KR20120095613A - Fabrication method of reflector for lamp and reflector for lamp - Google Patents

Abstract

PURPOSE: A lighting reflector and a manufacturing method thereof are provided to maximize reflection efficiency by forming a plurality of perforations in a lighting reflector. CONSTITUTION: A lighting reflector(10) is in a truncated cone or horn shape with open top and bottom and includes a lamp vertically arranged inside. A cover is installed at the bottom of the lighting reflector to prevent the infiltration of dust and foreign materials. The lighting reflector is made of a crystalline plastic material including polyolefin resin. The angle between the side face(11) of the lighting reflector and a horizontal axis(H) is 95°-135°.

Description

Fabrication method of reflector for lamp and reflector for lamp

The present invention relates to a method for manufacturing a lighting reflector and a lighting reflector, and more particularly, to a lighting reflector and a method for manufacturing a lighting reflector having a seamless and easy to manufacture with at least a high reflectivity.

Luminaires, such as downlights, are a type of lighting device that drills small holes in the ceiling and embeds lamps therein. Such lighting fixtures are widely used as an architectural lighting technique that integrates lighting and buildings. In particular, since the down light type is a buried type, there is almost no exposure of the lighting fixture, and the ceiling surface is well-organized. In addition, the ceiling is dark, which makes it an ideal way to create an atmosphere of indoor space.

In general, such lighting equipment is installed on the ceiling or wall surface of the room to illuminate the room, but in recent years the interior of the room is installed in addition to the original purpose to illuminate the darkness as the concept of lighting is variously changed. It is considered as a field of interior for enhancing effect and aesthetics, and is being developed and constructed in a suitable form.

In particular, downlights, which are constructed for the purpose of interiors in addition to lighting, have a reflection lamp shaped like a fallopian tube so as to create a unique indoor atmosphere.

Looking at such an luminaire as an example of a conventional general configuration, as shown in Figure 1 of the accompanying drawings.

The ceiling-embedded light fixture 100 is provided with an upper and lower light fallopian trumpet-shaped reflector 150 which is narrow in the upper portion and gradually lowered in the upper and lower portions of the cylindrical case 110 in which the lower portion is opened. In addition, a socket (not shown) is fastened to an inner upper end of the case 110 by a separate bolt.

The lamp 180 is detachably coupled to the socket (not shown) so that the lamp 180 may be positioned inside the reflection shade 150. At this time, the reflection shade 150 is supported by the elastic piece 130 is fixed to the lower end of the case (110). In addition, a ring-shaped cover 140 is provided at the bottom of the case 110 to prevent foreign substances from flowing between the case 110 and the reflection shade 150. The elastic piece 130 is installed to elastically support the outer surface of the reflection shade 150.

In such lighting fixtures, the reflecting lamp for reflecting the light of the lamp inside is made of aluminum, painted on a steel plate, or cut into a shape by cutting a good reflecting sheet to form a shape. do.

Among them, the method of manufacturing the reflective shade by forming aluminum has a problem in that the light is concentrated only on a certain area mainly on total reflection, thereby reducing the overall reflection efficiency. In other words, since only total reflection is made, rather than diffuse reflection, the overall illumination becomes difficult. To solve this problem, a separate diffuse reflection cover 120 may be placed on the lower portion of the reflection shade. Such a diffuse reflection cover has the advantage of preventing the local concentration of light by causing diffuse reflection, but there is a problem that the overall light intensity is inevitably weakened.

In addition, in the case of the method of painting the iron plate in white color, the reflection characteristic depends on the performance of the coating, and thus the efficiency is determined, but the reflectance is difficult to exceed 90% or more.

In addition, an auxiliary object capable of maintaining a shape after cutting a reflective sheet having a high reflective characteristic into a desired shape may be attached to the reflective shade, but in this case, a cut line may be visible, which is undesirable. It's not free, so it's bad for psychology.

In particular, the conventional reflective sheet manufacturing method uses uniaxial stretching or biaxial stretching, but in the case of uniaxial stretching, it is necessary to make voids such as pores or bubbles for reflection therein, but the amount of voids produced is small. .

In addition, in the case of biaxial stretching, since the reflective sheet that has already been uniaxially stretched is additionally stretched in the biaxial direction, the amount of voids can be increased, thereby obtaining a high reflection characteristic. In the case of the high cost of several billion won because the manufacturing cost is high, and the thickness of the sheet produced is only 0.3mm or less has a disadvantage that can not produce a variety of reflection shades.

The present invention was created in order to solve the above-mentioned problems, and more particularly, because the reflectance is high and there is no seam, the aesthetics are beautiful and the biaxial stretching is made in a press method, thereby manufacturing a reflective reflector for easy manufacturing cost and manufacturing method. It is an object to provide a method and a reflecting shade for lighting.

