Novel cooling structure of low-voltage circuit breaker

Abstract

The utility model discloses a novel cooling structure of a low-voltage circuit breaker, which is characterized in that a movable mold assembly is provided with a first cooling water channel, the movable mold assembly comprises a movable mold main core and a plurality of inserts, the movable mold main core is provided with a first well hole communicated with the first cooling water channel, and the inserts are distributed around the movable mold main core; the insert is provided with a second well hole which is communicated with the first cooling water path to drive; the fixed mold assembly is provided with a second cooling water channel and comprises a fixed mold main core, the fixed mold main core is matched with the movable mold main core, and the fixed mold main core is provided with a third well hole communicated with the second cooling water channel. According to the water well structure, temperature consistency of all parts during cooling in the product forming process is effectively guaranteed, product cooling is uniform, meanwhile, production is stable, product cooling time is greatly shortened, therefore, the product forming period is effectively shortened, production efficiency is improved, and the service life of a mold is guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to a novel cooling structure of a low-voltage circuit breaker. Background Art

[0002] Molds are used in industrial production to obtain the desired products by methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, and stamping. In a series of production processes such as blow molding and extrusion, the mold will generate high temperatures, and it is necessary to transfer the heat to the outside in time to prevent the high temperature from causing harm to the mold and the product. In order to control the temperature of the injection mold, a cooling water system is provided on the mold for cooling water to pass through. The cooling water system can accelerate the cooling of the product by controlling the temperature of the injection mold, so that the plastic can be injection molded.

[0003] The cooling water channel in the injection mold in the prior art is generally arranged horizontally or vertically in the injection mold. For a cavity with a complex shape, the direction of the cooling water channel does not match the structural distribution of the cavity, resulting in inconsistent temperatures in different parts of the cavity, making the cooling of the workpiece uneven, affecting the quality of the workpiece. For some molds with more disassembled parts, such as the housing of a low-voltage circuit breaker, as shown in the attached figure, Figure 1-2 As shown, the main core cannot use too many water channels and can only be designed according to the traditional cooling water channel. However, this design has too few cooling water channels and unbalanced cooling, resulting in uneven product shrinkage, too long cooling time, long injection cycle, and reduced production efficiency.

[0004] Therefore, in view of the above problems, the present invention proposes a new technical solution. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a new cooling structure for a low-voltage circuit breaker.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a new cooling structure of a low-voltage circuit breaker, which includes:

[0007] The movable mold assembly is provided with a first cooling water channel. The movable mold assembly includes a movable mold main core and a plurality of inserts. The movable mold main core is provided with a first water well hole connected to the first cooling water channel. The inserts are distributed around the movable mold main core. The inserts are provided with a second water well hole connected to the first cooling water channel.

[0008] The fixed mold assembly is provided with a second cooling water channel. The fixed mold assembly comprises a fixed mold main core, the fixed mold main core cooperates with the movable mold main core, and the fixed mold main core is provided with a third water well hole connected with the second cooling water channel.

[0009] With this structural setting, the first water well hole of the movable mold main core, the second water well hole of the insert, and the third water well hole of the fixed mold main core cooperate with each other to form a cooling effect. Compared with the cooling method in the prior art, this water well structure effectively ensures the temperature consistency of various parts during cooling during the product molding process, and the product is cooled evenly. At the same time, the production is stable, which greatly reduces the cooling time of the product, thereby effectively reducing the product molding cycle, improving production efficiency, and ensuring the service life of the mold.

[0010] The first water well hole includes a first groove and a second groove, and the first groove is connected with the second groove to form a convex structure.

[0011] The first water well hole adopts this structural setting, which increases the contact area of ​​the water well hole and better achieves the cooling effect.

[0012] The first water well hole accommodates a first waterproof sheet, and the first waterproof sheet extends horizontally from the first groove to the second groove.

[0013] The water-blocking plate makes the cooling water circuit form a loop effect. The first water-blocking plate does not isolate the entire first water well hole, but forms an isolation effect on the top of the first water well hole. The bottom of the first water well hole is still interconnected to form the effect of water inlet and outlet, which is equivalent to connecting the first water well hole in series in the entire cooling water circuit.

[0014] Wherein, the first water well hole is provided with a first slot matched with the first water-isolating sheet.

[0015] The provision of the first slot enables the first waterproof sheet to better play a positioning and fixing effect.

[0016] The first water well hole also accommodates a second water blocking sheet, the second water blocking sheet is located below the first water blocking sheet, and the first water blocking sheet cooperates with the second water blocking sheet.

[0017] The second waterproof sheet is provided to prevent the area of ​​the first water well hole from being too large. During use, the strength of the first waterproof sheet is too low to affect the cooling effect, so the strength is increased by the second waterproof sheet.

