Injection molding machine material leakage detection device

Abstract

The utility model discloses a kind of injection molding machine material leakage detection equipment, belong to injection molding machine auxiliary equipment technical field, including the protective box for protecting internal components from dust, oil contamination pollution, the top of the protective box is equipped with the box door for sealing, the top of the box door is equipped with the door lock for avoiding misoperation to cause equipment failure or security risk, the top of the box door is equipped with self-locking switch for running circuit on-off, the inside of the protective box is equipped with switch power supply for providing safe, stable for low voltage components in equipment, the top of the box door is equipped with reset switch for removing alarm state, the equipment can find material leakage problem faster, effectively avoid material leakage package injection molding machine nozzle, heating ring and other components caused by equipment damage;While reducing the product short glue and other defective products due to insufficient feeding, reduce material waste, significantly improve product pass rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection molding machine auxiliary equipment, and in particular, it is an injection molding machine leakage detection device. Background Technology

[0002] Injection molding machines use the thrust of a screw to inject pre-plasticized molten plastic (i.e., viscous flow state) into a closed mold cavity. After solidification, the product is obtained. New sprue bushings fit perfectly with the injection molding machine nozzle, preventing material leakage during injection. However, over time, gaps may develop. During the feeding process, molten material may leak from these gaps, causing waste and contamination, or clogging the mold's runners, damaging the mold, and resulting in underfilled products. If the leaked plastic covers the injection molding machine nozzle or even overflows onto the heating coils, it will affect the normal operation of the equipment.

[0003] A search of Chinese patent documents (authorization announcement number CN221497003U) reveals that this utility model relates to the field of auxiliary equipment technology for injection molding machines, and particularly to a leakage detection device for injection molding machines. This utility model has a simple structure and is easy and quick to operate. It can detect leakage from the injection head, preventing leakage caused by wear and tear, thus reducing worker safety, lowering production costs, and improving safety. While the device meets basic usage requirements, molten material may continuously leak from the gaps, easily causing waste and pollution, or clogging the mold's flow channels, damaging the mold, and resulting in insufficient material in the product. If the leaked plastic covers the injection molding machine nozzle or even overflows onto the heating coil, it will affect the normal operation of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a material leakage detection device for injection molding machines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leakage detection device for injection molding machines, comprising a protective box for protecting internal components from dust and oil contamination, wherein the top of the protective box is equipped with a door for sealing; The top of the enclosure door is equipped with a door lock to prevent equipment failure or safety hazards caused by misoperation. The top of the enclosure door is also equipped with a self-locking switch for switching the circuit on and off. The interior of the protection enclosure is equipped with a safe and stable switching power supply for low-voltage components inside the equipment. The top of the enclosure door is also equipped with a reset switch for clearing the alarm status.

[0006] Preferably, the top of the box door is connected to an alarm for quickly alerting the operator of material leakage through sound and visual signals.

[0007] Preferably, the self-locking switch and the reset switch are connected to the switching power supply via power cables.

[0008] Preferably, the protective box is connected to a ventilation pipe on its side to ensure the orderly flow of compressed air within the equipment. The ventilation pipe is equipped with a high-pressure resistant rubber hose inside and an air blowing valve is installed at the end of the ventilation pipe.

[0009] Preferably, the outer periphery of the venting connection pipe is connected to an air source processor for providing a clean, constant-pressure air source to subsequent air circuit components.

[0010] Preferably, a pressure sensor for real-time monitoring of air pressure changes in the air circuit is installed on the side of the protective box, and a pressure gauge for convenient observation of air pressure status by the operator during equipment operation is connected to the side of the pressure sensor, and a solenoid valve for opening and closing the air circuit is connected to the side of the pressure sensor.

[0011] Preferably, the protective box has two sealing plugs connected to its side to enhance airtightness.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This injection molding machine leak detection equipment, thanks to its alarm structure, can detect abnormal changes in air pressure through a pressure sensor, quickly triggering an audible and visual alarm for timely response. Compared to the lag of traditional manual inspections, it can detect leaks much faster, effectively preventing damage to components such as the injection molding machine nozzle and heating coil caused by leaked material. It also reduces defective products such as those with insufficient material feed, minimizing material waste and significantly improving product yield.

