Mould for sealing glass and metal

Abstract

The utility model relates to the technical field of glass and metal sealing, and discloses a mold for glass and metal sealing, which is used for sealing a core column, a glass bead and a shell, the shell is sleeved on the glass bead, the core column penetrates through the glass bead, and the shell is sleeved on the glass bead. The mold for sealing the glass and the metal comprises a shell, an upper cover plate located at the upper end of the shell and a lower bottom plate located at the lower end of the shell, glass beads and the shell are both located in the shell, and the shell is connected between the upper cover plate and the lower bottom plate in an abutting mode; the edge of the upper cover plate is provided with a first step structure, and the upper cover plate is embedded in the upper end of the shell through the first step structure; a second step structure is arranged on the edge of the lower bottom plate, the lower bottom plate is embedded into the bottom of the shell through the second step structure, the lower bottom plate is located in the shell, and the bottom of the shell supports the lower bottom plate. According to the utility model, the upper and lower parts can be prevented from deviating when the mold is transferred, so that transfer operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to glass and metal sealing technical field, especially a kind of glass and metal sealing mould. BACKGROUND

[0002] Glass and metal sealing technology is the key process in the field of electronic packaging, connector and sensor manufacturing, mainly used to realize the air-tight sealing and electrically insulated connection between metal parts and glass body. This kind of sealing assembly is usually composed of a shell, a glass bead as a medium, and a metal wire as a core column. It is widely used in industry due to its excellent mechanical strength, corrosion resistance and high reliability.

[0003] The common glass and metal sealing mould currently includes upper and lower pressing blocks, a bottom plate and an outer mould. The assembly method is to fix the glass bead and the core column with the upper and lower pressing blocks with through holes, and then constrain the shell with the outer mould and place it on the bottom plate, or design the lower pressing block and the bottom plate as an integral structure to realize the sealing and forming of glass and metal after sintering.

[0004] However, the above-mentioned sealing mould has the following problems: during the mould transfer in the sintering process, the whole mould can only be transferred by the bottom plate. This structure is prone to relative deviation between the bottom plate and the upper mould due to the "head-heavy foot-light" shaking, which not only affects the operation stability, but also reduces the consistency and reliability of the sealing process. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is how to prevent the upper and lower parts from deviating during mould transfer to facilitate transfer operation.

[0006] In order to solve the above technical problem, the utility model provides a glass and metal sealing mould for sealing the core column, glass bead and shell. The shell is sleeved on the glass bead, and the core column penetrates the glass bead. The glass and metal sealing mould includes a shell body, an upper cover plate located at the upper end of the shell body, and a lower bottom plate located at the lower end of the shell body. The glass bead and the shell are located in the shell body, and the shell abuts between the upper cover plate and the lower bottom plate.

[0007] The edge of the upper cover plate is provided with a first step structure, and the upper cover plate is fitted into the upper end of the shell body through the first step structure.

[0008] The edge of the lower bottom plate is provided with a second step structure, and the lower bottom plate is fitted into the bottom of the shell body through the second step structure. The lower bottom plate is located in the shell body, and the bottom of the shell body supports the lower bottom plate.

[0009] Further, the bottom of the shell is provided with an ejection groove, and the second step structure is embedded with the edge of the ejection groove.

[0010] The ejection groove penetrates the bottom of the shell, and the lower bottom plate can be moved upward through the ejection groove, so that the core column, the glass bead and the shell are moved out of the shell upward.

[0011] Further, the upper cover plate is provided with a first hole position for the upper end of the core column to extend into, and the lower bottom plate is provided with a second hole position for the lower end of the core column to extend into.

[0012] Further, the first hole position is a through hole, and the second hole position is a blind hole.

[0013] Further, the glass bead and the shell have the same height.

[0014] Further, the shell, the upper cover plate and the lower bottom plate are all made of graphite material.

