Positioning device for forming an injection-molded shell

Abstract

This utility model relates to the technical field of injection molding equipment and discloses a positioning device for injection molding shells. It includes a carrier, a lower mold fixedly connected to the top of the carrier, and fixing blocks fixedly connected to the front and rear sides of the lower mold. Each fixing block has a through groove and a limit groove, with a limit block slidably connected inside the limit groove. A spring is fixedly connected to the right side of the limit block, and a connecting block is fixedly connected to the right side of the spring. Cylinders are fixedly connected to the front and rear sides of the lower mold, and multiple positioning holes are formed inside the lower mold. This utility model achieves initial positioning through the cooperation of positioning pins and positioning holes. Combined with the linkage and engagement structure of the connecting block, limit block, and spring, a dual positioning mechanism is formed, effectively avoiding single positioning failure and ensuring the stability and reliability of positioning during injection molding.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to a positioning device for injection molding shells. Background Technology

[0002] Positioning devices for injection molding shells are used in injection molding production to ensure the precise positioning of mold components or workpieces. They restrict the degree of freedom of movement through mechanical structures or sensors to ensure the dimensional accuracy and quality stability of the injection molded shells.

[0003] The positioning device for injection molding shells uses mechanical structures such as positioning pins and guide rails to cooperate with the mold reference surface, limiting the displacement of the workpiece or mold components during the injection molding process. With the help of sensors, the position deviation is monitored in real time and fed back to the control device, triggering the drive mechanism to make fine adjustments. Finally, the relative positions of each component are kept fixed during mold closing, injection molding and other stages, ensuring molding accuracy.

[0004] In existing technologies, traditional positioning methods mostly rely on manual operation and simple mechanical structures, such as using bolts, nuts, and other connectors to fix the mold to the injection molding machine's worktable. In actual operation, this method requires workers to spend a lot of time and effort aligning the mold's mounting holes with the threaded holes on the worktable. The operation process is cumbersome and time-consuming, seriously affecting production efficiency. The accuracy of manual operation is difficult to guarantee. Even if the mold position seems accurate during installation, during the injection process, due to the high pressure impact generated when the plastic material is injected and the vibration of the mold itself during operation, the bolts and other connectors are prone to loosening, causing the mold to gradually shift and misalign. The dimensional accuracy, shape accuracy, and surface quality of the injection molded shell will be seriously affected, resulting in a significant increase in the product defect rate. Therefore, a positioning device for injection molded shell molding is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a positioning device for injection molding shells, which aims to improve the problem of gradual displacement and misalignment of the mold in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A positioning device for injection molding shells includes a carrier, a lower mold fixedly connected to the top of the carrier, fixing blocks fixedly connected to the front and rear sides of the lower mold, a through groove inside the fixing block, a limit groove inside the fixing block, a limit block slidably connected inside the limit groove, a spring fixedly connected to the right side of the limit block, a connecting block fixedly connected to the right side of the spring, cylinders fixedly connected to the front and rear sides of the lower mold, multiple positioning holes inside the lower mold, two connecting components fixedly connected to the top of the carrier, a carrier plate fixedly connected to the top of the connecting components, an upper mold fixedly connected to the bottom of the carrier plate, connecting blocks fixedly connected to the front and rear sides of the upper mold, multiple positioning posts fixedly connected to the bottom of the carrier plate, and a portable component for easy demolding inside the carrier plate. As a further description of the above technical solution: The portable component includes a connecting slot, an electric push rod is fixedly connected to the inner left side of the connecting slot, and an L-shaped block is fixedly connected to the drive end of the electric push rod. As a further description of the above technical solution: The carrier plate has multiple reset slots inside, and a second spring is fixedly connected to the top inner wall of the reset slot, and a connecting post is fixedly connected to the bottom of the second spring. As a further description of the above technical solution: The connecting assembly includes fixed posts, the bottoms of two fixed posts are respectively fixedly connected to the top of the carrier, and connecting posts are slidably connected inside the fixed posts, the tops of the two connecting posts are respectively fixedly connected to the bottom of the carrier plate; As a further description of the above technical solution: The right sides of the two connecting blocks are respectively fixedly connected to the driving ends of the two cylinders, and the outer side of the positioning post is in contact with the inner wall of the positioning hole. As a further description of the above technical solution: The connecting block is externally slidably connected to the inside of the through groove, and the inner wall of the connecting block is in contact with the outer side of the limiting block; As a further description of the above technical solution: The outer side of the L-block is in contact with the inner wall of the upper mold, and the outer side of the connecting column is slidably connected to the inside of the reset groove; As a further description of the above technical solution: The bottoms of the multiple connecting columns are respectively fixedly connected to the top of the upper mold, and the outside of the connecting groove is opened inside the carrier plate.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the upper mold is moved downward by driving the carrier plate, and then the positioning pin is accurately inserted into the positioning hole of the lower mold to achieve initial positioning. At the same time, the connecting blocks on both sides of the upper mold slide into the through groove of the fixed block. When the connecting block presses down on the limiting block, the spring is compressed and contracted. After the connecting block is in place, the elastic force of the spring pushes the limiting block into the groove of the inner wall of the connecting block. At the same time, the cylinder maintains the initial state and locks the connecting block. Thus, the initial positioning is achieved by the cooperation of the positioning pin and the positioning hole. The linkage and locking structure of the connecting block, the limiting block and the spring forms a dual positioning mechanism, which effectively avoids the failure of single positioning and ensures the stability and reliability of positioning during the injection molding process.

