JP6680646B2 - Mold material storage container - Google Patents

Description

  The present invention relates to a mold material storage container.

  A mold material such as nickel mode, quartz mold, or silicon mold is used for nanoimprint. This mold material can be used for LSI manufacturing and is drawing attention. Usually, the mold material manufacturing device and the device that uses the manufactured mold material are located in different places, and the mold material is stored in a storage container and stored or transported.

  On the surface of the mold material, a pattern composed of a collection of fine irregularities is formed. In some cases, the pattern is formed in the central portion, and the pattern is not formed in the outer peripheral edge portion. A storage container with a lid is used as the storage container.

  Further, a storage container that uses a magnet to hold a device such as a semiconductor element has been proposed, although it is not a storage container for a mold material (for example, see Patent Documents 1 and 2).

JP, 2010-13189, A JP2012-224379A

  When the mold material is simply put in the storage container for storage and transportation, the mold material moves in the storage container or comes into contact with the inner surface of the storage container. As a result, the mold material is deformed, the pattern is damaged, and the like. In order to prevent such deformation and damage of the mold material, an adhesive tape having an adhesive layer on one side is attached so as to straddle the outer peripheral edge of the mold material and the mounting surface of the storage container, and the mold material is placed in the storage container. It is being fixed.

  In the case of fixing the mold material with the adhesive tape, when the adhesive tape is peeled off, a so-called adhesive residue may occur in which the adhesive layer remains on the mold material. The adhesive residue is not preferable because the mold material is contaminated and an adhered substance is generated. Further, when the adhesive tape is peeled off, stress may be applied to the mold material and the mold material may be deformed.

  Instead of the adhesive tape, for example, a cross-shaped leaf spring may be curved and the mold material may be pressed by the elastic force generated by the deformation of each end of the leaf spring. However, in this case, since the mold material is pressed by the leaf spring, stress may be applied to the mold material and the mold material may be deformed. In addition, scratches and dust may be generated due to scratches on the contact portion of the leaf spring.

  Instead of the holding method as described above, as disclosed in Patent Documents 1 and 2, it is also possible to divert the technique of holding a stored object such as a device in a storage container with a magnet to hold the mold member. However, in this case, since the mold material is brought into close contact with the magnet by the magnetic force, if the mold material is thin, there is a problem in that even if the outer peripheral edge of the mold material is pinched with, for example, tweezers when peeling, it cannot be properly picked. Further, even if it is pinched, since the mold material is in close contact with the magnet, peeling becomes difficult and the thin mold material is deformed by the tensile force at the time of peeling. Therefore, it is not possible to solve the problem associated with thin mold members simply by diverting the technique of magnetic attraction.

  An object of the present invention is to provide a mold material container in which foreign matter is not attached to the mold material, and scratches and damages are not generated.

  In order to achieve the above object, the mold material storage container of the present invention includes a container body, a lid, and a magnet. The container body has a mounting surface on which a mold material made of a magnetic material is placed. The lid is openably and closably attached to the container body and covers the mold material. The magnet brings the mold material into close contact with the mounting surface by magnetic force.

The mold material has a pattern surface and an outer peripheral edge portion surrounding the pattern surface, and the outer peripheral edge of the mounting surface is located inside the outer peripheral edge portion of the mold material and outside the outer peripheral edge of the pattern surface . In addition, a groove, a recess, or a notch that forms a gap with the outer peripheral edge of the mold material is provided in the outer peripheral edge of the mounting surface . The thickness of the mold material is not particularly limited, but the mold material container of the present invention is suitable for accommodating a thin mold material. The thin mold material referred to in the present invention means a material that has flexibility and is easily stretched and deformed by the action of a tensile force. The range is different depending on the material, but the thickness is 1 μm or more and 2 mm or less, preferably It is in the range of 10 μm or more and 1 mm or less, particularly preferably 100 μm or more and 700 μm or less.

