CN101497491B - Method for manufacturing finished product, method for manufacturing preformed member for precise stamping and method for manufacturing optical element - Google Patents
Method for manufacturing finished product, method for manufacturing preformed member for precise stamping and method for manufacturing optical element Download PDFInfo
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- CN101497491B CN101497491B CN200910008442XA CN200910008442A CN101497491B CN 101497491 B CN101497491 B CN 101497491B CN 200910008442X A CN200910008442X A CN 200910008442XA CN 200910008442 A CN200910008442 A CN 200910008442A CN 101497491 B CN101497491 B CN 101497491B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A method of producing heat moldings (melted glass blocks), a method of producing preformed piece for fine blanking forming by processing the heat moldings obtained by the method, and a method of producing optical element by fine blanking the preformed piece obtained by the method. The method of producing the preformed piece comprises the steps of: applying wind pressure to the melted glass blocks received by the lower die on the lower die for suspending the same, cooling during the movement in the lower die, and adjusting to the determined viscosity; using the upper die in the determined position for drawing the melted glass blocks on the lower die adjusted to the determined viscosity; finally, cooling the drawing products in the movement of the lower die on the lower die, and taking out the drawing products from the lower die at the determined position. Before taking out from the lower die, the moldings are in contraposition with in non-contact in the determined position on the molding face of the lower die, then taking out after contraposition. The invention further provides a method of producing optical element by fine blanking the preformed piece obtained by the method.
Description
Technical field
The manufacture method, the precision stamping that the present invention relates to the thermoforming product are shaped with the manufacture method of performing member and the manufacture method of optical element.
Background technology
Utilize grinding, grind that the method for the glass optical element that the method that forms the optical function face is difficult to produce in batches is known a precision stamping method as producing glass non-spherical lens etc. in batches.In the method, carry out drawing to being known as glass performing member, that be processed to the shape of suitable precision stamping shaping.As the making method of performing member, known have a several different methods, wherein, isolates in right amount from the melten glass that flows out and as fused glass block and before this glass block cooling curing its method that is configured as performing member to be had high productivity.This method is called as the method for hot forming of performing member, make the glass shaping body of the shape that is similar to performing member though utilize method for hot forming, and it is poor to utilize the operation comprise grinding this glass shaping body to be made the productivity ratio aforesaid method of method of performing member, but we can say that productivity compares comparatively excellent with other method.In method for hot forming, for fear of producing fold, hole or crackle at glass surface, Yi Bian on forming mould, to the blast that it applies up its suspension is formed towards glass block ejection gas on one side.(with reference to patent documentation 1～5)
[patent documentation 1] TOHKEMY 2003-95670 communique
[patent documentation 2] TOHKEMY 2004-300020 communique
[patent documentation 3] TOHKEMY 2004-284847 communique
[patent documentation 4] TOHKEMY 2005-272194 communique
[patent documentation 5] TOHKEMY 2007-119335 communique
In method for hot forming, melten glass is flowed out continuously, the fractional melting glass block utilizes a plurality of shaping dies progressive formings successively.In the method that patent documentation 1～4 is put down in writing, not utilize shaping dies the mode that fused glass block carries out punching press is formed.The shaping dies of Shi Yonging only is counterdie herein.Relative therewith, in the method that patent documentation 5 is put down in writing, utilize shaping dies that fused glass block is carried out drawing.Shaping dies as used herein also has patrix except counterdie.
In aforesaid method, the shaping dies (counterdie) of sky is moved into the position that receives fused glass block and made its stop, provide fused glass block in this position to it.The shaping dies that has received fused glass block is sent from above-mentioned position, and the shaping dies of other sky is moved into, stopped then.Fused glass block is taken out from shaping dies after mobile shaping dies is shaped.But, in the method that patent documentation 5 is put down in writing, in mobile way, can utilize patrix to carry out drawing, take out from shaping dies then.Like this, become empty shaping dies (counterdie) and moved into the position that receives fused glass block again, repeat above-mentioned operation.
In order to carry out above-mentioned operation swimmingly, for example there is following method: be configured in a plurality of shaping dies (counterdie) on the turntable and make the rotation of this turntable calibration, in turn each shaping dies is delivered to the stop place of regulation.In the method, be accompanied by shaping dies movement, stop, the glass block on the shaping dies is applied acceleration.Because this acceleration has the horizontal direction component, so glass block rocks at shaping dies.Form with the constant cycle in the mode with turntable calibration rotation under the situation of method of conveying, stop of mould, above-mentioned acceleration was applied on the glass block with the constant cycle, and rocking of glass block becomes big.And if increase the transfer rate of shaping dies in order to boost productivity, then acceleration also can become greatly, thereby has more strengthened rocking of glass block.