[0008] 2. In this utility model, by activating the electric push rod, the L block is driven to slide laterally in the connecting groove. Then, the wedge-shaped end face of the L block presses against the inner wall of the upper mold. The electric push rod drives the L block to slide into the corresponding wedge-shaped groove inside the upper mold. At the same time, the spring in the reset groove pushes the upper mold upward through the connecting column. This realizes the rapid separation of the injection molded shell by driving the L block to press against the inner wall of the upper mold through the electric push rod. Combined with the wedge-shaped groove positioning design, the demolding process is ensured to be efficient and convenient. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a positioning device for injection molding of a shell proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the fixing block of a positioning device for injection molding of a shell proposed in this utility model; Figure 3 This is a schematic diagram of the carrier plate of a positioning device for injection molding of a shell proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0010] Legend: 1. Carrier; 2. Lower mold; 3. Fixing block; 4. Through groove; 5. Limiting groove; 6. Limiting block; 7. Spring 1; 8. Connecting block; 9. Cylinder; 10. Positioning hole; 11. Fixing post; 12. Connecting post; 13. Carrier plate; 14. Connecting block; 15. Positioning post; 16. Upper mold; 17. Connecting groove; 18. Electric push rod; 19. L-block; 20. Reset groove; 21. Spring 2; 22. Connecting post. Detailed Implementation

[0011] 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.

[0012] Reference Figures 1 to 3 The present invention provides an embodiment of a positioning device for injection molding shells, comprising a carrier 1, which provides installation space and support for the upper lower mold 2. The lower mold 2 is fixedly connected to the top of the carrier 1. The lower mold 2 provides fixing and support for the fixing block 3. Fixing blocks 3 are fixedly connected to the front and rear sides of the lower mold 2 respectively. The fixing block 3 provides space for opening a through groove 4. The through groove 4 is opened inside the fixing block 3. The through groove 4 is used to engage when its connecting block 14 slides down. The fixing block 3 has a limiting groove 5 inside. The limiting groove 5 provides limiting and guiding for the limiting block 6. The limiting block 6 is slidably connected inside the limiting groove 5. The limiting block 6 is used to cooperate with the connecting block 14 to complete the positioning of the lower mold 2 and the upper mold 16. A spring 7 is fixedly connected to the right side of the limiting block 6. The spring 7 has an elastic function and provides elastic support for the limiting block 6. When the connecting block 14 slides down, it can squeeze the limiting block 6, thereby allowing it to retract through the elastic action of the spring 7. This allows the limiting block 6 to be inserted into the interior of the connecting block 14 to complete the positioning and limiting. A connecting block 8 is fixedly connected to the right side of the spring 7. The connecting block 8 can receive the force from the cylinder 9 to slide, thereby allowing the limiting block 6 to retract through the spring 7, releasing the limiting of the connecting block 14. After molding, the limiting can be released. Cylinders 9 are fixedly connected to the front and rear sides of the lower mold 2 respectively. After the injection molded shell is completed, the connecting block 8 is pulled by the cylinder 9 to reset, thereby causing the limiting block 6 to release the limiting of the connecting block 14. The lower mold 2 has multiple positioning holes 10 inside. The positioning holes 10 are used to quickly position the upper mold 16 with the positioning pins 15 when the carrier plate 13 is lowered and shaped. The top of the carrier 1 is fixedly connected to two connecting components. The top of the connecting components is fixedly connected to the carrier plate 13. The carrier plate 13 provides fixation and support for the upper mold 16. The bottom of the carrier plate 13 is fixedly connected to the upper mold 16. The upper mold 16 is used to cooperate with the lower mold 2 to complete the quick positioning installation. The front and rear sides of the upper mold 16 are fixedly connected to connecting blocks 14 respectively. The connecting blocks 14 are used to enter the through groove 4 and engage with the limiting block 6 when the upper mold 16 slides down, thereby completing the positioning effect. The bottom of the carrier plate 13 is fixedly connected to multiple positioning pins 15. The positioning pins 15 can cooperate with the positioning holes 10 to complete the quick positioning function when the upper mold 16 slides down. They can work together with the connecting blocks 14 to play a dual positioning role and prevent damage to the single positioning device. The carrier plate 13 has a portable component for easy demolding inside.

