CN113787678A - Injection mold of multi-channel lens and molding method thereof - Google Patents

Injection mold of multi-channel lens and molding method thereof Download PDF

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Publication number
CN113787678A
CN113787678A CN202111011765.1A CN202111011765A CN113787678A CN 113787678 A CN113787678 A CN 113787678A CN 202111011765 A CN202111011765 A CN 202111011765A CN 113787678 A CN113787678 A CN 113787678A
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China
Prior art keywords
channel
forming
mold core
cavity
molding
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CN202111011765.1A
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Chinese (zh)
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CN113787678B (en
Inventor
李荣洲
谭沿河
姚雅兰
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Dongguan Jingcai Optics Co ltd
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Dongguan Jingcai Optics Co ltd
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Publication of CN113787678A publication Critical patent/CN113787678A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701Details not specific to hot or cold runner channels
    • B29C45/2708Gates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/34Moulds having venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00Optical elements, e.g. lenses, prisms
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention provides an injection mold of a multi-channel lens and a forming method thereof.A longitudinal runner is arranged in an upper template, a sealing lug is fixed at the bottom of the upper template, an upper forming female die cavity and a flat runner which are communicated are arranged at the bottom of the sealing lug, the flat runner is connected to the bottom end of the longitudinal runner, and the upper forming female die cavity is formed by splicing a plurality of first positive light coke forming surfaces which are arranged in an array; a positioning groove is arranged on the lower template, the bottom of the positioning groove is connected with a forming cavity, and a step-by-step forming module is arranged in the forming cavity; the step-by-step forming module comprises single mold core columns, the arrangement mode of the single mold core columns is the same as that of each first positive optical focus forming surface, a second positive optical focus forming surface is arranged at the top of each single mold core column, and the bottom of each single mold core column is connected with a lifting mechanism. The invention can obtain the multi-channel lens with clear edges among the internal channels by a step-by-step forming mode, but the connection structure among the single-channel lens bodies is stable and firm.

Description

Injection mold of multi-channel lens and molding method thereof
Technical Field
The invention relates to an injection mold, and particularly discloses an injection mold of a multi-channel lens and a forming method thereof.
Background
Injection molding is a method for producing and molding industrial products, and an injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate sizes. The lens is a transparent material with one or more curved surfaces, which is made of optical materials such as glass or resin, and can be used for structures such as lighting lamps, display modules and the like.
In the prior art, corresponding compound eye surface structures are arranged on two opposite surfaces of a cavity of an injection mold for manufacturing the multi-channel lens, after mold closing is carried out, heated and melted plastic is injected into the cavity from an injection molding machine at high pressure, and the multi-channel lens is obtained after cooling and solidification.
Disclosure of Invention
In view of the above, it is necessary to provide an injection mold for a multi-channel lens and a molding method thereof, which can process and obtain a multi-channel lens with clear inner channel edges.
In order to solve the problems of the prior art, the invention discloses an injection mold of a multi-channel lens, which comprises an upper backing plate, an upper template, a lower die holder and a lower backing plate which are sequentially arranged from top to bottom, wherein a longitudinal runner is arranged in the upper template, a sealing lug is fixed at the bottom of the upper template, an upper molding female die cavity and a horizontal runner which are communicated with each other are arranged at the bottom of the sealing lug, the horizontal runner is connected to the bottom end of the longitudinal runner, and the upper molding female die cavity is formed by splicing a plurality of first positive optical focus molding surfaces which are arranged in an array manner;
a positioning groove matched with the sealing lug is arranged on the lower template, the bottom of the positioning groove is connected with a forming cavity, a step-by-step forming module positioned right below the sealing lug is arranged in the forming cavity, and a lifting abdicating cavity is arranged in the lower die seat;
the step-by-step forming module comprises single mold core columns, the number of the single mold core columns is equal to that of the first positive optical focal forming surfaces, the arrangement mode of the single mold core columns is the same as that of each first positive optical focal forming surface, a second positive optical focal forming surface is arranged at the top of each single mold core column, and the bottom of each single mold core column is connected with a lifting mechanism located in the lifting yielding cavity.
