Injection mold for lower body of automobile door panel

Abstract

The utility model discloses an injection mold of an automobile door panel lower body, the injection mold comprises an upper mold, a lower mold, a driving mechanism and a forming device, the upper mold, the lower mold and the forming device are mutually matched to form a cavity for forming the automobile door panel lower body, and the forming device is used for forming a grid net of the automobile door panel lower body; the forming device comprises a plurality of forming assemblies, the driving mechanism is installed on the lower die, and the output end of the driving mechanism is connected with the forming assemblies. The forming device has the beneficial effects that the integral forming device is divided into the multiple forming assemblies, then under driving of the driving mechanism, the multiple forming assemblies can be sequentially separated from the grid net for demolding, and therefore the damage risk of the grid net is remarkably reduced; and the demolding action of grouping one by one is realized, so that the demolding process is more stable, and the structural integrity and smoothness of the grid net during demolding are further protected.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to an injection mold for a lower body of an automobile door panel. Background Art

[0002] An injection mold is a tool used to produce plastic products; it also gives them a complete structure and precise dimensions. Injection molding is a processing method used for mass production of complex parts. Specifically, the process involves injecting heated, molten plastic into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the resulting molded product is formed.

[0003] like Figure 1 The figure shows the lower body 1 of an automobile door panel, a crucial component of automotive interior trim. Located on the inside of the door, it has two left and right sections and is formed using an injection mold. The product features a grid 101, a location with relatively weak strength. Existing injection molds use an ejector mechanism to directly eject the product. However, the weak grid 101 is easily damaged during forced ejection, compromising product quality. Therefore, an injection mold for the lower body of an automobile door panel is proposed to address this technical issue. Utility Model Content

[0004] One of the purposes of the present application is to provide an injection mold for the lower body of an automobile door panel.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is: an injection mold for the lower body of an automobile door panel, comprising an upper mold, a lower mold, a driving mechanism and a molding device, wherein the upper mold, the lower mold and the molding device cooperate with each other to form a cavity for molding the lower body of the automobile door panel, wherein the molding device is used to mold the grid mesh of the lower body of the automobile door panel; the molding device includes multiple molding components, the driving mechanism is installed on the lower mold and the output end is connected to the molding component; when demolding, the driving mechanism is suitable for driving the molding component to move step by step and away from the grid mesh until the molding device is separated from the molded grid mesh.

[0006] Preferably, the driving mechanism includes a plurality of telescopic devices, which are vertically mounted on the lower mold and whose piston ends are connected to the corresponding forming components; the telescopic devices are suitable for driving the forming components to move up and down through the piston ends.

[0007] Preferably, the fixed end of the telescopic device faces upward, and the piston end of the telescopic device faces downward; when demoulding, the telescopic device is suitable for extending and driving the molding component to move downward.

[0008] Preferably, the driving mechanism further includes a driving source and a plurality of valves, and the driving source is suitable for being connected to the telescopic device through the cooperation of the valves and pipelines.

[0009] Preferably, the molding assembly includes a support plate and a plurality of core blocks, the support plate is mounted on the piston end of the telescopic device, and the core blocks are spaced apart and mounted on the top end of the support plate.

[0010] Preferably, the support plate is in a disc-like structure, and a plurality of the support plates are coaxial and spaced apart from top to bottom.

[0011] Preferably, the molding device further comprises a grid block, which is detachably mounted on the lower mold and cooperates with the core block to form a grid net for molding products, and the core block is vertically inserted and slidably arranged in the grid cavity within the grid block.

[0012] Preferably, a needle cavity is provided through the top end of the grid block, and the needle cavity is suitable for cooperating with the ejector mechanism in the lower mold.

[0013] Preferably, the forming device further comprises a plurality of edge blocks, wherein the edge blocks are mounted at the top edges of the grid blocks, and the edge blocks are used to form meshes of the grid net near the edges.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The utility model divides the integral forming device into multiple forming components, and then, driven by a driving mechanism, allows the multiple forming components to be separated and demolded from the grid mesh in sequence, thereby significantly reducing the risk of damage to the grid mesh. The demolding action is achieved in groups, making the demolding process smoother and further protecting the structural integrity and smoothness of the grid mesh during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the lower body of the automobile door panel product of the present utility model.

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the upper mold after mold opening of the utility model.

[0019] Figure 4 This is a schematic diagram of the molding device and driving mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the specific structure of the molding device of the present utility model.

[0021] Figure 6 This is an enlarged structural diagram of point E of the present invention.

