Jacket type glass piston preparation process

Abstract

The invention relates to a preparation technique for jacket-type glass piston. Wherein, using the blown piston-core shell as the jacket inner layer, fused sealing the broken small end with a glass tube; connecting a glass tube on the shell opening as a inner branch tube, blasting one end of glass tube and the large end into a glass ball; cutting part of the ball on blaze to cover a glass tube as the jacket outer layer; connecting and fused sealing two ends and the necked glass balls on ends of inner layer; connecting a out branch tube on outer glass tube; lengthening the inner branch tube; annealing and grinding the piston inner core and shell. This invention improves precision and reduces cost.

Description

technical field

[0001] The invention relates to a preparation process of a glass piston, in particular to a preparation process of a jacket type glass piston. Background technique

[0002] In the preparation of various glass instruments, the glass piston is used as a general-purpose accessory. But its shell of existing glass piston is all single-layer, because there is capillary action between piston core and shell, the various glass instruments that utilize this common piston to prepare can't be directly placed in the constant temperature of liquid constant temperature medium.

[0003] Before the present invention, it is usually adopted to place the whole instrument under test in a constant temperature chamber to achieve the purpose of temperature control, and some even directly conduct experiments at room temperature, such as U-shaped electrophoresis tubes, which are often used to study the electrophoresis phenomenon of colloids. . However, due to the two glass pistons i...

Examples

Embodiment Construction

[0026] like figure 1 Shown, the steps of its preparation process are as follows:

[0027] First, blow the piston shell with a nipper as the inner layer of the jacket, as shown in (a);

[0028] Second, after the small head is blown out, a glass tube is externally connected and melted, as shown in (b);

[0029] Third, open an opening on both sides of the shell, and then connect two glass tubes of equal length vertically as the inner branch pipes. The distance between the ports of the two inner branch pipes should be slightly smaller than the inner diameter of the outer glass tube of the piston jacket. Plug the two pipes tightly, as shown in (b);

[0030] Its four, one end of the glass tube that melts and seals is blown into a glass ball, as shown in (c);

[0031] Fifth, the big head is also blown into a glass ball, as shown in (d);

[0032] Sixth, cut off a part of the glass balls at both ends on the flame, and put on a glass tube of moderate length as the outer layer of the...

technical field

[0001] The invention relates to a preparation process of a glass piston, in particular to a preparation process of a jacket type glass piston. Background technique

[0002] In the preparation of various glass instruments, the glass piston is used as a general-purpose accessory. But its shell of existing glass piston is all single-layer, because there is capillary action between piston core and shell, the various glass instruments that utilize this common piston to prepare can't be directly placed in the constant temperature of liquid constant temperature medium.

[0003] Before the present invention, it is usually adopted to place the whole instrument under test in a constant temperature chamber to achieve the purpose of temperature control, and some even directly conduct experiments at room temperature, such as U-shaped electrophoresis tubes, which are often used to study the electrophoresis phenomenon of colloids. . However, due to the two glass pistons i...

Examples

Embodiment Construction

[0026] like figure 1 Shown, the steps of its preparation process are as follows:

[0027] First, blow the piston shell with a nipper as the inner layer of the jacket, as shown in (a);

[0028] Second, after the small head is blown out, a glass tube is externally connected and melted, as shown in (b);

[0029] Third, open an opening on both sides of the shell, and then connect two glass tubes of equal length vertically as the inner branch pipes. The distance between the ports of the two inner branch pipes should be slightly smaller than the inner diameter of the outer glass tube of the piston jacket. Plug the two pipes tightly, as shown in (b);

[0030] Its four, one end of the glass tube that melts and seals is blown into a glass ball, as shown in (c);

[0031] Fifth, the big head is also blown into a glass ball, as shown in (d);

[0032] Sixth, cut off a part of the glass balls at both ends on the flame, and put on a glass tube of moderate length as the outer layer of the...

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