An injection molding apparatus having a waste recovery assembly
Patent Information
- Application Number
- CN202611027760.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-10
- Publication Date
- 2026-10-27
AI Technical Summary
本发明中，成型后在注射器远离或者下模具向下位移实现开模的过程中，水口废料掉落至下模具外围呈回形结构的漏槽内，并通过下方导料板进行集中收集，从而实现注塑成型过程中对水口废料的回收再利用。
Smart Images
Figure CN122975935A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of injection molding technology, and in particular to an injection molding device with a waste recycling component. Background Technology
[0002] Injection molding is the most widely used molding process in the modern plastics processing field. Conventional horizontal injection molding equipment mostly adopts an upper and lower opening mold structure. After each molding cycle, the mold parting surface will generate sprue waste formed by the cooling and solidification of the main runner, branch runner and gate. This type of waste is a process surplus that is bound to be generated in the injection molding process. The amount generated is stable and can be recycled and reused.
[0003] Currently, most general-purpose injection molding equipment does not integrate a waste recycling structure into the machine body. In production, the common practice is to manually pick up the sprue and use an external split shredder for recycling. However, manual collection is slow, and the accumulated waste debris can easily affect the use of injection molds and related equipment. Summary of the Invention
[0004] Based on the technical problems in the background art, the present invention proposes an injection molding equipment with a waste recycling component.
[0005] This invention proposes an injection molding equipment with a waste recycling component, comprising a mounting frame, an upper mold, a lower mold, and an injector. The upper mold is fixed to the top of the mounting frame, and a vertically driven cylinder is connected below the lower mold. The mounting frame has a bottom plate and a top plate, and four columns are fixed between the bottom plate and the top plate. A movable frame connected to the cylinder is fixed to the bottom of the lower mold. A U-shaped groove is formed in the movable frame on the periphery of the lower mold, and a fixing block is fixed to the inner wall of the groove. The outer circumferential cross-section of the groove is larger than the cross-section of the lower mold. An inclined guide plate is provided below the movable frame.
[0006] Preferably, a vertically extending connecting rod is fixed between one end of the cylinder and the movable frame, and a hole is provided on the guide plate to be slidably connected with the connecting rod. The guide plate is inclined downward in one direction and the two sides of the guide plate are bent upward.
[0007] Preferably, the guide plate is fixedly disposed between the guide plate and the mounting frame, and the guide plate is provided with retractable collision components at both ends of the connecting rod.
[0008] Preferably, the collision assembly is provided with two fixed frames that are mounted on the guide plate. A fixed shaft is fixed between the two fixed frames. Two connecting frames are rotatably connected to the outer wall of the fixed shaft by a torsion spring. Both connecting frames are inclined upwards in the direction away from the fixed shaft. A roller-shaped contact block is rotatably connected to the connecting frames at the position away from the fixed shaft.
[0009] Preferably, the bottom of the movable frame has multiple grooves at the position corresponding to the contact block, and the distribution of the multiple grooves is the same as the moving direction of the contact block.
[0010] Preferably, the contact block and the fixing block are positioned correspondingly, and the axial length of the contact block is greater than the width of the fixing block.
[0011] Preferably, it also includes a monitoring and early warning mechanism, which includes an angle detection unit and a cylinder position detection unit; the angle detection unit is a miniature angle sensor, which is fixedly installed on the outer wall of the fixed frame. The detection shaft of the miniature angle sensor is coaxially arranged with the fixed shaft. The end of the detection shaft is locked and fixed to the sleeve part of the connecting frame and synchronously driven, which is used to collect the opening angle of the connecting frame in real time; the cylinder position detection unit is a magnetic switch built into the cylinder, and the signal of the magnetic switch is connected to the PLC control system. The PLC control system has a preset standard reference angle value and an allowable deviation threshold, with the allowable deviation threshold being ±% of the standard reference angle value. The PLC control system couples and compares the magnetic switch position signal and the connecting frame opening angle signal. When the magnetic switch triggers the position signal and the connecting frame opening angle is lower than the small warning threshold, a collision component wear warning is triggered. When the connecting frame opening angle reaches the standard reference angle value and the magnetic switch does not trigger the position signal, an abnormal mold opening stroke warning is triggered.
