Vacuum casting sand box with recovery function for coke oven iron castings

Abstract

The utility model discloses a vacuum casting sand box with a recovery function for a coke oven iron casting, and relates to the technical field of sand mold casting. The device comprises a sand box base; casting the iron box; a negative pressure tube; a sand box cover; a support device; the inner wall of the sand box base is fixedly connected with a sand pumping iron pipe, and the outer wall of the sand pumping iron pipe is fixedly connected with the outer wall of the bottom of the cast iron box; the supporting device comprises a positioning seat, the outer wall of the positioning seat is slidably connected with a supporting plate through a sliding groove, the sliding groove is formed in the wall of the positioning seat, the outer wall of the supporting plate is fixedly connected with a connecting plate, the outer wall of the connecting plate is fixedly connected with a shaking device, and the outer wall of the connecting plate is slidably connected with a limiting device. The sand pumping iron pipe is connected to the inner wall of the sand box base and used for pumping and recycling molding sand after casting is completed, and on the basis, the shaking device is arranged in the supporting device, so that the purposes of improving the molten metal filling effect and the molding sand recycling efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for sand casting, in particular to a vacuum casting sand box for coke oven cast iron parts with a recycling function. Background Technique

[0002] In the production process of coke oven cast iron parts, there are many problems with traditional casting sand boxes. On the one hand, it is difficult to recycle the molding sand after casting, often resulting in waste of resources. On the other hand, during the casting process, if the filling effect of the molten metal is not good, it is easy to cause defects such as pores and looseness in the casting, affecting the product quality.

[0003] The utility model is provided with a sand suction iron pipe connected to the inner wall of the sand box base. After casting is completed, the molding sand can be conveniently extracted for recycling, effectively improving the resource utilization rate. At the same time, a shaking device is arranged in the supporting device, which can promote the flow and filling of the molten metal during the casting process, improving the casting quality and the molding sand recycling efficiency. In addition, by setting a limiting device, with the design of the insertion block and the pulling groove, it is convenient to operate, and the positions of the connecting plate and the supporting plate can be fixed to prevent the sand box from accidentally shaking when shaking is not required, ensuring the stability of the casting process. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is: a vacuum casting sand box for coke oven cast iron parts with a recycling function, comprising: a sand box base; a cast iron box, the outer wall of the cast iron box is fixedly connected to the outer wall of the sand box base through a bolt; a negative pressure pipe, the outer wall of the negative pressure pipe is fixedly connected to the inner wall of the cast iron box; a sand box cover, the outer wall of the sand box cover is fixedly connected to the outer wall of the cast iron box through a bolt; a supporting device, the top of the supporting device is fixedly connected to the bottom of the sand box base; a sand suction iron pipe is fixedly connected to the inner wall of the sand box base, and the outer wall of the sand suction iron pipe is fixedly connected to the outer wall of the bottom of the cast iron box; the supporting device includes a positioning seat, the outer wall of the positioning seat is slidably connected to a supporting plate through a chute, and the chute is opened in the wall of the positioning seat. The outer wall of the supporting plate is fixedly connected to a connecting plate, the outer wall of the connecting plate is fixedly connected to a shaking device, and the outer wall of the connecting plate is slidably connected to a limiting device. The sand suction iron pipe is connected to the inner wall of the sand box base for extracting the molding sand for recycling after casting is completed.

[0005] Preferably, lifting blocks are fixedly connected to both ends of the cast iron box, and the top of the connecting plate and the top of the supporting plate are both fixedly connected to the bottom of the sand box base.

[0006] Preferably, the shaking device includes a positioning cylinder. A compression spring is arranged inside the positioning cylinder. The outer wall of the positioning cylinder is slidably connected with a wrapping cylinder. One end of the compression spring is fixedly connected to the outer wall of a connecting plate, and the other end of the compression spring is fixedly connected to the outer wall of a positioning seat. The outer wall of the connecting plate is fixedly connected to the outer wall of the positioning cylinder, and the outer wall of the positioning seat is fixedly connected to the outer wall of the wrapping cylinder. The setting of the shaking device in the supporting device further improves the filling effect of the molten metal and the recycling efficiency of the molding sand.

