A trimming and shearing device for plastic pallet processing

Abstract

This invention discloses a trimming and shearing device for processing plastic pallets, belonging to the field of pallet processing technology. It includes a conveyor belt, with a mounting frame fixedly connected above the conveyor belt. A shearing module is mounted on the mounting frame and can move perpendicular to the conveyor belt's transport direction to shear the sprue nozzles of pallets placed on the conveyor belt. It also includes a blocking module fixedly mounted on the mounting frame, with multiple blocking elements movably arranged on the blocking module. These blocking elements are arranged sequentially along the conveyor belt's transport direction and can switch between blocking and releasing states. As the conveyor belt moves the pallet forward, the multiple blocking elements sequentially block the pallet at different preset shearing positions. This trimming and shearing device for processing plastic pallets uses multiple blocking elements to sequentially block and position the pallet, allowing sprue nozzles at different locations on the pallet to move sequentially to the shearing station, facilitating continuous trimming and shearing.

Description

Technical Field

[0001] This invention belongs to the field of pallet processing technology, and particularly relates to a trimming and shearing device for processing plastic pallets. Background Technology

[0002] After injection molding, plastic pallets typically have sprue marks at the edges or other locations that need to be removed. To ensure the quality of the plastic pallets during subsequent use, these sprue marks usually need to be trimmed after molding.

[0003] In existing plastic pallet trimming equipment, a common method involves transporting the pallet to the processing position and then using a shearing mechanism to move it to different locations to cut off the multiple sprue marks on the pallet one by one. While this method can complete the trimming, in actual use, the shearing mechanism often needs to be adjusted in multiple directions to accommodate the different sprue mark distributions on the pallet. This makes the shearing mechanism itself relatively complex, and the control process requires coordination in multiple directions, making equipment adjustment and use relatively inconvenient.

[0004] Furthermore, the positioning method of the pallet during the conveying process also affects the subsequent shearing effect. If the pallet only stays in a single position after conveying, or if the stopping position is not stable enough, the sprue nozzles at different positions on the pallet will have difficulty moving accurately to the shearing station in sequence, thus affecting the stability of the continuous shearing process. Summary of the Invention

[0005] To address the aforementioned shortcomings, the present invention aims to provide a trimming and shearing device for processing plastic pallets, which can achieve step-by-step positioning during pallet transport and, in conjunction with a shearing module, sequentially shear the sprue nozzles at different locations on the pallet.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A trimming and shearing device for processing plastic pallets includes a conveyor belt, a mounting frame fixedly connected above the conveyor belt, and a shearing module mounted on the mounting frame. The shearing module is capable of moving in a direction perpendicular to the conveying direction of the conveyor belt to shear the sprue of the pallet placed on the conveyor belt. It also includes a blocking module fixedly installed on the mounting frame. The blocking module is movably provided with multiple blocking components, which are arranged sequentially along the conveying direction of the conveyor belt. The blocking components can switch between blocking and releasing states. When the conveyor belt drives the pallet forward, the multiple blocking components can sequentially block the pallet at different preset shearing positions, so that the sprues at different positions on the pallet are sequentially moved to the shearing station of the shearing module.

[0007] Preferably, the blocking modules are configured as one or two groups; When the blocking modules are in a set, they are positioned above the conveyor belt; When there are two sets of blocking modules, the two blocking modules are respectively set on both sides of the conveyor belt.

[0008] Preferably, the blocking module includes a fixed tube with multiple notches spaced apart on its side wall, and the blocking component is rotatably installed in the notches; a driving rod is provided inside the fixed tube, and the driving rod is connected to the blocking component through transmission. When the driving rod moves along the axis of the fixed tube, it drives the blocking component to rotate, so that the blocking component switches between a blocking state and a releasing state.

[0009] Preferably, the blocking component includes a fixing ring and a baffle plate. The fixing ring is rotatably installed in the notch, and the baffle plate is disposed outside the fixing tube and passes through the notch to be fixedly connected to the fixing ring. The fixing ring is sleeved on the outside of the drive rod, and the drive rod and the fixing ring are connected by a sliding groove structure.

