Mold core structure for forming automobile parts and injection molding apparatus

Abstract

The utility model relates to the technical field of automobile parts, provide a kind of for the die structure of forming automobile parts and injection molding equipment, die structure includes first die, second die and forming mechanism;Forming mechanism includes first forming structure and second forming structure, first forming structure is movably connected in first die, second forming structure rotatably connects first die;Base can move away from second forming structure with first forming structure, and first forming structure and the counterbore portion of base between the opposite end surface of two have stripping interval, contact jamming with bending area is reduced by angle adjustment, realize smooth separation;For plane area, first forming structure is movable, and base moves away from second forming structure with it, cooperate the stripping interval between two, change the stripping mode of conventional straight line drawing, avoid the stripping resistance caused by structural features in plane area.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a mold core structure and injection molding equipment for molding automotive parts. Background Technology

[0002] Automotive parts, such as flat-bottomed charging port holders, often feature a connecting end for attaching a cover-like component. However, the undercut portion of this connecting end has both a flat area and a curved area. This unique undercut design presents significant demolding challenges: firstly, the curved area's internal space is limited, making smooth demolding difficult; secondly, the flat area's structural characteristics render conventional demolding methods ineffective. These two demolding obstacles place higher technical demands and unique challenges on the mold core's structural design. Utility Model Content

[0003] This utility model provides a mold core structure for molding automotive parts, which solves the problem in related technologies that the curved area of ​​the base is difficult to demold smoothly due to the limitation of the internal space layout of the mold core; on the other hand, the structural features of the planar area make conventional demolding methods ineffective.

[0004] This utility model provides a mold core structure for molding automotive parts, comprising:

[0005] The first mold core has a first cavity;

[0006] The second mold core is movable relative to the first mold core and the second mold core. The second mold core is provided with a second cavity. The first cavity and the second cavity are connected to form a mold cavity. The mold cavity is used to form a base.

[0007] A molding mechanism is provided in the first mold core. The molding mechanism includes a first molding structure and a second molding structure. The first molding structure and the second molding structure are at least partially located in the first cavity. The first molding structure is movably connected to the first mold core, and the second molding structure is rotatably connected to the first mold core.

[0008] The first molding structure is used to mold the flat area of ​​the undercut portion of the base, and the second molding structure is used to mold the curved area of ​​the undercut portion of the base.

[0009] The second molding structure rotates to disengage from the bent area of ​​the undercut portion of the base;

[0010] The base can move away from the second molding structure following the first molding structure, and there is a demolding gap between the opposite end faces of the first molding structure and the undercut portion of the base.

[0011] According to the present invention, a mold core structure for molding automotive parts is provided, wherein the first molding structure includes:

[0012] An inclined ejector is movably disposed within the first cavity of the first mold core;

[0013] The inner wall of the first cavity is provided with a first inclined surface, and the inclined top member is provided with a second inclined surface that abuts against the first inclined surface.

[0014] According to the present invention, a mold core structure for molding automotive parts is provided, wherein the inclined ejector is provided with a limiting part, and the second mold core is provided with a limiting protrusion located in the second cavity;

[0015] The limiting part abuts against the limiting protrusion to restrict the movement of the inclined ejector relative to the first cavity during molding.

[0016] According to the present invention, a mold core structure for molding automotive parts is provided, wherein the limiting part is a limiting recess formed on the inclined ejector.

[0017] According to the present invention, a mold core structure for molding automotive parts is provided, wherein the first molding structure is provided with an adaptive concave surface, and the adaptive concave surface abuts and adapts to a portion of the structure of the second molding structure.

[0018] According to the present invention, a mold core structure for molding automotive parts is provided, wherein the second molding structure includes:

[0019] The first core-pulling component is rotatably connected to the first mold core, and the first core-pulling component is provided with a first arc portion;

[0020] The second core-pulling component is rotatably connected to the first mold core. The second core-pulling component has a second arc portion, and there is a gap between the first arc portion and the second arc portion to form a cavity. The cavity is used to form the undercut bending area of ​​the base.

