A centrifugal film machine with a safety gate

Abstract

The utility model discloses a centrifugal film machine with safety door belongs to centrifugal film machine field, has solved the problem that the door body is opened because of the misoperation, and the technical scheme of solving this problem mainly includes the frame body, is equipped with controller, drive motor, the drum rotating by drive motor drive in frame body, and the injection film mechanism and heating mechanism, is equipped with first sensor on the drum, and the front side of frame body is provided with the door body, is equipped with the locking piece for locking the door body on the frame body, and the side of drum towards the door body forms the entrance, and heating mechanism sliding installation is in the door body, is equipped with second sensor for detecting the distance between heating mechanism and the door body on the door body, and the controller is equipped with the rotating speed threshold value and distance threshold value, and the locking piece only when the rotating speed of drum is lower than the rotating speed threshold value and the distance between heating mechanism and the door body is less than the distance threshold value, releases the locking of the door body. The utility model mainly is used to ensure that the door body can only open when the rotating speed of drum is lower and heating mechanism is separated from the drum.

Description

Technical Field

[0001] This utility model demonstrates a centrifugal film machine with a safety door, belonging to the technical field of centrifugal film machines. Background Technology

[0002] Centrifugal film-making machines are commonly used film-forming machines. They typically include a drive motor, a rotating drum driven by the motor, a liquid injection mechanism for injecting liquid into the drum, and a heating mechanism. During film formation, the liquid injection mechanism injects film solution into the drum, the drive motor drives the drum to rotate, and the film solution is dispersed onto the inner wall of the drum under centrifugal force. The heating mechanism then heats the film solution, causing it to solidify and form a film. Existing centrifugal film-making machines are usually installed in a frame with a door. After film formation is complete, the door is opened to remove the film from the drum. However, in actual use, the door can be accidentally opened during film formation, posing a significant safety hazard due to the high-speed rotation of the drum. Utility Model Content

[0003] The purpose of this invention is to solve the problem of the door being opened due to misoperation. To this end, a centrifugal film machine with a safety door is provided. Through a first sensor and a second sensor, it is ensured that the door can only be opened when the drum speed is low and the heating mechanism is disengaged from the drum.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0005] A centrifugal film machine with a safety door includes a frame, a controller, a drive motor, a drum driven by the drive motor, and a heating mechanism. The controller is electrically connected to a first sensor and a second sensor. The first sensor is used to acquire the output power of the drive motor. A door is rotatably mounted on the front side of the frame. The frame is equipped with a locking element for locking the door. The controller controls the locking element to lock or unlock the door. The side of the drum facing the door forms an entrance. The heating mechanism is slidably mounted on the door and slides along the drum axis to enter or move away from the drum. The door is equipped with a second sensor for acquiring the distance between the heating mechanism and the door. The controller has a first threshold and a second threshold. The locking element releases the lock on the door only when the output power of the drive motor is lower than the first threshold and the distance between the heating mechanism and the door is less than the second threshold.

[0006] The beneficial effects of using this utility model are:

[0007] In this invention, the frame is locked to the door by a locking mechanism. A first sensor acquires the output power of the drive motor, and a second sensor acquires the distance between the heating mechanism and the door. The locking mechanism engages only when the output power of the drive motor is below a first threshold and the distance between the heating mechanism and the door is less than a second threshold, allowing the door to open normally. When the output power acquired by the first sensor is greater than the first threshold, it indicates that the motor is running, meaning the roller is rotating at high speed. In this case, the controller locks the door to prevent the user from opening the door arbitrarily and being injured by the high-speed rotating roller, thus improving the safety of the film-making machine. When the distance between the heating mechanism and the door acquired by the second sensor is greater than the second threshold, it indicates that the heating mechanism is inside the roller. Since the heating mechanism is mounted on the door, it rotates with the door during rotation. If the heating mechanism is still inside the roller, it will collide with it, potentially causing damage. Therefore, locking the door in this situation protects the heating mechanism and the roller, helping to extend the service life of the heating mechanism.

