An ejection mechanism for automobile door panel injection molding

Abstract

The utility model relates to the technical field of injection molding, and discloses an ejection mechanism for automobile door panel injection molding, including a movable mold and a fixed mold, the movable mold and the fixed mold enclose an outer cavity and an inner cavity for molding a speaker mesh structure, a first ejection mechanism and a second ejection mechanism are slidably connected to the movable mold, and in a mold-closing state of the movable mold and the fixed mold, the first ejection mechanism contacts the outer cavity, the second ejection mechanism contacts the inner cavity, and the ejection distance of the first ejection mechanism is greater than the ejection distance of the second ejection mechanism. The utility model patent solves the problem that defects are prone to occur when molding the speaker mesh structure in the lower trim of the automobile door panel in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an ejection mechanism for injection molding of automobile door panels. Background Art

[0002] like Figure 1 and Figure 2 As shown, the main structure of the lower trim of the automobile door panel includes a speaker mesh structure, wherein the speaker mesh structure is mainly composed of the outer structure of the outer shell part and the inner structure of the internal mesh part. During the injection molding process of the lower trim body, the remaining structure is relatively simple and can be easily injection molded, but there are great difficulties in molding the speaker mesh structure.

[0003] When forming the speaker mesh structure, Figure 1 and Figure 2 It can be seen that the speaker mesh structure mainly includes an outer structure and an inner structure. Therefore, in the process of designing the molding mold, when the movable mold and the fixed mold are closed, an outer cavity for molding the outer structure and an inner cavity for molding the inner structure will be mainly formed. From the overall structure of the speaker mesh, it can be seen that the outer structure is simple and the demolding process is smooth. In the inner mesh structure formed by the inner cavity, according to the requirements of speaker volume propagation and sound transmittance, the mesh layout needs to be relatively dense, and its mesh area is close to half of the area of ​​the inner structure. Therefore, after the product is formed, the clamping force between the mesh of the inner structure and the movable mold is relatively large, which makes demolding difficult, causing local deformation of the speaker mesh and resulting in quality defects. Utility Model Content

[0004] The utility model aims to provide an ejection mechanism for automobile door panel injection molding, so as to solve the problem that defects are easily generated when molding the speaker mesh structure in the lower trim plate of the automobile door panel in the prior art.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions: an ejection mechanism for automobile door panel injection molding, including a movable mold and a fixed mold, the movable mold and the fixed mold enclose an outer cavity and an inner cavity for molding a speaker mesh structure, a first ejection mechanism and a second ejection mechanism are slidably connected to the movable mold, and when the movable mold and the fixed mold are in a mold-clamped state, the first ejection mechanism contacts the outer cavity, the second ejection mechanism contacts the inner cavity, and the ejection distance of the first ejection mechanism is greater than the ejection distance of the second ejection mechanism.

[0006] When faced with the problem of quality defects in the molding of the speaker mesh structure, the inventor believed that the main reason for the quality defects of the mesh part of the inner structure was that the mesh layout was very dense, which caused a large clamping force between the inner structure and the movable mold, making demolding difficult and causing defects. Therefore, the inventor believed that only more ejector pin structures needed to be set at the inner cavity to stably and accurately eject the inner structure.

[0007] However, in actual operation, the inventor encountered great resistance. Due to the small structural area of ​​the inner side of the speaker mesh, it is impossible to set a large number of ejector structures. Therefore, there are great difficulties in setting the ejector. Further, the inventor changed his mind and used ejectors with smaller diameters to eject the inner structure. Although it can be achieved in theory, the actual situation is that the overall ejection distance of the door panel lower trim body is relatively long. If the ejector is set to the ejection length of the entire door panel lower trim body, due to the small diameter of the ejector, when the ejector length is too long, the ejector is prone to deformation, breakage, and jamming, etc., so it is still impossible to achieve the ejection of the speaker mesh structure well. Finally, the inventor continued to improve on this basis, and believed that as long as a two-stage ejection mechanism is designed and the ejection distance for ejecting the inner structure is controlled within a small distance, the ejector can be used to complete the mesh of the inner structure. Therefore, the technical solution of this application was finally designed.

