JP5314604B2 - Coating device and laminating device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply adhesive while suppressing the influence of foreign matter contained in the adhesive. <P>SOLUTION: In an application head 1 provided with a knife edge 2 to supply and apply the adhesive 4 to a moving surface 3a to be applied, a recessed part 5 is provided on the back surface 2a of the knife edge 2 facing a direction opposed to the transporting direction of the surface 3a to be applied. The knife edge 2 is provided on a supply port of a tank storing the adhesive 4 to be supplied and supplying to the surface 3a to be applied while controlling the temperature and the pressure of the adhesive. The knife edge 2 preferably uses a uniformly hardened steel. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus and a laminating apparatus provided with an adhesive coating head, and more particularly, a coating head suitable for a reactive hot-melt adhesive, which is provided with a knife edge to apply an adhesive. The present invention relates to a coating apparatus and a bonding apparatus provided with

  The knife edge is formed on one edge of a plate-like knife member called a doctor knife, knife coater, etc., and is known to apply while regulating the adhesive to be supplied to the moving coated surface to a predetermined coating thickness. (For example, refer to Patent Documents 1 and 2). The ones described in Patent Documents 1 and 2 are for handling solvent-based adhesives, but are switching to reactive hot-melt adhesives due to environmental problems caused by recent solvents (for example, Among them, the knife edge is also used when handling a reactive hot-melt adhesive.

  The present applicant has previously developed a bonding apparatus having a coating head a that handles a reactive hot-melt adhesive d as shown in FIG. As shown in FIG. 5, the coating head a has a knife edge b, and supplies and applies an adhesive d to a moving surface c to be coated. As the laminating apparatus, while the sheet f is conveyed horizontally, the adhesive d is supplied from the coating head a opposed from above and applied under a backup by the coating base g, It is used for pasting. Specifically, the sheet f coated with the adhesive d is folded back so that the coated surface of the adhesive d faces downward and guided under the pressure roller h, and the base material is synchronously conveyed at intervals there between. The sheet f is pressed against the surface of j by the pressing roller h, and both are bonded together. The base material j is, for example, a door material of various storage devices for kitchens, and the door is manufactured by bonding a decorative sheet f.

  The coating head a handles the reactive hot-melt type adhesive d, the reaction-type adhesive d heated and melted as described in Patent Document 3 is stored in a tank and kept in a heated state, and While being prevented from reacting with moisture in the air by the inert gas and being cured, pressurization is applied to the sheet f from the supply port m having the knife edge b, and coating is performed by the knife edge b. The knife edge b presses and applies the adhesive d supplied on the sheet f to be conveyed to the sheet f, and at the same time, regulates to a predetermined coating thickness in cooperation with the coating base g.

Japanese Patent Laid-Open No. 6-256736 Japanese Patent Laid-Open No. 11-165107 JP 2000-296356 A

  Incidentally, a new problem has arisen while the reactive hot-melt adhesive d is handled in an apparatus as shown in FIG. Among them, it is a main problem that foreign matters such as dust contained in the adhesive d supplied to the coated surface such as the sheet f, cured residues generated after the reaction and unreacted substances are applied together with the adhesive d. Yes. In the laminating process in which the sheet f on which these foreign substances are applied together with the adhesive d is bonded to the hard base material j, protrusions due to the foreign substances can be randomly formed on the sheet f on the surface of the base material j depending on the material and thickness of the sheet f. , Cosmetic properties are reduced. Further, in the laminating process in which the sheet f is bonded to another sheet, both of the bonded sheets f may be affected, and depending on the application, there may be a problem other than visual.

A main object of the present invention is to provide a coating apparatus and a laminating apparatus including a coating head that can apply an adhesive with less influence of foreign substances contained therein.

The coating apparatus of the present invention is provided with a knife edge, applied with an adhesive supplied to a moving coated surface, and provided with a recessed portion on the back surface facing the opposite direction of the coated surface of the knife edge A sheet conveying means for coating the adhesive from the coating head with one side of the head as the coated surface while conveying the sheet, and the sheet conveying means, after the sheet is linearly moved toward the application position, It is characterized by having a delivery path which is bent and sent out to the side in pressure contact with the tip of the knife edge.