[0022] Figure 7 This is a schematic diagram of the specific structure of the molding component of the present utility model.

[0023] Figure 8 This is a schematic diagram of the preferred installation structure of the telescopic device of the present invention.

[0024] In the figure: 1. Lower body of automobile door panel; 101. Grid; 2. Upper mold; 3. Lower mold; 4. Ejector mechanism; 5. Forming device; 501. Grid block; 502. Forming assembly; 5021. Core block; 5022. Support plate; 6. Driving mechanism; 601. Telescopic device; 7. Side block; 8. Partition; 9. Grid cavity; 10. Needle cavity. DETAILED DESCRIPTION

[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] One of the preferred embodiments of this application is as follows: Figures 1 to 8 As shown, an injection mold for the lower body of an automobile door panel includes an upper mold 2, a lower mold 3, a driving mechanism 6 and a molding device 5. The upper mold 2, the lower mold 3 and the molding device 5 cooperate with each other to form a cavity for molding the lower body 1 of the automobile door panel, wherein the molding device 5 is used to mold the grid 101 of the lower body 1 of the automobile door panel; the molding device 5 includes a plurality of molding components 502, the driving mechanism 6 is installed on the lower mold 3 and the output end is connected to the molding component 502.

[0029] It is understandable that when demoulding is performed, the driving mechanism 6 is started, and the driving mechanism 6 can drive the forming assembly 502 to move step by step and away from the grid net 101 until the forming device 5 is separated from the formed grid net 101.

[0030] Thus, the present application divides the integral molding device 5 into a plurality of molding assemblies 502. Then, driven by the driving mechanism 6, the plurality of molding assemblies 502 can be sequentially separated and demolded from the grid 101, thereby significantly reducing the risk of damage to the grid 101. The demolding action is achieved one by one or in groups, making the demolding process smoother and further protecting the structural integrity and smoothness of the grid 101 during demolding.

[0031] The present application does not specifically limit the structure of the driving mechanism 6. A specific embodiment is provided below for reference:

[0032] like Figure 5 As shown, the drive mechanism 6 includes multiple telescopic devices 601, which are vertically mounted on the lower mold 3 and have piston ends connected to corresponding molding assemblies 502. It is understood that each molding assembly 502 is controlled by a corresponding telescopic device 601. In other words, by controlling the sequence of the telescopic devices 601, the multiple molding assemblies 502 can be demolded step by step.

[0033] It should be noted that the specific structure and working principle of the telescopic device 601 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here; common telescopic devices 601 include hydraulic cylinders or pneumatic cylinders, etc., and those skilled in the art can choose according to actual needs.

[0034] Furthermore, the telescopic device 601 is preferably installed in the following manner: Figure 8 As shown, the fixed end of the telescopic device 601 faces upward, and the piston end of the telescopic device 601 faces downward. Exemplarily, the telescopic device 601 is a hydraulic cylinder, the cylinder barrel of the hydraulic cylinder is fixedly installed above the interior of the lower mold 3, and the piston rod of the hydraulic cylinder faces downward. It should be noted that in a general hydraulic cylinder, the thrust is much greater than the pulling force. We also know that during the demolding and mold closing process of the molding component 502, the demolding force must be greater than the mold closing force. We use the larger thrust generated by the hydraulic cylinder to realize the demolding of the molding component 502 (i.e., the hydraulic cylinder extends to drive the molding component 502 downward), and the relatively small pulling force generated by the hydraulic cylinder to realize the mold closing of the molding component 502. Through such a rational design, while ensuring production efficiency and molding quality, a suitably smaller hydraulic cylinder can be selected, thereby reducing costs and reducing the space required for mold installation.

[0035] It should be noted that, regarding the specific installation method of the hydraulic cylinder: if there are only a small number of forming components 502 (for example, only one or two groups), the normal installation method can be used, and then a hydraulic cylinder with a larger power can be used. However, if there are a large number of forming components 502, such as Figure 7 As shown, for example, when four groups are used in this application, in order to rationalize the installation of the hydraulic cylinder, it is preferred to adopt the above-mentioned inverted installation method.

[0036] Based on the aforementioned use of multiple telescopic devices 601, in this embodiment, the drive mechanism 6 further includes a drive source and multiple valves (not shown). The drive source can be connected to the telescopic devices 601 through the cooperation of valves and pipelines. In other words, the multiple telescopic devices 601 share a single drive source, which then controls the telescopic devices 601 through the control of the valves.

