Exhaust device and sand core mold

Abstract

The utility model relates to an exhaust device and a sand core mold in the technical field of sand cores, the exhaust device comprises a movable block, an exhaust channel is formed in the movable block, an air inlet communicated with the outside is formed in one end of the exhaust channel, and an air outlet communicated with the outside is formed in the other end of the exhaust channel; and the exhaust plug is arranged at the air inlet of the exhaust channel. The exhaust device can be mounted on the vertical wall of the sand core mold, and is matched with the exhaust plug at the bottom of the sand core mold, so that the exhaust efficiency of the sand core mold can be improved, sand shooting and amine blowing curing of a sand core can be better carried out, the amine blowing curing time is shortened, the corner compactness of the sand core is improved, and the situation that the sand core is poor in curing and is not compact to cause scattered sand is reduced.

Description

Technical Field

[0001] The present application relates to the field of sand core technology, and in particular to an exhaust device and a sand core mold. Background Art

[0002] Sand cores are often used to make hollow or complex shaped internal cavities in castings. When making a sand core, you need to first make a sand core mold with the desired shape, then shoot sand into the sand core mold, and then perform other treatments such as extrusion, vibration or amine curing to make the sand core material tightly combined. After the sand core is completely cured, it is taken out of the sand core mold to obtain a sand core with the desired cavity shape.

[0003] To ensure that the sand core is fully filled and avoid the generation of pores and defects, exhaust plugs are installed on the flat and curved surfaces of the sand core mold. The exhaust plugs connect the inside and outside of the sand core mold for exhaust. The current exhaust plugs are cylindrical and can only open a certain number of holes on the inner bottom of the sand core mold. Under the action of gravity, the exhaust plugs are installed in the holes. However, the exhaust plugs are only provided at the bottom of the sand core mold. The exhaust efficiency of the gas in the sand core mold is low, which can easily lead to poor solidification and looseness of the sand core, resulting in scattered sand, which in turn causes sand holes in the casting and causes it to be scrapped. Utility Model Content

[0004] In view of the problems existing in the background technology, the present application provides an exhaust device and a sand core mold. The exhaust device can be installed on the vertical wall of the sand core mold, and cooperate with the exhaust plug at the bottom of the sand core mold to improve the exhaust efficiency of the sand core mold, better carry out sand shooting and amine blowing curing of the sand core, reduce the amine blowing curing time, improve the compactness of the sand core corners, and reduce the occurrence of scattered sand caused by poor curing and loose sand core.

[0005] According to one aspect of the utility model, there is provided an exhaust device, comprising: a movable block, on which an exhaust passage is formed, one end of the exhaust passage forms an air inlet communicating with the outside, and the other end forms an air outlet communicating with the outside;

[0006] An exhaust plug is arranged at an air inlet of the exhaust passage.

[0007] In some embodiments of the present invention, the movable block has a first surface and a second surface that are perpendicular to each other, the air inlet is arranged on the first surface, and the air outlet is arranged on the second surface.

[0008] In some embodiments of the present invention, the exhaust passage is L-shaped.

[0009] In some embodiments of the present invention, more than two exhaust passages are formed on the movable block, and one exhaust plug is provided at the air inlet of each exhaust passage.

[0010] In some embodiments of the present invention, the movable block is in the shape of a rectangular block.

[0011] In some embodiments of the present invention, a bolt hole for fixing the movable block is provided on the movable block.

[0012] In some embodiments of the present invention, a mounting groove capable of accommodating the exhaust plug is provided at the air inlet of the exhaust passage.

[0013] In some embodiments of the present invention, the exhaust plug is interference fit with the mounting groove.

[0014] In some embodiments of the present invention, the exhaust plug is cylindrical.

[0015] According to another aspect of the utility model, a sand core mold is provided, comprising the above-mentioned exhaust device.

