Secondary core pulling mechanism and injection mold thereof

Abstract

The utility model provides a secondary core-pulling mechanism and an injection mold thereof, and the secondary core-pulling mechanism is characterized in that a first inclined block, a first driving part, a first guide part, a second inclined block, a second driving part, a second guide part and other related parts are matched with one another; according to the invention, the demoulding problem that the reverse buckling and releasing directions in two different directions in the limited space of an injection product intersect and the releasing movement interferes with each other can be well solved, so that the injection product can be smoothly demoulded, the mould reliability is improved, and the production efficiency and the production quality are further improved; furthermore, the secondary core-pulling mechanism further comprises a limiting part capable of limiting the lifting displacement stroke of the mold opening top plate, a locking block capable of locking the first inclined block and wear-resistant blocks located on the peripheral sides of the first inclined block and / or the second inclined block, and the reliability of the mold can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a secondary core pulling mechanism and an injection mold thereof. Background Art

[0002] In modern industrial production, injection molding products are often produced by injection molding machines and injection molds. For products without undercuts (undercuts refer to structures that interfere with the mold opening direction), demoulding can be successfully completed by simply separating the upper mold and the lower mold after the injection molding is completed; but for some products with undercuts, demoulding cannot be achieved by simply separating the upper mold and the lower mold, but requires a specific core pulling mechanism to achieve demoulding at the undercut position, so as to successfully complete demoulding and obtain the product.

[0003] With the rapid development of modern industry, the structure of injection molded products is becoming more and more complex, and the number of undercuts in the products is increasing. Injection molded products often have multiple undercuts in different directions. In the prior art, in this case, multiple sets of core pulling mechanisms are generally set up to remove the undercuts separately in order to successfully demold the product; but when the internal space of the product is relatively narrow, the spacing between two adjacent undercuts in different directions is small, the position is relatively compact, and two sets of core pulling mechanisms cannot be accommodated, the method of setting multiple sets of core pulling mechanisms in the prior art cannot remove all the undercuts in the limited space.

[0004] like Figure 1 As shown, it is a schematic diagram of the structure of the injection molding product of the bottom shell of the air conditioner. The injection molding product 1 is adjacently provided with a first undercut 11 and a second undercut 12 in an "eight" shape and in two different directions. Specifically, the undercut 11 on the left has a release direction of the upper right, and the undercut 12 on the right has a release direction of the upper left, and the two release directions intersect. Since the spacing between the undercut 11 and the undercut 12 is small, if two sets of core pulling mechanisms are set to release separately in accordance with the prior art, the release movements of adjacent core pulling mechanisms will interfere with each other, resulting in failure to successfully complete the demoulding and failure to achieve stable and efficient production of the product. Utility Model Content

[0005] The utility model provides a secondary core pulling mechanism and its injection mold, which can solve the demoulding problem of two different directions of undercutting and releasing in a confined space, intersecting and interfering with each other in the release motion, so that the injection molded product can be demoulded smoothly, improving the production efficiency and production quality. The specific technical solution is as follows:

[0006] A secondary core pulling mechanism, used for releasing the first undercut and the second undercut which are adjacently arranged on the injection molded product and are in an "eight" shape, characterized by comprising a first inclined block, a first driving component, a first guiding component, a second inclined block, a second driving component, and a second guiding component;

[0007] The first inclined block is slidably connected to the mold opening top plate of the mold through the first driving component. As the mold opening top plate rises upward, the first inclined block moves obliquely along the guiding direction of the first guiding component under the lifting of the first driving component. The guiding direction of the first guiding component is consistent with the undercut direction of the second undercut.

[0008] The second inclined block is adjacent to the first inclined block, and the surfaces where the first inclined block and the second inclined block contact each other correspond to the first inclined surface and the second inclined surface respectively; the second inclined block is slidably connected to the first inclined surface through the second driving component, and as the first inclined block moves obliquely, under the lifting of the second driving component, the second inclined block moves obliquely along the guiding direction of the second guide component, and the guiding direction of the second guide component is consistent with the undercut direction of the first undercut.