[0012] Preferably, horizontally extending air blowing elements are provided on both sides of the guide plate, with the air blowing elements located above the guide plate and outside the trough.
[0013] Preferably, elastic ropes are fixed on both sides of the trough, and the elastic ropes extend in the direction between the two ends of the movable frame. Multiple impact beads are fixed on the outer wall of the elastic ropes, and the blowing intensity of the air blowing component changes periodically.
[0014] The beneficial effects of this invention are as follows: In this invention, after molding, during the process of the syringe moving away from the mold or the lower mold moving downward to open the mold, the sprue waste falls into the groove with a U-shaped structure on the periphery of the lower mold and is collected by the guide plate below, thereby realizing the recycling and reuse of sprue waste during the injection molding process.
[0015] In this invention, mechanical vibration is used to assist in the detachment and fall of the sprue waste. As the moving frame descends, it pushes down on the two contact blocks and the connecting frame, causing the two contact blocks to roll outward and the two connecting frames to open. The rolling of the contact blocks on the outer wall of the bottom of the moving frame helps to generate mechanical vibration.
[0016] In this invention, by setting an angle detection unit and a cylinder positioning detection unit, and through the above-mentioned dual-signal coupling monitoring and early warning design, the wear trend of vulnerable parts of the collision component can be predicted in advance, so as to achieve preventive maintenance, avoid problems such as sprue sticking and waste accumulation after the collision vibration function fails, ensure the continuity and stability of the waste recycling process, and reduce the frequency of manual cleaning. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of an injection molding equipment with a waste recycling component proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of the casing of an injection molding equipment with a waste recycling component proposed in this invention. Figure 3 This is a schematic diagram of the auxiliary platform position structure of an injection molding equipment with a waste recycling component proposed in this invention; Figure 4 This is a schematic diagram of the upper structure of the moving frame of an injection molding equipment with a waste recycling component proposed in this invention; Figure 5 This is a schematic diagram of the guide plate position structure of an injection molding equipment with a waste recycling component proposed in this invention; Figure 6 This is a schematic diagram of the fixed frame distribution structure of an injection molding equipment with a waste recycling component proposed in this invention; Figure 7 This is a schematic diagram of the contact block position structure of an injection molding equipment with a waste recycling component proposed in this invention; Figure 8 This is a schematic diagram of the lower structure of the moving frame of an injection molding equipment with a waste recycling component proposed in this invention.
[0018] In the diagram: 1 Upper mold, 2 Lower mold, 3 Cylinder 1, 4 Injector, 5 Cylinder 2, 6 Base plate, 7 Top plate, 8 Column, 9 Shell, 10 Moving frame, 11 Slot, 12 Fixing block, 13 Guide plate, 14 Auxiliary table, 15 Connecting rod, 16 Fixing frame, 17 Fixing shaft, 18 Connecting frame, 19 Contact block, 20 Groove, 21 Air blowing component, 22 Elastic rope, 23 Impact ball, 24 Intermediate plate. Detailed Implementation
