JP2006205303A - Method of manufacturing mold and forming mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a mold, and a forming mold capable of setting the arranging direction of a recessed part or a projection part of the mold in the desired direction. <P>SOLUTION: A mark 112 for indicating the arranging direction on design of the recessed part, is formed in advance on a base material 10 of the forming mold. This mark 112 is imaged by an imaging means 34, and dislocation between the indicating direction of the mark 112 and the moving direction of a Y stage 42 and an X stage 43 of a jig 4 is detected. When the dislocation is a predetermined value or more, an inclination of the base material 10 is adjusted by rotatingly driving a rotary stage body 442 of a rotary stage 44 of the jig 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a molded article and a mold.

  Conventionally, when manufacturing a molded product having a plurality of recesses or projections formed in a matrix on the surface, for example, a mold for manufacturing a lens array, a tool for processing the recesses or projections A processing machine provided with a holding portion disposed opposite to the tool is used. Hold the jig with the base material fixed to the holding part of the processing machine, and adjust the position of the base material by driving the jig stage along the arrangement direction of the concave parts or convex parts. The parts are sequentially formed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-179601 (pages 3 to 5 and FIG. 1)

Thus, when the jig stage is moved along the arrangement direction of the recesses or projections and the recesses or projections are sequentially processed, the design arrangement direction of the recesses or projections of the base material and the healing direction are determined. If the moving direction of the tool stage does not match, the arrangement direction of the recesses or projections with respect to the outer periphery of the mold is not a desired direction, and the arrangement direction of the depressions or projections is inclined.
If a lens array is manufactured using a mold in which the arrangement direction of the concave portions or the convex portions is inclined with respect to the outer peripheral portion, a lens array in which the arrangement direction of the small lenses is inclined with respect to the outer peripheral portion is formed.
When mounting a lens array on an optical device, the lens array is set based on the outer shape of the lens array. Therefore, if a lens array with a small lens arrangement direction is mounted, the optical axis of the lens array is at the desired position. Therefore, there arises a problem that the brightness of the optical device cannot be improved.

  The objective of this invention is providing the manufacturing method of a molded article, and a shaping | molding die which can make the arrangement direction of the recessed part or convex part of a molded article into a desired direction.

  The method for manufacturing a molded product according to the present invention is a method for manufacturing a molded product in which a plurality of concave portions or convex portions are arranged in a matrix on the surface, and the array of the concave portions or convex portions is provided on the base material surface of the molded product. A mark forming step for forming a mark indicating a direction, and a processing step for processing the concave portion or the convex portion on the surface of the base material of the molded product using a processing machine, wherein the processing machine is capable of rotating the base material. And a processing portion that forms a concave portion or a convex portion by cutting or grinding on the surface of the base material held by the holding portion, and the base material is connected to the holding portion via a jig. The jig, which is attached, has a stage for moving the base material along the direction of arrangement of the concave or convex portions, and a rotary stage provided on the stage. Attach the base material to a jig and form it in the mark forming process. The deviation between the mark and the moving direction of the stage of the jig is detected, and based on the detection result, the rotating stage is driven to rotate the base material, and the arrangement direction of the concave or convex portions of the base material A base material moving direction adjusting step is performed in which the moving direction of the stage of the jig substantially coincides.

The molded product of the present invention may have concave portions arranged in a matrix, or may have convex portions arranged in a matrix.
According to the present invention, the mark indicating the arrangement direction of the concave portion or the convex portion is formed on the base material. In the processing step, the base material is attached to the stage of the jig and formed in the mark forming step. The deviation between the marked mark and the moving direction of the stage of the jig is detected, and based on the detection result, the rotating stage is driven to rotate, the base material is rotated, and the arrangement direction of the concave or convex portions of the base material And the moving direction of the jig stage substantially coincide with each other, so that the arrangement direction of the concave portions or the convex portions formed in the base material can be set as a desired direction.
For example, when the molded product is a molding die for manufacturing a lens array, a molding die in which concave portions or convex portions are arranged in a desired direction with respect to the outer peripheral portion of the molding die can be obtained.
When a lens array is manufactured using this mold, the arrangement direction of the small lenses becomes a desired direction with respect to the outer periphery of the lens array. Therefore, when such a lens array is mounted on an optical apparatus, It does not cause a decrease in brightness due to a shift in the arrangement direction.

In the present invention, a mark indicating the moving direction of the stage is formed on the stage of the jig, and the jig is attached to a holding part of a processing machine before the base material moving direction adjustment step, and the stage The deviation between the direction indicated by the mark formed on the vertical direction and / or the horizontal direction is detected, and the moving direction of the stage and the vertical direction and / or the horizontal direction are substantially matched based on the detection result. Is preferred.
In the present invention, the stage moving direction is set to the vertical direction and / or the horizontal direction based on the marks formed on the stage, so that the tilt of the stage can be easily adjusted.

  Furthermore, in the present invention, the jig contacts the stage fixed to the holding part of the processing machine, the stage slidably provided on the base, and positions the stage. A positioning portion, and between the base material moving direction adjustment step and the processing step, one of the positions corresponding to the center of the concave portion or convex portion of the surface of the base material is a reference position And an adjustment spacer according to the distance between the reference position of the base material and the position corresponding to the center of the other concave or convex portion is prepared. And adjusting the rotation axis of the holding portion and the center of the concave portion or convex portion of the base material surface by sliding the stage and bringing the positioning portion into contact with the stage via the adjustment spacer. It is preferable to implement.

According to the present invention, an adjustment spacer is prepared in accordance with the distance between the reference position facing the processing center of the concave or convex portion on the surface of the base material and the position corresponding to the processing center of another concave or convex portion. Then, after the reference position and the rotation axis of the holding portion are matched, the stage is slid and the stage and the positioning portion are brought into contact with each other via the adjustment spacer. The position corresponding to the processing center of the concave portion or the convex portion on the surface of the base material can be exactly matched.
In this manner, the stage and the positioning portion are brought into contact with each other via the adjustment spacer, that is, the rotation shaft of the holding portion and the concave portion or the convex portion of the base material are simply sandwiched between the stage and the positioning portion. Since the position corresponding to the machining center can be made coincident with each other, the stage can be positioned quickly and easily without trouble.
Since the stage can be positioned quickly in this way, the manufacturing time of the molded product can be shortened.