Method for producing a reflecting lamp for illumination of the present invention for achieving the above object, the sheet preparation step of preparing an extruded sheet having a predetermined thickness;

A fixing step of fixing an edge of the sheet by a clamp having an inner space;

A heating step of heating the sheet in a low temperature state; And

And stretching the sheet by pressing the sheet by using a punch having a lower surface of an area smaller than the inner space of the clamp.

In the above production method,

The punch may have a wedge shape in which the diameter gradually increases toward the upper side.

In the above production method,

The sheet,

The fixing part fixed by the clamp, the contact part in contact with the lower surface of the punch, and the drawing part drawn by the punch as parts other than the fixing part and the contact part.

In the above production method,

When the length before stretching of the stretching portion is G and the length after stretching of the stretching portion is G ',

It is preferred that 4G ≦ G ′ ≦ 6G.

In the above production method,

In the heating step, the low temperature is preferably 100 ° C or less.

Illuminating reflector of the present invention for achieving the above object is an illumination reflector for reflecting the light of the lamp disposed in the vertical direction therein,

It has an inclined side that opens at the top and bottom and slopes outwards toward the bottom,

It is made integrally without seams and made of crystalline plastic material,

Including a plurality of pores having an average particle diameter of 0.1 ~ 10㎛ and porosity is 5 ~ 60%,

An angle between the horizontal axis perpendicular to the vertical direction and the side surface may be 95 ° to 135 °.

In the lighting reflector,

The crystalline plastic may include a polyolefin resin.

In the lighting reflector,

Reflective additives may be included therein.

In the lighting reflector,

The reflection additive is a white powder, and may be made of any one of calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ), or titanium dioxide (TiO ₂ ).

In the lighting reflector, a flame retardant may be included therein.

In the lighting reflector,

The flame retardant may include any one of bromine-based, phosphorus-based flame retardant or antimony oxide (Sb ₂ O ₃ ).

According to the manufacturing method of the reflecting lamp for lighting of the present invention, since the press method is used to implement the multi-axis stretching, there is an advantage that the manufacturing is simple and the manufacturing cost can be reduced.

In addition, according to the manufacturing method of the reflecting lamp for lighting of the present invention, a plurality of pores can be formed therein has the advantage that the reflection efficiency can be maximized.

In addition, according to the manufacturing method of the reflective reflector for lighting of the present invention, since the reflective shade is manufactured by using a press method, there is an advantage that the reflective shade can be manufactured in various shapes.

1 is a perspective view of a lighting device according to the prior art.
2 is a cross-sectional view of the reflecting shade for lighting according to a preferred embodiment of the present invention.
3 is a flow chart showing the manufacturing method of FIG.
4 and 5 schematically show the manufacturing method of FIG.
6 is a view showing a relationship according to the reflectance and the porosity of the reflection shade.
7 is a view showing a relationship according to the angle and the stretching temperature of the reflection shade.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Illuminating reflector 10 according to an embodiment of the present invention, the lamp is disposed in a vertical direction therein as a whole has the shape of a truncated cone or fallopian tube, the top, the bottom of the opening. The lighting reflector 10 is formed to be inclined outwards toward the lower side. A power supply means (not shown) for supplying power to a lamp or the like may be installed above the reflection shade.

The lower opening may emit light to the outside, and a cover (not shown) may be installed at the lower side of the reflecting shade to prevent dust from being introduced from the outside when the reflecting shade is installed.

Such lighting reflector is made of a single piece without a seam, but made of a crystalline plastic material. In this case, the crystalline plastic may include a polyolefin-based resin, but is not limited thereto. As long as the crystalline plastic is excellent in formability and excellent in strength, it is of course possible.

The reflection shade preferably has an angle θ (or an outer angle) between the horizontal axis H perpendicular to the vertical direction and the side surface 11 of 95 ° to 135 °.

Inside the side surface of the reflection shade includes a plurality of pores (11a) having an average particle diameter of 0.1 ~ 10㎛ and porosity may be 5 ~ 60%. The reason for limiting the size of the pores 11a is that when the average particle diameter of the pores is smaller than 0.1 μm, fine pores increase, so that the light incident on the surface of the reflector generates too many irregular diffuse reflections inside the reflector. Not desirable in terms of In addition, when the average particle diameter is larger than 10 mu m, it is not preferable that the light incident on the reflecting shade does not sufficiently cause scattering / reflection.

In addition, when the porosity is 5% or less, the reflectance is low due to the small number of pores, and when the porosity is 60% or more, the amount of pores is too large or the size of the pores is large, so that the scattering / reflective effect of the light is reduced, thereby reducing the overall reflectance. I can't.