[0008] The principle and beneficial effect of the present scheme are as follows: in the present application, by setting a first ejection mechanism and a second ejection mechanism, when the fixed mold and the movable mold are closed, the first ejection mechanism contacts the outer cavity, and the second ejection mechanism contacts the inner cavity. After the injection molding is completed, the first ejection mechanism ejects the outer structure of the mesh structure, and the second ejection mechanism ejects the mesh part of the inner structure. Since the ejection distance of the first ejection mechanism is greater than the ejection distance of the second ejection mechanism, the ejection distance of the second ejection mechanism can be set to a smaller state, which provides favorable conditions for installing the ejector pin, so that even if an ejector pin with a smaller diameter is set to eject the inner structure, the ejector pin is not prone to damage or jamming, and the demolding of the speaker mesh structure is smoother, so that the molding quality of the speaker mesh structure in the lower trim body of the automobile door panel is better and it is not easy to have quality defects.

[0009] Preferably, as an improvement, the second ejection mechanism comprises an upper ejector plate, an inner ejector rod and an ejector pin, the upper ejector plate is slidably matched with the movable mold, and the ejector pin is fixedly connected to the upper ejector plate.

[0010] In this solution, the second ejection mechanism includes an ejector pin. When the inner ejector rod is pushed by power, the inner ejector rod can push the upper ejector pin plate to slide relative to the movable mold, so that the ejector pin ejects the inner structure of the speaker mesh. The structure is simple and easy to implement.

[0011] Preferably, as an improvement, there are multiple ejector pins, and the multiple ejector pins are evenly arranged on one side of the inner cavity.

[0012] In this solution, there are multiple ejector pins, which are all fixedly connected to the upper ejector plate. The upper ejector plate is used to simultaneously push the multiple ejector pins to move, thereby stably ejecting the inner structure of the speaker mesh. The inner structure is evenly stressed and is less likely to have defects when being ejected, thereby effectively ensuring the molding quality of injection molding.

[0013] Preferably, as an improvement, a sliding cavity is opened on the movable mold, and a fixed plate for sealing the opening of the sliding cavity is fixedly connected to the movable mold, and the fixed plate and the sliding cavity enclose a sliding space for the upper ejector plate to slide relative to the fixed mold.

[0014] In this solution, a relatively sealed sliding space is formed by the fixed plate and the sliding cavity, and the upper ejector plate is slidably connected in the sliding space, so that the sliding of the upper ejector plate is more stable and accurate, thereby effectively reducing the occurrence of breakage and jamming of the ejector during the ejection process.

[0015] Preferably, as an improvement, a guide column is fixedly connected to the fixing plate, and the upper ejector plate is slidably matched with the guide column.

[0016] In this solution, by connecting the guide column to the fixed plate, the guide column is used to provide sliding guidance for the upper ejector plate, so that the upper ejector plate can slide more accurately, so that the ejector with a smaller diameter can accurately complete the ejection action of the inner structure.

[0017] Preferably, as an improvement, the first ejection mechanism comprises a lower ejector plate 1, an outer ejector rod and an ejector block, the outer ejector rod is fixedly connected between the lower ejector plate 1 and the ejector block, and the ejector block is slidably matched with the movable mold.

[0018] In this solution, the first fixing mechanism uses a push rod and a push block to push out the outer structure of the speaker mesh, which has a simple structure and a smooth pushing action.

[0019] Preferably, as an improvement, the ejector block and the outer ejector rod form a group of outer ejector groups, the number of the outer ejector groups is multiple, and the multiple groups of outer ejector groups are arranged along the outer contour line of the outer cavity.

[0020] In this solution, multiple groups of outer ejection groups are provided to improve the stability of the outer structure when it is ejected.

[0021] Preferably, as an improvement, an outer sleeve is fixedly connected to the movable mold, and the outer ejector rod is slidably matched with the outer sleeve.

[0022] In this solution, an outer sleeve is fixedly connected to the movable mold, and the outer sleeve is used to provide guidance for the outer ejector rod, so that the ejector block connected to the outer ejector rod can stably complete the ejection action.

[0023] Preferably, as an improvement, it further comprises a lower ejector plate 2, wherein the lower ejector plate 1 is located between the lower ejector plate 2 and the fixed plate, and the inner ejector rod is fixedly connected between the lower ejector plate 2 and the upper ejector plate.

