An automatic opening and closing clamping device for rotational molding molds

Abstract

This utility model discloses an automatic opening and closing clamping device for rotational molding molds, belonging to the field of rotational molding mold technology. It includes a lower rotational molding mold and an upper rotational molding mold positioned above it. Two sets of opening and closing clamping rods are fixedly connected to the bottom surface of the upper rotational molding mold. The bottom end of each set of clamping rods penetrates the lower rotational molding mold and extends to its lower part. A baffle plate is fixedly connected to the outer surface of each set of clamping rods. Two fitting grooves are formed in the inner bottom wall of the lower rotational molding mold. This automatic opening and closing clamping device, through the cooperation of the lower and upper rotational molding molds, the opening and closing clamping rods, and the baffle plate, facilitates the automatic opening and closing clamping of the upper rotational molding mold. Furthermore, the cooperation of the fitting grooves, sliding grooves, lifting arc plates, and sliding holes facilitates the pulling and demolding of the finished parts adsorbed in the lower rotational molding mold, thereby reducing deformation of the processed finished products and improving the quality of the finished products processed by the rotational molding mold.

Description

Technical Field

[0001] This application belongs to the field of rotational molding technology, and particularly relates to an automatic opening and closing clamping device for rotational molding. Background Technology

[0002] Rotational molding is a process for molding hollow plastic products. It involves adding a metered amount of liquid or powdered plastic into a mold, closing the mold and rotating it while simultaneously heating it. The plastic material inside the mold melts and adheres evenly to the inner surface of the mold cavity under the action of gravity and heat, thus forming a shape that matches the mold cavity. After cooling, the product is demolded to obtain the desired hollow product.

[0003] The existing utility model with authorization announcement number CN221291997U discloses an automatic opening and closing clamping device for rotational molding, including an upper mold and a lower mold. The upper mold is provided with an upper mold frame, and the lower mold is provided with a lower mold frame. It includes an opening and closing mechanism and multiple clamping mechanisms. The opening and closing mechanism includes at least two opening and closing drive cylinders.

[0004] The above technical solution has a simple structure and is easy to operate. It not only realizes the automatic opening and closing of the rotational molding mold, but also the automatic clamping of the mold and the automatic assisted demolding of the rotational molded product. It can save a lot of manpower and time, and make rotational molding production more efficient and convenient. However, the above technical solution uses the automatic opening and closing clamping device to open the upper mold of the rotational molding mold, while at the same time it uses the demolding drive cylinder to demold the finished product in the lower mold. The extension end of the demolding drive cylinder of the automatic opening and closing clamping device directly pushes the finished product, which can easily cause deformation of the processed finished product, thereby affecting the quality of the processed finished product of the rotational molding mold.

[0005] To address this issue, we propose an automatic opening and closing clamping device for rotational molding dies. Utility Model Content

[0006] The purpose of this application is to solve the problem in the prior art that the finished product in the rotational molding mold cannot be demolded relatively stably, and to propose an automatic opening and closing clamping device for rotational molding mold.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic opening and closing clamping device for rotational molding molds includes a lower rotational molding mold and an upper rotational molding mold above it. Two sets of opening and closing clamping rods are fixedly connected to the bottom surface of the upper rotational molding mold. The bottom end of each set of opening and closing clamping rods penetrates the lower rotational molding mold and extends to its lower part. A baffle is fixedly connected to the outer surface of each set of opening and closing clamping rods. Two fitting grooves are formed in the inner bottom wall of the lower rotational molding mold. Two sliding grooves are formed in the inner bottom wall of each fitting groove. The two sets of baffles are slidably connected inside the two sliding grooves. A lifting arc plate is slidably connected inside each fitting groove. The upper surface of each lifting arc plate contacts the bottom surface of the upper rotational molding mold. Two sliding holes are formed on the upper surface of each lifting arc plate. The two sets of opening and closing clamping rods are slidably connected inside the two sets of sliding holes.

[0009] Preferably, a pressing cover is fitted around the upper rotational molding die, and two sets of extension plates are fixedly connected to the outer surface of the pressing cover.

[0010] Preferably, a positioning telescopic rod is fixedly connected to the upper surface of each set of extension plates, and a positioning pin is fixedly connected to the telescopic end of each set of positioning telescopic rods. The ends of the two sets of positioning pins that are close to each other penetrate the pressing cover and extend into the interior of the upper rotational molding mold.

[0011] Preferably, a lower base plate is provided below both sets of extension plates, and two sets of support platforms are fixedly connected to the upper surface of the lower base plate. Each set of support platforms is fixedly connected to the upper surface of a lifting telescopic rod, and the telescopic ends of the two sets of lifting telescopic rods are fixedly connected to the bottom surface of the two sets of extension plates respectively.

