JPH072531A - Glass optical component press molding method and press molding apparatus - Google Patents

Abstract

PURPOSE:To provide the subject method so designed that the temperature difference between a top force and a glass matrix can be reduced and the mechanical impact by the top force on the glass matrix can also be reduced in clamping the matrix with both the top force and bottom force, thereby improving the working life of the top force significantly. CONSTITUTION:A top force 7 is slidably housed in a top force holder 1 and the specular surface 7a side is ensured to be retractable relative to the holder 1. The top force 7 is then brought into contact with the upper surface of a glass matrix 9 and the glass matrix 9 is put in a cavity formed by the respective specular surfaces 7a, 8a of the top force 7 and bottom force 8 followed by heating both the top force 7 and bottom force 8 to a specified temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for press-molding glass optical parts and a press-molding apparatus therefor, and more specifically,
The present invention relates to a glass optical component press-molding method and a press-molding apparatus capable of molding a glass optical component by heating and pressing a glass base material.

[0002]

2. Description of the Related Art Generally, a glass base material is inserted into a pressing die formed by a sleeve into which an upper die and a lower die are fitted,
It is known to form an optical lens by pressure molding under heating (see, for example, Japanese Patent Publication No. 4-46906). However, in the case where the upper mold and the lower mold are fitted in the sleeve in this way, the optical lens is separated from the upper mold and the lower mold by taking out the upper mold and the lower mold from the inside of the sleeve after molding the optical lens. However, since it is necessary to insert the glass base material into the sleeve together with the upper and lower molds again for the next production, it takes a very long time to mold the optical component, and the productivity is reduced. There is a problem that it becomes significantly worse.

Therefore, recently, they are arranged to face each other,
An upper mold and a lower mold each having a mirror surface, and an upper mold holder and a lower mold holder into which the upper mold and the lower mold are fitted and fixed and which are movable so as to contact and separate the upper mold and the lower mold are provided. Various molding apparatuses for glass optical components have been developed. This product is defined by the upper mold and the lower mold by placing the glass base material on the lower mold in advance, heating the upper mold and the lower mold to a predetermined temperature, and then contacting the upper mold with the lower mold. The base material is housed in the cavity, and the mirror surface is transferred to the base material by pressing the base material with the upper and lower molds in this state, then the upper mold is separated from the lower mold and the glass optical component is removed from the lower mold. When taken out from the glass, a glass optical component is formed.

For this reason, it is possible to shorten the production time of the molded product and to enable the production of a large number of products, which can greatly improve the productivity (for example, Japanese Patent Publication No. 3-80735 or Japanese Patent Publication No. 3-80735). (See Japanese Patent Publication No. 3-80736).

[0005]

However, in such a press molding apparatus for glass optical components, the upper mold and the lower mold are fitted and fixed in the upper mold holder and the lower mold holder. When the upper mold and the lower mold were clamped after the glass base material was placed on the lower mold, a mechanical shock was applied to the upper mold by the upper surface of the base material. Therefore, there is a problem that the upper die deteriorates earlier than the lower die, and the life of the upper die becomes shorter than that of the lower die.

In addition to this, since the upper die and the lower die are heated in advance and the upper die is brought into contact with the base material to store the base material in the cavity, the temperature of the mirror surface of the upper die and the glass upper surface is increased. The difference became large, and this point also became a factor that accelerates the deterioration of the upper mold compared to the lower mold. Therefore, the invention according to claim 1 provides a press molding apparatus in which at least the upper mold is configured to be slidable with respect to the upper mold holder, and the upper mold and the lower mold are set to a temperature lower than the glass transition point of the glass base material. After placing the glass base material on the mirror surface of the lower mold, the upper mold is brought into contact with the upper surface of the glass base material to store the base material in the cavity defined by the mirror surfaces of the upper mold and the lower mold. Then, by heating the upper mold and the lower mold to a predetermined temperature, it is possible to reduce the temperature difference between the upper mold and the glass base material, and at the time of clamping the upper mold and the lower mold with respect to the glass base material. An object of the present invention is to provide a glass optical component press molding method capable of reducing the mechanical impact of the mold and significantly improving the life of the upper mold.

