Mold conforming cooling water path

Abstract

The application discloses a kind of mould conformal cooling waterway applied to mould water cooling related technical field, the scheme is by being provided with two cavities double-channel flexible pipe in water cooling channel, one hand, can assist cleaning scale, both can effectively overcome the problem that existing mould waterway scale removal is difficult, while double-channel flexible pipe can isolate scale, so that water cooling channel inner wall is not easy to scale directly, to effectively protect mould, not easy to affect service life due to scale, on the other hand, when the scale of the cavity used first is more, another cavity can be used to continue water cooling to ensure cooling efficiency;In addition, by the setting of linear monitoring strip, the scale formation of the scale formation area of the waterway corner can be effectively monitored, compared with regular cleaning scale, the timeliness of scale cleaning is effectively guaranteed, the local temperature difference of the mould caused by scale is effectively reduced, and the water cooling effect is effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of mold water cooling technology, and in particular to a mold conformal cooling water channel. Background Technology

[0002] Mold temperature control has a decisive impact on the molding quality and production efficiency of injection molded parts. The application of conformal cooling water channels can improve the traditional straight cooling channels into a three-dimensional conformal structure that closely follows the product contour, significantly improving cooling efficiency and uniformity. However, with long-term mold operation, scale deposits gradually form on the inner wall of the circulating cooling water channels, reducing the cross-section of the channels or even causing blockages. This leads to local temperature imbalances in the mold, resulting in defects such as shrinkage marks and warping in the products, severely impacting both production efficiency and yield.

[0003] In the existing technology, there are several solutions to the problem of scale buildup in the water channels of molds.

[0004] The first method is chemical cleaning. For example, Chinese patent application CN109605807A discloses a scale removal liquid inlet for mold cooling pipes, which uses a steel wire to quickly introduce the cleaning liquid into the pipes for reaction and cleaning. However, this type of chemical cleaning method is slow, takes a long time, and the weakly acidic cleaning liquid can easily corrode the mold substrate, causing irreversible damage. This is especially true for conformal cooling channels manufactured by additive manufacturing, where the inner wall surface is relatively rough, resulting in poor chemical cleaning effects and a higher risk of corrosion.

[0005] The second method is mechanical scraping. Chinese patent CN211389726U discloses a mold structure with conformal cooling water channels, which uses a flexible metal material to rotate and scrape within the water cavity to reduce scale buildup on the inner wall. While mechanical scraping can physically remove some scale, the scraping components struggle to achieve uniform and comprehensive contact within the complex, bend-shaped water channels, and frequent friction exacerbates wear on the inner walls of the channels, affecting the mold's service accuracy.

[0006] The third method is the structural disassembly method. Chinese patent CN210308612U discloses a detachable cooling channel device, which sets the cooling channel as a detachable connection between the inner and outer inserts, so that the first and second groove water channels can be cleaned after disassembly. However, this solution requires the addition of separate components to the mold structure, which not only increases the mold manufacturing cost and sealing difficulty, but is also not suitable for situations with dense water channels or compact structures, and the disassembly and assembly process still requires machine shutdown.

[0007] Therefore, in response to the above problems, there is an urgent need for a simple and reliable solution that can remove scale from the mold cooling water channel online in situ without damaging the inner wall of the water channel. Summary of the Invention

[0008] The core of this invention lies in solving the problem of difficult scale removal in the mold cooling water circuit, which easily affects the mold's lifespan, by setting a dual-channel flexible tube with a dual-cavity structure in the water cooling channel.

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A mold conformal cooling water channel includes water cooling channels disposed on the mold. The mold includes a movable mold shell and a fixed mold shell that cooperate with each other, as well as a movable mold core and a fixed mold core disposed in the movable mold shell and the fixed mold shell respectively. There are at least two sets of water cooling channels, one set corresponding to the movable mold core and the other set corresponding to the fixed mold core. The two sets of water cooling channels have the same composition. The water-cooling channels set on the moving mold shell and the moving mold core include two external joints fixedly connected to the outer end of the moving mold shell, a liquid inlet channel and a liquid outlet channel carved into the moving mold shell, and a heat exchange channel carved into the moving mold core. The inlet and outlet of the liquid inlet channel are respectively sealed and connected to the external joint and the heat exchange channel. The inlet and outlet of the liquid outlet channel are respectively sealed and connected to the other external joint and the other opening of the heat exchange channel. A double-channel flexible tube is also fitted into the inner wall of the water-cooling channel.

