Anti-blocking and anti-falling exhaust plug structure

Abstract

The utility model relates to a kind of exhaust plug structure of anti-blocking anti-falling, comprising: support body, for being set in the step hole of mould, and with the exhaust passage being formed between step hole inner wall;Support body one end is equipped with first connecting part and recess, recess is communicated with exhaust passage;Step hole, it is set on the upper portion of gas plug hole, and with gas plug hole communication;Gas plug hole, with mould cavity communication;Gas plug, including axial connection section, neck section and plug body section in sequence, connection section is used for and first connecting part detachably connected;Plug body section is used for with the clearance fit of gas plug hole, and the exhaust groove for being communicated with cavity is equipped on plug body section;The clearance between neck section and gas plug hole inner wall is formed, it is used for the communication exhaust groove and recess;Groove part is equipped on the end surface for being communicated with cavity of plug body section, for with installation tool cooperation.The utility model improves gas plug structure and then makes gas plug installation process be improved, can effectively prevent gas plug blockage and drop off.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, and in particular to a vent plug structure that prevents clogging and falling off. Background Technology

[0002] In the metal casting process, the vent plug (air plug) is a key component to ensure smooth filling of the mold with molten metal and reduce defects. Its main functions include dynamic venting, pressure balancing, and defect prevention. When molten metal fills the mold cavity, the vent plug promptly removes air, volatile gases from the coating, and hydrogen gas released from the molten metal through pre-set channels, preventing gas stagnation and the formation of high-pressure zones that obstruct the flow of molten metal. Simultaneously, the vent plug optimizes the flow pattern of the molten metal, reducing air entrapment, oxide inclusions, and scouring of the mold walls. This is particularly beneficial for thin-walled or complex-structured castings, significantly reducing the risk of incomplete filling. Furthermore, the vent plug removes dissolved gases such as hydrogen, reducing porosity formed during solidification and assisting in the removal of scum and cold molten metal, thus improving the purity of the molten metal within the mold cavity.

[0003] In actual production, air plugs are typically fitted with the air plug holes in the mold using an interference fit. During installation, the air plug must be manually inserted into the air plug hole from one side of the cavity, and then tapped until the end face of the air plug is flush with the inner wall of the cavity. Due to the limitations of this air plug-to-air plug hole connection structure and installation method, the air plug must be installed in the air plug hole of the mold before it is installed on the machine, so that the mold cavity can be coated under high-temperature conditions to ensure smooth demolding. As a result, the air plug is often coated with paint, severely affecting the venting effect. Furthermore, the interference fit between the air plug and the air plug hole can fail due to machining errors, easily causing the air plug to detach from the mold, leading to interruptions in mold maintenance. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an exhaust plug structure that prevents clogging and falling off.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A vent plug structure that prevents clogging and falling off includes:

[0007] A support body is provided for being installed in a stepped hole of a mold, and an exhaust channel is formed between the support body and the inner wall of the stepped hole; one end of the support body is provided with a first connecting part and a groove, and the groove communicates with the exhaust channel;

[0008] The stepped hole is located above the air plug hole and communicates with the air plug hole;

[0009] The air plug hole is disposed in the mold and communicates with the cavity of the mold;

[0010] An air plug includes a connecting section, a neck section, and a plug body section connected axially in sequence. The connecting section is detachably connected to the first connecting part. The plug body section is clearance-fitted with the air plug hole and has an exhaust groove for communicating with a cavity. A gap is formed between the neck section and the inner wall of the air plug hole, which is used to connect the exhaust groove and the groove.

[0011] The plug section has a groove on its end face for communicating with the cavity, which is used to cooperate with the installation tool.

[0012] The further technical solution is as follows:

[0013] The support body is formed by longitudinally cutting a cylinder on both sides, and the longitudinal cutting forms a first plane and a second plane respectively.

[0014] The circumferential contour of the inner wall of the stepped hole matches the outer circumferential contour of the support body, and the first plane fits against the inner wall of the stepped hole, while the second plane forms the exhaust channel between the inner wall of the stepped hole and the second plane.

[0015] The first plane and the second plane are parallel.

[0016] The first connecting part is located in the middle of the end face of the support body, and the groove is located on both sides of the first connecting part.

[0017] The connecting section is cylindrical and has threads on its circumference for threaded connection with the first connecting part.

[0018] The plug section is cylindrical, and the exhaust grooves are evenly distributed along the circumference.

[0019] The neck section is cylindrical, and its diameter is smaller than that of the plug section and the connecting section.

[0020] The support body has a second connecting part at the other end away from the first connecting part and the groove.

[0021] The width of the support is greater than the width of the air plug.

