Slide running delay mechanism for a mold

Abstract

The utility model provides a slider running delay mechanism for mould relates to air conditioning production technical field, and the mould includes the template and the first slider that can move relative to the template, and the slider running delay mechanism includes stop piece, movable element, biasing member and actuating element, stop piece is fixed on the template, movable element is movably arranged on the first slider, and the moving direction of movable element is with the moving direction of first slider intersection, biasing member is arranged on the first slider, is used for in the mold opening process, drives movable element to move to the locking position that happens mechanical interference with stop piece, actuating element is arranged on the template, is used for in the mold closing process, drives movable element to move to the unlocking position that does not happen mechanical interference with stop piece. Utilize biasing member and actively drive movable element to move to the locking position that cooperates with stop piece in the mold opening, forms the initiative locking of pre -tightening, recovers to the unlocking position that does not produce interference again using actuating element in the mold closing, movable element overcomes biasing force.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning production technology, and in particular to a slider running delay mechanism for molds. Background Technology

[0002] In injection mold design, the slider mechanism is a common technical solution for molding products with undercut structures such as side grooves or holes. For some large products with complex structures, it is often necessary to nest one or more secondary sliders (or small sliders) on a main slider (or large slider). The main and secondary sliders are controlled by different driving components to pull the core in a preset sequence, so as to achieve smooth demolding of complex undercut structures.

[0003] In existing technologies, when the driving component moves the nested secondary slider to perform a core-pulling motion, significant friction is generated between the secondary and primary sliders. For large molds, the sliders have a large weight and contact area, and this friction is sufficient to unexpectedly drag the primary slider to move synchronously with the secondary slider. This unexpected linkage disrupts the preset demolding sequence, which may lead to abnormal stretching of the undercut area of ​​the product, resulting in quality defects such as whitening, stress marks, or even cracking. On the other hand, it also requires the driving component that drives the secondary slider (such as a thin, angled guide post) to bear an additional huge load while dragging the primary slider, which can easily lead to overload and breakage, causing mold damage and production interruption.

[0004] To address this issue, the industry has proposed several solutions to delay slider movement. For example, a fixed clamping block can be placed on the template moving relative to the slider, and a corresponding fixed boss can be placed on the slider. In the initial stage of mold opening, the vertical surface of the clamping block blocks the vertical surface of the boss, preventing the slider from moving horizontally. However, such solutions have the following drawbacks: This purely geometric interference is a passive locking mechanism, as it does not apply an active locking force. For the large and dynamically changing drag force generated by friction, its locking reliability is insufficient, and it may fail due to wear and tear after long-term operation. Secondly, the fixed boss on the slider is always at risk of scraping or colliding with the template or clamping block during the high-speed mold closing process. This accelerates the wear of parts, affects the smoothness of mold closing, and reduces the overall durability of the mechanism.

[0005] Therefore, existing slider delay technology needs to be improved to overcome its shortcomings. Summary of the Invention

[0006] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a slider running delay mechanism for molds. This slider running delay mechanism for molds sets a fixed stop and an actuator on the template, and sets a movable movable part and a biasing part that provides biasing force on the first slider. When the mold is opened, the biasing part actively drives the movable part to move to the locking position that cooperates with the stop, forming a pre-tight active lock. Then, when the mold is closed, the actuator forces the movable part to overcome the biasing force and return to the unlocked position that does not cause interference. This overcomes the problems of unreliable locking effect and easy interference and wear of the structure in the prior art slider delay mechanism when the mold is closed.

[0007] A slider operation delay mechanism for a mold, the mold including a template and a first slider movable relative to the template, the slider operation delay mechanism comprising: The stop is fixed to the template; A movable component is movably disposed on the first slider, and the direction of movement of the movable component intersects the direction of movement of the first slider; An offset member, disposed on the first slider, is used to drive the movable member to a locked position where it mechanically interferes with the stop member during the mold opening process; An actuator, disposed on the template, is used to drive the movable part to an unlocked position during the mold closing process, where it does not mechanically interfere with the stop.

[0008] Furthermore, the mold also includes a second slider; The second slider is disposed on the first slider, and the second slider can slide relative to the first slider; The slider operation delay mechanism is used to lock the first slider during the period when the second slider moves relative to the first slider.

[0009] In nested slider structures, the key issue to be addressed is the frictional drag force generated by the second slider on the first slider during its movement. By applying the delay mechanism described in this application to the first slider, the active locking directly counteracts this frictional force, ensuring that the preset demolding sequence of the second slider moving first and the first slider moving last is strictly executed. This not only effectively avoids quality problems such as product whitening and cracking caused by disordered sequence, but also protects the components driving the second slider (such as small inclined guide pillars) from overload damage caused by dragging the first slider.

[0010] Furthermore, the template includes a fixed mold side and a moving mold side; Both the first slider and the second slider are located on the moving mold side; The moving mold side is also provided with a first driving part and a second driving part; The first driving unit is used to drive the second slider to move relative to the first slider during the first stroke phase of mold opening; The second drive unit is used to drive the first slider to move during the second stroke phase of mold opening.

[0011] The first and second drive units drive the second and first sliders respectively at different stages of the mold opening stroke. A slider operation delay mechanism ensures that the first slider is reliably locked during the first stroke when the first drive unit is operating, and reliably unlocks before or at the start of the second stroke to coordinate with the second drive unit. This collaborative design enables the entire complex multi-slider, staged-drive demolding system to operate precisely and systematically, improving the accuracy and stability of the entire mold automation operation.