According to a second aspect of the present invention, at least the upper die is slidably housed in the upper die holder, and the mirror surface side can be retracted from the upper die holder, so that the upper die and the lower die are clamped. It is an object of the present invention to provide a press molding apparatus for a glass optical component that can reduce the mechanical impact of the upper mold on the glass base material at times and can significantly improve the life of the upper mold.

According to a third aspect of the present invention, at least the coefficient of thermal expansion of the material forming the upper die holder is equal to or higher than the coefficient of thermal expansion of the material forming the upper die,
(EN) Provided is a glass optical component press-molding device capable of reliably sliding an upper mold with respect to an upper mold holder even when the temperature rises and preventing a decrease in the productivity of glass optical components. Is intended.

According to a fourth aspect of the present invention, at least the upper die holder and the upper die are made of a material obtained by processing ultrafine powder of tungsten carbide, tantalum carbide and titanium carbide by hot isostatic pressing. It is possible to prevent the glass base material from being welded to the upper mold and surely transfer the mirror surface of the upper mold to the glass base material, and the upper mold can be slid smoothly with respect to the upper mold holder,
Another object of the present invention is to provide a glass optical component press-molding apparatus capable of easily performing high-frequency heating by passing electricity easily.

According to a fifth aspect of the present invention, at least the upper mold is provided with a supply means for supplying air or nitrogen gas, and the supply means supplies air or nitrogen gas to the upper mold to direct the upper mold toward the lower mold side. Glass optical component that can reliably slide the upper mold with respect to the upper mold holder when the mold is opened and also can prevent the optical component from being pushed to the lower mold side and sticking to the upper mold. It is an object of the present invention to provide a press molding device of.

According to a sixth aspect of the present invention, a spring is provided at least between the upper mold and the upper mold holder, and the upper mold is pushed toward the lower mold by the spring, so that the upper mold is lifted when the mold is opened. An object of the present invention is to provide a press molding apparatus for glass optical components, which can be surely slid with respect to a mold holder, and which can prevent optical components from being pushed out to the lower mold side and attached to the upper mold. .

According to the seventh aspect of the present invention, by heating the upper mold and the lower mold by the induction heating means, the upper mold and the lower mold can be heated in a short time, and the productivity of the optical component is greatly improved. It is an object of the present invention to provide a press molding apparatus for glass optical parts that can be manufactured. In the invention according to claim 8, the upper mold and the lower mold are heated by the infrared heating means, so that the upper and lower molds having a large diameter can be easily heated, so that a large number of optical components can be easily obtained. In addition, it is an object of the present invention to provide a glass optical component press-molding apparatus capable of forming a large-diameter optical component easily.

According to a ninth aspect of the present invention, by heating the upper mold and the lower mold by the resistance heating means, the upper mold and the lower mold can be heated with a simple structure, and press molding of the glass optical component at low cost can be performed. The purpose is to provide a device.

[0014]

The invention according to claim 1 is
In order to solve the above-mentioned problems, a lower die holder for accommodating a lower die having a mirror surface and an upper die having a mirror surface are accommodated, and the upper die and the lower die are arranged so as to face each other so that the upper die and the lower die can be contacted and separated. An upper mold holder, and at least an upper mold is prepared so as to be slidable with respect to the upper mold holder, and a temperature lower than the glass transition point of the glass base material is used for the upper mold and the lower mold. In this state, the glass base material is placed on the mirror surface of the lower die, and then the upper die is brought into contact with the upper surface of the glass base material so that the mother material is placed in the cavity defined by the mirror surfaces of the upper die and the lower die. By storing the material and heating the upper mold and the lower mold to a predetermined temperature, and then bringing the upper mold holder and the lower mold holder into contact with each other, the glass base material is pressed by the upper mold and the lower mold, so that the glass Characterized by molding optical parts There.

