TWI786070B - Mold for fabricating glass molding lens and fabrication method of glass molding lens - Google Patents

Abstract

A mold for fabricating a glass molding lens includes a first core, a second core, a first sleeve disposed outside the first core, and a second sleeve disposed outside the second core. The first sleeve has a first plane facing the second sleeve and a first positioning part disposed on the first plane. The second sleeve has a second plane facing the first sleeve and a second positioning part disposed on the second plane. The first positioning part and the second positioning part are in convex-concave shape correspondence and may engage with each other.

Description

Mold for manufacturing glass molded lens and method for manufacturing glass molded lens

The present invention relates to a method for manufacturing a lens and a mold for manufacturing the lens, and in particular to a method for manufacturing a glass molded lens and a mold for manufacturing a glass molded lens.

General optical products have precise optical lens elements, and optical lenses can be roughly divided into spherical lenses and aspheric lenses. At present, spherical lenses are mostly manufactured by grinding, while aspheric lenses are mostly manufactured by molding or injection molding technology.

Conventional optical lens molding devices usually use a cylindrical sleeve to cooperate with a pair of upper mold core and lower mold core to form a mold cavity, and the mold cavity can be filled with glass nitrate, and the glass nitrate is softened in a high temperature environment. Molded into the desired shape and cooled to obtain the desired optical lens. However, there is a gap formed by the assembly tolerance between the mold core and the cylindrical sleeve, and this gap is likely to cause the upper mold core to be tilted to varying degrees during assembly, making the upper mold core and the lower mold core appear uneven Morphology, which in turn leads to the phenomenon of decentering of the optical lens after molding.

The "Prior Art" section is only used to help understand the content of the present invention, so the content disclosed in the "Prior Art" section may include some prior art that does not constitute the prior art that is known by those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not represent that the The content or the problem to be solved by one or more embodiments of the present invention have been known or recognized by persons with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides a mold for manufacturing glass molded lenses and a method for manufacturing glass molded lenses.

According to an aspect of the present invention, a mold for manufacturing glass molded lenses includes a first mold core, a second mold core, a first inner sleeve, and a second inner sleeve. The first inner sleeve is arranged outside the first mold core, and the second inner sleeve is arranged outside the second mold core. The first inner sleeve is provided with a first plane facing the second inner sleeve, and a first positioning portion located on the first plane, the second inner sleeve is provided with a second plane facing the first inner sleeve, and The second positioning part is arranged on the second plane. The first positioning part and the second positioning part are set in corresponding convex and concave shapes, and can be fitted with each other.

According to another aspect of the present invention, a method for manufacturing a glass molded lens is provided. First, put the first mold core and the second mold core into the first inner sleeve and the second inner sleeve respectively. The first inner sleeve may be provided with a first plane facing the second inner sleeve, and a first protrusion and a second protrusion protruding from the first plane. The second inner sleeve may be provided with a second plane facing the first inner sleeve, and a first recess and a second recess recessed in the second plane. Next, place the glass nitrate material on the second mold core and heat the glass nitrate material, and then shorten the distance between the first mold core and the second mold core. The distance between the first mold core and the second mold core can be shortened by contacting the first protrusion and the second protrusion with the inclined surfaces of the first cavity and the second cavity respectively, so that the distance between the first mold core and the second mold core is reduced. The glass material between the mold cores is molded to form a glass molded lens.

With the design of the above embodiment, the positioning part formed and fitted between the two inner sleeves can improve the positioning accuracy of the first mold core relative to the second mold core, and can reduce as much as possible without affecting the movement of the mold core. The gap between the mold core and the sleeve is small to reduce the axial displacement, so the axial deviation of the forming lens can be effectively improved without affecting the mass production of the process. Furthermore, because the first mold core is designed to be interlocking with the first inner sleeve, the first mold core and the first inner sleeve can be taken together from the mold or put into the mold, avoiding the need to pick and place the second mold core in the mold. Problems such as mold jamming and collision caused by a mold core, and when different positioning parts are fitted, there can still be a gap between the first inner sleeve and the second inner sleeve, so that inert gas can enter the sleeve, glass , Air replacement between mold cores to reduce the probability of oxidation of mold, glass and oxygen reaction. In addition, by using the steering of the inner sleeve to change the matching objects of the protrusion and the cavity, an axis deviation correction mechanism can be provided to obtain the minimum misalignment.

