Injection molding machine

Abstract

The utility model relates to an injection molding machine which comprises an injection molding machine body arranged on a rack and an electrical control unit used for controlling the action execution of each unit of the injection molding machine body, a protective door moving transversely is arranged on the front side of the rack, and a photoelectric protection device electrically connected with the electrical control unit is further arranged on the rack. The photoelectric protection device comprises a plurality of light emitters, a plurality of light receivers and a control unit, the light emitters are longitudinally arranged on the right side wall of the protection door and used for emitting infrared light, the light receivers are longitudinally arranged on stand columns on the front side of the rack, and the control unit analyzes received light signals, converts the light signals into electric signals and transmits the electric signals to the electrical control unit; therefore, the action execution of each unit in the injection molding machine body is controlled. According to the utility model, the protective door and the photoelectric protection device are arranged on the rack, and once a light signal is detected to be shielded, a converted electric signal is transmitted to the electric control unit to prevent the injection molding machine from executing actions, so that double protection on an operator is realized, the safety of the device is improved, and the device is convenient to install and maintain.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to an injection molding machine. Background Technology

[0002] Currently, with the development of plastics technology and the widespread application of engineering plastics, plastic products are increasingly appearing in people's production and daily lives. Consequently, the requirements for the manufacturing technology and precision of injection molding equipment are becoming increasingly stringent, placing higher demands on injection molding machines. Because injection molding machines generate significant clamping forces during operation, serious injury can occur if an operator's hand or body part accidentally enters the mold area.

[0003] For example, Chinese utility model patent ZL202021680915.9 (publication number CN213107866U), entitled "An Opening and Closing Protective Door for an Injection Molding Machine," discloses such a protective door. This door includes a protective door panel, a guide plate, a support rod, a fixed sleeve rod, and a push plate. A protective rod is movably connected to the support rod. When the protective door is closed, pushing the protective door panel until the protective rod moves into the fixed frame allows the protective rod, under the action of a rubber rod, to dampen the door panel, thereby improving its stability. This protective door panel can prevent operators from entering dangerous areas and also avoid injury from splashing molten plastic at high temperatures. However, if the protective door panel malfunctions and opens unexpectedly, or if an operator opens the protective panel while removing a mold and the injection molding machine is not stopped in time, an accident could occur if the operator enters the dangerous area.

[0004] Therefore, further improvements to the structure of the injection molding machine are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an injection molding machine that provides dual protection for operators and has high safety, in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the injection molding machine includes:

[0007] The main body of the injection molding machine is mounted on the frame;

[0008] An electrical control unit, mounted on the frame, is used to control the actions of each unit in the injection molding machine body;

[0009] The feature is that: a protective door capable of moving laterally is provided on the front side of the frame; the frame is also equipped with a photoelectric protection device electrically connected to the electrical control unit; the photoelectric protection device includes:

[0010] Multiple light emitters are integrated longitudinally into a unit component, located on the right side wall of the protective door, and are used to emit infrared light.

[0011] Multiple optical receivers are integrated longitudinally into another unit and mounted on a column on the front side of the frame. The optical receivers can receive infrared light emitted by the optical transmitter.

[0012] The control unit is used to receive the light signals from the light transmitter and the light receiver, analyze and convert them into electrical signals, and transmit them to the electrical control unit, thereby controlling the operation of each unit in the injection molding machine body.

[0013] To avoid detection blind spots, preferably, the light emitter and light receiver are arranged in parallel and symmetrically, with each unit embedded in the side wall of the protective door or the column on the front side of the frame. This parallel and symmetrical arrangement ensures that each beam of infrared light emitted from the light emitter is precisely aligned with the corresponding receiving unit of the light receiver, thus avoiding safety hazards caused by detection blind spots. Furthermore, the embedding of the unit does not affect the opening and closing of the protective door.

[0014] To achieve dual protection, preferably, the signal output terminal of the control unit is connected to both the alarm device and the electrical control unit. The control unit's signal is simultaneously transmitted to both the alarm device and the electrical control unit. The electrical control unit prevents the mold clamping unit, injection unit, and hydraulic unit within the injection molding machine from performing further actions. Simultaneously, upon receiving the electrical signal, the alarm device alerts the operator to stay away via audible and visual alarms, thus providing dual protection.