Further, a magnet displacing portion for displacing the magnet between a close position where the magnet is brought close to the mold material to closely contact the mounting surface and a release position where the magnet is separated from the mold material to release the close contact of the mold material to the mounting surface. Have. The magnet is a set of a plurality of divided magnets divided in a direction parallel to the mounting surface, and at least one of the divided magnets is preferably displaced by the magnet displacement portion between the contact position and the release position. It is preferable that the magnet displacing portion has a storage hole for movably holding the magnet in the close contact position and the release position. The magnet preferably has an operation member operable from the outside of the container body. It is preferable to have an interlocking mechanism that brings the magnet to the close contact position when the lid is open and sets the magnet to the release position when the lid is closed.

The magnet is a flexible magnet sheet, and the magnet sheet has a separating portion that separates a part of the magnet sheet from the mold material from the outside of the container body .

The mold material storage container of the present invention includes a container body, a lid, a first magnetic body, and a second magnetic body. The container body has a mounting surface on which the mold material is placed. The lid is openably and closably attached to the container body and covers the mold material. At least one of the first magnetic body and the second magnetic body is a magnet, and holds the mold material on the mounting surface by magnetic force. The mold material has a pattern surface and an outer peripheral edge portion surrounding the pattern surface, and the first magnetic body or the second magnetic body facing the pattern surface forms a gap that maintains a non-contact state with a portion facing the pattern surface. It has a concave portion or a cutout portion .

  According to the present invention, it is possible to provide a mold material container in which foreign matter does not adhere to the mold material, and scratches and damages are prevented.

It is a perspective view showing a mold material storage container of a 1st embodiment of the present invention. It is a top view which shows a mold material storage container. It is a side view which notches and shows a part of mold material storage container. It is a rear view which notches and shows a part of model material storage container. It is a side view which shows the holding state of a mold material. It is a side view which shows the holding | maintenance state of the mold material of the modification 1 using a protection sheet. It is a perspective view which shows the principal part of the mold material storage container of the modification 2 which uses a ring-shaped magnet. It is a perspective view which shows the principal part of the mold material storage container of 2nd Embodiment which changed the outer diameter size of the magnet. It is a top view which shows the principal part of the mold material storage container of the modification 3 which changed the outer shape of the magnet. FIG. 11 is a perspective view showing a main part of a mold material storage container of Modification 4 having a groove in a part of a magnet. It is a top view which shows the principal part of the mold material storage container of 3rd Embodiment which moves a split magnet. It is sectional drawing which follows the XII-XII line in FIG. 11, and has shown the state in which a division magnet exists in a contact | adherence position. It is sectional drawing which follows the XII-XII line in FIG. 11, and has shown the state in which a split magnet exists in a cancellation | release position. It is a top view which shows the principal part of the mold material storage container of the modification 5 which moves a split magnet. It is sectional drawing which follows the XV-XV line in FIG. 14, and has shown the state in which a division | segmentation magnet exists in a contact position. It is sectional drawing which shows the mold material storage container of the modification 6 which has the double bottom plate, and has shown the state with the lid closed. It is sectional drawing which shows the mold material storage container of the modification 6 of the state which opened the lid. It is a top view which shows the principal part of the mold material storage container of the modification 7 which divided the magnet into two. FIG. 11 is a cross-sectional view showing a main part of a template storage container according to a modification 7 with a movable bottom plate opened. It is sectional drawing which shows the principal part of the template storage container of the modification 8 which uses a magnet sheet. It is sectional drawing which shows the mold material storage container of 4th Embodiment using an interlocking mechanism, and has shown the state with the lid closed. It is sectional drawing which shows the principal part of the mold material storage container of 4th Embodiment, and has shown the state with the lid open. It is a perspective view showing a model material storage container of a 5th embodiment. It is sectional drawing which shows the mold material storage container of 6th Embodiment which uses an electromagnet as a magnet.

[First Embodiment]
As shown in FIG. 1, the mold material container 10 of the present invention includes a container body 11, a lid 12 and a magnet 13. The container body 11 is formed in a rectangular box shape with an open top. The container body 11 is composed of a rectangular bottom plate 11A and side plates 11B and 11C that cover the outer periphery of the bottom plate 11A.