[0010] Preferably, the slide structure includes a protrusion fixedly connected to the inner wall of the fixed ring, and a limiting groove is formed on the side wall of the drive rod. The protrusion slides in the limiting groove. When the drive rod moves, it drives the protrusion to move through the limiting groove, so as to rotate the fixed ring.

[0011] Preferably, the limiting groove includes a first sliding groove, a second sliding groove, and a third sliding groove, wherein the first sliding groove and the third sliding groove are both arranged along the length direction of the drive rod, and the second sliding groove connects the first sliding groove and the third sliding groove; When the protrusion is located in the first groove, the fixing ring is in the first position so that the blocking member is in the blocking state; when the protrusion is located in the third groove, the fixing ring is in the second position so that the blocking member is in the releasing state.

[0012] Preferably, the drive rod is initially separated from each fixed ring, and each of the blocking members is in a blocking state under the action of gravity; when the drive rod moves, each of the protrusions enters the first slide groove and then enters the third slide groove along the second slide groove.

[0013] Preferably, the drive rod is in contact with each fixed ring in the initial state, each of the protrusions is located in the first slide groove, and each of the blocking members is in a blocking state under the restriction of the first slide groove; when the drive rod moves, the protrusion on the front blocking member enters the third slide groove along the second slide groove, and the protrusions on the remaining blocking members remain in the first slide groove.

[0014] Preferably, a limiting disk is fixedly connected to the end of the drive rod, and a limiting strip is fixedly connected to the inner wall of the fixed tube along its length. The limiting disk is provided with a limiting port, and the limiting strip cooperates with the limiting port to restrict the rotation of the limiting disk and restrict the rotation of the drive rod around its axis.

[0015] Preferably, at least one of the blocking members has a mounting base fixedly installed on its side wall, and a trimming head is fixedly installed on the mounting base; when the blocking member is in the release state, the mounting base moves with the blocking member to the corresponding position on the edge of the tray, so that the trimming head can contact the edge of the tray and trim it.

[0016] In summary, the technical effects and advantages of this invention are as follows: This trimming and shearing equipment for processing plastic pallets moves the pallet via a conveyor belt, and uses multiple blocking components arranged sequentially along the conveying direction to position the pallet in stages. This allows the sprue nozzles at different locations on the pallet to move sequentially to the shearing station of the shearing module, enabling the sequential shearing of multiple sprue nozzles on the pallet. Compared to the method of positioning the pallet once and then completing multi-position alignment through a complex shearing mechanism, the pallet positioning process in this solution is more direct, and sprue nozzles at multiple locations can enter the corresponding stations in sequence, facilitating continuous trimming.

[0017] In this invention, the shearing module only needs to move laterally, while the longitudinal position of the pallet is changed by the cooperation of the conveyor belt and the blocking component. Therefore, the shearing module no longer needs to move simultaneously in both the lateral and longitudinal directions. This reduces the degree of freedom of movement of the shearing module, making its structure simpler, and the control process does not need to handle the linkage in two directions simultaneously, making adjustment and use more convenient.

[0018] When the blocking module adopts a rotary structure consisting of a fixed tube, a drive rod, a fixed ring, and a baffle, the drive rod moves along the axial direction, which, through the engagement of the limiting groove and the protrusion, drives multiple blocking components to switch states, thereby achieving centralized driving of multiple blocking components. This eliminates the need for a separate rotary drive structure for each blocking component; multiple blocking components can sequentially complete blocking and releasing, resulting in a more compact overall structure and facilitating the sequential operation of multiple blocking components.

