KR102054114B1 - Manufacturing apparatus of paper straw - Google Patents

Abstract

The present invention relates to a paper straw manufacturing device which can manufacture paper straws continuously due to a relative simple structure of rolling stencil paper withdrawn from a stencil paper roll as a cylindrical shape, and overlapping and bonding the same linearly to cut the stencil paper by a predetermined length, greatly increase productivity and properly perform bonding of a bonding unit since the bonding unit is linearly formed; and to a paper straw manufactured thereby. According to one desirable embodiment of the present invention, the paper straw manufacturing device comprises: a main body; a stencil paper roll which is held to rotate on a lower part of the main body and is rolled as a roll shape; slitting roller pairs which is installed in one side of the stencil paper roll and cuts the stencil paper withdrawn from the stencil paper roll by a predetermined width of stencil paper strip; a preliminary molding unit which is installed in one side of an upper part of the main body and molds the stencil paper strip to be downwardly curved; a cylindrical molding unit which is installed in a center of the upper part of the main body and molds the stencil paper strip preliminarily molded by the preliminary molding unit as a cylindrical stencil paper tube; a heating bonding unit which is arranged in an upper side of the cylindrical molding unit, and heats and bonds a linear-type overlapped portion of the stencil paper tube molded as a cylinder shape; and a cutting discharging unit which is installed in the other side of the upper part of the main body and cuts the stencil paper tube having the linear-type overlapped portion bonded thereto by a predetermined length while conveying the same. In addition, the paper straw according to one desirable embodiment of the present invention adopts paper as stencil paper to have a linear type overlapped portion.

Description

Paper straw manufacturing apparatus and paper straw manufactured by it {MANUFACTURING APPARATUS OF PAPER STRAW}

The present invention relates to a paper straw manufacturing apparatus for continuously producing a paper straw from a paper roll wound in the form of a roll, and a paper straw produced thereby.

Recently, as the problem of environmental pollution due to microplastics has been raised, a lot of attempts and studies to reduce the use of disposable plastic products have been made.

In line with this trend, stainless steel straws, bamboo straws, silicone straws, paper straws, etc. have been spotlighted as alternatives to plastic straws, which are conventionally used for drinking drinks such as milk, juice, coffee, and the like. In particular, the demand for paper straw is increasing with the introduction of Starbucks, a multinational company.

Meanwhile, the paper straw is manufactured through a modification of the conventional paper pipe manufacturing apparatus, and as an example of such a paper pipe manufacturing apparatus or a manufacturing method, it is cut to a predetermined width in Korean Patent Publication No. 10-1996-0033728 (published on October 22, 1996). The paper winding step of laminating the old paper to the outer circumferential surface of the rotating core with an adhesive while gluing it with an adhesive, and the stepped portion formed by laminating the paper of the first paper tube wound with the paper with a belt grinder to make the surface of the first paper tube uniform. A surface grinding step, a surface paper winding step of adhesively winding the surface paper chamfered at both ends to the outer circumferential surface of the primary paper tube, and a paper tube bonded to the surface paper are put into a drying furnace for a predetermined time to dry the adhesive in a short time. An artificial drying step and wax are applied to the outer circumferential surface of the paper tube on which the surface paper is wound, while rotating between the upper and lower rotating rollers. Wax coating step to extrude, wax-coated paper pipe is extruded through the through-hole of extrusion die of predetermined diameter to make the outer diameter of paper pipe uniformly and improve the surface roughness, and the external diameter by extrusion Is a cutting step of cutting the paper tube formed by a predetermined length by a rotary cutter, and a polishing step of smoothing both ends by polishing both ends of the paper pipe cut to a predetermined length with a rotary support is disclosed.

