Cooling device for injection molding of electrical switch panel

Abstract

The invention discloses an electrical switch panel injection molding cooling device, and relates to the technical field of injection molding cooling, the electrical switch panel injection molding cooling device comprises a movable mold and a fixed mold, the fixed mold is provided with a mold cavity, the mold cavity is provided with a shaping bulge, the shaping bulge comprises a corner part and a shaping part, and the shaping part is internally provided with a flow guide cavity for accommodating the corner part; and when the corner part and the shaping part form a completely closed outer contour of the shaping bulge, the flow guide cavity is closed. Through cooperation of the corner part and the shaping part, in the injection molding stage, the corner part extends out to form a complete shaping protrusion outer contour with the shaping part, and the appearance precision of an injection molding part is ensured; in the cooling stage, the corner part is contained in the flow guide cavity, a heat dissipation cavity communicating with the flow guide cavity is formed, a heat dissipation medium can flow through the heat dissipation cavity through the flow guide cavity, accurate and efficient heat dissipation of the corner part of the injection molding part is achieved, and the problem that heat dissipation is insufficient due to the fact that a traditional fixed flow channel is difficult to cover the corner part is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection cooling, in particular to an injection molding cooling device for electrical switch panel. BACKGROUND

[0002] Conventional plastics are one of the main materials for waste recycling, which has high recycling rate and recycling value. One way of using is to melt the plastic waste as raw material to make electrical switch panel. After injection molding, the injection molded part in the mold needs to be cooled and shaped. The cooling efficiency and cooling uniformity directly affect the molding quality, production cycle and product qualification rate of the switch panel.

[0003] In the prior art, the cooling device for the injection mold of the electrical switch panel usually adopts a whole cooling channel structure, that is, a fixed cooling flow channel is preset in the mold, and cooling water or other heat dissipation medium is introduced into the flow channel to achieve cooling. However, the electrical switch panel usually has complex structures such as multiple corners and protrusions, and the corresponding mold cavity also has special-shaped and shaped protrusions. When using the traditional fixed cooling flow channel design, the following defects exist: on the one hand, the fixed flow channel of the shaped protrusion is difficult to fully cover, which leads to insufficient heat dissipation at this part, and the injection molded part is prone to shrinkage deformation, internal stress concentration and other problems; on the other hand, the position of the fixed flow channel cannot be adjusted, and the distance between the flow channel and the mold cavity is fixed during the injection molding stage, which may affect the heat preservation effect of the mold cavity, thereby affecting the filling quality of the injection molded part, and during the cooling stage, the heat dissipation range and heat dissipation intensity cannot be adjusted according to the heat dissipation demand of the injection molded part, which leads to low cooling efficiency and prolongs the production cycle. SUMMARY

[0004] The purpose of the present application is to solve the problems of insufficient heat dissipation at the corner part, low cooling efficiency, poor molding quality and other problems of the electrical switch panel injection mold cooling device in the prior art, and to provide an injection molding cooling device for electrical switch panel.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: An injection molding cooling device for electrical switch panel, comprising a movable mold and a fixed mold, the fixed mold is provided with a mold cavity, the mold cavity is provided with a shaped protrusion, the shaped protrusion comprises a corner part and a shaping part, the shaping part is provided with a flow guide cavity for accommodating the corner part; When the corner part and the shaping part form a complete closed shaped protrusion outer contour, the flow guide cavity is closed; When the corner part is accommodated in the flow guide cavity, the flow guide cavity is opened, a heat dissipation cavity is formed at the original position of the corner part, and the heat dissipation cavity and the flow guide cavity are communicated; The flow guide cavity is provided with an inflow port and a flow guide port, the inflow port supplements the heat dissipation medium into the flow guide cavity, and the flow guide port guides the heat dissipation medium out.

[0006] Further, the corner portion is inclined to slide in the shaping portion, and the sliding surface of the corner portion is inclined to the horizontal surface of the shaping portion. Through the inclined sliding design, the movement trajectory of the corner portion during the storage and extension process is more stable, and at the same time, it is ensured that the heat dissipation cavity formed after storage can smoothly communicate with the flow guide cavity, avoiding the occurrence of heat dissipation medium flow dead angle.

