Injection mold frame multi-module splicing locking tool

Abstract

This utility model relates to the field of injection molding auxiliary tooling technology, specifically to a multi-module splicing and locking tooling for injection mold frames. The tooling includes a base, a positioning component, a locking component, guide pillars, a fixed mold, a moving mold, and a cavity. High-precision module positioning is achieved by slidingly engaging guide blocks on the outer wall of the guide pillars with guide grooves on the inner wall of the fixed mold, combined with the vertical insertion of a bottom locking block of the fixed mold with a top locking groove of the base. The cavity is pre-positioned by an interference fit between a top mounting block and a mounting groove on the inner wall of the moving mold. The locking component secures the fixed mold to the base with a first mounting screw and then screws a second mounting screw through the side wall of the moving mold into the cavity to complete the locking. This utility model, through the synergistic effect of multiple nested positioning and spiral locking, solves the problems of low replacement accuracy and unstable splicing in existing mold frames, significantly improving assembly and disassembly efficiency and preventing displacement under injection impact, thus enhancing structural rigidity and ensuring quality.

Description

Technical Field

[0001] This utility model relates to the field of injection molding auxiliary tooling technology, and in particular to a multi-module splicing and locking tooling for injection molding mold frames. Background Technology

[0002] In the injection molding process, in order to adapt to the production specifications and shape requirements of different products, it is usually necessary to frequently replace and reassemble the fixed mold and cavity modules inside the mold frame.

[0003] However, in current injection mold production practices, the alignment and switching between modules mainly rely on manual visual calibration or simple mechanical positioning pins. This operation method not only consumes a lot of time during disassembly and assembly, but also, under high-frequency production switching, the lack of a precise and stable guiding structure easily leads to a gradual increase in the assembly tolerance between modules. With the continuous action of the injection molding machine's clamping pressure and the strong lateral impact force generated when the melt is injected, if the locking structure of the splicing modules is not stable enough, micron-level misalignment or loosening can easily occur between the modules. This will not only directly lead to quality defects such as overflow, flash, or dimensional deviations in the injection molded products, but also accelerate the wear and damage of the precision surfaces of the mold, increase the maintenance cost of the mold, and reduce the overall operating efficiency of the production line.

[0004] Therefore, this utility model proposes a multi-module splicing and locking fixture for injection mold frames to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of low positioning accuracy of module replacement, cumbersome disassembly and assembly steps and low efficiency, as well as insufficient stability of the spliced ​​parts under the high pressure environment of injection molding in the existing technology of multi-module splicing and locking tooling for injection mold base, this utility model aims to provide a multi-module splicing and locking tooling for injection mold base with improved structure that can effectively solve the above problems.

[0006] This utility model provides a multi-module splicing and locking fixture for injection mold base, including: a base, a positioning component, a locking component, and a guide post vertically fixed to the top of the base; a fixed mold that is slidably sleeved on the outer periphery of the guide post and can slide back and forth along its length direction, a moving mold located above the fixed mold, and a cavity installed inside the moving mold.

[0007] The positioning component has a guide block fixed to the outer wall of the guide post and providing axial positioning. The inner wall of the fixed mold is provided with a guide groove that slides with the guide block. The bottom of the fixed mold is integrally formed with a downwardly extending locking block. The top of the base is provided with a locking groove for the locking block to be inserted vertically. The top of the cavity is provided with an upwardly extending mounting block. The inner wall of the moving mold is provided with a mounting groove that matches the mounting block.

[0008] Furthermore, the locking assembly includes a first mounting screw rotatably connected inside the fixed mold and passing through the fixed mold. The top of the base is provided with a first mounting hole that forms a threaded engagement with the first mounting screw. The locking assembly also includes a second mounting screw rotatably connected inside the side wall of the moving mold. The cavity is provided with a second mounting hole that forms a threaded engagement with the second mounting screw. The base, the guide post, the fixed mold, the moving mold, and the cavity are combined through multiple nested positioning of the positioning assembly and the spiral fastening connection of the locking assembly.

[0009] Preferably, the guide groove formed on the inner wall of the fixed mold extends downward from the top along the axial direction of the guide post, and the guide block is completely located within the width range of the guide groove, thereby providing precise radial limiting and preventing the fixed mold from rotating when it moves up and down along the guide post.