[0021] A drive assembly includes a transmission unit and a drive unit, wherein the transmission unit is configured to be movable, the first core-pulling member and the second core-pulling member are both drive-connected to the transmission unit, and the drive unit is drive-connected to the transmission unit.

[0022] The drive unit drives the transmission unit to move, and the first core-pulling component and the second core-pulling component rotate synchronously.

[0023] According to the mold core structure for molding automotive parts provided by this utility model, the second molding structure further includes:

[0024] A mounting shaft is provided on the first mold core, and both the first core-pulling component and the second core-pulling component are rotatably sleeved on the mounting shaft.

[0025] According to the present invention, a mold core structure for molding automotive parts is provided.

[0026] The transmission unit includes:

[0027] A movable component, configured to be movable, the movable component being drive-connected to the drive unit, the movable component being provided with a drive ramp;

[0028] A first transmission component, one end of which is rotatably connected to the moving component, and the other end of which is rotatably connected to the first core-pulling component;

[0029] The second transmission component has one end abutting against and slidably engaging with the transmission inclined surface, and the other end being movably connected to the second core-pulling component.

[0030] According to the present invention, a mold core structure for molding automotive parts is provided, wherein one of the first mold core and the second transmission component is provided with a guide protrusion along its height direction, and the other of the first mold core and the second transmission component is provided with a guide groove along its height direction that is slidably connected to the guide protrusion.

[0031] This utility model also provides an injection molding equipment, including an injection mold and the above-mentioned mold core structure for molding automotive parts, wherein the mold core structure is disposed on the injection mold.

[0032] The mold core structure for molding automotive parts provided by this utility model solves the demolding problem of the bent area and flat area of ​​the undercut part of the base by setting up a movable first molding structure and a rotatable second molding structure. For the bent area, the second molding structure is detached by rotation, which breaks through the limitation of the internal space of the mold core on straight demolding. By adjusting the angle, the contact jamming with the bent area is reduced, and smooth separation is achieved. For the flat area, the first molding structure is movable, and the base moves away from the second molding structure as it moves. With the demolding distance between the two, it changes the conventional straight pulling demolding method and avoids the demolding resistance caused by the structural characteristics of the flat area (such as tight fit or special contour), thus effectively solving the problem of difficult demolding of the flat area. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the injection mold provided by this utility model.

[0035] Figure 2 This is a cross-sectional schematic diagram of the injection mold provided by this utility model.

[0036] Figure 3 This is a schematic diagram of the mold core structure provided by this utility model.

[0037] Figure 4 This is an exploded view of the core structure provided by this utility model.

[0038] Figure 5 This is a schematic diagram of the structure of the second mold core provided by this utility model.

[0039] Figure label:

[0040] 100. First mold core; 110. First cavity; 111. First inclined plane;

[0041] 200. Second mold core; 210. Second cavity; 211. Limiting protrusion;

[0042] 300. First forming structure; 310. Angled top part; 311. Second inclined surface; 312. Limiting part; 313. Adaptive concave surface; 320. Drive inclined rod;

[0043] 400. Second molding structure; 410. First core-pulling component; 411. First arc portion; 412. First rotating recess; 420. Second core-pulling component; 421. Second arc portion; 422. Transmission channel;

[0044] 430. Transmission unit; 431. Moving part; 4311. Second rotation recess; 4312. Limiting groove; 43121. Transmission inclined surface; 432. First transmission component; 433. Second transmission component; 4331. Transmission part; 4332. Guide groove; 440. Drive unit; 500. Mounting shaft; 600. First template; 700. Second template; A. Base; A1. Undercut flat area; A2. Undercut bending area. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] The following is combined Figures 1-5 This invention describes the mold core structure and injection molding equipment for molding automotive parts.

[0047] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the mold core structure for molding automotive parts includes a first mold core 100, a second mold core 200, and a molding mechanism. The first mold core 100 has a first cavity 110, and the first mold core 100 and the second mold core 200 are movable relative to each other. The second mold core 200 has a second cavity 210, and the first cavity 110 and the second cavity 210 communicate to form a mold cavity, which is used to mold a base A. The molding mechanism is located in the first mold core 100, and the rotating molding mechanism includes a first molding structure 300 and a second molding structure 400. The first molding structure 300 and the second molding structure 400 are at least partially located in the first cavity 110. The first molding structure 300 is movably connected to the first mold core 100, and the second molding structure 400 is rotatably connected to the first mold core 100.

