Heat sealing cutter device and heat sealing equipment

Abstract

The present application discloses a heat-sealing cutter device and heat-sealing equipment. The heat-sealing cutter device includes: a back plate having a groove thereon; a heat-sealing cutter mechanism disposed opposite the back plate, with a gap between the back plate and the heat-sealing cutter mechanism; the heat-sealing cutter mechanism includes a cutter seat, a cutter body fixed to the cutter seat, and a heating element for heating the cutter body; the cutter body includes a cutter body main body and a blade connected to the end of the cutter body main body facing the back plate; the side of the cutter body main body facing the back plate is provided with heat-sealing bonding surfaces located on both sides of the cutter body; wherein the cutter body is adapted to press a film passing through the gap toward the back plate; the blade is adapted to drive the film facing the groove into the groove to cut the film; and the heat-sealing bonding surfaces are adapted to bond to the film on both sides of the cut line for heat sealing. When the blade of the cutter body cuts the substrate, the heat-sealing bonding surfaces on the cutter body can heat-seal the substrate on both sides of the cut line, resulting in a neat heat-sealing surface. The heat-sealing pressure can be increased by relying on the reaction force of the substrate on the heat-sealing bonding surfaces.

Description

Technical Field

[0001] The present application relates to the field of heat sealing technology, and in particular to a heat sealing cutter device and heat sealing equipment. Background Art

[0002] Traditional narrow-width cylindrical film production is done on small blown film lines, resulting in low production efficiency and unstable products. Wide-width production lines, while more efficient than small blown film lines, employ a multi-step production process. That is, after film is blown on a wide-width blown film machine, it is slit and heat-sealed offline in separate steps, resulting in low efficiency.

[0003] Later, some manufacturers attempted to perform slitting and heat sealing online. This method often involved heat sealing first and then slitting, but the results were still poor. For example, defects such as loose heat seals and uneven heat-sealing surfaces occurred. The main cause of these defects was insufficient heat sealing pressure, while the uneven heat-sealing surfaces were caused by the distance between the slitting and heat-sealing devices.

[0004] In view of the defects of the prior art, it is necessary to design a new heat sealing cutter device to overcome the above defects.

[0005] Application Contents

[0006] Therefore, the technical problem to be solved by this application is to overcome the defects of the prior art of first heat-sealing the film and then cutting it, such as the lack of firm heat sealing and uneven heat sealing surface, thereby providing a heat sealing cutter device and heat sealing equipment.

[0007] To solve the above technical problems, the technical solutions of this application are as follows:

[0008] A heat sealing cutter device, comprising:

[0009] A back plate, wherein the back plate is provided with a groove;

[0010] A heat-sealing cutter mechanism is disposed opposite the back plate, with a gap between the back plate and the heat-sealing cutter mechanism. The heat-sealing cutter mechanism includes a cutter seat, a cutter body fixed to the cutter seat, and a heating element for heating the cutter body. The cutter body includes a cutter body main body and a blade connected to an end of the cutter body facing the back plate. The side of the cutter body main body facing the back plate is provided with heat-sealing contact surfaces located on both sides of the blade.

[0011] The blade is adapted to press the film passing through the gap toward the back plate, the blade is adapted to drive the film facing the groove into the groove to cut the film, and the heat-sealing surface is adapted to adhere to the film on both sides of the cutting line for heat sealing.

[0012] Furthermore, the blade is arc-shaped, and the center of the arc is located on the side where the blade seat is located.

[0013] Furthermore, a fixing groove is provided on the knife seat, and the knife body is fixed in the fixing groove. The heating element includes a heating plate arranged in the fixing groove and attached to both sides of the knife body. A pressing structure for pressing the heating plate onto the knife body is provided on the side wall of the fixing groove.

[0014] Furthermore, the clamping structure includes a pressure plate arranged in the fixed groove and located on one side of the heating plate, an adjusting pressure member movably connected to the side wall of the fixed groove and with one end abutting against the pressure plate, and an insulation plate is also provided between the pressure plate and the heating plate.

