KR102659214B1 - Sizing device for tube extrusion molding - Google Patents

Abstract

The present invention relates to a sizing device for tube extrusion that forms a circular shape and maintains the shape of a tube extruded from an extruder.
That is, the present invention is a sizing device for sizing a tube extruded from an extruder to a certain shape and size before completely cooling it, and the cooling water is sprayed onto the surface of the tube from the inlet of the first tube guide pipe to ensure fluidity. A first section, a second section that allows checking whether the extrusion amount and withdrawal speed of the tube are appropriate by sloshing water in contact with the surface of the tube in the gap between the first tube guide pipe and the second tube guide pipe, A third section in which a plurality of through holes are formed at equal intervals around the cylindrical third tube guide pipe connected to the tip of the second tube guide pipe to form the outer diameter and size of the tube and vacuum and cooling are performed, the third section It is characterized by a sizing device for tube extrusion molding consisting of a fourth section in which a plurality of tube guide plates with tube guide holes formed in front of the three sections are placed at regular intervals to prevent bubbles and scratches on the surface of the tube. .

Description

Sizing device for tube extrusion molding}

The present invention relates to a sizing device for tube extrusion that forms a circular shape and maintains the shape of a tube extruded from an extruder.

In general, synthetic resin tubes are extruded with a certain cross-section by a mold provided in an extruder, and before being completely cooled, the synthetic resin tube passes through a sizing device that forms and holds the shape of the tube. The passing synthetic resin tube is completely cooled in a vacuum water bath, and the cooled synthetic resin tube is pulled out by a draw machine and then cut to the required length by a cutter.

In particular, for synthetic resin tubes produced by extrusion from an extruder mold, most of the quality (roughness, shape, etc.) is determined in the sizing process, so the sizing process is very important in the extrusion process.

However, the conventional sizing device guides the synthetic resin tube that is continuously extruded from the mold of the extruder at a certain distance from the mold. Since there is no special device when the synthetic resin tube enters the sizing device, the synthetic resin tube that has not been cooled after being extruded from the mold is Not only were there problems with not making it properly, such as damaging the surface, but there was also a problem with not knowing whether the withdrawal speed was appropriate depending on the amount of extrusion.

KR No. 10-0333038 KR No. 10-0915130 KR No. 10-1001703 KR No. 10-0764990

The present invention is intended to solve this problem, and includes a first section to ensure fluidity through lubrication using cooling water on the surface of the tube extruded from the inlet of the sizing device, and an appropriate extrusion amount and withdrawal speed of the tube. A second section is used to check the tube's outer diameter and size, a third section is used to create vacuum and cooling, and a fourth section is used to prevent foreign substances, bubbles, scratches, etc. from forming on the surface of the tube. The aim is to provide a sizing device for tube extrusion molding that is equipped with a sizing device that eliminates factors causing defects in tubes and produces uniform products.

The present invention relates to a sizing device for sizing a tube extruded from an extruder to a certain shape and size before completely cooling it, in which cooling water is sprayed onto the surface of the tube from the inlet of the first tube guide pipe to ensure fluidity. Section, a second section in which it is possible to check whether the extrusion amount and withdrawal speed of the tube are appropriate by sloshing water in contact with the surface of the tube in the gap between the first tube guide pipe and the second tube guide pipe, A third section where a plurality of through holes are formed at equal intervals around the third tube guide pipe, which is connected to the tip of the two-tube guide pipe and has a cylindrical shape, to form the outer diameter and size of the tube, and where vacuum and cooling are performed, the third section. A sizing device for tube extrusion is characterized by a fourth section in which a plurality of tube guide plates with tube guide holes formed in front of the tube are arranged at regular intervals to prevent bubbles and scratches on the surface of the tube.

In the first section, a plurality of spray nozzles are formed on an inlet guide surface inclined at the entrance of the first tube guide pipe, so that the coolant supplied from the coolant supply unit is sprayed through the spray nozzles, just before flowing into the first tube guide pipe. It is characterized in that coolant is sprayed on the surface of the extruded tube.

