Automatic discharging mechanism for injection molding machine

By designing an automatic feeding mechanism for injection molding machines, and utilizing lifting, moving, and movable components, the automatic ejection and pushing of products is achieved, solving the safety hazards of manual feeding and improving production safety and efficiency.

CN224334943UActive Publication Date: 2026-06-09ZHEJIANG EASYSTAR ELECTRONIC MATERIALS CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG EASYSTAR ELECTRONIC MATERIALS CO LTD
Filing Date
2025-07-21
Publication Date
2026-06-09

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    Figure CN224334943U_ABST
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Abstract

The utility model discloses an automatic unloading mechanism for injection molding machine, including base, the inside fixed mounting of base has lower mould, the top of base is provided with lifting assembly, the top of base is provided with upper mould through lifting assembly, the top fixed mounting of upper mould has injection molding machine body, the bottom of lower mould is provided with moving assembly, the bottom of lower mould is provided with moving frame through moving assembly, the top fixed mounting of moving frame has thimble, the thimble is connected with lower mould sliding, the top of base is provided with movable assembly, the top of base is provided with push frame through movable assembly, from ejection to remove mould area one gas, completely replace manual reach for piece, and the operator need not again wear heat -proof gloves and approach high -temperature mould, fundamentally eliminate scald, clip hurt hidden danger.
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Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an automatic feeding mechanism for injection molding machines. Background Technology

[0002] An injection molding machine, also known as an injection molding machine or injection molding machine, is a primary molding device that uses plastic molds to produce various shapes of plastic products from thermoplastic or thermosetting plastics. During operation, the upper and lower molds are combined, and then the injection molding machine injects material into the mold cavity, thus molding the product within the cavity.

[0003] In the existing technology, the unloading process of injection molding machines still mostly relies on manual parts handling. Operators need to wear heat-resistant gloves and wait for the mold to open next to the high-temperature and high-humidity machine. Then, they need to lean into the mold area, judge the degree of product cooling based on experience, and then remove the still-heated plastic parts one by one from the lower mold cavity by hand or simple clamps. Some injection molding machines are equipped with mechanical ejection mechanisms on the mold to replace manual "part removal". However, the ejected products still need to be removed manually afterward. Therefore, this utility model provides an automatic unloading mechanism for injection molding machines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic feeding mechanism for injection molding machines to solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic unloading mechanism for an injection molding machine includes a base, a lower mold fixedly installed inside the base, a lifting component on the top of the base, an upper mold mounted on the top of the base via the lifting component, an injection molding machine body fixedly installed on the top of the upper mold, a moving component at the bottom of the lower mold, a moving frame at the bottom of the lower mold via the moving component, an ejector pin fixedly installed on the top of the moving frame, the ejector pin being slidably connected to the lower mold, a movable component on the top of the base, and a pushing frame on the top of the base via the movable component.

[0007] Preferably, the lifting assembly includes a support frame disposed on the top of the base, a hydraulic push rod fixedly installed on the top of the support frame, the output end of the hydraulic push rod being fixedly connected to the upper mold, and a movable rod slidably connected inside the support frame, the movable rod being fixedly connected to the upper mold.

[0008] Preferably, the moving component includes a first frame disposed at the bottom of the lower mold, a first motor fixedly mounted at the bottom of the first frame, the output end of the first motor extending through the first frame into the interior of the first frame and fixedly mounted with a first screw, the first screw being threadedly connected to the moving frame, and the moving frame being slidably connected to the first frame.

[0009] Preferably, the active component includes a second frame disposed on the top of the base, a second motor fixedly mounted on the left side of the second frame, the output end of the second motor extending through the second frame into the interior of the second frame and fixedly mounted with a second screw, a movable block threadedly connected to the surface of the second screw, the movable block being slidably connected to the second frame, and the movable block being fixedly connected to the push frame.

[0010] Preferably, a pressure plate is fixedly installed inside the movable frame, a pressure sensor is fixedly installed at the bottom of the lower mold, and a controller is fixedly installed on the front side of the base.

[0011] Preferably, a ramp is fixedly installed on the top of the base, and the ramp is located on the right side of the lower mold.