The molding die of the present invention is a molding die for molding a lens array, and is a molding die in which concave portions or convex portions corresponding to small lenses arranged in a matrix shape of the lens array are formed on the molding surface, It is manufactured by any of the manufacturing methods described above.
Since the shaping | molding die of this invention is manufactured by the manufacturing method in any one of the above-mentioned, it becomes a shaping | molding die in which the recessed part or the convex part was arranged along the desired direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Configuration of mold]
FIG. 1 shows a mold 1 of the present embodiment.
The mold 1 has a molding surface (surface) 11 formed with a plurality of recesses 111. The concave portions 111 are arranged in a matrix, and are arranged in, for example, 6 rows × 4 columns, where rows are arranged in a row and columns are arranged in a row.
The mold 1 is a mold used for manufacturing the lens array 8 (see FIG. 15), and the concave portion 111 corresponds to the small lens 81 of the lens array 8.
The molding die 1 has a substantially rectangular shape on a plane, and at the four corners of the molding surface 11, cross-shaped marks 112 indicating the arrangement direction of the recesses 111 are formed. The mark 112 is formed in a concave shape, and one side 112A of the mark 112 is substantially parallel to one direction of the array of the recesses 111, and the other side 112B is the other side of the array of the recesses 111. It is substantially parallel to the direction.

[Processing machine configuration]
FIG. 2 shows a processing machine 3 for manufacturing the mold 1.
The processing machine 3 includes a holding unit 31 that holds the base material 10 of the mold 1 and a processing unit 32 that processes the recess 111 on the surface of the base material 10.
Here, the base material 10 refers to a material in which the concave portion 111 having a complete shape is not formed on the molding surface of the mold 1.
The holding unit 31 of the processing machine 3 is formed in a columnar shape extending toward the processing unit 32 side, and a jig in which the base material 10 is attached to a circular surface 311 (see FIG. 4) on the processing unit 32 side. 4 is attached.
The holding portion 31 is supported by a support portion 33 provided on the base end side (the side opposite to the surface 311). The holding portion 31 can be advanced and retracted along the Z axis, and is configured to advance and retract with respect to the disc-type grindstone 321 of the processing portion 32. In addition, the holding portion 31 is configured to be rotatable in the direction of the arrow R1 or the counter arrow R1 with the central axis passing through the center of the circular surface 311 of the holding portion 31 as the rotation axis 312. The rotating shaft 312 of the holding unit 31 is parallel to the Z axis.

The processing unit 32 includes a disc-type grindstone 321 as a tool, a grindstone shaft 322 to which the disc-type grindstone 321 is attached, and a bearing portion 323, and the grindstone shaft 322 is rotated at the end of the processing unit 32. A motor unit (not shown) is provided.
In addition, the processing part 32 of this embodiment is provided with the disk-type grindstone 321 and grinds the surface of the base material 10 to form the recess 111. However, the present invention is not limited to this, for example, as shown in FIG. Instead of the disk-type grindstone 321, a processing unit 32 ′ including a cutting tool 321 ′ may be used. The cutting tool 321 ′ includes a substantially circular disk portion 321A ′ and a cutting portion 321B ′ provided on the disk portion 321A ′ and protruding outward. By using such a cutting tool 321 ′, it is possible to form the recess 111 on the surface of the base material 10 by cutting.
Alternatively, the bite base may be fixed to the bearing portion 323 and the recess 111 may be cut.
The grindstone shaft 322 is movable in two directions orthogonal to the advancing / retreating direction of the holding portion 31, that is, in the Y-axis direction and the X-axis direction. Further, the axial direction of the grindstone shaft 322 and the Y-axis direction are parallel.

Therefore, the disc-type grindstone 321 attached to such a grindstone shaft 322 can move in the Y-axis direction and the X-axis direction, and the axis along the Y-axis as the grindstone shaft 322 rotates is used as a rotation axis. It can be rotated.
In such a processing machine 3, the base material 10 is rotated by the holding unit 31 and the base material 10 is moved along the Z-axis direction. Further, while rotating the disc type grindstone 321, the disc type grindstone 321 is brought into contact with the surface of the base material 10, and the disc type grindstone 321 is moved in the Y axis direction and the X axis direction. In this way, the recess 111 is formed in the base material 10.
When grinding is performed, a grinding liquid (not shown) is supplied between the disk-type grindstone 321 and the surface of the base material 10.
The arrangement direction of the concave portions 111 formed in a matrix by such a processing machine 3 is along the X-axis direction and the Y-axis direction of the processing machine 3.
An imaging means 34, for example, a CCD camera or the like is attached to the grindstone shaft 322 of the processing machine 3. The imaging unit 34 is for imaging the mark 112 of the base material 10 attached to the holding unit 31.

[Jig configuration]
The jig 4 for attaching the base material 10 to the holding portion 31 of the processing machine 3 will be described with reference to FIGS. 2 and 4 to 8.
The jig 4 is fixed to the surface 311 of the holding portion 31 and has a base mounting plate 40 to which the base 41 is mounted, a base 41 to be mounted on the base mounting plate 40, and the base 41 on the Y axis direction. A Y stage (first stage) 42, a X stage (second stage) 43 sliding on the Y stage 42 along the X-axis direction, and a rotary stage 44 fixed on the X stage 43. A positioning unit 45Y for positioning the Y stage 42, a positioning unit 45X for positioning the X stage 43, and a spacer 46 (see FIGS. 7 and 8).

The base mounting plate 40 has a substantially circular shape when viewed from the Z-axis direction, and the base 41 is fixed to the surface of the base mounting plate 40 on the side opposite to the surface 311 side with screws.
The base 41 has a substantially rectangular planar shape, and a groove 411 that extends along the Y-axis direction and is recessed toward the holding portion 31 is formed on the surface of the base 41 on the Y stage 42 side. The side surface of the base portion 41 is a surface substantially parallel to the X axis or the Y axis in FIG.
Similarly to the base portion 41, the Y stage 42 has a substantially rectangular shape when viewed from the Z-axis direction. The Y stage 42 includes a planar rectangular first member 42A installed on the base 41, a planar substantially rectangular second member 42B installed on the first member 42A, and a contact portion 42C. ing.
The first member 42A and the second member 42B are fixed and integrated with a screw, and the side surfaces of the first member 42A and the second member 42B are substantially parallel to the X axis or the Y axis. . Here, of the four side surfaces of the first member 42A, one side surface 42A2 along the sliding direction is defined, and the other side surface is defined as 42A3 (see FIG. 5). Of the four side surfaces of the second member 42B, one side surface orthogonal to the sliding direction is a side surface 42B1 (see FIG. 5), and the other side surface is 42B3.

A rail portion 42A1 that extends along the Y-axis direction and protrudes toward the base portion 41 side is formed on the surface of the first member 42A on the base portion 41 side. The rail portion 42A1 is fitted into the groove portion 411 of the base portion 41 and slides in the groove portion 411 along the Y-axis direction. As shown in FIGS. 6 to 8, the first member 42 </ b> A is slidable only from the initial state in which the first member 42 </ b> A is not slid toward the opposite arrow Y <b> 1, and is biased by a spring or the like (not shown). By means, it is urged in the direction of arrow Y1. That is, the Y stage 42 can slide only in one direction from the initial state.
2 and 4, a groove 42B2 extending in the X-axis direction is formed on the surface of the second member 42B on the X stage 43 side.
The contact portion 42C is a rectangular parallelepiped block, and is attached to one side surface 42A2 along the sliding direction of the first member 42A. The abutting portion 42C is formed with a substantially hemispherical contact portion 42C1 protruding along the sliding direction of the first member 42A.

