KR100883801B1 - Glass Molding Press Molds for Manufacturing Multiple Coupling Lenses - Google Patents

Abstract

The present invention relates to a glass molding press mold for producing a plurality of coupling lenses. The present invention provides a glass molding press mold for manufacturing a coupling lens including a lens and a lens holder for accommodating and fixing the lens, the lower mold including a plurality of upper cores and a plurality of lower cores. It consists of a vertical drive unit for vertically driving the mold and the upper mold in the lower mold. In addition, an intermediate mold disposed between the upper mold and the lower mold is coupled to the upper mold and the lower mold, and the intermediate mold having a plurality of fixing holes for inserting and fixing the lens holder in a portion corresponding to the plurality of upper and lower cores. And an intermediate mold guide pin for connecting the intermediate mold with the lower mold. The glass molding press mold of the present invention having such a configuration has an advantage of manufacturing a plurality of coupling lenses in the molding press working operation. In addition, since the lower surface, which is a mounting reference surface of the lens holder inserted into the fixing hole of the intermediate mold, is in contact with the upper surface of the lower mold, even if a plurality of coupling lenses are manufactured, the distance between the lenses in each lens holder is the same. It is manufactured so as to reduce the defective rate of the coupling lens.

Description

GLASS MOLDING PRESS APPARATUS FOR MANUFACTURING MULTI COUPLING RING LENS

The present invention relates to a glass molding press die, and more particularly, a plurality of coupling lenses in a molding press machining operation, in which a fixing hole for inserting and fixing a plurality of lens holders is formed in an intermediate mold disposed between an upper mold and a lower mold. It relates to a glass molding press mold for producing a.

A mold is a general name of a mold or a mold made mainly of a metal material that is processed or molded using materials such as plasticity, malleability, and fluidity to produce an injection molded product. In order to classify the mold into applications, the mold is classified into various molds such as a press mold, a plastic mold, a die casting mold, a casting mold, a forging mold, a glass mold, and a powder metallurgy mold. The demand field of such a mold is widely used in home appliances, optical equipment, transportation equipment, industrial machinery, electrical equipment, glass containers, building materials, toys, miscellaneous goods. Among these, this invention relates to the glass molding press die which manufactures a coupling die used for a press die, especially an optical device.

First of all, the press mold is mainly a mold apparatus that produces various shapes by applying a compressive force to a metal material such as a steel sheet and plastically deforming it by bending, shearing, or cross-section shrinkage, without heating a metal material such as a steel plate. It can be processed and used widely. In particular, in the case of a glass molding press die, the glass is thermally deformed by applying a compressive force to the mold core having an optical glass material at a high temperature near the glass transition temperature and the glass yield point and having a shape and roughness of a sub-nanometer. An optical glass lens is manufactured by replicating cotton onto a material. The glass molding press molds are largely classified into a batch type in which a mold is fixed to a press and a progressive type through a pressing process while the mold is moved, and used to manufacture an aspherical glass lens.

1 illustrates a glass molding press mold for manufacturing a conventional coupling lens. As shown in the drawings, when the coupling lens is manufactured in the conventional glass molding press mold 2, one coupling lens is press-processed in most glass molding press mold 2. For example, in the conventional press mold 2, one upper core is formed in the upper mold, and one lower core is formed in the lower mold, so that only one coupling lens is manufactured during press working. In the manufacturing method, a lens holder having a predetermined dimensional shape is formed in the lower core in advance by cutting and the like, and a glass similar to a lens volume is inserted into the lens holder inner diameter. Thereafter, the upper core is dropped onto the lower core to press the glass. The pressurized glass material is molded into a lens while being integrated with the lens holder and manufactured as a coupling lens.

In summary, the conventional glass molding press mold (2) for manufacturing the above-mentioned coupling lens is significantly reduced work efficiency and efficiency compared to the working time because one coupling lens is manufactured through one molding press working operation Becomes In addition, the conventional glass molding press die has to be replaced or replaced at any time, if any one of the upper core and the lower core, which is the forming site is damaged or deformed, additional cost accordingly It affects not only occurrence but also cost increase of the coupling lens.