On the other hand, the reflective reflector of the present invention can be used only pores (or bubbles) for reflection, in addition to the reflection additive, flame retardant, antistatic material may be included with the pores.

The reflective additive (not shown) may be made of at least one of calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ), or titanium dioxide (TiO ₂ ) as a white powder. Such a reflection additive serves to further increase the reflectance of the reflector.

At this time, the weight part of the reflection additive is preferably 5 to 40%. If the weight part of the reflection additive is less than 5%, the reflection efficiency is not preferable, and if it is 40% or more, the overall formability is not preferable, which is not preferable.

In addition, the reflection additive is preferably the reflection additive has a particle diameter of 0.2 ~ 10㎛ for maximizing the reflection performance.

The flame retardant (not shown) may include at least one of bromine-based or phosphorus-based flame retardant and antimony oxide (Sb ₂ O ₃ ).

In the composition of the flame retardant, a flame retardant such as bromine-based serves to increase the overall flame retardant performance of the reflection shade.

The weight part of such flame retardant is preferably 10 to 30%. If the weight part of the flame retardant is less than 10%, the flame retardant properties are not preferable, and if the weight part of the flame retardant material is greater than 30%, the reflective properties are deteriorated, which is not preferable.

The antistatic material (not shown) is to prevent the phenomenon that the dust sticks to the inner surface side of the reflection shade. Such antistatic materials include, for example, polyaniline, polypyrrole, polythiophene, polyphenylene vinylene, polyparaphenylene, poly (p- phenylene)} or at least one of polyphenylene sulfide (PPS).

Meanwhile, in addition to the antistatic material, an antistatic layer may be coated on the inner surface of the reflection shade. Such an antistatic material may include a real shot-acrylic copolymer, a conductive polymer aqueous dispersion, a mixed solvent and an additive. In this case, the actual shot-acrylic copolymer may improve dispersibility of the conductive polymer and improve film uniformity, adhesion, and film strength of the resulting coating film. However, in addition to the actual shot-acrylic copolymer, if it is possible to improve the characteristics of the coating of the conductive polymer, other things may be used.

The reflection shade according to one embodiment of the present invention may be manufactured as follows. The method of manufacturing the reflection shade according to the present embodiment includes a sheet preparation step (S100), a fixing step (S200), a heating step (S300), and a press stretching step (S400).

The sheet preparation step (S100) is to prepare the sheet 11 'extruded to a thickness of 2mm. As described above, the sheet 11 'is preferably made of a polyolefin resin.

In the fixing step (S200), the edges of the sheet 11 'are fixed by clamps 30' and 30 '' having an inner space 30a. Specifically, the sheet 11 is provided by pressing the pair of clamps 30 'and 30' 'close to each other with the sheet 11' between the upper and lower pairs of clamps 30 'and 30' '. ') Is fixed with the clamps 30', 30 ''. At this time, the inner space 30a of the clamps 30 'and 30' 'has a larger cross-sectional area than the punch 20 inserted therebetween. At this time, the seat 11 'includes a fixing portion b fixed by the clamps 30' and 30 ", a contact portion a which can contact the lower surface 20a of the punch 20, and the high It consists of the extending | stretching part S located between the said fixed part b and the said contact part a as a part other than the top part b and the contact part a.

In the heating step S300, the sheet 11 ′ is heated at a low temperature of about 100 ° C. or less, specifically about 60 ° C., so that the sheet 11 ′ is placed in a stretchable state.

The press stretching step S400 has a lower surface 20a having a smaller area than the inner space 30a of the clamps 30 'and 30' 'and has a wedge-shaped punch 20 gradually increasing in diameter toward the upper side. The sheet 11 'is pressed to stretch the sheet 11'.

Specifically, the punch 20 is pressed while descending while contacting the contact portion a. Specifically, the stretching portion S of the sheet 11 'is stretched in the plane direction by the punch 20. At this time, when the length before extending | stretching a extending | stretching part is called G, and the length after extending | stretching a extending | stretching part is called G ', the said punch is lowered so that G' = 5G. However, the stretching length of the stretching portion is not limited thereto and may be 4G ≦ G ′ ≦ 6G. On the other hand, the lowering speed of the press is preferably 1cm / second.

Meanwhile, after the press stretching step, a cutting step (not shown) may be added to cut and remove the fixing part and the stretching part from the sheet.

When stretched as described above, the stretched portion may be evenly stretched as a whole, wherein the angle θ may be about 102 ° and the porosity may be about 22%. The pores formed may have an approximately oval shape, in which the narrow side may be 0.2 μm and the long side may be 1.0 μm.

The lighting reflector stretched by this method has the following effects.

