A rotational molding machine for producing street lamp covers

Abstract

This utility model belongs to the field of rotational molding technology, specifically a rotational molding machine for producing street lamp covers. It includes a loading assembly for mounting the core components of the rotational molding machine, a receiving assembly on the loading assembly that can drive the street lamp cover mold in compound motion, a positioning assembly on the receiving assembly that can fix the street lamp cover mold, and a temperature control assembly on the loading assembly that can adjust the temperature of the street lamp cover mold. This utility model facilitates the use of a clamping component within a rotating drum that can swing synchronously with the swing table and rotate independently. This clamping component can stably hold and fix the mold using a pad, and can also allow the mold to easily move due to external force using a first universal ball joint. This allows the rotational molding machine to significantly improve production continuity while ensuring finished product quality and reducing the safety risks for operators when removing workpieces.

Description

Technical Field

[0001] This utility model belongs to the field of rotational molding production technology, specifically relating to a rotational molding machine for producing street lamp covers. Background Technology

[0002] Streetlight covers typically need to meet requirements such as lightweight, impact resistance, and UV protection, and some designs include curved surfaces or irregular shapes. For streetlight cover production, the rotational molding machine, which uses a cycle of hot melting, rotation, and cooling to evenly adhere plastic raw materials to the inner wall of the mold and ultimately form a hollow plastic product, is a key piece of equipment for manufacturing complex-shaped, large, hollow lamp cover products with high weather resistance requirements.

[0003] Chinese patent document with authorization announcement number CN223013709U discloses a fully automatic rotational molding device. By setting a hinged first mold and a second mold in the lower box, together with a first fixing block, a second fixing block and a locking block, it can achieve rapid mold closing with a simple structure, and can also ensure the stability of mold rotation during rotational molding.

[0004] However, in the existing technology, the structural design of integrating the mold that rotates around a single axis into an openable box increases the risk for operators to remove the workpiece and is not conducive to the full flow of raw materials in the mold and the continuous production of workpieces. Therefore, a rotational molding machine for producing street lamp covers is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a rotational molding machine for producing street lamp covers.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A rotational molding machine for producing street lamp covers includes a loading assembly on which the core components of the rotational molding machine can be installed. The loading assembly is provided with a receiving assembly that can drive the street lamp cover mold to perform compound movements. The receiving assembly is provided with a positioning assembly that can fix the street lamp cover mold. The loading assembly is also provided with a temperature control assembly that can adjust the temperature of the street lamp cover mold.

[0008] The loading assembly includes a base on which a swing table is movably mounted;

[0009] The housing components include a rotating cylinder that is movably mounted above the display stand;

[0010] The positioning components include a clamping member that allows the lampshade mold to move conveniently within the rotating drum along its length, a pushing member that can clamp the lampshade mold with the clamping member after translation, and an adjusting member that can adjust the position of the pushing member as needed;

[0011] The clamping component includes multiple telescopic rods fixedly connected to the inner side of the rotating drum. A clamping frame is fixedly connected between the telescopic ends of the telescopic rods, which are of the same height and longitudinal position. Multiple insert rods are movably connected to the clamping frame. A compression spring is movably connected to the outer side of the insert rod. A first universal ball is fixedly connected to one end of the insert rod. A pad is fixedly installed on the side of the clamping frame away from the telescopic rods.

[0012] Preferably, the pusher includes two translation rings movably connected to the outer surface of the rotating drum, and wedges are provided between the clamping frame and the multiple translation rings.

[0013] Preferably, the adjusting component includes a translation frame disposed above the translation ring, an electric push rod fixedly connected to one side of the translation frame, and multiple second universal balls fixedly connected to the translation frame on both sides of the translation ring.

[0014] Preferably, the base and the display stand are rotatably connected.

[0015] Preferably, multiple clamping frames are arranged at equal angular intervals around the axis of the rotating cylinder.

[0016] Preferably, the clamping frame and the compression spring are slidably connected to the insertion rod, and the translation ring and the wedge are slidably connected to the rotating drum.

[0017] Preferably, both ends of the clamping frame are integrally formed with inclined portions that match the wedge blocks.

[0018] Preferably, both sides of the translation ring are integrally formed with grooves that match the rolling part of the second universal ball.

