A structure of an oil cylinder driving a slider to perform secondary motion

Abstract

The utility model relates to a structure that oil cylinder drives slider to carry out secondary motion belongs to the technical field of injection mold, including die holder, be equipped with injection insert on the die holder, be equipped with die core between injection insert and die holder, both sides of die core are equipped with demolding slider module assembly, be equipped with injection product between die core and demolding slider module assembly, die core upper end. Demolding slider module assembly includes slider I, the lower end of slider I is equipped with demolding oil cylinder that drives slider I to push out sliding when demolding, the upper end of slider I is equipped with slider II, slider II and injection product are equipped with reverse buckle spare that is integration with injection product between, reverse buckle spare and slider II are inserted and inlaid with sliding. Have compact structure, control simple, power single and the characteristics of high reliability. Solve the demolding problem of complex reverse buckle on injection product. Through an oil cylinder drive, realized slider's twice sequential motion, thereby safely, reliably ejects the product from the mold.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a structure in which a hydraulic cylinder drives a slider to perform secondary motion. Background Technology

[0002] In the modern injection mold industry, with increasingly complex product structures (such as automotive interior and exterior trim, home appliance housings, and electronic products), side undercuts, deep ribs, and hooks are becoming more and more common. When these structures are being molded, relying solely on simple ejection or a single slide core pull can easily lead to product tearing, deformation, or even breakage, affecting yield and production efficiency. To solve this problem, the industry commonly uses slide mechanisms and angled ejector mechanisms for side parting and core pulling. However, when the undercut structure is complex, the clamping force is high, or the undercut is integrated with the product body, a single-action slide or angled ejector often cannot safely and reliably complete demolding.

[0003] Traditional single-slider / angled-top core pulling is suitable for simple undercuts, but when faced with complex undercuts (such as undercuts both inside and outside, deep undercuts, or undercuts integrated with the product body), problems such as product sticking to the slider, tearing, and breakage are prone to occur. Some methods use "forced release" (i.e., forcibly pulling the product out of the undercut), but this requires the undercut to be designed to be thinner and the corners to be rounded, which will weaken the product's structural strength.

[0004] To address complex inverted threading issues, the industry has developed secondary ejection or secondary core-pulling mechanisms. Common examples include: Hydraulic cylinder + slider insert combination: first pull the core of the slider, then pull the insert inside the slider to achieve step demolding.

[0005] Dual slider linkage: The mechanical structure enables two sliders to move in sequence, each handling the undercut in different directions.

[0006] The combination of slanted top and slider: first, the slanted top disengages from the inner undercut, and then the slider disengages from the outer undercut, but the structure is complex and occupies a lot of space.

[0007] While these solutions can solve some problems, they generally suffer from drawbacks such as complex structure, numerous parts, high difficulty in processing and assembly, poor control precision, or the need for multiple power sources. Summary of the Invention

[0008] This invention primarily addresses the shortcomings of existing technologies by providing a structure where a hydraulic cylinder drives a slider in a secondary motion. This structure is characterized by its compact design, simple control, single power source, and high reliability. It solves the demolding problem associated with complex undercuts in injection-molded products. Through a single hydraulic cylinder drive, the slider undergoes two sequential movements, thus safely and reliably ejecting the product from the mold.

[0009] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A structure for a hydraulic cylinder to drive a slider to perform secondary motion includes a mold base, an injection molding insert on the mold base, a mold core between the injection molding insert and the mold base, and demolding slider assemblies on both sides of the mold core. An injection molded product is positioned between the mold core and the demolding slider assemblies, and at the upper end of the mold core. The demolding slider assembly includes slider I, with a demolding cylinder at the lower end of slider I for pushing and sliding during demolding. Slider II is located at the upper end of slider I. An undercut, integrally formed with the injection molded product, is provided between slider II and the injection molded product, and the undercut is slidably inserted into slider II.

[0010] Preferably, the upper end of slider I is provided with an inclined guide post that passes through slider II and extends beyond the upper end of slider II, and the slider II is provided with a spring that presses against the inclined guide post.

