A deep cavity product injection mold

Abstract

The application relates to a deep-cavity product injection mold, which comprises a movable mold, a fixed mold, a movable mold core and a fixed mold core arranged on the movable mold and the fixed mold respectively, a plurality of side cores are arranged on the fixed mold in a sliding mode in the circumferential direction, a guide slope is arranged on the movable mold to drive the side cores to slide synchronously, a molding insert which can slide relative to the side core is arranged on the side core, and an elastic reset member is arranged between the molding insert and the side core. During mold opening, the molding insert performs a demolding action prior to the side core under the action of the elastic reset member, so that the molding insert is separated from the local features of the product first. Through the asynchronous demolding design, the lateral extrusion stress during demolding of the deep-cavity product is avoided, the structure is simple and the core pulling is stable, the product surface can be effectively prevented from being scratched or deformed, a plurality of sensing assemblies and a controller are matched, closed-loop control of the complex action time sequence is realized, and the molding stability and production safety of the large mold are improved.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a deep cavity product injection mold. Background Technology

[0002] Injection molding is one of the most widely used molding processes in the production of plastic parts. Large injection molds are mainly used for the mass production of large-size, large-projection-area plastic products such as automotive interior and exterior trim, home appliance housings, and logistics turnover boxes. As industrial manufacturing demands increasingly higher requirements for the dimensional accuracy, surface quality, production efficiency, and molding stability of injection molded parts, the requirements for injection molds are also becoming increasingly stringent. Currently, automotive interior parts (such as center consoles, storage boxes, armrests, and instrument panels) are mostly complex shell structures with deep cavities, multiple reinforcing ribs, and internal staggered partitions. These products have lateral molding features such as snap-fits, grooves, and mounting posts on all four sides, placing high demands on the structural design of injection molds.

[0003] Existing technologies also include molds for injection molding deep-cavity products. Chinese patent application CN121608339A, published on March 6, 2026, discloses a side-clamping demolding method for a mold of a rear storage box for an automotive auxiliary instrument panel. The mold includes a cavity frame and a core plate. A cavity insert is provided in the cavity frame, and a core insert and a sidewall forming insert are provided on the core plate. A core-pulling slider is slidably mounted on the sidewall forming insert, and a core-pulling guide block is provided on the core-pulling slider. The core-pulling guide block passes through the sidewall. The molding insert has a side wall molding insert with a slidable demolding strip and a snap-fit ​​insert. During demolding, the core plate and the cavity frame open. During the demolding process, the side pulling mechanism drives the core pulling slider to slide outward on the side wall molding insert. The core pulling slider drives the core pulling guide block to slide outward. Under the action of the inclined sliding guide mechanism, the demolding strip and the snap-fit ​​insert slide upward and outward, so that the snap-fit ​​insert is released from the side snap. Then, the external sliding cylinder drives the side wall molding insert and the core pulling slider to slide outward together, so that the side wall molding insert is demolded from the side wall of the product.

[0004] The aforementioned application employs a synchronized demolding mechanism where the release of the snap-fit ​​inserts and the outward sliding of the slider occur simultaneously. However, if... Figure 1 and Figure 2 Deep cavity products have large side wall projection areas and strong demolding forces, and there are multiple clips on the side. This synchronous action is very likely to generate lateral extrusion stress at the clips on the side, resulting in surface scratches or feature deformation of the product. Therefore, it is necessary to design a deep cavity product injection mold with a simple structure and more stable core pulling. Summary of the Invention

[0005] This application provides a deep cavity product injection mold with simple structure, precise positioning and convenient demolding.

[0006] The technical solution for a deep cavity product injection mold provided in this application is as follows: A deep-cavity product injection mold includes a moving mold and a fixed mold. The moving mold and the fixed mold are respectively provided with a moving mold core and a fixed mold core, which are offset from each other in the mold-closing direction. Multiple side cores are slidably disposed on the fixed mold, distributed circumferentially on the outer side of the fixed mold core. During mold closing, the moving mold core, the fixed mold core, and the multiple side cores together form a cavity for molding the deep-cavity product. A guide slope is provided on the moving mold, which drives the multiple side cores to slide synchronously towards or away from the fixed mold core. Multiple molding inserts that can slide relative to the side cores are disposed on the side cores. One end of each molding insert is connected to the guide slope, and the other end extends into the cavity. An elastic reset member is provided between the molding insert and the side core. During mold opening, under the action of the elastic reset member, the molding insert preferentially performs a demolding action away from the cavity, so that the molding insert detaches from the local features of the product first.