In the manufacturing process of any fused glass block that patent documentation 1～5 is put down in writing, in the time will taking out from shaping dies as the glass block of molding, all be to utilize the front end of adsorption nozzle attract to keep glass block and it is taken out from shaping dies.In order to keep continuous production, must utilize the adsorption nozzle front end to attract to keep the operation of glass block reliably, and must can not be damaged to glass block, to improve yield rate.But as mentioned above, glass block rocks at shaping dies, and the attitude of the glass block on the forming face of shaping dies is also unstable.
Summary of the invention
Therefore, the invention reside in provides a kind of precision stamping that obtains to can be used as anticipated shape by the shaping fused glass block to be shaped with the method for the thermoforming product (fused glass block) of performing member, and this method can reliably, can not damaged glass block ground and carries out absorption maintenance to glass block with spray nozzle front end.
Further, the objective of the invention is to, the thermoforming product that utilize aforesaid method to obtain are processed to make precision stamping be shaped with the method for performing member, and the performing member that utilizes above-mentioned each method to obtain is carried out the method that precision stamping is shaped to make optical element.
The present invention is as described below.
[1] a plurality of counterdies that a kind of manufacture method of thermoforming product, the manufacture method of described thermoforming product are used continuously or circulation is intermittently moved comprise following operation:
(1) isolate fused glass block successively from the melten glass of continuous outflow, and receive the fused glass block of separating at prescribed position with above-mentioned a plurality of counterdies,
(2-1) fused glass block that on counterdie counterdie is received on one side applies blast it is suspended, Yi Bian it is cooled off in the movement of counterdie and be adjusted to regulation viscosity,
(3) use patrix that the glass block on the counterdie that is adjusted to regulation viscosity is carried out drawing at prescribed position, then, the drawing product are cooled off in the movement on the counterdie, at counterdie; Perhaps,
(2-2) fused glass block that on counterdie counterdie is received on one side applies blast it is suspended, and it is cooled off on one side in the movement of counterdie, and does not carry out punching press but suspension that utilization is caused by described blast is configured as the shape of regulation with it,
(4) take out from counterdie at drawing product or the molding (2-2) of prescribed position with (3),
It is characterized in that, before taking out from described counterdie, in non-contacting mode the prescribed position on the forming face of described molding and counterdie is carried out contraposition, after contraposition, take out.
[2] according to [1] described manufacture method, wherein,
Described contraposition is non-contactly undertaken by from patrix described molding being applied blast.
[3] according to [1] or [2] described manufacture method, wherein,
Before the drawing in (3), at the prescribed position that drawing is used, make the prescribed position on the forming face of the fused glass block that is adjusted to regulation viscosity and counterdie carry out contraposition non-contactly, after contraposition, use patrix to carry out drawing.
[4] according to each the described manufacture method in [1]～[3], wherein,
The described regulation viscosity of the fused glass block (2-1) is 10
3Pool to 10
4.4The scope of pool.
[5] according to each the described manufacture method in [1]～[4], wherein,
It is that the precision stamping shaping comprises the glass blank that abrasive method is processed into precision stamping shaping usefulness performing member with performing member or utilization that the confession of thermoforming product is processed into.
[6] a kind of precision stamping is shaped with the manufacture method of performing member, and the glass blank that utilizes the operation that comprises grinding at least will utilize [5] described method to produce is processed into precision stamping shaping performing member.
[7] a kind of manufacture method of optical element, the performing member that each described method of utilizing in [1]～[6] is made carries out the precision stamping shaping.
According to the present invention, can provide the method for following manufacturing thermoforming product: need not to make patrix directly to contact with glass block, can make it with respect to shaping dies (counterdie) forming face center relative (make the center of the center of forming face and glass block consistent), not carry out the method that glass block keeps in the absorption of adsorption nozzle front end thereby can reliably, can damage glass block ground.
Further, according to the present invention, can access as precision stamping by above-mentioned manufacture method and to be shaped with performing member also spendable thermoforming product, perhaps can process to make precision stamping shaping performing member to the thermoforming product that utilize aforesaid method to obtain.Further, can carry out precision stamping to the performing member that utilizes above-mentioned each method to obtain and be shaped to make optical element.
Description of drawings
Fig. 1 is an example of the alignment device used among the present invention.
