Demoulding mechanism for injection moulding of electric vehicle storage boxes

Abstract

The utility model relates to die technical field discloses electric vehicle storage box injection molding die demolding mechanism, including work table, the work table top end is provided with the mounting groove, the mounting groove inside is equipped with the lower mould, the lower mould inner wall is equipped with the mould core, the work table includes the jacking mechanism for the ejection plastic piece, work table inner wall one side fixed mounting has the first motor, the first motor output shaft fixed sleeve has the two -way screw rod, the two -way screw rod both sides all are equipped with the guide rod, the utility model discloses through the design of jacking mechanism, makes first jack and second jack drive through the same lifting plate, ensures plastic piece bottom end and inner wall force simultaneously, avoids the cracking when demolding because of uneven stress, compared with traditional single part ejection mode, has shortened the demolding time, improved the stability of demolding, has guaranteed the quality of plastic piece, and the first spring resets the auxiliary lifting plate after demolding, reduces mechanical impact, improves the stability in the use process of jacking mechanism.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a demolding mechanism for injection molding molds of electric vehicle storage boxes. Background Technology

[0002] With the booming development of the electric vehicle industry, the manufacturing process of electric vehicle storage boxes, as an important functional component, has attracted much attention. In the injection molding process of storage boxes, the demolding process is the key to affecting production efficiency and product quality. The demolding mechanism of the injection molding mold for electric vehicle storage boxes is a mold auxiliary device used in the injection molding production process of electric vehicle storage boxes. It is mainly used to solve the problem of separation of the storage box from the mold after injection molding. Its function is to ensure that the plastic part can be smoothly and completely removed from the mold, while ensuring the quality of the plastic part and improving production efficiency and stability.

[0003] Traditional demolding mechanisms for electric vehicle storage box injection molds often employ a single-part ejection method, resulting in prolonged demolding time. This can easily lead to uneven stress in the plastic parts, causing cracking and affecting product yield. Furthermore, the lack of pre-separation design during mold opening means that direct demolding can easily cause tearing or deformation of the plastic parts, increasing maintenance costs and downtime. Therefore, this paper proposes an improved demolding mechanism for electric vehicle storage box injection molds. Utility Model Content

[0004] Given that the existing methods mostly use single-part ejection, resulting in long demolding times, uneven stress in the plastic parts, and lack of pre-separation design during mold opening, direct demolding can easily cause tearing or deformation of the plastic parts, this utility model is proposed.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a demolding mechanism for injection molding mold of electric vehicle storage box, including a worktable, an installation groove is provided at the top of the worktable, a lower mold is provided inside the installation groove, a mold core is provided on the inner wall of the lower mold, and the worktable includes a lifting mechanism for ejecting the plastic part;

[0006] A first motor is fixedly installed on one side of the inner wall of the workbench. A bidirectional lead screw is fixedly sleeved on the output shaft of the first motor. Guide rods are provided on both sides of the bidirectional lead screw. Moving plates are threaded to both ends of the bidirectional lead screw. Both ends of the moving plates are slidably connected to the surface of the guide rods. A lifting plate is provided above the moving plate. The top of the moving plate is hinged to the bottom of the lifting plate through a movable plate.

[0007] A plurality of first ejector rods are fixedly connected to the top edge of the lifting plate. The plurality of first ejector rods are slidably connected to the bottom wall of the lower mold. A sealing block is fixedly connected to the top of the plurality of first ejector rods. The sealing block is fitted into the groove of the inner wall of the lower mold. A plurality of second ejector rods are fixedly connected to the center of the top of the lifting plate. The second ejector rods are slidably connected to the inside of the mold core. The top of the plurality of second ejector rods is fixedly connected to the same ejector plate. The ejector plate is fitted into the groove at the top of the mold core.

[0008] As a preferred embodiment, a first spring is sleeved on the surface of the first push rod at the four corners of the top of the lifting plate, and the two ends of the first spring are respectively connected to the top of the lifting plate and the bottom of the lower mold.

[0009] As a preferred embodiment, the top of the worktable further includes a striking mechanism for pre-separation of the plastic parts. A second motor is fixedly installed on one side of the top of the worktable. A turntable is fixedly sleeved on the output shaft of the second motor. A fixing block is provided on one side of the turntable. A sliding rod is slidably connected inside the fixing block. A protruding rod on one side of the turntable is connected to one end of the sliding rod through a linkage rod.

[0010] As a preferred embodiment, the other end of the slide rod is provided with a slide groove, and a striking head is slidably connected to the inner wall of the slide groove. One end of the striking head is movably connected to a second spring, and one end of the second spring is fixedly connected to the inner wall of the slide groove.

