Ultrasonic vibration-assisted mould pressing forming method based on tin liquid medium and special forming device thereof

An ultrasonic vibration, auxiliary mold technology, applied in glass forming, glass pressing, glass manufacturing equipment, etc., can solve the problems of difficult to fill the mold, inconsistent filling rate, low filling rate, etc., to improve fluidity and uniformity, The effect of improving the filling rate inconsistency and improving the filling performance

Inactive Publication Date: 2016-03-02
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using methods including the above-mentioned processes to make thin glass components with microstructures, the currently widely used molding method is generally a single linear motion of the lower mold (or upper mold), and the mold directly compresses the deformation of the glass preform to complete the filling process. It is difficult for the preform to fill the mold with a microstructure forming cavity during the compression molding process, and there are problems of low filling rate and inconsistent filling rate
Although the filling rate can be improved by ultrasonic-assisted methods, since the mold directly acts on the glass preform, the stress concentration and uneven distribution of the glass components are caused, especially when molding thin glass components, microcracks are prone to appear on the surface of the finished product during the annealing process , and even rupture
In addition, the large residual stress causes the formed product to be easily deformed after a long period of storage, which will also affect its optical properties

Method used

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  • Ultrasonic vibration-assisted mould pressing forming method based on tin liquid medium and special forming device thereof
  • Ultrasonic vibration-assisted mould pressing forming method based on tin liquid medium and special forming device thereof
  • Ultrasonic vibration-assisted mould pressing forming method based on tin liquid medium and special forming device thereof

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Embodiment 1

[0028] Embodiment 1: The implementation process of the present invention includes heating, clamping, auxiliary molding based on tin liquid medium ultrasonic vibration, holding pressure and annealing, cooling and taking out operations such as shaped products, refer to Figure 1 to Figure 6 . The specific steps are as follows:

[0029] Step one, heating. use as figure 2 The microstructured thin glass element shown is based on the ultrasonic vibration assisted molding device of liquid tin medium. Enough metal tin is put into a U-shaped groove with similar opening diameters at both ends, and nitrogen gas is introduced to drive away the oxygen in the U-shaped groove. , The tin liquid exposed at the left end of the U-shaped groove needs an oxygen-free environment to prevent the tin liquid from being oxidized. In addition, the entire molding process is under anaerobic conditions. In an environment filled with nitrogen, oxygen in the air is prevented from oxidizing the mold. At th...

Embodiment 2

[0034] Example 2: Reference Figure 1 to Figure 6 . to use as figure 2 The shown forming device produces micro-cylindrical array lens as an example, and describes the technological process of the present invention in detail:

[0035] Step 1. Use such as figure 2 The micro-structured thin glass element shown is based on the ultrasonic vibration-assisted molding device of liquid tin medium. Sufficient metal tin with a melting point of 231.89°C is put into a U-shaped groove 5 with openings at both ends having similar diameters. The material of the U-shaped groove 5 is Stainless steel. Nitrogen gas is introduced to drive away the oxygen in the U-shaped groove 5. The tin liquid 6 exposed at the left end of the U-shaped groove 5 requires an oxygen-free environment to prevent the tin liquid 6 from being oxidized. And the entire molding process requires an oxygen-free state. In an environment filled with nitrogen, oxygen in the air can be prevented from oxidizing the mold 1. At ...

Embodiment 3

[0040] Example 3: Reference Figure 1 to Figure 6 . to use as figure 2 The shown forming device is used as an example to manufacture a Fresnel lens, and the process method of the present invention is described in detail.

[0041] Step 1. Use such as figure 2 The micro-structured thin glass element shown is based on the ultrasonic vibration assisted molding device of liquid tin medium. Sufficient metal tin with a melting point of 231.89°C is put into a U-shaped groove 5 with openings at both ends having similar diameters. The material of the U-shaped groove 5 is Stainless steel. Nitrogen gas is introduced to drive away the oxygen in the U-shaped groove 5. The tin liquid 6 exposed at the left end of the U-shaped groove 5 requires an oxygen-free environment to prevent the tin liquid 6 from being oxidized. Moreover, the entire compression molding process requires an oxygen-free state. In an environment filled with nitrogen, oxygen in the air is prevented from oxidizing the m...

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Abstract

The invention discloses an ultrasonic vibration-assisted mould pressing forming method based on a tin liquid medium and a special forming device thereof, and mainly aims at solving the technical problems that an existing mould pressing forming is low and inconsistent in filling ratio and the like. According to the technical scheme, the tin liquid medium which is better in heat conducting property is introduced between a heating plate and a preformed glass body, the pressure of a piston is transmitted to the surface of the preformed glass body through the tin liquid medium, and then glass in a molten state is driven to be evenly filled in a mould which is installed at one port of a tin liquid container, wherein the forming surface of the mould is arranged to be in a microstructural shape; an ultrasonic vibration assistant system is installed over a piston of the other port of the tin liquid container and can apply assistant vibration with the certain frequency and the controllable amplitude to the piston, and ultrasonic vibration of the piston is transmitted to the preformed glass body through the tin liquid medium. Accordingly, the filling ratio of the glass in the molten ratio is increased, and then high-precision mould pressing forming of microstructural thin glass elements is achieved.

Description

technical field [0001] The invention belongs to the technical field of molding of thin glass elements with microstructures, and in particular relates to a molding method and production equipment assisted by ultrasonic vibration, auxiliary heating of high-temperature liquid tin, and auxiliary molding of high-pressure liquid. Background technique [0002] The use of compression molding to manufacture glass components is an advanced manufacturing technique that can increase productivity and meet market requirements for mass production. Glass molding belongs to thermoforming technology, which is an efficient processing method that uses high-precision molds to compress and deform the glass preform under high temperature and oxygen-free conditions, and directly replicates the shape of the mold core. The filling rate of the glass preform, the temperature and stress distribution inside the glass directly affect the forming quality of the lens during the molding process of the glass....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B11/08C03B11/16
CPCC03B11/082C03B11/084C03B11/16
Inventor 朱科军尹韶辉张高峰余建武龙朝辉陈逢军何源
Owner XIANGTAN UNIV
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