[0007] Preferably, the limiting device includes an insertion block. The outer wall of the insertion block is slidably connected to the outer wall of the positioning cylinder through a low arc surface groove, and the low arc surface groove is formed in the wall of the insertion block. The outer wall of the insertion block is slidably connected to the outer wall of the wrapping cylinder through a high arc surface groove, and the high arc surface groove is formed in the wall of the insertion block. A pulling groove is formed in the outer wall at the top of the insertion block. The outer wall of the insertion block is slidably connected to the outer wall of the sand box base, and one side of the insertion block away from the sand box base is slidably connected to the outer wall of the positioning seat. When the shaking device does not need to function, the limiting device is set to fix the positions of the connecting plate and the supporting plate to prevent the sand box from shaking.

[0008] The beneficial effects of the present utility model are as follows:

[0009] 1. In the present utility model, a sand pumping iron pipe is connected to the inner wall of the sand box base for pumping the molding sand for recycling after casting. On this basis, the setting of the shaking device in the supporting device further improves the filling effect of the molten metal and the recycling efficiency of the molding sand.

[0010] 2. In the present utility model, the limiting device is set to fix the positions of the connecting plate and the supporting plate to prevent the sand box from shaking. The device facilitates the insertion and extraction operation of the insertion block by setting a pulling groove. Description of the Drawings

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is the partial structural schematic diagram on the cast iron box of the present utility model;

[0013] Figure 3 is the structural schematic diagram of the supporting device of the present utility model;

[0014] Figure 4 is Figure 3 the enlarged structural schematic diagram at A in

[0015] Figure 5 is the structural schematic diagram of the limiting device of the present utility model.

[0016] In the figure: 1. Sand box base; 2. Sand pumping iron pipe; 3. Cast iron box; 4. Negative pressure pipe; 5. Sand box cover; 6. Lifting block; 7. Support device; 71. Positioning seat; 72. Slide groove; 73. Support plate; 74. Connecting plate; 75. Shaking device; 76. Limiting device; 751. Positioning cylinder; 752. Compression spring; 753. Wrapping cylinder; 761. Insertion block; 762. Low arc surface groove; 763. High arc surface groove; 764. Pulling groove. Detailed implementation mode

[0017] The following further describes the present utility model in detail in conjunction with the accompanying drawings and the specific implementation mode. The embodiments of the present utility model are given for the purpose of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0018] Embodiment: Please refer to Figure 1 - Figure 5 The present utility model provides a technical solution: a vacuum casting sand box for coke oven cast iron parts with a recycling function, including: a sand box base 1; a cast iron box 3, the outer wall of the cast iron box 3 is fixedly connected to the outer wall of the sand box base 1 through a pin; a negative pressure pipe 4, the outer wall of the negative pressure pipe 4 is fixedly connected to the inner wall of the cast iron box 3; a sand box cover 5, the outer wall of the sand box cover 5 is fixedly connected to the outer wall of the cast iron box 3 through a pin; a support device 7, the top of the support device 7 is fixedly connected to the bottom of the sand box base 1; a sand pumping iron pipe 2 is fixedly connected to the inner wall of the sand box base 1, and the outer wall of the sand pumping iron pipe 2 is fixedly connected to the outer wall of the bottom of the cast iron box 3; the support device 7 includes a positioning seat 71, the outer wall of the positioning seat 71 is slidably connected to a support plate 73 through a slide groove 72, and the slide groove 72 is opened in the wall of the positioning seat 71. The outer wall of the support plate 73 is fixedly connected to a connecting plate 74, the outer wall of the connecting plate 74 is fixedly connected to a shaking device 75, and the outer wall of the connecting plate 74 is slidably connected to a limiting device 76. During vacuum casting, first, the sand box base 1, the cast iron box 3, and the sand box cover 5 are connected and fixed through pins. Among them, the sand pumping iron pipe 2 is connected to the inner wall of the sand box base 1 and is used to extract the molding sand for recycling after casting. The negative pressure pipe 4 is fixedly connected to the inner wall of the cast iron box 3 and is used to pump vacuum during casting to create a negative pressure environment, so that the molten metal can better fill the mold under vacuum conditions, reducing defects such as air holes.

