Special-shaped glass tube manufacturing mold

Abstract

The utility model discloses a special-shaped glass tube manufacturing mold, which relates to the field of glass tube manufacturing and comprises a fixed mold, a special-shaped outer mold is arranged in the fixed mold, a special-shaped inner mold is coaxially arranged in the special-shaped outer mold, an extrusion mold is arranged at the top of the special-shaped outer mold, and the extrusion mold is arranged at the top of the special-shaped inner mold in a penetrating manner; the special-shaped outer mold, the special-shaped inner mold and the extrusion mold define a special-shaped forming cavity; according to the special-shaped glass tube manufacturing mold, the special-shaped glass tube can be manufactured, and the sealing requirement of a special-shaped device is met, so that the problems possibly occurring when a plurality of independent straight tubes are used for sealing are avoided, and the quality and the performance of electronic products are improved.

Description

Technical Field

[0001] The utility model relates to the field of glass tube manufacturing, in particular to a mold for manufacturing special-shaped glass tubes. Background Art

[0002] In the manufacturing industry, especially for electronic products working in high temperature environments, glass-to-metal sealing technology has become increasingly important due to its excellent strength and stability. This seal usually involves three parts: the housing, the lead, and the glass tube. In this structure, the glass tube is located between the housing and the lead, and the two are bonded by melting to provide sealing performance, ensure connection strength, and maintain insulation.

[0003] Nevertheless, current standard seal designs have limitations. They are usually composed of straight leads and housings with straight through holes, using glass tubes with vertical inner diameters for sealing. For special-shaped devices such as L-shaped, Y-shaped or X-shaped, the current practice is to use multiple individual straight tubes for sealing. This method is prone to bubbles or cracks at the connection points of the straight tubes, which can weaken the structural strength and electrical insulation performance of the product.

[0004] The traditional glass tube manufacturing process involves filling glass powder into a mold and then forming a glass blank through extrusion. After appropriate heat treatment, these blanks will undergo debinding and vitrification processes and eventually transform into sealed glass tubes. However, this method is mainly suitable for manufacturing sealed glass tubes for standard straight-shaped devices, but not for the sealing needs of special-shaped devices.

[0005] Therefore, in order to meet the sealing requirements of special-shaped devices, it is necessary to develop new glass tube manufacturing molds to improve the overall performance and reliability of the seals. Utility Model Content

[0006] The utility model aims to provide a special-shaped glass tube manufacturing mold, which can manufacture special-shaped glass tubes to meet the sealing requirements of special-shaped devices, thereby avoiding the problems that may occur when using multiple separate straight tubes for sealing, thereby improving the quality and performance of electronic products.

[0007] The above-mentioned optimized structure of the utility model is realized by the following technical scheme: a mold for making a special-shaped glass tube, comprising a fixed mold, a special-shaped external mold is arranged inside the fixed mold, a special-shaped internal mold is coaxially arranged inside the special-shaped external mold, an extrusion mold is arranged on the top of the special-shaped external mold, and the extrusion mold penetrates the top of the special-shaped internal mold;

[0008] The special-shaped external mold, the special-shaped internal mold and the extrusion mold are arranged to form a special-shaped molding cavity.

[0009] In some embodiments, at least two exhaust holes are provided on the special-shaped external mold, the top of the exhaust hole is connected to the outside, and the bottom of the exhaust hole is connected to the special-shaped molding cavity.

[0010] In some embodiments, the fixed mold is a square block, the fixed mold is provided with a fixed groove, the fixed groove is provided with the special-shaped external mold, and the size of the fixed groove is adapted to the special-shaped external mold.

[0011] In some embodiments, the cross-section of the special-shaped external mold is an inverted Y shape, including two symmetrical fixing parts, the two fixing parts are arranged in the fixed mold, an extrusion part is connected between the two fixing parts, the extrusion part is penetrated by a powder filling hole, and the extrusion mold is coaxially arranged in the powder filling hole.

[0012] In some embodiments, the special-shaped internal mold includes two fixing rods, which coaxially penetrate the fixing part, and also includes an extrusion rod, which coaxially penetrates the extrusion mold, and the tops of the two fixing rods are detachably connected to the bottoms of the extrusion rods.

[0013] In some embodiments, the two fixing rods and the extrusion rod are connected by a mortise and tenon structure.

[0014] In some embodiments, a diameter of an end of the fixing rod away from the extrusion rod is larger than a diameter of an end of the fixing rod close to the extrusion rod.

[0015] In some embodiments, the fixed mold, the special-shaped external mold, the special-shaped internal mold, and the extrusion mold are all made of graphite.