In order to solve the above-mentioned problems, an invention according to a second aspect is such that at least one or more upper and lower dies which are arranged to face each other and have a mirror surface forming a cavity, and the upper and lower dies. Sides are housed respectively, and an upper die holder and a lower die holder that are movable so as to contact and separate the upper die and the lower die are provided, and the glass base material inserted into the cavity is heated and pressed by the upper die and the lower die. As a result, in a glass optical component press molding apparatus for molding a glass optical component, at least the upper mold is slidably housed in the upper mold holder, and the mirror surface side can be retracted from the upper mold holder. There is.

In order to solve the above-mentioned problems, the invention according to claim 3 is such that at least the coefficient of thermal expansion of the material forming the upper mold holder is equal to or higher than the coefficient of thermal expansion of the material forming the upper mold. Is characterized by. In order to solve the above-mentioned problems, the invention according to claim 4 is made of a material in which at least the upper die and the upper die are processed by subjecting tungsten carbide, tantalum carbide, and titanium carbide ultrafine powder to a hot isostatic pressing method. It is characterized by becoming.

In order to solve the above-mentioned problems, a fifth aspect of the present invention provides a supply means for supplying air or nitrogen gas to at least the upper mold, and supplies air or nitrogen gas to the upper mold by the supply means. Thus, it is characterized by having a pushing mechanism for pushing the upper die toward the lower die. In order to solve the above-mentioned problems, the invention according to claim 6 is characterized in that a spring is provided at least between the upper mold and the upper mold holder, and the upper mold is pushed out toward the lower mold by the spring. .

In order to solve the above-mentioned problems, the invention of claim 7 has an induction heating means, and the heating means heats the upper die and the lower die. In order to solve the above-mentioned problems, the invention according to claim 8 has an infrared heating means, and the heating means heats the upper mold and the lower mold. The invention according to claim 9 is
In order to solve the above problems, a resistance heating unit is provided, and the upper mold and the lower mold are heated by the heating unit.

[0019]

According to the first aspect of the present invention, there is provided a press molding apparatus in which at least the upper die is slidably arranged with respect to the upper die holder, and the upper die and the lower die have a temperature lower than the glass transition point of the glass base material. After the glass base material is placed on the mirror surface of the lower mold in the state of, the upper mold is brought into contact with the upper surface of the glass base material and placed in the cavity defined by the mirror surfaces of the upper mold and the lower mold. The base material is stored, and the upper mold and the lower mold are heated to a predetermined temperature.

Therefore, the temperature difference between the upper mold and the glass base material is reduced when the glass base material is heated. Further, at the time of clamping the upper die in contact with the glass base material, at least the upper die slides with respect to the upper die holder to reduce mechanical impact of the upper die on the glass base material. As a result, deterioration of the upper mold is suppressed, and the life of the upper mold is significantly improved. According to the second aspect of the present invention, at least the upper die is slidably housed in the upper die holder, and the mirror surface side of the upper die holder appears in and out of the upper die holder. Therefore, at the time of clamping the upper die in contact with the glass base material, at least the upper die slides with respect to the upper die holder to reduce mechanical impact of the upper die on the glass base material. As a result, deterioration of the upper mold is suppressed and the life of the upper mold is significantly improved.

In the third aspect of the invention, at least the coefficient of thermal expansion of the material forming the upper mold holder is equal to or higher than the coefficient of thermal expansion of the material forming the upper mold. Therefore, even when the temperature of the upper mold is increased, the upper mold is surely slid with respect to the upper mold holder, and the productivity of the glass optical component is not reduced. In the invention described in claim 4, at least the upper die holder and the upper die are made of a material obtained by processing ultrafine powder of tungsten carbide, tantalum carbide and titanium carbide by the hot isostatic pressing method.
Therefore, the glass base material is not welded to the upper mold,
While the mirror surface of the upper mold is reliably transferred to the glass base material,
The upper die slides smoothly with respect to the upper die holder. In addition, electricity is easily passed and high frequency heating is easily performed.