Fig. 2 is the action specification figure of alignment device.
Fig. 3 is the explanatory view of contraposition.
Fig. 4 represents by melten glass be shaped the action of building mortion of performing member with sequential chart.
Fig. 5 is the explanatory view that an example of turntable is shown.
Embodiment
The present invention is the manufacture method of thermoforming product, and a plurality of counterdies that the manufacture method of described thermoforming product is used continuously or circulation is intermittently moved comprise following operation:
(1) isolate fused glass block successively from the melten glass of continuous outflow, and isolated fused glass block received on above-mentioned a plurality of counterdie at prescribed position,
(2-1) fused glass block that on counterdie counterdie is received on one side applies blast it is suspended, Yi Bian it is cooled off in the movement of counterdie and be adjusted to regulation viscosity,
(3) use patrix that the glass block on the counterdie that is adjusted to regulation viscosity is carried out drawing at prescribed position, then, the drawing product are cooled off in the movement on the counterdie, at counterdie; Perhaps,
(2-2) on one side accept fused glass block that mould receives in the counterdie butt joint and apply blast it is suspended, Yi Bian it is cooled off in the movement of counterdie, and do not carry out punching press but the suspension that utilizes described blast to cause is configured as the shape of regulation with it,
(4) take out from counterdie at drawing product or the molding (2-2) of prescribed position with (3),
It is characterized in that, before taking out from described counterdie, carry out the contraposition of the prescribed position on the forming face of described molding and counterdie in non-contacting mode, and taking-up after contraposition.
A plurality of counterdies that the present invention uses continuously or circulation is intermittently moved.Particularly, a plurality of counterdies are configured on the turntable, and make the rotation of turntable calibration so that above-mentioned a plurality of counterdie moves to each stop place synchronously and one by one in batches, can make the counterdie circulation mobile thus.The stop place is prescribed position, is (1) position of receiving isolated fused glass block, (2) at least with molding from position that counterdie takes out.But, according to the difference of the quantity of the counterdie that arranges on the turntable, also can have the stop place that does not have special action or operation.Even mould carries out under the situation of drawing in the use, also has the position of using patrix to carry out drawing as the stop place.
Isolate fused glass block successively from the melten glass that flows out continuously, and received the fused glass block of separating by a plurality of counterdies at prescribed position.Thus, from the fused glass block that flows out continuously be formed for successively the being shaped fused glass block of hot press-formed article.Melten glass for example by frit is heated, fusion, deaeration, homogenizing obtains, this melten glass is flowed out from pipeline continuously with constant take-off rate, and the bottom of the molten glass flow that flows out is received on the counterdie that is placed on the pipeline below, further, counterdie is descended rapidly towards vertical below, molten glass flow bottom on the counterdie is separated with molten glass flow, receive the fused glass block on the molding surface that is separated to above-mentioned counterdie.
Except this method, also can use following method to obtain fused glass block in the forming face of counterdie: to utilize the supporting mass that places the pipeline below to receive the bottom of the molten glass flow that flows out, and supporting mass is vertically descended rapidly, make the molten glass flow bottom on the supporting mass separate with molten glass flow, provide method to the forming face of counterdie with above-mentioned isolated fused glass block; Perhaps, utilization places the supporting mass of pipeline below to receive the bottom of the molten glass flow that flows out, and the supporting of promptly removing supporting mass, to be separated with molten glass flow by the molten glass flow bottom of supporting mass supporting, and provide method to the forming face of counterdie etc. with above-mentioned isolated fused glass block.
For the fused glass block that is received on the counterdie, on counterdie it applied blast it is suspended on one side, in the movement of counterdie, cool off on one side.Modulating under the situation of drawing product through operation (2-1) and (3), in the movement of counterdie, cooling off and be adjusted to regulation viscosity.In this case, the forming face of counterdie become should the surface by punching press shape transferred thereon to forming face on glass, be level and smooth face, and, also be provided with ejection and be used for fused glass block is applied a plurality of gas vents that blast makes the gas of its suspension.And, modulating under the situation of molding in the mode of not carrying out punching press through operation (2-2), on one side applying blast and make its suspension being received in fused glass block on the counterdie on the counterdie, in the movement of counterdie, cool off on one side, and do not carry out punching press but utilize the formed suspension of described blast to be configured as the shape of regulation.In this case, forming face for counterdie, needn't form though do not carry out stamping procedure should the surface shape transferred thereon to forming face on glass, but because glass block contacts with this face with understanding temporary transient or moment, therefore also be level and smooth face, and, also be provided with ejection and be used for fused glass block is applied a plurality of gas vents that blast makes the gas of its suspension.
