1327991 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種模仁，特別係關於一種複合結構模仁及其製備 方法。 【先前技術】1327991 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a mold core, and more particularly to a composite structure mold core and a method of preparing the same. [Prior Art]
模仁廣泛應用於模壓成型製程，特別係製造光學玻璃產品，如非 球面玻璃透鏡、球透鏡、棱鏡等，採用直接模壓成型（Direct Press-molding)技術可直接生產光學玻璃產品，無需打磨、拋光等後 續加工步驟，可大大提高生產效率及產量，且產品質量好。但直接模 壓成型法對於模仁之化學穩定性、抗熱沖擊性能、機械強度、表面光 滑度等要求非常高。故，模壓成型技術之發展實際上主要取決於模仁 材料及模仁製造技術之進步。對於模壓成型之模仁一般有以下要求： a. 於咼溫時’具有很好之剛性、耐機械衝擊強度及足夠之硬度； b. 於反復及快速加熱冷卻之熱衝擊下模仁不產生裂紋及變形； c. 於高溫時模仁表面與光學玻璃不發生化學反應，不黏附玻璃； d. 不發生高溫氧化； e. 加工性能好，易加工成高精度及高表面光潔度之型面； f. 成本低。Molding is widely used in the molding process, especially in the manufacture of optical glass products, such as aspherical glass lenses, ball lenses, prisms, etc. Direct die-molding technology can directly produce optical glass products without grinding or polishing. After the subsequent processing steps, the production efficiency and output can be greatly improved, and the product quality is good. However, the direct compression molding method requires very high requirements for chemical stability, thermal shock resistance, mechanical strength, and surface smoothness of the mold. Therefore, the development of compression molding technology actually depends mainly on the improvement of mold material and mold manufacturing technology. For molded parts, the following requirements are generally met: a. It has good rigidity, mechanical impact strength and sufficient hardness at the temperature of buckling; b. No cracks in the mold under the thermal shock of repeated and rapid heating and cooling And deformation; c. At high temperature, the surface of the mold does not chemically react with the optical glass, and does not adhere to the glass; d. does not undergo high temperature oxidation; e. has good processing performance and is easy to process into a high precision and high surface finish profile; . low cost.
傳統模仁大多採用不銹鋼或耐熱合金作為模仁材料這種模仁容 易發生高溫氧化’於反魏沖擊側下，會發生晶粒長大，從而模仁 表面變粗糙，黏結玻璃。 為解決上述問題，非金屬及超硬合金被用於模仁。據報導，碳化 石夕(SiC) ’氮切⑸⑹，碳化敛(TiC)，碳化鴒㈣及竣化鶴始合金 已經被=於製造模卜惟，上述各種碳化物陶級度非常高，很難加 、所兩要之外开），特別係尚精度非球面形。而超硬合金除難以加工 之外’使用-段觸之後還可能發生高溫氧化。 5 i 美國專利第4, 685, 948號。 美國專利第4, 685, 948號揭示-種麟直麵縣型光學玻璃產 之複S結構模仁。其採用尚強度之超硬合金(sUper_hard Alloy)、 破化物陶竟或金屬陶究（cermet)作為模仁基底，並於模仁之模壓面形 成有銀(Ir)薄膜層，或Ir與麵(Pt)、銖版）、餓(〇s)、錄⑽)或釕(㈤ 之合金薄膜層，或RU薄膜層，或Ru與pt、Re、〇s、肋之合金薄膜層。 通過所述薄膜層可有效防止模仁基底發生高溫氧化。 然而’上述複合結構模仁之模仁基底硬度很高，其模壓面形狀通 吊舄要通過金剛石切削工具（Diamond Cutting Tool)加工，製程較為 複雜且表面粗糖度較差，不利於脫模。 有鑑於此，提供一種製程簡單且易脫模之模仁實為必要。 【發明内容】 為解決先前技術之模仁製程較為複雜且表面粗糙度較差，不利於 脫模之問題，本發明之目的在於提供一種製程簡單且易脫模之模仁及 其製備方法。 為實現本發明之目的，本發明提供一種複合結構模仁，其包括： —模仁基體’其具有—與欲模壓產品相對應之模壓面；其中所述 模仁基體孔隙中具有潤滑劑，所述潤滑劑用作脫模時的脫模劑，且所 述模仁基體一部分係由碳化鎢微粒(wc)及貴金屬微粒(N〇ble Metaly^ 合燒結之燒結物製成。 所述燒結物中混合貴金屬微粒之質量百分比為1~25%，優選為 H3%。 所述貴金屬微粒包括鉑（pt)、銖(Re)、鉑铑合金(ptnRhn)、銖銥合 金(RexIry)或麵銀合金(ptnIrn)微粒；其中，χ值介於〇 25與〇 55之間， y值介於0.45與0. 75之間，m值及η值滿足關係式m+n=i〇〇及i〇<m<9〇。 優選’所述由碳化鎢微粒及貴金屬微粒混合燒結之燒結物製成部 分位於靠近模壓面部分。 所述模仁基體之另一部分亦係由礙化鶴微粒及貴金屬微粒混合燒 結之燒結物製成。 優選，所述模仁細之另-部㈣由碳化錢錄結物製成β 所述潤滑劑包括礦物油及動植物油。 為實現本發明之另-目的，本發明提供—種複合結構模仁之製備 方法’其包括： 提供一燒結用模具，其具有所需模仁之形狀； 將碳化驗粒及貴金射錄之混合材料置於所職模具中， 並進行燒結職-模仁基體，其具有-與欲模壓產品姆應之模壓面。 將所述模仁基體浸於糧射，制滑趣充於所述模仁基體之 孔隙。 所述混合材料中貴金屬微粒之質量百分比為125%，優選為113%。 所述貴金>1微粒及碳化職粒之粒徑卿為lnm l〇〇nm。 