A quality testing device for transdermal patch production applications

Abstract

This invention provides a quality inspection device for transdermal patch production, belonging to the technical field of inspection equipment. It includes an electric chain conveyor, an air compressor, and also comprises an inspection mechanism, a control circuit, a thickness detection circuit, a trigger circuit, and a pushing mechanism. Multiple inspection mechanisms are included, each comprising a sleeve, spring, pressure sensor, movable rod, and bearing mounted together. A fixed frame is mounted on the upper end of the electric chain conveyor frame, and the sleeves of the three inspection mechanisms are respectively mounted on the lower end of the fixed frame. The pushing mechanism includes a cylinder and a push plate mounted together, with push ports at both ends of the frame. The cylinder barrel is mounted on the outside of one of the push ports. The control circuit, thickness detection circuit, and trigger circuit are installed in an electrical control box and electrically connected. When a product fails the quality inspection, the push plate automatically pushes it off the conveyor line into the defective product frame, thereby improving inspection efficiency and ensuring product quality.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for transdermal patch production, and in particular to a quality testing device for transdermal patch production applications. Background Technology

[0002] Transdermal patches are a type of drug delivery system that is applied to the surface of intact skin. When using a transdermal patch, the user peels off the protective film and applies it to the outer side of the skin. The drug is then delivered through the skin barrier into the bloodstream to exert a systemic effect. This transdermal patch delivery method allows drug absorption to be unaffected by factors such as pH in the digestive tract, food, and transport time, and also avoids the first-pass effect of the liver. Transdermal patches offer flexible dosing options, allowing for long-term administration or discontinuation at any time, making them particularly suitable for infants, children, and the elderly with limited swallowing ability who have poor medication adherence.

[0003] Existing transdermal patches vary in type. Some have a layer of medication adhered to the inner surface of the patch (the entire inner side of the patch is on a flat plane), while others have a layer of medication protruding from the inner surface adhered to the center of the patch through methods such as heating. In transdermal patches, the position and thickness of the medication in the center after production (if the medication is too far to the outside of the patch, the adhesive layer at the medication side cannot be guaranteed to adhere evenly to the skin during application, making the drug-loaded transdermal patch relatively easy to separate from the skin, causing inconvenience and affecting the therapeutic effect; similarly, insufficient thickness of the drug-loaded area, i.e., insufficient drug load, will also affect the therapeutic effect) will affect the quality of the finished product and the therapeutic effect. Therefore, manufacturers of transdermal patches in large quantities conduct quality testing on their products after production. Currently, the quality testing of drug-loaded transdermal patches is generally conducted by visual inspection. However, this manual inspection method is time-consuming, labor-intensive, and inefficient. Furthermore, it is affected by the experience and work ethic of the inspectors, and therefore cannot guarantee the effective detection of transdermal patches with quality problems. Summary of the Invention

