CN105546382A - LED lamp tube and manufacturing process thereof - Google Patents

Abstract

The invention discloses an LED lamp tube and a manufacturing process thereof, and belongs to the field of fixation of light sources in lighting devices. The LED lamp tube and the manufacturing process thereof are used for solving the problems that the service life is short and an LED lamp strip is complex to mount due to the fact that an LED lamp strip in an existing LED lamp tube is fixed through adhesive belt or gluing. The LED lamp tube comprises a glass tube body, two protruding columns are arranged on the inner wall of the glass tube body, and the LED lamp tube is manufactured through the procedures of melting raw materials into glass melt through the high temperature, stirring the glass melt, conducting forming and cutting a tube. The LED lamp tube and the manufacturing process thereof are mainly used for manufacturing LED lamps.

Description

A kind of LED lamp tube and its manufacturing process

technical field

The invention relates to the field of fixing a light source in an illuminating device, in particular to an LED lamp tube and a manufacturing process thereof.

Background technique

LED lamps use LEDs as illuminants, because they are green and environmentally friendly semiconductor electric light sources that save energy, have a long service life, and do not require frequent replacement of ballasts and other components, gradually replacing traditional fluorescent lamps. Existing LED lamps include glass lamp tubes and LED light strips. The LED light strips are fixed in the glass lamp tubes by adhesive tape or glue. LED lights have a short lifespan.

Contents of the invention

In order to solve the above problems, the present invention provides an LED light tube which is simpler and easier to install and fix the LED light bar and has a longer service life, and its manufacturing process.

The LED lamp tube of the present invention includes a glass tube body, and two convex columns are arranged on the inner wall of the glass tube body, the convex columns are parallel to the axis of the glass tube body, and the adjacent sides of the two convex columns form an arc shape.

The inner wall of the LED lamp tube according to the present invention is provided with two integrally formed convex columns, and the two convex columns form a card slot, and the card slot is used to hold the LED light bar, so that there is no need to use adhesive tape or fix it by gluing For the LED light bar, just insert the LED light bar directly into the space formed by the protruding posts. The LED light bar is not easy to fall off, and the service life is prolonged. The existence of the protruding posts makes the assembly of the LED light bar easier and more efficient. , Lower cost.

The manufacturing process of the LED lamp tube of the present invention comprises the following steps:

(1) Melt glass smelting: put the raw materials into the glass furnace and smelt them into molten glass at high temperature;

(2) Stirring of the molten glass: the molten glass melted in the glass furnace is introduced into the homogenizing barrel and stirred evenly;

(3) Hollow molding: there is a blowing pipe in the uniform material cylinder, and the blowing pipe is connected to the mold. The glass melt is cast from above the mold and gradually cooled. The blowing rod is blown in the blowing pipe to form a hollow. The tube body of the convex post;

The mold includes a platform top and a columnar bottom, the mold is provided with a longitudinal through hole passing through the mold and two longitudinal openings, the through hole is located at the center of the mold; the cross section of the opening is "C" shaped, and The two openings are symmetrically arranged;

(4) Tube body forming: transport the tube body to the tube cutting device, and the tube cutting device cuts the tube body into a certain length of glass tube body; during the transportation process, stress relief treatment is performed on the tube body.

Preferably, in step (4), the tube body is transported by a lamp tube transport device, and the transport is closed and negative pressure. This process step is carried out in a closed environment. One is that the temperature of the glass tube is too high to prevent employees or other equipment from being scalded. The other is that the process is carried out in a closed environment to prevent impurities from invading the glass tube and reducing the quality of the glass tube. For negative pressure transportation, it is enough to control the internal pressure of the lamp tube delivery device to be less than atmospheric pressure, the purpose is to ensure that the hollow glass tube body with smooth appearance can be formed.

Preferably, the stress relief is realized by a stress relief device, and the stress relief device includes an air compressor, an air supply pipe, a water cooling box, an air cooling pipe and a fixing ring, and the air cooling pipe is fixed around the fixing ring. The pipe body is conveyed through the central position of the fixed ring. The air-cooled tube is cooled by the water-cooled box, the air-cooled tube passes through the water-cooled box, and the air in the air-cooled tube is blown onto the glass tube body after being cooled to realize the cooling of the glass tube body.

Preferably, the top of the mold used in step (3) is in the shape of a truncated cone, and the bottom is in the shape of a cylinder.

Compared with prior art, the beneficial effect of the present invention is:

(1) The inner wall of the LED light tube produced by the present invention is provided with a convex column for placing the LED light bar, and the LED light bar can be directly inserted between the two convex columns to achieve fixation without using adhesive tape or fixing it by gluing. The assembly of the light bar is simpler, the assembly efficiency is higher, and the cost is lower;

(2) The LED lamp tube made by the present invention is integrally formed, and the manufacturing method is simple and easy to operate; and after the LED lamp tube is cooled by the air-cooled tube, the thermal stress on the glass tube can be eliminated, so that the glass tube stress can be eliminated more thoroughly , the glass tube has higher strength and is not easy to break;

(3) The mold used in the present invention can complete the LED lamp tube with convex post. An important reason why the lamp tube with convex post has not been successfully produced in the prior art is the selection of the mould. The setting of the opening of the mold provided by the invention provides a reliable guarantee for the formation of the convex post.

Description of drawings

Fig. 1 is the cross-sectional structure schematic diagram of the LED lamp tube that the present invention makes;

Fig. 2 is process flow diagram of the present invention;

Fig. 3 is a schematic diagram of the structure of the stress relief device in Fig. 2;

Fig. 4 is A-A direction view among Fig. 3;

Fig. 5 is the mold structure schematic diagram that the present invention uses;

Among them, 10-light tube; 20-mold;

101-glass tube body; 102-boss; 201-through hole; 202-opening;

301-glass furnace; 302-homogenizing cylinder; 303-blast pipe; 304-stress relief device; 305-pipe cutting device; 306-lamp tube conveying device;

3041-air compressor; 3042-water cooling box; 3043-air cooling pipe; 3044-fixing ring; 3045-air supply pipe.

detailed description

The present invention will be further explained below in conjunction with the accompanying drawings.

