High efficiency injection molding machine for injection mold

Abstract

The application relates to the field of injection molding machines, in particular to a high-efficiency injection molding machine for an injection mold, which comprises a workbench, a feeding device mounted on the workbench and a mold closing device mounted on the workbench, the mold closing device comprises a fixed mold mounted on the workbench and abutting against the feeding device, a movable mold slidingly connected to the fixed mold and a driving assembly for driving the movable mold to slide, a discharging device is arranged on the workbench, the discharging device comprises a mounting frame fixed to the workbench, a mounting rod slidingly connected to the mounting frame, a first ejector pin fixed to the mounting rod and a second ejector pin fixed to the mounting rod, the first ejector pin is slidingly connected to the movable mold, and the second ejector pin is slidingly connected to the fixed mold; a linkage device is arranged between the first ejector pin and the movable mold, the linkage device drives the first ejector pin and the second ejector pin to sequentially unload a workpiece from the movable mold and the fixed mold through the sliding of the movable mold. The application has the effect that the workpiece can be smoothly demolded, and the injection efficiency is ensured.

Description

Technical Field

[0001] This application relates to the field of injection molding machines, and more particularly to a high-efficiency injection molding machine for injection molds. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. They are classified as vertical, horizontal, and all-electric, with horizontal injection molding machines being widely used due to their advantages in ease of maintenance and material feeding.

[0003] A horizontal injection molding machine mainly includes a worktable, a feeding device mounted on the worktable, a mold closing device mounted on the worktable and located at the discharge port of the feeding device, and a cooling system mounted on the mold closing device. The mold closing device includes a fixed mold connected to the feeding device, a moving mold slidably connected to the fixed mold, a drive assembly that drives the moving mold to slide, and ejector pins slidably connected to the fixed mold. In use, material is injected between the moving mold and the fixed mold through the feeding device. Under the action of the cooling system, the material is cooled and solidified. Then, the drive assembly drives the moving mold to slide, causing the moving mold to separate from the fixed mold. At this time, the solidified workpiece will stick to the fixed mold. The ejector pins can then push the workpiece off the fixed mold to achieve demolding. The ejected workpiece will fall from the discharge port on the worktable into the material box on the lower side of the worktable under the action of gravity, thus achieving workpiece collection.

[0004] However, in actual use, when the drive component causes the moving mold to separate from the fixed mold, the workpiece may stick to the fixed mold. In this case, the operator needs to manually remove the workpiece from the moving mold to unload it, which is very troublesome and reduces the efficiency of injection molding. Summary of the Invention

[0005] In order to ensure smooth demolding of workpieces and guarantee injection molding efficiency, this application provides a high-efficiency injection molding machine for injection molds.

[0006] This application provides a high-efficiency injection molding machine for injection molds, which adopts the following technical solution:

[0007] A high-efficiency injection molding machine for injection molds includes a worktable, a feeding device mounted on the worktable, and a mold closing device mounted on the worktable. The mold closing device includes a fixed mold mounted on the worktable and abutting against the feeding device, a moving mold slidably connected to the fixed mold, and a drive assembly for driving the moving mold to slide. An unloading device is provided on the worktable, comprising a mounting bracket fixed to the worktable, a mounting rod slidably connected to the mounting bracket, a first ejector pin fixed to the mounting rod, and a second ejector pin fixed to the mounting rod. The first ejector pin is slidably connected to the moving mold, and the second ejector pin is slidably connected to the fixed mold. A linkage device is provided between the first ejector pin and the moving mold, through which the sliding of the moving mold drives the first ejector pin and the second ejector pin to sequentially unload the workpiece from the moving mold and the fixed mold.

[0008] By adopting the above technical solution, during use, material is injected between the moving mold and the fixed mold through the feeding device. After the material is shaped into a workpiece between the fixed mold and the moving mold, the driving component drives the moving mold to slide away from the fixed mold to achieve demolding. Through the linkage device, the second ejector pin slides relative to the moving mold, allowing it to extend from the end of the moving mold and push the workpiece off the moving mold. As the moving mold moves, the linkage device also drives the first ejector pin to slide relative to the fixed mold, allowing its end to extend from the end of the fixed mold to push the workpiece off the fixed mold, achieving demolding of the workpiece from the fixed mold. This ensures that when the driving component drives the moving mold to slide, the linkage device can automatically drive the first and second ejector pins to demold the workpiece, guaranteeing injection molding efficiency.

[0009] Optionally, a limiting groove is formed inside the moving mold, and the first ejector pin passes through the limiting groove. The linkage device includes a limiting plate slidably connected in the limiting groove, and the limiting plate is fixed to the first ejector pin. When the limiting plate is located at the end of the limiting groove away from the fixed mold, the end of the first ejector pin is flush with the side of the moving mold facing the fixed mold, and the end of the second ejector pin is flush with the end of the fixed mold facing the moving mold. When the driving assembly drives the moving mold to move away from the fixed mold, the first ejector pin slides in the limiting groove so that the end of the moving mold extends out of the moving mold. When the limiting plate is located at the end of the limiting groove facing the fixed mold, the moving mold drives the second ejector pin to move through the limiting plate, and the second ejector pin extends out from the end of the fixed mold.

