KR101774822B1 - Molding apparatus for manufacturing lens with taper pin - Google Patents
Molding apparatus for manufacturing lens with taper pin Download PDFInfo
- Publication number
- KR101774822B1 KR101774822B1 KR1020150134149A KR20150134149A KR101774822B1 KR 101774822 B1 KR101774822 B1 KR 101774822B1 KR 1020150134149 A KR1020150134149 A KR 1020150134149A KR 20150134149 A KR20150134149 A KR 20150134149A KR 101774822 B1 KR101774822 B1 KR 101774822B1
- Authority
- KR
- South Korea
- Prior art keywords
- core
- core plate
- plate
- taper pin
- lens
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/0048—Moulds for lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
- B29C45/2606—Guiding or centering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
Abstract
The present invention relates to a lens mold apparatus having a cassette-type structure, and a lens mold apparatus having a cassette structure inserted into a mounting frame, wherein a spool is formed at a central portion, A lower core plate formed at a position opposite to the upper core plate and forming a runner and a gate by engagement with the upper core plate, Which is fixed to the core receiving portion of the lower core plate at a position facing the upper core and the lower core plate and which is coupled to the upper core plate and the lower core plate, Core, wherein the core is fixed on the core plate An upper taper pin formed on the upper core plate and having a receiving groove formed in a lower portion thereof so as to be tapered; a lower taper pin formed on the lower core plate, And the upper core plate and the lower core plate are coupled to each other by a taper pin including a lower taper pin having a protrusion formed to be tapered. Accordingly, the present invention can provide a lens mold apparatus in which a core is fixed to a core plate to form a unitary cassette type structure, and an upper core plate and a lower core plate are guided by a taper pin to improve precision, Compared with the apparatus for implementing the ejection method by driving the core, the structure is very simple, which is advantageous in reducing the manufacturing time to a certain extent, and it is advantageous to realize high precision of the apparatus by simplifying the structure.
Description
The present invention relates to a lens mold apparatus having a cassette type structure inserted into a mounting frame, in particular, a core is fixed to a core plate to form an integral cassette type structure, and an upper core plate and a lower core plate are guided by a taper pin To a lens mold apparatus equipped with a taper pin having improved precision.
2. Description of the Related Art [0002] Recently, the use of mobile phone cameras and digital cameras has been increasing, and demands for diversification of services, such as photographing, image transmission, or communication, have been intensified.
Particularly, in the camera lens module of a mobile phone camera, the demand for the camera lens module is getting stronger. In addition, an extended new concept mobile phone, a so-called camera phone or camara mobile phone, And a camera lens module having an imaging device of 3 megapixel or more in accordance with a demand for high performance has been actively studied.
In order to realize such high-quality and high-performance functions of more than 3 megapixels, at least three to six lenses should be used, and aspherical plastic lenses capable of controlling various types of aberrations are mainly used.
With the increasing use of such plastic lenses, lenses are manufactured by an injection molding method using a lens mold apparatus. Generally, a lens mold apparatus is manufactured by using a processing equipment such as a diamond turning machine (DTM), and a lens is manufactured by injecting resin and injecting it.
1, 2, and 3, the conventional lens mold apparatus has a cassette structure to be inserted into a receiving
The conventional
After injection molding, molding, and cooling of the resin in the
In order to drive such a core, an ejecting
In addition, since a constant gap should be formed between the core plate and the core for easy driving of the core, the gap is further increased as the temperature of the core plate increases when the molten lens is injected, So that the accuracy of the lens is lowered.
In addition, since the conventional core is mainly involved in manufacturing the shape of the lens, and the outer diameter of the lens is determined by the shape of the upper core plate and the lower core plate, that is, , There is a problem that the precision of the lens is further lowered.
Further, since the shape and the outer diameter of the lens are determined by the core and the core plate, when the lens is to be changed in size, the entire core and the core plate must be replaced, so that it is not easy to change the dimensions, have.
In addition, gas is inevitably generated in the process of injecting and cooling the resin, and the shape of the lens depends on the emission of the gas. In the case of the conventional lens mold apparatus of the core driving type, So that it is necessary to separate the core to remove the contaminated gas due to fusion of the gas. Therefore, it is troublesome and difficult to remove the contamination.
