Delayed ejection device of injection mold

Abstract

The utility model provides a delayed ejection device of an injection mold, which relates to the technical field of delayed ejection and comprises an ejection cylinder, the ejection cylinder is in signal connection with a control circuit, the control circuit is in signal connection with a time relay, the time relay is in signal connection with a master control module and an adjusting button, and the master control module is in signal connection with the adjusting button. The main control module is in signal connection with a temperature sensor and a pressure detection assembly. The injection mold has the advantages that the time relay is additionally arranged in the control circuit of the ejection structure, the control structure capable of adjusting the delay time of the time relay is arranged, and a pressure signal for sensing the opening and closing of the mold and a temperature signal for sensing the temperature of an injection product are added in the signal circuit of the time relay; the time relay is enabled to perform delayed ejection on the injection product after the mold is opened and the injection product is cooled according to the set delay time in combination with the pressure signal and the temperature signal, so that delayed control on the ejection structure is facilitated, and meanwhile, the working safety of the ejection structure is ensured.

Description

Technical Field

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

[0002] Injection molds, also known as injection molding molds, have the advantages of high production efficiency, fast production speed, automated operation, and precise product size. They are widely used in the field of complex product molding. When processing injection molds, the ejector mechanism is used to remove the cooled injection molded product.

[0003] CN202121147303.8 introduces a steel injection mold with a delayed ejection function. After the plastic part is formed, the first electric push rod pushes the slider to slide in the lifting chamber. The slider will drive the ejection block at the top of the ejection shaft to eject, and the guide column on the other side of the slider moves upward, and the shaft rotates. When the guide column rises to a certain position, the rotating rod is also pulled upward, and the delayed ejection shaft connected to one side of the rotating rod is ejected upward, and the delayed ejection block is ejected, so that the ejection block is ejected first, and after a period of time, the delayed ejection block is ejected again, so that complex plastic parts are easier to demold without deformation, and the processing quality of the device is improved. However, the delayed ejection structure is not convenient for adjusting the delay time, and it is not convenient to adjust the delay time according to the use requirements, and it is relatively inconvenient to use. Utility Model Content

[0004] Therefore, the purpose of the utility model is to provide a delayed ejection device for an injection mold to solve the problems mentioned in the background technology and overcome the shortcomings of the prior art.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the utility model on one hand provides a delayed ejection device for an injection mold, comprising a lower mold base, a guide column is fixedly installed inside the lower mold base, an upper mold base is movably connected to the surface of the guide column, a molding cavity is opened inside the lower mold base, an ejection block is movably connected to the bottom of the molding cavity, an ejection cylinder is fixedly installed at the bottom of the ejection block, the ejection cylinder signal is connected to a control circuit, the control circuit signal is connected to a time relay, the time relay signal is connected to a main control module and an adjustment button, the main control module signal is connected to a temperature sensor and a pressure detection component, and a protective pressure block is provided on one side of the pressure detection component and fixedly installed with the lower mold base.

[0006] Preferably, any of the above schemes is that a movable groove adapted to the ejection block is provided inside the lower die base, the movable groove is located below the molding cavity, and a fixed groove adapted to the ejection cylinder is provided at the bottom of the movable groove.

[0007] The above technical solution is adopted: the ejection structure is guided and fixed by the lower mold base, so that the ejection structure can move inside the lower mold base, thereby facilitating ejection of the injection molded product inside the molding cavity.

[0008] Preferably, any of the above schemes is that an ejection boss is provided on the top of the ejection block, the ejection block is movably connected to the inside of the lower die base, and the ejection cylinder is fixedly installed inside the lower die base.

[0009] The above technical solution is adopted: according to the use requirements, the ejection cylinder is controlled to extend and push the ejection block to move upward, so that the ejection block drives the ejection boss to move upward to eject the injection molded product.