[0015] For ease of observation and operation, preferably, the frame is equipped with a protective cover, and the side wall of the protective cover has an openable and closable operating window. A lubrication pump is installed in the cavity of the frame, and the lubrication pump is adjacent to the operating window. This allows the operator to observe the working status of the lubrication pump through the door and make timely judgments and reactions. If the oil tank is low on oil, oil can be directly added to the lubrication pump through the operating window.

[0016] To enhance safety, the protective cover is equipped with a connecting part, on which a door for closing the operating window is mounted. The door is connected to the protective cover via a locking mechanism. During injection molding machine operation, high-temperature molten plastic splashes from the operating window. The door effectively blocks these splashes, protecting the operator's safety. Furthermore, the door effectively isolates the operator from moving parts, preventing physical contact. The locking mechanism prevents the door from accidentally opening due to machine vibration, ensuring operator safety.

[0017] To facilitate the supply of lubricating oil, preferably, the lubrication pump includes an oil tank and an oil supply pump. A mold-closing unit is mounted on the frame, and the oil supply pump supplies lubricating oil from the oil tank to the mold-closing unit via oil pipes. Under the action of the oil supply pump, the lubricating oil in the oil tank can be supplied to the mold-closing unit along the oil pipes, thereby preventing wear on the components of the mold-closing unit.

[0018] For ease of operation, preferably, the oil tank is equipped with an oil inlet for filling and a flow meter for displaying the tank's status. The operator can directly read the flow meter reading through the door to determine the lubricating oil level in the tank. If the tank is low on oil, the operator can open the door, open the oil inlet, and fill the tank with lubricating oil.

[0019] To isolate impurities, preferably, the mold clamping unit includes a guide rail extending along the length of the frame, a guide sleeve is provided on the guide rail, and a dustproof ring is provided between the guide rail and the guide sleeve. The guide rail plays an important supporting and guiding role in the injection molding machine. The dustproof ring between the guide rail and the guide sleeve serves two purposes: firstly, it blocks external impurities, preventing impurity particles from scratching or even jamming the guide rail; secondly, it prevents the lubricating oil on the guide rail from being contaminated by impurity particles.

[0020] Compared with the prior art, the advantages of this utility model are as follows: the protective door can protect the operator, and by installing a photoelectric protection device on the frame of the injection molding machine, the photoelectric protection device includes a light emitter that can emit infrared light and a light reflector that can receive infrared light, as well as a control unit that can analyze and convert the light signal, it can realize that once the light signal is detected to be blocked, the converted electrical signal will be transmitted to the electrical control unit and control each module in the injection molding machine to stop the next action, thereby further realizing protection, improving the safety of the injection molding machine, and facilitating installation and maintenance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is an exploded structural diagram of an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram illustrating the working principle of the photoelectric protection device in this embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the light transmitter and light receiver in the embodiment of this utility model;

[0025] Figure 5 This is a front view of an embodiment of the present utility model;

[0026] Figure 6 This is a rear view of an embodiment of the present utility model.

[0027] In the diagram: 1. Injection molding machine body; 2. Frame; 21. Protective door; 3. Electrical control unit; 4. Photoelectric protection device; 41. Control unit; 42. Light emitter; 43. Light receiver; 44. Alarm device; 5. Protective cover; 51. Operating window; 6. Lubrication pump; 61. Oil tank; 611. Oil inlet; 62. Oil supply pump; 63. Flow meter; 7. Connecting part; 8. Door body; 9. Locking element; 10. Mold closing unit; 101. Guide rail; 102. Guide sleeve. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 6 The diagram shows the preferred embodiment of this utility model. The injection molding machine includes an injection molding machine body 1 mounted on a frame 2 and an electrical control unit 3 for controlling the actions of modules such as the mold clamping unit 10, injection unit, and hydraulic unit within the injection molding machine body 1. A protective door 21 capable of moving laterally is located on the front side of the frame 2. A photoelectric protection device 4 electrically connected to the electrical control unit 3 is also mounted on the frame 2. This photoelectric protection device 4 includes multiple light emitters 42 mounted on the right side wall of the protective door 21 for emitting infrared light, multiple light receivers 43 mounted on columns on the front side of the frame 2 for receiving infrared light emitted by the light emitters 42, and a control unit 41. The light emitters 42 are integrated longitudinally within a single unit, while the light receivers 43 are integrated longitudinally within another single unit. The control unit 41 receives the light signals from the light emitters 42 and light receivers 43, analyzes them, and converts them into electrical signals, which are then transmitted to the electrical control unit 3 to control the actions of each unit within the injection molding machine body 1.

