Efficient core-pulling ejection injection mold

Abstract

The utility model discloses an efficient core-pulling ejection injection mold, which relates to the technical field of molds and comprises an upper mold and a lower mold, the upper mold is provided with an upper mold core, the lower mold is provided with a lower mold core, and the upper mold and the lower mold are matched in a butt joint manner, so that the upper mold core and the lower mold core are mutually butted to form a mold cavity for forming a product; the side, away from the upper die, of the lower die is connected with a bearing plate, the bearing plate is provided with an inclined core pulling structure, the inclined core pulling structure comprises a wedge block fixedly installed on the bearing plate and a sliding block located at the end, away from the bearing plate, of the wedge block in a sliding mode, and the end, facing the sliding block, of the wedge block is provided with a T-shaped embedded block. A T-shaped groove matched with the T-shaped insert block of the wedge block is formed in the end, facing the wedge block, of the sliding block, the T-shaped insert block is matched with the T-shaped groove, guiding connection of the wedge block and the sliding block is achieved, and a first product profiling structure in butt joint with the mold cavity is arranged at the end, away from the wedge block, of the sliding block; and the product forming quality is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould technical field, concretely is a kind of high -efficient core-pulling ejection injection mould. BACKGROUND

[0002] In the field of injection molding, in order to manufacture plastic products with complex shape and internal structure, the design of the mold is crucial. The traditional injection mold is usually composed of a simple upper mold and a lower mold, which are respectively provided with an upper mold core and a lower mold core. The two are connected to form a mold cavity. Molten plastic is injected into the mold cavity, and the desired product is obtained after cooling and solidification. However, for some products with reverse buckling, side holes or side concave features, the traditional mold will encounter difficulties during demolding, because these special structures will cause the product to be hindered by the mold during demolding, and cannot be directly taken out of the mold. If forced demolding may damage the product or the mold.

[0003] To solve this problem, various core-pulling structures are introduced into the injection mold. The core-pulling structure can make part of the mold components move relatively during demolding, so that the product can be smoothly separated from the mold cavity. Common core-pulling structures include lateral core-pulling, oblique core-pulling, etc. Lateral core-pulling generally achieves horizontal movement of the slider by setting a slider and a driving mechanism on the side of the mold, so that the reverse buckling or side hole structure on the side of the product can be smoothly demolded. Oblique core-pulling uses a slider with oblique movement to complete product demolding, which is suitable for products with oblique reverse buckling or oblique side hole features.

[0004] However, in the existing oblique core-pulling structure, only a simple slider and driving mechanism are usually used to achieve the oblique core-pulling action, and the guide structure is not stable and accurate enough, which can cause the slider to deviate or be stuck during movement, affecting the service life of the mold and the molding quality of the product. In addition, for some cases where special shapes or features need to be formed at the oblique part inside or outside the product, the existing oblique core-pulling structure cannot meet the requirements, and its function is relatively single, which cannot achieve complex product molding tasks.

[0005] Therefore, it is necessary to propose an improved technical solution to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a technical solution that can solve the above problems.

[0007] A high-efficiency core-pulling ejection injection mold, comprising an upper mold and a lower mold, the upper mold having an upper mold core, the lower mold having a lower mold core, the upper mold and the lower mold being connected to form a mold cavity for molding products.

[0008] The lower die is connected with a bearing plate away from one side of the upper die, and an inclined core-pulling structure is arranged on the bearing plate, which comprises a wedge block fixedly installed on the bearing plate and a sliding block slidably located on one end of the wedge block away from the bearing plate, one end of the wedge block towards the sliding block is provided with a T-shaped block, one end of the sliding block towards the wedge block is provided with a T-shaped groove matched with the T-shaped block of the wedge block, the T-shaped block and the T-shaped groove are matched with each other to realize the guiding connection of the wedge block and the sliding block, and the first product profiling structure is arranged on one end of the sliding block away from the wedge block and is connected with the mold cavity.

[0009] An inclined guide rod is further matched with the bearing plate, a first inclined guide groove is formed in the longitudinal direction of the wedge block and is slidably matched with the inclined guide rod, and the first inclined guide groove is arranged in a staggered manner with the T-shaped block and the sliding block, and the second product profiling structure is arranged on one end of the inclined guide rod away from the wedge block and is connected with the mold cavity.

