An injection mold for injection molding a sealing ring on a battery box based on liquid silicone injection molding.

Abstract

This utility model discloses an injection mold for injection molding a sealing ring onto a battery box based on liquid silicone injection molding. This utility model relates to the technical field of injection mold structures. It includes an upper mold B and a lower mold B. The lower mold B includes a second base and a second loading plate. The second loading plate is embedded in the second base. Multiple spaced receiving grooves are formed along the length of the top surface of the second loading plate. The receiving grooves fit with the outer contour of the flat plate of the battery box. A central channel communicating with the receiving groove is formed between each two adjacent receiving grooves. Multiple longitudinally arranged heat-conducting copper blocks are fixed to the bottom of each receiving groove. Multiple vent holes penetrating the left and right ends of each heat-conducting copper block are formed within it. The beneficial effects of this utility model are: it can effectively avoid deformation of the rectangular cover during the injection molding of the sealing ring onto the battery box and greatly improve the injection molding quality.

Description

Technical Field

[0001] This utility model relates to the technical field of injection mold structure, and in particular to an injection mold for injection molding a sealing ring on a battery box based on liquid silicone injection molding. Background Technology

[0002] The structure of a certain model of battery box is as follows: Figures 1-2 As shown, the battery box includes a flat plate 1 and a rectangular shell 2 fixed to the top surface of the flat plate 1. A ring-shaped groove 3 is formed along the circumference of the top surface of the rectangular shell 2. Manufacturing requires that a sealing ring 4 be injection-molded into the ring-shaped groove 3 of each battery box. The structure of the battery box with the injection-molded sealing ring 4 is as follows: Figures 3-4 As shown.

[0003] A certain workshop uses, for example Figures 5-9 The injection mold shown is used to inject a sealing ring 4 into the annular recess 3 of the battery box. The injection mold includes an upper mold A5 and a lower mold A6. The lower mold A6 includes a first base 7 and a first loading plate 8. The first loading plate 8 is embedded in the first base 7. A plurality of receiving grooves 9 are formed on the top surface of the first loading plate 8. The receiving grooves 9 match the outer contour of the flat plate 1 of the battery box.

[0004] The upper mold A5 includes an upper support 10, a pad 11, and a fixing plate 12, which are fixedly mounted together from top to bottom. A fastening plate 13 is fixedly mounted inside the fixing plate 12. Multiple annular grooves 14 are formed on the bottom surface of the fastening plate 13, and each annular groove 14 corresponds to a receiving groove 9. Multiple injection holes A15 are formed between the upper support 10, the pad 11, the fixing plate 12, and the fastening plate 13. The lower end of each injection hole A15 is connected to each annular groove 14, and the upper end of each injection hole A15 penetrates the top surface of the upper support 10.

[0005] The method for injection molding a sealing ring 4 into the annular groove 3 of the battery box using this injection mold is as follows:

[0006] S1. The worker fixes the upper support 10 of the upper mold A5 onto the piston rod of the press, thereby completing the installation of the upper mold A5. Figure 10 As shown, at this time, the snap-fit ​​plate 13 of the upper mold A5 is directly above the first loading plate 8 of the lower mold A6;

[0007] S2. The worker places a [item] into each of the receiving slots 9 of the first loading plate 8. Figures 1-2 The battery box shown is as follows: Figure 11 As shown, the battery box is positioned by matching the outer contour of the flat plate 1 with the receiving groove 9. At this time, the annular groove 3 of the battery box and the annular groove 14 of the fastening plate 13 are directly opposite each other.

[0008] S3. The worker controls the piston rod of the press to extend downwards. The piston rod drives the upper support 10 to move downwards. The upper support 10 drives the pad 11, the fixing plate 12, and the fastening plate 13 to move downwards synchronously. When the piston rod of the press extends downwards to a set distance, the bottom surface of the fastening plate 13 contacts the top surface of the rectangular shell 2 of the battery box. At the same time, the annular groove 14 of the fastening plate 13 and the annular recess 3 of the battery box form a sealed annular cavity. Figures 12-13 As shown, the annular sealed cavity is connected to the injection hole A15;

[0009] S4. A certain amount of liquid silicone is injected into the upper port of each injection hole A15 through the injection molding machine. The liquid silicone passes through the injection hole A15 and the lower port of the injection hole A15, and finally enters the sealed annular cavity. The liquid silicone fills the sealed annular cavity to form a sealing ring 4. After cooling for a period of time, a sealing ring 4 is finally injected into multiple battery boxes.

[0010] S5. The specific steps for removing the battery box with the injection-molded sealing ring 4 are as follows:

[0011] S51, control the piston rod of the press to retract upward, the piston rod drives the upper support 10 to move upward, the upper support 10 drives the pad 11, the fixed plate 12 and the fastening plate 13 to move upward synchronously, so that the fastening plate 13 is reset;

[0012] S52. The worker removes the battery box with the sealing ring 4 from the receiving groove 9 from the first loading plate 8.

