Injection mold

Abstract

The utility model discloses an injection mold, and relates to the technical field of product molding, the injection mold comprises a fixed mold assembly, a movable mold assembly and a core pulling assembly, the fixed mold assembly comprises a rear mold plate and a mold core convexly arranged on the rear mold plate along a first direction; the movable mold assembly comprises a push plate which is arranged on the mold core in a sleeving mode and can be movably arranged in the first direction, a front mold plate which can be movably arranged in the first direction relative to the push plate is arranged on the side, away from the rear mold plate, of the push plate, and a mold cavity arranged on the mold core in a sleeving mode is formed in the front mold plate. The core pulling assembly comprises at least one forming block movably arranged on the push plate in the second direction, and the forming block is provided with a forming position and a core pulling position in the moving stroke of the forming block. According to the technical scheme, in the ejection process of the push plate, the forming block moves along with the push plate, supporting on a groove or a hole in the deep cavity piece is kept, the possibility that the deep cavity piece is prone to deformation due to the fact that the local strength of the deep cavity piece becomes low due to the arrangement of the groove or the hole is reduced, and the product yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of product molding, in particular to an injection mold. Background Art

[0002] An injection mold is a type of mold that injects heated, molten material into the mold cavity under high pressure, and then cools and solidifies to produce a product. Deep-cavity parts with grooves or holes require a push plate to eject and a slider to eject from the side during demolding. In conventional injection molds, the slider is typically moved away from the product until it separates, and then the push plate is used to eject the product from the core. However, the presence of the upper grooves or holes in deep-cavity parts weakens the parts' local strength, making it easy for the push plate to eject the parts, which can easily cause deformation and cracking. Utility Model Content

[0003] The main purpose of the utility model is to provide an injection mold, which aims to at least solve the problem in the related art that the injection mold corresponding to the deep cavity part with grooves or holes is prone to deformation and cracking when demolding.

[0004] To achieve the above-mentioned purpose, the present invention provides an injection mold, comprising:

[0005] A fixed mold assembly, comprising a rear mold plate and a core protruding from the rear mold plate along a first direction;

[0006] a movable mold assembly, comprising a push plate sleeved on the core and movable along a first direction, a front mold plate movable relative to the push plate along the first direction provided on a side of the push plate away from the rear mold plate, the front mold plate being provided with a mold cavity sleeved on the core; and

[0007] The core pulling assembly comprises at least one forming block movably arranged on the push plate along the second direction, wherein the forming block has a forming position and a core pulling position within its movable stroke;

[0008] In the molding position, the molding block is at least partially located inside the mold cavity in the second direction, so as to enclose the mold core, the mold cavity and the push plate to form a molding cavity, wherein the molding cavity is used for injection molding a deep cavity part having a groove or a hole on at least one side thereof;

[0009] At the core-pulling position, the forming block is located outside the cavity in the second direction.

[0010] In one embodiment, the core pulling assembly further includes a transmission structure disposed between the forming block and the rear template, and the transmission structure is configured to drive the forming block to move to the core pulling position when the push plate moves away from the rear template along a first direction.

[0011] In one embodiment, the transmission structure includes a guide member protruding from the rear template along a first direction, the guide member including a main body section provided on the rear template and a guide section provided at an end of the main body section away from the rear template, and at least a side of the guide section opposite to the core is inclined in a direction away from the core;

[0012] A first guiding inclined surface is correspondingly provided on the forming block.

[0013] In one embodiment, at the molding position, the guide segment and the molding block are spaced apart in a first direction, and the molding block abuts against a side of the main segment facing the core.

[0014] In one embodiment, a side of the guide section opposite to the core is inclined in a direction away from the core;

[0015] A second guiding inclined surface is correspondingly provided on the forming block.

[0016] In one embodiment, the forming block is provided with a through hole extending along the first direction, and two side walls of the through hole in the second direction are at least partially inclined away from the core to form the first guiding inclined surface and the second guiding inclined surface.

[0017] In one embodiment, at the molding position, the guide segment and the molding block are spaced apart in a first direction, and the molding block abuts against a side of the main segment facing the core;

[0018] A side wall of the through hole close to the core includes an inclined section and a flat section away from the rear template;

[0019] The inclined section constitutes the second guiding slope, and the flat section is used to abut against the side of the main section facing the core at the molding position.

[0020] In one embodiment, the core pulling assembly further includes a reset member disposed between the push plate and the forming block, and the reset member is used to reset the forming block to the core pulling position.

