JPH02137739A - Production device of glass lens - Google Patents

Abstract

PURPOSE:To automatically and accurately locate glass on a bottom mold by equipping a glass heating furnace, glass lens adsorbing and transferring device, etc., adsorbing hot glass and transporting the glass to a molding part of molding machine. CONSTITUTION:This glass lens production device 40 consists of a glass heating furnace 44 to heat glass placed in a heating tray 49 and a glass lens molding machine 42 set close to the heating furnace. The molding machine 42 comprises a glass molding part 48 and an adsorbing and transferring device 46. Hot glass placed in the heating tray 49 is transferred to the molding part 48 by the transferring device 46.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a glass lens manufacturing apparatus, and more specifically, a glass lens (glass piece) heated while placed in a heating dish in a heating furnace. The present invention relates to a glass lens manufacturing apparatus configured to automatically transport a glass lens to a molding section of a molding machine without using human hands.

(Prior Art) A molding machine of a conventional glass lens manufacturing apparatus is shown in FIG. 8 (a perspective view showing the glass lens manufacturing apparatus excluding the chute section) and FIG. It has a structure as shown in the cross-sectional view).

Specifically, the molding machine 10 of the glass lens manufacturing apparatus has a frame 12, and the frame 12 has an upper plate 14, an intermediate plate 16, and a lower plate 18. There is a molding part 20 below the intermediate plate 16, and this molding part 2
0 is a lower mold 24 attached to a plate 23 of a drum 22 rotatably mounted around a shaft 29, and an upper mold 26 attached to the tip of a plunger 28 of a press cylinder 30 attached to an upper plate 14. , consisting of.

One plunger 28 of the press cylinder 30 is vertically guided by the intermediate plate 16, and when the press cylinder operates, the plunger 28 moves up and down, and the upper mold 26 attached to its tip is placed on the lower mold. It is configured to press and shape glass that has been melted. The drum 22 is
In particular, as shown in FIG. 9, adjacent surfaces each have plates 23, and a lower mold 24 is attached to each plate 23. These lower molds 24 consist of a middle mold 24a for receiving glass, and a ring-shaped lower mold body 24b arranged around the middle mold 24a. The middle mold 24a is configured to be vibrated by a vibrating device (not shown) so as to center the glass when the heated glass is placed in the lower mold 24. The drum 22 moves each lower mold 24 to a molding position below the upper mold 26, and the upper mold 26
It is arranged to be rotated by 90° about the shaft 29 to bring the glass ejecting position alternately away from the glass ejecting position. At the release position, the molded glass lens in the lower mold 24 is ejected by pushing the middle mold 24a of the lower mold 24 by a cylinder (not shown).

Particularly, as shown in FIG. 9, in the prior art, a chute section 30 for placing the heated glass placed in a heating dish in a heating furnace (not shown) into the lower mold 24 is installed in the molding machine. It is provided so as to be movable in the horizontal direction. Shoot part 30
has a base 32 slidably attached to the lower plate 18 of the molding machine 10, and a chute 36 having a discharge opening 36a at its lower end is attached to the base 32 via a mounting member 34. As the base 32 moves, the chute 36 moves between its forming position and its retracted position, as shown by the arrow.

In the prior art apparatus configured as described above, the glass lens is manufactured as follows.

A heating plate containing heated glass in a heating furnace is gripped by a gripper by an operator, and the discharge opening 36a is held by an operator.
is brought to the top of chute 36 where it is brought to the forming position, and the glass is transferred to chute 3 by inverting the heating pan.
6, slides down the slope of the chute 36, and enters the lower mold 24 through the discharge opening 36a at its lower end. The chute portion 30 is returned to the retracted position so as not to interfere with molding. Prior to molding, lower mold 2
Vibration is applied to the middle mold 24a of 4, and the glass is positioned at the center.Next, the upper mold 26 is moved downward by the operation of the press cylinder 30, and the glass is aligned with the lower mold 24. Press between them to form a glass lens. After molding, the upper mold is returned upward. Once the glass lens has been molded, the drum 22 is rotated 90'' to bring the lower mold 24 containing the molded glass lens into the ejection position, and the cylinder (not shown) is moved into the lower mold. Mold 2 of mold 24
Push 4a from behind to release the glass lens. At this time, other lower molds have been brought to the molding position, so
The chute is moved to the molding position again and molding is continued in the same manner.

(Problem to be solved by the invention) Such conventional technology has the following drawbacks.

First, a worker must transport the heating tray containing the heated glass from the heating furnace to the chute.
This requires labor and prevents automation of glass lens manufacturing equipment.

