Battery bottom groove multi-cavity mold structure

Abstract

The application discloses a battery bottom groove multi-cavity die structure and relates to the technical field of injection moulds.The battery bottom groove multi-cavity die structure comprises a movable die and a fixed die;the fixed die comprises a base, a lower partition plate, a lower die plate, a lower cushion plate and a lower die seat; a die core is fixed to the lower partition plate; the die core and a die core insert arranged in the lower die plate, the lower cushion plate and the lower die seat form a forming cavity for forming a battery bottom groove; the lower die plate, the lower cushion plate and the lower die seat are connected into an integral component; a pull rod A and a pull rod B are arranged between the movable die and the integral component and are mutually hooked and matched; and a top rod through hole corresponding to a top rod of an injection molding machine is further arranged on the fixed die.The movable integral component comprising the lower die plate, the lower cushion plate and the lower die seat is arranged on the fixed die; when mold opening is performed, the injection molding machine drives the movable die to move by a distance, then controls the integral component to be separated from the non-movable part of the fixed die, and then the top rod of the injection molding machine is used to push the integral component to be separated from the non-movable part of the fixed die, so that mold opening is completed.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, and in particular relates to a multi-cavity mold structure for battery bottom groove. Background Technology

[0002] Existing battery casings are all formed by injection molding and cooling. After cooling, they need to be demolded. The injection mold for battery casings includes a moving mold and a fixed mold. The moving mold is fixed on the moving platen of the injection molding machine and moves with the moving platen when the mold is opened and closed.

[0003] For example, CN201610546833.7 discloses a battery casing injection mold, including a first base plate, a mold cavity plate connected to the first base plate, a second base plate, a mounting plate connected to the second base plate, a mold core disposed in the mounting plate, a needle valve type hot runner injection nozzle embedded in the mold core, and a limiting member for limiting the mold opening distance between the mold cavity plate and the mounting plate. The mold cavity plate is provided with a receiving cavity, and the receiving cavity, the mold core, and the mounting plate together form a molding cavity that matches the battery casing; when the mold opens, the second base plate, the first mounting plate, and the mounting plate are connected to the first base plate. The first mounting plate, the second mounting plate, and the third mounting plate are gradually moved away from the mold cavity plate as a whole. At the same time, the mold core is gradually pulled out from the battery housing. The battery housing separates from the third mounting plate along with the first base plate and the mold cavity plate. When the first limiting part abuts against the first limiting platform and the second limiting part abuts against the second limiting platform, the mold opening is completed. Then, the battery housing can be clamped out of the accommodating cavity by a robot arm. After the mold opening is completed, the battery housing remains in the cavity. With this mold opening method, it is inconvenient to remove the battery housing from the cavity in the later stages of inversion. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-cavity mold structure for battery bottom grooves. By setting a movable integral component including a lower template, a lower backing plate, and a lower mold base in the fixed mold, when the mold is opened, the injection molding machine drives the moving mold to move a distance and controls the integral component to detach from the immovable part of the fixed mold. Then, the ejector roller of the injection molding machine is used to push the integral component away from the immovable part of the fixed mold, thus solving the problems mentioned in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a multi-cavity mold structure for a battery bottom groove, comprising a moving mold and a fixed mold. The fixed mold includes a base, a lower partition plate, a lower template, a lower pad, and a lower mold base. A mold core is fixed on the lower partition plate, and the mold core and the mold insert disposed in the lower template, lower pad, and lower mold base constitute a molding cavity for forming the battery bottom groove. The lower template, lower pad, and lower mold base are connected to form an integral component. At least four sets of tie rod assemblies are provided between the moving mold and the integral component. The tie rod assembly includes tie rod A and tie rod B, which are respectively installed on the moving mold and the integral component and are mutually engaged. The fixed mold is also provided with an ejector pin through hole corresponding to the ejector pin of an injection molding machine. The ejector pin through hole passes through the base, lower partition plate, lower template, and lower pad in sequence, so that the end of the ejector pin of the injection molding machine abuts against the side of the lower mold base near the lower pad after it extends.

[0007] Furthermore, the tie rods A and B within the same tie rod assembly are spaced apart, and their ends are respectively provided with hook parts A and B that cooperate with each other.

[0008] Furthermore, hook A and hook B protrude from opposite sides of pull rod A and pull rod B, respectively.

[0009] Furthermore, the hook parts A and B are respectively provided with mutually cooperating grooves and protrusions on their opposite sides; when the mold is opened, the moving mold moves away from the fixed mold until the hook parts A and B hook together.

[0010] Furthermore, the moving mold includes an upper mold base, a hot runner mold plate, and a top mold plate; the tie rod A is fixed to the outer side wall of the upper mold base, the hot runner mold plate, or the top mold plate; the tie rod B is fixed to the outer side wall of the lower mold plate, the lower pad, or the lower mold base.

