Water-cooled insert structure with exhaust function

Abstract

The utility model discloses a water -cooling insert block structure with exhaust function, including cooling insert block, water inlet pipe, water outlet pipe, the cooling insert block is provided with the cooling blind hole that extends from top to bottom in, the bottom surface of cooling insert block is the vault of type cavity, the water inlet pipe is from cooling insert block side wall and cooling blind hole intercommunication, be provided with an inner tube in the cooling blind hole, and the lower end of this inner tube has the interval with the hole bottom of cooling blind hole, the inner tube upper end and the connector of cooling blind hole mouth end fixed connection are connected, the water outlet pipe passes through the connector and is connected with the inner tube, and the inner tube and the inner wall between cooling blind hole have the water passage, the vault of type cavity of cooling insert block lower part is provided with the exhaust hole, is equipped with the exhaust plug of a plurality of porosities and is installed in the import of exhaust hole, and the outlet of exhaust hole is located in the recess that sets up of cooling insert block side wall, the recess extends to cooling insert block top for exhaust along side wall. This insert block structure can realize the collection of the function of cooling and exhaust.

Description

Technical Field

[0001] This utility model relates to the field of mold cooling technology, specifically to a water-cooled insert structure with venting function. Background Technology

[0002] In low-pressure casting, the design of the venting structure at the top of the casting is crucial for eliminating cavity gases and preventing porosity defects. The design of the venting structure at the top of the casting typically follows two paths: one is to directly install ejector pins or vent plugs at the highest point of the mold to allow gas to escape; the other is to use a riser design for high-point areas where shrinkage defects also exist, designing a riser at this location and then designing an ejector pin or vent plug on the riser. However, when the casting is constrained by special structural shapes or dimensional accuracy requirements and cannot have risers added, conventional techniques often turn to forced cooling solutions, i.e., water cooling or air cooling systems, to suppress shrinkage porosity.

[0003] For castings with dome structures, such as the top of a motorcycle cylinder head, the molten metal at the dome structure location is prone to shrinkage defects during solidification due to obstructed heat dissipation paths, which can lead to cracks, porosity, and other problems, severely damaging the mechanical properties of the casting. In response, the technical solution disclosed in CN221582015U, "Water-cooled Structure of Metal Casting Mold," is as follows: A water-cooled structure for a metal casting mold includes a side mold. The cavity wall of the side mold has a through hole. A water-cooling insert is placed in the through hole, which is a stepped hole. Both ends of the water-cooling insert have annular bosses. The annular bosses are fitted into the large-diameter section of the through hole via a heat-insulating sleeve, preventing the small-diameter section of the water-cooling insert from contacting the side mold. The inner wall of the heat-insulating sleeve has first flanges at both ends that contact the annular bosses. The outer wall of the heat-insulating sleeve has second flanges at both ends that contact the inner wall of the through hole. The axial end of the heat-insulating sleeve has a third flange that contacts the shoulder of the through hole. A blind hole is provided axially within the water-cooling insert. A water outlet pipe is fixedly connected to the water-cooling insert. The opening of the blind hole is sealed with a cap. An inlet pipe passes through the cap and is inserted into the blind hole. Multiple limiting protrusions on the inlet pipe contact the inner wall of the blind hole. The blind end of the blind hole is a quenching point, and a groove is provided at the quenching point. It utilizes internal circulating water cooling to cool the quenching area, effectively reducing the risk of shrinkage porosity. Moreover, through the setting of the heat insulation insert, the water-cooled insert is separated from the side mold, so that the water-cooled insert can only cool the quenching area and cannot remove the heat from the side mold. The dome position is the area where heat and gas are concentrated. The water cooling structure removes the heat from the dome position, but the gas in the dome position cannot be discharged. Poor exhaust will cause gas stagnation, resulting in defects such as porosity and under-casting, which seriously restricts the yield of castings. The technical solution disclosed in CN222492109U, titled "An Exhaust Insert for an Aluminum Alloy Die-casting Mold," is as follows: An exhaust insert for an aluminum alloy die-casting mold includes an insert body. The insert body has several first longitudinal exhaust pipes arranged vertically. These first longitudinal exhaust pipes penetrate the insert body vertically. The insert body also has several transverse exhaust pipes arranged horizontally. These transverse exhaust pipes penetrate the insert body horizontally. The transverse exhaust pipes intersect and overlap with at least one first longitudinal exhaust pipe. The insert body also has several second longitudinal exhaust pipes arranged vertically. The top ends of the second longitudinal exhaust pipes are connected to the transverse exhaust pipes. This design achieves exhaust through the first longitudinal, transverse, and second longitudinal exhaust pipes on the exhaust insert, avoiding air-stuffing defects. However, for the dome area, where heat is high, simply using the exhaust insert cannot quickly remove the heat, leading to delayed solidification at the dome of the casting, which in turn causes shrinkage porosity and other defects in the casting. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a water-cooled insert structure with venting function. This water-cooled insert structure with venting function is designed for the dome position of the casting and integrates venting and water-cooling functions on the insert. It has high cooling efficiency, can simultaneously vent, avoids air stagnation in the casting, is easy to maintain, and the vent plug is easy to replace after it becomes clogged.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A water-cooled insert structure with venting function includes a cooling insert, an inlet pipe, and an outlet pipe. The cooling insert has a cooling blind hole extending from top to bottom. The bottom surface of the cooling insert is a dome of the cavity. The inlet pipe communicates with the cooling blind hole from the side wall of the cooling insert. An inner tube is installed in the cooling blind hole. The lower end of the inner tube is spaced from the bottom of the cooling blind hole. The upper end of the inner tube is connected to the outlet of the cooling blind hole by an adapter. The outlet pipe communicates with the inner tube through the adapter. A water passage is provided between the inner tube and the inner wall of the cooling blind hole.