[0037] Exemplarily, the telescopic device 601 adopts a pneumatic cylinder, and the driving source is an air supply device (such as an air pump). The air pump supplies air to the pneumatic cylinder through a pipeline, and a valve (such as a solenoid valve) controls the on-off of the air circuit. The precise mold closing and demolding actions of the molding component 502 are achieved by the order in which the valves are opened.

[0038] Based on the above embodiment, although it can realize the sequential demolding of multiple molding components 502, we know that the grid net 101 on the product (i.e., the lower body 1 of the automobile door panel, hereinafter referred to as the product) is composed of multiple evenly distributed mesh holes. If multiple adjacent mesh holes are demolded at the same time, it is still easy for the grid net 101 to be locally damaged during demolding.

[0039] Therefore, in order to solve the above technical problems, in one embodiment of the present application, Figure 7As shown, the molding assembly 502 includes a support plate 5022 and a plurality of core blocks 5021, wherein the plurality of core blocks 5021 are spaced apart and mounted on the top of the support plate 5022, and the support plate 5022 is fixedly mounted on the piston end of the telescopic device 601. It is understandable that the division of the molding assembly 502 at this time is not divided according to the area of ​​the grid 101, for example, divided into three or four equal parts according to the area. Its plurality of core blocks 5021 are divided in an indefinite manner, and the core blocks 5021 located on the same molding assembly 502 are spaced apart. In this way, when the molding assembly 502 is demoulded downward, the phenomenon of two adjacent core blocks 5021 being demoulded at the same time will not occur. Instead, the core blocks 5021 spaced apart are demoulded in sequence, effectively avoiding the risk of local damage. In addition, the design of the support plate 5022 not only provides a mounting platform for the core blocks 5021, but also provides additional support during the demoulding process, ensuring the stability of the demoulding process. Through this design, the stress concentration on the grid mesh 101 can be further reduced, thereby protecting the integrity of its structure.

[0040] Further, such as Figure 4 and Figure 8 As shown, the support plate 5022 can be a disc-shaped structure, with multiple support plates 5022 coaxial and spaced from top to bottom. Figure 8 As shown, we assume that the four support plates 5022 from top to bottom are (A)(B)(C)(D), then the core block 5021 on the (D) support plate 5022 will penetrate (A)(B)(C), similarly, the core block 5021 on the (C) support plate 5022 will penetrate (A)(B), and the core block 5021 on the (B) support plate 5022 will penetrate (A), that is, the support plates 5022 and the core blocks 5021 guide and limit each other, thereby making the stability between the multiple molding components 502 stronger.

[0041] In this embodiment, Figure 5 As shown, assuming that the formation of the grid 101 is entirely dependent on multiple forming components 502, and the forming components 502 are composed of multiple core blocks 5021, it is necessary to ensure that the multiple core blocks 5021 are closely matched. Moreover, the matching between the multiple core blocks 5021 will also have errors over time. This requires high processing accuracy and is difficult to repair if damaged. Therefore, as an improved design, Figure 5 and Figure 6 As shown, the forming device 5 further includes a grid block 501, which is detachably mounted on the lower mold 3 by bolts, and the grid block 501 cooperates with the core block 5021 to form the grid mesh 101 of the product. Specifically, as Figure 6As shown, a plurality of connected partitions 8 are provided in the grid block 501 , the partitions 8 enclose a grid cavity 9 , and the core block 5021 is vertically inserted and slidably provided in the grid cavity 9 in the grid block 501 .

[0042] It is understood that the multiple core blocks 5021 are now independently designed through the grid cavities 9, and the grid cavities 9 also provide positioning and guidance for the core blocks 5021. This eliminates the need to consider the tight fit between adjacent core blocks 5021, further enhancing the flexibility and adaptability of the molding assembly 502. Furthermore, the introduction of the grid blocks 501 not only simplifies the maintenance and replacement process of the molding device 5 but also reduces overall production costs.

[0043] like Figure 6 As shown, since the grid block 501 is stationary during demolding, after the core block 5021 and the grid mesh 101 are demolded, a small portion of the grid mesh 101 is still bonded to the top of the barrier layer 8. At this time, a pin cavity 10 can be provided inside the grid cavity 9 (i.e., the top of the barrier layer 8). The pin cavity 10 cooperates with the ejector mechanism 4 of the mold itself, i.e., the ejector of the ejector mechanism 4 is located in the pin cavity 10, and subsequent thorough demolding is performed through the ejector mechanism 4. Of course, the ejector mechanism 4 of the mold is also common knowledge known to those skilled in the art, so it will not be described in detail.

