JP4632750B2 - Spacer tape manufacturing method and spacer tape - Google Patents

Description

  The present invention relates to a method for manufacturing a spacer tape that is sandwiched between the tab tapes in order to prevent the tab tapes from contacting each other, and a spacer tape.

  As described in Patent Document 1 to be described later, the conventional spacer tape is formed into a tape having a predetermined width by cutting a film roll obtained by winding a synthetic resin film having a predetermined width on the roll or by slitting. After being cut, the tape is heated and softened, and then the side edges of the tape are spaced apart in the longitudinal direction of the tape, and the concavo-convex portions are produced by, for example, embossing. .

  In Patent Document 1, the tape is protruded in the thickness direction and the width direction of the tape at predetermined intervals in the longitudinal direction of the tape at both side edges of the tape by profile extrusion molding. A method for manufacturing a spacer tape in which protrusions having a circular cross section or an elliptic cross section are integrated is disclosed.

JP 2003-218170 A

  According to this conventional method for manufacturing a spacer tape, when the film roll is cut or slitted, chips are generated, the chips adhere to the spacer tape, and are further formed into a tab tape or a tab tape. It may transfer to electronic wiring and cause a so-called contamination problem that impairs the electrical characteristics of the electric / electronic wiring.

  FIG. 5 is a cross-sectional view schematically showing a cross section of an end portion in the width direction of a conventional spacer tape, that is, a side edge portion.

  Since the film roll is cut or slit without heating to prevent the edges of the tape t from being fused after cutting, as shown in FIG. A burr b is formed on the ridge line where the surface t1 and the end surface t2 in the width direction intersect, and the end surface t2 in the width direction of the tape t becomes a rough rough surface damaged by the cutting blade.

  When the tape t is wound around the reel or when the tape t is wound out from the reel, the burr b or the protruding portion of the end surface t2 is broken or scraped to become waste, which is transferred to electric / electronic wiring, so-called contamination contamination. Cause problems.

  Furthermore, in order to form an uneven portion on the cut tape t, it is necessary to heat the softening point or more after forming the tape t. This consumes a lot of energy, and the number of processes and manufacturing time. There is a problem that the manufacturing cost is increased due to the increase.

  In addition, as disclosed in Patent Document 1, in the case where a protrusion having a circular cross section or an elliptic cross section protruding in the thickness direction and the width direction of the tape t is added to the side edge portion of the tape t, 1000 to 1600 mm. When slitting a large amount of raw material to a predetermined width, loss will always occur at both ends, and a long core material for winding the raw material is required. Since a film was wound around a short core material and then a tape-shaped film was drawn from the core material and heated to form irregularities, the process was complicated and the manufacturing cost was significantly increased. There are problems such as.

  The present invention solves these problems of the prior art, eliminates the possibility of causing contamination problems, and provides a spacer tape manufacturing method capable of manufacturing a spacer tape at a low cost, and a spacer tape manufactured by this spacer tape manufacturing method. The purpose is to provide.

In order to achieve this object, a first spacer tape manufacturing method according to the present invention includes an extrusion molding step in which a thermoplastic resin is extruded to form a tape, and this extrusion molding step following the extrusion molding step. Before the tape formed by the above is cooled below the softening point, the unevenness that forms unevenness in the thickness direction of the tape is formed on the side edge of the tape at intervals in the longitudinal direction of the tape. Between the part forming step and until it is cooled and solidified from the melted state, the front and back main surfaces and the end surfaces in the width direction spreading in the width direction and the longitudinal direction of the tape are formed smoothly by surface tension. The technical means is characterized in that the step of forming a ridge line intersecting the main surface and the end surface into a smooth curved surface is performed .

According to the method of the present invention, since the tape is formed by an extrusion molding method instead of slitting the raw material to form a tape, there is no possibility of generating chips when cutting the tape. The possibility of causing contamination problems due to the generated chips is eliminated.

