Cooling structure for a die-casting die and die-casting die

Abstract

This utility model relates to the technical field of cooling structure for die-casting molds, providing a cooling structure and die-casting mold for use in die-casting molds. The cooling structure includes: a cooling pipe completely embedded inside the die-casting mold with its first end connected to a cooling chamber; and a cooling channel opened within the mold frame with one end connected to an external water source. The second end of the cooling pipe is in fluid communication with the inner end of the cooling channel inside the mold. This solution adopts segmented built-in connecting fluid channels, eliminating through-type water pipes, avoiding vacuum leakage problems caused by pipe hole assembly tolerances, reducing maintenance costs, and featuring a compact cooling water circuit structure suitable for vacuum die-casting production conditions.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooling structure for die casting molds, specifically relating to a cooling structure for die casting molds and a die casting mold. Background Technology

[0002] Reference Figure 1 In existing die-casting mold cooling circuits, a water pipe 1 is often inserted inside the mold. One end of the water pipe 1 extends into the mold's cooling chamber, while the other end extends to the outside of the mold and connects to a water source. This is used to supply cooling water to the cooling chamber and facilitate its circulation. For die-casting molds requiring a vacuum process, the water pipe passes through the mold mounting hole 2 to connect the inside and outside of the mold. Therefore, a sealing ring 3 needs to be installed on the outer wall of the water pipe 1. The sealing ring is then compressed by a pressure block 4 to cause elastic deformation, sealing the gap between the water pipe 1 and the mold mounting hole to prevent air leakage and ensure the normal operation of the vacuum process.

[0003] However, after the structure is formed by the mold, the assembly tolerances of the water pipe 1 and the mold mounting hole 2, as well as the concentricity of the hole and pipe, are fixed. The vacuuming operation has extremely high requirements for the above two machining precisions. If the machining tolerances exceed the standard or the concentricity of the hole and pipe is not up to standard, the sealing ring 3 cannot form an effective seal, and problems such as air leakage and seal failure will occur, which will seriously affect the vacuuming effect of the mold. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cooling structure and a die casting mold for die casting molds, in view of the current state of the prior art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a cooling structure for a die-casting mold is proposed, wherein the die-casting mold is provided with a cooling chamber, and the cooling structure is used to provide a fluid channel for the cooling chamber. The cooling structure includes: A cooling pipe, completely embedded inside the die-casting mold, wherein the first end of the cooling pipe is in fluid communication with the cooling chamber; and A cooling channel is formed within the mold frame of the die-casting mold, with one end extending to the outside of the die-casting mold and connected to an external water source; wherein... The second end of the cooling pipe is in fluid communication with the other end of the cooling channel inside the die-casting mold.

[0006] The cooling structure for a die-casting mold described above further includes a connecting pipe; wherein the connecting pipe is located inside the die-casting mold, one end of the connecting pipe is in fluid communication with the second end of the cooling pipe, and the other end of the connecting pipe is in fluid communication with the cooling channel.

[0007] In the aforementioned cooling structure for a die-casting mold, the connecting pipe and the cooling pipe, as well as the connecting pipe and the cooling channel, are connected by quick-release couplings.

[0008] In the aforementioned cooling structure for die-casting molds, the quick-release connector is a snap-fit ​​or threaded connector.

[0009] In the aforementioned cooling structure for a die-casting mold, the connecting pipe is a rubber hose.

[0010] In the aforementioned cooling structure for a die-casting mold, the connecting pipe is an arc-shaped bend, the curvature of which is used to avoid the internal structure of the die-casting mold.

[0011] In the aforementioned cooling structure for a die-casting mold, the cooling channel is a straight through hole machined in the mold frame.

[0012] This utility model also addresses the above-mentioned technical problems by providing a die-casting mold, including the aforementioned cooling structure for a die-casting mold; wherein the die-casting mold further includes a core, and the cooling chamber is located within the core.