[0007] Preferably, the moving mold has multiple grooves at one end near the fixed mold, and the guide slope is provided in the grooves. The side core has a slope that matches the guide slope on its outer side. The moving mold has a slanted guide post at one end near the fixed mold. The slanted guide post can be inserted into the side core, and the inclination angle of the slanted guide post matches the angle of the guide slope.

[0008] Preferably, the multiple side cores are independently slidably disposed on the fixed mold, and each of the multiple side cores is provided with at least one inclined guide post and at least one guide inclined surface, so that the multiple side cores can slide synchronously under the drive of the moving mold.

[0009] Preferably, the side core includes a sliding block slidably connected to the fixed mold and a core block fixed to the front end of the sliding block. The sliding block is provided with an inclined through hole that matches the angle and diameter of the inclined guide post. The inner side of the core block matches the shape of the cavity, and the outer side of the core block is provided with an inclined surface that matches the angle of the guide inclined surface.

[0010] Preferably, the sliding block is provided with a first sensing component for monitoring the sliding position of the side core. The first sensing component includes a first sensing rod connected to the sliding block and a first sensing switch disposed on the fixed mold. There are two first sensing switches. When the side core slides to a preset position, the first sensing rod triggers the first sensing switch.

[0011] Preferably, the molded insert includes a connecting rod that passes through the side core, one end of the connecting rod is connected to an insert, and the other end of the connecting rod is connected to a wear-resistant guide block. The wear-resistant guide block has an inclined surface that matches the angle of the guide slope. The elastic reset member is provided between the wear-resistant guide block and the side core. The elastic reset member is used to provide a preload force to make the molded insert slide closer to the guide slope.

[0012] Preferably, the end of the connecting rod away from the insert extends out of the wear-resistant guide block and is inclined. A positioning groove is provided on the guide inclined surface corresponding to the position of the connecting rod. The positioning groove is provided along the inclined direction of the guide inclined surface. One end of the positioning groove is provided with a rounded corner or chamfer, and the other end of the positioning groove can be connected to the end side of the connecting rod.

[0013] Preferably, the moving mold is provided with an undercut core-pulling mechanism located inside the moving mold core. The undercut core-pulling mechanism includes a core-pulling drive provided on the moving mold, a core-pulling guide block connected to the core-pulling drive, a T-shaped guide groove provided at the end of the core-pulling guide block and a slidably connected undercut core-pulling block through the T-shaped guide groove, the undercut core-pulling block being used for internal undercutting of the molded product and performing demolding action, a second sensing component for detecting the position of the core-pulling guide block being connected to the core-pulling guide block, the second sensing component including a second sensing rod and a second sensing switch, the second sensing rod being connected to the core-pulling guide block, two second sensing switches being provided at different positions on the moving mold, the second sensing rod being able to trigger the second sensing switch.

[0014] Preferably, the fixed mold is further provided with an ejection mechanism for ejecting the molded deep cavity product. The ejection mechanism includes an ejection plate and a plurality of ejection rods disposed on the ejection plate. An ejection drive is connected to the ejection plate. The ends of the ejection rods can extend into the cavity. A third sensing component is connected to the ejection plate. The third sensing component includes a third sensing rod disposed on the ejection plate. A third sensing switch is provided on the side of both the fixed mold and the moving mold. The third sensing rod can trigger the third sensing switch.

[0015] Preferably, the first sensing component, the second sensing component, and the third sensing component are all electrically connected to the controller. The controller controls the stroke of the moving mold, the timing of the actions of the undercut core-pulling mechanism, and the ejection mechanism based on the signals fed back by the first sensing component, the second sensing component, and the third sensing component.

