Two-layer slider sequential demolding high-speed impeller mold

Abstract

This utility model relates to the field of injection mold technology and discloses a high-speed impeller mold with two-layer slider sequential demolding, including a fixed mold base plate, a moving mold base plate, a cavity plate, a moving template, a backing plate, a core plate, and a slider assembly. The slider assembly consists of a first layer of sliders and a second layer of sliders. The first layer of sliders is slidably connected to the inclined groove of the moving template and moves along a preset inclination angle. The second layer of sliders is slidably connected to the horizontal groove of the backing plate. The disc-shaped gate of the hot runner system assembly is located at the center of the core plate. Guide pillars are provided between the moving mold base plate and the fixed mold base plate, and the core plate integrates a meandering cooling pipe. In this utility model, through the linkage design of the inclined groove and the horizontal groove, the two layers of sliders sequentially complete the oblique demolding and horizontal core pulling, completely eliminating the interference of helical curved surface demolding. The step-by-step timing control and rigid support structure significantly improve the reliability of the mold and are suitable for high-temperature and high-speed molding scenarios.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a high-speed impeller mold with two-layer slider sequential demolding. Background Technology

[0002] When manufacturing high-speed impeller parts, precision injection molding is required to meet the requirements of structural integrity and dynamic balance. Due to the multi-directional curved surface and concave features of the spiral curved blades of this type of impeller, traditional molds have inherent limitations during demolding: if a single slide block is used to forcibly pull the core, rigid interference will inevitably occur between the spiral curved surface and the mold core, leading to blade damage or even breakage; if too many slide blocks are used, it will result in redundant mold structure, complex action sequence, and difficulty in ensuring concentricity.

[0003] Existing molds generally struggle to reconcile the contradiction between demolding reliability and structural simplicity, especially for high-speed impellers with stringent requirements for rotational symmetry. Even slight damage or deformation during demolding can lead to dynamic imbalance errors. Therefore, there is an urgent need for a demolding mechanism that can release spatial constraints in layers according to a specific sequence, achieving non-destructive separation of helical surfaces while avoiding interference.

[0004] Therefore, this utility model proposes a high-speed impeller mold with two layers of sliders for sequential demolding to overcome the shortcomings of the prior art. Utility Model Content

[0005] To address the demolding interference problem caused by the complex spiral bending fan blade structure in existing high-speed impeller injection molds, namely the defects of forcibly pulling the core which easily damages the fan blade surface, and excessive splitting of the sliders which causes structural redundancy and makes it difficult to guarantee dynamic balance, this utility model aims to provide a high-speed impeller mold with an improved structure that enables sequential demolding of two layers of sliders.

[0006] This utility model provides a high-speed impeller mold with two-layer slider sequential demolding, including a fixed mold base plate, a cavity plate, a moving mold base plate, a moving template, a pad plate and a core plate; it also includes a slider assembly, which has a first layer slider and a second layer slider.

[0007] The first layer of sliders is slidably connected to an inclined groove on the moving template, the inclined groove extending away from the core plate; the second layer of sliders is slidably connected to a horizontal groove on the pad.

[0008] Furthermore, the moving template, pad, and slider assembly form a spatial linkage relationship through the inclined slide and the horizontal slide, so that the first layer of sliders can first detach from the blade surface along the inclined direction, and the second layer of sliders can then be completely pulled out along the horizontal direction.

[0009] Preferably, the slider assembly further includes a slider seat, and the first layer slider and the second layer slider are both fixedly installed on the slider seat by bolts. A slider guide wheel is rotatably provided on the slider seat, and the guide wheel makes rolling contact with the mold body to reduce frictional resistance.

[0010] Preferably, the mold further includes a hot runner system component, the gate of which is located at the forming position of the central shaft hole of the core plate, and the gate shape is disc-shaped to ensure that the molten plastic is evenly filled from the center to the edge of the impeller.

[0011] Preferably, the moving mold base plate is provided with an injection molding machine connecting shaft, the fixed mold base plate is fixed with a positioning ring, and the fixed mold base plate and the moving mold base plate are slidably connected by guide pillars to ensure coaxial accuracy during the mold opening and closing process.

