阅读说明：本技术 铝塑膜涂层质量在线监测方法及其在线监测装置 (Aluminum plastic film coating quality on-line monitoring method and device ) 是由 柯余霖 刘剑光 张武林 于 2020-08-04 设计创作，主要内容包括：本发明提供一种铝塑膜涂层质量在线监测方法,包括以下步骤,在匀墨辊的周向表面设置与铝塑膜待涂布膜面的宽度相适配的绝缘区,绝缘区沿匀墨辊的轴线方向延伸,在绝缘区的两侧设置导电区；通过匀墨辊将涂布液抹匀在铝塑膜待涂布膜面上,并使匀墨辊的绝缘区及绝缘区两侧的导电区均与铝塑膜待涂布膜面上的涂布液接触；在涂布过程中采用电化学工作站在匀墨辊两端的导电区施加一定电压,收集并记录通过的电流与时间的关系曲线,观察该关系曲线中电流大小的变化,从而判断是否漏涂或少涂,本发明能在铝塑膜涂布过程中及时有效的检测涂布质量,并能够确认整卷涂布均一性和涂布量。本发明还提供一种铝塑膜涂层质量在线监测装置。(The invention provides an online monitoring method for the coating quality of an aluminum-plastic film, which comprises the following steps of arranging an insulating area matched with the width of the film surface to be coated of the aluminum-plastic film on the circumferential surface of an ink distributing roller, wherein the insulating area extends along the axial direction of the ink distributing roller, and conducting areas are arranged on two sides of the insulating area; smearing the coating liquid on the surface of the aluminum plastic film to be coated by an ink distributing roller uniformly, and enabling an insulating area of the ink distributing roller and conductive areas on two sides of the insulating area to be contacted with the coating liquid on the surface of the aluminum plastic film to be coated; in the coating process, an electrochemical workstation is adopted to apply a certain voltage to the conductive areas at two ends of the ink distributing roller, a relation curve of the passing current and the time is collected and recorded, and the change of the current in the relation curve is observed, so that whether the coating is omitted or less is judged. The invention also provides an aluminum plastic film coating quality on-line monitoring device.)

1. An on-line monitoring method for the quality of an aluminum-plastic film coating is characterized by comprising the following steps,

step 1: preparing an ink distributing roller, wherein an insulating area matched with the width of the film surface to be coated of the aluminum plastic film is arranged on the circumferential surface of the ink distributing roller, the insulating area extends along the axial direction of the ink distributing roller, and conductive areas are arranged on two sides of the insulating area;

step 2: smearing and coating evenly, namely smearing the coating liquid on the surface of the aluminum plastic film to be coated through an ink distributing roller evenly, and enabling the insulating area of the ink distributing roller and the conductive areas on the two sides of the insulating area to be contacted with the coating liquid on the surface of the aluminum plastic film to be coated;

and step 3: and (3) current detection, namely applying a certain voltage to conductive areas at two ends of the ink distributing roller by adopting an electrochemical workstation in the coating process, collecting and recording a relation curve of the passing current and time, and observing the change of the current in the relation curve so as to judge whether the coating is missed or less.

2. The method for on-line monitoring the coating quality of the aluminum-plastic film according to claim 1, wherein in the step 1, during coating, both sides of the film surface to be coated of the aluminum-plastic film extend out of both sides of the insulation area by 1mm respectively.

3. The method for on-line monitoring the coating quality of the aluminum-plastic film as recited in claim 1, wherein in the step 3, when the current is lower than a certain value, the coating is judged to be missing or insufficient.

4. The method for on-line monitoring the coating quality of the aluminum plastic film as recited in claim 3, wherein in the step 3, the voltage applied to the conductive areas at the two ends of the ink distribution roller by the electrochemical workstation is 3V-20V during the current detection.

5. The aluminum-plastic film coating quality online monitoring method of claim 1, further comprising an alarm device, wherein the alarm device reminds an operator in an acousto-optic mode when coating omission or coating shortage occurs.

6. The utility model provides an aluminium-plastic film coating quality on-line monitoring device, its characterized in that includes even ink roller, the circumference surface of even ink roller is equipped with the insulating zone of width looks adaptation with the aluminium-plastic film waits to coat the face, the insulating zone extends along the axis direction of even ink roller, the both sides of insulating zone are equipped with the conducting region, and during the coating, the insulating zone and the conducting region of insulating zone both sides all contact with the coating liquid on the aluminium-plastic film waits to coat the face to the conducting region of insulating zone both sides is connected with the electrochemistry workstation that is used for collecting and records the current that passes through and time relation curve through the wire.