In such a configuration, the adhesive supplied to the coated surface on which the knife edge moves is pressed against the coated surface and applied, and the coating thickness is restricted by the back surface facing the anti-moving direction side of the coated surface. Adhesives that receive a large amount of adhesive, but foreign matter contained in the adhesive that is supplied to the surface to be coated is provided with a recess on the surface that receives this excessive adhesive, and the coating thickness is regulated by the knife edge. It can suppress flowing out and mixing into the agent layer. In addition, the sheet is bent to the side where it is pressed against the tip of the knife edge in the delivery path after the sheet is moved straight toward the application position by the sheet conveying means, so that the sheet is bonded to the knife edge with its tension. The agent can be pressed and applied with a knife edge, and contamination of foreign matter into the adhesive layer whose coating thickness is regulated can be suppressed. At the same time, as the sheet tries to press-contact the knife edge, the positional relationship with respect to the knife edge is stabilized, and vibration and displacement are suppressed. Thereby, the coating base which backs up the sheet conveyed by the sheet conveying means, which is usually used together with the coating head, at the coating position can be omitted.

Further, when the coating base is used in combination in the coating apparatus of the present invention, the friction between the sheet and the coating base is reduced, the conveyance can be performed smoothly, and the sheet is stably fed toward the coating position. In addition, the adhesive supplied onto the sheet is applied by the knife edge, and the escape of the sheet when the coating thickness is restricted can be suppressed uniformly.

In this case, the sheet conveying means is configured to have a feeding path for feeding the sheet by bending the upstream side of the sheet to be linearly moved along the coating base toward the coating position to the side in pressure contact with the coating base. For example, in the feeding path by the sheet conveying means, the sheet is caused to have its tension by bending the upstream side of the sheet, which is linearly moved toward the coating position along the coating base, to the side pressed against the coating base. By press-contacting to the shoulder of the coating base, the positional relationship with respect to the coating base is stabilized, and vibrations and displacements are suppressed.

In a further configuration with a clearance adjusting means for adjusting the clearance between the coating base and the coating head, the clearance between the coating base and the coating head can be adjusted by the clearance adjusting means to set the optimum clearance for application. .

In addition, it is possible to change the bonding conditions by changing the material and thickness of the sheet, the type of adhesive, etc. by adjusting the sheet feeding angle by bending the sheet to the side pressed against the tip of the knife edge and feeding it. Correspondingly, the delivery angle can be adjusted, and the delivery angle optimum for the bonding conditions can be set.

  The laminating apparatus of the present invention includes any one of the above-described coating apparatuses, and the sheet conveying unit faces the bonding base of the adhesive-coated surface of the sheet to be conveyed downstream of the feeding path from the knife edge of the sheet. A bonding material transporting means for transporting the bonded base material at intervals along the bonding path to be used for bonding to the sheet, and a sheet to the bonded base material in the bonding path. It is characterized in that a pressing roller is provided for pressing and bonding.

In such a configuration, while the sheet is conveyed by the sheet conveying means of the adhesive applied by aforementioned coating apparatus, the adhesive sheet it to sync with the incoming substrate is conveyed at intervals after application The pressing roller can be automatically pressed and bonded to each other continuously, and the pressing roller repeatedly repeats the tension of the falling sheet between the substrates conveyed at intervals, and the upstream of the sheet. Even if the side is pulled or vibrated for a moment, the sheet is bent so as to be pressed against the knife edge by the tension in the delivery path from the application position, and the tension or vibration from the downstream side reaches the application position. It can be stopped at the pressure contact part.

  In addition, it is not necessary to convey a base material at intervals, and even if it conveys continuously, it can bond together stably.

According to the coating apparatus of the present invention, the knife edge is formed by a combination of the sheet that has been linearly moved toward the application position bent to the side in pressure contact with the tip of the knife edge and the concave portion provided in the knife edge. It can apply | coat, suppressing mixing of the foreign material to the adhesive bond layer sent out from the sheet | seat, and can bond the sheet | seat with others in a state with fewer foreign materials. In addition, the sheet has a pressure contact characteristic with the knife edge and the positional relationship with the knife edge is stabilized, and variations in the coating state due to vibrations and displacement including effects from the downstream side are avoided and coating accuracy is improved.

It is a schematic block diagram which shows the coating head which concerns on embodiment of this invention, the coating apparatus using the same, and a bonding apparatus. FIG. 2 is a cross-sectional plan view showing a front shape and a planar shape in the tank showing the periphery of the tank of the coating head of the apparatus of FIG. It is a cross-sectional view of the coating head of FIG. It is a perspective view which shows the supply port part of the coating head of FIG. It is a schematic block diagram which shows the conventional coating head, the coating apparatus using the same, and the bonding apparatus.

