JP5011756B2 - Application amount calculation method for dry lamination process - Google Patents

Description

  The present invention relates to an adhesive application amount management method for managing an adhesive application amount by automatically measuring in-line the application amount of an adhesive at the time of film bonding in a dry lamination process by a dry laminating machine, and in particular, bonding. A method for calculating the amount of adhesive applied and the amount used so that the amount of adhesive applied can be managed accurately even when the remaining amount of adhesive is reduced and the adhesive is replenished. It is. In the present invention, the coating amount refers to the amount of adhesive used per unit area.

  Conventionally, in the dry lamination process using a dry laminating machine, the amount of adhesive applied is managed by the operator checking the number of laminate film winding meters and the amount of adhesive used at an appropriate timing. is doing.

  However, such a management method has a problem that the operator's hand is troubled each time, and not only the operation cannot be simplified, but also the coating amount management cannot be performed quickly.

  Therefore, as shown in Patent Document 1, an adhesive application amount management device has been proposed, and the above problems have been solved. That is, in the dry lamination step, the amount of application of the adhesive is managed by calculating the amount of the adhesive based on the number of laminate film meters and the weight of the adhesive from a weighing scale that measures the weight of the adhesive. That is, the amount of adhesive applied in a unit area is calculated using the number of meters in the flow direction of the laminate film in the calculation section and the weight of the adhesive used in the section.

  When calculating the coating amount from the number of laminate film meters and the weight of the adhesive, if the remaining amount of adhesive is reduced and the adhesive is replenished, the change in the weight of the adhesive will be different from the normal amount. It was difficult to calculate. In other words, since the weight of the adhesive increases when the adhesive is replenished, the amount of adhesive used cannot be calculated in the same manner as in the normal case, and an accurate application amount cannot be calculated.

  Therefore, Patent Document 2 proposes a method for determining that the adhesive has been replenished. This method has a function to output whether the weighing state is stable or unstable in the weighing scale, and whether or not the adhesive is replenished based on the elapsed time of the weighing unstable state from the weighing scale and the increased amount of adhesive. Make a decision. When it is determined that the adhesive has been replenished by this method, the start and end positions (number of film meters) of the adhesive replenishment are calculated, and the coating amount is calculated according to the adhesive replenishment pattern.

  However, in this method, the coating amount calculation section is divided into a section where the adhesive is being replenished and a section where the adhesive is not being replenished, and the coating amount is calculated only in the section where the adhesive is not being replenished. The application amount during replenishment of the agent is not reflected in the calculated application amount. Even during the replenishment of the adhesive, the dry laminating machine is operating in the same way as normal, and there is a possibility that an abnormal coating amount may occur. For this reason, it is considered that the same application amount management as in the normal time is required even during the adhesive replenishment.

  In addition, when an adhesive circulation system abnormality occurs, there is a problem that an accurate adhesive application amount cannot be calculated. For example, a rapid change in the line speed of a dry laminating machine may change the amount of adhesive circulated and temporarily increase the amount of adhesive applied. Thus, even when there is an abnormality in the adhesive circulation system, it is considered necessary to calculate a stable coating amount.

Prior art documents are shown below.
JP-A-1-237509 JP-A-5-84831

As described above, in the present invention, even when it is difficult to calculate the adhesive application amount, such as when the adhesive is replenished or when an abnormality occurs in the circulation system of the adhesive, it is stable. It is an object of the present invention to provide a method for calculating a coating amount of an adhesive that enables calculation of a coating amount.
It is another object of the present invention to provide a method for calculating the amount of adhesive used in a stable manner regardless of when the adhesive is replenished.

The invention according to claim 1 is an unwinding step of unwinding the film from the unwinding roller,
Application process of applying adhesive to the film using a roller,
An adhesive circulation step of supplying an adhesive in the sub tank using a pump to the adhesive holding portion in the coating step;
A drying step of drying the adhesive applied on the film by a drying path;
In the method of calculating the amount of adhesive applied in the dry lamination process, which includes a winding process in which another film is bonded and the laminated film is wound with a winding roller.
The winding process has a means for measuring the number of winding meters of the laminate film,
An adhesive weight measuring means for measuring an adhesive weight in the sub-tank in the adhesive circulation step;
The adhesive weight measuring means has a function of outputting of information is increased or adhesive weight in the sub-tank as measured by the weight meter is reduced,
If the adhesive weight is reduced, calculate the amount of adhesive applied from the number of rolls of laminate film and the weight of the adhesive,
When the adhesive weight is increased, the amount of adhesive applied is calculated from the number of laminate film winding meters and the measured value of an infrared film thickness meter installed between the coating process and the drying process. This is a method for calculating the amount of adhesive applied.

