JP2002178336A - Mold, method for manufacturing the same and substrate molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold capable of forming a groove or recessed place to the single surface of a substrate for a reversible image display medium or the like in a desired shape, dimension and arrangement with good surface accuracy and capable of being accurately manufactured simply and inexpensively, a method for manufacturing the mold and a substrate molding method. SOLUTION: The mold 10 for molding the single surface of the substrate having grooves on its single surface includes plural kinds of blocks A, W, P and B having molding surface parts for molding a part of the surfaces constituting the single surface having the grooves of the substrate and providing a molding surface 10a for molding the single surface of the substrate by combining the molding surface parts. The blocks A, W, P and W are combined so as to form the molding surface 10a for molding the single surface of the substrate by the molding surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for molding a substrate or other substrate constituting an image display medium, the substrate having a groove or a recess on one surface, particularly a substrate having a fine groove or a recess. And a method for manufacturing the same, and a method for forming such a substrate.

[0002]

2. Description of the Related Art Taking an image display medium as an example, today's image display is performed by manually writing characters, figures, etc. on an image display medium such as paper using a pencil, pen, paint, or the like, or using a computer or word processor. Documents, graphics, and the like created by such methods are displayed on a display such as a CRT display, or output and displayed on a medium such as paper by a printer.

Further, a document, a figure, or the like, which is manually created on a medium such as paper, or a document, a figure, or the like on a medium such as paper output by a printer is printed on another medium such as paper using a copying machine or the like. In some cases, a copy is made, or transmitted by a facsimile machine or the like, and copied and output on a medium such as paper at a transmission destination.

[0004]

Among these image displays, characters, characters and the like are displayed on an image display medium such as paper using a pencil, a pen or the like.
Image display for displaying graphics, etc., and image display for displaying characters, graphics, etc. on an image display medium such as paper by an image forming apparatus such as a printer, copier, facsimile machine, etc. using an electrophotographic system, ink spraying system, thermal transfer system, etc. Then, a clear image can be displayed at a high resolution, and the image is easy to see when viewing the image.

However, it is not possible to repeat image display and image deletion on an image display medium such as paper. When writing letters and the like using a pencil, the letters and the like can be erased to some extent with an eraser, but if the letters etc. are thinly written, they will be completely erased if they are written with normal darkness. It is difficult to leave, and it is difficult to reuse a medium, such as paper, on which an image has been displayed, unless the image is also displayed on the back side of the medium on which an image has not been displayed.

[0006] Therefore, a medium such as paper on which an image is displayed is discarded or incinerated after it has been used up, and a lot of resources are consumed. In printers and copiers, consumables such as toner and ink are also consumed. Further, in order to obtain a display medium such as new paper, toner, ink, and the like, resources such as a medium and energy for manufacturing the medium are further required. This is contrary to the demand for environmental load reduction required today.

In this regard, in the image display on a display such as a CRT display, image display and image deletion can be repeated. However, the image displayed on the display has a lower resolution than the image displayed on a paper or the like by a printer or the like, and there is a limit to obtaining a clear and fine image. Since the resolution is low, it is not suitable for displaying a text document mainly composed of characters. A sentence or the like that fits into about one screen is still good, but a sentence or the like that continues over a plurality of screens is difficult to read and sometimes difficult to understand. In addition, eyes are very apt to be tired in long-term visual work due to relatively low resolution and light emission from the display.

As an image display method capable of repeating image display and image deletion, electrophoretic display (EP
D) and twisted ball type display (TBD) have been proposed. More recently, the method introduced in "Japan Hardcopy '99 Transactions PP249-252" has been proposed.

In the electrophoretic display method, a sealed space is formed by arranging two substrates, at least one of which is transparent, at an interval with a spacer interposed therebetween to form a sealed space, in which particles having electrophoretic ability are formed. It is filled with a display liquid dispersed in a dispersion medium of a different color, and displays images in the color of the particles or the color of the dispersion medium by migrating particles in the display liquid in an electrostatic field. is there.

Such a display liquid is usually composed of a dispersion medium such as isoparaffin, fine particles such as titanium dioxide, a dye for imparting color contrast with the fine particles, a dispersant such as a surfactant, and additives such as a charge imparting agent. Is done.

However, in this electrophoretic display,
Since the contrast between the high refractive index particles (inorganic pigment) such as titanium dioxide and the insulating colored liquid is displayed, the degree of concealment of the colored liquid is inevitably low, and the contrast is reduced.

Furthermore, the types of dyes that can be dissolved in a high-concentration nonpolar solvent at a high concentration so as to enable electrophoresis of particles are limited. No black dye is known. Therefore, the background part is inevitably colored, and it is difficult to make the background part white and improve the contrast. When white particles for forming an image are put in the colored liquid, the colored liquid may enter between the substrate and the white particle layer moved to the image observation side substrate, or the colored liquid may be mixed between the white particles. And the contrast is reduced. Also, the resolution of the electrophoretic particles is low because it is difficult for the particles to be uniformly attached to the image observation side substrate.

Further, since the specific gravity difference between the particles and the dispersion medium in the display liquid is very large, and the particles are likely to settle and agglomerate,
The display contrast tends to decrease, and it is difficult to display images stably for a long period of time, and the previous display afterimage tends to occur. Further, the charging of the particles in the liquid greatly changes with time, and in this respect, the image display stability is also poor.

The twisting ball type display method holds a large number of microcapsules in which microspheres treated so that the half and the other half of the surface show different colors or optical densities together with an insulating liquid inside. Using an image display medium, a microsphere in the microcapsule is rotated by an electric field or a magnetic force to display an image in a predetermined color.

However, in this twisted ball type display, an image is displayed with microspheres in an insulating liquid in the microcapsules, so that it is difficult to obtain a good contrast, and in particular, resolution is low because a gap is formed between the microcapsules. . It is difficult to reduce the size of the microcapsule in order to improve the resolution in manufacturing the capsule.

"Japan Hardcopy '99 Transactions PP249
The image display method introduced in 252252 ”is a method in which two substrates each having an electrode and a charge transport layer laminated thereon are opposed to each other at a predetermined interval to form a sealed space, in which a conductive toner and a conductive toner and a conductive toner are formed. Insulating particles having different colors are enclosed, an electrostatic field is applied to charge and charge the conductive toner, and the conductive toner is moved by Coulomb force to display an image.

However, in the image display method utilizing the charge injection phenomenon, when the charge-injected conductive toner moves,
Insulating particles (for example, white particles that are put together to obtain the background color) hinder the movement of the conductive toner, and some toners stop moving. As a result, sufficient image density and contrast cannot be obtained, and the image display speed decreases. In order to solve this problem, high voltage driving is required. Also, the resolution is limited to the resolution determined by the electrodes. In addition, it is essential to employ an electrode, a charge injection layer, and a conductive toner, and there is a limitation in manufacturing.

In order to solve the above-mentioned problems, (1) image display and image erasure can be repeatedly performed as compared with such a conventional image display medium, so that an image such as paper related to the conventional image formation can be obtained. It is possible to reduce the use of consumables such as a display medium, a developer, an ink, and the like, and to respond to the reduction of environmental load today. (2) It is possible to display a high-contrast, high-quality image. ) High-resolution, high-quality images can be displayed. (4) Images can be displayed stably for a long period of time. (5) Afterimages are hardly generated, and therefore, good reversibility is exhibited, and high-quality images are displayed. (6) High-speed image display, (7) Low drive voltage for image display, etc. Reversible painting Display medium has been proposed. That is, two substrates facing each other with a predetermined gap, one or two or more developer storage cells formed between the two substrates and surrounded by a partition wall, and included in each of the cells. And a dry developer containing at least two types of triboelectrically-chargeable dry developing particles having different charging polarities and different optical reflection densities from each other. It is a reversible image display medium.

This reversible image display medium forms an electrostatic field corresponding to an image to be displayed on the developing particles in a state where the developing particles contained in each cell in the image display medium are triboelectrically charged. Thereby, the developing can be performed by moving the developing particles by Coulomb force, and an image can be displayed.

The electrostatic field corresponding to the image to be formed can be obtained by providing electrodes on each of the medium constituting substrates, applying a voltage corresponding to the image to be formed between the electrodes, or applying an image to be formed on one of the substrates. Can be formed by forming an electrostatic latent image corresponding to.

Further, such a reversible image display medium is provided with two substrates facing each other with a predetermined gap therebetween, and one or two substrates formed between the two substrates and surrounded by a partition wall.
It has the above-mentioned developer accommodating cells and a dry developer contained in each of the cells, and the dry developers have different charging polarities and different optical reflection densities (another wording). In this case, at least two types of dry-developed particles having a triboelectric property are included.

Therefore, even after the image is displayed once, the image can be erased by applying a different electrostatic field, applying an alternating electric field, or applying an oscillating magnetic field when magnetic developing particles are contained, An image can be rewritten by applying a different electrostatic field. Therefore, there is no need to discard the image display medium on which the image has been displayed. Further, the developing particles are included in the cell, and therefore, there is no need to supply the developer from outside. As a result, the use of conventional image display media, such as paper, related to image display, and consumables, such as a developer, can be greatly reduced.

Further, unlike the conventional electrophotographic image formation, it is not necessary to dissolve and fix the toner on a sheet such as paper by heat, and the image forming energy required for this type of conventional image formation is unnecessary. Can save most.

Thus, it is possible to respond to today's environmental load reduction.

According to the reversible image display medium, the developer contained in the cell contains at least two types of developing particles having different optical reflection densities, and the developing particles are dry developing particles. Since the degree of hiding of the other type of developing particles by one type of developing particles is good, an image can be displayed with good contrast.

The developer contained in the cell contains at least two kinds of mutually frictionally chargeable dry developing particles having mutually different charging polarities. When an image is displayed, the developer is charged to the opposite polarity by friction charging. Since the particles move under the Coulomb force, the particles are easy to move, and in this respect, the image can be displayed with good contrast, the afterimage of the previous display hardly occurs, the image can be displayed at a high speed, and further, low voltage driving is possible. .

Dry developing particles are less likely to settle and agglomerate because they do not involve a liquid, as compared with, for example, electrophoretic particles in a display liquid used for electrophoretic image display as described above. A decrease in contrast is unlikely to occur, and a long-term stable image display can be performed. Since the sedimentation and aggregation of the developing particles hardly occur, the afterimage of the previous display hardly occurs. Further, since dry development particles have less change over time in charging performance than particles in a liquid, stable image display can be performed for a long time in this respect as well.

In addition, compared to the conventional image display using a CRT display or the like, an image can be displayed with high resolution and easily to the eyes.

As for the production of such a reversible image display medium, as one method, a substrate having a groove or a concave portion serving as a precursor of the developer accommodating cell is formed on one surface, and the substrate is formed in the groove or the concave portion of the substrate. After storing a predetermined amount of the dry developer, another
A method in which a single substrate is covered therefrom and fixed to form cells having cells containing the dry developer can be given.

However, the grooves or recesses on one side of one substrate for accommodating the developer may be finely formed to suppress unnecessary movement of the developer within the substrate. As desired, it is actually very difficult to form a substrate having such fine grooves and recesses.

The following method can be generally considered as a method for manufacturing one side of the substrate or a substrate having a concave / convex portion including a groove or a recess on one side. 1) A predetermined uneven portion is formed directly on a flat substrate material by mechanical processing. 2) A mask having a predetermined pattern of openings is laminated on the surface of the flat substrate material, the substrate material is etched through the openings of the mask by an etching process, and then the mask is removed to obtain an uneven portion. 3) Using a mold such as a mold, the substrate material is molded under, for example, heat and pressure to obtain an uneven portion.

