CN113493018A

CN113493018A - Automatic plastic feeding device for packaging

Info

Publication number: CN113493018A
Application number: CN202110321478.4A
Authority: CN
Inventors: 金成俊; 郑光九
Original assignee: Sanus Technology Co ltd
Current assignee: Sanus Technology Co ltd
Priority date: 2020-04-02
Filing date: 2021-03-25
Publication date: 2021-10-12
Anticipated expiration: 2041-03-25
Also published as: KR102364213B1; CN113493018B; KR20210123442A

Abstract

The invention relates to an automatic plastic feeding device for packaging, which comprises: a plastic supply part for sequentially supplying a plurality of plastic rollers wound with multi-layer plastic in a pipe shape; a plastic arranging part for orderly arranging and bonding the multilayer plastic of the front plastic roller supplied from the plastic supplying part and the multilayer plastic of the back plastic roller supplied from the plastic supplying part; and a packaging unit which transfers the multi-layer plastic supplied through the plastic arranging unit to a predetermined position while keeping the tip end portion of the multi-layer plastic open, and cuts the transferred multi-layer plastic according to the length of a product to be packaged. The invention has the following effects that the plastic is automatically transferred to the product packaging position in an open state, and other plastic roller materials are automatically supplied under the condition that the initially supplied plastic roller material is exhausted, thereby greatly improving the operation efficiency and reducing the reject ratio generated in the product packaging.

Description

Automatic plastic feeding device for packaging

Technical Field

The invention relates to an automatic plastic feeding device for packaging. More particularly, the present invention relates to an automatic plastic supply apparatus for packaging which automatically supplies a plurality of layers of plastic to a product in an automated process for the product requiring plastic packaging.

Background

Among products requiring plastic packaging, packaging of materials such as battery plate separation films, which place particular importance on cleanliness management in the product packaging process, requires an operation of not bringing the opened surface of the plastic into contact with the surface of the product, which is a very troublesome operation.

The past plastic packaging was performed in such a way that the inlet portion of the plastic cut in different sizes was opened and the product was put in by a worker divided into a group of 2 persons, with care taken not to bring the product into contact with the opened inner side of the plastic. Such a work has many difficulties in managing the cleanliness of the product or managing the fraction defective.

In order to solve such problems, an automatic plastic packing machine has been developed in the past, in which both side surfaces of a multi-layer plastic are opened by an adsorption pad, and after passing a product through the opened surfaces of the plastic, the product is placed at a predetermined position to complete packing.

However, in the case of using a roll-type multi-layer plastic material, the conventional automatic plastic packing machine is liable to fail to perform the operation of separating the multi-layer plastic material by the suction pad, and the product may not pass through the opened surface of the plastic material due to unstable orientation of the plastic material in the process of transferring the plastic material.

Further, if the supply amount of the plastic material does not satisfy the daily production amount, the manual supply of the plastic material for packaging is too frequent, and therefore, there is a disadvantage that the factory automation efficiency is lowered.

Documents of the prior art

Patent document

Patent document 0001: korean granted patent No. 10-0246447 (1999 12 months and 06 days)

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an automatic plastic supply device for packaging, which automatically transfers plastic to a product packaging position in an opened state and automatically supplies another plastic roll material when the first plastic roll material is exhausted.

In order to achieve the above object, the present invention provides an automatic plastic supply device for packaging, comprising: a plastic supply part for sequentially supplying a plurality of plastic rollers wound with multi-layer plastic in a pipe shape; a plastic arranging part for orderly arranging and bonding the multilayer plastic of the front plastic roller supplied from the plastic supplying part and the multilayer plastic of the back plastic roller supplied from the plastic supplying part; and a packaging unit which transfers the multi-layer plastic supplied through the plastic arranging unit to a predetermined position while keeping the tip end portion of the multi-layer plastic open, and cuts the transferred multi-layer plastic according to the length of a product to be packaged.

In this case, the present invention is characterized in that the plastic supply unit includes: a supply frame provided with a plurality of rotating shafts for mounting the plastic rollers, a fixing rod for fixing a tip portion of the multi-layered plastic unwound from the plastic roller, and a rotating portion for rotating the rotating shafts so as to sequentially supply the plastic rollers; and an elevating unit configured to elevate or lower the supply rack.

