Demolding mechanism of mold

Abstract

The invention provides a demolding mechanism of a mold, and belongs to the technical field of molds. The problem that when an existing mold is used for manufacturing a product with an inverted buckle, the product is prone to being pulled is solved. The demolding mechanism of the mold comprises an inclined push rod, a demolding sliding block arranged on a fixed mold in a sliding mode, an insert with a notch in the bottom face, an inclined guide column fixedly connected to a movable mold and a tunnel sliding block arranged on the demolding sliding block in a sliding mode in the transverse direction, and the middle section of the inclined guide column is arranged in the demolding sliding block in a sliding and penetrating mode; when the movable mold moves upwards in the longitudinal direction, the movable mold can drive the demolding sliding block to translate backwards in the transverse direction through the inclined guide column, the inclined push rod slidably penetrates through the front end of the demolding sliding block, the front end of the inclined push rod is fixedly connected with the insert, the rear end of the inclined push rod is slidably connected to the front end of the tunnel sliding block in the longitudinal direction, and a reset spring is arranged between the tunnel sliding block and the demolding sliding block. And the movable mold is provided with a stop plane which is longitudinally arranged. According to the invention, the problem of product surface strain or damage possibly caused by direct outward core pulling is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of molds and relates to a mold demolding mechanism. BACKGROUND

[0002] In the mold field, many products have reverse buckle structures due to design requirements. The reverse buckle refers to the protruding, hooking and other structures on the surface of the product after molding. In mold design, a corresponding notch is usually opened on the insert of the mold to realize the molding of the reverse buckle structure. However, after the product is molded, the reverse buckle on the product will be embedded in the notch, causing difficulty in demolding.

[0003] The traditional mold demolding mechanism usually adopts a side core-pulling mode to realize demolding by converting the longitudinal movement of the mold opening and closing into the horizontal movement of the insert. For example, a patent document discloses a multi-stage linkage demolding mechanism of a mold (application number: 202310216719.8), which includes a core, a movable mold and a fixed mold located above the movable mold, the core includes a fixed core fixedly arranged on the fixed mold and a movable core slidingly abutting against the fixed core, and an insert is embedded on the fixed core. The mold cooperates with the sliding seat, the push rod and the movable core to make the movement of the sliding seat realize the side core-pulling of the insert and the separation of the movable core from the surface of the product, thereby ensuring that the product demolding is more convenient. However, this type of demolding mechanism has certain limitations when processing products with reverse buckles, mainly reflected in:

[0004] When the product has a reverse buckle structure, the groove of the molded reverse buckle on the insert needs to be outwardly core-pulled during demolding. However, due to the existence of the reverse buckle structure, directly outwardly core-pulling may cause the surface of the product to be scratched, and even damage the product, seriously affecting the quality of the product. Therefore, the existing mold has the problems of difficult demolding and easy scratching of the product when manufacturing products with reverse buckles. SUMMARY

[0005] The application aims to solve the above problems of the existing technology and provides a mold demolding mechanism. The technical problem solved by the application is that the existing mold has the problem of easy scratching of the product when manufacturing products with reverse buckles.

[0006] The objective of this invention can be achieved through the following technical solution: a demolding mechanism for a mold, the mold comprising a fixed mold and a movable mold located above the fixed mold, the demolding mechanism comprising a demolding slider slidably disposed on the fixed mold, an insert with a notch on its bottom surface, and an inclined guide post fixedly connected to the movable mold, the middle section of the inclined guide post being slidably disposed within the demolding slider, the movable mold being able to drive the demolding slider to move laterally backward via the inclined guide post when moving longitudinally upward, characterized in that the demolding mechanism further comprises an inclined push rod and a tunnel slider slidably disposed laterally on the demolding slider, the inclined push rod... The inclined push rod and the inclined guide post are parallel or coplanar in their longitudinal planes. The front end of the inclined push rod is fixedly connected to the insert and is higher than its rear end. The rear end of the inclined push rod is slidably connected to the front end of the tunnel slider in the longitudinal direction. A return spring is provided between the tunnel slider and the demolding slider. The moving mold has a longitudinally arranged stop plane. When the mold is closed, the rear end of the tunnel slider abuts against the stop plane under the action of the return spring. When the moving mold moves upward in the longitudinal direction to open the mold, the moving mold can separate from the tunnel slider.