[0048] The first molding structure 300 is used to mold the undercut flat area A1 of the base A, and the second molding structure 400 is used to mold the undercut bending area A2 of the base A; the second molding structure 400 rotates to disengage from the undercut bending area A2 of the base A.

[0049] The base A can move away from the second molding structure 400 along with the first molding structure 300, and there is a demolding gap between the opposite end faces of the first molding structure 300 and the undercut part of the base A.

[0050] The mold core structure for molding automotive parts provided by this utility model solves the demolding problem between the bent area A2 of the undercut part of the base A and the flat area by separating a movable first molding structure 300 and a rotatable second molding structure 400. For the bent area, the second molding structure 400 is detached by rotation, breaking through the limitation of the internal space of the mold core on straight demolding. By adjusting the angle, the contact jamming with the bent area is reduced, and smooth separation is achieved. For the flat area, the first molding structure 300 is movable, and the base A moves away from the second molding structure 400 as it moves. With the demolding distance between the two, the conventional straight pulling demolding method is changed, avoiding the demolding resistance caused by the structural features of the flat area (such as tight fit or special contour), thus effectively solving the problem of difficult demolding of the flat area.

[0051] In some examples of this utility model, the injection mold and the above-mentioned mold core structure for molding automotive parts are provided on the injection mold.

[0052] Specifically, refer to Figure 1 and Figure 2 In this embodiment, the injection mold includes a first template 600, a second template 700, and the aforementioned rotating ejection molding mechanism. The first template 600 is provided with a first mold core 100, which has a first cavity 110. The second template 700 is movable relative to the first template 600 and the second template 700 is provided with a second mold core 200, which has a second cavity 210. The first cavity 110 and the second cavity 210 surround a mold cavity for molding a base A. A driving assembly is provided on the first template 600. The first core-pulling member 410 and the second core-pulling member 420 are rotatably connected to the first mold core 100, and both the first core-pulling member 410 and the second core-pulling member 420 are at least partially located within the first cavity 110.

[0053] Because the injection molding equipment has the above-mentioned mold core structure, it also has the effects of the above-mentioned mold core structure.

[0054] Understandably, referring to Figures 2 to 4 In some examples of this utility model, the first molding structure 300 includes: an inclined ejector 310, which is movably disposed in the first cavity 110 of the first mold core 100; the inner sidewall of the first cavity 110 is provided with a first inclined surface 111, and the inclined ejector 310 is provided with a second inclined surface 311 that abuts against the first inclined surface 111.

[0055] This structure achieves oblique demolding guidance through the use of inclined surfaces, effectively improving demolding smoothness and accuracy: the first inclined surface 111 on the inner sidewall of the first cavity 110 abuts against the second inclined surface 311 on the inclined ejector 310, converting the linear movement of the inclined ejector 310 into an inclined displacement along the inclined surface, allowing the inclined ejector 310 to slide and disengage from the flat area, avoiding jamming or product damage caused by direct vertical / horizontal pulling; at the same time, the guiding constraint of the inclined surface ensures the stability and positional accuracy of the movement of the inclined ejector 310, reducing the risk of movement deviation, which not only reduces demolding resistance, but also ensures the molding quality of the flat area and the mold life.

[0056] It should be noted that in this embodiment, the first mold core 100 is provided with a driving inclined rod 320, which is connected to the inclined ejector 310 in a transmission manner to drive the inclined ejector 310 to move.

[0057] In some examples of this utility model, there is a demolding gap between the opposing end faces of the first molding structure 300 and the undercut portion of the base A. This can be understood as, with reference to... Figures 2 to 4 Along the left and right direction of base A, the right end of base A is the connecting end. After base A is formed, the second forming structure 400 rotates to disengage from the bending area of ​​the connecting end of base A. At the same time, the first forming structure 300 drives base A to move. During this process, the first forming structure 300 gradually has a demolding gap from abutting the right side of the connecting end of base A. At this time, the robot can drive base A to flip to disengage from the mold core structure, and finally complete the overall demolding of base A.

