High-vacuum tungsten-molybdenum alloy casting mold

Abstract

According to the high-vacuum tungsten-molybdenum alloy casting mold, a plurality of discharging rods comprise cylindrical rods and frustum-shaped rods which are connected with each other, the frustum-shaped rods are matched with frustum-shaped channels, the cylindrical rods deviate from a first mold and penetrate through a cavity cover, and first sealing structures are arranged between the cylindrical rods and the cavity cover. According to the high-vacuum tungsten-molybdenum alloy casting mold, the outer side of the first mold is provided with the multiple frustum-shaped channels which are communicated to the first cavity and expand gradually, the cavity cover is arranged on the outer side of the first mold to form the closed negative pressure cavity, the frustum-shaped channels are communicated to the negative pressure cavity, and the cavity cover can play a buffering role; even if high-temperature alloy liquid in the cavity enters the cavity cover, corresponding safety threats cannot be immediately caused; when the discharging rod moves towards the second mold, in the vacuumizing process, negative pressure in the negative pressure cavity acts on the mold cavity, and when the frustum-shaped rod and the frustum-shaped channel are matched, sealing is formed between the frustum-shaped rod and the frustum-shaped channel.

Description

Technical Field

[0001] The utility model relates to the field of mold mechanisms, in particular to a high vacuum tungsten-molybdenum alloy casting mold. Background Art

[0002] Very low pressure state, almost close to a completely gas-free environment. During the casting process, a high vacuum environment helps prevent gas from interfering with the casting process, thereby ensuring casting quality. This type of mold is often used in manufacturing processes that require very high product quality and precision, such as precision mechanical parts, automotive parts, etc. A high vacuum environment can reduce the impact of gas on the casting process, thereby improving the quality and precision of the casting.

[0003] The vacuum casting mold needs to be equipped with a vacuum pumping structure, and the corresponding vacuum pumping structure also needs to be equipped with a corresponding sealing mechanism to prevent leakage of high-temperature alloy liquid. The mold also needs to be equipped with multiple push rods for the demoulding process, and the corresponding push rod structure also needs to be equipped with a sealing mechanism to prevent leakage of high-temperature alloy liquid. The above multiple structure settings have greatly increased the structural complexity of the entire mold, and the risk of leakage has not been minimized. Utility Model Content

[0004] The main purpose of the utility model is to provide a high vacuum tungsten-molybdenum alloy casting mold, aiming to solve the problem that a vacuum casting mold needs to be provided with a vacuum pumping structure, a corresponding sealing mechanism must also be provided for the corresponding vacuum pumping structure, and a sealing mechanism must also be provided for the corresponding push rod structure. The setting of multiple structures greatly increases the structural complexity of the entire mold, and at the same time the risk of leakage is not reduced to a minimum.

[0005] In order to achieve the above object, the utility model provides a high vacuum tungsten-molybdenum alloy casting mold, comprising:

[0006] A first mold, wherein a first cavity is disposed inside the first mold, and a plurality of gradually expanding frustum-shaped channels leading to the first cavity are disposed outside the first mold;

[0007] A second mold is disposed on the first mold, and a second cavity is disposed inside the second mold. A feed port leading to the second cavity is disposed outside the second mold. When the first mold is combined with the second mold, the first cavity and the second cavity form a cavity;

[0008] A cavity cover is arranged outside the first mold to form a closed negative pressure cavity, the frustum-shaped channel leads to the negative pressure cavity, and an air extraction port is arranged on the cavity cover;

[0009] A plurality of discharge rods include cylindrical rods and frustoconical rods connected to each other, wherein the frustoconical rods match the frustoconical channels, the cylindrical rods are arranged away from the first mold and pass through the cavity cover, and a first sealing structure is arranged between the cylindrical rods and the cavity cover.

[0010] Furthermore, an air pressure sensor is provided on the cavity cover.

[0011] Furthermore, a second sealing structure is provided between the frustoconical rod and the frustoconical channel.

[0012] Furthermore, a dimensional interference is formed between the frustoconical rod and the frustoconical channel.

[0013] Furthermore, the taper of the frustum-shaped channel is between 1:10 and 1:20.

[0014] Furthermore, a connection structure is provided between the cylindrical rod and the frustum-shaped rod.

[0015] Furthermore, the cavity cover and the first mold are welded.

[0016] Furthermore, there are multiple feed ports, which are evenly arranged around the center of the second cavity.

[0017] Furthermore, the cavity cover is ring-shaped.

[0018] Furthermore, the width of the annular negative pressure cavity is consistent with the diameter of the end of the frustum-shaped channel away from the second cavity.

[0019] The utility model provides a high vacuum tungsten-molybdenum alloy casting mold, wherein a plurality of gradually expanding frustum-shaped channels leading to a first cavity are arranged on the outside of the first mold, a cavity cover is arranged on the outside of the first mold to form a closed negative pressure cavity, the frustum-shaped channels are led to the negative pressure cavity, and the cavity cover can be used as a buffer, even if the high-temperature alloy liquid in the cavity enters the cavity cover, it will not immediately cause a corresponding safety threat; when the lower feed rod moves toward the second mold, in the process of vacuuming, the negative pressure in the negative pressure cavity acts on the cavity, and when the frustum-shaped rod and the frustum-shaped channel are matched, a seal is formed between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a wheel-shaped part;

[0021] Figure 2 This is a schematic diagram of a high vacuum tungsten-molybdenum alloy casting mold of the first embodiment of the utility model (combined state);

[0022] Figure 3 This is a schematic diagram of the first mold in the high vacuum tungsten-molybdenum alloy casting mold of the first embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the second mold in the high vacuum tungsten-molybdenum alloy casting mold of the first embodiment of the utility model;

[0024] Figure 5 It is a cross-sectional schematic diagram of a high vacuum tungsten-molybdenum alloy casting mold of the first embodiment of the utility model (vacuumed state);

[0025] Figure 6 yes Figure 5 A partial enlarged view of

[0026] Figure 7 It is a cross-sectional schematic diagram of a high vacuum tungsten-molybdenum alloy casting mold of the first embodiment of the utility model (sealed state);

[0027] Figure 8 yes Figure 7 A partial enlarged view of .

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0031] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0032] Reference Figures 1 to 8 In one embodiment of the utility model, a high vacuum tungsten-molybdenum alloy casting mold comprises:

[0033] A first mold 100 is provided with a first cavity 110 on the inner side, and a plurality of gradually expanding frustum-shaped channels 120 leading to the first cavity 110 are provided on the outer side of the first mold 100;

[0034] The second mold 200 is disposed on the first mold 100, and a second cavity 210 is disposed inside. A feed port 220 connected to the second cavity 210 is disposed outside the second mold 200. When the first mold 100 and the second mold 200 are combined, the first cavity 110 and the second cavity 210 form a cavity 020;

[0035] The cavity cover 300 is arranged outside the first mold 100 to form a closed negative pressure cavity 310. The frustum-shaped channel 120 leads to the negative pressure cavity 310. The cavity cover 300 is provided with an air extraction port.

[0036] A plurality of discharge rods 400 include cylindrical rods 410 and frustoconical rods 420 connected to each other, wherein the frustoconical rods 420 match the frustoconical channels 120, and the cylindrical rods 410 are disposed away from the first mold 100 and pass through the cavity cover 300, and a first sealing structure is disposed between the cylindrical rods 410 and the cavity cover 300.

[0037] In the prior art, a vacuum casting mold needs to be provided with a vacuum pumping structure, and a corresponding sealing mechanism must also be provided for the corresponding vacuum pumping structure to avoid leakage of the high-temperature alloy liquid; the mold also needs to be provided with multiple push rods for the corresponding demolding process, and a sealing mechanism must also be provided for the corresponding push rod structure to avoid leakage of the high-temperature alloy liquid; the setting of the above multiple structures has greatly increased the structural complexity of the entire mold, and the risk of leakage has not been reduced to a minimum.

[0038] In the present invention, a high vacuum tungsten-molybdenum alloy casting mold is used to process a tungsten-molybdenum alloy wheel-shaped part 010. A first cavity 110 is arranged inside the first mold 100, and a plurality of gradually expanding frustum-shaped channels 120 leading to the first cavity 110 are arranged outside the first mold 100. The frustum-shaped channels 120 provide an installation foundation for the subsequent blanking rod 400.

[0039] The second mold 200 is disposed on the first mold 100, and a second cavity 210 is disposed inside. When the first mold 100 and the second mold 200 are combined, the first cavity 110 and the second cavity 210 form a cavity 020. A feed port 220 connected to the second cavity 210 is disposed outside the second mold 200. Cavity 020 is used to process parts, and high-temperature alloy liquid is injected into cavity 020 to complete the processing process.

[0040] The cavity cover 300 is arranged outside the first mold 100 to form a closed negative pressure cavity 310. The frustum-shaped channel 120 is connected to the negative pressure cavity 310, and a vacuum port is arranged on the cavity cover 300. The cavity cover 300 can act as a buffer. Even if the high-temperature alloy liquid in the cavity 020 enters the cavity cover 300, it will not immediately cause a corresponding safety threat. The vacuum degree in the negative pressure cavity 310 is detected by the air pressure sensor. When the negative pressure cavity 310 is connected to the cavity 020, the air pressure sensor detects the vacuum degree in the connected structure. The value of the air pressure sensor can guide the vacuuming process, and the value of the air pressure sensor can also provide a reference for leakage.

[0041] The plurality of feed pins 400 include cylindrical rods 410 and frustoconical rods 420 connected to each other, and the frustoconical rods 420 match the frustoconical channels 120. The cylindrical rods 410 are disposed away from the first mold 100 and through the cavity cover 300. A first sealing structure is disposed between the cylindrical rods 410 and the cavity cover 300. When the feed pins 400 move toward the second mold 200, a gap is formed between the frustoconical rods 420 and the frustoconical channels 120. During the vacuuming process, the negative pressure in the negative pressure chamber 310 acts on the mold cavity 020. When the frustoconical rods 420 match the frustoconical channels 120, a seal is formed between the two, and the cylindrical rods 410 and the cavity cover 300 continue to have a sealing effect, so that the mold cavity 020 and the negative pressure chamber 310 are not connected. It is particularly noted that the frustum-shaped rod 420 and the frustum-shaped channel 120 are both frustum-shaped, so when the two are combined, an excellent sealing effect can be formed.

[0042] During the working process, when the second mold 200 and the first mold 100 are combined, the processing process is completed. The blanking rod 400 moves a certain distance toward the second mold 200, so that a gap is formed between the frustum-shaped rod 420 and the frustum-shaped channel 120, and the negative pressure is started to form a vacuum environment in the mold cavity 020 through the negative pressure chamber 310. After the vacuuming process is completed, the blanking rod 400 moves toward the first mold 100, so that a seal is formed between the frustum-shaped rod 420 and the frustum-shaped channel 120, and finally the casting process is completed.

[0043] In summary, a plurality of gradually expanding conical channels 120 connected to the first cavity 110 are arranged on the outside of the first mold 100, and the cavity cover 300 is arranged on the outside of the first mold 100 to form a closed negative pressure cavity 310. The conical channels 120 are connected to the negative pressure cavity 310, and the cavity cover 300 can serve as a buffer. Even if the high-temperature alloy liquid in the cavity 020 enters the cavity cover 300, it will not immediately cause a corresponding safety threat. When the lower rod 400 moves toward the second mold 200, during the vacuum extraction process, the negative pressure in the negative pressure cavity 310 acts on the cavity 020, and when the conical rod 420 matches the conical channel 120, a seal is formed between the two.

[0044] In one embodiment, an air pressure sensor is disposed on the cavity cover 300 .

[0045] In this embodiment, the vacuum degree in the negative pressure chamber 310 is detected by the air pressure sensor. When the negative pressure chamber 310 is connected to the mold cavity 020, the air pressure sensor detects the vacuum degree in the connected structure. The value of the air pressure sensor can guide the vacuuming process, and the value of the air pressure sensor can also provide a reference for leakage.

[0046] In one embodiment, a second sealing structure is disposed between the frustoconical rod 420 and the frustoconical channel 120 .

[0047] In this embodiment, a second sealing structure is added between the frustum-shaped rod 420 and the frustum-shaped channel 120, thereby improving the sealing effect between the feed rod 400 and the first mold 100 and reducing the possibility of high-temperature alloy liquid entering the cavity cover 300. The specific form of the second sealing structure is not limited, but it is preferably a hard sealing method, so as to meet the high-temperature use environment.

[0048] In one embodiment, a dimensional interference is formed between the frustoconical rod 420 and the frustoconical channel 120 .

[0049] In this example, a certain difference in taper is formed between the frustoconical channel 120 and the frustoconical rod 420, so that the frustoconical rod 420 is interference fit in the frustoconical channel 120, and when the frustoconical rod 420 and the frustoconical channel 120 are fitted, the sealing effect between the two is better.

[0050] In one embodiment, the taper of the frustum-shaped channel 120 is between 1:10 and 1:20.

[0051] In this example, the taper of the frustum-shaped channel 120 is limited, and the corresponding frustum-shaped rod 420 is also matched with a corresponding taper; the above taper setting forms a better seal while having high structural strength.

[0052] In one embodiment, a connection structure is formed between the cylindrical rod 410 and the frustum-shaped rod 420 .

[0053] In this example, considering that the length of the blanking rod 400 is sometimes long, which makes it difficult to process the frustum-shaped rod 420, especially when the processing size requirements of the frustum-shaped rod 420 are very strict, a connection structure is provided between the cylindrical rod 410 and the frustum-shaped rod 420, thereby reducing the difficulty of processing. Specifically, the connection between the two can be welding or threaded connection.

[0054] In one embodiment, the length of the frustoconical rod 420 is consistent with that of the frustoconical channel 120 .