In a fifth aspect of the invention, at least the upper mold is provided with a supply means for supplying air or nitrogen gas, and the supply means supplies air or nitrogen gas to the upper mold so that the upper mold is on the lower mold side. It is designed to be pushed out. Therefore, the upper mold is surely slid with respect to the upper mold holder when the mold is opened, and the productivity is not reduced. Further, when the mold is opened, the optical component is not pushed out to the lower mold side and does not adhere to the upper mold, and the optical component is reliably taken out from the lower mold.

In the invention according to claim 6, a spring is interposed at least between the upper mold and the upper mold holder, and the upper mold is pushed out toward the lower mold by the spring. Therefore, the upper mold is surely slid with respect to the upper mold holder when the mold is opened, and the productivity is not reduced. Further, when the mold is opened, the optical component is not pushed out to the lower mold side and does not adhere to the upper mold, and the optical component is reliably taken out from the lower mold.

In the invention according to claim 7, the upper die and the lower die are heated by the induction heating means. Therefore, above
The lower mold is heated in a short time, and the productivity of optical parts is greatly improved. According to the invention of claim 8, the upper mold and the lower mold are heated by the infrared heating means. Therefore, the upper and lower molds having a large diameter can be easily heated, a large number of optical components can be easily obtained, and an optical component having a large diameter can be easily formed.

In the ninth aspect of the invention, the upper die and the lower die are heated by the resistance heating means. Therefore, the upper mold and the lower mold are heated with a simple structure, and the cost of the press molding apparatus is reduced.

[0026]

EXAMPLES The present invention will be described below based on examples.
1 and 2 are views showing an embodiment of a press molding apparatus for achieving the press molding method for a glass optical component according to the invention described in any of claims 1 to 4 and claims 7 to 9.

First, the structure will be described. In FIG. 1, 1
Is an upper die holder, 2 is a lower die holder, and both holders 1 and 2 are arranged to face each other and are separable from each other, a first upper member 3, a second upper member 4 and a first lower member 5,
It is composed of the second lower member 6. Top, mold holder 1,
2 has an upper mold 7 and a lower mold 8 housed therein, and the upper mold 7 and the lower mold 8 are mirror surfaces 7 facing each other.
a, 8a are formed, and the mirror surfaces 7a, 8a are formed at the time of mold clamping.
A cavity is defined in the space defined by a. The upper mold holder 1 is moved in the vertical direction by a moving device (not shown), and the upper mold 7 is brought into contact with and separated from the lower mold 8.

On the other hand, the second upper member 4 has a concave portion 4a and a through hole 4 penetrating from the concave portion 4a below the second upper member 4.
b is formed, the upper mold 7 is slidably accommodated in the recess 4a and the through hole 4b, and the mirror surface 7a is the second upper member 4
It is supposed to appear and disappear. The coefficient of thermal expansion of the material forming the upper mold holder 1 is equal to or higher than the coefficient of thermal expansion of the material forming the upper mold 7.

Further, a high-frequency power source (induction heating means) not shown is connected to the upper mold 7 and the lower mold 8, and high-frequency heating is performed by this high-frequency power source. In addition, in FIG. 1, 9 is a glass base material. Next, the operation will be described. To form a glass optical component from the glass base material 9, first, the upper mold 7 and the lower mold 8 are heated to a temperature 100 ° C. or more lower than the glass transition point of the glass base material. This temperature is a temperature that does not need to consider the reaction between the glass base material 9 and the upper mold 7 and the lower mold 8.

