JP2010018501A - Releasing agent adhering device, method for producing glass gob and method for molding glass product using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new and improved releasing agent adhering device by which a releasing agent can be adhered on a glass gob in a step to form the glass gob being a molding material for a glass product. <P>SOLUTION: The releasing agent adhering device includes a releasing agent adhering chamber having an introduction port openable or closable by an introduction port shutter, a holder for adhering the releasing agent which is housed in the releasing agent adhering chamber and which has a gas ejecting hole, an inert gas supplying portion to hold glass introduced through the introduction port at a floating state from the holder for adhering the releasing agent and a releasing agent supplying portion to adhere the releasing agent on the glass at the floating state from the holder for adhering the releasing agent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a release agent adhering device, a method for producing a glass lump using the same, and a method for molding a glass molded product.

  Conventionally, as a method of generating an optical glass element by press molding, for example, a technique called reheat press or direct press is known. Here, with the reheat press method, first, the molten glass is dropped from the orifice onto the holder, and the molten glass is floated and supported by ejecting gas from the bottom of the recess provided in the holder or the porous member. By doing so, a glass lump is formed. Moreover, after pouring glass out of a melting furnace and making it into a glass block, it may be cut out to a desired size or shape to form a preform. In any case, the glass lump (preform) is a method of once cooling to room temperature and then heating the glass lump again to produce a desired glass molded product with a press molding machine. On the other hand, the direct press method is a method in which a glass lump formed in a melting furnace is directly transferred to a press molding machine while maintaining a temperature higher than a predetermined temperature at which press molding is possible, and a desired glass molded product is generated. . The direct press method is disclosed in, for example, Patent Documents 1 and 2.

  Moreover, when producing | generating a glass molded product by press molding, since a glass lump is a high-temperature state more than a yield point (At), it is necessary to prevent fusion | melting with a shaping | molding die and glass. In press molding of a glass molded product, the mold and the glass may be prevented from being fused by attaching a release agent to the mold and the glass block in advance. For example, Patent Document 3 discloses a technique of attaching a powder release agent to a glass lump that has been cooled to room temperature and whose surface has been roughened in the production of a glass molded product by a reheat press method. In addition, a technique for forming a release agent layer on the surface of a glass block by evaporating a release agent using a vapor deposition apparatus is also known.

JP-A-6-340430 JP-A-9-12317 Japanese Patent Laid-Open No. 2001-19446

  However, in the direct press method, since the produced glass lump is directly transferred to a press molding machine without being cooled to room temperature and press-molded, there is a problem that a release agent cannot be attached to the glass lump. Also, the reheat press method has a problem that a separate process / equipment for attaching a release agent is required after the glass lump once generated is cooled.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to attach a release agent to the glass block in the process of forming the glass block which is a molding material of the glass molded product. It is an object of the present invention to provide a new and improved release agent adhering apparatus, a method for producing a glass lump using the same, and a method for molding a glass molded product.

  In order to solve the above problems, according to an aspect of the present invention, a release agent adhesion chamber having an introduction port that can be opened and closed by an introduction port shutter, and a gas ejection hole provided in the release agent adhesion chamber. A mold release agent attaching holder, and a glass introduced through the introduction port by supplying an inert gas to the gas ejection hole of the mold release agent attaching holder. An inert gas supply unit that is held in a state of being floated from the holder, and the glass in a state of being floated from the release agent attachment holder by supplying a release agent into the release agent attachment chamber And a release agent supply unit for attaching the release agent to the release agent attachment device.

  According to the said structure, the inert gas supply part can eject an inert gas upwards from the ejection hole with which the mold release agent adhesion holder is equipped. With the inert gas ejected in this manner, the release agent attaching device can hold the glass introduced from the introduction port in a state of being floated from the release agent attaching holder. Further, the release agent supply unit supplies the release agent into the release agent attachment chamber, so that the release agent can be attached to the glass floating from the release agent attachment holder.

  Further, the glass introduced through the introduction port may be a molten glass dripped from a melting furnace, and the inert gas supply unit is configured such that the gas ejection hole of the release agent adhesion holder By supplying an inert gas to the molten glass, the molten glass is cooled in a state of being floated from the release agent adhesion holder to form a glass lump, and the release agent supply unit is By supplying a release agent into the attachment chamber, the release agent can be attached to the glass block formed in a state of floating from the release agent attachment holder.

  The mold release agent attaching apparatus may further include a temperature control chamber for forming a glass lump from molten glass dropped from a melting furnace. In this case, the temperature control chamber is located above the release agent adhesion chamber, a dropping port that is an opening for introducing the molten glass into the temperature control chamber, and a dropping port that opens and closes the dropping port. A forming holder having a shutter and having a gas ejection hole in the temperature control chamber and configured to form a dropping path for dropping the glass lump can be provided. The inert gas supply unit supplies an inert gas to the gas ejection holes of the forming holder, thereby cooling the molten glass in a state of floating from the forming holder to form a glass lump. be able to. The forming holder may introduce the glass lump into the release agent adhesion chamber through the introduction port by dropping the formed glass lump from a dropping path of the forming holder. it can.

  The release agent adhesion holder is configured to be able to form a drop path for dropping the glass lump, and the release agent adhesion chamber falls from the fall path of the release agent adhesion holder. An extraction outlet for extracting the glass block from the release agent adhering chamber and an extraction shutter for opening and closing the extraction opening may be further provided.

  Moreover, the said mold release agent adhesion apparatus can also be equipped with the holder which receives and hold | maintains the glass lump to which the said mold release agent falling from the said extraction opening was adhered.

  Moreover, the said receiver can also be used as the lower mold | type for press-molding the glass lump to which the said mold release agent was adhered.

  The release agent attaching device may further include a transfer device for moving the lower die to a position facing the upper die for press-molding the glass lump to which the release agent is attached. .

  The release agent adhering device may further include an inert gas chamber maintained in an inert gas atmosphere, and the upper mold and the lower mold may be provided in the inert gas chamber.

  Further, the release agent supplying section attaches the release agent to the glass block in a state where the temperature of the glass block in the state of rising from the release agent attaching holder is equal to or higher than the glass transition point (Tg). You can also.

  The mold release agent may be a powder mold release agent mainly composed of at least carbon or boron nitride.

  The average particle size of the powder release agent may be 50 μm or less.