[0010] By adopting the above technical solution, under normal conditions, the limiting plate is located in the limiting groove at the end furthest from the fixed mold, and the end of the first ejector pin is flush with the end of the moving mold. When the driving assembly drives the moving mold to slide, the moving mold will slide relative to the first ejector pin. At this time, the limiting plate also slides from the end of the limiting groove furthest from the fixed mold to the end of the limiting groove closest to the fixed mold. At this time, the end of the first ejector pin will extend out of the moving mold to separate the workpiece from the moving mold. As the driving assembly drives the moving mold to continue moving, the end of the limiting groove will also slide away from the fixed mold along with the limiting plate. At this time, the limiting plate will also drive the second ejector pin to slide away from the fixed mold through the first ejector pin and the mounting rod, thereby causing the end of the second ejector pin to extend out from the end of the fixed mold, thus detaching the workpiece from the fixed mold and realizing demolding of the workpiece, which is more convenient.

[0011] Optionally, the mounting frame includes a support frame fixed to the worktable and a first fixing plate fixed to the worktable. The mounting rod is slidably connected to the support frame. The linkage device further includes a clamping component disposed between the first fixing plate and the first ejector pin to increase the clamping force of the first ejector pin. The first fixing plate is located on the side of the moving mold away from the fixed mold.

[0012] By adopting the above technical solution, the abutting force of the first ejector pin can be increased by the abutting component, so that when the moving mold slides, the first ejector pin can smoothly push the workpiece off the moving mold.

[0013] Optionally, the clamping assembly includes a clamping spring fixed between the first fixing plate and the first ejector pin.

[0014] By adopting the above technical solution, the clamping spring can apply clamping force to the first ejector pin.

[0015] Optionally, a limiting block is fixed to the mounting rod to restrict the mounting rod from sliding to its limit position under the action of the clamping component. When the limiting block abuts against the support frame, the limiting plate is located at the end of the limiting groove away from the fixed mold.

[0016] By adopting the above technical solution, when the moving mold slides to abut against the fixed mold, the limiting block also abuts against the support frame. Under the limiting action of the limiting block, the extreme position of the first ejector pin is fixed, so that the limiting plate is located at the end of the limiting groove away from the fixed mold, thus preventing the first ejector pin from extending from the end of the moving mold under the abutting action of the clamping component and affecting the forming of the workpiece.

[0017] Optionally, the workbench is equipped with a trimming device for cleaning burrs on the workpiece. The trimming device is located directly below the moving mold and the fixed mold. A conveying device is also provided for conveying the workpiece trimmed by the trimming device to the next process. The conveying device is located below the trimming device.

[0018] By adopting the above technical solution, since the fixed mold has a feeding port connected to the feeding device, when the workpiece is shaped, the material at the feeding port will also be connected to the workpiece as a whole. The excess burrs at the feeding port can be trimmed by the trimming device to ensure the forming quality of the workpiece.

[0019] Optionally, the workbench is provided with a discharge port for the workpiece to fall into. The trimming device includes a discharge channel fixed to the workbench and communicating with the discharge port, a trimming shear fixed to the side of the discharge channel near the fixed mold, an auxiliary discharge assembly slidably connected in the discharge channel for pushing the workpiece to slide in the discharge channel, and a connecting assembly for realizing the detachable connection of the trimming shear.

[0020] By adopting the above technical solution, when the workpiece falls from the moving mold and the fixed mold, the workpiece will fall vertically downward into the feeding channel. When the workpiece reaches the trimming shear, the trimming shear will abut against the surface of the workpiece and be located below the burrs. The feeding assembly can drive the workpiece to slide downward, so that the trimming shear can trim the burrs off the workpiece.

[0021] Optionally, the auxiliary feeding assembly includes a linear motor fixed to the outer wall of the feeding channel, a mounting block fixed to the slider of the linear motor, and an auxiliary plate hinged to the mounting block. The auxiliary plate is located inside the feeding channel. A sliding groove for the mounting block to slide is provided on the side wall of the feeding channel. A torsion spring is installed on the hinge shaft of the auxiliary plate. A fixing block is fixed to the side of the mounting block facing the auxiliary plate. The fixing block is located on the upper side of the auxiliary plate. The auxiliary plate abuts against the fixing block under the action of the torsion spring.

[0022] By adopting the above technical solution, the linear motor will drive the auxiliary plate to reciprocate through the mounting block. When the auxiliary plate moves upward and abuts against the workpiece, due to the hinged design of the auxiliary plate, the auxiliary plate will bend around its own hinge axis and compress the torsion spring, thereby causing the auxiliary plate to slide from between the workpiece and the side wall of the unloading channel to the upper side of the workpiece.

[0023] Optionally, the feeding channel is inclined, with its lower end inclined toward the direction of the fixed mold.