The fixing lever may be formed as a cam-shaped lever, and the plastic supplying portion may further include a lever opening and closing portion for switching the fixing lever in a state of fixing the tip portion of the multi-layered plastic to an unfastened state.

In addition, the plastic supplying unit may further include a first transfer roller formed of a pair of rollers engaged with each other, disposed at a rear end of the fixing bar, and configured to transfer the multi-layered plastic inserted into the plastic aligning unit to the plastic aligning unit.

In addition, the present invention is characterized in that the plastic alignment part further includes: an arrangement unit provided with a cutting and pressing section for holding and cutting the multilayer plastic of the preceding plastic roller and the multilayer plastic of the following plastic roller in a state where the multilayer plastic is overlapped with each other, and arranging the end portions of the multilayer plastic in a butt joint manner; and a bonding section for bonding the multilayer plastic by bonding surfaces of the multilayer plastic arranged so that end portions thereof abut against each other.

Further, the present invention is characterized in that the array module further includes: a first fixed pressing part disposed at a front end of the cutting pressing part, for holding the multi-layer plastic of the backward plastic roller transferred from the plastic supplying part; and a second fixed pressing part disposed at a rear end of the cutting pressing part for holding the multi-layer plastic of the preceding plastic roller.

In addition, the plastic alignment unit may further include a transfer unit for transferring the alignment member to a predetermined bonding position of the bonding unit in a state where the multi-layered plastic is held by the first and second fixed pressing units.

Also, the array block may further include a removing part that removes the fragmentary parts of the multi-layered plastic cut by the cutting and pressing part from the array block.

The plastic alignment part may further include a tension adjusting part disposed at a rear end of the pasting part to adjust tension of the multi-layered plastic.

In addition, the present invention is characterized in that the plastic alignment unit further includes a second transfer roller which is composed of a pair of rollers engaged with each other, is disposed at a rear end of the tension adjusting unit, and transfers the multi-layered plastic inserted inside to the packing unit.

Further, the present invention is characterized in that the packaging unit includes: a plastic separating part for spreading the multi-layer plastic transferred from the plastic arranging part and transferring the multi-layer plastic to the rear part; and a clamp for holding the front end of the opened multilayer plastic and transferring the multilayer plastic to a preset position according to the length of a product to be packaged.

In addition, the present invention is characterized in that the plastic separating portion includes: an outer wheel; and an inner ring disposed inside the outer ring with a gap therebetween, wherein the multilayer plastic is expanded by passing through the gap between the outer ring and the inner ring.

In addition, the plastic separating portion may further include a plastic cutting portion disposed at a rear end of the outer ring, and configured to cut the expanded multi-layer plastic by rotating along an outer circumferential surface of the inner ring.

The invention has the following effects that the plastic is automatically transferred to the product packaging position in an open state, and other plastic roller materials are automatically supplied under the condition that the initially supplied plastic roller material is exhausted, thereby greatly improving the operation efficiency and reducing the reject ratio generated in the product packaging.

Drawings

Fig. 1 is a front view schematically showing an automatic plastic supply device for packaging in accordance with a preferred embodiment of the present invention.

Fig. 2 is a plan view schematically showing an automatic supply device for plastic material for packaging according to a preferred embodiment of the present invention.

Fig. 3 is a front view of the plastic supply.

Fig. 4 is a side view of the plastic supply.

Fig. 5 is a front view of the plastic alignment portion.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a view showing a state where the arrangement member of the plastic arrangement portion is moved to the attaching portion.

Fig. 8 is a front view of the packing portion.

Fig. 9 is a cross-sectional view taken along line B-B of fig. 8.

Fig. 10 is an enlarged view of a portion D in fig. 9.

Fig. 11 is a cross-sectional view taken along line C-C of fig. 8.