[0012] Preferably, two rolling motors are fixedly connected to the upper surface of the lower base plate, and two auxiliary structures are fixedly connected to both sides of the lower rotational molding die and both sides of the upper rotational molding die. The ends of the two auxiliary structures that are far apart from each other are fixedly connected to the output ends of the two rolling motors respectively.

[0013] Preferably, each of the rolling motors is fixedly connected to a stabilizing bearing at its output end, and each stabilizing bearing is fixedly connected to a support column on its outer ring. The bottom end of each support column is fixedly connected to the upper surface of the lower base plate.

[0014] Preferably, each of the support columns has two reinforcing rods fixedly connected to its outer surface, and the bottom end of each set of reinforcing rods is fixedly connected to the upper surface of the lower base plate.

[0015] Preferably, a reinforcing ring is fixedly connected to the outer surface of each set of reinforcing rods, and the bottom surface of each set of reinforcing rings is fixedly connected to the upper surface of the lower base plate.

[0016] In summary, the technical effects and advantages of this application are as follows: By configuring a lower rotational molding mold, an upper rotational molding mold, an opening and closing clamping rod, and a stop plate, when the upper rotational molding mold is lifted directly above the lower rotational molding mold using an automatic opening and closing clamping device, the opening and closing clamping rod and the stop plate fixed below the upper rotational molding mold will slide within the lower rotational molding mold. This facilitates the positioning of the automatic opening and closing clamping of the upper rotational molding mold. Furthermore, by utilizing the fit groove, sliding groove, lifting arc plate, and sliding hole, the automatic opening and closing clamping device can be used to pull the upper rotational molding mold upwards, causing the stop plate to slide within the sliding groove and the opening and closing clamping rod to slide within the sliding hole until the stop plate contacts the bottom surface of the lifting arc plate. This allows the lifted upper rotational molding mold to move upwards along with the lifting arc plate within the fit groove, facilitating the removal of the finished part adsorbed within the lower rotational molding mold. This reduces deformation of the processed finished product and improves the quality of the finished product processed by the rotational molding mold. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the lifting telescopic rod of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the lower rotational molding die of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the lifting arc plate of this utility model;

[0020] Figure 4 This is a three-dimensional bottom view of the rotational molding mold of this utility model.

[0021] In the diagram: 1. Lower rotational molding mold; 2. Upper rotational molding mold; 3. Opening and closing clamping rod; 4. Baffle plate; 5. Fitting groove; 6. Sliding groove; 7. Lifting arc plate; 8. Sliding hole; 9. Pressing cover; 10. Extension plate; 11. Lifting telescopic rod; 12. Support platform; 13. Positioning telescopic rod; 14. Positioning pin; 15. Auxiliary structure; 16. Rolling motor; 17. Support column; 18. Stabilizing bearing; 19. Reinforcing rod; 20. Reinforcing ring; 21. Lower base plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4An automatic opening and closing clamping device for rotational molding molds includes a lower rotational molding mold 1, an upper rotational molding mold 2 above the lower rotational molding mold 1, and a clamping cover 9 fitted on the outside of the upper rotational molding mold 2. Two sets of extension plates 10 are fixedly connected to the outer surface of the clamping cover 9. By using the clamping cover 9, the upper rotational molding mold 2 on the lower rotational molding mold 1 can be squeezed by downward pressure, so as to automatically open and close the rotational molding mold.

[0024] Each set of extension plates 10 has a fixedly connected positioning telescopic rod 13 on its upper surface. Each set of positioning telescopic rods 13 has a fixedly connected positioning pin 14 at its telescopic end. The ends of the two sets of positioning pins 14 that are close to each other pass through the pressing cover 9 and extend into the interior of the upper rotational molding mold 2. By controlling the positioning telescopic rod 13, the positioning pin 14 can be conveniently used to pass through the pressing cover 9 to the outer surface of the upper rotational molding mold 2, thereby facilitating the positioning of the upper rotational molding mold 2 inside the pressing cover 9. This also facilitates the lifting of the upper rotational molding mold 2 by lifting the pressing cover 9 to demold the finished product inside.

[0025] Two sets of opening and closing clamping rods 3 are fixedly connected to the bottom surface of the upper rotational molding mold 2. The bottom end of each set of opening and closing clamping rods 3 passes through the lower rotational molding mold 1 and extends to the bottom of the lower rotational molding mold 1. A baffle 4 is fixedly connected to the outer surface of each set of opening and closing clamping rods 3. A lower base plate 21 is provided below the two sets of extension plates 10. Two sets of support platforms 12 are fixedly connected to the upper surface of the lower base plate 21. A lifting telescopic rod 11 is fixedly connected to the upper surface of each set of support platforms 12. The telescopic ends of the two sets of lifting telescopic rods 11 are fixedly connected to the bottom surface of the two sets of extension plates 10 respectively. By using the multiple support platforms 12 fixed on the lower base plate 21, the lifting telescopic rod 11 can be installed in the required position to provide power to the automatic opening and closing clamping device of the rotational molding mold.