[0011] Furthermore, there is at least one moving mold core and one fixed mold core, and each moving mold core and each fixed mold core corresponds to a set of water cooling channels.

[0012] Furthermore, the dual-channel flexible tube includes an outer flexible tube body, two limiting edge rings respectively fixedly connected to the outer rings at both ends of the outer flexible tube body, and two moving inner tubes fixedly attached to the inner wall of the outer flexible tube body. A limiting groove is chiseled on the end face of the outer connector, the limiting edge rings and the limiting grooves are matched with each other, and the outer flexible tube body is completely attached to the inner wall of the liquid inlet channel, the heat exchange channel and the liquid outlet channel.

[0013] Furthermore, the middle parts of the two moving cavity inner tubes are attached to each other, and the two moving cavity inner tubes respectively form a right water passage cavity and a left water passage cavity. The ends of the two moving cavity inner tubes that are far apart from each other are fixedly attached to the inner walls corresponding to the outer flexible tube body.

[0014] Furthermore, two coaxially arranged electromagnetic rings are fixedly embedded inside the limiting edge ring, and the central angles corresponding to the two electromagnetic rings are both greater than 180°.

[0015] Furthermore, the moving cavity inner tube includes an inner flexible tube body that is fixedly attached to the inner wall of the outer flexible tube body, and two variable cavity strips that are fixedly connected to both ends of the inner flexible tube body. The two variable cavity strips are respectively arranged corresponding to two electromagnetic rings, and the two electromagnetic rings generate magnetic attraction force on the two variable cavity strips after being energized.

[0016] Furthermore, the outer flexible tube is made of thermally conductive silicone material, and multiple densely and evenly distributed magnetic sheets are fixedly embedded inside the variable cavity liner. The inner flexible tube is made of thermally conductive silicone with a metal mesh embedded inside.

[0017] Optionally, linear monitoring strips are provided on both the left and right outer walls of the outer flexible tube. The linear monitoring strips include air guide tubes fixedly attached to the outer wall of the outer flexible tube. Multiple hollow sensing plates are fixedly connected to the air guide tubes. The multiple hollow sensing plates correspond to multiple corners of the dual-channel flexible tube. A tension sensor is fixedly connected to the inner wall of the hollow sensing plate away from the outer flexible tube. The detection end of the tension sensor is fixedly connected to the middle of the inner wall on the other side of the hollow sensing plate.

[0018] Furthermore, the two linear monitoring strips correspond to the middle of the two moving chamber inner tubes respectively, one end of the air guide tube is sealed, and the other end of the air guide tube is fixed through the external connector and extends to the outside.

[0019] Compared with the prior art, the advantages of this invention are: (1) This solution uses a double-channel flexible tube with two cavities in the water cooling channel. On the one hand, both cavities can be used as cooling water channels. After a period of use, the unused cavity can assist the other cavity that has been used for a long time in descaling. This can effectively overcome the problem of difficult descaling of existing mold water channels. At the same time, the double-channel flexible tube can isolate scale, making it difficult for scale to form directly on the inner wall of the water cooling channel, thus effectively protecting the mold and preventing scale from affecting its service life. On the other hand, when there is a lot of scale in the cavity that is used first, the other cavity can be used to continue water cooling to ensure cooling efficiency.