[0013] S6. Workers repeat steps S2 to S5 to mold a sealing ring 4 onto all battery boxes.

[0014] However, although this injection mold can mold a sealing ring 4 within the annular groove 3 of the battery box, the following technical defects still emerge in actual operation:

[0015] In step S4, since the temperature of liquid silicone is as high as 80-90°C, when the liquid silicone is injected into the sealed annular cavity, the liquid silicone transfers its own heat to the rectangular shell 2 of the battery box, causing the rectangular shell 2 to deform due to heat. However, the process requires that the rectangular shell 2 of the battery box should not deform after injection molding. Therefore, this injection mold does not have the function of preventing the rectangular shell 2 of the battery box from deforming, resulting in a technical defect of low injection molding quality.

[0016] Therefore, there is an urgent need for an injection mold that can effectively prevent the deformation of the rectangular cover during the injection molding of the sealing ring on the battery box and greatly improve the injection molding quality. Utility Model Content

[0017] The purpose of this invention is to overcome the shortcomings of the prior art and provide an injection mold based on liquid silicone injection molding for injection molding sealing rings on battery boxes, which can effectively avoid deformation of the rectangular cover during the injection molding of sealing rings on battery boxes and greatly improve the injection molding quality.

[0018] The purpose of this utility model is achieved through the following technical solution: an injection mold for injection molding a sealing ring on a battery box based on liquid silicone injection molding, which includes an upper mold B and a lower mold B. The lower mold B includes a second base and a second loading plate. The second loading plate is embedded in the second base. Multiple spaced receiving grooves are opened on the top surface of the second loading plate along its length direction. The receiving grooves are matched with the outer contour of the flat plate of the battery box. An intermediate channel connected to the receiving groove is opened between each two adjacent receiving grooves. Multiple longitudinally arranged heat-conducting copper blocks are fixed at the bottom of each receiving groove. Multiple air holes penetrating the left and right end faces of the heat-conducting copper blocks are opened in the heat-conducting copper blocks.

[0019] The second loading plate has horizontal through holes on both the left and right side walls. The horizontal through hole on the left is connected to the leftmost receiving groove, and the horizontal through hole on the right is connected to the rightmost receiving groove. The second base has air inlet and air outlet holes on its left and right side walls, respectively, and the air inlet and air outlet holes are connected to the two horizontal through holes.

[0020] The top surface of the second loading plate is flush with the top surface of the second base.

[0021] All the heat-conducting copper blocks have the same height and the same length.

[0022] Both the air inlet and the air outlet are connected to connectors, and each connector is connected to a flexible hose.

[0023] The upper mold B includes an upper support, a pad, and a fixing plate that are fixed together from top to bottom. A fastening plate is fixed inside the fixing plate. Multiple annular grooves are formed on the bottom surface of the fastening plate, and each annular groove corresponds to a receiving groove. Multiple injection holes B are formed between the upper support, the pad, the fixing plate, and the fastening plate. The lower end of each injection hole B is connected to each annular groove, and the upper end of each injection hole B penetrates the top surface of the upper support.

[0024] This invention has the following advantages: it can effectively prevent the rectangular cover from deforming during the injection molding of the sealing ring on the battery box and greatly improve the injection molding quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the battery box structure;

[0026] Figure 2 for Figure 1 Main section diagram;

[0027] Figure 3 A schematic diagram of injection molding a sealing ring within the annular groove of the battery box;

[0028] Figure 4 for Figure 3 Main section diagram;

[0029] Figure 5 This is a schematic diagram of the lower mold A of an existing injection mold.

[0030] Figure 6 for Figure 5 A schematic diagram of the structure of the first loading plate in the process;

[0031] Figure 7 This is a schematic diagram of the upper mold A of an existing injection mold.

[0032] Figure 8 for Figure 7 A schematic diagram of the interlocking plate in the middle;

[0033] Figure 9 for Figure 7 A magnified view of part I;

[0034] Figure 10 A schematic diagram illustrating the installation of the upper mold A;

[0035] Figure 11 A schematic diagram showing workers placing a battery box into each of the receiving slots on the first loading plate;

[0036] Figure 12 A schematic diagram showing the annular groove of the fastening plate and the annular recess of the battery box forming a closed annular cavity;

[0037] Figure 13 for Figure 12 Enlarged view of part II;

[0038] Figure 14 This is a schematic diagram of the lower mold B of this utility model;

[0039] Figure 15 This is a schematic diagram of the structure of the heat-conducting copper block;

[0040] Figure 16 for Figure 15 Main section diagram;

[0041] Figure 17 This is a schematic diagram of the upper mold B of this utility model;

[0042] Figure 18 for Figure 17 A magnified view of part III;

[0043] Figure 19A schematic diagram illustrating the installation of the upper mold B;

[0044] Figure 20 A schematic diagram showing how a battery box is placed in each of the receiving slots of the second loading plate;

[0045] Figure 21 This is a schematic diagram showing that the annular groove of the fastening plate and the annular recess of the battery box form a closed annular cavity.