[0021] In one embodiment, an abutment portion is provided on a side of the front template facing the push plate, and the abutment portion is used to abut against a side of the forming block away from the core at the forming position.

[0022] In one embodiment, the side of the abutment portion facing the forming block is at least partially inclined away from the forming block; and / or,

[0023] The forming block is at least partially inclined toward a direction away from the abutting portion on a side facing the abutting portion.

[0024] In the technical solution of the present utility model, the core is convexly arranged on the rear template along the first direction, the push plate is sleeved on the core and can move along the first direction, the front template is arranged on the side of the push plate away from the rear template and can move along the first direction, and the molding block is movably arranged on the push plate along the second direction to have a molding position and a core pulling position. In the molding position, the molding block is at least partially located on the inner side of the mold cavity in the second direction to enclose the core, the mold cavity and the push plate to form a molding cavity. The molding cavity is used for injection molding of a deep cavity part with a groove or a hole on at least one side, wherein the molding block is located inside the mold cavity in the second direction. The side parts correspond to the grooves or holes formed on the deep cavity part; with such arrangement, when demoulding, the front template moves in the direction away from the push plate, so that the side wall of the cavity is separated from the core, and the deep cavity part can be ejected from the core by the push plate. In the process of ejection of the push plate, the forming block arranged on the push plate follows the movement, maintaining support for the grooves or holes on the deep cavity part, reducing the possibility of easy deformation of the deep cavity part caused by the low local strength of the deep cavity part caused by the arrangement of the grooves or holes, thereby improving the product yield. After the deep cavity part is ejected, the forming block is moved to the core-pulling position to complete the demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of a deep cavity component;

[0027] Figure 2 It is a structural schematic diagram of an injection mold in the prior art;

[0028] Figure 3 A schematic cross-sectional view of an embodiment of an injection mold provided by the present invention;

[0029] Figure 4 for Figure 3 A magnified schematic diagram of part A in FIG;

[0030] Figure 5 for Figure 3 Schematic diagram of the structure of the injection mold during the demoulding process;

[0031] Figure 6 for Figure 3Schematic diagram of the structure of the molding block of the injection mold in the core-pulling position;

[0032] Figure 7 for Figure 6 A magnified schematic diagram of part B in FIG.

[0033] Figure 8 for Figure 3 Another cross-sectional structural diagram of the injection mold.

[0034] Description of Figure Numbers:

[0035] 100. Injection mold; 1. Fixed mold assembly; 11. Rear template; 12. Core; 2. Moving mold assembly; 21. Push plate; 22. Front template; 221. Abutment portion; 3. Core-pulling assembly; 31. Molding block; 311. First guide slope; 312. Second guide slope; 313. Through hole; 3131. Inclined section; 3132. Flat section; 32. Guide member; 321. Main section; 322. Guide section; 4. Reset member; 5. Pull rod structure; 200. Deep cavity member.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), 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.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. 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 mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Injection mold is a mold that injects heated and molten material into the mold cavity under high pressure, and then cools and solidifies to obtain a product. Figure 1 and Figure 2 For the deep cavity part 200 with a groove or hole, the ejection of the push plate 3' and the side ejection of the slider 1' are required during demolding. In the injection mold in the related art, the slider 1' is usually moved away from the product until it separates, and then the product is ejected from the core 2' by the push plate 3'. However, due to the presence of the upper groove or hole of the deep cavity part 200, the local strength of the deep cavity part 200 is weakened, which can easily cause the product to deform and crack when the push plate 3' is ejected.

[0041] The main purpose of the utility model is to provide an injection mold, which aims to at least solve the problem in the related art that the injection mold corresponding to the deep cavity part with grooves or holes is prone to deformation and cracking when demolding.

[0042] See also Figure 3 and Figure 4In one embodiment of the present invention, the injection mold 100 includes a fixed mold assembly 1, a movable mold assembly 2, and a core pulling assembly 3. The fixed mold assembly 1 includes a rear mold plate 11 and a core 12 protruding from the rear mold plate 11 along a first direction; the movable mold assembly 2 includes a push plate 21 that is sleeved on the core 12 and can be movably arranged along a first direction. A front mold plate 22 that can be movably arranged relative to the push plate 21 along the first direction is provided on the side of the push plate 21 away from the rear mold plate 11. The front mold plate 22 is provided with a cavity sleeved on the core 12. The core-pulling assembly 3 includes at least one molding block 31 movably arranged on the push plate 21 along the second direction, and the molding block 31 has a molding position and a core-pulling position within its movable stroke; in the molding position, the molding block 31 is at least partially located on the inner side of the cavity in the second direction, so as to form a molding cavity together with the core 12, the cavity and the push plate 21, and the molding cavity is used for injection molding of a deep cavity part 200 with a groove or a hole on at least one side; in the core-pulling position, the molding block 31 is located on the outer side of the cavity in the second direction.