[0020] (2) By setting the linear monitoring strip, the scaling situation in the water channel corner is effectively monitored. Compared with timed scaling removal, it effectively ensures the timeliness of scale removal, effectively reduces the local temperature difference of the mold caused by scale, and thus effectively ensures the water cooling effect. Attached Figure Description

[0021] Figure 1 This is an exploded view of the invention from a top angle; Figure 2 This is a perspective view of the mold of the present invention; Figure 3 This is an exploded view of the invention from a low angle; Figure 4 This is a half-sectional perspective view of the vertical plane of the present invention; Figure 5 This is a horizontal sectional view of the present invention; Figure 6 This is a perspective view of the dual-channel flexible tube of the present invention; Figure 7 This is a perspective view of the end portion of the dual-channel flexible tube of the present invention; Figure 8 This is a front view of the end of the dual-channel flexible tube of the present invention; Figure 9 This is a cross-sectional view of the limiting edge ring of the present invention; Figure 10 This is a schematic diagram of the cooling water entering the right water passage cavity of the present invention; Figure 11 This is a schematic diagram of the cooling water entering the left water passage chamber of the present invention; Figure 12 This is a schematic diagram of the dual-channel flexible tube after adding a linear monitoring strip according to the present invention; Figure 13 This is a schematic diagram of a partial cross-section of the linear monitoring strip of the present invention; Figure 14 This is a side view of the hollow sensing sheet of the linear monitoring strip of the present invention.

[0022] Explanation of the labels in the diagram: 11 Moving mold shell, 12 Fixed mold shell, 21 Moving mold core, 22 Fixed mold core, 3 Water cooling channel, 31 External connector, 32 Liquid inlet channel, 33 Heat exchange channel, 34 Liquid drain channel, 301 Limiting groove, 4 Dual-channel flexible tube, 41 External flexible tube body, 42 Limiting side ring, 43 Moving cavity inner tube, 431 Inner flexible tube body, 432 Variable cavity liner, 401 Right water passage cavity, 402 Left water passage cavity, 5 Electromagnetic ring, 61 Air guide tube, 62 Hollow sensing plate, 63 Tension sensor. Detailed Implementation

[0023] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0024] First implementation method: like Figures 1-3 A mold conformal cooling water channel includes water-cooling channels 3 disposed on the mold. The mold includes a movable mold shell 11 and a fixed mold shell 12 that cooperate with each other, and a movable mold core 21 and a fixed mold core 22 respectively disposed within the movable mold shell 11 and the fixed mold shell 12. There are at least two sets of water-cooling channels 3, one set corresponding to the movable mold core 21 and the other set corresponding to the fixed mold core 22, and the two sets of water-cooling channels 3 have the same composition. There is at least one movable mold core 21 and one fixed mold core 22, and each movable mold core 21 and each fixed mold core 22 corresponds to one set of water-cooling channels 3. Figure 1 and Figure 3 In this embodiment, four moving mold cores 21 and four fixed mold cores 22 are provided, so a total of eight water cooling channels 3 are provided. In actual implementation, the number of moving mold cores 21 and fixed mold cores 22 can be selected according to actual needs, and the number of water cooling channels 3 can be changed accordingly.

[0025] like Figures 3-5The water-cooling channel 3, which is set on the moving mold shell 11 and the moving mold core 21, includes two external connectors 31 fixedly connected to the outer end of the moving mold shell 11, an inlet channel 32 and a drain channel 34 carved into the moving mold shell 11, and a heat exchange channel 33 carved into the moving mold core 21. The inlet and outlet of the inlet channel 32 are sealed and connected to the external connector 31 and the heat exchange channel 33, respectively. The inlet and outlet of the drain channel 34 are sealed and connected to the other external connector 31 and the other opening of the heat exchange channel 33, respectively. A double-channel flexible tube 4 is also fitted into the inner wall of the water-cooling channel 3. Cooling water flows in the double-channel flexible tube 4 along the path of the external connector 31, the inlet channel 32, the heat exchange channel 33, the drain channel 34 and the other external connector 31. The double-channel flexible tube 4 can effectively isolate the water-cooling channel 3 and the cooling water, so that scale mainly deposits on the double-channel flexible tube 4 instead of on the inner wall of the water-cooling channel 3. Thus, without affecting the heat exchange, the impact of scale on the service life of the mold is reduced.