[0007] Further, the outer end of the corner portion is provided with a flow stopping flange, the cross section of the flow stopping flange is L-shaped, and the outer end of the flow stopping flange is perpendicular to the inner wall of the flow guide cavity. The L-shaped flow stopping flange can tightly fit the inner wall of the flow guide cavity when the corner portion is extended and closed with the shaping portion, realizing reliable sealing of the flow guide cavity, preventing the molten material in the mold cavity during the injection molding stage from entering the flow guide cavity, and avoiding leakage of the heat dissipation medium during the cooling stage.

[0008] Further, a stop groove is arranged on the inner wall of the flow guide cavity, and the outer end side surface of the flow stopping flange is fitted on one end side wall of the stop groove. The stop groove can limit the extension stroke of the corner portion, ensure the precise butt joint of the corner portion and the shaping portion, form a complete shaped convex outer contour, and ensure the shape accuracy of the injection molded part.

[0009] Further, a positioning portion is horizontally slidably arranged in the stop groove, and the outer end of the flow stopping flange is positioned between the one end side wall of the stop groove and the positioning portion. The positioning portion can clamp and fix the flow stopping flange after the corner portion is extended in place, further improve the stability of the cooperation between the corner portion and the shaping portion, and avoid displacement of the corner portion due to mold vibration during injection molding, affecting the molding quality.

[0010] Further, a driving member for driving the corner portion to slide is arranged in the flow guide cavity. The driving member provides power for the sliding of the corner portion, realizes automatic switching between the molding and cooling stages, and does not need manual operation, improving the production efficiency.

[0011] Further, the driving member is an electric linear driving member or a rotating shaft brake portion. The rotating shaft brake portion comprises: a rotating shaft rotating on the inner wall of the flow guide cavity; an actuating rod fixed on the outer side wall of the rotating shaft and rotating with the rotating shaft; a U-shaped resisting rod, both ends of which are fixed on the side wall of the corner portion; When the rotation shaft rotates, the corner portion moves out of the flow guide cavity when the actuating rod contacts the corner portion side wall, and the corner portion moves into the flow guide cavity when the actuating rod contacts the outer wall of the U-shaped resisting rod. When the rotation shaft brake portion is used as a driving part, the sliding of the corner portion is realized by mechanical transmission, the structure is compact, the transmission is stable, and the movement stroke of the corner portion can be accurately controlled. When an electric linear driving part is selected, the transmission structure can be simplified, and accurate automatic control can be realized.

[0012] Further, the rotation shaft and the positioning portion are connected by a connecting piece, and the connecting piece is a connecting rod that actuates the positioning portion to slide horizontally in the stop groove when the rotation shaft rotates. The connecting rod links the rotation shaft and the positioning portion to realize the synchronous action of the sliding of the corner portion and the clamping / release of the positioning portion, simplifies the control logic, and reduces the control complexity and manufacturing cost of the equipment.

[0013] Further, the flow guide cavities are multiple, and the rotation shafts in the multiple flow guide cavities are connected by a bevel gear set. The multiple flow guide cavities can be adapted to an electrical switch panel mold with multiple special-shaped corners, the synchronous rotation of the multiple rotation shafts is realized by the bevel gear set, the multiple corner portions are driven to move synchronously, the uniformity of the cooling process is ensured, and the adaptability and universality of the equipment are improved.

[0014] Further, the corner portion and the shaping portion are respectively provided with cooling cavity one and cooling cavity two, and heat dissipation liquid flows in the cooling cavity one and the cooling cavity two. The flow guide cavity is provided with a liquid supplementing pipe and a liquid guiding pipe, and the liquid supplementing pipe and the liquid guiding pipe are both telescopic sleeve pipe structures for restricting the sliding of the corner portion. The liquid supplementing pipe supplements heat dissipation liquid into the cooling cavity one, and the liquid guiding pipe guides the heat dissipation liquid in the cooling cavity one out. The cooling cavity one and the cooling cavity two can cool the corner portion and the shaping portion, so that the temperature of the mold part does not affect the cooling and shaping of the injection molded part. The telescopic sleeve pipe structures of the liquid supplementing pipe and the liquid guiding pipe can realize stable delivery of the heat dissipation liquid and guide the sliding of the corner portion, so that the movement of the corner portion is stable and accurate.

