CN214687756U

CN214687756U - Injection mold of diffusion lens

Info

Publication number: CN214687756U
Application number: CN202120189498.6U
Authority: CN
Inventors: 南基学
Original assignee: Yejia Optical Technology Guangdong Corp
Current assignee: Yejia Optical Technology Guangdong Corp
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-12
Anticipated expiration: 2031-01-22

Abstract

The utility model provides an injection mold of a diffusion lens, which comprises an upper padding plate, an upper template, a lower die holder and a lower padding plate, wherein an injection molding main runner is arranged in the upper template, the lower template is provided with an injection molding sub-runner, the bottom of the upper template is provided with n lens body concave die cavities, the top of the lower template is provided with n lens holder concave die cavities, and each lens holder concave die cavity is respectively connected with each end of the injection molding sub-runner; be equipped with the convex mould piece in the mirror base die cavity, be connected with at the bottom of the chamber of mirror base die cavity and be the annular lift hole of circle, sliding connection has the annular liftout cover of circle in the lift hole, and the top surface of liftout cover is the coarse structure face, is equipped with the lift chamber of stepping down in the die holder, goes up and down to step down to be equipped with elevating system in the chamber, and elevating system connects the liftout cover. The utility model discloses can form the diffuse reflection structural plane that possesses the diffuse reflection performance to diffusion lens's bottom surface, need not to carry out extra machining, can effectively improve machining efficiency, in addition, can effectively avoid diffusion lens's body surface to form the defect.

Description

Injection mold of diffusion lens

Technical Field

The utility model relates to an injection mold specifically discloses an injection mold of diffusion lens.

Background

The mold is a tool for realizing molded articles in industrial production, the injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate sizes, and specifically, the heated and melted plastic is injected into a mold cavity at high pressure by an injection molding machine, and a molded plastic part is obtained after cooling and solidification.

The diffusion lens is also called as a TV lens and a backlight lens, and is generally used in the fields of flat lamps, television backlight modules and the like, the light-emitting surface of the diffusion lens is generally of a convex aspheric structure, and the other surface of the diffusion lens is generally a plane and is provided with a concave light-placing cavity. In the prior art, the diffusion lens is manufactured by injection molding through an injection mold, and for the diffusion lens which needs to improve the dodging effect and the light energy utilization rate, a diffuse reflection structural surface is obtained on the plane of the diffusion lens through machining, so that the machining operation is complex, and the machining cost is high.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need to provide an injection mold for a diffusion lens, which can obtain a diffusion lens having a diffuse reflection structure surface by injection molding and can effectively save the processing steps.

In order to solve the prior art problem, the utility model discloses an injection mold of diffusion lens, include from last to the upper padding plate, cope match-plate pattern, lower bolster and the lower bolster that set gradually down, be equipped with the injection molding sprue in the cope match-plate pattern, the top of lower bolster is equipped with the subchannel of moulding plastics that is located directly under the sprue, the bottom of cope match-plate pattern is equipped with n mirror body die cavity, n is the integer that is greater than 1, the top of lower bolster is equipped with n mirror seat die cavity that are located respectively directly under each mirror body die cavity, each mirror seat die cavity is connected respectively in each end of the subchannel of moulding plastics;

be equipped with the convex mould piece in the mirror base die cavity, be connected with at the bottom of the chamber of mirror base die cavity and be the annular lift hole of circle, the lift hole around with convex mould piece's below all around, sliding connection has the annular liftout cover of circle in the lift hole, the top surface of liftout cover is the coarse structure face, is equipped with the lift chamber of stepping down in the die holder, goes up and down to step down to be equipped with elevating system in the chamber, elevating system connects the liftout cover.

Furthermore, a heating cavity is arranged in the convex module, and a heating structure is arranged in the heating cavity.

Furthermore, the jacking sleeve comprises two first jacking columns and two second jacking columns, rough structure surfaces are arranged on the top surfaces of the first jacking columns and the top surfaces of the second jacking columns, the lifting mechanism comprises a first lifting plate and a second lifting plate, the first lifting plate is positioned above the second lifting plate, the first jacking columns are fixed on the first lifting plate, and the second jacking columns are fixed on the second lifting plate; the lower base plate is provided with a first yielding hole and a second yielding hole, and the second lifting plate is provided with a third yielding hole.