[0019] Example 1: Refer to Figures 1-8An injection molding machine with a waste recycling component includes a mounting frame, an upper mold 1, a lower mold 2, and an injector 4. The upper mold 1 is located above the lower mold 2 and the upper mold 1 and lower mold 2 are compatible. The upper mold 1 is fixed to the top of the mounting frame. A vertically driven cylinder 3 is connected to the lower mold 2. The injector 4 is located on the side of the upper mold 1 and is connected to a horizontally driven cylinder 5. Thus, the upper mold 1 in a fixed position and the lower mold 2 connected by cylinder 3 realize mold opening and closing. After mold closing, the injector 4 is pushed by cylinder 5. Injector 4 enters to perform injection molding. The mounting frame has a base plate 6 and a top plate 7, with four columns 8 fixed between the base plate 6 and the top plate 7. A protective housing 9 is installed outside the mounting frame. A movable frame 10 connected to cylinder 3 is fixed to the bottom of the lower mold 2. Sliding holes for sliding connection with the columns 8 are opened at the four corners of the movable frame 10. A loop-shaped groove 11 is opened in the movable frame 10 on the periphery of the lower mold 2. A fixing block 12 is fixed to the inner wall of the groove 11. It should be noted that the movable frame 10, through the loop-shaped groove 11, forms a... The intermediate plate 24 and the outer ring frame are fixed together by multiple fixing blocks 12. The intermediate plate 24, fixing blocks 12 and ring frame are integrally formed, thereby fixing the lower mold 2 on the intermediate plate 24 and ensuring the load stability of the moving frame 10 for bearing the lower mold 2. The outer ring cross-section of the slot 11 is larger than the cross-section of the lower mold 2. An inclined guide plate 13 is provided below the moving frame 10. In use, the lower mold 2 is lifted by the cylinder 3 to realize the mold closing operation of the upper mold 1 and the lower mold 2. The cylinder 25 pushes the syringe 4 close to the mold for injection molding. The above injection molding operation is a conventional method in this field and will not be described in detail. After molding, as the syringe 4 moves away or the lower mold 2 moves downward to open the mold, the sprue waste falls into the drain trough 11 with a U-shaped structure on the periphery of the lower mold 2 and is collected by the guide plate 13 below. This realizes the recycling and reuse of sprue waste during the injection molding process, avoids the tediousness of manual collection, and avoids the accumulation of waste during continuous injection molding that affects the normal use of other equipment.
[0020] In this invention, a vertically extending connecting rod 15 is fixed between the top of cylinder 3 and the moving frame 10. The guide plate 13 has holes that are slidably connected to the connecting rod 15, so that while cylinder 3 moves the lower mold 2, waste material is collected by a single guide plate 13. The top of the connecting rod 15 is fixed to the bottom of the intermediate plate 24 to ensure the load-bearing capacity of the lower mold 2 installed on the intermediate plate 24. The guide plate 13 is inclined downward towards the end away from the syringe 4, and the two sides of the guide plate 13 are bent upward. The bending of the two sides of the guide plate 13 helps to collect the falling waste material.
[0021] In this invention, the guide plate 13 is fixedly installed between itself and the mounting frame. The guide plate 13 has retractable collision components at both ends of the connecting rod 15. The two collision components have the same structure. The guide plate 13 is inclined between its two ends. Therefore, during mold opening, as the moving frame 10 moves downwards, it first contacts and collides with the collision component above the inclined surface of the guide plate 13, and then with the collision component below the inclined surface of the guide plate 13. The mechanical vibration generated by these successive collisions assists in the falling of sprue waste. Additionally, an auxiliary platform 14, fixed to the mounting frame, is located below the guide plate 13. The auxiliary platform 14 is fixed to the four columns 8. The cross-section of the auxiliary platform 14 is larger than the cross-section of the moving frame 10, thus enabling the collection of waste material that accidentally does not fall onto the guide plate 13.