[0007] An exhaust hole is provided at the dome of the cavity at the lower part of the cooling insert. An exhaust plug with several pores is installed in the inlet of the exhaust hole. The outlet of the exhaust hole is located in a groove provided in the side wall of the cooling insert. The groove extends along the side wall to the top of the cooling insert for exhaust.

[0008] Preferably, the cooling blind hole is a stepped hole structure, which includes a large-diameter section and a small-diameter section connected together. The small-diameter section has a smaller diameter than the large-diameter section and extends towards the bottom of the cooling insert. The water inlet pipe is connected to the large-diameter section.

[0009] Preferably, the lower end of the adapter is provided with a plug-in portion, which is plugged into the large-diameter section of the cooling blind hole.

[0010] Preferably, the groove on the side wall of the cooling insert is attached to the side wall of the upper mold to form an exhaust channel.

[0011] Preferably, the side wall of the cooling insert is provided with a hanging platform structure, which is used to cooperate with the upper mold to restrict the downward movement of the cooling insert.

[0012] Preferably, the water inlet pipe is welded to the cooling insert, the inner pipe and the water outlet pipe are both welded to the adapter, and the adapter is welded to the cooling insert.

[0013] Preferably, the inlet pipe, inner pipe, and outlet pipe are all stainless steel pipes.

[0014] Preferably, the cooling insert is made of H13 mold steel.

[0015] Preferably, the adapter is made of 45 steel.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. For castings with domes, a water-cooled insert structure is set at the position of the dome of the casting. The bottom surface of the cooling insert is the dome of the cavity. The water-cooled insert structure is equipped with a circulating cooling component and an exhaust component. The circulating cooling component cools the entire cooling insert and removes the heat from the upper mold. The exhaust component exhausts the heat, thus realizing the combination of cooling and exhaust functions and solving the current problem of space competition between cooling and exhaust.

[0018] 2. Cooling water enters the water passage of the cooling blind hole through the water inlet pipe, and then flows out through the inner pipe and the water outlet pipe to cool the entire cooling insert, remove heat from the heat junction in time, and solve shrinkage defects.

[0019] 3. It is equipped with an exhaust plug with several holes, which allows air to be released through the exhaust plug, exhaust hole and groove, thus solving the problem of air trapping. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 for Figure 1 The main view.

[0022] Figure 3 for Figure 1 The left view.

[0023] Figure 4 for Figure 3 A sectional view of AA.

[0024] Figure 5 This is a cross-sectional view of the cooling insert.

[0025] Figure 6 for Figure 1 A diagram showing another location.

