Injection molding apparatus for airtight plastic parts

Abstract

The application discloses an injection mold forming mechanism for airtight plastic parts, which comprises a heating cylinder, an injection head arranged on one side of the heating cylinder, a partition plate arranged on one side of the injection head, a fixing block arranged on the side of the partition plate away from the injection head, a forming groove arranged on the fixing block, a positioning plate arranged on the side of the partition plate away from the heating cylinder, a horizontal plate and a fixing rod fixedly arranged between the positioning plate and the partition plate, an injection assembly slidingly arranged on the fixing rod, a rotating shaft rotatably connected to the horizontal plate, a rotating disc fixedly sleeved to the outer side of the rotating shaft, a plurality of groups of material receiving assemblies arranged in an annular array on the rotating disc, and a material discharging assembly arranged on one side of the material receiving assembly. The injection mold forming mechanism for airtight plastic parts can realize the forming and discharging of the plastic parts through the movement of the moving block in two directions, and the material receiving assembly can receive the demolded plastic parts without damaging the plastic parts.

Description

Technical Field

[0001] This invention relates to the field of plastic injection molding technology, specifically to an injection mold forming mechanism for airtight plastic parts. Background Technology

[0002] Plastic injection molding is a plastic processing method in which plastic is plasticized in the heated barrel of an injection molding machine and then injected into the mold cavity of a closed mold by a plunger or reciprocating screw to form a product. This method can process products with complex shapes, precise dimensions, or inserts, and has high production efficiency. Most thermoplastic plastics and some thermosetting plastics (such as phenolic plastics) can be processed by this method. The material used for injection molding must have good flowability in order to fill the mold cavity to obtain the product.

[0003] Chinese Patent Publication No. CN115366379A discloses a plastic injection molding machine. In this design, the first movable block moves downward, which drives the arc plate to push the water storage bag to accelerate drainage. During the downward movement of the first movable block, the extrusion block moves inward at the same time. In this way, the high-pressure gas inside the air inlet pipe pushes the plastic bottle to fall, which makes it easier to demold the parts formed in the injection mold.

[0004] In traditional manufacturing, a storage box is placed under the mold to catch the parts falling after demolding. Although this method uses the force generated by high-pressure gas to demold the parts formed in the injection mold, it lacks protection for the demolded parts. If the parts are heavy, the impact force from falling after demolding can cause some damage to the parts themselves. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold forming mechanism for airtight plastic parts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection mold forming mechanism for an airtight plastic part, comprising a heating cylinder, an injection head disposed on one side of the heating cylinder, a partition disposed on one side of the injection head, a fixing block disposed on the side of the partition away from the injection head, a forming groove being formed on the fixing block, a positioning plate disposed on the side of the partition away from the heating cylinder, a horizontal plate and a fixing rod fixedly disposed between the positioning plate and the partition, an injection molding component slidably disposed on the fixing rod, a rotating shaft rotatably connected to the horizontal plate, a turntable fixedly sleeved on the outside of the rotating shaft, multiple sets of receiving components arranged in a circular array on the turntable, and a feeding component disposed on one side of the receiving components.

[0007] As a further embodiment of the present invention: the injection molding assembly includes a movable block, the movable block being slidably connected to the fixed rod, a groove being provided in the movable block, a positioning frame being fixedly provided on the side of the movable block away from the fixed block, a movable rod being movably provided on the side of the positioning frame away from the movable block, an extrusion frame being fixedly connected on the side of the movable rod away from the positioning plate, one side of the extrusion frame being slidably connected to the movable block, and a first spring being fixedly provided between the extrusion frame and the movable block.

[0008] As a further aspect of the present invention: the receiving assembly includes a fixed frame, the fixed frame is fixedly connected to the turntable, a cylinder is provided at the bottom of the fixed frame, a lifting rod is slidably arranged inside the cylinder, a receiving plate is fixedly connected to the side of the lifting rod away from the cylinder, and a second spring is fixedly connected between the receiving plate and the turntable.

[0009] As a further embodiment of the present invention: a notch is provided on one side of the moving block, a pressure plate is provided above the turntable, the pressure plate is fixedly connected to the positioning plate, and an inclined groove is provided at the bottom of the pressure plate, the inclined groove being drivenly connected to the receiving plate.