[0012] Furthermore, the slider operation delay mechanism also includes a limiting member, which is fixed to the first slider and is used to limit the movement endpoint of the movable member under the drive of the bias member, so as to keep the movable member in the locked position.

[0013] Compared to a moving part driven solely by an offset component, the addition of a limiting component brings two significant improvements. First, the limiting component provides a precise and stable endpoint for the moving part, ensuring it stops accurately at the preset locking position each time. This maintains a constant interference between the moving part and the stop component, making the locking effect more stable and repeatable. Second, it enhances structural strength and durability. The limiting component withstands the impact force of the moving part driven by the offset component and restricts its range of motion, effectively preventing the moving part from detaching or being damaged due to excessive ejection. It also protects the offset component from overstretching, thereby improving the overall structural robustness and long-term reliability of the mechanism.

[0014] Furthermore, the moving direction of the movable component is perpendicular to the moving direction of the first slider.

[0015] This feature represents a geometric optimization of the locking structure. Compared to an inclined intersection, the vertical arrangement ensures that the direction of the blocking force exerted by the stop on the moving part is completely opposite to the direction the first slider attempts to move. This orthogonal configuration of forces enables the most efficient transmission of locking force, achieving the strongest locking effect with minimal structural stress, and fundamentally eliminating the risk of component forces or slippage that may result from the presence of an angle. This maximizes the efficiency of the mechanical locking mechanism and further enhances the rigidity and reliability of the lock.

[0016] Furthermore, the first slider is provided with a receiving cavity for accommodating the movable member and the biasing member, and the movable member slides along the inner wall of the receiving cavity.

[0017] Integrating the moving parts and offset parts within the receiving cavity is an integrated and modular design. It provides guidance and protection; the inner wall of the receiving cavity can directly serve as a guide rail for the moving parts, ensuring smooth and straight movement, while protecting internal components from external dust, debris, and accidental impacts, thus improving operational reliability. It also makes the entire delay mechanism more compact, without occupying extra space outside the slider, facilitating the arrangement of the overall mold structure.

[0018] Furthermore, the biasing element is an elastic element.

[0019] By using elastic elements (such as springs) as biasing components, the entire delay mechanism becomes a purely mechanical, self-contained system, eliminating the need for external pneumatic or hydraulic power sources. This greatly simplifies the structural design and manufacturing of the mold, reduces costs, and ensures long-term, maintenance-free, reliable operation of the delay mechanism due to the extremely long fatigue life and stable performance of the elastic elements.

[0020] Furthermore, the elastic element is a helical spring; The helical spring is disposed within the receiving cavity, and the two ends of the helical spring respectively abut against the movable member and the receiving cavity; The helical spring is used to drive the movable part to the locked position by extension tension.

[0021] Coil springs are standardized, readily available, and have well-defined performance parameters, making them inexpensive. Positioning them between the bottom of the housing and the moving part directly provides axial thrust in the same direction as the moving part's movement, resulting in the highest force transmission efficiency and the simplest structure. This mature and concise design ensures that the offset function can be achieved with minimal cost, convenient assembly, and stable performance.

[0022] Furthermore, the movable component is a pivot component, which can rotate about a pivot relative to the first slider; The locking position is when the pivot member rotates to the position where it engages with the stop member; The unlocking position is when the pivot is rotated to a position where it is separated from the stop.

[0023] Compared to linearly translating moving parts, pivoting parts achieve locking and unlocking through rotational motion. This design may be more advantageous in certain mold space layouts; for example, when the space on the slider for mounting a delay mechanism is narrow or irregular, pivoting parts may be easier to arrange. Furthermore, through the lever principle, pivoting parts can also amplify force or convert stroke. This provides mold designers with another effective option for handling different working conditions.

[0024] Furthermore, the biasing element is a torsion spring; The torsion spring is mounted on the pivot of the pivot member, and the two ends of the torsion spring respectively abut against the pivot member and the first slider; The torsion spring is used to drive the pivot member toward the locked position by providing torque.

[0025] Torsion springs are specifically designed to provide torque, and their operation is perfectly synchronized with the rotational motion of the pivot, enabling the pivot to be driven to the locked position most directly and efficiently. This high degree of matching between the drive method and the motion method provides advantages such as rapid response and reliable operation.

[0026] The beneficial effects of this utility model are as follows: This utility model provides a slider operation delay mechanism for molds. This mechanism includes a movable movable part driven by an offset member and an actuator that resets it during mold closing. When the mold is about to close, the actuator on the template contacts the movable part. The actuator presses against the movable part, which overcomes the driving force of the offset member and moves to the unlocked position. Simultaneously, the offset member stores energy. This achieves an automatic avoidance function, ensuring smooth mold closing. When the mold opens, the template moves. After the actuator separates from the movable part, the offset member immediately releases energy, driving the movable part to move. The movable part's movement path is blocked by a stop. At this time, even if the embedded small slider starts to move and generates friction to try to drag the first slider, the first slider will be reliably locked by the rigid interlocking structure between the movable part and the stop, remaining stationary. The mold continues to open. When the template moves upward to a certain set stroke, the stop moves upward with the template and completely separates from the interference area of ​​the movable part, thereby releasing the lock on the first slider.

[0027] Due to the presence of the offset component, at the moment of mold opening, the moving part is actively pushed to the locking position and interferes with the stop component with a defined preload. The locking force provided by this active locking method more effectively resists the dragging force generated by friction in large sliders, thus ensuring the high reliability of the delayed locking. Due to the presence of the actuator, during mold closing, the moving part is forcibly pressed back to the unlocked position where no interference occurs. This automatic avoidance function reduces the risk of the locking structure colliding or scraping with the mold plate during high-speed mold closing, avoiding abnormal wear of the mechanism. Through the synergistic effect of active locking and automatic avoidance, the problems of unreliable locking and easy interference and wear in existing technologies are solved, improving the operational reliability and service life of the slider operation delay mechanism. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the panel product targeted by this utility model and the location of its defects.

