Lengthened ceramic heating core

Abstract

The utility model relates to the technical field of ceramic heating cores, and discloses a lengthened ceramic heating core which comprises a first ceramic chip and a second ceramic chip, a heating cavity is formed in the middle of one side, opposite to the first ceramic chip, of the second ceramic chip, and a tungsten slurry printed circuit is coated inside the heating cavity. A sealing plate and a sealing groove are arranged on the opposite sides of the first ceramic plate and the second ceramic plate. According to the lengthened ceramic heating core, the sealing plate 11 and the sealing groove 12 are arranged in a matched mode, the situation that the tungsten paste printed circuit 9 leaks when the first ceramic chip 1 and the second ceramic chip 2 are in butt joint can be prevented, and therefore it can be guaranteed that the heating core after sintering forming can be normally used.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic heating cores, and specifically relates to an elongated ceramic heating core. Background Technique

[0002] A film blowing machine melts plastic particles and then blows them into films. There are many types of film blowing machines, such as PE, POF, PVC, etc. The new materials blown out by using particles have uniform color, are clean, and have good stretchability. The film blowing machine mainly consists of a power part and a heating part. The power part drives the supply, movement, and shaping of materials, and the heating part melts the plastic particles. The heating element of the traditional film blowing machine uses resistance heating, which has high requirements for safety and insulation. Resistance heating has many disadvantages such as low thermal energy utilization rate, large thermal energy loss, long heating time, and low efficiency. Moreover, when the heating element is used for a long time, its shape is not regular enough, warping and deformation occur, and gaps are easily generated, requiring the heating element to have high strength and stability, resulting in a high production cost of the heating element, which restricts the improvement of the production efficiency of the film blowing machine.

[0003] To solve the above technical problems, the Chinese utility model patent with the authorization announcement number CN208337910U discloses a high-power industrial heater. This utility model uses tungsten paste printing circuit, which is convenient for batch processing, simplifies the process, and effectively reduces the processing cost. At the same time, circuit grooves and counterbores are provided to ensure the flatness of the shape of the heating element after sintering, which is convenient for processing. During use, it is firm and durable, has stable performance, improves quality and safety, and has good heating uniformity, high power density, and small volume, ensuring the uniform heating and melting of plastic particles and having a long service life;

[0004] Although the technical solution provided by this utility model solves the problems of low thermal energy utilization rate and long heating time existing in the existing heating core during use, however, since tungsten paste is coated between two ceramic sheets, when the tungsten paste is coated, the two ceramic sheets need to be butted and squeezed in, so it is possible to squeeze the tungsten paste coated between the two ceramic sheets until it leaks, resulting in the abnormal use of the ceramic heating core. Content of the Utility Model

[0005] The purpose of the present utility model is to provide an elongated ceramic heating core to solve the problems raised in the above background technique.

[0006] The embodiments of the present application adopt the following technical solutions:

[0007] An elongated ceramic heating core includes a first ceramic sheet and a second ceramic sheet. A heating cavity is provided in the middle of the side of the second ceramic sheet opposite to the first ceramic sheet. A tungsten paste printing circuit is coated inside the heating cavity. A sealing plate and a sealing groove are provided on the opposite sides of the first ceramic sheet and the second ceramic sheet. The sealing plate encloses a polygon and the sealing plate can be inserted into the sealing groove.

[0008] Beneficial effects:

[0009] Through the cooperation between the sealing plate 11 and the sealing groove 12, the utility model can prevent the tungsten paste printed circuit 9 from leaking when the first ceramic sheet 1 and the second ceramic sheet 2 are butted, so as to ensure the normal use of the heating core after sintering and forming.

[0010] Preferably, the number of the sealing plates is four, and the four sealing plates are respectively fixedly installed around the side of the first ceramic sheet facing the second ceramic sheet. The sealing groove is formed at the edge of the second ceramic sheet and is adapted to the number and shape of the sealing plates.

[0011] Preferably, a plurality of reinforcing plates are fixedly installed inside the heating cavity. A U-shaped notch is formed on the lower side of the reinforcing plate, and the tungsten paste printed circuit is located in the U-shaped notch. The plurality of reinforcing plates are uniformly arranged along the length direction of the heating cavity.

[0012] Preferably, the reinforcing plate is made of silicon nitride ceramic material.

[0013] Preferably, the tungsten paste printed circuit is electrically connected to the electrode pad. An electrode groove for fixing the electrode pad is formed on the side of the second ceramic sheet facing the first ceramic sheet. The electrode groove penetrates through one side of the second ceramic sheet. The electrode pad is connected with a nickel wire lead. The nickel wire lead passes through the electrode groove and extends to the outside of the second ceramic sheet. A Teflon insulating tube in contact sealing with the electrode groove is sleeved outside the nickel wire lead. One end of the nickel wire lead is connected with a lead wire.

[0014] Preferably, the outside of the lead wire is wrapped with solder. Description of the drawings

[0015] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0016] Figure 1 is the front view structural schematic diagram of the utility model;

[0017] Figure 2 is the top view structural schematic diagram of the utility model;

[0018] Figure 3 is the top view structural schematic diagram of the second ceramic sheet of the utility model;

[0019] Figure 4 is the front view partial sectional structural schematic diagram of the utility model;

[0020] Figure 5The figure is a bottom view structural schematic diagram of the first ceramic sheet of the utility model.

[0021] In the figure: 1. The first ceramic sheet; 2. The second ceramic sheet; 3. Teflon insulating tube; 4. Lead wire; 5. Electrode pad; 6. Nickel wire conductor; 7. Electrode groove; 8. Heating cavity; 9. Tungsten paste printed circuit; 10. Reinforcing plate; 11. Sealing plate; 12. Sealing groove. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0023] The following will, with reference to the drawings, elaborate on the technical solutions provided by each embodiment of this application.

