A forming die for an automobile shock absorber component

Abstract

This utility model discloses a molding die for automotive shock absorber parts, comprising a front mold base, a middle mold base, a rear mold base, and an ejection mechanism. The front mold base has a die-casting groove, and the rear mold base has a sizing column with a die-casting part. The middle mold base has an annular stepped surface inside the die-casting hole, and the sizing column fits against the stepped surface. The die-casting part is inserted into the die-casting hole and assembles with the die-casting groove to form a cavity. The ejection mechanism includes an ejection base with an ejector pin in the middle and push rods on both sides. The middle mold base has a sprue channel connecting to the cavity, and the channel has ejector pin holes. The middle mold base has retractable locking blocks on both sides, and the push rods abut against the locking blocks. The guide blocks on both sides of the rear mold base have inclined guide surfaces. When the ejection base moves, the push rods push the locking blocks to separate the middle mold base from the rear mold base, and the locking blocks retract along the guide surfaces to disengage from the push rods. As the base continues to move, the ejector pins pass through the ejector pin holes. This utility model solves the problem of difficult demolding in traditional methods by using a two-stage ejection process: the first push of the middle mold base loosens the product from the sizing column, and the second ejection is performed by the ejector pins.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber component molding technology, and in particular to a molding die for automotive shock absorber components. Background Technology

[0002] In the automotive manufacturing industry, shock absorber components are key parts that ensure vehicle stability, comfort, and safety, and their manufacturing quality directly affects the overall vehicle performance. Currently, the industry commonly uses die casting for the molding and processing of automotive shock absorber components, and the corresponding molds are usually equipped with demolding mechanisms to separate the finished product from the mold. Among existing demolding mechanisms, the ejector pin type demolding structure is widely used due to its simple design and low cost.

[0003] The core working principle of traditional ejector-pin demolding structures is to directly contact the surface of the molded product with the ejector pin and apply a pushing force to complete demolding. However, due to the multi-turn spiral structure on automotive shock absorber parts, a large clamping force is formed between the ejector pin and the mold cavity wall after molding, making it difficult to demold by simply relying on the ejector pin to directly act on the product surface. This not only makes demolding difficult but may also damage the product surface due to forced demolding, significantly reducing the yield rate and increasing production costs. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a molding die for automotive shock absorber components, which reduces demolding difficulty and improves product qualification rate.

[0005] Therefore, the technical solution of this utility model is: a molding die for automotive shock absorber parts, including a front mold frame, a middle mold frame, a rear mold frame, and an ejection mechanism; the front mold frame is provided with at least one die-casting groove, the rear mold frame is provided with at least one shaping column, and the top of the shaping column is provided with a die-casting part; the middle mold frame is provided with at least one die-casting hole in the middle for the shaping column to pass through, and the die-casting hole is provided with a ring-shaped stepped surface, and the shaping column fits into the inner ring of the ring-shaped stepped surface; the die-casting part of the shaping column is inserted into the die-casting hole and is assembled with the die-casting groove to form a cavity; The ejection mechanism includes an ejection base, with a plurality of ejector pins in the middle and slender push rods on both sides; the middle mold frame is provided with a plurality of sprue channels communicating with the cavity, and the sprue channels are provided with ejector pin holes for the ejector pins to pass through. The middle mold frame is provided with retractable locking blocks on both sides, and the top of the push rod abuts against the locking blocks; the rear mold frame is provided with guide blocks on both sides, and the guide blocks have an inclined guide surface on the side facing the locking blocks; as the ejector base moves towards the front mold frame, the push rod pushes the middle mold frame and the rear mold frame to separate through the locking blocks, and the locking blocks retract and disengage from the push rod under the action of the guide surface; and as the ejector base continues to move, the ejector pin is ejected from the ejector pin hole of the sprue.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the side of the middle mold frame is provided with a first mounting groove, and a card block mounting seat is provided in the first mounting groove; the card block mounting seat is provided with a slot in the middle to accommodate the card block, and through pin holes are provided on both sides of the slot; the card block is provided with horizontal moving grooves on both sides, and the front end of the card block is provided with an inclined surface; the card block is placed in the slot, and the pins on both sides pass through the pin holes and are inserted into the moving groove.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the guide block is provided with a guide groove for the push rod to pass through on the side facing the card block, and a notch is provided on both sides of the guide groove, with the upper end of the notch being a guide surface; a movable sleeve is installed on the side of the middle mold frame, and the movable sleeve is fitted on the outside of the guide block.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the front mold frame is provided with a sprue sleeve, the middle mold frame is provided with a boss that matches the bottom of the sprue sleeve, the boss is connected to the inlet channel, and the sprue sleeve is connected to the cavity through the inlet channel.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the side of the cavity is also provided with a waste slag flow channel, and the waste slag flow channel is provided with a pin hole.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the front mold base, the middle mold base, and the rear mold base are assembled into four symmetrically arranged cavities, and the gating channels are connected to each cavity through various branches, with ejector pin holes provided at the branches.

