JPH0735262B2 - Molding material for glass molding - Google Patents
Molding material for glass moldingInfo
- Publication number
- JPH0735262B2 JPH0735262B2 JP18019489A JP18019489A JPH0735262B2 JP H0735262 B2 JPH0735262 B2 JP H0735262B2 JP 18019489 A JP18019489 A JP 18019489A JP 18019489 A JP18019489 A JP 18019489A JP H0735262 B2 JPH0735262 B2 JP H0735262B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- molding
- boride
- sintered body
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 title claims description 25
- 238000000465 moulding Methods 0.000 title claims description 11
- 239000012778 molding material Substances 0.000 title description 2
- 239000000463 material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- 229910003470 tongbaite Inorganic materials 0.000 claims description 6
- 229910021332 silicide Inorganic materials 0.000 claims description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 5
- OFEAOSSMQHGXMM-UHFFFAOYSA-N 12007-10-2 Chemical compound [W].[W]=[B] OFEAOSSMQHGXMM-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- LGLOITKZTDVGOE-UHFFFAOYSA-N boranylidynemolybdenum Chemical compound [Mo]#B LGLOITKZTDVGOE-UHFFFAOYSA-N 0.000 claims description 4
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims 1
- 238000005245 sintering Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- GVEHJMMRQRRJPM-UHFFFAOYSA-N chromium(2+);methanidylidynechromium Chemical compound [Cr+2].[Cr]#[C-].[Cr]#[C-] GVEHJMMRQRRJPM-UHFFFAOYSA-N 0.000 description 5
- 239000011651 chromium Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 229910016006 MoSi Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910006249 ZrSi Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- 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
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/05—Press-mould die materials
- C03B2215/07—Ceramic or cermets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ガラス成形用型材、特に光学レンズをプレス
成形した後の磨き工程を必要としないガラス成形用型材
に関するものである。Description: TECHNICAL FIELD The present invention relates to a glass molding die, particularly to a glass molding die that does not require a polishing step after press molding an optical lens.
ガラス成形工程においては、供給された軟らかいガラス
はブローやプレスなどの成形を受けながら冷却される。
この工程で重要なことは、軟化したガラスと反応せず、
転写性に優れかつガラス成形面が損傷を受けない型を使
用することである。In the glass forming step, the supplied soft glass is cooled while undergoing forming such as blow or press.
The important thing in this process is that it does not react with the softened glass,
It is to use a mold that is excellent in transferability and does not damage the glass molding surface.
従来、このような条件を満たすべくセラミツクス製の型
については種々検討がなされている。その例として、Si
CやSi3N4の焼結体であるが、これはガラスと反応しやす
い焼結助剤を使うこともあつて十分に目的を達成するこ
とはできない。そこで特公昭63−11285号公報に記載さ
れているように、セラミツク母材に白金合金をコーテイ
ングすることが提案されているが、それでも十分ではな
い。Conventionally, various studies have been made on ceramic molds that satisfy such conditions. For example, Si
Although it is a sintered body of C or Si 3 N 4 , it cannot fully achieve its purpose because it uses a sintering aid that easily reacts with glass. Therefore, as disclosed in Japanese Patent Publication No. 63-11285, it has been proposed to coat a ceramic base material with a platinum alloy, but this is not sufficient.
本発明者は、それをさらに改善すべき種々検討した結
果、ガラスの組成にはいろいろあるがこれらとはほとん
ど反応することがなく、しかも転写性が良好で繰り返し
使用による損傷も極めて少なく、とりわけ、光学レンズ
の型として非常に高度な寸法精度と加工性（研磨性）を
有するセラミツク材料として、タングステンホウ化物及
び／又はモリブデンホウ化物と炭化クロム及び／又は金
属ケイ化物の特定割合からなる混合粉末の焼結体が最適
であることを見い出し、本発明を完成したものである。The present inventor, as a result of various studies to further improve it, have various glass compositions, but hardly react with them, and have good transferability and extremely little damage due to repeated use. As a ceramic material having a very high degree of dimensional accuracy and workability (polishability) as a mold of an optical lens, a mixed powder of tungsten boride and / or molybdenum boride and chromium carbide and / or metal silicide is contained. The inventors have found that a sintered body is optimal and completed the present invention.
