Rotational molding mold convenient to demold

Abstract

The utility model relates to the technical field of rotational moulding processing, in particular to a rotational moulding mould convenient to demould, which comprises a bottom plate, a movable frame is hinged to the top of the bottom plate, a push rod is connected between the bottom plate and the movable frame, a movable upper mould and a movable lower mould are mounted on the upper portion of the movable frame, a top block is arranged inside the lower mould, and the upper mould and the lower mould can be spliced. The two ends of the upper mold and the two ends of the lower mold are coaxially and fixedly provided with butt joint cavities correspondingly. According to the rotational molding mold convenient to demold, the stability of the upper mold body and the lower mold body in the rotating process is improved through a butt joint cavity, a first servo motor is started during demolding to enable a threaded rod to rotate to push a push rod upwards, a movable frame keeps inclined in the demolding process, and a finished product is demolded from the interior of the upper mold body through gravity; the ejector block is pushed out of the clamping groove through pressurization of the air cylinder, the bottom of a finished product is upwards pushed out of the lower mold, manpower intervention in the demolding process is reduced, and the overall demolding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of rotational molding technology, specifically to a rotational molding mold that facilitates demolding. Background Technology

[0002] Rotational molding is a hollow molding method for thermoplastic plastics. In rotational molding, plastic raw materials are first added into a mold, and the mold is continuously rotated along a vertical axis. Under the action of gravity and heat, the plastic raw materials in the mold are gradually and evenly coated and adhered to the entire surface of the mold cavity. After cooling and solidification, the finished product needs to be demolded.

[0003] Currently, after rotational molding, the mold is usually inverted, and the finished product inside is poured out manually to complete the demolding. If the finished product is large or some parts stick together inside the mold, this demolding method requires a lot of manpower, resulting in slow demolding speed.

[0004] To address the aforementioned issues, we have made improvements and proposed a rotational molding die that facilitates demolding. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model provides a rotational molding mold that is easy to demold, including a base plate, a movable frame hinged to the top of the base plate, a push rod connected between the base plate and the movable frame, a movable upper mold and a lower mold installed on the upper part of the movable frame, a top block provided inside the lower mold, the upper mold and the lower mold can be spliced, and a docking cavity is coaxially fixedly installed at both ends of the upper mold and the lower mold.

[0007] As a preferred technical solution of this utility model, a lower mounting frame and an upper mounting frame are slidably mounted on the upper surface of the movable frame, and the two docking cavities are rotatably connected to the lower mounting frame and the upper mounting frame respectively. A through groove is provided on the lower mounting frame, and the through groove passes through the docking cavity on the lower mounting frame. A slot is provided on the inner surface of the docking cavity.

[0008] As a preferred technical solution of this utility model, a cylinder is fixedly installed on the outer surface of the lower mounting bracket, the end of the movable rod of the cylinder is fixedly connected to the top block, the top block is sealed and fitted to the inner surface of the slot, and a second servo motor is fixedly installed on the outer surface of the upper mounting bracket, the rotating shaft of the second servo motor is coaxially fixedly connected to the upper mold.

[0009] As a preferred technical solution of this utility model, an upper retaining ring is fixedly installed on the lower surface of the upper mold, a lower retaining ring is fixedly installed on the upper surface of the lower mold, and a rubber pad is fixedly installed at the end of the lower retaining ring. A reserved groove is opened on the front side surface of the upper retaining ring, the lower retaining ring is engaged with the reserved groove, and a plurality of ventilation holes are opened on the rear side of the reserved groove.

[0010] As a preferred embodiment of this utility model, a plurality of connecting parts are fixedly installed on the side surface of the upper retaining ring, and a plurality of connecting plates corresponding one-to-one with the connecting parts are fixedly installed on the side surface of the lower retaining ring. Threaded parts are rotatably installed on the connecting parts, and the threaded parts are threadedly connected to the connecting plates.