[0019] In this invention, different initial engagement methods can be adopted between the drive rod and the fixed ring. When the drive rod is initially separated from the fixed ring, each blocking component can mainly rely on gravity to maintain its blocking state, which is suitable for engagement with horizontally arranged conveyor belts. When the drive rod is initially in contact with the fixed ring, each blocking component can maintain its blocking state under the constraint of the first chute, which is suitable for engagement with inclined conveyor belts. In this way, the appropriate initial engagement method of the blocking components can be selected according to the different settings of the conveyor belt, making the reset and switching of the blocking components more stable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the blocking module in this invention; Figure 4 This is an exploded view of the blocking module in this invention; Figure 5 This is a schematic diagram of the limiting groove in the present invention; Figure 6 This is a schematic diagram of the internal structure of the blocking module in this invention.

[0021] In the diagram: 1. Conveyor belt; 2. Mounting frame; 3. Shearing module; 4. Blocking module; 31. Fixing tube; 32. Blocking component; 33. Mounting base; 34. Drive rod; 35. Limiting groove; 36. Limiting plate; 311. Notch; 312. Limiting strip; 321. Fixing ring; 322. Protrusion; 323. Baffle; 351. First slide groove; 352. Second slide groove; 353. Third slide groove. Detailed Implementation

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

[0023] The inventors of this invention discovered that in the traditional process of trimming sprues on plastic pallets, a shearing mechanism typically needs to move in multiple directions to trim sprues at different locations on the pallet one by one. This method makes the shearing mechanism itself complex, and the control process requires simultaneous coordination in multiple directions, making adjustment and use inconvenient. Furthermore, unstable pallet positioning during transport can also affect the accuracy of subsequent sprue trimming.

[0024] Based on this discovery, the present invention proposes a novel approach: a conveyor belt drives a pallet to move along the conveying direction, and multiple blocking components sequentially block and position the pallet, causing the sprue nozzles at different positions on the pallet to move sequentially to the shearing station of the shearing module; at the same time, the shearing module only needs to move laterally to complete the shearing of the corresponding sprue nozzles, thereby allowing the longitudinal position change of the pallet to be achieved by the cooperation of the conveyor belt and the blocking components, and making the operation of the shearing module more direct.

[0025] like Figures 1-6As shown, in one embodiment of the present invention, a trimming and shearing device for processing plastic pallets includes a conveyor belt 1, a mounting frame 2 fixedly connected above the conveyor belt 1, a shearing module 3 disposed on the mounting frame 2, the shearing module 3 being movable in a direction perpendicular to the conveying direction of the conveyor belt 1 to shear the sprue of the pallet placed on the conveyor belt 1; it also includes a blocking module 4 fixedly mounted on the mounting frame 2, a plurality of blocking members 32 being movably disposed on the blocking module 4, the plurality of blocking members 32 being arranged sequentially along the conveying direction of the conveyor belt 1, the blocking members 32 being able to switch between a blocking state and a releasing state, when the conveyor belt 1 drives the pallet forward, the plurality of blocking members 32 being able to sequentially block the pallet at different preset shearing positions, so that the sprue at different positions on the pallet is sequentially moved to the shearing position of the shearing module 3.

[0026] The conveyor belt 1 is used to carry and transport the plastic pallets to be trimmed. The conveyor belt 1 can be set horizontally or at an incline, with the input end higher than the output end. Preferably, the incline angle of the conveyor belt 1 is 5°-15°, for example, 8°. When set at an incline, the pallet tends to move towards the output end under the action of gravity during transport. With the blocking member 32 limiting the pallet, the pallet's positioning at the preset shearing position is more stable and less prone to shifting in place, thus facilitating subsequent trimming of the sprue.

[0027] Mounting frame 2 is positioned above conveyor belt 1. Mounting frame 2 can have a U-shaped structure and span across conveyor belt 1. Conveyor belt 1 can be fixed to the ground by a support frame. Mounting frame 2 is fixed to both sides of conveyor belt 1 and is used to install shearing module 3 and blocking module 4.

