Blade type inner plug elastic demolding structure

Abstract

The utility model provides a blade type inner plug elastic demolding structure, which belongs to the technical field of injection molds, and comprises a mold main body and a demolding assembly arranged in the mold main body, the demolding assembly comprises a fixed mold inner core, a fixed mold cavity, a floating sheet, a movable mold push sleeve, a floating core, a base plate, a large-head ejector pin, a floating gap and a supporting surface, and the fixed mold inner core is fixedly arranged in the mold main body through a bolt. The large-head ejector pin is matched with the floating core through a conical surface, friction in the ejection process is reduced, the service life of the mold is greatly prolonged, the fixed mold inner core is matched with the large-head ejector pin through a conical surface positioning column at the head to guarantee concentricity of the large-head ejector pin, and therefore internal and external concentricity of a product is guaranteed, the problem of eccentricity of the product is effectively solved, and the large-head ejector pin can smoothly eject the product. Deformation of the inner plug blade is reduced, the forming period is shortened, and the risks of blade deformation and tension crack are reduced by optimizing the demolding process, so that the production efficiency is improved, the defective rate is reduced, and the production cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a blade-type inner plug elastic demolding structure. Background Technology

[0002] Injection molds are tools used to produce various plastic products. They are formed by injecting heated and molten plastic material into the mold cavity, which then cools and solidifies to form the desired shape. The structure of an injection mold typically consists of two main parts: a moving mold and a fixed mold. The moving mold is mounted on the moving platen of the injection molding machine, while the fixed mold is mounted on the fixed platen. When the injection molding machine closes the mold, the moving mold and the fixed mold close and lock together, forming a closed cavity between the moving mold and the fixed mold for molding the plastic product.

[0003] In the field of mold manufacturing technology, some problems are prone to occur during the mold production process of blade-type inner plugs, such as eccentricity of inner and outer wall thickness, and excessive deformation or tearing of blades due to poor demolding. These problems not only affect product quality, but also reduce production efficiency and increase production costs. Therefore, it is particularly important to design a demolding structure that can effectively solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a blade-type inner plug elastic demolding structure, which aims to solve the problems raised in the background art.

[0005] The blade-type inner plug elastic release structure includes,

[0006] Mold body;

[0007] A demolding assembly is located inside the mold body, comprising: a fixed mold core, a fixed mold cavity, a floating plate, a moving mold push sleeve, a floating core, a backing plate, a large-head ejector pin, a floating gap, and a supporting surface. The fixed mold core is fixedly installed inside the mold body by bolts, and its bottom end is embedded inside the fixed mold cavity. The moving mold push sleeve is fitted onto the bottom outer wall of the fixed mold core. The large-head ejector pin is fitted onto the bottom outer wall of the fixed mold core. The floating core is fitted onto the outer wall of the large-head ejector pin. The floating plate is fitted onto the outer wall of the floating core. The floating gap is located in the space formed by the floating core and the backing plate. The supporting surface is located on the bottom outer wall of the floating core.

[0008] Furthermore, a support plate is fitted onto the outer wall of the large-headed pin.

[0009] Furthermore, a push plate is sleeved on the outer wall of the floating plate and the pad.

[0010] Furthermore, the floating core and the large-headed pin are matched with each other through a conical surface.

[0011] Furthermore, the fixed mold core and the large-head ejector pin are matched with each other through a conical positioning post.

[0012] Furthermore, the supporting surface matches the supporting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The demolding assembly features a large-head ejector pin and a floating core that engage via a conical surface to reduce friction during ejection, significantly extending mold life. The fixed mold core and the large-head ejector pin are aligned via a conical positioning post on the head to ensure concentricity, thus guaranteeing internal and external product concentricity and effectively solving the problem of product eccentricity. In the mold closed state, the lower end face of the floating core rests on the support surface of the support plate to withstand injection pressure. During ejection, the push plate moves forward a certain distance, pushing the floating core backward. This backward distance is the floating clearance, providing deformation space for the inner plug ejection, allowing the large-head ejector pin to smoothly eject the product, reducing the deformation of the inner plug blades, and shortening the molding cycle. By optimizing the demolding process, the risk of blade deformation and tearing is reduced, thereby improving production efficiency, reducing the defect rate, and saving production costs. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is an enlarged schematic diagram of utility model A.

