JPH0653576B2 - Method and apparatus for conveying press gob and press lens - Google Patents

Description

TECHNICAL FIELD The present invention relates to a press gob and a press lens conveying device in a lower die push-up type glass press lens molding device, and more specifically, to a press gob as a molding device. The present invention relates to a conveying device that conveys a molded press lens to a press molding device.

(Prior Art) As a conveying device for manufacturing a glass press lens by press working a glass lump (gob) whose weight is regulated in advance, the present applicant has previously proposed it (Japanese Patent Application No. 59-35011). No.) "Optical Element Molding Method and Apparatus" disclosed in the publication, "Gob for Press and Press Lens Conveying Device".

FIG. 8 is a sectional view of the main parts of the press gob and the press lens transport device. In the figure, reference numeral 1 is a pair of rail-shaped belt conveyors, 2 is a press gob and a press lens transport device table placed on the belt conveyor 1 and transported in the longitudinal direction, and 3 is on the mounting table 2. Through holes through which lower molds 7 of the press, which are bored at equal intervals in the longitudinal direction of the press, are inserted, 4 is a press gob which is a lens material, and 5 is provided on the inner surface of the through holes 3 of the mounting table 2. Gob for press 4
Mounting step portion, 6 is a fixed upper mold having a lens curved surface 6a on the lower surface, and 7 has a lens curved surface 7a on the upper surface and is slidably arranged relative to the upper mold 6. The respective lower molds are shown.

The upper mold 6 and the lower mold 7 are arranged between a heating furnace and a slow cooling furnace (not shown), and the transfer table 2 on the conveyor belt 1 is intermittently provided between the upper mold 6 and the lower mold 7. Move
When the through hole 3 of the mounting table 2 is located between the upper die 6 and the lower die 7, the mounting table 2 is stopped and the lower die 7 is pushed up toward the upper die 6 through the through hole 3. It is like this.

The above-mentioned mounting table 2 is hard to bond with glass as a lens material, for example, boron nitrite or the like is used, or ceramic coating such as chrome oxide and titanium nitride is applied.

In the transporting device thus configured, first, the press gob 4 of the glass gob softened by being heated to a predetermined temperature together with the mounting table 2 in a heating furnace (not shown) is moved to the position shown in FIG. The upper die 6 and the lower die 7 are conveyed onto the press shaft. Then, when it reaches the press axis, the operation of the belt conveyor 1 is temporarily stopped. Next, the lower mold 7 is raised at a moving speed of, for example, about 250 mm / min. At this time, the temperature of the upper mold 6 is set to be about 100 ° C. lower than the temperature of the press gob 4, and the lower mold 7 is set to be about 10 ° C. higher than that of the upper mold 6. The lower die 7 is the through hole 3 of the mounting table 2 described above.
The press gob 4 from the mounting table 2 to the upper die 6
It is pushed up toward and is pressed by upper and lower molds 6 and 7 to form a press lens 8 as shown in FIG. Next, after the press lens 8 is cooled to near the mold temperature and solidified, the lower mold 7 is lowered. At this time, the lower mold 7 is the upper mold 6
Because of the higher temperature, the press lens 8 separates from the upper mold 6 and preferably separates from the lower mold 7. When the lower die 7 passes through the through hole 3 of the mounting table 2, the press lens 8 is released from the lower die 7 whose peripheral edge is received by the peripheral edge of the through hole 3 and placed on the mounting table 2. It Next, the press lens 8 is moved by the operation of the belt conveyor 1 to the mounting table 2
It is designed to be transported into each cooling furnace. The above is the outline of the conventional conveying device.

(Problems to be Solved by the Invention) However, in such a conventional transfer device, the entire device becomes large in size, and an expensive material is used for the mounting table, or coating is applied, resulting in high cost. In addition, the mounting table must be replaced according to the shape of the lens, which is troublesome, and the press lens is molded and released, and then mounted on the flat plate of the mounting table. Since it is transported in an unstable state because it is only on the mold, and when the mold is released from the lower mold, the shock causes the lens fragments to drop into the lower mold, and the fragments adhere to the next press lens. However, it has a number of drawbacks such as deterioration of molding yield. An object of the present invention is to eliminate the above-mentioned drawbacks in the conventional press gob and press lens transport device.