  In addition, there is no risk of burrs being formed on the edge of the tape, or the end surface of the tape becoming rough and rough, so that the edge of the tape breaks when winding to the reel or feeding from the reel, There is no risk of being scraped off, and there is no possibility of causing contamination problems due to debris generated during winding onto the reel or feeding from the reel.

  Furthermore, since the edge of the tape becomes smooth, the reel can be smoothly wound and fed out from the reel.

  Furthermore, there is no need for a long or short core material as in the prior art, and there is no need to heat the tape to form an uneven portion, reducing the number of manufacturing processes, Thus, the spacer tape can be manufactured at a low cost since the manufacturing time can be shortened and resources and energy can be saved.

  In addition, since the concavo-convex portion is formed on the flat tape, no extra material (resource) is required, so that it is not necessary to increase the material (resource) cost, and the spacer tape can be manufactured at a lower cost.

According to the method of the present invention, in the spacer tape of the present invention, that is, the spacer tape in which the concavo-convex portions are formed at intervals in the longitudinal direction of the tape, the tape is formed by extrusion molding. The uneven portion is formed on the tape before the extruded tape is cooled below the softening point, and is cooled by the surface tension until solidified by cooling from the molten state. The main surface of the front and back which spreads in a longitudinal direction and the end surface of the width direction are formed smoothly, and the ridgeline where a main surface and an end surface cross | intersect is formed in the smooth curved surface, It is characterized by the above-mentioned.
In this case, “with an interval in the longitudinal direction of the tape” means an arbitrary interval such as a random interval in addition to a constant interval.

Hereinafter, the method of the present invention will be described in more detail.
In the present invention, the thermoplastic resin is a natural material that softens and melts by heating, does not cause polymerization or condensation reaction even if heating is continued, decomposes at a high temperature, and solidifies when cooled to a certain temperature. It refers to a resin or a synthetic resin, and is not particularly limited as a thermoplastic synthetic resin.

  This thermoplastic synthetic resin is, for example, put into a known extrusion molding device in the form of powder, granules, pellets, etc., heated to a temperature higher than the melting point, and then formed into an extrusion die (nozzle or die) of the extrusion molding device. It is extruded from the formed small holes. The shape of the small holes of the extrusion mold only needs to be formed so that a tape having a predetermined width can be obtained, and examples thereof include those formed in a T shape in a plan view.

  This extrusion mold having a T-shaped small hole is called a T die, and an extrusion molding method using this T die is called a T die method and is generally well known.

  An extrusion molding apparatus used for extrusion molding includes a cylinder closed at one end, a screw built in the cylinder, a hopper for introducing a molding material, that is, a thermoplastic resin into one end of the cylinder, and the other end of the cylinder. An extrusion die assembled to the part and a heater arranged around the cylinder and for heating the molding raw material in the cylinder, the molding raw material charged into the cylinder from the hopper is heated and melted by the heater, and this molten resin Is extruded from the extrusion mold by rotating the screw.

  The extruded thermoplastic resin is formed into a tape with a predetermined width, and is cooled and solidified by the atmosphere. Before the thermoplastic resin is cooled to the softening point, for example, using a roll press, from one side of the tape A concave-convex portion made of a concave portion recessed on the opposite side is formed.

  The end face of the extruded tape is smoothed by the surface tension until it is cooled and solidified from the molten state, and the ridgeline where the molded main surface and the end face intersect is naturally rounded by the surface tension. When the tape is wound on the reel or when it is unwound from the reel, the tape is less likely to be caught on the flange of the reel, and the tape can be smoothly wound or fed, and there is no possibility of generating chips when forming the tape. This eliminates the risk of contamination caused by chips generated during tape formation.

  In addition, the surface of the extruded tape becomes smooth due to surface tension until the thermoplastic resin constituting the tape is cooled and solidified from the molten state, and the ridge line where the molded surfaces intersect is the surface. Since it is naturally rounded by the tension, burr is not formed on the edge of the tape, and the end surface in the width direction of the tape does not become rough, and the tape is wound around the reel or fed out from the reel. Sometimes there is no risk that the flange on the reel will break off the burrs on the edge of the tape, or the convex part on the end surface of the tape will be scraped off. There is no risk of problems.