[0029] Figure 2This is a three-dimensional schematic diagram illustrating the relationship between the product and the large and small sliders in the mold before improvement (i.e., without the mechanism of this utility model).

[0030] Figure 3 A schematic diagram of the cross-sectional structure of the front mold in the mold-closed state to improve it.

[0031] Figure 4 This is a schematic diagram of the mold provided in the embodiment of this utility model in the mold-closed state.

[0032] Figure 5 This is a schematic diagram of the mold provided in the embodiment of this utility model during the initial stage of mold opening.

[0033] Figure 6 This is a schematic diagram of the mold provided in the embodiment of this utility model during the intermediate stage of mold opening.

[0034] Figure 7 This is a schematic diagram of the mold provided in the embodiment of this utility model during the mold opening completion stage.

[0035] Figure 8 This is a schematic diagram of the overall layout in the mold provided in the embodiment of this utility model.

[0036] Figure 9 This is an exploded view of the relevant parts of the fixed mold part and the moving mold part provided in the embodiment of this utility model.

[0037] Figure label: 1. Product; 2. Second slider; 3. First slider; 4. Pressure block; 5. Spring for small slider; 6. Long limit pin; 7. First drive unit; 8. Locking block; 9. Wear-resistant block; 10. Second drive unit; 11. Fixed mold plate; 12. Fixed mold insert; 13. Moving mold plate; 14. Moving mold insert; 15. Actuator; 16. Stop; 17. Limiting element; 18. Moving element; 19. Offset element; 20. Limiting post; 21. Limiting pin; 22. Guide slider; 23. Pressure strip. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0039] Example 1 like Figures 1 to 9As shown, this embodiment provides a slider operation delay mechanism for a mold. This slider operation delay mechanism is applied in a typical injection mold, which includes a template and a first slider 3 capable of core-pulling relative to the template. The slider operation delay mechanism includes: Stop 16 is fixed to the template; The movable component 18 is movably disposed on the first slider 3, and the moving direction of the movable component 18 intersects with the moving direction of the first slider 3. The biasing member 19 is disposed on the first slider 3 and is used to drive the movable member 18 to a locked position that mechanically interferes with the stop member 16 during the mold opening process. Actuator 15, disposed on the template, is used to drive the movable part 18 to an unlocked position that does not mechanically interfere with the stop part 16 during the mold closing process.

[0040] In this embodiment, the stop 16 is specifically a precision-machined block. This block is securely mounted on the template using fasteners such as screws. Its core function is to provide a fixed and rigid physical barrier for the moving part 18 when the mold is in a specific mold opening stroke, forming a locking reference.

[0041] In this embodiment, the movable component 18 is specifically a limiting block that can move up and down within a pre-set cavity on the first slider 3. This limiting block is the key actuator for achieving dynamic locking. Its core design feature is that its direction of movement intersects with the direction of core pulling of the first slider 3; this geometric relationship is a prerequisite for forming an effective mechanical interlock.

[0042] In this embodiment, the biasing element 19 is specifically a spring. This spring is disposed on the first slider 3, located below the movable element 18, and constantly applies a continuous driving force to the movable element 18, pushing it toward the stop element 16. It is the power source for achieving active locking.

[0043] In this embodiment, the actuator 15 is specifically a rigid block. Like the stop 16, this rigid block is also fixedly mounted on the template. Its sole function is to provide an external force during the mold closing process by contacting the movable part 18 to overcome the driving force of the offset part 19 and reset the movable part 18.

[0044] This embodiment aims to solve the core problems of unreliable locking effect and easy interference and wear during mold closing in existing technologies' slider delay mechanisms. It transforms a static locking problem into a dynamic, automated mechanical process. The movable part 18 is designed to be movable because the locking function is only necessary in the initial stage of mold opening; during mold closing, any protruding locking structure could become a potential source of interference, scratches, and wear. Making it movable gives the locking structure the ability to extend when needed and retract when not needed.

[0045] The bias element 19 is introduced to achieve active locking. In large slider systems, passive geometric constraints alone may not be sufficient to completely counteract the enormous frictional drag forces. The continuous preload provided by the bias element 19 (such as a spring) ensures a zero-gap, preloaded rigid contact between the moving part 18 and the stop part 16, thereby achieving absolutely reliable locking and greatly improving the stability of the delay function.

[0046] Actuator 15 is designed to achieve automatic obstacle avoidance. Actuator 15 utilizes the closing action of the mold itself to automate the retraction action. In the final stage of mold closing, actuator 15 forcibly pushes the moving part 18 back, making the entire closing process smooth and unobstructed, fundamentally avoiding the risk of wear and collision, and ensuring the long-term durability of the mechanism.

[0047] In this embodiment, the working process of the slider operation delay mechanism is synchronized with the opening and closing cycle of the mold, and is specifically divided into the following two stages: Mold closing stage: As the mold begins to close, the template moves towards the first slider 3. Just before mold closing is complete, the actuator 15, fixed to the template, first contacts the movable member 18 on the first slider 3. As the mold continues to close, the actuator 15 presses downwards on the movable member 18, causing it to move downwards against the upward thrust provided by the lower bias member 19. When the mold is fully closed, the movable member 18 is completely pressed into its cavity within the first slider 3, reaching an unlocked position where it does not mechanically interfere with the stop member 16. During this process, the bias member 19 is compressed, storing mechanical energy as elastic potential energy.