In order to make the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

10, 30: Mold

12: The first mold kernel

14: Second mold core

15: The third model kernel

16: The first inner sleeve

18: Second inner sleeve

19: The third inner sleeve

161, 181, 182, 191: plane

20: Lens

21: Mold cavity

22: outer sleeve

24, 24': the first positioning part

26, 26': the second positioning part

27: The third positioning department

29: The fourth positioning department

32: Positioning structure

34: Gap

36: Block

O: axis

P: Bump

Q: pit

PS, QS: contact surface

FIG. 1 is an exploded view of a mold for manufacturing a glass molded lens according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the mold in FIG. 1 .

FIG. 3 is an enlarged schematic diagram of the alignment relationship of the positioning part according to an embodiment of the present invention.

FIG. 4 is a schematic top view of the mold in FIG. 1 .

FIG. 5 is a schematic cross-sectional view of a mold according to another embodiment of the present invention.

Figure 6A is a mold for manufacturing glass molded lenses according to another embodiment of the present invention 6B is a schematic top view of the mold in FIG. 6A.

FIG. 7 is an enlarged schematic diagram of the alignment relationship of the positioning part according to another embodiment of the present invention.

FIG. 8 is a schematic top view of a mold according to another embodiment of the present invention.

The foregoing and other technical contents, features and functions of the present invention will be clearly presented in the following detailed descriptions of multiple embodiments with reference to the drawings. In addition, the terms "first" and "second" used in the following embodiments are used to identify the same or similar elements, and the directional terms such as "front" and "rear" are only for referring to the attached drawings The direction is not intended to limit the described elements.

FIG. 1 is an exploded schematic diagram of components of a mold for manufacturing glass molded lenses according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the mold in FIG. 1 . Please first refer to Fig. 1 and Fig. 2 simultaneously, the mold 10 that is used to manufacture glass molded lens of present embodiment comprises a first mold core 12, a second mold core 14, a first inner sleeve 16, and a second Inner sleeve 18. The first inner sleeve 16 is disposed outside the first mold core 12 , and the second inner sleeve 18 is disposed outside the second mold core 14 . The second inner sleeve 18 can butt against the first inner sleeve 16 to define at least one mold cavity 21 , and the first mold core 12 or the second mold core 14 can move in the mold cavity 21 . In addition, the mold 10 of this embodiment can further include an outer sleeve 22, and the first mold core 12, the second mold core 14, the first inner sleeve 16 and the second inner sleeve 18 can be located in the outer sleeve 22 . The first mold core 12 can move close to the second mold core 14 to form the glass molded lens 20 by molding the glass material between the first mold core 12 and the second mold core 14 . The first inner sleeve 16 is provided with a plane 161 facing the second inner sleeve, and is located on the plane 161 The second inner sleeve 18 is provided with a plane 181 facing the first inner sleeve 16 , and at least one second positioning portion 26 is disposed on the plane 181 . The first positioning portion 24 and the second positioning portion 26 can be set in corresponding convex and concave shapes, and can be fitted with each other. FIG. 3 is an enlarged schematic diagram of the alignment relationship of the positioning part according to an embodiment of the present invention. In this embodiment, the first positioning portion 24 can be, for example, a protrusion P and the second positioning portion 26 can be, for example, a concave hole Q. The first inner sleeve 16 is provided with a protrusion P protruding from the plane 161 , a contact surface PS of the bump P and the plane 161 of the first inner sleeve 16 is an inclined surface, and the second inner sleeve 18 is provided with a recess Q recessed in the plane 181, and the recess Q is in contact with the plane 181 Surface QS is an inclined surface. When the first mold core 12 and the second mold core 14 are close to each other, the distance between the first mold core 12 and the second mold core 14 can be shortened by contacting the bump P with the inclined contact surface QS of the cavity Q, and by The fitting action of the bump P and the concave hole Q can improve the positioning accuracy of the first mold core 12 relative to the second mold core 14 and can reduce the gap between the mold core and the sleeve, so the axis of the forming lens can be effectively improved. Partial (decenter) problem. Furthermore, in this embodiment, it can be designed that when the protrusion P is fitted into the concave hole Q, there is still a gap 34 between the first inner sleeve 16 and the second inner sleeve 18, so that the inert gas can enter the sleeve. Air replacement is carried out between the cylinder and the mold core to reduce the probability of oxidation caused by the reaction of the mold and glass with oxygen.

