Film needle feeding device and system

Abstract

The utility model discloses a film needle feeding device and system. The device comprises an electric valve, a throttle valve assembly and an air nozzle assembly which are communicated in sequence. The electric valve is communicated with the compressed air source and is used for controlling air in the compressed air source to flow into the throttle valve assembly after receiving a starting command; the throttle valve assembly comprises two throttle valves, and the throttle valves are used for adjusting the flow of air sprayed by the air nozzle assembly; the air nozzle assembly comprises two air nozzles arranged on the two sides of the film respectively, and the air nozzles are used for spraying airflow to the film so that the film can be unfolded at a preset angle for needle feeding. And each air tap is communicated with one throttle valve. The automatic needle feeding device can be used for automatically feeding needles on an automatic film production line again.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment control, in particular to a film needle device and system. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the utility model recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

[0003] In the PI film production line, when the film enters the setting machine for final imidization and stretching, it is necessary to first fix the edges of the film on both sides to the needle plate or fixture of the corresponding track. This step is generally called needle mounting. If the needle mounting fails, it will directly lead to the film not being able to complete the setting and stretching in a normal form, and it will curl, get stuck, break inside the setting machine, and even the solvent will evaporate and accumulate, leading to more serious consequences such as fire in the furnace. Therefore, once the needle is off abnormally, it is necessary to detect it in time and issue an alarm prompt, and re-mount the needle as soon as possible to reduce losses and ensure the continuity of production.

[0004] The existing technology is mainly used for automatic needle re-threading after the needle is removed in the fabric industry. It uses a slide rail device that is set on the outside of the needle rail and can move back and forth. The slide rail device is provided with a hooking device that can hook the removed fabric back to the needle rail. The hooking device is suitable for fabrics, but not for film products. Because the surface of PI film is smooth and the mechanical strength is relatively large, it is not easy for the hooking device to hook into the film and re-thread the film. Even if it is hooked in, the film will be damaged, and a larger edge gap may be generated from the hooking point.

[0005] In addition, the existing technology also uses reflective photoelectric sensors. When used for polymer films, because the film surface is smooth and the reflectivity is high, when the film vibrates or wrinkles slightly during operation, the signal received by the photoelectric sensor through reflection will produce large fluctuations, which can easily cause output errors of the sensor switch signal and cause misjudgment of the drag needle detection.

[0006] In summary, there is a need for a device that can detect and alarm needle fall-off and automatically re-needle in a thin film automated production line. Utility Model Content

[0007] The present invention provides a film needle-feeding device for solving the problem of automatic re-feeding of film automated production lines. The device comprises:

[0008] It includes an electric valve, a throttle valve assembly and a gas nozzle assembly which are connected in sequence;

[0009] The electric valve is in communication with the compressed air source and is used to control the air in the compressed air source to flow into the throttle valve assembly after receiving a start command;

[0010] The throttle valve assembly includes two throttle valves, and the throttle valves are used to adjust the amount of air sprayed by the air nozzle assembly;

[0011] The air nozzle assembly includes two air nozzles respectively arranged on both sides of the film, and the air nozzles are used to spray airflow toward the film so that the film is unfolded at a preset angle for needle application;

[0012] Each gas nozzle is connected to a throttle valve respectively.

[0013] The embodiment of the utility model provides a film needle-loading system to solve the problem of needle-drop detection and automatic re-needling in a film automated production line. The system comprises: the aforementioned film needle-loading device, a needle-drop detection sensor and a starting device;

[0014] Wherein, the starting device is electrically connected to the needle-off detection sensor and the film needle-on device respectively;

[0015] The needle-out detection sensor is used to detect the needle-out of the film and send a needle-out signal to the starting device;

[0016] The starting device is used to send a starting command to the film needle device after receiving the needle-off signal.

[0017] In the embodiment of the utility model, the electric valve is started to control the air in the compressed air source to flow into the throttle valve assembly, and the air flow rate sprayed out of the air nozzle assembly is adjusted through the throttle valve, so that the air nozzle sprays air flow toward the film, and the film is unfolded at a preset angle to control the throttle valve assembly to correct the curling of the film, thereby realizing the automatic needle-up function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a schematic diagram of a film needle device in an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the air nozzle body in the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the air nozzle bracket in the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the film needle system in the embodiment of the utility model;

[0023] Figure 5 This is a working schematic diagram of the through-beam photoelectric sensor in the embodiment of the utility model;

[0024] Figure 6 This is a flow chart of the operation of the film needle system in the embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0026] Figure 1 It is a schematic diagram of the film needle device in the embodiment of the utility model, including a throttle valve assembly and a gas nozzle assembly of an electric valve 1 connected in sequence;

[0027] The electric valve 1 is in communication with the compressed air source and is used to control the air in the compressed air source to flow into the throttle valve assembly after receiving a start command;

[0028] The throttle valve assembly includes two throttle valves 2, which are used to adjust the amount of air sprayed from the air nozzle assembly;

[0029] The air nozzle assembly includes two air nozzles 3 respectively arranged on both sides of the film, and the air nozzles are used to spray airflow toward the film so that the film is unfolded at a preset angle for needle application;

[0030] Each gas nozzle 3 is connected to a throttle valve 2 .

