A mold core pulling device and a product mold

Abstract

The utility model discloses a kind of mould core-pulling device and product mould, mould core-pulling device includes driving part, slider assembly, guide structure, fixed core-pulling part and movable core-pulling part, driving part is fixedly arranged in the fixed mould side of mould, slider assembly is slidably arranged in the movable mould side of mould, and with driving part driving connection, to be driven by driving part when opening mould and move along first direction, fixed core-pulling part is arranged on slider assembly and moves synchronously with it, movable core-pulling part is connected with guide structure, guide structure is arranged on slider assembly, and be configured as: when slider assembly moves along first direction, drive movable core-pulling part moves along second direction different from first direction.The utility model only uses one driving part, through guide structure, single driving action is synchronously decomposed into two different direction core-pulling movements.Directly reduce the number of driving source, simplify mould structure, reduce the space occupation demand to mould.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a mold core pulling device and a product mold. Background Technology

[0002] In the field of injection molding, especially for complex plastic products, mold design often faces the challenge of tight product space. Traditional core-pulling methods typically require independent drive sources for each core-pulling direction, such as multiple inclined guide pillars or hydraulic cylinders. This results in complex mold structures, large size, high costs, and long processing cycles. When local space is limited, traditional methods struggle to achieve multi-component coordinated core pulling, failing to meet the requirements of short product development cycles and low costs in modern products. Utility Model Content

[0003] In view of this, the present invention provides a mold core pulling device and a product mold, which can realize the synchronous control of multiple moving parts by one drive source within a limited space.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a mold core-pulling device. The mold core-pulling device includes a driving component, a slider assembly, a guide structure, a fixed core-pulling component, and a movable core-pulling component. The driving component is fixedly disposed on the fixed mold side of the mold. The slider assembly is slidably disposed on the moving mold side of the mold and is drivenly connected to the driving component so that it is driven to move along a first direction during mold opening. The fixed core-pulling component is disposed on the slider assembly and moves synchronously with it. The movable core-pulling component is connected to the guide structure, which is disposed on the slider assembly and configured to drive the movable core-pulling component to move along a second direction different from the first direction when the slider assembly moves along the first direction.

[0005] In some embodiments, the slider assembly includes a slider seat, and the fixed core-pulling member is fixed on the slider seat; the guide structure is an inclined guide groove disposed on the slider assembly, and the movable core-pulling member is provided with a guide portion that cooperates with the inclined guide groove. The inclined guide groove cooperates with the guide portion so that when the slider seat moves, it pushes the guide portion through the groove wall of the inclined guide groove, thereby driving the movable core-pulling member to move.

[0006] In some embodiments, the fixing core-pulling component includes a first fixing core-pulling component and a second fixing core-pulling component, the first fixing core-pulling component and the second fixing core-pulling component being fixed side by side to the top surface of the slider seat by fasteners; the inclined guide groove is a trapezoidal groove formed on the second fixing core-pulling component.

[0007] In some embodiments, the moving mold side of the mold is provided with a guide groove adapted to the shape of the movable core-pulling component, which is used to constrain the movable core-pulling component to move only in the second direction; the head configuration of the movable core-pulling component matches the internal snap-fit ​​of the product.

[0008] In some embodiments, the driving component is an inclined guide post, and the slider seat has a guide post hole that cooperates with the inclined guide post.

[0009] In some embodiments, the mold core-pulling device further includes a return spring disposed between the slider assembly and the moving mold side, the return spring providing an elastic auxiliary force to the slider seat in the mold opening direction.

[0010] In some embodiments, the mold core-pulling device further includes a limiting block fixed to the moving mold side of the mold, the limiting block being positioned at the end of the sliding block's mold opening movement path, so as to limit its backward travel by contacting the sliding block.

[0011] In some embodiments, the first direction is a horizontal direction and the second direction is a vertical direction; the slider seat is driven to reset by the driving member in the mold closing state, and the movable core-pulling member rises and resets accordingly.

[0012] According to another aspect of this application, an embodiment of the present invention provides a product mold, the product mold including the above-described mold core-pulling device.

[0013] In some embodiments, the product mold has an internal undercut, and the mold core-pulling device is configured to release the internal undercut.

