High-pressure point cold die-casting die structure

Abstract

A high-pressure point cold die-casting die structure comprises a die body, a cooling cylinder, a conveying pipe, a drainage cylinder sleeve and a guide head. The mold body is provided with a containing channel, the cooling cylinder is installed in the containing channel, and a first drainage channel, a second drainage channel, a third drainage channel, a first communication channel, a second communication channel, a third communication channel and a sliding channel are arranged in the cooling cylinder. The utility model provides the high-pressure point cold die-casting die structure according to the content, and solves the problems that the high-pressure point cold die-casting die structure in the prior art is fixed and unique in cooling efficiency, cannot carry out point cooling on die castings with different thicknesses and large parts, and is low in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting mold cooling, in particular to a high-pressure point-cooling die-casting mold structure. Background Technique

[0002] A die-casting mold refers to a tool that can make molten metal flow into a cavity with a specific shape and cool and solidify into a workpiece with a specific shape and size. The thicknesses of different parts of the die-cast workpieces produced now are different, and shrinkage cavities are formed inside the workpieces due to the cooling efficiency of the thicker parts not meeting the requirements. Therefore, a high-pressure point-cooling structure needs to be adopted to accelerate the cooling efficiency of the thick and large parts.

[0003] However, for the high-pressure point-cooling die-casting mold structure in the prior art, its cooling efficiency is fixed and unique, and it cannot perform point cooling on die-castings with thick and large parts of different thicknesses, resulting in low versatility. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-pressure point-cooling die-casting mold structure, which solves the problems of the high-pressure point-cooling die-casting mold structure in the prior art, that is, its cooling efficiency is fixed and unique, it cannot perform point cooling on die-castings with thick and large parts of different thicknesses, and the versatility is low.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A high-pressure point-cooling die-casting mold structure includes a mold body, a cooling cylinder, a delivery pipe, a drainage barrel sleeve and a guide head;

[0007] The mold body is provided with a placement channel, the cooling cylinder is installed in the placement channel, and the inside of the cooling cylinder is provided with a first drainage channel, a second drainage channel, a third drainage channel, a first communication channel, a second communication channel, a third communication channel and a sliding channel;

[0008] The first drainage channel is communicated with the sliding channel through the first communication channel, the second drainage channel is communicated with the sliding channel through the second communication channel, the third drainage channel is communicated with the sliding channel through the third communication channel, the first communication channel is located in front of the second communication channel, and the second communication channel is located in front of the third communication channel;

[0009] The delivery pipe is slidably installed in the sliding channel in the front-back direction, the front end of the delivery pipe is communicated with the sliding channel, the rear end of the delivery pipe passes through the drainage barrel sleeve and protrudes from the rear end of the drainage barrel sleeve, the rear end of the delivery pipe is used to connect an external water supply device, and the outer wall of the delivery pipe can block the first communication channel, the second communication channel or the third communication channel;

[0010] The guiding head is installed at the front end of the cooling cylinder body, the drain cylinder sleeve is installed at the rear end of the cooling cylinder body, the drain cylinder sleeve is provided with a drain pipe, and the drain pipe is communicated with the first drain channel, the second drain channel and the third drain channel respectively.

[0011] Furthermore, the sliding channel is located in the middle of the cooling cylinder body, the first drain channel, the second drain channel and the third drain channel are respectively located on the outer periphery of the sliding channel, and the first drain channel, the second drain channel and the third drain channel are evenly spaced along the circumferential direction of the cooling cylinder body.

[0012] Specifically, the number of the first drain channels, the second drain channels and the third drain channels is two, and the two first drain channels are symmetrically arranged along the sliding channel, the two second drain channels are symmetrically arranged along the sliding channel, and the two third drain channels are symmetrically arranged along the sliding channel.

[0013] Preferably, the inner wall of the sliding channel is provided with a grading adjustment groove, the outer periphery of the conveying pipe is provided with a guiding block, and the guiding block can move along the length direction of the grading adjustment groove.