[0048] Mold making stage: As the mold begins to open, the template moves away from the first slider 3. First, the actuator 15 separates from the movable part 18, releasing the pressure on the movable part 18. At the instant the pressure is released, the compressed offset part 19 immediately releases its stored energy, driving the movable part 18 upwards with a rapid motion. The movable part 18 moves upwards until its top is blocked by the lower surface of the stop 16, thus stopping precisely in the locked position. At this point, a strong mechanical interference is formed between the movable part 18 and the stop 16, firmly locking the position of the first slider 3. As the mold continues to open, the first slider 3 cannot move as long as the stop 16 and the movable part 18 remain in interference. When the mold opening stroke reaches the preset value, the stop 16, fixed to the template, moves upwards along with the template, eventually completely disengaging from the interference area with the movable part 18. At this point, the locking of the first slider 3 is automatically released, and the first slider 3 regains its freedom, allowing it to be driven by its own drive mechanism for core-pulling movement.

[0049] In addition to the preferred embodiments shown above, those skilled in the art can also make various modifications to the various components: The stop 16 and the actuator 15 do not have to be two separate parts. Their functions can be integrated into the same irregularly shaped block fixed to the template, which has both a locking surface for blocking and an actuating surface for pressing. Furthermore, its shape is not limited to a block shape; it can be a pin, a cam, or a specific contour machined directly onto the template.

[0050] The movement of the movable part 18 is not limited to linear translation. It can be designed as a pivot (such as a hook or lever) that rotates about an axis, and the engagement and disengagement with the stop part 16 are achieved by rotation.

[0051] For biasing element 19, although a helical spring is a cost-effective and reliable option, any element that can provide a continuous biasing force may be used, such as a leaf spring, a disc spring, or, where specific requirements dictate, a pneumatic, hydraulic, or magnetic assembly.

[0052] Example 2 like Figures 1 to 9 As shown, this embodiment provides a slider running delay mechanism for molds. Based on embodiment 1, this embodiment further demonstrates the specific deployment and operation of the slider running delay mechanism in a more complex and highly representative application scenario.

[0053] In this embodiment, the slider running delay mechanism is integrated into a complex injection mold with nested sliders and a segmented drive system.

[0054] The mold is generally divided into a fixed mold side and a moving mold side. The fixed mold side contains the fixed template, while the moving mold side supports the main core-pulling moving parts.

[0055] On the moving mold side of the mold, there is a first slider 3 with a larger volume and mass, and a relatively smaller second slider 2 is provided above (or inside) the first slider 3. The physical relationship of this design is that the movement of the second slider 2 must involve sliding relative to the first slider 3, and there is a large contact surface between the two.

[0056] To achieve orderly demolding of the two sliders, two independent driving components are provided on the moving mold side. One is the first driving unit 7, which is designed to drive the second slider 2 in the initial stage of mold opening; the other is the second driving unit 10, which is designed to contact and drive the first slider 3 in the later stage of mold opening. This design of the driving system fundamentally defines an expected working sequence: the second slider 2 must complete core pulling first, and then the first slider 3 can begin core pulling.

[0057] The stop 16 and actuator 15 of the slider running delay mechanism are fixedly installed on the template on the fixed mold side; while the moving part 18 and offset part 19 of the mechanism are integrated and installed on the first slider 3.

[0058] In existing technologies without this slider operation delay mechanism, the aforementioned nested slider and segmented drive system has a fatal design flaw. When the mold opens and the first drive unit 7 begins to drive the second slider 2, due to the enormous contact pressure and static friction between the second slider 2 and the first slider 3, this force acts as an unexpected dragging force on the first slider 3. For large molds, this frictional dragging force is sufficient to overcome the inertia of the first slider 3 itself and other resistances, causing the first slider 3 to be dragged along by the second slider 2, resulting in unexpected synchronous movement.

[0059] This synchronous movement will lead to two disastrous consequences: First, the preset demolding sequence of inside-outside is disrupted, causing the undercut area of ​​product 1 to be subjected to incorrect tensile force, which is very likely to cause stress whitening, deformation, or even cracking, rendering product 1 unusable. Second, the design load of the first drive unit 7 (usually a thinner inclined guide post) is only required to drive the second slider 2, but now it is forced to simultaneously drag the heavy first slider 3. This severe overload will quickly lead to fatigue, bending, or even breakage of the first drive unit 7, causing mold damage and production line shutdown.

[0060] Therefore, the design objective of this embodiment is to provide an absolutely reliable, temporary lock for the first slider 3 throughout the entire working time window of the first drive unit 7. The active locking force generated by the slider running delay mechanism through the bias member 19 ensures that its locking force is much greater than the maximum frictional drag force that may be generated when the second slider 2 moves, thereby forcing the first slider 3 to remain stationary and strictly ensuring that the preset demolding sequence is executed, thus fundamentally solving the two major problems of product 1 quality and mold damage.

[0061] In this embodiment, the collaborative workflow between the slider operation delay mechanism and the mold drive system is as follows: Initial mold opening, locking established: As the mold begins to open, the platen on the fixed mold side moves away from the moving mold side. The actuator 15 and the movable part 18 separate first, and the biasing member 19 immediately drives the movable part 18 to the locked position, forming a rigid interlock with the stop member 16. At this point, the first slider 3 is firmly locked and cannot move.