[0011] The demolding steps are as follows: After die casting is completed, the front mold frame is mechanically driven to detach from the middle mold frame; The rear mold frame is equipped with an ejector mechanism. The power mechanism of the ejector mechanism pushes the ejector base, and the ejector base drives the ejector pin and push rod to move towards the middle mold frame. At this time, the locking blocks on both sides of the middle mold frame are in a protruding state, and the top of the push rod abuts against the locking blocks, pushing the locking blocks and the middle mold frame to move upward. When moving upward, the annular step surface of the die-casting hole on the middle mold frame will push the outer edge of the die-cast automotive shock absorber to move upward, thereby causing the die-cast automotive shock absorber to loosen between the top of the shaping column. As the push rod pushes the locking block upward, the locking block retracts inward under the action of the inclined guide surface of the guide block. Once the locking block is fully retracted into the slot of the locking block mounting seat, the push rod will no longer act on the middle mold frame. The ejector base continues to move, pushing the ejector pin through the ejector pin holes in the gating channel and slag channel on the middle mold frame. That is, the ejector pin acts on the slag and waste generated during the die casting process, completely removing the product. Through the secondary ejection operation, the demolding of the automotive shock absorber parts is completed.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Demolding is achieved through a two-stage ejection process. The first ejection pushes the middle mold frame with a push rod, and the annular stepped surface of the die-casting hole acts on the outer edge of the product, causing the product to loosen from the top of the shaping column and initially releasing the clamping force. The second ejection uses ejector pins to completely remove the product, thus effectively solving the problem of difficult demolding caused by the large clamping force in traditional ejector pin demolding.

[0013] During the secondary ejection, the ejector pins act on the slag bag and waste residue. The entire process eliminates the need for ejector pins to directly and forcefully act on the product surface, significantly reducing surface scratches, deformation, and other defects during demolding, and substantially improving the finished product yield. Simultaneously, the increased yield reduces the scrap rate, minimizing raw material waste and rework costs, thereby achieving effective control over production costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is an exploded view of the parts of this utility model; Figure 5 This is a schematic diagram of the front mold frame of this utility model; Figure 6 This is a schematic diagram of the structure of the middle mold frame and the rear mold frame of this utility model; Figure 7 This is a schematic diagram showing the cooperation between the locking block and the push rod of this utility model; Figure 8 This is an exploded view of the card block and push rod of this utility model; Figure 9 This is a schematic diagram of the structure of the mold frame in this utility model; Figure 10 This is a structural diagram of an automotive shock absorber component.