First, FIG. 6 is a graph showing the correlation between the porosity and the reflectance, and FIG. 7 is a graph showing the correlation between the angle θ and the stretching temperature. As shown in FIG. 6, the porosity is 5 to 60%. Within the overall reflectance can be maintained more than 85%, and within 10 to 50% the reflectance can reach 90%, the overall high reflectance can obtain a highly efficient reflector. Specifically, it can be seen that the reflectance is 87% at 5% porosity and 99% at 20% porosity. However, when the porosity exceeds 60%, it can be seen that the reflectance is kept low at 83%.

In the graph of FIG. 6, zero porosity indicates low reflectivity because bubbles or pores that scatter light are not present inside the stretched sheet, and a porosity greater than zero means that a certain number of bubbles or pores are generated. It also means that its size grows little by little and scatters a lot of light. However, when the porosity is 60%, the pore size is so large that the scattering / reflection of light is reduced.

In addition, as shown in FIG. 7, the relationship between the stretching temperature and the angle is examined. As a result, when the stretching temperature is low, the stretching length is not large, and the angle is large. However, when the stretching temperature is high, the stretching ratio becomes larger. The length becomes longer and this leads to an abrupt graph close to 90 °, which is undesirable. The reason for this is that when the angle closes to 90 °, the reflecting shade for lighting is almost cylindrical, so that the reflector does not function properly. Specifically, it is not preferable to not send the light toward the user and the light reciprocates only in the reflection shade or intensively illuminates only the position directly below the reflection shade.

In addition, 135 degrees or more cannot manufacture by extending | stretching. On the other hand, in the present invention as the stretching temperature is carried out at 100 ℃ or less so that the overall angle between 95 ° or more so that the light can be easily emitted to the outside as a whole.

According to one embodiment of the present invention, there is an advantage that the manufacturing method is simple and the manufacturing cost can be reduced because the press method is used to implement the multi-axis stretching.

In addition, according to the manufacturing method of the reflecting lamp for lighting of the present invention, a plurality of pores can be formed therein has the advantage that the reflection efficiency can be maximized.

In addition, according to the manufacturing method of the reflective reflector for lighting of the present invention, since the reflective shade is manufactured by using a press method, there is an advantage that the reflective shade can be manufactured in various shapes.

In addition, it is possible to manufacture a reflector with a high reflectance compared to the iron plate formed with aluminum or other coating layer has the advantage that can be maximized the lighting efficiency.

10 ... light reflector 11 ... side
11a ... pore 20 ... punch
30 ', 30''... punch

Claims (11)

As a method of manufacturing a reflecting shade for lighting,
A sheet preparation step of preparing an extruded sheet having a predetermined thickness;
A fixing step of fixing an edge of the sheet by a clamp having an inner space;
A heating step of heating the sheet in a low temperature state; And
And a press stretching step of stretching the sheet by pressing the sheet by using a punch having a lower surface of an area smaller than the inner space of the clamp. The method of claim 1,
The punch has a wedge shape in which the diameter gradually increases from the lower surface to the upper side manufacturing method of the reflecting shade for illumination. The method of claim 1,
The sheet,
A fixing portion fixed by the clamp, a contact portion in contact with the lower surface of the punch, and a stretching portion stretched by the punch as parts other than the fixing portion and the contact portion. The method of claim 3,
When the length before stretching of the stretching portion is G and the length after stretching of the stretching portion is G ',
4G ≤ G '≤ 6G method of manufacturing a reflector for the illumination, characterized in that. The method of claim 1,
In the heating step, the low temperature is a manufacturing method of the reflecting lamp for illumination, characterized in that less than 100 ℃. Claims 1 to 5 as a manufacturing method of any one of the illumination reflector for reflecting the light of the lamp disposed in the vertical direction therein,
It has an inclined side that opens at the top and bottom and slopes outwards toward the bottom,
It is made integrally without seams and made of crystalline plastic material,
Including a plurality of pores having an average particle diameter of 0.1 ~ 10㎛ and porosity is 5 ~ 60%,
Reflecting shade for illumination, characterized in that the angle between the horizontal axis perpendicular to the vertical direction and the side surface is 95 ° ~ 135 °. The method of claim 6,
The crystalline plastic comprises a polyolefin resin, reflecting shade for illumination. The method of claim 6,
Reflector for illumination, characterized in that the reflection additive is included therein. 9. The method of claim 8,
The reflective additive is a white powder, a frameless ceiling buried reflection shade comprising any one of calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ) or titanium dioxide (TiO ₂ ). The method of claim 6,
Reflective lamp for lighting, characterized in that the flame retardant is included inside. The method of claim 10,
The flame retardant is a reflection reflector for illumination comprising a bromine-based, phosphorus-based flame retardant or antimony oxide (Sb ₂ O ₃ ).

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