[0007] In this mold, the insert is used to form the surface shape of the product, while the notch on the bottom of the insert is used to form the undercut of the product. In the demolding mechanism of this mold, after the mold is closed, the rear end of the tunnel slider abuts against the stop plane of the moving mold under the action of the return spring, thereby realizing the positioning of the insert and ensuring the stability of the insert in the mold-closed state and the molding quality of the product.

[0008] After the injection molding process is completed, the moving mold moves longitudinally upward to open the mold, and the inclined guide post moves accordingly, driving the demolding slider to move laterally backward. At this time, because the stop plane is set longitudinally and the moving mold moves longitudinally to open the mold, in the initial stage of mold opening, the stop plane slides against the rear end of the tunnel slider. The tunnel slider is blocked by the stop plane and cannot move backward, thus remaining stationary. During this process, because the longitudinal planes of the inclined push rod and the inclined guide post are parallel or coplanar, and the front end of the inclined push rod, which is fixedly connected to the insert, is higher than the rear end of the inclined push rod, while the rear end of the inclined push rod slides longitudinally to the tunnel slider, during the backward translation of the demolding slider, the inclined push rod and the insert will only move longitudinally upward (because the tunnel slider remains stationary during this process, the inclined push rod cannot move backward, but only moves upward relative to the tunnel slider), thus causing the insert to disengage from the undercut of the injection molded product first.

[0009] As the moving mold continues to move longitudinally upwards to open the mold, it eventually separates from the tunnel slider. At this point, the tunnel slider, no longer obstructed by the moving mold, can move laterally along with the inclined push rod under the action of the return spring, causing the insert to completely detach from the product, thus completing the demolding process.

[0010] Clearly, the demolding mechanism of this mold, through the coordinated operation of components such as inclined guide pillars, inclined push rods, demolding sliders, and tunnel sliders, achieves the following during the demolding process: the insert first moves longitudinally to disengage from the undercut of the injection-molded product, and then completely detaches from the product. This technical solution effectively avoids the surface scratches or damage that may occur when directly pulling the core outwards, thus significantly improving the demolding quality of the product.

[0011] In the demolding mechanism of the aforementioned mold, the front end of the demolding slider is provided with an inclined push hole. The middle section of the inclined push hole is a cylindrical hole that slides with the inclined push rod. The opening size of the rear section is larger than that of the middle section, and the two are connected by a first stepped surface. The tunnel slider is slidably inserted into the rear section of the inclined push hole. When the mold is closed, there is a distance between the first stepped surface and the front end face of the tunnel slider. This distance allows the tunnel slider to remain stationary in the initial stage of mold opening, while the demolding slider can move laterally backward first. The middle section of the inclined push hole is a cylindrical hole that slides with the inclined push rod, which improves the guiding effect and ensures good stability of the inclined push rod during movement. Enlarging the opening size of the rear section of the inclined push hole and slidably inserting the tunnel slider into the rear section of the inclined push hole not only improves the stability of the tunnel slider during movement but also makes the overall structure more compact. In the above improvements, both the inclined push rod and the tunnel slider are well guided, which helps to improve demolding accuracy and effectively avoids scratches on the product surface caused by component shaking during demolding.

[0012] In the above-mentioned mold demolding mechanism, the rear end face of the tunnel slider is a longitudinally arranged plane, and the rear end face of the tunnel slider and its upper side are connected by an inclined guide slope. The moving mold is provided with a groove, the longitudinal section of which is an obtuse triangle, one of the groove walls is the stop plane, the rear end of the tunnel slider extends into the groove, and the shape of the groove matches the shape of the rear end of the tunnel slider.

[0013] The rear end of the tunnel slider extends into a matching groove, and its rear end face mates with the stop plane, enhancing the stability of the tunnel slider in the mold-closed state. This, in turn, ensures the stability of the insert and the molding quality of the product in the mold-closed state. In the initial stage of mold opening, the stop plane of the moving mold and the rear end face of the tunnel slider form a surface-to-surface guide, better ensuring that the tunnel slider remains stationary when the demolding slider moves backward, thus preventing damage to the product during demolding. Furthermore, the inclined guide surface on the tunnel slider guides the tunnel slider inward into the inclined push hole of the demolding slider during mold closing, ensuring smooth and unobstructed mold closing and guaranteeing the stability of the mold operation.

