KR100851875B1 - Oxygen Barrier Shrink Film Manufacturing Equipment - Google Patents

Abstract

The present invention relates to an oxygen barrier shrink film production apparatus, and in particular, to maintain the shape and thickness of the 5-layer low-temperature sealing meat-processing oxygen barrier film to be produced is invented to enable continuous molding.

The constitution of the present invention includes an extruder (1) for melting and extruding a synthetic resin raw material; A primary drawing machine (10) for forming a raw material extruded by the extruder (1) into a tube shape and drawing the tube 4 in an unstretched state to have a shrinkage ratio required; In what consists of the conveying winding machine 3 which conveys and winds the tube 4 extended | stretched through this primary drawing machine 10;

The primary stretching machine 10 is the secondary vertical stretching means 20 for discharging the raw material extruded from the extruder 1 in the vertical direction, and performing the secondary stretching while conveying vertically by its own load; It is achieved by being composed of a tertiary vertical drawing means 30 for tertiary drawing while conveying the tube 4 drawn in the secondary vertical drawing means 20 vertically again.

Description

A Manufacture system of oxygen cut off shrinkage film

1 is a schematic view showing a heat shrinkable tube manufacturing apparatus according to the present invention.

2 is a plan view of the present invention.

Figure 3 is a cross-sectional view showing the structure of the primary vertical stretching means.

Figure 4 is a cross-sectional view showing the structure of the secondary vertical stretching means.

Figure 5 is a cross-sectional view showing the structure of the heater.

Figure 6 is a cross-sectional view showing the structure of the tertiary vertical drawing means.

Explanation of symbols on main parts of drawing

1-Extruder 3-Feed Winding Machine
4-Tube 10-Primary Stretcher

20-2nd vertical stretching means 30-3rd vertical stretching means

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The present invention relates to an oxygen barrier shrink film manufacturing apparatus, and in particular, the invention is to enable continuous molding while maintaining the shape and thickness of the 5-layer low-temperature sealing meat processing oxygen barrier film to be produced.

In general, the heat shrink tube has a property of shrinking evenly in the axial direction when cured after heating, and is generally manufactured using polyvinyl chloride (PVC) or polyethylene terephthalate (PET) material.

The heat shrink tube manufacturing apparatus for manufacturing the heat shrink tube includes an extruder for melting and extruding a synthetic resin raw material, a drawing machine for stretching the raw material extruded from the extruder into a tubular shape and stretching to have a shrinkage rate that requires an unstretched tube. And, it is composed of a transfer windinger for conveying and winding the produced tube through this stretching machine.

The extruder, the stretching machine, and the transfer winding machine are made of horizontal lines, and the raw material extruded from the extruder is made into a heat shrink tube while passing through the stretching machine horizontally. Is transferred to the device.

The stretching machine is a preheating means for preheating the unstretched tube, which is solidified by cooling in the unstretched state, through a predetermined hot water, as proposed in Patent Registration No. 0365810, 'A stretching device of a thermoplastic polyester heat shrink tube'. The first conveying roller which compresses and conveys the preheated unstretched tube and the unstretched tube drawn out of the first conveying roller are instantaneously contacted with a high temperature heat medium while passing through a passage of a constant inner diameter and quenched by cooling water. And a second feed roller which draws the tube drawn in the width direction while being drawn out to the sizing means and is drawn in the longitudinal direction by a speed of compressing and conveying the tube while filling a predetermined amount of air therein.

However, in the conventional heat-shrink tube manufacturing apparatus, the stretching machine is configured to stretch the unstretched tube by the sizing means while transferring the unstretched tube horizontally through the first feed roller. This sagging often occurred.

Therefore, it is necessary to pay close attention to protect the shape of the tube to be stretched, it is difficult to maintain the shape of the heat-shrinkable tube, in particular the film thickness uniformly, there is a problem that the defect rate is increased, quality controllability is lowered.

On the other hand, the applicant of the present application has been proposed to install the vertical stretching means and horizontal stretching, respectively, in order to improve the conventional problems as known in the Korean Patent No. 632415.

However, this patent 632415 was able to improve the tube-shaped deformation to some extent during the stretching process, but there was a disadvantage that the upper and lower thicknesses of the tube were formed differently by the weight in the course of the horizontal stretching means.

An object of the present invention is to stretch while transferring the unstretched tube vertically by its own load at the time of stretching to prevent the deformation of the shape is deformed by its own load during stretching and to maintain the shape and film thickness uniformly and uniformly The present invention provides an oxygen barrier shrinkable film production apparatus.