[0009] Furthermore, the first driving component includes a first guide rail fixed to the bottom of the mold opening top plate and in the same direction as the undercut direction of the first undercut, and the first guide rail is T-shaped or dovetail-shaped; at the same time, a first slide groove adapted to the first guide rail is provided at the top of the first inclined block.

[0010] Furthermore, the number of the first guide rails is at least two.

[0011] Furthermore, the first guide component includes a first fixed guide body fixed on the fixed template of the mold and having an inclination angle the same as the undercut angle of the second undercut; at the same time, a first sliding body adapted to the first fixed guide body and slidable on the first fixed guide body is provided on the first inclined block.

[0012] Furthermore, the number of the first fixed guide bodies is at least two.

[0013] Furthermore, the second driving component includes a second guide rail fixed on the first inclined plane and in the same direction as the undercut direction of the second undercut, and the second guide rail is T-shaped or dovetail-shaped; at the same time, a second slide groove adapted to the second guide rail is provided on the second inclined plane.

[0014] Furthermore, the number of the second guide rails is at least two.

[0015] Furthermore, the second guide component includes a second fixed guide body fixed on the fixed template and having an inclination angle the same as the undercut angle of the first undercut; at the same time, a second sliding body adapted to the second fixed guide body and slidable on the second fixed guide body is provided on the second inclined block.

[0016] Furthermore, the number of the second fixed guide bodies is at least two.

[0017] Furthermore, it also includes a limiting component, which is arranged at the bottom of the mold opening top plate and can limit the lifting and lowering displacement stroke of the mold opening top plate.

[0018] Furthermore, it also includes a locking block, which is fixed to the bottom of the mold opening top plate and can abut against the top of the first inclined block when the mold is closed.

[0019] Furthermore, there are three locking blocks, which are evenly distributed and abut against the top of the first inclined block.

[0020] Furthermore, wear-resistant blocks are arranged around the first inclined block and / or the second inclined block.

[0021] An injection mold comprises the secondary core pulling mechanism described in any one of the above items.

[0022] The secondary core pulling mechanism provided by the utility model can better solve the demoulding problem of the intersection of two different directions of undercut and release directions and mutual interference of release movements in the confined space of the injection molded product through the mutual cooperation of the first inclined block, the first driving component, the first guiding component, the second inclined block, the second driving component, the second guiding component and other related components, and reasonably utilizes their mechanical structure relationship, so as to enable the injection molded product to be demoulded smoothly, improve the reliability of the mold, and further improve the production efficiency and production quality.

[0023] Furthermore, the secondary core pulling mechanism also includes a limiting component that can limit the lifting and lowering displacement stroke of the mold opening top plate, a locking block that can lock the first bevel block, and wear-resistant blocks located on the sides of the first bevel block and / or the second bevel block, which can further improve the reliability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the injection molding product structure.

[0025] Figure 2 This is a cross-sectional view of the secondary core pulling mechanism provided by the utility model in the mold closing state.

[0026] Figure 3 This is a cross-sectional view of the secondary core pulling mechanism provided by the utility model in the mold opening state.

[0027] Figure 4 This is a front view of the secondary core pulling mechanism provided by the utility model in the mold closing state.

[0028] Figure 5 This is a front view of the secondary core pulling mechanism provided by the utility model in the mold opening state.

[0029] Figure 6 It is a right view of the secondary core pulling mechanism provided by the utility model in the mold closing state.

[0030] Figure 7 This is a right view of the secondary core pulling mechanism provided by the utility model in the mold opening state.

[0031] Figure 8 It is a left view of the secondary core pulling mechanism provided by the utility model in the mold closing state.

[0032] Fig. 9 This is a left view of the secondary core pulling mechanism provided by the utility model in the mold opening state.

[0033] Fig.10 This is a three-dimensional diagram of the secondary core pulling mechanism provided by the utility model in the mold closing state.