[0010] As a further embodiment of the present invention: a first gear is fixedly sleeved on the outer side of the rotating shaft, a fixed ring is fixedly disposed on the first gear, the inner side of the fixed ring is serrated, a third spring is fixedly disposed on the outer side of the rotating shaft, a serrated block is fixedly connected to the side of the third spring away from the rotating shaft, the serrated block is drivingly connected to the serrated part of the inner side of the fixed ring, and a first rack is fixedly connected below the fixed block, the first rack meshes with the first gear for transmission.

[0011] As a further embodiment of the present invention: the feeding assembly includes a top rod, one end of which movably passes through the side plate of the fixed frame, and a fixed frame is movably sleeved and connected to the outer side of the top rod away from the fixed frame. The fixed frame is fixedly connected to the turntable, and a circular groove is formed in the fixed frame. The top rod is movably connected to the circular groove. A vertical groove is formed on the fixed frame, and the vertical groove communicates with the circular groove. A limiting rod is movably arranged in the vertical groove. A fourth spring is fixedly connected between the bottom of the limiting rod and the vertical groove. A limiting groove is formed at the top of the limiting rod. A limiting ring is fixedly sleeved on the outer side of the top rod. A fifth spring is arranged on the side of the limiting ring away from the fixed frame. The limiting ring is movably engaged with the limiting groove.

[0012] As a further embodiment of the present invention: a cylinder is slidably disposed on the outer side of the top rod away from the fixed frame; the fifth spring is fixed between the limiting ring and the cylinder; the cylinder is slidably connected to the circular groove and one side is located outside the fixed frame; a sixth spring is fixedly connected between the cylinder and the fixed frame; a slanted opening is provided at the center of the limiting rod; a crossbar is movably disposed in the slanted opening; the crossbar movably passes through the fixed frame and a fixed plate is fixedly connected to its end; the fixed plate is fixedly connected to the cylinder.

[0013] As a further aspect of the present invention: an arc-shaped block is provided above the turntable, the arc-shaped block is fixedly connected to the pressure plate, and the arc-shaped plate abuts against the cylindrical transmission.

[0014] As a further embodiment of the present invention: a block is fixedly sleeved on the outer side of the top rod, and a movable groove is opened on one side of the block. The movable groove is designed in an inclined shape. The end of the lifting rod away from the receiving plate moves through the turntable and is fixedly connected to a movable plate at its end. The movable plate is connected to the movable groove in a transmission manner.

[0015] As a further aspect of the present invention: a conveyor belt is provided on one side of the turntable, and the conveyor belt is fixedly connected to the horizontal plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the molding and unloading of plastic parts are achieved by the movement of the moving block in two directions. The receiving component can catch the plastic parts after demolding without damaging them. Secondly, the movement of the moving block will also drive the turntable to rotate and switch the receiving component, so that the empty receiving component can be rotated back to the bottom of the moving block to catch the next plastic part to be molded. During the rotation of the turntable, the unloading component will cooperate with the arc block to perform the unloading operation on the receiving component containing the plastic component. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 for Figure 1 Enlarged diagram of part A in the middle.

[0019] Figure 3 This is a schematic diagram of the injection molding component in this invention.

[0020] Figure 4 This is a schematic diagram of the groove structure in this invention.

[0021] Figure 5 This is a schematic diagram of the material receiving assembly in this invention.

[0022] Figure 6 This is a schematic diagram of the turntable structure in this invention.

[0023] Figure 7 This is a schematic diagram of the pressure plate in this invention.

[0024] Figure 8 This is a schematic diagram of the structure of the first gear in this invention.

[0025] Figure 9 This is a schematic diagram of the feeding assembly in this invention.

[0026] Figure 10 This is a schematic diagram of the moving groove in this invention.

[0027] Figure 11 This is a schematic diagram of the oblique opening in this invention.

[0028] Figure 12 This is a schematic diagram of the arc-shaped block in this invention.