[0019] The beneficial effects of this utility model are as follows: by setting up a clamping component inside a rotating drum that can swing synchronously with the swing table and rotate independently, which can both stably clamp and fix the mold through the pad and allow the mold to be easily moved by external force through the first universal ball, this rotational molding machine can significantly improve production continuity and reduce the safety risks for operators when removing workpieces, while ensuring the quality of finished products. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a rotational molding machine for producing street lamp covers according to the present invention;

[0022] Figure 2 This is a schematic diagram of the main structure of a rotational molding machine for producing street lamp covers according to the present invention;

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure at point A;

[0024] Figure 4 yes Figure 1 Schematic diagram of some component structures;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure of some components from another perspective.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Loading assembly; 101. Base; 102. Table; 103. Hydraulic cylinder; 104. Frame; 2. Receiving assembly; 201. Support roller; 202. Roller ring; 203. Rotary drum; 204. Gear ring; 205. Gear; 206. Drive unit; 3. Positioning assembly; 301. Telescopic rod; 302. Clamping frame; 303. Insert rod; 304. Compression spring; 305. First universal ball joint; 306. Pad; 307. Translation ring; 308. Wedge block; 309. Translation frame; 310. Electric push rod; 311. Second universal ball joint; 4. Temperature control assembly; 401. Pipe seat; 402. Air inlet pipe; 403. Nozzle; 404. Arc frame; 405. Heating tube. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0031] like Figures 1-5 As shown, a rotational molding machine for producing street lamp covers includes a loading assembly 1 on which the core components of the rotational molding machine can be installed. The loading assembly 1 is provided with a receiving assembly 2 that can drive the street lamp cover mold to perform compound movements. The receiving assembly 2 is provided with a positioning assembly 3 that can fix the street lamp cover mold. The loading assembly 1 is also provided with a temperature control assembly 4 that can adjust the temperature of the street lamp cover mold.

[0032] In this embodiment: the loading component 1 includes a base 101, a swing table 102 is movably mounted on the base 101, and hydraulic cylinders 103 are movably connected to the swing table 102 in front and rear of one side of the base 101. A frame 104 is fixedly mounted on the top of the swing table 102.

[0033] The base 101 is rotatably connected to the swing platform 102, and both the base 101 and the swing platform 102 are rotatably connected to the hydraulic cylinder 103.

[0034] The swing platform 102 mounted on the base 101 is driven to rotate relative to the base 101 by a certain range through the hydraulic cylinder 103 with a variable telescopic end. The swing platform 102 provides installation positions for the frame 104, some of the support rollers 201, drive unit 206, tube seat 401, etc., and the frame 104 provides installation positions for the electric push rod 310, arc frame 404, some of the support rollers 201, etc.

[0035] In this embodiment: the receiving component 2 includes support rollers 201 that are fixedly installed on the front and rear sides of the swing table 102 and on both sides of the frame 104 respectively. Rolling rings 202 are provided between the support rollers 201 with the same lateral position. A rotating cylinder 203 is fixedly installed between the two rolling rings 202. Gear rings 204 are fixedly connected to both ends of the rotating cylinder 203. Gears 205 are meshed below the gear rings 204. A drive unit 206 is fixedly connected to one side of the gear 205.

[0036] The movable range of the rotating drum 203 is limited by the roller 201 and the rolling ring 202 is limited without affecting the rotation of the rotating drum 203 around its own axis under the action of external force. The rotation of the output end of the drive unit 206, which can be composed of a motor, reducer, etc., is transmitted to the rotating drum 203 through the gear 205 and the gear ring 204, so that the rotating drum 203 can rotate above the swing table 102 at the required speed after the drive unit 206 is running.

