Pre-ejection demolding mechanism of injection mold for front storage box of electric vehicle

Abstract

The utility model provides a pre-ejection demolding mechanism of an injection mold for a front storage box of an electric vehicle, and belongs to the technical field of molds. The die comprises an upper die plate and a lower die plate, a forming cavity is formed between the upper die plate and the lower die plate, a forming insert is arranged in the middle of the lower die plate in a protruding mode, a lower forming face forming the forming cavity is formed on the upper surface of the forming insert, and the edge of the forming insert is in a cambered surface shape. The forming cavity between the upper mold plate and the lower mold plate can be subjected to injection molding to form the front storage box of the electric vehicle, after the front storage box of the electric vehicle is subjected to injection molding, a product can be ejected out of the lower mold plate through the combined ejection mechanism, and a pre-ejection assembly in the combined ejection mechanism can apply thrust to the inner side of the edge of the product in advance before the product is ejected out; product damage caused by the fact that pressure borne by the edge of a product at a time is too large when the product is ejected out is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a pre-ejection and demolding mechanism for injection molds of front storage boxes for electric vehicles. Background Technology

[0002] Electric vehicle front storage boxes are generally injection molded. After injection molding, the product attached to the lower mold plate needs to be ejected by an ejection mechanism. However, traditional ejection mechanisms use multiple ejector blocks distributed on the lower mold plate to apply pushing force to the product simultaneously. The ejector blocks at different positions do not eject in sequence, which causes the product edges to be subjected to excessive pressure at one time during ejection, which can easily damage the product.

[0003] For example, a Chinese patent discloses a local heating mechanism for an injection molding die of an electric vehicle storage box [Application No.: 202323328580.0], which includes a lower injection mold and an upper injection mold for an electric vehicle storage box. The lower injection mold has a forming lower protrusion. In the injection molding process, the lower and upper injection molds of the electric vehicle storage box are brought close to each other, so that the forming lower protrusion cooperates with the embedded central molding part to form a complete cavity. Molten material is injected through the injection molding part, and then the molten material is sent into the cavity through the injection molding connector. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a pre-ejection and demolding mechanism for injection molds of front storage boxes for electric vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pre-ejection demolding mechanism for an injection mold of a front storage box for an electric vehicle includes an upper mold plate and a lower mold plate. A molding cavity is provided between the upper and lower mold plates. A molding insert is protruding from the middle of the lower mold plate. The lower molding surface that forms the molding cavity is formed on the upper surface of the molding insert. The edge of the molding insert is arc-shaped. In the length direction of the lower mold plate, the height of the middle part of the upper end face of the molding insert gradually increases from one side to the other. In the width direction of the lower mold plate, a combined ejection mechanism with a pre-ejection component is provided on both sides of the molding insert.

[0007] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the combined ejection mechanism includes a pre-ejection assembly and an integral ejection assembly.

[0008] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the pre-ejection assembly and the overall ejection assembly are located on the inner and outer sides of the outer edge of the molding cavity, respectively.

[0009] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, an upper top plate and a lower top plate are provided on the lower side of the lower template, the integral ejection assembly is connected to the upper top plate, the pre-ejection assembly passes through the upper top plate and is connected to the lower top plate, and there is a pre-ejection gap between the upper top plate and the lower top plate.

[0010] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the pre-ejection assembly includes several pre-ejection blocks disposed on the molding insert. The several pre-ejection blocks are spaced apart along the length of the lower template at the two sides of the molding insert. The bottom of the pre-ejection blocks is connected to the lower top plate through an inclined ejector rod.

[0011] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the top of the inclined ejector rod is inclined towards the center of the lower mold plate.

[0012] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the bottom end of the inclined ejector rod passes through the through slot set on the upper top plate and rotates with the lower template through the adapter seat.

[0013] In the above-mentioned pre-ejection and demolding mechanism of the injection mold for the front storage box of the electric vehicle, the overall ejection assembly includes several outer ejector blocks arranged on the lower template. The several outer ejector blocks are arranged circumferentially along the outer edge of the molding insert and the inner end of the outer ejector block abuts against the outer edge of the molding insert. The outer ejector blocks are connected to the upper top plate through a first straight ejector rod.

[0014] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, several vertically arranged No. 2 straight ejector rods are fixedly connected to the upper ejector plate, and the top of the No. 2 straight ejector rods is connected to the molding cavity.

[0015] In the aforementioned pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box, the upper and lower templates are respectively provided with upper cooling channels and lower cooling channels located on the upper and lower sides of the molding cavity.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The molding cavity between the upper and lower mold plates can be injection molded to form the front storage box of the electric vehicle. After the front storage box of the electric vehicle is injection molded, the product can be ejected from the lower mold plate by the combined ejection mechanism. The pre-ejection component in the combined ejection mechanism can apply a thrust to the inner side of the product edge before the product is ejected, so as to prevent the product edge from being damaged by excessive pressure at one time during ejection.