[0029] In the diagram: 1. Heating cylinder; 2. Injection head; 3. Partition plate; 4. Fixing block; 41. Molding groove; 5. Positioning plate; 6. Injection molding assembly; 61. Moving block; 611. Notch; 62. Groove; 63. Positioning frame; 64. Moving rod; 65. Extrusion frame; 66. First spring; 7. Receiving assembly; 71. Fixing frame; 72. Cylinder; 73. Lifting rod; 74. Receiving plate; 75. Second spring; 8. Discharge assembly; 81. Top rod; 82. Fixing frame; 83. Circular groove; 84. Vertical groove; 85. Limiting rod; 851. Limiting groove; 852. Slanted opening; 86. Fourth spring; 87. Limiting ring; 88. Fifth spring; 9. Horizontal plate; 10. Fixing rod; 11. Rotating shaft; 12. Turntable; 13. Pressing plate; 131. Slanted groove; 14. First gear; 15. Fixing ring; 16. Third spring; 17. Sawtooth block; 18. First rack; 19. Cylinder; 20. Sixth spring; 21. Horizontal bar; 22. Fixing plate; 23. Arc-shaped block; 24. Square block; 241. Moving groove; 25. Moving plate; 26. Conveyor belt. Detailed Implementation

[0030] Please see Figures 1-12In this embodiment of the invention, an injection molding mechanism for an airtight plastic part includes a heating cylinder 1. An injection head 2 is disposed on one side of the heating cylinder 1, and a partition 3 is disposed on one side of the injection head 2. A fixing block 4 is disposed on the side of the partition 3 away from the injection head 2. A molding groove 41 is formed on the fixing block 4. A positioning plate 5 is disposed on the side of the partition 3 away from the heating cylinder 1. A horizontal plate 9 and a fixing rod 10 are fixedly disposed between the positioning plate 5 and the partition 3. An injection molding assembly 6 is slidably disposed on the fixing rod 10. A rotating shaft 11 is rotatably connected to the horizontal plate 9. A turntable 12 is fixedly sleeved on the outside of the rotating shaft 11. Multiple sets of receiving assemblies 7 are arranged in a circular array on the turntable 12. A feeding assembly 8 is disposed on one side of the receiving assembly 7. Raw materials are added to the heating cylinder 1 for heating and melting. The melted material is injected through the injection head 2 into the molding groove 41 formed on the fixing block 4 for cooling. After completion, the injection molding assembly 6 moves along the fixed rod 10. The cooled plastic part inside the injection molding assembly 6 is demolded from the injection molding assembly 6 and enters the receiving assembly 7 set on the turntable 12. When the plastic part is demolded, the receiving assembly 7 directly below the injection molding assembly 6 can catch the demolded plastic part and prevent the plastic part from falling and causing damage. When the receiving assembly 7 below the injection molding assembly 6 contains a plastic part, the rotating shaft 11 is rotated. The rotation of the rotating shaft 11 drives the turntable 12 to rotate, thereby rotating the receiving assembly 7 without plastic parts to the bottom of the injection molding assembly 6, so as to catch the demolded part after the next injection is completed. The receiving assembly 7 with demolded parts is rotated to one side and then the demolded parts placed inside are pushed away by the unloading assembly 8. This can ensure that the receiving assembly 7 is always in an empty state, which is convenient for catching the demolded plastic parts. The positioning plate 5, the horizontal plate 9 and the partition plate 3 all provide support.

[0031] See Figure 1 and Figures 3-4As shown, in this embodiment, preferably, the injection molding assembly 6 includes a movable block 61, which is slidably connected to the fixed rod 10. A groove 62 is formed in the movable block 61. A positioning frame 63 is fixedly mounted on the side of the movable block 61 away from the fixed block 4. A movable rod 64 is movably mounted on the side of the positioning frame 63 away from the movable block 61. An extrusion frame 65 is fixedly connected to the side of the movable rod 64 away from the positioning plate 5. One side of the extrusion frame 65 is slidably connected to the movable block 61. A first spring 66 is fixedly mounted between the extrusion frame 65 and the movable block 61. The molten raw material is cooled and molded within the groove 62 of the movable block 61 and the molding groove 41 of the fixed block 4. After the raw material is molded... The moving block 61 moves away from the fixed block 4 along the fixed rod 10. The movement of the moving block 61 drives the positioning frame 63, the moving rod 64 and the extrusion frame 65 to move together. When the moving rod 64 moves to abut against the positioning plate 5 and then continues to move, the moving rod 64 will move in the opposite direction, thereby driving the extrusion frame 65 to move towards the moving block 61, thus squeezing the plastic part formed in the groove 62 out of the range of the moving block 61. During this process, the first spring 66 is in a compressed state, and the plastic part squeezed out of the groove 62 opened by the moving block 61 will fall onto the receiving component 7 below. This step, by moving the moving block 61 away from the fixed block 4, drives the extrusion frame 65 to demold the plastic part in the groove 62, which is more convenient and faster.