7. The device for on-line monitoring of the coating quality of the aluminum-plastic film according to claim 6, wherein during coating, two sides of the surface of the aluminum-plastic film to be coated extend out of two sides of the insulation area by 1mm respectively.

8. The on-line monitoring device for the coating quality of the aluminum-plastic film is characterized by further comprising an alarm device, wherein the alarm device is connected with the electrochemical workstation.

9. The device for on-line monitoring the coating quality of the aluminum-plastic film according to claim 6, wherein the voltage applied by the electrochemical station to the conductive areas at the two ends of the ink distribution roller is 3V-20V.

Technical Field

The invention relates to the technical field of aluminum-plastic film production, in particular to an online monitoring method and an online monitoring device for the quality of an aluminum-plastic film coating.

Background

The aluminum plastic film is a film material formed by compounding a nylon layer, an aluminum foil layer, a CPP layer and the like, and the production process of the aluminum plastic film can involve glue coating compounding and coating of nylon and CPP surface slipping agent. The existing aluminum plastic film coating quality detection mainly comprises three types: firstly, whether the coating leakage exists or not is detected on line through a CCD after coating and drying, secondly, the appearance is seen outside/inside the roll through offline spot check, thirdly, whether the design requirements are met or not is determined through thickness and coating dry quantity tests, but because the CCD is detected after the aluminum plastic film is dried, the reaction of production staff is delayed, so that more defective products are generated, and the coating uniformity and the coating quantity of the whole roll cannot be confirmed through an offline spot check mode.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an aluminum-plastic film coating quality online monitoring method and an aluminum-plastic film coating quality online monitoring device, which can timely and effectively detect the coating quality in the aluminum-plastic film coating process, reduce the generation of defective products and confirm the coating uniformity and the coating amount of the whole roll.

In order to achieve the purpose, the invention adopts the following technical scheme:

an on-line monitoring method for the quality of an aluminum-plastic film coating comprises the following steps,

step 1: preparing an ink distributing roller, wherein an insulating area matched with the width of the film surface to be coated of the aluminum plastic film is arranged on the circumferential surface of the ink distributing roller, the insulating area extends along the axial direction of the ink distributing roller, and conductive areas are arranged on two sides of the insulating area;

step 2: smearing and coating evenly, namely smearing the coating liquid on the surface of the aluminum plastic film to be coated through an ink distributing roller evenly, and enabling the insulating area of the ink distributing roller and the conductive areas on the two sides of the insulating area to be contacted with the coating liquid on the surface of the aluminum plastic film to be coated;

and step 3: and (3) current detection, namely applying a certain voltage to conductive areas at two ends of the ink distributing roller by adopting an electrochemical workstation in the coating process, collecting and recording a relation curve of the passing current and time, and observing the change of the current in the relation curve so as to judge whether the coating is missed or less.

Preferably, in step 1, during coating, both sides of the surface of the aluminum plastic film to be coated extend out of both sides of the insulation area by 1mm respectively.

Preferably, in step 3, when the current is lower than a certain value, the coating is judged to be missing or insufficient.

Preferably, in step 3, the voltage applied by the electrochemical workstation to the conductive areas at the two ends of the ink distribution roller is 3V-20V during current detection.

As a preferred scheme, the coating machine is further provided with an alarm device, and when coating omission or coating shortage occurs, the alarm device reminds an operator in an acousto-optic mode.

The utility model provides an aluminium-plastic film coating quality on-line monitoring device, includes even ink roller, the circumferential surface of even ink roller is equipped with the insulating zone of treating the width looks adaptation of coating the membrane face with the aluminium-plastic film, the insulating zone extends along the axis direction of even ink roller, the both sides of insulating zone are equipped with the conducting region, and during the coating, the conducting region of insulating zone and insulating zone both sides all treats the coating liquid contact on the coating membrane face with the aluminium-plastic film to the conducting region of insulating zone both sides is connected with the electrochemistry workstation that is used for collecting and records the current that passes through and time relation curve through the wire.

Preferably, during coating, two sides of the surface of the aluminum plastic film to be coated extend out of two sides of the insulation area by 1mm respectively.

Preferably, the electrochemical work station further comprises an alarm device, and the alarm device is connected with the electrochemical work station.

Preferably, the voltage applied by the electrochemical working station to the conductive areas at the two ends of the ink distributing roller is 3V-20V.

The invention has obvious advantages and beneficial effects compared with the prior art, specifically, an insulating area and a conductive area are arranged on the circumferential surface of the ink distributing roller, the conductive areas on the two sides of the insulating area and the insulating area are both contacted with the coating liquid on the surface of the aluminum plastic film to be coated, voltage is applied to the conductive areas on the two ends of the ink distributing roller through an electrochemical workstation, a relation curve of passing current and time is collected and recorded, and the change of the current in the relation curve is observed to judge whether the coating is missed or not, so that the coating quality can be effectively detected in time in the coating process of the aluminum plastic film, the generation of defective products is reduced, and the coating uniformity and the coating amount of the whole roll can be confirmed.

