A plastic cup injection molding device

Abstract

This utility model discloses a plastic cup injection molding equipment. A central column is rotatably mounted in the center of the base. A fixing component is mounted on the outer side of the central column. A lower mold is slidably mounted on the inner side of the fixing component. A rotating mechanism is mounted at the bottom of the central column. An injection mechanism is provided on the upper part of the lower mold located at the rear. A shaping mechanism is provided on the outer side of the lower mold located on the right. A cooling mechanism is provided below the lower mold located at the front. A pneumatic demolding mechanism is provided below the lower mold located on the left. The rotating base drives four sets of workstations to cycle and switch processes, simultaneously completing injection molding, pressure holding, cooling, and pneumatic demolding. The demolding station uses compressed air to push the push plate to eject the cup body and connects to a negative pressure collection system to achieve automatic material discharge. This design shortens the single-piece production cycle by more than 40% and avoids cup body deformation caused by traditional mechanical push rods. It is suitable for the efficient production of beverage cups made of PP, PET, and other materials.

Description

Technical Field

[0001] This utility model relates to the field of plastic product processing technology, and more specifically, to a plastic cup injection molding equipment. Background Technology

[0002] Plastic cup injection molding equipment typically includes an injection system, a mold clamping system, and auxiliary systems to enable the rapid manufacturing of plastic cups.

[0003] Patent CN 219667300 U discloses a plastic cup injection molding equipment, including a hydraulic device and an upper mold plate, a lower mold plate, and a base plate arranged from top to bottom. It also includes at least one set of molds, each comprising an upper mold, a lower mold, and a mold core. The upper mold is mounted on the upper mold plate, the lower mold is mounted on the lower mold plate, and the mold core is located inside the lower mold. One end of the mold core extends beyond the surface of the lower mold, and the other end is fixedly mounted to the base plate. When the upper mold plate moves downward, the upper mold, lower mold, and mold core together form the molding cavity of the plastic cup. After casting, the upper mold plate is removed, and the plastic cup remains on the mold core. The upper mold plate moves upward under the action of the hydraulic device, and the lower mold pulls the plastic cup away from the mold core, thus completing the demolding of the product. This invention has a compact structure, a simple demolding process for the plastic cup, high stability, and can simultaneously complete the assembly line operation of multiple sets of plastic cup products.

[0004] Current plastic cup injection molding equipment generally suffers from two major defects: single-station equipment requires waiting for cooling to complete before demolding can proceed to the next cycle; traditional ejector pin demolding can easily cause deformation of thin-walled cups; existing improvement solutions, such as dual-station alternating operation, improve efficiency, but the structure is complex and the demolding optimization problem has not been solved.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a plastic cup injection molding equipment to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A plastic cup injection molding equipment includes a base, a central column rotatably mounted in the center of the base, a fixing member mounted on the outer side of the central column, a lower mold slidably mounted on the inner side of the fixing member, a rotating mechanism mounted at the bottom end of the central column, an injection mechanism located on the upper part of the lower mold located on the rear side, a shaping mechanism located on the outer side of the lower mold located on the right side, a cooling mechanism located below the lower mold located on the front side, and a pneumatic demolding mechanism located below the lower mold located on the left side.

[0009] As a further embodiment of this utility model, a vent hole is provided at the center of the bottom end of the lower mold, and a pusher plate is slidably installed on the inner side of the lower mold.

[0010] As a further embodiment of this utility model, the rotating mechanism includes a first servo motor, a small gear is fixedly connected to the end of the main shaft of the first servo motor, a large gear is meshed with the outer side of the small gear, and the large gear is fixedly connected to the central column.

[0011] As a further embodiment of this utility model, the injection molding mechanism includes a material conveying frame, a material hopper is fixedly installed on the inner side of the top of the material conveying frame, and a screw conveyor is provided at the bottom of the material hopper.

[0012] As a further embodiment of this utility model, the shaping mechanism includes a standing block, a second servo motor is fixedly installed at the top of the standing block, a lead screw is fixedly connected to the end of the main shaft of the second servo motor, a lead screw sleeve is spirally connected to the outside of the lead screw, a mounting plate is fixedly connected to the outside of the lead screw sleeve, an upper mold is provided below the mounting plate, and bolts are installed on the inner side of the mounting plate and the upper mold.