(Means for Solving Problems and Actions Thereof) In the present invention, as shown in FIGS. 1 to 6, the press gob 26 is detachably mounted on the intermittently transferred transport tracks 14a and 14b. And, as well as skillfully utilizing the gob carrier 12 and the lens carrier 13 that can hold the press lens 34 in a stable state, respectively, as a means for transporting these carriers 12, 13 between the transport caterpillars 14a, 14b and the molding apparatus 15, respectively. , A press gob and a press lens carrying arm 18, 19 which operate in a direction perpendicular to the carrying direction of the pressing gob and the press lens carrying caterpillars 14a, 14b which are parallel to each other.
And a lens drop claw 40 (see FIG. 6) for releasing the molded press lens 13 from the tip of one of the press lens carrying members 19,
26, the press lens 34 is transported between the transport caterpillars 14a, 14b and the molding device 15 in a stable state via the gob carrier 12, the lens carrier 13, the press gob carrying member 18, and the press lens carrying member 19, respectively. At the same time, the trouble caused by the generation of debris when the press lens 34 is released is completely eliminated.

(Example) Hereinafter, the present invention will be described based on illustrated examples.

FIG. 1 is a plan view showing a schematic configuration of a press gob and a press lens transport device showing an embodiment of the present invention.
FIG. 2 is an enlarged sectional view taken along line AA in FIG. As shown in FIGS. 1 and 2, the conveying device 9 of this embodiment includes a heating furnace 10 and a slow cooling furnace 11 which are arranged in parallel on both sides of a press molding device 15, and these heating furnace 10 and slow cooling furnace. 11
The transfer caterpillars 14a and 14b, in which the gob carrier 12 and the lens carrier 13 are placed at equal intervals, respectively, are intermittently driven by the drive gear 33, the molding device 15, and the heating furnace 10.
Of the final heating heater section 16 and the gradual cooling start heater section 17, which are respectively arranged between the outlet and the inlet of the slow cooling furnace, the gob carrier 12 and the lens carrier 13 between the molding apparatus 15 and the transport tracks 14a, 14b, respectively. Gob carrier carrying arm 18 and lens carrier carrying arm 19 for carrying
Its main part consists of.

As shown in FIG. 2, the press molding device 15 is composed of an immovable upper mold 20 and a movable lower mold 21, and the device cover 22, the final heating heater part 16 and the slow cooling start heater part 17 are integrated. Has been done.

As shown in FIG. 3, the gob carrier 12 has a ring shape and is slightly (about 0.1 mm) closer to the lower portion of the inner peripheral surface than the outer diameter of the press gob 26 (see FIGS. 1 and 2). A gob mounting step portion 24 having a large inner diameter is provided, and a relief portion 25 having a larger diameter is provided on the upper portion thereof so that the gob 26 can be easily removed. Further, in the lower part of the gob carrier 12, a through hole 27 (second
A fitting portion 29 having an outer diameter that allows a loose fitting is provided, and a flange 28 that serves as a catching portion during transportation is provided at the upper end portion.

As shown in FIG. 4, the lens carrier is bowl-shaped, and the inner bottom surface is a lens holding portion 30 that holds the press lens 34 (see FIGS. 1 and 2). A fitting portion 31 and a flange 32, which are similar to those of the gob carrier 12, are provided in each. The gob carrier 12 and the lens carrier 13 have the press gob 26 and the press lens 34 mounted thereon, respectively, and are transported by the respective transport caterpillars 14a and 14b.

The gob carrier carrying arm 18 carries the gob carrier on the gob carrier carrying caterpillar 14a between the upper and lower molds of the press molding apparatus 15, and is carried by a drive device 35 having its base end directly connected. The caterpillar 14a is driven horizontally at a right angle to the transport direction and also vertically. And its tip
As shown in FIG. 5, two parallel pressing plates 36a and 36b, whose central ends are cut so as to sandwich the flange 28 of the gob carrier 12, are attached to the 18a by mounting screws 37. .

