Die for graphite crucible production

Abstract

The utility model discloses a mould for graphite crucible production, and particularly relates to the technical field of graphite crucible production, which comprises a heating barrel and a mounting plate mounted at the output end of a hydraulic cylinder, a plurality of extension rods are arranged at the lower end of the mounting plate, a fixed support is fixed at the lower ends of the extension rods, and a hollow upper mould is fixed on the inner wall of the fixed support. An exhaust assembly is arranged on the bottom face of an inner cavity of the upper mold, a first oil inlet pipe and a first oil outlet pipe are fixed to the outer surface of the upper mold and communicate with the interior of the upper mold, and a material ejecting assembly is further arranged in an inner cavity of the heating barrel. According to the mold for producing the graphite crucible, the design of the exhaust assembly is adopted, the quality of a formed part can be improved, meanwhile, demolding of a device is facilitated, the design of the material ejecting assembly is adopted, the formed part does not need to be poured out after the mold is cooled, operation of the device is facilitated, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite crucible production, and particularly relates to a mold for graphite crucible production. Background Technique

[0002] Graphite crucibles are mainly used for smelting non-ferrous metals and their alloys such as red copper, brass, gold, silver, zinc, and lead. Their main raw materials include graphite, silicon carbide, silica, refractory clay, asphalt, and tar. The manufacturing process of graphite crucibles can be divided into three types: hand molding, rotational molding, and compression molding. Among them, compression molding uses pressure equipment such as hydraulic pressure, water pressure, or air pressure as the kinetic energy and a steel mold as the plastic tool for crucible molding. It has the advantages of simple process, short production cycle, high finished product rate and efficiency, low labor intensity, high product quality and density.

[0003] Chinese patent document CN220297926U discloses a graphite crucible forming mold. The telescopic end of an electric push rod is provided with a lower pressing template sleeved on a support guide rod. An upper mold is installed in the middle of the plate frame of the lower pressing template. The shaft end of the lifting screw rod is provided with an upper pushing template sleeved on the support guide rod, and a lower mold B corresponding to the lower mold A is installed in the middle of the plate frame of the upper pushing template. The utility model can perform stable and precise compression molding work on the graphite crucible by using the stamping and alignment of the upper mold assembly and the lower mold assembly, improve the forming efficiency and quality of the graphite crucible, and after the graphite crucible is formed, by using the lifting transmission of the two groups of lifting screw rods in the lower mold assembly, the rotational force can be converted into a longitudinal thrust to open the two mutually aligned lower molds, exposing the crucible mold, which is convenient for workers to take and place the formed crucible mold.

[0004] However, when the device is actually used, it is necessary to turn the lifting screw rod to complete demolding, which is inconvenient for the operation of the device, and a vacuum will be formed between the upper mold and the formed part when the upper mold and the lower mold are separated, which will cause the formed part to crack during demolding, resulting in relatively poor forming quality. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a mold for graphite crucible production, which can effectively solve the problems of inconvenient operation of the device and relatively poor forming quality.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A mold for producing graphite crucibles, comprising a heating barrel and a mounting plate installed at the output end of a hydraulic cylinder. A plurality of extension rods are provided at the lower end of the mounting plate, and a fixed bracket is fixedly connected to the lower ends of the plurality of extension rods. An upper mold with a hollow interior is fixedly connected to the inner wall of the fixed bracket. An exhaust assembly is provided on the bottom surface of the inner cavity of the upper mold. An oil inlet pipe 1 and an oil drain pipe 1 are fixedly connected to the outer surface of the upper mold, and both the oil inlet pipe 1 and the oil drain pipe 1 are communicated with the inside of the upper mold. A blanking assembly is further provided in the inner cavity of the heating barrel.

[0008] Preferably, an oil inlet pipe 2 and a water inlet pipe are provided at the lower part of the outer surface of the heating barrel, and an oil drain pipe 2 and a drain pipe are provided at the upper part of the outer surface of the heating barrel.

[0009] Preferably, the exhaust assembly includes a mounting block fixedly connected to the inner cavity of the upper mold. A frustum-shaped groove is formed at the lower end of the mounting block, and an exhaust groove is formed on the top surface of the inner cavity of the frustum-shaped groove. A hydraulic rod 1 is fixedly connected to the top surface of the inner cavity of the exhaust groove. A frustum-shaped sealing block adapted to the frustum-shaped groove is fixedly connected to the output end of the hydraulic rod 1. An exhaust pipe communicated with the inside of the exhaust groove is fixedly connected to the outer surface of the mounting block, and one end of the exhaust pipe away from the exhaust groove is always communicated with the outside.