Then, as shown in FIG. 1, a mirror surface 8 of the lower mold 8 is formed.
The glass base material 9 is placed on a, and then the upper die holder 1 is moved downward to bring the upper die 7 into contact with the upper surface of the glass base material 9 as shown in FIG. The glass base material 9 is housed in the cavity defined by the mirror surfaces 7 a and 8 a of the mold 7 and the lower mold 8. At the time of this contact, the upper mold 7 slides upward with respect to the upper mold holder 1. Then, a high frequency is applied to the upper mold 7 and the lower mold 8 to heat them to a predetermined temperature, and when the temperature reaches the predetermined temperature, the residual heat is held at the temperature for a predetermined time.

Then, as shown in FIG. 2B, the upper die holder 1 is moved further downward to bring the upper die holder 1 into contact with the lower die holder 2. At this time, the upper die 7 slides into the upper die holder 1 so that the mirror surface 7a is retracted into the upper die holder 1 and the upper portion abuts the first upper member 3, so that the upper die 7 and the lower die 8 are used to make the glass. The base material 9 is pressurized. After pressurizing for a predetermined time, after cooling the upper and lower holders 1, when the upper die holder 1 is moved upward, a glass optical component having the mirror surfaces 7a and 8a transferred thereon is molded. 8 Remove from above and perform the next molding operation.

As described above, in this embodiment, since the upper die 7 is slidably accommodated in the upper die holder 1 and the mirror surface 7a side is projected and retracted with respect to the upper die holder 1, the upper die 7
It is possible to reduce the mechanical impact of the upper mold 7 on the glass base material 9 by accommodating the upper mold 7 in the upper mold holder 1 at the time of clamping the mold in contact with the glass base material 9. In addition to this, after placing the glass base material 9 on the mirror surface 8a of the lower mold 8 while keeping the upper mold 7 and the lower mold 8 at a temperature lower than the glass transition point of the glass base material 9, 7 is brought into contact with the upper surface of the glass base material 9 and the base material 9 is housed in the cavity defined by the mirror surfaces 7a, 8a of the upper mold 7 and the lower mold 8, and the upper mold 7 and the lower mold 8 are predetermined. Since it is heated to the temperature, it is possible to reduce the temperature difference between the upper mold 7 and the glass base material 9, and
The temperature gradient in the glass base material 9 can also be lowered. As a result, deterioration of the upper mold 7 can be suppressed and the life of the upper mold 7 can be significantly improved.

Further, since the coefficient of thermal expansion of the material forming the upper mold holder 1 is equal to or higher than the coefficient of thermal expansion of the material forming the upper mold 7, the upper mold 7 can be maintained even when the temperature rises. The upper mold holder 1 can be surely slid, and the productivity of the glass optical component can be prevented from being lowered. Further, since the upper mold 7 and the lower mold 8 are heated at high frequency by the high frequency power source, the upper mold 7 and the lower mold 8 can be heated in a short time, and the productivity of optical parts can be greatly improved. .

In this embodiment, the upper die 7 is slid with respect to the upper die holder 1, but the present invention is not limited to this, and the same is true even if the lower die 8 is slid with respect to the lower die holder 2. The effect can be obtained. Further, in this embodiment, the upper and lower molds 7 and 8 are heated by the high frequency power source, but not limited to this, heating means such as an infrared lamp is provided near the upper and lower mold holders 1 and 2, and the ultraviolet lamp You may make it heat by. In this way, the large diameter, that is,
In addition to having a large mirror surface, the lower molds 7 and 8 can be easily heated, a large number of optical components can be easily obtained, and large-diameter optical components can be easily formed.

Besides, resistance heating means such as coils may be arranged around the upper and lower die holders 1 and 2. With this configuration, the upper and lower molds 7 and 8 can be simply structured.
Can be heated, and the cost of the press molding apparatus can be reduced. Also, the upper die holder 1 and the upper die 7
May be made of a material obtained by processing ultrafine powder of tungsten carbide, tantalum carbide and titanium carbide by a hot isostatic pressing method. By doing so, it is possible to prevent the glass base material 9 from being welded to the upper mold 7 and to reliably transfer the mirror surface 7a of the upper mold 7 to the glass base material 9, and to transfer the upper mold 7 to the upper mold holder 1 On the other hand, it can be smoothly slid, and high-frequency heating can be easily performed by easily passing electricity.