[0034] Fig.11 This is a three-dimensional diagram of the secondary core pulling mechanism provided by the utility model in the mold opening state.

[0035] Fig.12 This is a schematic diagram of the second inclined block structure of the secondary core pulling mechanism provided by the utility model.

[0036] Fig.13 This is a schematic structural diagram of the first inclined block of the secondary core pulling mechanism provided by the utility model.

[0037] The figure numbers are as follows: 101 is the mold opening top plate, 102 is the fixed mold plate, 1 is the injection molded product, 11 is the first undercut, 12 is the second undercut, 2 is the first inclined block, 21 is the first inclined surface, 3 is the first driving component, 31 is the first guide rail, 32 is the first slide groove, 4 is the first guide component, 41 is the first fixed guide body, 42 is the first sliding body, 5 is the second inclined block, 51 is the second inclined surface, 6 is the second driving component, 61 is the second guide rail, 62 is the second slide groove, 7 is the second guide component, 71 is the second fixed guide body, 72 is the second sliding body, 8 is the limiting component, 9 is the locking block, A is the first undercut release direction, B is the second undercut release direction, and C is the mold opening direction. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. For the convenience of description, the directions or positional relationships indicated by the terms "front", "rear", "front", "reverse", "left", "right", "top", "bottom", "up", "down", "inside", "outside", "inside", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention and the actual direction of the product or device during production, use, sales, etc. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Furthermore, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "composed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0040] like Figure 1 As shown in FIG. 1 , it is a schematic diagram of the structure of the injection molding product of the bottom shell of the air conditioner. The injection molding product 1 is adjacently provided with two first undercuts 11 and second undercuts 12 in an "eight" shape in different directions. Specifically, the release direction of the first undercut 11 located on the left side is the upper right side, that is, Figure 1 The tripping direction of the second undercut 12 on the right side is the upper left, that is, Figure 1 The B direction of the mold is upward. Figure 1 The adjacent setting is based on Figure 1 As shown, the disengagement directions of the first undercut 11 and the second undercut 12 intersect, and since the spacing between the first undercut 11 and the second undercut 12 is small, if two sets of core pulling mechanisms are set to disengage separately in accordance with the prior art, the disengagement movements of adjacent core pulling mechanisms will interfere with each other, resulting in failure to successfully complete demoulding and failure to achieve stable and efficient production of products.

[0041] It should be noted that, in the present invention, the undercut direction refers to the direction in which the end of the undercut points, for example, the undercut direction of the first undercut 11 is direction A, and the undercut direction of the second undercut 12 is direction B; the undercut angle refers to the acute angle formed by the undercut and the horizontal plane, for example, the undercut angle of the first undercut 11 is α, and the undercut angle of the second undercut 12 is β.

[0042] The utility model provides a secondary core pulling mechanism, which can solve the demoulding problem that two undercut and release directions in different directions intersect and the release movements interfere with each other in a confined space, so that the injection molded product can be demoulded smoothly, and the production efficiency and production quality are improved.

[0043] like Figures 2 to 13 As shown, the mold includes a mold opening top plate 101 and a fixed mold plate 102. In the present utility model, the mold opening top plate 101 refers to a plate located at the top of the mold and opened and raised upward when the mold is opened. In this embodiment, it is a hot runner plate, and in actual applications, it can also be other plates; the secondary core pulling mechanism includes a first inclined block 2, a first driving component 3, a first guide component 4, a second inclined block 5, a second driving component 6, and a second guide component 7. Specifically:

[0044] The first driving component 3 is fixed to the bottom of the mold opening top plate 101, and the first inclined block 2 is slidably connected to the mold opening top plate 101 through the first driving component 3. As the mold opening top plate 101 rises upward, under the pulling action of the first driving component 3, the first inclined block 2 moves obliquely along the guiding direction of the first guide component 4, and the guiding direction of the first guide component 4 is consistent with the undercut direction of the second undercut 12, that is, Figure 1 B direction in the middle;