[0010] Preferably, when the hydraulic rod 1 is in a natural state, a gap is left between the side wall of the frustum-shaped groove and the side wall of the frustum-shaped sealing block.

[0011] Preferably, the blanking assembly includes a hydraulic rod 2 fixedly connected to the bottom surface of the inner cavity of the heating barrel. A lower mold is fixedly connected to the top surface of the inner cavity of the heating barrel, and the lower mold is communicated with the outside. The output end of the hydraulic rod 2 penetrates upward through the lower mold. A blanking block is fixedly connected to the output end of the hydraulic rod 2. A placement groove adapted to the blanking block is further formed on the bottom surface of the inner cavity of the lower mold.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model adopts the design of the exhaust assembly. Through the mutual cooperation between the hydraulic rod 1 and the frustum-shaped sealing block, the air inside the raw materials can be discharged when the device is in use, improving the quality of the formed parts. At the same time, when the device is demolded, it can also prevent a vacuum from being generated between the upper mold and the inner cavity of the formed part, thereby preventing the formed part from cracking, improving the quality of the formed part and facilitating the demolding of the device.

[0014] 2. The utility model adopts the design of the blanking assembly. By utilizing the characteristics of the lower mold, the formed mold can be ejected by the lower mold when the device is demolded, without waiting for the mold to cool down and then pouring out the formed part, facilitating the operation of the device and improving the work efficiency. Description of the Drawings

[0015] Figure 1Schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 Internal schematic diagram of the upper mold of the present utility model;

[0017] Figure 3 For the present utility model Figure 2 Enlarged view of part A;

[0018] Figure 4 Schematic diagram of the structure of the ejector assembly of the present utility model;

[0019] Figure 5 Cross-sectional view of the equipment during use of the present utility model;

[0020] Figure 6 For the present utility model Figure 5 Enlarged view of part B.

[0021] In the figure: 1, mounting plate; 2, exhaust assembly; 3, ejector assembly; 11, heating barrel; 12, extension rod; 13, fixed bracket; 14, upper mold; 15, first oil inlet pipe; 16, first oil drain pipe; 17, second oil inlet pipe; 171, second oil drain pipe; 18, water inlet pipe; 181, drain pipe; 21, mounting block; 22, frustum-shaped groove; 23, exhaust groove; 24, first hydraulic rod; 25, frustum-shaped sealing block; 26, exhaust pipe; 31, second hydraulic rod; 32, lower mold; 33, ejector block; 34, placement groove. Specific embodiments

[0022] To make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] As Figure 1 shown, a mold for graphite crucible production includes a heating barrel 11 and a mounting plate 1 installed at the output end of a hydraulic cylinder. At the same time, when the device is in use, the mounting plate 1 is installed at the output end of the hydraulic cylinder, and the heating barrel 11 only needs to be placed directly below the output end of the mounting plate 1 during use, which is convenient for the mold closing operation of the two molds. There are multiple extension rods 12 at the lower end of the mounting plate 1, and a fixed bracket 13 is fixedly connected to the lower ends of the multiple extension rods 12. The inner wall of the fixed bracket 13 is fixedly connected with a hollow upper mold 14. Among them, the fixed bracket 13 is used for the installation of the upper mold 14, and the fixed bracket 13 and the upper mold 14 can be fixedly connected by internal hexagons, which is convenient for the replacement of the upper mold 14, so that the device can be applied to different molds (including but not limited to molds of different sizes and shapes). The bottom surface of the inner cavity of the upper mold 14 is provided with an exhaust assembly 2.

[0024] In addition, an oil inlet pipe 15 and an oil drain pipe 16 are fixed to the outer surface of the upper die 14, and both the oil inlet pipe 15 and the oil drain pipe 16 communicate with the inside of the upper die 14. Due to the design of the extension rod 12 and the fixed bracket 13, it is convenient to install the oil inlet pipe 15 and the oil drain pipe 16. At the same time, when the device is in use, high-temperature oil is injected into the upper die 14 through the oil inlet pipe 15, and then the high-temperature oil is discharged from the oil drain pipe 16. The device uses the high-temperature oil to melt the raw materials, facilitating the hot pressing and forming of the raw materials. A material ejecting assembly 3 is also provided in the inner cavity of the heating barrel 11.