[0004] To overcome the shortcomings of manual quality inspection in existing transdermal patch production, which is limited by technology and has the drawbacks described in the background, this invention provides a quality inspection device for transdermal patch production that can automatically and continuously inspect finished transdermal patches input into the production line under the joint action of relevant mechanisms. When a product is found to be abnormal, it can be automatically pushed out of the conveyor line and placed into a defective product box, thereby improving inspection efficiency and ensuring product quality.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A quality inspection device for transdermal patch production includes an electric chain conveyor and an air compressor. It is characterized by further comprising a detection mechanism, a control circuit, a thickness detection circuit, a trigger circuit, and a pushing mechanism. The detection mechanism comprises multiple sets, each including a sleeve, a spring, a pressure sensor, a movable rod, and a bearing. The pressure sensor is fixedly installed inside the upper end of the sleeve, a limit plate is installed on the upper end of the movable rod, the spring and the limit plate are movably installed inside the sleeve, and the bearing is rotatably installed on the lower end of the movable rod. A fixed frame is fixedly installed on the upper end of the frame of the electric chain conveyor. The sleeve of the first detection mechanism is fixedly installed at the lower front end of the fixed frame, and the sleeves of the second and third detection mechanisms are respectively fixedly installed on both sides of the lower rear end of the fixed frame. The pushing mechanism includes a cylinder and a push plate. The frame has push ports at both ends located at the rear of the fixed frame, and the piston of the cylinder and the push plate are fixedly installed together. The cylinder barrel is fixedly installed on the outside of one end of the push port. The intake pipes of the intake and exhaust solenoid valves at the front and rear ends of the cylinder barrel and the exhaust pipe of the air compressor's air tank are connected in parallel. The control circuit, thickness detection circuit, and trigger circuit are installed in the electrical control box. The first control power output terminal of the trigger circuit is electrically connected to the power input terminal of the electric chain conveyor. The second control power output terminal of the trigger circuit is electrically connected to the power input terminals of the two intake and exhaust solenoid valves of the cylinder. The power input terminals of the pressure sensors of the second and third sets of detection mechanisms, the power input terminals of the two sets of thickness detection circuits, and the power output terminals of the control circuit are electrically connected. The signal output terminals of the three sets of pressure sensors are electrically connected to the signal input terminals of the control circuit and the two sets of thickness detection circuits. The signal output terminals of the two sets of thickness detection circuits are electrically connected to the signal input terminals of the trigger circuit.

[0007] Furthermore, the outer dimensions of the push plate are smaller than the inner diameter of the push opening, and the lower end of the push plate and the conveying plate of the electric chain conveyor are on the same plane.

[0008] Furthermore, the inner diameters of the two push ports are the same, and they are located on the same plane and the same straight line, with a defective product frame placed at the lower end of one of the push ports.

[0009] Furthermore, the front-to-back distance between the first and second testing mechanisms and the bearings of the testing mechanisms is less than the length of the transdermal patch, and the distance between the bearings of the second and third testing mechanisms is less than the width between the drug areas of the transdermal patch.

[0010] Furthermore, the distance between the lower end of the bearing and the upper end of the conveyor plate of the front-end detection mechanism is smaller than the distance between the lower end of the bearing and the upper end of the conveyor plate of the rear-end two detection mechanisms.

[0011] Furthermore, the control circuit includes a relay and a time control module electrically connected, a resistor, the positive power input terminal of the time control module and the control power input terminal of the relay are connected, the negative power input terminal of the time control module is connected to the negative control power input terminal and the negative power input terminal of the relay and one end of the first resistor, and the other end of the first resistor is connected to one end of the second resistor and the positive control power input terminal of the time control module.

[0012] Furthermore, the thickness detection circuit has two paths, each including an electrically connected resistor, a transistor, and a relay. One end of the first resistor and one end of the second resistor are connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The other end of the second resistor is connected to the emitter of the transistor. The positive power input terminal of the relay is connected to the control power input terminal.

[0013] Furthermore, in the two thickness detection circuits, the normally closed contact of the relay in the first thickness detection circuit is connected to the normally closed contact of the relay in the second thickness detection circuit.

[0014] Furthermore, the trigger circuit includes an electrically connected relay, a time control module, and a time control switch. The power output terminal of the time control module is connected to the positive power input terminal of the relay and the positive power input terminals of the two sets of time control switches. The negative power input terminals of the two sets of time control switches are connected to the negative power input terminal of the relay, the negative power input terminal of the time control module, and the negative control power input terminal.

