CN213752161U

CN213752161U - Sintering mold for radio frequency insulator containing special-shaped inner conductor

Info

Publication number: CN213752161U
Application number: CN202022775429.1U
Authority: CN
Inventors: 杨世亮
Original assignee: Shanghai Kefa Electronic Products Co ltd
Current assignee: Shanghai Kefa Electronic Products Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-20
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a sintering mould for containing dysmorphism inner conductor radio frequency insulator, including inner conductor-glass sintering mould unit and product assembly sintering mould unit, inner conductor-glass sintering mould unit includes first mould bottom plate, has seted up inner conductor location chamber from bottom to top in proper order on this first mould bottom plate, the chamber is placed to the step briquetting, sealing glass location chamber and glass briquetting place the chamber, the top in inner conductor location chamber be equipped with the step constant head tank of step looks adaptation, the intracavity is placed to the step briquetting is equipped with the step briquetting, the intracavity is placed to the glass briquetting is equipped with the glass briquetting. Compared with the prior art, the utility model discloses earlier carry out the sintered forming to sealing glass and inner conductor alone, assemble and sintering with the casing again after selecting the subassembly that meets the requirements, can guarantee that the sealing glass surface in the sintering back casing meets the requirements, can also avoid sealing glass along inner conductor surface diffusion simultaneously, has guaranteed the leakproofness of product.

Description

Sintering mold for radio frequency insulator containing special-shaped inner conductor

Technical Field

The utility model belongs to the technical field of the radio frequency insulator processing, a sintering mould for containing special-shaped inner conductor radio frequency insulator is related to.

Background

Radio frequency insulators are of various types and generally include a housing, an inner conductor inserted in the housing, and a sealing glass disposed between the housing and the inner conductor for sealing and insulating. For some radio frequency insulators, the inner conductor is not a standard cylindrical shape, but is often shaped in a special shape, such as a step protruding outward from a portion of the side surface of the inner conductor.

At present, during sintering process of such radio frequency insulators, the housing, the inner conductor and the sealing glass are generally assembled together in a mold for sintering. Because the side surface of the inner conductor is partially protruded outwards by a circle of steps, in order to enable the step part to be installed in the die, the diameter of the inner conductor preformed hole of the die needs to be slightly larger than that of the steps, and therefore a gap of about 0.2mm is formed between the inner conductor preformed hole of the die and the cylindrical part of the inner conductor. This sintering method can have some problems, such as: the sealing glass surface in the sintered shell does not meet the requirement, and the gap between the inner conductor preformed hole of the die and the cylindrical part of the inner conductor can cause the sealing glass to diffuse along the surface of the inner conductor, so that the design requirement of the product can not be met, and hidden troubles are left for the sealing property and the insulating property of the product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sintering mould for containing special-shaped inner conductor radio frequency insulator carries out the sintered forming of sealing glass and inner conductor earlier alone, later sinters with the casing equipment again.

The purpose of the utility model can be realized through the following technical scheme:

a sintering mould for a radio frequency insulator containing a special-shaped inner conductor comprises a shell, the inner conductor inserted in the shell and sealing glass arranged between the shell and the inner conductor, the side surface of the inner conductor is provided with a step which protrudes outwards and is positioned below the sealing glass, the sintering mold comprises an inner conductor-glass sintering mold unit and a product final assembly sintering mold unit, the inner conductor-glass sintering mold unit comprises a first mold bottom plate, the first die bottom plate is sequentially provided with an inner conductor positioning cavity, a step pressing block placing cavity, a sealing glass positioning cavity and a glass pressing block placing cavity from bottom to top, the top in inner conductor location chamber be equipped with the step constant head tank of step looks adaptation, the step briquetting place the intracavity and be equipped with the step briquetting, the glass briquetting place the intracavity and be equipped with the glass briquetting. The inner conductor positioning cavity is used for positioning the lower part of the inner conductor. The step constant head tank is used for fixing a position the step. The step pressing block is used for pressing the top of the step. The sealing glass positioning cavity is used for positioning the sealing glass. The glass pressing block is used for pressing the sealing glass. The inner conductor-glass sintering mold unit is used for realizing sintering molding of the sealing glass and the inner conductor, and then the shell and the sintered inner conductor of the sealing glass are assembled and sintered by the product assembly sintering mold unit.

Furthermore, the inner conductor is cylindrical, and the step is arranged on the side surface of the inner conductor in a surrounding mode.

Further, the height of the sealing glass is smaller than that of the shell. A cavity is formed between the bottom surface of the sealing glass and the inner wall of the shell.

Furthermore, the bottom surface of the step pressing block is matched with the top surface of the step.

Preferably, the step pressing block can adopt a combination mode, and 2 identical half step pressing blocks are aligned and then spliced to form a whole circle.

