mainly made of plastics (common plastics include polypropylene, polyester, nylon, etc.), which are essential items in people's daily lives and are often used to hold other items. Among them, rounded-corner plastic bags have stronger applicability.

[0003] For example, a plastic bag rounded-corner forming and sealing mechanism disclosed in the patent application No. 202020592862.9 includes a bottom plate. A cutting groove is opened at the top of the bottom plate. Hydraulic push rods are fixedly connected to both the left and right sides of the bottom plate. The top ends of the hydraulic push rods are fixedly connected with lifting plates. A driving plate is fixedly connected between the tops of the two lifting plates. Driving motors are fixedly connected to both the left and right sides of the driving plate. The output shafts of the driving motors are fixedly connected with winding wheels. A traction rope is fixedly connected to the outer side of the winding wheel. Universal wheels are fixedly connected to the opposite ends of the two traction ropes. A sliding rod is fixedly connected between the opposite sides of the two universal wheels. A sealing heating head is fixedly connected to the bottom of the sliding rod. A cutting knife is fixedly connected to the left side of the sliding rod. Two guiding columns are fixedly connected to the top of the bottom plate. A limiting block is fixedly connected to the top of the guiding column. A guiding hole is opened at the top of the driving plate. The hydraulic push rod drives the lifting plate to move downward along the guiding column, so that the sealing heating head presses the plastic bag. The cutting knife is inserted into the inner side of the cutting groove. Then, the corresponding winding wheel is driven to rotate by the driving motor. The winding wheel drives the traction rope to pull the universal wheel, so that the sliding rod moves rightward along the guiding hole. The sliding rod moves in an arc along the guiding hole, so that the sealing heating head moves in an arc to perform rounded-corner sealing on the plastic bag. Then, the cutting knife synchronously cuts the plastic bag. The sealing and cutting are integrated, and the efficiency is high. However, when it is actually used, there are still some deficiencies. It cannot press both ends of the plastic bag, which may cause the other end to warp during cutting and heat sealing, thus affecting the cutting effect. Moreover, it cannot replace different cutting blocks according to customer needs to cut different rounded corners or flat corners. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing mechanism for forming rounded corners of plastic bags to solve the problems raised in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical solutions: A sealing mechanism for forming rounded corners of plastic bags, comprising a processing table and a support plate. On both sides of the top of the processing table, support plates are provided, and on one side where the processing table and the support plate are connected, an outer cover is provided. On the other side of the outer cover, a second motor is provided, and the output end of the second motor extends into the outer cover and is provided with a first gear. On the other side inside the outer cover, a connecting shaft is provided, and a second gear is provided on the connecting shaft inside the outer cover. The second gear meshes with the first gear. The connecting shaft inside the outer cover and the output shaft of the second motor both extend to the inside of the processing table and the support plate and are fixedly connected with a transmission shaft, and transmission rollers are provided on the transmission shafts.

[0006] Preferably, at the top of the support plate on one side of the processing table, a first motor is provided, and the output end of the first motor penetrates through the support plate and is fixedly connected with a lead screw, and a transmission block is provided on the lead screw.

[0007] Preferably, between the other sides inside the support plate, a slide bar parallel to the lead screw is provided, and a slider corresponding to the transmission block is provided on the slide bar, and a connecting plate is provided between the slider and the transmission block.

[0008] Preferably, a pressing air cylinder is provided on the top of the connecting plate, and the output end of the pressing air cylinder extends to the bottom of the connecting plate and is fixedly connected with a motor cover, and a rotating motor is provided inside the motor cover.

[0009] Preferably, the output end of the rotating motor penetrates through the motor cover and is fixedly connected with a rotating shaft, and a rotating block is fixedly connected to the bottom of the motor cover through the rotating shaft.

[0010] Preferably, a cutting block is fixedly connected to one side of the rotating block through a bolt, and a hot cutting knife is provided on the side of the bottom of the cutting block away from the rotating block.

[0011] Preferably, an extrusion roller is provided between the support plates at the bottom end of the rotating block away from the transmission roller, and a conveyor belt is provided inside the processing table below the extrusion roller.

[0012] Preferably, an opening is provided at the top of the processing table, and a driving mechanism is provided on one side of the processing table, and the driving mechanism on one side of the processing table is connected to the conveyor belt and the extrusion roller.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the sealing mechanism for forming rounded corners of the plastic bag, the second motor drives the first gear on its shaft to rotate, the first gear drives the second gear meshing with it to rotate, and the first gear and the second gear drive the conveying drum on the conveying shaft to rotate in a certain direction to press and convey the plastic bag. When cutting, the other side of the plastic bag can be extruded by the extrusion drum to prevent the plastic bag from wrinkling and deforming during cutting, which affects the cutting and heat-sealing effect of the plastic bag. Moreover, when cutting, the pressing cylinder, the first motor, the rotating motor and the hot cutting knife can be started in cooperation through the control system, so that the hot cutting knife can cut out rounded corners, realizing automatic cutting and heat-sealing, and the cutting block can be replaced according to needs, which is convenient for cutting plastic bags with different rounded corners or flat corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic side view structure diagram of the present utility model;