Furthermore, one side of the longitudinal flow passage is connected with an air exhaust passage which inclines upwards, and one end of the air exhaust passage, which is far away from the longitudinal flow passage, is connected with a vacuum generator.
Furthermore, the first positive optical focus forming surface and the second positive optical focus forming surface are both aspheric surfaces.
Furthermore, the opening area of one end of the horizontal runner, which is close to the upper molding concave cavity, is smaller than that of the other end of the horizontal runner.
Further, the lifting mechanism is an air cylinder.
Furthermore, a cooling flow channel is arranged in the single mold core column, and two ends of the cooling flow channel are respectively connected with a refrigerant inlet pipe and a refrigerant outlet pipe.
Furthermore, the cooling flow channel is in an inverted U shape.
Furthermore, a die core seat is connected between the lifting mechanism and the single die core column, and the single die core column is detachably connected to the die core seat.
The invention also discloses a molding method of the injection mold of the multi-channel lens, which sequentially comprises the following steps:
s1, closing the upper template and pressing the upper template onto the lower template, blocking the sealing lug in the positioning groove, starting from one end close to the flat runner, forming a first injection molding single cavity between the first single mold core column and the opposite first positive optical coke forming surface, connecting the other single mold cores to the bottom of the upper forming mold cavity and blocking the side surface of the first injection molding single cavity, injecting molten plastic into the first injection molding single cavity through the longitudinal runner and the flat runner, and forming a first single-channel lens body after cooling forming;
s2, driving the first single mold core column to descend to form a gap between the first single mold core column and the opposite first positive optical focal molding surface, driving the second single mold core column to descend to form a second injection molding single cavity between the second single mold core column and the opposite first positive optical focal molding surface, injecting molten plastic into the second injection molding single cavity through the longitudinal flow channel, the flat flow channel and the gap, ascending the first single mold core column until the gap is blocked, and forming a second single-channel lens body in the second injection molding single cavity after cooling molding;
s3, repeating the step S2 until all single-channel lens bodies are obtained through processing, and splicing all the single-channel lens bodies into a multi-channel lens with clear internal channel edges;
and S4, opening the upper template to separate the upper template from the lower template, keeping the sealing lug away from the positioning groove, and respectively driving the single mold core columns to ascend by the lifting mechanisms to eject the multi-channel lens.
The invention has the beneficial effects that: the invention discloses an injection mold of a multi-channel lens and a molding method thereof, wherein a special distribution molding module is arranged, a sealed molding cavity space can be formed after mold assembly, a multi-channel lens structure with clear edges among internal channels can be obtained through a step-by-step molding mode, the manufactured multi-channel lens has excellent multi-channel modulation performance, information crosstalk among different optical channels can be effectively avoided, the manufactured multi-channel structure is stable and reliable, and although clear edges are formed inside, the connection structure among single-channel lens bodies is stable and firm.
Drawings
FIG. 1 is a schematic view of a multi-channel lens injection mold according to the present invention in an open mold configuration.
FIG. 2 is a schematic structural diagram of the multi-channel lens injection mold during mold closing and injection molding.
The reference signs are: the mold comprises an upper base plate 10, an upper mold plate 20, a longitudinal flow channel 21, a sealing bump 22, an upper molding concave cavity 23, a first positive optical coke molding surface 231, a horizontal flow channel 24, an air exhaust channel 25, a vacuum generator 251, a lower mold plate 30, a positioning groove 31, a molding cavity 32, a lower mold base 40, a lifting abdicating cavity 41, a lower base plate 50, a step-by-step molding module 60, a single mold core column 61, a second positive optical coke molding surface 611, a cooling flow channel 612, a lifting mechanism 62, a refrigerant inlet pipe 621, a refrigerant outlet pipe 622 and a mold core base 63.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 and 2.
