Zinc oxide voltage-sensitive ceramic resin encapsulation fixing method and fixing hanger

Abstract

The invention discloses a zinc oxide voltage-sensitive ceramic resin encapsulation fixing method and a fixing hanger. According to the method, the center line in the length direction of the fixed hanger is taken as a starting point, and ceramic fixing clamps on which rows of zinc oxide voltage-sensitive ceramics are fixed extend towards the two ends in the length direction of the fixed hanger in an arithmetic progression decreasing mode respectively. The device comprises a square frame, a plurality of limiting holes are formed in the two sides of the square frame in the length direction, and a ceramic fixing clamp is arranged between the limiting holes in the two sides. The limiting holes in the same side take the center line in the length direction of the square frame as the starting point, and the limiting holes in the two sides extend towards the two ends in the length direction of the square frame in an arithmetic progression decreasing mode. The method is easy to operate, uniform diffusion of the resin powder can be achieved, sealing omission and reworking are reduced, and the product quality and the processing efficiency can be improved; the fixing hanging frame is simple in structure, reasonable in design, high in practicability, remarkable in effect and suitable for wide application and popularization.

Description

Technical Field

[0001] The present invention relates to a method and a device for processing zinc oxide varistor ceramics, and in particular to a resin encapsulation and fixing method and a fixing rack for zinc oxide varistor ceramics. Background Art

[0002] Zinc oxide varistor ceramic is a thin sheet of functional ceramic. After going through many processes such as pressing, sintering, and pin installation, its surface needs to be encapsulated with resin material.

[0003] At present, the resin encapsulation method of zinc oxide varistor ceramics is generally to preheat the ceramic sheet and immerse it in a resin powder pool. The resin powder is melted by the surface temperature of the ceramic sheet and a layer of resin material is attached to the surface. Then, high-temperature heating and curing are performed to form a uniform resin layer on the surface of the ceramic sheet, completing the encapsulation process.

[0004] Throughout the encapsulation process, a dedicated mounting rack is required. Only after the ceramic sheets are secured to the mounting rack can they be fed into the heating device and resin powder tank for heating and coating. The mounting rack typically consists of a ceramic clamp that holds the sheets and a square frame that holds the clamps. Several clamps are typically placed in a row on one of the square frames, and each clamp holds multiple sheets, improving processing efficiency.

[0005] However, the current fixed rack has no special requirements for the arrangement and placement of the ceramic fixing clips. Generally, they are arranged in an equidistant manner, so that the spacing between the ceramic pieces in the rows is consistent or close. When the ceramic pieces placed in this way are immersed in the resin powder pool, the gaps between the center area and the edge area are consistent, and the diffusion space in the edge area is larger than the diffusion space in the middle area. Therefore, the resin powder in the center area will accumulate upward under the pressure of the ceramic pieces, while the resin powder in the edge area will diffuse to the surroundings, so that the resin powder in the resin powder pool will form a hill shape, as shown in the attached manual. Figure 8 As shown in the figure, the resin powder in the middle area has been immersed above the pins, while the resin powder in the edge area has not yet completely immersed the ceramic sheet body, resulting in some ceramic sheets being leaky and requiring rework, resulting in defects such as reduced product quality and low processing efficiency.

[0006] To this end, we combined practical production experience and theoretical research to study and improve the zinc oxide varistor ceramic resin encapsulation fixation method and fixation bracket to overcome the aforementioned defects. Summary of the Invention

[0007] To address the aforementioned technical issues, the present invention provides a method and mounting bracket for resin encapsulation of zinc oxide varistor ceramics. The method is easy to operate, achieves uniform diffusion of resin powder, reduces rework for leaky seals, and improves product quality and processing efficiency. Furthermore, the mounting bracket features a simple structure, rational design, strong practicality, and significant effectiveness, making it suitable for widespread application.

[0008] One of the technical solutions of the present invention:

[0009] A method for resin encapsulation and fixing of zinc oxide varistor ceramics is provided. Starting from the center line of the length direction of a fixed rack, ceramic fixing clips fixing rows of zinc oxide varistor ceramics are extended to both ends of the length direction of the fixed rack in an arithmetic progression.

[0010] Preferably, in the aforementioned zinc oxide varistor ceramic resin encapsulation and fixing method, the difference of the arithmetic progression is 4-6 mm.