[0012] Preferably, the mold is equipped with a slider drive cylinder and a control component. The output end of the slider drive cylinder is hinged to the slider assembly via a connecting rod. The control component drives the first layer slider and the second layer slider to move in steps based on a preset timing command.

[0013] Preferably, the mold cavity is embedded with molding auxiliary inserts and wear-resistant inserts, and the core plate is embedded with cooling system pipes, which are arranged in a meandering manner along the fan blade contour to achieve local rapid cooling.

[0014] Preferably, a support plate is added between the moving template and the moving mold base plate, and a pad is provided between the support plate and the moving mold base plate, together forming a rigid support frame to resist the deformation of the injection molding pressure.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by adopting a double slider sequential demolding structure composed of an inclined sliding layer and a horizontal sliding layer, the technological problem of existing injection molds being unable to achieve non-destructive demolding of high-speed impellers with complex concave spiral curved surfaces is solved. This achieves the technical effect of enabling the spiral curved fan blades to smoothly and stepwise detach from the mold cavity during the mold opening process, and completely eliminating core-pulling interference.

[0017] 2. In this utility model, by adopting a hot runner disc-shaped gate injection scheme in the center, the problem of impeller dynamic balance exceeding the tolerance caused by uneven filling in the traditional injection molding process is solved. This achieves the effect of making the molten plastic radiate evenly from the impeller shaft to each fan blade, ensuring consistent product density distribution and uniform shrinkage, and meeting the stringent technical indicator of dynamic balance accuracy of less than 1 milligram. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the two-layer slider sequential demolding high-speed impeller mold proposed in this utility model;

[0019] Figure 2This is a schematic diagram of the hot runner system component of the two-layer slider sequential demolding high-speed impeller mold proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the cavity plate of the two-layer slider sequential demolding high-speed impeller mold proposed in this utility model.

[0021] Legend:

[0022] 1. Fixed mold base plate; 2. Positioning ring; 3. Hot runner system components; 4. Slider seat; 5. Slider guide wheel; 6. Moving mold plate; 7. Slider assembly; 8. Support plate; 9. Pad block; 10. Injection molding machine connecting shaft; 11. Fixing plate; 12. Ejector rod; 13. Cavity plate; 14. Core plate; 15. Molding auxiliary insert; 16. Insert; 17. Slider drive cylinder; 18. Moving mold base plate; 19. Guide pillar; 20. Ejector plate; 21. Runner plate; 22. Control components; 23. Cooling system piping. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Example:

[0025] Please refer to Figures 1 to 3 This utility model provides a two-layer slider sequential demolding high-speed impeller mold, which aims to solve the problems of demolding plastic parts with complex concave spiral surfaces and the difficulty in ensuring dynamic balance accuracy after molding in the prior art.

[0026] like Figure 1As shown, the high-speed impeller mold with two-layer slider sequential demolding includes a fixed mold base plate 1 and a movable mold base plate 18. A cavity plate 13 is fixedly connected to the fixed mold base plate 1. A movable mold plate 6 and a pad plate 9 fixedly connected to one side of the movable mold plate 6 are provided on the movable mold base plate 18. A core plate 14 is also fixedly connected to the movable mold plate 6. The cavity plate 13 and the core plate 14 together form a mold cavity for forming a high-speed impeller when the mold is closed. The core of the mold is a set of slider assembly 7. The slider assembly 7 includes a first layer slider slidably connected to the movable mold plate 6 and a second layer slider slidably connected to the pad plate 9. A first groove for guiding the movement of the first layer slider is provided on the movable mold plate 6. The first groove extends at an inclined angle away from the core plate 14. A second groove for guiding the movement of the second layer slider is provided on the pad plate 9. The second groove extends in the horizontal direction. By sliding the first layer slider in the inclined direction and the second layer slider in the horizontal direction, the two layers of sliders can smoothly detach from the spirally bent blade structure of the formed high-speed impeller in a sequential manner.

[0027] To solve the above-mentioned technical problems, the core of the technical solution of this embodiment is that the two-layer slider sequential demolding high-speed impeller mold also includes multiple auxiliary components for supporting and driving the slider assembly 7, and these components form a specific structural fit and connection relationship with the aforementioned moving template 6, pad 9 and slider assembly 7.

