CN1174853C

CN1174853C - Method and apparatus for moulding lens of car light

Info

Publication number: CN1174853C
Application number: CNB001290398A
Authority: CN
Inventors: 殿�信也; 殿岡信也
Original assignee: Koito Manufacturing Co Ltd
Current assignee: Koito Manufacturing Co Ltd
Priority date: 1999-09-16
Filing date: 2000-09-18
Publication date: 2004-11-10
Anticipated expiration: 2020-09-18
Also published as: CN1288814A; JP2001079902A

Abstract

This method for molding a lighting unit lens for a vehicle which has a sunning-around part running from a front part facing almost forward to a front side and bending forward to a side of lens also has a seal leg projecting almost backward from an outer peripheral edge part. Lens has an extension part along the sunning-around part and so as to form a recess whose direction is related to the molding direction. In addition, the method comprises at least a first molding process to form each part of the lens excepting the seal leg of a part corresponding to the running-around part and a second molding process to form the seal leg and the like corresponding to the running-around part which is not formed in the first molding process.

Description

The method and apparatus of moulding lens of car light

Technical field

This invention is that this application is incorporated herein by reference in the continuity of the Japanese patent application Hei.11-261853 of submission on September 16th, 1999.

The present invention relates to use the injection molding method to be formed for the novel method of moulding and the equipment of lens of car light.

Background technology

For lens 101 traditional, that be applied to car light, as shown in Figure 7, encapsulation pin 102 is to make by the method that the peripheral part from lens 101 extends back substantially, makes it to link to each other with a lamp body (not expressing in the accompanying drawings).

Lens 101 have a bent angle part 103, and its extends and to be bent to the one side, and the direction relevant recess of bent angle when one direction is partly arranged with lens 101 moldings.Therefore, for molded package pin 102 on the position that constitutes recess, except main mould 104 and 105, also need a sliding die 106.Like this, when hardening of resin,, will form a so-called slide mark trace 107 along the boundary member between main mould 105 and the sliding die 106 at the inside face of lens 101 as Fig. 7 and shown in Figure 8.Slide mark trace 107 is appreciiables during from lens forward observation lens 101, and this has just caused the obvious problem that influences lens 101 outward appearances.

Summary of the invention

The present invention is intended to solve foregoing problems, an object of the present invention is to make this trace line not to be formed at boundary member between main mould and the sliding die, be lens of car light bent angle part, trace line generally is to be caused by the sliding die that must be used to form the encapsulation pin in the prior art.

For the problem of being mentioned above solving, a kind of molded method that is used for lens of car light is provided here, bent angle in these lens part is from roughly extending towards the front portion in lens the place ahead and bending towards the one side, wherein lens have an encapsulation pin that obviously stretches out backward from the peripheral part of lens, lens partly have the part of inside extension and constitute the recess relevant with number of unmolulding directions thus at bent angle, this method has comprised the first road molding process that forms the lens various piece except that at least one and the cooresponding encapsulation of bent angle part foot section, and in order to being formed on the second road molding process of inchoate encapsulation foot section in the first road molding process.

The present invention also provides an equipment that is used for moulding lens of car light, bent angle part in these lens bends towards the one side from roughly extending towards the front portion in lens the place ahead, wherein lens have an encapsulation pin that obviously stretches out backward from the peripheral part of lens, lens also have a recess relevant with number of unmolulding directions that constitutes thus at bent angle part and the partial sum that extends internally, this equipment has comprised first mould that is used to form other various piece of lens except at least one and the cooresponding encapsulation of bent angle part foot section, and in order to form second mould of the inchoate encapsulation of first mould foot section.

Like this, be used for the described method and the mould of moulding lens of car light according to the present invention, the encapsulation pin can form on the lens, and the boundary member between shared mould and sliding die can not form the slide mark trace.

Description of drawings

Fig. 1 is that expression is by the concrete front view of making the lens of car light that forms of using of this invention.