The lens carrier carrying arm 19 includes the molding device 15
The press lens 34 molded by
A drive device 38 that is dropped into the lens carrier 13 and is transported to the lens carrier 13 and the lens transport caterpillar 14b. The drive device 38 performs the same drive operation as the drive device 35 of the arm 18 similar to the gob carrier transport arm 18 described above. Is connected to the base end portion, and the tip end portion 19a has a support portion 39 which is cut so that the center portion of the tip end can scoop up the flange 32 of the lens carrier 13 from below as shown in FIG. On top of that, the lens drop claw 40, which has a taper cut at the center of the tip facing the support 39, is attached with a screw.
Installed by 41.

Next, the operation of the press gob and the press lens transport device 9 in the present embodiment configured as described above will be described.

First, as shown in FIG. 1, through holes 2 formed at equal intervals on a transport caterpillar 14a exposed to the outside of the inlet of the heating furnace 10.
7 (see FIG. 2), the press gob 26 and the mounting step 24
The gob carrier 12 placed on the is pierced and placed.
Next, the press gob mounted on the gob carrier 12
26 is heated and conveyed by the above-mentioned transfer caterpillar 14a which intermittently moves in the direction of arrow b so as to reach a temperature which is several tens of degrees lower than a predetermined molding temperature at the time of pressing in a saturated manner, and the same heating is performed. The inlet to the final heater section 16 of the furnace 10 is reached. Then, the gob carrier 12 reaching the same entrance is carried by the gob carrier carrying arm 18 in the final heating heater section 16 toward the inside of the forming device 15 in a direction perpendicular to the traveling direction of the carrying caterpillar 14a. It That is, the carrying arm 18 is moved from its waiting position (the position shown in FIG. 1) by the driving device 35 to the carrying caterpillar 14a.
It moves horizontally toward the upper gob carrier 12 and holds the lower part of the flange 28 of the gob carrier 12 by the pressing plates 36a and 36b at the tip end thereof. Next, after the gob carrier 12 is lifted by the driving device 35, the gob carrier 12 is moved to the central portion of the final heating heater section 16 and temporarily stopped at the central portion for a few minutes to make the gob 26 on the gob carrier. The temperature of is raised to a predetermined molding temperature. The gob carrier 12 on which the press gob 26 that has reached a predetermined temperature is placed is
It is transported to the central part between the upper and lower molds 20, 21 in 15. In synchronization with this, the lower mold 21 starts to rise, and the press gob 26 is inserted through the through hole 23 of the carrier 12 and pushed up from the gob carrier 12 to perform press molding, and after pressing for several tens of seconds, the lower mold 21 descends. Then the press is completed. At this time, since the upper die 20 is controlled to have a higher temperature (several tens of degrees) than the lower die 21, the press lens 34 is separated from the lower die 21 and is in close contact with the upper die. After the pressing is completed, the carrying arm 18 moves horizontally backwards to return the empty gob carrier 12 to the original position on the carrying caterpillar in the heating furnace 10, and then the initial waiting position (see FIG. 1). Position). On the other hand, the lens carrier carrying arm 19
In synchronism with the completion of the molding of the press lens 34, the drive device 38 drives the waiting lens at the entrance to the slow cooling start heater part 17 of the slow cooling furnace 10 from the waiting position shown in FIG. It moves horizontally toward the lens carrier 13 on the track caterpillar 14b, and the support plate 39 at the tip thereof is made to enter below the flange 32 of the lens carrier 13. Then its drive 38
The lens carrier 13 is lifted by and moved horizontally to convey it to the lower part of the upper mold 20 in the molding device 15. As shown in FIG. 7, the carrying-in position at this time is a position where the press lens 34 is sandwiched between the lens carrier 13 and the lens dropping claw 40. From this state, when the carrying arm 19 is pulled down by the driving device 38 in the direction of the arrow c below, the taper-shaped lens drop claw 40 formed on the tip of the arm 19 and the press attached to the upper die 20 are pressed. The lens 34 gradually contacts and is dropped into the lens holding portion 30 of the lens carrier 13. Then a lens carrier holding the press lens 34
13 is returned to the original position in the slow cooling furnace 11 through the slow cooling start heater unit 17 by the transport arm 19, and the transport arm returns to the initial expected period position. The press lens 34 is
Gradually cooled while passing through the slow cooling start heater unit 17,
After being transferred onto the transport caterpillar 14b, the caterpillar 14b is further cooled while being transported in the slow cooling furnace 11 by intermittent movement of the caterpillar 14b.
It is taken out from the lens carrier 13 on the upper side. After the completion of the transfer operation of the series of the press gob 26 and the press lens 34 as described above, the transfer caterpillars 14a and 14b move the next gob carrier 12 and the lens carrier 13 to the arrows b and d (first, respectively).
By intermittently moving in the direction (see the drawing), the conveying operation of the next molding operation is performed in the same manner.