  In order to solve the above problems, according to another aspect of the present invention, there is provided a method for producing a glass lump supplied as a raw material for forming a glass molded article, wherein the glass melted from a melting furnace is A molten glass dropping step for dropping in a release agent adhesion holder having a gas ejection hole, which is installed in a release agent adhesion chamber maintained in an active gas atmosphere, and injecting an inert gas into the gas ejection hole A glass lump forming step of forming the glass lump in a state where the molten glass is levitated from the release agent attaching holder, and the temperature of the glass lump formed in the state of being levitated from the holder is A glass lump including a release agent attaching step of attaching a release agent to the glass lump by supplying a release agent into the release agent adhesion chamber in a state of a glass transition point (Tg) or higher. How to make There is provided.

  Moreover, in order to solve the above-mentioned problem, according to another aspect of the present invention, there is provided a method for producing a glass lump supplied as a raw material for molding a glass molded article, wherein glass melted from a melting furnace is obtained. A molten glass dropping step for dropping into a forming holder that is installed in a temperature control chamber maintained in an inert gas atmosphere, has a gas ejection hole, and is configured to form a dropping path for dropping the glass lump. And a glass lump forming step of forming a glass lump in a state where the molten glass is floated from the forming holder by ejecting an inert gas into a gas ejection hole of the forming holder, and the formation A dropping step for dropping the formed glass lump into a release agent adhesion holder installed in a release agent adhesion chamber and having a gas ejection hole via a fall path of the formation holder; For agent adhesion By injecting an inert gas into the gas ejection hole of the holding tool, the glass lump is held in a state of being floated from the release agent adhesion holder, and the release agent is supplied into the release agent adhesion chamber. Thus, there is provided a method for producing a glass lump, including a release agent attaching step of attaching the release agent to the glass lump in a state where the temperature of the glass lump is equal to or higher than a glass transition point (Tg). .

  In order to solve the above-mentioned problem, according to another aspect of the present invention, after a release agent is attached to a glass lump supplied as a material for molding a glass molded product, glass molding is performed by press molding. A glass molding product molding method for molding a product, wherein the glass melted from a melting furnace is installed in a temperature control chamber maintained in an inert gas atmosphere, and has a gas ejection hole, the glass mass A molten glass dropping step for dropping onto a forming holder configured to be capable of forming a dropping path for dropping, and by injecting an inert gas into a gas ejection hole of the forming holder, the molten glass is A glass lump forming step for forming a glass lump in a state of floating from the forming holder, and the formed glass lump is installed in a release agent adhesion chamber via a dropping path of the forming holder. , A dropping step for dropping onto a release agent adhering holder configured to form a drop path for dropping the glass lump, and an inert gas outlet hole of the release agent adhering holder By blowing out the gas, the glass lump is held in a state of being floated from the release agent adhesion holder, and the mold release agent is supplied into the release agent adhesion chamber, whereby the temperature of the glass lump is increased. A release agent adhering step for adhering the release agent to the glass lump in a state where the glass transition point (Tg) is equal to or higher than the glass transition point, and the release agent adhering holder. The glass lump is removed from the release agent adhesion chamber through the dropping path of the glass mold and dropped into the lower mold for press molding, which is installed below the release agent adhesion chamber, and dropped into the lower mold A glass lump with a release agent attached Method of molding a molded glass article comprising, a press molding step for molding a desired molded glass article by shaping are provided.

  As described above, according to the present invention, in the process of forming a glass lump which is a molding material for producing a glass molded product, a new and improved release agent can be attached to the glass lump. A mold release agent attaching apparatus, a method for producing a glass lump using the same, and a method for molding a glass molded product can be provided.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(First embodiment)
(Configuration of release agent adhesion apparatus 100)
First, the mold release agent adhesion apparatus 100 which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 1 is an explanatory view showing a configuration of a release agent adhering apparatus 100 according to the first embodiment and its surroundings.

  As shown in FIG. 1, the release agent attaching device 100 mainly includes a release agent attachment chamber 118, an inlet shutter 106, an outlet shutter 114, a release agent attachment holder 112, and a release agent. The supply part 124, the 1st inert gas supply part 120, and the receiving tool 132 are comprised. Further, a melting furnace 10 for dropping molten glass onto the release agent attaching device 100 is disposed above the release agent attaching device 100.

  The melting furnace 10 is for dripping hot molten glass through the orifice 12. Molten glass is dropped from the orifice 12 at predetermined timings and dropped into the release agent deposition chamber 118.

  The release agent adhesion chamber 118 is a chamber for attaching the release agent to the glass lump 130 that is a molding material of the glass molded product. In the present embodiment, the molten glass is dropped from the melting furnace 10. A glass lump 130 is formed in the chamber. As shown in FIG. 1, an inlet 105 serving as an inlet for dropping molten glass from the melting furnace 10 is provided above the release agent adhesion chamber 118. The release agent adhesion chamber 118 includes an inlet shutter 106 that opens and closes the inlet 105. Further, below the release agent adhesion chamber 118, there is provided an extraction port 113 that serves as an outlet for extracting the generated glass lump 130 from the release agent adhesion chamber 118. The release agent adhesion chamber 118 includes an extraction shutter 114 that opens and closes the extraction port 113.

  The release agent adhering holder 112 is a holder that holds the molten glass dropped from the melting furnace 10 in order to form a glass lump 130 that is a molding material of the glass molded product. In addition, the example in case the mold release agent adhesion holder 112 is provided with the concave surface corresponding to the shape of the glass lump 130 is demonstrated. The concave surface is provided with a plurality of gas ejection holes 128, and the inert gas is ejected from the gas ejection holes 128 by the first inert gas supply unit 120. In addition, the ejection hole 128 shown in FIG. 1 is a conceptual diagram for explaining the present embodiment, and is not limited to this. That is, a plurality of ejection holes 128 are formed in the concave surface of the release agent attaching holder 112. Further, the release agent adhering holder 112 may be a cylindrical shape having a flat bottom surface, or a gas jetting gas from a funnel-shaped bottom hole, in which gas is ejected from near the bottom surface.

