Exhaust mechanism for small deep cavity of cold core box

Abstract

The invention relates to the technical field of casting mold cold core boxes, in particular to a cold core box fine deep cavity exhaust mechanism which comprises a cold core box body, an exhaust part and a core ejecting rod. And the exhaust part comprises a limiting top block, a first rubber pad, a second rubber pad, an exhaust insert, a third rubber pad, a clamping ring, a breathable separation net and a fourth rubber pad. In the cold core box, the exhaust part and the top core rod are arranged, and air communicating with the interior of the sand core casting mold penetrates through the breathable separation net and the interior of the insert main body; a plurality of exhaust grooves which are annularly and uniformly distributed at intervals are used for dispersing and exhausting towards the horizontal outer side, dispersed and guided air is collected and exhausted outwards along an exhaust cavity channel, the matched exhaust insert adopts a mode of steering and exhausting from the bottom of a fine deep cavity through hole to the side surface, a core ejection rod can be mounted to ensure ejection of a sand core, and the sand core can be prevented from falling off. And the exhaust function of the mold can also be considered.

Description

Technical Field

[0001] This invention relates to the field of cold core box technology for casting molds, specifically a small deep cavity venting mechanism for a cold core box. Background Technology

[0002] In existing cold core boxes for sand casting molds, some small, deep cavities may appear. Due to the narrow and deep location of these cavities, only a core ejector hole can usually be drilled to ensure the sand core can be ejected. After drilling the core ejector hole, there is no space to place the vent plug. Existing technical solutions can solve the venting problem, but the effect is not good. There are two main existing technical solutions: First, venting is carried out through the gap between the core ejector hole and the core ejector. If the venting gap is too small, it will lead to poor venting and incomplete ejection of the sand core. Second, a larger vent plug is customized, with a core ejector hole pre-drilled in the middle of the vent plug. The core ejector passes through the middle of the vent plug and is drilled from the back of the cavity. The vent plug is installed from the back of the cavity. In this method, the root of the small part of the sand core is prone to local loose sand core quality problems. Take the venting mechanism for the small, deep cavities of the cold core box mentioned above as an example.

[0003] The original exhaust method of the cold core box small deep cavity exhaust mechanism is to directly exhaust from the small deep cavity. When shooting sand, the air pressure is released too quickly, which can easily lead to various defects in the sand core. Therefore, in order to solve the above problems, a cold core box small deep cavity exhaust mechanism is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a cold core box small deep cavity exhaust mechanism to solve the problem that the original exhaust methods mentioned above all directly exhaust from the small deep cavity, and the air pressure is released too quickly during sand shooting, resulting in various defects in the sand core.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A small deep cavity venting mechanism for a cold core box includes a cold core box body, an venting component, and a top core rod. The venting component is installed inside the cold core box body. The top core rod is installed between the through hole on the top of the cold core box body and the top of the venting component. The venting component includes a limiting top block, a first rubber pad, a second rubber pad, an venting insert, a third rubber pad, a retaining ring, a venting mesh, and a fourth rubber pad. The first rubber pad is installed on the outer side of the upper limit top block. The second rubber pad is installed on the top of the limiting top block. The venting insert is installed on the top of the second rubber pad. The third rubber pad is installed on the outer side of the upper limit insert. The retaining ring is installed inside the venting insert. The venting mesh is fixedly installed inside the retaining ring. The fourth rubber pad is installed between the inner side of the upper limit insert and the outer side of the lower top core rod.

[0006] Preferably, the limiting top block includes a threaded tube block, an annular groove, and an internal hexagonal groove. The annular groove is provided inside the upper part of the threaded tube block, and the internal hexagonal groove is provided inside the lower part of the threaded tube block.

[0007] Preferably, the top of the limiting block is provided with an exhaust insert, the exhaust insert includes an insert body, an annular plate and an exhaust groove, the annular plate is fixedly provided inside the insert body, and the exhaust groove is provided on the inner wall and bottom of the insert body.

