JPH0745298Y2 - Mold release device for composite optical element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an apparatus for releasing a composite optical element composed of a glass or plastic substrate and an energy-curable resin from a mold of a molding apparatus.

[Conventional technology]

Generally, a method for manufacturing a composite-type optical element is such that an energy-curable resin is interposed between a mold surface polished into a predetermined shape and a predetermined surface of a glass or plastic substrate, or the resin is heated or heated in that state. It is manufactured by curing by means such as UV irradiation. That is, a resin layer whose surface is molded into an optical surface corresponding to the surface of the mold is laminated on a predetermined surface of the glass or plastic substrate.

Further, after the resin layer is cured, the resin layer and the mold are separated from each other to manufacture a molded composite optical element. In the method for molding a composite optical element, as a means for releasing the resin of the optical element made of a glass or plastic substrate molded from the mold, a contact part between the mold and the composite optical element (contact molding part) ) Is alternately put into the heating tank and the cooling tank, and the mold is released by utilizing the difference in linear expansion coefficient between the mold and the resin, or
As disclosed in Japanese Patent Laid-Open No. 60-76319, there is known a means of applying ultrasonic vibration to a mold and releasing the mold by utilizing the vibration.

[Problems to be solved by the device]

As described above, in the means for releasing the composite type optical element from the mold, the means utilizing the difference in linear expansion coefficient, the means utilizing ultrasonic vibration, etc., all have a time of several seconds to several tens of seconds for the release. Requires. Therefore, there is a problem that the molding cycle time becomes long and the cost becomes high. When using the difference in linear expansion coefficient, a heating tank and a cooling tank are required.
When ultrasonic vibration is used, various devices such as an ultrasonic oscillator and a vibrator are required, which causes a problem that the cost of the molding apparatus itself becomes high and the apparatus becomes complicated and the cost of the molded product becomes high.

This invention was created in view of the above-mentioned problems, and by simply applying a weak force, the optical element can be released from the mold without damage in a short time and with a simple structure, and the release of the released optical element It is an object of the present invention to provide an apparatus for releasing a substrate without significantly deforming the base material and the resin surface.

[Means and Actions for Solving the Problems]

This invention relates to a mold release apparatus for a composite optical element comprising a glass or plastic base material and an energy curable resin having a predetermined optical shape, and a base material having a diameter larger than the outer diameter of the mold. The optical of the mold is formed on a part of the outer peripheral edge portion of the base material which is outward from the outer periphery of the mold of the contact molding in which the resin is interposed between the mold and the mold having a predetermined optical surface. A mold releasing apparatus for a composite type optical element, comprising means for applying an external force for mold releasing in a direction generally parallel to an axis and opposite to the mold.

The concept of this invention by the above technical means will be described with reference to the drawings.

FIG. 1 is a plan view showing the conceptual configuration of this invention.

As shown in the figure, below the molding surface of the mold 1 having the desired shape on the lower end surface, there is a resin 3 having a molding surface of the same desired shape on the opposite side, and below the lower end surface of the resin 3 the metal A base material 2 having a diameter larger than the outer diameter of the mold 1 and having a predetermined R formed on the upper surface is integrally laminated and molded to form a contact molding 4.

A part of the outer peripheral edge portion 5 of the base material 2 protruding outward from the outer periphery of the mold 1 is parallel to the optical axis 6 as shown in the figure, and
It is configured to apply an external force 7 (arrow) in a downward direction from the side.

In the above state, an external force 7 is applied from a direction indicated by an arrow to a part of the outer peripheral edge portion 5 of the base material 2 of the contact molding 4 of the mold 1 and the composite optical element 9, whereby the mold 1 and the composite mold Optical element 9
The concentration force is applied to a position of the contact molding portion 8 closest to the external force 7 and the composite optical element 9 is separated from the mold 1 easily with a weak force in a short time and by a partial deformation of the external force 7 acting. Can be molded.

[Embodiment] This invention will be described based on an embodiment. In each of the embodiments and the conceptual diagram, the same members and the same configurations in the drawings will be described using the same reference numerals, and the description thereof will be limited to the first embodiment and omitted in the other embodiments.

(First Embodiment) FIG. 2 shows a first embodiment of a mold releasing apparatus for a composite optical element according to the present invention.
It is a top view which shows the principal part side surface of an Example.