Furthermore, the bottom of first lifter plate is fixed with first guide block, and first guide block sliding connection is in first hole of stepping down and the third hole of stepping down.

Furthermore, a second guide block is fixed at the bottom of the second lifting plate and is connected in the second yielding hole in a sliding mode.

Furthermore, a first spring is connected between the first lifting plate and the lower template.

Furthermore, a second spring is connected between the second lifting plate and the lower template.

The utility model has the advantages that: the utility model discloses an injection mold of diffusion lens, the liftout cover that the setting has the coarse structure face is in mirror seat die cavity, when injection moulding, can form the diffuse reflection structural plane that possesses the diffuse reflection performance to diffusion lens's bottom surface, need not to carry out extra machining, can effectively improve machining efficiency, reduce the processing cost, in addition, the liftout cover that the subchannel of moulding plastics and be used for taking off the material all meets with mirror seat die cavity, can effectively avoid diffusion lens's body surface to form the defect, thereby effectively ensure diffusion lens's performance.

Drawings

Fig. 1 is a schematic structural view of the mold closing and injection molding device of the present invention.

Fig. 2 is a schematic structural view of the die sinking and discharging of the utility model.

The reference signs are: the injection molding device comprises an upper base plate 10, an upper base plate 20, an injection molding main flow channel 21, a mirror body cavity 22, a lower base plate 30, an injection molding sub-flow channel 31, a mirror base cavity 32, a male mold block 33, a lifting hole 34, a heating cavity 35, a lower base 40, a lifting abdicating cavity 41, a lower base plate 50, a first abdicating hole 51, a second abdicating hole 52, a jacking sleeve 60, a rough structure surface 601, a first jacking column 61, a second jacking column 62, a lifting mechanism 70, a first lifting plate 71, a first guide block 711, a second lifting plate 72, a third abdicating hole 721, a second guide block 722, a first spring 73, a second spring 74 and a diffusion lens 80.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 and 2.

The embodiment of the utility model discloses an injection mold of diffusion lens, including from last upper padding plate 10, cope match-plate pattern 20, lower bolster 30, lower bolster 40 and lower padding plate 50 that set gradually down, be equipped with in the cope match-plate pattern 20 and mould plastics sprue 21, the top of lower bolster 30 is equipped with and is located the branch runner 31 of moulding plastics under sprue 21, the bottom of cope match-plate pattern 20 is equipped with n mirror body die cavity 22 that are used for diffusion lens 80 body shaping, preferably, the surface of mirror body die cavity 22 is the proud aspheric surface structure that makes progress, match with the play plain noodles of diffusion lens 80, n is the integer that is greater than 1, the top of lower bolster 30 is equipped with n and is located mirror seat die cavity 32 under each mirror body die cavity 22 respectively, mirror seat die cavity 32 is used for the mirror seat shaping of diffusion lens 80, each mirror seat die cavity 32 is connected respectively in each end of branch runner 31 of moulding plastics, when cutting after the injection moulding, since the water gap member is connected to the lens holder cavity 32, once the defect formed by cutting exists only on the surface of the lens holder, the optical performance of the diffusion lens 80 is not affected, preferably, n is 2, and the two lens holder cavities 32 are respectively connected to two ends of the injection runner 31;

the concave mirror base die cavity 32 is internally provided with a convex die block 33, the convex die block 33 is fixed at the center of the bottom of the concave mirror base die cavity 32, the bottom of the concave mirror base die cavity 32 is connected with a circular lifting hole 34, the lifting hole 34 surrounds the periphery of the lower part of the convex die block 33, a circular jacking sleeve 60 is slidably connected in each lifting hole 34, the top surface of each jacking sleeve 60 is a rough structure surface 601 and is used for forming a diffuse reflection structure with diffuse reflection performance on the bottom surface of the diffusion lens 80, the rough structure surface 601 can be a frosted surface, a sawtooth structure surface and the like, a lifting yielding cavity 41 is arranged in the lower die base 40, a lifting mechanism 70 is arranged in the lifting yielding cavity 41, and the lifting mechanism 70 is connected with the jacking sleeve 60.