[0015] The beneficial effects of the present application are as follows: 1. Realize adaptive switching between the forming and cooling stages: the corner portion and the shaping portion are matched in the present application, in the injection molding stage, the corner portion extends out to form a complete shaping protrusion outer contour with the shaping portion, so as to ensure the shape accuracy of the injection molded part; in the cooling stage, the corner portion is received into the flow guide cavity to form a heat dissipation cavity in communication with the flow guide cavity, and the heat dissipation medium can flow through the heat dissipation cavity through the flow guide cavity, so as to realize accurate and efficient heat dissipation of the corner portion of the injection molded part, and solve the problem of insufficient heat dissipation caused by the difficulty of the traditional fixed flow channel to cover the corner portion.

[0016] 2. Good cooling uniformity and high efficiency: The interconnected design of the heat dissipation cavity and the flow guiding cavity allows the heat dissipation medium to flow fully through the key heat dissipation parts of the injection molded part. At the same time, the cooling cavities in the corner and shaping parts further enhance the cooling effect, effectively shorten the cooling time, and improve production efficiency. The synchronous control design of multiple flow guiding cavities can be adapted to complex switch panels to ensure cooling uniformity.

[0017] 3. Stable structure and reliable sealing: The L-shaped flow-stopping flange and the stop groove work together to achieve a reliable seal of the flow-guiding cavity, preventing molten material from entering during the injection molding stage and leakage of heat dissipation medium during the cooling stage; the linkage design of the positioning part and the rotating shaft ensures that the corner part is accurately and stably positioned during the molding stage, avoiding displacement due to vibration and improving molding quality.

[0018] 4. High degree of automation and strong versatility: The setting of the drive component realizes the automatic control of the corner sliding without manual intervention; the synchronous transmission design of multiple guide cavities can be adapted to electrical switch panel molds with different structures, improving the versatility and applicability of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an injection molding cooling device for an electrical switch panel proposed in this invention; Figure 2 Diagram showing the shape of the protrusions and the corner of the electrical switch panel; Figure 3 Diagram showing the internal structure of the shaped protrusion and electrical switch panel; Figure 4 A structural diagram showing the internal storage state of the flow guide cavity at the corner; Figure 5 This diagram shows the connections of the corner section, the replenishment tube, and the guide tube. Figure 6 This is a connection diagram of the positioning part and the rotating shaft; Figure 7 This is a diagram showing the connection structure between the rotating shaft and the bevel gear set.

[0020] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Shaping protrusion; 30. Corner section; 31. Shaping section; 4. Flow guide cavity; 5. Heat dissipation cavity; 6. Inlet; 7. Flow guide port; 8. Flow stop flange; 9. Rotating shaft; 10. Actuating rod; 11. U-shaped stop rod; 12. Cooling cavity one; 13. Cooling cavity two; 14. Positioning section; 15. Connecting rod; 16. Liquid replenishment pipe; 17. Liquid guide pipe; 18. Bevel gear set. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Reference Figures 1-7 A cooling device for injection molding of electrical switch panels includes a moving mold 1 and a fixed mold 2. The fixed mold 2 is provided with a mold cavity for molding the electrical switch panel. When the moving mold 1 moves to the fixed mold 2 until they fit together to form a completely closed mold cavity, the molten raw material made of recycled plastic enters the mold cavity and is subsequently cooled to form the electrical switch panel.

[0024] The mold cavity is provided with a shaping protrusion 3 that is adapted to the irregular shape of the switch panel. Based on the setting of the shaping protrusion 3, the mold cavity forms a downward sidewall, as shown in the figure. Figures 2-4 Specifically, it refers to the side wall of the electrical switch panel that is set downwards and perpendicular to the horizontal plane.