[0032] See Figures 1-2 and Figures 5-6In this embodiment, preferably, the receiving assembly 7 includes a fixed frame 71, which is fixedly connected to the turntable 12. A cylinder 72 is provided at the bottom of the fixed frame 71, and a lifting rod 73 is slidably disposed within the cylinder 72. A receiving plate 74 is fixedly connected to the side of the lifting rod 73 away from the cylinder 72. A second spring 75 is fixedly connected between the receiving plate 74 and the turntable 12. When a plastic part detaches from the moving block 61 and falls onto the receiving plate 74, the receiving plate 74 moves downward under the pressure of the plastic part, thus compressing the second spring 75. The compression of the second spring 75 can buffer some of the impact force from the detachment of the plastic part, providing some protection. Furthermore, the descent of the receiving plate 74 causes the lifting rod 73 to move downward along the cylinder 72, allowing the plastic part to enter the fixed frame 71. The side plates in several directions can provide certain limiting protection for the plastic components. In the initial state, the receiving plate 74 is located below the moving block 61 and is in contact with the bottom of the moving block 61. At this time, the second spring 75 is in a compressed state. When the moving block 61 moves away from the fixed block 4 until it moves to the bottom of the moving block 61 and no longer contacts the receiving plate 74, the second spring 75 will bounce upward due to the loss of the contacting effect of the moving block 61, causing the receiving plate 74 and the lifting rod 73 to move upward. The receiving plate 74 moves to a position flush with the groove 62 to catch the demolded plastic part. Then, under the pressure of the plastic part, the receiving plate 74 moves downward, causing the plastic part to enter the fixed frame 71. At this time, the plastic part will not block the movement of the moving block 61, because to form the next plastic part, the moving block 61 needs to move towards the fixed block 4 until it contacts the fixed block 4.

[0033] See Figures 3-4As shown, in this embodiment, preferably, a notch 611 is provided on one side of the moving block 61, and a pressure plate 13 is provided above the turntable 12. The pressure plate 13 is fixedly connected to the positioning plate 5, and a sloping groove 131 is provided at the bottom of the pressure plate 13. The sloping groove 131 is connected to the receiving plate 74 in a transmission manner. The design of the notch 611 allows the receiving plate 74 to rise to a position flush with the groove 62 more quickly, which can easily catch the demolded plastic parts. When the receiving component 7 containing the plastic parts rotates to one side under the action of the turntable 12, and then the unloading component 8 pushes the plastic parts on the receiving plate 74 away, due to the loss of pressure from the plastic components, the second spring 75 will drive the lifting rod 73 and the receiving plate 74 to move upward, which will be higher than the bottom height of the moving block 61. It will not be convenient to continue to catch the demolded plastic parts. When the next molding of plastic parts is required, the moving block 61 moves towards the fixed block 4. At this time, the turntable 12 is rotated to switch the receiving component 7. The receiving component 7 with the plastic parts is rotated to the vicinity of the pressure plate 13. The receiving component 7 in this position will also be rotated to one side. During the rotation, the receiving plate 74 will abut against the inclined groove 131 opened in the pressure plate 13. Under the action of the inclined groove 131, the receiving plate 74 will be driven to move downward. The bottom height of the pressure plate 13 is lower than the bottom height of the moving block 61. The height of the receiving plate 74 will also be restricted to below the moving block 61 again. In this way, when the turntable 12 rotates and the receiving plate 74 rotates to the bottom of the moving block 61, it will also abut against the bottom of the moving block 61.

