A two-stage core-pulling injection mold

Abstract

This invention discloses a secondary core-pulling injection mold, belonging to the field of injection mold technology, aiming to solve the problem of difficult demolding of complex structure products by single core pulling. The mold includes a base, a hydraulic cylinder, a cylinder seat, a slider seat, a slider core, a stop block, a slider pressure block, a guide block, insert one, insert two, a T-shaped lever, a pull block, and a spring. The hydraulic cylinder is located on one side of the base and connected to the slider seat. The slider seat has a slider core and a groove on its side that mates with the stop block. The slider pressure block is equipped with the guide block, insert one, and insert two. During operation, the hydraulic cylinder retracts, first displacing the slider seat and slider core. The groove and the stop block then push the slider downwards. After the slider seat reaches its maximum stroke, the stop block releases its restraint, and the slider seat, along with the slider pressure block and related components, moves synchronously, achieving secondary core pulling. It can adapt to complex products, providing precise and efficient core pulling, thus improving production quality and efficiency.

Description

Technical Field

[0001] This application relates to the technical field of molds, and in particular to a secondary core-pulling injection mold. Background Technology

[0002] In the field of injection molding, for injection molded products with complex structures (especially those with deep cavities, undercuts, or complex parting surfaces), the core-pulling mechanism is a key component to ensure smooth demolding. Traditional core-pulling molds mostly use a single core-pulling action, that is, the separation of the product from the mold cavity is completed in one core-pulling motion.

[0003] However, with the diversification and complexity of industrial product design, many products require special internal or external structures, and single-stage core pulling is no longer sufficient to meet demolding requirements. For example, some products have complex structures such as stepped undercuts, deep cavity inner protrusions, or multi-directional interlacing. If the traditional single-stage core pulling method is used, it is easy to cause uneven stress on the product during the core pulling process, resulting in deformation, tearing, or even damage. At the same time, the mold itself may also experience component wear or jamming due to forced core pulling, which seriously affects product quality and mold life.

[0004] To address this issue, the industry has gradually developed secondary or multiple core-pulling technologies. These technologies achieve smooth demolding of complex products by performing core-pulling actions in different directions or positions in stages. However, existing secondary core-pulling molds often suffer from complex structures, low transmission efficiency, and poor coordination of core-pulling actions. Some molds rely on multiple power sources, which not only increases mold manufacturing costs and control difficulty but may also lead to decreased core-pulling accuracy due to insufficient synchronization of multiple power sources, making it difficult to meet the production requirements of high-precision injection molded products. Therefore, to solve the above problems, this application provides a secondary core-pulling injection mold. Utility Model Content

[0005] To address the aforementioned problems, this application provides a secondary core-pulling injection mold.

[0006] This application provides a secondary core-pulling injection mold, characterized in that it includes a base, a hydraulic cylinder is provided on one side of the base, the hydraulic cylinder is connected to a hydraulic cylinder seat, the output end of the hydraulic cylinder is connected to a slider seat, and a slider seat is provided with a slider core; a stop block is provided on the base, a sliding groove that cooperates with the stop block is opened on the side of the slider seat, a slider pressing block that can move relative to it is provided on the slider seat, and a guide block, an insert one and an insert two are fixed on the slider pressing block.

[0007] By setting a hydraulic cylinder on one side of the base, when the hydraulic cylinder retracts, it first moves the slider seat and the slider core together. During the movement of the slider seat, the interaction between the sliding groove and the stop on its side pushes the slider downward. When the slider seat slides to its maximum stroke, the stop loses its restriction on the slider pressure block on the base. Subsequently, the slider seat carries the slider pressure block to move synchronously. The guide block fixed on the slider pressure block, insert one and insert two then move synchronously, thereby realizing the overall displacement and completing the secondary core pulling operation of the mold.

[0008] Preferably, the slider seat is provided with a T-shaped lever, which is used to cooperate with other parts of the mold to assist in the precise control of the core pulling action.

[0009] Preferably, the base is provided with a spring, which is used to assist the relevant components in resetting after the core-pulling action is completed.

[0010] Preferably, it also includes a pull block, which cooperates with other structures of the mold to assist in the connection or movement of components during the core-pulling process.

[0011] Preferably, insert one and insert two are fixed to the slider pressure block by a specific mounting structure to ensure synchronous displacement during the core pulling process.

[0012] Preferably, when the hydraulic cylinder retracts, it drives the slider seat and the slider core to move. When the slider seat moves, its side groove interacts with the stop block to push the slider downward. When the slider seat slides to the maximum stroke, the stop block loses its restriction on the slider pressing block. Subsequently, the slider seat carries the slider pressing block to move synchronously. The guide block, insert one and insert two fixed on the slider pressing block move synchronously to realize the secondary core pulling operation.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] It can achieve precise secondary core pulling action. Through the coordinated action of components such as hydraulic cylinder drive, slider seat, stop, and slider pressure block, it can complete the core pulling operation of injection molded products with complex structure. It solves the problem that traditional molds are difficult to perform one-time core pulling for products with complex cavity or deep cavity structure, and greatly expands the applicability of the mold.

[0015] The core-pulling process is stable, reliable, and highly efficient. Through the cooperation of the slider seat groove and the stop block, as well as the action of related auxiliary components, the movement trajectory and timing of each component are precisely controllable, avoiding core-pulling jams or product damage. At the same time, the hydraulic cylinder is used as a power source to achieve automated core-pulling, reducing manual intervention and improving the overall efficiency of injection molding production. Attached Figure Description

[0016] Figure 1 It is the isometric drawing in Embodiment 1 of this application;

[0017] Figure 2 This is an exploded view of Embodiment 1 of this application;

[0018] Figure 3 This is a top view of Embodiment 1 of this application.