[0024] By adopting the above technical solution, when the workpiece arrives at the unloading channel, the workpiece can fit against the side of the unloading channel away from the cutting shears, ensuring that the workpiece can pass between the workpiece and the cutting shears.

[0025] Optionally, an installation groove is provided through the side wall of the feeding channel for the trimmer to slide into. A connecting groove communicating with the installation groove is provided on one side of the installation groove. The connecting assembly includes an abutment block slidably connected in the connecting groove, a connecting spring fixed to the abutment block and the bottom of the connecting groove, and a pull rod fixed to the end of the abutment block facing the connecting spring. The end of the pull rod away from the abutment block passes through the side wall of the feeding channel and is exposed to the outside.

[0026] By adopting the above technical solution, under normal circumstances, the trimmer is installed in the mounting groove. The spring force of the connecting spring causes the abutment block to abut against the trimmer, thus fixing the trimmer in position within the mounting groove. When the trimmer wears out after a period of use, the pull rod can be pulled from the outside. The pull rod will pull the abutment block back into the connecting groove, thereby squeezing the connecting spring and releasing the engagement between the abutment block and the trimmer. At this point, the operator can replace the trimmer, making the operation more convenient.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. This application mounts both the first ejector pin and the second ejector pin on the mounting rod, and sets a linkage device between the first ejector pin and the moving mold. When the drive assembly drives the moving mold to move, the moving mold moves relative to the first ejector pin, causing the first ejector pin to push the workpiece off the moving mold. When the moving mold moves a certain distance, the linkage device causes the first ejector pin to move with the moving mold, thereby causing the first ejector pin to drive the second ejector pin to move, causing the second ejector pin to push the workpiece off the fixed mold, thus achieving workpiece unloading. Since the workpiece is pushed off by the first ejector pin and the second ejector pin respectively, the smooth demolding of the workpiece is guaranteed, and the workpiece will not stick to the fixed mold and require manual unloading by the operator, thus ensuring injection molding efficiency.

[0029] 2. The cooperation of the limiting plate and the limiting groove can limit the relative sliding position of the first ejector pin relative to the moving mold, so that after the moving mold slides a set length relative to the first ejector pin, the moving mold can drive the first ejector pin to move together, causing the second ejector pin to slide relative to the fixed mold.

[0030] 3. The setting of the clamping spring and the limiting block can increase the clamping force of the first ejector pin while fixing the first ejector pin in its normal position. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this application.

[0032] Figure 2 This is a front view sectional view of this application.

[0033] Figure 3This is a cross-sectional diagram to illustrate the structure of the limiting groove and the limiting plate.

[0034] Figure 4 This is a cross-sectional diagram showing another section of the connecting component structure.

[0035] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0036] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Discharge port; 12. Support leg; 2. Feeding device; 3. Mold closing device; 31. Fixed mold; 311. Injection port; 32. Moving mold; 321. Limiting groove; 33. Drive assembly; 4. Unloading device; 41. Mounting bracket; 411. Support frame; 412. First fixing plate; 42. Mounting rod; 421. Limiting block; 43. First ejector pin; 44. Second ejector pin; 45. First connecting ring; 46. Second connecting ring; 5. Linkage device; 51. Limiting plate; 52. Clamping assembly; 521. Clamping spring 522. Spring; 6. Telescopic rod; 7. Trimming device; 8. Feeding channel; 9. Slide; 10. Mounting slot; 11. Connecting slot; 12. Trimming shears; 13. Auxiliary feeding assembly; 14. Auxiliary plate; 15. Linear motor; 16. Mounting block; 17. Fixing block; 18. Connecting assembly; 19. Abutment block; 10. Connecting spring; 11. Pull rod; 12. Waste channel; 13. Collection box; 14. Slot; 15. Buckle; 16. Conveying device; 17. Conveying table; 18. Conveying belt; 19. Conveying motor. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] This application discloses a high-efficiency injection molding machine for injection molds. (Refer to...) Figure 1 and Figure 2 A high-efficiency injection molding machine for injection molds includes a worktable 1, a feeding device 2 mounted on the worktable 1, and a mold closing device 3 mounted on the worktable 1. The mold closing device 3 includes a fixed mold 31 mounted on the worktable 1 and abutting against the discharge end of the feeding device 2; a movable mold 32 slidably connected to the worktable 1 and located on the side of the fixed mold 31 away from the feeding device 2; and a drive assembly 33 for driving the movable mold 32 to slide. When the drive assembly 33 drives the movable mold 32 to abut against the fixed mold 31, a mold closing space is formed between the movable mold 32 and the fixed mold 31 for material to be embedded and shaped into a workpiece. The feeding device 2 communicates with the mold closing space. In use, material is injected into the mold closing space through the feeding device 2. After the material cools and solidifies, the drive assembly 33 drives the movable mold 32 to move away from the fixed mold 31, thereby opening the mold closing space and removing the shaped workpiece.

[0039] Among them, injection ports 311 are provided on opposite sides of the fixed mold 31. The injection ports 311 connect the feeding device 2 and the mold closing space, so that the material in the feeding device 2 will reach the mold closing space through the injection ports 311.