[0010] Preferably, the groove on the top of the base is parallel to the central axis of the guide post in the depth direction. After the bottom surface of the card block is inserted, it is in close contact with the bottom of the groove. The side wall of the card block and the inner wall of the groove achieve secondary precision alignment of the fixed mold on the base through close physical contact.

[0011] Preferably, the moving mold has an installation groove on the side facing the base. After the installation block enters the installation groove, it is in an interference fit state. The installation block achieves self-locking pre-positioning of the cavity before final locking through the squeezing friction between it and the installation groove, effectively avoiding the shaking of the cavity due to gravity during assembly.

[0012] Preferably, the head of the first mounting screw in the locking assembly is recessed into the top surface of the fixed mold, and the head of the second mounting screw is confined to the outer wall surface of the moving mold and does not protrude from the assembly plane. This countersunk or limiting structure ensures that the locking structure does not interfere with the mold closing action between the moving mold and the fixed mold.

[0013] Preferably, four guide pillars are symmetrically arranged on the edge of the base, and the outer wall of each guide pillar is integrally fixed with the guide block. The four-point balanced guidance method greatly improves the stability of the center of gravity and the smoothness of vertical movement of the fixed mold during the assembly process.

[0014] Preferably, the locking block at the bottom of the fixed mold and the fixed mold are integrally injection molded from high-strength steel, and the mounting block and the cavity are integrally fixedly connected, ensuring that the positioning structure has sufficient fatigue strength and structural stability when subjected to alternating injection stress.

[0015] Preferably, the radial distance between the first mounting hole and the guide post on the top of the base is greater than the radial distance between the slot and the guide post. This lever arm extension layout allows the locking force generated by the first mounting screw to be more evenly distributed on the bottom edge of the fixed mold.

[0016] Preferably, the central axis of the second mounting screw is perpendicular to the feed path of the cavity in the mounting groove. The end of the second mounting screw is firmly inserted into the second mounting hole by the lateral helical pushing force, thereby achieving a double rigid lock of the cavity relative to the moving mold in both the axial and radial directions.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problems of difficult manual alignment and low positioning accuracy during mold installation in the prior art by setting a guide block on the outer wall of the guide post and slidingly engaging with the guide groove of the fixed mold, and combining the vertical embedding structure of the bottom card block of the fixed mold and the base card groove. It achieves the technical effect of realizing fast and accurate positioning of the fixed mold and effectively preventing radial offset during installation.

[0019] 2. This utility model solves the problem in the prior art that the cavity is prone to loosening and displacement before final locking, and is not convenient for single-person operation and installation, by setting an installation block at the top of the cavity and forming an interference fit with the installation groove on the inner wall of the moving mold. It achieves the technical effect of pre-positioning and self-locking of the cavity by relying on the frictional force of the fit, and improving the convenience of module assembly.

[0020] 3. This utility model solves the problem that spliced ​​mold frames are prone to slight drift under high-pressure injection molding, resulting in unstable dimensional accuracy of molded products, by having the first and second mounting screws pass through the module and form a spiral lock with the mounting holes. This achieves the technical effect of greatly enhancing the structural rigidity of the spliced ​​modules and ensuring stable and reliable production operation. Attached Figure Description

[0021] Figure 1 This is a perspective view of a multi-module splicing and locking fixture for an injection mold frame proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the guide post of a multi-module splicing and locking fixture for injection mold frame proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the fixed mold of a multi-module splicing and locking tooling for injection mold frame proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the cavity of a multi-module splicing and locking tooling for injection mold frame proposed in this utility model.

[0025] Legend:

[0026] 1. Base; 2. Positioning component; 201. Guide block; 202. Guide groove; 203. Locking block; 204. Locking slot; 205. Mounting block; 206. Mounting groove; 3. Locking component; 301. First mounting screw; 302. First mounting hole; 303. Second mounting screw; 304. Second mounting hole; 4. Guide post; 5. Fixed mold; 6. Moving mold; 7. Cavity. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please refer to Figures 1 to 4 This utility model provides a multi-module splicing and locking fixture for injection mold frames, which aims to solve the problems of low positioning accuracy, cumbersome disassembly and assembly steps, and insufficient locking stability after module splicing in the prior art when changing the fixed mold 5 and the cavity 7.

