Plastic mold ejector pin reset adjustment mechanism

Abstract

The application discloses a plastic mold ejector pin reset adjusting mechanism and belongs to the mold field. The plastic mold ejector pin reset adjusting mechanism comprises an ejector pin, a reset spring and an upper die body with a core, the bottom of the upper die body is fixed with an upper fixed plate, the lower side of the upper fixed plate is provided with a lower fixed plate, pillow blocks are connected between the two sides of the lower fixed plate and the upper fixed plate, the lower fixed plate is provided with a lining plate and a connecting plate, the ejector pin is assembled on the connecting plate, the ejector pin penetrates through the upper fixed plate and extends into the upper die body, the bottom of the upper fixed plate is provided with an upper supporting plate, the reset spring is arranged between the connecting plate and the upper supporting plate, and the upper supporting plate is assembled with an adjusting bolt. The plastic mold ejector pin reset adjusting mechanism has the beneficial effects that the reset condition of the ejector pin can be flexibly adjusted according to the demolding requirements of different products or the use condition of the mold by arranging the adjusting bolt and the upper supporting plate, and the generality and applicability of the mold are improved.

Description

Technical Field

[0001] This application relates to the field of molds, and more specifically, to a reset and adjustment mechanism for ejector pins in plastic molds. Background Technology

[0002] Plastic molds, as an important industrial production tool, are widely used in the molding and manufacturing of various plastic products. During the operation of a plastic mold, the ejector mechanism is a key component ensuring smooth product demolding. Ejector pins push the molded product out of the core when the mold opens, achieving separation between the product and the mold.

[0003] However, traditional ejector pin mechanisms in plastic molds often lack effective adjustment methods for their ejector pin reset function. During mold use, due to variations in the shape, size, and demolding requirements of different products, or wear and tear on mold components after prolonged use, the reset state of the ejector pins may change. For example, incomplete ejector pin reset may prevent the product from completely detaching from the core, affecting the next injection molding; while excessive ejector pin reset may cause the ejector pin to collide with other mold components, resulting in damage to the ejector pin or the mold itself. However, most existing ejector pin mechanisms cannot flexibly adjust the ejector pin reset according to actual conditions. Therefore, this application proposes an ejector pin reset adjustment mechanism for plastic molds. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] The purpose of this application is to address the shortcomings of existing technologies by providing a plastic mold ejector pin reset adjustment mechanism, thereby solving the problem that existing plastic mold ejector pin reset mechanisms are difficult to adapt and adjust.

[0006] To achieve the above objectives, this application provides the following technical solution: A plastic mold ejector pin reset adjustment mechanism includes an ejector pin, a reset spring, and an upper mold body with a core. An upper fixing plate is fixed to the bottom of the upper mold body, and a lower fixing plate is provided below the upper fixing plate. Pillar blocks are connected between the two sides of the lower fixing plate and the upper fixing plate. A liner plate and a connecting plate are provided on the lower fixing plate. The ejector pin is assembled on the connecting plate and extends through the upper fixing plate into the upper mold body. An upper support plate is provided at the bottom of the upper fixing plate. The reset spring is provided between the connecting plate and the upper support plate. An adjusting bolt is assembled on the upper support plate. The adjusting bolt is threadedly engaged with the upper fixing plate. Tightening the adjusting bolt forces the upper support plate to move closer to or away from the upper fixing plate.

[0007] Furthermore, a top rod is provided at the bottom of the lower fixing plate, and the top end of the top rod passes through the lower fixing plate and abuts against the liner.

[0008] Furthermore, a lower support plate is provided on the upper surface of the connecting plate, and the bottom end of the reset spring abuts against the lower support plate.

[0009] Furthermore, the lower surface of the lower support plate is provided with a protrusion, which is fitted into the connecting plate.

[0010] Furthermore, two ejector pins are arranged side by side, and the upper support plate and the lower support plate are located between the two ejector pins. The bottom end of the ejector pin is provided with a "T"-shaped protrusion, which is embedded in the connecting plate.

[0011] Furthermore, two reset springs are arranged side by side, and a limiting rod is vertically inserted into each of the two reset springs. An adapter hole is provided on the upper fixing plate, and the top of the limiting rod passes through the upper support plate and is inserted into the adapter hole.