[0045] The second inclined block 5 is adjacent to the first inclined block 2, and the surfaces where the first inclined block 2 and the second inclined block 5 contact each other correspond to the first inclined surface 21 and the second inclined surface 51 respectively; the second driving component 6 is fixed to the first inclined surface 21; the second driving component 6 is fixed to the first inclined surface 21, and the second inclined block 5 is slidably connected to the first inclined block 2 through the second driving component 6. With the oblique movement of the first inclined block 2, under the lifting action of the second driving component 6, the second inclined block 5 moves obliquely along the guiding direction of the second guide component 7, and the guiding direction of the second guide component 7 is consistent with the undercut direction of the first undercut 11, that is, Figure 1 The A direction in .

[0046] When in use, the mold opening top plate 101 is opened and lifted upward; by pulling the first driving component 3 fixed to the bottom of the mold opening top plate 101, the first inclined block 2 moves obliquely along the guiding direction of the first guide component 4 to complete the disengagement of the second undercut 12; at the same time, by pulling the second driving component 6 fixed on the first inclined block 2, the second inclined block 5 moves obliquely along the guiding direction of the second guide component 7 to complete the disengagement of the first undercut 11.

[0047] The secondary core-pulling mechanism with the above structure can better solve the demoulding problem of the intersection of the two different directions of the undercut and release directions in the confined space of the injection molded product 1 and the mutual interference of the release movements through the mutual cooperation of the first inclined block 2, the first driving component 3, the first guide component 4, the second inclined block 5, the second driving component 6, the second guide component 7 and other related components, and the rational use of their mechanical structure relationship, so that the injection molded product 1 can be demoulded smoothly, the mold reliability can be improved, and the production efficiency and production quality can be improved.

[0048] In some embodiments, the first driving component 3 is a first guide rail 31 fixed to the bottom of the mold opening top plate 101, and the first guide rail 31 is in the same direction as the undercut direction of the first undercut 11 (the same direction mentioned here can be a completely consistent direction, a parallel direction, or any direction in the same quadrant. For example, in this embodiment, the undercut direction of the first undercut 11 is the upper right, and the direction of the first guide rail 31 is also the upper right), and the first guide rail 31 is T-shaped or dovetail-shaped or other similar shapes; at the same time, a first slide groove 32 adapted to the first guide rail 31 is provided at the top of the first inclined block 2, and the first guide rail 31 can slide on the first slide groove 32.

[0049] The secondary core-pulling mechanism with the above structure can realize the sliding connection between the mold opening top plate 101 and the first inclined block 2 through the mutual cooperation of the first guide rail 31 and the first slide groove 32. Combined with the guiding direction of the first guide component 4, when the mold opening top plate 101 is opened and raised upward, the first inclined block 2 moves obliquely to the upper left to complete the disengagement of the second undercut 12.

[0050] In some embodiments, the number of the first guide rails 31 is two. Of course, when there is enough space inside the mold, the number of the first guide rails 31 can also be set to multiple according to actual production needs; more preferably, the two or more first guide rails 31 are equidistantly distributed on the top of the first inclined block 2.

[0051] By adopting the secondary core pulling mechanism of the above structure, the number of the first guide rails 31 is set to two or more, and the two or more first guide rails 31 are set to be equidistantly distributed, so that the force can be more balanced, thereby improving the reliability of the mold and improving the production efficiency and production quality.

[0052] In some embodiments, the first guide member 4 includes a first fixed guide body 41 fixed on the fixed plate 102 of the mold, and the inclination angle of the first fixed guide body 41 is the same as the undercut angle of the second undercut 12, that is, Figure 1 β in ; Meanwhile, a first sliding body 42 adapted to the first fixed guide body 41 is provided on the first inclined block 2, and the first fixed guide body 41 can slide on the first sliding body 42. In this embodiment, the first fixed guide body 41 is a slider fixed on the fixed plate 102 of the mold, and the first sliding body 42 is a slide groove provided on the first inclined block 2 and adapted to the slider; of course, the first fixed guide body 41 can also be a slide groove provided on the fixed plate 102 of the mold, and the first sliding body 42 is a slider provided on the first inclined block 2 and adapted to the slide groove, as long as the first fixed guide body 41 can slide on the first sliding body 42.

