Injection molding equipment for electric vehicle plastic part production

Abstract

The invention relates to the technical field of electric vehicle manufacturing, and provides injection molding equipment for electric vehicle plastic part production, which comprises a mounting seat, a lower mold is mounted on the mounting seat, and a pair of first mold cores capable of vertically ascending and descending along a mold cavity of the lower mold is symmetrically arranged in the lower mold; a second mold core capable of vertically ascending and descending along the mold cavity of the lower mold is arranged between the pair of first mold cores, a first push rod penetrating through the lower mold is arranged at the bottom of each first mold core, and a second push rod penetrating through the lower mold is arranged at the bottom of the second mold core. The mold overcomes the defects in the prior art and is reasonable in design and compact in structure, when a plastic part is demolded, the first mold core and the second mold core move and jack up the plastic part to be separated from the lower mold cavity, then the first mold core and the second mold core move relatively, the plastic part is separated from the first mold core, graded demolding of a main structure and complex details is achieved, and the demolding efficiency is improved. Deformation or strain of the plastic part is avoided, staged demolding can be conducted on the complex plastic part, and demolding convenience and safety are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle manufacturing, and particularly relates to an injection molding device for the production of plastic parts of electric vehicles. Background Art

[0002] In recent years, with the rapid development of the electric vehicle industry, the demand for lightweight, high-precision and complex-structured plastic parts has increased sharply. As the core process of plastic part manufacturing, the performance of injection molding equipment directly affects product quality and production efficiency.

[0003] However, plastic parts of electric vehicles often have multi-curved surfaces, thin walls or concave structures. Traditional equipment uses an integral ejection mechanism, which is prone to product deformation, surface scratches or even mold clamping damage due to uneven force during demolding. For this reason, we propose an injection molding device for the production of plastic parts of electric vehicles. Summary of the Invention

[0004] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides an injection molding device for the production of plastic parts of electric vehicles, which overcomes the deficiencies of the prior art, is reasonably designed and has a compact structure, and solves the problem that it is inconvenient to demold the existing complex plastic parts after injection molding.

[0005] (II) Technical Solutions To achieve the above purposes, the present invention is realized through the following technical solutions: An injection molding device for the production of plastic parts of electric vehicles includes a mounting base, a lower mold is mounted on the mounting base, a pair of first cores that can vertically lift along the cavity of the lower mold are symmetrically arranged in the lower mold, a second core that can vertically lift along the cavity of the lower mold is arranged between the pair of first cores, a first push rod penetrating the lower mold is arranged at the bottom of each first core, and a second push rod penetrating the lower mold is arranged at the bottom of the second core.

[0006] Preferably, connecting rods are symmetrically arranged at the bottom of the lower mold, a wedge-shaped push block is rotatably connected to the side of the connecting rod away from the lower mold, the inclined surfaces at the tops of the two wedge-shaped push blocks jointly abut against a lifting plate, and the top of the lifting plate is fixedly connected to the bottom of the first push rod, so that the height of the second push rod moving relatively upward is higher than that of the first push rod after the lower mold moves downward, realizing hierarchical demolding.

[0007] Preferably, a mounting plate is mounted on the mounting base, a horizontal slide rail for the horizontal movement of the wedge-shaped push block is arranged on the mounting plate, a vertical slide rail for the vertical movement of the lifting plate is arranged on the mounting plate, and a plurality of springs connected to the bottom of the lower mold are arranged on the mounting base to form a support for the lower mold.

[0008] Preferably, a plurality of lower molds are circumferentially installed on the mounting base. A rotatable rotating column is provided at the center of the mounting base. A lifting column that can rotate with it is provided at the center of the rotating column. The lifting column is vertically arranged and can be lifted and lowered within the rotating column, and the two are coaxially arranged. A connecting arm is provided at the top of the lifting column. An upper mold corresponding to the lower mold is provided on the side of the connecting arm away from the lifting column.

[0009] Preferably, a support plate is provided on the side wall at the bottom of the rotating column. The support plate is arranged directly below the connecting arm, and the top of the support plate is flush with the bottom of the lower mold to form a support for the bottom of the lower mold in the closed mold state.

[0010] Preferably, a plurality of arc-shaped grooves and vertical grooves are circumferentially formed on the outer wall of the rotating column. The upper side and the lower side between adjacent arc-shaped grooves are commonly connected by the same vertical groove. The vertical groove penetrates through the upper and lower ends of the rotating column. A lifting rod is provided on the side wall of the lifting column. A push column that cooperates with the arc-shaped groove and the vertical groove is provided on one side of the lifting rod. A cylinder is provided at the bottom of the lifting column. A stop block extending into the vertical groove is provided at the bottom of the arc-shaped groove. The top of the stop block abuts against the inner side of the arc-shaped groove, and an elastic block in a V shape is provided at the bottom to form a support for the stop block.

