Spiral circulating water cooling structure of high-pressure casting mold

Abstract

The utility model relates to the technical field of die-casting dies, in particular to a high-pressure casting die spiral circulating water cooling structure which comprises a sliding seat, a guide sliding block connected with the sliding seat in a sliding mode and a die detachably and fixedly connected with the guide sliding block. The cooling rod comprises a rod body and a sealing head integrally formed with the rod body, a water inlet channel penetrating through the rod body and the sealing head is formed in the cooling rod, a water outlet channel penetrating through the sealing head is formed in the sealing head, and an outer thread used for guiding cooling water is formed in the outer circle of the rod body. The water inlet channel and the water outlet channel are communicated with the cavity; according to the scheme, the technical problem that the cooling efficiency is low due to disordered flowing of cooling water in the high-pressure casting process can be solved.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to a spiral circulating water-cooling structure for high-pressure die-casting molds. Background Technology

[0002] Die casting is a metal forming process that uses high pressure to rapidly inject molten metal into a mold to create precise metal parts. In high-pressure casting, molten metal is injected into the mold at extremely high pressure (typically between 10 and 100 MPa). This process is suitable for manufacturing complex-shaped, thin-walled parts. Due to the high pressure and rapid cooling steps involved in the casting process, the castings typically have good surface finish and dimensional accuracy.

[0003] Rapid cooling methods for die-casting molds generally include water cooling or temperature control using heat-carrying oil. Water cooling involves creating water channels within the mold, allowing cooling water to flow and carry away heat. Water cooling is highly efficient and easy to control, making it the most commonly used cooling method for die-casting molds.

[0004] However, the existing technology has a technical problem: the flow of cooling water in the flow channel is usually disordered, which can easily lead to poor control of the temperature inside the mold. The root cause is that it is impossible to ensure that the cooling water that enters the flow channel first flows out of the flow channel in a timely manner. If the part of the cooling water that has not yet achieved heat exchange flows out of the flow channel first, while the cooling water that has fully absorbed the heat inside the mold remains in the mold, it will easily affect the cooling efficiency. As a result, problems such as sticking to the mold, scratches, no machining allowance after scratches, and loose internal structure of parts are likely to occur during the die casting process. Utility Model Content

[0005] This invention provides a spiral circulating water cooling structure for high-pressure casting molds, which can solve the technical problem of low cooling efficiency caused by disordered flow of cooling water during high-pressure casting.

[0006] This application provides the following technical solution:

[0007] A spiral circulating water-cooled structure for high-pressure casting mold includes a slide block, a guide block slidably connected to the slide block, and a mold detachably and fixedly connected to the guide block. A cavity is formed inside the mold, and a cooling rod is detachably and fixedly installed inside the cavity. The cooling rod includes a rod body and a sealing head integrally formed with the rod body. A water inlet channel is formed inside the cooling rod, penetrating the rod body and the sealing head. A water outlet channel is formed inside the sealing head, penetrating the sealing head. An external thread for guiding cooling water is formed on the outer circle of the rod body. Both the water inlet channel and the water outlet channel are connected to the cavity.

[0008] Beneficial effects:

[0009] 1. Improved Cooling Efficiency and Optimized Casting Quality: The external threads on the rod body form a helical channel within the cavity. This directional and unidirectional channel, comprised of the inlet channel, helical channel, and outlet channel, ensures orderly flow of cooling water. This design guarantees that the cooling water entering the channel first exchanges heat with the mold wall, and this heat-exchanged water flows out preferentially. Thus, the cooling water maintains a consistently high heat exchange capacity throughout the cooling process, avoiding uneven temperature distribution caused by cooling water stagnation within the channels. Therefore, this design not only improves cooling efficiency but also ensures a more uniform temperature distribution during the casting process, thereby enhancing the casting quality of the parts.

[0010] 2. Extended Cooling Time for Smooth Cooling: The spiral channel formed by the external threads on the rod and the rod body extends the residence time of the cooling water inside the mold. As the cooling water flows within the spiral channel, the contact area with the mold wall increases, prolonging the heat exchange time and resulting in a more thorough and gentle cooling process. Compared to straight cooling channels, the spiral channel better controls temperature changes in the mold, preventing problems such as part deformation or cracking caused by excessive temperature differences. This design not only improves the molding quality of the parts but also extends the mold's lifespan and reduces the scrap rate during production.

[0011] Furthermore, as an improvement, a thin-walled water groove is formed at the end of the rod away from the sealing head, which is recessed inward toward the sealing head. Several equally spaced drainage holes are arranged circumferentially in the water groove, and the drainage holes communicate with the cavity.