[0022] In this invention, the collision assembly is provided with two fixed frames 16 mounted on the guide plate 13. The fixed frames 16 extend vertically upward, and a horizontally extending fixed shaft 17 is fixed between the two fixed frames 16. The outer circumferential wall of the fixed shaft 17 is rotatably connected to two connecting frames 18 via torsion springs. Both connecting frames 18 are inclined upward in a direction away from the fixed shaft 17. The position of the connecting frame 18 away from the fixed shaft 17 is rotatably connected to a roller-shaped contact block 19 via a bearing. Specifically, the connecting frame 18 is provided with two connecting plates. The end of the connecting plate near the fixed shaft 17 is set as a sleeve structure. The inner wall of the sleeve structure is rotatably connected to the outer wall of the fixed shaft 17 via a torsion spring. The ends of the two connecting plates away from the fixed shaft 17 are respectively rotatably connected to the two ends of the contact block 19 via bearings. It should be noted that the connecting frames 18 of the two collision assemblies can be of the same length or different lengths, as long as it is ensured that in the natural state, the contact block 19 located above the inclined surface of the guide plate 13 contacts the moving frame 10 first. Therefore, in use... During mold closing, the movable frame 10 is separated from both collision components, and the contact block 19 of the collision component above the inclined surface of the guide plate 13 is close to the bottom of the movable frame 10. During mold opening, the bottom of the movable frame 10 first contacts and collides with the contact block 19 of the collision component above the inclined surface of the guide plate 13, and mechanical vibration assists in the shedding and falling of sprue waste. As the movable frame 10 continues to descend, it pushes the two contact blocks 19 and the connecting frame 18 downward, causing the two contact blocks 19 to roll outward and the two connecting frames 18 to open. The rolling of the contact blocks 19 on the outer wall of the bottom of the movable frame 10 assists in generating mechanical vibration. Then the movable frame 10 will collide and push with the contact block 19 of the collision component below the inclined surface of the guide plate 13 again. Through the successive contact collisions and the rolling of the contact blocks 19 at different positions, mechanical vibration is generated to assist in the shedding of sprue waste, ensuring the effectiveness of sprue waste recycling in the continuous injection molding process and avoiding affecting subsequent injection molding operations. It should be further explained that the two contact blocks 19 in the same collision assembly can be at the same height or at different heights under normal conditions. When they are at the same height, the moving frame 10 will contact the two contact blocks 19 at the same time when it descends and approaches. When they are at different heights, the moving frame 10 will approach the two contact blocks 19 one after the other, resulting in mechanical vibration due to the time difference. The two contact blocks 19 in the same collision assembly can be at different heights under normal conditions by setting the length of the connecting frame 18 or by setting the torsion spring.
[0023] In this invention, a plurality of grooves 20 are provided at the bottom of the movable frame 10 corresponding to the position of the contact block 19. The distribution of the plurality of grooves 20 is the same as the moving direction of the contact block 19. After the contact block 19 contacts and collides with the movable frame 10, the contact block 19 rolls outward and will contact the corresponding grooves 20 at intervals. Through the contact between the contact block 19 and the edge of the groove 20, the mechanical vibration force generated by rolling is enhanced, which further improves the removal effect of the sprue waste and avoids affecting the subsequent injection molding operation.
[0024] In this invention, the contact block 19 and the fixed block 12 are positioned correspondingly. That is, the contact block 19 is positioned at the groove 11 in the direction of movement after being pushed, and the axial length of the contact block 19 is greater than the width of the fixed block 12. This ensures the rolling activity area of the contact block 19 and the contact effect between the contact block 19 and the bottom of the moving frame 10 during the rolling process, especially when crossing the groove 11. Furthermore, by reducing the width of the fixed block 12, the rolling contact area of the contact block 19 can be differentiated between the middle plate 24 and the fixed block 12, thereby increasing the variation effect of mechanical vibration and improving the unloading effect of the sprue waste.
[0025] Example 2: Refer to Figures 1-8 An injection molding equipment with a waste recycling component is provided, based on Example 1, and also equipped with an equipment operation status monitoring and early warning mechanism.
[0026] In this invention, the monitoring and early warning mechanism includes an angle detection unit and a cylinder position detection unit; The angle detection unit uses a miniature angle sensor. The miniature angle sensor body is fixedly installed on the outer side wall of the fixing frame 16. The detection shaft of the miniature angle sensor is coaxially arranged with the fixing shaft 17. The end of the detection shaft is circumferentially locked to the sleeve part of the connecting frame 18 by a set screw, so that when the connecting frame 18 deflects around the fixing shaft 17, it can drive the detection shaft to rotate synchronously, thereby collecting the opening angle value of the connecting frame 18 relative to the fixing frame 16 in real time. The cylinder positioning detection unit reuses the magnetic switch that comes with cylinder 3. The magnetic switch is fixed to the outer wall of cylinder 3 at the preset position corresponding to the mold opening position. It is a standard matching detection element of cylinder 3. The switching signal of the magnetic switch is connected to the original PLC control system of the equipment as the reference trigger signal for the moving frame 10 to move down to the set position after mold opening.