[0011] Preferably, a pressing frame is provided at the top of the lifting column. The included angle formed by the pressing frame and the extending direction of the connecting arm is an integer multiple of the included angle between the adjacent lower mold and the axis of the lifting column. A plurality of pressing rods that cooperate with the top wall of the lower mold are provided below the pressing frame.

[0012] Preferably, protrusions are provided on the surface of the lifting column in the vertical direction, and grooves that cooperate with the protrusions are provided in the rotating column so that the rotating column can drive the lifting column to rotate.

[0013] Preferably, the bottom of the rotating column is rotatably connected to a base, and a plurality of support columns connected to the mounting base are provided at the bottom of the base.

[0014] Preferably, a substrate is provided at the bottom of the cylinder, and the substrate is connected to the mounting base through a plurality of connecting columns.

[0015] (III) Beneficial Effects The embodiment of the present invention provides an injection molding device for producing plastic parts of electric vehicles. It has the following beneficial effects: 1. When the plastic part is demolded, the first mold core and the second mold core move and lift the plastic part to separate it from the lower mold cavity. Then, the first mold core and the second mold core move relative to each other, so that the plastic part is separated from the first mold core, realizing the hierarchical demolding of the main structure and complex details, avoiding the deformation or scratching of the plastic part, and enabling the staged demolding of complex plastic parts, greatly improving the convenience and safety of demolding.

[0016] 2. When the mold is opened, the lifting column rises to separate the upper mold from the lower mold. During this process, the rotating column rotates to switch the upper mold to the next working station, eliminating the need to wait for the lower mold to be removed before injecting the plastic part. The design of multiple lower molds allows the injection, cooling, and demolding processes to run in parallel, significantly improving production efficiency.

[0017] 3. When the mold is closed, the pressure frame moves downward with the lifting column and squeezes the lower molds at other working stations downward through the pressure rod, causing the plastic parts in the lower molds to be demolded. The automatic demolding during mold closing and the rotation of the upper mold working station during mold opening reduce manual intervention and facilitate the efficient automated production of plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front perspective schematic diagram of the overall structure of the present invention; Figure 2 is the bottom perspective schematic diagram of the overall structure of the present invention; Figure 3 is the top perspective schematic diagram of the lower mold structure of the present invention; Figure 4 is the bottom perspective schematic diagram of the lower mold structure of the present invention; Figure 5 is the front perspective schematic diagram of the lower mold structure of the present invention; Figure 6 is the three-dimensional schematic diagram of the lifting plate structure of the present invention; Figure 7 is the three-dimensional schematic diagram of the lifting rod structure of the present invention; Figure 8 is the three-dimensional schematic diagram of the support plate structure of the present invention; Figure 9 is the three-dimensional schematic diagram of the rotating column structure of the present invention; Figure 10 is the three-dimensional schematic diagram of the stop block structure of the present invention; Figure 11 of the present invention Figure 8 is the enlarged schematic diagram of structure A.

[0019] In the figure: 1. Mounting seat; 2. Lower mold; 21. First mold core; 22. Second mold core; 3. First push rod; 4. Second push rod; 5. Link; 6. Wedge-shaped push block; 7. Lifting plate; 8. Spring; 9. Mounting plate; 91. Horizontal slide rail; 92. Vertical slide rail; 10. Rotating column; 101. Support plate; 102. Arc-shaped groove; 103. Vertical groove; 104. Stop block; 105. Elastic block; 106. Base; 107. Support column; 11. Lifting column; 111. Lifting rod; 112. Push column; 113. Cylinder; 12. Connecting arm; 13. Upper mold; 14. Pressure frame; 15. Pressure rod. DETAILED DESCRIPTION OF THE INVENTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0021] Referring to the attached Figures 1-11 , an injection molding device for producing plastic parts of an electric vehicle, including a mounting base 1. An arc-shaped mounting hole is circumferentially provided on the mounting base 1 to facilitate the fixation of the entire device using a prefabricated bolt.