[0015] Furthermore, the heating element also includes a heating tube arranged in the inner cavity of the blade body.

[0016] Furthermore, a thermocouple is provided in the inner cavity of the blade body, and the thermocouple is suitable for detecting the temperature of the blade body.

[0017] Furthermore, the knife holder is connected to one end of a swing arm, and the other end of the swing arm is connected to a guide rod. The guide rod is driven by a driving device to rotate to drive the swing arm to swing around the axial direction of the guide rod. The knife holder and the blade thereon approach or move away from the back plate as the swing arm swings.

[0018] Furthermore, the swing arm is provided with an adjustment mechanism for adjusting the distance between the knife seat and the swing arm.

[0019] Furthermore, the back plate is arc-shaped and protrudes toward the blade body, and the groove is an arc-shaped groove that passes through the back plate.

[0020] The technical solution of this application has the following advantages:

[0021] 1. The heat-sealing cutter device provided in this application has a blade that, when moving toward the side of the back plate, presses against the substrate on the back plate and enters the groove until the heat-sealing surface at the end of the blade body contacts the substrate. The blade then cuts the substrate. Under the action of surface tension, the substrate on both sides of the cut line exerts a reaction force on the heat-sealing surface, causing the substrate to adhere to the heat-sealing surface, thereby increasing the heat-sealing pressure, improving the heat-sealing firmness, and the neatness of the heat-sealing surface. The blade of the blade body can cut the substrate, and the heat-sealing surfaces on both sides of the blade can simultaneously heat-seal the substrate on both sides of the cut line. Cutting and heat-sealing are completed simultaneously, without having to be performed in separate steps, which can improve the efficiency of cutting and heat sealing.

[0022] 2. The heat sealing cutter device provided in this application has an arc-shaped groove penetrating the back plate, so that after the substrate is cut, the main body of the cutter can continue to advance in the direction of the arc-shaped groove. Relying on the tension of the substrate on the heat sealing bonding surface, the substrate and the heat sealing bonding surface are more tightly bonded, further increasing the heat sealing pressure.

[0023] 3. The heat sealing cutter device provided in the present application has a heating tube provided in the inner cavity of the cutter body, so that the heat sealing bonding surface can be quickly heated to meet the needs of high-speed movement of the substrate.

[0024] 4. The heat sealing cutter device provided in this application has a reasonable heat sealing cutter mechanism layout, convenient adjustment, and stable temperature control.

[0025] A heat sealing device comprises a frame, a guide roller arranged on the frame for guiding a substrate to run, and the above-mentioned heat sealing cutter device arranged on the frame for cutting and heat-sealing the substrate.

[0026] The technical solution of this application has the following advantages:

[0027] The heat sealing device provided by the present application has all the advantages of the aforementioned heat sealing cutter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a schematic structural diagram of the heat sealing equipment of this application;

[0030] Figure 2 A schematic diagram of the heat sealing cutter device of the present application;

[0031] Figure 3 A front view of the back plate and heat-sealing cutter mechanism in this application;

[0032] Figure 4 A three-dimensional schematic diagram of the back plate and heat-sealing cutter mechanism in this application;

[0033] Figure 5 A top view schematic diagram of the back plate and heat-sealing cutter mechanism interacting with the film in the application;

[0034] Figure 6 A side view schematic diagram of the back plate and heat-sealing cutter mechanism interacting with the film in the application;

[0035] Figure 7A front view of the heat-sealing cutter mechanism in this application;

[0036] Figure 8 A three-dimensional schematic diagram of the heat sealing cutter mechanism in this application;

[0037] Figure 9 A side view of the heat sealing cutter mechanism in this application;

[0038] Figure 10 A three-dimensional schematic diagram of the back plate in this application;

[0039] Figure 11 This is a three-dimensional schematic diagram of the back plate in this application from another angle.

