Failure heating protection centralized control system for accessory injection mold

Abstract

The utility model discloses an accessory injection mold fault heating protection centralized control system, which relates to the field of fault protection and is used for improving the production efficiency and saving the production cost. The system comprises a plurality of injection molding machines; each injection molding machine is connected with a set of mold and oil cylinder combination in a matched mode, the injection molding machine is connected with an injection molding machine control PLC, and the injection molding machine PLC is connected with the mold and oil cylinder combination; the injection molding machine PLC is connected with one input end of the power-off protection control PLC, the output end, corresponding to the input end, of the power-off protection control PLC is connected with a hot runner heater relay, and the hot runner heater relay is connected with a hot runner heater of the injection molding machine; a time relay is connected between the input end and the output end of the power-off protection control PLC, wherein the input end and the output end correspond to each other. The time relay and the injection molding machine PLC are respectively connected with a time reset button, and the injection molding machine PLC is connected with an alarm and a delay time display. The system gives an alarm and stops in a delayed manner after a fault occurs, so that the continuity and safety of production are ensured.

Description

Technical Field

[0001] This utility model relates to a fault protection system, and more particularly to a centralized control system for fault heating protection of component injection molds. Background Technology

[0002] Currently, in the injection molding production process, the usual methods for dealing with injection molding machine malfunctions are either to directly stop heating the mold and hydraulic cylinder assembly when a malfunction occurs, or to issue a fault alarm while continuing to heat the mold and hydraulic cylinder assembly. The former approach leads to a direct shutdown when the injection molding machine experiences a false alarm, the malfunction does not affect production, or the malfunction can be resolved during production, causing production interruption. Reheating the mold and hydraulic cylinder assembly consumes additional time and energy, severely impacting production efficiency and costs. While the latter approach's fault alarm serves as a reminder, if no operator intervenes and production is affected—for example, the injection molding machine's continued heating of the mold may cause the temperature inside the mold to exceed the PVC material's tolerance, leading to material waste and potentially damaging the heating element—this also results in decreased productivity, shortened mold life, and increased costs. Utility Model Content

[0003] The purpose of this invention is to provide a centralized control system for heating protection against faults in injection molds for parts, addressing the aforementioned problems. This system enables fault alarms and delayed shutdowns, thereby maximizing production efficiency and saving production costs.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A centralized control system for heating protection in case of injection mold failure for parts, comprising at least one injection molding machine; for each injection molding machine, the following are provided:

[0006] The injection molding machine is matched and connected to a set of molds and hydraulic cylinders. The injection molding machine is connected to an injection molding machine control PLC, and the injection molding machine PLC is connected to the mold and hydraulic cylinder assembly. The injection molding machine PLC is connected to an input terminal of a power failure protection control PLC. The corresponding output terminal of the power failure protection control PLC is connected to a hot runner heater relay, and the hot runner heater relay is connected to the hot runner heater of the injection molding machine. A time relay is connected between the corresponding input and output terminals of the power failure protection control PLC. The time relay is connected to a time reset button, and the injection molding machine PLC is also connected to an alarm.

[0007] Furthermore, the injection molding machine PLC is also connected to a delay time display, and the injection molding machine PLC is also connected to the time reset button.

[0008] Furthermore, the alarm includes a buzzer and / or an indicator light.

[0009] Furthermore, the time reset button, alarm, and delay time display corresponding to each injection molding machine form an alarm control unit, and the alarm control units of each injection molding machine are arranged in the same layout.

[0010] Furthermore, the alarm control units for each injection molding machine are arranged horizontally at intervals on the control panel.

[0011] Furthermore, in the alarm control unit, the time reset button is arranged adjacent to the delay time display.

[0012] Furthermore, in the alarm control unit, the time reset button, the delay time display, and the alarm are arranged in a top, middle, and bottom configuration, respectively.

[0013] Furthermore, each of the aforementioned time relays is arranged side by side within the power failure protection control PLC.

[0014] Furthermore, the hot runner heater relays for each injection molding machine are arranged side by side.

[0015] Furthermore, the power failure protection control PLC and each of the hot runner heater relays are installed in the centralized control cabinet, and the control board is set on the surface of the centralized control cabinet.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] This design features a centralized control system for heating protection in injection mold malfunctions. When a malfunction occurs in the injection molding machine, an alarm sounds and a time relay delays the shutdown. If someone promptly addresses the fault or clears the alarm, the injection molding machine continues operation, ensuring continuous production. If no one addresses the fault in time, the hot runner heater is de-energized after the time relay expires, providing power-off protection and preventing material loss within the mold. This improves work efficiency, saves costs, and extends mold life. The centralized control system can control multiple injection molding machines. When multiple machines malfunction simultaneously, the faults of all machines can be reset simultaneously on the control panel of the centralized control system, significantly reducing troubleshooting time and improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a centralized control system for heating protection against component injection mold failure in one embodiment.

