CN216832013U

CN216832013U - Avoid bad HUD speculum mould of edge formation of image

Info

Publication number: CN216832013U
Application number: CN202220384525.XU
Authority: CN
Inventors: 张守城; 郭成凯; 林洁文; 黄嘉玲
Original assignee: Fujian Fulan Optics Co ltd
Current assignee: Fujian Fulan Optics Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-06-28
Anticipated expiration: 2032-02-24

Abstract

The utility model provides a HUD reflector mold for avoiding bad edge imaging, which comprises a front mold core and a rear mold core, wherein the front mold core and the rear mold core are arranged up and down, the lower surface of the front mold core is provided with an annular groove, a front mold frame is arranged in the annular groove, the upper surface of the rear mold core is provided with a mold cavity for injection molding to form the HUD reflector, and the lower surface of the front mold frame is a fine grain surface matched with a fine grain region of the periphery of the HUD reflector; the utility model discloses simple structure, the simple operation realizes carrying out the regional thin dermatoglyph of edge shrink to it when HUD speculum production and handles, avoids marginal formation of image bad.

Description

Avoid bad HUD speculum mould of edge formation of image

Technical Field

The utility model relates to an optical mold technical field, especially an avoid bad HUD speculum mould of edge formation of image.

Background

Head Up Display (HUD) is hereinafter referred to as HUD. And has become increasingly popular in the automotive field. The function of the system is mainly driving assistance, and central control information, navigation information, part of man-machine interaction information and the like are projected on the windshield. So as to avoid driving risks caused by actions of raising and lowering head and the like during the information processing operation of the driver.

The HUD mirror (hereinafter referred to as the mirror) is a key component of the overall HUD system. The mirror is a mirror that functions to reflect the driving assistance information required in the imaging system onto the windshield. Most of the existing reflecting mirrors in the industry are realized by the following processes: the plastic (generally adopting black PC or black COC) is subjected to injection molding and then is subjected to total reflection aluminum plating to meet the functional requirement of a curved surface total reflection mirror. The important factor that the image in the HUD system can be accurately reflected by the reflector is that the actual curved surface shape of the reflector is very close to the original optical design, and especially, sudden change of local surface shape cannot occur, and if the sudden change of surface shape causes problems such as distortion and blur reflected from the area, the reading accuracy of a driver is affected, and the driving experience is affected, even traffic accidents are caused. However, the injection-molded reflector has a fatal problem existing in the common injection-molded piece: slight shrinkage marks are present on all the edges of the injection-molded part, and the width of the circumferential shrinkage mark on the reflector in the industry is currently about 2-3 mm. The slight sink mark represents that the surface shape of the peripheral surface of the reflector is uneven, and the uneven peripheral area is coated with a total reflection film and then participates in reflection imaging in the HUD system, so that the problems of image distortion, deformation and the like are caused.

Disclosure of Invention

In view of this, the utility model aims at realizing carrying out the regional thin dermatoglyph of edge shrink to it when HUD speculum production and handling, avoid the bad HUD speculum mould of edge formation of image.

The utility model discloses a following method realizes: the utility model provides an avoid bad HUD speculum mould of edge formation of image, includes preceding mold core and back mold core, preceding mold core with the back mold core sets up from top to bottom, the annular groove has been seted up to preceding mold core lower surface, be provided with preceding framed in the annular groove, the mould cavity that is used for moulding plastics to form the HUD speculum is offered to back mold core upper surface, preceding framed lower surface be with the regional matched with microgroove face of the microgroove of HUD speculum border.

Furthermore, the front mold frame is locked on the front mold core through a fastening screw, the front mold core and the front mold frame are matched to form a front mold, and the lower surface of the front mold frame is obliquely arranged from outside to inside.

Further, the contact distance between the edge of the front mold frame and the peripheral part of the HUD reflector is D.

Further, still include a coating film frock that is used for the HUD speculum coating film, the coating film frock includes the coating film frame, the bottom surface is provided with the arch and encloses the fender in the opening of coating film frame, both ends middle part all is seted up flutedly around the coating film frame upper surface.

Further, the arch encloses the arc that keeps off the cross-section for cooperating with the HUD speculum, the arch enclose the radian that keeps off with the radian of HUD speculum is unanimous, the arch encloses the structural thickness scope that keeps off and is 1-2 mm.

The beneficial effects of the utility model reside in that: the utility model solves the problem of the mold processing and maintenance troubles caused by different processing technologies of the optical mold and the fine-grained surface mold, realizes the fine-grained treatment of the edge shrinkage area of the reflector, and achieves the diffuse reflection of light to avoid the direct reflection of light; the coating tool effectively solves the problem that the edge of the reflector shields the coating, and the reflective film is not coated in the fine grain area of the reflector; the die and the tool are simple and convenient to operate, have no loss, high repeatability and good stability, and can meet the requirement of batch production; the reflector produced by the method effectively solves the phenomena of edge imaging distortion, blurring and the like of the traditional reflector in the HUD system; and technical breakthrough and benefit improvement are brought to enterprises.

Drawings

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

Fig. 2 is an enlarged view at a.

Fig. 3 is an exploded view of the structure of the present invention.

