Notebook computer shell cooling mechanism aiming at injection molding shrinkage cavity defect

Abstract

The utility model discloses a notebook computer shell cooling mechanism aiming at the injection molding shrinkage cavity defect, which comprises a main body, an injection molding chamber is arranged at the upper end in the main body, an air cylinder is arranged at the upper end of the injection molding chamber, an upper mold is arranged at the output end of the air cylinder, and a lower mold is arranged in the middle of the lower end in the injection molding chamber. The water cavity is formed in the lower end of the interior of the main body, a first cooling cavity is formed in the water cavity lower mold, and the first cooling cavity is connected with the water cavity through a water return pipe. According to the notebook computer shell cooling mechanism for the injection molding shrinkage cavity defect, it is ensured that the lower mold can keep uniform temperature distribution in the whole cooling process, the upper mold can be cooled as well, and the problem that shrinkage cavities are likely to be formed in a notebook computer shell due to the fact that the temperature difference is too large when the upper mold and the lower mold are cooled is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of notebook shell production, in particular to a notebook shell cooling mechanism for injection molding shrinkage cavity defects. Background Art

[0002] A laptop is a small, portable personal computer. It is usually thin and light, and has many of the same components as a desktop computer. Compared with a desktop computer, the main difference between a laptop and a desktop computer is its portability and compactness. The laptop shell not only protects the delicate electronic components inside, but also directly determines the appearance and durability of the product. In order to make a sturdy, beautiful shell that meets the heat dissipation requirements, injection molding technology is usually used. The cooling mechanism can quickly take away the heat from the shell surface, so that the shell quickly cools down to a stable state after molding.

[0003] The existing Chinese patent with announcement number CN211807525U discloses an injection molding mold for a laptop computer shell, including a limiting mechanism and a baffle, a transmission mechanism is arranged on the left side of the top of the limiting mechanism, and a cooling mechanism is installed in the middle of the top of the limiting mechanism, the top outer wall of the cooling mechanism is connected with a lower mold, and a second threaded rod is fixed on the right side of the top of the limiting mechanism.

[0004] Although the above-mentioned device can cool the laptop casing, it only cools the lower mold. The uneven temperature distribution of the upper and lower molds will lead to inconsistent cooling speeds of the plastic melt in the mold. The faster cooling speed of the lower mold may cause the melt to solidify rapidly in a local area and form shrinkage holes. Therefore, it does not meet the existing needs. In this regard, we propose a laptop casing cooling mechanism for injection molding shrinkage defects. Utility Model Content

[0005] The utility model aims to provide a cooling mechanism for a laptop shell for injection molding shrinkage defects, so as to solve the problem that shrinkage holes are easily formed due to the large temperature difference between the upper and lower molds of the laptop shell cooling mechanism proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling mechanism for a laptop shell for injection molding shrinkage defects, comprising a main body, an injection molding chamber is provided at the upper end of the main body, a cylinder is provided at the upper end of the injection molding chamber, an upper mold is provided at the output end of the cylinder, and a lower mold is provided at the middle position of the lower end of the injection molding chamber;

[0007] It also includes a water cavity, which is opened at the lower end of the main body, and a first cooling cavity is opened inside the mold below the water cavity, and the first cooling cavity is connected to the water cavity through a return pipe;

[0008] It also includes a second cooling cavity, which is opened inside the upper mold, and a plurality of equidistantly distributed metal fins are arranged at the upper and lower ends of the second cooling cavity.

[0009] Preferably, two serpentine heat exchange tubes are arranged inside the water cavity, and the serpentine heat exchange tubes are connected to each other through a connecting tube, and one of the serpentine heat exchange tubes is connected to the injection molding chamber through an air inlet pipe.

[0010] Preferably, a fan is provided on one side of the water cavity, and the fan is connected to the second cooling cavity and one of the serpentine heat exchange tubes through an air outlet pipe.

[0011] Preferably, a submersible pump is provided on one side of the lower end of the water cavity, and the submersible pump is connected to the first cooling cavity via a water inlet pipe.

[0012] Preferably, a refrigeration mechanism is provided at the lower end of the water chamber.

[0013] Preferably, a rock wool board is provided outside the injection molding chamber.

[0014] Preferably, a sealing door is installed on one side of the front end of the main body.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model opens a first cooling cavity inside the lower mold. When cooling is performed after injection molding, a submersible pump can be started. The submersible pump can input the coolant in the water cavity into the first cooling cavity through the water inlet pipe. When the coolant flows in the first cooling cavity, the temperature of the lower mold can be reduced, thereby achieving rapid cooling of the lower mold. Subsequently, the coolant can enter the water cavity again through the return pipe. Since the coolant can continuously take away the heat of the lower mold during the circulation process, it ensures that the lower mold can maintain a relatively uniform temperature distribution during the entire cooling process, which helps to improve the cooling effect and effectively avoid the shrinkage problem of the notebook shell caused by excessively high local temperature of the mold.