[0011] The method of this scheme can be operated using a traditional fixed hanger. The only difference is that the arrangement of the ceramic fixing clips is changed from the original equidistant arrangement to: taking the center line of the fixed hanger in the length direction as the starting point, the ceramic fixing clips that fix rows of zinc oxide varistor ceramics are extended to both ends of the length direction of the fixed hanger in an arithmetic progression. The method of the present invention can balance the diffusion space areas of the resin powder in the central area and the edge area, so that the surface of the resin powder in the entire resin powder pool is closer to a horizontal shape, the immersion depth of the ceramic sheet is closer, the encapsulation consistency is higher, and the risk of leakage is lower, thereby improving product quality and processing efficiency.

[0012] The second technical solution of the present invention:

[0013] A zinc oxide pressure-sensitive ceramic resin-encapsulated fixed hanger is provided, comprising a square frame, a plurality of limiting holes being provided on both sides of the square frame in the length direction, and a ceramic fixing clip being provided between the limiting holes on both sides; the limiting holes on the same side take the center line of the square frame in the length direction as the starting point, and the limiting holes on both sides extend and distribute toward both ends of the square frame in the length direction in an arithmetic progression decreasing manner.

[0014] The fixed hanger of this solution can conveniently implement the above-mentioned method, improve the packaging consistency, reduce the risk of leakage, and ensure product quality and processing efficiency. Its overall structure is simple, the design is reasonable, and it has strong practicality and is suitable for wide promotion and application.

[0015] Preferably, the aforementioned zinc oxide pressure-sensitive ceramic resin-encapsulated fixed bracket has a difference of 4-6 mm in the arithmetic progression.

[0016] Preferably, the aforementioned zinc oxide pressure-sensitive ceramic resin-encapsulated fixed bracket has a hanging ear at each end of the length direction of the square frame.

[0017] Preferably, the aforementioned zinc oxide varistor ceramic resin-encapsulated fixed bracket, the ceramic fixing clamp includes an inverted convex base plate, both ends of the inverted convex base plate in the length direction are provided with limiting ear plates perpendicular to the plane of the inverted convex base plate, and the lower end of the inverted convex base plate is provided with a clamping plate for fixing the zinc oxide varistor ceramic.

[0018] Preferably, the aforementioned zinc oxide pressure-sensitive ceramic resin-encapsulated fixed bracket has a pressure plate at each end of the square frame in the width direction, which is pressed on the upper side of the ceramic fixing clamp.

[0019] Preferably, the aforementioned zinc oxide pressure-sensitive ceramic resin-encapsulated fixed bracket has a pressure plate with a fishhook-shaped cross section, the lower side of which is connected to the side of the square frame via a rotating shaft, and the pressure plate and the square frame are connected via a tension spring.

[0020] Beneficial effects of the present invention:

[0021] 1. The method of the present invention can balance the diffusion space of the resin powder in the central area and the edge area, so that the surface of the resin powder in the entire resin powder pool is closer to a horizontal shape, the immersion depth of the ceramic sheet is closer, the encapsulation consistency is higher, and the risk of leakage is lower, thereby improving product quality and processing efficiency.

[0022] 2. The fixed hanger of the present invention can conveniently implement the aforementioned method, improve packaging consistency, reduce the risk of leaking, and ensure product quality and processing efficiency. Its overall structure is simple, the design is reasonable, and it has strong practicality and is suitable for widespread promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attachment Figure 1 It is a schematic diagram of the overall structure of the fixed rack of the present invention;

[0024] Attachment Figure 2 This is a schematic diagram of the square frame structure of the fixed rack of the present invention;

[0025] Attachment Figure 3 For attachment Figure 2 It is a top view;

[0026] Attachment Figure 4 This is a cross-sectional view of the fixed rack of the present invention when the ceramic piece is suspended;

[0027] Attachment Figure 5 A longitudinal sectional view of the fixed rack of the present invention when the ceramic piece is suspended;

[0028] Attachment Figure 6 It is a schematic structural diagram of the ceramic fixing clip of the present invention;

[0029] Attachment Figure 7 This is a longitudinal cross-sectional view of the resin powder pool when the fixing bracket of the present invention fixes the ceramic sheet and is immersed in the resin powder pool;

[0030] Attachment Figure 8 A longitudinal cross-sectional view of the resin powder pool when a traditional fixing rack is used to fix the ceramic sheet and immerse it in the resin powder pool.