[0013] This injection molding machine leakage detection equipment benefits from the structure of its air source processor. Through a protective enclosure and internal sealing design (such as a door and sealing plugs), the equipment provides a stable, dust- and oil-proof working environment for core components such as pressure sensors and solenoid valves. This reduces the probability of equipment failure caused by harsh workshop environments and extends the lifespan of components. Furthermore, the air source processor's purification and pressure stabilization of compressed air, combined with the precise monitoring of the pressure sensor, ensures reliable air pressure detection data, reduces false alarms or missed alarms, improves equipment stability and detection accuracy, and lowers manual maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This utility model Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram illustrating the working principle of this utility model.

[0016] Explanation of reference numerals in the attached figures: In the diagram: 1. Protection box; 101. Box door; 102. Door lock; 103. Self-locking switch; 104. Reset switch; 105. Alarm; 2. Pressure sensor; 201. Pressure gauge; 202. Solenoid valve; 203. Sealing plug; 3. Ventilation connection pipe; 301. Gas source processor. Detailed Implementation

[0017] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0018] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0019] like Figures 1 to 3 The injection molding machine leakage detection device shown includes a protective box 1 for protecting internal components from dust and oil contamination, and a box door 101 for sealing is installed on the top of the protective box 1; A door lock 102 is installed on the top of the door 101 to prevent equipment failure or safety hazards caused by misoperation. A self-locking switch 103 for switching the operating circuit is also installed on the top of the door 101. The interior of the protection box 1 is equipped with a safe and stable switching power supply for low-voltage components inside the equipment. A reset switch 104 for clearing the alarm state is installed on the top of the door 101. Under normal conditions: when there is no material leakage in the injection molding machine, the air path of the blowing valve is unobstructed, and the air pressure is stable below the set threshold (e.g., 0.8MPa). The pressure sensor 2 converts the air pressure signal into an analog electrical signal (e.g., 4-20mA). At this time, the signal has not reached the threshold, the solenoid valve 202 remains open, the air path is continuously open, and the equipment operates normally. The sealing plug 203 of the protection box 1 enhances the airtightness of the connection between the pressure sensor 2 and the air path, ensuring accurate pressure detection. During the material leakage triggering stage, if the injection molding machine leaks material, the molten plastic will block the blowing valve, causing the air pressure in the ventilation connection pipe 3 to rise sharply. When pressure sensor 2 detects that the air pressure has reached or exceeded the set threshold, its output analog signal triggers subsequent circuit actions. During the alarm response phase, after signal processing, alarm 105 on the door 101 is activated, quickly alerting the operator to material leakage through sound (such as a buzzer) and visual (such as a warning light) signals. Simultaneously, solenoid valve 202 is de-energized and closed, cutting off the air path to prevent continued abnormal air pressure. After receiving the alarm, the operator closes the self-locking switch 103 to cut off the power, unlocks the door lock 102 to open the door 101, cleans the leaked material from the air blowing valve, checks the sealing of the air connection pipe 3 and the sealing plug 203 to ensure the air path is unobstructed. After processing, the operator presses the reset switch 104 on the door 101, and the signal is transmitted to the switching power supply and control circuit via the power cable, clearing the alarm status of alarm 105. Pressing the self-locking switch 103 again restores power to the equipment, solenoid valve 202 reopens, the air path is reconnected, pressure sensor 2 and pressure gauge 201 resume monitoring, and the equipment enters the next detection cycle.

[0020] An alarm 105 is connected to the top of the door 101 to quickly alert the operator of material leakage via sound and visual signals. A self-locking switch 103 and a reset switch 104 are connected to a switching power supply via power cables. Pressing the self-locking switch 103 on the door 101 activates the circuit. The switching power supply inside the protection box 1 receives AC power and converts it to stable DC power (e.g., 24V) to power low-voltage components such as the pressure sensor 2, solenoid valve 202, and alarm 105.

[0021] The protective box 1 has a ventilation connection pipe 3 connected to its side to ensure the orderly flow of compressed air within the equipment. A high-pressure resistant hose is installed inside the ventilation connection pipe 3, and an air blowing valve is installed at its end. An air source processor 301 is connected to the outer periphery of the ventilation connection pipe 3 to provide a clean, constant-pressure air source for subsequent air circuit components. External compressed air enters the air source processor 301 through the ventilation connection pipe 3 (with the internal high-pressure resistant hose ensuring stable air pressure transmission). After filtration (removing dust and oil) and pressure stabilization, a clean, constant-pressure air source is formed. At this time, the solenoid valve 202 is energized and opened, and compressed air is delivered to the air blowing valve at the end through the ventilation connection pipe 3, completing the initialization of the air circuit and maintaining its unobstructed flow.

