An internal core pulling mechanism for injection mold

Abstract

The present invention discloses an internal core pulling mechanism of an injection mold. A core pulling mechanism is arranged in a movable mold cavity to facilitate the injection molded part to be separated from the movable mold cavity in an open mold state. The core pulling mechanism includes a first support machine, an internal pull-out slider and a connecting rod. The first support machine is movably arranged on the movable mold plate and can reciprocate in the movable mold cavity. A first push surface is formed on the outside of the first support machine, and a guide pull surface is formed on the inside of the first support machine. The first push surface and the guide pull surface are parallel to each other, so as to jointly guide the internal pull-out slider to realize mold closing and resetting or pulling and demolding. One end of the connecting rod forms a fixed end and extends into the first support machine and cooperates with the guide pull surface. The other end of the connecting rod forms a connecting end and is flexibly connected to the core pulling slider. The core pulling slider can be slidably pressed against the first push surface. It can realize slight swinging and fine-tuning between the internal pull-out slider and the first connecting rod, greatly reducing the local extrusion force, making the internal pull-out slider slide smoothly, and reducing the risk of internal pull-out burning.

Description

Technical Field

[0001] The invention relates to a plastic mold structure, in particular to an inner core pulling mechanism of an injection mold. Background Art

[0002] Injection molding is a method of producing industrial products. The plastic mold used in the injection molding process is a tool that matches the plastic molding machine in the plastic processing industry and gives plastic products a complete configuration and precise size. Due to the wide variety of plastics and processing methods, and the varying structures of plastic molding machines and plastic products, there are also many types and structures of plastic molds.

[0003] The core pulling in the plastic mold is used to deal with the position on the parting surface of the injection molded part that cannot be demolded. It belongs to the "underhook processing system" and is a structure of the mold. Its main function is to ensure the smooth demolding of the product. It is also called a slider. For example, there is a hole on the side of the plastic part. After the mold is opened, if the core of the hole is not pulled out, the product cannot be ejected. At this time, the mold structure must adopt the structure of a slider, make the core of the hole movable, and use an inclined guide column to cooperate with the fixed mold. With the opening or closing of the mold, the slider moves. This movement is called core pulling. The traditional core pulling mechanism uses a T block to realize the connection and cooperation between the support machine and the inner pull slider. There are different force-bearing matching surfaces during the up / down movement. In the theoretical design, all matching surfaces are fitted, but errors are inevitable during processing, resulting in the movement process being too tight or too loose, or even stuck. The support machine and the inner pull are rigidly connected by a T block. When there is an error in the matching surface, the slider may be unevenly stressed and produce rotational extrusion. Extrusion will generate a lot of friction, and the friction will be concentrated in a local area rather than the entire mating surface. When the extrusion is severe, the internal pull-out force-bearing surface will inevitably wear out. In severe cases, sliding will be hindered, and the internal pull-out action will be stuck or burned. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an internal core pulling mechanism for an injection mold, which uses a first connecting rod instead of a T-block to achieve the connection and cooperation between the support machine and the internal pulling slider, and the first connecting rod and the internal pulling slider are flexibly connected to make the internal pulling slider slide smoothly, reducing the risk of internal pulling burning.