[0014] In some embodiments, the grading adjustment groove includes a first sliding section, a second sliding section, a third sliding section, a first rotating section and a second rotating section;

[0015] The first sliding section, the second sliding section and the third sliding section are arranged along the length direction of the cooling cylinder body, and the first rotating section and the second rotating section are arranged along the circumferential direction of the cooling cylinder body;

[0016] One end of the first rotating section is connected to the rear end of the first sliding section, the other end of the first rotating section is connected to the front end of the second sliding section, one end of the second rotating section is connected to the rear end of the second sliding section, and the second rotating section is connected to the front end of the third sliding section.

[0017] Furthermore, the inner wall of the conveying pipe is provided with a plurality of guiding convex strips, the plurality of guiding convex strips are evenly spaced along the length direction of the conveying pipe, and the plurality of guiding convex strips are evenly spaced along the circumferential direction of the conveying pipe.

[0018] Specifically, the drain cylinder sleeve is provided with a first thread, and the outer periphery of the rear end of the cooling cylinder sleeve is provided with a second thread, and the second thread is adapted to the first thread.

[0019] Preferably, the drain tube sleeve is provided with a first installation groove, which is located at the rear side of the first thread and around the first drainage channel, the second drainage channel, and the third drainage channel. The first installation groove is used for placing a sealing ring.

[0020] In some embodiments, a through hole is provided at the rear end of the drain tube sleeve. The rear end of the delivery pipe is installed in the through hole, and a second installation groove is provided on the inner wall of the through hole. The second installation groove is used for placing a sealing ring.

[0021] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0022] Through the mold body, the cooling cylinder, the first drainage channel, the second drainage channel, the third drainage channel, the first communication channel, the second communication channel, the third communication channel, the sliding channel, the delivery pipe, the drain tube sleeve, and the guide head, the delivery pipe can move back and forth in the sliding channel to adjust the cooling efficiency. Users can select the cooling mode according to the thickness of the thick and large parts of the die-cast workpiece, avoiding the phenomenon of over-cooling or under-cooling, and being applicable to point cooling of die-cast workpieces of different sizes and models, achieving the effect of improving the structural versatility of the high-pressure point-cooling die-casting mold. Description of the Drawings

[0023] Figure 1 is a structural schematic diagram of the high-pressure point-cooling die-casting mold structure of one embodiment of the present invention;

[0024] Figure 2 is a structural schematic diagram of the first drainage channel, the second drainage channel, and the third drainage channel of one embodiment of the present invention;

[0025] Figure 3 is a structural schematic diagram of the hierarchical adjustment groove of one embodiment of the present invention;

[0026] Figure 4 is a structural schematic diagram of the guide block and the diversion rib of one embodiment of the present invention;

[0027] Figure 5 is a structural schematic diagram of the first installation groove of one embodiment of the present invention;

[0028] Figure 6 is a structural schematic diagram of the second installation groove of one embodiment of the present invention;

[0029] Wherein: mold body 1, placement channel 11, cooling cylinder 2, first drainage channel 21, second drainage channel 22, third drainage channel 23, first communication channel 24, second communication channel 25, third communication channel 26, sliding channel 27, first sliding section 281, second sliding section 282, third sliding section 283, first rotating section 284, second rotating section 285, conveying pipe 3, guiding block 31, guiding convex strip 32, drainage cylinder sleeve 4, drain pipe 41, first installation groove 42, through hole 43, second installation groove 431, guiding head 5. Specific Embodiment

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe the features, without order or weight. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is more than two.