FIGS. 3 and 4 are views showing an embodiment of a press-molding apparatus for achieving the press-molding method for a glass optical component according to the invention described in claims 5 and 6, respectively. Figure 3
In, 11 is an upper die holder, which is the first
The upper member 12 and the second upper member 13 are separable.
Two upper molds 14 and 15 are slidably accommodated in the first upper member 12, and the upper molds 14 and 15 are arranged to face two lower molds (not shown).

The first upper member 12 has a supply hole as a supply means.
12a is formed. One end of this supply hole 12a communicates with an air source or a nitrogen gas source (not shown), and the other branched ends open to the upper side of the upper molds 14 and 15, respectively. . In this embodiment, by introducing dry air or nitrogen gas into the upper molds 14, 15 from the air source or the nitrogen gas source through the supply holes 12a when the molds are opened, the upper molds 14, 15
The upper mold by forcibly pushing it toward the lower mold.
It is possible to obtain an effect that the 14 and 15 can be surely slid with respect to the upper mold holder 11 and that the optical component can be pushed out to the lower mold side and prevented from adhering to the upper mold.

Comparing this effect with the first embodiment, the first
In the pressing apparatus of the embodiment, when the glass base material 9 is pressed, the upper die 7 is immersed in the second upper member 4 so that the base material enters the second upper member 4, and the upper die 7 is moved downward when the die is opened. May not go down. On the other hand, in this embodiment, since the upper molds 14 and 15 can be forcibly pushed out by the dry air or the nitrogen gas when the molds are opened, the upper molds 14 and 15 can be surely slid and the robot It is possible to prevent the optical component from being pushed out to the lower mold side and adhering to the upper mold in the case of taking out.

Although air or nitrogen gas is used for extrusion in this embodiment, a spring 21 is interposed between the upper molds 14 and 15 and the first upper member 12 as shown in FIG. The same effect can be obtained by pushing the upper molds 14 and 15 toward the lower mold by the spring 21.

[0040]

According to the invention of claim 1, the temperature difference between the upper mold and the glass base material can be reduced, and at the time of clamping the upper mold and the lower mold, the upper mold with respect to the glass base material is removed. Mechanical shock can be reduced, and the life of the upper mold can be significantly improved.

According to the second aspect of the present invention, it is possible to reduce the mechanical impact of the upper die on the glass base material when the upper die and the lower die are clamped, and the life of the upper die is greatly improved. be able to. According to the third aspect of the invention, the upper mold can be surely slid with respect to the upper mold holder even when the temperature rises, and it is possible to prevent the productivity of the glass optical component from being lowered. .

According to the fourth aspect of the present invention, it is possible to prevent the glass base material from being welded to the upper mold, to reliably transfer the mirror surface of the upper mold to the glass base material, and also to transfer the upper mold to the upper mold. The holder can be smoothly slid with respect to the holder, and high-frequency heating can be easily performed by easily passing electricity. According to the invention described in claims 5 and 6,
It is possible to surely slide the upper mold with respect to the upper mold holder when the mold is opened, and it is possible to prevent the optical component from being pushed out to the lower mold side and being attached to the upper mold.

According to the invention described in claim 7, the upper and lower molds can be heated in a short time, and the productivity of the optical component can be greatly improved. According to the invention described in claim 8, by easily heating the upper and lower molds having a large diameter, it is possible to easily obtain a large number of optical components and easily form the large-diameter optical components. can do.

According to the ninth aspect of the invention, the upper mold and the lower mold can be heated with a simple structure, and the cost of the glass optical component can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a press molding apparatus for achieving a press molding method for a glass optical component according to any one of claims 1 to 4 and claims 7 to 9.

