KR20190014261A - Method and Device for manufacturing insulating tape having improved elongation properties and Insulating tape made by the method - Google Patents

Abstract

The present invention relates to a method and device for manufacturing an insulating tape with improved elongation properties, and an insulating tape manufactured by the method. The manufacturing method comprises: a raw fabric transferring step of transferring synthetic resin fabric for manufacturing an insulation tape along a predetermined path by using a plurality of transferring rollers; an elongation rate regulating step of heating and pressing the raw fabric while passing the same between a heating roller which has concave and convex portions on the circumferential surface thereof and generates heat, and a pressing roller which is arranged corresponding to the heating roller wherein the elongation rate regulating step is for removing elongation grains formed in the raw fabric by tensile force of the transferring rollers during performance of the raw fabric transferring step; an adhesive applying step of applying an adhesive on one side of the raw fabric completed with the elongation rate regulating step; a rolling step of winding the raw fabric, on which the adhesive is applied, around a bobbin; and a cutting step of cutting the raw fabric wound around the bobbin by predetermined width. According to the present invention, the method for manufacturing an insulating tape with improved elongation properties finely divides the elongation grains on the raw fabric while manufacturing the insulation tape to dysfunction the elongation grains such that the manufactured insulation tape is made to have overall regular elongation ratios.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating tape manufacturing method and apparatus having improved stretch properties and an insulating tape made by the above method,

The present invention relates to an adhesive tape, and more particularly, to an insulating tape manufacturing method and apparatus with improved stretchability so as to be easily cut, and an insulating tape manufactured by the method.

For example, an insulating tape, which is indispensably used for electric work, is produced by preparing a vinyl fabric for a tape by using a synthetic resin such as soft PVC or PE, coating a non-dry adhesive on one side of the fabric, It is commercialized through additional processes.

FIG. 1 is a view schematically showing an apparatus for manufacturing a fabric for insulating tape in the related art, and FIGS. 2 (a) and 2 (b) are views showing a fabric 17 and an insulating tape 23 made using the manufacturing apparatus.

1, a manufacturing apparatus for the insulating tape fabric 17 is provided with a resin supply section 12 for receiving and supplying the synthetic resin 11 to be used, a plurality of forming rollers 13 and a feeding roller 15 .

The shaping roller 13 passes through the fluid synthetic resin supplied from the resin supply portion 12 and functions to form the sheet in the form of a sheet having a certain thickness. The sheet-like fabric 17, which is passed through the shaping roller 13 and made in the form of a sheet, is stretched by a plurality of feeding rollers 15, is fed along a predetermined path and is subjected to an adhesive application process, 19).

However, during the feeding process by the feeding roller 15, the raw material 17 can not be subjected to a non-uniform tensile force, so that the raw material 17 has a tensile texture 18 in a part thereof. As shown in Fig. 2A, the tensile texture 18 is an irregular pattern extending in the longitudinal direction of the raw fabric 17, and is formed at a plurality of locations in the width direction of the raw fabric. The tensile texture 18 can not be visually confirmed.

The tensile texture 18 is a portion where the portion is pulled relatively more strongly than the other portion, that is, a portion where the molecular interval of the fabric texture is finely stretched. It is needless to say that the material 17 of the fabric 17 is different from that of the portion where the tensile texture 18 is located and the portion without the tensile texture. For example, the portion without the tensile texture 18 has originally designed properties, but the portion where the tensile texture 18 is located is not broken.

Such tensioning effect 18 is inevitably required to be carried out by pulling the fabric using the feeding roller 15 in a situation where the surface frictional force or diameter of the feeding roller 15, particularly the thickness of the fabric 17, .

If the rolling of the raw material 17 to the bobbin 19 is completed, the raw material 17 is cut along the cutting line 21 at a predetermined interval in the width direction to form an insulating tape 23 (see FIG. 2B) .

However, the problem is when the tensile member 18 is included in the inner region of the insulating tape 23 which is the finished product. Since the cutting lines 21 are spaced at regular intervals irrespective of the presence or absence of the tension 18 and the tensile deformations 18 are randomly distributed in the width direction of the fabric, an insulating tape 23 Is an insulating tape made of a fabric in which the tensile member 18 is embedded.