In the second section, the second section is disposed between the first support of the first section and the second support of the third section, and is spaced apart from the tip of the first tube guide pipe to form a gap so that water contacts the surface of the tube. A second tube guide pipe is disposed, and a transparent cylindrical water pipe is disposed in an outer direction around the second tube guide pipe. An inlet is formed at the bottom of the water pipe, so that water flows in, and a water outlet is formed at the top to provide a water outlet. It is characterized in that it is possible to check the sloshing of water discharged through.

It is characterized in that a scale indicator is placed on one side of the water outlet of the water pipe so that the sloshing of water can be confirmed through the scale indicator.

The fourth section is characterized in that a plurality of tube guide plates having tube guide holes provided at right angle ends inside the disk are arranged at regular intervals.

The sizing device for tube extrusion molding of the present invention can secure fluidity by lubricating the surface of the tube extruded from the extruder using cooling water, and visually confirms whether the extrusion amount and withdrawal speed of the tube are appropriate, providing standard information and In addition to controlling the optimal tube extrusion amount and withdrawal speed, the outer diameter and size of the tube are formed, vacuum and cooling are performed, and foreign substances, bubbles, scratches, etc. are sequentially removed from the surface of the tube. As a result, it is possible to provide high-quality tubes with a smooth and uniform appearance, which has the effect of greatly increasing competitiveness.

1 is a front view showing the overall configuration of the sizing device for tube extrusion molding according to the present invention.
Figure 2 is a side view of the first section of the sizing device for tube extrusion molding according to the present invention.
Figure 3 is a front view showing the overall configuration of the sizing device for tube extrusion molding according to the present invention.
Figure 4 is a cross-sectional illustration showing a tube being sized by the sizing device for tube extrusion according to the present invention.
Figure 5 is an enlarged cross-sectional view showing the first to third sections of the sizing device for tube extrusion molding according to the present invention.
Figure 6 is an enlarged cross-sectional view showing the first section and the second section of the sizing device for tube extrusion molding according to the present invention.
Figure 7 is an enlarged cross-sectional view showing a scale indicator installed on one side of the water outlet at the top of the water pipe in the second section in the sizing device for tube extrusion molding according to the present invention.
Figure 8 is an enlarged cross-sectional illustration showing the sizing process of a tube in the fourth section of the sizing device for tube extrusion molding according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail as follows. Also, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The sizing device for tube extrusion according to the present invention includes a first section (A) that ensures fluidity through lubrication using cooling water on the surface of the tube extruded from the extruder, and the extrusion amount and withdrawal speed of the tube. A second section (B) to check the appropriateness of the tube, a third section (C) where the outer diameter and size of the tube are formed and vacuum and cooling are performed, and a third section (C) where foreign substances, bubbles, scratches, etc. are generated on the surface of the tube. It is characterized by consisting of a fourth section (D) that prevents this.

In the first section (A), a plurality of spray nozzles 12 are formed on the inlet guide surface 11 inclined at the entrance of the first tube guide pipe 10 of the sizing device, and coolant supplied from the coolant supply unit 14 is sprayed. It is configured to be sprayed through the nozzle 12, and this means that the cooling water is sprayed on the surface of the extruded tube (T) just before the tube extruded from the extruder flows into the first tube guide pipe (10), thereby creating the first In addition to cooling, the lubrication effect that provides fluidity to the surface of the tube allows the tube (T) to move smoothly in the direction of travel of the first tube guide pipe (10).

A cooling water supply unit 14 is provided inside the first support 13 constituting the first tube guide pipe 10 and the inlet guide surface 11 so that coolant can be sprayed through the injection nozzle 12, It is preferable that the spray nozzles 12 are arranged in an arc at equal intervals on the inlet guide surface 11, and the coolant spray amount is controlled through a flow meter.

A second section (B) is disposed between the first support (13) of the first section (A) and the second support (32) of the third section (C), and the second section (B) is the first tube guide. A second tube guide pipe 20 is spaced apart from the tip of the pipe 10 to form a gap 21, and a transparent cylindrical water pipe 22 is disposed in the outer circumferential direction of the second tube guide pipe 20. The water pipe 22 is configured such that an inlet 23 is formed at the bottom to allow water to flow in, and an outlet 24 is formed at the top to allow water to discharge, so that a certain amount of water continuously flows through the water pipe 22. It is provided.