[0014] Compared with the prior art, the mold core-pulling device of this utility model has at least the following beneficial effects: The mold core-pulling device provided by this utility model includes a driving component, a slider assembly, a guide structure, a fixed core-pulling component, and a movable core-pulling component. The driving component is fixedly disposed on the fixed mold side of the mold. The slider assembly is slidably disposed on the moving mold side of the mold and is drivenly connected to the driving component so that it is driven by the driving component to move along a first direction when the mold is opened. The fixed core-pulling component is disposed on the slider assembly and moves synchronously with it. The movable core-pulling component is connected to the guide structure. The guide structure is disposed on the slider assembly and is configured to drive the movable core-pulling component to move along a second direction different from the first direction when the slider assembly moves along the first direction.

[0015] The most significant improvement of this invention lies in using only one driving component. Through the ingenious design of the guiding structure, a single driving action is synchronously decomposed into two core-pulling movements in different directions. This directly reduces the number of driving sources, simplifies the mold structure, and reduces the space requirements of the mold, making it possible to achieve multi-directional core pulling in compact product designs. This effectively addresses the challenges of short product development cycles and strict cost control.

[0016] The product mold provided by this utility model is designed based on the above-mentioned mold core pulling device. Its beneficial effects are the same as those of the above-mentioned mold core pulling device, and will not be repeated here.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a mold core-pulling device in the mold-opening state, provided by an embodiment of this utility model; Figure 2 This is a cross-sectional view of a mold core-pulling device provided in an embodiment of the present invention when the core-pulling is completed; Figure 3 This is a cross-sectional view of a mold core-pulling device provided in an embodiment of the present invention when it is in the middle of the mold opening state; Figure 4 This is an exploded perspective view of the moving mold side in a mold core-pulling device provided by an embodiment of this utility model; Figure 5 This is a cross-sectional view of the moving mold side in a mold core-pulling device provided by an embodiment of this utility model; Figure 6 This is an exploded plan view of the moving mold side in a mold core-pulling device provided by an embodiment of this utility model; Figure 7 This is a cross-sectional view of the moving mold side from another angle in a mold core-pulling device provided by an embodiment of this utility model; Figure 8 yes Figure 1 Enlarged view of the middle mold side; Figure 9 yes Figure 1 Enlarged view of the moving part of the mold; Figure 10 This is a cross-sectional view of the cooperation between a fixed core-pulling component and a movable core-pulling component in a mold core-pulling device provided by an embodiment of this utility model; Figure 11 This is a cross-sectional view of a sliding seat in a mold core-pulling device provided by an embodiment of this utility model; Figure 12 This is a cross-sectional view of the sliding seat in a mold core-pulling device provided by an embodiment of the present invention, taken from another direction.

[0020] in: 1. Driving component; 2. Slider assembly; 21. Guide post hole; 3. Guide structure; 4. Fixed core-pulling component; 41. First fixed core-pulling component; 42. Second fixed core-pulling component; 5. Movable core-pulling component; 51. Guide part; 6. Fastener; 7. Guide groove; 8. Return spring; 9. Limit block. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0022] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1 In the description of this utility model, it is necessary to clearly distinguish two types of guide grooves with different functions: one is the inclined guide groove (or stepped groove) as a "motion conversion mechanism", which is set on the slider assembly and decomposes the linear motion of the driving member through the inclined surface, and is used to actively drive the movable core pulling member to change the direction of motion; the other is the guide groove as a "motion constraint mechanism", which is set on the moving mold side and is used to constrain the movable core pulling member, so that it can only move along the preset direction, without providing active driving force.

[0025] This embodiment provides a mold core-pulling device, such as... Figures 1-12 As shown, the mold core-pulling device includes a driving component 1, a slider assembly 2, a guide structure 3, a fixed core-pulling component 4, and a movable core-pulling component 5. The driving component 1 is fixedly disposed on the fixed mold side of the mold. The slider assembly 2 is slidably disposed on the moving mold side of the mold and is drivenly connected to the driving component 1 so that it is driven by the driving component 1 to move along a first direction when the mold is opened. The fixed core-pulling component 4 is disposed on the slider assembly 2 and moves synchronously with it. The movable core-pulling component 5 is connected to the guide structure 3. The guide structure 3 is disposed on the slider assembly 2 and is configured to drive the movable core-pulling component 5 to move along a second direction different from the first direction when the slider assembly 2 moves along the first direction.

