JPH01282134A - Transferring method in glass molding apparatus - Google Patents

Abstract

PURPOSE:To transfer glass stock without using an expensive gob tray and to reduce the cost by putting the stock on a magazine through a transfer arm and successively transferring the stock to a preheating furnace, a heating furnace and a molding point. CONSTITUTION:Glass stock 44 is put on a magazine 16, this magazine 16 is carried in a preheating furnace 18 and the stock 44 is preheated. This preheated stock 44 is pushed up by a pushing member 48 and a transfer arm 43 is moved to hold the stock 44 in a glass stock holding part 46. This held stock 44 is carried in a heating furnace 19 through the arm 43 and heated. The stock 44 softened by heating is transferred to a molding point 22 through the arm 43 and molded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a method for molding a glass material into a desired shape using upper and lower molds. The present invention relates to a method for transporting a glass molding device to a molding point.

[Conventional technology]

This type of conveyance method is described in Japanese Patent Application Laid-open No. 62-1821.
There is a technique disclosed in Publication No. 21. This technique includes the steps of: placing an inverted truncated cone-shaped gob plate on which an optical glass material is placed on a member having a placement part having a shape corresponding to the gob plate and transporting the same into a preheating furnace; A step of pushing up the optical glass material preheated in the step above from the member together with the gob plate, and moving the transfer arm to transfer and hold the gob plate pushed up in the step onto the transfer arm. a step of transporting the gob plate held on the arm into the main heating furnace via the transport arm; and a step of transporting the optical glass material heated and softened in the step through the transport arm. This process consists of a step of transporting the molding material to the molding point within the molding chamber.

According to the conventional transfer means, when transferring the gob plate from the top of the magazine to the transfer arm, the gob plate is temporarily pushed up from above the magazine and the pushed up gob plate is transferred onto the transfer arm. There is only one transfer point,
As a result, it is possible to reliably prevent transport errors of the gob plate and to always accurately transport the gob plate to the transport point.

[Problems to be Solved by the Invention] The conventional conveying method described above uses a conveying member called a gob plate to preheat the glass material in nine heating furnaces.

Since it is a means of transporting the gob plate to the forming point, the material of the gob plate must be durable at high temperatures. Materials that satisfy these conditions include Hastelloy,
There are cemented carbide 1 ceramics, etc., but all such materials are extremely expensive.Moreover, in the conventional technology described above, which uses gob plates because a large number of gob plates are used in the conveyance process, the overall equipment itself is extremely expensive. The problem was that it was expensive. Further, as a necessary result, there is a problem that the molded product becomes extremely expensive.

The present invention has been made in view of the problems of the prior art described above, and an object of the present invention is to provide a transport method for a glass forming apparatus that transports a glass material without using a gob plate.

[Means and effects for solving the problems] The conveying method of the present invention includes a magazine having a plurality of placement parts each having a shape corresponding to the glass material. ! A step of placing the glass material on the mounting section and transporting it into a preheating furnace, a step of pushing up the glass material preheated in the above step from the magazine, and a step of pushing up the glass material pushed up in the above step. , a step of moving the transfer arm to transfer and hold the glass material onto the support section thereof; and a step of transferring the glass material held on the support section of the transfer arm into the main heating furnace via the transfer arm. , a step of transporting the glass material that has been heated and softened in the above step to a molding point in the molding chamber via the transport arm, and according to this method, the glass material can be heated and softened without using an expensive gob plate. Preheat the material in a furnace.

It can be transported to the main heating furnace and the molding point.

〔Example〕

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

(First Embodiment) FIG. 1 is a perspective view of a glass forming apparatus 11 for implementing the glass material conveying method of the glass forming apparatus according to the present invention, and FIG. 2 is an understanding of each structure of FIG. 1. 1 is a schematic explanatory diagram of a glass forming apparatus l shown in a cross section to facilitate the process.

As shown in the figure, the glass molding device 11 includes a molding main body 14 equipped with upper and lower molds 12.13, and a mold release ring drive for releasing the molded glass lens from the upper and lower molds 12.13. 15, a transport arm drive unit 23 for transporting the glass material 44 placed on the magazine 16 to a preheating furnace 189 (electric furnace) 19 and a molding point 22 in a molding chamber 20, and a device. It is composed of a base 24 and the like.

