Mold ejection mechanism and mold

Abstract

The invention provides a mold ejection mechanism and a mold. The mold ejection mechanism comprises a transmission assembly arranged on a lower mold of the mold, a first sliding block arranged on one side of the transmission assembly, and a second sliding block and an ejection block which are sequentially stacked on the top of the transmission assembly; a cavity is defined by the transmission assembly, the first sliding block, the second sliding block, the ejector block and an upper die body of the die and used for forming the inverted buckle. The transmission assembly is driven to be far away from the formed inverted buckle, and the first sliding block is connected with the upper die through a first guide part and can be far away from the inverted buckle along with rising of the upper die. The ejection block is arranged on an ejection piece in the lower die, a second guide part is arranged between the ejection piece and the second sliding block, when the ejection piece drives the ejection block to slide in the preset direction, the ejection block can eject the inverted buckle, and the second sliding block can be away from the inverted buckle. According to the mold ejection mechanism, the second sliding block can be driven to move backwards in a linkage mode to avoid an inverted buckle when a product is ejected out, ejection of the product is facilitated, a driving structure can be saved, and automatic part taking of a mechanical arm is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding equipment, in particular to a mold ejection mechanism. The invention also relates to a mold provided with the mold ejection mechanism. Background Art

[0002] At present, the left and right trim panels of the car tailgate and other parts have a relatively compact product shape, resulting in insufficient design space for the injection mold. Therefore, in order to facilitate the demolding of the injection mold, the product shape will be designed to be relatively traditional to avoid large-area undercuts. Moreover, in the prior art, a tunnel-type inclined slider is generally used to demold the undercut parts of the product. First, the mold is separated from the movable and fixed molds by the mold opening action of the injection molding machine, and the slider is pulled apart by the inclined guide column of the fixed mold. Then, the inclined slider is pulled away from the undercut contour line of the product by more than 2 mm through the oil cylinder, and then the ejection mechanism of the mold pushes the ejector block to eject the product upward.

[0003] However, due to the small product space, interference occurs when the product is ejected and the product cannot be ejected normally, making it impossible for the current mold to achieve large undercut product modeling. In addition, it is also impossible to achieve automatic grasping by the robot, and it can only be done by manual removal, resulting in the existing mold only being able to produce product modeling with a small amount of undercut. Summary of the invention

[0004] In view of this, the present invention aims to provide a mold ejection mechanism to facilitate ejection of products with undercuts, thereby facilitating the mold to achieve large undercut product shaping.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A mold ejection mechanism, used for ejecting a product with an undercut, the mold ejection mechanism comprising a transmission assembly arranged on a lower mold of the mold, a first slider arranged on one side of the transmission assembly, and a second slider and an ejector block stacked on top of the transmission assembly in sequence, and a cavity is formed between the transmission assembly, the first slider, the second slider, the ejector block and the upper mold of the mold, and the cavity is used to form the undercut;

[0007] The transmission assembly is driven to move away from the formed undercut, the first slider is connected to the upper die through a first guide portion, and the first slider is guided by the first guide portion to move away from the undercut as the upper die rises;

[0008] The ejector block is arranged on the ejector member in the lower mold, and a second guide portion is provided between the ejector member and the second sliding block. When the ejector member drives the ejector block to slide along a preset direction, the ejector block can lift the undercut, and the second sliding block can move away from the undercut under the guidance of the second guide portion.

[0009] Furthermore, when the ejector member drives the ejector block to slide along the preset direction, after the undercut is lifted to a preset height, the second slide block moves away from the undercut under the guidance of the second guide portion.

[0010] Furthermore, a groove with a top opening is provided on the top of the second sliding block, and the top block is embedded in the groove.

[0011] Further, the ejector comprises an ejector plate, and an ejector pin and an ejector rod arranged on the ejector plate, the ejector plate is used to be connected to an external driving part, the ejector pin and the ejector rod are slidably arranged on the lower mold along the up-down direction, and the ejector block is arranged on the ejector pin;

[0012] The second guide portion includes a second guide groove provided on the push rod and a second guide column provided on the second sliding block, and the second guide column is inserted in the second guide groove.