In addition, the upper core or the lower core portion is deformed through a long molding press operation or when the lens holder is installed in the glass molding press mold by manual or mechanical operation, the lens holder is not properly installed. The lower surface, which is a reference surface, is abnormally installed in the press die. When the press working operation in such a state does not form the same specifications, such as the position of the lens coupled to the inside of the lens holder, there is a problem that the specifications of the coupling lenses to be manufactured are all different. As a result, the failure rate of the coupling lenses manufactured eventually rises, and when the severeness of the coupling lenses is severely discarded, a problem of lowering the reliability of the coupling lenses occurs.

The present invention was devised to solve the conventional problems as described above, it is disposed between the upper mold and the lower mold, the fixing hole is formed in the portion corresponding to the upper core and the lower core lens during the molding press work It is a first object to provide a glass molding press apparatus comprising an intermediate mold for fixing a holder.

It is also a second object of the present invention to provide a glass molding press apparatus for manufacturing a plurality of coupling lenses by a plurality of upper and lower cores and a plurality of fixing holes formed in the intermediate mold.

Glass molding press mold for manufacturing a plurality of coupling lenses of the present invention for achieving the above object is a coupling lens comprising a lens for passing the light, and a lens holder which is a metal housing for receiving and fixing the lens. A glass molding press mold for manufacturing, comprising: an upper mold including an upper holder and a plurality of upper cores; A lower mold including a lower holder and a plurality of lower cores; Is disposed between the upper mold and the lower mold, a fixing hole is formed in each of the portions corresponding to the plurality of the upper core and the lower core, the intermediate for inserting and fixing the lens holder to each of the fixing hole during the molding press mold; An intermediate mold guide pin for coupling the intermediate mold to the upper mold and the lower mold; And an upper and lower driving part for driving the upper mold relatively up and down with respect to the lower mold.

In addition, according to an embodiment of the present invention, the intermediate mold may be characterized by using any one of a structure for resistance welding by a laser stem (stem) and a structure for laser welding to the optical transceiver housing. have.

In addition, according to an embodiment of the present invention, the upper holder portion or the lower holder portion is characterized in that the protrusion protection groove is formed in a predetermined portion in contact with the protrusion of the lens holder to protect the protrusion formed on the lower portion of the lens holder. Can be.

In addition, according to an embodiment of the present invention, the lower mold is installed on the lower mold when the glass molding press is moved by a plurality of processes, further comprising a moving plate for maintaining and protecting the dimensions of the mold can do.

In addition, according to another embodiment of the present invention, the lower surface of the lens holder inserted and fixed to the intermediate mold may be in contact with the upper surface of the lower mold.

Glass molding press mold for manufacturing a plurality of coupling lenses of the present invention is a molding press machining operation by inserting and fixing the lens holder in each of a plurality of fixing holes made of one or more in the middle mold disposed between the upper mold and the lower mold, There is an advantage in that a number of coupling lenses can be manufactured. Thus, the manufacturing time of the coupling lens can be shortened, and the manufacturing efficiency is also improved.

In addition, since the lower surface of the lens holder inserted into the intermediate mold fixing hole is in contact with the upper surface of the lower holder, even if a plurality of coupling lenses are manufactured, the distances between the lenses in the lens holder are all manufactured to the same standard. . This lowers the defective rate of the coupling lens and thus has the advantage of improving the reliability and quality of the coupling lens.

In addition, when the standard of the coupling lens is deformed during a long time of operation or when the coupling lens of another standard is produced, it is not necessary to install another glass molding press mold by replacing the intermediate mold. This has the advantage of reducing manufacturing costs and increasing space utilization at the factory site.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

 In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

Now, the glass mold press mold according to an embodiment of the present invention will be described in detail with reference to the drawings. The following terms are defined in consideration of functions in the present invention, and will vary depending on the intention or custom of the user or operator. Can be. Therefore, the definition should be made based on the contents throughout the present specification.