[0024] In the present solution, the second lower ejector plate is arranged between the second lower ejector plate and the fixed plate. When the mold is closed, the second lower ejector plate contacts the first lower ejector plate. When the mold is opened, an external force is used to push the second lower ejector plate to move, and the second lower ejector plate pushes the inner ejector rod and the upper ejector plate to move. When the ejector pin pushes the inner structure to demold, the second lower ejector plate also pushes the first lower ejector plate to move, so that the lower ejector plate pushes the outer ejector rod and the ejector block to move. At this time, the ejector block and the ejector pin push the inner and outer structures of the speaker net to demold synchronously, so as to realize the synchronization of demolding of the speaker net conveniently and accurately. When the upper ejector plate stops moving, other external forces are used to continue to push the first lower ejector plate to move, so that the ejector block can push the speaker net to continue demolding. At this time, the ejector pin no longer moves, and the inner structure of the speaker net has also been successfully demolded.

[0025] Preferably, as an improvement, a mounting groove is provided on the movable mold, a movable seat is fixedly connected in the mounting groove, and the movable seat and the fixed mold form the inner cavity.

[0026] Since the holes of the mesh part of the inner structure of the speaker mesh structure are densely arranged, the processing of the dynamic mold structure used to form the inner structure of the speaker mesh structure is complicated and requires high processing precision. The speaker mesh structure is relatively small in area relative to the entire automobile door panel lower trim body. Processing the dynamic mold part used to form the speaker mesh structure on the entire dynamic mold is difficult and inconvenient. Once there are defects in the processing, the entire dynamic mold will be scrapped, which puts great pressure on the mold manufacturing cost. In this solution, the part used to form the inner structure is separated out, and by setting a movable seat, the movable seat is used to enclose the inner cavity for forming the inner structure of the speaker mesh. The movable seat structure is processed separately, which is more convenient. Even if there is a processing error, it will not affect the entire dynamic mold structure, thereby effectively reducing cost pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the speaker mesh structure.

[0028] Figure 2 This is a schematic diagram of the speaker mesh structure from another perspective.

[0029] Figure 3 This is a schematic diagram of Embodiment 1 of the present utility model.

[0030] Figure 4 for Figure 3 Schematic diagram after hiding the movable mold.

[0031] Figure 5 It is a schematic diagram of the bottom view of the movable mold in the first embodiment of the utility model.

[0032] Figure 6 It is a schematic diagram of the movable seat in the first embodiment of the utility model.

[0033] Figure 7 It is a schematic diagram of the connection between the upper ejector plate, the ejector, the movable seat and the speaker mesh structure in the first embodiment of the utility model. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The figure marks in the drawings of the specification include: speaker mesh structure 1, outer structure 101, inner structure 102, movable mold 2, sliding cavity 201, movable seat 3, lower ejector plate 1 4, outer ejector rod 5, ejector block 6, outer sleeve 7, upper ejector plate 8, inner ejector rod 9, ejector 10, fixed plate 11, guide column 12, lower ejector plate 2 13.

[0036] like Figure 1 and Figure 2 As shown, the lower trim body of the automobile door panel includes a speaker mesh structure 1, wherein the speaker mesh structure 1 includes an outer structure 101 of an outer shell and an inner structure 102 with a mesh structure located in the outer structure 101. During molding, it is necessary to set an inner cavity for molding the inner structure 102, and set an outer cavity for molding the outer structure 101.

[0037] This embodiment is shown in the attached Figure 3 and Figure 4 As shown: A strong demoulding device for soft rubber products, including a movable mold 2 and a fixed mold (the fixed mold is not shown), the movable mold 2 and the fixed mold enclose a cavity for molding other parts of the door panel lower trim body, and an outer cavity and an inner cavity for molding the outer structure 101 and the inner structure 102 of the speaker mesh respectively. In this embodiment, since there are a large number of meshes in the inner structure 102 of the speaker mesh, if the part for molding the inner structure 102 is directly processed on the movable mold 2, the structure of this part is complicated and difficult to process. Therefore, in this embodiment, an installation groove is opened on the top surface of the movable mold 2, combined with Figure 3 and Figure 6 A movable seat 3 is fixedly installed in the mounting groove by screws. The movable seat 3 and the movable mold 2 are used to enclose the aforementioned inner cavity. The movable seat 3 is processed separately, which is beneficial to reducing the mold processing and manufacturing cost.

