阅读说明：本技术 一种聚合物超声辅助线性摩擦压印装置及方法 (Polymer ultrasonic-assisted linear friction imprinting device and method ) 是由 张督 崔良玉 田延岭 于 2021-08-19 设计创作，主要内容包括：本发明公开一种聚合物超声辅助线性摩擦压印装置及方法,压印装置包括压印平台、超声换能器、变幅杆、摩擦压印模具、聚合物薄板、X轴定位平台、Y轴定位平台和Z轴定位平台,所述压印平台的一侧设置有立柱,所述立柱的内侧通过Z轴定位平台连接有支架,所述支架上固定有所述超声换能器,所述超声换能器上设置有变幅杆,所述变幅杆的末端夹持有摩擦压印模具,所述摩擦压印模具的下方从上到下依次设置有聚合物薄板、吸盘、X轴运动平台和Y轴运动平台。本发明可以快速高效不产生切屑,加工过程中模具对聚合物压力小,损伤小、不会产生翘曲等,可通过替换模块微杆实现不同深度、宽度的微沟槽的加工。可用于加工复杂结构的微流控芯片等聚合物器件。(The invention discloses a polymer ultrasonic-assisted linear friction imprinting device and a method, wherein the imprinting device comprises an imprinting platform, an ultrasonic transducer, an amplitude transformer, a friction imprinting mold, a polymer sheet, an X-axis positioning platform, a Y-axis positioning platform and a Z-axis positioning platform, wherein one side of the imprinting platform is provided with an upright post, the inner side of the upright post is connected with a support through the Z-axis positioning platform, the ultrasonic transducer is fixed on the support, the amplitude transformer is arranged on the ultrasonic transducer, the friction imprinting mold is clamped at the tail end of the amplitude transformer, and the polymer sheet, a sucker, an X-axis motion platform and the Y-axis motion platform are sequentially arranged below the friction imprinting mold from top to bottom. The invention can quickly and efficiently generate no cutting scraps, has small pressure and damage to the polymer by the die in the processing process, does not generate warping and the like, and can realize the processing of micro grooves with different depths and widths by replacing the micro rods of the module. Can be used for processing polymer devices such as microfluidic chips with complex structures and the like.)

1. The polymer ultrasonic-assisted linear friction imprinting device is characterized by comprising an imprinting platform, an ultrasonic transducer, an amplitude transformer, a friction imprinting mold, a polymer sheet, an X-axis positioning platform, a Y-axis positioning platform and a Z-axis positioning platform, wherein an upright post is arranged on one side of the imprinting platform, the inner side of the upright post is connected with a support through the Z-axis positioning platform, the ultrasonic transducer is fixed on the support, the amplitude transformer is arranged on the ultrasonic transducer, the friction imprinting mold is clamped at the tail end of the amplitude transformer, and the polymer sheet, a sucker, an X-axis moving platform and the Y-axis moving platform are sequentially arranged below the friction imprinting mold from top to bottom.

2. The apparatus of claim 1, wherein the friction imprinting mold is disposed perpendicular to the polymer sheet.

3. A polymer ultrasonic-assisted linear friction imprinting process is based on the polymer ultrasonic-assisted linear friction imprinting device in claim 1, and is characterized in that electric energy is converted into ultrasonic vibration mechanical energy through an ultrasonic transducer, and amplitude amplification adjustment is realized through an amplitude transformer; the tail end of the amplitude transformer drives the friction imprinting mould to generate linear ultrasonic vibration along the axial direction of the amplitude transformer, so that the linear ultrasonic vibration causes linear friction between the tail end of the friction imprinting mould and the surface of a polymer; locally melt-deforming a polymer in heat-generating contact with the friction imprint mold within milliseconds by ultrasonic linear frictional heat generation; and the molten polymer is filled into the cavity of the friction imprinting mold under the pressure action of the Z-axis motion platform, and after the tail end of the friction imprinting mold leaves the surface of the molten polymer, the polymer forced to be filled into the cavity of the friction imprinting mold is solidified when meeting the condensation within milliseconds, so that the structure on the friction imprinting mold is copied.

