阅读说明：本技术 一种制造微角锥阵列结构工作模带的装置及其制造方法 (Device and method for manufacturing working die belt with micro pyramid array structure ) 是由 王宏 胡浩亨 柯胜招 林进家 季康 朱翀 于 2019-11-18 设计创作，主要内容包括：本发明公开了一种制造微角锥阵列结构工作模带的装置及其制造方法,包括圆筒、母模,母模设于圆筒内表面上,母模在背向圆筒内表面的一侧表面上设有微角锥阵列结构,圆筒包括第一弧形支撑板、第二弧形支撑板、铰链、锁紧装置,第一弧形支撑板、第二弧形支撑板的一端通过铰链转动连接,第一弧形支撑板、第二弧形支撑板的另一端通过锁紧装置连接并锁紧,母模上设有第一开合边、第二开合边,第一开合边与第二开合边紧密配合。本发明能够赋予母模足够的刚性,减少脱模过程中因扭曲、弯折等形变导致的母模受损,有利于母模的脱模,从而提升了母模的重复利用频次,并有效改善和提升由此所得到的工作模带拼接缝的质量水平。(The invention discloses a device for manufacturing a working mold belt with a micro-pyramid array structure and a manufacturing method thereof. The invention can endow the female die with enough rigidity, reduce the damage of the female die caused by deformation such as distortion, bending and the like in the demolding process, and is beneficial to demolding the female die, thereby improving the recycling frequency of the female die and effectively improving and promoting the quality level of the splicing seam of the working die belt obtained by the method.)

1. The utility model provides an apparatus in manufacturing little pyramid array structure working die area, includes drum (1), master model (2) set up on drum (1) internal surface, master model (2) are provided with little pyramid array structure (24) on the side surface that faces away from drum (1) internal surface, its characterized in that: the cylinder (1) comprises a first arc-shaped supporting plate (11), a second arc-shaped supporting plate (12), a hinge (4) and a locking device (5), one end of the first arc-shaped supporting plate (11) and one end of the second arc-shaped supporting plate (12) are rotationally connected through the hinge (4), the other end of the first arc-shaped supporting plate (11) and the other end of the second arc-shaped supporting plate (12) are connected and locked through the locking device (5), a first opening and closing edge (22) is arranged on the female die (2) and corresponds to the end part of the first arc-shaped supporting plate (11) provided with the locking device (5), a second opening and closing edge (23) is arranged on the female die (2) and corresponds to the end part of the second arc-shaped supporting plate (12) provided with the locking device (5), the first opening and closing edge (22) is tightly matched with the second opening and closing edge (23).

2. The apparatus according to claim 1, wherein the apparatus comprises: the electric heating drum is characterized by further comprising at least one conductive belt (3), wherein the conductive belt (3) is vertically arranged on the outer side surface of the drum (1).

3. The apparatus according to claim 1, wherein the apparatus comprises: the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12) are stainless steel plates or nickel plates.

4. The apparatus according to claim 1, wherein the apparatus comprises: the thicknesses of the first arc-shaped support plate (11) and the second arc-shaped support plate (12) are 10-30 mm.

5. The apparatus according to claim 1, wherein the apparatus comprises: the inner side surface of the cylinder (1) is provided with a conductive adhesive, and the female die (2) is bonded with the cylinder (1) through the conductive adhesive.

6. The apparatus according to claim 1, wherein the apparatus comprises: the first arc-shaped support plate (11) comprises at least two arc-shaped support units (111), and adjacent arc-shaped support units (111) are hinged with each other.

7. The apparatus according to claim 1, wherein the apparatus comprises: the diameter of the cylinder (1) is 500-1500mm, and the height is 600-1700 mm.

8. The apparatus according to claim 7, wherein the apparatus comprises: the female die (2) is a thin plate made of nickel, and the thickness of the thin plate is 0.2-2 mm.

