Double-link sliding block ejection structure

Abstract

The utility model relates to a kind of double-section sliding block ejection structure, belong to injection mould technical field, including slider I, the slider I front part upper end is equipped with product glue position, the slider I rear end is equipped with slider II, the slider I lower part is equipped with with slider I movable type insertion and inlay slider insert pin, the slider insert pin and slider II are equipped with spring, the spring and slider insert pin are equipped with sliding block, the slider I lower part is equipped with with sliding block movable type insertion and inlay wear plate.With the characteristics of precise linkage and good running stability.Through the cooperation of slider I and slider II, and the intervention of spring and slider insert pin, the stable and reliable ejection of injection molding products is achieved, avoiding the problems such as strain, deformation or white top caused by traditional ejection method.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a double-section slider ejection structure. Background Technology

[0002] In the field of injection molding, with the increasing complexity of product designs, structures such as deep ribs, internal undercuts, side snaps, and thin-walled, slender shapes are becoming more widely used. After cooling and solidification, these structures exert enormous clamping and sticking forces on the mold core (such as sliders and inserts). Traditional demolding methods, which involve the injection molding machine's ejection mechanism pushing the ejector plate and all ejector pins (or sliders) moving synchronously to eject the product, reveal the following fatal flaws when dealing with such complex products: Whitening and damage to the product: If the ejection force is concentrated on the weak or uneven parts of the product, the excessive local stress will cause the plastic to turn white (whitening), or even puncture or tear (damage to the product).

[0003] Product deformation and tearing: For deep ribs or undercut structures, a single forced ejection can cause the product to be stretched and deformed, or the surface to be scratched or torn along the demolding direction.

[0004] Incomplete demolding and inability to detach automatically: After one ejection, part of the product (such as an undercut) may still be stuck in the mold and cannot be completely removed from the cavity, requiring manual intervention, which seriously affects production automation and efficiency.

[0005] When automotive headlight components have mesh-like ribs or long, wrap-around ribs in their undercut structure, the slider may stick, affecting the product's size and shape. In such cases, spring pins are typically installed on the slider to assist in detaching the product during mold opening. However, in practice, some tunnel-type double-section sliders also experience this sticking issue. Because the tunnel structure is deeply embedded in the rear mold cavity, and the top and back of the double-section slider lack sufficient space for a front mold stop for the spring pin, a standard spring pin structure cannot be used. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing a double-section slider ejection structure, characterized by precise linkage and good operational stability. Through the cooperation of slider I and slider II, along with the intervention of springs and slider inserts, stable and reliable ejection of injection-molded products is achieved, avoiding problems such as tearing, deformation, or whitening that may occur with traditional ejection methods.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A double-section slider ejection structure includes a slider I, a product adhesive position at the upper front end of the slider I, a slider II at the rear end of the slider I, a slider pin that is movably inserted into the lower part of the slider I, a spring between the slider pin and the slider II, a sliding block between the spring and the slider pin, and a wear-resistant plate that is movably inserted into the lower part of the slider I.

[0008] Preferably, slider I is provided with inlet and outlet sprues, and slider I has a sliding water channel that communicates with slider II and the inlet and outlet sprues. This effectively cools the slider molding area, shortens the injection molding cycle, and prevents product shrinkage and deformation. It also reduces the mold operating temperature and extends the mold life.

[0009] Preferably, a spring pressure block is provided between the spring and slider II. This facilitates the positioning of the spring and the adjustment of the preload, and prevents the spring end from directly contacting or abrading the surface of slider II.

[0010] Preferably, the slider I is provided with pressure plates at both ends to limit its left and right movement. This restricts the slider I to slide only in a predetermined direction (usually the mold opening direction), preventing it from wobbling or deviating. This ensures the smoothness of the slider's movement and the repeatability of its positioning, thereby guaranteeing product quality.

[0011] Preferably, a T-shaped guide block is provided between slider I and slider II, which slides and inserts into slider I. The T-shaped guide block ensures that the movement of slider II can be accurately transmitted to slider I, while allowing relative sliding between the two in a specific direction.

[0012] This invention can achieve the following effects: This invention provides a double-section slider ejection structure, which, compared with existing technologies, features precise linkage and structural stability. Through the cooperation of slider I and slider II, and the intervention of springs and slider inserts, stable and reliable ejection of injection-molded products is achieved, avoiding problems such as tearing, deformation, or whitening that may occur with traditional ejection methods. The double-section slider design separates the "core pulling" and "ejection" actions in time and space, allowing the slider body to safely detach from the product first, and then utilizing the energy stored in the spring for a secondary ejection. Attached Figure Description

[0013] Figure 1 This is a top view of the structure of this utility model.