[0029] This injection mold base multi-module splicing and locking fixture includes a base 1 and guide pillars 4 vertically fixed to the top of the base 1. The base 1 serves as the basic installation platform for the entire fixture and provides a horizontal support surface. The guide pillars 4 provide a precise vertical reference for the subsequent installation and sliding of the mold modules. The injection mold base multi-module splicing and locking fixture also includes a positioning component 2 and a locking component 3. The positioning component 2 determines the initial spatial coordinates of each module during the splicing process, and the locking component 3 completes the final rigid fixation between the modules. The fixed mold 5 is slidably sleeved on the outer periphery of the guide pillars 4 and can slide back and forth along the length of the guide pillars 4. The moving mold 6 is located above the fixed mold 5 and serves as the carrier on the moving side of the injection molding machine. The cavity 7 is installed inside the moving mold 6 to form the injection molding space. These components together constitute an organic whole with quick assembly and disassembly capabilities. The base 1 has four symmetrically distributed guide posts 4 at the edge. Each guide post 4 has a guide block 201 fixed on its outer wall. The inner wall of the fixed mold 5 has a corresponding guide groove 202 for accommodating the guide block 201 and slidingly engaging with it. This structure ensures the axial stability of the fixed mold 5 during vertical displacement and eliminates radial deflection through the physical limiting of the guide block 201 and the guide groove 202. The bottom of the fixed mold 5 has a downwardly protruding locking block 203. The top of the base 1 has a locking groove 204 for the locking block 203 to be inserted vertically and whose depth direction is parallel to the axial direction of the guide post 4. As the fixed mold 5 slides down the guide post 4 to the bottom, the locking block 203 is finally completely embedded in the locking groove 204, making the bottom of the fixed mold 5 and the top of the base 1 fit tightly together, thus forming a secondary locking in the horizontal plane.

[0030] The positioning component 2 has a guide block 201 fixed to the outer wall surface of the guide post 4. The guide block 201 has a lateral guide surface extending parallel to the axis of the guide post 4. A guide groove 202 is correspondingly formed on the inner wall of the fixed mold 5 to accommodate the guide block 201 and has a matching shape and size. The guide groove 202 extends along the axial direction of the guide post 4 and extends vertically from the top opening of the fixed mold 5 to the middle position of the fixed mold 5. The positioning component 2 is arranged on the sliding contact interface between the fixed mold 5 and the guide post 4, and is completely confined within the width range of the guide groove 202 by the guide block 201, forming... The vertical sliding fit enables rotational limiting and radial guidance of the fixed mold 5 during assembly. At the same time, a downwardly extending locking block 203 is correspondingly provided on the bottom end face of the fixed mold 5, and a corresponding slot 204 is provided on the top end face of the base 1 to receive the insertion of the locking block 203. In the assembled state, the locking block 203 of the fixed mold 5 is vertically inserted into the slot 204 of the base 1, and the side wall of the locking block 203 and the inner wall of the slot 204 form an interference fit. The nested positioning structure of the boss and the groove ensures that a rigid constraint is formed between the fixed mold 5 and the base 1 in the horizontal plane.

[0031] In the combined structure of the moving mold 6 and the cavity 7, the top of the cavity 7 is fixed with an upwardly extending mounting block 205. The inner wall of the moving mold 6 near the base 1 is provided with a mounting groove 206 for the mounting block 205 to be inserted. The mounting block 205 is in an interference fit state in the mounting groove 206 to ensure the frictional self-locking force after pre-positioning. The mounting block 205 of the cavity 7 is slidably fitted in the mounting groove 206 of the moving mold 6, and the axial direction of the mounting groove 206 is parallel to the axial direction of the guide post 4. This block-groove nested fit structure defines the spatial position of the cavity 7 relative to the moving mold 6. The operator can use this structure to complete the pre-alignment of the mold cavity 7.