Description of reference numerals

1:

plastic rollers

2a, 2 b: multilayer plastic

10: automatic plastic feeding device for packaging

100: plastic supply section 110: supply rack

112: rotation shaft 114: fixing rod

116: the rotating portion 120: lifting part

130: lever switch portion 140: first transfer roller

200: plastic alignment portion 202: arrangement assembly

210: first fixed pressing portion 220: second fixed extrusion part

230: cutting the extrusion 240: removal part

250: the transfer section 260: adhesive part

270: tension adjusting portion 280: second transfer roller

290: guide roller

300: the packaging part 310: plastic separation part

312: outer wheels 313, 315: roller

314: the inner wheel 316: plastic cutting part

320: the motor 322: leather belt

330: first guide rail 340: clamp apparatus

342: the clamp arm 344: second guide rail

346: third guide rail

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in the process of assigning reference numerals to the constituent elements in the respective drawings, the same reference numerals are assigned to the same constituent elements as much as possible even when the constituent elements appear in different drawings. In addition, when it is determined that the gist of the present invention may be confused, detailed description thereof will be omitted. Also, although preferred embodiments of the present invention will be described below, the technical idea of the present invention can be implemented by a person having ordinary skill in the art to which the present invention pertains without being limited or restricted by the preferred embodiments.

Fig. 1 is a front view schematically showing an automatic plastic supply device for packaging in accordance with a preferred embodiment of the present invention, and fig. 2 is a plan view schematically showing the automatic plastic supply device for packaging in accordance with the preferred embodiment of the present invention.

The automatic packaging plastic supply device 10 according to the preferred embodiment of the present invention is used to continuously supply

multi-layered plastics

2a, 2b which are in the form of a tube when unfolded and are packaged by putting products inside.

The automatic packaging plastic supply device 10 of the present invention as described above includes: a plastic supply unit 100 for sequentially supplying a plurality of plastic rolls 1 wound with a plurality of layers of

plastic

2a and 2b in the form of a tube; a plastic aligning part 200 for aligning and bonding the multi-layer plastic 2b of the preceding plastic roller 1 supplied from the plastic supplying part 100 and the multi-layer plastic 2a of the succeeding plastic roller 1 supplied thereafter; and a packing unit 300 which transfers the plastic 2a supplied through the plastic arranging unit 200 to a predetermined position while keeping the tip end portion thereof open, and cuts the transferred plastic 2a according to the length of a product to be packed.

Fig. 3 is a front view of the plastic feeder, and fig. 4 is a side view of the plastic feeder.

The plastic supply unit 100 will be described below with reference to fig. 3 and 4.

The plastic supply portion 100 includes: a supply frame 110 which mounts a plurality of plastic rollers 1 and supplies the mounted plastic rollers 1 in order; and an elevating part 120 for adjusting the height of the supply frame 110.

Specifically, a plurality of rotating shafts 112 are provided at the supply frame 110 for mounting the plastic rollers 1. The rotating shaft 112 is provided with a motor for inducing the plastic roll 1 to rotate smoothly when the

multi-layered plastics

2a, 2b wound around the plastic roll 1 are unwound.

The supply frame 110 is provided with a fixing lever 114 for fixing the tip end portion of the multilayer plastic 2a unwound from the plastic roller 1.

The fixing lever 114 may be formed as a cam-shaped lever, and the front end of the multi-layered plastic 2a is engaged with or released from the fixing by a portion of the fixing lever 114 according to the opening and closing operation of the fixing lever 114.

The supply frame 110 is provided with a sensor for detecting the amount of the multilayer plastic 2a of the plastic roller 1 attached to each rotating shaft 112, and it is possible to confirm whether or not the multilayer plastic 2a of the plastic roller 1 in the supplied state is consumed.

The supply frame 110 is provided with a rotating unit 116 for rotating the plurality of rotating shafts 112 so as to sequentially supply the plastic rollers 1.

The elevating part 120 may be implemented as an elevating device such as a ball screw and a linear motion Guide (LM Guide) unit, and may move the supply frame 110 connected to the ball screw in the vertical direction of the linear motion Guide unit. The elevating unit 120 may be realized by other known devices.

The plastic supplying section 100 further includes a lever switch section 130 which is disposed above the fixing lever 114 at the supplying position and switches the fixing lever 114 in a state of fixing the front end portion of the multi-layer plastic 2a to an unfastened state.

The rod opening and closing part 130 may be composed of a pneumatic cylinder and a roller connected to the pneumatic cylinder and lifted. Such a lever switching part 130 may be capable of supplying the multi-layered plastic 2a by contacting the fixing lever 114 at the time of a descending motion and converting the fixing lever 114 in a fixed state into an unlocked state.