  In addition, the concavo-convex part is formed in a softened state after extrusion molding of the thermoplastic resin, so there is no need to heat the molded tape, and resources and energy can be saved greatly, and the number of processes As a result, the manufacturing time can be shortened, and the cost can be greatly reduced.

  In addition, since the concave and convex portions are formed instead of the solid protrusions, no extra material is required, so that the material cost can be saved and the spacer tape can be manufactured at a lower cost.

By the way, since the spacer tape of the present invention is formed by the method of the present invention, according to the spacer tape of the present invention, there is a problem of contamination due to chips generated at the time of tape formation, winding on the reel, and feeding from the reel. At this time, there is no possibility of causing a problem of contamination due to waste generated.

  In addition, according to the spacer tape of the present invention, it is not necessary to heat the tape to form the concavo-convex portion, the number of manufacturing steps can be reduced, the manufacturing time can be shortened, and energy can be saved greatly. The spacer tape can be manufactured at a low cost.

  Furthermore, according to the spacer tape of the present invention, the uneven portion is formed in the thickness direction of the tape, but this uneven portion is a solid (in terms of hollow, it means that the inside is clogged). In addition, there is no need for a long core material for taking up a large amount of original fabric and a tape winding core material obtained by slitting the original fabric to a predetermined width. Since (resources) are not required, the material (resource) cost can be saved and the spacer tape can be manufactured at a lower cost.

  In addition, according to the spacer tape of the present invention, since the end edge of the tape is smooth, the reel can be smoothly wound and fed out from the reel.

As described above, in each of the methods of the present invention, there is no loss at both ends of the raw material when slitting the long original material to a predetermined width, and chips are generated when the tape is formed. In addition, there is no possibility of generating scraps when the tape is wound on the reel or when the tape is unwound from the reel of the tape, so that there is no possibility of causing a contamination problem.

Also, in the method of the present invention , the long core material for winding the raw material and the short core material for winding the tape obtained by slitting to a predetermined width are not required, and the tape is formed. After that, since it is not necessary to heat the tape to form the uneven part, resources and energy can be saved greatly, and since the spacer tape can be obtained in one process, the process is simple and the manufacturing cost is reduced. Further, the surface of the tape becomes smooth due to surface tension until the thermoplastic resin constituting the tape having a predetermined width obtained by extrusion molding is cooled from the molten state and solidified. Since the ridgeline where the surfaces intersect is naturally rounded, there is no burr on the edge of the tape, and furthermore, the end surface in the width direction of the tape is smooth, so that the tape can be wound on a reel, reel When the tape is fed out, there is no risk that the flange on the reel will break off the burrs on the edge of the tape and the convex part of the tape end face will be scraped off. The effect of eliminating the possibility of causing a contamination problem is achieved.

In addition, in the method of the present invention , not the solid protrusions but the uneven portions formed by unevenly forming the tape in the thickness direction are formed, so that the effect of saving the material cost and manufacturing the spacer tape more inexpensively is obtained. be able to.

Next, since the spacer tape of the present invention is manufactured by the method of the present invention, according to the spacer tape of the present invention, the tape is formed from the tape at the time of tape formation, winding on the reel, and feeding from the reel. There is no possibility of generating scraps, and therefore, there can be obtained an effect that there is no risk of contamination caused by scraps of the tape.

  Further, in the spacer tape of the present invention, it is not necessary to heat the tape to form the uneven portion after the tape is formed, so that energy can be saved greatly, and the spacer tape can be obtained in one step. Since the manufacturing time can be shortened by reducing the number, it is possible to obtain effects such as a significant cost reduction.

  Furthermore, in the spacer tape of the present invention, the edge line of the tape edge is rounded and the end surface of the tape is formed smoothly, so that the tape can be wound on the reel or from the tape reel. An effect that the feeding can be smoothly performed can be obtained.