[0014] In the above-mentioned mold demolding mechanism, the moving mold includes a moving template and a locking module fixedly connected to the moving template. The groove is opened on the locking module. When the moving mold moves longitudinally to open the mold until the rear end of the tunnel slider is dislodged from the groove, the guide slope of the tunnel slider can abut against the lower edge of the front end face of the locking module under the action of the return spring.

[0015] In this design, the locking module can be manufactured separately, which not only simplifies the manufacturing process but also improves machining accuracy. When the rear end of the tunnel slider disengages from the slot, the angled push rod has already driven the insert to move longitudinally and disengage from the undercut of the injection-molded product. The mold continues to open, and the guide slope of the tunnel slider abuts against the lower edge of the front face of the locking module, allowing the tunnel slider to move at a uniform speed. This ensures that the tunnel slider can stably drive the angled push rod and the insert to precisely detach from the injection-molded product along a predetermined trajectory, preventing damage to the product.

[0016] In the above-mentioned mold demolding mechanism, a hinged slider is slidably connected longitudinally on the front end face of the tunnel slider. A pivot pin is provided inside the hinged slider. The pivot pin is horizontally positioned and its axial direction is perpendicular to the axial direction of the inclined push rod. The pivot pin can rotate around its axis. The rear end of the inclined push rod is fixedly connected to the pivot pin.

[0017] If the rear end of the angled ejector is directly fixed to the tunnel slider, although in the initial stage of mold opening, when the demolding slider moves laterally relative to the tunnel slider, the angled ejector can also move longitudinally to disengage the insert from the undercut of the injection molded product, this structure requires high assembly precision. If the assembly error is large, the angled ejector may get stuck in the angled ejector hole or be unable to slide normally, affecting the demolding effect.

[0018] As a preferred embodiment, the rear end of the angled push rod is hinged to the hinged slider via a rotatable pivot pin, and the hinged slider is slidably connected to the tunnel slider along the longitudinal direction. This hinged method allows the rear end of the angled push rod to float within a certain range, thereby better accommodating assembly errors, reducing jamming and wear of the angled push rod caused by assembly errors, improving demolding accuracy and stability, and preventing the product from being damaged during demolding.

[0019] In the aforementioned mold ejection mechanism, the shape of the front section of the inclined push hole matches the shape of the insert. A "Π"-shaped limiting plate is fixedly connected to the edge surface of the rear port of the inclined push hole. The side of the tunnel slider has a limiting step surface. When the moving mold moves longitudinally to open the mold and separates from the tunnel slider, the pushing action of the return spring causes the limiting step surface to abut against the limiting plate. Simultaneously, the insert is embedded in the front section of the inclined push hole. In this design, the limiting plate can limit the sliding distance of the tunnel slider, preventing it from falling out under the action of the return spring. After the mold is fully opened, the mold separates from the tunnel slider. Under the action of the return spring, the limiting step surface abuts against the limiting plate. At this time, the insert is embedded in the front section of the inclined push hole, meaning the insert remains retracted into the inclined push hole. This design can prevent the insert from impacting the mold surface during mold closing, thus avoiding the risk of mold damage.

[0020] In the above-mentioned mold demolding mechanism, a spring mounting hole is provided on the first step surface, the reset spring is disposed in the spring mounting hole and abuts against the front end face of the tunnel slider, and the axial direction of the reset spring is parallel to the sliding direction of the demolding slider.

[0021] The return spring is installed in the spring mounting hole, with its axis parallel to the sliding direction of the demolding slider. This improves the installation stability of the return spring and allows its elastic force to act directly and effectively on the tunnel slider. A larger return spring can also be selected. Thus, when the mold opens and the rear end of the tunnel slider disengages from the groove, the return spring can stably push the tunnel slider laterally, ensuring the insert is stably released from the product without damaging it. Furthermore, after the insert is completely released from the tunnel slider, it can stably reset the tunnel slider, allowing the insert to retract smoothly into the angled push hole.

[0022] In the demolding mechanism of the aforementioned mold, a mounting groove is provided on the front end face of the tunnel slider. A "Π"-shaped slide block with its open end facing outwards is fixedly installed within the mounting groove. The hinged slider is a rectangular block and slides longitudinally between the two side walls of the slide block. The mounting groove improves the installation stability of the slide block. The "Π"-shaped slide block makes the hinged slider slide more smoothly during sliding, reducing jamming caused by poor sliding.