[0011] As a preferred embodiment, the following configuration is provided: each of the four corners of the top of the workbench is fixedly connected to a column, the top of the column is fixedly connected to a top plate, a cylinder is fixedly installed at the center of the top of the top plate, the telescopic shaft of the cylinder passes through the top of the top plate and is fixedly connected to a connecting plate, an upper mold is fixedly connected to the bottom of the connecting plate, and an injection tube is fixedly sleeved at the center of the top of the upper mold.

[0012] As a preferred embodiment, a rectangular frame is fixedly fitted onto the surface of the lower mold, the rectangular frame is fitted into the inner wall of the mounting groove, and bolts are provided at the four corners of the top of the rectangular frame, the bottom ends of the bolts passing through the inside of the rectangular frame and threadedly connected to the inner wall of the mounting groove.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. This utility model, through the design of the lifting mechanism, ensures that the first and second ejector rods are driven by the same lifting plate, thereby ensuring that the bottom end and inner wall of the plastic part are subjected to force simultaneously. This avoids cracking caused by uneven stress during demolding. Compared with the traditional single-part ejection method, it shortens the demolding time, improves the stability of demolding, and ensures the quality of the plastic part. At the same time, the first spring assists the lifting plate in resetting after demolding, reducing mechanical impact and improving the stability of the lifting mechanism during use.

[0015] 2. Through the design of the striking mechanism, this utility model can break the adhesion and residual weld lines between the plastic part and the lower mold by striking before the mold is opened, so as to avoid the plastic part tearing or deformation due to excessive adhesion force, thereby reducing maintenance costs and downtime. The second spring gives the striking head a soft contact characteristic, so that the second spring is compressed to absorb the impact force during striking, avoiding damage to the surface of the lower mold by hard striking. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present invention;

[0017] Figure 2 This is a front cross-sectional view of the present invention.

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 This is a magnified schematic diagram of a portion of the lifting mechanism in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Workbench; 11. Mounting slot; 12. Column; 13. Top plate; 2. Lower mold; 21. Mold core; 22. Rectangular frame; 23. Bolt; 3. Lifting mechanism; 31. First motor; 32. Two-way lead screw; 33. Moving plate; 34. Guide rod; 35. Movable plate; 36. Lifting plate; 37. First ejector rod; 38. Sealing block; 39. Second ejector rod; 310. Ejector plate; 311. First spring; 4. Striking mechanism; 41. Second motor; 42. Turntable; 43. Linkage rod; 44. Slide rod; 45. Fixing block; 46. Slide groove; 47. Striking head; 48. Second spring; 5. Cylinder; 51. Connecting plate; 6. Upper mold; 61. Injection tube. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Reference Figures 1-4 The first embodiment of this utility model provides a demolding mechanism for an injection molding mold of an electric vehicle storage box, including a workbench 1, an installation groove 11 at the top of the workbench 1, a lower mold 2 inside the installation groove 11, a mold core 21 on the inner wall of the lower mold 2, and a lifting mechanism 3 for ejecting the plastic part from the workbench 1.

[0024] A first motor 31 is fixedly installed on one side of the inner wall of the workbench 1. A bidirectional lead screw 32 is fixedly sleeved on the output shaft of the first motor 31. Guide rods 34 are provided on both sides of the bidirectional lead screw 32. Moving plates 33 are threaded to both ends of the bidirectional lead screw 32. Both ends of the moving plates 33 are slidably connected to the surface of the guide rods 34. A lifting plate 36 is provided above the moving plate 33. The top of the moving plate 33 is hinged to the bottom of the lifting plate 36 through a movable plate 35.

[0025] A number of first ejector rods 37 are fixedly connected to the top edge of the lifting plate 36. The number of first ejector rods 37 are slidably connected to the bottom wall of the lower mold 2. A sealing block 38 is fixedly connected to the top of the number of first ejector rods 37. The sealing block 38 is fitted into the groove of the inner wall of the lower mold 2. A number of second ejector rods 39 are fixedly connected to the center of the top of the lifting plate 36. The second ejector rods 39 are slidably connected to the inside of the mold core 21. The top of the number of second ejector rods 39 is fixedly connected to the same ejector plate 310. The ejector plate 310 is fitted into the groove at the top of the mold core 21.

[0026] A first spring 311 is fitted on the surface of the first push rod 37 at the four corners of the top of the lifting plate 36. The two ends of the first spring 311 are connected to the top of the lifting plate 36 and the bottom of the lower mold 2, respectively.