[0010] As a further scheme of the utility model, the wedge block comprises a first fixed part and a second fixed part which are an integral structure, the end of the first fixed part has an inclined surface, and the sliding block is provided with an inclined surface matched with the inclined surface of the first fixed part;

[0011] The T-shaped block is connected on the inclined surface;

[0012] The second fixed part is arranged in the inclined direction of the inclined surface of the first fixed part, so that the first inclined guide groove arranged in a staggered manner with the T-shaped block and the sliding block is formed on the second fixed part.

[0013] As a further scheme of the utility model, the side of the T-shaped block towards the inclined guide rod is provided with a clearance position matched with the inclined guide rod.

[0014] As a further scheme of the utility model, the first fixed part is provided with a mounting groove matched with the T-shaped block on the inclined surface thereof, and the T-shaped block is detachably connected to the mounting groove.

[0015] As a further scheme of the utility model, a connecting piece is installed between the lower die and the bearing plate, a second inclined guide groove is formed in the longitudinal direction of the connecting piece, and the inclined direction of the second inclined guide groove is consistent with that of the first inclined guide groove, so that the second inclined guide groove and the first inclined guide groove correspondingly form a guide channel acting on the inclined guide rod.

[0016] As a further scheme of the utility model, the side of the bearing plate away from the lower die is connected with a ejector plate, the lower end of the inclined guide rod is connected with the ejector plate, and the top end of the inclined guide rod penetrates through the wedge block and is connected with the mold cavity.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1) Through the guiding connection mode of T-shaped block and T-shaped groove, the stability and precision of the slider in the movement process are improved, and the phenomenon of deviation or jamming of the slider in the inclined movement is reduced, which not only helps to improve the service life of the mold, but also ensures the forming quality of the product, so that the size of the produced product is more accurate and the surface is smoother;

[0019] 2) The unique inclined ejector pin design of the inclined guide rod cooperates with the inclined core-pulling structure, so that it can not only participate in the molding of complex products through the second product profiling structure, but also smoothly eject the product when the mold is opened, and the auxiliary guiding effect of the inclined core-pulling structure on the inclined guide rod ensures the stability of the work of the inclined guide rod;

[0020] 3) The product profiling structures arranged on the inclined guide rod and the slider respectively make the mold be able to form special shapes or features at different positions of the product at the same time, break through the limitation of single function of the existing inclined core-pulling structure, and meet the molding and demolding requirements of products with complex inclined features, thereby expanding the application range of the injection mold.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, some will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a sectional structure schematic diagram of one view of the present application;

[0025] Figure 3 is a sectional structure schematic diagram of another view of the present application;

[0026] Figure 4 is a structural schematic diagram of the cooperation of the inclined core-pulling structure and the inclined guide rod in the present application;

[0027] Figure 5 is an exploded structural schematic diagram of the inclined core-pulling structure in the present application.

[0028] The reference signs and names in the drawings are as follows:

[0029] 1, the upper die; 2, the lower die; 3, the upper die; 4, the lower die; 5, the cavity; 6, the bearing plate; 7, the wedge block; 8, the slider; 9, the T-shaped block; 10, the T-shaped groove; 11, the first product profiling structure; 12, the inclined guide rod; 13, the first inclined guide groove; 14, the second product profiling structure; 15, the first fixed part; 16, the second fixed part; 17, the inclined surface; 18, the inclined surface; 19, the clearance; 20, the mounting groove; 21, the connecting piece; 22, the second inclined guide groove; 23, the ejector pin plate; 24, the lower die base. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] Please refer to Figures 1-5 In the embodiments of the utility model, an efficient core-pulling ejection injection mold comprises an upper die 1 and a lower die 2, the upper die 1 has an upper die 3, the lower die 2 has a lower die 4, the upper die 1 and the lower die 2 are butted and matched to make the upper die 3 and the lower die 4 butt against each other to form a cavity 5 for molding products;

[0032] The side, away from the upper die 1, of the lower die 2 is connected with a bearing plate 6, the bearing plate 6 is provided with an inclined core-pulling structure, the inclined core-pulling structure comprises a wedge block 7 fixedly installed on the bearing plate 6 and a slider 8 slidably located on the end of the wedge block 7, away from the bearing plate 6, the end of the wedge block 7, facing the slider 8, is provided with a T-shaped block 9, the end of the slider 8, facing the wedge block 7, is provided with a T-shaped groove 10 matched with the T-shaped block 9 of the wedge block 7, the T-shaped block 9 and the T-shaped groove 10 are matched with each other to realize the guiding connection of the wedge block 7 and the slider 8, wherein the end of the slider 8, away from the wedge block 7, is provided with a first product profiling structure 11 butted in the cavity 5.

