JP2007021394A - Die head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die head capable of being easily assembled and disassembled and further capable of being assembled with suppressing variation of the gap side of a slit gap to a restricted small value and being assembled with an excellent reproducibility of assembling. <P>SOLUTION: The die head is so configured that a first die block 12 and a second die block 13 are put on a flat attracting surface 14a of a permanent magnetic chuck 14, each mating face of the first die block and the second die block is mated at that position, an attracting switch 25 of the permanent magnet chuck 14 is activated to make attract and hold the first block and the second block so as to unite as a whole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention applies a coating liquid to an object to be coated such as a web or a plate in a color filter manufacturing process, an organic EL element manufacturing process, a fuel cell manufacturing process, a photomask manufacturing process, a packaging material manufacturing process, and the like. The present invention relates to a die head used for the purpose.

  Conventionally, a die head is placed opposite to a running web (object to be coated), and the coating liquid is discharged from the die head in a film form and applied onto a support table such as a surface plate. Coating in which a die head is placed opposite and placed on a placed plate or sheet (object to be coated), and the coating liquid is moved relative to the plate or sheet while being discharged from the die head in the form of a film. The device is known. As shown in FIGS. 7 and 8, the die head 1 used in this type of coating apparatus includes a first die block 2 and a second die block 3, and the first die block 2 and the second die block 3. Respectively have gap wall surfaces 2a and 3a for forming the slit gap 4, and mating surfaces 2b and 3b for abutting and assembling each other, and one die block 2 has a manifold 5. The two die blocks 2 and 3 are integrated by joining the mating surfaces to each other and fastening them together by bolts 6 arranged at a plurality of locations spaced in the coating width direction, and between the gap wall surfaces 2a and 3a. A slit gap 4 for discharging the coating liquid is formed.

  In the die head 1 of this structure, the gap wall surfaces 2a and 3a and the mating surfaces 2b and 3b of the die blocks 2 and 3 are processed with high precision, and the die blocks 2 and 3 are combined with the mating surfaces 2b and 3b, By tightening and assembling each bolt 6 with a constant torque, the gap dimension d of the slit gap 4 formed between the gap wall surfaces 2a and 3a is set to a predetermined value. However, even if all the bolts 6 are tightened at a constant torque, the tightening applied to the die blocks 2 and 3 depends on the state of the bolt, the length, the state of the thread of the female thread cut on the die block 2 side, and the like. The applied force changes, and the die blocks 2 and 3 may be deflected unevenly due to the bolt fastening, resulting in variations in the gap dimension d of the slit gap 4 in the coating width direction, which is difficult to make uniform. there were. It was also difficult to obtain reproducibility of assembly. It is not impossible to adjust by changing the fastening torque of each bolt so that the gap dimension is constant, but in the case of adjustment of this method, the fastening torque is extremely larger than the appropriate torque. Or, small things may occur, which may cause problems such as deterioration of die head quality and liquid leakage. In the case of a wide die head, the number of bolts provided in the width direction is several tens, which imposes a heavy burden on operations such as cleaning.

  Conventionally, as means for correcting variations in the slit gap dimension, a fine adjustment of the slit gap by means of a plurality of adjustment bolts provided in the coating width direction of the die head to achieve uniformization, or a plurality of hydraulic units provided in the coating width direction It is known that a pressure is applied to the slit portion to deflect the slit portion to make the slit gap uniform (see Japanese Patent No. 3501159).

However, the fine adjustment of the slit gap with the adjusting bolt is difficult to finely adjust in the micron order because the adjustment amount depends on the pitch of the thread on the male screw side. Fine adjustment of the slit gap by the hydraulic unit can be made in a short time and in the micron order, but it can be adjusted only in the direction of narrowing the slit gap. In addition, the hydraulic unit has a drawback that it does not have complete pressure reproducibility due to reassembly and is vulnerable to temperature changes.
Japanese Patent No. 3501159

  The present invention has been made in view of such problems, and can easily disassemble and assemble the die head, and can be assembled with a small variation in gap size of the slit gap, and can be reproducible. Another object is to provide an excellent die head.