[0023] In the demolding mechanism of the aforementioned mold, a push spring is also provided between the demolding slider and the fixed mold to push the demolding slider backward. During the mold opening process, the pushing force of the push spring can help the demolding slider move backward laterally more effectively, thereby improving the stability of the demolding process.

[0024] In the demolding mechanism of the aforementioned mold, a guide hole is provided at the rear end of the demolding slider, and the middle section of the inclined guide post slides through the guide hole. A limit block is also fixedly connected to the outer wall of the fixed mold. When the moving mold separates from the tunnel slider, the demolding slider abuts against the limit block, and at the same time, the upper end of the guide hole and the lower end of the inclined guide post are aligned longitudinally. The limit block limits the backward movement of the demolding slider, so that after the mold opens, the upper end of the guide hole and the lower end of the inclined guide post are aligned longitudinally, ensuring that the inclined guide post can be smoothly inserted into the guide hole when the mold closes.

[0025] Compared with existing technologies, the demolding mechanism of this mold has the following advantages: Through the coordinated operation of components such as inclined guide pillars, inclined push rods, demolding sliders, and tunnel sliders, the demolding mechanism achieves the following: during the demolding process, the insert first moves longitudinally to disengage from the undercut of the injection-molded product, and then completely detaches from the product. This technical solution effectively avoids the surface scratches or damage that may occur when directly pulling the core outwards, thus significantly improving the demolding quality of the product. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the mold's demolding mechanism.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0029] Figure 4 This is a sectional view of the demolding mechanism during the mold opening process.

[0030] Figure 5 yes Figure 4 A rotated sectional view of the structure shown.

[0031] Figure 6 This is a three-dimensional structural diagram of the tunnel slider.

[0032] Figure 7 This is a 3D structural diagram of the lock module.

[0033] Figure 8 This is an exploded view of some components of this demolding mechanism.

[0034] Figure 9 This is a three-dimensional structural diagram of the demolding slider.

[0035] Figure 10 This is an assembly diagram of the demolding slider, tunnel slider, and limit plate.

[0036] Figure 11 This is a simplified schematic diagram illustrating the demolding principle of this demolding mechanism.

[0037] Figure 12 This is a simplified schematic diagram of the demolding mechanism in the mold-opening state.

[0038] In the diagram, 1. Fixed mold; 2. Moving mold; 21. Moving template; 22. Locking module; 221. Slot; 221a. Stopping plane; 3. Insert; 31. Notch; 4. Angled guide post; 5. Angled push rod; 6. Demolding slider; 61. Angled push hole; 611. First step surface; 62. Guide hole; 63. Spring mounting hole; 7. Tunnel slider; 71. Guide slope; 72. Limiting step surface; 73. Mounting groove; 8. Return spring; 9. Hinge slider; 10. Turning pin; 11. Limiting plate; 12. Slide seat; 13. Push spring; 14. Limiting block; 15. Cavity. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0041] like Figure 1As shown, in the demolding mechanism of this mold, the mold includes a fixed mold 1 and a movable mold 2 that can move longitudinally relative to the fixed mold 1. The movable mold 2 includes a movable template 21 and a locking module 22 fixedly connected to the movable template 21. After the movable mold 2 moves longitudinally and closes, the movable mold 2 and the fixed mold 1 enclose to form a cavity 15. This demolding mechanism includes a slanted push rod 5, an insert 3 for molding the surface shape of the product, a slanted guide post 4 fixedly connected to the movable mold 2, a demolding slider 6 slidably disposed on the fixed mold 1 in the transverse direction, and a tunnel slider 7 slidably disposed on the demolding slider 6 in the transverse direction. A return spring 8 is provided between the tunnel slider 7 and the demolding slider 6. The front end of the demolding slider 6 has an inclined slanted push hole 61 and the rear end has an inclined guide hole 62. The middle section of the slanted guide post 4 slides through the guide hole 62, and the slanted push rod 5 slides through the slanted push hole 61. The longitudinal planes of the slanted push rod 5 and the slanted guide post 4 are parallel or coplanar. The front end of the inclined push rod 5 is fixedly connected to the insert 3, and this end is higher than its rear end. The rear end of the inclined push rod 5 is slidably connected to the front end of the tunnel slider 7 along the longitudinal direction. The locking module 22 has a longitudinally arranged stop plane 221a. When the mold is closed, the rear end of the tunnel slider 7 abuts against the stop plane 221a under the action of the return spring 8. When the moving mold 2 moves upward along the longitudinal direction to open the mold, the moving mold 2 can separate from the tunnel slider 7. In order to assist the demolding slider 6 to move laterally backward better, a push spring 13 is also provided between the demolding slider 6 and the fixed mold 1 to push the demolding slider 6 backward. In addition, a limit block 14 is fixedly connected to the outer wall of the fixed mold 1. After the demolding slider 6 slides laterally backward, it can abut against the limit block 14. At the same time, the upper port of the guide hole 62 is directly opposite the lower end of the inclined guide post 4 along the longitudinal direction. The limiting block 14 limits the backward movement of the demolding slider 6, so that after the mold is opened, the upper end of the guide hole 62 is aligned longitudinally with the lower end of the inclined guide post 4, ensuring that the inclined guide post 4 can be smoothly inserted into the guide hole 62 when the mold is closed.