In addition, Korean Patent Publication No. 10-2013-0003208 (published Jan. 9, 2013) discloses a pair of drums vertically installed on the upper surface of the housing so as to be rotatable, drive shafts formed to be formed under both drums, and both drums. The core pipe is formed horizontally so as to be idling and forms a paper pipe by winding a paper strip on the outer surface, a plurality of paper bands supplied to be wound spirally on the core pipe, and are connected in an eight shape between the drums, and one hem is connected. A belt that rotates the core tube in a spirally wound state on the outer surface of the core tube, an electric motor which is individually vertically installed at the lower ends of the drive shafts of both drums, a chain gear installed in the middle of both drive shafts, and an idling chain gear in the center of the chain Gears at the bottom of both idle chain gears mesh with each other to allow both drums to rotate at the same speed. The synchronizer and a spiral tube winding machine for the production, characterized in that comprising a controller for controlling the control electrical signal of the both the electric motor is started.

In addition, U.S. Patent No. 3,291,009 (Dec. 13, 1966) discloses a heat-bonding process in which a cellophane strip loaded on a supply roll is drawn out, spirally wound on an arbor, and spirally wound on a cellophane strip with a belt. Disclosed is a beverage straw manufacturing apparatus.

In the beverage straw manufacturing apparatus, due to the structural problems of the spiral overlap, the spiral overlap of the straw collapses or in particular, the cellophane strip, which is a synthetic resin, is spirally wound around the small diameter shaft by a belt, and the cellophane strip adheres to the small diameter shaft by heat. In order to solve the problem of a drinking straw having a spiral overlapping portion that is not formed accurately, there is disclosed a configuration of forming a knurling on the small diameter axis to minimize the contact area between the cellophane strip and the small diameter axis,

However, in the case of the conventional straw manufacturing politics as described above, due to the configuration in which paper straws are manufactured by spirally winding a plurality of paper strips, the overall apparatus is not only complicated, but also the productivity is lowered. There was a problem that could not be properly bonded.

1. Republic of Korea Patent Publication No. 10-1996-0033728 (Published October 22, 1996) 2. Republic of Korea Patent Publication No. 10-2013-0009246 (published Jan. 23, 2013) 3. U.S. Patent No. 3,291,009 (Dec. 13, 1966)

Therefore, the present invention has been made in order to solve the above-mentioned problems of the prior art, the paper straw can be continuously manufactured by a relatively simple structure that rolls the paper drawn out from the paper roll in a cylindrical shape and overlaps it in a straight line to cut it to a certain length. The productivity can be greatly increased, and as the joints are formed in a straight line, the joints of the joints are improved, and the paper straw manufacturing apparatus in which the paper base paper does not stick to the molding bar is provided.

The object of the present invention described above is a main paper, a paper roll rotatably mounted at a lower portion of the main body and wound in a cost roll form, and a paper sheet provided on one side of the paper roll and drawn out from the paper roll. A pair of slitting rollers cut into strips, a preforming unit installed at an upper side of the main body to bend the paper strip downward, and a preformed unit installed at an upper center side of the main body and preformed by the preforming unit A cylindrical molding unit for forming a strip of paper into a cylindrical tube of cylindrical shape, a heat-junction unit for heating and joining the linear overlapping portion of the cylindrical tube formed on the cylindrical shape of the cylindrical tube and formed on top of the cylindrical molding unit; A cutting and discharging unit installed at the other side and cutting the raw tube with a straight line overlapping portion at the same time as the feeding tube Tooth for is achieved by a manufacturing device to provide.

According to a preferred feature of the present invention, the preforming unit, the lower projection and the outer projection is formed on the upper one side of the main body is formed to be rotatable at regular intervals and the forming groove having a semi-circular cross section on the outer circumferential surface having a semi-circular cross section on the molding A plurality of preformed feed roller pairs formed by an upper roller formed with a plurality of preformed rollers to bend downward at the same time as the transfer strip, and provided between the lower rollers of the preformed feed roller pair and provided below the preformed feed roller pair. Protruding to include a first heating forming member for heating the lower side of the base tube.

