CN104325606A - Aspherical plastic lens injection molding gate - Google Patents
Aspherical plastic lens injection molding gate Download PDFInfo
- Publication number
- CN104325606A CN104325606A CN201410579370.5A CN201410579370A CN104325606A CN 104325606 A CN104325606 A CN 104325606A CN 201410579370 A CN201410579370 A CN 201410579370A CN 104325606 A CN104325606 A CN 104325606A
- Authority
- CN
- China
- Prior art keywords
- cast gate
- gate
- plastic lens
- injection molding
- aspherical plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 26
- 238000001746 injection moulding Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 abstract description 4
- 230000003313 weakening effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an aspherical plastic lens injection molding gate. The aspherical plastic lens injection molding gate comprises a first gate communicated with a cavity of an aspherical plastic lens, a second gate communicated with the first gate and a melt channel communicated with the second gate, wherein one part, connected with the cavity, of the first gate is cone-shaped, while the part, far away from the cavity, of the first gate is gradually reduced in sectional area; the part, connected with the second gate, of the first gate is a cylinder of which the section is elliptical; the ratio of the sectional area of the first gate to the sectional area of the second gate is 1: (8-12). In this way, the aspherical plastic lens injection molding gate is capable of weakening the molecular orientation of the melt in the cavity and improving the quality of a lens.
Description
Technical field
The present invention relates to technical field of mold, particularly relate to a kind of aspherical plastic lens injection molding sprue.
Background technology
In recent years, plastic optics product with light weight, inexpensive, cost is low etc., and feature develops very fast at home and abroad, and expands to rapidly the every field of social life.High-precision aspheric surface plastic optical lens is one of primary optics of taking a picture, making a video recording in instrument, and its available light classes and grades in school injection-moulding plastic, its injection cycle is short, production efficiency is high, price is low.But the centerand edge thickness of plastic lens difference is comparatively large, needing during production to design novel mould structure, making lens plastic be unlikely to produce when cooling to shrink.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of aspherical plastic lens injection molding sprue, and the molecularly oriented of the melt in die cavity can be made to be weakened, and improves lens quality.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of aspherical plastic lens injection molding sprue is provided, the channel comprising the first cast gate communicated with the die cavity of aspherical plastic lens, the second cast gate communicated with described first cast gate and communicate with described second cast gate, the shape of the part that described first cast gate is connected with described die cavity is taper, sectional area away from the part of described die cavity reduces gradually, the part that described first cast gate is connected with described second cast gate is cross section is oval cylinder, and the ratio of the sectional area of described first cast gate and the sectional area of described second cast gate is 1:8 ~ 12.
In a preferred embodiment of the present invention, the length of described first cast gate is 1.0 ~ 2.0cm, and the length of described second cast gate is 0.3 ~ 0.8cm.
In a preferred embodiment of the present invention, the material of described first cast gate is transparent plastic material.
The invention has the beneficial effects as follows: a kind of aspherical plastic lens injection molding sprue of the present invention, be provided with two different cast gates, the ratio of the sectional area of the first cast gate and the sectional area of the second cast gate is 1:8 ~ 12, when melt flows into narrow and small second channel from channel, sectional area reduces suddenly, thus accelerate the flow velocity of melt, melt pours the first cast gate from the second cast gate again, flow velocity slows down again, melt can be made mixing further, last melt flows into die cavity with the state of laminar flow from the first cast gate, the molecularly oriented of the melt in die cavity is weakened, improve the quality of plastic lens.