所述貴金屬微粒包脑⑽、銖(Re)、麵合金(ptJ?hn)'鍊銀合 金版也)或錄合金(mrn);其中，x值介於〇. 25與〇· 55之間，y 值介於0.45與0, 75之間，m值及n值滿足關係式赫⑽及胸〈⑽。 優選，所述貴金賴粒僅混合於所賴仁基體巾靠近驢面部分。 所述潤滑劑包括礦物油及動植物油。 .$於先前技術’本發明之模仁基體採用碳化鶴微粒及貴金屬微 而ΐ，製程簡單且該燒結複合結構在具有高強度之同時， 佳之模壓面:另、’所述模仁基體孔隙中之潤滑劑於 簡化壓模製程。賴壓面軸賴劑，從·^無_外添加脫模劑， 【實施方式】 下面將結合附圖對本發明作進一步之詳細說明。 產。:π二本發明之第一實施例提供-種用於模壓光學玻璃 產时之複〜·^構換仁1Q ’包括—模仁基體⑽盆且有—盘欲 述模仁基體100孔隙103中具有潤滑劑(未 所述混合燒結之燒結物中混合責金屬微粒m之質量百分比為 1327991 1〜25%，優選為ι~ΐ3%。 所述貴金屬微粒ιοί包括銘(Pt)、銖(如）、鉑铑合金(PtmRhn)、鍊 銥合金(RexIry)或錄合金(PtJn)難；其巾，χ值介㈣25與〇 55 之間，y值介於0. 45與0· 75之間，m值及η值滿足關係式_=1〇 10<m<90 。 所述潤滑劑包括礦物油及動植物油，如機油、有機石夕烧等等。 請參閱第二® ’模壓時，如箭頭所示，受壓模壓力及高溫之影響， 所賴仁基體⑽孔隙1G3中之潤滑劑（未標示）可被釋放出來，於模 壓面105形成脫模劑。 ' 請參閱第三圖’本發明之第二實施例提供一種用於模壓光學破璃 產品之複合結構模仁20，其包括一模仁基體2〇〇，其具有一與欲模壓 產品相對應之模壓面205。所述模仁基體2〇〇孔隙2〇3中具有潤滑劑（未 標示）。本實施例與第-實施例不同之處在於，所述模仁基體包括 第-部分210及第二部分220 ’其中僅第-部分210材料為貴金屬微粒 201及碳化鶴微粒202混合燒結之燒結物製成，而第二部分22〇材料為 碳化鎢微粒202燒結而成。 本發明還提供於所述複合結構模仁之製備方法。 請參閱第-圖，本發明提供之第一種方法包括以下步驟： 提=一燒結用模具（圖未示），其具有所需模仁1〇之形狀； 將貴金屬微粒101及碳化鎢微粒1()2之混合材料置於所述燒結用 模具中； 通過施加壓應力使所述貴金屬微粒1〇1及碳化鶴微粒ι〇2之間緊 密冷連接； “燒結所述緊密冷連接之貴金屬微粒101及碳化鶴微粒102形成-杈仁基體100，其具有一與欲模壓產品相對應之模壓面1〇5 ; 將所述模域體浸關_(未標示）t，制·充分填充 所述模仁基體100燒結結構之孔隙103。 所述此a材料中貝金屬微粒之質量百分比為卜烈％,優選為 1 〜13%。 8 1327991 所述貴金屬微粒101及碳化鎢微粒〗02之粒徑範圍為〗nm~i〇〇nm。 所述貝金屬微粒101材料包括鉑（Pt)、銖(Re)、鉑铑合金(ptnRhn)、 銖銥合金(ReJry)或鉑銥合金(Pt„jrn);其中，x值介於〇 25與0. 55之 間，y值介於0.45與0· 75之間，m值及n值滿足關係式m+n=100及 10<m<90 。 • 所述潤滑劑包括礦物油及動植物油，如機油、有機矽烷等等。 一 請參閱第三圖，本發明提供之第二種方法與第一種方法不同之處 在於，將貴金屬微粒201及碳化鎢微粒202之混合材料置於所述燒結 用模具中時，僅於模仁基體2〇〇中靠近模壓面205之第一部分21〇採 • 用貴金屬微粒201及碳化鎢微粒202之混合材料，而第二部分220材 • 料為碳化鶴微粒202。 本發明之模仁，其模仁基體採用碳化鎢微粒及貴金屬微粒混合燒 結而成，製程簡單且具有高硬度，高機械強度之優點，可承受高溫模 壓時產生之壓力及應力。模仁基體混有貴金屬材料，模壓面表面粗糙 度好，易於脫模。另，壓模時，受壓力及高溫之影響，所述模仁基體 • 孔隙中之潤滑劑被釋放出來，於模麼面形成脫模劑，從而不必於壓模 . 擁中額外添加脫模劑，簡化壓模製程。綜上所述，本發明之複合結 構模仁具有高機械強度、易脫模、使用方便等優點。 綜上所述，本發明確已符合發明專利之要件，遂依法提出專利申 • 2 °惟’以上所述者僅為本發明之較佳實施方式，自不能以此限制本 案之申請專利範圍。舉凡熟悉本案技藝之人士援依本發 之等效修佩變化，·涵蓋独下憎專職_。 精神所作 【圖式簡單說明】 第一圖係本發明第一實施例複合結構模仁之結構示意圖' 第=圖係第一圖中複合結構模仁靠近模壓面部分之放大示意圖。 第三圖係本發明第二實施例複合結構模仁之結構示意圖。、θ。 模仁 貝金屬微粒 孔隙 【主要元件符號說明】 10,20 101,201 103,203 100,200 102, 202 105,205 模仁基體 碳化鎢微粒 模壓面 9 1327991 第一部分 210 第二部分 220Most of the traditional mold cores use stainless steel or heat-resistant alloys as the mold material. This mold is prone to high-temperature oxidation. Under the anti-Wei impact side, grain growth will occur, and the surface of the mold will become rough and the glass will be bonded. In order to solve the above problems, non-metal and super-hard alloys are used for the mold core. According to reports, carbon carbide (SiC) 'nitrogen cut (5) (6), carbonization (TiC), tantalum carbide (four) and sputum Heshi alloy have been = in the mold, the above various carbides are very high grade, it is difficult Plus, the two must be opened outside, especially the precision aspherical shape. In addition to being difficult to process, superhard alloys may undergo high temperature oxidation after use. 5 i US Patent No. 4, 685, 948. U.S. Patent No. 4,685,948 discloses a complex S-structured mold core produced by a type of optical glass. It uses a super-hard alloy (sUper_hard Alloy), a broken ceramic or a ceramic cermet as the base of the mold, and forms a silver (Ir) film layer on the molded surface of the mold, or Ir and the surface (Pt ), 铢 )), hungry (〇 