[0016] In summary, the utility model has the following beneficial effects:

[0017] The special-shaped glass tube manufacturing mold forms a special-shaped molding cavity through a special-shaped external mold, a special-shaped internal mold and an extrusion mold, so that a special-shaped glass tube can be manufactured. The special-shaped glass tube is suitable for sealing special-shaped devices, avoiding the problems that may occur when using multiple separate straight tubes for sealing, thereby improving the quality and performance of electronic products; at the same time, glass raw powder can be directly used to fill the special-shaped molding cavity and then sintered, which simplifies the production process and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a side view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model along the AA line;

[0021] Figure 4 This is a structural diagram of the special-shaped external mold of the utility model.

[0022] In the figure: 1. fixed mold; 11. fixed groove; 2. special-shaped external mold; 21. exhaust hole; 22. fixed part; 23. extrusion part; 24. powder filling hole; 3. special-shaped internal mold; 31. fixed rod; 32. extrusion rod; 4. extrusion mold; 5. special-shaped molding cavity. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] refer to Figure 1-4 A special-shaped glass tube manufacturing mold includes a fixed mold 1, a special-shaped external mold 2, a special-shaped internal mold 3 and an extrusion mold 4. The fixed mold 1, the special-shaped external mold 2, the special-shaped internal mold 3 and the extrusion mold 4 are all made of graphite; graphite can withstand high temperatures and does not react with glass powder, thereby ensuring the purity of the glass tube and the accuracy of the shape.

[0025] A special-shaped external mold 2 is arranged inside the fixed mold 1. The special-shaped external mold 2 can be formed by splicing two half molds, which is convenient for demoulding and taking out the glass tube after forming; a pluggable convex ring and a groove ring are arranged between the two half molds to facilitate positioning during splicing.

[0026] A special-shaped internal mold 3 is coaxially arranged inside the special-shaped external mold 2, an extrusion mold 4 is arranged on the top of the special-shaped external mold 2, and the extrusion mold 4 passes through the top of the special-shaped internal mold 3; the special-shaped external mold 2, the special-shaped internal mold 3 and the extrusion mold 4 are arranged to form a special-shaped molding cavity 5, and the glass powder is filled into the special-shaped molding cavity 5 and then sintered to produce a special-shaped glass tube, which meets the sealing requirements of special-shaped devices and avoids the problems that may occur when using multiple separate straight tubes for sealing, thereby improving the quality and performance of electronic products; and simplifying the production process and reducing costs.

[0027] In some embodiments, at least two exhaust holes 21 are provided on the special-shaped external mold 2. The top of the exhaust hole 21 is connected to the outside world, and the bottom is connected to the special-shaped molding cavity 5. Gas can be discharged during the production process of the special-shaped glass tube to ensure that there are no bubbles inside the glass tube and improve product quality.

[0028] In some embodiments, the fixed mold 1 is a square block, and the fixed mold 1 is provided with a fixing groove 11, and a special-shaped external mold 2 is provided in the fixing groove 11. The size of the fixing groove 11 is adapted to the special-shaped external mold 2, and the special-shaped external mold 2 can be fixed in the fixing groove 11 to prevent the movement of the special-shaped external mold 2, while ensuring that it will not be dislocated or deformed during the high temperature process.

[0029] In some embodiments, the cross-section of the special-shaped external mold 2 may be an inverted Y shape, including two symmetrical fixing parts 22, the fixing parts 22 may be a cylinder with a circular groove, and a through hole is provided at the center of the bottom of the cylinder; the two fixing parts 22 are arranged in the fixed mold 1, and an extrusion part 23 is connected between the two fixing parts 22, the extrusion part 23 may be a circular ring, and a powder filling hole 24 is penetrated through the extrusion part 23, and glass powder can be added to the special-shaped molding cavity 5 through the powder filling hole 24; an extrusion mold 4 is coaxially provided in the powder filling hole 24, and the extrusion mold 4 can protrude from the special-shaped external mold 2; the extrusion mold 4 may be a hollow cylinder, and an extrusion rod 32 is coaxially penetrated through the extrusion mold 4, and the special-shaped internal mold The cross section of 3 is also an inverted Y-shape that matches the special-shaped external mold 2. The special-shaped internal mold 3 includes two fixing rods 31. The fixing rods 31 coaxially penetrate the fixing portion 22. The tops of the two fixing rods 31 and the bottoms of the extrusion rods 32 can be connected by a mortise and tenon structure. This is a prior art and will not be described in detail here. The mortise and tenon structure can realize a detachable connection between the two fixing rods 31 and the extrusion rod 32, and is easy to disassemble. It also has a certain connection strength to avoid insufficient connection strength. During the liquefaction and flow of the glass powder, the fixing rods 31 and the extrusion rods 32 are subjected to force, and the fixing rods 31 and the extrusion rods 32 are separated from each other, thereby affecting the forming of the special-shaped glass tube.