[0022] A pressure sensor 2 is installed on the side of the protective box 1 to monitor the air pressure changes in the air circuit in real time. A pressure gauge 201 is connected to the side of the pressure sensor 2 for easy observation of the air pressure status by the operator during equipment operation. A solenoid valve 202 for opening and closing the air circuit is also connected to the side of the pressure sensor 2. Two sealing plugs 203 are connected to the side of the protective box 1 to enhance airtightness. The pressure sensor 2 on the side of the protective box 1 monitors the air pressure changes in the air circuit in real time, and the pressure gauge 201 connected to its side synchronously displays the real-time air pressure value, allowing the operator to easily observe whether the initial state is normal. The schematic diagram of this injection molding machine leakage detection equipment system is as follows: [Self-locking switch] → [Switching power supply] → [Gas source processor] → [Solenoid valve] →[Blow valve] │ ├─[Pressure Sensor]→[Alarm] └─[Reset Switch (NO)]→(Control Circuit).

[0023] Working principle When using this injection molding machine leakage detection equipment, first press the self-locking switch 103 to activate the power supply in the protection box 1, which powers the pressure sensor 2, solenoid valve 202, etc. Compressed air enters the air source processor 301 for purification and pressure stabilization via the air connection pipe 3 (containing a high-pressure resistant hose), and then is sent to the air blowing valve through the solenoid valve 202. The pressure sensor 2 monitors the air pressure in the air circuit in real time, and the pressure gauge 201 displays it synchronously. When there is no leakage, the air pressure is normal, the equipment operates stably, and the sealing plug 203 ensures airtightness. When leakage blocks the air blowing valve, the air pressure rises sharply, the pressure sensor 2 triggers a signal, the alarm 105 sounds and sees an audible and visual alarm, and the solenoid valve 202 closes the air circuit. After handling the leakage, press the reset switch 104 to clear the alarm, and the equipment restarts for detection.

[0024] It should be noted that in this article, relational terms such as one and two are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[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. A material leakage detection device for injection molding machines, comprising a protective housing (1) for protecting internal components from dust and oil contamination, characterized in that: The top of the protective box (1) is equipped with a door (101) for sealing. The top of the enclosure door (101) is equipped with a door lock (102) to prevent equipment failure or safety hazards caused by misoperation. The top of the enclosure door (101) is equipped with a self-locking switch (103) for switching the circuit on and off. The inside of the protection box (1) is equipped with a safe and stable switching power supply for low-voltage components inside the equipment. The top of the enclosure door (101) is equipped with a reset switch (104) for clearing the alarm status.

2. The injection molding machine leakage detection device according to claim 1, characterized in that: The top of the box door (101) is connected to an alarm (105) for quickly alerting the operator of material leakage through sound and visual signals.

3. The injection molding machine leakage detection device according to claim 1, characterized in that: The self-locking switch (103) and the reset switch (104) are connected to the switching power supply via power cables.

4. The injection molding machine leakage detection device according to claim 1, characterized in that: The protective box (1) is connected to a ventilation connection pipe (3) to ensure that compressed air flows in an orderly manner within the equipment. A high-pressure resistant rubber hose is installed inside the ventilation connection pipe (3), and an air blowing valve is installed at the end of the ventilation connection pipe (3).

5. The injection molding machine leakage detection device according to claim 4, characterized in that: The outer periphery of the ventilation connection pipe (3) is connected to an air source processor (301) for providing a clean, constant-pressure air source for subsequent air circuit components.

6. The injection molding machine leakage detection device according to claim 1, characterized in that: The protective box (1) is equipped with a pressure sensor (2) for real-time monitoring of air pressure changes in the air circuit. The side of the pressure sensor (2) is connected to a pressure gauge (201) for convenient operation of the equipment to observe the air pressure status. The side of the pressure sensor (2) is also connected to a solenoid valve (202) for opening and closing the air circuit.

7. The injection molding machine leakage detection device according to claim 1, characterized in that: The protective box (1) has two sealing plugs (203) connected to its side to enhance airtightness.

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