  The present invention provides a method for calculating the coating amount using the number of laminate film meters and the weight of the adhesive when controlling the coating amount of the adhesive at the time of film bonding, and the coating amount using an infrared film thickness meter. By properly using the calculation method using the adhesive weight increase judgment, even when there is an abnormality in the adhesive replenishment system or the adhesive circulation system, the application amount can be calculated stably to stabilize the product quality. Can be achieved.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an overall configuration example of an adhesive application amount management apparatus according to the present invention.
In FIG. 1, an adhesive application amount management apparatus according to this embodiment includes a weight meter 1 as a weight measurement means, an infrared film thickness meter 2 as an application amount calculation means, a computer 3, a monitor 4 as a display means, and an output means. It comprises a printer 5 and a keyboard / mouse 6 as input devices. Reference numeral 7 denotes a laminating machine to be managed.

  The weigh scale 1 measures the weight of the adhesive 9 (sub tank 8) and outputs a weight measurement signal. The weighing scale 1 has a function of outputting determination information as to whether the weight of the adhesive is increasing or decreasing.

  The infrared film thickness meter 2 measures the film thickness of the adhesive applied on the film 14. That is, the film 14 is irradiated with infrared rays, the film thickness of the adhesive is calculated from the absorbance of the infrared rays that changes depending on the type of adhesive and the material of the film, and the coating amount and the amount of use are calculated using the number of winding meters of the laminate film. Is calculated.

  The weigh scale 1 and the infrared film thickness meter 2 are installed in the dry laminating machine 7 in the positional relationship as shown in FIG. The adhesive entering the sub tank 8 is pumped up to the adhesive pan 10 by the pump 11 and applied to the film 14 by the roller 12. The adhesive that overflows from the adhesive pan 10 flows into the sub tank 8 again. The weigh scale 1 measures the weight of the sub tank 8 and outputs a weight signal to the computer 3. The infrared film thickness meter 2 calculates a coating amount in which an adhesive is applied to the film 14. The sub tank 8 has an automatic adhesive replenishment function. When the adhesive becomes less than the set value, the adhesive is automatically replenished from the main tank (not shown) to the set value of the sub tank 8. .

  The computer 3 inputs the weight of the adhesive output from the weighing scale 1, and calculates the amount of adhesive applied per unit area based on this and the number of film meters output from the dry laminating machine 7. The coating amount calculated based on the weight information is referred to herein as a weight method coating amount. Further, the coating amount measured by the infrared film thickness meter 2 is input. The coating amount calculated by this infrared film thickness meter is referred to herein as the IR method coating amount. The coating amount calculated by the weight scale 1 and the infrared film thickness meter 2 is output to the monitor 4 and output to the printer 5. Further, it has a function of processing an input signal from the keyboard / mouse 6.

In the present invention, the unwinding step is a step of unwinding the laminate film from the unwinding roller having the unwinding shaft 13.
An application process is a process which has the roller 12 and apply | coats an adhesive agent to a film using a roller.
The adhesive circulation step is a step of having the sub tank 8, the adhesive pan 10, and the pump 11 and circulating the adhesive in the sub tank 8 into the adhesive pan 9.
Although not shown, the drying process is a process of drying the applied adhesive through a drying path.
Although a winding process is not shown, it is a process in which a film is bonded in the form of an adhesive and the bonded product is wound with a winding roller. The number of winding meters of the laminate film is measured by a winding meter counter in the winding process.

  With reference to FIG. 3, the flow of calculating the coating amount of the adhesive coating amount management apparatus configured as described above will be described in detail.