[0015] The components in the diagram are labeled as follows: front mold base 1, front mold core 11, die casting groove 12, sprue sleeve 13, middle mold base 2, middle mold core 21, die casting hole 22, annular step surface 23, boss 24, inlet runner 25, waste slag runner 26, ejector pin hole 27, first mounting groove 28, locking block mounting seat 29, locking block 210, pin hole 211, moving groove 212, pin 213, moving sleeve 214, rear mold base 3, rear mold core 31, shaping column 32, die casting part 33, guide block 34, guide groove 35, notch 36, guide surface 37, ejection mechanism 4, ejection base 41, ejector pin 42, push rod 43, automotive shock absorber parts 5, spiral structure 51, outer edge 52. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0018] See the attached drawings. The molding die for the automotive shock absorber components described in this embodiment includes a front mold frame 1, a middle mold frame 2, a rear mold frame 3, and an ejection mechanism 4. The front mold frame 1 contains a front mold core 11, which has four die-casting grooves 12. The rear mold frame 3 contains a rear mold core 31, which has four shaping pillars 32 fixed inside. Each shaping pillar 32 has a die-casting part 33 at its top. The middle mold frame 2 has a middle mold core 21 in the middle, which has four shaping pillars. The die-casting hole 22 passes through the die-casting hole, and an annular stepped surface 23 is provided inside the die-casting hole 22. The shaping column 32 fits into the inner circle of the annular stepped surface 23. The die-casting part 33 of the shaping column 32 is inserted into the die-casting hole 22 and is assembled with the die-casting groove 12 to form a cavity. The die-cast automotive shock absorber 5 is annular in shape, and a spiral structure 51 is provided on one side. Its outer edge 52 fits into the annular stepped surface 23. The spiral structure 51 is formed by the die-casting part 33 at the top of the shaping column 32.

[0019] The front mold base 1 is provided with a sprue sleeve 13, and the middle mold base 2 is provided with a boss 24 adapted to the bottom of the sprue sleeve 13 and a sprue runner 25. The boss 24 is connected to the sprue runner 25, and the sprue sleeve 13 is connected to the cavity through the sprue runner 25. The sprue runner 25 is connected to each cavity through various branches. The side of the cavity is also provided with a waste slag runner 26, and the sprue runner 25 and the waste slag runner 26 are provided with ejector pin holes 27 for ejector pins to pass through. At the same time, the corresponding position on the rear mold base 3 is also provided with a through hole for ejector pins to pass through.

[0020] The ejection mechanism 4 includes an ejection base 41, which is pushed by a power mechanism, such as a hydraulic cylinder. The ejection base 41 has several ejector pins 42 in the middle and slender push rods 43 on both sides. The ejector pins 42 pass through the through hole of the rear mold frame 3 into the ejector pin hole 27 of the middle mold frame 2, and can then pass out through the ejector pin hole to act on the slag bag and waste residue, without directly acting on the product surface.

[0021] The middle mold frame 2 has first mounting grooves 28 on both sides, and a block mounting seat 29 is provided in the first mounting groove 28; the block mounting seat 29 has a slot in the middle to accommodate the block 210, and through pin holes 211 are provided on both sides of the slot; the block 210 has horizontal moving grooves 212 on both sides, and the front end of the block 210 has an inclined surface; the block 210 is placed in the slot, and the pins 213 on both sides pass through the pin holes 211 and are inserted into the moving grooves 212; the top of the push rod 43 abuts against the lower end face of the block 210.

[0022] The rear mold frame 3 is provided with guide blocks 34 on both sides. The guide blocks 34 are provided with guide grooves 35 for the push rod 43 to pass through on the side facing the locking block 210. There is a notch 36 on both sides of the guide groove 35, and the upper end of the notch 36 is an inclined guide surface 37. The middle mold frame 2 is provided with a movable sleeve 214 on the side. The movable sleeve 214 is fitted on the outside of the guide block 34, which can make the movement of the middle mold frame 2 more stable.

[0023] During the movement of the ejector base 41 toward the front mold frame 1, the push rod 43 first pushes the middle mold frame 2 and the rear mold frame 3 apart through the locking block 210, and the locking block 210 retracts and disengages from the push rod 43 under the action of the guide surface 37. Before the locking block 210 retracts, the middle mold frame 2 and the ejector base 41 move synchronously, so the ejector pin 42 does not move relative to the ejector pin hole 27 of the middle mold frame 2. After the locking block 210 retracts, the push rod 43 separates from the middle mold frame 2, and the ejector base 41 continues to move. The distance between the middle mold frame 2 and the ejector base 41 is decreasing, so that the ejector pin 42 is ejected from the ejector pin hole 27 of the inlet flow channel 25 and the waste slag flow channel 26, ejecting the die-cast product.