  Further, the release agent attaching holder 112 is provided in the release agent attaching chamber 118 and is positioned so that the molten glass is dropped on the concave surface. Note that the release agent attaching holder 112 may be configured to rise to a position close to the dropping port of the melting furnace 10 when receiving the molten glass dropped from the melting furnace 10. It is received before the dropping speed of the molten glass increases by shortening the dropping distance, and the molten glass adheres to the receiving surface of the release agent attaching holder 112, or the glass is scattered or deformed by an impact. Can be prevented. Although not described individually in the following description of the embodiment, when receiving a falling molten glass or glass lump, adhesion to the receiving surface, deformation, scattering, etc. by raising the receiving tool and shortening the falling distance Can be avoided.

  Further, the release agent adhering holder 112 can be configured to be separable. In the example shown in FIG. 1, the release agent attachment holder 112 includes a first divided holding unit 108 and a second divided holding unit 110. In this case, for example, the first divided holding unit 108 and the second divided holding unit 110 are divided in the horizontal direction to form a dropping path for dropping the glass lump 130, and the glass lump formed on the concave surface. 130 can be naturally dropped. Details of the step of dropping the glass lump 130 by dividing the release agent attaching holder 112 will be described later. Note that the release agent attaching holder 112 shown in FIG. 1 is an example for explaining the present embodiment, and the present invention is not limited to this. For example, it is naturally possible to have a split holding portion and a concave surface having a shape different from the example shown in FIG.

The first inert gas supply unit 120 supplies an inert gas such as nitrogen (N ₂ ) to the release agent adhesion chamber 118. The first inert gas supply unit 120 may be configured to include, for example, an inert gas tank, a supply valve, a control device, and the like. As shown in FIG. 1, the first inert gas supply unit 120 supplies an inert gas to the plurality of gas ejection holes 128 formed in the release agent attachment holder 112, thereby releasing the release agent attachment holder. An inert gas is ejected upward from the concave surface of 112. Moreover, the 1st inert gas supply part 120 can also adjust the quantity of the inert gas supplied to the ejection hole 128 by a control apparatus, a supply valve, etc., or can also stop supply. Further, as shown in FIG. 1, a heater 134 may be provided around the pipe line from the first inert gas supply unit 120 to the release agent adhesion chamber 118. By heating the inert gas supplied to the release agent adhering chamber 118 by the heater 134, the temperature of the glass lump 130 can be adjusted by preventing a rapid temperature drop of the glass lump 130 due to the inert gas. .

  The release agent supply unit 124 supplies the release agent to the release agent attachment chamber 118 and attaches the release agent to the glass lump 130. The release agent supply unit 124 can include, for example, a release agent tank, a supply valve, a control device, and the like. As the mold release agent, for example, a powder mold release agent containing carbon, boron nitride (BN) or the like as a main component can be used, but is not limited thereto. Moreover, these powder mold release agents are so preferable that a particle size is small, and it is desirable that an average particle diameter is 50 micrometers or less. As shown in FIG. 1, the release agent supply unit 124 mixes the release agent into the inert gas supplied by the first inert gas supply unit 120 and ejects the release agent from the ejection holes 128. Moreover, the release agent supply part 124 can also adjust the quantity of the release agent supplied to the ejection hole 128 by a control apparatus, a supply valve, etc., or can also stop supply.

  In FIG. 1, the release agent supply unit 124 mixes the release agent into the inert gas ejected from the ejection holes 128, but is not limited thereto. For example, only the inert gas from the first inert gas supply unit 120 is ejected from the ejection hole 128, and a release agent separately mixed with the inert gas from a predetermined position other than the ejection hole 128 is used as the release agent. It is also possible to supply the deposition chamber 118.

  The receiving tool 132 receives and holds the glass lump 130 dropped from the release agent adhesion chamber 118 through the extraction port 113. The receiver 132 is disposed on a transfer means (not shown) such as a base plate or a conveyor, for example, and is continuously formed in the mold release agent attaching device 118 by moving the transfer means. The mass 130 can also be received. The receiving device 132 can also be provided in a chamber (not shown) maintained in an inert gas atmosphere. In this case, it is preferable to heat the receiving tool 132 in advance to a temperature close to that at the time of molding. Thereby, the glass lump 130 can be transferred to the molding position while maintaining a high temperature.

(Step of attaching release agent)
Next, in the mold release agent adhering apparatus 100 of the first embodiment configured as described above, a process of attaching the mold release agent to the glass lump 130 will be described below with reference to FIGS.

  As shown in FIG. 2, the molten glass dropped from the orifice 12 is dropped into the release agent adhesion chamber 118 through the inlet 105. At this time, the molten glass dropped from the orifice 12 can be dropped into the release agent adhesion chamber 118 by opening the inlet 105 with the inlet shutter 106. Note that the inside of the release agent adhesion chamber 118 is maintained in an inert gas atmosphere by the inert gas supplied by the first inert gas supply unit 120. When the molten glass is dropped into the release agent adhesion chamber 118, the inlet 105 is closed by the inlet shutter 106. Thereby, the entry of air (oxygen) into the release agent adhesion chamber 118 can be prevented.

  Thereafter, the dropped molten glass falls toward the concave surface of the release agent attaching holder 112. As described above, the concave surface is provided with a plurality of gas ejection holes 128, and the inert gas supplied from the first inert gas supply unit 120 is ejected upward via the ejection holes 128. ing. Therefore, as shown in FIG. 3, the dropped molten glass is held in a state of floating from the concave surface by the jetted inert gas. Thereafter, the molten glass is cooled to some extent by the inert gas ejected from the ejection holes 128 while being floated from the concave surface, so that a glass lump 130 having a predetermined shape is formed. In addition, since the formed glass lump 130 does not directly contact the inner surface of the release agent attaching holder 112, the shape of the inner surface of the release agent attaching holder 112 is not transferred. It is possible to arbitrarily change the shape of the inner surface of the release agent attaching holder 112 so as to obtain a glass lump 130 having a shape.

  Thereafter, the release agent supply device 124 attaches the release agent to the glass block 130 formed on the release agent attachment holder 112. Here, the release agent supply device 124 ejects the release agent through the gas ejection holes 128 when the temperature of the glass block 130 is equal to or higher than the glass transition point (Tg). Note that the glass transition point (Tg) refers to a temperature at which the property changes greatly when the glass transitions from the supercooled state. In the present embodiment, the glass transition point (Tg) is appropriately changed depending on the type of molten glass to be used.