However, the method 1) of mechanical processing and the method 2) of etching are not practical because of the high substrate manufacturing cost.

On the other hand, the molding method 3) is excellent in cost, but also has the following problems. In other words, when forming an uneven substrate used for a reversible image display medium by molding, for example, in order to mold the uneven substrate, a concave portion for molding a convex portion of the substrate and a groove or a concave portion of the substrate are formed. A mold having a convex portion formed on the surface is required.

In general, in die processing for forming a die, for example, a die is formed by directly processing a die material with a large tool using a machining center, an electric discharge machine or the like. When processing and forming a mold having a portion, it is necessary to process and form an uneven portion with a very small tool. In this case: 1. The shape of the groove or recess is not stable; 2. The machining surface accuracy of the surface that constitutes the groove or recess is poor. There are problems such as a long processing time for forming grooves and recesses. Further, 4. 4. When taper processing is required to extract the formed substrate from the mold, the taper processing is extremely difficult. Release processing of a coating (for example, coating of a fluoro resin such as polytetrafluoroethylene, release plating coating, etc.) for improving the releasability of the mold when the formed substrate is removed from the mold. Is difficult to form in a minute area such as a corner of a concave portion of a mold, and therefore, there is a problem that the releasability becomes unstable.

Therefore, the present invention relates to a molding die for molding one surface of a substrate for a reversible image display medium or the like having a groove or a recess on one surface, wherein the groove or the depression is formed on one surface of the substrate. Even if it can not be said that it is a fine groove or recess, even if it is a fine groove or recess, the surface shape of the surface on which the groove or recess is formed with a desired shape, size and arrangement is good It should be able to be easily formed at a low cost with high precision, and should have a tapered surface at a predetermined portion or be subjected to a release treatment at a predetermined portion. In this case, it is another object of the present invention to provide a molding die that has the tapered surface with high precision and / or can be easily and inexpensively manufactured in a state where the release processing is performed well.

The present invention also relates to a method for producing a molding die for molding one surface of a substrate for a reversible image display medium or the like having a groove or a recess on one surface, the method comprising: Even if the groove or recess is not a fine groove or recess, even if it is a fine groove or recess, the desired shape,
With the dimensions and arrangement, it is possible to easily and inexpensively and accurately manufacture a molding die capable of molding with good surface accuracy of the surface on which the groove or the recess is formed. Even when a tapered surface should be provided or a predetermined portion should be subjected to a release treatment, the tapered surface should be provided with high accuracy and / or An object of the present invention is to provide a method of manufacturing a molding die that can easily and inexpensively produce a molding die in a state where the molding is performed.

Further, the present invention relates to a method for forming a substrate for a reversible image display medium or the like having a groove or a recess on one side, wherein the groove or the recess on one side of the substrate is formed by a fine groove or a recess. Even if it is not a place, even in the case of a fine groove or recess, a substrate forming method capable of forming a surface having the desired shape, dimensions and arrangement with a desired surface accuracy with a desired shape, dimensions and arrangement. The task is to provide.

[0038]

SUMMARY OF THE INVENTION The present invention provides the following molding die, its manufacturing method, and substrate molding method. (A) Molding die This is a molding die for molding one side of a substrate having a groove on one side, and is used for molding a part of a surface constituting one side of the substrate having the groove. A plurality of types of blocks having a mold surface portion, including a plurality of types of blocks that provide a mold surface for forming one surface of the substrate by combining the mold surface portions of each block, and the plurality of types of blocks are included. A molding die that is combined to form a mold surface for molding one surface of the substrate with those mold surface portions.

According to this molding die, each of the mold surfaces for molding one surface of the substrate has a plurality of mold surfaces for molding a part of the surface constituting the one surface of the substrate having the substrate groove. It is formed by combining different types of blocks.

Each type of block is individually or collectively divided into blocks of the same type, independently of other types of blocks, using a large blade or the like, easily, in a short time, efficiently, inexpensively, and accurately. Can be manufactured well. In addition, if necessary, the predetermined portion can be easily formed on a highly accurate tapered surface. If necessary, a predetermined part can be satisfactorily subjected to a mold release treatment. Only by combining a plurality of types of blocks manufactured in this way, the accuracy of each part can be obtained well.

Thus, the grooves or recesses on one side of the substrate can be formed in a desired shape, size and arrangement regardless of whether the grooves or recesses are not minute grooves or recesses or not. It can be molded with good surface accuracy of the surface forming the recess, and the whole mold can be manufactured easily and inexpensively with high accuracy. Even when a predetermined portion should be subjected to a mold release treatment, it is possible to manufacture the tapered surface accurately and / or easily and inexpensively in a state where the mold release treatment is performed well. it can. (B) A method for producing a molding die A method for producing a molding die for molding one surface of a substrate having a groove on one surface, each part of a surface constituting one surface of the substrate having the groove. A step of forming a plurality of types of blocks having a mold surface portion for forming a mold surface portion, and providing a mold surface for molding the one surface of the substrate by combining the mold surface portions of each block,
Combining the plurality of types of blocks so as to form a mold surface for molding one surface of the substrate with their mold surface portions.

According to the method of manufacturing a molding die, the mold surface on which one surface of the substrate is molded is a mold surface portion for molding a part of the surface constituting the substrate single surface having the substrate groove. Are formed by combining a plurality of types of blocks having

Each type of block is formed independently of other types of blocks individually or collectively for each type of block prior to such a block combination.
Therefore, blocks of each type can be manufactured individually, or collectively for each block of the same type, easily, efficiently, inexpensively, and accurately using a large blade or the like. In addition, if necessary, the predetermined portion can be easily formed on a highly accurate tapered surface. If necessary, a predetermined part can be satisfactorily subjected to a mold release treatment. By simply combining a plurality of types of blocks manufactured in this way, a molding die with good accuracy in each part can be obtained.

Thus, the grooves or recesses on one side of the substrate can be formed into a desired shape, size and arrangement regardless of whether the grooves or recesses can be said to be fine grooves or recesses or not. A molding die capable of molding with good surface accuracy of the surface forming the recess can be manufactured easily and inexpensively with high accuracy, and even if the die should have a die-cutting tapered surface in a predetermined portion. Or, even when the release treatment should be performed on a predetermined portion, having the tapered surface with high accuracy,
Further, (or) a molding die in which the mold release treatment has been performed well can be simply and inexpensively manufactured. (C) Substrate Forming Method This is a method of forming a substrate having a groove or a concave portion on one side, wherein a step of mounting a transfer-moldable substrate material sheet having a predetermined thickness on a support surface of a support base; Pressing the molding die according to the present invention (A) at a predetermined molding temperature and pressure on the substrate material sheet placed on the substrate, or when the shape of the molding die permits, perform the molding. Pressing the mold under predetermined molding temperature and pressure and rolling relative to the substrate material sheet to transfer the mold molding surface shape to the substrate material sheet.

According to the substrate forming method of the present invention,
Even if the groove or recess on one side of the substrate is not a fine groove or recess, even if it is a fine groove or recess, the groove or recess is formed in a desired shape, size and arrangement. The surface to be formed can be molded with good surface accuracy.

The above-mentioned predetermined molding temperature in the molding of the substrate is, for example, such that the supporting table on which the substrate material sheet is placed and / or the molding die are used to circulate the heater or the heating fluid above the glass transition point of the substrate material sheet. And heated. The following (1) to (9) can be given as specific examples of the molding die and the method of manufacturing the same according to the present invention. (1) First molding die and its manufacturing method a. A first molding die is a molding die for molding one surface of a substrate having a plurality of grooves on one surface, and each molds a part of a surface constituting the one surface of the substrate having the groove. A plurality of types of blocks each having a mold surface portion for providing a mold surface for forming one side of the substrate by combining the mold surface portions of the respective blocks, and including the plurality of types of blocks. The block includes a first block having a mold surface portion for molding the inner bottom surface of the groove and both inner surfaces rising from the inner bottom surface on the one surface of the substrate, and an intermediate wall between adjacent grooves on the one surface of the substrate. A second block having a mold surface portion for molding a top surface, and a plurality of grooves of the substrate,
A third block having a mold surface portion for forming a top surface of an outer wall portion aligned with the groove located at one end; and an outer wall portion aligned with the groove located at the other end of the plurality of grooves of the substrate A mold surface portion for molding a top surface of the first,
A fourth block capable of fitting and arranging second and third blocks, wherein the first and second blocks are alternately fitted into the fourth block, and the first and last blocks are first and last.
The block is fitted, and the third block is fitted next to the last first block.
A molding die in which the second and third blocks are pressed and fixed to the fourth block by a block fixing device to form a die surface for molding one surface of the substrate. b. A first method for producing a molding die A method for producing a molding die for molding a single surface of a substrate having a plurality of grooves on one surface, each of the surfaces constituting a single surface of the substrate having the groove. A plurality of types of blocks having a mold surface portion for molding a part thereof are formed, and a plurality of types of blocks providing a mold surface for molding one side of the substrate are formed by combining the mold surface portions of the respective blocks. And a step of assembling a molding die having a mold surface for molding the one surface of the substrate by combining the plurality of types of blocks, wherein the block forming process includes the inner bottom surface of the groove on the one surface of the substrate. Forming a first block having a mold surface portion for forming both inner side surfaces rising from the inner bottom surface; and forming a first block for forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate. Mold part Having a second
A step of forming a block, and a step of forming a third block having a mold surface portion for forming a top surface of an outer wall portion aligned with a groove located at one end of the plurality of grooves of the substrate. A mold surface portion for forming a top surface of an outer wall portion aligned with a groove located at the other end of the plurality of grooves of the substrate, and the first, second, and third blocks are fitted therein. Forming a disposable fourth block, wherein in the molding die assembling step, the first and second blocks are alternately fitted into the fourth block, and at the beginning and end, The first block is fitted and the third block is fitted next to the last first block, and the first, second and third blocks are pressed and fixed to the fourth block to form one surface of the substrate. Mold with a Mold Surface Mold manufacturing method of assembling.

In this first molding die and its manufacturing method, one first block is used and the second block is not used, so that one side of the substrate having one groove on one side can be used. A molding die for molding and a method for producing the same can be provided. (2) Second molding die and its manufacturing method a. The second molding die is a molding die for molding one surface of a substrate having a plurality of grooves on one surface, and each molds a part of a surface constituting one surface of the substrate having the groove. A plurality of types of blocks each having a mold surface portion for providing a mold surface for forming one side of the substrate by combining the mold surface portions of the respective blocks, and including the plurality of types of blocks. The block has a first inner surface of the groove, a first inner surface rising from the inner bottom surface, and a mold surface portion for forming the inner inner surfaces rising from the inner bottom surface.
A second block having a mold surface portion for forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate; and a second block having an outer peripheral wall surrounding a plurality of grooves of the substrate. A third block having a mold surface portion for forming a top surface of an outer peripheral wall portion aligned with a groove located at one end of the plurality of grooves, and an outer peripheral wall surrounding the plurality of grooves of the substrate; A fourth block having a mold surface portion for forming a top surface of the remaining portion, wherein the first, second, and third blocks can be fitted and arranged, and the first and second blocks can be attached to the fourth block. 2 blocks are inserted alternately, and the first block is inserted first and last, and the third block is inserted next to the last first block, and the first, second, and third blocks are inserted. Is pressed and fixed to the fourth block by the block fixing device Mold the mold surface is formed for molding the substrate one side is. b. A second method for manufacturing a molding die is a method for manufacturing a molding die for molding one surface of a substrate having a plurality of grooves on one surface, each of which is a surface forming one surface of the substrate having the groove. A plurality of types of blocks having a mold surface portion for molding a part thereof are formed, and a plurality of types of blocks providing a mold surface for molding one side of the substrate are formed by combining the mold surface portions of the respective blocks. And a step of assembling a molding die having a mold surface for molding the one surface of the substrate by combining the plurality of types of blocks, wherein the block forming process includes the inner bottom surface of the groove on the one surface of the substrate. Forming a first block having both inner side surfaces rising from the inner bottom surface and a mold surface portion for molding both inner end surfaces rising from the inner bottom surface; and an intermediate wall between adjacent grooves on one surface of the substrate. of Forming a second block having a mold surface portion for forming a top surface, and an outer peripheral wall surrounding a plurality of grooves of the substrate;
Forming a third block having a mold surface portion for molding a top surface of an outer peripheral wall portion aligned with a groove located at one end of the plurality of grooves of the substrate; Forming a fourth block having a mold surface portion for molding the remaining top surface of the outer peripheral wall surrounding the groove, and into which the first, second, and third blocks can be fitted and arranged. In the molding die assembling step, the first and second blocks are alternately fitted into the fourth block, and the first block is first and lastly fitted into the last first block. The third block is fitted side by side, and the first, second and third blocks are pressed and fixed to the fourth block to assemble a molding die having a die surface for molding one surface of the substrate. Mold manufacturing method.

