Ejection structure for injection mold

Abstract

The application relates to the ejection technology field of an injection mold, and discloses an injection mold ejection structure, which comprises a fixed mold and a movable mold, the fixed mold is clamped with the movable mold, and a connecting block is fixedly connected to the left and right sides of the fixed mold. In the application, a circular pipe and an air pipe are arranged, the output shaft of an electric push rod drives the movable mold to move downwards and be clamped with the fixed mold, injection raw materials are injected into the fixed mold from an injection hole, and an injection operation is completed; when demolding is performed after the injection is completed, an external air pump is connected in communication with the circular pipe, under the action of air pressure, the air pipe is lifted upwards by one centimeter, a gap is formed between an injection part and the fixed mold, at this moment, air is continuously pumped into the fixed mold from the air hole along with the continuous pumping of air, under the action of the continuous injection of air, the injection part is gradually separated from the fixed mold, so that the purpose of flexible demolding is achieved, compared with rigid demolding, the injection part can be effectively protected, the injection quality is improved, and the application is favorable for popularization and use.

Description

Technical Field

[0001] This application relates to the technical field of injection mold ejection, and in particular to an injection mold ejection structure. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are typically produced using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting.

[0003] However, in practical applications, most existing injection molds typically use rigid ejection structures for demolding. However, the molded parts are relatively soft when they are first molded, so rigid ejection methods can easily cause deformation of the molded parts, affecting the quality of the injection molding and hindering its widespread use.

[0004] Therefore, those skilled in the art have provided an injection mold ejection structure to solve the problems mentioned in the background art. Utility Model Content

[0005] To address the problem mentioned in the background art that injection molded parts are relatively soft immediately after molding, and therefore rigid ejection methods can easily cause deformation of the injection molded parts, affecting the injection quality and hindering widespread use, this application provides an ejection structure for injection molds.

[0006] The ejection structure of an injection mold provided in this application adopts the following technical solution: it includes a fixed mold and a moving mold, the fixed mold and the moving mold are engaged, connecting blocks are fixedly connected to both sides of the fixed mold, connecting rods are fixedly connected to the top sides of the four connecting blocks, the top ends of the four connecting rods are fixedly connected to the same mounting plate, an electric push rod is fixedly connected to the center of the top side of the mounting plate, the output shaft of the electric push rod is fixedly connected to the top side of the moving mold, an installation hole is opened on the bottom side of the fixed mold, a round tube is installed on the inner wall of the installation hole, an air pipe is slidably connected to the inner wall of the round tube, the inner diameter of the upper half of the round tube is smaller than the inner diameter of the lower half, multiple vent holes are opened on the outer wall of the air pipe, and an injection hole is opened on the right side of the fixed mold.

[0007] Preferably, the inner wall of the mounting hole is provided with an internal thread, and the outer side of the round tube is provided with an external thread, the external thread and the internal thread being threadedly connected to each other.

[0008] Preferably, a spring is fixedly connected to the inner wall of the top side of the circular tube, and the spring is fixedly connected to the air tube.

[0009] Preferably, a rubber ring is fixedly sleeved on the outer side of the circular tube.

[0010] In summary, this application includes the following beneficial technical effects:

[0011] 1. By setting up a circular tube and an air pipe, the output shaft of the electric push rod drives the moving mold to move downwards and engage with the fixed mold, injecting the injection material into the fixed mold through the injection hole to complete the injection molding operation. When demolding is completed, the external air pump is connected to the circular tube. Under the action of air pressure, the air pipe will be raised by one centimeter, creating a gap between the injection molded part and the fixed mold. At this time, as air is continuously pumped in, air will be continuously pumped into the fixed mold through the vent hole. Under the action of continuous air injection, the injection molded part will gradually separate from the fixed mold, thereby achieving the purpose of flexible demolding. Compared with rigid demolding, it can effectively protect the injection molded part, improve the injection molding quality, and is conducive to its widespread use.

[0012] 2. By setting both threaded and internal threads, the threads and internal threads can cooperate with each other, which facilitates easy assembly and disassembly between the fixed mold and the round tube, thus enabling convenient replacement during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main cross-sectional structure of an injection mold ejection structure according to an embodiment of this application;

[0014] Figure 2 This is an example of an injection mold ejection structure in the embodiments of this application. Figure 1 Enlarged schematic diagram of part A in the middle;

[0015] Figure 3 This is a schematic cross-sectional view of the air pipe structure of an injection mold ejection structure in an embodiment of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Fixed mold; 2. Moving mold; 3. Connecting block; 4. Connecting rod; 5. Mounting plate; 6. Electric push rod; 7. Round tube; 8. Air pipe; 9. Spring; 10. Rubber ring. Detailed Implementation

