A dual mode core-pulling injection mold

Abstract

The application relates to a double-mold core-pulling injection mold, which comprises a matched upper mold and lower mold, the upper mold and the lower mold are symmetrically provided with a pair of mold cavities, and a synchronous core-pulling mechanism, a lateral core-pulling mechanism and an ejection mechanism are arranged between the upper mold and the lower mold. The synchronous core-pulling mechanism drives synchronous core-pulling guide blocks to move through synchronous core-pulling drive, and the two side inclined guide parts drive the synchronous core-pulling blocks to realize synchronous composite inclined core-pulling of the double-mold cavities; the lateral core-pulling mechanism is adapted to end part reverse-docking core-pulling, the ejection mechanism comprises a straight ejection mechanism and an inclined ejection mechanism, and the straight ejection mechanism and the inclined ejection mechanism respectively realize smooth ejection and middle reverse-docking demolding. The synchronous core-pulling mechanism, the lateral core-pulling mechanism and the ejection mechanism are respectively provided with sensing components and are electrically connected, so that linkage control is realized. The application has the advantages of compact structure, good action synchronism, the ability to adapt to multidirectional core-pulling and demolding requirements of plastic parts with complex structures, improved forming precision of the plastic parts, mold operation stability and automation level, and reduced failure rate.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a dual-mold core-pulling 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 continues to increase its requirements for the dimensional accuracy, surface quality, production efficiency, and molding stability of large injection molded parts, the requirements for large injection molds are also becoming higher and higher.

[0003] For injection molded parts with complex structures such as undercuts, folded edges, and through holes, traditional injection molds usually require separate core-pulling or ejection mechanisms for each structure. This approach has problems such as complex mold structure, many parts, and asynchronous movement, which can easily lead to product tearing and deformation. Furthermore, the core-pulling direction is limited, making it difficult to adapt to demolding requirements at special angles. The synchronization and stability of multi-cavity molds are also poor. Moreover, modern injection molds usually have a dual-cavity structure, which makes demolding even more complicated.

[0004] Existing technologies also include some structures capable of simultaneously pulling cores from two mold cavities. For example, Chinese Patent CN110450358B, published on September 21, 2021, discloses an injection mold with a double core-pulling structure. The mold body includes a mold body composed of a fixed mold and a moving mold. The mold body has a first cavity and a second cavity that are symmetrically arranged on the left and right sides. The mold body has a first core-pulling structure and a second core-pulling structure. In the mold-opening state, the third slider synchronously drives the first slider and the second slider to slide. The first slider slides inward along the first protrusion and slides in the direction of movement of the third slider at the same time. The second slider slides inward along the second protrusion and slides in the direction of movement of the third slider at the same time.

[0005] However, the first and second core-pulling structures in this application can only pull cores in the same plane. For complex structural parts with special angles, there are still defects such as poor adaptability and insufficient synchronization. Therefore, it is necessary to design a dual-mold core-pulling injection mold that can realize oblique core pulling at special angles. Summary of the Invention

[0006] This application provides a dual-mold core-pulling injection mold capable of achieving oblique core pulling at a special angle.

[0007] The dual-mold core-pulling injection mold provided in this application adopts the following technical solution:

[0008] A dual-mold core-pulling injection mold includes an upper mold and a lower mold that cooperate with each other. The upper mold and the lower mold have a pair of cavities symmetrically arranged with their central vertical plane as the symmetry plane. A synchronous core-pulling mechanism is provided between the upper mold and the lower mold. The synchronous core-pulling mechanism includes a synchronous core-pulling drive and a synchronous core-pulling guide block connected to the synchronous core-pulling drive. The synchronous core-pulling guide block has guide parts on both sides facing the cavity and is slidably connected to the synchronous core-pulling block through the guide parts. The end of the synchronous core-pulling block extends into the cavity. The guide parts are inclined and have an angle with both the horizontal and vertical directions. A lateral core-pulling mechanism and an ejection mechanism corresponding to the cavity are also provided between the upper mold and the lower mold. The lateral core-pulling mechanism and the ejection mechanism are both provided in pairs. A first sensing component is connected to the synchronous core-pulling guide block. A second sensing component and a third sensing component are respectively connected to the lateral core-pulling mechanism and the ejection mechanism. The first sensing component, the second sensing component, and the third sensing component are electrically connected to each other.