  As shown in FIG. 2, the lid 12 is attached to one side plate 11B via a hinge portion 17 so as to be openable and closable. The lid 12 is displaced by the hinge portion 17 between the open position shown in FIG. 1 and the closed position shown in FIG. In the open position, the lid 12 is at about 90 ° with respect to the bottom plate 11A. In the closed position, the lid 12 is parallel to the bottom plate 11A.

  The lid 12 has a locking claw portion 18 on the side opposite to the hinge portion 17. A locking projection 19 is formed on the side plate 11B of the container body 11 at a position corresponding to the locking claw portion 18. When the lid 12 is closed, the locking claw portion 18 is locked by the locking projection 19, and the lid 12 is maintained in the closed state. An O-ring (not shown) is provided on the mating surface between the lid 12 and the container body 11 if necessary. The O-ring seals the inside of the container body 11 when the lid 12 is closed.

  The magnet 13 is composed of a permanent magnet, and is attached to the upper surface of the bottom plate 11A by an adhesive or the like, as shown in FIGS. 3 and 4. As shown in FIG. 2, the magnet 13 is formed in a rectangular plate shape and attracts the mold material 15, which is a nickel (Ni) mold, by magnetic force. As a result, the mold material 15 adheres to the magnet 13. The surface of the magnet 13 becomes the mounting surface 13A of the mold material 15.

  The thickness of the mold material 15 is not particularly limited, and mold materials 15 having various thicknesses can be stored. The mold material 15 stored in the mold material storage container 10 of the present embodiment is formed in a circular shape by cutting a thin nickel sheet having a thickness of 120 μm, for example. In addition, in each drawing, in order to display the mold material 15 in an easy-to-understand manner, the thickness thereof is exaggerated with respect to other members.

  As shown in FIGS. 1 and 5, a pattern surface 15A is formed on one surface (surface) of the mold material 15 at the center. The pattern surface 15A is composed of a collection of fine irregularities, and is formed, for example, in a circular shape in a plan view. The range of the mold material 15 preferably used in the present invention varies depending on the material, but the thickness is in the range of 1 μm or more and 2 mm or less, preferably 10 μm or more and 1 mm or less, and particularly preferably 100 μm or more and 700 μm or less. The mold material 15 having such a thickness range is referred to as a thin mold material 15 in the present invention, but the range varies depending on the material. The point is that the mold material 15 is thin if it is flexible and is thin enough to be easily deformed when stress is applied to it for taking it out during normal handling.

  The mold material 15 has an outer peripheral edge portion 15B surrounding the pattern surface 15A. The back surface opposite to the surface on which the pattern surface 15A is formed is placed so as to be in close contact with the mounting surface 13A of the magnet 13. As a result, the pattern surface 15A does not contact the magnet 13, and the pattern surface is not damaged by the contact with the magnet 13.

  When using the mold material container 10 of the first embodiment, the lid 12 is opened and the mold member 15 is placed on the magnet 13. The nickel-made mold material 15 is attracted to the mounting surface 13A of the magnet 13 by the magnetic force and is brought into close contact with the mounting surface 13A. Since the back surface of the mold material 15 is in close contact with the mounting surface 13A of the magnet 13, the pattern surface 15A on the front surface does not contact the magnet 13 and the pattern surface 15A is not damaged.

[Modification 1]
In the first embodiment, the back surface of the mold material 15 is directly adhered to the magnet 13, but in the modification 1 shown in FIG. 6, the protective sheet 21 is inserted between the magnet 13 and the mold material 15. The protective sheet 21 prevents the surface of the magnet 13 and the mold member 15 from directly contacting each other, and is made of a non-magnetic material. When the protective sheet 21 is used, the front and back of the template 15 of the first embodiment shown in FIG. 5 are arranged so that the pattern surface 15A of the template 15 contacts the protective sheet 21. In this case, the back surface of the mold material 15 is exposed to the outside, the pattern surface 15A is not contacted, and the pattern surface 15A can be prevented from being damaged. In addition, in each of the following modifications and embodiments, the same components are denoted by the same reference numerals, and duplicate description is omitted. The protective sheet 21 is formed sufficiently thin so as not to impair the adhesion of the mold material 15 due to the magnetic force. Similarly to the mold material 15, the protective sheet 21 is also exaggerated in its thickness.