Accompanying drawing explanation
Fig. 1 is the top view of a preferred embodiment of the present invention;
Fig. 2 is the front view of Fig. 1;
In accompanying drawing, the mark of each parts is as follows: 1, die cavity, the 2, first cast gate, the 3, second cast gate, and 4, channel.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
A kind of aspherical plastic lens injection molding sprue, comprise the first cast gate 2 communicated with the die cavity 1 of aspherical plastic lens, the second cast gate 3 communicated with described first cast gate 2 and the channel 4 communicated with described second cast gate 3, the shape of the part that described first cast gate 2 is connected with described die cavity 1 is taper, sectional area away from the part of described die cavity 1 reduces gradually, the part that described first cast gate 2 is connected with described second cast gate 3 is cross section is oval cylinder, the ratio of the sectional area of described first cast gate 2 and the sectional area of described second cast gate 3 is 1:8 ~ 12, in the present embodiment, the ratio of the sectional area of described first cast gate 2 and the sectional area of described second cast gate 3 is 1:10.The length of described first cast gate 2 is 1.0 ~ 2.0cm, and the length of described second cast gate 3 is 0.3 ~ 0.8cm, and in the present embodiment, the length of described first cast gate 2 is 1.2cm, and the length of described second cast gate 3 is 0.6cm.The material of described first cast gate 2 is transparent plastic material.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. an aspherical plastic lens injection molding sprue, it is characterized in that, the channel comprising the first cast gate communicated with the die cavity of aspherical plastic lens, the second cast gate communicated with described first cast gate and communicate with described second cast gate, the shape of the part that described first cast gate is connected with described die cavity is taper, sectional area away from the part of described die cavity reduces gradually, the part that described first cast gate is connected with described second cast gate is cross section is oval cylinder, and the ratio of the sectional area of described first cast gate and the sectional area of described second cast gate is 1:8 ~ 12.
2. a kind of aspherical plastic lens injection molding sprue according to claim 1, is characterized in that, the length of described first cast gate is 1.0 ~ 2.0cm, and the length of described second cast gate is 0.3 ~ 0.8cm.
3. a kind of aspherical plastic lens injection molding sprue according to claim 1, is characterized in that, the material of described first cast gate is transparent plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579370.5A CN104325606A (en) | 2014-10-27 | 2014-10-27 | Aspherical plastic lens injection molding gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579370.5A CN104325606A (en) | 2014-10-27 | 2014-10-27 | Aspherical plastic lens injection molding gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104325606A true CN104325606A (en) | 2015-02-04 |
Family
ID=52400474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410579370.5A Pending CN104325606A (en) | 2014-10-27 | 2014-10-27 | Aspherical plastic lens injection molding gate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104325606A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10193396A (en) * | 1997-01-14 | 1998-07-28 | Jsr Corp | Mold for injection molding and injection molding method |
| JP2000254945A (en) * | 1999-01-06 | 2000-09-19 | Sekisui Chem Co Ltd | Injection mold |
| US6488413B1 (en) * | 1999-06-09 | 2002-12-03 | Corning Cable Systems Llc | Gating system for high precision molding |
| CN1715034A (en) * | 2004-06-29 | 2006-01-04 | 柯尼卡美能达精密光学株式会社 | Injection mold and injection molding apparatus |
| CN203510641U (en) * | 2013-10-14 | 2014-04-02 | 宁海集友精密机械有限公司 | Injection molding pouring gate for optical plastic lens |
-
2014
- 2014-10-27 CN CN201410579370.5A patent/CN104325606A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10193396A (en) * | 1997-01-14 | 1998-07-28 | Jsr Corp | Mold for injection molding and injection molding method |
| JP2000254945A (en) * | 1999-01-06 | 2000-09-19 | Sekisui Chem Co Ltd | Injection mold |
| US6488413B1 (en) * | 1999-06-09 | 2002-12-03 | Corning Cable Systems Llc | Gating system for high precision molding |
| CN1715034A (en) * | 2004-06-29 | 2006-01-04 | 柯尼卡美能达精密光学株式会社 | Injection mold and injection molding apparatus |
| CN203510641U (en) * | 2013-10-14 | 2014-04-02 | 宁海集友精密机械有限公司 | Injection molding pouring gate for optical plastic lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150204 |