[0040] Reference Figure 1 and Figure 2 To facilitate the removal of the shaped workpiece from the mold-closing space and achieve unloading, an unloading device 4 is provided on the worktable 1. The unloading device 4 includes a mounting bracket 41 fixed to the worktable 1, a mounting rod 42 slidably connected to the mounting bracket 41, a first ejector pin 43 fixed to the mounting rod 42, and a second ejector pin 44 fixed to the mounting rod 42. The mounting rod 42 is U-shaped. The first ejector pin 43 and the second ejector pin 44 are respectively fixed to the U-shaped opening end of the mounting rod 42 and are arranged opposite to each other. The first ejector pin 43 passes through the moving mold 32 and slides with the moving mold 32, and the second ejector pin 44 passes through the fixed mold 31 and slides with the fixed mold 31. When the fixed mold 31 and the moving mold 32 are engaged together, the end of the first ejector pin 43 away from the mounting rod 42 is flush with the side of the moving mold 32 facing the fixed mold 31, and the end of the second ejector pin 44 away from the mounting rod 42 is flush with the side of the fixed mold 31 facing the moving mold 32. A linkage device 5 is also provided between the first ejector pin 43 and the moving mold 32. The sliding motion of the moving mold 32 drives the first ejector pin 43 and the second ejector pin 44 to sequentially unload the workpiece from the moving mold 32 and the fixed mold 31. When the drive assembly 33 drives the moving mold 32 to slide away from the fixed mold 31, the linkage device 5 causes the moving mold 32 to slide relative to the first ejector pin 43. At this time, the end of the first ejector pin 43 away from the mounting rod 42 extends out of the moving mold 32 towards the fixed mold 31, thereby pushing the molded workpiece off the moving mold 32 and achieving smooth demolding of the workpiece from the moving mold 32. When the moving mold 32 slides a set length, the linkage device 5 causes the first ejector pin 43 to move together with the moving mold 32. The first ejector pin 43 drives the second ejector pin 44 to move towards the moving mold 32 via the mounting rod 42, causing the side of the second ejector pin 44 away from the mounting rod 42 to extend out of the fixed mold 31 towards the moving mold 32, thereby pushing the workpiece off the fixed mold 31 and achieving unloading.

[0041] The drive assembly 33 can be a drive cylinder, with the main body of the drive cylinder fixedly connected to the worktable 1 and the piston rod of the drive cylinder fixedly connected to the moving mold 32. Of course, the drive assembly 33 can also be an electric push rod, as long as it can drive the moving mold 32 to reciprocate to achieve mold opening or closing.

[0042] Reference Figure 3A limiting groove 321 is formed inside the moving mold 32. The linkage device 5 includes a limiting plate 51 slidably connected in the limiting groove 321. The first ejector pin 43 passes through the limiting groove 321, and the limiting plate 51 is fixed to the first ejector pin 43. When the end of the first ejector pin 43 is flush with the side of the moving mold 32 facing the mold closing space, the limiting plate 51 is located on the side of the limiting groove 321 away from the fixed mold 31. The length of the limiting groove 321 is the aforementioned set length. When the moving mold 32 slides relative to the first ejector pin 43, the limiting plate 51 also slides in the limiting groove 321. When the limiting plate 51 slides from the end of the limiting groove 321 away from the fixed mold 31 to the end closer to the fixed mold 31, the moving mold 32 will drive the first ejector pin 43 to slide away from the fixed mold 31 through the limiting plate 51.

[0043] Reference Figure 1 and Figure 2 The mounting frame 41 includes a support frame 411 fixed to the workbench 1, a mounting rod 42 slidably connected to the support frame 411 at its middle part, and a first ejector pin 43 and a second ejector pin 44 located on both sides of the support frame 411 respectively.

[0044] To prevent the first ejector pin 43 from being unable to push the workpiece down due to the workpiece's pushing force when the moving mold 32 slides and extends from the end of the moving mold 32, thus preventing the moving mold 32 from moving before reaching the set sliding length, the mounting bracket 41 also includes a first fixing plate 412 fixed to the worktable 1. The linkage device 5 also includes a clamping component 52 disposed between the first fixing plate 412 and the first ejector pin 43. The first fixing plate 412 is located on the side of the moving mold 32 away from the fixed mold 31. The clamping component 52 can increase the clamping force of the first ejector pin 43, ensuring that the first ejector pin 43 can push the workpiece down from the moving mold 32.

[0045] Reference Figure 1 and Figure 2 The clamping assembly 52 includes a clamping spring 521 fixed between the first fixed plate 412 and the first ejector pin 43, and a telescopic rod 522 fixed between the first fixed plate 412 and the first ejector pin 43. The clamping spring 521 is sleeved on the telescopic rod 522. The clamping spring 521 can apply a clamping force to the first ejector pin 43 to ensure that the first ejector pin 43 can smoothly push the workpiece off the moving mold 32. The telescopic rod 522 can limit the extension and retraction direction of the clamping spring 521 to prevent the clamping spring 521 from radially deviating.