s), recorded (10)) or 钌 ((5) alloy film layer, or RU film layer, or Ru and pt, Re, 〇 s, rib alloy film layer. Through the film layer It can effectively prevent high temperature oxidation of the mold base. However, the base of the above-mentioned composite structure mold has high hardness, and the shape of the molded surface is processed by the Diamond Cutting Tool. The process is complicated and the surface roughness is coarse. Poorly, it is not conducive to demoulding. In view of this, it is necessary to provide a mold which is simple in process and easy to demould. [Invention] In order to solve the prior art, the mold process is complicated and the surface roughness is poor, which is not conducive to demoulding. The problem of the present invention is to provide a mold core which is simple in process and easy to demould and a preparation method thereof. For the purpose of the present invention, the present invention provides a composite structure mold core comprising: - a mold base body Having a molding surface corresponding to the molded product to be molded; wherein the mold core has a lubricant in the pores, the lubricant is used as a releasing agent during demolding, and a part of the matrix of the mold is composed of tungsten carbide particles (wc) and noble metal particles (N〇ble Metaly^ sintered sintered material. The mass percentage of the noble metal particles mixed in the sintered material is 1 to 25%, preferably H3%. The noble metal particles include platinum (pt ), bismuth (Re), platinum-rhodium alloy (ptnRhn), bismuth alloy (RexIry) or face silver alloy (ptnIrn) particles; wherein χ value is between 〇25 and 〇55, y value is between 0.45 and 0 Between 75, the value of m and the value of η satisfy the relationship of m+n=i〇〇 and i〇<m<9〇. Preferably, the sintered body made of the mixture of tungsten carbide particles and noble metal particles is partially formed. Close to the molding surface portion. The other portion of the matrix of the mold core is also made of a sintered sintered body of the abrasive particles and the noble metal particles. Preferably, the other part of the mold core is made of carbonized money. The lubricant of β includes mineral oil and animal and vegetable oil. To achieve the other purpose of the present invention, The invention provides a method for preparing a composite structure mold core, which comprises: providing a sintering mold having a shape of a desired mold core; placing a carbonized inspection particle and a precious gold recording mixed material in a mold and sintering a job-matrix matrix having a molded surface of a molded product to be molded. The matrix of the mold is immersed in a grain of light, and the sliding is filled with the pores of the matrix of the mold. The noble metal particles in the mixed material The mass percentage is 125%, preferably 113%. The particle size of the precious gold > 1 particle and the carbonized grain is 1 nm l 〇〇 nm. The noble metal particle brain (10), bismuth (Re), surface alloy (ptJ?hn) 'chain silver alloy plate also) or recorded alloy (mrn); where x value is between 〇. 25 and 〇· 55, y value is between 0.45 and 0, 75, m value and The n value satisfies the relationship