[0022] A lower mold 2 is installed on the mounting base 1. A pair of first mold cores 21 that can vertically lift along the mold cavity of the lower mold 2 are symmetrically arranged inside the lower mold 2. A second mold core 22 that can vertically lift along the mold cavity of the lower mold 2 is arranged between the pair of first mold cores 21. Through holes for the first mold cores 21 and the second mold core 22 to penetrate are provided at the bottom of the lower mold 2. A first push rod 3 penetrating the lower mold 2 is provided at the bottom of each first mold core 21, and a second push rod 4 penetrating the lower mold 2 is provided at the bottom of the second mold core 22. By simultaneously controlling the movement of the first push rod 3 and the second push rod 4 relative to the lower mold 2, the first mold cores 21 and the second mold core 22 are made to push the injection-molded plastic part out of the mold cavity of the lower mold 2. Subsequently, by controlling the relative separation of the first mold cores 21 and the second mold core 22, the demolding of the plastic part from the two mold cores is completed. By setting the split mold cores, staged demolding can be carried out for complex plastic parts, greatly improving the convenience and safety of demolding.

[0023] On both sides of the bottom of the lower mold 2, two connecting rods 5 are symmetrically arranged. On the side away from the lower mold 2 of the two connecting rods 5 on the same side, the same wedge-shaped push block 6 is rotatably connected. The inclined surfaces at the tops of the two wedge-shaped push blocks 6 on both sides jointly abut against a lifting plate 7. The top of the lifting plate 7 is fixedly connected to the bottom of the first push rod 3, so that the height of the relative upward movement of the second push rod 4 is higher than that of the first push rod 3 after the lower mold 2 moves downward, realizing staged demolding. During demolding, the lower mold 2 is controlled to move downward. At this time, the first push rod 3 and the second push rod 4 move upward relative to the lower mold 2, so that the first mold cores 21 and the second mold core 22 first simultaneously push the injection-molded part in the lower mold 2 upward and out of the mold cavity. Then, under the action of the connecting rods 5, the wedge-shaped push block 6 will push the bottom of the lifting plate 7 to move upward. At this time, the height of the relative upward movement of the second push rod 4 is higher than that of the first push rod 3, causing the formed injection-molded part to be relatively separated from the first mold cores 21. At this time, the formed plastic part on the second mold core 22 can be easily removed, greatly improving the convenience and safety of demolding complex plastic parts.

[0024] An installation plate 9 is installed on the installation base 1. A transverse slide rail 91 for the lateral movement of the wedge-shaped push block 6 is provided on the installation plate 9, ensuring that when the wedge-shaped push block 6 is subjected to the thrust of the connecting rod 5, it can move along the horizontal direction and push the lifting plate 7 upward. A vertical slide rail 92 for the vertical movement of the lifting plate 7 is provided on the installation plate 9, ensuring that the lifting plate 7 moves in the vertical direction and preventing the second push rod 4 from being subjected to an inclined thrust. A number of springs 8 connected to the bottom of the lower mold 2 are provided on the installation base 1 to form a support for the lower mold 2, ensuring that the lower mold 2 can reset when not subjected to force.

[0025] A number of lower molds 2 are circumferentially installed on the installation base 1. A rotatable rotating column 10 is provided at the center of the installation base 1. A lifting column 11 that can rotate with it is provided at the center of the rotating column 10. The lifting column 11 is vertically arranged and can be lifted and lowered within the rotating column 10, and the two are coaxially arranged. A connecting arm 12 is provided at the top of the lifting column 11. An upper mold 13 corresponding to the lower mold 2 is provided on the side of the connecting arm 12 away from the lifting column 11. The upper mold 13 moves downward to cooperate with the lower mold 2 to complete the injection molding of plastic parts. After the injection molding is completed, after waiting for the plastic parts in the lower mold 2 to be molded, the upper mold 13 can be controlled to move upward and separate from the lower mold 2, and then the rotating column 10 drives the lifting column 11 to rotate to control the upper mold 13 to move to the next lower mold 2 for mold closing and injection molding, without waiting to take out the lower mold 2 before injecting plastic parts. The design of multiple lower molds 2 allows the injection molding, cooling, and demolding processes to run in parallel, significantly improving production efficiency.

[0026] A support plate 101 is provided on the side wall at the bottom of the rotating column 10. The support plate 101 is arranged directly below the connecting arm 12, and the top of the support plate 101 is flush with the bottom of the lower mold 2 to form a support for the bottom of the lower mold 2 in the mold closing state. When the upper mold 13 rotates above the corresponding lower mold 2, the support plate 101 will correspondingly rotate below the lower mold 2 at that position to form a support for the bottom of the lower mold 2, preventing the lower mold 2 from moving downward under pressure during mold closing and injection molding, which affects the injection molding seal.