The insulating tape 23 containing the tensile texture 18 has a disadvantage in that it is not easily broken when a certain tensile force is applied due to the action of the tensile texture 18 and particularly the cut portion is very dirty.

Insulation tape should be good in physical flexibility and tensile strength as it protects wires and protects electric leakage by tightly wrapping exposed part of electric wire. Especially, tensile force should be good, for example, a large number of wires in a widened state can be strongly bound and fixed.

However, if the tensile strength is too strong, the insulation tape may not be cut off and the use may be inconvenient. For example, the operator may not be able to cut easily when cutting the insulating tape with the force of the hand after taping. If the insulation tape is not easily cut, it is very troublesome to use a cutting knife or scissors for each operation.

In order to solve such inconvenience, an electric insulating tape (Domestic Registered Utility Model No. 20-0240494) has been proposed by the inventor of the present invention to facilitate cutting. The seasonal insulating tape forms a concave groove on one side or both sides of the tape so that the concave groove portion is easily cut when the user pulls the tape.

However, the electric insulating tape has a disadvantage in that it requires a complicated process of forming an additional groove in the manufacturing process. Further, since the concave groove is opened in the width direction of the tape, there is a problem that dust or foreign matter can easily penetrate into the tape.

Registration Utility Model No. 20-0240494 (Electric Insulation Tape with Easy Cutting) Korean Patent Registration No. 10-0746740 (cloth tape easy to cut)

The present invention provides a method and apparatus for manufacturing an insulating tape having improved stretch properties having uniform elongation as a whole by eliminating a tensile action formed inside a fabric for an insulating tape, There is a purpose.

It is another object of the present invention to provide an insulating tape having improved stretchability so that high quality and high performance can be realized since tensile textures are removed and uniform drawing properties are obtained.

In order to achieve the above object, the present invention provides a method of manufacturing an insulating tape having improved stretchability, the method comprising: a fabric transferring step of transferring a synthetic resin fabric for manufacturing an insulation tape along a predetermined path using a plurality of transfer rollers; The method of claim 1, further comprising the steps of: applying a pressure to the heating rollers, the heating rollers being disposed on the outer circumferential surface of the fabric rollers, And then heating and pressurizing the same; An adhesive applying step of applying an adhesive to the fabric having completed the elongation-equalizing step; A rolling step of winding the fabric-coated fabric on the bobbin; And a cutting step of cutting a raw material wound on the bobbin to a predetermined width.

The concavo-convex portion may include: And a plurality of linear protrusions extending in parallel to each other and having a predetermined pitch and grooves positioned between the linear protrusions, wherein the elongation equalizing step is a process of applying heat and pressure concentrated on the linear protrusions to the fabric .

Further, in the elongation-equalizing step, the heating temperature of the heating roller is 70 ° C to 90 ° C, and the pressing force of the pressing roller to the heating roller is 2 to 6 kg / cm 2.

In order to accomplish the above object, the present invention provides an insulation tape manufacturing apparatus with improved stretchability, which is used for transferring a fabric for manufacturing an insulation tape containing a tensile texture and removing tensile stress to uniform the elongation of the fabric An elongation rate equalizing unit having a heating roller on which a concave / convex portion is formed on an outer circumferential surface thereof, and a pressure roller which is disposed in correspondence with the heating roller and passes the raw material between the heating roller and presses the raw material elastically against the heating roller; Roller heating means for heating the heating roller by transmitting heat energy to the heating roller; An actuator for adjusting the pressing force of the pressure roller against the heating roller; An adhesive applicator for applying an adhesive to the fabric passed through the elongation-rate equalizing unit; A rolling device which is located on the downstream side of the adhesive applying device and which winds the adhesive-coated fabric on the bobbin; And a cutting device for cutting the fabric wound on the bobbin by the rolling device.

The concavo-convex portion may include: A plurality of linear protrusions extending in parallel with each other and a groove portion located between the linear protrusions, the pressure roller comprising: And the outer circumferential surface of the protruding portion has an elastic force so as to prevent the linear protruding portion from remaining on the fabric when the fabric is pressed.