Fig. 2 is the back view of the lens of the car light that forms of the concrete application manufacturing of expression by this invention.

Fig. 3 is the amplification horizontal sectional drawing of the lens of the car light that forms of the concrete application manufacturing of expression by this invention.

Fig. 4 is the horizontal sectional drawing of first mould in the expression first road molding process, and it has schematically illustrated molding process of the present invention and mould.

Fig. 5 is the horizontal sectional drawing of second mould in the expression second road molding process, and it has schematically illustrated molding process of the present invention and mould.

Fig. 6 is the horizontal sectional drawing of expression and structure shown in Figure 5 part inequality.

Fig. 7 is the front view of the lens of the traditional car light of expression.

Fig. 8 is the scheme drawing of molding process of the lens of the traditional car light of expression.

The specific embodiment

With reference to given accompanying drawing, the inventive method that is used for moulding lens of car light and the preferred embodiment of equipment are described below.

Among the described below embodiment, the lens 1 that are used for car light are by the resin of two kinds of different colours made (hereinafter, being called double color mold-making).

The lens 1 (hereinafter being called " lens ") that are used for car light, shown in Fig. 1 to 3, be by a kind of as acrylic resin, the thermoplastic base resin that polycarbonate resin and so on is transparent forms.

Lens 1 are grouped into by the resin portion of two kinds of different colours, and such as complete transparent colourless part CL and the transparent red part R of ruddiness, this double-colored resin partly is combined with one another to one.Lens 1 have a lens component 2, and it is a light transmissive part that light source is sent.Lens component 2 also comprises the part or a front portion 3 of face forward basically, the arrow F indication in as Fig. 1 and 2 of this part; One divides 3 to extend the bent angle part 4 bend towards lens component 2 one sides from front part; The encapsulation pin 5 that also has a mode of stretching out backward with peripheral part and lens component 2 to be combined as a whole from lens component 2.In other words, note bent angle part 4 be one for lens component 2 on a part (anterior 3) continuously and the part of bending forming, this part is vertical with the car light optical main axis on the lens.

Next step has the molding process of the lens 1 of structure as described above with description.

In lens 1 molding process of be about to describing, shown in Fig. 4 and 6, a shared mould 6 and respectively with a preforming mould 7 and a filling injection mould 8 of shared die combination, together with the mould of deciding.

Notice that because lens 1 have bent angle part 4 just there be the recess relevant with the number of unmolulding directions of lens 1 inevitably in that in the encapsulation pin 5 at bent angle part 4 places.Be overmolded on the ortho position that becomes recess as previously mentioned in order to encapsulate pin 5, except shared mould 6 and filling injection mould 8, also adopted a sliding die, this sliding die is installed on the filling injection mould 8 movably.

Consult accompanying drawing 4, shown the first road molding process among the figure, except that at least one and bent angle part 4 cooresponding encapsulation pin 5, the various piece of lens 1 all uses shared mould 6 and preforming mould 7 to be shaped.Consult Fig. 6, there is shown the second road molding process, corresponding and be not sector of breakdown by the encapsulation foot section of the first road molding process formed thereby with bent angle part 4 in this operation, these parts are by shared mould 6, and filling injection mould 8 and sliding die 9 are shaped.

Attention is in the first road molding process, and the front side 1a of lens 1 is shaped by shared mould 6, and the rear side 1b of lens 1 is shaped by preforming mould 7.Equally, notice in the second road molding process that the front side 1a of lens 1 is shaped by shared mould 6, and the rear side 1b of lens 1 is shaped by filling injection mould 8.

Accompanying drawing 4 is illustrated in mould in the first road molding process and is combined in together state, and therefore first mould 10 is for forming the remainder of the lens component 2 except colourless part CL.That is, in this first mould 10, between shared mould 6 and preforming mould 7, form a hole 11 so that the red part R of injection moulding lens 1.