In addition, the paired first positioning portion 24 (protrusion P) and second positioning portion 26 (cavity Q) can form a positioning structure 32, and in this embodiment, the first inner sleeve 16 and the second A plurality of positioning structures 32 may be provided between the inner sleeves 18 . As shown in FIG. 2, the three positioning structures 32 may not be connected to each other (that is, there is a distance between two adjacent protrusions P or two adjacent recesses Q), and may form a co-circular configuration relationship to ensure that the first benevolent 12 and the second mold core 14 can further reduce the misalignment of the vertices of the upper and lower mirror surfaces of the lens 20 . Moreover, as shown in Figure 2, a stopper 36 can be arranged between the first mold core 12 and the first inner sleeve 16, so that the first mold core 12 and the first inner sleeve 16 can move together, and the stopper 36 can stop the rotation of the first mold core 12 to provide the effect of fixing the placement of the first mold core 12 to the position. Because the first mold core 12 and the first inner sleeve 16 can move together, the first mold core 12 and the first inner sleeve 16 can be taken from the mold 10 or put into the mold 10 to avoid taking them out of the mold 10. Problems such as mold jamming and collision caused by placing the first mold core 12. Moreover, in one embodiment, as shown in FIG. 4 , the first mold core 12 and the first inner sleeve 16 can be rotated to different positions, so that the same positioning part 24 (protrusion P) can be selectively inserted into the second mold. One of the three concave holes Q in the core 14, and then adopt the collocation that will produce the smallest axial deviation among the three, so by the first positioning part 24 (protrusion P) and the second positioning part 26 (cavity Q ) can provide a one-axis deflection correction mechanism. For example, if the lens 20 is formed for the first time and it is found that the misalignment is not well controlled, the first mold core 12 and the first inner sleeve 16 can be rotated to different positions to change the matching objects of the bump P and the concave hole Q to obtain the minimum amount of misalignment. In addition, the collocation of the first positioning part 24 and the second positioning part 26 in the embodiment of the present invention is also applicable to more than two mold cores and inner sleeves. In one embodiment, as shown in Figure 5, the second mold core 14/second inner sleeve 18 can be placed in the first mold core 12/first inner sleeve 16 and the third mold core 15/third inner sleeve Between barrels 19. The second inner sleeve 18 can be provided with a plane 182 facing the third inner sleeve 19, and a third positioning portion 27 located on the plane 182. The third inner sleeve 19 is provided with a plane 182 facing the second inner sleeve 18. A plane 191, and a fourth positioning portion 29 disposed on the plane 191, the third positioning portion 27 and the fourth positioning portion 29 are set in a corresponding convex-concave shape, and can be fitted with each other, by The mutual fitting of a plurality of positioning parts 24, 26, 27, 29 can also obtain the aforementioned effects. The manner and structure of each positioning portion correspondingly distributed on different planes of different inner sleeves are not limited at all. In this embodiment, the two opposite planes can respectively form corresponding plurality of bumps and plurality of cavities, and the plurality of bumps and the plurality of cavities can be embedded with each other. In another embodiment, one of the first inner sleeve or the second inner sleeve may include two components, but only corresponds to one mold core, as shown in Figure 5, the second inner sleeve may include two components 18, 19, But it only corresponds to one mold core 15, and the length of the mold core 15 can extend from the component 19 to the component 18. At this time, the mold core 14 can not be used to reduce the complexity of the mold.

