Core-pulling ejection structure of a mold

Abstract

The application discloses a core-pulling ejection structure of a mold, which comprises a deep rib cavity, a core-pulling module and a delayed ejection module. The deep rib cavity is suitable for demolding along a first direction. The core-pulling module and the delayed ejection module are arranged on a first sliding block on the periphery of the deep rib cavity. The core-pulling module comprises a core column and a second sliding block. The core column is movably arranged on the first sliding block along a second direction. The core column and the second sliding block are connected. The core column is suitable for moving with the second sliding block and entering or leaving the deep rib cavity. The first sliding block and the second sliding block are both connected with an upper mold. The second sliding block is suitable for moving with the upper mold in advance of the first sliding block, so that the core column is suitable for leaving the deep rib cavity before the first sliding block moves. A part of the delayed ejection module extends to the deep rib cavity. When the first sliding block moves along the first direction, the delayed ejection module and the upper mold remain relatively fixed in the first direction. The application has the characteristics of stable demolding. The core-pulling action is combined with the demolding action, and the core-pulling is completed before demolding, so that the demolding effect is ensured.

Description

Technical Field

[0001] This application relates to the field of mold equipment technology, specifically to a core-pulling and ejection structure for a mold. Background Technology

[0002] Molds are various molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, molds are tools used to make shaped objects. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the shape of the object by changing the physical state of the material being molded.

[0003] However, the existing mold demolding process has the following defects: In the production of automotive trim parts, there are often many complex deep rib undercut structures, especially deep rib undercut structures that require forming holes. Traditional molds have difficulty in dealing with the demolding process of these deep rib undercut structures, which can easily cause structural interference and sticking problems, resulting in damage to the deep rib undercut structure and affecting the yield. Utility Model Content

[0004] One object of this application is to provide a core-pulling ejection structure for a mold with delayed core-pulling ejection.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a core-pulling and ejection structure for a mold, comprising a deep rib cavity, a core-pulling module, and a delayed ejection module. The deep rib cavity is connected to a cavity formed by the upper and lower molds. The deep rib cavity is adapted to be demolded along a first direction. The core-pulling module and the delayed ejection module are disposed on a first slider on the periphery of the deep rib cavity. The core-pulling module includes a core post and a second slider. The core post is movably disposed on the first slider along a second direction. The core post and the second slider are connected. The core post is adapted to move with the second slider and enter or leave the deep rib cavity. Both the first slider and the second slider are connected to the upper mold. The second slider is adapted to move with the upper mold before the first slider, so that the core post is adapted to leave the deep rib cavity before the first slider moves. A portion of the delayed ejection module extends to the deep rib cavity. When the first slider moves along the first direction, the delayed ejection module and the upper mold remain relatively fixed in the first direction.

[0006] In some embodiments, the delayed ejection module includes at least one first ejection device, which is movable relative to the first slider in a first direction. The first ejection device includes a first ejector rod and a first elastic resetter. The first ejector rod is movably disposed on the first slider in the first direction. A portion of the tip of the first ejector rod extends to the deep rib cavity. The tip of the first ejector rod is adapted to abut against the deep rib structure formed by the deep rib cavity at least in the first direction. The first elastic resetter is adapted to move the tip of the first ejector rod toward the direction closer to the first slider.

[0007] In some embodiments, a portion of the tip of the first push rod extends into the cavity.

[0008] In some embodiments, the upper mold is provided with a limiting surface on the side of the first slider away from the cavity. The limiting surface intersects with a first direction. The upper mold and the lower mold move closer to each other or away from each other along a third direction. The limiting surface is parallel to the third direction. The other end of the ejector device is adapted to abut against the limiting surface. When the upper mold and the lower mold move closer to each other or away from each other, the ejector device and the limiting surface remain in contact.

[0009] In some embodiments, one end of the second slider extends outward from the first slider and is provided with a first inclined portion, and the upper mold is provided with a second inclined portion. The first inclined portion and the second inclined portion are adapted to slide in a combination direction of the third and fourth directions.

[0010] In some embodiments, a bevel pin is further included, the bevel pin being disposed on the upper mold, at least a portion of the bevel pin protruding from the surface of the upper mold and being configured as the second inclined portion. When the core post disengages from the deep rib cavity, the bevel pin is adapted to disengage from the first inclined portion after the core post disengages from the deep rib cavity and before the first slider moves with the upper mold. The upper mold is provided with an inclined protrusion on the side of the first inclined portion away from the second inclined portion, the inclined protrusion being adapted to contact the first inclined portion when the upper mold is closed and to push the first inclined portion to move in a first direction.

