Die for forming speed change oil pan main body

Abstract

The utility model relates to the technical field of variable-speed oil pan production, in particular to a die for forming a variable-speed oil pan body, which comprises a lower die, a lower die core, an upper die core and an upper die which are sequentially arranged from bottom to top, the upper die core and the lower die core are buckled to form a forming cavity, an ejector pin mechanism is arranged on the lower die, an inclined guide slot hole is arranged on the lower die core, and the inclined guide slot hole is communicated with the ejector pin mechanism. A forming block is movably inserted into the inclined guide groove hole, the outward side of the forming block forms part of the side wall of the forming cavity, the bottom of the forming block movably penetrates through the lower mold core through an inclined guide column and is in sliding connection with the action end of the ejector pin mechanism, and the forming block and the inclined guide column can synchronously slide relative to the lower mold core in the guide direction of the inclined guide column; the forming block is provided with an extending edge, the extending edge can cover the lower mold core, a forming connecting cavity is formed by the extending edge and the corresponding side face of the lower mold core, and the forming connecting cavity communicates with the forming cavity. The mold for forming the variable-speed oil pan main body is simple in structure and convenient to demold.

Description

Technical Field

[0001] This utility model relates to the field of transmission oil pan production technology, specifically to a mold for forming the main body of the transmission oil pan. Background Technology

[0002] Currently, transmission oil pans are generally divided into two parts: the oil pan body and the filter cover. The filter cover is attached to the oil pan body, as illustrated by patent CN203717868U - an oil filter device for an automatic transmission. This type of oil pan is currently manufactured using a split-piece molding method, which facilitates production.

[0003] In actual installation, the filter cover is fastened to the oil pan body, which has an oil inlet groove. The corresponding area of ​​the filter cover is also fastened to the corresponding area of ​​the oil inlet groove. This allows external transmission lubricating oil to pass through the oil inlet of the filter cover and the oil inlet groove into the space between the oil pan body and the filter cover. If the width of the oil inlet groove is too large, it can easily reduce the strength of the oil pan body in this area. If the width of the oil inlet groove is too small, impurities carried by the transmission lubricating oil can easily accumulate in this area after entering through the oil inlet of the filter cover, causing the width of the oil inlet groove to become smaller and smaller, ultimately affecting the normal filtration effect. Therefore, it is common practice in current production to set a connecting bridge at the top of the oil inlet groove to support the two side walls of the oil inlet groove, thereby ensuring the strength of the oil pan body in this area. However, setting a connecting bridge will make the oil inlet groove form an oil inlet groove hole structure, which is similar to a snap-fit ​​structure. This is not conducive to the subsequent demolding work during the injection molding of the oil pan body. Utility Model Content

[0004] In order to overcome one of the shortcomings of the prior art, the purpose of this utility model is to provide a mold for molding the main body of the transmission oil pan. The mold for molding the main body of the transmission oil pan has a simple structure and is easy to demold.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A mold for molding the main body of a transmission oil pan includes a lower mold, a lower mold core, an upper mold core, and an upper mold arranged sequentially from bottom to top. The upper mold core and the lower mold core are engaged to form a molding cavity. The lower mold is provided with an ejector pin mechanism. The lower mold core is provided with an inclined guide groove. A molding block is movably inserted into the inclined guide groove. The outward side of the molding block forms part of the sidewall of the molding cavity. The bottom of the molding block passes through the lower mold core via an inclined guide post and is slidably connected to the actuating end of the ejector pin mechanism. The molding block and the inclined guide post can slide synchronously relative to the lower mold core along the guiding direction of the inclined guide post. The molding block is provided with an extension edge, which is located on the side of the molding block opposite to the spatial component of the inclined guide groove in the horizontal plane. The extension edge can cover the lower mold core and form a molding connecting cavity with the corresponding side of the lower mold core. The molding connecting cavity communicates with the molding cavity.

[0007] Furthermore, the lower mold core is provided with a forming step on one side end face corresponding to the inclined guide slot hole, the protruding edge covers the forming step, and the forming cavity is formed between the lower side of the protruding edge and the bottom surface of the forming step.