[0028] The shearing module 3 includes a shearing head and a drive mechanism. The drive mechanism is used to move the shearing head laterally. Specifically, the drive mechanism can adopt a lead screw transmission structure, coupled with a servo motor drive, to make the shearing head reciprocate laterally to shear the tray sprue. After the servo motor drives the lead screw to rotate, the moving parts cooperating with the lead screw move linearly, thereby moving the shearing head to the corresponding position. The lateral movement stroke of the shearing head can be set according to the lateral dimensions of the tray and the lateral distribution of the sprue, as long as it can move the shearing head to the corresponding sprue position.

[0029] Compared to existing shearing methods that employ two-dimensional movement in both the transverse and longitudinal directions, in this design, the shearing module 3 moves only laterally, while the longitudinal position of the pallet is achieved through the coordination of the conveyor belt 1 and multiple blocking components 32. This eliminates the need for a separate movement direction, simplifies the structure of the shearing module 3, and eliminates the need to simultaneously manage the linkage in two directions during control, making it more direct and easier to adjust. It should be noted that longitudinal refers to the conveying direction along the conveyor belt 1; transverse refers to the width direction of the conveyor belt 1.

[0030] The blocking component 32 can be a telescopic structure or a rotating structure.

[0031] In the telescopic structure, the blocking member 32 can extend or retract in the direction close to or away from the pallet conveying path under the action of the driving member; when the blocking member 32 extends into the pallet conveying path, the blocking member 32 is in a blocking state and is used to block the pallet; when the blocking member 32 retracts and exits the pallet conveying path, the blocking member 32 is in a releasing state and the pallet can continue to move forward.

[0032] In the rotary structure, the blocking member 32 is rotatably mounted on the blocking module 4 and rotates around the rotation axis under the action of the driving member; when the blocking member 32 rotates to a position extending into the pallet conveying path, the blocking member 32 is in a blocking state; when the blocking member 32 rotates to a position avoiding the pallet conveying path, the blocking member 32 is in a releasing state. Subsequent embodiments preferably employ a rotary structure.

[0033] In one embodiment, the blocking members 32 can be configured as four groups, arranged sequentially along the conveying direction of the conveyor belt 1. The spacing between two adjacent groups of blocking members 32 can be set according to the longitudinal positional relationship of adjacent sprue outlets on the pallet, for example, it can be set to 150mm-300mm, preferably about 200mm. In this way, when the pallet is blocked by each group of blocking members 32 in sequence, the sprue outlets at different positions on the pallet can be moved sequentially to the shearing station of the shearing module 3. When the blocking member 32 adopts a rotating structure, its rotation angle can be set to 60°-120°, preferably about 90°; when it rotates to a position extending into the pallet conveying path, it is in a blocking state; when it rotates to a position avoiding the pallet conveying path, it is in a releasing state.

[0034] All the blocking components 32 are in the blocking state by default. When the pallet moves forward driven by the conveyor belt 1, it is first blocked by the first set of blocking components 32 and stops at the first preset shearing position, causing the first sprue to move to the shearing station of the shearing module 3. Then, the shearing module 3 drives the shearing head to move laterally to complete the shearing of the first sprue. After the first set of blocking components 32 switches to the release state, the pallet continues to move forward until it is blocked by the second set of blocking components 32, causing the second sprue to move to the shearing station, and then the shearing of the second sprue is completed. Afterwards, the remaining blocking components 32 work in the same way to complete the shearing of the sprues at their corresponding positions.

[0035] After the pallet has completed all shearing, it continues to move forward and leave the shearing area. The blocking components 32, which have been switched to the release state, return to the blocking state to be used for positioning and shearing the next pallet. In this way, multiple blocking components 32 can repeatedly block and release in sequence, while the shearing module 3 moves repeatedly in the lateral direction, thereby continuously completing the sprue trimming of multiple pallets.

[0036] In this embodiment of the invention, the blocking module 4 can be configured as one set or two sets. When the blocking module 4 is configured as one set, it is positioned above the conveyor belt 1, and the blocking member 32 located above can block and position the pallet. When the blocking module 4 is configured as two sets, the two sets of blocking modules 4 are respectively positioned on both sides of the conveyor belt 1, and the blocking members 32 on both sides can cooperate to block and position the pallet. A single set of blocking modules 4 has a simpler structure, while two sets of blocking modules 4 facilitate synchronous positioning of both sides of the pallet, making it suitable for pallets with larger dimensions or higher positioning requirements on both sides.