In addition, since the core is directly coupled to the plate, it is not possible to perform the adjustment according to the core dimension adjustment and the height deviation between the plates, and therefore, it is not easy to manufacture due to the need for highly accurate design and fabrication.
Further, since the guide pins for guiding the upper core plate and the lower core plate are formed in a straight shape, the precision is lowered after a predetermined time, and eccentricity and de-centering problems are caused in the coupling of the upper core plate and the lower core plate.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a lens mold having a taper pin having a tapered pin which is guided by a taper pin, The purpose of the device is to provide.
According to an aspect of the present invention, there is provided a lens mold apparatus having a cassette structure inserted into a mounting frame, the apparatus comprising: an upper core plate having a core formed in a central portion thereof and formed with a core accommodating portion, A lower core plate formed at a position opposed to the core plate and forming a runner and a gate by engagement with the upper core plate, the lower core plate having a core receiving portion, an upper core fixedly coupled to the core receiving portion of the upper core plate, And a lower core fixedly coupled to the core receiving portion of the lower core plate at a position opposite to the upper core and forming a cavity in the coupling surface with the upper core by coupling the upper core plate and the lower core plate And the core is formed in a fixed shape on the core plate, An upper taper pin formed on the upper core plate and having a receiving groove tapered at a lower portion thereof; a lower taper pin formed on the lower core plate, And the upper core plate and the lower core plate are coupled to each other by a taper pin formed of a lower taper pin having a protruding portion. The present invention is directed to a lens mold apparatus having the taper pin.
In addition, it is preferable that the cavity is formed on a coupling surface between the upper core and the lower core, and the lens outer diameter forming portion is included in the core.
Preferably, upper and lower adjustment washers are formed at the upper end of the upper taper pin and the lower end of the lower taper pin, respectively, to adjust the dimensions of the taper pin.
Here, it is preferable that the upper support plate and the lower support plate are coupled to the upper side of the upper core plate and the lower side of the lower core plate, respectively, and the taper pin is coupled to the core plate with the upper adjustment washer and the lower adjustment washer interposed therebetween Do.
In addition, it is preferable that upper and lower adjusting washers are formed at the upper and lower cores in the core accommodating portion, respectively, to adjust the dimensions of the core.
Here, on the upper side of the upper core plate and the lower side of the lower core plate, the upper support plate and the lower support plate are coupled to each other, and the core is coupled to the core plate with the upper adjustment washer and the lower adjustment washer interposed therebetween .
Further, it is preferable that a center pin is formed on the lower side of the sprue, and an ejecting pin is formed on the lower side of the runner.
Further, it is preferable that the core receiving portions formed on the upper core plate and the lower core plate for joining the upper core and the lower core, respectively, are simultaneously processed by the DTM equipment.
Further, it is preferable that the upper core and the lower core are formed in an endless structure.
Preferably, the cavity is radially formed around the sprue. Specifically, the cavity may be formed of 12 cavities or 16 cavities.
The present invention provides a lens mold apparatus in which a core is fixed to a core plate to form an integral cassette type structure, and an upper core plate and a lower core plate are guided by a taper pin to improve precision.
In addition, compared with the conventional apparatus for implementing the ejection method by driving the core, the structure is very simple, which is advantageous in reducing the manufacturing time to a certain extent, and it is possible to realize high precision of the apparatus by simplifying the structure.
In addition, the adjustment washer according to the present invention is capable of adjusting the individual dimensions of the upper and lower cores, permitting the height deviation of the upper plate and the lower plate to be easily manufactured, and individually adjusting the height of the core up and down It is easy to perform the performance review, and it is easy to manufacture due to the restriction of the height when manufacturing the core, and it is possible to assemble even if there is a difference in height of the core.
As a result, it is very easy to adjust the dimensions of each component, and the height of the core can be adjusted, so that the shape of the cavity can be adjusted, and the control of the thickness and shape of the lens is facilitated.
Further, since there is no need for a gap between the core plate and the core by the fixed core, tilting and decentering of the core are minimized and the precision of the lens is improved.