[0013] Furthermore, the second guide groove includes a first straight line segment and a second straight line segment which are arranged at intervals in the up-down direction, and an oblique line segment which is arranged between the first straight line segment and the second straight line segment and which is arranged at an angle to the first straight line segment and the second straight line segment;

[0014] The second straight line segment is arranged on a side of the first straight line segment away from the cavity.

[0015] Further, the first guide portion includes a first guide column provided on the upper mold, and a first guide groove provided on the first sliding block;

[0016] From the top to the bottom, the first guide column is inclined to the side away from the cavity and inserted into the first guide groove.

[0017] Furthermore, under the guidance of the first guide portion, the first sliding block moves away from the undercut in an oblique upward direction.

[0018] Furthermore, the transmission assembly includes a transmission block slidably arranged on the lower mold along a horizontal direction, and an inclined sliding block abutting against the transmission block through an inclined surface;

[0019] The cavity is formed between the inclined sliding block, the first sliding block, the second sliding block, the top block and the upper die of the mold.

[0020] Furthermore, a third guide portion is provided between the transmission block and the inclined sliding block, and the third guide portion is used to guide the inclined sliding block to slide relative to the transmission block.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The mold ejection mechanism described in the present invention can keep the transmission assembly and the first slider away from the undercut by arranging the transmission assembly, the first slider, the second slider, and the ejector block, and the arrangement of the second guide portion can realize the linkage action between the second slider and the ejector block, which can not only drive the second slider to move backward in linkage to avoid the undercut when ejecting the product, thereby facilitating product ejection, but also save the driving structure, simplify the mold, improve the production rhythm, and also facilitate the realization of automatic part removal by the robot.

[0023] In addition, when the ejector drives the ejector block to slide along a preset direction, after the undercut is lifted to a preset height, the second slider moves away from the undercut under the guidance of the second guide portion, which can prevent the ejector block from blocking the second slider and facilitate the second slider to move away from the undercut. By providing a groove with a top opening on the top of the second slider and embedding the ejector block in the groove, the stability of the cooperation between the ejector block and the second slider can be improved, which is beneficial to maintaining the stability of the cavity. The ejector includes an ejector plate, and an ejector pin and an ejector rod provided on the ejector plate, which not only facilitates the ejector plate to be connected to the external driving part through the ejector plate, but also facilitates the provision of a second guide portion between the ejector and the second slider, and the second guide portion adopts a second guide groove and a second guide column, which has a simple structure and is easy to design and implement.

[0024] Secondly, the second guide groove includes a first straight line segment and a second straight line segment arranged at intervals in the up-down direction, and an oblique line segment arranged between the two and arranged at an angle to the two, so as to realize that the undercut is lifted to a preset height, and the structure is simple and easy to design and implement. The first guide portion includes a first guide column arranged on the upper mold, and a first guide groove arranged on the first slider, and the structure is simple and easy to process and manufacture. Under the guidance of the first guide portion, the first slider moves away from the undercut in an oblique upward direction, which can make the first slider quickly move away from the undercut and effectively prevent interference with the undercut.

[0025] In addition, the transmission assembly includes a transmission block that slides on the lower mold in a horizontal direction, and an inclined sliding block that abuts the transmission block through an inclined surface, so that the inclined sliding block can slide obliquely downward under the guidance of the inclined surface, thereby quickly moving away from the undercut and effectively preventing interference with the undercut. By providing a third guide portion between the transmission block and the inclined sliding block, the sliding smoothness of the inclined sliding block can be improved.

[0026] Another object of the present invention is to provide a mold for preparing a product with an undercut, the mold comprising the mold ejection mechanism as described above, and a first driving part for driving the transmission assembly to move, and a second driving part for driving the ejection member to slide along the preset direction.

[0027] The mold described in the present invention, by providing the mold ejection mechanism as described above, is not only convenient for ejecting products with undercuts and enabling automatic part removal by a robot, but also capable of preparing products with large undercuts, thereby achieving better use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of the mold according to an embodiment of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the mold according to an embodiment of the present invention from another viewing angle;

[0031] Figure 3 is a schematic structural diagram of the mold according to an embodiment of the present invention at another viewing angle;

[0032] Figure 4 A cross-sectional view of a mold according to an embodiment of the present invention;

[0033] Figure 5 It is a partial structural schematic diagram of a mold according to an embodiment of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the mold ejection mechanism according to an embodiment of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the mold ejection mechanism according to an embodiment of the present invention from another viewing angle;