Second, vibration is applied to the middle mold in order to center the glass placed in the lower mold, but with this vibration alone, the glass is not reliably centered and is pressed. In such cases, the glass will not be pressed evenly and the left and right sides will be unbalanced. In particular, when making thin lenses, a particularly large amount of glass component is pressed on the side where there are many off-center parts, so so-called "wrinkles", "half-walls"° and "ridges" occur. , and even Paris may occur. In particular, glass lenses with "wrinkles" and "parts of flesh" impair their optical properties and must be discarded as defective products.

Further, although the illustrated prior art is configured to make two glass lenses at the same time, there is also a device in which a large number of glass lenses are made at the same time. In this type of glass lens manufacturing equipment that simultaneously manufactures many glass lenses, workers must visually check whether the glass is centered due to vibrations, but it is difficult to check many glasses at the same time. It is difficult to do so, and it is impossible to center all the glass by applying vibration for a long time because the heated glass will cool down.

Thirdly, as mentioned above, vibration is applied to the inner mold to position the glass, but a vibration device is required for this purpose, which complicates the structure of the glass lens manufacturing equipment and increases the manufacturing cost of the equipment. I'm making it a thing.

Therefore, it is an object of the present invention to automatically transport and accurately center the glass from the heating furnace to the lower mold of the molding machine mechanically, without the need for manual work and without the provision of vibration devices. The purpose of the present invention is to provide a glass lens manufacturing apparatus that can produce glass lenses.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a heating furnace for heating glass to be made into lenses placed in a heating dish, and a glass lens forming machine disposed close to the heating furnace. In the glass lens manufacturing apparatus, the glass lens forming machine includes a glass forming section consisting of a lower mold and an upper mold that is placed above the lower mold and is movable up and down, and a heating plate in a heating furnace for heating the glass. and a suction moving device configured to move the molding section of the molding machine from a position in the furnace where the glass lens is placed to a molding position.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic front view of a glass lens manufacturing apparatus.

FIG. 2 is a schematic cross-sectional view taken along line 2--2 of FIG. 1 to show the molding section of the glass lens manufacturing apparatus. Figure 3 shows
2 is an enlarged side view of the suction and movement device of the glass lens manufacturing apparatus, as seen in the direction 3 in FIG. 1. FIG. FIG. 4 is a diagram for explaining the operation of the suction and movement cylinder used in the suction and movement device. FIG. 5 is a block diaphragm showing the operating system of the adsorption/transfer cylinder shown in FIG. 4. FIG. 6 is a side view of a pad attached to the tip of a hollow suction rod of the suction moving device.

FIG. 7 is a bottom view of the pad of FIG. 6.

First, the overall structure of the glass lens manufacturing apparatus of the present invention will be explained with reference to FIGS. 1 to 3.

The glass lens manufacturing device 40 includes a molding machine 42 and a heating furnace 4.
Although the details will be described later, the molding machine 42 adsorbs the heated glass and transfers it to the molding section 4 of the molding machine 42 from the heating furnace 44.
8. As shown in FIG. 2, the molding machine 42 has a frame 50 that includes an upper plate 52, an intermediate plate 54, and a lower plate 56. A plurality of press cylinders 58 (particularly six cylinders in this embodiment) are attached to the upper plate 52, and a plunger (or rod) 60 of the press cylinders 58 is guided by the intermediate plate 54. It extends downwardly through the intermediate plate 54, and an upper mold 62 is attached to its lower end. The upper mold 62 is moved by the operation of the cylinder 58.
It is moved up and down between a molding position where it is lowered toward a lower mold 66 to press the glass placed in the lower mold 66 and a retracted position where it is retracted upward.

A drum 64 is attached to the lower part of the frame 50 so as to rotate about a shaft 68 . The drum 64 has plates 6 on two adjacent sides.
5 (only the upper plate is shown in the drawing) is attached to the plate 65, and a plurality of lower molds 66 (six in this embodiment) are attached to the plate 65. This drum 64 is
9 between the molding position and the ejection position, similar to prior art devices.
The molded glass lens is rotated by 0" and is ejected from the ejecting position by a cylinder (not shown). The upper mold 62 and the lower mold 66 constitute the molding section 48.

The heating furnace 44 has a heating furnace main body 47 placed on the top of a base 45.
In the heating furnace body 47, the glass is heated to an appropriate temperature while being placed in a number of heating dishes arranged side by side.

Next, referring to FIGS. 1 and 3, the suction moving device 4
6 will be explained. The suction moving device 46 has a mount 70 made of a plate. The tip of a plunger (or rod) 83a of a cylinder 83 for moving the gantry is fixed to the lower end of the frame. The horizontal movement of the pedestal 70 is performed by the operation of a pedestal movement cylinder 83, and the pedestal 70 is moved so that the pad at the tip of a hollow suction rod 82 attached to the pedestal 70, which will be described later, is placed on a heating plate in the heating furnace main body 47. The molding position is such that the pad is in the furnace position, the pad is in the molding section of the molding machine, and the hollow suction rod is completely out of the molding section in a retracted position.