[0058] Reference Figure 2 , Figure 4 and Figure 5 In some examples of this utility model, the inclined top member 310 is provided with a limiting part 312, and the second mold core 200 is provided with a limiting protrusion 211 located in the second cavity 210;

[0059] The limiting part 312 abuts against the limiting protrusion 211 to restrict the movement of the inclined ejector 310 relative to the first cavity 110 during molding.

[0060] By adopting the above structure, the limiting part 312 on the inclined ejector 310 abuts against the limiting protrusion 211 of the second mold core 200, effectively limiting the unintended movement of the inclined ejector 310 relative to the first cavity 110 during the molding stage. The rigid contact between the limiting part 312 and the limiting protrusion 211 provides precise positional constraint for the inclined ejector 310, ensuring that it maintains the set initial position during mold closing and molding, avoiding the offset of the inclined ejector 310 due to mold vibration, melt pressure or other external force interference, thereby ensuring the dimensional accuracy and shape accuracy of the product molding surface. At the same time, this limiting structure prevents the inclined ejector 310 from abnormally colliding or interfering with other parts of the mold core during the molding process, reducing the risk of mold wear and improving the stability of the molding process and product consistency.

[0061] In some examples of this utility model, the limiting part 312 is a limiting recess formed on the inclined top part 310.

[0062] Multi-dimensional optimization has been achieved. When the recessed limiting recess structure cooperates with the limiting protrusion 211, the concave contact surface increases the cooperation area, improves the positioning accuracy, and avoids dimensional deviations caused by offset during molding of the inclined ejector 310. The machining of the recessed limiting recess can be achieved through conventional machining, which simplifies the manufacturing process. Moreover, the space reserved in the limiting recess provides a buffer for the slight elastic deformation of the inclined ejector 310, avoiding jamming caused by thermal expansion or force, thereby improving the mold assembly efficiency, demolding smoothness, and long-term reliability.

[0063] It should be noted that in this embodiment, there is an assembly gap between the limiting recess and the inner wall of the first cavity 110. This assembly gap can be understood as being used to allow the limiting protrusion 211 to be inserted into the limiting recess. In addition, through the contact and engagement of the first inclined surface 111 and the second inclined surface 311, the inclined ejector 310 moves up and down. The function of the assembly gap is to provide the inclined ejector with a moving space during the movement. The relative movement between the inclined ejector and the base A allows the right side of the inclined ejector 310 and the connection end of the base A to gradually form a demolding gap, which can then be achieved by rotating the base A through the robotic arm device to complete the demolding.

[0064] Of course, in some examples, the aforementioned limiting part 312 can also be a limiting plate or a limiting hole, which is not limited here.

[0065] Understandably, referring to Figure 2 and Figure 4 In some examples of this utility model, the first molding structure 300 is provided with an adaptive concave surface 313, which abuts against and is adapted to a portion of the structure of the second molding structure 400.

[0066] Specifically, the inclined top part 310 is provided with a matching concave surface 313.

[0067] The precise fit and contact between the adapting concave surface 313 on the inclined ejector 310 of the first molding structure 300 and a portion of the structure of the second molding structure 400 significantly improves the coordination and reliability of the mold's movements. The shape of the adapting concave surface 313 complements the corresponding part of the second molding structure 400, providing clear positioning guidance for the second molding structure 400 during mold closing, avoiding misalignment or gaps caused by fit deviations, and ensuring the consistency of the molding surface. On the other hand, during demolding, the guiding characteristics of the concave surface can constrain the movement trajectory of the second molding structure 400 (such as rotation or movement), reducing abnormal collisions or friction between it and the first molding structure 300, and lowering the risk of wear. At the same time, the adapting contact method increases the contact area, disperses local stress, extends the service life of key mold components, and ultimately achieves high precision and high stability in the molding process.

[0068] Understandably, referring to Figure 2 and Figure 4 In this embodiment of the utility model, the second molding structure 400 includes a first core-pulling component 410, a second core-pulling component 420 and a driving assembly. The first core-pulling component 410 is rotatably connected to the first mold core 100 and is provided with a first arc portion 411.