  For example, the release agent supply unit 124 may include a glass lump based on the temperature in the release agent adhesion chamber 118, the time after the molten glass is dropped into the release agent adhesion chamber 118, the gas flow rate, the gas temperature, and the like. The temperature of 130 can be judged and the supply of the release agent can be started. As a result, the release agent mixed with the inert gas is ejected from the gas ejection holes 128, and the glass lump 130 formed floating on the concave surface is released in a high temperature state above the glass transition point (Tg). The agent will be attached. As a result, the release agent attaching device 100 according to the first embodiment can attach the release agent to the glass lump 130 at the stage of generating the glass lump 130. That is, unlike the prior art, it is not necessary to separately provide a release agent attaching device / process after the formed glass block is cooled to room temperature. Moreover, since the release agent is ejected at a high temperature above the glass transition point (Tg), the adhesion of the release agent to the glass lump 130 is improved as compared with the case where the release agent is attached at room temperature. be able to.

  The glass block 130 to which the release agent is attached in this way is then extracted from the release agent attachment chamber 118. For example, as shown in FIG. 4, the release agent attaching device 100 stops the supply of the inert gas and the release agent by the first inert gas supply unit 120 and the release agent supply unit 124, and attaches the release agent. The holder 112 is divided in the horizontal direction, and the extraction port 113 is opened by the extraction shutter 114. As a result, as shown in FIG. 4, the glass lump 130 to which the release agent is attached falls toward the receiving tool 132, and the dropped glass lump 130 is held by the receiving tool 132.

  As described above, in the release agent attaching device 100 according to the first embodiment, the release agent supply unit 124 supplies the release agent into the release agent attachment chamber 118, so that the glass block 130 is released. An agent can be attached. Therefore, the mold release agent adhering apparatus 100 according to the first embodiment does not cool the glass mass 130 to a temperature lower than the glass transition point (Tg) in the process of generating the glass mass 130 of the molding material. Can be attached to the glass block 130.

(Second Embodiment)
Next, the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment is demonstrated below. In the release agent attaching apparatus 100 according to the first embodiment, the release agent is provided in the release agent attaching chamber 118 in the process of forming the glass block 130. In addition, when the next molten glass is dropped, air may be mixed in the release agent adhesion chamber 118. Therefore, for example, when carbon is used as a mold release agent, in order to ensure safety, the mold release agent adhesion chamber 118 is evacuated every time one glass block 130 is formed to release the mold release agent. In some cases, it may be necessary to exhaust the gas and make it an inert gas atmosphere again. In this case, problems such as a reduction in production efficiency of equipment such as a vacuum pump and the glass lump 130 occur. The mold release agent adhesion apparatus 200 according to the second embodiment solves this problem.

(Configuration of release agent adhesion apparatus 200)
FIG. 5 is an explanatory diagram showing the configuration of the release agent adhering apparatus 200 according to the second embodiment and its surroundings. As shown in FIG. 5, the release agent attaching device 200 includes a temperature control chamber 202, a forming holder 216, a first member, in addition to the elements constituting the release agent attaching device 100 according to the first embodiment. 2 mainly includes an inert gas supply unit 238. Hereinafter, the configuration in the temperature control chamber 202 which is a characteristic part of the present embodiment will be mainly described, and the configuration in the release agent adhesion chamber 118 which is the same configuration as that in the first embodiment will be omitted.

  The temperature adjustment chamber 202 is a chamber for forming a glass lump 130 that is a molding material of a glass molded product. In the present embodiment, glass melted from the melting furnace 10 is dropped, and the glass lump is formed in the chamber. 130 is formed. As shown in FIG. 5, the temperature adjustment chamber 202 is located above the release agent deposition chamber 118. A dripping port 207 serving as an inlet for dripping molten glass from the melting furnace 10 is provided above the temperature control chamber 202 as shown in FIG. The temperature control chamber 202 includes a dripping port shutter 206 that opens and closes the dripping port 207.

  The forming holder 216 is a holder that holds the molten glass dropped from the melting furnace 10 in order to form the glass lump 130 that is a forming material of the glass molded product. The forming holder 216 has a concave surface so as to correspond to the shape of the glass lump 130. Further, the concave surface is provided with a plurality of gas ejection holes 232, and the inert gas is ejected from the gas ejection holes 232 by the second inert gas supply unit 238.

  In addition, the ejection hole 232 shown in FIG. 5 is a conceptual diagram for explaining the present embodiment, and is not limited to this. That is, a plurality of ejection holes 232 are formed on the concave surface of the forming holder 216. Further, the forming holder 216 may be a cylinder having a flat bottom surface or a gas jetting gas from a funnel-shaped bottom hole so that gas is jetted from near the bottom surface. Further, the forming holder 216 can be constituted by a plurality of divided holding parts so as to be divided like the release agent attaching holder 118.

  The forming holder 216 is provided in the temperature control chamber 202 and is positioned so that the molten glass is dropped onto the concave surface.

The second inert gas supply unit 238 supplies an inert gas such as nitrogen (N ₂ ) to the temperature adjustment chamber 216. Similarly to the first inert gas supply unit 120 according to the first embodiment, the second inert gas supply unit 238 can include, for example, an inert gas tank, a supply valve, a control device, and the like. Further, as shown in FIG. 5, the second inert gas supply unit 238 supplies an inert gas to the plurality of gas ejection holes 232 formed in the forming holder 216, and from the concave surface of the forming holder 216. An inert gas is spouted upward. In addition, the second inert gas supply unit 238 can adjust the amount of inert gas supplied to the ejection holes 232 by using a control device, a supply valve, or the like, or can stop the supply. In the present embodiment, an example in which a second inert gas supply unit 238 that supplies an inert gas to the temperature adjustment chamber 216 is separately described will be described. For example, the inert gas is supplied from the first inert gas supply unit 120. Can be supplied to the temperature control chamber 216. In this case, the second inert gas supply unit 238 supplies the inert gas supplied to the ejection holes 128 of the release agent adhesion chamber 118 and the ejection holes 232 of the temperature adjustment chamber 216 by, for example, a control device and a supply valve. The amount of gas to be adjusted can be adjusted, or the supply to either or both can be stopped.

(Step of attaching release agent)
Next, the operation of attaching the release agent to the glass lump 130 in the release agent attaching apparatus 200 according to the second embodiment configured as described above will be described below.