FIG. 6A is a schematic cross-sectional view of a mold for manufacturing glass molded lenses according to another embodiment of the present invention, and FIG. 6B is a schematic top view of the mold in FIG. 6A . Please refer to FIG. 6A and FIG. 6B at the same time. The mold 30 of this embodiment is similar to the mold 10 of FIG. 2, but the main difference between the two is that this embodiment has four first positioning parts 24' and four second positioning parts 26 ′, and the positioning portions 24 and 24 ′ are located on two rectangular coordinate axes substantially taking the axis O of the mold 30 as the origin. In this embodiment, the first positioning part 24' and the second positioning part 26' are distributed along the rectangular coordinate axis, and it is easy to control the positions of the first mold core 12 and the second mold core 14 along the X and Y axis directions to improve positioning. precision. In addition, the four alignment structures (four pairs of first positioning parts 24' and second positioning parts 26') distributed along the X and Y axes can provide four-position matching, and the first mold core 12 together with the second An inner sleeve 16 is rotated to different positions to change the matching objects of the protrusion P and the cavity Q to obtain the minimum misalignment. Furthermore, in different embodiments of the present invention, the structural shape of each positioning portion is not limited at all, and can be changed according to its distribution. For example, the first positioning portion 24' and the second positioning portion 26' may have a pyramid shape as shown in FIG. The distribution mode, and the inclined plane processing of the pyramid is relatively simple. Alternatively, the first positioning portion 24 and the second positioning portion 26 may have a conical shape as shown in FIG. 3 , so as to match a concentric distribution manner. In another embodiment, as shown in FIG. 8, the two first positioning parts 24' and the two second positioning parts 26' can be distributed only on one side of the X-axis and the Y-axis, and the X-axis and the Y-axis can also be obtained. Positioning control effect in axis direction.

With the design of each of the above-mentioned embodiments, the positioning structure provided and fitted between the two inner sleeves can improve the positioning accuracy of the first mold core relative to the second mold core, and can move as much as possible without affecting the movement of the mold core. Reduce the gap between the mold core and the sleeve to reduce the amount of axial deviation, so the axial deviation of the forming lens can be effectively improved without affecting the mass production of the process. Furthermore, because the first mold core is designed to be interlocking with the first inner sleeve, the first mold core and the first inner sleeve can be taken together from the mold or put into the mold, avoiding the need to pick and place the second mold core in the mold. Problems such as mold jamming and collision caused by a mold core, and when different positioning parts are fitted, there can still be a gap between the first inner sleeve and the second inner sleeve, so that inert gas can enter the sleeve, glass , Air replacement between mold cores to reduce the probability of oxidation of mold, glass and oxygen reaction. In addition, by using the steering of the inner sleeve to change the matching objects of the protrusion and the cavity, an axis deviation correction mechanism can be provided to obtain the minimum misalignment.

It should be noted that the positioning part only needs to provide the effect of fitting, snapping or locking, and its structure, quantity and size are not limited at all, such as positioning beads, positioning holes, positioning grooves, positioning protrusions, positioning Pins, etc., and the shapes of the two corresponding positioning parts that are fitted with each other can be the same or different, for example, a cone or a ball can be matched with an inclined plane. Furthermore, the mold used to manufacture glass molded lenses may be a one-cavity Or the structure of one mold and multiple cavities can be used without limitation.