[0040] Description of reference numerals:

[0041] a. Film; 1. First guide roller; 2. Second guide roller; 3. Back plate; 31. Groove; 32. First fastening handle; 33. Support plate; 4. Heat sealing cutter mechanism; 41. Knife holder; 42. Knife body; 421. Knife body; 422. Blade; 423. Heat sealing bonding surface; 424. Heating tube; 43. Heating plate; 44. Heat insulation plate; 45. Pressing mechanism; 451. Pressing plate; 452. Adjusting pressing member; 46. Swing arm; 47. Hand wheel; 48. Second fastening handle; 49. Fine-tuning screw; 5. First cold roller; 6. Rubber pressing roller; 7. Second cold roller; 8. Sliding rod; 9. Guide rod. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0043] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0046] Example

[0047] like Figure 1 As shown, this embodiment provides a heat-sealing device for cutting and heat-sealing a substrate. In this embodiment, the substrate is a cylindrical film a. The heat-sealing device includes a frame, guide rollers mounted on the frame for guiding the substrate, and a heat-sealing cutter device mounted on the frame for slitting and heat-sealing the film a. Specifically, the guide rollers include a first guide roller 1 and a second guide roller 2, which are arranged in sequence in the direction of the substrate's advance and rotate in the same direction. Of course, to cool and extrude the heat-sealed film a, a first cold roller 5 and a second cold roller 7 are provided, which rotate in the same direction as the first guide roller 1 and the second guide roller 2, as well as a rubber pressing roller 6, which is arranged in conjunction with the first cold roller 5 and rotates in the opposite direction of the first cold roller 5. The first cold roller 5 and the rubber pressing roller 6 cooperate to extrude the heat-sealed film a.

[0048] like Figures 2 to 11 As shown, the heat-sealing cutter device is used to cut a wide substrate and heat-seal it to form a narrow substrate. The heat-sealing cutter device includes a back plate 3 and a heat-sealing cutter mechanism 4.

[0049] The upper and lower ends of the support plate 33 of the back panel 3 are mounted on two guide rods 9, respectively, via two bearings (not shown). The back panel 3 can be moved along the guide rods 9, facilitating its movement to a desired position. Once the back panel 3 reaches its desired position, the first fastening handle 32 locks the back panel 3 to prevent its movement. The back panel 3 is curved and protrudes toward the heat-seal cutter mechanism 4. This allows the film a to rest against the back panel 3 during its movement, providing support and guidance. The back panel 3 is provided with grooves 31, which are arc-shaped grooves that extend through the back panel 3. In this embodiment, there are five arc-shaped grooves on the back panel 3, arranged in a row and spaced apart. This allows the blade 42 of the heat-seal cutter mechanism 4 to select the appropriate groove 31 for engagement. Alternatively, the number of grooves 31 may be one, two, three, or four. The specific number of grooves 31 on the back panel 3 is determined based on practical needs and is not specifically limited herein.

[0050] The heat sealing cutter mechanism 4 is arranged opposite to the back plate 3, and there is a gap between the heat sealing cutter mechanism 4 and the back plate 3, and the film a moves forward in the gap along the curved back plate 3. The heat sealing cutter mechanism 4 is used to cut the film a and heat seal the film a on both sides of the cutting line.

[0051] The heat-sealing cutter mechanism 4 includes a cutter seat 41 , a cutter body 42 fixed on the cutter seat 41 , and a heating element for heating the cutter body 42 .

[0052] The blade 42 is suitable for pressing the film a passing through the gap toward the back plate 3 . The blade 42 includes a blade body 421 and a blade 422 connected to one end of the blade body 421 facing the back plate 3 .

[0053] The blade 422 is arc-shaped, and the center of the arc is located on the side where the blade seat 41 is located, so that the blade 422 protrudes into the groove 31 of the back plate 3. The arc of the blade 422 matches the size of the arc groove, which makes it convenient for the blade 422 to bring the film a facing the groove 31 into the arc groove to cut off the film a.

