JPS61247629A - Device for compression-molding optical element - Google Patents

Abstract

PURPOSE:To supply a material and to take out a molding without bringing a conveyor member into direct contact with the molded surface of the material by moving back and forth a means for supplying the material provided with a couple of retaining parts and a means for taking out the molded element in the direction vertical to the movable shaft of a metallic mold. CONSTITUTION:The outer peripheral part 15b of an optical material 15 whose surface 15a is mirror-finished is held by retaining claws 18 of a supply and conveyor means 17 and the material is moved by the rotation of a holding arm 19 into a heater part 14 and softened. Then the softened material is further conveyed into a compression- molding part 10 and held by metallic molds 12 and 13. The clamping of the retaining claws 18 is released, the conveyor means 17 is returned to the original position and the material 15 is compression-molded with the metallic molds 12 and 13 to form a concave lens 11. A carrier means 20 is moved forward, the engaging part 24 of the main body 25 is engaged with the metallic molds 12 and 13 and a bulging flange part 11b of the formed lens 11 is engaged with the engaging groove 21 of a holding piece 23. The metallic molds 12 and 13 are separated from each other, the carrier means 20 is moved backward from the molding part 10 into a heater 16 to anneal the lens and then moved backward to the takeout part to take out the lens 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for supplying optical materials in an optical element molding apparatus for press-molding optical materials and a device for discharging optical elements after press-molding.

[Prior Art] As a method for transporting optical materials when press-molding glass products, such as glass lenses, the invention disclosed in Japanese Patent Application Laid-Open No. 51-65117 is known.

As shown in FIG. 8, the optical material conveying method of this invention is such that the optical material 3 is placed on a heating plate 5 shown in an inverted state in the drawing.
is housed in the concave portion of the heating plate l under the 1-direction state,
Then, the heating plate 1 is conveyed to a predetermined position via the holding part 2 that holds the heating plate 1 .

Further, a cover plate 4 is attached to the heating plate l by screws 5 so as to be openable and closable, and covers the four parts that house the optical material 3.
The conveyance port for the optical material 3 [During the process, the trunk mold 7 has a core 6 that is covered by the cover plate 4 to prevent the adhesion of dust and the like and allows the optical material 3 to be placed in a predetermined position, that is, as shown in the drawing. At the time when the holding part 2 is transported to the supply position for the press molding die consisting of the
The heating plate 1 is inverted through the recess, and the optical material 3 is placed on the cover plate 4'' from inside the recess.

Thereafter, as shown in FIG. 8, by tilting the opening of the cover plate 4, the optical material 3 is slid down and fed into the side mold 7 of the press molding die via the tilted cover plate 4. .

[Problems to be Solved by the Invention] However, in the conventional method of transporting optical elements, the heating plate 1
Although the adhesion of dust and the like to the optical material 3 stored and conveyed in the recessed part of the "a" can be prevented by the "a" root 4, as shown in the figure, the optical material 3 is fed into the side mold 7 while being slid down on the cover plate 4. Because of this, it is undeniable that the surface of the optical material 3 is scratched and roughened during this supply process.

Therefore, scratches remain on the surface of the optical element obtained by press-molding the optical material 3 with surface scratches in the side mold 7, and processing such as fine grinding and mirror polishing is required after press-molding. It was to be done.

Therefore, the present invention was made by focusing on this conventional problem, and it is possible to supply optical materials to the molding section of a press molding device without causing scratches or other scratches on the surface of the optical materials. To provide an optical material conveying device and an optical element conveying device that can carry out and convey an optical element after press molding without causing scratches on the effective surface of the optical element during the conveyance 111 from the molding section. This is the purpose.

[Means and operations for solving the problem] This device includes a supply conveyance means and a discharge conveyance means, which are provided with a pair of clamping parts that clamp the outer peripheral part of the optical material or the flange part of the optical element after press molding, or the above-mentioned A carry-out conveyance means is provided with a holding groove that engages and holds the optical material supply conveyance means and the flange portion of the optical element, or a holding groove that engages and holds the outer peripheral portion of the optical material is provided in place of the optical material supply conveyance means. The optical material is transported by a supply conveyance means, and a supply and discharge conveyance means having both a holding groove that engages and holds the outer peripheral portion of the optical material and a holding groove that engages and holds the flange portion of the optical element after press molding. The supply and removal are performed without contacting the surface to be molded and the molding surface of the optical element after press molding.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

(First Embodiment) FIG. 1 is a longitudinal cross-sectional side view showing a first embodiment of the apparatus of the present invention, and FIG. 2 is a perspective view of an optical material supplying and discharging means in the same apparatus.
FIG. 3 is a perspective view of a conveyance means for carrying out a concave lens as an optical element f after press molding in the same apparatus.