[0053] The secondary core-pulling mechanism with the above structure can realize the sliding connection between the fixed template 102 and the first inclined block 2 through the mutual cooperation of the first fixed guide body 41 and the first sliding body 42. At the same time, the movement direction of the first inclined block 2 can be limited, so that when the mold opening top plate 101 is opened and raised upward, the first inclined block 2 moves obliquely to the upper left to complete the disengagement of the second undercut 12.

[0054] In some embodiments, the number of the first fixed guide bodies 41 is two. Of course, if the internal space of the mold is sufficient, the number of the first fixed guide bodies 41 can also be set to multiple according to actual production needs. The first fixed guide body 41 can be T-shaped, dovetail-shaped or other similar shapes.

[0055] By adopting the secondary core-pulling mechanism of the above structure, setting the number of the first fixed guide bodies 41 to two or even more can make the force more balanced, so that the direction of the first guide component 4 is more accurate, thereby improving the mold reliability, production efficiency and production quality.

[0056] In some embodiments, the second driving component 6 includes a second guide rail 61 fixed on the first inclined surface 21 of the first inclined block 2, and the second guide rail 61 is in the same direction as the undercut direction of the second undercut 12 (the same direction mentioned here can be a completely consistent direction, a parallel direction, or any direction in the same quadrant. For example, in this embodiment, the undercut direction of the second undercut 12 is the upper left, and the direction of the second guide rail 61 is also the upper left), and the second guide rail 61 is T-shaped or dovetail-shaped or other similar shapes; at the same time, a second slide groove 62 adapted to the second guide rail 61 is provided on the second inclined surface 51 of the second inclined block 5, and the second guide rail 61 can slide on the second slide groove 62.

[0057] The secondary core-pulling mechanism with the above structure can realize the sliding connection between the first inclined block 2 and the second inclined block 5 through the mutual cooperation of the second guide rail 61 and the second slide groove 62. Combined with the guiding direction of the second guide component 7, when the first inclined block 2 moves obliquely to the upper left, the second inclined block 5 moves obliquely to the upper right, thereby completing the disengagement of the first undercut 11.

[0058] In some embodiments, the number of the second guide rails 61 is two. Of course, if there is enough space inside the mold, the number of the second guide rails 61 can also be set to multiple according to actual production needs; more preferably, the two or more second guide rails 61 are equidistantly distributed on the first inclined surface 21.

[0059] By adopting the secondary core pulling mechanism of the above structure, the number of the second guide rails 61 is set to two or more, and the two or more second guide rails 61 are set to be equidistantly distributed, so that the force can be more balanced, thereby improving the reliability of the mold and improving the production efficiency and production quality.

[0060] In some embodiments, the second guide member 7 includes a second fixed guide body 71 fixed on the fixed template 102, and the inclination angle of the second fixed guide body 71 is the same as the undercut angle of the first undercut 11, that is, Figure 1α in the figure; at the same time, a second sliding body 72 adapted to the second fixed guide body 71 is provided on the second inclined block 5, and the second fixed guide body 71 can slide on the second sliding body 72. In this embodiment, the second fixed guide body 71 is a slider fixed on the fixed plate 102 of the mold, and the second sliding body 72 is a slide groove provided on the second inclined block 5 and adapted to the slider; of course, the second fixed guide body 71 can also be a slide groove provided on the fixed plate 102 of the mold, and the second sliding body 72 is a slider provided on the second inclined block 5 and adapted to the slide groove, as long as the second fixed guide body 71 can slide on the second sliding body 72.

[0061] By adopting the secondary core-pulling mechanism of the above structure, the sliding connection between the fixed template 102 and the second inclined block 5 can be realized through the mutual cooperation of the second fixed guide body 71 and the second sliding body 72. At the same time, the movement direction of the second inclined block 5 can be limited, so that when the first inclined block 2 moves obliquely to the upper left, the second inclined block 5 moves obliquely to the upper right left, completing the disengagement of the first undercut 11.

