KR100508106B1 - A Vacuum Control Expansion Tube Adapter For A Heat Contraction Tube - Google Patents

Abstract

The present invention is inserted into the upper portion of the expansion tube provided in the expansion chamber to form a step shape with a different diameter of the inner diameter to generate a vacuum force by a vacuum pump to the air inlet and the hole of the expansion tube to expand the one tube to the expansion tube inner diameter A vacuum degree self-adjusting expansion tube adapter for a heat shrink tube. To this end, in the tube expansion tube structure of the heat-shrinkable tube manufacturing apparatus, a hollow expansion tube is formed in which a predetermined closed space is formed and the tube is inserted into the center thereof, and the expansion tube is formed in the space formed around the outside. An expansion chamber in which a vacuum is formed; And a shape in which the hollow cylinder is vertically coupled to the hollow disc by being aligned with the center thereof and vertically coupled to the expansion tube, and the diameter φ D1 inside the center of the disc is smaller than the diameter φ D2 inside the center of the cylinder. It is characterized in that it comprises a; expansion tube adapter formed with a plurality of air inlet in the center direction at the outer periphery of the disc. The vacuum controller is connected to the vacuum valve and the expansion chamber so as to control the vacuum valve connected to the air inlet and the vacuum pressure of the expansion chamber.

Description

A Vacuum Control Expansion Tube Adapter For A Heat Contraction Tube

The present invention relates to an expansion tube adapter for use when expanding a heat shrink tube, and more particularly, is inserted into the upper portion of the expansion tube provided in the expansion chamber to form a stepped shape with different diameters and vacuum into the air inlet and the hole of the expansion tube. It relates to a vacuum degree automatic control expansion tube adapter for the heat shrink tube to generate a vacuum force by the pump to expand the original tube to the expansion tube inner diameter.

In general, the production of heat-shrinkable tube is to cross-link the tube extruded by the extruder through a water bridge or an electron beam bridge and to expand the original tube to a certain diameter through the expansion process.

1 is a schematic diagram of a tube expansion process for manufacturing a conventional heat shrink tube, Figure 2 is a cross-sectional view showing a conventional expansion tube adapter.

As shown in FIG. 1, the heat shrink tube installation is largely composed of a heating roll part, an expansion tube adapter 13, an expansion chamber 7, a vacuum expansion tube 15, and a cooling water injection nozzle. The original tube 5, which is configured as described above and wound around the supply roll 1 (Pay-Off) in the tube expansion process, is sent out, is heated through the dry heating roll 3, and the expansion tube 7 is heated. Inflated). Then, the expanded heat shrink tube is wound on the take-up roll 11 (Take-Up) along the guide roll and the take-up portion 9 to produce a heat shrink tube product.

That is, the one tube 5 is introduced into the expansion chamber 7 and a vacuum force is generated by the vacuum pump through the holes of the expansion tube 15 to expand the one tube 5 to the inner diameter of the expansion tube 15.

As in the conventional expansion tube adapter 13 shown in FIG. 2, the inner diameter of the conventional expansion tube adapter 13 has a constant inner diameter of φD1, and according to the outer diameter or working conditions of the one-tube 5, the expansion tube adapter ( By changing the inner diameter of 13), it is set as the working standard.

Here, the tube expansion process in more detail, the one-tube (5) supplied from the supply roll (1) is uniformly dry heating to about 120 ℃ in the heating roll portion and enters the expansion tube (15) by the driving force the one tube (5) ) Is introduced into the vacuum expansion tube (15) via the expansion tube adapter (13) having an inner diameter suitable for the outer diameter.

The introduced tube 5 is applied to the surface of the tube 5 by a small hole processed in the outer surface of the vacuum expansion tube 15 by the vacuum force generated by the vacuum pump and applied in the tube 5. The sum of the pressures causes expansion by the diameter of the expansion tube 15 in the vacuum expansion tube 15.

The expanded one-tube (5) is in close contact with the outer wall of the vacuum expansion tube (15) having excellent thermal conductivity, and is cooled by the cooling water injected from the cooling water injection nozzle to escape the vacuum chamber (Chamber) of the take-out portion (9) It is wound on the take-up roll (11) through. At this time, when the inner tube 5 heated on the heating roll and the inner surface of the expansion tube adapter 13 come into contact with each other, the expansion tube adapter 13 has a great influence on the longitudinal stretching of the original tube 5 due to friction. The inner diameter and the shape of can be changed according to the standard of the one tube (5).