[0026] The driving component 1 is fixedly mounted on the stationary mold side of the mold, while the slider assembly 2 is arranged on the moving mold side and is slidable. The driving component 1 and the slider assembly 2 are connected in a driving relationship, meaning that when the mold opens, the driving component 1 directly acts on the slider assembly 2 to make it move. The fixed core-pulling component 4 is directly mounted on the slider assembly 2, so it is fixedly connected to the slider assembly 2 and moves synchronously with it. The movable core-pulling component 5 is connected to the guide structure 3. In this embodiment, the guide structure 3 is mounted on the slider assembly 2. More specifically, this configuration allows the movement of the slider assembly 2 to be transmitted to the movable core-pulling component 5 through the guide structure 3, changing its direction of movement.

[0027] The core function of the driving component 1 is to provide initial power, actively driving the slider assembly 2 to begin movement during mold opening. The slider assembly 2 acts as a platform for carrying and transmitting power; it not only directly drives the fixed core-pulling component 4, but its own movement also drives the movable core-pulling component 5 indirectly through the guide structure 3 (slanted guide groove) on it. The guide structure 3 is crucial to the entire embodiment; it converts the linear motion of the slider assembly 2 along the first direction into the motion of the movable core-pulling component 5 along a different second direction, thus achieving a change in motion form. The fixed core-pulling component 4 directly acts on the product, solving the undercut demolding problem in one direction. The movable core-pulling component 5 solves the undercut demolding problem in the other direction; it works in conjunction with the fixed core-pulling component 4, but its movement trajectory is controlled by the guide structure 3.

[0028] When opening the mold, such as Figure 1 As shown, the fixed mold side and the moving mold side separate. The drive component 1, fixed to the fixed mold side, moves accordingly and pushes the slider assembly 2, causing it to slide in the first direction, i.e., the horizontal direction. Since the fixed core-pulling component 4 is fixed to the slider assembly 2, it moves horizontally along with it, thereby disengaging from the corresponding undercut structure on the product. At the same time, the movement of the slider assembly 2 is transmitted to the movable core-pulling component 5 through its own guide structure 3. The guide structure 3 converts the horizontal movement into a second direction movement, either vertical or inclined, forcing the movable core-pulling component 5 to move along this second direction, thereby disengaging from the undercut in another direction on the product. The entire process is synchronously driven by a single drive source, ultimately releasing all relevant snaps on the product for easy ejection.

[0029] The most significant improvement in this embodiment lies in using only one drive component 1. Through the ingenious design of the guide structure 3, a single driving action is synchronously decomposed into two core-pulling movements in different directions. This directly reduces the number of drive sources, simplifies the mold structure, and reduces the space requirements of the mold, making it possible to achieve multi-directional core pulling in compact product designs. This effectively addresses the challenges of short product development cycles and strict cost control.

[0030] In a specific embodiment, such as Figure 4 and Figure 5 As shown, the slider assembly 2 includes a slider seat, and the fixed core-pulling member 4 is fixed on the slider seat; the guide structure 3 is an inclined guide groove provided on the slider assembly, and the movable core-pulling member 5 is provided with a guide part that cooperates with the inclined guide groove. The inclined guide groove and the guide part 51 cooperate so that when the slider seat moves, it pushes the guide part 51 through the groove wall of the inclined guide groove, thereby driving the movable core-pulling member 5 to move.

[0031] The slider seat serves as the main load-bearing structure of the slider assembly 2, and the fixed core-pulling component 4 is directly mounted and fixed on the slider seat and moves synchronously with it. The inclined guide groove is a key feature formed on the slider seat itself; it is a channel with a specific inclination angle. The guide portion 51 is a protruding part on the movable core-pulling component 5, its shape matching and embedded within the inclined guide groove. The guide portion 51 is slidably nested inside the inclined guide groove of the slider seat, thereby connecting the movable core-pulling component 5 to the slider seat, but this connection allows relative movement rather than rigid fixation.

[0032] As the skeleton of the entire motion mechanism, the slider seat supports the fixed core-pulling component 4 on one hand, and provides a basis for the motion conversion of the movable core-pulling component 5 through its own inclined guide groove. The inclined guide groove is essentially a motion conversion mechanism; its inclined groove wall compresses and guides the guide part 51 when the slider seat moves. The guide part 51 serves as the interaction interface between the movable core-pulling component 5 and the inclined guide groove. It receives the thrust transmitted from the inclined guide groove and drives the entire movable core-pulling component 5 to move along the preset second direction.