[0044] Further, such as Figure 5 and Figure 6 As shown, the mesh shapes near the edges of the grid net 101 are generally irregular and of various shapes. Especially for some small and irregularly shaped meshes, damage is likely to occur when they are formed by a single core block 5021. Therefore, the forming device 5 also includes a plurality of side blocks 7, which are installed at the top edge of the grid block 501. The side blocks 7 are used to form the meshes near the edges of the grid net 101, and the meshes near the edges are directly connected to the product itself, so the strength is relatively large, and there is no need to worry about damage during the subsequent ejector demolding process.

[0045] The working principle of this utility model is:

[0046] During mold opening, that is, when the upper mold 2 and the lower mold 3 are separated, and the product is subsequently demolded, the drive mechanism 6 is activated, and different telescopic devices 601 are activated in different orders, thereby driving different forming components 502 to move downward and separate from the grid 101 for demolding. It should be noted that after one group of forming components 502 is moved downward and demolded, the telescopic device 601 is used to move the forming components 502 upward. In this way, the forming components 502 can still be reset after demolding and support the corresponding mesh on the grid 101. Then, the next group of forming components 502 is moved downward and demolded and moved upward and reset, and the above process is repeated. Thus, each molding assembly 502 is independently demolded in sequence, and after demolding, it can be reset to support the corresponding mesh. In addition, the core blocks 5021 on each molding assembly 502 are also spaced apart. For example, when one core block 5021 is moved downward for demolding, its adjacent core block 5021 will be in a stationary supporting state. In this way, the grid mesh 101 of the product will not be damaged during the subsequent demolding process, ensuring a smooth demolding process and avoiding quality problems of the finished product caused by improper demolding. Finally, the product is ejected from the lower mold 3 by the ejector mechanism 4.

[0047] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An injection mold for the lower body of an automobile door panel, characterized in that: include: An upper mold, a lower mold, a driving mechanism and a molding device, wherein the upper mold, the lower mold and the molding device cooperate with each other to form a cavity for molding the lower body of the automobile door panel, wherein the molding device is used to mold the grid mesh of the lower body of the automobile door panel; the molding device includes a plurality of molding components, the driving mechanism is installed on the lower mold and the output end is connected to the molding component; when demolding, the driving mechanism is suitable for driving the molding component to move step by step and away from the grid mesh until the molding device is separated from the molded grid mesh.

2. The injection mold for the lower body of an automobile door panel according to claim 1, characterized in that: The driving mechanism includes a plurality of telescopic devices, which are vertically mounted on the lower mold and whose piston ends are connected to the corresponding forming assemblies; the telescopic devices are suitable for driving the forming assemblies to move up and down through the piston ends.

3. The injection mold for the lower body of an automobile door panel according to claim 2, characterized in that: The fixed end of the telescopic device faces upward, and the piston end of the telescopic device faces downward; when demoulding, the telescopic device is suitable for stretching and driving the molding component to move downward.

4. The injection mold for the lower body of an automobile door panel according to claim 3, characterized in that: The driving mechanism further includes a driving source and a plurality of valves, and the driving source is suitable for being connected to the telescopic device through the cooperation of the valves and pipelines.

5. The injection mold for the lower body of an automobile door panel according to claim 3, characterized in that: The molding assembly includes a support plate and a plurality of core blocks. The support plate is mounted on the piston end of the telescopic device. The core blocks are spaced apart and mounted on the top end of the support plate.

6. The injection mold for the lower body of an automobile door panel according to claim 5, characterized in that: The support plate is in a disc-like structure, and a plurality of the support plates are coaxial and spaced apart from top to bottom.

7. The injection mold for the lower body of an automobile door panel according to claim 6, characterized in that: The molding device also includes a grid block, which is detachably mounted on the lower mold and cooperates with the core block to form a grid net for the product. The core block is vertically inserted and slidably arranged in the grid cavity in the grid block.

8. The injection mold for the lower body of an automobile door panel according to claim 7, characterized in that: A needle cavity is provided through the top end of the grid block, and the needle cavity is suitable for cooperating with the ejector mechanism in the lower mold.

9. The injection mold for the lower body of an automobile door panel according to claim 8, characterized in that: The forming device further comprises a plurality of edge blocks, wherein the edge blocks are mounted at the top edges of the grid blocks and are used to form meshes of the grid net near the edges.

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