  Similar to the first embodiment described above, the molten glass dropped from the orifice 12 is dropped into the temperature control chamber 202 through the dropping port 207. At this time, the molten glass dropped from the orifice 12 can be dropped into the temperature control chamber 202 by opening the dropping port 207 with the dropping port shutter 206. Note that the inside of the temperature control chamber 202 is maintained in an inert gas atmosphere by the inert gas supplied from the second inert gas supply unit 238. When molten glass is dropped into the temperature control chamber 202, the dropping port 207 is closed by the dropping port shutter 206. Thereby, the entry of air (oxygen) into the temperature control chamber 202 can be prevented.

  Thereafter, the dropped molten glass falls toward the concave surface of the forming holder 216. As described above, the concave surface is provided with a plurality of gas ejection holes 232, and the inert gas supplied from the second inert gas supply unit 238 is ejected upward via the ejection holes 232. ing. The dropped molten glass is held in a state of floating from the concave surface by the jetted inert gas. Thereafter, the molten glass is cooled to some extent by the inert gas ejected from the ejection holes 232 in a state of floating from the concave surface, so that a glass lump 130 having a predetermined shape is formed. Since the formed glass lump 130 does not directly contact the inner surface of the forming holder 216, the shape of the inner surface of the forming holder 216 is not transferred. It is possible to arbitrarily change the shape of the inner surface of the forming holder 216 so as to be obtained.

  Thereafter, as shown in FIG. 6, the release agent adhering apparatus 200 does not attach the release agent to the glass lump 130 in the temperature control chamber 202, and transfers the formed glass lump 130 to the release agent adhesion chamber 118. Drop it. Specifically, the release agent adhering apparatus 200 stops the supply of the inert gas by the second inert gas supply unit 238 in a state where the temperature of the formed glass lump 130 is equal to or higher than the glass transition point (Tg). The forming holder 216 is divided in the horizontal direction, and the introduction port 105 is opened by the introduction port shutter 106. As a result, the glass block 130 having a temperature equal to or higher than the glass transition point (Tg) falls toward the release agent adhesion chamber 118 via the inlet 105. As described above, the dropped glass lump 130 is held while floating on the concave surface of the release agent attaching holder 112. Note that the release agent adhering apparatus 200 is configured so that, for example, the temperature of the glass block 130 is determined based on the temperature in the temperature control chamber 202, the time after the molten glass is dropped into the temperature control chamber 202, the gas flow rate, the gas temperature, and the like. The temperature can be determined and the drop of the glass lump 130 can be started.

  Thereafter, the glass lump 130 dropped from the temperature control chamber 202 to the release agent adhesion chamber 118 is at a temperature equal to or higher than the glass transition point (Tg), similar to the release agent adhesion device 100 according to the first embodiment described above. The release agent is attached by the release agent supply unit 124. As shown in FIG. 7, the glass block 130 to which the release agent has been attached in this manner is transferred from the release agent attachment chamber 118 to the receiver 132 in the same manner as the release agent attachment device 100 according to the first embodiment. The glass lump 130 dropped and held by the receiving tool 132.

  Thus, the release agent attaching apparatus 200 has an inert gas atmosphere inside the temperature adjustment chamber 202 and is separated from the release agent attachment chamber 118 that attaches the release agent to the glass lump 130. In the temperature control chamber 202, there is no release agent such as carbon fine powder. For this reason, even if the dripping port 207 is opened by the dripping port shutter 206, carbon fine powder or the like does not flow out from the inside of the temperature control chamber 202 into the air atmosphere, and even if high-temperature molten glass is dripped, explosion or the like. The accident does not occur. The temperature control chamber 202 is also a safety mechanism that prevents danger such as explosion. In order to provide such a safety mechanism, the release agent attaching apparatus 200 drops the molten glass from the melting furnace 10 immediately after dropping the glass block 130 from the temperature control chamber 202 to the release agent attachment chamber 118. The next glass mass 130 can be formed in the temperature control chamber 202. As a result, a separate process such as evacuation in the temperature control chamber 202 is not required, and the glass lump 130 can be produced safely and efficiently. In terms of safety on the downstream side of the release agent adhesion chamber 118, there are combustible materials such as carbon fine powder attached to the glass lump 130 as a release agent. However, the above adjustment is required because the glass temperature is low. The situation is different from that in the warm chamber 202. However, depending on the particle size and amount of carbon fine powder, etc., exposure to an air atmosphere may cause oxidation and combustion. Therefore, maintaining the inert gas atmosphere downstream of the release agent adhesion chamber 118, that is, around the transfer path for receiving the glass lump 130 by the support 132 and transferring it to the next process is to prevent danger and release. This is also important from the viewpoint of preventing the deterioration of the mold.

Further, not all of the release agent supplied into the release agent attaching device 118 by the release agent supply unit 124 is attached to one glass lump 130. That is, it is conceivable that the release agent accumulates in the release agent adhesion chamber 118 as the glass lump 130 is sequentially produced. Therefore, for example, as shown in FIG. 8, a third inert gas supply unit 240 that supplies an inert gas such as N ₂ may be optionally provided in the release agent adhesion chamber 118. In this case, the third inert gas supply unit 240 injects an inert gas onto the lower surface in the release agent adhesion chamber 118 and resuspends the release agent deposited on the lower surface in the release agent adhesion chamber 118. It is possible to efficiently attach the release agent to the glass lump 130 by stirring the mixture. Note that the method of re-floating and stirring the release agent deposited on the lower surface in the release agent adhesion chamber 118 is not limited to this, and it is naturally possible to provide a stirring fan, for example. .

  As described above, the release agent adhering apparatus 200 according to the second embodiment is similar to the release agent adhering apparatus 100 according to the first embodiment in the process of forming the glass lump 130 of the molding material. The mold release agent can be attached to the glass block 130 without cooling to a temperature lower than the glass transition point (Tg). Furthermore, the mold release agent attaching apparatus 200 according to the second embodiment includes a separate temperature control chamber 202, so that the glass lump 130 is safer and more efficient than the mold release agent attaching apparatus 100 according to the first embodiment. It is possible to produce.