[0013] The aforementioned die-casting mold further includes a mold frame, the cooling pipe is embedded in the core, the cooling channel is opened in the mold frame, and the connecting pipe spans between the internal space of the die-casting mold and the mold frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) By using a cooling structure consisting of a cooling pipe that is fully embedded inside the die-casting mold and whose first end is connected to the cooling chamber, and a cooling channel that is opened inside the mold frame and whose one end extends to the outside of the mold to connect to the external water source, the cooling pipe and the inner end of the cooling channel are in fluid communication inside the mold, the problem of traditional cooling water pipes running through the inside and outside of the mold, assembly tolerance and concentricity deviation between the pipe body and the mold mounting hole, and sealing failure causing vacuum leakage is solved, eliminating the hidden danger of vacuum leakage, reducing the wear of sealing accessories, and reducing mold maintenance costs.

[0016] (2) By adding a connecting pipe inside the mold between the cooling pipe and the cooling channel, which is connected to the cooling pipe and the cooling channel at both ends respectively, the problem of insufficient space for direct connection between the cooling pipe and the cooling channel inside the mold and the difficulty of pipe assembly alignment is solved. The connecting pipe is used to adapt to the internal space of the mold, reduce the accuracy requirements of water circuit processing and assembly alignment, and improve the flexibility of cooling water circuit layout.

[0017] (3) By including the core and cooling structure, the cooling chamber is located inside the core of the die casting mold structure, which solves the problem that the cooling water channel in the core forming area is exposed and runs through the mold and the vacuum seal is difficult to guarantee. Two sets of cooling structures can be arranged inside a single core as water inlet and water outlet channels respectively, and together they form a complete built-in cooling circulation water channel, which improves the cooling uniformity of the casting forming area and stabilizes the mold vacuum production conditions. Attached Figure Description

[0018] Figure 1 This is a partial sectional view of a cooling structure installed in a die-casting mold in the prior art.

[0019] Figure 2 This is a perspective view of the die-casting mold structure of this application.

[0020] Figure 3 yes Figure 2 Floor plan.

[0021] Figure 4 yes Figure 3 Sectional view at point AA.

[0022] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle.

[0023] Figure 6 It is a 3D view of the cooling pipes, connecting pipes, and quick-release connectors connected together.

[0024] In the diagram: 1. Water pipe; 2. Mounting hole; 3. Sealing ring; 4. Pressure block; 100. Cooling structure; 110. Cooling pipe; 120. Cooling channel; 130. Connecting pipe; 140. Quick-release connector. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] This embodiment discloses a cooling structure 100 for die-casting molds. The cooling structure 100 is adapted to the cooling circulation system of die-casting molds with vacuuming process. It can effectively solve the technical defects of the existing pipe-type cooling water circuit, which is affected by the assembly tolerance and the concentricity deviation of the hole pipe due to the water pipe passing through the inside and outside of the mold, resulting in the failure of the sealing ring and air leakage during vacuuming. It has the advantages of no leakage channel, low operation and maintenance cost and stable vacuuming condition. It can be widely adapted to various die-casting molds that require vacuuming.

[0028] Specifically, refer to the appendix Figures 2 to 6 The cooling structure 100 includes a cooling pipe 110 and a cooling channel 120.

[0029] The cooling pipe 110 is completely embedded inside the die-casting mold, entirely embedded in the relevant structure of the mold cavity, with no pipe section protruding from the outer wall of the mold. In one embodiment, the cooling pipe 110 is a hollow cylindrical pipe, and the material, wall thickness, and heat exchange substrate of the pipe are consistent with those of the existing die-casting mold cooling pipe 110, retaining the original pipe material's basic characteristics of high temperature resistance, high pressure resistance, and excellent thermal conductivity. There is no need to replace it with new pipe material, and no additional cost will be incurred in purchasing raw materials for the mold.

[0030] Of course, in order to adapt to the internal structure of the die-casting mold, the cooling water pipe can also be designed into other different shapes. When using it, you only need to make the cooling pipe 110 completely embedded inside the die-casting mold.

[0031] The first end of the cooling pipe 110 extends into the core and forms a fluid connection with the cooling chamber inside the core. Cooling water can be sent into the cooling chamber through the cooling pipe 110, forming part of the cooling circuit for heat exchange in the core molding area.

[0032] The cooling channel 120 is directly opened inside the mold frame of the die-casting mold. The cooling channel 120 is a through-hole structure integrally formed by the mold frame. One end of the cooling channel 120 extends outward to the outer end face of the die-casting mold for connecting to an external water source to realize the input and return of cooling water.