[0042] like Figure 2 As shown, a notch 31 is provided on the bottom surface of the insert 3 to achieve the inverted forming of the product.

[0043] like Figure 1 As shown, the shape of the front section of the inclined push hole 61 matches the shape of the insert 3. The middle section of the inclined push hole 61 is a cylindrical hole that slides with the inclined push rod 5. The opening size of the rear section is larger than that of the middle section, and the two are connected by a first step surface 611. The tunnel slider 7 is slidably inserted into the rear section of the inclined push hole 61. When the mold is closed, there is a distance between the first step surface 611 and the front end face of the tunnel slider 7, which allows the tunnel slider 7 to remain stationary in the initial stage of mold opening, while the demolding slider 6 can move laterally backward first. Among them, a spring mounting hole 63 is provided on the first step surface 611. The return spring 8 is set in the spring mounting hole 63 and abuts against the front end face of the tunnel slider 7. The axial direction of the return spring 8 is parallel to the sliding direction of the demolding slider 6.

[0044] like Figure 5 and Figure 6 As shown, the rear end face of the tunnel slider 7 is a longitudinally oriented plane. The rear end face of the tunnel slider 7 and its upper side are connected by an inclined guide ramp 71. The locking module 22 has a groove 221, the longitudinal section of which is an obtuse triangle. One wall of the groove 221 is a stop plane 221a. Figure 1 As shown, the rear end of the tunnel slider 7 extends into the groove 221, and the shape of the groove 221 matches the shape of the rear end of the tunnel slider 7.

[0045] like Figure 3 and Figure 7 As shown, a hinged slider 9 is slidably connected longitudinally to the front end face of the tunnel slider 7. A pivot pin 10 is provided inside the hinged slider 9. The pivot pin 10 is horizontally positioned and its axis is perpendicular to the axis of the inclined push rod 5. The pivot pin 10 can rotate around its axis. The rear end of the inclined push rod 5 is fixedly connected to the pivot pin 10. Specifically, a mounting groove 73 is provided on the front end face of the tunnel slider 7. A slide block 12 with a "Π" shape and an open end facing outward is fixedly installed in the mounting groove 73. The hinged slider 9 is rectangular and is slidably positioned longitudinally between the two side walls of the slide block 12.

[0046] like Figure 5 , Figure 8 and Figure 9 As shown, a "Π"-shaped limiting plate 11 is fixedly connected to the edge surface of the rear port of the inclined push hole 61. The side of the tunnel slider 7 has a limiting step surface 72. When the moving mold 2 moves longitudinally to open the mold and separates from the tunnel slider 7, the pushing action of the return spring 8 causes the limiting step surface 72 to abut against the limiting plate 11. Simultaneously, as... Figure 1 As shown, insert 3 is embedded in the front section of the inclined push hole 61. This design can prevent insert 3 from impacting the mold surface when it is in the ejected state during the mold closing process, thereby avoiding the risk of mold damage.

[0047] The working principle of this demolding mechanism is explained below with reference to the accompanying drawings:

[0048] like Figure 1 As shown, after the mold is closed, the moving mold 2 and the fixed mold 1 enclose each other to form a cavity 15. Under the action of the return spring 8, the rear end of the tunnel slider 7 abuts against the stop plane 221a, thereby realizing the positioning of the insert 3.