[0008] Furthermore, the bottom of the lower mold core is provided with an installation groove, and a limiting block is installed in the installation groove. The lower end of the inclined guide post moves through the sliding hole of the limiting block.

[0009] Furthermore, a sliding block is provided at the bottom of the inclined guide post, and a limiting guide block for limiting the sliding block is provided on the ejector mechanism.

[0010] Furthermore, the sidewall of the inclined guide slot has an inclined guide surface, which is parallel to the guiding direction of the inclined guide post, and the forming block is slidably mounted on the inclined guide surface.

[0011] Furthermore, the ejector mechanism includes an ejector plate slidably installed in the lower mold and a plurality of ejector pins, all of which are capable of moving through the lower mold core.

[0012] Furthermore, the ejector plate is provided with several lifting columns, all of which movably pass through the lower mold core and abut against the end face of the upper mold core. A return spring is fitted on each lifting column, and the two ends of the return spring abut against the lower mold core and the ejector plate, respectively. The ejector plate is provided with a clearance groove, and the lower end of the inclined guide column is adapted to the clearance groove and can abut against the bottom of the clearance groove. When the ejector plate gradually pushes all the ejector pins to lift the molded product on the lower mold core, the lower end of the inclined guide column abuts against the bottom of the clearance groove and is lifted by the ejector plate.

[0013] Furthermore, the ejector plate consists of two overlapping pieces, with one end of each ejector pin movably passing through the upper ejector plate and abutting against the lower ejector plate. The clearance groove is disposed through the upper ejector plate, and the lower end of the inclined guide post can movably pass through the clearance groove and abut against the lower ejector plate. The corresponding end of the return spring abuts against the upper ejector plate.

[0014] Furthermore, the lower mold is provided with a B plate, the B plate is provided with a forming groove, the lower mold core is installed in the forming groove, the forming groove is provided with a snap-fit ​​position on the periphery of the lower mold core, and the upper mold core is provided with a snap-fit ​​boss that cooperates with the snap-fit ​​position.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention relates to a mold for molding the main body of a transmission oil pan. The lower mold core is improved based on existing molds, so that the lower mold core and the molding block together form the lower side of the molding cavity. This facilitates the molding of complex curved surface structures of the oil pan and also facilitates the machining and subsequent replacement of the lower mold core. An inclined guide slot is used to accommodate and guide the movement of the molding block. An extension edge is provided on the molding block, and the side of the extension edge corresponding to the lower mold core forms a molding connecting cavity. This facilitates the molding of the connecting bridge on the oil pan. Simultaneously, the molding block can slide relative to the lower mold core, which is beneficial for ejecting the molding block during the later mold opening process. When the ejector mechanism ejects the molded product from the lower mold core, the extension edge can disengage from the lower mold core, facilitating the demolding of the connecting bridge.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0021] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] Explanation of icon numbers:

[0023] Lower mold 10, B plate 11, forming groove 12, snap-fit ​​position 13, lower mold core 20, inclined guide groove hole 21, forming block 22, inclined guide post 23, protruding edge 24, forming cavity 25, forming step 26, mounting groove 27, limiting block 28, sliding block 29, inclined guide surface 2a, upper mold core 30, snap-fit ​​boss 31, upper mold 40, forming cavity 50, ejector mechanism 60, limiting guide block 61, ejector plate 62, ejector pin 63, clearance groove 64, lifting post 65, return spring 66. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Reference Figures 1 to 4 The mold shown is for molding the main body of a transmission oil pan, including a lower mold 10, a lower mold core 20, an upper mold core 30, and an upper mold 40 arranged sequentially from bottom to top. The upper mold core 30 and the lower mold core 20 are engaged to form a molding cavity 50. The lower mold 10 is provided with an ejector pin mechanism 60. The lower mold core 20 is provided with an inclined guide slot 21. A molding block 22 is movably inserted into the inclined guide slot 21. The outward side of the molding block 22 forms part of the sidewall of the molding cavity 50. The bottom of the molding block 22 moves through the lower mold core via an inclined guide post 23. 20 is slidably connected to the moving end of the ejector mechanism 60. The molding block 22 and the inclined guide post 23 can slide synchronously relative to the lower mold core 20 along the guiding direction of the inclined guide post 23. The molding block 22 is provided with an extension edge 24. The extension edge 24 is provided on the side of the molding block 22 facing away from the inclined guide slot hole 21 on the horizontal plane. The extension edge 24 can cover the lower mold core 20 and form a molding cavity 25 with the side corresponding to the lower mold core 20. The molding cavity 25 is connected to the molding cavity 50.