As shown in FIG.
R of this resin 3
On the forming surface, the base material 2 formed to have a diameter larger than that of the mold 1 is closely molded.

Above the mold 1, a mold supporting base 10 configured such that the mold 1 and the contact molding 4 made of the resin 3 and the base material 2 is detachably mounted is mounted on an apparatus (not shown). .

At the upper end of the die support base 10, a cylinder support portion 12 is attached, which is provided with the base ends of cylinders 13 arranged in parallel in the axial direction along the periphery of the die support base 10. A piston rod 14 is slidably attached to the tip of the cylinder 13 so as to be able to slide up and down in the cylinder.

A base material pushing member 15 made of a material softer than the base material 2, for example, a polyacetal material is attached to the tip of the piston rod 14.

Next, the operation of this embodiment having the above configuration will be described.

First, in the state shown in FIG. 2, the R forming surface of the mold 1 is
It has a forming surface that has been polished into a prescribed shape, and a silicon-based release agent KS-701 (trade name) diluted to 10% by weight with toluene is applied to the entire surface of the forming surface. Bake and place. The base material 2 is made of optical glass (BK-7) whose both surfaces are polished into a predetermined shape, and an ultraviolet curable urethane is provided between the predetermined surface of the base material 2 and the mold 1 subjected to the above treatment. The UV-curable urethane acrylate-based resin 3 is irradiated with ultraviolet rays for 5 minutes with the acrylate-based resin 3 interposed therebetween to cure the UV-curable urethane acrylate-based resin 3, thereby forming a mold 1, a resin layer 3 and a substrate 2. The close contact forming body 4 is configured.

The close-contact forming body 4 formed by the above-described configuration is loaded / unloaded from the molding apparatus and mounted on the lower end of the die support 10. In this case, the piston rod 14 of the cylinder 13 is raised upwards,
The base material pushing member 15 is a base material 2 that is outward from the outer periphery of the mold 1.
Is not in contact with the outer peripheral edge portion 5.

Next, operate the cylinder 13 and move the piston rod 14 to 1 mm / min.
When the base material pushing portion 15 comes into contact with the outer peripheral edge portion 5 of the base material 2 at one place and an external force 7 of several kg is applied to the one outer peripheral edge portion 5 of the base material, the base material pushing portion 15 is instantly lowered at a speed of 10 mm / min. The composite optical element 9 is released from the mold 1. In addition, on the functional surface made of the resin 3 of the composite optical element 9 after the mold release, the surface of the mold 1 polished into a predetermined shape is faithfully reproduced.

According to the present embodiment, the structure is simple, the mold release time is shortened, and excellent effects can be obtained in terms of productivity and cost.

(Second Embodiment) FIG. 3 shows a second embodiment of a mold releasing apparatus for a composite optical element according to the present invention.
It is a top view which showed the principal part side surface of an Example, and showed the one part by the cross section.

As shown in FIG. 3, since the adhesion forming body 4 formed by the mold 1 and the composite optical element 9 is placed, the protruding outer peripheral edge of the composite optical element 9 can be inserted into the hook-shaped claw on the inner peripheral wall surface. A column 24 is planted on the circumferential end of an annular base pedestal 20 having 21 formed therein, and a cylinder 22 having a piston rod 23 provided at the center lower end face is attached to the upper end of the column 24. . The base end of the mold 1 is detachably attached to the lower end of the piston rod 23. The cylinder 22 is a piston rod.
It is configured to control the ascent rate of 23.

The operation of this embodiment having the above configuration will be described.

In the state shown in FIG. 3, the coating process of the mold release agent on the mold 1 and the contact molding method are the same as those in the first embodiment, and therefore the description thereof is omitted.

As shown in the figure, the contact molding 4 is mounted on the substrate holder 20,
Further, the mold 1 and the piston rod 23 are connected to each other. In this case, the piston rod 23 previously provided on the cylinder 22 has descended to the bottom dead center position. Next, when the cylinder 22 is operated and the piston rod 23 is raised at a speed of 1 mm / min to 10 mm / min as shown by the arrow, the upper end of the inner wall of the hook-shaped pawl 21 is moved to the base material 2
When a few kg of external force 7 is applied to the outer peripheral edge 5 of the base material and the outer peripheral edge 5 of the substrate is applied, the composite optical element 9 is released from the mold 1 instantly.

It should be noted that the functional surface of the composite optical element 9 after release from the resin 3 faithfully reproduces the surface of the mold 1 polished into a predetermined shape.