[0046] Meanwhile, to prevent the first ejector pin 43 from protruding from the end of the moving mold 32 when the moving mold 32 and the fixed mold 31 are engaged under the action of the clamping spring 521, thus affecting the integrity of the workpiece in the mold closing space, a limiting block 421 is fixedly attached to the mounting rod 42. The limiting block 421 is located on the side of the support frame 411 facing the first ejector pin 43. When the moving mold 32 slides to engage with the fixed mold 31, and the limiting block 421 abuts against the support frame 411, the limiting plate 51 is located at the end of the limiting groove 321 away from the fixed mold 31, and the end of the first ejector pin 43 away from the mounting rod 42 is flush with the side of the moving mold 32 facing the fixed mold 31.

[0047] To facilitate smooth demolding of the workpiece, multiple first ejector pins 43 are spaced around the center of the moving mold 32. One of the first ejector pins 43 passes through and is fixedly connected to the limiting plate 51, while the remaining first ejector pins 43 are slidably connected to the moving mold 32. First connecting rings 45 are fixedly connected between the multiple first ejector pins 43, allowing all the first ejector pins 43 to move synchronously, applying resistance forces to multiple points on the workpiece and thus smoothly ejecting the workpiece from the moving mold 32.

[0048] Meanwhile, multiple second ejector pins 44 can be arranged around the center of the fixed mold 31, and multiple second ejector pins 44 are slidably connected to the fixed mold 31. A second connecting ring 46 is fixed between multiple second ejector pins 44 to achieve synchronous movement of multiple second ejector pins 44.

[0049] It is understood that the feeding device 2 is the same as the feeding device 2 of the existing injection molding machine, and will not be described again here. In addition, the feeding device 2 is equipped with a heating device for heating the material, and the fixed mold 31 is equipped with a cooling device for cooling the material in the mold closing space so that the workpiece can be quickly shaped. This is also existing technology, and will not be described in detail in this solution.

[0050] When the feeding device 2 injects the material into the mold closing space through the injection port 311, the material will remain at the injection port 311. When the workpiece in the mold closing space cools and solidifies, the material in the injection port will solidify with the workpiece, resulting in burrs on the surface of the workpiece and affecting the appearance of the workpiece.

[0051] Therefore, a trimming device 6 for trimming burrs on the workpiece is also installed on the workbench 1, and a conveying device 7 for transporting the trimmed workpiece to the next process is also provided under the workbench 1. The trimming device 6 can automatically trim the burrs on the workpiece, ensuring the workpiece's appearance and reducing the obstruction caused by burrs during installation. The trimmed workpiece falls onto the conveying device 7, which then transports it to the next process.

[0052] Reference Figure 2 and Figure 3 A discharge port 11 for dropping workpieces is provided on the worktable 1, and the discharge port 11 is located directly below the mold closing space. The trimming device 6 includes a discharge channel 61 fixed to the lower side of the worktable 1 and communicating with the discharge port 11, a trimming shear 62 detachably connected to the side of the discharge channel 61 near the fixed mold 31, an auxiliary discharge assembly 63 slidably connected in the discharge channel 61 for pushing the workpiece to slide in the discharge channel 61, and a connecting assembly 64 for fixing the trimming shear 62 in the discharge channel 61. The auxiliary feeding component 63 is located above the trimming shears 62 and is used to push the workpiece across the trimming shears 62. When the workpiece falls out of the mold closing space, it will fall into the feeding channel 61 and be located on one side of the trimming shears 62. When the trimming shears 62 comes into contact with the burrs on the workpiece, it will prevent the workpiece from continuing to slide down. At this time, the auxiliary feeding component 63 will push the workpiece to continue to slide down, so that the trimming shears 62 will trim the burrs on the workpiece. The trimmed workpiece will continue to fall down to the conveying device 7.

[0053] Reference Figure 3 and Figure 4 The trimming shears 62 are inclined, with one end of the trimming shears 62 tilted upwards within the feeding channel 61 to facilitate trimming burrs on the workpiece. Simultaneously, a mounting groove 612 is provided on the side of the feeding channel 61 facing the fixed mold 31 for inserting the trimming shears 62. The middle part of the trimming shears 62 is located within the mounting groove 612, while the side with the blade is located within the feeding channel 61 for trimming burrs on the workpiece. A connecting assembly 64 is provided on the side wall of the mounting groove 612 to fix the position of the trimming shears 62 within the mounting groove 612.

[0054] Reference Figure 4 and Figure 5 A connecting groove 613 communicating with the mounting groove 612 is provided on one side of the mounting groove 612. The connecting assembly 64 includes an abutment block 641 slidably connected in the connecting groove 613, a connecting spring 642 fixedly connected to the abutment block 641 and the bottom of the connecting groove 613, and a pull rod 643 fixedly connected to the end of the abutment block 641 facing the connecting spring 642. The end of the pull rod 643 away from the abutment block 641 passes through the bottom of the connecting groove 613 and protrudes to the outside. Under normal conditions, under the elastic force of the connecting spring 642, the abutment block 641 extends out of the connecting groove 613 and abuts against the trimmer 62 located in the mounting groove 612, thereby fixing the trimmer 62 in the position of the mounting groove 612. When the trimmer scissors 62 need to be replaced, the staff can pull the lever 643 from the outside, which will cause the abutment block 641 to retract into the connecting groove 613. At this time, the abutment block 641 also squeezes the connecting spring 642. The staff can then operate the trimmer scissors 62 to slide in the mounting groove 612 to remove the trimmer scissors 62 and replace it.