[0049] To better understand the process of removing the mold Figure 11 The lower part provides a brief illustration of the demolding mechanism's state during mold closing. Figure 11 The upper part is a brief illustration of the working state of the demolding mechanism during the initial stage of mold opening.

[0050] Combination Figure 11 As shown, after the injection molding process is completed, the moving mold 2 moves upward longitudinally to open the mold, and the inclined guide post 4 moves upward accordingly. Since the inclined guide post 4 is slidably connected to the inclined guide hole 62 on the demolding slider 6, the movement of the inclined guide post 4 will drive the demolding slider 6 to move backward.

[0051] During this process, because the locking module 22 on the moving mold 2 has a longitudinally arranged stop plane 221a, and the locking module 22 only moves longitudinally, in the initial stage of mold opening, the stop plane 221a slides against the rear end face of the tunnel slider 7. The tunnel slider 7 is blocked by the stop plane 221a and cannot move backward, thus remaining stationary. Additionally, during this process, because the inclined push rod 5 slides through the inclined push hole 61 of the demolding slider 6, the lateral sliding of the demolding slider 6 will drive the inclined push rod 5 to move longitudinally upward through the inclined push hole 61, thereby causing the insert 3 to disengage from the undercut of the injection molded product first. Figure 11 As shown, when the moving mold 2 moves upward and causes the demolding slider 6 to move backward by a distance L, the lateral position of the insert 3 remains unchanged, but it moves upward by a distance in the longitudinal direction.

[0052] Moving mold 2 continues to move upward to open the mold, as... Figure 4 and Figure 5 As shown, under the action of the return spring 8, the locking module 22 of the moving mold 2 will continue to move upward along the guide slope 71 of the tunnel slider 7. This structure ensures that the tunnel slider 7 will not be instantly pushed out by the return spring 8 due to the obstruction of the locking module 22, but will move smoothly and uniformly backward as the locking module 22 moves upward. This ensures that the tunnel slider 7 can stably and uniformly drive the inclined push rod 5 and the insert 3 to detach from the injection molded product, avoiding damage to the product.

[0053] As the mold-making process continues, eventually... Figure 12 As shown, the moving mold 2 can be completely separated from the tunnel slider 7. At this time, the tunnel slider 7 loses the obstruction of the moving mold 2. Under the action of the return spring 8, the tunnel slider 7 can move laterally together with the inclined push rod 5 and drive the insert 3 to completely detach from the product, thus completing the demolding.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0055] Although this document frequently uses terms such as 1. fixed mold; 2. moving mold; 21. moving template; 22. locking module; 221. slot; 221a. stop plane; 3. insert; 31. notch; 4. inclined guide post; 5. inclined push rod; 6. demolding slider; 61. inclined push hole; 611. first step surface; 62. guide hole; 63. spring mounting hole; 7. tunnel slider; 71. guide inclined surface; 72. limiting step surface; 73. mounting groove; 8. return spring; 9. hinged slider; 10. pivot pin; 11. limiting plate; 12. slide block; 13. push spring; 14. limiting block; 15. cavity, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A demolding mechanism for a mold, the mold comprising a fixed mold (1) and a movable mold (2) located above the fixed mold (1), the demolding mechanism comprising a demolding slider (6) slidably disposed on the fixed mold (1), an insert (3) having a notch (31) on its bottom surface, and an inclined guide post (4) fixedly connected to the movable mold (2), the middle section of the inclined guide post (4) slidably passing through the demolding slider (6), the movable mold (2) being able to drive the demolding slider (6) to move laterally backward when moving longitudinally upward, characterized in that, The demolding mechanism also includes a slanted push rod (5) and a tunnel slider (7) that is slidably disposed on the demolding slider (6) in the transverse direction. The slanted push rod (5) is slidably disposed at the front end of the demolding slider (6). The longitudinal planes of the slanted push rod (5) and the slanted guide post (4) are parallel or coplanar. The front end of the slanted push rod (5) is fixedly connected to the insert (3) and the end is higher than the height of its rear end. The rear end of the slanted push rod (5) is slidably connected to the front end of the tunnel slider (7) in the longitudinal direction. A return spring (8) is provided between the tunnel slider (7) and the demolding slider (6). The moving mold (2) has a longitudinally disposed stop plane (221a). When the mold is closed, the rear end of the tunnel slider (7) abuts against the stop plane (221a) under the action of the return spring (8). When the moving mold (2) moves upward in the longitudinal direction to open the mold, the moving mold (2) can separate from the tunnel slider (7).