[0009] Preferably, the upper mold includes an upper template and an upper mold core plate, and the lower mold includes a lower mold core plate, an ejector plate, a hot runner plate, and a lower template. The shape of the upper mold core plate corresponds to the shape of the cavity. A positioning slider is slidably connected to the lower mold core plate. The positioning slider is located outside the cavity. A positioning protrusion is provided on the side of the positioning slider near the cavity. There are multiple positioning protrusions, and the size and position of the multiple positioning protrusions are different. An inclined surface is provided on the side of the positioning slider away from the cavity and it connects with the upper mold core plate through the inclined surface. A groove corresponding to the positioning protrusion is provided on the upper mold core plate.

[0010] Preferably, a movable core is slidably disposed on the lower model core plate. The shape of one side of the movable core matches the shape of the cavity, and an inclined surface is provided on the other side of the movable core. The upper model core plate is provided with an inclined portion corresponding to the inclined surface of the movable core, and the upper model core plate can push the movable core to move toward the direction closer to the cavity through the inclined portion.

[0011] Preferably, the synchronous core-pulling guide block is a T-shaped block, and the guide portion is provided on both sides of the synchronous core-pulling guide block. The guide portion is a T-shaped groove, and the guide portion is inclined downward and forms an acute angle with the length direction of the synchronous core-pulling guide block.

[0012] Preferably, the output end of the synchronous core pulling drive is provided with a T-shaped connecting block and is connected to the lower end of the synchronous core pulling guide block through the T-shaped connecting block. Elastic guide blocks are provided on both sides of the T-shaped connecting block. The setting direction of the elastic guide blocks is perpendicular to the direction of the T-shaped connecting block. The contact surface between the elastic guide block and the T-shaped connecting block is an inclined surface.

[0013] Preferably, the first sensing component includes a first sensing rod disposed on the synchronous core-pulling guide block, and a first sensing switch and a second sensing switch are disposed on the outer side of the lower mold. The first sensing switch and the second sensing switch are respectively disposed on one side above and below the first sensing rod and on one side to the left and right of the first sensing rod.

[0014] Preferably, the lateral core-pulling mechanism includes a linear core-pulling assembly and an oblique core-pulling assembly. The second sensing assembly is connected to both the linear core-pulling assembly and the oblique core-pulling assembly. The second sensing assembly includes a second sensing rod, which is connected to the core-pulling block of the linear core-pulling assembly. A third sensing switch and a fourth sensing switch are provided on the side of the end of the second sensing rod, and the second sensing rod can be connected to the third sensing switch and the fourth sensing switch.

[0015] Preferably, the ejection mechanism includes a straight ejection mechanism and an angled ejection mechanism. The straight ejection mechanism includes multiple straight ejector rods, the upper end of which is provided with a straight ejector core block that matches the cavity, and the lower end of which is connected to the ejection plate. The angled ejection mechanism includes a fixed block, an inclined groove is provided in the fixed block, and a slider is slidably connected in the groove. An angled ejector rod is rotatably connected to the slider, and the upper end of the angled ejector rod is provided with an angled ejector core block that matches the cavity. The lower mold core plate and the ejection plate are provided with waist-shaped through holes corresponding to the positions of the angled ejector rods.

[0016] Preferably, the inclined core block is provided with a clearance through hole for the straight rod to pass through, and the clearance through hole is an oblong hole.

[0017] Preferably, the ejector plate includes a first ejector plate and a second ejector plate, which are respectively connected to the straight ejector mechanism and the inclined ejector mechanism. The third sensing component includes a third sensing rod, a fifth sensing switch and a sixth sensing switch. The third sensing rod is connected to the first ejector plate, and the fifth and sixth sensing switches are respectively disposed on the lower model core plate and the lower template.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] This application utilizes a synchronous core-pulling mechanism between the upper and lower molds to achieve simultaneous core-pulling of the side through holes in dual-cavity injection molded parts. This ensures high consistency in the core-pulling actions on both sides, preventing deformation or tearing of the injection molded parts due to uneven force. Simultaneously, in conjunction with paired side core-pulling and ejection mechanisms, it meets the multi-directional and multi-angle demolding requirements of complex injection molded parts. By setting up a first, second, and third sensing component and electrically connecting them, the movement positions of each mechanism can be detected and controlled in real time. This ensures that the core-pulling, side core-pulling, and ejection actions are executed sequentially according to a preset timing sequence, effectively preventing motion interference between mechanisms, improving mold operation stability and automation, and reducing the failure rate.