[0025] As Figure 1 and Figure 5 shown, an oil inlet pipe 17 and a water inlet pipe 18 are provided at the lower part of the outer surface of the heating barrel 11, and an oil drain pipe 171 and a drain pipe 181 are provided at the upper part of the outer surface of the heating barrel 11. During the use of the device, high-temperature oil is injected into the heating barrel 11 through the oil inlet pipe 17, and then the high-temperature oil is discharged from the oil drain pipe 171, enabling the high-temperature oil to circulate in the heating barrel 11, thereby melting the raw materials and facilitating the forming of the graphite crucible. The device adopts a design of lower inlet and upper outlet, which can extend the time of the high-temperature oil in the heating barrel 11, facilitate the melting of the raw materials by the high-temperature oil, and improve the energy utilization rate of the device. After the graphite crucible is formed, the injection of high-temperature oil is stopped first, and then cold water is injected into the upper die 14 through the water inlet pipe 18. The cold water can absorb the heat of the high-temperature oil and also enable the formed graphite crucible to cool down quickly, facilitating the removal of the formed graphite crucible.

[0026] As Figure 2 and Figure 3 shown, the exhaust assembly 2 includes a mounting block 21 fixed to the inner cavity of the upper die 14. A frustum-shaped groove 22 is opened at the lower end of the mounting block 21, and an exhaust groove 23 is opened on the top surface of the inner cavity of the frustum-shaped groove 22. A hydraulic rod 24 is fixed to the top surface of the inner cavity of the exhaust groove 23. Among them, the exhaust groove 23 is used for the installation of the hydraulic rod 24. At the same time, the exhaust groove 23 can also form an exhaust cavity. A frustum-shaped sealing block 25 adapted to the frustum-shaped groove 22 is fixed to the output end of the hydraulic rod 24. When the hydraulic rod 24 is in a natural state, there is a gap between the side wall of the frustum-shaped groove 22 and the side wall of the frustum-shaped sealing block 25. The frustum-shaped sealing block 25 is used to seal the frustum-shaped groove 22. A exhaust pipe 26 communicating with the inside of the exhaust groove 23 is fixed to the outer surface of the mounting block 21, and one end of the exhaust pipe 26 away from the exhaust groove 23 is always communicated with the outside. When the side wall of the frustum-shaped sealing block 25 does not contact the side wall of the frustum-shaped groove 22, the frustum-shaped groove 22 can communicate with the outside through the exhaust pipe 26. When the side wall of the frustum-shaped sealing block 25 contacts the side wall of the frustum-shaped groove 22, the frustum-shaped sealing block 25 seals the frustum-shaped groove 22, making the frustum-shaped groove 22 not communicate with the outside.

[0027] As Figure 4As shown, the ejector assembly 3 includes a second hydraulic rod 31 fixed to the bottom surface of the inner cavity of the heating barrel 11. The top surface of the inner cavity of the heating barrel 11 is fixed with a lower mold 32, and the lower mold 32 communicates with the outside. When the upper mold 14 is located inside the lower mold 32, a cavity for forming (such as Figure 5 shown at C in Figure 6 ) can be formed between the outer wall of the upper mold 14 and the inner wall of the lower mold 32, which is convenient for the forming of the graphite crucible. A cavity for high-temperature oil can also be formed between the lower mold 32 and the second hydraulic rod 31, so that the high-temperature oil can enter this cavity to heat the raw materials in the lower mold 32. When in use, the lower mold 32 can be connected to the second hydraulic rod 31 by bolts, which is convenient for the replacement of the lower mold 32.

[0028] In addition, if the lower mold 32 and the second hydraulic rod 31 are connected by bolts, a high-temperature resistant gasket needs to be provided between the lower mold 32 and the second hydraulic rod 31 to prevent the hydraulic oil from leaking out. The output end of the second hydraulic rod 31 penetrates upward through the lower mold 32, which is convenient for ejecting the formed part without waiting for the mold to cool down and then pouring out the formed part, facilitating the operation of the device and improving work efficiency at the same time. A ejector block 33 is fixed to the output end of the second hydraulic rod 31, and the ejector block 33 is used to eject the formed part. A placement groove 34 adapted to the ejector block 33 is also provided on the bottom surface of the inner cavity of the lower mold 32, and the placement groove 34 is used to accommodate the ejector block 33, so as to make the bottom of the formed part without depression and improve the quality of the formed part.

[0029] The specific implementation mode of this embodiment is as follows: When the device is in use, first pour the raw materials into the lower mold 32, and then control the high-temperature oil to enter the cavity between the lower mold 32 and the second hydraulic rod 31. The high-temperature oil heats the raw materials. At the same time, the high-temperature oil is also controlled to enter the upper mold 14 to heat the upper mold 14, so that the device can heat the raw materials better and is convenient for the forming of the graphite crucible;