[0008] Preferably, the insert body is installed inside the cold core box body. The cold core box body includes a box body, ear plates, an exhaust channel, connecting air pipes, and rubber rings. Ear plates with pre-made threaded holes are symmetrically distributed and fixed at the front and rear ends of the box body. An exhaust channel is provided inside the box body. Two connecting air pipes with external threads are symmetrically fixed at the front and rear ends of the box body. The connecting air pipes are connected to the exhaust channel. A rubber ring is installed inside the connecting air pipe.

[0009] Preferably, the inside of the box body through hole is threadedly assembled with the outside of the threaded tube block, the first rubber pad and the third rubber pad are in contact with and limited by the inside of the box body through hole, and the second rubber pad is installed inside the annular groove.

[0010] Preferably, a retaining ring is installed inside the ring plate, and the top end of the ring plate and the top end of the retaining ring abut against and limit the movement of the bottom end of the fourth rubber pad.

[0011] Preferably, the bottom of the insert body abuts against and limits the top of the second rubber pad, and a number of the exhaust grooves are evenly spaced in a ring and disposed inside the insert body.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, through the cold core box body, venting component and top core rod, the air communicating between the top core rod and the inside of the sand core casting mold passes through the breathable mesh and the inside of the insert body, and is dispersed and vented to the horizontal outside through several venting grooves that are evenly spaced in a ring. The dispersed and guided air is collected and discharged outward along the venting cavity. The above-mentioned venting insert adopts the method of turning the venting from the bottom of the small deep cavity through hole to the side, which can not only install the top core rod to ensure the ejection of the sand core, but also take into account the venting function of the mold. 2. In this invention, a third rubber pad is installed on the outer side of the upper part of the cold core box body, an exhaust component, and a top core rod. A first rubber pad is installed on the outer side of the upper part of the threaded tube block. A second rubber pad is installed inside the annular groove. The internal hexagonal groove and the L-shaped hexagonal fastening wrench are rotated to make the threaded tube block and the deep cavity through hole of the box body threadedly assembled. After installation, the first rubber pad and the third rubber pad are in contact with and limited by the through hole of the box body. The exhaust mechanism adopts an assembled sealed installation structure, and the main body of the mechanism has a stable installation combination limit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the cold core box body and the top core rod of the present invention; Figure 2 This is a schematic diagram of the installation of the cold core box body, exhaust components, and top core rod of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram at point A; Figure 4 For the present invention Figure 2 Schematic diagram at point B; Figure 5 This is a schematic cross-sectional view of the box body of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram at point C; Figure 7 This is a schematic diagram of the exhaust insert of the present invention; Figure 8 This is a schematic diagram of the insert body, ring plate, and venting groove of the present invention; Figure 9 This is a schematic diagram of the insert body and the venting groove of the present invention; Figure 10 This is a schematic diagram of the threaded pipe block and annular groove of the present invention; Figure 11 This is a schematic diagram of the threaded pipe block and the internal hexagonal groove of the present invention.

[0014] In the diagram: 1. Cold core box body; 11. Box body; 12. Ear plate; 13. Exhaust chamber; 14. Connecting air pipe; 15. Rubber ring; 2. Exhaust component; 21. Limiting top block; 211. Threaded pipe block; 212. Ring groove; 213. Internal hexagonal groove; 22. First rubber pad; 23. Second rubber pad; 24. Exhaust insert; 241. Insert body; 242. Ring plate; 243. Exhaust groove; 25. Third rubber pad; 26. Snap ring; 27. Breathable mesh; 28. Fourth rubber pad; 3. Top core rod. Detailed Implementation

[0015] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0016] In the embodiments of the invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the position or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Similarly, words such as "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0017] Furthermore, in the embodiments of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances.

[0018] Please see Figure 1-11 The present invention provides a technical solution: A small deep cavity venting mechanism for a cold core box includes a cold core box body 1, an venting component 2, and a top core rod 3. The venting component 2 is installed inside the cold core box body 1. The top core rod 3 is installed between the through hole at the top of the cold core box body 1 and the top of the venting component 2. The venting component 2 includes a limiting top block 21, a first rubber pad 22, a second rubber pad 23, an venting insert 24, a third rubber pad 25, a retaining ring 26, a venting mesh 27, and a fourth rubber pad 28. The first rubber pad 22 is installed on the outer side above the limiting top block 21. The second rubber pad 23 is installed on the top of the limiting top block 21. The venting insert 24 is installed on the top of the second rubber pad 23. The third rubber pad 25 is installed on the outer side above the venting insert 24. The retaining ring 26 is installed inside the venting insert 24. The venting mesh 27 is fixedly installed inside the retaining ring 26. The fourth rubber pad 28 is installed between the inner top of the venting insert 24 and the outer side below the top core rod 3, forming a combined venting component 2.

