Structure and method for controlling gluing gram weight of patch

Abstract

The invention discloses a structure and a method for controlling the gluing gram weight of a patch, and belongs to the technical field of patch processing. Comprising a rack, a gluing roller is arranged on the rack, a gluing assembly is arranged in front of the gluing roller, the gluing assembly is movably connected to the rack, a gluing gap is formed between the gluing assembly and the gluing roller, and a base material of a patch penetrates through the gluing gap; a thickness gauge is arranged behind the gluing roller, and the thickness gauge reciprocates to detect the thickness of the glued patch; an adjusting mechanism is further arranged on the rack and comprises an eccentric wheel and a distance measuring instrument, the eccentric wheel is rotationally arranged on the rack and is in contact connection with the gluing assembly, and the distance measuring instrument is used for measuring the distance between the gluing mold and the gluing roller. According to the structure and the method, the gluing gap can be adjusted according to the gluing thickness of the patch, so that the gram weight stability in the patch production process is ensured; and moreover, the repeated positioning precision is high, and the gluing gap can be quickly recovered to a proper gap after being changed, so that the consistency of the thickness of the adhesive layer of the patch is good.

Description

Technical Field

[0001] The invention relates to the technical field of patch processing, in particular to a structure and method for controlling the gram weight of a patch coating. Background Art

[0002] Patches are usually made by gluing, laminating, slitting and cutting two or more substrates (such as films, papers, non-woven fabrics and spunlace fabrics) using a special laminating machine. With the improvement of the standardization and parameterization of patch production, the processing requirements of patches are getting higher and higher. Among them, gram weight is an important indicator to measure the quality of patches, and the thickness of the glue coating of patches is an important parameter to judge gram weight. Common laminating machines cannot measure the weight of patches. Generally, they are judged whether they are qualified based on the frequency and number of random inspections during the production process and the experience of the processing personnel. When the product is judged to be unqualified, the processing personnel will adjust the gap of glue coating to change the thickness of the patch glue layer; for example, when the gram weight is overweight, the gap of glue coating is reduced to reduce the thickness of the glue layer to reduce the gram weight, otherwise the gap of glue coating is increased; and the unqualified patches that have been produced can only be destroyed, resulting in a certain amount of waste.

[0003] Usually, the adjustment of the glue coating gap is fine-tuned by the hand wheel and the lead screw, and after the adjustment, a certain number of patches need to be produced to ensure the stability of the patch thickness, and the patches with unstable thickness will still be destroyed as unqualified products. In addition, the patch colloid is generally processed from medicinal herbs, so the medicinal ingredients may be dissolved in the patch colloid, resulting in foreign matter mixed in the colloid, and the foreign matter will be blocked in the glue coating port or scratch the substrate or the glue layer on the glue coating roller during the production process. At this time, it is necessary to increase the glue coating gap to remove the foreign matter, and then adjust the glue coating gap to a suitable range. The repeated positioning accuracy of the above-mentioned method of adjusting by the lead screw is difficult to ensure, which leads to poor consistency of the glue coating thickness. The gap needs to be adjusted multiple times by the thickness change of the patch glue layer to reach the appropriate gap range, which will undoubtedly increase the number of unqualified products and cause cost waste. Summary of the invention

[0004] The purpose of the present invention is to provide a structure for controlling the grammage of the glue coating of the patch, which can timely adjust the glue coating gap according to the glue coating thickness of the patch to ensure the stability of the grammage during the patch production process; and the structure has high repeated positioning accuracy, and the glue coating gap can be quickly restored to an appropriate gap after a change, so that the consistency of the thickness of the glue layer of the patch is good.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A structure for controlling the grammage of glue coating on a patch comprises a frame, a glue coating roller is arranged on the frame, a glue coating assembly is arranged in front of the glue coating roller, the glue coating assembly is movably connected to the frame and a glue coating gap is formed between the glue coating assembly and the glue coating roller, and a base material of the patch passes through the glue coating gap; a thickness gauge is arranged behind the glue coating roller, and the thickness gauge reciprocates along the length direction of the glue coating roller to detect the thickness of the base material of the glue coated patch; an adjusting mechanism is also arranged on the frame, and the adjusting mechanism comprises an eccentric wheel and a distance meter, the eccentric wheel is rotatably arranged on the frame and is in contact with the glue coating assembly, and a probe of the distance meter is in contact with the glue coating assembly to measure the distance between the glue coating mold and the glue coating roller.