Similarly to the Y stage 42 and the base portion 41, the X stage 43 has a planar rectangular shape when viewed from the Z-axis direction. The X stage 43 includes a stage main body 43A and a contact portion 43B.
The stage main body 43A is provided on the Y stage 42, and a rail 43A1 extending along the X-axis direction and protruding toward the Y stage 43 is formed on the surface of the stage main body 43A on the Y stage 42 side. ing. The rail portion 43A1 is fitted into the groove portion 42B2 of the Y stage 42 and slides in the groove portion 42B2.
The four side surfaces of the stage main body 43A are substantially parallel to the X axis or the Y axis in FIG. 2, and one side surface along the sliding direction of the stage main body 43A is a side surface 43A2. The other side surface along the direction is referred to as a side surface 43A3.
As shown in FIGS. 6 to 8, the stage main body 43A is slidable only in the direction opposite to the arrow X1 from the initial state where the stage main body 43A is not slid, and is urged by a biasing means such as a spring (not shown). , Is biased in the direction of the arrow X1. That is, the X stage 43 can slide only in one direction from the initial state.
As shown in FIGS. 2 and 4, the abutting portion 43B is a rectangular parallelepiped block, and is attached to one side surface 43A2 along the sliding direction of the stage main body 43A. The contact portion 43B is also formed with a substantially hemispherical contact portion 43B1 (see FIG. 6).

  A screw 47 as a fixing member is attached to one side surface 43A3 (the lower surface in FIG. 2) along the sliding direction of the X stage 43 as shown in FIG. A screw 47 attached to the X stage 43 is formed on the side surface 43A3 and is inserted into a screw hole 43A4 (see FIG. 4) extending along the Y-axis direction of the X stage 43. The screw 47 is for bringing a positioning plate 48 for positioning the X stage 43 into contact with the side surface 43A3 of the X stage 43. The positioning plate 48 is fixed to the side surface 42B1 of the Y stage 42, and the tip protrudes to the side surface 43A3 of the X stage 43. A long hole 481 along the sliding direction of the X stage 43 is formed at the tip of the positioning plate 48, and the screw 47 is inserted into the screw hole 43A4 through the long hole 481. As a result, the positioning plate 48 fixed to the second member 42B of the Y stage 42 comes into contact with the side surface 43A3 of the X stage 43 in a plane, and the X stage 43 is fixed to the Y stage 42. .

  Similarly, the Y stage 42 is positioned by a screw 47 and a positioning plate 48. As shown in FIG. 5, the screw 47 extends along the Y-axis direction formed on the side surface 42A3 of the first member 42A. It is inserted into the screw hole 42A31. The positioning plate 48 is fixed to the side surface of the base 41 along the sliding direction of the Y stage 42, and the tip protrudes to the side surface 42 </ b> A <b> 3 along the sliding direction of the first member 42 </ b> A of the Y stage 42. A long hole 481 is formed in the positioning plate 48 along the sliding direction of the Y stage 42, and the screw 47 is inserted into the screw hole 42A31 via the long hole 481. As a result, the positioning plate 48 fixed to the base 41 is pressed against the side surface 42A3 of the first member 42A of the Y stage 42 so that the Y stage 42 is fixed to the base 41.

The rotary stage 44 has a planar circular shape when viewed from the Z-axis direction. The rotary stage 44 includes a base 441 fixed on the X stage 43 and a rotary stage main body 442 installed on the base 441.
The rotary stage main body 442 is rotatably supported by the base 441 and is driven to rotate about a rotation axis parallel to the rotation axis 312.
A scale is attached to the side surface of the rotary stage main body 442 and the side surface of the base 441 so that the amount of rotation of the rotary stage main body 442 can be grasped.
A clamp (not shown) is attached to the side surface of the rotary stage main body 442, and the rotary stage main body 442 can be fixed to the base 441 by pushing the clamp into the rotary stage main body 442.
Of the pair of circular surfaces of the rotary stage main body 442, a step portion 442A that rises toward the base material 10 side is formed on the surface opposite to the base 441 (surface on which the base material 10 is attached). The step portion 442A has a substantially fan-shaped plane, and the angle formed by the step surface rising toward the base material 10 is approximately 90 °. The step surface of the stepped portion 442A is formed along two orthogonal sides of the outer peripheral edge of the base material 10 when the base material 10 is installed at the center of the plane of the circular surface of the rotary stage main body 442. .

A base material fixing member 443 for fixing the base material 10 is attached to the one circular surface of the rotary stage main body 442 as shown in FIGS. 2 and 4 to 8. The base material fixing member 443 is disposed along the step portion 442A, and the first fixing member 443A, the second fixing member 443B, and the side surface orthogonal to the base material 10 are fixed to the rotary stage main body 442. A third fixing member 443C for contacting and fixing the first fixing member 443A and the second fixing member 443B.
The third fixing member 443C includes a screw portion 443C1 having a screw engraved around it, a fixing member body 443C2 attached to the tip of the screw portion 443C1, and a screwing portion 443C3 into which the screw portion 443C1 is screwed. The distal end of the fixing member main body 443C2 is cut at a substantially right angle, and the notched portion 443C4 comes into contact with the corner portion of the base material 10 by screwing the screw portion 443C1 into the screwed portion 443C3. Accordingly, the base material 10 is sandwiched between the third fixing member 443C, the first fixing member 443A, and the second fixing member 443B.
The screwing portion 443C3 is fixed to the rotary stage main body 442.
Of the surface of the base material 10 fixed by such a base material fixing member 443, the outer shape center position P1 of the portion where the lens array 8 is molded and the center position of the circular surface to which the base material 10 of the rotary stage body 442 is attached. Is consistent.

As shown in FIGS. 2 and 4 to 8, the positioning portion 45 </ b> Y positions the Y stage 42. The positioning portion 45Y is fixed to a block 412 attached to a side surface 41A along the sliding direction of the Y stage 42 of the base 41, and in other words, the direction along the sliding direction of the Y stage 42, in other words, the Y stage. 42 abuts against the abutting portion 42C of the Y stage 42 from a direction facing the urging direction of 42 (a direction facing the arrow Y1 in FIG. 6).
The positioning portion 45Y is a so-called micrometer head, and includes a spindle 451 that abuts against the contact portion 42C1 of the abutting portion 42C of the Y stage 42, and a thimble 452 that is provided to rotate integrally with the spindle 451. , And a sleeve 453 through which the spindle 451 is inserted.
A female screw (not shown) is provided on the inner periphery of the sleeve 453, and the female screw is screwed to the spindle 451. Accordingly, the spindle 451 advances and retreats along the Y-axis direction by screwing rotation. Although not shown, a main scale is provided on the outer surface of the sleeve 453.
The thimble 452 has a cylindrical shape that covers the outside of the sleeve 453 in a cylindrical shape. The thimble 452 and the spindle 451 are configured to rotate integrally. A vernier scale (not shown) for equally dividing the circumference is provided on the outer surface on one end side of such a thimble 452.
In such a positioning part 45Y, the spindle 451 advances and retreats along the sliding direction of the Y stage 42 by rotating the thimble 452. The tip of the spindle 451 comes into contact with a contact portion 42C fixed to the Y stage 42 to position the Y stage 42.