  In the initial setting in step S1, the length a in the width direction of the laminate film is input to the computer 3 by the keyboard / mouse 6, and the type of adhesive and the type of film necessary for calculating the IR method coating amount are used. Is set in the infrared film thickness meter 2.

In step S2, it is determined whether or not the dry laminating machine 7 is in operation. If it is in operation, the weight of the scale 1 is acquired in step S3. Here, the acquired current adhesive weight, the adhesive weight acquired by acquiring the weighing scale information one time before (for example, one second before), and the number of film meters at the time of acquisition are defined by the following variables: The
New Weight Current Adhesive Weight Old Weight Previous Adhesive Weight New Meter Number of Film Meters at Current Adhesive Weight Acquisition Old Meter Current Number of Film Meters at Previous Adhesive Weight Acquisition The current adhesive weight and the number of film meters are determined in step S4. It is displayed on the monitor 4.

In step S5, an adhesive weight increase determination process is performed. Here, the current adhesive weight is compared with the previous adhesive weight to determine whether the current adhesive weight exceeds the previous adhesive weight. That is,
Old Weight <New Weight
If it is, it is determined that the adhesive weight has been increased. In general, the situation where the weight of the adhesive increases is not considered except for the replenishment of the adhesive, but the weight of the adhesive does not decrease constantly due to changes in the line speed of the dry laminating machine or differences in the viscosity of the adhesive. A situation can occur. In this situation, if the application amount by the weight method is calculated, it is considered that the actual application amount is different. For this reason, when it is determined that the weight increase of the adhesive has been performed, the calculation of the coating amount by the gravimetric method is not performed.

  In step S6, the calculation method of the adhesive application amount and the adhesive usage amount is selected according to whether or not the adhesive weight increase is determined. If it is determined that the adhesive weight has increased, the amount of adhesive applied and the amount of adhesive used are calculated using an infrared film thickness meter. On the other hand, when it is not determined that the adhesive weight has increased, the adhesive application amount and the adhesive usage amount are calculated using a scale.

If it is determined that the adhesive weight has increased, the IR method coating amount using the infrared film thickness meter 2 is calculated in step S7. Here, the film coated with the adhesive is irradiated with infrared light, the absorbance specific to the adhesive is measured, and the coating amount is calculated. Further, the obtained IR method coating amount is defined by the following variables.
TofuIR Current IR method application amount Information on the IR method application amount is output to the monitor 4 in step S8.

When the adhesive weight is increased, the amount of adhesive used is calculated by the IR method in step S9. This method will be described. First, the area of the film used in the calculation section is obtained. The amount of adhesive used is calculated by multiplying this by the IR method coating amount. That is,
IR method adhesive usage =
TofuIR × (New Meter-Old Meter) × a
It becomes.

If it is determined in the adhesive weight increase determination that the adhesive weight increase has not been performed, it is determined in step S10 whether or not the number of laminate film meters has reached the calculated number of meters by weight method coating amount. Here, depending on factors such as viscosity, the weight of the adhesive circulating in the sub tank 8, the pump 11, and the adhesive pan 10 may vary, and a situation may occur in which the weight of the adhesive in the sub tank 8 does not decrease constantly. In such a case, when the number of film meters in the calculation section, which will be described later, is short, the amount of adhesive applied and the amount of use in the calculation section vary. The calculated meter number is the number of film meters set in order to eliminate such variations and obtain an average value, and is preferably 100 m or more.
If the calculated number of meters has been reached, it is determined in step S11 whether or not there has been no increase in the adhesive weight in the weight method application amount calculation section. If it is determined that there is no increase in the weight of the adhesive, a gravimetric application amount is calculated in step S12.

This approach, in FIG. 4, the last time, to calculate the adhesive weight W ₁ and the laminate film meter number L ₁ in the measurement point 1 was performed to calculate the weight method applied amount. Similarly, the adhesive weight W ₂ and the laminate film meter number L ₂ at the current measurement point ₂ are calculated.

Laminate film meter number L calculation section _{L = (L 2 - L 1} )
Is calculated by Further, the area S of the film in the calculation section is S = L × a
Is calculated by Further, the amount W of adhesive used in the calculation section is W = (W ₁ −W ₂ )
Is calculated by From the above, the coating amount T is T = W / S.
Is calculated by Here, the calculated application amount is graphically displayed on the monitor 4 in step S13.

