Variable automatic alarm device for ceramic copper clad laminate sintering furnace

Abstract

The utility model relates to a sintering furnace alarm device, concretely is a kind of ceramic copper clad plate sintering furnace variable automatic alarm device, including furnace body, the furnace body top is provided with furnace cover, the furnace body outer wall is fixedly provided with display screen, and the furnace body outer wall is also fixedly provided with warning light;The inner center of furnace body is liftable and is provided with the placing table for placing ceramic copper clad plate, and the heating component is fixedly arranged in the inner furnace body outside placing table, the furnace body outside is symmetrically provided with two nitrogen storage tanks, nitrogen storage tank is fixedly connected with air inlet pipe, and one end of air inlet pipe penetrates furnace body side wall and is in the inside of furnace body, the inner furnace body is also symmetrically fixedly provided with two air guide components, the air guide component is used to guide nitrogen to be blown to placing table evenly, and the inner wall of furnace body is fixedly provided with several thermocouples real-time monitoring temperature distribution, and hot-type mass flowmeter is fixedly arranged in air inlet pipe and monitors nitrogen flow.

Description

Technical Field

[0001] This utility model relates to a sintering furnace alarm device, and more particularly to an automatic variable alarm device for a ceramic copper-clad substrate sintering furnace. Background Technology

[0002] As a core material for power electronic devices, copper-clad ceramic substrates require extremely high temperature uniformity and stable protective atmosphere during their sintering process. The sintering process involves heating, holding, and cooling stages. Temperature fluctuations exceeding ±5℃ can reduce the bonding strength between the copper layer and the ceramic interface, and may even lead to defects such as substrate warping and cracking. Nitrogen, as a protective gas, requires careful attention; insufficient flow can cause copper oxidation, while excessive flow increases nitrogen consumption costs.

[0003] Chinese Patent No. CN222143750U discloses a sintering furnace for producing copper-clad ceramic substrates. This utility model allows for easier opening of the furnace lid and incorporates an internal circulation system to ensure uniform temperature throughout the furnace, thereby improving the welding quality of copper-clad ceramics.

[0004] When abnormal temperature distribution, excessive nitrogen flow, or uneven nitrogen distribution cannot be detected in time during sintering, product quality defects may occur. Utility Model Content

[0005] The main purpose of this invention is to provide an automatic alarm device for variable changes in a ceramic copper-clad substrate sintering furnace, so as to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of this utility model, an automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace is provided, comprising a furnace body, a furnace cover on the top of the furnace body, a display screen fixedly mounted on the outer wall of the furnace body, and an alarm light fixedly mounted on the outer wall of the furnace body; a lifting platform for placing ceramic copper-clad substrates is provided at the center of the furnace body, and a heating component is fixedly mounted outside the platform inside the furnace body; two nitrogen storage tanks are symmetrically arranged outside the furnace body, and an air inlet pipe is fixedly connected to the nitrogen storage tank, with one end of the air inlet pipe penetrating the side wall of the furnace body and located inside the furnace body; two air guiding components are also symmetrically fixedly mounted inside the furnace body, and the air guiding components are used to guide nitrogen gas to be blown evenly toward the platform; and several thermocouples are fixedly mounted on the inner wall of the furnace body.

[0007] Furthermore, a fixing rod is fixedly installed at the center of the bottom of the placement platform, and a screw groove is opened in the fixing rod. Two connecting rods are also symmetrically fixedly installed at the bottom of the placement platform, and a thermocouple is also fixedly installed at the bottom of the placement platform.

[0008] Furthermore, a fixed seat is fixedly installed at the center of the furnace body, the lower end of the fixed rod is slidably installed at the center of the fixed seat, and a screw is rotatably installed at the center of the fixed seat, the screw being threadedly installed in a screw groove.

[0009] Furthermore, the heating component includes a ring-shaped support, and a plurality of heating wires are fixedly disposed on the inner side of the support, and the heating wires are ring-shaped.

[0010] Furthermore, the air guiding component includes a fixed frame fixedly installed inside the furnace body, a limit rod slidably installed on the fixed frame, and several baffles rotatably installed on the limit rod.

[0011] Furthermore, a rotating shaft is symmetrically fixedly connected to one end of the baffle, and a number of limiting strips are fixedly connected to the outer wall of the rotating shaft in a ring array. A rotating groove is opened in the limiting rod, and the rotating shaft is rotatably disposed in the rotating groove. A number of limiting grooves communicating with the rotating groove are opened in a ring array in the limiting rod, and the limiting strips are elastically snapped into the limiting grooves.

[0012] Furthermore, one end of the air intake pipe is fixedly connected to several branch pipes, and the branch pipes are respectively located between two adjacent baffles, and a thermal mass flow meter is fixedly installed inside the air intake pipe.