[0016] In summary, this application includes at least one of the following beneficial technical effects: This application, by setting a molding insert with an elastic reset element between the molding insert and the side core, and combining the clamping and releasing structure with the guide slope on the moving mold, enables the molding insert to slide away from the cavity first, prior to the side core, so that the local snap-fit ​​features are demolded first. This avoids the lateral extrusion stress caused by the superposition of the large area demolding force on the side wall of the deep cavity product and the snap-fit ​​demolding force, which can avoid surface scratches or feature deformation of the product and ensure the injection molding effect.

[0017] By setting a dual-drive structure of guide ramps and inclined guide pillars on the moving mold, and cooperating with the structure of the ramps and inclined through holes on the side cores, it is possible to achieve the effect of synchronous and smooth sliding of multiple side cores under the drive of the moving mold, ensuring rigid support during the opening and closing process of large molds, and ensuring the accuracy and stability of long-distance movement.

[0018] By setting up an undercut core-pulling mechanism located inside the moving mold core, and utilizing the structure of the inclined guide groove between the core-pulling guide block and the undercut core-pulling block, the oblique core-pulling demolding effect of the undercut feature in the narrow internal space of the product can be achieved, ensuring the injection molding of complex shell structures.

[0019] By setting a positioning groove on the guide slope that abuts against the side of the connecting rod, a mechanical locking effect can be achieved on the molded insert, preventing the insert from moving back due to high injection pressure, and ensuring stable molding of local features and accurate dimensions of the product; at the same time, the rounded or chamfered design at one end of the positioning groove can make the guide contact smoother, reduce wear and extend the mold life.

[0020] By setting up multiple sets of sensing components to monitor the position of the side core, internal undercut mechanism and ejection mechanism, and by having the controller coordinate the timing of the actions, a closed-loop control effect can be achieved for the entire process of the movement of each part of the mold. This ensures that each mechanism operates strictly in the preset sequence during the mold opening and closing cycle, guaranteeing injection molding effect and production efficiency. Attached Figure Description

[0021] Figure 1 This is a 3D view of a deep cavity product.

[0022] Figure 2 This is a three-dimensional view of the deep cavity product from another perspective.

[0023] Figure 3 This is a perspective view of a deep cavity product injection mold in a preferred embodiment of this application.

[0024] Figure 4 This is a perspective view of a deep-cavity product injection mold in a preferred embodiment of this application.

[0025] Figure 5 This is a front view of a deep-cavity product injection mold in a preferred embodiment of this application.

[0026] Figure 6 This is a perspective view of the inverted core-pulling mechanism in a preferred embodiment of this application. For clarity, some components have been omitted.

[0027] Figure 7 This is a perspective view of the moving model core fixing plate in a preferred embodiment of this application.

[0028] Figure 8 This is a perspective view of the fixed mold and side core in a preferred embodiment of this application. For clarity, some parts have been omitted.

[0029] Figure 9 yes Figure 8 A magnified view of a portion of point A in the middle.

[0030] Figure 10 This is a perspective view of the fixed mold and side core from another angle in the preferred embodiment of this application. For clarity, some parts have been omitted.

[0031] Figure 11 This is a side view of the fixed mold and side core in a preferred embodiment of this application. For clarity, some parts have been omitted.

[0032] Figure 12 This is a schematic diagram of the inverted core-pulling mechanism in a preferred embodiment of this application.

[0033] Figure 13 This is a perspective view of the fixed mold and molding insert in a preferred embodiment of this application. For clarity, some parts have been omitted.

[0034] Figure 14 yes Figure 13 A magnified view of a section at point B.

[0035] Figure 15 This is a schematic diagram of the structure of the molded insert in a preferred embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Moving mold; 101. Guide slope; 101a. Positioning groove; 102. Inclined guide post; 103. Groove; 2. Fixed mold; 3. Moving mold core; 4. Fixed mold core; 5. Side core; 501. Sliding block; 501a. Inclined through hole; 502. Core block; 6. Molding insert; 601. Connecting rod; 602. Insert; 603. Wear-resistant guide block; 604. Elastic reset component; 7. First sensing component; 701. First sensing rod; 702. First sensing switch; 8. Inverted core-pulling mechanism; 801. Core-pulling drive; 802. Core-pulling guide block; 803. Inverted core-pulling block; 9. Second sensing component; 901. Second sensing rod; 902. Second sensing switch; 10. Ejection mechanism; 1001. Ejection plate; 11. Third sensing component; 1101. Third sensing rod; 1102. Third sensing switch. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the accompanying drawings.