The positioning unit 45X is for positioning the X stage 43.
The configuration of the positioning unit 45X is the same as that of the positioning unit 45Y. The positioning portion 45X is attached to a block 424 fixed to a side surface 42B3 orthogonal to the sliding direction of the second member 42B of the Y stage 42. The spindle 451 of the positioning unit 45X can be moved back and forth in the X-axis direction. In other words, from the direction along the sliding direction of the X stage 43, in other words, the direction facing the biasing direction of the X stage 43 (FIG. 6). Abutting on the abutting portion 43B of the X stage 43 from the direction of arrow X1).

  As shown in FIGS. 7 and 8, the spacer 46 is sandwiched between the positioning portion 45X and the contact portion 43B of the X stage 43 or between the positioning portion 45Y and the contact portion 42C of the Y stage 42. It is what is done. The spacer 46 is a rectangular parallelepiped having a substantially rectangular shape, and includes an adjustment spacer 461 and an origination spacer 462. The contact surface of the spacer 46 with the positioning portions 45X and 45Y has a square shape of 10 mm × 10 mm, for example.

The adjustment spacer 461 is a design distance between the reference position P0 on the surface of the base material 10 and the position corresponding to the processing center of each recess 111 corresponding to the small lens 81, that is, the position corresponding to the optical center of the small lens 81. Width dimension T according to
Here, in the present embodiment, the reference position P0 of the base material 10 is the processing center (small lens) of the leftmost concave portion 111 in the uppermost row in the arrangement of the concave portions 111 formed corresponding to the arrangement of the small lenses 81. The position corresponding to the optical center 81). The reference position P0 of the base material 10 is located at the rearmost end in the biasing direction of the X stage 43 and the Y stage 42 in the arrangement of the recesses 111.
The adjustment spacer 461 positions the X stage adjustment spacer 461X inserted between the tip of the spindle 451 of the positioning portion 45X for positioning the X stage 43 and the contact portion 43B of the X stage 43, and the positioning of the Y stage 42. The Y-axis direction adjusting spacer 461Y is inserted between the tip of the spindle 451 of the positioning part 45Y that performs the above and the abutting part 42C of the Y stage 42.
In the present embodiment, since the small lenses 81 of the lens array 8 are arranged in 6 rows × 4 columns, the lens array 8 includes three types of X-axis direction adjustment spacers 461X and five types of Y-axis direction adjustment spacers 461Y. Yes.
Here, the X-axis direction adjusting spacer 461X is changed from No. 1 spacer, no. 2 spacer, no. Three spacers are used.
More specifically, no. One spacer has a width dimension along the X-axis direction from the reference position P0 to the processing center of the recesses 111 in the second row. No. The two spacers have a width dimension along the X-axis direction from the reference position P0 to the processing center of the recesses 111 in the third row. No. The three spacers have a width dimension along the X-axis direction from the reference position P0 to the processing center of the recesses 111 in the fourth row.
Further, the Y-axis direction adjusting spacer 461Y is changed from No. 5 spacer, No. 5 6 spacer, No. 6 7 spacer, no. 8 Spacer, No. 9 spacers are used.
No. The five spacers have a width dimension along the Y-axis direction from the reference position P0 to the processing center of the recess 111 in the second row. No. 6 spacer, No. 6 7 spacer, no. 8 Spacer, No. The 9 spacers each have a width dimension along the Y-axis direction from the reference position P0 to the processing center of the concave portion 111 in the third row, the fourth row, the fifth row, and the sixth row.

The origin-departing spacer 462 has a width dimension corresponding to the distance between the outer shape center position P1 of the portion of the surface of the base material 10 where the lens array 8 is molded and the reference position P0 of the base material 10. The origin-seeking spacer 462 includes an X-axis origin finding spacer 462X that is inserted between the tip of the spindle 451 of the positioning portion 45X that positions the X stage 43 and the contact portion 43B of the X stage 43, and the Y stage. Y-axis direction origin spacer 462Y inserted between the tip of spindle 451 of positioning portion 45Y for positioning 42 and contact portion 42C of Y stage 42.
Here, the X-axis direction origin positioning spacer 462X is set to No. No. 4 spacer, Y-axis direction origin spacer 462Y 10 spacers are used. No. The width dimension T _0X of the 4 spacer is No. No. 1 spacer width and No. 2 is a width dimension substantially in the middle of the width dimension of the spacer. The width dimension _T0y of the 10 spacer is No. 6 spacer width dimension, 7 is a width dimension substantially in the middle of the width dimension of the spacer.

FIG. 9 shows the relationship between the spacers such as the adjustment spacer 461 and the origination spacer 462 as described above, and the position serving as the processing center of the recess 111 formed on the surface of the base material 10. Each cell in FIG. 9 corresponds to a recess 111 formed in the base material 10. In FIG. 9, for example, “X: 1” indicates the No. of the X-axis direction adjustment spacer 461X. 1 spacer is inserted between the abutting portion 43B of the X stage 43 and the positioning portion 45X, and “Y: 5” is the No. of the Y-axis direction adjusting spacer 461Y. 5 means that a spacer is inserted between the contact portion 42C of the Y stage 42 and the positioning portion 45Y. “None” means that no spacer is inserted.
When performing the origin search, the No. 4 is placed between the contact portion 43B of the X stage 43 and the positioning portion 45X. No. 4 spacer is inserted, and No. 4 is provided between the contact portion 42C of the Y stage 42 and the positioning portion 45Y. Insert 10 spacers.
Further, for example, when it is desired to form the concave portion 111 in the second row of the second column (second from the left in the second row from the top), between the contact portion 43B of the X stage 43 and the positioning portion 45X, No. No. 1 spacer is inserted, and No. 1 is placed between the contact part 42C of the Y stage 42 and the positioning part 45Y. 5 Insert the spacer.