[0013] Furthermore, the output terminal of the warning light is fixedly connected to the input terminal of the display screen.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this automatic alarm device for variable displacement of a ceramic copper-clad substrate sintering furnace, multiple thermocouples are arranged at key locations such as the center of the furnace and around the ceramic copper-clad substrate to monitor the temperature distribution in real time; a thermal mass flow meter is fixedly installed in the inlet pipe to monitor the nitrogen flow rate; when the thermocouples or thermal mass flow meter detect that the temperature or nitrogen flow rate in the furnace exceeds the maximum or minimum critical value, the PLC controls the warning light to flash red, the display screen displays the abnormal parameters simultaneously, and the voice component broadcasts an alarm, reducing operational risks and ensuring product quality.

[0016] 2. In this automatic alarm device for variable displacement of a ceramic copper-clad substrate sintering furnace, an adjustable tilt angle baffle is provided. This guides nitrogen gas to flow evenly to the ceramic copper-clad substrate on the placement platform, ensuring that the nitrogen gas is aligned with the product, and further guaranteeing the stability of the sintering process and the quality of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the automatic alarm device for variable load in the ceramic copper-clad substrate sintering furnace in a preferred embodiment of the present invention.

[0018] Figure 2This is a cross-sectional view of the automatic alarm device for variable load in the ceramic copper-clad substrate sintering furnace in a preferred embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the mounting structure of the placement platform in a preferred embodiment of the present invention;

[0020] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the overall structure of the heating component in a preferred embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the overall structure of the air guide component in a preferred embodiment of the present invention;

[0023] Figure 7 This is a partial structural cross-sectional view of the air guide component in a preferred embodiment of the present invention;

[0024] Figure 8 This is a preferred embodiment of the present invention. Figure 7 Enlarged schematic diagram of the structure at point B.

[0025] Figure label:

[0026] 1. Furnace body; 11. Display screen; 12. Warning light; 13. Furnace cover; 14. Fixing base; 141. Slide groove; 15. Screw; 16. Motor; 17. Gas outlet pipe;

[0027] 2. Placement platform; 21. Fixing rod; 22. Screw groove; 23. Connecting rod;

[0028] 3. Heating element; 31. Bracket; 32. Heating wire;

[0029] 4. Nitrogen storage tank; 41. Inlet pipe; 411. Branch pipe;

[0030] 5. Air guide components; 51. Fixing bracket; 52. Limiting rod; 521. Rotating groove; 522. Limiting groove; 53. Baffle; 531. Limiting strip;

[0031] 6. Thermocouple. Detailed Implementation

[0032] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0033] This embodiment provides an automatic alarm device for variable parameters in a ceramic copper-clad substrate sintering furnace, including a furnace body 1. A furnace cover 13 is provided on the top of the furnace body 1. A display screen 11 is fixedly provided on the outer wall of the furnace body 1, and an alarm light 12 is also fixedly provided on the outer wall of the furnace body 1. A placement platform 2 for placing ceramic copper-clad substrates is raised and lowered at the center of the furnace body 1. A heating component 3 is fixedly provided on the outside of the placement platform 2 inside the furnace body 1. Two nitrogen storage tanks 4 are symmetrically arranged on the outside of the furnace body 1. An air inlet pipe 41 is fixedly connected to the nitrogen storage tank 4. One end of the air inlet pipe 41 passes through the side wall of the furnace body 1 and is located inside the furnace body 1. Two air guide components 5 are also symmetrically fixedly arranged inside the furnace body 1. The air guide components 5 are used to guide nitrogen gas to blow evenly toward the placement platform 2. Several thermocouples 6 are fixedly provided on the inner wall of the furnace body 1.

[0034] like Figure 3 and Figure 4 As shown, a fixing rod 21 is fixedly installed at the center of the bottom of the placement platform 2. A screw groove 22 is opened in the fixing rod 21. Two connecting rods 23 are also symmetrically fixedly installed at the bottom of the placement platform 2. A thermocouple 6 is also fixedly installed at the bottom of the placement platform 2.

[0035] like Figure 3 and Figure 4 As shown, thermocouple 6 is used to monitor temperature changes at different locations inside the sintering furnace in real time. By arranging multiple points (such as inside the furnace, around the ceramic copper-clad substrate, etc.), the temperature distribution inside the furnace can be fully understood. It is mainly used to prevent product quality problems caused by local overheating or uneven cooling.