[0046] Figure 22 for Figure 21 A magnified view of part IV;

[0047] In the picture:

[0048] 1-Flat plate, 2-Rectangular shell, 3-Annular groove, 4-Sealing ring, 5-Upper mold A, 6-Lower mold A, 7-First base, 8-First loading plate, 9-Receiving groove, 10-Upper support, 11-Pad plate, 12-Fixing plate, 13-Snap-fit ​​plate, 14-Annular groove, 15-Injection hole A;

[0049] 16-Upper mold B, 17-Lower mold B, 18-Second base, 19-Second loading plate, 20-Intermediate channel, 21-Heat-conducting copper block, 22-Vent hole, 23-Horizontal through hole, 24-Inlet hole, 25-Outlet hole, 26-Hose, 27-Injection hole B. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0051] like Figures 14-18 As shown, an injection mold for injection molding a sealing ring onto a battery box based on liquid silicone injection molding includes an upper mold B16 and a lower mold B17. The lower mold B17 includes a second base 18 and a second loading plate 19. The second loading plate 19 is embedded in the second base 18, and the top surface of the second loading plate 19 is flush with the top surface of the second base 18. Multiple spaced receiving grooves 9 are formed along the length of the top surface of the second loading plate 19. The receiving grooves 9 fit with the outer contour of the flat plate 1 of the battery box. A middle channel 20 communicating with each adjacent two receiving grooves 9 is formed between them. Multiple longitudinally arranged heat-conducting copper blocks 21 are fixed to the bottom of each receiving groove 9. Multiple air holes 22 penetrating the left and right ends of each heat-conducting copper block 21 are formed within it.

[0052] The second loading plate 19 has horizontal through holes 23 on both its left and right side walls. The horizontal through hole 23 on the left side is connected to the leftmost receiving groove 9, and the horizontal through hole 23 on the right side is connected to the rightmost receiving groove 9. The second base 18 has air inlets 24 and air outlets 25 on its left and right side walls, respectively, and these air inlets 24 and air outlets 25 are connected to the two horizontal through holes 23. All heat-conducting copper blocks 21 have the same height and the same length. Connectors are attached to both the air inlets 24 and air outlets 25, and a flexible hose 26 is connected to each connector.

[0053] The upper mold B16 includes an upper support 10, a pad 11, and a fixing plate 12, which are fixedly mounted together from top to bottom. A fastening plate 13 is fixedly mounted inside the fixing plate 12. Multiple annular grooves 14 are formed on the bottom surface of the fastening plate 13, and each annular groove 14 corresponds to a receiving groove 9. Multiple injection holes B27 are formed between the upper support 10, the pad 11, the fixing plate 12, and the fastening plate 13. The lower end of each injection hole B27 is connected to each annular groove 14, and the upper end of each injection hole B27 penetrates the top surface of the upper support 10.

[0054] The working process of this utility model is as follows:

[0055] S1. The worker connects the first end of the left hose 26 to the gas supply end of the nitrogen cylinder's exhaust valve; the worker connects the first end of the right hose 26 to the nitrogen collection tank.

[0056] S2. The worker fixes the upper support 10 of the upper mold B16 onto the piston rod of the press, thereby completing the installation of the upper mold B16. Figure 19 As shown, at this time, the snap-fit ​​plate 13 of the upper mold B16 is directly above the second loading plate 19 of the lower mold B17;

[0057] S3. The worker places a [item] into each of the receiving slots 9 of the second loading plate 19. Figures 1-2 The battery box is shown, and the plate 1 of the battery box is supported on the top surface of the heat-conducting copper block 21, as shown. Figure 20 As shown, the battery box is positioned by matching the outer contour of the flat plate 1 with the receiving groove 9. At this time, the annular groove 3 of the battery box and the annular groove 14 of the fastening plate 13 are directly opposite each other.

[0058] S4. The worker controls the piston rod of the press to extend downwards. The piston rod drives the upper support 10 to move downwards. The upper support 10 drives the pad 11, the fixing plate 12, and the fastening plate 13 to move downwards synchronously. When the piston rod of the press extends downwards to a set distance, the bottom surface of the fastening plate 13 contacts the top surface of the rectangular shell 2 of the battery box. At the same time, the annular groove 14 of the fastening plate 13 and the annular recess 3 of the battery box form a sealed annular cavity. Figures 21-22 As shown, the annular sealed cavity is connected to the injection hole B27;

[0059] S5. The worker opens the exhaust valve on the nitrogen cylinder. The low-temperature nitrogen in the nitrogen cylinder passes through the exhaust valve, the left hose 26, the air inlet 24, the left horizontal through hole 23, the air passage 22 of each heat-conducting copper block 21, the middle channel 20, the right horizontal through hole 23, the right hose 26, and finally is recovered into the nitrogen collection tank.