[0036] Figure 8 It is a partial structural schematic diagram of the mold ejection mechanism according to an embodiment of the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the first sliding block according to an embodiment of the present invention;

[0038] Fig.10 is a schematic structural diagram of a second sliding block according to an embodiment of the present invention;

[0039] Fig.11 It is a schematic structural diagram of a top block according to an embodiment of the present invention;

[0040] Fig.12 It is a structural schematic diagram of a transmission assembly according to an embodiment of the present invention;

[0041] Fig.13 It is a structural schematic diagram of a transmission block according to an embodiment of the present invention;

[0042] Fig.14 It is a structural schematic diagram of the inclined sliding block according to an embodiment of the present invention;

[0043] Fig.15It is a state diagram of the mold according to an embodiment of the present invention when the upper mold is in a rising state;

[0044] Fig.16 This is a state diagram of the mold according to an embodiment of the present invention when the first slider is away from the undercut;

[0045] Fig.17 This is a state diagram of the mold according to an embodiment of the present invention when the first slider and the transmission assembly are away from the undercut;

[0046] Fig.18 This is a state diagram of the mold according to an embodiment of the present invention when ejecting an undercut;

[0047] Description of reference numerals:

[0048] 1. Lower die; 2. Upper die; 3. Upper press plate; 4. Lower press plate; 5. Die foot; 6. First oil cylinder; 7. Mounting seat; 8. Second oil cylinder; 9. Ejector plate; 10. First slide block; 11. First guide column; 12. Transmission block; 13. Oblique slide block; 14. Second slide block; 15. Ejector block; 16. Ejector pin; 17. Ejector rod; 18. Guide block; 19. Second guide column; K. Undercut;

[0049] 1301, third guide groove; 1401, groove;

[0050] 1701, first straight line segment; 1702, oblique line segment; 1703, second straight line segment. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0052] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0053] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0054] In addition, in the description of the present invention, unless otherwise clearly defined, the mating parts may be connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0055] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0056] In view of the problem in the prior art that it is difficult to demould the undercut K portion of the product, so that only products with small undercut K can be produced, and products with large undercut K cannot be produced. This embodiment particularly proposes a novel mold ejection mechanism, which, in terms of overall structure, includes a transmission assembly arranged on the lower mold 1 of the mold, a first slider 10 arranged on one side of the transmission assembly, and a second slider 14 and a top block 15 sequentially stacked on the top of the transmission assembly, and a cavity is formed between the transmission assembly, the first slider 10, the second slider 14, the top block 15 and the upper mold 2 of the mold, and the cavity is used to form the undercut K.

[0057] The transmission assembly is driven to move away from the formed undercut K, the first slider 10 is connected to the upper mold 2 through the first guide portion, and under the guidance of the first guide portion, the first slider 10 can move away from the undercut K as the upper mold 2 rises. The ejector block 15 is provided on the ejector in the lower mold 1, and a second guide portion is provided between the ejector and the second slider 14. When the ejector drives the ejector block 15 to slide in a preset direction, the ejector block 15 can lift the undercut K, and the second slider 14 can move away from the undercut K under the guidance of the second guide portion.

[0058] The mold ejection mechanism of this embodiment can make the transmission assembly and the first slider 10 away from the undercut K by setting the transmission assembly, the first slider 10, the second slider 14, and the ejector block 15, and the setting of the second guide portion can realize the linkage action between the second slider 14 and the ejector block 15, which can not only drive the second slider 14 to move backward in linkage to avoid the undercut K when ejecting the product, thereby facilitating the ejection and removal of the product, but also save the driving structure, simplify the mold, improve the production rhythm, and also facilitate the automatic removal of the robot.

[0059] Based on the above overall introduction, an exemplary structure of the mold ejection mechanism of this embodiment is referred to as follows: Figures 1 to 8 As shown in , for the convenience of description, the ejection mechanism is described here in combination with the overall structure of the mold. Figures 1 to 4As shown in the figure, the mold of this embodiment is the same as the prior art in that it includes an upper press plate 3 for mounting an upper mold 2, a lower press plate 4 provided with a mold foot 5, and a lower mold 1 provided on the mold foot 5. In addition, a cavity is formed between the lower mold 1 and the mold foot 5, and the above-mentioned part of the ejector is provided in the cavity. The other structures of the mold can refer to the prior art, and this embodiment mainly focuses on the ejection mechanism.