[0008] Preferably, the heating mechanism includes a heater and a movable component. The movable component is installed on the door body and drives the heater to slide along the axial direction of the roller, so as to allow the heater to extend into or away from the roller.

[0009] Preferably, the movable component includes a telescopic rod and a first actuator. The first actuator is fixed to the door body, and the heater is fixed to the telescopic rod. The first actuator drives the telescopic rod to extend and retract along the axial direction of the roller. Using the aforementioned technical solution, the telescopic rod effectively locks the space occupied by the movable component, reducing its volume. Furthermore, the cooperation between the first actuator and the telescopic rod allows for more precise and reliable movement of the heating mechanism.

[0010] Preferably, the movable component includes a pull rod and a handle. One end of the pull rod is connected to the heater, and the other end passes through the door and is connected to the handle. The handle drives the heater to slide along the axial direction of the roller via the pull rod. Using the aforementioned technical solution, the pull rod can be pulled directly by the handle, eliminating the need for electricity or pneumatic power. This allows the heater to be driven away from the roller even in the event of a power outage or power failure. Furthermore, eliminating the need for electric or pneumatic drives significantly reduces the cost of the film-making machine.

[0011] Preferably, the heater includes a plurality of circumferentially distributed heating elements and corresponding reflectors. The heating elements are concentrically distributed with the drum, and the reflectors have openings facing the inner wall of the drum. The heating elements are positioned between the reflectors and the inner wall of the drum, and the reflectors reflect a portion of the light emitted by the heating elements back to the inner wall of the drum. Using the aforementioned technical solution, the reflectors can reflect the heat scattered by the heating elements back to the inner wall of the drum, thereby significantly improving the heating efficiency of the heating elements on the inner wall of the drum.

[0012] Preferably, the locking element includes a solenoid valve installed on the frame, and the controller controls the solenoid valve to be energized or de-energized. The door is provided with a metal part corresponding to the solenoid valve. When the solenoid valve is energized, it attracts the metal part to lock the door. The controller controls the solenoid valve to be de-energized only when the rotational speed of the roller is lower than a first threshold and the distance between the heating mechanism and the door is less than a second threshold, so as to unlock the door.

[0013] Preferably, when the heating mechanism slides to the end near the door, the heating mechanism is completely disengaged from the roller inlet, and there is a gap between the heating mechanism and the roller.

[0014] Preferably, the centrifugal film machine further includes a liquid injection mechanism, which includes a liquid injector and a liquid injection driver that drives the liquid injector. The liquid injector is parallel to the axial direction of the drum, and the liquid injection driver drives the liquid injector to slide along the axial direction of the drum so that the liquid injector enters or leaves the drum.

[0015] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the centrifugal film machine with a safety door according to this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the centrifugal film machine with a safety door according to this utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the structure of the roller, heating mechanism and liquid injection mechanism in the centrifugal film machine with a safety door of this utility model;

[0020] Figure 4 This is a cross-sectional view of the centrifugal film machine with a safety door according to this utility model;

[0021] Figure 5 This is a schematic diagram of the heating mechanism and liquid injection mechanism in the centrifugal film machine with a safety door according to this utility model.

[0022] Reference numerals: 1. Frame; 11. Door; 12. Handle; 13. Metal part; 14. Solenoid valve; 15. Fixing seat; 151. Bearing; 2. Drive motor; 3. Roller; 31. Rotating shaft; 32. Mounting hole; 4. Liquid injection mechanism; 41. Liquid injection driver; 42. Liquid injector; 43. Connecting plate; 5. Heating mechanism; 511. Heating element; 512. Reflector; 52. Fixing plate; 53. Pull rod; 54. Handle; 541. Connecting seat. Detailed Implementation