However, since the inner diameter of the expansion tube adapter 13 and the outer diameter of the tube may vary slightly depending on the skill of the operator or the machine, the inner diameter of the expansion tube adapter 13 should be determined through experiments for each inflator.

The quality of the expanded heat-shrinkable tube is better assessed when the longitudinal shrinkage of the tube is small and uniform when the surface is heated. In addition, the uniformity of the longitudinal shrinkage ratio depends on the longitudinal stretching of the one-tube 5, but in order to reduce the longitudinal stretching, friction generated at the inner diameter of the expansion tube adapter 13 should be reduced.

In the expansion process of the one-tube (5) introduced into the conventional expansion tube adapter 13 is entered into the expansion chamber (7) by the driving force of the take-up portion 9 while the surface temperature is heated to about 120 ℃ on the heating roll The one-tube (5) has an inner diameter of 1.5 mm, the diameter of the tube tube is 10 mpm, the diameter of the one-tube (1) is 1 mm, the expanded outer diameter of the tube is 5 mm, the internal supplementary pressure of 0.4 atm, and the vacuum setting is 580. Worked with torr.

The one-tube 5 passing through the expansion tube adapter 13 is expanded in the expansion tube 15, the air inlet of the expansion tube 15 is mainly through φ D1 of the expansion tube adapter 13 shown in FIG. Air inflows occur irregularly.

This causes fluctuations in the vacuum pressure and the fluctuations in the vacuum pressure appear as irregularities in the heat shrink tube elongation. In addition, the internal diameter of the expansion tube adapter 13 is changed to repeat the operation until a constant vacuum degree and elongation are obtained.

In the experiment of the conventional expansion tube adapter 13, the inner diameter of the expansion tube adapter 13 is 1.5mm, the tube flux is 10 mpm, the diameter of the one-tube 5 is 1mm, the expanded outer diameter of the tube is 5mm, the internal supplementary pressure 0.4 atm , Vacuum degree setting was carried out under the conditions of 580 torr.

Here, in the case of the conventional expansion tube adapter 13, as a result of calculating 60 pieces of data, the average printing length was 118.03 mm, the maximum and minimum printing lengths were 121 mm and 114 mm, respectively, and R was 7 mm, indicating an average ± 2.7% elongation. .

In addition, stretching occurs when the friction caused by the difference in diameter of the original tube 5 and the diameter of the expansion tube adapter 13 and the force generated between the take-out portion 9 is greater than the strength of the tube. However, the conventional expansion tube adapter 13 does not reduce the stretching of the heat-shrinkable tube or immediately respond to external disturbances such as the outer diameter and the degree of crosslinking of the original tube 5, so that the expansion tube capable of immediately responding to the frictional force related to the stretching Improvement of the adapter 13 is essential.

Accordingly, the present invention has been made in view of the above-described conventional problems, and a first object of the present invention is to expand the adapter into a top portion of an expansion tube provided in the expansion chamber to have a stepped shape with different diameters. Vacuum valve connected to the air inlet, vacuum pump and vacuum controller connected to the expansion chamber are automatically controlled to control the vacuum pressure, and vacuum force is generated to automatically expand the vacuum tube for the heat shrink tube to expand the original tube to the inner diameter of the expansion tube. It is to provide a tube adapter.

The second object of the present invention is the shape of the expansion tube adapter is a hollow cylinder is vertically coupled to the hollow disk to the outer air into the air inlet formed in the radially formed in the disk by friction when inflating the heat shrink tube The present invention provides a vacuum-adjustable expansion tube adapter for heat shrink tubes that reduces the frictional force by uniformly distributing the stress and distributes the stress applied to the tube, thereby reducing longitudinal stretching and stretching deviation.

In addition, a third object of the present invention is to provide a vacuum degree automatic adjustment expansion tube adapter for a heat shrink tube having a vacuum controller connected to the expansion tube to which the expansion tube adapter is inserted and which controls the vacuum degree according to the vacuum degree setting.

The object of the present invention, in the tube expansion tube structure of the heat shrink tube manufacturing apparatus,

An expansion chamber provided with a hollow expansion tube through which a tube is inserted into a central portion to form a predetermined closed space, and a vacuum being formed in the space in which the expansion tube is formed around the outside; And

The hollow cylinder is fitted to the upper portion of the expansion tube and the hollow cylinder is vertically coupled to match the center, the diameter φD1 inside the center of the disc is smaller than the diameter φD2 inside the center of the cylinder, the disc The expansion tube adapter formed with a plurality of air inlet in the center direction at the outer periphery of the vacuum degree for heat-shrink tube is achieved by the automatic control expansion tube adapter.