between He (10) and chest (10). Preferably, the precious gold granules are only mixed with the lining body towel adjacent to the kneading portion. The lubricants include mineral oils and animal and vegetable oils. . . . in the prior art 'the mold base of the present invention uses carbonized crane particles and precious metals to be micro-twisted, the process is simple, and the sintered composite structure has high strength, and the molded surface is good: another, the mold core matrix pores The lubricant is used to simplify the molding process. The present invention will be further described in detail below with reference to the accompanying drawings. Production. : π 二 The first embodiment of the present invention provides a kind of embossing optical glass for the production of the tempering of the tempering of the tempering body 1Q 'including the mold core body (10) basin and having a disk to be described in the matrix of the matrix 100 It has a lubricant (the mass percentage of the mixed metal particles m in the sintered mixture which is not described in the mixed sintering is 1327991 1~25%, preferably ι~ΐ3%. The precious metal particles ιοί include Ming (Pt), 铢 (如) , Platinum-rhodium alloy (PtmRhn), bismuth alloy (RexIry) or recorded alloy (PtJn) is difficult; its towel, χ value (4) between 25 and 〇55, y value between 0. 45 and 0 · 75, m The value and the value of η satisfy the relationship _=1〇10<m<90. The lubricant includes mineral oil and animal and vegetable oils, such as motor oil, organic stone burning, etc. Please refer to the second® 'molding, as indicated by the arrow It is shown that the lubricant (not labeled) in the pores 1G3 of the lining matrix (10) can be released by the pressure of the stamper and the high temperature, and a mold release agent is formed on the molding surface 105. 'Please refer to the third figure'. A second embodiment provides a composite structural mold core 20 for molding an optical glass breaking product, comprising a mold base 2, There is a molding surface 205 corresponding to the molded product to be molded. The mold base 2 has a lubricant (not labeled) in the pore 2〇3. This embodiment differs from the first embodiment in that the mold The ingot body includes a first portion 210 and a second portion 220' wherein only the first portion 210 material is made of a mixed sintered sintered body of the noble metal particles 201 and the carbonized crane particles 202, and the second portion 22 is made of a tungsten carbide particles 202 sintered. The invention also provides a method for preparing the composite structure mold core. Referring to the first figure, the first method provided by the invention comprises the following steps:: a sintering mold (not shown) having a A shape of the mold core is required; a mixed material of the noble metal particles 101 and the tungsten carbide particles 1 () 2 is placed in the sintering mold; the noble metal particles 1〇1 and the carbonized crane particles are applied by applying compressive stress 2 tightly cold-bonded between; "sintering the tightly cold-bonded noble metal particles 101 and the carbonized crane particles 102 to form a hazelnut matrix 100 having a molding surface 1〇5 corresponding to the molded product to be molded; Domain body dip _ (not Indicated) t, made to fully fill the pores 103 of the sintered structure of the mold core substrate 100. The mass percentage of the shell metal particles in the a material is Tiru%, preferably 1 to 13%. 