Attention is in preferred embodiment of the present invention, when hole 11 form only be except that colourless part CL all the other lens components 2 (promptly, during red part 2) profile, this hole, in brief, can be to form the Any shape that lens 1 remove all the other each several parts of encapsulation pin 5 parts (that is, be at least with bent angle part 4 corresponding encapsulation pin 5 that part of).

Therefore, one of them purpose that molding process was divided into two steps is molded and bent angle part 4 cooresponding encapsulation pin 5, this bent angle part 4 has formed the recess of lens 1 with sliding die 9 in the second road molding process, so the other parts of lens can the road molding process be molded forms first except that the encapsulation pin 5 that is arranged in bent angle part 4.

Then, with the red part R of red resin injected hole 11 with formation lens component 2.The first road molding process be intended to form except with the bent angle part 4 cooresponding encapsulation pin 5 that constitute recess part, and with regard to cost, because this operation and without any need for special device and treatment, thereby this is one to optimize technology.

After the red resin of injected hole 11 cools off and solidifies, open first mould 10, only remove preforming mould 7.When this happens, shared mould 6 is remained stationary, and half-blank (the molded product that forms) is still stayed in the shared mould 6.

Next step as shown in Figure 5 and Figure 6, makes and wherein leaves semi-finished shared mould 6 and cooperate with filling injection mould 8, sliding die 9 and be fixed on the preposition of injection mould 8, and each mould all is sandwiched in together.Shared mould 6, filling injection mould 8 and sliding die 9 are formed second module 12, and are formed for injecting the hole of resin in second module.Notice that hole 13 is intended to form that part with bent angle part 4 corresponding encapsulation pin 5 of failing to form in first procedure.That is, in an embodiment of the present invention, because hole 13 comprises half-blank, hole 13 has the part 13b that a part 13a and corresponding to the colourless part CL of lens component 2 is used for forming whole encapsulation pin 15.

Next step in transparent resin injected hole 13a and whole hole 13, thereby is made the colourless part CL of lens component 2 and encapsulates pin 5.Then, after the resin cooling of injecting and solidifying, sliding die 9 will move along the direction shown in Fig. 6 arrow so that die sinking and remove molded product or lens 1.

In traditional lens of car light, be molded into the formation recess for encapsulating pin, except shared mould also needs sliding die; when hardening of resin; the lens inboard forms a trace line along the boundary member between shared mould and the sliding die, and this has seriously destroyed the outward appearance of lens, during especially from top view.Yet by the present invention, aforesaid slide mark trace will be less than the possibility that forms.

Promptly, in having used the second road molding process of sliding die 9, because to be close proximity to lens component 2 parts (concrete for just mold formed sliding die 9 in the first road molding process, be the boundary member between filling injection mould 8 and the sliding die 9), even encapsulation pin 5 forms on that part that constitutes recess, do not form the possibility of slide mark trace yet.

In the embodiment previously described, though the double-colored structure that lens are made up of the resin of two kinds of different colours, the present invention also is applicable to the lens of being made up of monochromatic resin.

Notice that the given shape of described various piece in the present embodiment and structure only represent the technical scope invented in the mode of example, and technical scope of the present invention is not limited only to this.

The invention provides a kind of method that is used for moulding lens of car light as mentioned above, these lens have a bent angle part, and this part is from roughly extending and bend towards a side of lens towards the front portion in lens the place ahead.These lens have a sealing lip that obviously stretches out backward from the boundary member of lens, partly there is a part that extends internally on the sealing limit and constitutes the recess relevant with number of unmolulding directions at bent angle, this method comprises the first road molding process, promptly be used for forming except with cooresponding at least one the encapsulation foot section of bent angle part all the other various pieces of lens, the second road molding process, promptly be used for being formed in the molded preface of the first road worker the encapsulation foot section of failing to form.Like this,, just can prevent that the boundary member between shared mould and sliding die from producing the slide mark trace, can improve the outward appearance of lens of car light thus even adopt sliding die to form the encapsulation pin.