[0038] This application discloses a deep cavity product injection mold.

[0039] Reference Figures 1 to 15 A deep-cavity product injection mold includes a moving mold 1 and a fixed mold 2. Moving mold core 3 and fixed mold core 4 are respectively provided on the moving mold 1 and the fixed mold 2. The moving mold core 3 and the fixed mold core 4 are offset in the mold closing direction. Multiple side cores 5 are slidably disposed on the fixed mold 2, and the multiple side cores 5 are distributed circumferentially on the outer side of the fixed mold core 4. When the mold is closed, the moving mold core 3, the fixed mold core 4, and the multiple side cores 5 together enclose a cavity for molding the deep-cavity product. Specifically, the multi-faceted cavity structure... Figure 1 and Figure 2 The shape of the corresponding deep cavity product is matched.

[0040] Specifically, in this embodiment, the moving mold 1 includes a top plate, a moving mold core fixing plate, and a moving mold core 3 arranged sequentially from top to bottom. The fixed mold 2 includes a bottom plate and a hot runner plate arranged sequentially from bottom to top. A support plate is vertically arranged on the side of the hot runner plate. An ejector plate 1001 is arranged between the four support plates. A fixed mold core fixing plate is arranged at the end of the support plate. A fixed mold core 4 is arranged on the fixed mold core fixing plate.

[0041] Reference Figure 7 The moving mold 1 is provided with a guide slope 101. In this embodiment, the guide slope 101 is located inside the moving mold core fixing plate. The guide slope 101 is used to drive multiple side cores 5 to slide synchronously towards or away from the fixed mold core 4. Specifically, refer to Figure 8 , Figure 8 The moving mold core 3 is located between the side cores 5. The moving mold 1 has multiple grooves 103 at the end near the fixed mold 2, and a guide slope 101 is provided in the grooves 103. The side core 5 has a slope that matches the guide slope 101 on the outside. The moving mold 1 has a slanted guide post 102 at the end near the fixed mold 2. The slanted guide post 102 can be inserted into the side core 5, and the inclination angle of the slanted guide post 102 matches the angle of the guide slope 101. Specifically, multiple side cores 5 are independently slidably arranged on the fixed mold 2. Each of the multiple side cores 5 is provided with at least one slanted guide post 102 and at least one guide slope 101, so that the multiple side cores 5 can slide synchronously under the drive of the moving mold 1.

[0042] Reference Figures 7 to 9The side core 5 includes a sliding block 501 slidably connected to the fixed mold 2 and a core block 502 fixed to the front end of the sliding block 501. The sliding block 501 is provided with an inclined through hole 501a that matches the angle and diameter of the inclined guide post 102. The inner side of the core block 502 matches the shape of the cavity, and the outer side of the core block 502 is provided with an inclined surface that matches the angle of the guide inclined surface 101. The sliding block 501 is provided with a first sensing component 7 for monitoring the sliding position of the side core 5. The first sensing component 7 includes a first sensing rod 701 connected to the sliding block 501 and a first sensing switch 702 provided on the fixed mold 2. There are two first sensing switches 702. When the side core 5 slides to a preset position, the first sensing rod 701 triggers the first sensing switch 702.

[0043] Reference Figures 11 to 15 A plurality of slidable molding inserts 6 are provided on the side core 5. One end of the molding insert 6 is connected to the guide slope 101, and the other end of the molding insert 6 extends into the cavity. An elastic reset member 604 is provided between the molding insert 6 and the side core 5. During the mold opening process, under the action of the elastic reset member 604, the molding insert 6 performs a demolding action away from the cavity in priority over the side core 5, so that the molding insert 6 detaches from the local features of the product first. Specifically, the molding insert 6 includes a through-hole molded insert on the side core 5. The connecting rod 601 on the core 5 has an insert 602 connected to one end. The shape of the insert 602 matches the shape of the undercut on the cavity. The other end of the connecting rod 601 is connected to a wear-resistant guide block 603. The wear-resistant guide block 603 has an inclined surface that matches the angle of the guide slope 101. An elastic reset member 604 is provided between the wear-resistant guide block 603 and the side core 5. The elastic reset member 604 is used to provide a preload force to make the molding insert 6 slide towards the guide slope 101.