9. The apparatus according to claim 1, wherein the apparatus comprises: the female die (2) comprises at least two splicing units (21), the splicing units (21) are arranged on the inner surface of the cylinder (1), and the edge of each splicing unit (21) is flush and butted with the edge of the adjacent splicing unit (21).

10. The method for manufacturing the device for manufacturing the working mold strip of the micro pyramid array structure according to claim 1, wherein: the method comprises the following steps:

a. cutting a stainless steel plate or a nickel plate, and bending the stainless steel plate or the nickel plate by a plate bending machine to form a cylinder (1);

b. c, equally cutting the cylinder (1) bent in the step a into a first arc-shaped support plate (11) and a second arc-shaped support plate (12) along the height direction;

c. hinges (4) are arranged at one end of the first arc-shaped supporting plate (11) and one end of the second arc-shaped supporting plate (12), and one end of the first arc-shaped supporting plate (11) is rotatably connected with one end of the second arc-shaped supporting plate (12) through the hinges (4);

d. a locking device (5) is arranged at the other end of the first arc-shaped supporting plate (11) and the other end of the second arc-shaped supporting plate (12);

e. taking a female die (2) which is consistent with the cylinder (1) in size and provided with a micro-pyramid array structure (24) on the surface, and dividing a first opening-closing edge (22) and a second opening-closing edge (23) on the female die (2);

f. coating conductive adhesive on the inner sides of a first arc-shaped support plate (11) and a second arc-shaped support plate (12), attaching one side, which is not provided with a micro-pyramid array structure (24), of a female die (2) on the conductive adhesive, aligning the end part, provided with a locking device (5), of a first opening and closing edge (22) of the female die (2) with the end part, provided with the locking device (5), of the first arc-shaped support plate (11), aligning the end part, provided with the locking device (5), of the second opening and closing edge (23) of the female die (2) with the end part, provided with the locking device (5), of the second arc-shaped support plate (12), connecting and locking the other end of the first arc-shaped support plate (11) and the other end of the second arc-shaped support plate (12) in a surrounding manner through the.

11. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: in the step e, the female die (2) with the micro pyramid array structures (24) arranged on the surface is cut into the splicing units (21) with the sizes and the sizes consistent with those of the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12), in the step f, one side, which is not provided with the micro pyramid array structures (24), of each splicing unit (21) is attached to the conductive adhesive along the cutting end faces of the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12) in a flush mode, and each splicing unit (21) is firmly bonded with the inner sides of the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12) respectively.

12. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: in the step b, the first arc-shaped supporting plate (11) is further cut into at least two arc-shaped supporting units (111), and the arc-shaped supporting units (111) are hinged.

13. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: and c, rounding the cylinder (1) obtained in the step a by using rounding equipment, wherein the roundness of the cylinder (1) subjected to rounding treatment is 0.01-0.1 mm.

14. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: and c, polishing the inner side of the cylinder (1) obtained in the step a, wherein the surface roughness of the cylinder (1) after polishing is 6-14 grades.

15. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: in the step b, chamfers are further arranged at the cutting end faces of the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12).

16. The method for manufacturing the device for manufacturing the working mold strip of the micro-pyramid array structure according to claim 10, wherein: in the step b, the cutting end faces of the first arc-shaped supporting plate (11) and the second arc-shaped supporting plate (12) are subjected to precision trimming treatment, the roughness of the cutting end faces subjected to precision trimming treatment is 6-14 levels, and the straightness is 0.001-0.01 mm.

Technical Field

The invention relates to the field of manufacturing of a working die belt with a micro pyramid array structure, in particular to a device for manufacturing the working die belt with the micro pyramid array structure and a manufacturing method thereof.

Background

The microprism type reflecting material can provide a longer visible distance for drivers and passengers due to the excellent retroreflection performance, and is widely applied to the field of personal, vehicle and road traffic safety protection at present, and is used for travel protection and navigation of people. The core of the microprism reflecting material is a micro-angle cone array structure which plays a role in reflecting incident light, and in the actual production, the micro-angle cone array structure can be formed on one side surface of a high polymer film material by various processes or methods.