[0007] Here, the width of the gluing gap is adjusted by rotating the eccentric wheel, so that the change of the width of the gluing gap is continuous and stable, and the distance is monitored with a rangefinder to make the adjustment more accurate. The eccentric wheel and the gluing component are in contact and connected, and are independent structures from each other. Even if the position of the gluing component changes, it does not affect the state of the eccentric wheel. Therefore, after the gluing gap becomes larger after the gluing component moves, it is pulled back to the position in contact with the eccentric wheel again, which is the initial positioning accuracy of the gluing gap, so there is no need to readjust the positioning, which improves the speed and accuracy of repeated positioning. In addition, the consistency of the thickness of the adhesive layer of the patch is good, avoiding the problem of many defective products caused by readjusting the width of the gluing gap.

[0008] The thickness of the patch after glue coating is monitored in real time using a thickness gauge, so that the glue coating gap and glue output can be adjusted in time according to the change in thickness, and the weight of the patch can be accurately controlled and adjusted to avoid the production of defective products and the increase in costs.

[0009] Preferably, the glue coating assembly includes a mounting plate and a glue coating mold, the glue coating mold is fixed on the mounting plate, both ends of the mounting plate are connected to the frame through a cylinder, and a glue coating gap is formed between the glue coating mold and the glue coating roller; the side wall of the eccentric wheel is in contact and connected with the side wall of the mounting plate.

[0010] The cylinder can be used to push out the glue coating assembly quickly and stably to have enough space to remove foreign objects. The side wall of the eccentric wheel is in contact with the side wall of the mounting plate. By rotating the eccentric wheel, the distance between the glue coating mold and the glue coating roller can be changed.

[0011] Preferably, the rangefinder is a micrometer, the probe of the micrometer is against the side wall of the mounting plate; and the eccentric wheel is connected to a servo motor.

[0012] Preferably, the thickness gauge is an X-ray thickness gauge, comprising an X-ray transmitter and an X-ray receiver, the X-ray transmitter and the X-ray receiver are centrally arranged on a frame and reciprocate via a synchronous belt, and the glue-coated patch substrate passes between the X-ray transmitter and the X-ray receiver.

[0013] Preferably, a slide groove is provided on the bottom side of the mounting plate, a slideway cooperating with the slide groove is provided on the frame, and two sets of adjustment mechanisms are provided on the frame, and the two sets of adjustment mechanisms are arranged on both sides of the mounting plate.

[0014] Preferably, it also includes a control system and a display screen, and the thickness gauge, distance meter, servo motor and cylinder are electrically connected to the control system; the control system is also electrically connected to the pumping device of the glue coating mold.

[0015] Preferably, the thickness gauge is also provided with a control screen, which is used to set the thickness gauge and can display the thickness change of the patch substrate after glue coating.

[0016] Preferably, the glue coating roller is rotatably arranged on the frame, and a guide roller is further arranged between the glue coating roller and the thickness gauge, and the guide roller guides the substrate of the patch to pass through the thickness gauge in parallel.

[0017] The purpose of the present invention is to provide a method for controlling the grammage of the adhesive coating on the patch. By using the structure in the above technical solution, the method can detect and adjust the grammage of the patch at any time, avoid the production of defective products, and reduce costs.