[0026] Specifically, in the above embodiments, the ejector mechanism 60 is used for mold opening and ejecting the molded product from the lower mold core 20. The mold consisting of the ejector mechanism 60, lower mold 10, lower mold core 20, upper mold core 30, and upper mold 40 is configured the same as a conventional mold, which will not be detailed here. It should be noted that in this application, after the molding block 22 is fully in place, its top and the lower mold core 20 together form the bottom surface of the molding cavity 50. The width of the molding block 22 is the same as the length of the connecting bridge, and the molding block 22 is used to mold the oil inlet groove of the gearbox oil pan. The protruding edge 24 in this application is actually the part that molds the oil inlet groove hole. After the mold is opened, the upper mold core 30 and the upper mold 40 are first lifted. After they move to the appropriate position, the ejector mechanism 60 begins to lift the structure formed by the inclined guide post 23 and the molding block 22, so that it is disengaged relative to the lower mold core 20. At this time, the part formed in the molding cavity 25 will not be restricted by the protruding edge 24, so it can be ejected along with the entire product.

[0027] In this application, to facilitate installation and subsequent processing, a B plate 11 is provided on the lower mold 10, and a forming groove 12 is provided on the B plate 11. The lower mold core 20 is installed in the forming groove 12, and a snap-fit ​​position 13 is provided on the periphery of the forming groove 12. The upper mold core 30 is provided with a snap-fit ​​boss 31 that mates with the snap-fit ​​position 13. This structural arrangement allows the entire lower mold core 20 to be completely placed within the B plate 11, which is beneficial for subsequent forming.

[0028] The mold used for molding the main body of the transmission oil pan has an improved lower mold core 20 based on the existing mold. The lower mold core 20 and the molding block 22 together form the lower side of the molding cavity 50. This is beneficial for molding the complex curved surface structure of the oil pan, and also facilitates the machining and subsequent replacement of the lower mold core 20. The inclined guide slot 21 is used to accommodate and guide the movement of the molding block 22. An extension edge 24 is provided on the molding block 22. The side of the extension edge 24 corresponding to the lower mold core 20 forms a molding connecting cavity 25. This facilitates the molding of the connecting bridge on the oil pan. At the same time, the molding block 22 can slide relative to the lower mold core 20. This is beneficial for ejecting the molding block 22 during the later mold opening process. When the ejector mechanism 60 ejects the molded product from the lower mold core 20, the extension edge 24 can disengage from the lower mold core 20, which is beneficial for the demolding of the connecting bridge.

[0029] See Figures 1 to 4In one embodiment of this application, for better fit, a forming step 26 is provided on the side end face of the lower mold core 20 corresponding to the inclined guide slot 21. The protruding edge 24 covers the forming step 26, and the forming cavity 25 is formed between the lower side of the protruding edge 24 and the bottom surface of the forming step 26. In fact, the forming step 26 is mainly to fit the end face of the protruding edge 24, so that the lower side of the entire forming cavity 50 is flat.

[0030] In the above embodiment, to facilitate better sliding of the molding block 22, the sidewall of the inclined guide slot 21 has an inclined guide surface 2a, which is parallel to the guiding direction of the inclined guide post 23. The molding block 22 is slidably mounted on the inclined guide surface 2a. Specifically, when the ejector mechanism 60 lifts the inclined guide post 23, the molding block 22 slides along the inclined guide surface 2a. At this time, the protruding edge 24 disengages from the molding step 26, facilitating the demolding and ejection of the already formed connecting bridge.