The upper and lower molding molds 12 and 13 are formed by four pillars 2 erected on a lower plate 26 fixed to a table 25 on a molding base 24.
7, a cover 28 that closes the periphery of the molding chamber 20, and an upper plate 29. The upper mold 12 is fixed to a holder 30 fixed to the inner surface of the upper plate 29 via a mounting ring 31, and the lower mold 13 is supported so as to be vertically movable via a bearing 32 mounted on a table 25. It is fixed to a movable shaft 33 via a mounting ring 34. 35 and 36 are heaters.

The upper and lower molds 12.13 have release rings 37. for releasing the molded glass lens from the winter mold 12.13.
38 are loosely fitted, and each mold release ring 37 , 38 is configured so that its mold release function is exerted through upper and lower arms 39 , 40 that are moved up and down via the drive unit 15 . The movable shaft 33 on which the lower die 13 is fixedly mounted is set to be vertically driven by an eccentric cam 42 which is rotationally driven via an encoder 41.

The transfer arm drive section 23 is for driving the transfer arm 43, and is set so that the transfer arm 43 can be controlled to stop at the 185 preheating furnaces, the heating furnace 19, and the forming point 22. The glass material 44 is the glass material placement section 5
A glass material and a glass lens are mounted and supported on a magazine 16 having a mounting section for glass lenses after molding, and are formed at the tip of a transport arm 43 as shown in FIGS. 3a and 3b. It is adapted to be transferred and supported on the support part 45 of the. FIGS. 4a, b, and c show a configuration for transferring the glass material 44 on the magazine 16 onto the support portion 45 of the transport arm 43.

Shown in d. That is, as shown in FIGS. 2 and 4 a,
A cylinder 46 for pushing up the glass material 44 is provided below the magazine 16, and as shown in FIG. 4, the piston rod (movable rod) of this cylinder 46
The glass material 44 is temporarily pushed up from above the magazine 16 by a push-up portion 48 at the tip of the magazine 47.

The transport arm 43 is disposed at the upper side of the magazine 16, and is moved in the direction of arrow 49 in FIG. It is set so that the piston rod 47 is moved into a position where its axial center is coaxial with the axial center of the support portion 45. Then, by operating the piston rod 47 downward in the state shown in FIG.
The settings are configured so that it can be transferred to the 5th page. Reference numeral 45a indicates the support portion of the glass lens after molding.

The magazine 16 carrying a plurality of glass materials 44 is transported sequentially from the supply chamber 51, and the magazine 16 that supports the glass lenses after molding is stored in the storage chamber 52. The settings are configured. Supply room 5
Each glass material 44 on the magazine 16 that is sequentially transported from inside the magazine 16 is first controlled to stop inside the preheating furnace 18. The preheating furnace 18 is for preheating the glass material 44 on the magazine 16 to a temperature of about 400° C., and is configured so that the preheating can be performed using an infrared heater 53 disposed within the furnace 18. It is.

The glass material 44 preheated in the preheating furnace 18 is
It is transferred onto the transfer arm 43 by the transfer mechanism section shown in FIGS. It is set so that it is set to J. The main heating furnace 19 heats the preheated glass material 44 at a temperature above the transition point.
For example, by heating at a temperature of 600°C or higher, the glass material 44
The heating furnace 19 is constructed using an electric furnace to soften the glass material 44 to a moldable state. This is because it will be done.

A method for conveying the glass material 44 using the above configuration will be described.

- First, the magazine 16 carrying the glass material 44 is carried into the preheating furnace 18, and the glass material 44 is heated to about 40'C.
Heat to a moderate temperature.

-Step 1- The glass material 44 preheated in the first step is transferred from the top of the magazine 16 to the top of the transport arm (loading arm) 43. In this case, as shown in FIGS. 4a and 4b, first, the piston rod 4 of the thrusting cylinder 46 is
7 is moved upward, and the push-up portion 48 pushes up the glass material 44 from above the magazine 16.

11 Main Work - Next, as shown in FIG. 4C, the transfer arm 43 is advanced to a position where the axis of the support part 45 is aligned with the axis of the piston rod 47 through the groove 50. to stop it.