[0027] In this invention, the judgment threshold of the monitoring and early warning mechanism is determined through the calibration process before the equipment is put into production. The specific calibration process is as follows: after the equipment is installed and debugged, the mold is assembled and is in normal working condition with no load and no waste, 15 complete mold opening-closing cycles are executed continuously. The opening angle data of the 18 connecting frames corresponding to the moment the magnetic switch is triggered is recorded one by one. After removing abnormal values with obvious deviations, the arithmetic mean of the remaining valid data is taken, and this average value is set as the standard reference angle value. Then, ±5% of the standard reference angle value is used as the allowable deviation threshold, where the value below 5% of the reference value is the early warning threshold for angle too small, and the value above 5% of the reference value is the early warning threshold for angle too large.
[0028] In this invention, during normal equipment operation, the monitoring and early warning mechanism collects two signals in real time and performs coupled comparison. The specific judgment logic is as follows: When the moving frame 10 completes the mold opening action and the magnetic switch triggers the positioning signal, if the opening angle of the connecting frame 18 is within the allowable deviation threshold range, it is determined that the collision component and the mold opening mechanism are operating normally. If the opening angle of the connecting frame 18 is lower than the angle too small warning threshold, it indicates that the roller surface of the contact block 19 has been worn due to long-term collision, the diameter has decreased, or the spring force of the torsion spring has weakened, resulting in insufficient opening stroke of the connecting frame 18, triggering the collision component wear warning, prompting maintenance personnel to check and replace vulnerable parts in time to avoid the decrease in the vibration force leading to incomplete detachment of sprue waste. If the opening angle of the connecting frame 18 has reached the standard reference angle value, but the magnetic switch still does not trigger the position signal, it means that the actual downward stroke of the moving frame 10 is less than the set stroke. There are problems such as cylinder 3 stroke drift, wear of the guide sleeve of the column 8 causing running jamming, or abnormal changes in the thickness of the mold assembly. This triggers the mold opening stroke abnormality warning to avoid the product being removed and the waste material being recycled due to insufficient mold opening, and to prevent mold collision damage during mold closing.
[0029] In this invention, the monitoring and early warning design with dual signal coupling can predict the wear trend of vulnerable parts of the collision component in advance, realize preventive maintenance, avoid problems such as sprue sticking and waste accumulation after the collision vibration function fails, ensure the continuity and stability of the waste recycling process, and reduce the frequency of manual cleaning.
[0030] Example 3: Reference Figures 1-8An injection molding equipment with a waste recycling component, based on Embodiment 1 or Embodiment 2, has horizontally extending air blowing components 21 on both sides of the guide plate 13. The air blowing components 21 are located above the guide plate 13. Specifically, the air blowing components 21 have horizontally extending air outlets on the sides facing the guide plate 13, and are connected to an air pump through air pipes to achieve air blowing. The air blowing components 21 are located outside the trough 11. During use, the air blowing operation on both sides assists in moving the waste material falling from the trough 11 toward the guide plate 13 in the middle position, avoiding the waste material from being pulled out of the guide plate 13 and affecting the recycling effect.
[0031] Example 4: Reference Figures 1-8 An injection molding equipment with a waste recycling component, based on embodiment 3, has elastic ropes 22 fixed on both sides of the trough 11. The elastic ropes 22 extend between the two ends of the moving frame 10. The elastic ropes 22 are located in the trough 11 near the middle plate 24. Multiple impact beads 23 are fixed on the outer wall of the elastic ropes 22. The blowing intensity of the air blowing component 21 changes periodically. Thus, the airflow changes cause the impact beads 23 to repeatedly strike the middle plate 24 of the moving frame 10, thereby increasing the mechanical vibration effect and improving the shedding of sprue waste.
