Sealing device for sterile liquid food packaging bag

Abstract

The utility model provides a sealing device for a sterile liquid food packaging bag, which comprises a sealing rack, and a belt conveyor for conveying the sterile liquid food packaging bag is mounted on the top side of the sealing rack; the placing shell is fixedly mounted on the surface of a conveying belt of the belt conveyor; the adjustable conveying assembly is installed on the surface of the top side of the sealing rack, and the adjustable conveying assembly is used for adjusting the position of the second conveyor; the first conveyor is positioned on the bottom side of the second conveyor; the auxiliary feeding assembly is fixedly mounted on the surface of the right side of the sealing rack; and the adjustable hot pressing assembly is mounted on the surface of the front side of the sealing rack. The sealing effect of the end opening of the sterile liquid food packaging bag is improved, the appearance and quality of the sealing opening of the sterile liquid food packaging bag are improved, and products in the packaging bag are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing device, especially a sealing device for aseptic liquid food packaging bag. BACKGROUND

[0002] The aseptic liquid food packaging bag is a material specially used for packaging aseptic liquid food, which can effectively prevent the liquid food from being polluted by external factors such as microorganisms, oxygen and moisture during packaging, storage and transportation, thereby prolonging the shelf life of the food and maintaining the flavor of the food. The aseptic liquid food packaging bag is widely used for packaging liquid foods such as fruit juice, milk and soy sauce. The aseptic liquid food packaging bag is usually composed of multiple layers of materials, including plastic, aluminum foil and metal evaporation film.

[0003] During the sealing process of the packaging bag, the thickness of the port of different packaging bags may be different, which may affect the heat pressing or incomplete sealing of the packaging bag, thereby affecting the appearance and quality of the packaging bag and possibly causing adverse effects on the products in the packaging. UTILITY MODEL CONTENT

[0004] The utility model discloses a sealing device for aseptic liquid food packaging bag to solve the technical problem that the thickness of the port of different packaging bags may be different during the sealing process of the packaging bag, which may affect the heat pressing or incomplete sealing of the packaging bag, thereby affecting the appearance and quality of the packaging bag and possibly causing adverse effects on the products in the packaging.

[0005] The utility model discloses a sealing device for aseptic liquid food packaging bag to solve the technical problem that the thickness of the port of different packaging bags may be different during the sealing process of the packaging bag, which may affect the heat pressing or incomplete sealing of the packaging bag, thereby affecting the appearance and quality of the packaging bag and possibly causing adverse effects on the products in the packaging.

[0006] The utility model provides a sealing device for aseptic liquid food packaging bag, the sealing device for aseptic liquid food packaging bag includes:

[0007] The sealing frame is provided with a belt conveyor for conveying aseptic liquid food packaging bags on the top side.

[0008] The placing shell is fixedly installed on the surface of the conveying belt of the belt conveyor.

[0009] The adjustable conveying assembly is installed on the top side surface of the sealing frame, and is used for adjusting the position of the second conveyor.

[0010] The first conveyor is located on the bottom side of the second conveyor, and cooperates with the second conveyor to clamp and convey the port of the aseptic liquid food packaging bag.

[0011] The auxiliary feeding assembly is fixedly installed on the right surface of the sealing frame, and is used for auxiliary feeding of the sterile liquid food packaging bag.

[0012] The adjustable hot pressing assembly is installed on the front surface of the sealing frame, and is used for hot pressing sealing of the port of the sterile liquid food packaging bag.

[0013] Further, the sealing frame comprises a base, a support, a casing and a control panel, the support is fixedly installed on the bottom surface of the base at four corners, the casing is fixedly installed on the top of the rear side of the base, and the control panel is fixedly installed on the top side of the casing.

[0014] Further, the number of the placing shells is several, and the several adjacent placing shells are equidistantly distributed on the surface of the conveying belt of the belt conveyor.

[0015] Further, the inner wall of the top side of the conveying belt of the first conveyor is provided with a support plate, and the support plate is fixedly installed on the inner wall surface of the casing.

[0016] Further, the auxiliary feeding assembly comprises a fixing seat, a fixing bolt and an auxiliary plate, the fixing seat is vertically fixedly installed on the right inner surface of the casing, the fixing seat is fixedly connected with the casing through the fixing bolt, and the auxiliary plate is fixedly connected with the top surface of the fixing seat.

[0017] The end of the fixing bolt on the surface of the fixing seat is threadedly connected with the side surface of the casing, and the top side of the auxiliary plate fixedly connected with the top side of the surface of the conveying belt of the first conveyor is in the same horizontal plane.