[0011] As a preferred technical solution of this utility model, the upper surface of the movable frame is provided with an upper sliding groove, and a linkage block is slidably installed inside the upper sliding groove. Electric telescopic rods are fixedly installed on the front and rear sides of the movable frame, respectively. The electric telescopic rods pass through the movable frame inward and are fixedly connected to the linkage blocks respectively. The tops of the two linkage blocks are fixedly connected to the lower mounting frame and the upper mounting frame respectively. The lower mounting frame and the upper mounting frame are slidably connected to the upper surface of the movable frame.

[0012] As a preferred embodiment of this utility model, a sliding groove is provided on the upper surface of the base plate, a threaded rod is rotatably installed inside the sliding groove, a slider is threadedly connected to the surface of the threaded rod and slidably connected to the inner surface of the sliding groove, a first servo motor is fixedly installed on the outside of the base plate, the rotation shaft of the first servo motor is coaxially fixedly connected to the threaded rod, the top of the slider is hinged to the bottom of the push rod, and the other end of the push rod is hinged to the lower surface of the moving frame.

[0013] The beneficial effects of this utility model are: This rotational molding mold that facilitates demolding improves the stability of the upper and lower molds during rotation through the mating cavity. During demolding, the first servo motor is activated to rotate the threaded rod and push the push rod upward, keeping the moving frame tilted during demolding. Gravity is used to remove the finished product from the upper mold, and the cylinder pressurizes to push the top block out of the slot, pushing the bottom of the finished product upward out of the lower mold. This reduces manual intervention in the demolding process and improves the overall demolding efficiency. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2This is a partially enlarged structural diagram of the upper and lower molds of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model;

[0018] Figure 4 This is an enlarged structural diagram of point A of this utility model;

[0019] Figure 5 This is a partially enlarged structural diagram of the base plate of this utility model;

[0020] In the diagram: 1. Base plate; 2. Moving frame; 3. Upper mold; 4. Lower mold; 5. Lower mounting frame; 6. Upper mounting frame; 7. First servo motor; 8. Electric telescopic rod; 9. Upper slide groove; 10. Second servo motor; 11. Cylinder; 12. Push rod; 13. Connecting piece; 14. Connecting plate; 15. Threaded part; 16. Threaded rod; 17. Slider; 18. Lower slide groove; 19. Upper retaining ring; 20. Reserved groove; 21. Lower retaining ring; 22. Docking cavity; 23. Through groove; 24. Top block; 25. Slot. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figure 1-5 As shown, a rotational molding mold that facilitates demolding includes a base plate 1, a movable frame 2 hinged to the top of the base plate 1, a push rod 12 connecting the base plate 1 and the movable frame 2, a movable upper mold 3 and a lower mold 4 mounted on the upper part of the movable frame 2, a top block 24 provided inside the lower mold 4, the upper mold 3 and the lower mold 4 can be spliced, and a docking cavity 22 is coaxially fixedly installed at both ends of the upper mold 3 and the lower mold 4, the docking cavity 22 wraps around the top of the upper mold 3 and the lower mold 4, improving the stability of the connection between the upper mold 3 and the lower mold 4 and the lower mounting frame 5 and the upper mounting frame 6.

[0023] The upper surface of the movable frame 2 is slidably mounted with a lower mounting frame 5 and an upper mounting frame 6. Two docking cavities 22 are rotatably connected to the lower mounting frame 5 and the upper mounting frame 6 respectively. A through groove 23 is provided on the lower mounting frame 5, and the through groove 23 passes through the docking cavity 22 on the lower mounting frame 5. A slot 25 is provided on the inner surface of the docking cavity 22.

[0024] A cylinder 11 is fixedly installed on the outer surface of the lower mounting bracket 5. The end of the movable rod of the cylinder 11 is fixedly connected to the top block 24. The top block 24 is sealed and fitted to the inner surface of the slot 25 to prevent molten plastic from entering the through groove 23 during the rotational molding process and affecting the quality of the rotational molding product. A second servo motor 10 is fixedly installed on the outer surface of the upper mounting bracket 5. The rotation shaft of the second servo motor 10 is coaxially fixedly connected to the upper mold 3.