  In order to solve the above-mentioned problems, the present invention comprises a gap wall surface for forming a slit gap and a mating surface for assembling each other, and when the mating surfaces are combined with each other, they are applied between the gap wall surfaces. A state in which at least one of the first die block and the second die block configured to form a slit gap for discharging the working liquid is attracted and held by the permanent magnet chuck, and the first die block and the second die block are combined. It is set as the structure hold | maintained. In the present specification, the permanent magnetic chuck includes a permanent electromagnetic chuck that requires energization only during the attachment / detachment operation.

  Here, as a form in which the first die block and the second die block are held in combination using the permanent magnet chuck, a planar shape capable of attracting and holding the first die block and the second die block on the permanent magnet chuck is used. The suction surface can be provided, and the suction surface can be sucked and held in a state where the first die block and the second die block are combined.

  As another form of holding the first die block and the second die block in a combined state using a permanent magnet chuck, one of the first die block and the second die block is attracted and held on the permanent magnet chuck. There may be a configuration in which an attracting surface is provided, the permanent magnet chuck is fixed to one of the first die block and the second die block, and the other is attracted and held on the attracting surface of the permanent magnet chuck.

  The die head of the present invention is a state in which one or both of the first die block and the second die block are attracted and held on the attracting surface of the permanent magnet chuck so that the mating surfaces of the first die block and the second die block are brought into contact with each other. Therefore, the first die block and the second die block do not have excessive deflection as in the case of fastening with bolts, and the first die block and the second die block are processed with high accuracy. It can be assembled with the same accuracy, the gap dimension of the slit gap formed between the first die block and the second die block can be set to a predetermined value, and the variation in the coating width direction can be It can be made smaller than when fastening. Moreover, since it can assemble with the same precision for every assembly, it is excellent in reproducibility. Thus, by using the die head of the present invention, high quality and stable coating can always be performed. In addition, since assembly and disassembly can be performed simply by turning on and off the adsorption switch of the permanent magnet chuck, it is extremely simple, greatly reducing the work load and greatly shortening the work time.

  1 is a schematic perspective view showing a die head according to a preferred embodiment of the present invention with an end plate disassembled, FIG. 2 is a schematic perspective view of a part of a permanent magnet chuck used in the die head, and FIG. FIG. 4 is an exploded perspective view of the die head, and FIG. 4 is a schematic end view of the die head shown with the end plate removed. The die head generally designated by reference numeral 11 includes a first die block 12 and a second die block 13, a permanent magnet chuck 14 for attracting and holding the first die block 12 and the second die block 13, and ends disposed at both ends. Plates 15 and 15 are provided.

  Each of the first die block 12 and the second die block 13 includes gap wall surfaces 12a and 13a for forming the slit gap 17, mating surfaces 12b and 13b for assembling each other, and an attracting surface 14a for the permanent magnet chuck 14. The die blocks 12 are provided with a manifold 18. Further, the die blocks 12 have a manifold 18. The gap wall surface 13a and the mating surface 13b formed on the second die block 13 are located on the same plane, but the gap wall surface 12a and the mating surface 12b formed on the first die block 12 are the mating surface. Steps are provided so that a slit gap 17 having a predetermined gap dimension d is formed between the gap wall surface 12a and the gap wall surface 13a when assembling 12b with the mating surface 13b of the second die block 13. Yes. The attracted surfaces 12c and 13c of the first die block 12 and the second die block 13 are finished to be smooth surfaces so as to be favorably attracted by the permanent magnet chuck 14. Further, the gap wall surfaces 12a and 13a, the mating surfaces 12b and 13b, and the attracted surfaces 12c and 13c of the first die block 12 and the second die block 13 are each machined with high precision so as to ensure high precision flatness. Thus, the first die block 12 and the second die block 13 are placed on a flat surface having a high degree of flatness (for example, on the attracting surface 14a of the permanent magnet chuck 14), the attracted surface 12c, The slit gap 17 having a predetermined gap dimension d and small variation in the coating width direction can be formed by placing the 13c in contact with each other and butting the mating surfaces 12b and 13b. The first die block 12 and the second die block 13 are made of a material that is adsorbed by the magnetic force of the permanent magnet chuck 14, such as martensitic stainless steel (SUS403, SUS410, etc.) or austenitic stainless steel (SUS304, etc.). ing.