[0060] In addition, if Figure 1 and Figure 2 As shown in , the first driving part for driving the action of the transmission assembly and the second driving part for driving the action of the ejector are both arranged on the lower die 1. Moreover, as a preferred embodiment, the first driving part of this embodiment is specifically a first oil cylinder 6, which is installed on the lower die 1 through a mounting seat 7, and the second driving part is a second oil cylinder 8, which is directly installed on the lower die 1. It can be understood that in addition to using oil cylinders, it is also feasible to use other driving parts that can output linear power for the first driving part and the second driving part.

[0061] In addition, as a preferred embodiment, in order to improve the production effect, the transmission assembly, the first slider 10, the second slider 14 and the top block 15 of this embodiment are two relatively arranged parts, so that two symmetrically arranged parts can be produced at the same time. Among them, as a specific embodiment, the mold of this embodiment is used to simultaneously produce the left and right trim panels of the tailgate, which can make the left and right trim panels have a larger undercut angle α, so that they can have better aesthetics and use effect. It should be noted that the cavity shape can also be adjusted accordingly to produce products of other shapes. For example, in addition to producing products with only undercut K, other products with other structures in addition to undercut K can also be produced.

[0062] Specifically, if Figure 4 As shown in the figure, the undercut K is roughly U-shaped with its opening facing obliquely downward, and has a top wall, and upper and lower side walls arranged on both sides of the top wall. Among them, as a specific embodiment, the angle α between the lower side wall of the undercut K of this embodiment and the horizontal direction is 59°, and the upper side wall is roughly parallel to the lower side wall. Of course, during specific implementation, the angle α can be adjusted accordingly according to the requirements of different components. In addition, the structure of the first slider 10 of this embodiment is combined with Figure 4 and Fig. 9 As shown in , the top of the mold has a protrusion which is inserted into the groove 1401 at the bottom of the upper mold 2 to improve its setting stability, thereby ensuring the stability of the cavity.

[0063] Secondly, as a preferred embodiment, the first slider 10 is guided by the first guide portion and moves away from the undercut K in an oblique upward direction. This design allows the first slider 10 to move away from the undercut K in an oblique upward direction under the guidance of the first guide portion, so that the first slider 10 can quickly move away from the undercut K and effectively prevent interference with the undercut K. Based on this, Figure 4 As shown in FIG, the top of the lower mold 1 is provided with a bearing surface inclined upward, and the bottom of the first sliding block 10 abuts against the bearing surface.

[0064] In addition, as a preferred embodiment, the first guide portion of this embodiment includes a first guide column 11 provided on the upper mold 2, and a first guide groove provided on the first slider 10. Moreover, from the top to the bottom, the first guide column 11 is tilted toward the side away from the cavity and inserted into the first guide groove. With such a configuration, when the upper mold 2 rises, the first slider 10 can be pushed by the first guide column 11 to slide obliquely upward along the bearing surface, so that it can quickly move away from the cavity.

[0065] It should be noted that, in addition to making the first slider 10 away from the undercut K in the oblique upward direction, the first slider 10 can also be made away from the undercut K in other directions, such as away from the undercut K in the horizontal right direction, in which case the bearing surface can be set as a horizontal plane. In addition, in addition to providing the first guide column 11 on the upper mold 2 and providing the first guide groove on the first slider 10, the first guide column 11 can also be provided on the first slider 10 and the first guide groove can be provided on the upper mold 2.

[0066] Combination Figure 4 , Figures 6 to 8 As shown in , as a preferred embodiment, the ejector of this embodiment includes an ejector plate 9, and an ejector pin 16 and an ejector rod 17 disposed on the ejector plate 9, the ejector plate 9 is used to be connected to an external driving part, the ejector pin 16 and the ejector rod 17 are slidably disposed on the lower mold 1 along the up and down directions, and the ejector block 15 is disposed on the ejector pin 16. The second guide portion includes a second guide groove disposed on the ejector rod 17, and a second guide column 19 disposed on the second slider 14, and the second guide column 19 is inserted in the second guide groove.