[0018] The second waterproof sheet is provided with a second slot, and the first waterproof sheet partially extends to the second slot.

[0019] The provision of the second slot achieves a better fixing effect of the first waterproof sheet.

[0020] Among them, the number of the third water well holes is at least two.

[0021] The number of the third water well holes is limited to achieve a better cooling effect. Here, the number of the third water well holes is taken as three for example. The three third water well holes form a triangular distribution, which can be specifically an isosceles triangle.

[0022] Wherein, the second water well hole and the third water well hole both contain a third water blocking sheet.

[0023] The third water-isolating plate also serves to connect the cooling water path.

[0024] Among them, the movable mold assembly includes a movable mold pad, the movable mold pad is provided with a third cooling water channel, and the third cooling water channel surrounds the movable mold pad; the fixed mold assembly includes a fixed mold pad, the fixed mold pad is provided with a fourth cooling water channel, and the fourth cooling water channel surrounds the fixed mold pad.

[0025] The third cooling water channel and the fourth cooling water channel are both used for cooling the pad itself to prevent the local temperature from being too high and affecting the consistency of the product.

[0026] Among them, the fixed mold pad is provided with a fifth cooling water channel cooperating with the hot runner.

[0027] The fifth cooling water channel is designed for a mold structure with a hot runner to disperse the heat concentrated around the hot nozzle (main runner). BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a rear view of a circuit breaker housing in the prior art;

[0029] Figure 2 It is a front view of the circuit breaker housing in the prior art;

[0030] Figure 3 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0031] Figure 4 It is a perspective view of the movable mold backing plate in Example 1 of the utility model;

[0032] Figure 5 It is a perspective view of the fixed die pad in Example 1 of the utility model;

[0033] Figure 6 It is a schematic diagram of the local structure in Example 1 of the utility model;

[0034] Figure 7 yes Figure 6 A partial enlarged view of the middle A part;

[0035] Figure 8 yes Figure 6 The main view;

[0036] Fig. 9 yes Figure 6 Rear view of. DETAILED DESCRIPTION

[0037] Embodiment 1:

[0038] A new cooling structure for low voltage circuit breaker, as shown in the attached Figure 3-9 As shown, including:

[0039] The movable mold assembly 11 is provided with a first cooling water channel 12. The first cooling water channel 12 is connected to the outside, which may be water, oil or coolant. A circulating cooling effect is achieved through the first cooling water channel 12. Here, the first cooling water channel 12 has an inlet and an outlet. The movable mold assembly 11 includes a movable mold main core 13 and a plurality of inserts 14. The movable mold main core 13, the inserts 14 and the fixed mold main core 15 cooperate to form a cavity effect. The colloid is injected into the cavity to achieve an injection molding effect. The number of inserts 14 can be adjusted according to actual needs. The inserts 14 surround the movable mold main core 13 to form a matching effect. In this embodiment, the movable mold main core 13 is used for molding the inside of the circuit breaker housing, and the fixed mold main core 15 is used for molding the outside of the circuit breaker housing. The movable mold main core 13 is provided with a first water well hole 16 connected to the first cooling water circuit 12. Here, the first water well hole 16 can be located in the central area of ​​the movable mold main core 13, or in an area close to the center, so that the temperature at each position is close to the same. The insert 14 is distributed around the movable mold main core 13. The insert 14 is provided with a second water well hole 17 connected to the first cooling water circuit 12. The number of the second water well holes 17 can be adjusted according to actual needs. In this embodiment, the number of the second water well holes 17 is four, two by two, and they are arranged on both sides of the first water well hole 16, forming a surrounding cooling effect. The second water well hole 17 is used to cool the side wall of the cavity. It should also be noted that the first water well hole 16 and the second water well hole 17 are both connected in series in the first cooling water circuit 12, playing a connecting effect. Take the first water well hole 16 as an example, that is, after water enters the first water well hole 16, it flows out from the first water well hole 16, taking away the heat around the first water well hole 16. In addition, the depths of the first water well hole 16 and the second water well hole 17 can be adjusted according to actual needs.

[0040] The fixed mold assembly 18 is provided with a second cooling water channel 19. The second cooling water channel 19 is consistent with the first cooling water channel 12 and is connected to the outside. External water, oil or coolant enters the second cold zone water channel to form a circulating cooling effect. The second cooling water channel 19 also has an inlet and an outlet. The fixed mold assembly 18 includes a fixed mold main core 15. The size of the fixed mold main core 15 is larger than the movable mold main core 13. The movable mold main core 13, the insert 14 and the fixed mold main core 15 cooperate to form a cavity effect. The fixed mold main core 15 is provided with a third water well hole 20 connected to the second cooling water channel 19. The third water well hole 20 is used to cool the fixed mold main core 15.

