CN104556635A - Glass discharging device and method, and manufacturing method of pre-moulding parison and optical elements - Google Patents
Glass discharging device and method, and manufacturing method of pre-moulding parison and optical elements Download PDFInfo
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- CN104556635A CN104556635A CN201410548777.1A CN201410548777A CN104556635A CN 104556635 A CN104556635 A CN 104556635A CN 201410548777 A CN201410548777 A CN 201410548777A CN 104556635 A CN104556635 A CN 104556635A
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- glass
- pipe
- diameter portion
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
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- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention provides a glass discharging device and method, and a manufacturing method of pre-moulding parison and optical elements. A pipe lower end is provided with a diameter expanding part which is capable of restraining deviated flowing of fused glass. In particular, the invention provides a glass discharging device, a glass discharging method, a manufacturing method of pre-moulding parison for punching forming, and a manufacturing method of an optical element. The glass discharging device (1) discharges fused glass from a pipe. A constant diameter part (6) and an expansion diameter part (8) are formed in a glass flow path (2) in which the fused glass can flow of the pipe. The constant diameter part (6) extends in upper and lower directions and the inner diameter is constant. The expansion diameter part is connected with the constant diameter part (6) and the inner diameter is gradually expanded towards lower end. A shrinkage diameter part (10) whose inner diameter shrinks towards tail end is formed on the inner surface of the lower end edge of the expansion diameter part (8).
Description
Technical field
The present invention relates to the manufacture method of glass bleeder, glass outflow method, impact briquetting preformed parison, and the manufacture method of optical element, particularly for the manufacture of the glass bleeder of the glass ware forming product such as preformed parison and glass outflow method, employ this glass and flow out the manufacture method of the impact briquetting preformed parison of device and method and employ the manufacture method of optical element of the preformed parison produced by this manufacture method.
Background technology
Known following method in the past: flow out melten glass from outlet pipe, the fused glass block of specified amount is supplied on forming mould, molds the preformed parison of impact briquetting.By making to be supplied to melten glass formation of lots on forming mould, cooling, preformed parison can be produced.
As such outlet pipe, such as, disclose at patent documentation 1 (especially in figure 3), in order to increase the weight of dripping of melten glass, manufacturing large-scale preformed parison, and being formed with the outlet pipe of the large wide diameter portion of internal diameter at pipe terminal part.
Further, such as, Patent Document 2 discloses, in order to postpone the dripping of melten glass from pipe, and defining the outlet pipe of the melten glass of the wide diameter portion expanded towards glass flows exit inside diameter.And, Patent Document 2 discloses following method (following, be called the decline process of chopping), in order to obtain the large preformed parison of weight that weight ratio melten glass drips naturally from outlet pipe end, forming mould is utilized to support the end of the melten glass flowed out, when being detained to have during the melten glass of the amount of expectation in forming mould, forming mould is declined rapidly, the melten glass flowed out from outlet pipe and the melten glass be trapped in forming mould are separated, obtains the fused glass block of desired amount.
Usually, preformed parison shaping in, use multiple forming mould, these forming moulds are moved to successively the below of outlet pipe, make them stop and accept fused glass block, the forming mould receiving fused glass block is taken out of from stop place, next forming mould being moved to the below of outlet pipe simultaneously, make it stop, and supply fused glass block.By falling the process of chopping, the fused glass block that fused glass block that weight ratio drips naturally is large can be obtained.And then in order to mold large-scale preformed parison, the melten glass discharge (hereinafter referred to as turnout) of unit time must be increased.When increasing turnout, melten glass does not drip and is trapped between outlet pipe end and shortens.Its result is, produces dripping of melten glass at next forming mould before moving to the below of outlet pipe, thus cannot stably produce preformed parison.
According to the such outlet pipe recorded in patent documentation 1,2, even if increase turnout, melten glass also can be made naturally not drip and to be trapped in time of pipe end elongated.
According to such reason, the method recorded in patent documentation 1,2 is effective stably manufacturing on large-scale preformed parison.
Patent documentation 1: Japanese Unexamined Patent Publication No. 8-188419 public Reported
Patent documentation 2: Japanese Unexamined Patent Publication No. 10-36123 public Reported
Here, in order to manufacture larger preformed parison, needing to increase turnout further, increasing the bore of the glass flows outlet of outlet pipe simultaneously, and extend melten glass and naturally do not drip and time of being trapped in outlet pipe end.But when increasing the bore of pipe lower end further, as shown in Figure 6, melten glass 220 leaves from a part for the inner peripheral surface of wide diameter portion 208, and is partial to the side face (left side of Fig. 6) of opposition side.In addition, such phenomenon is called " bias current " in this manual.