[Method of manufacturing mold]
The manufacturing method of the shaping | molding die 1 using the above processing machines 3 and the jig | tool 4 is demonstrated with reference to FIG.10 and FIG.11.
First, the mark 112 is formed on the base material 10 (processing S1, mark formation process). One side 112 </ b> A of the mark 112 is formed along one designed arrangement direction of the recesses 111. Further, the mark 112 is formed so that the other side 112B of the mark 112 is along the other designed arrangement direction of the recesses 111.
Next, the base material 10 is attached to the holding part 31 of the processing machine 3 (processing S2).
Specifically, this will be described with reference to the flowchart of FIG.
First, the base attachment plate 40 of the jig 4 is attached to the holding part 31 of the processing machine 3 (Process S2-1).
Next, the base 41, the Y stage 42, and the X stage 43 are attached to the base mounting plate 40 and temporarily fixed (processing S2-2).
Further, the inclination of the base 41, the Y stage 42, and the X stage 43 is examined (processing S2-3).
The dial gauge is brought into contact with the side surfaces of the base 41, the Y stage 42, and the X stage 43, which are located on the upper side of FIG. 2, and in this state, the dial gauge is moved in the X-axis direction to measure the scale fluctuation. To do. The inclination is calculated from the distance the dial gauge is moved and the change in the scale. If the inclination is equal to or greater than a predetermined value, the inclination of the base 41, the Y stage 42, and the X stage 43 is corrected (processing S2-4). ).
Thereafter, the base 41, the Y stage 42, and the X stage 43 are fixed with screws and fixed (process S2-5).
Further, after that, the rotary stage 44 on which the base material 10 is fixed is mounted on the X stage 43 (processing S2-6).
The base material 10 is fixed to the rotary stage 44 as follows.
The first fixing member 443A and the second fixing member 443B are fixed along the step portion 442A of the rotation stage 44. Next, the orthogonal side surfaces of the base material 10 are brought into contact with the first fixing member 443A and the second fixing member 443B and fixed by the third fixing member 443C. Thereafter, the base material 10 is fixed to the rotary stage main body 442 of the rotary stage 44 with screws.
As a result, the center of the plane of the rotary stage 44 coincides with the outer shape center position P1 of the base material 10.
Next, it is confirmed whether or not the base material 10 is tilted with respect to the Y-axis direction and the X-axis direction, that is, the design arrangement direction of the recesses 111 (processing S2-7, base material moving direction adjustment step). ).
In other words, in this base material movement direction adjustment step, the arrangement direction of the recesses 111 of the base material 10 and the movement directions of the stages 42 and 43 for moving the base material 10 are made to coincide.
The processing unit 32 is driven to move the grindstone shaft 322 along the X-axis direction. Thereby, the imaging means 34 fixed to the grindstone shaft 322 moves along the X-axis direction. The imaging unit 34 detects, for example, the upper right and upper left marks 112 in FIG. 2 and detects a shift between the moving direction of the imaging unit 34 and one side 112A (side along the X-axis direction) of the mark 112. . When the deviation is equal to or larger than the predetermined value, the rotary stage 44 is driven to adjust the inclination of the base material 10 (processing S2-8), and the movement direction of the base material 10 and the arrangement direction of the recesses 111 of the base material 10 And approximately match.
Then, the processes S2-7 and S2-8 are repeated until the deviation becomes equal to or less than a predetermined value.
When the deviation is less than or equal to a predetermined value, the rotary stage main body 442 of the rotary stage 44 is fixed to the base 441 (processing S2-9), and as shown in FIG. 10, the reference position P0 of the base material 10 and the holding portion The origin search is performed to match the 31 rotation axis 312 (process S3, origin search step).
Here, an X-axis direction origin spacer 462X is inserted between the contact portion 43B of the X stage 43 and the tip of the spindle 451 of the positioning portion 45X, and the contact portion 42C of the Y stage 42 and the spindle of the positioning portion 45Y. A Y-axis direction origin spacer 462Y is inserted between the tip of 451.
Then, a measuring instrument such as a dial gauge is brought into contact with the side surface of the rotary stage 44. Thereafter, the holding unit 31 is rotationally driven. Since the plane center of the rotary stage 44 and the outer shape center position P1 of the base material 10 coincide with each other, the rotation shaft 312 of the holding unit 31 and the outer shape center position P1 of the surface of the base material 10 are shifted. The value indicated by a measuring instrument such as a dial gauge in contact with the side surface of the rotary stage 44 varies greatly. In this case, the positioning part 45Y and / or the tip of the spindle 451 of the positioning part 45X is advanced and retracted, and the X stage 43 and / or the Y stage 42 of the jig 4 is slid to perform alignment. Then, the X stage 43 and the Y stage 42 are fixed by bringing the positioning plate 48 into contact with the X stage 43 or the Y stage 42 with the screws 47. As a result, the outer center position P1 of the base material 10 and the rotation shaft 312 of the holding portion 31 coincide with each other, and the reference position P0 of the base material 10 and the holding portion 31 The rotation axis 312 matches.
In addition, when the rotating shaft 312 of the holding part 31 and the outer shape center position P1 of the surface of the base material 10 substantially coincide with each other, the value indicated by the dial gauge or the like is substantially constant.

Next, the screw 47 is loosened and the X stage 43 and / or the Y stage 42 is slid to adjust the spacer between the X stage 43 and the positioning portion 45X and / or between the Y stage 42 and the positioning portion 45Y. 461 is sandwiched. For example, here, for example, when forming the recess 111 in the second row of the second column (second from the left in the second row from the top), No. One adjustment spacer 461X is inserted between the contact portion 43B of the X stage 43 and the tip of the spindle 451 of the positioning portion 45X. No. The fifth adjustment spacer 461Y is inserted between the abutting portion 42C of the Y stage 42 and the tip of the spindle 451 of the positioning portion 45Y. As a result, as shown in FIG. 8, the optical axis of the small lens 81 of the lens array 8 on the surface P <b> 2 of the surface of the base material 10, i.e., the position P <b> 2 that is the processing center of the first recess 111. The position P2 corresponding to the center coincides (processing S4, adjustment step).
In order to confirm that the amount of movement of the rotary stage 44 matches the width dimension of the adjustment spacer, the following may be performed.
First, a pair of reference surfaces that are parallel to the X axis and Y axis are formed on the side surface of the rotary stage 44. After the origin finding process is completed, a measuring instrument such as a dial gauge is applied to the reference surface of the rotary stage 44. Then, the position on the X axis and the position on the Y axis of the rotary stage 44 are measured. Then, after the adjustment process is finished, a measuring instrument such as a dial gauge is applied to the reference surface of the rotary stage 44 of the jig 4 to which the base material 10 is fixed, and the movement amount in the X-axis direction and the Y-axis direction is measured. To do. It is confirmed that the movement amounts in the X-axis direction and the Y-axis direction coincide with the width dimensions of the sandwiched adjustment spacers 461X and 461Y.