Such as: the invention patent with the publication number of CN101561523B entitled "method for producing reflective film with microprism array structure" discloses a method for forming microprism array structure by using photosensitive resin, which comprises coating photosensitive resin on a resin film based on an annular working mold belt with microprism array structure on the surface, closely attaching the side of the resin film coated with photosensitive resin to the annular belt mold, irradiating by UV light source synchronously, rapidly curing the photosensitive resin filling the gap of microprism array structure, and peeling the resin film from the annular belt mold to obtain microprism reflective film.

Such as: the No. CN102176082B entitled "method for producing reflective film with microprism array structure" discloses a method for forming microprism array structure by using hot melt resin, which is based on a reciprocating annular mold, coating the surface of a resin film with hot melt resin, applying pressure to make the molten hot melt resin fill the gap of the microprism array structure on the surface of the annular mold, cooling synchronously to shape the hot melt resin, and stripping the resin film from the annular mold, thereby obtaining the reflective film with microprism array structure. There are also many patents disclosing apparatus for producing reflective films having microprism array structures based on an annular mold belt, and thus the annular belt-shaped working mold has become a key core component for producing microprism reflective films.

It is known that precision parts with fine structures can be accurately copied by electroforming, and a master mould with a micro-pyramid array structure is copied by electroforming to obtain a cylindrical working mould strip, which is the first choice in the industry. The invention patent application with the application publication number of CN104962956A and the name of 'a manufacturing process of a cylindrical microprism mold' discloses a manufacturing method of a cylindrical mold with a microprism array structure on the surface, which comprises the following steps: butting two sides of a flat plate mould to manufacture a first cylinder mould; obtaining a second cylinder mould by electroforming copy at the outer side of the first cylinder mould; and obtaining a cylinder working mold through electroforming copy on the inner side of the second cylinder mold. The working mold band is obtained by multiple copying, so that the process is complex, the efficiency is low, the size precision and the appearance precision of the micro-angle cone array structure can be influenced by the multiple copying, and the retroreflection performance of the prepared reflecting film is obviously reduced; and when obtaining the second drum mould, the first drum mould as the negative pole is peeled off, when obtaining the drum working die area, the second drum mould as the negative pole is peeled off, this kind of negative pole drum can only once only utilize the drawing of patterns mode, consuming time and difficultly, let manufacturing cost be high and be unfavorable for industrial production, in the in-process of peeling off the negative pole mould, also lead to finally obtaining because of misoperation to take damage easily, and then influence the outward appearance and the performance of reflective membrane.

The invention patent with application publication number CN106702440A entitled "electroforming equipment and method for preparing large seamless microprism template" discloses a method for preparing a large seamless microprism working mold strip, which comprises: preparing a flat plate mold, fixing L-shaped fixing strips on two sides of the flat plate mold along the width direction by using epoxy resin, enclosing the flat plate mold into a cylindrical mold by using the L-shaped fixing strips, and performing electroforming by using the cylindrical mold as a master mold to copy a working mold strip. When the working mold belt is taken, the L-shaped fixing strip on the female mold is detached, and the female mold is opened, so that the female mold is reused and the working mold belt is prevented from being damaged. The method effectively improves the copying efficiency of the working die belt and reduces the production cost of the working die belt. But simple come the fixed drum mould that surrounds through L type fixed strip, can't effectively guarantee to surround the department concatenation parallel and level, height unanimity, the gap meeting width of concatenation department on the work mould area that obtains from this differs, the height is uneven to efficiency and the life in work mould area when influencing reflective membrane production, and then influence the outward appearance and the performance of reflective membrane, raise the manufacturing cost of reflective membrane. Meanwhile, due to the thickness of the flat mold, the rigidity of the cylindrical female mold formed by bending is not high, the female mold is easy to distort and deform when opened, the recycling frequency of the female mold is affected, and the production cost of the reflective film is high.