[0020] By sliding a positioning slider and a movable core on the lower mold core plate, the positioning slider is equipped with multiple positioning protrusions of different sizes and positions. At the same time, the upper mold core plate is equipped with grooves corresponding to the positioning protrusions, which can accurately position the injection molded part, improving the dimensional accuracy and molding consistency of the injection molded part. The positioning slider cooperates with the upper mold core plate through the inclined surface. When the mold is closed, the upper mold core plate pushes the positioning slider to automatically feed into place, and when the mold is opened, it is automatically released. No additional driving components are required, which simplifies the mold structure, reduces manufacturing costs, and improves the continuity of mold opening and closing.

[0021] By setting the synchronous core-pulling guide block as a T-shaped block, with its two sides featuring a downward-sloping T-shaped groove structure, stable guidance is ensured to prevent derailment. T-shaped connecting blocks and elastic guide blocks are installed on the core-pulling guide block to buffer shocks and compensate for gaps during transmission. The elastic guide blocks are positioned perpendicular to the T-shaped connecting blocks to ensure stable support under force in all directions. A first sensing rod is installed on the synchronous core-pulling guide block, and a first and second sensing switches are installed on the lower mold to detect the core-pulling position from multiple angles, ensuring accurate and reliable judgment and providing precise signals for linkage control, further enhancing the safety of mold operation.

[0022] By setting up straight core-pulling components and angled core-pulling components, it is adapted to multi-directional undercut demolding; with independent sensing detection, it ensures that the core is pulled into place before ejection, improving demolding stability; by setting up straight ejection components and angled ejection components, combined with the separate first ejection plate and second ejection plate ejection mechanism, it takes into account both planar ejection and undercut demolding, with reasonable structure, sufficient movement space, and smooth ejection without interference. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the injection molded part in a preferred embodiment of this application.

[0024] Figure 2 This is a structural schematic diagram of the injection molded part from another perspective in a preferred embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the structure of the dual-mold core-pulling injection mold in a preferred embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the structure of the lower model core plate in a preferred embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the lateral core-pulling mechanism in a preferred embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the ejection mechanism in a preferred embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the structure of the second sensing component in a preferred embodiment of this application.

[0030] Figure 8 This is a front view of the synchronous core-pulling mechanism in a preferred embodiment of this application.

[0031] Figure 9 This is a top view of the synchronous core-pulling mechanism in a preferred embodiment of this application.

[0032] Figure 10 This is a side view of the synchronous core-pulling mechanism in a preferred embodiment of this application after removing one side of the elastic guide block.

[0033] Figure 11 This is a schematic diagram of the inclined jack mechanism in a preferred embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Synchronous core pulling mechanism; 101. Synchronous core pulling drive; 101a. T-shaped connecting block; 101b. Elastic guide block; 102. Synchronous core pulling guide block; 102a. Guide part; 103. Synchronous core pulling block; 2. Lateral core pulling mechanism; 201. Linear core pulling assembly; 202. Angled core pulling assembly; 3. Ejection mechanism; 301. Straight ejection mechanism; 301a. Straight ejection rod; 302. Angled ejection mechanism; 302a. Fixing block; 302b. Slider; 302c. Angled ejection rod; 4. 1. First sensing component; 401. First sensing rod; 402. First sensing switch; 403. Second sensing switch; 5. Second sensing component; 501. Second sensing rod; 502. Third sensing switch; 503. Fourth sensing switch; 6. Upper template; 7. Upper model core plate; 8. Lower model core plate; 801. Positioning slider; 801a. Positioning protrusion; 802. Movable core; 9. Ejector plate; 901. First ejector plate; 902. Second ejector plate; 10. Hot runner plate; 11. Lower template. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] This application discloses a dual-mold core-pulling injection mold.