[0015] Compared with the prior art, the beneficial effects of this invention are: under the action of three sets of detection mechanisms and control circuits, two thickness detection circuits, etc., this invention can detect the finished transdermal patches continuously input by the electric chain conveyor. When the detected product drug thickness is insufficient or not centered, the trigger circuit can control the two intake and exhaust solenoid valves of the cylinder to work respectively, and then the push plate automatically pushes it out of the conveyor line into the defective product frame, thereby improving the detection efficiency and ensuring product quality. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is the circuit diagram of the present invention. Detailed Implementation

[0020] Figures 1-3As shown, a quality inspection device for transdermal patch production includes a power supply module A1, an electric chain conveyor M, and an air compressor (not shown). It also includes a detection mechanism 1, a control circuit 2, a thickness detection circuit 3, a trigger circuit 4, and a pushing mechanism. The detection mechanism 1 has three sets, each including a rectangular sleeve 101, a spring 102, pressure sensors (A2, A, A4), a movable rod 103, and a bearing 104. The upper end of the sleeve 101 is a closed structure, and the lower end has a guide hole 1011 in the middle (to facilitate the up-and-down movement of the movable rod). The pressure sensors (A2, A, A4) are installed inside the upper end of the sleeve 101, with their force-bearing surfaces located at the lower end. A rectangular limiting plate 1031 with an outer diameter smaller than the inner diameter of the sleeve is welded to the upper end of the movable rod 103. The spring 102... The limiting plate 1031 is movably fitted inside the sleeve 101 from top to bottom. A connecting rod 105 is horizontally welded to the lower end of the movable rod 103. The inner ring of the bearing 104 is tightly fitted to the outer end of the connecting rod 105. A "Π"-shaped fixing frame 5 is welded to the upper end of the frame of the electric chain conveyor. The upper end of the sleeve 101 of the first set of detection mechanisms is vertically distributed and welded to the middle of the lower front end of the fixing frame 5. The upper ends of the sleeves 101 of the second and third sets of detection mechanisms are vertically distributed and welded to the lower rear sides of the fixing frame 5, respectively. The pushing mechanism includes a cylinder 6 and a push plate 7. A rectangular push port 51 is located on the left and right sides of the rear end of the frame of the fixing frame. The front end of the piston of the cylinder 6 and the middle of the rear end of the push plate 7 are welded together. A "┌" is welded to the two outer ends of the cylinder barrel of the cylinder 6. Two support seats 61 are bolted to the outer sides of the right end push port 51. The intake pipes of the intake and exhaust solenoid valves at the front and rear ends of the cylinder 6 and the exhaust pipe of the air compressor's air tank are connected in parallel through pipelines. The power supply module A1, control circuit 2, thickness detection circuit 3, and trigger circuit 4 are installed in the electrical control box 8 of the electric chain conveyor.

[0021] Figures 1-3As shown, the outer dimension of the push plate 7 is smaller than the inner diameter of the push opening 51, and the lower end of the push plate 7 and the conveyor plate of the electric chain conveyor M are on the same plane. The inner diameters of the two push openings 51 are the same, and they are on the same plane and the same straight line. A defective product frame (not shown in the figure) is placed at the lower end of the left push opening 51. The front-to-back distance between the first and second testing mechanisms and the bearings 104 of the testing mechanisms is slightly smaller than the front-to-back width of the transdermal patch 9. The left-to-right distance between the bearings 104 of the second and third testing mechanisms is slightly smaller than the left-to-right width of the drug area of ​​the transdermal patch 9. The distance between the lower end of the bearing 104 of the front testing mechanism and the upper end of the conveyor plate is smaller than the distance between the lower end of the bearing 104 of the rear two testing mechanisms and the upper end of the conveyor plate. The control circuit includes a relay J1 and a time control module A3, resistors R4 and R5 connected via circuit board wiring. The positive power input pin 1 of the time control module A3 is connected to the control power input pin of the relay J1. The negative power input pin 2 of the time control module A3 is connected to the negative control power input pin 4, the negative power input pin of the relay J1, and one end of the first resistor R5. The other end of the first resistor R5 is connected to one end of the second resistor R4 and the positive control power input pin 3 of the time control module A3. The first thickness detection circuit includes resistors R1 and R2, a transistor Q1, and a relay J connected via circuit board wiring. One end of the first resistor R1 and one end of the second resistor R2 are connected to the base of the transistor Q1. The collector of the transistor Q1 is connected to the negative power input pin of the relay J. The other end of the second resistor R2 is connected to the emitter of the transistor Q1. The positive power input pin of the relay J is connected to the control power input pin. The second thickness detection circuit includes resistors R and R3, transistor Q, and relay J2 connected via circuit board wiring. One end of the first resistor R and one end of the second resistor R3 are connected to the base of transistor Q. The collector of transistor Q is connected to the negative power input terminal of relay J2. The other end of the second resistor R3 is connected to the emitter of transistor Q. The positive power input terminal of relay J2 is connected to the control power input terminal. In the two thickness detection circuits, the normally closed contact of relay J in the first thickness detection circuit is connected to the normally closed contact of relay J2 in the second thickness detection circuit. The trigger circuit includes relay J3, time control module A7, and time control switches A5 and A6 connected via circuit board wiring. The power output terminal 5 of time control module A7 is connected to the positive power input terminal of relay J3 and the positive power input terminal 1 of the two sets of time control switches A5 and A6. The negative power input terminal 2 of the two sets of time control switches A5 and A6 is connected to the negative power input terminal of relay J3, the negative power input terminal 2 of time control module A4, and the negative control power input terminal 4.

