Mold assembly for rotational molding of scrubber

Abstract

The invention discloses a mold assembly for rotational molding of a scrubber, and relates to the technical field of rotational molding molds. The device comprises a base, a machining table is arranged at the top of the base, and a bottom mold and a top mold are arranged at the top of the machining table; a cooling assembly is arranged on the top of the base and comprises a water tank installed on the top of the base and a pressurizing water pump communicating with one side of the water tank. The formed mold is uniformly sprayed and cooled through the cooling assembly, so that a product is rapidly shrunk and demolded, the problems of difficult demolding and product damage caused by adhesion of the mold and the product at high temperature are effectively solved, the mold is driven by the driving assembly to rotate in a multi-axis mode, and it is ensured that plastic raw materials are uniformly distributed in the cavity; and the adjusting assembly is in linkage with the driving and spraying system, dynamic adjustment of the cooling angle is achieved, the cooling uniformity and efficiency are improved, and the rotational molding quality and the demolding success rate are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of rotational molding mold technology, and in particular relates to a mold assembly for rotational molding of floor scrubbers. Background Technology

[0002] Rotational molding molds for floor scrubbers are used to manufacture parts such as the outer shell, water tank, and roller brush cylinder of the floor scrubber. Rotational molding is used: raw materials such as PE are added to the mold, the mold rotates along two vertical axes and is heated, so that the material is evenly coated into the mold cavity under the action of gravity and heat. After cooling and solidification, the product is demolded. It can integrally mold complex curved surfaces, large parts and seamless structures, and has good sealing and corrosion resistance, uniform wall thickness and high strength.

[0003] A Chinese patent application (or patent) with publication number CN221622791U discloses a rotational molding mold for a floor scrubber casing, including a frame, a roller, a heating coil, a telescopic frame, a pusher plate, and a locking knob. A support frame is provided on the inner side of the frame, and a motor B is mounted on the frame to drive the support frame to swing. Several guide rings are evenly spaced on the inner side of the support frame. The roller is located inside the support frame and the guide rings and is rotatably connected to the guide rings. A motor A is mounted on the support frame to drive the roller to rotate. End caps A and B are respectively provided at both ends of the roller, and end cap B is detachably connected to the roller via the locking knob.

[0004] However, the above-mentioned device still has the following problems during implementation: After the floor scrubber shell is rotomolded using a molding die, it is pushed out of the die by a telescopic rod. However, in actual processing, the surface of the floor scrubber shell is not a complete cylinder, so it is not possible to push the floor scrubber shell out of the die directly. Moreover, the heat inside the molding die is high, and the die and the mold will stick together. Directly pushing it out of the die can easily cause damage.

[0005] To address these issues, we provide a mold assembly for rotational molding of floor scrubbers. Summary of the Invention

[0006] The purpose of this invention is to provide a mold assembly for rotational molding of floor scrubbers. By coordinating the cooling component, the driving component, and the adjusting component, this invention solves the problems in the prior art where the floor scrubber shell is directly ejected from the mold during rotational molding, resulting in high internal heat in the molding mold, adhesion between the mold and the model, and easy damage due to direct ejection.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a mold assembly for rotational molding of a floor scrubber, comprising a base, a processing table on top of the base, and a bottom mold and a top mold on top of the processing table; a cooling assembly on top of the base, comprising a water tank mounted on top of the base, a pressurized water pump connected to one side of the water tank, a delivery hose connected to the outlet of one side of the pressurized water pump, a support pipe connected to the other end of the delivery hose, and a nozzle connected to the surface of the support pipe, wherein the cooling assembly enables rapid demolding of the bottom mold and the top mold; a driving assembly on top of the base, comprising a mounting... A support plate is mounted on the top of the processing table, a drive motor is installed on one side of the support plate, two sets of rotating shafts are movably connected inside the support plate, drive wheels are mounted on the surface of the rotating shafts, and guide rail rings are mounted on one side of the bottom mold and the top mold. The drive assembly improves the uniformity of model forming. An adjustment assembly is provided on the top of the processing table. The adjustment assembly includes a cam mounted on the surface of the rotating shaft, a moving plate slidably connected to one side of the cam, a convex plate mounted on one side of the moving plate, a gear mounted on the surface of the support tube, and a toothed plate meshing with one side of the gear. The angle of the spray cooling is adjusted by the adjustment assembly.

[0009] The invention is further configured such that a pulley is movably connected to the bottom of the toothed plate, the bottom of the pulley contacts the convex plate, and the output end of the drive motor is fixedly connected to the rotating shaft.

[0010] The present invention is further configured such that the drive assembly includes sprockets mounted on the surfaces of two sets of rotating shafts, and chains meshing with the surfaces of the sprockets.