[0012] Furthermore, guide rods are provided at the four corners of the upper mold body. The guide rods protrude from the upper end face of the upper mold body, and the bottom end of the guide rods has a "T"-shaped protrusion that is embedded in the upper mold body.

[0013] The beneficial effects of this application are as follows: By pushing the liner and connecting plate upward with the ejector pin, the product formed in the core can be reliably ejected, achieving smooth demolding. This effectively avoids damage to the product due to demolding difficulties and improves the product qualification rate.

[0014] By setting an adjusting bolt and an upper support plate, the distance between the upper support plate and the upper fixed plate can be easily adjusted by turning the adjusting bolt, thereby adjusting the initial compression of the return spring. This allows for flexible adjustment of the ejector pin's reset status according to the demolding requirements of different products or the usage of the mold, improving the versatility and applicability of the mold. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0016] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2This is a schematic cross-sectional view of the structure of this application; Figure 3 This is a structural schematic diagram of the ejector pin and the upper fixing plate of this application; Figure 4 This is a schematic diagram of the structure of the reset spring, lower support plate, and upper support plate of this application.

[0018] Reference numerals: 1. Upper mold body; 2. Upper fixing plate; 3. Pillow block; 4. Lower fixing plate; 5. Core; 6. Guide rod; 7. Liner plate; 8. Connecting plate; 9. Ejector pin; 10. Return spring; 11. Ejector rod; 12. Lower support plate; 13. Upper support plate; 14. Adapter hole; 15. Limiting rod; 16. Adjusting bolt; 17. Protrusion. Detailed Implementation

[0019] The plastic mold ejector pin reset and adjustment mechanism provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0020] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0021] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0022] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figure 1-4As shown, this utility model provides a plastic mold ejector pin reset adjustment mechanism, including an upper mold body 1, an ejector pin 9, a reset spring 10, and an adjusting bolt 16. The upper mold body 1 has a core 5, and guide rods 6 are installed at the four corners of the upper mold body 1. The bottom end of the guide rod 6 has a "T"-shaped protrusion, which is embedded in the upper mold body 1. The guide rod 6 protrudes from the upper end face of the upper mold body 1 and plays a guiding role during the opening and closing of the mold.

[0024] Furthermore, in this embodiment, an upper fixing plate 2 is fixed to the bottom of the upper mold body 1, and a lower fixing plate 4 is provided below the upper fixing plate 2. Pillow blocks 3 are installed between the two sides of the upper fixing plate 2 and the two sides of the lower fixing plate 4, and the pillow blocks 3 serve to support and stabilize the structure. A liner plate 7 and a connecting plate 8 are installed on the lower fixing plate 4, and a push rod 11 is provided at the bottom of the lower fixing plate 4. The top end of the push rod 11 passes through the lower fixing plate 4 and abuts against the liner plate 7. Two ejector pins 9 are arranged side by side and are assembled on the connecting plate 8. The ejector pins 9 penetrate the upper fixing plate 2 and extend into the upper mold body 1. A "T"-shaped protrusion is provided at the bottom end of the ejector pin 9, and the "T"-shaped protrusion is embedded in the connecting plate 8 to ensure that the ejector pin 9 is installed firmly.

[0025] Furthermore, in this embodiment, a lower support plate 12 is provided on the upper surface of the connecting plate 8, and a protrusion 17 is provided on the upper surface of the lower support plate 12. The protrusion 17 is fitted into the connecting plate 8. An upper support plate 13 is provided at the bottom of the upper fixing plate 2. Two return springs 10 are arranged side by side and are positioned between the connecting plate 8 and the upper support plate 13. Specifically, the bottom end of the return spring 10 abuts against the lower support plate 12. A limiting rod 15 is vertically inserted into the two return springs 10. An adapter hole 14 is opened on the upper fixing plate 2. The top end of the limiting rod 15 passes through the upper support plate 13 and is inserted into the adapter hole 14. The limiting rod 15 serves to limit the compression direction of the return spring 10 and prevent it from being excessively deformed.

[0026] Furthermore, in this embodiment, an adjusting bolt 16 is mounted on the upper support plate 13. The adjusting bolt 16 is threadedly connected to the upper fixed plate 2. By turning the adjusting bolt 16, the upper support plate 13 can be forced to move closer to or further away from the upper fixed plate 2.