[0025] Furthermore, refer to Figures 2-4 The shaping protrusion 3 includes a corner portion 30 and a shaping portion 31. The shaping portion 31 has a guide cavity 4 for receiving the corner portion 30. The inner cavity of the guide cavity 4 is larger than the corner portion 30, so that the corner portion 30 can be completely received into the guide cavity 4. The guide cavity 4 also has space for the flow of heat dissipation medium, which is a fluid or gas.

[0026] In this embodiment, the corner portion 30 slides at an angle within the shaping portion 31. Preferably, the angle between the sliding surface of the corner portion 30 and the horizontal plane of the shaping portion 31 is 30° or 45°. This angle ensures that the corner portion 30 is precisely aligned with the shaping portion 31 when it extends, and also ensures that the heat dissipation cavity 5 and the flow guiding cavity 4 formed after storage are smoothly connected.

[0027] When the corner portion 30 extends outward along the sliding inclined sidewall of the guide cavity 4, it connects with the outer wall contour of the shaping protrusion 3 to form the mold cavity wall structure to be formed; conversely, when the corner portion 30 extends inward along the sliding inclined sidewall of the guide cavity 4, the space of the original corner portion 30 is vacated, thereby forming the heat dissipation cavity 5, and the heat dissipation cavity 5 and the guide cavity 4 are connected. Then the heat dissipation medium flowing in the guide cavity 4 can directly act on the outer wall of the vertical sidewall of the injection-molded electrical switch panel through the heat dissipation cavity 5, that is, the corner end between the vertical sidewall and the horizontal sidewall of the electrical switch panel, to accelerate the cooling. When the pressure of the heat dissipation medium in the heat dissipation cavity 5 is too high, it also helps the demolding of the injection-molded electrical switch panel.

[0028] In some embodiments, the outer end of the corner portion 30 near the flow guide cavity 4 is integrally formed with an L-shaped flow-stopping flange 8, as shown in the figure. Figures 2-4 The outer end of the flow-stopping flange 8 is perpendicular to the inner wall of the flow-guiding cavity 4. A corresponding stop groove is provided on the inner wall of the flow-guiding cavity 4. When the corner part 30 extends into place, the outer side of the flow-stopping flange 8 is attached to one end of the stop groove side wall, so that the corner part 30, the sliding side wall of the flow-guiding cavity 4, and the inner cavity of the flow-guiding cavity 4 form a flow-blocking turning point. The outer end of the flow-stopping flange 8 is sealed to achieve the sealing of the flow-guiding cavity 4.

[0029] Furthermore, to ensure the stability of the corner section 30 after sliding outwards towards the flow guide cavity 4, in some other embodiments, a positioning part 14 is horizontally slidably installed within the stop groove. The positioning part 14 is a slider structure, and the outer end of the flow-stopping flange 8 is positioned between one end sidewall of the stop groove and the positioning part 14. By limiting the movement of the positioning part 14, the flow-stopping flange 8 is positioned, thereby ensuring the stability of the corner section 30 after installation.

[0030] Reference Figures 2-4 In some embodiments, the flow guiding cavity 4 is provided with a driving component for driving the corner portion 30 to slide. In this embodiment, the driving component is a rotating shaft braking component, which includes a rotating shaft 9, an actuating rod 10 and a U-shaped abutment rod 11. The rotating shaft 9 is rotatably mounted on the inner wall of the flow guiding cavity 4 through a bearing. The actuating rod 10 is fixed to the outer wall of the rotating shaft 9 by welding and rotates synchronously with the rotating shaft 9. The two ends of the U-shaped abutment rod 11 are fixed to the side wall of the corner portion 30 by bolts, and the opening of the U-shaped abutment rod 11 faces the corner portion 30.

[0031] Based on the structure of the rotating shaft braking unit, the way it drives the corner section 30 to work is as follows: the rotating shaft 9 drives the actuator rod 10 to rotate, the actuator rod 10 abuts against the side wall of the corner section 30, and pushes the corner section 30 to slide outward of the guide cavity 4 until the corner section 30 and the shaping part 31 form a completely closed outer contour of the shaping protrusion 3; conversely, the rotating shaft 9 rotates in the opposite direction, the rotating shaft 9 drives the actuator rod 10 to rotate to abut against the outer wall of the horizontal end of the U-shaped abutment rod 11, and pulls the corner section 30 to slide inward of the guide cavity 4 until the corner section 30 is completely housed in the guide cavity 4.