[0027] During use, the first motor 31 is started, and its output shaft drives the bidirectional lead screw 32 to rotate. When the bidirectional lead screw 32 rotates, it drives the moving plates 33 at both ends to move towards the middle along the guide rod 34. The guide rod 34 ensures that the moving plates 33 move smoothly and avoids deviation.

[0028] As the movable plates 33 at both ends move towards the middle, the movable plate 35 at the top of the plate lifts the lifting plate 36 upward through the hinge point, achieving a vertical rise. The lifting plate 36 drives several first ejector rods 37 to move upward. The sealing block 38 at the top of the first ejector rod 37 presses against the bottom of the plastic part, causing the plastic part to move upward from the lower mold 2. At the same time, the second ejector rod 39 at the center of the lifting plate 36 rises synchronously, pushing the ejector plate 310 to press against the inner wall of the plastic part, preventing the internal structure from deforming or retaining the mold core 21 due to insufficient demolding force, thereby completing the demolding of the main body and ensuring the stability of demolding. The first spring 311 assists the lifting plate 36 to reset after demolding, reducing mechanical impact.

[0029] This device, through the design of the lifting mechanism 3, ensures that the first ejector rod 37 and the second ejector rod 39 are driven by the same lifting plate 36, thereby ensuring that the bottom end and inner wall of the plastic part are subjected to force simultaneously. This avoids cracking due to uneven stress during demolding. Compared with the traditional single-part ejection method, it shortens the demolding time, improves the stability of demolding, and ensures the quality of the plastic part. At the same time, the first spring 311 assists the lifting plate 36 in resetting after demolding, reducing mechanical impact and improving the stability of the lifting mechanism 3 during use.

[0030] Reference Figures 1-4This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the top of the workbench 1 also includes a striking mechanism 4 for pre-separation of plastic parts. A second motor 41 is fixedly installed on one side of the top of the workbench 1. A turntable 42 is fixedly sleeved on the output shaft of the second motor 41. A fixing block 45 is provided on one side of the turntable 42. A sliding rod 44 is slidably connected inside the fixing block 45. A protruding rod on one side of the turntable 42 is connected to one end of the sliding rod 44 through a linkage rod 43.

[0031] The other end of the slide rod 44 is provided with a slide groove 46, and a striking head 47 is slidably connected to the inner wall of the slide groove 46. One end of the striking head 47 is movably connected to a second spring 48, and one end of the second spring 48 is fixedly connected to the inner wall of the slide groove 46.

[0032] During use, before the mold is opened, the second motor 41 is started, and its output shaft drives the turntable 42 to rotate. The protrusion on one side of the turntable 42 drives the slide bar 44 to move linearly back and forth in the fixed block 45 through the linkage rod 43.

[0033] When the slide bar 44 moves to the left, the striking head 47 moves to the left synchronously with the slide groove 46. When the striking head 47 contacts the edge of the lower mold 2, the striking head 47 generates an instantaneous striking force on the edge of the lower mold 2. The striking head 47 slides into the slide groove 46 and compresses the second spring 48 to buffer the force of the striking head 47, thereby creating a small gap between the plastic part and the mold wall to achieve the purpose of pre-separation.

[0034] This device, through the design of the striking mechanism 4, can break the adhesion and residual weld lines between the plastic part and the lower mold 2 by striking before the mold is opened, so as to avoid the plastic part being torn or deformed due to excessive adhesion. The second spring 48 gives the striking head 47 a soft contact characteristic, so that the second spring 48 is compressed to absorb the impact force when striking, and avoids hard striking to damage the surface of the lower mold 2.

[0035] Reference Figures 1-4 This is the third embodiment of the present utility model. The difference between this embodiment and the second embodiment is that: each of the four corners of the top of the workbench 1 is fixedly connected to a column 12, the top of the column 12 is fixedly connected to a top plate 13, a cylinder 5 is fixedly installed at the center of the top of the top of the top plate 13, the telescopic shaft of the cylinder 5 passes through the top of the top of the top plate 13 and is fixedly connected to a connecting plate 51, the bottom of the connecting plate 51 is fixedly connected to an upper mold 6, and an injection tube 61 is fixedly sleeved at the center of the top of the upper mold 6;

[0036] A rectangular frame 22 is fixedly fitted onto the surface of the lower mold 2. The rectangular frame 22 is fitted into the inner wall of the mounting groove 11. Bolts 23 are provided at the four corners of the top of the rectangular frame 22. The bottom end of the bolt 23 passes through the inside of the rectangular frame 22 and is threaded to the inner wall of the mounting groove 11.