According to a preferred feature of the present invention, the preforming unit further comprises a transmission structure for rotating and driving a plurality of preforming feed roller pairs at the same time, the transmission structure is a first gear and each provided on the shaft of the plurality of lower rollers and , A first gear belt surrounding the first gears of the plurality of lower rollers as a whole, a second gear provided respectively on the shafts of the plurality of upper rollers, and a second gear belt surrounding the second gears of the plurality of upper rollers as a whole. And a drive gear belt for rotating one of the shafts of the plurality of lower rollers, and a pair of electric gears additionally installed on the shafts of the upper and lower rollers forming one of the preformed roller pairs.

According to a preferred feature of the present invention, the cylindrical forming unit is formed on one end is supported so as to horizontally extend in a straight line on the upper center side of the main body, the upper and lower parts of the molding bar is installed to be rotatable at regular intervals and the outer peripheral surface A plurality of cylindrical forming roller pairs formed of upper and lower rollers having a forming groove having a semi-circular cross section and being curved to the outer circumference of the forming rod material at the same time as conveying the paper strip and forming into cylindrical tube tubes; And a second heating molding member provided below the cylindrical feed roller pair and protruding between the lower rollers of the cylindrical feed roller pair to heat the lower side of the base tube.

According to a preferred feature of the present invention, the heat bonding unit is provided on the upper side of the cylindrical feed roller pair and protrudes between the upper rollers of the cylindrical feed roller pair is formed as a heater for heating the linear overlapping portion of the base tube.

According to a preferred feature of the invention, the cutting discharge unit is a plurality of feed roller pairs for conveying the cylindrical tube in the discharge direction, and the paper straw of a certain length while rotating the cylindrical tube while rotating every predetermined time It includes a cutting roller pair for cutting with.

According to a preferred feature of the present invention, one surface of the base paper is laminated with a waterproof coating layer and the other surface of the base paper is laminated with a heat bonding coating layer bonded to the waterproof coating layer when heated.

Moreover, the subject of this invention mentioned above is achieved by the paper straw manufactured by said paper straw manufacturing apparatus.

According to the apparatus for manufacturing a paper straw according to the present invention, a plurality of paper strips are wound in a spiral to break away from the conventional structure in which paper straws are manufactured. As the paper straw can be continuously manufactured by a relatively simple structure, there is an advantage that the productivity can be greatly increased.

In addition, according to the paper straw manufacturing apparatus according to the present invention, there is an advantage that the bonding portion can be properly made with a constant bonding strength, as the bonding portion is formed in a straight line of a relatively short length rather than a spiral of a relatively long length.

In addition, according to the paper straw manufacturing apparatus according to the present invention, there is an advantage that the paper base paper does not stick to the molding rod material when the cylindrical straw is manufactured by adopting the paper base paper.

1 is an overall structure diagram of a paper straw manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a paper straw manufacturing apparatus according to an embodiment of the present invention, a detailed structure of the preforming unit.
3 is a detailed structural diagram of a transmission structure of the preforming unit in the paper straw manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a paper straw manufacturing apparatus according to an embodiment of the present invention, a detailed structural diagram of the cylindrical forming unit and the heat bonding unit.
5 is a comparative view of a straw having a conventional paper-shaped straw manufactured by a paper straw manufacturing apparatus according to an embodiment of the present invention having a straight joint and a spiral overlapping portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this is only to describe in detail enough to be able to easily carry out the invention by those skilled in the art, which does not mean that the technical spirit and scope of the present invention is limited.

1 is an overall structure diagram of a paper straw manufacturing apparatus according to an embodiment of the present invention.

Paper straw manufacturing apparatus 1 according to an embodiment of the present invention, as shown in Figure 1, is rotatably mounted to the main body 10, the lower portion of the main body 10 and the paper (A) in the form of a roll Pair of slitting rollers 30, which are installed on one side of the paper roll 20 to be wound and the paper roll 20, which are drawn out from the paper roll 20, are cut into a paper strip B of a predetermined width. And a preforming unit 40 installed on one side of the upper body of the main body 10 to bend down the paper strip B, and a preforming unit 40 installed on the upper center side of the main body 10. A cylindrical molding unit 50 for molding the preformed paper strip B into a cylindrical paper tube C, and a cylindrical tube C arranged on the upper side of the cylindrical molding unit 50 and formed into a cylindrical shape. The heat-bonding unit 60 for heating and joining the linear overlapping portion, and the base tube C provided on the other side of the upper part of the main body 10 and bonded with the linear overlapping portion. Cutting and discharging unit 70 for cutting to a certain length at the same time to transfer.