[0018] To achieve the above object, the present invention adopts the following technical solutions:

[0019] S0: inputting the gram weight of the patch and the standard thickness of the patch corresponding to the gram weight as parameters in the control system, and adjusting the glue coating structure to an initial state;

[0020] S1: adjusting the glue coating gap between the glue coating roller and the glue coating mold to a suitable width through the adjustment mechanism as claimed in claim 1, so that the base material of the patch passes through the glue coating gap, the glue coating mold applies the colloid on the base material of the patch, and the glue coating roller rotates to follow the base material of the patch to move forward;

[0021] S2: The glue-coated patch substrate passes through the thickness gauge in parallel, and the thickness gauge reciprocates along the length direction of the glue coating roller, continuously and linearly monitoring the glue coating thickness of the substrate and feeding back to the control unit;

[0022] S3: the control system controls the action of the regulating mechanism according to the data fed back by the thickness gauge; when the coating thickness of the base material of the patch is greater than the standard thickness of the patch, the regulating mechanism is operated to reduce the coating gap; when the coating thickness of the base material of the patch is less than the standard thickness of the patch, the regulating mechanism is operated to increase the coating gap;

[0023] S4: The control system can also be connected with the pumping device of the glue coating mold to control the glue output of the glue coating mold.

[0024] Compared with the prior art, the above technical scheme has the following beneficial effects: the adjustment accuracy of the glue coating gap is higher, and rapid repeated positioning can be achieved while ensuring repeated positioning accuracy; the glue coating thickness and glue coating amount are adjusted in time according to the changes in the thickness of the patch, so as to achieve precise control of the gram weight of the patch and avoid the production of defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 A top view of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the second angle of the present invention (without the glue coating roller, glue coating assembly and thickness gauge);

[0028] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure of part A;

[0029] Figure 5 is a schematic diagram of a three-dimensional structure of the present invention from a third angle;

[0030] Figure 6 It is a side view of the cutaway structure of the present invention.

[0031] In the figure: 1 frame; 11 guide rail; 2 glue roller; 21 driving mechanism; 3 glue mold; 31 mounting plate; 32 cylinder; 34 slide; 35 glue outlet; 36 glue inlet; 4 glue gap; 5 thickness gauge; 51 X-ray transmitter; 52 X-ray receiver; 6 adjustment mechanism; 61 eccentric wheel; 62 distance meter; 63 probe; 64 servo motor; 7 guide roller; 8 substrate. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] like Figures 1 to 6It is shown that a structure for controlling the gram weight of the adhesive coating of the patch includes a frame 1, a glue coating roller 2 is arranged on the frame 1 through a driving mechanism 21, a glue coating assembly is arranged in front of the glue coating roller 2, the glue coating assembly is movably connected to the frame 1 and a glue coating gap 4 is formed between the glue coating assembly and the glue coating roller 2, the glue coating assembly is provided with a glue outlet, the base material 8 of the patch passes through the glue coating gap 4, the glue coating roller 2 rotates to drive and follow the base material of the patch to rotate, and the colloid of the glue outlet is applied to the base material of the patch. A thickness gauge 5 is also arranged behind the glue coating roller 2, and the thickness gauge 5 reciprocates along the length direction of the glue coating roller 2 to detect the thickness of the base material of the patch after the glue coating. An adjustment mechanism 6 is also provided on the frame 1. The adjustment mechanism 6 includes an eccentric wheel 61 and a distance meter 62. The eccentric wheel 6 is rotatably set on the frame 1 and is in contact with the glue coating assembly to adjust the size of the glue coating gap 4. The probe of the distance meter is in contact with the glue coating assembly to measure the distance between the glue coating mold and the glue coating roller; the distance meter 62 is preferably a micrometer. The eccentric wheel 61 rotates to push the side wall of the glue coating assembly away from the glue coating roller 2 to adjust the glue coating gap 4. The probe 63 of the micrometer is against the side wall of the glue coating assembly. The probe 63 extends or shortens with the change of the glue coating gap 4, thereby achieving a more accurate measurement of the distance of the glue coating gap 4. Here, the size of the glue coating gap 4 is adjusted by rotating the eccentric wheel 61, so that the change of the distance of the glue coating gap 4 is continuous and stable, and the distance is monitored with the distance meter 62 to make the adjustment more accurate.