[0032] 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. An injection molding machine with a waste recycling component, comprising a mounting frame, an upper mold (1), a lower mold (2), and an injector (4), wherein the upper mold (1) is fixed to the top of the mounting frame, and a vertically driven cylinder (3) is connected below the lower mold (2), characterized in that, The mounting frame is provided with a base plate (6) and a top plate (7). Four columns (8) are fixed between the base plate (6) and the top plate (7). The bottom of the lower mold (2) is fixed with a movable frame (10) connected to the cylinder (3). The movable frame (10) has a groove (11) with a U-shape structure on the periphery of the lower mold (2). A fixing block (12) is fixed on the inner wall of the groove (11). The outer ring cross section of the groove (11) is larger than the cross section of the lower mold (2). An inclined guide plate (13) is provided below the movable frame (10).
2. The injection molding equipment with a waste recycling component according to claim 1, characterized in that, A vertically extending connecting rod (15) is fixed between the top of the cylinder (3) and the moving frame (10). A hole is provided on the guide plate (13) that is slidably connected to the connecting rod (15). The guide plate (13) is inclined downward in one direction and bent upward on both sides.
3. The injection molding equipment with a waste recycling component according to claim 2, characterized in that, The guide plate (13) is fixedly installed between the guide plate (13) and the mounting frame. The guide plate (13) is provided with telescopic collision components at both ends of the connecting rod (15).
4. The injection molding equipment with a waste recycling component according to claim 3, characterized in that, The collision assembly is provided with two fixed frames (16) installed on the guide plate (13). A fixed shaft (17) is fixed between the two fixed frames (16). Two connecting frames (18) are rotatably connected to the outer wall of the fixed shaft (17) by a torsion spring. Both connecting frames (18) are inclined upwards in the direction away from the fixed shaft (17). A roller-shaped contact block (19) is rotatably connected to the connecting frame (18) away from the fixed shaft (17).
5. The injection molding equipment with a waste recycling component according to claim 4, characterized in that, The bottom of the movable frame (10) is provided with multiple grooves (20) at the position corresponding to the contact block (19), and the distribution of the multiple grooves (20) is the same as the moving direction of the contact block (19).
6. The injection molding equipment with a waste recycling component according to claim 4, characterized in that, The contact block (19) is positioned corresponding to the fixed block (12), and the axial length of the contact block (19) is greater than the width of the fixed block (12).
7. An injection molding equipment with a waste recycling component according to any one of claims 4 to 6, characterized in that, It also includes a monitoring and early warning system, which includes an angle detection unit and a cylinder position detection unit; The angle detection unit is a miniature angle sensor. The miniature angle sensor is fixedly installed on the outer side wall of the fixed frame (16). The detection shaft of the miniature angle sensor is coaxially arranged with the fixed shaft (17). The end of the detection shaft is locked and fixed with the sleeve part of the connecting frame (18) and synchronously driven, which is used to collect the opening angle of the connecting frame (18) in real time. The cylinder position detection unit is a magnetic switch that comes with cylinder 1 (3), and the signal from the magnetic switch is connected to the PLC control system.
8. An injection molding equipment with a waste recycling component according to claim 7, characterized in that, The PLC control system has a preset standard reference angle value and an allowable deviation threshold, with the allowable deviation threshold being ±5% of the standard reference angle value. The PLC control system couples and compares the magnetic switch position signal with the connecting frame (18) opening angle signal. When the magnetic switch triggers the position signal and the opening angle of the connecting frame (18) is lower than the small warning threshold, a collision component wear warning is triggered. When the opening angle of the connecting frame (18) reaches the standard reference angle value and the magnetic switch does not trigger the position signal, an abnormal mold opening stroke warning is triggered.
9. An injection molding equipment with a waste recycling component according to any one of claims 1 to 6, characterized in that, Both sides of the guide plate (13) are provided with horizontally extending air blowing elements (21), the air blowing elements (21) are located above the guide plate (13), and the air blowing elements (21) are located outside the trough (11).
10. An injection molding equipment with a waste recycling component according to claim 9, characterized in that, Elastic ropes (22) are fixed on both sides of the trough (11). The elastic ropes (22) extend in the direction between the two ends of the moving frame (10). Multiple impact beads (23) are fixed on the outer wall of the elastic ropes (22). The blowing intensity of the blowing component (21) changes periodically.