CN108726851B

CN108726851B - Manufacturing method of glass molded lens and sleeve for manufacturing glass molded lens

Info

Publication number: CN108726851B
Application number: CN201710240203.1A
Authority: CN
Inventors: 刘永光; 李建宏
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2017-04-13
Filing date: 2017-04-13
Publication date: 2021-12-14
Anticipated expiration: 2037-04-13
Also published as: CN108726851A

Abstract

The present invention provides a method for manufacturing a glass molded lens and a sleeve for manufacturing the glass molded lens. A method of manufacturing a glass molded lens includes the following steps. Put the glass glazing material on the first mold core. Heating glass glazing. The distance between the second die core and the first die core is shortened, wherein the first die core or the second die core shortens the distance between the second die core and the first die core by rolling contact with the at least one rolling element.

Description

Method for producing glass molded lens and sleeve for producing glass molded lens

Technical Field

The present invention relates to a method for manufacturing a lens and a sleeve for manufacturing a lens, and more particularly, to a method for manufacturing a glass molded lens and a sleeve for manufacturing a glass molded lens.

Background

In general, optical products have precise optical lens elements, wherein the optical lens elements can be roughly divided into spherical lenses and aspherical lenses. Currently, spherical lenses are usually manufactured by grinding, and aspherical lenses are usually manufactured by molding or injection molding.

The existing optical lens molding device usually utilizes 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 material, and the glass material is softened under the environment of high temperature to mold into the required shape, and the required optical lens is obtained after cooling. However, a gap formed by assembly tolerance exists between the mold core and the cylindrical sleeve, and the gap is likely to cause the upper mold core to incline to different degrees when the upper mold core is assembled, so that the upper mold core and the lower mold core are in an uneven shape, and further, the molded optical lens has a lens axis deviation (center).

Disclosure of Invention

The embodiment of the invention provides a manufacturing method of a glass molded lens, which can solve the problem of axial deviation of the existing lens.

The embodiment of the invention also provides a sleeve for manufacturing the glass molded lens, which can solve the problem of lens axial deviation.

The method for manufacturing a glass molded lens according to an embodiment of the present invention includes the following steps. Placing glass material on the first mold core. Heating the glass material. And the distance between the second die core and the first die core is shortened, wherein the first die core or the second die core is in rolling contact with at least one rolling piece so as to shorten the distance between the second die core and the first die core.

An embodiment of the present invention provides a sleeve for manufacturing a glass molded lens, which comprises at least one mold cavity and at least three grooves. The mold cavity can be used for the first mold core or the second mold core to move in the mold cavity. The grooves are not connected with each other, and the inner wall of any one of the at least three grooves is communicated with the mold cavity.

An embodiment of the present invention provides a sleeve for manufacturing a glass molded lens, which includes two mold cavities and a plurality of grooves. The mold cavities are separated from each other. The grooves are not connected with each other, the inner wall of any one of at least three of the grooves is communicated with one of the die cavities, and the inner wall of any one of at least three of the grooves is communicated with the other die cavity.

In view of the above, in the method for manufacturing a glass molded lens according to the embodiment of the invention, the mold core is relatively close to the other mold core by rolling contact with the rolling member, so that the glass material is molded to form the glass molded lens. Compared with the gap formed by the assembly tolerance between the conventional mold core and the cylindrical sleeve, the embodiment of the invention achieves the purpose of forming the zero gap between the mold core and the sleeve by the rolling contact between the rolling pieces and the mold core. Therefore, the problem that the axial deviation precision of the lens is influenced by the gap in the prior art is solved. In other words, the manufacturing method of the glass molded lens of the embodiment of the invention can solve the problem of the existing lens axis deviation.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a mold for making a glass molded lens according to one embodiment of the invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3A is a top schematic view of the sleeve of FIG. 1;

FIG. 3B is a schematic side view of FIG. 3A;

FIG. 4 is a schematic cross-sectional view illustrating the second mold core of FIG. 1 moving closer to the first mold core;

FIG. 5 shows a schematic top view of a mold for making a glass molded lens according to another embodiment of the invention.