8 1327991 The noble metal particles The particle size range of 101 and tungsten carbide particles is 〖nm~i〇〇nm. The shell metal particles 101 material includes platinum (Pt), rhenium (Re), platinum rhodium alloy (ptnRhn), niobium alloy (ReJry). Or a platinum-rhodium alloy (Pt„jrn); wherein the value of x is between 〇25 and 0.55, the value of y is between 0.45 and 0·75, and the value of m and n satisfy the relationship m+n= 100 and 10<m<90. • The lubricants include mineral oils and animal and vegetable oils such as motor oils, organic decanes, and the like. Referring to the third figure, the second method provided by the present invention is different from the first method in that when the mixed material of the noble metal particles 201 and the tungsten carbide particles 202 is placed in the sintering mold, only the mold is used. The first portion of the core substrate 2 is adjacent to the first portion 21 of the molding surface 205. The mixed material of the noble metal particles 201 and the tungsten carbide particles 202 is used, and the second portion 220 is the carbonized crane particles 202. In the mold core of the invention, the matrix of the mold core is formed by mixing and sintering tungsten carbide particles and precious metal particles, and has the advantages of simple process, high hardness and high mechanical strength, and can withstand the pressure and stress generated during high temperature molding. The matrix of the mold core is mixed with a precious metal material, and the surface of the molded surface is rough and easy to release. In addition, during the molding, under the influence of pressure and high temperature, the lubricant in the matrix of the mold core is released, and a mold release agent is formed on the mold surface, so that it is not necessary to apply the mold release agent. To simplify the molding process. In summary, the composite structure of the present invention has the advantages of high mechanical strength, easy release, and ease of use. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application cannot be limited thereby. Anyone who is familiar with the skill of this case will be assisted by the equivalent of this issue, including the full-time _. The spirit of the first embodiment is a schematic diagram of the structure of the composite structure mold core of the first embodiment of the present invention. The first figure is an enlarged schematic view of the portion of the composite structure mold core near the molding surface. The third figure is a schematic structural view of a composite structure mold core according to a second embodiment of the present invention. , θ. Molding shell metal particles Pore [Key component symbol description] 10,20 101,201 103,203 100,200 102, 202 105,205 Mold base Tungsten carbide particles Molded surface 9 1327991 Part 1 210 Part 220
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