A support plate 76 that protrudes laterally is fixed to the pedestal 70, and a suction/movement cylinder 7, which will be described in detail later with reference to FIGS. 4 and 5, is attached to the support plate 76.
2, and a vacuum cylindrical body 74 attached to this suction/transfer cylinder. A joint 78 is attached to the lower end of the hollow plunger 73 of the cylinder 72 for suction and movement, and a hollow suction rod 82
is attached removably. A vertical slot 70a is formed in the plate of the pedestal 70, and the hollow suction rod 82 is attached to pass through the slot 70a, thereby allowing the hollow suction rod 82 to move up and down.

Next, referring to Section 4 and FIG. 5, the operation of the suction/transfer cylinder 72 and the operating system for operating the suction/transfer cylinder 72 are shown.

Particularly, referring to FIG. 5, compressed air from a pressurization source 90 is supplied to a four-way solenoid valve 94 via a pressure reducing valve 92, and from this solenoid valve 94 via a vacuum valve 98 to an adsorption/transfer cylinder 72. from this solenoid valve 94 to the other boat 72b via a speed controller 96. Switching of the solenoid valve 94 is performed by energizing the solenoid 94a or 94b,
The cylinder 7 for suction and movement is activated by the solenoid 94a.
Compressed air is supplied to the second boat 72a, and compressed air is supplied to the boat 72b of the suction and movement cylinder 72 by the energization of the solenoid 94b.

When compressed air is supplied to the boat 72a of the adsorption/transfer cylinder 72, a negative pressure generator (not shown) inside the cylinder
is activated, and the vacuum cylindrical body 74 mentioned above (Fig. 1, Fig. 3)
is made a negative pressure, and the hollow plunger 73 of the suction/transfer cylinder 72 is caused to generate suction. In particular, as shown in FIG. 4, the plunger 73 is lowered at the same time as the above-mentioned suction by the plunger 73, and when it comes into contact with the object (heated glass in the case of the present invention), the lowering stops and the glass is adsorbed. At the same time, the plunger 73 rises to the 0th order,
When the solenoid 94b of the electromagnetic valve 94 is energized, compressed air is supplied to the boat 72b of the adsorption/transfer cylinder 72, and at this time the plunger 73 descends while adsorbing the glass, and releases the glass at the end of its descent. The suction/movement cylinder 72 preferably uses a built-in air sensor (not shown) during suction without further lowering the plunger, that is, without pressing the glass.
It is configured to rise as soon as adsorption is detected. The above-mentioned adsorption/transfer cylinder is configured to be able to perform suction using a single pressure source, but instead of this adsorption/transfer cylinder, a cylinder and a vacuum pump can be combined to achieve the same effect. It may be configured to do so.

Next, the pad attached to the tip of the hollow suction rod 82 will be described with reference to FIGS. 6 and 7. A cup-shaped connecting fitting 84 is attached to the tip of the hollow suction rod 82, and a cavity 84a is formed inside the connecting fitting 84, and a thread is formed at the lower end of the outer surface. A replacement pad 86, preferably made of stainless steel, is screwed into the connecting fitting 84 and detachably attached thereto. The lower surface of the exchange pad 86 is formed into a slightly concave shape suitable for adsorbing glass, and has a large number of fine holes 88 for adsorption. Depending on the characteristics of the glass lens to be manufactured, replacement pads 86
Various types having different sizes, shapes, number of microholes, etc. are prepared, and can be replaced for each type of glass lens to be manufactured.6 In particular, since the replacement pad 86 has a large number of microholes formed During adsorption, air flow due to suction occurs over a relatively wide area of the glass surface, and does not result in a concentrated air flow as would occur in the case of just one large opening, making it difficult to identify the glass surface. This avoids the phenomenon of cooling only one part in particular.

Although various cylinders are used in the glass lens manufacturing apparatus of the present invention, these cylinders are preferably pneumatic cylinders.

Next, the operation of the glass lens manufacturing apparatus of the present invention will be explained.

Initially, the pedestal 46 is in the leftmost retracted position as viewed in FIG. 1, and the upper mold 62 is also in the upper retracted position. In this state, the pedestal moving cylinder 83 is actuated to move the pedestal 46 to the right so that the pad 86 at the tip of the hollow suction rod 82 is attached to the heated glass in the heating tray in the heating furnace main body 47. When the zero order is brought to the upper position, that is, the in-furnace position, the solenoid 94a of the solenoid valve 94 is energized,
The hollow plunger 73 of the suction/transfer cylinder 72 descends, thus lowering the pad 86 and bringing the pad 86 into contact with the glass in the heating dish. At the same time that the pad 86 comes into contact with the glass, the glass is attracted, and an air sensor (not shown) built in the suction and movement cylinder senses this and raises the hollow plunger.Next, the frame movement cylinder 83 is activated again. Bad 86 adsorbing glass
At the same time, the pedestal 70 is brought to the molding section 48 of the molding machine.