[0033] The bearing plate 6 is also matched with an inclined guide rod 12, a first inclined guide groove 13 slidably matched with the inclined guide rod 12 is opened along the longitudinal direction of the wedge block 7, and the first inclined guide groove 13 is arranged in dislocation with the T-shaped block 9 and the slider 8, wherein the end of the inclined guide rod 12, away from the wedge block 7, is provided with a second product profiling structure 14 butted in the cavity 5.

[0034] The upper die 1 and the lower die 2 are connected, the upper die kernel 3 and the lower die kernel 4 are precisely matched, and a mold cavity 5 is constructed; during injection molding, the molten plastic is quickly injected into the mold cavity 5 under the driving of pressure, and after the plastic is cooled and solidified, a plastic product with a specific shape is formed;

[0035] The wedge block 7 is firmly fixed on the bearing plate 6, the slider 8 is embedded with the T-shaped block 9 of the wedge block 7 through the T-shaped groove 10, the guiding connection is realized, when the mold is opened, the bearing plate 6 is separated from the lower die 2, the slider 8 stably slides along the predetermined direction under the action of the wedge block 7, and the first product profiling structure 11 is arranged at one end of the slider 8 away from the wedge block 7; the structure is matched with the shape of the product, such as the inclined undercut part, can be smoothly pulled out from the undercut part when the slider 8 slides, and prepares for subsequent product demolding;

[0036] The bearing plate 6 is matched with the inclined guide rod 12, the wedge block 7 is provided with the first inclined guide groove 13 in the longitudinal direction and is slidably matched with the inclined guide rod 12, and the inclined guide rod 12 is essentially an inclined ejector pin structure and is guided by the first inclined guide groove 13; in the mold opening process, the movement of the wedge block 7 and the slider 8 in the inclined core-pulling structure plays an auxiliary guiding role on the inclined guide rod 12; the second product profiling structure 14 is arranged at one end of the inclined guide rod 12 away from the wedge block 7, participates in the molding process of the product during mold closing and injection molding, and helps to shape the complex shape of the product; the inclined guide rod 12 can eject the product from the mold cavity 5 during mold opening, and realizes the demolding of the product;

[0037] Through the guiding connection mode of the T-shaped block 9 and the T-shaped groove 10, the stability and precision of the slider 8 in the movement process are improved, the deviation or jamming phenomenon of the slider 8 in the inclined movement is reduced, the service life of the mold is improved, the molding quality of the product is ensured, the size of the produced product is more accurate, and the surface is smoother; the unique inclined ejector pin design of the inclined guide rod 12 cooperates with the inclined core-pulling structure, so that the inclined guide rod 12 can participate in the molding of the complex product through the second product profiling structure 14 and can smoothly eject the product during mold opening; at the same time, the auxiliary guiding effect of the inclined core-pulling structure on the inclined guide rod 12 guarantees the stability of the work of the inclined guide rod 12; the product profiling structures arranged on the inclined guide rod 12 and the slider 8 respectively enable the mold to form special shapes or features at different positions of the product at the same time, break through the limitation that the existing inclined core-pulling structure has single function, and can meet the molding and demolding requirements of the product with complex inclined features, so that the application range of the injection mold is expanded.

[0038] In the utility model embodiment, the wedge block 7 includes the first fixed part 15 and the second fixed part 16 which are integrated structures, the end of the first fixed part 15 has the inclined surface 17, and the slider 8 is provided with the inclined surface 18 matched with the inclined surface 17 of the first fixed part 15;

[0039] The T-shaped block 9 is connected to the inclined surface 17 of the first fixed part 15;

[0040] The second fixed part 16 is arranged along the inclined surface 17 of the first fixed part 15, and the first inclined guide groove 13 is formed on the second fixed part 16.

[0041] The wedge block 7 is designed as an integrated structure of the first fixed part 15 and the second fixed part 16, the inclined surface 17 of the first fixed part 15 is matched with the inclined surface 18 of the sliding block 8, the two inclined surfaces 18 are tightly matched when the mold is closed, the wedge effect of the inclined surface 18 can effectively resist the pressure of the plastic melt on the sliding block 8 during the injection molding process, so that the sliding block 8 can keep a stable position during the molding process, and the size precision of the product is ensured, meanwhile, the T-shaped block 9 on the inclined surface 17 is matched with the T-shaped groove 10 of the sliding block 8, which provides accurate guidance for the sliding of the sliding block 8 when the mold is opened, and the first inclined guide groove 13 is arranged on the second fixed part 16 along the direction of the inclined surface 17 of the first fixed part 15, and the inclined guide rod 12 moves along the first inclined guide groove 13 during the movement of the mold, so as to facilitate the accurate movement of the inclined guide rod 12.