[0027] The outer wall of the rotating column 10 is circumferentially provided with a plurality of arc grooves 102 and vertical grooves 103. The upper side and the lower side between adjacent arc grooves 102 are commonly connected by the same vertical groove 103. The vertical groove 103 penetrates through the upper and lower ends of the rotating column 10. A lifting rod 111 is provided on the side wall of the lifting column 11. A push column 112 that cooperates with the arc groove 102 and the vertical groove 103 is provided on one side of the lifting rod 111. A cylinder 113 is provided at the bottom of the lifting column 11. The lifting column 11 is rotatably connected to the top output end of the cylinder 113. A stopper 104 extending into the vertical groove 103 is provided at the bottom of the arc groove 102. The top of the stopper 104 abuts against the inner side of the arc groove 102, and an elastic block 105 in a V shape is provided at the bottom to form a support for the stopper 104. A pit for accommodating the elastic block 105 is provided in the arc groove 102. The stopper 104 is rotatably connected in the pit, and the elastic block 105 is completely arranged in the pit to prevent it from affecting the movement of the push column 112 in the arc groove 102. When the cylinder 113 drives the lifting column 11 to move downward, at this time, the upper mold 13 moves downward for mold closing. When the cylinder 113 drives the lifting column 11 to move upward, at this time, the upper mold 13 will first separate from the lower mold 2, and then the lifting rod 111 will push the push column 112 to enter from the bottom of the vertical groove 103. Then, blocked by the stopper 104, the push column 112 will enter the arc groove 102, and the rotating column 10 will drive the lifting rod 111 to rotate. At this time, the upper mold 13 will rotate above the next lower mold 2, facilitating circumferential injection molding.

[0028] A pressing frame 14 is provided at the top of the lifting column 11. The included angle formed by the pressing frame 14 and the extending direction of the connecting arm 12 is an integer multiple of the included angle between the adjacent lower mold 2 and the axis of the lifting column 11. A plurality of pressing rods 15 that cooperate with the top wall of the lower mold 2 are provided below the pressing frame 14. When the lifting column 11 moves downward for mold closing and injection molding, at this time, the pressing frame 14 will also move downward, further causing the pressing rods 15 to press downward on the other lower mold 2. At this time, the plastic part in the downwardly pressed lower mold 2 can be automatically demolded.

[0029] Protrusions are provided on the surface of the lifting column 11 in the vertical direction, and grooves that cooperate with the protrusions are provided in the rotating column 10, so that the rotating column 10 can drive the lifting column 11 to rotate. Facilitating the rotation of the rotating column 10 to drive the lifting column 11, while the lifting column 11 can move up and down within the rotating column 10 to ensure the continuity of injection molding.

[0030] The bottom of the rotating column 10 is rotatably connected to a base 106. A plurality of support columns 107 connected to the mounting seat 1 are provided at the bottom of the base 106 to ensure that the rotating column 10 can rotate stably.

[0031] A substrate is provided at the bottom of the cylinder 113. The substrate is connected to the mounting seat 1 through a plurality of connecting columns. The whole device is of an integral structure, which is convenient for installation and transportation.

[0032] Working principle: The cylinder 113 operates, causing the lifting column 11 to move downward, further causing the upper mold 13 to move downward and cooperate with the lower mold 2 to complete mold closing. After injection molding, the cylinder 113 is controlled to operate again. At this time, the lifting column 11 moves upward, causing the upper mold 13 and the lower mold 2 to separate. Then, the lifting column 11 continues to move upward, causing the push column 112 to move along the arc-shaped groove 102 and causing the rotating column 10 to drive the lifting column 11 to rotate, further causing the upper mold 13 to rotate above another lower mold 2. Then, the cylinder 113 is controlled to reset again. At this time, the push column 112 will move downward along the vertical groove 103, and the rotating column 10 will not rotate. At this time, the upper mold 13 moves downward to complete mold closing with the lower mold 2. During the repeated mold closing process, the lifting column 11 will drive the pressing frame 14 to move downward, further causing the pressing rod 15 to squeeze the lower mold 2 at another position downward, causing the lower mold 2 to move downward to complete automatic demolding.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An injection molding device for producing electric vehicle plastic parts, comprising a mounting seat (1), characterized in that: A lower mold (2) is mounted on the mounting seat (1), a pair of first mold cores (21) are symmetrically arranged in the lower mold (2) and can be vertically lifted along the mold cavity of the lower mold (2), a second mold core (22) is arranged between the pair of first mold cores (21) and can be vertically lifted along the mold cavity of the lower mold (2), a first push rod (3) penetrating the lower mold (2) is arranged at the bottom of each first mold core (21), and a second push rod (4) penetrating the lower mold (2) is arranged at the bottom of each second mold core (22).

