JPH045534B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a laminate film manufacturing apparatus that uses a two-component adhesive to bond films, and improves the feeding system for the main agent and curing agent. It is something.

[Conventional technology]

In this type of equipment, the base agent and curing agent stored in separate tanks are pumped and mixed.
A laminate film is manufactured by applying the mixture to one film to be laminated using, for example, a roll coater, overlapping another film thereon, and pressing the film with a roll. Such a laminate film manufacturing apparatus is known, for example, from Japanese Patent Application Laid-Open No. 57-15865 and Japanese Patent Publication No. 60-59135.

[Problem that the invention seeks to solve]

Two-component adhesives differ in adhesive strength, viscosity, curing time, etc. depending on the mixing ratio of the main agent and curing agent, and differences in these properties greatly affect web feeding speed and product quality. Therefore, after starting production operation, it is necessary to maintain a stable mixing ratio of the base resin and the curing agent.

In this regard, conventionally there was no means for confirming an appropriate mixing ratio. Therefore, they had no choice but to rely on the precision and reliability of the metering pumps that delivered the base agent and curing agent. Although it is possible to determine the quality of the mixture ratio by inspecting the laminated film in the product state, this confirmation work takes a considerable amount of time (for example, 48
This can only be done after the adhesive has completely cured (after several hours), which caused some frustration that the results could not be reflected on the production line. Of course, the defective laminate films produced during that time had no choice but to be discarded.

Plunger pumps, which have a stable discharge rate, have traditionally been considered to be superior as metering pumps for delivering the base resin and curing agent. However, due to changes in flow path resistance over time in the delivery path after the pump, small leaks, or even abnormalities in the pump itself or valve time lags, the mixing ratio of the base resin and curing agent gradually decreases. It is desirable to be able to manage the mixing ratio with higher reliability.

In devices such as plunger pumps, which rely on a constant discharge volume to maintain a constant mixing ratio, if the mixing ratio changes within the allowable range due to any of the factors mentioned above, It is not possible to return the mixing ratio to a constant ratio by changing the pump discharge amount. Therefore, the operation of the entire production line had to be stopped immediately, and there was a problem in that there was a large economic loss if the pumps etc. were to malfunction.

As mentioned above, in the production equipment for laminating films using two-component adhesives, it is an important issue in production management to continuously maintain the mixing ratio of the base resin and curing agent at a constant rate. A solution was desired.

[Purpose of the invention]

The present invention solves the above-mentioned problems, and allows the mixing ratio of the two-component adhesive to be checked intermittently and adjusted as necessary even after the production operation of the laminate film has started. The purpose of this invention is to obtain a manufacturing device for laminated film.

Another object of the present invention is that even if an abnormality occurs in the main agent and curing agent feeding system, the mixing ratio can be restored to its normal state without stopping the production line, thereby reducing the economical effects caused by abnormalities in the feeding system. The aim is to minimize losses.

[Means for solving problems]

In the present invention, the two-component adhesive B
The mixing ratio of the main agent 14 and the curing agent 15 can be constantly monitored, and at the same time, the feeding amounts of the base agent 14 and the curing agent 15 can be changed, so that the actual flow rate flowing into the mixing device 16 can be adjusted and changed.

Specifically, as shown in FIG. 1, a base agent pump 19 and a hardener pump 2 are provided between the base agent tank 17 and the hardener tank 18 and the mixing device 16, respectively.
The actual flow rates of the main agent 14 and the curing agent 15 are constantly monitored by the flow rate measuring devices 22, 22. Said pump 19・
Reference numeral 20 is composed of a positive displacement rotary pump such as a gear pump or a multi-leaf rotary pump, each of which is driven by a motor 25 via a transmission mechanism 24, and the discharge amount can be adjusted and changed by changing the driving rotation speed. I took it as a thing.

[Effect]

Since each of the pumps 19 and 20 for feeding is a positive displacement rotary pump, there is no pulsation in the discharge flow rate. 22
It can be measured with. Also, each pump 19, 2
Flow measuring device 22, 2 between 0 and the mixing device 16
2 is used to measure the actual flow rate, and the mixing ratio can be accurately determined from the actual flow rates of the main agent 14 and the curing agent 15. If the mixing ratio changes gradually or unevenly, the mixing ratio can be adjusted by operating the transmission mechanism 24 to change the rotational speed of the main agent pump 19 or curing agent pump 20 and correcting the discharge amount. to return to a constant rate.