After there is such bias current, also there is the situation that melten glass 220 gets back to the state flowed with the state contacted with the whole inner peripheral surface of wide diameter portion 208 again.But, after there occurs bias current, in melten glass 220, be involved in gas, thus be mixed into bubble in preformed parison, or produce brush line, the problem that the quality that therefore there is preformed parison reduces.
Summary of the invention
The present invention completes in view of stating problem, its object is to apply the glass bleeder at pipe lower end wide diameter portion and glass outflow method that have and the bias current of melten glass can be suppressed to occur, and provide and flow out melten glass by described outflow method and mold the manufacture method of the impact briquetting preformed parison of impact briquetting preformed parison and use the manufacture method of optical element of the preformed parison produced by the manufacture method of this shaping preformed parison.
Glass bleeder of the present invention flows out melten glass from pipe, and this pipe is formed in the stream for melten glass flowing: constant diameter portion, and it extends and constant inner diameter along the vertical direction; And wide diameter portion, itself and constant diameter portion in succession and have the shape expanded towards bottom diameter, wherein, are formed with at the internal surface of the lower ora terminalis of wide diameter portion the reducing diameter part reduced towards end internal diameter.
Further, glass outflow method of the present invention flows out melten glass from pipe, and this pipe is formed in the stream for melten glass flowing: constant diameter portion, and it extends and constant inner diameter along the vertical direction; And wide diameter portion, itself and constant diameter portion in succession and have the shape expanded towards bottom diameter, wherein, form at the internal surface of the lower ora terminalis of pipe the reducing diameter part reduced towards end internal diameter.
Melten glass has the tendency attenuated due to surface tension, but according to the present invention, be formed with reducing diameter part at the lower ora terminalis of wide diameter portion, therefore maintain the state also contacted with pipe inner peripheral surface at the bottom melten glass of wide diameter portion, the generation of the bias current of melten glass can be suppressed.
According to glass bleeder of the present invention and glass outflow method, the generation of the bias current of melten glass can be suppressed.Further, according to the manufacture method of impact briquetting preformed parison of the present invention, the preformed parison that homogeneity is high can be produced.Further, according to the manufacture method of optical element of the present invention, from melten glass through preformed parison, the optical element of high-quality can stably be produced.
Accompanying drawing explanation
Fig. 1 is the vertical sectional view of the glass bleeder that present embodiment is shown.
Fig. 2 will amplify the vertical sectional view illustrated near the wide diameter portion of the glass bleeder of present embodiment and reducing diameter part.
Fig. 3 is the vertical sectional view of the shape of the bottom of the wide diameter portion that the glass bleeder not possessing reducing diameter part is shown, shows the state flowing out melten glass.
Fig. 4 is in the glass bleeder of present embodiment, the vertical sectional view shown in being amplified the bottom of the wide diameter portion under the state flowing out melten glass.
Fig. 5 be the melten glass flowed out from outlet pipe is supplied to the forming mould stopped in the below of outlet pipe be located at the recess of upper surface time, the vertical sectional view of outlet pipe, melten glass and forming mould.
Fig. 6 is the figure of the bias current for illustration of melten glass.
Label declaration
1: glass bleeder;
2: outlet pipe;
3: glass stream;
6: constant diameter portion;
8: wide diameter portion;
9: glass flows exports;
10: reducing diameter part;
11: forming mould;
12: recess;
20: melten glass.
Embodiment
Below, with reference to accompanying drawing, an embodiment of glass bleeder of the present invention is described in detail.
Fig. 1 is the vertical sectional view near the bottom of the outflow melten glass of the glass bleeder 1 that present embodiment is shown.The glass bleeder 1 of present embodiment has not shown melting crucible on top, and has the outlet pipe 2 that the melten glass of savings in melting crucible is flowed downwards.Outlet pipe 2 carries out temperature by not shown heating unit and lagging material and controls, to make melten glass flow out with the flow expected, and can not devitrification.In addition, known device can be applied for heating unit, such as, make electric current flow through outlet pipe to produce the electrified regulation mechanism of joule heating; At the periphery configuring high-frequency coil of outlet pipe, high frequency electric source is connected to coil, and is flowed by high-frequency current, outlet pipe is carried out to the high-frequency induction heating mechanism etc. of induction heating.Further, known material can be used as lagging material.