Further, since the release of the gas generated during the lens molding by the fixed core system is performed along the parting line of the upper core plate and the lower core plate, it is possible to easily remove the fused gas, .
Further, since the cavity for lens molding is contained in the core, the shape and outer diameter of the lens can be simultaneously processed in the same part, so that the accuracy of the lens can be further improved. In the case of changing the lens size, So that it is easy to change the dimensions and the cost can be reduced.
In addition, according to the present invention, since the fixed core system is implemented, ejection of the lens forming part, runner and gate part is performed by ejecting the runner part by the center pin and the ejecting pin, There is an effect that the stress applied to the lens is minimized while the damage of the lens is prevented, and the precision of the lens is further improved.
1 is a schematic view of a main part of a lens mold apparatus according to the prior art;
Fig. 2 is a schematic view showing a lower core plate in which a cavity according to the related art is formed; Fig.
Fig. 3 is a side view schematically showing a main part of a lens mold apparatus according to the prior art; Fig.
4 is a schematic view of a main part of a lens mold apparatus having a taper pin according to the present invention.
5 is a schematic view showing a lower core plate according to the present invention.
Fig. 6 is a schematic view of a lower core plate having a cavity formed therein according to the present invention ((a) a plan cut incision view, and (b) a vertical incision three-dimensional schematic view).
FIG. 7 is a schematic view of a lens mold apparatus provided with a taper pin according to the prior art and the present invention ((a) prior art, (b) present invention).
FIG. 8 is a plan view of a lens mold apparatus having a taper pin according to the prior art and the present invention ((a) prior art, (b) present invention).
FIG. 9 is a view showing a state of the prior art and a cavity arrangement according to the present invention ((a) prior art, (b) 12 cavities, and (c) 16 cavities).
The present invention relates to a lens mold apparatus having a cassette type structure inserted into a mounting frame, wherein a core is fixed to a core plate to form an integral cassette type structure, wherein an upper core plate and a lower core plate are guided by a taper pin, The present invention relates to a lens mold apparatus with improved performance.
Particularly, since the core is fixedly coupled to the core plate, the structure is very simple compared to the apparatus for implementing the ejection method by the conventional core driving, which is advantageous in shortening the manufacturing schedule, and the high precision Can be implemented.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 5 is a schematic view showing a lower core plate according to the present invention, FIG. 6 is a schematic view of a lower core plate according to the present invention (FIG. 4 (a) (A) prior art, (b) present invention), and Fig. 8 is a schematic view of a prior art and a lens mold apparatus according to the present invention, FIG. 9 is a diagram showing a state of a cavity according to the related art and the present invention ((a) prior art, (b) ) 12 cavities, and (c) 16 cavities.
The lens mold apparatus according to the present invention includes an
The present invention is to produce a lens by an injection molding method using a lens mold apparatus. Generally, a lens mold apparatus is manufactured by using processing equipment such as a diamond turning machine (DTM) So that the lens is manufactured.
As shown in FIG. 4, the lens mold apparatus is a cassette structure to be inserted into the
Here, the mounting
A lens mold apparatus having a cassette structure to be accommodated in the mounting
4, the lens mold apparatus according to the present invention is formed in a cassette-type structure to be inserted into and coupled with the center of the mounting
The
The
The
Is guided by the taper pin (1000) formed at the four corners of the upper core plate (100) and the lower core plate (200) to be engaged at a fixed position.
The
4, the
The inner diameter of the receiving
As a result, the
5 and 6 show a
It is preferable that the cavity (c) is formed radially for efficient arrangement of the space, and it is possible to realize a larger number of cavities (c) as compared with the conventional arrangement, thereby improving the production efficiency. 9 (a)) by a complicated mold structure as shown in FIGS. 8 and 9, but in the present invention, in the cassette structure of the same size, 12 cavities (FIG. 9 (b) , Fig. 9 (c)).
6 (a) is a schematic plan view of the
The
That is, the upper and
Here, the cavity (c) is formed on a coupling surface between the
Since the conventional core is mainly concerned with the production of the shape of the lens and the outer diameter of the lens is determined by the shape of the
However, according to the present invention, the cavity (c) is completely formed in the core, so that not only the shape of the lens but also the outer diameter of the lens can be simultaneously processed inside the core. Thus, the accuracy of the lens can be further improved, Conventionally, the core and the entire plate have to be replaced. However, in the present invention, since only the core part needs to be replaced, the dimensions can be easily changed and the cost can be reduced.