[0011] The present invention is further configured such that a fixing component is provided on the top of the processing table, the fixing component including a first snap-fit ​​plate installed on both sides of the bottom mold, a second snap-fit ​​plate installed on both sides of the top mold, a protective shell installed on one side of the bottom mold, an electric push rod installed inside the protective shell, and a snap-fit ​​shell installed at the output end of the electric push rod.

[0012] The present invention is further configured such that a slot is provided inside the snap-fit ​​shell for pushing the first snap-fit ​​plate and the second snap-fit ​​plate to abut against each other.

[0013] The present invention is further configured such that a support wheel is slidably connected inside the guide rail ring, a crossbar is fixedly connected inside the support wheel, and the surface of the crossbar is movably connected to the inner wall of the support plate through a bearing.

[0014] The invention is further configured such that a hydraulic rod is movably connected to the top of the base, and the output end of the hydraulic rod is movably connected to the processing table.

[0015] The present invention is further configured such that a water-blocking shell is fixedly connected to the top of the processing table, a support base is fixedly connected to one side of the water-blocking shell, and a first spring is fixedly connected to one side of the support base.

[0016] The invention is further configured such that a vertical plate is slidably connected to one side of the toothed plate, a vertical rod is provided through the bottom of the vertical plate, the bottom of the vertical rod is fixedly connected to the toothed plate, and a second spring is sleeved on the surface of the vertical rod.

[0017] The present invention is further configured such that a bracket is movably connected to the surface of the support tube, the bottom of the bracket is fixedly connected to the processing table, and one side of the vertical plate is fixedly connected to the bracket.

[0018] The present invention has the following beneficial effects: The present invention uses a cooling component to uniformly spray and cool the mold after molding, so that the product shrinks and demolds quickly, effectively solving the problems of difficult demolding and product damage caused by the adhesion between the mold and the product at high temperature. By driving the mold to rotate in multiple axes through the drive component, the plastic raw material is uniformly distributed in the cavity, improving the consistency of the product wall thickness and structural strength. By adjusting the linkage between the drive component and the spray system, the cooling angle can be dynamically adjusted, enhancing the uniformity and efficiency of cooling, and significantly improving the quality of rotational molding and the success rate of demolding.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a perspective view of a mold assembly used for rotational molding of floor scrubbers.

[0022] Figure 2 This is a schematic diagram showing the connection between the bottom mold and the top mold in a mold assembly for rotational molding of a floor scrubber.

[0023] Figure 3 This is a schematic diagram of the structure of a fixing component in a mold assembly used for rotational molding of a floor scrubber.

[0024] Figure 4 This is a schematic diagram of the support of the guide ring in a mold assembly used for rotational molding of floor scrubbers.

[0025] Figure 5 This is a schematic diagram of the top structure of the water-retaining shell in a mold assembly used for rotational molding of a floor scrubber.

[0026] Figure 6 This is a schematic diagram of the adjustment component in a mold assembly used for rotational molding of floor scrubbers.

[0027] Figure 7 This is a schematic diagram of the connection between gears and toothed plates in a mold assembly used for rotational molding of floor scrubbers.

[0028] Figure 8 This is a schematic diagram of a cooling component in a mold assembly used for rotational molding of floor scrubbers.

[0029] In the attached diagram: 1. Base; 2. Processing table; 3. Bottom mold; 4. Top mold; 5. Cooling component; 501. Water tank; 502. Pressurized water pump; 503. Delivery hose; 504. Support pipe; 505. Nozzle; 6. Drive component; 601. Support plate; 602. Drive motor; 603. Rotating shaft; 604. Drive wheel; 605. Guide rail ring; 7. Adjustment component; 701. Cam; 702. Moving plate; 703. Protruding plate; 7 04. Gear; 705. Tooth plate; 706. Pulley; 707. Sprocket; 708. Chain; 8. Fixing assembly; 801. First snap-fit ​​plate; 802. Second snap-fit ​​plate; 803. Protective shell; 804. Electric push rod; 805. Snap-fit ​​shell; 9. Support wheel; 10. Crossbar; 11. Hydraulic rod; 12. Water baffle shell; 13. Support base; 14. First spring; 15. Vertical plate; 16. Vertical rod; 17. Second spring; 18. Bracket. Detailed Implementation

[0030] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0031] Please see Figures 1-8This invention relates to a mold assembly for rotational molding of a floor scrubber, comprising a base 1, a processing table 2 on top of the base 1, and a bottom mold 3 and a top mold 4 on top of the processing table 2; a cooling assembly 5 on top of the base 1, comprising a water tank 501 mounted on top of the base 1, a pressurized water pump 502 connected to one side of the water tank 501, a delivery hose 503 connected to the outlet of one side of the pressurized water pump 502, a support pipe 504 connected to the other end of the delivery hose 503, and a nozzle 505 connected to the surface of the support pipe 504; the cooling assembly 5 enables rapid demolding of the bottom mold 3 and the top mold 4; and a drive assembly 6 on top of the base 1, comprising a support plate 60 mounted on top of the processing table 2. 1. A drive motor 602 is installed on one side of the support plate 601, two sets of rotating shafts 603 are movably connected inside the support plate 601, a drive wheel 604 is installed on the surface of the rotating shaft 603, and a guide rail ring 605 is installed on one side of the bottom mold 3 and the top mold 4. The drive assembly 6 improves the uniformity of the model forming. An adjustment assembly 7 is provided on the top of the processing table 2. The adjustment assembly 7 includes a cam 701 installed on the surface of the rotating shaft 603, a moving plate 702 slidably connected to one side of the cam 701, a convex plate 703 installed on one side of the moving plate 702, a gear 704 installed on the surface of the support tube 504, and a toothed plate 705 meshing with one side of the gear 704. The angle of the spray cooling is adjusted by the adjustment assembly 7.

[0032] Specifically: the bottom mold 3 and the top mold 4 cooperate to form a complete molding cavity, which is used to contain plastic raw materials and mold the floor scrubber parts through rotational molding. The water tank 501 is used to store the cooling medium and provide a sufficient water supply for the cooling process. The pressurized water pump 502 is used to pressurize the cooling water to ensure that the spray system has sufficient pressure and flow to achieve effective cooling. The delivery hose 503 is used to connect the water pump and the spray pipeline. The support pipe 504 serves as the main pipeline of the spray system, used to distribute the cooling water flow and supply water to multiple nozzles 505. The nozzles 505 are used to atomize or spray the cooling water onto the mold surface, helping the product shrink and demold through rapid cooling. The support plate 601 provides mounting support for the drive motor 602 and the rotating shaft 603, forming the structural frame of the drive assembly 6. The drive motor 602 provides power for the rotational movement of the mold, and the uniform coating required for rotational molding is achieved by controlling the rotational speed. The rotating shaft 603 is used to transmit power. The torque of the drive motor 602 is distributed to the drive wheel 604. The drive wheel 604, through its cooperation with the guide ring 605, converts the rotational motion into the circumferential rotation of the mold. The guide ring 605 is installed on the side of the mold and meshes or rubs against the drive wheel 604, guiding the mold to rotate along a fixed trajectory. The cam 701 is installed on the rotating shaft 603 and converts the rotational motion into periodic reciprocating motion to drive the adjustment mechanism. The moving plate 702 contacts the cam 701 and converts the contour motion of the cam 701 into its own linear reciprocating motion. The convex plate 703 is fixed on the moving plate 702 and pushes the pulley 706 to produce vertical displacement through its specific contour. The gear 704 is fixed on the support tube 504 and converts the linear motion into the rotational motion of the support tube 504 through its meshing with the toothed plate 705. The toothed plate 705 meshes with the gear 704 and moves linearly under the push of the convex plate 703, thereby driving the gear 704 to rotate. Example

[0033] Please see Figures 1-8 Based on Embodiment 1, a pulley 706 is movably connected to the bottom of the toothed plate 705. The bottom of the pulley 706 contacts the convex plate 703. The output end of the drive motor 602 is fixedly connected to the rotating shaft 603. The drive assembly 6 also includes sprockets 707 mounted on the surfaces of the two sets of rotating shafts 603 and chains 708 meshing with the surfaces of the sprockets 707. A fixing assembly 8 is provided on the top of the processing table 2. The fixing assembly 8 includes a first snap-fit ​​plate 801 mounted on both sides of the bottom mold 3, a second snap-fit ​​plate 802 mounted on both sides of the top mold 4, a protective shell 803 mounted on one side of the bottom mold 3, an electric push rod 804 mounted inside the protective shell 803, and a snap-fit ​​shell 805 mounted on the output end of the electric push rod 804. The snap-fit ​​shell 805 has a snap-fit ​​groove inside, which is used to push the first snap-fit ​​plate 801 and the second snap-fit ​​plate 802 to abut against each other.