2 is a view showing an embodiment of a glass molding press mold for manufacturing a plurality of coupling lenses according to the present invention, Figure 3 is a glass molding press mold for manufacturing a plurality of coupling lenses according to the present invention. Figure of another embodiment for.

First, the coupling lens will be described briefly. The coupling lens is a type of optical element for transmitting and receiving light such as a laser light source and an optical fiber, an optical fiber and a laser light source, an optical connection between the optical fiber and the optical fiber, and light transmission. The lens is integrally formed in a cylindrical metal case having a cylindrical shape and a metal housing (hereinafter referred to as a lens holder).

In this case, the lens is a glass material in order to ensure the reliability of heat generated by the laser, it is preferable to apply an aspherical glass lens to minimize the spherical aberration by the aspherical equation to improve the resolution of the focus. In this case, the aspherical glass lens has an asaxis-symmetric or axisymmetric aspheric shape.

The glass molding press mold 1 of the present invention for manufacturing such a coupling lens has an upper mold 10, a lower mold 30, and an upper and lower driving unit for vertically driving the upper mold 10. In addition, there is an intermediate mold 20 disposed between the upper mold 10 and the lower mold 30, the intermediate mold guide pin 200 for connecting the intermediate mold 20 and the lower mold 30 ) Is included.

To explain the components of the present invention in more detail, the upper mold 10, the middle mold 20 and the lower mold 30 is a basic frame of the present invention glass molding press mold (1). The upper mold 10 is moved up and down on the basis of the lower mold 30 through the vertical drive. Here, the vertical drive unit is classified into a vacuum suction type, a hydraulic type, or a mechanical vertical drive unit according to a structure that generates a compressive force.

In addition, in the upper mold 10, the upper holder 100 and the upper core 110 are mounted, and the lower mold 30 is equipped with the lower holder 300 and the lower core 310 to perform molding press processing. do. In the present invention, the upper core 110 and the lower core 310 may be made of at least one or more, and thus a plurality of coupling lenses may be manufactured through one molding press working operation. At this time, the middle mold 20 is disposed between the upper mold 10 and the lower mold 30 to be coupled to the upper mold 10 and the lower mold 30. When the intermediate mold 20 is coupled to the lower side of the upper mold 10 and the upper side of the lower mold 20, the intermediate mold 20 is coupled and connected using the intermediate mold guide pin 320.

The intermediate mold 20 coupled to the upper mold 10 and the lower mold 30 corresponds to the upper core 110 of the upper mold 10 and the lower core 310 of the lower mold 30. The fixing hole 210 is formed in the site. The fixing hole 210 serves to fix the lens holder 4 by inserting the lens holder 4. By inserting a ball glass similar to the lens volume into the inner diameter of the lens holder 4 inserted into the fixing hole 210 of the intermediate mold 20 and then performing a molding press working operation, the ball glass is a lens 3 Is manufactured as the coupling lens coupled to the lens holder (4). The order in which the coupling lens is manufactured by the glass molding press mold according to the present invention will be described in more detail with reference to FIG. 6. In addition, the intermediate mold 20 is preferably a gas discharge minus groove 220 is configured. The gas discharge groove 220 maintains a nitrogen state or oxygen inside the glass molding press mold 1 in order to prevent the gas generated during the molding press machining operation from outside, and to prevent oxidation of the lens holder 4. It serves to reduce concentration.

On the other hand, the moving plate 40 is coupled to the lower mold 30, the lower mold 30 of the glass mold press die is to serve to maintain and protect the dimensions of the mold when moved by each process. .

In addition, Figure 4 is a view of an embodiment of the middle mold of the glass molding press mold for manufacturing a plurality of coupling lenses according to the present invention, the middle mold 20 of the glass molding press mold 1 of the present invention It can be used interchangeably according to the type of coupling lens to be molded. For example, the structure of the intermediate mold 20 also varies depending on the coupling lens that is molded and pressed as shown in FIGS. 4 (a) and 4 (b). 4 (a) is a structure of the intermediate mold 20 for resistance welding by a laser stem (stem), Figure 4 (b) is a structure of the intermediate mold 20 for laser welding the optical transmitting and receiving housing. . Since the intermediate mold 20 having such a different structure can be used in one press mold, there is an advantage of reducing costs and maximizing space utilization of a factory.