  Embodiments of a coating head, a coating apparatus using the coating head, and a bonding apparatus according to the present invention will be described with reference to FIGS. 1 to 4 to provide an understanding of the present invention. The following description is a specific example of the present invention and does not limit the content of the claims.

  As shown in FIG. 1, the coating head 1 of the present embodiment includes a knife edge 2 and supplies and applies an adhesive 4 to a coating surface 3a that moves in a direction indicated by an arrow A. A recessed portion 5 is provided on the back surface 2a of the knife edge 2 facing the work surface 3a in the direction opposite to the moving direction. The knife edge 2 presses and applies the adhesive 4 supplied to the moving coated surface 3a against the coated surface 3a, and regulates the coating thickness t of the adhesive layer 4a to a predetermined value. The regulation of the coating thickness t is excessive when the adhesive 4 supplied onto the surface to be coated 3a is carried on the surface to be coated 3a and is to be sent under the knife edge 2 due to the back surface 2a at the knife edge 2. The adhesive 4 is received or scraped off from the surface to be coated 3a. Therefore, the gap G formed or provided between the coated surface 3a is a main condition for setting the coating thickness t. However, there is also an influence of the viscosity of the adhesive 4 to be supplied and the moving speed of the coated surface 3a. When the recessed portion 5 is provided on the back surface 2 a that receives the excessive adhesive 4 on the knife edge 2, the foreign material contained in the adhesive 4 supplied to the coated surface 3 a is regulated by the knife edge 2 at the coating thickness t. Outflowing into and mixing in the adhesive layer 4a delivered.

  According to the experiments by the present inventors, when the movement of the coated surface 3a is stopped and the bonding is interrupted or stopped, the foreign matter in the adhesive 4 pool formed on the back surface 2a side of the knife edge 2 is detected. Compared with the case where the recessed portion 5 was not provided, the amount of foreign matter was much larger, and it was confirmed that the foreign matter was removed with high probability with respect to the applied adhesive layer 4a. As shown in FIG. 1, the base material 10 in the case where the sheet 3 having the adhesive layer 4a applied to the coated surface 3a is continuously bonded to the base material 10 which is a door material of a storage device for a home kitchen. The percentage of non-defective products viewed at every point reaches 80%. This is 30% of the tank system in which the adhesive is simply supplied from the tank and applied, and the sheet is backed up with a roller from the opposite side of the surface to be coated and the adhesive is supplied to the surface to be coated and applied by the knife edge. This is a significant improvement over 60% of the so-called T-table system that regulates the coating thickness. Moreover, the removal rate of large foreign matters is even higher, and the defective product rate due to the formation of protrusions due to foreign matters on the sheet bonded to the hard member such as the base material 10 by the applied adhesive layer 4a can be significantly reduced. . Therefore, it is suitable for handling the reactive hot-melt type adhesive 4 in which foreign matter due to cured residues or unreacted substances generated after the reaction increases in addition to the contamination of dust. However, the present invention is also effective for other types of adhesives 4 in which dust is mixed or possibly mixed due to the function of removing foreign substances. Further, the decorative sheet 3 is, for example, a resin sheet, but the sheet to which the present invention can be applied includes metal foil, cloth, thin wood shaving material, and the coating head 1 of the present invention is sometimes other than the sheet. The present invention is also effective when applied to all hard materials including the base material 10 and the like.

  The foreign matter accumulated in the recessed portion 5 may be removed by wiping between the work together with the adhesive 4 remaining on the knife edge 2, but in the case of continuous or mass production, a separate mechanical Productivity can be improved by providing the cleaning means.

  In the case shown in FIG. 1, the recessed portion 5 has a groove shape substantially parallel to the tip of the knife edge. As a result, the recessed portion 5 is applied by the knife edge 2 and works in the entire application width of the adhesive layer 4a whose application thickness is regulated, so that foreign matter can be mixed in any part where the coating head applies the adhesive 4. It can be prevented evenly. Accordingly, foreign matters can be reduced throughout the application surface of the adhesive 4. In this sense, it is preferable to provide the groove-like concave portions 5 in a uniform continuous state, but the present invention is not necessarily limited to this, and the width and the concave shape can be changed depending on the portions.