[0033] During operation, when the drive unit 1 drives the slider assembly 2 to move along the first direction, the fixed core-pulling component 4, fixed on the slider seat, moves synchronously with it, completing the core-pulling action in one direction. Simultaneously, because the guide portion 51 is embedded in the inclined guide groove, the linear movement of the slider seat forces the groove wall to continuously push the guide portion 51. More specifically, because the inclined guide groove is inclined, this pushing decomposes the horizontal movement of the slider seat, thereby driving the guide portion 51 and the connected movable core-pulling component 5 to move along a second direction different from the first direction, such as the vertical direction, completing the core-pulling action in another direction. This coordination produces the effect of a single drive source synchronously controlling movements in two different directions, simplifying the mold structure. This method of motion conversion is compact, reliable, and solves the problem of achieving complex core-pulling actions within a limited mold space, reducing the manufacturing cost and complexity of the mold.

[0034] In a specific embodiment, such as Figure 3 , Figure 5 as well as Figure 6 As shown, the fixed core-pulling component 4 includes a first fixed core-pulling component 41 and a second fixed core-pulling component 42. The first fixed core-pulling component 41 and the second fixed core-pulling component 42 are fixed side by side to the top surface of the slider seat by fasteners 6. The inclined guide groove is a trapezoidal groove formed on the second fixed core-pulling component 42.

[0035] The first fixed core-pulling component 41 and the second fixed core-pulling component 42 are fixedly mounted side by side on the slider seat by fasteners 6, forming a whole core-pulling unit. This side-by-side fixing means that the first fixed core-pulling component 41 and the second fixed core-pulling component 42 are closely adjacent in space, and are connected by the slider seat and fasteners 6 to form a component that can move synchronously.

[0036] More specifically, they correspond to two specific fasteners on the product that require core pulling along the same direction, i.e., the first direction. In addition, the second fixed core-pulling component 42 also performs an additional crucial function: its body is machined with the aforementioned inclined guide groove, also known as a trapezoidal groove. This means that the second fixed core-pulling component 42 is not only a functional component performing the core-pulling action, but also a part of the guide structure 3, providing a guide track for the movement of the movable core-pulling component 5.

[0037] This embodiment integrates two core-pulling functional units by fixing the first fixed core-pulling component 41 and the second fixed core-pulling component 42 side-by-side, sharing a set of fasteners 6 and mounting positions, thus simplifying the structural layout of the top surface of the slider seat. Furthermore, the greatest advantage of this design is that the inclined guide groove is directly integrated into the second fixed core-pulling component 42, rather than being additionally machined on the slider seat. This results in a very compact structure, maximizing the use of valuable space within the mold. Simultaneously, because the guide channel is integrated with the core-pulling component, the number of parts is reduced, assembly complexity is lowered, and the rigidity and synchronization accuracy of the entire mechanism's movement are improved. Ultimately, the first fixed core-pulling component 41 and the second fixed core-pulling component 42, as a whole, efficiently and reliably complete the core-pulling task under the drive of the slider seat. The inclined guide groove integrated into the second fixed core-pulling component 42 ensures the synchronous and coordinated movement of the movable core-pulling component 5, together achieving the effect of solving complex core-pulling requirements with the simplest and most compact structure.

[0038] In a specific embodiment, such as Figure 1 and Figure 2 As shown, the moving mold side of the mold is provided with a guide groove 7 that matches the shape of the movable core-pulling part 5, which is used to constrain the movable core-pulling part 5 to move only in the second direction; the head configuration of the movable core-pulling part 5 matches the internal fastening of the product.