[0015] The technical scheme has the beneficial effects that: the first step structure is arranged at the edge of the upper cover plate and embedded in the upper end of the shell, and the second step structure is arranged at the edge of the lower bottom plate and embedded in the bottom of the shell and supported by the shell, so that a stable assembly structure is formed between the upper cover plate, the lower bottom plate and the shell; the shell is clamped by a clamp during the mold transfer process, which can effectively limit the relative displacement between the upper cover plate, the lower bottom plate and the shell, completely solve the shaking and deviation problem caused by "head heavy and foot light", significantly improve the overall stability and safety during the transfer operation, and thus ensure the consistency and reliability of the sealing process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a sectional view of the mold for sealing glass and metal provided by the embodiment of the utility model;

[0017] Fig. 2 is a sectional view of the shell provided by the embodiment of the utility model;

[0018] Fig. 3 is a sectional view of the lower bottom plate provided by the embodiment of the utility model.

[0019] Wherein, 1 - core column, 2 - glass bead, 3 - shell, 4 - shell, 41 - ejection groove, 5 - lower bottom plate, 51 - second step structure, 52 - second hole position, 6 - upper cover plate, 61 - first step structure, 62 - first hole position. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0021] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the present application are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] As shown in Figs. 1 to 3 The glass and metal sealing mold provided by the present application includes a shell 4, an upper cover plate 6 located at the upper end of the shell 4, and a lower bottom plate 5 located at the lower end of the shell 4. The glass and metal sealing mold is used for sealing a core column 1, a glass bead 2 and an outer shell 3. The outer shell 3 is sleeved on the glass bead 2, and the core column 1 penetrates through the glass bead 2. The glass bead 2 and the outer shell 3 to be sealed are accommodated in the shell 4, and the upper and lower surfaces of the outer shell 3 abut against the upper cover plate 6 and the lower bottom plate 5 respectively.

[0024] The edge of the upper cover plate 6 is processed with a first step structure 61, through which the upper cover plate 6 can be precisely fitted and mounted at the upper end opening of the shell 4; the edge of the lower bottom plate 5 is processed with a second step structure 51, through which the lower bottom plate 5 can be stably fitted on the inner side of the bottom of the shell 4, and the lower bottom plate 5 is supported by the bottom of the shell 4.

[0025] The scheme makes the upper cover plate 6, the shell 4 and the lower bottom plate 5 interlock through corresponding step structures, forming a tightly connected whole, greatly enhancing the structural stability of the mold. In the transfer operation, the operator only needs to clamp the shell 4 part through a tool, and the whole mold can be stably transferred, effectively avoiding the sealing quality problems caused by the misalignment or offset between parts, significantly improving the overall stability and safety during the transfer operation, thereby ensuring the consistency and reliability of the sealing process.

[0026] To further solve the problem of taking out the assembly after sealing, and avoid shaking during the taking process, the embodiment opens a through ejection groove 41 at the bottom of the shell 4.

[0027] Among them, the second step structure 51 of the lower bottom plate 5 is exactly matched with the edge of the ejection groove 41. When the sealing process is completed and the assembly needs to be taken out, a ejector rod can be used to extend into the ejection groove 41 from below and apply a pushing force to the lower bottom plate 5. The lower bottom plate 5 is lifted upwards, thereby stably lifting the shell 3, the bead 2 and the stem 1 on it upwards, so that it is separated from the shell 4. This ejection taking method provides a vertical linear motion, completely avoiding the lateral force and shaking generated when using traditional tools to clamp, and maximally protecting the integrity of the sealed assembly and the reliability of the sealing interface.

[0028] Specifically, the existing technology takes out the sealed assembly by clamping the stem 1 and applying an upward force to take it. The upward ejection of the lower bottom plate 5 in the embodiment can reduce the friction between the shell 3 and the inside of the shell 4 caused by the left and right shaking of the stem 1 when taking the sealed assembly, making the sealed assembly more secure.