すなわち、本発明は、タングステンホウ化物及び／又は
モリブデンホウ化物80〜99重量％と炭化クロム及び／又
は金属ケイ化物20〜１重量％との混合粉末の焼結体から
なることを特徴とするガラス成形用型材である。That is, the present invention comprises a sintered body of a mixed powder of 80 to 99% by weight of tungsten boride and / or molybdenum boride and 20 to 1% by weight of chromium carbide and / or metal silicide. It is a molding material.
以下、さらに詳しく本発明について説明する。The present invention will be described in more detail below.
本発明においては、タングステンホウ化物及び／又はモ
リブデンホウ化物はベース材であり、混合粉末中、それ
らのホウ化物から選ばれた少なくとも１種が80〜99重量
％を必要とする。これらのホウ化物が80重量％未満では
ガラスに対する耐食性が十分でなくなり、また、99重量
％をこえると、炭化クロム及び／又は金属ケイ化物の割
合が１重量％未満となり、焼結体の緻密性が低下する。
炭化クロム及び／又は金属ケイ化物は、上記ホウ化物の
焼結助剤として機能するものであり、それらから選ばれ
た少なくとも１種が使用される。In the present invention, the tungsten boride and / or molybdenum boride is the base material, and at least one selected from the boride in the mixed powder needs to be 80 to 99% by weight. If the content of these borides is less than 80% by weight, the corrosion resistance to glass will be insufficient, and if it exceeds 99% by weight, the proportion of chromium carbide and / or metal silicide will be less than 1% by weight, and the compactness of the sintered body Is reduced.
The chromium carbide and / or metal silicide functions as a sintering aid for the above boride, and at least one selected from them is used.
タングステンホウ化物としては、WB,W2B,WB2,W2B5な
ど、モリブデンホウ化物としては、MoB,Mo2B,MoB2,Mo2B
5など、炭化クロムとしては、Cr3C2,Cr7C3,Cr4C,Cr24C6
など、金属ケイ化物としては、MoSi2,ZrSi2などが使用
される。これらの中で、特に好ましいものは、WB,MoB,C
r3C2,MoSi2である。As tungsten borides, WB, W 2 B, WB 2 , W 2 B 5 , etc.As molybdenum borides, MoB, Mo 2 B, MoB 2 , Mo 2 B
5, etc., as chromium carbide, Cr 3 C 2 , Cr 7 C 3 , Cr 4 C, Cr 24 C 6
As the metal silicide, MoSi 2 , ZrSi 2 or the like is used. Among these, particularly preferred are WB, MoB, C
r 3 C 2 and MoSi 2 .
上記割合からなる混合粉末の好ましい平均粒子径は10μ
ｍ以下であり、それは、平均粒子径10μｍ以下の上記ホ
ウ化物と上記焼結助剤とを乾式法又は湿式法により混合
することによつて得ることができる。得られた混合粉末
は所望形状に成形され焼結される。成形法としては、金
型プレス成形、CIP成形どが採用される。大型形状で保
形が困難なときには、ポリビニルアルコール、ワツク
ス、パラフイン等のバインダーを添加して成形すること
もある。焼結法としては、温度1700〜2100℃で0.5〜12
時間程度の常圧焼結、圧力100〜300Kg/cm2、温度1700〜
2100℃で0.5〜12時間程度のホットプレス焼結、圧力500
〜2000kg/cm2、温度1700〜2100℃で0.5〜12時間程度のH
IP焼結などが採用される。焼成雰囲気としては真空下又
は還元雰囲気下である。The preferred average particle size of the mixed powder in the above proportion is 10μ
m or less, which can be obtained by mixing the boride having an average particle diameter of 10 μm or less and the sintering aid by a dry method or a wet method. The obtained mixed powder is molded into a desired shape and sintered. As the molding method, die press molding, CIP molding and the like are adopted. When it is difficult to maintain the shape due to its large size, a binder such as polyvinyl alcohol, wax, or paraffin may be added for molding. The sintering method is 0.5 to 12 at a temperature of 1700 to 2100 ° C.
Normal pressure sintering for about 100 hours, pressure 100-300Kg / cm 2 , temperature 1700-
2 Hot press sintering at 100 ℃ for 0.5-12 hours, pressure 500
~2000kg / cm 2, of about 0.5 to 12 hours at a temperature 1,700 to 2,100 ° C. H
IP sintering is adopted. The firing atmosphere is a vacuum or a reducing atmosphere.
