Injection mold with ejection demolding structure

Abstract

The injection mold with the ejection demolding structure comprises a base, a fixed injection mold is installed at the top of the base, an injection cavity is formed in the top of the fixed injection mold, a movable injection mold is further arranged at the top of the fixed injection mold, and positioning pins are arranged at the corners of the bottom of the movable injection mold. According to the injection molding device, the controller is used for controlling, the air pumps convey air into the air hammers and the air inlet heads, the air hammers drive the force transmission plates and the rubber blocks to knock the inner wall of an injection molding cavity, the inner wall of the injection molding cavity is knocked through the air pumps, the inner wall of the injection molding cavity is knocked through the rubber blocks, and therefore the injection molding cavity is formed. And air drives movable blocks to move to extrude first springs through air outlet holes formed in the tops of the two ends of an air inlet through groove, an ejector rod drives a first ejector block to eject the loosened injection molding part in the injection molding cavity, and demolding of the injection molding part is more convenient.

Description

Technical Field

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

[0002] Injection molds, as key tools in the production of plastic products, occupy a pivotal position in modern manufacturing. They not only give plastic products a complete structure but also ensure their precise dimensions. The specific process of injection molding involves injecting molten plastic into the mold cavity under high pressure through an injection molding machine, and then cooling and solidifying it to obtain the molded product.

[0003] However, some existing injection molds have relatively simple demolding structures, which only use electric cylinders or hydraulic cylinders to drive the ejector pins to move upwards to eject the injection molded parts. However, during the ejection process, when the injection molded parts are tightly attached to the inner wall of the injection cavity, it is not easy for the electric cylinders or hydraulic cylinders to drive the ejector pins to eject the injection molded parts, and the inner wall of the injection molded parts is easily damaged during the ejection process. Utility Model Content

[0004] To address the problems mentioned in the background art, this application provides an injection mold with an ejection and demolding structure.

[0005] The injection mold with an ejection and demolding structure provided in this application adopts the following technical solution:

[0006] An injection mold with an ejector demolding structure includes a base, a fixed injection mold mounted on the top of the base, an injection cavity provided on the top of the fixed injection mold, first ejector demolding structures provided at both ends of the fixed injection mold, a second ejector demolding structure provided between the bottom of the fixed injection mold and the top of the base, a moving injection mold also provided on the top of the fixed injection mold, a locating pin provided at a corner of the bottom of the moving injection mold, the locating pin being adapted to a locating hole provided at the corner of the top of the fixed injection mold, and two air pumps provided at both ends of the base.

[0007] Preferably, the first ejection and demolding structure includes two sets of air hammers fixed to the side walls at both ends of the injection mold. One end of each set of air hammers penetrates into a cavity opened inside the injection mold, and one end of each air hammer is also connected to a force transmission plate provided inside the cavity.

[0008] Preferably, the force transmission plate is provided with sliding blocks at both ends, the sliding blocks slide on two sliding rods provided on the inner wall of the cavity, and a rubber block is also provided on one side of the force transmission plate.

[0009] Preferably, the other end of the two sets of air hammers is provided with a first air supply pipe, the other end of the first air supply pipe is connected to the top of the air pump, the top of the air pump is also connected to a second air supply pipe, the connection points of the first air supply pipe, the second air supply pipe and the air pump are respectively provided with controllers, and the other end of the second air supply pipe is also connected to the air inlet head provided on both ends of the injection mold.

[0010] Preferably, the other end of the air inlet head is connected to an air inlet channel provided inside the injection mold. Air outlet holes are provided at the top of both ends of the air inlet channel. A movable cavity is provided at the top of the air outlet hole, and a movable block is provided inside the movable cavity.

[0011] Preferably, a top rod is installed on the top of the movable block, and a first spring is also provided on the top of the movable block. The other end of the first spring is connected to the top surface of the movable cavity, and the other end of the top rod extends out of the movable cavity and is connected to a first top block installed in a circular groove provided on the bottom surface of the injection cavity.