[0034] See Figure 8In this embodiment, preferably, a first gear 14 is fixedly sleeved on the outer side of the rotating shaft 11, and a fixing ring 15 is fixedly mounted on the first gear 14. The inner side of the fixing ring 15 is serrated. A third spring 16 is fixedly mounted on the outer side of the rotating shaft 11, and a serrated block 17 is fixedly connected to the side of the third spring 16 away from the rotating shaft 11. The serrated block 17 is connected to the serrated part of the inner side of the fixing ring 15. A first rack 18 is fixedly connected below the fixing block 4, and the first rack 18 meshes with the first gear 14. When the moving block 61 moves away from the fixing block 4, it will drive the first rack 18 to move. When it moves in this direction, the first rack 18 will drive the first gear 14 to rotate. The rotation of the first gear 14 will drive the fixing ring 15 to rotate, but the rotation of the fixing ring 15 in this direction will not drive the serrated block 17 to rotate. The serrated part of 5 will not engage with the serrated block 17, and will cause the serrated block 17 to move downward, thereby compressing the third spring 16. Therefore, it will not cause the rotating shaft 11 to rotate, and the turntable 12 will not rotate. This allows the receiving plate 74 located below the moving block 61 to easily catch the demolded plastic part. After the plastic part is caught, in order to form the next plastic part, the moving block 61 will move towards the fixed block 4. This movement will also cause the first rack 18 to move, thereby causing the first gear 14 and the fixed ring 15 to rotate. The rotation of the fixed ring 15 in this direction will cause the rotating shaft 11 to rotate through the engagement of the serrated block 17, thereby causing the turntable 12 to rotate. The rotation of the turntable 12 will rotate the receiving plate 74 containing the plastic part located below the moving block 61 to one side, and then rotate the new receiving assembly 7 below the moving block 61 to catch the next demolded plastic part.

[0035] See Figures 9-10As shown, in this embodiment, preferably, the feeding assembly 8 includes a top rod 81. One end of the top rod 81 movably passes through the side plate of the fixed frame 71. A fixed frame 82 is movably sleeved and connected to the outer side of the top rod 81 away from the fixed frame 71. The fixed frame 82 is fixedly connected to the turntable 12. A circular groove 83 is formed in the fixed frame 82. The top rod 81 is movably connected to the circular groove 83. A vertical groove 84 is formed on the fixed frame 82. The vertical groove 84 communicates with the circular groove 83. A limiting rod 85 is movably arranged in the vertical groove 84. A fourth spring 86 is fixedly connected between the bottom of the limiting rod 85 and the vertical groove 84. A limiting groove 851 is formed at the top of the limiting rod 85. A limiting ring 87 is fixedly sleeved on the outer side of the top rod 81. A fifth spring 88 is provided on the side of the limiting ring 87 away from the fixed frame 71. The limiting ring 87 is movably engaged with the limiting groove 851. In the initial state, the limiting ring 87 is engaged with the limiting groove 851. At this time, the fifth spring 88 is in a compressed state, and the end of the push rod 81 located inside the fixed frame 71 is in contact with the plastic part placed inside. The limiting rod 85 moves downward along the vertical groove 84, thereby compressing the fourth spring 86. The downward movement of the limiting rod 85 causes the limiting groove 851 to lose contact with the limiting ring 87. After the limiting ring 87 loses contact, the fifth spring 88 will drive the limiting ring 87 and the push rod 81 to move along the circular groove 83 towards the side closer to the fixed frame 71 during the process of restoring the state. This will push the plastic part placed on the receiving plate 74 inside the fixed frame 71 out of the fixed frame 71, ensuring that the unloading operation is completed in this receiving assembly 7. This step ensures that there are no plastic parts in the receiving assembly 7 by pushing the plastic part placed on the receiving plate 74 through the unloading assembly 8. This makes it convenient to pick up the plastic parts and to receive other plastic parts.