  In addition, according to the spacer tape of the present invention, not the solid protrusion but the uneven portion formed by unevenly forming the tape in the thickness direction is formed, so that the material cost can be saved and the spacer tape can be manufactured at a lower cost. There are effects such as.

  A spacer tape manufacturing method and a spacer tape according to an embodiment of the present invention will be described in detail with reference to the drawings as follows. Of course, the present invention is not limited to this embodiment.

In the drawings, FIG. 1 is a cross-sectional view schematically showing the configuration of a spacer tape manufacturing apparatus for carrying out the method of the present invention , and FIG. 2 is a cross-sectional view of the edge in the width direction of the tape formed by this spacer tape manufacturing apparatus. FIG. 3 is a cross-sectional view schematically showing, and FIG. 3 is a cross-sectional view schematically showing a cross-section in the longitudinal direction at the side edge of the spacer tape according to one embodiment of the present invention manufactured by the spacer tape manufacturing apparatus, FIG. 4 is a perspective view of the spacer tape.

  As shown in FIG. 1, the spacer tape manufacturing apparatus includes an extrusion molding apparatus 1 that forms a tape, and a concavo-convex part forming apparatus 2 that includes a roll press that forms a concavo-convex part on the tape formed by the extrusion molding apparatus 1. Prepare.

  The extrusion molding apparatus 1 includes a cylinder 11 with one end closed, a screw 12 built in the cylinder 11, a drive motor that rotates the screw 12 in one direction, a molding raw material in one end of the cylinder 11, That is, the hopper 13 into which the thermoplastic synthetic resin R is charged, the extrusion die 14 assembled to the other end of the cylinder 11, and the molding material (thermoplastic synthesis) in the cylinder 11 are arranged around the cylinder 11. And a heater 15 for heating the resin R).

  As the molding raw material, for example, a thermoplastic synthetic resin R made of pellet-like polyethylene is used, and this molding raw material is put into the cylinder 11 from the hopper 13, and the screw 12 is rotated to transfer the molding raw material from one end side of the cylinder 11. It is heated and melted by the heater 15 while being continuously pumped to the end.

  Thereby, a tape T made of thermoplastic synthetic resin, that is, polyethylene is extruded from the other end of the cylinder 11 through a small hole of the extrusion die 14.

  As shown in FIG. 2, due to the surface tension of the thermoplastic synthetic resin R, the front and back main surfaces T1 and the end surface T2 extending in the width direction and the longitudinal direction of the tape T are formed smoothly, and the main surface T1. And the edge line C where the end face T2 intersects are formed in a smooth curved surface.

  The concavo-convex portion forming apparatus 2 includes a male roll 21 in which a convex portion corresponding to the concavo-convex portion is formed on the outer peripheral surface, a female roll 22 in which a concave portion corresponding to the convex portion is formed, and these male and female dies. Drive means for rotating both mold rolls 21 and 22 in opposite directions in synchronization is provided.

  3 and FIG. 3 by feeding the tape T extruded from the extrusion molding apparatus 1 between the male and female rolls 21 and 22 of the concavo-convex part forming apparatus 2 disposed in the immediate vicinity of the extrusion mold 15. In this case, the both sides of the tape T shown in FIG. 4 are recessed in a shallow partial spherical shell shape, for example, from the front surface to the back surface side with a predetermined interval in the longitudinal direction of the tape T. Concave and convex portions P are formed in which concave portions and convex portions protruding in a shallow partial spherical shell shape, for example, are formed alternately on the back surface from the front surface of the tape T.

  It should be noted that a heating element is incorporated in one or both of the male and female rolls 21 and 22 to facilitate the formation of the concavo-convex portion P, and conversely, the male and female rolls 21 and 22 Although the cooling medium may be circulated through one or both of them to cool the tape T and promote its solidification, this heating element is not always necessary.

  Further, the shape of the concavo-convex portion P is not limited to this, and may be formed in an arbitrary shape such as a corrugated shape or a kamaboko shape, or may be formed in a corrugated shape protruding only on one side of the tape T.

