An ejection structure for injection molding of a lithium battery plastic casing

Abstract

This utility model relates to the field of injection mold technology and discloses an ejection structure for injection molding of lithium battery plastic shells, including a fixed plate and a lower mold. The lower mold is fixed through the middle of the fixed plate and has a mold hole in the middle. An ejection box is movably provided at the bottom of the mold hole. A stud is rotatably connected to the bottom wall of the ejection box. An ejection motor is installed on the lower side of the ejection box through a bracket. The stud is fixed to the output end of the ejection motor. A connecting sleeve is threaded onto the outer side of the stud located inside the ejection box. A connecting plate is fixed to the top of the connecting sleeve. Multiple ejection holes are provided on the top wall of the ejection box. Multiple vertical ejection rods arranged in a rectangular array are fixed on the top wall of the connecting plate. In this utility model, multiple evenly distributed ejection parts contact the molded part during the ejection process. The ejection structure has many contact points with the molded part, so that the molded part is subjected to uniform force during the ejection process, which can avoid damage to the molded part during the ejection process.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an ejection structure for injection molding of lithium battery plastic shells. Background Technology

[0002] Injection molds are tools used for molding plastics. They inject molten plastic into a cavity of a specific shape, which then cools and solidifies to form a plastic product with the desired shape and size. Injection molds are widely used in many industries such as electronics, automobiles, home appliances, and daily necessities, and are key process equipment for achieving large-scale production of plastic products. The casing of a lithium battery is usually made of metal or plastic materials to enclose the battery's electrochemical components and protect its internal structure and circuitry. The casing needs to have properties such as high temperature resistance, corrosion resistance, vibration resistance, and compression resistance to ensure the battery's lifespan and safety. During the injection molding process of lithium battery plastic casings, an ejector structure is used to eject the molded part from the injection mold for easy removal.

[0003] Existing ejection structures for injection molding typically lift the molded part of the lithium battery plastic casing upwards. However, the contact points between the ejection structure and the molded part are few, resulting in uneven stress on the molded part during ejection, which can easily lead to damage during the ejection process. Therefore, an ejection structure for injection molding of lithium battery plastic casings is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an ejection structure for injection molding of plastic casings for lithium batteries, which solves the problems mentioned in the background art.

[0005] This application provides an ejection structure for injection molding a lithium battery plastic casing, including a fixed plate and a lower mold. The lower mold is fixed through the middle of the fixed plate. A mold hole is opened in the middle of the lower mold. An ejection box is movably installed at the bottom of the mold hole. A stud is rotatably connected to the bottom wall of the ejection box. An ejection motor is installed on the lower side of the ejection box via a bracket. The stud is fixed to the output end of the ejection motor. A connecting sleeve is threaded onto the outer side of the stud located inside the ejection box. A connecting plate is fixed to the top of the connecting sleeve. Multiple ejection holes are opened on the top wall of the ejection box. Multiple vertical ejection rods arranged in a rectangular array are fixed on the top wall of the connecting plate. The top of the ejection rods is movably disposed inside the ejection holes. Columns are fixed on both sides of the top wall of the fixed plate. A top plate is fixed to the top of two columns. A hydraulic cylinder is installed in the middle of the top plate. A template is fixed to the output end of the hydraulic cylinder. An upper mold is fixed to the bottom wall of the template.

[0006] Optionally, both sides of the bottom wall of the fixed plate are fixed with support seats, and support plates are fixed on the opposite side walls of the two support seats. Both sides of the outer bottom wall of the ejector box are fixed with flat plates, and the two flat plates are respectively located on the top walls of the two support plates. Both sides of the lower mold are provided with lower through holes, and both sides of the template are provided with upper through holes. A lifting rod is movably installed inside the lower through hole. The top end of the lifting rod passes through the upper through hole and is fixed with a baffle. The lifting rod is fixed to the top wall of the flat plate.

[0007] By adopting the above technical solution, the flat plate, the ejector box, the lifting rod and the baffle are supported by the support plate.

[0008] Optionally, the diameters of the lower and upper through holes are adapted to the dimensions of the lifting rod.

[0009] By adopting the above technical solution, the flat plate, top box, lifting rod and baffle can be raised and lowered stably.