[0005] The object of the present invention is achieved by adopting the following technical scheme: an internal core pulling mechanism of an injection mold, comprising a fixed mold plate and a movable mold plate arranged relatively to each other, wherein a fixed mold cavity and a movable mold cavity are respectively formed in the fixed mold plate and the movable mold plate; the movable mold plate comprises a mold closing state and a mold opening state, when the movable mold plate is in the mold closing state, the movable mold plate moves toward the direction close to the fixed mold plate so that the movable mold cavity and the fixed mold cavity cooperate with each other to form a closed mold cavity for molding injection molded parts, when the movable mold plate is in the mold opening state, the movable mold plate moves toward the direction away from the fixed mold plate so that the movable mold cavity and the fixed mold cavity are separated from each other; a cavity is arranged in the movable mold cavity to facilitate the demolding of the injection molded parts in the mold opening state. A core-pulling mechanism for the movable mold cavity, the core-pulling mechanism comprising a first support, an inner pull-out slider and a connecting rod, the first support being movably arranged on the movable mold plate and being reciprocatingly movable in the movable mold cavity; a first push surface is formed on the outside of the first support, a guide pull surface is formed on the inside of the first support, the first push surface and the guide pull surface are parallel to each other, and are used to jointly guide the inner pull-out slider to achieve mold closing and resetting or pulling and demolding, one end of the connecting rod forms a fixed end and extends into the first support and cooperates with the guide pull surface, the other end of the connecting rod forms a connecting end and is flexibly connected to the inner pull-out slider, and the inner pull-out slider can slide against the first push surface. Further, the connecting rod is perpendicular to the first push surface and the guide pull surface respectively. Further, the movable template is provided with a second supporter, and the second supporter is formed with a second push surface that cooperates with the first push surface to guide the inner pull-out slider, one side of the inner pull-out slider is pressed against the first push surface, and the other side of the inner pull-out slider is pressed against the second push surface; the first push surface and the second push surface are perpendicular to each other. Further, the inner pull-out slider is formed with a core-pulling guide surface that guides and cooperates with the first push surface on the side opposite to the first push surface, and a driving hole is formed on the core-pulling guide surface, and the connecting rod extends into the driving hole and is hinged with the inner pull-out slider through a pin, and the rotation axis of the pin is perpendicular to the connecting rod. Further, a gap is formed between the driving hole and the connecting rod, so that the connecting rod and the inner pull-out slider can swing relative to each other around the rotation axis of the pin. Furthermore, a linkage hole penetrating through both ends of the first support machine is provided in the first support machine, one end of the linkage hole is connected to the first push surface, and the other end of the linkage hole passes through the guide pull surface and is connected to the outside of the first support machine; the connecting rod is connected to the linkage hole, and in the first direction, the inner diameter of the linkage hole is larger than the outer diameter of the connecting rod, so that the connecting rod can be located in the linkage hole to drive the inner pull-out slider to slide.Further, the linkage hole includes a first linkage section and a second linkage section connected to each other; the first linkage section is arranged at one end close to the first push surface, and the second linkage section is arranged at one end away from the first push surface. In the second direction, the inner diameter of the second linkage section is larger than that of the first linkage section, so that the step formed between the second linkage section and the first linkage section forms the guide pull surface. Further, the connecting rod includes a first rod section and a second rod section, the outer diameter of the second rod section is larger than that of the first rod section, and the step formed between the second rod section and the first rod section forms a pressing platform that presses against the guide pull surface. Further, a pad is arranged on the pressing platform. Further, a core-pulling hole connected to the movable mold cavity is opened at the bottom of the movable mold plate, and the first support machine is movably arranged in the core-pulling hole and passes through the core-pulling hole at both ends; a spring plate for driving the first support machine is arranged at the lower part of the movable mold plate, and the spring plate can reciprocate in the direction of approaching and moving away from the movable mold plate, and the first support machine passes through the bottom of the movable mold plate and is fixedly connected to the spring plate. Compared with the prior art, the beneficial effect of the present invention is that the driving force is converted from rigid friction drive to flexible drive by replacing the T-block connection with the first connecting rod. When the inner slider has a tendency to rotate and squeeze during the movement of the inner slider, the first connecting rod can achieve slight swinging and fine-tuning between the inner slider and the first connecting rod through the flexible connection with the inner slider, which greatly reduces the local squeezing force, makes the inner slider slide smoothly, and reduces the risk of internal burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the inner core pulling mechanism of the injection mold of the present invention;

[0007] Figure 2 It is a top view of the inner core pulling mechanism of the injection mold of the present invention;

[0008] Figure 3 for Figure 2 AA section view;

[0009] Figure 4 for Figure 2 CC section view;

[0010] Figure 5 for Figure 3 DD cross-sectional view.