[0012] Beneficial effects: The water tank, acting as a transfer area between the inlet channel and the spiral channel, facilitates the transfer of cooling water. After entering the water tank from the inlet channel, the cooling water is evenly distributed into the spiral channel through the drainage holes, ensuring more uniform flow and pressure. Simultaneously, the addition of the water tank provides a buffer space for the cooling water, reducing the possibility of direct impact on the mold wall and preventing sudden local temperature changes caused by water flow impact. This buffering effect helps to further improve the stability and uniformity of the cooling process, ensuring a more reasonable temperature distribution in the mold, thereby improving the casting quality of the parts.

[0013] Furthermore, as an improvement, an installation groove is provided at the end of the sealing head away from the rod body, and an O-ring is embedded in the installation groove.

[0014] Beneficial effects: O-rings have good sealing performance and can effectively prevent cooling water from seeping through the gap between the cooling rod and the mold base, thereby avoiding the mixing of cooling water entering the water inlet channel with hot water flowing out of the water outlet channel, which would affect the cooling efficiency.

[0015] Furthermore, as an improvement, the mold includes a base and a mandrel passing through the center of the base, wherein the diameter of one end of the mandrel away from the base is larger than the diameter of the other end of the mandrel.

[0016] Beneficial effects: Limiting the mandrel diameter creates a step at the top of the mandrel that engages with the guide slider, significantly enhancing the overall stability of the mandrel structure. This method ensures a more secure fixation of the mandrel within the mold, effectively reducing displacement caused by vibration or external forces, guaranteeing the mandrel's precise position during the molding process, and contributing to consistent casting quality.

[0017] Furthermore, as an improvement, several mounting grooves are formed on the outer circumference of the mandrel near the base, and O-rings are embedded in the mounting grooves.

[0018] Beneficial effects: The addition of mounting groove 2 and O-ring seal helps to enhance the sealing performance between the spindle and the base, thereby enhancing the connection stability.

[0019] Furthermore, as an improvement, a mounting hole is fixedly provided on the side wall of the base, and a spare water inlet pipe communicating with the water inlet channel is fixedly installed in the mounting hole.

[0020] Beneficial effect: The function of the backup water inlet pipe is to enhance the flow of cooling water when necessary and ensure cooling efficiency. Attached Figure Description

[0021] Figure 1 This is an isometric view of the engine housing in Embodiment 1 of this utility model;

[0022] Figure 2 This is an isometric view of the spiral circulating water cooling structure of the high-pressure casting mold according to Embodiment 1 of this utility model;

[0023] Figure 3 for Figure 2 The right view;

[0024] Figure 4 for Figure 3 AA section view;

[0025] Figure 5 for Figure 4 An enlarged view of position B in the middle;

[0026] Figure 6 for Figure 4 An enlarged diagram of position C in the middle. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The markings in the accompanying drawings include: engine housing 1, through hole 101, slide 2, water inlet 201, water outlet 202, guide block 3, base 4, spindle 5, cooling rod 6, rod 601, sealing head 602, water inlet channel 603, water outlet channel 604, mounting hole 605, water outlet pipe 606, external thread 607, water groove 608, leakage hole 609, mounting groove one 610, and mounting groove two 611.

[0029] Example 1

[0030] The spiral circulating water cooling structure of the high-pressure casting mold is specifically applied to the through hole 101 at the end of the engine housing 1 as shown in the figure. The assembly relationship between the engine housing 1 and the mold is shown in the figure.