On the other hand, when the intermediate mold 20 is a structure for resistance welding by the laser stem (stem), as shown in Figure 4 (a), a protrusion is formed in the lower portion of the lens holder 4 for resistance welding . Since the protrusion must maintain a precise machining state, the protrusion protecting groove 320 is formed at a predetermined portion of the upper holder portion 100 or the lower holder portion 300 in contact with the lens holder protrusion to protect the protrusion. desirable.

5 is a view of another embodiment of a glass molding press mold for producing a plurality of coupling lenses in accordance with the present invention. The glass molding press mold 1 according to the present embodiment includes an upper mold 10 including a plurality of upper cores 110, a lower mold 30 including a plurality of lower cores 310, and the upper mold ( It may be configured to include an intermediate mold 20 disposed between the 10 and the lower mold (30). Since the above-listed components are similar to the description of the components of the injection mold described above with reference to FIGS. 2 to 4, detailed description thereof will be omitted. On the other hand, the upper core 110 and the lower core 310 is composed of a plurality as shown in Figure 5 (a) and 5 (b). As a result, a plurality of fixing holes 210 formed in the intermediate mold 20 are formed at portions corresponding to the upper core 110 and the lower core 310, respectively. Therefore, there is an advantage that a plurality of coupling lenses can be manufactured by one molding press working operation.
6 is also a diagram of another embodiment of a glass molding press mold for producing a plurality of coupling lenses in accordance with the present invention. As shown, in this embodiment, a press mold used when manufacturing general aspherical glass lenses such as a bare type aspheric coupling lens (hereinafter referred to as a “bare type lens”) and a camera lens without a lens holder. This is an embodiment showing (1). As described above, the intermediate mold 20 of the glass molding press mold 1 of the present invention is used by being replaced according to the type of the coupling lens to be pressed, so that the bare type without the lens holder as well as the coupling lens with the lens holder is used. Lenses also have the advantage of being able to manufacture many.

7 is a flowchart illustrating a manufacturing procedure of the glass molding press die according to the present invention. Referring to the manufacturing procedure according to the present invention as shown, first, the lower mold 300 is assembled by assembling the lower core 310 processed with the lower holder 300 and the aspherical shape. Thereafter, the lower mold 30 is fixedly installed on the moving plate 40. When the glass molding press mold 1 fixed to the moving plate 40 is moved to each process, mold dimensions are maintained and protected to prevent breakage and deformation of the glass molding press mold 1 during molding press working. After (s10) insert the intermediate mold 20 to the upper side of the lower mold 30 is installed. In this case, it is preferable to install the lower mold 30 by using the intermediate mold guide pin 200. (s20) A fixing hole into which the lens holder 4 can be inserted and fixed to the intermediate mold 20. One or more 210 may be formed.

The lens holder 40 is inserted into and fixed to the intermediate mold 20, and a ball glass similar to the lens volume is introduced. Ball glass is a material of the glass lens is changed to the lens 3 form by firing at a high temperature. In this case, when the volume of the ball glass is referred to as A and the volume of the finished lens is referred to as B, it is preferable to set the ball glass volume as A = B * 0.975 to 0.999. This is because the life of each core of the glass molding press die 1 can be prevented. In addition, a lower end surface of each of the lens holders 4 inserted into and fixed to the plurality of fixing holes 210 is in contact with an upper end surface of the lower mold 30. Therefore, when manufacturing a plurality of coupling lenses, all of the lower end surfaces serving as mounting reference surfaces of the respective lens holders 4 are provided on the upper end faces of the lower molds 30 having the same height, so that the lens holders 4 are in the lens holder 4. The distance between the lenses are all the same, there is an advantage to manufacture a lens (3) that can reduce the alignment error for the optical axis. As a result, the defective rate of the coupling lens is extremely low.