In the first and second molding dies, it is preferable that the first block has a mold surface portion for molding the inner surface of the substrate groove formed as a tapered surface for punching. .

In the first and second methods of manufacturing a molding die, in the first block forming step, a die surface portion for molding the inner surface of the substrate groove of the first block is used for punching. Preferably, it is formed on a tapered surface.

In the second molding die and the method of manufacturing the same, the first block is made one and the second block is not used, so that one side of the substrate having one groove on one side is provided. And a method for manufacturing the same. (3) Third molding die and its manufacturing method a. A third molding die, which is a molding die for molding one surface of a substrate having recesses on one surface in a grid pattern, wherein the first or second molding die is A molding die in which a block is formed in a block so as to form an intermediate wall between the adjacent recesses in a direction transverse to the first block in a direction along the first block in the transverse direction. b. A third method of manufacturing a molding die is a method of manufacturing a molding die for molding one surface of a substrate having recesses in a grid pattern on one surface, the method comprising:
Alternatively, in the second method for manufacturing a molding die, an intermediate wall in the transverse direction between the adjacent recesses in a direction along the first block is formed in the first block in a direction crossing the first block. Manufacturing method of a molding die for forming a groove for forming.

The transverse groove of the first block may be formed by further processing the molding die obtained by the first or second molding die manufacturing method, or by forming the first block. It may be formed in a process.

In the third molding die and the method of manufacturing the same, the first block is formed as one piece and the second block is not used, so that the concave portion is formed on one side in one direction (the first block). The present invention can provide a molding die for molding one surface of a substrate having a plurality of substrates along the direction, and a method for manufacturing the same. (4) Fourth molding die and its manufacturing method a. The fourth molding die is an injection molding die for injection-molding a substrate having a groove or a recess on one side, and the molding die of (A) or the first, second, or third molding die. An injection mold including a molding mold and an opposing mold that is combined with the mold to form a cavity for molding the substrate. b. A fourth method for producing a molding die A method for producing a molding die for injection-molding a substrate having a groove or a recess on one surface, the method for producing a molding die according to (B) or the fourth method. For injection molding, a molding die obtained by the first or second or third molding die manufacturing method is combined with an opposing die which is combined with the die to form a cavity for molding the substrate. A method for producing a mold for injection molding to obtain a mold. (5) Fifth molding die and its manufacturing method a. Fifth molding die An extrusion molding die for extruding a substrate having a groove on one surface, the molding die of (A) or the first or second molding die, An opposing mold that is combined with the mold to form a die for extruding the substrate. b. Fifth Method of Manufacturing a Mold This is a method of manufacturing a molding die for extruding a substrate having a groove on one surface, and the method of manufacturing a molding die of (B) or the first or second method. The mold for extrusion is obtained by combining the mold for molding obtained by the method for manufacturing a mold for mold 2 with an opposing mold which is combined with the mold to form a die for extrusion molding of the substrate. A method of manufacturing an extrusion molding die. (6) Sixth molding die and its manufacturing method a. Sixth molding die A molding die for molding one surface of a substrate having a plurality of grooves on one surface, each molding part of a surface constituting one surface of the substrate having the groove. A plurality of types of blocks each having a mold surface portion for providing a mold surface for forming one side of the substrate by combining the mold surface portions of the respective blocks, and including the plurality of types of blocks. The block includes a first circular block having an inner bottom surface of a groove on one surface of the substrate and a mold surface portion for molding both inner surfaces rising from the inner bottom surface, and an intermediate wall between adjacent grooves on the one surface of the substrate. A second circular block having a mold surface portion for molding a top surface of the substrate, and a mold for molding a top surface of an outer wall portion aligned with a groove located at one end of the plurality of grooves of the substrate. A third circular block having a surface portion;
A fourth circular block having a mold surface portion for molding a top surface of an outer wall portion aligned with a groove located at the other end of the plurality of grooves of the substrate, wherein the first, second, and fourth circular blocks are provided. And a fourth circular block in which a shaft portion for externally fitting the third circular block is provided. The first and second circular blocks are provided on a shaft portion in which the fourth circular block is provided. The first circular block is externally fitted at the beginning and the end alternately at the through hole provided, and the third circular block is provided at the third circular block adjacent to the last first circular block. The first, second and third circular blocks are pressed and fixed to a fourth circular block by a block fixing device to form one side of the substrate. A molding die on which a mold surface is formed.

In this molding die, it is desirable that the first circular block has a die surface portion for molding the inner side surface of the substrate groove formed as a tapered surface for punching. b. A sixth method of manufacturing a molding die is a method of manufacturing a molding die for molding one surface of a substrate having a plurality of grooves on one surface, each of which is a surface forming a single surface of the substrate having the groove. A plurality of types of blocks having a mold surface portion for molding a part thereof are formed, and a plurality of types of blocks providing a mold surface for molding one side of the substrate are formed by combining the mold surface portions of the respective blocks. And a step of assembling a molding die having a mold surface for molding the one surface of the substrate by combining the plurality of types of blocks, wherein the block forming process includes the inner bottom surface of the groove on the one surface of the substrate. Forming a first circular block having a mold surface portion for molding both inner surfaces rising from the inner bottom surface; and forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate. Mold surface Forming a second circular block having a portion, and a third circular shape having a mold surface portion for forming a top surface of an outer wall portion aligned with a groove located at one end of the plurality of grooves of the substrate. A step of forming a block, and a fourth circular block having a mold surface portion for molding a top surface of an outer wall portion aligned with a groove located at the other end of the plurality of grooves of the substrate, Forming a fourth circular block in which a shaft portion for externally fitting the first, second, and third circular blocks is formed. The first circular block and the second circular block are alternately fitted to a shaft protruding from the circular block through through holes provided therein, and the first circular block is firstly and lastly fitted with the first circular block. Fit outside and next to the last first circular block The third circular block is externally fitted in a through hole or a recess provided in the third circular block, and the first, second and third circular blocks are pressed and fixed to a fourth circular block to form one surface of the substrate. For producing a molding die having a die surface for molding.

In the first circular block forming step, it is preferable that a die surface portion for forming the inner surface of the substrate groove of the first circular block is formed as a tapered surface for die cutting.

In the sixth molding die and the method of manufacturing the same, the number of the first circular block is one and the second circular block is not used, so that the substrate having one groove on one surface can be formed. A molding die for molding one surface of a substrate and a method for manufacturing the same can be provided. (7) Seventh molding die and its manufacturing method a. A seventh molding die is a molding die for molding one surface of a substrate having recesses in a grid pattern on one surface, wherein the first circular block is formed in the sixth molding die. Forming a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction along the first circular block in a direction transverse to the first circular block. b. A seventh method of manufacturing a molding die is a method of manufacturing a molding die for molding one surface of a substrate having recesses in a grid pattern on one surface, the method comprising:
In the method for manufacturing a molding die according to the above, the intermediate wall in the transverse direction between the adjacent recesses in the direction along the first circular block is formed on the first circular block in a direction crossing the first circular block. Manufacturing method of a molding die for forming a groove for forming.

The groove in the transverse direction of the first circular block may be formed by further processing a die obtained by a method of manufacturing a sixth molding die, or in the first circular block forming step. It may be formed.

In the seventh molding die and the method of manufacturing the same, the first circular block is one and the second circular block is not used, so that the recess is formed on one side in one direction (the first circular block). (A direction of a circular block), a molding die for molding one surface of the substrate having a plurality of substrates, and a method of manufacturing the same.

In any of the molding dies described above, at least a part of the molding material contact surface of at least one of the plurality of types of blocks may be subjected to a release treatment for the molding material. .

In any of the above-described methods for manufacturing a molding die, in the block forming step, at least a part of the molding material contact surface of at least one of the plurality of types of blocks is separated from the molding material. A pattern processing may be performed.

Examples of the release treatment include coating with a fluorine resin such as polytetrafluoroethylene, release plating coating, and the like. (8) Eighth molding die and its manufacturing method a. Eighth molding die A molding die for molding one surface of a substrate having a plurality of grooves on one surface, the molding die having a circular cross section and an inner bottom surface and both inner surfaces of the substrate groove. A band-shaped member having a cross-sectional shape corresponding to the cross-sectional shape of the groove,
A molding die in which the belt-shaped member is spirally wound around the outer peripheral surface of the roll having a circular cross section at a pitch to obtain an interval between adjacent substrate grooves.

A spiral groove is formed on the outer peripheral surface of the circular cross-section roll so as to fit and fix the band-shaped member so as to obtain the interval between the adjacent substrate grooves. The band-shaped member is fitted and fixed in the spiral groove. You may. b. An eighth method of manufacturing a molding die is a method of manufacturing a molding die for molding one surface of a substrate having a plurality of grooves on one surface, wherein a step of forming a roll having a circular cross section, Forming a band-shaped member having a cross-sectional shape corresponding to the cross-sectional shape of the groove for forming the bottom surface and both inner side surfaces; And a step of helically winding and fixing the molding die.

In the step of forming a roll having a circular cross section,
On the outer peripheral surface of the roll, a spiral groove for fitting and fixing the band-shaped member so as to obtain the interval between the adjacent substrate grooves is formed. In the step of winding and fixing the band-shaped member, the band-shaped member is fitted and fixed to the spiral groove. May be.

In the eighth molding die and the method of manufacturing the same, the band-shaped member is wound around the outer circumferential surface of the circular roll in a circular shape and fixed, so that the substrate having one groove on one surface is formed. A molding die for molding one surface of the substrate and a method for producing the same can be provided. (9) Ninth Mold and Manufacturing Method a. A ninth molding die is a molding die for molding one surface of a substrate having concave portions arranged in a grid pattern on one surface, wherein the eighth molding die comprises an outer periphery of the circular roll having a circular cross section. A spiral groove for fitting and fixing the band-shaped member so as to obtain the interval between the adjacent substrate grooves is formed on the surface, and the band-shaped member is fitted and fixed to the spiral groove, and the band-shaped member is fixed to the band-shaped member. A molding die in which a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction along the band-shaped member in a direction transverse to the member is formed.