An
4, an
An
An
The
Accordingly, the
The integrated cassette structure according to the present invention is different from the prior art in that the core and the taper pin are fixedly coupled to the plate through the adjustment washer so that the structure is very simple as compared with the apparatus for implementing the ejection method by the conventional core drive It is advantageous to shorten the manufacturing schedule, and simplification of the structure and simplification of the design can realize high precision of the apparatus.
FIG. 7 is a schematic view of a conventional lens mold apparatus (a) and a lens mold apparatus (b) according to the present invention. The lens mold apparatus of a cassette structure including a core according to the related art includes a
In order to drive such a core, an ejecting plate must be separately formed in the cassette below the fixed side plate, and an actuating part for actuating the ejecting plate must be formed. Therefore, the structure of the mold apparatus for core ejection driving is complicated do.
In addition, since a constant gap should be formed between the core plate and the core for easy driving of the core, the gap is further increased as the temperature of the core plate increases when the molten lens is injected, So that the accuracy of the lens is lowered.
Further, since the core and the taper pin are directly coupled to the plate, it is impossible to perform the adjustment according to the core dimension adjustment and the height deviation between the plates, and therefore, it is difficult to manufacture due to the need for highly accurate design and processing.
Further, since the guide pins for guiding the upper core plate and the lower core plate are formed in a straight shape, the precision is lowered after a predetermined time, and eccentricity and de-centering problems are caused in the coupling of the upper core plate and the lower core plate.
As shown in FIG. 7 (b), a lens mold apparatus according to the present invention is a system in which a core, rather than a core drive system, is fixedly coupled to a core plate, and an apparatus for implementing an ejection system by a conventional core drive So that it is possible to realize high precision of the device by simplifying the structure.
Since the gap between the core plate and the core is not required by the fixed core, the tilting and decentering phenomenon of the core can be minimized and the accuracy of the lens can be further improved. Further, Is formed only along the parting line of the
The
Also, by the implementation of the adjusting
These
As a result, it is very easy to adjust the dimensions of each component, and the height of the core can be adjusted, so that the shape of the cavity can be adjusted, and the control of the thickness and shape of the lens is facilitated.
For ejecting according to the present invention, a
That is, according to the present invention, the ejection of the lens forming part, the runner r, and the gate g is performed by the
The fixed core system according to the present invention is fixedly coupled to the plate to form a unitary cassette structure. By this, as shown in FIGS. 8 and 9, the spatial arrangement of the cavity (c) can be efficiently performed .
That is, the arrangement of the cavities c can be radially realized, and a larger number of cavities c can be realized as compared with the conventional arrangements (Figs. 8 (a) and 9 (a) .
The
After the
The core accommodated in the
As described above, the present invention provides a lens mold apparatus in which a core is fixed to a core plate to form a unitary cassette type structure, and an upper core plate and a lower core plate are guided by a taper pin to improve precision.
In addition, since the structure is very simple as compared with the apparatus for implementing the ejection method by the conventional core driving, the manufacturing is advantageous in reducing the size and the precision of the apparatus can be realized by simplifying the structure.
In addition, the adjustment washer can adjust the individual dimensions of the upper and lower cores, permitting the height deviation of the upper plate and the lower plate to be easily manufactured, and individually adjusting the height of the core up and down. Easy to manufacture, easy to manufacture due to less constraint on the height of the core, and it is possible to assemble even if there is a difference in height of the core. It is very easy to adjust the dimensions of each part and adjust the height of the core. So that it is easy to control the lens thickness and shape.
Further, since the fixed core does not need a gap between the core plate and the core, tilting or decentering of the core is minimized, thereby improving the precision of the lens.
Further, since the release of the gas generated during the lens molding by the fixed core system is performed along the parting line of the upper core plate and the lower core plate, it is possible to easily remove the fused gas, .
Further, since the cavity for lens molding is contained in the core, the shape and outer diameter of the lens can be simultaneously processed in the same part, so that the accuracy of the lens can be further improved. In the case of changing the lens size, It is easy to change the dimensions and the cost is reduced accordingly.