[0022] Figures 1-3As shown, pins 1 and 2 of the power input terminal of power supply module A1 are connected to the two poles of the 220V AC power supply via wires. The control power input terminal of relay J3 in the trigger circuit is connected to the 380V AC power supply via wires. The normally closed contact terminal of relay J3 in the trigger circuit is connected to the motor power input terminal of the electric chain conveyor M (3KM) via wires. Pins 3 and 4 of time control switches A5 and A6 are connected to the power input terminals of the two intake and exhaust solenoid valves DC1 and DC2 of the cylinder via wires. Pins 3 and 4 of the power output terminal of power supply module A1 are connected to pins 1 and 2 of the power input terminal of pressure sensor A2 of the first set of detection mechanism, the control power input terminal and negative power input terminal of relay J1 in the control circuit, the power input terminal of the trigger circuit, and pins 1 and 2 of time relay module A7 via wires. The power input terminals 1 and 2 of pressure sensor A in the second testing mechanism and pressure sensor A4 in the third testing mechanism, the power input terminals of the two thickness detection circuits (relay J positive power input terminal and transistor Q1 emitter, relay J2 positive power input terminal and transistor Q emitter), the power output terminal of the control circuit, and the normally open contact and negative power input terminal of relay J1 are connected by wires. Pin 3 of the three pressure sensors A2, A, and A4 is connected to the other end of resistor R4, resistor R1, and resistor R by wires. The normally closed contacts of relays J and J2 are connected to pin 3 of the time relay module A4 by wires. Resistors R1, R2, R, R3, R4, and R5 have resistance values ​​of 11KΩ, 1KΩ, 11KΩ, 1KΩ, 20KΩ, and 1KΩ respectively; power supply module A1 is an AC 220V to DC 12V power supply module; pressure sensors A2, A, and A4 are high-precision pressure sensors of model DYZ-100, which have two power input terminals and one signal output terminal; relays J1, J, J2, and J3 are DC 12V; transistors Q1 and Q are model 9013 NPN transistors; time control modules A3 and A7 are model JK-DE time control modules. The relay module has two power input terminals, two control signal input terminals, one power output terminal, and three setting buttons. Technicians can operate the three setting buttons to set the power output time. Each time a control signal is input to the two control signal input terminals, the power output terminal outputs power; otherwise, it does not output power. The time switches A5 and A6 are THC15A time switches with two power input terminals, two power output terminals, and seven setting buttons. Operating the seven setting buttons allows setting the power output time of the two power output terminals.