以上のようにして得られた本発明の焼結体は、研削後、
ダイヤモンド砥粒等により研磨して型形状に加工する。
光学レンズのプレス型の場合には、レンズ面の最大表面
粗さ（Rmax）を0.02μｍ以下になるまで研磨する必要が
ある。さらには、焼結体には少なからずの気孔（数μｍ
〜数十μｍ）が存在するので、それをなくして型精度を
さらに高めたいときには、上記した本発明に係るホウ化
物によりコーテイング膜を焼結体に形成させるのがよ
い。コーテイング（薄）膜の形成手段としては、CVD
法、スパツタリング法、溶融塩による含浸法などがあ
る。The sintered body of the present invention obtained as described above, after grinding,
It is ground into a die shape by polishing with diamond abrasives or the like.
In the case of a press type optical lens, it is necessary to polish until the maximum surface roughness (Rmax) of the lens surface becomes 0.02 μm or less. Furthermore, not a few pores in the sintered body (several μm
.About.several tens of .mu.m), it is preferable to form the coating film on the sintered body by using the boride according to the present invention described above, in order to eliminate it and further improve the mold precision. As a means for forming a coating (thin) film, CVD
Method, spattering method, impregnation method with molten salt, and the like.
以下、実施例と比較例をあげてさらに具体的に説明す
る。Hereinafter, more detailed description will be given with reference to Examples and Comparative Examples.
実施例〜20 比較例１〜６ 表−１に示す平均粒子径２〜３μｍである各粉末の所定
量をボールミルで混合しそれを20φ×5mmtに成形後、真
空雰囲気下、温度1900℃、３時間の常圧焼結を行い、さ
らにアルゴン雰囲気下、圧力1.8ton/cm2、温度1900℃、
１時間のHIP焼結を行つた。得られた焼結体を研磨して
評価試験に供した。Examples to 20 Comparative Examples 1 to 6 A predetermined amount of each powder having an average particle diameter of 2 to 3 μm shown in Table 1 was mixed by a ball mill and molded into 20φ × 5 mmt, and then, in a vacuum atmosphere, at a temperature of 1900 ° C., 3 Time atmospheric pressure sintering, further under argon atmosphere, pressure 1.8ton / cm 2 , temperature 1900 ℃,
HIP sintering was performed for 1 hour. The obtained sintered body was polished and subjected to an evaluation test.
試験に用いたガラスの組成は次のおりである。The composition of the glass used in the test is as follows.
ガラス（Ａ）:SiO245.7％,Na2O3.6％,K2O5.0％,PbO45.7
％ （軟化点670℃） ガラス（Ｂ）:P2O54.4％,Al2O315.2％,MgO4.0％,CaO10.
2％,SrO11.0％,BaO26.6％,La2O32.0％,F26.2％ （軟化点620℃） （評価法） 半径10mm、高さ5mmの円柱状ガラス（Ａ）又は（Ｂ）
を、ラツピングとポリシングによりRmax0.02μｍ以下に
なるまで鏡面研磨してなる円盤型の上にのせ、N2雰囲気
中、各ガラスの軟化点＋30℃の温度で加熱し、ガラスと
型との反応性、転写性及び繰り返し使用による耐久性の
評価を行つた。Glass (A): SiO 2 45.7%, Na 2 O3.6%, K 2 O5.0%, PbO45.7
% (Softening point 670 ° C) Glass (B): P 2 O 5 4.4%, Al 2 O 3 15.2%, MgO 4.0%, CaO 10.
2%, SrO11.0%, BaO26.6% , La 2 O 3 2.0%, F26.2% ( softening point 620 ° C.) (Evaluation Method) radius 10 mm, a cylindrical glass height 5 mm (A) or (B )
Is placed on a disk mold that has been mirror-polished to a Rmax of 0.02 μm or less by lapping and polishing and heated at a temperature of the softening point of each glass + 30 ° C in an N 2 atmosphere to react the glass with the mold. The transferability and the durability by repeated use were evaluated.
ガラスと型との反応性は、型の表面組織を光学顕微鏡観
察により行い、転写性は、ガラスの表面組織を同様に表
面観察することによつて行つた。また、繰り返し使用に
よる耐久性は、前記円盤型の間にガラスを狭み50kg/cm2
でプレスを行い、冷却後、再びガラスを狭んで同様にプ
レスを行う操作を繰り返し100回行つた。The reactivity between the glass and the mold was determined by observing the surface texture of the mold by an optical microscope, and the transferability was determined by similarly observing the surface texture of the glass. Also, the durability by repeated use is that the glass is sandwiched between the disk molds and 50 kg / cm 2
After pressing and cooling, the glass was again narrowed and the same pressing operation was repeated 100 times.