  The recessed portion 5 is assumed to be located at least substantially at the tip 2b of the knife edge 2 as shown in FIG. As a result, the recessed portion 5 effectively acts on the adhesive 4 immediately after the application thickness t is regulated after being applied by the knife edge 2 and the foreign matter removal rate with respect to the delivered adhesive layer 4a can be increased. From this point of view, the recessed portion 5 is preferably closer to the tip 2b of the knife edge 2, but the recessed portion 5 is provided at a position slightly away from the tip 2b in order to prevent wear and damage of the tip 2b of the knife edge 2. . The concave portion 5 is effective as a groove having a triangular section with a depth of about 0.3 mm as shown in FIG. 1 and has a track record of removing foreign matter as described above, but is not limited thereto. For example, a groove, a recess, or the like having a quadrangular shape, a half-moon shape, or a semi-elliptical shape can be considered. It is preferable that the depth of the groove is deeper than 0.3 mm.

  As shown in FIGS. 1, 3 and 4, the knife edge 2 is usually provided at the tip of the plate-like knife member 21, and particularly, it is made of homogeneously hardened steel in which the knife edge 2 is uniformly hardened. Yes. The abrasion resistance of the knife edge 2 is improved by quenching. However, when heating is performed in order to maintain the reaction state using the reactive hot-melt adhesive 4, thermal expansion unevenness is caused if the quenching is not uniform. There is a case where it is distorted and undulated, but by using the homogeneously hardened steel as described above, it is possible to prevent the occurrence of such distortion and cause uneven supply of the adhesive 4 and uneven application. This can be avoided and it is easy to ensure the uniformity of coating. As such a homogeneous quenching material, for example, there is a special steel 55C manufactured by Daido Special Steel Co., Ltd. Even when a decorative sheet is bonded to a door of a storage device for a kitchen, a relatively long coating head 1 is required, and the effect of thermal distortion of the knife edge 2 becomes a problem. However, the problem of uneven application of the adhesive 4 due to thermal strain is solved by adopting homogeneously quenched steel.

  Further, since the knife edge 2 of the present embodiment corresponds to the reactive hot melt type adhesive 4, as shown in FIGS. 2 and 3, the supplied adhesive 4 is stored and its temperature control and back pressure are stored. Is provided at the supply port 13 of the tank 12 that opens the gate 11 to the left and right and supplies it onto the coated surface 3a while adjusting the pressure, and the residual adhesion in the tank 12 as the adhesive 4 decreases toward the supply port 13 It is assumed that the area of the pressure receiving surface 4b in the tank 12 portion of the agent 4 has a volume form that changes. Specifically, the pressure receiving area is increased. As a result, the pressure receiving area is changed according to the decrease in the residual adhesive 4 in the tank 12, that is, is expanded, and the tank 12 is kept at a constant pressure regardless of the decrease in the residual adhesive 4. You can always supply a fixed amount just by keeping. Therefore, the adhesive 4 only needs to be replenished every time the lower limit amount is reached. For this purpose, the lower limit amount of the adhesive 4 is detected by the liquid level sensor 101 provided as shown in FIG. However, the constant supply of the adhesive 4 by maintaining a constant pressure is a condition that the viscosity is stable, and the temperature of the same adhesive 4 needs to be adjusted so that the temperature is kept constant. Therefore, as shown in FIG. 2, the temperature adjusting means 41 and the pressure adjusting means 42 for making the temperature and supply pressure of the adhesive 4 supplied from the coating head 1 constant are provided, and the adhesive is adjusted by adjusting the temperature and pressure. The supply amount of No. 4 is adjusted so as to be almost constant so that a fixed amount can be supplied. In addition, it is necessary to inject the adhesive 4 at a pressure higher than the back pressure. Therefore, an adhesive pressure injection system 56 is connected to the adhesive injection port 32.