[0026] like Figure 6 The dual-channel flexible tube 4 includes an outer flexible tube body 41, two limiting side rings 42 respectively fixedly connected to the outer rings at both ends of the outer flexible tube body 41, and two moving inner tubes 43 fixedly attached to the inner wall of the outer flexible tube body 41. The outer connector 31 has a limiting groove 301 chiseled on the end face of the opening. The limiting side rings 42 and the limiting grooves 301 match each other. The outer flexible tube body 41 is completely attached to the inner wall of the liquid inlet channel 32, the heat exchange channel 33, and the liquid outlet channel 34.

[0027] like Figures 7-8 The two moving inner tubes 43 are attached to each other at their middle parts, and the two moving inner tubes 43 respectively form a right water passage cavity 401 and a left water passage cavity 402. The ends of the two moving inner tubes 43 that are far apart from each other are fixedly attached to the inner walls of the outer flexible tube body 41. The moving inner tube 43 includes an inner flexible tube body 431 fixedly attached to the inner wall of the outer flexible tube body 41 and two variable cavity liner strips 432 fixedly connected to both ends of the inner flexible tube body 431. Figure 9 The limiting edge ring 42 has two coaxially arranged electromagnetic rings 5 ​​fixedly embedded inside. The two variable cavity bushings 432 are respectively set with the two electromagnetic rings 5. Multiple dense and evenly distributed magnetic sheets are fixedly embedded inside the variable cavity bushings 432. After being energized, the two electromagnetic rings 5 ​​generate magnetic attraction force on the two variable cavity bushings 432 respectively. The central angles of the two electromagnetic rings 5 ​​are both greater than 180°, which effectively ensures that the electromagnetic rings 5 ​​can generate sufficient attraction force on the variable cavity bushings 432 after being energized. This effectively ensures that when the right water passage cavity 401 and the left water passage cavity 402 switch between each other, the unused cavity can be fully closed, and it is not easy for cooling water to simultaneously enter the right water passage cavity 401 and the left water passage cavity 402.

[0028] The outer flexible tube 41 is made of thermally conductive silicone material, and the inner flexible tube 431 is thermally conductive silicone with a metal mesh embedded inside. Through the setting of thermally conductive silicone and metal mesh, the dual-channel flexible tube 4 has excellent thermal conductivity, so that its setting does not easily affect the heat dissipation effect on the mold.

[0029] When using, such as Figures 10-11 First, the two electromagnetic rings 5 ​​on the same side at both ends of the dual-channel flexible tube 4 are energized, causing them to attract the corresponding variable cavity liner 432. This then opens either the right water passage cavity 401 or the left water passage cavity 402, allowing one of the cavities to perform the cooling function. For example, in the right water passage cavity 401, after a period of time, scale buildup occurs. When the mold is not in operation, the energized electromagnetic ring 5 can be de-energized. Losing its magnetic attraction, the left water passage cavity 402 is released from its closed state, and liquid is then filled into it. This causes the middle part of the moving cavity inner tube 43 to bulge towards the right water passage cavity 401. Liquid is then filled into the right water passage cavity 401 again, and this process is repeated alternately. During this process, the shape of the middle part of the moving cavity inner tube 43 changes significantly, causing the scale on its surface to crack or fall off and be discharged with the liquid, achieving a certain scale removal effect. Then, the right water passage cavity 401 can continue to perform the main cooling function. When there is a lot of scale that cannot be easily removed... The left water passage 402 can be controlled to undertake the main cooling function. When the left water passage 402 also has a lot of scale, the dual-channel flexible tube 4 can be directly removed and replaced with a new dual-channel flexible tube 4 to remove all the scale at once. Specifically, one end of the dual-channel flexible tube 4 can be removed from the limiting groove 301. Since the dual-channel flexible tube 4 has good overall elasticity and flexibility, the new dual-channel flexible tube 4 can be wrapped around the old dual-channel flexible tube 4 with plastic wrap or flexible tape, while binding the end of the dual-channel flexible tube 4 so that its size is smaller than the inner diameter of the water cooling channel 3. Then, pull the entire dual-channel flexible tube 4 outward from the other end of the dual-channel flexible tube 4. During this process, the new dual-channel flexible tube 4 is brought into the water cooling channel 3. Then, the shape of the dual-channel flexible tube 4 can be adjusted by air or liquid filling so that its outer wall fits the inner wall of the water cooling channel 3. Compared with the existing technology of directly using the water cooling channel 3 for cooling water transportation, the difficulty of cleaning scale is effectively reduced.