[0037] Reference Figures 1 to 10A dual-mold core-pulling injection mold includes an upper mold and a lower mold that cooperate with each other. The upper and lower molds have paired cavities symmetrically arranged with their central vertical plane as the symmetrical plane. A synchronous core-pulling mechanism 1 is provided between the upper and lower molds. The synchronous core-pulling mechanism 1 includes a synchronous core-pulling drive 101, a synchronous core-pulling guide block 102 connected to the synchronous core-pulling drive 101, and guide portions 102a provided on both sides of the synchronous core-pulling guide block 102 facing the cavity. A synchronous core-pulling block 103 is slidably connected to the guide portions 102a. The ends of the synchronous core-pulling blocks 103 are... The guide part 102a is inclined and has an angle with both the horizontal and vertical directions. A side core pulling mechanism 2 and an ejection mechanism 3 corresponding to the cavity are also provided between the upper mold and the lower mold. The side core pulling mechanism 2 and the ejection mechanism 3 are provided in pairs. A first sensing component 4 is connected to the synchronous core pulling guide block 102. A second sensing component 5 and a third sensing component are respectively connected to the side core pulling mechanism 2 and the ejection mechanism 3. The first sensing component 4, the second sensing component 5 and the third sensing component are electrically connected to each other.

[0038] Reference Figure 3 and Figure 4 The upper mold includes an upper template 6 and an upper mold core plate 7, and the lower mold includes a lower mold core plate 8, an ejector plate 9, a hot runner plate 10, and a lower template 11. The shape of the upper mold core plate 7 corresponds to the shape of the cavity. A positioning slider 801 is slidably connected to the lower mold core plate 8. The positioning slider 801 is located on the outside of the cavity. A positioning protrusion 801a is provided on the side of the positioning slider 801 closest to the cavity. There are multiple positioning protrusions 801a, and the size and position of the multiple positioning protrusions 801a are different. An inclined surface is provided on the side of the positioning slider 801 away from the cavity, and the inclined surface is connected to the cavity. The upper mold core plate 7 is connected to the upper mold core plate 801a. The upper mold core plate 7 is provided with a groove corresponding to the positioning protrusion 801a. During the mold opening and closing process, the positioning slider 801 is fixed to the upper mold core by the groove on the upper mold core plate 7 and the positioning protrusion 801a. This improves the dimensional accuracy and molding consistency of the injection molded part and ensures the molding effect of the side of the injection molded part. At the same time, since the two are connected by inclined surfaces, the positioning slider 801 is automatically fed into place by the upper mold core plate 7 when the mold is closed and automatically released when the mold is opened. No additional driving components are required, which improves the continuity of mold opening and closing.

[0039] Reference Figure 4 A movable core 802 is slidably disposed on the lower model core plate 8. The shape of one side of the movable core 802 matches the shape of the cavity, and an inclined surface is provided on the other side of the movable core 802. An inclined part corresponding to the inclined surface of the movable core 802 is provided on the upper model core plate 7, and the upper model core plate 7 can push the movable core 802 to move toward the direction closer to the cavity through the inclined part.

[0040] Reference Figures 7 to 10The synchronous core-pulling guide block 102 is a T-shaped block. Guide portions 102a are provided on both sides of the synchronous core-pulling guide block 102. Each guide portion 102a is a T-shaped groove. The guide portions 102a are inclined downwards and form an acute angle with the length direction of the synchronous core-pulling guide block 102. Specifically, in this embodiment, the guide portion 102a is a T-shaped groove, inclined downwards, and facing the side of the synchronous core-pulling guide block 102. The synchronous core-pulling block 103 and the synchronous core-pulling guide block 102... An acute angle is formed between the blocks 102. A T-shaped connecting block 101a is provided on the output end of the synchronous core pulling drive 101 and is connected to the lower end of the synchronous core pulling guide block 102 through the T-shaped connecting block 101a. Elastic guide blocks 101b are provided on both sides of the T-shaped connecting block 101a. The setting direction of the elastic guide blocks 101b is perpendicular to the direction of the T-shaped connecting block 101a. A spring is provided on the side of the elastic guide blocks 101b that is far away from each other. The contact surface between the elastic guide block 101b and the T-shaped connecting block 101a is an inclined surface.