[0033] The second end of the cooling pipe 110, which is away from the cooling chamber, and the other end of the cooling channel 120, which is located inside the mold, are connected in a fluid manner inside the die-casting mold cavity. The cooling water can complete the medium transfer between the cooling pipe 110 and the cooling channel 120 inside the mold, without forming any pipe gaps that run through the inside and outside of the mold.

[0034] The cooling structure 100 in this solution includes at least two fluid passages. The first passage is a cooling pipe 110, which is completely embedded inside the die-casting mold and has one end in fluid communication with the cooling chamber. The second passage is a cooling channel 120 opened on the die-casting mold frame. One end of the cooling channel 120 is connected to the cooling pipe 110, and the other end extends to the outside of the die-casting mold.

[0035] Based on the structural characteristics of the two-section built-in docking fluid passage, the entire cooling water circuit has only one channel, the cooling flow channel 120, exposed and connected to the external water source. The cooling pipe 110 is completely enclosed inside the mold. There is no assembly gap formed by the water pipe penetrating the mold wall thickness in the traditional solution. This completely eliminates the air leakage risk of the mold cavity communicating with the outside air through the pipe assembly gap, and stably ensures that the vacuum degree of the die casting mold vacuuming process meets the standard.

[0036] In one preferred embodiment, the cooling structure 100 is provided with an independent connecting pipe 130 as an intermediate transition fluid component.

[0037] Specifically, the connecting pipe 130 is arranged in the internal cavity space of the die-casting mold. One end of the connecting pipe 130 is connected to the second end of the cooling pipe 110, and the other end is connected to the inner end of the cooling channel 120. The connecting pipe 130 enables the medium to be connected between the two water channels of the cooling pipe 110 and the cooling channel 120. The independent pipe fitting is adapted to the complex spatial layout inside the mold, making up for the difference in docking distance caused by the machining and positioning deviation of the cooling pipe 110 and the cooling channel 120, and improving the flexibility of the water channel layout.

[0038] Furthermore, quick-release connectors 140 are installed at the docking ports of the connecting pipe 130 and the cooling pipe 110, as well as at the docking port of the connecting pipe 130 and the cooling channel 120, to achieve sealed connection.

[0039] The quick-release connector 140 enables rapid disassembly and assembly of pipelines. When repairing molds or cleaning water blockages, it is not necessary to disassemble the entire mold. Each section of fluid pipeline can be separated using only the quick-release connector 140, which greatly improves the efficiency of mold water circuit maintenance. The connector is easy to disassemble and assemble, and the pipeline interface can be sealed without additional sealing gaskets. Under long-term circulating water conditions, it is not easy for the interface to leak.

[0040] In one embodiment of this solution, the quick-release connector 140 is a snap-fit ​​connector, which achieves sealed connection of the pipe port by snap-fit ​​clamping. Disassembly and assembly do not require tools, and a single person can complete the pipe disassembly and assembly. In another alternative embodiment, the quick-release connector 140 adopts a threaded connector, which improves the sealing and pressure resistance of the interface by tightening the thread, and is suitable for high flow and high water pressure cooling water circuit conditions. The two connector types can be flexibly selected according to the cooling flow requirements of the mold, and the structure has stronger adaptability.

[0041] Preferably, the connecting pipe 130 in this solution is made of rubber hose. Rubber hose has good deformation capacity, which can buffer the pipe tension caused by the small displacement between the core and the mold frame during the mold closing and opening process, and avoid cracking and water leakage at the joint of rigid pipes; at the same time, rubber hose has a certain shock absorption and noise reduction effect, which can reduce pipe vibration and abnormal noise when cooling water flows at high speed, and improve the stability of mold operation.

[0042] In another alternative embodiment, the connecting pipe 130 is processed into an arc-shaped bend structure. The curvature of the bend is customized according to the arrangement dimensions of the core, ejector pin, slider and other components inside the die-casting mold. The arc-shaped bend structure accurately avoids various metal structural parts inside the mold, avoiding interference and collision with the mold's internal parts during pipe assembly. It makes full use of the narrow assembly space inside the mold and is suitable for multi-cavity die-casting molds with complex structures.