The embodiment of the invention discloses an injection mold of a multi-channel lens, the mold opening state is shown in figure 1, the injection mold comprises an upper cushion plate 10, an upper mold plate 20, a lower mold plate 30, a lower mold base 40 and a lower cushion plate 50 which are sequentially arranged from top to bottom, a longitudinal runner 21 which simultaneously penetrates through the upper cushion plate 10 is arranged in the upper mold plate 20, a sealing convex block 22 is fixed at the bottom of the upper mold plate 20, a communicated upper molding concave mold cavity 23 and a communicated lower runner 24 are arranged at the bottom of the sealing convex block 22, the lower runner 24 is connected to the bottom end of the longitudinal runner 21, the upper molding concave mold cavity 23 is formed by splicing a plurality of first positive optical focus molding surfaces 231 which are arranged in an array manner, and the first positive optical focus molding surfaces 231 are upwards sunken to manufacture optical surfaces for obtaining positive optical focus;
a positioning groove 31 matched with the sealing lug 22 is formed in the lower template 30, a forming cavity 32 is connected to the bottom of the positioning groove 31, a step-by-step forming module 60 located right below the sealing lug 22 is arranged in the forming cavity 32, and a lifting abdicating cavity 41 is formed in the lower die holder 40;
the step-by-step forming module 60 comprises single mold core columns 61 with the number equal to that of the first positive optical focus forming surfaces 231, the single mold core columns 61 are quadrangular prisms, side walls between the single mold core columns 61 are in close contact, all the single mold core columns 61 are in close contact with the inner walls of the forming cavities 32, the arrangement mode of the single mold core columns 61 is the same as that of each first positive optical focus forming surface 231, a second positive optical focus forming surface 611 is arranged at the top of each single mold core column 61, the second positive optical focus forming surface 611 is recessed downwards to form an optical surface for obtaining positive optical focus, and the bottom of each single mold core column 61 is connected with a lifting mechanism 62 located in the lifting abdicating cavity 41.
In this embodiment, one side of the longitudinal flow channel 21 is connected with an inclined upward pumping channel 25, one end of the pumping channel 25, which is far away from the longitudinal flow channel 21, is connected with a vacuum generator 251, and excess gas inside the molding cavity 32 can be pumped out through the vacuum generator 251, so as to ensure reliable molding effect, and in addition, the inclined pumping channel 25 can prevent molten plastic from flowing into the pumping channel 25 in the injection molding process.
In the present embodiment, the first positive focal plane 231 and the second positive focal plane 611 are both aspheric, which can improve the light modulation effect of the obtained multi-channel lens surface.
In this embodiment, the opening area of the end of the horizontal runner 24 close to the upper molding cavity 23 is smaller than the area of the other end, which can effectively reduce the difficulty of cutting the nozzle after molding.
In this embodiment, the lifting mechanism 62 is a cylinder, and the cylinder can drive the single mold core column 61 to realize stable lifting movement.
In this embodiment, a cooling channel 612 is disposed in the single mold core column 61, two ends of the cooling channel 612 are respectively connected to a coolant inlet pipe 621 and a coolant outlet pipe 622, and a cooling medium enters the cooling channel 612 from the coolant inlet pipe 621 and flows out from the coolant outlet pipe 622, so that reliable cooling of the single mold core column 61 can be achieved, and the efficiency of step-by-step molding can be effectively improved.
Based on the above embodiment, the cooling channel 612 has an inverted U-shape.
In this embodiment, each lifting mechanism 62 is connected with the mold core seat 63 between each single mold core column 61 respectively, and the single mold core column 61 can be detachably connected to the mold core seat 63, and can be provided with the single mold core column 61 of different second positive optical focus molding surfaces 611 as required, so as to adapt to the processing of multi-channel lenses with different surface types, and the universality is strong.
The embodiment of the invention also discloses a method for forming the injection mold of the multi-channel lens, which sequentially comprises the following steps:
s1, closing the upper mold plate 20 and pressing it onto the lower mold plate 30, as shown in fig. 2, the sealing protrusion 22 is blocked in the positioning groove 31, and a first injection molding monomer cavity is formed between the first monomer mold core column 61 and the opposite first positive optical focus forming surface 231, as counted from the end close to the flat runner 24, the other monomer mold cores are connected to the bottom of the upper forming mold cavity and blocked at the side of the first injection molding monomer cavity, and molten plastic is injected into the first injection molding monomer cavity through the longitudinal runner 21 and the flat runner 24, and a first single channel mirror body is formed in the first injection molding monomer cavity after cooling forming;
s2, driving the first single mold core column 61 to descend to form a gap between the first molding surface 231 and the second molding surface, and injecting molten plastic into the second molding surface through the longitudinal flow channel 21, the horizontal flow channel 24 and the gap, wherein the first single mold core column 61 ascends to block the gap, the first single mold core column 61 blocks one side of the second molding surface, and a second single channel lens is formed in the second molding surface after cooling molding;
s3, repeating the step S2 until all single-channel lens bodies are obtained through processing, and splicing all the single-channel lens bodies into a multi-channel lens with clear internal channel edges;
s4, opening the upper template 20 to separate from the lower template 30, separating the sealing projection 22 from the positioning groove 31, and driving the monomer mold core columns 61 to ascend by the lifting mechanisms 62 respectively to eject the multi-channel lens.
