Precise forming die for optical lens

Abstract

The utility model discloses a precise forming mold for an optical lens. The precise forming mold comprises a top plate, an upper mold plate, a lower mold plate, a bottom plate, a mold core plate, a mold cavity plate, a forming insert pin, a glue injection nozzle and a glue injection pipeline, the upper die plate and the lower die plate are connected through a guide column, the core plate is arranged at the bottom of the upper die plate, core structures are arranged on the two sides of the core plate respectively, the cavity plate is arranged at the top of the lower die plate, cavity structures are arranged on the two sides of the cavity plate respectively, and positioning clamping blocks are arranged at the two ends of each core structure. Positioning clamping grooves connected with the positioning clamping blocks in a matched mode are formed in the two ends of the cavity structure, and the mold core structure comprises at least two circles of mold core array rings of a concentric structure. Due to the arrangement of the positioning clamping blocks and the positioning clamping grooves, the positioning precision of the mold can be improved, and product surface defects caused by dislocation are prevented; the mold core structure is arranged to be a concentric array ring, a plurality of lens mold cores can be compactly and evenly distributed, the mold space is fully utilized, a plurality of optical lenses are formed in an injection molding mode at a time, and the large-batch production requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical lens mold field especially relates to a kind of optical lens precision forming mould. BACKGROUND

[0002] LED optical lens is the optical element for controlling LED light source light distribution, can be spotlight or light scattering treatment to light, to improve the optical performance and use effect of LED light source, optical lens has wide application in illumination, display and automobile field.

[0003] In the production process of optical lens, injection molding process is generally used for production;However, the positioning precision between core and cavity is low in the mold positioning process in the prior art optical lens mold, which leads to misplacement or deviation when the mold is closed, so that the surface of the molded product appears defect or optical distortion, so that it is difficult to meet the performance requirements of high-precision optical lens;At the same time, the production efficiency of traditional optical lens mold is low, which is difficult to meet the actual needs of mass production and high precision.

[0004] Therefore, the prior art has defects and needs to be improved. INVENTION CONTENTS

[0005] The utility model solves the technical problems that: provide a kind of production efficiency, the positioning precision of optical lens precision forming mould is high.

[0006] To achieve this purpose, the utility model adopts the following technical scheme: a kind of optical lens precision forming mould, including top plate, upper die plate, lower die plate, bottom plate, core plate, cavity plate, forming needle, glue nozzle and glue pipeline;

[0007] The top plate is provided on the top of the upper die plate, the upper die plate is provided above the lower die plate, the bottom plate is provided on the bottom of the lower die plate, the upper die plate and the lower die plate are connected by guide column, and the upper die plate can slide up and down along the guide column;

[0008] The core plate is provided on the bottom of the upper die plate, the core structure is respectively provided on both sides of the core plate, the cavity plate is provided on the top of the lower die plate, and the cavity structure is respectively provided on both sides of the cavity plate;

[0009] The core structure is provided with positioning clamping block at both ends, and the cavity structure is provided with positioning clamping groove matched with the positioning clamping block at both ends;

[0010] The forming needle is located in the cavity structure, and a plurality of forming chambers for injection molding optical lens are formed between the core structure and the cavity structure;

[0011] The glue injection pipeline is communicated with the molding cavity on both sides of the cavity plate, the glue injection nozzle is arranged in the middle of the top plate and is connected with the glue injection pipeline, and the glue injection nozzle is used for injecting the molten resin into the molding cavity through the glue injection pipeline.

[0012] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0013] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0014] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0015] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0016] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0017] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0018] According to the technical scheme, the optical lens precision forming die further comprises a core fixing seat arranged at the bottom of the upper die seat, and the bottom of the core fixing seat is provided with a positioning sliding groove for accommodating the core insert.

[0019] Compared with the prior art, the optical lens precision forming die has the following beneficial effects:

[0020] The utility model discloses when the upper template is closed mould along with the guide column sliding down, and the core structure and the cavity structure are accurate butt joint, and form a plurality of forming chambers for forming optical lens, and the both ends of the core structure are provided with positioning clamping blocks, and the both ends of the cavity structure are provided with the positioning clamping groove that cooperates with it, and thus, the positioning accuracy of mould closing can be improved, and the product surface defect or optical distortion caused by misplacement is prevented, in addition, the forming insert is located in the cavity structure, and can play the role of supporting and assisting forming, the core structure is provided as the concentric array ring, and a plurality of lens cores can be compactly and evenly distributed, so that the mould space is fully utilized, a plurality of optical lenses can be formed in one injection cycle, the production efficiency of optical lens is greatly improved, and the demand of mass production is met. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0022] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the limiting conditions that can be implemented by the utility model, so they do not have the technical essence, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be produced by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0023] Figure 1 It is the separation structure schematic diagram between the upper template and the lower template of the utility model;

