Core pulling mechanism and injection mold

Abstract

The utility model discloses a core-pulling mechanism and an injection mold, and relates to the technical field of injection molds, the core-pulling mechanism comprises a first insert and a second insert, according to the technical scheme, the first insert and the second insert are arranged on a first mold body, in the mold opening process, along with separation of the first mold body and the second mold body, the first insert and the second insert are inserted into the first mold body; the first insert and the second insert can be separated from the mold, and the core-pulling mechanism disclosed by the utility model can finish the core-pulling and demolding actions of an inverted buckle by utilizing the mold opening action of the mold without being driven by an oil cylinder or other mechanical mechanisms; secondly, the first insert and the second insert move in the first direction relative to the second mold, the first direction is the direction perpendicular to the parting surfaces of the first mold body and the second mold body, and the movement relation of the core pulling mechanism is simple, so that the core pulling mechanism is simple in structure and small in mold space occupation; and especially, the advantages are more obvious in the scene of simultaneously generating a plurality of inverted products in a relatively small space.

Description

Technical Field

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

[0002] At present, the mouth of the air conditioner louver product is provided with an undercut, and the existing production method is to use a slanted top and a slider structure to realize the detachment of the product undercut shape. However, the slanted top and the slider structure have the problem of occupying a large space. Utility Model Content

[0003] The main purpose of the utility model is to provide a core pulling mechanism and an injection mold, aiming to solve the problem that the injection mold for producing a mold with an undercut occupies a large space.

[0004] To achieve the above-mentioned purpose, the core pulling mechanism proposed in the utility model is applied to an injection mold, wherein the injection mold comprises a first mold body and a second mold body, and the core pulling mechanism is used to mold with the first mold body and the second mold body to inject a mold with an undercut, and the core pulling mechanism comprises:

[0005] A first insert, disposed on the first mold body;

[0006] A second insert is provided in the first mold body, the second insert is located between the first mold body and the second mold body, the second insert has a first cavity and a first opening, and the first cavity is configured in an inverted shape; and

[0007] A limiting component, used for limiting the position of the second insert;

[0008] When the first mold body and the second mold body are in a mold-closing state, the first insert extends from the opening into the first cavity, and the first insert, the second insert, the first mold body and the second mold body enclose an injection cavity for an injection mold;

[0009] When the first mold body and the second mold body are in the process of opening the mold, the first insert and the second insert can move along the first direction relative to the second mold body, wherein when the first insert moves from its initial position to the first position, the second insert is limited to the initial position; when the first insert moves from the first position to the second position relative to the second mold body, the second insert moves from its initial position to the third position.

[0010] In one embodiment, the core pulling mechanism includes a limiting assembly, and when the first insert moves from its initial position to the first position, the limiting assembly is used to limit the second insert to the initial position.

[0011] In one embodiment, the limiting assembly is installed in the first mold body, the second insert is arranged between the second mold body and the limiting assembly, and the second insert is slidably connected to the limiting assembly.

[0012] In one embodiment, the position limiting assembly includes a reset member, and the reset member is arranged between the first mold body and the second insert;

[0013] During the process of closing the first mold body and the second mold body, the reset member deforms and stores energy;

[0014] During the process of opening the first mold body and the second mold body, before the first insert moves to the first position, the reset member releases stored energy to limit the second insert to the second mold body.

[0015] In one embodiment, the limiting assembly includes a connecting member, the connecting member includes a limiting portion and a second connecting portion, and the reset member is arranged around the second connecting portion; the second insert is provided with a first mounting hole and a second mounting hole that are interconnected, the limiting portion is arranged in the first mounting hole, the second connecting portion is passed through the second mounting hole, and the end of the second connecting portion away from the limiting portion is connected to the first mold body; when the first mold body moves to the first position, the limiting portion abuts against the second insert.

[0016] In one embodiment, the connecting member is a screw of equal height, and / or the resetting member is a spring.

[0017] In one embodiment, the first insert includes a first connecting portion and an embedding portion that are connected to each other, the first connecting portion is used to connect to the first mold body; when the first mold body and the second mold body are in a mold closing state, the embedding portion extends into the first cavity.

[0018] In one embodiment, at least one side surface of the second insert is inclined toward the first mold body.

[0019] In one embodiment, one side of the second insert is further provided with a second opening and a third opening communicating with the first cavity, and the first opening, the second opening and the third opening are located on different sides of the second insert; the second mold body has a second cavity;

[0020] When the first mold body and the second mold body are in a mold closing state, the second opening is covered by the first mold body, and the second cavity is connected with the first cavity through the third opening.

