Metal mold low-pressure casting mold for large GIS (Gas Insulated Switchgear) shell

Abstract

The invention relates to the technical field of casting molds, and discloses a large GIS shell metal mold low-pressure casting mold which comprises an equipment fixing lower mold plate, a pressing mechanism, a mold body, an equipment movable upper mold plate, a movable mold plate and a casting system. The mold body is fixedly connected to the middle of the upper surface of the equipment fixing lower mold plate, the movable mold plate is installed on the upper surface of the mold body, a pouring gate is formed in the center of the lower surface of the equipment fixing lower mold plate, and the inner surface of the pouring gate is sleeved with a sprue bush. The movable mold plate comprises an equipment movable left mold plate and an equipment movable right mold plate which are oppositely arranged, a sand core is arranged in the mold main body, the casting system is arranged in the sand core, and the equipment movable upper mold plate is mounted on the upper surface of the mold main body; through cooperation of the structures, pressurization feeding can be conducted from the bottom, cooling of castings can be accelerated through metal outer mold inner cavity sand core low-pressure casting, and the technological yield of products is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of casting molds, and in particular relates to a large-scale GIS shell metal mold low-pressure casting mold. Background Art

[0002] GIS shell metal mold low-pressure casting mold is used to produce large GIS aluminum alloy shells, using low-pressure casting technology. The principle is to press qualified aluminum alloy liquid into the mold with compressed air, crystallize under a certain pressure, and form high-quality castings.

[0003] Most of the low-pressure casting molds for GIS shell metal molds in the prior art are cast in sand molds, resulting in poor surface quality of the castings and loose internal structures. Sand mold modeling requires a long curing time, and the sand mold surface needs to be coated with paint and dry, which also increases the production cycle; the sand molds are one-by-one, and a set of sand molds are required to produce one piece. The rough surface of the sand mold requires additional brushing, polishing and other processes, which increases the manufacturing cost. Moreover, the casting is high, and it is very easy to involve gas and inclusions during gravity pouring, with poor air tightness and a high scrap rate. In addition, a riser needs to be added to the top, and the pouring system is extremely complicated, the process yield is low, the production efficiency is low, the cost is high, and it is difficult to achieve automated mass production.

[0004] For this reason, we propose a large-scale GIS shell metal mold low-pressure casting mold. Summary of the invention

[0005] The purpose of the present invention is to provide a large GIS shell metal mold low-pressure casting mold for pressurizing and shrinkage compensation from the bottom, and the low-pressure casting of the metal outer mold inner sand core can accelerate the cooling of the casting and improve the product process yield.

[0006] The technical solution adopted by the present invention is as follows: A large GIS shell metal mold low-pressure casting mold, comprising a fixed lower template, a clamping mechanism, a mold body, a movable upper template, a movable template and a casting system, wherein the clamping mechanism is installed on the upper surface of the fixed lower template, the mold body is fixedly connected to the middle of the upper surface of the fixed lower template, the movable template is installed on the upper surface of the mold body, a casting port is opened at the center of the lower surface of the fixed lower template, and a gate sleeve is provided on the inner surface of the casting port; The movable template includes a movable left template and a movable right template that are relatively arranged. A sand core is arranged inside the mold body. The casting system is arranged inside the sand core. The movable upper template is installed on the upper surface of the mold body.

[0007] In a preferred embodiment of the invention, the clamping mechanism includes a guide sleeve, which is fixedly connected to the upper surface of the device fixed lower template, and a guide column is installed at the output end of the guide sleeve, and the end of the guide column away from the guide sleeve is fixedly connected to the device fixed template.

[0008] In a preferred embodiment of the invention, the number of the guide sleeves is four, and the four guide sleeves are arranged around the four corners of the upper surface of the lower template of the equipment for fixing.

[0009] In a preferred embodiment of the invention, the casting system is composed of a plurality of crisscross runners, and a plurality of gates are provided on the runners.

[0010] In a preferred embodiment of the invention, the feed port of the casting system is connected to the casting port through the sprue sleeve.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In the present invention, when casting the GIS shell, the raw material can be cast into the casting system through the gate sleeve at the casting port, and the raw material enters the sand core through the casting system, so as to reduce the gas and inclusions in the casting. The aluminum liquid at the top has a low temperature, so that the first solidification end is formed, and the end is pressurized from the bottom to compensate for shrinkage. The low-pressure casting of the sand core in the inner cavity of the metal outer mold can accelerate the cooling of the casting and improve the product process yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a stereogram of the present invention; Figure 2 It is a stereogram of another viewing angle of the present invention; Figure 3 is a front view of the present invention; Figure 4 It is a structural schematic diagram of the casting system in the present invention.