In addition, according to a second aspect of the invention, a kind of aforesaid method is provided, wherein in the first road molding process, the shared mould and one that employing is used for forming the lens front side is used for forming the preforming mould of lens rear side, is used for forming the shared mould of lens front side and is used for forming the filling injection mould of lens rear side in the second road molding process.Like this, can prevent better that the boundary member between shared mould and sliding die from forming so-called slide mark trace.

Moreover, the invention provides a kind of equipment that is used for moulding lens of car light, these lens have a bent angle part, and this part is from roughly extending towards the front portion in lens the place ahead and bending towards the one side.Lens have the encapsulation limit of obviously stretching out backward from the peripheral part of lens, lens in bent angle part to having in one to extendible portion, and constitute the recess relevant thus with the direction of molding, this equipment comprises that one is used for forming first mould of other various pieces except that at least one and the cooresponding encapsulation of bent angle part foot section, lens, and second mould that is used for being formed on encapsulation pin and so on part of unshaped part in the first road molding process.Like this, can prevent that the boundary member between shared mould and sliding die from producing so-called slide mark trace, thereby improve the outward appearance of lens of car light.

According to the 4th aspect of the present invention, the equipment of aforesaid a kind of moulding lens of car light is provided, wherein first mould comprises the preforming mould that is used for forming the shared mould of lens front side and is used for forming the lens rear side, and second mould comprises shared mould that is used to form the lens front side and the filling injection mould that is used to form described lens rear side.Therefore can prevent better that the boundary member between shared mould and sliding die from producing described slide mark trace.Described slide mark trace can not be formed at the boundary member between shared mould and the sliding die, thereby improves the outward appearance of the lens of car light.

Claims

1. method that is used for moulding lens of car light, described lens have a bent angle part, described bent angle part is from extending and bend towards a side of described lens towards the front portion in lens the place ahead, wherein said lens have an encapsulation foot section of obviously stretching out backward to the peripheral part from described lens, described lens along bent angle partly have one extend internally the part and constitute a recess relevant thus with number of unmolulding directions, said method comprising the steps of:

The first road molding process is used for forming on the described lens other each several part except that at least one and the cooresponding encapsulation of bent angle part foot section; And

The second road molding process is used for being formed on unfashioned encapsulation foot section in the first road molding process.

2. be used for the method for moulding lens of car light according to claim 1, it is characterized in that, the described first road molding process comprises:

Adopt shared mould to form the front side of described lens, and adopt preforming mould to form the rear side of described lens.

3. as being used for the method for moulding lens of car light as described in the claim 2, it is characterized in that the described second road molding process comprises:

Adopt described shared mould further to form the front side of described lens; And

Adopt the filling injection mould further to form the rear side of described lens.

4. molded equipment that is used for lens of car light, described lens have a bent angle part, described bent angle part is from extending and bend towards a side of described lens towards the front portion in lens the place ahead, wherein lens have the encapsulation foot section that the peripheral part from described lens obviously stretches out backward, described lens partly have the part that extends internally at bent angle, and constitute the recess relevant thus with number of unmolulding directions, described equipment comprises:

First mould is used for forming on the described lens other each several part of lens except that at least one and the cooresponding encapsulation of bent angle part foot section; And

Second mould is used for being formed on institute unfashioned encapsulation foot section in the first road molding process.

5. as being used for the equipment of the lens of molded car light as described in the claim 4, it is characterized in that first mould comprises:

One is used for forming the shared mould of described lens front side; And

One is used for forming the preforming mould of described lens rear side.

6. as being used for the equipment of moulding lens of car light as described in the claim 5, it is characterized in that described second mould comprises:

Described shared mould can further form the described front side of described lens; And

One can further form the filling injection mould of described lens rear side.