In this second section (B), in the process of moving the tube of the second tube guide pipe (20) through the first tube guide pipe (10) of the first section (A), the first tube guide pipe (10) and the The gap 21 between the two-tube guide pipes 20 allows the water flowing through the water pipe 22 to contact the surface of the tube T. At this time, the water in the water pipe 22 is in contact with the tube. It is used to check whether the extrusion amount and withdrawal speed of the tube are appropriate by using the difference in water sloshing (shaking) depending on the tube extrusion amount and withdrawal speed of the extruder. This is due to the imbalance in the extrusion amount and withdrawal speed of the tube. This is to prevent defects from occurring.

That is, a certain amount of water is continuously and uniformly supplied to the inlet 23 of the water pipe 22 and discharged through the outlet 24, and is optimized when the water flowing through the water pipe 22 contacts the surface of the tube T. Obtain the water sloshing information in advance regarding the extrusion amount and withdrawal speed of the tube, use this as a reference point to pre-set information on the optimal tube extrusion amount and withdrawal speed according to the water sloshing, and then sizing the actual tube with the above-set information is performed. By comparing the sloshing state of the water occurring at the time, if the sloshing state of the water is outside the set range, the extrusion amount or withdrawal speed of the tube is adjusted to ensure that sizing is performed under the conditions of the optimal tube extrusion amount and withdrawal speed.

At this time, a scale indicator (25) is placed on one side of the water outlet (24) of the water pipe (22) so that changes in the level of water discharged through the water outlet (24) of the water pipe (22) can be easily checked with the scale indicator (25). It is desirable to be able to easily check whether the water sloshing is appropriate according to the extrusion amount and withdrawal speed of the tube.

In the third section (C), the third tube guide pipe 30 connected to the distal end of the second tube guide pipe 20 is disposed on the second support 32, and the third tube guide pipe 30 has a cylindrical shape. It is a structure in which cooling and vacuum are achieved simultaneously by forming a plurality of through holes 31 at equal intervals around the long pipe and placing them in a vacuum water tank (not shown).

In this third section (C), a vacuum is created when the tube moves to the third tube guide line 30, so that the tube adheres to the inner peripheral surface of the third tube guide line 30, forming the outer diameter shape and size of the tube. The through hole 31 is formed with 360 to 400 holes of approximately 1 mm or less.

The fourth section (D) is a configuration in which a plurality of tube guide plates 40 having tube guide holes 41 provided at right angle ends inside the disk are arranged at regular intervals, and the tubes have a plurality of tube guide holes. By sequentially moving along (41), the surface of the tube is scraped by the right-angled end of the tube guide hole (41), thereby removing bubble marks or scratches.

That is, in the tube guide plate 40 of the fourth section (D), the gap maintenance rings 42 are arranged alternately to maintain a constant distance, but the gap maintenance ring 42 is located at a distance from the tube guide hole 41. It is installed so as not to affect the action of scraping the surface of the tube using the right-angled end of the tube guide hole 41, and this fourth section (D) is operated before entering the vacuum water tank (not shown) where complete cooling is performed. Approximately 30 tube guide plates (40) with a thickness of approximately 2 mm are arranged at intervals of approximately 3 mm, and air bubbles, scratches, etc. are removed by sequentially moving the tube guide holes (41) of these tube guide plates (40). This was done to provide a high-quality tube with a uniform product.

This invention corresponds to a sizing device that forms a circular shape and holds the shape of a synthetic resin tube extruded from an extruder with a certain cross-section before it is completely cooled.

According to the present invention, when the tube extruded from the extruder enters the first section (A) of the sizing device, the cooling water sprayed on the surface of the tube through the injection nozzle 12 formed at the entrance of the first tube guide pipe 10 Primary cooling is achieved by this, and the tube moves smoothly in the direction of travel of the first tube guide pipe (10) due to a lubricating effect that provides fluidity to the surface of the tube, and then moves to the second section (B).

When the tube entering the second section (B) passes through the gap 21 between the first tube guide pipe 10 and the second tube guide pipe 20, the surface of the tube is exposed to the water flowing within the water pipe 22. When in contact with water, sloshing of water occurs, which can be visually confirmed through the water outlet 24 of the water pipe 22.

In other words, compared to the set standard information for the extrusion amount and withdrawal speed of the tube, which is optimized because it is generated by contact with the tube, the extrusion amount or withdrawal speed of the tube is adjusted to the standard information when the water sloshing is small or large.

