CN104690917B - A kind of LED-light guide component double injection corner flowing process method - Google Patents

A kind of LED-light guide component double injection corner flowing process method Download PDF

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Publication number
CN104690917B
CN104690917B CN201510096475.XA CN201510096475A CN104690917B CN 104690917 B CN104690917 B CN 104690917B CN 201510096475 A CN201510096475 A CN 201510096475A CN 104690917 B CN104690917 B CN 104690917B
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China
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corner
optical component
die cavity
mould die
injection mould
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CN201510096475.XA
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Chinese (zh)
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CN104690917A (en
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徐超
王昌威
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上海小糸车灯有限公司
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Abstract

A kind of LED-light guide component double injection corner flowing process method, using the double-layer injection mold that heavy wall optical component is molded, including respectively corresponding product section configuration be in the injection die cavities part of " convex " type and section configuration is in " matrix " quadric injection mould cavity portion, the basic cavity wall thickness that described quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner is set, and carries out wall thickness compensation adjustment:Increase described wall thickness variation successively, i.e. the outboard cavity wall thickness being used for being formed " recessed " type part of optical component corner as described quadric injection mould die cavity increases by 0.1 0.3mm, then the inner side cavity wall thickness of described quadric injection mould die cavity is corresponding reduces by 0.1 0.3mm.Thus, gradually increase and reduce described quadric injection mould die cavity respectively to be used for forming the radian curvature of the corner medial and lateral of optical component, unanimously so that there is not trapped gas defect when being molded in the flowing velocity of injection fluid passing through described quadric injection mould die cavity corner, arrival car light.

Description

A kind of LED-light guide component double injection corner flowing process method

Technical field:

The present invention relates to automobile lamp manufactures field and in particular to a kind of heavy wall layered light guide in LED-light guide component is noted It is used for the double injection layered light guide corner treatment method of corner treatment during moulding.

Background technology:

Since late nineteenth century birth, car light also experienced change from one generation to the next to automobile, from the first generation by fuel Directly burn illuminating source;Second filial generation incandescent light source;Third generation gas-discharge light source is up to forth generation semiconductor light emitting two Pole pipe (i.e. LED) light source.And the continuous renewal with LED technology and people are for the continuous lifting of car light aesthetic, The deriving technology light guide techniques of LED arise therewith.

Light guide therefor is used in automobile lighting system, except long service life, illuminating effect more preferably in addition to, even more significantly play The advantage of beautification automobile appearance.The different light guide therefor that gets more and more is devised.

LED light source, with respect to traditional halogen and gas photoelectricity light source, can deserve to be called cold light source, its external hot spoke Penetrate far below the conventional light source with power.After being applied to front car light illumination, the heatproof plastic material lens more very different than glass Just there is ample scope for abilities.

In addition, increasing automobile lamp is used as interior lens using photoconduction, using photoconduction as interior lens The cost of car light can not only be reduced, and low energy expenditure can be declined ensureing identical functional conditions, in addition, car light pattern Become attractive in appearance because of the use of light-strip.

At present, for the illumination of lamp, outward appearance and other effects before and after reinforcement car light, for the part hyper-thick pipe light of lens in car light The wall thickness led can reach more than 18mm.For shortening the production cycle to greatest extent, to improving the yield rate of product, described photoconduction Using the injection of heavy wall layered light guide.For example, as one kind of light guide therefor, join in heavy wall typically by using PC (Merlon) material Expect, or PMMA (polymethyl methacrylate) material is made.Because its wall thickness is larger, cool time is longer, therefore injection produces When can take the longer production cycle.Need for this, by reducing the production cycle method of heavy section casting layering injection, to improve Production efficiency.For example, carry out layered light guide injection using the double-layer injection mold being divided into the heavy wall photoconduction being molded twice.

But in layering because product structure is complicated, along with the flowing property of thermoplastic itself, will result directly in Produce bag-like flowing during flowing, produce trapped gas problem.

Generally, the trapped gas problem of PP, PVC part is more difficult is solved by tune machine.Because:

When moulding produces trapped gas problem, it is uneven generally all to occur material, or burns glue, turn white, produce slightly The phenomenons such as big folder stricture of vagina.Many trapped gas problems typically can be solved by tune machine (that is, the processing parameter setting adjustment of injection machine), Trapped gas position is finally made to become a tiny folder water wave or a unremarkable point.