[0011] In the figure: 10, movable template; 11, movable mold cavity; 12, core-pulling hole; 13, spring plate; 14, mounting groove; 20, first support machine; 21, first push surface; 22, guide pull surface; 23, linkage hole; 231, first linkage section; 232, second linkage section; 24, groove; 30, inner pull-out slider; 31, core-pulling guide surface; 32, driving hole; 33, pin; 40, connecting rod; 41, first rod section; 42, second rod section; 43, pressure platform; 50, second support machine; 51, second push surface. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0013] like Figure 1-Figure 4 As shown, in order to avoid the internal pulling slider 30 in the core pulling mechanism from burning and to allow it to slide more smoothly on the support machine, the present invention discloses an internal core pulling mechanism of an injection mold, the overall structure of which is basically consistent with the mold structure of the prior art, and mainly includes a fixed mold plate and a movable mold plate 10 arranged relatively to each other, and a fixed mold cavity and a movable mold cavity 11 are formed in the fixed mold plate and the movable mold plate 10, respectively. The movable mold plate 10 includes a mold closing state and a mold opening state. When the movable mold plate 10 is in the mold closing state, the movable mold plate 10 moves toward the direction close to the fixed mold plate so that the movable mold cavity 11 and the fixed mold cavity cooperate with each other to form a closed mold cavity for molding injection molded parts, for the external injection molding rod to inject rubber. When the movable mold plate 10 is in the mold opening state, the movable mold plate 10 moves toward the direction away from the fixed mold plate so that the movable mold cavity 11 and the fixed mold cavity are separated from each other, for the molded injection molded parts to be demolded. In order to solve the corresponding technical problems, a core-pulling mechanism is provided in the movable mold cavity 11 to facilitate the injection molded part to be separated from the movable mold cavity 11 in the mold opening state. Specifically, the core-pulling mechanism includes a first support machine 20, an inner pull-out slider 30 and a connecting rod 40. The first support machine 20 is movably arranged on the movable mold plate 10 and can reciprocate in the movable mold cavity 11. Specifically, the first support machine 20 can be lifted and lowered in the movable mold cavity 11, so that the first support machine 20 is lifted, and the inner pull-out slider 30 cooperates with the movable mold cavity 11 to form a mold cavity for molding plastic parts, or descends and drags the inner pull-out slider 30 away from the molded plastic part to partially demold the plastic part.

[0014] Furthermore, a first push surface 21 is formed on the outside of the first support 20, and a guide surface 22 is formed on the inside of the first support 20. The first push surface 21 and the guide surface 22 are parallel to each other, and together play a role in limiting the relative movement direction of the inner pull-out slider 30 and the first support 20, and play a role in pushing and resetting the mold or pulling and demolding the inner pull-out slider 30. During the lifting and lowering movement of the inner pull-out slider 30 in the movable mold cavity 11 when the first support 20 is located, the first push surface 21 and the guide surface 22 are respectively supported and guided, so that the inner pull-out slider 30 0 can move back and forth relatively along the guiding direction of the first push surface 21 and the guide pull surface 22, so as to achieve matching with the movable mold cavity 11 to form a mold cavity for molding the injection molded part and staggered separation from the injection molded part. In order to allow the inner pull-out slider 30 to slide back and forth more smoothly on the first push surface 21 and the guide pull surface 22, one end of the connecting rod 40 forms a fixed end and extends into the first support machine 20 and cooperates with the guide pull surface 22. The other end of the connecting rod 40 forms a connecting end and is flexibly connected to the inner pull-out slider. The connecting rod 40 and the first support machine 20 There is a space between the connecting rod 40 for moving along the guide direction of the first push surface 21 and the guide pull surface 22, so that the inner pull-out slider can slide against the first push surface 21. In this example, when the movable mold plate 10 is in the mold closing state, the first support machine 20 is in the highest position of the jacking, and the inner pull-out slider 30 is located at the lower edge of the first push surface 21. When the movable mold plate 10 is converted from the mold closing state to the mold opening state, the first support machine 20 is located in the movable mold cavity 11 and moves downward, and the connecting rod 40 drives the inner pull-out slider 30 along the first push surface 21. And it gradually slides in the upper direction of the guide pulling surface 22, so that the cavity surface of the inner pull-out slider 30 is separated from the injection molded part, and in this process, since the driving force is converted from rigid friction drive to flexible drive by replacing the T-block connection with the connecting rod 40, when the inner pull-out slider 30 has a tendency to rotate and extrude during movement, the connecting rod 40 can bring about a slight swing of the axis between the inner pull-out slider 30 and the connecting rod 40 through the flexible cooperation with the slider to achieve fine-tuning, which greatly reduces the local extrusion force, makes the slider slide smoothly, and reduces the risk of internal burning.