[0017] 2. The utility model arranges two serpentine heat exchange tubes inside the water cavity. When the lower mold is cooled, the fan can be started. The fan will suck the air in the injection molding room into the serpentine heat exchange tube, and exchange heat with the coolant through the serpentine heat exchange tube, so that the air temperature can be reduced. Then, the cold air can be input into the second cooling cavity inside the upper mold. The metal fins arranged in the second cooling cavity have good thermal conductivity and can quickly transfer the low temperature of the cold air to the surface of the upper mold, so that the upper mold can be cooled in the same way, avoiding the problem of shrinkage holes easily forming on the notebook shell due to excessive temperature difference when the upper and lower molds are cooled.

[0018] 3. The utility model provides a rock wool board outside the injection molding chamber. When cooling is performed, the sealed door can be closed to prevent the escape of cold air. At the same time, the rock wool board, as an excellent thermal insulation material, has low thermal conductivity and effectively blocks the transfer of external heat to the inside of the injection molding chamber, thereby further enhancing the cooling effect. The provision of the rock wool board and the closing of the sealed door together form a closed and stable cooling environment. By ensuring the stability of the cooling environment, the situation where the local temperature of the upper and lower molds is too high is effectively avoided, thereby greatly reducing the incidence of shrinkage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the internal structure of the utility model;

[0020] Figure 2 It is a front view schematic diagram of the overall structure of the utility model;

[0021] Figure 3 It is a top view schematic diagram of the internal structure of the utility model;

[0022] Figure 4 For the utility model Figure 1 A partial enlarged view of area A.

[0023] In the figure: 1. main body; 2. sealing door; 3. cylinder; 4. upper mold; 5. lower mold; 6. water cavity; 7. refrigeration mechanism; 8. first cooling cavity; 9. submersible pump; 10. water inlet pipe; 11. water return pipe; 12. air inlet pipe; 13. serpentine heat exchange tube; 14. connecting pipe; 15. fan; 16. air outlet pipe; 17. second cooling cavity; 18. metal fin; 19. rock wool board; 20. injection molding room. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: a cooling mechanism for a laptop shell for injection shrinkage defects, comprising a main body 1, an injection molding chamber 20 is provided at the upper end of the main body 1, a cylinder 3 is provided at the upper end of the injection molding chamber 20, an upper mold 4 is provided at the output end of the cylinder 3, and a lower mold 5 is provided at the middle position of the lower end of the injection molding chamber 20;

[0026] It also includes a water cavity 6, which is opened at the lower end of the main body 1. A first cooling cavity 8 is opened inside the mold 5 below the water cavity 6. The first cooling cavity 8 is connected to the water cavity 6 through a return pipe 11.

[0027] The second cooling cavity 17 is also included, which is opened inside the upper mold 4. A plurality of equidistantly distributed metal fins 18 are disposed at the upper and lower ends of the second cooling cavity 17.

[0028] When in use, after the injection molding of the notebook shell is completed, the sealing door 2 is closed and the submersible pump 9 is started. The refrigerant in the water cavity 6 is sent to the first cooling cavity 8 through the water inlet pipe 10 to cool the lower mold 5. The return pipe 11 ensures that the coolant circulates back to the water cavity 6 to maintain the uniform temperature distribution of the lower mold 5. At the same time, the fan 15 is started, and the air inlet pipe 12 sucks the air in the injection chamber 20 into the serpentine heat exchange tube 13 for heat exchange, lowering the air temperature. Then the air outlet pipe 16 transports the cold air to the second cooling cavity 17, and the low temperature is quickly transferred to the surface of the upper mold 4 through the metal fins 18. The cold air enters the injection chamber 20 through the vent again, realizing the synchronous cooling of the upper mold 4 and the lower mold 5, avoiding the problem of shrinkage holes easily forming on the notebook shell due to excessive temperature difference between the upper mold 4 and the lower mold 5 when cooling.

[0029] See also Figure 1 and Figure 3 Two serpentine heat exchange tubes 13 are arranged inside the water cavity 6, and the serpentine heat exchange tubes 13 are connected by connecting tubes 14, and one of the serpentine heat exchange tubes 13 is connected to the injection chamber 20 by an air inlet pipe 12. The serpentine structure of the serpentine heat exchange tube 13 increases the contact area between air and refrigerant, improves the heat exchange efficiency, thereby more effectively reducing the air temperature and providing sufficient cooling effect for the upper mold 4;

[0030] See also Figure 1 and Figure 3 A fan 15 is provided on one side of the water chamber 6. The fan 15 is connected to the second cooling chamber 17 and one of the serpentine heat exchange tubes 13 through an air outlet pipe 16. The start of the fan 15 accelerates the flow of air in the serpentine heat exchange tube 13, improves the heat exchange rate, and also ensures that the cold air can be evenly and quickly transported to the second cooling chamber 17, providing efficient cooling for the upper mold 4.

[0031] See also Figure 1 and Figure 3 A submersible pump 9 is provided on one side of the lower end of the water cavity 6. The submersible pump 9 is connected to the first cooling cavity 8 through a water inlet pipe 10. The submersible pump 9 ensures that the coolant can flow into the first cooling cavity 8 continuously and stably, providing a continuous and uniform cooling effect for the lower mold 5, thereby improving the cooling efficiency.