Thereafter, the piston rod 47 is moved down as shown in FIG. 4d. As a result, the glass material 44 is automatically placed on the support portion 45 of the transport arm 43.

-" Second mouth i- The glass material 44 held on the transport arm 43 is transported into the main heating furnace 19 via the transport arm 43, and the glass material 44 is heated to a temperature equal to or higher than the transition point temperature of the glass and molded. Soften to the desired viscosity.

-''52 bean- The heat-treated glass material 44 is conveyed to the molding point 22 in the molding chamber 20 via the conveyance arm 43.

1st I construction hill - The glass lenses molded in the upper and lower molds 12 and 13 are again placed on the transport arm 43 (in this case, the support part 45
a) and the second. The glass lens is transferred from the transport arm 43 to the magazine 16 in the reverse order of the third step.

In the above first to fifth steps, the glass material 44 is conveyed from above the magazine 16 to the forming point 22, and in the sixth step, the glass lens after forming is placed on the magazine 16 again. .

As described above, the method of this embodiment does not use any of the expensive gob plates used in the conventional method (glass material 44.
Since this is a method for transporting glass lenses, which are molded products,
This makes it possible to significantly reduce the manufacturing cost of glass lenses.

(Second Embodiment) FIG. 5 shows a sectional view of a conveying device for carrying out a second embodiment of the conveying method according to the present invention. It should be noted that in the transport device of this embodiment, the configuration other than the transport arm 43 is the same as that of the first embodiment, so illustration and description thereof will be omitted.

The feature of this embodiment is that the outer peripheral surface 44a of the glass material 44 is formed into a tapered surface, and the fitting surface 45b with the glass material outer peripheral surface 44a in the transport arm 43 is formed into a tapered surface corresponding to the glass material outer peripheral surface 44a. When the glass material 44 on the magazine 16 is transferred onto the transport arm 43, the glass material outer circumferential surface 44a and the fitting surface 45b of the transport arm 43 are set so as to fit together.

In the process of transferring the glass material 44 from the top of the magazine 16 to the top of the transport arm 43 using the transport arm 43 of this embodiment, the mutual fitting portions 44a and 45b of the glass material 44 and the transport arm 43 are in a tapered fitted state. Therefore, the occurrence of backlash between the glass material 44 and the transport arm 43 can be reliably prevented. Therefore, in the process of transporting the glass material 44 to the forming point 22 via the transport arm 43,
The glass material 44 is accurately conveyed to the forming point 22.

It has the advantage of being positionable. The method of controlling the movement of the transport arm 43, other steps, and effects are the same as those of the first embodiment, so the explanation thereof will be omitted.

[Effects of the Invention] As described above, the conveying method of the present invention is a method for conveying glass materials without using any expensive gob plates.
The manufacturing cost of glass lenses can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an implementation apparatus of a first embodiment of the method according to the present invention, FIG. 2 is a cross-sectional view for understanding the configuration of FIG. 1, and FIGS. 3 a and b
is a cross-sectional view of the tip of the transfer arm. Perspective views; Figures 4a, b, c, and d are process explanatory diagrams of the first embodiment of the present invention; Figure 5 is a cross-section of essential parts of an implementation apparatus of the second embodiment of the method according to the present invention; It is a diagram. 16... Magazine 18... Preheating furnace 19... Main heating furnace 43... Transfer arm 44... Glass material patent applicant Olympus Optical Industry Co., Ltd. Figure 3 (a) (b) 4 Figure 4 (c) (d)

Claims (1)

[Scope of Claims] A step of placing the glass material on the placement section of a magazine having a plurality of placement sections each having a shape corresponding to the glass material and conveying the same into a preheating furnace; and preheating in the step. a step of pushing up the glass material pushed up from the magazine; a step of moving a transport arm to transfer and hold the glass material pushed up on the glass material support portion of the transport arm; A step of transporting the glass material held by the support part into the main heating furnace via the transfer arm, and a step of transporting the glass material heated and softened in the step via the transfer arm to a forming point in the molding chamber. A method of transporting glass forming equipment, which comprises a step of