[0036] See Figures 9-11As shown, in this embodiment, preferably, a cylinder 19 is slidably disposed on the outer side of the top rod 81 away from the fixed frame 71. The fifth spring 88 is fixed between the limiting ring 87 and the cylinder 19. The cylinder 19 is slidably connected to the circular groove 83 and one side is located outside the fixed frame 82. A sixth spring 20 is fixedly connected between the cylinder 19 and the fixed frame 82. The limiting rod 85 has a slanted opening 852 at its center. A crossbar 21 is movably disposed within the slanted opening 852. The crossbar 21 movably passes through the fixed frame 82 and is fixedly connected to a fixed plate at its end. 22. The fixing plate 22 is fixedly connected to the cylinder 19. The cylinder 19 moves along the direction of the push rod 81. The movement of the cylinder 19 causes the sixth spring 20 to be in a compressed state. At the same time, the movement of the cylinder 19 will cause the fixing plate 22 and the crossbar 21 to move closer to the limiting rod 85. The crossbar 21 will cooperate with the inclined opening 852 of the limiting rod 85 to realize that the limiting rod 85 moves downward along the vertical groove 84, thereby realizing that the limiting groove 851 and the limiting ring 87 are released from contact. At this time, under the action of the fifth spring 88, the push rod 81 will push away the plastic parts placed on the receiving plate 74.

[0037] See Figure 7 and Figure 12 In this embodiment, preferably, an arc-shaped block 23 is provided above the turntable 12. The arc-shaped block 23 is fixedly connected to the pressure plate 13, and the arc-shaped plate is in transmission contact with the cylinder 19. When the rotation of the turntable 12 drives the receiving assembly 7 containing the plastic parts to rotate to the other side for unloading, the cylinder 19 will contact the arc-shaped block 23 during the rotation process, thereby driving the cylinder 19 to move closer to the fixed frame 71, so that the limiting groove 851 and the limiting ring 87 are released from contact. In this way, the push rod 81 can push away the plastic parts placed on the receiving plate 74 to realize the unloading operation of the plastic parts. The design of the arc-shaped block 23 makes it easier to unload the plastic parts during the rotation of the turntable 12.

[0038] See Figures 9-10As shown, in this embodiment, preferably, a block 24 is fixedly sleeved on the outer side of the top rod 81, and a moving groove 241 is opened on one side of the block 24. The moving groove 241 is designed in an inclined shape. The end of the lifting rod 73 away from the receiving plate 74 moves through the turntable 12 and is fixedly connected to the moving plate 25 at the end. The moving plate 25 is connected to the moving groove 241 in a transmission manner. When the top rod 81 pushes away the plastic part placed on the receiving plate 74, part of the top rod 81 is located inside the fixed frame 71. Due to the loss of pressure from the plastic part, the second spring 75 will drive the lifting rod 73 and the receiving plate 74 to move upward. At this time, it is necessary to restore the top rod 81 to the initial position. The push rod 81 blocks the rise of the receiving plate 74, and in order for the feeding assembly 8 to regain its feeding function, the push rod 81 also needs to return to its initial position. The fifth spring 88 must be in a compressed state. When the lifting rod 73 moves upward, it will drive the moving plate 25 to move upward, thereby engaging with the moving groove 241 of the block 24 to move the block 24 away from the fixed frame 71. The movement of the block 24 drives the push rod 81 to move away from the fixed frame 71. The push rod 81 drives the limiting ring 87 to move along the circular groove 83 away from the fixed frame 71 until the limiting ring 87 is engaged with the limiting groove 851 again. This makes the push rod 81 ready to feed again.

[0039] See Figure 1 and Figure 2 As shown in this embodiment, preferably, a conveyor belt 26 is provided on one side of the turntable 12, and the conveyor belt 26 is fixedly connected to the horizontal plate 9; the plastic parts pushed out of the fixed frame 71 by the push rod 81 will be transported to the conveyor belt 26, and the completed plastic parts will be transferred by the conveyor belt 26, which will not form a pile-up and affect the unloading operation of the unloading component 8.