[Modification 2]
Instead of using the protective sheet 21, in the second modification shown in FIG. 7, the magnet 22 is formed into a ring shape and only the outer peripheral edge portion 15B of the mold material 15 is brought into contact with the magnet 22. In this case, even if the pattern surface 15A faces the magnet 22 side, the magnet 22 does not directly contact the pattern surface 15A. Therefore, the pattern surface 15A is not exposed to the outside and scratches and dust are prevented. Although the magnet 22 is formed in a ring shape having a circular opening, it may be a concave portion, a groove, or a cutout portion for forming a gap that maintains a non-contact state with a portion facing the pattern surface 15A. Well, its shape is not particularly limited. Also in this case, the pattern surface 15A can be brought into non-contact with the magnet.

[Second Embodiment]
As shown in FIG. 5, when the thin mold material 15 is attracted to the magnet 13 by the magnetic force and the mold material 15 comes into close contact with the mounting surface 13A, it is difficult to remove the mold material 15 by peeling it from the magnet 13. Therefore, in the second embodiment shown in FIG. 8, the outer shape size (outer diameter D2) of the magnet 25 is made smaller than the outer size size (outer diameter D1) of the mold material 15 in order to easily take out the mold material 15. . Due to this difference in external dimensions (D1-D2), the non-contact portion 15C of the mold material 15 due to the magnet 25 is formed. A gap is created between the magnet 25 and the mold material 15 by the non-contact portion 15C. By inserting the tip of tweezers into this gap, the mold material 15 can be easily pinched.

[Modification 3]
Instead of the second embodiment in which the non-contact portion 15C is formed by changing the outer shape size, in Modification 3 shown in FIG. 9, a rectangular magnet 26 is used for the circular mold material 15, and the outer shapes in plan view are mutually changed. By changing to, the non-contact portion 15C shown by hatching is formed. In Modification 3, as in the second embodiment, the non-contact portion 15C is formed between the magnet 26 and the mold material 15, so that the mold material 15 can be easily taken out.

[Modification 4]
In Modification 4 shown in FIG. 10, four grooves 28A are formed in a part of the surface of the magnet 28, and a non-contact portion 15C is formed in the mold material 15. Also in this case, the mold material 15 can be easily pinched by inserting a tip end portion such as tweezers into the non-adhesive portion 15C formed by the groove 28A. Instead of the groove 28A, a recess or a cutout may be used.

[Third Embodiment]
In the third embodiment shown in FIGS. 11 to 13, when the mold member 15 is taken out from the bottom plate 31, the split magnet 30A is moved and separated from the mold member 15 by the magnet displacing portion, and the attraction force by the magnetic force is reduced to reduce the mold member 15. It is easy to take out. The magnet displacement portion has a storage hole 31A. The storage hole 31A stores the split magnet 30A movably between the close contact position and the release position.

  As shown in FIG. 11, the magnet is configured as a set of a plurality of divided magnets 30A divided in a direction parallel to the mounting surface 13A, for example, a set of four divided magnets 30A. These split magnets 30A are arranged in the storage hole 31A near each corner of the square bottom plate 31, for example. The storage hole 31A is formed in the bottom plate 31 on a diagonal line connecting the corners of the rectangular bottom plate 31. In the storage hole 31A, the split magnet 30A moves between the close contact position shown in FIG. 12 and the release position shown in FIG.

  The close contact position is a position where the split magnet 30A is located inside the storage hole 31A. At this contact position, the mold material 15 is attracted to the split magnet 30A by the magnetic force of the split magnet 30A. The release position shown in FIG. 13 is a position where the split magnet 30A is located outside the storage hole 31A. At this release position, the attraction force due to the magnetic force of the split magnet 30A is weakened or lost, and the mold material 15 can be easily picked from the bottom plate 31 and peeled off.