[0017] The following will be combined with the appendix Figure 1-3 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] This application discloses an ejection structure for an injection mold, referring to... Figure 1-3The system includes a fixed mold 1 and a moving mold 2, which engage with each other. Connecting blocks 3 are fixedly connected to both sides of the fixed mold 1. Connecting rods 4 are fixedly connected to the top of each of the four connecting blocks 3. A mounting plate 5 is fixedly connected to the top of each of the four connecting rods 4. An electric push rod 6 is fixedly connected to the center of the top of the mounting plate 5. The output shaft of the electric push rod 6 is fixedly connected to the top of the moving mold 2. A mounting hole is provided on the bottom side of the fixed mold 1. A round tube 7 is installed on the inner wall of the mounting hole. An air pipe 8 is slidably connected to the inner wall of the round tube 7. The inner diameter of the upper half of the round tube 7 is smaller than that of the lower half. Multiple vent holes are provided on the outer wall of the air pipe 8. An injection hole is provided on the right side of the fixed mold 1. By setting the round tube 7 and... The output shaft of the air pipe 8 and the electric push rod 6 drives the moving mold 2 to move downwards and engage with the fixed mold 1, injecting the injection material into the fixed mold 1 through the injection hole to complete the injection molding operation. When demolding is completed, the external air pump is connected to the round pipe 7. Under the action of air pressure, the air pipe 8 will be raised by one centimeter, creating a gap between the injection molded part and the fixed mold 1. At this time, as air is continuously pumped in, air will be continuously pumped into the fixed mold 1 through the vent hole. Under the action of continuous air injection, the injection molded part will gradually separate from the fixed mold 1, thereby achieving the purpose of flexible demolding. Compared with rigid demolding, it can effectively protect the injection molded part, improve the injection molding quality, and is conducive to its widespread use.

[0019] In this application, the inner wall of the mounting hole is provided with an internal thread, and the outer side of the round tube 7 is provided with an external thread. The thread and the internal thread are connected to each other. By providing the thread and the internal thread, the thread and the internal thread cooperate with each other, which facilitates the easy disassembly and assembly between the fixed mold 1 and the round tube 7, thereby enabling convenient replacement during use.

[0020] In this application, a spring 9 is fixedly connected to the inner wall of the top side of the round tube 7, and the spring 9 is fixedly connected to the air pipe 8. By setting the spring 9, when the external air pump is not used during the injection molding process, the rebound force of the spring 9 can make the air pipe 8 always be subjected to a downward thrust, thereby ensuring that the top surface of the air pipe 8 and the bottom inner wall of the fixed mold 1 are at the same level during the injection molding process, so as to avoid affecting the normal progress of the injection molding process.

[0021] In this application, a rubber ring 10 is fixedly sleeved on the outside of the circular tube 7; by setting the rubber ring 10, when the external air pump is connected to the circular tube 7, the rubber ring 10 can improve the sealing of the connection between the two and avoid air leakage.

[0022] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0023] The implementation principle of the injection mold ejection structure in this embodiment is as follows: During use, the output shaft of the electric push rod 6 drives the moving mold 2 to move downward and engage with the fixed mold 1, injecting the injection material into the fixed mold 1 through the injection hole to complete the injection molding operation. When demolding is performed after injection molding, the external air pump is connected to the round pipe 7. Under the action of air pressure, the air pipe 8 will be raised by one centimeter, creating a gap between the injection molded part and the fixed mold 1. At this time, as air is continuously pumped in, air will be continuously pumped into the fixed mold 1 through the vent hole. Under the action of continuous air injection, the injection molded part will gradually separate from the fixed mold 1, thereby achieving the purpose of flexible demolding. Compared with rigid demolding, it can have... Effective protection for injection molded parts, improved injection quality, and facilitated widespread use. The interlocking of the threads and internal threads allows for easy assembly and disassembly between the fixed mold 1 and the round tube 7, facilitating replacement during use. During injection molding, when the external air pump is not in use, the rebound force of the spring 9 ensures that the air pipe 8 is always subjected to a downward thrust, thus ensuring that the top surface of the air pipe 8 is level with the bottom inner wall of the fixed mold 1 during injection molding, preventing any disruption to the normal operation of the injection molding process. When the external air pump and the round tube 7 are connected, the rubber ring 10 improves the sealing of the connection between them, preventing air leakage.

[0024] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0025] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. An ejection structure for an injection mold, comprising a fixed mold (1) and a moving mold (2), characterized in that, The fixed mold (1) and the moving mold (2) are engaged. Connecting blocks (3) are fixedly connected to both the left and right sides of the fixed mold (1). Connecting rods (4) are fixedly connected to the top sides of the four connecting blocks (3). The top of the four connecting rods (4) is fixedly connected to the same mounting plate (5). An electric push rod (6) is fixedly connected to the center of the top side of the mounting plate (5). The output shaft of the electric push rod (6) is fixedly connected to the top side of the moving mold (2). The bottom side of the fixed mold (1) is provided with a mounting hole. A round tube (7) is installed on the inner wall of the mounting hole. An air pipe (8) is slidably connected to the inner wall of the round tube (7). The inner diameter of the upper half of the round tube (7) is smaller than that of the lower half. Multiple air vents are provided on the outer wall of the air pipe (8). An injection hole is provided on the right side of the fixed mold (1).

2. The ejection structure of an injection mold according to claim 1, characterized in that: The inner wall of the mounting hole is provided with an internal thread, and the outer side of the round tube (7) is provided with an external thread, which is threadedly connected to the internal thread.

3. The ejection structure of an injection mold according to claim 1, characterized in that: A spring (9) is fixedly connected to the inner wall of the top side of the round tube (7), and the spring (9) is fixedly connected to the air tube (8).

4. The ejection structure of an injection mold according to claim 1, characterized in that: A rubber ring (10) is fixedly sleeved on the outside of the round tube (7).

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