[0062] During the first stroke of mold opening, the second slider 2 moves: The mold continues to open, entering the first stroke stage. At this time, the first drive unit 7 begins to interact with the second slider 2, driving the second slider 2 to slide backward relative to the locked first slider 3, completing its independent core-pulling task. During this period, no matter how much friction is generated between the two, the first slider 3 remains completely still due to being locked by the mechanism of this invention.

[0063] Automatic unlocking during the transition period: After the second slider 2 completes its stroke, the mold continues to open. As the mold plate moves further away, the stop 16 fixed thereon eventually completely disengages from the interference area with the moving part 18. At this instant, the lock on the first slider 3 is automatically released, and the first slider 3 returns to its movable state.

[0064] In the second stroke stage of mold opening, the first slider 3 moves: The mold opens and enters the second stroke stage. At this time, the second drive unit 10, with a longer stroke, begins to contact the unlocked first slider 3 and drives it to slide backward, completing its core-pulling task.

[0065] Through the seamless connection of the above four steps, the mechanism ensures that the two sliders operate strictly in the logical sequence of locking the large slider, moving the small slider, unlocking the large slider, and moving the large slider again.

[0066] The nesting and driving methods described in this embodiment are typical, but not unique. The mechanism of this invention is also applicable to other equivalent systems: Alternatives to the drive units: The first drive unit 7 and the second drive unit 10 are not limited to using inclined guide pillars. In more advanced molds, they can be driven by independent hydraulic cylinders, pneumatic cylinders, or servo motors. In this case, the purely mechanical delay mechanism of this embodiment still has extremely high value, providing an intrinsically safe mechanical interlock that does not rely on an external control system, preventing motion errors that may be caused by control signal errors or delays.

[0067] The definition of stroke stages: The division of stroke stages is not limited to the geometric length of the drive components. By installing sensors such as limit switches and proximity switches on the mold, and combining them with the mold control system, the action windows of different drive components can be precisely defined. This mechanism can work in conjunction with these electronic control systems to provide an additional layer of reliable mechanical protection.

[0068] Example 3 like Figures 1 to 9 As shown, this embodiment provides a slider running delay mechanism for a mold. Based on embodiment 1, this embodiment further introduces a limiting member 17 and a geometric layout of the structure.

[0069] In addition to the stop 16, movable member 18, biasing member 19, and actuating member 15, the slider operation delay mechanism of this embodiment also includes a limiting member 17, which is specifically a pressure foot in this embodiment. This limiting member 17 is firmly fixed to the first slider 3 by screws or other means, and its position is precisely designed, with part of its structure extending above the movement path of the movable member 18. Its core function is to provide a physical, insurmountable end-point barrier for the movable member 18 as it moves upward under the drive of the biasing member 19.

[0070] In this embodiment, the moving direction of the movable part 18 (e.g., the vertical direction of mold opening and closing) is designed to be perpendicular to the core-pulling moving direction of the first slider 3 (e.g., the horizontal direction).

[0071] The purpose of adding a limiting element 17 is to ensure the accuracy and repeatability of positioning. Without the limiting element 17, the final stopping position of the moving part 18 would be determined solely by the free length of the offset element 19 and its contact with the stop element 16, which could result in slight variations due to performance fluctuations or assembly errors of the offset element 19. The limiting element 17 provides a fixed mechanical hard stop point, ensuring that the moving part 18 is driven to the exact same height in each mold opening cycle, thus accurately reaching the preset locking position. This high repeatability is crucial for ensuring a constant amount of interference between the moving part 18 and the stop element 16, forming the basis for stable and reliable locking. Secondly, it enhances the structural robustness and durability. When the offset element 19 drives the moving part 18, it gains a certain amount of kinetic energy. The limiting element 17 can stably withstand this impact, preventing the moving part 18 from tilting, jamming, or even dislodging due to excessive ejection. It also protects the offset element 19 from exceeding its elastic limit due to overstretching, thereby significantly improving the structural strength and service life of the entire mechanism.

[0072] The purpose of setting the directions of motion to be perpendicular is that when the first slider 3 attempts to move due to factors such as friction, it transmits a horizontal force to the moving part 18. Simultaneously, the stop 16 applies a counterforce to the moving part 18. When the lines of action of these two forces are perpendicular, the stopping force of the stop 16 can most effectively and without loss completely counteract the tendency of the first slider 3 to move. This orthogonal configuration avoids force components that might arise at other intersecting angles, which could generate additional friction or wedging effects between the mating surfaces of the moving part 18 and the first slider 3, thus affecting the smoothness and reliability of the locking. Therefore, the mutually perpendicular layout maximizes locking efficiency with the simplest structure, resulting in the most direct and stable locking effect.

[0073] The working process of the slider running delay mechanism in this embodiment is as follows: During the mold opening process, after the actuator 15 separates from the movable part 18, the offset member 19 drives the movable part 18 to move upward. Unlike the basic scheme, the upward movement of the movable part 18 is not unlimited, but stops immediately when its top contacts the limiting member 17 fixed on the first slider 3. This endpoint defined by the limiting member 17 is the precise locking position. Subsequently, as the mold continues to move, the stop member 16 on it will interfere with the precisely positioned movable part 18. Since the directions of their movement are perpendicular to each other, the vertical surface of the stop member 16 will cleanly block the vertical surface of the movable part 18, forming a highly rigid T-shaped interlock, thereby firmly locking the first slider 3. The subsequent automatic unlocking process is the same as in Embodiment 1.