An object of the present invention, the extruder (1) for melting and extruding a synthetic resin raw material;

A primary drawing machine (10) for forming a raw material extruded by the extruder (1) into a tube shape and drawing the tube 4 in an unstretched state to have a shrinkage ratio required;

In what consists of the conveying winding machine 3 which conveys and winds the tube 4 extended | stretched through this primary drawing machine 10;

The primary stretching machine 10 is the secondary vertical stretching means 20 for discharging the raw material extruded from the extruder 1 in the vertical direction, and performing the secondary stretching while conveying vertically by its own load;

It is achieved by being composed of a tertiary vertical drawing means 30 for tertiary drawing while conveying the tube 4 drawn in the secondary vertical drawing means 20 vertically again.

That is, when the raw material melted and extruded in the extruder 1 in the direction is discharged toward the ground by its own load, it automatically moves vertically, and the tube moves by stretching the first and second three times while moving vertically. In the case of stretching, the self load acts in the conveying direction so that the tube 4 can be stretched in a uniform shape and uniform thickness without being deformed by its own load.

Therefore, the marketability of the 5-layer low temperature sealing oxygen barrier shrinkage film especially for meat processing can be improved.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

1 is a schematic view showing a heat shrinkable tube manufacturing apparatus according to the present invention, the first vertical stretching means 10, the second vertical stretching means 20 and the third vertical stretching means 30 in the extruder 1, respectively. The heat shrink tube manufacturing line manufactured while being conveyed to the transfer winding machine 3 is schematically shown.

2 shows a state in which resins of different materials are supplied to the primary stretching machine 10 by five extruders 1 in a plan view of the present invention.

3 is a cross-sectional view showing the structure of the primary vertical stretching means (10).

4 is a cross-sectional view showing the structure of the secondary vertical drawing means 20.

5 is a cross-sectional view showing the structure of the heater.

6 is a cross-sectional view showing the structure of the tertiary vertical drawing means (30).

Hereinafter, as shown in FIG. 1, the oxygen barrier shrinkable film of the present invention includes three layers of nylon and EVA + PE material selected from nylon or EVOH used as a gas barrier resin, and a resin for low temperature sealing function. 5 raw materials are supplied to the primary stretching machine 10 through the extruder 1 so as to shape two layers of adhesives which are introduced for adhesion between these film layers.

The synthetic resin material extruded from the extruder 1 is molded into a substantially tubular shape in the primary drawing machine 10 and then molded to have a desired shrinkage ratio in the secondary vertical drawing means 20.

After finishing to maintain the dimensions and shape in the tertiary vertical drawing means (30) and then transported and stored through the transfer winding machine (3), the heat shrink tube is transferred to the packaging device used.

The extruder 1 arranges the conventional extruders 1 already known to melt-extrude the tube raw material to the desired temperature, in the present invention, so that only five of the outlets are collected in one place.

The conveying winding machine 3 is composed of conveying guide rollers for conveying the manufactured heat shrink tube, and a winding roller 3a for winding the conveyed heat shrink tube, and the winding roller 3a is manufactured by rotating by a motor. It is operated to wind the heat shrink tube.

The extruder 1 is supplied to the first vertical drawing means 10 in a thin 5-layer film structure by discharging five different raw materials as described above, with the discharge port vertically positioned toward the ground. Molded into shape.

The primary vertical drawing means 10 is mounted to the outlet of the extruder 1 as shown in Figure 3 and the bottom is formed by the tube (4) is formed through the outlet and the tube material is extruded downward through the outlet A tube forming mold 12 having a fluid supply passage for supplying a fluid heated to the center of the molding furnace, and a molding furnace discharged vertically toward the center of the molding furnace;

The vertical conveying path through which the tube 4 formed in the tube molding mold 12 is transported vertically is vertically drilled, and the heated fluid is supplied to the inner part of the tube 4 passing through the vertical conveying path. A heating unit 13 provided with a heating furnace for heating the tube 4 by applying a fluid heated outwardly;

A size hole forming a diameter of the tube 4 heated by the heating part 13 includes a vertical size ring 15 penetrating from the top to the bottom, and passes through the size hole of the vertical size ring 15. A cooling water tank 14 filled with cooling water for cooling the tube 4,

The first pinch roller (16a) for pressurizing the tube (4) passed through the vertical sizing ring (15) to be transferred to the secondary vertical drawing means 20 is mounted, falling from the coolant tank (14) It consists of a storage tank 16 capable of storing water.