An LED lamp tube 10, comprising a glass tube body 101, two convex columns 102 are arranged on the inner wall of the glass tube body 101, the convex columns 102 are parallel to the axis of the glass tube body 101, and the two convex columns 102 are adjacent One side is curved. The glass tube body 101 is integrally formed with the boss 102 on its inner wall.

Its production method is as follows:

(1) Melt glass smelting: put raw materials into glass furnace 301 and smelt them into molten glass at high temperature;

(2) Stirring of the glass melt: the glass melt melted in the glass furnace 301 is introduced into the homogenizing barrel 302, and stirred evenly;

(3) Hollow molding: a blast pipe 303 is provided in the homogenizing cylinder 302, and the blast pipe 303 is connected to the mold 20. The molten glass is cast from the top of the mold 20 and gradually cooled, and the blast pipe 303 blows the rod to form A hollow body with two bosses 102 on the inner wall;

The mold 20 includes a platform top and a columnar bottom. The mold 20 is provided with a longitudinal through hole 201 and two longitudinal openings 202 passing through the mold 20. The through hole 201 is located at the center of the mold 20; the cross section of the opening 202 is It is in the shape of "C", and the two openings 202 are symmetrically arranged;

(4) Tube body forming: transport the tube body to the tube cutting device 305, and the tube cutting device 305 cuts the tube body into a certain length of glass tube body 101; during the transportation process, stress relief treatment is performed on the tube body.

The tube body is conveyed through the lamp tube conveying device 306, which is a closed type, negative pressure conveying device. The lamp tube conveying device 306 is provided with a conveying wheel, and the conveying wheel is provided with a closed cover for closed conveyance. This process step is carried out in a closed environment, one is because the temperature of the glass tube body is too high to prevent employees or other equipment from being scalded, and the other is to carry out in a closed environment to prevent impurities from invading the glass tube body 101 and reduce the quality of the glass tube body 101 . For negative pressure transportation, it is enough to control the internal pressure of the lamp tube delivery device to be less than atmospheric pressure, the purpose is to ensure that the hollow glass tube body with smooth appearance can be formed.

The lamp tube conveying device 306 is provided with a stress relief device 304, as shown in Figures 3 and 4, the stress relief device 304 includes an air compressor 3041, an air supply pipe 3045, a water cooling box 3042, an air cooling pipe 3043, and a fixed ring 3044 The air-cooled pipe 3043 is fixed on the fixed ring 3044 around the delivery wheel, and the pipe body is transported through the center of the fixed ring 3044. The air temperature in the air-cooled pipe 3043 is not higher than 5°C.

The mold 20 of the present invention has a frustum-shaped top and a cylindrical bottom, the radius of the bottom surface of the frustum-shaped top is the same as that of the cylindrical bottom, and the height ratio of the frustum-shaped top to the cylindrical bottom is 2:1. The end of the through hole 201 is provided with an internal thread, and one end of the blast pipe 303 is provided with an external thread, and the blast pipe 303 and the mold 20 are fixedly connected together through threads.

Claims (8)

1. a LED lamp tube, comprise canals of stilling (101), it is characterized in that, described canals of stilling (101) inwall is provided with two projections (102), the axis being parallel of described projection (102) and canals of stilling (101), two adjacent sides of projection (102) are curved.

2. LED lamp tube according to claim 1, is characterized in that, the height of described projection (102) and the ratio of canals of stilling (101) inwall radius are 1:2-7.

3. the LED lamp tube manufacture craft described in claim 1 or 2, is characterized in that, comprise the following steps:

(1) glass melts melting: dropped into by raw material in glass furnace (301), high temperature melting is smelt glass melts;

(2) glass melts stirs: imported in revolving sleeve (302) by the glass melts of glass furnace (301) interior melting, stir;

(3) hollow molding: establish blast pipe (303) in revolving sleeve (302), described blast pipe (303) connecting mold (20), glass melts also cools gradually from the casting of mould (20) top, bar is blown in blast pipe (303) interior air blast, formed hollow, inwall has the body of two projections (102);

Described mould (20) comprises bottom mesa-shaped top and column, mould (20) is provided with longitudinal hole (201) and two longitudinal openings (202) of through mould (20), and described through hole (201) is positioned at mould (20) center position; Described opening (202) cross section is " C " font, and two opening (202) axial symmetry are arranged;

(4) pipe forming: body is delivered to pipe installation (305), body is cut into the canals of stilling (101) of certain length by described pipe installation (305); In course of conveying, stress relief treatment is carried out to body.

4. LED lamp tube manufacture craft according to claim 3, is characterized in that, step (4) middle tube body by fluorescent tube conveying device (306) conveying, and is closed, negative pressure transportation.

5. LED lamp tube manufacture craft according to claim 3, is characterized in that, stress elimination described in step (4) is realized by stress eliminating device (304).

6. LED lamp tube manufacture craft according to claim 5, it is characterized in that, described stress eliminating device (304) comprises air compressor (3041), ajutage (3045), water cooling box (3042), forced air cooled tube (3043) and retainer plate (3044), and forced air cooled tube (3043) is fixed around retainer plate (3044).

7. LED lamp tube manufacture craft according to claim 6, is characterized in that, described body is through the conveying of retainer plate (3044) center position.

8. LED lamp tube manufacture craft according to claim 3, is characterized in that, described mould (20) top is round table-like, and bottom is cylindric.