Thereafter, the recess 111 is formed. Here, rough grinding is performed (processing S5, rough grinding step (processing step)).
Next, the second recess 111 is processed. The X stage 43 and / or the Y stage 42 are slid to adjust the adjustment spacer 461 corresponding to the second recess 111 between the X stage 43 and the positioning unit 45X and / or the Y stage 42 and the positioning unit 45Y. Between them. Then, rough grinding is performed.
Such an operation is repeated until the 24th recess 111 is formed (step S6). It should be noted that there is no need to sandwich the adjustment spacer 461 when the recess 111 having the reference position P0 on the surface of the base material 10 as the processing center is cut.

Next, finish grinding of the recess 111 is performed. Also here, the adjustment process (process S7) similar to the adjustment process (process S4) at the time of rough grinding is performed, and finish grinding is performed (processing process, process S8). Such an operation is performed until the 24th recess 111 is finish-ground (processing S9).
Thereafter, the shape and surface roughness of the recess 111 finish-ground in this way are measured (processing S10). The shape accuracy is measured with a three-dimensional measuring device, and the surface accuracy is measured with a surface roughness measuring device.
Here, the measurement result is compared with the design dimension of the mold 1 to determine whether or not the difference is equal to or less than a predetermined value (processing S11).
If the difference between the measurement result and the design dimension exceeds a predetermined value, finish grinding is performed again. Specifically, an adjustment process (process S7) and a finish grinding process (process S8) are performed. This is repeated until the difference between the measured value and the design dimension becomes a predetermined value or less.
When the difference between the measurement result and the design dimension is not more than a predetermined value, whether or not the deviation of the optical center (optical axis) of the small lens of the lens array formed by the recess 111 is not more than a predetermined value, The concave portion 111 is confirmed by measuring it with a three-dimensional measuring device (processing S12) (processing S13).
When it is confirmed that the deviation of the optical center is equal to or less than a predetermined value (when it is confirmed that the accuracy of the optical axis position is good), the surface of the mold 1 on which the concave portion 111 is formed (molded surface). Surface treatment is performed (processing S14).
When the deviation of the optical center exceeds a predetermined value, finish grinding is performed again, and processing S7 to processing S13 are repeated. This is repeated until the deviation of the optical center becomes a predetermined value or less.

Finally, the mold 1 thus manufactured is inspected.
The mold 1 and the mold constituting the plane side of the lens array are arranged to face each other, and the mold is assembled (process S15). A glass plate (glass material) as a raw material for the lens array is placed between the mold 1 and the mold, and press molding is performed (processing S16).
Next, the positional accuracy of the optical center of the small lens 81 of the lens array 8 manufactured in this way is confirmed. When it is confirmed that the deviation of the optical center of the small lens 81 is not more than a predetermined value, for example, 0.01 mm or less, preferably 5 μm or less (processing S17), the manufacturing of the mold 1 is completed.

[Lens Array Manufacturing Method]
Using the mold 1 manufactured as described above, the lens array 8 is manufactured as follows. This will be described with reference to FIGS.
First, a lower mold 51 in which the molding die 1 is fitted and an upper mold 52 arranged to face the lower mold 51 are prepared.
The lower mold 51 includes a mold 51 </ b> A in which a substantially rectangular planar recess 511 is formed, and a plurality of molds 1.
A plurality of molds 1 are installed in the recess 511 of the mold 51A. For example, in the present embodiment, four molds 1 are installed in the recess 511.
The upper mold 52 has a flat surface on the lower mold 51 side.
Next, as shown in FIG. 13A, the lower mold 51 and the upper mold 52 are spaced apart, and a single glass plate (glass material) 6 between the lower mold 51 and the upper mold 52. Is installed. The glass material 6 is a raw material for the lens array 8.
Then, as shown in FIG. 13B, the glass material 6 is pressed and thermoformed by the lower mold 51 and the upper mold 52. Thereafter, the lower mold 51 and the upper mold 52 are separated from each other, and the molded body 7 is taken out as shown in FIG.
As shown in FIG. 14, the molded body 7 is formed by integrally forming four lens arrays 8. A mark 82 corresponding to the mark 112 is transferred to each lens array 8 of the molded body 7. The lens array 8 can be obtained by dicing such a molded body 7.
By knowing in advance the distance from the mark 82 of the lens array 8 to the cutting line, the cutting line can be detected based on the mark 82 during dicing. For example, at the time of dicing, the mark 82 of the molded body 7 is detected by an imaging means such as a CCD, and the line connecting the marks 82 can be used as a cutting line for dicing.
Through the above steps, the lens array 8 shown in FIG. 15 can be obtained.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) A mark 112 indicating the arrangement direction of the recesses 111 is formed on the base material 10. In the processing step, the base material 10 is attached to the stages 42 and 43 of the jig 4, and the mark 112 and the jig 4 are attached. The deviation of the moving direction of the stages 42 and 43 is detected, and based on the detection result, the rotary stage 44 is driven to rotate, the base material 10 is rotated, and the design arrangement direction of the recesses 111 of the base material 10 And the movement direction of the jig stages 42 and 43 are substantially coincided with each other, so that the arrangement direction of the recesses 111 formed in the base material 10 can be set to a desired direction.
In the present embodiment, since the molded product is the molding die 1 for manufacturing the lens array, the molding die 1 in which the concave portions 111 are arranged in a desired direction with respect to the outer peripheral portion of the molding die 1 can be obtained.
When the lens array 8 is manufactured using the mold 1, the arrangement direction of the small lenses 81 becomes a desired direction with respect to the outer peripheral portion of the lens array 8. Therefore, when such a lens array 8 is mounted on an optical device. In addition, a decrease in brightness due to a shift in the arrangement direction of the small lenses 81 is not caused.

(2) In the present embodiment, when manufacturing the lens array 8, the plurality of molds 1 are fitted into the recesses 511 of the mold 51 </ b> A of the lower mold 51 to obtain a plurality of lens arrays 8 from a single glass material 6. ing. Therefore, the manufacturing efficiency can be increased as compared with the case where the lens arrays are molded one by one.
(3) Further, in the present embodiment, since the cutting line can be detected on the basis of the mark 82 when dicing the molded body 7 in which the plurality of lens arrays 8 are integrally molded, the dicing can be accurately performed. It becomes possible.

(4) A reference position P0 that is one of positions corresponding to the optical center of the small lens 81 of the lens array 8 on the surface of the base material 10 and a position corresponding to the optical center of the other small lens 81. An adjustment spacer 461 corresponding to the distance is prepared, and after aligning the reference position P0 and the rotation shaft 312 of the holding portion 31, the X stage 43, the positioning portion 45X, and / or the Y stage via the adjustment spacer 461. 42 and the positioning portion 45Y are brought into contact with each other, so that the rotation shaft 312 of the holding portion 31 and the position corresponding to the optical center of the small lens 81 of the lens array 8 on the surface of the base material 10 are accurately matched. Can do.
In this manner, the adjustment spacer 461 is simply sandwiched between the X stage 43 and the positioning portion 45X and / or the Y stage 42 and the positioning portion 45Y, and the rotation shaft 312 of the holding portion 31 and the surface of the base material 10 are The position corresponding to the optical center of the small lens 81 of the lens array 8 can be matched, and the positioning of the stages 42 and 43 can be performed quickly and easily.
In addition, since the stages 42 and 43 can be positioned quickly in this way, the manufacturing time of the mold can be shortened.
Furthermore, since the rotation axis 312 of the holding part 31 and the position corresponding to the optical center of the small lens 81 of the lens array 8 on the surface of the base material 10 can be accurately matched, the manufacturing method of this embodiment is used. The positional accuracy of the optical axis of the small lens 81 of the lens array 8 molded by the molded mold 1 can be increased.