Description of reference numerals:

10: glass material;

20: glass molding the lens;

100. 100 a: a mold;

110. 110 a: a sleeve;

112. 112 a: a mold cavity;

114. 114 a: a groove;

120: a rolling member;

122: a first rolling member;

124: a second rolling member;

130: a first mold core;

140: a second mold core;

150: a stop block;

160: an outer sleeve;

d: diameter.

Detailed Description

FIG. 1 shows a schematic cross-sectional view of a mold for making a glass molded lens according to one embodiment of the present invention. Fig. 2 is shown as an exploded schematic view of fig. 1. Fig. 3A is a top view of the sleeve of fig. 1. Fig. 3B is a side view schematic of fig. 3A. Fig. 4 is a schematic cross-sectional view illustrating the second mold core of fig. 1 moving closer to the first mold core. Referring to fig. 1 and fig. 2, a mold 100 for manufacturing a glass molded lens according to the present embodiment includes a sleeve 110, a plurality of rolling elements 120, at least one first mold core 130 (only one is schematically shown in fig. 1), and at least one second mold core 140 (only one is schematically shown in fig. 1).

In detail, referring to fig. 1, fig. 3A, fig. 3B and fig. 4, the sleeve 110 of the present embodiment has at least one mold cavity 112 (only one is schematically shown in fig. 1) and at least three grooves (three columns of columnar voids or three columns of voids) 114 (only three are schematically shown in fig. 1). The rolling members 120 are disposed within the channel 114. The first mold core 130 is placed in the mold cavity 112. The second mold core 140 is placed in the mold cavity 112. When the second mold core 140 moves closer to the first mold core 130 by rolling contact with a portion of the rolling members 120, the glass material 10 between the first mold core 130 and the second mold core 140 is molded to form the glass molded lens 20.

Referring to fig. 3A again, the mold cavity 112 of the sleeve 110 of the present embodiment is connected to the grooves 114, and the grooves 114 are not connected to each other and extend along the extending direction of the sleeve 110. As shown in fig. 1, the rolling members 120 are, for example, a plurality of balls, which are inserted into the grooves 114 and form a point-contact rolling contact with the second mold core 140 inserted into the mold cavity 112. That is, in the mold 10 of the present embodiment, the rolling elements 120 in the form of balls and the second mold core 140 can be actuated in a point contact manner in an interference fit manner, so that a zero clearance is formed between the rolling elements 120 and the second mold core 140. In an embodiment, the rolling elements 120 and the second mold core 140 may also be actuated in a radial fit manner, which is not limited in the present invention. Here, the diameter D of the rolling member 120 of the present embodiment is preferably between 1 mm and 5 mm, wherein the number of rolling members 120 used may be inversely related to the diameter D thereof. Furthermore, the rolling member 120 is made of, for example, silicon carbide (SiC), tungsten carbide, tungsten steel, stainless steel, iron, ceramic, or other suitable high temperature-resistant metal composite material.

Furthermore, in other embodiments, not shown, the rolling elements can also be rollers, which are inserted into grooves or cylindrical recesses or recesses of the sleeve. When the first mold core and the second mold core are rectangular in plan view, the roller type rolling elements are placed in the grooves or the columnar gaps or the gaps of the sleeve, and can form line contact with the first mold core and the second mold core, which still belongs to the protection scope of the invention.

Furthermore, the mold 100 for manufacturing a glass molded lens of the present embodiment may further include a plurality of stoppers 150. Referring to fig. 1 and fig. 2 again, the rolling member 120 of the present embodiment may include a plurality of first rolling members 122 and a plurality of second rolling members 124. Each slot 114 is sequentially provided with at least two first rolling members 122, a stopper 150 and at least two second rolling members 124. That is, the stopper 150 is located between the first roller 122 and the second roller 124. Here, the first mold core 130 directly contacts the first rolling member 122 in a point contact or line contact manner, and the second mold core 140 moves closer to the first mold core 130 by rolling contact (i.e., point contact or line contact) with the second rolling member 124. In one embodiment, the stop 150 may not be disposed in the slot 114, and the invention is not limited thereto. In addition, the mold 100 for manufacturing a glass molded lens of the present embodiment further includes an outer sleeve 160, and the sleeve 110, the first mold core 130 and the second mold core 140 are located in the outer sleeve 160.

Referring to fig. 1, 2 and 4, in the method for manufacturing a glass molded lens, first, a sleeve 110 having at least one mold cavity 112 and at least three rows of grooves (three rows of cylindrical voids or three rows of voids) 114 (see fig. 3A) is provided, wherein the grooves 114 are not connected to each other and the inner wall of each groove 114 is connected to the mold cavity 112. Then, the first mold core 130 is placed in the mold cavity 112 of the sleeve 110. Then, at least two first rolling members 122 of the rolling members 120, a stopper 150 and at least two second rolling members 124 of the rolling members 120 are sequentially placed in each groove 114. Then, the glass material 10 is placed on the first mold core 130, the glass material 10 is heated, the second mold core 140 is placed in the mold cavity 112 of the sleeve 110, and the second mold core 140 is moved toward the first mold core 130 by rolling contact with the rolling member 120, so that the glass material 10 between the first mold core 130 and the second mold core 140 is molded to form the glass molded lens 20. Here, the glass molded lens 20 is an aspheric lens, and when the surface of the second mold core 140 is flush with the surface of the outer sleeve 160, the second mold core 140 stops moving, wherein the time for heating the glass material is 180 seconds to 600 seconds, the temperature for heating the glass material is 300 ℃ to 700 ℃, and the pressure for heating the glass material is 10000 pa to 90000 pa.

It should be noted that, in the above-mentioned mold 100 for manufacturing a glass molded lens, the sleeve 110 has only one mold cavity 112, and the number of the first mold core 130 and the second mold core 140 is also only one, wherein the first mold core 130, the second mold core 140 and the sleeve 110 may define one cavity, and the mold 100 for manufacturing a glass molded lens in this embodiment may be regarded as a mold structure with one cavity for one mold, but the invention is not limited thereto.

It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

FIG. 5 shows a schematic top view of a mold for making a glass molded lens according to another embodiment of the invention. Referring to fig. 1 and 5, a mold 100a for manufacturing a glass molded lens of the present embodiment is similar to the mold 100 for manufacturing a glass molded lens of fig. 1, but the two are mainly different in that: the sleeve 110a of the present embodiment includes a plurality of mold cavities 112a (only three are schematically shown in fig. 5), wherein the mold cavities 112a are separated from each other and each mold cavity 112a communicates with the inner walls of at least three slots (or cylindrical voids or voids) 114a that are not connected to each other. The number of the first mold core 130 and the second mold core 140 is three, and the first mold core 130 and the second mold core 140 are disposed in the mold cavity 112a of the sleeve 110a, and the first mold core 130 and the second mold core 140 are disposed correspondingly. Here, each of the first mold core 130, the second mold core 140 and the mold cavity 112a of the sleeve 110a may define a cavity, and the mold 100a for manufacturing a glass molded lens of the present embodiment may be regarded as a mold structure with one mold and three cavities.

In summary, in the mold for manufacturing a glass molded lens according to the embodiment of the invention, the rolling member is moved closer to the first mold core in a point contact or line contact manner by interference fit between the rolling member and the second mold core. Therefore, zero clearance can be formed between the second mold core and the rolling piece, and the problem of lens axial deviation can be effectively solved. On the other hand, the embodiment of the invention achieves the purpose of zero clearance in a mode of interference fit of the rolling piece and the second die core, so the embodiment of the invention does not need to consider the clearance fit between the second die core and the sleeve. In addition, according to the manufacturing method of the glass molded lens in the embodiment of the invention, the second mold core moves close to the first mold core through rolling contact with the rolling piece, so that the glass material is molded to form the glass molded lens. Compared with the gap formed by the assembly tolerance between the conventional mold core and the cylindrical sleeve, the embodiment of the invention achieves the purpose of forming the zero gap between the second mold core and the sleeve by the rolling contact between the rolling piece and the second mold core. Therefore, the embodiment of the invention does not have the problem that the axial deviation precision of the lens is influenced by the gap, and can effectively solve the problem of the axial deviation of the lens.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a glass molded lens, comprising:

Put the glass glass material on the first mold core;

heating the glass glazing material; and

shortening the distance between the second die core and the first die core, wherein the first die core or the second die core shortens the second die core and the first die core by rolling contact with a plurality of rolling elements The distance between the kernels, wherein at least two of the plurality of rolling elements are in direct contact.

2 . The method for manufacturing a glass molded lens according to claim 1 , wherein the plurality of rolling elements satisfy at least one of the following conditions: 3 .

(1) The plurality of rolling elements respectively include balls or rollers;

(2) The rolling contact of the plurality of rolling elements is point contact or line contact;

(3) the diameters of the plurality of rolling elements are respectively 1 mm to 5 mm; and

(4) The materials of the plurality of rolling elements respectively include tungsten carbide, tungsten steel, stainless steel, iron or ceramics.

3. The method for manufacturing a glass molded lens according to claim 1 or 2, wherein the plurality of rolling elements are placed in at least one gap of the sleeve, and the first mold core and the second mold core The mold core is placed in the sleeve, and the at least one void includes at least three rows of voids that are not connected to each other.

4. The method for manufacturing a glass molded lens according to claim 3, further comprising:

At least one stop is placed in the at least one gap, wherein the at least one stop is located between the plurality of rolling elements.

5. The method for manufacturing a molded glass lens according to claim 1 or 2, wherein heating the glass glazing material at least satisfies one of the following conditions:

(1) The time for heating the glass glazing material ranges from 180 seconds to 600 seconds;

(2) the temperature of heating the glass glazing material is between 300 degrees and 700 degrees; and

(3) The pressure of heating the glass glazing material ranges from 10,000 Pa to 90,000 Pa.

6. A sleeve for the manufacture of a glass molded lens, characterized in that it comprises:

at least one mold cavity for the first mold core or the second mold core to move in the mold cavity;

at least three grooves, which are not connected to each other and the inner walls of any one of the at least three grooves are connected to the mold cavity; and

A plurality of rolling elements are respectively placed in the at least three grooves, each of the at least three grooves is provided with the plurality of rolling elements, wherein at least two of the plurality of rolling elements are directly touch.

7. A sleeve for the manufacture of glass molded lenses, comprising:

Two mold cavities, separated from each other;

a plurality of grooves, which are not connected to each other and the inner walls of any one of at least three of the plurality of grooves communicate with one of the two mold cavities, and any one of at least three of the plurality of grooves The inner walls of the two mold cavities are connected to the other; And

A plurality of rolling elements are respectively placed in the plurality of grooves, each of the plurality of grooves is provided with the plurality of rolling elements, wherein at least two of the plurality of rolling elements are directly touch.

8. The sleeve for manufacturing a glass molded lens according to claim 6 or 7, wherein the plurality of rolling elements satisfy at least one of the following conditions:

(1) the plurality of rolling elements include a plurality of balls or a plurality of rollers;

(2) the plurality of rolling elements have a diameter of 1 mm to 5 mm; and

(3) The materials of the plurality of rolling elements include tungsten carbide, tungsten steel, stainless steel, iron or ceramics.

9. The sleeve for manufacturing a glass molded lens according to claim 6 or 7, further comprising:

A plurality of stoppers are respectively placed in the plurality of grooves and between the plurality of rolling elements.