  The permanent magnet chuck 14 attracts and holds an object by the magnetic force of a permanent magnet, and reciprocates between a main body 21 containing a magnet and an iron core, a face plate 22 that forms an attracting surface 14a, a separator 23, and a magnetic pole 24. An adsorption switch 25 and the like for turning on and off the magnetic force for the attachment / detachment operation by rotating are provided. The suction surface 14a is a smooth and high-precision flat surface so that the first die block 12 and the second die block 13 can be satisfactorily sucked and held, and both can be held at a predetermined position with high accuracy. In addition, the first die block 12 and the second die block 13 are formed to have a size capable of supporting the entire surfaces to be attracted 12c and 13c. Further, the separator 23 on the attracting surface 14a of the permanent magnet chuck 14 is disposed in a direction orthogonal to the coating width direction of the die head, thereby increasing the amount of contact with the first block 12 and the second die block 13. Good adsorption force can be obtained, and the adsorption force in the coating width direction can be made uniform. It is preferable to make the pitch of the magnetic poles 24 as small as possible, because it can increase the attracting force and make the attracting force uniform in the coating width direction.

  A screw hole 26 for fixing the end plate 15 is formed on the end face of the first die block 12, the second die block 13 and the permanent magnet chuck 14, and a bolt hole 27 is formed in the end plate 15. Yes.

  Next, a method for assembling the die head 11 having the above configuration will be described. The permanent magnet chuck 14 is placed on a stone surface plate (not shown), and the first die block 12 and the second die block 13 are placed facing each other on the attracting surface 14a of the permanent magnet chuck 14, and FIG. As shown in FIG. 2, the mating surfaces 12b and 13b of the two are brought into a state of being closely abutted. As a result, a slit gap 17 having a predetermined gap dimension d and small variation in the coating width direction is formed between the gap wall surfaces 12 a and 13 a of the first die block 12 and the second die block 13. Next, in this state, the adsorption switch 25 of the permanent magnet chuck 14 is rotated to the ON position using a dedicated tool (not shown). As a result, the first die block 12 and the second die block 13 are attracted and held by the permanent magnet chuck 14 by magnetic force, and the first die block 12 and the second die block 13 are in contact with each other's mating surfaces 12b and 13b. It will be fixed. After that, the assembly is completed by fixing the end plates 15 to both ends using bolts.

  The die head 11 assembled as described above is attracted and held on the attracting surface 14a of the permanent magnet chuck 14 with the first die block 12 and the second die block 13 abutting each other's mating surfaces 12b and 13b. Therefore, the first die block 12 and the second die block 13 are not distorted as in the conventional case when they are fastened with a large number of bolts. The gap dimension d of the slit gap 17 formed between the two die blocks 13 is the same as the processing accuracy, and the gap dimension d can be made extremely uniform in the coating width direction. Moreover, the same precision is obtained for every assembly, and the assembly reproducibility is excellent. Furthermore, since the permanent magnet chuck 14 is attracted using the magnetic force of the permanent magnet, heat generation and accuracy change due to heat do not occur during use. Thus, by applying using the die head 11, highly accurate and stable application can be performed.

  In the embodiment shown in FIGS. 1 to 4, the attracting surface 14 a of the permanent magnet chuck 14 has the same size as the attracted surfaces 12 c and 13 c of the first die block 12 and the second die block 13. It can be increased or decreased within a range that does not hinder the adsorption and retention, and it is preferable to use a slightly larger area. That is, since the attracting force of the attracting surface 14a of the permanent magnet chuck 14 tends to decrease in the peripheral region, the permanent magnet chuck 14 having the attracting surface 14a whose length and / or width is several millimeters to several tens of millimeters. By using the first die block 12 and the second die block 13, it is possible to apply a more uniform suction force to the entire suction surfaces 12 c and 13 c of the first die block 12 and increase the assembly accuracy.