Fig. 4 is a schematic structural diagram of the coating tool.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present invention provides an embodiment: the utility model provides an avoid bad HUD speculum mould of edge formation of image, includes preceding mold core 1 and back mold core 2, preceding mold core 1 with back mold core 2 sets up from top to bottom, annular groove (not shown) has been seted up to 1 lower surface of preceding mold core, be provided with preceding die frame 3 in the annular groove, 2 upper surfaces of back mold core are offered and are used for moulding plastics the mould cavity 4 that forms the HUD speculum, 3 lower surfaces of preceding die frame be with the regional matched with microgroove face (not shown) of microgroove of HUD speculum border. Make preceding mold core 1 top be the optical surface for injection moulding speculum intermediate optical zone, preceding die frame 3 top curved surface is the microgroove face, is used as the microgroove area of injection moulding speculum border, is fixed in preceding die frame 3 with preceding mold core 1 on, and form the mould die cavity with the cooperation of front mould after 2 complete sets of moulds of back die core make up again, supply the speculum structure of moulding plastics to use.

Referring to fig. 1 to 3, in an embodiment of the present invention, the front mold frame 3 is locked to the front mold core 1 by fastening screws 31, the front mold core 1 and the front mold frame 3 cooperate to form a front mold, and a lower surface of the front mold frame 3 is inclined from outside to inside. The inner frame of the front mold frame 3 needs to be consistent with the protruding structure of the front mold core 1 in shape. The curved surface of the front mold frame 3 is a fine grain surface and is used as a fine grain area of the periphery of the injection molding reflector.

Referring to fig. 1 to 3, in an embodiment of the present invention, the contact distance between the edge of the front mold 3 and the periphery of the HUD reflector is D. The edge leakage dimension D of the front mold frame 3 is the peripheral fine-grained region (slightly shrunk region of the injection-molded edge) of the injection-molded reflector.

Please continue to refer to fig. 4, in an embodiment of the present invention, the present invention further includes a coating tool 5 for coating the HUD reflector, the coating tool 5 includes a coating frame 51, the bottom surface of the opening of the coating frame 51 is provided with a protrusion surrounding block 52, the middle portions of the front and rear ends of the upper surface of the coating frame 51 are provided with grooves 53, so as to facilitate taking out the HUD reflector after the coating is completed. Make when carrying out the coating film place coating film frame 51 on the HUD speculum, then enclose through the arch and keep off 52 and play the effect of shielding, can realize that the speculum border fine grained surface is not plated the reflectance coating when the coating film.

As shown in fig. 4, in an embodiment of the present invention, the cross section of the protrusion enclosure 52 is an arc shape matching with the HUD mirror, the radian of the protrusion enclosure 52 is consistent with the radian of the HUD mirror, and the structural thickness range of the protrusion enclosure 52 is 1-2 mm. The radian of the top surface of the convex enclosure 52, namely the contact surface assembled with the reflector fine-grained surface, must be consistent with the optical surface of the reflector to achieve effective shielding during coating, so that the reflector circumferential fine-grained surface is not coated with a reflective film during coating.

The utility model discloses a theory of operation: when the front mold core is used, the front mold core is arranged in the front mold frame, no section difference or gap exists on the top cambered surface after the front mold core and the front mold frame are assembled, and then the front mold is formed by locking and attaching the front mold core and the front mold frame through fastening screws. And (4) filling the assembled front mold and rear mold core into the whole set of mold. (conventional injection mold structures such as mold bases, water channels, runners, thimbles, gates, etc., are not discussed herein, but are not elaborated) the mold is loaded into an injection molding machine, plastic is added to the mold to adjust the injection molding process, etc. And (5) carrying out die assembly and injection molding on the black reflector substrate. (conventional injection molding processes are not discussed herein, and are not elaborated.) the resulting mirror is a black substrate with an optical surface in the middle and a fine textured surface on the periphery. And (3) putting the reflector substrate into a coating tool, wherein the fine-grained surface area of the periphery edge of the reflector is superposed with the surrounding baffle structure of the coating tool. And (4) putting the coating tool with the reflector into coating equipment, and debugging the coating process. And (3) finishing coating (the coating process is a conventional evaporation process, is not discussed in the text and is not specifically described), taking out the tool and the reflector, and obtaining a product with a coated total reflector effect in the middle optical area and a black fine-grained surface in the area of the edge periphery width D and no coating effect.

The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims

1. The utility model provides an avoid bad HUD speculum mould of edge formation of image which characterized in that: including preceding mold core and back mold core, preceding mold core with back mold core sets up from top to bottom, the annular groove has been seted up to preceding mold core lower surface, be provided with preceding framed in the annular groove, the mould cavity that is used for moulding plastics to form the HUD speculum is seted up to back mold core upper surface, preceding framed lower surface be with the regional matched with microgroove face of microgroove of HUD speculum border.

2. A HUD mirror mold for avoiding poor edge imaging according to claim 1, wherein: the front mold frame is locked on the front mold core through fastening screws, the front mold core and the front mold frame are matched to form a front mold, and the lower surface of the front mold frame is obliquely arranged from outside to inside.

3. A HUD mirror mold for avoiding poor edge imaging according to claim 1, wherein: the contact distance between the edge of the front mold frame and the peripheral part of the HUD reflector is D.

4. A HUD mirror mold for avoiding poor edge imaging according to claim 1, wherein: still include a coating film frock that is used for the HUD speculum coating film, the coating film frock is including the coating film frame, the bottom surface is provided with the arch and encloses the fender in the opening of coating film frame, all set up flutedly in the middle part of both ends around the coating film frame upper surface.

5. A HUD reflector mold for avoiding poor edge imaging according to claim 4, wherein: the arch encloses the arc that keeps off the cross-section for cooperating with the HUD speculum, the arch encloses the radian that keeps off with the radian of HUD speculum is unanimous, the arch encloses the structure thickness scope that keeps off and is 1-2 mm.