[0018] Further, the adjustable conveying assembly comprises a servo motor, a first gear, a second gear, a threaded column, a threaded sleeve and a mounting bracket, the servo motor is fixedly installed on the inner wall of the top side of the casing, the output end of the servo motor is connected with the first gear, one side of the first gear is engagedly connected with the second gear, the second gear is fixedly connected with the threaded sleeve in the inner cavity, the threaded sleeve is threadedly connected with the threaded column in the inner cavity, and the bottom end of the threaded column is fixedly connected with the mounting bracket.

[0019] Further, the second gear is provided with a limiting ring sleeved on the surface of the threaded column on the top side, the top end of the threaded column is fixedly connected with a limiting seat, the side surface of the limiting ring is fixedly connected with the top side of the casing through the fixing bracket, and the bottom end of the threaded sleeve is provided with a rotating ring sleeved on the surface of the threaded column.

[0020] Further, the top side surface of the mounting bracket is fixedly connected with guide columns in pairs, the top end of the guide column penetrates through the inner cavity of the guide cylinder, and the guide cylinder is fixedly installed on the inner wall of the casing.

[0021] Further, the adjustable hot pressing assembly comprises an adjusting plate, a guide frame, a fastening bolt, a fixing frame, a rotating roller, an electric heating ring, a heat conducting cylinder and an electric heating plate, the guide frame is fixedly installed on the front side surface of the top end of the shell, the adjusting plate penetrates through the inner cavity of the guide frame, the fastening bolt is threadedly connected to the surface of the guide frame, the fixing frame is fixedly connected to the bottom end of the adjusting plate, the rotating roller is rotatably connected to the inner wall of the fixing frame, the electric heating ring is sleeved and installed on the surface of the rotating roller, the heat conducting cylinder is sleeved on the outer side surface of the electric heating ring, and the electric heating plate is arranged on the bottom side of the heat conducting cylinder.

[0022] Further, a plurality of rotating rollers are fixedly installed on the inner wall of the fixing frame and are equidistantly distributed between adjacent rotating rollers, the electric heating plate is arranged on the bottom side of the rotating roller, the electric heating plate is fixedly installed on the front side surface of the support plate, and the top side surface of the electric heating plate is in the same horizontal plane as the top side surface of the conveying belt of the first conveyor.

[0023] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, each preferred example of the utility model is obtained.

[0024] The positive progress effect of the utility model lies in:

[0025] The sealing device for the sterile liquid food packaging bag is convenient to adjust the movement of the second conveyor according to the thickness of the port of the sterile liquid food packaging bag under the action of the adjustable conveying assembly, convenient to move the sterile liquid food packaging bag by the subsequent clamping of the first conveyor and the second conveyor, move the placing shell on the top side by the automatic driving of the conveying belt of the belt conveyor, move the sterile liquid food packaging bag placed in the placing shell, workers bend the port of the sterile liquid food packaging bag, and the port of the sterile liquid food packaging bag is attached to the auxiliary feeding assembly, so that the port of the sterile liquid food packaging bag is put into the first conveyor and the second conveyor for clamping and conveying, and when conveyed to the adjustable hot pressing assembly, the port of the sterile liquid food packaging bag is conveniently sealed by hot pressing under the action of the adjustable hot pressing assembly, the sealing effect of the port of the sterile liquid food packaging bag is effectively improved, the appearance and quality of the sealed port of the sterile liquid food packaging bag are improved, and the product in the package is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application.

[0027] Figure 1 It is a perspective structural schematic view of the sealing device.

[0028] Figure 2 It is a front structural schematic view of the sealing device.

[0029] Figure 3 It is the left side three-dimensional structure schematic view of the sealing device.

[0030] Figure 4 It is the right side three-dimensional structure schematic view of the sealing device.

[0031] Figure 5 It is the bottom view three-dimensional structure schematic view of the sealing device.

[0032] Figure 6 It is the whole of the sealing device Figure 1 It is the local enlarged structure schematic view of A place.

[0033] Figure 7 It is the whole of the sealing device

[0034] Figure 8 It is the left side view structure schematic view of the sealing device.