Furthermore, the top surface of the step pressing block and the bottom surface of the glass pressing block are both planes. The glass pressing block is used as a balancing weight and is used for flattening the upper surface and the lower surface of the sealing glass together with the step pressing block.

Furthermore, the step pressing block and the glass pressing block are both provided with first through holes matched with the inner conductor.

Further, the product final assembly sintering mold unit comprises a second mold bottom plate, and a product placing cavity is formed in the second mold bottom plate.

Furthermore, a graphite flat plate is arranged at the bottom of the second die bottom plate.

Furthermore, a lower fixing block and an upper fixing block are respectively arranged on one of the product placing cavity and the other product placing cavity. The lower fixing block and the upper fixing block are used for fixing the product from the lower side and the upper side respectively.

Furthermore, a second through hole matched with the step is formed in the lower fixing block, a third through hole matched with the inner conductor is formed in the upper fixing block, and the inner diameter of the second through hole is larger than that of the third through hole.

The utility model discloses an application does:

1) the inner conductor is placed into an inner conductor positioning cavity of a first die bottom plate, then a step pressing block is placed, sealing glass is placed, then a glass pressing block is placed, sintering is carried out, the inner conductor of the sintered sealing glass is obtained, the inner conductor of the sintered sealing glass is inspected, components which do not meet requirements are removed, and the surfaces of the sealing glass of the components which are inspected to be qualified are cleaned;

2) and (3) assembling the second die bottom plate, the lower fixing block and the graphite flat plate, then loading the assembly into the shell, sintering the inner conductor of the sealing glass, loading the assembly into the upper fixing block, completing assembly, and then sintering.

Compared with the prior art, the utility model has the characteristics of it is following:

1) the sealing glass and the inner conductor are sintered and molded separately, and components meeting the requirements are selected and then assembled with the shell and sintered, so that the surface of the sealing glass in the shell meets the requirements after sintering, the sealing glass can be prevented from diffusing along the surface of the inner conductor, the sealing performance of the product is ensured, and the yield can be greatly improved to more than 95%;

2) the method is easy to operate, saves a large amount of labor, reduces the sintering pressure and reduces the cost.

Drawings

Fig. 1 is a schematic view of a front cross-sectional structure of the radio frequency insulator of the present invention;

FIG. 2 is a schematic sectional view of a first mold bottom plate of the present invention;

FIG. 3 is a schematic sectional view of the inner conductor-glass sintering mold unit according to the present invention;

FIG. 4 is a schematic view of the sectional structure of the middle step pressing block of the present invention;

FIG. 5 is a schematic view of the sectional structure of the glass block of the present invention;

FIG. 6 is a schematic sectional view of the second mold bottom plate of the present invention;

FIG. 7 is a schematic sectional view of the product assembly sintering mold unit according to the present invention;

fig. 8 is a schematic view of a front sectional structure of the middle and lower fixing blocks of the present invention;

fig. 9 is a schematic view of a front sectional structure of the upper fixing block of the present invention;

the notation in the figure is:

the device comprises a shell 1, a shell 2, an inner conductor 2, a sealing glass 3, a step 4, a first die bottom plate 5, an inner conductor positioning cavity 6, a step pressing block placing cavity 7, a glass pressing block placing cavity 8, a step positioning groove 9, a step pressing block 10, a glass pressing block 11, a sealing glass positioning cavity 12, a second die bottom plate 13, a product placing cavity 14, a lower fixing block 15, an upper fixing block 16, a first through hole 17, a second through hole 18, a third through hole 19 and a graphite flat plate 20.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example (b):

the radio frequency insulator shown in fig. 1 comprises a shell 1, an inner conductor 2 inserted in the shell 1, and a sealing glass 3 arranged between the shell 1 and the inner conductor 2, wherein the side surface of the inner conductor 2 is provided with a step 4 protruding outwards, and the step 4 is positioned below the sealing glass 3. The inner conductor 2 is cylindrical, and the step 4 is circumferentially provided on the side surface of the inner conductor 2. The height of the sealing glass 3 is less than that of the shell 1.

A sintering mold for a radio frequency insulator containing a special-shaped inner conductor comprises an inner conductor-glass sintering mold unit and a product assembly sintering mold unit, wherein the inner conductor-glass sintering mold unit comprises a first mold bottom plate 5. As shown in fig. 2, an inner conductor positioning cavity 6, a step pressing block placing cavity 7, a sealing glass positioning cavity 12 and a glass pressing block placing cavity 8 are sequentially formed in the first mold bottom plate 5 from bottom to top, and a step positioning groove 9 matched with the step 4 is formed in the top of the inner conductor positioning cavity 6. As shown in fig. 3, a step pressing block 10 is arranged in the step pressing block placing cavity 7, and a glass pressing block 11 is arranged in the glass pressing block placing cavity 8. The bottom surface of the step pressing block 10 is matched with the top surface of the step 4. The top surface of the step pressing block 10 and the bottom surface of the glass pressing block 11 are both flat surfaces. As shown in fig. 4 and 5, the step compact 10 and the glass compact 11 are both provided with a first through hole 17 adapted to the inner conductor 2.