[0024] Please refer to Figures 1-5 , an elongated ceramic heating core; including a first ceramic sheet 1 and a second ceramic sheet 2. A heating cavity 8 is provided in the middle of the side of the second ceramic sheet 2 opposite to the first ceramic sheet 1. A tungsten paste printed circuit 9 is coated inside the heating cavity 8. A sealing plate 11 and a sealing groove 12 are provided on the side of the first ceramic sheet 1 and the second ceramic sheet 2 opposite to each other;

[0025] The number of the sealing plates 11 is four. The four sealing plates 11 are respectively fixedly installed around the side of the first ceramic sheet 1 facing the second ceramic sheet 2. The four sealing plates 11 enclose a rectangle. The sealing groove 12 is opened at the edge of the second ceramic sheet 2 and is adapted to the number and shape of the sealing plates 11;

[0026] A number of reinforcing plates 10 are fixedly installed inside the heating cavity 8. A U-shaped notch is provided on the lower side of the reinforcing plate 10, and the tungsten paste printed circuit 9 is located within the U-shaped notch. The number of the reinforcing plates 10 is evenly arranged along the length direction of the heating cavity 8;

[0027] The reinforcing plate 10 is made of silicon nitride ceramic material. Silicon nitride ceramic has excellent mechanical strength and hardness, which is higher than that of alumina ceramic. It can withstand greater external pressure and impact load. Silicon nitride ceramic also has excellent high-temperature stability and can maintain good mechanical properties and chemical stability in a high-temperature environment. Its service temperature range is usually between 1000°C and 1400°C, and it can stably support the sintered heating core. Through the U-shaped notch, the tungsten paste printed circuit 9 is not in contact with the reinforcing plate 10, thus ensuring the normal use of the tungsten paste printed circuit 9;

[0028] The tungsten paste printed circuit 9 is electrically connected to the electrode pad 5. An electrode groove 7 for fixing the electrode pad 5 is provided on the side of the second ceramic sheet 2 facing the first ceramic sheet 1. The electrode groove 7 penetrates through one side of the second ceramic sheet 2. The electrode pad 5 is connected with a nickel wire lead 6. The nickel wire lead 6 passes through the electrode groove 7 and extends to the outside of the second ceramic sheet 2. A Teflon insulating tube 3 in contact and sealed with the electrode groove 7 is sleeved outside the nickel wire lead 6. The other end of the nickel wire lead 6 is connected with a lead wire 4;

[0029] The outside of the lead wire 4 is wrapped with solder. By wrapping the outside of the lead wire 4 with solder, it is convenient for the heating core to be connected to external components through the lead wire 4;

[0030] When the utility model is in use, the staff first coat the tungsten paste printed circuit 9 in a specific shape inside the heating cavity 8, then align the sealing plate 11 on the first ceramic sheet 1 with the sealing groove 12 on the second ceramic sheet 2, then press the first ceramic sheet 1 to insert the sealing plate 11 into the sealing groove 12, and finally put the butted first ceramic sheet 1 and the second ceramic sheet 2 into a reducing atmosphere at 1650 °C for firing and forming. Through the matching setting between the sealing plate 11 and the sealing groove 12, it can prevent the tungsten paste printed circuit 9 from leaking when the first ceramic sheet 1 and the second ceramic sheet 2 are butted. At the same time, when the first ceramic sheet 1 and the second ceramic sheet 2 are butted, the top of the reinforcing plate 10 contacts one side of the first ceramic sheet 1. By providing a plurality of reinforcing plates 10, the butted first ceramic sheet 1 and the second ceramic sheet 2 can be supported, and the overall strength of the heating core can be improved.

[0031] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An extended ceramic heating core, comprising a first ceramic sheet and a second ceramic sheet, characterized in that: A heating chamber is provided in the middle of a side of the second ceramic sheet opposite to the first ceramic sheet, and a tungsten paste printed circuit is coated inside the heating chamber. A sealing plate and a sealing groove are provided on a side of the first ceramic sheet opposite to the second ceramic sheet, and the sealing plates are enclosed into a polygon and can be inserted into the sealing groove.

2. The extended ceramic heating core according to claim 1, characterized in that: There are four sealing plates, which are respectively fixedly mounted around the first ceramic sheet on one side facing the second ceramic sheet. The sealing groove is arranged at the edge of the second ceramic sheet and matches the number and shape of the sealing plates.

3. The extended ceramic heating core according to claim 2, characterized in that: A plurality of reinforcing plates are fixedly installed inside the heating chamber, a U-shaped notch is opened on the lower side of the reinforcing plate, and the tungsten paste printed circuit is located in the U-shaped notch, and the plurality of reinforcing plates are evenly arranged along the length direction of the heating chamber.

4. The extended ceramic heating core according to claim 3, characterized in that: The reinforcing plate is made of silicon nitride ceramic material.

5. The extended ceramic heating core according to claim 1, characterized in that: The tungsten slurry printed circuit is electrically connected to the electrode pad. An electrode groove for fixing the electrode pad is opened on the side of the second ceramic sheet facing the first ceramic sheet. The electrode groove runs through one side of the second ceramic sheet. The electrode pad is connected to a nickel wire conductor. The nickel wire conductor passes through the electrode groove and extends to the outside of the second ceramic sheet. The outside of the nickel wire conductor is sheathed with a Teflon insulating tube that is in contact and sealed with the electrode groove. One end of the nickel wire conductor is connected to a lead.

6. The extended ceramic heating core according to claim 5, characterized in that: The outer side of the lead is wrapped with solder.

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