[0062] In some embodiments, the number of the second fixed guide bodies 71 is two. Of course, if the internal space of the mold is sufficient, the number of the second fixed guide bodies 71 can also be set to multiple according to actual production needs. The second fixed guide body 71 can be T-shaped, dovetail-shaped or other similar shapes.

[0063] By adopting the secondary core-pulling mechanism of the above structure and setting the number of the second fixed guide bodies 71 to two or more, the force can be more balanced, so that the direction of the second fixed guide body 71 can be guided more accurately, thereby improving the reliability of the mold and improving the production efficiency and production quality.

[0064] In some embodiments, the secondary core pulling mechanism also includes a limiting component 8, which is arranged at the bottom of the mold opening top plate 101 and connects the mold opening top plate 101 with the fixed mold plate 102, and can limit the lifting and lowering displacement stroke of the mold opening top plate 101; in this embodiment, the limiting component 8 includes a limiting screw and a stopper. Of course, the limiting component 8 can also adopt other common limiting structures as long as it can realize the limiting function, and there is no limitation here; in addition, the limiting component 8 can be one or more. More preferably, the limiting component 8 can be symmetrically arranged on the mold opening top plate 101 or evenly distributed in other ways.

[0065] The secondary core-pulling mechanism of the above structure can limit the lifting and lowering stroke of the mold opening top plate 101 by setting a limiting component 8 between the mold opening top plate 101 and the fixed mold plate 102, thereby preventing the mold opening top plate 101 from moving excessively when it is opened and raised, thereby improving production efficiency and production quality.

[0066] In some embodiments, the secondary core pulling mechanism also includes a locking block 9, which is fixed to the bottom of the mold opening top plate 101 and can press against the top of the first bevel block 2 when the mold is closed, that is, the bottom of the locking block 9 and the top of the first bevel block 2 are in contact with each other when the mold is closed.

[0067] The secondary core-pulling mechanism with the above structure can compress the first bevel block 2 when the mold is closed through the setting of the locking block 9, thereby locking the first bevel block 2, thereby improving the mold reliability and enhancing the production efficiency and production quality.

[0068] In some embodiments, the number of the locking blocks 9 is three, and the three locking blocks 9 are evenly distributed and abut against the top of the first inclined block 2 ; more preferably, the three locking blocks 9 are spaced apart from the two first guide rails 31 .

[0069] By adopting the secondary core-pulling mechanism of the above structure and setting the number of the locking blocks 9 to three, the force can be more balanced, so that the locking effect of the locking blocks 9 is better, thereby improving the mold reliability, production efficiency and production quality.

[0070] In some embodiments, wear-resistant blocks are arranged around the first inclined block 2 or the second inclined block 5 as wear-resistant surfaces of the moving friction surfaces of the first inclined block 2 or the second inclined block 5. Of course, wear-resistant blocks can also be arranged around both the first inclined block 2 and the second inclined block 5.

[0071] The secondary core-pulling mechanism with the above structure can improve the stability and durability of the sliding surface by arranging wear-resistant blocks around the first inclined block 2 and / or the second inclined block 5 as the wear-resistant surface of the moving friction surface, thereby improving production efficiency and production quality.

[0072] This embodiment also provides an injection mold, including a secondary core pulling mechanism of any of the above-mentioned technical solutions, which can better solve the demoulding problem in which the two different directions of undercut and release directions in the confined space of the injection molded product 1 intersect and the release movements interfere with each other, so that the injection molded product 1 can be demoulded smoothly, the mold reliability is improved, and the production efficiency and production quality are further improved.