[0036] like Figure 3 and Figure 4 As shown, a fixed base 14 is fixedly installed at the center of the furnace body 1. The lower end of the fixed rod 21 is slidably installed at the center of the fixed base 14. A screw 15 is also rotatably installed at the center of the fixed base 14. The screw 15 is threadedly installed in the screw groove 22. A motor 16 is fixedly installed at the center of the bottom of the furnace body 1. The output shaft of the motor 16 passes through the furnace body 1 and is fixedly connected to the center of one end of the screw 15. A sliding groove 141 is symmetrically opened in the fixed base 14. The connecting rod 23 is slidably installed in the sliding groove 141. Therefore, the screw 15 is driven to rotate by the motor 16. The rotation of the screw 15 in the screw groove 22 drives the fixed rod 21 to move upward along the fixed base 14, thereby moving the placement platform 2 upward, which facilitates the placement of the ceramic copper-clad substrate. Since the connecting rod 23 is slidably installed in the sliding groove 141, the rotation of the screw 25 will not drive the fixed rod 21 to rotate, ensuring that the placement platform 2 can achieve the lifting function.

[0037] like Figure 2 and Figure 5As shown, the heating component 3 includes a ring-shaped support 31, and a plurality of heating wires 32 are fixedly arranged on the inner side of the support 31. The heating wires 32 are ring-shaped and surround the placement platform 2 to ensure that the ceramic copper-clad substrate is fully heated in the furnace body 1.

[0038] like Figure 2 , Figure 6 and Figure 7 As shown, the air guide component 5 includes a fixed frame 51 fixedly installed inside the furnace body 1, a limit rod 52 slidably installed on the fixed frame 51, and a plurality of baffles 53 rotatably installed on the limit rod 52.

[0039] like Figure 6 , Figure 7 and Figure 8 As shown, a rotating shaft is symmetrically fixedly connected to one end of the baffle 53. Several limiting strips 531 are fixedly connected to the outer wall of the rotating shaft in a circular array. A rotating groove 521 is formed inside the limiting rod 52, and the rotating shaft is rotatably disposed within the rotating groove 521. Several limiting grooves 522 communicating with the rotating groove 521 are formed in a circular array inside the limiting rod 52. The limiting strips 531 are elastically engaged within the limiting grooves 522, and the limiting strips 531 are made of silicone material, possessing a certain degree of shrinkage and recovery force. Therefore, when it is necessary to adjust the tilt angle of the baffle 53, it is pulled upwards along the fixing frame 51. The limiting rod 52 facilitates the rotation of the baffle 53. In specific operation, the baffle 53 is rotated around the rotation axis, and a certain force is applied to make the limiting strip 531 disengage from the current limiting groove 522. Then, the limiting strip 531 is compressed by the pressure between the inner wall of the rotating groove 521 and the outer wall of the baffle 53. Continue to rotate the baffle 53 until the limiting strip 531 is aligned with the next limiting groove 522 and returns to its original position. The limiting strip 531 is engaged in the limiting groove 522, thereby adjusting the tilt angle of the baffle 53. After adjustment, the limiting rod 52 is slid down along the fixing frame 51, so that the baffle 53 is located outside the heating component 3.

[0040] like Figure 1 , Figure 2 and Figure 6 As shown, one end of the air inlet pipe 41 is fixedly connected to several branch pipes 411, and the branch pipes 411 are respectively located between two adjacent baffles 53. Nitrogen gas enters the furnace body 1 evenly from the nitrogen storage tank 4 through the air inlet pipe 41 and then through the branch pipes 411. The baffles 53 ensure that the nitrogen gas is aligned with the ceramic copper-clad substrate on the placement platform 2. A thermal mass flow meter is fixedly installed in the air inlet pipe 41 to measure the flow rate of nitrogen gas entering the sintering furnace and ensure that an appropriate protective atmosphere is maintained throughout the sintering process. An exhaust pipe 17 is fixedly connected to the side wall of the furnace body 1 to discharge the nitrogen gas in the furnace body 1.

[0041] like Figure 1 and Figure 2 As shown, the automatic alarm device for the ceramic copper-clad substrate sintering furnace also includes a PLC. The PLC is used to receive detection signals from the thermocouple 6 and the thermal mass flow meter, and to control the warning light 12. When the thermocouple 6 or the thermal mass flow meter detects that the temperature or nitrogen flow rate inside the furnace 1 exceeds the maximum or minimum critical value, the thermocouple 6 or the thermal mass flow meter is triggered, and the PLC controls the warning light 12 to emit an alarm flashing red light. The output terminal of the warning light 12 is fixedly connected to the input terminal of the display screen 11, and a voice component is also fixedly installed inside the display screen 11. The output terminal of the warning light 12 is also fixedly connected to the input terminal of the voice component. Therefore, after the warning light 12 flashes red, it transmits a signal to the display screen 11 and the voice component. The display screen 11 immediately displays the current temperature and nitrogen flow rate inside the furnace 1, and the voice component broadcasts the current situation inside the furnace 1, effectively providing a warning and preventing danger from occurring.