[0032] It should be added that the driving component can also be a gear and rack assembly or an electric linear drive, among which the electric linear drive can be a cylinder or a push rod motor.

[0033] Reference Figure 6 Based on the configuration of the rotating shaft 9, in some embodiments, the rotating shaft 9 and the positioning part 14 are connected by a connecting rod 15. One end of the connecting rod 15 is connected to the outer wall of the connecting disc at the outer end of the rotating shaft 9 by a pin. (Refer to...) Figure 6The connecting plate is provided with a sliding groove for the pin to slide. The pin is a cylindrical structure with an anti-detachment flange. The other end is hinged to the positioning part 14 through the pin. When the rotating shaft 9 rotates, the positioning part 14 is driven to slide horizontally in the stop groove through the connecting rod 15, so as to clamp or loosen the stop flange 8.

[0034] It should be added that, in some embodiments, the end of the actuator rod 10 is provided with a retractable abutment. Through the elastic movement of the abutment, the positioning part 14 unlocks the flow-stopping flange 8 and coordinates the movement of the end of the actuator rod 10 against the corner part 30. That is, when the actuator rod 10 moves to the maximum outer side of the flow guide cavity 4 against the corner part 30, it continues to rotate with the rotating shaft 9. By moving the abutment towards the end of the actuator rod 10, the position of the corner part 30 is maintained, and the positioning part 14 moves towards the flow-stopping flange 8 until it clamps the flow-stopping flange 8.

[0035] In this embodiment, the heat dissipation medium flowing inside the flow guiding cavity 4 is as follows: The flow guiding cavity 4 is also provided with an inlet 6 and a guide port 7. The inlet 6 is connected to an external heat dissipation medium supply device, such as a cooling water pump, through a pipe, and is used to replenish cooling water into the flow guiding cavity 4. In this embodiment, the heat dissipation medium is cooling water or gas, etc. The guide port 7 is connected to an external heat dissipation recovery device through a pipe, and is used to export the heat dissipation medium after heat absorption.

[0036] It should be added that the flow of the heat dissipation medium in the flow guide cavity 4 is different from other heat dissipation channels in the fixed mold 2. It adopts a separate heat dissipation medium replenishment channel, supply device and external heat dissipation recovery device.

[0037] In other embodiments, when the heat dissipation cavity 5 is not used for heat dissipation, pre-cooling can be achieved through the heat dissipation channels provided in the mold 2 and the shaping protrusion 3, as specifically configured as follows: Referring to the figure, a cooling chamber 12 is provided in the corner part 30, and a cooling chamber 23 is provided in the shaping part 31. Cooling water flows in both the cooling chamber 12 and the cooling chamber 23.

[0038] The cooling water in the cooling chamber 12 is introduced through the replenishment pipe 16 and discharged through the guide pipe 17. Both the replenishment pipe 16 and the guide pipe 17 are located within the flow guiding cavity 4, and both adopt a telescopic sleeve structure to avoid movement interference when the replenishment pipe 16 and the guide pipe 17 are retracted into the flow guiding cavity 4 at the corner 30. In addition, one end of the replenishment pipe 16 is connected to the cooling water flow channel in the fixed mold 2, and the other end is connected to the cooling chamber 12, for replenishing the cooling water flowing into the cooling chamber 12; one end of the guide pipe 17 is connected to the cooling chamber 12, and the other end is connected to the cooling water flow channel in the fixed mold 2, for discharging the cooling water from the cooling chamber 12.

[0039] Among them, the cooling chamber II 13 is also connected to the cooling water flow channel in the fixed mold 2 through an independent liquid inlet pipe and a liquid outlet pipe, so that the cooling water flows inside the shaping protrusion 3 with a complete contour, thereby cooling the preliminarily formed electrical switch panel.

