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Device for preparing glass tube and preparation method for device

A technology for preparing a device and a glass tube, which is applied in glass pressing, glass manufacturing equipment, glass forming, etc., can solve the problems of dimensional accuracy affecting secondary drawing accuracy, secondary drawing application and promotion restrictions, etc., and achieve economical savings. Energy and investment costs, the effect of maintaining squeeze and draw, avoiding investment

Active Publication Date: 2018-12-11
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the apparent quality (such as air bubbles, stripes and verticality, etc.) and dimensional accuracy of prefabricated tubes greatly affect the accuracy of secondary drawing, the application and promotion of secondary drawing technology is limited

Method used

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  • Device for preparing glass tube and preparation method for device
  • Device for preparing glass tube and preparation method for device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] figure 1 is a structural schematic diagram of an embodiment of the glass preparation device of the present invention, such as figure 1 As shown, the glass tube preparation device provided by the embodiment of the present invention includes: a forming mechanism and an extrusion mechanism, wherein,

[0050] The forming mechanism includes an upper mold 2, a lower mold 7 and a heating furnace;

[0051] figure 2 It is a structural schematic diagram of a lower mold of a glass preparation device provided in an embodiment of the present invention, as figure 2 As shown, the lower mold 7 includes a cylindrical cavity of the upper section and an inverted conical cavity of the lower section; the cylindrical cavity communicates with the inverted conical cavity; the inverted conical cavity is provided with an opening 18 at the tip of the cone .

[0052] Forming part 9 is arranged in the inverted conical cavity of lower mold 7, and forming part 9 is used for the shaping of glass...

Embodiment 1

[0105] The present embodiment provides a kind of preparation method of glass tube, adopts such as figure 1 The preparation device of shown glass tube, it comprises the steps:

[0106] (1) Production of glass preforms:

[0107] Select glass raw materials, by weight percentage, include the following components: SiO 2 : 80.6%, B 2 o 3 : 13%, Al 2 o 3 : 2%, Na 2 O: 3.5%, K 2 O: 0.5% and Sb 2 o 3 : 0.4%; make the glass raw material into a glass preform rod with a size of Φ120mm, and the glass preform rod has no defects such as bubbles, streaks and stones;

[0108] (2) Heat treatment of the glass preform: put the above glass preform into the heating furnace body for heat treatment to soften the glass preform; ℃; the temperature of the middle section is 840±1℃; the temperature of the lower section is 520℃;

[0109] (3) Extrusion forming: the softened glass preform is extruded and formed, the extrusion force is 80MPa, the extrusion rate is 0.2mm / min, and the drawing rate is 1...

Embodiment 2

[0112] The present embodiment provides a kind of preparation method of glass tube, adopts such as figure 1 The preparation device of shown glass tube, it comprises the steps:

[0113] (1) making of glass preform: same as embodiment 1;

[0114] (2) Heat treatment of the glass preform: put the above glass preform into the heating furnace body for heat treatment to soften the glass preform; ℃; the temperature of the middle section is 850±1℃; the temperature of the lower section is 480℃;

[0115] (3) Extrusion forming: the softened glass preform is extruded and formed, the extrusion force is 150MPa, the extrusion rate is 0.1m / min, and the drawing rate is 22.2mm / min to obtain a glass tube with an outer diameter Φ 外 =9mm, inner diameter Φ 内 = 4 mm.

[0116] The apparent quality inspection of the glass tube prepared in this example shows that the glass tube has an outer diameter deviation of ±0.05 mm and an inner diameter deviation of ±0.05 mm, which has the advantages of high r...

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Abstract

The invention relates to a device for preparing a glass tube and a preparation method for the device. The device comprises a molding mechanism, an extruding mechanism and a drawing mechanism, whereinthe molding mechanism comprises an upper mold, a lower mold and a heating furnace; the upper mold is adapted to a columnar cavity of the lower mold, and a molding part is arranged in the lower mold and is used for molding the glass tube. The device further comprises a feedback link mechanism which is used for controlling the extruding mechanism and the drawing mechanism so as to achieve the feedback linkage of extruding rate and drawing rate. The preparation method comprises the steps of firstly, subjecting materials to heat treatment so as to soften the materials, then, carrying out extruding, carrying out annealing, and then, carrying out drawing, thereby obtaining the glass tube. The glass tube prepared by the method has the advantages of high dimensional precision, high roundness and good linearity and has the outer diameter variation of + / -0.05mm and the inner diameter variation of + / -0.05mm; through replacing a mold, glass tubes, glass sticks and the like of different sizes and shapes can be extruded and drawn.

Description

technical field [0001] The invention relates to the technical field of glass tube preparation, in particular to a glass tube preparation device and a preparation method thereof. Background technique [0002] Glass tubes have attracted much attention due to their unique structure and performance, and are widely used, such as solar collector tubes, condenser tubes, glass tube instruments, and encapsulated fine tubes. At present, there are mainly two types of glass tube preparation technologies, direct forming and secondary drawing forming. Among them, direct forming is to directly draw glass tubes of different sizes from the glass melt by using mechanical tube drawing technology. This technology is mainly used for drawing large-diameter, axisymmetric glass tubes, and it is easy to realize engineering, but there is a problem with the dimensional accuracy of the product. Low cost, complex process, large equipment investment and other problems. Secondary drawing forming is base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B11/00C03B11/10C03B19/00
CPCC03B11/00C03B11/10C03B19/00
Inventor 王衍行祖成奎许晓典张超何坤赵慧峰
Owner CHINA BUILDING MATERIALS ACAD
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