Usually, when making the thermoforming product from fused glass block, can prevent and the temperature of the adhesion of fused glass block that then the temperature head of fused glass block and shaping dies is very big if the temperature of shaping dies remained.Like this, if fused glass block directly contacts with the shaping dies that temperature remains below the melten glass deblocking temperature, then glass contact part by part cooling, shrink, therefore exist glass surface fold to occur and can't obtain having the danger of the thermoforming product of smooth-flat-surface.In addition, if the glass after temperature reduces directly contacts with shaping dies, also can cause glass breakage because of the phenomenon that is called as cooling crack sometimes.Therefore with respect to this, the shaping that suspends in the present invention can reduce contacting of glass and counterdie, can avoid the problems referred to above.
As the gas from above-mentioned gas ejiction opening ejection, the preferred gas that uses not with glass reaction particularly, can list air, nitrogen, rare gas element etc.And preferably the amount of this gas, pressure determine in the following manner: fused glass block is suspended be shaped, and can guarantee can not take place the stable status of the adhesion of fused glass block and counterdie on forming face.Can suitably regulate pressure, the flow of the gas of ejection according to the capacity of the glass block that is shaped.Particularly, for example, the scope that preferred described pressure is 0.3～0.5MPa, the flow of described gas are the scope of 0.25～0.45 liter of per minute.
Below, the surface up of the glass block on the forming face is defined as upper surface, will be defined as lower surface with the opposed face of forming face.
The glass block that is provided to the forming face of counterdie cools off under suspended state, in operation (2-1) it is carried out viscosity adjustment, so that it becomes the regulation viscosity that is suitable for drawing.From than being easier to the viewpoint that drawing is anticipated shape, the viscosity of the fused glass block of preferable separation (regulation viscosity) cooling is adjusted to 10
3Pool to 10
4.4Pool.
In operation (3), use patrix that the fused glass block that is adjusted to regulation viscosity in the operation (2-1) is carried out drawing.
Drawing makes at the patrix of standby above the counterdie and descends and with counterdie the glass block on the forming face is carried out that punching press carries out.Coming molding glass piece integral body with punching press when, the forming face of patrix is transferred on the upper surface of glass block, and the forming face surface transfer of counterdie is to the glass block lower surface.The periphery of the periphery of counterdie upper surface and patrix lower surface for example forms chimeric structure, before drawing, make counterdie and patrix chimeric so that contraposition is carried out at the center of counterdie forming face and the center of patrix forming face, make simultaneously counterdie forming face and patrix forming face over against, then glass block is carried out punching press.At this moment, the pressure of gas that is provided to the gas vent of counterdie is set to the degree that does not make glass enter gas vent, and on glassly also can depression not occur because of gaseous tension.After drawing, make glass from last moulding/demoulding, and patrix is kept out of the way to the top.Then, make glass block further cooling under the state that the counterdie forming face suspends after the shaping.
As mentioned above, in operation (3), use patrix to carry out drawing, be preferably and make it the prescribed position before drawing, used in drawing, carry out contraposition non-contactly with prescribed position on the forming face of counterdie, and after contraposition, use patrix to carry out drawing.And the contraposition non-contactly between the fused glass block can be undertaken by from upside (perhaps aligning parts) fused glass block being applied blast.The ejection gaseous tension of this moment for example is preferably the scope of 0.15～0.5MPa, and the ejection gas flow for example is preferably the scope of 0.15～0.45 liter of per minute.
In the movement of the counterdie in the operation (2-2), Yi Bian to fused glass block on one side with blast make it the to suspend cooling carried out and do not carry out punching press but utilize the suspension due to the blast and be configured as the regulation shape and can be undertaken by following manner.
For example, there is following method: use with porous material as counterdie to form for the recess of glass block mounting and the shaping mould by porous material ejection gas, by gushing out of described gas the glass block on the recess is applied the method that blast makes its suspension; Perhaps use the shaping dies that has the gas vent that is formed by a plurality of pores in the recess of mounting glass block, gushing out by the gas from described pore applies blast to the glass block on the recess and makes method of its suspension etc.
The gas that sprays towards the top from the gas vent that is used for suspending can be clean nitrogen, air or rare gas element.The flow of ejection gas for example can be set at the value of enough keeping the stable suspended state of glass block in the recess of shaping dies.The glass block of soft state is configured as the glass block of anticipated shape in the process that the recess of shaping dies cools off, solidifies.
