Ejection structure for preventing product deformation

Abstract

The utility model discloses a kind of ejection structure for preventing product deformation, it is related to mould technical field, including lower mould, the top of lower mould is provided with mould cavity;The bottom of lower mould is provided with gas cavity, the top of gas cavity is provided with operating cavity, the top of operating cavity is provided with through slot, operating cavity is communicated with mould cavity by through slot, and the length and width of operating cavity are respectively greater than the length and width of through slot, and sealing block is slidably arranged in the inside of through slot;When piston block moves upward, sealing block is driven to move downward by transmission assembly.The ejection structure for preventing product deformation, by setting sealing block, piston block and transmission assembly and the like structure, the position of sealing block is controlled, the integrity of mould cavity can be guaranteed, at the same time, piston block promotes gas to enter mould cavity from through slot, extrusion jacking is carried out to forming workpiece using gas, and gas penetrates between workpiece and mould cavity, auxiliary workpiece and mould cavity are separated, flexible stripping is realized, and the use efficiency of mould is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an ejection structure that prevents product deformation. Background Technology

[0002] After molding, the workpiece needs to be removed from the mold cavity. In the existing technology, the workpiece is usually demolded by manually pulling it, which has low demolding efficiency.

[0003] Therefore, it is necessary to propose an ejection structure to prevent product deformation in order to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an ejection structure that prevents product deformation, thereby solving the problem that the demolding efficiency is low in the prior art, which usually involves manually pulling the workpiece to demold.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ejection structure to prevent product deformation, comprising a lower mold, wherein a mold cavity is provided at the top of the lower mold;

[0006] The bottom of the lower mold has an air cavity, the top of the air cavity has an operating cavity, the top of the operating cavity has a through groove, the operating cavity is connected to the mold cavity through the through groove, and the length and width of the operating cavity are greater than the length and width of the through groove, and a sealing block is slidably arranged inside the through groove.

[0007] A piston block is slidably disposed inside the air chamber;

[0008] When the piston block moves upward, it drives the sealing block to move downward through the transmission assembly, opening the through groove. At the same time, the piston block pushes the gas through the through groove into the mold cavity.

[0009] Preferably, the transmission assembly includes a round rod, a gear, a first rack, and a second rack. The round rod is fixedly connected to the inner wall of the operating cavity, the gear is rotatably connected to the round rod, the first rack and the second rack are both disposed inside the operating cavity, and the first rack and the second rack are both meshed with the gear. The first rack and the second rack are respectively distributed on both sides of the gear. The sealing block is fixedly connected to the top of the first rack, and the piston block is fixedly connected to the bottom of the second rack.

[0010] Preferably, a first sliding groove is provided on the inner wall of the operating cavity, and a first slider is slidably disposed inside the first sliding groove, and the first slider is fixedly connected to the first rack.

[0011] Preferably, a second sliding groove is provided on the inner wall of the operating cavity, and a second slider is slidably disposed inside the second sliding groove, and the second slider is fixedly connected to the second rack.

[0012] Preferably, an upper mold is provided above the lower mold.

[0013] Preferably, the lower mold and the upper mold are fixed together by a locking component.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model, by setting up a sealing block, a piston block and a transmission assembly, controls the position of the sealing block to ensure the integrity of the mold cavity. At the same time, the piston block pushes gas into the mold cavity through the through groove, and uses the gas to squeeze and lift the molded workpiece. The gas also penetrates between the workpiece and the mold cavity to assist in the separation of the workpiece and the mold cavity, realizes flexible demolding, prevents the workpiece from deforming, and improves the efficiency of mold use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the ejection structure of this utility model to prevent product deformation.

[0017] Figure 2 This is a cross-sectional view of the ejection structure of the present invention to prevent product deformation.

[0018] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Lower mold; 2. Upper mold; 3. Air cavity; 4. Operating cavity; 5. Through groove; 6. Sealing block; 7. Round rod; 8. Gear; 9. First rack; 10. First slide groove; 11. First slider; 12. Second rack; 13. Second slide groove; 14. Second slider; 15. Piston block; 16. Locking element; 17. Mold cavity. Detailed Implementation

[0020] This utility model provides, for example Figures 1-3 The ejection structure shown includes a lower mold 1 with a mold cavity 17 at its top. The lower mold 1 is fixedly mounted on a worktable. An upper mold 2 is located above the lower mold 1. A control component (not shown in the figure) that drives the upper mold 2 to move up and down is provided on the worktable. The control component includes structures such as an electric push rod. The fixed end of the electric push rod is fixedly connected to the worktable, and the upper mold 2 is fixedly connected to the telescopic end of the electric push rod. The upper mold 2 is provided with a liquid injection channel that cooperates with the mold cavity 17. Molten material is injected into the mold cavity 17 through the liquid injection channel. The electric push rod and the other components are connected to the factory's power supply.