[0040] In this embodiment, the number of the diversion chambers 4 on the same shaping protrusion 3 can be independently set according to the position of the corner. For example, for the side wall of the electrical switch panel extending downward in a "return" shape, the diversion chambers 4 can be set to 4, corresponding to the corners of the four vertical downward side walls of the electrical switch panel respectively. The rotating shafts 9 in the 4 diversion chambers 4 can be传动连接 (driven and connected) through a bevel gear set 18. The bevel gear set 18 includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixed on the output shaft of the driving motor, and the driven bevel gears are respectively fixed at the ends of the respective rotating shafts 9. The driving motor drives the 4 rotating shafts 9 to rotate synchronously through the bevel gear set 18, so as to realize the synchronous movement of the 4 corner parts 30.

[0041] Preferably, in some embodiments, based on the setting of the fixed mold 2, a transmission component can be used to drive the driving bevel gear to rotate. Among them, the transmission component can adopt another bevel gear meshing with the driving bevel gear, and this bevel gear is actuated to rotate through a transmission structure such as a gear rack component.

[0042] Finally, it should be noted that: cutting blades can be further arranged on the inclined inner wall of the diversion chamber 4, and the cutting blades are driven by a driving member such as a cylinder to move horizontally or vertically. When there is molten material made of recycled plastic between the diversion chamber 4 and the sliding wall of the corner part 30, the cooled and solidified material is cut off by the movement of the cutting knife, so as to avoid affecting subsequent processing.

[0043] The working process of this embodiment is as follows: 1. Injection molding stage: Start the driving motor. The driving motor drives the respective rotating shafts 9 to rotate through the bevel gear set 缉查18. The rotating shaft 缉查9 drives the actuating rod 10 to rotate. The actuating rod 10 abuts against the side wall of the corner part 30, and pushes the corner part 30 to slide obliquely outward of the diversion chamber 4 until the corner part 30 and the shaping part 31 form a complete closed outer contour of the shaping protrusion 3; At this time, the outer end side of the flow-stop flange 8 abuts against one side wall of the stop groove. At the same time, the rotating shaft 9带动 (drives) the positioning part 14 to slide towards the flow-stop flange 8 through the connecting rod 15. During this process, by moving the abutting part towards the end of the actuating rod 10, while maintaining the position of the corner part 30, the positioning part 1缉查4 moves, and the flow-stop flange 8 is clamped between the side wall of the stop groove and the positioning part 14, so as to realize the positioning and fixing of the corner part 30, and the diversion chamber 4 is in a closed state; Subsequently, the moving mold 1 and the fixed mold 2 are clamped, and the plastic molten material made from recycled waste is injected into the mold cavity to complete the injection molding.

[0044] It should be noted that there may be some inaccuracies in the above translation due to the lack of clear and accurate expressions in the original text. It is recommended to check and correct according to the actual situation.2. Cooling Stage: After injection molding, the injection-molded electrical switch panel is pre-cooled by cooling water flowing in cooling chamber 12 and cooling chamber 23, causing the vertical sidewalls of the electrical switch panel to initially set. Then, the drive motor is started in reverse, driving the rotating shaft 9 to rotate in the opposite direction. The rotating shaft 9 drives the actuator rod 10 to rotate until it abuts the outer wall of the U-shaped abutment rod 11, pulling the corner part 30 to slide tilted into the guide cavity 4 until the corner part 30 is completely housed in the guide cavity 4. During this process, the rotating shaft 9 drives the positioning part 1 through the connecting rod 15. 4. Slide away from the stop flange 8 to loosen the clamping of the stop flange 8; after the corner part 30 is retracted, its original position forms a heat dissipation cavity 5, which is connected to the guide cavity 4; start the external heat dissipation medium supply device, and the heat dissipation medium enters the guide cavity 4 through the inlet 6. A portion of the heat dissipation medium flows through the heat dissipation cavity 5, directly cooling the side wall of the corner part of the injection molded part; the heat-absorbing heat dissipation medium is discharged to the external heat dissipation recovery device through the guide port 7; after cooling is completed, the moving mold 1 and the fixed mold 2 open, and the molded electrical switch panel is taken out. Among them, the pressure of the heat dissipation medium in the heat dissipation cavity 5 can be controlled to facilitate the demolding of the electrical switch panel.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cooling device for injection molding of electrical switch panels, comprising a moving mold (1) and a fixed mold (2), characterized in that, The fixed mold (2) is provided with a mold cavity, and molten waste plastic is injected to form the shape of an electrical switch panel; The mold cavity is provided with a shaping protrusion (3), the shaping protrusion (3) includes a corner part (30) and a shaping part (31), and the shaping part (31) is provided with a guide cavity (4) for receiving the corner part (30). When the corner portion (30) and the shaping portion (31) form a completely closed outer contour of the shaping protrusion (3), the guide cavity (4) is closed; When the corner portion (30) is retracted into the flow guide cavity (4), the flow guide cavity (4) is opened, and a heat dissipation cavity (5) is formed at the original position of the corner portion (30), and the heat dissipation cavity (5) and the flow guide cavity (4) are connected. The flow guide cavity (4) is provided with an inlet (6) and a flow guide (7). The inlet (6) replenishes the heat dissipation medium into the flow guide cavity (4), and the flow guide (7) discharges the heat dissipation medium.