[0074] The limiting member 17 can be implemented in various ways. It does not necessarily have to be a separately installed presser foot. For example, when machining the first slider 3, a step or shoulder structure can be directly machined on the top of the cavity for accommodating the movable member 18. This step or shoulder itself can serve as the limiting member 17, achieving the same function, and the structure is more integrated. Another approach is to provide a limiting screw or pin on the side wall of the first slider 3, with the end of the screw extending into a travel groove on the side of the movable member 18, thereby limiting the range of movement of the movable member 18 by the length of the groove.

[0075] While perpendicularity is the optimal choice from a mechanical standpoint, in special cases where the space of a mold structure is extremely limited, if a perfect perpendicular layout cannot be achieved, a near-perpendicular intersecting relationship with an angle greater than a certain value can be used. However, this is usually considered a compromise and may require corresponding reinforcement of the guide structure of the moving part 18 or the structural strength of the stop part 16 to compensate for the additional lateral forces caused by the non-perpendicular layout.

[0076] Example 4 like Figures 1 to 9As shown, this embodiment provides a slider operation delay mechanism for a mold. Based on embodiment 1, this embodiment further provides a preferred internal structure and specific implementation of the movable part 18 and the biasing part 19.

[0077] In this embodiment, the structure of the first slider 3 was optimized to achieve a compact, modular, and highly reliable mechanism. Specifically, a receiving cavity of predetermined depth and shape was machined into the first slider 3.

[0078] The core function of this receiving cavity is to serve as an integrated mounting base for simultaneously accommodating both the movable component 18 and the offset component 19. Its internal structure and component relationships are as follows: In this preferred embodiment, the biasing element 19 is an elastic element. More specifically, the elastic element is a standardized helical spring.

[0079] The helical spring is placed vertically at the bottom of the receiving cavity. The movable member 18 is positioned above the helical spring, with its lower surface abutting against the upper end of the helical spring. The external dimensions of the movable member 18 are precisely fitted to the inner wall of the receiving cavity, allowing the movable member 18 to slide stably along its inner wall within the receiving cavity.

[0080] Through this design, the movable part 18 and the helical spring that serves as its power source are cleverly integrated inside the first slider 3, forming a closed, independent modular unit.

[0081] The integrated design of the receiving cavity and helical spring is based on comprehensive considerations for the long-term stable operation of the mold. By embedding the moving part 18 and the helical spring inside the receiving cavity, they can be effectively protected from contamination by plastic powder and release agents, as well as accidental external impacts in the complex production environment of the mold. This fundamentally eliminates jamming or damage caused by external factors, significantly improving the operational reliability and service life of the mechanism.

[0082] The inner wall of the receiving cavity is not merely a simple receiving boundary; it also functions as a high-precision guide rail. By constraining the moving part 18 through the inner wall, it ensures that the moving part 18 maintains the correct posture during reciprocating motion, preventing tilting or wobbling. This precise guidance is a crucial prerequisite for the moving part 18 to stably and repeatedly move to the locked position and reliably engage with the stop part 16.

[0083] By using a helical spring as the elastic element, the entire slider delay mechanism becomes a purely mechanical system, eliminating the need for any external pneumatic, hydraulic, or other power sources and complex control pipelines. This greatly simplifies the overall design and manufacturing of the mold and reduces production costs. Furthermore, the helical spring, as a technologically mature, stable, and inexpensive standardized component, ensures the economic efficiency and ease of maintenance of this solution.

[0084] The helical spring is placed directly below the movable part 18, so that its axial extension direction is completely consistent with the movement direction of the movable part 18. This coaxial arrangement is the most efficient solution for force transmission, ensuring that the thrust generated by the helical spring can act directly on the movable part 18 without loss or component force, making its response rapid and its action crisp.

[0085] The working mechanism of the slider running delay mechanism in this embodiment is as follows: During mold closing, when the actuator 15 presses down on the movable part 18, the movable part 18 slides downward along the inner wall of the receiving cavity and directly compresses the helical spring below it. The helical spring is compressed, its length decreases, and the mechanical work is converted into elastic potential energy and stored.

[0086] When the mold opens, after the actuator 15 separates from the movable part 18, the elastic potential energy stored in the helical spring is released, causing it to elongate. The force of this elongation directly pushes the movable part 18 to slide upward along the inner wall of the receiving cavity until it reaches the locked position, thus completing the active locking action.

[0087] Although this embodiment provides a highly optimized solution, other feasible alternatives exist for different design requirements: The receiving cavity does not have to be a circular blind hole; it can be designed as a rectangular slot to accommodate the equally rectangular movable part 18. This design can provide additional anti-rotation functionality. Alternatively, the receiving cavity can be designed as a through hole, sealed by a removable base plate. This design may facilitate the inspection or replacement of the internal coil spring.

[0088] While a coil spring is preferred, the biasing element 19 can also be other types of elastic elements. For example, in applications requiring extremely high locking force but with a short stroke, a stack of disc springs can be used instead of a coil spring. In certain specific applications requiring a cushioning effect, even a piece of highly elastic polyurethane rubber (urethane rubber) can be used as the elastic element.

[0089] Example 5 like Figures 1 to 9 As shown, this embodiment provides a slider running delay mechanism for a mold. Based on embodiment 1, this embodiment further elaborates on the structure and movement of the movable part 18 and its associated components.

[0090] In this embodiment, the movable component 18 is no longer a slider that moves up and down, but is designed as a pivot component. This pivot component can be understood as a lever, a hook, or a locking lever, which rotates around a pivot fixed on the first slider 3.

[0091] In order to drive the pivot to rotate, the bias member 19 in this embodiment uses a torsion spring. This torsion spring is usually sleeved on the pivot of the pivot, with one end abutting against the fixed part of the first slider 3 and the other end acting on the pivot, thereby continuously applying a torque to the pivot, causing it to tend to rotate toward the locked position.