Disclosure of Invention

The invention provides a novel device for manufacturing a working die belt with a micro pyramid array structure and a manufacturing method thereof, aiming at the defects that the working die belt manufactured by the device for manufacturing the working die belt with the micro pyramid array structure in the prior art has different gap widths and uneven joints, and a master die is easy to distort and deform when opened, so that the frequency of recycling the master die is influenced, and the like.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the device for manufacturing the working mold belt with the micro pyramid array structure comprises a cylinder and a female mold, wherein the female mold is arranged on the inner surface of the cylinder, the female die is provided with a micro-pyramid array structure on the surface of one side back to the inner surface of the cylinder, the cylinder comprises a first arc-shaped supporting plate, a second arc-shaped supporting plate, a hinge and a locking device, one end of the first arc-shaped supporting plate and one end of the second arc-shaped supporting plate are rotatably connected through the hinge, the other end of the first arc-shaped supporting plate and the other end of the second arc-shaped supporting plate are connected and locked through the locking device, a first opening and closing edge is arranged on the female die and corresponds to the end part of the first arc-shaped supporting plate provided with the locking device, and a second opening and closing edge is arranged on the female die and corresponds to the end part of the second arc-shaped supporting plate provided with the locking device, and the first opening and closing edge is tightly matched with the second opening and closing edge.

Through mutually supporting of first arc backup pad, second arc backup pad, hinge, locking device for the drum can freely be opened as required and lock, and the master model sets up on the drum internal surface, through the support of first arc backup pad, second arc backup pad, can give the sufficient rigidity of master model, reduces the master model that the deformation such as distortion, buckling leads to among the drawing of patterns process impaired, is favorable to the drawing of patterns of master model, thereby has promoted the reuse frequency of master model. And the first opening and closing edge and the second opening and closing edge are tightly matched and correspond to the end parts of the first arc-shaped supporting plate and the second arc-shaped supporting plate, which are provided with the locking devices, so that the quality level of the splicing seam of the working mold strip obtained by the method is effectively improved and promoted.

Preferably, the device for manufacturing the operating mold strip with the micropyramid array structure further comprises at least one conductive strip, and the conductive strip is vertically arranged on the outer side surface of the cylinder.

With the vertical outside surface that sets up the drum of conductive band, rather than directly contacting the conductive band with the master model, can reduce the harm of conductive band to the master model on the one hand, the electric current of carrying when can increase the copy in addition reduces the copy time, promotes copy efficiency.

Preferably, in the above apparatus for manufacturing a working mold strip with a micropyramid array structure, the first arc-shaped support plate and the second arc-shaped support plate are stainless steel plates or nickel plates.

Stainless steel board or nickel board are difficult for taking place chemical reaction with electroforming liquid medicine, can promote the life of first arc backup pad, second arc backup pad and electroforming liquid medicine on the one hand, and on the other hand can prevent to produce impurity and influence the quality of the work mould area that the copy obtained in the electroforming liquid medicine.

Preferably, in the above apparatus for manufacturing a working mold strip with a micropyramid array structure, the thickness of the first arc-shaped support plate and the second arc-shaped support plate is 10-30 mm.

Within the thickness range, the first arc-shaped supporting plate and the second arc-shaped supporting plate have enough rigidity, the weight is not too heavy, and the operation is convenient when the device is used.

Preferably, in the above apparatus for manufacturing a working mold belt with a micropyramid array structure, a conductive adhesive is disposed on an inner surface of the cylinder, and the master mold is bonded to the cylinder through the conductive adhesive.

The conductive adhesive can enable current to be transmitted to the master die through the cylinder and applied to the surface of the master die more uniformly, so that larger current can be applied during electroforming, the copying time is effectively shortened, and the copying quality and the copying efficiency are improved.

Preferably, in the apparatus for manufacturing a working mold strip with a micropyramid array structure, the first arc-shaped support plate comprises at least two arc-shaped support units, and adjacent arc-shaped support units are hinged with each other.