[0013] Reference Figure 3 and Figure 4 The portable component includes a connecting groove 17, which provides fixation and support for the electric push rod 18. The electric push rod 18 is fixedly connected to the inner left side of the connecting groove 17. The electric push rod 18 is the power source for the portable component. An L-block 19 is fixedly connected to the drive end of the electric push rod 18. The L-block 19 can receive the force from the electric push rod 18 and slide to extrude the upper mold 16, so that it can be quickly demolded after shaping. After demolding, the L-block 19 moves in the opposite direction. When the L-block 19 moves to the upper mold 16... Inside the corresponding wedge-shaped groove, the carrier plate 13 has multiple reset grooves 20. The reset grooves 20 provide fixation and support for the second spring 21. The second spring 21 is fixedly connected to the top inner wall of the reset groove 20. The second spring 21 has an elastic function and provides elastic support for its connecting column 22. The bottom of the second spring 21 is fixedly connected to the connecting column 22. When the upper mold 16 is squeezed out by the L block 19, the upper mold 16 can be reset by the elasticity of the second spring 21. The connecting column 22 drives the upper mold 16 to reset.

[0014] Reference Figures 2 to 4The connecting assembly includes a fixed column 11, which provides a limiting and guiding function for the connecting column 12. The bottoms of the two fixed columns 11 are fixedly connected to the top of the carrier 1, and the carrier 1 provides a fixing and supporting function for the fixed columns 11. The connecting column 12 is slidably connected inside the fixed column 11. The connecting column 12 can provide a fixing and supporting function for the upper carrier plate 13. The tops of the two connecting columns 12 are fixedly connected to the bottom of the carrier plate 13. The connecting columns 12 can slide synchronously and adaptively when the carrier plate 13 slides down. The right sides of the two connecting blocks 8 are fixedly connected to the driving ends of the two cylinders 9. The connecting blocks 8 can receive the force from the cylinders 9 to slide, and can then drive the limiting block 6 to reset through the spring 7. The outer side of the positioning post 15 contacts the inner wall of the positioning hole 10. The positioning post 15 can engage with the positioning hole 10 to complete positioning when its carrier plate 13 slides down. The outer side of the connecting block 14 is slidably connected inside the through groove 4. The through groove 4 provides limiting and guiding functions for the connecting block 14. The inner wall of the connecting block 14 contacts the outer side of the limiting block 6. The connecting block 14 can engage with the limiting block 6 to complete positioning. The outer side of the L-block 19 contacts the inner wall of the upper mold 16. After demolding, the L-block 19 is subjected to electric current... The force of the push rod 18 causes it to slide, thereby being able to be inserted into the corresponding wedge-shaped groove inside the upper mold 16. The external part of the connecting post 22 is slidably connected to the inside of the reset groove 20. The reset groove 20 provides a limiting and guiding function for the connecting post 22. The bottoms of the multiple connecting posts 22 are respectively fixedly connected to the top of the upper mold 16. The upper mold 16 can receive the elastic reset from the second spring 21 through the connecting post 22 and then reset to complete the demolding. The external part of the connecting groove 17 is opened inside the carrier plate 13. The carrier plate 13 provides space for the connecting groove 17.