[0069] The second core-pulling component 420 is rotatably connected to the first mold core 100. The second core-pulling component 420 is provided with a second arc portion 421. There is a gap between the first arc portion 411 and the second arc portion 421 to form a cavity. The cavity is used to form the undercut bending area A2 of the base A.

[0070] The drive assembly includes a transmission unit 430 and a drive unit 440. The transmission unit 430 is configured to be movable. The first core-pulling member 410 and the second core-pulling member 420 are both drive-connected to the transmission unit 430. The drive unit 440 is drive-connected to the transmission unit 430.

[0071] The drive unit 440 drives the transmission unit 430 to move, and the first core-pulling component 410 and the second core-pulling component 420 rotate synchronously.

[0072] The drive unit 440 transmits the power to the transmission unit 430, driving the first core-pulling component 410 and the second core-pulling component 420 to rotate synchronously relative to each other. This allows the two components to interfere with each other's rotation paths in space, and the synergy of their synchronous motion reduces the rotation stroke requirement of a single core-pulling component. When the first core-pulling component 410 and the second core-pulling component 420 rotate synchronously in opposite directions, it helps to ensure that the specified rotation angle is completed and that the core-pulling component smoothly disengages from the undercut bending area A2 of the base A after the base A is formed, thereby improving demolding reliability and production efficiency.

[0073] Understandably, referring to Figure 2 and Figure 4In this embodiment of the utility model, the transmission unit 430 includes a movable member 431, a first transmission member 432, and a second transmission member 433. The movable member 431 is configured to be movable and is connected to the drive unit 440. The movable member 431 is provided with a transmission inclined surface 43121. One end of the first transmission member 432 is rotatably connected to the movable member 431, and the other end of the first transmission member 432 is rotatably connected to the first core-pulling member 410. One end of the second transmission member 433 abuts against the transmission inclined surface 43121 and is slidably engaged, and the other end of the second transmission member 433 is movably connected to the second core-pulling member 420.

[0074] Specifically, refer to Figure 2 The movable component 431 is configured to be movably set on the first template 600, and the drive unit 440 is mounted on the first template 600.

[0075] When the drive unit 440 drives the moving part 431 to move linearly, the transmission inclined surface 43121 on the moving part 431 pushes the second transmission part 433 to slide. At the same time, the movement of the moving part 431 itself will also drive the first transmission part 432 to rotate, thereby driving the first core-pulling part 410 to rotate. The sliding of the second transmission part 433 will push the second core-pulling part 420 to rotate in the opposite direction, thus realizing the synchronous opposite rotation of the two core-pulling parts. This ingenious dual-path transmission design, by controlling the coordinated movement of the two core-pulling parts simultaneously through a single drive source, not only greatly simplifies the mold structure, but also ensures a high degree of synchronization of the demolding action, effectively solving the demolding problem of complex undercut structures, while improving demolding efficiency and mold service life.

[0076] Specifically, refer to Figure 2 and Figure 4 In some examples of this utility model, the first mold core 100 is provided with a guide protrusion along its height direction, and the second transmission member 433 is provided with a guide groove 4332 that is slidably connected to the guide protrusion.

[0077] The sliding engagement between the guide protrusion and the guide groove 4332 provides precise guiding constraints for the relative movement of the first mold core 100 and the second transmission component 433 in the height direction: after the guide protrusion is embedded in the guide groove 4332, it strictly limits the two to sliding in a straight line along the height direction, avoiding lateral offset or angular deviation, and ensuring the consistency of the movement trajectory.

[0078] Of course, in some examples, the aforementioned guide protrusion can also be provided on the second transmission mechanism, and the guide groove 4332 can also be provided on the first mold core 100.

[0079] Understandably, referring to Figure 2In some examples of this utility model, the first core-pulling member 410 is provided with a first rotating recess 412, and the moving member 431 is provided with a second rotating recess 4311.

[0080] One end of the first transmission member 432 is located at the first rotation recess 412, and the other end of the first transmission member 432 is located at the second rotation recess 4311.