[0024] Figure 2 It is the core plate installation structure schematic diagram of the utility model;

[0025] Figure 3 It is the cavity plate installation structure schematic diagram of the utility model;

[0026] Figure 4 It is the core plate structure schematic diagram of the utility model;

[0027] Figure 5 It is the forming insert structure schematic diagram of the utility model;

[0028] Figure 6 It is the overall structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0029] In order to make the utility model of the utility model purpose, characteristics, advantages can be more obvious and easy to understand, the following will be combined with the utility model embodiment of the drawings, the technical scheme in the utility model embodiment is clearly and completely described, obviously, the following described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor are within the scope of the utility model.

[0030] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0031] The technical scheme of the utility model will be further illustrated below by combining the drawings and through specific embodiments.

[0032] As Figures 1 to 6 shown, the utility model embodiment provides a precision forming mold for optical lens, including top plate 1, upper die plate 2, lower die plate 3, bottom plate 4, core plate 21, cavity plate 31, forming insert 32, glue injection nozzle 51 and glue injection pipeline 52;The top plate 1 is arranged at the top of the upper die plate 2, the upper die plate 2 is arranged above the lower die plate 3, the bottom plate 4 is arranged at the bottom of the lower die plate 3, the upper die plate 2 and the lower die plate 3 are connected through guide column 6, the upper die plate 2 can slide up and down along the guide column 6;Guide column 6 can provide stable guidance during the closing process, preventing the upper die plate 2 and the lower die plate 3 from being dislocated.

[0033] The core plate 21 is arranged at the bottom of the upper mold plate 2, and core structures 210 are arranged at both sides of the core plate 21. The cavity plate 31 is arranged at the top of the lower mold plate 3, and cavity structures 310 are arranged at both sides of the cavity plate 31. The core structures 210 are provided with positioning clamping blocks 211 at both ends, and the cavity structures 310 are provided with positioning clamping grooves 311 adapted to connect with the positioning clamping blocks 211. The forming pin 32 is located in the cavity structure 310, and a plurality of forming chambers for injection molding optical lenses are formed between the core structure 210 and the cavity structure 310. When the upper mold plate 2 slides downward along the guide column 6 to close the mold, the core structure 210 and the cavity structure 310 are precisely connected to form a plurality of forming chambers for forming optical lenses. In order to avoid misalignment deviation of the core structure 210 and the cavity structure 310 during the closing process, the core structure 210 is provided with positioning clamping blocks 211 at both ends, and the cavity structure 310 is provided with positioning clamping grooves 311 at both ends. In this way, the positioning accuracy of the mold closing can be improved, and the surface defects or optical distortion caused by misalignment can be prevented. In addition, the forming pin 32 is located in the cavity structure 310, which can support and assist the forming process, so that the molten resin is uniformly distributed in the forming chamber during the injection molding process, and the shape and size of the optical lens meet the design requirements.

[0034] The glue injection pipeline 52 is communicated with the forming chambers at both sides of the cavity plate 31, the glue injection nozzle 51 is arranged in the middle of the top plate 1 and connected with the glue injection pipeline 52, and the glue injection nozzle 51 is used for injecting the molten resin into the forming chamber through the glue injection pipeline 52. The glue injection nozzle 51 is arranged in the middle of the top plate 1 and connected with the glue injection pipeline 52, so that the molten resin can be quickly transported to the forming chamber through the glue injection pipeline 52 along the shortest path during injection molding. The glue injection pipeline 52 is communicated with the forming chamber, so that the molten resin can uniformly enter the plurality of forming chambers, and the stability of resin flow and the injection efficiency are improved.

[0035] As shown in Figure 4 Further, the core structure 210 includes at least two concentric core array rings 212, and the core array rings 212 are arranged in a ring structure by a plurality of lens cores 2120. By arranging the core structure 210 in a concentric array ring structure, the mold space can be utilized to the maximum extent, and the plurality of lens cores 2120 are compactly and uniformly distributed on the core plate 21, so that a plurality of optical lenses can be produced at the same time in one injection molding cycle, thereby improving the production efficiency and meeting the mass production demand.

[0036] As shown in Figure 2 and Figure 3As shown, further, four corners of the cavity plate 31 are respectively provided with positioning protrusions 30, and four corners of the core plate 21 are respectively provided with positioning recesses 20, which are positioned and abutted with the positioning protrusions 30. In this way, the accuracy of mold closing can be improved, and the forming error caused by inaccurate positioning can be avoided.