判定は次のとおりである。The judgment is as follows.
（１） 反応性 ◎ 無し 〇 ガラスとの反応（着色、 やや有り △ 発泡など）が 有り × 顕著 （２） 転写性 ◎ 一致 〇 型とガラスの形状（組 かなり一致 △ 織）が やや一致 × 識別不能 （３） 耐久性 ◎ 無し 〇 使用回数によりガラス組 やや有り △ 織・形状の化が 有り × 顕著 〔発明の効果〕 本発明のガラス成形用型材は、従来用いられてきたSiC
やSi3N4の材質に比べてガラスとの反応性、転写性、及
び耐久性に優れている。(1) Reactivity ◎ None 〇 Reaction with glass (colored, slightly present △ Foaming etc.) Yes × Remarkable (2) Transferability ◎ Matched 〇 Shape and glass shape (consistently matched △ Weave) slightly matched × Discrimination Impossible (3) Durability ◎ None 〇 Depending on the number of times of use, there is some glass assembly △ There is some weaving and shape change × Notable [Effects of the Invention] The glass molding mold material of the present invention is a SiC material that has been conventionally used.
It excels in reactivity with glass, transferability, and durability compared with the materials of Si 3 N 4 and Si.
Claims (1)
ンホウ化物80〜99重量％と炭化クロム及び／又は金属ケ
イ化物20〜１重量％との混合粉末の焼結体からなること
を特徴とするガラス成形用型材。1. A glass molding comprising a sintered body of a mixed powder of 80 to 99% by weight of tungsten boride and / or molybdenum boride and 20 to 1% by weight of chromium carbide and / or metal silicide. Mold material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18019489A JPH0735262B2 (en) | 1989-07-14 | 1989-07-14 | Molding material for glass molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18019489A JPH0735262B2 (en) | 1989-07-14 | 1989-07-14 | Molding material for glass molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0345520A JPH0345520A (en) | 1991-02-27 |
| JPH0735262B2 true JPH0735262B2 (en) | 1995-04-19 |
Family
ID=16079042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18019489A Expired - Lifetime JPH0735262B2 (en) | 1989-07-14 | 1989-07-14 | Molding material for glass molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735262B2 (en) |
-
1989
- 1989-07-14 JP JP18019489A patent/JPH0735262B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0345520A (en) | 1991-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0164930B1 (en) | Molding method for producing optical glass element | |
| JPS60127246A (en) | Direct press mold for optical glass lenses | |
| KR950009986B1 (en) | Ceramic die for molding glass member | |
| EP0284418B1 (en) | Ceramic products and process for producing the same | |
| JP2008007400A (en) | Mold for glass hard disk substrate | |
| JPH0247411B2 (en) | KOGAKUGARASUSOSHINOPURESUSEIKEIYOKATA | |
| US5407750A (en) | High purity dense silicon carbide sintered body and process for making same | |
| JPH05254853A (en) | Mold for press-forming | |
| JPH0688803B2 (en) | Mold for optical glass element | |
| JPH0379299B2 (en) | ||
| JPH0345520A (en) | Glass-molding mold | |
| JP4822534B2 (en) | Manufacturing method of ceramics | |
| JPH11255523A (en) | Mold for forming glass mold and its production | |
| KR870001737B1 (en) | Mold for direct press molding of optical glass elements | |
| JPH0572336B2 (en) | ||
| JP3605774B2 (en) | Glass press mold | |
| JPH0361614B2 (en) | ||
| JP2000072453A (en) | Forming mold for glass mold and its production | |
| JPS6296331A (en) | Method for molding optical glass elements and mold for molding the same | |
| JPH01313337A (en) | Mold material and mold for molding glass | |
| JP2762421B2 (en) | Mold for molding optical parts with excellent surface accuracy and method of manufacturing the same | |
| JPH107424A (en) | Glass mold | |
| JPH05237827A (en) | Mold and its manufacture | |
| JPS60176929A (en) | Mold for press molding glass lens | |
| JPS6311285B2 (en) |