4. A polymer ultrasonic-assisted linear friction imprinting control method based on the polymer ultrasonic-assisted linear friction imprinting device of claim 1, which is characterized by comprising the following steps:

(1) fixing a polymer sheet to be processed on a sucking disc;

(2) controlling the X-axis positioning platform and the Y-axis positioning platform to enable the polymer sheet to be processed to be located right below the friction imprinting mold;

(3) in the processing process, pressure and height control in the vertical direction is realized through a Z-axis positioning platform, and a processing track is controlled through an X-axis positioning platform and a Y-axis positioning platform, so that the speed directions of the X-axis positioning platform and the Y-axis positioning platform are always consistent with the vibration and friction direction of a friction impression mold; finally, linear friction imprinting of the polymer is completed.

Technical Field

The invention relates to the field of polymer surface imprinting and forming, in particular to a polymer ultrasonic-assisted linear friction imprinting device and a polymer ultrasonic-assisted linear friction imprinting method.

Background

The traditional ultrasonic auxiliary imprinting adopts a commercial ultrasonic welding machine, and because the vibration direction and the pressure of the ultrasonic welding machine are vertical to the plane of a device during vibration, the pressure and the vibration direction are in the same direction, the friction heat generation efficiency is low, and the imprinting efficiency is low and the energy consumption is high; the coupling action of pressure and vibration can cause damage to the device in the thickness direction; the traditional ultrasonic imprinting is large-area integral imprinting, and repeated overprinting and microstructure correction are difficult to realize.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a forming process, a device and a control method for stamping and processing a micro-groove structure on the surface of a polymer.

The purpose of the invention is realized by the following technical scheme:

the polymer ultrasonic-assisted linear friction imprinting device comprises an imprinting platform, an ultrasonic transducer, an amplitude transformer, a friction imprinting mold, a polymer sheet, an X-axis positioning platform, a Y-axis positioning platform and a Z-axis positioning platform, wherein an upright post is arranged on one side of the imprinting platform, the inner side of the upright post is connected with a support through the Z-axis positioning platform, the ultrasonic transducer is fixed on the support, the amplitude transformer is arranged on the ultrasonic transducer, the friction imprinting mold is clamped at the tail end of the amplitude transformer, and the polymer sheet, a sucker, an X-axis motion platform and the Y-axis motion platform are sequentially arranged below the friction imprinting mold from top to bottom.

Further, the friction stamping die is arranged perpendicular to the polymer sheet.

The invention also provides a polymer ultrasonic-assisted linear friction imprinting process, wherein the electric energy is converted into ultrasonic vibration mechanical energy through an ultrasonic transducer, and the amplitude is amplified and adjusted through an amplitude transformer; the tail end of the amplitude transformer drives the friction imprinting mould to generate linear ultrasonic vibration along the axial direction of the amplitude transformer, so that the linear ultrasonic vibration causes linear friction between the tail end of the friction imprinting mould and the surface of a polymer; locally melt-deforming a polymer in heat-generating contact with the friction imprint mold within milliseconds by ultrasonic linear frictional heat generation; and the molten polymer is filled into the cavity of the friction imprinting mold under the pressure action of the Z-axis motion platform, and after the tail end of the friction imprinting mold leaves the surface of the molten polymer, the polymer forced to be filled into the cavity of the friction imprinting mold is solidified when meeting the condensation within milliseconds, so that the structure on the friction imprinting mold is copied.

The invention also provides a polymer ultrasonic-assisted linear friction imprinting control method, which comprises the following steps:

(1) fixing a polymer sheet to be processed on a sucking disc;

(2) controlling the X-axis positioning platform and the Y-axis positioning platform to enable the polymer sheet to be processed to be located right below the friction imprinting mold;

(3) in the processing process, pressure and height control in the vertical direction is realized through a Z-axis positioning platform, and a processing track is controlled through an X-axis positioning platform and a Y-axis positioning platform, so that the speed directions of the X-axis positioning platform and the Y-axis positioning platform are always consistent with the vibration and friction direction of a friction impression mold; finally, linear friction imprinting of the polymer is completed.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. the ultrasonic-assisted linear friction imprinting technology is adopted, the pressure direction and the vibration direction are decoupled, the friction heating efficiency is high, the depth direction is easy to control, micro-structure imprinting can be realized on the large-amplitude surface by adopting a micro-mold, and the flexible processing of a complex structure is realized by controlling the motion track through a numerical control system; the flexible processing of a complex structure is realized by adopting the miniature die, the processing of a large die can be avoided, and the die cost is reduced.