[0011] In some embodiments, the upper mold and the first slider are respectively provided with inclined guide posts and inclined holes, the inclined guide posts and the inclined holes are connected in cooperation, the upper mold is adapted to make the first slider slide through the inclined guide posts and the inclined holes, and the width of the inclined holes in the first direction is greater than the diameter of the inclined guide posts in the first direction.

[0012] In some embodiments, the second slider is slidably disposed along the fourth direction, the bottom of the core column is provided with a third inclined portion, and the second slider is provided with a fourth inclined portion, the third inclined portion and the fourth inclined portion being adapted to be slidably connected in the combined direction of the second direction and the fourth direction.

[0013] In some embodiments, the second slider is provided with a telescopic pin, which is disposed on the second slider along the sliding direction of the second slider. The telescopic pin is adapted to extend out of the second slider and is adapted to abut against the first slider to limit the length of the core column entering the deep rib cavity.

[0014] In some embodiments, a limiting pin is provided on the second slider and a limiting groove is provided on the first slider. The limiting pin and the limiting groove are connected in a cooperating manner. The limiting groove is adapted to restrict the movement of the limiting pin in the fourth direction.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The core-pulling and ejection structure of the mold in this application sets up a core-pulling module and a delayed ejection module, and designs the sequence of the core-pulling action of the core-pulling module and the ejection action of the delayed ejection module, so that the core-pulling action and the ejection action can be triggered step by step with a delay during the mold opening process of the upper mold, thereby reducing the structural interference and sticking problem of deep rib cavities during the demolding process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the arrangement of the core-pulling module according to a preferred embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the state before mold opening according to a preferred embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the initial state of mold opening according to a preferred embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the state after mold opening according to a preferred embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the engagement of the first slider and the upper mold according to a preferred embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the arrangement of the first ejection device according to a preferred embodiment of this application.

[0022] Figure 7 This is a schematic diagram showing the connection between the core-pulling module and the first slider according to a preferred embodiment of this application.

[0023] In the diagram: 1. Upper mold; 11. Inclined guide post; 12. Limiting surface; 13. Bend pin; 131. Second inclined part; 14. Inclined protrusion; 2. Lower mold; 3. First slider; 31. Deep rib cavity; 32. Inclined hole; 4. Cavity; 5. Core pulling module; 51. Core post; 511. Third inclined part; 52. Second slider; 521. First inclined part; 522. Fourth inclined part; 523. Telescopic pin; 5231. Pin shaft; 5232. Pin sleeve; 5233. Pin post; 524. Limiting pin; 53. Limiting groove; 6. Delayed ejection module; 61. First ejection device; 611. First ejector rod; 612. First elastic reset device. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "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 application 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 application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] The following description, in conjunction with the accompanying drawings, further illustrates this application: like Figures 1 to 7As shown, this application provides a delayed core-pulling ejection mold, including an upper mold 1, a lower mold 2, and a first slider 3. When the upper mold 1 and the lower mold 2 are closed, the upper mold 1, the lower mold 2, and the first slider 3 cooperate to form a cavity 4. The cavity 4 is suitable for molding structural parts such as automotive trim parts. The first slider 3 has a deep rib cavity 31 that communicates with the cavity 4. The first slider 3 moves along a first direction (see reference). Figures 2 to 4 As shown in the x-direction setting, when the mold is opened, the first slider 3 is adapted to move away from the upper mold 1 and the lower mold 2 along the first direction, so that the deep rib cavity 31 is separated from its formed deep rib structure.

[0029] In this application, the deep rib structure needs to have connecting holes to facilitate the installation and connection of automotive trim parts. In traditional molds, core pillars 51 are generally set to form connecting holes. However, the core pillars 51 increase the difficulty of the deep rib structure detaching from the deep rib cavity 31. This application sets a core-pulling module 5 to integrate the core pillars 51. The action of the core-pulling module 5 can pull the core pillars 51 out of the deep rib cavity 31, thereby reducing the structural interference of the core pillars 51 on the deep rib structure detaching from the deep rib cavity 31, reducing the demolding difficulty, and improving the demolding smoothness.