[0016] An embodiment of the present application provides an exhaust device, which opens an exhaust channel on a movable block, installs an exhaust plug at the air inlet of the exhaust channel, and then installs the movable block on the outer side of the vertical wall of the sand core mold, so that the air inlet of the exhaust channel faces the vertical wall of the sand core mold, and opens an opening on the vertical wall of the sand core mold that is compatible with the exhaust channel and the exhaust plug. In conjunction with a conventional exhaust plug at the bottom of the sand core mold, during sand shooting and amine blowing for curing, gas can be discharged from the inner bottom and vertical wall of the sand core mold at the same time, thereby improving the exhaust efficiency of the sand core mold, better performing sand shooting and amine blowing for curing of the sand core, reducing amine blowing curing time, improving the compactness of the sand core corners, and reducing the occurrence of scattered sand caused by poor curing and loose sand cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the exhaust device according to the embodiment of the present application;

[0019] Figure 2 It is a cross-sectional view showing the internal structure of the live block;

[0020] Figure 3 It is a schematic diagram showing the bolt hole;

[0021] Figure 4 It is a schematic diagram of assembling the exhaust device on the sand core mold.

[0022] The numbers in the accompanying drawings represent the following: 1. movable block; 2. exhaust plug; 3. exhaust channel; 4. air inlet; 5. air outlet; 6. first surface; 7. second surface; 8. bolt hole; 9. mounting groove; 10. mold body; 11. cavity; 12. vertical wall. DETAILED DESCRIPTION

[0023] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0025] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0026] The exhaust device and the sand core mold provided in the embodiments of the present application are described below in conjunction with the accompanying drawings.

[0027] The present application discloses an exhaust device. Figure 1 and Figure 2 As shown, the exhaust device includes a movable block 1 and an exhaust plug 2; wherein, an exhaust channel 3 is formed on the movable block 1; one end of the exhaust channel 3 forms an air inlet 4 connected to the outside, and the other end forms an air outlet 5 connected to the outside; the exhaust plug 2 is installed at the air inlet 4 of the exhaust channel 3.

[0028] By using the exhaust device in the technical solution, the movable block 1 is installed on the outer side of the vertical wall 12 of the sand core mold, so that the air inlet 4 of the exhaust channel 3 faces the vertical wall 12 of the sand core mold, and an opening adapted to the exhaust channel 3 and the exhaust plug 2 is opened on the vertical wall 12 of the sand core mold, and the conventional exhaust plug 2 at the bottom of the sand core mold is matched. During sand shooting and amine blowing curing, the gas can be discharged from the inner bottom and the vertical wall 12 of the sand core mold at the same time, thereby improving the exhaust efficiency of the sand core mold, better performing sand shooting and amine blowing curing of the sand core, reducing the amine blowing curing time, improving the compactness of the sand core corners, and reducing the occurrence of scattered sand caused by poor curing and loose sand cores.

[0029] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the movable block 1 has a first surface 6 and a second surface 7 that are perpendicular to each other, the air inlet 4 is arranged on the first surface 6 , and the air outlet 5 is arranged on the second surface 7 .

[0030] The first surface 6 is placed close to the vertical wall 12 of the sand core mold, and the second surface 7 is directed downwardly toward the sand core mold, so that the air outlet 5 and the conventional exhaust plug 2 at the bottom of the sand core mold use an exhaust system, thereby ensuring the exhaust efficiency of the exhaust device while reducing the impact on the sand core mold structure.

[0031] Furthermore, the exhaust channel 3 is L-shaped. The L-shaped exhaust channel 3 is relatively simple to process, and the distance between the first surface 6 and the second surface 7 is relatively short, thereby ensuring the efficiency of gas flow in the exhaust channel 3 .

[0032] In other embodiments, the first surface 6 and the second surface 7 may also be set as two opposite surfaces, and the air inlet 4 and the air outlet 5 are respectively arranged on the first surface 6 and the second surface 7; further, the exhaust channel 3 preferably adopts a linear design.

[0033] Furthermore, the movable block 1 is in a rectangular block shape. The rectangular block-shaped movable block 1 has a simple structure, strong adaptability, is easy to process, and has a low production cost.

[0034] In some embodiments of the present invention, Figure 1 As shown, more than two exhaust channels 3 are formed on the movable block 1 , and an exhaust plug 2 is provided at the air inlet 4 of each exhaust channel 3 .

[0035] It can be understood that the size of the movable block 1 and the number of groups of exhaust channels 3 and exhaust plugs 2 on the movable block 1 can be specifically selected according to the difference in the size of the installation space of the exhaust device on the sand core mold. For example, one, two, three or four groups of exhaust channels 3 and exhaust plugs 2 can be used, so that the exhaust device has higher adaptability to the complex installation environment of the vertical wall 12 of the sand core mold.