The arc support unit can further reduce the angle of opening and shutting of first arc backup pad at the in-process that opens and shuts to reduce the extrusion of first arc backup pad in-process to the master model that opens and shuts, prevent that the master model from warping at the in-process that opens and shuts, guarantee that the work mould that the copy obtained has better circularity and roughness.

Preferably, in the above apparatus for manufacturing a working mold strip with a micropyramid array structure, the cylinder diameter is 500-1500mm, and the height is 600-1700 mm.

The cylinder is too small, so that the copied working mold belt is relatively small, and the working efficiency is obviously influenced and limited when the working mold belt is subsequently utilized to copy the micro-pyramid array structure on the surface of the polymer plastic film; the excessively large cylinder results in a long manufacturing period of the working die belt, increased risks of strain and deformation of the working die belt during transportation and turnover, and increased manufacturing costs and manufacturing risks of production equipment for carrying the working die belt. The diameter and the height of the cylinder are limited in the range, so that the production efficiency and the cost can be considered, and the manufacturing of the working die belt and the processing operation of the subsequent process are facilitated.

Preferably, in the above apparatus for manufacturing a working mold strip with a micropyramid array structure, the master mold is a thin plate made of nickel and has a thickness of 0.2-2 mm.

The thin plate made of nickel can be effectively prevented from reacting with electroforming liquid medicine, the thickness of the thin plate is limited in the range, so that the thin plate has certain rigidity and good flexibility, and a female die can be attached to the cambered surfaces of the first arc-shaped support plate and the second arc-shaped support plate more tightly.

Preferably, the master die comprises at least two splicing units, the splicing units are arranged on the inner surface of the cylinder, and the edge of each splicing unit is flush and butted with the edge of the adjacent splicing unit.

The female die is provided with at least two splicing units, so that the female die can be better constructed when being tightly attached to the inner sides of the first arc-shaped supporting plate and the second arc-shaped supporting plate, and the construction convenience is improved; simultaneously produce deformation when preventing the master model laminating better, promote the laminating roughness, can also let the edge of master model and the edge of first arc backup pad, second arc backup pad more parallel and level when laminating.

Preferably, the manufacturing method of the device for manufacturing the working mold strip of the micro pyramid array structure comprises the following steps:

a. cutting a stainless steel plate or a nickel plate, and bending the stainless steel plate or the nickel plate by a plate bending machine to form a cylinder;

b. c, equally cutting the cylinder bent in the step a into a first arc-shaped support plate and a second arc-shaped support plate along the height direction;

c. hinges are arranged at one end of the first arc-shaped supporting plate and one end of the second arc-shaped supporting plate, and one end of the first arc-shaped supporting plate and one end of the second arc-shaped supporting plate are rotatably connected through the hinges;

d. locking devices are arranged at the other end of the first arc-shaped supporting plate and the other end of the second arc-shaped supporting plate;

e. taking a female die which has the same size and size with the cylinder and is provided with a micro-pyramid array structure on the surface, and dividing a first opening and closing edge and a second opening and closing edge on the female die;

f. coating conductive adhesive on the inner sides of the first arc-shaped support plate and the second arc-shaped support plate, attaching one side, which is not provided with the micro-pyramid array structure, of the female die to the conductive adhesive, aligning a first opening and closing edge of the female die with the end part, which is provided with the locking device, of the first arc-shaped support plate, aligning a second opening and closing edge of the female die with the end part, which is provided with the locking device, of the second arc-shaped support plate, and encircling, connecting and locking the other end of the first arc-shaped support plate and the other end of the second arc-shaped support plate through the locking device to obtain a device for manufacturing a working die belt of the micro-.

The device for manufacturing the working mold strip with the micro-angle cone array structure, which is manufactured by the method, can greatly improve the recycling frequency of the female mold, effectively improve the quality level of the splicing seams of the working mold strip, and eliminate the phenomena of uneven splicing seams and different widths, so that the production efficiency of the reflective film is improved, the attenuation rate of the retroreflection performance of the reflective film is reduced, and the comprehensive production cost of the reflective film is further reduced.