[0030] In some embodiments, the diameter of the end of the fixing rod 31 away from the extrusion rod 32 is larger than the diameter of the end of the fixing rod 31 close to the extrusion rod 32 , which facilitates the installation and removal of the special-shaped internal mold 3 on the special-shaped external mold 2 .

[0031] In some embodiments, the through hole may be a conical hole, and the fixing portion 22 and the through hole of the fixing portion 22 may be interference fit, so that a conical seal is formed between the fixing rod 31 and the fixing portion 22 to prevent the glass powder from flowing out after liquefaction, thereby affecting the quality of the glass tube.

[0032] The specific working principle is as follows:

[0033] The size, shape and required glass powder weight of the fixed mold 1, the special-shaped external mold 2, the special-shaped internal mold 3 and the extrusion mold 4 are designed according to the product sealing requirements; the two fixing rods 31 are connected with the extrusion rod 32 to assemble the special-shaped internal mold 3, and fixed on a half mold of the special-shaped external mold 2, and the half mold of the other special-shaped external mold 2 is pressed with it, so that the special-shaped internal mold 3 is fixed on the special-shaped external mold 2, and the special-shaped external mold 2 is placed in the fixing groove 11, so that the two half molds of the special-shaped external mold 2 are spliced ​​into a whole, and the fixing rod 31 is interference fit with the fixing part 22; the assembly of the mold is completed, and the powder filling hole 24 is passed through. A set amount of glass powder is added to the irregular molding cavity 5; then it is squeezed and filled, and the extrusion mold 4 is covered to strengthen the effect of gravity on the powder, and the powder is placed in a high-temperature nitrogen furnace for sintering. The extrusion mold 4 pushes the high-temperature melted glass slurry to flow and form according to the expected shape of the irregular molding cavity 5. After the internal glass slurry is condensed and formed, the irregular external mold 2 is taken out of the fixing groove 11 as a whole, and the irregular external mold 2 is split into two half molds, and the extrusion mold 4 is separated from the finished glass tube. Finally, the fixing rod 31 and the extrusion rod 32 are reserved through the fixed rod 31 and the extrusion rod 32. The fixed rod 31 and the extrusion rod 32 are taken out from the finished glass tube to obtain the desired irregular glass tube.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mold for making a special-shaped glass tube, characterized in that: It comprises a fixed mold (1), wherein a special-shaped external mold (2) is arranged inside the fixed mold (1), a special-shaped internal mold (3) is coaxially arranged inside the special-shaped external mold (2), an extrusion mold (4) is arranged on the top of the special-shaped external mold (2), and the extrusion mold (4) penetrates the top of the special-shaped internal mold (3); The special-shaped external mold (2), the special-shaped internal mold (3) and the extrusion mold (4) are arranged to form a special-shaped molding cavity (5).

2. The mold for making a special-shaped glass tube according to claim 1, characterized in that: At least two exhaust holes (21) are provided on the special-shaped external mold (2), wherein the top of the exhaust hole (21) is connected to the outside, and the bottom is connected to the special-shaped molding cavity (5).

3. The mold for making a special-shaped glass tube according to claim 1, characterized in that: The fixed mold (1) is a square block. The fixed mold (1) is provided with a fixed groove (11). The special-shaped external mold (2) is arranged in the fixed groove (11). The size of the fixed groove (11) is adapted to the special-shaped external mold (2).

4. The mold for making a special-shaped glass tube according to claim 1, characterized in that: The cross section of the special-shaped external mold (2) is an inverted Y-shape, comprising two symmetrical fixing parts (22), the two fixing parts (22) being arranged in the fixed mold (1), an extrusion part (23) being connected between the two fixing parts (22), a powder filling hole (24) being provided through the extrusion part (23), and the extrusion mold (4) being coaxially arranged in the powder filling hole (24).

5. The mold for making a special-shaped glass tube according to claim 4, characterized in that: The special-shaped internal mold (3) comprises two fixing rods (31) which coaxially penetrate the fixing portion (22), and an extrusion rod (32) which coaxially penetrates the extrusion mold (4), and the tops of the two fixing rods (31) and the bottoms of the extrusion rods (32) are detachably connected.

6. The mold for making a special-shaped glass tube according to claim 5, characterized in that: The two fixing rods (31) and the extrusion rod (32) are connected by a tenon-and-mortise structure.

7. The mold for making a special-shaped glass tube according to claim 5, characterized in that: The diameter of an end of the fixing rod (31) away from the extrusion rod (32) is greater than the diameter of an end of the fixing rod (31) close to the extrusion rod (32).

8. The mold for making a special-shaped glass tube according to claim 5, characterized in that: The fixed mold (1), the special-shaped external mold (2), the special-shaped internal mold (3) and the extrusion mold (4) are all made of graphite.

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