[0030] The core-pulling module 5 is disposed on the first slider 3. The core-pulling module 5 includes a core post 51 and a second slider 52. The core post 51 is movably disposed on the first slider 3 along a second direction. The second direction is set according to the depth of the hole opening direction on the deep rib structure. The core post 51 and the second slider 52 are connected. The core post 51 is adapted to move with the second slider 52 and enter or leave the deep rib cavity 31. The deep rib cavity 31 and the core post 51 are adapted to cooperate in forming a deep rib structure with holes. The first slider 3 is adapted to move along the first direction so that the deep rib structure and the deep rib cavity 31 are separated. The first slider 3 and the second slider 52 are both connected to the upper mold 1. The second slider 52 is adapted to move with the upper mold 1 before the first slider 3 so that the core post 51 is adapted to leave the deep rib cavity 31 before the first slider 3 moves.

[0031] It is understandable that by associating the action states of the first slider 3 and the second slider 52 with the action state of the upper mold 1, the mold of this application can simultaneously demold the core pillar 51 and the first slider 3 by relying solely on the opening and closing actions of the upper mold 1, without the need for additional or external equipment. This effectively reduces the difficulty and complexity of mold opening and closing. Furthermore, to avoid structural interference between the demolding of the core pillar 51 and the first slider 3, the connection between the first slider 3 and the upper mold 1 is optimized to create a demolding delay between them. This ensures that the core pillar 51 has sufficient time and displacement to complete demolding before the action of the first slider 3, thereby reducing the probability of damage to the deep rib mechanism and achieving more stable and high-quality demolding.

[0032] like Figure 5In the embodiment shown, the opening and closing direction of the upper mold 1 and the lower mold 2 is the third direction (refer to...). Figures 2 to 4 As shown in the y-direction), the upper mold 1 and the first slider 3 are respectively provided with inclined guide post 11 and inclined hole 32. The inclined guide post 11 and inclined hole 32 are connected in a cooperative manner. The inclined direction of the inclined guide post 11 and inclined hole 32 is located between the first direction and the third direction. The upper mold 1 is adapted to make the first slider 3 slide through the cooperation between the inclined guide post 11 and the inclined hole 32. The width of the inclined hole 32 in the first direction is greater than the diameter of the inclined guide post 11 in the first direction. When the inclined guide post 11 moves along the third direction, its position in the first direction is adapted to change. Due to the size design between the inclined guide post 11 and the inclined hole 32, the inclined guide post 11 will not contact the side of the inclined hole 32 within a certain stroke, so that the linkage between the upper mold 1 and the first slider 3 can obtain a period of idle stroke. The core pulling module 5 can use this idle stroke to realize the core pulling action, and the first slider 3 can also use this idle stroke to realize delayed demolding.

[0033] In some embodiments, the inclined guide post 11 and the inclined hole 32 form an angle α with the third direction, where 0° < α < 90°.

[0034] In some embodiments, a delayed ejection module 6 is provided on the first slider 3. The delayed ejection module 6 includes at least one ejection device, which is in the form of a push rod. The ejection device is movable relative to the first slider 3 at least in a first direction. The top end of the ejection device is adapted to extend to the cavity 4 and / or the deep rib cavity 31. The ejection device and the upper mold 1 are kept relatively fixed at least in the first direction. When the first slider 3 moves along the first direction, the top end of the ejection device is adapted to move away from the first slider 3 along the first direction. The ejection device can assist the structural components in the cavity 4 to separate from the first slider 3, or the deep rib structure in the deep rib cavity 31 to separate from the deep rib cavity 31 of the first slider 3, thereby reducing the occurrence of mold sticking and improving the quality of the product. Since the slider opens and demolds along the first direction, the ejection device must be able to generate relative displacement with the first slider 3 at least in the first direction, which is achieved by the upper mold 1 fixing the ejection device.

[0035] In some embodiments, the delayed ejection module 6 includes multiple ejection devices, which are respectively arranged at positions where mold demolding is difficult, thereby enhancing demolding stability.