[0019] The limiting top block 21 includes a threaded pipe block 211, an annular groove 212, and an internal hexagonal groove 213. The annular groove 212 is provided inside the upper part of the threaded pipe block 211, and the internal hexagonal groove 213 is provided inside the lower part of the threaded pipe block 211. This configuration forms an integral limiting top block 21 that abuts against the exhaust insert 24. The exhaust insert 24 is located on the top of the limiting top block 21. The exhaust insert 24 includes an insert body 241, an annular plate 242, and an exhaust groove 243. The annular plate 242 is fixedly disposed inside the insert body 241. The inner wall and bottom of the insert body 241... An exhaust groove 243 is provided, forming an integrated exhaust insert 24 that directs the exhaust direction. The insert body 241 is installed inside the cold core box body 1. The cold core box body 1 includes a box body 11, ear plates 12, an exhaust cavity 13, connecting air pipes 14, and rubber rings 15. Ear plates 12 with pre-drilled threaded holes are symmetrically fixed at the front and rear ends of the box body 11. An exhaust cavity 13 is provided inside the box body 11. Two connecting air pipes 14 with external threads are symmetrically fixed at the front and rear ends of the box body 11. The connecting air pipes 14 are connected to the exhaust... The air passage 13 is connected, and a rubber ring 15 is installed inside the connecting air pipe 14. This configuration forms a cold core box body 1 with an integrated lateral exhaust structure. The box body 11 has a through hole and a threaded assembly with the outer side of the threaded tube block 211. The first rubber pad 22 and the third rubber pad 25 abut and limit the movement of the box body 11 through hole. A second rubber pad 23 is installed inside the annular groove 212. This configuration, through the threaded assembly of the threaded tube block 211 and the box body 11, forms a combined installation of the exhaust insert 24. A ring plate 242 is installed inside... The retaining ring 26, the top of the ring plate 242, and the top of the retaining ring 26 abut against and limit the bottom of the fourth rubber pad 28. Through the above arrangement, the installation structure of the exhaust insert 24 and the fourth rubber pad 28 is formed. The bottom of the insert body 241 abuts against and limits the top of the second rubber pad 23. Several exhaust grooves 243 are evenly spaced in a ring and arranged inside the insert body 241. Through the above arrangement, the exhaust is dispersed outward by the several evenly spaced exhaust grooves 243. The dispersed and guided air is collected and discharged outward along the exhaust cavity 13.