As shown in Figure 1, outlet pipe 2 possesses the glass stream 3 extended along the vertical direction in inside.Glass stream 3 has: constant diameter portion 6, and its top is connected with the bottom of melting crucible, has constant internal diameter simultaneously; With wide diameter portion 8, its internal diameter from the lower end in constant diameter portion 6 along with increasing downward and continuously.Melten glass in melting crucible flows down in glass stream 3, and flows out from the opening portion arranged in the below of wide diameter portion 8 and glass flows outlet 9.
Fig. 2 is by the vertical sectional view shown in the amplification of the bottom of the wide diameter portion 8 of the outlet pipe 2 of the glass bleeder 1 of present embodiment.As shown in the drawing, at the lower ora terminalis of the wide diameter portion 8 of outlet pipe 2, be formed with the reducing diameter part 10 along with the internal diameter towards end reduces at complete cycle.Reducing diameter part 10 passes through the center in the form of a ring outstanding formation of internal surface towards glass stream 3 of glass stream 3.The surface of reducing diameter part 10 in vertical section in roughly arc-shaped.In addition, in the present embodiment, constant diameter portion 6 directly extends from the connection section with melting crucible, but the present invention is not limited thereto, between the connection section and constant diameter portion 6 of melting crucible, the internal diameter distinct portions in internal diameter and constant diameter portion 6 also can be set.Such as, in order to control the discharge of melten glass, internal diameter also can diminish from the connection section with melting crucible towards constant diameter portion 6 stepsly.Further, also the internal diameter part less than the internal diameter in constant diameter portion 6 can be set above constant diameter portion 6.
Below, the shape of the reducing diameter part 10 of present embodiment is described in more detail.
Fig. 3 is the vertical sectional view of the shape of the bottom of the wide diameter portion that the glass bleeder not possessing reducing diameter part is shown, shows the state flowing out melten glass.As shown in the drawing, in glass bleeder 101 in the past, be not provided with reducing diameter part in the lower end of wide diameter portion 108, therefore the lower end of the glass stream of glass bleeder 101 is towards roughly vertical below.When using such glass bleeder 101, at the height location P ' place of the lower end of wide diameter portion 108, melten glass 120 leaves from pipe internal surface.Now, as shown in Figure 3, the periphery of melten glass 120 does not extend from the position left from pipe internal surface to vertical below, and because capillary impact is towards interior lateral bend and undergauge.Here, the angle of the tangent line L ' 1 at the tangent line L ' 0 of pipe internal surface of height location P ' that leaves from pipe internal surface of this melten glass 120 and the height location P place of the periphery of melten glass is contact angle θ
0.The internal diameter of wide diameter portion 108 lower end is larger, contact angle θ
0larger.
In addition, such as melten glass is boronic acid containing lanthanum glass, and viscosity during outflow is 5 ~ 6dPass, when the internal diameter (internal diameter of glass flows outlet) of pipe bottom is for 9mm, and above-mentioned contact angle θ
0in the scope of roughly 30 ~ 35 degree, when the internal diameter in pipe bottom is 16mm, above-mentioned contact angle θ
0in the scope of roughly 40 ~ 45 degree.
Fig. 4 is by the vertical sectional view shown in the amplification of the bottom of the wide diameter portion 8 of the outlet pipe 2 of present embodiment, shows the state flowing out melten glass 20.As shown in the drawing, be configured in the glass bleeder 1 of present embodiment, the upper end of reducing diameter part 10 is positioned at height location P.Preferably, this height location P is equal with the height location P ' that the melten glass 120 of the glass drop lower device not possessing above-mentioned reducing diameter part leaves from pipe internal surface.
Reducing diameter part 10 has the surface shape of roughly arc-shaped (outside to pipe is protruded) in vertical section, and preferably at its topmost and height location P place, the tangent line on the surface of the reducing diameter part 10 in vertical section is maximum relative to the angle of vertical direction.In the present embodiment, throttle angle θ is preferably more than 10 degree, and when the internal diameter in the lower end of pipe is at more than 9mm, throttle angle θ is preferably more than 20 degree.And more preferably this throttle angle θ is greater than contact angle θ
0.