  A spring material 32 made of a coil spring is put in the storage hole 31A. The spring member 32 urges the split magnet 30A from the release position to the close contact position. The split magnet 30A is set to the close contact position by the spring material 32.

  On the outer surface of the bottom plate 31, a long hole 34 extending long along a diagonal line is formed. Further, the split magnet 30A is formed with a protrusion 35 as an operating member protruding therefrom. The protrusion 35 slightly protrudes from the long hole 34 to the outside, and can be operated from the outside of the container body. By pressing the protrusion 35 along the elongated hole 34 with a finger or the like, the split magnet 30A can be moved from the close contact position to the release position.

  The projection 35 may be omitted, and the split magnet 30A may be moved from the close contact position to the release position by inserting a finger into the elongated hole 34.

  When taking out the mold material 15, the holding of the mold material 15 by the split magnet 30A is released by moving the split magnet 30A from the close contact position to the release position against the bias of the spring material 32. By this release, the mold material 15 at the released portion can be pinched with tweezers or the like, and the mold material 15 can be easily taken out from the storage container.

  Instead of urging the spring member 32 to the close contact position, each split magnet 30A may be locked at the close contact position and the release position by a click mechanism (not shown) or the like. In this case, the split magnet 30A is set to the close contact position when the mold material 15 is stored, and the split magnet 30A is set to the release position when the mold material 15 is taken out.

  A part of the bottom plate 31 is interposed as a protective layer 31B between the mold material 15 and the split magnet 30A. The thickness of the protective layer 31B is formed within the range in which the tensile force of the mold material 15 by the magnetic force of the split magnet 30A acts. Alternatively, the protective layer 31B may be omitted, and the mold material 15 may be directly adhered to the split magnet 30A. In addition, in the third embodiment, all of the split magnets 30A are configured to be movable within the storage hole 31A, but it is sufficient if at least one of them is movable. In this case, the remaining split magnets 30A are fixed to the bottom plate 31 at the close contact position.

[Modification 5]
In the modified example 5 shown in FIGS. 14 and 15, the moving direction of the split magnet 40 is perpendicular to the pattern surface 15A. The storage hole 41A is formed near each corner of the rectangular bottom plate 41. The storage hole 41A holds the split magnet 40 movably in a direction orthogonal to the pattern surface 15A. The split magnet 40 is biased upward by a spring member 42. By this urging, the split magnet is brought into close contact with the protective layer 41B and is held at the close contact position (indicated by a solid line) for holding the mold material 15.

  On a side surface of the split magnet 40, an operation protrusion 43 as an operation member is formed to project. In addition, a long hole 44 that is long in the vertical direction is formed on the side surface of the bottom plate 41 at a position corresponding to the operation protrusion 43. By projecting the operation protrusion 43 from the elongated hole 44 to the outside, the split magnet 40 is moved up and down in the storage hole 41A via the operation protrusion 43. By this elevation, the contact position for holding the mold material 15 and the release position for releasing the hold of the mold material 15 (indicated by a chain double-dashed line) are switched. At the release position, the attraction force due to the magnetic force of the split magnet 40 is weakened or lost, and the mold member 15 can be easily picked from the bottom plate 41 and peeled off.

[Modification 6]
In Modification 6 shown in FIGS. 16 and 17, the container body 50 has a double structure of a first bottom plate 51 and a second bottom plate 52, and can be independently opened and closed by hinge portions 48 and 49. The mold material 15 can be placed on the upper first bottom plate 51. A magnet 53 is fixed to the second bottom plate 52 on the lower side. The thickness of the mounting surface 51 </ b> A of the first bottom plate 51 is set within the range in which the attraction force of the mold material 15 by the magnetic force of the magnet 53 acts. When the mold material 15 is stored, the second bottom plate 52 is in a closed state, and the magnet 53 holds the mold material 15 in close contact with the first bottom plate 51.