The fluid supplied to the fluid supply path of the tube molding mold 12 and the heating path of the heating part 13 is supplied by heating air, and the air is heated by a separate air heating device to provide the fluid supply path. It is supplied to the furnace.

In addition, the fluid supplied to the fluid supply passage of the tube forming mold 12 and the heating furnace of the heating section 13 is usually heated between 60 ~ 80 ℃ and the injection pressure is in accordance with the diameter and shrinkage of the tube (4) to be molded It is possible to adjust by the operator at the time of manufacture, the configuration of this primary vertical link means (10) is found to be the same as the known art already known in the domestic patent 632415.

On the other hand, the fluid supplied to the inside of the tube (4) through the fluid supply path of the tube molding die 12 is to use the air to maintain a high temperature between 60 ~ 80 ℃, the injection pressure of the fluid is the first injection position At the outlet of the supply passage, the ejection speed is high, but the air pressure is very low at the position where the tube 4 reaches the storage tank 16 via the cooling water tank 14.

The tube 4 formed in the tube forming mold 12 is completely separated from each other by a relatively high air blowing speed at a position where the centers are likely to adhere to each other at a high temperature, and then passes through the coolant tank 14. Even if the tube 4 temperature is cooled and the center is in contact with the storage tank 16, there is no possibility of adhesion to each other.

In addition, since the tube 4 overlaps at the position of the 1st pinch roller 16a, there is no air.

Therefore, the air supplied through the fluid supply passage ejects a relatively sufficient amount at the outlet, but adjusts the air pressure and the amount so that the air is filled in the center of the tube 4 only up to the position of the first pinch roller 16a. .

The vertical size ring 15 is formed by tapering a coolant inlet groove for allowing the coolant to flow into the size hole as the tube 4 passes through the upper end of the size hole.

That is, after mixing the appropriate amount of additives and pigments in the synthetic resin raw material in the extruder (1), and then put it in the hopper and melted at the cylinder temperature 220 ~ 290 ℃ in the extruder (1) to extrude through a circular die, the tube raw material It is discharged vertically toward the ground through the discharge port of the vertical discharge pipe 11 with its own load.

This tube raw material is a hollow tube (4) through which the heated fluid is injected through the fluid supply path connected to the center while passing through the forming path of the tube forming mold (12) and the outer diameter is forcibly expanded. Through this fluid supply path, a high pressure fluid is injected while maintaining a constant pressure toward the center of the tube 4 to maintain the shape of the tube 4 during stretching.

The tube 4 formed through the tube molding mold 12 is heated at a low temperature so that a fluid heated in the heating furnace is injected while passing through a vertical transfer path of the heating unit 13 to have a constant shrinkage rate.

The first pinch installed in the storage tank 16 by completing the primary stretching while the tube 4 passing through the heating part 13 is cooled by the coolant in the coolant tank 14 while passing through the vertical sizing 15. It is conveyed to the secondary vertical drawing means 20 through the roller 16a.

In addition, the tube 4 is cooled by the coolant flowing into the first size hole through the coolant inlet groove while passing through the vertical size ring 15, and the coolant drops along with the vertical transfer of the tube 4 to store the storage tank ( 16) It is preferably stored in a predetermined amount or more and discharged and reused by flowing into the coolant tank 14 by a pump.

Therefore, as described above, the heat-shrinkable tube is automatically conveyed vertically toward the ground by its own load, and thus does not need a separate conveying roller. By vertically acting in the outer diameter of the tube 4 is prevented from crushing or warping, it is possible to be the primary vertical stretching to the tube 4 having a uniform diameter and smooth surface.

Meanwhile, the tube 4 primarily drawn by the vertical drawing means 10 is transferred from the storage tank 16 through the first pinch roller 16a and is positioned at one side thereof to the second vertical drawing water end ( 20).

In the secondary horizontal drawing means 20, the tube 4 conveyed by the guide pinch roller passes through the primary preheater 21 and the secondary preheater 22 so that the outside of the tube 4 passes. After preheating, the main heater 23 is heated to a high temperature to forcibly expand the outer diameter of the tube 4.

At this time, the inside of the tube (4) is filled with air, when the initial operation by drilling the tube (4) to fill the air at the desired pressure and then start the tube at the top and bottom of the secondary vertical stretching means (20) Since the air pressure is maintained between the roll units 27 and 28 that are compressed for transport, air can be continuously filled into the tube 4 without any air supply means.

The primary preheater 21, the secondary preheater 22, and the main heater 23 have a built-in far infrared ceramic heater (H) inside the cylinder to generate a desired temperature by the heat generation of the far infrared ceramic heater (H). It can be maintained.