[0030] refer to Figure 2 and Figure 4The light emitter 42 and light receiver 43 are arranged in parallel and symmetrically. Each unit is correspondingly embedded in the side wall of the protective door 21 or the column on the front side of the frame 2. The main purpose is to ensure that each beam of infrared light emitted from the light emitter 42 is precisely aligned with the corresponding receiving unit of the light receiver 43, thereby avoiding safety hazards caused by blind spots in detection. In addition, the embedded method of the unit can avoid affecting the opening and closing of the protective door. The signal output terminal of the control unit 41 is connected to the alarm device 44 and the electrical control unit 3. The signal of the control unit 41 is transmitted to the alarm device 44 and the electrical control unit 3 at the same time. The electrical control unit 3 will prevent the mold closing unit 10 and other modules in the injection molding machine body 1 from performing the next execution action. At the same time, after receiving the electrical signal, the alarm device 44 will warn the operator not to approach through an audible and visual alarm, thereby playing a dual protection role.

[0031] Conventional injection molding machines typically house the lubrication pump 6 inside the mold clamping unit 10. In this case, operators cannot readily monitor the lubrication pump 6's operational status, and lubrication is also somewhat inconvenient. (Refer to...) Figure 1 and Figure 5 In this embodiment, a protective cover 5 is provided on the frame 2, and an openable and closable operation window 51 is provided on the side wall of the protective cover 5. A lubrication pump 6 is provided in the cavity of the frame 2, and the lubrication pump 6 is adjacent to the operation window 51. The operator can observe the working status of the lubrication pump 6 through the door 8 and make timely judgments and reactions. Once the oil tank 61 is in a state of oil shortage, oil can be directly injected into the lubrication pump 6 through the operation window 51. Meanwhile, the protective cover 5 is provided with a connecting part 7. In this embodiment, the connecting part 7 is preferably a hinge for easy installation. The connecting part 7 is provided with a door 8 for closing the operating window 51. At this time, the door 8 and the connecting part 7 are hinged. The door 8 and the protective cover 5 are connected by a locking member 9. During the operation of the injection molding machine, molten plastic will splash from the operating window 51. By setting the door 8 in the operating window 51, the high-temperature splashes can be effectively blocked, thereby protecting the safety of the operator. Secondly, by setting the door 8, the operator can be effectively isolated from the moving parts, thereby avoiding physical contact. The locking member 9 can prevent the door 8 from being accidentally opened due to the vibration of the injection molding machine, thereby ensuring the safety of the operator.

[0032] refer to Figure 5The lubrication pump 6 includes an oil tank 61 and an oil supply pump 62. A mold closing unit 10 is installed on the frame 2. Under the action of the oil supply pump 62, the lubricating oil in the oil tank 61 can be supplied to the mold closing unit 10 along the oil pipe, thereby avoiding wear on the components of the mold closing unit 10. The oil tank 61 is equipped with an oil inlet 611 for filling with oil and a flow meter 63 for displaying the status of the oil tank 61. The operator can directly read the reading on the flow meter 63 through the door 8 to judge the lubricating oil status in the oil tank 61. Once the oil tank 61 is in a state of insufficient oil, the operator can open the door 8 and open the oil inlet 611 to fill the oil tank 61 with lubricating oil.