In the eighth and ninth molding dies, it is preferable that the mold surface portion for molding the inner side surface of the substrate groove of the strip-shaped member is formed as a tapered surface for die cutting. In addition, at least a part of the outer surface of the roll having a circular cross section that comes into contact with the molding material may be subjected to a release treatment for the molding material. At least a part of the surface of the belt-shaped member that comes into contact with the molding material may be subjected to a release treatment for the molding material. b. A ninth method of manufacturing a molding die is a method of manufacturing a molding die for molding one side of a substrate having recesses on one side in a grid pattern, the method comprising:
In the method for manufacturing a molding die according to the above, a spiral groove for fitting and fixing the band-shaped member so as to obtain an adjacent substrate groove interval is formed on the outer peripheral surface of the circular cross section, and the band-shaped member is fitted into the spiral groove. Forming a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction along the belt-like member in a direction transverse to the belt-like member in the molding die to be fixed; Manufacturing method of metal mold.

The grooves in the transverse direction of the belt-shaped member may be formed by further processing a die obtained by the eighth molding die manufacturing method, or may be formed in a belt-shaped member forming step.

In the eighth and ninth methods of manufacturing a molding die, in the band-shaped member forming step, the die surface portion for molding the inner side surface of the substrate groove of the band-shaped member is tapered to form a die. It is preferable to form it. In the step of forming a roll having a circular cross section, at least a part of the outer peripheral surface of the roll that comes into contact with the molding material may be subjected to a release treatment for the molding material. In the step of forming a belt-like member,
At least a part of the surface of the belt-shaped member that contacts the molding material may be subjected to a mold release treatment for the molding material.

In the ninth molding die and the method of manufacturing the same, the belt-shaped member is wound around the outer peripheral surface of the circular roll and fixed in a circular shape, and the transverse groove is formed on the belt-shaped member. In addition, it is possible to provide a molding die for molding one surface of a substrate having a plurality of recesses on one surface along a predetermined direction, and a method of manufacturing the same.

In addition to the method described in the above (C) as the substrate forming method according to the present invention, the following method can be exemplified. (1) First Substrate Forming Method This is a method of forming a substrate having a groove or a concave portion on one side, wherein a step of mounting a transfer-moldable substrate material sheet having a predetermined thickness on a support surface of a support base, The first, second or third molding die is pressed against the substrate material sheet placed on the table support surface at a predetermined molding temperature and pressure to transfer the mold molding surface shape to the substrate material sheet. And a step of forming a substrate. (2) Second Substrate Forming Method This is a method of forming a substrate having a groove or a concave portion on one surface, and a step of mounting a transfer-moldable substrate material sheet having a predetermined thickness on a support surface of a support table, The sixth, seventh, eighth, or ninth molding die is pressed against the substrate material sheet placed on the table support surface at a predetermined molding temperature and pressure, and the substrate material sheet is relatively pressed against the substrate material sheet. Rolling and transferring a mold forming surface shape to the substrate material sheet. (3) Third substrate molding method This is a method for molding a substrate having a groove or a recess on one surface, and injecting a molten molding material into the fourth injection mold to mold the substrate. (4) Fourth Substrate Forming Method A method of forming a substrate having a groove on one side, the method including a step of extruding a molten molding material through the fifth extrusion molding die.

[0069]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention can be applied to various substrates having one or two or more grooves on one side or various substrates having recesses (for example, in a grid pattern). The description is directed to a substrate for constituting a reversible image display medium.

First, an example of the reversible image display medium will be described with reference to FIGS.

The reversible image display medium 13 shown in FIG.
The first substrate 111 and the second substrate 112 are included. These substrates 111 and 112 face each other with a predetermined gap therebetween. A partition 1 is provided between the substrates 111 and 112.
13 are provided, and the gap between the two substrates is secured to a predetermined value by these partition walls 113. That is, the partition 113 also serves as a spacer between the substrates 111 and 112. The substrates 111 and 112 are connected and fixed to each other by a partition 113.

The first substrate 111 is a transparent substrate and is formed of a material having an insulating property. For example, it is formed of a light transmitting plate such as a transparent glass, a transparent resin film, or the like. This substrate 1
Reference numeral 11 denotes a substrate on the image observation side.

The partition 113 is also provided with a developer containing cell 116.
(See FIG. 2 (A)). That is, the partition 113 is formed on the first substrate 1 as shown in FIG.
A plurality of developer accommodating cells 116, each of which is partitioned in a square shape with a part of the partition wall 113 as a partition wall, are formed in a grid pattern.

Each partition wall has a width α and a height h, and is formed such that the interval between adjacent partition walls is pt (see also FIG. 2B). The number, arrangement, and the like of the cells 116 do not need to be limited to those shown.

The second substrate 112 is not necessarily required to be transparent, but is formed of, for example, a light-transmitting plate such as transparent glass, a resin film, or the like.

As shown in FIG. 1, each cell 116 contains a dry developer DL containing white developer particles WP and black developer particles BP that are frictionally charged with each other. Here, the white developing particles WP are negatively charged and the black developing particles are positively charged.

The second substrate 112 is the first partition 111 of the first substrate 111.
Adhesive (for example, photo-curable adhesive) applied to the top surface of 13
119a is attached to the first substrate 111.
Further, the periphery of the substrates 111 and 112 is
Sealed at 19b. Thus, each cell is sealed, and the developer DL does not leak from the cell.

Next, another example of the reversible image display medium will be described with reference to FIGS.

The reversible image display medium 14 shown in FIGS. 3A and 4A is the same as the medium 13 shown in FIG.
Numeral 11 is made of a material having both light transmissive and insulating properties, and comprises a plurality of partition walls 113a extending in parallel with the longitudinal sides of the medium 14 and outer partition walls 111b and 111d at both ends instead of the lattice-shaped partition walls. The partition 113 is employed (see also FIG. 4A). A developer storage cell 116 is provided between each adjacent partition wall. Each cell 116 has a developer D containing white developing particles WP (negatively charged) and black developing particles BP (positively charged) mutually frictionally charged.
L is accommodated.

As shown in FIGS. 3A and 4A,
The second substrate 112 is adhered to the first substrate 111 with an adhesive (for example, a photo-curing adhesive) applied to the top surface of the partition wall 113. Further, the first and second substrates 112 are closed to close both ends in the cell longitudinal direction. Both ends of the substrates 111 and 112 are heat-sealed 140a.

The medium 14 shown in FIGS. 3A and 4A
In this case, before the substrates 111 and 112 are bonded to each other, both ends in the longitudinal direction of each cell 116 on the substrate 111 are open. However, each cell 116 may be provided with an outer wall at both ends in the longitudinal direction. FIG. 4B shows a medium 14 'using the substrate 111 formed as described above.

In the medium 14 'shown in FIG.
Outer peripheral wall 11 surrounding all of the plurality of cells 116 on
1 'is formed. The second substrate 112 is provided on each partition wall 1.
In addition to 13a, it is bonded to the partition outer peripheral wall 111 '.

In any case, as shown in FIG. 4, each partition wall 113a has a width α and a height h, and the adjacent partition walls 11a have a width α and a height h.
The interval 3a is formed as pt.

According to the media 13, 14, 14 ', for example, a) an electrostatic latent image corresponding to an image to be formed is formed on the first substrate 111;
B) The image carrier on which an electrostatic latent image corresponding to the image to be formed is formed is brought into contact (including proximity) with the first substrate 111, and the developer DL is driven by the developer DL based thereon. By applying an electric field, an image can be displayed as illustrated in FIGS. 1B and 3B. The second substrate 112 may be set to a ground potential or the like as necessary.

According to the reversible image display media 13, 14, 14 ', the developing particles WP, BP contained in each cell 116
Forming an electrostatic field corresponding to an image to be displayed on the developing particles in a state of being triboelectrically charged, thereby moving the developing particles by Coulomb force to perform development, and displaying an image. Can be.

Reversible image display media 13, 14, 14 '
Is to apply a different electrostatic field even after displaying an image once, apply an alternating electric field, or apply an oscillating magnetic field if at least one kind of developing particles, for example, black developing particles BP are magnetic image particles. The image can be erased or the image can be rewritten by applying a different electrostatic field. Therefore, there is no need to discard the image display medium on which the image has been displayed. Further, there is no need to supply a developer from outside. With these, conventional image display media such as paper related to image display,
Use of consumables such as a developer can be significantly reduced.

Further, unlike the conventional electrophotographic image formation, it is not necessary to dissolve and fix the toner on a sheet such as paper by heat, and the image forming energy required for this type of conventional image formation is unnecessary. Can save most.

Thus, it is possible to meet today's environmental load reduction.

According to the image display media 13, 14, 14 ', the developers contained in the cells 116 have different optical reflection densities (in other words, "different contrast" or "color difference"). Different)) because at least two types of developing particles WP and BP are included, and the developing particles are dry type developing particles, and the degree of hiding of the other type of developing particles by one type of developing particles is good. Image can be displayed with good contrast. Developed particles charged to opposite polarities due to frictional charging included in the cell 116 move under Coulomb force, so that the particles are easy to move. In this respect, an image can be displayed with good contrast, and an afterimage of the previous display occurs. It is difficult, it can display images at high speed, and can be driven at low voltage.

Dry developing particles are less likely to settle and agglomerate because they do not involve a liquid, as compared with, for example, the electrophoretic particles in a display liquid used for electrophoretic image display described above. A decrease in contrast is unlikely to occur, and stable image display can be performed for a long period of time.
Since the sedimentation and aggregation of the developing particles hardly occur, the afterimage of the previous display hardly occurs. Further, since dry development particles have less change over time in charging performance than particles in a liquid, stable image display can be performed for a long time in this respect as well.

Further, as compared with the conventional image display using a CRT display or the like, the image can be displayed easily at a high resolution and easily to the eyes.

Next, a molding die for molding a substrate for forming such a reversible image display medium, particularly a substrate having grooves for forming cells 116 on one side or recesses arranged in a grid pattern. The method of manufacturing the substrate and the method of forming the substrate will be described.

FIG. 5 (A) is a perspective view of a substrate 111 for forming the reversible image display medium 14 of the type shown in FIG. 4 (A), and FIG. 5 (B) is shown in FIG. 4 (B). 1 shows a perspective view of a substrate 111 for constituting a type of reversible image display medium 14 '.

As shown in FIG. 5, the substrate 111 is
The substrate has a plurality of grooves (here, developer accommodating cells) 116 in 1a.

A substrate 1 of the type shown in FIGS. 5A and 5B
FIG. 6 shows a perspective view of an example 10 of a molding die for molding the one surface 111a of the substrate 11 of FIG.

The mold 10 shown in FIG.
A plurality of types of blocks each having a mold surface portion for molding a part of the surface constituting the substrate single surface 111a having a 6 and forming the substrate single surface 111a by combining the mold surface portions of the respective blocks. It includes a plurality of types of block groups 11 that provide a surface 10a.