For the material of outlet pipe 2, preferred thermotolerance, erosion resistance be outstanding, have powered and can the platinum group materials such as platinum, platinum alloy, strengthening platinum of electrified regulation or high-frequency induction heating.
Below, the method utilizing this glass bleeder 1 to manufacture preformed parison is described.
When manufacturing preformed parison, first, using glass melting apparatus, by frit melting, clarification also homogenizing in the melting crucible in glass melting apparatus, making melten glass.Melten glass flows into from the connection section of the melting crucible bottom outlet pipe 2 to glass bleeder 1.Melten glass flows down in glass stream 3.Melten glass, before the forming mould accepting melten glass is transferred to below outlet pipe 2, is trapped in glass flows outlet 9, does not drip.
During melten glass is stranded in glass flows outlet 9, forming mould is transferred to below outlet pipe 2, and makes it stop, melten glass is flowed out in the recess on forming mould.
Fig. 5 be the melten glass flowed out from outlet pipe 2 is supplied to the forming mould 11 that stops in the below of outlet pipe 2 be located at the recess 12 of upper surface time, the vertical sectional view of outlet pipe 2, melten glass and forming mould 11.
When melten glass flows and flows out from glass flows outlet 9 in glass stream 3, attenuate due to surface tension and leave from pipe inner peripheral surface, easy generation bias current, but because the lower ora terminalis at wide diameter portion 8 is formed with reducing diameter part 10, so as shown in Figure 5, also maintain the state that melten glass contacts with pipe inner peripheral surface in the bottom of wide diameter portion 8.Therefore, it is possible to suppress the generation of the bias current of melten glass 20.
When the melten glass flowed out to the recess 12 of forming mould 11 reaches specified amount, utilize not shown lifting device that forming mould 11 is declined rapidly, the melten glass on recess 12 is separated (the decline process of chopping) from the melten glass flowed out from glass flows outlet.Utilize the gas from the not shown multiple pore ejections formed at recess 12, the fused glass block be separated is subject to blast upwards and floats, and the shape being molded into regulation in this condition becomes preformed parison.The floating method of forming is called as with the method for floating state forming glass like this on forming mould 11.
In addition, preformed parison not bubbles, the brush line formed like this, has high uniformity, is therefore applicable to the formed material of the optical elements such as lens.As method preformed parison formation being become optical element, can illustrate and precise punch forming method is shown.In an example of precise punch forming method, first, under the state that preformed parison is received into forming mould, make it heat, soften, then utilize forming mould to carry out punching press.Thereby, it is possible to obtain the optical element of the shape corresponding with forming mould.
Glass bleeder 1 according to the present embodiment, is formed with reducing diameter part 10 at the lower ora terminalis of wide diameter portion 8, therefore maintains the state also contacted with pipe internal surface at the bottom melten glass of wide diameter portion 8.Therefore, it is possible to suppress the generation of the bias current of melten glass.
Further, the throttle angle θ of the reducing diameter part 10 of the glass bleeder 1 of present embodiment is greater than contact angle θ
0.Thus, the surface of reducing diameter part 10 enters into the position in the inner part, surface than the molten glass flow of the situation not possessing reducing diameter part.Thereby, it is possible to suppress melten glass to leave from pipe internal surface, suppress the generation of bias current.
And by using the glass bleeder of present embodiment to manufacture preformed parison, can suppress the generation of the bias current of melten glass, preformed parison is inner, the generation of brush line to suppress bubble to be mixed into, and can produce the preformed parison that homogeneity is high.Manufacture optical element by the preformed parison using homogeneity high in this wise, stably can manufacture the optical element of high-quality.
In addition, in the above-described embodiment, being formed as by reducing diameter part in curved shape in vertical sectional view, but the present invention is not limited thereto, also can be rounding frustum shape etc.In order to suppress bias current to occur more reliably, preferably, when vertically analysing and observe observation, wide diameter portion is connected smoothly with reducing diameter part, that is, the inclination of the inclination of the tangent line of wide diameter portion and the tangent line of reducing diameter part changes continuously.