[0033] refer to Figure 6 The mold clamping unit 10 includes a guide rail 101 extending along the length of the frame 2. The guide rail 101 plays an important supporting and guiding role in the injection molding machine. A guide sleeve 102 is provided on the guide rail 101, and a dustproof ring is provided between the guide rail 101 and the guide sleeve 102. The dustproof ring can block external impurities, thereby preventing impurity particles from scratching or even jamming the guide rail 101, and can also prevent the lubricating oil on the guide rail 101 from being contaminated by impurity particles.

[0034] The working principle of the injection molding machine in this utility model is as follows: When the injection molding machine is running, the protective door 21 is closed. The protective door 21 can block the high-temperature molten plastic splashed during the operation of the injection molding machine, thereby protecting the operator. When the operator needs to remove the mold, the protective door 21 needs to be opened and the injection molding machine needs to be stopped. If the machine is not stopped in time, once the operator's hand or other parts enter the injection molding machine, the infrared light emitted by the light emitter 42 on the right side wall of the protective door 21 will be blocked, so that the light receiver 43 cannot receive the infrared light. The control unit 41 converts the light signal into an electrical signal and transmits it to the alarm device 44. At this time, the alarm device 44 will sound and light an alarm to prompt the operator to retreat. At the same time, the electrical signal is transmitted to the electrical control unit 3 to shut down the injection molding machine and prevent it from performing the next action.

Claims

1. An injection molding machine, comprising: The injection molding machine body (1) is mounted on the frame (2); An electrical control unit (3) is installed on the frame (2) and is used to control the operation of each unit in the injection molding machine body (1); Its features are: The front side of the frame (2) is provided with a protective door (21) that can move laterally. The frame (2) is also provided with a photoelectric protection device (4) that is electrically connected to the electrical control unit (3). The photoelectric protection device (4) includes: Multiple light emitters (42) are integrated longitudinally in a unit and are disposed on the right side wall of the protective door (21), and can be used to emit infrared light; Multiple optical receivers (43) are integrated longitudinally on another unit and mounted on a column on the front side of the frame (2). The optical receivers (43) can receive infrared light emitted by the optical transmitter (42). The control unit (41) is used to receive the light signals from the light transmitter (42) and the light receiver (43), analyze them, convert them into electrical signals, and transmit them to the electrical control unit (3) to control the operation of each unit in the injection molding machine body (1).

2. The injection molding machine according to claim 1, characterized in that: The light transmitter (42) and light receiver (43) are arranged in parallel and symmetrically, and each unit is correspondingly embedded in the side wall of the protective door (21) or the column on the front side of the frame (2).

3. The injection molding machine according to claim 2, characterized in that: The output terminal of the control unit (41) is connected to the alarm device (44) and the electrical control unit (3).

4. The injection molding machine according to claim 1, characterized in that: A protective cover (5) is provided on the frame (2), and an openable and closable operating window (51) is provided on the side wall of the protective cover (5). A lubrication pump (6) is provided in the cavity of the frame (2), and the lubrication pump (6) is adjacent to the operating window (51).

5. The injection molding machine according to claim 4, characterized in that: The protective cover (5) is provided with a connecting part (7), and the connecting part (7) is provided with a door (8) for closing the operation window (51). The door (8) is connected to the protective cover (5) by a locking member (9).

6. The injection molding machine according to claim 4, characterized in that: The lubrication pump (6) includes an oil tank (61) and an oil supply pump (62). A mold closing unit (10) is provided on the frame (2). The oil supply pump (62) can supply the lubricating oil in the oil tank (61) to the mold closing unit (10) along the oil pipe.

7. The injection molding machine according to claim 6, characterized in that: The oil tank (61) is provided with an oil inlet (611) for filling oil and a flow meter (63) for displaying the status of the oil tank (61).

8. The injection molding machine according to claim 6 or 7, characterized in that: The mold-closing unit (10) includes a guide rail (101) extending along the length of the frame (2), a guide sleeve (102) is provided on the guide rail (101), and a dustproof ring is provided between the guide rail (101) and the guide sleeve (102).

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