[0023] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise expressly defined.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] like Figures 1 to 5As shown in the figure, this embodiment demonstrates a centrifugal film machine with a safety door, including a frame 1. The frame 1 contains a controller, a drive motor 2, a drum 3 driven by the drive motor 2, and a heating mechanism 5. The controller is electrically connected to a first sensor and a second sensor. The first sensor is used to obtain the output power of the drive motor 2. A door 11 is rotatably disposed on the front side of the frame 1. The frame 1 is provided with a locking member for locking the door 11. The controller controls the locking member to lock or unlock the door 11. The drum 3 forms an entrance on the side facing the door 11. The heating mechanism 5 is slidably mounted on the door 11. The heating mechanism 5 slides along the axial direction of the drum 3 to enter the drum 3 or move away from the drum 3. The door 11 is provided with a second sensor for obtaining the distance between the heating mechanism 5 and the door 11. The controller has a first threshold and a second threshold. The locking member releases the lock on the door 11 only when the output power of the drive motor 2 is lower than the first threshold and the distance between the heating mechanism 5 and the door 11 is less than the second threshold.

[0028] In this embodiment, the frame 1 locks the door 11 using a locking mechanism. Simultaneously, a first sensor acquires the output power of the drive motor 2, and a second sensor acquires the distance between the heating mechanism 5 and the door 11. The locking mechanism will only engage when the output power of the drive motor 2 is below a first threshold and the distance between the heating mechanism 5 and the door 11 is less than a second threshold, allowing the door 11 to open normally. When the output power acquired by the first sensor is greater than the first threshold, it indicates that the motor is running, meaning the roller 3 is rotating at high speed. In this case, the controller controls the locking mechanism to lock the door 11, preventing the user from arbitrarily opening the door 11. 1. Damage caused by the high-speed rotating roller 3 helps improve the safety of the film-making machine. When the distance between the heating mechanism 5 and the door 11 obtained by the second sensor is greater than the second threshold, it means that the heating mechanism 5 is inside the roller 3. Since the heating mechanism 5 is installed on the door 11, the heating mechanism 5 will rotate with the door 11 during the rotation. If the heating mechanism 5 is still inside the roller 3, the heating mechanism 5 will collide with the roller 3, which will cause the heating mechanism 5 and the roller 3 to be damaged due to the collision. Therefore, locking the door 11 in this case can protect the heating mechanism 5 and the roller 3 and help extend the service life of the heating mechanism 5.

[0029] like Figure 2 and Figure 3 As shown, the centrifugal film machine in this embodiment includes a rectangular frame 1. The drive motor 2, roller 3, heating mechanism 5 and liquid injection mechanism 4 are all installed in the internal space of the frame 1. A door 11 is rotatably connected to the front side of the frame 1. The frame 1 is provided with a locking member for locking the door 11. The locking member is electrically connected to the controller. The controller controls the locking member to lock or unlock the door 11 so as to realize the closing and opening of the door 11.

[0030] In this embodiment, the output shaft of the drive motor 2 is connected to a rotating shaft 31. The rotating shaft 31 is placed horizontally, and the central axis of the roller 3 coincides with the rotating shaft 31, that is, the rotating shaft 31 and the roller 3 are coaxially arranged. The roller 3 has a mounting hole 32 in the middle, and the rotating shaft 31 is anti-rotationally engaged with the mounting hole 32 to achieve a fixed connection between the rotating shaft 31 and the roller 3. The drive motor 2 drives the roller 3 to rotate through the rotating shaft 31. An opening is formed on the side of the roller 3 away from the rotating shaft 31 to allow the heating mechanism 5 and the liquid injection mechanism 4 to enter or leave the roller 3.

[0031] In this embodiment, the first sensor is installed on the drive motor 2 and is used to obtain the output power of the drive motor 2. The first sensor is electrically connected to the controller. Since the output shaft of the drive motor 2 is connected to the rotating shaft 31, the rotating shaft 31 rotates synchronously with the roller 3. That is, when the output power of the drive motor 2 is large, the roller 3 is in a high-speed rotating state. When the output power of the drive motor 2 is zero, it means that the roller 3 stops rotating and the output power obtained by the first sensor is less than the first threshold. When the output power obtained by the first sensor is greater than the first threshold, it means that the roller 3 is still in a high-speed rotating state.