The utility model is used for the injection moulding of diffusion lens 80 that possesses high light energy utilization, when the compound die is moulded plastics, as shown in figure 1, the upper die plate 20 is hugged closely on the surface of lower bolster 30, forms the injection molding die cavity between mirror body die cavity 22, mirror seat die cavity 32 and the convex mould piece 33, and the molten plastic enters into the injection molding die cavity from the injection molding sprue 21 through the injection molding subchannel 31; the diffusion lens 80 is obtained after the molten plastic in the injection molding cavity is cooled and molded, when the mold is opened and the material is removed, as shown in fig. 2, the upper mold plate 20 is separated from the lower mold plate 30, the material ejecting sleeve 60 is driven by an external power structure through the lifting mechanism 70 to ascend, the diffusion lens 80 is ejected away from the lens base concave mold cavity 32, and as the material ejecting sleeve 60 and the injection molding runner 31 are connected with the lens base concave mold cavity 32, the surface of the finally obtained diffusion lens 80 body cannot form defects, and the performance of the diffusion lens 80 is good. The rough structure surface 601 can enable the bottom surface of the diffusion lens 80 to form a diffuse reflection structure with diffuse reflection performance, and the diffusion lens 80 finally obtained by injection molding does not need to be additionally machined to obtain the diffuse reflection structure, so that the preparation efficiency can be effectively improved, and the processing cost can be reduced.

In this embodiment, a heating cavity 35 is disposed in the male mold block 33, a heating structure is disposed in the heating cavity 35, preferably, the heating structure is a heating wire, the male mold block 33 can be effectively heated by the heating structure, the heated male mold block 33 can heat and preserve the temperature of the molten plastic inside the lens holder cavity 32, so as to ensure the fluidity of the molten plastic in the lens holder cavity 32, and when the mold is closed and injection molded, the molten plastic can be effectively filled in each corner of the injection mold cavity, thereby avoiding the formation of defects such as air holes.

In this embodiment, the jacking sleeve 60 includes two first jacking columns 61 and two second jacking columns 62 spliced into a circular ring, preferably, the first jacking column 61 and the second jacking column 62 are both in a cylindrical shape with a semicircular section, the top surfaces of the first jacking column 61 and the second jacking column 62 are both provided with a rough structure surface 601, the lifting mechanism 70 includes a first lifting plate 71 and a second lifting plate 72, the first lifting plate 71 is located above the second lifting plate 72, when the mold is closed, a gap is formed between the first lifting plate 71 and the second lifting plate 72, so that the first lifting plate 71 and the second lifting plate 72 can realize step-by-step lifting without mutual influence, the first jacking column 61 is fixed on the first lifting plate 71, and the second jacking column 62 is fixed on the second lifting plate 72; the lower base plate 50 is provided with a first yielding hole 51 and a second yielding hole 52, the second lifting plate 72 is provided with a third yielding hole 721, the first lifting plate 71 and the second lifting plate 72 are respectively connected with a first driving mechanism and a second driving mechanism, the first yielding hole 51 and the third yielding hole 721 act on the first lifting plate 71 for the first driving mechanism to realize yielding, and the second yielding hole 52 acts on the second lifting plate 72 for the second driving mechanism to yield. After the injection molding die is opened, the first driving mechanism drives the first lifting plate 71 to ascend, the first ejection column 61 pushes the diffusion lens 80 to ascend, the diffusion lens 80 is separated from the second ejection column 62 with the unchanged position, then the second driving mechanism drives the second lifting plate 72 to ascend, the second ejection column 62 ascends for a certain distance and then contacts with the diffusion lens 80, and continuously ascends and pushes the diffusion lens 80 to ascend, the diffusion lens 80 is separated from the first ejection column 61 with the unchanged position, the material removing effect can be effectively ensured, the first ejection column 61 and the second ejection column 62 ascend step by step to realize material removing, the diffusion lens 80 can be effectively prevented from being adhered to the ejection sleeve 60 due to the existence of the rough structure surface 601, and finally the diffusion lens 80 cannot effectively realize material removing.