[0018] In the diagram: 1. Mold body; 2. Fixed mold core; 3. Fixed mold cavity; 4. Floating plate; 5. Moving mold push sleeve; 6. Floating core; 7. Backing plate; 8. Large-head ejector pin; 601. Floating clearance; 602. Support surface; 9. Support plate; 10. Push plate. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-2 The technical solution provided in this embodiment is as follows:

[0023] The blade-type inner plug elastic release structure includes,

[0024] Mold body 1;

[0025] The demolding assembly is located inside the mold body 1. The demolding assembly includes a fixed mold core 2, a fixed mold cavity 3, a floating piece 4, a moving mold push sleeve 5, a floating core 6, a pad 7, a large-head ejector pin 8, a floating gap 601, and a support surface 602. The fixed mold core 2 is fixed inside the mold body 1 by bolts. The bottom end of the fixed mold core 2 is embedded inside the fixed mold cavity 3. The moving mold push sleeve 5 is fitted on the bottom outer wall of the fixed mold core 2. The large-head ejector pin 8 is fitted on the bottom outer wall of the fixed mold core 2. The floating core 6 is fitted on the outer wall of the large-head ejector pin 8. The floating piece 4 is fitted on the outer wall of the floating core 6. The floating gap 601 is located in the space formed by the floating core 6 and the pad 7. The support surface 602 is located on the bottom outer wall of the floating core 6.

[0026] In a specific embodiment of this utility model, the large-head ejector pin 8 and the floating core 6 are fitted with a conical surface to reduce friction during the ejection process and greatly improve the mold life. The fixed mold inner core 2 and the large-head ejector pin 8 are fitted with a conical positioning post at the head to ensure their concentricity, thereby ensuring the inner and outer concentricity of the product and solving the problem of product eccentricity. In the mold closed state, the lower end face of the floating core 6 sits on the support surface 602 of the support plate 9 to withstand the injection pressure. When ejecting and demolding, the push plate 10 moves forward a certain distance first. Since the inner plug blade is forcibly demolded, it pushes the floating core 6 backward. The backward distance is the floating gap 601, which makes room for deformation of the inner plug when it is ejected. The large-head ejector pin 8 ejects the product, and the inner plug blade has enough room for deformation, thereby reducing deformation and shortening the molding cycle.

[0027] Specifically, a support plate 9 is fitted on the outer wall of the large-headed pin 8.

[0028] In a specific embodiment of this utility model, the support surface 602 of the support plate 9 is designed to withstand injection molding pressure.

[0029] Specifically, a push plate 10 is fitted on the outer wall of the floating plate 4 and the pad 7.

[0030] In a specific embodiment of this utility model, during ejection and demolding, the push plate 10 first moves forward a certain distance.

[0031] Specifically, the floating core 6 and the large-head pin 8 are matched with each other through a conical surface.

[0032] In a specific embodiment of this invention, friction can be reduced.

[0033] Specifically, the fixed mold core 2 and the large-head ejector pin 8 are matched with each other through the conical positioning post.

[0034] In a specific embodiment of this utility model, concentricity is ensured to guarantee the internal and external concentricity of the product, thereby solving the problem of product eccentricity.

[0035] Specifically, the support surface 602 is matched with the support plate 9.

[0036] In a specific embodiment of this utility model, the support surface 602 and the support plate 9 are matched to each other, which can ensure their sealing performance.

[0037] Working principle:

[0038] The moving mold part and the fixed mold part of the mold body 1 are closed. The fixed mold core 2 is fixed inside the mold body 1 by bolts, and its bottom end is embedded in the fixed mold cavity 3. The moving mold push sleeve 5 and the large-head ejector pin 8 are both sleeved on the bottom outer wall of the fixed mold core 2. At this time, the floating core 6 is sleeved on the outer wall of the large-head ejector pin 8, and the floating plate 4 is sleeved on the outer wall of the floating core 6. The floating gap 601 is the space formed by the floating core 6 and the pad plate 7, and the support surface 602 is opened at the bottom outer wall of the floating core 6. When the mold is fully closed, the lower end face of the floating core 6 will sit on the support surface 602 of the support plate 9. The support plate 9 is sleeved on the outer wall of the large-head ejector pin 8. Its main function is to provide stable support for the floating core 6 to withstand the upcoming injection pressure. When the mold is closed... After completion, the injection molding machine injects the molten plastic material into the mold cavity. At this time, the lower end face of the floating core 6 sits on the support surface 602 of the support plate 9. This close contact ensures that the mold remains stable under injection pressure. The matching between the support surface 602 and the support plate 9 not only ensures the mold's sealing and prevents leakage of molten plastic, but also evenly distributes the injection pressure, avoiding mold damage or product defects caused by uneven pressure. During the demolding preparation stage, the push plate 10 is in its initial position, closely fitting the outer wall of the floating plate 4 and the pad 7. The main function of the push plate 10 is to push the floating core 6 backward during demolding, providing deformation space for the inner plug to eject. When injection is completed and the plastic product has cooled to a certain extent, the injection molding machine sends a demolding signal. This triggers the push plate 10 to begin its action, preparing for the ejection and demolding operation. Upon receiving the demolding signal, the push plate 10, driven by the power unit, moves forward a certain distance. Since the push plate 10 is tightly connected to the floating plate 4 and the pad 7, its forward movement directly pushes the floating core 6 backward. The distance the floating core 6 moves backward is the pre-designed floating gap 601. The existence of this floating gap 601 is crucial, as it provides the necessary deformation space for the inner plug to be ejected. As the floating core 6 moves backward, the inner plug blade, which was originally tightly attached to the outer wall of the floating core 6, begins to undergo elastic deformation due to the loss of some support. This deformation is controllable because the size of the floating gap 601 is precisely calculated to ensure that the inner plug blade has sufficient space during the demolding process. Stress is released during ejection, thus preventing excessive deformation or even tearing of the blades due to forced demolding. As the pusher plate 10 pushes the floating core 6 backward, the large-headed ejector pin 8 begins its ejection function. The large-headed ejector pin 8 and the floating core 6 are connected by a conical surface. This structural design allows the large-headed ejector pin 8 to smoothly push the product upward during ejection, reducing friction. Since deformation space has already been provided for the inner plug ejection, the inner plug blades can further adjust their shape within this space when the large-headed ejector pin 8 ejects the product, reducing the degree of deformation. With the continuous ejection action of the large-headed ejector pin 8, the product is gradually pushed out of the mold cavity. During this process, components such as the floating core 6 and floating plate 4 remain in a backward state under the push of the pusher plate 10.Ensure the inner plug blades always have sufficient space to complete the demolding action. Finally, the product is completely ejected from the mold, the demolding process is complete, and the product is ready for the next production cycle.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A blade inner plug elastic demolding structure, characterized in that, The utility model relates to a mould body (1); The utility model discloses a mould body (1) is provided with the demoulding assembly, wherein: the demoulding assembly includes fixed mould inner core (2), fixed mould cavity (3), floating piece (4), movable die push sleeve (5), floating core (6), backing plate (7), big head ejector pin (8), floating gap (601) and support surface (602), the fixed mould inner core (2) is fixedly arranged at the inside of the mould body (1) through bolt, the bottom end of fixed mould inner core (2) is embedded at the inside of fixed mould cavity (3), movable die push sleeve (5) is sleeved at the bottom end outer wall of fixed mould inner core (2), big head ejector pin (8) is sleeved at the bottom end outer wall of fixed mould inner core (2), floating core (6) is sleeved at the outer wall of big head ejector pin (8), floating piece (4) is sleeved at the outer wall of floating core (6), floating gap (601) is arranged at the space formed by floating core (6) and backing plate (7), and support surface (602) is opened at the bottom end outer wall of floating core (6). The outer wall of big head ejector pin (8) is sleeved with support plate (9).

2. The blade core elastic demolding structure according to claim 1, wherein The outer wall of floating piece (4) and backing plate (7) is sleeved with push plate (10).

3. The leaf inner plug elastic demolding structure according to claim 2, characterized in that, Floating core (6) and big head ejector pin (8) are matched with each other through the taper surface.

4. The blade core elastic demolding structure according to claim 3, characterized by, The fixed mould inner core (2) and big head ejector pin (8) are matched with each other through the taper locating column.

5. The leaf inner plug elastic demolding structure according to claim 4, characterized in that, Support surface (602) and support plate (9) are matched with each other.

6. The blade core elastic demolding structure according to claim 5, wherein ​

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