[0081] When the drive unit 440 drives the moving member 431 to move, the second rotating recess 4311 on the moving member 431 forms a rotating pair with one end of the first transmission member 432. At the same time, the other end of the first transmission member 432 rotates within the first rotating recess 412 of the first core-pulling member 410, thereby converting the linear motion of the moving member 431 into the rotational motion of the first core-pulling member 410. This achieves efficient synchronous demolding of the undercut bending area A2 of the base A, significantly improving demolding efficiency and mold reliability, while simplifying the transmission mechanism design and reducing mold manufacturing and maintenance costs.

[0082] Understandably, referring to Figure 2 and Figure 4 In some examples of this utility model, the moving part 431 is provided with a limiting groove 4312, and the transmission inclined surface 43121 is provided on the bottom wall of the limiting groove 4312.

[0083] The moving part 431 is equipped with a limiting groove 4312 (arranged at an inclination) and a transmission inclined surface 43121 on its bottom wall. The linear movement of the moving part 431 is guided by the inclined groove, which can accurately guide the sliding trajectory of the second transmission part 433 and avoid lateral deviation and jamming. The limiting groove 4312 can also limit and improve the stability of the movement. At the same time, this design integrates multi-directional movement into a single moving part 431, which simplifies the complexity of the mechanism, saves mold space, and effectively improves the transmission efficiency and demolding reliability.

[0084] Understandably, referring to Figure 2 and Figure 4 In some examples of this utility model, the second core-pulling member 420 is provided with a transmission channel 422, and the second transmission member 433 is provided with a transmission part 4331, which is slidably inserted into the transmission channel 422.

[0085] When the drive unit 440 moves the moving part 431, the second transmission part 433 slides along the transmission ramp 43121 within the transmission channel 422, guiding the second core-pulling part 420 to complete the rotational demolding action. Simultaneously, the moving part 431 drives the first core-pulling part 410 to rotate synchronously in the opposite direction via a rotating recess. This ingenious sliding fit design achieves two major technological breakthroughs: firstly, the precise guidance of the transmission channel 422 and the transmission part 4331 ensures the stability and accuracy of the movement trajectory of the second core-pulling part 420, effectively avoiding the jamming problem common in traditional mechanisms; secondly, it efficiently converts the longitudinal movement of the second transmission part 433 into the rotational movement of the core-pulling part, achieving precise conversion of motion forms and enabling the two core-pulling parts to rotate strictly synchronously, significantly improving demolding efficiency. This structure not only simplifies the transmission system and reduces the number of parts but also significantly improves motion reliability, providing an innovative solution for the efficient demolding of complex undercut structures.

[0086] Understandably, referring to Figure 2 and Figure 4 In some examples of this utility model, the mold core structure further includes a mounting shaft 500, and both the first core-pulling member 410 and the second core-pulling member 420 are rotatably sleeved on the mounting shaft 500. Specifically, in this embodiment, the mounting shaft 500 is connected to the first mold core 100.

[0087] By using a coaxial mounting shaft 500 as a common rotation fulcrum, the first core-pulling component 410 and the second core-pulling component 420 can rotate synchronously around the same axis for demolding. The drive unit 440, through the linkage mechanism of the moving component 431, the transmission inclined surface 43121, and the transmission channel 422, precisely controls the two core-pulling components to maintain strict synchronous rotation. The coaxial design not only ensures the concentricity and motion consistency of the core-pulling components during rotation, effectively avoiding jamming or wear caused by axis misalignment, but also significantly simplifies the mechanism structure and improves motion accuracy and reliability. This solution achieves efficient synchronous demolding of complex undercut structures through a coaxial layout, significantly improving the stability and service life of the mold, while reducing assembly difficulty and maintenance costs.

[0088] Of course, in some other examples, the first core-pulling component 410 and the second core-pulling component 420 can also achieve synchronous movement by being mounted on different shafts, as long as the rotation centers of the first core-pulling component 410 and the second core-pulling component 420 coincide. Of course, in some other examples, the rotation centers of the first core-pulling component 410 and the second core-pulling component 420 do not coincide, as long as synchronous movement is guaranteed.