The effects of this embodiment are similar to those of the first embodiment.

(Third Embodiment) FIG. 4 shows a third embodiment of the mold releasing apparatus for a composite optical element according to the present invention.
It is a top view which showed the principal part side surface of an Example, and showed the one part by the cross section.

As shown in FIG. 4, in order to mount the base end of the mold 1 of the contact molding 4 made of the mold 1 and the composite optical element 9, the lower end surface of the mold support 34 is detachably attached. It is mounted on a device (not shown).

A motor 33 connected to a base material pressing portion 30 for pressing down the base material 2 to release the base material 33 is provided at a lateral position of the support base 34 of the mold.
Are installed.

A pinion gear 32 is fixedly mounted on the rotary shaft of the motor 33, and the pinion gear 32 is engaged with the pinion gear 32.
A rack gear 31 which operates up and down is arranged in parallel with the optical axis of the composite optical element 9 mounted on the mold support 34 in its longitudinal direction. Further, a base material pushing portion 30 made of a polyacetal material is provided on the lower end (tip end) surface of the rack gear 31 in order to prevent the base material 2 from being damaged.

Next, the operation of this embodiment having the above configuration will be described.

In the state shown in FIG. 4, the coating treatment of the mold release agent on the mold 1 and the contact molding method are the same as those in the first and second embodiments, and will be omitted.

As shown in the figure, the contact molding 4 is attached to the mold support 34,
In this case, the rack gear 31 has already moved upward and the base material pushing portion 30 is not in contact with the base material 2. Then the motor 33
, The pinion gear 32 is rotated at a predetermined speed, and the rack gear 31 is lowered at a speed of 1 mm / min to 10 mm / min, and the base material pushing portion 30 comes into contact with the base material 2 as shown by an arrow. number
When an external force 7 of kg is applied to the outer peripheral edge portion 5 of the base material, the composite optical element 2 is released from the mold 1 instantly.

The effects of this embodiment are the same as those of the first and second embodiments.
The same effect as the embodiment is obtained.

(Fourth Embodiment) FIG. 5 shows a fourth embodiment of the mold releasing apparatus for a composite optical element according to the present invention.
It is a top view which showed the principal part side surface of an Example, and showed the one part by the cross section.

As shown in FIG. 5, the difference between the third embodiment and FIG. 4 is that the motor 33 has a pinion gear 32 and a rack gear 31.
In the present embodiment, a rotary plate 41 is attached to the rotary shaft of the motor 42, in contrast to the device configured to release by releasing the outer peripheral edge portion 5 of the base material 2 with the base material pressing portion 30 by biting. The only difference is that a convex base material pushing portion 40 is provided on the outer periphery of the rotary plate 41, and the outer peripheral edge portion 5 of the base material 2 is pushed down by the rotation of the motor to release the die. That is, the mold 1 shown in FIG.
The method for molding the contact molding 4 of the composite optical element 9 and is the same as in the first, second and third embodiments. The contact molding 4 is mounted on the die support 43. A motor 42 whose rotation speed is variable is mounted on the mold support 43, and a rotary plate 41 is mounted on the rotation shaft of the motor 42. A substrate pushing portion 40 that pushes the outer peripheral edge portion 5 of the base material 2 is configured to project at one end of the outer circumference of the rotating plate 41.

The operation of this embodiment having the above configuration will be described.

In the state shown in FIG. 5, the coating treatment of the mold release agent on the mold 1 and the contact molding method are the same as those in the above-mentioned respective embodiments, and therefore the description thereof is omitted.

As shown in the figure, the contact molding 4 is mounted on the mold support base 43,
In this case, the base material pushing portion 40 of the rotary plate 41 is placed in advance in the raised position and is not in contact with the outer peripheral edge portion 5 of the base material 2. Next, when the motor 42 is operated to rotate the rotary plate 41 at a predetermined number of revolutions, the base material pressing portion 40 contacts the base material 2 and an external force 7 of several kg is applied to the base material outer peripheral edge portion 5, the composite type is instantly formed. The optical element 9 is released from the mold 1.

The effects of this embodiment are similar to those of the above embodiments.

(Fifth Embodiment) FIG. 6 shows a fifth embodiment of the mold releasing apparatus for a composite optical element according to the present invention.
It is a top view which showed the principal part side surface of an Example, and showed the one part by the cross section.