[0043] In the technical solution of the present utility model, the core 12 is convexly provided on the rear template 11 along the first direction, the push plate 21 is sleeved on the core 12 and can move along the first direction, the front template 22 is provided on the side of the push plate 21 away from the rear template 11, and can move along the first direction, the molding block 31 is movably provided on the push plate 21 along the second direction to have a molding position and a core pulling position, in the molding position, the molding block 31 is at least partially located on the inner side of the cavity in the second direction to enclose the core 12, the cavity and the push plate 21 to form a molding cavity, the molding cavity is used for injection molding of a deep cavity part 200 having a groove or a hole on at least one side, wherein the molding block 31 is partially located on the inner side of the cavity in the second direction A groove or hole is correspondingly formed on the deep cavity part 200; with such an arrangement, when demoulding, the front template 22 moves in a direction away from the push plate 21, so that the side wall of the cavity is separated from the core 12, and the deep cavity part 200 can be ejected from the core 12 by the push plate 21. During the ejection process of the push plate 21, the forming block 31 arranged on the push plate 21 follows the movement, maintaining support for the groove or hole on the deep cavity part 200, reducing the possibility of easy deformation of the deep cavity part 200 caused by the low local strength of the deep cavity part 200 due to the arrangement of the groove or hole, thereby improving the product yield. After the deep cavity part 200 is ejected, the forming block 31 is moved to the core pulling position to complete the demoulding.

[0044] It should be noted that the number of the forming blocks 31 can be one, two or even more, and the number is related to the number of the slots or holes on the deep cavity member 200. Figure 3 In the injection mold 100 shown, there are two molding blocks 31, corresponding to two grooves or holes. Due to the differences in the grooves and holes, the positional relationship between the molding block 31 and the core 12 in the molding position is also different; when a groove is required on the deep cavity member 200, in the molding position, the molding block 31 is partially located inside the cavity in the second direction, but there is a gap between the molding block 31 and the core 12, so that a groove can be formed during injection molding; when a hole is required on the side wall of the deep cavity member 200, in the molding position, the molding block 31 is partially located inside the cavity in the second direction and is in close contact with the outer wall of the core 12 in the second direction, so that a hole can be formed.

[0045] The movement of the molding block 31 along the second direction and the movement of the push plate 21 along the first direction can be driven by a driving element alone, or by one driving element; it can be understood that since the molding block 31 needs to move along the first direction in addition to the second direction, the driving element that drives the molding block 31 to move along the second direction needs to be set on the push plate 21 to move along the first direction with the push plate 21. This will cause the structure of the entire injection mold 100 to be complicated. As can be seen from the above, the number of the molding blocks 31 can be set to multiple according to the number of holes or grooves on the deep cavity part 200. If each molding block 31 is controlled separately, it will obviously increase the complexity and cost of the injection mold 100. Therefore, in an embodiment of the present invention, the core pulling assembly 3 also includes a transmission structure arranged between the molding block 31 and the rear template 11, and the transmission structure is used to drive the molding block 31 to the core pulling position when the push plate 21 moves away from the rear template 11 along the first direction; in this way, the molding block 31 and the push plate 21 are connected by the transmission structure, so that when demolding, the movement of the molding block 31 and the push plate 21 only needs to be driven by a driving element, and the overall structure of the injection mold 100 is simpler and the cost is lower; of course, when the number of the molding blocks 31 is multiple, the transmission structure is correspondingly set to multiple.

