Plastic part pick-and-place device for a plastic machine

Abstract

The utility model discloses a plastic part taking and placing device of plastic machine, more particularly in the taking material mechanical hand technical field of injection molding machine, including injection molding machine and conveying mechanism, still including taking and placing mechanism and arrangement mechanism, taking and placing mechanism set up in the top of injection molding machine, is used for taking the plastic sheet product of injection molding machine injection molding and places product on conveying mechanism to realize automatic taking and placing, reduces manual intervention, arrangement mechanism sets up on conveying mechanism, is used for arranging the plastic sheet product of stacking. The plastic part taking and placing device of plastic machine, through setting up the adsorption subassembly with adjusting horizontal groove, sliding ring and locking screw ring, the interval of pneumatic sucking disc can be adjusted flexibly according to the actual size of plastic sheet product and can be locked reliably, need not to replace complete sucking disc to be suitable for the taking and placing demand of multiple specifications products, improve the versatility of device, reduce the equipment adjustment time and use cost.

Description

Technical Field

[0001] This utility model relates to the technical field of material handling robots for injection molding machines, and in particular to a plastic parts handling device for a plastics machine. Background Technology

[0002] In injection molding, especially for the production of sheet plastic products (such as Lego bricks), after injection molding, the plastic sheets need to be removed from the mold, transferred, and stacked in predetermined quantities for subsequent packaging or assembly. Currently, these operations are typically performed manually or using simple robotic arms. The existing technology has the following problems:

[0003] In existing plastic parts handling devices for plastic machines, the suction cups of the adsorption components are usually fixed in position, making it difficult to quickly adjust them according to different sizes or shapes of plastic sheet products. This results in poor applicability of the device to different specifications of products. When changing products, it is often necessary to replace the entire set of suction cups or make complex modifications, which increases the equipment adjustment time and operating costs.

[0004] Secondly, during the stacking of plastic sheet products, the products placed in sequence are prone to uneven edges and skewed stacking, which often require manual regular straightening or the use of additional equipment for alignment. Utility Model Content

[0005] The main purpose of this utility model is to provide a plastic parts picking and placing device for a plastic machine, which can effectively solve the problem that the suction cup position of the existing adsorption component is fixed, making it difficult to quickly adjust according to plastic sheet products of different sizes or shapes, resulting in poor device applicability and high adjustment costs when changing products.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A plastic parts handling device for a plastic injection molding machine includes an injection molding machine and a conveying mechanism, as well as a handling mechanism and a sorting mechanism. The handling mechanism is located above the injection molding machine and is used to pick up plastic sheet products that have been injection molded by the injection molding machine and place the products on the conveying mechanism, thereby realizing automatic handling and reducing manual intervention. The sorting mechanism is located on the conveying mechanism and is used to sort the stacked plastic sheet products to make the stacking neat and facilitate subsequent packaging.

[0008] Preferably, the pick-and-place mechanism includes a three-axis drive assembly, a flipping assembly, and an adsorption assembly. The moving end of the three-axis drive assembly is connected to the flipping assembly, and the bottom end of the flipping assembly is connected to the adsorption assembly. This structure enables multi-directional movement, multi-angle flipping, and stable adsorption, with flexible and reliable operation.

[0009] Preferably, the flipping assembly includes a suspension bracket, a lifting cylinder, an L-shaped right-angle plate, and a rotating shaft. The suspension bracket is fixedly installed at the moving end of the three-axis drive assembly. The lifting cylinder is fixedly installed on the outer wall of the suspension bracket and parallel to it. The L-shaped right-angle plate is located below the suspension bracket, and both its vertical and horizontal sections are rotatably mounted with rotating shafts. The rotating shaft on the surface of the horizontal section is fixedly connected to the output end of the lifting cylinder, and the rotating shaft on the vertical section is rotatably connected to the bottom end of the lifting cylinder. By driving the L-shaped right-angle plate to flip through the lifting cylinder, the adsorption assembly can be flipped 90 degrees, allowing the product to be moved from vertical removal to horizontal placement smoothly.