[0041] With this structural setting, the first water well hole 16 of the movable mold main core 13, the second water well hole 17 of the insert 14, and the third water well hole 20 of the fixed mold main core 15 cooperate with each other to form a cooling effect. Compared with the cooling method in the prior art, this water well structure effectively ensures the temperature consistency of various parts during cooling during the product molding process, the product is cooled evenly, and the production is stable, which greatly reduces the cooling time of the product, thereby effectively reducing the product molding cycle, improving production efficiency, and ensuring the service life of the mold.

[0042] Specifically, as attached Figure 6-9 As shown, the first water well hole 16 includes a first groove 161 and a second groove 162, and the first groove 161 is connected to the second groove 162 to form a convex structure. The depth of the first groove 161 and the second groove 162 is the same. In this embodiment, the first groove 161 is arranged horizontally, and the second groove 162 is arranged longitudinally. The first groove 161 is connected to the first cooling water channel 12 to form the effect of water inlet and outlet, while the second groove 162 is the water entering the second groove 162, which increases the contact area and has a cooling effect. The first water well hole 16 adopts this structural setting, which increases the contact area of ​​the water well hole and better achieves the cooling effect. In addition, the first water well hole 16 can also be other shapes, the purpose of which is to increase the contact area.

[0043] Specifically, as attached Figure 6-9 As shown, the first water well hole 16 accommodates the first water baffle 21, and the first water baffle 21 extends horizontally from the first groove 161 to the second groove 162. The first water baffle 21 makes the cooling water circuit form a loop effect. The first water baffle 21 does not isolate the entire first water well hole 16, but forms an isolation effect on the top of the first water well hole 16. The bottom of the first water well hole 16 is still interconnected to form the effect of water inlet and water outlet, which is equivalent to the first water well hole 16 in series in the entire cooling water circuit. For example, the left side is water inlet and the right side is water outlet. The water flow first enters the left end of the first groove 161, and the water flow flows into the second groove 162. Then the water at the left end of the first groove 161 and the second groove 162 flows toward the right side through the bottom of the first water well hole 16, and finally connects with the first cooling water circuit 12 from the right end of the first groove 161, thereby achieving a circulation effect and taking away the heat of the movable mold main core 13. In addition, the water flow can also flow through the top of the first water well hole 16.

[0044] Specifically, as attached Figure 6-9As shown, the first water well hole 16 is provided with a first slot 163 that cooperates with the first water barrier 21. The provision of the first slot 163 enables the first water barrier 21 to better play a positioning and fixing effect. Here, the two ends of the first water barrier 21 can be respectively inserted into the first slot 163, or the two ends of the first water barrier 21 can be provided with a structure that cooperates with the first slot 163, so as to achieve a fixing effect.

[0045] Specifically, as attached Figure 6-9 As shown, the first water well hole 16 also accommodates a second water-blocking sheet 22, and the second water-blocking sheet 22 is located below the first water-blocking sheet 21, and the first water-blocking sheet 21 cooperates with the second water-blocking sheet 22. The second water-blocking sheet 22 is provided to prevent the area of ​​the first water well hole 16 from being too large. During use, the strength of the first water-blocking sheet 21 is too low to affect the cooling effect, so the strength is increased by the second water-blocking sheet 22. The first water-blocking sheet 21 and the second water-blocking sheet 22 form a cross connection. The second water-blocking sheet 22 is located at the connection between the first groove 161 and the second groove 162, forming a middle partition effect. However, it should be noted that there is still a certain gap between the bottom of the second water-blocking sheet 22 and the bottom surface of the first water well hole 16, and water can still flow. In the present embodiment, the first water-blocking plate 21 can also be against the bottom surface of the first water well hole 16. The first water-blocking plate 21 is set high and low, that is, the part of the first water-blocking plate 21 located in the first groove 161 is higher than the part located in the second groove 162. A separation effect is formed by the second water-blocking plate 22. Therefore, the water flow first passes through the left end of the first groove 161 and the left end of the second groove 162, flows into the right end of the second groove 162 through the upper end of the first water-blocking plate 21, and then flows from the right end of the second groove 162 to the left end of the first groove 161, and finally flows out to the first cooling water channel 12, thereby achieving a cooling effect.

[0046] Specifically, as attached Figure 6-9 As shown, the second waterproof sheet 22 is provided with a second slot 221, and a portion of the first waterproof sheet 21 extends to the second slot 221. The provision of the second slot 221 achieves a better fixing effect of the first waterproof sheet 21.