Here, the main body 10 is to form a frame of the paper straw manufacturing apparatus according to an embodiment of the present invention, a paper roll 20, a slitting roller pair 30, a preforming unit 40, which will be described later While forming the mounting base of the cylindrical molding unit 50, the heat-junction unit 60 and the cutting discharge unit 70, the drive motor (not shown) for their operation and the controller (not shown) for control thereof Form the mount.

On the lower side of the body 10 described above, the paper roll 20 is rotatably mounted. The paper roll 20 is a paper (A) used for the manufacture of the paper straw (3) is wound in the form of a roll, it is mounted on the lower side of the main body 10 in the form of a roll provided with a cylindrical core material replaceably .

The paper roll 20 is a wide cardboard, withdraw the cardboard from the cardboard roll wound in roll formation, and at the same time coating the entire waterproof coating layer on one side of the cardboard and the entire heat-bonding coating layer on the other side of the cardboard, the paper straw The paper (A) slit to a width suitable for the production of (3) is preliminarily produced through a process of winding up again in a roll form.

The slitting roller pair 30 is installed on one side of the paper roll 20 on the main body 10 described above. The slitting roller pair 30 cuts both edges of the paper A so that the paper A drawn out from the paper roll 20 is discharged to the paper strip B of a predetermined width suitable for manufacturing the paper straw 3. It is a constituent member.

The slitting roller pair 30 is a slitting roller having a known structure that cuts both edges of the base paper A introduced between the rollers while the slitting roller having a cutting blade formed on the outer circumferential surface of the support roller is rotated while being pressed in close contact. It can be formed as a pairing roller.

A guide roller 31 for guiding the base paper A to the slitting roller pair 30 is provided upstream of the slitting roller pair 30 with respect to the conveying direction of the base paper A. Downwards of the slitting roller pair 30 with respect to the conveying direction, a plurality of tension rolls 33 for guiding the paper strip B to the preforming unit 40 are installed.

The preforming unit 40 is installed on one side of the upper portion of the body 10 described above.

The preforming unit 40 is formed to bend downward before forming the paper strip (B) into a cylindrical shape, as shown in Figure 2, the rotary drive at a predetermined interval on the upper side of the main body 10 It is composed of a lower roller 41 'which is installed as possible and has a forming groove 41a having a semicircular cross section on the outer circumferential surface and an upper roller 41 "having a forming protrusion 41b having a semicircular cross section on the outer circumferential surface. B) a plurality of preforming feed roller pairs 41 which are pre-formed to be bent downward at the same time as the feed, and the lower rollers 41 of the preformed feed roller pairs 41 which are provided below the preformed feed roller pairs 41. It includes a first heating forming member 43 protruding between ') to heat the lower side of the base tube (C).

In addition, the preforming unit 40 further includes a transmission structure 45 for rotating the plurality of preforming feed roller pair 41 at the same time. As shown in FIG. 3, the transmission structure 45 includes a first gear 45a provided on each of the shafts of the plurality of lower rollers 41 ', and a first gear 45a of the plurality of lower rollers 41'. ), The first gear belt 45b surrounding the entire body, the second gear 45c respectively provided on the shafts of the plurality of upper rollers 41 ", and the second gear 45c of the plurality of upper rollers 41". Shaft of one of the second gear belt (45d), the drive gear belt (45e) for rotationally driving one of the shafts of the plurality of lower rollers (41 ') and the preformed feed roller pair (41) It includes an electric gear pair (45f) installed in addition.