[0031] See Figure 2 and Figure 3 In one embodiment of this application, in order to better drive the inclined guide post 23 to slide along its own length direction, while avoiding wear of the lower mold core 20 by the inclined guide post 23, a mounting groove 27 is provided at the bottom of the lower mold core 20. A limiting block 28 is installed in the mounting groove 27, and the lower end of the inclined guide post 23 moves through the sliding hole of the limiting block 28. This structural arrangement facilitates the replacement of the worn limiting block 28 in the future. In fact, the mounting groove 27 is provided on plate B 11.

[0032] Furthermore, to further restrict the movement between the inclined guide post 23 and the ejector mechanism 60, a sliding block 29 is provided at the bottom of the inclined guide post 23, and a limiting guide block 61 for limiting the sliding block 29 is provided on the ejector mechanism 60. In fact, there are two limiting guide blocks 61, which form a guide groove between them, and the sliding block 29 is slidably installed in the guide groove.

[0033] See Figure 3 In one embodiment of this application, in order to better eject the molded product from the lower mold core 20, the ejector mechanism 60 includes an ejector plate 62 slidably mounted within the lower mold 10 and a plurality of ejector pins 63, all of which can move through the lower mold core 20. In practice, the structures of the ejector pins 63 and the ejector plate 62 are conventionally configured and will not be described in detail here.

[0034] Furthermore, in the above embodiments, the opening of the upper mold 40 and the upper mold core 30 requires the use of other action mechanisms, such as an externally mounted mold-opening cylinder. However, in one embodiment of this application, in order to simultaneously eject the formed product during the mold opening process, the ejector plate 62 is provided with several lifting columns 65. All the lifting columns 65 move through the lower mold core 20 and abut against the end face of the upper mold core 30. A return spring 66 is fitted on the lifting column 65, and the two ends of the return spring 66 abut against the lower mold core 20 and the ejector plate 62, respectively. The ejector plate 62 is provided with a clearance groove 64. The lower end of the inclined guide column 23 is adapted to the clearance groove 64 and can abut against the bottom of the clearance groove 64. When the ejector plate 62 gradually pushes all the ejector pins 63 to lift the formed product on the lower mold core 20, the lower end of the inclined guide column 23 abuts against the bottom of the clearance groove 64 and is lifted by the ejector plate 62. The purpose of the clearance groove 64 is to prevent the ejector plate 62 from lifting the upper mold 40 and upper mold core 30 first during the mold opening operation. Only after the mold is properly opened will the inclined guide post 23 be lifted, at which point the protruding edge 24 disengages from the forming step 26, facilitating the demolding and ejection of the already formed connecting bridge. In this embodiment, the length of the ejector pin 63 in the lifting direction is less than the length of the inclined guide post 23 in that direction. This allows the connecting bridge to disengage first, and then be lifted along with the entire oil pan body from the lower mold core 20. In fact, the upper end of the return spring 66 actually abuts against the lower end of the B plate 11.