A plurality of air cooling rings 24 are installed in the lower part of the main heater 23 to eject the cooling air to the outside of the tube 4.

It is preferable that the internal temperature of the primary preheater 21 and the secondary preheater 22 is 120 degreeC.

The main heater 23 is to be expanded to air pressure by forming a tube 4 of the desired diameter by further heating the tube 4 to maintain the internal temperature 130-150 ℃.

As described above, the tube 4 having the outer diameter is forcibly passed through the preheated tube through the primary preheater 21 and the secondary preheater 22, and the main heater 23 passes through the roll unit ( By the pulling operation of 28, the tube 4 is conveyed to the tertiary vertical drawing means 30 in close contact.

The tertiary vertical drawing means 30 is almost similar in configuration to the secondary vertical drawing means 20, but there is only a difference in the temperature of the heater.

That is, the tertiary vertical drawing means 30 is a tube (4) by passing the tube 4, which is transferred to the guide of the guide roll unit 37, first and second through the constant temperature unwinding heater (31) (32). The outer side of this is annealed at constant temperature (about 40-80 degreeC).

The reason for carrying out the constant temperature annealing in the third vertical stretching means 30 is to prevent the dimensional change such as heat shrink of the molded film.

In addition, it maintains a stable state for physical properties, such as antistatic.

At this time, the air inside the tube 4 is filled in the same way as the secondary vertical drawing means 20. During the initial operation, the air is filled through the tube 4 to fill the air at a desired pressure and then roll unit ( Since the air pressure is maintained between the 37 and the transfer winder (3) it is possible to maintain a state filled with air into the tube (4) continuously without any air supply means.

The primary and secondary constant temperature heating heaters 31 and 32 have a far-infrared ceramic heater H built in the cylinder, so that the far-infrared ceramic heater H is heated to maintain a desired temperature.

A plurality of air cooling rings 34 are installed at the lower portion of the lower side constant heating heater 32 to eject the cooling air to the outside of the tube 4.

The tube 4 completed by the tertiary vertical drawing means 30 is conveyed by the above-described transfer winding machine 3 and wound around the winding roller 3a, whereby the tube 4 is wound around the winding roller 3a. It is stretched in the longitudinal direction while being pulled by the winding speed wound on the).

Therefore, the oxygen barrier heat shrink tube is manufactured to have a desired shrinkage in the width direction and the longitudinal direction.

According to the present invention as described above, while acting in the stretching process of the oxygen barrier heat-shrink film while the vertical transfer by the self load of the tube to the self-load of the tube will act only to stretch.

As a result, the tube can be manufactured to have a smooth and uniform surface, thereby reducing the defective rate generated during the manufacture of the tube.

In addition, since the tube is vertically transported by its own load, a separate transport device is unnecessary, thereby reducing equipment costs.

Therefore, the quality control of the manufactured heat shrink tube is easy and the production efficiency can be maximized.

In addition, the dimensions and thickness of the finished product can be continuously formed, such as very useful.

Claims (3)

An extruder 1 for melting and extruding synthetic resin raw materials; A primary drawing machine (10) for forming a raw material extruded by the extruder (1) into a tube shape and drawing the tube 4 in an unstretched state to have a shrinkage ratio required; In what consists of the conveying winding machine 3 which conveys and winds the tube 4 stretched through this primary drawing machine 10; The primary stretching machine 10 is the secondary vertical stretching means 20 for discharging the raw material extruded from the extruder 1 in the vertical direction, and performing the secondary stretching while conveying vertically by its own load; Oxygen barrier shrink film manufacturing apparatus, characterized in that consisting of the third vertical stretching means (30) for the third stretching while conveying the tube (4) stretched vertically again in the second vertical stretching means (20). The method of claim 1, wherein the secondary vertical operation means 20 passes through the primary preheater 21 and the secondary preheater 22 while the air is filled inside the tube 4, so that the outside of the tube 4 is moved. Preheating and heating to a high temperature in the main heater 23 to forcibly expand the outer diameter of the tube 4, a plurality of air cooling ring 24 is installed in the lower portion of the main heater 23 is characterized in that the oxygen Barrier shrink film manufacturing apparatus. The method of claim 1 or 2, wherein the tertiary vertical operation means 30 allows air to be filled into the tube 4, and the tube 4 transferred to the guide of the guide roll unit 37 is Passing the constant temperature unwinding heater (31) (32), the oxygen blocking film shrinkage manufacturing apparatus characterized in that a plurality of air cooling ring (34) is installed in the lower portion of the lower constant temperature unheating heater (32).

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