Therefore, as the drive gear (not shown) is rotated and driven, the drive gear belt 45e is rotated by an electric structure by an electric belt (not shown), thereby rotating one of the axes of the plurality of lower rollers 41 '. As the first gear belt 45b is rotated, the plurality of lower rollers 41 'are driven to rotate in the conveying direction of the paper strip B, and one of the lower rollers 41' is driven by the electric gear pair 45f. While the rotational force of the shaft of the upper roller 41 "is transmitted to one of the shafts of the second gear belt (45d) while the plurality of upper rollers (41") is driven to rotate in the conveying direction of the paper strip (B).

The plurality of preformed feed roller pairs 41 are rotated by the transmission structure 45 at the same time, so that the strip strip B is moved and at the same time the lower roller 41 'and the forming protrusions are formed. 41b) is preformed to be bent downward by the combination of the upper roller 41 "to be formed, and is thermally deformed to be preformed to bend downward while being heated by the first heating molding member 43.

Cylindrical forming unit 50 and the heat-junction unit 60 are installed at the upper center side of the above-described main body 10.

Cylindrical molding unit 50 is to mold the strip strip (B) pre-formed by the preforming unit 40 into a cylindrical tube (C), as shown in Figure 4, Molding rods 51 having one end supported so as to extend horizontally in a straight line on the upper center side, and forming grooves 53a having a semicircular cross section on the outer circumferential surface of the molding rods 51 are installed to be rotatable at regular intervals. It consists of upper and lower rollers (53 ', 53 ") and the cylindrical strip (B) and a plurality of cylindrical moldings to be formed into a cylindrical tube (C) by bending at the outer circumference of the molding bar (51) at the same time as the transfer It is provided on the lower side of the feed roller pair 53 and the cylindrical feed roller pair 53 and protrudes between the lower roller 53 "of the cylindrical feed roller pair 53 to heat the lower side of the base tube (C). 2 includes a heating forming member (55).

One end of the molded bar material 51 is supported and fixed to the support member 51a fixedly installed at the center side of the main body 10. In addition, as the forming groove 53a having a semi-circular cross section is formed around the outer circumference of the upper and lower rollers 53 'and 53 "forming the cylindrical feed roller pair 53, it is bent downwardly by the preforming unit 40. The preformed paper strip (B) is molded to have a cylindrical shape along the outer circumference of the molding bar (51) to form a linear overlapping portion at the top.

In addition, the second heating molding member 55 heats the lower side of the base tube C superimposed cylindrically around the outer circumference of the molding bar 51 to maintain the thermal deformation state.

Since the transmission structure for the simultaneous rotational drive of the cylindrical feed roller pair 53 of the cylindrical forming unit 50 can be implemented in the same manner as the transmission structure 45 of the preforming unit 40, it is further described here for the sake of simplicity of the specification. The above detailed description will be omitted.

On the upper side of the above-mentioned cylindrical molding unit 50, a heat bonding unit 60 is installed. The heat-bonding unit 60 heats and joins the linear overlapping portion of the base tube C formed into a cylindrical shape by the cylindrical molding unit 50, and as shown in FIG. 4, the cylindrical molding unit 50. It can be formed as a heater provided on the upper side of the cylindrical feed roller pair (53) of the protruding between the upper rollers 53 'of the cylindrical feed roller pair (53) to heat the linear overlapping portion of the base tube (C).

In addition, the heat bonding unit 60 heats the upper side of the base tube (C) superimposed in a cylindrical shape around the outer circumference of the molding bar 51 to maintain the state of thermal deformation.

In addition, a cutting discharge unit 70 is installed on the other upper side of the main body 10. Cutting and discharging unit 70 is a constituent member to cut the paper tube (C) bonded to the linear overlapping portion to a certain length at the same time as the transfer is discharged in the form of paper straw (3).

The cutting and discharging unit 70 is a plurality of feed roller pairs 71 for transferring the cylindrical tube C in the discharge direction by the rotation drive, and the cylindrical tube C while rotating in a predetermined time. And a pair of cutting rollers 73 which are cut into paper straws 3 of a predetermined length.

The feed roller pair 71 may be formed of upper and lower feed rollers having a gripping groove 71a having a semicircular cross section around the outer circumference thereof. The feed roller pair 71 exerts a forced feed force for feeding the cylindrical tube C, and determines the actual production speed of the paper straw 3.

