CN210820462U

CN210820462U - Cylindrical roller die for manufacturing Fresnel lens

Info

Publication number: CN210820462U
Application number: CN201921182990.XU
Authority: CN
Inventors: 余兴果
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-06-23
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a make fresnel lens's cylinder roller mould, including columniform roller, be equipped with the bed die structure on the outer circumference of roller, the bed die structure is the circle form bed die that the several sets up with the axle center, and the radius of several bed die increases in proper order, and the cross-section of bed die is triangle-shaped. The utility model processes a plurality of full circle or semicircle female dies on the roller by the numerical control machine tool or chemical corrosion and other methods, and extrudes the coiled material polyester film through the female dies by the matching of the roller and the rolling die, thereby forming the Fresnel lens; simple structure, production shaping are efficient and can be serialization, the production fresnel lens of batch.

Description

Cylindrical roller die for manufacturing Fresnel lens

Technical Field

The utility model relates to an optical lens mold processing technical field, especially a cylinder roller mould of preparation fresnel lens.

Background

Fresnel lens, also known as screw lens, is mostly a sheet made of polyolefin material by injection molding, and is also made of glass, one surface of the lens is a smooth surface, and the other surface is inscribed with concentric circles from small to large. The Fresnel lens has optical focusing and optical imaging performances which are not inferior to those of the traditional lens, and has the advantages of light weight, thin thickness, large caliber, compact structure and the like, so that the Fresnel lens is widely applied to the fields of solar water heaters, solar power stations and imaging.

The current methods for producing fresnel lenses mainly include three methods:

(1) hot press forming

The hot press molding process generally adopts a flat pressing process (namely, a resin plate which is softened by heating is placed on a Fresnel lens mould, a certain pressure is uniformly applied to the plane of the resin plate, and the resin plate is cooled and shaped); or a roll-flattening process (rolling a heat-softened resin sheet placed on a fresnel lens mold with a roll to shape it, and then cooling and shaping it). The method has the defects that the temperature distribution is not uniform in the cooling process of hot press molding, the phenomenon of thermal shrinkage is easy to occur, the temperature rise and fall period is longer, the method is only suitable for the production of a single Fresnel lens, and the production efficiency is low.

(2) Casting molding

The casting molding process generally pours liquid resin with certain fluidity into a closed Fresnel lens molding die for resin curing, and has the defects of long pouring time, long curing time, easy bubble generation, suitability for single Fresnel lens production and low production efficiency.

(3) Plane light curing molding

The plane light curing molding process generally uses light curing resin as a production raw material of a Fresnel lens, a layer of liquid light curing resin with uniform thickness is arranged on a Fresnel lens mould, a transparent organic glass plate is arranged on the liquid light curing resin, an ultraviolet light source passes through the ultraviolet light source at a constant speed, ultraviolet rays penetrate through the transparent organic glass and irradiate the light curing resin to cure the light curing resin, and after the curing is finished, demoulding treatment is carried out. Although the production time of the planar light curing molding process is short, the process is only suitable for producing single Fresnel lenses and cannot realize automatic continuous batch production.

The above-mentioned several kinds of production forming methods are inefficient, can not realize the production of serialization, batch to there is the not good condition of product drawing of patterns, seriously influenced the quality of product.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that just to the not enough of above-mentioned prior art, provide a simple structure, production shaping efficiency height and can serialization, the cylinder roller mould of the preparation fresnel lens of the production of batch.

In order to realize the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a make fresnel lens's cylinder roller mould, includes the columniform roller, is equipped with the bed die structure on the outer circumference of roller, the bed die structure is the circle form bed die that the several sets up with the axle center, and the radius of several bed die increases in proper order, and the cross-section of bed die is triangle-shaped.

Preferably, the female die is in a full circle shape, and the axis of the female die is located in the middle of the roller.

Preferably, the roller diameter is between 200mm and 500 mm.

Preferably, the female die is in a semicircular ring shape, and the axis of the female die is positioned at the end part of the roller.

Preferably, the roller diameter is between 500mm and 800 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

processing a plurality of full-circle or semicircular female dies on the roller by a numerical control machine tool or a chemical corrosion method and the like, and extruding the coiled material polyester film by utilizing the female dies through the matching of the roller and a rolling die to form the Fresnel lens; simple structure, production shaping are efficient and can be serialization, the production fresnel lens of batch.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

The labels in the figure are: 1-roller and 2-female die mechanism.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:

example one

As shown in fig. 1, the present embodiment provides a cylindrical roll mold for manufacturing a fresnel lens, which includes a roll 1 and a female mold mechanism 2. The roller 1 is processed by conventional equipment such as a numerical control engraving and milling machine, and the working surface of the roller is polished into a mirror surface after processing, so that higher precision is ensured when the Fresnel lens is manufactured.

The diameter of the roller 1 is 200mm-500mm, a female die structure 2 is arranged on the outer circumference of the roller 1, the female die structure 2 is a plurality of full-circle female dies which are coaxially arranged, the radiuses of the female dies are sequentially increased, the cross sections of the female dies are triangular, and the axes of the female dies are located in the middle of the roller 1.

Fresnel lens's raw materials can adopt coiled material polyester film, coiled material polyester film is through front end processing apparatus, the front end is handled the vanning and is equallyd divide into equally the size with coiled material polyester film, every coiled material polyester film loops through conveyor and carries to between roller 1 and the roll-in mould, cooperation through roller and roll-in mould makes the bed die extrude to the cubic glass board of board, form Fresnel lens, moreover, the steam generator is simple in structure, the production shaping is efficient and can serialization, the production Fresnel lens of wholesale.

Example two

The embodiment is basically the same as the first embodiment, wherein the diameter of the roller 1 is 500mm-800mm, the female die is in a semicircular ring shape, and the axis of the female die is positioned at the end part of the roller.

Processing a plurality of full-circle or semicircular female dies on the roller by a numerical control machine tool or a chemical corrosion method and the like, and extruding the coiled material polyester film by matching the roller with a rolling die so as to form the Fresnel lens; simple structure, production shaping are efficient and can be serialization, the production fresnel lens of batch.

Claims

1. The utility model provides a preparation fresnel lens's cylinder roller mould, includes columniform roller (1), is equipped with bed die structure (2), its characterized in that on the outer circumference of roller (1): the female die structure (2) is a plurality of circle-shaped female dies which are coaxially arranged, the radiuses of the female dies are sequentially increased, and the cross sections of the female dies are triangular.

2. The cylindrical roller mold for manufacturing fresnel lenses according to claim 1, wherein: the female die is in a full circle shape, and the axis of the female die is positioned in the middle of the roller (1).

3. The cylindrical roller mold for manufacturing fresnel lenses according to claim 2, wherein: the diameter of the roller (1) is 200mm-500 mm.

4. The cylindrical roller mold for manufacturing fresnel lenses according to claim 1, wherein: the female die is in a semicircular shape, and the axis of the female die is positioned at the end part of the roller (1).

5. The cylindrical roller mold for manufacturing Fresnel lenses according to the claim 4, wherein: the diameter of the roller (1) is 500-800 mm.