[0037] In this embodiment: the positioning component 3 includes a clamping member that allows the street lamp cover mold to move conveniently within the rotating cylinder 203 along its length direction, a pushing member that can clamp the street lamp cover mold with the clamping member after translation, and an adjusting member that can adjust the position of the pushing member as needed;

[0038] The clamping component includes multiple telescopic rods 301 fixedly connected to the inner side of the rotating drum 203. A clamping frame 302 is fixedly connected between the telescopic ends of the telescopic rods 301, which have the same height and longitudinal position. Multiple insert rods 303 are movably connected to the clamping frame 302. A compression spring 304 is movably connected to the outer side of the insert rod 303. A first universal ball 305 is fixedly connected to one end of the insert rod 303. A pad 306 is fixedly installed on the side of the clamping frame 302 away from the telescopic rods 301. The pushing component includes two translation rings 307 movably connected to the outer side of the rotating drum 203. A wedge block 308 is provided between the clamping frame 302 and the multiple translation rings 307. The adjusting component includes a translation frame 309 set above the translation rings 307. An electric push rod 310 is fixedly connected to one side of the translation frame 309. Multiple second universal balls 311 are provided on both sides of the translation rings 307 and fixedly connected to the translation frame 309.

[0039] Multiple clamping frames 302 are arranged at equal angular intervals around the axis of the rotating cylinder 203. The clamping frames 302 and the compression springs 304 are slidably connected to the insert rods 303. The translation rings 307 and the wedges 308 are slidably connected to the rotating cylinder 203. Both ends of the clamping frames 302 are integrally formed with inclined portions that fit with the wedges 308. The frame 104 is slidably connected to the translation frame 309. Both sides of the translation ring 307 are integrally formed with grooves that fit with the rolling parts of the second universal ball 311.

[0040] The clamping frame 302 is installed by means of a telescopic rod 301 with built-in elastic elements, which makes the telescopic end of the clamping frame 302 tend to move away from the rod body when it is not subjected to external force. The clamping frame 302 automatically moves towards the axis of the rotating drum 203 when it is not subjected to external force. The movable range of the first universal ball 305 is limited by the insertion rod 303 and the compression spring 304, and makes it tend to move towards the axis of the rotating drum 203 when it is not subjected to external force. The mold is contacted by the pad 306 with a higher coefficient of friction instead of the clamping frame 302. The maximum distance that the clamping frame 302 can move away from the axis of the rotating drum 203 is limited when the translation ring 307 moves along the length direction of the clamping frame 302 by the wedge block 308 that can contact the clamping frame 302. The second universal ball 311, which contacts the translation ring 307 instead of the translation frame 309, transmits the length change of the telescopic end of the electric push rod 310 to the translation ring 307 synchronously with the translation frame 309 without affecting the rotation of the translation ring 307 with the rotating drum 203.

[0041] In this embodiment: the temperature control component 4 includes tube seats 401 fixedly installed in the front and rear of both sides of the swing table 102. An air inlet pipe 402 is fixedly connected between two tube seats 401 with the same longitudinal position. Multiple nozzles 403 facing the rotating drum 203 are fixedly connected on the air inlet pipe 402. An arc-shaped frame 404 located above the rotating drum 203 is fixedly installed below the frame 104. Multiple heating tubes 405 are fixedly installed inside the arc-shaped frame 404. The multiple heating tubes 405 are arranged at equal angles around the center line of the arc-shaped frame 404.

[0042] The air inlet pipe 402, installed below the rotating drum 203 via the pipe seat 401, allows the gas to be evenly sprayed onto the rotating drum 203 along the nozzle 403 when gas of a specific temperature is injected from the outside. By installing multiple heating tubes 405 in the arc-shaped frame 404 above the rotating drum 203, the radiant heat generated by the heating tubes 405 can be transferred to the rotating drum 203 in a more concentrated manner.

[0043] Working principle: When this rotational molding machine is installed and used for the production of street lamp covers, a conveyor platform with a height slightly exceeding that of the swing table 102 can be set on both sides of the base 101 so that the workers can push the street lamp cover mold placed on the conveyor platform into the rotating drum 203, or unload the street lamp cover mold in the rotating drum 203 onto one of the conveyor platforms. In addition, the air inlet pipe 402 can be connected to an external air cooler as needed.

[0044] After the above preparations are completed, street lamp cover molds can be placed on both conveying platforms. After quantitatively filling one of the street lamp cover molds and sealing its inlet, the staff can push the street lamp cover mold to the center position inside the rotating drum 203. Since the first universal ball 305 is closer to the axis of the rotating drum 203 than the pad 306 under the action of the compression spring 304, the first universal ball 305 will replace the clamping frame 302 to contact the street lamp cover mold when it is pushed, making it easier to push. After the street lamp cover mold is moved into place, the electric push rod 310 can be run to drive the translation ring 307 to move on the rotating drum 203 through the translation frame 309 and the second universal ball 311. At the same time, the wedge block 308 can push each clamping frame 302 until the pads 306 on each clamping frame 302 are in close contact with the outer contour of the street lamp cover mold, thus completing the positioning of the street lamp cover mold.