[0032] In an embodiment of the present invention, as Figures 1-6As shown in the figure, a high-pressure point-cooling die-casting mold structure includes a mold body 1, a cooling cylinder 2, a delivery pipe 3, a drain cylinder sleeve 4, and a guide head 5. The mold body 1 is provided with a placement channel 11, and the cooling cylinder 2 is installed in the placement channel 11. The interior of the cooling cylinder 2 is provided with a first drain channel 21, a second drain channel 22, a third drain channel 23, a first communication channel 24, a second communication channel 25, a third communication channel 26, and a sliding channel 27. The first drain channel 21 communicates with the sliding channel 27 through the first communication channel 24, the second drain channel 22 communicates with the sliding channel 27 through the second communication channel 25, and the third drain channel 23 communicates with the sliding channel 27 through the third communication channel 26. The first communication channel 24 is located in front of the second communication channel 25, and the second communication channel 25 is located in front of the third communication channel 26. The delivery pipe 3 is slidably installed in the sliding channel 27 in the front-back direction. The front end of the delivery pipe 3 communicates with the sliding channel 27, and the rear end of the delivery pipe 3 passes through the drain cylinder sleeve 4 and protrudes from the rear end of the drain cylinder sleeve 4. The rear end of the delivery pipe 3 is used to connect to an external water supply device, and the outer wall of the delivery pipe 3 can block the first communication channel 24, the second communication channel 25, or the third communication channel 26. The guide head 5 is installed at the front end of the cooling cylinder 2, and the drain cylinder sleeve 4 is installed at the rear end of the cooling cylinder 2. The drain cylinder sleeve 4 is provided with a drain pipe 41, and the drain pipe 41 communicates with the first drain channel 21, the second drain channel 22, and the third drain channel 23 respectively. In this embodiment, during installation, the guide head 5 is installed at the front end of the cooling cylinder 2, the drain cylinder sleeve 4 is installed at the rear end of the cooling cylinder 2, and the delivery pipe 3 is installed inside the cooling cylinder 2 so that the delivery pipe 3 can slide back and forth in the sliding channel 27, and the rear end of the delivery pipe 3 passes through the rear end of the drain cylinder sleeve 4 and protrudes outside it, thus facilitating the connection of the rear end of the delivery pipe 3 to an external water supply device. Specifically, the outer wall of the delivery pipe 3 fits against the inner wall of the sliding channel 27. That is, when the water outlet at the front end of the delivery pipe 3 is located in front of the first communication channel 24, the outer wall of the delivery pipe 3 blocks the first communication channel 24, the second communication channel 25, and the third communication channel 26, and the sliding channel 27 cannot communicate with the first drain channel 21, the second drain channel 22, and the third drain channel 23. When the water outlet at the front end of the delivery pipe 3 is located between the first communication channel 24 and the second communication channel 25, the outer wall of the delivery pipe 3 blocks the second communication channel 25 and the third communication channel 26. At this time, the sliding channel 27 communicates with the first drain channel 21 through the first communication channel 24, and the sliding channel 27 cannot communicate with the second drain channel 22 and the third drain channel 23.When the water outlet at the front end of the conveying pipe 3 is located between the second communication channel 25 and the third communication channel 26, the outer wall of the conveying pipe 3 blocks the third communication channel 26. At this time, the sliding channel 27 is communicated with the first drainage channel 21 through the first communication channel 24, and the sliding channel 27 is communicated with the second drainage channel 22 through the second communication channel 25, while the sliding channel 27 cannot be communicated with the third drainage channel 23. When the water outlet at the front end of the conveying pipe 3 is located behind the third communication channel 26, the sliding channel 27 is communicated with the first drainage channel 21 through the first communication channel 24, the sliding channel 27 is communicated with the second drainage channel 22 through the second communication channel 25, and the sliding channel 27 is communicated with the third drainage channel 23 through the third communication channel 26. Thus, the cooling efficiency can be adjusted through different communication methods. During operation, after adjusting the position of the water outlet at the front end of the conveying pipe 3 according to the cooling efficiency, the cooling cylinder 2 is inserted into the placement channel 11 and close to the thicker part of the die-cast workpiece. The arc surface at the front end of the guide head 5 can facilitate the smooth movement of the cooling cylinder 2 and prevent jamming or stopping. After the cooling cylinder 2 is placed in place, the external water supply device conveys high-pressure cooling water to the conveying pipe 3. The high-pressure cooling water is conveyed from the rear end of the conveying pipe 3 to the water outlet at the front end of the conveying pipe 3, and then the high-pressure cooling water enters the sliding channel 27. If the water outlet at the front end of the conveying pipe 3 is located behind the third communication channel 26, the high-pressure cooling water enters the first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 through the first communication channel 24, the second communication channel 25, and the third communication channel 26 respectively. The high-pressure cooling water absorbs the heat near the thicker part of the die-cast workpiece through heat transfer, enabling the thicker part to be quickly cooled, and the water that absorbs the heat converges into the drainage cylinder sleeve 4 and is discharged from the drain pipe 41. Through the mold body 1, the cooling cylinder 2, the first drainage channel 21, the second drainage channel 22, the third drainage channel 23, the first communication channel 24, the second communication channel 25, the third communication channel 26, the sliding channel 27, the conveying pipe 3, the drainage cylinder sleeve 4, and the guide head 5 in this application, the conveying pipe 3 can move back and forth in the sliding channel 27 to adjust the cooling efficiency. Users can select the cooling mode according to the thickness of the thick and large part of the die-cast workpiece, avoiding the phenomenon of over-cooling or under-cooling, and being applicable to point cooling of die-cast workpieces of different sizes and models, achieving the effect of improving the structural versatility of the high-pressure point-cooling die-casting mold.