[0039] A guide groove 7 is specially provided on the moving mold side of the mold. The shape of the guide groove 7 matches and fits tightly with the contour of the movable core-pulling component 5. Its core function is to act like a precise track, strictly limiting the movement of the movable core-pulling component 5 to a preset second direction, preventing any unnecessary deviation or rotation during movement. Simultaneously, this embodiment also defines the head of the movable core-pulling component 5, that is, its end portion that directly contacts the product. Its shape is specially designed to perfectly match the shape of the specific snap-fit ​​part inside the product that needs to be disengaged. The combination of these two detailed features produces a very important effect. More specifically, the presence of the guide groove 7 ensures that the movement trajectory of the movable core-pulling component 5 is absolutely precise and stable. It will not be stuck or deviate from its direction due to lateral forces from the inclined guide groove, thereby guaranteeing the reliability and repeatability of the core-pulling action. Furthermore, the customized configuration of the five heads of the movable core-pulling component directly determines its functional success. Only when it perfectly matches the product's snap-fit ​​can the snap-fit ​​be accurately formed during injection molding and smoothly disengage from the complex snap-fit ​​without damaging the product during mold opening. These two features work together to ensure that the entire "one-to-two" core-pulling mechanism achieves a compact layout and synchronous movement, while also ensuring that each core-pulling action, especially the vertical core-pulling action, is completed with high quality and high reliability. This effectively molds and demolds products with complex internal undercuts, improving the practicality of the mold and the yield rate of the product.

[0040] In a specific embodiment, such as Figure 1 As shown, the driving component 1 is an inclined guide post, and the slider seat has a guide post hole 21 that cooperates with the inclined guide post.

[0041] The driving component 1 is an angled guide post, with a dedicated guide post hole 21 machined on the slider seat. The shape and angle of this hole precisely match the shaft of the angled guide post. When the mold opens and closes, the angled guide post smoothly inserts into or retracts from this guide post hole 21. This design produces a very significant effect. More specifically, the advantage of the angled guide post as a driving source lies in utilizing the opening and closing action of the mold template itself as power, eliminating the need for additional hydraulic or electrical systems, thereby simplifying the mold structure and control system and reducing manufacturing costs. The function of the guide post hole 21 is to provide a precise guide and force-bearing surface for the thrust of the angled guide post, ensuring that the angled guide post can accurately push the slider seat back to the working position when the mold is closed, and can also actuate the slider seat to begin its backward movement when the mold is opened. This fit ensures the directness and reliability of power transmission. The combination of the angled guide post and the guide post hole 21 provides a simple, low-cost, stable, and extremely durable driving solution for achieving complex "one-to-two" movements.

[0042] In a specific embodiment, the mold core-pulling device further includes a return spring 8, such as... Figure 1 and Figure 2As shown, the reset spring 8 is disposed between the slider assembly 2 and the moving mold side and provides the slider seat with an elastic auxiliary force in the mold opening direction.

[0043] The return spring 8 is positioned between the slider assembly 2 and the moving mold side of the mold. Its installation method ensures the spring is in a pre-compressed state, thereby continuously applying an elastic auxiliary force towards the mold opening direction to the slider seat. This force is aligned with the driving force of the drive component 1, helping to push the slider assembly 2 in a backward motion.

[0044] At the start of the mold opening action, the elastic potential energy stored in the return spring 8 is immediately released, providing an initial boost to the backward movement of the slider seat. This helps the entire mechanism start up faster and smoother, reducing the risk of action delays or jamming caused by static friction or mechanical resistance. This elastic auxiliary force works synergistically with the mechanical pushing force of the inclined guide post, essentially adding an extra layer of protection to the movement of the slider assembly 2. Even in some extreme cases where the driving force of the inclined guide post is slightly insufficient or the transmission is not smooth enough, the return spring 8 can ensure that the slider assembly 2 reliably retreats to the designated position. The addition of the return spring 8 improves the reliability, response speed, and stability of the entire "one-to-two" core pulling device, enabling each mold opening and core pulling action to be completed accurately and without error when dealing with high-paced continuous production.

[0045] In a specific embodiment, such as Figures 1-4 As shown, the mold core-pulling device also includes a limiting block 9, which is fixed to the moving mold side of the mold and its position corresponds to the end of the sliding block's mold opening movement path, so as to limit its backward stroke by contacting the sliding block.

[0046] The limiting block 9 is installed at a pre-calculated position on the moving mold side of the mold. This position is precisely the final point where the slider seat needs to stop after completing the mold opening and core pulling action. When the slider seat moves backward under the action of driving force, it directly abuts against this limiting block 9, thus being rigidly blocked from further retraction. This embodiment provides a reliable mechanical endpoint for the moving parts, ensuring that the retraction stroke of the slider seat is constant each time the mold opens. This directly guarantees that the fixed core pulling component 4 and the movable core pulling component 5 can accurately retract to a position sufficient for safe demolding each time. This not only fundamentally prevents product tearing or damage caused by insufficient retraction of the slider seat, but also avoids the risk of mechanical instability or collision caused by excessive retraction. Through this rigid limiting, the movement of the entire core pulling device becomes highly controllable and predictable.