[0015] Working principle: During use, the upper mold 16 is moved downward by the drive plate 13, and then the positioning pin 15 is precisely inserted into the positioning hole 10 of the lower mold 2 to achieve initial positioning. At the same time, the connecting blocks 14 on both sides of the upper mold 16 slide into the through groove 4 of the fixing block 3. When the connecting block 14 presses down on the limiting block 6, the spring 7 is compressed and contracted. After the connecting block 14 is in place, the elastic force of the spring 7 pushes the limiting block 6 into the groove on the inner wall of the connecting block 14. At the same time, the cylinder 9 maintains the initial state and locks the connecting block 8. Through the dual positioning structure of the positioning pin 15 and the limiting block 6, the relative displacement of the upper and lower molds is limited, avoiding deviation caused by the failure of a single positioning.

[0016] During demolding, the electric push rod 18 drives the L-block 19 to slide laterally within the connecting groove 17. Then, the wedge-shaped end face of the L-block 19 presses against the inner wall of the upper mold 16, causing the molded injection shell to separate from the mold. After the injection shell is demolded, the electric push rod 18 drives the L-block 19 in the opposite direction to slide into the corresponding wedge-shaped groove inside the upper mold 16. At the same time, the spring 21 in the reset groove 20 pushes the upper mold 16 to reset through the connecting column 22, so that it resets along the fixed column 11 under the guidance of the connecting column 12. This achieves convenient demolding and ensures that the upper mold 16 is accurately positioned by the elastic reset of the spring 21, providing a basis for the next injection positioning.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning device for injection molding shells, comprising a carrier (1), characterized in that: The top of the carrier (1) is fixedly connected to a lower mold (2). The front and rear sides of the lower mold (2) are fixedly connected to fixed blocks (3). The interior of the fixed blocks (3) is provided with a through groove (4). The interior of the fixed blocks (3) is provided with a limit groove (5). The interior of the limit groove (5) is slidably connected to a limit block (6). The right side of the limit block (6) is fixedly connected to a spring (7). The right side of the spring (7) is fixedly connected to a connecting block (8). The front and rear sides of the lower mold (2) are fixedly connected to cylinders (9). The interior of the lower mold (2) is provided with multiple positioning holes (10). The top of the carrier (1) is fixedly connected to two connecting components. The top of the connecting components is fixedly connected to a carrier plate (13). The bottom of the carrier plate (13) is fixedly connected to an upper mold (16). The front and rear sides of the upper mold (16) are fixedly connected to connecting blocks (14). The bottom of the carrier plate (13) is fixedly connected to multiple positioning posts (15). The interior of the carrier plate (13) is provided with a portable component for easy demolding.

2. The positioning device for injection molding of a shell according to claim 1, characterized in that: The portable component includes a connecting groove (17), an electric push rod (18) is fixedly connected to the inner left side of the connecting groove (17), and an L block (19) is fixedly connected to the drive end of the electric push rod (18).

3. The positioning device for injection molding of a shell according to claim 2, characterized in that: The carrier plate (13) has multiple reset slots (20) inside. A spring (21) is fixedly connected to the top inner wall of the reset slot (20), and a connecting post (22) is fixedly connected to the bottom of the spring (21).

4. A positioning device for injection molding of a shell according to claim 1, characterized in that: The connecting assembly includes a fixing column (11), the bottom of the two fixing columns (11) are respectively fixedly connected to the top of the carrier (1), and a connecting column (12) is slidably connected inside the fixing column (11), the top of the two connecting columns (12) are respectively fixedly connected to the bottom of the carrier plate (13).

5. A positioning device for injection molding of a shell according to claim 1, characterized in that: The right sides of the two connecting blocks (8) are respectively fixedly connected to the driving ends of the two cylinders (9), and the outside of the positioning column (15) is in contact with the inner wall of the positioning hole (10).

6. A positioning device for injection molding of a shell according to claim 1, characterized in that: The outer side of the connecting block (14) is slidably connected to the inside of the through groove (4), and the inner wall of the connecting block (14) is in contact with the outer side of the limiting block (6).

7. A positioning device for injection molding of a shell according to claim 3, characterized in that: The exterior of the L block (19) is in contact with the inner wall of the reset groove (20), and the exterior of the connecting column (22) is slidably connected to the interior of the reset groove (20).

8. A positioning device for injection molding of a shell according to claim 3, characterized in that: The bottoms of the multiple connecting columns (22) are respectively fixedly connected to the top of the upper mold (16), and the outside of the connecting groove (17) is opened inside the carrier plate (13).

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