A group of a plurality of types of blocks 11 is shown in FIG.
The inner bottom surface 116 of the groove 116 of the substrate one surface 111a shown in FIG.
mold surface portion Aa and inner bottom surface 116a for molding a
As a first block having a mold surface portion Ab for molding both inner side surfaces 116b rising from FIG.
A mold surface portion Aa for forming the inner bottom surface 116a of the groove 116 of the substrate one surface 111a shown in FIG.
A first block which can be used as a first block having a mold surface portion Ab for molding both inner side surfaces 116b rising from 6a and a mold surface portion Ac for molding both inner end surfaces 116c rising from the inner bottom surface 116a. The block A and the adjacent groove 11 on the one surface 111a of the substrate shown in FIG.
A second block W having a mold surface portion Wa for molding a top surface 113b of an intermediate wall (partition wall) 113a between the six blocks W
And an outer wall portion 111b aligned with the groove located at one end M among the plurality of grooves 116 of the substrate 111 shown in FIG.
5B, or as a third block having a mold surface portion Pa for molding the top surface 111c of the substrate 111 of the outer peripheral wall 111 'surrounding the plurality of grooves 116 of the substrate 111 shown in FIG. A third block P that can also be used as a third block having a mold surface portion Pa for forming the top surface 111c of the outer peripheral wall portion 111b aligned with the groove located at one end of the plurality of grooves 116. And FIG.
The top surface 11 of the outer wall portion 111d arranged in the groove located at the other end N of the plurality of grooves 116 of the substrate 111 shown in FIG.
A substrate having a mold surface portion Ba for molding 1e, and as a fourth block in which the first, second, and third blocks A, W, and P can be fitted and arranged, or as shown in FIG. 1
A mold surface portion Ba for molding a top surface 111e of a remaining portion 111d of a U-shape in a plan view of the outer peripheral wall 111 'surrounding the plurality of grooves 116, the first, second, and third molds; A fourth block B in which blocks A, W, and P can be used as a fourth block that can be fitted and arranged. In addition,
As shown in FIG. 6, a screw hole PW1 is provided in the fourth block B.
Is provided.

In the mold 10, the first and second blocks A and W are alternately fitted into the fourth block B, and the first and last blocks A and W are first and last inserted. The third block P is fitted next to the third block P.

Then, the first, second and third blocks A, W, P are fixed by a block fixing device PW (here, a screw hole PW1 provided in the fourth block B and a bolt PW2 screwed into the screw hole PW1). A mold surface 10a is formed to be pressed and fixed to the fourth block B to form the substrate one surface 111a. The first block A is formed on the inner surface 1 of the substrate groove 116.
A mold surface portion Ab for molding 16b is formed in a tapered surface for die cutting. Blocks A, W, P, B
Even if at least a part of the molding material contact surface of at least one block has been subjected to a mold release treatment (for example, coating of a fluoro resin such as polytetrafluoroethylene, release plating coating, etc.) on the molding material. Good.

An example of a method for manufacturing the molding die 10 shown in FIG. 6 will be described below with reference to FIGS. (1) Processing of the first block A As shown in FIG. 7, a stable and rigid material (here, high-speed tool steel) having a thickness a1 (here, 0.3 mm) is formed by:
Considering the polishing finish, vertical a2 (here 10.2 mm) x
143 pieces are cut to the size of the horizontal a3 (here, 50.2 mm). Those cut in this manner are superimposed in the thickness direction (X direction in the figure), and the length (a2) is 10 mm × the width (a).
3) polished to a size of 50 mm, 143
A plurality of parts A having the same shape are produced.

Next, a tapered surface for stamping is formed on the part A. That is, as shown in FIG. 8, a plurality of parts A are inclined at a taper angle θ (about 5 degrees in this case) with one surface A1 orthogonal to the thickness direction X facing upward, and the support table 50 is inclined.
And the end of the surface A1 is polished to a tapered surface.
Similarly, the end of the surface opposite to the tapered surface is polished to a tapered surface. Similarly, the remaining parts are polished to a tapered surface to produce 143 first blocks A having the same shape. (2) Processing of the second block W As shown in FIG. 9, the thickness w1 (here, 0.05 mm)
Of the stable material (in this case, carbon tool steel) is cut into a size of w2 (here, 10 mm) × w3 (here, 50.2 mm) in consideration of the polishing finish. Those cut in such a manner are superimposed in the thickness direction (X direction in the figure) and 9.85 mm in height (w2) × 50 m in width (w3)
Polishing is performed so as to have a dimension of m, and 142 second blocks W having the same shape are manufactured. (3) Processing of the third block P As shown in FIG. 6, the thickness p1 (here, 5 mm), the vertical p
2 (9.85 mm here) x horizontal p3 (50 m here)
A third block P having a size of m) is manufactured. The third block P is made of carbon tool steel here. (4) Processing of the fourth block B As shown in FIG. 6, the first, second and third blocks A,
A fourth block B having a rectangular recess in a plan view, in which W and P can be fitted and arranged, is manufactured. This recess is machined so that the blocks A, W, and P fit in the depth direction (Y direction in the figure) without looseness, and the blocks A, W, P are used in the width direction (X direction in the figure) by the block fixing device PW. In order to be able to press against the block B without a gap, the variation in the thickness of each block is taken into consideration.
Is 55 mm, and in the depth direction (Z direction in the figure), the dimension b2 in the depth direction Z is 9.
Finish to 85mm. Then, a screw hole PW1 for screwing a bolt PW2 constituting the block fixing device PW is provided. The fourth block B is here made of carbon tool steel.

The above-mentioned block processing steps (1) to (5)
In (4), at least a part of the molding material contact surface of at least one of the blocks A, W, P, and B is subjected to a mold release treatment (for example, coating of a fluorine resin such as polytetrafluoroethylene, release). Mold plating coating). (5) Assembling of the molding die 10 The first and second blocks A and W are alternately fitted into the fourth block B, and the first block A is fitted at the beginning and end, and the last first block. A, the third block P is fitted next to A, and the first, second and third blocks A, W, P are screwed into the fourth block B with the screw PW2 of the device PW.
To assemble a molding die 10 having a die surface 10a for pressing and fixing the one surface 111a of the substrate.

In order to form a substrate 111 of the type shown in FIG. 2, that is, a substrate 111 having recesses 116 on one side in a grid pattern, the first side of the molding die 10 shown in FIG. In the block A, a groove for forming an intermediate wall in the transverse direction X between adjacent recesses 116 in a direction along the first block A is formed in a direction crossing the first block A (X direction in the drawing). You may. When manufacturing such a molding die, for example, in the direction X crossing the first block A in the first block A of the molding die 10 obtained by the above-described manufacturing method, in the direction along the first block A. A groove for forming an intermediate wall between the adjacent recesses 116 in the transverse direction X may be additionally processed.

According to the molding die 10 and the manufacturing method thereof described above, the mold surface 10 on which the substrate single surface 111a is molded is formed.
a is a single-sided substrate 11 having a substrate groove 116, respectively.
It is formed by combining a plurality of types of blocks A, W, P, and B having a mold surface portion for molding a part of the surface constituting 1a.

Each type of blocks A, W, P, and B can be used individually or collectively for each type of block independently of other types of blocks, using a large cutter or the like, in a simple and short time. Therefore, it can be manufactured accurately at low cost. In addition, if necessary, the predetermined portion can be easily formed on a highly accurate tapered surface. If necessary, a predetermined part can be satisfactorily subjected to a mold release treatment. Only by combining a plurality of types of blocks manufactured in this way, the accuracy of each part can be obtained well.

Thus, the groove 116 or the concave portion 116 on the one surface 111a of the substrate can be formed in a desired shape, size and arrangement regardless of whether it is a fine groove or a concave portion or a fine groove or a concave portion. It should be possible to form the grooves and recesses with good surface accuracy, and it is possible to manufacture the whole mold simply and inexpensively with high precision, and to have a die-cutting tapered surface in a predetermined portion. Even when the mold release treatment should be performed on a predetermined portion, the tapered surface is accurately formed and / or the mold is easily and inexpensively manufactured in a state where the mold release treatment is performed well. can do.

FIG. 10 shows a substrate 1 of the type shown in FIG.
11 is a sectional view of a schematic configuration of a part of another example 20 of a molding die for molding the one surface 111a of the substrate 11 of FIG.

The mold 20 shown in FIG.
A plurality of types of blocks each having a mold surface portion for molding a part of the surface constituting the substrate single surface 111a having a substrate shape 16; and a mold for molding the substrate single surface 111a by combining the mold surface portions of the respective blocks. It includes a plurality of types of block groups 21 for providing surfaces.

The plurality of types of blocks 21 are arranged on one side 1 of the substrate.
A first circular block A 'having a mold surface portion Aa for molding the inner bottom surface 116a of the groove 116 and a mold surface portion Ab for molding both inner side surfaces 116b rising from the inner bottom surface 116a; A second circular block W 'having a mold surface portion Wa for molding a top surface 113b of an intermediate wall 113a between adjacent grooves 116 on one side 111a, and one end of a plurality of grooves 116 on the substrate 111; The top surface 111c of the outer wall portion 111b aligned with the groove located at M
A third circular block P ′ having a mold surface portion Pa for molding the surface, and a top surface 11 of an outer wall portion 111d arranged in a groove located at the other end N among the plurality of grooves 116 of the substrate 111.
A fourth circular block having a mold surface portion Ba for molding 1e, and a shaft portion Bb 'for externally fitting the first, second, and third circular blocks A', W ', P'. And the fourth circular block B 'protruding.

Here, the first and second circular blocks A ′ and W ′ are provided with circular through holes Ac ′ and Wc ′, respectively (FIGS. 11A and 11B and FIG. 12B). A)
And (B)). As shown in FIG. 10, a male screw PW1 'extends from the shaft portion Bb' of the fourth circular block B '. The third circular block P 'is provided with a through hole or a recess (a recess here) Pc', and further provided with a through hole Pd 'that can pass through the screw PW1' of the fourth circular block B '. I have.

This mold 20 has a through-hole Ac ′, in which first and second circular blocks A ′, W ′ are provided in a shaft portion Bb ′ projecting from a fourth circular block B ′. W
At c ′, the first circular block A ′ is externally fitted at the beginning and at the end, and the third circular block P ′ is provided adjacent to the last first circular block A ′. And the first and second parts
And the third circular block A ′, W ′, P ′ is a block fixing device PW ′ (here, the shaft B of the fourth circular block B ′).
b 'and a nut PW2') screwed to the outside of the third circular block P 'with the screw PW1' provided on the fourth circular block B 'for pressing and fixing the substrate one surface 111a. A mold surface 20a is formed. In the first circular block A ′, a die surface portion Ab for forming the inner side surface 116b of the substrate groove 116 is formed as a tapered surface for die cutting.

An example of a method of manufacturing the molding die 20 shown in FIG. 10 will be described below with reference to FIGS. (1) Processing of First Circular Block A ′ As shown in FIG. 11, the thickness a1 ′ (here, 0.3 m
m) of a stable material (here, a high-speed tool steel) is formed with an inner diameter a2 ′ (here, a tapered surface) having a tapered surface for die cutting with a taper angle θ (see FIG. (B), about 5 degrees). 3
0 mm) and a circle having an outer diameter a3 '(here, 50.2 mm) is punched out by a press, and 143 circular parts are pressed. The circular parts pressed in this manner are overlapped in the thickness direction X (see FIG. (C)), and polished so that the outer diameter a3 ′ becomes 50 mm, and 143 first circular blocks A ′ having the same shape are formed. Make it. (2) Processing of the second circular block W ′ As shown in FIG. 12, the thickness w1 ′ (here, 0.05 m
m) of a stable material (in this case, carbon tool steel)
2 '(here 30 mm), outer diameter w3' (here 4
(9.9 mm) is punched out by a press, and 142 circular parts are pressed out. The circular parts pressed in this manner are overlapped in the thickness direction X (see FIG. (C)), and polished so that the outer diameter w3 ′ becomes 49.7 mm.
Two second circular blocks W ′ having the same shape are produced. (3) Processing of the third circular block P ′ As shown in FIG. 10, the diameter p2 ′ (here, 30 mm)
And a thickness p1 ′ (here, 10 m
m), a third circular block P ′ having an outer diameter p3 ′ (49.7 mm in this case) is produced, and a through hole Pd ′ through which the screw PW1 ′ of the fourth circular block B ′ can pass is formed in the circular block P ′.
Is provided. The third circular block P 'is made of carbon tool steel here. (4) Formation of Fourth Circular Block B ′ As shown in FIG. 10, a shaft portion Bb ′ for externally fitting the first, second and third circular blocks A ′, W ′, P ′ is protruded. A fourth circular block having an outer diameter b3 '(49.7 mm in this case) is formed, and a screw PW1' is provided on the shaft portion Bb '. Here, the shaft portion Bb 'has a diameter b2 so as to fit with the through holes Ac' and Wc 'provided in the circular blocks A' and W 'and the concave portion Pc' provided in the circular block P '. 'Is processed to approximately 30 mm. The fourth circular block B 'is made of carbon tool steel here. (5) Assembly of the molding die 20 The first circular block A 'and the second circular block W' are provided in the shaft portion Bb 'protruding from the fourth circular block B'. , Wc 'and alternately
At the beginning and at the end, the first circular block A 'is externally fitted, and the third circular block P' is provided adjacent to the last first circular block A 'at the recess Pc' provided therein.
And the first, second and third circular blocks A ′,
W ′ and P ′ are fixed to the fourth circular block B ′ by pressing and fixing the nut PW2 ′ of the device PW ′ to assemble the molding die 20 having the die surface 20a for molding the substrate one surface 111a.

