TWI329620B - Mold for molding glass optical articles - Google Patents

Description

1329620 On June 11, 099, the shuttle is replacing the page. 6. Description of the invention: [Technical field to which the invention belongs].

[0001] The present invention relates to a mold, and more particularly to a glass forming mold [Prior Art] [0002] a molding process for a glass product, particularly an optical glass product, such as an aspherical glass lens, a ball lens, a prism, and the like. The direct press-molding technology can directly produce optical glass φ products without the need for subsequent processing steps such as grinding and polishing, which can greatly improve production efficiency and output, 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 mold release properties of the mold. A molding apparatus and method using a mold made of glassy carbon is disclosed in U.S. Patent No. 3,844,755. However, due to the weak structural strength of the glassy carbon material, the mold is prone to cracks during the molding process, resulting in deformation of the mold surface or a decrease in surface finish, which affects the quality of the product or even the scrapping of the mold. The development of the molding technology is practical. The main depends on the progress of the mold material and the mold structure. The molds for compression molding generally have the following requirements: Country a. * At high temperatures, it has a very good rigid mechanical impact strength and sufficient hardness; just b. (four) complex and fast Fan heating and cooling "Cracks and deformation under thermal shock; [0005] c. At 13⁄4 temperature, the mold surface and optical glass are attached; the glass does not react chemically, does not stick to 094106552 Form No. A0101 Page 3 of 16 Page 0993206183-0 1329620 June 11, 099 nuclear replacement page [0006] d. no high temperature oxidation; [0007] e. good processing performance, easy to process into high precision and high surface finish profile [0008] f .low cost. [0009] Conventional molds mostly use stainless steel or a heat-resistant alloy as a mold material, and such a mold is prone to oxidation at a temperature, and under the action of repeated thermal shock, grain growth occurs, and the surface of the mold becomes rough, and the glass is bonded. [0010] In order to solve the above problems, non-metal and super-hard alloys are used for the mold. It has been reported that tantalum carbide (Sic), tantalum nitride (Si3N4), titanium carbide (Tic), tungsten carbide (WC) and carbonized town-drilled alloys have been used to make molds. However, the above various carbide ceramics have a very high hardness and are difficult to process into a desired shape, in particular, a high-precision aspherical shape. In addition to being difficult to process, superhard alloys may undergo high temperature oxidation after a period of use. [0011] Therefore, a carbide or superhard alloy is used as a mold base, and a glass forming mold having other material plating or coating on its surface has become a new development direction. A typical glass forming mold such as U.S. Patent No. 4, 685, 948 No. 4, 882, 827, and 5, 203, 156. [0012] US Patent No. 4, 685, 948 discloses a glass forming mold for direct compression molding of optical glass products. It uses high-strength super-hard alloy, carbide ceramic or cermet (Cermet) as the mold base, and forms an iridium (Ir) film layer on the mold surface of the mold, or Ir and platinum (Pt). , (Re) '锇 (〇s), rhodium (Rh) or needle (Ru) alloy film layer, or Ru film layer, or Ru and Pt,

Alloy film layer of Ke, 〇s, Rh. The film layer can be effectively prevented by the film layer. Form No. A〇i01 Page 4 of 16 0993206183-0 June 11, 099 Yongzheng The high temperature oxidation of the mold base occurs. [00131 « ^ pp. 4, 882, 827 discloses a glass forming apparatus which forms a hard carbon film on a mold base by sputtering to solve the problem of high temperature oxidation, which is made of microcrystals. It consists of amorphous and amorphous graphite and graphite-like particles. The hard membrane does not contain argon atoms, and the homogeneity is high, but there is a tendency that the smoother the surface, the greater the stress. As a result, the hard carbon film is peeled off in a minute region such as a polishing crack of the mold base or a residual polishing agent or a grain boundary as the stress is released during the molding. (10) 14] A method of preparing a glass forming mold for an optical glass product is disclosed in U.S. Patent No. 5,202,156. It uses a high-strength super-hard alloy, carbide ceramic or cermet as the mold base, and forms a diamond-like film (DLC, Diamond Like Carbon) on the mold surface of the mold. Wei Zhongshan and Zuo Dun are stable in Aviation Precision Manufacturing Technology V〇i. 4〇