[0026] The lower rotational molding die 1 has two fitting grooves 5 on its inner bottom wall, and each fitting groove 5 has two sliding grooves 6 on its inner bottom wall. Two sets of baffles 4 are slidably connected to the inside of the two sliding grooves 6. Two rolling motors 16 are fixedly connected to the upper surface of the lower base plate 21. Two auxiliary structures 15 are fixedly connected to both sides of the lower rotational molding die 1 and both sides of the upper rotational molding die 2. The auxiliary structure 15 includes two sets of blocks that can be squeezed together, two twisting bolts, and motor parts. By controlling the motor, the bolts can be easily driven to rotate to connect the corresponding blocks, thereby assisting in the automatic opening and closing of the lower rotational molding die 1 and the upper rotational molding die 2. The ends of the two auxiliary structures 15 that are far apart from each other are fixedly connected to the output ends of the two rolling motors 16. The auxiliary structures 15 are used to assist the automatic opening and closing of the rotational molding die, while the rolling motors 16 can drive the rotational molding die to rotate and process the workpiece.

[0027] Each fitting groove 5 has a slidingly connected lifting arc plate 7 inside. The upper surface of each lifting arc plate 7 is in contact with the bottom surface of the upper rotational molding mold 2. The output end of each rolling motor 16 is fixedly connected to a stabilizing bearing 18. The outer ring of each stabilizing bearing 18 is fixedly connected to a support column 17. The bottom end of each support column 17 is fixedly connected to the upper surface of the lower base plate 21. By using the support column 17, the stabilizing bearing 18 can be fixed to the output end of the rolling motor 16, thereby improving the rotational stability of the rotational molding mold.

[0028] Each lifting arc plate 7 has two sliding holes 8 on its upper surface. Two sets of opening and closing clamping rods 3 are slidably connected to the inside of the two sets of sliding holes 8. Two reinforcing rods 19 are fixedly connected to the outer surface of each support column 17. The bottom end of each set of reinforcing rods 19 is fixedly connected to the upper surface of the lower base plate 21. The reinforcing rods 19 are used to improve the support stability of the support column 17, thereby improving the stability of the device.

[0029] Each set of reinforcing rods 19 has a reinforcing ring 20 fixedly connected to its outer surface. The bottom surface of each set of reinforcing rings 20 is fixedly connected to the upper surface of the lower base plate 21. The reinforcing rings 20 are fixed at the connection between the reinforcing rods 19 and the lower base plate 21, thereby further improving the stability of the device.

[0030] The working principle of this utility model is as follows: In use, first connect the lifting telescopic rod 11, the positioning telescopic rod 13, the auxiliary structure 15, and the rolling motor 16 to the power supply. When the automatic opening and closing clamping device is needed to open and close the rotational molding mold and process the finished product, first manually place the lower base plate 21 of the automatic opening and closing clamping device in the required position, thus enabling stable processing of the finished product using the rotational molding mold. Then, by controlling the power supply of the lifting telescopic rod 11 fixed on the support platform 12, the lifting telescopic rod 11 can move downwards with the extension plate 10 and the pressing cover 9 until the inner wall of the pressing cover 9 contacts and presses against the outer surface of the upper rotational molding mold 2 on the lower rotational molding mold 1, thereby enabling the lower rotational molding mold 1 to... The upper rotomolding mold 2 is automatically pressed together. At the same time, by controlling the auxiliary structures 15 set on both sides of the lower rotomolding mold 1 and the upper rotomolding mold 2, the motor of the auxiliary structure 15 can rotate the bolts to facilitate the auxiliary pressing of the lower rotomolding mold 1 and the upper rotomolding mold 2. Then, the raw material for the finished product is manually transported to the lower rotomolding mold 1 and the upper rotomolding mold 2 through the pipe connected to the outside of the upper rotomolding mold 2. By controlling the power supply of the rolling motor 16, the rolling motor 16 can drive the auxiliary structure 15 to roll the lower rotomolding mold 1 and the upper rotomolding mold 2. The stabilizing bearing 18 fixed to the output end of the rolling motor 16 improves the rotational stability of the lower rotomolding mold 1 and the upper rotomolding mold 2, thereby facilitating the processing of finished products using the rotomolding mold.