[0014] Figure 2 This is a side view of the structure of this utility model.

[0015] Figure 3 This is a cross-sectional view of the AA structure in the mold-opening state of this utility model.

[0016] Figure 4 This is a cross-sectional view of the AA structure of this utility model when the mold is just closed.

[0017] Figure 5 This is a cross-sectional view of the AA structure in the fully molded state of this utility model.

[0018] In the diagram: 1. Product adhesive position; 2. Slider I; 3. Pressure plate; 4. T-shaped guide block; 5. Slider II; 6. Inlet / outlet; 7. Wear-resistant plate; 8. Slider water channel; 9. Spring; 10. Spring pressure block; 11. Sliding block; 12. Slider insert pin. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example: Figure 1-5 As shown, a double-section slider ejection structure includes a slider I2. The upper front end of slider I2 has a product adhesive position 1. Slider I2 has an inlet / outlet 6. Inside slider I2 is a slider water passage 8 connected to slider II5 and the inlet / outlet 6. Pressure plates 3 at both ends of slider I2 limit its left and right movement. Slider II5 is located at the rear end of slider I2. A T-shaped guide block 4, which slides and inserts into slider I2, is located between slider I2 and slider II5. A slider pin 12, which is movably inserted into slider I2, is located at the lower part of slider I2. A spring 9 is located between slider pin 12 and slider II5, and a spring pressure block 10 is located between spring 9 and slider II5. A sliding block 11 is located between spring 9 and slider pin 12. A wear-resistant plate 7, which is movably inserted into sliding block 11, is located at the lower part of slider I2.

[0021] The workflow is as follows: Mold closing and injection molding stage: Slider I2 and slider II5 are in a closed state, together forming a complete cavity. Slider insert 12, under the action of spring 9, is in a retracted or pre-compressed state, and will not interfere with product molding. Cooling water cools the mold through slider water channel 8.

[0022] Initial stage of mold opening (first stroke): The injection molding machine drives the mold to open, and slider II5 begins to move backward under the drive of external mechanisms such as inclined guide pillars. Due to the connection of T-shaped guide block 4, slider II5 pulls slider I2 to move backward in sync, causing the slider as a whole to detach from the product body and complete the core-pulling action.

[0023] During this stage, the slider pin 12 remains stationary. Because the spring force of the spring 9 is designed to overcome the clamping force of the product on the slider pin, the slider pin is stationary relative to the slider I, and the product is still securely "hung" on the slider pin.

[0024] The push-out phase (second leg of the journey): When slider I2 completes the core pulling and moves to the predetermined position, it will be stopped by the external limit block.

[0025] At this point, slider II (5) continues to move backward. Since slider I has stopped while slider II continues to move, a relative displacement occurs between them. This displacement is allowed by the groove length of the T-shaped guide block (4).

[0026] The continuous movement of slider II 5 will compress spring 9. When the spring is compressed to a certain extent, its elastic force will be transmitted to slider pin 12 through slider block 11.

[0027] When the spring force is greater than the clamping force of the product on the slider pin, the slider pin 12 begins to move backward relative to the slider I 2, thereby smoothly ejecting the product from the slider I.

[0028] In summary, this double-section slider ejection structure features precise linkage and structural stability. Through the cooperation of slider I and slider II, and the intervention of springs and slider inserts, stable and reliable ejection of injection-molded products is achieved, avoiding problems such as tearing, deformation, or whitening that may occur with traditional ejection methods.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A double-section slider ejection structure, characterized in that: The device includes a slider I (2), with a product adhesive position (1) at the upper front end of the slider I (2), a slider II (5) at the rear end of the slider I (2), a slider pin (12) that is movably inserted into the slider I (2) at the lower part of the slider I (2), a spring (9) between the slider pin (12) and the slider II (5), a sliding block (11) between the spring (9) and the slider pin (12), and a wear-resistant plate (7) that is movably inserted into the slider block (11) at the lower part of the slider I (2).

2. The double-section slider ejection structure according to claim 1, characterized in that: The slider I (2) is provided with an inlet and outlet (6), and the slider I (2) is provided with a slider water channel (8) that is connected to the slider II (5) and the inlet and outlet (6).

3. The double-section slider ejection structure according to claim 1, characterized in that: A spring pressure block (10) is provided between the spring (9) and the slider II (5).

4. The double-section slider ejection structure according to claim 1, characterized in that: The slider I (2) is provided with pressure plates (3) at both ends to limit the left and right movement of the slider I (2).

5. The double-section slider ejection structure according to claim 1, characterized in that: A T-shaped guide block (4) is provided between slider I (2) and slider II (5) and slides in an interlocking manner with slider I (2).

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