[0012] Preferably, the second ejection and demolding structure includes an electric cylinder installed on the top of the base and the bottom of the injection mold. The output end of the electric cylinder passes through a through groove opened between the injection mold and the mold, and is connected to a fixed plate disposed inside the through groove.

[0013] Preferably, the top of the fixing plate is provided with a plurality of spring rods, and the top of the spring rods is provided with a second top block.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. This utility model is equipped with a first ejection demolding structure. The controller controls the air pump to deliver gas into the air hammer, which drives the rubber block on one side of the force transmission plate to strike the inner wall of the injection mold cavity, causing the injection mold to vibrate and loosen the injection molded part for easy demolding. Then, the controller controls the air pump to deliver gas into the air inlet head. The gas drives the movable block to move through the air outlet holes at the top of both ends of the air inlet slot, which squeezes the first spring. The ejector rod drives the first ejector block to lift the loose injection molded part in the injection cavity, making the demolding of the injection molded part more convenient.

[0016] 2. The second ejection and demolding structure of this utility model drives the electric cylinder to move the fixed plate upward along the through groove opened in the middle of the injection mold, so that the second ejector block connected to the top of the fixed plate through the spring rod can lift the injection molded part upward, thereby realizing the secondary ejection and demolding of the injection molded part, preventing the first ejection and demolding from being incomplete, thus improving the practical performance. At the same time, the second ejector block has a certain elasticity under the action of the spring rod, avoiding damage to the injection molded part when it is lifted. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of an injection mold with an ejection and demolding structure according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the top structure of the injection mold in an embodiment of this application;

[0019] Figure 3 This is an enlarged schematic diagram of the structure at point A in the embodiment of this application;

[0020] Figure 4 This is a side sectional view of the internal structure of the injection mold in the embodiments of this application;

[0021] Figure 5 This is an enlarged schematic diagram of the structure at point B in the embodiment of this application;

[0022] Figure 6 This is a front sectional view of the internal structure of the injection mold in the embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Base; 2. Fixed injection mold; 3. Moving injection mold; 4. Injection cavity; 5. Air pump; 6. Air hammer; 7. Force transmission plate; 8. Sliding block; 9. Sliding rod; 10. Rubber block; 11. First air supply pipe; 12. Second air supply pipe; 13. Air inlet head; 14. Air inlet channel; 15. Movable block; 16. Ejector rod; 17. First spring; 18. First ejector block; 19. Electric cylinder; 20. Fixed plate; 21. Spring rod; 22. Second ejector block. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 —6 provides further detailed description of this application.

[0025] This application discloses an injection mold with an ejection and demolding structure, including a base 1, an injection mold 2 mounted on the top of the base 1, an injection cavity 4 provided on the top of the injection mold 2, first ejection and demolding structures provided at both ends of the injection mold 2, a second ejection and demolding structure provided at the bottom of the injection mold 2 between the top and bottom of the base 1, an injection moving mold 3 also provided on the top of the injection mold 2, a positioning pin provided at the corner of the bottom of the injection moving mold 3, the positioning pin being adapted to the positioning hole provided at the corner of the top of the injection mold 2, and two air pumps 5 provided at both ends of the base 1.

[0026] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5The first ejection and demolding structure includes two sets of air hammers 6 fixed to the side walls at both ends of the injection mold 2. One end of each air hammer 6 penetrates into a cavity inside the injection mold 2. Another end of each air hammer 6 is connected to a force transmission plate 7 installed inside the cavity. Sliding blocks 8 are installed at both ends of the force transmission plate 7, sliding on two sliding rods 9 installed on the inner wall of the cavity. A rubber block 10 is also installed on one side of the force transmission plate 7. A first air supply pipe 11 is installed at the other end of each air hammer 6. The other end of the first air supply pipe 11 is connected to the top of an air pump 5. A second air supply pipe 12 is also connected to the top of the air pump 5. Controllers are respectively installed at the connection points of the first air supply pipe 11 and the second air supply pipe 12 with the air pump 5. The other end of the second air supply pipe 12 is also connected to the air inlet head 13 provided on the end walls of the injection mold 2. The other end of the air inlet head 13 is connected to the air inlet channel 14 provided inside the injection mold 2. Air outlet holes are opened at the top of both ends of the air inlet channel 14. A movable cavity is provided at the top of the air outlet hole. A movable block 15 is provided inside the movable cavity. A push rod 16 is installed on the top of the movable block 15. A first spring 17 is also provided on the top of the movable block 15. The other end of the first spring 17 is connected to the top of the movable cavity. The other end of the ejector rod 16 extends out of the movable cavity and connects with the first ejector block 18 installed in the circular groove on the bottom surface of the injection cavity 4. More specifically, the controller controls the air pump 5 to deliver gas through the first air supply pipe 11 to the air hammers 6 fixedly installed at both ends of the injection mold 2. The air hammers 6 work to drive the force transmission plate 7 connected at one end to slide along the slide rod 9 through the sliding blocks 8 set at both ends. The force transmission plate 7 drives the rubber block 10 to strike the inner wall of the cavity of the injection mold 2, causing the injection mold 2 to vibrate, thereby loosening the injection molded part in the injection cavity 4. To facilitate demolding, the rubber block 10 prevents the force transmission plate 7 from directly striking the injection mold 2 and causing damage. Then, through the controller, the air pump 5 delivers gas through the second air pipe 12 to the air inlet head 13 and into the air inlet channel 14. The gas, through the air outlets at the top of both ends of the air inlet channel 14, drives the movable block 15 inside the movable cavity to move upward and squeeze the first spring 17. It also drives the top ejector rod 16 to move upward, so that the ejector rod 16 drives the first ejector block 18 at the top to lift the loose injection molded part in the injection cavity 4, making demolding of the injection molded part more convenient.

[0027] refer to Figure 6The second ejection and demolding structure includes an electric cylinder 19 installed on the top of the base 1 and the bottom of the injection mold 2. The output end of the electric cylinder 19 passes through a through slot opened in the middle of the injection mold 2 and is connected to a fixed plate 20 inside the through slot. The top of the fixed plate 20 is provided with several spring rods 21, and the top of the spring rods 21 is provided with a second ejector block 22. More specifically, by driving the electric cylinder 19, the fixed plate 20 connected to the output end moves upward along the through slot opened in the middle of the injection mold 2, so that the second ejector block 22 connected to the top of the fixed plate 20 through the spring rods 21 can lift the injection molded part upward, thereby realizing a second ejection and demolding of the injection molded part, preventing the first ejection and demolding from being incomplete, and thus improving the practical performance.

[0028] The implementation principle of an injection mold with an ejection and demolding structure according to an embodiment of this application is as follows: During use, injection molding is performed by closing the moving mold 3 and the fixed mold 2. When demolding the molded part, the controller controls the air pump 5 to deliver gas through the first air supply pipe 11 to the inside of the air hammer 6. The air hammer 6 drives the force transmission plate 7 to slide along the slide rod 9 through the sliding block 8, and drives the rubber block 10 to strike the inner wall of the cavity of the fixed mold 2, causing the fixed mold 2 to vibrate, thereby loosening the molded part and facilitating demolding. The rubber block 10 can prevent the force transmission plate 7 from directly striking the fixed mold 2 and causing damage. Then, the controller controls the air pump 5 to deliver gas through the second air supply pipe 12 to the air inlet head 13. The gas drives the moving cavity through the air outlet holes opened at the top of both ends of the air inlet groove 14. The internal movable block 15 moves upward to compress the first spring 17, and drives the top ejector rod 16 to move upward, so that the ejector rod 16 drives the top first ejector block 18 to lift the loose injection molded part in the injection cavity 4, making the demolding of the injection molded part more convenient. When the first ejector block 18 cannot lift the injection molded part completely, the drive electric cylinder 19 drives the fixed plate 20 to move upward along the through groove opened in the middle position of the injection mold 2, so that the second ejector block 22 connected to the top of the fixed plate 20 through the spring rod 21 can lift the injection molded part upward, thereby realizing the secondary ejection and demolding of the injection molded part, preventing the first ejection and demolding from being incomplete, thereby improving the practical performance. At the same time, the second ejector block 22 has a certain elasticity under the action of the spring rod 21, avoiding damage when lifting the injection molded part.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold with an ejection and demolding structure, comprising a base (1), wherein a fixed injection mold (2) is mounted on the top of the base (1), characterized in that: The top of the injection mold (2) is provided with an injection cavity (4), the two ends of the injection mold (2) are provided with a first ejection demolding structure, the bottom of the injection mold (2) is provided with a second ejection demolding structure between the top of the base (1), the top of the injection mold (2) is also provided with an injection moving mold (3), the bottom of the injection moving mold (3) is provided with a positioning pin at the corner position, the positioning pin is adapted to the positioning hole provided at the corner position of the top of the injection mold (2), and the two ends of the base (1) are also provided with two air pumps (5).

2. The injection mold with an ejection and demolding structure according to claim 1, characterized in that: The first ejection demolding structure includes two sets of air hammers (6) fixed on the side walls at both ends of the injection mold (2). One end of each set of air hammers (6) penetrates into a cavity opened inside the injection mold (2), and one end of each air hammer (6) is also connected to a force transmission plate (7) provided inside the cavity.

3. An injection mold with an ejection and demolding structure according to claim 2, characterized in that: The force transmission plate (7) is provided with sliding blocks (8) at both ends. The sliding blocks (8) slide on two sliding rods (9) provided on the inner wall of the cavity. A rubber block (10) is also provided on one side of the force transmission plate (7).

4. An injection mold with an ejection and demolding structure according to claim 3, characterized in that: The other end of the two sets of air hammers (6) is provided with a first air supply pipe (11), the other end of the first air supply pipe (11) is connected to the top of the air pump (5), the top of the air pump (5) is also connected with a second air supply pipe (12), the connection between the first air supply pipe (11), the second air supply pipe (12) and the air pump (5) is respectively provided with a controller, and the other end of the second air supply pipe (12) is also connected to the air inlet head (13) provided on both ends of the injection mold (2).

5. An injection mold with an ejection and demolding structure according to claim 4, characterized in that: The other end of the air inlet head (13) is connected to the air inlet channel (14) provided inside the injection mold (2). The top of both ends of the air inlet channel (14) are provided with air outlet holes. The top of the air outlet holes is provided with a movable cavity. The movable cavity is provided with a movable block (15).

6. An injection mold with an ejection and demolding structure according to claim 5, characterized in that: A top rod (16) is installed on the top of the movable block (15), and a first spring (17) is also provided on the top of the movable block (15). The other end of the first spring (17) is connected to the top surface of the movable cavity. The other end of the top rod (16) passes through the movable cavity and is connected to the first top block (18) installed in the circular groove provided on the bottom surface of the injection cavity (4).

7. An injection mold with an ejection and demolding structure according to claim 1, characterized in that: The second ejection demolding structure includes an electric cylinder (19) installed on the top of the base (1) and the bottom of the injection mold (2). The output end of the electric cylinder (19) passes through a through groove opened in the middle of the injection mold (2) and is connected to a fixing plate (20) provided inside the through groove.

8. An injection mold with an ejection and demolding structure according to claim 7, characterized in that: The top of the fixing plate (20) is provided with a plurality of spring rods (21), and the top of the spring rods (21) is provided with a second top block (22).

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