  The adhesive 4 is, for example, a polyurethane resin-based reactive hot melt, and exhibits a viscosity of about 10,000 Pa · s / 120 ° C. in a molten state. The temperature of the adhesive 4 in the tank 12 is adjusted so as to stabilize the viscosity. The temperature of the tank 12 is adjusted by the temperature adjusting means 41 so as to be kept uniform at about 120 ° C. For this temperature control, a cartridge heater 31 is provided in each part of the tank 12 for temperature control. In particular, the longer the coating head 1 is, the more easily the temperature varies in the longitudinal direction. To cope with this, the temperature of the central portion and its both side portions are individually adjusted. For this reason, as an example, a lateral cartridge heater 31 embedded in the longitudinal direction of the coating head 1 is formed on the back wall of the tank main body 12a at the adhesive inlet 32 which is an upper portion in the orientation of the coating head 1 as shown. A plurality of layers are arranged in the vertical direction from the side to the lower supply port 13 side so as to suppress the temperature unevenness in the longitudinal direction of the coating head 1, and the coating head 1 is applied to the tank lid 12 b. A plurality of vertical cartridge heaters 31 embedded in the vertical direction perpendicular to the longitudinal direction are embedded in the longitudinal direction of the coating head 1, and the central part of the cartridge heater 31 and the cartridge heaters 31 on both sides thereof are connected to the respective parts. In accordance with the detected temperature monitored by the temperature sensor 43 provided in the apparatus, the current is controlled individually to adjust the temperature. In order to adjust the temperature, the cartridge heater 31 is embedded in the coating head 1 in the illustrated direction vertically from the adhesive injection port 32 side to the lower supply port 13 side. In the figure, the temperature adjusting means 41 individually controls the temperature of the longitudinal cartridge heaters 31 at both ends. However, when both ends of the coating head 1 show the same temperature tendency, the temperature control by them is made common. In that case, one end temperature monitor is sufficient.

  Further, as shown in FIG. 3, the volume form of the tank 12 is such that a wedge-shaped portion 12c having a cross-sectional shape narrowing toward the supply port 13 leads to the supply port 13 through a narrow parallel passage 12d. The sectional shape seen from the front of the shape part 12c is a lighting fixture type as shown in FIG. 2 (a), and the planar shape is a one-side bulging shape in which the back side swells from both ends to the center as shown in FIG. 2 (b). Since the passage 12d leading from the wedge-shaped portion 12c to the supply port 13 is a narrow and parallel passage, the arrangement of the cartridge heater 31 and the temperature caused thereby are satisfied. Coupled with the adjustment, the temperature change of the adhesive 4 between the supply port 13 and the supply port 13 is suppressed as much as possible to reach the supply port 13 while ensuring the viscosity as set, so that the supply can be stably performed.

  On the other hand, the pressure adjusting means 42 supplies an inert gas supply system 45 for supplying an inert gas 44 such as dry air or nitrogen gas to the tank 12 at a constant pressure or higher to fill the back of the adhesive 4, and a supply to the tank 12. And a constant pressure holding valve 46 that exhausts the excess pressure of the inert gas 44 to be supplied. The tank 12 is filled with the inert gas 44 having a pressure equal to or higher than the constant pressure, and the tank 12 is exhausted with a constant pressure. The inert gas is renewed while maintaining the temperature. As a result, by utilizing the fact that the pressure receiving area changes as described above in accordance with the decrease in the residual adhesive 4 in the tank 12, the internal pressure in the tank 12 is kept constant regardless of the decrease in the residual adhesive 4. It is always possible to supply a fixed amount simply by keeping the At the same time, the inert gas 44 is supplied to the tank 12 at a constant pressure or higher by ensuring that the excess pressure of the inert gas 44 to be filled is exhausted by the constant pressure holding valve 46 so that the inert gas 44 is renewed into the tank 12. In the unlikely event that air enters or is generated, it can be expelled early, and the adhesive 4 can be reliably prevented from reacting with moisture in the air and being cured. The constant pressure holding valve 46 is preferably a precision relief valve, which allows the tank 12 to be maintained at a constant pressure with a high accuracy of ± 0.1%. However, the back pressure is as high as about 80 kg / cm 2 corresponding to the high-viscosity adhesive 4, for example, and a pressure safety valve 55 is connected to the tank 12 to ensure safety so that an abnormal pressure can be released. ing. Further, the liquid level sensor 101 is a pencil type which is installed sideways, and even if the adhesive 4 has a high viscosity, the lower limit amount can be accurately detected without any harmful effects caused by dripping.