[0032] like Figure 2 and Figure 5 As shown, the heating mechanism 5 in this embodiment includes a heater and a movable component that drives the heater to slide along the axial direction of the roller 3. The heater includes a fixed plate 52, a plurality of heating tubes 511 fixed to the fixed plate 52, and a reflector 512. The number of heating tubes 511 is the same as the number of reflectors 512. The heating tubes 511 and the reflectors 512 correspond one-to-one and are distributed along the circumference of the roller 3. The reflector 512 forms an opening on the side facing the inner wall of the roller 3. The heating tubes 511 are located between the reflector 512 and the inner wall of the roller 3. After the heating tubes 511 are activated, they emit light. Part of the light directly irradiates the inner wall of the roller 3, and another part irradiates the reflector. The reflector emits the part of the light onto the inner wall of the roller 3, thereby increasing the amount of light irradiated by the heating tubes 511 onto the inner wall of the roller 3. This can accelerate the heating efficiency of the heater on the inner wall of the roller 3 and significantly improve the film-making efficiency.

[0033] In this embodiment, the movable component is installed on the door 11. The movable component includes a pull rod 53 connected to a fixed plate 52. One end of the pull rod 53 passes through the door 11 and is connected to a connecting seat 541. A handle 54 is installed on the connecting seat 541. During use, the user drives the heater to slide in the axial direction by using the handle 54, thereby enabling the heater to enter or leave the roller 3. A second sensor is installed on the inner side of the door 11, facing the fixed plate 52 of the heater, and is used to obtain the distance between the inner side of the door 11 and the fixed plate 52. When the heating mechanism 5 needs to heat the inner side of the roller 3, the user pushes the heater by using the handle 54. The heater slides along the axial direction of the roller 3 so that it can extend into the roller 3. Then the heater is activated, and the heating tube 511 emits light. Some of the light directly shines on the inner wall of the roller 3, and some of the light is reflected to the inner wall of the roller 3 through the emitting cover. The heat generated by the light heats the film liquid to fix the film liquid. After the heating mechanism 5 has finished heating, the user pulls the heater away from the roller 3 by the handle 54. When the heater moves to the end closest to the door 11, the heating mechanism 5 is completely disengaged from the entrance of the roller 3, and there is a gap between the heating mechanism 5 and the roller 3. At this time, the distance data obtained by the second sensor is less than the second threshold.

[0034] In this embodiment, the lever 53 is pulled directly by the handle 54, without the need for electric or pneumatic power. Even in the event of a power outage or power failure, the heater can still be driven away from the roller 3. In addition, eliminating the need for electric or pneumatic drive can significantly reduce the cost of the film machine.

[0035] It is understandable that in other embodiments, the movable component may also include a telescopic rod and a first driver. The first driver is fixed to the door 11, and the heater is fixed to the telescopic rod. The first driver drives the telescopic rod to extend and retract along the axial direction of the roller 3. Using a telescopic rod can effectively lock the space occupied by the movable component and reduce the volume of the movable component. In addition, the cooperation between the first driver and the telescopic rod can make the movement distance of the heating mechanism 5 more accurate and reliable.

[0036] In this embodiment, the locking mechanism includes a solenoid valve 14 installed on the frame 1. The controller controls the solenoid valve 14 to be energized or de-energized. A metal part 13 corresponding to the solenoid valve 14 is provided on the door 11. When the solenoid valve 14 is energized, it attracts the metal part 13 to lock the door 11. When the rotational speed of the roller 3 is lower than a first threshold and the distance between the heating mechanism 5 and the door 11 is less than a second threshold, the controller controls the solenoid valve 14 to be de-energized to unlock the door 11. That is, when the roller 3 stops rotating and the heating mechanism 5 disengages from the roller 3, the controller controls the solenoid valve 14 to be de-energized. The demagnetizing force is released, thereby unlocking the door 11 and allowing the user to control the door 11 to rotate via the handle 12 on the door 11, thus opening the door 11. When the rotation speed of the roller 3 is higher than the first threshold, or the distance between the heating mechanism 5 and the door 11 is greater than the second threshold, it indicates that the roller 3 is in a high-speed rotation state, or the heating mechanism 5 is still inside the roller 3. At this time, the controller still provides power to the solenoid valve 14, so that the solenoid valve 14 maintains its attraction to the door 11, thereby keeping the door 11 in a locked state and preventing the user from opening the door 11.