[0042] The wedge block 7 is designed as an integrated structure of the first fixed part 15 and the second fixed part 16, the inclined surface 17 of the first fixed part 15 is matched with the inclined surface 18 of the sliding block 8, the two inclined surfaces 18 are tightly matched when the mold is closed, the wedge effect of the inclined surface 18 can effectively resist the pressure of the plastic melt on the sliding block 8 during the injection molding process, so that the sliding block 8 can keep a stable position during the molding process, and the size precision of the product is ensured, meanwhile, the T-shaped block 9 on the inclined surface 17 is matched with the T-shaped groove 10 of the sliding block 8, which provides accurate guidance for the sliding of the sliding block 8 when the mold is opened, and the first inclined guide groove 13 is arranged on the second fixed part 16 along the direction of the inclined surface 17 of the first fixed part 15, and the inclined guide rod 12 moves along the first inclined guide groove 13 during the movement of the mold, so as to facilitate the accurate movement of the inclined guide rod 12.

[0043] In the embodiment of the utility model, the T-shaped block 9 is provided with the avoidance position 19 matched with the inclined guide rod 12 on the side towards the inclined guide rod 12.

[0044] In the structure design of the injection mold, the avoidance position 19 is arranged on the side of the T-shaped block 9 towards the inclined guide rod 12, and the design purpose is to provide sufficient space for the movement of the inclined guide rod 12, so as to avoid the interference between the T-shaped block 9 and the inclined guide rod 12 during the movement of the mold, when the mold is opened and closed, the inclined guide rod 12 moves along the first inclined guide groove 13 on the second fixed part 16 of the wedge block 7, and the sliding block 8 slides and cores through the cooperation of the T-shaped block 9 and the T-shaped groove 10, the existence of the avoidance position 19 makes the inclined guide rod 12 and the T-shaped block 9 not interfere with each other in the respective movement tracks, and the corresponding actions are smoothly completed, so as to ensure the coordination and stability of the overall movement of the mold.

[0045] In the embodiment of the utility model, the first fixed part 15 is provided with the installation groove 20 matched with the T-shaped block 9 on the inclined surface 17, and the T-shaped block 9 is detachably connected to the installation groove 20.

[0046] In the structure design of the wedge block 7 of the injection mold, the first fixed part 15 is provided with a mounting groove 20 on the inclined surface 17, and the T-shaped block 9 is detachably mounted in the groove. This design mainly considers that the T-shaped block 9 as a key transmission and guiding part is prone to wear due to frequent friction and stress during long-term use of the mold. When the T-shaped block 9 is worn and affects the normal operation of the mold, the detachable design enables the T-shaped block 9 to be conveniently taken out from the mounting groove 20 for replacement or maintenance. At the same time, the matching design of the mounting groove 20 and the T-shaped block 9 ensures the stability and accuracy of the T-shaped block 9 after installation, so that the T-shaped block 9 can accurately cooperate with the T-shaped groove 10 of the sliding block 8 during the operation of the mold, and the smooth guiding and core-pulling action of the sliding block 8 is realized.

[0047] In the embodiment of the utility model, connecting piece 21 is installed between lower mould 2 and bearing plate 6, second inclined guide groove 22 is opened along the longitudinal direction of connecting piece 21, and the inclination direction of second inclined guide groove 22 is consistent with first inclined guide groove 13, so that second inclined guide groove 22 and first inclined guide groove 13 correspondingly form the guide channel acting on inclined guide rod 12.

[0048] The design principle is to provide more stable and accurate guide path for inclined guide rod 12. When the mold is opened and closed, inclined guide rod 12 needs to move along a specific track to realize the ejection operation. The guide channel formed by the corresponding first inclined guide groove 13 and second inclined guide groove 22 can ensure that inclined guide rod 12 always remains on the predetermined track during movement, avoiding deviation or shaking. The double-groove guiding design enhances the constraint ability of inclined guide rod 12, making the movement of inclined guide rod 12 more stable and reliable, so as to ensure that the second product profiling structure 14 connected thereto can accurately complete the ejection operation, improving the precision and stability of the mold ejection.

[0049] In one embodiment, the second inclined guide groove 22 of the connecting piece 21 provides an accurate guide path for the inclined guide rod 12, and the first inclined guide groove 13 of the wedge block 7 is in a let-out fit with the inclined guide rod 12 to provide the inclined guide rod 12 with a corresponding movement path to realize the ejection of the product.