[0015] Figure 2 is a schematic side sectional view structure diagram of the present utility model;

[0016] Figure 3 is a schematic top view structure diagram of the support plate, lead screw and slide bar of the present utility model;

[0017] Figure 4 is a schematic front sectional view structure diagram of the conveying drum and the outer cover of the present utility model;

[0018] Figure 5 of the present utility model Figure 2 enlarged structure diagram at position A in;

[0019] In the figure: 1, processing table; 2, support plate; 3, pressing cylinder; 4, outer cover; 5, conveyor belt; 6, extrusion drum; 7, slider; 8, connecting plate; 9, rotating motor; 10, motor cover; 11, transmission block; 12, first motor; 13, lead screw; 14, slide bar; 15, second motor; 16, first gear; 17, second gear; 18, conveying shaft; 19, conveying drum; 20, rotating block; 21, cutting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 - 5, an embodiment provided by the present utility model: a sealing mechanism for forming rounded corners of plastic bags, including a processing table 1 and a support plate 2. On both sides of the top of the processing table 1, support plates 2 are provided, and on one side where the processing table 1 and the support plate 2 are connected, there is an outer cover 4. On the other side of the outer cover 4, there is a second motor 15, and the output end of the second motor 15 extends into the outer cover 4 and is provided with a first gear 16. On the other side inside the outer cover 4, there is a connecting shaft, and a second gear 17 is provided on the connecting shaft inside the outer cover 4, and the second gear 17 meshes with the first gear 16. The connecting shaft inside the outer cover 4 and the output shaft of the second motor 15 both extend to the inside of the processing table 1 and the support plate 2 and are fixedly connected with a transmission shaft 18, and transmission rollers 19 are provided on the transmission shaft 18. The second motor 15 drives the first gear 16 on its shaft to rotate, the first gear 16 drives the second gear 17 meshing with it to rotate, and the first gear 16 and the second gear 17 drive the transmission rollers 19 on the transmission shaft 18 to rotate in one direction to convey the plastic bag. During conveyance, the plastic bag can also be pressed to prevent wrinkles from being generated in the plastic bag during cutting, which affects the heat sealing effect of the plastic bag;

[0022] At the top of the support plate 2 on one side of the processing table 1, there is a first motor 12, and the output end of the first motor 12 penetrates through the support plate 2 and is fixedly connected with a lead screw 13. A transmission block 11 is provided on the lead screw 13. Between the other two sides inside the support plate 2, there is a slide bar 14 parallel to the lead screw 13, and a slider 7 corresponding to the transmission block 11 is provided on the slide bar 14. A connecting plate 8 is provided between the slider 7 and the transmission block 11. At the top of the connecting plate 8, there is a pressing cylinder 3, and the output end of the pressing cylinder 3 extends to the bottom of the connecting plate 8 and is fixedly connected with a motor cover 10. A rotary motor 9 is provided inside the motor cover 10. The output end of the rotary motor 9 penetrates through the motor cover 10 and is fixedly connected with a rotating shaft, and the bottom of the motor cover 10 is fixedly connected with a rotating block 20 through the rotating shaft. When the staff starts the pressing cylinder 3, the first motor 12, the rotary motor 9, and the hot cutting knife through the cooperation of the control system, the pressing cylinder 3 can drive the hot cutting knife to press down. At the same time, the first motor 12 can drive the transmission block 11 on the lead screw 13 to move, so that the transmission block 11 drives the connecting plate 8 to move. The connecting plate 8 moves stably through the transmission block 11 and the slider 7 on the lead screw 13 and the slide bar 14, which is convenient for cooperating with the rotation of the rotating block 20 connected to the rotary motor 9, so that the rotating block 20 drives the hot cutting knife to rotate for cutting and heat sealing, and automatic cutting and sealing can be realized;

[0023] One side of the rotating block 20 is fixedly connected with a cutting block 21 through a bolt, and a hot cutting knife is provided on one side of the bottom of the cutting block 21 away from the rotating block 20. It enables the staff to quickly replace the cutting block 21 on the rotating block 20 according to needs, which is convenient for cutting plastic bags with different rounded corners or flat corners;

[0024] An extrusion roller 6 is provided between the support plate 2 at the bottom end of the rotating block 20 away from the conveyor roller 19, and a conveyor belt 5 is provided in the processing table 1 below the extrusion roller 6. An opening is provided at the top of the processing table 1, and a driving mechanism is provided on one side of the processing table 1. The driving mechanism on one side of the processing table 1 is connected to the conveyor belt 5 and the extrusion roller 6. When the driving mechanism is started, the plastic bag can be conveyed on the conveyor belt 5 to facilitate unloading. At the same time, the driving mechanism can drive the extrusion roller 6 to rotate at a constant speed, so that the other end of the plastic bag can be squeezed during cutting to prevent the other end of the plastic bag from warping during cutting and affecting the cutting effect.