[0031] Combination Figures 2-6 As shown, the high-pressure casting mold spiral circulating water-cooled structure includes a slide block 2, a guide block 3, and a mold detachably fixed to the guide block 3 by screws. A groove is formed inside the slide block 2, and protrusions on both sides of the guide block 3 are embedded in the groove, allowing the guide block 3 to slide slidably connect with the slide block 2. In this embodiment, the guide block 3 is driven by a cylinder, and the sliding trajectory of the slide block 2 is a linear motion along the groove. The mold includes a base 4 and a mandrel 5 passing through the center of the base 4 to form a through hole 101 at the end of the engine housing 1. Figure 4 The diameter of the end of the mandrel 5 that contacts the engine housing 1 is larger than the diameter of the other end of the mandrel 5, so that the top of the mandrel 5 forms a step and is locked in place with the guide slider 3, thereby enhancing the overall stability of the mandrel 5 structure and helping to ensure the forming quality of the through hole 101 at the end of the engine housing 1. An inlet 201 and an outlet 202 are provided at the bottom of the base 4. A cavity is opened inside the mandrel 5, and a cooling rod 6 is detachably and fixedly installed inside the cavity. Specifically, the cooling rod 6 includes a rod body 601 and a sealing head 602 integrally formed with the rod body 601. A water inlet channel 603 is opened inside the cooling rod 6, penetrating the rod body 601 and the sealing head 602. A vertical pipe is connected to the inlet 201 and communicates with the water inlet channel 603. A water outlet channel 604 is opened inside the sealing head 602, penetrating the sealing head 602. The water outlet channel 604 includes a horizontal water outlet pipe 606, and a vertical pipe is connected to the outlet 202 and communicates with the water outlet channel 604. An external thread 607 for guiding cooling water is formed on the outer circumference of the rod 601, and the water inlet channel 603 extends upward to the top of the rod 601; combined with Figure 6 As shown, the top of the rod 601 is pressed against the spindle 5, and a concave thin-walled water groove 608 is opened in the middle of the top of the rod 601. Multiple equally spaced water leakage holes 609 are arranged circumferentially in the water groove 608. The water leakage holes 609 are connected to the circumferential cavity of the top external thread 607. The lower end of the external thread 607 is concave to form a water outlet area, and the water outlet channel 604 is connected to the water outlet area.

[0032] A mounting groove 610 is formed on the end of the sealing head 602 away from the rod 601, and a rubber O-ring is embedded in the mounting groove 610. A mounting hole 605 is also formed on the base 4, and a spare water inlet pipe is fixedly installed in the mounting hole 605, connecting to the water inlet channel 603. The function of this spare water inlet pipe is to enhance the flow of cooling water when necessary, ensuring cooling efficiency. Two mounting grooves 611 are formed on the outer circumference of the spindle 5 near the base 4, and O-rings are embedded in the mounting grooves 611.

[0033] The specific application process is as follows:

[0034] When cooling is required at the end of the engine housing 1, cooling water is injected into the cooling rod 6 through the inlet 201 and first flows into the inlet channel 603. The flow direction of the cooling water is shown by the arrow in the figure. Then, it flows out from the top outlet of the inlet channel 603 into the cavity in the water tank 608. Then, it flows out from the drain holes 609 around the water tank 608 into the spiral water channel formed by the external thread 607 of the rod 601 and the mandrel 5. Under the action of gravity, it accelerates to the bottom. Finally, the cooling water enters the outlet channel 604 located at the end of the spiral water channel, i.e., the bottom of the rod 601, and flows out from the outlet 202. During the entire flow process of the cooling water, a heat exchange process is carried out with the end of the engine housing 1, which enables the through hole 101 at the end of the engine housing 1 to be formed quickly and with better forming quality.

[0035] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A spiral circulating water-cooling structure for high-pressure casting molds, characterized in that: The device includes a slide block, a guide block slidably connected to the slide block, and a mold detachably and fixedly connected to the guide block. A cavity is formed in the mold, and a cooling rod is detachably and fixedly installed in the cavity. The cooling rod includes a rod body and a sealing head integrally formed with the rod body. A water inlet channel is formed in the cooling rod, penetrating the rod body and the sealing head. A water outlet channel is formed in the sealing head, penetrating the sealing head. An external thread for guiding cooling water is formed on the outer circle of the rod body. Both the water inlet channel and the water outlet channel are connected to the cavity.

2. The spiral circulating water cooling structure for high-pressure casting molds according to claim 1, characterized in that: A thin-walled water groove is formed at one end of the rod away from the sealing head, which is recessed inward toward the sealing head. Several equally spaced water leakage holes are arranged around the water groove, and the water leakage holes communicate with the cavity.

3. The spiral circulating water cooling structure for high-pressure casting molds according to claim 2, characterized in that: An installation groove is provided at the end of the sealing head away from the rod, and an O-ring is embedded in the installation groove.

4. The spiral circulating water cooling structure for high-pressure casting molds according to claim 3, characterized in that: The mold includes a base and a mandrel passing through the center of the base, wherein the diameter of one end of the mandrel away from the base is larger than the diameter of the other end of the mandrel.

5. The spiral circulating water cooling structure for high-pressure casting molds according to claim 4, characterized in that: Several mounting grooves are formed on the outer circumference of the mandrel near the base, and O-rings are embedded in the mounting grooves.

6. The spiral circulating water cooling structure for high-pressure casting molds according to claim 5, characterized in that: An installation hole is fixedly provided on the side wall of the base, and a spare water inlet pipe communicating with the water inlet channel is fixedly installed in the installation hole.

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