[0028] Please refer to the following carefully. Figure 1 The core structure is described in detail below: The slider assembly 7 also includes a slider seat 4. Both the first and second layer sliders are mounted on the slider seat 4. The slider seat 4 serves as an integral support platform, ensuring the relative positional stability of the two layers of sliders during movement. A slider guide wheel 5 is also rotatably mounted on the slider seat 4. The slider guide wheel 5 provides rolling support and guidance during the movement of the slider assembly 7, reducing friction and ensuring smooth sliding. To achieve the demolding action of the slider assembly 7, the mold is also equipped with a slider drive cylinder 17 and a control component 22. The output end of the slider drive cylinder 17 is connected to the slider assembly 7 for transmission, providing power for the reciprocating motion of the slider assembly 7. The control component 22 is electrically connected to the slider drive cylinder 17. The control component 22 can precisely control the timing and stroke of the slider drive cylinder 17. During mold opening, the first layer slider is first driven to complete the oblique core-pulling action along the first slide groove, and then the second layer slider is driven to complete the horizontal core-pulling action along the second slide groove. Through this combination of electrical control and mechanical structure, the strict sequential demolding of the two layers of sliders is achieved, thus perfectly solving the demolding problem of the spiral curved surface.

[0029] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0030] As a preferred embodiment, to achieve high-precision injection molding, the mold also includes a hot runner system component 3 and a runner plate 21, please refer to... Figure 2 The hot runner system component 3 passes through the fixed mold base plate 1 and is connected to the runner plate 21. Its gate is set in the mold cavity for forming the central shaft hole of the impeller. This central gate design is conducive to the uniform filling of molten plastic from the center to the surrounding area, ensuring the density and shrinkage consistency of each part of the finished product.

[0031] In a preferred embodiment, to achieve automatic ejection of the plastic part, the mold also includes a fixed plate 11, a push rod 12 and a push plate 20. The fixed plate 11 is located on the outside of the moving mold base plate 18. The push rod 12 passes through the moving mold base plate 18 and is connected to the fixed plate 11 at one end and to the push plate 20 at the other end. After the mold is opened, the push rod 12 pushes the push plate 20 under external power to eject the high-speed impeller after molding from the core plate 14.

[0032] As a preferred embodiment, in order to ensure the installation accuracy of the mold on the injection molding machine and the guiding accuracy of mold opening and closing, a positioning ring 2 is also provided on the fixed mold base plate 1, and an injection molding machine connecting shaft 10 is also provided on the moving mold base plate 18. The fixed mold base plate 1 and the moving mold base plate 18 are slidably connected by guide pillars 19.

[0033] In a preferred embodiment, to enhance the structural rigidity and support strength of the moving mold part, the mold also includes a support plate 8 and a pad 9. The support plate 8 is disposed between the moving mold plate 6 and the moving mold base plate 18, and the pad 9 is disposed between the support plate 8 and the moving mold base plate 18, together providing stable support for the moving mold plate 6 and the core plate 14.

[0034] As a preferred embodiment, please refer to Figure 3 To facilitate the fine structure of the molded impeller, a molding auxiliary insert 15 and an insert 16 are also provided in the mold cavity. In order to accurately control the mold temperature during the molding process, a cooling system pipe 23 is also embedded in the cavity plate 13 or the core plate 14.

[0035] Working principle: When the mold is working, the fixed mold base plate 1 and the moving mold base plate 18 first close the mold under the precise guidance of the guide pillar 19. The positioning ring 2 ensures the installation and positioning of the mold on the injection molding machine. The injection molding machine connecting shaft 10 is connected to the mold. Molten plastic is injected from the gate set in the center of the mold cavity through the hot runner system component 3 and the runner plate 21. It evenly fills the mold cavity formed by the cavity plate 13, the core plate 14, the molding auxiliary insert 15 and the insert 16. During the injection and holding pressure process, the cooling system pipe 23 circulates and cools the mold to ensure stable molding of the plastic part.

