JPH04367543A - Glass tube sealing device - Google Patents

Abstract

PURPOSE:To always mold glass tubes into a fixed shape and to seal an element by setting infrared lamps arranged opposingly by sandwiching a glass tube in between and irradiating the glass tube with infrared rays to seal the glass tube. CONSTITUTION:A glass tube sealing device is equipped with infrared lamps 4 arranged at equal intervals by sandwiching a glass tube 2, into which a lead piece 1 is inserted, in between and the infrared lamps 4 and electric sources 5 to light the infrared lamps 5. The lead piece 1 and the glass tube 2, materials to be heated, are irradiated with infrared rays condensed by the infrared lamps 4. By arranging the infrared lamps 4 opposingly by sandwiching the glass tube 2 in between in this way, energy density distribution of infrared rays is uniformized so that molten glass is made even and the shape of glass tube 2 is made constant.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass tube sealing device for sealing elements such as reed switches and wet switches into glass tubes.

0002

2. Description of the Related Art Generally, in the manufacture of reed switches and wet switches, an element serving as a contact member is sealed in a glass tube and assembled. Enclosing the glass tube determines the life of the switch, so it was an important process.

FIG. 2 is a diagram showing an outline of a conventional glass tube sealing device. Conventionally, this type of glass tube sealing device has, for example, as shown in FIG. It had a power supply section 5 for lighting the infrared lamp 4.

[0004] Also, using this glass tube sealing device,
When enclosing a reed switch in a glass tube, first, the glass tube 2 is fed into the reed piece 1 and held in a fixed position. Next, the infrared lamp 4 is turned on by the power supply section 5. As a result, heat rays are emitted from the infrared lamp 4. The emitted infrared rays pass through the glass tube 2, are reflected by the reflector 3, melt the lead piece 1 and the upper part of the glass tube 2,
The lead piece 1 and the glass tube are sealed.

[0005]

[Problems to be Solved by the Invention] The conventional glass tube sealing device described above requires skill in focusing the reflecting mirror, which affects the working conditions, and also cannot arbitrarily adjust the amount of infrared rays. , it was difficult to uniformly heat the glass tube. For this reason, the shape of the glass tube after encapsulation is not constant, causing defects due to the shape, resulting in a problem of lowering yield.

SUMMARY OF THE INVENTION An object of the present invention is to provide a glass tube sealing device that solves this problem and always forms a glass tube in a constant shape and encapsulates an element.

[0007]

[Means for Solving the Problems] A glass tube sealing device of the present invention is a glass tube sealing device in which a pair of lead pieces are inserted into a glass tube and sealed, and the glass tubes are sandwiched and placed facing each other. The glass tube is characterized in that it is equipped with an infrared lamp arranged to irradiate the glass tube with infrared rays and seal it.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram schematically showing a glass tube sealing apparatus according to an embodiment of the present invention. As shown in FIG. 1, this glass tube sealing device includes infrared lamps 4 arranged at equal intervals between glass tubes 2 into which lead pieces 1 are inserted, and a power source 5 for lighting these infrared lamps 4. This is because we have established the following. Further, the focused infrared rays of the infrared lamp 4 are arranged to irradiate the lead piece 1 and the glass tube 2, which are the objects to be heated.

In this way, by placing the infrared lamp 4 between and facing the glass tube 2, and by making the energy density distribution of the infrared rays irradiated onto the surface of the glass tube 2 uniform, the glass melts uniformly. Therefore, the shape of the glass tube 2 could be made constant. Further, by providing 27 infrared lamps, it is possible to increase the energy density of the emitted infrared rays, so there is an advantage that the element can be encapsulated in a shorter time.

[0011]

Effects of the Invention As explained above, the present invention has the advantage of increasing the energy density of infrared rays irradiated onto the glass tube surface by arranging infrared lamps so as to face both sides of a glass tube with a circular cross section, which is an object to be heated. This has the effect that it is possible to obtain a glass tube sealing device in which elements can be sealed with uniformity and a stable external shape.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing a glass tube sealing device in an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a conventional example of a glass tube sealing device.

[Explanation of symbols]

1 Lead piece 2 Glass tube 3 Reflector 4 Infrared lamp 5 Power supply section

Claims (1)

[Claims] Claim 1: Insert a pair of lead pieces into a glass tube,
A glass tube sealing device for performing sealing, comprising infrared lamps arranged opposite to each other with the glass tube sandwiched therebetween, and sealing the glass tube by irradiating the glass tube with infrared rays. .