(Third embodiment)
Next, the mold release agent adhesion apparatus 300 which concerns on 3rd Embodiment is demonstrated below. The mold release agent adhering devices 100 and 200 according to the first embodiment and the second embodiment attach the release agent to the glass lump 130 in a state where the temperature of the glass lump 130 is equal to or higher than the glass transition point (Tg). By this, it is an apparatus which forms the glass lump used as the shaping | molding raw material of a glass molded product. On the other hand, the release agent adhering apparatus 300 according to the third embodiment can be applied to a so-called direct press method in which the glass block 130 to which the release agent is attached is directly press-molded. It is an agent adhesion device.

(Configuration of release agent adhesion apparatus 300)
FIG. 9 is an explanatory diagram showing the configuration of the release agent adhering apparatus 300 according to the third embodiment and its surroundings. As shown in FIG. 9, the release agent attaching device 300 includes a press molding machine 308 including a lower die 302 and an upper die 304 in addition to the elements constituting the release agent attaching device 200 according to the second embodiment. , And an inert gas chamber 306. In addition, the mold release agent adhesion apparatus 300 of 3rd Embodiment shown in FIG. 9 is the release agent adhesion which concerns on 1st Embodiment instead of each element which comprises the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment. It can also be realized by adding the above configuration to each element constituting the apparatus 100. Hereinafter, the configuration of the press molding machine 308, which is a characteristic part of the present embodiment, will be mainly described, and the configurations in the release agent adhesion chamber 118 and the temperature adjustment chamber 202, which are the same configurations as in the second embodiment, are omitted. To do.

  The press molding machine 308 includes a lower mold 302 and an upper mold 304 for press-molding the glass lump 130. On the lower surface of the upper mold 304, for example, a transfer surface for transferring a lens surface (optical function surface) on one side of the glass molded product is provided. On the other hand, on the upper surface of the lower mold 302, for example, a transfer surface for transferring the lens surface (optical function surface) on the other side of the glass molded product is provided. The lower mold 302 has a cylindrical outer peripheral surface, and a body mold 320 is inserted into the outer peripheral surface. The body mold 320 is inserted so that the cylindrical outer peripheral surface of the upper mold 304 is slidably fitted when the glass molded product is press-molded. As a result, the horizontal positions of the upper mold 304 and the lower mold 302 can be accurately defined via the body mold 320, and the transfer surfaces of the upper mold 304 and the lower mold 302 can be accurately aligned. . In addition, a release agent such as carbon or boron nitride (BN) can be attached in advance to each of these molds. Thereby, in the mold release agent adhesion apparatus 300 which concerns on this embodiment, since the mold release agent has adhered to the glass lump 130 and the metal mold | die, the mold release property of the glass molded product 322 after press molding is further improved. Is possible.

  The press molding machine 308 manufactures a predetermined glass molded product 322 by pressing the glass lump 130 with the lower mold 302 and the upper mold 304 being brought close to each other in the press chamber 310. An upper die 304 is provided in the press chamber 310 in advance. The press chamber 310 is provided with a lower mold entrance 312 for allowing the lower mold 302 to enter the press chamber 310, and a lower mold entrance shutter 314 for opening and closing the lower mold entrance 312. Further, the press chamber 310 is provided with a lower mold exit 316 for exiting the lower mold 302 from the press chamber 310, and a lower mold exit shutter 318 for opening and closing the lower mold exit 316. In the example shown in FIG. 9, the lower mold | type 302 is arrange | positioned on transfer means (not shown), such as a base plate and a conveyor, for example. The press molding machine 308 can transfer the lower mold 302 to a position facing the upper mold 304 in the press chamber 310 by opening and closing the lower mold entrance shutter 314 using the transfer means.

  In the press chamber 310, a lower mold unit 324 and an upper mold unit 326 are provided. Each of the lower mold unit 324 and the upper mold unit 326 has a heating unit 328. The heating unit 328 is for heating the lower mold unit 324 and the upper mold unit 326. With this configuration, the heating unit 328 heats the lower mold unit 324 and the upper mold unit 326, and the lower mold 302 and the upper mold 304 that are in contact with the lower mold unit 324 or the upper mold unit 326 are heated. The press molding machine 308 can control the pressing force of the lower mold unit 324 and the upper mold unit 326, and can control the heating by the heating unit 328.

The inert gas chamber 306 is a chamber maintained in an inert gas atmosphere such as nitrogen (N ₂ ) gas, for example. In the inert gas chamber 306, the press molding machine 308 is provided. As a result, the inside of the press chamber 310 of the press molding machine 308 is also maintained in an inert gas atmosphere.

  The configuration of the press molding machine 308, which is a characteristic part of the release agent attaching device 300 according to the third embodiment, has been described above, but the present embodiment is not limited to this. That is, the example shown in FIG. 5 is an example for explaining the present embodiment. For example, if it is a molding machine for press molding a glass molded product, press molding using various heating systems, pressing systems, etc. A machine can be employed and other components can naturally be included.

(Pressing process of glass lump 130)
Next, in the mold release agent adhering apparatus 300 according to the third embodiment configured as described above, the operation of molding the glass molded product 322 by the press molding machine 308 from the glass lump 130 to which the mold release agent is adhered. This will be described below.

  The release agent adhering apparatus 300 according to the third embodiment manufactures a glass molded product 322 by a so-called direct press method in which the glass lump 130 to which the release agent is attached is directly pressed by a press molding machine 308. Therefore, when the glass lump 130 to which the release agent is attached is subjected to press molding, the temperature is suitable for press molding, that is, at least a glass transition point (Tg) or higher, and in many cases the yield point (At). Set as above. For this reason, in the mold release agent adhesion apparatus 300, the glass lump 130 formed in the temperature control chamber 202 is dropped into the mold release agent adhesion chamber 118 in a temperature state equal to or higher than the glass transition point (Tg). In the mold release agent adhering apparatus 118, the mold release agent adheres to the glass lump 130 in a state where the temperature of the glass lump 130 dropped from the temperature control chamber 202 is equal to or higher than the glass transition point (Tg), and the extraction port 113. To fall through. The mold release agent attaching apparatus 300 adjusts the temperature of the glass lump 130 based on, for example, the temperature in the temperature control chamber 202 and the mold release agent adherence chamber 118, the elapsed time after the molten glass or glass lump 130 is dropped, and the like. Judgment can be made. In addition, since the process which forms the glass lump 130 from the glass dripped from the melting furnace 10, and adheres a mold release agent is the same as that of Embodiment 2 mentioned above, detailed description is abbreviate | omitted here.