[0033] As Figure 2As shown, the sliding channel 27 is located in the middle of the cooling cylinder 2. The first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 are respectively located on the outer periphery of the sliding channel 27, and the first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 are evenly spaced along the circumferential direction of the cooling cylinder 2. In this embodiment, the sliding channel 27 is arranged at the center inside the cooling cylinder 2. The 2, the first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 are respectively located on the outer periphery of the sliding channel 27, and the first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 are evenly spaced along the circumferential direction of the cooling cylinder 2. Through the above arrangement, it is beneficial to improve the space utilization rate inside the cooling cylinder 2.

[0034] As Figure 2 shown, the number of the first drainage channel 21, the second drainage channel 22, and the third drainage channel 23 is two, and the two first drainage channels 21 are symmetrically arranged along the sliding channel 27, the two second drainage channels 22 are symmetrically arranged along the sliding channel 27, and the two third drainage channels 23 are symmetrically arranged along the sliding channel 27. In this embodiment, the number of the first communication channel 24, the second communication channel 25, and the third communication channel 26 is two respectively. Specifically, the two first communication channels 24 are symmetrically arranged along the sliding channel 27, the two second communication channels 25 are symmetrically arranged along the sliding channel 27, and the two third communication channels 26 are symmetrically arranged along the sliding channel 27. By arranging the two first drainage channels 21, the second drainage channel 22, and the third drainage channel 23, the cooling efficiency is further improved.

[0035] As Figure 3 shown, the inner wall of the sliding channel 27 is provided with a grading adjustment groove, and a guide block 31 is arranged on the outer periphery of the conveying pipe 3. The guide block 31 can move along the length direction of the grading adjustment groove. In this embodiment, the number of the guide block 31 and the grading adjustment groove is two respectively. The two guide blocks 31 are symmetrically arranged, and the two grading adjustment grooves are arranged symmetrically. When it is necessary to adjust the cooling efficiency, the guide block 31 is made to move along the length direction of the grading adjustment groove, so as to facilitate adjusting the required cooling mode.