[0015] In order to ensure that the relative angle between the connecting rod 40 and the inner sliding block 30 remains consistent and to make the sliding of the inner sliding block 30 on the first pushing surface 21 more stable, the connecting rod 40 is perpendicular to the first pushing surface 21 and the guide pulling surface 22 respectively. The mutually parallel first pushing surface 21 and the guide pulling surface 22 can keep the connecting rod 40 in a relatively perpendicular state with the first pushing surface 21 and the guide pulling surface 22. In this way, when the inner sliding block 30 is driven by the connecting rod 40, a large deflection between the connecting rod 40 and the inner sliding block 30 can be avoided as much as possible.

[0016] In order to further improve the stability of the inner slide block 30, a second supporter 50 is provided on the movable plate 10. The second supporter 50 is formed with a second push surface 51 which cooperates with the first push surface 21 to guide the inner slide block 30. One side of the inner slide block 30 is pressed against the first push surface 21, and the other side of the inner slide block 30 is pressed against the second push surface 51.

[0017] The first push surface 21 and the second push surface 51 are perpendicular to each other. In the implementation of the present invention, when the movable template 10 switches back and forth between the mold closing state and the mold opening state, the second push surface 51 abuts against the other side surface of the inner pull-out slider 30. Specifically, the second push surface 51 and the first push surface 21 respectively abut against two adjacent side surfaces of the inner pull-out slider 30. During this process, the inner pull-out slider 30 slides back and forth on the second push surface 51 to improve the stability of the inner pull-out slider 30. In this example, in order to facilitate the replacement of components and reduce the cost of replacing components, a gasket is provided on the second support machine 50. The gasket is provided on one side of the second support machine 50 for forming the second push surface 51. When the second push surface 51 is worn, its process requirements can be met by replacing the gasket without replacing the second support machine 50 itself. A core-pulling guide surface 31 is formed on the side of the inner slide 30 opposite to the first push surface 21, and the core-pulling guide surface 31 is parallel to the first push surface 21 and can slide on the first push surface 21. A driving hole 32 is provided on the core-pulling guide surface 31. The connecting rod 40 extends into the driving hole 32 and is hingedly matched with the inner slide 30 through a pin 33. The rotation axis of the pin 33 and the connecting rod 40 are perpendicular to each other and form a "T" shape. A gap is formed between the driving hole 32 and the connecting rod 40, so that the connecting rod 40 and the inner slide 30 can swing relative to each other around the rotation axis of the pin 33, such as Figure 3 The first direction of the present invention is shown, and the direction in which the gap is opened is the upper edge and the lower edge of the driving hole 32 .

[0018] More specifically, a linkage hole 23 is provided in the first support 20 and passes through both ends of the first support 20. One end of the linkage hole 23 is connected to the first push surface 21, and the other end of the linkage hole 23 passes through the guide surface 22 and is connected to the outside of the first support 20. The connecting rod 40 is connected to the linkage hole 23. Figure 1 In the first direction, the inner diameter of the linkage hole 23 is larger than the outer diameter of the connecting rod 40, so that the connecting rod 40 can be located in the linkage hole 23 to drive the inner sliding block 30 to slide. Theoretically, during the displacement of the connecting rod 40 in the linkage hole 23, the relative angle between the connecting rod 40 and the linkage hole 23 remains unchanged.

[0019] The linkage hole 23 includes a first linkage section 231 and a second linkage section 232 connected to each other; the first linkage section 231 is arranged at one end close to the first push surface 21, and the second linkage section 232 is arranged at one end away from the first push surface 21. Figure 5In the second direction, the inner diameter of the second linkage section 232 is greater than that of the first linkage section 231 , so that the step formed between the second linkage section 232 and the first linkage section 231 forms the guide pulling surface 22 .