[0031] Explanation of the reference numerals: 1-square frame, 2-limiting hole, 3-ceramic fixing clip, 31-inverted convex bottom plate, 32-limiting ear plate, 33-clamping plate, 4-hanging ear, 5-pressure plate, 6-rotating shaft, 7-tension spring, 8-zinc oxide pressure-sensitive ceramic sheet. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the examples, but they are not intended to limit the present invention.

[0033] Embodiment 1 of the present invention

[0034] A method for resin encapsulation and fixing of zinc oxide varistor ceramics, starting from the center line of the length direction of a fixed rack, and extending ceramic fixing clips fixing rows of zinc oxide varistor ceramics to both ends of the length direction of the fixed rack in an arithmetic progression.

[0035] In a preferred embodiment, the difference of the arithmetic progression is 4-6 mm, preferably 5 mm.

[0036] The method of this embodiment can be operated using a conventional fixed hanger, or it can be operated using the fixed hanger of the second embodiment of the present invention. Before placing the ceramic fixing clip, first wrap the protective tape around the pins of the ceramic piece in a conventional manner, then use the pins as fixed points to evenly fix the zinc oxide pressure-sensitive ceramic pieces on the ceramic fixing clips, then place a ceramic fixing clip with a zinc oxide pressure-sensitive ceramic piece fixed on the center line of the length direction of the fixing hanger, and then use this as the starting point, and place other ceramic fixing clips with zinc oxide pressure-sensitive ceramic pieces fixed on both sides in an arithmetic progression in decreasing order, the specific intervals can be set to 45mm-40mm-35mm-30mm-25mm, then fix all the ceramic fixing clips to prevent them from shifting, and then put them into the heating device and resin powder pool for powdering. When they are inserted into the resin powder pool, the longitudinal shape of the resin powder in the resin powder pool is as shown in the attached figure. Figure 7 As shown, it is nearly horizontal and all the ceramic pieces are immersed in the resin powder.

[0037] Embodiment 2 of the present invention

[0038] A zinc oxide pressure-sensitive ceramic resin encapsulated fixed rack, as shown in the attached Figure 1-6As shown, it includes a square frame 1, and an inwardly extending platform is provided on the inner side of the square frame 1 in the width direction, and a plurality of limiting holes 2 are provided on both sides of the length direction of the square frame 1, that is: the limiting holes 2 are provided on the aforementioned platform and close to the inner edge of the platform, and are open groove-shaped. A ceramic fixing clip 3 is provided between the limiting holes 2 on both sides, and the ceramic fixing clip 3 is in the shape of a long strip, and both ends can be clamped in the limiting holes 2; the limiting holes 2 on the same side take the center line of the length direction of the square frame 1 as the starting point, and the limiting holes 2 on both sides extend and distribute in an arithmetic progression to the two ends of the length direction of the square frame 1 in a decreasing manner.

[0039] The spacing between the limiting holes 2 of this embodiment decreases from the center toward the sides, and the specific spacing can be set to, for example, 45mm-40mm-35mm-30mm-25mm. When encapsulating the zinc oxide varistor ceramic sheet 8, the above-mentioned method can be used to obtain a product with good consistency, few leaks, and reliable quality, and the processing efficiency can be greatly improved.

[0040] Further implementation examples are attached Figure 1-6 As shown, the difference of the arithmetic progression is 4-6 mm, and the specific difference in this embodiment is 5 mm.

[0041] Further implementation examples are attached Figure 1-6 As shown, the two ends of the length direction of the square frame 1 are each provided with a hanging ear 4. The hanging ear 4 in this embodiment is used to fix the fixed hanger on the heating device and the motion mechanism in the resin powder pool.