[0044] Reference Figure 7 and Figure 15 The end of the connecting rod 601 away from the insert 602 extends through the wear-resistant guide block 603 and is inclined. A positioning groove 101a is provided on the guide inclined surface 101 corresponding to the position of the connecting rod 601. The positioning groove 101a is set along the inclined direction of the guide inclined surface 101. One end of the positioning groove 101a is provided with a rounded corner or chamfer. The other end of the positioning groove 101a can connect with the end side of the connecting rod 601 to ensure the mechanical locking effect of the connecting rod 601 and prevent the insert from moving back due to high injection pressure. In this embodiment, the positioning groove 101a is a concave strip groove and the lower end of the positioning groove 101a is inclined outward with a guide section. The length of the positioning groove 101a is sufficient to accommodate the displacement of the molded insert 6 relative to the side core 5 during the initial mold opening. The end of the connecting rod 601 near the guide inclined surface 101 is provided with a corresponding inclined guide section, which can make the guide contact smoother, reduce wear and extend the mold life.

[0045] Reference Figure 6 , Figures 10 to 13 The moving mold 1 is provided with an undercut core-pulling mechanism 8, which is located inside the moving mold core 3. The undercut core-pulling mechanism 8 includes a core-pulling drive 801 provided on the moving mold 1. A core-pulling guide block 802 is connected to the core-pulling drive 801. The end of the core-pulling guide block 802 is provided with a T-shaped guide groove, and an undercut core-pulling block 803 is slidably connected through the T-shaped guide groove. The undercut core-pulling block 803 is used for internal undercutting of the molded product and performing demolding action. A second sensing component 9 for detecting the position of the core-pulling guide block 802 is connected to the core-pulling guide block 802. The second sensing component 9 includes a second sensing rod 901 and a second sensing switch 902. The second sensing rod 901 is connected to the core-pulling guide block 802. There are two second sensing switches 902, and the two second sensing switches 902 are respectively provided at different positions on the moving mold 1. The second sensing rod 901 can trigger the second sensing switch 902.

[0046] Reference Figure 10 and Figure 11 The fixed mold 2 is also provided with an ejection mechanism 10 for ejecting the molded deep cavity product. The ejection mechanism 10 includes an ejection plate 1001 and a plurality of ejection rods provided on the ejection plate 1001. An ejection drive is connected to the ejection plate 1001. The ends of the ejection rods can extend into the cavity. A third sensing component 11 is connected to the ejection plate 1001. The third sensing component 11 includes a third sensing rod 1101 provided on the ejection plate 1001. A third sensing switch 1102 is provided on the side of both the fixed mold 2 and the moving mold 1. The third sensing rod 1101 can trigger the third sensing switch 1102. The first sensing component 7, the second sensing component 9 and the third sensing component 11 are all electrically connected to the controller. The controller controls the stroke of the moving mold 1, the undercut core-pulling mechanism 8 and the action sequence between the ejection mechanism 10 according to the signals fed back by the first sensing component 7, the second sensing component 9 and the third sensing component 11. Specifically, the controller is connected to the injection molding machine signal to control the injection timing.

[0047] When using this application, the following steps are included: I. Mold Closing Process: The moving mold 1 moves towards the fixed mold 2. The inclined guide post 102 on the moving mold 1 is inserted into the inclined through hole 501a of the side core 5, driving the sliding block 501 and the core block 502 to slide towards the fixed mold core 4. As the moving mold 1 is fully closed, the guide inclined surface 101 on it presses against the wear-resistant guide block 603. The connecting rod 601 overcomes the elastic force of the elastic reset part 604 and pushes the molding insert 6 to extend into the cavity. At this time, the end of the connecting rod 601 near the guide inclined surface 101 is embedded in the positioning groove 101a to achieve mechanical deadlock, ensuring that the insert 602 is in place and ensuring the injection molding effect. Finally, the moving mold core 3, the fixed mold core 4, multiple side cores 5, the molding insert 6, and the undercut core-pulling block 803 together form a complete deep cavity. Multiple sets of first sensing components 7 feed back multiple side core 5 return signals, and then the injection molding machine begins to perform injection molding.