[0035] Of course, to facilitate subsequent processing and ensure that the ejector plate 62 can drive all ejector pins 63 to move, two ejector plates 62 are provided and overlap each other. One end of each ejector pin 63 moves through the upper ejector plate 62 and abuts against the lower ejector plate 62. The clearance groove 64 is provided through the upper ejector plate 62. The lower end of the inclined guide post 23 can move through the clearance groove 64 and abut against the lower ejector plate 62. The corresponding end of the return spring 66 abuts against the upper ejector plate 62. The ejector pin 63 can be directly fixed to the lower ejector plate 62, or a clamp can be provided at the lower end of the ejector pin 63. The two ejector plates 62 are used to clamp the clamp. In this way, during the mold closing process, when the return spring 66 resets and pushes the upper ejector plate 62 to reset, the two ejector plates 62 can push and pull all the ejector pins 63 to reset together. Similarly, in this application, the limiting guide block 61 is installed on the ejector plate 62. When the ejector plate 62 is reset, the limiting guide block 61 will also drive the structure composed of the sliding block 29, the inclined guide post 23 and the molding block 22 to be reset together.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A mold for molding the main body of a transmission oil pan, comprising a lower mold, a lower mold core, an upper mold core, and an upper mold arranged sequentially from bottom to top, wherein the upper mold core and the lower mold core are engaged to form a molding cavity, and an ejector pin mechanism is provided on the lower mold, characterized in that, The lower mold core is provided with an inclined guide groove, and a molding block is movably inserted into the inclined guide groove. The outward side of the molding block forms part of the sidewall of the molding cavity. The bottom of the molding block passes through the lower mold core through an inclined guide post and is slidably connected to the moving end of the ejector mechanism. The molding block and the inclined guide post can slide synchronously relative to the lower mold core along the guiding direction of the inclined guide post. The molding block is provided with an extension edge, which is located on the side of the molding block opposite to the spatial component of the inclined guide groove on the horizontal plane. The extension edge can cover the lower mold core and form a molding connecting cavity with the side of the lower mold core corresponding to the lower mold core. The molding connecting cavity is connected to the molding cavity.

2. The mold for molding the main body of a transmission oil pan according to claim 1, characterized in that: The lower mold core is provided with a forming step on one side end face corresponding to the inclined guide slot hole. The protruding edge covers the forming step, and the forming cavity is formed between the lower side of the protruding edge and the bottom surface of the forming step.

3. The mold for molding the main body of a transmission oil pan according to claim 1, characterized in that: The bottom of the lower mold core is provided with an installation groove, and a limiting block is installed in the installation groove. The lower end of the inclined guide post moves through the sliding hole of the limiting block.

4. The mold for molding the main body of a transmission oil pan according to claim 1, characterized in that: A sliding block is provided at the bottom of the inclined guide post, and a limiting guide block is provided on the ejector mechanism to limit the sliding block.

5. A mold for molding the main body of a transmission oil pan according to claim 1, characterized in that: The oblique guide slot has an oblique guide surface on its side wall. The oblique guide surface is parallel to the guiding direction of the oblique guide post. The forming block is slidably mounted on the oblique guide surface.

6. A mold for molding the main body of a transmission oil pan according to any one of claims 1-5, characterized in that: The ejector mechanism includes an ejector plate slidably installed in the lower mold and a plurality of ejector pins, all of which are capable of moving through the lower mold core.

7. A mold for molding the main body of a transmission oil pan according to claim 6, characterized in that: The ejector plate is provided with several lifting columns, all of which move through the lower mold core and abut against the end face of the upper mold core. A return spring is fitted on each lifting column, and the two ends of the return spring abut against the lower mold core and the ejector plate, respectively. The ejector plate is provided with a clearance groove, and the lower end of the inclined guide column is adapted to the clearance groove and can abut against the bottom of the clearance groove. When the ejector plate gradually pushes all the ejector pins to lift the molded product on the lower mold core, the lower end of the inclined guide column abuts against the bottom of the clearance groove and is lifted by the ejector plate.

8. A mold for molding the main body of a transmission oil pan according to claim 7, characterized in that: The ejector plate consists of two overlapping pieces. One end of each ejector pin moves through the upper ejector plate and abuts against the lower ejector plate. The clearance groove is provided through the upper ejector plate. The lower end of the inclined guide post can move through the clearance groove and abut against the lower ejector plate. The corresponding end of the return spring abuts against the upper ejector plate.

9. A mold for molding the main body of a transmission oil pan according to any one of claims 1-5, characterized in that: The lower mold is provided with a B plate, and the B plate is provided with a forming groove. The lower mold core is installed in the forming groove. The forming groove is provided with a snap-fit ​​position on the periphery of the lower mold core. The upper mold core is provided with a snap-fit ​​boss that cooperates with the snap-fit ​​position.

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