[0010] Preferably, the adsorption assembly includes a substrate, a sliding ring, a limiting plate, a threaded ring, an air tube, a pneumatic suction cup, and a locking threaded ring. The substrate is fixedly installed on the vertical section of an L-shaped right-angle plate. The substrate has several through-type adjustment slots. The sliding ring is slidably installed inside the adjustment slots. The limiting plate is fixedly installed on one side of the sliding ring. The threaded ring is fixedly connected to the other side of the sliding ring and communicates with it. The air tube passes through the inner rings of the threaded ring and the sliding ring. The pneumatic suction cup is fixedly connected to one end of the air tube and passes through the limiting plate. The locking threaded ring is threaded onto the outer wall of the threaded ring and abuts against the outer wall of the substrate. By moving the sliding ring within the adjustment slots, the spacing of the pneumatic suction cup can be flexibly adjusted to accommodate products of different sizes. The locking threaded ring firmly fixes the position of the sliding ring, ensuring adsorption stability.

[0011] Preferably, an L-shaped bracket is fixedly installed on the top of the conveying mechanism, and the sorting mechanism includes a cylinder and an L-shaped limiting plate. The cylinder is fixedly installed on the top of the L-shaped bracket, and the L-shaped limiting plate is fixedly connected to the output end of the cylinder. The cylinder can drive the L-shaped limiting plate to rise and fall, which facilitates clearing the conveying channel after sorting and avoids interference with material discharge.

[0012] Preferably, the sorting mechanism further includes two pushing cylinders and two pushing plates. The two pushing cylinders are respectively installed on two mutually perpendicular surfaces of the L-shaped bracket. Each pushing cylinder has a pushing plate fixedly installed at its output end. The two pushing plates are parallel and aligned with two mutually perpendicular surfaces of the L-shaped limiting plate. A limiting slide rod is fixedly installed on the side of each pushing plate away from the L-shaped limiting plate, and the limiting slide rod is slidably connected to the L-shaped bracket. By pushing the products vertically with the two pushing plates, the stacking edges are made neat, while the limiting slide rod ensures that the pushing plates move smoothly.

[0013] Preferably, both the L-shaped limiting plate and one of the parallel push plates have embedding holes on their opposite surfaces. An infrared receiver is installed in the embedding hole of the L-shaped limiting plate, and an infrared transmitter is installed in the embedding hole of the push plate. The infrared transmitter and the infrared receiver are aligned. When the products are stacked to the point of blocking infrared light, subsequent actions can be triggered to achieve automatic detection of the stacking height without manual monitoring.

[0014] Preferably, the system also includes a PLC control system, which is electrically connected to the three-axis drive assembly, lifting cylinder, pneumatic suction cup, conveying mechanism, cylinder, pushing cylinder, infrared transmitter, and infrared receiver. Through centralized PLC control, the sequence and stroke of each actuator can be precisely coordinated, achieving fully automated picking, stacking, and unloading, thus improving production efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model provides a plastic parts picking and placing device for a plastic machine. By setting an adsorption assembly with an adjusting horizontal groove, a sliding ring and a locking threaded ring, the spacing of the pneumatic suction cups can be flexibly adjusted and reliably locked according to the actual size of the plastic sheet products. It can adapt to the picking and placing needs of various specifications of products without replacing the entire set of suction cups, thereby improving the versatility of the device and reducing equipment adjustment time and operating costs.

[0017] 2. This utility model provides a plastic parts picking and placing device for a plastic machine. By setting up a sorting mechanism, the L-shaped limit plate is raised and lowered by a cylinder, and two push cylinders push the push plate to align the products from mutually perpendicular directions. Combined with an infrared transmitter and receiver to automatically detect the stacking height, the stacked products are automatically sorted and unloaded, ensuring that the stacked edges are neat and consistent, which is convenient for subsequent packaging processes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of this utility model.