The roller heating means includes a heating medium supply portion for heating and supplying oil as a heating medium. The heating roller is provided with an inlet for receiving the oil into the heating roller, and an oil passage for passing the oil, which has passed through the inside of the heating roller, And an outlet for discharging it to the outside is provided.

According to another aspect of the present invention, there is provided an insulation tape comprising: a fabric transferring step of transferring a synthetic resin fabric for manufacturing an insulation tape along a predetermined path using a plurality of transfer rollers; The method of claim 1, further comprising the steps of: applying a pressure to the heating rollers, the heating rollers being disposed on the outer circumferential surface of the fabric rollers, And then heating and pressurizing the same; An adhesive applying step of applying an adhesive to the fabric having completed the elongation-equalizing step; A rolling step of winding the fabric-coated fabric on the bobbin; And a cutting step of cutting a raw material wound on the bobbin to a predetermined width.

The insulating tape manufacturing method of the present invention having improved stretchability as described above makes it possible to finely divide the tensile texture inherent in the fabric during fabrication of the insulating tape so that the fabricated insulating tape has a uniform elongation as a whole.

In addition, the insulating tape according to the present invention has a good workability because the function of tensile stitching is removed and uniform drawing property is obtained, and the cut surface is neat.

FIG. 1 is a view for explaining a conventional apparatus for manufacturing a tape for insulation tape.
2A and 2B are views showing a fabric and an insulation tape manufactured through the manufacturing method of FIG.
3 is a block diagram showing the overall structure of an insulation tape manufacturing apparatus with improved stretchability according to an embodiment of the present invention.
FIG. 4 is a diagram for explaining a state in which an insulating tape is manufactured using the manufacturing apparatus shown in FIG.
Fig. 5 is a view for explaining the action of the heating roller and the pressure roller shown in Fig. 4. Fig.
6A, 6B and 6C are views showing various examples of the heating roller which can be applied to the production apparatus shown in FIG.
7 is a view for explaining a structure of an insulating tape having improved stretchability according to an embodiment of the present invention.
8 is a flowchart sequentially illustrating an insulating tape manufacturing method with improved stretchability according to an embodiment of the present invention.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Basically, the insulation tape (53 in Fig. 7) improved in stretchability according to this embodiment to be described later is in a state in which a substantial part of the tensile texture (18 in Fig. 2) is removed. 7, a heating and pressing zone Z is formed on the insulating tape 53. The heating and pressing zone Z is formed by finely cutting the elongated elongation piece 18 in the longitudinal direction at fine intervals It does not function. The interval or the width of the heating and pressing area Z can be adjusted.

As described above, since the tensile texture 18 of the insulating tape 53 is cut and the tensile textures do not act, the insulating tape is very good in stretchability and can be particularly easily cut. For example, when using an insulating tape, it is easy to cut even with a small force, and the cut surface is clean and neat.

FIG. 3 is a block diagram showing the overall structure of an insulation tape manufacturing apparatus 70 according to an embodiment of the present invention. FIG. 4 is a view for explaining how an insulation tape is manufactured using the manufacturing apparatus shown in FIG. FIG.

As shown in the figure, the insulating tape manufacturing apparatus 70 with improved stretchability according to the present embodiment includes an elongation-rate equalizing unit 36, an actuator 37 for driving the elongation-rate equalizing unit 36, a heating medium supply unit 39 A motor 53, a control unit 51, a rolling device 49, a cutting device 50, and the like.

The elongation equalizing unit 36 is composed of a heating roller 33 and a pressure roller 35. The heating roller 33 and the pressure roller 35 are arranged in parallel to each other and pass the cloth 17 therebetween, thereby heating and pressing. While the fabric 17 passes between the heating roller 33 and the pressure roller 35, the tensile deformation 18 formed therein is partially or substantially completely removed, Will not work.

A plurality of the elongation-equalizing units 36 may be applied, and three sets are applied in the present embodiment.

The heating roller 33 has a concavo-convex portion 33e on its outer circumferential surface. The concavo-convex portion 33e has a linear protrusion 33c extending in a direction perpendicular to the circumferential direction of the heating roller 33, that is, in a direction parallel to the rotation center axis of the heating roller, and a linear protrusion 33c between the linear protrusions 33c And a groove portion 33d.