The plastic supply unit 100 includes a first transfer roller 140 disposed at the rear end of the fixing lever 114, and transfers the multi-layer plastic 2a to the plastic alignment unit 200, which is a subsequent process.

The first transfer roller 140 is composed of a pair of rollers arranged in the vertical direction and engaged with each other, and the upper roller is connected to a pneumatic cylinder to perform an up-and-down operation.

The rollers of the first transfer roller 140 are rotatably connected to a motor or the like, and the multi-layer plastic 2a inserted between the rollers can be transferred to the plastic alignment unit 200 as a subsequent step.

Fig. 5 is a front view of the plastic alignment part, fig. 6 is an enlarged view of a portion a of fig. 5, and fig. 7 is a view illustrating a state in which an alignment member of the plastic alignment part is moved to the attaching part.

Hereinafter, the plastic alignment portion 200 will be described with reference to fig. 5 to 7.

The plastic alignment unit 200 is constituted by an alignment unit 202, a bonding unit 260, and the like, wherein the alignment unit 202 is aligned so that the end portions of the plural layers of plastic 2b of the preceding plastic roll 1 supplied first and the plural layers of plastic 2a of the succeeding plastic roll 1 supplied later abut against each other, and the bonding unit 260 connects the aligned plural layers of

plastic

2a, 2 b.

Specifically, the ranking component 202 includes: a first fixed pressing unit 210 for holding the multi-layer plastic 2a of the succeeding plastic roll 1 transferred from the plastic supply unit 100 by the first transfer roll 140; a second fixed pressing part 220 disposed at the rear end of the cutting pressing part 230, and holding the multi-layer plastic 2b of the preceding plastic roller 1; and a cutting and squeezing unit 230 that grips and cuts the multiple layers of

plastic

2a, 2b of the preceding plastic roller 1 in a state where the multiple layers of plastic 2b of the succeeding plastic roller 1 overlap with the multiple layers of plastic 2a of the succeeding plastic roller 1.

The first fixed pressing portion 210 and the second fixed pressing portion 220 are lifted by a pneumatic cylinder, and are configured as a pad-shaped structure that holds the

multilayer plastics

2a and 2b when they are lowered.

The cutting and pressing unit 230 is also configured to be moved up and down by a pneumatic cylinder, and as shown in fig. 6, two pressing pads press and fix the

multi-layer plastics

2a and 2b in a state where the

multi-layer plastics

2a and 2b are overlapped, and the

multi-layer plastics

2a and 2b are cut by a cutting tool such as a blade between the pressing pads.

The array assembly 202 may further include a removing part 240 that removes the fragmentary parts of the

multi-layered plastics

2a, 2b cut by the cutting and pressing part 230 from the array assembly 202.

In this case, the removing unit 240 may be provided with an adsorption device using air pressure. The fragmentary parts of the

multi-layered plastics

2a, 2b adsorbed by the removing part 240 are separated into individual loading boxes (not shown).

On the other hand, the plastic alignment unit 200 includes a transfer unit 250 that transfers the alignment member 202 to a predetermined bonding position of the bonding unit 260 in a state where the plurality of layers of

plastic

2a and 2b are gripped by the first fixing and pressing unit 210 and the second fixing and pressing unit 220.

As shown in fig. 7, after the

multi-layered plastics

2a, 2b are cut and aligned by the cutting and pressing unit 230 and the fragmentary parts are removed by the removing unit 240, the aligned portion of the

multi-layered plastics

2a, 2b is transferred to a predetermined position of the attaching unit 260.

The sticking portion 260 joins the

multi-layer plastics

2a, 2b by sticking the surfaces of the

multi-layer plastics

2a, 2b arranged so that the end portions abut against each other, thereby connecting the multi-layer plastic 2b supplied first and the multi-layer plastic 2a supplied subsequently.

In this way, the multiple layers 2a of plastic material of the subsequently fed plastic roll 1 can be continuously fed after the previously fed plastic roll 1 has been completely depleted.