[0021] The utility model also provides an injection mold, the injection mold comprising:

[0022] The first model;

[0023] A second mold body, the second mold body is used to mold with the first mold body to injection mold the molded part; and

[0024] A core pulling mechanism as described in any of the aforementioned embodiments.

[0025] In one embodiment, the injection mold has a plurality of the core pulling mechanisms, and the plurality of the core pulling mechanisms are arranged along a length extension direction of the first mold body.

[0026] The technical solution of the utility model is to arrange the first insert and the second insert in the first mold body. During the mold opening process, as the first mold body and the second mold body are separated, the first insert and the second insert are separated from the mold. In this way, the core pulling mechanism of the utility model can utilize the mold opening action of the mold itself, without the need for a cylinder or other mechanical mechanism to drive, and without the need for other auxiliary actions, to complete the undercut core pulling and demolding action, thereby reducing the overall molding cycle of the mold; secondly, the first insert and the second insert both move relative to the second mold body along the first direction, and the first direction is a direction perpendicular to the parting surface of the first mold body and the second mold body, or a direction with a very small angle with the direction perpendicular to the parting surface. In this way, the movement relationship of the core pulling mechanism is simple, so that the structure of the core pulling mechanism is simple and the mold space occupancy is small, especially in the scenario where multiple undercut products are generated simultaneously in a smaller space. The advantage is more obvious. In addition, the technical solution of the utility model also has the advantages of simple and convenient maintenance, low cost and low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A structural schematic diagram of an embodiment of the injection mold provided by the utility model in a mold closing state;

[0029] Figure 2 for Figure 1 A cross-sectional view from a certain perspective;

[0030] Figure 3 for Figure 1 Schematic diagram of the structure after hiding the first motif;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure when the first insert is in the first position;

[0032] Figure 5 for Figure 4 Schematic diagram of the structure after hiding the first motif;

[0033] Figure 6 for Figure 1 A schematic diagram of the structure when the first insert is in the second position;

[0034] Figure 7 for Figure 6 Schematic diagram of the structure after hiding the first motif;

[0035] Figure 8 A schematic structural diagram of an embodiment of a core pulling mechanism and a mold body provided by the utility model;

[0036] Fig. 9 for Figure 8 A cross-sectional view from a certain perspective;

[0037] Fig.10 is a schematic structural diagram of an embodiment of a second insert;

[0038] Fig.11 for Fig.10 A cross-sectional view from a certain perspective.

[0039] Description of Figure Numbers:

[0040] 1. Injection mold;

[0041] 10. Core pulling mechanism;

[0042] 100, first insert; 110, first connecting portion; 120, inlay portion;

[0043] 200, second insert; 201, first mounting hole; 202, second mounting hole; 203, first cavity; 204, first opening; 205, second opening; 206, third opening;

[0044] 300, limit assembly; 310, reset member; 320, connection member; 321, limit portion; 322, second connection portion;

[0045] 40. Module; 41. Undercut;

[0046] 30. The second model;

[0047] 20. The first model.

[0048] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0052] The utility model proposes a core pulling mechanism, which is applied to an injection mold to be used for injection molding a mold with an undercut, which can be an air conditioning louver or other molds with an undercut, and aims to solve the problem that the injection mold for producing a mold with an undercut occupies a large space. Figures 1 to 11 , solid arrows indicate spaces, slots, or holes.

[0053] See also Figures 1 to 11 In one embodiment of the utility model, the injection mold 1 includes a first mold body 20 and a second mold body 30, and the core pulling mechanism 10 is used to mold with the first mold body 20 and the second mold body 30 to inject a mold 40 with an undercut 41, and the core pulling mechanism 10 includes:

[0054] A first insert 100, provided in the first mold body 20;

[0055] A second insert 200 is disposed in the first mold body 20 , the second insert 200 is located between the first mold body 20 and the second mold body 30 , the second insert 200 has a first cavity 203 and a first opening 204 , the first cavity 203 forms the shape of the undercut 41 ; and

[0056] When the first mold body 20 and the second mold body 30 are in a mold-closing state, the first insert 100 extends from the opening into the first cavity 203, and the first insert 100, the second insert 200, the first mold body 20 and the second mold body 30 enclose and form an injection molding cavity for the mold 40;

[0057] When the first mold body 20 and the second mold body 30 are in the process of opening the mold, the first insert 100 and the second insert 200 can move along the first direction relative to the second mold body 30, wherein when the first insert 100 moves from its initial position to the first position, the second insert 200 is limited to the initial position; when the first insert 100 moves from the first position to the second position relative to the second mold body 30, the second insert 200 moves from its initial position to the third position.