[0024] In the diagram: 1. Injection molding machine; 2. Picking and placing mechanism; 21. Three-axis drive assembly; 22. Tilting assembly; 221. Suspension bracket; 222. Lifting cylinder; 223. L-shaped right-angle plate; 224. Rotating shaft; 23. Adsorption assembly; 231. Base plate; 232. Adjusting transverse groove; 233. Sliding ring; 234. Limiting plate; 235. Threaded ring; 236. Air pipe; 237. Pneumatic suction cup; 238. Locking threaded ring; 3. Conveying mechanism; 31. L-shaped bracket; 4. Sorting mechanism; 41. Cylinder; 42. L-shaped limiting plate; 421. Embedding hole; 422. Infrared receiver; 43. Pushing cylinder; 44. Pushing plate; 441. Infrared transmitter; 45. Limiting slide bar. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figures 1 to 6 As shown, a plastic part handling device for a plastic injection molding machine includes an injection molding machine 1, a handling mechanism 2, a conveying mechanism 3, and a sorting mechanism 4. The handling mechanism 2 is located above the injection molding machine 1 and is used to pick up the plastic sheet products injection molded by the injection molding machine 1 and place the products on the conveying mechanism 3. The sorting mechanism 4 is located on the conveying mechanism 3 and is used to sort the stacked plastic sheet products.

[0027] like Figure 1 , Figure 2 As shown, the pick-and-place mechanism 2 includes a three-axis drive assembly 21, a flipping assembly 22, and an adsorption assembly 23. The moving end of the three-axis drive assembly 21 is connected to the flipping assembly 22, and the bottom end of the flipping assembly 22 is connected to the adsorption assembly 23. The three-axis drive assembly 21 adopts a three-axis drive mechanism in the prior art, which can realize linear movement in the three directions of X-axis, Y-axis, and Z-axis.

[0028] like Figure 2 , Figure 3 As shown, the flipping assembly 22 includes a suspension bracket 221, a lifting cylinder 222, an L-shaped right-angle plate 223, and a rotating shaft 224. The suspension bracket 221 is fixedly installed at the moving end of the three-axis drive assembly 21. The lifting cylinder 222 is fixedly installed on the outer wall of the suspension bracket 221 and is arranged parallel to the suspension bracket 221. The L-shaped right-angle plate 223 is located below the suspension bracket 221. The rotating shaft 224 is rotatably mounted on both the vertical and horizontal sections of the L-shaped right-angle plate 223. The rotating shaft 224 located on the surface of the horizontal section is fixedly connected to the output end of the lifting cylinder 222; the rotating shaft 224 located on the vertical section is rotatably connected to the bottom end of the lifting cylinder 222. When the piston rod of the lifting cylinder 222 extends or retracts, it can drive the L-shaped right-angle plate 223 to flip around the rotating shaft 224, realizing a 90° flipping action of the adsorption assembly 23.

[0029] like Figure 3 , Figure 4 As shown, the adsorption assembly 23 includes a base plate 231, a sliding ring 233, a limiting plate 234, a threaded ring 235, an air tube 236, a pneumatic suction cup 237, and a locking threaded ring 238. The base plate 231 is fixedly mounted on the vertical section of the L-shaped right-angle plate 223. Several through-type adjustment slots 232 are formed on the base plate 231. The sliding ring 233 is slidably mounted inside the adjustment slots 232. The limiting plate 234 is fixedly mounted on one side of the sliding ring 233. The threaded ring 235 is fixedly connected to the other side of the sliding ring 233, and the threaded ring 235 communicates with the interior of the sliding ring 233. The air tube 236 passes through the inner rings of the threaded ring 235 and the sliding ring 233. The pneumatic suction cup 237 is fixedly connected to one end of the air tube 236, and the pneumatic suction cup 237 extends through the limiting plate 234 to the outside of the limiting plate 234. A locking threaded ring 238 is threaded onto the outer wall of the threaded ring 235 and abuts against the outer wall of the base plate 231. By tightening the locking threaded ring 238, the sliding ring 233 can be fixed at any position in the adjusting groove 232. The end of the air pipe 236 away from the pneumatic suction cup 237 is connected to an external air pump to provide negative pressure.