[0034] In a preferred case, the glue coating assembly includes a mounting plate 31 and a glue coating mold 3, the glue coating mold 3 is fixed on the mounting plate 31, and the two ends of the mounting plate 31 are movably connected to the frame 1 through a cylinder 32, and a glue coating gap 4 is formed between the glue coating mold 3 and the glue coating roller 2, and a glue outlet 35 is provided on the side of the glue coating mold 3 close to the glue coating roller 2, and a glue inlet 36 is also provided on the glue coating mold 3, and the glue coating mold 3 is communicated with the pumping device of the colloid through the glue inlet 36, and the base material of the patch passes through the glue coating gap 4 and is attached to the surface of the glue coating roller 2, and the colloid flows out from the glue outlet 36 of the glue coating mold 3 and is applied to the surface of the patch base material to form a glue layer. Further, the bottom side of the mounting plate 31 is provided with a slide 34, and the frame 1 is provided with a guide rail 11 that cooperates with the slide 34, which enhances the stability of the mounting plate 31 when it moves.

[0035] Furthermore, the side wall of the eccentric wheel 61 is in contact with and connected to the side wall of the mounting plate 31, and the eccentric wheel 61 is connected to a servo motor 64 through a reducer. The servo motor 64 drives the eccentric wheel 61 to rotate, and the eccentric wheel 61 pushes the side wall of the mounting plate 31 to move. The gluing mold 3 follows the movement of the mounting plate 31 away from the gluing roller 2, thereby adjusting the gluing gap 4. The probe 63 of the micrometer rests on the side wall of the mounting plate 31 and will extend or shorten as the gluing gap 4 changes, thereby achieving a more accurate measurement of the distance of the gluing gap 4.

[0036] When there is a foreign object at the gluing mold 3 or the gluing port 3, the cylinder 32 connected to the mounting plate 31 is started to quickly push the gluing assembly away from the gluing roller 2 so that there is enough space to remove the foreign object. Then the push rod of the cylinder 32 is retracted to pull the gluing mold 3 back through the mounting plate 31 to keep it in contact with the eccentric wheel 61. At this time, the probe 63 of the rangefinder 62 is against the mounting plate 31 to measure the width of the gluing gap. According to the detection data of the rangefinder 62, the eccentric wheel 61 will rotate to fine-tune the gluing gap 4 to reach a suitable distance, thereby realizing the rapid positioning of the gluing gap 4 again with high positioning accuracy, without the need for manual adjustment multiple times, avoiding the production of defective products and reducing costs. In the process of the eccentric wheel 61 rotating to adjust the gluing gap, the cylinder 32 drives the mounting plate 31 to always keep in contact with the eccentric wheel 61.

[0037] In a preferred case, two groups of adjustment mechanisms 6 are provided on the frame 1, and the two groups of adjustment mechanisms 6 are arranged on both sides of the mounting plate 31, and the two groups of adjustment mechanisms 6 can act independently to adjust the mounting plate 31 respectively, thereby further ensuring the flexibility and accuracy of adjusting the glue coating gap 4.

[0038] In a preferred case, the thickness gauge 5 is an X-ray thickness gauge, including an X-ray transmitter 51 and an X-ray receiver 52. The X-ray transmitter 51 and the X-ray receiver 52 are centrally arranged on the frame 1 and reciprocate through a synchronous belt. The adhesive-coated patch substrate passes parallel to between the X-ray transmitter 51 and the X-ray receiver 52, and the overall structure is simple. Furthermore, the thickness gauge 5 is also provided with a control screen (not shown in the drawings), which sets parameters of the thickness gauge 5 and can linearly display the thickness of the patch detected by the thickness gauge 5, so that the thickness change of the patch after adhesive coating can be more intuitively understood.

[0039] In a preferred case, a guide roller 7 is further provided between the glue coating roller 2 and the thickness gauge 5. The guide roller 7 guides the base material of the patch to stably pass through the thickness gauge 5, so that the data measured by the thickness gauge 5 is more accurate and reliable.

[0040] In one embodiment, control system and display screen (not shown in the accompanying drawings) are also included, and thickness gauge 5, rangefinder 62 and servo motor 64 and cylinder 32 are electrically connected with control system. The actual value of the detected patch substrate thickness is fed back to control system by thickness gauge 5, and the control system compares the numerical value and target value fed back by thickness gauge 5, thereby sending a signal to servo motor 64 to drive eccentric wheel 61 to rotate, and gluing gap 4 is fine-tuned, so that the thickness value of patch is within a suitable range, thereby ensuring that the grammes per square metre of patch meets the standard. Simultaneously, control system changes according to the distance of the gluing gap 4 measured by rangefinder 62, and controls servo motor 64 to move or stop. Display screen is used for inputting control commands for the device for gluing of patch and parameter setting is performed to the device.