[0060] S6. A certain amount of liquid silicone is injected into the upper port of each injection hole B27 through the injection molding machine. The liquid silicone passes through the injection hole B27 and the lower port of the injection hole B27, and finally enters the sealed annular cavity. The liquid silicone fills the sealed annular cavity to form a sealing ring 4, thus achieving the final injection molding of a sealing ring 4 on multiple battery boxes.

[0061] As can be seen from steps S5-S6, when the liquid silicone enters the sealed annular cavity, the heat from the liquid silicone is transferred to the rectangular shell 2 of the battery box. The rectangular shell 2 then transfers the heat to the heat-conducting copper block 21. The low-temperature nitrogen gas passing through the heat-conducting copper block 21 carries the heat away from the copper block 21 to the right, and finally, the heated nitrogen gas is collected in the nitrogen collection tank. Therefore, the heat transferred from the liquid silicone to the rectangular shell 2 of the battery box is directly dissipated by the low-temperature nitrogen gas emitted from the nitrogen cylinder, achieving the purpose of reducing the surface temperature of the rectangular shell 2. Compared to... Figures 5-13 The injection mold shown effectively prevents the rectangular shell 2 from deforming during the injection molding of the sealing ring on the battery box, thereby greatly improving the injection molding quality.

[0062] S7. The specific steps for removing the battery compartment with the injection-molded sealing ring 4 are as follows:

[0063] S71. Close the vent valve on the nitrogen cylinder;

[0064] S72. Control the piston rod of the press to retract upwards. The piston rod drives the upper support 10 to move upwards. The upper support 10 drives the pad 11, the fixing plate 12 and the fastening plate 13 to move upwards synchronously so that the fastening plate 13 is reset.

[0065] S73. The worker removes the battery box with the sealing ring 4 from the receiving groove 9 from the first loading plate 8.

[0066] S8. Workers repeat steps S3 to S7 to mold a sealing ring 4 onto all battery boxes.

Claims

1. An injection mold for injection molding a sealing ring onto a battery box based on liquid silicone injection molding, characterized in that: It includes an upper mold B (16) and a lower mold B (17). The lower mold B (17) includes a second base (18) and a second loading plate (19). The second loading plate (19) is embedded in the second base (18). The top surface of the second loading plate (19) has multiple spaced receiving grooves (9) along its length. The receiving grooves (9) are matched with the outer contour of the flat plate (1) of the battery box. A middle channel (20) connected to the receiving grooves (9) is opened between each two adjacent receiving grooves (9). Multiple longitudinally arranged heat-conducting copper blocks (21) are fixed at the bottom of each receiving groove (9). Multiple air holes (22) penetrating the left and right end faces of the heat-conducting copper blocks (21) are opened in the heat-conducting copper blocks (21). The second loading plate (19) has horizontal through holes (23) on both the left and right side walls. The horizontal through hole (23) on the left side is connected to the leftmost receiving groove (9), and the horizontal through hole (23) on the right side is connected to the rightmost receiving groove (9). The second base (18) has air inlet (24) and air outlet (25) on its left and right side walls, respectively. The air inlet (24) and air outlet (25) are connected to the two horizontal through holes (23) respectively.

2. The injection mold for injection molding a sealing ring on a battery box based on liquid silicone, according to claim 1, characterized in that: The top surface of the second loading plate (19) is flush with the top surface of the second base (18).

3. The injection mold for injection molding a sealing ring on a battery box based on liquid silicone, according to claim 1, characterized in that: Each heat-conducting copper block (21) has the same height and the same length.

4. The injection mold for injection molding a sealing ring on a battery box based on liquid silicone, according to claim 1, characterized in that: Both the air inlet (24) and the air outlet (25) are connected to connectors, and each connector is connected to a flexible hose (26).

5. The injection mold for injection molding a sealing ring on a battery box based on liquid silicone injection molding according to claim 1, characterized in that: The upper mold B (16) includes an upper support (10), a pad (11), and a fixing plate (12) that are fixed together from top to bottom. A fastening plate (13) is fixed inside the fixing plate (12). Multiple annular grooves (14) are opened on the bottom surface of the fastening plate (13), and each annular groove (14) corresponds to each receiving groove (9). Multiple injection holes B (27) are opened between the upper support (10), the pad (11), the fixing plate (12), and the fastening plate (13). The lower end of each injection hole B (27) is connected to each annular groove (14), and the upper end of each injection hole B (27) penetrates the top surface of the upper support (10).

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