[0031] During specific implementation, two throttle valves are manually adjusted to adjust the relative sizes of the airflows ejected from the two air nozzles, so that the film is unfolded at a suitable angle, which is conducive to re-needling.

[0032] In one embodiment, the air nozzle 3 includes an air nozzle body 4 and an air nozzle bracket 5 for supporting the air nozzle body 4. Figure 2 This is a schematic diagram of the structure of the air nozzle body in the embodiment of the utility model. Figure 3 This is a schematic diagram of the structure of the air nozzle bracket in the embodiment of the utility model, wherein the air nozzle bracket 5 is connected to the base of the film production line;

[0033] In one embodiment, the air nozzle body 4 includes an air flow inlet 6, an air flow chamber 7 and multiple air flow outlets 8, wherein the air flow flows in from the air flow inlet 6, flows out from the multiple air flow outlets 8 after passing through the air flow chamber 7, and is sprayed toward the film.

[0034] In one embodiment, the ejection angles of the airflow ejection ports 8 located in the middle are parallel, and the ejection angles of the airflow ejection ports 8 located on both sides are biased toward the central setting angle.

[0035] Specifically, the multiple parallel airflow outlets have a guiding direction and acceleration effect on the ejected airflow. The ejection angles of the airflow outlet 8 located in the middle are parallel, and the ejection angles of the airflow outlets 8 located on both sides are biased towards the center setting angle to enhance the airflow pressure.

[0036] In one embodiment, the air nozzle body 4 is provided with a first mounting hole 9 and a second mounting hole 10;

[0037] The air valve bracket is provided with a third mounting hole 11 corresponding to the first mounting hole 9 and a fourth mounting hole 12 corresponding to the second mounting hole 10 .

[0038] In one embodiment, the fourth mounting hole 12 is a U-shaped hole.

[0039] The mounting bracket makes the two air nozzles located at the upper and lower symmetrical positions of the film, and the air nozzles can be adjusted within a certain range in the horizontal direction. When in use, the air flow size is adjusted through the throttle valve, and the direction of the air nozzle can be fine-tuned by adjusting the position of the fastening screw in the U-shaped hole to achieve a better film unfolding effect.

[0040] The present utility model also provides a thin film needle system. Figure 4 The schematic diagram of the structure of the film needle system in the embodiment of the utility model, the film needle system comprises: the film needle device 40, the needle removal detection sensor 20 and the starting device 30;

[0041] The starter device 30 is electrically connected to the needle-off detection sensor 20 and the film needle-on device 40 respectively;

[0042] The needle-out detection sensor 20 is used to detect that the film needle is out of the film and send a needle-out signal to the starting device 30;

[0043] The starting device 30 is used to send a starting command to the film needle device 40 after receiving the needle-off signal.

[0044] Figure 5 The schematic diagram of the working of the opposite-beam photoelectric sensor in the embodiment of the utility model. In one embodiment, the needle-dropping detection sensor 20 is an opposite-beam photoelectric sensor arranged at the upper needle position on both sides of the film 50. The opposite-beam photoelectric sensor includes a light-emitting optical fiber sensor 21 and a light-receiving optical fiber sensor 22.

[0045] The light-projecting optical fiber sensor 21 is used to emit light;

[0046] The light receiving optical fiber sensor 22 is used to send a needle-off signal when the light receiving amount of the optical fiber is less than the light receiving amount threshold, and to send a normal state signal otherwise.

[0047] When the film is normally needled, the amount of light received by the optical fiber decreases, and the light-receiving optical fiber sensor outputs an "OFF" signal; when the film is off the needle, there is no detection object between the optical fiber probes, and the sensor outputs an "ON" signal, that is, a needle-off signal.

[0048] In the embodiment of the utility model, the starting device 30 is also used for:

[0049] After receiving the needle-out signal, a first-level alarm signal is issued;

[0050] Within the first set time limit, if the film needle is successfully inserted, the first-level alarm signal is eliminated; if the film needle is not successfully inserted, the second-level alarm signal is issued;

[0051] If the needle is inserted into the film successfully when the second-level alarm signal is issued, the first-level alarm signal and the second-level alarm signal will be eliminated.

[0052] The starting device 30 may be controlled by a circuit or by other automatic methods, all of which should fall within the protection scope of the present utility model.

[0053] In one embodiment, the first-level alarm signal is a sound signal or a light signal, and the first-level alarm signal is displayed using a touch screen or a display;

[0054] The secondary alarm signal is a sound signal or a light signal, and the secondary alarm signal is displayed using a touch screen or a display.

[0055] The needle-out detection sensor 20 may have other designs.

[0056] In one embodiment, the needle-out detection sensor 20 is a macro push switch, and the contact position between the macro push switch and the film adopts a plastic roller and is close to the needle plate; wherein, when the output signal of the macro push switch changes, a needle-out signal is issued.