But aborning, the moulding of PP material, if there is trapped gas problem, if not taking effective aerofluxuss measure, is difficult to Solved by tune machine, be not that to walk uneven material be exactly to burn glue or turn white.

Because of the easy cause burning glue, the trapped gas problem of PVC moulding typically compares and is difficult to resolve certainly.If there is trapped gas during production Problem, just frequently has the moulding turning white because of trapped gas in a large number and produces.Although it has been found that, it is possible to use steeped with boiled water before eating Method saving the moulding turning white, but, the moulding burning as trapped gas position, the method being much to seek at present is come Solve it.

On the other hand although by the exhaust capacity of reinforcement mould, the resistance that air pressure causes can be greatly reduced, right Solve thin-wall part and fill type difficult problem and have very big nation to help.But, if melt adhesive temperature is too high, the gas meeting that thermal decomposition produces Greatly increase, mould needs the gas of exclusion will increase, and certainly will easily cause trapped gas problem.

In addition, the trapped gas problem of PP, PVC part also directly affects outward appearance and the source reflection of product.For this reason, it may be necessary to open Wall thickness when product being layered before mould is effectively instructed, solve polymer flow during injection occur the flowing of irrational bag-like and Trapped gas problem.

Content of the invention:

For solving the above problems, it is an object of the invention to:

There is provided a kind of LED-light guide component double injection corner flowing process method, the double-deck note of above-mentioned LED-light guide component Mould the LED-light guide structure being used for automobile lighting system with corner flowing process method and layered light guide corner flowing process device The heavy wall layered light guide injection of part.According to the present invention, by means of CAE software, layering wall thickness is effectively instructed, it is more reasonable to provide Layered approach, thus, solve in injection moulding process, because the residual gas that plastics current difference causes cannot discharge mold cavity And the Forming Quality of the trapped gas defect causing and its affected product, and low qualification rate.

For achieving the above object, the LED-light guide component double injection of the present invention technology of corner flowing process method Scheme is as follows:

A kind of LED-light guide component double injection corner flowing process method, is molded twice, is used for thickness using being divided into The double-layer injection mold that wall optical component is molded,

Described heavy wall optical component from product section configuration be in " convex " type part and cooperation described in " convex " type part, product The section configuration of product is in " matrix " part constitute, as shown in the figure.

Described double-layer injection mold includes the injection molding in " convex " type for the section configuration corresponding to described product respectively Cavity segment and section configuration are in " matrix " quadric injection mould cavity portion, i.e. injection die cavities are used for forming optical component " convex " type part, quadric injection mould die cavity is used for being formed and " convex " type part cooperation of optical component " matrix " part, its feature It is,

Pre-set described quadric injection mould die cavity for forming inside and outside two sides of " recessed " type part of optical component corner Between basic cavity wall thickness,

Then to described quadric injection mould die cavity be used for formed optical component corner " recessed " type part inside and outside two sides it Between basic cavity wall thickness carry out wall thickness compensation adjustment,

That is, gradually increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, with When, gradually reduce described quadric injection mould die cavity for forming the radian curvature outside the corner of optical component,

By means of CAE software Moldflow, described quadric injection mould die cavity is used for being formed with the interior outside of optical component corner Wall thickness carries out being molded the flowing checking of fluid,

As flowed through described quadric injection mould die cavity for forming the corner of optical component, reaching the stream being molded fluid of car light Dynamic speed is consistent, then judge, during injection, trapped gas defect does not occur,

As flowed through described quadric injection mould die cavity for forming the corner of optical component, reaching the stream being molded fluid of car light Dynamic speed is inconsistent, then judge, during injection, trapped gas defect occurs,

Repeat the above steps, until flow through described quadric injection mould die cavity for forming the corner of optical component, reaching car The flowing velocity of the injection fluid of lamp is consistent.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

Described wall thickness compensation adjustment is:Described quadric injection mould die cavity is used for being formed with " recessed " the type portion of optical component corner Basic cavity wall thickness setting difference between inside and outside two sides divided,

Increase described wall thickness variation successively in units of 0.1-0.3mm, i.e. as described quadric injection mould die cavity is used for forming light The outboard cavity wall thickness leading " recessed " the type part at component corner increases 0.1-0.3mm, then described quadric injection mould die cavity is used for being formed The inner side cavity wall thickness of " recessed " type part of optical component corner reduces 0.1-0.3mm.