It is needless to say that the shape, pitch interval, or height of the projecting portion 33c may be varied depending on the case. For example, the protruding portion 33c may be sharpened or blunt.

As shown in FIG. 5, the protrusion 33c presses the fabric 17 in the thickness direction and transfers heat. The heat outputted from the heating roller 33 is transferred to the fabric 17 in a state of being concentrated in the form of a stripe through each protrusion 33c.

An inlet 33a and an outlet 33b are provided at one side of the heating roller 33 and an oil circulation path (not shown) is provided inside the heating roller 33 to connect the inlet 33a and the outlet 33b .

The inlet 33a receives the heating medium supplied through the supply pipe 43 from the heating medium supply unit 39, that is, the heated oil, and guides the heated medium to the oil circulation path inside the heating roller 33. [ The outlet 33b discharges the oil that has passed through the oil circulation path through the recovery pipe 45 and transfers the oil to the heating medium supply unit 39. [

Reference numeral 41 denotes a pump. The pump 41 pumps the heated oil from the heating medium supply unit 39 and feeds the oil to each heating roller 33.

The oil passes through the inside of the heating roller 33 while being heated by the separate heating means and transfers its heat to the heating roller 33 so that the heating roller 33 is heated. The temperature of the heating roller is preferably maintained at about 70 캜 to 90 캜. In any case, the heating roller 33 transfers heat to the fabric 17 in a heated state by the oil.

The pressure roller 35 is a roller disposed on the upper portion of each heating roller 33 and presses the fabric 17 downward toward the heating roller 33. The pressing force of the pressure roller 35 against the heating roller 33 may be about 2 to 6 kg / cm 2.

Particularly, the pressing roller 35 is surrounded with an elastic pressing portion 35a. The elastic pressing portion 35a is a hollow pipe member made of a synthetic resin having elasticity or a rubber material. Since the elastic pressing portion 35a has elasticity, when an external force is applied to the surface of the elastic pressing portion 35a, the elastic pressing portion 35a is elastically pressed and restored to its original shape when the external force is removed.

The reason why the elastic pressing portion 35a having such an elastic force is applied is to prevent a stripe-shaped groove from being formed on the raw material 17 passing through the heating roller 33 and the pressing roller 35. [ In other words, the protrusions 33c are not left on the cloth 17.

The pressing force of the pressure roller 35 against the heating roller 33 is controlled by the actuator 37. [ The actuator 37 functions to press the pressure roller 35 in the direction of arrow F in FIG. 5 when the raw material 17 passes between the heating roller 33 and the pressure roller 35.

The heating roller 33 and the pressure roller 35 receive rotational force from the motor 53 and rotate axially in the opposite direction. A power transmission means such as a belt, a chain, or a gear is provided between the motor 53 and the heating roller 33 and the pressure roller 35 in order to transmit the rotational force of the motor 53 to the heating roller 33 and the pressure roller 35, It is natural that it is installed.

In addition, the motor 53 is controlled by the control unit 51. The rotational speed and rotational direction of the drive shaft of the motor 53 are appropriately controlled through the control unit 51. [ The actuator 37, the heating medium supply unit 39 and the pump 41 are also optimally controlled in real time by the control unit 51 in the same manner as the motor 53.

The heating medium supply portion 39 includes a chamber (not shown) for containing oil and a heating means for heating the oil circulating through the heating roller 33, the supply pipe 43, the recovery pipe 45 and the chamber do. The configuration of the heat medium supply portion may be changed as long as it can function to heat and circulate the oil as the heat medium.

On the downstream side of the elongation-rate equalizing unit 36, an adhesive applying device 48, a rolling device 49, and a cutting device 50 are provided.

The adhesive applicator (48) applies an adhesive to one side of the fabric so that the produced tape (53) has an adhesive force. In addition, the rolling device 49 is a device for winding the insulating tape fabric 47 passed through the adhesive applying device 48. [ It goes without saying that an appropriate bobbin must be used for the rolling operation. The cutting device 50 is a device for cutting a raw material 47 wound on a bobbin to a predetermined width. An individual insulating tape 53 is produced by the cutting device 50.

Fig. 5 is a view for explaining the action of the heating roller and the pressure roller shown in Fig. 4. Fig.