[0026] Figure 7 for Figure 6 A schematic diagram showing the fit between the engine and a motorcycle cylinder head.

[0027] Figure 8 This is a schematic diagram showing the fit of a motorcycle cylinder head.

[0028] Figure 9 This is a schematic diagram of the water-cooled insert structure with venting function of this utility model installed on the upper mold.

[0029] Figure 10 for Figure 9 A schematic diagram of another location after adding the pressure plate. Detailed Implementation

[0030] like Figure 1-10 As shown, a water-cooled insert structure with venting function includes a cooling insert 1, a water inlet pipe 2, and a water outlet pipe 7. The cooling insert 1 has a cooling blind hole 3 extending from top to bottom. The bottom surface of the cooling insert 1 is a dome 4 of a cavity. The water inlet pipe 2 communicates with the cooling blind hole 3 from the side wall of the cooling insert 1. An inner tube 6 is provided in the cooling blind hole 3. The lower end of the inner tube 6 is spaced from the bottom of the cooling blind hole 3. The upper end of the inner tube 6 is connected to the adapter 5 fixedly connected to the opening end of the cooling blind hole 3. The water outlet pipe 7 communicates with the inner tube 6 through the adapter 5. A water passage 3-1 is provided between the inner tube 6 and the inner wall of the cooling blind hole 3.

[0031] An exhaust hole is provided at the dome 4 of the cavity at the lower part of the cooling insert 1. An exhaust plug 11 with several pores is installed in the inlet of the exhaust hole. The outlet 9 of the exhaust hole is located in the groove 10 provided on the side wall of the cooling insert 1. The groove 10 extends along the side wall to the top of the cooling insert 1 for exhaust.

[0032] For castings 13 with a dome 12, such as motorcycle cylinder heads, a water-cooled insert structure is installed at the dome 12 position. The bottom surface of the cooling insert 1 is the dome of the cavity. The cooling insert is installed on the upper mold. The dome position is a heat concentration point and a gas concentration point. Cooling water enters the water passage of the cooling insert through the inlet pipe, and then exits through the inner pipe and outlet pipe to achieve circulating cooling, carrying away the heat of the cooling insert and the upper mold, thus solving shrinkage defects. At the same time, an exhaust structure is provided, and the gas is discharged outward through the exhaust hole and groove to avoid gas trapping defects. The cooling insert realizes the combination of cooling and exhaust functions, solving the current problem of space competition between cooling and exhaust.

[0033] Specifically, the exhaust plug is interference-fitted into the inlet of the exhaust port. When replacing it, a threaded hole is drilled in the exhaust plug, then a bolt is connected, and then a tool such as pliers is used to move the bolt outward to remove the exhaust plug for easy replacement.

[0034] In this specific embodiment, the cooling blind hole 3 is a stepped hole structure, which includes a large-diameter section 31 and a small-diameter section 32 connected together. The small-diameter section 32 has a smaller diameter than the large-diameter section 31 and extends towards the bottom of the cooling insert 1. The water inlet pipe 2 is connected to the large-diameter section 31. Cooling water enters the large-diameter section 31 of the cooling blind hole 3 through the water inlet pipe 2, and then enters the small-diameter section 32. The large-diameter section 31 acts as a buffer to reduce impact and vibration.

[0035] In this specific embodiment, the lower end of the adapter 5 is provided with a plug-in portion 51, which is plugged into the large-diameter section of the cooling blind hole 3. The plug-in portion 51 is inserted into the large-diameter section 31 of the cooling blind hole 3 for easy assembly.

[0036] In this specific embodiment, the groove 10 on the side wall of the cooling insert 1 abuts against the side wall of the upper mold to form an exhaust channel. The exhaust channel, formed by the groove and the side wall of the upper mold, avoids the difficulty of machining complex deep holes inside the insert, reduces processing costs, and facilitates cleaning. For ease of cleaning, the outlet of the exhaust hole can be configured to directly penetrate the cooling insert.

