Ejection device of plastic product injection mold

Abstract

The utility model discloses a plastic product injection mold ejection device which comprises a lower mold, a fixing block is arranged at the bottom end of the lower mold, a bottom plate is arranged at the bottom end of the fixing block, a controller is fixedly connected to the front end of the bottom plate, and a first electric push rod is fixedly connected to the center of the top end of the bottom plate. Through arrangement of a first electric push rod, a pressing block, a pressure sensor, a second electric push rod, a clamping block and a first spring, when an ejector pin is close to an overload state in the process of ejecting an injection-molded plastic product by using the device, the first electric push rod pushes the pressing block to press the pressure sensor, so that a pressure value detected by the pressure sensor exceeds a set range; furthermore, the second electric push rod is contracted to drive the clamping block to be separated from the sliding block, the ejector pin can continuously drive the fixing ring to compress the first spring to be stored in the fixing block when the ejector pin is close to the overload state, and therefore the phenomenon that the ejector pin is broken when being in the overload state for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mold ejection devices, in particular to an ejection device for a plastic product injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products, and is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine, and obtaining a molded product after cooling and solidification. An injection mold ejector device refers to a device that ejects the molded product from the mold during the injection molding production process. The mold ejector device is one of the important components of the mold. When the molded plastic product is ejected by the mold ejector device, due to the limited application range and load-bearing capacity of the mold ejector device, when the ejector pin in the ejector device is overloaded for a long time, it will cause the ejector pin to break. Therefore, in response to the above problems, an ejector device for an injection mold for plastic products is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model overcomes the existing defects and can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A plastic product injection mold ejection device comprises a lower mold, a fixed block is provided at the bottom end of the lower mold, a bottom plate is provided at the bottom end of the fixed block, a controller is fixedly connected to the front end of the bottom plate, a first electric push rod is fixedly connected to the center of the top end of the bottom plate, a pressure block is fixedly connected to the top end of the first electric push rod, and the pressure block is slidably connected to the fixed block, a pressure sensor in contact with the fixed block is fixedly connected to the top end of the pressure block, a slider is slidably connected to the top end of the inner side of the fixed block, an ejector pin that penetrates the fixed block and the lower mold is spirally connected at the center of the top end of the slider, and the ejector pin is slidably connected to the fixed block and the lower mold, a second electric push rod is fixedly connected to the top end of the outer side of the fixed block, and a clamping block is fixedly connected to one end of the second electric push rod.

[0006] As a further improvement of the utility model, a fixing plate is fixedly connected to the outer side of the fixing block, a guide shaft penetrating the fixing plate is slidably connected to the inner side of the fixing plate, and the guide shaft is fixedly connected to the lower mold and the bottom plate.

[0007] As a further improvement of the present invention, one end of the clamping block is arranged in a frustum shape, and the clamping block is slidably connected to the fixed block, and the clamping block is clamped and connected to the sliding block.

[0008] As a further improvement of the utility model, a reset switch in contact with a fixed block is fixedly connected to the top edge of the slider, a fixing ring is fixedly connected to the top outer side of the ejector pin, a first spring is provided at the bottom outer side of the ejector pin, and the first spring is fixedly connected to the fixing ring and the fixed block.

[0009] As a further improvement of the utility model, the bottom end of the slider contacts a control switch, the bottom end of the control switch is fixedly connected to a slide plate slidably connected to a fixed block, the bottom end of the slide plate is fixedly connected to a second spring, and the other end of the second spring is fixedly connected to the fixed block, and an alarm is fixedly connected to the outside of the fixed plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. A plastic product injection mold ejection device, which is provided with a first electric push rod, a pressure block, a pressure sensor, a second electric push rod, a clamping block and a first spring. In the process of using the device to eject the injection-molded plastic product, when the ejector is close to an overload state, the first electric push rod pushes the pressure block to press the pressure sensor so that the pressure value detected by the pressure sensor exceeds a set range, and further the second electric push rod is contracted to drive the clamping block to disengage from the slider. When the ejector is close to an overload state, the ejector can continuously drive the fixing ring to compress the first spring and store it in the fixing block, thereby avoiding the phenomenon that the ejector is in an overload state for a long time and breaks.

[0012] 2. A plastic product injection mold ejection device, which is provided with a control switch, a slider, a slide plate, a second spring and an alarm. During the overload protection process of the ejector, the ejector is stored in a fixed block while the slider and the fixed block are continuously pushed to slide. The control switch is simultaneously triggered by the slider to make the slide plate continuously compress the second spring, and the alarm can be activated to sound an alarm. By activating the alarm, the staff is reminded, which facilitates the staff to quickly determine the cause of the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of an ejection device of a plastic product injection mold.