[0010] Optionally, the upper mold is located directly above the mold hole, and vertical guide sleeves are fixed on both sides of the template. The guide sleeves are movably sleeved on the outside of the column, and the inner circle of the guide sleeve is adapted to the size of the column.

[0011] By adopting the above technical solution, the template and the upper mold can be raised and lowered stably.

[0012] Optionally, an injection tube is fixed to the top of the lower mold, and the mold hole communicates with the injection tube.

[0013] By adopting the above technical solution, the injection molding material for the lithium battery plastic casing can be injected into the mold cavity through the injection tube.

[0014] Optionally, the dimensions of the outer wall of the ejector box are adapted to the dimensions of the mold hole.

[0015] By adopting the above technical solution, the injection plastic inside the injection mold hole can be prevented from flowing downwards.

[0016] Optionally, the top end of the ejector rod is flush with the top end of the ejector box, and the size of the outlet hole is adapted to the size of the ejector rod.

[0017] By adopting the above technical solution, it is possible to prevent the injection plastic inside the mold hole from entering the outlet hole.

[0018] Optionally, vertical sliding grooves are provided on the inner sidewalls of both sides of the ejector box along the height direction, and sliders are fixed on both sides of the connecting plate, with the sliders sliding and connected to the inside of the vertical sliding grooves.

[0019] By adopting the above technical solution, the connecting sleeve, connecting plate, and ejector rod can be raised and lowered stably.

[0020] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0021] This application proposes an ejection structure for injection molding of lithium battery plastic casings. After injection molding, the hydraulic cylinder contracts until the top wall of the mold plate contacts the bottom wall of the baffle. Then, the ejection motor operates, and multiple evenly distributed ejector rods contact the molded part. Subsequently, the hydraulic cylinder contracts, and the molded part is lifted upward by the multiple evenly distributed ejector rods, thus ejecting the molded part from the injection mold. During the ejection process, the multiple evenly distributed ejector rods contact the molded part, resulting in numerous contact points between the ejection structure and the molded part. This ensures that the molded part is subjected to uniform force during ejection, preventing damage to the molded part during the ejection process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an ejection structure for injection molding a lithium battery plastic casing according to the present invention;

[0023] Figure 2 This is a top view of the ejection structure for injection molding of a lithium battery plastic casing according to the present invention.

[0024] Figure 3 This is a cross-sectional view of an ejection structure for injection molding a lithium battery plastic casing according to the present invention.

[0025] Figure 4 This utility model relates to an ejection structure for injection molding of a lithium battery plastic casing. Figure 3 An enlarged schematic diagram of the structure at point A in the diagram.

[0026] In the diagram: 1. Fixed plate; 2. Lower mold; 3. Column; 4. Guide sleeve; 5. Top plate; 6. Hydraulic cylinder; 7. Template; 8. Upper mold; 9. Lifting rod; 10. Baffle; 11. Support; 12. Ejector box; 13. Stud; 14. Ejector motor; 15. Support plate; 16. Flat plate; 17. Mold hole; 18. Ejector rod; 19. Connecting plate; 20. Lower through hole; 21. Upper through hole; 22. Outlet hole; 23. Connecting sleeve. Detailed Implementation

[0027] Please see Figure 1-4This utility model provides a technical solution: an ejection structure for injection molding of a lithium battery plastic casing, including a fixed plate 1, a lower mold 2 fixed in the middle of the fixed plate 1, a mold hole 17 opened in the middle of the lower mold 2, an injection tube fixed in the top of the lower mold 2, the mold hole 17 communicating with the injection tube, allowing the injection molding material of the lithium battery plastic casing to be injected into the mold hole 17 through the injection tube, an ejection box 12 movably provided at the bottom of the mold hole 17, a vertical stud 13 rotatably connected to the middle of the bottom wall of the ejection box 12 via a bearing, an ejection motor 14 mounted on the lower side of the ejection box 12 via a bracket, the ejection motor 14 can be controlled to rotate forward or backward via a controller, and the bottom of the stud 13... The output end of the ejector motor 14 is fixed to the end of the ejector. The outer ring of the stud 13 inside the ejector box 12 is threaded with a connecting sleeve 23. The top of the connecting sleeve 23 is fixed with a horizontal connecting plate 19. Multiple outlet holes 22 arranged in a rectangular array are opened on the top wall of the ejector box 12. Multiple vertical ejector rods 18 arranged in a rectangular array are fixed on the top wall of the connecting plate 19. The top of the ejector rods 18 is movably located inside the outlet holes 22. Vertical columns 3 are fixed on both sides of the top wall of the fixed plate 1. A horizontal top plate 5 is fixed at the top of the two columns 3. A hydraulic cylinder 6 with the output end facing down is installed in the middle of the top plate 5. A horizontal template 7 is fixed at the output end of the hydraulic cylinder 6. An upper mold 8 is fixed in the middle of the bottom wall of the template 7.