[0048] II. Mold Opening Process: The moving mold 1 begins to retract, and the guide slope 101 releases the clamping force on the wear-resistant guide block 603. Since the positioning groove 101a is set along the direction of the guide slope 101, under the instantaneous pre-tightening force of the elastic reset member 604, the connecting rod 601 generates axial sliding relative to the side core 5. At this time, since the inclined guide post 102 is still in the core-pulling avoidance stroke in the inclined through hole 501a (that is, the side core 5 has not been forcibly pulled outward), the large area sidewall of the side core 5 has not been displaced. Through the movement margin provided by the positioning groove 101a for the connecting rod 601, the asynchronous demolding of the molding insert 6 is achieved before the side core 5, ensuring that small local features such as buckles are removed from the product first, eliminating the lateral tearing that may occur when the large slider moves later.

[0049] Then the moving mold 1 continues to retreat, and the inclined guide post 102 forces the entire sliding block 501 to slide outward through the inclined through hole 501a. The core block 502 moves synchronously away from the fixed mold core 4, completing the complete demolding of the large projected area side wall of the deep cavity product. The first induction switch 702 receives the signal from the first induction rod 701, confirms that the core is pulled in place, and completes the synchronous core pulling of all side cores.

[0050] III. Inverted Core Pulling Process: After receiving the signal from the first sensing component 7, the controller starts the core pulling drive 801. The core pulling guide block 802 moves axially and drives the inverted core pulling block 803 to retract obliquely inward through the T-shaped guide groove, completing the demolding of the product's inner cavity by inverting. The second sensing component 9 monitors its stroke in real time to determine the progress of the inverted core pulling.

[0051] IV. Ejection Process: After receiving signals from the first sensing component 7 and the second sensing component 9, the controller confirms that the side core 5 and the internal undercut core-pulling block 803 have all been safely withdrawn. Then, the ejection drive on the fixed mold 2 side is activated, pushing the ejection plate 1001 and the ejection rod to eject the injection molded product. The third sensing rod 1101 triggers the third sensing switch 1102 located on the side of the mold, which provides feedback that the ejection mechanism 10 has been ejected into place, and the robot arm picks up the part.

[0052] After completing the above actions, the reset cycle begins. Finally, the controller commands the ejection mechanism 10 and the undercut core-pulling mechanism 8 to reset, preparing for the next mold closing cycle.

[0053] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A deep-cavity product injection mold, characterized in that, The mold includes a moving mold (1) and a fixed mold (2). The moving mold (1) and the fixed mold (2) are respectively provided with a moving mold core (3) and a fixed mold core (4). The moving mold core (3) and the fixed mold core (4) are offset in the mold-closing direction. Multiple side cores (5) are slidably disposed on the fixed mold (2), and these side cores (5) are distributed circumferentially on the outer side of the fixed mold core (4). When the mold is closed, the moving mold core (3), the fixed mold core (4), and the multiple side cores (5) together form a cavity for molding deep-cavity products. The moving mold (1) is provided with a guide slope (101), which is used to drive the multiple side cores... The side core (5) slides synchronously toward or away from the fixed core (4); the side core (5) is provided with a plurality of molding inserts (6) that can slide relative to it, one end of the molding insert (6) is connected to the guide slope (101), and the other end of the molding insert (6) extends into the cavity. An elastic reset member (604) is provided between the molding insert (6) and the side core (5). During the mold opening process, under the action of the elastic reset member (604), the molding insert (6) performs a demolding action away from the cavity in priority over the side core (5), so that the molding insert (6) detaches from the local features of the product first.

2. The deep cavity product injection mold according to claim 1, characterized in that: The moving mold (1) has a plurality of grooves (103) at one end near the fixed mold (2), and the guide slope (101) is provided in the grooves (103). The side core (5) has a slope that matches the guide slope (101) on its outer side. The moving mold (1) has a slanted guide post (102) at one end near the fixed mold (2). The slanted guide post (102) can be inserted into the side core (5), and the inclination angle of the slanted guide post (102) matches the angle of the guide slope (101).

3. A deep cavity product injection mold according to claim 2, characterized in that: Multiple side cores (5) are independently slidably disposed on the fixed mold (2). Each of the multiple side cores (5) is provided with at least one inclined guide post (102) and at least one guide inclined surface (101) so that the multiple side cores (5) can slide synchronously under the drive of the moving mold (1).