Based on the above embodiment, the first guide block 711 is fixed at the bottom of the first lifting plate 71, and the first guide block 711 is slidably connected to the first and

third relief holes

51 and 721, so that the reliability of the lifting action of the first lifting plate 71 can be effectively improved.

Based on the above embodiment, the second guide block 722 is fixed at the bottom of the second lifting plate 72, and the second guide block 722 is slidably connected in the second abdicating hole 52, so that the reliability of the lifting motion of the second lifting plate 72 can be effectively improved.

In this embodiment, a first spring 73 is connected between the first lifting plate 71 and the lower template 30, and the stability of the lifting motion of the first lifting plate 71 can be effectively improved through the first spring 73.

Based on the above embodiment, the second spring 74 is connected between the second lifting plate 72 and the lower template 30, and the stability of the lifting motion of the second lifting plate 72 can be effectively improved through the second spring 74.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An injection mold of a diffusion lens comprises an upper base plate (10), an upper mold plate (20), a lower mold plate (30), a lower mold base (40) and a lower base plate (50) which are sequentially arranged from top to bottom, wherein an injection molding main runner (21) is arranged in the upper mold plate (20), and an injection molding sub-runner (31) which is positioned right below the injection molding main runner (21) is arranged at the top of the lower mold plate (30), the injection mold is characterized in that n lens concave mold cavities (22) are arranged at the bottom of the upper mold plate (20), n is an integer which is greater than 1, n lens concave mold cavities (32) which are respectively positioned right below the lens concave mold cavities (22) are arranged at the top of the lower mold plate (30), and the lens concave mold cavities (32) are respectively connected to each end of the injection molding sub-runner (31);

be equipped with convex mould piece (33) in mirror seat die cavity (32), be connected with at the bottom of the chamber of mirror seat die cavity (32) and be annular lift hole (34), lift hole (34) around with the below of convex mould piece (33) is all around, sliding connection has annular liftout cover (60) in lift hole (34), the top surface of liftout cover (60) is coarse structure face (601), be equipped with in die holder (40) and go up and down to give way chamber (41), go up and down to give way and be equipped with elevating system (70) in chamber (41), elevating system (70) are connected liftout cover (60).

2. A diffusion lens injection mold according to claim 1, wherein a heating cavity (35) is provided in said male mold block (33), and a heating structure is provided in said heating cavity (35).

3. The injection mold of a diffusion lens according to claim 1, wherein the ejection sleeve (60) comprises two first ejection pillars (61) and second ejection pillars (62), the top surfaces of the first ejection pillars (61) and the second ejection pillars (62) are provided with the rough structure surface (601), the lifting mechanism (70) comprises a first lifting plate (71) and a second lifting plate (72), the first lifting plate (71) is located above the second lifting plate (72), the first ejection pillars (61) are fixed on the first lifting plate (71), and the second ejection pillars (62) are fixed on the second lifting plate (72); be equipped with first hole of stepping down (51) and second hole of stepping down (52) in lower bolster (50), be equipped with third hole of stepping down (721) in second lifter plate (72).

4. The injection mold for a diffusion lens as claimed in claim 3, wherein a first guide block (711) is fixed to a bottom of the first lifting plate (71), and the first guide block (711) is slidably connected to the first and third relief holes (51, 721).

5. The injection mold for a diffusion lens as claimed in claim 4, wherein a second guide block (722) is fixed to the bottom of the second lifting plate (72), and the second guide block (722) is slidably connected to the second receding hole (52).

6. The injection mold for a diffusion lens as claimed in claim 3, wherein a first spring (73) is connected between the first lifting plate (71) and the lower mold plate (30).

7. The injection mold for a diffusion lens as claimed in claim 6, wherein a second spring (74) is connected between the second lifting plate (72) and the lower mold plate (30).