The plastic array 200 may further include: a tension adjusting section 270 disposed at the rear end of the attaching section 260 for adjusting the tension of the

multilayer plastics

2a, 2 b; a second transfer roller 280 disposed at a rear end of the tension adjusting portion 270 for transferring the

multi-layered plastics

2a, 2b inserted inside to the packing portion 300; and a guide roller 290 disposed at the rear end of the second transfer roller 280, for guiding the overlapped

multi-layer plastics

2a, 2b to spread smoothly.

As shown in fig. 5, the tension adjusting unit 270 may include a roller that moves up and down along the ball screw, and the tension of the

multi-layered plastic

2a and 2b passing around the roller is adjusted by the movement of the roller.

In this case, a plurality of sensors for detecting the tension of the transferred

multi-layered plastics

2a and 2b may be provided in the plastic alignment portion 200, and the tension adjusting portion 270 may be controlled to be raised or lowered according to the degree of the detected tension.

The second transfer roller 280 is configured in the same manner as the first transfer roller 140 described above, and moves the

multilayer plastics

2a and 2 b.

Fig. 8 is a front view of the packing part, fig. 9 is a sectional view taken along line B-B of fig. 8, fig. 10 is an enlarged view of portion D of fig. 9, and fig. 11 is a sectional view taken along line C-C of fig. 8.

The packing unit 300 will be described below with reference to fig. 8 to 11.

The packing part 300 includes: a plastic separating part 310 for spreading the multi-layer plastic 2a transferred from the plastic arranging part 200 and transferring the plastic backward; and a clamp 340 for holding the front end of the opened multi-layer plastic 2a and transferring the multi-layer plastic 2a to a predetermined position according to the length of the product to be packaged.

Specifically, as shown in fig. 9, the plastic separating portion 310 has a circular frame shape formed by an outer ring 312 and an inner ring 314.

In this case, the inner ring 314 is disposed inside the outer ring 312 with a gap from the outer ring 312, and the multilayer plastic 2a is spread in a tube shape through the gap between the outer ring 312 and the inner ring 314.

As shown in fig. 10, a plurality of

rollers

313 and 315 are provided on the outer wheel 312 and the inner wheel 314, respectively, and the outer wheel 312 and the inner wheel 314 are connected by these

rollers

313 and 315.

Although not shown, the inner ring 314 may be disposed inside the outer ring 312 by a magnetic field.

The plastic separating portion 310 further includes a plastic cutting portion 316 disposed at the rear end of the outer ring 312 and configured to cut the expanded multi-layer plastic 2a by rotating along the outer circumferential surface of the inner ring 314.

The plastic cutting portion 316 has a circular frame and a cutting tool (not shown) for cutting the multi-layer plastic 2a is mounted inside the frame. Such a plastic cutting portion 316 receives a driving force from the motor 320 through the belt 322 to rotate, and at the same time, the cutting tool cuts the multi-layered plastic 2 a.

The plastic cutting portion 316 is configured to be movable forward and backward along the first guide rail 330, so that a cutting portion of the multi-layer plastic 2a can be selected according to the length of the product.

The clamp 340 is formed to move linearly by a cylinder, and a portion contacting the multi-layer plastic 2a is formed of a soft gasket to prevent the multi-layer plastic 2a from being damaged.

The gripper 340 is connected to a gripper arm 342, and the gripper arm 342 is configured to be movable forward and backward along the second guide rail.

Also, the gripper arms 342 can be laterally moved along the third guide rails 346, so that multi-layered plastics 2a having various diameters can be applied to product packages.

In the following, a packaging process of the automatic plastic supply device 10 for packaging according to the preferred embodiment of the present invention will be described, in which first, the operator attaches the plurality of plastic rollers 1 to the rotating shaft 112 and fixes the tips of the multi-layer plastic 2a to the fixing bars 114. In this case, the fixing lever 114 for fixing the multi-layer plastic 2b of the plastic roller 1 supplied first is opened.

Next, the leading end of the multi-layer plastic 2b of the plastic roll 1 supplied first is passed through the plastic aligning unit 200 and the plastic separating unit 310 of the packing unit 300, and the multi-layer plastic 2b is supplied to the jig 340 located in front of the plastic separating unit 310.

Although the operator manually performs the above-described operation for the first operation, the subsequent steps are automatically performed.