[0047] Specifically, as attached Figure 6-9 As shown, the number of the third water well holes 20 is at least two. The number of the third water well holes 20 is limited to achieve a better cooling effect. Here, the number of the third water well holes 20 is three as an example. The three third water well holes 20 form a triangular distribution, which can be an isosceles triangle. The temperature of the third water well hole 20 can be adjusted according to actual needs.

[0048] Specifically, as attached Figure 6-9As shown, the second water well hole 17 and the third water well hole 20 are both provided with a third water blocking sheet 23. The third water blocking sheet 23 also serves to connect the cooling water path. The third water blocking sheet 23 is used to isolate the upper end of the water well hole, and the lower end of the water well hole is connected.

[0049] Specifically, as attached Figure 3-5 As shown, the movable mold assembly 11 includes a movable mold pad 24, and the movable mold pad 24 is provided with a third cooling water channel 26. The third cooling water channel 26 surrounds the movable mold pad 24. Here, the third cooling water channel 26 is a frame-shaped and cross-shaped structure, and a 45° chamfer connection is formed around it, which solves the problem of insufficient space. The fixed mold assembly 18 includes a fixed mold pad 25, and the fixed mold pad 25 is provided with a fourth cooling water channel 27. The fourth cooling water channel 27 surrounds the fixed mold pad 25. The fourth cooling water channel 27 has a similar structure to the third cooling water channel 26, and is also a frame-shaped and cross-shaped structure, and is also connected with a 45° chamfer around it. The third cooling water channel 26 and the fourth cooling water channel 27 are both used for self-cooling of the pad to prevent the local temperature from being too high and affecting the consistency of the product. The third cooling water channel 26 and the fourth cooling water channel 27 are both connected to the outside, and are provided with corresponding inlets and outlets. The first cooling water channel 12 is located in the movable mold pad 24, and the second cooling water channel 19 is located in the fixed mold pad 25.

[0050] Specifically, as attached Figure 3-5 As shown, the fixed mold pad 25 is provided with a fifth cooling water channel 28 that cooperates with the hot runner. The fifth cooling water channel 28 is designed for a mold structure with a hot runner to disperse the heat concentrated around the hot nozzle (main runner).

[0051] Specifically, the mold can be a mold with four cavities, a mold with two cavities, or a mold with eight cavities. Those skilled in the art can choose according to actual needs.

Claims

1. A novel cooling structure for a low voltage circuit breaker, characterized in that: include: The movable mold assembly is provided with a first cooling water channel. The movable mold assembly includes a movable mold main core and a plurality of inserts. The movable mold main core is provided with a first water well hole connected to the first cooling water channel. The inserts are distributed around the movable mold main core. The inserts are provided with a second water well hole connected to the first cooling water channel. The fixed mold assembly is provided with a second cooling water channel. The fixed mold assembly comprises a fixed mold main core, the fixed mold main core cooperates with the movable mold main core, and the fixed mold main core is provided with a third water well hole connected with the second cooling water channel.

2. A novel cooling structure for a low voltage circuit breaker according to claim 1, characterized in that: The first water well hole comprises a first groove and a second groove, and the first groove is connected with the second groove to form a convex structure.

3. A novel cooling structure for a low voltage circuit breaker according to claim 2, characterized in that: The first water well hole accommodates a first waterproof sheet, and the first waterproof sheet horizontally extends from the first groove to the second groove.

4. A novel cooling structure for a low voltage circuit breaker according to claim 3, characterized in that: The first water well hole is provided with a first slot matched with the first water blocking sheet.

5. A novel cooling structure for a low voltage circuit breaker according to claim 3 or 4, characterized in that: The first water well hole also accommodates a second water blocking sheet, the second water blocking sheet is located below the first water blocking sheet, and the first water blocking sheet cooperates with the second water blocking sheet.

6. A novel cooling structure for a low voltage circuit breaker according to claim 5, characterized in that: The second waterproof sheet is provided with a second slot, and the first waterproof sheet partially extends to the second slot.

7. A novel cooling structure for a low voltage circuit breaker according to claim 1, characterized in that: The number of the third water well holes is at least two.

8. A novel cooling structure for a low voltage circuit breaker according to claim 1, characterized in that: The second water well hole and the third water well hole both contain a third water blocking sheet.

9. A novel cooling structure for a low voltage circuit breaker according to claim 1, characterized in that: The movable mold assembly includes a movable mold pad, which is provided with a third cooling water channel surrounding the movable mold pad; the fixed mold assembly includes a fixed mold pad, which is provided with a fourth cooling water channel surrounding the fixed mold pad.

10. A novel cooling structure for a low voltage circuit breaker according to claim 9, characterized in that: The fixed mold pad is provided with a fifth cooling water channel cooperating with the hot runner.

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