  Further, as shown in FIGS. 3 and 4, the coating head 1 is provided at a plurality of positions in the longitudinal direction through the pressing member 111 on the back surface 2 a of the knife edge 2 which is adjusted in height and screwed to the front surface of the tank lid 12 b. Opening and closing of the supply port 13 and adjustment of the opening width are performed by opening and closing the gate 11 which is pressed by the screw 112 and the gap is adjusted, and the gap is stretched by pressing through the pressing member 111 of the gate 11. The balance between preventing the agent 4 from entering the gap around the gate 11 and smooth opening and closing is achieved. Although such a mechanism is well known and will not be described in detail, the coating head 1 of the present embodiment has an adhesive in the tank 12 particularly at the upper end facing the supply port 13 of the gate 11 as shown in FIG. The back pressure A received through the agent 4 generates pressing component forces A1 and A2 that are pressed against both the back surface 2a of the knife edge 2 and the pressing end portion upper surface 111a of the pressing member 111 that are substantially perpendicular to each other. Further, the pressure receiving surface 11a is inclined with respect to both the back surface 2a and the pressing end portion upper surface 111a. Thus, the gate 11 presses the back surface 2a of the knife edge 2 and the gate 11 with the back pressure A acting on the pressure receiving surface 11a at the upper end portion via the adhesive 4 in the range where the supply port 13 is closed. Upon receiving the pressing component forces A1 and A2 pressed against the pressing end portion upper surface 111a of the member 111, the pressing force is applied to the back surface 2a and the pressing end portion upper surface 11a, and the adhesive 4 enters more than the gap adjustment state and enters the outside. There is no leaking gap, and in the closed state of the gate 11, this state extends over the entire area of the supply port 13, and the supply port 13 can be firmly closed, and the pressing component forces A 1 and A 2 are not mechanical forces but the gate 11. The open / close resistance is never increased. Moreover, the gate 11 has an equal thickness portion 11b pressed by the pressing surface 111b at the tip of the pressing member 111 parallel to the back surface 2a of the knife edge 2, and the gate 12 is pressed to the back surface 2a of the knife edge 2 by the pressing member 111. Thus, in order to secure the gap adjustment state, a component force that causes the gate 11 to escape or move in the other direction due to the pressing force of the pressing member 111 is not generated, and therefore, the gate 11 is pressed by the pressing component forces A1 and A2. The crimping state to the back surface 2a and the pressing end portion upper surface 111a is stabilized, and a complicated mechanical force is not exerted on the gate. As a result, the equal thickness portion 11b of the gate 11 can be made thin and sufficient durability can be obtained, and the delivery port width B of the adhesive at the supply port 13 can be reduced. As an example, a good result was obtained in which it was easy to stably supply the adhesive 4 corresponding to the coating thickness t of the adhesive layer 4a by reducing it to about 2 mm. In addition, the back side of the gate 11 forms a concave surface corresponding to the convex surface of the pressing member 111 with the upper surface 111a and the pressing surface 111b of the pressing member 111. The pressure receiving surface 11a has an arrow-shaped cross section that rises obliquely upward toward the back surface 2a of the knife edge 2. On the other hand, the pressing member 111 has a slight gap 121 with respect to the pressure receiving surface 11a from the rear end of the convex-shaped surface and covers an appropriate width, and then is connected to the edge of the supply port 13 formed by the tank body 12a. Therefore, it is possible to prevent the adhesive 4 from reaching between the concave and convex mold surfaces without affecting the opening and closing of the gate 11 by the gap 121, thereby further preventing the adhesive 4 from leaking.

  As shown in FIG. 1, the coating apparatus according to the present embodiment includes the coating head 1 described above and the adhesive 4 from the coating head 1 with the coated surface 1a as a coated surface 3a while conveying the sheet 3. The sheet conveying means 51 includes a delivery path 51a for feeding the sheet 3 straightly toward the application position and then bending the sheet 3 to the side in pressure contact with the tip 2b of the knife edge 2. It is assumed that In this way, the sheet 3 is bent to the side in pressure contact with the tip of the knife edge 2 as shown in FIG. 1 in the delivery path 51a after the sheet 3 is moved straight by the sheet conveying means 51 to the application position. 3 presses the adhesive 4 in an attempt to press the knife edge 2 with its tension, and further suppresses foreign matter from flowing out and mixing into the adhesive layer 4a applied by the knife edge 2 and having a coating thickness t regulated. be able to. At the same time, the sheet 3 tries to press-contact with the knife edge 2, so that the positional relationship with respect to the knife edge 2 is stabilized, and vibration and displacement are suppressed. Thereby, the coating base 52 as shown in FIG. 1 which backs up the sheet 3 conveyed by the sheet conveying means 51 at the application position is not essential. However, when the coating base 52 is used in combination, the friction between the sheet 3 and the coating base 52 is reduced, the conveyance can be performed smoothly, and the sheet 3 can be stably fed toward the coating position. In addition, the adhesive 4 supplied onto the sheet 3 is applied by the knife edge 2, and the escape of the sheet 3 when the coating thickness is regulated can be suppressed uniformly. Here, the sheet 3 is pressed against the coating head 1, the application pressure of the adhesive 4 and the uniform application of the adhesive 4 by the correlation between the clearance S between the coating head 1 and the coating base 52, Smooth delivery is ensured. The bending angle of the sheet 3 by the delivery path 51a is preferably 14 ° or more, and more preferably around 25 ° with respect to the adhesive 4.