[0037] In one embodiment, the blocking module 4 includes a fixed tube 31, which is parallel to the conveyor belt 1 and fixedly connected to the mounting frame 2. Multiple notches 311 are spaced apart on the side wall of the fixed tube 31, and multiple blocking elements 32 are rotatably installed in the corresponding notches 311. A drive rod 34 is provided inside the fixed tube 31, extending along the axial direction of the fixed tube 31 and drivingly connected to the multiple blocking elements 32. With this arrangement, when the drive rod 34 moves along the axial direction within the fixed tube 31, it can drive each blocking element 32 to rotate, thereby switching each blocking element 32 between a blocking state and a releasing state. The fixed tube 31 serves both to install and guide the drive rod 34 and facilitates the centralized arrangement of multiple blocking elements 32 on the same mounting base.

[0038] Furthermore, the blocking member 32 includes a retaining ring 321 and a baffle 323. The retaining ring 321 is rotatably mounted within the notch 311, and the baffle 323 is disposed outside the fixing tube 31 and is fixedly connected to the retaining ring 321 through the notch 311. The retaining ring 321 is located at the position of the fixing tube 31 and the drive rod 34, and the baffle 323 is located outside the fixing tube 31 and arranged towards the pallet conveying path. The two are linked together by their connection through the notch 311. When the retaining ring 321 rotates, the baffle 323 rotates synchronously to switch between a position extending into the pallet conveying path and a position avoiding the pallet conveying path.

[0039] The fixed ring 321 is sleeved on the outside of the drive rod 34, and the drive rod 34 and the fixed ring 321 are connected by a sliding groove structure. In this way, the linear movement of the drive rod 34 in the axial direction can be converted into the rotation of the fixed ring 321, which in turn drives the baffle 323 to rotate.

[0040] In one specific embodiment, the chute structure includes a protrusion 322 fixedly connected to the inner wall of the fixed ring 321, and a limiting groove 35 formed on the side wall of the drive rod 34, with the protrusion 322 slidably engaged within the limiting groove 35. When the drive rod 34 moves along the axis of the fixed tube 31, the limiting groove 35 is displaced relative to the protrusion 322, causing the protrusion 322 to move along the limiting groove 35 and drive the fixed ring 321 to rotate. Since the baffle 323 is fixedly connected to the fixed ring 321, the baffle 323 rotates synchronously when the fixed ring 321 rotates, thereby achieving the switching of the state of the blocking member 32. In this structure, the drive rod 34 itself moves linearly, eliminating the need for an independent rotation drive for each baffle 323, allowing multiple blocking members 32 to cooperate in sequence, resulting in a more compact structure.

[0041] Furthermore, referring to Figure 5 The limiting groove 35 includes a first sliding groove 351, a second sliding groove 352, and a third sliding groove 353. The first sliding groove 351 and the third sliding groove 353 are both arranged along the length direction of the drive rod 34, and the second sliding groove 352 connects the first sliding groove 351 and the third sliding groove 353. The first sliding groove 351 and the third sliding groove 353 can respectively correspond to two stable positions of the blocking member 32. The second sliding groove 352 is located between the two and is used to guide the protrusion 322 from the first sliding groove 351 to the third sliding groove 353, or from the third sliding groove 353 back to the first sliding groove 351 during the movement of the drive rod 34.

[0042] When the protrusion 322 is located within the first chute 351, the retaining ring 321 is in the first position, at which point the baffle 323 extends into the pallet conveying path, and the blocking member 32 is in a blocking state. When the protrusion 322 is located within the third chute 353, the retaining ring 321 is in the second position, at which point the baffle 323 rotates to a position that avoids the pallet conveying path, and the blocking member 32 is in a releasing state. When the drive rod 34 continues to move in the opposite direction, the protrusion 322 can return to the first chute 351 along the second chute 352, and the retaining ring 321 and the baffle 323 return to the blocking state.