[0011] Furthermore, when opening the mold, first control the moving mold to move away from the fixed mold until hook A and hook B hook together, then continue moving until one mold opening is completed; then control the injection molding machine ejector to extend until its end abuts against the side of the lower mold base near the lower pad, and then extend a distance to complete the second mold opening.

[0012] Furthermore, a hot runner system is provided within the hot runner template; the hot runner system includes a manifold A and a manifold B that are connected together, with an injection nozzle connected to the manifold A; a hot nozzle for dispensing glue is connected to the lower surface of the manifold B; the number and position of the manifold B correspond to the molding cavity within the mold.

[0013] Furthermore, a heater A and a temperature sensor A are provided on the upper surface of the flow divider A; a heater B and a temperature sensor B are provided on both the upper and lower surfaces of the flow divider B.

[0014] The present invention has the following beneficial effects:

[0015] This invention sets up a movable integral component in the fixed mold, including a lower template, a lower backing plate, and a lower mold base. During mold opening, the injection molding machine moves the moving mold a certain distance and controls the integral component to detach from the immovable part of the fixed mold. Then, the injection molding machine ejector roller pushes the integral component away from the immovable part of the fixed mold, thus completing the mold opening. At this time, the product can be taken out by a robot, realizing automated part picking by a robot and automated production.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the multi-cavity mold structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the multi-cavity mold structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the multi-cavity mold structure of the present invention. Figure 3 . Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0023] Please see Figure 1-2As shown, the present invention is a multi-cavity mold structure for battery bottom groove, including a moving mold 10 and a fixed mold 20; the fixed mold 20 includes a base 1, a lower partition plate 2, a lower template 3, a lower pad plate 4 and a lower mold base 5, and the lower template 3, the lower pad plate 4 and the lower mold base 5 are connected to form an integral component; the moving mold 10 includes an upper mold base 6, a hot runner template 7 and a top template 8.

[0024] To facilitate mold making, such as Figure 2 The present invention provides at least four sets of tie rod assemblies between the moving mold 10 and the overall component. The tie rod assemblies include tie rods A61 and B41, which are respectively installed on the moving mold 10 and the overall component and are mutually engaged. When the mold is opened, the injection molding machine drives the moving mold 10 to move away from the fixed mold 20. At this time, due to the engagement of tie rods A61 and B41, the moving mold 10 moves a certain distance and then the engagement of tie rods A61 and B41 drives the overall component to detach from the lower partition plate 2 by a certain distance, thereby controlling the separation of the battery bottom groove 701 formed in the molding cavity from the molding cavity.

[0025] Of course, it is known that, such as Figure 3 To facilitate the removal of products using a robotic arm and achieve automated part removal and production, this invention includes a mold core 700 fixed on the lower partition plate 2. The mold core 700 and the mold insert 70 set in the lower template 3, lower pad 4 and lower mold base 5 constitute a molding cavity for forming the battery bottom groove 701. Furthermore, the fixed mold 20 is provided with an ejector pin through hole 11 corresponding to the ejector pin of the injection molding machine. The ejector pin through hole 11 passes through the base 1, lower partition plate 2, lower template 3 and lower pad 4 in sequence, so that the end of the ejector pin of the injection molding machine abuts against the side of the lower mold base 5 near the lower pad 4 after it extends.

[0026] In one possible implementation, tie rod A61 is fixed to the outer wall of the upper mold base 6; tie rod B41 is fixed to the outer wall of the lower pad 4; of course, tie rod A61 can also be fixed to the outer wall of the hot runner template 7 or the top template 8, and tie rod B41 can be fixed to the outer wall of the lower template 3 or the lower mold base 5.

[0027] Based on the above settings, in this invention, when the mold is opened, the moving mold 10 is first controlled to move away from the fixed mold 20 until the pull rod A61 and the pull rod B41 are hooked together and then continue to move a distance to complete the first mold opening; then the injection molding machine ejector is controlled to extend to the end and abut against the side of the lower mold base 5 near the lower pad 4 and then continue to extend a distance to complete the second mold opening; the battery bottom groove 701 after the second mold opening is completed is completely exposed, that is, it is fitted on the mold core 700, while the lower mold plate 3, the lower pad 4 and the lower mold base 5 are connected as an integral component and all move out from its outer periphery.

[0028] It is understood that in this invention, the tie rods A61 and B41 in the same tie rod assembly are spaced apart, and their ends are respectively provided with hook parts A62 and B42 that cooperate with each other. The hook parts A62 and B42 are provided to facilitate the movement of the moving mold 10 to drive the movement of the whole component.