[0023] Figures 1-3As shown, after the 220V AC power enters the power input terminal of the power supply module A1, the 3rd and 4th pins of the power supply module A1 output a stable 12V DC power supply, which enters the power input terminals of the pressure sensor A2, control circuit, and trigger circuit. The 380V power supply enters the power input terminal of the electric chain conveyor M through the three control power input terminals and three normally closed contacts of the relay J3. The chain plate of the electric chain conveyor M continuously outputs the transdermal patches 9 (with a spacing between every two transdermal patches 9) input from the previous process (such as the electric conveyor that transports finished products, whose end contacts the front end of the electric chain conveyor, enabling the transdermal patch products to be output to the upper front end of the chain plate of the electric chain conveyor M; after testing, the transdermal patches 9 enter the finished product frame at the rear end of the electric chain conveyor) to the lower end of the three sets of testing mechanisms 1. When no transdermal patch 9 reaches the lower end of the front-end detection mechanism 1, the voltage signal output by pin 3 of pressure sensor A2 is divided by R4 and R5 and enters pin 3 of time relay module A3, which is close to 0V. Pin 5 of time relay module A3 does not output power, the electric chain conveyor M continues to be powered and work, and the cylinder's intake and exhaust solenoid valves, etc., will not be powered and work. When a corresponding transdermal patch 9 reaches the lower end of the bearing 104 of the front-end detection mechanism 1, the rear end of the transdermal patch 9 contacts the lower end of the bearing 104 and, during rotation, compresses the spring 102 upward through the movable rod 103 (limiting plate function). The spring compression force acts on the force-bearing surface of the pressure sensor A2, and its pin 3 outputs a high-level voltage signal. After being divided by resistors R4 and R5, the signal enters the pin 3 of the time relay module A3, which is close to 1V. The pin 5 of the time relay module A3 then outputs power for 0.5 seconds (time adjustable) every 1.5 seconds, which enters the positive power input terminal of the relay J1. The relay J1 is energized and closes the control power input terminal and the normally open contact terminal. Consequently, the positive power input terminals of pressure sensors A and A1, relays J and J2, etc., are energized. In about 1.5 seconds, when a transdermal patch moves back and forth to the lower end of the bearing 104 of the second and third detection mechanisms 1, due to the height of the drug area, the left and right sides of the drug will push upwards to the lower end of the bearing 104 of the second and third detection mechanisms 1 respectively. In this way, the bearing 104 of the second and third detection mechanisms 1 will compress the spring 102 through the movable rod 103 (limiting plate function) during rotation. The spring compression force acts on the force-bearing surface of pressure sensors A and A4. The 3rd pin of pressure sensors A and A4 respectively outputs high-level voltage signals. The two high-level signals are divided by resistors R1 and R2 and enter the base of transistor Q1, and divided by resistors R and R3 and enter the base of transistor Q.In practice, when the thickness of the drug-loaded area on the transdermal patch 9 is sufficient, the pressure detected by the pressure sensor A or A4 is relatively high. Thus, the voltage signal output from pin 3 of pressure sensor A is divided by resistors R1 and R2 and enters the base of transistor Q1, where it is higher than 0.7V. Transistor Q1 conducts, and its collector outputs a low level, which enters the negative power input terminal of relay J. Relay J is energized and its control power input terminal and normally closed contact terminal are opened. Similarly, the voltage signal output from pin 3 of pressure sensor A4 is divided by resistors R and R3 and enters the base of transistor Q, where it is higher than 0.7V. When 7V is applied, transistor Q conducts, and its collector outputs a low-level signal that enters the negative power input terminal of relay J2. Relay J2 is energized and its control power input terminal and normally closed contact terminal are opened. In this way, the 12V power supply will not enter pin 3 of time relay module A7 through the control power input terminal and normally closed contact terminal of relay J2, or the control power input terminal and normally closed contact terminal of relay J2. Therefore, pin 3 of time relay module A7 will not be energized, and correspondingly, pin 5 of time relay module A7 will not output a high-level signal that enters the positive power input terminals of relay J3 and time switches A3 and A6. In practice, when the thickness of the drug-carrying area on the left or right side of the transdermal patch 9 is insufficient, or when the drug-carrying area is not centered as much as possible on the transdermal patch, during the 0.5 seconds that relay J1 is energized, the pressure detected by the corresponding pressure sensor A or A4 is relatively low. Thus, the voltage signal output from pin 3 of pressure sensor A, after being divided by resistors R1 and R2, enters the base of transistor Q1 and is below 0.7V. Transistor Q1 is cut off, and its collector no longer outputs a low level to the power input terminal of relay J. Relay J is de-energized and no longer engages. The control power input terminal and normally closed contact terminal are closed; or, the voltage signal output from pin 3 of pressure sensor A4 is divided by resistors R and R3 and enters the base of transistor Q below 0.7V. Transistor Q is cut off, and the collector no longer outputs a low level to the power input terminal of relay J2. Relay J2 is de-energized and no longer engages, thus closing its control power input terminal and normally closed contact terminal. In this way, the 12V power supply will enter pin 3 of time relay module A7 through the control power input terminal and normally closed contact terminal of relay J, or the control power input terminal and normally closed contact terminal of relay J2.