[0067] The ejector of this embodiment includes an ejector plate 9, and an ejector pin 16 and an ejector rod 17 disposed on the ejector plate 9, which not only facilitates the ejector to be connected to an external driving part (i.e., the second oil cylinder 8) through the ejector plate 9, but also facilitates the arrangement of a second guide portion between the ejector and the second slider 14. The second guide portion adopts a second guide groove and a second guide column 19, which has the advantages of simple structure and convenient design and implementation. In addition, in order to further improve the linkage effect of the second slider 14, the second guide portions are two oppositely arranged.

[0068] In addition, as a further implementation, in this embodiment, when the ejector drives the ejector block 15 to slide along a preset direction, after the undercut K is lifted to a preset height, the second slider 14 is guided by the second guide portion to move away from the undercut K. This arrangement can prevent the ejector block 15 from blocking the second slider 14, and facilitate the second slider 14 to move away from the undercut K. As a specific embodiment, the structure of the second slider 14 is as follows: Fig.10 As shown in , the left and right sides in the length direction are respectively provided with protruding connection blocks, and each connection block is respectively provided with a plug hole, which is used to insert the second guide column 19.

[0069] Continue to refer to Figure 4 and Fig.10 As shown in FIG. 1 , as a further embodiment, a groove 1401 with an opening at the top is provided on the top of the second slider 14, and the top block 15 is embedded in the groove 1401. This design can improve the stability of the cooperation between the top block 15 and the second slider 14, which is conducive to maintaining the stability of the cavity. Figure 4 and Fig.10 As shown in , it is arranged in accordance with the groove 1401 of the second slider 14 and has a profile that follows the side surface of the undercut K. In addition, in order to improve the action stability of the product during ejection, as a preferred embodiment, as Fig.10 As shown in FIG, there are two grooves 1401 arranged at intervals, and correspondingly, there are also two top blocks 15. Of course, in addition to being set as two grooves 1401 and top blocks 15 arranged at intervals, the number of the two can also be adjusted accordingly according to design requirements.

[0070] Here, based on the above description, as a preferred embodiment, Figure 4 and Figure 8 As shown in , the second guide groove of this embodiment includes a first straight line segment 1701 and a second straight line segment 1703 arranged at intervals in the up-down direction, and an oblique line segment 1702 arranged between the first straight line segment 1701 and the second straight line segment 1703 at an angle to the first straight line segment 1701. In addition, the second straight line segment 1703 is arranged on a side away from the cavity of the first straight line segment 1701. In this embodiment, this structure is used to realize that the undercut K is lifted to a preset height, and the structure is simple and easy to design and implement.

[0071] In order to prevent the second slider 14 from interfering with the undercut K, the angle β between the oblique line segment 1702 and the first straight line segment 1701 and the second straight line segment 1703 is preferably set to be 5° or more smaller than the above-mentioned angle α. Here, based on the specific angle α of this embodiment being 59°, the angle β of this embodiment is 54°. Of course, when the angle α changes, the angle β can be adaptively adjusted.

[0072] In addition, it should be mentioned that, in addition to making the ejector drive the ejector block 15 to slide along the preset direction, after the undercut K is lifted to the preset height, the second slider 14 is guided by the second guide portion to move away from the undercut K. The ejector block 15 and the second slider 14 can also be made to move synchronously. In this case, the groove 1401 may not be provided on the top of the second slider 14 to prevent the ejector block 15 from blocking the movement of the second slider 14, and the second straight line segment 1703 of the second guide groove also needs to be provided.

[0073] Reference Figure 4 and Fig.12 As shown in , as a preferred embodiment, the transmission assembly of this embodiment includes a transmission block 12 slidingly arranged on the lower mold 1 along the horizontal direction, and an inclined slider 13 abutting against the transmission block 12 through an inclined surface. Among them, the inclined slider 13, the first slider 10, the second slider 14, the top block 15 and the upper mold 2 of the mold form a cavity. The transmission assembly of this embodiment includes a transmission block 12 slidingly arranged on the lower mold 1 along the horizontal direction, and an inclined slider 13 abutting against the transmission block 12 through an inclined surface, which can make the inclined slider 13 slide obliquely downward under the guidance of the inclined surface, so that it can quickly move away from the undercut K, and can effectively prevent interference with the undercut K.