Since the transmission structure for the simultaneous rotational drive of the feed roller pair 71 of the cutting discharge unit 70 can be implemented in the same way as the transmission structure 45 of the preforming unit 40, further details are here for the sake of brevity of the specification. The description will be omitted.

The cutting roller pair 73 may be formed of upper and lower cutting rollers having a supporting groove having a semicircular cross section around the outer circumference thereof and having a cutting blade formed at a corresponding position in the supporting groove.

According to the embodiment, the cutting and discharging unit 70 is installed adjacent to the plurality of feed roller pairs 71 for transferring the cylindrical tube C in the discharge direction, and the outermost feed roller pairs 71. It may be formed as a cutting blade that is moved downward every time.

In the case of using the paper straw manufacturing apparatus 1 according to an embodiment of the present invention, the paper A drawn out from the paper roll 20 is a paper strip B of a predetermined width by the slitting roller pair 30. It is conveyed to the preforming unit 40 in the form of, and a predetermined width of the strip strip (B) is formed in the preforming unit 40 before the molding groove 41a is formed before being molded into the cylindrical tube (C) The lower roller 41 'is preformed downwardly by a combination of the upper roller 41 "on which the forming protrusion 41b is formed, and is thermally deformed while the lower side is heated by the first heating forming member 43.

The paper strip B formed to be bent downwardly through the preforming unit 40 is transferred to the cylindrical forming unit 50, and has a cylindrical tube tube formed by the molding rod 51 and the cylindrical feed roller pair 53. After being molded into C), the linear overlapping portion is heat-bonded by the heat joining unit 60, and is cut by the cutting discharge unit 70 and cut into the paper straws 3 of a predetermined length and discharged.

Therefore, in the case of the paper straw manufacturing apparatus 1 according to an embodiment of the present invention, as shown in the upper side of FIG. Thus, the paper A drawn out from the paper roll 20 is formed into a cylindrical shape by the molding bar material 51 and the cylindrical feed roller pair 53, and then a straight line overlapping portion is joined and then cut into a predetermined length. As the paper straw 3 can be continuously manufactured by the structure, the productivity of the paper straw 3 can be greatly increased.

In addition, as shown in the upper side of FIG. 5, the junction is not formed in a relatively long length of spiral, but is formed of a junction of a relatively short length of straight line overlap as shown in the lower side of FIG. Bonding strength can be achieved properly.

In addition, the present invention can solve the problem that when using a conventional cellophane strip by using a paper base paper, the cellophane strip is stuck to the small diameter axis and the spiral overlap is not constant.

Although some embodiments have been described above by way of example, it will be apparent to those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope thereof. Accordingly, the above-described embodiments should be considered as illustrative and not restrictive, and all embodiments within the scope of the appended claims and their equivalents shall be included within the scope of the present invention.

1: paper straw manufacturing apparatus, 3: paper straw
A: paper, B: paper strip
C: original tube, 10: main body
20: paper roll, 30: slitting roller pair
31: guide roller, 33: tension roll
40: preforming unit, 41: preforming feed roller pair
41 ': Lower roller, 41 ": Upper roller
41a: forming groove, 43: heating forming member
45: transmission structure, 45a: first gear
45b: first gear belt, 45c: second gear
45d: second gear belt, 45e: drive gear belt
45f: Electric gear pair, 50: Cylindrical forming unit
51: molded bar member, 51a: support member
53: cylindrical molding feed roller pair, 53 ': upper roller
53 ": Lower roller, 53a: Forming groove
60: heating bonding unit, 70: cutting discharge unit
71: feed roller pair, 71a: gripping groove
73: cutting roller pair

Claims (8)