[0015] Figure 2 The utility model is a cross-sectional structural schematic diagram of an ejection device of a plastic product injection mold.

[0016] Figure 3 The utility model is a schematic diagram of the overall installation structure of a card block of an ejection device of a plastic product injection mold.

[0017] In the figure: 1. lower mold; 2. fixed block; 3. bottom plate; 4. controller; 5. first electric push rod; 6. pressure block; 7. pressure sensor; 8. fixed plate; 9. guide shaft; 10. slider; 11. ejector pin; 12. second electric push rod; 13. clamping block; 14. reset switch; 15. fixed ring; 16. first spring; 17. control switch; 18. slide plate; 19. second spring; 20. alarm. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and cannot be understood as limitations on this patent. In order to better illustrate the specific implementation methods of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific implementation methods in the utility model, all other specific implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] like Figure 1-3 As shown, a plastic product injection mold ejection device comprises a lower mold 1, a fixed block 2 is provided at the bottom end of the lower mold 1, a bottom plate 3 is provided at the bottom end of the fixed block 2, a controller 4 is fixedly connected to the front end of the bottom plate 3, a first electric push rod 5 is fixedly connected to the center of the top end of the bottom plate 3, a pressure block 6 is fixedly connected to the top end of the first electric push rod 5, and the pressure block 6 is slidably connected to the fixed block 2, a pressure sensor 7 in contact with the fixed block 2 is fixedly connected to the top end of the pressure block 6, a slider 10 is slidably connected to the top end of the inner side of the fixed block 2, an ejector pin 11 that penetrates the fixed block 2 and the lower mold 1 is spirally connected at the center of the top end of the slider 10, and the ejector pin 11 is slidably connected to the fixed block 2 and the lower mold 1, a second electric push rod 12 is fixedly connected to the top end of the outer side of the fixed block 2, and a clamping block 13 is fixedly connected to one end of the second electric push rod 12.

[0021] Example 2

[0022] like Figure 1-2 As shown, in order to solve the problem of poor stability of the fixed block 2 in driving the ejector 11 to move upward, a fixed plate 8 is fixedly connected to the outer side of the fixed block 2, and a guide shaft 9 penetrating the fixed plate 8 is slidably connected to the inner side of the fixed plate 8, and the guide shaft 9 is fixedly connected to the lower mold 1 and the bottom plate 3. When the fixed block 2 drives the ejector 11 to move upward, the fixed plate 8 on the outer side of the fixed block 2 continuously slides along the guide shaft 9, so that the fixed block 2 drives the ejector 11 to move upward with better stability.

[0023] Example 3

[0024] like Figure 2-3 As shown, in order to solve the problem that it is inconvenient to control the card block 13 to be accurately locked with the slider 10 when the second electric push rod 12 is extended, one end of the card block 13 is set in a cone shape, and the card block 13 is slidably connected to the fixed block 2, and the card block 13 is engaged with the slider 10. By setting the end of the card block 13 that is engaged with the slider 10 in a cone shape, it is convenient to control the card block 13 to be accurately locked with the slider 10 when controlling the second electric push rod 12 to be extended.

[0025] Example 4

[0026] like Figure 1-2 As shown, in order to solve the problem that it is inconvenient to control the blocking block 13 to be re-engaged with the slider 10 when the first electric push rod 5 is controlled to retract and reset after the ejector 11 is stored in the fixed block 2, a reset switch 14 in contact with the fixed block 2 is fixedly connected at the top edge of the slider 10, and a fixing ring 15 is fixedly connected to the top of the outer side of the ejector 11. A first spring 16 is provided at the bottom of the outer side of the ejector 11, and the first spring 16 is fixedly connected to the fixing ring 15 and the fixing block 2. When the first electric push rod 5 is controlled to retract and reset after the ejector 11 is stored in the fixed block 2, the elastic force of the first spring 16 on the fixing ring 15 further pushes the ejector 11 to drive the slider 10 to trigger the reset switch 14, which facilitates the resetting of the second electric push rod 12 to extend again, and then facilitates pushing the blocking block 13 to reset and be re-engaged with the slider 10.