[0074] Among them, Figure 4 As shown in FIG. 1 , as a preferred embodiment, the inclined surface is parallel to the horizontal direction (i.e. Figure 4 The angle between the left and right directions shown in the state is set to be between 35°-40°, and preferably set to 37°, so as to better adapt to the angle of the above-mentioned undercut K, so that the inclined slide block 13 can quickly move away from the undercut K. Among them, the structure of the transmission block 12 is specifically as follows Fig.13 As shown in FIG. 1 , it is roughly rectangular, and one side is formed with a matching surface adapted to the inclined slider 13. The structure of the inclined slider 13 is as shown in FIG. Fig.14 As shown in , it has an adapting surface adapted to the lower side wall of the undercut K, and the above-mentioned inclined surface connected to the transmission block 12.

[0075] In this embodiment, as a further implementation, a third guide portion is provided between the transmission block 12 and the inclined sliding block 13, and the third guide portion is used to guide the inclined sliding block 13 to slide relative to the transmission block 12. The provision of the third guide portion can improve the sliding smoothness of the inclined sliding block 13. Figure 4 , Fig.13 and Fig.14 As shown in , as a preferred implementation, the third guide portion of this embodiment includes a guide block 18 arranged on the transmission block 12 and a third guide groove 1301 arranged on the inclined sliding block 13, and the top of the guide block 18 is inserted into the third guide groove 1301.

[0076] Specifically, if Fig.13In the embodiment, the cross section of the guide block 18 is roughly T-shaped, and the top thereof is protruded relative to the mating surface of the transmission block 12. Fig.14 As shown in , the third guide groove 1301 of this embodiment is a T-shaped groove adapted to the top of the guide block 18. In addition, in order to further improve the sliding smoothness of the inclined sliding block 13, the guide block 18 and the third guide groove 1301 of this embodiment are both arranged at intervals. It can be understood that the number of the guide block 18 and the third guide groove 1301 is not limited to two, and can also be adjusted accordingly according to specific circumstances.

[0077] Here, it should be noted that, in addition to making the transmission assembly include a transmission block 12 and an inclined slider 13 abutted by an inclined surface, it can also include an inclined slider 13. In this case, the first driving part can be directly connected to the inclined slider 13, but this may increase the difficulty of preparing the mold.

[0078] Based on the above description, the following combination Figures 15 to 18 The ejection process of the ejection mechanism of the mold is introduced as shown in the figure. First, Fig.15 As shown in , the upper mold 2 is raised and separated from the lower mold 1 by the mold opening action. At this time, under the guidance of the first guide part, the first slider 10 can be driven to move away from the undercut K in the oblique upward direction along the bearing surface. Then, as shown in FIG. Fig.16 As shown in FIG, the transmission block 12 is driven to slide to the left by the first oil cylinder 6. At this time, the inclined sliding block 13 is guided by the inclined surface and moves away from the undercut K in the oblique downward direction.

[0079] Furthermore, the second oil cylinder 8 drives the ejector plate 9 to drive the ejector pin 16 and the ejector rod 17 to slide in the preset direction, that is, to slide upward. During this process, the ejector block 15 first lifts the undercut K, and the second guide column 19 remains stationary in the first straight segment 1701. When the oblique line segment 1702 slides to cooperate with the second guide column 19, that is, the undercut K is lifted to the preset height, the ejector block 15 creates an escape space for the second slider 14, and the second guide column 19 is pushed by the side wall of the oblique line segment 1702, and drives the second slider 14 to slide to the left until it is more than 5 mm away from the contour line of the undercut K, and then the product can be taken away by the robot.

[0080] The mold ejection mechanism of this embodiment, by adopting the above structure, can make the mold produce products with large undercut K, and facilitate product demolding. At the same time, it can realize the upgrade from the original manual picking up to the automatic picking up by the robot, which greatly improves the safety of the production process, production stability and reduction of production cycle. Moreover, the linkage action of the transmission component and the second slider 14 can be realized through one driving part, which can simplify the mold and reduce the cost.

[0081] In addition, this embodiment also relates to a mold for preparing a product with an undercut K, the mold comprising the above mold ejection mechanism, a first driving part for driving the transmission assembly to move, and a second driving part for driving the ejection part to slide along a preset direction. The first driving part and the second driving part can be other driving parts such as oil cylinders that output linear power.