Thereafter, the upper mold 10 composed of the upper core 110 and the upper holder 100 is coupled to the lower mold (10) by the intermediate mold guide pin 200 and the upper mold guide pin 120. 20). (S40) After the combination is performed by a molding press working, by pressing only the upper core 110, the user first adjusts the height of the lens set arbitrarily. Lens height adjustment is preferably to use a metal ring in order to adjust to the press height of the glass molding press die (1), it can be adjusted even without the metal ring. The metal ring is coupled to the outer diameter of the glass molding press die 1. The temperature for forming the ball glass is preferably heated to about 100 to 115% of the yield point (At) of the glass. When the upper core 110 protruding from the upper mold 10 is pressed by the protruding length, the ball glass is gradually formed into a lens shape (s50). At this time, in order to prevent oxidation of the lens holder 4 In the glass molding press mold 1, it is preferable to maintain the nitrogen state or reduce the oxygen concentration to prevent oxidation. After the molding press working of the coupling lens is finished, the temperature inside the press die is cooled to a temperature that opens the plurality of coupling lenses.

Although the present invention described above has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

1 is a cross-sectional view showing a glass molding press mold for manufacturing a conventional coupling lens.

2 is a view illustrating an embodiment of a glass molding press mold for manufacturing a plurality of coupling lenses according to the present invention.

3 is a diagram of another embodiment of a glass molding press mold for producing a plurality of coupling lenses in accordance with the present invention.

4 is a diagram of an embodiment of an intermediate mold of a glass molding press mold for producing a plurality of coupling lenses according to the present invention.

5 is a view of another embodiment of a glass molding press mold for producing a plurality of coupling lenses in accordance with the present invention.
6 is a diagram of another embodiment of a glass molding press mold for producing a plurality of coupling lenses in accordance with the present invention.

7 is a flowchart illustrating a manufacturing procedure of the glass molding press die according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: glass molding press mold 2: conventional glass molding press mold

3: lens 4: lens holder

10: upper mold 100: upper holder

110: upper core 120: upper mold guide pin

20: intermediate mold 200: intermediate mold guide pin

210: fixing hole 220: gas discharge groove

30: lower mold 300: lower holder

310: upper core 320: protrusion protection groove

40: moving plate

Claims (5)

In the press mold for manufacturing a coupling lens comprising a lens for passing light and a lens holder which is a metal housing for receiving and fixing the lens, An upper mold including an upper holder and a plurality of upper cores; A lower mold including a lower holder and a plurality of lower cores; Is disposed between the upper mold and the lower mold, a fixing hole is formed in each of the portions corresponding to the plurality of the upper core and the lower core, the intermediate for inserting and fixing the lens holder to each of the fixing hole during the molding press mold; An intermediate mold guide pin for coupling the intermediate mold to the upper mold and the lower mold; And Glass molding press mold for manufacturing a plurality of coupling lenses comprising a; up and down drive for driving the upper mold relatively up and down relative to the lower mold. 2. The plurality of coupling lenses of claim 1, wherein the intermediate mold uses any one of a structure for resistance welding by a laser stem and a structure for laser welding to an optical transceiver housing. Glass molding press mold for manufacturing. The plurality of couplings of claim 1, wherein the upper holder portion or the lower holder portion has a protrusion protecting groove formed at a predetermined portion of the lens holder in contact with the protrusion of the lens holder to protect the protrusion formed under the lens holder. Glass molding press mold for manufacturing the lens. The plurality of couplings of claim 1, further comprising a moving plate installed below the lower mold and configured to maintain and protect the size of the mold when the glass molding press die is moved by a plurality of processes. Glass molding press mold for manufacturing the lens. The glass molding press mold of claim 1, wherein a lower surface of the lens holder inserted into and fixed to the intermediate mold is in contact with an upper surface of the lower mold.

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