[0034] Specifically: Pulley 706 is installed at the bottom of toothed plate 705, smoothly transmitting the thrust of convex plate 703 to toothed plate 705 and reducing motion friction; sprocket 707 is installed on rotating shaft 603, achieving synchronous transmission between multiple shafts through chain 708; chain 708 connects two sprockets 707, ensuring that multiple drive wheels 604 rotate synchronously to maintain mold motion balance; first locking plate 801 is fixed on both sides of bottom mold 3, used to cooperate with fixing component 8 to achieve positioning and locking of the lower half of mold; second locking plate 802 is fixed on both sides of top mold 4, used for... The upper part of the mold is positioned and locked in conjunction with the fixing component 8. The protective shell 803 is installed on the side of the bottom mold 3 to accommodate and protect the electric push rod 804. The electric push rod 804 provides linear thrust to drive the locking shell 805 to perform the locking and releasing action of the mold. The locking shell 805 is connected to the electric push rod 804 and locks the first locking plate 801 and the second locking plate 802 simultaneously through the internal locking groove to achieve mold closure and locking. The support wheel 9 contacts the inner surface of the guide rail ring 605 to provide auxiliary support for the rotating mold and reduce frictional resistance. Example

[0035] Please see Figures 1-8 Based on Embodiments 1 and 2, a support wheel 9 is slidably connected inside the guide rail ring 605, and a crossbar 10 is fixedly connected inside the support wheel 9. The surface of the crossbar 10 is movably connected to the inner wall of the support plate 601 through a bearing. A hydraulic rod 11 is movably connected to the top of the base 1, and the output end of the hydraulic rod 11 is movably connected to the processing table 2. A water baffle shell 12 is fixedly connected to the top of the processing table 2. A support seat 13 is fixedly connected to one side of the water baffle shell 12. A first spring 14 is fixedly connected to one side of the support seat 13. A vertical plate 15 is slidably connected to one side of the toothed plate 705. A vertical rod 16 is provided through the bottom of the vertical plate 15. The bottom of the vertical rod 16 is fixedly connected to the toothed plate 705. A second spring 17 is sleeved on the surface of the vertical rod 16. A bracket 18 is movably connected to the surface of the support tube 504. The bottom of the bracket 18 is fixedly connected to the processing table 2, and one side of the vertical plate 15 is fixedly connected to the bracket 18.

[0036] Specifically: the crossbar 10 connects the support wheel 9 and the support plate 601, transferring the load of the support wheel 9 to the fixed structure; the hydraulic rod 11 is installed between the base 1 and the processing table 2, adjusting the tilt angle of the processing table 2 through telescopic movement to optimize the flow of raw materials; the water baffle 12 is installed on the processing table 2 to collect the water splashed during the cooling spray and guide its discharge; the support base 13 connects the water baffle 12 and the processing table 2, providing fixed support for the water baffle 12; the first spring 14 is installed between the support base 13 and the water baffle 12, providing buffer to absorb the vibration generated by the water flow impact; the vertical plate 15 is fixed on the bracket 18, providing guidance for the vertical movement of the toothed plate 705; the vertical rod 16 connects the toothed plate 705 and the second spring 17, transmitting the movement of the toothed plate 705 to the reset mechanism; the second spring 17 is sleeved on the vertical rod 16, providing a reset force for the toothed plate 705 so that it returns to its initial position after the protrusion plate 703 disengages.

[0037] The working principle of this invention is as follows: The operator lifts the top mold 4 using an external lifting device and puts the molding material into the molding cavity inside the bottom mold 3. Then, the operator controls the external lifting device to lower the top mold 4 so that the bottom mold 3 fits into the top mold 4. Then, the operator starts the electric push rod 804 through the external controller. The electric push rod 804 drives the snap-fit ​​shell 805 to move. The snap-fit ​​shell 805 is fitted onto the surface of the first snap-fit ​​plate 801 and the second snap-fit ​​plate 802, thereby closing and fixing the bottom mold 3 and the top mold 4.

[0038] The heaters inside the top mold 4 and bottom mold 3 are activated to melt the molding material. At the same time, the drive motor 602 is activated. The drive motor 602, together with the rotating shaft 603, drives the drive wheel 604 to rotate. The drive wheel 604, together with the guide ring 605, drives the bottom mold 3 and top mold 4 to rotate, so that the molten material can be evenly covered in the molding cavity. Then, the four sets of hydraulic rods 11 at the bottom of the processing table 2 are activated alternately. When the four sets of hydraulic rods 11 are activated alternately, they can push the processing table 2 to tilt, improve the fluidity of the molten material inside the top mold 4 and bottom mold 3, and further improve the molding effect.