In the figure, 10 is a press-molded part of a concave lens 11 as an optical element, and "-1 both molds 12 and 13 are placed in relative directions."
1, they are arranged facing each other so as to be movable downward, and are connected and held to drive mechanisms (not shown) that move up and down, respectively.

Reference numeral 14 denotes a part of the heater on the supply side that heats and softens the optical material 15 (see FIG. 2);
5 (on the right side in FIG. 1).

16 is the concave lens 11 after molding in the press molding part lO
A part of the heater on the discharge side of the press molding section 10 is disposed on the discharge side (left side in FIG. 1) of the concave lens 11 of the press molding section 10.

Reference numeral 17 denotes a supply conveyance means for supplying the optical material 15 to the press molding section 1O, and this supply conveyance means 17 has a pair of clamping claws 18 that clamp the outer circumferential portion of the optical material 15, as shown in FIG. As shown in FIG. 1, the holding arm 19 is connected to a holding arm 19 provided at It is constructed by connecting and holding a drive mechanism that does not require a drive mechanism.

Reference numeral 20 denotes a carry-out conveying means for carrying out the concave lens 11 after being press-molded in the press-forming unit 10, and this carry-out carrying unit 20 carries out the concave lens 1 as shown in FIG.
A pair of holding pieces 23 each having an engagement groove 21 that engages one flange portion 11b is attached to one mold 1 of the press molding part IO.
2. The main body 25 has an engaging portion 24 having a larger diameter than the outer diameter of 13.
The main body 25 is placed opposite to the tip of the press molding section 10 as shown in FIG.
It is configured by being connected and held to a drive mechanism (not shown) that moves the drive mechanism forward and backward in a direction perpendicular to the movable axis of the drive mechanism.

Therefore, in the press molding apparatus for the concave lens 11 having such a configuration, the surface 15a is preliminarily supplied from a supply unit (not shown).
A pair of clamping claws 1 hold the optical material 15 which has been polished into a mirror surface.
8, and prior to this supply, due to the rotation of the holding arm 19 in the opening direction, both the clamping claws 18, which had been spread out from each other in the opening direction, are rotated in the closing direction of the holding arm 19. is closed, and the outer peripheral portion 15b of the optical material 15 is held and held.

After that, a pair of clamping claws 1 clamping this optical material 15
8 is driven by a drive mechanism connected to the holding arm 19 to enter the supply side heater part 14, and at the same time 14, when the optical material 15 is softened to the required viscosity, it is moved into the press molding part 10. The optical material 15 is carried into the molding position and stopped.

When the optical material 15 is carried into the molding position of the press molding section 10, the -1-1,000-ryo molds 12 and 13 are moved in opposite directions by the drive mechanism, and the clamping claws 18
The optical material 15 held by -1-senryo mold 1
2 and 13 are held by their molded surfaces, the holding arm 19 of the clamping claw 18 rotates in the opening direction, and both clamping claws 1
In order to release the clamping state of the optical material 15 by 8 and return to the next supply position of the optical material 15 (the supply position of the optical material 15 to the clamping claws 18), the press molding section 10 passes through the heater part 14. It retreats and returns from the inside via the heater part 14.

In addition, in connection with the backward movement of the supply conveyance means 17, L
Optical material 1 supplied between the molding surfaces of Senryo mold 12.13
5 is press-molded by the cooperative action of the -1-1,000-metal molds to form the desired concave lens 11.

Furthermore, -L lower molds 12.1 of this press molding part lO
In connection with the molding operation No. 3, the unloading conveyance means 20 moves forward and enters the press molding section IO through the heater part 16.

The engaging portion 24 at the tip of the main body 25 is engaged with both the upper and lower molds 12 and 13, and the flange portion 11b that is bulged and molded on the outer periphery of the molding surfaces of both the molds 12 and 13 is held. It is engaged with the engagement groove 21 of the piece 23.

In this connection, both the upper and lower molds 12.1 of the press molding section 20
3 are driven in a direction away from each other, and the concave lens 11 after press molding is released from the mold and simultaneously held between both holding pieces 23 (FIG. 3).

Thereafter, by reversing the carrying out and conveying means 20, the concave lens 11 held between both holding pieces 23 is carried out from inside the press molding part IO into the heater part 16, and at the same time, it is gradually cooled down in the heater part 16. , the carrying out conveying means 20 retreats to the carrying out part of the concave lens 11, and both holding pieces 23 are removed via a carrying out means (not shown).
By taking out the concave lens 11 held in the mold, preparation is made for carrying out the concave lens 11 after the next sequential press molding.