[0040] The working principle of this invention is as follows: Raw materials are added to the heating cylinder 1 and heated to melt. The melted material is injected through the injection head 2 into the molding groove 41 of the fixed block 4 for cooling. The melted raw material is cooled and shaped within the groove 62 of the moving block 61 and the molding groove 41 of the fixed block 4. After the raw material is shaped, the moving block 61 moves away from the fixed block 4 along the fixed rod 10. The movement of the moving block 61 drives the positioning frame 63, the moving rod 64, and the extrusion frame 65 to move together. When the moving rod 64 moves to abut against the positioning plate 5 and then continues to move, the moving rod 64 will move in the opposite direction, thereby driving the extrusion frame 65 to move towards the moving block 61, thus extruding the plastic part shaped in the groove 62 from the moving block 61. During this process, the first spring 66 is compressed, and the plastic part squeezed out of the groove 62 opened by the moving block 61 falls onto the receiving plate 74 below. Because the plastic part has a certain weight, the receiving plate 74 moves downwards under the pressure of the plastic part, thus compressing the second spring 75. The compression of the second spring 75 can buffer some of the impact force from the falling plastic part, providing some protection. Furthermore, the descent of the receiving plate 74 causes the lifting rod 73 to move downwards along the cylinder 72, allowing the plastic part to enter the fixed frame 71. The side plates of the fixed frame 71 in several directions can provide some limiting protection for the plastic component, because initially, the receiving plate 74 is located below the moving block 61 and adjacent to the moving block 61. When the bottom of the moving block 61 is in contact with the fixed block 4, the second spring 75 is compressed. When the moving block 61 moves away from the fixed block 4 until its bottom no longer contacts the receiving plate 74, the second spring 75 will spring upward due to the loss of contact. This will cause the receiving plate 74 and the lifting rod 73 to move upward. The receiving plate 74 moves to a position flush with the groove 62 to catch the demolded plastic part. Then, under the pressure of the plastic part, the receiving plate 74 moves downward, causing the plastic part to enter the fixed frame 71. At this time, the plastic part will not obstruct the movement of the moving block 61. Because the molding of the next plastic part requires the moving block 61 to move closer to the fixed block 4 until it contacts the fixed block 4, the second spring 75 will spring upward. Moving the movable block 61 away from the fixed block 4 will cause the first rack 18 to move. During this movement, the first rack 18 will drive the first gear 14 to rotate. The rotation of the first gear 14 will cause the fixed ring 15 to rotate. However, this rotation of the fixed ring 15 will not cause the serrated block 17 to rotate. The serrated portion of the fixed ring 15 will not engage with the serrated block 17, causing the serrated block 17 to move downwards, thus compressing the third spring 16. Therefore, it will not cause the rotating shaft 11 to rotate, and the turntable 12 will not rotate. This allows the receiving plate 74, located below the movable block 61, to easily catch the demolded plastic part. After the plastic part is caught, the movable block 61 will move closer to the fixed block 4 to facilitate the molding of the next plastic part.This movement in this direction will also cause the first rack 18 to move, thereby causing the first gear 14 and the fixed ring 15 to rotate. The rotation of the fixed ring 15 in this direction will cause the rotating shaft 11 to rotate through the engagement of the sawtooth block 17, thereby causing the turntable 12 to rotate. The rotation of the turntable 12 will rotate the receiving plate 74 containing the plastic part located below the moving block 61 to one side, and then rotate the new receiving assembly 7 to the underside of the moving block 61 to catch the plastic part to be demolded next. In addition, when the rotation of the turntable 12 causes the receiving assembly 7 containing the plastic part to rotate to the other side for unloading, the cylinder 19 will abut against the arc block 23 during the rotation, thereby causing the cylinder 19 to move closer to the fixed frame 71. As the cylinder 19 moves, it compresses the sixth spring 20. Simultaneously, the movement of the cylinder 19 causes the fixed plate 22 and the crossbar 21 to move closer to the limiting rod 85. The crossbar 21 engages with the inclined opening 852 of the limiting rod 85, causing the limiting rod 85 to move downwards along the vertical groove 84. This releases the limiting groove 851 and the limiting ring 87 from contact. After the limiting ring 87 loses contact, the fifth spring 88, during its return to its original state, causes the limiting ring 87 and the push rod 81 to move along the circular groove 83 towards the side closer to the fixed frame 71, thus pushing the plastic part placed on the receiving plate 74 inside the fixed frame 71 out of the fixed frame 71, ensuring the unloading operation is completed within this receiving assembly 7.