[0032] See also Figure 1A refrigeration mechanism 7 is provided at the lower end of the water chamber 6, and the refrigeration mechanism 7 ensures that the coolant always maintains a low temperature state, thereby ensuring the continuity and stability of the cooling effect and improving the cooling efficiency;

[0033] See also Figure 1 A rock wool board 19 is arranged outside the injection molding chamber 20. The rock wool board 19 has good heat insulation performance and can effectively block the external heat from being transferred to the inside of the injection molding chamber, thereby maintaining the stability of the cooling environment and ensuring cooling;

[0034] See also Figure 2 A sealed door 2 is installed on one side of the front end of the main body 1. Closing the sealed door 2 can prevent the escape of cold air during the cooling process, ensure the closedness and stability of the cooling environment, and also avoid the entry of external heat and pollutants, thereby ensuring the quality of the product and the smooth progress of production.

[0035] Working principle: When in use, the laptop shell injection molding mechanism is carried out through the injection hole at the upper end of the upper mold 4. After the injection molding is completed, the sealing door 2 is closed and the submersible pump 9 is started. The submersible pump 9 will input the refrigerant in the water cavity 6 into the first cooling cavity 8 through the water inlet pipe 10 to cool the lower mold 5. The coolant can be returned to the water cavity 6 through the return pipe 11. Since the coolant can continuously take away the heat of the lower mold 5 during the circulation process, it is ensured that the lower mold 5 can maintain a relatively uniform temperature distribution during the entire cooling process. The refrigeration mechanism 7 ensures the cooling effect of the refrigerant. When the lower mold 5 is cooled, the fan 15 is started, and the air inlet pipe 12 will suck the air inside the injection chamber 20 into the serpentine heat exchange tube 13. When the air flows through the serpentine heat exchange tube 13, it can exchange heat with the external coolant, thereby reducing the air temperature. The setting of the two serpentine heat exchange tubes 13 ensures The air cooling effect is achieved, and then the cold air can be transported to the inside of the second cooling chamber 17 through the air outlet pipe 16. The low temperature of the cold air can be quickly transferred to the surface of the upper mold 4 through the multiple metal fins 18 arranged in the second cooling chamber 17. The cold air will re-enter the injection molding chamber 20 through the air vents on one side of the upper end of the second cooling chamber 17, so that the cold air can circulate in the upper mold 4 synchronously, and the upper mold 4 and the lower mold 5 can be cooled synchronously, avoiding the problem of shrinkage holes easily forming on the notebook casing due to the large temperature difference between the upper mold 4 and the lower mold 5 when cooling. During cooling, the sealing door 2 is closed to avoid the escape of cold air. The rock wool board 19 effectively blocks the transfer of external heat to the inside of the injection molding chamber 20. The closing of the rock wool board 19 and the sealing door 2 jointly forms a closed and stable cooling environment, reducing the incidence of shrinkage holes.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cooling mechanism for a laptop shell for injection molding shrinkage defects, comprising a main body (1), an injection molding chamber (20) is provided at the upper end of the main body (1), a cylinder (3) is provided at the upper end of the injection molding chamber (20), an upper mold (4) is provided at the output end of the cylinder (3), and a lower mold (5) is provided at the middle position of the lower end of the injection molding chamber (20), characterized in that: It also includes a water cavity (6) which is opened at the lower end of the main body (1); a first cooling cavity (8) is opened inside the mold (5) below the water cavity (6); the first cooling cavity (8) is connected to the water cavity (6) via a return pipe (11); It also comprises a second cooling cavity (17) which is opened inside the upper mold (4), and a plurality of equidistantly distributed metal fins (18) are arranged at the upper and lower ends of the second cooling cavity (17).

2. The notebook shell cooling mechanism for injection molding shrinkage defects according to claim 1, characterized in that: Two serpentine heat exchange tubes (13) are arranged inside the water cavity (6), and the serpentine heat exchange tubes (13) are connected to each other via a connecting tube (14), and one of the serpentine heat exchange tubes (13) is connected to the injection molding chamber (20) via an air inlet pipe (12).

3. The cooling mechanism for a laptop shell against injection molding shrinkage defects according to claim 2, characterized in that: A fan (15) is provided on one side of the water chamber (6), and the fan (15) is connected to the second cooling chamber (17) and one of the serpentine heat exchange tubes (13) via an air outlet pipe (16).

4. The notebook shell cooling mechanism for injection molding shrinkage defects according to claim 1, characterized in that: A submersible pump (9) is provided on one side of the lower end of the water chamber (6), and the submersible pump (9) is connected to the first cooling chamber (8) via a water inlet pipe (10).

5. The notebook shell cooling mechanism for injection molding shrinkage defects according to claim 1, characterized in that: A refrigeration mechanism (7) is provided at the lower end of the water chamber (6).

6. The notebook casing cooling mechanism for injection molding shrinkage defects according to claim 1, characterized in that: A rock wool board (19) is arranged outside the injection molding chamber (20).

7. The notebook shell cooling mechanism for injection molding shrinkage defects according to claim 1, characterized in that: A sealing door (2) is installed on one side of the front end of the main body (1).

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