[0073] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A secondary core pulling mechanism, used for releasing a first undercut (11) and a second undercut (12) arranged adjacent to each other in an "eight" shape on an injection molded product (1), characterized in that: It comprises a first inclined block (2), a first driving component (3), a first guiding component (4), a second inclined block (5), a second driving component (6), and a second guiding component (7); The first inclined block (2) is slidably connected to the mold opening top plate (101) of the mold through the first driving component (3); as the mold opening top plate (101) rises upward, the first inclined block (2) moves obliquely along the guiding direction of the first guiding component (4) under the lifting of the first driving component (3); the guiding direction of the first guiding component (4) is consistent with the undercut direction of the second undercut (12); The second inclined block (5) is adjacent to the first inclined block (2), and the surfaces where the first inclined block (2) and the second inclined block (5) contact each other correspond to the first inclined surface (21) and the second inclined surface (51), respectively; the second inclined block (5) is slidably connected to the first inclined surface (21) via the second driving component (6); as the first inclined block (2) moves obliquely, the second inclined block (5) moves obliquely along the guiding direction of the second guiding component (7) under the lifting of the second driving component (6); the guiding direction of the second guiding component (7) is consistent with the undercut direction of the first undercut (11).

2. The secondary core pulling mechanism according to claim 1, characterized in that: The first driving component (3) comprises a first guide rail (31) fixed to the bottom of the mold opening top plate (101) and in the same direction as the undercut direction of the first undercut (11), and the first guide rail (31) is T-shaped or dovetail-shaped; at the same time, a first slide groove (32) adapted to the first guide rail (31) is provided at the top of the first inclined block (2).

3. The secondary core pulling mechanism according to claim 2, characterized in that: The number of the first guide rails (31) is at least two.

4. The secondary core pulling mechanism according to claim 1, characterized in that: The first guide component (4) comprises a first fixed guide body (41) fixed on a fixed mold plate (102) of the mold and having an inclination angle the same as the undercut angle of the second undercut (12); at the same time, a first sliding body (42) adapted to the first fixed guide body (41) and capable of sliding on the first fixed guide body (41) is arranged on the first inclined block (2).

5. The secondary core pulling mechanism according to claim 4, characterized in that: The number of the first fixed guide bodies (41) is at least two.

6. The secondary core pulling mechanism according to claim 1, characterized in that: The second driving component (6) comprises a second guide rail (61) fixed on the first inclined surface (21) and in the same direction as the undercut direction of the second undercut (12), and the second guide rail (61) is T-shaped or dovetail-shaped; at the same time, a second slide groove (62) adapted to the second guide rail (61) is provided on the second inclined surface (51).

7. The secondary core pulling mechanism according to claim 6, characterized in that: The number of the second guide rails (61) is at least two.

8. The secondary core pulling mechanism according to claim 1, characterized in that: The second guide component (7) comprises a second fixed guide body (71) fixed on the fixed template (102) and having an inclination angle the same as the undercut angle of the first undercut (11); at the same time, a second sliding body (72) adapted to the second fixed guide body (71) and capable of sliding on the second fixed guide body (71) is arranged on the second inclined block (5).

9. The secondary core pulling mechanism according to claim 8, characterized in that: The number of the second fixed guide bodies (71) is at least two.

10. The secondary core pulling mechanism according to any one of claims 1 to 9, characterized in that: It also comprises a limiting component (8), wherein the limiting component (8) is arranged at the bottom of the mold opening top plate (101) and can limit the lifting and lowering displacement stroke of the mold opening top plate (101).

11. The secondary core pulling mechanism according to any one of claims 1 to 9, characterized in that: It also includes a locking block (9), which is fixed to the bottom of the mold opening top plate (101) and can abut against the top of the first inclined block (2) when the mold is closed.

12. The secondary core pulling mechanism according to claim 11, characterized in that: The number of the locking blocks (9) is three, which are evenly distributed and abut against the top of the first inclined block (2).

13. The secondary core pulling mechanism according to any one of claims 1 to 9, characterized in that: Wear-resistant blocks are arranged around the first inclined block (2) and / or the second inclined block (5).

14. An injection mold, characterized in that: It includes the secondary core pulling mechanism described in any one of claims 1 to 13.

Images