  Further, the guide roller 113a in the delivery path 51a is movable up and down, and the bending angle of the delivery path 51a of the sheet 3 can be changed by moving the guide roller 113a, and the material and thickness of the sheet 3 can be changed. In addition, the optimum bending angle of the delivery path 51a can be selected in response to a change in the bonding condition due to a change in the type of the adhesive 4 or the like.

  Further, as shown in FIG. 1, the sheet conveying means 51 may have a horizontal normal carry-in route indicated by a virtual line on the upstream side of the sheet 3 that moves straight toward the application position along the coating base 52. In the present embodiment, as shown by the solid line, there is a feeding path 51b that is bent and fed to the side in pressure contact with the coating base 52. As a result, the upstream side of the sheet 3 that is linearly advanced toward the application position along the coating base 52 is bent and fed to the side in pressure contact with the coating base 52 in the feeding path 51b by the sheet conveying means 51. Thus, the sheet 3 is pressed against the shoulder of the coating base 52 with its tension, so that the positional relationship with respect to the coating base 52 is stabilized, and vibration and displacement are suppressed.

  Further, the backup surface 52a of the coating base 52 is usually chrome-plated or the like, but the resin sheet 3 sometimes generates meandering or vibration due to friction or catching. Therefore, in the present embodiment, the friction reduction process for reducing the friction with the sheet 3 is applied to the backup surface 52a of the coating base 52. As an example, a fluororesin may be coated, and the coating can be suitably performed by a spray coating method. By this fluororesin coating, the sheet 3 receives the guidance of the coating base 52, and is reduced in friction and catching with the coating base 52 when it is sent to the coating position and sent from the coating position. 3 meandering, displacement, and vibration can be prevented.

  Moreover, the coating apparatus of this Embodiment is provided with the clearance adjustment means 53 which adjusts the clearance S between the coating base 52 and the coating head 1, as shown in FIG. The clearance adjusting means 53 may be, for example, a screw. By adjusting the clearance S between the coating base 52 and the coating head 1 by using the clearance adjusting means 53, the optimum clearance S for application is provided. Can be set and realized. Further, since the sheet 3 often meanders, the meandering is corrected, or the opening position of the gate 11 is adjusted by the opening / closing mechanism unit according to the meandering position. In this embodiment, the sheet being conveyed is conveyed. As a sensor for detecting the edge position of 3 and detecting the presence and position of meandering, it receives reflected light polarized by 90 °, for example, when projected toward a polarizing reflector disposed across the conveyance path of the sheet 3 Thus, the position of the light-shielding edge by the sheet 3 is detected, so that erroneous detection due to the influence of ambient light can be eliminated.

Further, the laminating apparatus according to the present embodiment includes the coating head 1 and a coating apparatus using the coating head 1, and the sheet conveying means 51 is provided on the feeding path 51 a of the sheet 3 from the knife edge 2. Downstream, the sheet 3 to be conveyed has an adhesive path 51c that faces the bonded base material 10 with the adhesive applied surface, and the bonded base material 10 is conveyed at intervals along the adhesive path 51c. 3 and a pressing roller 62 for pressing the sheet 3 to the bonding substrate 10 in the bonding path 51c for bonding. Thus, the adhesive 4 is applied by the characteristic coating head 1 and the coating apparatus using the same as described above while the sheet 3 is conveyed by the sheet conveying means 51, and the sheet 3 after the adhesive application is synchronized with this. Then, pressing and bonding to the base material 13 conveyed at intervals by the pressing roller 62 can be performed automatically and continuously, and the pressing roller 62 is bonded at intervals. The sheet 3 is repeatedly pulled between the substrates 10 and tensioned for a moment, and the upstream side of the sheet may be pulled or vibrated for a moment. It is bent so as to come into pressure contact with it, and it is possible to stop the tension and vibration from the downstream side from reaching the application position at the pressure contact part, and the application state of the adhesive 4 Horizontal stripes there is no influence of, or the like can.