As shown in FIG. 6, a contact molding 4 of the mold 1 and the composite optical element 9 is detachably mounted on the lower end surface of a mold support 51 (not shown) mounted on the apparatus. .

A motor 52 whose rotation speed is variable is mounted on the upper side of the mold support 51. A ball screw 53 extends downward from a rotation shaft of the motor 52 through a hole formed in the die support 51.

A nut 54 having a rectangular block shape is screwed onto the hole screw 53, and is configured to move in the vertical direction by rotation of the ball screw 53. Also the ball screw of the nut 54
Screwing with 53, on the opposite side, a hole is bored, one end of which is fixedly mounted on the mold support 51 and the other end of which is fixedly mounted on the bearing member of the ball screw 53, and a support column 56 is inserted and fitted therein. It constitutes a rotation prevention means.

In addition, on the lower end surface of the nut 54 on the screwing side of the ball screw 53,
A base material pressing member 50 formed of a polyacetal material is provided. Since the ball screw 53 is arranged in parallel with the optical axis of the mold 1, the nut 54 is also configured to move up and down in parallel with the optical axis of the mold 1.

In the state shown in FIG. 6, the mold release agent coating treatment and the contact molding method on the mold 1 are the same as those in each of the above-described embodiments, and thus will be omitted.

The close contact forming body 4 is mounted on the mold support 51, and in this case, the nut
Reference numeral 54 has already moved upward, and the base material pressing portion 50 is not in contact with the base material 2.

In this state, the motor 52 is operated and the nut 54 moves from 1 mm / min.
Rotate the ball screw 53 so that it descends at a speed of 10 mm / min. When the base material pressing portion 50 contacts the base material 2 and an external force 7 of several kg is applied to the base material outer peripheral edge portion 5 in the direction shown by the arrow, the composite optical element 2 is released from the mold 1 instantly.

In each of the above-mentioned embodiments, all of the embodiments are shown as embodiments of the present invention as a simple jig intended only for mold release. However, it is incorporated in the present invention in a production-level apparatus for molding the composite optical element 9. Of course, it is okay.

[Effect of device]

According to the present invention having the above-described configuration, the mold release associated with the molding of the composite optical element can be easily performed by simply applying a weak force with a simple configuration.
It can be released without damage in a short time, and can be released without significantly deforming the base material and resin layer of the released composite optical element, so that a composite optical element with high surface accuracy can be obtained,
The effect on productivity and cost is significant.

[Brief description of drawings]

FIG. 1 is a plan view showing the conceptual configuration of this invention. FIG. 2 is a plan view showing a side surface of a main portion of a first embodiment of a mold releasing apparatus for a composite optical element according to the present invention and a part of which is shown in section. FIG. 3 is a second part of the mold releasing device for the composite optical element according to the present invention.
The top view which showed the principal part side surface of an Example, and showed the one part by the cross section. FIG. 4 shows a third embodiment of the releasing device for the composite optical element of the present invention.
The top view which showed the principal part side surface of an Example, and showed the one part by the cross section. FIG. 5 is a fourth view of the releasing device for the composite optical element of the present invention.
The top view which showed the principal part side surface of an Example, and showed the one part by the cross section. FIG. 6 shows a fifth embodiment of the mold releasing apparatus for the composite optical element according to the present invention.
The top view which showed the principal part side surface of an Example, and showed the one part by the cross section. DESCRIPTION OF SYMBOLS 1 ... Mold 2 ... Substrate 3 ... Resin 4 ... Adhesive molded body 5 ... Substrate outer peripheral edge portion 6 ... Optical axis 7 ... External force 8 ... Adhesion portion between die and resin 9 ... Composite optical element 10,34, 43,51… Mold support 13,23… Cylinder 14,23… Piston rod 15,30,40,50… Substrate pushing member 21… Hook part

Claims (1)

[Scope of utility model registration request] 1. A mold release apparatus for a composite type optical element comprising a glass or plastic base material and an energy curable resin having a predetermined optical shape, the base material having a diameter larger than the outer diameter of a mold. Between the mold and the mold having a predetermined optical forming surface, the mold is formed on a part of the outer peripheral edge portion of the base material that is outward from the outer periphery of the mold of the contact molding in which the resin is interposed. And a means for applying an external force for releasing in a direction substantially parallel to the optical axis of the above and in a direction opposite to the mold, a releasing apparatus for a composite optical element.