Further, provide to the temperature of the gas of gas vent need be careful following some regulate.At first, its temperature can not make shaping mould be heated because of ejection gas, avoids the recess adhesion of melten glass and shaping dies.Therefore, preferably the temperature of supply gas is set at below 300 ℃.Preferably according to the temperature of adjustments of gas in-50～300 ℃ scope such as the character of the glass of shaping object, weight of performing member.
In addition because shaping dies recycles, therefore, for the temperature that prevents shaping dies owing to the thermal conduction from glass is risen, the mechanism of cooling forming mould also can be set.
Like this, in operation (3) or operation (2-2), the thermoforming product of the rotation symmetric shape that can be shaped successively.In operation (3) or operation (2-2), the molding that is cooled to specified temperature is taken out from the counterdie forming face, also can impose annealing operation to it.
In the present invention, before taking out from the counterdie forming face, make the prescribed position on the forming face of molding and counterdie carry out contraposition non-contactly, after contraposition, take out.Can be undertaken by from upside (perhaps aligning parts) molding being applied blast with the contraposition non-contactly of molding.The ejection gaseous tension of this moment for example is preferably the scope of 0.15～0.5MPa, and the ejection gas flow for example is preferably the scope of 0.15～0.45 liter of per minute.
Below, the contraposition to above-mentioned molding describes with reference to accompanying drawing.
To be arranged on the front end of the pivot arm 10 of alignment device by the aligning parts 11 that porous insert constitutes as shown in Figure 1.Form concave surface with the aligning face 11a of forming face 21 opposed aligning parts 11, and bigger than the upper surface of molding G, form the size in the whole zone of upper surface that can drape forming face G.Processes such as air, nitrogen, rare gas element are arranged on the back side 11b (the inside of aligning face 11a) that the interior gas flow path 15 of pivot arm is provided to aligning parts 11.Air, nitrogen, rare gas element etc. spray from aligning face 11a equably through the aligning parts 11 of porous insert.Utilize lifting device 13 that the part till 12 the axle is descended in this position, carry out aligning thus.
The action specification figure of alignment device shown in Fig. 2.In (A), carry out contraposition in the mode that is just going up at the center of the forming face that is centered close to counterdie 20 21 of aligning face 11a.In (B), under this state, make lifting device 13 actions of alignment device, aligning parts 11 are moved, so that aligning face 11a is near the upper surface of the molding G of forming face towards vertical below.
By this operation, shown in Fig. 2 (A), if molding G from the central offset of forming face 21, then is being offset side, the upper surface of molding G is nearer than its opposition side with the distance of aligning face 11a.Like this, the suffered blast from the gas of aligning face 11a ejection of molding G is bigger in the skew side of molding G, thereby it is consistent with the center of forming face 21 to make molding G return the center of center, molding G of forming face 21.After like this position of the molding G on the forming face 21 of counterdie 20 being corrected, the lifting device 13 of alignment device is moved so that aligning parts 11 rise, and make pivot arm 10 rotations so that aligning parts 11 are kept out of the way from the counterdie top.Also can be suppressed at rocking of the molding that rocked in the suspension process by so a series of operation.
Next, shown in (C), make the front end of the attraction nozzle 31 that the front end place of the conveying mechanical arm 30 of standby above shaping dies 20 arranges near the upper surface of molding G, molding G is attracted to remain on the front end that attracts nozzle 31, and take out from shaping dies 20.Molding G after the taking-up can suitably anneal.
The aligning operation is preferably carried out the glass block that rests on extracting position.Carry out aligning like this, adsorption nozzle is adsorbed in hermetically carried out aligning, adjusted on the upper surface of the glass block that rocks, can more reliably glass block be taken out from shaping dies.
The pass the imperial examinations at the provincial level shape of the thermoforming product shown in the example of Fig. 3 is that lower surface and upper surface all are the shapes (also can be shaped not use punching press) of convex surface.Even the peripheral part of the thermoforming product on the shaping dies under overlooking does not contact with shaping dies under non-suspended state yet.Because the peripheral part of the molding of this shape can not be subjected to the restriction of shaping dies, therefore when carrying shaping dies, glass block rocks easily, easy tram skew from the recess of shaping dies.Like this, but the present invention is particularly useful for making and has under non-suspended state lower surface contacts the shape that peripheral part do not contact with shaping dies with shaping dies thermoforming product.