  Now, for example, by appropriately setting the interval between the extrusion molding device 1 and the concavo-convex portion forming device 2, if the thermoplastic synthetic resin R is cooled to a temperature lower than the melting point when the concavo-convex portion P is formed, As shown in FIG. 3, the smoothness of the main surface T1 and the end surface T2 of the tape T and the smoothness of the ridge line C are not impaired in the formation of the concavo-convex portion P, and the cross-section of the edge portion of the cooled spacer tape The shape is the same as that shown in FIG.

  When the spacer tape is formed as described above, the step of cutting is not performed when the tape T is formed. Therefore, there is no possibility that chips are formed, and there is a problem of contamination due to chips generated when the tape T is formed. No fear.

  In addition, the end surface T2 in the width direction of the spacer tape is smoothed, and the ridge line C where the end surface T2 intersects the main surface T1 of the front and back surfaces is a smooth curved surface. At this time, there is no fear of generating waste, and there is no possibility of causing a problem of contamination due to waste generated when the spacer tape is wound around the reel or when the spacer tape is fed out.

  Furthermore, after the tape T is formed, it is not necessary to heat the tape T in order to form the concavo-convex portion P. Therefore, energy can be saved greatly, and the number of steps can be reduced and the manufacturing time can be reduced. Cost can be reduced

  In addition, the end surface T2 in the width direction of the spacer tape is smoothed, and the ridge line C where the end surface T2 intersects the main surface T1 of the front and back surfaces is a smooth curved surface. The feeding becomes smooth.

  In the above-described embodiments, a series of extrusion molding apparatuses have been described. However, the present invention is not limited to this, and by adopting a multiple-series extrusion molding apparatus of a duplex system or a triple system or more. Productivity may be further improved.

  The present invention is applied to a spacer tape manufacturing method and a spacer tape that are sandwiched between the tab tapes in order to prevent the tab tapes from contacting each other.

FIG. 1 is a cross-sectional view schematically showing the configuration of a spacer tape manufacturing apparatus for carrying out the method of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section of the edge portion in the width direction of the tape formed by the spacer tape manufacturing apparatus. FIG. 3 is a cross-sectional view schematically showing a cross-section in the width direction of the spacer tape according to one embodiment of the present invention manufactured by the spacer tape manufacturing apparatus. FIG. 4 is a perspective view showing an embodiment of the spacer tape of the present invention. FIG. 5 is a cross-sectional view schematically showing a cross-section of the edge portion in the width direction of a conventional spacer tape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extrusion molding apparatus 2 Concavity and convexity formation apparatus 11 Cylinder 12 Screw 13 Hopper 14 Extrusion die 15 Heater 21 Roll 22 Roll P Concavity and convexity R Thermoplastic synthetic resin T Tape

Claims (2)

An extrusion process in which a thermoplastic resin is extruded to form a film-like tape, and subsequent to this extrusion process, the tape formed by this extrusion process is cooled to below the softening point. In the side edge portion of the tape, with an interval in the longitudinal direction of the tape, forming an uneven portion that is uneven in the thickness direction of the tape, and until it is solidified by cooling from the molten state, The surface tension of the front and back surfaces extending in the width direction and the longitudinal direction of the tape and the end surface in the width direction are formed smoothly by surface tension, and a ridge line intersecting the main surface and the end surface is formed into a smooth curved surface. A method of manufacturing a spacer tape, characterized in that it is performed . In the spacer tape in which the concavo-convex part is formed with a space in the longitudinal direction on the flat band tape,
  The tape is formed by extrusion, and after the concave and convex portions are formed on the tape, the tape is formed on the tape before being cooled below the softening point, and is cooled from the molten state. Before solidification, the surface tension causes the front and back main surfaces spreading in the width and longitudinal directions of the tape and the end surfaces in the width direction to be formed smoothly, and the ridge line intersecting the main surfaces and the end surfaces is smooth. A spacer tape formed into a curved surface.

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