Next, in step S14, the amount of adhesive used is calculated. Here, it calculates using the weight of an adhesive agent. That is,
Weight method adhesive use amount = Old Weight-New Weight
It becomes.

  Finally, in step S15, it is determined whether or not all work has been completed, and if completed, the application amount management screen is output to the printer 5 in step S16.

  The above is the flow of calculating the coating amount, but the variables and the like are used for explanation, and may be arbitrary in the actual case.

  As described above, the adhesive application amount management apparatus according to the present embodiment acquires weight information from the weighing scale 1 by the computer 3, and the weight of the adhesive decreases based on the current weight and the weight acquired last time. An adhesive weight increase determination is performed to determine whether the adhesive is in an increased state or an increased state, and an adhesive application amount calculation method and an adhesive usage amount calculation method are selected based on the result.

  As a result of the adhesive weight increase determination, when the adhesive weight is in a reduced state, the change amount of the adhesive weight calculated based on the weight output from the weighing scale 1 and the output from the dry laminator 7 are output. Using the number of laminated film meters, the coating amount is calculated. The amount of adhesive used is calculated from the difference between the current weight and the weight previously acquired.

  On the other hand, when the weight of the adhesive is in an increased state, the coating amount is calculated by the infrared film thickness meter 2, and the coating amount is not calculated by the weight meter 1. Moreover, the usage-amount of an adhesive agent is computed by multiplying the application amount computed with the infrared film thickness meter 2 by the area of the laminate film of a calculation area. Further, the current values of the weight of the adhesive and the amount of adhesive applied are output to the monitor 4 and are output to the printer 5 at the end of production. The above is the configuration of the adhesive application amount management method.

  Therefore, conventionally, in the dry lamination process, the adhesive replenishment pattern is determined from the weighing state of the weigh scale, and the amount of adhesive applied and the amount of adhesive used in the section where the adhesive is not being replenished are calculated. However, by using the infrared film thickness meter 2, it is possible to calculate the coating amount even during adhesive replenishment. As a result, it is possible to improve the accuracy and speed of management of the adhesive application amount, eliminate defective products by early detection of an abnormality in the application amount, and stabilize product quality.

  In the above embodiment, the calculation method of the adhesive application amount and the adhesive usage amount is not limited to the above-described method, and the adhesive application amount and the adhesive usage amount may be calculated by other methods. It can be done.

The block diagram which shows one Example of the adhesive agent coating amount management apparatus by this invention. The figure for demonstrating the installation position of the weight scale and infrared film thickness meter in the Example. The flowchart for demonstrating the effect | action in the Example. The figure for demonstrating the calculation method of the weight method application amount in the Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weigh scale 2 Infrared film thickness meter 3 Computer 4 Monitor 5 Printer 6 Keyboard / mouse 7 Dry laminating machine 8 Sub tank 9 Adhesive 10 Adhesive pan 11 Pump 12 Roller 13 Unwinding shaft 14 Film a The length of the laminated film in the width direction S Area of the film in the calculated section L Number of laminate film meters in the calculated section

Claims (1)

Unwinding process to unwind the film from the unwinding roller,
Application process of applying adhesive to the film using a roller,
An adhesive circulation step of supplying an adhesive in the sub tank using a pump to the adhesive holding portion in the coating step;
A drying step of drying the adhesive applied on the film by a drying path;
In the method of calculating the amount of adhesive applied in the dry lamination process, which includes a winding process in which another film is bonded and the laminated film is wound with a winding roller.
The winding process has a means for measuring the number of winding meters of the laminate film,
An adhesive weight measuring means for measuring an adhesive weight in the sub-tank in the adhesive circulation step;
The adhesive weight measuring means has a function of outputting of information is increased or adhesive weight in the sub-tank as measured by the weight meter is reduced,
If the adhesive weight is reduced, calculate the amount of adhesive applied from the number of rolls of laminate film and the weight of the adhesive,
When the adhesive weight is increased, the amount of adhesive applied is calculated from the number of laminate film winding meters and the measured value of an infrared film thickness meter installed between the coating process and the drying process. A method for calculating the amount of adhesive applied.

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