  The yield point (At) is a temperature higher than the glass transition point (Tg), and is a temperature (yield point) at which the amount of thermal expansion of the glass accompanying the temperature rise stops and rapidly decreases. In the present embodiment, the yield point (At) varies as appropriate depending on the type of molten glass used.

  As in the second embodiment, the glass lump 130 to which the release agent dropped through the extraction port 113 is attached is provided in an inert gas chamber 306 as shown in FIG. The lower mold 302 is held by the transfer surface. When the lower mold entrance 312 is opened by the lower mold entrance shutter 314, the lower mold 302 holding the glass block 130 enters the press chamber 310 by the transfer means and is transferred to a position facing the upper mold 304.

  When the lower mold 302 is transferred into the press chamber 310, the glass block 130, the upper mold 304, and the lower mold 302 are adjusted by the heating unit 328 so that the temperatures are optimal for molding. When the temperature adjustment is completed, as shown in FIG. 11, the upper mold 304 and the lower mold 302 are brought close to each other to press the glass lump 130, thereby forming a glass molded product 322. In the temperature adjustment, since the glass lump 130 is transferred at a high temperature, it can be set to a desired temperature in a very short time compared to the case of the reheat press in which the temperature is raised from room temperature to the molding temperature. Thereafter, after being cooled to a predetermined temperature, the upper mold unit 326 is lifted, and the lower mold 302 is discharged from the press molding machine 308 through the lower mold exit port 316 opened by the lower mold exit shutter 318. .

  Note that the example shown in FIG. 11 is an example for describing the present embodiment, and the present invention is not limited to this. For example, it is also possible to continuously place a plurality of press molding machines and press-mold the glass molded product 322 continuously. It is also possible to provide a heating unit in the transfer means for the lower mold 302 dropped from the release agent adhesion chamber 118 so that the lower mold 302 is heated when the lower mold 302 is transferred to the press molding machine 308. It is. Furthermore, for example, the mold release agent adhesion chamber 118 can be transferred into the press molding machine 308 and the glass block 130 can be dropped directly onto the lower mold 302 heated at the opposite position of the upper mold 304. Thus, if the mold release agent adhesion apparatus 300 which concerns on 3rd Embodiment directly press-molds the glass lump 130 to which the mold release agent adhered in the temperature state more than a glass transition point (Tg), it will be specified. However, the present invention is not limited to the configuration of the press molding machine. Therefore, the present invention is not limited to the press molding machine 308 shown in FIG. 9, and any molding machine having various methods and configurations can be applied as long as it is a molding machine for press molding the glass lump 130 to which the release agent is attached. Is possible

  As described above, the mold release agent adhering apparatus 300 according to the third embodiment, in the process of forming the glass lump 130 of the molding material, without cooling the glass lump 130 to a temperature lower than the glass transition point (Tg), It is possible to attach the release agent to the glass block 130. Furthermore, since the release agent adhering apparatus 300 according to the third embodiment includes the press molding machine 308, the release agent adhering apparatus 300 is so-called with respect to the glass block 130 to which the release agent is attached at a temperature higher than the glass transition point (Tg). Press molding by the direct press method is possible.

  In the third embodiment, the example in which the release agent is attached to the glass lump 130 in the state where the temperature of the glass lump 130 is equal to or higher than the glass transition point (Tg) has been described, but the present invention is limited to this. is not. For example, it is possible to attach the release agent to the glass block 130 in a state higher than the yield point (At) higher than the glass transition point (Tg). In this case, since the hotter glass lump 130 can be transferred to the press molding machine 308, direct pressing can be performed efficiently.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, the various drawings used in the description of the above embodiment are examples for explaining the above embodiment, and the present invention is not limited to this. For example, a holder having a shape different from that of the holders 112 and 216 shown in FIGS. In addition, as long as the press molding machine 308 shown in FIGS. 9 to 11 is a molding machine for press-molding the glass lump 130 to which the release agent is attached, it is of course possible to apply molding machines of various methods and configurations. Is possible.

It is explanatory drawing which shows the structure of the mold release agent adhesion apparatus 100 which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows introduction | transduction of the molten glass to the mold release agent adhesion chamber 118 in the mold release agent adhesion apparatus 100 which concerns on 1st Embodiment. FIG. 6 is an explanatory diagram showing generation of a glass lump 130 in a release agent adhesion chamber 118 in the release agent adhesion device 100 according to the first embodiment. It is explanatory drawing which shows extraction of the glass lump 130 from the mold release agent adhesion chamber 118 in the mold release agent adhesion apparatus 100 which concerns on 1st Embodiment. It is explanatory drawing which shows the structure of the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment of this invention. It is explanatory drawing which shows the fall to the mold release agent adhesion chamber 118 of the glass lump 130 in the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment. It is explanatory drawing which shows extraction of the glass lump 130 from the mold release agent adhesion chamber 118 in the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment. It is explanatory drawing which shows another structure in the mold release agent adhesion apparatus 200 which concerns on 2nd Embodiment. It is explanatory drawing which shows the structure of the mold release agent adhesion apparatus 300 which concerns on 3rd Embodiment of this invention. It is explanatory drawing which shows the transfer to the press molding machine 308 of the glass lump 130 in the mold release agent adhesion apparatus 300 which concerns on 3rd Embodiment. It is explanatory drawing which shows press molding to the glass molded product 322 in the mold release agent adhesion apparatus 300 which concerns on 3rd Embodiment.

Explanation of symbols

100, 200, 300 Release agent adhering device 105 Inlet port 106 Inlet port shutter 112 Release agent adhering holder 113 Extraction port 114 Extraction shutter 118 Release agent adhesion chamber 120 First inert gas supply unit 124 Release agent Supply unit 128, 232 Gas ejection hole 130 Glass lump 202 Temperature control chamber 206 Drip port shutter 207 Drip port 216 Formation holder 238 Second inert gas supply unit 240 Third inert gas supply unit 302 Lower mold 304 Upper mold 306 Inert gas chamber 308 Press molding machine

Claims (14)

