CN106430081A - Method for manufacturing cylindrical mould - Google Patents

Abstract

The invention discloses a method for manufacturing a cylindrical mould. The main steps are as follows: (1) processing a micro structure on a substrate, and making the micro structure into a planar template; (2) pouring a material on the planar template, and manufacturing a flexible motherboard; (3) fixing the flexible motherboard to a cylindrical inner surface to form a cylindrical flexible motherboard, and performing an electric conduction treatment on the surface of the cylindrical flexible motherboard; (4) using the conductive flexible motherboard as a cathode, performing electroforming in an electric sedimentation tank for a certain time, and stripping off circular-arc-shaped metal layers deposited on the surface of the flexible motherboard; (5) splicing multiple circular-arc-shaped metal layers to form a circular ring-shaped metal layer, wherein seams for connecting the metal layers form a circular ring-shaped metal layer; and (6) assembling the circular ring-shaped metal layer on a metal cylinder, filling a polymer material in the gap between the circular ring-shaped metal layer and the metal cylinder, and manufacturing the cylindrical mould after the polymer material solidifies. The cylindrical mould manufactured by the method has the advantages of easy process realization, low cost and capability of realizing continuous graph transfer.

Description

A kind of manufacturing method of cylindrical mold

technical field

The invention relates to a method for manufacturing a cylindrical mold, in particular to a method for manufacturing a cylindrical mold for continuous graphic processing, and belongs to the field of micro-nano manufacturing.

Background technique

In recent years, along with the improvement of product performance and quality with large-area functional surface micro-nano structures, micro-nano processing technology has gradually been widely recognized. The traditional micro-nano processing technology is mostly planar processing, and the mold required for pattern transfer is a flat mold. The technology is mature and has been widely used in production. However, for large-area or batch continuous production, the extremely low productivity of flat-panel molds and the gap formed between adjacent graphics by step-by-step graphics transfer limit its wide application.

The rolling and continuous transfer graphics technology of cylindrical molds not only inherits the advantages of high resolution of plane graphics transfer, but also has the characteristics of continuous replication, which makes the production cost low and the production rate higher, and has a very broad application prospect. Commonly used flat mold processing techniques include traditional lithography, electron beam lithography, laser interference lithography, and laser ablation processing, etc., which have the characteristics of high pattern transfer accuracy, mature technology, and the ability to manufacture nanoscale and micron-scale planar pattern arrays. However, due to many problems such as the difficulty in implementing the coating and exposure process of photoresist on the cylindrical surface when manufacturing cylindrical molds, and the low productivity of large-area molds manufactured by laser ablation technology, it is difficult to achieve the production of cylindrical molds with the traditional production process of flat molds. manufacture.

Contents of the invention

The object of the present invention is to provide a cylindrical mold manufacturing method with easy process and low cost, so as to realize the production and processing of large area and continuous pattern transfer.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

(1) Take a flat substrate, process the microstructure on the substrate, and make a planar template;

(2) Use the normal temperature injection molding process to cast the material with good anti-adhesion on the flat formwork to reproduce the flexible master;

(3) Bending and fixing the flexible master on the inner surface of a cylinder to form a cylindrical flexible master with a certain radian, and conducting conductive treatment on the surface of the cylindrical flexible master;

(4) Use the conductive cylindrical flexible master as the cathode, electroform in the electrodeposition tank, and after a certain period of time, peel off the arc-shaped metal layer electroformed and deposited on the surface of the cylindrical flexible master;

(5) Splice several arc-shaped metal layers deposited by electroforming to form a circular metal layer, and use the metal plate connection process to connect the seams between adjacent metal layers to form a seamless and complete ring shaped metal layer;

(6) Assemble the ring-shaped metal layer on a metal cylinder, keep the gap between the ring metal and the metal cylinder at the center uniform, pour liquid polymer material into the space between the ring-shaped metal layer and the metal cylinder In the gap, after solidification, it is trimmed and made into a cylindrical mold.

The manufacturing method of a cylindrical mold proposed by the invention has simple process, easy realization, low processing cost, high precision of pattern reproduction, and can realize continuous transfer and manufacture of patterns.

Description of drawings

Figure 1 is a schematic diagram of a planar template.

Fig. 2 is a schematic diagram of reproducing a flexible master on a planar template.

Figure 3 is a schematic diagram of the structure of the flexible master.

Fig. 4 is a schematic diagram of the flexible master board being fixed on the inner surface of the cylinder.

Fig. 5 is a schematic diagram of conducting conductive treatment on the flexible master mold.

Figure 6 is a schematic diagram of electroforming deposition.

7 is a schematic diagram of the structure of a single arc-shaped metal layer obtained by electroforming deposition.

FIG. 8 is a schematic diagram of the assembly of the arc-shaped metal layer.

Fig. 9 is a schematic diagram of the overall structure of a cylindrical mold.

Fig. 10 is a schematic diagram of the overall structure of the cylindrical mold.

The labels in the figure represent respectively:

1 is a flat template; 2 is a material with good anti-adhesion; 3 is a flexible master; 4 is a cylinder; 5 is a cylindrical flexible master; 6 is an electrodeposition tank; 7 is an arc-shaped metal layer; 8 is The seams between arc-shaped metal layers; 9 is a circular metal layer; 10 is a metal cylinder; 11 is a polymer material.

detailed description

(1) Take a flat substrate, process microstructures on the substrate, and make a planar template 1, as shown in Figure 1;

Preferably, the substrate has a certain strength and good processing performance, and the material is, for example, a nickel plate, a copper plate or an aluminum plate.

Preferably, the shape of the planar formwork 1 may be a rectangle.

(2) The material 2 with good adhesion resistance is poured on the flat template 1 by normal temperature injection molding process, and the flexible master plate 3 is produced; specifically, as shown in Figure 2, the material 2 with good adhesion resistance is used at room temperature The pouring method is to pour on the plane template 1 under vacuum condition, peel off the material 2 with good adhesion resistance from the plane template 1 after curing, and reproduce the flexible master 3 .

Preferably, the material 2 with good anti-adhesion property is PDMS or polytetrafluoroethylene.

(3) Bending and fixing the flex master 3 on the inner surface of a cylinder 4 to form a cylindrical flex master 5 with a certain curvature, as shown in Figure 4, conduct conductive treatment on the surface of the cylindrical flex master 5, as Figure 5 shows.

Preferably, the cylinder 4 acts as a fixed support and can be made of a material with a certain hardness, such as ABS engineering plastics, steel, aluminum or copper.

Preferably, the cylindrical flex master 5 has a certain radian, and the central angle is 360°/N, and N is preferably 3 in the present invention.

Preferably, the conductive treatment on the surface of the cylindrical flexible master 5 can be realized by the process of preparing a conductive film, such as electroless plating, evaporation, magnetron sputtering coating, or copper oil or graphite spraying process.

(4) Using the conductively treated cylindrical flexible master 5 as the cathode, electroforming in the electrodeposition tank 6, after a certain period of time, peeling off the arc-shaped metal layer 7 electroformed and deposited on the surface of the cylindrical flexible master 5, as shown in Figure 6 and Figure 7 show.

As preferably, the arc-shaped metal layer 7 deposited by electroforming on the cylindrical flexible master plate 5 forms a cylindrical mold surface after the subsequent processing is completed, and its material is a metal material with a certain hardness and good electrodeposition performance, such as nickel or aluminum.

Preferably, the arc-shaped metal layer 7 deposited by electroforming has a certain radian, and the central angle is 360°/N. In the present invention, the preferred central angle is 120°.

Preferably, the thickness of the arc-shaped metal layer 7 should have a certain strength and hardness, preferably 4-5mm in the present invention.

(5) Several arc-shaped metal layers 7 deposited by electroforming are spliced into circular metal layers, as shown in Figure 8; the joints 8 between adjacent metal layers are connected by a metal plate connection process to form a seamless Seam, a complete circular metal layer 9, as shown in Figure 9.

Preferably, the number of arc-shaped metal layers 7 deposited by electroforming is determined by their central angles, and is N, preferably three in the present invention, which can form a ring-shaped metal layer.

Preferably, the joining process of the seam 8 between adjacent arc-shaped metal layers 7 can be processed by metal plate joining process, such as resistance welding, laser welding, gas welding or brazing.

(6) Assemble the ring-shaped metal layer 9 on a metal cylinder 10 to keep the gap between the ring metal and the metal cylinder 10 at the center uniform. As shown in Figure 10, pour the liquid polymer material 11 into the circle In the gap between the annular metal layer 9 and the metal cylinder 10, after solidification, trim and make a cylindrical mold.

Preferably, the polymer material 11 is a polymer material with certain elasticity and viscosity, such as acrylate rubber and epoxy resin glue.

Preferably, the metal cylinder 10 is made of a material with certain strength and corrosion resistance, such as stainless steel.

Claims (9)

1. A manufacturing method of a cylindrical mold, characterized in that it comprises the following steps: (1) take a flat substrate, process a microstructure on the substrate, and make a planar template 1; (2) adopt normal temperature injection molding process in The material 2 with good anti-adhesion is poured on the plane template 1, and the flexible master 3 is produced; (3) The flexible master 3 is bent and fixed on the inner surface of a cylinder 4 to form a cylindrical flexible master with a certain curvature. version 5, conducting conductive treatment on the surface of the cylindrical flexible master 5; (4) using the conductive cylindrical flexible master 5 as the cathode, electroforming in the electrodeposition tank 6, and peeling off the cylindrical flexible master 5 after a certain period of time The arc-shaped metal layer 7 deposited by electroforming on the surface; (5) several arc-shaped metal layers 7 deposited by electroforming are spliced together to form a ring-shaped metal layer 9; the metal plate connecting process is used to connect adjacent metal layers The joint 8 between them forms a seamless and complete annular metal layer 9; (6) assemble the annular metal layer 9 on a metal cylinder 10 to keep the annular metal layer 9 and the metal at the center The gaps between the cylinders 10 are uniform, and the liquid polymer material 11 is poured and filled in the gap between the annular metal layer 9 and the metal cylinders 10 , and trimmed after solidification to make a cylinder mold. 2 . The method for manufacturing a cylindrical mold according to claim 1 , wherein the material 2 with good anti-adhesion property in step (2) is PDMS or polytetrafluoroethylene. 3. The manufacturing method of a cylindrical mold according to claim 1, characterized in that the surface conduction treatment described in step (3) can be realized by preparing a conductive film process, such as electroless plating, evaporation, magnetron sputtering Coating, or spraying copper oil, graphite process. 4. The manufacturing method of a cylindrical mold according to claim 1, characterized in that the arc-shaped metal layer 7 deposited by electroforming in step (4) has a certain radian, and the central angle is 360˚/N. 5. The manufacturing method of a cylindrical mold according to claim 1, characterized in that, the number of 7 arc-shaped metal layers in step (4) is determined by its central angle, which is N, and can jointly form a Ring metal layer. 6 . The manufacturing method of a cylindrical mold according to claim 1 , wherein the arc-shaped metal layer 7 in step (4) is a metal thin film with a thickness of 4-5 mm. 6 . 7. The manufacturing method of a cylindrical mold according to claim 1, characterized in that the joining process of the joint 8 between the adjacent arc-shaped metal layers 7 described in step (5) can be joined by metal plates processes such as resistance welding, laser welding, gas welding or brazing. 8. The manufacturing method of a cylindrical mold according to claim 1, wherein the liquid polymer material in step (6) is acrylate rubber or epoxy resin glue. 9. The manufacturing method of a cylindrical mold according to claim 1, wherein the metal cylinder 10 in step (6) is made of a material with certain strength and corrosion resistance, such as stainless steel.