  In addition, the sheet 3 after being bonded to the bonding substrate 10 is provided with a cutting means 63 for cutting the sheet 3 after bonding to the bonding substrate 10 before and after the bonding substrate 10 or between the substrates 13. 3 can be automatically cut into the base 13 unit by the cutting, and even if the cutting at this time causes a pull or vibration on the upstream side of the sheet 3, it reaches the coating position. Can be stopped at the pressure contact portion of the sheet 3 to the knife edge 2 in the same manner as described above.

  As shown in FIG. 1, the sheet conveying means 51 includes a driving roller 114, a pressing roller 62, guide rollers 113, 113a, and a tension roller 113b. The driving roller 114 and the pressing roller 62 include the sheet 3 and the base material. 10, and the sheet 3 and the substrate 10 are simultaneously driven by the driving roller 114, so that the sheet 3 is conveyed through the various conveying paths. In particular, the coating head is formed by the tension roller 113 b. The tension of the sheet 3 conveyed to 1 is made constant.

  INDUSTRIAL APPLICABILITY The present invention can be practically used for laminating processing in which sheets are bonded to a base material and laminating processing in which sheets are bonded together, and the influence of foreign matters mixed in an adhesive for bonding can be reduced.

DESCRIPTION OF SYMBOLS 1 Coating head 2 Knife edge 3 Sheet | seat 3a Coated surface 4 Adhesive 4a Adhesive layer 4b Pressure receiving surface 5 Recessed part 10 Bonding base material 11 Gate 12 Tank 13 Supply port 31 Cartridge heater 41 Temperature adjusting means 42 Pressure adjusting means 43 Sensor 44 Dry Air 45 Inert Gas Supply System 46 Constant Pressure Holding Valve 51 Sheet Conveying Means 51a Delivery Route 51b Feeding Route 51c Adhesive Route 56 Adhesive Pressurizing Injection System 52 Coating Base 53 Clearance Adjusting Means 61 Bonding Material Conveying Means 62 Pressure Clamping Roller 63 Cutting means 111 Pressing member

Claims (6)

A coating head provided with a knife edge, coated with a supply of adhesive on a moving coated surface, and provided with a recessed portion on the back surface facing the anti-moving direction side of the coated surface of the knife edge;
A sheet conveying means for conveying an adhesive from the coating head while conveying the sheet as one surface side to be coated;
The sheet conveying means has a feeding path for feeding the sheet straightly toward the coating position and then bending and feeding it to the side in pressure contact with the tip of the knife edge. A coating head provided with a knife edge, coated with a supply of adhesive on a moving coated surface, and provided with a recessed portion on the back surface facing the anti-moving direction side of the coated surface of the knife edge;
A sheet conveying means for supplying the adhesive by the coating head while conveying the sheet as one surface side to be coated;
A coating base for backing up the sheet conveyed by the sheet conveying means at the application position;
The sheet conveying means has a delivery path for feeding the sheet straightly toward the coating position and then bending and feeding the sheet to the side in pressure contact with the knife edge. The sheet conveyance means has a feeding path for bending and feeding the upstream side of the sheet to be linearly moved toward the coating position along the coating base to the side pressed against the coating base. Coating equipment. The coating apparatus according to claim 2, further comprising a clearance adjusting unit that adjusts a clearance between the coating base and the coating head. The coating apparatus according to any one of claims 1 to 4, further comprising an angle adjusting unit that adjusts an angle at which the sheet is bent and fed to a side press-contacted with the tip of the knife edge. The coating apparatus according to any one of claims 1 to 5, wherein the sheet conveying means is attached to the base material with the adhesive application surface of the sheet to be conveyed downstream of the feeding path from the knife edge of the sheet. A bonding material conveying means for conveying the bonded base material along the bonding path to be used for bonding to the sheet, and pressing the sheet to the bonded base material in the bonding path; A laminating apparatus comprising a pressure roller for bonding.

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