[0024] The demolding steps are as follows: 1) After die casting is completed, the front mold frame 1 is mechanically driven to separate from the middle mold frame 2; 2) The rear mold frame 3 is equipped with an ejector mechanism 4. The power mechanism of the ejector mechanism 4 pushes the ejector base 41, and the ejector base 41 drives the ejector pin 42 and the push rod 43 to move toward the middle mold frame 2. 3) At this time, the locking blocks 210 on both sides of the middle mold frame 2 are in a protruding state. The top of the push rod 43 abuts against the locking blocks 210, pushing the locking blocks 210 and the middle mold frame 2 to move upward. When moving upward, the annular step surface 23 of the die-casting hole 22 on the middle mold frame 2 will push the outer edge 52 of the die-cast automotive shock absorber 5 to move upward, thereby causing the die-cast automotive shock absorber 5 to loosen between the top of the shaping column 32. 4) As the push rod 43 pushes the locking block 210 upward, the locking block 210 retracts inward under the action of the inclined guide surface 37 of the guide block 34. After the locking block 210 is completely retracted into the slot of the locking block mounting seat 29, the push rod 43 will no longer act on the middle mold frame 2. 5) The ejector base 41 continues to move, pushing the ejector pin 42 through the ejector pin hole 27 of the gating channel 25 and the waste slag channel 26 on the middle mold frame 2. That is, the ejector pin acts on the slag bag and waste slag generated during the die casting process, and completely removes the product. Through the secondary ejection operation, the demolding work of the automotive shock absorber part 5 is completed.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A forming die for an automotive shock absorbing component, characterized by: It includes a front mold frame, a middle mold frame, a rear mold frame, and an ejection mechanism; the front mold frame has at least one die-casting groove, the rear mold frame has at least one shaping column, and the top of the shaping column has a die-casting part; the middle mold frame has at least one die-casting hole in the middle for the shaping column to pass through, and the die-casting hole has a ring-shaped stepped surface, and the shaping column fits into the inner ring of the ring-shaped stepped surface; the die-casting part of the shaping column is inserted into the die-casting hole and is assembled with the die-casting groove to form a cavity; The ejection mechanism includes an ejection base, with a plurality of ejector pins in the middle and slender push rods on both sides; the middle mold frame is provided with a plurality of sprue channels communicating with the cavity, and the sprue channels are provided with ejector pin holes for the ejector pins to pass through. The middle mold frame is provided with retractable locking blocks on both sides, and the top of the push rod abuts against the locking blocks; the rear mold frame is provided with guide blocks on both sides, and the guide blocks have an inclined guide surface on the side facing the locking blocks; as the ejector base moves towards the front mold frame, the push rod pushes the middle mold frame and the rear mold frame to separate through the locking blocks, and the locking blocks retract and disengage from the push rod under the action of the guide surface; and as the ejector base continues to move, the ejector pin is ejected from the ejector pin hole of the sprue.

2. The forming die for an automobile shock absorbing member according to claim 1, wherein: The middle mold frame has a first mounting groove on its side, and a card block mounting seat is provided in the first mounting groove; the card block mounting seat has a slot in the middle to accommodate the card block, and through pin holes are provided on both sides of the slot; the card block has horizontal moving grooves on both sides, and an inclined surface at the front end of the card block; the card block is placed in the slot, and the pins on both sides pass through the pin holes and are inserted into the moving groove.

3. The forming die for an automotive shock absorber component of claim 1 wherein: The guide block has a guide groove on the side facing the card block for the push rod to pass through. There is a notch on both sides of the guide groove, and the upper end of the notch is the guide surface. A movable sleeve is installed on the side of the middle mold frame, and the movable sleeve is fitted on the outside of the guide block.

4. The forming die for an automotive shock absorber component of claim 1 wherein: The front mold frame is provided with a sprue sleeve, and the middle mold frame is provided with a boss that fits the bottom of the sprue sleeve. The boss is connected to the inlet channel, and the sprue sleeve is connected to the cavity through the inlet channel.

5. The forming die for an automotive shock absorber component of claim 1 wherein: The cavity side is also provided with a waste slag flow channel, and the waste slag flow channel is provided with a pin hole.

6. The forming die for an automotive shock absorber component of claim 1 wherein: The front mold base, middle mold base, and rear mold base are assembled into four symmetrically arranged cavities. The gating channels are connected to each cavity through various branches, and ejector pin holes are provided at the branches.

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