In order to form one side 111a of a substrate of the type shown in FIG. 2, that is, a substrate 111 having recesses 116 arranged in a grid pattern on one side, a molding die 20 shown in FIG. In the direction (X direction in the figure) crossing the first circular block A ', the intermediate wall in the cross direction X between the adjacent recesses 116 in the direction along the first circular block A' is formed in the one circular block A '. May be formed. When manufacturing such a molding die,
For example, in the first circular block A ′ in the molding die 20 obtained by the above-described manufacturing method, each adjacent recess 116 in the direction X crossing the first circular block A ′ and in the direction along the first circular block A ′. A groove for forming an intermediate wall in the intersecting direction X may be additionally processed.

FIG. 13 shows a substrate 1 of the type shown in FIG.
11 shows a side view and a partial cross-sectional view of still another example 30 of a molding die for molding the one surface 111a of the substrate 11 of FIG.

The mold 30 shown in FIG. 13 includes a roll 31 having a circular cross section, an inner bottom surface 116 a of the substrate groove 116, and both inner side surfaces 1.
And a strip-shaped member 32 having a cross-sectional shape corresponding to the cross-sectional shape of the groove 116 for forming the groove 16b.

The belt-shaped member 32 is helically wound and fixed on the outer peripheral surface 31a of the roll 31 having a circular cross section at a pitch p for obtaining an interval between adjacent substrate grooves. That is, the spiral groove 31b for fitting and fixing the band-shaped member 32 so as to obtain an adjacent substrate groove interval is formed on the outer peripheral surface 31a of the circular cross section roll, and the band-shaped member 32 is fitted and fixed to the spiral groove 31b. . Note that the mold surface portion 30b for forming the inner surface 116b of the substrate groove 116 of the belt-shaped member 32 may be formed as a tapered surface for die cutting.

When manufacturing the molding die 30 shown in FIG. 13, a roll 31 having a circular cross section is formed and the inner bottom surface 1 of the groove 116 is formed.
16a and grooves 116 for forming both inner surfaces 116b
The belt-shaped member 32 having a cross-sectional shape corresponding to the cross-sectional shape of the above is formed. At this time, the outer peripheral surface 31a of the roll 31 having a circular cross section
First, a spiral groove 31b for fitting and fixing the band-shaped member 32 so as to obtain an interval between adjacent substrate grooves is formed. Then, the belt-shaped member 32 is fitted and fixed to the spiral groove 31b on the outer peripheral surface 31a of the roll 31 having a circular cross-section at a pitch p at which an interval between adjacent substrate grooves is obtained.

In order to form one side 111a of a substrate of the type shown in FIG. 2, that is, a substrate 111 having recesses 116 on one side in a grid pattern, a band-like shape is formed in a molding die 30 shown in FIG. Even if a groove for forming an intermediate wall in the transverse direction X between the adjacent recesses 116 in a direction along the belt-shaped member 32 in a direction crossing the belt-shaped member 32 (X direction in the drawing) is formed in the member 32. Good. In the case of manufacturing such a molding die, for example, each of the belts 32 in the molding die 30 obtained by the above-described manufacturing method is adjacent to each other in a direction X crossing the band-shaped member 32 in a direction along the band-shaped member 32. A groove for forming an intermediate wall in the transverse direction X between the recesses 116 may be additionally processed.

Next, a method of forming the substrate 111 will be described with reference to FIG.
This will be described with reference to FIGS. 1. Injection molding of substrate 111 In this substrate molding, as shown in FIG. 14, the molding die 10 shown in FIG. 6 is included, and the die 10 and the opposing die 41 are combined and clamped to form the substrate inside. Injection molding die 40 in which a cavity 42 is formed.

The mold 40 shown in FIG. 14 is heated to 40 ° C. to 90 ° C. 260 ° C. to 290 ° C. through a molding material injection port 43 into a cavity 42 formed between the opposing mold 41 and the mold 10.
A resin material (here, a thermoplastic resin, for example, polyethylene terephthalate (PET) or the like) melted by heating
High speed injection with an injection pressure of ^{00kg / cm 2 ~1300kg / cm 2} , to chill. Thus, a substrate 111 of the type shown in FIGS. 5A, 5B or 2 having a groove 116 or a recess 116 on one side 111a is formed. 2. Transfer Molding of Substrate 111 (a) In one substrate transfer molding, a molding die 20 shown in FIG. 10 or a molding die 30 shown in FIG. 13 is used.

As shown in FIG. 15A, a transfer-moldable substrate material sheet 111A having a predetermined thickness H is placed on the support surface 60a of the support 60, and the molding die 20 (30) is moved to a predetermined position. The material is heated to a molding temperature (here, a temperature equal to or higher than the glass transition point of the substrate material).

The heated molding die 20 (30) is pressed against the substrate material sheet 111A placed on the support base supporting surface 60a at a predetermined molding temperature and pressure, and rolled relatively to the substrate material sheet 111A. Then, the mold forming surface shape is transferred to the substrate material sheet 111A. Thus, a substrate 111 of the type shown in FIG. 5A or FIG. 2 having a groove or recess 116 on one side 111a is formed. (B) In another substrate transfer molding, a molding die 10 shown in FIG. 6 is used.

As shown in FIG. 15 (B), a transfer-moldable substrate material sheet 111A having a predetermined thickness H is placed on the support surface 60a of the support 60, and the molding die 10 is heated to a predetermined molding temperature ( Here, the substrate is heated to a temperature equal to or higher than the glass transition point of the substrate material.

The heated molding die 10 is pressed against the substrate material sheet 111A placed on the support base supporting surface 60a at a predetermined molding temperature and pressure to thereby form the substrate material sheet 111A.
The mold surface shape is transferred to the mold. Thus, a substrate 111 of the type shown in FIGS. 5A, 5B or 2 having a groove 116 or a recess 116 on one side 111a is formed. 3. Extrusion molding of the substrate 111 In this substrate molding, the molding die 10 shown in FIG.
The die 10 and the opposing die are combined and clamped to form an extrusion die 50 (T for substrate extrusion).
Die).

As shown in FIG. 16, a resin material 111B (here, a thermoplastic resin, for example, polyethylene terephthalate (PET) or the like) heated and melted at 260 ° C. to 290 ° C. by a molding material extruder 70 is placed on a T-die 50. Extruded through slits provided, extruded rolls 71, 72
Then, the unnecessary portions 111C at both ends are removed by the removing device 73, and further cut into predetermined dimensions by the cutting device 74. Thus, FIG. 5 having a groove 116 on one side 111a
A substrate 111 of the type shown in FIG.

In the substrate forming step shown in FIG. 16, a T-die 75 for extruding a transferable substrate material sheet is used in place of the T-die 50, and FIG. Mold 2 shown in
The substrate 111 may be transfer-molded using 0 (die roll). FIG. 17 is an explanatory view of the molding step.

As shown in FIG. 17, the extruder 70 heats and melts the resin material 111B at 260 ° C. to 290 ° C.
(Here, a thermoplastic resin, for example, polyethylene terephthalate (PET) or the like) is extruded in a sheet shape from a slit provided in the T-die 75, and the substrate material sheet 111 </ b> D extruded from the T-die 75 is opposed by a mold roll 20 to a counter roll 71 and a predetermined pressure is applied to the substrate material sheet 11 while rotating both rolls 20 and 71.
The mold surface shape is transferred to 1D. The substrate material sheet 111D to which the mold forming surface shape has been transferred is extruded into a roll 72.
Then, the unnecessary portions 111C at both ends are removed by the removing device 73, and further cut into predetermined dimensions by the cutting device 74. Thus, a substrate 111 of the type shown in FIG. 5A or FIG. 2 having the groove 116 or the recess 116 on one side 111a is formed.

According to the above-described substrate forming method, the groove 116 or the concave portion 116 on the one surface 111a of the substrate can be formed into a desired shape regardless of whether it is not a fine groove or a concave portion or a fine groove or a concave portion. With the shape, dimensions and arrangement described above, the surface on which the grooves and recesses are formed can be formed with good surface accuracy.

[0130]

As described above, according to the present invention, there is provided a molding die for molding one surface of a substrate for a reversible image display medium or the like having a groove or a recess on one surface, Even if the groove or recess on one side of the substrate is not a fine groove or recess, even if it is a fine groove or recess,
With the desired shape, dimensions and arrangement, it is possible to mold the surface forming the grooves and recesses with good surface accuracy, and it is possible to manufacture it easily and inexpensively with high precision. The taper surface is accurately formed and / or the mold release process is performed well even when the mold release process should be performed on a predetermined portion. Thus, it is possible to provide a molding die that can be manufactured easily and inexpensively.

Further, according to the present invention, there is provided a method of manufacturing a molding die for molding one surface of a substrate for a reversible image display medium or the like having a groove or a recess on one surface, the method comprising: Even if the groove or recess is not a fine groove or recess, even if it is a fine groove or recess, the surface on which the groove or recess is formed in a desired shape, size and arrangement. A molding die that can be molded with good surface accuracy can be manufactured easily and inexpensively with high precision. For example, the mold should have a die-cutting tapered surface in a predetermined portion or a predetermined portion. Even when the mold release treatment should be performed, the molding die having the tapered surface with high precision and / or the mold release treatment being performed well can be easily and inexpensively manufactured. It is possible to provide a method of manufacturing a molding die that can be

Further, according to the present invention, there is provided a method for forming a substrate for a reversible image display medium or the like having a groove or a recess on one surface, wherein the groove or the recess on one surface of the substrate is Even if it is not a recess, even if it is a fine groove or recess, a substrate forming method capable of forming a surface having the desired shape, dimensions and arrangement with good surface accuracy on the groove or recess. Can be provided.

[Brief description of the drawings]

FIGS. 1A and 1B show an example of a reversible image display medium, in which FIG. 1A is a cross-sectional view of the reversible image display medium before displaying an image, and FIG. FIG.

FIG. 2A is a perspective view of a first substrate having recesses arranged in a grid pattern in the medium shown in FIG. 1, and FIG.
Is a plan view thereof.

3A and 3B show another example of the reversible image display medium. FIG. 3A is a cross-sectional view of the reversible image display medium before displaying an image, and FIG. It is sectional drawing.