[0013] As a further embodiment of this utility model, the pneumatic demolding mechanism includes an air pump, and a rigid air pipe is fixedly installed at the top of the air pump.

[0014] As a further embodiment of this utility model, a vibration damping support is fixedly installed at the bottom end of the base, and a controller is installed at the bottom end of the base.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention uses four sets of lower molds to form an injection station, a pressure holding station, a cooling station, and a demolding station. Molten PP material is injected into station 1, rotated 90° to station 2 for pressure holding, then rotated 90° to station 3 to cool the mold, and finally rotated to station 4 for pneumatic demolding. The demolded cup can be transported to a collection box by a negative pressure collection pipe, and then the cycle can begin again. This device can shorten the production cycle, and pneumatic demolding can also prevent cup deformation. It is suitable for the efficient production of beverage cups made of PP, PET, and other materials. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall structure of a plastic cup injection molding equipment according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the central column of a plastic cup injection molding equipment according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram showing the position of the vent hole on the lower mold of a plastic cup injection molding equipment according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the rotating mechanism of a plastic cup injection molding equipment according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the shaping mechanism of a plastic cup injection molding equipment according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Base; 2. Central column; 3. Fixing component; 4. Lower mold; 5. Rotation mechanism; 6. Shaping mechanism; 7. Injection mechanism; 8. Cooling mechanism; 9. Pneumatic demolding mechanism;

[0025] 41. Vent hole; 42. Push plate; 51. First servo motor; 52. Pinion; 53. Large gear; 61. Stand block; 62. Second servo motor; 63. Lead screw; 64. Lead screw sleeve; 65. Mounting plate; 66. Upper mold; 67. Bolt; 71. Conveying frame; 72. Hopper; 73. Screw conveyor; 91. Air pump; 92. Rigid vent pipe. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0027] According to an embodiment of the present invention, a plastic cup injection molding equipment is provided.

[0028] Please refer to the instruction manual appendix. Figure 1-5According to an embodiment of the present invention, a plastic cup injection molding equipment includes a base 1, a central column 2 rotatably mounted in the center of the base 1, a fixing member 3 mounted on the outer side of the central column 2, a lower mold 4 slidably mounted on the inner side of the fixing member 3, a rotating mechanism 5 mounted at the bottom end of the central column 2, an injection molding mechanism 7 provided on the upper part of the lower mold 4 located on the rear side, a shaping mechanism 6 provided on the outer side of the lower mold 4 located on the right side, a cooling mechanism 8 provided below the lower mold 4 located on the front side, and a pneumatic demolding mechanism 9 provided below the lower mold 4 located on the left side.

[0029] The four sets of lower molds form four stations with equal spacing around the circumference. Station 1 injects molten PP material → rotates 90° to station 2 for pressure holding → rotates another 90° to station 3 for cooling by a refrigerator → finally rotates to station 4 for pneumatic demolding; after demolding, the cup is transported to the collection box through a negative pressure collection pipe, and at the same time, station 1 begins the next injection cycle.

[0030] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, a vent hole 41 is provided at the center of the bottom end of the lower mold 4, and a pusher plate 42 is slidably installed on the inner side of the lower mold 4.

[0031] Compressed air is introduced into the lower mold 4 through the vent 41. The compressed air pushes up the push plate 42, and then the push plate 42 pushes out the shaped cup body.

[0032] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, the rotating mechanism 5 includes a first servo motor 51, a small gear 52 is fixedly connected to the end of the main shaft of the first servo motor 51, a large gear 53 is meshed with the outer side of the small gear 52, and the large gear 53 is fixedly connected to the central column 2.

[0033] The first servo motor 51 drives the pinion 52 to rotate, the pinion 52 drives the large gear 53 to rotate, the large gear 53 drives the central column 2 to rotate, and the central column 2 drives the fixed part 3 to rotate 90 degrees in a single operation.

[0034] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, the injection molding mechanism 7 includes a material conveying frame 71, a material hopper 72 is fixedly installed on the inner side of the top of the material conveying frame 71, and a screw conveyor 73 is provided at the bottom of the material hopper 72.

[0035] An electric heating wire is installed in the tube wall of the screw conveyor 73 so that the material can be kept in a molten state. After the material in the hopper 72 falls, it enters the screw conveyor 73, and the drive motor drives the auger to make the molten material fall into the lower mold 4.