(5) In the present embodiment, the origin search spacer 462 corresponds to the distance between the outer shape center position P1 of the base material 10 and the reference position P0. Therefore, the origin search spacer 462 is replaced with the positioning portions 45X and 45Y. The base material 10 is inserted into the stage 42, 43 and the rotation shaft 312 of the holding portion 31 is aligned with the outer shape center position P1 of the base material 10 so that the origin spacer 462 is not sandwiched. The position P0 and the rotation axis 312 of the holding unit 31 coincide with each other.
In such an embodiment, in the origin finding process, the outer shape center position P1 of the base material 10 and the rotation shaft 312 of the holding part 31 are matched, and the base material 10 is attached to the holding part 31 in a balanced manner. Therefore, the origin can be easily obtained.
Further, in the origin setting process, the stages 42 and 43 are slid from the initial state by the width dimension of the origin setting spacer 462 (462X, 462Y). The width dimension T _0X of the X-axis direction origin-departing spacer 462X is the same as the No. of the adjusting spacer 461X. No. 1 spacer width and No. 2 is a width dimension of approximately midway between the width dimension of the spacer, the width _{T 0y} in the Y-axis direction home search spacer 462Y is adjusted spacer 461Y No. No. 6 spacer width dimension, 7 is a width dimension substantially in the middle of the width dimension of the spacer. That is, in the origin setting process, the stages 42 and 43 are not slid to the maximum, so that even if the holding unit 31 is rotated, the balance of the stages 42 and 43 is not easily lost, and the origin setting is easily performed. be able to.
(5) The stages 42 and 43 slide only in one direction from the initial state, and are biased in the other direction opposite to the one direction. Since the reference position P0 of the base material 10 is a portion located at the rearmost end in the urging direction among the positions corresponding to the optical center of the small lens 81 of the lens array 8, in the adjustment process, the stages 42 and 43, An adjustment spacer 461 is sequentially fitted between the positioning portions 45X and 45Y that come into contact with the stages 42 and 43 from the direction opposite to the biasing direction, and the stages 42 and 43 need only be driven in the direction opposite to the biasing direction. Therefore, the positioning work of the stages 42 and 43 can be facilitated.

(6) In this embodiment, the positioning portions 45X and 45Y are micrometer heads. Therefore, in the origin-finding step, the origin-seeking spacer 462 is sandwiched between the stages 42 and 43 and the positioning portions 45X and 45Y so that the outer shape center position P1 of the base material 10 and the rotation shaft 312 of the holding portion 31 coincide. In doing so, the tips of the spindles 415 of the positioning portions 45X and 45Y can be moved back and forth, so that the outer shape center position P1 of the base material 10 and the rotation shaft 312 of the holding portion 31 can be easily matched.
(7) The tips of the spindles 451 of the positioning portions 45X and 45Y are moved forward and backward to slide the stages 42 and 43, and the rotation shaft 312 of the holding portion 31 and the small lenses 81 of the lens array 8 on the surface of the base material 10 Although a method of matching the position corresponding to the optical center is also conceivable, in this case, the spindle 451 has a length dimension to a position corresponding to the optical center of the small lens 81 farthest from the reference position P0. Must.
On the other hand, in this embodiment, since the adjustment spacer 461 and the origination spacer 462 are sandwiched between the stages 42 and 43 and the positioning portions 45X and 45Y, the spindle 451 is farthest from the reference position P0. It is not necessary to have a length dimension up to a position corresponding to the optical center of the small lens 81. Therefore, the length of the spindle 451 can be shortened as compared with the case where the stage 42, 43 is slid by moving the tip of the spindle 451 forward and backward, so that the jig 4 can be reduced in weight.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the embodiment, the cross-shaped mark 112 indicating the arrangement direction of the recesses 111 is formed on the base material 10, but the present invention is not limited thereto. For example, as shown in FIG. A pair of straight marks 112 ′ may be formed.
Moreover, in the said embodiment, although the cross-shaped mark 112 was a thing dented in concave shape, it may not be restricted to this but may be convex. Further, the mark may be a flat one formed by printing or the like, for example, without forming a concave or convex three-dimensional shape.
Furthermore, in the embodiment, when adjusting the tilt of the Y stage 42 and the X stage 43, the dial gauge is brought into contact with the side surfaces of the Y stage 42 and the X stage 43, and the dial gauge is moved in the X-axis direction to change the scale. And the inclination is calculated from the distance the dial gauge is moved and the change in the scale. When the inclination is equal to or larger than a predetermined value, the inclination of the Y stage 42 and the X stage 43 is adjusted. The method for adjusting the tilt of the X stage 43 is not limited to this. For example, as shown in FIG. 17, a mark 442B indicating the moving direction of the X stage 43 and the Y stage 42 is formed on the surface of the X stage 43 to which the rotary stage 44 is attached, and the direction indicated by the mark 442B, A deviation between the vertical direction and the horizontal direction is detected, and based on the detection result, the holding unit 31 is rotationally driven so that the movement direction and the horizontal direction of the X stage 43 are substantially coincided with each other. The vertical direction may be substantially matched. By doing so, the movement directions of the X stage 43 and the Y stage 42 are set to the horizontal direction and the vertical direction based on the marks 442B formed on the X stage 43, respectively. Can be easily adjusted.

In the embodiment, the contact portions 43B and 42C formed on the X stage 43 and the Y stage 42 are blocks, and the positioning portions 45X and 45Y are micrometer heads. The part may be a micrometer head and the positioning part may be a block. Furthermore, you may comprise both a positioning part and a contact part with a block.
In the embodiment, the outer shape center position P1 of the base material 10 and the position corresponding to the optical center of the small lens 81 of the lens array 8 on the surface of the base material 10 are different. The center position may coincide with any one of the positions corresponding to the optical center of the small lens of the lens array on the surface of the base material. In such a case, the origin return spacer also serves as the adjustment spacer, and the number of spacers can be reduced.