No. 1, 20-23 (Feb. 2004), "Preparation and Application of Diamond-Like Membrane"'s article describes the preparation method and application of diamond-like carbon film. [〇〇15] The above glass forming mold is formed on the mold substrate. After the film is used for a long period of time, it may be worn away or cracked (Crack), peeled, and microcrack, which may affect the release properties, resulting in the appearance of glass product sticking during demolding. The phenomenon cannot be smoothly taken out by the robot. [0016] In view of the above, it is necessary to provide a glass forming mold which is easy to demould. [Explanation] [0017] Hereinafter, an easy release mold product will be described by several embodiments. Easy to take 094106552 Form No. A0101 Page 5 / Total 16 Pages 0993206183-0 1329620 Modified glass sheeting die on June 11, 2009. [0018] To achieve the above, a glass forming mold is provided, which includes: 0019] an upper mold; [0020] a mold core; [0021] a positioning ring between the upper mold and the lower mold; and [0022] one for mounting the upper mold, the lower mold And positioning The outer die casing;

[0023] wherein the side wall of the positioning ring is provided with a plurality of through holes that are electrically connected to the inner wall of the positioning ring, and the side wall of the outer mold sleeve is provided with at least one through hole communicating with a plurality of through holes of the side wall of the positioning ring. The positioning ring includes a first portion having a plurality of through holes on a side wall and a second portion disposed in cooperation with the lower mold core, and the two radial cross sections of the first portion of the inverted frustum shape are respectively provided with the Multiple through holes. [0024] Preferably, the through holes of the sidewalls of the first portion are axially disposed in a horizontal direction.

[0025] Preferably, the first portion is located above a horizontal position at which the molding surface of the lower mold core is located. Preferably, the outer wall of the positioning ring is provided with an annular groove communicating with a plurality of through holes of the first partial sidewall. [0027] Preferably, a plurality of through holes of the sidewall of the first portion are symmetrically distributed on the two radial cross sections, respectively. [0028] Preferably, among the symmetrically distributed through holes, a through hole having a radial cross section close to the lower mold core has a larger aperture. [0029] Preferably, the molding surface of the upper mold core and the lower mold core is aspherical. 094106552 Form No. A0101 Page 6 / Total 16 Pages 0993206183-0 1329620 ________l099^06^ni~gi^r| [0030] Compared with the prior art, the glass forming mold of the present technical solution is provided with gas in the positioning ring and the outer mold sleeve. The utility model has the advantages of simple structure, low cost and convenient use, and can effectively solve the problem of the sticking of the glass product which occurs when the mold is opened. The technical solution can further adjust the position of the molded glass product in the mold through different through holes, and solve the problem that the glass product cannot be taken out. [Embodiment] [0031] The technical solution will be further described in detail below with reference to the accompanying drawings. [0032] Please refer to the first to fourth figures together, the technical solution provides a molding die 100 for molding an optical glass product, which comprises: [〇〇33]-upper mold 1〇; [0034] Lower mold core 30; [0036] [0036]

[0038] a locating ring 20 between the upper mold core and the lower mold core 30; and ~ for mounting the outer mold core 1 , the positioning ring 20 and the outer portion of the lower mold core 30 The mold sleeve 50; wherein the side wall of the positioning ring 20 is provided with a plurality of through holes 211, 212 and the inner wall 213 of the positioning ring are electrically connected, and the side wall of the outer mold sleeve 50 is provided with a plurality of through holes 51 and the through holes 211, 212 are connected. In the present embodiment, there are four through holes 51, 211 and 212. The positioning ring 20 includes a first portion 210 having a plurality of through holes 211, 212 on a side wall and a second portion 220 positioned in cooperation with the lower mold core 30. The inner wall 21 of the first portion 21 in the present embodiment 3 is an inverted truncated cone shape; the second portion 220 is a cylindrical shape that cooperates with the lower mold core 30. 094106552 Form Mirror A0101 苐7 Page/Total 16 Pages 0993206183-0 1329620 Correction Replacement Page, June 11, 2008 [0039] Preferably, the axial direction of the through holes 211, 212 of the side wall of the first portion 210 is disposed in the horizontal direction. [0040] Preferably, the first portion 210 is located above the horizontal position of the molding surface 301 of the lower mold core 30.