[0043] In practice, the drive rod 34 and each fixed ring 321 can adopt two initial engagement methods.

[0044] In one configuration, the drive rod 34 is initially separated from each fixed ring 321, and each blocking member 32 naturally remains in a blocking state under gravity. When the drive rod 34 moves along the axial direction, the protrusions 322 on each blocking member 32 enter the first slide groove 351 and continue along the second slide groove 352 into the third slide groove 353, thereby driving the corresponding fixed ring 321 and baffle 323 to rotate, causing the corresponding blocking member 32 to switch to the release state. In this configuration, each blocking member 32 does not need to rely on the drive rod 34 to maintain its blocking position in the initial state, but mainly relies on its own gravity to naturally return to the blocking state. This configuration is more suitable for use with a horizontally set conveyor belt 1, because when the conveyor belt 1 is horizontally set, the fixed tube 31 is also horizontal, and each blocking member 32 is more likely to rotate downwards and return to the blocking position under gravity, making the reset process smoother.

[0045] In another configuration, the drive rod 34 initially contacts each fixed ring 321, with each protrusion 322 located within the first groove 351, and each blocking member 32 in a blocking state under the constraint of the first groove 351. When the drive rod 34 moves along the axial direction, the protrusion 322 on the front blocking member 32 first enters the third groove 353 along the second groove 352, causing the blocking member 32 to switch to the release state first. The protrusions 322 on the remaining blocking members 32 remain within the first groove 351 before entering the second groove 352, and the corresponding blocking members 32 continue to maintain the blocking state. As the drive rod 34 continues to move, the subsequent blocking members 32 then switch to the release state in sequence. In this configuration, each blocking member 32 maintains a cooperative relationship with the drive rod 34 in the initial state, and the blocking state is mainly restricted by the first groove 351. Therefore, even when the conveyor belt 1 is tilted, each blocking member 32 can be stably kept in the blocking position. In other words, when the conveyor belt 1 is tilted and the fixed pipe 31 is tilted accordingly, this method makes it easier to ensure the reset stability and sequential switching stability of each blocking component 32.

[0046] In one embodiment, reference Figure 6 A limiting disk 36 is fixedly connected to the end of the drive rod 34, and a limiting strip 312 is fixedly connected to the inner wall of the fixed tube 31 along its length. The limiting disk 36 is provided with a limiting opening, and the limiting strip 312 cooperates with the limiting opening. With this configuration, the limiting disk 36 can move along the length of the fixed tube 31 with the drive rod 34, while the cooperation between the limiting strip 312 and the limiting opening can restrict the rotation of the limiting disk 36 around its axis, thereby restricting the rotation of the drive rod 34 around its axis.

[0047] In specific configurations, the limiting strips 312 can be configured as one or two sets. When the limiting strips 312 are configured as one set, the structure is relatively simple, but the circumferential restriction on the limiting disc 36 is mainly concentrated on one side, resulting in relatively weak limiting stability during the reciprocating movement of the drive rod 34. To ensure a more stable circumferential position for the drive rod 34 during movement, it is preferable to configure the limiting strips 312 as two sets. Furthermore, the two sets of limiting strips 312 can be asymmetrically configured, with different specifications, so that the limiting disc 36 can only correspond to one assembly and guiding relationship when engaging with the two sets of limiting strips 312. This avoids the problem of unclear engagement positions due to identical structures on both sides and improves the reliability of the position restriction of the drive rod 34.

[0048] Since the drive rod 34 needs to move along the axial direction and drive the fixed ring 321 to rotate through the engagement of the limiting groove 35 and the protrusion 322, if the drive rod 34 rotates during its movement, it can easily affect the relative positional relationship between the limiting groove 35 and the protrusion 322. After setting the above-mentioned limiting structure, the movement of the drive rod 34 in the axial direction is not affected, while its rotation around its own axis is restricted, thereby maintaining a stable engagement between the limiting groove 35 and each protrusion 322, which facilitates the switching between the blocking state and the releasing state of each blocking member 32 in a predetermined manner.

