Glass perform floating shaping device

Abstract

The invention relates to a glass preform flowing-up building motion, which can be connected with one pneumatic supply to form a glass perform body. The building motion comprises a forming seat and a combination seat, and the forming seat is provided with a forming wall and a plurality of first forming holes formed on the forming wall, and the forming wall has a forming surface and an installationsurface opposite to the forming surface. The first forming holes are extended to the installation surface from the forming surface, and the combination seat is positioned on the installation surface and provided with a plurality of second forming air holes respectively communicated with the first forming air holes.

Description

technical field The invention relates to a forming device, in particular to a glass preform floating forming device which can control the amount of gas ejection in different regions. Background technique As shown in Figure 1, it is an existing floating forming device (Japanese Patent Laid-Open No. 2002-201030) for forming glass preforms (preform), which includes a forming seat 1, which can be used with a supply The air pressure source (not shown) of gas is connected, and the forming seat 1 has an arc-shaped forming surface 101, a plane-shaped air inlet surface 102 opposite to the forming surface 101, and a plurality of channels from the forming surface 101. The forming air holes 103 extending to the air inlet surface 102 are concentrically arranged on the forming surface 101 , and the length of the forming air holes 103 is gradually shortened from the outermost periphery to the center. Thereby, when a platinum outflow tube (not shown) drops a molten glass (not shown) on the...

AI Technical Summary

Problems solved by technology

1. The hole length of the forming air hole 103 is completely determined by the curved surface shape of the forming surface 101, and cannot be changed arbitrarily. Therefore, the forming seat 1 cannot be adjusted by changing the hole length of the forming air hole 103. Fine-tuning the amount of gas ejected in different areas of the forming surface 101, so that the forming seat 1 can only be used to form a glass preform 2 of a certain shape, but cannot be used to produce a variety of glass preforms 2

2. When making other glass preforms with different curved surface curvatures, the forming seat 1 must correct the curved surface shape of the forming surface 101 to change the gas ejection volume of the forming air holes 103 located in different regions. In this way, Not only troublesome, but quite inconvenient

3. Since the forming surface 101 is a concave arc surface, and the air intake surface is planar, the length of the outermost forming air holes 103 will naturally be larger than the forming air holes 103 in other areas, resulting in the outermost The gas ejection volume of the forming air holes 103 is bound to be smaller than that of the forming air holes 103 in other regions, so that sufficient airflow cannot be generated to limit the glass preform 2 to the central position. 2, the glass preform 2 may easily touch the molding surface 101 due to shaking, and become a defective product

Since the curvatures of the forming surface 301 and the air inlet surface 302 correspond to each other, the lengths of all the forming air holes 303 are nearly equal in length. In this way, although the forming surface 301 can produce uniform gas ejection in different regions However, the forming seat 3 must be bothered to process the forming surface 301 and the air intake surface 302 into arcuate shapes. In addition, the forming seat 3 cannot be adjusted by changing the length of the forming air hole 303. Fine-tuning controls the amount of gas ejected in different areas of the forming surface 301, therefore, the forming seat 3 will also have the above-mentioned first and second points missing

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