[0018] 2. When the product is ejected, the inner side of the outer edge of the product is first pushed by the pre-ejection component to separate the inner side of the outer edge of the product from the molding insert. Then, the product is ejected as a whole by the overall ejection component, which can effectively avoid damage to the product edge during ejection.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a structural diagram of the lower template;

[0023] Figure 4 This is a schematic diagram of a combined ejection mechanism. Detailed Implementation

[0024] like Figures 1-4 As shown, a pre-ejection demolding mechanism for an injection mold of a front storage box for an electric vehicle includes an upper mold plate 1 and a lower mold plate 2. A molding cavity 3 is provided between the upper mold plate 1 and the lower mold plate 2. A molding insert 4 is protruding from the middle of the lower mold plate 2. The lower molding surface 5 that forms the molding cavity 3 is formed on the upper surface of the molding insert 4. The edge of the molding insert 4 is arc-shaped. In the length direction of the lower mold plate 2, the height of the middle part of the upper end face of the molding insert 4 gradually increases from one side to the other. In the width direction of the lower mold plate 2, a combined ejection mechanism with a pre-ejection component 6 is provided on both sides of the molding insert 4.

[0025] In this invention, the molding cavity between the upper and lower molds can be injection molded to form the front storage box of an electric vehicle. After the front storage box of the electric vehicle is injection molded, the product can be ejected from the lower mold through a combined ejection mechanism. The pre-ejection component 6 in the combined ejection mechanism can apply a thrust to the inner side of the product edge before the product is ejected, so as to prevent the product edge from being damaged by excessive pressure during ejection.

[0026] Specifically, the combined ejection mechanism includes a pre-ejection assembly 6 and an integral ejection assembly 7, which are located on the inner and outer sides of the outer edge of the molding cavity 3, respectively. During product ejection, the pre-ejection assembly 6 first applies a pushing force to the inner side of the outer edge of the product to detach the inner side of the outer edge from the molding insert, and then the integral ejection assembly ejects the product as a whole to demold, which can effectively avoid damage to the product edges during ejection.

[0027] Specifically, an upper ejector plate 8 and a lower ejector plate 9 are provided on the lower side of the lower mold plate 2. The integral ejection assembly 7 is connected to the upper ejector plate 8, and the pre-ejection assembly 6 passes through the upper ejector plate 8 and is connected to the lower ejector plate 9. There is a pre-ejection gap 10 between the upper ejector plate 8 and the lower ejector plate 9. When the product is ejected, the lower ejector plate first moves upward a short distance so that the pre-ejection assembly 6 can apply a pushing force to the inner side of the outer edge of the product in advance. Then the upper ejector plate moves upward so that the integral ejection assembly can eject the product as a whole and demold it.

[0028] Specifically, the pre-ejection assembly 6 includes several pre-ejection blocks 11 disposed on the molding insert 4. These pre-ejection blocks 11 are spaced apart along the length of the lower template 2 at both edges of the molding insert 4. The bottom of each pre-ejection block 11 is connected to the lower top plate 9 via a slanted ejector rod 12. The top of the slanted ejector rod 12 is inclined towards the center of the lower template 2, and the bottom of the slanted ejector rod 12 passes through a through slot on the upper top plate 8 and rotatably engages with the lower template 2 via an adapter seat 13. When the lower top plate moves upward, the slanted ejector rods can drive the pre-ejection blocks to move obliquely upward towards the center of the lower template, thereby applying an oblique upward thrust to the inner side of the outer edge of the product, causing the inner side of the outer edge of the product to detach from the molding insert.

[0029] Specifically, the overall ejection assembly 7 includes several outer ejector blocks 14 disposed on the lower template 2. These outer ejector blocks 14 are circumferentially arranged along the outer edge of the forming insert 4, with their inner ends abutting against the outer edge of the forming insert 4. The outer ejector blocks 14 are connected to the upper top plate 8 via a first straight ejector rod 15. Several vertically arranged second straight ejector rods 16 are fixedly connected to the upper top plate 8, with their tops connected to the forming cavity 3. The upward movement of the upper top plate applies a vertically upward thrust to the product via the first straight ejector rod and the outer ejector blocks, and also applies a vertically upward thrust to the product via the second straight ejector rods, thereby ejecting the product entirely from the lower template.

[0030] Preferably, the upper mold plate 1 and the lower mold plate 2 are respectively provided with an upper cooling channel 17 and a lower cooling channel 18 located on the upper and lower sides of the molding cavity 3. The upper cooling channel 17 and the lower cooling channel 18 can facilitate the cooling of the injection liquid in the molding cavity by coolant after the product is injection molded.