[0046] Specifically, please refer to Figures 3 to 5In this embodiment, the transmission structure includes a guide member 32 protruding from the rear template 11 along a first direction, the guide member 32 includes a main section 321 provided on the rear template 11 and a guide section 322 provided at one end of the main section 321 away from the rear template 11, and at least one side of the guide section 322 opposite to the core 12 is inclined in a direction away from the core 12; a first guide inclined surface 311 is correspondingly provided on the forming block 31. With this arrangement, the push plate 21 moves in a direction away from the rear template 11 to eject the deep cavity part 200 from the core 12, driving the forming block 31 to move in a direction away from the rear template 11 until the first guide slope 311 on the forming block 31 moves to contact the inclined portion of the guide section 322. Since the side of the guide section 322 that is in contact with the core 12 is inclined in a direction away from the core 12, when the first guide slope 311 contacts the guide section 322, the direction of the force will change, causing the forming block 31 to move in a direction away from the core 12 to the core-pulling position. The present design is not limited to this. The forming block 31 and the rear template 11 can be connected by a hinge rod. By changing the angle of the hinge rod, the movement of the push plate 21 in the first direction can also drive the movement of the forming block 31 in the second direction.

[0047] Please refer to Figure 5 and 6, since the guide section 322 drives the forming block 31 to move along the second direction through the inclined surface and the method, there is no stable connection between the guide section 322 and the forming block 31. When in the core-pulling position, the forming block 31 will be completely separated from the guide member 32. Since the forming block 31 itself can move along the second direction, when it is disturbed by the external environment (such as the vibration of the driving element during the mold closing process), the forming block 31 will slide on its own, which is likely to cause the guide section 322 to be misaligned with the forming block 31, that is, during the mold closing process, the push plate 21 will be When the molding block 31 is moved close to the rear template 11, the guide member 32 may collide with the molding block 31, causing damage to the entire injection mold 100. Therefore, in this embodiment, the core pulling assembly 3 also includes a reset member 4 arranged between the push plate 21 and the molding block 31, and the reset member 4 is used to reset the molding block 31 to the core pulling position; in this way, the molding block 31 is stabilized at the core pulling position by the reset force of the reset member 4 to reduce the possibility of the guide member 32 colliding with the molding block 31 during the mold closing process. This design is not limited to the form of the reset member 4. The sliding friction between the molding block 31 and the push plate 21 can also be designed to be very large, so that the molding block 31 is not easy to move automatically, and the same effect can be achieved; of course, this method will aggravate the wear between the molding block 31 and the push plate 21, and reduce the service life of the injection mold 100.

[0048] The reset member 4 can be in the form of an elastic member, or can be realized in the form of a magnetic member with like poles repelling each other.

[0049] It is understandable that the movement of the forming block 31 toward the core-pulling position and the movement of the push plate 21 away from the rear template 11 can be performed synchronously, or the deep cavity part 200 can be completely ejected from the core 12 by the push plate 21 first, and then the forming block 31 is driven to move toward the core-pulling position. When the movement of the forming block 31 and the push plate 21 is performed synchronously, that is, as long as the push plate 21 moves in the direction away from the rear template 11, it will simultaneously drive the forming block 31 to move toward the core-pulling position. In order to ensure that the forming block 31 can support the hole or groove on the deep cavity part 200, the forming block 31 cannot be separated from the hole or groove before the push plate 21 ejects the deep cavity part 200 from the core 12. That is, this method is only suitable for the deep cavity part 200 with a deeper hole or groove, and has a smaller scope of application. When the cam 321 is in the closed position, the guide 322 and the guide 321 are in the closed position, and the guide 322 is in the closed position, so that the cam 321 is in the closed position.

[0050] It should be noted that since the guide section 322 and the forming block 31 are spaced apart in the first direction, the entire guide member 32 will protrude into the front template 22. Therefore, a receiving groove for accommodating the guide member 32 needs to be opened on the side of the front template 22 facing the push plate 21.

[0051] In order to enable the molding block 31 to automatically move to the molding position when the push plate 21 moves toward the rear template 11, in an embodiment of the present invention, the side of the guide section 322 opposite to the core 12 is inclined toward the direction away from the core 12; and a second guide slope 312 is correspondingly provided on the molding block 31. After the deep cavity component 200 is demolded, the entire injection mold 100 needs to be closed. With such a configuration, when the push plate 21 moves toward the rear template 11, the guide section 322 can contact the second guide slope 312 on the molding block 31. Since the side of the guide section 322 opposite to the core 12 is inclined toward the direction away from the core 12, it can drive the molding block 31 to move toward the core 12 until it moves to the molding position, so as to facilitate subsequent injection molding and ensure the continuity of production.