[0030] Specifically, the internal thread of the locking threaded ring 238 engages with the external thread of the threaded ring 235. When the locking threaded ring 238 is tightened, its end face generates friction with the outer wall of the base plate 231, thereby pressing and fixing the sliding ring 233 at any position within the adjusting transverse groove 232. To prevent loosening due to long-term vibration, an elastic washer can be added between the locking threaded ring 238 and the base plate 231. A scale is engraved on the surface of the base plate 231 along the edge of the adjusting transverse groove 232 for easy adjustment. While this solution does require individual operation during initial adjustment, its advantages, such as compatibility with multiple specifications, no need to replace hardware, and adaptability to irregularly shaped products, far outweigh the time cost of a one-time adjustment. For scenarios with frequent product changes, the adjustment efficiency can be greatly improved with the addition of scale markings. In summary, this design achieves a reasonable balance between practicality, convenience, and compatibility.

[0031] like Figure 1 , Figure 5 As shown, an L-shaped bracket 31 is fixedly installed on the top of the conveying mechanism 3. The sorting mechanism 4 includes a cylinder 41 and an L-shaped limiting plate 42. The cylinder 41 is fixedly installed on the top of the L-shaped bracket 31. The L-shaped limiting plate 42 is fixedly connected to the output end of the cylinder 41. The cylinder 41 can drive the L-shaped limiting plate 42 to move up and down in the vertical direction.

[0032] like Figure 5 , Figure 6As shown, the sorting mechanism 4 also includes two push cylinders 43 and two push plates 44. The two push cylinders 43 are respectively mounted on two mutually perpendicular surfaces of the L-shaped bracket 31. Each push cylinder 43 has a push plate 44 fixedly mounted at its output end. The two push plates 44 are respectively parallel and aligned with two mutually perpendicular surfaces of the L-shaped limiting plate 42. Each push plate 44 has a limiting slide rod 45 fixedly mounted on the side away from the L-shaped limiting plate 42. The limiting slide rod 45 is slidably connected to the L-shaped bracket 31 and is used to guide the linear movement of the push plate 44.

[0033] like Figure 5 As shown, both the L-shaped limiting plate 42 and one of the parallel push plates 44 have embedding holes 421 on their opposite surfaces. An infrared receiver 422 is installed in the embedding hole 421 of the L-shaped limiting plate 42; an infrared transmitter 441 is installed in the embedding hole 421 of the push plate 44. The infrared transmitter 441 and the infrared receiver 422 are aligned in the horizontal direction.

[0034] Specifically, the infrared transmitter 441 continuously emits infrared rays, and the infrared receiver 422 receives the infrared rays. During the stacking process, as the plastic sheet products are stacked one by one, when the stacking height reaches the preset value, that is, when the top product blocks the infrared light path, the infrared receiver 422 cannot receive the signal. After the PLC control system detects this signal change, it immediately executes the following control logic: suspend the picking and placing action of the picking and placing mechanism 2, and stop placing products onto the conveying mechanism 3; sequentially start the two pushing cylinders 43, driving the pushing plate 44 to move towards the L-shaped limit plate 42, pushing and aligning the stacked products from two mutually perpendicular directions. The stroke of the pushing cylinder 43 is preset by the PLC according to the product size. After pushing to the position, it is held for 0.5 to 1 second and then retracted; after the alignment is completed, the cylinder 41 is started to drive the L-shaped limit plate 42 to rise, so that it leaves the stacked products; the conveying mechanism 3 is started to transport the aligned stacked products to the next station; the conveying mechanism 3 runs for a set period of time and then stops. At the same time, the cylinder 41 drives the L-shaped limit plate 42 to descend and reset. The PLC control system resumes the picking and placing action of the picking and placing mechanism 2 and starts the next round of stacking.

[0035] The plastic parts handling device of the plastic machine also includes a PLC control system. The PLC control system is electrically connected to the three-axis drive assembly 21, the lifting cylinder 222, the pneumatic suction cup 237, the conveying mechanism 3, the cylinder 41, the pushing cylinder 43, the infrared transmitter 441, and the infrared receiver 422.

[0036] The working principle of the plastic parts picking and placing device of this plastic machine will be explained in detail below.

[0037] like Figure 1-6As shown, after the injection molding machine 1 completes the injection molding of the plastic sheet product, the PLC control system controls the three-axis drive assembly 21 to move the suction assembly 23 to the mold position of the injection molding machine 1. At this time, the L-shaped right-angle plate 223 is in a vertical state, the base plate 231 and the pneumatic suction cup 237 are vertically oriented, the air pump is started, and the pneumatic suction cup 237 suctions the plastic sheet product. Subsequently, the three-axis drive assembly 21 moves the suction assembly 23 out of the mold area, the lifting cylinder 222 is started, and its output end retracts upward, driving the rotating shaft 224 to... The L-shaped right-angle plate 223 rotates around the pivot 224 of the vertical section, changing its position from vertical to horizontal. This causes the adsorption component 23 to rotate 90 degrees, turning the plastic sheet product horizontally upwards. The three-axis drive component 21 continues to move, transporting the plastic sheet product above the conveying mechanism 3 and placing it on the conveying surface of the conveying mechanism 3 within the area enclosed by the L-shaped limiting plate 42 and the two push plates 44. The pneumatic suction cup 237 releases negative pressure, and the product falls onto the conveying surface. The above pick-and-place action is repeated. Multiple plastic sheet products are stacked on the conveyor mechanism 3. When the stack reaches a certain height, the PLC control system sequentially activates two push cylinders 43. The push cylinders 43 push the push plate 44 towards the L-shaped limit plate 42, aligning the stacked plastic sheet products from two mutually perpendicular directions to ensure that the edges of each product are aligned. The limit slide bar 45 slides in the L-shaped bracket 31 to ensure that the push plate 44 moves smoothly. The stroke of the push cylinder 43 is preset by the PLC control system according to the size of the plastic sheet products to avoid excessive compression. During the stacking process, the infrared transmitter 441 continuously emits infrared rays, and the infrared receiver 422 continuously receives them. When the stacking height increases to the point of blocking the infrared rays, the infrared receiver 422 cannot receive the signal. This signal change is transmitted to the PLC control system, which then controls the cylinder 41 to start. The cylinder 41 drives the L-shaped limit plate 42 to rise, causing the L-shaped limit plate 42 to leave the stacked products. Then, the PLC control system activates the conveyor mechanism 3 to transport the aligned stacked products to the next workstation.

[0038] The conveying mechanism 3 is preferably a belt conveyor driven by a servo motor. The upper surface of its conveying surface maintains a gap of 0.5 to 1 mm with the lower surface of the L-shaped limiting plate 42 and the push plate 44. The three-axis drive assembly 21 uses a servo motor in conjunction with a ball screw or a synchronous belt linear module to achieve precise positioning in the X-axis, Y-axis and Z-axis directions respectively. The stroke and speed of each axis are preset by the PLC control system according to the mold exit position of the injection molding machine 1 and the material receiving position of the conveying mechanism 3.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plastics part handling device for a plastics machine, comprising an injection molding machine (1) and a transport mechanism (3), characterized in that: It also includes a pick-and-place mechanism (2) and a sorting mechanism (4). The pick-and-place mechanism (2) is located above the injection molding machine (1) and is used to pick up the plastic sheet products that have been injection molded by the injection molding machine (1) and place the products on the conveying mechanism (3). The sorting mechanism (4) is located on the conveying mechanism (3) and is used to sort the stacked plastic sheet products. An L-shaped bracket (31) is fixedly installed on the top of the conveying mechanism (3). The sorting mechanism (4) includes a cylinder (41) and an L-shaped limiting plate (42). The cylinder (41) is fixedly installed on the top of the L-shaped bracket (31), and the L-shaped limiting plate (42) is fixedly installed on the top of the L-shaped bracket (31). The sorting mechanism (4) is fixedly connected to the output end of the cylinder (41). It also includes two push cylinders (43) and two push plates (44). The two push cylinders (43) are respectively installed on two mutually perpendicular surfaces of the L-shaped bracket (31). Each push cylinder (43) has a push plate (44) fixedly installed at its output end. The two push plates (44) are respectively parallel and aligned with the two mutually perpendicular surfaces of the L-shaped limiting plate (42). Each push plate (44) has a limiting slide rod (45) fixedly installed on the side away from the L-shaped limiting plate (42). The limiting slide rod (45) is slidably connected to the L-shaped bracket (31).