[0057] The macro push switch reduces the force on the contact point with the film by extending the force arm. The macro push switch uses a plastic roller at the contact point with the film to reduce hardness and friction, and is as close to the needle plate as possible to avoid scratching or abrasions on the normal film.

[0058] In one embodiment, the needle-out detection sensor 20 is a combination of a micro-differential pressure switch and an air nozzle; wherein, when there is no film barrier between the micro-differential pressure switch and the air nozzle, the output signal of the micro-differential pressure switch changes, and a needle-out signal is issued.

[0059] Figure 6This is a flow chart of the thin film needle-applying system used in the embodiment of the utility model. After the thin film needle is removed, the needle-applying detection sensor outputs a needle-applying signal to the starting device, and the starting device sends a first-level alarm signal to alert the operator. At the same time, the thin film needle-applying device is started. If the automatic needle-applying is successful within the set time limit, the first-level alarm is eliminated and the process ends. If the automatic needle-applying is unsuccessful, the starting device sends a second-level alarm to remind the operator to enter the production line and eliminate the abnormality by manual needle-applying. After the manual needle-applying is completed, the first-level alarm signal and the second-level alarm signal are eliminated, and the process ends.

[0060] The utility model fully considers the physical properties of PI film products and the demand for maintaining appearance quality, and provides a device and system for timely alarming and automatically inserting needles after the film needles fall off, thereby reducing the losses caused by needle fall off during the production process and avoiding the risk of people entering the equipment chamber during manual needle insertion and inhaling toxic gases due to the volatilization of the film solvent.

[0061] In addition to the field of PI film production, the utility model is also applicable to other film products and automatic processing of production anomalies caused by film shrinkage or curling in similar processes.

[0062] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A film needle device, characterized in that: include: It comprises an electric valve (1), a throttle valve assembly, and a gas nozzle assembly which are connected in sequence; The electric valve (1) is connected to the compressed air source and is used to control the air in the compressed air source to flow into the throttle valve assembly after receiving a start command; The throttle valve assembly comprises two throttle valves (2), wherein the throttle valves (2) are used to adjust the amount of air ejected from the air nozzle assembly; The air nozzle assembly comprises two air nozzles (3) respectively arranged on both sides of the film, and the air nozzles (3) are used to spray airflow toward the film so that the film is unfolded at a preset angle for needle application; Each gas nozzle (3) is respectively connected to a throttle valve (2).

2. The device according to claim 1, characterized in that The air nozzle (3) comprises an air nozzle body (4) and an air nozzle bracket (5) for supporting the air nozzle body (4); the air nozzle bracket (5) is connected to a film production line base.

3. The device according to claim 2, characterized in that The air nozzle body (4) comprises an air flow inlet (6), an air flow chamber (7) and a plurality of air flow outlets (8), wherein the air flow flows in from the air flow inlet (6), passes through the air flow chamber (7), and then flows out from the plurality of air flow outlets (8) to be sprayed toward the film.

4. The device according to claim 3, characterized in that The ejection angles of the airflow ejection ports (8) located in the middle are parallel, and the ejection angles of the airflow ejection ports (8) located on both sides are biased toward the central setting angle.

5. The device according to claim 4, characterized in that The air nozzle body (4) is provided with a first mounting hole (9) and a second mounting hole (10); The air nozzle bracket is provided with a third mounting hole (11) corresponding to the first mounting hole (9) and a fourth mounting hole (12) corresponding to the second mounting hole (10).

6. The device according to claim 5, characterized in that The fourth mounting hole (12) is a U-shaped hole.

7. A film needle system, characterized in that: include: The film needle device (40), the needle removal detection sensor (20) and the starting device (30) as claimed in any one of claims 1 to 6; The starting device (30) is electrically connected to the needle removal detection sensor (20) and the thin film needle placement device (40) respectively; A needle-out detection sensor (20) is used to send a needle-out signal to a starter (30) after detecting that a needle has been detached from the film; The starting device (30) is used to send a starting command to the film needle-applying device (40) after receiving the needle-off signal.

8. The system according to claim 7, characterized in that The needle-out detection sensor (20) is a photoelectric sensor disposed at the upper needle position along both sides of the film, and the photoelectric sensor comprises a light-projecting optical fiber sensor (21) and a light-receiving optical fiber sensor (22); The light-projecting optical fiber sensor (21) is used to emit light; The light receiving optical fiber sensor (22) is used to send a needle-off signal when the amount of light received by the optical fiber is less than a light receiving amount threshold, and to send a normal state signal otherwise.

9. The system according to claim 7, characterized in that The needle-out detection sensor (20) is a macro push switch, and the contact position between the macro push switch and the film adopts a plastic roller and is closely attached to the needle plate; wherein when the output signal of the macro push switch changes, a needle-out signal is issued.

10. The system according to claim 7, characterized in that The needle-out detection sensor (20) is a combination device of a micro differential pressure switch and an air nozzle; wherein, when there is no film barrier between the micro differential pressure switch and the air nozzle, the output signal of the micro differential pressure switch changes, and a needle-out signal is issued.

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