[0020] Workflow: This invention provides a small deep cavity venting mechanism for a cold core box. The venting mechanism adopts an assembled sealed installation structure. The main body of the mechanism has a stable installation and assembly limit, and in conjunction with the venting insert 24, it adopts a venting method that turns from the bottom of the small deep cavity through hole to the side. This not only allows for the installation of the core rod 3 to ensure the ejection of the sand core, but also takes into account the venting function of the mold. Specifically, a third rubber pad 25 is installed on the outer side of the insert body 241, a first rubber pad 22 is installed on the outer side of the threaded tube block 211, a second rubber pad 23 is installed inside the annular groove 212, and the bottom of the insert body 241 is installed on top of the second rubber pad 23. The internal hexagonal groove 213 is rotated in conjunction with an L-shaped hexagonal wrench, so that the threaded tube block 211 is threadedly assembled with the inside of the deep cavity through hole of the box body 11. After installation, the first rubber pad 22 and the third rubber pad 25 abut against the inside of the through hole of the box body 11. The top core rod 3 is connected to the inside of the sand core casting mold. A retaining ring 26 is installed inside the ring plate 242. The top of the ring plate 242 and the top of the retaining ring 26 are in contact with the bottom of the fourth rubber pad 28 for limiting. The connecting air pipe 14 and rubber ring 15 are installed in conjunction with the delivery pipe head of the external vacuum exhaust equipment for sealing. This allows two sets of the same type of vacuum exhaust equipment with the same specifications and parameters to be symmetrically installed at the front and rear ends of the cold core box body 1. When the exhaust mechanism is in use, the vacuum exhaust equipment is started using the same parameter settings by the PLC controller. The air connected between the top core rod 3 and the inside of the sand core casting mold passes through the breathable mesh 27 and the inside of the insert body 241, and is dispersed and exhausted horizontally outward through several uniformly spaced and annularly distributed exhaust grooves 243. The dispersed and guided air is collected and discharged outward along the exhaust channel 13.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold core box micro-deep cavity exhaust mechanism, comprising a cold core box body (1), an exhaust component (2), and a top core rod (3), characterized in that: The cold core box body (1) is equipped with an exhaust component (2). A top core rod (3) is installed between the through hole on the top of the cold core box body (1) and the top of the exhaust component (2). The exhaust component (2) includes a limiting top block (21), a first rubber pad (22), a second rubber pad (23), an exhaust insert (24), a third rubber pad (25), a retaining ring (26), a breathable mesh (27), and a fourth rubber pad (28). The first rubber pad (22) is installed on the outer side above the limiting top block (21). A second rubber pad (23) is installed on the top of the limiting top block (21), an exhaust insert (24) is installed on the top of the second rubber pad (23), a third rubber pad (25) is installed on the outer side above the exhaust insert (24), a retaining ring (26) is installed inside the exhaust insert (24), a breathable mesh (27) is fixedly installed inside the retaining ring (26), and a fourth rubber pad (28) is installed between the inner side above the exhaust insert (24) and the outer side below the top core rod (3).

2. The cold core box micro-deep cavity exhaust mechanism according to claim 1, characterized in that: The limiting top block (21) includes a threaded tube block (211), an annular groove (212) and an internal hexagonal groove (213). The annular groove (212) is provided inside the upper part of the threaded tube block (211), and the internal hexagonal groove (213) is provided inside the lower part of the threaded tube block (211).

3. The cold core box micro-deep cavity exhaust mechanism according to claim 2, characterized in that: The top of the limiting block (21) is provided with an exhaust insert (24). The exhaust insert (24) includes an insert body (241), an annular plate (242) and an exhaust groove (243). The annular plate (242) is fixedly provided inside the insert body (241), and the exhaust groove (243) is provided on the inner wall and bottom of the insert body (241).

4. The cold core box micro-deep cavity exhaust mechanism according to claim 3, characterized in that: The insert body (241) is installed inside the cold core box body (1). The cold core box body (1) includes a box body (11), ear plates (12), exhaust channels (13), connecting air pipes (14) and rubber rings (15). The front and rear ends of the box body (11) are symmetrically and fixedly provided with ear plates (12) with pre-made threaded holes. The box body (11) is provided with an exhaust channel (13). The front and rear ends of the box body (11) are symmetrically and fixedly provided with two connecting air pipes (14) with external threads. The connecting air pipes (14) are connected to the exhaust channels (13). The connecting air pipes (14) are installed inside the connecting air pipes (14).

5. The cold core box micro-deep cavity exhaust mechanism according to claim 4, characterized in that: The box body (11) is threadedly assembled with the threaded tube block (211) on the outside of the through hole. The first rubber pad (22) and the third rubber pad (25) are in contact with and limited by the through hole of the box body (11). The second rubber pad (23) is installed inside the annular groove (212).

6. The cold core box micro-deep cavity exhaust mechanism according to claim 3, characterized in that: A retaining ring (26) is installed inside the ring plate (242), and the top of the ring plate (242) and the top of the retaining ring (26) abut against and limit the bottom of the fourth rubber pad (28).

7. The cold core box micro-deep cavity exhaust mechanism according to claim 3, characterized in that: The bottom of the insert body (241) abuts against the top of the second rubber pad (23) and is limited. Several exhaust grooves (243) are evenly spaced in a ring and arranged inside the insert body (241).

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