[0037] In this specific embodiment, the cooling insert 1 has a mounting structure 14 on its side wall, which cooperates with the upper mold to restrict the downward movement of the cooling insert 1. The mounting structure 14 provides mechanical limiting protection, effectively preventing the cooling insert 1 from moving downward and ensuring accurate positioning of the cavity surface. The mounting structure 14 is hung on the upper mold 15, and a pressure plate 16 is fixed above the upper mold by bolts. The pressure plate limits the cooling insert, preventing it from moving upward. The upper mold has a through hole for cooperating with the cooling insert. The cooling insert passes through the through hole, the mounting structure hangs on the upper mold, and the side wall of the cooling insert is in contact with the upper mold. During the cooling process, it can carry away the heat from the upper mold, thus cooling the upper mold.

[0038] In this specific embodiment, the water inlet pipe 2 is welded to the cooling insert 1, and both the inner pipe 6 and the water outlet pipe are welded to the adapter 5, which in turn is welded to the cooling insert 1. This fully welded connection method forms an integral sealed structure, avoiding the risk of leakage.

[0039] In this specific embodiment, the inlet pipe 2, inner pipe 6, and outlet pipe 7 are all stainless steel pipes. Stainless steel pipes have excellent corrosion resistance and thermal conductivity, maintaining the integrity of the pipeline under long-term contact with high-temperature cooling media and preventing rust products from clogging the flow channels.

[0040] In this specific embodiment, the cooling insert 1 is made of H13 mold steel. H13 mold steel has high red hardness and resistance to thermal fatigue, maintaining the structural stability of the insert under the high temperature and high pressure environment of the die casting process. The hardened layer formed after surface nitriding treatment effectively resists the erosion of molten aluminum, significantly extending the service life of the insert.

[0041] In this specific embodiment, the adapter 5 is made of 45 steel. After quenching and tempering, 45 steel has both good mechanical strength and machinability. Its moderate coefficient of thermal expansion matches that of H13 steel, reducing thermal stress concentration. The precision-machined adapter can ensure high-precision fit with each pipeline, while reducing the overall manufacturing cost.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A water-cooled insert structure with venting function, comprising a cooling insert (1), an inlet pipe (2), and an outlet pipe (7), wherein the cooling insert (1) is provided with a cooling blind hole (3) extending from top to bottom, and the bottom surface of the cooling insert (1) is a dome (4) of a cavity, characterized in that: The water inlet pipe (2) is connected to the cooling blind hole (3) from the side wall of the cooling insert (1). An inner pipe (6) is installed inside the cooling blind hole (3). The lower end of the inner pipe (6) is spaced from the bottom of the cooling blind hole (3). The upper end of the inner pipe (6) is connected to the adapter (5) which is fixedly connected to the opening end of the cooling blind hole (3). The water outlet pipe (7) is connected to the inner pipe (6) through the adapter (5). A water passage (3-1) is left between the inner pipe (6) and the inner wall of the cooling blind hole (3). An exhaust hole is provided at the dome (4) of the cavity at the lower part of the cooling insert (1). An exhaust plug (11) with several pores is installed in the inlet of the exhaust hole. The outlet (9) of the exhaust hole is located in the groove (10) provided on the side wall of the cooling insert (1). The groove (10) extends along the side wall to the top of the cooling insert (1) for exhaust.

2. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The cooling blind hole (3) is a stepped hole structure, which includes a large diameter section (31) and a small diameter section (32) connected together. The small diameter section (32) has a smaller diameter than the large diameter section (31) and extends to the bottom of the cooling insert (1). The water inlet pipe (2) is connected to the large diameter section (31).

3. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The lower end of the adapter (5) is provided with a plug-in part (51), which is plugged into the large diameter section (31) of the cooling blind hole (3).

4. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The groove (10) on the side wall of the cooling insert (1) is attached to the side wall of the upper mold to form an exhaust channel.

5. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The cooling insert (1) has a hanging platform structure (14) on its side wall, which is used to cooperate with the upper mold to restrict the downward movement of the cooling insert (1).

6. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The inlet pipe (2) is welded to the cooling insert (1), and the inner pipe (6) and the outlet pipe (7) are both welded to the adapter (5). The adapter (5) is welded to the cooling insert (1).

7. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The inlet pipe (2), inner pipe (6) and outlet pipe (7) are all stainless steel pipes.

8. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The cooling insert (1) is made of H13 mold steel.

9. The water-cooled insert structure with exhaust function as described in claim 1, characterized in that: The adapter (5) is made of 45 steel.

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