[0041] Reference Figure 7 and Figure 8 The first sensing component 4 includes a first sensing rod 401 disposed on the synchronous core-pulling guide block 102. A first sensing switch 402 and a second sensing switch 403 are disposed on the outer side of the lower mold. The first sensing switch 402 and the second sensing switch 403 are respectively disposed on one of the upper and lower sides and one of the left and right sides of the first sensing rod 401. Specifically, in this embodiment, the first sensing switch 402 and the second sensing switch 403 are respectively disposed on the upper side and the right side of the first sensing rod 401. The cross-section of the first sensing rod 401 is polygonal and multiple sides of the first sensing rod 401 can be connected to the first sensing switch 402 and the second sensing switch 403 respectively, so as to realize multi-directional detection of the core-pulling position and accurate and reliable judgment.

[0042] Reference Figure 6 and Figure 7 The lateral core-pulling mechanism 2 includes a straight core-pulling assembly 201 and an oblique core-pulling assembly 202. A second sensing assembly 5 is connected to both the straight core-pulling assembly 201 and the oblique core-pulling assembly 202. The second sensing assembly 5 includes a second sensing rod 501, which is connected to the core-pulling block of the straight core-pulling assembly 201. A third sensing switch 502 and a fourth sensing switch 503 are provided on the side of the end of the second sensing rod 501, and the second sensing rod 501 can be connected to the third sensing switch 502 and the fourth sensing switch 503.

[0043] Reference Figure 7 and Figure 11The ejection mechanism 3 includes a straight ejection mechanism 301 and an inclined ejection mechanism 302. The straight ejection mechanism 301 includes multiple straight ejector rods 301a. The upper end of each straight ejector rod 301a is provided with a straight ejector core block that matches the cavity. The lower end of each straight ejector rod 301a is connected to the ejection plate 9. The inclined ejection mechanism 302 includes a fixed block 302a. An inclined groove is provided in the fixed block 302a, and a slider 302b is slidably connected in the groove. An inclined ejector rod 302c is rotatably connected to the slider 302b. The upper end of the inclined ejector rod 302c is provided with an inclined ejector core block that matches the cavity. The lower mold core plate 8 and the ejection plate 9 are provided with waist-shaped through holes corresponding to the positions of the inclined ejector rods 302c. Figure 5 The inclined core block is provided with a clearance through hole for the straight rod 301a to pass through. The clearance through hole is a waist-shaped hole.

[0044] Reference Figure 3 and Figure 4 The ejector plate 9 includes a first ejector plate 901 and a second ejector plate 902. The first ejector plate 901 and the second ejector plate 902 are respectively connected to the straight ejector mechanism 301 and the inclined ejector mechanism 302. The third sensing component includes a third sensing rod, a fifth sensing switch and a sixth sensing switch. The third sensing rod is connected to the first ejector plate 901. The fifth sensing switch and the sixth sensing switch are respectively set on the lower model core plate 8 and the lower template 11. Specifically, in this embodiment, the first sensing switch 402, the second sensing switch 403, the third sensing switch 502, the fourth sensing switch 503, the fifth sensing switch and the sixth sensing switch are all electrically connected through a controller.

[0045] This application utilizes a synchronous core-pulling mechanism 1 between the upper and lower molds to achieve synchronous core-pulling of the side through holes of the dual-cavity injection molded parts. This ensures high consistency in the core-pulling actions on both sides, preventing deformation or tearing of the injection molded parts due to uneven force. Simultaneously, in conjunction with paired side core-pulling mechanisms 2 and ejection mechanisms 3, it meets the multi-directional and multi-angle demolding requirements of complex injection molded parts. By setting a first sensing component 4, a second sensing component 5, and a third sensing component and electrically connecting them, the movement positions of each mechanism can be detected and controlled in real time. This ensures that the core-pulling, side core-pulling, and ejection actions are executed sequentially according to a preset time sequence, effectively preventing motion interference between mechanisms, improving mold operation stability and automation, and reducing the failure rate.

[0046] In use, the upper and lower molds are pressed together in the mold-closed state. The synchronous core-pulling mechanism 1, the side core-pulling mechanism 2, the angled ejector mechanism 302, and the straight ejector mechanism 301 are all in the reset position. The synchronous core-pulling block 103 extends into the two cavities to form the through hole structure on the side of the injection molded part. The core-pulling block of the side core-pulling mechanism 2 extends into the end of the cavity to form the undercut structure at the end of the injection molded part. The angled ejector core block of the angled ejector mechanism 302 extends into the middle position of the cavity to form the undercut structure in the middle of the injection molded part. The straight ejector mechanism 301 works with the upper mold core plate 7 and the lower mold core plate 8 to complete the closed molding of the cavity. The various mechanisms work together to form a complete molded cavity.