  As shown in FIG. 17, when the mold material 15 is taken out, the second bottom plate 52 is opened after the lid 12 is opened. Since the magnet 53 is separated from the mold material 15 by this opening, the holding of the mold material 15 by the magnetic force of the magnet 53 is released. Therefore, the mold material 15 can be peeled off from the first bottom plate 51. As described above, the container body 50 has the double structure of the first bottom plate 51 and the second bottom plate 52, and by opening the second bottom plate 52, it is possible to suppress dust generation due to rubbing between the container body 50 and the mold member 15. . Furthermore, by placing an O-ring (not shown) between the lid 12 and the container body 50 to form a closed structure, it is possible to prevent moisture and dust from entering from the outside, and thus a thin pattern having a fine pattern is provided. It is suitable for long-term storage of the mold material 15 such as the electric mold.

[Modification 7]
In Modified Example 7 shown in FIGS. 18 and 19, two divided magnets 61A and 61B obtained by dividing the magnet 53 of Modified Example 6 into two, for example, are used. One split magnet 61A is fixed to the bottom plate 60. The other split magnet 61B is fixed to the movable bottom plate 62. The movable bottom plate 62 is attached to the bottom plate 60 by a hinge portion 63 so as to be openable and closable. Therefore, when the movable bottom plate 62 is rotated downward by the hinge portion 63 to open the movable bottom plate 62, the other split magnet 61B is lowered and a gap 64 is formed between the movable bottom plate 62 and the mold material 15. The gap 64 releases the holding of the mold material 15 by the split magnet 61B, and the mold material 15 can be peeled off from the bottom plate 60.

[Modification 8]
In the modified example 8 shown in FIG. 20, a split magnet 65 corresponding to the split magnet 61B of the modified example 7 is formed from a magnet sheet. The split magnet 65 has flexibility, only the rear end portion 65A is fixed to the bottom plate 60, and the tip end portion 65B is attached so as to be separated from the bottom plate 60. A knob 66 is formed on the tip 65B so as to project therefrom. The tip end portion 65B including the grip portion 66 constitutes a separating portion. Therefore, instead of the movable bottom plate 62 of the modified example 7, by pulling the split magnet 65 downward with the grip portion 66 of the separated portion, a gap 67 is formed between the split magnet 65 and the mold material 15, and the split magnet is formed. The holding of the mold material 15 by 65 is released.

  It should be noted that, although illustration is omitted, one magnet may be configured by a magnet sheet instead of configuring the split magnet 65 by a magnet sheet. Also in this case, as in the case of the split magnet 65, the magnet sheet can be separated from the mounting surface by pulling one end portion or the corner portion of the magnet sheet downward.

[Fourth Embodiment]
The fourth embodiment shown in FIGS. 21 and 22 is a mold material container 69 in which the interlocking mechanism 70 displaces the magnet 71 from the close contact position to the release position according to the opening / closing operation of the lid 12. The interlocking mechanism 70 sets the magnet 71 to the release position when the lid 12 is open, and sets the magnet 71 to the close contact position when the lid 12 is closed.

  The interlocking mechanism 70 includes an arm 72 and a swing plate 73. The arm 72 is provided so as to project obliquely from the lid 12 near the hinge portion 74. An engagement pin 72A is provided at the tip of the arm 72 so as to project orthogonally to the arm 72. The swing plate 73 is an end portion of the bottom plate 75 opposite to the hinge portion 74, and is swingably attached to the bottom plate 75 via a mounting shaft 76. A magnet 71 is fixed to the bottom plate 75. The swing plate 73 has a recess 73B formed on the bottom surface. The magnet 71 is housed in the recess 73B. The tip of the swing plate 73 has a long hole 78, and the engagement pin 72A is engaged in the long hole 78.

  As shown in FIG. 22, when the lid 12 is displaced from the closed state to the open state, the swing plate 73 is lifted via the arm 72 and the engagement pin 72A. The mounting surface 73A of the rocking plate 73 is separated from the magnet 71 by the rocking caused by the lifting. Therefore, the mold material 15 on the mounting surface 73A loses the attraction force by the magnetic force, and the mold material 15 can be taken out from the swing plate 73.