[0038] like Figure 4 and Figure 5 As shown, a first ejection mechanism and a second ejection mechanism are slidably connected to the movable mold 2. When the movable mold 2, the fixed mold and the movable seat 3 together form an outer cavity and an inner cavity for molding the speaker mesh structure 1, and when the movable mold 2 and the fixed mold are closed, the first ejection mechanism contacts the outer cavity, and the second ejection mechanism contacts the inner cavity.

[0039] Specific, combined Figure 4 and Figure 7The first ejection mechanism includes a lower ejector plate 4, an outer ejector rod 5 and an ejector block 6. The bottom end of the outer ejector rod 5 is fixedly connected to the lower ejector plate 4 by screws, and the ejector block 6 is fixedly connected to the top of the outer ejector rod 5 by screws. The outer sleeve 7 is fixedly connected to the movable mold 2. The outer ejector rod 5 and the outer sleeve 7 are slidably matched. When the movable mold 2 and the fixed mold are molded, the top of the ejector block 6 contacts the bottom surface of the outer cavity. In this embodiment, the ejector block 6 and the outer ejector rod 5 form a group of outer ejector groups. The number of outer ejector groups is multiple, and the multiple groups of outer ejector groups are arranged along the outer contour line of the outer cavity. In this embodiment, the number of outer ejector groups is preferably four. The four groups of outer ejector groups can stably eject the outer structure 101 formed in the outer cavity when the mold is opened.

[0040] Combination Figure 4 and Figure 7 The second ejection mechanism includes an upper ejector plate 8, an inner ejector rod 9 and an ejector pin 10, wherein the upper ejector plate 8 is slidably matched with the movable mold 2, the top end of the inner ejector rod 9 is fixedly connected to the upper ejector plate 8 by screws, and the ejector pin 10 is fixedly connected to the top surface of the upper ejector plate 8 by screws. In this embodiment, there are multiple ejector pins 10, which are evenly distributed on the lower side of the inner cavity in an arranged manner. When the movable mold 2 and the fixed mold are closed, the top end of the ejector pin 10 contacts the bottom surface of the inner cavity. In order to make the upper ejector plate 8 slide more accurately and stably relative to the movable mold 2, combined with Figure 5 In this embodiment, a sliding cavity 201 is opened on the bottom surface of the movable mold 2, and a fixed plate 11 for sealing the bottom opening of the sliding cavity 201 is fixedly connected to the bottom surface of the movable mold 2 by screws. The fixed plate 11 and the sliding cavity 201 together form a sliding space in a sealed state in which the upper ejector plate 8 slides relative to the movable mold 2; at the same time, a guide column 12 is fixedly connected to the top surface of the fixed plate 11 by screws, and a guide hole that slidably cooperates with the guide column 12 is opened on the upper ejector plate 8. The guide column 12 is used to provide guidance for the vertical sliding of the upper ejector plate 8, so that the upper ejector plate 8 can slide more smoothly and accurately.

[0041] Combination Figure 3 and Figure 4 In this embodiment, the second lower ejector plate 13 is also included. The second lower ejector plate 13 is located below the first lower ejector plate 4. When the movable mold 2 and the fixed mold are closed, the second lower ejector plate 13 and the first lower ejector plate 4 are in contact with each other, and the bottom end of the inner ejector rod 9 is fixedly connected to the second lower ejector plate 13 by a screw.

[0042] The specific implementation process is as follows:

[0043] When the movable mold 2 and the fixed mold are in the mold-closing state, the movable mold 2, the fixed mold and the movable seat 3 together form an inner cavity and an outer cavity, so that the inner structure 102 and the outer structure 101 in the speaker mesh structure 1 can be easily molded. When the mold is opened after the molding is completed, the lower ejector plate 2 13 is first driven upward by external power. While the lower ejector plate 2 13 pushes the inner ejector rod 9 to move upward, the lower ejector plate 2 13 also synchronously pushes the lower ejector plate 1 4 to move upward, so that the lower ejector plate 1 4 pushes the outer ejector rod 5 to move upward. At this time, the inner ejector rod 9 pushes the upper ejector plate 8 to move upward, so that the upper ejector plate 8 drives the ejector 10 to eject the inner structure 102. At the same time, the ejector block 6 ejects the outer structure 101 under the push of the outer ejector rod 5, ensuring that the inner structure 102 and the outer structure 101 are ejected synchronously.