[0042] Further implementation examples are attached Figure 1-6 As shown, the ceramic fixing clamp 3 includes an inverted convex base plate 31, and the two ends of the inverted convex base plate 31 in the longitudinal direction are provided with limiting ear plates 32 perpendicular to the plane of the inverted convex base plate 31, and the lower end of the inverted convex base plate 31 is provided with a clamping plate 33 for fixing the zinc oxide varistor ceramic. The clamping plate 33 and the convex base plate 31 of this embodiment are fixed by screws. When clamping the zinc oxide varistor ceramic sheet 8, the corresponding screws are first unscrewed to open the clamping plate 33, and then the pins of the zinc oxide varistor ceramic sheet 8 are inserted between the clamping plate 33 and the convex base plate 31. After tightening the screws, the zinc oxide varistor ceramic sheet 8 can be fixed in a row on the ceramic fixing clamp 3; and when the ceramic fixing clamp 3 is placed on the square frame 1, the lower sides of the two ends of the inverted convex base plate 31 are inserted into the limiting holes 2. Under the action of the limiting ear plates 32 at a slightly higher position, the ceramic fixing clamp 3 is kept fixed and placed on the square frame 1.

[0043] Further implementation examples are attached Figure 1-6 As shown, a pressing plate 5 is provided at each end of the width direction of the square frame 1 to press on the upper side of the ceramic fixing clamp 3. The pressing plate 5 is used to fix the ceramic fixing clamp 3 to prevent it from shifting and shaking.

[0044] Further implementation examples are attached Figure 1-6 As shown, the cross section of the pressing plate 5 is fishhook-shaped, and its lower side is connected to the side surface of the square frame 1 via a rotating shaft 6 , and the pressing plate 5 and the square frame 1 are connected via a tension spring 7 .

[0045] When in use, the pressure plate 5 of this embodiment relies on the tension spring 7 to maintain tension and compress the ceramic fixing clamp 3. Initially, the pressure plates 5 on both sides are flipped outward, and the ceramic fixing clamps 3 are sequentially inserted into the limiting holes 2 on both sides. After insertion, the pressure plates 5 are flipped inward. The tension spring 7 maintains the pressure plate 5 in a fixed position, and the inner vertex of the pressure plate 5 is kept in contact with the top surface of the ceramic fixing clamp 3.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A method for encapsulating and fixing zinc oxide varistor ceramics with resin, characterized in that: Starting from the center line of the length direction of the fixed rack, the ceramic fixing clips fixing rows of zinc oxide varistor ceramics are extended to both ends of the length direction of the fixed rack in an arithmetic progression decreasing manner.

2. The method for resin encapsulation and fixing of zinc oxide varistor ceramics according to claim 1, characterized in that: The difference of the arithmetic progression is 4-6 mm.

3. A zinc oxide pressure-sensitive ceramic resin-encapsulated fixed rack, characterized by: The invention comprises a square frame (1), wherein a plurality of limiting holes (2) are provided on both sides of the length direction of the square frame (1), and a ceramic fixing clamp (3) is provided between the limiting holes (2) on both sides; the limiting holes (2) on the same side take the center line of the length direction of the square frame (1) as the starting point, and the limiting holes (2) on both sides extend and distribute toward both ends of the length direction of the square frame (1) in an arithmetic progression decreasing manner.

4. The zinc oxide pressure-sensitive ceramic resin-encapsulated fixing bracket according to claim 3, characterized in that: The difference of the arithmetic progression is 4-6 mm.

5. The zinc oxide pressure-sensitive ceramic resin-encapsulated fixing bracket according to claim 3, characterized in that: A hanging ear (4) is provided at each end of the length direction of the square frame (1).

6. The zinc oxide pressure-sensitive ceramic resin-encapsulated fixing bracket according to claim 3, characterized in that: The ceramic fixing clamp (3) comprises an inverted convex bottom plate (31), both ends of the inverted convex bottom plate (31) in the longitudinal direction of which are provided with limiting ear plates (32) perpendicular to the plane of the inverted convex bottom plate (31), and a clamping plate (33) for fixing the zinc oxide pressure-sensitive ceramic is provided at the lower end of the inverted convex bottom plate (31).

7. The zinc oxide pressure-sensitive ceramic resin-encapsulated fixing bracket according to claim 3, characterized in that: A pressing plate (5) is provided at each of the two ends of the square frame (1) in the width direction and is pressed on the upper side of the ceramic fixing clamp (3).

8. The zinc oxide pressure-sensitive ceramic resin-encapsulated fixing bracket according to claim 7, characterized in that: The cross section of the pressing plate (5) is in the shape of a fishhook, and its lower side is connected to the side surface of the square frame (1) via a rotating shaft (6). The pressing plate (5) and the square frame (1) are connected via a tension spring (7).

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