2. The electrical switch panel injection molding cooling device according to claim 1, characterized in that, The corner portion (30) slides at an angle within the shaping portion (31), and the sliding surface of the corner portion (30) is inclined to the horizontal plane of the shaping portion (31).

3. The electrical switch panel injection molding cooling device according to claim 2, characterized in that, The outer end of the corner portion (30) is provided with a flow-stopping flange (8), the cross section of the flow-stopping flange (8) is L-shaped, and the outer end of the flow-stopping flange (8) is perpendicular to the inner wall of the flow-guiding cavity (4).

4. The electrical switch panel injection molding cooling device according to claim 3, characterized in that, The inner wall of the flow guide cavity (4) is provided with a stop groove, and the outer end side of the stop flange (8) is attached to one end side wall of the stop groove.

5. The electrical switch panel injection molding cooling device according to claim 4, characterized in that, A positioning part (14) slides horizontally within the stop groove, and the outer end of the flow-stopping flange (8) is positioned between one end sidewall of the stop groove and the positioning part (14).

6. The electrical switch panel injection molding cooling device according to claim 5, characterized in that, The guide cavity (4) is provided with a driving component that drives the corner part (30) to slide.

7. The electrical switch panel injection molding cooling device according to claim 6, characterized in that, The driving component is an electric linear drive or a rotating shaft braking unit; The rotating shaft braking unit includes: The rotating shaft (9) rotates on the inner wall of the guide cavity (4); The actuator rod (10) is fixed on the outer wall of the rotating shaft (9) and rotates with the rotating shaft (9); U-shaped abutment (11), both ends of which are fixed to the side wall of the corner part (30); As the shaft (9) rotates, when the actuating rod (10) abuts against the side wall of the corner portion (30), the corner portion (30) moves outward from the guide cavity (4); when the actuating rod (10) abuts against the outer wall of the U-shaped abutment (11), the corner portion (30) moves inward from the guide cavity (4).

8. The electrical switch panel injection molding cooling device according to claim 7, characterized in that, The rotating shaft (9) and the positioning part (14) are connected by a connecting member, which is a connecting rod (15). As the rotating shaft (9) rotates, the positioning part (14) slides horizontally in the stop groove.

9. The electrical switch panel injection molding cooling device according to claim 8, characterized in that, There are multiple flow guide cavities (4), and the rotating shafts (9) in the multiple flow guide cavities (4) are connected by a bevel gear set (18).

10. The electrical switch panel injection molding cooling device according to claim 1, characterized in that, Cooling chamber one (12) and cooling chamber two (13) are respectively provided on the corner part (30) and the shaping part (31), and heat dissipation liquid flows in the cooling chamber one (12) and the cooling chamber two (13); The flow guide cavity (4) is provided with a liquid replenishment pipe (16) and a liquid guide pipe (17), and both the liquid replenishment pipe (16) and the liquid guide pipe (17) are telescopic sleeve structures used to constrain the sliding of the corner part (30). The liquid replenishment pipe (16) replenishes the heat dissipation liquid into the first cooling cavity (12), and the liquid guide pipe (17) discharges the heat dissipation liquid from the first cooling cavity (12).

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