Next, the solenoid 94b of the solenoid valve 94 is energized to lower the pad that has adsorbed the glass and place the glass open in the lower mold 66. Unlike dropping, the glass is lowered from directly above, making it possible to accurately position the glass in the center of the lower mold.
Next, the pedestal moving cylinder 83 is further actuated, and the pedestal 7o is brought to the retracted position where the hollow suction rod has completely come out from the molded part. Next, the press cylinder 58 is operated to lower the upper mold 62 attached to the lower end of the first langeer 60. This lowering causes the glass to move into the lower mold 66.
and an upper mold 62 to form a glass lens. In addition, as for the press cylinder 58, the cylinder pressure is cut off when the upper mold 62 is directly above the lower mold 66.
After that, it is preferable that the glass is pressed by its own weight. The molding time (pressing time) is appropriately selected depending on the shape and type of the glass.

Next, the drum 64 is rotated by the actuation of a cylinder (not shown) to bring the molded glass lens to the ejection position, and the middle mold of the lower mold is moved backward by the actuation of the cylinder (not shown). The glass lens is released by pressing from.

The same aircraft will continue to manufacture glass lenses.

(Effects of the Invention) As explained in detail above, the present invention provides a molding machine that moves between the molding machine and the heating furnace, adsorbs the glass heated in the heating furnace, and absorbs the glass into the molding part of the molding machine. By installing a suction moving device for transporting the glass to the lower mold, the troublesome work previously performed by workers can be eliminated, and the glass can be accurately positioned with respect to the lower mold, so there is no vibration required for positioning. Eliminates the need to install equipment.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a glass lens manufacturing apparatus. FIG. 2 is a schematic cross-sectional view taken along line 2--2 of FIG. 1 to show the molding section of the glass lens manufacturing apparatus. FIG. 3 is an enlarged side view of the suction and movement device of the glass lens manufacturing apparatus, as seen in the direction 3 of FIG. 1. FIG. 4 is a diagram for explaining the action of the suction and movement cylinder used in the suction and movement device. FIG. 5 is a block diaphragm showing the operating system of the adsorption/transfer cylinder shown in FIG. 4. FIG. 6 is a side view of a pad attached to the tip of a hollow suction rod of the suction moving device. FIG. 7 is a bottom view of the pad of FIG. 6. FIG. 8 is a perspective view of a conventional glass lens manufacturing apparatus with the chute section removed. FIG. 9 is a perspective view taken along line 9--9 of FIG. 8, including the chute. 40... Glass lens manufacturing device, 42... Molding machine, 44... Heating furnace. 46... Adsorption movement device, 48... Molding section, 49... Heating plate, 58... Press cylinder, 62... Upper mold, 64... Drum, 66... Lower mold Mold, 70... Frame, 72... Cylinder for suction and movement, 82... Hollow suction pad, 83... Cylinder for moving frame, Fig. 2 86... Pad. fig fig fig bud fig fig fig fig fig.

Claims (4)

[Claims] (1) In a glass lens manufacturing apparatus consisting of a heating furnace that heats glass to be made into lenses placed in a heating dish and a glass lens molding machine placed close to the heating furnace, the glass lens molding machine The glass forming section consists of an upper mold that is placed above the lower mold and can move up and down, and the molding position where the heated glass is transferred from the furnace position where the heating plate is placed to the molding section of the molding machine. A glass lens manufacturing apparatus comprising: a suction moving device configured to move the glass lens. (2) In the glass lens manufacturing apparatus according to claim 1,
The suction/transfer device is connected to a pedestal, a suction/transfer cylinder fixed to the pedestal, and the suction/transfer cylinder, and the suction/transfer cylinder is operated to adsorb heated glass at its tip. and a hollow suction rod which is opened and moved up and down, and which is fixed to the frame of the molding machine and connected to a pedestal so that the tip of the hollow suction rod can be moved between the in-furnace position and the molding position. A glass lens manufacturing device comprising: a cylinder for moving a pedestal; (3) In the glass lens manufacturing apparatus according to claim 2,
A glass lens manufacturing apparatus characterized in that the pedestal is configured so that the hollow suction rod also assumes a retracted position where it exits from a molding section of a molding machine. (4) In the glass lens manufacturing apparatus according to claim 2,
A glass lens manufacturing apparatus characterized in that a suction pad is attached to the tip of the hollow suction rod, and the suction pad has a large number of microholes formed on its lower surface for suctioning heated glass.