The vacuum controller is connected to the vacuum valve and the expansion chamber so as to control the vacuum valve connected to the air inlet and the vacuum pressure of the expansion chamber.

In addition, the air inlet formed in the disk of the expansion tube adapter is characterized in that the plurality of radially formed in the center direction from the outer periphery.

In addition, the inner diameter of the central portion of the expansion tube adapter is formed in a stepped shape in which the diameter φ D1 inside the center of the disc is smaller than the diameter φ D2 inside the center of the cylinder and gradually increases in diameter to the inner diameter of the expansion tube. It is done.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration and effect of the present invention.

3 is a schematic diagram of a tube expansion process for producing a heat shrink tube.

As shown in the tube expansion schematic of FIG. 3, the one tube 120 wound on the supply roll 100 (Pay-Off) is sent out, and the one tube 120 is heated through the dry heating roll 110, and the expansion chamber ( Within 200). The expanded heat shrink tube is wound on the take-up roll 140 (Take-Up) along the guide roll and the take-up portion 130 to make a heat shrink tube product.

The manufacturing process of the heat shrink tube is generally the same, and among them, the expansion tube adapter 300 applied to the expansion tube 250 in the expansion chamber 200, which is a main component, has a direct influence on the quality of the heat shrink tube manufactured.

Figure 4 is a schematic cross-sectional view of the expansion chamber to which the expansion tube adapter according to the present invention is applied, Figure 5 is a cross-sectional view showing a detailed view of the expansion tube adapter according to the present invention, Figure 6 is an expansion tube adapter according to the present invention An airflow diagram showing the airflow inside.

In addition, as shown in FIG. 4, the expansion tube adapter 300 is applied to the expansion tube 250, and the expansion tube adapter 300 of the present invention will be described in more detail with reference to FIG. 5. do.

In the expansion tube adapter 300 of the present invention, a hole is formed in the circumference of the center, and the inner diameter of the center is φD1 and φD2 divided into different diameters and processed.

And, as in the air flow diagram in the expansion tube adapter 300 according to the present invention shown in Figure 6, the vacuum gauge 420 is connected to the vacuum expansion tube 250 and the mechanism for controlling the vacuum degree according to the vacuum degree setting Have.

In addition, as shown in FIG. 3, the one-tube 120 heated in the dry heating roll 110 enters the expansion chamber 200, and the one-tube 120 in the expansion chamber 200 has an expansion tube adapter ( 300), the nozzle unit of the expansion tube 250, the expansion tube 250 is expanded, and then wound up in the winding roll 140.

When the expansion tube adapter 300 is viewed in detail, the one-tube 120 enters a place where the inner diameter of the adapter is φD1 as shown in the expansion tube adapter 300 shown in FIG.

And as shown in the air flow diagram in the expansion tube adapter 300 shown in Figure 6 through the vacuum valve 400 through the inlet of the expansion tube adapter 300 along the eight hoses of the expansion tube adapter 300 It exits to the center φD2 and is discharged out of the expansion chamber 200 by the vacuum of the vacuum pump 410.

Here, the vacuum degree is set through the vacuum valve 400 for the necessary constant external air as in the air flow diagram in the expansion tube adapter 300. In addition, through the mechanism for controlling the degree of vacuum, the external air is introduced into φD2 and the structure is discharged out of the expansion chamber 200 through the vacuum pump 410.

The one tube 120 enters into the expansion chamber 200 in which the expansion tube 250 is coupled while the surface temperature of the heating tube is heated to about 120 ° C., and the vacuum degree of the expansion chamber 200 is improved. The vacuum valve 400 is connected to the hose of the adapter 300.

At this time, the incoming tube flux is 10 mpm, the diameter of the one-tube 120 is 1mm, the expanded outer diameter of the tube is 5mm, the improved expansion tube adapter 300 φD1 1mm, the improved expansion tube adapter 300 φD2 Is 2mm, internal supplementary pressure 0.4 atm, vacuum degree setting is 580 torr, vacuum gauge 420 is 580 ± 2 torr, and the vacuum controller 430 opens and closes the vacuum valve 400 to follow the vacuum set value. Was carried out.

Here, the air flowing into the expansion tube adapter 300 is blocked primarily from entering the φ D1 as shown in the improved expansion tube adapter 300 of FIG. 5, and the air flows through the vacuum valve 400 connected to the hose. Let influx occur. And the air volume is adjusted through the vacuum controller 430.