[0030] First, control the output end of the hydraulic cylinder to extend, so that the upper mold 14 moves downward. When the frustum-shaped sealing block 25 contacts the raw material and the upper mold 14 continues to move downward, under the action of the first hydraulic rod 24, the frustum-shaped sealing block 25 moves upward relative to the upper mold 14, so that the air in the lower mold 32 can be discharged to the outside through the frustum-shaped groove 22, the exhaust groove 23, and the exhaust pipe 26. The air inside the graphite crucible after hot pressing can be discharged, reducing the gas in the formed part and improving the quality of the formed part. When the upper mold 14 moves downward, it can also push the ejector block 33, causing the output end of the second hydraulic rod 31 to contract until the ejector block 33 contracts into the placement groove 34 (when the upper mold 14 presses the raw material, since there is a gap between the side wall of the upper mold 14 and the side wall of the lower mold 32, the raw material will be squeezed into the gap, facilitating the ejector block 33 to enter the placement groove 34. At the same time, the lower part of the ejector block 33 can be designed with an inclination to facilitate squeezing out the raw material in the placement groove 34. If the bottom of the graphite crucible is thick, the placement groove 34 can be not provided, so that there is a groove at the bottom of the formed part. Due to the thick design of the bottom of the formed part, this groove will not affect the quality of the formed part).

[0031] After the device hot presses the graphite crucible, control the output end of the hydraulic cylinder to contract. At this time, due to the characteristics of the first hydraulic rod 24, the frustum-shaped sealing block 25 will move downward relative to the upper mold 14, making the frustum-shaped sealing block 25 not seal the frustum-shaped groove 22, so that the formed part communicates with the outside, preventing a vacuum from being generated between the upper mold 14 and the inner cavity of the formed part, which may cause the formed part to crack. While improving the forming quality, it also facilitates the demolding of the device. At the same time, due to the design of the second hydraulic rod 31, the ejector block 33 can eject the formed part, eliminating the need to pour out the formed part after the mold cools, which facilitates the operation of the device and improves work efficiency.

[0032] It should be noted that the specific installation methods, circuit connection methods, and control methods of the upper mold 14, lower mold 32, hydraulic cylinder, and hydraulic rod in the present utility model are all conventional designs, and the present utility model will not elaborate on them in detail.

[0033] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A mold for producing a graphite crucible, comprising a heating barrel (11) and a mounting plate (1) mounted on the output end of a hydraulic cylinder, characterized in that: A plurality of extension rods (12) are provided at the lower end of the mounting plate (1), and a fixed bracket (13) is commonly fixed at the lower ends of the plurality of extension rods (12). A hollow upper mold (14) is fixed to the inner wall of the fixed bracket (13). An exhaust assembly (2) is provided on the bottom surface of the inner cavity of the upper mold (14). An oil inlet pipe (15) and an oil drain pipe (16) are fixed on the outer surface of the upper mold (14), and the oil inlet pipe (15) and the oil drain pipe (16) are both connected to the interior of the upper mold (14). A material ejecting assembly (3) is also provided in the inner cavity of the heating barrel (11).

2. The mold for producing a graphite crucible according to claim 1, characterized in that: The lower portion of the outer surface of the heating barrel (11) is provided with an oil inlet pipe (17) and a water inlet pipe (18), and the upper portion of the outer surface of the heating barrel (11) is provided with an oil drain pipe (171) and a drain pipe (181).

3. The mold for producing a graphite crucible according to claim 1, characterized in that: The exhaust assembly (2) comprises a mounting block (21) fixed to the inner cavity of the upper mold (14); a truncated cone-shaped groove (22) is provided at the lower end of the mounting block (21); an exhaust groove (23) is provided on the top surface of the inner cavity of the truncated cone-shaped groove (22); a hydraulic rod 1 (24) is fixed to the top surface of the inner cavity of the exhaust groove (23); a truncated cone-shaped sealing block (25) matched with the truncated cone-shaped groove (22) is fixed to the output end of the hydraulic rod 1 (24); an exhaust pipe (26) connected to the inside of the exhaust groove (23) is fixed to the outer surface of the mounting block (21); and one end of the exhaust pipe (26) away from the exhaust groove (23) is always connected to the outside.

4. The mold for producing a graphite crucible according to claim 3, characterized in that: When the hydraulic rod 1 (24) is in a natural state, no gap is left between the side wall of the truncated cone groove (22) and the side wall of the truncated cone sealing block (25).

5. The mold for producing a graphite crucible according to claim 3, characterized in that: The ejection assembly (3) comprises a second hydraulic rod (31) fixed to the bottom surface of the inner cavity of the heating barrel (11); a lower mold (32) is fixed to the top surface of the inner cavity of the heating barrel (11); and the lower mold (32) is communicated with the outside; an output end of the second hydraulic rod (31) passes through the lower mold (32) upward; an ejection block (33) is fixed to the output end of the second hydraulic rod (31); and a placement groove (34) adapted to the ejection block (33) is also provided on the bottom surface of the inner cavity of the lower mold (32).

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