4 (A) is a plan view showing a part of the medium shown in FIG. 3 in a cutaway manner, and FIG. 4 (B) shows a medium having an outer peripheral wall surrounding a cell as a first substrate. It is a top view which cuts out and shows some media.

5A is a perspective view of a substrate for forming a reversible image display medium of the type shown in FIG. 4A, and FIG. 5B is a perspective view of a reversible image display medium of the type shown in FIG. FIG. 2 is a perspective view of a substrate for forming a sexual image display medium.

FIG. 6 is a perspective view showing an example of a molding die for molding one side of the substrate of the type shown in FIGS. 5A and 5B.

FIG. 7 is a perspective view showing a member being processed in the process of manufacturing the first block in the molding die shown in FIG. 6;

FIG. 8 is a view for explaining a step of polishing and polishing a predetermined surface of the member shown in FIG. 7 into a tapered surface.

FIG. 9 is a perspective view showing a member in the process of manufacturing a second block in the molding die shown in FIG. 6;

10 is a cross-sectional view showing a schematic configuration of a part of another example of a molding die for molding one surface of the substrate of the type shown in FIG. 5 (A).

FIG. 11A is a view showing a first example of the mold shown in FIG.
FIG. 3B is a plan view of the block, FIG. 2B is a cross-sectional view of the block, and FIG.

FIG. 12A is a view showing a second example of the mold shown in FIG. 10;
FIG. 3B is a plan view of the block, FIG. 2B is a cross-sectional view of the block, and FIG.

FIG. 13 is a side view and a partial cross-sectional view of still another example of a molding die for molding one surface of the substrate of the type shown in FIG. 5 (A).

14 is a sectional view showing an injection mold (cavity for molding a substrate) including the mold shown in FIG. 6, in which the mold and the opposing mold are combined and clamped.

15A is a molding die shown in FIG. 10 or FIG.
5A and 5B are diagrams for explaining a step of extruding a substrate of the type shown in FIG. 5A or FIG. 2 using the molding die shown in FIG. 3, and FIG. FIG. 5 is a view for explaining a step of transfer-molding a substrate of the type shown in FIGS. 5A, 5B or 2 using FIG.

16 includes an extrusion die (T-die for extruding a substrate) including the molding die shown in FIG. 6, in which the die and the opposing die are combined and clamped. 5
It is a figure for explaining a process of extruding a substrate of the type shown in (A).

FIG. 17 is a view of FIG. 5 (A) using the molding die shown in FIG. 10;
FIG. 3 is a view for explaining a step of transfer-molding a substrate of the type shown in FIG. 2.

[Explanation of symbols]

Reference Signs List 10 Molding die 10a Mold surface 11 Plural types of blocks 13, 14, 14 'Reversible image display medium 20 Molding die 20a Mold surface 21 Plural types of blocks 30 Molding die 31 Cross-sectional circular roll 31a Cross-section Outer peripheral surface 31b of circular roll 31 Spiral groove 32 in outer peripheral surface 31a of circular roll 31 32 Band member 40 Injection molding die (cavity for substrate molding) 41 Opposite die 42 Between opposing die 41 and die 10 Space 43 formed molding material injection port 50, 60 support table 60a support surface of support table 60 extrusion die (T die for substrate extrusion molding) 70 extruders 71, 72 extrusion roll 73 removal device 74 Cutting device 75 T-die for extrusion molding of a substrate material sheet 111 First substrate 111a One side of substrate 111 111b Outer wall portion (Outer wall portion) 111c Top surface of outer wall portion (outer wall portion) 111b 111d Outer wall portion (outer wall portion) 111e Top surface of outer wall portion (outer wall portion) 111d 111A Substrate material sheet 111B Resin material 111C Extruded resin material Unnecessary portions at both ends 111D Substrate material sheet 111 'Peripheral wall 112 surrounding a plurality of grooves 116 of substrate 111 Second substrate 113 Partition wall 113a Intermediate wall (partition wall) between grooves 113b Top surface of intermediate wall 113a 116 Substrate 111 Groove (developer accommodating cell) 116a Inner bottom surface of groove 116b Both inner side surfaces rising from inner bottom surface 116a 116c Both inner end surfaces rising from inner bottom surface 116a 119a Adhesive 119b Sealant 140a Sealing both ends of each cell α Width of each partition wall θ Taper angle a1 First block A Thickness a2 Vertical dimension of first block A a3 Horizontal dimension of first block A b1 Width of recess in fourth block B b2 Depth of recess in fourth block B h Height of each partition wall p Adjacent Pitch for obtaining substrate groove interval p1 Thickness of third block P p2 Vertical dimension of third block P p3 Horizontal dimension of third block P pt Adjacent partition wall interval w1 Thickness of second block W w2 Thickness of second block W Vertical dimension w3 Horizontal dimension of second block W a1 'Thickness of first circular block A' a2 'Inner diameter of first circular block A' a3 'Outer diameter of first circular block A' b2 'Fourth circular block B B3 'outer diameter of fourth circular block B' p1 'thickness of third circular block P' p2 'diameter of recess Pc' of third circular block P 'p3' third circular block Outer diameter of P 'w1' Thickness of second circular block W ' w2 'Inner diameter of second circular block W' w3 'Outer diameter of second circular block W' A First block Aa, Ab, Ac Mold surface portion A1 Surface orthogonal to thickness direction B Fourth block Ba Mold surface portion BP Black developing particles DL Dry developer H Thickness of substrate material sheet 111A M One end (one side) of the plurality of grooves 116 N The other end of the plurality of grooves 116 P Third block Pa Mold Surface portion PW Block fixing device PW1 Screw hole provided in fourth block B PW2 Bolt screwed into screw hole PW1 W Second block Wa Mold surface portion WP White developing particles A 'First circular block Ac' First Through hole of circular block A 'B' Fourth circular block Bb 'Shaft for externally fitting blocks A', W ', P' of block B 'P' Third circular block Pc 'Third circular block P' Recess of Pd ' Through hole W 'Second circular block Wc' Through hole of second circular block W 'PW' Block fixing device PW1 'Screw provided on fourth circular block B' PW2 'Nut screwed into screw PW1'

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiko Matsuura 2-3-1-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside Osaka International Building Minolta Co., Ltd. (72) Inventor Ryuji Kurita 5-Sayama, Sayama-shi, Osaka, Osaka 2232-3-2-1-1 F term (reference) 4F202 AF01 AG01 AG05 AG28 CA11 CA19 CA27 CB01 CD16 CD30 CK42 CL02

Claims (38)