[0035] Explanation of reference signs

[0036] 1, sealing frame; 11, base; 12, support; 13, casing; 14, control panel; 2, belt conveyor; 3, first conveyor; 4, support plate; 5, placing shell; 6, auxiliary feeding assembly; 61, fixed seat; 62, fixed bolt; 63, auxiliary plate; 7, adjustable conveying assembly; 71, servo motor; 72, first gear; 73, second gear; 74, threaded column; 75, limiting seat; 76, fixed frame; 77, limiting ring; 78, guide column; 79, guide cylinder; 710, mounting frame; 711, threaded sleeve; 8, adjustable hot pressing assembly; 81, adjusting plate; 82, guide frame; 83, fastening bolt; 84, fixed frame; 85, rotating roller; 86, electric heating ring; 87, heat conduction cylinder; 88, electric heating plate. DETAILED DESCRIPTION

[0037] In order to make the person skilled in the art better understand the present application, the technical scheme in the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be combined. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0041] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0043] As shown in Figures 1-8 The sealing device for aseptic liquid food packaging bag comprises:

[0044] A sealing frame 1 is provided with a belt conveyor 2 for conveying aseptic liquid food packaging bags on the top side;

[0045] A placing shell 5 is fixedly installed on the conveying belt surface of the belt conveyor 2;

[0046] Adjustable conveying assembly 7, installed on the top side surface of the sealing frame 1, used for the adjustment of the second conveyor position;

[0047] The first conveyor 3 is located on the bottom side of the second conveyor, which cooperates with the second conveyor for sterile liquid food packaging bag port clamping conveying;

[0048] Auxiliary feeding assembly 6, fixedly installed on the right side surface of the sealing frame 1, used for the auxiliary feeding of the sterile liquid food packaging bag;

[0049] Adjustable hot pressing assembly 8, installed on the front side surface of the sealing frame 1, used for the hot pressing sealing of the sterile liquid food packaging bag port.

[0050] Through the action of the adjustable conveying assembly 7, the second conveyor can be adjusted according to the thickness of the sterile liquid food packaging bag port, and the first conveyor 3 and the second conveyor can be subsequently clamped to drive the sterile liquid food packaging bag to move. The belt conveyor 2 automatically drives the conveyor belt to move the top side placement shell 5, and the placement shell 5 moves the sterile liquid food packaging bag placed inside. The worker bends the sterile liquid food packaging bag port and attaches it to the auxiliary feeding assembly 6, which facilitates the sterile liquid food packaging bag port to be placed between the first conveyor 3 and the second conveyor for clamping conveying. When conveyed to the adjustable hot pressing assembly 8, the adjustable hot pressing assembly 8 facilitates the hot pressing sealing operation of the sterile liquid food packaging bag port, effectively improves the sealing effect of the sterile liquid food packaging bag port, improves the appearance and quality of the sterile liquid food packaging bag sealing, and protects the products in the package.

[0051] The sealing frame 1 includes a base 11, a support 12, a shell 13, and a control panel 14. The support 12 is fixedly installed on the bottom side surface of the base 11 at four corners. The shell 13 is fixedly installed on the top of the rear side of the base 11. The control panel 14 is fixedly installed on the top side of the shell 13. The setting of the support 12 facilitates the stable support of the base 11 by the support 12. The setting of the control panel 14 facilitates the subsequent control of electrical components.

[0052] The number of placement shells 5 is several, and several adjacent placement shells 5 are equally distributed on the surface of the conveyor belt of the belt conveyor 2.

[0053] The inner wall of the top side of the conveyor belt of the first conveyor 3 is provided with a support plate 4, which is fixedly installed on the inner wall surface of the shell 13.

[0054] The auxiliary feeding assembly 6 comprises a fixed seat 61, a fixed bolt 62 and an auxiliary plate 63, the fixed seat 61 is vertically fixedly installed on the inner surface of the right side of the shell 13, the fixed seat 61 is fixedly connected with the shell 13 through the fixed bolt 62, and the top side surface of the fixed seat 61 is fixedly connected with the auxiliary plate 63.

[0055] The end of the fixed bolt 62 on the surface of the fixed seat 61 is threadedly connected with the side surface of the shell 13, and the top side of the auxiliary plate 63 fixedly connected with the top side of the fixed seat 61 is in the same horizontal plane as the top side surface of the conveying belt of the first conveyor 3.

[0056] The adjustable agent conveying assembly comprises a servo motor 71, a first gear 72, a second gear 73, a threaded column 74, a threaded sleeve 711 and a mounting frame 710, the servo motor 71 is fixedly installed on the inner wall of the top side of the shell 13, the output end of the servo motor 71 is connected with the first gear 72, one side of the first gear 72 is meshedly connected with the second gear 73, the inner cavity of the second gear 73 is fixedly connected with the threaded sleeve 711, the inner cavity of the threaded sleeve 711 is threadedly connected with the threaded column 74, and the bottom end of the threaded column 74 is fixedly connected with the mounting frame 710.