[0058] The technical solution of the utility model is that the core-pulling mechanism 10 composed of the first insert 100 and the second insert 200 is arranged on the first mold body 20. In the process of mold opening, as the first mold body 20 and the second mold body 30 are separated, the first insert 100 and the second insert 200 are separated from the mold. In this way, the core-pulling mechanism of the utility model can utilize the mold opening action of the mold itself, without the need for a cylinder or other mechanical mechanism drive, and without other auxiliary actions, to complete the undercut core-pulling demoulding action, thereby reducing the overall molding cycle of the mold; secondly, the first insert 100 and the second insert 2 00 moves along the first direction relative to the second mold body 30, and the first direction is a direction perpendicular to the parting surface of the first mold body 20 and the second mold body 30, or a direction with a very small angle with the direction perpendicular to the parting surface. In this way, the movement relationship of the core pulling mechanism 10 is simple, so that the structure of the core pulling mechanism 10 is simple and the mold space occupancy is small. Especially in the scenario of simultaneously generating multiple undercut products in a smaller space, the advantage is more obvious. In addition, the technical solution of the utility model also has the advantages of simple and convenient maintenance, low cost and low use cost.

[0059] The core pulling mechanism 10 is used to form a mold 40 with an undercut 41 for injection molding after being molded together with the first mold body 20 and the second mold body 30. It can be understood that the mold 40 with an undercut 41 includes a mold body and an undercut 41 arranged on the mold body.

[0060] Regarding the injection molding cavity, it can be understood that the injection molding cavity includes a first injection molding cavity and a second injection molding cavity, wherein the second injection molding cavity is used for molding the mold body, the second injection molding cavity is formed in the second mold body 30, and the first injection molding cavity is used for molding the undercut 41. In order to enable the undercut 41 to be demolded, the first injection molding cavity is usually surrounded by multiple components. Exemplarily, in this embodiment, when the first mold body 20 and the second mold body 30 are in a mold closing state, the first insert 100, the second insert 200, and the first mold body 20 are surrounded to form a first injection molding cavity that can be used for molding the mold 40 with the undercut 41.

[0061] After the first mold body 20 and the second mold body 30 are molded together, the matrix is ​​then injected into the injection cavity, that is, the molten matrix is ​​filled into the first injection cavity and the second injection cavity. When the matrix is ​​filled and solidified to a certain extent (usually cooled and set), the mold opening action is performed (that is, the first mold body 20 moves away from the second mold body 30 along the first direction, or the second mold body 30 moves away from the first mold body 20 along the first direction), and the mold 40 is retained on the second mold body 30.

[0062] In order to explain the present solution clearly, the following is described by taking the second mold body 30 moving away from the first mold body 20 along the first direction as an example, that is, the first mold body 20 is a static mold body and the second mold body 30 is a dynamic mold body.

[0063] The first insert 100 is an irregular mold accessory used to be embedded in the mold, and plays the role of fixing the template and filling the space between the templates. In this embodiment, the first insert 100 is mainly used to form a hollow structure with one end open of the undercut 41. The first insert 100 is installed on the first mold body 20. There are many ways to install the first insert 100 and the first mold body 20, which can be a detachable connection such as plug-in, snap-on or threaded connection, or a non-detachable connection such as welding connection. In order to improve the versatility of the first mold body 20, the first insert 100 and the first mold body 20 are usually connected in a detachable manner. Further, the first insert 100 includes an embedding portion 120 and a first connecting portion 110. The first connecting portion 110 is used to connect the first mold body 20. When the first mold body 20 and the second mold body 30 are in a mold-closing state, the embedding portion 120 extends from the opening into the first cavity 203 to form a hollow structure with one end open of the undercut 41.

[0064] For example, see Figure 8 and Fig. 9The first insert 100 includes a first connecting portion 110 and an embedding portion 120 connected to each other, wherein the first connecting portion 110 is used to connect to the first mold body 20; when the first mold body 20 and the second mold body 30 are in a mold-closing state, the embedding portion 120 extends into the first cavity 203. The end surface of the embedding portion 120 away from the first connecting portion 110 is set as a convex arc surface.