When the evacuation path 25 and the vacuum generator 251 are provided, in step S1, after mold closing, the molding cavity 32 is evacuated, and then each of the single mold core pillars 61 is driven to move correspondingly.
When the cooling flow passage 612 is arranged, efficient cooling can be performed on each single mold core column 61, and the cooling forming efficiency can be effectively improved in a relatively energy-saving mode.
The invention can obtain the multi-channel lens structure with clear edges among the internal channels by a step-by-step forming mode, can effectively solve the limitation that the multi-channel lens in the prior art only has surface profile, and the manufactured multi-channel lens has excellent multi-channel modulation performance, can effectively avoid information crosstalk among different optical channels, and has stable and reliable manufactured multi-channel structure, and the connection structure among the channels is stable and firm although clear edges are formed inside.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. The injection mold of the multi-channel lens comprises an upper padding plate (10), an upper template (20), a lower template (30), a lower die holder (40) and a lower padding plate (50) which are sequentially arranged from top to bottom, and is characterized in that a longitudinal flow channel (21) is arranged in the upper template (20), a sealing convex block (22) is fixed at the bottom of the upper template (20), an upper molding concave die cavity (23) and a flat flow channel (24) which are communicated with each other are arranged at the bottom of the sealing convex block (22), the flat flow channel (24) is connected to the bottom end of the longitudinal flow channel (21), and the upper molding concave die cavity (23) is formed by splicing a plurality of first positive light coke molding surfaces (231) which are arranged in an array;
a positioning groove (31) matched with the sealing lug (22) is formed in the lower template (30), a molding cavity (32) is connected to the bottom of the positioning groove (31), a step-by-step molding module (60) located right below the sealing lug (22) is arranged in the molding cavity (32), and a lifting abdicating cavity (41) is arranged in the lower die holder (40);
the step-by-step forming module (60) comprises single mold core columns (61) with the number equal to that of the first positive optical focal forming surfaces (231), the arrangement mode of the single mold core columns (61) is the same as that of the first positive optical focal forming surfaces (231), the top of each single mold core column (61) is provided with a second positive optical focal forming surface (611), and the bottom of each single mold core column (61) is connected with a lifting mechanism (62) located in the lifting abdicating cavity (41).
2. An injection mould for a multi-channel lens according to claim 1, characterized in that a suction channel (25) inclined upwards is connected to one side of said longitudinal channel (21), and a vacuum generator (251) is connected to the end of said suction channel (25) remote from said longitudinal channel (21).
3. An injection mold for a multi-channel lens according to claim 1, wherein the first positive focal molding surface (231) and the second positive focal molding surface (611) are both aspheric.
4. An injection mold for a multi-channel lens according to claim 1, wherein the opening area of the flat runner (24) near one end of the upper molding cavity (23) is smaller than that of the other end.
5. An injection mold for a multi-channel lens according to claim 1, wherein the elevating mechanism (62) is a pneumatic cylinder.
6. The injection mold for a multi-channel lens as claimed in claim 1, wherein a cooling channel (612) is disposed in the single mold core column (61), and two ends of the cooling channel (612) are respectively connected to a cooling medium inlet pipe (621) and a cooling medium outlet pipe (622).
7. An injection mold for a multi-channel lens according to claim 6, wherein said cooling channel (612) is in the shape of an inverted U.