FIG. 2A is a diagram showing a state in which an upper die is brought into contact with an upper surface of a glass base material to heat the glass base material, and FIG. 2B is a view showing a state in which the glass base material is pressurized.

FIG. 3 is a sectional view showing an embodiment of a press molding apparatus for achieving the method for press molding a glass optical component according to the invention of claim 5.

FIG. 4 is a sectional view showing an embodiment of a press molding apparatus for achieving the method for press molding a glass optical component according to the invention as defined in claim 6;

[Explanation of symbols]

 1, 11 Upper mold holder 2 Lower mold holder 7, 14, 15 Upper mold 7a Mirror surface 8 Lower mold 8a Mirror surface 9 Glass base material 12a Supply hole (supply means) 21 Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ueno 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Akito Minato 1-3-6 Nakamagome, Ota-ku, Tokyo In Ricoh Co., Ltd. (72) Inventor Hiroyuki Endo 1-3-6 Nakamagome, Ota-ku, Tokyo In Ricoh Co., Ltd.

Claims (9)

[Claims] 1. A lower die holder for accommodating a lower die having a mirror surface, and an upper die for accommodating an upper die having a mirror surface, the upper die being opposed to the lower die holder so that the upper die and the lower die can be contacted and separated from each other. A press molding apparatus having a mold holder and at least an upper mold slidably configured with respect to the upper mold holder, and a temperature lower than the glass transition point of the glass base material for the upper mold and the lower mold. Then, the glass base material is placed on the mirror surface of the lower die, and then the upper die is brought into contact with the upper surface of the glass base material to store the base material in the cavity defined by the mirror surfaces of the upper die and the lower die. Then, the upper mold and the lower mold are heated to a predetermined temperature, and then, the upper mold holder and the lower mold holder are brought into contact with each other to press the glass base material with the upper mold and the lower mold, whereby the glass optical component is formed. Glass light characterized by molding Press molding method of the parts. 2. At least one or more upper mold and lower mold having mirror surfaces forming a cavity and facing each other and accommodating the upper mold and lower mold, respectively, and contacting the upper mold and lower mold. It is equipped with an upper mold holder and a lower mold holder that can be moved away from each other, and presses the glass base material inserted into the cavity by heating and pressing the glass base material with the upper mold and the lower mold to mold the glass optical component. In the molding device, at least the upper mold is slidably housed in the upper mold holder,
A press-molding device for glass optical parts, characterized in that the mirror surface side can be retracted from the upper mold holder. 3. The press for glass optical parts according to claim 2, wherein at least the coefficient of thermal expansion of the material forming the upper mold holder is equal to or higher than the coefficient of thermal expansion of the material forming the upper mold. Molding equipment. 4. The at least upper die and the upper die are made of a material obtained by processing ultrafine powder of tungsten carbide, tantalum carbide and titanium carbide by a hot isostatic pressing method. Press molding equipment for glass optical parts. 5. An extruding mechanism for pushing out the upper mold toward the lower mold by supplying at least the upper mold with air or nitrogen gas, and supplying the upper mold with air or nitrogen gas. The press molding apparatus for glass optical components according to any one of claims 2 to 4, further comprising: 6. The glass according to claim 2, wherein a spring is provided at least between the upper mold and the upper mold holder, and the upper mold is pushed out toward the lower mold by the spring. Press molding equipment for optical parts. 7. An induction heating means is provided, and the upper die and the lower die are heated by the heating means.
6. The press molding apparatus for glass optical components according to any one of 6 above. 8. An infrared heating means is provided, and the upper die and the lower die are heated by the heating means.
A press molding apparatus for glass optical components according to any one of to 6. 9. The method according to claim 2, further comprising resistance heating means for heating the upper die and the lower die by the heating means.
6. The press molding apparatus for glass optical components according to any one of 6 above.