[0049] In the above embodiments, refer to Figure 3 and Figure 4 At least one blocking member 32 has a mounting base 33 fixedly installed on its side wall, and a trimming head is fixedly installed on the mounting base 33. The mounting base 33 can rotate synchronously with the blocking member 32. When the blocking member 32 is in the blocking state, the trimming head is in the avoidance position and does not contact the tray. When the blocking member 32 switches to the release state, the mounting base 33 rotates together with the blocking member 32 to the corresponding position on the edge of the tray. At this time, the trimming head is located at the movement path of the edge of the tray.

[0050] As the pallet continues to move forward, its edge contacts the trimming head, thus trimming the pallet edge. With this configuration, the blocking member 32 can switch between blocking and releasing positions while simultaneously moving the trimming head between an avoidance position and a trimming position, eliminating the need for a separate mechanism to switch the trimming head's position. For pallets requiring edge trimming, a mounting base 33 and a trimming head can be installed on the corresponding blocking member 32, allowing the pallet to complete edge trimming as it passes the appropriate position.

[0051] In some embodiments, the mounting base 33 may be disposed on the front blocking member 32 or on other blocking members 32, depending on the trimming position of the tray edge. After the tray moves to the position of the corresponding blocking member 32 and completes positioning, the blocking member 32 switches to the release state, and the trimming head rotates to the corresponding position on the tray edge. Subsequently, the tray continues to move forward and contacts the trimming head to complete the edge trimming.

[0052] The working principle is as follows: After the pallet is placed on the conveyor belt 1, the conveyor belt 1 drives the pallet to move forward along the conveying direction. Multiple blocking components 32 are initially in a blocking state. The pallet is first blocked by the front blocking component 32 and stops at the corresponding preset shearing position, causing the sprue at the corresponding position on the pallet to move to the shearing station of the shearing module 3. Subsequently, the shearing module 3 drives the shearing head to move laterally to shear the sprue at that position.

[0053] Once the sprue at the corresponding position is cut, the corresponding blocking member 32 switches to the release state. The pallet continues to move forward with the conveyor belt 1 and stops at the next preset cutting position under the action of the next blocking member 32, so that the sprue at the next position moves to the cutting station of the cutting module 3. Then, the cutting module 3 operates again to complete the cutting of the sprue at the next position. Multiple blocking members 32 sequentially block and release in the above manner until the sprues at each position on the pallet are trimmed.

[0054] When the blocking module 4 adopts a rotary structure, the drive rod 34 moves along the axis of the fixed tube 31 and drives the fixed ring 321 to rotate through the cooperation of the limiting groove 35 and the protrusion 322. The fixed ring 321 then drives the baffle 323 to switch between the blocking state and the releasing state. In the embodiment where the drive rod 34 and the fixed ring 321 are initially separated, each blocking member 32 mainly relies on its own gravity to return to the blocking state; in the embodiment where the drive rod 34 and the fixed ring 321 are initially in contact, each blocking member 32 is kept in the blocking state under the restriction of the first sliding groove 351 and switches to the releasing state in sequence during the movement of the drive rod 34.

[0055] After the tray has completed all the sprue shearing, the tray continues to move forward and leave the shearing area. Each blocking member 32 returns to the blocking state to allow for positioning and shearing of the next tray. In the embodiment equipped with a trimming cutter head, when the corresponding blocking member 32 switches to the release state, the trimming cutter head rotates with the blocking member 32 to the corresponding position on the edge of the tray. As the tray continues to move forward, its edge contacts the trimming cutter head, thereby completing the trimming of the tray edge.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A trimming and shearing device for processing plastic pallets, characterized in that, Includes a conveyor belt, with a mounting frame fixedly connected above the conveyor belt. A shearing module is provided on the mounting frame. The shearing module can move in a direction perpendicular to the conveying direction of the conveyor belt to shear the sprue of the tray placed on the conveyor belt. It also includes a blocking module fixedly installed on the mounting frame. The blocking module is movably provided with multiple blocking components, which are arranged sequentially along the conveying direction of the conveyor belt. The blocking components can switch between blocking and releasing states. When the conveyor belt drives the pallet forward, the multiple blocking components can sequentially block the pallet at different preset shearing positions, so that the sprues at different positions on the pallet are sequentially moved to the shearing station of the shearing module.