[0012] Preferably, there are multiple movable rods, and the multiple movable rods are symmetrically distributed.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The automatic unloading mechanism of this injection molding machine moves the upper mold upward to a suitable position through the lifting component during unloading. The moving component moves the moving frame, pressure plate, and ejector pin upward, causing the ejector pin to lift the product in the lower mold. When the pressure plate contacts the pressure sensor, the pressure sensor generates pressure. Subsequently, the pressure sensor sends a signal to the controller, causing the controller to stop the moving component and control the moving component to move. The moving component drives the pusher to move to the right, causing the pusher to push the product to move to the right. The entire process from ejection to removal from the mold area is completed in one go, completely replacing manual hand-picking. Operators no longer need to wear heat-resistant gloves to approach the high-temperature mold, fundamentally eliminating the risk of burns and pinching. Attached Figure Description

[0014] Figure 1 This is a three-dimensional perspective view of the present invention;

[0015] Figure 2 This is a rear sectional view of the present invention;

[0016] Figure 3 This is a partial structural diagram of the present invention;

[0017] Figure 4 This is an exploded view of another partial structure of the present invention.

[0018] In the diagram: 1. Base; 2. Lower mold; 3. Support frame; 4. Hydraulic push rod; 5. Movable rod; 6. Upper mold; 7. Injection molding machine body; 8. First frame; 9. First motor; 10. First screw; 11. Moving frame; 12. Ejector pin; 13. Pressure plate; 14. Pressure sensor; 15. Controller; 16. Second frame; 17. Second motor; 18. Second screw; 19. Moving block; 20. Push frame; 21. Ramp. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Refer to Figure 1-4An automatic unloading mechanism for an injection molding machine includes a base 1, a lower mold 2 fixedly installed inside the base 1, a lifting assembly on the top of the base 1, an upper mold 6 mounted on the top of the base 1 via the lifting assembly, an injection molding machine body 7 fixedly mounted on the top of the upper mold 6, a moving assembly at the bottom of the lower mold 2, a moving frame 11 at the bottom of the lower mold 2 via the moving assembly, an ejector pin 12 fixedly mounted on the top of the moving frame 11, the ejector pin 12 being slidably connected to the lower mold 2, and a movable assembly on the top of the base 1 via the movable assembly, which provides a pushing mechanism. The frame 20 includes a movable component comprising a second frame 16 mounted on top of the base 1. A second motor 17 is fixedly mounted on the left side of the second frame 16. The output end of the second motor 17 extends through the second frame 16 and into its interior, where a second screw 18 is fixedly mounted. A moving block 19 is threadedly connected to the surface of the second screw 18. The moving block 19 is slidably connected to the second frame 16 and fixedly connected to the push frame 20. This movable component facilitates the provision of driving force for the movement of the push frame 20, thereby enabling the automatic pushing of the product away from the mold. A pressure plate 13 is fixedly installed inside the movable frame 11. A pressure sensor 14 is fixedly installed at the bottom of the lower mold 2. A controller 15 is fixedly installed on the front side of the base 1. The controller 15 can control the operation of the electrical components mentioned in the text. A ramp 21 is fixedly installed on the top of the base 1. The ramp 21 is located on the right side of the lower mold 2. This injection molding machine uses an automatic unloading mechanism. During unloading, the lifting component moves the upper mold 6 upward to a suitable position. The moving component moves the movable frame 11, pressure plate 13, and ejector pin 12 upward, so that the ejector pin 12 pushes the lower mold... When the product in part 2 is lifted, the pressure plate 13 contacts the pressure sensor 14, causing the pressure sensor 14 to generate pressure. Subsequently, the pressure sensor 14 sends a signal to the controller 15, which controls the moving component to stop running and controls the active component to run. This causes the active component to drive the pusher 20 to move to the right, which in turn pushes the product to the right. The entire process from ejection to removal from the mold area is completed in one go, completely replacing manual hand-picking. Operators no longer need to wear heat-resistant gloves to approach the high-temperature mold, fundamentally eliminating the risk of burns and pinching.

[0021] Specifically, the lifting assembly includes a support frame 3 set on the top of the base 1, a hydraulic push rod 4 fixedly installed on the top of the support frame 3, the output end of the hydraulic push rod 4 being fixedly connected to the upper mold 6, and a movable rod 5 slidably connected inside the support frame 3. There are multiple movable rods 5, and the multiple movable rods 5 are symmetrically distributed to facilitate the vertical movement of the upper mold 6. The movable rods 5 are fixedly connected to the upper mold 6. Through the setting of the lifting assembly, it is convenient to provide driving force for the vertical movement of the upper mold 6.