[0036] like Figure 6In the illustrated embodiment, the upper mold 1 is provided with a limiting surface 12 on the side of the first slider 3 away from the cavity 4. The limiting surface 12 intersects with the first direction (i.e., the limiting surface 12 and the first direction only overlap at one point, excluding the parallel and overlapping states). The upper mold 1 and the lower mold 2 move closer or further away from each other along the third direction. The limiting surface 12 is parallel to the third direction, which can prevent the limiting surface 12 from pushing the ejection device in the first direction during the movement of the upper mold 1, so as to ensure the stability of the ejection state of the ejection device. The other end of the ejection device is adapted to abut against the limiting surface 12. When the upper mold 1 and the lower mold 2 move closer or further away from each other, the ejection device and the limiting surface 12 remain in contact. The limiting surface 12 can ensure the position of the ejection device in the first direction, so that during the demolding process of the first slider 3, the ejection device always maintains contact with the structure inside the cavity 4, thereby allowing the structure to detach from the first slider 3 and preventing the structure from moving with the first slider 3.

[0037] like Figure 6 In the embodiment shown, the upper mold 1 has a slot and a limiting surface 12 is provided. At least part of the ejector device is adapted to be accommodated in the slot where the limiting surface 12 is located, which can improve the compactness of the mold and further improve the stability of the cooperation between the ejector device and the limiting surface 12.

[0038] like Figures 1 to 4 In the embodiment shown in Figure 6, at least one ejection device is a first ejection device 61. The first ejection device 61 includes a first ejector rod 611 and a first elastic resetter 612. The first ejector rod 611 is movably disposed on the first slider 3 in a first direction. A portion of the top end of the first ejector rod 611 extends to the deep rib cavity 31. The top end of the first ejector rod 611 is adapted to abut against the deep rib structure at least in the first direction. The first elastic resetter 612 is adapted to move the top end of the first ejector rod 611 toward the direction closer to the first slider 3. It can be understood that the first ejection device 61 is mainly used to eject the deep rib structure. Therefore, it needs to form structural interference with the deep rib structure in the first direction. When the first slider 3 moves, it can effectively restrict the deep rib structure from following the movement of the first slider 3, so that the deep rib structure and the deep rib cavity 31 can separate from each other and reduce the occurrence of sticking.

[0039] The first elastic resetter 612 is used to push the top end of the first ejector 611 close to the first slider 3 during the upper mold 1 process, and ensure that the top end of the first ejector 611 and the first slider 3 are tightly connected to each other to form the cavity 4 surface and the deep rib cavity 31 surface, thereby achieving automatic reset and improving production quality.

[0040] In some embodiments, the first push rod 611 abuts against the central axis of the deep rib structure, making the force more uniform during the separation of the deep rib structure and the deep rib cavity 31, and reducing the probability of damage to the deep rib structure during demolding.

[0041] In some embodiments, a portion of the top end of the first ejector rod 611 extends to the deep rib cavity 31, and simultaneously, a portion of the top end of the first ejector rod 611 extends to the cavity 4, so that the first ejector rod 611 can simultaneously push the structure at the cavity 4 and the deep rib structure in the deep rib cavity 31 to separate, thereby dispersing and evenly distributing the force and improving the smoothness and quality of demolding the deep rib structure.

[0042] In some embodiments, the first elastic resetter 612 is a spring.

[0043] In some embodiments, the number of first elastic resetters 612 is one, and the first elastic resetter 612 is nested around the periphery of the first push rod 611, resulting in a more compact structure.

[0044] In some embodiments, there are two first elastic resetters 612, which are symmetrically arranged on both sides of the first push rod 611, resulting in higher and more stable reset strength.

[0045] like Figures 2 to 4 In the illustrated embodiment, one end of the second slider 52 extends to the outside of the first slider 3 and is provided with a first inclined portion 521. The upper mold 1 is provided with a second inclined portion 131. The first inclined portion 521 and the second inclined portion 131 are adapted to slide in a combination direction of the third and fourth directions, thereby connecting the mold opening action of the upper mold 1 with the sliding action of the second slider 52. When the first inclined portion 521 and the second inclined portion 131 are in contact, the mold opening distance of the upper mold 1 and the sliding distance of the second slider 52 are directly proportional.