As described above, according to the present invention, by simply providing the gob carrier and the lens carrier having a simple structure, the gob carrier and the lens carrier carrying arm are cleverly used, so that the conventional carrier device of this type is provided. It is possible to provide a method and an apparatus for transporting a press gob and a press lens, which solve the above-mentioned drawbacks.

(Effects of the Invention) As described above, the press gob and the press lens transport device according to the present invention need to use an expensive material for the mounting table for transporting the press gob and the press lens, or to perform coating. The cost can be further reduced. Since the gob carrier and the lens carrier which have a simple structure and can be easily replaced according to the shape of the lens are used, the versatility of the entire apparatus is high. By using the gob carrier and the lens carrier, the press gob and the press lens can be stably conveyed before and after molding. Since the collection method that uses the lens carrier and the lens carrier carrying arm is adopted, it is possible to reliably prevent debris and foreign matter from falling to the lower mold when the press lens is released from the mold, improving the yield of molded products. You can

[Brief description of drawings]

FIG. 1 is a schematic plan view of a press gob and a press lens conveying device showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along the line AA in FIG. FIG. 4 and FIG. 4 are enlarged cross-sectional views respectively showing the gob carrier and the lens carrier used in the press gob and the press lens conveying device of FIG. 1, and FIGS. FIG. 7 is an enlarged perspective view showing a configuration example of a distal end portion of a lens carrier carrying arm used for a press gob and a press lens carrying device, and FIG. 7 is a cross-sectional view of essential parts showing a mode of releasing the press lens, Figure 8 is a fragmentary cross-sectional view showing an example of a transport device of a conventional press the gob and the press lens, FIG. 9 is a cross sectional view showing the operation mode of the press apparatus of the FIG. 8, 9 ...... Conveying device for press gobs and press lenses 12 …… Gob carrier 13 … Lens carrier 14a …… Press gob transport caterpillar (transport member) 14b …… Press lens transport caterpillar (transport member) 15 …… Molding device 18 …… Gob carrier transport arm (transport member) 19… … Lens carrier carrying arm (carrying member) 26 …… Press gob 34 …… Press lens 35, 38 …… Drive device (driving member) 40 …… Lens drop claw

Claims (4)

[Claims] 1. A method of transporting a press gob and a press lens in a lens molding apparatus, comprising the step of placing a ring-shaped gob carrier accommodating the press gob on a heating transport line to heat the press gob. A step of transferring the gob carrier accommodating the press gob from the heating transfer line between an upper mold and a lower mold, and raising the lower mold to push up the press gob from the gob carrier to perform press molding. After that, the step of transferring the press lens closely attached to the upper mold into the bottomed lens carrier transferred between the upper and lower molds, and the lens carrier accommodating the press lens is transferred to an annealing line to gradually press the lens. A method of transporting a press gob and a press lens, comprising: a step of cooling. 2. A method of transporting a press gob and a press lens in a lens molding apparatus, comprising: a ring-shaped gob carrier that holds the press gob and is detachable from the transport member; The bottomed lens carrier that is detachably attached to the carrying member and the press gob housed in the gob carrier are carried between the carrying member and the upper mold and the lower mold. A press gob carrying member for carrying, and a press lens carrying member for carrying the molded press lens pressed by the upper die and the lower die to the carrying member from between the upper and lower dies. Conveying device for press gobs and press lenses. 3. The press gob and the press lens carrying member are directly connected at their base ends to driving members which are driven in the horizontal direction and the vertical direction, respectively. Conveying device for press gob and press lens described. 4. The press gob according to claim 2, wherein a drop claw for releasing the press lens from the upper mold is provided at the tip of the press lens carrying member. And press lens transport device.