[0055] Among them, two connecting components 64 can be arranged at intervals along the length direction of the blade of the trimmer 62 to fix both sides of the trimmer 62 more firmly.

[0056] The two opposite sides of the trimmer 62 are serrated. The serrations are located on both sides of the trimmer 62 near the connecting component 64. The side of the mounting groove 612 away from the connecting groove 613 and the side of the abutment block 641 away from the connecting spring 642 are both provided with serrations that cooperate with the trimmer 62. When the trimmer 62 is installed in the mounting groove 612, the serrations in the mounting groove 612 cooperate with the serrations on one side of the trimmer 62, and the serrations on the abutment block 641 cooperate with the serrations on the other side of the trimmer 62, making the trimmer 62 more securely fixed.

[0057] Reference Figure 4 and Figure 5 A waste channel 65 is provided on one side of the unloading channel 61 where the mounting groove 612 is opened, which is connected to the mounting groove 612. The waste channel 65 is located between the two connecting components 64 and above the trimmer 62, so that when the trimmer 62 trims the burrs on the workpiece, the trimmed burrs will be discharged from the unloading channel 61 along the waste channel 65.

[0058] Reference Figure 4 A collection box 66 for collecting the trimmed burrs is detachably connected to one side of the feeding channel 61. The end of the trimming shears 62 located outside the feeding channel 61 is directly above the collection box 66, so that the trimmed burrs can smoothly reach the collection box 66 along the trimming shears 62. The trimming shears 62 can guide the burrs.

[0059] Specifically, a box-shaped slot 67 is fixed to one side wall of the feeding channel 61, where the mounting groove 612 is formed. The upper end of the slot 67 is open, and two slots 67 form a group, with the two slots 67 in the same group spaced apart along the length of the feeding channel 61. An L-shaped buckle 68 is fixed to the collection box 66, and two buckles 68 form a group. The two buckles 68 in the same group can be inserted into the two slots 67 in the same group, thereby fixing the position of the collection box 66 on the feeding channel 61. Of course, multiple groups of slots 67 can also be spaced apart along the height of the feeding channel 61, and correspondingly, multiple groups of buckles 68 can also be spaced apart along the height of the collection box 66, as long as each buckle 68 corresponds to each slot 67 and can fix the position of the collection box 66 on the feeding channel 61. When there are many burrs in the collection box 66, you can directly operate the buckle 68 to pull it out from the slot 67, and then remove the collection box 66 from the feeding channel 61. Then you can empty the burrs in the collection box 66, making cleaning more convenient.

[0060] Reference Figure 4The auxiliary unloading assembly 63 includes an auxiliary plate 631 slidably connected within the unloading channel 61 and a linear motor 632 for driving the auxiliary plate 631 to move vertically. The linear motor 632 can be mounted on the outer wall of the unloading channel 61 and is located on the side close to the trimmer 62. The linear motor 632 is located above the trimmer 62. A mounting block 633 is fixedly connected to the slider of the linear motor 632. The auxiliary plate 631 is mounted on the mounting block 633, and a sliding groove 611 is provided through both the inner and outer sides of the unloading channel 61 for the mounting block 633 to slide. The linear motor 632 can drive the auxiliary plate 631 mounted on the mounting block 633 to move vertically, thereby providing a downward force to the workpiece located in the unloading channel 61.

[0061] To prevent the workpiece from abutting against the auxiliary plate 631 and failing to fall downwards when it reaches the unloading channel 61, the auxiliary plate 631 is hinged to the mounting block 633. A torsion spring is installed on the hinge axis of the auxiliary plate 631, and a fixing block 634 is fixedly connected to the mounting block 633. The fixing block 634 is located on the upper side of the auxiliary plate 631. One end of the torsion spring abuts against the side of the auxiliary plate 631 away from the fixing block 634, and the other end abuts against the mounting block 633. Under normal conditions, the torsion spring pushes the auxiliary plate 631 against the fixing block 634, at which point the auxiliary plate 631 is in a horizontal state. When the auxiliary plate 631 abuts against the workpiece and moves the workpiece downwards, the fixing block 634 ensures that the auxiliary plate 631 can apply force to the workpiece normally, thus ensuring the normal descent of the workpiece so that the trimming shears 62 can trim the burrs on the workpiece. When a new workpiece falls onto the auxiliary plate 631, the workpiece's gravity will cause the auxiliary plate 631 to rotate around the hinge axis between itself and the mounting block 633, allowing the workpiece to slide smoothly from the side of the auxiliary plate 631 away from the linear motor 632 to the underside of the auxiliary plate 631, and be pushed downwards by the auxiliary plate 631, ensuring the smooth trimming of burrs on the workpiece.