The product final assembly sintering mold unit comprises a second mold bottom plate 13, as shown in fig. 6, a product placing cavity 14 is formed on the second mold bottom plate 13. As shown in fig. 7, the bottom of the second mold bottom plate 13 is provided with a graphite flat plate 20. A lower fixing block 15 and an upper fixing block 16 are respectively arranged on one lower part in the product placing cavity 14. As shown in fig. 8 and 9, the lower fixing block 15 is provided with a second through hole 18 adapted to the step 4, the upper fixing block 16 is provided with a third through hole 19 adapted to the inner conductor 2, and the inner diameter of the second through hole 18 is larger than that of the third through hole 19.

The application process of the sintering mold comprises the following steps:

1) the inner conductor 2 is placed into an inner conductor positioning cavity 6 of a first mold bottom plate 5, then a step pressing block 10 is placed, then sealing glass 3 is placed, then a glass pressing block 11 is placed, sintering is carried out, the inner conductor 2 of the sintered sealing glass 3 is obtained, the inner conductor 2 of the sintered sealing glass 3 is inspected, components which do not meet requirements are removed, and the surfaces of the sealing glass 3 of the components which are qualified in inspection are cleaned;

2) the second mold bottom plate 13, the lower fixing block 15 and the graphite flat plate 20 are assembled, then the assembly is carried out by loading the assembly into the shell 1 and sintering the inner conductor 2 of the sealing glass 3, and then the assembly is completed by loading the assembly into the upper fixing block 16, and then the sintering is carried out.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A sintering mold for a radio frequency insulator containing a special-shaped inner conductor comprises a shell (1), an inner conductor (2) inserted in the shell (1) and sealing glass (3) arranged between the shell (1) and the inner conductor (2), wherein the side surface of the inner conductor (2) is provided with a step (4) protruding outwards, the step (4) is positioned below the sealing glass (3), the sintering mold is characterized by comprising an inner conductor-glass sintering mold unit and a product assembly sintering mold unit, the inner conductor-glass sintering mold unit comprises a first mold bottom plate (5), an inner conductor positioning cavity (6), a step pressing block placing cavity (7), a sealing glass positioning cavity (12) and a glass placing cavity (8) are sequentially arranged on the first mold bottom plate (5) from bottom to top, the top of inner conductor location chamber (6) be equipped with step (4) looks adaptation step constant head tank (9), the step briquetting place and be equipped with step briquetting (10) in chamber (7), the glass briquetting place and be equipped with glass briquetting (11) in chamber (8).

2. The sintering mold for the radio frequency insulator with the special-shaped inner conductor as claimed in claim 1, characterized in that the inner conductor (2) is cylindrical, and the step (4) is arranged around the side surface of the inner conductor (2).

3. The sintering mold for the radio frequency insulator with the special-shaped inner conductor as claimed in claim 1, characterized in that the height of the sealing glass (3) is less than that of the shell (1).

4. The sintering mold for the radio frequency insulator with the special-shaped inner conductor as claimed in claim 1, characterized in that the bottom surface of the step pressing block (10) is matched with the top surface of the step (4).

5. The sintering mold for the radio frequency insulator with the special-shaped inner conductor as claimed in claim 1, wherein the top surface of the stepped compact (10) and the bottom surface of the glass compact (11) are both planar.

6. The sintering die for the radio frequency insulator with the special-shaped inner conductor is characterized in that the step pressing block (10) and the glass pressing block (11) are respectively provided with a first through hole (17) matched with the inner conductor (2).

7. The sintering mold for the radio frequency insulator with the special-shaped inner conductor according to claim 1, characterized in that the product assembly sintering mold unit comprises a second mold bottom plate (13), and a product placing cavity (14) is formed in the second mold bottom plate (13).

8. A sintering mold for a radio frequency insulator containing a special-shaped inner conductor according to claim 7, characterized in that the bottom of the second mold bottom plate (13) is provided with a graphite flat plate (20).

9. The sintering mold for the radio frequency insulator with the special-shaped inner conductor as claimed in claim 7, wherein a lower fixing block (15) and an upper fixing block (16) are respectively arranged in the product placing cavity (14) at one position and at the other position.

10. The sintering die for the radio frequency insulator with the special-shaped inner conductor according to claim 9, wherein a second through hole (18) matched with the step (4) is formed in the lower fixing block (15), a third through hole (19) matched with the inner conductor (2) is formed in the upper fixing block (16), and the inner diameter of the second through hole (18) is larger than that of the third through hole (19).