And, in the above-described embodiment, the situation equal with the height location P ' that the melten glass 120 of the glass drop lower device not possessing reducing diameter part leaves from pipe internal surface to the height location P of the upper end of reducing diameter part 10 is illustrated, but be not limited thereto, height location P can be the position that the height location P ' that leaves from pipe internal surface than the melten glass 120 of the glass drop lower device not possessing reducing diameter part is high also can be low position.
Here, contriver's glass bleeder according to the present embodiment, confirms the generation that can suppress bias current by experiment, is described therefore.
In this experiment, use the pipe of the internal diameter of lower end of pipe and throttle angle different platinum that melten glass is flowed out, utilize the decline cut-out method ?floating method of forming to carry out the shaping of preformed parison, in each pipe, tune Check is carried out to the occurrence frequency of bias current.In addition, bias current occurrence frequency made melten glass carry out the shaping of preformed parison from pipe outflow by continuous 24 hours, and the number of times of the bias current occurred during this period represents.
As glass material, be used as MP-TAFD305 (the refractive index n d=1.8535 of HOYA Corp. of the glass of boronic acid containing lanthanum, Abbe number ν d=40.1) and MP-BACD12 (refractive index n d=1.58313, Abbe number ν d=59.46).Further, as glass material, when using MP-TAFD305, in the scope of 1000 ~ 1100 DEG C, when using MP-BACD12, in the scope of 950 ~ 1100 DEG C, the temperature of pipe is set to glass can not the temperature of devitrification.
In addition, when bias current occurs, carry out the outflow adjustment of melten glass, carry out the operation that the outflow of glass is started again not have the state of bias current.
Table 1 and table 2 are the table representing bias current occurrence frequency glass material being used to the situation of MP-TAFD305 and MP-BACD12 respectively.
[table 1]
[table 2]
As shown in these tables 1 and table 2, because throttle angle is large, the no matter diameter of pipe and the kind of glass material, all reduces the occurrence frequency of bias current.Therefore, confirm to arrange reducing diameter part by the lower ora terminalis at pipe, the generation of bias current can be suppressed.
And confirm following situation, use MP-TAFD305, when the internal diameter of the lower end of pipe is 16mm, throttle angle can be carried out shaping more than 20 degree, but under condition in addition, as long as throttle angle just roughly can carry out the making of preformed parison more than 10 degree.Therefore the known throttle angle that preferably makes is more than 10 degree.
Also confirm, when throttle angle is more than 20 degree, the making of preformed parison can both be carried out at all conditions.Therefore, when the internal diameter of the lower end of pipe is at more than 9mm, particularly preferably throttle angle is more than 20 degree.
[Production Example of optical element]
Above-mentioned each preformed parison is used to carry out the manufacture of optical element.Here, the Production Example of non-spherical lens is shown as the Production Example of optical element.
At first, the punch-forming mold be made up of parts such as upper die and lower die, cylinder moulds is prepared.The molding surface of upper die and lower die is critically processed into the shape after using the concavo-convex upset of the shape in the optical function face (lens face) of the non-spherical lens as target, and is coated with the mold release film of carbon element film.
Next preformed parison is imported in the space surrounded by upper die and lower die, cylinder mould, heating is until Glass Transition together, utilize upper die and lower die to carry out punching press to preformed parison, the shape of molding surface is critically transferred on glass, thus precise punch forming goes out the shape of non-spherical lens.
Then make shaping glass cools and take out glass from punch-forming mold, obtaining non-spherical lens.
In addition, the condition of precise punch forming, the shape material of punch-forming mold and other adopt known condition, material.
Finally, the general overview present embodiments such as accompanying drawing are used.
As shown in Figure 1, the glass bleeder 1 of present embodiment to drip melten glass from outlet pipe 2, and this outlet pipe 2 is formed in the glass stream 3 for melten glass flowing: constant diameter portion 6, and it extends and constant inner diameter along the vertical direction; With wide diameter portion 8, itself and constant diameter portion 6 in succession and have the shape expanded towards bottom diameter, wherein, are formed with the reducing diameter part 10 reduced towards end internal diameter at the internal surface of the lower ora terminalis of wide diameter portion 8.
Claims (6)
1. a glass bleeder, it flows out melten glass from pipe, and this pipe is formed in the stream for melten glass flowing: constant diameter portion, and it extends and constant inner diameter along the vertical direction; And wide diameter portion, itself and described constant diameter portion in succession and there is the shape expanded towards bottom diameter, wherein,
The reducing diameter part reduced towards end internal diameter is formed at the internal surface of the lower ora terminalis of described wide diameter portion.