Hereinafter, by repeating the operations of the respective parts 10, 17, and 20 similar to those described above, it is possible to continuously perform the molding of the concave lens 11, and to supply the optical material 15 necessary for molding the lens 11 and the concave lens 11 after press molding. can carry out the removal of

Therefore, according to this press molding apparatus, the optical material 15
When supplying, the outer peripheral part 15b of the mirror-finished molding surface 15a is held between the pair of clamping claws 18, and the material is supplied between the molds 12' and 13 for press forming. When carrying out the concave lens 11 press-molded by the 1-downhill mold 12.13 of part 10, the flange part 11b is engaged with the engagement groove 21, and the lens is carried out while being held by the holding piece 23. Because of this, the supply and removal work can be carried out without causing scratches on the molding surface 15a of the optical material 15 and the molding surface 11a of the concave lens 11, and it is possible to mold the concave lens 11 without scratches on the press molding surface. It is something that can be learned.

(Second Embodiment) FIG. 4 is a sectional view showing a second embodiment of the device of the present invention.

Therefore, in the apparatus of this embodiment, instead of the apparatus of the first embodiment which press-molded the concave lens 11,
An embodiment of an apparatus for press-molding a convex lens 26 is shown.

Therefore, both the upper and lower molds 12.1 in the press forming part lO
3 is the necessary molding part 12 a after press molding the convex lens 26
, 1.3b, and the other configurations are the same as those of the first embodiment, so in the figures, the same components are given the same numbers, their explanations are omitted, and other parts not shown are shown. The configuration is also the same as that of the first embodiment, so its explanation will be omitted.

Furthermore, since the functions and effects are also the same, their explanations will be omitted.

(Third Embodiment) Figures 51Δ to 7 show the third embodiment of the present invention.
FIG. 5 is a perspective view of a supply and carry-out conveyance means that can both supply the optical material and carry out the press-molded convex lens 26, and FIG. 6 is a sectional view showing the holding state of the optical material in the same means. , and FIG. 7 is a cross-sectional view showing the state in which the convex lens is held after press molding in the same means.

Therefore, the apparatus of this embodiment is particularly suitable for the first. In each device of the second embodiment, the supply and conveyance means for the optical material is combined with the means for carrying out and conveying the optical element after press molding;
This is an example in which the apparatus is configured by an unloading conveyance means 45.

In the figure, reference numeral 30 denotes a pair of holding pieces, and as shown in FIG. 6, this holding piece 30 has an engagement groove 31 with a width corresponding to the thickness of the optical material 15, and as shown in FIG. An engagement groove 32 having a width corresponding to the thickness of the flange portion 26b of the convex lens 26 is formed via the step portion 33, and is connected rotatably around a pin 34 as a fulcrum.
The transport arm 35 is connected and held via a link 37 which is pivotally supported at the tip of the transport arm 5 via a pin 36.

Further, both holding pieces 30 are connected to an operating rod 3 which is disposed on the transport arm 35 so as to be able to reciprocate back and forth through a connecting member 38.
The operating rod 39 is connected to a drive mechanism that reciprocates the operating rod 39 in the front and rear directions, and the transfer arm 35 is connected and held to a drive mechanism that moves the operating rod 39 forward and backward with respect to a press molding section (not shown). It consists of:

In FIG. 1, 40 is a connecting piece extending to the main body 41 of the holding piece 30, and 42 is a pin that pivotally supports the connecting piece 40 and the link 37.

In a device having such a configuration, the optical material 15 whose surface 15a is mirror-finished is supplied from a supply portion (not shown) by the operating rod 39 that moves forward and engages with the holding piece 30 disposed oppositely in the holding state. In connection with being supplied while engaging the outer peripheral portion 15b in the groove 31, the transport arm 35 is operated to transport the optical material 15 held between both holding pieces 30 into a part of the heater (not shown), After the optical material 15 has been softened to the required viscosity in the rotating part, the transport arm 35 is operated again, and the optical material 15 is moved between the positive image molds (for example, both the upper and lower molds 12 shown in FIG. 13 rooms).

Thereafter, the operating rod 39 moves backward as the optical material 1''5 is held by the molding surface formed by the 1-positive mold of the press molding section, and both the holding pieces 3 are connected via the connecting member 38.
0 is rotated to open and expand around the pin 34 to release the holding state of the optical material 15, and at the same time, the transport arm 35 is moved to retreat both holding pieces 30 from inside the press molding section.