[0044] When the upper ejector plate 8 moves upward to the top wall of the sliding cavity 201, the upper ejector plate 8 cannot continue to move upward. At this time, the inner structure 102 and the outer structure 101 are both ejected, and the ejection distance of the ejector 10 is controlled to be 40-50mm, and the preferred embodiment is 40mm; then, the external power is used to continue to drive the lower ejector plate 4 to move upward, while the lower ejector plate 2 13, the inner ejector rod 9, the upper ejector plate 8 and the ejector 10 all keep their positions unchanged. At this time, the lower ejector plate 4 pushes the outer ejector rod 5 and the ejector block 6 to continue to move upward. Under the ejection action of the ejector block 6, the entire speaker mesh structure 1 continues to move upward and away from the movable mold 2, which is convenient for removing the product after demolding.

[0045] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An ejection mechanism for automobile door panel injection molding, comprising a movable mold and a fixed mold, wherein the movable mold and the fixed mold enclose an outer cavity and an inner cavity for molding a speaker mesh structure, characterized in that: The movable mold is slidably connected with a first ejection mechanism and a second ejection mechanism. When the movable mold and the fixed mold are in a mold-clamping state, the first ejection mechanism contacts the outer cavity, the second ejection mechanism contacts the inner cavity, and the ejection distance of the first ejection mechanism is greater than the ejection distance of the second ejection mechanism.

2. The ejection mechanism for automobile door panel injection molding according to claim 1, characterized in that: The second ejection mechanism comprises an upper ejector plate, an inner ejector rod and an ejector pin. The upper ejector plate is slidably matched with the movable mold, and the ejector pin is fixedly connected to the upper ejector plate.

3. The ejection mechanism for automobile door panel injection molding according to claim 2, characterized in that: There are multiple ejector pins, which are evenly arranged on one side of the inner cavity.

4. The ejection mechanism for automobile door panel injection molding according to claim 3, characterized in that: The movable mold is provided with a sliding cavity, and a fixed plate for sealing the opening of the sliding cavity is fixedly connected to the movable mold. The fixed plate and the sliding cavity enclose a sliding space for the upper ejector plate to slide relative to the fixed mold.

5. The ejection mechanism for automobile door panel injection molding according to claim 4, characterized in that: The fixing plate is fixedly connected with a guide column, and the upper ejector plate is slidably matched with the guide column.

6. The ejection mechanism for automobile door panel injection molding according to claim 4, characterized in that: The first ejection mechanism comprises a lower ejector plate 1, an outer ejector rod and an ejector block, wherein the outer ejector rod is fixedly connected between the lower ejector plate 1 and the ejector block, and the ejector block is slidably matched with the movable mold.

7. The ejection mechanism for automobile door panel injection molding according to claim 6, characterized in that: The ejector block and the outer ejector rod form a group of outer ejector groups, the number of the outer ejector groups is multiple, and the multiple groups of outer ejector groups are arranged along the outer contour line of the outer cavity.

8. The ejection mechanism for automobile door panel injection molding according to claim 7, characterized in that: An outer sleeve is fixedly connected to the movable mold, and the outer ejector rod is slidably matched with the outer sleeve.

9. The ejection mechanism for automobile door panel injection molding according to claim 6, characterized in that: It also includes a lower ejector plate 2, wherein the lower ejector plate 1 is located between the lower ejector plate 2 and the fixed plate, and the inner ejector rod is fixedly connected between the lower ejector plate 2 and the upper ejector plate.

10. An ejection mechanism for automobile door panel injection molding according to any one of claims 1 to 9, characterized in that: The movable mold is provided with a mounting groove, a movable seat is fixedly connected in the mounting groove, and the movable seat and the fixed mold form the inner cavity.

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