[0039] After rotational molding, the pressurized water pump 502 is started, drawing water from the water tank 501 into the delivery hose 503. The water is then sprayed out through the support pipe 504 and the nozzle 505 onto the surfaces of the top mold 4 and the bottom mold 3, cooling the mold surfaces. Then, the drive motor 602 is started, rotating the rotating shaft 603 and simultaneously rotating the cam 701. The cam 701 pushes the moving plate 702 and the convex plate 703 to move. The convex plate 703 pushes the pulley 706 upwards. The pulley 706, in conjunction with the toothed plate 705, drives the gear 704 to rotate. The gear 704, in conjunction with the support pipe 504, drives the nozzle 505 to rotate, ensuring the water is evenly distributed across the surfaces of the top mold 4 and the bottom mold 3, improving the cooling effect. As the external temperature of the mold gradually decreases, the mold surface shrinks, enabling rapid demolding and improving the demolding effect.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mold assembly for rotational molding of a floor scrubber, comprising a base (1), characterized in that: The base (1) is provided with a processing table (2) on top, and the processing table (2) is provided with a bottom mold (3) and a top mold (4) on top. The base (1) is provided with a cooling component (5) on top. The cooling component (5) includes a water tank (501) installed on the top of the base (1), a pressurized water pump (502) connected to one side of the water tank (501), a delivery hose (503) connected to the outlet of the pressurized water pump (502), a support pipe (504) connected to the other end of the delivery hose (503), and a nozzle (505) connected to the surface of the support pipe (504). The cooling component (5) is used to quickly demold the bottom mold (3) and the top mold (4). The base (1) is provided with a drive assembly (6) on top. The drive assembly (6) includes a support plate (601) installed on the top of the processing table (2), a drive motor (602) installed on one side of the support plate (601), two sets of rotating shafts (603) movably connected inside the support plate (601), a drive wheel (604) installed on the surface of the rotating shaft (603), and a guide rail ring (605) installed on one side of the bottom mold (3) and the top mold (4). The drive assembly (6) improves the uniformity of model forming. The processing table (2) is provided with an adjustment component (7) on top. The adjustment component (7) includes a cam (701) mounted on the surface of the rotating shaft (603), a movable plate (702) slidably connected to one side of the cam (701), a convex plate (703) mounted on one side of the movable plate (702), a gear (704) mounted on the surface of the support tube (504), and a toothed plate (705) meshing with one side of the gear (704). The angle of spray cooling is adjusted by the adjustment component (7).

2. The mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: The bottom of the toothed plate (705) is movably connected to a pulley (706), the bottom of the pulley (706) is in contact with the convex plate (703), and the output end of the drive motor (602) is fixedly connected to the rotating shaft (603).

3. The mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: The drive assembly (6) also includes sprockets (707) mounted on the surfaces of two sets of rotating shafts (603) and chains (708) meshing with the surfaces of the sprockets (707).

4. The mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: The processing table (2) is provided with a fixing component (8) on the top. The fixing component (8) includes a first snap-fit ​​plate (801) installed on both sides of the bottom mold (3), a second snap-fit ​​plate (802) installed on both sides of the top mold (4), a protective shell (803) installed on one side of the bottom mold (3), an electric push rod (804) installed inside the protective shell (803), and a snap-fit ​​shell (805) installed at the output end of the electric push rod (804).

5. A mold assembly for rotational molding of a floor scrubber according to claim 4, characterized in that: The snap-fit ​​housing (805) has a snap-fit ​​groove inside, which is used to push the first snap-fit ​​plate (801) and the second snap-fit ​​plate (802) to abut against each other.

6. The mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: The guide rail ring (605) has a support wheel (9) slidably connected inside, and a crossbar (10) is fixedly connected inside the support wheel (9). The surface of the crossbar (10) is movably connected to the inner wall of the support plate (601) through a bearing.

7. A mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: The base (1) is movably connected to a hydraulic rod (11) at its top, and the output end of the hydraulic rod (11) is movably connected to the processing table (2).

8. A mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: A water baffle shell (12) is fixedly connected to the top of the processing table (2), a support base (13) is fixedly connected to one side of the water baffle shell (12), and a first spring (14) is fixedly connected to one side of the support base (13).

9. A mold assembly for rotational molding of a floor scrubber according to claim 1, characterized in that: A vertical plate (15) is slidably connected to one side of the toothed plate (705). A vertical rod (16) is provided through the bottom of the vertical plate (15). The bottom of the vertical rod (16) is fixedly connected to the toothed plate (705). A second spring (17) is sleeved on the surface of the vertical rod (16).

10. A mold assembly for rotational molding of a floor scrubber according to claim 9, characterized in that: The support tube (504) is movably connected to a bracket (18), the bottom of the bracket (18) is fixedly connected to the processing table (2), and one side of the vertical plate (15) is fixedly connected to the bracket (18).

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