2. The plastic parts handling device for a plastic machine according to claim 1, characterized in that: The pick-and-place mechanism (2) includes a three-axis drive assembly (21), a flipping assembly (22) and an adsorption assembly (23). The moving end of the three-axis drive assembly (21) is connected to the flipping assembly (22), and the bottom end of the flipping assembly (22) is connected to the adsorption assembly (23).

3. The plastic parts handling device for a plastic machine according to claim 2, characterized in that: The flipping assembly (22) includes a suspension bracket (221), a lifting cylinder (222), an L-shaped right angle plate (223), and a rotating shaft (224). The suspension bracket (221) is fixedly installed at the moving end of the three-axis drive assembly (21). The lifting cylinder (222) is fixedly installed on the outer wall of the suspension bracket (221) and is parallel to the suspension bracket (221). The L-shaped right angle plate (223) is located below the suspension bracket (221). The vertical and horizontal sections of the L-shaped right angle plate (223) are rotatably mounted with rotating shafts (224). The rotating shaft (224) on the surface of the horizontal section is fixedly connected to the output end of the lifting cylinder (222), and the rotating shaft (224) on the vertical section is rotatably connected to the bottom end of the lifting cylinder (222).

4. The plastic parts handling device for a plastic machine according to claim 2, characterized in that: The adsorption assembly (23) includes a base plate (231), a sliding ring (233), a limiting plate (234), a threaded ring (235), an air tube (236), a pneumatic suction cup (237), and a locking threaded ring (238). The base plate (231) is fixedly installed on the vertical section of the L-shaped right-angle plate (223). The base plate (231) has several through-type adjustment slots (232). The sliding ring (233) is slidably installed inside the adjustment slots (232). The limiting plate (234) is fixedly installed on the sliding ring (233). On one side, the threaded ring (235) is fixedly connected to the other side of the sliding ring (233), and the threaded ring (235) and the sliding ring (233) are connected. The air tube (236) is installed through the inner ring of the threaded ring (235) and the sliding ring (233). The pneumatic suction cup (237) is fixedly connected to one end of the air tube (236), and the pneumatic suction cup (237) is installed through the limiting plate (234). The locking threaded ring (238) is threadedly installed on the outer wall of the threaded ring (235), and the locking threaded ring (238) abuts against the outer wall of the base plate (231).

5. The plastic parts handling device for a plastic machine according to claim 1, characterized in that: The L-shaped limiting plate (42) and one of the push plates (44) parallel to it are provided with an embedding hole (421) on their opposite sides. An infrared receiver (422) is installed in the embedding hole (421) of the L-shaped limiting plate (42), and an infrared transmitter (441) is installed in the embedding hole (421) of the push plate (44). The infrared transmitter (441) is aligned with the infrared receiver (422).

6. The plastic parts handling device for a plastic machine according to claim 1, characterized in that: It also includes a PLC control system, which is electrically connected to the three-axis drive assembly (21), the lifting cylinder (222), the pneumatic suction cup (237), the conveying mechanism (3), the cylinder (41), the pushing cylinder (43), the infrared transmitter (441), and the infrared receiver (422).

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