  When the mold material 15 is stored in the mold material storage container 69, the mold material 15 is placed on the mounting surface 73A of the swing plate 73 and the lid 12 is closed. When the lid 12 is closed, as shown in FIG. 21, the mold material 15 on the mounting surface 73A is pulled by the magnetic force of the magnet 77 fixed to the bottom plate 75, and the mold material 15 is held on the mounting surface 73A.

[Fifth Embodiment]
The mold material container 81 of the fifth embodiment shown in FIG. 23 holds a mold material 80 such as a quartz mold or a silicon mold that is not a magnetic body. In this case, the mold material 80 is held by using the mold material storage container 10 and the holding plate 82 of the first embodiment shown in FIG. The holding plate 82 is made of iron, for example, and has a ring shape, and is plated with chrome. The outer diameter D3 of the holding plate 82 is larger than the outer diameter D1 of the mold material 80, and the inner diameter d3 is larger than the diameter d1 of the pattern surface 15A of the mold material 80. The holding plate 82 is the first magnetic body, and the rectangular magnet 13 is the second magnetic body. The mold material 80 is sandwiched by the magnetic force between the holding plate 82 as the first magnetic body and the magnet 13 as the second magnetic body.

  The holding plate 82 may be a magnet instead of the magnetic body. Further, instead of the magnet 13 fixed to the bottom plate 11A, a magnetic body made of, for example, iron may be used. In this case, the holding plate 82 is composed of a magnet. When avoiding contact between the pattern surface 15A and the first magnetic body or the second magnetic body, the inner diameter d3 of the opening larger than the diameter d1 of the pattern surface 15A is formed on the magnetic body side in contact with the pattern surface 15A. Instead of the opening, a groove or a recess may be formed to avoid contact with the pattern surface 15A. Further, instead of the opening, the groove, or the recess, a protective sheet may be interposed between the pattern surface 15A and the magnetic body.

[Sixth Embodiment]
The mold material container 90 of the sixth embodiment shown in FIG. 24 uses an electromagnet 91 as a magnet. For this reason, the container body 94 has a control circuit 92 for controlling ON / OFF of the electromagnet 91 and a battery power source 93. The electromagnet 91 is configured to be thin and has a mounting surface 91 </ b> A on which the entire surface of the mold material 15 is mounted. The control circuit 92 has an operation switch 95. The control circuit 92 energizes the electromagnet 91 when the operation switch 95 is turned on by operating the operation knob 95A. When the molding material 15 is placed on the mounting surface 91A in this state, the molding material 15 is brought into close contact with the mounting surface 91A by the electromagnet 91. When the operation switch 95 is turned off, the energization of the electromagnet 91 is cut off and the holding of the mold material 15 is released.

  The electromagnet 91 may be a split magnet divided into a plurality in the panel surface direction of the mold material 15. In this case, the holding force of the mold material 15 may be partially lost or weakened by individually performing ON / OFF and current control for the plurality of divided magnets to facilitate the removal of the mold material 15.

  Further, the electromagnet 91 may be ON / OFF controlled in conjunction with opening / closing of the lid 12. For example, the electromagnet 91 is turned off when the lid 12 is opened, and the electromagnet 91 is turned on when the lid 12 is closed. The mounting surface 91A is the surface of the electromagnet 91, but a protective sheet or a protective layer formed by the container body 94 may be interposed between the mounting surface 91A and the mold material 15.

  The present invention is not limited to the above embodiments and modifications, and various modifications are possible without departing from the spirit of the present invention, such as a combination of the above embodiments and modifications. is there.