[0043] In this design, the cooling channel 120 is a through-hole structure directly machined from the mold frame body, preferably a straight through-hole. The integrally machined cooling channel 120 has no assembly seams, strong water flow and pressure resistance, and is not prone to leakage; the straight cooling channel 120 has simple processing steps and low production cost.

[0044] This solution also discloses a die-casting mold equipped with the cooling structure 100 described in any of the above embodiments. The die-casting mold comprises two main components: a core and a mold frame. A cooling chamber is provided inside the core for cooling the forming area of ​​the casting. Of course, the die-casting mold also includes other known structures such as an ejection mechanism, a fixed mold, and a moving mold.

[0045] The cooling pipe 110 is integrally embedded and fixed inside the core, and the cooling channel 120 is integrally machined inside the mold frame. The connecting pipe 130 spans between the internal space of the die-casting mold and the mold frame, connecting the cooling pipe 110 inside the core and the cooling channel 120 inside the mold frame. Two sets of the above-mentioned cooling structures 100 can be arranged inside the same core. The two sets of cooling structures 100 serve as the water inlet and water outlet channels, respectively, working together to form a complete built-in cooling circulation water circuit.

[0046] In this solution, the cooling pipe 110 is integrated inside the die-casting mold, eliminating the need for a through-type water pipe structure that runs through the inside and outside of the mold. This completely avoids the problems of assembly tolerance and concentricity deviation between the water pipe and the mold mounting hole, and prevents the formation of a leakage channel connecting the inside and outside of the mold. This eliminates the problem of vacuum leakage caused by insufficient machining accuracy from the root, and continuously ensures the stability of the mold vacuuming operation.

[0047] Meanwhile, this solution adopts a segmented built-in water circuit combined with a quick-release connector 140 and a flexible connecting pipe 130. The water circuit is easy to disassemble and maintain, and can be adapted to die-casting molds with different internal structures. It has low processing difficulty and simple assembly process. The cooling water circuit has good pressure bearing and sealing performance. There is no risk of water leakage or air leakage during long-term circulation use, which can meet the needs of continuous operation of large-scale die-casting production.

[0048] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A cooling structure for a die casting mold, on which a cooling chamber is provided, for providing a fluid passage for the cooling chamber, characterized in that, The cooling structure includes: A cooling pipe, completely embedded inside the die-casting mold, wherein the first end of the cooling pipe is in fluid communication with the cooling chamber; and A cooling channel is formed within the mold frame of the die-casting mold, with one end extending to the outside of the die-casting mold and connected to an external water source; wherein... The second end of the cooling pipe is in fluid communication with the other end of the cooling channel inside the die-casting mold.

2. A cooling structure for a die-casting mold according to claim 1, wherein It also includes a connecting pipe; wherein the connecting pipe is located inside the die-casting mold, one end of the connecting pipe is in fluid communication with the second end of the cooling pipe, and the other end of the connecting pipe is in fluid communication with the cooling channel.

3. A cooling structure for a die-casting mold according to claim 2, wherein The connecting pipe and the cooling pipe, as well as the connecting pipe and the cooling channel, are connected by quick-release connectors.

4. A cooling structure for a die-casting mold according to claim 3, wherein The quick-release connector is a snap-on or threaded connector.

5. A cooling structure for a die-casting mold according to claim 2, wherein The connecting pipe is a rubber hose.

6. A cooling structure for a die-casting mold according to claim 2, wherein The connecting pipe is an arc-shaped bend, the curvature of which is used to avoid the internal structure of the die-casting mold.

7. A cooling structure for a die-casting mold according to claim 2, wherein The cooling channel is a straight through hole machined in the mold frame.

8. A die-casting mold characterized by comprising: The invention includes a cooling structure for a die-casting mold as described in any one of claims 2 to 7; wherein the die-casting mold further includes a core, and the cooling chamber is located within the core.

9. A die casting mould as claimed in claim 8, characterised in that It also includes a mold frame, the cooling pipe is embedded in the core, the cooling channel is opened in the mold frame, and the connecting pipe spans between the internal space of the die-casting mold and the mold frame.

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