Equipment for inner overflow and outer overflow down-draw molding of glass pipe, and design method thereof

A glass tube and equipment technology, which is used in the field of equipment for down-draw forming glass tubes with internal and external overflows

Active Publication Date: 2019-09-20
CDGM OPTICAL GLASS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The invention provides a kind of equipment for down-drawing glass tubes with internal and external overflow, aiming to solve the problem of how to make glass tubes with excellent surface quality and small thickness deviation

Method used

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  • Equipment for inner overflow and outer overflow down-draw molding of glass pipe, and design method thereof
  • Equipment for inner overflow and outer overflow down-draw molding of glass pipe, and design method thereof
  • Equipment for inner overflow and outer overflow down-draw molding of glass pipe, and design method thereof

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Experimental program
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Embodiment

[0124] See Table 1 and Table 2 for the dimensional parameters and physical simulation test parameters of a glass tube with internal and external overflow down-drawing. The viscosity of glass molding is simulated with high-viscosity silicone oil. The experimental results are shown in Table 3. The glass tube diameter of the glass tube that this equipment is used to make is 3.6598cm, and the tube thickness is 0.2cm; the shrinkage ratio of the tube diameter is D 3 D. 4 is 3.35.

[0125] Table 1: Design data of simulation experiments for 100 parts of the inner overflow device

[0126]

[0127] Table 2: The design data of the simulation experiment carried out on part 200 of the overflow device

[0128]

[0129] Table 3: The thickness σ of the silicone oil just leaving the overflow pan 300 in the simulation experiment 3 Test data with thickness deviation

[0130]

[0131] Analysis of test results:

[0132] The maximum value of the thickness deviation is 3.69%, the minim...

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Abstract

The invention belongs to the technical field of glass pipe manufacturing, and particularly discloses equipment for inner overflow and outer overflow down-draw molding of a glass pipe, and a design method thereof. A purpose of the present invention is to solve the problem of how to produce a glass pipe with excellent surface quality and small thickness deviation. The equipment comprises an inner overflow device and an outer overflow device, wherein the inner overflow device comprises a first annular material supply barrel, a cylindrical core part and an inner overflow disc, and the outer overflow device comprises a second annular material supply barrel, a cylindrical core part and an outer overflow disc. According to the present invention, the flow rate of the glass liquid outflowing from the outlet can be uniformly distributed through the first narrow channel formed in the inner overflow device, the overflow is performed by using the inner overflow disc, the flow rate of the glass liquid outflowing from the outlet can be uniformly distributed through the second narrow channel formed in the outer overflow device, and the glass liquid is subjected to overflow by using the outer overflow disc, such that the good surface characteristic is formed so as to mold the glass pipe with excellent inner and outer surface quality and small thickness deviation.

Description

technical field [0001] The invention belongs to the technical field of glass tube manufacturing, and in particular relates to equipment and a design method for down-drawing forming glass tubes with internal and external overflow. Background technique [0002] With the continuous advancement of science and technology and increasing innovation, the demand for high-quality optical glass tubes is also increasing, such as: optical fiber leather tubes, etc. At present, the production of optical fiber leather tubes usually undergoes cold processing after secondary drawing to meet the requirements of uniform thickness and good straightness of the glass tube; The rate is low, and the processing cost of cold processing is very high. Therefore, how to improve product quality, material utilization rate and reduce production cost is a key problem in the production of high-quality optical glass tubes. Contents of the invention [0003] The invention provides a device for forming a gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B17/04G06F17/50
CPCC03B17/04G06F2119/18G06F2113/22G06F30/20
Inventor 卢世峯王乃帅王培新粟勇
Owner CDGM OPTICAL GLASS
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