[0092] The stop 16, fixed to the template, needs to match the rotation trajectory of the pivot. For example, if the pivot is a hook, the stop 16 can be a pin or a groove that can be securely engaged when the pivot is rotated into position.

[0093] The actuator 15, fixed to the template, functions to push a specific part of the pivot to overcome the torque of the torsion spring. For example, it can be a cam or an inclined plane that, during mold closing, forces the pivot to rotate to the unlocked position by contacting the other arm or a specific surface of the pivot.

[0094] The adoption of a rotary pivoting mechanism is primarily to provide a design option distinct from linear mechanisms, adapting to more diverse and demanding mold design environments. Linear mechanisms require sufficient vertical space within the first slider 3 to accommodate the stroke of the moving part 18 and the length of the offset part 19 (coil spring). However, in some mold designs, the first slider 3 may be very flat, with extremely limited vertical space but relatively ample horizontal space. In such cases, a low-profile rotary pivoting mechanism can be more easily installed, solving the problem of the inability to install linear mechanisms.

[0095] Rotary pivot components can utilize the lever principle. By rationally designing their lever arm length, a small actuator force 15 can be used to drive the pivot component to generate a large locking force; or a shorter actuator stroke 15 can be used to achieve a longer stroke at the locking end of the pivot component. This mechanical amplification effect provides additional degrees of freedom in the design of the mechanism.

[0096] The movement trajectory of a pivoting component is an arc. This arc motion may be more advantageous than linear motion in some complex situations where it is necessary to avoid other mold parts.

[0097] Although the internal motion patterns differ, the synchronization relationship between its external triggering logic and the mold opening and closing remains consistent with that of Example 1: Mold Closing Stage: As the mold closes, the template moves toward the first slider 3. The actuator 15, fixed to the template, contacts the driven arm of the pivot. As the mold continues to close, the actuator 15 pushes the driven arm, forcing the entire pivot to rotate around its pivot axis. This rotation overcomes the torque applied by the torsion spring and rotates the locking end of the pivot (e.g., the rocker hook) to a fully retracted, unlocked position that does not interfere with the stop 16. During this process, the torsion spring is further tightened, storing torsional potential energy.

[0098] During the mold opening stage: As the mold opens and the template moves away from the first slider 3, the actuator 15 first separates from the driven arm of the pivot. At the moment of separation, the tightened torsion spring immediately releases energy, generating a restoring torque that drives the pivot to rotate rapidly in the opposite direction. The locking end of the pivot swings out along its arc until it securely engages or contacts the stop 16 fixed to the template, thus reaching the locked position. At this point, the first slider 3 is reliably locked. As the mold continues to open, the stop 16 moves along with the template, eventually disengaging from the pivot's rotation range, and the lock is automatically released.

[0099] In this embodiment, the biasing element 19 does not necessarily have to be a torsion spring. A linear helical spring or a leaf spring can also be used to push or pull one arm of the pivot, which can also generate a torque to rotate it and achieve the same biasing purpose. In addition to the engagement of the hook and the pin, it can also be designed that a toothed pivot engages with a rack-and-pinion stop 16, or an eccentric wheel-shaped pivot engages with a planar stop 16 through frictional self-locking. These different engagement forms can provide locking effects with different strengths and characteristics.

[0100] Example 6 Reference Figures 1 to 9 This embodiment aims to solve a quality problem caused by a disordered demolding sequence during the injection molding process of a panel product 1. For example... Figure 1 As shown, the panel body product 1 is prone to defects such as deformation, whitening, or even cracking at the central heat dissipation hole position.

[0101] Reference Figure 2 and Figure 3The mold structure of Product 1 adopts a nested slider design. Specifically, the moving mold part of the mold has a first slider 3 (i.e., the large slider) and a second slider 2 (i.e., the small slider), where the second slider 2 is installed inside the first slider 3 and is used to form the central heat dissipation hole of Product 1. The first slider 3 is used to form the outer structure of the heat dissipation hole. The fixed mold part of the mold has a shorter first drive part 7 (i.e., the small inclined guide post) and a longer second drive part 10 (i.e., the large inclined guide post). The ideal demolding sequence is: when the mold opens, the small inclined guide post first drives the second slider 2 to retreat, and after the second slider 2 is completely demolded, the large inclined guide post then drives the first slider 3 to retreat. However, in actual production, the huge friction force generated when the second slider 2 moves will unexpectedly drag the first slider 3 to retreat synchronously, disrupting the demolding sequence, thus leading to Figure 1 The product shown has a defect that frequently causes the small inclined guide post to break due to overload.

[0102] To address the aforementioned problems, this embodiment provides a slider operation delay mechanism. Please refer to... Figure 4 , Figure 8 and Figure 9 The components of the mechanism are respectively installed in the fixed mold part and the moving mold part of the mold.

[0103] The fixed mold part mainly includes a fixed mold plate 11, on which a stop block as a stop member 16 and a hard block as an actuator 15 are fixedly installed.

[0104] The moving mold section mainly includes a first slider 3, on which the core moving component of the delay mechanism is integrated. Specifically, a receiving cavity perpendicular to the slider core-pulling direction is formed on the body of the first slider 3. Inside the cavity is a limiting block serving as a moving part 18, and a helical spring serving as a biasing part 19. The spring is located below the limiting block and continuously applies an upward pushing force to it. At the opening of the receiving cavity, a pressure foot serving as a limiting part 17 is fixed by screws to limit the highest position of the limiting block's upward ejection.