[0022] The support body is made of steel; the air plug is made of stainless steel.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention improves the air plug structure, changing the traditional method of direct interference fit between the air plug and the mold air plug hole to a clearance fit achieved through connection with a support body. This streamlines the air plug installation process; after coating the mold cavity during production, the air plug is connected to the support body and locked into the mold's air plug hole. This not only effectively prevents the air plug from falling off but also avoids clogging of the air plug's venting groove by the coating, improving venting performance. Furthermore, during mold maintenance, the air plug can be quickly removed from above the mold by pulling out the support body, facilitating disassembly and maintenance.

[0025] Other features and advantages of this invention will be set forth in the following description or may be learned by practicing this invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0027] Figure 2 for Figure 1 Enlarged view of section A.

[0028] Figure 3 This is a schematic diagram of the support structure in an embodiment of the present invention.

[0029] Figure 4 for Figure 1 Top view.

[0030] Figure 5 for Figure 4 Sectional view of section AA.

[0031] Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0032] Figure 7 This is a schematic diagram of the air plug structure in an embodiment of the present invention.

[0033] Figure 8 for Figure 7 Another perspective.

[0034] In the figure: 1. Mold; 2. Support body; 3. Exhaust channel; 4. Air plug; 5. Gap; 21. Groove; 22. Connecting part; 41. Plug section; 42. Neck section; 43. Connecting section; 101. Cavity; 201. First plane; 202. Second plane; 411. Exhaust groove; 412. Groove. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] See Figures 1 to 8The anti-clogging and anti-fall-off exhaust plug structure of this embodiment includes:

[0037] The support body 2 is used to be installed in the stepped hole of the mold 1, and an exhaust channel 3 is formed between it and the inner wall of the stepped hole; one end of the support body 2 is provided with a first connecting part 22 and a groove 21, and the groove 21 communicates with the exhaust channel 3.

[0038] A stepped hole is provided above the air plug hole and communicates with the air plug hole.

[0039] An air plug hole is provided in the mold 1 and communicates with the cavity 101 of the mold 1;

[0040] The air plug 4 includes a connecting section 43, a neck section 42, and a plug body section 41 that are connected axially in sequence.

[0041] Connecting section 43 is used for detachable connection with first connecting part 22;

[0042] The plug section 41 is used to fit with the air plug hole with a clearance, and the plug section 41 is provided with an exhaust groove 411;

[0043] A gap 5 is formed between the neck section 42 and the inner wall of the air plug hole, which is used to connect the exhaust groove 411 and the groove 21;

[0044] The end face of the plug section 41 that communicates with the cavity 101 has a groove 412 for cooperating with the installation tool.

[0045] As a preferred embodiment, the support body 2 is formed by longitudinal cutting of a cylinder on both sides, and the longitudinal cutting forms a first plane 201 and a second plane 202 respectively; the circumferential contour of the inner wall of the stepped hole matches the outer circumferential contour of the support body 2, and the first plane 201 fits against the inner wall of the stepped hole, and the second plane 202 forms an exhaust channel 3 between itself and the inner wall of the stepped hole.

[0046] As a preferred embodiment, the first plane 201 and the second plane 202 are parallel.

[0047] As a preferred embodiment, the width of the support 2 is greater than the width of the air plug 4.

[0048] As a preferred embodiment, the connecting section 43 is cylindrical and has threads on its circumference for threaded connection with the first connecting part 22, i.e., the first connecting part 22 is a threaded hole.

[0049] As a preferred embodiment, the plug section 41 is cylindrical, and the exhaust grooves 411 are evenly distributed along the circumference.

[0050] As a preferred embodiment, the neck section 42 is cylindrical and its diameter is smaller than that of the plug section 41 and the connecting section 43.

[0051] As a preferred embodiment, the groove 412 is preferably a straight groove.

[0052] In this embodiment, during use: First, the end of the support body 2 with the first connecting part 22 and the groove 21 is inserted downwards into the stepped hole of the mold 1, and the bottom end of the support body 2 is supported by the stepped surface at the bottom of the stepped hole. After the mold 1 is installed on the machine, the cavity 101 of the mold 1 is coated with paint, and then the air plug 4 is inserted upwards into the air plug hole from inside the cavity 101. It is connected to the first connecting part 22 of the support body 2 through the connecting section 43, so that the bottom surface of the air plug 4 is flush with the inner wall of the cavity 101, thus completing the installation of the air plug 4. During the mold production process, the gas in the cavity 101 flows through the exhaust groove 411 of the plug body section 41 of the air plug 4, enters the gap 5 formed between the neck section 42 and the inner wall of the air plug hole, and then enters the exhaust channel 3 formed between the support body 2 and the inner wall of the stepped hole through the groove 21 at the bottom end of the support body 2, and is discharged outside the mold 1.

[0053] The support body 2 is attached to the inner wall of the stepped hole of the mold 1 through the first plane 201 to form an anti-rotation structure, thereby ensuring that the support body 2 remains stable during the connection between the support body 2 and the air plug 4.