[0013] Explanation of the accompanying reference numerals: 1-equipment fixed lower template; 2-clamping mechanism; 3-mould body; 4-equipment movable upper template; 5-movable template; 6-casting system; 11-casting gate; 12-gate sleeve; 21-guide sleeve; 22-guide column; 23-equipment fixed template; 51-equipment movable left template; 52-equipment movable right template; 61-gate. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The following will be combined Figure 1-Figure 4 A large GIS shell metal mold low-pressure casting mold according to an embodiment of the present invention is described in detail. Example

[0016] Reference Figure 1-Figure 4 A large-scale GIS shell metal mold low-pressure casting mold comprises a fixed lower template 1, a clamping mechanism 2, a mold body 3, a movable upper template 4, a movable template 5 and a casting system 6. The clamping mechanism 2 is installed on the upper surface of the fixed lower template 1, the mold body 3 is fixedly connected to the middle of the upper surface of the fixed lower template 1, the movable template 5 is installed on the upper surface of the mold body 3, a casting port 11 is opened at the center of the lower surface of the fixed lower template 1, and a gate sleeve 12 is sleeved on the inner surface of the casting port 11; the movable template 5 comprises a relatively arranged movable left template 51 and a relatively arranged movable right template 52, a sand core is arranged inside the mold body 3, the casting system 6 is arranged inside the sand core, and the movable upper template 4 is arranged inside the mold body 3. The movable upper template 4 is installed on the upper surface of the mold body 3, and the casting system 6 is arranged inside the sand core. The casting system 6 is composed of a plurality of criss-cross runners, and a plurality of gates 61 are opened on the runners. The feed port of the casting system 6 is connected with the casting port 11 through the gate sleeve 12; specifically, when casting the GIS shell, the raw material can be cast into the casting system 6 through the gate sleeve 12 at the casting port 11, and the raw material enters the sand core through the casting system 6, so as to reduce the gas and inclusions in the casting. The temperature of the aluminum liquid at the top is low, so that the first solidification end is formed, and the end is pressurized from the bottom to compensate for shrinkage, thereby greatly improving the process yield rate. The low-pressure casting of the sand core in the inner cavity of the metal outer mold can accelerate the cooling of the casting and improve the product process yield rate.

[0017] Reference Figure 1-Figure 4The clamping mechanism 2 includes a guide sleeve 21, which is fixedly connected to the upper surface of the fixed lower template 1 of the equipment. A guide column 22 is installed at the output end of the guide sleeve 21. The end of the guide column 22 away from the guide sleeve 21 is fixedly connected to the fixed template 23 of the equipment. There are four guide sleeves 21, and the four guide sleeves 21 are arranged at the four corners of the upper surface of the fixed lower template 1 of the equipment. Specifically, the fixed template 23 of the equipment is driven to move downward by the guide column 22, so that the fixed template 23 of the equipment can be pressed on the upper surface of the movable upper template 4 of the equipment, and the movable upper template 4 of the equipment can be firmly fixed in a predetermined position to prevent vibration or displacement during the casting process, thereby ensuring the stability and accuracy of the mold.

[0018] The implementation principle of the embodiment of a large GIS shell metal mold low-pressure casting mold of the present application is: When using the device, first connect to an external power supply. When casting the GIS shell, the raw material can be cast into the casting system 6 through the gate sleeve 12 at the casting port 11. The raw material enters the sand core through the casting system 6 to reduce the gas and inclusions in the casting. The temperature of the aluminum liquid at the top is low, forming an early solidification end, which is pressurized from the bottom to compensate for shrinkage, thereby greatly improving the process yield. The low-pressure casting of the metal outer mold inner cavity sand core can accelerate the cooling of the casting and improve the product process yield.

[0019] On the other hand, the guide column 22 drives the fixed template 23 to move downward, so that the fixed template 23 can be pressed against the upper surface of the movable upper template 4, and the movable upper template 4 can be firmly fixed at a predetermined position to prevent vibration or displacement during the casting process, thereby ensuring the stability and accuracy of the mold. It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 large GIS shell metal mold low-pressure casting mold, comprising a fixed lower mold plate (1), a clamping mechanism (2), a mold body (3), a movable upper mold plate (4), a movable mold plate (5) and a casting system (6), characterized in that: The clamping mechanism (2) is mounted on the upper surface of the fixed lower template (1) of the device, the mold body (3) is fixedly connected to the middle of the upper surface of the fixed lower template (1) of the device, the movable template (5) is mounted on the upper surface of the mold body (3), a casting gate (11) is opened at the center of the lower surface of the fixed lower template (1) of the device, and the inner surface of the casting gate (11) is provided with a gate sleeve (12); The movable template (5) comprises a movable left template (51) and a movable right template (52) arranged relatively to each other, a sand core is arranged inside the mold body (3), the casting system (6) is arranged inside the sand core, and the movable upper template (4) is installed on the upper surface of the mold body (3).

2. A large GIS shell metal mold low-pressure casting mold according to claim 1, characterized in that: The clamping mechanism (2) comprises a guide sleeve (21), the guide sleeve (21) being fixedly connected to the upper surface of the device fixed lower template (1), a guide column (22) being installed at the output end of the guide sleeve (21), and an end of the guide column (22) away from the guide sleeve (21) being fixedly connected to the device fixed template (23).

3. A large GIS shell metal mold low-pressure casting mold according to claim 2, characterized in that: The number of the guide sleeves (21) is four, and the four guide sleeves (21) are arranged around the four corners of the upper surface of the device fixed lower template (1).

4. A large GIS shell metal mold low-pressure casting mold according to claim 1, characterized in that: The casting system (6) is composed of a plurality of crisscross runners, and a plurality of gates (61) are provided on the runners.

5. A large GIS shell metal mold low-pressure casting mold according to claim 4, characterized in that: The feed port of the casting system (6) is connected to the casting port (11) via the casting sleeve (12).

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