Other shape as the thermoforming product, it is convex surface that lower surface can be shown for example, upper surface is the hot press-formed article of the rotation symmetric shape on plane, lower surface is convex surface, upper surface is the hot press-formed article of the rotation symmetric shape of concave surface, lower surface is convex surface, upper surface is plane and the different shapes such as hot press-formed article that have the rotation symmetric shape of recess in central authorities, but be concave surface for being used for the aligning face that hot press-formed article to these shapes carries out the position mandatory component of aligning, and form the size in whole zone that can cover glass piece upper surface.Each thermoforming product does not all have breakages such as cooling crack, can access high-quality molding.
The thermoforming product can be precision stamping shaping performing members, or are processed into the glass blank that performing member is used in the precision stamping shaping by comprising abrasive method.Be to be processed into precision stamping and to be shaped under the situation with the glass blank of performing member by comprising abrasive method at the thermoforming product, the glass blank of making is processed into the precision stamping shaping by the operation that comprises grinding at least uses performing member, can make precision stamping shaping performing member.After the thermoforming product are annealed, can grind to be finish-machined to performing member to the surface.Because the shape of hot press-formed article is the rotation symmetric shape, therefore can utilize grinding easily to make the performing member of rotation symmetric shape.
Further, be shaped by the performing member that utilizes method of the present invention to make is carried out precision stamping, also can make optical element.With the be shaped manufacturing of the optical element carry out of precision stamping, can utilize known method to implement.Can be shaped to make various non-spherical lenses such as concavees lens, convex lens, biconcave lens by performing member is carried out precision stamping.The lens that obtain like this have excellent surface accuracy, unfavorable conditions such as uneven thickness can not occur.
[embodiment]
Below, utilize embodiment to further describe the present invention.
Embodiment
Come embodiment is described in conjunction with Fig. 3.Using following forming mill, is the forming mill that equally spaced disposes 12 counterdies on the circumference centered by the turning axle of the turntable that rotates by calibration.
Fig. 4 represents from the action of the building mortion of melten glass shaping performing member with sequential chart.
The action of said apparatus is divided into following mechanism for convenience of explanation: make the upper die and lower die knee-action with mechanism's (device name " melten glass separation ") of fractional melting glass; Make mechanism's (device name " forming mill calibration ") of the turntable calibration rotation of carrying counterdie; Utilize mechanism's (device name " adsorption nozzle ") of the glass block of negative-pressure adsorption curing; Have the glass block that will solidify and take out and be delivered to mechanism's (device name " e Foerderanlage ") of the adsorption nozzle that has negative pressure mechanism of annealing operation from shaping dies; The mechanism of ejection gas from porous insert, thereby non-contactly with the prescribed position contraposition (device name " aligning parts ") on the forming face of the glass block that solidifies and counterdie; Make patrix from the mechanism of just keeping out of the way (device name " device for aligning 90 degree revoliving arms ") of counterdie stop place; And make above-mentioned porous insert mechanism that above-below direction moves (device name " device for aligning descends and uses cylinder ").
Sequential chart is gone up the open and close of main switch of device name " forming mill startup " the expression building mortion integral body on hurdle most.Be that device name " forming mill startup " starts building mortion from closing to become at first.
The moment that makes turntable calibration shown in Figure 5 rotation and turntable is stopped to be as starting point, with described turntable carry out next calibration rotation, timing definition till turntable stops is a productive temp, represents with h.That is, productive temp be equivalent to from counterdie stop at the stop place begin to move to next stop place and stop till time.In the present embodiment, a productive temp is set at 6920 milliseconds.
When counterdie stop at outflow melten glass below, be stop place 1 (prescribed position) after, make device name " melten glass separations " become unlatching from closing, make the counterdie rising and remain on hoisting position, receive the lower end of melten glass.The melten glass of Liu Chuing is stored on the counterdie continuously, between the outlet of the glass flows of melten glass and counterdie because surface tension produces necking down.
" melten glass separation " become from unlatching close through when 6120 milliseconds stopping to begin from above-mentioned turntable, counterdie is descended rapidly, the melten glass of below separates and can obtain fused glass block at counterdie from above-mentioned necking section.Next, make " forming mill calibration " become unlatching from closing, make turntable center on 30 ° of turning axle rotations and stop.