[0055] In this example, the lengths of the two are made consistent, which is beneficial to the structural strength and improves the sealing effect.

[0056] In one embodiment, the cavity cover 300 and the first mold 100 are welded.

[0057] In this embodiment, considering that if the cavity cover 300 and the first mold 100 are an integrated structure, the difficulty of processing is increased, the cavity cover 300 and the first mold 100 are set as a welding structure, which achieves simple processing while meeting the sealing requirements.

[0058] In one embodiment, there are multiple feed ports 220 , which are evenly arranged around the center of the second cavity 210 .

[0059] In this embodiment, the number of feed ports 220 is increased and evenly arranged, so as to improve the uniformity of the molten alloy liquid in the cavity 020 when injecting it. For example, the number of feed ports 220 is preferably 4 or 6, so as to ensure the injection effect without greatly increasing the difficulty of operation.

[0060] Reference Figures 5 to 8 In one embodiment, the cavity cover 300 is ring-shaped.

[0061] In this embodiment, the annular cavity cover 300 has a high structural strength and can also reduce material consumption.

[0062] In one embodiment, the width of the annular negative pressure cavity 310 is consistent with the diameter of the end of the frustum-shaped channel 120 away from the second cavity 210 .

[0063] In this embodiment, the width of the negative pressure cavity 310 is limited by the diameter of the outer end of the frustum-shaped channel 120 (that is, the end away from the second cavity 210), which can meet the requirements of the discharge rod 400 passing through the frustum-shaped channel 120. At this time, the structural size of the cavity cover 300 is the smallest, which saves materials, improves the structural strength, and ensures that the negative pressure addition process is smoother.

[0064] In summary, in the high vacuum tungsten-molybdenum alloy casting mold provided by the utility model, a plurality of gradually expanding conical channels 120 connected to the first cavity 110 are arranged on the outside of the first mold 100, and the cavity cover 300 is arranged on the outside of the first mold 100 to form a closed negative pressure cavity 310, and the conical channels 120 are connected to the negative pressure cavity 310. The cavity cover 300 can be used as a buffer, and even if the high-temperature alloy liquid in the cavity 020 enters the cavity cover 300, it will not immediately cause a corresponding safety threat; when the lower rod 400 moves toward the second mold 200, during the vacuum extraction process, the negative pressure in the negative pressure cavity 310 acts on the cavity 020, and when the conical rod 420 matches the conical channel 120, a seal is formed between the two.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high vacuum tungsten-molybdenum alloy casting mold, characterized in that: include: A first mold (100) having a first mold cavity (110) disposed inside, and a plurality of gradually expanding frustum-shaped channels (120) connected to the first mold cavity (110) disposed outside the first mold (100); A second mold (200) is disposed on the first mold (100) in a separate manner, and a second mold cavity (210) is disposed on the inner side thereof. A feed port (220) connected to the second mold cavity (210) is disposed on the outer side of the second mold (200). When the first mold (100) and the second mold (200) are combined, the first mold cavity (110) and the second mold cavity (210) form a mold cavity (020); A cavity cover (300) is arranged outside the first mold (100) to form a closed negative pressure cavity (310), the frustum-shaped channel (120) is connected to the negative pressure cavity (310), and a gas extraction port is arranged on the cavity cover (300); A plurality of discharge rods (400) include cylindrical rods (410) and frustoconical rods (420) connected to each other, wherein the frustoconical rods (420) match the frustoconical channels (120), and the cylindrical rods (410) are arranged away from the first mold (100) and pass through the cavity cover (300), and a first sealing structure is arranged between the cylindrical rods (410) and the cavity cover (300).

2. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1, characterized in that: An air pressure sensor is provided on the cavity cover (300).

3. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: A second sealing structure is provided between the frustum-shaped rod (420) and the frustum-shaped channel (120).

4. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: A dimensional interference is formed between the frustum-shaped rod (420) and the frustum-shaped channel (120).

5. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: The taper of the frustum-shaped channel (120) is between 1:10 and 1:

20.

6. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: A connection structure is provided between the cylindrical rod (410) and the frustum-shaped rod (420).

7. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: The cavity cover (300) and the first mold (100) are in a welding structure.

8. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: The number of the feed ports (220) is plural and they are evenly arranged around the center of the second cavity (210).

9. The high vacuum tungsten-molybdenum alloy casting mold according to claim 1 or 2, characterized in that: The cavity cover (300) is ring-shaped.

10. The high vacuum tungsten-molybdenum alloy casting mold according to claim 9, characterized in that: The width of the annular negative pressure cavity (310) is consistent with the diameter of the end of the frustum-shaped channel (120) away from the second cavity (210).

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