[0082] The mold of this embodiment, by providing the above-mentioned mold ejection mechanism, is not only convenient for ejecting products with undercut K and enabling automatic part removal by a robot, but also capable of preparing products with large undercut K, thereby achieving better use effect.

[0083] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

[0084] In the description of the present application, "first feature" and "second feature" may include one or more of the features. In the description of the present application, "plurality" means two or more. In the description of the present application, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present application, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

Claims

1. A mold ejection mechanism for ejecting a product with an undercut (K). Features ； The mold ejection mechanism comprises a transmission assembly arranged on a lower mold (1) of the mold, a first slider (10) arranged on one side of the transmission assembly, and a second slider (14) and a top block (15) stacked in sequence on top of the transmission assembly, and a cavity is formed between the transmission assembly, the first slider (10), the second slider (14), the top block (15) and the upper mold (2) of the mold, and the cavity is used to form the undercut (K); The transmission assembly is driven to move away from the formed undercut (K), the first slider (10) is connected to the upper die (2) via a first guide portion, and the first slider (10) is guided by the first guide portion to move away from the undercut (K) as the upper die (2) rises; The ejector block (15) is arranged on an ejector member in the lower mold (1), and a second guide portion is provided between the ejector member and the second sliding block (14); when the ejector member drives the ejector block (15) to slide along a preset direction, the ejector block (15) can lift the undercut (K), and the second sliding block (14) can move away from the undercut (K) under the guidance of the second guide portion.

2. The mold ejection mechanism according to claim 1, Features: When the ejector member drives the ejector block (15) to slide along the preset direction, after the undercut (K) is lifted to a preset height, the second slide block (14) moves away from the undercut (K) under the guidance of the second guide portion.

3. The mold ejection mechanism according to claim 2, Features: A groove (1401) with a top opening is provided on the top of the second sliding block (14), and the top block (15) is embedded in the groove (1401).

4. The mold ejection mechanism according to claim 1, Features: The ejector member comprises an ejector plate (9), and an ejector pin (16) and an ejector rod (17) arranged on the ejector plate (9); the ejector plate (9) is used to be connected to an external driving part; the ejector pin (16) and the ejector rod (17) are slidably arranged on the lower mold (1) in an up-down direction; and the ejector block (15) is arranged on the ejector pin (16); The second guide portion comprises a second guide groove provided on the push rod (17), and a second guide column (19) provided on the second sliding block (14), wherein the second guide column (19) is inserted into the second guide groove.

5. The mold ejection mechanism according to claim 4, Features: The second guide groove comprises a first straight line segment (1701), a second straight line segment (1703) arranged at intervals in the up-down direction, and an oblique line segment (1702) arranged between the first straight line segment and the second straight line segment at an angle to the first straight line segment and the second straight line segment; The second straight line segment (1703) is arranged on a side of the first straight line segment (1701) away from the mold cavity.

6. The mold ejection mechanism according to claim 1, Features: The first guide portion comprises a first guide column (11) provided on the upper mold (2), and a first guide groove provided on the first sliding block (10); From the top to the bottom, the first guide column (11) is arranged obliquely toward the side away from the cavity and inserted into the first guide groove.

7. The mold ejection mechanism according to claim 1, Features: Under the guidance of the first guide portion, the first sliding block (10) moves away from the undercut (K) in an oblique upward direction.

8. The mold ejection mechanism according to any one of claims 1 to 7, Features: The transmission assembly comprises a transmission block (12) slidably arranged on the lower mold (1) in a horizontal direction, and an inclined sliding block (13) abutting against the transmission block (12) via an inclined surface; The cavity is formed between the inclined slider (13), the first slider (10), the second slider (14), the top block (15) and the upper die (2) of the die.

9. The mold ejection mechanism according to claim 8, Features: A third guide portion is provided between the transmission block (12) and the inclined sliding block (13), and the third guide portion is used to guide the inclined sliding block (13) to slide relative to the transmission block (12).

10. A mold for preparing a product having an undercut (K), Features: The mold comprises the mold ejection mechanism according to any one of claims 1 to 9, a first driving part for driving the transmission assembly to move, and a second driving part for driving the ejection member to slide along the preset direction.

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