[0054] Preferably, a tool such as a flathead screwdriver is used to insert into the cavity 101 and engage with the slot of the groove 412 to lock the entire air plug 4 into the first connecting part 22 through the connecting section 43 until the bottom end of the air plug 4 is flush with the inner wall of the cavity 101. This eliminates the need for manual installation of the air plug 4, making it possible to insert the air plug 4 into the air plug hole after spraying. Furthermore, the air plug 4 is threaded to the support body 2, rather than using a traditional interference fit, eliminating the need for hammering. This prevents damage to the exhaust groove 411 and prevents the air plug 4 from falling off, further ensuring exhaust quality.

[0055] As a preferred embodiment, the other end of the support body 2, which is away from the first connecting part 22 and the groove 21, is higher than the upper surface of the mold 1, so that the support body 2 can be pulled out directly after production is completed, and the air plug 4 can be pulled out from the upper part of the mold 2 together.

[0056] As a preferred embodiment, the support body 2 has a second connecting portion (not shown in the figure) at the other end away from the first connecting portion 22 and the groove 21. Using the second connecting portion, the support body 2 can be pulled out with a suitable tool. This simultaneously removes the air plug 4, thus achieving the effect of pulling the air plug 4 out of the mold 1 without opening the mold. Compared to the prior art where the air plug must be removed by using a tool while the mold is open, this method eliminates the need for mold opening and is more convenient.

[0057] As a preferred embodiment, the first connecting part 22 is located in the middle of the end face of the support body 2, and the groove 21 is located on both sides of the first connecting part 22.

[0058] As a preferred option, the support body 2 is made of steel; the air plug 4 is made of stainless steel.

[0059] In summary, this invention designs the air plug in a segmented form, and by machining threads on the connecting sections, it prevents the air plug from falling off during production. This invention improves the air plug structure, thereby changing the installation process and avoiding the venting problems caused by paint buildup during production. This invention achieves quick installation and removal of the air plug by mounting it on a detachable support, reducing the difficulty of mold maintenance. Therefore, this invention improves the stability and ease of installation / removal of the air plug installation structure without affecting the venting effect.

[0060] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vent plug structure that prevents clogging and falling off, characterized in that, include: A support body (2) is provided in a stepped hole of a mold (1) and an exhaust channel (3) is formed between the support body (2) and the inner wall of the stepped hole; one end of the support body (2) is provided with a first connecting part (22) and a groove (21), and the groove (21) communicates with the exhaust channel (3); The stepped hole is located above the air plug hole and communicates with the air plug hole; The air plug hole is disposed in the mold (1) and communicates with the cavity (101) of the mold (1); An air plug (4) comprises a connecting section (43), a neck section (42), and a plug body section (41) connected axially in sequence. The connecting section (43) is detachably connected to the first connecting part (22). The plug body section (41) is clearance-fitted with the air plug hole. The plug body section (41) is provided with an exhaust groove (411) for communicating with the cavity (101). A gap (5) is formed between the neck section (42) and the inner wall of the air plug hole, which is used to communicate the exhaust groove (411) and the groove (21). The plug section (41) has a groove (412) on its end face for communicating with the cavity (101) for use with the installation tool.

2. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The support (2) is formed by longitudinal cutting of a cylinder on both sides, and the longitudinal cutting forms a first plane (201) and a second plane (202). The circumferential contour of the inner wall of the stepped hole matches the outer circumferential contour of the support (2), and the first plane (201) is in contact with the inner wall of the stepped hole, and the second plane (202) forms the exhaust channel (3) between the inner wall of the stepped hole and the second plane (202).

3. The anti-clogging and anti-fall-off exhaust plug structure according to claim 2, characterized in that, The first plane (201) and the second plane (202) are parallel.

4. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The first connecting part (22) is located in the middle of the end face of the support (2), and the groove (21) is located on both sides of the first connecting part (22).

5. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The connecting section (43) is cylindrical and has threads on its circumference for threaded connection with the first connecting part (22).

6. The anti-clogging and anti-fall-off exhaust plug structure according to claim 5, characterized in that, The plug section (41) is cylindrical, and the exhaust grooves (411) are evenly distributed along the circumference.

7. The anti-clogging and anti-fall-off exhaust plug structure according to claim 6, characterized in that, The neck segment (42) is cylindrical and its diameter is smaller than that of the plug segment (41) and the connecting segment (43).

8. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The support (2) has a second connecting part at the other end away from the first connecting part (22) and the groove (21).

9. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The width of the support (2) is greater than the width of the air plug (4).

10. The anti-clogging and anti-fall-off exhaust plug structure according to claim 1, characterized in that, The support (2) is made of steel; the air plug (4) is made of stainless steel.

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