[0025] During the demolding process, the cylinder 11 is activated to push the top block 24 forward, causing the top block 24 to disengage from the slot 25, which in turn pushes the rotationally molded finished product inside the lower mold 4 upward so that it can be quickly detached, reducing the intervention of external manpower and improving demolding efficiency.

[0026] An upper retaining ring 19 is fixedly installed on the lower surface of the upper mold 3, and a lower retaining ring 21 is fixedly installed on the upper surface of the lower mold 4. A rubber pad is fixedly installed at the end of the lower retaining ring 21. A reserved groove 20 is opened on the front surface of the upper retaining ring 19, and the lower retaining ring 21 is engaged with the reserved groove 20. Several ventilation holes are opened on the rear side of the reserved groove 20.

[0027] Several connectors 13 are fixedly installed on the side surface of the upper retaining ring 19, and several connecting plates 14 corresponding to the connectors 13 are fixedly installed on the side surface of the lower retaining ring 21. Threaded parts 15 are rotatably installed on the connectors 13, and the threaded parts 15 are threadedly connected to the connecting plates 14.

[0028] When the upper mold 3 and the lower mold 4 are connected, the lower mounting bracket 5 and the upper mounting bracket 6 approach each other until the lower retaining ring 21 is inserted into the reserved groove 20. The vent hole on the rear side of the reserved groove 20 prevents air resistance from preventing the lower retaining ring 21 from being inserted. The rubber pad improves the sealing of the connection between the upper retaining ring 19 and the lower retaining ring 21. During the process of the lower retaining ring 21 being inserted into the upper retaining ring 19, the threaded part 15 is turned to make the threaded part 15 stably connected to the connecting plate 14, thereby improving the stability of the splicing of the upper mold 3 and the lower mold 4 during the rotational molding process.

[0029] The upper surface of the movable frame 2 is provided with an upper sliding groove 9, and a linkage block is slidably installed inside the upper sliding groove 9. Electric telescopic rods 8 are fixedly installed on the front and rear sides of the movable frame 2 respectively. The electric telescopic rods 8 pass through the movable frame 2 inward and are fixedly connected to the linkage blocks respectively. The tops of the two linkage blocks are fixedly connected to the lower mounting frame 5 and the upper mounting frame 6 respectively. The lower mounting frame 5 and the upper mounting frame 6 are both slidably connected to the upper surface of the movable frame 2.

[0030] A sliding groove 18 is provided on the upper surface of the base plate 1. A threaded rod 15 is rotatably installed inside the sliding groove 18. A slider 17 is threadedly connected to the surface of the threaded rod 15 and slidably connected to the inner surface of the sliding groove 18. A first servo motor 7 is fixedly installed on the outside of the base plate 1. The rotation shaft of the first servo motor 7 is coaxially fixedly connected to the threaded rod 15. The top of the slider 17 is hinged to the bottom of the push rod 12. The other end of the push rod 12 is hinged to the lower surface of the moving frame 2. When adding rotational molding material into the lower mold 4 or after processing, the first servo motor 7 can be started to push the slider 17 forward so that the push rod 12 lifts one end of the moving plate 2. This not only avoids the raw material from spilling out, but also allows the finished product to be quickly removed from the upper mold 3 by gravity.

[0031] Working principle: This type of rotational molding mold that facilitates demolding can be used by starting the first servo motor 7 when adding rotational molding material to the lower mold 4 or after processing. The first servo motor 7 pushes the slider 17 forward, causing the push rod 12 to lift one end of the moving plate 2, thus preventing the material from spilling out. When the upper mold 3 and the lower mold 4 are connected, the lower mounting bracket 5 and the upper mounting bracket 6 move closer to each other until the lower retaining ring 21 is inserted into the reserved groove 20. The vent hole on the rear side of the reserved groove 20 prevents air resistance from preventing the lower retaining ring 21 from being inserted. The rubber pad improves the sealing of the connection between the upper retaining ring 19 and the lower retaining ring 21. During the insertion of the lower retaining ring 21 into the upper retaining ring 19, the threaded part 15 is tightened to ensure a stable connection between the threaded part 15 and the connecting plate 14, improving the stability of the splicing of the upper mold 3 and the lower mold 4 during the rotational molding process. During demolding, the cylinder 11 is activated to push the top block 24 forward, causing the top block 24 to disengage from the retaining groove 25. This pushes the rotationally molded product inside the lower mold 4 upward, allowing it to be quickly demolded, reducing the need for external manual intervention and improving demolding efficiency.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotational molding mold for easy demolding, comprising a base plate (1), characterized in that, The top of the base plate (1) is hinged to a movable frame (2), and a push rod (12) is connected between the base plate (1) and the movable frame (2). The upper part of the movable frame (2) is equipped with a movable upper mold (3) and a lower mold (4). The lower mold (4) is provided with a top block (24). The upper mold (3) and the lower mold (4) can be spliced ​​together. The two ends of the upper mold (3) and the lower mold (4) are respectively coaxially fixedly installed with docking cavities (22).