〔Effect of the invention〕

As explained above, in the manufacturing apparatus of the present invention, the main agent pump 19 and the curing agent 20 are configured by positive displacement rotary pumps, and these pumps 19 and 20 and the mixing device 1
6, the actual flow rates of the main agent 14 and curing agent 15 can be checked intermittently, thereby making it possible to constantly monitor the mixing ratio of the two-component adhesive B in real time. .

In addition, since the drive rotational speed of both pumps 19, 20 can be adjusted by the speed change mechanism 24 and the discharge amount can be corrected at any time, even if an abnormality is found in the mixing ratio by the flow rate measuring devices 22, 22, even if an abnormality is detected in the mixing ratio, By adjusting the discharge amount of the curing agent pump 20, the correct mixing ratio can be restored. Thereby, the mixing ratio of the two-component adhesive B can be continuously maintained at a constant rate, and reliability and productivity can be improved during the production of the laminate film.

Since the discharge rates of the main agent pump 19 and hardener pump 20 can be changed at any time, even if an abnormality occurs in the two-component adhesive B supply system, the mixing ratio can be maintained at a constant rate while the production line is continuously operating. Even in the worst case, the occurrence of product defects can be minimized.

〔Example〕

1 to 4 show an embodiment of a laminate film manufacturing apparatus according to the present invention.

In FIG. 1, the proposed device is an adhesive supply device 1.
, a coating device 3 that applies the two-component adhesive B that will be supplied from now on to the first film 2, and a pair of upper and lower laminating rolls 5 that press the second film 4 onto the first film 2 and bond the films together. ,5
It is equipped with 6 is the completed laminated film.

The coating device 3 is a known roll coater, and consists of four rolls, a backup roll 8, an applicator roll 9, a metering roll 10, and a doctor roll 11, which are arranged in order from the top. An adhesive bank 12 is provided above the adjacent portion of the metering roll 10 and the doctor roll 11, and the adhesive supply device 1 is installed here.
Two-component adhesive B is supplied from. The first film 2 passes between the back-up roll 8 and the applicator roll 9, and the two-component adhesive B stored in the adhesive bank 12 passes through the metal ring roll 10 and the applicator roll 9 to the first film. 2.

The adhesive supply device 1 supplies the main ingredient 14 of the two-component adhesive B.
, a system for supplying the curing agent 15 , a system for supplying the curing agent 15 , and a mixing device 16 that mechanically stirs and mixes the main agent 14 and the curing agent 15 sent from both systems and supplies the mixture to the coating device 3 .

The supply system for the base agent 14 connects the base agent tank 17, the base agent pump 19, and the flow rate measuring device 22 in this order through a pipe line. Similarly, the curing agent 15 supply system connects a curing agent tank 18, a curing agent pump 20, and a flow rate measuring device 22 in this order through a pipe line.

The main agent pump 19 and the curing agent pump 20 are each comprised of a gear pump, which is a type of positive displacement rotary pump, and each can be independently driven to rotate by a motor 25 via a speed change mechanism 24 . As shown in FIG. 2, the speed change mechanism 24 is provided with an operating handle 26, and by rotating the operating handle 26, the driving rotation speed of each pump 19, 20 can be changed. Incidentally, the output rotation speed of the illustrated transmission mechanism 24 can be changed within a range of 10 to 60 rpm. Each pump 19,2
The discharge amount per rotation of 0 is 2.92 cc, the driving rotation range is 13.33 to 80 rpm, and the discharge flow rate can be changed in the range of 38.93 to 233.6 cc per minute equivalent.

As shown in FIG. 3, the flow rate measuring device 22 includes a flow rate display means 27 that displays the flow rate, and a flow rate signal transmitting means 28 that converts the flow rate into a pulsed electric signal, amplifies it, and outputs it. The actual flow rates of the main agent 14 and curing agent 15 fed to the hardening agent 16 are measured in real time.

The flow rate signal transmitting means 28 outputs 1 per 5 c.c.
Send a pulse. This flow rate measuring device 22 is a connecting path 2 between each pump 19, 20 and the mixing device 16.
9, 30, but as much as possible the mixing device 1
6, the actual flow rate can be measured more accurately.

In FIG. 4, the mixing device 16 has a cylindrical main case 32 with an upper and lower lid 33 and a lower lid 34 defining a cold stirring chamber 35 at the top and bottom, and a screw auger-shaped stirring body 36 inside. , three stirring blades 37 arranged at regular intervals are arranged vertically adjacent to each other on the same axis, and an input shaft 38 protruding upward from the stirring body 36 through the upper lid 33 is rotated by a motor 39. Drive. A stirring rod 40 protrudes into the stirring chamber 35 from all sides with the stirring blade 37 sandwiched between the upper and lower sides.

The upper lid 33 has an inlet 41 for the main agent 14 and a curing agent 15.
It has an inlet 42. The lower lid 34 has an outlet 43 for the mixed two-component adhesive B. 44 and 45 are hot water jackets, 46 is the main case 32 and the upper lid 33
47 is a rubber coupling.

The main case 32, the upper lid 33, the lower lid 34, and the stirring body 36 can be easily separated,
This makes it easy to clean the inside.

According to the adhesive supply device 1 as described above,
The actual flow rates of the main agent 14 and curing agent 15 fed to the mixing device 16 can be constantly monitored by the flow rate measuring device 22, and it can be immediately determined whether the mixing ratio of the main agent 14 and curing agent 15 is appropriate. As a result of the determination, if the mixture ratio is inappropriate, the speed change mechanism 24 is operated to change the driving rotation speed of the main agent pump 19 or hardener pump 20 to adjust the discharge amount and restore the mixture ratio to a constant rate. .

Using the output signal from the flow rate signal transmitting means 28 of the flow rate measuring device 22, if the mixing ratio changes beyond the allowable range, or if a tendency thereof appears, this is determined by a logical operation circuit or the like. Alarms are issued by sensory stimuli such as sound and light. In addition, by recording the output signal over time, it is possible to determine not only the mixing ratio of the two-component adhesive B for each manufacturing lot, but also the location of the defect in the laminate film 6 when an abnormality occurs in the mixing ratio. It can also be specified.

[Brief explanation of drawings]

1 to 4 show an embodiment of the laminate film manufacturing apparatus according to the present invention, and
The figure is a front view showing the principle structure of the entire device, Figure 2 is a front view of the adhesive feeding pump and its drive mechanism, Figure 3 is a front view of the flow rate measuring device, and Figure 4 is a longitudinal front view of the mixing device. It is a diagram. B...2-component adhesive, 3...Applying device, 14...
...Main ingredient, 15...Curing agent, 16...Mixing device, 1
7...Base agent tank, 18...Curing agent tank, 19
...Base agent pump, 20...Curing agent pump, 22...
...Flow rate measuring device, 24...Transmission mechanism, 25...Motor, 27...Flow rate display means, 28...Flow rate signal transmission means, 29...Connection path, 30...Connection path.

Claims (1)

[Claims] 1. Main ingredient 14 and curing agent 15 of two-component adhesive B
A main agent tank 17 and a curing agent tank 18 respectively housing the main agent tank 17 and a curing agent tank 18, a main agent pump 19 and a curing agent pump 20 connected to each tank 17 and 18, respectively, and a main agent 14 and a curing agent 15 pumped from both pumps 19 and 20. Both pumps 19 and 20 are positive displacement rotary pumps, and each pump is connected to a motor 25 via a transmission mechanism 24.
, and flow rate measuring devices 22, 22 for measuring the actual flow rates of the main agent 14 and the curing agent 15 are provided in the connection paths 29, 30 between the pumps 19, 20 and the mixing device 16, respectively. Film manufacturing equipment. 2 The main agent pump 19 and the curing agent pump 20 are
The laminate film manufacturing apparatus according to claim 1, which comprises a gear pump. 3 The flow rate measuring devices 22, 22 are the flow rate display means 2
7, and a flow rate signal transmitting means 28 for converting the flow rate into an electric signal and outputting the electric signal.