Referring to FIG. 5, it can be seen that the fabric 17 passes between the heating roller 33 and the pressure roller 35. As shown in the drawing, the heat of the heating roller 33 moves in the direction of arrow H and is concentrated on each projection 33c, and the pressure roller 35 presses the fabric 17 toward the projection 33c.

The portion of the fabric 17 supported by the projecting portion 33c is pressed and heated in the thickness direction by the action of the heating roller 33 and the pressure roller 35 described above. Accordingly, the tensile member 18 located at the portion to be pressed by the projecting portion 33c and the pressing roller 35 is formed by the heat and the pressing force provided by the projecting portion 33c, like the principle of spreading the wrinkles through ironing Unfolded and removed.

That is, the portion of the elongated elongated piece 18 heated and pressed by the projecting portion 33c is ironed and unfolded. As shown in Fig. 7, the unfolded portion formed by heating and pressing in this manner forms the heat-pressing region Z and finely cuts the tensile texture 18. [

As described above, the tension member 18 extending in a substantially linearly extending manner in the conveying direction of the raw material 17 passes through the heating roller 3 and the pressure roller 35, ) Will no longer function. It is needless to say that the tensile texture 18 does not work, thereby improving the overall stretchability of the fabric.

The raw material after passing through the heating roller 33 and the pressure roller 35 is a raw material 47 having an improved stretch property and is coated with an adhesive agent through a subsequent process and then passed through the rolling device 49 and the cutting device 50 And is made of an individual insulating tape 53. [

6A, 6B and 6C are views showing various examples of the heating roller which can be applied to the manufacturing apparatus 49 shown in FIG.

As shown in the figure, the shape of the concave-convex portion 33e applied to the heating roller 33 can be variously changed. For example, in the heating roller 33 shown in Fig. 6A, the projecting portion 33c and the groove portion 33d are wavy. In addition, the heating roller 33 of Fig. 6B has an arcuate protrusion 33c. The groove 33d between the projections 33c takes a bent shape. The pitch P1 of the projecting portion 33c in the heating roller 33 shown in Figs. 6A and 6B is about 1 mm.

On the other hand, the convexo-concave portion 33e of the heating roller 33 in Fig. 6C takes the form of a saw tooth. Since the projecting portion 33c takes the form of a saw tooth, the pitch P2 of the concave-convex portion is smaller than the above P1 in order to minimize the concentration of stress applied to the fabric. For example, P2 may be about 0.5 mm.

7 is a view for explaining a structure of an insulating tape 53 having improved stretchability according to an embodiment of the present invention.

As shown in the figure, an insulating tape 53 having a constant width is wound around the bobbin 19. The insulating tape 53 is obtained by cutting the raw material 47 to a predetermined width through the cutting device 50 and has a plurality of heating and pressing zones Z on the inner surface thereof.

As described above, the heating and pressing region Z is a portion formed by the heating and pressing action of the projecting portion 33c and the elastic pressing portion 35a of the heating roller 33. The heating pressing region Z cuts the tensile solid 18, . The interval of the heating and pressing zones Z is the same as the pitch interval of the projection 33c.

8 is a flowchart schematically showing a method of manufacturing an insulating tape with improved stretchability according to an embodiment of the present invention.

As shown in the figure, the method for manufacturing an insulating tape with improved stretchability according to the present embodiment includes a far-end feeding step 102, an elongation equalizing step 104, an adhesive applying step 105, a rolling step 106, (108).

The far-end feeding step 102 is a process of feeding the far-end 17 to the elongation equalizing unit 36 side by using a plurality of feeding rollers 15. The arrangement of the feeding roller 15 for performing the far-end feeding step 102 can be variously changed.

The elongation equalizing step 104 is a step for removing the tensile result 18 formed in the raw material 17 by the tensile force of the conveying roller during the far end conveying step 102. The elongation percentage equalizing unit 36 ).

The elongation-equalizing step 104 may be composed of a first-order equalization step 104a, a second-order equalization step 104b, and a third-order equalization step 104c. The first, second, and third order equalization steps 104a, 104b, and 104c are sequentially performed in three elongation equalizing units 36 shown in FIG. 4, and the method is the same.