  Furthermore, in the above embodiment, the first die block 12 and the second die block 13 are both attracted and held on the attracting surface 14a of the permanent magnet chuck 14. However, the present invention is not limited to this and the permanent magnet is not limited thereto. The chuck may be fixed to one of the first die block 12 and the second die block 13 in advance by an appropriate fixing means such as a bolt or an adhesive, and only the other is attracted and held by the permanent magnet chuck. 5 and 6 show an embodiment in that case. The die head 11A according to this embodiment also includes the first die block 12A, the second die block 13A, and the permanent magnet chuck 14A. The permanent magnet chuck 14A used here attracts only the second die block 13A. The holding surface 14Aa that can be held is provided. The first die block 12A has a cross-sectional shape longer than that of the second die block 13A, and a permanent magnet chuck 14A is fixed to a lower end region of the first die block 12A with a fixing means (not shown) such as a bolt or an adhesive. It can be fixed. In assembling the die head 11A having this configuration, the permanent magnet chuck 14A is fixed to the first die block 12A in advance, and in this state, the second die block 13A is placed on the attracting surface 14Aa of the permanent magnet chuck 14A. The first die block 12A and the second die block 13A are assembled by closely abutting the mating surfaces 12b and 13b of the one die block 12A and the second die block 13A and turning the attracting switch 25 of the permanent magnet chuck 14A to the ON position. be able to. Also in this case, the second die block 13A can be fixed at a fixed position with respect to the first die block 12A by attracting and holding the second die block 13A with the permanent magnet chuck 14A. The slit gap 17 can be formed with good accuracy according to processing accuracy, and with a predetermined gap dimension d and small variation in the coating width direction.

  In the above embodiment, the permanent magnet chucks 14 and 14A are configured to perform the on / off operation by mechanically rotating the adsorption switch 25, but the present invention is not limited to this. You may use the permanent electromagnetic chuck of the structure which performs ON / OFF operation | movement by supplying with electricity. The permanent electromagnetic chuck needs to be energized when it is turned on / off, but since the magnetic force of the permanent magnet is used during the adsorption holding, heat generation and accuracy change due to heat do not occur during use. For this reason, even a die head using a permanent electromagnetic chuck can stably perform high-quality coating.

  The above-described embodiments are for explaining the present invention, and do not limit the present invention. It goes without saying that the present invention can be variously modified within the scope of the claims.

The schematic perspective view which shows the die head which concerns on suitable embodiment of this invention in the state which decomposed | disassembled the end plate Schematic perspective view of a permanent magnet chuck used in the die head shown in FIG. 1 is an exploded perspective view of the die head shown in FIG. Schematic end view showing the die head shown in FIG. 1 with the end plate removed The schematic end elevation which shows the die head which concerns on other embodiment of this invention in the state which removed the end plate FIG. 5 is an exploded end view of the die head shown in FIG. Schematic sectional view of a conventional die head A schematic exploded perspective view of a conventional die head

Explanation of symbols

11 Die head 12, 12A 1st die block 13, 13A 2nd die block 12a, 13a Gap wall surface 12b, 13b Mating surface 12c, 13c Adsorbed surface 14, 14A Permanent magnetic chuck 14a, 14Aa Adsorbed surface 15 End plate 21 Main body 22 Face plate 23 Separator 24 Magnetic pole 25 Suction switch 26 Screw hole 27 Bolt hole

Claims (3)

  Each has a gap wall for forming a slit gap and a mating surface for assembling each other, and a slit gap for discharging the coating liquid between the gap wall surfaces when the mating surfaces are combined with each other. A first die block and a second die block having a configuration to be formed; and a permanent magnet chuck that holds and holds at least one of the first die block and the second die block in a combined state. Die head characterized by   The die head according to claim 1, wherein the permanent magnet chuck has a flat suction surface for sucking and holding the first die block and the second die block.   2. The die head according to claim 1, wherein the permanent magnet chuck is fixedly provided on one of the first die block and the second die block, and has an attracting surface for attracting and holding the other.

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