Main body 10;
Paper roll 20 is rotatably mounted on the lower portion of the main body 10 and the paper (A) is wound in a roll form;
A slitting roller pair 30 installed on one side of the paper roll 20 and cutting the paper A drawn out from the paper roll 20 into a paper strip B of a predetermined width;
A preforming unit 40 installed on one side of the upper portion of the main body 10 to mold the paper strip B downwardly;
A cylindrical molding unit (50) installed at the upper center side of the main body (10) and configured to form a cylindrical strip (B) preformed by the preforming unit (40) into a cylindrical paper tube (C);
A heat joining unit 60 arranged above the cylindrical forming unit 50 to heat and bond the linear overlapping portion of the base tube C formed into a cylindrical shape; And
It is provided on the other side of the upper portion of the main body 10 and includes a cutting discharge unit 70 for cutting the paper tube (C) bonded to the straight line overlapping portion at the same time with the transfer,
The preforming unit 40 is installed on the upper side of the main body 10 so as to be rotatable at regular intervals and has a lower roller 41 'and an outer circumferential surface in which a forming groove 41a having a semicircular cross section is formed on the outer circumferential surface thereof. A plurality of preforming feed roller pairs 41 formed of an upper roller 41 ″ having a semi-circular cross section formed thereon, and preforming the paper strip B to be bent downward at the same time as the feed strip, and the preforming feed roller. It is provided on the lower side of the pair 41 and protrudes between the lower roller (41 ') of the preformed feed roller pair 41 includes a first heating forming member 43 for heating the lower side of the base tube (C) Paper straw manufacturing apparatus, characterized in that.
delete The method according to claim 1,
The preforming unit 40 further includes a transmission structure 45 for simultaneously rotating the plurality of preforming feed roller pair 41,
The transmission structure 45 includes a first gear 45a which is provided on each of the shafts of the plurality of lower rollers 41 'and a first surrounding the first gear 45a of the plurality of lower rollers 41' as a whole. A second gear 45c, a second gear 45c respectively provided on the shafts of the plurality of upper rollers 41 ", and a second surrounding the second gear 45c of the plurality of upper rollers 41" as a whole. A gear belt 45d, a drive gear belt 45e for rotationally driving one of the shafts of the plurality of lower rollers 41 ', and an upper and lower rollers forming one of the preformed feed roller pair 41. 41 ", 41 ') paper straw manufacturing apparatus, characterized in that it comprises an electric gear pair (45f) attached to the shaft.
The method according to claim 1,
The cylindrical molding unit 50 has a molding rod member 51 having one end supported so as to extend horizontally in a straight line at the upper center side of the main body 10, and to enable rotational driving at predetermined intervals in the upper and lower portions of the molding rod 51. The upper and lower rollers (53 ', 53 ") is formed and the forming groove (53a) having a semi-circular cross-section on the outer circumferential surface and the outer peripheral circumference of the molding bar 51 at the same time as the transfer of the paper strip (B) A plurality of cylindrical forming roller pairs 53, which are curved to be formed into cylindrical tube C, and a lower portion of the cylindrical forming roller pair 53, are provided below the cylindrical forming roller pair 53. Paper straw manufacturing apparatus characterized in that it comprises a second heating molding member (55) protruding between the roller (53 ") to heat the lower side of the base tube (C).
The method according to claim 4,
The heat bonding unit 60 is provided above the cylindrical feed roller pair 53 and protrudes between the upper rollers 53 'of the cylindrical feed roller pair 53 to form a straight line of the base tube C. Paper straw manufacturing apparatus, characterized in that formed by a heater for heating the overlap.
The method according to claim 1,
The cutting discharge unit 70 has a plurality of feed roller pairs 71 for transferring the cylindrical tube C in the discharge direction, and the cylindrical tube C is fixed while being rotated at a predetermined time. Paper straw manufacturing apparatus, characterized in that it comprises a pair of cutting rollers for cutting the length of the paper straw.
The method according to any one of claims 1 and 3 to 6,
The paper straw manufacturing apparatus, characterized in that the waterproof coating layer is laminated on one surface of the base paper (A), and the heat bonding coating layer bonded to the waterproof coating layer on heating the other surface of the base paper (A).
Paper straw manufactured by the paper straw manufacturing apparatus of any one of claims 1 and 3 to 6.

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