In connection with this, the convex lens 26 is press-molded on the molding surface of the 1-shimo mold in the press-molding section.

After that, the operating rod 39 moves forward again to return both holding pieces 30 to the state shown in FIG. The flange portion 26b formed on the outer periphery of the convex lens 26 is engaged with the engagement groove 32 as shown in FIG. 7, and the convex lens 26 is held between both holding pieces 30. After the upper and lower molds are separated and released, the transport arm 35 moves, and the convex lens 26 held between the two holding pieces 30 is carried into a part of the heater, and after being cooled, it is heated to a predetermined position. Transport it to the unloading section.

The operation of carrying out the convex lens 26 from between both holding pieces 30 in the carry-out section is performed by operating the operating rod 39.

Thereafter, the convex lens 26 can be press-molded while continuously supplying the optical material 15 and carrying out the press-molded convex lens 26 by similar operations.

Note that by applying the press molding part 10 of the first embodiment in place of the press molding part 10 of the second embodiment, the concave lens 1
The press molding for No. 1 can be carried out in the same manner.

According to the embodiment, 1. In addition to achieving the same effects as in the second embodiment, the first embodiment has separate supply and conveyance means for the optical material 15 and conveyance means for carrying out the optical elements 11 and 26.
．． This embodiment has the advantage that the device can be simplified compared to the second embodiment.

In the first to third embodiments, the optical element transport 71J transport means 20 of the first embodiment is replaced with the optical material supply transport means 17.
It is also possible to configure the means with a pair of clamping claws that clamp the flange portion of the optical element according to the configuration of the optical element transporting means 20, or conversely, it is also possible to configure both means with a configuration conforming to the optical element transporting means 20. Both the holding pieces 23 of the example are formed separately and independently in the same way as the holding piece 30 of the third example, and this is implemented by a configuration similar to the configuration of the third example through the link part and its operation part. It is also possible.

Furthermore, in each of the embodiments, only embodiments applied to a press molding apparatus for lenses with concave and convex surfaces have been described, but the present invention can also be applied to press molding apparatuses for other lenses.

[Effects of the Invention] According to the apparatus of the present invention, it is possible to supply the optical material required for press molding of an optical element and to transport the optical element after press molding without directly contacting the molding surface with the transport member. can.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing a first embodiment of the apparatus of the present invention, FIG. 2 is a perspective view of the optical material supply conveyance means, FIG. 3 is a perspective view of the optical element delivery conveyance means, and FIG. 5 is a perspective view showing the third embodiment of the device of the present invention, FIG. 6 is a sectional view showing the state in which the optical material is held, and FIG. 7 is the optical element. 8th cross-sectional view showing the holding state of
The figure is an explanatory diagram showing a conventional method for transporting optical materials. 10...Press molding part 11...Concave lens ttb...Flange part 12.13...2 positive image whole mold 14.16...Heater part 15...Optical material 17...Optics Material supply conveyance stage 18...clipping claw 19...holding arm 20...optical element carry-out conveyance means 21...engaging groove 23...holding piece 26...convex lens 26b... Flange portion 30... Holding piece 31, 32... Engagement groove 45... Supply and unloading conveyance means

Claims (4)

[Claims] (1) In an optical element press molding apparatus for press molding an optical material, an optical material supplying and conveying means comprising a pair of clamping parts that clamp the outer peripheral part of the optical material and a flange part of the optical element after press molding are provided. A press-molding apparatus for an optical element, comprising a pair of clamping parts for carrying out and transporting an optical element. (2) In an optical element press-molding apparatus that press-moldes an optical material, an optical material supply and conveyance means comprising a pair of clamping parts that clamp the outer peripheral part of the optical material and a flange part of the optical element after press-molding are provided. 1. A press-molding apparatus for an optical element, comprising an optical element carrying-out and conveying means having a holding groove that engages and holds the optical element. (3) In an optical element press molding device that press molds an optical material, an optical material supplying and conveying means is provided with a holding groove that engages and holds the outer circumferential portion of the optical material, and an optical element press molding device that press-forms the optical material after press molding. 1. A press-molding apparatus for an optical element, comprising an optical element carrying-out and conveying means having a holding groove that engages and holds a flange part. (4) In an optical element press molding device that press molds an optical material, a holding groove that engages and holds the outer circumferential portion of the optical material and a holding groove that engages the flange portion of the optical element after press molding are provided. A press-molding apparatus for an optical element, which is provided with an optical material and an optical element supply means, and an unloading conveyance means.