[0022] Specifically, the moving component includes a first frame 8 disposed at the bottom of the lower mold 2. A first motor 9 is fixedly installed at the bottom of the first frame 8. The output end of the first motor 9 extends through the first frame 8 into the interior of the first frame 8 and is fixedly installed with a first screw 10. The first screw 10 is threadedly connected to the moving frame 11, and the moving frame 11 is slidably connected to the first frame 8. The moving component facilitates the provision of driving force for the moving frame 11 to move up and down, thereby facilitating the ejector pin 12 to automatically lift the product from the lower mold 2.

[0023] All electrical components mentioned in this article are connected to 220V AC mains power, and the main controller can be a conventional known device such as a computer for control.

[0024] In use: The controller 15 causes the hydraulic push rod 4 to push the upper mold 6, the movable rod 5, and the injection molding machine body 7 downwards, so that the upper mold 6 contacts the lower mold 2. Then, the injection molding machine body 7 performs injection molding. After molding, the controller 15 causes the hydraulic push rod 4 to push the upper mold 6, the movable rod 5, and the injection molding machine body 7 upwards to a suitable position. The controller 15 causes the first motor 9 to drive the first screw 10 to rotate, so that the moving frame 11, the ejector pin 12, and the pressure plate 13 move upwards, so that the ejector pin 12 lifts the product. When the pressure plate 13 contacts the pressure sensor 14, the pressure sensor 14 generates pressure. Then, the pressure sensor 14 sends a signal to the controller 15, so that the controller 15 controls the first motor 9 to stop running and controls the second motor 17 to run, so that the second motor 17 drives the second screw 18 to rotate, so that the moving block 19 and the push frame 20 move to the right, so that the push frame 20 pushes the product to the right, so that the product enters the next process along the ramp 21.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding mechanism for an injection molding machine, comprising a base (1), characterized in that, The base (1) has a lower mold (2) fixedly installed inside. The base (1) has a lifting component on top. The base (1) has an upper mold (6) on top via the lifting component. The upper mold (6) has an injection molding machine body (7) fixedly installed on top. The lower mold (2) has a moving component at the bottom. The lower mold (2) has a moving frame (11) at the bottom via the moving component. The moving frame (11) has an ejector pin (12) fixedly installed on top. The ejector pin (12) is slidably connected to the lower mold (2). The base (1) has a movable component on top. The base (1) has a pusher frame (20) on top via the movable component.

2. The automatic feeding mechanism for an injection molding machine according to claim 1, characterized in that, The lifting assembly includes a support frame (3) disposed on the top of the base (1), a hydraulic push rod (4) is fixedly installed on the top of the support frame (3), the output end of the hydraulic push rod (4) is fixedly connected to the upper mold (6), and a movable rod (5) is slidably connected inside the support frame (3), and the movable rod (5) is fixedly connected to the upper mold (6).

3. The automatic feeding mechanism for an injection molding machine according to claim 1, characterized in that, The moving component includes a first frame (8) disposed at the bottom of the lower mold (2), a first motor (9) is fixedly installed at the bottom of the first frame (8), the output end of the first motor (9) extends through the first frame (8) into the interior of the first frame (8) and is fixedly installed with a first screw (10), the first screw (10) is threadedly connected to the moving frame (11), and the moving frame (11) is slidably connected to the first frame (8).

4. The automatic feeding mechanism for an injection molding machine according to claim 1, characterized in that, The active component includes a second frame (16) disposed on the top of the base (1). A second motor (17) is fixedly installed on the left side of the second frame (16). The output end of the second motor (17) extends through the second frame (16) into the interior of the second frame (16) and is fixedly installed with a second screw (18). A moving block (19) is threadedly connected to the surface of the second screw (18). The moving block (19) is slidably connected to the second frame (16) and is fixedly connected to the pusher frame (20).

5. The automatic feeding mechanism for an injection molding machine according to claim 1, characterized in that, A pressure plate (13) is fixedly installed inside the movable frame (11), a pressure sensor (14) is fixedly installed at the bottom of the lower mold (2), and a controller (15) is fixedly installed on the front side of the base (1).

6. The automatic feeding mechanism for an injection molding machine according to claim 1, characterized in that, The base (1) is fixedly mounted with a ramp (21) on top, and the ramp (21) is located on the right side of the lower mold (2).

7. An automatic feeding mechanism for an injection molding machine according to claim 2, characterized in that, The number of movable rods (5) is multiple, and the multiple movable rods (5) are symmetrically distributed.