[0036] As Figure 3As shown, the stepped adjustment groove includes a first sliding section 281, a second sliding section 282, a third sliding section 283, a first rotating section 284, and a second rotating section 285. The first sliding section 281, the second sliding section 282, and the third sliding section 283 are arranged along the length direction of the cooling cylinder 2, and the first rotating section 284 and the second rotating section 258 are arranged along the circumferential direction of the cooling cylinder 2. One end of the first rotating section 284 is connected to the rear end of the first sliding section 281, the other end of the first rotating section 281 is connected to the front end of the second sliding section 282, one end of the second rotating section 285 is connected to the rear end of the second sliding section 282, and the second rotating section 285 is connected to the front end of the third sliding section 283. In this embodiment, the rear end of the first sliding section 281 and the front end of the second sliding section 282 are on the same horizontal plane, the rear end of the second sliding section 282 and the front end of the third sliding section 282 are on the same horizontal plane. When the guiding block 31 is located at the front end of the first sliding section 281, the outer wall of the conveying pipe 3 blocks the first communication channel 24, the second communication channel 25, and the third communication channel 26 at this time. When the guiding block 31 is located at the rear end of the first sliding section 281, the outer wall of the conveying pipe 3 blocks the second communication channel 25 and the third communication channel 26 at this time. When the guiding block 31 is located at the rear end of the second sliding section 282, the outer wall of the conveying pipe 3 blocks the third communication channel 26 at this time. When the guiding block 31 is located at the rear end of the third sliding section 283, the third drainage channel 23 communicates with the sliding channel 27 at this time. Preferably, in order to prevent the guiding block 31 from moving forward under the action of water flow, after adjusting the gear position, the guiding block 31 can be placed on the first rotating section 284 or the second rotating section 258.

[0037] As Figure 3 shown, a plurality of flow guiding ridges 32 are provided on the inner wall of the conveying pipe 3. The plurality of flow guiding ridges 32 are arranged at equal intervals along the length direction of the conveying pipe 3 and are arranged at equal intervals along the circumferential direction of the conveying pipe 3. In this embodiment, a plurality of the flow guiding ridges 32 are provided on the inner wall of the conveying pipe 3. The plurality of flow guiding ridges 32 are arranged at equal intervals along the length direction of the conveying pipe 3, the plurality of flow guiding ridges 32 are arranged at equal intervals along the circumferential direction of the conveying pipe 3, and the flow guiding ridges 32 are inclined, thus forming a spiral conveying structure, which is beneficial to improving the fluidity of the high-pressure cooling water and further improving the conveying efficiency.

[0038] As Figure 1 and Figures 5-6As shown, the drain cylinder sleeve 4 is provided with a first thread, and the outer periphery of the rear end of the cooling cylinder sleeve 2 is provided with a second thread, and the second thread is adapted to the first thread. In this embodiment, the drain cylinder sleeve 4 is installed at the rear end of the cooling cylinder body 2 by means of threaded connection, specifically, the first thread and the second thread are cooperatively installed, which is convenient and fast.

[0039] As Figure 1 and Figures 5-6 shown, the drain cylinder sleeve 4 is provided with a first installation groove 42, the first installation groove 42 is located at the rear side of the first thread, and the first installation groove 42 is located on the outer periphery of the first drain channel 21, the second drain channel 22 and the third drain channel 23, and the first installation groove 42 is used for placing a sealing ring. In this embodiment, the drain cylinder sleeve 4 is provided with the first installation groove 42, and a sealing ring is installed in the first installation groove 42, so as to prevent the water discharged from the first drain channel 21, the second drain channel 22 and the third drain channel 23 from leaking out from the threaded installation part of the drain cylinder sleeve 4 and the cooling cylinder body 2, achieving the effect of improving the water tightness of the high-pressure point cold die-casting mold structure.

[0040] As Figure 1 and Figures 5-6 shown, the rear end of the drain cylinder sleeve 4 is provided with a through hole 43, the rear end of the conveying pipe 3 is installed in the through hole 43, and the inner wall of the through hole 43 is provided with a second installation groove 431, and the second installation groove 431 is used for placing a sealing ring. In this embodiment, the rear end of the conveying pipe 3 specifically protrudes from the rear side of the drain cylinder sleeve 4 through the through hole 43, and the inner wall of the through hole 43 is provided with the second installation groove 431, and a sealing ring is placed in the second installation groove 431, so as to prevent the water discharged from the first drain channel 21, the second drain channel 22 and the third drain channel 23 from leaking out from the gap of the through hole 43, achieving the effect of improving the water tightness of the high-pressure point cold die-casting mold structure.