[0025] When the embodiment of the present application is in use, the staff first pulls the plastic bag into the device, and then starts the motor 2 15 to drive the gear 1 16 on its shaft to rotate, and the gear 1 16 drives the gear 2 17 meshing with it to rotate, and the gear 1 16 and the gear 2 17 drive the conveying roller 19 on the conveying shaft 18 to rotate in the direction to convey the plastic bag. It can also be pressed during transportation to prevent the plastic bag from wrinkling during cutting, which affects the heat sealing effect of the plastic bag. Then the driving mechanism can be started to convey the plastic bag on the conveyor belt 5. At the same time, the driving mechanism can also drive the extrusion roller 6 to rotate at a uniform speed, which can squeeze the other end of the plastic bag to prevent the other end of the plastic bag from tilting during cutting, which affects the cutting effect. When cutting and heat sealing are required, the control system can be configured By starting the pressing cylinder 3, motor 12, rotating motor 9 and hot cutter together, the pressing cylinder 3 can drive the hot cutter to press down, and at the same time, the transmission block 11 on the screw rod 13 can be driven by motor 12 to move, so that the transmission block 11 drives the connecting plate 8 to move, so that the connecting plate 8 can move stably through the action of the transmission block 11 and the slider 7 on the screw rod 13 and the slide rod 14, and the rotating block 20 connected to the starting rotating motor 9 can be rotated, so that the rotating block 20 drives the hot cutter to rotate, cut and heat seal, which can realize automatic cutting and sealing, and the heat-sealed plastic bag can continue to be conveyed to the next process. When the cutting block 21 needs to be replaced, the cutting block 21 can be removed by loosening the bolt, which is convenient for quickly replacing the cutting block 21 and also convenient for cutting plastic bags with different rounded corners or flat angles.

[0026] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0029] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing mechanism for forming rounded corners of plastic bags, characterized in that: It includes a processing table (1) and a support plate (2). On both sides of the top of the processing table (1), there are support plates (2). On one side where the processing table (1) and the support plate (2) are connected, there is an outer cover (4). On the other side of the outer cover (4), there is a second motor (15). The output end of the second motor (15) extends into the outer cover (4) and is provided with a first gear (16). On the other side inside the outer cover (4), there is a connecting shaft. On the connecting shaft inside the outer cover (4), there is a second gear (17). The second gear (17) meshes with the first gear (16). The connecting shaft inside the outer cover (4) and the output shaft of the second motor (15) both extend to the inside of the processing table (1) and the support plate (2) and are fixedly connected with a transmission shaft (18). On the transmission shaft (18), there are transmission rollers (19).

2. The sealing mechanism for forming rounded corners of a plastic bag according to claim 1, wherein: At the top of the support plate (2) on one side of the processing table (1), there is a first motor (12). The output end of the first motor (12) penetrates through the support plate (2) and is fixedly connected with a lead screw (13). On the lead screw (13), there is a transmission block (11).

3. The sealing mechanism for forming rounded corners of a plastic bag according to claim 1, wherein: Between the other sides inside the support plate (2), there is a slide bar (14) parallel to the lead screw (13). On the slide bar (14), there is a slider (7) corresponding to the transmission block (11). Between the slider (7) and the transmission block (11), there is a connecting plate (8).

4. A sealing mechanism for forming rounded corners of a plastic bag according to claim 3, characterized in that: On the top of the connecting plate (8), there is a pressing cylinder (3). The output end of the pressing cylinder (3) extends to the bottom of the connecting plate (8) and is fixedly connected with a motor cover (10). Inside the motor cover (10), there is a rotating motor (9).

5. The sealing mechanism for forming rounded corners of a plastic bag according to claim 4, characterized in that: The output end of the rotating motor (9) penetrates through the motor cover (10) and is fixedly connected with a rotating shaft. The bottom of the motor cover (10) is fixedly connected with a rotating block (20) through the rotating shaft.

6. The sealing mechanism for forming rounded corners of a plastic bag according to claim 5, wherein: On one side of the rotating block (20), there is a cutting block (21) fixed by bolts. On the side of the bottom of the cutting block (21) away from the rotating block (20), there is a hot cutting knife.

7. A sealing mechanism for forming rounded corners of a plastic bag according to claim 5, characterized in that: Between the support plates (2) at the bottom end on the side of the rotating block (20) away from the transmission roller (19), there is a squeezing roller (6). Inside the processing table (1) below the squeezing roller (6), there is a conveyor belt (5).

8. The sealing mechanism for forming rounded corners of a plastic bag according to claim 1, characterized in that: There is an opening at the top of the processing table (1). On one side of the processing table (1), there is a driving mechanism. The driving mechanism on one side of the processing table (1) is connected to the conveyor belt (5) and the squeezing roller (6).

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