[0045] Afterwards, the hydraulic cylinder 103 can operate intermittently while the drive unit 206 operates continuously, allowing the rotating drum 203 to both oscillate intermittently relative to the base 101 with the swing table 102 and rotate continuously. During this process, the heating tube 405 heats the mold inside the rotating drum 203, allowing the raw material inside the mold to melt, flow, and adhere to the inner wall of the mold as the rotating drum 203 performs compound movements. After heating for the required duration, the hydraulic cylinder 103 and the heating tube 405 can stop operating, and an external cold air fan can supply air to the air inlet pipe 402 to cool the mold, so that the raw material inside the mold can be cooled and shaped to form a seamless, weather-resistant street lamp cover product. Afterwards, the drive unit 206 can stop operating and the electric push rod 310 can reset the translation ring 307, and the mold can be pushed or pulled to the original conveying platform for product removal. Simultaneously, a mold filled with raw material on another conveying platform can be pushed into the rotating drum 203, and the above production steps can be repeated for subsequent street lamp cover processing.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A rotational moulding machine for producing a street light cover, characterised in that: The system includes a loading assembly (1) on which the core components of the rotational molding machine can be installed. The loading assembly (1) is provided with a receiving assembly (2) that can drive the street lamp cover mold to perform compound movements. The receiving assembly (2) is provided with a positioning assembly (3) that can fix the street lamp cover mold. The loading assembly (1) is also provided with a temperature control assembly (4) that can adjust the temperature of the street lamp cover mold. The loading assembly (1) includes a base (101) on which a table (102) is movably mounted. The receiving component (2) includes a rotating cylinder (203) movably mounted above the table (102); The positioning component (3) includes a clamping member that allows the lamp cover mold to move conveniently within the rotating cylinder (203) along its length direction, a pushing member that can clamp the lamp cover mold with the clamping member after translation, and an adjusting member that can adjust the position of the pushing member as needed; The clamping component includes multiple telescopic rods (301) fixedly connected to the inner side of the rotating drum (203). A clamping frame (302) is fixedly connected between the telescopic ends of the telescopic rods (301) with the same height and longitudinal position. Multiple insert rods (303) are movably connected to the clamping frame (302). A compression spring (304) is movably connected to the outer side of the insert rod (303). A first universal ball (305) is fixedly connected to one end of the insert rod (303). A pad (306) is fixedly installed on the side of the clamping frame (302) away from the telescopic rods (301).

2. The rotational molding machine for producing street lamp covers according to claim 1, characterized in that: The pusher includes two translation rings (307) movably connected to the outer surface of the rotating drum (203), and wedges (308) are provided between the clamping frame (302) and the plurality of translation rings (307).

3. A rotational moulding machine for producing a street light cover according to claim 2, characterized in that: The adjusting component includes a translation frame (309) disposed above the translation ring (307), an electric push rod (310) fixedly connected to one side of the translation frame (309), and multiple second universal balls (311) fixedly connected to the translation frame (309) on both sides of the translation ring (307).

4. A rotational molding machine for producing a street light cover according to claim 1, characterized in that: The base (101) is rotatably connected to the swing table (102).

5. A rotational moulding machine for producing a street light cover according to claim 1, characterized in that: Multiple clamping frames (302) are arranged at equal angular intervals around the axis of the rotating cylinder (203).

6. A rotational moulding machine for producing a street light cover according to claim 2, characterized in that: The clamping frame (302) and the compression spring (304) are slidably connected to the insertion rod (303), and the translation ring (307) and the wedge block (308) are slidably connected to the rotating cylinder (203).

7. A rotational moulding machine for producing a street light cover according to claim 6, characterized in that: Both ends of the clamping frame (302) are integrally formed with inclined portions that match the wedge block (308).

8. A rotational moulding machine for producing a street light cover according to claim 3, characterized in that: Both sides of the translation ring (307) are integrally formed with grooves that match the rolling part of the second universal ball (311).

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