2. The injection molding equipment for producing electric vehicle plastic parts according to claim 1, characterized in that: The bottom of the lower mold (2) is symmetrically provided with connecting rods (5), and the side of the connecting rod (5) away from the lower mold (2) is rotatably connected to a wedge-shaped push block (6), and the inclined surfaces of the tops of the wedge-shaped push blocks (6) on both sides are commonly abutted against a lifting plate (7), and the top of the lifting plate (7) is fixedly connected to the bottom of the first push rod (3), so that after the lower mold (2) moves downward, the height of the relative upward movement of the second push rod (4) is higher than that of the first push rod (3), thereby realizing graded demoulding.

3. The injection molding equipment for producing electric vehicle plastic parts as claimed in claim 2, characterized in that: A mounting plate (9) is mounted on the mounting seat (1), and a transverse slide rail (91) is provided on the mounting plate (9) for the wedge-shaped push block (6) to move transversely, and a vertical slide rail (92) is provided on the mounting plate (9) for the lifting plate (7) to move vertically. The mounting seat (1) is provided with a plurality of springs (8) connected to the bottom of the lower mold (2) to form support for the lower mold (2).

4. An injection molding device for producing electric vehicle plastic parts according to any one of claims 1 to 3, characterized in that: A plurality of lower dies (2) are circumferentially mounted on the mounting seat (1); a rotatable rotating column (10) is provided at the center of the mounting seat (1); a lifting column (11) which can rotate with the rotating column (10) is provided at the center of the rotating column (10); the lifting column (11) can be lifted and lowered inside the rotating column (10), and the two are coaxially arranged; a connecting arm (12) is provided at the top of the lifting column (11); an upper die (13) corresponding to the lower die (2) is provided on a side of the connecting arm (12) away from the lifting column (11).

5. The injection molding equipment for producing electric vehicle plastic parts as claimed in claim 4, characterized in that: A support plate (101) is provided on the side wall of the bottom of the rotating column (10), and the support plate (101) is arranged directly below the connecting arm (12), and the top of the support plate (101) is flush with the bottom of the lower mold (2) to form support for the bottom of the lower mold (2) in the mold closing state.

6. The injection molding equipment for producing electric vehicle plastic parts as claimed in claim 4, characterized in that: The outer wall of the rotating column (10) is provided with a plurality of arc grooves (102) and vertical grooves (103) in the circumferential direction, and the upper side and the lower side of adjacent arc grooves (102) are connected with the same vertical groove (103), and the vertical groove (103) runs through the upper and lower ends of the rotating column (10), and the side wall of the lifting column (11) is provided with a lifting rod (111), and one side of the lifting rod (111) is provided with a push column (112) that matches the arc groove (102) and the vertical groove (103), and the bottom of the lifting column (11) is provided with a cylinder (113), and the bottom of the arc groove (102) is provided with a stopper (104) extending into the vertical groove (103), the top of the stopper (104) abuts against the inner side of the arc groove (102), and the bottom is provided with a V-shaped elastic block (105) to form a support for the stopper (104).

7. The injection molding equipment for producing electric vehicle plastic parts according to claim 6, characterized in that: A pressing frame (14) is provided at the top of the lifting column (11); the angle formed by the pressing frame (14) and the extension direction of the connecting arm (12) is an integer multiple of the angle between the axes of the adjacent lower molds (2) and the lifting column (11); and a plurality of pressing rods (15) are provided below the pressing frame (14) and cooperate with the top wall of the lower mold (2).

8. The injection molding equipment for producing electric vehicle plastic parts as claimed in claim 4, characterized in that: The lifting column (11) is provided with a protrusion in the vertical direction on its surface, and the rotating column (10) is provided with a groove matching the protrusion, so that the rotating column (10) can drive the lifting column (11) to rotate.

9. The injection molding equipment for producing electric vehicle plastic parts according to claim 4, characterized in that: The bottom of the rotating column (10) is rotatably connected to a base (106), and the bottom of the base (106) is provided with a plurality of support columns (107) connected to the mounting seat (1).

10. The injection molding equipment for producing electric vehicle plastic parts according to claim 6, characterized in that: A base plate is provided at the bottom of the cylinder (113), and the base plate is connected to the mounting seat (1) via a plurality of connecting columns.

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