[0065] The second insert 200 is usually also disposed in the first mold body 20. The second insert 200 is located between the first mold body 20 and the second mold body 30. The second insert 200 has a first cavity 203 and a first opening 204. The first cavity 203 forms the shape of the undercut 41. That is, the outer contour of the undercut 41 of the mold 40 is formed in the second insert 200. In one implementation, a second opening 205 and a third opening 206 communicating with the first cavity 203 are further disposed on one side of the second insert 200. The first opening 204, the second opening 205 and the third opening 206 are located on different sides of the second insert 200. The second mold body 30 has a second cavity. When the first mold body 20 and the second mold body 30 are in a mold-closing state, the second opening 205 is covered by the first mold body 20, and the second cavity is communicated with the first cavity 203 through the third opening 206.

[0066] It can be understood that in order for the second insert 200 to be able to move relative to the first mold body 20, the cross-sectional area of ​​the second insert 200 close to the second mold body 30 needs to be greater than or equal to the cross-sectional area away from the second mold body 30. Preferably, in order for the second insert 200 to be able to move smoothly from the initial position to the third position relative to the second mold body 30, at least one side of the second insert 200 is inclined toward the first mold body 20, so that the inclined surface can form a guide surface to facilitate the second insert 200 to be disengaged from the first mold body 20, so that the second insert 200 can be smoothly moved from the initial position to the third position relative to the second mold body 30.

[0067] For example, see Fig.10 and 11 For the purpose of illustration, the base of the second insert 200 is roughly arranged in a prism shape, and the peripheral sides of the second insert 200 are all inclined toward the first mold body 20.

[0068] In an exemplary embodiment, when the first mold body 20 and the second mold body 30 are in a mold-closing state, the first insert 100, the second insert 200, and the first mold body 20 enclose a first injection cavity for injection molding a mold 40 having an undercut 41. The second insert 200 is provided with a first cavity 203 and a first opening 204, a second opening 205, and a third opening 206 communicating with the first cavity 203 on one side, and the first opening 204, the second opening 205, and the third opening 206 are located on different sides of the second insert 200; the second mold body 30 has a second cavity, and the second cavity is communicated with the first cavity 203 through the first opening 204; when the first mold body 20 and the second mold body 30 are in a mold-closing state, the second opening 205 is covered by the first mold body 20, and the first insert 100 extends from the third opening 206 into the first cavity 203. In other embodiments, there may be no second opening 205.

[0069] For initial position, see Figures 1 to 3 As shown, it means that when the first mold body 20 and the second mold body 30 are in a mold closing state, taking the second mold body 30 as a reference, the position of the first insert 100 is the initial position of the first insert 100, and the position of the second insert 200 is the initial position of the second insert 200.

[0070] Regarding the first position, Figure 4 and Figure 5 As shown, it means that, taking the second mold body 30 as a reference, during the process of opening the first mold body 20 and the second mold body 30, the first insert 100 just leaves the first cavity 203, or the first insert 100 leaves the first cavity 203 a short distance. At this time, the second insert 200 is still in the initial position of the second insert 200.

[0071] Regarding the second and third positions, Figure 6 and Figure 7As shown, it refers to that, with the second mold body 30 as a reference, during the process of opening the mold of the first mold body 20 and the second mold body 30, when the first insert 100 just leaves the first cavity 203, or after the first insert 100 leaves the first cavity 203 for a short distance, as the second mold body 30 continues to move away from the first mold body 20 along the first direction, when the first insert 100 moves from the first position to the second position relative to the second mold body 30, the second insert 200 moves from the initial position to the third position relative to the second mold body 30. In other words, the second position refers to the position of the first insert 100 when the undercut 41 is separated from the first cavity 203; the third position refers to the position of the second insert 200 when the undercut 41 is separated from the first cavity 203.

[0072] Regarding the first direction, it can be understood that when the mold is opened, the direction in which the second mold body 30 moves can make the module 40 and the first mold body 20 separate smoothly. That is to say, the first direction can be a direction perpendicular to the parting surface between the first mold body 20 and the second mold body 30, or it can be a direction with a very small angle with the direction perpendicular to the parting surface. Generally speaking, the angle range is not greater than 10°. Specifically, the angle range includes but is not limited to 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9° or 10°. In one embodiment, it can refer to the vertical direction.