[0010] Preferably, any of the above schemes is that the temperature sensor is fixedly mounted on the top of the ejection boss, the time relay signal is connected to an adjustment module, an adjustment button is provided inside the adjustment module, and the adjustment button is movably mounted on one end of the lower mold base.

[0011] The above technical solution is adopted: the top of the ejector boss is fitted with the bottom surface of the injection molded product, the temperature of the injection molded product is detected by a temperature sensor, and the detected temperature is transmitted to the main control module. The main control module controls the control circuit according to the temperature signal combined with the time information set inside the time relay, so that the control circuit controls the ejection cylinder to work. The information can be input into the adjustment module through the adjustment button to adjust the delay time of the time relay. The main function of the time relay is to serve as an executive device in simple program control. When it receives the start signal, it starts timing. After the timing ends, its working contacts open or close, thereby promoting the subsequent circuit work. Generally speaking, the delay performance of the time relay can be adjusted within the design range, so as to facilitate the adjustment of its delay time.

[0012] Preferably, from any of the above schemes, the pressure detection assembly comprises a pressure sensor and a pressure detection sheet, the pressure sensor is fixedly mounted inside the lower die base, and the detection end of the pressure sensor is fixedly mounted with the pressure detection sheet.

[0013] The above technical solution is adopted: the pressure on the surface of the pressure detection plate is detected by a pressure sensor, the pressure condition on the surface of the pressure detection plate is judged according to the pressure value detected by the pressure sensor, and the opening and closing of the mold is judged according to the pressure condition.

[0014] Preferably, any of the above schemes is that a disassembly block is clamped on the surface of the pressure sensor, and the disassembly block is clamped on the inside of the lower mold base.

[0015] By adopting the above technical solution, the pressure sensor can be fastened and locked by the disassembly block, so that the pressure sensor can be easily disassembled and assembled.

[0016] Preferably, from any of the above schemes, the protective pressure block comprises a protective spring and a pressing block, the protective spring is fixedly installed inside the lower die base, and the top end of the protective spring is fixedly installed with a pressing block movably connected to the lower die base.

[0017] The above technical solution is adopted: when the mold is closed, the upper mold base squeezes the pressing block to compress the protective spring, and the pressing block squeezes the pressure detection piece, so that the pressure detection piece transmits the pressure to the pressure sensor, and then the opening and closing of the mold can be judged according to the pressure information.

[0018] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0019] 1. Add a time relay to the control circuit of the ejection structure, and set a control structure that can adjust the delay time of the time relay. Add a pressure signal for sensing the opening and closing of the mold and a temperature signal for sensing the temperature of the injection molded product to the signal circuit of the time relay, so that the time relay combines the pressure signal and the temperature signal according to the set delay time to delay the ejection of the injection molded product after the mold is opened and the injection molded product is cooled, which is convenient for delay control of the ejection structure and ensures the safety of the ejection structure.

[0020] 2. An elastic protective structure is set at the top of the pressure detection structure to improve the protective performance of the pressure detection structure and facilitate stable operation of the mold.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the lower mold base according to an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the explosion structure of the lower die base according to an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a pressure detection assembly according to an embodiment of the utility model;

[0027] Figure 5 It is a delay module distribution diagram according to an embodiment of the utility model;

[0028] Among them: 1-lower die base, 2-guide column, 3-upper die base, 4-molding cavity, 5-ejection block, 6-ejection cylinder, 7-temperature sensor, 8-pressure detection assembly, 81-pressure sensor, 82-pressure detection sheet, 9-protective pressure block, 91-protective spring, 92-pressing block, 10-ejection boss, 11-adjusting button, 12-disassembly block. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0030] like Figure 1-4 As shown, a delayed ejection device of an injection mold in an embodiment of the utility model comprises a lower mold base 1, a guide column 2 is fixedly installed inside the lower mold base 1, an upper mold base 3 is movably connected to the surface of the guide column 2, a molding cavity 4 is opened inside the lower mold base 1, an ejection block 5 is movably connected to the bottom of the molding cavity 4, an ejection cylinder 6 is fixedly installed at the bottom of the ejection block 5, the ejection cylinder 6 signal is connected to a control circuit, the control circuit signal is connected to a time relay, the time relay signal is connected to a main control module and an adjustment button 11, the main control module signal is connected to a temperature sensor 7 and a pressure detection component 8, and a protective pressure block 9 is fixedly installed on one side of the pressure detection component 8 and the lower mold base 1.