[0031] After processing, the automatic opening and closing can be achieved by controlling the power supply of the motor of the auxiliary structure 15. By controlling the power supply of the positioning telescopic rod 13, the positioning pin 14 can be driven to pass through the pressing cover 9 and lock onto the outer surface of the upper rotational molding mold 2, thereby positioning the upper rotational molding mold 2 inside the pressing cover 9. By controlling the power supply of the lifting telescopic rod 11, the extension plate 10 can be driven to move upward, thereby using the pressing cover 9 to move the upper rotational molding mold 2 upward. Since the opening and closing clamping rod 3 fixed under the upper rotational molding mold 2 slides with the baffle 4 in the sliding groove 6 until the baffle 4 contacts the bottom surface of the lifting arc plate 7 in the fitting groove 5, the lifting arc plate 7 can be moved upward to demold the finished product adsorbed on the inner wall of the lower rotational molding mold 1. Automatic opening and closing can also be achieved, thereby improving the quality of the finished product processed by the rotational molding mold.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic opening and closing and pressing device for a roto-molding mold, comprising a lower roto-molding mold (1), characterized in that: An upper rotational molding mold (2) is provided above the lower rotational molding mold (1). Two sets of opening and closing clamping rods (3) are fixedly connected to the bottom surface of the upper rotational molding mold (2). The bottom end of each set of opening and closing clamping rods (3) passes through the lower rotational molding mold (1) and extends to the bottom of the lower rotational molding mold (1). A baffle (4) is fixedly connected to the outer surface of each set of opening and closing clamping rods (3). Two fitting grooves (5) are opened in the inner bottom wall of the lower rotational molding mold (1). Each fitting groove (5) has... Two sliding grooves (6) are provided on the inner bottom wall. The two sets of baffles (4) are slidably connected to the inside of the two sliding grooves (6). A lifting arc plate (7) is slidably connected inside each of the fitting grooves (5). The upper surface of each lifting arc plate (7) is in contact with the bottom surface of the upper rotational molding mold (2). Two sliding holes (8) are provided on the upper surface of each lifting arc plate (7). The two sets of opening and closing clamping rods (3) are slidably connected to the inside of the two sets of sliding holes (8).

2. The automatic opening and closing and pressing device for roto-molding mold according to claim 1, characterized in that: The upper rotational molding mold (2) is fitted with a pressing cover (9), and two sets of extension plates (10) are fixedly connected to the outer surface of the pressing cover (9).

3. The automatic opening and closing and pressing device for roto-molding mold according to claim 2, characterized in that: Each set of extension plates (10) has a fixedly connected positioning telescopic rod (13) on its upper surface. Each set of positioning telescopic rods (13) has a fixedly connected positioning pin (14) at its telescopic end. The two sets of positioning pins (14) have their ends close to each other, passing through the pressing cover (9) and extending into the interior of the upper rotational molding mold (2).

4. The automatic opening and closing and pressing device for roto-molding mold according to claim 2, characterized in that: A lower base plate (21) is provided below both sets of extension plates (10). Two sets of support platforms (12) are fixedly connected to the upper surface of the lower base plate (21). A lifting telescopic rod (11) is fixedly connected to the upper surface of each set of support platforms (12). The telescopic ends of the two sets of lifting telescopic rods (11) are fixedly connected to the bottom surface of the two sets of extension plates (10).

5. The automatic opening and closing and pressing device for roto-molding mold according to claim 4, characterized in that: Two rolling motors (16) are fixedly connected to the upper surface of the lower base plate (21). Two auxiliary structures (15) are fixedly connected to both sides of the lower rotomolding mold (1) and both sides of the upper rotomolding mold (2). The ends of the two auxiliary structures (15) that are far apart from each other are fixedly connected to the output ends of the two rolling motors (16).

6. The automatic opening and closing clamping device for rotational molding die according to claim 5, characterized in that: Each of the rolling motors (16) has a fixed connection to a stabilizing bearing (18) at its output end, and a support column (17) is fixedly connected to the outer ring of each of the stabilizing bearings (18). The bottom end of each support column (17) is fixedly connected to the upper surface of the lower base plate (21).

7. The automatic opening and closing and pressing device for roto-molding mold according to claim 6, characterized in that: Two reinforcing rods (19) are fixedly connected to the outer surface of each of the support columns (17), and the bottom end of each set of reinforcing rods (19) is fixedly connected to the upper surface of the bottom plate (21).

8. The automatic opening and closing and pressing device for roto-molding mold according to claim 7, characterized in that: Each set of reinforcing rods (19) has a reinforcing ring (20) fixedly connected to its outer surface, and the bottom surface of each set of reinforcing rings (20) is fixedly connected to the upper surface of the bottom plate (21).

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