[0047] In a specific embodiment, the first direction is the horizontal direction and the second direction is the vertical direction; the slider seat is driven to reset by the driving component 1 in the mold closing state, and the movable core-pulling component 5 rises and resets accordingly.

[0048] The main movement of the slider seat driven by the drive member 1 is along the horizontal direction, which is the first direction; while the movement of the movable core-pulling member 5 is limited to the vertical direction, which is the second direction. During mold closing, the drive member 1 pushes the slider seat forward along the horizontal direction to return to its initial position. This action is achieved through the cooperation of the inclined guide groove on the slider seat and the guide part 51 on the movable core-pulling member 5, forcing the movable core-pulling member 5 to move upward along the vertical direction, thus also returning to its working starting position. This embodiment clearly defines the geometric relationship of the entire mechanism's movement. The clear division of the horizontal and vertical directions makes the design intent of the mold structure clear and the spatial layout reasonable.

[0049] More specifically, decomposing the core-pulling action into horizontal and vertical directions enables efficient handling of complex snap-fits with different orientations on the product. The slider seat is driven to reset by the drive component 1 in the mold-closed state, and the movable core-pulling component 5 rises and resets accordingly, ensuring the integrity of the entire work cycle. The drive component 1 is responsible not only for the core-pulling drive during mold opening but also for the reset of all moving parts during mold closing, ensuring smooth operation of the next injection molding process.

[0050] The specific working process of the mold core-pulling device provided in Example 1 is as follows: The working process begins in the mold-closed injection state. At this time, the drive component 1, i.e., the inclined guide post, is fully inserted into the guide post hole 21 on the slider seat, and the return spring 8 is in a compressed state. The first fixed core-pulling component 41 and the second fixed core-pulling component 42 are fixed to the top surface of the slider seat by fasteners 6. The head of the movable core-pulling component 5 is embedded in the internal snap-fit ​​of the product, and its guide part 51 is embedded in the trapezoidal groove that serves as the inclined guide groove. At the same time, the body of the movable core-pulling component 5 is located in the guide groove 7 on the moving mold side. The entire mechanism is in the molding position.

[0051] When injection molding is complete and mold opening begins, such as Figure 2 and Figure 3 As shown, the fixed mold side and the moving mold side of the mold are separated. The inclined guide post fixed to the fixed mold side moves accordingly, pushing against the wall of the guide post hole 21 through its inclined surface, thereby driving the slider seat to move backward in the horizontal direction. At the same time, the compressed return spring 8 releases its elastic force, providing a continuous elastic auxiliary force for the backward movement of the slider seat, ensuring smooth start-up. The horizontal backward movement of the slider seat directly drives the first fixed core-pulling component 41 and the second fixed core-pulling component 42 fixed thereon to move horizontally in sync, causing them to disengage from the side fasteners of the product.

[0052] More specifically, as the slider seat retracts horizontally, the trapezoidal groove on the second fixed core-pulling member 42 also moves. Since the guide portion 51 of the movable core-pulling member 5 is embedded in the trapezoidal groove, and the body of the movable core-pulling member 5 is restricted to vertical movement within the guide slide 7, the inclined wall of the trapezoidal groove exerts a downward thrust on the guide portion 51. This thrust converts the horizontal movement of the slider seat into the vertical downward movement of the movable core-pulling member 5. The movable core-pulling member 5 then slides downward along the guide slide 7, disengaging its head from the snap-fit ​​inside the product.

[0053] Furthermore, driven by the inclined guide post and assisted by the return spring, the slider seat continues to retract until it contacts the limit block 9 fixed to the moving mold side, at which point the movement is forced to stop. At this point, both the fixed core-pulling component 4 and the movable core-pulling component 5 have completely detached from the product, all core-pulling actions are completed, the product is completely released, and can then be smoothly ejected by the ejection system. Figure 1 As shown.