[0046] like Figures 1 to 4 In the illustrated embodiment, considering the high production difficulty of directly forming the second inclined portion 131 on the upper mold 1, a groove can be made on the upper mold 1, and a bevel pin 13 can be provided. At least a portion of the bevel pin 13 protrudes from the surface of the upper mold 1 and serves as the second inclined portion 131, which can be easily replaced and maintained. When the core post 51 is separated from the deep rib cavity 31, the bevel pin 13 is suitable to separate from the first inclined portion 521 after the core post 51 is separated from the deep rib cavity 31 and before the first slider 3 moves with the upper mold 1 (before the inclined guide post 11 and the inclined hole 32 come into contact in the first direction). When the bevel pin 13 is separated from the first inclined portion 521, the core pulling action of the core post 51 ends, and the mold opening action of the upper mold 1 will no longer affect the core post 51 and the second slider 52, thereby reducing and limiting the range of motion of the core post 51 and the second slider 52, making the arrangement space of the core post 51 and the second slider 52 more compact, convenient for arrangement, and reducing the mold volume.

[0047] like Figures 1 to 4In the embodiment shown in Figure 7, the upper mold 1 is provided with an inclined protrusion 14 on the side of the first inclined portion 521 away from the second inclined portion 131. The inclined protrusion 14 is adapted to contact the first inclined portion 521 when the upper mold 1 closes the mold and push the first inclined portion 521 to move along the first direction, so that the mold can automatically close and reset, reducing the difficulty and complexity of operation.

[0048] like Figures 1 to 4 In the illustrated embodiment, the second slider 52 is slidably disposed along the fourth direction, the bottom of the core column 51 is provided with a third inclined portion 511, and the second slider 52 is provided with a fourth inclined portion 522. The third inclined portion 511 and the fourth inclined portion 522 are adapted to be slidably connected in the combined direction of the second and fourth directions, thereby connecting the mold opening action of the upper mold 1 with the sliding of the core column 51. When the third inclined portion 511 and the fourth inclined portion 522 remain in contact, the mold opening distance of the upper mold 1 and the sliding distance of the core column 51 are directly proportional.

[0049] In some embodiments, the third inclined portion 511 is an inclined T-shaped groove, and the fourth inclined portion 522 is an inclined T-shaped protrusion. The combination of the two can achieve higher structural strength and sliding stability, ensuring that the core post 51 can be stably pulled out and reducing shaking.

[0050] like Figures 2 to 4 In the embodiment shown in Figure 7, a telescopic pin 523 is provided on the second slider 52. The telescopic pin 523 is provided on the second slider 52 along the sliding direction of the second slider 52. The telescopic pin 523 is adapted to extend out of the second slider 52 and is adapted to abut against the first slider 3 to limit the length of the core column 51 entering the deep rib cavity 31.

[0051] In some embodiments, the telescopic pin 523 includes a pin shaft 5231, a pin sleeve 5232, and a pin post 5233. The pin shaft 5231 is disposed at the front end of the pin sleeve 5232, the pin sleeve 5232 is adapted to be inserted from the front end of the second slider 52, and the pin post 5233 is adapted to be inserted from the rear end of the second slider 52. The pin post 5233 and the pin sleeve 5232 are adapted to be threadedly connected. The pin shaft 5231 is adapted to move axially along the pin sleeve 5232 to limit the initial position of the second slider 52. It can be understood that by adjusting the position of the pin shaft 5231, the depth to which the core post 51 extends into the deep rib cavity 31 can be indirectly affected. Considering that a multi-stage structure is formed between the core post 51, the second slider 52, and the core post 51... The linkage and dimensional accuracy need to be considered. If the movable space of the second slider 52 is set too small, the core 51 may not be able to accurately form the through hole of the deep rib structure. If the movable space of the second slider 52 is set too large, the core 51 may impact the deep rib cavity 31 during the process of the second slider 52 driving the core 51 to reset, which may accelerate the wear and damage of the deep rib cavity 31 and reduce the mold life. Therefore, in order to ensure the positional accuracy of the core 51 in the deep rib cavity 31, a margin can be set for the movable space of the second slider 52, and then the initial position of the second slider 52 can be finely adjusted by setting an adjustable pin 5231 to achieve precise matching between the core 51 and the deep rib cavity 31.

[0052] In some embodiments, the pin 5231 has a certain elasticity, which can play a certain buffering role when the second slider 52 is reset, thus protecting the structure of the first slider 3 and the second slider 52.

[0053] like Figures 2 to 4 In the embodiment shown in Figure 7, a limiting pin 524 is provided on the second slider 52, and a limiting groove 53 is provided on the first slider 3. The limiting pin 524 and the limiting groove 53 are connected in cooperation. The limiting groove 53 is suitable for restricting the movement of the limiting pin 524 in the fourth direction. The function of the limiting pin 524 is to stabilize and strengthen the sliding connection between the second slider 52 and the first slider 3, and to limit the sliding distance of the second slider 52, so as to facilitate the reset of the second slider 52.