[0062] In order to ensure that the workpiece is always located on the side of the auxiliary plate 631 away from the linear motor 632, the unloading channel 61 can be set to be tilted as a whole, and the unloading channel 61 is gradually tilted from top to bottom towards the direction of the linear motor 632. This allows the workpiece that enters the unloading channel 61 to always be close to the side of the unloading channel 61 away from the slide 611 under the action of gravity, so that the workpiece can slide smoothly from the side wall of the unloading channel 61 and the auxiliary plate 631 to the lower side of the auxiliary plate 631.

[0063] Reference Figure 1The workbench 1 has four support legs 12 on its underside. The conveying device 7 includes a conveyor platform 71 located under the workbench 1, a drive roller (not shown) rotatably connected to the conveyor platform 71, a driven roller (not shown) rotatably connected to the conveyor platform 71, a conveyor belt 72 sleeved on the drive roller and the driven roller, and a conveyor motor 73 fixed to the conveyor platform 71 for driving the drive roller to rotate. The output shaft of the conveyor motor 73 is connected to the drive roller. Driven by the conveyor motor 73, the conveyor belt 72 moves from the side of the feeding channel 61 away from the linear motor 632 to the side of the feeding channel 61 closer to the linear motor 632. When the workpiece in the feeding channel 61 reaches the conveyor belt 72, the conveyor belt 72 will drive the workpiece to move towards the linear motor 632 in the direction of the feeding channel 61. The direction of movement of the workpiece is consistent with the inclination direction of the feeding channel 61, so that the workpiece can smoothly move from the feeding channel 61 to the conveyor belt 72.

[0064] The implementation principle of a high-efficiency injection molding machine for injection molds according to an embodiment of this application is as follows: During use, the feeding device 2 conveys the molten material through the injection port 311 to the mold closing space, where it cools and forms a workpiece. After the workpiece is shaped, the operator directly operates the drive assembly 33 to drive the moving mold 32 to slide away from the fixed mold 31. Due to the setting of the abutment assembly 52, the first ejector pin 43 does not move with the moving mold 32. At this time, the limiting plate 51 also slides in the limiting groove 321, and the end of the first ejector pin 43 extends from the end of the moving mold 32 to push the workpiece off the moving mold 32. As the moving mold 32 continues to slide, when the limiting plate 51 and the limiting groove 321 abut against the side of the fixed mold 31, the moving mold 32 will drive the first ejector pin 43 to move together in the direction of the driving assembly 33. At this time, the first ejector pin 43 will drive the second ejector pin 44 to move through the mounting rod 42, so that the end of the second ejector pin 44 extends out of the side wall of the fixed mold 31, thereby pushing the workpiece off the fixed mold 31 and realizing the demolding of the workpiece. The workpiece will fall into the unloading channel 61 under the action of gravity, and under the action of gravity, the auxiliary plate 631 will rotate around the hinge axis of the auxiliary plate 631 and the mounting block 633 and squeeze the torsion spring, so that a channel for the workpiece to pass through is formed between the auxiliary plate 631 and the inner wall of the unloading channel 61. The workpiece will slide along the channel from the upper side of the auxiliary plate 631 to the lower side of the auxiliary plate 631. When the workpiece slides to the burr on the workpiece, the auxiliary plate 631 will be driven downward by the linear motor 632, pushing the workpiece downward so that the burrs on the workpiece can be easily trimmed off by the trimming shears 62. The workpiece with the burrs trimmed will fall downward from the unloading channel 61 onto the conveyor belt 72, and will be transported by the conveyor belt 72 to the next process.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency injection molding machine for injection molds, comprising a worktable (1), a feeding device (2) mounted on the worktable (1), and a mold clamping device (3) mounted on the worktable (1), wherein the mold clamping device (3) comprises a fixed mold (31) mounted on the worktable (1) and abutting against the feeding device (2), a movable mold (32) slidably connected to the fixed mold (31), and a drive assembly (33) for driving the movable mold (32) to slide, characterized in that: The workbench (1) is provided with a material unloading device (4). The material unloading device (4) includes a mounting bracket (41) fixed to the workbench (1), a mounting rod (42) slidably connected to the mounting bracket (41), a first ejector pin (43) fixed to the mounting rod (42), and a second ejector pin (44) fixed to the mounting rod (42). The first ejector pin (43) is slidably connected to the moving mold (32), and the second ejector pin (44) is slidably connected to the fixed mold (31). A linkage device (5) is provided between the first ejector pin (43) and the moving mold (32) so that the first ejector pin (43) and the second ejector pin (44) can sequentially unload the workpiece from the moving mold (32) and the fixed mold (31) by sliding the moving mold (32). The moving mold (32) has a limiting groove (321) inside, and the first ejector pin (43) passes through the limiting groove (321). The linkage device (5) includes a limiting plate (51) slidably connected in the limiting groove (321), and the limiting plate (51) is fixed to the first ejector pin (43). When the limiting plate (51) is located at the end of the limiting groove (321) away from the fixed mold (31), the end of the first ejector pin (43) is flush with the side of the moving mold (32) facing the fixed mold (31), and the end of the second ejector pin (44) is flush with the side of the fixed mold (31). 31) The end facing the moving mold (32) is flush; when the driving assembly (33) drives the moving mold (32) to move away from the fixed mold (31), the first ejector pin (43) slides in the limiting groove (321) so that the end of the moving mold (32) extends out of the moving mold (32); when the limiting plate (51) is located at the end of the limiting groove (321) facing the fixed mold (31), the moving mold (32) drives the second ejector pin (44) to move through the limiting plate (51), and the second ejector pin (44) extends out from the end of the fixed mold (31); When the drive assembly (33) drives the moving mold (32) to slide away from the fixed mold (31), the linkage device (5) will cause the moving mold (32) to slide relative to the first ejector pin (43). At this time, the end of the first ejector pin (43) away from the mounting rod (42) will extend out of the moving mold (32) towards the fixed mold (31), thereby pushing the molded workpiece off the moving mold (32) and realizing the smooth demolding of the workpiece from the moving mold (32). When the moving mold (32) slides a set length, the linkage device (5) will cause the first ejector pin (43) to move together with the moving mold (32). The first ejector pin (43) will drive the second ejector pin (44) to move towards the moving mold (32) through the mounting rod (42), so that the side of the second ejector pin (44) away from the mounting rod (42) will extend out of the fixed mold (31) towards the moving mold (32), thereby pushing the workpiece off the fixed mold (31) and realizing unloading. The workbench (1) is equipped with a trimming device (6) for cleaning burrs on the workpiece. The trimming device (6) is located directly below the moving mold (32) and the fixed mold (31). A conveying device (7) is also provided for conveying the workpiece trimmed by the trimming device (6) to the next process. The conveying device (7) is located below the trimming device (6). The workbench (1) is provided with a discharge port (11) for the workpiece to fall into. The trimming device (6) includes a discharge channel (61) fixed to the workbench (1) and communicating with the discharge port (11), a trimming shear (62) detachably connected to the side of the discharge channel (61) near the fixed mold (31), an auxiliary discharge assembly (63) slidably connected in the discharge channel (61) for pushing the workpiece to slide in the discharge channel (61), and a connecting assembly (64) for realizing the detachable connection of the trimming shear (62). The auxiliary feeding assembly (63) includes a linear motor (632) fixed to the outer wall of the feeding channel (61), a mounting block (633) fixed to the slider of the linear motor (632), and an auxiliary plate (631) hinged to the mounting block (633). The auxiliary plate (631) is located inside the feeding channel (61). A sliding groove (611) for the mounting block (633) to slide is provided on the side wall of the feeding channel (61). A torsion spring is installed on the hinge shaft of the auxiliary plate (631). A fixing block (634) is fixed to the side of the mounting block (633) facing the auxiliary plate (631). The fixing block (634) is located on the upper side of the auxiliary plate (631). The auxiliary plate (631) abuts against the fixing block (634) under the action of the torsion spring.