In addition, according to the present invention, since the fixed core system is implemented, ejection of the lens forming part, runner and gate part is performed by ejecting the runner part by the center pin and the ejecting pin, , The stress applied to the lens is minimized while the damage to the lens is prevented, thereby further improving the accuracy of the lens.
10: mounting frame 11: accommodating portion
100: upper core plate 200: lower core plate
300: upper core 310: upper adjustment washer
400: Lower core 410: Lower adjustment washer
500: upper support plate 600: lower support plate
700: Center pin 800: ejecting pin
900: Core receiving portion 1000: Taper pin
1100: upper taper pin 1110: receiving groove
1120: Upper adjustment washer 1200: Lower taper pin
1210: Outlet 1220: Lower adjustment washer
c: cavity s: spruce
r: runner g: gate
Claims (12)
An upper core plate formed with a spout in a central portion and formed with a core accommodating portion and driven up and down;
A lower core plate formed at a position opposed to the upper core plate and forming a runner and a gate by engagement with the upper core plate and having a core receiving portion;
An upper core fixedly coupled to the core receiving portion of the upper core plate; And
And a lower core fixedly coupled to the core receiving portion of the lower core plate at a position opposite to the upper core and forming a cavity in the coupling surface with the upper core by coupling the upper core plate and the lower core plate And a core is fixedly formed on the core plate to form a unitary cassette structure,
The cavity
A lens outer diameter forming portion formed on a coupling surface of the upper core and the lower core so as to be included in the core,
Ejecting the lens forming part, the runner and the gate part is performed by ejecting the runner part by a center pin formed on the lower side of the sprue and an ejecting pin formed on the lower side of the runner,
An upper taper pin formed on the upper core plate and having a receiving groove formed in a tapered shape in a lower portion thereof; a lower taper pin formed on the lower core plate and having a protruding portion formed in an upper portion of the upper core plate, Wherein the upper core plate and the lower core plate are guided by a taper pin formed of a taper pin.
Wherein the taper pin is formed in an endless structure.
Wherein the taper pin is formed of 12 cavities or 16 cavities.
Priority Applications (1)
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KR1020150134149A KR101774822B1 (en) | 2015-09-22 | 2015-09-22 | Molding apparatus for manufacturing lens with taper pin |
Applications Claiming Priority (1)
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KR1020150134149A KR101774822B1 (en) | 2015-09-22 | 2015-09-22 | Molding apparatus for manufacturing lens with taper pin |
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KR20170035422A KR20170035422A (en) | 2017-03-31 |
KR101774822B1 true KR101774822B1 (en) | 2017-09-06 |
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KR101957690B1 (en) * | 2017-09-25 | 2019-07-04 | 주식회사 세코닉스 | assembly structure of core and taper pin of the mold for lens injection |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4495585B2 (en) * | 2004-12-27 | 2010-07-07 | Hoya株式会社 | Resin lens mold |
KR101313815B1 (en) * | 2013-01-31 | 2013-09-30 | (주)옵토라인 | The lens mold that have a runner structure to spread out like the spokes of a wheel |
KR101394310B1 (en) * | 2013-03-05 | 2014-05-13 | 주식회사 백산사 | Color contact lens upper mold fixing device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101558056B1 (en) | 2013-11-21 | 2015-10-06 | 삼성전기주식회사 | Mold device for forming lens |
KR101548817B1 (en) | 2013-11-25 | 2015-08-31 | 삼성전기주식회사 | Mold device for forming lens |
KR101418473B1 (en) | 2014-02-06 | 2014-07-22 | 나노몰텍주식회사 | Molding device for camera lens |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4495585B2 (en) * | 2004-12-27 | 2010-07-07 | Hoya株式会社 | Resin lens mold |
KR101313815B1 (en) * | 2013-01-31 | 2013-09-30 | (주)옵토라인 | The lens mold that have a runner structure to spread out like the spokes of a wheel |
KR101394310B1 (en) * | 2013-03-05 | 2014-05-13 | 주식회사 백산사 | Color contact lens upper mold fixing device |
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