2. The invention is a thermoplastic forming method by local heating, which is fast and efficient without generating cutting scraps, has small pressure of a die on a polymer in the processing process, small damage, no warping and the like, and can realize the processing of micro grooves with different depths and widths by replacing module micro rods. Can be used for processing polymer devices such as microfluidic chips with complex structures and the like.

Drawings

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

Fig. 2a and 2b are schematic structural views of male die stamping and female die stamping, respectively.

Fig. 3a and 3b are schematic views of the structure of a terrace die and a concave die replicated microchannel, respectively.

Reference numerals: 1-upright column, 2-Z axis motion platform, 3-support, 4-ultrasonic transducer, 5-friction imprinting mould, 6-polymer sheet, 7-sucker, 8-X axis motion platform, 9-Y axis motion platform and 10-imprinting platform

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the invention provides a polymer ultrasonic-assisted linear friction imprinting device, which comprises an imprinting platform 10, an ultrasonic transducer 4, an amplitude transformer, a friction imprinting mold 5, a polymer sheet 6, an X-axis positioning platform 8, a Y-axis positioning platform 9 and a Z-axis positioning platform 2, wherein an upright post 1 is installed on one side of the imprinting platform 10, the inner side of the upright post 1 is connected with a support 3 through the Z-axis positioning platform 2, the ultrasonic transducer 4 is fixed on the support 3, the amplitude transformer is arranged on the ultrasonic transducer 4, the friction imprinting mold 5 is clamped at the tail end of the amplitude transformer, and the polymer sheet 6, a suction cup 7, the X-axis movement platform 8 and the Y-axis movement platform 9 are sequentially arranged below the friction imprinting mold 5 from top to bottom.

In the embodiment, the friction imprinting mold is fixed at the tail end of the amplitude transformer through the bolt connection, and can be replaced conveniently. The friction imprint mold has a flat plate at the end for smoothing out the molten polymer extruded during the imprint process, and the microstructure of the friction imprint mold can be achieved by laser machining or etching. Furthermore, the friction embossing die is arranged perpendicular to the polymer sheet.

Specifically, the polymer ultrasonic-assisted linear friction imprinting process comprises the following steps of converting electric energy into ultrasonic vibration mechanical energy through an ultrasonic transducer, and amplifying and adjusting the amplitude through an amplitude transformer. The tail end of the amplitude transformer is clamped with a friction imprinting mould which is vertical to a plane to be processed, the tail end of the amplitude transformer drives the friction imprinting mould to generate linear ultrasonic vibration along the axial direction of the amplitude transformer through the design of the amplitude transformer, so that the linear ultrasonic vibration causes linear friction between the end of the friction imprinting mold and the surface of the polymer, the polymer in thermal contact with the friction imprinting mould is rapidly and locally melted and deformed within milliseconds by high-frequency ultrasonic linear friction heat generation, the melted polymer is filled into the cavity of the friction imprinting mould by the pressure action of a Z-axis motion platform, because the X, Y axle moving platform moves according to the designed track, after the friction stamping mould end leaves the surface of the polymer melted, the polymer forced to fill the cavity of the friction imprint mold rapidly solidifies upon condensation within milliseconds, replicating the structure on the friction imprint mold. The friction-imprint mold may employ a male mold or a female mold, as shown in fig. 2a and 2 b. The structure of the male replicated microchannel is shown in fig. 3a, and the structure of the female replicated microchannel is shown in fig. 3 b.

Specifically, the polymer ultrasonic-assisted linear friction imprinting control method comprises the following steps:

(1) fixing a polymer sheet to be processed on a sucking disc;

(2) controlling the X-axis positioning platform and the Y-axis positioning platform to enable the polymer sheet to be processed to be located right below the friction imprinting mold;

(3) in the processing process, pressure and height control in the vertical direction is realized through a Z-axis positioning platform, and a processing track is controlled through an X-axis positioning platform and a Y-axis positioning platform, so that the speed directions of the X-axis positioning platform and the Y-axis positioning platform are always consistent with the vibration and friction direction of a friction impression mold; finally, linear friction imprinting of the polymer is completed.

In addition, the microstructure can be processed on the curved surface by controlling the motion trail of an XZ axis or a YZ axis.

The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.