[0054] The blade body 421 has heat-sealing surfaces 423 on both sides of the blade 422 on one side thereof facing the back plate 3. The heat-sealing surfaces 423 are flat and suitable for being attached to the film a on both sides of the cutting line to heat-seal the film a and obtain a flat heat-sealing surface.

[0055] The blade body 421 is fixed in a fixing groove (not marked) of the blade holder 41, and the heating element includes a heating plate 43 disposed in the fixing groove and attached to both sides of the blade body 421. A pressing structure for pressing the heating plate 43 against the blade body 421 is provided on the side wall of the fixing groove. In this embodiment, there are two pressing structures, which are respectively provided on two opposite side walls of the fixing groove. Each pressing mechanism 45 includes a pressing plate 451 disposed in the fixing groove and located on one side of the heating plate 43, an adjusting pressing member 452 movably connected to the side wall of the fixing groove and with one end abutting against the pressing plate 451, and a heat insulating plate 44 is also provided between the pressing plate 451 and the heating plate 43 to prevent the high temperature of the heating plate 43 from damaging the pressing plate 451. Specifically, the adjusting clamping piece 452 is a clamping screw. When in use, tighten the clamping screw so that it abuts against the pressure plate 451. The pressure plate 451 moves toward the heat insulation plate 44, driving the heat insulation plate 44 to move toward the heating plate 43, and finally making the heating plate 43 close to the blade body 421, so as to increase the fit between the heating plate 43 and the blade body 421, and improve the heat transfer efficiency of the heating plate 43 to the blade body 421.

[0056] However, in this embodiment, Figure 7From the perspective, since there is a certain distance between the heat-sealing bonding surface 423 on the blade body 421 and the end of the heating plate 43, in order to quickly increase the temperature of the heat-sealing bonding surface 423 to the target temperature in a short time to adapt to the rapid advancement of the film a, a heating tube 424 is provided in the inner cavity of the blade body 421. The end of the heating tube 424 extends beyond the end of the heating plate 43 so as to be closer to the heat-sealing bonding surface 423. The heating tube 424 can quickly heat the heat-sealing bonding surface 423 to the target temperature.

[0057] In addition, a thermocouple is provided in the inner cavity of the blade body 421 . The thermocouple is suitable for detecting the temperature of the blade body 421 to prevent the temperature of the blade body 421 from being too high or too low, thereby affecting the heat sealing effect.

[0058] like Figure 4 and Figure 8 As shown, the knife holder 41 of the heat sealing cutter mechanism 4 is connected to one end of a swing arm 46, and the other end of the swing arm 46 is connected to a slide rod 8. The knife holder 41 can move along the slide rod 8. After the heat sealing cutter mechanism 4 moves to the target position, the second fastening handle 48 is locked to prevent the heat sealing cutter mechanism 4 from moving. When it is necessary to fine-tune the position of the heat-sealing cutter mechanism 4 relative to the groove 31 on the back plate 3, it is only necessary to adjust the adjustment mechanism on the swing arm 46. In this embodiment, the adjustment mechanism is a handwheel 47. Specifically, by turning the handwheel 47, the fine-tuning screw 49 cooperates with the internal thread on the inner side of the handwheel 47, so that the fine-tuning screw 49 moves relative to the handwheel 47, driving the knife holder 41 fixed to the fine-tuning screw 49 to move, thereby changing the distance between the knife holder 41 and the swing arm 46, and realizing fine-tuning of the heat-sealing cutter mechanism 4 relative to the groove 31, so that the blade 422 is directly opposite the groove 31, avoiding different gaps between the two sides of the blade 422 and the two side walls of the groove 31, resulting in different widths of the film a being heat-sealed and the heat-sealing bonding surface 423 on both sides of the cutting line, affecting the heat-sealing effect. After the knife holder 41 is fixed on the slide rod 8, when heat sealing cutting is required, the slide rod 8 is driven by a driving mechanism to rotate to drive the swing arm 46 to swing around the axial direction of the slide rod 8, and the knife holder 41 and the blade 422 thereon move closer to or away from the back plate 3 as the swing arm 46 swings.