A release agent adhesion chamber having an inlet that can be opened and closed by an inlet shutter;
A release agent attachment holder provided in the release agent attachment chamber and having a gas ejection hole;
By supplying an inert gas to the gas ejection hole of the release agent adhesion holder, the glass introduced through the introduction port is held in a state of being floated from the release agent adhesion holder. An inert gas supply unit,
A mold release agent supply section for attaching the mold release agent to the glass in a state of floating from the mold release agent adhesion holder by supplying the mold release agent into the mold release agent adhesion chamber;
A release agent adhering apparatus comprising: The glass introduced through the introduction port is a molten glass dropped from a melting furnace,
The inert gas supply unit supplies the inert gas to the gas ejection hole of the release agent adhesion holder, and the molten glass is floated from the release agent adhesion holder. Cool to form a glass lump,
The mold release agent supply unit supplies the mold release agent to the glass block formed in a state of floating from the mold release agent attachment holder by supplying the mold release agent into the mold release agent adhesion chamber. The release agent attaching device according to claim 1, wherein the release agent attaching device is attached. The release agent attaching device further includes:
A temperature control chamber for forming a glass lump from molten glass dripped from a melting furnace,
The temperature control chamber includes a dropping port that is located above the release agent adhesion chamber and is an opening for introducing the molten glass into the temperature control chamber, and a dropping port shutter that opens and closes the dropping port. ,
In the temperature control chamber, there is provided a forming holder configured to have a gas ejection hole and to form a dropping path for dropping the glass lump,
The inert gas supply unit cools the molten glass in a state of being floated from the forming holder to form a glass lump by supplying an inert gas to a gas ejection hole of the forming holder. ,
The forming holder introduces the glass block into the release agent adhering chamber through the introduction port by dropping the formed glass block from a dropping path of the forming holder. The release agent attaching device according to claim 1, characterized in that it is characterized in that The release agent adhesion holder is configured to be able to form a drop path for dropping the glass lump,
The release agent adhesion chamber includes an extraction port for extracting the glass lump falling from the release path of the release agent adhesion holder from the release agent adhesion chamber, and an extraction port for opening and closing the extraction port. The release agent attaching device according to claim 2, further comprising a shutter.   5. The mold release agent adhesion according to claim 4, wherein the mold release agent adhesion apparatus further includes a receiving tool that receives and holds the glass block to which the mold release agent falling from the extraction port is adhered. apparatus.   The mold release agent adhering apparatus according to claim 5, wherein the receiver is a lower mold for press-molding a glass lump to which the mold release agent is attached.   The release agent attaching device further includes a transfer device for moving the lower die at a position facing the upper die for press-molding the glass lump to which the release agent is attached. The mold release agent adhering apparatus according to claim 6. The mold release agent attaching apparatus further includes an inert gas chamber maintained in an inert gas atmosphere,
The mold release agent adhering apparatus according to claim 6 or 7, wherein the upper mold and the lower mold are provided in the inert gas chamber.   The mold release agent supply unit attaches the mold release agent to the glass block in a state where the temperature of the glass block in the state of rising from the release agent attaching holder is equal to or higher than a glass transition point (Tg). The mold release agent adhesion apparatus in any one of Claims 1-8 characterized by the above-mentioned.   The mold release agent adhering device according to any one of claims 1 to 9, wherein the mold release agent is a powder mold release agent mainly composed of at least carbon or boron nitride.   11. The release agent adhering apparatus according to claim 1, wherein an average particle diameter of the powder release agent is 50 μm or less. A method for producing a glass mass supplied as a raw material for molding a glass molded article, comprising:
A molten glass dropping step of dropping glass melted from a melting furnace into a release agent attaching holder having a gas ejection hole, which is installed in a release agent attaching chamber maintained in an inert gas atmosphere;
A glass lump forming step of forming a glass lump in a state where the molten glass is levitated from the release agent attaching holder by blowing an inert gas into the gas discharge hole;
By supplying the release agent into the release agent attachment chamber in a state where the temperature of the glass block formed in the state of floating from the release agent attachment holder is equal to or higher than the glass transition point (Tg). , A release agent attaching step for attaching a release agent to the glass block,
The manufacturing method of the glass lump characterized by including. A method for producing a glass mass supplied as a raw material for molding a glass molded article, comprising:
The glass melted from the melting furnace is installed in a temperature control chamber that is maintained in an inert gas atmosphere, has a gas ejection hole, and is configured to form a drop path for dropping the glass lump. A molten glass dropping step for dropping on the tool;
A glass lump forming step of forming a glass lump in a state where the molten glass is levitated from the forming holder by ejecting an inert gas into a gas ejection hole of the forming holder;
A dropping step of dropping the formed glass block into a release agent attaching holder having a gas ejection hole installed in a release agent attaching chamber through a dropping path of the forming holder;
By injecting an inert gas into the gas ejection hole of the release agent adhesion holder, the glass lump is held in a state of being floated from the release agent adhesion holder, and the inside of the release agent adhesion chamber A mold release agent attaching step of attaching the mold release agent to the glass mass in a state where the temperature of the glass mass is equal to or higher than the glass transition point (Tg) by supplying the mold release agent to
The manufacturing method of the glass lump characterized by including. A method for molding a glass molded product, comprising: attaching a release agent to a glass lump supplied as a material for molding a glass molded product; and molding the glass molded product by press molding:
The glass melted from the melting furnace is installed in a temperature control chamber that is maintained in an inert gas atmosphere, has a gas ejection hole, and is configured to form a drop path for dropping the glass lump. A molten glass dropping step for dropping on the tool;
A glass lump forming step of forming a glass lump in a state where the molten glass is levitated from the forming holder by ejecting an inert gas into a gas ejection hole of the forming holder;
The formed glass lump is installed in a release agent adhering chamber through a drop path of the forming holder, has a gas ejection hole, and can form a drop path for dropping the glass lump. A dropping step for dropping onto the released release agent adhesion holder,
By injecting an inert gas into the gas ejection hole of the release agent adhesion holder, the glass lump is held in a state of being floated from the release agent adhesion holder, and the inside of the release agent adhesion chamber A mold release agent attaching step of attaching the mold release agent to the glass mass in a state where the temperature of the glass mass is equal to or higher than the glass transition point (Tg) by supplying the mold release agent to
The glass block to which the release agent is adhered is extracted from the release agent adhesion chamber via a dropping path of the release agent adhesion holder, and is installed below the release agent adhesion chamber. Glass lump extraction step to drop into the lower mold for molding,
A press molding step of molding a desired glass molded product by press molding a glass lump to which the release agent dropped on the lower mold is attached;
A method for forming a glass molded product, comprising:

Images