[0020] The connecting rod 40 includes a first rod section 41 and a second rod section 42. The outer diameter of the second rod section 42 is larger than the outer diameter of the first rod section 41. The step formed between the second rod section and the first rod section 41 forms a pressing platform 43 that presses against the guide pull surface 22. In order to facilitate the replacement of components, a pad is provided on the pressing platform 43. In order to facilitate the driving of the first supporting machine 20, a core-pulling hole 12 connected to the movable mold cavity 11 is provided at the bottom of the movable mold plate 10. The first supporting machine 20 is movably arranged in the core-pulling hole 12 and passes through the core-pulling hole 12 at both ends. A spring plate 13 for driving the first supporting machine 20 is provided at the lower part of the movable mold plate 10. The spring plate 13 can reciprocate in the direction of approaching and moving away from the movable mold plate 10. The first supporting machine 20 passes through the bottom of the movable mold plate 10 and is fixedly connected to the spring plate 13. The spring plate 13 can be connected to a driving mechanism such as a cylinder, an oil cylinder, and a spring to achieve the displacement of the first supporting machine 20 in the core-pulling hole 12. In this example, there are two inner slide blocks 30. Of course, multiple inner slide blocks 30 can be set to meet the demoulding process of complex injection molded parts while ensuring the same principle. The number of connecting rods 40 needs to be consistent with that of the inner slide blocks 30. The sliding directions of the two inner slide blocks 30 are different. Figure 3 As shown, in the first direction, an angle is formed between the first pushing surfaces 21 matched by the two inner sliding blocks 30, so that the first supporting machine 20 slides towards each other in the opposite directions during the descending process. Since one of the inner sliding blocks 30 has a smaller horizontal inclination angle, it does not need the guidance of the second supporting machine 50, and is used to separate different parts of the injection molded part. The working principles of the inner sliding blocks 30 are the same, which will not be described in detail here. When the movable template 10 switches from the mold opening state to the mold closing state, the spring plate 13 drives the first support machine 20 to apply a certain lifting force to the inner pull-out slider 30 through the connecting rod 40. At this time, the first pushing surface 21 of the first support machine 20 will apply a certain lifting force to the core pulling guide surface 31 of the inner pull-out slider 30. Due to the inclination of the first pushing surface 21, the inner pull-out slider 30 will slide up and down along the first pushing surface 21 and finally match the movable mold cavity 11. When the movable template 10 switches from the mold closing state to the mold opening state, the spring plate 13 drives the movable template 10 to descend. At this time, the guide pulling surface 22 of the first support machine 20 will apply a pushing force to the pressing platform 43 of the connecting rod 40, so that the connecting rod 40 pulls the inner pull-out slider 30. In this process, the inner pull-out slider 30 will slide upward along the guiding direction of the first pushing surface 21 and stagger with the movable mold cavity 11 to demold the inner pull-out slider portion of the injection molded part.

[0021] In detail, the present invention also discloses a method for assembling the inner core pulling mechanism of the injection mold as described above:

[0022] S1, first install the inner slide block 30 to the movable platen 10 (the movable mold core has been installed), then install the first support machine 20 into the movable platen 10, and press the inner slide block 30;

[0023] S2, insert the connecting rod 40 from the second linkage section 232 of the linkage hole 23, so that the pressing platform 43 of the connecting rod 40 presses against the guide pull surface 22; the size of the second linkage section 232 is larger than the first linkage section 231, and the size of the second rod section 42 is larger than the first rod section 41. One end of the first rod section 41 is inserted from the second linkage section 232 to the first linkage section 231 until the first rod section 41 is completely inserted into the linkage hole 23. The mounting groove 14 on the side of the driven template 10 (and the rear mold core) is connected and matched with the inner pull-out slider 30 by installing the pin 33; the first rod section 41 is flexibly connected with the inner pull-out slider 30 through the pin 33, so that the pressing platform 43 of the connecting rod 40 can be matched with the guide pull surface 22, and the first rod section 41 is matched with the inner pull-out slider 30 through the pin 33, tightening the inner pull-out slider 30, and making the connecting rod 40 located in the linkage hole 23 without being fixed by other connecting components, thereby improving assembly efficiency.

[0024] S3, installing the second support machine 50 on the movable template 10, so that the inner slide block 30 cooperates with the second support machine 50;

[0025] S4, install the spring plate 13 onto the moving plate 10, and fix the first support 20 to the spring plate by screws;