  Further, in the above-described embodiment, in the origin finding process, an origin finding spacer 462 corresponding to the distance between the outer shape center position P1 of the base material 10 and the reference position P0 of the base material 10 is prepared. The spacer 462 is sandwiched between the positioning portions 45X and 45Y and the stages 42 and 43, and the rotation axis 312 of the holding portion 31 and the outer shape center position P1 of the base material 10 are aligned, so that the reference position P0 of the base material 10 is However, the present invention is not limited to this, and the reference position P0 of the base material 10 and the rotation shaft 312 of the holding unit 31 may be directly matched. By doing in this way, the origin origin spacer becomes unnecessary and the number of members can be reduced.

Furthermore, in the above embodiment, the stage is slidable only in one direction from the initial state, but is not limited thereto, and may be slid in the other direction. In such a case, the reference position of the base material is not the position of the end of the array but the center of the array among the positions corresponding to the optical centers of the small lenses of the lens array arranged in a matrix. Can do.
In the above-described embodiment, the lens array 8 has the small lenses 81 arranged in 6 rows × 4 columns, but is not limited thereto, and the arrangement is arbitrary. For example, it may be 6 rows × 1 column, 4 columns × 6 rows, and the like.

Further, in the embodiment, when the stages 42 and 43 of the jig 4 are moved, the stages 42 and 43 are moved using the adjustment spacer 461. However, the stage 42 and 43 are moved without using the adjustment spacer 461. 42 and 43 may be moved a predetermined distance. For example, the tips of the spindles 451 of the positioning units 45X and 45Y are moved forward and backward to slide the stages 42 and 43, and the optical axes of the rotating shaft 312 of the holding unit 31 and the small lenses 81 of the lens array 8 on the surface of the base material 10 are detected. The position corresponding to the center may be matched.
Moreover, in the said embodiment, although the shaping | molding die 1 in which the recessed part 111 was formed was manufactured, you may manufacture not only this but the shaping | molding die in which the convex part was formed. Moreover, the molded article manufactured by this invention is not restricted to the shaping | molding die 1, What is necessary is just the thing which the recessed part or the convex part arranged in the matrix form, for example, an optical component etc. may be sufficient.

  The present invention can be used for a mold used for manufacturing a lens array.

The perspective view which shows the shaping | molding die concerning embodiment of this invention. The perspective view which shows the processing machine and jig | tool for manufacturing the said shaping | molding die. The schematic diagram which shows the modification of the said processing machine. The side view which shows the jig | tool for attaching the base material of the said shaping | molding die to a processing machine. The side view which looked at the said jig | tool from the direction different from FIG. The front view of the said jig | tool. The front view of the said jig | tool. The front view of the said jig | tool. The schematic diagram which shows the relationship between a spacer and the position used as the process center of the recessed part formed in the base material surface. The flowchart which shows the manufacturing method of a shaping | molding die. The flowchart which shows the manufacturing method of a shaping | molding die. The perspective view which shows the lower mold | type using the said shaping | molding die, and the upper mold | type arrange | positioned facing this lower mold | type. It is a schematic diagram which shows the manufacturing process of a lens array, and FIG. 13 (A) has shown the state which pinches | interposes a glass material between a lower mold | type and an upper mold | type. FIG. 13B is a view showing a state in which the glass material is press-molded by the lower mold and the upper mold, and FIG. 13C is a cross-sectional view of the press-molded molded body. The perspective view which shows the said molded object. FIG. 15A is a front view of the lens array, FIG. 15B is a side view of the lens array, and FIG. 15C is from a direction different from FIG. 15B. It is the side view of the lens array which looked. The perspective view which shows the modification of a shaping | molding die. The figure which shows the modification of a jig | tool.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mold, 3 ... Processing machine, 4 ... Jig, 6 ... Glass material (raw material), 7 ... Molded object, 8 ... Lens array, 10 ... Base material, 11 ... Molding surface (surface), 31 ... Holding part, 32 ... Processing part, 42 ... Y stage, 44 ... Rotary stage, 45Y ... Positioning part, 45X ... Positioning part, 46 ... Spacer, 51 ... Lower mold, 52 ... Upper mold, 81 ... Small lens, 82 ... Mark, 111 ... Recess, 112 ... Mark, 461 ... Adjustment spacer, 461X ... Adjustment spacer, 461Y ... Adjustment spacer, 462 ... Spacer, 462X ... Spacer, 462Y ... Spacer, P0 ... Reference position, P1 ... Outline center position

Claims (4)

A method for producing a molded article in which a plurality of concave portions or convex portions are arranged in a matrix on the surface,
A mark forming step of forming a mark indicating the arrangement direction of the concave portion or the convex portion on the surface of the base material of the molded article;
Using a processing machine, and processing the recess or projection on the surface of the base material of the molded product,
The processing machine includes a holding unit that rotatably holds the base material, and a processing unit that forms a concave or convex portion by cutting or grinding on the surface of the base material held by the holding unit,
The base material is attached to the holding portion via a jig, and the jig is provided on the stage and a stage for moving the base material along the arrangement direction of the concave portion or the convex portion. A rotating stage,
At the preceding stage of the processing step, the base material is attached to a jig, and a deviation between the direction indicated by the mark formed in the mark forming step and the moving direction of the stage of the jig is detected,
Based on the detection result, a base material moving direction adjustment step is performed in which the rotating stage is driven, the base material is rotated, and the arrangement direction of the concave or convex portions of the base material and the moving direction of the jig stage are substantially matched. The manufacturing method of the molded article characterized by implementing. In the manufacturing method of the molded article according to claim 1,
A mark indicating the moving direction of the stage is formed on the stage of the jig,
In the previous stage of the base material moving direction adjustment step, the jig is attached to a holding part of a processing machine, and a deviation between a direction indicated by a mark formed on the stage and a vertical direction and / or a horizontal direction is detected. A method of manufacturing a molded product, characterized in that, based on the detection result, the moving direction of the stage substantially matches the vertical direction and / or the horizontal direction. In the manufacturing method of the molded article according to claim 1 or 2,
The jig includes a base fixed to the holding unit of the processing machine, the stage slidably provided on the base, and a positioning unit that contacts the stage and positions the stage.
Between the base material moving direction adjustment step and the processing step,
An origin finding step in which any one of the positions corresponding to the center of the concave portion or the convex portion on the surface of the base material is set as a reference position, and the reference position and the rotation axis of the holding portion coincide with each other.
An adjustment spacer is prepared according to the distance between the reference position of the base material and the position corresponding to the center of another concave or convex portion, a stage is slid, and the positioning portion is moved to the stage via the adjustment spacer. A method of manufacturing a molded article, comprising: performing an adjustment step of aligning the rotation axis of the holding portion with the center of the concave portion or convex portion of the surface of the base material by contacting with the base material. The molded product is a molding die for molding a lens array, and a molding die in which concave portions or convex portions corresponding to small lenses arranged in a matrix shape of the lens array are formed on the molding surface,
A molding die manufactured by the method for manufacturing a molded product according to any one of claims 1 to 3.

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