[0027] Working Principle: In the mold-closed state, the top of ejector pin 9 maintains a certain distance from the surface of the product formed inside the core 5, and the return spring 10 is in its initial state with a certain initial compression. When the mold opens, the ejector rod 11 pushes the liner plate 7 upwards, which in turn moves the connecting plate 8 upwards. Since ejector pin 9 is mounted on the connecting plate 8, the upward movement of the connecting plate 8 forces ejector pin 9 upwards, and the top of ejector pin 9 ejects the product formed inside the core 5, achieving product demolding. After demolding, ejector pin 9 needs to be reset. At this time, the return spring 10, relying on its own elastic force, pushes the connecting plate 8 downwards, which in turn moves ejector pin 9 downwards, restoring it to its initial position. When the reset of ejector pin 9 needs to be adjusted according to the demolding requirements of different products or the usage of the mold, the adjusting bolt 16 is turned. Since the adjusting bolt 16 is threadedly engaged with the upper fixed plate 2, turning the adjusting bolt 16 forces the upper support plate 13 to move closer to or further away from the upper fixed plate 2. Since the reset spring 10 is located between the connecting plate 8 and the upper support plate 13, the movement of the upper support plate 13 will change the distance between the lower support plate 12 and the upper support plate 13. The lower support plate 12 is engaged with the connecting plate 8, thereby adjusting the initial compression of the reset spring 10 and realizing the adjustment of the reset of the ejector pin 9.

[0028] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

[0029] It should be noted that this application covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of this application. To provide the public with a thorough understanding of this application, specific details are described in detail in the preferred embodiments, while those skilled in the art can fully understand this application without these details. Furthermore, to avoid unnecessary confusion regarding the substance of this application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0030] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A plastic mold ejector pin reset adjustment mechanism, comprising an ejector pin (9), a reset spring (10), and an upper mold body (1) having a core (5): characterized in that: The upper mold body (1) is fixed with an upper fixing plate (2) at the bottom. A lower fixing plate (4) is provided below the upper fixing plate (2). Pillow blocks (3) are connected between the lower fixing plate (4) and the two sides of the upper fixing plate (2). A liner plate (7) and a connecting plate (8) are provided on the lower fixing plate (4). The ejector pin (9) is assembled on the connecting plate (8). The ejector pin (9) passes through the upper fixing plate (2) and extends into the upper mold body (1). An upper support plate (13) is provided at the bottom of the upper fixing plate (2). A reset spring (10) is provided between the connecting plate (8) and the upper support plate (13). An adjusting bolt (16) is assembled on the upper support plate (13). The adjusting bolt (16) is threadedly engaged with the upper fixing plate (2). Tightening the adjusting bolt (16) forces the upper support plate (13) to move closer to or away from the upper fixing plate (2).

2. The plastic mold ejector pin reset and adjustment mechanism according to claim 1, characterized in that: The bottom of the lower fixing plate (4) is provided with a top rod (11), and the top end of the top rod (11) passes through the lower fixing plate (4) and abuts against the liner (7).

3. The plastic mold ejector pin reset and adjustment mechanism according to claim 1, characterized in that: The upper surface of the connecting plate (8) is provided with a lower support plate (12), and the bottom end of the reset spring (10) abuts against the lower support plate (12).

4. The plastic mold ejector pin reset and adjustment mechanism according to claim 3, characterized in that: The lower support plate (12) has a protrusion (17) on its lower surface, and the protrusion (17) is fitted into the connecting plate (8).

5. The plastic mold ejector pin reset and adjustment mechanism according to claim 4, characterized in that: Two ejector pins (9) are arranged side by side. The upper support plate (13) and the lower support plate (12) are located between the two ejector pins (9). The bottom end of the ejector pin (9) is provided with a "T"-shaped protrusion, which is embedded in the connecting plate (8).

6. The plastic mold ejector pin reset and adjustment mechanism according to claim 1, characterized in that: Two reset springs (10) are arranged side by side, and a limiting rod (15) is vertically inserted inside the two reset springs (10). An adapter hole (14) is opened on the upper fixing plate (2). The top of the limiting rod (15) passes through the upper support plate (13) and is inserted into the adapter hole (14).

7. The plastic mold ejector pin reset and adjustment mechanism according to claim 1, characterized in that: The upper mold body (1) is provided with guide rods (6) at the four corners. The guide rods (6) protrude from the upper end face of the upper mold body (1). The bottom end of the guide rods (6) has a "T" shaped protrusion, which is embedded in the upper mold body (1).

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