[0052] There are many ways to form the first guide slope 311. For example, an inclined guide plate can be provided on the forming block 31, or a guiding hole can be provided on the forming block 31, and the side wall of the hole can be set to be inclined. The second guide slope 312 can also be provided with a guide plate or a guiding hole. Since the forming block 31 needs to support the hole or groove of the deep cavity part 200, it itself needs a certain thickness to ensure its strength. If an additional guide plate is provided, the structure of the entire forming block 31 will be more complicated and occupy more space. Therefore, in this embodiment, please continue to refer to Figure 6 and Figure 7 The forming block 31 is provided with a through hole 313 extending along the first direction, and the two side walls of the through hole 313 in the second direction are at least partially inclined in the direction away from the core 12 to form the first guiding slope 311 and the second guiding slope 312; in this way, the first guiding slope 311 and the second guiding slope 312 are formed by the inclination of the side walls of the through hole 313, which does not take up additional space and is more convenient to process. Moreover, only one hole is opened on the forming block 31, which will not have too much impact on its strength.

[0053] It can be understood that the side wall of the through hole 313 can be partially or completely inclined. When the deep cavity part 200 is completely ejected from the core 12 by the push plate 21, the forming block 31 is driven to move toward the core-pulling position, that is, the guide section 322 and the forming block 31 are spaced apart in the first direction. When the forming block 31 abuts against the main section 321 toward one side of the core 12, the through hole 313 is close to the side wall of the core 12 to abut against the main section 321. If the side wall of the through hole 313 is tilted as a whole, the molding block 31 and the active section will be in linear contact. When the side wall of the through hole 313 moves along the first direction relative to the main section 321, it is very easy to cause wear. At the same time, when injection molding is performed in the molding cavity, the pressure of the liquid can easily cause the side wall of the through hole 313 to deform, which may cause the distance between the molding block 31 and the core 12 in the second direction to be greater than the preset distance, so that the accuracy of the deep cavity part 200 formed by injection molding is insufficient and the defective rate of the product is high.

[0054] In the embodiments of the present invention, please continue to refer to Figure 6 and Figure 7 In the molding position, the guide section 322 is spaced apart from the molding block 31 in the first direction, and the molding block 31 abuts against the side of the main section 321 facing the core 12. The side wall of the through hole 313 near the core 12 includes an inclined section 3131 and a flat section 3132 away from the rear mold plate 11. The inclined section 3131 constitutes the second guide slope 312, and the flat section 3132 abuts against the side of the main section 321 facing the core 12 in the molding position. This arrangement divides the side wall of the through hole 313 near the core 12 into the inclined section 3131 and the flat section 3132, meaning that the side wall of the through hole 313 is partially inclined. When the molding block 31 abuts against the main section 321, the abutment is surface contact, not line contact. This reduces the risk of wear and deformation, thereby ensuring the accuracy of the entire injection mold 100.

[0055] Since the guide member 32 is convexly provided on the rear template 11 and is relatively long, equivalent to a cantilever, during injection molding in the molding cavity, the pressure of the liquid will squeeze the molding block 31 in the direction away from the core 12. If the molding block 31 is kept in the molding position only by the contact between the guide member 32 and the molding block 31, it is easy to cause the guide member 32 to bend over time, thereby affecting the service life of the injection mold 100. Therefore, in this embodiment, please refer to Figure 4The front template 22 is provided with an abutment portion 221 on the side facing the push plate 21, and the abutment portion 221 is used to abut against the side of the molding block 31 away from the core 12 at the molding position; in this way, the extrusion force borne by the guide member 32 can be shared by the abutment portion 221, and the abutment portion 221 does not need to be set very long and is not prone to deformation, which is beneficial to improving the service life of the entire injection mold 100.

[0056] It can be understood that during the mold closing process, the push plate 21 first moves to fit with the rear template 11, and then the front template 22 moves to fit with the push plate 21. During this process, the abutment 221 moves along the first direction to abut with the forming block 31 in the second direction. If the normal of the contact surface between the abutment 221 and the forming block 31 extends along the second direction, the abutment 221 and the forming block 31 need to have a certain elasticity so that the abutment 221 is squeezed to abut with the forming block 31, or the abutment 221 can move in the second reverse direction relative to the front template 22. After the abutment 221 follows the front template 22 to move to one end of the forming block 31 in the second direction, the abutment 221 moves along the first direction to abut with the forming block 31. Of these two schemes, the former is more likely to get stuck or break, and the latter will make the structure of the injection mold 100 as a whole more complicated. In the technical solution of the present invention, the abutment portion 221 is at least partially inclined toward one side of the forming block 31 in a direction away from the forming block 31; and / or, one end of the forming block 31 is at least partially inclined toward the direction away from the abutment portion 221; that is, an inclined surface is provided on at least one of the abutment portion 221 and the forming block 31, so that when the front template 22 approaches the push plate 21, the inclined surface on the abutment portion 221 or the forming block 31 can change the direction of the force, so that the forming block 31 is slightly inclined toward the push plate 21. The core 12 can move in the direction of the core 12, thereby facilitating the abutment between the abutment 221 and the forming block 31 in the second direction; of course, if only one of the abutment 221 and the forming block 31 is provided with an inclined surface, it means that the two are in line contact and are prone to wear. Therefore, in a preferred embodiment, the abutment 221 is inclined at least partially away from the forming block 31 on one side of the forming block 31, and the forming block 31 is inclined at least partially away from the abutment 221 on one end of the abutment 221, thereby reducing wear.