[0031] Preferably, any of the above schemes has a movable groove adapted to the ejection block 5 formed inside the lower die base 1 , the movable groove is located below the molding cavity 4 , and a fixed groove adapted to the ejection cylinder 6 is formed at the bottom of the movable groove.

[0032] The above technical solution is adopted: the lower mold base 1 is used to guide and fix the ejection structure, so that the ejection structure can move inside the lower mold base 1, so as to facilitate ejecting the injection molded product inside the molding cavity 4.

[0033] Preferably, any of the above solutions has an ejection boss 10 disposed on the top of the ejection block 5 , the ejection block 5 is movably connected to the inside of the lower die base 1 , and the ejection cylinder 6 is fixedly installed inside the lower die base 1 .

[0034] The above technical solution is adopted: according to the use requirements, the ejection cylinder 6 is controlled to extend to push the ejection block 5 to move upward, so that the ejection block 5 drives the ejection boss 10 to move upward to eject the injection molded product.

[0035] Preferably, any of the above schemes is that the temperature sensor 7 is fixedly mounted on the top of the ejection boss 10, the time relay signal is connected to the adjustment module, an adjustment button 11 is provided inside the adjustment module, and the adjustment button 11 is movably mounted on one end of the lower mold base 1.

[0036] The above technical solution is adopted: the top of the ejector boss 10 is fitted with the bottom surface of the injection molded product, the temperature of the injection molded product is detected by the temperature sensor 7, and the detected temperature is transmitted to the main control module. The main control module controls the control circuit according to the temperature signal combined with the time information set inside the time relay, so that the control circuit controls the ejection cylinder 6 to work, and the information can be input into the adjustment module through the adjustment button 11 to adjust the delay time of the time relay. The main function of the time relay is to serve as an executive device in simple program control. When it receives the start signal, it starts timing. After the timing ends, its working contacts open or close, thereby promoting the subsequent circuit operation. Generally speaking, the delay performance of the time relay can be adjusted within the design range, so as to facilitate the adjustment of its delay time.

[0037] Preferably, from any of the above schemes, the pressure detection assembly 8 includes a pressure sensor 81 and a pressure detection sheet 82 , the pressure sensor 81 is fixedly mounted inside the lower die base 1 , and the pressure detection sheet 82 is fixedly mounted on the detection end of the pressure sensor 81 .

[0038] The above technical solution is adopted: the pressure on the surface of the pressure detection piece 82 is detected by the pressure sensor 81, the pressure condition on the surface of the pressure detection piece 82 is judged according to the pressure value detected by the pressure sensor 81, and the opening and closing conditions of the mold are judged according to the pressure condition.

[0039] Preferably, any of the above solutions has a disassembly block 12 clamped on the surface of the pressure sensor 81 , and the disassembly block 12 is clamped inside the lower die base 1 .

[0040] By adopting the above technical solution, the pressure sensor 81 can be fastened and locked by the disassembly block 12, so that the pressure sensor 81 can be easily disassembled and assembled.

[0041] Preferably, from any of the above schemes, the protective pressure block 9 includes a protective spring 91 and a pressing block 92 , the protective spring 91 is fixedly installed inside the lower die base 1 , and the top end of the protective spring 91 is fixedly installed with a pressing block 92 movably connected to the lower die base 1 .