[0011] Preferably, a guide rod sleeve is provided between the lower end of slider II and slider I, which is inserted into slider I. The guide rod sleeve is provided with a positioning guide rod that is inserted into slider II in a slot-like manner.

[0012] Preferably, the guide rod sleeve is provided with a spring that is sleeved with the positioning guide rod.

[0013] Preferably, a connecting block is provided between the front end of the demolding cylinder and the slider I.

[0014] This invention can achieve the following effects: This invention provides a structure in which a hydraulic cylinder drives a slider to perform a secondary motion. Compared with existing technologies, it features a compact structure, simple control, single power source, and high reliability. It solves the demolding problem of complex undercuts in injection-molded products. Driven by a single hydraulic cylinder, the slider undergoes two sequential movements, thus safely and reliably ejecting the product from the mold.

[0015] Simple power source and easy control: The complex "upper then outer" core-pulling action can be completed using only one cylinder, reducing the complexity of the hydraulic system and the control cost.

[0016] Compact structure and high reliability: The entire mechanism is highly integrated and achieves sequential actions through pure mechanical linkage, avoiding the use of multiple power sources or complex electronic control programs, and ensuring stable and reliable operation.

[0017] High-quality demolding: The product detaches from the undercut in stages, avoiding deformation or damage caused by forced pulling, thus ensuring the final quality of the product.

[0018] Wide range of applications: It is very suitable for solving the demolding problem of products with complex side hooks or clips, such as automotive interior and exterior trim, home appliance housings, and electronic products. Attached Figure Description

[0019] Figure 1 This is a top view of the structure of this utility model.

[0020] Figure 2 This is a front view of the structural cross-section of this utility model.

[0021] Figure 3 This is a schematic diagram of the slider in the closed state in this utility model.

[0022] Figure 4 This is a front view of the structure in the first ejection state of the slider in this utility model.

[0023] Figure 5 This is a side view of the structure in the first ejection state of the slider in this utility model.

[0024] Figure 6 This is a front view of the structure in the second ejection state of the slider in this utility model.

[0025] In the diagram: mold base 1, mold core 2, injection insert 3, demolding slider assembly 4, connecting block 5, demolding cylinder 6, slider I 7, inclined guide post 8, spring 9, slider II 10, guide rod sleeve 11, positioning guide rod 12, injection molded product 13, undercut 14. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] Example: Figure 1-6 As shown, a structure for a hydraulic cylinder to drive a slider to perform secondary motion includes a mold base 1, an injection molding insert 3 on the mold base 1, a mold core 2 between the injection molding insert 3 and the mold base 1, and demolding slider assemblies 4 on both sides of the mold core 2. An injection molded product 13 is located between the mold core 2 and the demolding slider assembly 4, and at the upper end of the mold core 2. The demolding slider assembly 4 includes a slider I 7. A demolding hydraulic cylinder 6 is located at the lower end of the slider I 7 to drive the slider I 7 to slide out during demolding. A connecting block 5 is located between the front end of the demolding hydraulic cylinder 6 and the slider I 7. A slider II 10 is located at the upper end of the slider I 7. A guide rod sleeve 11, which is inserted into the slider I 7, is located between the lower end of the slider II 10 and the slider I 7. A positioning guide rod 12, which is slotted into the slider II 10, is located inside the guide rod sleeve 11 and is sleeved with the positioning guide rod 12. A snap fastener 14, which is integrated with the injection molded product 13, is provided between slider II 10 and injection molded product 13. The snap fastener 14 is slidably inserted into slider II 10. A slanted guide post 8 is provided at the upper end of slider I 7, which passes through slider II 10 and extends out of the upper end of slider II 10. A spring 9 is provided inside slider II 10, which is pressed against the slanted guide post 8.

[0028] Workflow: Injection molding with mold closed: Slider I7 and slider II10 are in the closed position, and spring 9 is compressed. Molten plastic is injected into the mold cavity to form injection molded product 13 with undercut 14.