[0057] The top side of the second gear 73 is provided with a limiting ring 77 sleeved on the surface of the threaded column 74, the top end of the threaded column 74 is fixedly connected with a limiting seat 75, the side surface of the limiting ring 77 is fixedly connected with the top side of the shell 13 through a fixing frame 76, and the bottom end of the threaded sleeve 711 is provided with a rotating ring sleeved on the surface of the threaded column 74.

[0058] The top side surface of the mounting frame 710 is fixedly connected with guide columns 78 in symmetry, the top end of the guide column 78 penetrates through the inner cavity of a guide cylinder 79, and the guide cylinder 79 is fixedly installed on the inner wall of the shell 13.

[0059] In use, according to the thickness size of the port of the sterile liquid food packaging bag, the servo motor 71 is started, the servo motor 71 drives the first gear 72 to rotate, the first gear 72 drives the second gear 73 meshedly connected with the side surface to rotate, the second gear 73 drives the threaded sleeve 711 fixedly connected with the inner wall to rotate, the threaded sleeve 711 drives the threaded column 74 sleeved in the inner cavity to rotate, the threaded column 74 further adjusts the mounting frame 710 at the bottom to move, moves along the guide cylinder 79 through the guide column 78, is convenient for guiding adjustment, moves the second conveyor fixedly connected through the mounting frame 710, is convenient for adjusting the distance between the conveying belt surface of the second conveyor and the conveying belt surface of the first conveyor 3, is convenient for stably clamping and conveying the port of the sterile liquid food packaging bag, and the supporting plate 4 arranged at the same time is convenient for the stable movement of the sterile liquid food packaging bag.

[0060] The adjustable hot pressing assembly 8 includes an adjusting plate 81, a guide frame 82, a fastening bolt 83, a fixed frame 84, a rotating roller 85, an electric heating ring 86, a heat conducting cylinder 87 and an electric heating plate 88, the guide frame 82 is fixedly installed on the front side surface of the top end of the shell 13, the adjusting plate 81 penetrates through the inner cavity of the guide frame 82, the fastening bolt 83 is threadedly connected to the surface of the guide frame 82, the fixed frame 84 is fixedly connected to the bottom end of the adjusting plate 81, the rotating roller 85 is rotatably connected to the inner wall of the fixed frame 84, the electric heating ring 86 is sleeved and installed on the surface of the rotating roller 85, the heat conducting cylinder 87 is sleeved on the outer side surface of the electric heating ring 86, and the electric heating plate 88 is arranged at the bottom side of the heat conducting cylinder 87.

[0061] A plurality of rotating rollers 85 are fixedly installed on the inner wall of the fixed frame 84, are equidistantly distributed between adjacent rotating rollers 85, the electric heating plate 88 is arranged at the bottom side of the rotating roller 85, the electric heating plate 88 is fixedly installed on the front side surface of the supporting plate 4, and the top side surface of the electric heating plate 88 is in the same horizontal plane as the top side surface of the conveying belt of the first conveyor 3.

[0062] The fixed frame 84 is moved by the adjusting plate 81, the adjusting plate 81 moves along the inner cavity of the guide frame 82, the position of the fixed frame 84 is adjusted by the adjusting plate 81, the distance between the electric heating ring 86 on the adjusting surface of the fixed frame 84 and the electric heating plate 88 at the bottom is adjusted, and then the thickness of the port of the sterile liquid food packaging bag is adjusted, so that the hot pressing operation on the port of the sterile liquid food packaging bag is facilitated in the cooperation between the heat conducting cylinder 87 and the electric heating plate 88, the hot pressing quality of the port of the sterile liquid food packaging bag is improved, and the product quality in the sterile liquid food packaging is guaranteed.

[0063] The circuit and electronic components and modules are all prior art, and those skilled in the art can realize them without further description, and the content protected by the application does not involve improvement of software and methods.

[0064] The utility model is not limited to the above-mentioned embodiment, no matter make any change in its shape or structure, all fall in the protection scope of the utility model, the protection scope of the utility model is defined by the appended claims, those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall into the protection scope of the utility model.

Claims

1. A closure device for aseptic liquid food packaging bags, characterized in that The sealing device for aseptic liquid food packaging bag comprises: A sealing frame (1) is provided with a belt conveyor (2) for conveying aseptic liquid food packaging bags on the top side; A placing shell (5) is fixedly installed on the conveying belt surface of the belt conveyor (2); An adjustable conveying assembly (7) is installed on the top side surface of the sealing frame (1), and is used for adjusting the position of the second conveyor; A first conveyor (3) is located on the bottom side of the second conveyor, and cooperates with the second conveyor to convey and clamp the port of the aseptic liquid food packaging bag; An auxiliary feeding assembly (6) is fixedly installed on the right side surface of the sealing frame (1), and is used for auxiliary feeding of the aseptic liquid food packaging bag; An adjustable hot pressing assembly (8) is installed on the front side surface of the sealing frame (1), and is used for hot pressing and sealing the port of the aseptic liquid food packaging bag.

2. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The sealing frame (1) comprises a base (11), a support (12), a machine shell (13), and a control panel (14), the support (12) is fixedly installed on the bottom side surface of the base (11) at four corners, the machine shell (13) is fixedly installed on the top of the rear side of the base (11), and the control panel (14) is fixedly installed on the top side of the machine shell (13).

3. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The number of the placing shells (5) is several, and the several adjacent placing shells (5) are equidistantly distributed on the conveying belt surface of the belt conveyor (2).

4. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The inner wall of the top side of the conveying belt of the first conveyor (3) is provided with a support plate (4), and the support plate (4) is fixedly installed on the inner wall surface of the machine shell (13).

5. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The auxiliary feeding assembly (6) comprises a fixed seat (61), a fixed bolt (62), and an auxiliary plate (63), the fixed seat (61) is vertically fixedly installed on the right side inner surface of the machine shell (13), the fixed seat (61) is fixedly connected with the machine shell (13) through the fixed bolt (62), and the auxiliary plate (63) is fixedly connected with the top side surface of the fixed seat (61); The end of the fixed bolt (62) on the surface of the fixed seat (61) is threadedly connected with the side surface of the machine shell (13), and the top side of the auxiliary plate (63) fixedly connected with the top side of the fixed seat (61) is in the same horizontal plane as the top side surface of the conveying belt of the first conveyor (3).

6. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The adjustable conveying assembly includes a servo motor (71), a first gear (72), a second gear (73), a threaded column (74), a threaded sleeve (711) and a mounting frame (710), the servo motor (71) is fixedly installed on the inner wall of the top side of the shell (13), the output end of the servo motor (71) is connected with the first gear (72), one side of the first gear (72) is connected with the second gear (73) in a meshing mode, the inner cavity of the second gear (73) is fixedly connected with the threaded sleeve (711), the inner cavity of the threaded sleeve (711) is threadedly connected with the threaded column (74), and the bottom end of the threaded column (74) is fixedly connected with the mounting frame (710).

7. The closure device for aseptic liquid food packaging bags according to claim 6, characterized in that: The top side of the second gear (73) is provided with a limiting ring (77) sleeved on the surface of the threaded column (74), the top end of the threaded column (74) is fixedly connected with a limiting seat (75), and the side surface of the limiting ring (77) is fixedly connected with the top side of the shell (13) through a fixing frame (76). The bottom end of the threaded sleeve (711) is provided with a rotating ring sleeved on the surface of the threaded column (74).

8. The closure device for aseptic liquid food packaging bags according to claim 6, characterized in that: The top side surface of the mounting frame (710) is fixedly connected with guide columns (78) in a symmetrical mode, the top end of the guide column (78) penetrates through the inner cavity of a guide cylinder (79), and the guide cylinder (79) is fixedly installed on the inner wall of the shell (13).

9. The closure device for aseptic liquid food packaging bags according to claim 1, characterized in that: The adjustable hot pressing assembly (8) includes an adjusting plate (81), a guide frame (82), a fastening bolt (83), a fixed frame (84), a rotating roller (85), an electric heating ring (86), a heat conduction cylinder (87) and an electric heating plate (88), the guide frame (82) is fixedly installed on the top front surface of the shell (13), the inner cavity of the guide frame (82) penetrates through the adjusting plate (81), the surface of the guide frame (82) is threadedly connected with the fastening bolt (83), the bottom end of the adjusting plate (81) is fixedly connected with the fixed frame (84), the inner wall of the fixed frame (84) is rotatably connected with the rotating roller (85), the surface of the rotating roller (85) is sleeved with the electric heating ring (86), the outer side surface of the electric heating ring (86) is sleeved with the heat conduction cylinder (87), and the bottom side of the heat conduction cylinder (87) is provided with the electric heating plate (88).

10. The closure device for aseptic liquid food packaging bags according to claim 9, characterized in that: A plurality of rotating rollers (85) are fixedly installed on the inner wall of the fixed frame (84) and are distributed at equal intervals between adjacent rotating rollers (85), the bottom side of the rotating roller (85) is provided with the electric heating plate (88), the electric heating plate (88) is fixedly installed on the front side surface of the supporting plate (4), and the top side surface of the electric heating plate (88) is in the same horizontal plane as the top side surface of the conveying belt of the first conveyor (3).

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