8. The multi-channel lens injection mold of claim 1, wherein a mold core seat (63) is connected between the lifting mechanism (62) and the single mold core column (61), and the single mold core column (61) is detachably connected to the mold core seat (63).
9. A method of forming an injection mold based on a multi-channel lens as claimed in any one of claims 1 to 8, comprising the steps of:
s1, closing the upper template (20) and pressing the upper template onto the lower template (30), blocking the sealing bump (22) in the positioning groove (31), starting from one end close to the flat runner (24), forming a first injection molding single cavity between the first single mold core column (61) and the opposite first positive optical coke forming surface (231), connecting other single mold cores to the bottom of the upper molding mold cavity and blocking the side surface of the first injection molding single cavity, injecting molten plastic into the first injection molding single cavity through the longitudinal runner (21) and the flat runner (24), and forming a first single-channel mirror body after cooling forming;
s2, driving the first single mold core column (61) to descend to form a gap with the opposite first positive optical focus forming surface (231), driving the second single mold core column (61) to descend to form a second injection molding single cavity with the opposite first positive optical focus forming surface (231), injecting molten plastic into the second injection molding single cavity through the longitudinal flow channel (21), the horizontal flow channel (24) and the gap, ascending the first single mold core column (61) until the gap is blocked, and forming a second single channel lens body in the second injection molding single cavity after cooling forming;
s3, repeating the step S2 until all single-channel lens bodies are obtained through processing, and splicing all the single-channel lens bodies into a multi-channel lens with clear internal channel edges;
s4, opening the upper template (20) and separating the upper template from the lower template (30), keeping the sealing convex block (22) away from the positioning groove (31), and driving the monomer mold core columns (61) to ascend by the lifting mechanisms (62) respectively to eject the multi-channel lens.
CN202111011765.1A 2021-08-31 2021-08-31 Injection mold of multichannel lens and molding method thereof Active CN113787678B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116100753A (en) * 2023-02-13 2023-05-12 广州市旭胜模具有限公司 Adjustable automobile shell injection mold

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JP2004314464A (en) * 2003-04-17 2004-11-11 Olympus Corp Mold device and optical element
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WO2012055046A1 (en) * 2010-10-27 2012-05-03 Dbm Reflex Enterprises Inc. Lens array assembly for solid state light sources and method
TW202015893A (en) * 2018-10-25 2020-05-01 均賀科技股份有限公司 Structure of plastic injection mold for optical lens to achieve practical efficacies of high precision production and fast mold assembling
CN111196015A (en) * 2020-01-22 2020-05-26 东莞市嘉誉光学技术有限公司 Injection mold of optical lens
CN212045827U (en) * 2020-02-20 2020-12-01 东莞晶彩光学有限公司 Step-by-step molding optical lens injection mold
CN212147395U (en) * 2020-01-20 2020-12-15 东莞市万德光电科技有限公司 Compound-eye lens and lampshade same-mold different-outlet type mold

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004314464A (en) * 2003-04-17 2004-11-11 Olympus Corp Mold device and optical element
CN101209890A (en) * 2006-12-30 2008-07-02 株式会社住田光学玻璃 Glass lens forming device and glass lens forming method
WO2012055046A1 (en) * 2010-10-27 2012-05-03 Dbm Reflex Enterprises Inc. Lens array assembly for solid state light sources and method
TW202015893A (en) * 2018-10-25 2020-05-01 均賀科技股份有限公司 Structure of plastic injection mold for optical lens to achieve practical efficacies of high precision production and fast mold assembling
CN212147395U (en) * 2020-01-20 2020-12-15 东莞市万德光电科技有限公司 Compound-eye lens and lampshade same-mold different-outlet type mold
CN111196015A (en) * 2020-01-22 2020-05-26 东莞市嘉誉光学技术有限公司 Injection mold of optical lens
CN212045827U (en) * 2020-02-20 2020-12-01 东莞晶彩光学有限公司 Step-by-step molding optical lens injection mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116100753A (en) * 2023-02-13 2023-05-12 广州市旭胜模具有限公司 Adjustable automobile shell injection mold
CN116100753B (en) * 2023-02-13 2023-08-22 广州市旭胜模具有限公司 Adjustable automobile shell injection mold

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