[0073] In one embodiment, in order to enable the mold 40 to be smoothly core-pulled and demolded, the core-pulling mechanism 10 includes a limiting assembly 300. When the first insert 100 moves from its initial position to the first position, the limiting assembly 300 is used to limit the second insert 200 to the initial position. In this way, the embodiment, through the setting of the limiting assembly 300, enables the second insert 200 to remain stationary during the process of the first insert 100 moving to the first position. As the first insert 100 leaves the first cavity 203, the undercut 41 end of the mold 40 has a space for deformation, so that the mold 40 can be smoothly core-pulled and demolded.

[0074] Regarding the limiting assembly 300, there are many forms of the limiting assembly 300, such as Figure 2What is shown is a combination of a reset member 310 and a limit member, or a single reset member 310, etc. In other embodiments, the limit assembly 300 can also be in a locked form, for example, a through hole is provided in the first mold body 20, and a limit pin is provided in the through hole, and the limit pin can move along the through hole. When the first mold body 20 and the second mold body 30 are in the process of mold opening, when the first insert 100 has not reached the first position, part of the limit pin extends out of the through hole, locking the second insert 200 in the initial position. When the first insert 100 reaches the position, the limit pin is triggered to shrink back to the through hole, and the limit assembly 300 is unlocked, so that the second insert 200 can follow the mold opening process, and the second insert 200 moves from the initial position to the third position relative to the second mold body 30. However, the above structure is relatively complex.

[0075] In a preferred implementation, in order to simplify the structure of the position limiting assembly 300, thereby simplifying the structure of the core pulling assembly and even the injection mold 1, the position limiting assembly 300 uses a reset member 310, wherein the reset member 310 is usually an elastic element, which has an object that can restore the original state and resist external deformation, and the elastic element usually has a spring or an elastic sheet, etc. Preferably, the reset member 310 is a spring.

[0076] Exemplarily, the position limiting assembly 300 includes a reset member 310, which is disposed between the first mold body 20 and the second insert 200; during the process of closing the mold of the first mold body 20 and the second mold body 30, the reset member 310 deforms and stores energy; during the process of opening the mold of the first mold body 20 and the second mold body 30, before the first insert 100 moves to the first position, the reset member 310 releases the stored energy to limit the second insert 200 to the second mold body 30. In this embodiment, the reset member 310 can be connected to the second insert 200, and before the first insert 100 moves to the first position, the reset member 310 releases the stored energy to limit the second insert 200 to the second mold body 30. When the first insert 100 moves from the first position to the second position relative to the second mold body 30, the reset member 310 can give a pulling force to the second insert 200, so that the second insert 200 moves from the initial position to the third position relative to the second mold body 30.

[0077] Taking into account that in the previous implementation, the reset member 310 is directly used to give the second insert 200 a pulling force, and in the process of moving the second insert 200 from the initial position to the third position relative to the second mold body 30, the reset member 310 (spring) is easily deformed. In another preferred embodiment, the limiting assembly 300 includes a connecting member 320, and the connecting member 320 includes a limiting portion 321 and a second connecting portion 322, and the reset member 310 is arranged around the second connecting portion 322; a first mounting hole 201 and a second mounting hole 202 that are interconnected are provided in the second insert 200, the limiting portion 321 is provided in the first mounting hole 201, and the second connecting portion 322 is passed through the second mounting hole 202, and the end of the second connecting portion 322 away from the limiting portion 321 is connected to the first mold body 20; when the first mold body 20 moves to the first position, the limiting portion 321 abuts against the second insert 200. In this way, the present embodiment makes it difficult for the reset member 310 (spring) to deform by setting the connecting member 320, and the control of the movement timing of the second insert 200 is better, and the demoulding process of the undercut 41 is more precise.

[0078] Preferably, in order to reduce manufacturing costs, the connecting member 320 is a screw of equal height, and in this case, a threaded hole adapted to connect with the screw of equal height is provided on the first mold body. And / or, the reset member 310 is a spring. In this way, the limit assembly 300 can directly select existing parts according to needs, without personalized customization, thereby reducing the manufacturing cost of the mold.