[0059] The following describes the working process of the heat sealing cutter device in the heat sealing equipment of this embodiment:

[0060] Make the first guide roller 1, the second guide roller 2, the first cold roller 5, the rubber pressing roller 6, and the second cold roller 7 rotate;

[0061] exist Figure 1From a viewing angle, film a arrives at the first guide roller 1 from an obliquely downward direction. Guided by the first guide roller 1, the film a's forward direction changes to a horizontal direction. After arriving at the second guide roller 2, the film a's forward direction changes to a vertically downward direction. At this time, the film a's forward direction is parallel to the plane of the blade body 421. The film a continues to move forward and reaches the back plate 3, and is tangent to the back plate 3. The back plate 3 provides support for the film a and stabilizes the film a.

[0062] The film a passes through the gap between the back plate 3 and the knife body 42, and the knife seat 41 of the heat-sealing cutter rotates around the slide rod 8 under the drive of the swing arm 46 to approach the back plate 3 until the blade 422 abuts against the film a, and the blade 422 further moves toward the groove 31, and the heat-sealing bonding surface 423 continues to approach the film a until the heat-sealing bonding surface 423 contacts the film a and the blade 422 cuts the film a. Since the knife body 421 has been heated by the heating plate 43, the heating tube 424 in the knife body 421 can also quickly heat the heat-sealing bonding surface 423, ensuring the heat-sealing temperature, so that the film a on both sides of the cutting line is quickly heat-sealed on the heat-sealing bonding surface 423; in addition, since the arc groove penetrates the back plate 3, it can provide more propulsion space for the knife body 421. Sufficient heat-sealing pressure is provided. After the film a is cut, the blade body 421 will continue to advance toward the groove 31 driven by the swing arm 46. This, on the one hand, increases the heat-sealing time. On the other hand, due to the elasticity of the film a, relying on its surface tension, the film a will generate a reaction force on the heat-sealing contact surface 423, so that the film a on both sides of the cut line is tightly attached to the heat-sealing contact surface 423, thereby increasing the heat-sealing pressure. Taken together, the heat-sealing temperature, pressure, and dwell time of the heat-sealing cutter device in this embodiment can meet the heat-sealing requirements. Furthermore, because the advancing direction of the film a is parallel to the plane of the blade body 421 in the gap between the back plate 3 and the heat-sealing cutter mechanism 4, the film a can be cut and heat-sealed continuously and continuously, thereby realizing continuous operation.

[0063] The cut film a continues to move forward, and one side of the film a is cooled by the first cold roller 5. At the same time, the rubber pressing roller 6 with a cylinder cooperates with the first cooling roller to squeeze the heat-sealed film a. The squeezed film a reaches the second cold roller 7, and the second cold roller 7 cools the other side of the film a, finally completing the entire heat sealing process.

[0064] From the above description of the working process, it can be seen that the heat sealing cutter device and heat sealing equipment provided in this embodiment can realize continuous cutting and heat sealing of film a, and the cutting and heat sealing are completed together without step-by-step execution, which can improve the cutting and heat sealing efficiency.

[0065] In this embodiment, the blade 422 of the heat-sealing cutter mechanism 4 drives the film a facing the groove 31 into the groove 31 until the heat-sealing surface 423 contacts the film a and cuts the film a. Under the action of surface tension, the film a on both sides of the cutting line exerts a reaction force on the heat-sealing surface 423, causing the film a to stick to the heat-sealing surface 423, thereby increasing the heat-sealing pressure, improving the heat-sealing firmness and the neatness of the heat-sealing surface.