[0105] Combination Figures 4 to 7 The complete workflow of the slider operation delay mechanism is as follows: 1. Mold closed state (refer to) Figure 4 ): With the mold fully closed, the hard block on the fixed mold plate 11 presses down on the limiting block on the first slider 3, causing it to overcome the spring force and retract to the bottom of the receiving cavity. At this time, the limiting block is in the unlocked position, and its height is lower than the interference area of ​​the stop block. The spring is compressed in this state, storing elastic potential energy.

[0106] 2. Initial mold opening and locking of the first slider 3 (refer to...) Figure 5 ): As the mold begins to open, the fixed mold plate 11 separates from the moving mold section. The hard block then disengages from the limiting block. The instant the pressing force disappears, the compressed spring immediately extends, rapidly ejecting the limiting block upwards until it is stopped by the upper pressure foot. At this point, the limiting block has moved to the locked position, its backward path firmly blocked by the stop block, which has not yet fully moved away. Simultaneously, the small inclined guide post begins to drive the second slider 2 backwards. Because the first slider 3 is rigidly locked by the stop block and the limiting block, it remains stationary regardless of the frictional drag force generated by the second slider 2.

[0107] 3. The second slider 2 completes the core pulling (refer to...) Figure 6 ): The mold continues to open, and the small inclined guide post drives the second slider 2 to complete the entire retraction and core-pulling stroke. Throughout this process, the stop block always interferes with the limit block, and the locked state of the first slider 3 is maintained, thus strictly ensuring the demolding sequence of "small first, then large".

[0108] 4. Unlocking and moving the first slider 3 (refer to...) Figure 7 ): As the mold opening stroke increases further, the stop block on the fixed platen 11 will eventually move completely upward, disengaging from the interference area with the limit block. At the moment of disengagement, the lock on the first slider 3 is automatically released. Immediately afterwards, the longer-stroke large inclined guide post begins to contact the unlocked first slider 3 and drives it to move smoothly backward until it completes its core-pulling task.

[0109] Through the series of automated locking and unlocking actions described above, the slider operation delay mechanism of this embodiment forcibly realizes the precise sequential movement of the inner and outer sliders in a purely mechanical manner, fundamentally solving the problems of product 1 whitening, cracking, and breakage of the inclined guide post, and significantly improving the stability of production and the pass rate of product 1.

[0110] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0111] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0112] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slider running delay mechanism for a mold, characterized in that, The mold includes a template and a first slider (3) movable relative to the template, the slider running delay mechanism including: The stop (16) is fixed to the template; A movable component (18) is movably disposed on the first slider (3), and the moving direction of the movable component (18) intersects with the moving direction of the first slider (3); An offsetting element (19) is provided on the first slider (3) and is used to drive the movable element (18) to a locking position that mechanically interferes with the stop element (16) during the mold opening process. An actuator (15) is provided on the template and is used to drive the movable part (18) to an unlocked position that does not mechanically interfere with the stop part (16) during the mold closing process.

2. The slider running delay mechanism for a mold according to claim 1, characterized in that: The mold also includes a second slider (2); The second slider (2) is disposed on the first slider (3), and the second slider (2) can slide relative to the first slider (3); The slider operation delay mechanism is used to lock the first slider (3) during the movement of the second slider (2) relative to the first slider (3).

3. The slider running delay mechanism for a mold according to claim 2, characterized in that: The template includes a fixed mold side and a moving mold side; The first slider (3) and the second slider (2) are both located on the moving mold side; The moving mold side is also provided with a first driving part (7) and a second driving part (10); The first drive unit (7) is used to drive the second slider (2) to move relative to the first slider (3) during the first stroke stage of mold opening; The second drive unit (10) is used to drive the first slider (3) to move during the second stroke stage of mold opening.

4. The slider running delay mechanism for a mold according to any one of claims 1 to 3, characterized in that: The slider operation delay mechanism further includes a limiting member (17), which is fixed on the first slider (3) and is used to limit the moving end point of the movable member (18) under the drive of the bias member (19) and keep the movable member (18) in the locked position.

5. The slider running delay mechanism for a mold according to any one of claims 1 to 3, characterized in that: The moving direction of the movable part (18) is perpendicular to the moving direction of the first slider (3).

6. The slider running delay mechanism for a mold according to any one of claims 1 to 3, characterized in that: The first slider (3) is provided with a receiving cavity, which is used to receive the movable member (18) and the biasing member (19), and the movable member (18) slides along the inner wall of the receiving cavity.

7. The slider running delay mechanism for a mold according to claim 6, characterized in that: The biasing element (19) is an elastic element.

8. The slider running delay mechanism for a mold according to claim 7, characterized in that: The elastic element is a helical spring; The helical spring is disposed in the receiving cavity, and the two ends of the helical spring respectively abut against the movable member (18) and the receiving cavity; The helical spring is used to drive the movable part (18) to the locked position by means of tension.

9. The slider running delay mechanism for a mold according to any one of claims 1 to 3, characterized in that: The movable part (18) is a pivot member that can rotate about a pivot relative to the first slider (3); The locking position is when the pivot rotates to the position where it engages with the stop (16); The unlocking position is when the pivot rotates to a position where it is separated from the stop (16).

10. The slider running delay mechanism for a mold according to claim 9, characterized in that: The biasing element (19) is a torsion spring; The torsion spring is mounted on the pivot of the pivot member, and the two ends of the torsion spring respectively abut against the pivot member and the first slider (3); The torsion spring is used to drive the pivot member toward the locked position by providing torque.

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