Preferably, in the step e, the female die with the micropyramid array structure on the surface is cut into the splicing units with the sizes consistent with those of the first arc-shaped supporting plate and the second arc-shaped supporting plate, and in the step f, one side of each splicing unit without the micropyramid array structure is attached to the conductive adhesive in a flush manner along the cutting end faces of the first arc-shaped supporting plate and the second arc-shaped supporting plate, so that each splicing unit is firmly bonded with the inner sides of the first arc-shaped supporting plate and the second arc-shaped supporting plate respectively.

Through above step, can let the laminating of master model and first arc backup pad, second arc backup pad more level and more smooth, master model and first arc backup pad, second arc backup pad can align better when the edge construction moreover. The conductive adhesive can enable the current on the cylinder to be quickly and uniformly conducted to the female die, and the electroforming efficiency is improved.

Preferably, in the above method for manufacturing the apparatus for manufacturing the operating die strip of the micropyramid array structure, in the step b, the first arc-shaped support plate is further cut into at least two arc-shaped support units, and each arc-shaped support unit is hinged.

The arc supporting unit obtained through the steps can further reduce the opening and closing angle of the first arc supporting plate in the opening and closing process, so that the extrusion of the first arc supporting plate on the female die and the working die belt in the opening and closing process is reduced, the female die is prevented from deforming in the opening and closing process, and the working die obtained is guaranteed to have better roundness and flatness.

Preferably, in the method for manufacturing the apparatus for manufacturing the operating die strip with the micropyramid array structure, the cylinder obtained in the step a is further subjected to a rounding treatment by a rounding device, and the roundness of the cylinder after the rounding treatment is 0.01-0.1 mm.

Through the steps, the roundness of the work die strip obtained by copying can be improved, and the deformation quantity of the microprism reflecting material on the surface of the work die strip is effectively reduced, so that the retroreflection performance of the microprism reflecting material produced by the work die strip is not attenuated.

Preferably, in the manufacturing method of the device for manufacturing the operating die strip with the micropyramid array structure, the inner side of the cylinder obtained in the step a is further subjected to polishing treatment, and the surface roughness of the cylinder after the polishing treatment is 6-14 levels.

Through the steps, the female die can be attached to the inner sides of the first arc-shaped supporting plate and the second arc-shaped supporting plate more tightly, and the female die is prevented from being partially separated or deformed in the copying process to influence the quality of the obtained working die belt.

Preferably, in the above method for manufacturing the apparatus for manufacturing the operating die strip with the micropyramid array structure, in the step b, the cut end surfaces of the first arc-shaped support plate and the second arc-shaped support plate are further provided with chamfers.

The setting of chamfer can let the piece of first arc backup pad, second arc backup pad piece department joint reduce as far as possible, promotes first arc backup pad, the leakproofness of second arc backup pad under the closure state simultaneously to improve the piece quality in the working die area that obtains.

Preferably, in the step b, the cut end surfaces of the first arc-shaped support plate and the second arc-shaped support plate are precisely trimmed, and the cut end surfaces after the precise trimming have a roughness of 6 to 14 degrees and a straightness of 0.001 to 0.01 mm.

Through above step, can let first arc backup pad, second arc backup pad limit inseparabler with the piece joint laminating on limit, promote the adherence of piece joint, reduce the difference in height of piece joint to effectively promote the parallel and level degree of work mould area concatenation seam, eliminate the burr phenomenon, and then promote the production efficiency during follow-up production.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention in an open state;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a schematic structural view of the present invention in a locked state;

FIG. 5 is a partial enlarged view of portion B of FIG. 4;

FIG. 6 is a first schematic structural view of the present invention in a demolded state;

FIG. 7 is an enlarged view of a portion C of FIG. 6;

FIG. 8 is a second schematic structural view of the present invention in a demolded state.

Detailed Description

The invention will be described in further detail below with reference to the accompanying figures 1-8 and the detailed description, but they are not intended to limit the invention: