Electric heating plate and packaging equipment

Abstract

The present invention provides an electric heating plate and packaging equipment, which relates to the technical field of electric heating equipment, and solves the technical problem that the packaging equipment in the prior art cannot ensure fast cooling and heating while satisfying the uniformity of PET film heating, while also taking into account the processing and production of conventional EVA films and other related films. The device includes an electric heating layer, a heat-conducting layer and a pipeline layer stacked in sequence; wherein the electric heating layer includes an electric heating tube arranged inside the electric heating layer; the pipeline layer includes a pipeline arranged inside the pipeline layer, and the pipeline is used to circulate a cooling medium or a heating medium; the heat-conducting layer is evenly arranged between the electric heating layer and the pipeline layer. The present invention is used for product packaging, the electric heating layer is used to achieve rapid heating, and the cooling medium or the heating medium can be used in the pipeline layer for rapid cooling or auxiliary heating, thereby adapting to the use of rapid cooling and heating or conventional films, so that the packaging equipment can take into account the use of multiple types of films to package the product.

Description

Technical Field

[0001] The invention relates to the technical field of electric heating equipment, and in particular to an electric heating plate and packaging equipment. Background Art

[0002] The current PET film (polyester film) packaging process in the industry requires the packaging equipment to cool and heat quickly, while also meeting the requirements of heating uniformity and energy conservation and emission reduction. The current packaging equipment cannot achieve this in an integrated manner, while also taking into account the production of conventional EVA films (environmentally friendly films) and other related films.

[0003] Therefore, it is necessary to design an electric heating plate and packaging equipment to solve the technical problem that the current packaging equipment cannot ensure fast cooling and heating while meeting the heating uniformity of the PET film, while also taking into account the processing and production of conventional EVA films and other related films. Summary of the invention

[0004] The purpose of the present invention is to provide an electric heating plate and packaging equipment, which solves the technical problem that the packaging equipment in the prior art cannot ensure fast cooling and heating while satisfying the uniformity of PET film heating, while also taking into account the processing and production of conventional EVA films and other related films. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The electric heating plate provided by the present invention comprises an electric heating layer, a heat conducting layer and a pipeline layer which are stacked in sequence;

[0007] The electric heating layer includes an electric heating tube arranged inside the electric heating layer;

[0008] The pipeline layer includes pipelines arranged inside the pipeline layer, and the pipelines are used to circulate cooling medium or heating medium;

[0009] The heat-conducting layer is evenly arranged between the electric heating layer and the pipeline layer.

[0010] Preferably, the electric heating layer also includes a heat-conducting medium, a mounting hole is arranged in the electric heating layer, the electric heating pipe is passed through the mounting hole, and the heat-conducting medium is arranged between the electric heating pipe and the inner wall of the mounting hole.

[0011] Preferably, it also includes a vacuum pipeline, which is arranged in the pipeline layer and is used to connect to a vacuum pumping system. The pipeline layer is provided with an air pumping hole, which is connected to the vacuum pipeline.

[0012] Preferably, the number of the vacuum pipes is two and they are respectively arranged near the edge positions on both sides of the pipeline layer, and the number of the air extraction holes is multiple and they are evenly arranged in the length direction of the vacuum pipe.

[0013] Preferably, a connector is provided at one end of the electric heating tube, and the connector is connected to a port of the mounting hole.

[0014] Preferably, it also includes reinforcing ribs, which are arranged between the electric heating layer and the pipeline layer.

[0015] Preferably, the number of the electric heating tubes is multiple and they are evenly and side by side arranged in the electric heating layer, the number of the pipelines is multiple and they are evenly and side by side arranged in the pipeline layer, and the heat conductive layer includes a carbon fiber plate.

[0016] The packaging equipment provided by the present invention comprises the above-mentioned electric heating plate.

[0017] Preferably, it also includes a frame, an upper cavity plate and a lifting mechanism, the electric heating plate is arranged on the frame, the upper cavity plate is arranged above the electric heating plate, one side of the upper cavity plate is hinged to the frame, the upper cavity plate and the frame are connected through the lifting mechanism, the lifting mechanism is used to drive the upper cavity plate and the electric heating plate to be buckled or moved away, a rubber strip frame is provided on the side of the upper cavity plate close to the electric heating plate, and when the upper cavity plate is buckled on the electric heating plate, a accommodating cavity is formed between the upper cavity plate and the electric heating plate.

[0018] Preferably, the lifting mechanism includes a screw-type electric push cylinder and a lifting support seat, one end of the screw-type electric push cylinder is connected to the frame, and the other end is connected to the upper cavity plate through the lifting support seat, a strip hole is provided on the lifting support seat, and the screw-type electric push cylinder is slidingly connected to the strip hole.

[0019] The technical solution provided by the present invention comprises an electric heating layer, a heat-conducting layer and a pipeline layer which are stacked in sequence; wherein the electric heating layer comprises an electric heating tube arranged inside the electric heating layer; the pipeline layer comprises a pipeline arranged inside the pipeline layer, and the pipeline is used for circulating a cooling medium or a heating medium; the heat-conducting layer is evenly arranged between the electric heating layer and the pipeline layer, the electric heating layer is used for realizing the rapid heating effect of the electric heating plate, and the heat-conducting layer is used for realizing uniform heat conduction of the heat generated by the electric heating layer, thereby ensuring uniform temperature on the electric heating plate, and the cooling medium or the heating medium can be introduced into the pipeline in the pipeline layer, thereby achieving the effect of rapidly cooling the electric heating plate or auxiliary heating the heating plate, thereby being able to adapt to the packaging of different films, and finally enabling the packaging equipment to take into account a variety of types of films to package the product.

[0020] The preferred technical solution of the present invention can at least produce the following technical effects: the electric heating layer also includes a heat-conducting medium, a mounting hole is set in the electric heating layer, the electric heating pipe is passed through the mounting hole, and a heat-conducting medium is set between the electric heating pipe and the inner wall of the mounting hole. The use of the heat-conducting medium is used to achieve the filling of the redundant part of the mounting hole, indirectly assisting the uniform conduction of heat of the electric heating pipe, so that the heating uniformity of the whole pipe body is consistent, and there is no problem of excessive local point temperature;

[0021] It also includes a vacuum pipeline, which is arranged in the pipeline layer and used to connect the vacuum pumping system. The pipeline layer is provided with an air extraction hole, which is connected to the vacuum pipeline. The vacuum pipeline is arranged to integrate the vacuum pumping system, thereby realizing the optimal integration of functions.

[0022] There are two vacuum pipes, which are respectively arranged near the edges of both sides of the pipeline layer. There are multiple air extraction holes, which are evenly arranged in the length direction of the vacuum pipes. The vacuum pipes are arranged on both sides, and the internal packaging structure is vacuumed on both sides at the same time, thereby improving work efficiency.

[0023] A connector is provided at one end of the electric heating tube, and the connector is connected to the port of the mounting hole. The electric heating tube is connected to the mounting hole through the connector, so that the installation of the electric heating tube is more stable;

[0024] It also includes reinforcing ribs, which are arranged between the electric heating layer and the pipeline layer. The arrangement of the reinforcing ribs prevents the wear and deformation of the heat-conducting layer caused by the deformation of the electric heating plate in a vacuum state during operation, and also plays a role in spacing and fixing;

[0025] There are multiple electric heating tubes that are evenly and side by side arranged in the electric heating layer. The multiple evenly arranged electric heating tubes make the heating of the heating plate more evenly to avoid the problem of local over-temperature. There are multiple pipelines that are evenly and side by side arranged in the pipeline layer. Similarly, when passing through different media, uniform fast cooling or auxiliary heating can be achieved. The heat conduction layer adopts a carbon fiber plate structure to achieve the most efficient heat conduction.

[0026] The jacking mechanism includes a screw-type electric push cylinder and a jacking support seat. One end of the screw-type electric push cylinder is connected to the frame, and the other end is connected to the upper cavity plate through the jacking support seat. A strip hole is arranged on the jacking support seat, and the screw-type electric push cylinder is slidingly connected to the strip hole. The use of the screw-type electric push cylinder realizes the gasification of the whole equipment. At the same time, the use of the screw-type electric push cylinder solves the disadvantages of unstable pressure of the gas source, high water content requirement and large shrinkage, making the structure more reasonable and increasing the service life. The use of this electric cylinder has the advantages of high efficiency and energy saving, avoiding the support of a large-volume air compressor system, only needs a small-power 220v AC power to work stably, and has its own holding function; under the action of vacuum, the electric cylinder will need to further descend after it is in place, and the strip hole design absorbs all the descending stroke, making the structure more reasonable and feasible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of the electric heating plate provided in an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a cross-sectional structure of an electric heating plate provided in an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of a cross-sectional structure of a pipeline layer provided by an embodiment of the present invention;

[0031] Figure 4 The heating layer and the heat conducting layer are provided in the embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of the structure of an electric heating tube provided by an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of the three-dimensional structure of a packaging device provided by an embodiment of the present invention;

[0034] Figure 7 yes Figure 6 A schematic diagram of the partially enlarged structure;

[0035] Figure 8 is a schematic diagram of the three-dimensional structure of the upper cavity plate provided in an embodiment of the present invention;

[0036] Fig. 9 It is a schematic diagram of the cross-sectional structure of the upper cavity plate provided in an embodiment of the present invention.

[0037] In the figure, 1, electric heating layer; 2, heat conduction layer; 3, pipeline layer; 4, electric heating tube; 5, pipeline; 6, heat conduction medium; 7, installation hole; 8, vacuum pipe; 9, exhaust hole; 10, connector; 11, reinforcing rib; 12, frame; 13, upper cavity plate; 14, lifting mechanism; 15, rubber strip frame; 16, screw-type electric push cylinder; 17, lifting support seat; 18, strip hole; 19, zero pressure difference induction valve. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] A specific embodiment of the present invention provides an electric heating plate, as shown in the attached Figure 1 and attached Figure 2 As shown, it includes an electric heating layer 1, a heat conducting layer 2 and a pipeline layer 3 which are stacked in sequence; wherein the electric heating layer 1 is located at the bottom layer, the heat conducting layer 2 is located at the middle layer, and the pipeline layer 3 is located at the upper layer. The electric heating layer 1 is used to provide heat for the entire electric heating plate. The electric heating layer 1 includes an electric heating tube 4 arranged inside the electric heating layer 1. The electric heating form of the electric heating tube 4 is adopted to achieve rapid heating.

[0040] The pipeline layer 3 includes a pipeline 5 arranged inside the pipeline layer 3, and the pipeline 5 is used to circulate cooling medium or heating medium; when PET film is used for packaging, a fast heating and cooling processing method is required, and after packaging one product, it needs to be cooled before packaging the next product; however, the processing and production of EVA film and other related films need to be carried out at a relatively high temperature. Therefore, a heating medium is introduced into the pipeline 5 to assist the electric heating layer 1 in heating. In order to make the heat conducted by the electric heating layer 1 uniform, the heat-conducting layer 2 is uniformly arranged between the electric heating layer 1 and the pipeline layer 3, and the heat of the electric heating layer 1 is uniformly conducted to the top of the electric heating plate for heating through the heat-conducting layer 2.

[0041] By changing the medium introduced into the pipeline 5, various types of membranes can be made compatible, thereby indirectly improving the compatibility of the packaging equipment; and the use of the heat-conducting layer 2 can effectively achieve uniform heat conduction and avoid the problem of excessive local temperature.

[0042] The electric heating layer 1 also includes a heat-conducting medium 6. A mounting hole 7 is arranged in the electric heating layer 1. The electric heating tube 4 is passed through the mounting hole 7. A heat-conducting medium 6 is arranged between the electric heating tube 4 and the inner wall of the mounting hole 7. The heat-conducting medium 6 can be a heat-conducting self-expanding material wrapped around the outside of the electric heating tube 4, or a heat-conducting solvent filled between the inner wall of the mounting hole 7 and the electric heating tube 4. The main function of the heat-conducting medium 6 is to achieve efficient temperature conduction. When the temperature of the electric heating tube 4 rises, the heat-conducting medium 6 will expand to a certain extent, so that the heat-conducting material and the mounting hole 7 are seamlessly and tightly connected, ensuring the uniform propagation of temperature and avoiding the problem of local overtemperature. The heat-conducting medium 6 used in the present application can be a thermal grease. When installing the electric heating tube 4, first fill a sufficient amount of thermal grease in the mounting hole 7, then insert the electric heating tube 4, and after connecting the electric heating tube 4, wipe off the overflowed thermal grease.

[0043] The electric heating plate provided in the specific embodiment of the present application also integrates a vacuum system. A vacuum pipe 8 is provided in the pipeline layer 3, and the vacuum pipe 8 is used to connect the vacuum system, so that the vacuum system is integrated into the electric heating plate. An exhaust hole 9 is provided on the pipeline layer 3, and the exhaust hole 9 is connected to the vacuum pipe 8. The vacuum system is connected to one end of the vacuum pipe 8. The product packaging on the electric heating plate is vacuumed through the exhaust hole 9. The vacuum system is integrated by providing the vacuum pipe 8, thereby achieving optimal integration of functions.

[0044] In order to effectively extract the air from the product packaging, two vacuum pipes 8 can be set up, and they can be respectively set near the edges of both sides of the pipeline layer 3. The vacuum pipe 8 can be set side by side with the pipe 5, and the number of exhaust holes 9 can be designed to be multiple, and the multiple exhaust holes 9 are evenly distributed in the length direction of the vacuum pipe 8.

[0045] In order to realize the connection between the electric heating tube 4 and the mounting hole 7, a connector 10 can be provided at one end of the electric heating tube, and the connector 10 is connected to the end of the mounting hole 7. The connector 10 has an external thread, and the mounting hole 7 is provided with an internal thread adapted thereto, and the electric heating tube 4 is fixed by screwing.

[0046] Since the electric heating plate is usually used in packaging equipment, a vacuum operation is required when packaging products, so it is necessary to design a reinforcing rib 11 to prevent the deformation of the electric heating plate in a vacuum state during operation, causing wear and deformation of the heat conductive layer, and at the same time play a role in spacing and fixing. The reinforcing rib 11 is arranged between the electric heating layer 1 and the pipeline layer 3, as shown in the attached Figure 4 As shown, there can be multiple reinforcing ribs 11, and their setting direction is the same as the setting direction of the pipeline 5, and they are evenly arranged in a direction perpendicular to the pipeline 5. The reinforcing ribs 11 can be designed as an integral part between the plate body of the electric heating layer 1.

[0047] In the electric heating plate provided in the specific embodiment of the present application, the electric heating layer 1 and the pipeline layer 3 are both plate structures, and the edge positions of the two plates are fixed by bolts. The number of electric heating tubes 4 is multiple and evenly and side by side arranged in the electric heating layer 1. The multiple and even arrangement of the electric heating tubes 4 can effectively achieve rapid heating; the number of pipelines 5 is multiple and evenly and side by side arranged in the pipeline layer 3, and the pipelines 5 can be connected through a header. The optimal solution adopts a serpentine tube structure to facilitate the introduction of flowing cooling medium or heating medium in the pipeline 5. The heat conductive layer 2 in the present application adopts a structure including a carbon fiber plate, which can well achieve rapid heat conduction.

[0048] The present application also provides a packaging device, such as the attached Figure 6The above-mentioned electric heating plate is shown. This packaging equipment using the above-mentioned electric heating plate can be applied to the packaging of various types of membrane products, which greatly improves the compatibility of the packaging equipment.

[0049] The packaging device also includes a frame 12, an upper cavity plate 13 and a lifting mechanism 14. The frame 12 is a frame structure for stably installing various components. The electric heating plate is arranged on the frame 12, and the upper cavity plate 13 is also arranged on the frame 12. The function of the upper cavity plate 13 is to buckle and extrude the product after the product is placed on the electric heating plate, and to vacuum-pack the product in cooperation with the vacuum system. The upper cavity plate 13 is arranged above the electric heating plate, and one side of the upper cavity plate 13 is hinged to the frame 12, that is, the upper cavity plate 13 can be opened and closed and arranged on the frame 12. The upper cavity plate 13 and the frame 12 are also connected by a lifting mechanism 14. The lifting mechanism 14 is used to drive the upper cavity plate 13 to buckle with or move away from the electric heating plate, as shown in the attached Figure 8 and attached Fig. 9 As shown, a rubber strip frame 15 is provided on one side of the upper cavity plate 13 close to the electric heating plate. When the upper cavity plate 13 is buckled on the electric heating plate, a receiving cavity is formed between the upper cavity plate 13 and the electric heating plate. The product is received in the receiving cavity and the rubber strip frame 15 is pressed against the electric heating plate.

[0050] The lifting mechanism 14 includes a screw-type electric push cylinder 16 and a lifting support seat 17. The structure of the screw-type electric push cylinder 16 is adopted to realize the non-gasification of the whole equipment. At the same time, the use of the screw-type electric push cylinder 16 solves the disadvantages of unstable pressure of the gas source, high water content requirement and large shrinkage, making the structure more reasonable and increasing the service life. The use of this electric cylinder has the advantages of high efficiency and energy saving, avoiding the support of a large-volume air compressor system, and only needs a small-power 220V AC power to work stably, and it has a self-holding function. One end of the screw-type electric push cylinder 16 is connected to the frame 12, and the other end is connected to the side wall of the upper cavity plate 13 through the lifting support seat 17. A strip hole 18 is also provided on the lifting support seat 17, and the screw-type electric push cylinder 16 is slidably connected to the strip hole 18. Because the upper cavity plate 13 is under the action of vacuum, the electric cylinder will need to further descend after it is in place. The design of the strip hole 18 absorbs all the descending stroke, making the structure more reasonable and feasible. One end of the screw-type electric push cylinder 16 is slidably connected to the strip hole 18. After the screw-type electric push cylinder 16 pulls the upper cavity plate 13 to snap together and stops working, the thickness of the product in the upper cavity plate 13 is reduced due to the effect of vacuum extraction. At this time, the upper cavity plate 13 will continue to move downward, and the strip hole 18 will not affect the continued movement of the upper cavity plate 13.

[0051] In the packaging device provided in the specific embodiment of the present application, as shown in the attached Figure 6The zero pressure difference induction valve 19 shown in the figure has revolutionized the vacuum butterfly valve used in the industry. The rubber ring of the vacuum butterfly valve will age after a period of use, and there is a risk of getting stuck and unable to work. At the same time, it requires an air source to drive. The use of this zero pressure difference induction valve 19 has many advantages such as high efficiency, large diameter, low-power electronic control, and long service life. Its one-way function is fully utilized, and the use of quick-release clamps makes the installation, positioning and replacement of the entire system more convenient.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electric heating plate, characterized in that: It comprises an electric heating layer (1), a heat conducting layer (2) and a pipeline layer (3) which are stacked in sequence; The electric heating layer (1) comprises an electric heating tube (4) arranged inside the electric heating layer (1); The pipeline layer (3) comprises a pipeline (5) arranged inside the pipeline layer (3), and the pipeline (5) is used to circulate a cooling medium or a heating medium; The heat-conducting layer (2) is evenly arranged between the electric heating layer (1) and the pipeline layer (3); The electric heating layer (1) further comprises a heat-conducting medium (6); a mounting hole (7) is arranged in the electric heating layer (1); the electric heating pipe (4) is passed through the mounting hole (7); and the heat-conducting medium (6) is arranged between the electric heating pipe (4) and the inner wall of the mounting hole (7); It also comprises a vacuum pipe (8), wherein the vacuum pipe (8) is arranged in the pipeline layer (3), and the vacuum pipe (8) is used to connect to a vacuum pumping system; an air pumping hole (9) is arranged on the pipeline layer (3), and the air pumping hole (9) is in communication with the vacuum pipe (8).

2. The electric heating plate according to claim 1, characterized in that: The number of the vacuum pipes (8) is two and they are respectively arranged near the edge positions on both sides of the pipeline layer (3); the number of the air extraction holes (9) is multiple and they are evenly arranged in the length direction of the vacuum pipe (8).

3. The electric heating plate according to claim 1, characterized in that: A connector (10) is provided at one end of the electric heating tube (4), and the connector (10) is connected to the port of the mounting hole (7).

4. The electric heating plate according to claim 1, characterized in that: It also includes reinforcing ribs (11), wherein the reinforcing ribs (11) are arranged between the electric heating layer (1) and the pipeline layer (3).

5. The electric heating plate according to claim 1, characterized in that: The number of the electric heating tubes (4) is multiple and they are evenly and side by side arranged in the electric heating layer (1); the number of the pipelines (5) is multiple and they are evenly and side by side arranged in the pipeline layer (3); and the heat conducting layer (2) comprises a carbon fiber plate.

6. A packaging device, characterized in that: It comprises the electric heating plate described in any one of claims 1 to 5.

7. The packaging device according to claim 6, characterized in that The invention also comprises a frame (12), an upper cavity plate (13) and a lifting mechanism (14); the electric heating plate is arranged on the frame (12); the upper cavity plate (13) is arranged above the electric heating plate; one side of the upper cavity plate (13) is hinged to the frame (12); the upper cavity plate (13) and the frame (12) are connected via the lifting mechanism (14); the lifting mechanism (14) is used to drive the upper cavity plate (13) to engage with or move away from the electric heating plate; a rubber strip frame (15) is arranged on one side of the upper cavity plate (13) close to the electric heating plate; when the upper cavity plate (13) is engaged with the electric heating plate, a receiving cavity is formed between the upper cavity plate (13) and the electric heating plate.

8. The packaging device according to claim 7, characterized in that: The lifting mechanism (14) comprises a screw-type electric push cylinder (16) and a lifting support seat (17); one end of the screw-type electric push cylinder (16) is connected to the frame (12), and the other end is connected to the upper cavity plate (13) through the lifting support seat (17); a strip hole (18) is provided on the lifting support seat (17), and the screw-type electric push cylinder (16) is slidably connected to the strip hole (18).

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