[0032] Based on the above embodiments, the present invention also includes the following preferred technical solutions:

[0033] In a preferred embodiment, four guide posts 4 are symmetrically fixed at the edge of the base 1. Each guide post 4 has a guide block 201 from the positioning assembly 2 fixed on its outer wall. The guide groove 202 opened on the inner wall of the fixed mold 5 extends along the axial direction of the guide post 4. The guide block 201 is completely located within the width of the guide groove 202, and the guide block 201 and the guide groove 202 form an axial sliding fit, thereby improving the uniformity of force and vertical guiding accuracy during the lifting process of the fixed mold 5.

[0034] In another preferred embodiment, the depth direction of the slot 204 of the positioning component 2 is parallel to the axial direction of the guide post 4. The integrated injection-molded block 203 at the bottom of the fixed mold 5 is vertically inserted into the slot 204. The bottom surface of the block 203 is in close contact with the bottom of the slot 204, and the side wall of the block 203 is in interference fit with the inner wall of the slot 204. The bottom end face of the fixed mold 5 is in close contact with the top end face of the base 1, thereby achieving rapid and accurate vertical alignment of the fixed mold 5 on the base 1.

[0035] In another preferred embodiment, the mounting groove 206 of the positioning component 2 is opened on the side of the moving mold 6 facing the base 1, and the mounting block 205, which is integrally fixed at the top of the cavity 7, is in an interference fit state in the mounting groove 206. The friction generated therefrom helps the cavity 7 maintain a predetermined spatial position before being finally fixed by the locking component 3.

[0036] In another preferred embodiment, the head of the first mounting screw 301 of the locking assembly 3 is recessed into the top surface of the fixed mold 5 and extends into the first mounting hole 302. The head of the second mounting screw 303 is confined to the outer wall of the moving mold 6 and extends into the second mounting hole 304 inside the cavity 7. The radial distance of the first mounting hole 302 relative to the guide post 4 is greater than the radial distance of the slot 204 relative to the guide post 4, so that the locking force is biased to the outer side of the locking structure. The central axis of the second mounting screw 303 is perpendicular to the feed path of the cavity 7 in the mounting groove 206. By rotating the second mounting screw 303, it forms a mechanical lock in the second mounting hole 304. Both the first mounting screw 301 and the second mounting screw 303 are made of high-strength alloy steel to cope with the pressure impact during the injection molding process.

[0037] The working principle of this utility model's multi-module splicing and locking fixture for injection mold frames is as follows:

[0038] When it is necessary to replace the fixed mold 5 and cavity 7 on the top of the base 1, firstly, the fixing constraint on both is released by rotating the locking assembly 3. Specifically, the first mounting screw 301 and the second mounting screw 303 are unscrewed counterclockwise. Then, the fixed mold 5 and cavity 7 are disassembled by cooperating with the positioning assembly 2. The fixed mold 5 is slid upward along the outer wall of the guide post 4 to detach it from the surface of the base 1. At this time, the locking block 203 fixed at the bottom of the fixed mold 5 is released from the inner wall of the locking groove 204 on the top of the base 1. At the same time, the cavity 7 is pulled downward from the inside of the moving mold 6, so that the mounting block 205 on the top of the cavity 7 is separated from the mounting groove 206 on the side wall of the moving mold 6, thereby realizing the quick disassembly and replacement of the fixed mold 5 and cavity 7.

[0039] During the reinstallation of the fixed mold 5, the operator slides the fixed mold 5 onto the outer wall of the guide post 4 and moves it downwards vertically. Since the guide block 201 fixed to the outer wall of the guide post 4 is inserted into the guide groove 202 on the inner wall of the fixed mold 5 and forms a sliding fit, the downward path of the fixed mold 5 is precisely restricted. The fixed mold 5 is pressed down further so that the locking block 203 fixed to the bottom of the fixed mold 5 is inserted into the inner wall of the locking groove 204 at the top of the base 1. The interference fit between the locking block 203 and the locking groove 204 forms a preliminary positioning. Then, when installing the cavity 7, the mounting block 205 fixed to the top of the cavity 7 is inserted vertically upwards into the corresponding mounting groove 206 on the inner wall of the moving mold 6. Since the mounting block 205 is in an interference fit state in the mounting groove 206, the cavity 7 can still be stably maintained in the preset position of the moving mold 6 under the action of gravity without displacement.