[0029] To ensure that the slender stem 1 always maintains accurate vertical positioning during the sealing process and prevents it from tilting and affecting the sealing quality, the embodiment opens a first hole position 62 on the upper cover plate 6 for the upper end of the stem 1 to extend into, and a second hole position 52 on the lower bottom plate 5 for the lower end of the stem 1 to extend into. These two hole positions, after assembly, together with the cavity inside the shell 4, form a precise positioning system. The upper end of the stem 1 extends into the first hole position 62, and the lower end extends into the second hole position 52, thereby being reliably limited on the pre-set central axis. This positioning method from both ends ensures the concentricity between the stem 1 and the bead 2 and the shell 3, providing a crucial guarantee for forming a uniform and airtight glass sealing interface.

[0030] Specifically, the first hole position 62 on the upper cover plate 6 is designed as a through hole, and the second hole position 52 on the lower bottom plate 5 is designed as a blind hole. The through hole design allows the upper end of the core column 1 to extend upward as necessary, adapting to the length of the core column 1. The blind hole of the lower bottom plate 5 provides a determined support surface for the lower end of the core column 1, effectively preventing the core column 1 from sliding or loosening vertically, ensuring its fixation in the vertical direction. The combination of the through hole and the blind hole achieves precise positioning while also considering the convenience of assembly and the adaptability of the process.

[0031] In this embodiment, the height of the glass bead 2 and the shell 3 is the same, so that the upper cover plate 6 and the lower bottom plate 5 respectively press the upper and lower surfaces of the glass bead 2 flat.

[0032] The sealing process needs to be carried out in a high-temperature environment, and has very high requirements for the heat resistance, stability and demolding property of the mold material. The shell 4, the upper cover plate 6 and the lower bottom plate 5 of the embodiment are preferably made of graphite material. Graphite material has very high high-temperature resistance and can withstand the sintering temperature required for glass sealing without deformation or degradation. Its self-lubricating property makes the sealing assembly easy to demold after sintering. At the same time, graphite is not infiltrated by molten glass and has stable chemical properties, and will not react with the sealing material to contaminate the product. Using graphite material to manufacture the entire mold fundamentally ensures the durability, reliability and process consistency of the mold under harsh process conditions.

[0033] Working process: during installation, the lower bottom plate 5 is installed into the shell 4, then the shell 3 is installed, then the glass bead 2 is installed, then the core column 1 is installed and inserted downward into the second hole position 52, then the upper cover plate 6 is placed, and after the assembly is completed, the mold is sintered as a whole; after sintering is completed, the upper cover plate 6 is removed, then the lower bottom plate 5 is pushed out from bottom to top, and at this time the lower bottom plate 5 is removed to obtain the sealing assembly.

[0034] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection range of the present application.

Claims

1. A mold for glass-to-metal sealing for sealing a stem, a bulb, and a shell, the shell being fitted to the bulb, the stem penetrating the bulb, characterized in that, The mold for sealing glass and metal comprises a shell, an upper cover plate at the upper end of the shell, and a lower bottom plate at the lower end of the shell, the glass bead and the shell are located in the shell, and the shell abuts between the upper cover plate and the lower bottom plate; An edge of the upper cover plate is provided with a first step structure, and the upper cover plate is fitted into the upper end of the shell through the first step structure; An edge of the lower bottom plate is provided with a second step structure, and the lower bottom plate is fitted into the bottom of the shell through the second step structure, the lower bottom plate is located in the shell, and the bottom of the shell supports the lower bottom plate.

2. The mold for glass-to-metal seal according to claim 1, wherein The bottom of the shell is provided with an ejection groove, and the second step structure is fitted into the edge of the ejection groove; The ejection groove penetrates the bottom of the shell, and the lower bottom plate can be moved upward through the ejection groove, so that the core column, the glass bead and the shell are moved upward out of the shell.

3. The mold for glass-to-metal seal according to claim 1, wherein The upper cover plate is provided with a first hole position for the upper end of the core column to extend into, and the lower bottom plate is provided with a second hole position for the lower end of the core column to extend into.

4. The mold for glass-to-metal seal according to claim 3, wherein The first hole position is a through hole, and the second hole position is a blind hole.

5. The mold for glass-to-metal seal according to claim 1, wherein The height of the glass bead and the shell is the same.

6. The mold for glass-to-metal seal according to claim 1, wherein The shell, the upper cover plate and the lower bottom plate are all made of graphite material.

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