[0019] Lifting blocks 6 are fixedly connected to both ends of the cast iron box 3, and the top of the connecting plate 74 and the top of the support plate 73 are both fixedly connected to the bottom of the sand box base 1.

[0020] The shaking device 75 includes a positioning cylinder 751. A compression spring 752 is arranged inside the positioning cylinder 751. The outer wall of the positioning cylinder 751 is slidably connected with a wrapping cylinder 753. One end of the compression spring 752 is fixedly connected with the outer wall of the connecting plate 74, and the other end of the compression spring 752 is fixedly connected with the outer wall of the positioning seat 71. The outer wall of the connecting plate 74 is fixedly connected with the outer wall of the positioning cylinder 751, and the outer wall of the positioning seat 71 is fixedly connected with the outer wall of the wrapping cylinder 753. When in use during the casting process, the crane is used to pull the lifting block 6 to make the sand box shake as a whole. At this time, the compression spring 752 on one side is compressed, and the elastic action of the compression spring 752 can make the sand box shake as a whole by a certain amplitude, thereby promoting the flow and filling of the molten metal during the casting process and improving the quality of the casting. At the end of the casting, when recycling the molding sand inside the cast iron box 3, some molding sand adheres to the inner wall of the cast iron box 3. The shaking device 75 is used continuously, so that the molding sand adhering to the cast iron box 3 falls off, and the auxiliary sand suction iron pipe 2 is used to recycle the molding sand that has fallen to the bottom of the cast iron box 3.

[0021] The limiting device 76 includes an insertion block 761. The outer wall of the insertion block 761 is slidably connected with the outer wall of the positioning cylinder 751 through a low arc surface groove 762, and the low arc surface groove 762 is opened in the wall of the insertion block 761. The outer wall of the insertion block 761 is slidably connected with the outer wall of the wrapping cylinder 753 through a high arc surface groove 763, and the high arc surface groove 763 is opened in the wall of the insertion block 761. A pulling groove 764 is opened on the outer wall of the top of the insertion block 761. The outer wall of the insertion block 761 is slidably connected with the outer wall of the sand box base 1. One side of the insertion block 761 away from the sand box base 1 is slidably connected with the outer wall of the positioning seat 71. The insertion block 761 is engaged with the positioning cylinder 751 through the low arc surface groove 762 and engaged with the wrapping cylinder 753 through the high arc surface groove 763. At this time, the insertion block 761 is inserted between the sand box base 1 and the positioning seat 71, and plays a limiting role through its own structural strength to prevent the sand box from shaking.

[0022] Working principle:

[0023] During use, when performing vacuum casting, first fix the sand box base 1, the cast iron box 3 and the sand box cover 5 by pin connection. The sand suction iron pipe 2 is connected to the inner wall of the sand box base 1 and is used to extract the molding sand for recycling after casting. The negative pressure pipe 4 is fixedly connected to the inner wall of the cast iron box 3 and is used to evacuate the air during casting to create a negative pressure environment, enabling the molten metal to better fill the mold in a vacuum state and reducing defects such as air holes. On this basis, a shaking device 75 is provided in the support device 7 to further improve the filling effect of the molten metal and the recycling efficiency of the molding sand. The positioning seat 71 is slidably connected to the support plate 73 through the chute 72 to provide stable support for the sand box. The connecting plate 74 connects the support plate 73 with the shaking device 75. When the shaking device 75 works, one end of the compression spring 752 in the positioning cylinder 751 is fixedly connected to the connecting plate 74, and the other end is fixedly connected to the positioning seat 71. When in use during casting, use a crane to pull the lifting block 6 to shake the entire sand box. At this time, the compression spring 752 on one side is compressed, and the elastic action of the compression spring 752 can cause the entire sand box to shake by a certain amplitude, thereby promoting the flow and filling of the molten metal during casting and improving the quality of the casting. When shaking, the wrapping cylinder 753 slides outside the positioning cylinder 751 to play a role of protection and guidance. At the end of casting, when recycling the molding sand inside the cast iron box 3, some molding sand adheres to the inner wall of the cast iron box 3. Continue to use the shaking device 75 to make the molding sand adhering to the cast iron box 3 fall off, and assist the sand suction iron pipe 2 to recycle the molding sand that has fallen to the bottom of the cast iron box 3.