[0030] This solution involves installing a dual-channel flexible tube 4 with two cavities within the water-cooling channel 3. On one hand, both cavities can serve as cooling water paths, and after a period of use, the unused cavity can assist in descaling the other cavity that has been used for an extended period. This effectively overcomes the problem of difficult descaling in existing mold water paths. At the same time, the dual-channel flexible tube 4 can isolate scale, preventing direct scaling on the inner wall of the water-cooling channel 3, thus effectively protecting the mold and preventing its service life from being affected by scaling. On the other hand, when the cavity used first has a large amount of scale, the other cavity can be switched to continue water cooling to ensure cooling efficiency.

[0031] Second implementation method: This embodiment adds a linear monitoring bar to the first embodiment, while the rest remains the same as the first embodiment.

[0032] like Figures 12-14 As shown, linear monitoring strips are provided on both the left and right outer walls of the outer flexible tube 41. Each linear monitoring strip includes an air guide tube 61 fixedly attached to the outer wall of the outer flexible tube 41. Multiple hollow sensing elements 62 are fixedly connected to the air guide tube 61, each corresponding to a corner of the dual-channel flexible tube 4. A tension sensor 63 is fixedly connected to the inner wall of the hollow sensing element 62 away from the outer flexible tube 41. The detection end of the tension sensor 63 is fixedly connected to the middle of the inner wall of the other side of the hollow sensing element 62. Two linear monitoring strips correspond to the middle of the inner tubes 43 of the two moving cavities, respectively, so that the two linear monitoring strips can correspond to the right water passage cavity 401 and the left water passage cavity 402, respectively. This ensures that regardless of which cavity is put into water cooling operation, a corresponding linear monitoring strip can detect scaling. One end of the air guide tube 61 is sealed. The air guide tube 61 is fixedly inserted through the external connector 31 and extends to the outside. After a certain cavity has been in use for a period of time, air can be injected into the corresponding linear monitoring strip every once in a while when the mold is not working. The air enters the linear monitoring strip along the end of the air guide tube 61 that extends to the outside, and fills the air guide tube 61 and the hollow sensing plate 62 in sequence. At this time, the hollow sensing plate 62 expands and deforms towards the side of the dual-channel flexible tube 4, thereby pulling the detection end of the tension sensor 63 and generating tension data. If the scale layer is thicker, the resistance generated by the deformation of the hollow sensing plate 62 is greater, and the tension data generated by the corresponding tension sensor 63 is smaller under the same air pressure. The data of multiple tension sensors 63 can be compared to determine the scale condition at each corner in the water cooling channel 3.

[0033] In addition, in the prior art, temperature sensors are installed at each corner of the water cooling channel 3 corresponding to the mold. The thermal conductivity is used to determine the scaling situation at the corner. The lower the temperature of the temperature sensor, the more scaling there is (the scale layer affects the thermal conductivity). In this embodiment, the data of the above-mentioned tension sensor 63 can be mutually verified with the temperature sensor data of the existing design to ensure the accuracy of the scaling monitoring results.

[0034] By setting linear monitoring bars, the scaling situation in areas prone to scaling at water channel corners can be effectively monitored. Compared with timed scaling removal, this effectively ensures the timeliness of scale removal, effectively reduces the local temperature difference in the mold caused by scale, and thus effectively ensures the water cooling effect.

[0035] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A mold conformal cooling water channel, comprising a water cooling channel (3) disposed on the mold, the mold comprising a movable mold shell (11) and a fixed mold shell (12) that cooperate with each other, and a movable mold core (21) and a fixed mold core (22) respectively disposed in the movable mold shell (11) and the fixed mold shell (12), characterized in that: The water cooling channel (3) is at least two sets, one set corresponding to the moving mold core (21) and the other set corresponding to the fixed mold core (22), and the two sets of water cooling channels (3) have the same composition; The water cooling channel (3) provided on the moving mold shell (11) and the moving mold core (21) includes two external connectors (31) fixedly connected to the outer end of the moving mold shell (11), a liquid inlet channel (32) and a liquid outlet channel (34) carved in the moving mold shell (11), and a heat exchange channel (33) carved in the moving mold core (21). The inlet and outlet of the liquid inlet channel (32) are respectively sealed and connected to the external connector (31) and the heat exchange channel (33). The inlet and outlet of the liquid outlet channel (34) are respectively sealed and connected to the other external connector (31) and the other opening of the heat exchange channel (33). The inner wall of the water cooling channel (3) is also fitted with a double-channel flexible tube (4). The dual-channel flexible tube (4) includes an outer flexible tube body (41), two limiting side rings (42) respectively fixedly connected to the outer rings at both ends of the outer flexible tube body (41), and two moving cavity inner tubes (43) fixedly attached to the inner wall of the outer flexible tube body (41). The outer connector (31) has a limiting groove (301) chiseled on its end face. The limiting side ring (42) matches the limiting groove (301). The outer flexible tube body (41) is completely attached to the inner wall of the liquid inlet channel (32), the heat exchange channel (33), and the liquid outlet channel (34).

2. The mold conformal cooling water channel according to claim 1, characterized in that: The number of each of the moving mold core (21) and the fixed mold core (22) is at least one, and each of the moving mold core (21) and each of the fixed mold cores (22) corresponds to a set of water cooling channels (3).

3. The mold conformal cooling water channel according to claim 1, characterized in that: The middle parts of the two moving cavity inner tubes (43) are attached to each other, and the two moving cavity inner tubes (43) respectively form a right water passage cavity (401) and a left water passage cavity (402). The ends of the two moving cavity inner tubes (43) that are far apart from each other are fixedly attached to the inner wall of the outer flexible tube body (41).

4. The mold conformal cooling water channel according to claim 3, characterized in that: The limiting edge ring (42) has two coaxially arranged electromagnetic rings (5) fixedly embedded inside, and the central angles of the two electromagnetic rings (5) are both greater than 180°.

5. A mold conformal cooling water channel according to claim 4, characterized in that: The moving cavity inner tube (43) includes an inner flexible tube (431) fixedly attached to the inner wall of the outer flexible tube (41) and two variable cavity strips (432) fixedly connected to both ends of the inner flexible tube (431). The two variable cavity strips (432) are respectively arranged corresponding to two electromagnetic rings (5), and the two electromagnetic rings (5) generate magnetic attraction force on the two variable cavity strips (432) after being energized.

6. A mold conformal cooling water channel according to claim 5, characterized in that: The outer flexible tube (41) is made of thermally conductive silicone material, and the variable cavity liner (432) is fixedly embedded with multiple densely and evenly distributed magnetic sheets. The inner flexible tube (431) is made of thermally conductive silicone with a metal mesh embedded inside.

7. A mold conformal cooling water channel according to claim 1, characterized in that: Linear monitoring strips are provided on both the left and right outer walls of the outer flexible tube (41). The linear monitoring strips include air guide tubes (61) that are fixedly attached to the outer wall of the outer flexible tube (41). Multiple hollow sensing plates (62) are fixedly connected to the air guide tubes (61). The multiple hollow sensing plates (62) correspond to multiple corners of the dual-channel flexible tube (4). A tension sensor (63) is fixedly connected to the inner wall of the hollow sensing plate (62) away from the outer flexible tube (41). The detection end of the tension sensor (63) is fixedly connected to the middle of the inner wall on the other side of the hollow sensing plate (62).

8. A mold conformal cooling water channel according to claim 7, characterized in that: The two linear monitoring bars correspond to the middle of the two moving cavity inner tubes (43) respectively. One end of the air guide tube (61) is sealed, and the other end of the air guide tube (61) is fixedly inserted through the outer connector (31) and extends to the outside.

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