[0028] In some technical solutions, such as Figure 1 and Figure 3 As shown, both sides of the bottom wall of the fixed plate 1 are fixed with support seats 11, and horizontal support plates 15 are fixed on the opposite side walls of the two support seats 11. Both sides of the outer bottom wall of the ejector box 12 are fixed with horizontal flat plates 16. The two flat plates 16 are located on the top walls of the two support plates 15 respectively. Both sides of the lower mold 2 are provided with lower through holes 20, and both sides of the template 7 are provided with upper through holes 21. A vertical lifting rod 9 is movably installed inside the lower through hole 20. The lifting rod 9 is movably installed inside the upper through hole 21. The bottom end of the lifting rod 9 is fixed to the top wall of the flat plate 16, and the top end of the lifting rod 9 extends to the upper side of the template 7 and is fixed with a baffle 10. The flat plate 16, ejector box 12, lifting rod 9 and baffle 10 are supported by the support plates 15. The diameters of the lower through holes 20 and upper through holes 21 are adapted to the size of the lifting rod 9, so that the flat plate 16, ejector box 12, lifting rod 9 and baffle 10 can be raised and lowered stably.

[0029] In some technical solutions, such as Figure 2 and Figure 3 As shown, the upper mold 8 is located directly above the mold hole 17, allowing the upper mold 8 to enter the interior of the mold hole 17. Vertical guide sleeves 4 are fixed on both sides of the template 7. The two guide sleeves 4 are respectively movably sleeved on the outside of the two columns 3. The inner circle size of the guide sleeve 4 is adapted to the size of the column 3, so that the template 7 and the upper mold 8 can be raised and lowered stably.

[0030] In some technical solutions, such as Figure 2 , Figure 3 and Figure 4 As shown, the dimensions of the outer wall of the ejector box 12 are adapted to the dimensions of the mold hole 17, which can prevent the injection plastic injected into the mold hole 17 from flowing downward. The top of the ejector rod 18 is flush with the outer top wall of the ejector box 12. The dimensions of the outlet hole 22 are adapted to the dimensions of the ejector rod 18, which can prevent the injection plastic injected into the mold hole 17 from entering the interior of the outlet hole 22.

[0031] In some technical solutions, such as Figure 3 and Figure 4 As shown, vertical sliding grooves are provided on both inner sidewalls of the ejector box 12 along the height direction. Slider blocks are fixed on both sides of the connecting plate 19. The sliders slide and connect to the inside of the vertical sliding grooves, so that the connecting sleeve 23, the connecting plate 19 and the ejector rod 18 can rise and fall stably.