[0057] It should be noted that since the abutment portion 221 will slightly squeeze the molding block 31 toward the core 12, when designing the injection mold 100, it is necessary to note that after the push plate 21 moves toward the rear template 11, a margin is left between the molding block 31 and the preset position. This margin is the amount of movement when the abutment portion 221 squeezes the molding block 31 toward the second direction.

[0058] Of course, for the injection mold 100, please refer to Figure 8 A pull rod structure 5 is further provided between the front template 22, the rear template 11 and the push plate 21 to control opening and closing.

[0059] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An injection mold, characterized in that: include: A fixed mold assembly, comprising a rear mold plate and a core protruding from the rear mold plate along a first direction; a movable mold assembly, comprising a push plate sleeved on the core and movable along a first direction, a front mold plate movable relative to the push plate along the first direction provided on a side of the push plate away from the rear mold plate, the front mold plate being provided with a mold cavity sleeved on the core; and The core pulling assembly comprises at least one forming block movably arranged on the push plate along the second direction, wherein the forming block has a forming position and a core pulling position within its movable stroke; In the molding position, the molding block is at least partially located inside the mold cavity in the second direction, so as to enclose the mold core, the mold cavity and the push plate to form a molding cavity, wherein the molding cavity is used for injection molding a deep cavity part having a groove or a hole on at least one side thereof; At the core-pulling position, the forming block is located outside the cavity in the second direction.

2. The injection mold according to claim 1, wherein The core pulling assembly further includes a transmission structure provided between the forming block and the rear template, and the transmission structure is used to drive the forming block to move to the core pulling position when the push plate moves away from the rear template along the first direction.

3. The injection mold according to claim 2, wherein: The transmission structure includes a guide member protruding from the rear template along a first direction, the guide member including a main body section provided on the rear template and a guide section provided at an end of the main body section away from the rear template, and at least a side of the guide section opposite to the core is inclined in a direction away from the core; A first guiding inclined surface is correspondingly provided on the forming block.

4. The injection mold according to claim 3, wherein: At the molding position, the guide segment and the molding block are spaced apart in a first direction, and the molding block abuts against a side of the main segment facing the core.

5. The injection mold according to claim 3, wherein: The side of the guide section opposite to the core is inclined in a direction away from the core; A second guiding inclined surface is correspondingly provided on the forming block.

6. The injection mold according to claim 5, wherein: The forming block is provided with a through hole extending in a first direction, and two side walls of the through hole in a second direction are at least partially inclined in a direction away from the core to form the first guiding inclined surface and the second guiding inclined surface.

7. The injection mold according to claim 6, wherein: At the molding position, the guide section and the molding block are spaced apart in a first direction, and the molding block abuts against a side of the main section facing the core; A side wall of the through hole close to the core includes an inclined section and a flat section away from the rear template; The inclined section constitutes the second guiding slope, and the flat section is used to abut against the side of the main section facing the core at the molding position.

8. The injection mold according to any one of claims 3 to 7, characterized in that The core pulling assembly further includes a reset member disposed between the push plate and the forming block, and the reset member is used to reset the forming block to the core pulling position.

9. The injection mold according to any one of claims 3 to 7, characterized in that The front template is provided with an abutment portion on a side facing the push plate, and the abutment portion is used to abut against a side of the forming block away from the core at the forming position.

10. The injection mold according to claim 9, wherein: The side of the abutting portion facing the forming block is at least partially inclined away from the forming block; and / or, One end of the forming block facing the abutting portion is at least partially inclined in a direction away from the abutting portion.

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