The clamp 340 holds the front end of the multi-layer plastic 2b and moves backward to pull the multi-layer plastic 2b, and at the same time, the plastic separating portion 310 also moves to the cutting position of the multi-layer plastic 2b according to the length of the product. In this case, the clamp 340 and the plastic separating portion 310 are moved to the cutting position of the multi-layered plastic 2b with reference to the midpoint of the product to be packaged.

When the plastic separating portion 310 is disposed at the cutting position of the multi-layer plastic 2b, the plastic cutting portion 316 will cut the multi-layer plastic 2 b. In this case, the multi-layered plastic 2b is cut behind the outer wheel 312, so that the multi-layered plastic 2b after being cut enables the front end thereof to be easily held by the gripper 340.

When the first plastic roll 1 supplied is exhausted after repeating the above-described steps, the plurality of sensors detect this, and then the supply frame 110 can be rotated based on the signals of the sensors so as to supply a new plastic roll 1.

In this case, the second transfer roller 280 and the jig 340 stop operating, the rear end of the multi-layer plastic 2b supplied first stays between the cutting and pressing part 230 and the first fixed pressing part 210, and the multi-layer plastic 2b supplied first is fixed by lowering the second fixed pressing part 220.

When a new plastic roll 1 is supplied to the supply position by rotating the supply frame 110, the fixing lever 114 is switched to the open position by lowering the lever switch portion 130, and the multi-layered plastic 2a of the new plastic roll 1 is transferred to the cutting and pressing portion 230 of the plastic alignment portion 200 by lowering the first transfer roller 140.

The new multi-layer plastic 2a transferred to the cutting and pressing part 230 is overlapped with the upper part of the multi-layer plastic 2b supplied previously.

Thereafter, the multi-layered plastic 2b supplied subsequently is fixed by lowering the first fixing and pressing part 210, and then the multi-layered plastic 2b supplied first and the multi-layered plastic 2a supplied newly are simultaneously cut by also lowering the cutting and pressing part 230. In this way, the ends of the

multi-layer plastic

2a, 2b will be arranged in a butt-jointed state.

In this state, the cutting and pressing portion 230 is raised again, and the fragmentary portions of the

multi-layered plastics

2a, 2b are removed by the removing portion 240.

In a state where the plurality of

plastic layers

2a and 2b are aligned, the aligning unit 202 is moved to the adhering position of the adhering portion 260, and the adhering portion 260 adheres the upper and lower surfaces of the plurality of

plastic layers

2a and 2b to be butted to each other, thereby realizing connection.

After the

multi-layer plastics

2a, 2b are bonded, the first fixed pressing part 210 and the second fixed pressing part 220 are lifted again, the second transfer roller 280 and the jig 340 are operated again, and the jig 340 pulls the tip end part of the multi-layer plastics 2b supplied earlier to pass the bonded part through the plastic cutting part 316.

Thereafter, the plastic cutting portion 316 cuts the newly supplied multi-layer plastic 2a, and the previously supplied multi-layer plastic 2b including the adhered portion is discarded. In this way, the portion to be adhered can be prevented from being used for product packaging.

The jig 340 repeatedly grips the multi-layer plastic 2a and moves the same in a state where the stuck portion is removed and the tip of the newly supplied multi-layer plastic 2a passes through the plastic separating portion 310, thereby performing a product packaging process.

As described above, the automatic plastic supply apparatus 10 for packaging according to the preferred embodiment of the present invention automatically supplies a plurality of plastic rolls 1 in sequence, so that it is possible to reduce the frequency of direct manual supply by an operator, and to greatly improve the efficiency of an automated facility, and thus the present invention is very useful.

The above description is merely exemplary in nature and is intended to illustrate the technical idea of the present invention, and those skilled in the art to which the present invention pertains can make various modifications, alterations, and substitutions without departing from the essential characteristics of the invention. Therefore, the embodiments and drawings disclosed in the present invention are for explaining the technical idea of the present invention, not for limiting the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited to these embodiments and drawings. The scope of the invention should be construed as being indicated by the appended claims, and all technical equivalents thereto should be interpreted as being included in the scope of the claims.