[0019] Figure 2 This is a layout diagram of the control panel.

[0020] The markings in the diagram are as follows: 1 is the injection molding machine, 2 is the injection molding machine PLC, 3 is the time reset button, 4 is the power failure protection control PLC, 5 is the input terminal of the power failure protection control PLC, 6 is the output terminal of the power failure protection control PLC, 7 is the time relay, 8 is the hot runner heater relay, 9 is the hot runner heater, 10 is the mold and cylinder assembly, 11 is the injection molding machine main unit, 12 is the buzzer, 13 is the control board, 14 is the delay time display, and 15 is the indicator light. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] This embodiment uses the centralized control system for heating protection in component injection mold failures, controlling six injection molding machines as an example. Figure 1 As shown, the centralized control system for heating protection in the injection mold for parts includes six injection molding machines 1. Each injection molding machine 1 is matched and connected to a set of mold and hydraulic cylinder assembly 10. The hot runner heater 9 of the injection molding machine 1 is responsible for heating the mold and hydraulic cylinder assembly 10. Each injection molding machine 1 is connected to an injection molding machine PLC 2, and each injection molding machine PLC 2 is connected to the corresponding mold and hydraulic cylinder assembly 10 under the control of the injection molding machine 1, and is responsible for controlling its working status.

[0024] The following is based on Figure 1 The system structure is explained using any one of the injection molding machines 1 as an example. The other 5 injection molding machines 1 and related facilities are designed in the same way.

[0025] Injection molding machine 1 is equipped with a mold and hydraulic cylinder assembly 10. A hot runner heater 9 within injection molding machine 1 heats the mold and hydraulic cylinder assembly 10. Injection molding machine 1 is connected to an injection molding machine PLC 2. In case of a fault, a fault signal is reported to injection molding machine PLC 2. Injection molding machine PLC 2 is also connected to the mold and hydraulic cylinder assembly 10 to control its start and stop. Injection molding machine PLC 2 is also connected to an alarm, which includes, for example, a buzzer 12 and / or an indicator light 15, to trigger the alarm upon receiving a fault signal. Additionally, injection molding machine PLC 2 is connected to the main injection molding machine 11 of injection molding machine 1 for resetting and other operations after fault repair. The injection molding machine PLC2 connected to injection molding machine 1 is connected to a power failure protection control PLC4. Specifically, it is connected to the input terminal 5 of a power failure protection control PLC. A hot runner heater relay 8 is connected to the output terminal 6 of the power failure protection control PLC corresponding to the input terminal 5. The hot runner heater relay 8 is connected to the hot runner heater 9 of the injection molding machine 1. A time relay 7 is connected between the input terminal 5 and the output terminal 6 of the power failure protection control PLC. After receiving the level signal transmitted by the injection molding machine PLC2, it starts a countdown according to the configured timing time. After the countdown ends, it transmits a signal to the connected hot runner heater relay 8 to achieve a delayed shutdown of the hot runner heater 9 of the injection molding machine 1.

[0026] In addition, the time relay 7 is also connected to a time reset button 3. When triggered by the reset signal of the time reset button 3, the time relay 7 stops counting down and resets to its initial state. The injection molding machine PLC2 is connected to a delay time display 14. When the injection molding machine PLC2 sends a level signal to the power failure protection control PLC4, it simultaneously sends a level signal to the delay time display 14. Triggered by this level signal, the delay time display 14 displays a countdown according to the configured timing time, which is the same as the timing time configured for the time relay 7. The injection molding machine PLC2 is connected to the time reset button 3. When the time reset button 3 is pressed, it transmits a level signal to the injection molding machine PLC2. In response to this level signal, the injection molding machine PLC2 resets the alarm and the delay time display 14, stopping the alarm and countdown display.

[0027] The system works as follows: When injection molding machine 1 malfunctions, it sends a fault signal to injection molding machine PLC2. PLC2 then outputs a pause signal to the mold and cylinder assembly 10 to prevent material loss due to prolonged heating of the material feed pipe and hot runner in the mold, which could lead to plastic carbonization and decomposition. Simultaneously, PLC2 sends a jog fault signal (a low-level signal) to power failure protection control PLC4 and activates the alarm. Upon receiving the jog fault signal, power failure protection control PLC4 internally performs a self-locking mechanism, and time relay 7 begins a countdown according to the configured time, for example, three minutes. The delay time display 14 shows the three-minute countdown. If no operator addresses the fault and presses the time reset button 3 during the countdown, power failure protection control PLC4, after the three-minute countdown ends, controls the hot runner heater relay 8 to de-energize and stop heating the connected hot runner heater 9, preventing damage to the equipment from prolonged heating. If an operator presses the time reset button 3 during the countdown, the injection molding machine PLC2 will reset the alarm and delay time display 14, and the time relay 7 of the power failure protection control PLC4 will also reset. Additionally, if the operator performs a fault repair, the injection molding machine main unit 11 can be reset and the fault signal cleared via the injection molding machine PLC2.