Thus, gradually increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, Meanwhile, gradually reduce described quadric injection mould die cavity for forming the radian curvature outside the corner of optical component.

According to the present invention, it is cooperation " convex " type in quadric injection mould die cavity " matrix ", will when polymer flow is to corner Produce track effect, that is, inner ring stream length is shorter than outer ring stream length, therefore inner ring flow velocity will be significantly faster than that outer ring flow velocity.And high molecular polymerization There is a kind of special flow behavior in thing, that is, preferentially to region flowing (wall thickness is bigger, and flow resistance is less) that flow resistance is little.Using this stream Dynamic characteristic, is adjusted to outboard sidewalls thickness, compensates current difference and solves irrational bag-like flowing.See Fig. 1.Mend not doing wall thickness When repaying, through corner flowing after, because the stream length of Internal and external cycle is inconsistent, will lead to inner ring flow velocity be faster than outer ring flow velocity formed bright Aobvious current difference, produces bag-like flowing, causes internal residual air cannot exclude.Therefore for quadratic form U shape product, need By wall thickness compensation adjustment, i.e. (inside and outside corner) side thickness setting difference about the section of diagram 4,5.Left and right base can be pre-set This wall thickness is 2.0mm, and adjustment left and right Wall-Thickness Difference is 0.25mm, increases wall thickness variation successively, thus, gradually in units of 0.25mm Increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, meanwhile, gradually reduce described Quadric injection mould die cavity is used for forming the radian curvature outside the corner of optical component, and by means of CAE software Moldflow Outboard sidewalls thickness is carried out be molded with the flowing checking of fluid, repeats this step, until ensureing, during injection, trapped gas defect does not occur.

According to the LED-light guide component double injection corner flowing process method of the present invention, described quadric injection mould die cavity For the cavity wall thickness between inside and outside two sides of " recessed " the type part forming optical component corner namely ultimately form product Quadratic form U shape wall thickness.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

Described quadric injection mould die cavity is used for the base between inside and outside two sides of " recessed " type part forming optical component corner This cavity wall thickness difference is 1.5-3.0mm.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

The basic wall thickness of left and right two side of described quadric injection mould die cavity is set to 2.0mm.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

Described quadric injection mould die cavity is used for the base between inside and outside two sides of " recessed " type part forming optical component corner This cavity wall thickness difference for 0.1-0.3mm. is

Increase described wall thickness variation successively in units of 0.1-0.3mm, i.e. as described quadric injection mould die cavity is used for forming light The outboard cavity wall thickness leading " recessed " the type part at component corner increases 0.1-0.3mm, then described quadric injection mould die cavity is used for being formed The inner side cavity wall thickness of " recessed " type part of optical component corner reduces 0.1-0.3mm.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

Described quadric injection mould die cavity is used for the base between inside and outside two sides of " recessed " type part forming optical component corner This cavity wall thickness difference is 0.2mm.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

The arc that described quadric injection mould die cavity is used for being formed inside and outside two sides of optical component corner " recessed " type part is spent respectively For 105-140 °.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

Described quadric injection mould die cavity is used for being formed the radian difference of inside and outside two sides of optical component corner " recessed " type part For 110-120 °.

LED-light guide component double injection according to the present invention with corner flowing process method it is characterised in that

On the corner midpoint is near with it for forming " recessed " type part of optical component corner for described quadric injection mould die cavity Other inside and outside two side cavity wall thickness also form difference, and described cavity wall thickness difference is 0.05-0.15mm.

Thus, gradually increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, Meanwhile, gradually reduce described quadric injection mould die cavity for forming the radian curvature outside the corner of optical component.

According to the layered light guide corner flowing process mould of the present invention, have the following advantages:

The present invention can be effectively improved mobile defect, solves the problems, such as trapped gas.

Flow process of the present invention is simple, workable.

Cost of the present invention is relatively low.

Brief description

The optical component corner schematic cross-section that Fig. 1 is formed for quadric injection mould die cavity.

Fig. 2 is the LED-light guide component double injection corner flowing process method flow schematic diagram of the present invention.

Fig. 3 is optical component schematic cross-section.

Fig. 4 is optical component schematic cross-section at Fig. 3 A-A.