[0026] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An internal core pulling mechanism of an injection mold, comprising a fixed mold plate and a movable mold plate arranged opposite to each other, wherein a fixed mold cavity and a movable mold cavity are respectively formed in the fixed mold plate and the movable mold plate; the movable mold plate comprises a mold closing state and a mold opening state, when the movable mold plate is in the mold closing state, the movable mold plate moves toward the direction close to the fixed mold plate so that the movable mold cavity and the fixed mold cavity cooperate with each other to form a closed mold cavity for molding an injection molded part, and when the movable mold plate is in the mold opening state, the movable mold plate moves toward the direction away from the fixed mold plate so that the movable mold cavity and the fixed mold cavity are separated from each other; characterized in that: The movable mold cavity is provided with a core-pulling mechanism for facilitating the injection molded part to be separated from the movable mold cavity in the mold opening state, the core-pulling mechanism comprises a first support machine, an inner pull-out slider and a connecting rod, the first support machine is movably arranged on the movable mold plate and can reciprocate in the movable mold cavity; a first push surface is formed on the outside of the first support machine, a guide pull surface is formed on the inside of the first support machine, the first push surface and the guide pull surface are parallel to each other, so as to jointly guide the inner pull-out slider to realize mold closing and resetting or pulling and demolding, one end of the connecting rod forms a fixed end and extends into the first support machine and cooperates with the guide pull surface, the other end of the connecting rod forms a connecting end and is flexibly connected to the inner pull-out slider, and the inner pull-out slider can be slidably pressed against the first push surface.

2. The inner core pulling mechanism of the injection mold according to claim 1, characterized in that: The connecting rod is perpendicular to the first pushing surface and the pulling guide surface respectively.

3. The inner core pulling mechanism of the injection mold according to claim 1, characterized in that: The movable template is provided with a second support machine, and the second support machine is formed with a second push surface that cooperates with the first push surface to guide the inner pull-out slider, one side of the inner pull-out slider is pressed and fitted with the first push surface, and the other side of the inner pull-out slider is pressed and fitted with the second push surface; the first push surface and the second push surface are perpendicular to each other.

4. The inner core pulling mechanism of the injection mold according to claim 1, characterized in that: A core-pulling guide surface that cooperates with the first pushing surface is formed on the side of the inner pull-out slider opposite to the first pushing surface, and a driving hole is opened on the core-pulling guide surface. The connecting rod extends into the driving hole and is hingedly cooperated with the inner pull-out slider through a pin, and the rotation axis of the pin is perpendicular to the connecting rod.

5. The inner core pulling mechanism of the injection mold according to claim 4, characterized in that: A gap is formed between the driving hole and the connecting rod, so that the connecting rod and the inner sliding block can swing relative to each other around the rotation axis of the pin.

6. The inner core pulling mechanism of the injection mold according to claim 2, characterized in that: A linkage hole is provided in the first support machine and passes through both ends of the first support machine. One end of the linkage hole is connected to the first push surface, and the other end of the linkage hole passes through the guide pull surface and is connected to the outside of the first support machine. The connecting rod is connected to the linkage hole. In the first direction, the inner diameter of the linkage hole is larger than the outer diameter of the connecting rod, so that the connecting rod can be located in the linkage hole to drive the inner pull-out slider to slide.

7. The inner core pulling mechanism of the injection mold according to claim 6, characterized in that: The linkage hole includes a first linkage section and a second linkage section which are connected to each other; the first linkage section is arranged at an end close to the first pushing surface, and the second linkage section is arranged at an end away from the first pushing surface. In the second direction, the inner diameter of the second linkage section is larger than that of the first linkage section, so that the step formed between the second linkage section and the first linkage section forms the guide pulling surface.

8. The inner core pulling mechanism of the injection mold according to claim 7, characterized in that: The connecting rod comprises a first rod segment and a second rod segment, the outer diameter of the second rod segment is larger than the outer diameter of the first rod segment, and the step formed between the second rod segment and the first rod segment forms a pressing platform that presses against the guide pulling surface.

9. The inner core pulling mechanism of the injection mold according to claim 8, characterized in that: A pad is arranged on the pressing platform.

10. The inner core pulling mechanism of the injection mold according to claim 1, characterized in that: A core-pulling hole connected to the movable mold cavity is provided at the bottom of the movable mold plate, and the first support machine is movably arranged in the core-pulling hole and passes through the core-pulling hole at both ends; a spring plate for driving the first support machine is provided at the lower part of the movable mold plate, and the spring plate can reciprocate in the direction of approaching and moving away from the movable mold plate, and the first support machine passes through the bottom of the movable mold plate and is fixedly connected to the spring plate.

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