In the present embodiment, begin the 9th stop place 10 (extracting position) in the position from the reception fused glass block and carry out the contraposition of glass block.After starting forming mill, carry out the melten glass separating action 9 times, the shaping dies that calibration is calculated 10 stops in the stop place.After the time of 30m second (millisecond), make " device for aligning descends and uses cylinder " decline 480m second (millisecond).At 30+480=510m second (millisecond) afterwards, close " device for aligning descend use cylinder " thus make the aligning parts rise to original height, stop at extracting position 530m at counterdie and open " device for aligning 90 degree revoliving arms " after second, the arm 10 that makes the holding position correct parts turns round 90 °, makes the aligning parts move, keep out of the way towards horizontal direction from the extracting position top.Like this, make aligning parts and maintenance thereof, travel mechanism can not hinder the taking-up of performing member, make the adsorption nozzle of e Foerderanlage move to above the shaping dies and produce negative pressure after second at 570m and adsorb performing member and it is delivered to annealing operation.
Close " device for aligning 90 degree revoliving arms " then, make the aligning parts return the extracting position top.Then, " forming mill calibration " opened, made turntable turn over 30 °, make each counterdie move to next stop place.
Carry out this action repeatedly, to performing member carry out aligning and successively absorption solidification glass block it is delivered to annealing operation.
Device name " device for aligning 90 degree revoliving arms " is the pivot arm shown in 10 among Fig. 1.Be under the closing state at this arm, aligning parts (porous insert) 11 are positioned at the extracting position top.It is the state shown in Fig. 2 (A).If open " device for aligning descends and uses cylinder " under this state it is descended, the aligning parts that then spray gas descend, and near the glass block on the counterdie molding are carried out contraposition non-contactly.It is the state shown in Fig. 2 (B).Open the moment of " device for aligning descends and uses cylinder " for to stop at extracting position 30m second (millisecond) afterwards from counterdie.Stop at extracting position 30+480=510m second (millisecond) afterwards at counterdie, close " device for aligning descends and uses cylinder " so that the aligning parts rise to original height, stop at extracting position 530m after second at counterdie, open " device for aligning 90 degree revoliving arms ", the arm 10 that makes the holding position correct parts turns over 90 °, makes the aligning parts move, keep out of the way out from extracting position top along continuous straight runs.Make aligning parts and maintenance thereof, travel mechanism not hinder taking-up like this, and absorption molding upper surface is mentioned it towards the top.It is the state shown in Fig. 2 (C).
After the taking-up, move it to annealing (Xu Leng) operation and make its Xu Leng.Becoming empty counterdie again to taking out molding provides fused glass block to form.
The performing member of the rotator shape that upper surface is flat, lower surface is convex surface so just is shaped.In the state of Fig. 2 (C), by in advance with the center indication of the adsorption nozzle 31 of the e Foerderanlage 30 of molding at the center of shaping dies, can be implemented in and can both adsorb in hundreds of times the actions that to utilize device for aligning that aligning can not taken out to the performing member at the center of shaping dies bad etc.
So the performing member that obtains carries out the non-spherical lens that the uniform convex lens shape of thickness is produced in the precision stamping shaping by known method.
(comparative example)
" device for aligning 90 degree revoliving arms " opened all the time, except making the state that the aligning parts keep out of the way from the stamping position top, utilized that condition shaping upper surface same as the previously described embodiments is flat, lower surface is the performing member of convex surface.Carry out with respect to shaping dies at performing member under the state before the aligning of Fig. 3, the adsorption nozzle 31 of e Foerderanlage 30 descends, and can press taking-up condition of poor under the state of performing member with the edge that a side of adsorption nozzle appears in considerable frequency.In the glass material of implementing, then damage do not occur at the performing member upper surface, but might produce damage because of this push action according to the kind difference of glass material.
[utilizability on the industry]
In the manufacturing field of optical elements such as glass lens, be useful.
Claims (7)
1. the manufacture method of thermoforming product, the manufacture method of described thermoforming product are used continuously or mobile a plurality of counterdies of circulation intermittently, comprise following operation:
(1) isolate fused glass block successively from the melten glass of continuous outflow, and receive the fused glass block of separating at prescribed position with above-mentioned a plurality of counterdies,
(2-1) fused glass block that on counterdie counterdie is received on one side applies blast it is suspended, Yi Bian it is cooled off in the movement of counterdie and be adjusted to regulation viscosity,
(3) use patrix that the glass block on the counterdie that is adjusted to regulation viscosity is carried out drawing at prescribed position, then, the drawing product are cooled off in the movement on the counterdie, at counterdie; Perhaps,
(2-2) fused glass block that on counterdie counterdie is received on one side applies blast it is suspended, and it is cooled off on one side in the movement of counterdie, and does not carry out punching press but suspension that utilization is caused by described blast is configured as the shape of regulation with it,
(4) take out from counterdie at drawing product or the molding (2-2) of prescribed position with (3),
The manufacture method of these thermoforming product is characterised in that, before taking out from described counterdie, prescribed position on the forming face of counterdie, use has opposed and cover the aligning parts of aligning face in the whole zone of upper surface of described molding with described molding, apply blast from the aligning of described aligning parts in the face of described molding, make the center of described molding and described counterdie carry out contraposition non-contactly thus, after contraposition, take out described molding.