Fig. 5 is the layered light guide corner outboard sidewalls thickness schematic diagram of the quadric injection mould die cavity of the present invention.

Fig. 6 is that the optical component of the quadric injection mould die cavity formation of the present invention uses schematic diagram.

Fig. 7 is the quadric injection mould die cavity schematic cross-section of the present invention.

In figure, 1 is the part that optical component section configuration is in " convex " type, and 2 is cooperation described " convex " type part, optical component Section configuration is in " matrix " part, 3 is optical component, and 4 is quadric injection mould die cavity for forming optical component corner The inner side cavity wall of " recessed " type part, 5 are used for for quadric injection mould die cavity forming the outside of " recessed " type part of optical component corner Cavity wall.

Specific embodiment

Embodiment

A kind of LED-light guide component double injection corner flowing process method, is molded twice, is used for thickness using being divided into The double-layer injection mold that wall optical component is molded.Described heavy wall optical component is by the portion that the section configuration of product is in " convex " type Point and described " convex " the type part of cooperation, the section configuration of product be in " matrix " and part constitute.

Described double-layer injection mold includes the injection molding in " convex " type for the section configuration corresponding to described product respectively Cavity segment and section configuration are in " matrix " quadric injection mould cavity portion, i.e. injection die cavities are used for forming optical component " convex " type part, quadric injection mould die cavity is used for being formed and " convex " type part cooperation of optical component " matrix " part.Described two Secondary injection die cavities are used for cavity wall thickness between inside and outside two sides of " recessed " type part forming optical component corner namely final Form the quadratic form U shape wall thickness of product.

The arc that described quadric injection mould die cavity is used for being formed inside and outside two sides of optical component corner " recessed " type part is spent respectively For 105-120 °.

Pre-set described quadric injection mould die cavity for forming inside and outside two sides of " recessed " type part of optical component corner Between basic cavity wall thickness, then described quadric injection mould die cavity is used for forming " recessed " type part of optical component corner Basic cavity wall thickness between inside and outside two sides carries out wall thickness compensation adjustment.

Described quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner Basic cavity wall thickness is respectively 2mm.Then, increase described wall thickness variation successively in units of 0.15mm. i.e., as described quadric injection mould The outboard cavity wall thickness that die cavity is used for being formed " recessed " type part of optical component corner increases 0.15mm, then described secondary injection plastotype The inner side cavity wall thickness that chamber is used for being formed " recessed " type part of optical component corner reduces 0.15mm.

In addition, be used for being formed " recessed " type part on the corner midpoint of optical component corner in described quadric injection mould die cavity With two side cavity wall thickness also form difference inside and outside near it, described cavity wall thickness difference is 0.05-0.15mm.

Thus, gradually increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, Meanwhile, gradually reduce described quadric injection mould die cavity for forming the radian curvature outside the corner of optical component.

By means of CAE software Moldflow, described quadric injection mould die cavity is used for being formed with the interior outside of optical component corner Wall thickness carries out flowing checking, as flowed through described quadric injection mould die cavity for forming the corner of optical component, reaching the note of car light The flowing velocity of creeping body is consistent, then judge, during injection, trapped gas defect does not occur, as flowed through described quadric injection mould die cavity for shape Become the flowing velocity of the corner of optical component, the injection fluid of arrival car light inconsistent, then judge to occur trapped gas scarce during injection Fall into.

Repeat the above steps, until flow through described quadric injection mould die cavity for forming the corner of optical component, reaching car The flowing velocity of the injection fluid of lamp is consistent.

According to the present invention, mobile defect can be effectively improved, solve the problems, such as trapped gas;Flow process of the present invention is simple, workable; Improve yield rate, the qualification rate of product.