[0041] The inner wall 213 communicates with the through hole 51 of the sidewall of the outer die sleeve 50 through the through holes 211 and 212. In this embodiment, the outer wall of the positioning ring 20 is provided with a ring-shaped recess 215, and the through holes 211, 21 2 communicate with the through hole 51 of the sidewall of the outer die sleeve 50 through the annular groove 2 15 . In other embodiments, the through holes 211, 212 and the through holes 51 may also be directly connected or communicated by other means. [0042] Preferably, the through holes 211, 212 are symmetrically distributed on the first part 210, respectively. The radial cross-section and the aperture 212 located near the lower mold core 30 have a larger aperture than the aperture 211. [0043] Please refer to the fifth and sixth figures together. Since the glass forming mold is used for a long time, the glass product may adhere to the mold when the mold is opened, so that the robot cannot take out the glass product. In the mold opening process of the glass φ glass forming mold 100 provided by the technical solution, if the glass product 60 adheres to the molding surface 101, the air can be blown through the through hole 51 of the outer mold sleeve 50, and the air flow passes through the annular groove 215 in the direction of the arrow, and The through holes 211, 212 are blown toward the glass product 60 to be dropped. Since the inner wall 213 of the first portion 210 is in the shape of an inverted truncated cone, if the glass product 60 is not in the ideal position when it is blown off, it can be adjusted by blowing through the through holes 211 and 21 2 of different apertures, so that the glass product 60 reaches the central position, which is convenient. The robot (not shown) is taken out. [0044] In order to meet the needs of various shapes of glass lenses, the technical solution can also enter a page 8 / a total of 16 pages 0993206183-0 094106552 Form No. A0101 1329620 099 〇 June step in the upper mold 10 and the lower mold 30 The molding surface ιοί, 301 is engraved into a pre-designed optical lens surface shape by micro-machining technology, such as aspherical surface [0045] Of course, the technical solution can be used not only for molds for molding optical glass products, but also for other shapes and uses. The mold of the molded product. [0046] The glass forming mold provided by the technical solution is provided with a gas flow through hole in the positioning ring and the outer mold sleeve, which can effectively solve the problem of the glass product adhesive mold which occurs when the mold is opened; the technical solution can be further adjusted through different through holes. The position of the molded glass product in the mold solves the problem that the glass product cannot be taken out, thereby effectively improving the release property. In summary, the glass forming mold of the technical solution has the advantages of simple structure, low cost, easy demoulding, and convenient use. [0047]

[0049] The invention described above on τ has indeed met the requirements of the invention patent, and the above is only a preferred embodiment of the invention. The above is only a limitation of the present invention. Please patent scope. Equivalent modifications or variations made in accordance with the spirit of the present invention should be covered by the following claims. [Simple description of the drawing] - The drawing is an explosion diagram of the glass forming mold of the technical solution. . & amp 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 094 。 。 。 。 Table Level Compilation 0101, Fig. 9/Total 16 Pages 0993206183-0 1329620 Correction Replacement Page, June 11, 2009 [0052] The fifth and sixth figures are schematic diagrams showing the state of use of the glass forming mold of the present technical solution. [Main component symbol description]

[0053] Mold 100 Upper Mold 10 [0054] Molding Surface 101, 301 Locating Ring [0055] First Part 210 Through Hole 211, 212, [0056] Inner Wall 213 Annular Groove 215 [0057] Second Part 220 Lower Mold 30 [ 0058] External mold sleeve 50 glass product 60 20 51 094106552 Form number A0101 Page 10 / Total 16 page 0993206183-0

Claims (1)

Correction replacement page on June 11, 099 1329620 VII. Shen 4 treatment 1. A glass molding mold, which includes: an upper mold core; a positioning ring between the upper mold core and the lower mold core; and an outer mold sleeve for mounting the upper mold core, the lower mold core and the positioning ring; the improvement is that the side wall of the positioning ring is provided with plural The through hole is electrically connected to the inner wall of the positioning ring, and the outer side wall of the outer mold sleeve is provided with at least one through hole communicating with a plurality of through holes of the side wall of the positioning ring, the positioning ring includes a first portion of an inverted truncated cone shape and a The second portion of the first mold portion of the inverted frustum shape is respectively provided with the plurality of through holes. The glass forming mold according to the first aspect of the invention, wherein the through hole of the first side wall is axially disposed in a horizontal direction. 3. The glass forming mold of claim 2, wherein the first portion is located above a horizontal position at which the molding surface of the lower mold core is located. 4. The glass forming mold according to claim 3, wherein the outer wall of the positioning ring is provided with an annular groove communicating with a plurality of through holes of the side wall of the first portion. 5. The glass forming mold of claim 1, wherein the plurality of through holes of the first portion of the side walls are symmetrically distributed on the two radial transverse surfaces. 6. The glass forming mold according to claim 5, wherein, among the symmetrically distributed through holes, a through hole having a radial cross section close to the lower mold core has a larger aperture. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The molded surface of the lower mold is aspherical. 094106552 Form No. A0101 Page 12 of 16 0993206183-0