[0031] The working principle of this utility model is as follows: the molding cavity between the upper and lower molds can be injection molded to form the front storage box of the electric vehicle. After the front storage box of the electric vehicle is injection molded, the product can be ejected from the lower mold through the combined ejection mechanism. The pre-ejection component 6 in the combined ejection mechanism can apply a pushing force to the inner side of the edge of the product before the product is ejected, so as to prevent the product edge from being damaged by excessive pressure at one time during ejection.

[0032] When the product is ejected, the pre-ejection component 6 first applies a pushing force to the inner side of the outer edge of the product to disengage the inner side of the outer edge from the molding insert. Then, the overall ejection component ejects the product as a whole to demold. This effectively avoids damage to the product edges during ejection. When the product is ejected, the lower ejector plate moves upward a short distance to apply a pushing force to the inner side of the outer edge of the product through the pre-ejection component 6. Then, the upper ejector plate moves upward to eject the product as a whole through the overall ejection component. When the lower ejector plate moves upward, it can drive the pre-ejection block to move obliquely upward toward the center of the lower mold plate through the inclined ejector rod, thereby applying an oblique upward pushing force to the inner side of the outer edge of the product to disengage the inner side of the outer edge from the molding insert. When the upper ejector plate moves upward, it can apply a vertical upward pushing force to the product through the first straight ejector rod and the outer ejector block. At the same time, it can also apply a vertical upward pushing force to the product through the second straight ejector rod, thereby ejecting the product as a whole from the lower mold plate.

[0033] The upper cooling channel 17 and the lower cooling channel 18 facilitate the use of coolant to cool the injection liquid in the molding cavity after the product has been injection molded.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pre-ejection and demolding mechanism for an injection mold of a front storage box for an electric vehicle, comprising an upper template (1) and a lower template (2), characterized in that, A forming cavity (3) is provided between the upper template (1) and the lower template (2). A forming insert (4) is provided in the middle of the lower template (2). The lower forming surface (5) that makes up the forming cavity (3) is formed on the upper surface of the forming insert (4). The edge of the forming insert (4) is arc-shaped. In the length direction of the lower template (2), the height of the middle part of the upper end face of the forming insert (4) gradually increases from one side to the other side. In the width direction of the lower template (2), a combined ejection mechanism with a pre-ejection component (6) is provided on both sides of the forming insert (4).

2. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 1, characterized in that, The combined ejection mechanism includes a pre-ejection assembly (6) and an integral ejection assembly (7).

3. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 2, characterized in that, The pre-ejection assembly (6) and the integral ejection assembly (7) are located on the inner and outer sides of the outer edge of the molding cavity (3), respectively.

4. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 3, characterized in that, The lower template (2) is provided with an upper top plate (8) and a lower top plate (9) on its lower side. The overall ejection assembly (7) is connected to the upper top plate (8). The pre-ejection assembly (6) passes through the upper top plate (8) and is connected to the lower top plate (9). There is a pre-ejection gap (10) between the upper top plate (8) and the lower top plate (9).

5. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 4, characterized in that, The pre-ejection assembly (6) includes several pre-ejection blocks (11) disposed on the molding insert (4). The pre-ejection blocks (11) are spaced apart at both sides of the molding insert (4) along the length direction of the lower template (2). The bottom of the pre-ejection blocks (11) is connected to the lower top plate (9) through an inclined ejector rod (12).

6. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 5, characterized in that, The top of the inclined top rod (12) is inclined towards the center of the lower template (2).

7. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 5, characterized in that, The bottom end of the inclined top rod (12) passes through the through groove set on the upper top plate (8) and rotates with the lower template (2) through the adapter seat (13).

8. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 4, characterized in that, The overall ejection assembly (7) includes several outer ejector blocks (14) arranged on the lower template (2). The several outer ejector blocks (14) are arranged circumferentially along the outer edge of the forming insert (4) and the inner end of the outer ejector block (14) abuts against the outer edge of the forming insert (4). The outer ejector blocks (14) are connected to the upper top plate (8) through a first straight ejector rod (15).

9. The pre-ejection and demolding mechanism for the injection mold of the electric vehicle front storage box according to claim 8, characterized in that, Several vertically arranged second straight push rods (16) are fixedly connected to the upper top plate (8), and the top of the second straight push rods (16) is connected to the molding cavity (3).

10. The pre-ejection and demolding mechanism for the injection mold of the front storage box of an electric vehicle according to claim 1, characterized in that, The upper template (1) and the lower template (2) are respectively provided with an upper cooling channel (17) and a lower cooling channel (18) located on the upper and lower sides of the molding cavity (3).

Images