[0041] In one embodiment, the control system is also electrically connected to the pumping device of the glue coating mold 3. The control system controls the rotation speed of the pumping device through the detection data of the patch thickness by the thickness gauge 5, thereby increasing or decreasing the glue output of the glue coating mold 3, and more comprehensively controlling the gram weight of the patch.

[0042] When in use, the device is adjusted to the initial position, and the distance meter 62 is recorded as the zero point; then the device is started, and the servo motor 64 drives the eccentric wheel 61 to rotate and push the glue coating mold 3 to move away from the glue coating roller 2 to form a glue coating gap 4. The probe 63 of the distance meter 62 extends as the glue coating gap 4 increases. When the value measured by the probe 63 reaches the set distance, the eccentric wheel 61 can stop rotating, and the glue coating operation can be started on the base material of the patch. When foreign matter is found in the glue coating mold 3, the cylinder 32 The push-up mounting plate 31 is quickly moved away from the glue roller 2 so that there is enough space to remove foreign matter, and then the push rod of the cylinder 32 is contracted to pull the glue mold 3 back so that the side wall of the mounting plate 31 contacts the side of the eccentric wheel 61, and the probe 63 of the rangefinder 62 is against the mounting plate 31 to detect the glue gap 4. The control system rotates the eccentric wheel 61 according to the detection data of the rangefinder 62 to fine-tune the glue gap 4 to reach a suitable distance, thereby realizing the rapid positioning of the glue gap 4 again and with high positioning accuracy. The patch passes through the glue gap 4 to complete the glue coating operation, and then follows the rotation of the glue roller 2 and moves backward through the thickness gauge 5. The thickness gauge 5 reciprocates in the width direction of the substrate to detect the thickness of the substrate after glue coating, and displays the detection result on the control screen and feeds back to the control system at the same time. The control system compares the detected thickness change with the standard value. When the glue coating thickness of the patch deviates from the standard value. The control system controls the eccentric wheel to rotate and adjust the width of the glue coating gap 4. If necessary, it will also adjust the pumping device of the glue coating mold 3 to increase or decrease the glue output of the glue coating mold 3, thereby achieving precise control of the weight of the patch.

[0043] The present application also provides a method for controlling the grammage of the adhesive coating of the patch, which is characterized by comprising the following steps:

[0044] S0: inputting the gram weight of the patch and the standard thickness of the patch corresponding to the gram weight as parameters in the control system, and adjusting the glue coating structure to an initial state;

[0045] S1: adjusting the glue coating gap between the glue coating roller and the glue coating mold to a suitable width through the adjustment mechanism as claimed in claim 1, so that the base material of the patch passes through the glue coating gap, the glue coating mold applies the colloid on the base material of the patch, and the glue coating roller rotates to follow the base material of the patch to move forward;

[0046] S2: The glue-coated patch substrate passes through the thickness gauge in parallel, and the thickness gauge reciprocates along the length direction of the glue coating roller, continuously and linearly monitoring the glue coating thickness of the substrate and feeding back to the control unit;

[0047] S3: the control system controls the action of the regulating mechanism according to the data fed back by the thickness gauge; when the coating thickness of the base material of the patch is greater than the standard thickness of the patch, the regulating mechanism is operated to reduce the coating gap; when the coating thickness of the base material of the patch is less than the standard thickness of the patch, the regulating mechanism is operated to increase the coating gap;

[0048] S4: The control system can also be connected with the pumping device of the glue coating mold to control the glue output of the glue coating mold.