2. The trimming and shearing equipment for processing plastic pallets according to claim 1, characterized in that, The blocking module is configured as one or two groups; When the blocking modules are in a set, they are positioned above the conveyor belt; When there are two sets of blocking modules, the two blocking modules are respectively set on both sides of the conveyor belt.

3. The trimming and shearing equipment for processing plastic pallets according to claim 1, characterized in that, The blocking module includes a fixed tube with multiple notches spaced apart on its side wall. The blocking component is rotatably installed in the notches. A driving rod is provided inside the fixed tube. The driving rod is connected to the blocking component. When the driving rod moves along the axis of the fixed tube, it drives the blocking component to rotate, so that the blocking component switches between blocking and allowing states.

4. The trimming and shearing equipment for processing plastic pallets according to claim 3, characterized in that, The blocking component includes a fixed ring and a baffle plate. The fixed ring is rotatably installed in the notch, and the baffle plate is disposed outside the fixed tube and passes through the notch to be fixedly connected to the fixed ring. The fixed ring is sleeved on the outside of the drive rod, and the drive rod and the fixed ring are connected by a sliding groove structure.

5. The trimming and shearing equipment for processing plastic pallets according to claim 4, characterized in that, The slide structure includes a protrusion fixedly connected to the inner wall of the fixed ring. A limiting groove is formed on the side wall of the drive rod. The protrusion slides in the limiting groove. When the drive rod moves, it drives the protrusion to move through the limiting groove, thereby causing the fixed ring to rotate.

6. The trimming and shearing equipment for processing plastic pallets according to claim 5, characterized in that, The limiting groove includes a first sliding groove, a second sliding groove, and a third sliding groove. The first sliding groove and the third sliding groove are both arranged along the length direction of the drive rod, and the second sliding groove connects the first sliding groove and the third sliding groove. When the protrusion is located in the first groove, the fixing ring is in the first position so that the blocking member is in the blocking state; when the protrusion is located in the third groove, the fixing ring is in the second position so that the blocking member is in the releasing state.

7. The trimming and shearing equipment for processing plastic pallets according to claim 6, characterized in that, In the initial state, the drive rod remains separated from each fixed ring, and each of the blocking members is in a blocking state under the action of gravity; when the drive rod moves, each of the protrusions enters the first slide groove and then enters the third slide groove along the second slide groove.

8. A trimming and shearing device for processing plastic pallets according to claim 6, characterized in that, In the initial state, the drive rod is in contact with each fixed ring, each protrusion is located in the first slide groove, and each blocking member is in a blocking state under the restriction of the first slide groove. When the drive rod moves, the protrusion on the front blocking member enters the third slide groove along the second slide groove, while the protrusions on the remaining blocking members remain in the first slide groove.

9. A trimming and shearing device for processing plastic pallets according to claim 3, characterized in that, A limiting disk is fixedly connected to the end of the drive rod, and a limiting strip is fixedly connected to the inner wall of the fixed tube along its length. The limiting disk is provided with a limiting port, and the limiting strip cooperates with the limiting port to restrict the rotation of the limiting disk and restrict the drive rod from rotating around its axis.

10. A trimming and shearing device for processing plastic pallets according to any one of claims 1-9, characterized in that, At least one of the blocking members has a mounting base fixedly installed on its side wall, and a trimming head is fixedly installed on the mounting base; when the blocking member is in the release state, the mounting base moves with the blocking member to the corresponding position on the edge of the tray, so that the trimming head can contact the edge of the tray and trim it.

Images