[0054] During mold closing, the fixed mold side closes towards the moving mold side, the inclined guide post re-inserts into the guide post hole 21, and pushes the slider seat to overcome the elastic force of the return spring 8 and move forward horizontally to reset. The forward movement of the slider seat, through the cooperation of the trapezoidal groove and the guide part 51, pushes the movable core-pulling part 5 upward along the guide slide 7 until all parts accurately return to the initial position of mold closing and injection molding, ready for the next injection cycle. The entire process is driven by an inclined guide post, realizing the synchronous linkage of core-pulling actions in both horizontal and vertical directions.

[0055] Example 2 This embodiment provides a product mold, which includes the mold core-pulling device described in Embodiment 1.

[0056] Since the mold core-pulling device described in Embodiment 1 uses a driving component 1, such as an inclined guide post, as a single power source, and synchronously controls the slider assembly 2 to drive the fixed core-pulling component 4 and the movable core-pulling component 5 to move in different directions, the overall layout of the product mold is optimized, reducing the structural complexity and space occupation caused by traditional multiple driving sources, thereby effectively reducing the mold manufacturing cost and development time.

[0057] In a specific embodiment, the product mold has an internal undercut, and the mold core-pulling device is configured to release the internal undercut.

[0058] The product mold is designed for products with internal undercut structures, and the core-pulling device is specifically designed to remove these internal undercuts. The molded plastic products often have internal recesses or interlocking structures that are difficult to demold directly—these are the internal undercuts. To address this challenge, the core-pulling device is specially configured. Its core feature is that the head of the movable core-pulling component 5 is precisely designed to perfectly match the shape of the internal undercut, and moves vertically during mold opening guided by the guide structure 3. This targeted design is highly effective, directly solving the demolding problem of complex products with internal undercuts.

[0059] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A mold core-pulling device, characterized in that, The mold core-pulling device includes a driving component, a slider assembly, a guide structure, a fixed core-pulling component, and a movable core-pulling component. The driving component is fixedly disposed on the fixed mold side of the mold. The slider assembly is slidably disposed on the moving mold side of the mold and is drivenly connected to the driving component so that it is driven by the driving component to move along a first direction when the mold is opened. The fixed core-pulling component is disposed on the slider assembly and moves synchronously with it. The movable core-pulling component is connected to the guide structure. The guide structure is disposed on the slider assembly and is configured to drive the movable core-pulling component to move along a second direction different from the first direction when the slider assembly moves along the first direction.

2. The mold core-pulling device according to claim 1, characterized in that, The slider assembly includes a slider seat, and the fixed core-pulling component is fixed on the slider seat; the guide structure is an inclined guide groove provided on the slider assembly, and the movable core-pulling component is provided with a guide part. The inclined guide groove cooperates with the guide part so that when the slider seat moves, it pushes the guide part through the groove wall of the inclined guide groove, thereby driving the movable core-pulling component to move.

3. The mold core-pulling device according to claim 2, characterized in that, The fixed core-pulling component includes a first fixed core-pulling component and a second fixed core-pulling component, which are fixed side by side to the top surface of the slider seat by fasteners; the inclined guide groove is a trapezoidal groove formed on the second fixed core-pulling component.

4. The mold core-pulling device according to claim 3, characterized in that, The moving mold side of the mold is provided with a guide groove that matches the shape of the movable core-pulling component, which is used to constrain the movable core-pulling component to move only in the second direction; the head configuration of the movable core-pulling component matches the internal fastening part of the product.

5. The mold core-pulling device according to claim 2, characterized in that, The driving component is an inclined guide post, and the slider seat has a guide post hole that cooperates with the inclined guide post.

6. The mold core-pulling device according to claim 2, characterized in that, The mold core-pulling device also includes a return spring, which is disposed between the slider assembly and the moving mold side and provides the slider seat with an elastic auxiliary force in the mold opening direction.

7. The mold core-pulling device according to claim 5, characterized in that, The mold core-pulling device also includes a limiting block, which is fixed to the moving mold side of the mold and its position corresponds to the end of the sliding block's mold opening movement path, so as to limit its backward stroke by contacting the sliding block.

8. The mold core-pulling device according to claim 2, characterized in that, The first direction is horizontal, and the second direction is vertical; the slider seat is driven to reset by the drive component in the mold-closed state, and the movable core-pulling component rises and resets accordingly.

9. A product mold, characterized in that, The product mold includes the mold core-pulling device as described in any one of claims 1-8.

10. The product mold according to claim 9, characterized in that, The product mold has an internal undercut, and the mold core-pulling device is configured to release the internal undercut.

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