[0047] The injection molding system injects molten plastic into the cavity. After holding pressure and cooling, the mold begins to open. First, the upper mold moves upward and gradually separates from the lower mold. The upper mold core plate 7 moves upward synchronously with the upper mold, releasing the clamping effect on the positioning slider 801 and the movable core 802. Subsequently, the synchronous core-pulling drive 101 is activated, driving the synchronous core-pulling guide block 102 to move upward. The guide parts 102a on both sides of the synchronous core-pulling guide block 102 slide and engage with the synchronous core-pulling block 103, driving the synchronous core-pulling blocks 103 on both sides to make a compound oblique movement away from the cavity at the same time. This achieves synchronous core-pulling of the side through holes of the injection molded parts in the two cavities, ensuring that the core-pulling actions on both sides are synchronized and consistent, and avoiding deformation caused by uneven force on the injection molded parts.

[0048] After the synchronous core-pulling mechanism 1 completes the core-pulling action, the lateral core-pulling mechanism 2 is activated, driving the core-pulling block to move along a preset direction to complete the core-pulling demolding of the undercut at the end of the injection molded part. After the lateral core-pulling is in place, the ejection mechanism 3 starts to operate. The first ejection plate 901 and the second ejection plate 902 respectively drive the straight ejection mechanism 301 and the inclined ejection mechanism 302 to move upward. While ejecting upward, the inclined ejection mechanism 302 moves laterally along the inclined slide to complete the demolding of the undercut in the middle of the injection molded part. The straight ejection mechanism 301 is pushed upward smoothly by the ejection plate 9, and together with the inclined ejection mechanism 302, the injection molded part is smoothly ejected from the lower mold core plate 8, realizing the complete demolding of the injection molded part.

[0049] When the mold is closed, the upper mold moves downward, first pushing the movable core 802 and the positioning slider 801 to reset. Then, the ejector mechanism 3 drives the straight ejector mechanism 301 and the inclined ejector mechanism 302 to reset. The side core pulling mechanism 2 and the synchronous core pulling mechanism 1 reset in sequence. Under the linkage control of the first sensing component 4, the second sensing component 5 and the third sensing component, each mechanism completes the reset action according to the preset timing. After the upper mold and the lower mold are completely closed, the next injection cycle begins, ensuring the continuous and stable operation of the mold.

[0050] 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 dual-mold core-pulling injection mold, characterized in that: The upper mold and the lower mold are designed to cooperate with each other. The upper mold and the lower mold are symmetrically arranged with their central vertical plane as the symmetrical surface and have a pair of cavities. The upper mold includes an upper template (6) and an upper mold core plate (7). The lower mold includes a lower mold core plate (8), an ejector plate (9), a hot runner plate (10) and a lower template (11). The shape of the upper mold core plate (7) corresponds to the shape of the cavity. A positioning slider (801) is slidably connected to the lower mold core plate (8). The positioning slider (801) is located outside the cavity. A positioning protrusion (801a) is provided on the side of the positioning slider (801) close to the cavity. There are multiple positioning protrusions (801a) and the size and position of the multiple positioning protrusions (801a) are different. An inclined surface is provided on the side of the positioning slider (801) away from the cavity and it is connected to the upper mold core plate (7) through the inclined surface. A groove corresponding to the positioning protrusion (801a) is provided on the upper mold core plate (7). A synchronous core-pulling mechanism (1) is provided between the upper mold and the lower mold. The synchronous core-pulling mechanism (1) includes a synchronous core-pulling drive (101), a synchronous core-pulling guide block (102) is connected to the synchronous core-pulling drive (101), a T-shaped connecting block (101a) is provided on the output end of the synchronous core-pulling drive (101) and is connected to the lower end of the synchronous core-pulling guide block (102) through the T-shaped connecting block (101a), and elastic guide blocks (101b) are provided on both sides of the T-shaped connecting block (101a). The setting direction of the elastic guide block (101b) is perpendicular to the direction of the T-shaped connecting block (101a). The contact surface between the elastic guide block (101b) and the T-shaped connecting block (101a) is an inclined surface. The synchronous core pulling guide block (102) is provided with guide parts (102a) on both sides facing the cavity and the synchronous core pulling block (103) is slidably connected through the guide parts (102a). The end of the synchronous core pulling block (103) extends into the cavity. The guide parts (102a) are inclined and the guide parts (102a) are set with an angle to both the horizontal and vertical directions. A side core-pulling mechanism (2) and an ejection mechanism (3) corresponding to the cavity are also provided between the upper mold and the lower mold. The side core-pulling mechanism (2) and the ejection mechanism (3) are both provided in pairs. A first sensing component (4) is connected to the synchronous core-pulling guide block (102). A second sensing component (5) and a third sensing component are respectively connected to the side core-pulling mechanism (2) and the ejection mechanism (3). The first sensing component (4), the second sensing component (5) and the third sensing component are electrically connected to each other.