[0036] After the plastic part is formed, the mold begins to open. At this time, the control component 22 issues a command to start the slider drive cylinder 17. The slider drive cylinder 17 first drives the first layer of sliders in the slider assembly 7. Under the guidance of the first groove on the moving template 6, the first layer of sliders slides outward along the preset tilt angle to realize the first step of core pulling of the spiral curved fan blade. As the mold continues to open, the control component 22 then controls the slider drive cylinder 17 to drive the second layer of sliders. Under the guidance of the second groove on the pad plate 9, the second layer of sliders slides outward along the horizontal direction to complete the second step of core pulling of the spiral curved fan blade. With the assistance of the slider seat 4 and the slider guide wheel 5, the entire demolding process is smooth and stable. Through the coordinated sequential action of the first layer of sliders and the second layer of sliders, this utility model solves the problem of difficult demolding of complex spiral curved surfaces caused by structural interference in the prior art. After the two layers of sliders are completely separated from the plastic part, the fixed plate 11 drives the push rod 12. The push rod 12 pushes the push plate 20 to push the formed high-speed impeller completely out of the core plate 14.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations 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 two-layer slider sequential demolding high-speed impeller mold, comprising a fixed mold base plate (1) and a moving mold base plate (18), wherein a cavity plate (13) is fixedly connected to the fixed mold base plate (1), and a moving template plate (6) and a pad block (9) fixedly connected to one side of the moving template plate (6) are provided on the moving template plate (18), and a core plate (14) is also fixedly connected to the moving template plate (6), wherein the cavity plate (13) and the core plate (14) together form a mold cavity in the mold closing state; characterized in that It also includes a slider assembly (7), which includes a first layer slider slidably connected to the moving template (6) and a second layer slider slidably connected to the pad (9); The moving template (6) is provided with a first groove for guiding the movement of the first layer slider, and the first groove extends along an inclined angle away from the core plate (14); The pad (9) has a second groove for guiding the movement of the second layer slider, and the second groove extends in the horizontal direction.

2. The two-layer slider sequential demolding high speed impeller mold according to claim 1, characterized in that, The slider assembly (7) also includes a slider seat (4), on which the first layer slider and the second layer slider are mounted; a slider guide wheel (5) is also rotatably mounted on the slider seat (4).

3. The two-layer slider sequential demolding high speed impeller mold according to claim 1, characterized in that, It also includes a slider drive cylinder (17) and a control component (22), the output end of which is connected to the slider assembly (7) in a transmission connection, and the control component (22) is electrically connected to the slider drive cylinder (17).

4. The two-layer slider sequential demolding high speed impeller mold according to claim 1, characterized in that, It also includes a hot runner system assembly (3) and a runner plate (21), wherein the hot runner system assembly (3) passes through the fixed mold base plate (1) and is connected to the runner plate (21), and its gate is located in the mold cavity for forming the impeller central shaft hole.

5. The high-speed impeller mold with two-layer slider sequential demolding according to claim 1, characterized in that, It also includes a fixing plate (11), a push rod (12) and a push plate (20). The fixing plate (11) is located on the outside of the moving mold base plate (18). The push rod (12) passes through the moving mold base plate (18) and is connected at one end to the fixing plate (11) and at the other end to the push plate (20).

6. The two-layer slider sequential demolding high-speed impeller mold according to claim 1, characterized in that, The fixed mold base plate (1) is also provided with a positioning ring (2); the moving mold base plate (18) is also provided with an injection molding machine connecting shaft (10); the fixed mold base plate (1) and the moving mold base plate (18) are slidably connected by a guide post (19).

7. The two-layer slider sequential demolding high-speed impeller mold according to claim 1, characterized in that, It also includes a support plate (8) and a pad (9), wherein the support plate (8) is disposed between the moving template (6) and the moving template base plate (18), and the pad (9) is disposed between the support plate (8) and the moving template base plate (18).

8. The two-layer slider sequential demolding high-speed impeller mold according to claim 1, characterized in that, The mold cavity is also provided with molding auxiliary inserts (15) and inserts (16); cooling system pipes (23) are also embedded in the cavity plate (13) or the core plate (14).

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