2. The high-efficiency injection molding machine for injection molds according to claim 1, characterized in that: The mounting frame (41) includes a support frame (411) fixed to the worktable (1) and a first fixing plate (412) fixed to the worktable (1). The mounting rod (42) is slidably connected to the support frame (411). The linkage device (5) further includes a clamping component (52) disposed between the first fixing plate (412) and the first ejector pin (43) for increasing the clamping force of the first ejector pin (43). The first fixing plate (412) is located on the side of the moving mold (32) away from the fixed mold (31).

3. The high-efficiency injection molding machine for injection molds according to claim 2, characterized in that: The clamping assembly (52) includes a clamping spring (521) fixed between the first fixing plate (412) and the first ejector pin (43).

4. The high-efficiency injection molding machine for injection molds according to claim 2, characterized in that: A limiting block (421) is fixedly attached to the mounting rod (42) to restrict the mounting rod (42) from sliding to the limit position under the action of the clamping component (52). When the limiting block (421) abuts against the support frame (411), the limiting plate (51) is located at the end of the limiting groove (321) away from the fixed mold (31).

5. The high-efficiency injection molding machine for injection molds according to claim 1, characterized in that: The feeding channel (61) is inclined, and the lower end of the feeding channel (61) is inclined toward the direction of the fixed mold (31).

6. The high-efficiency injection molding machine for injection molds according to claim 5, characterized in that: An installation groove (612) for the trimmer (62) to slide into is provided through the side wall of the feeding channel (61). A connecting groove (613) communicating with the installation groove (612) is provided on one side of the installation groove (612). The connecting assembly (64) includes an abutment block (641) slidably connected in the connecting groove (613), a connecting spring (642) fixed to the abutment block (641) and the bottom of the connecting groove (613), and a pull rod (643) fixed to the end of the abutment block (641) facing the connecting spring (642). The end of the pull rod (643) away from the abutment block (641) passes through the side wall of the feeding channel (61) and is exposed to the outside.

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