10 Mold Material Storage Container 11 Container Main Body 11A Bottom Plate 11B Side Plate 11C Side Plate 12 Lid 13 Magnet 13A Mounting Surface 15 Mold Material 15A Pattern Surface 15B Outer Edge 15C Non-contact Part 17 Hinge 18 Locking Claw 19 Locking Protrusion 21 Protective Sheet 22 , 25, 26, 28 Magnet 28A Groove 30A Split magnet 31 Bottom plate 31A Storage hole 31B Protective layer 32 Spring material 34 Long hole 35 Protrusion 40 Split magnet 41 Bottom plate 41A Storage hole 41B Protective layer 42 Spring material 43 Operation projection 44 Long hole 48, 49 hinge part 50 container body 51 first bottom plate 51A mounting surface 52 second bottom plate 53 magnet 60 bottom plates 61A, 61B split magnet 62 movable bottom plate 63 hinge part 64 gap 65 split magnet 65A rear end part 65B tip part 66 pick part 67 gap 69 type material container 70 interlocking mechanism 71 Gunet 72 Arm 72A Engaging pin 73 Oscillating plate 73A Mounting surface 73B Recessed portion 74 Hinge portion 75 Bottom plate 76 Mounting shaft 77 Magnet 78 Long hole 80 Mold 81 Mold material storage container 82 Holding plate 90 Mold material storage container 91 Electromagnet 91A Mounting surface 92 Control circuit 93 Power supply 94 Container body 95 Operation switches D1, D2, D3 Outer diameter d1 Diameter d3 Inner diameter

Claims (9)

A container body having a mounting surface on which a mold made of a magnetic material is mounted;
A lid that is openably and closably attached to the container body and covers the mold member,
A magnet that brings the mold material into close contact with the mounting surface by magnetic force ,
The mold material has a pattern surface and an outer peripheral edge portion surrounding the pattern surface, and the outer peripheral edge of the placing surface is located inside the outer peripheral edge portion of the mold material and outside the outer peripheral edge of the pattern surface. A mold material storage container. A container body having a mounting surface on which a mold made of a magnetic material is mounted;
A lid that is openably and closably attached to the container body and covers the mold member,
A magnet that brings the mold material into close contact with the mounting surface by magnetic force ,
The mold material has a pattern surface and an outer peripheral edge portion surrounding the pattern surface, and a groove, a recess, or a notch that forms a gap between the pattern material and the outer peripheral edge portion is formed in the outer peripheral edge portion of the placing surface. A mold material storage container that has. A container body having a mounting surface on which a mold made of a magnetic material is mounted;
A lid that is openably and closably attached to the container body and covers the mold member,
A magnet that brings the mold material into close contact with the mounting surface by magnetic force ,
Between a close contact position where the magnet is brought close to the mold material to bring the mold material into close contact with the mounting surface, and a release position where the magnet is separated from the mold material to release the close contact of the mold material with the mounting surface. A mold material storage container having a magnet displacement portion that is displaced by . The magnet is a set of a plurality of divided magnets divided in a direction parallel to the mounting surface,
The mold material container according to claim 3 , wherein at least one of the divided magnets is displaced between the close contact position and the release position by the magnet displacement portion. The mold material storage container according to claim 3 or 4 , wherein the magnet displacement portion has a storage hole for movably holding the magnet in the contact position and the release position. The mold material container according to any one of claims 3 to 5 , wherein the magnet has an operation member operable from the outside of the container body. The mold material storage container according to claim 3 , further comprising an interlocking mechanism that sets the magnet to the close contact position when the lid is open and sets the magnet to the release position when the cover is closed. A container body having a mounting surface on which a mold made of a magnetic material is mounted;
A lid that is openably and closably attached to the container body and covers the mold member,
A magnet that brings the mold material into close contact with the mounting surface by magnetic force ,
The magnet is a flexible magnet sheet,
The magnet sheet is a mold material storage container having a separating part for separating a part of the magnet sheet from the mold material from the outside of the container body . A container body having a mounting surface on which the mold material is mounted,
A lid that is openably and closably attached to the container body and covers the mold member,
At least one of which is a magnet, and which holds the mold member on the placing surface by magnetic force.
A magnetic body and a second magnetic body ,
The mold material has a pattern surface and an outer peripheral edge portion surrounding the pattern surface, and the first magnetic body or the second magnetic body facing the pattern surface maintains a non-contact state with a portion facing the pattern surface. A mold material container having a concave portion or a notch portion that forms a gap .

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