[0019] Explanation of reference numerals in the attached diagram: 1. Hydraulic cylinder; 2. Hydraulic cylinder seat; 3. Slider pressure block; 4. Stop block; 5. Slider seat; 6. T-shaped lever block; 7. Sliding core; 8. Pull block; 9. Insert one; 10. Guide block; 11. Insert two; 12. Spring; 13. Base. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 - Figure 3 This application will be described in further detail.

[0021] Example 1:

[0022] A secondary core-pulling injection mold, as shown in the reference Figure 1 - Figure 3 A secondary core-pulling injection mold includes a base 13. A hydraulic cylinder 1 is fixedly installed on one side of the base 13. The hydraulic cylinder 1 is securely mounted on the base 13 via a hydraulic cylinder seat 2. The output end of the hydraulic cylinder 1 is connected to a slider seat 5, which can drive the slider seat 5 to perform linear motion. A sliding core 7 is installed on the slider seat 5, and the sliding core 7 moves synchronously with the slider seat 5.

[0023] A stop block 4 is fixedly installed on the base 13. A sliding groove is provided on the side of the slider seat 5. The sliding groove cooperates with the stop block 4. During the movement of the slider seat 5, the stop block 4 can slide in the sliding groove and interact with the groove wall. A slider pressing block 3 is provided on the slider seat 5. The slider pressing block 3 can move relative to the slider seat 5 to a certain extent.

[0024] Guide block 10, insert 9 and insert 11 are fixedly installed on slider block 3. Guide block 10 plays a guiding role to ensure the accuracy of core pulling process. Insert 9 and insert 11 are used to contact the injection molded product to realize core pulling of specific structures of the product.

[0025] The slider seat 5 is also equipped with a T-shaped lever 6. The T-shaped lever 6 works in conjunction with other related components of the mold to help control the rhythm and precision of the core pulling action, ensuring that the core pulling process is carried out according to the preset trajectory.

[0026] A spring 12 is installed on the base 13. One end of the spring 12 is connected to the base 13, and the other end is connected to the relevant moving parts. After the core pulling action is completed, the spring 12 can provide a restoring force to assist the relevant parts in resetting and preparing for the next injection molding operation.

[0027] The mold also includes a pull block 8, which works in conjunction with other structures of the mold to assist in the connection or movement between components during the core pulling process, thereby enhancing the overall coordination of the mold's movement.

[0028] The working process of this embodiment is as follows:

[0029] When core extraction is required, hydraulic cylinder 1 begins to retract, and its output end drives the slider seat 5 and the slider 7 to move together. During the movement of slider seat 5, the sliding groove on its side interacts with the stop block 4, and the stop block 4 generates a pushing force on the sliding groove wall, thereby pushing the slider downward.

[0030] When the slider seat 5 slides to its maximum stroke, the stop block 4 disengages from the groove on the slider seat 5, and at this time the stop block 4 loses its restriction on the slider pressure block 3. Subsequently, the slider seat 5 drives the slider pressure block 3 to move synchronously, and the guide block 10, insert 9 and insert 11 fixed on the slider pressure block 3 also move synchronously, thereby realizing the secondary core pulling operation of the mold.

[0031] After the core-pulling operation is completed, each component gradually resets under the action of spring 12, waiting for the next operation cycle.

[0032] The foregoing description of an exemplary embodiment of a secondary core-pulling injection mold provided by this disclosure refers to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A secondary core-pulling injection mold, characterized in that, Includes a base (13), on one side of which is a hydraulic cylinder (1), which is connected to a hydraulic cylinder seat (2), and the output end of the hydraulic cylinder (1) is connected to a slider seat (5), on which a sliding core (7) is provided; a stop block (4) is provided on the base (13), and a sliding groove that cooperates with the stop block (4) is opened on the side of the slider seat (5), and a slider pressing block (3) that can move relative to it is provided on the slider seat (5), and a guide block (10), an insert one (9) and an insert two (11) are fixed on the slider pressing block (3).

2. The secondary core-pulling injection mold according to claim 1, characterized in that: The slider seat (5) is provided with a T-shaped lever (6), which is used to cooperate with other parts of the mold to assist in the precise control of the core pulling action.

3. The secondary core-pulling injection mold according to claim 1, characterized in that: A spring (12) is provided on the base (13), and the spring (12) is used to assist the relevant components in resetting after the core pulling action is completed.

4. The secondary core-pulling injection mold according to claim 1, characterized in that: It also includes a pull block (8), which cooperates with other structures of the mold to assist in the connection or movement of components during the core pulling process.

5. The secondary core-pulling injection mold according to claim 1, characterized in that: The insert one (9) and insert two (11) are fixed on the slider block (3) by a specific mounting structure to ensure synchronous displacement during the core pulling process.

6. The secondary core-pulling injection mold according to claim 1, characterized in that: When the cylinder (1) contracts, it drives the slider seat (5) and the slide core (7) to move. When the slider seat (5) moves, its side groove interacts with the stop block (4) to push the slider downward. When the slider seat (5) slides to the maximum stroke, the stop block (4) loses its restriction on the slider pressure block (3). Then the slider seat (5) carries the slider pressure block (3) to move synchronously. The guide block (10), insert one (9) and insert two (11) fixed on the slider pressure block (3) move synchronously to realize the secondary core pulling operation.

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