Claims

1. An automatic plastic supply device for packaging, comprising:

a plastic supply part for sequentially supplying a plurality of plastic rollers wound with multi-layer plastic in a pipe shape;

a plastic arranging part for orderly arranging and bonding the multilayer plastic of the front plastic roller supplied from the plastic supplying part and the multilayer plastic of the back plastic roller supplied from the plastic supplying part; and

and a packing unit which transfers the multi-layer plastic supplied through the plastic arranging unit to a predetermined position while keeping the tip end portion of the multi-layer plastic open, and cuts the transferred multi-layer plastic according to the length of a product to be packed.

2. An automatic plastic material feeding device for packaging as claimed in claim 1, wherein said plastic material feeding part comprises:

a supply frame provided with a plurality of rotating shafts for mounting the plastic rollers, a fixing rod for fixing a tip portion of the multi-layered plastic unwound from the plastic roller, and a rotating portion for rotating the rotating shafts so as to sequentially supply the plastic rollers; and

and an elevating part for elevating or lowering the supply rack.

3. An automatic supply device of plastic material for package according to claim 2,

the fixing lever is formed as a cam-shaped lever,

the plastic supply part further includes a lever switch part for switching the fixing lever in a state of fixing the front end part of the multi-layered plastic to an unfastened state.

4. The automatic plastic supply device for packaging as claimed in claim 3, wherein said plastic supply portion further comprises a first transfer roller, which is composed of a pair of rollers engaged with each other, disposed at a rear end of said fixed bar, for transferring said multi-layered plastic inserted inside to said plastic arrangement portion.

5. The automatic plastic material feeding device for packaging as claimed in claim 1, wherein said plastic material arranging portion comprises:

an arrangement unit provided with a cutting and pressing section for holding and cutting the multilayer plastic of the preceding plastic roller and the multilayer plastic of the following plastic roller in a state where the multilayer plastic is overlapped with each other, and arranging the end portions of the multilayer plastic in a butt joint manner; and

and a bonding section for bonding the multi-layer plastic by bonding surfaces of the multi-layer plastic arranged so that end portions thereof abut against each other.

6. An automatic packaging plastic material supply device as claimed in claim 5, wherein said aligning assembly further comprises:

a first fixed pressing part disposed at a front end of the cutting pressing part, for holding the multi-layer plastic of the backward plastic roller transferred from the plastic supplying part; and

and a second fixed pressing part disposed at a rear end of the cutting pressing part for holding the multi-layer plastic of the preceding plastic roller.

7. The automatic plastic supply device for packaging as claimed in claim 6, wherein the plastic alignment portion further includes a transfer portion for transferring the alignment member to a predetermined bonding position of the bonding portion in a state where the multi-layered plastic is held by the first and second fixed pressing portions.

8. The automatic plastic feeding device for package as claimed in claim 6, wherein said aligning member further comprises a removing portion for removing the fragmentary portion of said multi-layered plastic cut by said cutting-pressing portion from said aligning member.

9. The automatic packaging plastic feeding device of claim 5, wherein the plastic aligning portion further comprises a tension adjusting portion disposed at a rear end of the adhering portion for adjusting tension of the multilayer plastic.

10. The automatic plastic supply device for packaging as claimed in claim 9, wherein the plastic alignment portion further includes a second transfer roller, which is composed of a pair of rollers engaged with each other, disposed at a rear end of the tension adjusting portion, for transferring the multi-layered plastic inserted inside to the packaging portion.

11. The automatic packaging plastic material supply device according to claim 1, wherein the packaging unit includes:

a plastic separating part for spreading the multi-layer plastic transferred from the plastic arranging part and transferring the multi-layer plastic to the rear part; and

and a clamp for holding the front end of the opened multilayer plastic and transferring the multilayer plastic to a preset position according to the length of the product to be packaged.

12. An automatic supply device of packaging plastic according to claim 11,

the plastic separating part includes:

an outer wheel; and

an inner ring disposed inside the outer ring with a gap therebetween,

the multi-layer plastic is opened through the gap between the outer wheel and the inner wheel.

13. The automatic packaging plastic feeding device as claimed in claim 12, wherein the plastic separating portion further includes a plastic cutting portion disposed at a rear end of the outer ring and configured to cut the opened plastic layers by rotating along an outer circumferential surface of the inner ring.