[0066] Of course, in order to further increase the heat sealing pressure, after cutting the film a, the blade body 421 continues to advance toward the groove 31, relying on the tension of the film a on the heat sealing surface 423, so that the film a and the heat sealing surface 423 fit more tightly, further increasing the heat sealing pressure.

[0067] The heat sealing cutter device provided in this embodiment has a reasonable heat sealing cutter mechanism layout, convenient adjustment, and stable temperature control.

[0068] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this application.

Claims

1. A heat sealing cutter device, characterized in that: include: A back plate (3), wherein the back plate (3) is provided with a groove (31); A heat-sealing cutter mechanism (4) is arranged opposite to the back plate (3), with a gap between the back plate (3) and the heat-sealing cutter mechanism (4). The heat-sealing cutter mechanism (4) comprises a cutter seat (41), a cutter body (42) fixed on the cutter seat (41), and a heating element for heating the cutter body (42); the cutter body (42) comprises a cutter body main body (421), and a blade (422) connected to one end of the cutter body main body (421) facing the back plate (3); a heat-sealing contact surface (423) located on both sides of the blade (422) is provided on the side of the cutter body main body (421) facing the back plate (3); a cutter seat (41) is provided with a heat-sealing contact surface (423) located on both sides of the blade (422); a cutter seat (41) is provided with a heat-sealing contact surface (423) located on There is a fixing groove, the blade body (421) is fixed in the fixing groove, the heating element includes a heating plate (43) arranged in the fixing groove and attached to both sides of the blade body (421), and a pressing structure for pressing the heating plate (43) onto the blade body (421) is provided on the side wall of the fixing groove; the pressing structure includes a pressing plate (451) arranged in the fixing groove and located on one side of the heating plate (43), and an adjusting pressing member (452) movably connected to the side wall of the fixing groove and with one end abutting against the pressing plate (451); and a heat insulation plate (44) is also provided between the pressing plate (451) and the heating plate (43); The blade (42) is suitable for pressing the substrate passing through the gap toward the back plate (3), the blade (422) is suitable for driving the substrate facing the groove (31) into the groove (31) to cut the substrate, and the heat-sealing surface (423) is suitable for attaching to the substrate on both sides of the cutting line to perform heat sealing.

2. The heat sealing cutter device according to claim 1, characterized in that: The blade (422) is arc-shaped, and the center of the arc is located on the side where the blade seat (41) is located.

3. The heat sealing cutter device according to claim 1, characterized in that: The heating element further comprises a heating tube (424) arranged in the inner cavity of the blade body (421).

4. The heat sealing cutter device according to claim 1, characterized in that: The inner cavity of the blade body (421) is provided with a thermocouple, and the thermocouple is suitable for detecting the temperature of the blade body (421).

5. The heat sealing cutter device according to claim 1, characterized in that: The knife seat (41) is connected to one end of a swing arm (46), and the other end of the swing arm (46) is connected to a slide bar (8). The slide bar (8) is driven by a driving device to rotate to drive the swing arm (46) to swing around the axial direction of the slide bar (8). The knife seat (41) and the blade (422) thereon move closer to or away from the back plate (3) as the swing arm (46) swings.

6. The heat sealing cutter device according to claim 5, characterized in that: The swing arm (46) is provided with an adjustment mechanism for adjusting the distance between the knife seat (41) and the swing arm (46).

7. The heat sealing cutter device according to claim 1, characterized in that: The groove (31) is an arc-shaped groove, the arc-shaped groove passes through the back plate (3), and the arc-shaped groove protrudes toward the blade body (42).

8. A heat sealing device, characterized in that: The heat sealing cutter device comprises a frame, a guide roller arranged on the frame for guiding the substrate to run, and a heat sealing cutter device as described in any one of claims 1 to 7 arranged on the frame for cutting and heat sealing the substrate.

Images