[0041] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high-pressure point cold die-casting mold structure, characterized in that: It includes a mold body, a cooling cylinder, a delivery pipe, a drain cylinder sleeve and a guide head; The mold body is provided with a placement channel, the cooling cylinder is installed in the placement channel, and the interior of the cooling cylinder is provided with a first drain channel, a second drain channel, a third drain channel, a first communication channel, a second communication channel, a third communication channel and a sliding channel; The first drain channel communicates with the sliding channel through the first communication channel, the second drain channel communicates with the sliding channel through the second communication channel, the third drain channel communicates with the sliding channel through the third communication channel, the first communication channel is located in front of the second communication channel, and the second communication channel is located in front of the third communication channel; The delivery pipe is slidably installed back and forth in the sliding channel, the front end of the delivery pipe communicates with the sliding channel, the rear end of the delivery pipe passes through the drain cylinder sleeve and protrudes from the rear end of the drain cylinder sleeve, the rear end of the delivery pipe is used to connect an external water supply device, and the outer wall of the delivery pipe can block the first communication channel, the second communication channel or the third communication channel; The guide head is installed at the front end of the cooling cylinder, the drain cylinder sleeve is installed at the rear end of the cooling cylinder, the drain cylinder sleeve is provided with a drain pipe, and the drain pipe communicates with the first drain channel, the second drain channel and the third drain channel respectively.

2. The structure of a high-pressure point cold die-casting mold according to claim 1, characterized in that: The sliding channel is located in the middle of the cooling cylinder, the first drain channel, the second drain channel and the third drain channel are respectively located on the outer periphery of the sliding channel, and the first drain channel, the second drain channel and the third drain channel are evenly spaced along the circumferential direction of the cooling cylinder.

3. The structure of a high-pressure point-cooled die-casting mold according to claim 2, characterized in that: The number of the first drain channels, the second drain channels and the third drain channels is two, and the two first drain channels are symmetrically arranged along the sliding channel, the two second drain channels are symmetrically arranged along the sliding channel, and the two third drain channels are symmetrically arranged along the sliding channel.

4. A high-pressure spot-cooling die-casting mold structure according to claim 1, characterized in that: The inner wall of the sliding channel is provided with a hierarchical adjustment groove, and the outer periphery of the delivery pipe is provided with a guide block, and the guide block can move along the length direction of the hierarchical adjustment groove.

5. The structure of a high-pressure point cold die-casting mold according to claim 4, characterized in that: The hierarchical adjustment groove includes a first sliding section, a second sliding section, a third sliding section, a first rotating section and a second rotating section; The first sliding section, the second sliding section and the third sliding section are arranged along the length direction of the cooling cylinder, and the first rotating section and the second rotating section are arranged along the circumferential direction of the cooling cylinder; One end of the first rotating section is connected to the rear end of the first sliding section, the other end of the first rotating section is connected to the front end of the second sliding section, one end of the second rotating section is connected to the rear end of the second sliding section, and the second rotating section is connected to the front end of the third sliding section.

6. The structure of a high-pressure point cold die-casting mold according to claim 1, wherein: The inner wall of the delivery pipe is provided with a plurality of guide convex strips, and the plurality of guide convex strips are evenly spaced along the length direction of the delivery pipe and are also evenly spaced along the circumferential direction of the delivery pipe.

7. The structure of a high-pressure point cold die-casting mold according to claim 1, characterized in that: The drain tube is sleeved with a first thread, and the outer periphery of the rear end of the cooling tube sleeve is provided with a second thread, and the second thread is adapted to the first thread.

8. A high-pressure point cold die-casting mold structure according to claim 7, characterized in that: The drain tube sleeve is provided with a first installation groove, the first installation groove is located at the rear side of the first thread, and the first installation groove is located on the outer periphery of the first drainage channel, the second drainage channel and the third drainage channel, and the first installation groove is used for placing a sealing ring.

9. A high-pressure point-cooled die-casting mold structure according to claim 1, characterized in that: The rear end of the drain tube sleeve is provided with a through hole, the rear end of the conveying pipe is installed in the through hole, and the inner wall of the through hole is provided with a second installation groove, and the second installation groove is used for placing a sealing ring.

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