[0037] As shown in Figure 3 and Figure 5 As shown, further, the top of the forming pin 32 is provided with an arc-shaped groove 320. The arc-shaped groove 320 at the top of the forming pin 32 can guide and shape the flowing resin, so as to form an optical lens with an arc surface structure in the forming chamber.

[0038] As shown in Figure 4 As shown, further, the positioning clamping block 211 is in a U-shaped structure. When the U-shaped positioning clamping block 211 on the core plate 21 gradually contacts the positioning clamping groove 311 on the cavity plate 31, the U-shaped positioning clamping block 211 aligns with the positioning clamping groove 311, and can gradually guide the core structure 210 into position during mold closing, thereby playing an accurate positioning role. In addition, the U-shaped structure can also enhance the mechanical strength of the positioning clamping block 211, so as to ensure that it is not easily worn during long-term repeated mold opening and closing, thereby maintaining the working accuracy and service life of the mold as a whole.

[0039] As shown in Figure 3 As shown, further, a plurality of ejector pins 7 are vertically arranged on the bottom plate 4 and penetrate the lower mold plate 3. The ejector pins 7 are used to eject the optical lens in the forming chamber upward when the mold is opened. During the injection molding process, after the molten resin fills the forming chamber and cools and solidifies, the optical lens product will have a certain adhesion. The distributed structure of the plurality of ejector pins 7 can reasonably disperse the ejection force according to the shape of the optical lens, so as to avoid deformation of the optical lens caused by excessive force on a single point.

[0040] As shown in Figure 1 and Figure 2 As shown, further, the upper mold plate 2 and the lower mold plate 3 are both provided with cooling pipelines 8 inside. The cooling pipelines 8 are used to pass in cooling medium to cool the optical lens in the forming chamber. By arranging the cooling pipelines 8 inside the upper mold plate 2 and the lower mold plate 3, the cooling medium can circulate and flow inside the mold, so as to rapidly take away the excess heat. In this way, not only can the resin solidification time be shortened and the production efficiency be improved, but also the temperature gradient of each part of the mold can be effectively controlled, so as to ensure the consistent thermal expansion of the product and avoid the influence of heat accumulation on the forming accuracy of the optical lens.

[0041] The above-described above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical lens precision molding mold characterized by, The injection mold comprises a top plate, an upper mold plate, a lower mold plate, a bottom plate, a core plate, a cavity plate, a forming pin, a glue injection nozzle and a glue injection pipeline. The top plate is arranged on the top of the upper mold plate, the upper mold plate is arranged above the lower mold plate, the bottom plate is arranged on the bottom of the lower mold plate, the upper mold plate and the lower mold plate are connected through guide columns, and the upper mold plate can slide up and down along the guide columns. The core plate is arranged on the bottom of the upper mold plate, and core structures are arranged on both sides of the core plate. The core structures are provided with positioning clamping blocks at both ends, and the cavity structures are provided with positioning clamping grooves adapted to the positioning clamping blocks at both ends. The forming pin is located in the cavity structure, and a plurality of forming cavities for injection molding optical lenses are formed between the core structure and the cavity structure. The glue injection pipeline is in communication with the forming cavities on both sides of the cavity plate, the glue injection nozzle is arranged in the middle of the top plate and connected with the glue injection pipeline, and the glue injection nozzle is used for injecting molten resin into the forming cavities through the glue injection pipeline.

2. The precision molding die for optical lenses according to claim 1, characterized in that, The core structure comprises at least two core array rings in a concentric structure.

3. The precision molding die for optical lenses according to claim 1, characterized in that, The four corners of the cavity plate are respectively provided with positioning protrusions, and the four corners of the core plate are respectively provided with positioning grooves.

4. The precision molding die for optical lenses according to claim 1, characterized in that, The top of the forming pin is provided with an arc-shaped groove.

5. The precision molding die for optical lenses according to claim 1, characterized in that, The positioning clamping block is in a U-shaped structure.

6. The precision molding die for optical lenses according to claim 1, characterized in that, The mold further comprises a plurality of ejector pins vertically arranged on the bottom plate and penetrating the lower mold plate, and the ejector pins are used for ejecting the optical lenses in the forming cavities upward when the mold is opened.

7. The precision molding die for optical lenses according to claim 1, characterized in that, The upper mold plate and the lower mold plate are both provided with cooling pipelines for introducing cooling medium to cool the optical lenses in the forming cavities.

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