[0050] In the embodiment of the utility model, the side of bearing plate 6 away from lower mould 2 is connected with ejector plate 23, the lower end of inclined guide rod 12 is connected with ejector plate 23, and the top end of inclined guide rod 12 penetrates through wedge block 7 and is in butt joint with mold cavity 5.

[0051] It can be understood that the top pin plate 23 is provided with corresponding inclined top seats, and the lower end of the inclined guide rod 12 is in sliding connection with the inclined top seats; when the mold starts to open, the bearing plate 6 is first separated from the lower mold 2 together with the lower mold base 24, and at the same time, the upper mold 1 is also separated from the lower mold 2, in this process, the bearing plate 6 and the wedge block 7 fixed thereon gradually move away from the lower mold 2, due to the cooperation between the T-shaped block 9 on the wedge block 7 and the T-shaped groove 10 on the sliding block 8, and the cooperation between the inclined surface 17 at the end of the wedge block 7 and the inclined surface 18 on the sliding block 8, the movement of the wedge block 7 drives the sliding block 8 to realize the inclined core-pulling action;

[0052] In the initial stage of the separation of the bearing plate 6 together with the lower mold base 24 from the lower mold 2, the top pin plate 23 is temporarily kept stationary, when the bearing plate 6 and the lower mold base 24 complete a certain stroke of movement, the external power drives the top pin plate 23 to move towards the lower mold 2, and the inclined guide rod 12 in sliding connection with the inclined top seats further penetrates into the mold cavity 5 along with the movement of the top pin plate 23, so as to eject the product from the mold cavity 5, at the same time, the conventional ejector pins can also be combined to act together, so as to ensure that the product can smoothly and completely separate from the mold cavity 5.

[0053] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A high efficiency core-pulling injection mold characterized by, The upper die has an upper die core, and the lower die has a lower die core, the upper die and the lower die are in abutting fit to make the upper die core and the lower die core abut each other to form a die cavity for forming a product; The side of the lower die away from the upper die is connected with a supporting plate, the supporting plate is provided with an inclined core-pulling structure, the inclined core-pulling structure comprises a wedge block fixedly installed on the supporting plate and a sliding block slidably located on the end of the wedge block away from the supporting plate, the end of the wedge block towards the sliding block is provided with a T-shaped block, the end of the sliding block towards the wedge block is provided with a T-shaped groove matched with the T-shaped block of the wedge block, the T-shaped block and the T-shaped groove are matched with each other to realize the guiding connection of the wedge block and the sliding block, and the end of the sliding block away from the wedge block is provided with a first product profiling structure abutting the die cavity. The supporting plate is also matched with an inclined guide rod, a first inclined guide groove is formed in the longitudinal direction of the wedge block and is slidably matched with the inclined guide rod, and the first inclined guide groove is arranged in a staggered manner with the T-shaped block and the sliding block, and the end of the inclined guide rod away from the wedge block is provided with a second product profiling structure abutting the die cavity.

2. A high efficiency undercut ejection injection mold according to claim 1, characterized in that, The wedge block comprises a first fixed part and a second fixed part which are an integral structure, the end of the first fixed part has an inclined surface, and the sliding block is provided with an inclined surface matched with the inclined surface of the first fixed part; The T-shaped block is connected to the inclined surface; The second fixed part is arranged in the inclined direction of the inclined surface of the first fixed part to form the first inclined guide groove arranged in a staggered manner with the T-shaped block and the sliding block on the second fixed part.

3. A high efficiency undercut ejection injection mold according to claim 2, wherein, The side of the T-shaped block towards the inclined guide rod is provided with a clearance matched with the inclined guide rod.

4. A high efficiency undercut ejection injection mold in accordance with claim 2 wherein, The first fixed part is provided with a mounting groove matched with the T-shaped block on the inclined surface, and the T-shaped block is detachably connected to the mounting groove.

5. A high efficiency undercut ejection injection mold according to any one of claims 1-4, characterized in that, A connecting piece is installed between the lower die and the supporting plate, a second inclined guide groove is formed in the longitudinal direction of the connecting piece, and the second inclined guide groove is in the same inclined direction as the first inclined guide groove to form a guide channel acting on the inclined guide rod corresponding to the first inclined guide groove.

6. A high efficiency undercut ejection injection mold according to any one of claims 1-4, characterized in that, The side of the supporting plate away from the lower die is connected with a ejector plate, the lower end of the inclined guide rod is connected with the ejector plate, and the top end of the inclined guide rod penetrates through the wedge block and is in abutting fit with the die cavity.

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