[0024] When the shaking device 75 is not required to take effect, a limiting device 76 is provided to fix the positions of the connecting plate 74 and the support plate 73. The insertion block 761 is engaged with the positioning cylinder 751 through the low arc surface groove 762 and is engaged with the wrapping cylinder 753 through the high arc surface groove 763. At this time, the insertion block 761 is inserted between the sand box base 1 and the positioning seat 71 and plays a limiting role through its own structural strength to prevent the sand box from shaking. When releasing the limit, simply set the pulling groove 764 to facilitate the insertion and extraction operation of the insertion block 761.

[0025] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A vacuum casting sand box for coke oven cast iron parts with a recycling function, characterized in that, Including: A sand box base (1); A cast iron box (3), the outer wall of the cast iron box (3) is fixedly connected to the outer wall of the sand box base (1) through a bolt; A negative pressure pipe (4), the outer wall of the negative pressure pipe (4) is fixedly connected to the inner wall of the cast iron box (3); A sand box cover (5), the outer wall of the sand box cover (5) is fixedly connected to the outer wall of the cast iron box (3) through a bolt; A support device (7), the top of the support device (7) is fixedly connected to the bottom of the sand box base (1); A sand suction iron pipe (2) is fixedly connected to the inner wall of the sand box base (1), and the outer wall of the sand suction iron pipe (2) is fixedly connected to the outer wall of the bottom of the cast iron box (3); The support device (7) includes a positioning seat (71), a support plate (73) is slidably connected to the outer wall of the positioning seat (71) through a sliding groove (72), and the sliding groove (72) is opened in the wall of the positioning seat (71). A connecting plate (74) is fixedly connected to the outer wall of the support plate (73), a shaking device (75) is fixedly connected to the outer wall of the connecting plate (74), and a limiting device (76) is slidably connected to the outer wall of the connecting plate (74).

2. The vacuum casting sand box for coke oven cast iron parts with a recycling function according to claim 1, characterized in that: Lifting blocks (6) are fixedly connected to both ends of the cast iron box (3), and the top of the connecting plate (74) and the top of the support plate (73) are both fixedly connected to the bottom of the sand box base (1).

3. A vacuum casting sand box for coke oven cast iron parts with a recycling function according to claim 1, characterized in that: The shaking device (75) includes a positioning cylinder (751), a compression spring (752) is arranged inside the positioning cylinder (751), and a wrapping cylinder (753) is slidably connected to the outer wall of the positioning cylinder (751).

4. The vacuum casting sand box for coke oven cast iron parts with a recycling function according to claim 3, characterized in that: One end of the compression spring (752) is fixedly connected to the outer wall of the connecting plate (74), the other end of the compression spring (752) is fixedly connected to the outer wall of the positioning seat (71), the outer wall of the connecting plate (74) is fixedly connected to the outer wall of the positioning cylinder (751), and the outer wall of the positioning seat (71) is fixedly connected to the outer wall of the wrapping cylinder (753).

5. The vacuum casting sand box for coke oven cast iron parts with a recycling function according to claim 3, characterized in that: The limiting device (76) includes an insertion block (761), the outer wall of the insertion block (761) is slidably connected to the outer wall of the positioning cylinder (751) through a low arc surface groove (762), and the low arc surface groove (762) is opened in the wall of the insertion block (761). The outer wall of the insertion block (761) is slidably connected to the outer wall of the wrapping cylinder (753) through a high arc surface groove (763), and the high arc surface groove (763) is opened in the wall of the insertion block (761). A pulling groove (764) is opened on the outer wall of the top of the insertion block (761).

6. The vacuum casting sand box for coke oven cast iron parts with a recycling function according to claim 5, characterized in that: The outer wall of the insertion block (761) is slidably connected to the outer wall of the sand box base (1), and the side of the insertion block (761) away from the sand box base (1) is slidably connected to the outer wall of the positioning seat (71).

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