[0079] The utility model also proposes an injection mold 1, which includes a first mold body 20, a second mold body 30 and a core pulling mechanism 10. The specific structure of the core pulling mechanism 10 refers to the above-mentioned embodiment. Since the injection mold 1 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0080] In a preferred embodiment, the injection mold 1 has a plurality of the core pulling mechanisms 10, and the plurality of the core pulling mechanisms 10 are arranged along the length extension direction of the first mold body 20. That is to say, in this embodiment, a plurality of modules 40 can be injection molded at the same time. Preferably, the plurality of the core pulling mechanisms 10 are evenly spaced along the length extension direction of the first mold body 20. In this embodiment, taking the air-conditioning louvers as an example, the spacing between adjacent louvers can be determined according to the size of the louvers after being loaded into the air handling device, so that after the louvers are demolded by the undercut 41 in this process, the plurality of louvers left on the second mold body 30 can follow the second mold body 30 into the next assembly process, so that the technical solution of this embodiment can meet the spatial position requirements of in-mold assembly for such products, and is more suitable for the promotion of in-mold assembly technology.

[0081] Of course, the plurality of core pulling mechanisms 10 may also be arranged in other directions. In other embodiments, in order to further reduce the space occupied by the injection mold 1, the plurality of second inserts 200 may also be integrally formed.

[0082] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A core pulling mechanism, applied to an injection mold, characterized in that: The injection mold comprises a first mold body and a second mold body, and the core pulling mechanism comprises: A first insert, disposed on the first mold body; A second insert is provided in the first mold body, the second insert is located between the first mold body and the second mold body, the second insert has a first cavity and a first opening, and the first cavity is configured in an inverted shape; When the first mold body and the second mold body are in a mold-closing state, the first insert extends from the opening into the first cavity, and the first insert, the second insert, the first mold body and the second mold body enclose an injection cavity for an injection mold; When the first mold body and the second mold body are in the process of opening the mold, the first insert and the second insert can move along the first direction relative to the second mold body, wherein when the first insert moves from its initial position to the first position, the second insert is limited to the initial position; when the first insert moves from the first position to the second position relative to the second mold body, the second insert moves from its initial position to the third position.

2. The core pulling mechanism according to claim 1, characterized in that: The core pulling mechanism includes a limiting assembly, and when the first insert moves from its initial position to the first position, the limiting assembly is used to limit the second insert to the initial position.

3. The core pulling mechanism according to claim 2, characterized in that: The limiting assembly is installed in the first mold body, the second insert is arranged between the second mold body and the limiting assembly, and the second insert is slidably connected to the limiting assembly.

4. The core pulling mechanism according to claim 3, characterized in that: The limiting assembly includes a reset member, and the reset member is arranged between the first mold body and the second insert; During the process of closing the first mold body and the second mold body, the reset member deforms and stores energy; During the process of opening the first mold body and the second mold body, before the first insert moves to the first position, the reset member releases stored energy to limit the second insert to the initial position.

5. The core pulling mechanism according to claim 4, characterized in that: The limiting assembly includes a connecting member, which includes a limiting portion and a second connecting portion, and the resetting member is arranged around the second connecting portion; a first mounting hole and a second mounting hole that are interconnected are provided in the second insert, the limiting portion is arranged in the first mounting hole, the second connecting portion is passed through the second mounting hole, and one end of the second connecting portion away from the limiting portion is connected to the first mold body; when the first mold body moves to the first position, the limiting portion abuts against the second insert.

6. The core pulling mechanism according to claim 5, characterized in that: The connecting member is a screw of equal height, and / or the resetting member is a spring.

7. The core pulling mechanism according to claim 1, characterized in that: The first insert comprises a first connecting portion and an embedding portion which are connected to each other, wherein the first connecting portion is used to be connected to the first mold body; when the first mold body and the second mold body are in a mold closing state, the embedding portion extends into the first cavity.

8. The core pulling mechanism according to claim 1, characterized in that: At least one side surface of the second insert is inclined toward the first mold body.

9. The core pulling mechanism according to claim 1, characterized in that: A second opening and a third opening communicating with the first cavity are further provided on one side of the second insert, and the first opening, the second opening and the third opening are located on different sides of the second insert; the second mold body has a second cavity; When the first mold body and the second mold body are in a mold closing state, the second opening is covered by the first mold body, and the second cavity is connected with the first cavity through the third opening.

10. An injection mold, characterized in that: include: The first model; A second mold body, the second mold body is used to mold with the first mold body to injection mold the molded part; as well as A core pulling mechanism as claimed in any one of claims 1 to 9.

11. The injection mold according to claim 10, characterized in that: The injection mold has a plurality of core pulling mechanisms, and the plurality of core pulling mechanisms are arranged along the length extension direction of the first mold body.

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