Another embodiment of the present invention may provide a method of manufacturing a glass molded lens. First, put the first mold core and the second mold core into the first inner sleeve and the second inner sleeve respectively. The first inner sleeve may be provided with a first plane facing the second inner sleeve, and at least one first protrusion and a second protrusion protruding from the first plane. The second inner sleeve can be provided with a second plane facing the first inner sleeve, and at least a first recess and a second recess recessed in the second plane. Next, a glass material is placed on the second mold core and the glass material is heated. In one embodiment, the time for heating the glass nitrate can be between 180 seconds and 600 seconds, the temperature for heating the glass nitrate can be between 300°C and 700°C, and the pressure for heating the glass medium can be between 10000 Pa and 90000 Pa. Furthermore, to shorten the distance between the first mold core and the second mold core, the first mold core can be shortened and shortened by contacting the first protrusion and the second protrusion with the inclined surfaces of the first cavity and the second cavity respectively. The distance between the second mold cores is such that the glass material located between the first mold cores and the second mold cores is molded to form glass molded lenses.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

10‧‧‧Mold

12‧‧‧The first mold

14‧‧‧The second model kernel

16‧‧‧The first inner sleeve

18‧‧‧Second inner sleeve

161, 181‧‧‧plane

20‧‧‧Lens

22‧‧‧Outer sleeve

24‧‧‧The first positioning department

26‧‧‧The second positioning department

36‧‧‧block

Claims (8)

A mold for manufacturing glass molded lenses, comprising: a first mold core and a second mold core; a first inner sleeve disposed on the outside of the first mold core; and a second inner sleeve disposed on the The outer side of the second mold core, wherein the first inner sleeve is arranged on a first plane facing the second inner sleeve, and a first protrusion and a second protrusion protruding from the first plane, A contact surface between the first protrusion and a second protrusion and the first plane is an inclined surface, and the second inner sleeve is provided with a second plane facing the first inner sleeve and recessed in the first inner sleeve. A first concave hole and a second concave hole in two planes, a contact surface between the first concave hole and the second concave hole and the second plane is an inclined surface, and the first protrusion fits into the first concave hole When the hole is opened, there is a gap between the first inner sleeve and the second inner sleeve. The mold as claimed in item 1, wherein the mold satisfies at least one of the following conditions: (1) the position of the first bump and the second bump are set to be concentric, (2) the position of the first bump and the The position of the second bump is set on two rectangular coordinate axes that take the axis of the mold as the origin. The mold as claimed in claim 1, wherein the first bump is configured as a cone. The mold as claimed in claim 1, wherein the first bump is configured as a pyramid. The mold according to claim 1 further includes a stopper disposed between the first mold core and the first inner sleeve. The mold as claimed in claim 1, wherein the first bump and the second bump are not connected to each other, and the first cavity and the second cavity are not connected to each other. The mold as described in claim item 1 further includes: A third mold core, wherein the second mold core is located between the first mold core and the third mold core; and a third inner sleeve, arranged outside the third mold core, wherein the second plane faces the A third plane of the third inner sleeve, a third protrusion and a fourth protrusion are arranged on the third plane, and the third protrusion and the fourth protrusion correspond to the first recess and the second Concaves, and can fit each other. A method for manufacturing glass molded lenses, comprising: placing a first mold core and a second mold core into a first inner sleeve and a second inner sleeve respectively, wherein the first inner sleeve is provided with a facing A first plane of the second inner sleeve, and a first protrusion and a second protrusion protruding from the first plane, the second inner sleeve is provided with a face facing the first inner sleeve the second plane, and a first cavity and a second cavity depressed on the second plane; placing a glass material on the second mold core; heating the glass material; and shortening the first mold core and The distance between the second mold core and the first mold core can be shortened by the contact of the first protrusion and the second protrusion with an inclined surface of the first cavity and the second cavity, respectively. The distance between the second mold core, and when the first protrusion fits into the first cavity and the second protrusion fits into the second cavity, the distance between the first inner sleeve and the second inner sleeve There is a gap.

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