Claims (9)

1. a kind of LED-light guide component double injection corner flowing process method, is molded twice, is used for heavy wall using being divided into The double-layer injection mold that optical component is molded,
Described heavy wall optical component is from part and " convex " type part, the product described in cooperation that the section configuration of product is in " convex " type Section configuration is in " matrix " part constitute,
Described double-layer injection mold includes the injection die cavities portion in " convex " type for the section configuration corresponding to described product respectively Point and section configuration be in " matrix " and quadric injection mould cavity portion, i.e. injection die cavities are used for forming " convex " of optical component Type part, quadric injection mould die cavity be used for being formed coordinate with " convex " type part of optical component " matrix " part it is characterised in that
Pre-set described quadric injection mould die cavity to be used between inside and outside two sides of " recessed " type part forming optical component corner Basic cavity wall thickness,
Then described quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner Basic cavity wall thickness carries out wall thickness compensation adjustment:
Gradually increase described quadric injection mould die cavity for forming the radian curvature inside the corner of optical component, meanwhile, gradually Reduce described quadric injection mould die cavity for forming the radian curvature outside the corner of optical component,
The outboard sidewalls that by means of CAE software Moldflow, described quadric injection mould die cavity is used for being formed with optical component corner are thick Carry out flowing checking,
As flowed through described quadric injection mould die cavity for forming the corner of optical component, reaching the flowing speed being molded fluid of car light Degree is consistent, then judge, during injection, trapped gas defect does not occur,
As flowed through described quadric injection mould die cavity for forming the corner of optical component, reaching the flowing speed being molded fluid of car light Degree is inconsistent, then judge, during injection, trapped gas defect occurs,
Repeat the above steps, until flow through described quadric injection mould die cavity for forming the corner of optical component, reaching car light The flowing velocity of injection fluid is consistent.
2. LED-light guide component double injection as claimed in claim 1 with corner flowing process method it is characterised in that institute Stating wall thickness compensation adjustment is:Described quadric injection mould die cavity is used for form inside and outside the two of " recessed " type part of optical component corner Basic cavity wall thickness setting difference between side,
Increase described wall thickness variation successively in units of 0.1-0.3mm, i.e. as described quadric injection mould die cavity is used for forming photoconduction structure The outboard cavity wall thickness of " recessed " type part of part corner increases 0.1-0.3mm, then described quadric injection mould die cavity is used for forming photoconduction The inner side cavity wall thickness of " recessed " the type part at component corner reduces 0.1-0.3mm.
3. LED-light guide component double injection as claimed in claim 2 with corner flowing process method it is characterised in that institute State the basic cavity wall thickness that quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner Difference is 1.5-3.0mm.
4. LED-light guide component double injection as claimed in claim 3 with corner flowing process method it is characterised in that institute The basic wall thickness stating left and right two side of quadric injection mould die cavity is set to 2.0mm.
5. LED-light guide component double injection as claimed in claim 2 with corner flowing process method it is characterised in that institute State the basic cavity wall thickness that quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner Difference is 0.1-0.3mm.
6. LED-light guide component double injection as claimed in claim 5 with corner flowing process method it is characterised in that institute State the basic cavity wall thickness that quadric injection mould die cavity is used between inside and outside two sides of " recessed " type part forming optical component corner Difference is 0.2mm.
7. LED-light guide component double injection as claimed in claim 1 with corner flowing process method it is characterised in that institute The radian stating inside and outside two sides that quadric injection mould die cavity is used for being formed optical component corner " recessed " type part is respectively 105-140 °.
8. LED-light guide component double injection as claimed in claim 7 with corner flowing process method it is characterised in that institute The radian stating inside and outside two sides that quadric injection mould die cavity is used for being formed optical component corner " recessed " type part is respectively 110-120 °.
9. LED-light guide component double injection as claimed in claim 1 or 2 with corner flowing process method it is characterised in that Described quadric injection mould die cavity is used for being formed " recessed " type part of optical component corner on the corner midpoint and inside and outside near it Two side cavity wall thickness also form difference.
CN201510096475.XA 2015-03-04 2015-03-04 A kind of LED-light guide component double injection corner flowing process method CN104690917B (en)

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CN105818325B (en) * 2016-04-01 2018-05-15 上海小糸车灯有限公司 Thick-sectional part enclosed is layered injection moulding process and its mould structure and lens product

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JP3536347B2 (en) * 1994-06-03 2004-06-07 株式会社デンソー Dimension adjustment method of resin molding die
US6881358B1 (en) * 1999-07-06 2005-04-19 Mems Optical Inc. Mold apparatus and method
JP4087818B2 (en) * 2004-06-09 2008-05-21 スタンレー電気株式会社 Method for forming thick light guide plate
CN100553924C (en) * 2006-01-18 2009-10-28 鸿富锦精密工业(深圳)有限公司 Forming die for optical element
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