[0049] This embodiment is only an illustration of the concept and implementation of the present invention, and does not limit it. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A structure for controlling the gram weight of adhesive coating on a patch, comprising a frame, on which an adhesive coating roller is arranged, characterized in that: A glue coating assembly is provided in front of the glue coating roller, which is movably connected to the frame and a glue coating gap is formed between the glue coating assembly and the glue coating roller, and the base material of the patch passes through the glue coating gap; a thickness gauge is provided behind the glue coating roller, and the thickness gauge reciprocates along the length direction of the glue coating roller to detect the thickness of the base material of the patch after glue coating; an adjusting mechanism is also provided on the frame, and the adjusting mechanism includes an eccentric wheel and a distance meter. The eccentric wheel is rotatably set on the frame and is in contact with the glue coating assembly, and the probe of the distance meter is in contact with the glue coating assembly to measure the distance between the glue coating mold and the glue coating roller.

2. The structure for controlling the grammage of the adhesive coating of the patch according to claim 1, characterized in that: The glue coating assembly includes a mounting plate and a glue coating mold. The glue coating mold is fixed on the mounting plate. Both ends of the mounting plate are connected to the frame through a cylinder. A glue coating gap is formed between the glue coating mold and the glue coating roller. The side wall of the eccentric wheel is in contact with the side wall of the mounting plate.

3. The structure for controlling the grammage of the adhesive coating of the patch according to claim 2, characterized in that: The distance meter is a micrometer, and the probe of the micrometer is against the side wall of the mounting plate; the eccentric wheel is connected to a servo motor.

4. The structure for controlling the grammage of the adhesive coating of the patch according to claim 3, characterized in that: The thickness gauge is an X-ray thickness gauge, which includes an X-ray transmitter and an X-ray receiver. The X-ray transmitter and the X-ray receiver are centrally arranged on a frame and reciprocate via a synchronous belt. The glue-coated patch substrate passes between the X-ray transmitter and the X-ray receiver.

5. The structure for controlling the grammage of the adhesive coating of the patch according to claim 4, characterized in that: A slide groove is arranged on the bottom side of the mounting plate, a slideway matched with the slide groove is arranged on the frame, and two groups of adjustment mechanisms are arranged on the frame, and the two groups of adjustment mechanisms are arranged on both sides of the mounting plate.

6. The structure for controlling the grammage of the adhesive coating of the patch according to claim 4, characterized in that: It also includes a control system and a display screen. The thickness gauge, distance meter, servo motor and cylinder are electrically connected to the control system; the control system is also electrically connected to the pumping device of the glue coating mold.

7. The structure for controlling the grammage of the adhesive coating of the patch according to claim 6, characterized in that: The thickness gauge is also provided with a control screen, which is used to set the thickness gauge and can display the thickness change of the patch substrate after the glue is applied.

8. The structure for controlling the grammage of the adhesive coating of the patch according to claim 1 or 7, characterized in that: The glue coating roller is rotatably arranged on the frame, and a guide roller is also arranged between the glue coating roller and the thickness gauge, and the guide roller guides the substrate of the patch to pass through the thickness gauge in parallel.

9. A method for controlling the gram weight of adhesive coating on a patch, characterized in that The following steps are involved: S0: inputting the gram weight of the patch and the standard thickness of the patch corresponding to the gram weight as parameters in the control system, and adjusting the glue coating structure to an initial state; S1: adjusting the glue coating gap between the glue coating roller and the glue coating mold to a suitable width through the adjustment mechanism as claimed in claim 1, so that the base material of the patch passes through the glue coating gap, the glue coating mold applies the colloid on the base material of the patch, and the glue coating roller rotates to follow the base material of the patch to move forward; S2: The glue-coated patch substrate passes through the thickness gauge in parallel, and the thickness gauge reciprocates along the length direction of the glue coating roller, continuously and linearly monitoring the glue coating thickness of the substrate and feeding back to the control unit; S3: the control system controls the action of the regulating mechanism according to the data fed back by the thickness gauge; when the coating thickness of the base material of the patch is greater than the standard thickness of the patch, the regulating mechanism is operated to reduce the coating gap; when the coating thickness of the base material of the patch is less than the standard thickness of the patch, the regulating mechanism is operated to increase the coating gap; S4: The control system can also be connected with the pumping device of the glue coating mold to control the glue output of the glue coating mold.

Images