Each of the smoothing processes 104a, 104b and 104c is a process of heating and pressing the raw material 17 between the heating roller 33 and the pressure roller 35 as described above. At this time, the heating temperature of the heating roller is 70 ° C to 90 ° C, and the pressing force of the pressing roller to the heating roller can be set to about 2 to 6 kg / cm 2.

In addition, in the present embodiment, the elongation-equalizing step 104 is constituted by 1, 2, and 3 steps, but this may vary as needed. For example, the homogenization process may be completed first, or may proceed continuously more than fourth.

If the elongation equalizing step 104 is completed, an adhesive applying step 105 is performed. The adhesive applying step 105 is a process of applying an adhesive to one side of a fabric having a uniform elongation, and the method may be performed according to a known method.

The subsequent rolling step 106 is the process of winding the fabric coated with the adhesive onto the prepared bobbin, and the cutting step 108 cuts the wound fabric with the bobbin. The fabrication of the insulating tape 53 shown in Fig. 7 is completed through the cutting step 108. Fig.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

11: synthetic resin 12: resin supply part 13: forming roller
15: Feeding roller 17: Fabric 18: Tensile bond
19: Bobbin 21: Cutting line 23: Insulation tape
33: Heating roller 33a: Inlet port 33b: Outlet
33c: projecting portion 33d: groove portion 33e: concave and convex portion
35: pressure roller 35a: elastic pressing portion 36: elongation rate equalizing unit
37: actuator 39: heating medium supply part 41: pump
43: supply pipe 45: recovery pipe 47: fabric for insulation tape
48: adhesive application device 49: rolling device 50: cutting device
53: Insulation tape 70: Manufacturing apparatus
Z: heating and pressing area

Claims (7)

A fabric transfer step of transferring a synthetic resin fabric for manufacturing an insulation tape along a predetermined path by using a plurality of transfer rollers;
The method of claim 1, further comprising the steps of: applying a pressure to the heating rollers, the heating rollers being disposed on the outer circumferential surface of the fabric rollers, And then heating and pressurizing the same;
An adhesive applying step of applying an adhesive to the fabric having completed the elongation-equalizing step;
A rolling step of winding the fabric-coated fabric on the bobbin;
And a cutting step of cutting a raw material wound on the bobbin to a predetermined width. The method according to claim 1,
The concave /
A plurality of linear protrusions extending in parallel and having a constant pitch, and a groove portion located between the linear protrusions,
Wherein the step of equalizing the elongation is a step of applying heat and pressure concentrated on the linear protrusions to the fabric. 3. The method of claim 2,
Wherein the heating temperature of the heating roller during the elongation equalizing step is 70 占 폚 to 90 占 폚 and the pressing force of the pressing roller against the heating roller is 2 to 6 kg / cm2. A heating roller having a concavo-convex portion formed on an outer circumferential surface thereof for uniforming the elongation of the fabric by transferring a fabric for forming an insulating tape containing a tensile texture and removing tensile texture, And a pressure roller for passing the fabric through between the pressure roller and the heating roller and pressing the fabric toward the heating roller side;
Roller heating means for heating the heating roller by transmitting heat energy to the heating roller;
An actuator for adjusting the pressing force of the pressure roller against the heating roller;
An adhesive applicator for applying an adhesive to the fabric passed through the elongation-rate equalizing unit;
A rolling device which is located on the downstream side of the adhesive applying device and which winds the adhesive-coated fabric on the bobbin;
And a cutting device for cutting the fabric wound on the bobbin by the rolling device. 5. The method of claim 4,
The concave /
A plurality of linear protrusions extending in parallel to each other and a groove portion located between the linear protrusions,
Wherein the pressure roller comprises:
Wherein an outer circumferential surface of the linear protruding portion has an elastic force so as to prevent the linear protruding portion from remaining on the fabric during pressurization of the fabric. 5. The method of claim 4,
The roller heating means includes a heating medium supply portion for heating and supplying oil as a heating medium,
Wherein the heating roller is provided with an inlet for receiving the oil into the heating roller and an outlet for discharging the oil passed through the inside of the heating roller to the outside of the heating roller. An insulating tape having improved stretchability, which is produced by the production method of any one of claims 1 to 3.

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