2. The dual-mold core-pulling injection mold according to claim 1, characterized in that: The lower model core plate (8) is slidably provided with a movable core (802). One side of the movable core (802) is shaped to match the shape of the cavity. The other side of the movable core (802) is provided with an inclined surface. The upper model core plate (7) is provided with an inclined part corresponding to the inclined surface of the movable core (802). The upper model core plate (7) can push the movable core (802) to move toward the direction closer to the cavity through the inclined part.

3. The dual-mold core-pulling injection mold according to claim 1, characterized in that: The synchronous core-pulling guide block (102) is a T-shaped block. The guide part (102a) is provided on both sides of the synchronous core-pulling guide block (102). The guide part (102a) is a T-shaped groove. The guide part (102a) is inclined downward and forms an acute angle with the length direction of the synchronous core-pulling guide block (102).

4. The dual-mold core-pulling injection mold according to claim 1, characterized in that: The first sensing component (4) includes a first sensing rod (401) disposed on the synchronous core-pulling guide block (102), and a first sensing switch (402) and a second sensing switch (403) disposed on the outer side of the lower mold. The first sensing switch (402) and the second sensing switch (403) are respectively disposed on one side above and below the first sensing rod (401) and one side to the left and right.

5. A dual-mold core-pulling injection mold according to claim 1, characterized in that: The lateral core-pulling mechanism (2) includes a straight core-pulling assembly (201) and an oblique core-pulling assembly (202). The straight core-pulling assembly (201) and the oblique core-pulling assembly (202) are both connected to the second sensing assembly (5). The second sensing assembly (5) includes a second sensing rod (501). The second sensing rod (501) is connected to the core-pulling block of the straight core-pulling assembly (201). The end side of the second sensing rod (501) is provided with a third sensing switch (502) and a fourth sensing switch (503), and the second sensing rod (501) can be connected to the third sensing switch (502) and the fourth sensing switch (503).

6. A dual-mold core-pulling injection mold according to claim 1, characterized in that: The ejection mechanism (3) includes a straight ejection mechanism (301) and an inclined ejection mechanism (302). The straight ejection mechanism (301) includes multiple straight ejection rods (301a). The upper end of the straight ejection rod (301a) is provided with a straight ejection core block that matches the cavity. The lower end of the straight ejection rod (301a) is connected to the ejection plate (9). The inclined ejection mechanism (302) includes a fixed block (302a). The fixed block (302a) is provided with an inclined groove and a slider (302b) is slidably connected in the groove. An inclined ejection rod (302c) is rotatably connected on the slider (302b). The upper end of the inclined ejection rod (302c) is provided with an inclined ejection core block that matches the cavity. The lower mold core plate (8) and the ejection plate (9) are provided with waist-shaped through holes corresponding to the position of the inclined ejection rod (302c).

7. A dual-mold core-pulling injection mold according to claim 6, characterized in that: The inclined core block is provided with a clearance through hole for the straight push rod (301a) to pass through, and the clearance through hole is a waist-shaped hole.

8. A dual-mold core-pulling injection mold according to claim 6, characterized in that: The ejector plate (9) includes a first ejector plate (901) and a second ejector plate (902). The first ejector plate (901) and the second ejector plate (902) are respectively connected to the straight ejector mechanism (301) and the inclined ejector mechanism (302). The third sensing component includes a third sensing rod, a fifth sensing switch and a sixth sensing switch. The third sensing rod is connected to the first ejector plate (901). The fifth sensing switch and the sixth sensing switch are respectively set on the lower model core plate (8) and the lower template (11).

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