[0040] When finally locking and fixing the fixed mold 5 and the cavity 7, the first mounting screw 301 is rotated clockwise to rotate inside the fixed mold 5 and extend downward. After passing through the fixed mold 5, the first mounting screw 301 is screwed into the first mounting hole 302 at the top of the base 1, thereby fastening the fixed mold 5 to the horizontal support surface of the base 1. Subsequently, when fixing the cavity 7, the second mounting screw 303 is rotated clockwise to rotate inside the side wall of the moving mold 6 and extend horizontally. After passing through the moving mold 6, the second mounting screw 303 is screwed into the second mounting hole 302 inside the cavity 7. Inside the hole 304, rigid locking between the cavity 7 and the moving mold 6 is achieved. This utility model solves the technical defects of low positioning accuracy and insufficient connection reliability under high pressure environment in the prior art when injection mold frames are spliced ​​in multiple modules. The first guidance formed by the guide block 201 and the guide groove 202, the second alignment formed by the locking block 203 and the locking groove 204, and the third pre-positioning formed by the mounting block 205 and the mounting groove 206, combined with the spiral fastening force of the first mounting screw 301 and the second mounting screw 303, are achieved.

[0041] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-module splicing and locking tool for injection mold frame, comprising a base (1), a positioning assembly (2), a locking assembly (3), and a guide column (4) vertically fixed on the top of the base (1), characterized in that, It also includes a fixed mold (5) that is slidably sleeved on the outer periphery of the guide post (4) and can slide back and forth along its length direction, a moving mold (6) located above the fixed mold (5), and a cavity (7) installed inside the moving mold (6); The positioning component (2) includes a guide block (201) fixed to the outer wall of the guide post (4), a guide groove (202) opened on the inner wall of the fixed mold (5) and slidingly engaged with the guide block (201), a locking block (203) fixed to the bottom of the fixed mold (5), a locking slot (204) opened on the top of the base (1) and for the locking block (203) to be inserted vertically, a mounting block (205) fixed to the top of the cavity (7), and a mounting groove (206) opened on the inner wall of the moving mold (6) and for the mounting block (205) to be inserted. The locking assembly (3) includes a first mounting screw (301) rotatably connected to the inside of the fixed mold (5), a first mounting hole (302) opened on the top of the base (1) and threadedly engaged with the first mounting screw (301), a second mounting screw (303) rotatably connected to the inside of the moving mold (6), and a second mounting hole (304) opened inside the cavity (7) and threadedly engaged with the second mounting screw (303).

2. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The guide groove (202) extends along the axial direction of the guide post (4), and the guide block (201) is completely located within the width range of the guide groove (202).

3. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The depth direction of the slot (204) is parallel to the axial direction of the guide post (4), and the bottom surface of the card block (203) is in close contact with the bottom of the slot (204).

4. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The mounting groove (206) is opened on the side of the moving mold (6) facing the base (1), and the mounting block (205) is in an interference fit state in the mounting groove (206).

5. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The first mounting screw (301) penetrates the fixed mold (5) and extends into the first mounting hole (302), and the second mounting screw (303) penetrates the side wall of the moving mold (6) and extends into the second mounting hole (304). The head of the first mounting screw (301) is recessed into the top surface of the fixed mold (5), and the head of the second mounting screw (303) is limited to the outer wall surface of the moving mold (6).

6. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, There are four guide posts (4), and the four guide posts (4) are symmetrically fixed to the edge of the base (1). Each guide post (4) has a guide block (201) on its outer wall.

7. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The card block (203) and the fixed mold (5) are an integrated injection molding structure, and the mounting block (205) and the cavity (7) are an integrated fixed connection structure.

8. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The radial distance of the first mounting hole (302) relative to the guide post (4) is greater than the radial distance of the slot (204) relative to the guide post (4).

9. The multi-module splicing and locking tool for the injection mold frame according to claim 1, characterized in that, The central axis of the second mounting screw (303) is perpendicular to the feed path of the cavity (7) in the mounting groove (206).

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