To more clearly illustrate the structural features and technical means of the present invention and the specific objects and functions attained thereby, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

The attached drawings indicate the following:

10-an ink distributing roller; 11-an insulating region; 12-a conductive region; 13-an electrochemical workstation; 14-a wire; 15-aluminum plastic film.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in FIG. 1, the invention provides an online monitoring device for coating quality of an aluminum plastic film, comprising an ink distribution roller 10, wherein the circumferential surface of the ink distribution roller 10 is provided with an insulating region 11 matched with the width of the film surface to be coated of an aluminum plastic film 15, the insulating region 11 extends along the axial direction of the ink distribution roller 10, two sides of the insulating region 11 are provided with conductive regions 12, during coating, the insulating region 11 and the conductive regions 12 at two sides of the insulating region 11 are both contacted with a coating liquid on the film surface to be coated of the aluminum plastic film 15, and the conductive regions 12 at two sides of the insulating region 11 are connected with an electrochemical workstation 13 for collecting and recording the relation curve of the passing current and time through a lead 14, through observing the change of the current in the relation curve, when the current is lower than a certain value, the coating leakage or the coating shortage is judged, in the actual work, the average value of the current is counted according to the relation curve, and then the difference value of the real-time current and the average value is, an alarm device (not shown) can be added and connected with the electrochemical workstation 13, and when coating leakage or coating shortage occurs, the alarm device reminds an operator in an acousto-optic mode.

During coating, two sides of the surface of the aluminum plastic film 15 to be coated extend out of two sides of the insulation area 11 by 1mm respectively.

The voltage applied by the electrochemical working station 13 to the conductive areas 12 at both ends of the ink distribution roller 10 is 3V-20V.

It should be noted that the coating liquid on the surface of the aluminum plastic film 15 to be coated has conductivity, so that the conductive areas 12 at the two ends of the ink distribution roller 10 can be conducted through the coating liquid.

When the concentration of the coating liquid is constant, the ionic conductivity of the coating liquid is inversely proportional to the thickness of the coating liquid and directly proportional to the length of the coating liquid, and the current-time relation curve is collected under the condition that a certain voltage is applied to the electrochemical workstation 13, and at the moment, the intensity I of the current represents the certain coating liquid thickness.

The relation curve of the current intensity and the actual coating weight is verified through experiments, wherein the value of k is gradually improved through offline measurement and long-term data collection when I is the current intensity, k is a relative coefficient and w is the coating dry weight per square, and in the actual work, a set of program can be designed according to the formula I, namely kw, so that the current data of the electrochemical workstation 13 is converted into the coating weight data, and the purpose of monitoring the coating weight in real time is achieved.

The invention also provides an on-line monitoring method for the coating quality of the aluminum-plastic film 15, which comprises the following steps,

step 1: preparing an ink distributing roller 10, arranging an insulating area 11 matched with the width of the film surface to be coated of an aluminum plastic film 15 on the circumferential surface of the ink distributing roller 10, wherein the insulating area 11 extends along the axial direction of the ink distributing roller 10, arranging conductive areas 12 on two sides of the insulating area 11, and extending two sides of the film surface to be coated of the aluminum plastic film 15 out of two sides of the insulating area 11 by 1mm respectively during coating;

step 2: smearing and coating evenly, namely smearing the coating liquid on the surface of the aluminum plastic film 15 to be coated evenly through an even ink roller 10, and enabling an insulating area 11 of the even ink roller 10 and conductive areas 12 on two sides of the insulating area 11 to be in contact with the coating liquid on the surface of the aluminum plastic film 15 to be coated;

and step 3: and current detection, wherein an electrochemical workstation 13 is adopted to apply a certain voltage to the conductive areas 12 at two ends of the ink distributing roller 10 in the coating process, a relation curve of the passing current and time is collected and recorded, the change of the current in the relation curve is observed, when the current is lower than a certain value, the coating is judged to be over coating or under coating, in the actual work, the average value of the current is counted according to the relation curve, then the difference value of the real-time current and the average value is judged to judge whether the coating is over coating or under coating, when the coating is over coating or under coating, an alarm device is used for reminding an operator in an acousto-optic mode, and during the current detection, the voltage applied to the conductive areas 12 at two ends of the ink distributing roller 10 by the electrochemical workstation 13 is 3V-20V.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention, so that any modifications, equivalents, improvements, etc. made to the above embodiment according to the present invention are within the scope of the present invention.