[0089] It should be noted that the drive unit 440 (such as a cylinder, motor, or hydraulic cylinder) outputs power to drive the transmission unit 430 to move. Specifically, in this embodiment, the drive unit 440 is an external hydraulic cylinder.

[0090] Of course, in other examples, the aforementioned transmission unit 430 can also be a gear rack, crank slider or linkage mechanism, etc., which receives power and converts the input motion in a single direction into a compound motion such as rotation + translation.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mold core structure for molding automotive parts, characterized in that, include: The first mold core has a first cavity; The second mold core is movable relative to the first mold core and the second mold core. The second mold core is provided with a second cavity. The first cavity and the second cavity are connected to form a mold cavity. The mold cavity is used to form a base. A molding mechanism is provided in the first mold core. The molding mechanism includes a first molding structure and a second molding structure. The first molding structure and the second molding structure are at least partially located in the first cavity. The first molding structure is movably connected to the first mold core, and the second molding structure is rotatably connected to the first mold core. The first molding structure is used to mold the flat area of ​​the undercut portion of the base, and the second molding structure is used to mold the curved area of ​​the undercut portion of the base. The second molding structure rotates to disengage from the bent area of ​​the undercut portion of the base; The base can move away from the second molding structure following the first molding structure, and there is a demolding gap between the opposite end faces of the first molding structure and the undercut portion of the base.

2. The mold core structure for molding automotive parts according to claim 1, characterized in that, The first molding structure includes: An inclined ejector is movably disposed within the first cavity of the first mold core; The inner wall of the first cavity is provided with a first inclined surface, and the inclined top member is provided with a second inclined surface that abuts against the first inclined surface.

3. The mold core structure for molding automotive parts according to claim 2, characterized in that, The inclined ejector is provided with a limiting part, and the second mold core is provided with a limiting protrusion located in the second cavity; The limiting part abuts against the limiting protrusion to restrict the movement of the inclined ejector relative to the first cavity during molding.

4. The mold core structure for molding automotive parts according to claim 3, characterized in that, The limiting part is a limiting recess formed by the indentation on the inclined top part.

5. The mold core structure for molding automotive parts according to any one of claims 1 to 4, characterized in that, The first molding structure is provided with a matching concave surface, which abuts against and is adapted to a portion of the second molding structure.

6. The mold core structure for molding automotive parts according to claim 1, characterized in that, The second molding structure includes: The first core-pulling component is rotatably connected to the first mold core, and the first core-pulling component is provided with a first arc portion; The second core-pulling component is rotatably connected to the first mold core. The second core-pulling component has a second arc portion, and there is a gap between the first arc portion and the second arc portion to form a cavity. The cavity is used to form the undercut bending area of ​​the base. A drive assembly includes a transmission unit and a drive unit, wherein the transmission unit is configured to be movable, the first core-pulling member and the second core-pulling member are both drive-connected to the transmission unit, and the drive unit is drive-connected to the transmission unit. The drive unit drives the transmission unit to move, and the first core-pulling component and the second core-pulling component rotate synchronously.

7. The mold core structure for molding automotive parts according to claim 6, characterized in that, The second molding structure also includes: A mounting shaft is provided on the first mold core, and both the first core-pulling component and the second core-pulling component are rotatably sleeved on the mounting shaft.

8. The mold core structure for molding automotive parts according to claim 6 or 7, characterized in that, The transmission unit includes: A movable component, configured to be movable, the movable component being drive-connected to the drive unit, the movable component being provided with a drive ramp; A first transmission component, one end of which is rotatably connected to the moving component, and the other end of which is rotatably connected to the first core-pulling component; The second transmission component has one end abutting against and slidably engaging with the transmission inclined surface, and the other end being movably connected to the second core-pulling component.

9. The mold core structure for molding automotive parts according to claim 8, characterized in that, One of the first mold core and the second transmission component has a guide protrusion along its height direction, and the other of the first mold core and the second transmission component has a guide groove along its height direction that is slidably connected to the guide protrusion.

10. An injection molding machine, characterized in that, The invention includes an injection mold and a mold core structure for molding automotive parts as described in any one of claims 1 to 9, wherein the mold core structure is disposed on the injection mold.

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