In the experiment of the expansion tube adapter 300, the tube flux is 10 mpm, the diameter of the one tube 120 is 1mm, the expanded outer diameter of the tube is 5mm, the expansion tube adapter 300 φD1 1mm, expansion tube adapter 300 φD2 2mm, internal replenishment pressure 0.4 atm, the vacuum setting was 580 torr, the vacuum gauge 420 was carried out at 580 ± 2 torr.

In the case of the expansion tube adapter 300, 60 data were calculated, and the average print length was 117.664 mm, the maximum and minimum print lengths were 120.5 mm and 115 mm, respectively, and R was 5.5 mm, indicating an elongation of ± 2.3%.

Thus, the present invention can confirm the quality of the heat shrink tube improved compared to the existing experimental results.

As described above, according to the vacuum degree automatic adjustment expansion tube adapter 300 for a heat shrink tube according to the present invention, the expansion tube adapter 300 is inserted into the upper portion of the expansion tube 250 provided in the expansion chamber 200 to the inner diameter. The vacuum valve 400 connected to the air inlet 310 and the vacuum pump 410 and the vacuum controller 430 connected to the expansion chamber 200 are connected to each other to form a stepped shape with different diameters to automatically generate a vacuum pressure. The vacuum force is generated by adjusting and expanding the one tube 120 to the inner diameter of the expansion tube 250.

In addition, the shape of the expansion tube adapter 300 is a shape in which the hollow cylinder 330 is vertically coupled to the hollow disk 320 to the air inlet 310 formed in the radial shape on the disk 320 to the outside air. By injecting the uniform friction distribution during expansion of the heat-shrinkable tube to reduce the frictional force and distribute the stress applied to the tube has the effect of reducing the longitudinal stretching and stretching deviation.

In addition, there is an advantage in that the vacuum gauge 420 is connected to the expansion tube 250 into which the expansion tube adapter 300 is inserted, and the vacuum degree can be controlled according to the vacuum degree setting.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

1 is a schematic diagram of a tube expansion process for manufacturing a conventional heat shrink tube,

2 is a cross-sectional view showing a conventional expansion tube adapter,

3 is a schematic diagram of a tube expansion process for producing a heat shrink tube;

4 is a schematic cross-sectional view of an expansion chamber to which the expansion tube adapter according to the present invention is applied;

5 is a cross-sectional view showing a detailed view of the expansion tube adapter according to the present invention,

6 is an air flow diagram showing the air flow in the expansion tube adapter according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: supply roll 3: dry heating roll

5: one tube 7: expansion chamber

9: take-out portion 11: winding roll

13: expansion tube adapter 15: expansion tube

100: supply roll 110: dry heating roll

120: one tube 130: take-out

140: winding roll 200: expansion chamber

250: expansion tube 300: expansion tube adapter

310: air inlet 320: disc

330: cylinder 400: vacuum valve

410: vacuum pump 420: vacuum gauge

430: vacuum controller

Claims (4)

In the tube expansion tube 250 structure of the heat shrink tube manufacturing apparatus, An expansion chamber 200 in which a hollow expansion tube 250 is formed in which a tube is inserted into a central portion of the tube to form a predetermined closed space, and a vacuum is formed in the space in which the expansion tube 250 is formed around the outside. ; And The cylindrical tube 330 is fitted to the upper portion of the expansion tube 250 and the hollow cylinder 330 is vertically coupled to match the center, the diameter φD1 in the center of the disk 320 is the cylinder Heat shrinkage is smaller than the diameter φD2 inside the center of the 330, the expansion tube adapter 300 formed with a plurality of air inlet 310 in the center direction at the outer periphery of the disc 320; Vacuum-adjustable expansion tube adapter for tubes. The vacuum controller of claim 1, wherein the vacuum valve 400 and the expansion chamber 200 are controlled to adjust the vacuum valve 400 connected to the air inlet 310 and to control the vacuum pressure of the expansion chamber 200. 430 is connected to adjust the vacuum pressure vacuum degree automatic adjustment expansion tube adapter for heat shrink tube. According to claim 1, wherein the air inlet 310 formed in the disc 320 of the expansion tube adapter 300 is a plurality of radially in the center direction from the outer periphery, the degree of vacuum for heat shrink tube is automatically adjusted Expansion tube adapter. According to claim 1, wherein the inner diameter of the central portion of the expansion tube adapter 300 has a diameter φ D1 inside the center of the disc 320 is smaller than the diameter φ D2 inside the center of the cylinder 330 to the expansion tube 250 Auto-expansion vacuum expansion tube adapter for heat shrink tube, characterized in that formed in the form of a step to increase the diameter step by step.