Claims

1. A molding mechanism of an injection mold for airtight plastic product, comprising a heating cylinder, characterized in that, The injection head is provided on one side of the heating cylinder, a partition plate is provided on one side of the injection head, a fixing block is provided on the side away from the injection head of the partition plate, a forming groove is formed in the fixing block, a positioning plate is provided on the side away from the heating cylinder of the partition plate, a horizontal plate and a fixing rod are fixedly arranged between the positioning plate and the partition plate, an injection molding assembly is slidably arranged on the fixing rod, a rotating shaft is rotatably connected to the horizontal plate, a rotating disc is fixedly arranged on the outer side of the rotating shaft, a plurality of groups of material receiving assemblies are arranged in an annular array on the rotating disc, and a material discharging assembly is arranged on one side of the material receiving assembly. The injection molding assembly comprises a moving block, the moving block is slidably connected to the fixing rod, a recess is formed in the moving block, a positioning frame is fixedly arranged on the side away from the fixing block of the moving block, a moving rod is movably arranged on the side away from the moving block of the positioning frame, an extrusion frame is fixedly connected to the side away from the positioning plate of the moving rod, the extrusion frame is slidably connected to the moving block, and a first spring is fixedly arranged between the extrusion frame and the moving block. The material receiving assembly comprises a fixed frame, the fixed frame is fixedly connected to the rotating disc, a cylinder is arranged at the bottom of the fixed frame, a lifting rod is slidably arranged in the cylinder, a material receiving plate is fixedly connected to the side away from the cylinder of the lifting rod, and a second spring is fixedly connected between the material receiving plate and the rotating disc. A notch is formed in one side of the moving block, a pressing plate is arranged above the rotating disc, the pressing plate is fixedly connected to the positioning plate, an inclined groove is formed in the bottom of the pressing plate, and the inclined groove is in transmission connection with the material receiving plate. A first gear is fixedly arranged on the outer side of the rotating shaft, a fixed ring is fixedly arranged on the first gear, the inner side of the fixed ring is provided in a sawtooth shape, a third spring is fixedly arranged on the outer side of the rotating shaft, a sawtooth block is fixedly connected to the side away from the rotating shaft of the third spring, the sawtooth block is in transmission connection with the sawtooth-shaped part of the inner side of the fixed ring, and a first rack is fixedly connected below the fixing block. The material discharging assembly comprises a jacking rod, one end of the jacking rod movably penetrates through the side plate of the fixed frame, a fixed frame is movably arranged on the outer side of the end away from the fixed frame of the jacking rod, the fixed frame is fixedly connected to the rotating disc, a circular groove is formed in the fixed frame, the jacking rod is movably connected to the circular groove, a vertical groove is formed in the fixed frame, the vertical groove is in communication with the circular groove, a limiting rod is movably arranged in the vertical groove, a fourth spring is fixedly connected between the bottom of the limiting rod and the vertical groove, a limiting groove is formed in the top of the limiting rod, a limiting ring is fixedly arranged on the outer side of the jacking rod, a fifth spring is arranged on the side away from the fixed frame of the limiting ring, and the limiting ring is movably connected to the limiting groove.

2. A molding mechanism for an injection mold of a gas-tight plastic product according to claim 1, wherein The top rod is slidably provided with a cylinder outside one end of the fixed frame, the fifth spring is fixed between the limiting ring and the cylinder, the cylinder is slidably connected with the circular groove and located outside the fixed frame on one side, the sixth spring is fixedly connected between the cylinder and the fixed frame, the center of the limiting rod is provided with an inclined opening, the inclined opening is movably provided with a cross rod, the cross rod movably penetrates through the fixed frame and is fixedly connected with a fixed plate at the tail end, and the fixed plate is fixedly connected with the cylinder.

3. A molding mechanism for an injection mold of airtight plastic product according to claim 2, wherein An arc-shaped block is arranged above the rotating disc, the arc-shaped block is fixedly connected with the pressing plate, and the arc-shaped block is in transmission abutment with the cylinder.

4. A molding mechanism for an injection mold of a gas-tight plastic product according to claim 3, wherein The outside of the top rod is fixedly sleeved with a square block, one side of the square block is provided with a moving groove, the moving groove is designed in an inclined manner, the lifting rod movably penetrates through the rotating disc away from one end of the object receiving plate and is fixedly connected with a moving plate at the tail end, and the moving plate is in transmission connection with the moving groove.

5. The injection molding apparatus of claim 1, wherein One side of the rotating disc is provided with a conveying belt, and the conveying belt is fixedly connected with the cross plate.

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