[0042] The above technical solution is adopted: when the mold is closed, the upper mold base 3 squeezes the pressing block 92 to compress the protective spring 91, and the pressing block 92 squeezes the pressure detection piece 82, so that the pressure detection piece 82 transmits the pressure to the pressure sensor 81, and then the opening and closing of the mold can be judged according to the pressure information.

[0043] The utility model provides a delayed ejection device for an injection mold, and its working principle is as follows:

[0044] When the pressure sensor 81 cannot detect the pressure information and the value detected by the temperature sensor 7 is at a low temperature, the time relay starts timing after receiving the pressure signal and the temperature signal. The timing ends after the set delay time ends, so that the control circuit controls the ejection cylinder 6 to drive the ejection block 5 to eject the injection molded product.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. Add a time relay to the control circuit of the ejection structure, and set a control structure that can adjust the delay time of the time relay. Add a pressure signal for sensing the opening and closing of the mold and a temperature signal for sensing the temperature of the injection molded product to the signal circuit of the time relay, so that the time relay combines the pressure signal and the temperature signal according to the set delay time to delay the ejection of the injection molded product after the mold is opened and the injection molded product is cooled, which is convenient for delay control of the ejection structure and ensures the safety of the ejection structure.

[0047] 2. An elastic protective structure is set at the top of the pressure detection structure to improve the protective performance of the pressure detection structure and facilitate stable operation of the mold.

Claims

1. A delayed ejection device for an injection mold, comprising a lower mold base (1), a guide column (2) fixedly installed inside the lower mold base (1), an upper mold base (3) movably connected to the surface of the guide column (2), and a molding cavity (4) opened inside the lower mold base (1), characterized in that: The bottom of the molding cavity (4) is movably connected to an ejection block (5), the bottom of the ejection block (5) is fixedly installed with an ejection cylinder (6), the ejection cylinder (6) is signal-connected to a control circuit, the control circuit is signal-connected to a time relay and an adjustment button (11), the time relay is signal-connected to a main control module, the main control module is signal-connected to a temperature sensor (7) and a pressure detection component (8), and a protective pressure block (9) is provided on one side of the pressure detection component (8) and is fixedly installed with the lower mold base (1).

2. The delayed ejection device of an injection mold according to claim 1, characterized in that: A movable groove adapted to the ejection block (5) is provided inside the lower die base (1), the movable groove is located below the molding cavity (4), and a fixed groove adapted to the ejection cylinder (6) is provided at the bottom of the movable groove.

3. The delayed ejection device of an injection mold according to claim 2, characterized in that: An ejection boss (10) is provided on the top of the ejection block (5), the ejection block (5) is movably connected to the interior of the lower die base (1), and the ejection cylinder (6) is fixedly installed inside the lower die base (1).

4. The delayed ejection device of an injection mold according to claim 3, characterized in that: The temperature sensor (7) is fixedly mounted on the top of the ejection boss (10); the time relay signal is connected to an adjustment module; an adjustment button (11) is arranged inside the adjustment module; and the adjustment button (11) is movably mounted on one end of the lower die base (1).

5. The delayed ejection device of an injection mold according to claim 4, characterized in that: The pressure detection assembly (8) comprises a pressure sensor (81) and a pressure detection sheet (82); the pressure sensor (81) is fixedly mounted inside the lower die base (1); and the pressure detection sheet (82) is fixedly mounted on the detection end of the pressure sensor (81).

6. A delayed ejection device for an injection mold as claimed in claim 5, characterized in that: A disassembly block (12) is clamped on the surface of the pressure sensor (81), and the disassembly block (12) is clamped inside the lower die base (1).

7. A delayed ejection device for an injection mold according to claim 6, characterized in that: The protective pressure block (9) comprises a protective spring (91) and a pressing block (92); the protective spring (91) is fixedly mounted inside the lower die base (1); and the top end of the protective spring (91) is fixedly mounted with a pressing block (92) movably connected to the lower die base (1).

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