[0027] Example 5

[0028] like Figure 1-2 As shown, in order to solve the problem that it is inconvenient to remind the staff when the ejector pin 11 is close to the overload state, the bottom end of the slider 10 contacts with a control switch 17, and the bottom end of the control switch 17 is fixedly connected with a slide plate 18 slidably connected to the fixed block 2, and the bottom end of the slide plate 18 is fixedly connected with a second spring 19, and the other end of the second spring 19 is fixedly connected to the fixed block 2, and the outer side of the fixed plate 8 is fixedly connected with an alarm 20. When the ejector pin 11 is close to the overload state and is received in the fixed block 2, the slider 10 is pushed by the ejector pin 11 to trigger the control switch 17, and at the same time, the slide plate 18 compresses the second spring 19, further triggering the alarm 20, which is convenient for reminding the staff when the ejector pin 11 is close to the overload state.

[0029] In this embodiment, when the device is used to eject the molded plastic product, the sensing range of the pressure sensor 7 is first set by the controller 4. When the first electric push rod 5 extends to control the ejector 11 at the top of the fixed block 2 to eject the molded plastic product so that the ejector 11 is close to an overload state, the first electric push rod 5 pushes the pressure block 6 to press the pressure sensor 7 so that the pressure value detected by the pressure sensor 7 exceeds the set range, and the second electric push rod 12 will shrink and drive the block 13 with a frustum shape at one end to disengage from the slider 10. When the block 13 is completely disengaged from the slider 10, the ejector 11 will continuously push the slider 10 to be retracted in the fixed block 2, thereby realizing overload protection for the ejector 11. At the same time, , because the ejector 11 will also drive the fixing ring 15 to compress the first spring 16, and at the same time push the slider 10 to trigger the control switch 17 so that the slide plate 18 compresses the second spring 19. At this time, when the ejector 11 is stored in the fixing block 2 and pushes the slider 10 to trigger the control switch 17, the alarm 20 will sound an alarm to remind the staff of the fault. After the fault is solved, the staff controls the first electric push rod 5 to retract through the controller 4, and cooperates with the elastic force of the first spring 16 on the fixing block 2 in the retracted state to make the ejector 11 pull the slider 10 to trigger the reset switch 14, and the second electric push rod 12 can be reset to make the blocking block 13 and the slider 10 stuck together, so as to ensure the normal use of the device after the fault is solved.

[0030] The above is a preferred implementation mode of the utility model. The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Technical personnel in this industry should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A plastic product injection mold ejection device, comprising a lower mold (1), characterized in that: A fixed block (2) is provided at the bottom end of the lower mold (1), a bottom plate (3) is provided at the bottom end of the fixed block (2), a controller (4) is fixedly connected to the front end of the bottom plate (3), a first electric push rod (5) is fixedly connected to the center of the top end of the bottom plate (3), a pressure block (6) is fixedly connected to the top end of the first electric push rod (5), the pressure block (6) is slidably connected to the fixed block (2), a pressure sensor (7) in contact with the fixed block (2) is fixedly connected to the top end of the pressure block (6), a slider (10) is slidably connected to the top end of the inner side of the fixed block (2), a pin (11) which penetrates the fixed block (2) and the lower mold (1) is spirally connected to the top end of the slider (10), and the pin (11) is slidably connected to the fixed block (2) and the lower mold (1), a second electric push rod (12) is fixedly connected to the top end of the outer side of the fixed block (2), and a clamping block (13) is fixedly connected to one end of the second electric push rod (12).

2. The ejection device for a plastic product injection mold according to claim 1, characterized in that: The outer side of the fixed block (2) is fixedly connected to a fixed plate (8), the inner side of the fixed plate (8) is slidably connected to a guide shaft (9) that penetrates the fixed plate (8), and the guide shaft (9) is fixedly connected to the lower mold (1) and the bottom plate (3).

3. The ejection device for a plastic product injection mold according to claim 1, characterized in that: One end of the clamping block (13) is arranged in a frustum shape, and the clamping block (13) is slidably connected to the fixed block (2), and the clamping block (13) is clamped and connected to the sliding block (10).

4. The ejection device for a plastic product injection mold according to claim 1, characterized in that: A reset switch (14) in contact with the fixed block (2) is fixedly connected at the top edge of the slider (10); a fixing ring (15) is fixedly connected to the top of the outer side of the ejector pin (11); a first spring (16) is provided at the bottom of the outer side of the ejector pin (11); and the first spring (16) is fixedly connected to the fixing ring (15) and the fixed block (2).

5. The ejection device for a plastic product injection mold according to claim 2, characterized in that: The bottom end of the slider (10) contacts a control switch (17), the bottom end of the control switch (17) is fixedly connected to a slide plate (18) slidably connected to a fixed block (2), the bottom end of the slide plate (18) is fixedly connected to a second spring (19), and the other end of the second spring (19) is fixedly connected to the fixed block (2), and an alarm (20) is fixedly connected to the outside of the fixed plate (8).

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