[0037] In this embodiment, the injection mechanism 4 includes an injector 42 and an injection driver 41 that drives the injector 42. A connecting plate 43 is installed at the output end of the injection driver 41. The injection driver 41 is connected to the injector 42 through the mounting plate. The length direction of the injector 42 is parallel to the central axis of the roller 3. The injection driver 41 drives the injector 42 to slide along the axial direction of the roller 3 so that the injector 42 enters or leaves the roller 3. The injector 42 is provided with an atomizing nozzle. When it is necessary to inject liquid into the roller 3, the injection driver 41 controls the injector 42 to extend into the roller 3, and then sprays the film liquid onto the inner wall of the roller 3 through the atomizing nozzle to realize the injection of the film liquid. After the injection of the film liquid is completed, the injection driver 41 controls the injector 42 to move away from the roller 3.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A centrifugal film machine with a safety door, characterized in that: The device includes a frame, within which are a controller, a drive motor, a roller driven by the drive motor, and a heating mechanism. The controller is electrically connected to a first sensor and a second sensor. The first sensor is used to acquire the output power of the drive motor. A door is rotatably mounted on the front side of the frame. The frame is equipped with a locking element for locking the door. The controller controls the locking element to lock or unlock the door. The roller forms an entrance on the side facing the door. The heating mechanism is slidably mounted on the door and slides along the roller axis to enter or move away from the roller. The door is equipped with a second sensor for acquiring the distance between the heating mechanism and the door. The controller has a first threshold and a second threshold. The locking element releases the door only when the output power of the drive motor is lower than the first threshold and the distance between the heating mechanism and the door is less than the second threshold.

2. The centrifugal film machine with a safety door according to claim 1, characterized in that: The heating mechanism includes a heater and a movable component. The movable component is installed on the door body and drives the heater to slide along the axial direction of the roller, so as to allow the heater to extend into or away from the roller.

3. The centrifugal film machine with a safety door according to claim 2, characterized in that: The movable component includes a telescopic rod and a first driver. The first driver is fixed to the door body, and the heater is fixed to the telescopic rod. The first driver drives the telescopic rod to extend and retract along the axial direction of the roller.

4. The centrifugal film machine with a safety door according to claim 2, characterized in that: The movable component includes a pull rod and a handle. One end of the pull rod is connected to the heater, and the other end passes through the door and is connected to the handle. The handle drives the heater to slide along the axial direction of the roller through the pull rod.

5. The centrifugal film mill with a safety door according to claim 2, characterized in that: The heater includes several circumferentially distributed heating tubes and corresponding reflectors. The heating tubes and the drum are arranged in concentric circles. The reflector has an opening facing the inner wall of the drum. The heating tubes are located between the reflector and the inner wall of the drum. The reflector reflects part of the light emitted by the heating tubes back to the inner wall of the drum.

6. The centrifugal film machine with a safety door according to claim 1, characterized in that: The locking mechanism includes a solenoid valve installed on the frame. The controller controls the solenoid valve to be energized or de-energized. The door is provided with a metal part corresponding to the solenoid valve. When the solenoid valve is energized, it attracts the metal part to lock the door. The controller only controls the solenoid valve to be de-energized when the rotational speed of the roller is lower than a first threshold and the distance between the heating mechanism and the door is less than a second threshold, so as to unlock the door.

7. The centrifugal film mill with a safety door according to claim 1, characterized in that: When the heating mechanism slides to the end near the door, the heating mechanism is completely disengaged from the roller inlet, and there is a gap between the heating mechanism and the roller.

8. The centrifugal film machine with a safety door according to claim 1, characterized in that: The centrifugal film machine also includes a liquid injection mechanism, which includes a liquid injector and a liquid injection driver that drives the liquid injector. The liquid injector is parallel to the axial direction of the drum, and the liquid injection driver drives the liquid injector to slide along the axial direction of the drum so that the liquid injector enters or leaves the drum.

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