[0028] Since the system centrally manages multiple injection molding machines 1, and each injection molding machine 1 has a corresponding alarm, time reset button 3, and delay time display 14, to facilitate operators in quickly locating which injection molding machine 1 has malfunctioned, the time reset button 3, alarm, and delay time display 14 corresponding to each injection molding machine 1 are combined into an alarm control unit, arranged in the same layout. This makes it easy to distinguish which alarm control unit issued the alarm, and the operator can simply operate the time reset button 3 in the same alarm control unit. For example, the alarm control units of each injection molding machine can be arranged horizontally at intervals on the control board 13. The control board 13 can be a mechanical mounting plate or a control panel in the form of a display screen. In the latter case, the time reset button 3 can be a virtual button on the control board 13, the delay time display 14 can be a sub-display screen on the control board 13, and the indicator light 15 can also be a sub-display screen on the control board 13.

[0029] To facilitate timely response by operators, the time reset button 3 and the delay time display 14 are arranged adjacent to each other in the alarm control unit. This allows operators to quickly locate the time reset button 3, eliminating the need to search for it when the countdown begins. For example, Figure 2 As shown, the time reset button 3, the delay time display 14, and the alarm are arranged in a top, middle, and bottom configuration. The alarm control units are arranged horizontally.

[0030] For each injection molding machine 1, the corresponding time relay 7 is as follows: Figure 1 As shown, all time relays 7 are arranged side-by-side in the power failure protection control PLC4. Additionally, the hot runner heater relays 8 corresponding to each injection molding machine 1 are arranged side-by-side.

[0031] Figure 1 The document shows six sets of time relays 7 and hot runner heater relays 8. In fact, more time relays 7 and hot runner heater relays 8 can be reserved so that when an injection molding machine 1 is added, it can be quickly connected to the system without expanding the power failure protection control PLC4.

[0032] In some specific implementations, a centralized control cabinet is configured for the system. The power failure protection control PLC4 and the relays 8 for each hot runner heater are all installed in the centralized control cabinet. The control board 13 is located on the cabinet door or other surface of the centralized control cabinet for easy alarm and operation.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centralized control system for heating protection in the faulty injection mold of a component, characterized in that, Includes at least one injection molding machine; for each injection molding machine, there are: The injection molding machine is matched and connected to a set of molds and hydraulic cylinders. The injection molding machine is connected to an injection molding machine control PLC, and the injection molding machine PLC is connected to the mold and hydraulic cylinder assembly. The injection molding machine PLC is connected to an input terminal of a power failure protection control PLC. The corresponding output terminal of the power failure protection control PLC is connected to a hot runner heater relay, and the hot runner heater relay is connected to the hot runner heater of the injection molding machine. A time relay is connected between the corresponding input and output terminals of the power failure protection control PLC. The time relay is connected to a time reset button, and the injection molding machine PLC is also connected to an alarm.

2. The centralized control system for heating protection against component injection mold failure as described in claim 1, characterized in that, The injection molding machine PLC is also connected to a delay time display, and the injection molding machine PLC is also connected to the time reset button.

3. The centralized control system for heating protection against component injection mold failure as described in claim 1, characterized in that, The alarm includes a buzzer and / or an indicator light.

4. The centralized control system for heating protection against component injection mold failure as described in claim 2, characterized in that, Each injection molding machine has a corresponding time reset button, alarm, and delay time display, which together form an alarm control unit. The alarm control units of each injection molding machine are arranged in the same layout.

5. The centralized control system for heating protection against component injection mold failure as described in claim 4, characterized in that, The alarm control units for each injection molding machine are arranged horizontally at intervals on the control panel.

6. The centralized control system for heating protection against component injection mold failure as described in claim 5, characterized in that, In the alarm control unit, the time reset button is arranged adjacent to the delay time display.

7. The centralized control system for heating protection against component injection mold failure as described in claim 6, characterized in that, In the alarm control unit, the time reset button, the delay time display, and the alarm are arranged in a top, middle, and bottom configuration, respectively.

8. The centralized control system for heating protection against component injection mold failure as described in claim 1, characterized in that, Each of the aforementioned time relays is arranged side by side within the power failure protection control PLC.

9. The centralized control system for heating protection against component injection mold failure as described in claim 8, characterized in that, The hot runner heater relays for each injection molding machine are arranged side by side.

10. The centralized control system for heating protection against component injection mold failure as described in claim 5, characterized in that, The power failure protection control PLC and each of the hot runner heater relays are installed in the centralized control cabinet, and the control board is set on the surface of the centralized control cabinet.

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