2. The demolding mechanism of the mold according to claim 1, characterized in that, The front end of the demolding slider (6) is provided with a slanted push hole (61). The middle section of the slanted push hole (61) is a cylindrical hole that slides with the slanted push rod (5). The opening size of the rear section is larger than that of the middle section, and the two are connected by a first step surface (611). The tunnel slider (7) is slidably inserted into the rear section of the slanted push hole (61). When the mold is closed, the first step surface (611) and the front end face of the tunnel slider (7) are a certain distance apart.

3. The demolding mechanism of the mold according to claim 2, characterized in that, The rear end face of the tunnel slider (7) is a longitudinally arranged plane. The rear end face of the tunnel slider (7) and its upper side are connected by an inclined guide slope (71). The moving mold (2) is provided with a groove (221). The longitudinal section of the groove (221) is an obtuse triangle. One of the groove walls of the groove (221) is the stop plane (221a). The rear end of the tunnel slider (7) extends into the groove (221), and the shape of the groove (221) matches the shape of the rear end of the tunnel slider (7).

4. The demolding mechanism of the mold according to claim 3, characterized in that, The moving mold (2) includes a moving template (21) and a locking module (22) fixedly connected to the moving template (21). The groove (221) is opened on the locking module (22). When the moving mold (2) moves longitudinally to open the mold until the rear end of the tunnel slider (7) is dislodged from the groove (221), under the action of the reset spring (8), the guide slope (71) of the tunnel slider (7) can abut against the lower edge of the front end face of the locking module (22).

5. The demolding mechanism of the mold according to claim 2, 3, or 4, characterized in that, The tunnel slider (7) has a hinged slider (9) that slides longitudinally on its front end face. The hinged slider (9) has a pivot pin (10) inside it. The pivot pin (10) is horizontally positioned and its axis is perpendicular to the axis of the inclined push rod (5). The pivot pin (10) can rotate around its axis. The rear end of the inclined push rod (5) is fixedly connected to the pivot pin (10).

6. The demolding mechanism of the mold according to claim 2, 3, or 4, characterized in that, The shape of the front section of the inclined push hole (61) matches the shape of the insert (3). A "Π"-shaped plate-shaped limiting plate (11) is fixedly connected to the edge surface of the rear port of the inclined push hole (61). The side of the tunnel slider (7) has a limiting step surface (72). When the moving mold (2) moves longitudinally to open the mold and separates from the tunnel slider (7), the pushing action of the reset spring (8) can make the limiting step surface (72) abut against the limiting plate (11). At the same time, the insert (3) is embedded in the front section of the inclined push hole (61).

7. The demolding mechanism of the mold according to claim 2, 3, or 4, characterized in that, A spring mounting hole (63) is provided on the first step surface (611). The reset spring (8) is disposed in the spring mounting hole (63) and abuts against the front end face of the tunnel slider (7). The axial direction of the reset spring (8) is parallel to the sliding direction of the demolding slider (6).

8. The demolding mechanism of the mold according to claim 5, characterized in that, The tunnel slider (7) has an installation groove (73) on its front end surface. A slide block (12) in the shape of "Π" with its opening facing outward is fixedly installed in the installation groove (73). The hinge slider (9) is rectangular and slides longitudinally between the two side walls of the slide block (12).

9. The demolding mechanism of the mold according to claim 1, 2, 3, or 4, characterized in that, A push spring (13) is also provided between the demolding slider (6) and the fixed mold (1) to push the demolding slider (6) backward.

10. The demolding mechanism of the mold according to claim 1, 2, 3, or 4, characterized in that, The demolding slider (6) has a guide hole (62) at its rear end. The middle section of the inclined guide post (4) slides through the guide hole (62). A limit block (14) is also fixedly connected to the outer wall of the fixed mold (1). When the moving mold (2) separates from the tunnel slider (7), the demolding slider (6) abuts against the limit block (14). At the same time, the upper end of the guide hole (62) and the lower end of the inclined guide post (4) are aligned longitudinally.

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