2. The rotational molding die for easy demolding according to claim 1, characterized in that, The upper surface of the movable frame (2) is slidably mounted with a lower mounting frame (5) and an upper mounting frame (6). The two docking cavities (22) are rotatably connected to the lower mounting frame (5) and the upper mounting frame (6) respectively. A through groove (23) is provided on the lower mounting frame (5). The through groove (23) passes through the docking cavity (22) on the lower mounting frame (5). A slot (25) is provided on the inner surface of the docking cavity (22).

3. The rotational molding die for easy demolding according to claim 2, characterized in that, A cylinder (11) is fixedly installed on the outer surface of the lower mounting bracket (5). The end of the movable rod of the cylinder (11) is fixedly connected to the top block (24). The top block (24) is sealed and fitted to the inner surface of the slot (25). A second servo motor (10) is fixedly installed on the outer surface of the upper mounting bracket (6). The rotating shaft of the second servo motor (10) is coaxially fixedly connected to the upper mold (3).

4. The rotational molding die for easy demolding according to claim 1, characterized in that, An upper retaining ring (19) is fixedly installed on the lower surface of the upper mold (3), and a lower retaining ring (21) is fixedly installed on the upper surface of the lower mold (4). A rubber pad is fixedly installed at the end of the lower retaining ring (21). A reserved groove (20) is opened on the front surface of the upper retaining ring (19). The lower retaining ring (21) is engaged with the reserved groove (20). Several ventilation holes are opened on the rear side of the reserved groove (20).

5. A rotational molding mold for easy demolding according to claim 4, characterized in that, The upper retaining ring (19) has several connecting parts (13) fixedly installed on its side surface, and the lower retaining ring (21) has several connecting plates (14) fixedly installed on its side surface, each corresponding to one of the connecting parts (13). A threaded part (15) is rotatably installed on the connecting part (13), and the threaded part (15) is threadedly connected to the connecting plate (14).

6. A rotational molding mold for easy demolding according to claim 1, characterized in that, The upper surface of the movable frame (2) is provided with an upper sliding groove (9), and a linkage block is slidably installed inside the upper sliding groove (9). Electric telescopic rods (8) are fixedly installed on the front and rear sides of the movable frame (2). The electric telescopic rods (8) pass through the movable frame (2) and are fixedly connected to the linkage blocks respectively. The tops of the two linkage blocks are fixedly connected to the lower mounting frame (5) and the upper mounting frame (6) respectively. The lower mounting frame (5) and the upper mounting frame (6) are slidably connected to the upper surface of the movable frame (2).

7. A rotational molding die for easy demolding according to claim 1, characterized in that, The upper surface of the base plate (1) is provided with a sliding groove (18), and a threaded rod (16) is rotatably installed inside the sliding groove (18). The surface of the threaded rod (16) is threadedly connected to a slider (17) that is slidably connected to the inner surface of the sliding groove (18). A first servo motor (7) is fixedly installed on the outside of the base plate (1). The rotation shaft of the first servo motor (7) is coaxially fixedly connected to the threaded rod (16). The top of the slider (17) is hinged to the bottom of the push rod (12), and the other end of the push rod (12) is hinged to the lower surface of the moving frame (2).

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