[0042] In practical use, the motor 16 is started to drive the screw 15 to rotate. The screw 15, through its engagement with the screw groove 22 at the bottom of the fixed rod 21, drives the placement platform 2 to move upward. When the placement platform 2 reaches its highest point, it stops. The ceramic copper-clad substrate to be sintered is then placed smoothly on the placement platform 2. The motor 16 is started again, but the rotation direction is changed so that the screw 15 rotates in the opposite direction. At this time, the fixed rod 21 drives the placement platform 2 to move downward until it reaches the set working position at the center of the furnace body 1. The motor 16 is then turned off. According to the process requirements, the limiting rod 52 is pulled upward along the fixed frame 51, and the baffle 53 is rotated to a suitable angle. Then, the fixed frame 51 is pulled downward. Slide the limit rod 52; close the furnace cover 13, start the heating component 3 to begin heating, open the valve on the nitrogen storage tank 4 to allow nitrogen to enter the furnace body 1 through the inlet pipe 41 and its branch pipe 411, and use the baffle 53 to guide the nitrogen to flow evenly to the ceramic copper-clad substrate on the placement platform 2 to ensure that a proper protective atmosphere is maintained throughout the sintering process; if the thermocouple 6 or the thermal mass flow meter detects that the temperature or nitrogen flow exceeds the maximum or minimum critical value, the PLC receives the signal and triggers the warning light 12 to flash red, and then the display screen 11 displays the specific values ​​of the current temperature and nitrogen flow, and the voice component broadcasts the current situation inside the furnace to remind the operator to pay attention.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace, comprising a furnace body (1), wherein a furnace cover (13) is provided on the top of the furnace body (1), characterized in that, A display screen (11) is fixedly installed on the outer wall of the furnace body (1), and a warning light (12) is also fixedly installed on the outer wall of the furnace body (1); a placement platform (2) for placing a ceramic copper-clad substrate is raised and lowered at the center of the furnace body (1), and a heating component (3) is fixedly installed on the outside of the placement platform (2) inside the furnace body (1); two nitrogen storage tanks (4) are symmetrically arranged on the outside of the furnace body (1), and an air inlet pipe (41) is fixedly connected to the nitrogen storage tank (4), and one end of the air inlet pipe (41) penetrates the side wall of the furnace body (1) and is located inside the furnace body (1); two air guide components (5) are also symmetrically fixedly installed inside the furnace body (1), and the air guide components (5) are used to guide nitrogen gas to blow onto the placement platform (2); and several thermocouples (6) are fixedly installed on the inner wall of the furnace body (1).

2. The automatic alarm device for variable changes in the sintering furnace of ceramic copper-clad substrate according to claim 1, characterized in that, A fixing rod (21) is fixedly installed at the center of the bottom of the placement platform (2). A screw groove (22) is opened in the fixing rod (21). Two connecting rods (23) are also symmetrically fixedly installed at the bottom of the placement platform (2). A thermocouple (6) is also fixedly installed at the bottom of the placement platform (2).

3. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 2, characterized in that, A fixed seat (14) is fixedly installed at the center of the furnace body (1). The lower end of the fixed rod (21) is slidably installed at the center of the fixed seat (14). A screw (15) is also rotatably installed at the center of the fixed seat (14). The screw (15) is threadedly installed in the screw groove (22).

4. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 1, characterized in that, The heating component (3) includes a ring-shaped bracket (31), and a plurality of heating wires (32) are fixedly arranged on the inner side of the bracket (31), and the heating wires (32) are ring-shaped.

5. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 1, characterized in that, The air guide component (5) includes a fixed frame (51) fixedly installed inside the furnace body (1), a limit rod (52) is slidably installed on the fixed frame (51), and several baffles (53) are rotatably installed on the limit rod (52).

6. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 5, characterized in that, One end of the baffle (53) is symmetrically fixedly connected to a rotating shaft. The outer wall of the rotating shaft is fixedly connected with several limiting strips (531) in a ring array. The limiting rod (52) is provided with a rotating groove (521). The rotating shaft is rotatably disposed in the rotating groove (521). The limiting rod (52) is provided with several limiting grooves (522) in a ring array that communicate with the rotating groove (521). The limiting strips (531) are elastically engaged in the limiting grooves (522).

7. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 5, characterized in that, The air inlet pipe (41) is fixedly connected to a number of branch pipes (411) at one end, and the branch pipes (411) are respectively located between two adjacent baffles (53), and a thermal mass flow meter is fixedly installed inside the air inlet pipe (41).

8. The automatic alarm device for variable displacement in a ceramic copper-clad substrate sintering furnace according to claim 1, characterized in that, The output end of the warning light (12) is fixedly connected to the input end of the display screen (11).

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