[0032] In use, if injection molding of the lithium battery plastic casing is required, the extension of the hydraulic cylinder 6 can drive the template 7 and the upper mold 8 to descend until the bottom wall of the template 7 contacts the top of the lower mold 2, allowing the upper mold 8 to enter the mold hole 17. Then, the injection molding material of the lithium battery plastic casing is injected into the mold hole 17 through the injection tube, so that the injection molding material of the lithium battery plastic casing is formed inside the mold hole 17. The injection molding process is simple and labor-saving. After injection molding is completed, the molded part of the lithium battery plastic casing is located inside the mold hole 17. If it is necessary to eject the molded part from the injection mold, the retraction of the hydraulic cylinder 6 can drive the template 7 and the upper mold 8 to rise until the top wall of the template 7 contacts the bottom wall of the baffle 10. The forward rotation of the ejection motor 14 can drive the stud 13 to rotate clockwise. Through the threaded transmission between the stud 13 and the sleeve 23, the sleeve 23 is able to rotate clockwise. 3. The ejector plate 19 and ejector rod 18 are raised, and the molded part is lifted upward by the ejector rod 18. The ejector rod 18 acts as an ejector, and multiple evenly distributed ejector rods 18 contact the molded part. The ejection structure has many contact points with the molded part. Then, by the contraction of the hydraulic cylinder 6, the template 7, upper mold 8, baffle 10, lifting rod 9, plate 16, ejection box 12 and ejector rod 18 are raised. The molded part is lifted upward by multiple evenly distributed ejector rods 18 until the molded part is located on the upper side of the lower mold 2. The molded part can then be separated from the mold hole 17, and the ejection of the molded part from the injection mold is completed. During the ejection process, multiple evenly distributed ejector rods contact the molded part. The multiple contact points between the ejection structure and the molded part make the molded part bear force evenly during the ejection process, which can avoid damage to the molded part during the ejection process.

Claims

1. An ejection structure for injection molding a lithium battery plastic casing, comprising a fixed plate (1) and a lower mold (2), characterized in that, The lower mold (2) is fixed through the middle of the fixed plate (1). A mold hole (17) is opened in the middle of the lower mold (2). An ejector box (12) is movably provided at the bottom of the mold hole (17). A stud (13) is rotatably connected to the bottom wall of the ejector box (12). An ejector motor (14) is installed on the lower side of the ejector box (12) through a bracket. The stud (13) is fixed to the output end of the ejector motor (14). A connecting sleeve (23) is threaded onto the outer side of the stud (13) inside the ejector box (12). A connecting plate is fixed to the top of the connecting sleeve (23). 19) The top wall of the ejector box (12) is provided with multiple ejector holes (22). The top wall of the connecting plate (19) is fixed with multiple vertical ejector rods (18) arranged in a rectangular array. The top of the ejector rod (18) is movably located inside the ejector hole (22). The top walls of the fixed plate (1) are fixed with columns (3) on both sides. The top of the two columns (3) is fixed with a top plate (5). A hydraulic cylinder (6) is installed in the middle of the top plate (5). A template (7) is fixed at the output end of the hydraulic cylinder (6). An upper mold (8) is fixed on the bottom wall of the template (7).

2. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, Both sides of the bottom wall of the fixed plate (1) are fixed with support seats (11), and support plates (15) are fixed on the opposite side walls of the two support seats (11). Both sides of the outer bottom wall of the ejector box (12) are fixed with flat plates (16). The two flat plates (16) are located on the top walls of the two support plates (15). Both sides of the lower mold (2) are provided with lower through holes (20). Both sides of the template (7) are provided with upper through holes (21). A lifting rod (9) is movably provided inside the lower through hole (20). The top of the lifting rod (9) passes through the upper through hole (21) and is fixed with a baffle (10). The lifting rod (9) is fixed on the top wall of the flat plate (16).

3. The ejection structure for injection molding of a lithium battery plastic casing according to claim 2, characterized in that, The diameters of the lower through hole (20) and the upper through hole (21) are adapted to the size of the lifting rod (9).

4. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, The upper mold (8) is located directly above the mold hole (17). Vertical guide sleeves (4) are fixed on both sides of the template (7). The guide sleeves (4) are movably sleeved on the outside of the column (3). The inner circle of the guide sleeve (4) is adapted to the size of the column (3).

5. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, The top of the lower mold (2) is fixed with an injection tube, and the mold hole (17) is connected to the injection tube.

6. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, The dimensions of the outer wall of the ejector box (12) are adapted to the dimensions of the mold hole (17).

7. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, The top end of the ejector rod (18) is flush with the top end of the ejector box (12), and the size of the outlet hole (22) is adapted to the size of the ejector rod (18).

8. The ejection structure for injection molding of a lithium battery plastic casing according to claim 1, characterized in that, Vertical sliding grooves are provided on both inner side walls of the top box (12) along the height direction. Sliding blocks are fixed on both sides of the connecting plate (19), and the sliding blocks are connected to the inside of the vertical sliding grooves.

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