4. A deep cavity product injection mold according to claim 2, characterized in that: The side core (5) includes a sliding block (501) slidably connected to the fixed mold (2) and a core block (502) fixed to the front end of the sliding block (501). The sliding block (501) is provided with an inclined through hole (501a) that matches the angle and diameter of the inclined guide post (102). The inner side of the core block (502) matches the shape of the cavity, and the outer side of the core block (502) is provided with an inclined surface that matches the angle of the guide inclined surface (101).

5. A deep cavity product injection mold according to claim 4, characterized in that: The sliding block (501) is provided with a first sensing component (7) for monitoring the sliding position of the side core (5). The first sensing component (7) includes a first sensing rod (701) connected to the sliding block (501) and a first sensing switch (702) provided on the fixed mold (2). There are two first sensing switches (702). When the side core (5) slides to a preset position, the first sensing rod (701) triggers the first sensing switch (702).

6. A deep cavity product injection mold according to claim 1, characterized in that: The molded insert (6) includes a connecting rod (601) that passes through the side core (5). One end of the connecting rod (601) is connected to an insert (602), and the other end of the connecting rod (601) is connected to a wear-resistant guide block (603). The wear-resistant guide block (603) has an inclined surface that matches the angle of the guide slope (101). The elastic reset member (604) is provided between the wear-resistant guide block (603) and the side core (5). The elastic reset member (604) is used to provide a preload force to make the molded insert (6) slide closer to the guide slope (101).

7. A deep cavity product injection mold according to claim 6, characterized in that: The end of the connecting rod (601) away from the insert (602) extends through the wear-resistant guide block (603) and is inclined. A positioning groove (101a) is provided on the guide inclined surface (101) corresponding to the position of the connecting rod (601). The positioning groove (101a) is provided along the inclined direction of the guide inclined surface (101). One end of the positioning groove (101a) is provided with a rounded corner or chamfer. The other end of the positioning groove (101a) can be connected to the end side of the connecting rod (601).

8. A deep cavity product injection mold according to claim 5, characterized in that: The moving mold (1) is provided with an undercut core-pulling mechanism (8) and the undercut core-pulling mechanism (8) is located inside the moving mold core (3). The undercut core-pulling mechanism (8) includes a core-pulling drive (801) provided on the moving mold (1). A core-pulling guide block (802) is connected to the core-pulling drive (801). The end of the core-pulling guide block (802) is provided with a T-shaped guide groove and an undercut core-pulling block (803) is slidably connected through the T-shaped guide groove. The undercut core-pulling block (803) is used for internal undercutting of the molded product and performing demolding action. A second sensing component (9) for detecting the position of the core-pulling guide block (802) is connected to the core-pulling guide block (802). The second sensing component (9) includes a second sensing rod (901) and a second sensing switch (902). The second sensing rod (901) is connected to the core-pulling guide block (802). There are two second sensing switches (902), and the two second sensing switches (902) are respectively set at different positions on the moving mold (1). The second sensing rod (901) can trigger the second sensing switch (902).

9. A deep cavity product injection mold according to claim 8, characterized in that: The fixed mold (2) is also provided with an ejection mechanism (10) for ejecting the molded deep cavity product. The ejection mechanism (10) includes an ejection plate (1001) and a plurality of ejection rods provided on the ejection plate (1001). An ejection drive is connected to the ejection plate (1001). The ends of the ejection rods can extend into the cavity. A third sensing component (11) is connected to the ejection plate (1001). The third sensing component (11) includes a third sensing rod (1101) provided on the ejection plate (1001). A third sensing switch (1102) is provided on the side of both the fixed mold (2) and the moving mold (1). The third sensing rod (1101) can trigger the third sensing switch (1102).

10. A deep cavity product injection mold according to claim 9, characterized in that: The first sensing component (7), the second sensing component (9) and the third sensing component (11) are all electrically connected to the controller. The controller controls the stroke of the moving mold (1), the timing of the actions of the undercut core pulling mechanism (8) and the ejection mechanism (10) according to the signals fed back by the first sensing component (7), the second sensing component (9) and the third sensing component (11).

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