Subsequently, the tube entering the third section (C) moves through the third tube guide pipe 30, in which a plurality of through holes 31 are formed at equal intervals around the cylindrical long tube, and cooling and vacuum are carried out simultaneously. In addition, it comes into close contact with the inner peripheral surface of the third tube guide pipe 30 to form the outer diameter shape and size of the tube, and then moves to the fourth section (D).

In the fourth section (D), the surface of the tube is scraped by the right angle end of the tube guide hole 41 while moving sequentially along the tube guide hole 41 formed in the plurality of tube guide plates 40 arranged at regular intervals. As a result, bubble marks or scratch marks are removed and then a complete cooling process is performed.

In this way, the present invention ensures the fluidity of the tube extruded from the extruder by lubricating the surface of the tube using cooling water in the first section (A) of the sizing device, and the extrusion of the tube in the second section (B). By visually checking whether the amount and withdrawal speed are appropriate, you can adjust the optimal tube extrusion amount and withdrawal speed by comparing them with standard information. In the third section (C), the outer diameter and size of the tube are formed, and vacuum and cooling are achieved. Then, foreign substances, bubbles, scratches, etc. are removed from the surface of the tube through the fourth section (D), thereby providing a high-quality tube with a smooth and uniform appearance.

In the above, the present invention has been described with reference to the above embodiments, but of course, various modifications are possible within the scope of the technical idea of the present invention.

A: 1st section 10: 1st tube guide pipe
11: Inlet guide surface 12: Spray nozzle
13: first support 14: cooling water supply unit
B: Second section 20: Second tube guide pipe
21: gap 22: water pipe
23: inlet port 24: outlet port
25: Tick indicator C: 3rd section
30: Third tube guide pipe 31: Through hole
32: second support D: fourth section 40: tube guide plate 41: tube guide hole 42: gap maintenance ring T: tube

Claims (5)

In the sizing device for sizing the tube extruded from the extruder to a certain shape and size before completely cooling,
A first section (A) in which cooling water is sprayed onto the surface of the tube from the inlet of the first tube guide pipe (10) to ensure fluidity,
To check whether the extrusion amount and withdrawal speed of the tube are appropriate by sloshing when water comes into contact with the surface of the tube in the gap 21 between the first tube guide pipe 10 and the second tube guide pipe 20. Han 2nd section (B),
A plurality of through holes 31 are formed at equal intervals around the third tube guide pipe 30, which is connected to the tip of the second tube guide pipe 20 and has a cylindrical shape, to form the outer diameter and size of the tube, and to form a vacuum and Third section (C) where cooling takes place,
A fourth section ( D) A sizing device for tube extrusion, characterized in that it consists of:
According to clause 1,
The first section (A) is,
A plurality of spray nozzles (12) are formed on the inlet guide surface (11) inclined at the entrance of the first tube guide pipe (10), so that the coolant supplied from the coolant supply unit (14) is sprayed through the spray nozzles (12). A sizing device for tube extrusion, characterized in that cooling water is sprayed on the surface of the extruded tube immediately before flowing into the first tube guide pipe (10).
According to clause 1,
The second section (B) is,
The second section (B) is disposed between the first support (13) of the first section (A) and the second support (32) of the third section (C), but is spaced apart from the tip of the first tube guide pipe (10). A second tube guide pipe (20) is disposed so that a gap portion (21) is formed to allow water to contact the surface of the tube, and a transparent cylindrical water pipe (22) is disposed in the outer circumferential direction of the second tube guide pipe (20). ) is disposed, and the water pipe 22 is characterized in that an inlet 23 is formed at the bottom to allow water to flow in, and a water outlet 24 is formed at the top to confirm the sloshing of water discharged through the outlet 24. A sizing device for tube extrusion molding.
According to clause 3,
A sizing device for tube extrusion molding, characterized in that a scale indicator (25) is placed on one side of the water outlet (24) of the water pipe (22) so that the sloshing of water can be confirmed through the scale indicator (25).
According to clause 1,
The fourth section (D) is,
A sizing device for tube extrusion molding, characterized in that a plurality of tube guide plates (40) each having tube guide holes (41) provided at right angle ends inside a disk are arranged at regular intervals.