[Claims] 1. A molding die for molding one surface of a substrate having a groove on one surface, the mold being for molding a part of a surface constituting one surface of the substrate having the groove. A plurality of types of blocks each having a surface portion, and including a plurality of types of blocks that provide a mold surface for forming one surface of the substrate by combining the mold surface portions of the respective blocks, and the plurality of types of blocks are the same. A molding die, which is combined so as to form a die surface for molding one surface of the substrate at a die surface portion. 2. A molding die for molding one side of a substrate having a plurality of grooves on one side, the mold for molding a part of a surface constituting one side of the substrate having the grooves. A plurality of types of blocks having a mold surface portion, including a plurality of types of blocks that provide a mold surface for forming one side of the substrate by combining the mold surface portions of the respective blocks, wherein the plurality of types of blocks are A first surface having a mold surface portion for molding an inner bottom surface of the groove and both inner surfaces rising from the inner bottom surface on one surface of the substrate;
A block, a second block having a mold surface portion for forming a top surface of an intermediate wall between adjacent grooves on one side of the substrate, and a second block located at one end of the plurality of grooves on the substrate. A third block having a mold surface portion for forming the top surface of the outer wall portion aligned with the groove; and forming the top surface of the outer wall portion aligned with the groove located at the other end of the plurality of grooves of the substrate. Having a mold surface part for
A fourth block capable of fitting and arranging the first, second and third blocks, wherein the first and second blocks are alternately fitted into the fourth block, and the first and second blocks are first and lastly inserted. One block is fitted and the third block is fitted next to the last first block, and the first, second and third blocks are pressed and fixed to the fourth block by a block fixing device, and the one surface of the substrate is fixed. A molding die, wherein a die surface for molding is formed. 3. A molding die for molding one surface of a substrate having a plurality of grooves on one surface, the mold for molding a part of a surface constituting one surface of the substrate having the grooves. A plurality of types of blocks having a mold surface portion, including a plurality of types of blocks that provide a mold surface for molding one surface of the substrate by combining the mold surface portions of each block, and the plurality of types of blocks are A first block having an inner bottom surface of the groove on one surface of the substrate, two inner side surfaces rising from the inner bottom surface, and a mold surface portion for molding both inner end surfaces rising from the inner bottom surface; A second block having a mold surface portion for molding a top surface of an intermediate wall between the matching grooves; and a peripheral block surrounding the plurality of grooves of the substrate, and one of the plurality of grooves of the substrate. Outer peripheral wall lined with groove located at the end A third block having a mold surface portion for molding the top surface of the minute, and a mold surface portion for molding the remaining top surface of the outer peripheral wall surrounding the plurality of grooves of the substrate; First, second and third
And a fourth block that can be inserted and arranged. The first and second blocks are alternately inserted into the fourth block, and the first and last blocks are first and last inserted and the last block is inserted. The third block is fitted next to one block, and the first, second, and third blocks are pressed and fixed to the fourth block by a block fixing device to form a mold surface for molding one surface of the substrate. A molding die characterized by being made. 4. A molding die according to claim 2, wherein said first block has a die surface portion for molding an inner surface of said substrate groove formed as a tapered surface for die cutting. 5. A molding die for molding one surface of a substrate having recesses in a grid pattern on one surface, wherein the molding die according to any one of claims 2 to 4. A molding die in which a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction along the first block in a direction crossing the first block is formed in the first block. 6. An injection mold for injection molding a substrate having a groove or a recess on one side, wherein the mold is combined with the mold according to any one of claims 1 to 5. And a facing mold forming a cavity for molding the substrate. 7. An extrusion molding die for extruding a substrate having a groove on one side, wherein the molding die according to any one of claims 1 to 4 is combined with the molding die. An opposing mold for forming a die for extruding a substrate. 8. A molding die for molding one surface of a substrate having a plurality of grooves on one surface, the mold for molding a part of the surface constituting one surface of the substrate having the grooves. A plurality of types of blocks having a mold surface portion, including a plurality of types of blocks that provide a mold surface for forming one side of the substrate by combining the mold surface portions of the respective blocks, wherein the plurality of types of blocks are A first surface having a mold surface portion for molding an inner bottom surface of the groove and both inner surfaces rising from the inner bottom surface on one surface of the substrate;
A circular block, a second circular block having a mold surface portion for forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate, and a second circular block having one end of the plurality of grooves of the substrate. A third circular block having a mold surface portion for molding the top surface of the outer wall portion aligned with the groove to be formed; and a top surface of the outer wall portion aligned with the groove located at the other end of the plurality of grooves of the substrate. A fourth circular block having a mold surface portion for molding, the fourth circular block having a shaft protruding from the first, second, and third circular blocks for external fitting. The first and second circular blocks are alternately fitted to a shaft protruding from the fourth circular block through through holes provided therein, and the first and second circular blocks are first and lastly the first circular block. The circular block is fitted over and is next to the last first circular block The third circular block is externally fitted in a through hole or a recess provided in the third circular block, and the first, second and third circular blocks are fitted.
Wherein the circular block is pressed and fixed to a fourth circular block by a block fixing device to form a mold surface for molding one surface of the substrate. 9. The molding die according to claim 8, wherein the first circular block has a die surface portion for forming an inner surface of the substrate groove formed as a tapered surface for die cutting. 10. A molding die for molding one surface of a substrate having concave portions arranged in a grid pattern on one surface, wherein the first circular shape is used for molding the substrate. In the direction across the first circular block, the first
A molding die in which a groove for forming an intermediate wall in the transverse direction between each of the adjacent recesses in a direction along the circular block is formed. 11. The molding material according to claim 1, wherein at least a part of a molding material contact surface of at least one of the plurality of types of blocks is subjected to a mold release treatment for the molding material. Mold for molding. 12. A molding die for molding one side of a substrate having a plurality of grooves on one side, comprising: a roll having a circular cross section; and an inner bottom surface and both inner side surfaces of the substrate groove. A band-shaped member having a cross-sectional shape corresponding to the cross-sectional shape of the groove, wherein the band-shaped member is helically wound and fixed on the outer peripheral surface of the circular cross-sectional roll at a pitch to obtain an interval between adjacent substrate grooves. Characteristic mold for molding. 13. A spiral groove is formed on the outer peripheral surface of the circular cross-section roll to fit and fix the band-shaped member so as to obtain the interval between the adjacent substrate grooves, and the band-shaped member is fitted and fixed in the spiral groove. The molding die according to claim 12, which is formed. 14. A molding die for molding one surface of a substrate having concave portions arranged in a grid pattern on one surface, wherein the belt-shaped member has a belt-like shape. A molding die in which a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction along the band-shaped member in a direction transverse to the member is formed. 15. The molding die according to claim 12, wherein the die surface portion for molding the inner surface of the substrate groove of the strip-shaped member is formed as a tapered surface for die cutting. 16. The molding die according to claim 12, wherein at least a part of the outer surface of the roll having a circular cross section, which is in contact with the molding material, is subjected to a release treatment for the molding material. . 17. The molding die according to claim 12, wherein at least a part of a surface of said band-shaped member which comes into contact with the molding material is subjected to a release treatment for said molding material. 18. A method for manufacturing a molding die for molding one side of a substrate having a groove on one side, the method comprising forming a part of a surface constituting one side of the substrate having the groove. Forming a plurality of types of blocks that provide a mold surface for molding one side of the substrate by combining a plurality of types of blocks having mold surface portions, and combining the mold surface portions of the respective blocks; and Combining the blocks so as to form a mold surface for molding the one surface of the substrate with their mold surface portions. A method of manufacturing a molding die, comprising: 19. A method of manufacturing a molding die for molding one side of a substrate having a plurality of grooves on one side, the method comprising forming a part of a surface constituting one side of the substrate having each of the grooves. Forming a plurality of types of blocks having a mold surface portion for forming a plurality of types of blocks that provide a mold surface for molding one side of the substrate by combining the mold surface portions of the respective blocks; and Assembling a molding die having a mold surface for molding the one surface of the substrate by combining different types of blocks, wherein the block forming step includes, from the inner bottom surface and the inner bottom surface of the groove on the one surface of the substrate. First having a mold surface portion for molding both rising inner surfaces
A step of forming a block; a step of forming a second block having a mold surface portion for forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate; Forming a third block having a mold surface portion for molding a top surface of an outer wall portion aligned with the groove located at one end; and positioning the third block at the other end of the plurality of grooves of the substrate. A mold surface portion for molding the top surface of the outer wall portion aligned with the groove to be formed,
Forming a fourth block that can be fitted and arranged with the first, second and third blocks. In the molding die assembly step, the first and second blocks are inserted into the fourth block. Blocks are inserted alternately, and the first block is inserted first and last, and the third block is inserted next to the last first block, and the first, second, and third blocks are inserted into the fourth block. A method for manufacturing a molding die, comprising assembling a molding die having a die surface for pressing and fixing to a block to form one surface of the substrate. 20. A method for manufacturing a molding die for molding one side of a substrate having a plurality of grooves on one side, the method comprising forming a part of a surface constituting one side of the substrate having the groove. Forming a plurality of types of blocks having a mold surface portion for forming a plurality of types of blocks that provide a mold surface for molding one side of the substrate by combining the mold surface portions of the respective blocks; and Assembling a molding die having a mold surface for molding the one surface of the substrate by combining different types of blocks, wherein the block forming step includes, from the inner bottom surface of the groove on the one surface of the substrate, Forming a first block having a mold surface portion for molding both rising inner surfaces and both inner end surfaces rising from the inner bottom surface; forming a top surface of an intermediate wall between adjacent grooves on one surface of the substrate; Forming a second block having a mold surface portion for performing the step of forming the second block, wherein, of the outer peripheral walls surrounding the plurality of grooves of the substrate, the grooves are arranged in a groove located at one end of the plurality of grooves of the substrate. Forming a third block having a mold surface portion for molding the top surface of the outer peripheral wall portion; and a mold surface for molding the remaining top surface of the outer peripheral wall surrounding the plurality of grooves of the substrate. Part, wherein the first, second and third
Forming a fourth block capable of fitting and disposing the first block. In the forming mold assembling step, the first and second blocks are alternately fitted into the fourth block, and Finally, the first block is fitted, and the third block is fitted next to the last first block, and the first, second and third blocks are pressed and fixed to the fourth block, and the one surface of the substrate is fixed. A method of manufacturing a molding die, comprising assembling a molding die having a die surface for molding a mold. 21. The method according to claim 21, wherein in the first block forming step, the first block is formed.
21. A mold surface portion for forming an inner surface of the substrate groove of the block is formed as a tapered surface for cutting.
A method for producing the molding die according to the above. 22. A method for manufacturing a molding die for molding one side of a substrate having recesses arranged in a grid pattern on one side, wherein the molding metal according to any one of claims 19 to 21. Forming a groove for forming an intermediate wall in the transverse direction between the adjacent recesses in a direction transverse to the first block in a direction along the first block in the first block in a method of manufacturing a mold; Manufacturing method of metal mold. 23. A method of manufacturing a molding die for injection-molding a substrate having a groove or a recess on one surface, the method comprising:
22. A molding die obtained by the method of manufacturing a molding die according to any one of to 22 and an opposite die that is combined with the die to form a cavity for molding the substrate. A method for producing a mold for injection molding to obtain a mold. 24. A method of manufacturing a molding die for extruding a substrate having a groove on one surface, the method comprising: forming a molding die obtained by the method of manufacturing a molding die according to any one of claims 18 to 21. A method for manufacturing an extrusion molding die, wherein an extrusion die is obtained by combining a die with an opposing die which is combined with the die to form a die for extrusion of the substrate. 25. A method for manufacturing a molding die for molding one side of a substrate having a plurality of grooves on one side, the method comprising forming a part of a surface constituting one side of the substrate having the groove. Forming a plurality of types of blocks having a mold surface portion for forming a plurality of types of blocks that provide a mold surface for molding one side of the substrate by combining the mold surface portions of the respective blocks; and Assembling a molding die having a mold surface for molding the one surface of the substrate by combining different types of blocks, wherein the block forming step includes, from the inner bottom surface and the inner bottom surface of the groove on the one surface of the substrate. First having a mold surface portion for molding both rising inner surfaces
A step of forming a circular block; a step of forming a second circular block having a mold surface portion for molding a top surface of an intermediate wall between adjacent grooves on one surface of the substrate; Forming a third circular block having a mold surface portion for forming a top surface of an outer wall portion aligned with the groove located at one end of the groove; and the other end of the plurality of grooves of the substrate. A fourth circular block having a mold surface portion for molding a top surface of an outer wall portion aligned with a groove located at a groove portion, wherein a shaft portion for externally fitting the first, second, and third circular blocks is provided. Forming a fourth circular block protruding from the first circular block and the second circular block on the shaft protruding from the fourth circular block. The blocks are alternately outside with the through holes provided in them. First and lastly, the first circular block is externally fitted, and the third circular block is fitted next to the last first circular block at a through hole or a recess provided in the third circular block. Forming a mold having a mold surface for molding one side of the substrate by pressing and fixing the first, second and third circular blocks to a fourth circular block. Mold manufacturing method. 26. The first circular block forming step, wherein a die surface portion for forming an inner surface of the substrate groove of the first circular block is formed as a tapered surface for die cutting.
A method for producing the molding die according to the above. 27. A method of manufacturing a molding die for molding one surface of a substrate having a recess in a grid pattern on one surface, the method of manufacturing a molding die according to claim 25 or 26. Forming a groove in the first circular block to form an intermediate wall in the transverse direction between the adjacent recesses in a direction along the first circular block in a direction transverse to the first circular block; Mold manufacturing method. 28. The block forming step according to claim 18, wherein at least a part of at least one molding material contact surface of said plurality of types of blocks is subjected to a mold release treatment for said molding material. Method for manufacturing a molding die. 29. A method of manufacturing a molding die for molding one side of a substrate having a plurality of grooves on one side, the method comprising: forming a roll having a circular cross section; and an inner bottom surface and both inner surfaces of the groove. Forming a band-shaped member having a cross-sectional shape corresponding to the cross-sectional shape of the groove for forming the groove, and spirally winding the band-shaped member around the outer peripheral surface of the circular cross-section roll at a pitch to obtain an interval between adjacent substrate grooves. A method of manufacturing a molding die, comprising: fixing. 30. In the step of forming a roll having a circular cross section, a spiral groove is formed on the outer peripheral surface of the roll so as to fit and fix the strip-shaped member so as to obtain a space between the adjacent substrate grooves, and the winding of the strip-shaped member is performed. 30. The method according to claim 29, wherein in the fixing step, the band-shaped member is fitted and fixed in the spiral groove. 31. A method for manufacturing a molding die for molding one surface of a substrate having a recess in a grid pattern on one surface, wherein the method comprises the steps of: A method for manufacturing a molding die, wherein a groove for forming an intermediate wall in the transverse direction between each of the adjacent recesses in a direction transverse to the belt-like member and in a direction along the belt-like member is formed in the belt-like member. 32. The molding according to claim 29, wherein in the step of forming the belt-like member, a die surface portion for molding the inner surface of the substrate groove of the belt-like member is formed as a tapered surface for die-cutting. Manufacturing method of metal mold. 33. In the roll forming step, at least a part of the outer peripheral surface of the roll that comes into contact with the molding material is subjected to a mold release treatment for the molding material.
The method for producing a molding die according to any one of the above. 34. The molding metal according to claim 29, wherein in the band-shaped member forming step, at least a part of a surface of the band-shaped member that comes into contact with the molding material is subjected to a release treatment for the molding material. Mold manufacturing method. 35. A method of forming a substrate having a groove or a recess on one side, comprising: mounting a transferable moldable substrate material sheet having a predetermined thickness on a support surface of a support table; 6. A step of pressing the molding die according to any one of claims 1 to 5 on the mounted substrate material sheet at a predetermined molding temperature and pressure to transfer a mold molding surface shape to the substrate material sheet. A substrate forming method comprising: 36. A method for forming a substrate having a groove or a recess on one surface, comprising: mounting a transferable moldable substrate material sheet having a predetermined thickness on a support surface of a support table; The molding die according to any one of claims 1, 8 to 10, and 12 to 17 is pressed against the placed substrate material sheet at a predetermined molding temperature and pressure, and is pressed relative to the substrate material sheet. And transferring the shape of the mold forming surface to the substrate material sheet. 37. A method of molding a substrate having a groove or a recess on one side, the method comprising the steps of: injecting a molten molding material into an injection mold and molding the substrate. 38. A method of molding a substrate having a groove on one side, the method comprising the step of extruding a molten molding material through an extrusion molding die according to claim 7.