2. manufacture method according to claim 1, wherein,
Described contraposition is non-contactly undertaken by from patrix described molding being applied blast.
3. manufacture method according to claim 1 and 2, wherein,
Before the drawing in (3), at the prescribed position that drawing is used, make the prescribed position on the forming face of the fused glass block that is adjusted to regulation viscosity and counterdie carry out contraposition non-contactly, after contraposition, use patrix to carry out drawing.
4. manufacture method according to claim 1 and 2, wherein,
The described regulation viscosity of the fused glass block (2-1) is 10
3Pool to 10
4.4The scope of pool.
5. manufacture method according to claim 1 and 2, wherein,
The thermoforming product are to comprise the glass blank that abrasive method is processed into precision stamping shaping usefulness performing member for being processed into the precision stamping shaping with performing member or utilization.
6. a precision stamping is shaped with the manufacture method of performing member, and the glass blank that utilizes the operation that comprises grinding at least will utilize the described method of claim 5 to produce is processed into precision stamping and is shaped and uses performing member.
7. the manufacture method of an optical element is carried out precision stamping to the performing member that utilizes the described method of claim 6 to make and is shaped.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008-017136 | 2008-01-29 | ||
| JP2008017136A JP2009179486A (en) | 2008-01-29 | 2008-01-29 | Method for producing hot-molded article, method for producing preform for precision press molding, and method for producing optical element |
| JP2008017136 | 2008-01-29 |
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| CN101497491A CN101497491A (en) | 2009-08-05 |
| CN101497491B true CN101497491B (en) | 2013-08-07 |
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| US8806893B2 (en) * | 2011-02-18 | 2014-08-19 | Hoya Corporation | Manufacturing method of a glass blank for magnetic disk and manufacturing method of a glass substrate for magnetic disk |
| JP5654383B2 (en) * | 2011-02-25 | 2015-01-14 | Hoya株式会社 | Manufacturing method of glass preform for precision press molding and manufacturing method of optical element |
| CN102757168B (en) * | 2011-04-27 | 2016-01-27 | Hoya株式会社 | Precise punch forming preformed glass part manufacture method and Optical element manufacturing method |
| JP6127868B2 (en) * | 2013-09-24 | 2017-05-17 | 日本電気硝子株式会社 | Glass material manufacturing method and glass material manufacturing apparatus |
| JP6641923B2 (en) * | 2015-11-25 | 2020-02-05 | 日本電気硝子株式会社 | Glass material manufacturing method and glass material manufacturing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1535252A (en) * | 2001-10-06 | 2004-10-06 | 舱壁玻璃公司 | Method and device for non-contact moulding of fused glass gobs |
| 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 |
| CN101062827A (en) * | 2006-04-27 | 2007-10-31 | Hoya株式会社 | Method for manufacturing glass shaped object and manufacturing method of optical element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000001321A (en) * | 1998-06-15 | 2000-01-07 | Canon Inc | Method for forming glass gob as glass optical element or blank for producing the same |
| JP2001019444A (en) * | 1999-06-29 | 2001-01-23 | Canon Inc | Formation of optical device |
| JP3712575B2 (en) * | 1999-12-10 | 2005-11-02 | Ｈｏｙａ株式会社 | Glass gob manufacturing method and manufacturing apparatus |
| JP4359169B2 (en) * | 2004-03-24 | 2009-11-04 | Ｈｏｙａ株式会社 | Press molding preform manufacturing method, manufacturing apparatus, and optical element manufacturing method |
| JP4847781B2 (en) * | 2005-07-13 | 2011-12-28 | Ｈｏｙａ株式会社 | Press molding preform manufacturing method and molding apparatus, and optical element manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1535252A (en) * | 2001-10-06 | 2004-10-06 | 舱壁玻璃公司 | Method and device for non-contact moulding of fused glass gobs |
| 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 |
| CN101062827A (en) * | 2006-04-27 | 2007-10-31 | Hoya株式会社 | Method for manufacturing glass shaped object and manufacturing method of optical element |
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| JP2009179486A (en) | 2009-08-13 |
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