[0024] Figures 1-3As shown, when the thickness of the drug-carrying area on the left or right side of the corresponding transdermal patch is insufficient, or when the drug-carrying area is not centered on the transdermal patch, after a high-level signal is input to pin 3 of the time relay module A7, pin 5 of the time relay module A7 will output power to the relay J3 and the positive power input terminals of the time control switches A5 and A6 for 2 seconds at 1.5-second intervals (time adjustable). During the time that relay J3 is energized and engaged, its control power input terminal and normally closed contact terminal are open. Thus, the electric chain conveyor will lose power and stop working within 2 seconds. At this moment, the defective transdermal patch 9 to be tested is located between the left end of push plate 7 and the two push ports 51. After the time control switch A5 is energized, its pin 3 outputs power for 1 second, which enters the power input terminal of the intake and exhaust solenoid valve DC1 at the right rear end of the cylinder. The intake and exhaust solenoid valve DC1 is energized and the valve core opens. The compressed air output from the air compressor's air tank enters the rear end of the cylinder (the air at the front end of the cylinder is discharged through the exhaust port of solenoid valve DC2). The piston rod of the cylinder pushes push plate 7 to move quickly to the left end. The push plate will push the defective transdermal patch 9 with quality problems into the defective product frame through the left push port 51. When timer switch A6 is energized, its pin 3 outputs power for one second at a time interval, which is then supplied to the power input terminal of the intake / exhaust solenoid valve DC2 on the right front side of the cylinder. The intake / exhaust solenoid valve DC2 opens, allowing compressed air from the air compressor's storage tank to enter the front end of the cylinder (air from the rear end of the cylinder is discharged through the exhaust port of solenoid valve DC1). The cylinder piston rod drives push plate 7 to move rapidly to the right, returning it to its initial position, preparing for the next push of a defective product into the defective product frame. After timer relay module A7 stops outputting power, relay J3 and timer switches A6 and A5 are de-energized and cease operation. When relay J3 is de-energized, its control power input terminal and normally closed contact close, energizing the electric chain conveyor M to transport the next transdermal patch 9 to the lower end of the three testing mechanisms for quality inspection. Through the above, the present invention, with the help of three sets of detection mechanisms and control circuits, and two thickness detection circuits, can detect the finished transdermal patches continuously fed into the electric chain conveyor. When the detected product thickness is insufficient or not centered, the trigger circuit can control the two intake and exhaust solenoid valves of the cylinder to work respectively, and then the push plate will automatically push it out of the conveyor line into the defective product frame, thereby improving the detection efficiency and ensuring product quality.