[0029] Mold opening: The moving and fixed molds separate to make room for the movement of the slider.

[0030] Demolding begins: The piston rod of demolding cylinder 6 extends and pushes slider I7 outward through connecting block 5.

[0031] Perform the first movement (vertical core pulling): Slider I7 moves, the inclined guide post 8 pushes slider II10 upward, and the undercut 14 disengages from the undercut on the side wall of the product.

[0032] The second movement (horizontal core pulling) is performed: After slider II 10 is pushed to its highest point, the positioning guide rod 12 is limited by the guide rod sleeve 11. Slider I 7 continues to move, driving slider II 10 to move outward together, completely clearing the product ejection path.

[0033] Product Ejection: The mold's ejection system (such as ejector pins) ejects the injection molded product 13 from the mold core 2.

[0034] Mechanism reset: The piston rod of the demolding cylinder 6 retracts, pulling slider I 7 inward. Guided by the inclined guide post 8 and assisted by the spring 9, slider II 10 first moves downward and then inward, precisely resetting and preparing for the next production cycle.

[0035] In summary, this structure, where the hydraulic cylinder drives the slider in a secondary motion, features a compact structure, simple control, single power source, and high reliability. It solves the demolding problem of complex undercuts in injection-molded products. Driven by a single hydraulic cylinder, it achieves two sequential movements of the slider, thus safely and reliably ejecting the product from the mold.

[0036] Compact structure: The complex secondary motion is integrated into a single slider assembly, saving mold space.

[0037] Single power source: The complex demolding action of two steps can be completed using only one hydraulic cylinder, which reduces the difficulty of control and the cost.

[0038] Reliable operation: Sequential movement is achieved through a purely mechanical structure (slanted guide post, guide rod, spring), resulting in stable, reliable operation that is less prone to errors.

[0039] High applicability: It is particularly suitable for solving the demolding problem of products with complex, integrated undercuts on the side, and has high application value in the fields of automotive interiors and electronic product shells.

[0040] 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.

[0041] 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 structure in which a hydraulic cylinder drives a slider to perform secondary motion, comprising a mold base (1), wherein an injection molding insert (3) is provided on the mold base (1), and a mold core (2) is provided between the injection molding insert (3) and the mold base (1), characterized in that: The mold core (2) is provided with demolding slider assemblies (4) on both sides. The mold core (2) and the demolding slider assembly (4) are connected, and the upper end of the mold core (2) is provided with an injection molded product (13). The demolding slider assembly (4) includes slider I (7). The lower end of slider I (7) is provided with a demolding cylinder (6) that drives slider I (7) to slide out when demolding. The upper end of slider I (7) is provided with slider II (10). The slider II (10) and the injection molded product (13) are provided with an undercut (14) that is integrated with the injection molded product (13). The undercut (14) and slider II (10) are slidably inserted into each other.

2. The structure for a hydraulic cylinder to drive a slider to perform secondary motion according to claim 1, characterized in that: The upper end of the slider I (7) is provided with an inclined guide post (8) that passes through the slider II (10) and extends out of the upper end of the slider II (10). The slider II (10) is provided with a spring (9) that presses against the inclined guide post (8).

3. The structure for a hydraulic cylinder to drive a slider to perform secondary motion according to claim 1, characterized in that: The lower end of the slider II (10) is provided with a guide rod sleeve (11) that is inserted into the slider I (7), and the guide rod sleeve (11) is provided with a positioning guide rod (12) that is inserted into the slider II (10) in a slot.

4. The structure for a hydraulic cylinder to drive a slider to perform secondary motion according to claim 3, characterized in that: The guide rod sleeve (11) is provided with a spring (9) that is sleeved with the positioning guide rod (12).

5. The structure for a hydraulic cylinder to drive a slider to perform secondary motion according to claim 1, characterized in that: A connecting block (5) is provided between the front end of the demolding cylinder (6) and the slider I (7).

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