2. glass bleeder according to claim 1, wherein, when set the internal surface of described reducing diameter part relative to the maximum angle of vertical direction as throttle angle time, described throttle angle is more than 10 degree.
3. glass bleeder according to claim 2, wherein, the internal diameter of the lower end of described pipe is at more than 9mm, and described throttle angle is more than 20 degree.
4. a glass outflow method, flows out melten glass from pipe, and this pipe is formed in the stream for melten glass flowing: constant diameter portion, and it extends and constant inner diameter along the vertical direction; And wide diameter portion, itself and described constant diameter portion in succession and there is the shape expanded towards bottom diameter, wherein,
The reducing diameter part reduced towards end internal diameter is formed at the internal surface of the lower ora terminalis of described pipe.
5. an impact briquetting manufacture method for preformed parison, it flows out melten glass by glass outflow method according to claim 4 and molds impact briquetting preformed parison.
6. a manufacture method for optical element, it possesses:
The step of impact briquetting preformed parison is manufactured by the manufacture method of impact briquetting preformed parison according to claim 5;
To the step of described preformed parison heating; And
Stamping forming step is carried out to by the described preformed parison heated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013217103A JP2015078099A (en) | 2013-10-18 | 2013-10-18 | Glass outflow device, glass outflow method, method of manufacturing preform for press molding, and method of manufacturing optical element |
| JP2013-217103 | 2013-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104556635A true CN104556635A (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410548777.1A Pending CN104556635A (en) | 2013-10-18 | 2014-10-16 | Glass discharging device and method, and manufacturing method of pre-moulding parison and optical elements |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015078099A (en) |
| CN (1) | CN104556635A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08188419A (en) * | 1995-01-10 | 1996-07-23 | Olympus Optical Co Ltd | Fused glass-supplying nozzle |
| JP2004339002A (en) * | 2003-05-15 | 2004-12-02 | Canon Inc | Device and method for allowing molten glass to flow out |
| CN1880249A (en) * | 2005-06-06 | 2006-12-20 | Hoya株式会社 | Precision mould-pressing forming prefoamer production method and optical component production method |
| JP2009096684A (en) * | 2007-10-18 | 2009-05-07 | Ohara Inc | Flow passage for flowing-out molten glass |
| CN202089884U (en) * | 2011-06-27 | 2011-12-28 | 山东瑞泰玻璃绝缘子有限公司 | Bowl |
| CN202594944U (en) * | 2012-06-01 | 2012-12-12 | 安徽杜氏高科玻璃有限公司 | Nichrome orifice ring |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0234525A (en) * | 1988-07-22 | 1990-02-05 | Hoya Corp | Method for forming glass element |
| JPH1036123A (en) * | 1996-07-24 | 1998-02-10 | Ohara Inc | Production of glass gob |
| JP2002104829A (en) * | 2000-09-26 | 2002-04-10 | Ngk Insulators Ltd | Discharging mechanism for molten glass |
| JP3862589B2 (en) * | 2002-04-17 | 2006-12-27 | キヤノン株式会社 | Optical glass outflow device and method of manufacturing optical glass block |
-
2013
- 2013-10-18 JP JP2013217103A patent/JP2015078099A/en active Pending
-
2014
- 2014-10-16 CN CN201410548777.1A patent/CN104556635A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08188419A (en) * | 1995-01-10 | 1996-07-23 | Olympus Optical Co Ltd | Fused glass-supplying nozzle |
| JP2004339002A (en) * | 2003-05-15 | 2004-12-02 | Canon Inc | Device and method for allowing molten glass to flow out |
| CN1880249A (en) * | 2005-06-06 | 2006-12-20 | Hoya株式会社 | Precision mould-pressing forming prefoamer production method and optical component production method |
| JP2009096684A (en) * | 2007-10-18 | 2009-05-07 | Ohara Inc | Flow passage for flowing-out molten glass |
| CN202089884U (en) * | 2011-06-27 | 2011-12-28 | 山东瑞泰玻璃绝缘子有限公司 | Bowl |
| CN202594944U (en) * | 2012-06-01 | 2012-12-12 | 安徽杜氏高科玻璃有限公司 | Nichrome orifice ring |
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| Publication number | Publication date |
|---|---|
| JP2015078099A (en) | 2015-04-23 |
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