[0054] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are only the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope of this application. All such changes and modifications fall within the scope of this application as claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A core-pulling and ejection structure for a mold, characterized in that: The device includes a deep rib cavity, a core-pulling module, and a delayed ejection module. The deep rib cavity is connected to a cavity formed by the upper and lower molds. The deep rib cavity is adapted for demolding along a first direction. The core-pulling module and the delayed ejection module are disposed on a first slider on the periphery of the deep rib cavity. The core-pulling module includes a core post and a second slider. The core post is movably disposed on the first slider along a second direction. The core post and the second slider are connected. The core post is adapted to move with the second slider and enter or leave the deep rib cavity. Both the first slider and the second slider are connected to the upper mold. The second slider is adapted to move with the upper mold before the first slider, so that the core post is adapted to leave the deep rib cavity before the first slider moves. A portion of the delayed ejection module extends to the deep rib cavity. When the first slider moves along the first direction, the delayed ejection module and the upper mold remain relatively fixed in the first direction.

2. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: The delayed ejection module includes at least one first ejection device, which is movable relative to the first slider in a first direction. The first ejection device includes a first ejector rod and a first elastic resetter. The first ejector rod is movably disposed on the first slider in the first direction. A portion of the top end of the first ejector rod extends to the deep rib cavity. The top end of the first ejector rod is adapted to abut against the deep rib structure formed by the deep rib cavity at least in the first direction. The first elastic resetter is adapted to move the top end of the first ejector rod toward the direction closer to the first slider.

3. The core-pulling and ejection structure of a mold as described in claim 2, characterized in that: A portion of the tip of the first push rod extends into the cavity.

4. The core-pulling and ejection structure of a mold as described in claim 2, characterized in that: The upper mold has a limiting surface on the side of the first slider away from the cavity. The limiting surface intersects with the first direction. The upper mold and the lower mold move closer to each other or away from each other along the third direction. The limiting surface is parallel to the third direction. The other end of the ejector device is adapted to abut against the limiting surface. When the upper mold and the lower mold move closer to each other or away from each other, the ejector device and the limiting surface remain in contact.

5. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: One end of the second slider extends to the outside of the first slider and is provided with a first inclined portion. The upper mold is provided with a second inclined portion. The first inclined portion and the second inclined portion are adapted to slide in a combination direction of the third and fourth directions.

6. The core-pulling and ejection structure of a mold as described in claim 5, characterized in that: It also includes a bevel pin, which is disposed on the upper mold. At least a portion of the bevel pin protrudes from the surface of the upper mold and is configured as the second inclined portion. When the core post disengages from the deep rib cavity, the bevel pin is adapted to disengage from the first inclined portion after the core post disengages from the deep rib cavity and before the first slider moves with the upper mold. The upper mold is provided with an inclined protrusion on the side of the first inclined portion away from the second inclined portion. The inclined protrusion is adapted to contact the first inclined portion when the upper mold is closed and push the first inclined portion to move in a first direction.

7. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: The upper mold and the first slider are respectively provided with inclined guide posts and inclined holes. The inclined guide posts and the inclined holes are connected in cooperation. The upper mold is adapted to make the first slider slide through the inclined guide posts and the inclined holes. The width of the inclined holes in the first direction is greater than the diameter of the inclined guide posts in the first direction.

8. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: The second slider is slidably disposed along the fourth direction, the bottom of the core column is provided with a third inclined portion, and the second slider is provided with a fourth inclined portion. The third inclined portion and the fourth inclined portion are adapted to be slidably connected in the combined direction of the second direction and the fourth direction.

9. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: The second slider is provided with a telescopic pin, which is disposed on the second slider along the sliding direction of the second slider. The telescopic pin is adapted to extend out of the second slider and is adapted to abut against the first slider to limit the length of the core column entering the deep rib cavity.

10. The core-pulling and ejection structure of a mold as described in claim 1, characterized in that: The second slider is provided with a limiting pin, and the first slider is provided with a limiting groove. The limiting pin and the limiting groove are connected in cooperation. The limiting groove is adapted to restrict the movement of the limiting pin in the fourth direction.

Images