[0021] The lower mold 1 and the upper mold 2 are fixed together by a locking component 16, which includes a positioning pin, a positioning plate and other structures, and can connect and lock the lower mold 1 and the upper mold 2.

[0022] To achieve rapid demolding, an air cavity 3 is provided at the bottom of the lower mold 1, and a piston block 15 is slidably disposed inside the air cavity 3. An electric push rod is installed on the worktable, with its fixed end fixedly connected to the worktable. The piston block 15 is fixedly connected to the telescopic end of the electric push rod, and a sealing ring is provided between the outer wall of the piston block 15 and the inner wall of the air cavity 3 to ensure sealing. The electric push rod drives the piston block 15 to move up and down inside the air cavity 3.

[0023] An operating cavity 4 is provided at the top of the air cavity 3, and a through groove 5 is provided at the top of the operating cavity 4. The operating cavity 4 is connected to the mold cavity 17 through the through groove 5, and the length and width of the operating cavity 4 are greater than the length and width of the through groove 5. A sealing block 6 is slidably arranged inside the through groove 5. During the molding operation, the sealing block 6 closes the through groove 5 without affecting the molding of the workpiece. During demolding, the sealing block 6 moves downward completely into the operating cavity 4, the through groove 5 opens, and the operating cavity 4 is connected to the mold cavity 17 through the through groove 5. The thickness of the through groove 5 is small.

[0024] A transmission assembly is provided between the sealing block 6 and the piston block 15. The transmission assembly includes a round rod 7, a gear 8, a first rack 9, and a second rack 12. The round rod 7 is fixedly connected to the inner wall of the operating cavity 4. The gear 8 is rotatably connected to the round rod 7. The first rack 9 and the second rack 12 are both located inside the operating cavity 4. The first rack 9 and the second rack 12 are both meshed with the gear 8. The first rack 9 and the second rack 12 are respectively distributed on both sides of the gear 8. The sealing block 6 is fixedly connected to the top of the first rack 9, and the piston block 15 is fixedly connected to the bottom of the second rack 12.

[0025] When the piston block 15 drives the second rack 12 to move downwards, refer to... Figure 3 Gear 8 rotates counterclockwise, and the first rack 9 drives the sealing block 6 to move upward.

[0026] Before the molding operation, the lower mold 1 is not placed on top of the upper mold 2. The piston block 15 is located at the top of the air cavity 3 and the through groove 5 is in the open state. Then, the piston block 15 is controlled to move downward to generate suction. External gas enters the operating cavity 4 from the mold cavity 17 and the through groove 5 until the sealing block 6 closes the through groove 5. Since the thickness of the through groove 5 is small, the sealing block 6 closes the through groove 5 instantly, ensuring stable air intake in the previous step. This allows the operating cavity 4 to store more gas, which is convenient for subsequent flexible demolding using gas.

[0027] In addition, the sealing block 6 can use the same material as the lower mold 1. At the same time, the inner wall of the through groove 5 and the outer wall of the sealing block 6 are both machined with high precision and have smooth surfaces, ensuring that the sealing block 6 achieves a gapless fit when closing the through groove 5. The molten material will not seep into the space between the sealing block 6 and the through groove 5. Furthermore, the inner wall of the through groove 5 and the outer wall of the sealing block 6 can be inspected regularly, such as repaired or replaced, to ensure a stable fit at all times.

[0028] Furthermore, the residue in the mold cavity 17 has been cleaned, and no residue has entered the interior of the mold cavity 17; at the same time, the sealing block 6 closes the through groove 5 to ensure the integrity of the mold cavity 17; then the upper mold 2 is locked on the lower mold 1 for molding operation.

[0029] During demolding, after the upper mold 2 separates from the lower mold 1, the piston block 15 is controlled to move upward, which in turn moves the second rack 12 upward, as shown in the reference. Figure 3 When gear 8 rotates clockwise, the first rack 9 drives the sealing block 6 to move downwards, so that the sealing block 6 moves completely downwards into the operating cavity 4, the through groove 5 opens, and the operating cavity 4 is connected to the mold cavity 17 through the through groove 5; at the same time, the top of the through groove 5 is closed by the workpiece, and when the piston block 15 moves upwards, it will squeeze the gas in the air cavity 3 and the operating cavity 4, and push the gas into the mold cavity 17 through the through groove 5. The gas squeezes and lifts the molded workpiece, and the gas penetrates between the workpiece and the mold cavity 17, assisting the workpiece to separate from the mold cavity 17, realizing flexible demolding. Compared with direct ejection, it can prevent the workpiece product from deforming.

[0030] This invention, by setting up a sealing block 6, a piston block 15, and a transmission assembly, controls the position of the sealing block 6, ensuring the integrity of the mold cavity 17. At the same time, the piston block 15 pushes gas into the mold cavity 17 through the through groove 5, using the gas to squeeze and lift the molded workpiece. The gas also penetrates between the workpiece and the mold cavity 17, assisting in the separation of the workpiece from the mold cavity 17, achieving flexible demolding, preventing workpiece deformation, and improving the efficiency of mold use.

[0031] A first groove 10 is provided on the inner wall of the operating cavity 4. A first slider 11 is slidably disposed inside the first groove 10. The first slider 11 is fixedly connected to the first rack 9. Both the first groove 10 and the first slider 11 are T-shaped. By setting the first groove 10 and the first slider 11, the first slider 11 moves synchronously when the first rack 9 moves, thereby improving the stability of the first rack 9 in use.

[0032] A second slide groove 13 is provided on the inner wall of the operating cavity 4. A second slider 14 is slidably disposed inside the second slide groove 13 and is fixedly connected to the second rack 12. Both the second slide groove 13 and the second slider 14 are T-shaped. By setting the second slide groove 13 and the second slider 14, the second rack 12 moves synchronously with the second slider 14, thereby improving the stability of the second rack 12 in use.

Claims

1. An ejection structure for preventing product deformation, comprising a lower mold (1), characterized in that: The lower mold (1) has a mold cavity (17) at its top. The bottom of the lower mold (1) is provided with an air cavity (3), the top of the air cavity (3) is provided with an operating cavity (4), the top of the operating cavity (4) is provided with a through groove (5), the operating cavity (4) is connected to the mold cavity (17) through the through groove (5), and the length and width of the operating cavity (4) are greater than the length and width of the through groove (5), and a sealing block (6) is slidably provided inside the through groove (5). A piston block (15) is slidably disposed inside the air chamber (3); When the piston block (15) moves upward, it drives the sealing block (6) to move downward through the transmission assembly, the through groove (5) opens, and at the same time the piston block (15) pushes the gas through the through groove (5) into the mold cavity (17).

2. The ejection structure for preventing product deformation according to claim 1, characterized in that: The transmission assembly includes a round rod (7), a gear (8), a first rack (9) and a second rack (12). The round rod (7) is fixedly connected to the inner wall of the operating cavity (4). The gear (8) is rotatably connected to the round rod (7). The first rack (9) and the second rack (12) are both located inside the operating cavity (4). The first rack (9) and the second rack (12) are both meshed with the gear (8). The first rack (9) and the second rack (12) are respectively distributed on both sides of the gear (8). The sealing block (6) is fixedly connected to the top of the first rack (9). The piston block (15) is fixedly connected to the bottom of the second rack (12).

3. The ejection structure for preventing product deformation according to claim 2, characterized in that: The inner wall of the operating cavity (4) is provided with a first sliding groove (10), and a first slider (11) is slidably arranged inside the first sliding groove (10). The first slider (11) is fixedly connected to the first rack (9).

4. The ejection structure for preventing product deformation according to claim 2, characterized in that: The inner wall of the operating cavity (4) is provided with a second sliding groove (13), and a second slider (14) is slidably arranged inside the second sliding groove (13). The second slider (14) is fixedly connected to the second rack (12).

5. The ejection structure for preventing product deformation according to claim 1, characterized in that: An upper mold (2) is provided above the lower mold (1).

6. The ejection structure for preventing product deformation according to claim 5, characterized in that: The lower mold (1) and the upper mold (2) are fixed together by a locking member (16).

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