[0029] It is understood that, in the specific embodiments provided by the present invention, hook parts A62 and B42 protrude from the opposite sides of pull rods A61 and B41, respectively, and the protrusion height of both is less than the gap width formed by pull rods A61 and B41. Specifically, to facilitate the engagement and driving of pull rods A61 and B41, the opposite sides of hook parts A62 and B42 in this embodiment are respectively provided with mutually engaging grooves and protrusions. When the mold is opened, the moving mold 10 moves away from the fixed mold 20 until hook parts A62 and B42 engage together, that is, at this time, any protrusion is inserted into its corresponding groove, thereby completing the engagement of hook parts A62 and B42.

[0030] Based on the above, in order to facilitate the smooth removal of the product by a robotic arm after mold opening, it is necessary to avoid the ejector pins of the injection molding machine from extending and affecting the product removal as much as possible after actual mold opening. Therefore, this invention is provided with eight molding cavities. The eight molding cavities are arranged in two rows and four columns, and the ejector pin through holes 11 are located in the middle of the mold. The number of ejector pin through holes 11 is six, that is, the number of molding cavities on both sides of the six ejector pin through holes 11 is four.

[0031] It is understandable that in some other possible implementations, such as Figure 3 To address the imbalance between mold cavities, this invention incorporates a hot runner system within the hot runner template 7. This system includes a manifold A71 and a manifold B72, with an injection nozzle 711 connected to the manifold A71. A hot nozzle 721 is connected to the lower surface of the manifold B72. The number and position of the manifolds B72 correspond to the molding cavities within the mold. A heater A712 and a temperature sensor A713 are located on the upper surface of the manifold A71. Heaters B722 and temperature sensors B723 are located on both the upper and lower surfaces of the manifold B72. In other words, this invention employs a double-layer manifold hot runner system, optimizing and improving the runner design and resolving the imbalance between mold cavities.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-cavity mold structure for a battery bottom groove, characterized in that: It includes a moving mold (10) and a fixed mold (20); The fixed mold (20) includes a base (1), a lower partition plate (2), a lower template (3), a lower pad plate (4), and a lower mold base (5); A mold core is fixed on the lower partition plate (2). The mold core and the mold core set in the lower template (3), lower pad plate (4) and lower mold base (5) constitute a molding cavity for forming the bottom groove of the battery. The lower template (3), lower pad (4) and lower mold base (5) are connected to form an integral component; At least four sets of tie rod assemblies are provided between the moving mold (10) and the overall component; The tie rod assembly includes tie rod A (61) and tie rod B (41) which are respectively installed on the moving mold (10) and the integral component and are hooked together; The fixed mold (20) is also provided with an ejector through hole (11) corresponding to the ejector of the injection molding machine. The ejector through hole (11) passes through the base (1), the lower partition plate (2), the lower template (3), and the lower pad plate (4) in sequence, so that the end of the ejector of the injection molding machine abuts against the side of the lower mold base (5) near the lower pad plate (4) after it extends out. The tie rods A (61) and B (41) in the same tie rod assembly are spaced apart, and hook parts A (62) and B (42) are respectively provided at their ends to cooperate with each other; The hook part A (62) and hook part B (42) protrude from the opposite sides of the pull rod A (61) and the pull rod B (41), respectively; When opening the mold, first control the moving mold (10) to move away from the fixed mold (20) until the hook part A (62) and hook part B (42) hook together and then continue to move until the first mold opening is completed; then control the injection molding machine ejector to extend until the end abuts against the side of the lower mold base (5) near the lower pad (4) and then continue to extend a distance to complete the second mold opening.

2. The multi-cavity mold structure for a battery bottom groove according to claim 1, characterized in that, The hook part A (62) and hook part B (42) are respectively provided with mutually cooperating grooves and protrusions on their opposite sides; When the mold is opened, the moving mold (10) moves away from the fixed mold (20) until the hook part A (62) and the hook part B (42) hook together.

3. The multi-cavity mold structure for a battery bottom groove according to claim 1, characterized in that, The moving mold (10) includes an upper mold base (6), a hot runner mold plate (7), and a top mold plate (8); The tie rod A (61) is fixed to the outer wall of the upper mold base (6), the hot runner template (7), or the top template (8); The tie rod B (41) is fixed to the outer wall of the lower template (3), lower pad (4), or lower mold base (5).

4. The multi-cavity mold structure for a battery bottom groove according to claim 3, characterized in that, A hot runner system is provided inside the hot runner template (7); The hot runner system includes a manifold A (71) and a manifold B (72) connected together, with a nozzle (711) connected to the manifold A (71); The lower surface of the flow divider B (72) is connected to a glue dispensing nozzle (721); The number and position of the flow divider plates B(72) correspond to the forming cavity inside the mold.

5. The multi-cavity mold structure for a battery bottom groove according to claim 4, characterized in that, A heater A (712) and a temperature sensor A (713) are provided on the upper surface of the flow divider A (71); The upper and lower surfaces of the flow divider B (72) are provided with heaters B (722) and temperature sensors B (723).

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