[0037] During use, the column 12 supports the top plate 13 to form the mounting frame of the upper mold 6; the cylinder 5 is started, and the telescopic shaft drives the connecting plate 51 and the upper mold 6 to descend vertically until the bottom surface of the upper mold 6 is tightly attached to the top surface of the lower mold 2 to form a closed mold cavity. Molten plastic is injected into the mold cavity through the injection tube 61 to form the storage box plastic part.

[0038] When installing the lower mold 2, the rectangular frame 22 on its peripheral surface is fitted into the mounting groove 11, and then the four corner bolts 23 are tightened diagonally to fix the lower mold 2.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ejection mechanism for an injection molding mold for an electric vehicle storage box, comprising a worktable (1), characterized in that: The workbench (1) has an installation groove (11) at the top, and a lower mold (2) is provided inside the installation groove (11). The inner wall of the lower mold (2) is provided with a mold core (21). The workbench (1) includes a lifting mechanism (3) for ejecting plastic parts. A first motor (31) is fixedly installed on one side of the inner wall of the workbench (1). A bidirectional lead screw (32) is fixedly sleeved on the output shaft of the first motor (31). Guide rods (34) are provided on both sides of the bidirectional lead screw (32). A moving plate (33) is threaded to both ends of the bidirectional lead screw (32). Both ends of the moving plate (33) are slidably connected to the surface of the guide rods (34). A lifting plate (36) is provided above the moving plate (33). The top of the moving plate (33) is hinged to the bottom of the lifting plate (36) through a movable plate (35). A plurality of first push rods (37) are fixedly connected to the top edge of the lifting plate (36). The plurality of first push rods (37) are slidably connected to the bottom wall of the lower mold (2). A sealing block (38) is fixedly connected to the top of the plurality of first push rods (37). The sealing block (38) is fitted into the groove of the inner wall of the lower mold (2). A plurality of second push rods (39) are fixedly connected to the center of the top of the lifting plate (36). The second push rods (39) are slidably connected to the inside of the mold core (21). The top of the plurality of second push rods (39) is fixedly connected to the same ejector plate (310). The ejector plate (310) is fitted into the groove at the top of the mold core (21).

2. The e-trunk injection molding mold demolding mechanism according to claim 1, characterized in that: The first spring (311) is sleeved on the surface of the first top rod (37) at the four corners of the top of the lifting plate (36). The two ends of the first spring (311) are respectively connected to the top of the lifting plate (36) and the bottom of the lower mold (2).

3. The e-trunk injection molding mold demolding mechanism according to claim 1, characterized in that: The top of the workbench (1) also includes a striking mechanism (4) for pre-separation of plastic parts. A second motor (41) is fixedly installed on one side of the top of the workbench (1). A turntable (42) is fixedly sleeved on the output shaft of the second motor (41). A fixing block (45) is provided on one side of the turntable (42). A slide rod (44) is slidably connected inside the fixing block (45). A protruding rod on one side of the turntable (42) is connected to one end of the slide rod (44) through a linkage rod (43).

4. The e-trunk injection molding mold demolding mechanism according to claim 3, characterized in that: The other end of the slide rod (44) is provided with a slide groove (46), and a striking head (47) is slidably connected to the inner wall of the slide groove (46). One end of the striking head (47) is movably connected to a second spring (48), and one end of the second spring (48) is fixedly connected to the inner wall of the slide groove (46).

5. The e-trunk injection molding mold demolding mechanism according to claim 1, characterized in that: The workbench (1) is fixedly connected to four corners of the top of each column (1). The top of the column (12) is fixedly connected to a top plate (13). A cylinder (5) is fixedly installed at the center of the top of the top of the top plate (13). The telescopic shaft of the cylinder (5) passes through the top of the top of the top plate (13) and is fixedly connected to a connecting plate (51). The bottom of the connecting plate (51) is fixedly connected to an upper mold (6). An injection tube (61) is fixedly sleeved at the center of the top of the upper mold (6).

6. The e-trunk injection molding mold demolding mechanism according to claim 1, characterized in that: A rectangular frame (22) is fixedly fitted onto the surface of the lower mold (2). The rectangular frame (22) is fitted into the inner wall of the mounting groove (11). Bolts (23) are provided at the four corners of the top of the rectangular frame (22). The bottom end of the bolts (23) passes through the inside of the rectangular frame (22) and is threaded to the inner wall of the mounting groove (11).

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