[0036] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the movable block 1 is provided with bolt holes 8 for fixing the movable block 1 .

[0037] In this embodiment, bolts are inserted into the bolt holes 8 and screwed onto the sand core mold to detachably fix the movable block 1 to the sand core mold, thereby facilitating maintenance of the exhaust device.

[0038] In other embodiments, the movable block 1 and the sand core mold may also be fixed by clamping or other methods, which is not limited here.

[0039] In some embodiments of the present invention, Figure 2 As shown, a mounting groove 9 capable of accommodating the exhaust plug 2 is provided at the air inlet 4 of the exhaust passage 3 .

[0040] Assemble the exhaust plug 2 in the installation groove 9 so that the exhaust plug 2 is flush with the surface of the movable block 1, so that the movable block 1 can better fit the vertical wall 12 of the sand core mold, improve the fit of the movable block 1 on the sand core mold and the stability of the installation, ensure that the gas in the sand core mold is completely discharged through the exhaust channel 3, and ensure the filtering effect of the exhaust plug 2 on the core sand.

[0041] Furthermore, the exhaust plug 2 is interference fit with the mounting groove 9. The exhaust plug 2 and the mounting groove 9 are assembled by interference fit, which makes the installation and removal of the exhaust plug 2 simpler and improves the cleaning and replacement efficiency of the exhaust plug 2.

[0042] Furthermore, the exhaust plug 2 is cylindrical, and corresponding to the shape of the exhaust plug 2, the mounting groove 9 is also cylindrical. Not only can the exhaust plug 2 have a larger filtering area, but the mounting groove 9 is also relatively simple to process through milling and the like. At the same time, the interference fit installation between the exhaust plug 2 and the mounting groove 9 is more flexible and stable.

[0043] Furthermore, the exhaust plug 2 is made of metal material, and the metal material includes but is not limited to steel, copper and the like.

[0044] Another embodiment of the utility model provides a sand core mold, such as Figure 4 As shown, the sand core mold includes a mold body 10 and an exhaust device in any of the above-mentioned embodiments.

[0045] Among them, a cavity 11 is formed in the mold body 10, which is used to form a sand core. The bottom surface of the cavity 11 is the inner bottom of the mold body 10, and the side surface of the cavity 11 is the inner side surface of the vertical wall 12 of the mold body 10. The exhaust device is installed on the outer side surface of the vertical wall 12 of the mold body 10.

[0046] The sand core mold of this embodiment has all the technical effects of the exhaust device of this embodiment, and the specific structure and technical effects of the sand core mold will not be elaborated in detail here. It should be noted that this embodiment only elaborates on the key technical features related to this case, and as for the technical features not related to this case, this embodiment only makes a simple illustration and a simple explanation. For example, this embodiment only briefly explains the sand core mold, and the specific structure of the sand core mold is not elaborated in detail here.

[0047] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An exhaust device, characterized in that: include: A movable block, wherein an exhaust passage is formed on the movable block, wherein one end of the exhaust passage forms an air inlet communicating with the outside, and the other end forms an air outlet communicating with the outside; An exhaust plug is arranged at an air inlet of the exhaust passage.

2. The exhaust device according to claim 1, characterized in that: The movable block has a first surface and a second surface that are perpendicular to each other, the air inlet is arranged on the first surface, and the air outlet is arranged on the second surface.

3. The exhaust device according to claim 2, characterized in that: The exhaust passage is L-shaped.

4. The exhaust device according to claim 1, characterized in that: More than two exhaust passages are formed on the movable block, and one exhaust plug is provided at the air inlet of each exhaust passage.

5. The exhaust device according to any one of claims 1 to 4, characterized in that: The movable block is in the shape of a rectangular block.

6. The exhaust device according to any one of claims 1 to 4, characterized in that: The movable block is provided with bolt holes for fixing the movable block.

7. The exhaust device according to any one of claims 1 to 4, characterized in that: An installation groove capable of accommodating the exhaust plug is provided at the air inlet of the exhaust channel.

8. The exhaust device according to claim 7, characterized in that: The exhaust plug is interference fit with the mounting groove.

9. The exhaust device according to claim 8, characterized in that: The exhaust plug is cylindrical.

10. A sand core mold, characterized in that: Comprising the exhaust device according to any one of claims 1 to 9.

Images