[0025] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. It will be apparent to those skilled in the art that the present invention is limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0026] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quality inspection device for the production and application of transdermal patches, comprising an electric chain conveyor and an air compressor, characterized in that, It also includes a detection mechanism, a control circuit, two thickness detection circuits, a trigger circuit, and a pushing mechanism. The detection mechanism consists of three sets, each including a sleeve, a spring, a pressure sensor, a movable rod, and a bearing. The pressure sensor is fixedly installed inside the upper end of the sleeve, a limit plate is installed on the upper end of the movable rod, the spring and limit plate are movably installed inside the sleeve, and the bearing is rotatably installed at the lower end of the movable rod. A fixed frame is fixedly installed on the upper end of the electric chain conveyor frame. The sleeve of the first detection mechanism is fixedly installed at the lower front end of the fixed frame, and the sleeves of the second and third detection mechanisms are respectively fixedly installed on both sides of the lower rear end of the fixed frame. The pushing mechanism includes a cylinder and a push plate. Push ports are located at both ends of the frame behind the fixed frame. The piston and push plate of the cylinder are fixedly installed together, and the cylinder barrel is fixedly installed outside one of the push ports. The intake pipes of the intake and exhaust solenoid valves at the front and rear ends of the cylinder barrel and the exhaust pipe of the air compressor's air tank are connected in parallel. The control circuit, thickness detection circuit, and trigger circuit are installed in the electrical control box. The first control circuit of the trigger circuit... The power output terminal of the control circuit is electrically connected to the power input terminal of the electric chain conveyor. The second control power output terminal of the trigger circuit is electrically connected to the power input terminals of the two intake and exhaust solenoid valves of the cylinder. The power input terminals of the pressure sensors of the second and third sets of detection mechanisms and the power input terminals of the two thickness detection circuits are electrically connected to the power output terminal of the control circuit. The signal output terminals of the three pressure sensors are electrically connected to the signal input terminals of the control circuit and the two thickness detection circuits. The signal output terminals of the two thickness detection circuits are electrically connected to the signal input terminal of the trigger circuit. The front-to-back distance between the bearings of the first and second sets of detection mechanisms is less than the length of the transdermal patch. The distance between the bearings of the second and third sets of detection mechanisms is less than the width of the transdermal patch. The distance between the lower end of the bearing of the first set of detection mechanisms and the upper end of the conveyor plate is less than the distance between the lower end of the bearing of the second and third sets of detection mechanisms and the upper end of the conveyor plate.

2. The quality testing device for transdermal patch production and application according to claim 1, characterized in that, The outer dimensions of the push plate are smaller than the inner diameter of the push opening, and the lower end of the push plate and the conveyor plate of the electric chain conveyor are on the same plane.

3. The quality testing device for transdermal patch production and application according to claim 1, characterized in that, The two push ports have the same inner diameter and are on the same plane and the same straight line. A defective product frame is placed at the bottom of one of the push ports.

4. The quality testing device for transdermal patch production and application according to claim 1, characterized in that, The control circuit includes a relay and a time control module electrically connected, a resistor, the positive power input terminal of the time control module connected to the control power input terminal of the relay, the negative power input terminal of the time control module connected to the negative control power input terminal and the negative power input terminal of the relay, one end of the first resistor, the other end of the first resistor connected to one end of the second resistor and the positive control power input terminal of the time control module.

5. The quality testing device for the production and application of transdermal patches according to claim 1, characterized in that, Each thickness detection circuit includes an electrically connected resistor, transistor, and relay. One end of the first resistor and one end of the second resistor are connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The other end of the second resistor is connected to the emitter of the transistor. The positive power input terminal of the relay is connected to the control power input terminal.

6. The quality testing device for transdermal patch production and application according to claim 5, characterized in that, In the two-channel thickness detection circuit, the normally closed contact of the relay in the first-channel thickness detection circuit is connected to the normally closed contact of the relay in the second-channel thickness detection circuit.

7. The quality testing device for the production and application of transdermal patches according to claim 1, characterized in that, The trigger circuit includes an electrically connected relay, a time control module, and a time control switch. The power output terminal of the time control module is connected to the positive power input terminal of the relay and the positive power input terminals of the two sets of time control switches. The negative power input terminals of the two sets of time control switches are connected to the negative power input terminals of the relay, the negative power input terminal of the time control module, and the negative control power input terminal.

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