[0036] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, the shaping mechanism 6 includes a standing block 61, a second servo motor 62 is fixedly installed at the top of the standing block 61, a lead screw 63 is fixedly connected to the end of the main shaft of the second servo motor 62, a lead screw sleeve 64 is spirally connected to the outside of the lead screw 63, an installation plate 65 is fixedly connected to the outside of the lead screw sleeve 64, an upper mold 66 is provided below the installation plate 65, and bolts 67 are installed on the inner side of the installation plate 65 and the upper mold 66.

[0037] The second servo motor 62 drives the lead screw 63 to rotate, and the lead screw 63 drives the lead screw sleeve 64 to rotate and rise, which in turn drives the mounting plate 65 and the upper mold 66 to rise and fall synchronously. After the upper mold 66 and the lower mold 4 are closed, pressure is maintained and the shape is set.

[0038] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, the pneumatic demolding mechanism 9 includes an air pump 91, and a rigid air pipe 92 is fixedly installed at the top of the air pump 91.

[0039] After the air pump 91 compresses the air, it delivers the compressed air to the air vent 41 through the rigid air pipe 92.

[0040] In one embodiment, please refer to the appendix to the specification. Figure 1-5 As a further embodiment of this utility model, a vibration damping support is fixedly installed at the bottom end of the base 1, and a controller is installed at the bottom end of the base 1.

[0041] This allows the device to reduce vibration, and the controller allows the workstation to rotate and operate in a cyclical manner.

[0042] In use, the four sets of lower molds form four stations with equal spacing around the circumference. Station 1 injects molten PP material → rotates 90° to station 2 for pressure holding → rotates another 90° to station 3 for cooling by the refrigerator → finally rotates to station 4 for pneumatic demolding; after demolding, the cup is transported to the collection box through the negative pressure collection pipe, and at the same time, station 1 starts the next injection cycle.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A plastic cup injection molding equipment, comprising a base (1), characterized in that: A central column (2) is rotatably mounted in the center of the base (1). A fixing member (3) is mounted on the outside of the central column (2). A lower mold (4) is slidably mounted on the inside of the fixing member (3). A rotating mechanism (5) is mounted at the bottom of the central column (2). An injection molding mechanism (7) is provided on the upper part of the lower mold (4) located on the rear side. A shaping mechanism (6) is provided on the outside of the lower mold (4) located on the right side. A cooling mechanism (8) is provided below the lower mold (4) located on the front side. A pneumatic demolding mechanism (9) is provided below the lower mold (4) located on the left side.

2. The plastic cup injection molding equipment according to claim 1, characterized in that: The lower mold (4) has a ventilation hole (41) at the center of its bottom end, and a pusher plate (42) is slidably installed on the inner side of the lower mold (4).

3. The plastic cup injection molding equipment according to claim 1, characterized in that: The rotating mechanism (5) includes a first servo motor (51), a small gear (52) is fixedly connected to the end of the main shaft of the first servo motor (51), a large gear (53) is meshed with the outer side of the small gear (52), and the large gear (53) is fixedly connected to the central column (2).

4. The plastic cup injection molding equipment according to claim 1, characterized in that: The injection molding mechanism (7) includes a material conveyor (71), a hopper (72) is fixedly installed on the inner side of the top of the material conveyor (71), and a screw conveyor (73) is provided at the bottom of the hopper (72).

5. The plastic cup injection molding equipment according to claim 1, characterized in that: The shaping mechanism (6) includes a stand (61), a second servo motor (62) is fixedly installed at the top of the stand (61), a lead screw (63) is fixedly connected to the end of the main shaft of the second servo motor (62), a lead screw sleeve (64) is screwed to the outside of the lead screw (63), a mounting plate (65) is fixedly connected to the outside of the lead screw sleeve (64), an upper mold (66) is provided below the mounting plate (65), and bolts (67) are installed on the inner side of the mounting plate (65) and the upper mold (66).

6. The plastic cup injection molding equipment according to claim 1, characterized in that: The pneumatic demolding mechanism (9) includes an air pump (91), and a rigid air pipe (92) is fixedly installed at the top of the air pump (91).

7. The plastic cup injection molding equipment according to claim 1, characterized in that: The bottom end of the base (1) is fixedly equipped with a vibration damping support foot, and the bottom end of the base (1) is equipped with a controller.

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